release/src-rt-6.x/linux/linux-2.6/arch/arm/mach-iop13xx/setup.c

   1 /*
   2  * iop13xx platform Initialization
   3  * Copyright (c) 2005-2006, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16  * Place - Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  */
  19
  20 #include <linux/serial_8250.h>
  21 #ifdef CONFIG_MTD_PHYSMAP
  22 #include <linux/mtd/physmap.h>
  23 #endif
  24 #include <asm/mach/map.h>
  25 #include <asm/hardware.h>
  26 #include <asm/irq.h>
  27 #include <asm/io.h>
  28
  29 #define IOP13XX_UART_XTAL 33334000
  30 #define IOP13XX_SETUP_DEBUG 0
  31 #define PRINTK(x...) ((void)(IOP13XX_SETUP_DEBUG && printk(x)))
  32
  33 /* Standard IO mapping for all IOP13XX based systems
  34  */
  35 static struct map_desc iop13xx_std_desc[] __initdata = {
  36         {    /* mem mapped registers */
  37                 .virtual = IOP13XX_PMMR_VIRT_MEM_BASE,
  38                 .pfn     = __phys_to_pfn(IOP13XX_PMMR_PHYS_MEM_BASE),
  39                 .length  = IOP13XX_PMMR_SIZE,
  40                 .type    = MT_DEVICE,
  41         }, { /* PCIE IO space */
  42                 .virtual = IOP13XX_PCIE_LOWER_IO_VA,
  43                 .pfn     = __phys_to_pfn(IOP13XX_PCIE_LOWER_IO_PA),
  44                 .length  = IOP13XX_PCIX_IO_WINDOW_SIZE,
  45                 .type    = MT_DEVICE,
  46         }, { /* PCIX IO space */
  47                 .virtual = IOP13XX_PCIX_LOWER_IO_VA,
  48                 .pfn     = __phys_to_pfn(IOP13XX_PCIX_LOWER_IO_PA),
  49                 .length  = IOP13XX_PCIX_IO_WINDOW_SIZE,
  50                 .type    = MT_DEVICE,
  51         },
  52 };
  53
  54 static struct resource iop13xx_uart0_resources[] = {
  55         [0] = {
  56                 .start = IOP13XX_UART0_PHYS,
  57                 .end = IOP13XX_UART0_PHYS + 0x3f,
  58                 .flags = IORESOURCE_MEM,
  59         },
  60         [1] = {
  61                 .start = IRQ_IOP13XX_UART0,
  62                 .end = IRQ_IOP13XX_UART0,
  63                 .flags = IORESOURCE_IRQ
  64         }
  65 };
  66
  67 static struct resource iop13xx_uart1_resources[] = {
  68         [0] = {
  69                 .start = IOP13XX_UART1_PHYS,
  70                 .end = IOP13XX_UART1_PHYS + 0x3f,
  71                 .flags = IORESOURCE_MEM,
  72         },
  73         [1] = {
  74                 .start = IRQ_IOP13XX_UART1,
  75                 .end = IRQ_IOP13XX_UART1,
  76                 .flags = IORESOURCE_IRQ
  77         }
  78 };
  79
  80 static struct plat_serial8250_port iop13xx_uart0_data[] = {
  81         {
  82        .membase     = (char*)(IOP13XX_UART0_VIRT),
  83        .mapbase     = (IOP13XX_UART0_PHYS),
  84        .irq         = IRQ_IOP13XX_UART0,
  85        .uartclk     = IOP13XX_UART_XTAL,
  86        .regshift    = 2,
  87        .iotype      = UPIO_MEM,
  88        .flags       = UPF_SKIP_TEST,
  89         },
  90         {  },
  91 };
  92
  93 static struct plat_serial8250_port iop13xx_uart1_data[] = {
  94         {
  95        .membase     = (char*)(IOP13XX_UART1_VIRT),
  96        .mapbase     = (IOP13XX_UART1_PHYS),
  97        .irq         = IRQ_IOP13XX_UART1,
  98        .uartclk     = IOP13XX_UART_XTAL,
  99        .regshift    = 2,
 100        .iotype      = UPIO_MEM,
 101        .flags       = UPF_SKIP_TEST,
 102         },
 103         {  },
 104 };
 105
 106 /* The ids are fixed up later in iop13xx_platform_init */
 107 static struct platform_device iop13xx_uart0 = {
 108        .name = "serial8250",
 109        .id = 0,
 110        .dev.platform_data = iop13xx_uart0_data,
 111        .num_resources = 2,
 112        .resource = iop13xx_uart0_resources,
