target/linux/rb532-2.6/patches/120-cf.patch

   1 diff -urN linux.old/drivers/block/Kconfig linux.dev/drivers/block/Kconfig
   2 --- linux.old/drivers/block/Kconfig     2006-10-26 02:43:39.000000000 +0200
   3 +++ linux.dev/drivers/block/Kconfig     2006-10-26 00:11:14.000000000 +0200
   4 @@ -456,4 +456,12 @@
   5         This driver provides Support for ATA over Ethernet block
   6         devices like the Coraid EtherDrive (R) Storage Blade.
   7
   8 +config BLK_DEV_CF_MIPS
   9 +       bool "CF slot of RB532 board"
  10 +       depends on MIKROTIK_RB500
  11 +       default y
  12 +       help
  13 +         The Routerboard 532 has a CF slot on it. Enable the special block
  14 +         device driver for it.
  15 +
  16  endmenu
  17 diff -urN linux.old/drivers/block/Makefile linux.dev/drivers/block/Makefile
  18 --- linux.old/drivers/block/Makefile    2006-06-18 03:49:35.000000000 +0200
  19 +++ linux.dev/drivers/block/Makefile    2006-10-26 02:44:10.000000000 +0200
  20 @@ -29,4 +29,5 @@
  21  obj-$(CONFIG_VIODASD)          += viodasd.o
  22  obj-$(CONFIG_BLK_DEV_SX8)      += sx8.o
  23  obj-$(CONFIG_BLK_DEV_UB)       += ub.o
  24 +obj-$(CONFIG_BLK_DEV_CF_MIPS)  += rb500/
  25
  26 diff -urN linux.old/drivers/block/rb500/ata.c linux.dev/drivers/block/rb500/ata.c
  27 --- linux.old/drivers/block/rb500/ata.c 1970-01-01 01:00:00.000000000 +0100
  28 +++ linux.dev/drivers/block/rb500/ata.c 2006-10-26 00:11:14.000000000 +0200
  29 @@ -0,0 +1,485 @@
  30 +/* CF-mips driver
  31 +   This is a block driver for the direct (mmaped) interface to the CF-slot,
  32 +   found in Routerboard.com's RB532 board
  33 +   See SDK provided from routerboard.com.
  34 +
  35 +   Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
  36 +   Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
  37 +
  38 +   This work is redistributed under the terms of the GNU General Public License.
  39 +*/
  40 +
  41 +#include <linux/kernel.h>      /* printk() */
  42 +#include <linux/module.h>      /* module to be loadable */
  43 +#include <linux/delay.h>
  44 +#include <linux/sched.h>
  45 +#include <linux/pci.h>
  46 +#include <linux/ioport.h>      /* request_mem_region() */
  47 +#include <asm/unaligned.h>             /* ioremap() */
  48 +#include <asm/io.h>            /* ioremap() */
  49 +#include <asm/rc32434/rb.h>
  50 +
  51 +#include "ata.h"
  52 +
  53 +#define REQUEST_MEM_REGION 0
  54 +#define DEBUG 1
  55 +
  56 +#if DEBUG
  57 +#define DEBUGP printk
  58 +#else
  59 +#define DEBUGP(format, args...)
