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board-dm646x-evm.c

/*
 * TI DaVinci DM646X EVM board
 *
 * Derived from: arch/arm/mach-davinci/board-evm.c
 * Copyright (C) 2006 Texas Instruments.
 *
 * (C) 2007-2008, MontaVista Software, Inc.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 *
 */

/**************************************************************************
 * Included Files
 **************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/root_dev.h>
#include <linux/dma-mapping.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/i2c/pcf857x.h>
#include <linux/etherdevice.h>

#include <media/tvp514x.h>

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

#include <mach/dm646x.h>
#include <mach/common.h>
#include <mach/psc.h>
#include <mach/serial.h>
#include <mach/i2c.h>
#include <mach/mmc.h>
#include <mach/emac.h>

#if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
    defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
#define HAS_ATA 1
#else
#define HAS_ATA 0
#endif

/* CPLD Register 0 bits to control ATA */
#define DM646X_EVM_ATA_RST          BIT(0)
#define DM646X_EVM_ATA_PWD          BIT(1)

#define DM646X_EVM_PHY_MASK         (0x2)
#define DM646X_EVM_MDIO_FREQUENCY   (2200000) /* PHY bus frequency */

#define VIDCLKCTL_OFFSET      (DAVINCI_SYSTEM_MODULE_BASE + 0x38)
#define VSCLKDIS_OFFSET       (DAVINCI_SYSTEM_MODULE_BASE + 0x6c)
#define VCH2CLK_MASK          (BIT_MASK(10) | BIT_MASK(9) | BIT_MASK(8))
#define VCH2CLK_SYSCLK8       (BIT(9))
#define VCH2CLK_AUXCLK        (BIT(9) | BIT(8))
#define VCH3CLK_MASK          (BIT_MASK(14) | BIT_MASK(13) | BIT_MASK(12))
#define VCH3CLK_SYSCLK8       (BIT(13))
#define VCH3CLK_AUXCLK        (BIT(14) | BIT(13))

#define VIDCH2CLK       (BIT(10))
#define VIDCH3CLK       (BIT(11))
#define VIDCH1CLK       (BIT(4))
#define TVP7002_INPUT         (BIT(4))
#define TVP5147_INPUT         (~BIT(4))
#define VPIF_INPUT_ONE_CHANNEL      (BIT(5))
#define VPIF_INPUT_TWO_CHANNEL      (~BIT(5))
#define TVP5147_CH0           "tvp514x-0"
#define TVP5147_CH1           "tvp514x-1"

static void __iomem *vpif_vidclkctl_reg;
static void __iomem *vpif_vsclkdis_reg;
/* spin lock for updating above registers */
static spinlock_t vpif_reg_lock;

static struct davinci_uart_config uart_config __initdata = {
      .enabled_uarts = (1 << 0),
};

/* CPLD Register 0 Client: used for I/O Control */
static int cpld_reg0_probe(struct i2c_client *client,
                     const struct i2c_device_id *id)
{
      if (HAS_ATA) {
            u8 data;
            struct i2c_msg msg[2] = {
                  {
                        .addr = client->addr,
                        .flags = I2C_M_RD,
                        .len = 1,
                        .buf = &data,
                  },
                  {
                        .addr = client->addr,
                        .flags = 0,
                        .len = 1,
                        .buf = &data,
                  },
            };

            /* Clear ATA_RSTn and ATA_PWD bits to enable ATA operation. */
            i2c_transfer(client->adapter, msg, 1);
            data &= ~(DM646X_EVM_ATA_RST | DM646X_EVM_ATA_PWD);
            i2c_transfer(client->adapter, msg + 1, 1);
      }

      return 0;
}

static const struct i2c_device_id cpld_reg_ids[] = {
      { "cpld_reg0", 0, },
      { },
};

static struct i2c_driver dm6467evm_cpld_driver = {
      .driver.name      = "cpld_reg0",
      .id_table   = cpld_reg_ids,
      .probe            = cpld_reg0_probe,
};

