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