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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-15 11:37:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-15 11:37:02 -0800
commita9724125ad014decf008d782e60447c811391326 (patch)
tree4fac069d155f2495907fa9c296cc5426d0eebf55 /arch/x86/platform
parent46f7b635569731ff81a3b72d1bcd4415b293b637 (diff)
parentc09babfab7ae8c7d79a5dce9d866fbb28b82dde4 (diff)
Merge tag 'tty-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver patches from Greg KH: "Here's the big tty/serial driver update for 3.20-rc1. Nothing huge here, just lots of driver updates and some core tty layer fixes as well. All have been in linux-next with no reported issues" * tag 'tty-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (119 commits) serial: 8250: Fix UART_BUG_TXEN workaround serial: driver for ETRAX FS UART tty: remove unused variable sprop serial: of-serial: fetch line number from DT serial: samsung: earlycon support depends on CONFIG_SERIAL_SAMSUNG_CONSOLE tty/serial: serial8250_set_divisor() can be static tty/serial: Add Spreadtrum sc9836-uart driver support Documentation: DT: Add bindings for Spreadtrum SoC Platform serial: samsung: remove redundant interrupt enabling tty: Remove external interface for tty_set_termios() serial: omap: Fix RTS handling serial: 8250_omap: Use UPSTAT_AUTORTS for RTS handling serial: core: Rework hw-assisted flow control support tty/serial: 8250_early: Add support for PXA UARTs tty/serial: of_serial: add support for PXA/MMP uarts tty/serial: of_serial: add DT alias ID handling serial: 8250: Prevent concurrent updates to shadow registers serial: 8250: Use canary to restart console after suspend serial: 8250: Refactor XR17V35X divisor calculation serial: 8250: Refactor divisor programming ...
Diffstat (limited to 'arch/x86/platform')
-rw-r--r--arch/x86/platform/intel-mid/device_libs/Makefile2
-rw-r--r--arch/x86/platform/intel-mid/device_libs/platform_max3111.c35
-rw-r--r--arch/x86/platform/intel-mid/early_printk_intel_mid.c220
3 files changed, 4 insertions, 253 deletions
diff --git a/arch/x86/platform/intel-mid/device_libs/Makefile b/arch/x86/platform/intel-mid/device_libs/Makefile
index af9307f2cc28..91ec9f8704bf 100644
--- a/arch/x86/platform/intel-mid/device_libs/Makefile
+++ b/arch/x86/platform/intel-mid/device_libs/Makefile
@@ -16,8 +16,6 @@ obj-$(subst m,y,$(CONFIG_INPUT_MPU3050)) += platform_mpu3050.o
obj-$(subst m,y,$(CONFIG_INPUT_BMA150)) += platform_bma023.o
obj-$(subst m,y,$(CONFIG_GPIO_PCA953X)) += platform_tca6416.o
obj-$(subst m,y,$(CONFIG_DRM_MEDFIELD)) += platform_tc35876x.o
-# SPI Devices
-obj-$(subst m,y,$(CONFIG_SERIAL_MRST_MAX3110)) += platform_max3111.o
# MISC Devices
obj-$(subst m,y,$(CONFIG_KEYBOARD_GPIO)) += platform_gpio_keys.o
obj-$(subst m,y,$(CONFIG_INTEL_MID_WATCHDOG)) += platform_wdt.o
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_max3111.c b/arch/x86/platform/intel-mid/device_libs/platform_max3111.c
deleted file mode 100644
index afd1df94e0e5..000000000000
--- a/arch/x86/platform/intel-mid/device_libs/platform_max3111.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * platform_max3111.c: max3111 platform data initilization file
- *
- * (C) Copyright 2013 Intel Corporation
- * Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
- */
-
-#include <linux/gpio.h>
-#include <linux/spi/spi.h>
-#include <asm/intel-mid.h>
-
-static void __init *max3111_platform_data(void *info)
-{
- struct spi_board_info *spi_info = info;
- int intr = get_gpio_by_name("max3111_int");
-
- spi_info->mode = SPI_MODE_0;
- if (intr == -1)
- return NULL;
- spi_info->irq = intr + INTEL_MID_IRQ_OFFSET;
- return NULL;
-}
-
-static const struct devs_id max3111_dev_id __initconst = {
- .name = "spi_max3111",
- .type = SFI_DEV_TYPE_SPI,
- .get_platform_data = &max3111_platform_data,
-};
-
-sfi_device(max3111_dev_id);
diff --git a/arch/x86/platform/intel-mid/early_printk_intel_mid.c b/arch/x86/platform/intel-mid/early_printk_intel_mid.c
index e0bd082a80e0..4e720829ab90 100644
--- a/arch/x86/platform/intel-mid/early_printk_intel_mid.c
+++ b/arch/x86/platform/intel-mid/early_printk_intel_mid.c
@@ -10,15 +10,13 @@
*/
/*
- * This file implements two early consoles named mrst and hsu.
