Logo Search packages:      
Sourcecode: linux version File versions

ts78xx-setup.c

/*
 * arch/arm/mach-orion5x/ts78xx-setup.c
 *
 * Maintainer: Alexander Clouter <alex@digriz.org.uk>
 *
 * 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/platform_device.h>
#include <linux/mtd/physmap.h>
#include <linux/mv643xx_eth.h>
#include <linux/ata_platform.h>
#include <linux/m48t86.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <mach/orion5x.h>
#include "common.h"
#include "mpp.h"

/*****************************************************************************
 * TS-78xx Info
 ****************************************************************************/

/*
 * FPGA - lives where the PCI bus would be at ORION5X_PCI_MEM_PHYS_BASE
 */
#define TS78XX_FPGA_REGS_PHYS_BASE  0xe8000000
#define TS78XX_FPGA_REGS_VIRT_BASE  0xff900000
#define TS78XX_FPGA_REGS_SIZE       SZ_1M

#define TS78XX_FPGA_REGS_SYSCON_ID  (TS78XX_FPGA_REGS_VIRT_BASE | 0x000)
#define TS78XX_FPGA_REGS_SYSCON_LCDI      (TS78XX_FPGA_REGS_VIRT_BASE | 0x004)
#define TS78XX_FPGA_REGS_SYSCON_LCDO      (TS78XX_FPGA_REGS_VIRT_BASE | 0x008)

#define TS78XX_FPGA_REGS_RTC_CTRL   (TS78XX_FPGA_REGS_VIRT_BASE | 0x808)
#define TS78XX_FPGA_REGS_RTC_DATA   (TS78XX_FPGA_REGS_VIRT_BASE | 0x80c)

/*
 * 512kB NOR flash Device
 */
#define TS78XX_NOR_BOOT_BASE        0xff800000
#define TS78XX_NOR_BOOT_SIZE        SZ_512K

/*****************************************************************************
 * I/O Address Mapping
 ****************************************************************************/
static struct map_desc ts78xx_io_desc[] __initdata = {
      {
            .virtual    = TS78XX_FPGA_REGS_VIRT_BASE,
            .pfn        = __phys_to_pfn(TS78XX_FPGA_REGS_PHYS_BASE),
            .length           = TS78XX_FPGA_REGS_SIZE,
            .type       = MT_DEVICE,
      },
};

void __init ts78xx_map_io(void)
{
      orion5x_map_io();
      iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));
}

/*****************************************************************************
 * 512kB NOR Boot Flash - the chip is a M25P40
 ****************************************************************************/
static struct mtd_partition ts78xx_nor_boot_flash_resources[] = {
      {
            .name       = "ts-bootrom",
            .offset           = 0,
            /* only the first 256kB is used */
            .size       = SZ_256K,
            .mask_flags = MTD_WRITEABLE,
      },
};

static struct physmap_flash_data ts78xx_nor_boot_flash_data = {
      .width            = 1,
      .parts            = ts78xx_nor_boot_flash_resources,
      .nr_parts   = ARRAY_SIZE(ts78xx_nor_boot_flash_resources),
};

static struct resource ts78xx_nor_boot_flash_resource = {
      .flags            = IORESOURCE_MEM,
      .start            = TS78XX_NOR_BOOT_BASE,
      .end        = TS78XX_NOR_BOOT_BASE + TS78XX_NOR_BOOT_SIZE - 1,
};

static struct platform_device ts78xx_nor_boot_flash = {
      .name       = "physmap-flash",
      .id         = -1,
      .dev        = {
            .platform_data    = &ts78xx_nor_boot_flash_data,
      },
      .num_resources    = 1,
      .resource   = &ts78xx_nor_boot_flash_resource,
};

/*****************************************************************************
 * Ethernet
 ****************************************************************************/
static struct mv643xx_eth_platform_data ts78xx_eth_data = {
      .phy_addr   = 0,
      .force_phy_addr = 1,
};

/*****************************************************************************
 * RTC M48T86 - nicked^Wborrowed from arch/arm/mach-ep93xx/ts72xx.c
 ****************************************************************************/
#ifdef CONFIG_RTC_DRV_M48T86
static unsigned char ts78xx_rtc_readbyte(unsigned long addr)
{
      writeb(addr, TS78XX_FPGA_REGS_RTC_CTRL);
      return readb(TS78XX_FPGA_REGS_RTC_DATA);
}

static void ts78xx_rtc_writebyte(unsigned char value, unsigned long addr)
{
      writeb(addr, TS78XX_FPGA_REGS_RTC_CTRL);
      writeb(value, TS78XX_FPGA_REGS_RTC_DATA);
}

static struct m48t86_ops ts78xx_rtc_ops = {
      .readbyte   = ts78xx_rtc_readbyte,
      .writebyte  = ts78xx_rtc_writebyte,
};

static struct platform_device ts78xx_rtc_device = {
      .name       = "rtc-m48t86",
      .id         = -1,
      .dev        = {
            .platform_data    = &ts78xx_rtc_ops,
      },
      .num_resources    = 0,
};

