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-rw-r--r--MAINTAINERS6
-rw-r--r--arch/alpha/kernel/setup.c2
-rw-r--r--arch/arc/kernel/setup.c4
-rw-r--r--arch/arm/kernel/setup.c2
-rw-r--r--arch/arm64/kernel/setup.c3
-rw-r--r--arch/csky/kernel/setup.c4
-rw-r--r--arch/ia64/kernel/setup.c3
-rw-r--r--arch/m68k/kernel/setup_mm.c4
-rw-r--r--arch/m68k/kernel/setup_no.c4
-rw-r--r--arch/m68k/sun3x/config.c1
-rw-r--r--arch/microblaze/kernel/setup.c4
-rw-r--r--arch/mips/kernel/setup.c2
-rw-r--r--arch/nds32/kernel/setup.c5
-rw-r--r--arch/nios2/kernel/setup.c4
-rw-r--r--arch/openrisc/kernel/setup.c5
-rw-r--r--arch/parisc/kernel/setup.c4
-rw-r--r--arch/powerpc/kernel/legacy_serial.c4
-rw-r--r--arch/powerpc/kernel/setup-common.c3
-rw-r--r--arch/powerpc/platforms/cell/setup.c3
-rw-r--r--arch/powerpc/platforms/maple/setup.c3
-rw-r--r--arch/powerpc/platforms/pasemi/setup.c4
-rw-r--r--arch/powerpc/platforms/ps3/setup.c4
-rw-r--r--arch/riscv/kernel/setup.c4
-rw-r--r--arch/s390/kernel/setup.c2
-rw-r--r--arch/sh/kernel/setup.c4
-rw-r--r--arch/sparc/kernel/setup_32.c4
-rw-r--r--arch/sparc/kernel/setup_64.c4
-rw-r--r--arch/unicore32/kernel/setup.c2
-rw-r--r--arch/x86/kernel/setup.c2
-rw-r--r--arch/xtensa/kernel/setup.c2
-rw-r--r--drivers/char/ttyprintk.c15
-rw-r--r--drivers/tty/n_hdlc.c11
-rw-r--r--drivers/tty/serdev/core.c14
-rw-r--r--drivers/tty/serial/21285.c55
-rw-r--r--drivers/tty/serial/8250/8250_aspeed_vuart.c5
-rw-r--r--drivers/tty/serial/8250/8250_bcm2835aux.c50
-rw-r--r--drivers/tty/serial/8250/8250_core.c1
-rw-r--r--drivers/tty/serial/8250/8250_exar.c6
-rw-r--r--drivers/tty/serial/8250/8250_fsl.c4
-rw-r--r--drivers/tty/serial/8250/8250_of.c4
-rw-r--r--drivers/tty/serial/8250/8250_omap.c5
-rw-r--r--drivers/tty/serial/8250/8250_port.c8
-rw-r--r--drivers/tty/serial/8250/Kconfig10
-rw-r--r--drivers/tty/serial/Kconfig4
-rw-r--r--drivers/tty/serial/amba-pl010.c5
-rw-r--r--drivers/tty/serial/amba-pl011.c13
-rw-r--r--drivers/tty/serial/apbuart.c5
-rw-r--r--drivers/tty/serial/arc_uart.c5
-rw-r--r--drivers/tty/serial/atmel_serial.c41
-rw-r--r--drivers/tty/serial/bcm63xx_uart.c5
-rw-r--r--drivers/tty/serial/clps711x.c5
-rw-r--r--drivers/tty/serial/cpm_uart/cpm_uart_core.c9
-rw-r--r--drivers/tty/serial/dz.c5
-rw-r--r--drivers/tty/serial/efm32-uart.c5
-rw-r--r--drivers/tty/serial/fsl_linflexuart.c8
-rw-r--r--drivers/tty/serial/fsl_lpuart.c16
-rw-r--r--drivers/tty/serial/imx.c58
-rw-r--r--drivers/tty/serial/ip22zilog.c7
-rw-r--r--drivers/tty/serial/kgdb_nmi.c4
-rw-r--r--drivers/tty/serial/meson_uart.c70
-rw-r--r--drivers/tty/serial/milbeaut_usio.c5
-rw-r--r--drivers/tty/serial/mpc52xx_uart.c11
-rw-r--r--drivers/tty/serial/msm_serial.c23
-rw-r--r--drivers/tty/serial/mux.c5
-rw-r--r--drivers/tty/serial/mxs-auart.c5
-rw-r--r--drivers/tty/serial/omap-serial.c12
-rw-r--r--drivers/tty/serial/pch_uart.c12
-rw-r--r--drivers/tty/serial/pmac_zilog.c5
-rw-r--r--drivers/tty/serial/pnx8xxx_uart.c7
-rw-r--r--drivers/tty/serial/pxa.c5
-rw-r--r--drivers/tty/serial/qcom_geni_serial.c128
-rw-r--r--drivers/tty/serial/sa1100.c7
-rw-r--r--drivers/tty/serial/samsung.h147
-rw-r--r--drivers/tty/serial/samsung_tty.c315
-rw-r--r--drivers/tty/serial/sb1250-duart.c5
-rw-r--r--drivers/tty/serial/sccnxp.c5
-rw-r--r--drivers/tty/serial/serial-tegra.c94
-rw-r--r--drivers/tty/serial/serial_core.c84
-rw-r--r--drivers/tty/serial/serial_txx9.c5
-rw-r--r--drivers/tty/serial/sh-sci.c10
-rw-r--r--drivers/tty/serial/sprd_serial.c5
-rw-r--r--drivers/tty/serial/st-asc.c17
-rw-r--r--drivers/tty/serial/stm32-usart.c5
-rw-r--r--drivers/tty/serial/sunhv.c5
-rw-r--r--drivers/tty/serial/sunsab.c5
-rw-r--r--drivers/tty/serial/sunsu.c5
-rw-r--r--drivers/tty/serial/sunzilog.c6
-rw-r--r--drivers/tty/serial/ucc_uart.c4
-rw-r--r--drivers/tty/serial/vr41xx_siu.c5
-rw-r--r--drivers/tty/serial/vt8500_serial.c5
-rw-r--r--drivers/tty/serial/xilinx_uartps.c51
-rw-r--r--drivers/tty/serial/zs.c5
-rw-r--r--drivers/tty/synclink_gt.c20
-rw-r--r--drivers/tty/synclinkmp.c24
-rw-r--r--drivers/tty/sysrq.c9
-rw-r--r--drivers/tty/tty_baudrate.c28
-rw-r--r--drivers/tty/tty_io.c2
-rw-r--r--drivers/tty/vt/.gitignore1
-rw-r--r--drivers/tty/vt/Makefile6
-rw-r--r--drivers/tty/vt/conmakehash.c (renamed from scripts/conmakehash.c)0
-rw-r--r--drivers/tty/vt/vt.c8
-rw-r--r--drivers/video/console/Kconfig1
-rw-r--r--include/linux/serial_8250.h1
-rw-r--r--include/linux/serial_core.h91
-rw-r--r--scripts/.gitignore1
-rw-r--r--scripts/Makefile3
106 files changed, 824 insertions, 934 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 3d291b28c2b4..5590daffdb5a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6181,6 +6181,12 @@ M: Maxim Levitsky <maximlevitsky@gmail.com>
S: Maintained
F: drivers/media/rc/ene_ir.*
+EPAPR HYPERVISOR BYTE CHANNEL DEVICE DRIVER
+M: Laurentiu Tudor <laurentiu.tudor@nxp.com>
+L: linuxppc-dev@lists.ozlabs.org
+S: Maintained
+F: drivers/tty/ehv_bytechan.c
+
EPSON S1D13XXX FRAMEBUFFER DRIVER
M: Kristoffer Ericson <kristoffer.ericson@gmail.com>
S: Maintained
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index 5d4c76a77a9f..f19aa577354b 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -655,8 +655,6 @@ setup_arch(char **cmdline_p)
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
#endif
#endif
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 7ee89dc61f6e..e1c647490f00 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -572,10 +572,6 @@ void __init setup_arch(char **cmdline_p)
*/
root_mountflags &= ~MS_RDONLY;
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-#endif
-
arc_unwind_init();
}
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index d0a464e317ea..d8e18cdd96d3 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -1164,8 +1164,6 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
#endif
#endif
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index b6f9455d7ca3..a34890bf309f 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -360,9 +360,6 @@ void __init setup_arch(char **cmdline_p)
init_task.thread_info.ttbr0 = __pa_symbol(empty_zero_page);
#endif
-#ifdef CONFIG_VT
- conswitchp = &dummy_con;
-#endif
if (boot_args[1] || boot_args[2] || boot_args[3]) {
pr_err("WARNING: x1-x3 nonzero in violation of boot protocol:\n"
"\tx1: %016llx\n\tx2: %016llx\n\tx3: %016llx\n"
diff --git a/arch/csky/kernel/setup.c b/arch/csky/kernel/setup.c
index 23ee604aafdb..52eaf31ba27f 100644
--- a/arch/csky/kernel/setup.c
+++ b/arch/csky/kernel/setup.c
@@ -136,10 +136,6 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_HIGHMEM
kmap_init();
#endif
-
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-#endif
}
unsigned long va_pa_offset;
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index c49fcef754de..4009383453f7 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -608,9 +608,6 @@ setup_arch (char **cmdline_p)
#ifdef CONFIG_VT
if (!conswitchp) {
-# if defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-# endif
# if defined(CONFIG_VGA_CONSOLE)
/*
* Non-legacy systems may route legacy VGA MMIO range to system
diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 528484feff80..ab8aa7be260f 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -274,10 +274,6 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
switch (m68k_machtype) {
#ifdef CONFIG_AMIGA
case MACH_AMIGA:
diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
index 3c5def10d486..a63483de7a42 100644
--- a/arch/m68k/kernel/setup_no.c
+++ b/arch/m68k/kernel/setup_no.c
@@ -146,10 +146,6 @@ void __init setup_arch(char **cmdline_p)
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
boot_command_line[COMMAND_LINE_SIZE-1] = 0;
-#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-#endif
-
/*
* Give all the memory to the bootmap allocator, tell it to put the
* boot mem_map at the start of memory.
diff --git a/arch/m68k/sun3x/config.c b/arch/m68k/sun3x/config.c
index 03ce7f9facfe..d806dee71a9c 100644
--- a/arch/m68k/sun3x/config.c
+++ b/arch/m68k/sun3x/config.c
@@ -70,7 +70,6 @@ void __init config_sun3x(void)
break;
default:
serial_console = 0;
- conswitchp = &dummy_con;
break;
}
#endif
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index 522a0c5d9c59..511c1ab7f57f 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -65,10 +65,6 @@ void __init setup_arch(char **cmdline_p)
microblaze_cache_init();
xilinx_pci_init();
-
-#if defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-#endif
}
#ifdef CONFIG_MTD_UCLINUX
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index c3d4212b5f1d..a28057946ed1 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -796,8 +796,6 @@ void __init setup_arch(char **cmdline_p)
#if defined(CONFIG_VT)
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
#endif
#endif
diff --git a/arch/nds32/kernel/setup.c b/arch/nds32/kernel/setup.c
index 31d29d92478e..a066efbe53c0 100644
--- a/arch/nds32/kernel/setup.c
+++ b/arch/nds32/kernel/setup.c
@@ -317,11 +317,6 @@ void __init setup_arch(char **cmdline_p)
unflatten_and_copy_device_tree();
- if(IS_ENABLED(CONFIG_VT)) {
- if(IS_ENABLED(CONFIG_DUMMY_CONSOLE))
- conswitchp = &dummy_con;
- }
-
*cmdline_p = boot_command_line;
early_trap_init();
}
diff --git a/arch/nios2/kernel/setup.c b/arch/nios2/kernel/setup.c
index 4cf35b09c0ec..3c6e3c813a0b 100644
--- a/arch/nios2/kernel/setup.c
+++ b/arch/nios2/kernel/setup.c
@@ -196,8 +196,4 @@ void __init setup_arch(char **cmdline_p)
* get kmalloc into gear
*/
paging_init();
-
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
-#endif
}
diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index d668f5be3a99..c0a774b51e45 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -308,11 +308,6 @@ void __init setup_arch(char **cmdline_p)
/* paging_init() sets up the MMU and marks all pages as reserved */
paging_init();
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
- if (!conswitchp)
- conswitchp = &dummy_con;
-#endif
-
*cmdline_p = boot_command_line;
printk(KERN_INFO "OpenRISC Linux -- http://openrisc.io\n");
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 53a21ce927de..e320bae501d3 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -151,10 +151,6 @@ void __init setup_arch(char **cmdline_p)
dma_ops_init();
#endif
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con; /* we use do_take_over_console() later ! */
-#endif
-
clear_sched_clock_stable();
}
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 7cea5978f21f..f061e06e9f51 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -479,8 +479,10 @@ static void __init fixup_port_irq(int index,
port->irq = virq;
#ifdef CONFIG_SERIAL_8250_FSL
- if (of_device_is_compatible(np, "fsl,ns16550"))
+ if (of_device_is_compatible(np, "fsl,ns16550")) {
port->handle_irq = fsl8250_handle_irq;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+ }
#endif
}
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 488f1eecc0de..7f8c890360fe 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -949,9 +949,6 @@ void __init setup_arch(char **cmdline_p)
early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
- if (IS_ENABLED(CONFIG_DUMMY_CONSOLE))
- conswitchp = &dummy_con;
-
if (ppc_md.setup_arch)
ppc_md.setup_arch();
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index 9680d766f20e..855eedb8d7d7 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -240,9 +240,6 @@ static void __init cell_setup_arch(void)
init_pci_config_tokens();
cbe_pervasive_init();
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
mmio_nvram_init();
}
diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
index 9cd6f3e1000b..47f73103ef74 100644
--- a/arch/powerpc/platforms/maple/setup.c
+++ b/arch/powerpc/platforms/maple/setup.c
@@ -183,9 +183,6 @@ static void __init maple_setup_arch(void)
/* Lookup PCI hosts */
maple_pci_init();
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
maple_use_rtas_reboot_and_halt_if_present();
printk(KERN_DEBUG "Using native/NAP idle loop\n");
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index 05a52f10c2f0..b612474f8f8e 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -147,10 +147,6 @@ static void __init pas_setup_arch(void)
/* Lookup PCI hosts */
pas_pci_init();
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
/* Remap SDC register for doing reset */
/* XXXOJN This should maybe come out of the device tree */
reset_reg = ioremap(0xfc101100, 4);
diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c
index 8108b9b9b9ea..b29368931c56 100644
--- a/arch/powerpc/platforms/ps3/setup.c
+++ b/arch/powerpc/platforms/ps3/setup.c
@@ -200,10 +200,6 @@ static void __init ps3_setup_arch(void)
smp_init_ps3();
#endif
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
prealloc_ps3fb_videomemory();
prealloc_ps3flash_bounce_buffer();
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index 365ff8420bfe..9babfcf3bb70 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -78,9 +78,5 @@ void __init setup_arch(char **cmdline_p)
setup_smp();
#endif
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
riscv_fill_hwcap();
}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index d5fbd754f41a..87a467dff5eb 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -241,8 +241,6 @@ static void __init conmode_default(void)
SET_CONSOLE_SCLP;
#endif
}
- if (IS_ENABLED(CONFIG_VT) && IS_ENABLED(CONFIG_DUMMY_CONSOLE))
- conswitchp = &dummy_con;
}
#ifdef CONFIG_CRASH_DUMP
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index d232cfa01877..67f5a3b44c2e 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -341,10 +341,6 @@ void __init setup_arch(char **cmdline_p)
paging_init();
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
/* Perform the machine specific initialisation */
if (likely(sh_mv.mv_setup))
sh_mv.mv_setup(cmdline_p);
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
index afe1592a6d08..5d1bcfce05d8 100644
--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -332,10 +332,6 @@ void __init setup_arch(char **cmdline_p)
break;
}
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
idprom_init();
load_mmu();
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index fd2182a5c32d..75e3992203b6 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -653,10 +653,6 @@ void __init setup_arch(char **cmdline_p)
else
pr_info("ARCH: SUN4U\n");
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
idprom_init();
if (!root_flags)
diff --git a/arch/unicore32/kernel/setup.c b/arch/unicore32/kernel/setup.c
index 95ae3b54df68..0c4242a5ee1d 100644
--- a/arch/unicore32/kernel/setup.c
+++ b/arch/unicore32/kernel/setup.c
@@ -270,8 +270,6 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
#endif
#endif
early_trap_init();
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 2441b64d061f..1e4c20a1efec 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1228,8 +1228,6 @@ void __init setup_arch(char **cmdline_p)
#if defined(CONFIG_VGA_CONSOLE)
if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
#endif
#endif
x86_init.oem.banner();
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 0f93b67c7a5a..adead45debe8 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -405,8 +405,6 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_VT
# if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
-# elif defined(CONFIG_DUMMY_CONSOLE)
- conswitchp = &dummy_con;
# endif
#endif
}
diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
index 4f24e46ebe7c..56db949a7b70 100644
--- a/drivers/char/ttyprintk.c
+++ b/drivers/char/ttyprintk.c
@@ -15,10 +15,11 @@
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/module.h>
+#include <linux/spinlock.h>
struct ttyprintk_port {
struct tty_port port;
- struct mutex port_write_mutex;
+ spinlock_t spinlock;
};
static struct ttyprintk_port tpk_port;
@@ -99,11 +100,12 @@ static int tpk_open(struct tty_struct *tty, struct file *filp)
static void tpk_close(struct tty_struct *tty, struct file *filp)
{
struct ttyprintk_port *tpkp = tty->driver_data;
+ unsigned long flags;
- mutex_lock(&tpkp->port_write_mutex);
+ spin_lock_irqsave(&tpkp->spinlock, flags);
/* flush tpk_printk buffer */
tpk_printk(NULL, 0);
- mutex_unlock(&tpkp->port_write_mutex);
+ spin_unlock_irqrestore(&tpkp->spinlock, flags);
tty_port_close(&tpkp->port, tty, filp);
}
@@ -115,13 +117,14 @@ static int tpk_write(struct tty_struct *tty,
const unsigned char *buf, int count)
{
struct ttyprintk_port *tpkp = tty->driver_data;
+ unsigned long flags;
int ret;
/* exclusive use of tpk_printk within this tty */
- mutex_lock(&tpkp->port_write_mutex);
+ spin_lock_irqsave(&tpkp->spinlock, flags);
ret = tpk_printk(buf, count);
- mutex_unlock(&tpkp->port_write_mutex);
+ spin_unlock_irqrestore(&tpkp->spinlock, flags);
return ret;
}
@@ -171,7 +174,7 @@ static int __init ttyprintk_init(void)
{
int ret = -ENOMEM;
- mutex_init(&tpk_port.port_write_mutex);
+ spin_lock_init(&tpk_port.spinlock);
ttyprintk_driver = tty_alloc_driver(1,
TTY_DRIVER_RESET_TERMIOS |
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 98361acd3053..27b506bf03ce 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -115,11 +115,9 @@
struct n_hdlc_buf {
struct list_head list_item;
int count;
- char buf[1];
+ char buf[];
};
-#define N_HDLC_BUF_SIZE (sizeof(struct n_hdlc_buf) + maxframe)
-
struct n_hdlc_buf_list {
struct list_head list;
int count;
@@ -524,7 +522,8 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
/* no buffers in free list, attempt to allocate another rx buffer */
/* unless the maximum count has been reached */
if (n_hdlc->rx_buf_list.count < MAX_RX_BUF_COUNT)
- buf = kmalloc(N_HDLC_BUF_SIZE, GFP_ATOMIC);
+ buf = kmalloc(struct_size(buf, buf, maxframe),
+ GFP_ATOMIC);
}
if (!buf) {
@@ -853,7 +852,7 @@ static struct n_hdlc *n_hdlc_alloc(void)
/* allocate free rx buffer list */
for(i=0;i<DEFAULT_RX_BUF_COUNT;i++) {
- buf = kmalloc(N_HDLC_BUF_SIZE, GFP_KERNEL);
+ buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
if (buf)
n_hdlc_buf_put(&n_hdlc->rx_free_buf_list,buf);
else if (debuglevel >= DEBUG_LEVEL_INFO)
@@ -862,7 +861,7 @@ static struct n_hdlc *n_hdlc_alloc(void)
/* allocate free tx buffer list */
for(i=0;i<DEFAULT_TX_BUF_COUNT;i++) {
- buf = kmalloc(N_HDLC_BUF_SIZE, GFP_KERNEL);
+ buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
if (buf)
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list,buf);
else if (debuglevel >= DEBUG_LEVEL_INFO)
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index ce5309d00280..42345e79920c 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -115,8 +115,8 @@ int serdev_device_add(struct serdev_device *serdev)
err = device_add(&serdev->dev);
if (err < 0) {
- dev_err(&serdev->dev, "Can't add %s, status %d\n",
- dev_name(&serdev->dev), err);
+ dev_err(&serdev->dev, "Can't add %s, status %pe\n",
+ dev_name(&serdev->dev), ERR_PTR(err));
goto err_clear_serdev;
}
@@ -540,7 +540,8 @@ static int of_serdev_register_devices(struct serdev_controller *ctrl)
err = serdev_device_add(serdev);
if (err) {
dev_err(&serdev->dev,
- "failure adding device. status %d\n", err);
+ "failure adding device. status %pe\n",
+ ERR_PTR(err));
serdev_device_put(serdev);
} else
found = true;
@@ -656,7 +657,8 @@ static acpi_status acpi_serdev_register_device(struct serdev_controller *ctrl,
err = serdev_device_add(serdev);
if (err) {
dev_err(&serdev->dev,
- "failure adding ACPI serdev device. status %d\n", err);
+ "failure adding ACPI serdev device. status %pe\n",
+ ERR_PTR(err));
serdev_device_put(serdev);
}
@@ -741,8 +743,8 @@ int serdev_controller_add(struct serdev_controller *ctrl)
ret_of = of_serdev_register_devices(ctrl);
ret_acpi = acpi_serdev_register_devices(ctrl);
if (ret_of && ret_acpi) {
- dev_dbg(&ctrl->dev, "no devices registered: of:%d acpi:%d\n",
- ret_of, ret_acpi);
+ dev_dbg(&ctrl->dev, "no devices registered: of:%pe acpi:%pe\n",
+ ERR_PTR(ret_of), ERR_PTR(ret_acpi));
ret = -ENODEV;
goto err_rpm_disable;
}
diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c
index 32b3acf8150a..718e010fcb04 100644
--- a/drivers/tty/serial/21285.c
+++ b/drivers/tty/serial/21285.c
@@ -41,8 +41,43 @@
static const char serial21285_name[] = "Footbridge UART";
-#define tx_enabled(port) ((port)->unused[0])
-#define rx_enabled(port) ((port)->unused[1])
+/*
+ * We only need 2 bits of data, so instead of creating a whole structure for
+ * this, use bits of the private_data pointer of the uart port structure.
