arch/arm/mach-omap1/devices.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * linux/arch/arm/mach-omap1/devices.c
   4  *
   5  * OMAP1 platform device setup/initialization
   6  */
   7
   8 #include <linux/dma-mapping.h>
   9 #include <linux/gpio.h>
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/spi/spi.h>
  15
  16 #include <linux/platform_data/omap-wd-timer.h>
  17
  18 #include <asm/mach/map.h>
  19
  20 #include <mach/tc.h>
  21 #include <mach/mux.h>
  22
  23 #include <mach/omap7xx.h>
  24 #include <mach/hardware.h>
  25
  26 #include "common.h"
  27 #include "clock.h"
  28 #include "mmc.h"
  29 #include "sram.h"
  30
  31 #if IS_ENABLED(CONFIG_RTC_DRV_OMAP)
  32
  33 #define OMAP_RTC_BASE           0xfffb4800
  34
  35 static struct resource rtc_resources[] = {
  36         {
  37                 .start          = OMAP_RTC_BASE,
  38                 .end            = OMAP_RTC_BASE + 0x5f,
  39                 .flags          = IORESOURCE_MEM,
  40         },
  41         {
  42                 .start          = INT_RTC_TIMER,
  43                 .flags          = IORESOURCE_IRQ,
  44         },
  45         {
  46                 .start          = INT_RTC_ALARM,
  47                 .flags          = IORESOURCE_IRQ,
  48         },
  49 };
  50
  51 static struct platform_device omap_rtc_device = {
  52         .name           = "omap_rtc",
  53         .id             = -1,
  54         .num_resources  = ARRAY_SIZE(rtc_resources),
  55         .resource       = rtc_resources,
  56 };
  57
  58 static void omap_init_rtc(void)
  59 {
  60         (void) platform_device_register(&omap_rtc_device);
  61 }
  62 #else
  63 static inline void omap_init_rtc(void) {}
  64 #endif
  65
  66 static inline void omap_init_mbox(void) { }
  67
  68 /*-------------------------------------------------------------------------*/
  69
  70 #if IS_ENABLED(CONFIG_MMC_OMAP)
  71
  72 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
  73                         int controller_nr)
  74 {
  75         if (controller_nr == 0) {
  76                 if (cpu_is_omap7xx()) {
  77                         omap_cfg_reg(MMC_7XX_CMD);
  78                         omap_cfg_reg(MMC_7XX_CLK);
  79                         omap_cfg_reg(MMC_7XX_DAT0);
  80                 } else {
  81                         omap_cfg_reg(MMC_CMD);
  82                         omap_cfg_reg(MMC_CLK);
  83                         omap_cfg_reg(MMC_DAT0);
  84                 }
  85
  86                 if (cpu_is_omap1710()) {
  87                         omap_cfg_reg(M15_1710_MMC_CLKI);
  88                         omap_cfg_reg(P19_1710_MMC_CMDDIR);
  89                         omap_cfg_reg(P20_1710_MMC_DATDIR0);
  90                 }
  91                 if (mmc_controller->slots[0].wires == 4 && !cpu_is_omap7xx()) {
  92                         omap_cfg_reg(MMC_DAT1);
  93                         /* NOTE: DAT2 can be on W10 (here) or M15 */
  94                         if (!mmc_controller->slots[0].nomux)
  95                                 omap_cfg_reg(MMC_DAT2);
  96                         omap_cfg_reg(MMC_DAT3);
  97                 }
  98         }
  99
 100         /* Block 2 is on newer chips, and has many pinout options */
 101         if (cpu_is_omap16xx() && controller_nr == 1) {
 102                 if (!mmc_controller->slots[1].nomux) {
 103                         omap_cfg_reg(Y8_1610_MMC2_CMD);
 104                         omap_cfg_reg(Y10_1610_MMC2_CLK);
 105                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
 106                         omap_cfg_reg(W8_1610_MMC2_DAT0);
 107                         if (mmc_controller->slots[1].wires == 4) {
 108                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 109                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 110                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 111                         }
 112
 113                         /* These are needed for the level shifter */
 114                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 115                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 116                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 117                 }
 118
 119                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 120                 if (cpu_is_omap1710())
 121                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 122                                         MOD_CONF_CTRL_1);
 123         }
 124 }
 125
 126 #define OMAP_MMC_NR_RES         4
 127
 128 /*
 129  * Register MMC devices.
