kernel/2.6.29.6-aldebaran-rt/arch/arm/mach-orion5x/ts78xx-setup.c

   1 /*
   2  * arch/arm/mach-orion5x/ts78xx-setup.c
   3  *
   4  * Maintainer: Alexander Clouter <alex@digriz.org.uk>
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/mtd/physmap.h>
  15 #include <linux/mv643xx_eth.h>
  16 #include <linux/ata_platform.h>
  17 #include <linux/m48t86.h>
  18 #include <asm/mach-types.h>
  19 #include <asm/mach/arch.h>
  20 #include <asm/mach/map.h>
  21 #include <mach/orion5x.h>
  22 #include "common.h"
  23 #include "mpp.h"
  24
  25 /*****************************************************************************
  26  * TS-78xx Info
  27  ****************************************************************************/
  28
  29 /*
  30  * FPGA - lives where the PCI bus would be at ORION5X_PCI_MEM_PHYS_BASE
  31  */
  32 #define TS78XX_FPGA_REGS_PHYS_BASE      0xe8000000
  33 #define TS78XX_FPGA_REGS_VIRT_BASE      0xff900000
  34 #define TS78XX_FPGA_REGS_SIZE           SZ_1M
  35
  36 #define TS78XX_FPGA_REGS_SYSCON_ID      (TS78XX_FPGA_REGS_VIRT_BASE | 0x000)
  37 #define TS78XX_FPGA_REGS_SYSCON_LCDI    (TS78XX_FPGA_REGS_VIRT_BASE | 0x004)
  38 #define TS78XX_FPGA_REGS_SYSCON_LCDO    (TS78XX_FPGA_REGS_VIRT_BASE | 0x008)
  39
  40 #define TS78XX_FPGA_REGS_RTC_CTRL       (TS78XX_FPGA_REGS_VIRT_BASE | 0x808)
  41 #define TS78XX_FPGA_REGS_RTC_DATA       (TS78XX_FPGA_REGS_VIRT_BASE | 0x80c)
  42
  43 /*
  44  * 512kB NOR flash Device
  45  */
  46 #define TS78XX_NOR_BOOT_BASE            0xff800000
  47 #define TS78XX_NOR_BOOT_SIZE            SZ_512K
  48
  49 /*****************************************************************************
  50  * I/O Address Mapping
  51  ****************************************************************************/
  52 static struct map_desc ts78xx_io_desc[] __initdata = {
  53         {
  54                 .virtual        = TS78XX_FPGA_REGS_VIRT_BASE,
  55                 .pfn            = __phys_to_pfn(TS78XX_FPGA_REGS_PHYS_BASE),
  56                 .length         = TS78XX_FPGA_REGS_SIZE,
  57                 .type           = MT_DEVICE,
  58         },
  59 };
  60
  61 void __init ts78xx_map_io(void)
  62 {
  63         orion5x_map_io();
  64         iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));
  65 }
  66
  67 /*****************************************************************************
  68  * 512kB NOR Boot Flash - the chip is a M25P40
  69  ****************************************************************************/
  70 static struct mtd_partition ts78xx_nor_boot_flash_resources[] = {
  71         {
  72                 .name           = "ts-bootrom",
  73                 .offset         = 0,
  74                 /* only the first 256kB is used */
  75                 .size           = SZ_256K,
  76                 .mask_flags     = MTD_WRITEABLE,
  77         },
  78 };
  79
  80 static struct physmap_flash_data ts78xx_nor_boot_flash_data = {
  81         .width          = 1,
  82         .parts          = ts78xx_nor_boot_flash_resources,
  83         .nr_parts       = ARRAY_SIZE(ts78xx_nor_boot_flash_resources),
  84 };
  85
  86 static struct resource ts78xx_nor_boot_flash_resource = {
  87         .flags          = IORESOURCE_MEM,
  88         .start          = TS78XX_NOR_BOOT_BASE,
  89         .end            = TS78XX_NOR_BOOT_BASE + TS78XX_NOR_BOOT_SIZE - 1,
  90 };
  91
  92 static struct platform_device ts78xx_nor_boot_flash = {
  93         .name           = "physmap-flash",
  94         .id             = -1,
