db1000.c

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/*
 * DBAu1000/1500/1100 PBAu1100/1500 board support
 *
 * Copyright 2000, 2008 MontaVista Software Inc.
 * Author: MontaVista Software, Inc. <[email protected]>
 *
 * 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 program is distributed in the hope that 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <linux/dma-mapping.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/leds.h>
#include <linux/mmc/host.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_gpio.h>
#include <linux/spi/ads7846.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/au1000_dma.h>
#include <asm/mach-au1x00/au1100_mmc.h>
#include <asm/mach-db1x00/bcsr.h>
#include <asm/reboot.h>
#include <prom.h>
#include "platform.h"

#define F_SWAPPED (bcsr_read(BCSR_STATUS) & BCSR_STATUS_DB1000_SWAPBOOT)

struct pci_dev;

static const char *board_type_str(void)
{
    switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
    case BCSR_WHOAMI_DB1000:
        return "DB1000";
    case BCSR_WHOAMI_DB1500:
        return "DB1500";
    case BCSR_WHOAMI_DB1100:
        return "DB1100";
    case BCSR_WHOAMI_PB1500:
    case BCSR_WHOAMI_PB1500R2:
        return "PB1500";
    case BCSR_WHOAMI_PB1100:
        return "PB1100";
    default:
        return "(unknown)";
    }
}

const char *get_system_type(void)
{
    return board_type_str();
}

void __init board_setup(void)
{
    /* initialize board register space */
    bcsr_init(DB1000_BCSR_PHYS_ADDR,
          DB1000_BCSR_PHYS_ADDR + DB1000_BCSR_HEXLED_OFS);

    printk(KERN_INFO "AMD Alchemy %s Board\n", board_type_str());
}


static int db1500_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
{
    if ((slot < 12) || (slot > 13) || pin == 0)
        return -1;
    if (slot == 12)
        return (pin == 1) ? AU1500_PCI_INTA : 0xff;
    if (slot == 13) {
        switch (pin) {
        case 1: return AU1500_PCI_INTA;
        case 2: return AU1500_PCI_INTB;
        case 3: return AU1500_PCI_INTC;
        case 4: return AU1500_PCI_INTD;
        }
    }
    return -1;
}

static struct resource alchemy_pci_host_res[] = {
    [0] = {
        .start  = AU1500_PCI_PHYS_ADDR,
        .end    = AU1500_PCI_PHYS_ADDR + 0xfff,
        .flags  = IORESOURCE_MEM,
    },
};

static struct alchemy_pci_platdata db1500_pci_pd = {
    .board_map_irq  = db1500_map_pci_irq,
};

static struct platform_device db1500_pci_host_dev = {
    .dev.platform_data = &db1500_pci_pd,
    .name       = "alchemy-pci",
    .id     = 0,
    .num_resources  = ARRAY_SIZE(alchemy_pci_host_res),
    .resource   = alchemy_pci_host_res,
};

static int __init db1500_pci_init(void)
{
    int id = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
    if ((id == BCSR_WHOAMI_DB1500) || (id == BCSR_WHOAMI_PB1500) ||
        (id == BCSR_WHOAMI_PB1500R2))
        return platform_device_register(&db1500_pci_host_dev);
    return 0;
}
/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
arch_initcall(db1500_pci_init);


static struct resource au1100_lcd_resources[] = {
    [0] = {
        .start  = AU1100_LCD_PHYS_ADDR,
        .end    = AU1100_LCD_PHYS_ADDR + 0x800 - 1,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = AU1100_LCD_INT,
        .end    = AU1100_LCD_INT,
        .flags  = IORESOURCE_IRQ,
    }
};

static u64 au1100_lcd_dmamask = DMA_BIT_MASK(32);

static struct platform_device au1100_lcd_device = {
    .name       = "au1100-lcd",
    .id     = 0,
    .dev = {
        .dma_mask       = &au1100_lcd_dmamask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
    },
    .num_resources  = ARRAY_SIZE(au1100_lcd_resources),
    .resource   = au1100_lcd_resources,
};

