kurobox_pro-setup.c

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/*
 * arch/arm/mach-orion5x/kurobox_pro-setup.c
 *
 * Maintainer: Ronen Shitrit <[email protected]>
 *
 * 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/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/nand.h>
#include <linux/mv643xx_eth.h>
#include <linux/i2c.h>
#include <linux/serial_reg.h>
#include <linux/ata_platform.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/pci.h>
#include <mach/orion5x.h>
#include <linux/platform_data/mtd-orion_nand.h>
#include "common.h"
#include "mpp.h"

/*****************************************************************************
 * KUROBOX-PRO Info
 ****************************************************************************/

/*
 * 256K NOR flash Device bus boot chip select
 */

#define KUROBOX_PRO_NOR_BOOT_BASE   0xf4000000
#define KUROBOX_PRO_NOR_BOOT_SIZE   SZ_256K

/*
 * 256M NAND flash on Device bus chip select 1
 */

#define KUROBOX_PRO_NAND_BASE       0xfc000000
#define KUROBOX_PRO_NAND_SIZE       SZ_2M

/*****************************************************************************
 * 256MB NAND Flash on Device bus CS0
 ****************************************************************************/

static struct mtd_partition kurobox_pro_nand_parts[] = {
    {
        .name   = "uImage",
        .offset = 0,
        .size   = SZ_4M,
    }, {
        .name   = "rootfs",
        .offset = SZ_4M,
        .size   = SZ_64M,
    }, {
        .name   = "extra",
        .offset = SZ_4M + SZ_64M,
        .size   = SZ_256M - (SZ_4M + SZ_64M),
    },
};

static struct resource kurobox_pro_nand_resource = {
    .flags      = IORESOURCE_MEM,
    .start      = KUROBOX_PRO_NAND_BASE,
    .end        = KUROBOX_PRO_NAND_BASE + KUROBOX_PRO_NAND_SIZE - 1,
};

static struct orion_nand_data kurobox_pro_nand_data = {
    .parts      = kurobox_pro_nand_parts,
    .nr_parts   = ARRAY_SIZE(kurobox_pro_nand_parts),
    .cle        = 0,
    .ale        = 1,
    .width      = 8,
};

static struct platform_device kurobox_pro_nand_flash = {
    .name       = "orion_nand",
    .id     = -1,
    .dev        = {
        .platform_data  = &kurobox_pro_nand_data,
    },
    .resource   = &kurobox_pro_nand_resource,
    .num_resources  = 1,
};

/*****************************************************************************
 * 256KB NOR Flash on BOOT Device
 ****************************************************************************/

static struct physmap_flash_data kurobox_pro_nor_flash_data = {
    .width      = 1,
};

static struct resource kurobox_pro_nor_flash_resource = {
    .flags          = IORESOURCE_MEM,
    .start          = KUROBOX_PRO_NOR_BOOT_BASE,
    .end            = KUROBOX_PRO_NOR_BOOT_BASE + KUROBOX_PRO_NOR_BOOT_SIZE - 1,
};

static struct platform_device kurobox_pro_nor_flash = {
    .name           = "physmap-flash",
    .id         = 0,
    .dev        = {
        .platform_data  = &kurobox_pro_nor_flash_data,
    },
    .num_resources      = 1,
    .resource       = &kurobox_pro_nor_flash_resource,
};

/*****************************************************************************
 * PCI
 ****************************************************************************/

static int __init kurobox_pro_pci_map_irq(const struct pci_dev *dev, u8 slot,
    u8 pin)
{
    int irq;

    /*
     * Check for devices with hard-wired IRQs.
     */
    irq = orion5x_pci_map_irq(dev, slot, pin);
    if (irq != -1)
        return irq;

    /*
     * PCI isn't used on the Kuro
     */
    return -1;
}

static struct hw_pci kurobox_pro_pci __initdata = {
    .nr_controllers = 2,
    .setup      = orion5x_pci_sys_setup,
    .scan       = orion5x_pci_sys_scan_bus,
    .map_irq    = kurobox_pro_pci_map_irq,
};

static int __init kurobox_pro_pci_init(void)
{
    if (machine_is_kurobox_pro()) {
        orion5x_pci_disable();
        pci_common_init(&kurobox_pro_pci);
    }

    return 0;
}

subsys_initcall(kurobox_pro_pci_init);

