diff options
Diffstat (limited to 'arch/mips/cobalt')
| -rw-r--r-- | arch/mips/cobalt/Kconfig | 7 | ||||
| -rw-r--r-- | arch/mips/cobalt/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/cobalt/console.c | 43 | ||||
| -rw-r--r-- | arch/mips/cobalt/setup.c | 13 |
4 files changed, 57 insertions, 8 deletions
diff --git a/arch/mips/cobalt/Kconfig b/arch/mips/cobalt/Kconfig new file mode 100644 index 000000000000..7c42b088d16c --- /dev/null +++ b/arch/mips/cobalt/Kconfig @@ -0,0 +1,7 @@ +config EARLY_PRINTK + bool "Early console support" + depends on MIPS_COBALT + help + Provide early console support by direct access to the + on board UART. The UART must have been previously + initialised by the boot loader. diff --git a/arch/mips/cobalt/Makefile b/arch/mips/cobalt/Makefile index 3b6b7579d1de..720e757b2b64 100644 --- a/arch/mips/cobalt/Makefile +++ b/arch/mips/cobalt/Makefile @@ -4,4 +4,6 @@ obj-y := irq.o int-handler.o reset.o setup.o +obj-$(CONFIG_EARLY_PRINTK) += console.o + EXTRA_AFLAGS := $(CFLAGS) diff --git a/arch/mips/cobalt/console.c b/arch/mips/cobalt/console.c new file mode 100644 index 000000000000..45c2d27c7564 --- /dev/null +++ b/arch/mips/cobalt/console.c @@ -0,0 +1,43 @@ +/* + * (C) P. Horton 2006 + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/console.h> +#include <linux/serial_reg.h> +#include <asm/addrspace.h> +#include <asm/mach-cobalt/cobalt.h> + +static void putchar(int c) +{ + if(c == '\n') + putchar('\r'); + + while(!(COBALT_UART[UART_LSR] & UART_LSR_THRE)) + ; + + COBALT_UART[UART_TX] = c; +} + +static void cons_write(struct console *c, const char *s, unsigned n) +{ + while(n-- && *s) + putchar(*s++); +} + +static struct console cons_info = +{ + .name = "uart", + .write = cons_write, + .flags = CON_PRINTBUFFER | CON_BOOT, + .index = -1, +}; + +void __init cobalt_early_console(void) +{ + register_console(&cons_info); + + printk("Cobalt: early console registered\n"); +} diff --git a/arch/mips/cobalt/setup.c b/arch/mips/cobalt/setup.c index b9713a723053..4f9ea1210023 100644 --- a/arch/mips/cobalt/setup.c +++ b/arch/mips/cobalt/setup.c @@ -31,6 +31,7 @@ extern void cobalt_machine_restart(char *command); extern void cobalt_machine_halt(void); extern void cobalt_machine_power_off(void); +extern void cobalt_early_console(void); int cobalt_board_id; @@ -109,14 +110,6 @@ void __init plat_setup(void) /* I/O port resource must include UART and LCD/buttons */ ioport_resource.end = 0x0fffffff; - /* - * This is a prom style console. We just poke at the - * UART to make it talk. - * Only use this console if you really screw up and can't - * get to the stage of setting up a real serial console. - */ - /*ns16550_setup_console();*/ - /* request I/O space for devices used on all i[345]86 PCs */ for (i = 0; i < COBALT_IO_RESOURCES; i++) request_resource(&ioport_resource, cobalt_io_resources + i); @@ -136,6 +129,10 @@ void __init plat_setup(void) #ifdef CONFIG_SERIAL_8250 if (cobalt_board_id > COBALT_BRD_ID_RAQ1) { +#ifdef CONFIG_EARLY_PRINTK + cobalt_early_console(); +#endif + uart.line = 0; uart.type = PORT_UNKNOWN; uart.uartclk = 18432000; |