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 #include <linux/soc/ti/omap1-io.h>
  18
  19 #include <asm/mach/map.h>
  20
  21 #include "tc.h"
  22 #include "mux.h"
  23
  24 #include "hardware.h"
  25 #include "common.h"
  26 #include "clock.h"
  27 #include "mmc.h"
  28 #include "sram.h"
  29
  30 #if IS_ENABLED(CONFIG_RTC_DRV_OMAP)
  31
  32 #define OMAP_RTC_BASE           0xfffb4800
  33
  34 static struct resource rtc_resources[] = {
  35         {
  36                 .start          = OMAP_RTC_BASE,
  37                 .end            = OMAP_RTC_BASE + 0x5f,
  38                 .flags          = IORESOURCE_MEM,
  39         },
  40         {
  41                 .start          = INT_RTC_TIMER,
  42                 .flags          = IORESOURCE_IRQ,
  43         },
  44         {
  45                 .start          = INT_RTC_ALARM,
  46                 .flags          = IORESOURCE_IRQ,
  47         },
  48 };
  49
  50 static struct platform_device omap_rtc_device = {
  51         .name           = "omap_rtc",
  52         .id             = -1,
  53         .num_resources  = ARRAY_SIZE(rtc_resources),
  54         .resource       = rtc_resources,
  55 };
  56
  57 static void omap_init_rtc(void)
  58 {
  59         (void) platform_device_register(&omap_rtc_device);
  60 }
  61 #else
  62 static inline void omap_init_rtc(void) {}
  63 #endif
  64
  65 /*-------------------------------------------------------------------------*/
  66
  67 #if IS_ENABLED(CONFIG_MMC_OMAP)
  68
  69 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
  70                         int controller_nr)
  71 {
  72         if (controller_nr == 0) {
  73                 omap_cfg_reg(MMC_CMD);
  74                 omap_cfg_reg(MMC_CLK);
  75                 omap_cfg_reg(MMC_DAT0);
  76
  77                 if (cpu_is_omap1710()) {
  78                         omap_cfg_reg(M15_1710_MMC_CLKI);
  79                         omap_cfg_reg(P19_1710_MMC_CMDDIR);
  80                         omap_cfg_reg(P20_1710_MMC_DATDIR0);
  81                 }
  82                 if (mmc_controller->slots[0].wires == 4) {
  83                         omap_cfg_reg(MMC_DAT1);
  84                         /* NOTE: DAT2 can be on W10 (here) or M15 */
  85                         if (!mmc_controller->slots[0].nomux)
  86                                 omap_cfg_reg(MMC_DAT2);
  87                         omap_cfg_reg(MMC_DAT3);
  88                 }
  89         }
  90
  91         /* Block 2 is on newer chips, and has many pinout options */
  92         if (cpu_is_omap16xx() && controller_nr == 1) {
  93                 if (!mmc_controller->slots[1].nomux) {
  94                         omap_cfg_reg(Y8_1610_MMC2_CMD);
  95                         omap_cfg_reg(Y10_1610_MMC2_CLK);
  96                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
  97                         omap_cfg_reg(W8_1610_MMC2_DAT0);
  98                         if (mmc_controller->slots[1].wires == 4) {
  99                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
 100                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 101                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 102                         }
 103
 104                         /* These are needed for the level shifter */
 105                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 106                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 107                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 108                 }
 109
 110                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 111                 if (cpu_is_omap1710())
 112                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 113                                         MOD_CONF_CTRL_1);
 114         }
 115 }
 116
 117 #define OMAP_MMC_NR_RES         4
 118
 119 /*
 120  * Register MMC devices.
