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/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/spi/spi.h>
  14
  15 #include <linux/platform_data/omap-wd-timer.h>
  16 #include <linux/soc/ti/omap1-io.h>
  17
  18 #include <asm/mach/map.h>
  19
  20 #include "tc.h"
  21 #include "mux.h"
  22
  23 #include "hardware.h"
  24 #include "common.h"
  25 #include "clock.h"
  26 #include "mmc.h"
  27 #include "sram.h"
  28
  29 #if IS_ENABLED(CONFIG_RTC_DRV_OMAP)
  30
  31 #define OMAP_RTC_BASE           0xfffb4800
  32
  33 static struct resource rtc_resources[] = {
  34         {
  35                 .start          = OMAP_RTC_BASE,
  36                 .end            = OMAP_RTC_BASE + 0x5f,
  37                 .flags          = IORESOURCE_MEM,
  38         },
  39         {
  40                 .start          = INT_RTC_TIMER,
  41                 .flags          = IORESOURCE_IRQ,
  42         },
  43         {
  44                 .start          = INT_RTC_ALARM,
  45                 .flags          = IORESOURCE_IRQ,
  46         },
  47 };
  48
  49 static struct platform_device omap_rtc_device = {
  50         .name           = "omap_rtc",
  51         .id             = -1,
  52         .num_resources  = ARRAY_SIZE(rtc_resources),
  53         .resource       = rtc_resources,
  54 };
  55
  56 static void omap_init_rtc(void)
  57 {
  58         (void) platform_device_register(&omap_rtc_device);
  59 }
  60 #else
  61 static inline void omap_init_rtc(void) {}
  62 #endif
  63
  64 /*-------------------------------------------------------------------------*/
  65
  66 #if IS_ENABLED(CONFIG_MMC_OMAP)
  67
  68 static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
  69                         int controller_nr)
  70 {
  71         if (controller_nr == 0) {
  72                 omap_cfg_reg(MMC_CMD);
  73                 omap_cfg_reg(MMC_CLK);
  74                 omap_cfg_reg(MMC_DAT0);
  75
  76                 if (cpu_is_omap1710()) {
  77                         omap_cfg_reg(M15_1710_MMC_CLKI);
  78                         omap_cfg_reg(P19_1710_MMC_CMDDIR);
  79                         omap_cfg_reg(P20_1710_MMC_DATDIR0);
  80                 }
  81                 if (mmc_controller->slots[0].wires == 4) {
  82                         omap_cfg_reg(MMC_DAT1);
  83                         /* NOTE: DAT2 can be on W10 (here) or M15 */
  84                         if (!mmc_controller->slots[0].nomux)
  85                                 omap_cfg_reg(MMC_DAT2);
  86                         omap_cfg_reg(MMC_DAT3);
  87                 }
  88         }
  89
  90         /* Block 2 is on newer chips, and has many pinout options */
  91         if (cpu_is_omap16xx() && controller_nr == 1) {
  92                 if (!mmc_controller->slots[1].nomux) {
  93                         omap_cfg_reg(Y8_1610_MMC2_CMD);
  94                         omap_cfg_reg(Y10_1610_MMC2_CLK);
  95                         omap_cfg_reg(R18_1610_MMC2_CLKIN);
  96                         omap_cfg_reg(W8_1610_MMC2_DAT0);
  97                         if (mmc_controller->slots[1].wires == 4) {
  98                                 omap_cfg_reg(V8_1610_MMC2_DAT1);
  99                                 omap_cfg_reg(W15_1610_MMC2_DAT2);
 100                                 omap_cfg_reg(R10_1610_MMC2_DAT3);
 101                         }
 102
 103                         /* These are needed for the level shifter */
 104                         omap_cfg_reg(V9_1610_MMC2_CMDDIR);
 105                         omap_cfg_reg(V5_1610_MMC2_DATDIR0);
 106                         omap_cfg_reg(W19_1610_MMC2_DATDIR1);
 107                 }
 108
 109                 /* Feedback clock must be set on OMAP-1710 MMC2 */
 110                 if (cpu_is_omap1710())
 111                         omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
 112                                         MOD_CONF_CTRL_1);
 113         }
 114 }
 115
 116 #define OMAP_MMC_NR_RES         4
 117
 118 /*
 119  * Register MMC devices.