+ */
+#define tx_enabled_bit 0
+#define rx_enabled_bit 1
+
+static bool is_enabled(struct uart_port *port, int bit)
+{
+ unsigned long private_data = (unsigned long)port->private_data;
+
+ if (test_bit(bit, &private_data))
+ return true;
+ return false;
+}
+
+static void enable(struct uart_port *port, int bit)
+{
+ unsigned long private_data = (unsigned long)port->private_data;
+
+ set_bit(bit, &private_data);
+}
+
+static void disable(struct uart_port *port, int bit)
+{
+ unsigned long private_data = (unsigned long)port->private_data;
+
+ clear_bit(bit, &private_data);
+}
+
+#define is_tx_enabled(port) is_enabled(port, tx_enabled_bit)
+#define tx_enable(port) enable(port, tx_enabled_bit)
+#define tx_disable(port) disable(port, tx_enabled_bit)
+
+#define is_rx_enabled(port) is_enabled(port, rx_enabled_bit)
+#define rx_enable(port) enable(port, rx_enabled_bit)
+#define rx_disable(port) disable(port, rx_enabled_bit)
/*
* The documented expression for selecting the divisor is:
@@ -57,25 +92,25 @@ static const char serial21285_name[] = "Footbridge UART";
static void serial21285_stop_tx(struct uart_port *port)
{
- if (tx_enabled(port)) {
+ if (is_tx_enabled(port)) {
disable_irq_nosync(IRQ_CONTX);
- tx_enabled(port) = 0;
+ tx_disable(port);
}
}
static void serial21285_start_tx(struct uart_port *port)
{
- if (!tx_enabled(port)) {
+ if (!is_tx_enabled(port)) {
enable_irq(IRQ_CONTX);
- tx_enabled(port) = 1;
+ tx_enable(port);
}
}
static void serial21285_stop_rx(struct uart_port *port)
{
- if (rx_enabled(port)) {
+ if (is_rx_enabled(port)) {
disable_irq_nosync(IRQ_CONRX);
- rx_enabled(port) = 0;
+ rx_disable(port);
}
}
@@ -185,8 +220,8 @@ static int serial21285_startup(struct uart_port *port)
{
int ret;
- tx_enabled(port) = 1;
- rx_enabled(port) = 1;
+ tx_enable(port);
+ rx_enable(port);
ret = request_irq(IRQ_CONRX, serial21285_rx_chars, 0,
serial21285_name, port);
diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c
index 6e67fd89445a..d657aa14c3e4 100644
--- a/drivers/tty/serial/8250/8250_aspeed_vuart.c
+++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c
@@ -5,10 +5,6 @@
* Copyright (C) 2016 Jeremy Kerr <jk@ozlabs.org>, IBM Corp.
* Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp.
*/
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of_address.h>
@@ -406,6 +402,7 @@ static int aspeed_vuart_probe(struct platform_device *pdev)
port.port.unthrottle = aspeed_vuart_unthrottle;
port.port.status = UPSTAT_SYNC_FIFO;
port.port.dev = &pdev->dev;
+ port.port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
rc = sysfs_create_group(&vuart->dev->kobj, &aspeed_vuart_attr_group);
if (rc < 0)
diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index 8ce700c1a7fc..e70e3cc30050 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -16,14 +16,19 @@
#include "8250.h"
+/**
+ * struct bcm2835aux_data - driver private data of BCM2835 auxiliary UART
+ * @clk: clock producer of the port's uartclk
+ * @line: index of the port's serial8250_ports[] entry
+ */
struct bcm2835aux_data {
- struct uart_8250_port uart;
struct clk *clk;
int line;
};
static int bcm2835aux_serial_probe(struct platform_device *pdev)
{
+ struct uart_8250_port up = { };
struct bcm2835aux_data *data;
struct resource *res;
int ret;
@@ -34,23 +39,21 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
return -ENOMEM;
/* initialize data */
- spin_lock_init(&data->uart.port.lock);
- data->uart.capabilities = UART_CAP_FIFO | UART_CAP_MINI;
- data->uart.port.dev = &pdev->dev;
- data->uart.port.regshift = 2;
- data->uart.port.type = PORT_16550;
- data->uart.port.iotype = UPIO_MEM;
- data->uart.port.fifosize = 8;
- data->uart.port.flags = UPF_SHARE_IRQ |
- UPF_FIXED_PORT |
- UPF_FIXED_TYPE |
- UPF_SKIP_TEST;
+ up.capabilities = UART_CAP_FIFO | UART_CAP_MINI;
+ up.port.dev = &pdev->dev;
+ up.port.regshift = 2;
+ up.port.type = PORT_16550;
+ up.port.iotype = UPIO_MEM;
+ up.port.fifosize = 8;
+ up.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE |
+ UPF_SKIP_TEST | UPF_IOREMAP;
/* get the clock - this also enables the HW */
data->clk = devm_clk_get(&pdev->dev, NULL);
ret = PTR_ERR_OR_ZERO(data->clk);
if (ret) {
- dev_err(&pdev->dev, "could not get clk: %d\n", ret);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "could not get clk: %d\n", ret);
return ret;
}
@@ -58,7 +61,7 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
ret = platform_get_irq(pdev, 0);
if (ret < 0)
return ret;
- data->uart.port.irq = ret;
+ up.port.irq = ret;
/* map the main registers */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -66,15 +69,13 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "memory resource not found");
return -EINVAL;
}
- data->uart.port.membase = devm_ioremap_resource(&pdev->dev, res);
- ret = PTR_ERR_OR_ZERO(data->uart.port.membase);
- if (ret)
- return ret;
+ up.port.mapbase = res->start;
+ up.port.mapsize = resource_size(res);
/* Check for a fixed line number */
ret = of_alias_get_id(pdev->dev.of_node, "serial");
if (ret >= 0)
- data->uart.port.line = ret;
+ up.port.line = ret;
/* enable the clock as a last step */
ret = clk_prepare_enable(data->clk);
@@ -89,13 +90,14 @@ static int bcm2835aux_serial_probe(struct platform_device *pdev)
* so we have to multiply the actual clock by 2
* to get identical baudrates.
*/
- data->uart.port.uartclk = clk_get_rate(data->clk) * 2;
+ up.port.uartclk = clk_get_rate(data->clk) * 2;
/* register the port */
- ret = serial8250_register_8250_port(&data->uart);
+ ret = serial8250_register_8250_port(&up);
if (ret < 0) {
- dev_err(&pdev->dev, "unable to register 8250 port - %d\n",
- ret);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "unable to register 8250 port - %d\n", ret);
goto dis_clk;
}
data->line = ret;
@@ -113,7 +115,7 @@ static int bcm2835aux_serial_remove(struct platform_device *pdev)
{
struct bcm2835aux_data *data = platform_get_drvdata(pdev);
- serial8250_unregister_port(data->uart.port.line);
+ serial8250_unregister_port(data->line);
clk_disable_unprepare(data->clk);
return 0;
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index e682390ce0de..0894a22fd702 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -816,6 +816,7 @@ static int serial8250_probe(struct platform_device *dev)
uart.port.flags = p->flags;
uart.port.mapbase = p->mapbase;
uart.port.hub6 = p->hub6;
+ uart.port.has_sysrq = p->has_sysrq;
uart.port.private_data = p->private_data;
uart.port.type = p->type;
uart.port.serial_in = p->serial_in;
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 108cd55f9c4d..91e9b070d36d 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -186,7 +186,7 @@ static int xr17v35x_startup(struct uart_port *port)
static void exar_shutdown(struct uart_port *port)
{
unsigned char lsr;
- bool tx_complete = 0;
+ bool tx_complete = false;
struct uart_8250_port *up = up_to_u8250p(port);
struct circ_buf *xmit = &port->state->xmit;
int i = 0;
@@ -194,9 +194,9 @@ static void exar_shutdown(struct uart_port *port)
do {
lsr = serial_in(up, UART_LSR);
if (lsr & (UART_LSR_TEMT | UART_LSR_THRE))
- tx_complete = 1;
+ tx_complete = true;
else
- tx_complete = 0;
+ tx_complete = false;
usleep_range(1000, 1100);
} while (!uart_circ_empty(xmit) && !tx_complete && i++ < 1000);
diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c
index aa0e216d5ead..0d0c80905c58 100644
--- a/drivers/tty/serial/8250/8250_fsl.c
+++ b/drivers/tty/serial/8250/8250_fsl.c
@@ -1,8 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_reg.h>
#include <linux/serial_8250.h>
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index 92fbf46ce3bd..531ad67395e0 100644
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -222,8 +222,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
if (IS_ENABLED(CONFIG_SERIAL_8250_FSL) &&
(of_device_is_compatible(np, "fsl,ns16550") ||
- of_device_is_compatible(np, "fsl,16550-FIFO64")))
+ of_device_is_compatible(np, "fsl,16550-FIFO64"))) {
port->handle_irq = fsl8250_handle_irq;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+ }
return 0;
err_unprepare:
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index e603c66d6cc4..6f343ca08440 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -8,10 +8,6 @@
*
*/
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
@@ -1192,6 +1188,7 @@ static int omap8250_probe(struct platform_device *pdev)
up.port.throttle = omap_8250_throttle;
up.port.unthrottle = omap_8250_unthrottle;
up.port.rs485_config = omap_8250_rs485_config;
+ up.port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
ret = of_alias_get_id(np, "serial");
if (ret < 0) {
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 9ff5dfad590a..430e3467aff7 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -11,10 +11,6 @@
* membase is an 'ioremapped' cookie.
*/
-#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ioport.h>
@@ -1001,6 +997,9 @@ static void autoconfig_16550a(struct uart_8250_port *up)
up->port.type = PORT_16550A;
up->capabilities |= UART_CAP_FIFO;
+ if (!IS_ENABLED(CONFIG_SERIAL_8250_16550A_VARIANTS))
+ return;
+
/*
* Check for presence of the EFR when DLAB is set.
* Only ST16C650V1 UARTs pass this test.
@@ -3055,6 +3054,7 @@ void serial8250_init_port(struct uart_8250_port *up)
spin_lock_init(&port->lock);
port->ops = &serial8250_pops;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
up->cur_iotype = 0xFF;
}
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index fab3d4f20667..ffd167e886ae 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -60,6 +60,16 @@ config SERIAL_8250_PNP
This builds standard PNP serial support. You may be able to
disable this feature if you only need legacy serial support.
+config SERIAL_8250_16550A_VARIANTS
+ bool "Support for variants of the 16550A serial port"
+ depends on SERIAL_8250
+ help
+ The 8250 driver can probe for many variants of the venerable 16550A
+ serial port. Doing so takes additional time at boot.
+
+ On modern systems, especially those using serial only for a simple
+ console, you can say N here.
+
config SERIAL_8250_FINTEK
bool "Support for Fintek F81216A LPC to 4 UART RS485 API"
depends on SERIAL_8250
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 99f5da3bf913..52eaac21ff9f 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -237,7 +237,7 @@ config SERIAL_CLPS711X_CONSOLE
config SERIAL_SAMSUNG
tristate "Samsung SoC serial support"
- depends on PLAT_SAMSUNG || ARCH_EXYNOS
+ depends on PLAT_SAMSUNG || ARCH_EXYNOS || COMPILE_TEST
select SERIAL_CORE
help
Support for the on-chip UARTs on the Samsung S3C24XX series CPUs,
@@ -975,7 +975,7 @@ config SERIAL_QCOM_GENI
config SERIAL_QCOM_GENI_CONSOLE
bool "QCOM GENI Serial Console support"
- depends on SERIAL_QCOM_GENI=y
+ depends on SERIAL_QCOM_GENI
select SERIAL_CORE_CONSOLE
select SERIAL_EARLYCON
help
diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index 2c37d11726ab..3284f34e9dfe 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -15,10 +15,6 @@
* and hooked into this driver.
*/
-#if defined(CONFIG_SERIAL_AMBA_PL010_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -728,6 +724,7 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id)
uap->port.iotype = UPIO_MEM;
uap->port.irq = dev->irq[0];
uap->port.fifosize = 16;
+ uap->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_AMBA_PL010_CONSOLE);
uap->port.ops = &amba_pl010_pops;
uap->port.flags = UPF_BOOT_AUTOCONF;
uap->port.line = i;
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 4b28134d596a..2296bb0f9578 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -16,11 +16,6 @@
* and hooked into this driver.