/* LEDS */

static struct gpio_led evm_leds[] = {
      { .name = "DS1", .active_low = 1, },
      { .name = "DS2", .active_low = 1, },
      { .name = "DS3", .active_low = 1, },
      { .name = "DS4", .active_low = 1, },
};

static __initconst struct gpio_led_platform_data evm_led_data = {
      .num_leds = ARRAY_SIZE(evm_leds),
      .leds     = evm_leds,
};

static struct platform_device *evm_led_dev;

static int evm_led_setup(struct i2c_client *client, int gpio,
                  unsigned int ngpio, void *c)
{
      struct gpio_led *leds = evm_leds;
      int status;

      while (ngpio--) {
            leds->gpio = gpio++;
            leds++;
      };

      evm_led_dev = platform_device_alloc("leds-gpio", 0);
      platform_device_add_data(evm_led_dev, &evm_led_data,
                        sizeof(evm_led_data));

      evm_led_dev->dev.parent = &client->dev;
      status = platform_device_add(evm_led_dev);
      if (status < 0) {
            platform_device_put(evm_led_dev);
            evm_led_dev = NULL;
      }
      return status;
}

static int evm_led_teardown(struct i2c_client *client, int gpio,
                        unsigned ngpio, void *c)
{
      if (evm_led_dev) {
            platform_device_unregister(evm_led_dev);
            evm_led_dev = NULL;
      }
      return 0;
}

static int evm_sw_gpio[4] = { -EINVAL, -EINVAL, -EINVAL, -EINVAL };

static int evm_sw_setup(struct i2c_client *client, int gpio,
                  unsigned ngpio, void *c)
{
      int status;
      int i;
      char label[10];

      for (i = 0; i < 4; ++i) {
            snprintf(label, 10, "user_sw%d", i);
            status = gpio_request(gpio, label);
            if (status)
                  goto out_free;
            evm_sw_gpio[i] = gpio++;

            status = gpio_direction_input(evm_sw_gpio[i]);
            if (status) {
                  gpio_free(evm_sw_gpio[i]);
                  evm_sw_gpio[i] = -EINVAL;
                  goto out_free;
            }

            status = gpio_export(evm_sw_gpio[i], 0);
            if (status) {
                  gpio_free(evm_sw_gpio[i]);
                  evm_sw_gpio[i] = -EINVAL;
                  goto out_free;
            }
      }
      return status;
out_free:
      for (i = 0; i < 4; ++i) {
            if (evm_sw_gpio[i] != -EINVAL) {
                  gpio_free(evm_sw_gpio[i]);
                  evm_sw_gpio[i] = -EINVAL;
            }
      }
      return status;
}

static int evm_sw_teardown(struct i2c_client *client, int gpio,
                  unsigned ngpio, void *c)
{
      int i;

      for (i = 0; i < 4; ++i) {
            if (evm_sw_gpio[i] != -EINVAL) {
                  gpio_unexport(evm_sw_gpio[i]);
                  gpio_free(evm_sw_gpio[i]);
                  evm_sw_gpio[i] = -EINVAL;
            }
      }
      return 0;
}

static int evm_pcf_setup(struct i2c_client *client, int gpio,
                  unsigned int ngpio, void *c)
{
      int status;

      if (ngpio < 8)
            return -EINVAL;

      status = evm_sw_setup(client, gpio, 4, c);
      if (status)
            return status;

      return evm_led_setup(client, gpio+4, 4, c);
}

static int evm_pcf_teardown(struct i2c_client *client, int gpio,
                  unsigned int ngpio, void *c)
{
      BUG_ON(ngpio < 8);

      evm_sw_teardown(client, gpio, 4, c);
      evm_led_teardown(client, gpio+4, 4, c);

      return 0;
}

static struct pcf857x_platform_data pcf_data = {
      .gpio_base  = DAVINCI_N_GPIO+1,
      .setup            = evm_pcf_setup,
      .teardown   = evm_pcf_teardown,
};