 120  */
 121 static int __init omap_mmc_add(const char *name, int id, unsigned long base,
 122                                 unsigned long size, unsigned int irq,
 123                                 unsigned rx_req, unsigned tx_req,
 124                                 struct omap_mmc_platform_data *data)
 125 {
 126         struct platform_device *pdev;
 127         struct resource res[OMAP_MMC_NR_RES];
 128         int ret;
 129
 130         pdev = platform_device_alloc(name, id);
 131         if (!pdev)
 132                 return -ENOMEM;
 133
 134         memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
 135         res[0].start = base;
 136         res[0].end = base + size - 1;
 137         res[0].flags = IORESOURCE_MEM;
 138         res[1].start = res[1].end = irq;
 139         res[1].flags = IORESOURCE_IRQ;
 140         res[2].start = rx_req;
 141         res[2].name = "rx";
 142         res[2].flags = IORESOURCE_DMA;
 143         res[3].start = tx_req;
 144         res[3].name = "tx";
 145         res[3].flags = IORESOURCE_DMA;
 146
 147         if (cpu_is_omap15xx())
 148                 data->slots[0].features = MMC_OMAP15XX;
 149         if (cpu_is_omap16xx())
 150                 data->slots[0].features = MMC_OMAP16XX;
 151
 152         ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
 153         if (ret == 0)
 154                 ret = platform_device_add_data(pdev, data, sizeof(*data));
 155         if (ret)
 156                 goto fail;
 157
 158         ret = platform_device_add(pdev);
 159         if (ret)
 160                 goto fail;
 161
 162         /* return device handle to board setup code */
 163         data->dev = &pdev->dev;
 164         return 0;
 165
 166 fail:
 167         platform_device_put(pdev);
 168         return ret;
 169 }
 170
 171 void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
 172                         int nr_controllers)
 173 {
 174         int i;
 175
 176         for (i = 0; i < nr_controllers; i++) {
 177                 unsigned long base, size;
 178                 unsigned rx_req, tx_req;
 179                 unsigned int irq = 0;
 180
 181                 if (!mmc_data[i])
 182                         continue;
 183
 184                 omap1_mmc_mux(mmc_data[i], i);
 185
 186                 switch (i) {
 187                 case 0:
 188                         base = OMAP1_MMC1_BASE;
 189                         irq = INT_MMC;
 190                         rx_req = 22;
 191                         tx_req = 21;
 192                         break;
 193                 case 1:
 194                         if (!cpu_is_omap16xx())
 195                                 return;
 196                         base = OMAP1_MMC2_BASE;
 197                         irq = INT_1610_MMC2;
 198                         rx_req = 55;
 199                         tx_req = 54;
 200                         break;
 201                 default:
 202                         continue;
 203                 }
 204                 size = OMAP1_MMC_SIZE;
 205
 206                 omap_mmc_add("mmci-omap", i, base, size, irq,
 207                                 rx_req, tx_req, mmc_data[i]);
 208         }
 209 }
 210
 211 #endif
 212
 213 /*-------------------------------------------------------------------------*/
 214
 215 /* Numbering for the SPI-capable controllers when used for SPI:
 216  * spi          = 1
 217  * uwire        = 2
 218  * mmc1..2      = 3..4
 219  * mcbsp1..3    = 5..7
 220  */
 221
 222 #if IS_ENABLED(CONFIG_SPI_OMAP_UWIRE)
 223
 224 #define OMAP_UWIRE_BASE         0xfffb3000
 225
 226 static struct resource uwire_resources[] = {
 227         {
 228                 .start          = OMAP_UWIRE_BASE,
 229                 .end            = OMAP_UWIRE_BASE + 0x20,
 230                 .flags          = IORESOURCE_MEM,
 231         },
 232 };
 233
 234 static struct platform_device omap_uwire_device = {
 235         .name      = "omap_uwire",
 236         .id          = -1,
 237         .num_resources  = ARRAY_SIZE(uwire_resources),
 238         .resource       = uwire_resources,
 239 };
 240
 241 static void omap_init_uwire(void)
 242 {
 243         /* FIXME define and use a boot tag; not all boards will be hooking
 244          * up devices to the microwire controller, and multi-board configs
 245          * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
 246          */
 247
 248         /* board-specific code must configure chipselects (only a few
 249          * are normally used) and SCLK/SDI/SDO (each has two choices).
