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board-mityomapl138.c

/*
 * Critical Link MityOMAP-L138 SoM
 *
 * Copyright (C) 2010 Critical Link LLC - http://www.criticallink.com
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/etherdevice.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/common.h>
#include <mach/cp_intc.h>
#include <mach/da8xx.h>
#include <mach/nand.h>
#include <mach/mux.h>

#define MITYOMAPL138_PHY_ID         "0:03"

#define FACTORY_CONFIG_MAGIC  0x012C0138
#define FACTORY_CONFIG_VERSION      0x00010001

/* Data Held in On-Board I2C device */
00035 struct factory_config {
      u32   magic;
      u32   version;
      u8    mac[6];
      u32   fpga_type;
      u32   spare;
      u32   serialnumber;
      char  partnum[32];
};

static struct factory_config factory_config;

static void read_factory_config(struct memory_accessor *a, void *context)
{
      int ret;
      struct davinci_soc_info *soc_info = &davinci_soc_info;

      ret = a->read(a, (char *)&factory_config, 0, sizeof(factory_config));
      if (ret != sizeof(struct factory_config)) {
            pr_warning("MityOMAPL138: Read Factory Config Failed: %d\n",
                        ret);
            return;
      }

      if (factory_config.magic != FACTORY_CONFIG_MAGIC) {
            pr_warning("MityOMAPL138: Factory Config Magic Wrong (%X)\n",
                        factory_config.magic);
            return;
      }

      if (factory_config.version != FACTORY_CONFIG_VERSION) {
            pr_warning("MityOMAPL138: Factory Config Version Wrong (%X)\n",
                        factory_config.version);
            return;
      }

      pr_info("MityOMAPL138: Found MAC = %pM\n", factory_config.mac);
      pr_info("MityOMAPL138: Part Number = %s\n", factory_config.partnum);
      if (is_valid_ether_addr(factory_config.mac))
            memcpy(soc_info->emac_pdata->mac_addr,
                  factory_config.mac, ETH_ALEN);
      else
            pr_warning("MityOMAPL138: Invalid MAC found "
                        "in factory config block\n");
}

static struct at24_platform_data mityomapl138_fd_chip = {
      .byte_len   = 256,
      .page_size  = 8,
      .flags            = AT24_FLAG_READONLY | AT24_FLAG_IRUGO,
      .setup            = read_factory_config,
      .context    = NULL,
};

static struct davinci_i2c_platform_data mityomap_i2c_0_pdata = {
      .bus_freq   = 100,      /* kHz */
      .bus_delay  = 0,  /* usec */
};

/* TPS65023 voltage regulator support */
/* 1.2V Core */
static struct regulator_consumer_supply tps65023_dcdc1_consumers[] = {
      {
            .supply = "cvdd",
      },
};

/* 1.8V */
static struct regulator_consumer_supply tps65023_dcdc2_consumers[] = {
      {
            .supply = "usb0_vdda18",
      },
      {
            .supply = "usb1_vdda18",
      },
      {
            .supply = "ddr_dvdd18",
      },
      {
            .supply = "sata_vddr",
      },
};

/* 1.2V */
static struct regulator_consumer_supply tps65023_dcdc3_consumers[] = {
      {
            .supply = "sata_vdd",
      },
      {
            .supply = "usb_cvdd",
      },
      {
            .supply = "pll0_vdda",
      },
      {
            .supply = "pll1_vdda",
      },
};

/* 1.8V Aux LDO, not used */
static struct regulator_consumer_supply tps65023_ldo1_consumers[] = {
      {
            .supply = "1.8v_aux",
      },
};