  60 +#endif
  61 +
  62 +#define SECS   1000000         /* unit for wait_not_busy() is 1us */
  63 +
  64 +unsigned cf_head = 0;
  65 +unsigned cf_cyl = 0;
  66 +unsigned cf_spt = 0;
  67 +unsigned cf_sectors = 0;
  68 +static unsigned cf_block_size = 1;
  69 +static void *baddr = 0;
  70 +
  71 +#define DBUF32 ((volatile u32 *)((unsigned long)dev->baddr | ATA_DBUF_OFFSET))
  72 +
  73 +
  74 +static void cf_do_tasklet(unsigned long dev_l);
  75 +
  76 +
  77 +static inline void wareg(u8 val, unsigned reg, struct cf_mips_dev* dev)
  78 +{
  79 +       writeb(val, dev->baddr + ATA_REG_OFFSET + reg);
  80 +}
  81 +
  82 +static inline u8 rareg(unsigned reg, struct cf_mips_dev* dev)
  83 +{
  84 +       return readb(dev->baddr + ATA_REG_OFFSET + reg);
  85 +}
  86 +
  87 +static inline int get_gpio_bit(gpio_func ofs, struct cf_mips_dev *dev)
  88 +{
  89 +       return (gpio_get(ofs) >> dev->pin) & 1;
  90 +}
  91 +
  92 +static inline void set_gpio_bit(int bit, gpio_func ofs, struct cf_mips_dev *dev)
  93 +{
  94 +       gpio_set(ofs, (1 << dev->pin), ((bit & 1) << dev->pin));
  95 +}
  96 +
  97 +static inline int cfrdy(struct cf_mips_dev *dev)
  98 +{
  99 +       return get_gpio_bit(DATA, dev);
 100 +}
 101 +
 102 +static inline void prepare_cf_irq(struct cf_mips_dev *dev)
 103 +{
 104 +       set_gpio_bit(1, ILEVEL, dev);   /* interrupt on cf ready (not busy) */
 105 +       set_gpio_bit(0, ISTAT, dev);    /* clear interrupt status */
 106 +}
 107 +
 108 +static inline int cf_present(struct cf_mips_dev* dev)
 109 +{
 110 +       /* TODO: read and configure CIS into memory mapped mode
 111 +        * TODO:   parse CISTPL_CONFIG on CF+ cards to get base address (0x200)
 112 +        * TODO:   maybe adjust power saving setting for Hitachi Microdrive
 113 +        */
 114 +       int i;
 115 +
 116 +       /* setup CFRDY GPIO as input */
 117 +       set_gpio_bit(0, FUNC, dev);
 118 +       set_gpio_bit(0, CFG, dev);
 119 +
 120 +       for (i = 0; i < 0x10; ++i) {
 121 +               if (rareg(i,dev) != 0xff)
 122 +                       return 1;
 123 +       }
 124 +       return 0;
 125 +}
 126 +
 127 +static inline int is_busy(struct cf_mips_dev *dev)
 128 +{
 129 +       return !cfrdy(dev);
 130 +}
 131 +
 132 +static int wait_not_busy(int to_us, int wait_for_busy,struct cf_mips_dev *dev)
 133 +{
 134 +       int us_passed = 0;
 135 +       if (wait_for_busy && !is_busy(dev)) {
 136 +               /* busy must appear within 400ns,
 137 +                * but it may dissapear before we see it
 138 +                *  => must not wait for busy in a loop
 139 +                */
 140 +               ndelay(400);
 141 +       }
 142 +
 143 +       do {
 144 +               if (us_passed)
 145 +                       udelay(1);      /* never reached in async mode */
 146 +               if (!is_busy(dev)) {
 147 +                       if (us_passed > 1 * SECS) {
 148 +                               printk(KERN_WARNING "cf-mips:   not busy ok (after %dus)"
 149 +                                      ", status 0x%02x\n", us_passed, (unsigned) rareg(ATA_REG_ST,dev));
 150 +                       }
 151 +                       return CF_TRANS_OK;
 152 +               }
 153 +               if (us_passed == 1 * SECS) {
 154 +                       printk(KERN_WARNING "cf-mips: wait not busy %dus..\n", to_us);
 155 +               }
 156 +               if (dev->async_mode) {
 157 +                       dev->to_timer.expires = jiffies + (to_us * HZ / SECS);
 158 +                       dev->irq_enable_time = jiffies;
 159 +                       prepare_cf_irq(dev);
 160 +                       if (is_busy(dev)) {
 161 +                               add_timer(&dev->to_timer);
 162 +                               enable_irq(dev->irq);
 163 +                               return CF_TRANS_IN_PROGRESS;
 164 +                       }
 165 +                       continue;
 166 +               }
 167 +               ++us_passed;
 168 +       } while (us_passed < to_us);
 169 +
 170 +       printk(KERN_ERR "cf-mips:  wait not busy timeout (%dus)"
 171 +              ", status 0x%02x, state %d\n",
 172 +              to_us, (unsigned) rareg(ATA_REG_ST,dev), dev->tstate);
 173 +       return CF_TRANS_FAILED;
 174 +}
 175 +
 176 +static irqreturn_t cf_irq_handler(int irq, void *dev_id)
 177 +{
 178 +       /* While tasklet has not disabled irq, irq will be retried all the time
 179 +        * because of ILEVEL matching GPIO pin status => deadlock.
