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palmtx.c

/*
 * Hardware definitions for PalmTX
 *
 * Author:     Marek Vasut <marek.vasut@gmail.com>
 *
 * Based on work of:
 *          Alex Osborne <ato@meshy.org>
 *          Cristiano P. <cristianop@users.sourceforge.net>
 *          Jan Herman <2hp@seznam.cz>
 *          Michal Hrusecky
 *
 * 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.
 *
 * (find more info at www.hackndev.com)
 *
 */

#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/pda_power.h>
#include <linux/pwm_backlight.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <mach/audio.h>
#include <mach/palmtx.h>
#include <mach/mmc.h>
#include <mach/pxafb.h>
#include <mach/pxa-regs.h>
#include <mach/mfp-pxa27x.h>
#include <mach/irda.h>
#include <mach/pxa27x_keypad.h>
#include <mach/udc.h>

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

/******************************************************************************
 * Pin configuration
 ******************************************************************************/
static unsigned long palmtx_pin_config[] __initdata = {
      /* MMC */
      GPIO32_MMC_CLK,
      GPIO92_MMC_DAT_0,
      GPIO109_MMC_DAT_1,
      GPIO110_MMC_DAT_2,
      GPIO111_MMC_DAT_3,
      GPIO112_MMC_CMD,

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

      /* IrDA */
      GPIO46_FICP_RXD,
      GPIO47_FICP_TXD,

      /* PWM */
      GPIO16_PWM0_OUT,

      /* USB */
      GPIO13_GPIO,

      /* PCMCIA */
      GPIO48_nPOE,
      GPIO49_nPWE,
      GPIO50_nPIOR,
      GPIO51_nPIOW,
      GPIO85_nPCE_1,
      GPIO54_nPCE_2,
      GPIO79_PSKTSEL,
      GPIO55_nPREG,
      GPIO56_nPWAIT,
      GPIO57_nIOIS16,
};

/******************************************************************************
 * SD/MMC card controller
 ******************************************************************************/
static int palmtx_mci_init(struct device *dev, irq_handler_t palmtx_detect_int,
                        void *data)
{
      int err = 0;

      /* Setup an interrupt for detecting card insert/remove events */
      err = request_irq(IRQ_GPIO_PALMTX_SD_DETECT_N, palmtx_detect_int,
                  IRQF_DISABLED | IRQF_SAMPLE_RANDOM |
                  IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
                  "SD/MMC card detect", data);
      if (err) {
            printk(KERN_ERR "%s: cannot request SD/MMC card detect IRQ\n",
                        __func__);
            return err;
      }

      err = gpio_request(GPIO_NR_PALMTX_SD_POWER, "SD_POWER");
      if (err)
            goto pwr_err;

      err = gpio_request(GPIO_NR_PALMTX_SD_READONLY, "SD_READONLY");
      if (err)
            goto ro_err;

      printk(KERN_DEBUG "%s: irq registered\n", __func__);

      return 0;

ro_err:
      gpio_free(GPIO_NR_PALMTX_SD_POWER);
pwr_err:
      free_irq(IRQ_GPIO_PALMTX_SD_DETECT_N, data);
      return err;
}

static void palmtx_mci_exit(struct device *dev, void *data)
{
      gpio_free(GPIO_NR_PALMTX_SD_READONLY);
      gpio_free(GPIO_NR_PALMTX_SD_POWER);
      free_irq(IRQ_GPIO_PALMTX_SD_DETECT_N, data);
}

static void palmtx_mci_power(struct device *dev, unsigned int vdd)
{
      struct pxamci_platform_data *p_d = dev->platform_data;
      gpio_set_value(GPIO_NR_PALMTX_SD_POWER, p_d->ocr_mask & (1 << vdd));
}

static int palmtx_mci_get_ro(struct device *dev)
{
      return gpio_get_value(GPIO_NR_PALMTX_SD_READONLY);
}

static struct pxamci_platform_data palmtx_mci_platform_data = {
      .ocr_mask   = MMC_VDD_32_33 | MMC_VDD_33_34,
      .setpower   = palmtx_mci_power,
      .get_ro           = palmtx_mci_get_ro,
      .init             = palmtx_mci_init,
      .exit       = palmtx_mci_exit,
};

