pcm970-baseboard.c

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/*
 * Copyright (C) 2008 Juergen Beisert ([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 Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/can/platform/sja1000.h>

#include <asm/mach/arch.h>

#include <mach/common.h>
#include <mach/iomux-mx27.h>
#include <mach/hardware.h>

#include "devices-imx27.h"

static const int pcm970_pins[] __initconst = {
    /* SDHC */
    PB4_PF_SD2_D0,
    PB5_PF_SD2_D1,
    PB6_PF_SD2_D2,
    PB7_PF_SD2_D3,
    PB8_PF_SD2_CMD,
    PB9_PF_SD2_CLK,
    /* display */
    PA5_PF_LSCLK,
    PA6_PF_LD0,
    PA7_PF_LD1,
    PA8_PF_LD2,
    PA9_PF_LD3,
    PA10_PF_LD4,
    PA11_PF_LD5,
    PA12_PF_LD6,
    PA13_PF_LD7,
    PA14_PF_LD8,
    PA15_PF_LD9,
    PA16_PF_LD10,
    PA17_PF_LD11,
    PA18_PF_LD12,
    PA19_PF_LD13,
    PA20_PF_LD14,
    PA21_PF_LD15,
    PA22_PF_LD16,
    PA23_PF_LD17,
    PA24_PF_REV,
    PA25_PF_CLS,
    PA26_PF_PS,
    PA27_PF_SPL_SPR,
    PA28_PF_HSYNC,
    PA29_PF_VSYNC,
    PA30_PF_CONTRAST,
    PA31_PF_OE_ACD,
    /*
     * it seems the data line misses a pullup, so we must enable
     * the internal pullup as a local workaround
     */
    PD17_PF_I2C_DATA | GPIO_PUEN,
    PD18_PF_I2C_CLK,
    /* Camera */
    PB10_PF_CSI_D0,
    PB11_PF_CSI_D1,
    PB12_PF_CSI_D2,
    PB13_PF_CSI_D3,
    PB14_PF_CSI_D4,
    PB15_PF_CSI_MCLK,
    PB16_PF_CSI_PIXCLK,
    PB17_PF_CSI_D5,
    PB18_PF_CSI_D6,
    PB19_PF_CSI_D7,
    PB20_PF_CSI_VSYNC,
    PB21_PF_CSI_HSYNC,
};

static int pcm970_sdhc2_get_ro(struct device *dev)
{
    return gpio_get_value(GPIO_PORTC + 28);
}

static int pcm970_sdhc2_init(struct device *dev, irq_handler_t detect_irq, void *data)
{
    int ret;

    ret = request_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), detect_irq,
              IRQF_TRIGGER_FALLING, "imx-mmc-detect", data);
    if (ret)
        return ret;

    ret = gpio_request(GPIO_PORTC + 28, "imx-mmc-ro");
    if (ret) {
        free_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), data);
        return ret;
    }

    gpio_direction_input(GPIO_PORTC + 28);

    return 0;
}

static void pcm970_sdhc2_exit(struct device *dev, void *data)
{
    free_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), data);
    gpio_free(GPIO_PORTC + 28);
}

static const struct imxmmc_platform_data sdhc_pdata __initconst = {
    .get_ro = pcm970_sdhc2_get_ro,
    .init = pcm970_sdhc2_init,
    .exit = pcm970_sdhc2_exit,
};

static struct imx_fb_videomode pcm970_modes[] = {
    {
        .mode = {
            .name       = "Sharp-LQ035Q7",
            .refresh    = 60,
            .xres       = 240,
            .yres       = 320,
            .pixclock   = 188679, /* in ps (5.3MHz) */
            .hsync_len  = 7,
            .left_margin    = 5,
            .right_margin   = 16,
            .vsync_len  = 1,
            .upper_margin   = 7,
            .lower_margin   = 9,
        },
        /*
         * - HSYNC active high
         * - VSYNC active high
         * - clk notenabled while idle
         * - clock not inverted
         * - data not inverted
         * - data enable low active
         * - enable sharp mode
         */
        .pcr        = 0xF00080C0,
        .bpp        = 16,
    }, {
        .mode = {
            .name       = "TX090",
            .refresh    = 60,
            .xres       = 240,
            .yres       = 320,
            .pixclock   = 38255,
            .left_margin    = 144,
            .right_margin   = 0,
            .upper_margin   = 7,
            .lower_margin   = 40,
            .hsync_len  = 96,
            .vsync_len  = 1,
        },
        /*
         * - HSYNC active low (1 << 22)
         * - VSYNC active low (1 << 23)
         * - clk notenabled while idle
         * - clock not inverted
         * - data not inverted
         * - data enable low active
         * - enable sharp mode
         */
        .pcr = 0xF0008080 | (1<<22) | (1<<23) | (1<<19),
        .bpp = 32,
    },
};

static const struct imx_fb_platform_data pcm038_fb_data __initconst = {
    .mode = pcm970_modes,
    .num_modes = ARRAY_SIZE(pcm970_modes),

    .pwmr       = 0x00A903FF,
    .lscr1      = 0x00120300,
    .dmacr      = 0x00020010,
};

static struct resource pcm970_sja1000_resources[] = {
    {
        .start   = MX27_CS4_BASE_ADDR,
        .end     = MX27_CS4_BASE_ADDR + 0x100 - 1,
        .flags   = IORESOURCE_MEM,
    }, {
        /* irq number is run-time assigned */
        .flags   = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
    },
};

static struct sja1000_platform_data pcm970_sja1000_platform_data = {
    .osc_freq   = 16000000,
    .ocr        = OCR_TX1_PULLDOWN | OCR_TX0_PUSHPULL,
    .cdr        = CDR_CBP,
};

static struct platform_device pcm970_sja1000 = {
    .name = "sja1000_platform",
    .dev = {
        .platform_data = &pcm970_sja1000_platform_data,
    },
    .resource = pcm970_sja1000_resources,
    .num_resources = ARRAY_SIZE(pcm970_sja1000_resources),
};

/*
 * system init for baseboard usage. Will be called by pcm038 init.
 *
 * Add platform devices present on this baseboard and init
 * them from CPU side as far as required to use them later on
 */
void __init pcm970_baseboard_init(void)
{
    mxc_gpio_setup_multiple_pins(pcm970_pins, ARRAY_SIZE(pcm970_pins),
            "PCM970");

    imx27_add_imx_fb(&pcm038_fb_data);
    mxc_gpio_mode(GPIO_PORTC | 28 | GPIO_GPIO | GPIO_IN);
    imx27_add_mxc_mmc(1, &sdhc_pdata);
    pcm970_sja1000_resources[1].start = gpio_to_irq(IMX_GPIO_NR(5, 19));
    pcm970_sja1000_resources[1].end = gpio_to_irq(IMX_GPIO_NR(5, 19));
    platform_device_register(&pcm970_sja1000);
}