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