/******************************************************************************
 * GPIO keyboard
 ******************************************************************************/
static unsigned int palmtx_matrix_keys[] = {
      KEY(0, 0, KEY_POWER),
      KEY(0, 1, KEY_F1),
      KEY(0, 2, KEY_ENTER),

      KEY(1, 0, KEY_F2),
      KEY(1, 1, KEY_F3),
      KEY(1, 2, KEY_F4),

      KEY(2, 0, KEY_UP),
      KEY(2, 2, KEY_DOWN),

      KEY(3, 0, KEY_RIGHT),
      KEY(3, 2, KEY_LEFT),

};

static struct pxa27x_keypad_platform_data palmtx_keypad_platform_data = {
      .matrix_key_rows  = 4,
      .matrix_key_cols  = 3,
      .matrix_key_map         = palmtx_matrix_keys,
      .matrix_key_map_size    = ARRAY_SIZE(palmtx_matrix_keys),

      .debounce_interval      = 30,
};

/******************************************************************************
 * GPIO keys
 ******************************************************************************/
static struct gpio_keys_button palmtx_pxa_buttons[] = {
      {KEY_F8, GPIO_NR_PALMTX_HOTSYNC_BUTTON_N, 1, "HotSync Button" },
};

static struct gpio_keys_platform_data palmtx_pxa_keys_data = {
      .buttons    = palmtx_pxa_buttons,
      .nbuttons   = ARRAY_SIZE(palmtx_pxa_buttons),
};

static struct platform_device palmtx_pxa_keys = {
      .name = "gpio-keys",
      .id   = -1,
      .dev  = {
            .platform_data = &palmtx_pxa_keys_data,
      },
};

/******************************************************************************
 * Backlight
 ******************************************************************************/
static int palmtx_backlight_init(struct device *dev)
{
      int ret;

      ret = gpio_request(GPIO_NR_PALMTX_BL_POWER, "BL POWER");
      if (ret)
            goto err;
      ret = gpio_request(GPIO_NR_PALMTX_LCD_POWER, "LCD POWER");
      if (ret)
            goto err2;

      return 0;
err2:
      gpio_free(GPIO_NR_PALMTX_BL_POWER);
err:
      return ret;
}

static int palmtx_backlight_notify(int brightness)
{
      gpio_set_value(GPIO_NR_PALMTX_BL_POWER, brightness);
      gpio_set_value(GPIO_NR_PALMTX_LCD_POWER, brightness);
      return brightness;
}

static void palmtx_backlight_exit(struct device *dev)
{
      gpio_free(GPIO_NR_PALMTX_BL_POWER);
      gpio_free(GPIO_NR_PALMTX_LCD_POWER);
}

static struct platform_pwm_backlight_data palmtx_backlight_data = {
      .pwm_id           = 0,
      .max_brightness   = PALMTX_MAX_INTENSITY,
      .dft_brightness   = PALMTX_MAX_INTENSITY,
      .pwm_period_ns    = PALMTX_PERIOD_NS,
      .init       = palmtx_backlight_init,
      .notify           = palmtx_backlight_notify,
      .exit       = palmtx_backlight_exit,
};

static struct platform_device palmtx_backlight = {
      .name = "pwm-backlight",
      .dev  = {
            .parent           = &pxa27x_device_pwm0.dev,
            .platform_data    = &palmtx_backlight_data,
      },
};

/******************************************************************************
 * IrDA
 ******************************************************************************/
static void palmtx_irda_transceiver_mode(struct device *dev, int mode)
{
      gpio_set_value(GPIO_NR_PALMTX_IR_DISABLE, mode & IR_OFF);
      pxa2xx_transceiver_mode(dev, mode);
}

static struct pxaficp_platform_data palmtx_ficp_platform_data = {
      .transceiver_cap  = IR_SIRMODE | IR_FIRMODE | IR_OFF,
      .transceiver_mode = palmtx_irda_transceiver_mode,
};

/******************************************************************************
 * UDC
 ******************************************************************************/
static void palmtx_udc_command(int cmd)
{
      gpio_set_value(GPIO_NR_PALMTX_USB_POWER, !cmd);
      udelay(50);
      gpio_set_value(GPIO_NR_PALMTX_USB_PULLUP, !cmd);
}

static struct pxa2xx_udc_mach_info palmtx_udc_info __initdata = {
      .gpio_vbus        = GPIO_NR_PALMTX_USB_DETECT_N,
      .gpio_vbus_inverted     = 1,
      .udc_command            = palmtx_udc_command,
};