/* Most of this EEPROM is unused, but U-Boot uses some data:
 *  - 0x7f00, 6 bytes Ethernet Address
 *  - ... newer boards may have more
 */

static struct at24_platform_data eeprom_info = {
      .byte_len       = (256*1024) / 8,
      .page_size      = 64,
      .flags          = AT24_FLAG_ADDR16,
      .setup          = davinci_get_mac_addr,
      .context    = (void *)0x7f00,
};

static u8 dm646x_iis_serializer_direction[] = {
       TX_MODE, RX_MODE, INACTIVE_MODE, INACTIVE_MODE,
};

static u8 dm646x_dit_serializer_direction[] = {
       TX_MODE,
};

static struct snd_platform_data dm646x_evm_snd_data[] = {
      {
            .tx_dma_offset  = 0x400,
            .rx_dma_offset  = 0x400,
            .op_mode        = DAVINCI_MCASP_IIS_MODE,
            .num_serializer = ARRAY_SIZE(dm646x_iis_serializer_direction),
            .tdm_slots      = 2,
            .serial_dir     = dm646x_iis_serializer_direction,
            .eventq_no      = EVENTQ_0,
      },
      {
            .tx_dma_offset  = 0x400,
            .rx_dma_offset  = 0,
            .op_mode        = DAVINCI_MCASP_DIT_MODE,
            .num_serializer = ARRAY_SIZE(dm646x_dit_serializer_direction),
            .tdm_slots      = 32,
            .serial_dir     = dm646x_dit_serializer_direction,
            .eventq_no      = EVENTQ_0,
      },
};

static struct i2c_client *cpld_client;

static int cpld_video_probe(struct i2c_client *client,
                  const struct i2c_device_id *id)
{
      cpld_client = client;
      return 0;
}

static int __devexit cpld_video_remove(struct i2c_client *client)
{
      cpld_client = NULL;
      return 0;
}

static const struct i2c_device_id cpld_video_id[] = {
      { "cpld_video", 0 },
      { }
};

static struct i2c_driver cpld_video_driver = {
      .driver = {
            .name = "cpld_video",
      },
      .probe            = cpld_video_probe,
      .remove           = cpld_video_remove,
      .id_table   = cpld_video_id,
};

static void evm_init_cpld(void)
{
      i2c_add_driver(&cpld_video_driver);
}

static struct i2c_board_info __initdata i2c_info[] =  {
      {
            I2C_BOARD_INFO("24c256", 0x50),
            .platform_data  = &eeprom_info,
      },
      {
            I2C_BOARD_INFO("pcf8574a", 0x38),
            .platform_data    = &pcf_data,
      },
      {
            I2C_BOARD_INFO("cpld_reg0", 0x3a),
      },
      {
            I2C_BOARD_INFO("tlv320aic33", 0x18),
      },
      {
            I2C_BOARD_INFO("cpld_video", 0x3b),
      },
};

static struct davinci_i2c_platform_data i2c_pdata = {
      .bus_freq       = 100 /* kHz */,
      .bus_delay      = 0 /* usec */,
};

static int set_vpif_clock(int mux_mode, int hd)
{
      unsigned long flags;
      unsigned int value;
      int val = 0;
      int err = 0;

      if (!vpif_vidclkctl_reg || !vpif_vsclkdis_reg || !cpld_client)
            return -ENXIO;

      /* disable the clock */
      spin_lock_irqsave(&vpif_reg_lock, flags);
      value = __raw_readl(vpif_vsclkdis_reg);
      value |= (VIDCH3CLK | VIDCH2CLK);
      __raw_writel(value, vpif_vsclkdis_reg);
      spin_unlock_irqrestore(&vpif_reg_lock, flags);

      val = i2c_smbus_read_byte(cpld_client);
      if (val < 0)
            return val;

      if (mux_mode == 1)
            val &= ~0x40;
      else
            val |= 0x40;

      err = i2c_smbus_write_byte(cpld_client, val);
      if (err)
            return err;

      value = __raw_readl(vpif_vidclkctl_reg);
      value &= ~(VCH2CLK_MASK);
      value &= ~(VCH3CLK_MASK);

      if (hd >= 1)
            value |= (VCH2CLK_SYSCLK8 | VCH3CLK_SYSCLK8);
      else
            value |= (VCH2CLK_AUXCLK | VCH3CLK_AUXCLK);

