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ts209-setup.c

/*
 * QNAP TS-109/TS-209 Board Setup
 *
 * Maintainer: Byron Bradley <byron.bbradley@gmail.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/nand.h>
#include <linux/mv643xx_eth.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/i2c.h>
#include <linux/serial_reg.h>
#include <linux/ata_platform.h>
#include <asm/mach-types.h>
#include <asm/gpio.h>
#include <asm/mach/arch.h>
#include <asm/mach/pci.h>
#include <asm/arch/orion5x.h>
#include "common.h"

#define QNAP_TS209_NOR_BOOT_BASE 0xf4000000
#define QNAP_TS209_NOR_BOOT_SIZE SZ_8M

/****************************************************************************
 * 8MiB NOR flash. The struct mtd_partition is not in the same order as the
 *     partitions on the device because we want to keep compatability with
 *     existing QNAP firmware.
 *
 * Layout as used by QNAP:
 *  [2] 0x00000000-0x00200000 : "Kernel"
 *  [3] 0x00200000-0x00600000 : "RootFS1"
 *  [4] 0x00600000-0x00700000 : "RootFS2"
 *  [6] 0x00700000-0x00760000 : "NAS Config" (read-only)
 *  [5] 0x00760000-0x00780000 : "U-Boot Config"
 *  [1] 0x00780000-0x00800000 : "U-Boot" (read-only)
 ***************************************************************************/
static struct mtd_partition qnap_ts209_partitions[] = {
      {
            .name       = "U-Boot",
            .size       = 0x00080000,
            .offset     = 0x00780000,
            .mask_flags = MTD_WRITEABLE,
      }, {
            .name   = "Kernel",
            .size   = 0x00200000,
            .offset = 0,
      }, {
            .name   = "RootFS1",
            .size   = 0x00400000,
            .offset = 0x00200000,
      }, {
            .name   = "RootFS2",
            .size   = 0x00100000,
            .offset = 0x00600000,
      }, {
            .name   = "U-Boot Config",
            .size   = 0x00020000,
            .offset = 0x00760000,
      }, {
            .name       = "NAS Config",
            .size       = 0x00060000,
            .offset     = 0x00700000,
            .mask_flags = MTD_WRITEABLE,
      }
};

static struct physmap_flash_data qnap_ts209_nor_flash_data = {
      .width    = 1,
      .parts    = qnap_ts209_partitions,
      .nr_parts = ARRAY_SIZE(qnap_ts209_partitions)
};

static struct resource qnap_ts209_nor_flash_resource = {
      .flags = IORESOURCE_MEM,
      .start = QNAP_TS209_NOR_BOOT_BASE,
      .end   = QNAP_TS209_NOR_BOOT_BASE + QNAP_TS209_NOR_BOOT_SIZE - 1,
};

static struct platform_device qnap_ts209_nor_flash = {
      .name          = "physmap-flash",
      .id            = 0,
      .dev           = { .platform_data = &qnap_ts209_nor_flash_data, },
      .resource      = &qnap_ts209_nor_flash_resource,
      .num_resources = 1,
};

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

#define QNAP_TS209_PCI_SLOT0_OFFS   7
#define QNAP_TS209_PCI_SLOT0_IRQ_PIN      6
#define QNAP_TS209_PCI_SLOT1_IRQ_PIN      7

void __init qnap_ts209_pci_preinit(void)
{
      int pin;

      /*
       * Configure PCI GPIO IRQ pins
       */
      pin = QNAP_TS209_PCI_SLOT0_IRQ_PIN;
      if (gpio_request(pin, "PCI Int1") == 0) {
            if (gpio_direction_input(pin) == 0) {
                  set_irq_type(gpio_to_irq(pin), IRQT_LOW);
            } else {
                  printk(KERN_ERR "qnap_ts209_pci_preinit failed to "
                              "set_irq_type pin %d\n", pin);
                  gpio_free(pin);
            }
      } else {
            printk(KERN_ERR "qnap_ts209_pci_preinit failed to gpio_request "
                        "%d\n", pin);
      }

      pin = QNAP_TS209_PCI_SLOT1_IRQ_PIN;
      if (gpio_request(pin, "PCI Int2") == 0) {
            if (gpio_direction_input(pin) == 0) {
                  set_irq_type(gpio_to_irq(pin), IRQT_LOW);
            } else {
                  printk(KERN_ERR "qnap_ts209_pci_preinit failed "
                              "to set_irq_type pin %d\n", pin);
                  gpio_free(pin);
            }
      } else {
            printk(KERN_ERR "qnap_ts209_pci_preinit failed to gpio_request "
                        "%d\n", pin);
      }
}