/******************************************************************************
 * Power supply
 ******************************************************************************/
static int power_supply_init(struct device *dev)
{
      int ret;

      ret = gpio_request(GPIO_NR_PALMTX_POWER_DETECT, "CABLE_STATE_AC");
      if (ret)
            goto err_cs_ac;

      ret = gpio_request(GPIO_NR_PALMTX_USB_DETECT_N, "CABLE_STATE_USB");
      if (ret)
            goto err_cs_usb;

      return 0;

err_cs_usb:
      gpio_free(GPIO_NR_PALMTX_POWER_DETECT);
err_cs_ac:
      return ret;
}

static int palmtx_is_ac_online(void)
{
      return gpio_get_value(GPIO_NR_PALMTX_POWER_DETECT);
}

static int palmtx_is_usb_online(void)
{
      return !gpio_get_value(GPIO_NR_PALMTX_USB_DETECT_N);
}

static void power_supply_exit(struct device *dev)
{
      gpio_free(GPIO_NR_PALMTX_USB_DETECT_N);
      gpio_free(GPIO_NR_PALMTX_POWER_DETECT);
}

static char *palmtx_supplicants[] = {
      "main-battery",
};

static struct pda_power_pdata power_supply_info = {
      .init            = power_supply_init,
      .is_ac_online    = palmtx_is_ac_online,
      .is_usb_online   = palmtx_is_usb_online,
      .exit            = power_supply_exit,
      .supplied_to     = palmtx_supplicants,
      .num_supplicants = ARRAY_SIZE(palmtx_supplicants),
};

static struct platform_device power_supply = {
      .name = "pda-power",
      .id   = -1,
      .dev  = {
            .platform_data = &power_supply_info,
      },
};

/******************************************************************************
 * Framebuffer
 ******************************************************************************/
static struct pxafb_mode_info palmtx_lcd_modes[] = {
{
      .pixclock   = 57692,
      .xres       = 320,
      .yres       = 480,
      .bpp        = 16,

      .left_margin      = 32,
      .right_margin     = 1,
      .upper_margin     = 7,
      .lower_margin     = 1,

      .hsync_len  = 4,
      .vsync_len  = 1,
},
};

static struct pxafb_mach_info palmtx_lcd_screen = {
      .modes            = palmtx_lcd_modes,
      .num_modes  = ARRAY_SIZE(palmtx_lcd_modes),
      .lcd_conn   = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
};

/******************************************************************************
 * Machine init
 ******************************************************************************/
static struct platform_device *devices[] __initdata = {
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
      &palmtx_pxa_keys,
#endif
      &palmtx_backlight,
      &power_supply,
};

static struct map_desc palmtx_io_desc[] __initdata = {
{
      .virtual    = PALMTX_PCMCIA_VIRT,
      .pfn        = __phys_to_pfn(PALMTX_PCMCIA_PHYS),
      .length           = PALMTX_PCMCIA_SIZE,
      .type       = MT_DEVICE
},
};

static void __init palmtx_map_io(void)
{
      pxa_map_io();
      iotable_init(palmtx_io_desc, ARRAY_SIZE(palmtx_io_desc));
}

static void __init palmtx_init(void)
{
      pxa2xx_mfp_config(ARRAY_AND_SIZE(palmtx_pin_config));

      set_pxa_fb_info(&palmtx_lcd_screen);
      pxa_set_mci_info(&palmtx_mci_platform_data);
      pxa_set_udc_info(&palmtx_udc_info);
      pxa_set_ac97_info(NULL);
      pxa_set_ficp_info(&palmtx_ficp_platform_data);
      pxa_set_keypad_info(&palmtx_keypad_platform_data);

      platform_add_devices(devices, ARRAY_SIZE(devices));
}

MACHINE_START(PALMTX, "Palm T|X")
      .phys_io    = PALMTX_PHYS_IO_START,
      .io_pg_offst      = io_p2v(0x40000000),
      .boot_params      = 0xa0000100,
      .map_io           = palmtx_map_io,
      .init_irq   = pxa27x_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = palmtx_init
MACHINE_END

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