 130  */
 131 static int __init omap_mmc_add(const char *name, int id, unsigned long base,
 132                                 unsigned long size, unsigned int irq,
 133                                 unsigned rx_req, unsigned tx_req,
 134                                 struct omap_mmc_platform_data *data)
 135 {
 136         struct platform_device *pdev;
 137         struct resource res[OMAP_MMC_NR_RES];
 138         int ret;
 139
 140         pdev = platform_device_alloc(name, id);
 141         if (!pdev)
 142                 return -ENOMEM;
 143
 144         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
 145         res[0].start = base;
 146         res[0].end = base + size - 1;
 147         res[0].flags = IORESOURCE_MEM;
 148         res[1].start = res[1].end = irq;
 149         res[1].flags = IORESOURCE_IRQ;
 150         res[2].start = rx_req;
 151         res[2].name = "rx";
 152         res[2].flags = IORESOURCE_DMA;
 153         res[3].start = tx_req;
 154         res[3].name = "tx";
 155         res[3].flags = IORESOURCE_DMA;
 156
 157         if (cpu_is_omap7xx())
 158                 data->slots[0].features = MMC_OMAP7XX;
 159         if (cpu_is_omap15xx())
 160                 data->slots[0].features = MMC_OMAP15XX;
 161         if (cpu_is_omap16xx())
 162                 data->slots[0].features = MMC_OMAP16XX;
 163
 164         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
 165         if (ret == 0)
 166                 ret = platform_device_add_data(pdev, data, sizeof(*data));
 167         if (ret)
 168                 goto fail;
 169
 170         ret = platform_device_add(pdev);
 171         if (ret)
 172                 goto fail;
 173
 174         /* return device handle to board setup code */
 175         data->dev = &pdev->dev;
 176         return 0;
 177
 178 fail:
 179         platform_device_put(pdev);
 180         return ret;
 181 }
 182
 183 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 184                         int nr_controllers)
 185 {
 186         int i;
 187
 188         for (i = 0; i < nr_controllers; i++) {
 189                 unsigned long base, size;
 190                 unsigned rx_req, tx_req;
 191                 unsigned int irq = 0;
 192
 193                 if (!mmc_data[i])
 194                         continue;
 195
 196                 omap1_mmc_mux(mmc_data[i], i);
 197
 198                 switch (i) {
 199                 case 0:
 200                         base = OMAP1_MMC1_BASE;
 201                         irq = INT_MMC;
 202                         rx_req = 22;
 203                         tx_req = 21;
 204                         break;
 205                 case 1:
 206                         if (!cpu_is_omap16xx())
 207                                 return;
 208                         base = OMAP1_MMC2_BASE;
 209                         irq = INT_1610_MMC2;
 210                         rx_req = 55;
 211                         tx_req = 54;
 212                         break;
 213                 default:
 214                         continue;
 215                 }
 216                 size = OMAP1_MMC_SIZE;
 217
 218                 omap_mmc_add("mmci-omap", i, base, size, irq,
 219                                 rx_req, tx_req, mmc_data[i]);
 220         }
 221 }
 222
 223 #endif
 224
 225 /*-------------------------------------------------------------------------*/
 226
 227 /* OMAP7xx SPI support */
 228 #if IS_ENABLED(CONFIG_SPI_OMAP_100K)
 229
 230 struct platform_device omap_spi1 = {
 231         .name           = "omap1_spi100k",
 232         .id             = 1,
 233 };
 234
 235 struct platform_device omap_spi2 = {
 236         .name           = "omap1_spi100k",
 237         .id             = 2,
 238 };
 239
 240 static void omap_init_spi100k(void)
 241 {
 242         if (!cpu_is_omap7xx())
 243                 return;
 244
 245         omap_spi1.dev.platform_data = ioremap(OMAP7XX_SPI1_BASE, 0x7ff);
 246         if (omap_spi1.dev.platform_data)
 247                 platform_device_register(&omap_spi1);
 248
 249         omap_spi2.dev.platform_data = ioremap(OMAP7XX_SPI2_BASE, 0x7ff);
 250         if (omap_spi2.dev.platform_data)
 251                 platform_device_register(&omap_spi2);
 252 }
 253
 254 #else
 255 static inline void omap_init_spi100k(void)
 256 {
 257 }
 258 #endif
 259
 260 /*-------------------------------------------------------------------------*/
 261
 262 static inline void omap_init_sti(void) {}
 263
 264 /* Numbering for the SPI-capable controllers when used for SPI:
 265  * spi          = 1
 266  * uwire        = 2
 267  * mmc1..2      = 3..4
 268  * mcbsp1..3    = 5..7
 269  */
 270
 271 #if IS_ENABLED(CONFIG_SPI_OMAP_UWIRE)
 272
 273 #define OMAP_UWIRE_BASE         0xfffb3000
 274
 275 static struct resource uwire_resources[] = {
 276         {
 277                 .start          = OMAP_UWIRE_BASE,
 278                 .end            = OMAP_UWIRE_BASE + 0x20,
 279                 .flags          = IORESOURCE_MEM,
 280         },
 281 };
 282
 283 static struct platform_device omap_uwire_device = {
 284         .name      = "omap_uwire",
 285         .id          = -1,
 286         .num_resources  = ARRAY_SIZE(uwire_resources),
 287         .resource       = uwire_resources,
 288 };
 289
 290 static void omap_init_uwire(void)
 291 {
 292         /* FIXME define and use a boot tag; not all boards will be hooking
 293          * up devices to the microwire controller, and multi-board configs
 294          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 295          */
 296
 297         /* board-specific code must configure chipselects (only a few
 298          * are normally used) and SCLK/SDI/SDO (each has two choices).
