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board-da830-evm.c

/*
 * TI DA830/OMAP L137 EVM board
 *
 * Author: Mark A. Greer <mgreer@mvista.com>
 * Derived from: arch/arm/mach-davinci/board-dm644x-evm.c
 *
 * 2007, 2009 (c) 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.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c/pcf857x.h>
#include <linux/i2c/at24.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>

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

#include <mach/cp_intc.h>
#include <mach/mux.h>
#include <mach/nand.h>
#include <mach/da8xx.h>
#include <mach/usb.h>
#include <mach/aemif.h>

#define DA830_EVM_PHY_ID            ""
/*
 * USB1 VBUS is controlled by GPIO1[15], over-current is reported on GPIO2[4].
 */
#define ON_BD_USB_DRV   GPIO_TO_PIN(1, 15)
#define ON_BD_USB_OVC   GPIO_TO_PIN(2, 4)

static const short da830_evm_usb11_pins[] = {
      DA830_GPIO1_15, DA830_GPIO2_4,
      -1
};

static da8xx_ocic_handler_t da830_evm_usb_ocic_handler;

static int da830_evm_usb_set_power(unsigned port, int on)
{
      gpio_set_value(ON_BD_USB_DRV, on);
      return 0;
}

static int da830_evm_usb_get_power(unsigned port)
{
      return gpio_get_value(ON_BD_USB_DRV);
}

static int da830_evm_usb_get_oci(unsigned port)
{
      return !gpio_get_value(ON_BD_USB_OVC);
}

static irqreturn_t da830_evm_usb_ocic_irq(int, void *);

static int da830_evm_usb_ocic_notify(da8xx_ocic_handler_t handler)
{
      int irq     = gpio_to_irq(ON_BD_USB_OVC);
      int error   = 0;

      if (handler != NULL) {
            da830_evm_usb_ocic_handler = handler;

            error = request_irq(irq, da830_evm_usb_ocic_irq, IRQF_DISABLED |
                            IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
                            "OHCI over-current indicator", NULL);
            if (error)
                  printk(KERN_ERR "%s: could not request IRQ to watch "
                         "over-current indicator changes\n", __func__);
      } else
            free_irq(irq, NULL);

      return error;
}

static struct da8xx_ohci_root_hub da830_evm_usb11_pdata = {
      .set_power  = da830_evm_usb_set_power,
      .get_power  = da830_evm_usb_get_power,
      .get_oci    = da830_evm_usb_get_oci,
      .ocic_notify      = da830_evm_usb_ocic_notify,

      /* TPS2065 switch @ 5V */
      .potpgt           = (3 + 1) / 2,    /* 3 ms max */
};

static irqreturn_t da830_evm_usb_ocic_irq(int irq, void *dev_id)
{
      da830_evm_usb_ocic_handler(&da830_evm_usb11_pdata, 1);
      return IRQ_HANDLED;
}

static __init void da830_evm_usb_init(void)
{
      u32 cfgchip2;
      int ret;

      /*
       * Set up USB clock/mode in the CFGCHIP2 register.
       * FYI:  CFGCHIP2 is 0x0000ef00 initially.
       */
      cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));

      /* USB2.0 PHY reference clock is 24 MHz */
      cfgchip2 &= ~CFGCHIP2_REFFREQ;
      cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;

      /*
       * Select internal reference clock for USB 2.0 PHY
       * and use it as a clock source for USB 1.1 PHY
       * (this is the default setting anyway).
       */
      cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX;
      cfgchip2 |=  CFGCHIP2_USB2PHYCLKMUX;

      /*
       * We have to override VBUS/ID signals when MUSB is configured into the
       * host-only mode -- ID pin will float if no cable is connected, so the
       * controller won't be able to drive VBUS thinking that it's a B-device.
       * Otherwise, we want to use the OTG mode and enable VBUS comparators.
       */
      cfgchip2 &= ~CFGCHIP2_OTGMODE;
#ifdef      CONFIG_USB_MUSB_HOST
      cfgchip2 |=  CFGCHIP2_FORCE_HOST;
#else
      cfgchip2 |=  CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN;
#endif