/*****************************************************************************
 * Ethernet
 ****************************************************************************/

static struct mv643xx_eth_platform_data kurobox_pro_eth_data = {
    .phy_addr   = MV643XX_ETH_PHY_ADDR(8),
};

/*****************************************************************************
 * RTC 5C372a on I2C bus
 ****************************************************************************/
static struct i2c_board_info __initdata kurobox_pro_i2c_rtc = {
    I2C_BOARD_INFO("rs5c372a", 0x32),
};

/*****************************************************************************
 * SATA
 ****************************************************************************/
static struct mv_sata_platform_data kurobox_pro_sata_data = {
    .n_ports    = 2,
};

/*****************************************************************************
 * Kurobox Pro specific power off method via UART1-attached microcontroller
 ****************************************************************************/

#define UART1_REG(x)    (UART1_VIRT_BASE + ((UART_##x) << 2))

static int kurobox_pro_miconread(unsigned char *buf, int count)
{
    int i;
    int timeout;

    for (i = 0; i < count; i++) {
        timeout = 10;

        while (!(readl(UART1_REG(LSR)) & UART_LSR_DR)) {
            if (--timeout == 0)
                break;
            udelay(1000);
        }

        if (timeout == 0)
            break;
        buf[i] = readl(UART1_REG(RX));
    }

    /* return read bytes */
    return i;
}

static int kurobox_pro_miconwrite(const unsigned char *buf, int count)
{
    int i = 0;

    while (count--) {
        while (!(readl(UART1_REG(LSR)) & UART_LSR_THRE))
            barrier();
        writel(buf[i++], UART1_REG(TX));
    }

    return 0;
}

static int kurobox_pro_miconsend(const unsigned char *data, int count)
{
    int i;
    unsigned char checksum = 0;
    unsigned char recv_buf[40];
    unsigned char send_buf[40];
    unsigned char correct_ack[3];
    int retry = 2;

    /* Generate checksum */
    for (i = 0; i < count; i++)
        checksum -=  data[i];

    do {
        /* Send data */
        kurobox_pro_miconwrite(data, count);

        /* send checksum */
        kurobox_pro_miconwrite(&checksum, 1);

        if (kurobox_pro_miconread(recv_buf, sizeof(recv_buf)) <= 3) {
            printk(KERN_ERR ">%s: receive failed.\n", __func__);

            /* send preamble to clear the receive buffer */
            memset(&send_buf, 0xff, sizeof(send_buf));
            kurobox_pro_miconwrite(send_buf, sizeof(send_buf));

            /* make dummy reads */
            mdelay(100);
            kurobox_pro_miconread(recv_buf, sizeof(recv_buf));
        } else {
            /* Generate expected ack */
            correct_ack[0] = 0x01;
            correct_ack[1] = data[1];
            correct_ack[2] = 0x00;

            /* checksum Check */
            if ((recv_buf[0] + recv_buf[1] + recv_buf[2] +
                 recv_buf[3]) & 0xFF) {
                printk(KERN_ERR ">%s: Checksum Error : "
                    "Received data[%02x, %02x, %02x, %02x]"
                    "\n", __func__, recv_buf[0],
                    recv_buf[1], recv_buf[2], recv_buf[3]);
            } else {
                /* Check Received Data */
                if (correct_ack[0] == recv_buf[0] &&
                    correct_ack[1] == recv_buf[1] &&
                    correct_ack[2] == recv_buf[2]) {
                    /* Interval for next command */
                    mdelay(10);

                    /* Receive ACK */
                    return 0;
                }
            }
            /* Received NAK or illegal Data */
            printk(KERN_ERR ">%s: Error : NAK or Illegal Data "
                    "Received\n", __func__);
        }
    } while (retry--);

    /* Interval for next command */
    mdelay(10);

    return -1;
}

static void kurobox_pro_power_off(void)
{
    const unsigned char watchdogkill[]  = {0x01, 0x35, 0x00};
    const unsigned char shutdownwait[]  = {0x00, 0x0c};
    const unsigned char poweroff[]      = {0x00, 0x06};
    /* 38400 baud divisor */
    const unsigned divisor = ((orion5x_tclk + (8 * 38400)) / (16 * 38400));

    pr_info("%s: triggering power-off...\n", __func__);

