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
  28 #define IOP13XX_UART_XTAL 33334000
  29 #define IOP13XX_SETUP_DEBUG 0
  30 #define PRINTK(x...) ((void)(IOP13XX_SETUP_DEBUG && printk(x)))
  31
  32 /* Standard IO mapping for all IOP13XX based systems
  33  */
  34 static struct map_desc iop13xx_std_desc[] __initdata = {
  35         {    /* mem mapped registers */
  36                 .virtual = IOP13XX_PMMR_VIRT_MEM_BASE,
  37                 .pfn     = __phys_to_pfn(IOP13XX_PMMR_PHYS_MEM_BASE),
  38                 .length  = IOP13XX_PMMR_SIZE,
  39                 .type    = MT_DEVICE,
  40         }, { /* PCIE IO space */
  41                 .virtual = IOP13XX_PCIE_LOWER_IO_VA,
  42                 .pfn     = __phys_to_pfn(IOP13XX_PCIE_LOWER_IO_PA),
  43                 .length  = IOP13XX_PCIX_IO_WINDOW_SIZE,
  44                 .type    = MT_DEVICE,
  45         }, { /* PCIX IO space */
  46                 .virtual = IOP13XX_PCIX_LOWER_IO_VA,
  47                 .pfn     = __phys_to_pfn(IOP13XX_PCIX_LOWER_IO_PA),
  48                 .length  = IOP13XX_PCIX_IO_WINDOW_SIZE,
  49                 .type    = MT_DEVICE,
  50         },
  51 };
  52
  53 static struct resource iop13xx_uart0_resources[] = {
  54         [0] = {
  55                 .start = IOP13XX_UART0_PHYS,
  56                 .end = IOP13XX_UART0_PHYS + 0x3f,
  57                 .flags = IORESOURCE_MEM,
  58         },
  59         [1] = {
  60                 .start = IRQ_IOP13XX_UART0,
  61                 .end = IRQ_IOP13XX_UART0,
  62                 .flags = IORESOURCE_IRQ
  63         }
  64 };
  65
  66 static struct resource iop13xx_uart1_resources[] = {
  67         [0] = {
  68                 .start = IOP13XX_UART1_PHYS,
  69                 .end = IOP13XX_UART1_PHYS + 0x3f,
  70                 .flags = IORESOURCE_MEM,
  71         },
  72         [1] = {
  73                 .start = IRQ_IOP13XX_UART1,
  74                 .end = IRQ_IOP13XX_UART1,
  75                 .flags = IORESOURCE_IRQ
  76         }
  77 };
  78
  79 static struct plat_serial8250_port iop13xx_uart0_data[] = {
  80         {
  81        .membase     = (char*)(IOP13XX_UART0_VIRT),
  82        .mapbase     = (IOP13XX_UART0_PHYS),
  83        .irq         = IRQ_IOP13XX_UART0,
  84        .uartclk     = IOP13XX_UART_XTAL,
  85        .regshift    = 2,
  86        .iotype      = UPIO_MEM,
  87        .flags       = UPF_SKIP_TEST,
  88         },
  89         {  },
  90 };
  91
  92 static struct plat_serial8250_port iop13xx_uart1_data[] = {
  93         {
  94        .membase     = (char*)(IOP13XX_UART1_VIRT),
  95        .mapbase     = (IOP13XX_UART1_PHYS),
  96        .irq         = IRQ_IOP13XX_UART1,
  97        .uartclk     = IOP13XX_UART_XTAL,
  98        .regshift    = 2,
  99        .iotype      = UPIO_MEM,
 100        .flags       = UPF_SKIP_TEST,
 101         },
 102         {  },
 103 };
 104
 105 /* The ids are fixed up later in iop13xx_platform_init */
 106 static struct platform_device iop13xx_uart0 = {
 107        .name = "serial8250",
 108        .id = 0,
 109        .dev.platform_data = iop13xx_uart0_data,
 110        .num_resources = 2,
 111        .resource = iop13xx_uart0_resources,
 112 };
 113
 114 static struct platform_device iop13xx_uart1 = {
 115        .name = "serial8250",
 116        .id = 0,
 117        .dev.platform_data = iop13xx_uart1_data,
 118        .num_resources = 2,
 119        .resource = iop13xx_uart1_resources
 120 };
 121
 122 static struct resource iop13xx_i2c_0_resources[] = {
 123         [0] = {
