diff options
Diffstat (limited to 'arch/powerpc/kernel/udbg_16550.c')
| -rw-r--r-- | arch/powerpc/kernel/udbg_16550.c | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c index 9356b60d6030..a0467e528b70 100644 --- a/arch/powerpc/kernel/udbg_16550.c +++ b/arch/powerpc/kernel/udbg_16550.c @@ -7,7 +7,7 @@ #include <linux/types.h> #include <asm/udbg.h> #include <asm/io.h> -#include <asm/reg_a2.h> +#include <asm/early_ioremap.h> extern u8 real_readb(volatile u8 __iomem *addr); extern void real_writeb(u8 data, volatile u8 __iomem *addr); @@ -84,7 +84,7 @@ static int udbg_uart_getc(void) return udbg_uart_in(UART_RBR); } -static void udbg_use_uart(void) +static void __init udbg_use_uart(void) { udbg_putc = udbg_uart_putc; udbg_flush = udbg_uart_flush; @@ -92,7 +92,7 @@ static void udbg_use_uart(void) udbg_getc_poll = udbg_uart_getc_poll; } -void udbg_uart_setup(unsigned int speed, unsigned int clock) +void __init udbg_uart_setup(unsigned int speed, unsigned int clock) { unsigned int dll, base_bauds; @@ -121,7 +121,7 @@ void udbg_uart_setup(unsigned int speed, unsigned int clock) udbg_uart_out(UART_FCR, 0x7); } -unsigned int udbg_probe_uart_speed(unsigned int clock) +unsigned int __init udbg_probe_uart_speed(unsigned int clock) { unsigned int dll, dlm, divisor, prescaler, speed; u8 old_lcr; @@ -172,7 +172,7 @@ static void udbg_uart_out_pio(unsigned int reg, u8 data) outb(data, udbg_uart.pio_base + (reg * udbg_uart_stride)); } -void udbg_uart_init_pio(unsigned long port, unsigned int stride) +void __init udbg_uart_init_pio(unsigned long port, unsigned int stride) { if (!port) return; @@ -194,7 +194,7 @@ static void udbg_uart_out_mmio(unsigned int reg, u8 data) } -void udbg_uart_init_mmio(void __iomem *addr, unsigned int stride) +void __init udbg_uart_init_mmio(void __iomem *addr, unsigned int stride) { if (!addr) return; @@ -296,3 +296,35 @@ void __init udbg_init_40x_realmode(void) } #endif /* CONFIG_PPC_EARLY_DEBUG_40x */ + +#ifdef CONFIG_PPC_EARLY_DEBUG_16550 + +static void __iomem *udbg_uart_early_addr; + +void __init udbg_init_debug_16550(void) +{ + udbg_uart_early_addr = early_ioremap(CONFIG_PPC_EARLY_DEBUG_16550_PHYSADDR, 0x1000); + udbg_uart_init_mmio(udbg_uart_early_addr, CONFIG_PPC_EARLY_DEBUG_16550_STRIDE); +} + +static int __init udbg_init_debug_16550_ioremap(void) +{ + void __iomem *addr; + + if (!udbg_uart_early_addr) + return 0; + + addr = ioremap(CONFIG_PPC_EARLY_DEBUG_16550_PHYSADDR, 0x1000); + if (WARN_ON(!addr)) + return -ENOMEM; + + udbg_uart_init_mmio(addr, CONFIG_PPC_EARLY_DEBUG_16550_STRIDE); + early_iounmap(udbg_uart_early_addr, 0x1000); + udbg_uart_early_addr = NULL; + + return 0; +} + +early_initcall(udbg_init_debug_16550_ioremap); + +#endif /* CONFIG_PPC_EARLY_DEBUG_16550 */ |