arch/arm/mach-omap1/mcbsp.c

   1 /*
   2  * linux/arch/arm/mach-omap1/mcbsp.c
   3  *
   4  * Copyright (C) 2008 Instituto Nokia de Tecnologia
   5  * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Multichannel mode not supported.
  12  */
  13 #include <linux/ioport.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/clk.h>
  17 #include <linux/err.h>
  18 #include <linux/io.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/slab.h>
  21
  22 #include <plat/dma.h>
  23 #include <plat/mux.h>
  24 #include <plat/cpu.h>
  25 #include <plat/mcbsp.h>
  26
  27 #include <mach/irqs.h>
  28
  29 #include "iomap.h"
  30
  31 #define DPS_RSTCT2_PER_EN       (1 << 0)
  32 #define DSP_RSTCT2_WD_PER_EN    (1 << 1)
  33
  34 static int dsp_use;
  35 static struct clk *api_clk;
  36 static struct clk *dsp_clk;
  37 static struct platform_device **omap_mcbsp_devices;
  38
  39 static void omap1_mcbsp_request(unsigned int id)
  40 {
  41         /*
  42          * On 1510, 1610 and 1710, McBSP1 and McBSP3
  43          * are DSP public peripherals.
  44          */
  45         if (id == 0 || id == 2) {
  46                 if (dsp_use++ == 0) {
  47                         api_clk = clk_get(NULL, "api_ck");
  48                         dsp_clk = clk_get(NULL, "dsp_ck");
  49                         if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
  50                                 clk_enable(api_clk);
  51                                 clk_enable(dsp_clk);
  52
  53                                 /*
  54                                  * DSP external peripheral reset
  55                                  * FIXME: This should be moved to dsp code
  56                                  */
  57                                 __raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
  58                                                 DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
  59                         }
  60                 }
  61         }
  62 }
  63
  64 static void omap1_mcbsp_free(unsigned int id)
  65 {
  66         if (id == 0 || id == 2) {
  67                 if (--dsp_use == 0) {
  68                         if (!IS_ERR(api_clk)) {
  69                                 clk_disable(api_clk);
  70                                 clk_put(api_clk);
  71                         }
  72                         if (!IS_ERR(dsp_clk)) {
  73                                 clk_disable(dsp_clk);
  74                                 clk_put(dsp_clk);
  75                         }
  76                 }
  77         }
  78 }
  79
  80 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
  81         .request        = omap1_mcbsp_request,
  82         .free           = omap1_mcbsp_free,
  83 };
  84
  85 #define OMAP7XX_MCBSP1_BASE     0xfffb1000
  86 #define OMAP7XX_MCBSP2_BASE     0xfffb1800
  87
  88 #define OMAP1510_MCBSP1_BASE    0xe1011800
  89 #define OMAP1510_MCBSP2_BASE    0xfffb1000
  90 #define OMAP1510_MCBSP3_BASE    0xe1017000
  91
  92 #define OMAP1610_MCBSP1_BASE    0xe1011800
  93 #define OMAP1610_MCBSP2_BASE    0xfffb1000
  94 #define OMAP1610_MCBSP3_BASE    0xe1017000
  95
  96 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
  97 struct resource omap7xx_mcbsp_res[][6] = {
  98         {
  99                 {
 100                         .start = OMAP7XX_MCBSP1_BASE,
 101                         .end   = OMAP7XX_MCBSP1_BASE + SZ_256,
 102                         .flags = IORESOURCE_MEM,
 103                 },
 104                 {
 105                         .name  = "rx",
 106                         .start = INT_7XX_McBSP1RX,
 107                         .flags = IORESOURCE_IRQ,
 108                 },
 109                 {
 110                         .name  = "tx",
 111                         .start = INT_7XX_McBSP1TX,
 112                         .flags = IORESOURCE_IRQ,
 113                 },
 114                 {
 115                         .name  = "rx",
 116                         .start = OMAP_DMA_MCBSP1_RX,
 117                         .flags = IORESOURCE_DMA,
 118                 },
 119                 {
 120                         .name  = "tx",