 124                 .start = IOP13XX_I2C0_PHYS,
 125                 .end = IOP13XX_I2C0_PHYS + 0x18,
 126                 .flags = IORESOURCE_MEM,
 127         },
 128         [1] = {
 129                 .start = IRQ_IOP13XX_I2C_0,
 130                 .end = IRQ_IOP13XX_I2C_0,
 131                 .flags = IORESOURCE_IRQ
 132         }
 133 };
 134
 135 static struct resource iop13xx_i2c_1_resources[] = {
 136         [0] = {
 137                 .start = IOP13XX_I2C1_PHYS,
 138                 .end = IOP13XX_I2C1_PHYS + 0x18,
 139                 .flags = IORESOURCE_MEM,
 140         },
 141         [1] = {
 142                 .start = IRQ_IOP13XX_I2C_1,
 143                 .end = IRQ_IOP13XX_I2C_1,
 144                 .flags = IORESOURCE_IRQ
 145         }
 146 };
 147
 148 static struct resource iop13xx_i2c_2_resources[] = {
 149         [0] = {
 150                 .start = IOP13XX_I2C2_PHYS,
 151                 .end = IOP13XX_I2C2_PHYS + 0x18,
 152                 .flags = IORESOURCE_MEM,
 153         },
 154         [1] = {
 155                 .start = IRQ_IOP13XX_I2C_2,
 156                 .end = IRQ_IOP13XX_I2C_2,
 157                 .flags = IORESOURCE_IRQ
 158         }
 159 };
 160
 161 /* I2C controllers. The IOP13XX uses the same block as the IOP3xx, so
 162  * we just use the same device name.
 163  */
 164
 165 /* The ids are fixed up later in iop13xx_platform_init */
 166 static struct platform_device iop13xx_i2c_0_controller = {
 167         .name = "IOP3xx-I2C",
 168         .id = 0,
 169         .num_resources = 2,
 170         .resource = iop13xx_i2c_0_resources
 171 };
 172
 173 static struct platform_device iop13xx_i2c_1_controller = {
 174         .name = "IOP3xx-I2C",
 175         .id = 0,
 176         .num_resources = 2,
 177         .resource = iop13xx_i2c_1_resources
 178 };
 179
 180 static struct platform_device iop13xx_i2c_2_controller = {
 181         .name = "IOP3xx-I2C",
 182         .id = 0,
 183         .num_resources = 2,
 184         .resource = iop13xx_i2c_2_resources
 185 };
 186
 187 #ifdef CONFIG_MTD_PHYSMAP
 188 /* PBI Flash Device
 189  */
 190 static struct physmap_flash_data iq8134x_flash_data = {
 191         .width = 2,
 192 };
 193
 194 static struct resource iq8134x_flash_resource = {
 195         .start = IQ81340_FLASHBASE,
 196         .end   = 0,
 197         .flags = IORESOURCE_MEM,
 198 };
 199
 200 static struct platform_device iq8134x_flash = {
 201         .name           = "physmap-flash",
 202         .id             = 0,
 203         .dev            = { .platform_data  = &iq8134x_flash_data, },
 204         .num_resources  = 1,
 205         .resource       = &iq8134x_flash_resource,
 206 };
 207
 208 static unsigned long iq8134x_probe_flash_size(void)
 209 {
 210         uint8_t __iomem *flash_addr = ioremap(IQ81340_FLASHBASE, PAGE_SIZE);
 211         int i;
 212         char query[3];
 213         unsigned long size = 0;
 214         int width = iq8134x_flash_data.width;
 215
 216         if (flash_addr) {
 217                 /* send CFI 'query' command */
 218                 writew(0x98, flash_addr);
 219
 220                 /* check for CFI compliance */
 221                 for (i = 0; i < 3 * width; i += width)
 222                         query[i / width] = readb(flash_addr + (0x10 * width) + i);
 223
 224                 /* read the size */
 225                 if (memcmp(query, "QRY", 3) == 0)
 226                         size = 1 << readb(flash_addr + (0x27 * width));
 227
 228                 /* send CFI 'read array' command */
 229                 writew(0xff, flash_addr);
