setup.c

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/*
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  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.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Copyright 2001 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *              [email protected]
 *
 * Copyright (C) 2000-2001 Toshiba Corporation
 * Copyright (C) 2007 Ralf Baechle ([email protected])
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <asm/reboot.h>
#include <asm/txx9pio.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/pci.h>
#include <asm/txx9/jmr3927.h>
#include <asm/mipsregs.h>

static void jmr3927_machine_restart(char *command)
{
    local_irq_disable();
#if 1   /* Resetting PCI bus */
    jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
    jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI, JMR3927_IOC_RESET_ADDR);
    (void)jmr3927_ioc_reg_in(JMR3927_IOC_RESET_ADDR);   /* flush WB */
    mdelay(1);
    jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
#endif
    jmr3927_ioc_reg_out(JMR3927_IOC_RESET_CPU, JMR3927_IOC_RESET_ADDR);
    /* fallback */
    (*_machine_halt)();
}

static void __init jmr3927_time_init(void)
{
    tx3927_time_init(0, 1);
}

#define DO_WRITE_THROUGH

static void jmr3927_board_init(void);

static void __init jmr3927_mem_setup(void)
{
    set_io_port_base(JMR3927_PORT_BASE + JMR3927_PCIIO);

    _machine_restart = jmr3927_machine_restart;

    /* cache setup */
    {
        unsigned int conf;
#ifdef DO_WRITE_THROUGH
        int mips_config_cwfon = 0;
        int mips_config_wbon = 0;
#else
        int mips_config_cwfon = 1;
        int mips_config_wbon = 1;
#endif

        conf = read_c0_conf();
        conf &= ~(TX39_CONF_WBON | TX39_CONF_CWFON);
        conf |= mips_config_wbon ? TX39_CONF_WBON : 0;
        conf |= mips_config_cwfon ? TX39_CONF_CWFON : 0;

        write_c0_conf(conf);
        write_c0_cache(0);
    }

    /* initialize board */
    jmr3927_board_init();

    tx3927_sio_init(0, 1 << 1); /* ch1: noCTS */
}

static void __init jmr3927_pci_setup(void)
{
#ifdef CONFIG_PCI
    int extarb = !(tx3927_ccfgptr->ccfg & TX3927_CCFG_PCIXARB);
    struct pci_controller *c;

    c = txx9_alloc_pci_controller(&txx9_primary_pcic,
                      JMR3927_PCIMEM, JMR3927_PCIMEM_SIZE,
                      JMR3927_PCIIO, JMR3927_PCIIO_SIZE);
    register_pci_controller(c);
    if (!extarb) {
        /* Reset PCI Bus */
        jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
        udelay(100);
        jmr3927_ioc_reg_out(JMR3927_IOC_RESET_PCI,
                    JMR3927_IOC_RESET_ADDR);
        udelay(100);
        jmr3927_ioc_reg_out(0, JMR3927_IOC_RESET_ADDR);
    }
    tx3927_pcic_setup(c, JMR3927_SDRAM_SIZE, extarb);
    tx3927_setup_pcierr_irq();
#endif /* CONFIG_PCI */
}

static void __init jmr3927_board_init(void)
{
    txx9_cpu_clock = JMR3927_CORECLK;
    /* SDRAMC are configured by PROM */

    /* ROMC */
    tx3927_romcptr->cr[1] = JMR3927_ROMCE1 | 0x00030048;
    tx3927_romcptr->cr[2] = JMR3927_ROMCE2 | 0x000064c8;
    tx3927_romcptr->cr[3] = JMR3927_ROMCE3 | 0x0003f698;
    tx3927_romcptr->cr[5] = JMR3927_ROMCE5 | 0x0000f218;

    /* Pin selection */
    tx3927_ccfgptr->pcfg &= ~TX3927_PCFG_SELALL;
    tx3927_ccfgptr->pcfg |=
        TX3927_PCFG_SELSIOC(0) | TX3927_PCFG_SELSIO_ALL |
        (TX3927_PCFG_SELDMA_ALL & ~TX3927_PCFG_SELDMA(1));

    tx3927_setup();

    /* PIO[15:12] connected to LEDs */
    __raw_writel(0x0000f000, &tx3927_pioptr->dir);
    gpio_request(11, "dipsw1");
    gpio_request(10, "dipsw2");

    jmr3927_pci_setup();

    /* SIO0 DTR on */
    jmr3927_ioc_reg_out(0, JMR3927_IOC_DTR_ADDR);

    jmr3927_led_set(0);

    printk(KERN_INFO
           "JMR-TX3927 (Rev %d) --- IOC(Rev %d) DIPSW:%d,%d,%d,%d\n",
           jmr3927_ioc_reg_in(JMR3927_IOC_BREV_ADDR) & JMR3927_REV_MASK,
           jmr3927_ioc_reg_in(JMR3927_IOC_REV_ADDR) & JMR3927_REV_MASK,
           jmr3927_dipsw1(), jmr3927_dipsw2(),
           jmr3927_dipsw3(), jmr3927_dipsw4());
}

/* This trick makes rtc-ds1742 driver usable as is. */
static unsigned long jmr3927_swizzle_addr_b(unsigned long port)
{
    if ((port & 0xffff0000) != JMR3927_IOC_NVRAMB_ADDR)
        return port;
    port = (port & 0xffff0000) | (port & 0x7fff << 1);
#ifdef __BIG_ENDIAN
    return port;
#else
    return port | 1;
#endif
}

static void __init jmr3927_rtc_init(void)
{
    static struct resource __initdata res = {
        .start  = JMR3927_IOC_NVRAMB_ADDR - IO_BASE,
        .end    = JMR3927_IOC_NVRAMB_ADDR - IO_BASE + 0x800 - 1,
        .flags  = IORESOURCE_MEM,
    };
    platform_device_register_simple("rtc-ds1742", -1, &res, 1);
}

static void __init jmr3927_mtd_init(void)
{
    int i;

    for (i = 0; i < 2; i++)
        tx3927_mtd_init(i);
}

static void __init jmr3927_device_init(void)
{
    unsigned long iocled_base = JMR3927_IOC_LED_ADDR - IO_BASE;
#ifdef __LITTLE_ENDIAN
    iocled_base |= 1;
#endif
    __swizzle_addr_b = jmr3927_swizzle_addr_b;
    jmr3927_rtc_init();
    tx3927_wdt_init();
    jmr3927_mtd_init();
    txx9_iocled_init(iocled_base, -1, 8, 1, "green", NULL);
}

struct txx9_board_vec jmr3927_vec __initdata = {
    .system = "Toshiba JMR_TX3927",
    .prom_init = jmr3927_prom_init,
    .mem_setup = jmr3927_mem_setup,
    .irq_setup = jmr3927_irq_setup,
    .time_init = jmr3927_time_init,
    .device_init = jmr3927_device_init,
#ifdef CONFIG_PCI
    .pci_map_irq = jmr3927_pci_map_irq,
#endif
};