*/
-
-#if defined(CONFIG_SERIAL_AMBA_PL011_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -1452,8 +1447,6 @@ static void pl011_modem_status(struct uart_amba_port *uap)
static void check_apply_cts_event_workaround(struct uart_amba_port *uap)
{
- unsigned int dummy_read;
-
if (!uap->vendor->cts_event_workaround)
return;
@@ -1465,8 +1458,8 @@ static void check_apply_cts_event_workaround(struct uart_amba_port *uap)
* single apb access will incur 2 pclk(133.12Mhz) delay,
* so add 2 dummy reads
*/
- dummy_read = pl011_read(uap, REG_ICR);
- dummy_read = pl011_read(uap, REG_ICR);
+ pl011_read(uap, REG_ICR);
+ pl011_read(uap, REG_ICR);
}
static irqreturn_t pl011_int(int irq, void *dev_id)
@@ -2579,6 +2572,7 @@ static int pl011_setup_port(struct device *dev, struct uart_amba_port *uap,
uap->port.mapbase = mmiobase->start;
uap->port.membase = base;
uap->port.fifosize = uap->fifosize;
+ uap->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_AMBA_PL011_CONSOLE);
uap->port.flags = UPF_BOOT_AUTOCONF;
uap->port.line = index;
@@ -2769,6 +2763,7 @@ static struct platform_driver arm_sbsa_uart_platform_driver = {
.remove = sbsa_uart_remove,
.driver = {
.name = "sbsa-uart",
+ .pm = &pl011_dev_pm_ops,
.of_match_table = of_match_ptr(sbsa_uart_of_match),
.acpi_match_table = ACPI_PTR(sbsa_uart_acpi_match),
.suppress_bind_attrs = IS_BUILTIN(CONFIG_SERIAL_AMBA_PL011),
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index 60cd133ffbbc..e8d56e899ec7 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -11,10 +11,6 @@
* Copyright (C) 2009 Kristoffer Glembo <kristoffer@gaisler.com>, Aeroflex Gaisler AB
*/
-#if defined(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
@@ -626,6 +622,7 @@ static int __init grlib_apbuart_configure(void)
port->irq = 0;
port->iotype = UPIO_MEM;
port->ops = &grlib_apbuart_ops;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE);
port->flags = UPF_BOOT_AUTOCONF;
port->line = line;
port->uartclk = *freq_hz;
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
index d904a3a345e7..17c3fc398fc6 100644
--- a/drivers/tty/serial/arc_uart.c
+++ b/drivers/tty/serial/arc_uart.c
@@ -21,10 +21,6 @@
* -check if sysreq works
*/
-#if defined(CONFIG_SERIAL_ARC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/serial.h>
#include <linux/console.h>
@@ -625,6 +621,7 @@ static int arc_serial_probe(struct platform_device *pdev)
port->flags = UPF_BOOT_AUTOCONF;
port->line = dev_id;
port->ops = &arc_serial_pops;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_ARC_CONSOLE);
port->fifosize = ARC_UART_TX_FIFO_SIZE;
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 1ba9bc667e13..c15c398c88a9 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -51,10 +51,6 @@
#define ATMEL_RTS_HIGH_OFFSET 16
#define ATMEL_RTS_LOW_OFFSET 20
-#if defined(CONFIG_SERIAL_ATMEL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include "serial_mctrl_gpio.h"
@@ -196,10 +192,6 @@ struct atmel_uart_port {
static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
static DECLARE_BITMAP(atmel_ports_in_use, ATMEL_MAX_UART);
-#ifdef SUPPORT_SYSRQ
-static struct console atmel_console;
-#endif
-
#if defined(CONFIG_OF)
static const struct of_device_id atmel_serial_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-usart-serial" },
@@ -313,7 +305,11 @@ static int atmel_config_rs485(struct uart_port *port,
if (rs485conf->flags & SER_RS485_ENABLED) {
dev_dbg(port->dev, "Setting UART to RS485\n");
- atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
+ if (port->rs485.flags & SER_RS485_RX_DURING_TX)
+ atmel_port->tx_done_mask = ATMEL_US_TXRDY;
+ else
+ atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
+
atmel_uart_writel(port, ATMEL_US_TTGR,
rs485conf->delay_rts_after_send);
mode |= ATMEL_US_USMODE_RS485;
@@ -831,7 +827,7 @@ static void atmel_tx_chars(struct uart_port *port)
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
if (port->x_char &&
- (atmel_uart_readl(port, ATMEL_US_CSR) & atmel_port->tx_done_mask)) {
+ (atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY)) {
atmel_uart_write_char(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
@@ -839,8 +835,7 @@ static void atmel_tx_chars(struct uart_port *port)
if (uart_circ_empty(xmit) || uart_tx_stopped(port))
return;
- while (atmel_uart_readl(port, ATMEL_US_CSR) &
- atmel_port->tx_done_mask) {
+ while (atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY) {
atmel_uart_write_char(port, xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
@@ -851,10 +846,20 @@ static void atmel_tx_chars(struct uart_port *port)
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
- if (!uart_circ_empty(xmit))
+ if (!uart_circ_empty(xmit)) {
+ /* we still have characters to transmit, so we should continue
+ * transmitting them when TX is ready, regardless of
+ * mode or duplexity
+ */
+ atmel_port->tx_done_mask |= ATMEL_US_TXRDY;
+
/* Enable interrupts */
atmel_uart_writel(port, ATMEL_US_IER,
atmel_port->tx_done_mask);
+ } else {
+ if (atmel_uart_is_half_duplex(port))
+ atmel_port->tx_done_mask &= ~ATMEL_US_TXRDY;
+ }
}
static void atmel_complete_tx_dma(void *arg)
@@ -1067,7 +1072,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port)
chan_err:
dev_err(port->dev, "TX channel not available, switch to pio\n");
- atmel_port->use_dma_tx = 0;
+ atmel_port->use_dma_tx = false;
if (atmel_port->chan_tx)
atmel_release_tx_dma(port);
return -EINVAL;
@@ -1266,7 +1271,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
chan_err:
dev_err(port->dev, "RX channel not available, switch to pio\n");
- atmel_port->use_dma_rx = 0;
+ atmel_port->use_dma_rx = false;
if (atmel_port->chan_rx)
atmel_release_rx_dma(port);
return -EINVAL;
@@ -1693,7 +1698,7 @@ static int atmel_prepare_rx_pdc(struct uart_port *port)
DMA_FROM_DEVICE);
kfree(atmel_port->pdc_rx[0].buf);
}
- atmel_port->use_pdc_rx = 0;
+ atmel_port->use_pdc_rx = false;
return -ENOMEM;
}
pdc->dma_addr = dma_map_single(port->dev,
@@ -2526,8 +2531,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
* Use TXEMPTY for interrupt when rs485 or ISO7816 else TXRDY or
* ENDTX|TXBUFE
*/
- if (port->rs485.flags & SER_RS485_ENABLED ||
- port->iso7816.flags & SER_ISO7816_ENABLED)
+ if (atmel_uart_is_half_duplex(port))
atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
else if (atmel_use_pdc_tx(port)) {
port->fifosize = PDC_BUFFER_SIZE;
@@ -2878,6 +2882,7 @@ static int atmel_serial_probe(struct platform_device *pdev)
atmel_port = &atmel_ports[ret];
atmel_port->backup_imr = 0;
atmel_port->uart.line = ret;
+ atmel_port->uart.has_sysrq = IS_ENABLED(CONFIG_SERIAL_ATMEL_CONSOLE);
atmel_serial_probe_fifos(atmel_port, pdev);
atomic_set(&atmel_port->tasklet_shutdown, 0);
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index b7adc6127b3d..5674da2b76f0 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -10,10 +10,6 @@
* my board.
*/
-#if defined(CONFIG_SERIAL_BCM63XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/init.h>
@@ -858,6 +854,7 @@ static int bcm_uart_probe(struct platform_device *pdev)
port->fifosize = 16;
port->uartclk = clk_get_rate(clk) / 2;
port->line = pdev->id;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_BCM63XX_CONSOLE);
clk_put(clk);
ret = uart_add_one_port(&bcm_uart_driver, port);
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index 061590795680..95abc6faa3d5 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -8,10 +8,6 @@
* Copyright (C) 2000 Deep Blue Solutions Ltd.
*/
-#if defined(CONFIG_SERIAL_CLPS711X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/device.h>
#include <linux/console.h>
@@ -479,6 +475,7 @@ static int uart_clps711x_probe(struct platform_device *pdev)
s->port.mapbase = res->start;
s->port.type = PORT_CLPS711X;
s->port.fifosize = 16;
+ s->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_CLPS711X_CONSOLE);
s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE;
s->port.uartclk = clk_get_rate(uart_clk);
s->port.ops = &uart_clps711x_ops;
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index de6d02f7abe2..19d5a4cf29a6 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -40,10 +40,6 @@
#include <asm/fs_pd.h>
#include <asm/udbg.h>
-#if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include <linux/kernel.h>
@@ -347,9 +343,7 @@ static void cpm_uart_int_rx(struct uart_port *port)
/* ASSUMPTION: it contains nothing valid */
i = 0;
}
-#ifdef SUPPORT_SYSRQ
port->sysrq = 0;
-#endif
goto error_return;
}
@@ -1204,7 +1198,8 @@ static int cpm_uart_init_port(struct device_node *np,
pinfo->port.uartclk = ppc_proc_freq;
pinfo->port.mapbase = (unsigned long)mem;
pinfo->port.type = PORT_CPM;
- pinfo->port.ops = &cpm_uart_pops,
+ pinfo->port.ops = &cpm_uart_pops;
+ pinfo->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_CPM_CONSOLE);
pinfo->port.iotype = UPIO_MEM;
pinfo->port.fifosize = pinfo->tx_nrfifos * pinfo->tx_fifosize;
spin_lock_init(&pinfo->port.lock);
diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c
index 730da413d8ed..4552742c3859 100644
--- a/drivers/tty/serial/dz.c
+++ b/drivers/tty/serial/dz.c
@@ -29,10 +29,6 @@
#undef DEBUG_DZ
-#if defined(CONFIG_SERIAL_DZ_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <linux/console.h>
@@ -787,6 +783,7 @@ static void __init dz_init_ports(void)
uport->ops = &dz_ops;
uport->line = line;
uport->mapbase = base;
+ uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_DZ_CONSOLE);
}
}
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index d6b5e5463746..2ac87128d7fd 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -1,8 +1,4 @@
// SPDX-License-Identifier: GPL-2.0
-#if defined(CONFIG_SERIAL_EFM32_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
@@ -748,6 +744,7 @@ static int efm32_uart_probe(struct platform_device *pdev)
efm_port->port.type = PORT_EFMUART;
efm_port->port.iotype = UPIO_MEM32;
efm_port->port.fifosize = 2;
+ efm_port->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_EFM32_UART_CONSOLE);
efm_port->port.ops = &efm32_uart_pops;
efm_port->port.flags = UPF_BOOT_AUTOCONF;
diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c
index 205c31a61684..3e28be402aef 100644
--- a/drivers/tty/serial/fsl_linflexuart.c
+++ b/drivers/tty/serial/fsl_linflexuart.c
@@ -6,11 +6,6 @@
* Copyright 2017-2019 NXP
*/
-#if defined(CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE) && \
- defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/console.h>
#include <linux/io.h>
#include <linux/irq.h>
@@ -279,10 +274,8 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id)
if (brk) {
uart_handle_break(sport);
} else {
-#ifdef SUPPORT_SYSRQ
if (uart_handle_sysrq_char(sport, (unsigned char)rx))
continue;
-#endif
tty_insert_flip_char(port, rx, flg);
}
}
@@ -863,6 +856,7 @@ static int linflex_probe(struct platform_device *pdev)
sport->irq = platform_get_irq(pdev, 0);
sport->ops = &linflex_pops;
sport->flags = UPF_BOOT_AUTOCONF;
+ sport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE);
linflex_ports[sport->line] = sport;
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 4e128d19e0ad..91e2805e6441 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -5,10 +5,6 @@
* Copyright 2012-2014 Freescale Semiconductor, Inc.
*/
-#if defined(CONFIG_SERIAL_FSL_LPUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/dma-mapping.h>
@@ -864,9 +860,7 @@ static void lpuart_rxint(struct lpuart_port *sport)
if (sr & UARTSR1_OR)
flg = TTY_OVERRUN;
-#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
-#endif
}
tty_insert_flip_char(port, rx, flg);
@@ -946,9 +940,7 @@ static void lpuart32_rxint(struct lpuart_port *sport)
if (sr & UARTSTAT_OR)
flg = TTY_OVERRUN;
-#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
-#endif
}
tty_insert_flip_char(port, rx, flg);
@@ -2376,7 +2368,9 @@ static int __init lpuart32_early_console_setup(struct earlycon_device *device,
if (!device->port.membase)
return -ENODEV;
- device->port.iotype = UPIO_MEM32BE;
+ if (device->port.iotype != UPIO_MEM32)
+ device->port.iotype = UPIO_MEM32BE;
+
device->con->write = lpuart32_early_write;
return 0;
}
@@ -2396,9 +2390,6 @@ static int __init lpuart32_imx_early_console_setup(struct earlycon_device *devic
OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,imx7ulp-lpuart", lpuart32_imx_early_console_setup);
-OF_EARLYCON_DECLARE(lpuart32, "fsl,imx8qxp-lpuart", lpuart32_imx_early_console_setup);
-EARLYCON_DECLARE(lpuart, lpuart_early_console_setup);
-EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup);
#define LPUART_CONSOLE (&lpuart_console)
#define LPUART32_CONSOLE (&lpuart32_console)
@@ -2461,6 +2452,7 @@ static int lpuart_probe(struct platform_device *pdev)
sport->port.ops = &lpuart32_pops;
else
sport->port.ops = &lpuart_pops;
+ sport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_FSL_LPUART_CONSOLE);
sport->port.flags = UPF_BOOT_AUTOCONF;
if (lpuart_is_32(sport))
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index a9e20e6c63ad..0c6c63166250 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -8,10 +8,6 @@
* Copyright (C) 2004 Pengutronix
*/
-#if defined(CONFIG_SERIAL_IMX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -700,22 +696,33 @@ static void imx_uart_start_tx(struct uart_port *port)
}
}
-static irqreturn_t imx_uart_rtsint(int irq, void *dev_id)
+static irqreturn_t __imx_uart_rtsint(int irq, void *dev_id)
{
struct imx_port *sport = dev_id;
u32 usr1;
- spin_lock(&sport->port.lock);
-
imx_uart_writel(sport, USR1_RTSD, USR1);
usr1 = imx_uart_readl(sport, USR1) & USR1_RTSS;
uart_handle_cts_change(&sport->port, !!usr1);
wake_up_interruptible(&sport->port.state->port.delta_msr_wait);
- spin_unlock(&sport->port.lock);
return IRQ_HANDLED;
}
+static irqreturn_t imx_uart_rtsint(int irq, void *dev_id)
+{
+ struct imx_port *sport = dev_id;
+ irqreturn_t ret;
+
+ spin_lock(&sport->port.lock);
+
+ ret = __imx_uart_rtsint(irq, dev_id);
+
+ spin_unlock(&sport->port.lock);
+
+ return ret;
+}
+
static irqreturn_t imx_uart_txint(int irq, void *dev_id)
{
struct imx_port *sport = dev_id;
@@ -726,14 +733,12 @@ static irqreturn_t imx_uart_txint(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
+static irqreturn_t __imx_uart_rxint(int irq, void *dev_id)
{
struct imx_port *sport = dev_id;
unsigned int rx, flg, ignored = 0;
struct tty_port *port = &sport->port.state->port;
- spin_lock(&sport->port.lock);
-
while (imx_uart_readl(sport, USR2) & USR2_RDR) {
u32 usr2;
@@ -779,9 +784,7 @@ static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
if (rx & URXD_OVRRUN)
flg = TTY_OVERRUN;
-#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
-#endif
}
if (sport->port.ignore_status_mask & URXD_DUMMY_READ)
@@ -792,11 +795,25 @@ static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
}
out:
- spin_unlock(&sport->port.lock);
tty_flip_buffer_push(port);
+
return IRQ_HANDLED;
}
+static irqreturn_t imx_uart_rxint(int irq, void *dev_id)
+{
+ struct imx_port *sport = dev_id;
+ irqreturn_t ret;
+
+ spin_lock(&sport->port.lock);
+
+ ret = __imx_uart_rxint(irq, dev_id);
+
+ spin_unlock(&sport->port.lock);
+
+ return ret;
+}
+
static void imx_uart_clear_rx_errors(struct imx_port *sport);
/*
@@ -855,6 +872,8 @@ static irqreturn_t imx_uart_int(int irq, void *dev_id)
unsigned int usr1, usr2, ucr1, ucr2, ucr3, ucr4;
irqreturn_t ret = IRQ_NONE;
+ spin_lock(&sport->port.lock);
+
usr1 = imx_uart_readl(sport, USR1);
usr2 = imx_uart_readl(sport, USR2);
ucr1 = imx_uart_readl(sport, UCR1);
@@ -888,27 +907,25 @@ static irqreturn_t imx_uart_int(int irq, void *dev_id)
usr2 &= ~USR2_ORE;
if (usr1 & (USR1_RRDY | USR1_AGTIM)) {
- imx_uart_rxint(irq, dev_id);
+ __imx_uart_rxint(irq, dev_id);
ret = IRQ_HANDLED;
}
if ((usr1 & USR1_TRDY) || (usr2 & USR2_TXDC)) {
- imx_uart_txint(irq, dev_id);
+ imx_uart_transmit_buffer(sport);
ret = IRQ_HANDLED;
}
if (usr1 & USR1_DTRD) {
imx_uart_writel(sport, USR1_DTRD, USR1);
- spin_lock(&sport->port.lock);
imx_uart_mctrl_check(sport);
- spin_unlock(&sport->port.lock);
ret = IRQ_HANDLED;
}
if (usr1 & USR1_RTSD) {
- imx_uart_rtsint(irq, dev_id);
+ __imx_uart_rtsint(irq, dev_id);
ret = IRQ_HANDLED;
}
@@ -923,6 +940,8 @@ static irqreturn_t imx_uart_int(int irq, void *dev_id)
ret = IRQ_HANDLED;
}
+ spin_unlock(&sport->port.lock);
+
return ret;
}
@@ -2231,6 +2250,7 @@ static int imx_uart_probe(struct platform_device *pdev)
sport->port.iotype = UPIO_MEM;
sport->port.irq = rxirq;
sport->port.fifosize = 32;
+ sport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_IMX_CONSOLE);
sport->port.ops = &imx_uart_pops;
sport->port.rs485_config = imx_uart_rs485_config;
sport->port.flags = UPF_BOOT_AUTOCONF;
diff --git a/drivers/tty/serial/ip22zilog.c b/drivers/tty/serial/ip22zilog.c
index 8c810733df3d..86fff69d7e7c 100644
--- a/drivers/tty/serial/ip22zilog.c
+++ b/drivers/tty/serial/ip22zilog.c
@@ -38,10 +38,6 @@
#include <asm/sgi/hpc3.h>
#include <asm/sgi/ip22.h>
-#if defined(CONFIG_SERIAL_IP22_ZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include "ip22zilog.h"
@@ -1080,6 +1076,7 @@ static struct uart_driver ip22zilog_reg = {
static void __init ip22zilog_prepare(void)
{
+ unsigned char sysrq_on = IS_ENABLED(CONFIG_SERIAL_IP22_ZILOG_CONSOLE);
struct uart_ip22zilog_port *up;
struct zilog_layout *rp;
int channel, chip;
@@ -1115,6 +1112,7 @@ static void __init ip22zilog_prepare(void)
up[(chip * 2) + 0].port.irq = zilog_irq;
up[(chip * 2) + 0].port.uartclk = ZS_CLOCK;
up[(chip * 2) + 0].port.fifosize = 1;
+ up[(chip * 2) + 0].port.has_sysrq = sysrq_on;
up[(chip * 2) + 0].port.ops = &ip22zilog_pops;
up[(chip * 2) + 0].port.type = PORT_IP22ZILOG;
up[(chip * 2) + 0].port.flags = 0;
@@ -1126,6 +1124,7 @@ static void __init ip22zilog_prepare(void)
up[(chip * 2) + 1].port.irq = zilog_irq;
up[(chip * 2) + 1].port.uartclk = ZS_CLOCK;
up[(chip * 2) + 1].port.fifosize = 1;
+ up[(chip * 2) + 1].port.has_sysrq = sysrq_on;
up[(chip * 2) + 1].port.ops = &ip22zilog_pops;
up[(chip * 2) + 1].port.type = PORT_IP22ZILOG;
up[(chip * 2) + 1].port.line = (chip * 2) + 1;
diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c
index 4029272891f9..5022447afa23 100644
--- a/drivers/tty/serial/kgdb_nmi.c
+++ b/drivers/tty/serial/kgdb_nmi.c
@@ -118,7 +118,7 @@ static int kgdb_nmi_poll_one_knock(void)
int c = -1;
const char *magic = kgdb_nmi_magic;
size_t m = strlen(magic);
- bool printch = 0;
+ bool printch = false;
c = dbg_io_ops->read_char();
if (c == NO_POLL_CHAR)
@@ -130,7 +130,7 @@ static int kgdb_nmi_poll_one_knock(void)
n = (n + 1) % m;
if (!n)
return 1;
- printch = 1;
+ printch = true;
} else {
n = 0;
}
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 164b18372c02..d2c08b760f83 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -5,15 +5,12 @@
* Copyright (C) 2014 Carlo Caione <carlo@caione.org>
*/
-#if defined(CONFIG_SERIAL_MESON_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/of.h>
@@ -76,6 +73,8 @@
#define AML_UART_PORT_OFFSET 6
#define AML_UART_DEV_NAME "ttyAML"
+#define AML_UART_POLL_USEC 5
+#define AML_UART_TIMEOUT_USEC 10000
static struct uart_driver meson_uart_driver;
@@ -427,6 +426,64 @@ static void meson_uart_config_port(struct uart_port *port, int flags)
}
}
+#ifdef CONFIG_CONSOLE_POLL
+/*
+ * Console polling routines for writing and reading from the uart while
+ * in an interrupt or debug context (i.e. kgdb).