  95         .dev            = {
  96                 .platform_data  = &ts78xx_nor_boot_flash_data,
  97         },
  98         .num_resources  = 1,
  99         .resource       = &ts78xx_nor_boot_flash_resource,
 100 };
 101
 102 /*****************************************************************************
 103  * Ethernet
 104  ****************************************************************************/
 105 static struct mv643xx_eth_platform_data ts78xx_eth_data = {
 106         .phy_addr       = MV643XX_ETH_PHY_ADDR(0),
 107 };
 108
 109 /*****************************************************************************
 110  * RTC M48T86 - nicked^Wborrowed from arch/arm/mach-ep93xx/ts72xx.c
 111  ****************************************************************************/
 112 #ifdef CONFIG_RTC_DRV_M48T86
 113 static unsigned char ts78xx_rtc_readbyte(unsigned long addr)
 114 {
 115         writeb(addr, TS78XX_FPGA_REGS_RTC_CTRL);
 116         return readb(TS78XX_FPGA_REGS_RTC_DATA);
 117 }
 118
 119 static void ts78xx_rtc_writebyte(unsigned char value, unsigned long addr)
 120 {
 121         writeb(addr, TS78XX_FPGA_REGS_RTC_CTRL);
 122         writeb(value, TS78XX_FPGA_REGS_RTC_DATA);
 123 }
 124
 125 static struct m48t86_ops ts78xx_rtc_ops = {
 126         .readbyte       = ts78xx_rtc_readbyte,
 127         .writebyte      = ts78xx_rtc_writebyte,
 128 };
 129
 130 static struct platform_device ts78xx_rtc_device = {
 131         .name           = "rtc-m48t86",
 132         .id             = -1,
 133         .dev            = {
 134                 .platform_data  = &ts78xx_rtc_ops,
 135         },
 136         .num_resources  = 0,
 137 };
 138
 139 /*
 140  * TS uses some of the user storage space on the RTC chip so see if it is
 141  * present; as it's an optional feature at purchase time and not all boards
 142  * will have it present
 143  *
 144  * I've used the method TS use in their rtc7800.c example for the detection
 145  *
 146  * TODO: track down a guinea pig without an RTC to see if we can work out a
 147  *              better RTC detection routine
 148  */
 149 static int __init ts78xx_rtc_init(void)
 150 {
 151         unsigned char tmp_rtc0, tmp_rtc1;
 152
 153         tmp_rtc0 = ts78xx_rtc_readbyte(126);
 154         tmp_rtc1 = ts78xx_rtc_readbyte(127);
 155
 156         ts78xx_rtc_writebyte(0x00, 126);
 157         ts78xx_rtc_writebyte(0x55, 127);
 158         if (ts78xx_rtc_readbyte(127) == 0x55) {
 159                 ts78xx_rtc_writebyte(0xaa, 127);
 160                 if (ts78xx_rtc_readbyte(127) == 0xaa
 161                                 && ts78xx_rtc_readbyte(126) == 0x00) {
 162                         ts78xx_rtc_writebyte(tmp_rtc0, 126);
 163                         ts78xx_rtc_writebyte(tmp_rtc1, 127);
 164                         platform_device_register(&ts78xx_rtc_device);
 165                         return 1;
 166                 }
 167         }
 168
 169         return 0;
 170 };
 171 #else
 172 static int __init ts78xx_rtc_init(void)
 173 {
 174         return 0;
 175 }
 176 #endif
 177
 178 /*****************************************************************************
 179  * SATA
 180  ****************************************************************************/
 181 static struct mv_sata_platform_data ts78xx_sata_data = {
 182         .n_ports        = 2,
 183 };
 184
 185 /*****************************************************************************
 186  * print some information regarding the board
 187  ****************************************************************************/