 113 };
 114
 115 static struct platform_device iop13xx_uart1 = {
 116        .name = "serial8250",
 117        .id = 0,
 118        .dev.platform_data = iop13xx_uart1_data,
 119        .num_resources = 2,
 120        .resource = iop13xx_uart1_resources
 121 };
 122
 123 static struct resource iop13xx_i2c_0_resources[] = {
 124         [0] = {
 125                 .start = IOP13XX_I2C0_PHYS,
 126                 .end = IOP13XX_I2C0_PHYS + 0x18,
 127                 .flags = IORESOURCE_MEM,
 128         },
 129         [1] = {
 130                 .start = IRQ_IOP13XX_I2C_0,
 131                 .end = IRQ_IOP13XX_I2C_0,
 132                 .flags = IORESOURCE_IRQ
 133         }
 134 };
 135
 136 static struct resource iop13xx_i2c_1_resources[] = {
 137         [0] = {
 138                 .start = IOP13XX_I2C1_PHYS,
 139                 .end = IOP13XX_I2C1_PHYS + 0x18,
 140                 .flags = IORESOURCE_MEM,
 141         },
 142         [1] = {
 143                 .start = IRQ_IOP13XX_I2C_1,
 144                 .end = IRQ_IOP13XX_I2C_1,
 145                 .flags = IORESOURCE_IRQ
 146         }
 147 };
 148
 149 static struct resource iop13xx_i2c_2_resources[] = {
 150         [0] = {
 151                 .start = IOP13XX_I2C2_PHYS,
 152                 .end = IOP13XX_I2C2_PHYS + 0x18,
 153                 .flags = IORESOURCE_MEM,
 154         },
 155         [1] = {
 156                 .start = IRQ_IOP13XX_I2C_2,
 157                 .end = IRQ_IOP13XX_I2C_2,
 158                 .flags = IORESOURCE_IRQ
 159         }
 160 };
 161
 162 /* I2C controllers. The IOP13XX uses the same block as the IOP3xx, so
 163  * we just use the same device name.
 164  */
 165
 166 /* The ids are fixed up later in iop13xx_platform_init */
 167 static struct platform_device iop13xx_i2c_0_controller = {
 168         .name = "IOP3xx-I2C",
 169         .id = 0,
 170         .num_resources = 2,
 171         .resource = iop13xx_i2c_0_resources
 172 };
 173
 174 static struct platform_device iop13xx_i2c_1_controller = {
 175         .name = "IOP3xx-I2C",
 176         .id = 0,
 177         .num_resources = 2,
 178         .resource = iop13xx_i2c_1_resources
 179 };
 180
 181 static struct platform_device iop13xx_i2c_2_controller = {
 182         .name = "IOP3xx-I2C",
 183         .id = 0,
 184         .num_resources = 2,
 185         .resource = iop13xx_i2c_2_resources
 186 };
 187
 188 #ifdef CONFIG_MTD_PHYSMAP
 189 /* PBI Flash Device
 190  */
 191 static struct physmap_flash_data iq8134x_flash_data = {
 192         .width = 2,
 193 };
 194
 195 static struct resource iq8134x_flash_resource = {
 196         .start = IQ81340_FLASHBASE,
 197         .end   = 0,
 198         .flags = IORESOURCE_MEM,
 199 };
 200
 201 static struct platform_device iq8134x_flash = {
 202         .name           = "physmap-flash",
 203         .id             = 0,
 204         .dev            = { .platform_data  = &iq8134x_flash_data, },
 205         .num_resources  = 1,
 206         .resource       = &iq8134x_flash_resource,
 207 };
 208
 209 static unsigned long iq8134x_probe_flash_size(void)
 210 {
 211         uint8_t __iomem *flash_addr = ioremap(IQ81340_FLASHBASE, PAGE_SIZE);
 212         int i;
 213         char query[3];
 214         unsigned long size = 0;
 215         int width = iq8134x_flash_data.width;
 216
 217         if (flash_addr) {
 218                 /* send CFI 'query' command */
 219                 writew(0x98, flash_addr);
 220
 221                 /* check for CFI compliance */
 222                 for (i = 0; i < 3 * width; i += width)
 223                         query[i / width] = readb(flash_addr + (0x10 * width) + i);
