atstk1002.c

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/*
 * ATSTK1002/ATSTK1006 daughterboard-specific init code
 *
 * Copyright (C) 2005-2007 Atmel Corporation
 *
 * 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.
 */
#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/spi/spi.h>
#include <linux/spi/at73c213.h>
#include <linux/atmel-mci.h>

#include <video/atmel_lcdc.h>

#include <asm/io.h>
#include <asm/setup.h>

#include <mach/at32ap700x.h>
#include <mach/board.h>
#include <mach/init.h>
#include <mach/portmux.h>

#include "atstk1000.h"

/* Oscillator frequencies. These are board specific */
unsigned long at32_board_osc_rates[3] = {
    [0] = 32768,    /* 32.768 kHz on RTC osc */
    [1] = 20000000, /* 20 MHz on osc0 */
    [2] = 12000000, /* 12 MHz on osc1 */
};

/*
 * The ATSTK1006 daughterboard is very similar to the ATSTK1002. Both
 * have the AT32AP7000 chip on board; the difference is that the
 * STK1006 has 128 MB SDRAM (the STK1002 uses the 8 MB SDRAM chip on
 * the STK1000 motherboard) and 256 MB NAND flash (the STK1002 has
 * none.)
 *
 * The RAM difference is handled by the boot loader, so the only
 * difference we end up handling here is the NAND flash.
 */
#ifdef CONFIG_BOARD_ATSTK1006
#include <linux/mtd/partitions.h>
#include <mach/smc.h>

static struct smc_timing nand_timing __initdata = {
    .ncs_read_setup     = 0,
    .nrd_setup      = 10,
    .ncs_write_setup    = 0,
    .nwe_setup      = 10,

    .ncs_read_pulse     = 30,
    .nrd_pulse      = 15,
    .ncs_write_pulse    = 30,
    .nwe_pulse      = 15,

    .read_cycle     = 30,
    .write_cycle        = 30,

    .ncs_read_recover   = 0,
    .nrd_recover        = 15,
    .ncs_write_recover  = 0,
    /* WE# high -> RE# low min 60 ns */
    .nwe_recover        = 50,
};

static struct smc_config nand_config __initdata = {
    .bus_width      = 1,
    .nrd_controlled     = 1,
    .nwe_controlled     = 1,
    .nwait_mode     = 0,
    .byte_write     = 0,
    .tdf_cycles     = 2,
    .tdf_mode       = 0,
};

static struct mtd_partition nand_partitions[] = {
    {
        .name       = "main",
        .offset     = 0x00000000,
        .size       = MTDPART_SIZ_FULL,
    },
};

static struct atmel_nand_data atstk1006_nand_data __initdata = {
    .cle        = 21,
    .ale        = 22,
    .rdy_pin    = GPIO_PIN_PB(30),
    .enable_pin = GPIO_PIN_PB(29),
    .ecc_mode   = NAND_ECC_SOFT,
    .parts      = nand_partitions,
    .num_parts  = ARRAY_SIZE(nand_partitions),
};
#endif

struct eth_addr {
    u8 addr[6];
};

static struct eth_addr __initdata hw_addr[2];
static struct macb_platform_data __initdata eth_data[2] = {
    {
        /*
         * The MDIO pullups on STK1000 are a bit too weak for
         * the autodetection to work properly, so we have to
         * mask out everything but the correct address.
         */
        .phy_mask   = ~(1U << 16),
    },
    {
        .phy_mask   = ~(1U << 17),
    },
};

#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static struct at73c213_board_info at73c213_data = {
    .ssc_id     = 0,
    .shortname  = "AVR32 STK1000 external DAC",
};
#endif

#ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
static struct spi_board_info spi0_board_info[] __initdata = {
#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
    {
        /* AT73C213 */
        .modalias   = "at73c213",
        .max_speed_hz   = 200000,
        .chip_select    = 0,
        .mode       = SPI_MODE_1,
        .platform_data  = &at73c213_data,
    },
#endif
    {
        /* QVGA display */
        .modalias   = "ltv350qv",
        .max_speed_hz   = 16000000,
        .chip_select    = 1,
        .mode       = SPI_MODE_3,
    },
};
#endif

#ifdef CONFIG_BOARD_ATSTK100X_SPI1
static struct spi_board_info spi1_board_info[] __initdata = { {
    /* patch in custom entries here */
} };
#endif

