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pcm970-baseboard.c

/*
 * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
 *
 * 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.h>
#include <mach/imxfb.h>
#include <mach/hardware.h>
#include <mach/mmc.h>

#include "devices.h"

static int pcm970_pins[] = {
      /* 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(IRQ_GPIOC(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(IRQ_GPIOC(29), data);
            return ret;
      }

      gpio_direction_input(GPIO_PORTC + 28);

      return 0;
}

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

static struct imxmmc_platform_data sdhc_pdata = {
      .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 struct imx_fb_platform_data pcm038_fb_data = {
      .mode = pcm970_modes,
      .num_modes = ARRAY_SIZE(pcm970_modes),

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

static struct resource pcm970_sja1000_resources[] = {
      {
            .start   = CS4_BASE_ADDR,
            .end     = CS4_BASE_ADDR + 0x100 - 1,
            .flags   = IORESOURCE_MEM,
      }, {
            .start   = IRQ_GPIOE(19),
            .end     = IRQ_GPIOE(19),
            .flags   = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
      },
};

struct sja1000_platform_data pcm970_sja1000_platform_data = {
      .clock            = 16000000 / 2,
      .ocr        = 0x40 | 0x18,
      .cdr        = 0x40,
};

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");

      mxc_register_device(&mxc_fb_device, &pcm038_fb_data);
      mxc_gpio_mode(GPIO_PORTC | 28 | GPIO_GPIO | GPIO_IN);
      mxc_register_device(&mxc_sdhc_device1, &sdhc_pdata);
      platform_device_register(&pcm970_sja1000);
}

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