 121                         .start = OMAP_DMA_MCBSP1_TX,
 122                         .flags = IORESOURCE_DMA,
 123                 },
 124         },
 125         {
 126                 {
 127                         .start = OMAP7XX_MCBSP2_BASE,
 128                         .end   = OMAP7XX_MCBSP2_BASE + SZ_256,
 129                         .flags = IORESOURCE_MEM,
 130                 },
 131                 {
 132                         .name  = "rx",
 133                         .start = INT_7XX_McBSP2RX,
 134                         .flags = IORESOURCE_IRQ,
 135                 },
 136                 {
 137                         .name  = "tx",
 138                         .start = INT_7XX_McBSP2TX,
 139                         .flags = IORESOURCE_IRQ,
 140                 },
 141                 {
 142                         .name  = "rx",
 143                         .start = OMAP_DMA_MCBSP3_RX,
 144                         .flags = IORESOURCE_DMA,
 145                 },
 146                 {
 147                         .name  = "tx",
 148                         .start = OMAP_DMA_MCBSP3_TX,
 149                         .flags = IORESOURCE_DMA,
 150                 },
 151         },
 152 };
 153
 154 #define omap7xx_mcbsp_res_0             omap7xx_mcbsp_res[0]
 155
 156 static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = {
 157         {
 158                 .ops            = &omap1_mcbsp_ops,
 159         },
 160         {
 161                 .ops            = &omap1_mcbsp_ops,
 162         },
 163 };
 164 #define OMAP7XX_MCBSP_RES_SZ            ARRAY_SIZE(omap7xx_mcbsp_res[1])
 165 #define OMAP7XX_MCBSP_COUNT             ARRAY_SIZE(omap7xx_mcbsp_res)
 166 #else
 167 #define omap7xx_mcbsp_res_0             NULL
 168 #define omap7xx_mcbsp_pdata             NULL
 169 #define OMAP7XX_MCBSP_RES_SZ            0
 170 #define OMAP7XX_MCBSP_COUNT             0
 171 #endif
 172
 173 #ifdef CONFIG_ARCH_OMAP15XX
 174 struct resource omap15xx_mcbsp_res[][6] = {
 175         {
 176                 {
 177                         .start = OMAP1510_MCBSP1_BASE,
 178                         .end   = OMAP1510_MCBSP1_BASE + SZ_256,
 179                         .flags = IORESOURCE_MEM,
 180                 },
 181                 {
 182                         .name  = "rx",
 183                         .start = INT_McBSP1RX,
 184                         .flags = IORESOURCE_IRQ,
 185                 },
 186                 {
 187                         .name  = "tx",
 188                         .start = INT_McBSP1TX,
 189                         .flags = IORESOURCE_IRQ,
 190                 },
 191                 {
 192                         .name  = "rx",
 193                         .start = OMAP_DMA_MCBSP1_RX,
 194                         .flags = IORESOURCE_DMA,
 195                 },
 196                 {
 197                         .name  = "tx",
 198                         .start = OMAP_DMA_MCBSP1_TX,
 199                         .flags = IORESOURCE_DMA,
 200                 },
 201         },
 202         {
 203                 {
 204                         .start = OMAP1510_MCBSP2_BASE,
 205                         .end   = OMAP1510_MCBSP2_BASE + SZ_256,
 206                         .flags = IORESOURCE_MEM,
 207                 },
 208                 {
 209                         .name  = "rx",
 210                         .start = INT_1510_SPI_RX,
 211                         .flags = IORESOURCE_IRQ,
 212                 },
 213                 {
 214                         .name  = "tx",
 215                         .start = INT_1510_SPI_TX,
 216                         .flags = IORESOURCE_IRQ,
 217                 },
 218                 {
 219                         .name  = "rx",
 220                         .start = OMAP_DMA_MCBSP2_RX,
 221                         .flags = IORESOURCE_DMA,
 222                 },
 223                 {
 224                         .name  = "tx",
 225                         .start = OMAP_DMA_MCBSP2_TX,
 226                         .flags = IORESOURCE_DMA,
 227                 },
 228         },
 229         {
 230                 {
