arch/arm/mach-sa1100/simpad.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * linux/arch/arm/mach-sa1100/simpad.c
   4  */
   5
   6 #include <linux/module.h>
   7 #include <linux/gpio/machine.h>
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/tty.h>
  11 #include <linux/proc_fs.h>
  12 #include <linux/string.h>
  13 #include <linux/pm.h>
  14 #include <linux/platform_data/sa11x0-serial.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/mfd/ucb1x00.h>
  17 #include <linux/mtd/mtd.h>
  18 #include <linux/mtd/partitions.h>
  19 #include <linux/io.h>
  20 #include <linux/gpio/driver.h>
  21 #include <linux/gpio/machine.h>
  22
  23 #include <mach/hardware.h>
  24 #include <asm/setup.h>
  25 #include <asm/irq.h>
  26
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/flash.h>
  30 #include <asm/mach/map.h>
  31 #include <linux/platform_data/mfd-mcp-sa11x0.h>
  32 #include <mach/simpad.h>
  33 #include <mach/irqs.h>
  34
  35 #include <linux/serial_core.h>
  36 #include <linux/ioport.h>
  37 #include <linux/input.h>
  38 #include <linux/gpio_keys.h>
  39 #include <linux/leds.h>
  40 #include <linux/platform_data/i2c-gpio.h>
  41
  42 #include "generic.h"
  43
  44 /*
  45  * CS3 support
  46  */
  47
  48 static long cs3_shadow;
  49 static spinlock_t cs3_lock;
  50 static struct gpio_chip cs3_gpio;
  51
  52 long simpad_get_cs3_ro(void)
  53 {
  54         return readl(CS3_BASE);
  55 }
  56 EXPORT_SYMBOL(simpad_get_cs3_ro);
  57
  58 long simpad_get_cs3_shadow(void)
  59 {
  60         return cs3_shadow;
  61 }
  62 EXPORT_SYMBOL(simpad_get_cs3_shadow);
  63
  64 static void __simpad_write_cs3(void)
  65 {
  66         writel(cs3_shadow, CS3_BASE);
  67 }
  68
  69 void simpad_set_cs3_bit(int value)
  70 {
  71         unsigned long flags;
  72
  73         spin_lock_irqsave(&cs3_lock, flags);
  74         cs3_shadow |= value;
  75         __simpad_write_cs3();
  76         spin_unlock_irqrestore(&cs3_lock, flags);
  77 }
  78 EXPORT_SYMBOL(simpad_set_cs3_bit);
  79
  80 void simpad_clear_cs3_bit(int value)
  81 {
  82         unsigned long flags;
  83
  84         spin_lock_irqsave(&cs3_lock, flags);
  85         cs3_shadow &= ~value;
  86         __simpad_write_cs3();
  87         spin_unlock_irqrestore(&cs3_lock, flags);
  88 }
  89 EXPORT_SYMBOL(simpad_clear_cs3_bit);
  90
  91 static void cs3_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
  92 {
  93         if (offset > 15)
  94                 return;
  95         if (value)
  96                 simpad_set_cs3_bit(1 << offset);
  97         else
  98                 simpad_clear_cs3_bit(1 << offset);
  99 };
 100
 101 static int cs3_gpio_get(struct gpio_chip *chip, unsigned offset)
 102 {
 103         if (offset > 15)
 104                 return !!(simpad_get_cs3_ro() & (1 << (offset - 16)));
 105         return !!(simpad_get_cs3_shadow() & (1 << offset));
 106 };
 107
 108 static int cs3_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 109 {
 110         if (offset > 15)
 111                 return 0;
 112         return -EINVAL;
 113 };
 114
 115 static int cs3_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 116         int value)
 117 {
 118         if (offset > 15)
 119                 return -EINVAL;
 120         cs3_gpio_set(chip, offset, value);
 121         return 0;
 122 };
 123
 124 static struct map_desc simpad_io_desc[] __initdata = {
 125         {       /* MQ200 */
 126                 .virtual        =  0xf2800000,
 127                 .pfn            = __phys_to_pfn(0x4b800000),
 128                 .length         = 0x00800000,
 129                 .type           = MT_DEVICE
 130         }, {    /* Simpad CS3 */
 131                 .virtual        = (unsigned long)CS3_BASE,
 132                 .pfn            = __phys_to_pfn(SA1100_CS3_PHYS),
 133                 .length         = 0x00100000,
 134                 .type           = MT_DEVICE
 135         },
 136 };
 137
 138
 139 static void simpad_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 140 {
 141         if (port->mapbase == (u_int)&Ser1UTCR0) {
 142                 if (state)
 143                 {
 144                         simpad_clear_cs3_bit(RS232_ON);
 145                         simpad_clear_cs3_bit(DECT_POWER_ON);
 146                 }else
 147                 {
 148                         simpad_set_cs3_bit(RS232_ON);
 149                         simpad_set_cs3_bit(DECT_POWER_ON);
 150                 }
 151         }