 121  */
 122 static int __init omap_mmc_add(const char *name, int id, unsigned long base,
 123                                 unsigned long size, unsigned int irq,
 124                                 unsigned rx_req, unsigned tx_req,
 125                                 struct omap_mmc_platform_data *data)
 126 {
 127         struct platform_device *pdev;
 128         struct resource res[OMAP_MMC_NR_RES];
 129         int ret;
 130
 131         pdev = platform_device_alloc(name, id);
 132         if (!pdev)
 133                 return -ENOMEM;
 134
 135         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
 136         res[0].start = base;
 137         res[0].end = base + size - 1;
 138         res[0].flags = IORESOURCE_MEM;
 139         res[1].start = res[1].end = irq;
 140         res[1].flags = IORESOURCE_IRQ;
 141         res[2].start = rx_req;
 142         res[2].name = "rx";
 143         res[2].flags = IORESOURCE_DMA;
 144         res[3].start = tx_req;
 145         res[3].name = "tx";
 146         res[3].flags = IORESOURCE_DMA;
 147
 148         if (cpu_is_omap15xx())
 149                 data->slots[0].features = MMC_OMAP15XX;
 150         if (cpu_is_omap16xx())
 151                 data->slots[0].features = MMC_OMAP16XX;
 152
 153         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
 154         if (ret == 0)
 155                 ret = platform_device_add_data(pdev, data, sizeof(*data));
 156         if (ret)
 157                 goto fail;
 158
 159         ret = platform_device_add(pdev);
 160         if (ret)
 161                 goto fail;
 162
 163         /* return device handle to board setup code */
 164         data->dev = &pdev->dev;
 165         return 0;
 166
 167 fail:
 168         platform_device_put(pdev);
 169         return ret;
 170 }
 171
 172 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 173                         int nr_controllers)
 174 {
 175         int i;
 176
 177         for (i = 0; i < nr_controllers; i++) {
 178                 unsigned long base, size;
 179                 unsigned rx_req, tx_req;
 180                 unsigned int irq = 0;
 181
 182                 if (!mmc_data[i])
 183                         continue;
 184
 185                 omap1_mmc_mux(mmc_data[i], i);
 186
 187                 switch (i) {
 188                 case 0:
 189                         base = OMAP1_MMC1_BASE;
 190                         irq = INT_MMC;
 191                         rx_req = 22;
 192                         tx_req = 21;
 193                         break;
 194                 case 1:
 195                         if (!cpu_is_omap16xx())
 196                                 return;
 197                         base = OMAP1_MMC2_BASE;
 198                         irq = INT_1610_MMC2;
 199                         rx_req = 55;
 200                         tx_req = 54;
 201                         break;
 202                 default:
 203                         continue;
 204                 }
 205                 size = OMAP1_MMC_SIZE;
 206
 207                 omap_mmc_add("mmci-omap", i, base, size, irq,
 208                                 rx_req, tx_req, mmc_data[i]);
 209         }
 210 }
 211
 212 #endif
 213
 214 /*-------------------------------------------------------------------------*/
 215
 216 /* Numbering for the SPI-capable controllers when used for SPI:
 217  * spi          = 1
 218  * uwire        = 2
 219  * mmc1..2      = 3..4
 220  * mcbsp1..3    = 5..7
 221  */
 222
 223 #if IS_ENABLED(CONFIG_SPI_OMAP_UWIRE)
 224
 225 #define OMAP_UWIRE_BASE         0xfffb3000
 226
 227 static struct resource uwire_resources[] = {
 228         {
 229                 .start          = OMAP_UWIRE_BASE,
 230                 .end            = OMAP_UWIRE_BASE + 0x20,
 231                 .flags          = IORESOURCE_MEM,
 232         },
 233 };
 234
 235 static struct platform_device omap_uwire_device = {
 236         .name      = "omap_uwire",
 237         .id          = -1,
 238         .num_resources  = ARRAY_SIZE(uwire_resources),
 239         .resource       = uwire_resources,
 240 };
 241
 242 static void omap_init_uwire(void)
 243 {
 244         /* FIXME define and use a boot tag; not all boards will be hooking
 245          * up devices to the microwire controller, and multi-board configs
 246          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 247          */
 248
 249         /* board-specific code must configure chipselects (only a few
 250          * are normally used) and SCLK/SDI/SDO (each has two choices).