static struct resource alchemy_ac97c_res[] = {
    [0] = {
        .start  = AU1000_AC97_PHYS_ADDR,
        .end    = AU1000_AC97_PHYS_ADDR + 0xfff,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = DMA_ID_AC97C_TX,
        .end    = DMA_ID_AC97C_TX,
        .flags  = IORESOURCE_DMA,
    },
    [2] = {
        .start  = DMA_ID_AC97C_RX,
        .end    = DMA_ID_AC97C_RX,
        .flags  = IORESOURCE_DMA,
    },
};

static struct platform_device alchemy_ac97c_dev = {
    .name       = "alchemy-ac97c",
    .id     = -1,
    .resource   = alchemy_ac97c_res,
    .num_resources  = ARRAY_SIZE(alchemy_ac97c_res),
};

static struct platform_device alchemy_ac97c_dma_dev = {
    .name       = "alchemy-pcm-dma",
    .id     = 0,
};

static struct platform_device db1x00_codec_dev = {
    .name       = "ac97-codec",
    .id     = -1,
};

static struct platform_device db1x00_audio_dev = {
    .name       = "db1000-audio",
};

/******************************************************************************/

static irqreturn_t db1100_mmc_cd(int irq, void *ptr)
{
    void (*mmc_cd)(struct mmc_host *, unsigned long);
    /* link against CONFIG_MMC=m */
    mmc_cd = symbol_get(mmc_detect_change);
    mmc_cd(ptr, msecs_to_jiffies(500));
    symbol_put(mmc_detect_change);

    return IRQ_HANDLED;
}

static int db1100_mmc_cd_setup(void *mmc_host, int en)
{
    int ret = 0, irq;

    if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
        irq = AU1100_GPIO19_INT;
    else
        irq = AU1100_GPIO14_INT;    /* PB1100 SD0 CD# */

    if (en) {
        irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
        ret = request_irq(irq, db1100_mmc_cd, 0,
                  "sd0_cd", mmc_host);
    } else
        free_irq(irq, mmc_host);
    return ret;
}

static int db1100_mmc1_cd_setup(void *mmc_host, int en)
{
    int ret = 0, irq;

    if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
        irq = AU1100_GPIO20_INT;
    else
        irq = AU1100_GPIO15_INT;    /* PB1100 SD1 CD# */

    if (en) {
        irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH);
        ret = request_irq(irq, db1100_mmc_cd, 0,
                  "sd1_cd", mmc_host);
    } else
        free_irq(irq, mmc_host);
    return ret;
}

static int db1100_mmc_card_readonly(void *mmc_host)
{
    /* testing suggests that this bit is inverted */
    return (bcsr_read(BCSR_STATUS) & BCSR_STATUS_SD0WP) ? 0 : 1;
}

static int db1100_mmc_card_inserted(void *mmc_host)
{
    return !alchemy_gpio_get_value(19);
}

static void db1100_mmc_set_power(void *mmc_host, int state)
{
    int bit;

    if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
        bit = BCSR_BOARD_SD0PWR;
    else
        bit = BCSR_BOARD_PB1100_SD0PWR;

    if (state) {
        bcsr_mod(BCSR_BOARD, 0, bit);
        msleep(400);    /* stabilization time */
    } else
        bcsr_mod(BCSR_BOARD, bit, 0);
}

static void db1100_mmcled_set(struct led_classdev *led, enum led_brightness b)
{
    if (b != LED_OFF)
        bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED0, 0);
    else
        bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED0);
}

static struct led_classdev db1100_mmc_led = {
    .brightness_set = db1100_mmcled_set,
};

static int db1100_mmc1_card_readonly(void *mmc_host)
{
    return (bcsr_read(BCSR_BOARD) & BCSR_BOARD_SD1WP) ? 1 : 0;
}

static int db1100_mmc1_card_inserted(void *mmc_host)
{
    return !alchemy_gpio_get_value(20);
}

static void db1100_mmc1_set_power(void *mmc_host, int state)
{
    int bit;

    if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1100)
        bit = BCSR_BOARD_SD1PWR;
    else
        bit = BCSR_BOARD_PB1100_SD1PWR;

