arch/arm/mach-sa1100/simpad.c

   1 /*
   2  * linux/arch/arm/mach-sa1100/simpad.c
   3  */
   4
   5 #include <linux/module.h>
   6 #include <linux/init.h>
   7 #include <linux/kernel.h>
   8 #include <linux/tty.h>
   9 #include <linux/proc_fs.h>
  10 #include <linux/string.h>
  11 #include <linux/pm.h>
  12 #include <linux/platform_data/sa11x0-serial.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/mfd/ucb1x00.h>
  15 #include <linux/mtd/mtd.h>
  16 #include <linux/mtd/partitions.h>
  17 #include <linux/io.h>
  18 #include <linux/gpio.h>
  19
  20 #include <mach/hardware.h>
  21 #include <asm/setup.h>
  22
  23 #include <asm/mach-types.h>
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/flash.h>
  26 #include <asm/mach/map.h>
  27 #include <linux/platform_data/mfd-mcp-sa11x0.h>
  28 #include <mach/simpad.h>
  29 #include <mach/irqs.h>
  30
  31 #include <linux/serial_core.h>
  32 #include <linux/ioport.h>
  33 #include <linux/input.h>
  34 #include <linux/gpio_keys.h>
  35 #include <linux/leds.h>
  36 #include <linux/i2c-gpio.h>
  37
  38 #include "generic.h"
  39
  40 /*
  41  * CS3 support
  42  */
  43
  44 static long cs3_shadow;
  45 static spinlock_t cs3_lock;
  46 static struct gpio_chip cs3_gpio;
  47
  48 long simpad_get_cs3_ro(void)
  49 {
  50         return readl(CS3_BASE);
  51 }
  52 EXPORT_SYMBOL(simpad_get_cs3_ro);
  53
  54 long simpad_get_cs3_shadow(void)
  55 {
  56         return cs3_shadow;
  57 }
  58 EXPORT_SYMBOL(simpad_get_cs3_shadow);
  59
  60 static void __simpad_write_cs3(void)
  61 {
  62         writel(cs3_shadow, CS3_BASE);
  63 }
  64
  65 void simpad_set_cs3_bit(int value)
  66 {
  67         unsigned long flags;
  68
  69         spin_lock_irqsave(&cs3_lock, flags);
  70         cs3_shadow |= value;
  71         __simpad_write_cs3();
  72         spin_unlock_irqrestore(&cs3_lock, flags);
  73 }
  74 EXPORT_SYMBOL(simpad_set_cs3_bit);
  75
  76 void simpad_clear_cs3_bit(int value)
  77 {
  78         unsigned long flags;
  79
  80         spin_lock_irqsave(&cs3_lock, flags);
  81         cs3_shadow &= ~value;
  82         __simpad_write_cs3();
  83         spin_unlock_irqrestore(&cs3_lock, flags);
  84 }
  85 EXPORT_SYMBOL(simpad_clear_cs3_bit);
  86
  87 static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
  88 {
  89         if (offset > 15)
  90                 return;
  91         if (value)
  92                 simpad_set_cs3_bit(1 << offset);
  93         else
  94                 simpad_clear_cs3_bit(1 << offset);
  95 };
  96
  97 static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
  98 {
  99         if (offset > 15)
 100                 return simpad_get_cs3_ro() & (1 << (offset - 16));
 101         return simpad_get_cs3_shadow() & (1 << offset);
 102 };
 103
 104 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 105 {
 106         if (offset > 15)
 107                 return 0;
 108         return -EINVAL;
 109 };
 110
 111 static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 112         int value)
 113 {
 114         if (offset > 15)
 115                 return -EINVAL;
 116         cs3_gpio_set(chip, offset, value);
 117         return 0;
 118 };
 119
 120 static struct map_desc simpad_io_desc[] __initdata = {
 121         {       /* MQ200 */
 122                 .virtual        =  0xf2800000,
 123                 .pfn            = __phys_to_pfn(0x4b800000),
 124                 .length         = 0x00800000,
 125                 .type           = MT_DEVICE
 126         }, {    /* Simpad CS3 */
 127                 .virtual        = (unsigned long)CS3_BASE,
 128                 .pfn            = __phys_to_pfn(SA1100_CS3_PHYS),
 129                 .length         = 0x00100000,
 130                 .type           = MT_DEVICE