 299          */
 300         (void) platform_device_register(&omap_uwire_device);
 301 }
 302 #else
 303 static inline void omap_init_uwire(void) {}
 304 #endif
 305
 306
 307 #define OMAP1_RNG_BASE          0xfffe5000
 308
 309 static struct resource omap1_rng_resources[] = {
 310         {
 311                 .start          = OMAP1_RNG_BASE,
 312                 .end            = OMAP1_RNG_BASE + 0x4f,
 313                 .flags          = IORESOURCE_MEM,
 314         },
 315 };
 316
 317 static struct platform_device omap1_rng_device = {
 318         .name           = "omap_rng",
 319         .id             = -1,
 320         .num_resources  = ARRAY_SIZE(omap1_rng_resources),
 321         .resource       = omap1_rng_resources,
 322 };
 323
 324 static void omap1_init_rng(void)
 325 {
 326         if (!cpu_is_omap16xx())
 327                 return;
 328
 329         (void) platform_device_register(&omap1_rng_device);
 330 }
 331
 332 /*-------------------------------------------------------------------------*/
 333
 334 /*
 335  * This gets called after board-specific INIT_MACHINE, and initializes most
 336  * on-chip peripherals accessible on this board (except for few like USB):
 337  *
 338  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 339  *      code will have muxed GPIO pins and done "nonstandard" setup;
 340  *      that code could live in the boot loader.
 341  *  (b) Populating board-specific platform_data with the data drivers
 342  *      rely on to handle wiring variations.
 343  *  (c) Creating platform devices as meaningful on this board and
 344  *      with this kernel configuration.
 345  *
 346  * Claiming GPIOs, and setting their direction and initial values, is the
 347  * responsibility of the device drivers.  So is responding to probe().
 348  *
 349  * Board-specific knowledge like creating devices or pin setup is to be
 350  * kept out of drivers as much as possible.  In particular, pin setup
 351  * may be handled by the boot loader, and drivers should expect it will
 352  * normally have been done by the time they're probed.
 353  */
 354 static int __init omap1_init_devices(void)
 355 {
 356         if (!cpu_class_is_omap1())
 357                 return -ENODEV;
 358
 359         omap_sram_init();
 360         omap1_clk_late_init();
 361
 362         /* please keep these calls, and their implementations above,
 363          * in alphabetical order so they're easier to sort through.
 364          */
 365
 366         omap_init_mbox();
 367         omap_init_rtc();
 368         omap_init_spi100k();
 369         omap_init_sti();
 370         omap_init_uwire();
 371         omap1_init_rng();
 372
 373         return 0;
 374 }
 375 arch_initcall(omap1_init_devices);
 376
 377 #if IS_ENABLED(CONFIG_OMAP_WATCHDOG)
 378
 379 static struct resource wdt_resources[] = {
 380         {
 381                 .start          = 0xfffeb000,
 382                 .end            = 0xfffeb07F,
 383                 .flags          = IORESOURCE_MEM,
 384         },
 385 };
 386
 387 static struct platform_device omap_wdt_device = {
 388         .name           = "omap_wdt",
 389         .id             = -1,
 390         .num_resources  = ARRAY_SIZE(wdt_resources),
 391         .resource       = wdt_resources,
 392 };
 393
 394 static int __init omap_init_wdt(void)
 395 {
 396         struct omap_wd_timer_platform_data pdata;
 397         int ret;
 398
 399         if (!cpu_is_omap16xx())
 400                 return -ENODEV;
 401
 402         pdata.read_reset_sources = omap1_get_reset_sources;
 403
 404         ret = platform_device_register(&omap_wdt_device);
 405         if (!ret) {
 406                 ret = platform_device_add_data(&omap_wdt_device, &pdata,
 407                                                sizeof(pdata));
 408                 if (ret)
 409                         platform_device_del(&omap_wdt_device);
 410         }
 411
 412         return ret;
 413 }
 414 subsys_initcall(omap_init_wdt);
 415 #endif