lubbock.c

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/*
 *  linux/arch/arm/mach-pxa/lubbock.c
 *
 *  Support for the Intel DBPXA250 Development Platform.
 *
 *  Author: Nicolas Pitre
 *  Created:    Jun 15, 2001
 *  Copyright:  MontaVista Software Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/syscore_ops.h>
#include <linux/major.h>
#include <linux/fb.h>
#include <linux/interrupt.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/smc91x.h>
#include <linux/slab.h>
#include <linux/leds.h>

#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <linux/spi/pxa2xx_spi.h>

#include <asm/setup.h>
#include <asm/memory.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/sizes.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/flash.h>

#include <asm/hardware/sa1111.h>

#include <mach/pxa25x.h>
#include <mach/audio.h>
#include <mach/lubbock.h>
#include <mach/udc.h>
#include <linux/platform_data/irda-pxaficp.h>
#include <linux/platform_data/video-pxafb.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <mach/pm.h>
#include <mach/smemc.h>

#include "generic.h"
#include "clock.h"
#include "devices.h"

static unsigned long lubbock_pin_config[] __initdata = {
    GPIO15_nCS_1,   /* CS1 - Flash */
    GPIO78_nCS_2,   /* CS2 - Baseboard FGPA */
    GPIO79_nCS_3,   /* CS3 - SMC ethernet */
    GPIO80_nCS_4,   /* CS4 - SA1111 */

    /* SSP data pins */
    GPIO23_SSP1_SCLK,
    GPIO25_SSP1_TXD,
    GPIO26_SSP1_RXD,

    /* AC97 */
    GPIO28_AC97_BITCLK,
    GPIO29_AC97_SDATA_IN_0,
    GPIO30_AC97_SDATA_OUT,
    GPIO31_AC97_SYNC,

    /* LCD - 16bpp DSTN */
    GPIOxx_LCD_DSTN_16BPP,

    /* BTUART */
    GPIO42_BTUART_RXD,
    GPIO43_BTUART_TXD,
    GPIO44_BTUART_CTS,
    GPIO45_BTUART_RTS,

    /* PC Card */
    GPIO48_nPOE,
    GPIO49_nPWE,
    GPIO50_nPIOR,
    GPIO51_nPIOW,
    GPIO52_nPCE_1,
    GPIO53_nPCE_2,
    GPIO54_nPSKTSEL,
    GPIO55_nPREG,
    GPIO56_nPWAIT,
    GPIO57_nIOIS16,

    /* MMC */
    GPIO6_MMC_CLK,
    GPIO8_MMC_CS0,

    /* wakeup */
    GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
};

#define LUB_HEXLED      __LUB_REG(LUBBOCK_FPGA_PHYS + 0x010)
#define LUB_MISC_WR     __LUB_REG(LUBBOCK_FPGA_PHYS + 0x080)

void lubbock_set_hexled(uint32_t value)
{
    LUB_HEXLED = value;
}

void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
{
    unsigned long flags;

    local_irq_save(flags);
    LUB_MISC_WR = (LUB_MISC_WR & ~mask) | (set & mask);
    local_irq_restore(flags);
}
EXPORT_SYMBOL(lubbock_set_misc_wr);

static unsigned long lubbock_irq_enabled;

static void lubbock_mask_irq(struct irq_data *d)
{
    int lubbock_irq = (d->irq - LUBBOCK_IRQ(0));
    LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
}

static void lubbock_unmask_irq(struct irq_data *d)
{
    int lubbock_irq = (d->irq - LUBBOCK_IRQ(0));
    /* the irq can be acknowledged only if deasserted, so it's done here */
    LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
    LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
}

static struct irq_chip lubbock_irq_chip = {
    .name       = "FPGA",
    .irq_ack    = lubbock_mask_irq,
    .irq_mask   = lubbock_mask_irq,
    .irq_unmask = lubbock_unmask_irq,
};

static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
{
    unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
    do {
        /* clear our parent irq */
        desc->irq_data.chip->irq_ack(&desc->irq_data);
        if (likely(pending)) {
            irq = LUBBOCK_IRQ(0) + __ffs(pending);
            generic_handle_irq(irq);
        }
        pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
    } while (pending);
}

static void __init lubbock_init_irq(void)
{
    int irq;

    pxa25x_init_irq();