 131         },
 132 };
 133
 134
 135 static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 136 {
 137         if (port->mapbase == (u_int)&Ser1UTCR0) {
 138                 if (state)
 139                 {
 140                         simpad_clear_cs3_bit(RS232_ON);
 141                         simpad_clear_cs3_bit(DECT_POWER_ON);
 142                 }else
 143                 {
 144                         simpad_set_cs3_bit(RS232_ON);
 145                         simpad_set_cs3_bit(DECT_POWER_ON);
 146                 }
 147         }
 148 }
 149
 150 static struct sa1100_port_fns simpad_port_fns __initdata = {
 151         .pm        = simpad_uart_pm,
 152 };
 153
 154
 155 static struct mtd_partition simpad_partitions[] = {
 156         {
 157                 .name       = "SIMpad boot firmware",
 158                 .size       = 0x00080000,
 159                 .offset     = 0,
 160                 .mask_flags = MTD_WRITEABLE,
 161         }, {
 162                 .name       = "SIMpad kernel",
 163                 .size       = 0x0010000,
 164                 .offset     = MTDPART_OFS_APPEND,
 165         }, {
 166                 .name       = "SIMpad root jffs2",
 167                 .size       = MTDPART_SIZ_FULL,
 168                 .offset     = MTDPART_OFS_APPEND,
 169         }
 170 };
 171
 172 static struct flash_platform_data simpad_flash_data = {
 173         .map_name    = "cfi_probe",
 174         .parts       = simpad_partitions,
 175         .nr_parts    = ARRAY_SIZE(simpad_partitions),
 176 };
 177
 178
 179 static struct resource simpad_flash_resources [] = {
 180         DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
 181         DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
 182 };
 183
 184 static struct ucb1x00_plat_data simpad_ucb1x00_data = {
 185         .gpio_base      = SIMPAD_UCB1X00_GPIO_BASE,
 186 };
 187
 188 static struct mcp_plat_data simpad_mcp_data = {
 189         .mccr0          = MCCR0_ADM,
 190         .sclk_rate      = 11981000,
 191         .codec_pdata    = &simpad_ucb1x00_data,
 192 };
 193
 194
 195
 196 static void __init simpad_map_io(void)
 197 {
 198         sa1100_map_io();
 199
 200         iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
 201
 202         /* Initialize CS3 */
 203         cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
 204                 RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
 205         __simpad_write_cs3(); /* Spinlocks not yet initialized */
 206
 207         sa1100_register_uart_fns(&simpad_port_fns);
 208         sa1100_register_uart(0, 3);  /* serial interface */
 209         sa1100_register_uart(1, 1);  /* DECT             */
 210
 211         // Reassign UART 1 pins
 212         GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
 213         GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
 214         GPDR &= ~GPIO_UART_RXD;
 215         PPAR |= PPAR_UPR;
 216
 217         /*
 218          * Set up registers for sleep mode.
 219          */
 220
 221
 222         PWER = PWER_GPIO0| PWER_RTC;
 223         PGSR = 0x818;
 224         PCFR = 0;
 225         PSDR = 0;
 226
 227 }
 228
 229 static void simpad_power_off(void)
 230 {
 231         local_irq_disable();
 232         cs3_shadow = SD_MEDIAQ;
 233         __simpad_write_cs3(); /* Bypass spinlock here */
 234
 235         /* disable internal oscillator, float CS lines */
 236         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
 237         /* enable wake-up on GPIO0 */
 238         PWER = GFER = GRER = PWER_GPIO0;
 239         /*
 240          * set scratchpad to zero, just in case it is used as a
 241          * restart address by the bootloader.