+ */
+
+static int meson_uart_poll_get_char(struct uart_port *port)
+{
+ u32 c;
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ if (readl(port->membase + AML_UART_STATUS) & AML_UART_RX_EMPTY)
+ c = NO_POLL_CHAR;
+ else
+ c = readl(port->membase + AML_UART_RFIFO);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ return c;
+}
+
+static void meson_uart_poll_put_char(struct uart_port *port, unsigned char c)
+{
+ unsigned long flags;
+ u32 reg;
+ int ret;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ /* Wait until FIFO is empty or timeout */
+ ret = readl_poll_timeout_atomic(port->membase + AML_UART_STATUS, reg,
+ reg & AML_UART_TX_EMPTY,
+ AML_UART_POLL_USEC,
+ AML_UART_TIMEOUT_USEC);
+ if (ret == -ETIMEDOUT) {
+ dev_err(port->dev, "Timeout waiting for UART TX EMPTY\n");
+ goto out;
+ }
+
+ /* Write the character */
+ writel(c, port->membase + AML_UART_WFIFO);
+
+ /* Wait until FIFO is empty or timeout */
+ ret = readl_poll_timeout_atomic(port->membase + AML_UART_STATUS, reg,
+ reg & AML_UART_TX_EMPTY,
+ AML_UART_POLL_USEC,
+ AML_UART_TIMEOUT_USEC);
+ if (ret == -ETIMEDOUT)
+ dev_err(port->dev, "Timeout waiting for UART TX EMPTY\n");
+
+out:
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
static const struct uart_ops meson_uart_ops = {
.set_mctrl = meson_uart_set_mctrl,
.get_mctrl = meson_uart_get_mctrl,
@@ -442,6 +499,10 @@ static const struct uart_ops meson_uart_ops = {
.request_port = meson_uart_request_port,
.release_port = meson_uart_release_port,
.verify_port = meson_uart_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = meson_uart_poll_get_char,
+ .poll_put_char = meson_uart_poll_put_char,
+#endif
};
#ifdef CONFIG_SERIAL_MESON_CONSOLE
@@ -703,6 +764,7 @@ static int meson_uart_probe(struct platform_device *pdev)
port->mapsize = resource_size(res_mem);
port->irq = res_irq->start;
port->flags = UPF_BOOT_AUTOCONF | UPF_LOW_LATENCY;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MESON_CONSOLE);
port->dev = &pdev->dev;
port->line = pdev->id;
port->type = PORT_MESON;
diff --git a/drivers/tty/serial/milbeaut_usio.c b/drivers/tty/serial/milbeaut_usio.c
index 949ab7efc4fc..8f2cab7f66ad 100644
--- a/drivers/tty/serial/milbeaut_usio.c
+++ b/drivers/tty/serial/milbeaut_usio.c
@@ -3,10 +3,6 @@
* Copyright (C) 2018 Socionext Inc.
*/
-#if defined(CONFIG_SERIAL_MILBEAUT_USIO_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/module.h>
@@ -537,6 +533,7 @@ static int mlb_usio_probe(struct platform_device *pdev)
port->irq = mlb_usio_irq[index][RX];
port->uartclk = clk_get_rate(clk);
port->fifosize = 128;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MILBEAUT_USIO_CONSOLE);
port->iotype = UPIO_MEM32;
port->flags = UPF_BOOT_AUTOCONF | UPF_SPD_VHI;
port->line = index;
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index 3a75ee08d619..af1700445251 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -44,10 +44,6 @@
#include <asm/mpc52xx.h>
#include <asm/mpc52xx_psc.h>
-#if defined(CONFIG_SERIAL_MPC52xx_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
@@ -1382,12 +1378,8 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
ch = psc_ops->read_char(port);
/* Handle sysreq char */
-#ifdef SUPPORT_SYSRQ
- if (uart_handle_sysrq_char(port, ch)) {
- port->sysrq = 0;
+ if (uart_handle_sysrq_char(port, ch))
continue;
- }
-#endif
/* Store it */
@@ -1770,6 +1762,7 @@ static int mpc52xx_uart_of_probe(struct platform_device *op)
spin_lock_init(&port->lock);
port->uartclk = uartclk;
port->fifosize = 512;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MPC52xx_CONSOLE);
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF |
(uart_console(port) ? 0 : UPF_IOREMAP);
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index f6c45a796433..60a9c53fa7cb 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -7,10 +7,6 @@
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
*/
-#if defined(CONFIG_SERIAL_MSM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-# define SUPPORT_SYSRQ
-#endif
-
#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/dma-mapping.h>
@@ -610,7 +606,7 @@ static void msm_start_rx_dma(struct msm_port *msm_port)
UARTDM_RX_SIZE, dma->dir);
ret = dma_mapping_error(uart->dev, dma->phys);
if (ret)
- return;
+ goto sw_mode;
dma->desc = dmaengine_prep_slave_single(dma->chan, dma->phys,
UARTDM_RX_SIZE, DMA_DEV_TO_MEM,
@@ -661,6 +657,22 @@ static void msm_start_rx_dma(struct msm_port *msm_port)
return;
unmap:
dma_unmap_single(uart->dev, dma->phys, UARTDM_RX_SIZE, dma->dir);
+
+sw_mode:
+ /*
+ * Switch from DMA to SW/FIFO mode. After clearing Rx BAM (UARTDM_DMEN),
+ * receiver must be reset.
+ */
+ msm_write(uart, UART_CR_CMD_RESET_RX, UART_CR);
+ msm_write(uart, UART_CR_RX_ENABLE, UART_CR);
+
+ msm_write(uart, UART_CR_CMD_RESET_STALE_INT, UART_CR);
+ msm_write(uart, 0xFFFFFF, UARTDM_DMRX);
+ msm_write(uart, UART_CR_CMD_STALE_EVENT_ENABLE, UART_CR);
+
+ /* Re-enable RX interrupts */
+ msm_port->imr |= (UART_IMR_RXLEV | UART_IMR_RXSTALE);
+ msm_write(uart, msm_port->imr, UART_IMR);
}
static void msm_stop_rx(struct uart_port *port)
@@ -1810,6 +1822,7 @@ static int msm_serial_probe(struct platform_device *pdev)
if (unlikely(irq < 0))
return -ENXIO;
port->irq = irq;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MSM_CONSOLE);
platform_set_drvdata(pdev, port);
diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index fc58a004bef4..47ab280f553b 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -25,11 +25,7 @@
#include <asm/irq.h>
#include <asm/parisc-device.h>
-#if defined(CONFIG_SERIAL_MUX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#include <linux/sysrq.h>
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#define MUX_OFFSET 0x800
@@ -483,6 +479,7 @@ static int __init mux_probe(struct parisc_device *dev)
port->ops = &mux_pops;
port->flags = UPF_BOOT_AUTOCONF;
port->line = port_cnt;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_MUX_CONSOLE);
/* The port->timeout needs to match what is present in
* uart_wait_until_sent in serial_core.c. Otherwise
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index e34525970682..b4f835e7de23 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -12,10 +12,6 @@
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
-#if defined(CONFIG_SERIAL_MXS_AUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
@@ -1693,6 +1689,7 @@ static int mxs_auart_probe(struct platform_device *pdev)
s->port.fifosize = MXS_AUART_FIFO_SIZE;
s->port.uartclk = clk_get_rate(s->clk);
s->port.type = PORT_IMX;
+ s->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_MXS_AUART_CONSOLE);
mxs_init_regs(s);
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 6420ae581a80..48017cec7f2f 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -16,10 +16,6 @@
* this driver as required for the omap-platform.
*/
-#if defined(CONFIG_SERIAL_OMAP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/init.h>
#include <linux/console.h>
@@ -493,10 +489,13 @@ static unsigned int check_modem_status(struct uart_omap_port *up)
static void serial_omap_rlsi(struct uart_omap_port *up, unsigned int lsr)
{
unsigned int flag;
- unsigned char ch = 0;
+ /*
+ * Read one data character out to avoid stalling the receiver according
+ * to the table 23-246 of the omap4 TRM.
+ */
if (likely(lsr & UART_LSR_DR))
- ch = serial_in(up, UART_RX);
+ serial_in(up, UART_RX);
up->port.icount.rx++;
flag = TTY_NORMAL;
@@ -1680,6 +1679,7 @@ static int serial_omap_probe(struct platform_device *pdev)
up->port.regshift = 2;
up->port.fifosize = 64;
up->port.ops = &serial_omap_pops;
+ up->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_OMAP_CONSOLE);
if (pdev->dev.of_node)
ret = of_alias_get_id(pdev->dev.of_node, "serial");
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index c16234bca78f..0a96217dba67 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -2,9 +2,6 @@
/*
*Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
*/
-#if defined(CONFIG_SERIAL_PCH_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
#include <linux/kernel.h>
#include <linux/serial_reg.h>
#include <linux/slab.h>
@@ -587,12 +584,8 @@ static int pch_uart_hal_read(struct eg20t_port *priv, unsigned char *buf,
if (uart_handle_break(port))
continue;
}
-#ifdef SUPPORT_SYSRQ
- if (port->sysrq) {
- if (uart_handle_sysrq_char(port, rbr))
- continue;
- }
-#endif
+ if (uart_handle_sysrq_char(port, rbr))
+ continue;
buf[i++] = rbr;
}
@@ -1796,6 +1789,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
priv->port.flags = UPF_BOOT_AUTOCONF;
priv->port.fifosize = fifosize;
priv->port.line = board->line_no;
+ priv->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_PCH_UART_CONSOLE);
priv->trigger = PCH_UART_HAL_TRIGGER_M;
snprintf(priv->irq_name, IRQ_NAME_SIZE,
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index bcb5bf70534e..ba65a3bbd72a 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -61,10 +61,6 @@
#define of_machine_is_compatible(x) (0)
#endif
-#if defined (CONFIG_SERIAL_PMACZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial.h>
#include <linux/serial_core.h>
@@ -1721,6 +1717,7 @@ static int __init pmz_init_port(struct uart_pmac_port *uap)
uap->control_reg = uap->port.membase;
uap->data_reg = uap->control_reg + 4;
uap->port_type = 0;
+ uap->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_PMACZILOG_CONSOLE);
pmz_convert_to_zs(uap, CS8, 0, 9600);
diff --git a/drivers/tty/serial/pnx8xxx_uart.c b/drivers/tty/serial/pnx8xxx_uart.c
index 223a9499104e..972d94e8d32b 100644
--- a/drivers/tty/serial/pnx8xxx_uart.c
+++ b/drivers/tty/serial/pnx8xxx_uart.c
@@ -10,10 +10,6 @@
* Copyright (C) 2000 Deep Blue Solutions Ltd.
*/
-#if defined(CONFIG_SERIAL_PNX8XXX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -220,9 +216,7 @@ static void pnx8xxx_rx_chars(struct pnx8xxx_port *sport)
else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE))
flg = TTY_FRAME;
-#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
-#endif
}
if (uart_handle_sysrq_char(&sport->port, ch))
@@ -800,6 +794,7 @@ static int pnx8xxx_serial_probe(struct platform_device *pdev)
if (pnx8xxx_ports[i].port.mapbase != res->start)
continue;
+ pnx8xxx_ports[i].port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_PNX8XXX_CONSOLE);
pnx8xxx_ports[i].port.dev = &pdev->dev;
uart_add_one_port(&pnx8xxx_reg, &pnx8xxx_ports[i].port);
platform_set_drvdata(pdev, &pnx8xxx_ports[i]);
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 4932b674f7ef..41319ef96fa6 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -19,10 +19,6 @@
*/
-#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/console.h>
@@ -879,6 +875,7 @@ static int serial_pxa_probe(struct platform_device *dev)
sport->port.dev = &dev->dev;
sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
sport->port.uartclk = clk_get_rate(sport->clk);
+ sport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_PXA_CONSOLE);
ret = serial_pxa_probe_dt(dev, sport);
if (ret > 0)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index ff63728a95f4..191abb18fc2a 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1,10 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2017-2018, The Linux foundation. All rights reserved.
-#if defined(CONFIG_SERIAL_QCOM_GENI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-# define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/io.h>
@@ -14,6 +10,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/pm_wakeirq.h>
#include <linux/qcom-geni-se.h>
#include <linux/serial.h>
@@ -92,7 +89,11 @@
#define DEF_TX_WM 2
#define DEF_FIFO_WIDTH_BITS 32
#define UART_RX_WM 2
-#define MAX_LOOPBACK_CFG 3
+
+/* SE_UART_LOOPBACK_CFG */
+#define RX_TX_SORTED BIT(0)
+#define CTS_RTS_SORTED BIT(1)
+#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED)
#ifdef CONFIG_CONSOLE_POLL
#define CONSOLE_RX_BYTES_PW 1
@@ -103,7 +104,7 @@
struct qcom_geni_serial_port {
struct uart_port uport;
struct geni_se se;
- char name[20];
+ const char *name;
u32 tx_fifo_depth;
u32 tx_fifo_width;
u32 rx_fifo_depth;
@@ -164,30 +165,6 @@ static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = {
},
};
-static ssize_t loopback_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
-
- return snprintf(buf, sizeof(u32), "%d\n", port->loopback);
-}
-
-static ssize_t loopback_store(struct device *dev,
- struct device_attribute *attr, const char *buf,
- size_t size)
-{
- struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
- u32 loopback;
-
- if (kstrtoint(buf, 0, &loopback) || loopback > MAX_LOOPBACK_CFG) {
- dev_err(dev, "Invalid input\n");
- return -EINVAL;
- }
- port->loopback = loopback;
- return size;
-}
-static DEVICE_ATTR_RW(loopback);
-
static struct qcom_geni_serial_port qcom_geni_console_port = {
.uport = {
.iotype = UPIO_MEM,
@@ -237,10 +214,14 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport,
unsigned int mctrl)
{
u32 uart_manual_rfr = 0;
+ struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
if (uart_console(uport))
return;
+ if (mctrl & TIOCM_LOOP)
+ port->loopback = RX_TX_CTS_RTS_SORTED;
+
if (!(mctrl & TIOCM_RTS))
uart_manual_rfr = UART_MANUAL_RFR_EN | UART_RFR_NOT_READY;
writel(uart_manual_rfr, uport->membase + SE_UART_MANUAL_RFR);
@@ -757,15 +738,6 @@ out_write_wakeup:
uart_write_wakeup(uport);
}
-static irqreturn_t qcom_geni_serial_wakeup_isr(int isr, void *dev)
-{
- struct uart_port *uport = dev;
-
- pm_wakeup_event(uport->dev, 2000);
-
- return IRQ_HANDLED;
-}
-
static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
{
u32 m_irq_en;
@@ -1302,50 +1274,57 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS;
port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;
- scnprintf(port->name, sizeof(port->name), "qcom_geni_serial_%s%d",
- (uart_console(uport) ? "console" : "uart"), uport->line);
+ port->name = devm_kasprintf(uport->dev, GFP_KERNEL,
+ "qcom_geni_serial_%s%d",
+ uart_console(uport) ? "console" : "uart", uport->line);
+ if (!port->name)
+ return -ENOMEM;
+
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
uport->irq = irq;
+ uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE);
+
+ if (!console)
+ port->wakeup_irq = platform_get_irq_optional(pdev, 1);
+
+ uport->private_data = drv;
+ platform_set_drvdata(pdev, port);
+ port->handle_rx = console ? handle_rx_console : handle_rx_uart;
+
+ ret = uart_add_one_port(drv, uport);
+ if (ret)
+ return ret;
irq_set_status_flags(uport->irq, IRQ_NOAUTOEN);
ret = devm_request_irq(uport->dev, uport->irq, qcom_geni_serial_isr,
IRQF_TRIGGER_HIGH, port->name, uport);
if (ret) {
dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret);
+ uart_remove_one_port(drv, uport);
return ret;
}
- if (!console) {
- port->wakeup_irq = platform_get_irq(pdev, 1);
- if (port->wakeup_irq < 0) {
- dev_err(&pdev->dev, "Failed to get wakeup IRQ %d\n",
- port->wakeup_irq);
- } else {
- irq_set_status_flags(port->wakeup_irq, IRQ_NOAUTOEN);
- ret = devm_request_irq(uport->dev, port->wakeup_irq,
- qcom_geni_serial_wakeup_isr,
- IRQF_TRIGGER_FALLING, "uart_wakeup", uport);
- if (ret) {
- dev_err(uport->dev, "Failed to register wakeup IRQ ret %d\n",
- ret);
- return ret;
- }
-
- device_init_wakeup(&pdev->dev, true);
- ret = dev_pm_set_wake_irq(&pdev->dev, port->wakeup_irq);
- if (unlikely(ret))
- dev_err(uport->dev, "%s:Failed to set IRQ wake:%d\n",
- __func__, ret);
+ /*
+ * Set pm_runtime status as ACTIVE so that wakeup_irq gets
+ * enabled/disabled from dev_pm_arm_wake_irq during system
+ * suspend/resume respectively.