    /* setup extra lubbock irqs */
    for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
        irq_set_chip_and_handler(irq, &lubbock_irq_chip,
                     handle_level_irq);
        set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
    }

    irq_set_chained_handler(PXA_GPIO_TO_IRQ(0), lubbock_irq_handler);
    irq_set_irq_type(PXA_GPIO_TO_IRQ(0), IRQ_TYPE_EDGE_FALLING);
}

#ifdef CONFIG_PM

static void lubbock_irq_resume(void)
{
    LUB_IRQ_MASK_EN = lubbock_irq_enabled;
}

static struct syscore_ops lubbock_irq_syscore_ops = {
    .resume = lubbock_irq_resume,
};

static int __init lubbock_irq_device_init(void)
{
    if (machine_is_lubbock()) {
        register_syscore_ops(&lubbock_irq_syscore_ops);
        return 0;
    }
    return -ENODEV;
}

device_initcall(lubbock_irq_device_init);

#endif

static int lubbock_udc_is_connected(void)
{
    return (LUB_MISC_RD & (1 << 9)) == 0;
}

static struct pxa2xx_udc_mach_info udc_info __initdata = {
    .udc_is_connected   = lubbock_udc_is_connected,
    // no D+ pullup; lubbock can't connect/disconnect in software
};

static struct resource sa1111_resources[] = {
    [0] = {
        .start  = 0x10000000,
        .end    = 0x10001fff,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = LUBBOCK_SA1111_IRQ,
        .end    = LUBBOCK_SA1111_IRQ,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct sa1111_platform_data sa1111_info = {
    .irq_base   = LUBBOCK_SA1111_IRQ_BASE,
    .disable_devs   = SA1111_DEVID_SAC,
};

static struct platform_device sa1111_device = {
    .name       = "sa1111",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(sa1111_resources),
    .resource   = sa1111_resources,
    .dev        = {
        .platform_data  = &sa1111_info,
    },
};

/* ADS7846 is connected through SSP ... and if your board has J5 populated,
 * you can select it to replace the ucb1400 by switching the touchscreen cable
 * (to J5) and poking board registers (as done below).  Else it's only useful
 * for the temperature sensors.
 */
static struct pxa2xx_spi_master pxa_ssp_master_info = {
    .num_chipselect = 1,
};

static int lubbock_ads7846_pendown_state(void)
{
    /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
    return 0;
}

static struct ads7846_platform_data ads_info = {
    .model          = 7846,
    .vref_delay_usecs   = 100,      /* internal, no cap */
    .get_pendown_state  = lubbock_ads7846_pendown_state,
    // .x_plate_ohms        = 500,  /* GUESS! */
    // .y_plate_ohms        = 500,  /* GUESS! */
};

static void ads7846_cs(u32 command)
{
    static const unsigned   TS_nCS = 1 << 11;
    lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
}

static struct pxa2xx_spi_chip ads_hw = {
    .tx_threshold       = 1,
    .rx_threshold       = 2,
    .cs_control     = ads7846_cs,
};

static struct spi_board_info spi_board_info[] __initdata = { {
    .modalias   = "ads7846",
    .platform_data  = &ads_info,
    .controller_data = &ads_hw,
    .irq        = LUBBOCK_BB_IRQ,
    .max_speed_hz   = 120000 /* max sample rate at 3V */
                * 26 /* command + data + overhead */,
    .bus_num    = 1,
    .chip_select    = 0,
},
};

static struct resource smc91x_resources[] = {
    [0] = {
        .name   = "smc91x-regs",
        .start  = 0x0c000c00,
        .end    = 0x0c0fffff,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = LUBBOCK_ETH_IRQ,
        .end    = LUBBOCK_ETH_IRQ,
        .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
    },
    [2] = {
        .name   = "smc91x-attrib",
        .start  = 0x0e000000,
        .end    = 0x0e0fffff,
        .flags  = IORESOURCE_MEM,
    },
};

static struct smc91x_platdata lubbock_smc91x_info = {
    .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
};

static struct platform_device smc91x_device = {
    .name       = "smc91x",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(smc91x_resources),
    .resource   = smc91x_resources,
    .dev        = {
        .platform_data = &lubbock_smc91x_info,
    },
};

static struct resource flash_resources[] = {
    [0] = {
        .start  = 0x00000000,
        .end    = SZ_64M - 1,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = 0x04000000,
        .end    = 0x04000000 + SZ_64M - 1,
        .flags  = IORESOURCE_MEM,
    },
};