 230
 231                 iounmap(flash_addr);
 232         }
 233
 234         return size;
 235 }
 236 #endif
 237
 238 void __init iop13xx_map_io(void)
 239 {
 240         /* Initialize the Static Page Table maps */
 241         iotable_init(iop13xx_std_desc, ARRAY_SIZE(iop13xx_std_desc));
 242 }
 243
 244 static int init_uart = 0;
 245 static int init_i2c = 0;
 246
 247 void __init iop13xx_platform_init(void)
 248 {
 249         int i;
 250         u32 uart_idx, i2c_idx, plat_idx;
 251         struct platform_device *iop13xx_devices[IQ81340_MAX_PLAT_DEVICES];
 252
 253         /* set the bases so we can read the device id */
 254         iop13xx_set_atu_mmr_bases();
 255
 256         memset(iop13xx_devices, 0, sizeof(iop13xx_devices));
 257
 258         if (init_uart == IOP13XX_INIT_UART_DEFAULT) {
 259                 switch (iop13xx_dev_id()) {
 260                 /* enable both uarts on iop341 and iop342 */
 261                 case 0x3380:
 262                 case 0x3384:
 263                 case 0x3388:
 264                 case 0x338c:
 265                 case 0x3382:
 266                 case 0x3386:
 267                 case 0x338a:
 268                 case 0x338e:
 269                         init_uart |= IOP13XX_INIT_UART_0;
 270                         init_uart |= IOP13XX_INIT_UART_1;
 271                         break;
 272                 /* only enable uart 1 */
 273                 default:
 274                         init_uart |= IOP13XX_INIT_UART_1;
 275                 }
 276         }
 277
 278         if (init_i2c == IOP13XX_INIT_I2C_DEFAULT) {
 279                 switch (iop13xx_dev_id()) {
 280                 /* enable all i2c units on iop341 and iop342 */
 281                 case 0x3380:
 282                 case 0x3384:
 283                 case 0x3388:
 284                 case 0x338c:
 285                 case 0x3382:
 286                 case 0x3386:
 287                 case 0x338a:
 288                 case 0x338e:
 289                         init_i2c |= IOP13XX_INIT_I2C_0;
 290                         init_i2c |= IOP13XX_INIT_I2C_1;
 291                         init_i2c |= IOP13XX_INIT_I2C_2;
 292                         break;
 293                 /* only enable i2c 1 and 2 */
 294                 default:
 295                         init_i2c |= IOP13XX_INIT_I2C_1;
 296                         init_i2c |= IOP13XX_INIT_I2C_2;
 297                 }
 298         }
 299
 300         plat_idx = 0;
 301         uart_idx = 0;
 302         i2c_idx = 0;
 303
 304         /* uart 1 (if enabled) is ttyS0 */
 305         if (init_uart & IOP13XX_INIT_UART_1) {
 306                 PRINTK("Adding uart1 to platform device list\n");
 307                 iop13xx_uart1.id = uart_idx++;
 308                 iop13xx_devices[plat_idx++] = &iop13xx_uart1;
 309         }
 310         if (init_uart & IOP13XX_INIT_UART_0) {
 311                 PRINTK("Adding uart0 to platform device list\n");
 312                 iop13xx_uart0.id = uart_idx++;
 313                 iop13xx_devices[plat_idx++] = &iop13xx_uart0;
 314         }
 315
 316         for(i = 0; i < IQ81340_NUM_I2C; i++) {
 317                 if ((init_i2c & (1 << i)) && IOP13XX_SETUP_DEBUG)
 318                         printk("Adding i2c%d to platform device list\n", i);
 319                 switch(init_i2c & (1 << i)) {
 320                 case IOP13XX_INIT_I2C_0:
 321                         iop13xx_i2c_0_controller.id = i2c_idx++;
 322                         iop13xx_devices[plat_idx++] =