    if (state) {
        bcsr_mod(BCSR_BOARD, 0, bit);
        msleep(400);    /* stabilization time */
    } else
        bcsr_mod(BCSR_BOARD, bit, 0);
}

static void db1100_mmc1led_set(struct led_classdev *led, enum led_brightness b)
{
    if (b != LED_OFF)
        bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED1, 0);
    else
        bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED1);
}

static struct led_classdev db1100_mmc1_led = {
    .brightness_set = db1100_mmc1led_set,
};

static struct au1xmmc_platform_data db1100_mmc_platdata[2] = {
    [0] = {
        .cd_setup   = db1100_mmc_cd_setup,
        .set_power  = db1100_mmc_set_power,
        .card_inserted  = db1100_mmc_card_inserted,
        .card_readonly  = db1100_mmc_card_readonly,
        .led        = &db1100_mmc_led,
    },
    [1] = {
        .cd_setup   = db1100_mmc1_cd_setup,
        .set_power  = db1100_mmc1_set_power,
        .card_inserted  = db1100_mmc1_card_inserted,
        .card_readonly  = db1100_mmc1_card_readonly,
        .led        = &db1100_mmc1_led,
    },
};

static struct resource au1100_mmc0_resources[] = {
    [0] = {
        .start  = AU1100_SD0_PHYS_ADDR,
        .end    = AU1100_SD0_PHYS_ADDR + 0xfff,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = AU1100_SD_INT,
        .end    = AU1100_SD_INT,
        .flags  = IORESOURCE_IRQ,
    },
    [2] = {
        .start  = DMA_ID_SD0_TX,
        .end    = DMA_ID_SD0_TX,
        .flags  = IORESOURCE_DMA,
    },
    [3] = {
        .start  = DMA_ID_SD0_RX,
        .end    = DMA_ID_SD0_RX,
        .flags  = IORESOURCE_DMA,
    }
};

static u64 au1xxx_mmc_dmamask =  DMA_BIT_MASK(32);

static struct platform_device db1100_mmc0_dev = {
    .name       = "au1xxx-mmc",
    .id     = 0,
    .dev = {
        .dma_mask       = &au1xxx_mmc_dmamask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
        .platform_data      = &db1100_mmc_platdata[0],
    },
    .num_resources  = ARRAY_SIZE(au1100_mmc0_resources),
    .resource   = au1100_mmc0_resources,
};

static struct resource au1100_mmc1_res[] = {
    [0] = {
        .start  = AU1100_SD1_PHYS_ADDR,
        .end    = AU1100_SD1_PHYS_ADDR + 0xfff,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = AU1100_SD_INT,
        .end    = AU1100_SD_INT,
        .flags  = IORESOURCE_IRQ,
    },
    [2] = {
        .start  = DMA_ID_SD1_TX,
        .end    = DMA_ID_SD1_TX,
        .flags  = IORESOURCE_DMA,
    },
    [3] = {
        .start  = DMA_ID_SD1_RX,
        .end    = DMA_ID_SD1_RX,
        .flags  = IORESOURCE_DMA,
    }
};

static struct platform_device db1100_mmc1_dev = {
    .name       = "au1xxx-mmc",
    .id     = 1,
    .dev = {
        .dma_mask       = &au1xxx_mmc_dmamask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
        .platform_data      = &db1100_mmc_platdata[1],
    },
    .num_resources  = ARRAY_SIZE(au1100_mmc1_res),
    .resource   = au1100_mmc1_res,
};

