diff options
| -rw-r--r-- | arch/sh/Kconfig.debug | 44 | ||||
| -rw-r--r-- | arch/sh/kernel/Makefile | 3 | ||||
| -rw-r--r-- | arch/sh/kernel/early_printk.c | 147 |
3 files changed, 1 insertions, 193 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug index 55907af1dc25..12fec72fec5f 100644 --- a/arch/sh/Kconfig.debug +++ b/arch/sh/Kconfig.debug @@ -19,50 +19,6 @@ config SH_STANDARD_BIOS mask ROM and no flash (WindowsCE machines fall in this category). If unsure, say N. -config EARLY_SCIF_CONSOLE - bool "Use early SCIF console" - help - This enables an early console using a fixed SCIF port. This can - be used by platforms that are either not running the SH - standard BIOS, or do not wish to use the BIOS callbacks for the - serial I/O. - -config EARLY_SCIF_CONSOLE_PORT - hex - depends on EARLY_SCIF_CONSOLE - default "0xa4400000" if CPU_SUBTYPE_SH7712 || CPU_SUBTYPE_SH7705 - default "0xa4430000" if CPU_SUBTYPE_SH7720 || CPU_SUBTYPE_SH7721 - default "0xf8420000" if CPU_SUBTYPE_SH7619 - default "0xff804000" if CPU_SUBTYPE_MXG - default "0xffc30000" if CPU_SUBTYPE_SHX3 - default "0xffe00000" if CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7763 || \ - CPU_SUBTYPE_SH7722 || CPU_SUBTYPE_SH7366 || \ - CPU_SUBTYPE_SH7343 - default "0xfe4c0000" if CPU_SUBTYPE_SH7757 - default "0xffeb0000" if CPU_SUBTYPE_SH7785 - default "0xffeb0000" if CPU_SUBTYPE_SH7786 - default "0xfffe8000" if CPU_SUBTYPE_SH7203 - default "0xfffe9800" if CPU_SUBTYPE_SH7206 || CPU_SUBTYPE_SH7263 - default "0xffe80000" if CPU_SH4 - default "0xa4000150" if CPU_SH3 - default "0x00000000" - -config EARLY_PRINTK - bool "Early printk support" - depends on SH_STANDARD_BIOS || EARLY_SCIF_CONSOLE - help - Say Y here to redirect kernel printk messages to the serial port - used by the SH-IPL bootloader, starting very early in the boot - process and ending when the kernel's serial console is initialised. - This option is only useful porting the kernel to a new machine, - when the kernel may crash or hang before the serial console is - initialised. If unsure, say N. - - On devices that are running SH-IPL and want to keep the port - initialization consistent while not using the BIOS callbacks, - select both the EARLY_SCIF_CONSOLE and SH_STANDARD_BIOS, using - the kernel command line option to toggle back and forth. - config STACK_DEBUG bool "Check for stack overflows" depends on DEBUG_KERNEL && SUPERH32 diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index 0471a3eb25ed..0d587da1ef12 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -22,11 +22,10 @@ obj-y := debugtraps.o dma-nommu.o dumpstack.o \ obj-y += cpu/ obj-$(CONFIG_VSYSCALL) += vsyscall/ obj-$(CONFIG_SMP) += smp.o -obj-$(CONFIG_SH_STANDARD_BIOS) += sh_bios.o +obj-$(CONFIG_SH_STANDARD_BIOS) += sh_bios.o early_printk.o obj-$(CONFIG_KGDB) += kgdb.o obj-$(CONFIG_SH_CPU_FREQ) += cpufreq.o obj-$(CONFIG_MODULES) += sh_ksyms_$(BITS).o module.o -obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o obj-$(CONFIG_CRASH_DUMP) += crash_dump.o obj-$(CONFIG_STACKTRACE) += stacktrace.o diff --git a/arch/sh/kernel/early_printk.c b/arch/sh/kernel/early_printk.c index fe7dc3fe1db1..f8bb50c6e050 100644 --- a/arch/sh/kernel/early_printk.c +++ b/arch/sh/kernel/early_printk.c @@ -15,7 +15,6 @@ #include <linux/io.h> #include <linux/delay.h> -#ifdef CONFIG_SH_STANDARD_BIOS #include <asm/sh_bios.h> /* @@ -57,140 +56,7 @@ static struct console bios_console = { .flags = CON_PRINTBUFFER, .index = -1, }; -#endif -#ifdef CONFIG_EARLY_SCIF_CONSOLE -#include <linux/serial_core.h> -#include "../../../drivers/serial/sh-sci.h" - -#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) -#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 = { - .type = PORT_SCIF, - .mapbase = CONFIG_EARLY_SCIF_CONSOLE_PORT, - .membase = (char __iomem *)CONFIG_EARLY_SCIF_CONSOLE_PORT, -}; - -static void scif_sercon_putc(int c) -{ - while (((sci_in(&scif_port, SCFDR) & EPK_FIFO_BITS) >= EPK_FIFO_SIZE)) - ; - - sci_in(&scif_port, SCxSR); - sci_out(&scif_port, SCxSR, 0xf3 & ~(0x20 | 0x40)); - sci_out(&scif_port, SCxTDR, c); - - while ((sci_in(&scif_port, SCxSR) & 0x40) == 0) - ; - - if (c == '\n') - scif_sercon_putc('\r'); -} - -static void scif_sercon_write(struct console *con, const char *s, - unsigned count) -{ - while (count-- > 0) - scif_sercon_putc(*s++); -} - -static int __init scif_sercon_setup(struct console *con, char *options) -{ - con->cflag = CREAD | HUPCL | CLOCAL | B115200 | CS8; - - return 0; -} - -static struct console scif_console = { - .name = "sercon", - .write = scif_sercon_write, - .setup = scif_sercon_setup, - .flags = CON_PRINTBUFFER, - .index = -1, -}; - -#if !defined(CONFIG_SH_STANDARD_BIOS) -#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) -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) || defined(CONFIG_CPU_SH3) -#define DEFAULT_BAUD 115200 -/* - * Simple SCIF init, primarily aimed at SH7750 and other similar SH-4 - * devices that aren't using sh-ipl+g. - */ -static void scif_sercon_init(char *s) -{ - struct uart_port *port = &scif_port; - unsigned baud = DEFAULT_BAUD; - unsigned int status; - char *e; - - if (*s == ',') - ++s; - - if (*s) { - /* ignore ioport/device name */ - s += strcspn(s, ","); - if (*s == ',') - s++; - } - - if (*s) { - baud = simple_strtoul(s, &e, 0); - if (baud == 0 || s == e) - baud = DEFAULT_BAUD; - } - - do { - status = sci_in(port, SCxSR); - } while (!(status & SCxSR_TEND(port))); - - sci_out(port, SCSCR, 0); /* TE=0, RE=0 */ - sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST); - sci_out(port, SCSMR, 0); - - /* Set baud rate */ - sci_out(port, SCBRR, (CONFIG_SH_PCLK_FREQ + 16 * baud) / - (32 * baud) - 1); - udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ - - sci_out(port, SCSPTR, 0); - sci_out(port, SCxSR, 0x60); - sci_out(port, SCLSR, 0); - - sci_out(port, SCFCR, 0); - sci_out(port, SCSCR, 0x30); /* TE=1, RE=1 */ -} -#endif /* defined(CONFIG_CPU_SUBTYPE_SH7720) */ -#endif /* !defined(CONFIG_SH_STANDARD_BIOS) */ -#endif /* CONFIG_EARLY_SCIF_CONSOLE */ - -/* - * Setup a default console, if more than one is compiled in, rely on the - * earlyprintk= parsing to give priority. - */ static struct console *early_console; static int __init setup_early_printk(char *buf) @@ -203,21 +69,8 @@ static int __init setup_early_printk(char *buf) if (strstr(buf, "keep")) keep_early = 1; -#ifdef CONFIG_SH_STANDARD_BIOS if (!strncmp(buf, "bios", 4)) early_console = &bios_console; -#endif -#if defined(CONFIG_EARLY_SCIF_CONSOLE) - if (!strncmp(buf, "serial", 6)) { - early_console = &scif_console; - -#if !defined(CONFIG_SH_STANDARD_BIOS) -#if defined(CONFIG_CPU_SH4) || defined(CONFIG_CPU_SH3) - scif_sercon_init(buf + 6); -#endif -#endif - } -#endif if (likely(early_console)) { if (keep_early) |