 224
 225                 /* read the size */
 226                 if (memcmp(query, "QRY", 3) == 0)
 227                         size = 1 << readb(flash_addr + (0x27 * width));
 228
 229                 /* send CFI 'read array' command */
 230                 writew(0xff, flash_addr);
 231
 232                 iounmap(flash_addr);
 233         }
 234
 235         return size;
 236 }
 237 #endif
 238
 239 void __init iop13xx_map_io(void)
 240 {
 241         /* Initialize the Static Page Table maps */
 242         iotable_init(iop13xx_std_desc, ARRAY_SIZE(iop13xx_std_desc));
 243 }
 244
 245 static int init_uart = 0;
 246 static int init_i2c = 0;
 247
 248 void __init iop13xx_platform_init(void)
 249 {
 250         int i;
 251         u32 uart_idx, i2c_idx, plat_idx;
 252         struct platform_device *iop13xx_devices[IQ81340_MAX_PLAT_DEVICES];
 253
 254         /* set the bases so we can read the device id */
 255         iop13xx_set_atu_mmr_bases();
 256
 257         memset(iop13xx_devices, 0, sizeof(iop13xx_devices));
 258
 259         if (init_uart == IOP13XX_INIT_UART_DEFAULT) {
 260                 switch (iop13xx_dev_id()) {
 261                 /* enable both uarts on iop341 */
 262                 case 0x3380:
 263                 case 0x3384:
 264                 case 0x3388:
 265                 case 0x338c:
 266                         init_uart |= IOP13XX_INIT_UART_0;
 267                         init_uart |= IOP13XX_INIT_UART_1;
 268                         break;
 269                 /* only enable uart 1 */
 270                 default:
 271                         init_uart |= IOP13XX_INIT_UART_1;
 272                 }
 273         }
 274
 275         if (init_i2c == IOP13XX_INIT_I2C_DEFAULT) {
 276                 switch (iop13xx_dev_id()) {
 277                 /* enable all i2c units on iop341 and iop342 */
 278                 case 0x3380:
 279                 case 0x3384:
 280                 case 0x3388:
 281                 case 0x338c:
 282                 case 0x3382:
 283                 case 0x3386:
 284                 case 0x338a:
 285                 case 0x338e:
 286                         init_i2c |= IOP13XX_INIT_I2C_0;
 287                         init_i2c |= IOP13XX_INIT_I2C_1;
 288                         init_i2c |= IOP13XX_INIT_I2C_2;
 289                         break;
 290                 /* only enable i2c 1 and 2 */
 291                 default:
 292                         init_i2c |= IOP13XX_INIT_I2C_1;
 293                         init_i2c |= IOP13XX_INIT_I2C_2;
 294                 }
 295         }
 296
 297         plat_idx = 0;
 298         uart_idx = 0;
 299         i2c_idx = 0;
 300
 301         /* uart 1 (if enabled) is ttyS0 */
 302         if (init_uart & IOP13XX_INIT_UART_1) {
 303                 PRINTK("Adding uart1 to platform device list\n");
 304                 iop13xx_uart1.id = uart_idx++;
 305                 iop13xx_devices[plat_idx++] = &iop13xx_uart1;
 306         }
 307         if (init_uart & IOP13XX_INIT_UART_0) {
 308                 PRINTK("Adding uart0 to platform device list\n");
 309                 iop13xx_uart0.id = uart_idx++;
 310                 iop13xx_devices[plat_idx++] = &iop13xx_uart0;
 311         }
 312
 313         for(i = 0; i < IQ81340_NUM_I2C; i++) {
 314                 if ((init_i2c & (1 << i)) && IOP13XX_SETUP_DEBUG)
 315                         printk("Adding i2c%d to platform device list\n", i);
 316                 switch(init_i2c & (1 << i)) {
 317                 case IOP13XX_INIT_I2C_0:
 318                         iop13xx_i2c_0_controller.id = i2c_idx++;