/* FPGA VCC Aux (2.5 or 3.3) LDO */
static struct regulator_consumer_supply tps65023_ldo2_consumers[] = {
      {
            .supply = "vccaux",
      },
};

static struct regulator_init_data tps65023_regulator_data[] = {
      /* dcdc1 */
      {
            .constraints = {
                  .min_uV = 1150000,
                  .max_uV = 1350000,
                  .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                                REGULATOR_CHANGE_STATUS,
                  .boot_on = 1,
            },
            .num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc1_consumers),
            .consumer_supplies = tps65023_dcdc1_consumers,
      },
      /* dcdc2 */
      {
            .constraints = {
                  .min_uV = 1800000,
                  .max_uV = 1800000,
                  .valid_ops_mask = REGULATOR_CHANGE_STATUS,
                  .boot_on = 1,
            },
            .num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc2_consumers),
            .consumer_supplies = tps65023_dcdc2_consumers,
      },
      /* dcdc3 */
      {
            .constraints = {
                  .min_uV = 1200000,
                  .max_uV = 1200000,
                  .valid_ops_mask = REGULATOR_CHANGE_STATUS,
                  .boot_on = 1,
            },
            .num_consumer_supplies = ARRAY_SIZE(tps65023_dcdc3_consumers),
            .consumer_supplies = tps65023_dcdc3_consumers,
      },
      /* ldo1 */
      {
            .constraints = {
                  .min_uV = 1800000,
                  .max_uV = 1800000,
                  .valid_ops_mask = REGULATOR_CHANGE_STATUS,
                  .boot_on = 1,
            },
            .num_consumer_supplies = ARRAY_SIZE(tps65023_ldo1_consumers),
            .consumer_supplies = tps65023_ldo1_consumers,
      },
      /* ldo2 */
      {
            .constraints = {
                  .min_uV = 2500000,
                  .max_uV = 3300000,
                  .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                                REGULATOR_CHANGE_STATUS,
                  .boot_on = 1,
            },
            .num_consumer_supplies = ARRAY_SIZE(tps65023_ldo2_consumers),
            .consumer_supplies = tps65023_ldo2_consumers,
      },
};

static struct i2c_board_info __initdata mityomap_tps65023_info[] = {
      {
            I2C_BOARD_INFO("tps65023", 0x48),
            .platform_data = &tps65023_regulator_data[0],
      },
      {
            I2C_BOARD_INFO("24c02", 0x50),
            .platform_data = &mityomapl138_fd_chip,
      },
};

static int __init pmic_tps65023_init(void)
{
      return i2c_register_board_info(1, mityomap_tps65023_info,
                              ARRAY_SIZE(mityomap_tps65023_info));
}

/*
 * MityDSP-L138 includes a 256 MByte large-page NAND flash
 * (128K blocks).
 */
static struct mtd_partition mityomapl138_nandflash_partition[] = {
      {
            .name       = "rootfs",
            .offset           = 0,
            .size       = SZ_128M,
            .mask_flags = 0, /* MTD_WRITEABLE, */
      },
      {
            .name       = "homefs",
            .offset           = MTDPART_OFS_APPEND,
            .size       = MTDPART_SIZ_FULL,
            .mask_flags = 0,
      },
};

static struct davinci_nand_pdata mityomapl138_nandflash_data = {
      .parts            = mityomapl138_nandflash_partition,
      .nr_parts   = ARRAY_SIZE(mityomapl138_nandflash_partition),
      .ecc_mode   = NAND_ECC_HW,
      .options    = NAND_USE_FLASH_BBT | NAND_BUSWIDTH_16,
      .ecc_bits   = 1, /* 4 bit mode is not supported with 16 bit NAND */
};

static struct resource mityomapl138_nandflash_resource[] = {
      {
            .start      = DA8XX_AEMIF_CS3_BASE,
            .end  = DA8XX_AEMIF_CS3_BASE + SZ_512K + 2 * SZ_1K - 1,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = DA8XX_AEMIF_CTL_BASE,
            .end  = DA8XX_AEMIF_CTL_BASE + SZ_32K - 1,
            .flags      = IORESOURCE_MEM,
      },
};

static struct platform_device mityomapl138_nandflash_device = {
      .name       = "davinci_nand",
      .id         = 0,
      .dev        = {
            .platform_data    = &mityomapl138_nandflash_data,
      },
      .num_resources    = ARRAY_SIZE(mityomapl138_nandflash_resource),
      .resource   = mityomapl138_nandflash_resource,
};

static struct platform_device *mityomapl138_devices[] __initdata = {
      &mityomapl138_nandflash_device,
};

static void __init mityomapl138_setup_nand(void)
{
      platform_add_devices(mityomapl138_devices,
                         ARRAY_SIZE(mityomapl138_devices));
}