/*
 * The next two functions should go away as the boot loader is
 * supposed to initialize the macb address registers with a valid
 * ethernet address. But we need to keep it around for a while until
 * we can be reasonably sure the boot loader does this.
 *
 * The phy_id is ignored as the driver will probe for it.
 */
static int __init parse_tag_ethernet(struct tag *tag)
{
    int i;

    i = tag->u.ethernet.mac_index;
    if (i < ARRAY_SIZE(hw_addr))
        memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
               sizeof(hw_addr[i].addr));

    return 0;
}
__tagtable(ATAG_ETHERNET, parse_tag_ethernet);

static void __init set_hw_addr(struct platform_device *pdev)
{
    struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    const u8 *addr;
    void __iomem *regs;
    struct clk *pclk;

    if (!res)
        return;
    if (pdev->id >= ARRAY_SIZE(hw_addr))
        return;

    addr = hw_addr[pdev->id].addr;
    if (!is_valid_ether_addr(addr))
        return;

    /*
     * Since this is board-specific code, we'll cheat and use the
     * physical address directly as we happen to know that it's
     * the same as the virtual address.
     */
    regs = (void __iomem __force *)res->start;
    pclk = clk_get(&pdev->dev, "pclk");
    if (IS_ERR(pclk))
        return;

    clk_enable(pclk);
    __raw_writel((addr[3] << 24) | (addr[2] << 16)
             | (addr[1] << 8) | addr[0], regs + 0x98);
    __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
    clk_disable(pclk);
    clk_put(pclk);
}

#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static void __init atstk1002_setup_extdac(void)
{
    struct clk *gclk;
    struct clk *pll;

    gclk = clk_get(NULL, "gclk0");
    if (IS_ERR(gclk))
        goto err_gclk;
    pll = clk_get(NULL, "pll0");
    if (IS_ERR(pll))
        goto err_pll;

    if (clk_set_parent(gclk, pll)) {
        pr_debug("STK1000: failed to set pll0 as parent for DAC clock\n");
        goto err_set_clk;
    }

    at32_select_periph(GPIO_PIOA_BASE, (1 << 30), GPIO_PERIPH_A, 0);
    at73c213_data.dac_clk = gclk;

err_set_clk:
    clk_put(pll);
err_pll:
    clk_put(gclk);
err_gclk:
    return;
}
#else
static void __init atstk1002_setup_extdac(void)
{

}
#endif /* CONFIG_BOARD_ATSTK1000_EXTDAC */

void __init setup_board(void)
{
#ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
    at32_map_usart(0, 1, 0);    /* USART 0/B: /dev/ttyS1, IRDA */
#else
    at32_map_usart(1, 0, 0);    /* USART 1/A: /dev/ttyS0, DB9 */
#endif
    /* USART 2/unused: expansion connector */
    at32_map_usart(3, 2, 0);    /* USART 3/C: /dev/ttyS2, DB9 */

    at32_setup_serial_console(0);
}

#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM

static struct mci_platform_data __initdata mci0_data = {
    .slot[0] = {
        .bus_width  = 4,

/* MMC card detect requires MACB0 *NOT* be used */
#ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
        .detect_pin = GPIO_PIN_PC(14), /* gpio30/sdcd */
        .wp_pin     = GPIO_PIN_PC(15), /* gpio31/sdwp */
#else
        .detect_pin = -ENODEV,
        .wp_pin     = -ENODEV,
#endif  /* SW6 for sd{cd,wp} routing */
    },
};

#endif  /* SW2 for MMC signal routing */

static int __init atstk1002_init(void)
{
    /*
     * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
     * SDRAM-specific pins so that nobody messes with them.
     */
    at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);

#ifdef CONFIG_BOARD_ATSTK1006
    smc_set_timing(&nand_config, &nand_timing);
    smc_set_configuration(3, &nand_config);
    at32_add_device_nand(0, &atstk1006_nand_data);
#endif

#ifdef  CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
    at32_add_device_usart(1);
#else
    at32_add_device_usart(0);
#endif
    at32_add_device_usart(2);

#ifndef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
    set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW1_CUSTOM
    at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
#endif
#ifdef CONFIG_BOARD_ATSTK100X_SPI1
    at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
    at32_add_device_mci(0, &mci0_data);
#endif
#ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
    set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
#else
    at32_add_device_lcdc(0, &atstk1000_lcdc_data,
                 fbmem_start, fbmem_size,
                 ATMEL_LCDC_PRI_24BIT | ATMEL_LCDC_PRI_CONTROL);
#endif
    at32_add_device_usba(0, NULL);
#ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
    at32_add_device_ssc(0, ATMEL_SSC_TX);
#endif

    atstk1000_setup_j2_leds();
    atstk1002_setup_extdac();

    return 0;
}
postcore_initcall(atstk1002_init);