static struct mtd_partition lubbock_partitions[] = {
    {
        .name =     "Bootloader",
        .size =     0x00040000,
        .offset =   0,
        .mask_flags =   MTD_WRITEABLE  /* force read-only */
    },{
        .name =     "Kernel",
        .size =     0x00100000,
        .offset =   0x00040000,
    },{
        .name =     "Filesystem",
        .size =     MTDPART_SIZ_FULL,
        .offset =   0x00140000
    }
};

static struct flash_platform_data lubbock_flash_data[2] = {
    {
        .map_name   = "cfi_probe",
        .parts      = lubbock_partitions,
        .nr_parts   = ARRAY_SIZE(lubbock_partitions),
    }, {
        .map_name   = "cfi_probe",
        .parts      = NULL,
        .nr_parts   = 0,
    }
};

static struct platform_device lubbock_flash_device[2] = {
    {
        .name       = "pxa2xx-flash",
        .id     = 0,
        .dev = {
            .platform_data = &lubbock_flash_data[0],
        },
        .resource = &flash_resources[0],
        .num_resources = 1,
    },
    {
        .name       = "pxa2xx-flash",
        .id     = 1,
        .dev = {
            .platform_data = &lubbock_flash_data[1],
        },
        .resource = &flash_resources[1],
        .num_resources = 1,
    },
};

static struct platform_device *devices[] __initdata = {
    &sa1111_device,
    &smc91x_device,
    &lubbock_flash_device[0],
    &lubbock_flash_device[1],
};

static struct pxafb_mode_info sharp_lm8v31_mode = {
    .pixclock   = 270000,
    .xres       = 640,
    .yres       = 480,
    .bpp        = 16,
    .hsync_len  = 1,
    .left_margin    = 3,
    .right_margin   = 3,
    .vsync_len  = 1,
    .upper_margin   = 0,
    .lower_margin   = 0,
    .sync       = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
    .cmap_greyscale = 0,
};

static struct pxafb_mach_info sharp_lm8v31 = {
    .modes      = &sharp_lm8v31_mode,
    .num_modes  = 1,
    .cmap_inverse   = 0,
    .cmap_static    = 0,
    .lcd_conn   = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
              LCD_AC_BIAS_FREQ(255),
};

#define MMC_POLL_RATE       msecs_to_jiffies(1000)

static void lubbock_mmc_poll(unsigned long);
static irq_handler_t mmc_detect_int;

static struct timer_list mmc_timer = {
    .function   = lubbock_mmc_poll,
};

static void lubbock_mmc_poll(unsigned long data)
{
    unsigned long flags;

    /* clear any previous irq state, then ... */
    local_irq_save(flags);
    LUB_IRQ_SET_CLR &= ~(1 << 0);
    local_irq_restore(flags);

    /* poll until mmc/sd card is removed */
    if (LUB_IRQ_SET_CLR & (1 << 0))
        mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
    else {
        (void) mmc_detect_int(LUBBOCK_SD_IRQ, (void *)data);
        enable_irq(LUBBOCK_SD_IRQ);
    }
}

static irqreturn_t lubbock_detect_int(int irq, void *data)
{
    /* IRQ is level triggered; disable, and poll for removal */
    disable_irq(irq);
    mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);

    return mmc_detect_int(irq, data);
}

static int lubbock_mci_init(struct device *dev,
        irq_handler_t detect_int,
        void *data)
{
    /* detect card insert/eject */
    mmc_detect_int = detect_int;
    init_timer(&mmc_timer);
    mmc_timer.data = (unsigned long) data;
    return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
               0, "lubbock-sd-detect", data);
}

static int lubbock_mci_get_ro(struct device *dev)
{
    return (LUB_MISC_RD & (1 << 2)) != 0;
}

static void lubbock_mci_exit(struct device *dev, void *data)
{
    free_irq(LUBBOCK_SD_IRQ, data);
    del_timer_sync(&mmc_timer);
}

static struct pxamci_platform_data lubbock_mci_platform_data = {
    .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
    .detect_delay_ms    = 10,
    .init           = lubbock_mci_init,
    .get_ro         = lubbock_mci_get_ro,
    .exit           = lubbock_mci_exit,
    .gpio_card_detect   = -1,
    .gpio_card_ro       = -1,
    .gpio_power     = -1,
};

static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
{
    unsigned long flags;

    local_irq_save(flags);
    if (mode & IR_SIRMODE) {
        LUB_MISC_WR &= ~(1 << 4);
    } else if (mode & IR_FIRMODE) {
        LUB_MISC_WR |= 1 << 4;
    }
    pxa2xx_transceiver_mode(dev, mode);
    local_irq_restore(flags);
}