/******************************************************************************/

static void db1000_irda_set_phy_mode(int mode)
{
    unsigned short mask = BCSR_RESETS_IRDA_MODE_MASK | BCSR_RESETS_FIR_SEL;

    switch (mode) {
    case AU1000_IRDA_PHY_MODE_OFF:
        bcsr_mod(BCSR_RESETS, mask, BCSR_RESETS_IRDA_MODE_OFF);
        break;
    case AU1000_IRDA_PHY_MODE_SIR:
        bcsr_mod(BCSR_RESETS, mask, BCSR_RESETS_IRDA_MODE_FULL);
        break;
    case AU1000_IRDA_PHY_MODE_FIR:
        bcsr_mod(BCSR_RESETS, mask, BCSR_RESETS_IRDA_MODE_FULL |
                        BCSR_RESETS_FIR_SEL);
        break;
    }
}

static struct au1k_irda_platform_data db1000_irda_platdata = {
    .set_phy_mode   = db1000_irda_set_phy_mode,
};

static struct resource au1000_irda_res[] = {
    [0] = {
        .start  = AU1000_IRDA_PHYS_ADDR,
        .end    = AU1000_IRDA_PHYS_ADDR + 0x0fff,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = AU1000_IRDA_TX_INT,
        .end    = AU1000_IRDA_TX_INT,
        .flags  = IORESOURCE_IRQ,
    },
    [2] = {
        .start  = AU1000_IRDA_RX_INT,
        .end    = AU1000_IRDA_RX_INT,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct platform_device db1000_irda_dev = {
    .name   = "au1000-irda",
    .id = -1,
    .dev    = {
        .platform_data = &db1000_irda_platdata,
    },
    .resource   = au1000_irda_res,
    .num_resources  = ARRAY_SIZE(au1000_irda_res),
};

/******************************************************************************/

static struct ads7846_platform_data db1100_touch_pd = {
    .model      = 7846,
    .vref_mv    = 3300,
    .gpio_pendown   = 21,
};

static struct spi_gpio_platform_data db1100_spictl_pd = {
    .sck        = 209,
    .mosi       = 208,
    .miso       = 207,
    .num_chipselect = 1,
};

static struct spi_board_info db1100_spi_info[] __initdata = {
    [0] = {
        .modalias    = "ads7846",
        .max_speed_hz    = 3250000,
        .bus_num     = 0,
        .chip_select     = 0,
        .mode        = 0,
        .irq         = AU1100_GPIO21_INT,
        .platform_data   = &db1100_touch_pd,
        .controller_data = (void *)210, /* for spi_gpio: CS# GPIO210 */
    },
};

static struct platform_device db1100_spi_dev = {
    .name       = "spi_gpio",
    .id     = 0,
    .dev        = {
        .platform_data  = &db1100_spictl_pd,
    },
};


static struct platform_device *db1x00_devs[] = {
    &db1x00_codec_dev,
    &alchemy_ac97c_dma_dev,
    &alchemy_ac97c_dev,
    &db1x00_audio_dev,
};

static struct platform_device *db1000_devs[] = {
    &db1000_irda_dev,
};

static struct platform_device *db1100_devs[] = {
    &au1100_lcd_device,
    &db1100_mmc0_dev,
    &db1100_mmc1_dev,
    &db1000_irda_dev,
};

static int __init db1000_dev_init(void)
{
    int board = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
    int c0, c1, d0, d1, s0, s1, flashsize = 32,  twosocks = 1;
    unsigned long pfc;

    if (board == BCSR_WHOAMI_DB1500) {
        c0 = AU1500_GPIO2_INT;
        c1 = AU1500_GPIO5_INT;
        d0 = AU1500_GPIO0_INT;
        d1 = AU1500_GPIO3_INT;
        s0 = AU1500_GPIO1_INT;
        s1 = AU1500_GPIO4_INT;
    } else if (board == BCSR_WHOAMI_DB1100) {
        c0 = AU1100_GPIO2_INT;
        c1 = AU1100_GPIO5_INT;
        d0 = AU1100_GPIO0_INT;
        d1 = AU1100_GPIO3_INT;
        s0 = AU1100_GPIO1_INT;
        s1 = AU1100_GPIO4_INT;

        gpio_direction_input(19);   /* sd0 cd# */
        gpio_direction_input(20);   /* sd1 cd# */
        gpio_direction_input(21);   /* touch pendown# */
        gpio_direction_input(207);  /* SPI MISO */
        gpio_direction_output(208, 0);  /* SPI MOSI */
        gpio_direction_output(209, 1);  /* SPI SCK */
        gpio_direction_output(210, 1);  /* SPI CS# */

