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