 152 }
 153
 154 static struct sa1100_port_fns simpad_port_fns __initdata = {
 155         .pm        = simpad_uart_pm,
 156 };
 157
 158
 159 static struct mtd_partition simpad_partitions[] = {
 160         {
 161                 .name       = "SIMpad boot firmware",
 162                 .size       = 0x00080000,
 163                 .offset     = 0,
 164                 .mask_flags = MTD_WRITEABLE,
 165         }, {
 166                 .name       = "SIMpad kernel",
 167                 .size       = 0x0010000,
 168                 .offset     = MTDPART_OFS_APPEND,
 169         }, {
 170                 .name       = "SIMpad root jffs2",
 171                 .size       = MTDPART_SIZ_FULL,
 172                 .offset     = MTDPART_OFS_APPEND,
 173         }
 174 };
 175
 176 static struct flash_platform_data simpad_flash_data = {
 177         .map_name    = "cfi_probe",
 178         .parts       = simpad_partitions,
 179         .nr_parts    = ARRAY_SIZE(simpad_partitions),
 180 };
 181
 182
 183 static struct resource simpad_flash_resources [] = {
 184         DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_16M),
 185         DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_16M),
 186 };
 187
 188 static struct ucb1x00_plat_data simpad_ucb1x00_data = {
 189         .gpio_base      = SIMPAD_UCB1X00_GPIO_BASE,
 190 };
 191
 192 static struct mcp_plat_data simpad_mcp_data = {
 193         .mccr0          = MCCR0_ADM,
 194         .sclk_rate      = 11981000,
 195         .codec_pdata    = &simpad_ucb1x00_data,
 196 };
 197
 198
 199
 200 static void __init simpad_map_io(void)
 201 {
 202         sa1100_map_io();
 203
 204         iotable_init(simpad_io_desc, ARRAY_SIZE(simpad_io_desc));
 205
 206         /* Initialize CS3 */
 207         cs3_shadow = (EN1 | EN0 | LED2_ON | DISPLAY_ON |
 208                 RS232_ON | ENABLE_5V | RESET_SIMCARD | DECT_POWER_ON);
 209         __simpad_write_cs3(); /* Spinlocks not yet initialized */
 210
 211         sa1100_register_uart_fns(&simpad_port_fns);
 212         sa1100_register_uart(0, 3);  /* serial interface */
 213         sa1100_register_uart(1, 1);  /* DECT             */
 214
 215         // Reassign UART 1 pins
 216         GAFR |= GPIO_UART_TXD | GPIO_UART_RXD;
 217         GPDR |= GPIO_UART_TXD | GPIO_LDD13 | GPIO_LDD15;
 218         GPDR &= ~GPIO_UART_RXD;
 219         PPAR |= PPAR_UPR;
 220
 221         /*
 222          * Set up registers for sleep mode.
 223          */
 224
 225
 226         PWER = PWER_GPIO0| PWER_RTC;
 227         PGSR = 0x818;
 228         PCFR = 0;
 229         PSDR = 0;
 230
 231 }
 232
 233 static void simpad_power_off(void)
 234 {
 235         local_irq_disable();
 236         cs3_shadow = SD_MEDIAQ;
 237         __simpad_write_cs3(); /* Bypass spinlock here */
 238
 239         /* disable internal oscillator, float CS lines */
 240         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
 241         /* enable wake-up on GPIO0 */
 242         PWER = GFER = GRER = PWER_GPIO0;
 243         /*
 244          * set scratchpad to zero, just in case it is used as a
 245          * restart address by the bootloader.
 246          */
 247         PSPR = 0;
 248         PGSR = 0;
 249         /* enter sleep mode */
 250         PMCR = PMCR_SF;
 251         while(1);
 252
 253         local_irq_enable(); /* we won't ever call it */
 254
 255
 256 }
 257
 258 /*
 259  * gpio_keys
 260 */
 261
 262 static struct gpio_keys_button simpad_button_table[] = {
 263         { KEY_POWER, IRQ_GPIO_POWER_BUTTON, 1, "power button" },
 264 };
 265
 266 static struct gpio_keys_platform_data simpad_keys_data = {
 267         .buttons = simpad_button_table,
 268         .nbuttons = ARRAY_SIZE(simpad_button_table),
 269 };
 270
 271 static struct platform_device simpad_keys = {
 272         .name = "gpio-keys",
 273         .dev = {
 274                 .platform_data = &simpad_keys_data,
 275         },
 276 };
 277
 278 static struct gpio_keys_button simpad_polled_button_table[] = {
 279         { KEY_PROG1, SIMPAD_UCB1X00_GPIO_PROG1, 1, "prog1 button" },
 280         { KEY_PROG2, SIMPAD_UCB1X00_GPIO_PROG2, 1, "prog2 button" },
 281         { KEY_UP,    SIMPAD_UCB1X00_GPIO_UP,    1, "up button" },
 282         { KEY_DOWN,  SIMPAD_UCB1X00_GPIO_DOWN,  1, "down button" },
 283         { KEY_LEFT,  SIMPAD_UCB1X00_GPIO_LEFT,  1, "left button" },
 284         { KEY_RIGHT, SIMPAD_UCB1X00_GPIO_RIGHT, 1, "right button" },
 285 };
 286