 319                         iop13xx_devices[plat_idx++] =
 320                                 &iop13xx_i2c_0_controller;
 321                         break;
 322                 case IOP13XX_INIT_I2C_1:
 323                         iop13xx_i2c_1_controller.id = i2c_idx++;
 324                         iop13xx_devices[plat_idx++] =
 325                                 &iop13xx_i2c_1_controller;
 326                         break;
 327                 case IOP13XX_INIT_I2C_2:
 328                         iop13xx_i2c_2_controller.id = i2c_idx++;
 329                         iop13xx_devices[plat_idx++] =
 330                                 &iop13xx_i2c_2_controller;
 331                         break;
 332                 }
 333         }
 334
 335 #ifdef CONFIG_MTD_PHYSMAP
 336         iq8134x_flash_resource.end = iq8134x_flash_resource.start +
 337                                 iq8134x_probe_flash_size() - 1;
 338         if (iq8134x_flash_resource.end > iq8134x_flash_resource.start)
 339                 iop13xx_devices[plat_idx++] = &iq8134x_flash;
 340         else
 341                 printk(KERN_ERR "%s: Failed to probe flash size\n", __FUNCTION__);
 342 #endif
 343
 344         platform_add_devices(iop13xx_devices, plat_idx);
 345 }
 346
 347 static int __init iop13xx_init_uart_setup(char *str)
 348 {
 349         if (str) {
 350                 while (*str != '\0') {
 351                         switch(*str) {
 352                         case '0':
 353                                 init_uart |= IOP13XX_INIT_UART_0;
 354                                 break;
 355                         case '1':
 356                                 init_uart |= IOP13XX_INIT_UART_1;
 357                                 break;
 358                         case ',':
 359                         case '=':
 360                                 break;
 361                         default:
 362                                 PRINTK("\"iop13xx_init_uart\" malformed"
 363                                             " at character: \'%c\'", *str);
 364                                 *(str + 1) = '\0';
 365                                 init_uart = IOP13XX_INIT_UART_DEFAULT;
 366                         }
 367                         str++;
 368                 }
 369         }
 370         return 1;
 371 }
 372
 373 static int __init iop13xx_init_i2c_setup(char *str)
 374 {
 375         if (str) {
 376                 while (*str != '\0') {
 377                         switch(*str) {
 378                         case '0':
 379                                 init_i2c |= IOP13XX_INIT_I2C_0;
 380                                 break;
 381                         case '1':
 382                                 init_i2c |= IOP13XX_INIT_I2C_1;
 383                                 break;
 384                         case '2':
 385                                 init_i2c |= IOP13XX_INIT_I2C_2;
 386                                 break;
 387                         case ',':
 388                         case '=':
 389                                 break;
 390                         default:
 391                                 PRINTK("\"iop13xx_init_i2c\" malformed"
 392                                             " at character: \'%c\'", *str);
 393                                 *(str + 1) = '\0';
 394                                 init_i2c = IOP13XX_INIT_I2C_DEFAULT;
 395                         }
 396                         str++;
 397                 }
 398         }
 399         return 1;
 400 }
 401
 402 __setup("iop13xx_init_uart", iop13xx_init_uart_setup);
 403 __setup("iop13xx_init_i2c", iop13xx_init_i2c_setup);