- * mrst is based on Maxim3110 spi-uart device, it exists in both
- * Moorestown and Medfield platforms, while hsu is based on a High
- * Speed UART device which only exists in the Medfield platform
+ * This file implements early console named hsu.
+ * hsu is based on a High Speed UART device which only exists in the Medfield
+ * platform
*/
#include <linux/serial_reg.h>
#include <linux/serial_mfd.h>
-#include <linux/kmsg_dump.h>
#include <linux/console.h>
#include <linux/kernel.h>
#include <linux/delay.h>
@@ -28,216 +26,6 @@
#include <asm/pgtable.h>
#include <asm/intel-mid.h>
-#define MRST_SPI_TIMEOUT 0x200000
-#define MRST_REGBASE_SPI0 0xff128000
-#define MRST_REGBASE_SPI1 0xff128400
-#define MRST_CLK_SPI0_REG 0xff11d86c
-
-/* Bit fields in CTRLR0 */
-#define SPI_DFS_OFFSET 0
-
-#define SPI_FRF_OFFSET 4
-#define SPI_FRF_SPI 0x0
-#define SPI_FRF_SSP 0x1
-#define SPI_FRF_MICROWIRE 0x2
-#define SPI_FRF_RESV 0x3
-
-#define SPI_MODE_OFFSET 6
-#define SPI_SCPH_OFFSET 6
-#define SPI_SCOL_OFFSET 7
-#define SPI_TMOD_OFFSET 8
-#define SPI_TMOD_TR 0x0 /* xmit & recv */
-#define SPI_TMOD_TO 0x1 /* xmit only */
-#define SPI_TMOD_RO 0x2 /* recv only */
-#define SPI_TMOD_EPROMREAD 0x3 /* eeprom read mode */
-
-#define SPI_SLVOE_OFFSET 10
-#define SPI_SRL_OFFSET 11
-#define SPI_CFS_OFFSET 12
-
-/* Bit fields in SR, 7 bits */
-#define SR_MASK 0x7f /* cover 7 bits */
-#define SR_BUSY (1 << 0)
-#define SR_TF_NOT_FULL (1 << 1)
-#define SR_TF_EMPT (1 << 2)
-#define SR_RF_NOT_EMPT (1 << 3)
-#define SR_RF_FULL (1 << 4)
-#define SR_TX_ERR (1 << 5)
-#define SR_DCOL (1 << 6)
-
-struct dw_spi_reg {
- u32 ctrl0;
- u32 ctrl1;
- u32 ssienr;
- u32 mwcr;
- u32 ser;
- u32 baudr;
- u32 txfltr;
- u32 rxfltr;
- u32 txflr;
- u32 rxflr;
- u32 sr;
- u32 imr;
- u32 isr;
- u32 risr;
- u32 txoicr;
- u32 rxoicr;
- u32 rxuicr;
- u32 msticr;
- u32 icr;
- u32 dmacr;
- u32 dmatdlr;
- u32 dmardlr;
- u32 idr;
- u32 version;
-
- /* Currently operates as 32 bits, though only the low 16 bits matter */
- u32 dr;
-} __packed;
-
-#define dw_readl(dw, name) __raw_readl(&(dw)->name)
-#define dw_writel(dw, name, val) __raw_writel((val), &(dw)->name)
-
-/* Default use SPI0 register for mrst, we will detect Penwell and use SPI1 */
-static unsigned long mrst_spi_paddr = MRST_REGBASE_SPI0;
-
-static u32 *pclk_spi0;
-/* Always contains an accessible address, start with 0 */
-static struct dw_spi_reg *pspi;
-
-static struct kmsg_dumper dw_dumper;
-static int dumper_registered;
-
-static void dw_kmsg_dump(struct kmsg_dumper *dumper,
- enum kmsg_dump_reason reason)
-{
- static char line[1024];
- size_t len;
-
- /* When run to this, we'd better re-init the HW */
- mrst_early_console_init();
-
- while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len))
- early_mrst_console.write(&early_mrst_console, line, len);
-}
-
-/* Set the ratio rate to 115200, 8n1, IRQ disabled */
-static void max3110_write_config(void)
-{
- u16 config;
-
- config = 0xc001;
- dw_writel(pspi, dr, config);
-}
-