        /* spi_gpio on SSI0 pins */
        pfc = __raw_readl((void __iomem *)SYS_PINFUNC);
        pfc |= (1 << 0);    /* SSI0 pins as GPIOs */
        __raw_writel(pfc, (void __iomem *)SYS_PINFUNC);
        wmb();

        spi_register_board_info(db1100_spi_info,
                    ARRAY_SIZE(db1100_spi_info));

        platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs));
        platform_device_register(&db1100_spi_dev);
    } else if (board == BCSR_WHOAMI_DB1000) {
        c0 = AU1000_GPIO2_INT;
        c1 = AU1000_GPIO5_INT;
        d0 = AU1000_GPIO0_INT;
        d1 = AU1000_GPIO3_INT;
        s0 = AU1000_GPIO1_INT;
        s1 = AU1000_GPIO4_INT;
        platform_add_devices(db1000_devs, ARRAY_SIZE(db1000_devs));
    } else if ((board == BCSR_WHOAMI_PB1500) ||
           (board == BCSR_WHOAMI_PB1500R2)) {
        c0 = AU1500_GPIO203_INT;
        d0 = AU1500_GPIO201_INT;
        s0 = AU1500_GPIO202_INT;
        twosocks = 0;
        flashsize = 64;
        /* RTC and daughtercard irqs */
        irq_set_irq_type(AU1500_GPIO204_INT, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(AU1500_GPIO205_INT, IRQ_TYPE_LEVEL_LOW);
        /* EPSON S1D13806 0x1b000000
         * SRAM 1MB/2MB   0x1a000000
         * DS1693 RTC     0x0c000000
         */
    } else if (board == BCSR_WHOAMI_PB1100) {
        c0 = AU1100_GPIO11_INT;
        d0 = AU1100_GPIO9_INT;
        s0 = AU1100_GPIO10_INT;
        twosocks = 0;
        flashsize = 64;
        /* pendown, rtc, daughtercard irqs */
        irq_set_irq_type(AU1100_GPIO8_INT, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(AU1100_GPIO12_INT, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(AU1100_GPIO13_INT, IRQ_TYPE_LEVEL_LOW);
        /* EPSON S1D13806 0x1b000000
         * SRAM 1MB/2MB   0x1a000000
         * DiskOnChip     0x0d000000
         * DS1693 RTC     0x0c000000
         */
        platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs));
    } else
        return 0; /* unknown board, no further dev setup to do */

    irq_set_irq_type(d0, IRQ_TYPE_EDGE_BOTH);
    irq_set_irq_type(c0, IRQ_TYPE_LEVEL_LOW);
    irq_set_irq_type(s0, IRQ_TYPE_LEVEL_LOW);

    db1x_register_pcmcia_socket(
        AU1000_PCMCIA_ATTR_PHYS_ADDR,
        AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x000400000 - 1,
        AU1000_PCMCIA_MEM_PHYS_ADDR,
        AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x000400000 - 1,
        AU1000_PCMCIA_IO_PHYS_ADDR,
        AU1000_PCMCIA_IO_PHYS_ADDR   + 0x000010000 - 1,
        c0, d0, /*s0*/0, 0, 0);

    if (twosocks) {
        irq_set_irq_type(d1, IRQ_TYPE_EDGE_BOTH);
        irq_set_irq_type(c1, IRQ_TYPE_LEVEL_LOW);
        irq_set_irq_type(s1, IRQ_TYPE_LEVEL_LOW);

        db1x_register_pcmcia_socket(
            AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x004000000,
            AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x004400000 - 1,
            AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x004000000,
            AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x004400000 - 1,
            AU1000_PCMCIA_IO_PHYS_ADDR   + 0x004000000,
            AU1000_PCMCIA_IO_PHYS_ADDR   + 0x004010000 - 1,
            c1, d1, /*s1*/0, 0, 1);
    }

    platform_add_devices(db1x00_devs, ARRAY_SIZE(db1x00_devs));
    db1x_register_norflash(flashsize << 20, 4 /* 32bit */, F_SWAPPED);
    return 0;
}
device_initcall(db1000_dev_init);