 242          */
 243         PSPR = 0;
 244         PGSR = 0;
 245         /* enter sleep mode */
 246         PMCR = PMCR_SF;
 247         while(1);
 248
 249         local_irq_enable(); /* we won't ever call it */
 250
 251
 252 }
 253
 254 /*
 255  * gpio_keys
 256 */
 257
 258 static struct gpio_keys_button simpad_button_table[] = {
 259         { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
 260 };
 261
 262 static struct gpio_keys_platform_data simpad_keys_data = {
 263         .buttons = simpad_button_table,
 264         .nbuttons = ARRAY_SIZE(simpad_button_table),
 265 };
 266
 267 static struct platform_device simpad_keys = {
 268         .name = "gpio-keys",
 269         .dev = {
 270                 .platform_data = &simpad_keys_data,
 271         },
 272 };
 273
 274 static struct gpio_keys_button simpad_polled_button_table[] = {
 275         { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
 276         { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
 277         { KEY_UP,    SIMPAD_UCB1X00_GPIO_UP,    1, "up button" },
 278         { KEY_DOWN,  SIMPAD_UCB1X00_GPIO_DOWN,  1, "down button" },
 279         { KEY_LEFT,  SIMPAD_UCB1X00_GPIO_LEFT,  1, "left button" },
 280         { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
 281 };
 282
 283 static struct gpio_keys_platform_data simpad_polled_keys_data = {
 284         .buttons = simpad_polled_button_table,
 285         .nbuttons = ARRAY_SIZE(simpad_polled_button_table),
 286         .poll_interval = 50,
 287 };
 288
 289 static struct platform_device simpad_polled_keys = {
 290         .name = "gpio-keys-polled",
 291         .dev = {
 292                 .platform_data = &simpad_polled_keys_data,
 293         },
 294 };
 295
 296 /*
 297  * GPIO LEDs
 298  */
 299
 300 static struct gpio_led simpad_leds[] = {
 301         {
 302                 .name = "simpad:power",
 303                 .gpio = SIMPAD_CS3_LED2_ON,
 304                 .active_low = 0,
 305                 .default_trigger = "default-on",
 306         },
 307 };
 308
 309 static struct gpio_led_platform_data simpad_led_data = {
 310         .num_leds = ARRAY_SIZE(simpad_leds),
 311         .leds = simpad_leds,
 312 };
 313
 314 static struct platform_device simpad_gpio_leds = {
 315         .name = "leds-gpio",
 316         .id = 0,
 317         .dev = {
 318                 .platform_data = &simpad_led_data,
 319         },
 320 };
 321
 322 /*
 323  * i2c
 324  */
 325 static struct i2c_gpio_platform_data simpad_i2c_data = {
 326         .sda_pin = GPIO_GPIO21,
 327         .scl_pin = GPIO_GPIO25,
 328         .udelay = 10,
 329         .timeout = HZ,
 330 };
 331
 332 static struct platform_device simpad_i2c = {
 333         .name = "i2c-gpio",
 334         .id = 0,
 335         .dev = {
 336                 .platform_data = &simpad_i2c_data,
 337         },
 338 };
 339
 340 /*
 341  * MediaQ Video Device
 342  */
 343 static struct platform_device simpad_mq200fb = {
 344         .name = "simpad-mq200",
 345         .id   = 0,
 346 };
 347
 348 static struct platform_device *devices[] __initdata = {
 349         &simpad_keys,
 350         &simpad_polled_keys,
 351         &simpad_mq200fb,
 352         &simpad_gpio_leds,
 353         &simpad_i2c,
 354 };
 355
 356
 357
 358 static int __init simpad_init(void)
 359 {
 360         int ret;
 361
 362         spin_lock_init(&cs3_lock);
 363
 364         cs3_gpio.label = "simpad_cs3";
 365         cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
 366         cs3_gpio.ngpio = 24;
 367         cs3_gpio.set = cs3_gpio_set;
 368         cs3_gpio.get = cs3_gpio_get;
 369         cs3_gpio.direction_input = cs3_gpio_direction_input;
 370         cs3_gpio.direction_output = cs3_gpio_direction_output;
 371         ret = gpiochip_add(&cs3_gpio);
 372         if (ret)
 373                 printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
 374
 375         pm_power_off = simpad_power_off;
 376
 377         sa11x0_ppc_configure_mcp();
 378         sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
 379                               ARRAY_SIZE(simpad_flash_resources));
 380         sa11x0_register_mcp(&simpad_mcp_data);
 381
 382         ret = platform_add_devices(devices, ARRAY_SIZE(devices));
 383         if(ret)
 384                 printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
 385
 386         return 0;
 387 }
 388
 389 arch_initcall(simpad_init);
 390
 391
 392 MACHINE_START(SIMPAD, "Simpad")
 393         /* Maintainer: Holger Freyther */
 394         .atag_offset    = 0x100,
 395         .map_io         = simpad_map_io,
 396         .nr_irqs        = SA1100_NR_IRQS,
 397         .init_irq       = sa1100_init_irq,
 398         .init_late      = sa11x0_init_late,
 399         .init_time      = sa1100_timer_init,
 400         .restart        = sa11x0_restart,
 401 MACHINE_END