diff options
Diffstat (limited to 'arch/sh/kernel/early_printk.c')
| -rw-r--r-- | arch/sh/kernel/early_printk.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/arch/sh/kernel/early_printk.c b/arch/sh/kernel/early_printk.c index 80b637c30203..85ed5b7ef278 100644 --- a/arch/sh/kernel/early_printk.c +++ b/arch/sh/kernel/early_printk.c @@ -13,6 +13,7 @@ #include <linux/tty.h> #include <linux/init.h> #include <linux/io.h> +#include <linux/delay.h> #ifdef CONFIG_SH_STANDARD_BIOS #include <asm/sh_bios.h> @@ -62,6 +63,18 @@ static struct console bios_console = { #include <linux/serial_core.h> #include "../../../drivers/serial/sh-sci.h" +#if defined(CONFIG_CPU_SUBTYPE_SH7720) +#define EPK_SCSMR_VALUE 0x000 +#define EPK_SCBRR_VALUE 0x00C +#define EPK_FIFO_SIZE 64 +#define EPK_FIFO_BITS (0x7f00 >> 8) +#else +#define EPK_FIFO_SIZE 16 +#define EPK_FIFO_BITS (0x1f00 >> 8) +#endif + + + static struct uart_port scif_port = { .mapbase = CONFIG_EARLY_SCIF_CONSOLE_PORT, .membase = (char __iomem *)CONFIG_EARLY_SCIF_CONSOLE_PORT, @@ -69,7 +82,7 @@ static struct uart_port scif_port = { static void scif_sercon_putc(int c) { - while (((sci_in(&scif_port, SCFDR) & 0x1f00 >> 8) == 16)) + while (((sci_in(&scif_port, SCFDR) & EPK_FIFO_BITS) >= EPK_FIFO_SIZE)) ; sci_out(&scif_port, SCxTDR, c); @@ -105,7 +118,22 @@ static struct console scif_console = { .index = -1, }; -#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_SH_STANDARD_BIOS) +#if !defined(CONFIG_SH_STANDARD_BIOS) +#if defined(CONFIG_CPU_SUBTYPE_SH7720) +static void scif_sercon_init(char *s) +{ + sci_out(&scif_port, SCSCR, 0x0000); /* clear TE and RE */ + sci_out(&scif_port, SCFCR, 0x4006); /* reset */ + sci_out(&scif_port, SCSCR, 0x0000); /* select internal clock */ + sci_out(&scif_port, SCSMR, EPK_SCSMR_VALUE); + sci_out(&scif_port, SCBRR, EPK_SCBRR_VALUE); + + mdelay(1); /* wait 1-bit time */ + + sci_out(&scif_port, SCFCR, 0x0030); /* TTRG=b'11 */ + sci_out(&scif_port, SCSCR, 0x0030); /* TE, RE */ +} +#elif defined(CONFIG_CPU_SH4) #define DEFAULT_BAUD 115200 /* * Simple SCIF init, primarily aimed at SH7750 and other similar SH-4 @@ -146,7 +174,8 @@ static void scif_sercon_init(char *s) ctrl_outw(0, scif_port.mapbase + 36); ctrl_outw(0x30, scif_port.mapbase + 8); } -#endif /* CONFIG_CPU_SH4 && !CONFIG_SH_STANDARD_BIOS */ +#endif /* defined(CONFIG_CPU_SUBTYPE_SH7720) */ +#endif /* !defined(CONFIG_SH_STANDARD_BIOS) */ #endif /* CONFIG_EARLY_SCIF_CONSOLE */ /* @@ -186,7 +215,8 @@ int __init setup_early_printk(char *buf) if (!strncmp(buf, "serial", 6)) { early_console = &scif_console; -#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_SH_STANDARD_BIOS) +#if (defined(CONFIG_CPU_SH4) || defined(CONFIG_CPU_SUBTYPE_SH7720)) && \ + !defined(CONFIG_SH_STANDARD_BIOS) scif_sercon_init(buf + 6); #endif } |