 251          */
 252         (void) platform_device_register(&omap_uwire_device);
 253 }
 254 #else
 255 static inline void omap_init_uwire(void) {}
 256 #endif
 257
 258
 259 #define OMAP1_RNG_BASE          0xfffe5000
 260
 261 static struct resource omap1_rng_resources[] = {
 262         {
 263                 .start          = OMAP1_RNG_BASE,
 264                 .end            = OMAP1_RNG_BASE + 0x4f,
 265                 .flags          = IORESOURCE_MEM,
 266         },
 267 };
 268
 269 static struct platform_device omap1_rng_device = {
 270         .name           = "omap_rng",
 271         .id             = -1,
 272         .num_resources  = ARRAY_SIZE(omap1_rng_resources),
 273         .resource       = omap1_rng_resources,
 274 };
 275
 276 static void omap1_init_rng(void)
 277 {
 278         if (!cpu_is_omap16xx())
 279                 return;
 280
 281         (void) platform_device_register(&omap1_rng_device);
 282 }
 283
 284 /*-------------------------------------------------------------------------*/
 285
 286 /*
 287  * This gets called after board-specific INIT_MACHINE, and initializes most
 288  * on-chip peripherals accessible on this board (except for few like USB):
 289  *
 290  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 291  *      code will have muxed GPIO pins and done "nonstandard" setup;
 292  *      that code could live in the boot loader.
 293  *  (b) Populating board-specific platform_data with the data drivers
 294  *      rely on to handle wiring variations.
 295  *  (c) Creating platform devices as meaningful on this board and
 296  *      with this kernel configuration.
 297  *
 298  * Claiming GPIOs, and setting their direction and initial values, is the
 299  * responsibility of the device drivers.  So is responding to probe().
 300  *
 301  * Board-specific knowledge like creating devices or pin setup is to be
 302  * kept out of drivers as much as possible.  In particular, pin setup
 303  * may be handled by the boot loader, and drivers should expect it will
 304  * normally have been done by the time they're probed.
 305  */
 306 static int __init omap1_init_devices(void)
 307 {
 308         if (!cpu_class_is_omap1())
 309                 return -ENODEV;
 310
 311         omap1_sram_init();
 312         omap1_clk_late_init();
 313
 314         /* please keep these calls, and their implementations above,
 315          * in alphabetical order so they're easier to sort through.
 316          */
 317
 318         omap_init_rtc();
 319         omap_init_uwire();
 320         omap1_init_rng();
 321
 322         return 0;
 323 }
 324 arch_initcall(omap1_init_devices);
 325
 326 #if IS_ENABLED(CONFIG_OMAP_WATCHDOG)
 327
 328 static struct resource wdt_resources[] = {
 329         {
 330                 .start          = 0xfffeb000,
 331                 .end            = 0xfffeb07F,
 332                 .flags          = IORESOURCE_MEM,
 333         },
 334 };
 335
 336 static struct platform_device omap_wdt_device = {
 337         .name           = "omap_wdt",
 338         .id             = -1,
 339         .num_resources  = ARRAY_SIZE(wdt_resources),
 340         .resource       = wdt_resources,
 341 };
 342
 343 static int __init omap_init_wdt(void)
 344 {
 345         struct omap_wd_timer_platform_data pdata;
 346         int ret;
 347
 348         if (!cpu_is_omap16xx())
 349                 return -ENODEV;
 350
 351         pdata.read_reset_sources = omap1_get_reset_sources;
 352
 353         ret = platform_device_register(&omap_wdt_device);
 354         if (!ret) {
 355                 ret = platform_device_add_data(&omap_wdt_device, &pdata,
 356                                                sizeof(pdata));
 357                 if (ret)
 358                         platform_device_del(&omap_wdt_device);
 359         }
 360
 361         return ret;
 362 }
 363 subsys_initcall(omap_init_wdt);
 364 #endif