      __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));

      /* USB_REFCLKIN is not used. */
      ret = davinci_cfg_reg(DA830_USB0_DRVVBUS);
      if (ret)
            pr_warning("%s: USB 2.0 PinMux setup failed: %d\n",
                     __func__, ret);
      else {
            /*
             * TPS2065 switch @ 5V supplies 1 A (sustains 1.5 A),
             * with the power on to power good time of 3 ms.
             */
            ret = da8xx_register_usb20(1000, 3);
            if (ret)
                  pr_warning("%s: USB 2.0 registration failed: %d\n",
                           __func__, ret);
      }

      ret = davinci_cfg_reg_list(da830_evm_usb11_pins);
      if (ret) {
            pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
                     __func__, ret);
            return;
      }

      ret = gpio_request(ON_BD_USB_DRV, "ON_BD_USB_DRV");
      if (ret) {
            printk(KERN_ERR "%s: failed to request GPIO for USB 1.1 port "
                   "power control: %d\n", __func__, ret);
            return;
      }
      gpio_direction_output(ON_BD_USB_DRV, 0);

      ret = gpio_request(ON_BD_USB_OVC, "ON_BD_USB_OVC");
      if (ret) {
            printk(KERN_ERR "%s: failed to request GPIO for USB 1.1 port "
                   "over-current indicator: %d\n", __func__, ret);
            return;
      }
      gpio_direction_input(ON_BD_USB_OVC);

      ret = da8xx_register_usb11(&da830_evm_usb11_pdata);
      if (ret)
            pr_warning("%s: USB 1.1 registration failed: %d\n",
                     __func__, ret);
}

static struct davinci_uart_config da830_evm_uart_config __initdata = {
      .enabled_uarts = 0x7,
};

static const short da830_evm_mcasp1_pins[] = {
      DA830_AHCLKX1, DA830_ACLKX1, DA830_AFSX1, DA830_AHCLKR1, DA830_AFSR1,
      DA830_AMUTE1, DA830_AXR1_0, DA830_AXR1_1, DA830_AXR1_2, DA830_AXR1_5,
      DA830_ACLKR1, DA830_AXR1_6, DA830_AXR1_7, DA830_AXR1_8, DA830_AXR1_10,
      DA830_AXR1_11,
      -1
};

static u8 da830_iis_serializer_direction[] = {
      RX_MODE,    INACTIVE_MODE,    INACTIVE_MODE,    INACTIVE_MODE,
      INACTIVE_MODE,    TX_MODE,    INACTIVE_MODE,    INACTIVE_MODE,
      INACTIVE_MODE,    INACTIVE_MODE,    INACTIVE_MODE,    INACTIVE_MODE,
};

static struct snd_platform_data da830_evm_snd_data = {
      .tx_dma_offset  = 0x2000,
      .rx_dma_offset  = 0x2000,
      .op_mode        = DAVINCI_MCASP_IIS_MODE,
      .num_serializer = ARRAY_SIZE(da830_iis_serializer_direction),
      .tdm_slots      = 2,
      .serial_dir     = da830_iis_serializer_direction,
      .asp_chan_q     = EVENTQ_0,
      .version    = MCASP_VERSION_2,
      .txnumevt   = 1,
      .rxnumevt   = 1,
};

/*
 * GPIO2[1] is used as MMC_SD_WP and GPIO2[2] as MMC_SD_INS.
 */
static const short da830_evm_mmc_sd_pins[] = {
      DA830_MMCSD_DAT_0, DA830_MMCSD_DAT_1, DA830_MMCSD_DAT_2,
      DA830_MMCSD_DAT_3, DA830_MMCSD_DAT_4, DA830_MMCSD_DAT_5,
      DA830_MMCSD_DAT_6, DA830_MMCSD_DAT_7, DA830_MMCSD_CLK,
      DA830_MMCSD_CMD,   DA830_GPIO2_1,     DA830_GPIO2_2,
      -1
};

#define DA830_MMCSD_WP_PIN          GPIO_TO_PIN(2, 1)
#define DA830_MMCSD_CD_PIN          GPIO_TO_PIN(2, 2)

static int da830_evm_mmc_get_ro(int index)
{
      return gpio_get_value(DA830_MMCSD_WP_PIN);
}

static int da830_evm_mmc_get_cd(int index)
{
      return !gpio_get_value(DA830_MMCSD_CD_PIN);
}

static struct davinci_mmc_config da830_evm_mmc_config = {
      .get_ro                 = da830_evm_mmc_get_ro,
      .get_cd                 = da830_evm_mmc_get_cd,
      .wires                  = 8,
      .max_freq         = 50000000,
      .caps             = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
      .version          = MMC_CTLR_VERSION_2,
};