 231                         .start = OMAP1510_MCBSP3_BASE,
 232                         .end   = OMAP1510_MCBSP3_BASE + SZ_256,
 233                         .flags = IORESOURCE_MEM,
 234                 },
 235                 {
 236                         .name  = "rx",
 237                         .start = INT_McBSP3RX,
 238                         .flags = IORESOURCE_IRQ,
 239                 },
 240                 {
 241                         .name  = "tx",
 242                         .start = INT_McBSP3TX,
 243                         .flags = IORESOURCE_IRQ,
 244                 },
 245                 {
 246                         .name  = "rx",
 247                         .start = OMAP_DMA_MCBSP3_RX,
 248                         .flags = IORESOURCE_DMA,
 249                 },
 250                 {
 251                         .name  = "tx",
 252                         .start = OMAP_DMA_MCBSP3_TX,
 253                         .flags = IORESOURCE_DMA,
 254                 },
 255         },
 256 };
 257
 258 #define omap15xx_mcbsp_res_0            omap15xx_mcbsp_res[0]
 259
 260 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 261         {
 262                 .ops            = &omap1_mcbsp_ops,
 263         },
 264         {
 265                 .ops            = &omap1_mcbsp_ops,
 266         },
 267         {
 268                 .ops            = &omap1_mcbsp_ops,
 269         },
 270 };
 271 #define OMAP15XX_MCBSP_RES_SZ           ARRAY_SIZE(omap15xx_mcbsp_res[1])
 272 #define OMAP15XX_MCBSP_COUNT            ARRAY_SIZE(omap15xx_mcbsp_res)
 273 #else
 274 #define omap15xx_mcbsp_res_0            NULL
 275 #define omap15xx_mcbsp_pdata            NULL
 276 #define OMAP15XX_MCBSP_RES_SZ           0
 277 #define OMAP15XX_MCBSP_COUNT            0
 278 #endif
 279
 280 #ifdef CONFIG_ARCH_OMAP16XX
 281 struct resource omap16xx_mcbsp_res[][6] = {
 282         {
 283                 {
 284                         .start = OMAP1610_MCBSP1_BASE,
 285                         .end   = OMAP1610_MCBSP1_BASE + SZ_256,
 286                         .flags = IORESOURCE_MEM,
 287                 },
 288                 {
 289                         .name  = "rx",
 290                         .start = INT_McBSP1RX,
 291                         .flags = IORESOURCE_IRQ,
 292                 },
 293                 {
 294                         .name  = "tx",
 295                         .start = INT_McBSP1TX,
 296                         .flags = IORESOURCE_IRQ,
 297                 },
 298                 {
 299                         .name  = "rx",
 300                         .start = OMAP_DMA_MCBSP1_RX,
 301                         .flags = IORESOURCE_DMA,
 302                 },
 303                 {
 304                         .name  = "tx",
 305                         .start = OMAP_DMA_MCBSP1_TX,
 306                         .flags = IORESOURCE_DMA,
 307                 },
 308         },
 309         {
 310                 {
 311                         .start = OMAP1610_MCBSP2_BASE,
 312                         .end   = OMAP1610_MCBSP2_BASE + SZ_256,
 313                         .flags = IORESOURCE_MEM,
 314                 },
 315                 {
 316                         .name  = "rx",
 317                         .start = INT_1610_McBSP2_RX,
 318                         .flags = IORESOURCE_IRQ,
 319                 },
 320                 {
 321                         .name  = "tx",
 322                         .start = INT_1610_McBSP2_TX,
 323                         .flags = IORESOURCE_IRQ,
 324                 },
 325                 {
 326                         .name  = "rx",
 327                         .start = OMAP_DMA_MCBSP2_RX,
 328                         .flags = IORESOURCE_DMA,
 329                 },
 330                 {
 331                         .name  = "tx",
 332                         .start = OMAP_DMA_MCBSP2_TX,
 333                         .flags = IORESOURCE_DMA,
 334                 },
 335         },
 336         {
 337                 {
 338                         .start = OMAP1610_MCBSP3_BASE,
 339                         .end   = OMAP1610_MCBSP3_BASE + SZ_256,