 287 static struct gpio_keys_platform_data simpad_polled_keys_data = {
 288         .buttons = simpad_polled_button_table,
 289         .nbuttons = ARRAY_SIZE(simpad_polled_button_table),
 290         .poll_interval = 50,
 291 };
 292
 293 static struct platform_device simpad_polled_keys = {
 294         .name = "gpio-keys-polled",
 295         .dev = {
 296                 .platform_data = &simpad_polled_keys_data,
 297         },
 298 };
 299
 300 /*
 301  * GPIO LEDs
 302  */
 303
 304 static struct gpio_led simpad_leds[] = {
 305         {
 306                 .name = "simpad:power",
 307                 .gpio = SIMPAD_CS3_LED2_ON,
 308                 .active_low = 0,
 309                 .default_trigger = "default-on",
 310         },
 311 };
 312
 313 static struct gpio_led_platform_data simpad_led_data = {
 314         .num_leds = ARRAY_SIZE(simpad_leds),
 315         .leds = simpad_leds,
 316 };
 317
 318 static struct platform_device simpad_gpio_leds = {
 319         .name = "leds-gpio",
 320         .id = 0,
 321         .dev = {
 322                 .platform_data = &simpad_led_data,
 323         },
 324 };
 325
 326 /*
 327  * i2c
 328  */
 329 static struct gpiod_lookup_table simpad_i2c_gpiod_table = {
 330         .dev_id = "i2c-gpio.0",
 331         .table = {
 332                 GPIO_LOOKUP_IDX("gpio", 21, NULL, 0,
 333                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 334                 GPIO_LOOKUP_IDX("gpio", 25, NULL, 1,
 335                                 GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 336         },
 337 };
 338
 339 static struct i2c_gpio_platform_data simpad_i2c_data = {
 340         .udelay = 10,
 341         .timeout = HZ,
 342 };
 343
 344 static struct platform_device simpad_i2c = {
 345         .name = "i2c-gpio",
 346         .id = 0,
 347         .dev = {
 348                 .platform_data = &simpad_i2c_data,
 349         },
 350 };
 351
 352 /*
 353  * MediaQ Video Device
 354  */
 355 static struct platform_device simpad_mq200fb = {
 356         .name = "simpad-mq200",
 357         .id   = 0,
 358 };
 359
 360 static struct platform_device *devices[] __initdata = {
 361         &simpad_keys,
 362         &simpad_polled_keys,
 363         &simpad_mq200fb,
 364         &simpad_gpio_leds,
 365         &simpad_i2c,
 366 };
 367
 368 /* Compact Flash */
 369 static struct gpiod_lookup_table simpad_cf_gpio_table = {
 370         .dev_id = "sa11x0-pcmcia",
 371         .table = {
 372                 GPIO_LOOKUP("gpio", GPIO_CF_IRQ, "cf-ready", GPIO_ACTIVE_HIGH),
 373                 GPIO_LOOKUP("gpio", GPIO_CF_CD, "cf-detect", GPIO_ACTIVE_HIGH),
 374                 { },
 375         },
 376 };
 377
 378
 379 static int __init simpad_init(void)
 380 {
 381         int ret;
 382
 383         spin_lock_init(&cs3_lock);
 384
 385         cs3_gpio.label = "simpad_cs3";
 386         cs3_gpio.base = SIMPAD_CS3_GPIO_BASE;
 387         cs3_gpio.ngpio = 24;
 388         cs3_gpio.set = cs3_gpio_set;
 389         cs3_gpio.get = cs3_gpio_get;
 390         cs3_gpio.direction_input = cs3_gpio_direction_input;
 391         cs3_gpio.direction_output = cs3_gpio_direction_output;
 392         ret = gpiochip_add_data(&cs3_gpio, NULL);
 393         if (ret)
 394                 printk(KERN_WARNING "simpad: Unable to register cs3 GPIO device");
 395
 396         pm_power_off = simpad_power_off;
 397
 398         sa11x0_register_pcmcia(-1, &simpad_cf_gpio_table);
 399         sa11x0_ppc_configure_mcp();
 400         sa11x0_register_mtd(&simpad_flash_data, simpad_flash_resources,
 401                               ARRAY_SIZE(simpad_flash_resources));
 402         sa11x0_register_mcp(&simpad_mcp_data);
 403
 404         gpiod_add_lookup_table(&simpad_i2c_gpiod_table);
 405         ret = platform_add_devices(devices, ARRAY_SIZE(devices));
 406         if(ret)
 407                 printk(KERN_WARNING "simpad: Unable to register mq200 framebuffer device");
 408
 409         return 0;
 410 }
 411
 412 arch_initcall(simpad_init);
 413
 414
 415 MACHINE_START(SIMPAD, "Simpad")
 416         /* Maintainer: Holger Freyther */
 417         .atag_offset    = 0x100,
 418         .map_io         = simpad_map_io,
 419         .nr_irqs        = SA1100_NR_IRQS,
 420         .init_irq       = sa1100_init_irq,
 421         .init_late      = sa11x0_init_late,
 422         .init_time      = sa1100_timer_init,
 423         .restart        = sa11x0_restart,
 424 MACHINE_END