    /* hijack uart1 and reset into sane state (38400,8n1,even parity) */
    writel(0x83, UART1_REG(LCR));
    writel(divisor & 0xff, UART1_REG(DLL));
    writel((divisor >> 8) & 0xff, UART1_REG(DLM));
    writel(0x1b, UART1_REG(LCR));
    writel(0x00, UART1_REG(IER));
    writel(0x07, UART1_REG(FCR));
    writel(0x00, UART1_REG(MCR));

    /* Send the commands to shutdown the Kurobox Pro */
    kurobox_pro_miconsend(watchdogkill, sizeof(watchdogkill)) ;
    kurobox_pro_miconsend(shutdownwait, sizeof(shutdownwait)) ;
    kurobox_pro_miconsend(poweroff, sizeof(poweroff));
}

/*****************************************************************************
 * General Setup
 ****************************************************************************/
static unsigned int kurobox_pro_mpp_modes[] __initdata = {
    MPP0_UNUSED,
    MPP1_UNUSED,
    MPP2_GPIO,      /* GPIO Micon */
    MPP3_GPIO,      /* GPIO Rtc */
    MPP4_UNUSED,
    MPP5_UNUSED,
    MPP6_NAND,      /* NAND Flash REn */
    MPP7_NAND,      /* NAND Flash WEn */
    MPP8_UNUSED,
    MPP9_UNUSED,
    MPP10_UNUSED,
    MPP11_UNUSED,
    MPP12_SATA_LED,     /* SATA 0 presence */
    MPP13_SATA_LED,     /* SATA 1 presence */
    MPP14_SATA_LED,     /* SATA 0 active */
    MPP15_SATA_LED,     /* SATA 1 active */
    MPP16_UART,     /* UART1 RXD */
    MPP17_UART,     /* UART1 TXD */
    MPP18_UART,     /* UART1 CTSn */
    MPP19_UART,     /* UART1 RTSn */
    0,
};

static void __init kurobox_pro_init(void)
{
    /*
     * Setup basic Orion functions. Need to be called early.
     */
    orion5x_init();

    orion5x_mpp_conf(kurobox_pro_mpp_modes);

    /*
     * Configure peripherals.
     */
    orion5x_ehci0_init();
    orion5x_ehci1_init();
    orion5x_eth_init(&kurobox_pro_eth_data);
    orion5x_i2c_init();
    orion5x_sata_init(&kurobox_pro_sata_data);
    orion5x_uart0_init();
    orion5x_uart1_init();
    orion5x_xor_init();

    orion5x_setup_dev_boot_win(KUROBOX_PRO_NOR_BOOT_BASE,
                   KUROBOX_PRO_NOR_BOOT_SIZE);
    platform_device_register(&kurobox_pro_nor_flash);

    if (machine_is_kurobox_pro()) {
        orion5x_setup_dev0_win(KUROBOX_PRO_NAND_BASE,
                       KUROBOX_PRO_NAND_SIZE);
        platform_device_register(&kurobox_pro_nand_flash);
    }

    i2c_register_board_info(0, &kurobox_pro_i2c_rtc, 1);

    /* register Kurobox Pro specific power-off method */
    pm_power_off = kurobox_pro_power_off;
}

#ifdef CONFIG_MACH_KUROBOX_PRO
MACHINE_START(KUROBOX_PRO, "Buffalo/Revogear Kurobox Pro")
    /* Maintainer: Ronen Shitrit <[email protected]> */
    .atag_offset    = 0x100,
    .init_machine   = kurobox_pro_init,
    .map_io     = orion5x_map_io,
    .init_early = orion5x_init_early,
    .init_irq   = orion5x_init_irq,
    .timer      = &orion5x_timer,
    .fixup      = tag_fixup_mem32,
    .restart    = orion5x_restart,
MACHINE_END
#endif

#ifdef CONFIG_MACH_LINKSTATION_PRO
MACHINE_START(LINKSTATION_PRO, "Buffalo Linkstation Pro/Live")
    /* Maintainer: Byron Bradley <[email protected]> */
    .atag_offset    = 0x100,
    .init_machine   = kurobox_pro_init,
    .map_io     = orion5x_map_io,
    .init_early = orion5x_init_early,
    .init_irq   = orion5x_init_irq,
    .timer      = &orion5x_timer,
    .fixup      = tag_fixup_mem32,
    .restart    = orion5x_restart,
MACHINE_END
#endif