 340                         .flags = IORESOURCE_MEM,
 341                 },
 342                 {
 343                         .name  = "rx",
 344                         .start = INT_McBSP3RX,
 345                         .flags = IORESOURCE_IRQ,
 346                 },
 347                 {
 348                         .name  = "tx",
 349                         .start = INT_McBSP3TX,
 350                         .flags = IORESOURCE_IRQ,
 351                 },
 352                 {
 353                         .name  = "rx",
 354                         .start = OMAP_DMA_MCBSP3_RX,
 355                         .flags = IORESOURCE_DMA,
 356                 },
 357                 {
 358                         .name  = "tx",
 359                         .start = OMAP_DMA_MCBSP3_TX,
 360                         .flags = IORESOURCE_DMA,
 361                 },
 362         },
 363 };
 364
 365 #define omap16xx_mcbsp_res_0            omap16xx_mcbsp_res[0]
 366
 367 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 368         {
 369                 .ops            = &omap1_mcbsp_ops,
 370         },
 371         {
 372                 .ops            = &omap1_mcbsp_ops,
 373         },
 374         {
 375                 .ops            = &omap1_mcbsp_ops,
 376         },
 377 };
 378 #define OMAP16XX_MCBSP_RES_SZ           ARRAY_SIZE(omap16xx_mcbsp_res[1])
 379 #define OMAP16XX_MCBSP_COUNT            ARRAY_SIZE(omap16xx_mcbsp_res)
 380 #else
 381 #define omap16xx_mcbsp_res_0            NULL
 382 #define omap16xx_mcbsp_pdata            NULL
 383 #define OMAP16XX_MCBSP_RES_SZ           0
 384 #define OMAP16XX_MCBSP_COUNT            0
 385 #endif
 386
 387 static void omap_mcbsp_register_board_cfg(struct resource *res, int res_count,
 388                         struct omap_mcbsp_platform_data *config, int size)
 389 {
 390         int i;
 391
 392         omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *),
 393                                      GFP_KERNEL);
 394         if (!omap_mcbsp_devices) {
 395                 printk(KERN_ERR "Could not register McBSP devices\n");
 396                 return;
 397         }
 398
 399         for (i = 0; i < size; i++) {
 400                 struct platform_device *new_mcbsp;
 401                 int ret;
 402
 403                 new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1);
 404                 if (!new_mcbsp)
 405                         continue;
 406                 platform_device_add_resources(new_mcbsp, &res[i * res_count],
 407                                         res_count);
 408                 config[i].reg_size = 2;
 409                 config[i].reg_step = 2;
 410                 new_mcbsp->dev.platform_data = &config[i];
 411                 ret = platform_device_add(new_mcbsp);
 412                 if (ret) {
 413                         platform_device_put(new_mcbsp);
 414                         continue;
 415                 }
 416                 omap_mcbsp_devices[i] = new_mcbsp;
 417         }
 418 }
 419
 420 static int __init omap1_mcbsp_init(void)
 421 {
 422         if (!cpu_class_is_omap1())
 423                 return -ENODEV;
 424
 425         if (cpu_is_omap7xx())
 426                 omap_mcbsp_register_board_cfg(omap7xx_mcbsp_res_0,
 427                                         OMAP7XX_MCBSP_RES_SZ,
 428                                         omap7xx_mcbsp_pdata,
 429                                         OMAP7XX_MCBSP_COUNT);
 430
 431         if (cpu_is_omap15xx())
 432                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_res_0,
 433                                         OMAP15XX_MCBSP_RES_SZ,
 434                                         omap15xx_mcbsp_pdata,
 435                                         OMAP15XX_MCBSP_COUNT);
 436
 437         if (cpu_is_omap16xx())
 438                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_res_0,
 439                                         OMAP16XX_MCBSP_RES_SZ,
 440                                         omap16xx_mcbsp_pdata,
 441                                         OMAP16XX_MCBSP_COUNT);
 442
 443         return 0;
 444 }
 445
 446 arch_initcall(omap1_mcbsp_init);