      __raw_writel(value, vpif_vidclkctl_reg);

      spin_lock_irqsave(&vpif_reg_lock, flags);
      value = __raw_readl(vpif_vsclkdis_reg);
      /* enable the clock */
      value &= ~(VIDCH3CLK | VIDCH2CLK);
      __raw_writel(value, vpif_vsclkdis_reg);
      spin_unlock_irqrestore(&vpif_reg_lock, flags);

      return 0;
}

static struct vpif_subdev_info dm646x_vpif_subdev[] = {
      {
            .name = "adv7343",
            .board_info = {
                  I2C_BOARD_INFO("adv7343", 0x2a),
            },
      },
      {
            .name = "ths7303",
            .board_info = {
                  I2C_BOARD_INFO("ths7303", 0x2c),
            },
      },
};

static const char *output[] = {
      "Composite",
      "Component",
      "S-Video",
};

static struct vpif_display_config dm646x_vpif_display_config = {
      .set_clock  = set_vpif_clock,
      .subdevinfo = dm646x_vpif_subdev,
      .subdev_count     = ARRAY_SIZE(dm646x_vpif_subdev),
      .output           = output,
      .output_count     = ARRAY_SIZE(output),
      .card_name  = "DM646x EVM",
};

/**
 * setup_vpif_input_path()
 * @channel: channel id (0 - CH0, 1 - CH1)
 * @sub_dev_name: ptr sub device name
 *
 * This will set vpif input to capture data from tvp514x or
 * tvp7002.
 */
static int setup_vpif_input_path(int channel, const char *sub_dev_name)
{
      int err = 0;
      int val;

      /* for channel 1, we don't do anything */
      if (channel != 0)
            return 0;

      if (!cpld_client)
            return -ENXIO;

      val = i2c_smbus_read_byte(cpld_client);
      if (val < 0)
            return val;

      if (!strcmp(sub_dev_name, TVP5147_CH0) ||
          !strcmp(sub_dev_name, TVP5147_CH1))
            val &= TVP5147_INPUT;
      else
            val |= TVP7002_INPUT;

      err = i2c_smbus_write_byte(cpld_client, val);
      if (err)
            return err;
      return 0;
}

/**
 * setup_vpif_input_channel_mode()
 * @mux_mode:  mux mode. 0 - 1 channel or (1) - 2 channel
 *
 * This will setup input mode to one channel (TVP7002) or 2 channel (TVP5147)
 */
static int setup_vpif_input_channel_mode(int mux_mode)
{
      unsigned long flags;
      int err = 0;
      int val;
      u32 value;

      if (!vpif_vsclkdis_reg || !cpld_client)
            return -ENXIO;

      val = i2c_smbus_read_byte(cpld_client);
      if (val < 0)
            return val;

      spin_lock_irqsave(&vpif_reg_lock, flags);
      value = __raw_readl(vpif_vsclkdis_reg);
      if (mux_mode) {
            val &= VPIF_INPUT_TWO_CHANNEL;
            value |= VIDCH1CLK;
      } else {
            val |= VPIF_INPUT_ONE_CHANNEL;
            value &= ~VIDCH1CLK;
      }
      __raw_writel(value, vpif_vsclkdis_reg);
      spin_unlock_irqrestore(&vpif_reg_lock, flags);

      err = i2c_smbus_write_byte(cpld_client, val);
      if (err)
            return err;

      return 0;
}

static struct tvp514x_platform_data tvp5146_pdata = {
      .clk_polarity = 0,
      .hs_polarity = 1,
      .vs_polarity = 1
};