static inline void da830_evm_init_mmc(void)
{
      int ret;

      ret = davinci_cfg_reg_list(da830_evm_mmc_sd_pins);
      if (ret) {
            pr_warning("da830_evm_init: mmc/sd mux setup failed: %d\n",
                        ret);
            return;
      }

      ret = gpio_request(DA830_MMCSD_WP_PIN, "MMC WP");
      if (ret) {
            pr_warning("da830_evm_init: can not open GPIO %d\n",
                     DA830_MMCSD_WP_PIN);
            return;
      }
      gpio_direction_input(DA830_MMCSD_WP_PIN);

      ret = gpio_request(DA830_MMCSD_CD_PIN, "MMC CD\n");
      if (ret) {
            pr_warning("da830_evm_init: can not open GPIO %d\n",
                     DA830_MMCSD_CD_PIN);
            return;
      }
      gpio_direction_input(DA830_MMCSD_CD_PIN);

      ret = da8xx_register_mmcsd0(&da830_evm_mmc_config);
      if (ret) {
            pr_warning("da830_evm_init: mmc/sd registration failed: %d\n",
                        ret);
            gpio_free(DA830_MMCSD_WP_PIN);
      }
}

/*
 * UI board NAND/NOR flashes only use 8-bit data bus.
 */
static const short da830_evm_emif25_pins[] = {
      DA830_EMA_D_0, DA830_EMA_D_1, DA830_EMA_D_2, DA830_EMA_D_3,
      DA830_EMA_D_4, DA830_EMA_D_5, DA830_EMA_D_6, DA830_EMA_D_7,
      DA830_EMA_A_0, DA830_EMA_A_1, DA830_EMA_A_2, DA830_EMA_A_3,
      DA830_EMA_A_4, DA830_EMA_A_5, DA830_EMA_A_6, DA830_EMA_A_7,
      DA830_EMA_A_8, DA830_EMA_A_9, DA830_EMA_A_10, DA830_EMA_A_11,
      DA830_EMA_A_12, DA830_EMA_BA_0, DA830_EMA_BA_1, DA830_NEMA_WE,
      DA830_NEMA_CS_2, DA830_NEMA_CS_3, DA830_NEMA_OE, DA830_EMA_WAIT_0,
      -1
};

#if defined(CONFIG_MMC_DAVINCI) || defined(CONFIG_MMC_DAVINCI_MODULE)
#define HAS_MMC   1
#else
#define HAS_MMC   0
#endif

#ifdef CONFIG_DA830_UI_NAND
static struct mtd_partition da830_evm_nand_partitions[] = {
      /* bootloader (U-Boot, etc) in first sector */
      [0] = {
            .name       = "bootloader",
            .offset           = 0,
            .size       = SZ_128K,
            .mask_flags = MTD_WRITEABLE,  /* force read-only */
      },
      /* bootloader params in the next sector */
      [1] = {
            .name       = "params",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_128K,
            .mask_flags = MTD_WRITEABLE,  /* force read-only */
      },
      /* kernel */
      [2] = {
            .name       = "kernel",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_2M,
            .mask_flags = 0,
      },
      /* file system */
      [3] = {
            .name       = "filesystem",
            .offset           = MTDPART_OFS_APPEND,
            .size       = MTDPART_SIZ_FULL,
            .mask_flags = 0,
      }
};

/* flash bbt decriptors */
static uint8_t da830_evm_nand_bbt_pattern[] = { 'B', 'b', 't', '0' };
static uint8_t da830_evm_nand_mirror_pattern[] = { '1', 't', 'b', 'B' };

static struct nand_bbt_descr da830_evm_nand_bbt_main_descr = {
      .options    = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE |
                    NAND_BBT_WRITE | NAND_BBT_2BIT |
                    NAND_BBT_VERSION | NAND_BBT_PERCHIP,
      .offs       = 2,
      .len        = 4,
      .veroffs    = 16,
      .maxblocks  = 4,
      .pattern    = da830_evm_nand_bbt_pattern
};

static struct nand_bbt_descr da830_evm_nand_bbt_mirror_descr = {
      .options    = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE |
                    NAND_BBT_WRITE | NAND_BBT_2BIT |
                    NAND_BBT_VERSION | NAND_BBT_PERCHIP,
      .offs       = 2,
      .len        = 4,
      .veroffs    = 16,
      .maxblocks  = 4,
      .pattern    = da830_evm_nand_mirror_pattern
};

