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