#define TVP514X_STD_ALL (V4L2_STD_NTSC | V4L2_STD_PAL)

static struct vpif_subdev_info vpif_capture_sdev_info[] = {
      {
            .name = TVP5147_CH0,
            .board_info = {
                  I2C_BOARD_INFO("tvp5146", 0x5d),
                  .platform_data = &tvp5146_pdata,
            },
            .input = INPUT_CVBS_VI2B,
            .output = OUTPUT_10BIT_422_EMBEDDED_SYNC,
            .can_route = 1,
            .vpif_if = {
                  .if_type = VPIF_IF_BT656,
                  .hd_pol = 1,
                  .vd_pol = 1,
                  .fid_pol = 0,
            },
      },
      {
            .name = TVP5147_CH1,
            .board_info = {
                  I2C_BOARD_INFO("tvp5146", 0x5c),
                  .platform_data = &tvp5146_pdata,
            },
            .input = INPUT_SVIDEO_VI2C_VI1C,
            .output = OUTPUT_10BIT_422_EMBEDDED_SYNC,
            .can_route = 1,
            .vpif_if = {
                  .if_type = VPIF_IF_BT656,
                  .hd_pol = 1,
                  .vd_pol = 1,
                  .fid_pol = 0,
            },
      },
};

static const struct vpif_input dm6467_ch0_inputs[] = {
      {
            .input = {
                  .index = 0,
                  .name = "Composite",
                  .type = V4L2_INPUT_TYPE_CAMERA,
                  .std = TVP514X_STD_ALL,
            },
            .subdev_name = TVP5147_CH0,
      },
};

static const struct vpif_input dm6467_ch1_inputs[] = {
       {
            .input = {
                  .index = 0,
                  .name = "S-Video",
                  .type = V4L2_INPUT_TYPE_CAMERA,
                  .std = TVP514X_STD_ALL,
            },
            .subdev_name = TVP5147_CH1,
      },
};

static struct vpif_capture_config dm646x_vpif_capture_cfg = {
      .setup_input_path = setup_vpif_input_path,
      .setup_input_channel_mode = setup_vpif_input_channel_mode,
      .subdev_info = vpif_capture_sdev_info,
      .subdev_count = ARRAY_SIZE(vpif_capture_sdev_info),
      .chan_config[0] = {
            .inputs = dm6467_ch0_inputs,
            .input_count = ARRAY_SIZE(dm6467_ch0_inputs),
      },
      .chan_config[1] = {
            .inputs = dm6467_ch1_inputs,
            .input_count = ARRAY_SIZE(dm6467_ch1_inputs),
      },
};

static void __init evm_init_video(void)
{
      vpif_vidclkctl_reg = ioremap(VIDCLKCTL_OFFSET, 4);
      vpif_vsclkdis_reg = ioremap(VSCLKDIS_OFFSET, 4);
      if (!vpif_vidclkctl_reg || !vpif_vsclkdis_reg) {
            pr_err("Can't map VPIF VIDCLKCTL or VSCLKDIS registers\n");
            return;
      }
      spin_lock_init(&vpif_reg_lock);

      dm646x_setup_vpif(&dm646x_vpif_display_config,
                    &dm646x_vpif_capture_cfg);
}

static void __init evm_init_i2c(void)
{
      davinci_init_i2c(&i2c_pdata);
      i2c_add_driver(&dm6467evm_cpld_driver);
      i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
      evm_init_cpld();
      evm_init_video();
}

static void __init davinci_map_io(void)
{
      dm646x_init();
}

static __init void evm_init(void)
{
      struct davinci_soc_info *soc_info = &davinci_soc_info;

      evm_init_i2c();
      davinci_serial_init(&uart_config);
      dm646x_init_mcasp0(&dm646x_evm_snd_data[0]);
      dm646x_init_mcasp1(&dm646x_evm_snd_data[1]);

      if (HAS_ATA)
            dm646x_init_ide();

      soc_info->emac_pdata->phy_mask = DM646X_EVM_PHY_MASK;
      soc_info->emac_pdata->mdio_max_freq = DM646X_EVM_MDIO_FREQUENCY;
}

static __init void davinci_dm646x_evm_irq_init(void)
{
      davinci_irq_init();
}

MACHINE_START(DAVINCI_DM6467_EVM, "DaVinci DM646x EVM")
      .phys_io      = IO_PHYS,
      .io_pg_offst  = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
      .boot_params  = (0x80000100),
      .map_io       = davinci_map_io,
      .init_irq     = davinci_dm646x_evm_irq_init,
      .timer        = &davinci_timer,
      .init_machine = evm_init,
MACHINE_END


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