static struct davinci_aemif_timing da830_evm_nandflash_timing = {
      .wsetup         = 24,
      .wstrobe        = 21,
      .whold          = 14,
      .rsetup         = 19,
      .rstrobe        = 50,
      .rhold          = 0,
      .ta             = 20,
};

static struct davinci_nand_pdata da830_evm_nand_pdata = {
      .parts            = da830_evm_nand_partitions,
      .nr_parts   = ARRAY_SIZE(da830_evm_nand_partitions),
      .ecc_mode   = NAND_ECC_HW,
      .ecc_bits   = 4,
      .options    = NAND_USE_FLASH_BBT,
      .bbt_td           = &da830_evm_nand_bbt_main_descr,
      .bbt_md           = &da830_evm_nand_bbt_mirror_descr,
      .timing         = &da830_evm_nandflash_timing,
};

static struct resource da830_evm_nand_resources[] = {
      [0] = {           /* First memory resource is NAND I/O window */
            .start      = DA8XX_AEMIF_CS3_BASE,
            .end  = DA8XX_AEMIF_CS3_BASE + PAGE_SIZE - 1,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {           /* Second memory resource is AEMIF control registers */
            .start      = DA8XX_AEMIF_CTL_BASE,
            .end  = DA8XX_AEMIF_CTL_BASE + SZ_32K - 1,
            .flags      = IORESOURCE_MEM,
      },
};

static struct platform_device da830_evm_nand_device = {
      .name       = "davinci_nand",
      .id         = 1,
      .dev        = {
            .platform_data    = &da830_evm_nand_pdata,
      },
      .num_resources    = ARRAY_SIZE(da830_evm_nand_resources),
      .resource   = da830_evm_nand_resources,
};

static inline void da830_evm_init_nand(int mux_mode)
{
      int ret;

      if (HAS_MMC) {
            pr_warning("WARNING: both MMC/SD and NAND are "
                        "enabled, but they share AEMIF pins.\n"
                        "\tDisable MMC/SD for NAND support.\n");
            return;
      }

      ret = davinci_cfg_reg_list(da830_evm_emif25_pins);
      if (ret)
            pr_warning("da830_evm_init: emif25 mux setup failed: %d\n",
                        ret);

      ret = platform_device_register(&da830_evm_nand_device);
      if (ret)
            pr_warning("da830_evm_init: NAND device not registered.\n");

      gpio_direction_output(mux_mode, 1);
}
#else
static inline void da830_evm_init_nand(int mux_mode) { }
#endif

#ifdef CONFIG_DA830_UI_LCD
static inline void da830_evm_init_lcdc(int mux_mode)
{
      int ret;

      ret = davinci_cfg_reg_list(da830_lcdcntl_pins);
      if (ret)
            pr_warning("da830_evm_init: lcdcntl mux setup failed: %d\n",
                        ret);

      ret = da8xx_register_lcdc(&sharp_lcd035q3dg01_pdata);
      if (ret)
            pr_warning("da830_evm_init: lcd setup failed: %d\n", ret);

      gpio_direction_output(mux_mode, 0);
}
#else
static inline void da830_evm_init_lcdc(int mux_mode) { }
#endif

static struct at24_platform_data da830_evm_i2c_eeprom_info = {
      .byte_len   = SZ_256K / 8,
      .page_size  = 64,
      .flags            = AT24_FLAG_ADDR16,
      .setup            = davinci_get_mac_addr,
      .context    = (void *)0x7f00,
};

static int __init da830_evm_ui_expander_setup(struct i2c_client *client,
            int gpio, unsigned ngpio, void *context)
{
      gpio_request(gpio + 6, "UI MUX_MODE");