+ */
+ pm_runtime_set_active(&pdev->dev);
+
+ if (port->wakeup_irq > 0) {
+ device_init_wakeup(&pdev->dev, true);
+ ret = dev_pm_set_dedicated_wake_irq(&pdev->dev,
+ port->wakeup_irq);
+ if (ret) {
+ device_init_wakeup(&pdev->dev, false);
+ uart_remove_one_port(drv, uport);
+ return ret;
}
}
- uport->private_data = drv;
- platform_set_drvdata(pdev, port);
- port->handle_rx = console ? handle_rx_console : handle_rx_uart;
- if (!console)
- device_create_file(uport->dev, &dev_attr_loopback);
- return uart_add_one_port(drv, uport);
+
+ return 0;
}
static int qcom_geni_serial_remove(struct platform_device *pdev)
@@ -1353,7 +1332,10 @@ static int qcom_geni_serial_remove(struct platform_device *pdev)
struct qcom_geni_serial_port *port = platform_get_drvdata(pdev);
struct uart_driver *drv = port->uport.private_data;
+ dev_pm_clear_wake_irq(&pdev->dev);
+ device_init_wakeup(&pdev->dev, false);
uart_remove_one_port(drv, &port->uport);
+
return 0;
}
@@ -1362,12 +1344,7 @@ static int __maybe_unused qcom_geni_serial_sys_suspend(struct device *dev)
struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
struct uart_port *uport = &port->uport;
- uart_suspend_port(uport->private_data, uport);
-
- if (port->wakeup_irq > 0)
- enable_irq(port->wakeup_irq);
-
- return 0;
+ return uart_suspend_port(uport->private_data, uport);
}
static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev)
@@ -1375,9 +1352,6 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev)
struct qcom_geni_serial_port *port = dev_get_drvdata(dev);
struct uart_port *uport = &port->uport;
- if (port->wakeup_irq > 0)
- disable_irq(port->wakeup_irq);
-
return uart_resume_port(uport->private_data, uport);
}
diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
index 8e618129e65c..75c2a22895f9 100644
--- a/drivers/tty/serial/sa1100.c
+++ b/drivers/tty/serial/sa1100.c
@@ -7,10 +7,6 @@
* Copyright (C) 2000 Deep Blue Solutions Ltd.
*/
-#if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -214,9 +210,7 @@ sa1100_rx_chars(struct sa1100_port *sport)
else if (status & UTSR1_TO_SM(UTSR1_FRE))
flg = TTY_FRAME;
-#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
-#endif
}
if (uart_handle_sysrq_char(&sport->port, ch))
@@ -860,6 +854,7 @@ static int sa1100_serial_resume(struct platform_device *dev)
static int sa1100_serial_add_one_port(struct sa1100_port *sport, struct platform_device *dev)
{
sport->port.dev = &dev->dev;
+ sport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SA1100_CONSOLE);
// mctrl_gpio_init() requires that the GPIO driver supports interrupts,
// but we need to support GPIO drivers for hardware that has no such
diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h
deleted file mode 100644
index f93022113f59..000000000000
--- a/drivers/tty/serial/samsung.h
+++ /dev/null
@@ -1,147 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#ifndef __SAMSUNG_H
-#define __SAMSUNG_H
-
-/*
- * Driver for Samsung SoC onboard UARTs.
- *
- * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
- * http://armlinux.simtec.co.uk/
-*/
-
-#include <linux/dmaengine.h>
-
-struct s3c24xx_uart_info {
- char *name;
- unsigned int type;
- unsigned int fifosize;
- unsigned long rx_fifomask;
- unsigned long rx_fifoshift;
- unsigned long rx_fifofull;
- unsigned long tx_fifomask;
- unsigned long tx_fifoshift;
- unsigned long tx_fifofull;
- unsigned int def_clk_sel;
- unsigned long num_clks;
- unsigned long clksel_mask;
- unsigned long clksel_shift;
-
- /* uart port features */
-
- unsigned int has_divslot:1;
-
- /* uart controls */
- int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *);
-};
-
-struct s3c24xx_serial_drv_data {
- struct s3c24xx_uart_info *info;
- struct s3c2410_uartcfg *def_cfg;
- unsigned int fifosize[CONFIG_SERIAL_SAMSUNG_UARTS];
-};
-
-struct s3c24xx_uart_dma {
- unsigned int rx_chan_id;
- unsigned int tx_chan_id;
-
- struct dma_slave_config rx_conf;
- struct dma_slave_config tx_conf;
-
- struct dma_chan *rx_chan;
- struct dma_chan *tx_chan;
-
- dma_addr_t rx_addr;
- dma_addr_t tx_addr;
-
- dma_cookie_t rx_cookie;
- dma_cookie_t tx_cookie;
-
- char *rx_buf;
-
- dma_addr_t tx_transfer_addr;
-
- size_t rx_size;
- size_t tx_size;
-
- struct dma_async_tx_descriptor *tx_desc;
- struct dma_async_tx_descriptor *rx_desc;
-
- int tx_bytes_requested;
- int rx_bytes_requested;
-};
-
-struct s3c24xx_uart_port {
- unsigned char rx_claimed;
- unsigned char tx_claimed;
- unsigned int pm_level;
- unsigned long baudclk_rate;
- unsigned int min_dma_size;
-
- unsigned int rx_irq;
- unsigned int tx_irq;
-
- unsigned int tx_in_progress;
- unsigned int tx_mode;
- unsigned int rx_mode;
-
- struct s3c24xx_uart_info *info;
- struct clk *clk;
- struct clk *baudclk;
- struct uart_port port;
- struct s3c24xx_serial_drv_data *drv_data;
-
- /* reference to platform data */
- struct s3c2410_uartcfg *cfg;
-
- struct s3c24xx_uart_dma *dma;
-
-#ifdef CONFIG_ARM_S3C24XX_CPUFREQ
- struct notifier_block freq_transition;
-#endif
-};
-
-/* conversion functions */
-
-#define s3c24xx_dev_to_port(__dev) dev_get_drvdata(__dev)
-
-/* register access controls */
-
-#define portaddr(port, reg) ((port)->membase + (reg))
-#define portaddrl(port, reg) \
- ((unsigned long *)(unsigned long)((port)->membase + (reg)))
-
-#define rd_regb(port, reg) (readb_relaxed(portaddr(port, reg)))
-#define rd_regl(port, reg) (readl_relaxed(portaddr(port, reg)))
-
-#define wr_regb(port, reg, val) writeb_relaxed(val, portaddr(port, reg))
-#define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg))
-
-/* Byte-order aware bit setting/clearing functions. */
-
-static inline void s3c24xx_set_bit(struct uart_port *port, int idx,
- unsigned int reg)
-{
- unsigned long flags;
- u32 val;
-
- local_irq_save(flags);
- val = rd_regl(port, reg);
- val |= (1 << idx);
- wr_regl(port, reg, val);
- local_irq_restore(flags);
-}
-
-static inline void s3c24xx_clear_bit(struct uart_port *port, int idx,
- unsigned int reg)
-{
- unsigned long flags;
- u32 val;
-
- local_irq_save(flags);
- val = rd_regl(port, reg);
- val &= ~(1 << idx);
- wr_regl(port, reg, val);
- local_irq_restore(flags);
-}
-
-#endif
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 83fd51607741..73f951d65b93 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -4,7 +4,7 @@
*
* Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
-*/
+ */
/* Hote on 2410 error handling
*
@@ -19,11 +19,7 @@
* and change the policy on BREAK
*
* BJD, 04-Nov-2004
-*/
-
-#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
+ */
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
@@ -44,33 +40,8 @@
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/of.h>
-
#include <asm/irq.h>
-#include "samsung.h"
-
-#if defined(CONFIG_SERIAL_SAMSUNG_DEBUG) && \
- !defined(MODULE)
-
-extern void printascii(const char *);
-
-__printf(1, 2)
-static void dbg(const char *fmt, ...)
-{
- va_list va;
- char buff[256];
-
- va_start(va, fmt);
- vscnprintf(buff, sizeof(buff), fmt, va);
- va_end(va);
-
- printascii(buff);
-}
-
-#else
-#define dbg(fmt, ...) do { if (0) no_printk(fmt, ##__VA_ARGS__); } while (0)
-#endif
-
/* UART name and device definitions */
#define S3C24XX_SERIAL_NAME "ttySAC"
@@ -81,14 +52,142 @@ static void dbg(const char *fmt, ...)
#define S3C24XX_TX_DMA 2
#define S3C24XX_RX_PIO 1
#define S3C24XX_RX_DMA 2
-/* macros to change one thing to another */
-
-#define tx_enabled(port) ((port)->unused[0])
-#define rx_enabled(port) ((port)->unused[1])
/* flag to ignore all characters coming in */
#define RXSTAT_DUMMY_READ (0x10000000)
+struct s3c24xx_uart_info {
+ char *name;
+ unsigned int type;
+ unsigned int fifosize;
+ unsigned long rx_fifomask;
+ unsigned long rx_fifoshift;
+ unsigned long rx_fifofull;
+ unsigned long tx_fifomask;
+ unsigned long tx_fifoshift;
+ unsigned long tx_fifofull;
+ unsigned int def_clk_sel;
+ unsigned long num_clks;
+ unsigned long clksel_mask;
+ unsigned long clksel_shift;
+
+ /* uart port features */
+
+ unsigned int has_divslot:1;
+};
+
+struct s3c24xx_serial_drv_data {
+ struct s3c24xx_uart_info *info;
+ struct s3c2410_uartcfg *def_cfg;
+ unsigned int fifosize[CONFIG_SERIAL_SAMSUNG_UARTS];
+};
+
+struct s3c24xx_uart_dma {
+ unsigned int rx_chan_id;
+ unsigned int tx_chan_id;
+
+ struct dma_slave_config rx_conf;
+ struct dma_slave_config tx_conf;
+
+ struct dma_chan *rx_chan;
+ struct dma_chan *tx_chan;
+
+ dma_addr_t rx_addr;
+ dma_addr_t tx_addr;
+
+ dma_cookie_t rx_cookie;
+ dma_cookie_t tx_cookie;
+
+ char *rx_buf;
+
+ dma_addr_t tx_transfer_addr;
+
+ size_t rx_size;
+ size_t tx_size;
+
+ struct dma_async_tx_descriptor *tx_desc;
+ struct dma_async_tx_descriptor *rx_desc;
+
+ int tx_bytes_requested;
+ int rx_bytes_requested;
+};
+
+struct s3c24xx_uart_port {
+ unsigned char rx_claimed;
+ unsigned char tx_claimed;
+ unsigned char rx_enabled;
+ unsigned char tx_enabled;
+ unsigned int pm_level;
+ unsigned long baudclk_rate;
+ unsigned int min_dma_size;
+
+ unsigned int rx_irq;
+ unsigned int tx_irq;
+
+ unsigned int tx_in_progress;
+ unsigned int tx_mode;
+ unsigned int rx_mode;
+
+ struct s3c24xx_uart_info *info;
+ struct clk *clk;
+ struct clk *baudclk;
+ struct uart_port port;
+ struct s3c24xx_serial_drv_data *drv_data;
+
+ /* reference to platform data */
+ struct s3c2410_uartcfg *cfg;
+
+ struct s3c24xx_uart_dma *dma;
+
+#ifdef CONFIG_ARM_S3C24XX_CPUFREQ
+ struct notifier_block freq_transition;
+#endif
+};
+
+/* conversion functions */
+
+#define s3c24xx_dev_to_port(__dev) dev_get_drvdata(__dev)
+
+/* register access controls */
+
+#define portaddr(port, reg) ((port)->membase + (reg))
+#define portaddrl(port, reg) \
+ ((unsigned long *)(unsigned long)((port)->membase + (reg)))
+
+#define rd_regb(port, reg) (readb_relaxed(portaddr(port, reg)))
+#define rd_regl(port, reg) (readl_relaxed(portaddr(port, reg)))
+
+#define wr_regb(port, reg, val) writeb_relaxed(val, portaddr(port, reg))
+#define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg))
+
+/* Byte-order aware bit setting/clearing functions. */
+
+static inline void s3c24xx_set_bit(struct uart_port *port, int idx,
+ unsigned int reg)
+{
+ unsigned long flags;
+ u32 val;
+
+ local_irq_save(flags);
+ val = rd_regl(port, reg);
+ val |= (1 << idx);
+ wr_regl(port, reg, val);
+ local_irq_restore(flags);
+}
+
+static inline void s3c24xx_clear_bit(struct uart_port *port, int idx,
+ unsigned int reg)
+{
+ unsigned long flags;
+ u32 val;
+
+ local_irq_save(flags);
+ val = rd_regl(port, reg);
+ val &= ~(1 << idx);
+ wr_regl(port, reg, val);
+ local_irq_restore(flags);
+}
+
static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port)
{
return container_of(port, struct s3c24xx_uart_port, port);
@@ -118,6 +217,7 @@ static int s3c24xx_serial_has_interrupt_mask(struct uart_port *port)
static void s3c24xx_serial_rx_enable(struct uart_port *port)
{
+ struct s3c24xx_uart_port *ourport = to_ourport(port);
unsigned long flags;
unsigned int ucon, ufcon;
int count = 10000;
@@ -135,12 +235,13 @@ static void s3c24xx_serial_rx_enable(struct uart_port *port)
ucon |= S3C2410_UCON_RXIRQMODE;
wr_regl(port, S3C2410_UCON, ucon);
- rx_enabled(port) = 1;
+ ourport->rx_enabled = 1;
spin_unlock_irqrestore(&port->lock, flags);
}
static void s3c24xx_serial_rx_disable(struct uart_port *port)
{
+ struct s3c24xx_uart_port *ourport = to_ourport(port);
unsigned long flags;
unsigned int ucon;
@@ -150,7 +251,7 @@ static void s3c24xx_serial_rx_disable(struct uart_port *port)
ucon &= ~S3C2410_UCON_RXIRQMODE;
wr_regl(port, S3C2410_UCON, ucon);
- rx_enabled(port) = 0;
+ ourport->rx_enabled = 0;
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -162,7 +263,7 @@ static void s3c24xx_serial_stop_tx(struct uart_port *port)
struct dma_tx_state state;
int count;
- if (!tx_enabled(port))
+ if (!ourport->tx_enabled)
return;
if (s3c24xx_serial_has_interrupt_mask(port))
@@ -182,7 +283,7 @@ static void s3c24xx_serial_stop_tx(struct uart_port *port)
port->icount.tx += count;
}
- tx_enabled(port) = 0;
+ ourport->tx_enabled = 0;
ourport->tx_in_progress = 0;
if (port->flags & UPF_CONS_FLOW)
@@ -340,11 +441,11 @@ static void s3c24xx_serial_start_tx(struct uart_port *port)
struct s3c24xx_uart_port *ourport = to_ourport(port);
struct circ_buf *xmit = &port->state->xmit;
- if (!tx_enabled(port)) {
+ if (!ourport->tx_enabled) {
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
- tx_enabled(port) = 1;
+ ourport->tx_enabled = 1;
if (!ourport->dma || !ourport->dma->tx_chan)
s3c24xx_serial_start_tx_pio(ourport);
}
@@ -389,14 +490,14 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port)
enum dma_status dma_status;
unsigned int received;
- if (rx_enabled(port)) {
- dbg("s3c24xx_serial_stop_rx: port=%p\n", port);
+ if (ourport->rx_enabled) {
+ dev_dbg(port->dev, "stopping rx\n");
if (s3c24xx_serial_has_interrupt_mask(port))
s3c24xx_set_bit(port, S3C64XX_UINTM_RXD,
S3C64XX_UINTM);
else
disable_irq_nosync(ourport->rx_irq);
- rx_enabled(port) = 0;
+ ourport->rx_enabled = 0;
}
if (dma && dma->rx_chan) {
dmaengine_pause(dma->tx_chan);
@@ -546,7 +647,7 @@ static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport);
static irqreturn_t s3c24xx_serial_rx_chars_dma(void *dev_id)
{
- unsigned int utrstat, ufstat, received;
+ unsigned int utrstat, received;
struct s3c24xx_uart_port *ourport = dev_id;
struct uart_port *port = &ourport->port;
struct s3c24xx_uart_dma *dma = ourport->dma;
@@ -556,7 +657,7 @@ static irqreturn_t s3c24xx_serial_rx_chars_dma(void *dev_id)
struct dma_tx_state state;
utrstat = rd_regl(port, S3C2410_UTRSTAT);
- ufstat = rd_regl(port, S3C2410_UFSTAT);
+ rd_regl(port, S3C2410_UFSTAT);
spin_lock_irqsave(&port->lock, flags);
@@ -618,9 +719,9 @@ static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport)
if (port->flags & UPF_CONS_FLOW) {
int txe = s3c24xx_serial_txempty_nofifo(port);
- if (rx_enabled(port)) {
+ if (ourport->rx_enabled) {
if (!txe) {
- rx_enabled(port) = 0;
+ ourport->rx_enabled = 0;
continue;
}
} else {
@@ -628,7 +729,7 @@ static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport)
ufcon = rd_regl(port, S3C2410_UFCON);
ufcon |= S3C2410_UFCON_RESETRX;
wr_regl(port, S3C2410_UFCON, ufcon);
- rx_enabled(port) = 1;
+ ourport->rx_enabled = 1;
return;
}
continue;
@@ -641,12 +742,13 @@ static void s3c24xx_serial_rx_drain_fifo(struct s3c24xx_uart_port *ourport)
port->icount.rx++;
if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) {
- dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n",
- ch, uerstat);
+ dev_dbg(port->dev,
+ "rxerr: port ch=0x%02x, rxs=0x%08x\n",
+ ch, uerstat);
/* check for break */
if (uerstat & S3C2410_UERSTAT_BREAK) {
- dbg("break!\n");
+ dev_dbg(port->dev, "break!\n");
port->icount.brk++;
if (uart_handle_break(port))
continue; /* Ignore character */
@@ -732,7 +834,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
/* if there isn't anything more to transmit, or the uart is now
* stopped, disable the uart and exit
- */
+ */
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
s3c24xx_serial_stop_tx(port);
@@ -978,7 +1080,7 @@ static void s3c24xx_serial_shutdown(struct uart_port *port)
if (ourport->tx_claimed) {
if (!s3c24xx_serial_has_interrupt_mask(port))
free_irq(ourport->tx_irq, ourport);
- tx_enabled(port) = 0;
+ ourport->tx_enabled = 0;
ourport->tx_claimed = 0;
ourport->tx_mode = 0;
}
@@ -987,7 +1089,7 @@ static void s3c24xx_serial_shutdown(struct uart_port *port)
if (!s3c24xx_serial_has_interrupt_mask(port))
free_irq(ourport->rx_irq, ourport);
ourport->rx_claimed = 0;
- rx_enabled(port) = 0;
+ ourport->rx_enabled = 0;
}
/* Clear pending interrupts and mask all interrupts */
@@ -1009,10 +1111,7 @@ static int s3c24xx_serial_startup(struct uart_port *port)
struct s3c24xx_uart_port *ourport = to_ourport(port);
int ret;
- dbg("s3c24xx_serial_startup: port=%p (%08llx,%p)\n",
- port, (unsigned long long)port->mapbase, port->membase);
-
- rx_enabled(port) = 1;
+ ourport->rx_enabled = 1;
ret = request_irq(ourport->rx_irq, s3c24xx_serial_rx_chars, 0,
s3c24xx_serial_portname(port), ourport);
@@ -1024,9 +1123,9 @@ static int s3c24xx_serial_startup(struct uart_port *port)
ourport->rx_claimed = 1;
- dbg("requesting tx irq...\n");
+ dev_dbg(port->dev, "requesting tx irq...\n");
- tx_enabled(port) = 1;
+ ourport->tx_enabled = 1;
ret = request_irq(ourport->tx_irq, s3c24xx_serial_tx_chars, 0,
s3c24xx_serial_portname(port), ourport);
@@ -1038,10 +1137,9 @@ static int s3c24xx_serial_startup(struct uart_port *port)
ourport->tx_claimed = 1;
- dbg("s3c24xx_serial_startup ok\n");
-
/* the port reset code should have done the correct
- * register setup for the port controls */
+ * register setup for the port controls
+ */
return ret;
@@ -1057,9 +1155,6 @@ static int s3c64xx_serial_startup(struct uart_port *port)
unsigned int ufcon;
int ret;
- dbg("s3c64xx_serial_startup: port=%p (%08llx,%p)\n",
- port, (unsigned long long)port->mapbase, port->membase);
-
wr_regl(port, S3C64XX_UINTM, 0xf);
if (ourport->dma) {
ret = s3c24xx_serial_request_dma(ourport);
@@ -1077,9 +1172,9 @@ static int s3c64xx_serial_startup(struct uart_port *port)
}
/* For compatibility with s3c24xx Soc's */
- rx_enabled(port) = 1;
+ ourport->rx_enabled = 1;
ourport->rx_claimed = 1;
- tx_enabled(port) = 0;
+ ourport->tx_enabled = 0;
ourport->tx_claimed = 1;
spin_lock_irqsave(&port->lock, flags);
@@ -1097,7 +1192,6 @@ static int s3c64xx_serial_startup(struct uart_port *port)
/* Enable Rx Interrupt */
s3c24xx_clear_bit(port, S3C64XX_UINTM_RXD, S3C64XX_UINTM);
- dbg("s3c64xx_serial_startup ok\n");
return ret;
}
@@ -1145,7 +1239,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
* baud clocks (and the resultant actual baud rates) and then tries to
* pick the closest one and select that.
