diff options
Diffstat (limited to 'arch/sh/kernel/early_printk.c')
| -rw-r--r-- | arch/sh/kernel/early_printk.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/arch/sh/kernel/early_printk.c b/arch/sh/kernel/early_printk.c deleted file mode 100644 index a952dcf..0000000 --- a/arch/sh/kernel/early_printk.c +++ /dev/null @@ -1,241 +0,0 @@ -/* - * arch/sh/kernel/early_printk.c - * - * Copyright (C) 1999, 2000 Niibe Yutaka - * Copyright (C) 2002 M. R. Brown - * Copyright (C) 2004 - 2007 Paul Mundt - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include <linux/console.h> -#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> - -/* - * Print a string through the BIOS - */ -static void sh_console_write(struct console *co, const char *s, - unsigned count) -{ - sh_bios_console_write(s, count); -} - -/* - * Setup initial baud/bits/parity. We do two things here: - * - construct a cflag setting for the first rs_open() - * - initialize the serial port - * Return non-zero if we didn't find a serial port. - */ -static int __init sh_console_setup(struct console *co, char *options) -{ - int cflag = CREAD | HUPCL | CLOCAL; - - /* - * Now construct a cflag setting. - * TODO: this is a totally bogus cflag, as we have - * no idea what serial settings the BIOS is using, or - * even if its using the serial port at all. - */ - cflag |= B115200 | CS8 | /*no parity*/0; - - co->cflag = cflag; - - return 0; -} - -static struct console bios_console = { - .name = "bios", - .write = sh_console_write, - .setup = sh_console_setup, - .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) -#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 = -#ifdef CONFIG_SH_STANDARD_BIOS - &bios_console -#elif defined(CONFIG_EARLY_SCIF_CONSOLE) - &scif_console -#else - NULL -#endif - ; - -static int __init setup_early_printk(char *buf) -{ - int keep_early = 0; - - if (!buf) - return 0; - - 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_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) - scif_sercon_init(buf + 6); -#endif -#endif - } -#endif - - if (likely(early_console)) { - if (keep_early) - early_console->flags &= ~CON_BOOT; - else - early_console->flags |= CON_BOOT; - register_console(early_console); - } - - return 0; -} -early_param("earlyprintk", setup_early_printk); |