 188 static void __init ts78xx_print_board_id(void)
 189 {
 190         unsigned int board_info;
 191
 192         board_info = readl(TS78XX_FPGA_REGS_SYSCON_ID);
 193         printk(KERN_INFO "TS-78xx Info: FPGA rev=%.2x, Board Magic=%.6x, ",
 194                                 board_info & 0xff,
 195                                 (board_info >> 8) & 0xffffff);
 196         board_info = readl(TS78XX_FPGA_REGS_SYSCON_LCDI);
 197         printk("JP1=%d, JP2=%d\n",
 198                                 (board_info >> 30) & 0x1,
 199                                 (board_info >> 31) & 0x1);
 200 };
 201
 202 /*****************************************************************************
 203  * General Setup
 204  ****************************************************************************/
 205 static struct orion5x_mpp_mode ts78xx_mpp_modes[] __initdata = {
 206         {  0, MPP_UNUSED },
 207         {  1, MPP_GPIO },               /* JTAG Clock */
 208         {  2, MPP_GPIO },               /* JTAG Data In */
 209         {  3, MPP_GPIO },               /* Lat ECP2 256 FPGA - PB2B */
 210         {  4, MPP_GPIO },               /* JTAG Data Out */
 211         {  5, MPP_GPIO },               /* JTAG TMS */
 212         {  6, MPP_GPIO },               /* Lat ECP2 256 FPGA - PB31A_CLK4+ */
 213         {  7, MPP_GPIO },               /* Lat ECP2 256 FPGA - PB22B */
 214         {  8, MPP_UNUSED },
 215         {  9, MPP_UNUSED },
 216         { 10, MPP_UNUSED },
 217         { 11, MPP_UNUSED },
 218         { 12, MPP_UNUSED },
 219         { 13, MPP_UNUSED },
 220         { 14, MPP_UNUSED },
 221         { 15, MPP_UNUSED },
 222         { 16, MPP_UART },
 223         { 17, MPP_UART },
 224         { 18, MPP_UART },
 225         { 19, MPP_UART },
 226         { -1 },
 227 };
 228
 229 static void __init ts78xx_init(void)
 230 {
 231         /*
 232          * Setup basic Orion functions. Need to be called early.
 233          */
 234         orion5x_init();
 235
 236         ts78xx_print_board_id();
 237
 238         orion5x_mpp_conf(ts78xx_mpp_modes);
 239
 240         /*
 241          * MPP[20] PCI Clock Out 1
 242          * MPP[21] PCI Clock Out 0
 243          * MPP[22] Unused
 244          * MPP[23] Unused
 245          * MPP[24] Unused
 246          * MPP[25] Unused
 247          */
 248
 249         /*
 250          * Configure peripherals.
 251          */
 252         orion5x_ehci0_init();
 253         orion5x_ehci1_init();
 254         orion5x_eth_init(&ts78xx_eth_data);
 255         orion5x_sata_init(&ts78xx_sata_data);
 256         orion5x_uart0_init();
 257         orion5x_uart1_init();
 258         orion5x_xor_init();
 259
 260         orion5x_setup_dev_boot_win(TS78XX_NOR_BOOT_BASE,
 261                                    TS78XX_NOR_BOOT_SIZE);
 262         platform_device_register(&ts78xx_nor_boot_flash);
 263
 264         if (!ts78xx_rtc_init())
 265                 printk(KERN_INFO "TS-78xx RTC not detected or enabled\n");
 266 }
 267
 268 MACHINE_START(TS78XX, "Technologic Systems TS-78xx SBC")
 269         /* Maintainer: Alexander Clouter <alex@digriz.org.uk> */
 270         .phys_io        = ORION5X_REGS_PHYS_BASE,
 271         .io_pg_offst    = ((ORION5X_REGS_VIRT_BASE) >> 18) & 0xFFFC,
 272         .boot_params    = 0x00000100,
 273         .init_machine   = ts78xx_init,
 274         .map_io         = ts78xx_map_io,
 275         .init_irq       = orion5x_init_irq,
 276         .timer          = &orion5x_timer,
 277 MACHINE_END