 250          */
 251         (void) platform_device_register(&omap_uwire_device);
 252 }
 253 #else
 254 static inline void omap_init_uwire(void) {}
 255 #endif
 256
 257
 258 #define OMAP1_RNG_BASE          0xfffe5000
 259
 260 static struct resource omap1_rng_resources[] = {
 261         {
 262                 .start          = OMAP1_RNG_BASE,
 263                 .end            = OMAP1_RNG_BASE + 0x4f,
 264                 .flags          = IORESOURCE_MEM,
 265         },
 266 };
 267
 268 static struct platform_device omap1_rng_device = {
 269         .name           = "omap_rng",
 270         .id             = -1,
 271         .num_resources  = ARRAY_SIZE(omap1_rng_resources),
 272         .resource       = omap1_rng_resources,
 273 };
 274
 275 static void omap1_init_rng(void)
 276 {
 277         if (!cpu_is_omap16xx())
 278                 return;
 279
 280         (void) platform_device_register(&omap1_rng_device);
 281 }
 282
 283 /*-------------------------------------------------------------------------*/
 284
 285 /*
 286  * This gets called after board-specific INIT_MACHINE, and initializes most
 287  * on-chip peripherals accessible on this board (except for few like USB):
 288  *
 289  *  (a) Does any "standard config" pin muxing needed.  Board-specific
 290  *      code will have muxed GPIO pins and done "nonstandard" setup;
 291  *      that code could live in the boot loader.
 292  *  (b) Populating board-specific platform_data with the data drivers
 293  *      rely on to handle wiring variations.
 294  *  (c) Creating platform devices as meaningful on this board and
 295  *      with this kernel configuration.
 296  *
 297  * Claiming GPIOs, and setting their direction and initial values, is the
 298  * responsibility of the device drivers.  So is responding to probe().
 299  *
 300  * Board-specific knowledge like creating devices or pin setup is to be
 301  * kept out of drivers as much as possible.  In particular, pin setup
 302  * may be handled by the boot loader, and drivers should expect it will
 303  * normally have been done by the time they're probed.
 304  */
 305 static int __init omap1_init_devices(void)
 306 {
 307         if (!cpu_class_is_omap1())
 308                 return -ENODEV;
 309
 310         omap1_sram_init();
 311         omap1_clk_late_init();
 312
 313         /* please keep these calls, and their implementations above,
 314          * in alphabetical order so they're easier to sort through.
 315          */
 316
 317         omap_init_rtc();
 318         omap_init_uwire();
 319         omap1_init_rng();
 320
 321         return 0;
 322 }
 323 arch_initcall(omap1_init_devices);
 324
 325 #if IS_ENABLED(CONFIG_OMAP_WATCHDOG)
 326
 327 static struct resource wdt_resources[] = {
 328         {
 329                 .start          = 0xfffeb000,
 330                 .end            = 0xfffeb07F,
 331                 .flags          = IORESOURCE_MEM,
 332         },
 333 };
 334
 335 static struct platform_device omap_wdt_device = {
 336         .name           = "omap_wdt",
 337         .id             = -1,
 338         .num_resources  = ARRAY_SIZE(wdt_resources),
 339         .resource       = wdt_resources,
 340 };
 341
 342 static int __init omap_init_wdt(void)
 343 {
 344         struct omap_wd_timer_platform_data pdata;
 345         int ret;
 346
 347         if (!cpu_is_omap16xx())
 348                 return -ENODEV;
 349
 350         pdata.read_reset_sources = omap1_get_reset_sources;
 351
 352         ret = platform_device_register(&omap_wdt_device);
 353         if (!ret) {
 354                 ret = platform_device_add_data(&omap_wdt_device, &pdata,
 355                                                sizeof(pdata));
 356                 if (ret)
 357                         platform_device_del(&omap_wdt_device);
 358         }
 359
 360         return ret;
 361 }
 362 subsys_initcall(omap_init_wdt);
 363 #endif