static struct davinci_uart_config mityomapl138_uart_config __initdata = {
      .enabled_uarts = 0x7,
};

static const short mityomap_mii_pins[] = {
      DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
      DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
      DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
      DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
      DA850_MDIO_D,
      -1
};

static const short mityomap_rmii_pins[] = {
      DA850_RMII_TXD_0, DA850_RMII_TXD_1, DA850_RMII_TXEN,
      DA850_RMII_CRS_DV, DA850_RMII_RXD_0, DA850_RMII_RXD_1,
      DA850_RMII_RXER, DA850_RMII_MHZ_50_CLK, DA850_MDIO_CLK,
      DA850_MDIO_D,
      -1
};

static void __init mityomapl138_config_emac(void)
{
      void __iomem *cfg_chip3_base;
      int ret;
      u32 val;
      struct davinci_soc_info *soc_info = &davinci_soc_info;

      soc_info->emac_pdata->rmii_en = 0; /* hardcoded for now */

      cfg_chip3_base = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
      val = __raw_readl(cfg_chip3_base);

      if (soc_info->emac_pdata->rmii_en) {
            val |= BIT(8);
            ret = davinci_cfg_reg_list(mityomap_rmii_pins);
            pr_info("RMII PHY configured\n");
      } else {
            val &= ~BIT(8);
            ret = davinci_cfg_reg_list(mityomap_mii_pins);
            pr_info("MII PHY configured\n");
      }

      if (ret) {
            pr_warning("mii/rmii mux setup failed: %d\n", ret);
            return;
      }

      /* configure the CFGCHIP3 register for RMII or MII */
      __raw_writel(val, cfg_chip3_base);

      soc_info->emac_pdata->phy_id = MITYOMAPL138_PHY_ID;

      ret = da8xx_register_emac();
      if (ret)
            pr_warning("emac registration failed: %d\n", ret);
}

static struct davinci_pm_config da850_pm_pdata = {
      .sleepcount = 128,
};

static struct platform_device da850_pm_device = {
      .name = "pm-davinci",
      .dev = {
            .platform_data  = &da850_pm_pdata,
      },
      .id   = -1,
};

static void __init mityomapl138_init(void)
{
      int ret;

      /* for now, no special EDMA channels are reserved */
      ret = da850_register_edma(NULL);
      if (ret)
            pr_warning("edma registration failed: %d\n", ret);

      ret = da8xx_register_watchdog();
      if (ret)
            pr_warning("watchdog registration failed: %d\n", ret);

      davinci_serial_init(&mityomapl138_uart_config);

      ret = da8xx_register_i2c(0, &mityomap_i2c_0_pdata);
      if (ret)
            pr_warning("i2c0 registration failed: %d\n", ret);

      ret = pmic_tps65023_init();
      if (ret)
            pr_warning("TPS65023 PMIC init failed: %d\n", ret);

      mityomapl138_setup_nand();

      mityomapl138_config_emac();

      ret = da8xx_register_rtc();
      if (ret)
            pr_warning("rtc setup failed: %d\n", ret);

      ret = da850_register_cpufreq("pll0_sysclk3");
      if (ret)
            pr_warning("cpufreq registration failed: %d\n", ret);

      ret = da8xx_register_cpuidle();
      if (ret)
            pr_warning("cpuidle registration failed: %d\n", ret);

      ret = da850_register_pm(&da850_pm_device);
      if (ret)
            pr_warning("da850_evm_init: suspend registration failed: %d\n",
                        ret);
}

#ifdef CONFIG_SERIAL_8250_CONSOLE
static int __init mityomapl138_console_init(void)
{
      if (!machine_is_mityomapl138())
            return 0;

      return add_preferred_console("ttyS", 1, "115200");
}
console_initcall(mityomapl138_console_init);
#endif

static void __init mityomapl138_map_io(void)
{
      da850_init();
}

MACHINE_START(MITYOMAPL138, "MityDSP-L138/MityARM-1808")
      .boot_params      = (DA8XX_DDR_BASE + 0x100),
      .map_io           = mityomapl138_map_io,
      .init_irq   = cp_intc_init,
      .timer            = &davinci_timer,
      .init_machine     = mityomapl138_init,
MACHINE_END

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