*
-*/
+ */
#define MAX_CLK_NAME_LENGTH 15
@@ -1315,29 +1409,30 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
if (cfg->has_fracval) {
udivslot = (div & 15);
- dbg("fracval = %04x\n", udivslot);
+ dev_dbg(port->dev, "fracval = %04x\n", udivslot);
} else {
udivslot = udivslot_table[div & 15];
- dbg("udivslot = %04x (div %d)\n", udivslot, div & 15);
+ dev_dbg(port->dev, "udivslot = %04x (div %d)\n",
+ udivslot, div & 15);
}
}
switch (termios->c_cflag & CSIZE) {
case CS5:
- dbg("config: 5bits/char\n");
+ dev_dbg(port->dev, "config: 5bits/char\n");
ulcon = S3C2410_LCON_CS5;
break;
case CS6:
- dbg("config: 6bits/char\n");
+ dev_dbg(port->dev, "config: 6bits/char\n");
ulcon = S3C2410_LCON_CS6;
break;
case CS7:
- dbg("config: 7bits/char\n");
+ dev_dbg(port->dev, "config: 7bits/char\n");
ulcon = S3C2410_LCON_CS7;
break;
case CS8:
default:
- dbg("config: 8bits/char\n");
+ dev_dbg(port->dev, "config: 8bits/char\n");
ulcon = S3C2410_LCON_CS8;
break;
}
@@ -1359,8 +1454,9 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
spin_lock_irqsave(&port->lock, flags);
- dbg("setting ulcon to %08x, brddiv to %d, udivslot %08x\n",
- ulcon, quot, udivslot);
+ dev_dbg(port->dev,
+ "setting ulcon to %08x, brddiv to %d, udivslot %08x\n",
+ ulcon, quot, udivslot);
wr_regl(port, S3C2410_ULCON, ulcon);
wr_regl(port, S3C2410_UBRDIV, quot);
@@ -1381,10 +1477,11 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
if (ourport->info->has_divslot)
wr_regl(port, S3C2443_DIVSLOT, udivslot);
- dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n",
- rd_regl(port, S3C2410_ULCON),
- rd_regl(port, S3C2410_UCON),
- rd_regl(port, S3C2410_UFCON));
+ dev_dbg(port->dev,
+ "uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n",
+ rd_regl(port, S3C2410_ULCON),
+ rd_regl(port, S3C2410_UCON),
+ rd_regl(port, S3C2410_UFCON));
/*
* Update the per-port timeout.
@@ -1442,6 +1539,7 @@ static void s3c24xx_serial_release_port(struct uart_port *port)
static int s3c24xx_serial_request_port(struct uart_port *port)
{
const char *name = s3c24xx_serial_portname(port);
+
return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY;
}
@@ -1583,7 +1681,7 @@ s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
/* s3c24xx_serial_resetport
*
* reset the fifos and other the settings.
-*/
+ */
static void s3c24xx_serial_resetport(struct uart_port *port,
struct s3c2410_uartcfg *cfg)
@@ -1637,7 +1735,8 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
if (val == CPUFREQ_PRECHANGE) {
/* we should really shut the port down whilst the
- * frequency change is in progress. */
+ * frequency change is in progress.
+ */
} else if (val == CPUFREQ_POSTCHANGE) {
struct ktermios *termios;
@@ -1743,8 +1842,6 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
struct resource *res;
int ret;
- dbg("s3c24xx_serial_init_port: port=%p, platdev=%p\n", port, platdev);
-
if (platdev == NULL)
return -ENODEV;
@@ -1761,7 +1858,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
port->uartclk = 1;
if (cfg->uart_flags & UPF_CONS_FLOW) {
- dbg("s3c24xx_serial_init_port: enabling flow control\n");
+ dev_dbg(port->dev, "enabling flow control\n");
port->flags |= UPF_CONS_FLOW;
}
@@ -1773,7 +1870,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
return -EINVAL;
}
- dbg("resource %pR)\n", res);
+ dev_dbg(port->dev, "resource %pR)\n", res);
port->membase = devm_ioremap(port->dev, res->start, resource_size(res));
if (!port->membase) {
@@ -1835,9 +1932,9 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
wr_regl(port, S3C64XX_UINTSP, 0xf);
}
- dbg("port: map=%pa, mem=%p, irq=%d (%d,%d), clock=%u\n",
- &port->mapbase, port->membase, port->irq,
- ourport->rx_irq, ourport->tx_irq, port->uartclk);
+ dev_dbg(port->dev, "port: map=%pa, mem=%p, irq=%d (%d,%d), clock=%u\n",
+ &port->mapbase, port->membase, port->irq,
+ ourport->rx_irq, ourport->tx_irq, port->uartclk);
/* reset the fifos (and setup the uart) */
s3c24xx_serial_resetport(port, cfg);
@@ -1851,7 +1948,10 @@ err:
/* Device driver serial port probe */
+#ifdef CONFIG_OF
static const struct of_device_id s3c24xx_uart_dt_match[];
+#endif
+
static int probe_index;
static inline struct s3c24xx_serial_drv_data *s3c24xx_get_driver_data(
@@ -1860,6 +1960,7 @@ static inline struct s3c24xx_serial_drv_data *s3c24xx_get_driver_data(
#ifdef CONFIG_OF
if (pdev->dev.of_node) {
const struct of_device_id *match;
+
match = of_match_node(s3c24xx_uart_dt_match, pdev->dev.of_node);
return (struct s3c24xx_serial_drv_data *)match->data;
}
@@ -1881,8 +1982,6 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
index = ret;
}
- dbg("s3c24xx_serial_probe(%p) %d\n", pdev, index);
-
if (index >= ARRAY_SIZE(s3c24xx_serial_ports)) {
dev_err(&pdev->dev, "serial%d out of range\n", index);
return -EINVAL;
@@ -1909,6 +2008,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
ourport->port.fifosize = ourport->drv_data->fifosize[index];
else if (ourport->info->fifosize)
ourport->port.fifosize = ourport->info->fifosize;
+ ourport->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SAMSUNG_CONSOLE);
/*
* DMA transfers must be aligned at least to cache line size,
@@ -1917,7 +2017,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
ourport->min_dma_size = max_t(int, ourport->port.fifosize,
dma_get_cache_alignment());
- dbg("%s: initialising port %p...\n", __func__, ourport);
+ dev_dbg(&pdev->dev, "%s: initialising port %p...\n", __func__, ourport);
ret = s3c24xx_serial_init_port(ourport, pdev);
if (ret < 0)
@@ -1931,7 +2031,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
}
}
- dbg("%s: adding port\n", __func__);
+ dev_dbg(&pdev->dev, "%s: adding port\n", __func__);
uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
platform_set_drvdata(pdev, &ourport->port);
@@ -2008,9 +2108,10 @@ static int s3c24xx_serial_resume_noirq(struct device *dev)
/* restore IRQ mask */
if (s3c24xx_serial_has_interrupt_mask(port)) {
unsigned int uintm = 0xf;
- if (tx_enabled(port))
+
+ if (ourport->tx_enabled)
uintm &= ~S3C64XX_UINTM_TXD_MSK;
- if (rx_enabled(port))
+ if (ourport->rx_enabled)
uintm &= ~S3C64XX_UINTM_RXD_MSK;
clk_prepare_enable(ourport->clk);
if (!IS_ERR(ourport->baudclk))
@@ -2143,10 +2244,6 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud,
ucon = rd_regl(port, S3C2410_UCON);
ubrdiv = rd_regl(port, S3C2410_UBRDIV);
- dbg("s3c24xx_serial_get_options: port=%p\n"
- "registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n",
- port, ulcon, ucon, ubrdiv);
-
if (s3c24xx_port_configured(ucon)) {
switch (ulcon & S3C2410_LCON_CSMASK) {
case S3C2410_LCON_CS5:
@@ -2190,7 +2287,7 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud,
rate = 1;
*baud = rate / (16 * (ubrdiv + 1));
- dbg("calculated baud %d\n", *baud);
+ dev_dbg(port->dev, "calculated baud %d\n", *baud);
}
}
@@ -2204,9 +2301,6 @@ s3c24xx_serial_console_setup(struct console *co, char *options)
int parity = 'n';
int flow = 'n';
- dbg("s3c24xx_serial_console_setup: co=%p (%d), %s\n",
- co, co->index, options);
-
/* is this a valid port */
if (co->index == -1 || co->index >= CONFIG_SERIAL_SAMSUNG_UARTS)
@@ -2221,8 +2315,6 @@ s3c24xx_serial_console_setup(struct console *co, char *options)
cons_uart = port;
- dbg("s3c24xx_serial_console_setup: port=%p (%d)\n", port, co->index);
-
/*
* Check whether an invalid uart number has been specified, and
* if so, search for the first available port that does have
@@ -2233,7 +2325,7 @@ s3c24xx_serial_console_setup(struct console *co, char *options)
else
s3c24xx_serial_get_options(port, &baud, &parity, &bits);
- dbg("s3c24xx_serial_console_setup: baud %d\n", baud);
+ dev_dbg(port->dev, "baud %d\n", baud);
return uart_set_options(port, co, baud, parity, bits, flow);
}
@@ -2523,7 +2615,8 @@ static void samsung_early_putc(struct uart_port *port, int c)
writeb(c, port->membase + S3C2410_UTXH);
}
-static void samsung_early_write(struct console *con, const char *s, unsigned n)
+static void samsung_early_write(struct console *con, const char *s,
+ unsigned int n)
{
struct earlycon_device *dev = con->data;
@@ -2572,7 +2665,7 @@ OF_EARLYCON_DECLARE(s3c2440, "samsung,s3c2440-uart",
OF_EARLYCON_DECLARE(s3c6400, "samsung,s3c6400-uart",
s3c2440_early_console_setup);
-/* S5PV210, EXYNOS */
+/* S5PV210, Exynos */
static struct samsung_early_console_data s5pv210_early_console_data = {
.txfull_mask = S5PV210_UFSTAT_TXFULL,
};
diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index 7c99340a3d66..bd5e7e9938ce 100644
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -15,10 +15,6 @@
* "BCM1250/BCM1125/BCM1125H User Manual", Broadcom Corporation
*/
-#if defined(CONFIG_SERIAL_SB1250_DUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/compiler.h>
#include <linux/console.h>
#include <linux/delay.h>
@@ -813,6 +809,7 @@ static void __init sbd_probe_duarts(void)
uport->ops = &sbd_ops;
uport->line = line;
uport->mapbase = SBD_CHANREGS(line);
+ uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_SB1250_DUART_CONSOLE);
}
}
}
diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c
index d2b77aae42ae..10cc16a71f26 100644
--- a/drivers/tty/serial/sccnxp.c
+++ b/drivers/tty/serial/sccnxp.c
@@ -7,10 +7,6 @@
* Based on sc26xx.c, by Thomas Bogendörfer (tsbogend@alpha.franken.de)
*/
-#if defined(CONFIG_SERIAL_SCCNXP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
@@ -1000,6 +996,7 @@ static int sccnxp_probe(struct platform_device *pdev)
s->port[i].regshift = s->pdata.reg_shift;
s->port[i].uartclk = uartclk;
s->port[i].ops = &sccnxp_ops;
+ s->port[i].has_sysrq = IS_ENABLED(CONFIG_SERIAL_SCCNXP_CONSOLE);
uart_add_one_port(&s->uart, &s->port[i]);
/* Set direction to input */
if (s->chip->flags & SCCNXP_HAVE_IO)
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index b6ace6290e23..33034b852a51 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -141,6 +141,7 @@ struct tegra_uart_port {
int configured_rate;
bool use_rx_pio;
bool use_tx_pio;
+ bool rx_dma_active;
};
static void tegra_uart_start_next_tx(struct tegra_uart_port *tup);
@@ -533,11 +534,12 @@ static int tegra_uart_start_tx_dma(struct tegra_uart_port *tup,
struct circ_buf *xmit = &tup->uport.state->xmit;
dma_addr_t tx_phys_addr;
- dma_sync_single_for_device(tup->uport.dev, tup->tx_dma_buf_phys,
- UART_XMIT_SIZE, DMA_TO_DEVICE);
-
tup->tx_bytes = count & ~(0xF);
tx_phys_addr = tup->tx_dma_buf_phys + xmit->tail;
+
+ dma_sync_single_for_device(tup->uport.dev, tx_phys_addr,
+ tup->tx_bytes, DMA_TO_DEVICE);
+
tup->tx_dma_desc = dmaengine_prep_slave_single(tup->tx_dma_chan,
tx_phys_addr, tup->tx_bytes, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT);
@@ -679,7 +681,7 @@ static void tegra_uart_copy_rx_to_tty(struct tegra_uart_port *tup,
return;
dma_sync_single_for_cpu(tup->uport.dev, tup->rx_dma_buf_phys,
- TEGRA_UART_RX_DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
+ count, DMA_FROM_DEVICE);
copied = tty_insert_flip_string(tty,
((unsigned char *)(tup->rx_dma_buf_virt)), count);
if (copied != count) {
@@ -687,7 +689,7 @@ static void tegra_uart_copy_rx_to_tty(struct tegra_uart_port *tup,
dev_err(tup->uport.dev, "RxData copy to tty layer failed\n");
}
dma_sync_single_for_device(tup->uport.dev, tup->rx_dma_buf_phys,
- TEGRA_UART_RX_DMA_BUFFER_SIZE, DMA_TO_DEVICE);
+ count, DMA_TO_DEVICE);
}
static void tegra_uart_rx_buffer_push(struct tegra_uart_port *tup,
@@ -731,6 +733,7 @@ static void tegra_uart_rx_dma_complete(void *args)
if (tup->rts_active)
set_rts(tup, false);
+ tup->rx_dma_active = false;
tegra_uart_rx_buffer_push(tup, 0);
tegra_uart_start_rx_dma(tup);
@@ -742,18 +745,27 @@ done:
spin_unlock_irqrestore(&u->lock, flags);
}
-static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup)
+static void tegra_uart_terminate_rx_dma(struct tegra_uart_port *tup)
{
struct dma_tx_state state;
- /* Deactivate flow control to stop sender */
- if (tup->rts_active)
- set_rts(tup, false);
+ if (!tup->rx_dma_active)
+ return;
dmaengine_terminate_all(tup->rx_dma_chan);
dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state);
+
tegra_uart_rx_buffer_push(tup, state.residue);
- tegra_uart_start_rx_dma(tup);
+ tup->rx_dma_active = false;
+}
+
+static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup)
+{
+ /* Deactivate flow control to stop sender */
+ if (tup->rts_active)
+ set_rts(tup, false);
+
+ tegra_uart_terminate_rx_dma(tup);
if (tup->rts_active)
set_rts(tup, true);
@@ -763,6 +775,9 @@ static int tegra_uart_start_rx_dma(struct tegra_uart_port *tup)
{
unsigned int count = TEGRA_UART_RX_DMA_BUFFER_SIZE;
+ if (tup->rx_dma_active)
+ return 0;
+
tup->rx_dma_desc = dmaengine_prep_slave_single(tup->rx_dma_chan,
tup->rx_dma_buf_phys, count, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT);
@@ -771,10 +786,9 @@ static int tegra_uart_start_rx_dma(struct tegra_uart_port *tup)
return -EIO;
}
+ tup->rx_dma_active = true;
tup->rx_dma_desc->callback = tegra_uart_rx_dma_complete;
tup->rx_dma_desc->callback_param = tup;
- dma_sync_single_for_device(tup->uport.dev, tup->rx_dma_buf_phys,
- count, DMA_TO_DEVICE);
tup->rx_bytes_requested = count;
tup->rx_cookie = dmaengine_submit(tup->rx_dma_desc);
dma_async_issue_pending(tup->rx_dma_chan);
@@ -820,6 +834,7 @@ static irqreturn_t tegra_uart_isr(int irq, void *data)
struct uart_port *u = &tup->uport;
unsigned long iir;
unsigned long ier;
+ bool is_rx_start = false;
bool is_rx_int = false;
unsigned long flags;
@@ -832,10 +847,12 @@ static irqreturn_t tegra_uart_isr(int irq, void *data)
if (tup->rx_in_progress) {
ier = tup->ier_shadow;
ier |= (UART_IER_RLSI | UART_IER_RTOIE |
- TEGRA_UART_IER_EORD);
+ TEGRA_UART_IER_EORD | UART_IER_RDI);
tup->ier_shadow = ier;
tegra_uart_write(tup, ier, UART_IER);
}
+ } else if (is_rx_start) {
+ tegra_uart_start_rx_dma(tup);
}
spin_unlock_irqrestore(&u->lock, flags);
return IRQ_HANDLED;
@@ -854,17 +871,23 @@ static irqreturn_t tegra_uart_isr(int irq, void *data)
case 4: /* End of data */
case 6: /* Rx timeout */
- case 2: /* Receive */
- if (!tup->use_rx_pio && !is_rx_int) {
- is_rx_int = true;
+ if (!tup->use_rx_pio) {
+ is_rx_int = tup->rx_in_progress;
/* Disable Rx interrupts */
ier = tup->ier_shadow;
- ier |= UART_IER_RDI;
- tegra_uart_write(tup, ier, UART_IER);
ier &= ~(UART_IER_RDI | UART_IER_RLSI |
UART_IER_RTOIE | TEGRA_UART_IER_EORD);
tup->ier_shadow = ier;
tegra_uart_write(tup, ier, UART_IER);
+ break;
+ }
+ /* Fall through */
+ case 2: /* Receive */
+ if (!tup->use_rx_pio) {
+ is_rx_start = tup->rx_in_progress;
+ tup->ier_shadow &= ~UART_IER_RDI;
+ tegra_uart_write(tup, tup->ier_shadow,
+ UART_IER);
} else {
do_handle_rx_pio(tup);
}
@@ -886,7 +909,6 @@ static void tegra_uart_stop_rx(struct uart_port *u)
{
struct tegra_uart_port *tup = to_tegra_uport(u);
struct tty_port *port = &tup->uport.state->port;
- struct dma_tx_state state;
unsigned long ier;
if (tup->rts_active)
@@ -903,13 +925,11 @@ static void tegra_uart_stop_rx(struct uart_port *u)
tup->ier_shadow = ier;
tegra_uart_write(tup, ier, UART_IER);
tup->rx_in_progress = 0;
- if (tup->rx_dma_chan && !tup->use_rx_pio) {
- dmaengine_terminate_all(tup->rx_dma_chan);
- dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state);
- tegra_uart_rx_buffer_push(tup, state.residue);
- } else {
+
+ if (!tup->use_rx_pio)
+ tegra_uart_terminate_rx_dma(tup);
+ else
tegra_uart_handle_rx_pio(tup, port);
- }
}
static void tegra_uart_hw_deinit(struct tegra_uart_port *tup)
@@ -1052,12 +1072,6 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup)
tup->lcr_shadow = TEGRA_UART_DEFAULT_LSR;
tup->fcr_shadow |= UART_FCR_DMA_SELECT;
tegra_uart_write(tup, tup->fcr_shadow, UART_FCR);
-
- ret = tegra_uart_start_rx_dma(tup);
- if (ret < 0) {
- dev_err(tup->uport.dev, "Not able to start Rx DMA\n");
- return ret;
- }
} else {
tegra_uart_write(tup, tup->fcr_shadow, UART_FCR);
}
@@ -1067,10 +1081,6 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup)
* Enable IE_RXS for the receive status interrupts like line errros.