/*
 * TS uses some of the user storage space on the RTC chip so see if it is
 * present; as it's an optional feature at purchase time and not all boards
 * will have it present
 *
 * I've used the method TS use in their rtc7800.c example for the detection
 *
 * TODO: track down a guinea pig without an RTC to see if we can work out a
 *          better RTC detection routine
 */
static int __init ts78xx_rtc_init(void)
{
      unsigned char tmp_rtc0, tmp_rtc1;

      tmp_rtc0 = ts78xx_rtc_readbyte(126);
      tmp_rtc1 = ts78xx_rtc_readbyte(127);

      ts78xx_rtc_writebyte(0x00, 126);
      ts78xx_rtc_writebyte(0x55, 127);
      if (ts78xx_rtc_readbyte(127) == 0x55) {
            ts78xx_rtc_writebyte(0xaa, 127);
            if (ts78xx_rtc_readbyte(127) == 0xaa
                        && ts78xx_rtc_readbyte(126) == 0x00) {
                  ts78xx_rtc_writebyte(tmp_rtc0, 126);
                  ts78xx_rtc_writebyte(tmp_rtc1, 127);
                  platform_device_register(&ts78xx_rtc_device);
                  return 1;
            }
      }

      return 0;
};
#else
static int __init ts78xx_rtc_init(void)
{
      return 0;
}
#endif

/*****************************************************************************
 * SATA
 ****************************************************************************/
static struct mv_sata_platform_data ts78xx_sata_data = {
      .n_ports    = 2,
};

/*****************************************************************************
 * print some information regarding the board
 ****************************************************************************/
static void __init ts78xx_print_board_id(void)
{
      unsigned int board_info;

      board_info = readl(TS78XX_FPGA_REGS_SYSCON_ID);
      printk(KERN_INFO "TS-78xx Info: FPGA rev=%.2x, Board Magic=%.6x, ",
                        board_info & 0xff,
                        (board_info >> 8) & 0xffffff);
      board_info = readl(TS78XX_FPGA_REGS_SYSCON_LCDI);
      printk("JP1=%d, JP2=%d\n",
                        (board_info >> 30) & 0x1,
                        (board_info >> 31) & 0x1);
};

/*****************************************************************************
 * General Setup
 ****************************************************************************/
static struct orion5x_mpp_mode ts78xx_mpp_modes[] __initdata = {
      {  0, MPP_UNUSED },
      {  1, MPP_GPIO },       /* JTAG Clock */
      {  2, MPP_GPIO },       /* JTAG Data In */
      {  3, MPP_GPIO },       /* Lat ECP2 256 FPGA - PB2B */
      {  4, MPP_GPIO },       /* JTAG Data Out */
      {  5, MPP_GPIO },       /* JTAG TMS */
      {  6, MPP_GPIO },       /* Lat ECP2 256 FPGA - PB31A_CLK4+ */
      {  7, MPP_GPIO },       /* Lat ECP2 256 FPGA - PB22B */
      {  8, MPP_UNUSED },
      {  9, MPP_UNUSED },
      { 10, MPP_UNUSED },
      { 11, MPP_UNUSED },
      { 12, MPP_UNUSED },
      { 13, MPP_UNUSED },
      { 14, MPP_UNUSED },
      { 15, MPP_UNUSED },
      { 16, MPP_UART },
      { 17, MPP_UART },
      { 18, MPP_UART },
      { 19, MPP_UART },
      { -1 },
};

static void __init ts78xx_init(void)
{
      /*
       * Setup basic Orion functions. Need to be called early.
       */
      orion5x_init();

      ts78xx_print_board_id();

      orion5x_mpp_conf(ts78xx_mpp_modes);

      /*
       * MPP[20] PCI Clock Out 1
       * MPP[21] PCI Clock Out 0
       * MPP[22] Unused
       * MPP[23] Unused
       * MPP[24] Unused
       * MPP[25] Unused
       */

      /*
       * Configure peripherals.
       */
      orion5x_ehci0_init();
      orion5x_ehci1_init();
      orion5x_eth_init(&ts78xx_eth_data);
      orion5x_sata_init(&ts78xx_sata_data);
      orion5x_uart0_init();
      orion5x_uart1_init();
      orion5x_xor_init();

      orion5x_setup_dev_boot_win(TS78XX_NOR_BOOT_BASE,
                           TS78XX_NOR_BOOT_SIZE);
      platform_device_register(&ts78xx_nor_boot_flash);

      if (!ts78xx_rtc_init())
            printk(KERN_INFO "TS-78xx RTC not detected or enabled\n");
}

MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC")
      /* Maintainer: Alexander Clouter <alex@digriz.org.uk> */
      .phys_io    = ORION5X_REGS_PHYS_BASE,
      .io_pg_offst      = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
      .boot_params      = 0x00000100,
      .init_machine     = ts78xx_init,
      .map_io           = ts78xx_map_io,
      .init_irq   = orion5x_init_irq,
      .timer            = &orion5x_timer,
MACHINE_END

Generated by  Doxygen 1.6.0   Back to index