      /* Drive mux mode low to match the default without UI card */
      gpio_direction_output(gpio + 6, 0);

      da830_evm_init_lcdc(gpio + 6);

      da830_evm_init_nand(gpio + 6);

      return 0;
}

static int da830_evm_ui_expander_teardown(struct i2c_client *client, int gpio,
            unsigned ngpio, void *context)
{
      gpio_free(gpio + 6);
      return 0;
}

static struct pcf857x_platform_data __initdata da830_evm_ui_expander_info = {
      .gpio_base  = DAVINCI_N_GPIO,
      .setup            = da830_evm_ui_expander_setup,
      .teardown   = da830_evm_ui_expander_teardown,
};

static struct i2c_board_info __initdata da830_evm_i2c_devices[] = {
      {
            I2C_BOARD_INFO("24c256", 0x50),
            .platform_data    = &da830_evm_i2c_eeprom_info,
      },
      {
            I2C_BOARD_INFO("tlv320aic3x", 0x18),
      },
      {
            I2C_BOARD_INFO("pcf8574", 0x3f),
            .platform_data    = &da830_evm_ui_expander_info,
      },
};

static struct davinci_i2c_platform_data da830_evm_i2c_0_pdata = {
      .bus_freq   = 100,      /* kHz */
      .bus_delay  = 0,  /* usec */
};

/*
 * The following EDMA channels/slots are not being used by drivers (for
 * example: Timer, GPIO, UART events etc) on da830/omap-l137 EVM, hence
 * they are being reserved for codecs on the DSP side.
 */
static const s16 da830_dma_rsv_chans[][2] = {
      /* (offset, number) */
      { 8,  2},
      {12,  2},
      {24,  4},
      {30,  2},
      {-1, -1}
};

static const s16 da830_dma_rsv_slots[][2] = {
      /* (offset, number) */
      { 8,  2},
      {12,  2},
      {24,  4},
      {30, 26},
      {-1, -1}
};

static struct edma_rsv_info da830_edma_rsv[] = {
      {
            .rsv_chans  = da830_dma_rsv_chans,
            .rsv_slots  = da830_dma_rsv_slots,
      },
};

static __init void da830_evm_init(void)
{
      struct davinci_soc_info *soc_info = &davinci_soc_info;
      int ret;

      ret = da830_register_edma(da830_edma_rsv);
      if (ret)
            pr_warning("da830_evm_init: edma registration failed: %d\n",
                        ret);

      ret = davinci_cfg_reg_list(da830_i2c0_pins);
      if (ret)
            pr_warning("da830_evm_init: i2c0 mux setup failed: %d\n",
                        ret);

      ret = da8xx_register_i2c(0, &da830_evm_i2c_0_pdata);
      if (ret)
            pr_warning("da830_evm_init: i2c0 registration failed: %d\n",
                        ret);

      da830_evm_usb_init();

      soc_info->emac_pdata->rmii_en = 1;
      soc_info->emac_pdata->phy_id = DA830_EVM_PHY_ID;

      ret = davinci_cfg_reg_list(da830_cpgmac_pins);
      if (ret)
            pr_warning("da830_evm_init: cpgmac mux setup failed: %d\n",
                        ret);

      ret = da8xx_register_emac();
      if (ret)
            pr_warning("da830_evm_init: emac registration failed: %d\n",
                        ret);

      ret = da8xx_register_watchdog();
      if (ret)
            pr_warning("da830_evm_init: watchdog registration failed: %d\n",
                        ret);

      davinci_serial_init(&da830_evm_uart_config);
      i2c_register_board_info(1, da830_evm_i2c_devices,
                  ARRAY_SIZE(da830_evm_i2c_devices));

      ret = davinci_cfg_reg_list(da830_evm_mcasp1_pins);
      if (ret)
            pr_warning("da830_evm_init: mcasp1 mux setup failed: %d\n",
                        ret);

      da8xx_register_mcasp(1, &da830_evm_snd_data);

      da830_evm_init_mmc();

      ret = da8xx_register_rtc();
      if (ret)
            pr_warning("da830_evm_init: rtc setup failed: %d\n", ret);
}

#ifdef CONFIG_SERIAL_8250_CONSOLE
static int __init da830_evm_console_init(void)
{
      if (!machine_is_davinci_da830_evm())
            return 0;

      return add_preferred_console("ttyS", 2, "115200");
}
console_initcall(da830_evm_console_init);
#endif

static void __init da830_evm_map_io(void)
{
      da830_init();
}

MACHINE_START(DAVINCI_DA830_EVM, "DaVinci DA830/OMAP-L137/AM17x EVM")
      .boot_params      = (DA8XX_DDR_BASE + 0x100),
      .map_io           = da830_evm_map_io,
      .init_irq   = cp_intc_init,
      .timer            = &davinci_timer,
      .init_machine     = da830_evm_init,
MACHINE_END

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