* Enable IE_RX_TIMEOUT to get the bytes which cannot be DMA'd.
*
- * If using DMA mode, enable EORD instead of receive interrupt which
- * will interrupt after the UART is done with the receive instead of
- * the interrupt when the FIFO "threshold" is reached.
- *
* EORD is different interrupt than RX_TIMEOUT - RX_TIMEOUT occurs when
* the DATA is sitting in the FIFO and couldn't be transferred to the
* DMA as the DMA size alignment (4 bytes) is not met. EORD will be
@@ -1081,11 +1091,14 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup)
* both the EORD as well as RX_TIMEOUT - SW sees RX_TIMEOUT first
* then the EORD.
*/
+ tup->ier_shadow = UART_IER_RLSI | UART_IER_RTOIE | UART_IER_RDI;
+
+ /*
+ * If using DMA mode, enable EORD interrupt to notify about RX
+ * completion.
+ */
if (!tup->use_rx_pio)
- tup->ier_shadow = UART_IER_RLSI | UART_IER_RTOIE |
- TEGRA_UART_IER_EORD;
- else
- tup->ier_shadow = UART_IER_RLSI | UART_IER_RTOIE | UART_IER_RDI;
+ tup->ier_shadow |= TEGRA_UART_IER_EORD;
tegra_uart_write(tup, tup->ier_shadow, UART_IER);
return 0;
@@ -1140,6 +1153,9 @@ static int tegra_uart_dma_channel_allocate(struct tegra_uart_port *tup,
dma_release_channel(dma_chan);
return -ENOMEM;
}
+ dma_sync_single_for_device(tup->uport.dev, dma_phys,
+ TEGRA_UART_RX_DMA_BUFFER_SIZE,
+ DMA_TO_DEVICE);
dma_sconfig.src_addr = tup->uport.mapbase;
dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma_sconfig.src_maxburst = tup->cdata->max_dma_burst_bytes;
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 7c2782785736..76e506ee335c 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2603,6 +2603,7 @@ struct tty_driver *uart_console_device(struct console *co, int *index)
*index = co->index;
return p->tty_driver;
}
+EXPORT_SYMBOL_GPL(uart_console_device);
static ssize_t uart_get_attr_uartclk(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -3081,6 +3082,89 @@ void uart_insert_char(struct uart_port *port, unsigned int status,
}
EXPORT_SYMBOL_GPL(uart_insert_char);
+int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
+{
+ if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL))
+ return 0;
+
+ if (!port->has_sysrq || !port->sysrq)
+ return 0;
+
+ if (ch && time_before(jiffies, port->sysrq)) {
+ handle_sysrq(ch);
+ port->sysrq = 0;
+ return 1;
+ }
+ port->sysrq = 0;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uart_handle_sysrq_char);
+
+int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch)
+{
+ if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL))
+ return 0;
+
+ if (!port->has_sysrq || !port->sysrq)
+ return 0;
+
+ if (ch && time_before(jiffies, port->sysrq)) {
+ port->sysrq_ch = ch;
+ port->sysrq = 0;
+ return 1;
+ }
+ port->sysrq = 0;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uart_prepare_sysrq_char);
+
+void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags)
+{
+ int sysrq_ch;
+
+ if (!port->has_sysrq) {
+ spin_unlock_irqrestore(&port->lock, irqflags);
+ return;
+ }
+
+ sysrq_ch = port->sysrq_ch;
+ port->sysrq_ch = 0;
+
+ spin_unlock_irqrestore(&port->lock, irqflags);
+
+ if (sysrq_ch)
+ handle_sysrq(sysrq_ch);
+}
+EXPORT_SYMBOL_GPL(uart_unlock_and_check_sysrq);
+
+/*
+ * We do the SysRQ and SAK checking like this...
+ */
+int uart_handle_break(struct uart_port *port)
+{
+ struct uart_state *state = port->state;
+
+ if (port->handle_break)
+ port->handle_break(port);
+
+ if (port->has_sysrq) {
+ if (port->cons && port->cons->index == port->line) {
+ if (!port->sysrq) {
+ port->sysrq = jiffies + HZ*5;
+ return 1;
+ }
+ port->sysrq = 0;
+ }
+ }
+
+ if (port->flags & UPF_SAK)
+ do_SAK(state->port.tty);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uart_handle_break);
+
EXPORT_SYMBOL(uart_write_wakeup);
EXPORT_SYMBOL(uart_register_driver);
EXPORT_SYMBOL(uart_unregister_driver);
diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
index d22ccb32aa9b..b4d89e31730e 100644
--- a/drivers/tty/serial/serial_txx9.c
+++ b/drivers/tty/serial/serial_txx9.c
@@ -12,10 +12,6 @@
* Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
*/
-#if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
@@ -1095,6 +1091,7 @@ static int serial_txx9_probe(struct platform_device *dev)
port.flags = p->flags;
port.mapbase = p->mapbase;
port.dev = &dev->dev;
+ port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_TXX9_CONSOLE);
ret = serial_txx9_register_port(&port);
if (ret < 0) {
dev_err(&dev->dev, "unable to register port at index %d "
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 87ca6294de0e..c073aa7001c4 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -15,10 +15,6 @@
* Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003).
* Removed SH7300 support (Jul 2007).
*/
-#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#undef DEBUG
#include <linux/clk.h>
@@ -2887,6 +2883,7 @@ static int sci_init_single(struct platform_device *dev,
port->ops = &sci_uart_ops;
port->iotype = UPIO_MEM;
port->line = index;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_SH_SCI_CONSOLE);
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (res == NULL)
@@ -3015,12 +3012,9 @@ static void serial_console_write(struct console *co, const char *s,
unsigned long flags;
int locked = 1;
-#if defined(SUPPORT_SYSRQ)
if (port->sysrq)
locked = 0;
- else
-#endif
- if (oops_in_progress)
+ else if (oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
index f60a59d9bf27..3d3c70634589 100644
--- a/drivers/tty/serial/sprd_serial.c
+++ b/drivers/tty/serial/sprd_serial.c
@@ -3,10 +3,6 @@
* Copyright (C) 2012-2015 Spreadtrum Communications Inc.
*/
-#if defined(CONFIG_SERIAL_SPRD_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/delay.h>
@@ -1230,6 +1226,7 @@ static int sprd_probe(struct platform_device *pdev)
up->fifosize = SPRD_FIFO_SIZE;
up->ops = &serial_sprd_ops;
up->flags = UPF_BOOT_AUTOCONF;
+ up->has_sysrq = IS_ENABLED(CONFIG_SERIAL_SPRD_CONSOLE);
ret = sprd_clk_init(up);
if (ret)
diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
index 7971997cdead..e7048515a79c 100644
--- a/drivers/tty/serial/st-asc.c
+++ b/drivers/tty/serial/st-asc.c
@@ -5,10 +5,6 @@
* Copyright (C) 2003-2013 STMicroelectronics (R&D) Limited
*/
-#if defined(CONFIG_SERIAL_ST_ASC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/module.h>
#include <linux/serial.h>
#include <linux/console.h>
@@ -508,7 +504,6 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct asc_port *ascport = to_asc_port(port);
- struct device_node *np = port->dev->of_node;
struct gpio_desc *gpiod;
unsigned int baud;
u32 ctrl_val;
@@ -570,13 +565,12 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios,
pinctrl_select_state(ascport->pinctrl,
ascport->states[NO_HW_FLOWCTRL]);
- gpiod = devm_fwnode_get_gpiod_from_child(port->dev,
- "rts",
- &np->fwnode,
- GPIOD_OUT_LOW,
- np->name);
- if (!IS_ERR(gpiod))
+ gpiod = devm_gpiod_get(port->dev, "rts", GPIOD_OUT_LOW);
+ if (!IS_ERR(gpiod)) {
+ gpiod_set_consumer_name(gpiod,
+ port->dev->of_node->name);
ascport->rts = gpiod;
+ }
}
}
@@ -730,6 +724,7 @@ static int asc_init_port(struct asc_port *ascport,
port->fifosize = ASC_FIFO_SIZE;
port->dev = &pdev->dev;
port->irq = platform_get_irq(pdev, 0);
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_ST_ASC_CONSOLE);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
port->membase = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 2f72514d63ed..5e93e8d40f59 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -8,10 +8,6 @@
* Inspired by st-asc.c from STMicroelectronics (c)
*/
-#if defined(CONFIG_SERIAL_STM32_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/delay.h>
@@ -926,6 +922,7 @@ static int stm32_init_port(struct stm32_port *stm32port,
port->ops = &stm32_uart_ops;
port->dev = &pdev->dev;
port->fifosize = stm32port->info->cfg.fifosize;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_STM32_CONSOLE);
ret = platform_get_irq(pdev, 0);
if (ret <= 0)
diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c
index f8503f8fc44e..eafada8fb6fa 100644
--- a/drivers/tty/serial/sunhv.c
+++ b/drivers/tty/serial/sunhv.c
@@ -25,10 +25,6 @@
#include <asm/irq.h>
#include <asm/setup.h>
-#if defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include <linux/sunserialcore.h>
@@ -552,6 +548,7 @@ static int hv_probe(struct platform_device *op)
sunhv_port = port;
+ port->has_sysrq = 1;
port->line = 0;
port->ops = &sunhv_pops;
port->type = PORT_SUNHV;
diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index 72131b5e132e..1eb703c980e0 100644
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -40,10 +40,6 @@
#include <asm/prom.h>
#include <asm/setup.h>
-#if defined(CONFIG_SERIAL_SUNSAB_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include <linux/sunserialcore.h>
@@ -985,6 +981,7 @@ static int sunsab_init_one(struct uart_sunsab_port *up,
up->port.fifosize = SAB82532_XMIT_FIFO_SIZE;
up->port.iotype = UPIO_MEM;
+ up->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SUNSAB_CONSOLE);
writeb(SAB82532_IPC_IC_ACT_LOW, &up->regs->w.ipc);
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 4db6aaa330b2..8ce9a7a256e5 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -44,10 +44,6 @@
#include <asm/prom.h>
#include <asm/setup.h>
-#if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include <linux/sunserialcore.h>
@@ -1475,6 +1471,7 @@ static int su_probe(struct platform_device *op)
up->port.type = PORT_UNKNOWN;
up->port.uartclk = (SU_BASE_BAUD * 16);
+ up->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SUNSU_CONSOLE);
err = 0;
if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) {
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index bc7af8b08a72..103ab8c556e7 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -40,10 +40,6 @@
#include <asm/prom.h>
#include <asm/setup.h>
-#if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/serial_core.h>
#include <linux/sunserialcore.h>
@@ -1444,6 +1440,7 @@ static int zs_probe(struct platform_device *op)
up[0].port.line = (inst * 2) + 0;
up[0].port.dev = &op->dev;
up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A;
+ up[0].port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SUNZILOG_CONSOLE);
if (keyboard_mouse)
up[0].flags |= SUNZILOG_FLAG_CONS_KEYB;
sunzilog_init_hw(&up[0]);
@@ -1461,6 +1458,7 @@ static int zs_probe(struct platform_device *op)
up[1].port.line = (inst * 2) + 1;
up[1].port.dev = &op->dev;
up[1].flags |= 0;
+ up[1].port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_SUNZILOG_CONSOLE);
if (keyboard_mouse)
up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE;
sunzilog_init_hw(&up[1]);
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index a0555ae2b1ef..2e151a4c222b 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -332,8 +332,6 @@ static int qe_uart_tx_pump(struct uart_qe_port *qe_port)
struct uart_port *port = &qe_port->port;
struct circ_buf *xmit = &port->state->xmit;
- bdp = qe_port->rx_cur;
-
/* Handle xon/xoff */
if (port->x_char) {
/* Pick next descriptor and fill from buffer */
@@ -551,9 +549,7 @@ handle_error:
/* Overrun does not affect the current character ! */
if (status & BD_SC_OV)
tty_insert_flip_char(tport, 0, TTY_OVERRUN);
-#ifdef SUPPORT_SYSRQ
port->sysrq = 0;
-#endif
goto error_return;
}
diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c
index 6d106e33f842..eeb4b6568776 100644
--- a/drivers/tty/serial/vr41xx_siu.c
+++ b/drivers/tty/serial/vr41xx_siu.c
@@ -7,10 +7,6 @@
* Based on drivers/serial/8250.c, by Russell King.
*/
-#if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/console.h>
#include <linux/errno.h>
#include <linux/init.h>
@@ -869,6 +865,7 @@ static int siu_probe(struct platform_device *dev)
port = &siu_uart_ports[i];
port->ops = &siu_uart_ops;
port->dev = &dev->dev;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_VR41XX_CONSOLE);
retval = uart_add_one_port(&siu_uart_driver, port);
if (retval < 0) {
diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 3d58e9b34553..764e992438b2 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -7,10 +7,6 @@
* Author: Robert Love <rlove@google.com>
*/
-#if defined(CONFIG_SERIAL_VT8500_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-# define SUPPORT_SYSRQ
-#endif
-
#include <linux/hrtimer.h>
#include <linux/delay.h>
#include <linux/io.h>
@@ -703,6 +699,7 @@ static int vt8500_serial_probe(struct platform_device *pdev)
vt8500_port->uart.line = port;
vt8500_port->uart.dev = &pdev->dev;
vt8500_port->uart.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
+ vt8500_port->uart.has_sysrq = IS_ENABLED(CONFIG_SERIAL_VT8500_CONSOLE);
/* Serial core uses the magic "16" everywhere - adjust for it */
vt8500_port->uart.uartclk = 16 * clk_get_rate(vt8500_port->clk) /
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 4e55bc327a54..98db9dc168ff 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -9,10 +9,6 @@
* in the code.
*/
-#if defined(CONFIG_SERIAL_XILINX_PS_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/platform_device.h>
#include <linux/serial.h>
#include <linux/console.h>
@@ -158,6 +154,16 @@ MODULE_PARM_DESC(rx_timeout, "Rx timeout, 1-255");
#define CDNS_UART_MODEMCR_DTR 0x00000001 /* Data Terminal Ready */
/*
+ * Modem Status register:
+ * The read/write Modem Status register reports the interface with the modem
+ * or data set, or a peripheral device emulating a modem.