-/* Translate char to a eligible word and send to max3110 */
-static void max3110_write_data(char c)
-{
- u16 data;
-
- data = 0x8000 | c;
- dw_writel(pspi, dr, data);
-}
-
-void mrst_early_console_init(void)
-{
- u32 ctrlr0 = 0;
- u32 spi0_cdiv;
- u32 freq; /* Freqency info only need be searched once */
-
- /* Base clk is 100 MHz, the actual clk = 100M / (clk_divider + 1) */
- pclk_spi0 = (void *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE,
- MRST_CLK_SPI0_REG);
- spi0_cdiv = ((*pclk_spi0) & 0xe00) >> 9;
- freq = 100000000 / (spi0_cdiv + 1);
-
- if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_PENWELL)
- mrst_spi_paddr = MRST_REGBASE_SPI1;
-
- pspi = (void *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE,
- mrst_spi_paddr);
-
- /* Disable SPI controller */
- dw_writel(pspi, ssienr, 0);
-
- /* Set control param, 8 bits, transmit only mode */
- ctrlr0 = dw_readl(pspi, ctrl0);
-
- ctrlr0 &= 0xfcc0;
- ctrlr0 |= 0xf | (SPI_FRF_SPI << SPI_FRF_OFFSET)
- | (SPI_TMOD_TO << SPI_TMOD_OFFSET);
- dw_writel(pspi, ctrl0, ctrlr0);
-
- /*
- * Change the spi0 clk to comply with 115200 bps, use 100000 to
- * calculate the clk dividor to make the clock a little slower
- * than real baud rate.
- */
- dw_writel(pspi, baudr, freq/100000);
-
- /* Disable all INT for early phase */
- dw_writel(pspi, imr, 0x0);
-
- /* Set the cs to spi-uart */
- dw_writel(pspi, ser, 0x2);
-
- /* Enable the HW, the last step for HW init */
- dw_writel(pspi, ssienr, 0x1);
-
- /* Set the default configuration */
- max3110_write_config();
-
- /* Register the kmsg dumper */
- if (!dumper_registered) {
- dw_dumper.dump = dw_kmsg_dump;
- kmsg_dump_register(&dw_dumper);
- dumper_registered = 1;
- }
-}
-
-/* Slave select should be called in the read/write function */
-static void early_mrst_spi_putc(char c)
-{
- unsigned int timeout;
- u32 sr;
-
- timeout = MRST_SPI_TIMEOUT;
- /* Early putc needs to make sure the TX FIFO is not full */
- while (--timeout) {
- sr = dw_readl(pspi, sr);
- if (!(sr & SR_TF_NOT_FULL))
- cpu_relax();
- else
- break;
- }
-
- if (!timeout)
- pr_warn("MRST earlycon: timed out\n");
- else
- max3110_write_data(c);
-}
-
-/* Early SPI only uses polling mode */
-static void early_mrst_spi_write(struct console *con, const char *str,
- unsigned n)
-{
- int i;
-
- for (i = 0; i < n && *str; i++) {
- if (*str == '\n')
- early_mrst_spi_putc('\r');
- early_mrst_spi_putc(*str);
- str++;
- }
-}
-
-struct console early_mrst_console = {
- .name = "earlymrst",
- .write = early_mrst_spi_write,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
/*
* Following is the early console based on Medfield HSU (High
* Speed UART) device.
@@ -259,7 +47,7 @@ void hsu_early_console_init(const char *s)
port = clamp_val(port, 0, 2);
paddr = HSU_PORT_BASE + port * 0x80;
- phsu = (void *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE, paddr);
+ phsu = (void __iomem *)set_fixmap_offset_nocache(FIX_EARLYCON_MEM_BASE, paddr);
/* Disable FIFO */
writeb(0x0, phsu + UART_FCR);