 323                                 &iop13xx_i2c_0_controller;
 324                         break;
 325                 case IOP13XX_INIT_I2C_1:
 326                         iop13xx_i2c_1_controller.id = i2c_idx++;
 327                         iop13xx_devices[plat_idx++] =
 328                                 &iop13xx_i2c_1_controller;
 329                         break;
 330                 case IOP13XX_INIT_I2C_2:
 331                         iop13xx_i2c_2_controller.id = i2c_idx++;
 332                         iop13xx_devices[plat_idx++] =
 333                                 &iop13xx_i2c_2_controller;
 334                         break;
 335                 }
 336         }
 337
 338 #ifdef CONFIG_MTD_PHYSMAP
 339         iq8134x_flash_resource.end = iq8134x_flash_resource.start +
 340                                 iq8134x_probe_flash_size() - 1;
 341         if (iq8134x_flash_resource.end > iq8134x_flash_resource.start)
 342                 iop13xx_devices[plat_idx++] = &iq8134x_flash;
 343         else
 344                 printk(KERN_ERR "%s: Failed to probe flash size\n", __FUNCTION__);
 345 #endif
 346
 347         platform_add_devices(iop13xx_devices, plat_idx);
 348 }
 349
 350 static int __init iop13xx_init_uart_setup(char *str)
 351 {
 352         if (str) {
 353                 while (*str != '\0') {
 354                         switch(*str) {
 355                         case '0':
 356                                 init_uart |= IOP13XX_INIT_UART_0;
 357                                 break;
 358                         case '1':
 359                                 init_uart |= IOP13XX_INIT_UART_1;
 360                                 break;
 361                         case ',':
 362                         case '=':
 363                                 break;
 364                         default:
 365                                 PRINTK("\"iop13xx_init_uart\" malformed"
 366                                             " at character: \'%c\'", *str);
 367                                 *(str + 1) = '\0';
 368                                 init_uart = IOP13XX_INIT_UART_DEFAULT;
 369                         }
 370                         str++;
 371                 }
 372         }
 373         return 1;
 374 }
 375
 376 static int __init iop13xx_init_i2c_setup(char *str)
 377 {
 378         if (str) {
 379                 while (*str != '\0') {
 380                         switch(*str) {
 381                         case '0':
 382                                 init_i2c |= IOP13XX_INIT_I2C_0;
 383                                 break;
 384                         case '1':
 385                                 init_i2c |= IOP13XX_INIT_I2C_1;
 386                                 break;
 387                         case '2':
 388                                 init_i2c |= IOP13XX_INIT_I2C_2;
 389                                 break;
 390                         case ',':
 391                         case '=':
 392                                 break;
 393                         default:
 394                                 PRINTK("\"iop13xx_init_i2c\" malformed"
 395                                             " at character: \'%c\'", *str);
 396                                 *(str + 1) = '\0';
 397                                 init_i2c = IOP13XX_INIT_I2C_DEFAULT;
 398                         }
 399                         str++;
 400                 }
 401         }
 402         return 1;
 403 }
 404
 405 __setup("iop13xx_init_uart", iop13xx_init_uart_setup);
 406 __setup("iop13xx_init_i2c", iop13xx_init_i2c_setup);