static int __init qnap_ts209_pci_map_irq(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 IRQs are connected via GPIOs.
       */
      switch (slot - QNAP_TS209_PCI_SLOT0_OFFS) {
      case 0:
            return gpio_to_irq(QNAP_TS209_PCI_SLOT0_IRQ_PIN);
      case 1:
            return gpio_to_irq(QNAP_TS209_PCI_SLOT1_IRQ_PIN);
      default:
            return -1;
      }
}

static struct hw_pci qnap_ts209_pci __initdata = {
      .nr_controllers = 2,
      .preinit        = qnap_ts209_pci_preinit,
      .swizzle        = pci_std_swizzle,
      .setup          = orion5x_pci_sys_setup,
      .scan           = orion5x_pci_sys_scan_bus,
      .map_irq        = qnap_ts209_pci_map_irq,
};

static int __init qnap_ts209_pci_init(void)
{
      if (machine_is_ts_x09())
            pci_common_init(&qnap_ts209_pci);

      return 0;
}

subsys_initcall(qnap_ts209_pci_init);

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

static struct mv643xx_eth_platform_data qnap_ts209_eth_data = {
      .phy_addr       = 8,
      .force_phy_addr = 1,
};

static int __init parse_hex_nibble(char n)
{
      if (n >= '0' && n <= '9')
            return n - '0';

      if (n >= 'A' && n <= 'F')
            return n - 'A' + 10;

      if (n >= 'a' && n <= 'f')
            return n - 'a' + 10;

      return -1;
}

static int __init parse_hex_byte(const char *b)
{
      int hi;
      int lo;

      hi = parse_hex_nibble(b[0]);
      lo = parse_hex_nibble(b[1]);

      if (hi < 0 || lo < 0)
            return -1;

      return (hi << 4) | lo;
}

static int __init check_mac_addr(const char *addr_str)
{
      u_int8_t addr[6];
      int i;

      for (i = 0; i < 6; i++) {
            int byte;

            /*
             * Enforce "xx:xx:xx:xx:xx:xx\n" format.
             */
            if (addr_str[(i * 3) + 2] != ((i < 5) ? ':' : '\n'))
                  return -1;

            byte = parse_hex_byte(addr_str + (i * 3));
            if (byte < 0)
                  return -1;
            addr[i] = byte;
      }

      printk(KERN_INFO "ts209: found ethernet mac address ");
      for (i = 0; i < 6; i++)
            printk("%.2x%s", addr[i], (i < 5) ? ":" : ".\n");

      memcpy(qnap_ts209_eth_data.mac_addr, addr, 6);

      return 0;
}

/*
 * The 'NAS Config' flash partition has an ext2 filesystem which
 * contains a file that has the ethernet MAC address in plain text
 * (format "xx:xx:xx:xx:xx:xx\n".)
 */
static void __init ts209_find_mac_addr(void)
{
      unsigned long addr;

      for (addr = 0x00700000; addr < 0x00760000; addr += 1024) {
            char *nor_page;
            int ret = 0;

            nor_page = ioremap(QNAP_TS209_NOR_BOOT_BASE + addr, 1024);
            if (nor_page != NULL) {
                  ret = check_mac_addr(nor_page);
                  iounmap(nor_page);
            }

            if (ret == 0)
                  break;
      }
}

/*****************************************************************************
 * RTC S35390A on I2C bus
 ****************************************************************************/

#define TS209_RTC_GPIO  3

static struct i2c_board_info __initdata qnap_ts209_i2c_rtc = {
      I2C_BOARD_INFO("s35390a", 0x30),
       .irq         = 0,
};

/****************************************************************************
 * GPIO Attached Keys
 *     Power button is attached to the PIC microcontroller
 ****************************************************************************/

#define QNAP_TS209_GPIO_KEY_MEDIA   1
#define QNAP_TS209_GPIO_KEY_RESET   2

static struct gpio_keys_button qnap_ts209_buttons[] = {
      {
            .code       = KEY_RESTART,
            .gpio       = QNAP_TS209_GPIO_KEY_MEDIA,
            .desc       = "USB Copy Button",
            .active_low = 1,
      },
      {
            .code       = KEY_POWER,
            .gpio       = QNAP_TS209_GPIO_KEY_RESET,
            .desc       = "Reset Button",
            .active_low = 1,
      }
};

static struct gpio_keys_platform_data qnap_ts209_button_data = {
      .buttons    = qnap_ts209_buttons,
      .nbuttons       = ARRAY_SIZE(qnap_ts209_buttons),
};

static struct platform_device qnap_ts209_button_device = {
      .name       = "gpio-keys",
      .id         = -1,
      .num_resources    = 0,
      .dev        = { .platform_data  = &qnap_ts209_button_data, },
};

