board-da830-evm.c

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/*
 * TI DA830/OMAP L137 EVM board
 *
 * Author: Mark A. Greer <[email protected]>
 * 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 <linux/spi/spi.h>
#include <linux/spi/flash.h>

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

#include <mach/cp_intc.h>
#include <mach/mux.h>
#include <linux/platform_data/mtd-davinci.h>
#include <mach/da8xx.h>
#include <linux/platform_data/usb-davinci.h>
#include <linux/platform_data/mtd-davinci-aemif.h>
#include <linux/platform_data/spi-davinci.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,
    .bbt_options    = NAND_BBT_USE_FLASH,
    .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 struct mtd_partition da830evm_spiflash_part[] = {
    [0] = {
        .name = "DSP-UBL",
        .offset = 0,
        .size = SZ_8K,
        .mask_flags = MTD_WRITEABLE,
    },
    [1] = {
        .name = "ARM-UBL",
        .offset = MTDPART_OFS_APPEND,
        .size = SZ_16K + SZ_8K,
        .mask_flags = MTD_WRITEABLE,
    },
    [2] = {
        .name = "U-Boot",
        .offset = MTDPART_OFS_APPEND,
        .size = SZ_256K - SZ_32K,
        .mask_flags = MTD_WRITEABLE,
    },
    [3] = {
        .name = "U-Boot-Environment",
        .offset = MTDPART_OFS_APPEND,
        .size = SZ_16K,
        .mask_flags = 0,
    },
    [4] = {
        .name = "Kernel",
        .offset = MTDPART_OFS_APPEND,
        .size = MTDPART_SIZ_FULL,
        .mask_flags = 0,
    },
};

static struct flash_platform_data da830evm_spiflash_data = {
    .name       = "m25p80",
    .parts      = da830evm_spiflash_part,
    .nr_parts   = ARRAY_SIZE(da830evm_spiflash_part),
    .type       = "w25x32",
};

static struct davinci_spi_config da830evm_spiflash_cfg = {
    .io_type    = SPI_IO_TYPE_DMA,
    .c2tdelay   = 8,
    .t2cdelay   = 8,
};

static struct spi_board_info da830evm_spi_info[] = {
    {
        .modalias       = "m25p80",
        .platform_data      = &da830evm_spiflash_data,
        .controller_data    = &da830evm_spiflash_cfg,
        .mode           = SPI_MODE_0,
        .max_speed_hz       = 30000000,
        .bus_num        = 0,
        .chip_select        = 0,
    },
};

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);

    ret = da8xx_register_spi(0, da830evm_spi_info,
                 ARRAY_SIZE(da830evm_spi_info));
    if (ret)
        pr_warning("da830_evm_init: spi 0 registration 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")
    .atag_offset    = 0x100,
    .map_io     = da830_evm_map_io,
    .init_irq   = cp_intc_init,
    .timer      = &davinci_timer,
    .init_machine   = da830_evm_init,
    .init_late  = davinci_init_late,
    .dma_zone_size  = SZ_128M,
    .restart    = da8xx_restart,
MACHINE_END