+ */
+#define CDNS_UART_MODEMSR_DCD BIT(7) /* Data Carrier Detect */
+#define CDNS_UART_MODEMSR_RI BIT(6) /* Ting Indicator */
+#define CDNS_UART_MODEMSR_DSR BIT(5) /* Data Set Ready */
+#define CDNS_UART_MODEMSR_CTS BIT(4) /* Clear To Send */
+
+/*
* Channel Status Register:
* The channel status register (CSR) is provided to enable the control logic
* to monitor the status of bits in the channel interrupt status register,
@@ -684,7 +690,7 @@ static void cdns_uart_break_ctl(struct uart_port *port, int ctl)
static void cdns_uart_set_termios(struct uart_port *port,
struct ktermios *termios, struct ktermios *old)
{
- unsigned int cval = 0;
+ u32 cval = 0;
unsigned int baud, minbaud, maxbaud;
unsigned long flags;
unsigned int ctrl_reg, mode_reg, val;
@@ -805,6 +811,13 @@ static void cdns_uart_set_termios(struct uart_port *port,
cval |= mode_reg & 1;
writel(cval, port->membase + CDNS_UART_MR);
+ cval = readl(port->membase + CDNS_UART_MODEMCR);
+ if (termios->c_cflag & CRTSCTS)
+ cval |= CDNS_UART_MODEMCR_FCM;
+ else
+ cval &= ~CDNS_UART_MODEMCR_FCM;
+ writel(cval, port->membase + CDNS_UART_MODEMCR);
+
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -1007,12 +1020,24 @@ static void cdns_uart_config_port(struct uart_port *port, int flags)
*/
static unsigned int cdns_uart_get_mctrl(struct uart_port *port)
{
+ u32 val;
+ unsigned int mctrl = 0;
struct cdns_uart *cdns_uart_data = port->private_data;
if (cdns_uart_data->cts_override)
- return 0;
-
- return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+ return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+
+ val = readl(port->membase + CDNS_UART_MODEMSR);
+ if (val & CDNS_UART_MODEMSR_CTS)
+ mctrl |= TIOCM_CTS;
+ if (val & CDNS_UART_MODEMSR_DSR)
+ mctrl |= TIOCM_DSR;
+ if (val & CDNS_UART_MODEMSR_RI)
+ mctrl |= TIOCM_RNG;
+ if (val & CDNS_UART_MODEMSR_DCD)
+ mctrl |= TIOCM_CAR;
+
+ return mctrl;
}
static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
@@ -1027,12 +1052,13 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
val = readl(port->membase + CDNS_UART_MODEMCR);
mode_reg = readl(port->membase + CDNS_UART_MR);
- val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR |
- CDNS_UART_MODEMCR_FCM);
+ val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR);
mode_reg &= ~CDNS_UART_MR_CHMODE_MASK;
- if (mctrl & TIOCM_RTS || mctrl & TIOCM_DTR)
- val |= CDNS_UART_MODEMCR_FCM;
+ if (mctrl & TIOCM_RTS)
+ val |= CDNS_UART_MODEMCR_RTS;
+ if (mctrl & TIOCM_DTR)
+ val |= CDNS_UART_MODEMCR_DTR;
if (mctrl & TIOCM_LOOP)
mode_reg |= CDNS_UART_MR_CHMODE_L_LOOP;
else
@@ -1634,6 +1660,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
port->flags = UPF_BOOT_AUTOCONF;
port->ops = &cdns_uart_ops;
port->fifosize = CDNS_UART_FIFO_SIZE;
+ port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_XILINX_PS_UART_CONSOLE);
/*
* Register the port.
diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c
index 89154ac4c577..4b4f604646a7 100644
--- a/drivers/tty/serial/zs.c
+++ b/drivers/tty/serial/zs.c
@@ -44,10 +44,6 @@
* complicated and prevents the use of some automatic modes of operation.
*/
-#if defined(CONFIG_SERIAL_ZS_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
#include <linux/bug.h>
#include <linux/console.h>
#include <linux/delay.h>
@@ -1106,6 +1102,7 @@ static int __init zs_probe_sccs(void)
zport->scc = &zs_sccs[chip];
zport->clk_mode = 16;
+ uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_ZS_CONSOLE);
uport->irq = zs_parms.irq[chip];
uport->uartclk = ZS_CLOCK;
uport->fifosize = 1;
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 5759b6c5b3e2..b794177ccfb9 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -1334,10 +1334,10 @@ static void throttle(struct tty_struct * tty)
DBGINFO(("%s throttle\n", info->device_name));
if (I_IXOFF(tty))
send_xchar(tty, STOP_CHAR(tty));
- if (C_CRTSCTS(tty)) {
+ if (C_CRTSCTS(tty)) {
spin_lock_irqsave(&info->lock,flags);
info->signals &= ~SerialSignal_RTS;
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
}
@@ -1359,10 +1359,10 @@ static void unthrottle(struct tty_struct * tty)
else
send_xchar(tty, START_CHAR(tty));
}
- if (C_CRTSCTS(tty)) {
+ if (C_CRTSCTS(tty)) {
spin_lock_irqsave(&info->lock,flags);
info->signals |= SerialSignal_RTS;
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
}
@@ -2098,7 +2098,7 @@ static void isr_rxdata(struct slgt_info *info)
if (desc_complete(info->rbufs[i])) {
/* all buffers full */
rx_stop(info);
- info->rx_restart = 1;
+ info->rx_restart = true;
continue;
}
info->rbufs[i].buf[count++] = (unsigned char)reg;
@@ -2560,8 +2560,8 @@ static void change_params(struct slgt_info *info)
info->read_status_mask = IRQ_RXOVER;
if (I_INPCK(info->port.tty))
info->read_status_mask |= MASK_PARITY | MASK_FRAMING;
- if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
- info->read_status_mask |= MASK_BREAK;
+ if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+ info->read_status_mask |= MASK_BREAK;
if (I_IGNPAR(info->port.tty))
info->ignore_status_mask |= MASK_PARITY | MASK_FRAMING;
if (I_IGNBRK(info->port.tty)) {
@@ -3192,7 +3192,7 @@ static int tiocmset(struct tty_struct *tty,
info->signals &= ~SerialSignal_DTR;
spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
return 0;
}
@@ -3203,7 +3203,7 @@ static int carrier_raised(struct tty_port *port)
struct slgt_info *info = container_of(port, struct slgt_info, port);
spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
+ get_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
return (info->signals & SerialSignal_DCD) ? 1 : 0;
}
@@ -3218,7 +3218,7 @@ static void dtr_rts(struct tty_port *port, int on)
info->signals |= SerialSignal_RTS | SerialSignal_DTR;
else
info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 7446b03fef02..33ff2dbb6650 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -1453,10 +1453,10 @@ static void throttle(struct tty_struct * tty)
if (I_IXOFF(tty))
send_xchar(tty, STOP_CHAR(tty));
- if (C_CRTSCTS(tty)) {
+ if (C_CRTSCTS(tty)) {
spin_lock_irqsave(&info->lock,flags);
info->serial_signals &= ~SerialSignal_RTS;
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
}
@@ -1482,10 +1482,10 @@ static void unthrottle(struct tty_struct * tty)
send_xchar(tty, START_CHAR(tty));
}
- if (C_CRTSCTS(tty)) {
+ if (C_CRTSCTS(tty)) {
spin_lock_irqsave(&info->lock,flags);
info->serial_signals |= SerialSignal_RTS;
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
}
@@ -2470,7 +2470,7 @@ static void isr_io_pin( SLMP_INFO *info, u16 status )
if (status & SerialSignal_CTS) {
if ( debug_level >= DEBUG_LEVEL_ISR )
printk("CTS tx start...");
- info->port.tty->hw_stopped = 0;
+ info->port.tty->hw_stopped = 0;
tx_start(info);
info->pending_bh |= BH_TRANSMIT;
return;
@@ -2479,7 +2479,7 @@ static void isr_io_pin( SLMP_INFO *info, u16 status )
if (!(status & SerialSignal_CTS)) {
if ( debug_level >= DEBUG_LEVEL_ISR )
printk("CTS tx stop...");
- info->port.tty->hw_stopped = 1;
+ info->port.tty->hw_stopped = 1;
tx_stop(info);
}
}
@@ -2806,8 +2806,8 @@ static void change_params(SLMP_INFO *info)
info->read_status_mask2 = OVRN;
if (I_INPCK(info->port.tty))
info->read_status_mask2 |= PE | FRME;
- if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
- info->read_status_mask1 |= BRKD;
+ if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+ info->read_status_mask1 |= BRKD;
if (I_IGNPAR(info->port.tty))
info->ignore_status_mask2 |= PE | FRME;
if (I_IGNBRK(info->port.tty)) {
@@ -3177,7 +3177,7 @@ static int tiocmget(struct tty_struct *tty)
unsigned long flags;
spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
+ get_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS : 0) |
@@ -3215,7 +3215,7 @@ static int tiocmset(struct tty_struct *tty,
info->serial_signals &= ~SerialSignal_DTR;
spin_lock_irqsave(&info->lock,flags);
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
return 0;
@@ -3227,7 +3227,7 @@ static int carrier_raised(struct tty_port *port)
unsigned long flags;
spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
+ get_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
@@ -3243,7 +3243,7 @@ static void dtr_rts(struct tty_port *port, int on)
info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
else
info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
- set_signals(info);
+ set_signals(info);
spin_unlock_irqrestore(&info->lock,flags);
}
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 573b2055173c..1d4f317a0e42 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -967,8 +967,6 @@ static struct input_handler sysrq_handler = {
.id_table = sysrq_ids,
};
-static bool sysrq_handler_registered;
-
static inline void sysrq_register_handler(void)
{
int error;
@@ -978,16 +976,11 @@ static inline void sysrq_register_handler(void)
error = input_register_handler(&sysrq_handler);
if (error)
pr_err("Failed to register input handler, error %d", error);
- else
- sysrq_handler_registered = true;
}
static inline void sysrq_unregister_handler(void)
{
- if (sysrq_handler_registered) {
- input_unregister_handler(&sysrq_handler);
- sysrq_handler_registered = false;
- }
+ input_unregister_handler(&sysrq_handler);
}
static int sysrq_reset_seq_param_set(const char *buffer,
diff --git a/drivers/tty/tty_baudrate.c b/drivers/tty/tty_baudrate.c
index f438eaa68246..40207cab3b2a 100644
--- a/drivers/tty/tty_baudrate.c
+++ b/drivers/tty/tty_baudrate.c
@@ -17,32 +17,28 @@
* include/asm/termbits.h file.
*/
static const speed_t baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800,
+ 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
+ 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800,
#ifdef __sparc__
- 76800, 153600, 307200, 614400, 921600
+ 76800, 153600, 307200, 614400, 921600, 500000, 576000,
+ 1000000, 1152000, 1500000, 2000000
#else
500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,
2500000, 3000000, 3500000, 4000000
#endif
};
-#ifndef __sparc__
static const tcflag_t baud_bits[] = {
- B0, B50, B75, B110, B134, B150, B200, B300, B600,
- B1200, B1800, B2400, B4800, B9600, B19200, B38400,
- B57600, B115200, B230400, B460800, B500000, B576000,
- B921600, B1000000, B1152000, B1500000, B2000000, B2500000,
- B3000000, B3500000, B4000000
-};
+ B0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400,
+ B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800,
+#ifdef __sparc__
+ B76800, B153600, B307200, B614400, B921600, B500000, B576000,
+ B1000000, B1152000, B1500000, B2000000
#else
-static const tcflag_t baud_bits[] = {
- B0, B50, B75, B110, B134, B150, B200, B300, B600,
- B1200, B1800, B2400, B4800, B9600, B19200, B38400,
- B57600, B115200, B230400, B460800, B76800, B153600,
- B307200, B614400, B921600
-};
+ B500000, B576000, B921600, B1000000, B1152000, B1500000, B2000000,
+ B2500000, B3000000, B3500000, B4000000
#endif
+};
static int n_baud_table = ARRAY_SIZE(baud_table);
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index d9f54c7d94f2..a1453fe10862 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1893,7 +1893,7 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp,
struct tty_struct *tty_kopen(dev_t device)
{
struct tty_struct *tty;
- struct tty_driver *driver = NULL;
+ struct tty_driver *driver;
int index = -1;
mutex_lock(&tty_mutex);
diff --git a/drivers/tty/vt/.gitignore b/drivers/tty/vt/.gitignore
index 9b38b85f9d9a..3ecf42234d89 100644
--- a/drivers/tty/vt/.gitignore
+++ b/drivers/tty/vt/.gitignore
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
+conmakehash
consolemap_deftbl.c
defkeymap.c
diff --git a/drivers/tty/vt/Makefile b/drivers/tty/vt/Makefile
index edbbe0ccdb83..329ca336b8ee 100644
--- a/drivers/tty/vt/Makefile
+++ b/drivers/tty/vt/Makefile
@@ -12,10 +12,12 @@ obj-$(CONFIG_HW_CONSOLE) += vt.o defkeymap.o
# Files generated that shall be removed upon make clean
clean-files := consolemap_deftbl.c defkeymap.c
+hostprogs-y += conmakehash
+
quiet_cmd_conmk = CONMK $@
- cmd_conmk = scripts/conmakehash $< > $@
+ cmd_conmk = $(obj)/conmakehash $< > $@
-$(obj)/consolemap_deftbl.c: $(src)/$(FONTMAPFILE)
+$(obj)/consolemap_deftbl.c: $(src)/$(FONTMAPFILE) $(obj)/conmakehash
$(call cmd,conmk)
$(obj)/defkeymap.o: $(obj)/defkeymap.c
diff --git a/scripts/conmakehash.c b/drivers/tty/vt/conmakehash.c
index cddd789fe46e..cddd789fe46e 100644
--- a/scripts/conmakehash.c
+++ b/drivers/tty/vt/conmakehash.c
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 34aa39d1aed9..35d21cdb60d0 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3326,8 +3326,9 @@ static int __init con_init(void)
console_lock();
- if (conswitchp)
- display_desc = conswitchp->con_startup();
+ if (!conswitchp)
+ conswitchp = &dummy_con;
+ display_desc = conswitchp->con_startup();
if (!display_desc) {
fg_console = 0;
console_unlock();
@@ -3567,7 +3568,6 @@ err:
#ifdef CONFIG_VT_HW_CONSOLE_BINDING
-/* unlocked version of unbind_con_driver() */
int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
{
struct module *owner = csw->owner;
@@ -4095,7 +4095,7 @@ static void con_driver_unregister_callback(struct work_struct *ignored)
* when a driver wants to take over some existing consoles
* and become default driver for newly opened ones.
*
- * do_take_over_console is basically a register followed by unbind
+ * do_take_over_console is basically a register followed by bind
*/
int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
{
diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
index c10e17fb9a9a..70c10ea1c38b 100644
--- a/drivers/video/console/Kconfig
+++ b/drivers/video/console/Kconfig
@@ -93,7 +93,6 @@ config SGI_NEWPORT_CONSOLE
config DUMMY_CONSOLE
bool
- depends on VGA_CONSOLE!=y || SGI_NEWPORT_CONSOLE!=y
default y
config DUMMY_CONSOLE_COLUMNS
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index bb2bc99388ca..6a8e8c48c882 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -25,6 +25,7 @@ struct plat_serial8250_port {
unsigned char regshift; /* register shift */
unsigned char iotype; /* UPIO_* */
unsigned char hub6;
+ unsigned char has_sysrq; /* supports magic SysRq */
upf_t flags; /* UPF_* flags */
unsigned int type; /* If UPF_FIXED_TYPE */
unsigned int (*serial_in)(struct uart_port *, int);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 2b78cc734719..52404ef1694e 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -161,11 +161,6 @@ struct uart_port {
struct uart_icount icount; /* statistics */
struct console *cons; /* struct console, if any */
-#if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(SUPPORT_SYSRQ)
- unsigned long sysrq; /* sysrq timeout */
- unsigned int sysrq_ch; /* char for sysrq */
-#endif
-
/* flags must be updated while holding port mutex */
upf_t flags;
@@ -244,9 +239,13 @@ struct uart_port {
resource_size_t mapbase; /* for ioremap */
resource_size_t mapsize;
struct device *dev; /* parent device */
+
+ unsigned long sysrq; /* sysrq timeout */
+ unsigned int sysrq_ch; /* char for sysrq */
+ unsigned char has_sysrq;
+
unsigned char hub6; /* this should be in the 8250 driver */
unsigned char suspended;
- unsigned char unused[2];
const char *name; /* port name */
struct attribute_group *attr_group; /* port specific attributes */
const struct attribute_group **tty_groups; /* all attributes (serial core use only) */
@@ -460,81 +459,11 @@ extern void uart_handle_cts_change(struct uart_port *uport,
extern void uart_insert_char(struct uart_port *port, unsigned int status,
unsigned int overrun, unsigned int ch, unsigned int flag);
-#if defined(SUPPORT_SYSRQ) && defined(CONFIG_MAGIC_SYSRQ_SERIAL)
-static inline int
-uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
-{
- if (port->sysrq) {
- if (ch && time_before(jiffies, port->sysrq)) {
- handle_sysrq(ch);
- port->sysrq = 0;
- return 1;
- }
- port->sysrq = 0;
- }
- return 0;
-}
-static inline int
-uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch)
-{
- if (port->sysrq) {
- if (ch && time_before(jiffies, port->sysrq)) {
- port->sysrq_ch = ch;
- port->sysrq = 0;
- return 1;
- }
- port->sysrq = 0;
- }
- return 0;
-}
-static inline void
-uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags)
-{
- int sysrq_ch;
-
- sysrq_ch = port->sysrq_ch;
- port->sysrq_ch = 0;
-
- spin_unlock_irqrestore(&port->lock, irqflags);
-
- if (sysrq_ch)
- handle_sysrq(sysrq_ch);
-}
-#else
-static inline int
-uart_handle_sysrq_char(struct uart_port *port, unsigned int ch) { return 0; }
-static inline int
-uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch) { return 0; }
-static inline void
-uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags)
-{
- spin_unlock_irqrestore(&port->lock, irqflags);
-}
-#endif
-
-/*
- * We do the SysRQ and SAK checking like this...
- */
-static inline int uart_handle_break(struct uart_port *port)
-{
- struct uart_state *state = port->state;
-
- if (port->handle_break)
- port->handle_break(port);
-
-#ifdef SUPPORT_SYSRQ
- if (port->cons && port->cons->index == port->line) {
- if (!port->sysrq) {
- port->sysrq = jiffies + HZ*5;
- return 1;
- }
- port->sysrq = 0;
- }
-#endif
- if (port->flags & UPF_SAK)
- do_SAK(state->port.tty);
- return 0;
-}
+extern int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch);
+extern int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch);
+extern void uart_unlock_and_check_sysrq(struct uart_port *port,
+ unsigned long irqflags);
+extern int uart_handle_break(struct uart_port *port);
/*
* UART_ENABLE_MS - determine if port should enable modem status irqs
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 306054ef340f..ef45f96cd7a5 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -2,7 +2,6 @@
# Generated files
#
bin2c
-conmakehash
kallsyms
unifdef
recordmcount
diff --git a/scripts/Makefile b/scripts/Makefile
index b0e962611d50..4d41f48e7376 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -4,14 +4,11 @@
# the kernel for the build process.
# ---------------------------------------------------------------------------
# kallsyms: Find all symbols in vmlinux
-# conmakehash: Create chartable
-# conmakehash: Create arrays for initializing the kernel console tables
HOST_EXTRACFLAGS += -I$(srctree)/tools/include
hostprogs-$(CONFIG_BUILD_BIN2C) += bin2c
hostprogs-$(CONFIG_KALLSYMS) += kallsyms
-hostprogs-$(CONFIG_VT) += conmakehash
hostprogs-$(BUILD_C_RECORDMCOUNT) += recordmcount
hostprogs-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
hostprogs-$(CONFIG_ASN1) += asn1_compiler