static struct pxaficp_platform_data lubbock_ficp_platform_data = {
    .gpio_pwdown        = -1,
    .transceiver_cap    = IR_SIRMODE | IR_FIRMODE,
    .transceiver_mode   = lubbock_irda_transceiver_mode,
};

static void __init lubbock_init(void)
{
    int flashboot = (LUB_CONF_SWITCHES & 1);

    pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));

    pxa_set_ffuart_info(NULL);
    pxa_set_btuart_info(NULL);
    pxa_set_stuart_info(NULL);

    clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
    pxa_set_udc_info(&udc_info);
    pxa_set_fb_info(NULL, &sharp_lm8v31);
    pxa_set_mci_info(&lubbock_mci_platform_data);
    pxa_set_ficp_info(&lubbock_ficp_platform_data);
    pxa_set_ac97_info(NULL);

    lubbock_flash_data[0].width = lubbock_flash_data[1].width =
        (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
    /* Compensate for the nROMBT switch which swaps the flash banks */
    printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
           flashboot?"Flash":"ROM", flashboot);

    lubbock_flash_data[flashboot^1].name = "application-flash";
    lubbock_flash_data[flashboot].name = "boot-rom";
    (void) platform_add_devices(devices, ARRAY_SIZE(devices));

    pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
    spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
}

static struct map_desc lubbock_io_desc[] __initdata = {
    {   /* CPLD */
        .virtual    =  LUBBOCK_FPGA_VIRT,
        .pfn        = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
        .length     = 0x00100000,
        .type       = MT_DEVICE
    }
};

static void __init lubbock_map_io(void)
{
    pxa25x_map_io();
    iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));

    PCFR |= PCFR_OPDE;
}

/*
 * Driver for the 8 discrete LEDs available for general use:
 * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
 * so be sure to not monkey with them here.
 */

#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
struct lubbock_led {
    struct led_classdev cdev;
    u8          mask;
};

/*
 * The triggers lines up below will only be used if the
 * LED triggers are compiled in.
 */
static const struct {
    const char *name;
    const char *trigger;
} lubbock_leds[] = {
    { "lubbock:D28", "default-on", },
    { "lubbock:D27", "cpu0", },
    { "lubbock:D26", "heartbeat" },
    { "lubbock:D25", },
    { "lubbock:D24", },
    { "lubbock:D23", },
    { "lubbock:D22", },
    { "lubbock:D21", },
};

static void lubbock_led_set(struct led_classdev *cdev,
                  enum led_brightness b)
{
    struct lubbock_led *led = container_of(cdev,
                     struct lubbock_led, cdev);
    u32 reg = LUB_DISC_BLNK_LED;

    if (b != LED_OFF)
        reg |= led->mask;
    else
        reg &= ~led->mask;

    LUB_DISC_BLNK_LED = reg;
}

static enum led_brightness lubbock_led_get(struct led_classdev *cdev)
{
    struct lubbock_led *led = container_of(cdev,
                     struct lubbock_led, cdev);
    u32 reg = LUB_DISC_BLNK_LED;

    return (reg & led->mask) ? LED_FULL : LED_OFF;
}

static int __init lubbock_leds_init(void)
{
    int i;

    if (!machine_is_lubbock())
        return -ENODEV;

    /* All ON */
    LUB_DISC_BLNK_LED |= 0xff;
    for (i = 0; i < ARRAY_SIZE(lubbock_leds); i++) {
        struct lubbock_led *led;

        led = kzalloc(sizeof(*led), GFP_KERNEL);
        if (!led)
            break;

        led->cdev.name = lubbock_leds[i].name;
        led->cdev.brightness_set = lubbock_led_set;
        led->cdev.brightness_get = lubbock_led_get;
        led->cdev.default_trigger = lubbock_leds[i].trigger;
        led->mask = BIT(i);

        if (led_classdev_register(NULL, &led->cdev) < 0) {
            kfree(led);
            break;
        }
    }

    return 0;
}

/*
 * Since we may have triggers on any subsystem, defer registration
 * until after subsystem_init.
 */
fs_initcall(lubbock_leds_init);
#endif

MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
    /* Maintainer: MontaVista Software Inc. */
    .map_io     = lubbock_map_io,
    .nr_irqs    = LUBBOCK_NR_IRQS,
    .init_irq   = lubbock_init_irq,
    .handle_irq = pxa25x_handle_irq,
    .timer      = &pxa_timer,
    .init_machine   = lubbock_init,
    .restart    = pxa_restart,
MACHINE_END