malta-setup.c

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/*
 * Carsten Langgaard, [email protected]
 * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
 * Copyright (C) 2008 Dmitri Vorobiev
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */
#include <linux/cpu.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/screen_info.h>
#include <linux/time.h>

#include <asm/bootinfo.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/prom.h>
#include <asm/mips-boards/malta.h>
#include <asm/mips-boards/maltaint.h>
#include <asm/dma.h>
#include <asm/traps.h>
#ifdef CONFIG_VT
#include <linux/console.h>
#endif

extern void malta_be_init(void);
extern int malta_be_handler(struct pt_regs *regs, int is_fixup);

static struct resource standard_io_resources[] = {
    {
        .name = "dma1",
        .start = 0x00,
        .end = 0x1f,
        .flags = IORESOURCE_BUSY
    },
    {
        .name = "timer",
        .start = 0x40,
        .end = 0x5f,
        .flags = IORESOURCE_BUSY
    },
    {
        .name = "keyboard",
        .start = 0x60,
        .end = 0x6f,
        .flags = IORESOURCE_BUSY
    },
    {
        .name = "dma page reg",
        .start = 0x80,
        .end = 0x8f,
        .flags = IORESOURCE_BUSY
    },
    {
        .name = "dma2",
        .start = 0xc0,
        .end = 0xdf,
        .flags = IORESOURCE_BUSY
    },
};

const char *get_system_type(void)
{
    return "MIPS Malta";
}

#if defined(CONFIG_MIPS_MT_SMTC)
const char display_string[] = "       SMTC LINUX ON MALTA       ";
#else
const char display_string[] = "        LINUX ON MALTA       ";
#endif /* CONFIG_MIPS_MT_SMTC */

#ifdef CONFIG_BLK_DEV_FD
static void __init fd_activate(void)
{
    /*
     * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
     * Controller.
     * Done by YAMON 2.00 onwards
     */
    /* Entering config state. */
    SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);

    /* Activate floppy controller. */
    SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
    SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
    SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
    SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);

    /* Exit config state. */
    SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
}
#endif

#ifdef CONFIG_BLK_DEV_IDE
static void __init pci_clock_check(void)
{
    unsigned int __iomem *jmpr_p =
        (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
    int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
    static const int pciclocks[] __initconst = {
        33, 20, 25, 30, 12, 16, 37, 10
    };
    int pciclock = pciclocks[jmpr];
    char *argptr = prom_getcmdline();

    if (pciclock != 33 && !strstr(argptr, "idebus=")) {
        printk(KERN_WARNING "WARNING: PCI clock is %dMHz, "
                "setting idebus\n", pciclock);
        argptr += strlen(argptr);
        sprintf(argptr, " idebus=%d", pciclock);
        if (pciclock < 20 || pciclock > 66)
            printk(KERN_WARNING "WARNING: IDE timing "
                    "calculations will be incorrect\n");
    }
}
#endif

#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
static void __init screen_info_setup(void)
{
    screen_info = (struct screen_info) {
        .orig_x = 0,
        .orig_y = 25,
        .ext_mem_k = 0,
        .orig_video_page = 0,
        .orig_video_mode = 0,
        .orig_video_cols = 80,
        .unused2 = 0,
        .orig_video_ega_bx = 0,
        .unused3 = 0,
        .orig_video_lines = 25,
        .orig_video_isVGA = VIDEO_TYPE_VGAC,
        .orig_video_points = 16
    };
}
#endif

static void __init bonito_quirks_setup(void)
{
    char *argptr;

    argptr = prom_getcmdline();
    if (strstr(argptr, "debug")) {
        BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
        printk(KERN_INFO "Enabled Bonito debug mode\n");
    } else
        BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;

#ifdef CONFIG_DMA_COHERENT
    if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
        BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
        printk(KERN_INFO "Enabled Bonito CPU coherency\n");

        argptr = prom_getcmdline();
        if (strstr(argptr, "iobcuncached")) {
            BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
            BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
                ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
                    BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
            printk(KERN_INFO "Disabled Bonito IOBC coherency\n");
        } else {
            BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
            BONITO_PCIMEMBASECFG |=
                (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
                    BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
            printk(KERN_INFO "Enabled Bonito IOBC coherency\n");
        }
    } else
        panic("Hardware DMA cache coherency not supported");
#endif
}

void __init plat_mem_setup(void)
{
    unsigned int i;

    mips_pcibios_init();

    /* Request I/O space for devices used on the Malta board. */
    for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
        request_resource(&ioport_resource, standard_io_resources+i);

    /*
     * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
     */
    enable_dma(4);

#ifdef CONFIG_DMA_COHERENT
    if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO)
        panic("Hardware DMA cache coherency not supported");
#endif

    if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
        bonito_quirks_setup();

#ifdef CONFIG_BLK_DEV_IDE
    pci_clock_check();
#endif

#ifdef CONFIG_BLK_DEV_FD
    fd_activate();
#endif

#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
    screen_info_setup();
#endif

    board_be_init = malta_be_init;
    board_be_handler = malta_be_handler;
}