/*****************************************************************************
 * SATA
 ****************************************************************************/
static struct mv_sata_platform_data qnap_ts209_sata_data = {
      .n_ports        = 2,
};

/*****************************************************************************

 * General Setup
 ****************************************************************************/

static struct platform_device *qnap_ts209_devices[] __initdata = {
      &qnap_ts209_nor_flash,
      &qnap_ts209_button_device,
};

/*
 * QNAP TS-[12]09 specific power off method via UART1-attached PIC
 */

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

static void qnap_ts209_power_off(void)
{
      /* 19200 baud divisor */
      const unsigned divisor = ((ORION5X_TCLK + (8 * 19200)) / (16 * 19200));

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

      /* hijack uart1 and reset into sane state (19200,8n1) */
      orion5x_write(UART1_REG(LCR), 0x83);
      orion5x_write(UART1_REG(DLL), divisor & 0xff);
      orion5x_write(UART1_REG(DLM), (divisor >> 8) & 0xff);
      orion5x_write(UART1_REG(LCR), 0x03);
      orion5x_write(UART1_REG(IER), 0x00);
      orion5x_write(UART1_REG(FCR), 0x00);
      orion5x_write(UART1_REG(MCR), 0x00);

      /* send the power-off command 'A' to PIC */
      orion5x_write(UART1_REG(TX), 'A');
}

static void __init qnap_ts209_init(void)
{
      /*
       * Setup basic Orion functions. Need to be called early.
       */
      orion5x_init();

      /*
       * Setup flash mapping
       */
      orion5x_setup_dev_boot_win(QNAP_TS209_NOR_BOOT_BASE,
                      QNAP_TS209_NOR_BOOT_SIZE);

      /*
       * Open a special address decode windows for the PCIe WA.
       */
      orion5x_setup_pcie_wa_win(ORION5X_PCIE_WA_PHYS_BASE,
                        ORION5X_PCIE_WA_SIZE);

      /*
       * Setup Multiplexing Pins --
       * MPP[0] Reserved
       * MPP[1] USB copy button (0 active)
       * MPP[2] Load defaults button (0 active)
       * MPP[3] GPIO RTC
       * MPP[4-5] Reserved
       * MPP[6] PCI Int A
       * MPP[7] PCI Int B
       * MPP[8-11] Reserved
       * MPP[12] SATA 0 presence
       * MPP[13] SATA 1 presence
       * MPP[14] SATA 0 active
       * MPP[15] SATA 1 active
       * MPP[16] UART1 RXD
       * MPP[17] UART1 TXD
       * MPP[18] SW_RST (0 active)
       * MPP[19] Reserved
       * MPP[20] PCI clock 0
       * MPP[21] PCI clock 1
       * MPP[22] USB 0 over current
       * MPP[23-25] Reserved
       */
      orion5x_write(MPP_0_7_CTRL, 0x3);
      orion5x_write(MPP_8_15_CTRL, 0x55550000);
      orion5x_write(MPP_16_19_CTRL, 0x5500);
      orion5x_gpio_set_valid_pins(0x3cc0fff);

      /* register ts209 specific power-off method */
      pm_power_off = qnap_ts209_power_off;

      platform_add_devices(qnap_ts209_devices,
                        ARRAY_SIZE(qnap_ts209_devices));

      /* Get RTC IRQ and register the chip */
      if (gpio_request(TS209_RTC_GPIO, "rtc") == 0) {
            if (gpio_direction_input(TS209_RTC_GPIO) == 0)
                  qnap_ts209_i2c_rtc.irq = gpio_to_irq(TS209_RTC_GPIO);
            else
                  gpio_free(TS209_RTC_GPIO);
      }
      if (qnap_ts209_i2c_rtc.irq == 0)
            pr_warning("qnap_ts209_init: failed to get RTC IRQ\n");
      i2c_register_board_info(0, &qnap_ts209_i2c_rtc, 1);

      ts209_find_mac_addr();
      orion5x_eth_init(&qnap_ts209_eth_data);

      orion5x_sata_init(&qnap_ts209_sata_data);
}

MACHINE_START(TS209, "QNAP TS-109/TS-209")
      /* Maintainer:  Byron Bradley <byron.bbradley@gmail.com> */
      .phys_io    = ORION5X_REGS_PHYS_BASE,
      .io_pg_offst      = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
      .boot_params      = 0x00000100,
      .init_machine     = qnap_ts209_init,
      .map_io           = orion5x_map_io,
      .init_irq   = orion5x_init_irq,
      .timer            = &orion5x_timer,
      .fixup            = tag_fixup_mem32,
MACHINE_END

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