 180 +        * To avoid this, we change ILEVEL to 0.
 181 +        */
 182 +       struct cf_mips_dev *dev=dev_id;
 183 +
 184 +       set_gpio_bit(0, ILEVEL, dev);
 185 +       set_gpio_bit(0, ISTAT, dev);
 186 +
 187 +       del_timer(&dev->to_timer);
 188 +       tasklet_schedule(&dev->tasklet);
 189 +       return IRQ_HANDLED;
 190 +}
 191 +
 192 +static int do_reset(struct cf_mips_dev *dev)
 193 +{
 194 +       printk(KERN_INFO "cf-mips: resetting..\n");
 195 +
 196 +       wareg(ATA_REG_DC_SRST, ATA_REG_DC,dev);
 197 +       udelay(1);              /* FIXME: how long should we wait here? */
 198 +       wareg(0, ATA_REG_DC,dev);
 199 +
 200 +       return wait_not_busy(30 * SECS, 1,dev);
 201 +}
 202 +
 203 +static int set_multiple(struct cf_mips_dev *dev)
 204 +{
 205 +       if (dev->block_size <= 1)
 206 +               return CF_TRANS_OK;
 207 +
 208 +       wareg(dev->block_size, ATA_REG_SC,dev);
 209 +       wareg(ATA_REG_DH_BASE | ATA_REG_DH_LBA, ATA_REG_DH,dev);
 210 +       wareg(ATA_CMD_SET_MULTIPLE, ATA_REG_CMD,dev);
 211 +
 212 +       return wait_not_busy(10 * SECS, 1,dev);
 213 +}
 214 +
 215 +static int set_cmd(struct cf_mips_dev *dev)
 216 +{
 217 +       //DEBUGP(KERN_INFO "cf-mips: ata cmd 0x%02x\n", dev->tcmd);
 218 +       // sector_count should be <=24 bits..
 219 +       BUG_ON(dev->tsect_start>=0x10000000);
 220 +       // This way, it addresses 2^24 * 512 = 128G
 221 +
 222 +       if (dev->tsector_count) {
 223 +               wareg(dev->tsector_count & 0xff, ATA_REG_SC,dev);
 224 +               wareg(dev->tsect_start & 0xff, ATA_REG_SN,dev);
 225 +               wareg((dev->tsect_start >> 8) & 0xff, ATA_REG_CL,dev);
 226 +               wareg((dev->tsect_start >> 16) & 0xff, ATA_REG_CH,dev);
 227 +       }
 228 +       wareg(((dev->tsect_start >> 24) & 0x0f) | ATA_REG_DH_BASE | ATA_REG_DH_LBA,
 229 +             ATA_REG_DH,dev);  /* select drive on all commands */
 230 +       wareg(dev->tcmd, ATA_REG_CMD,dev);
 231 +       return wait_not_busy(10 * SECS, 1,dev);
 232 +}
 233 +
 234 +static int do_trans(struct cf_mips_dev *dev)
 235 +{
 236 +       int res;
 237 +       unsigned st;
 238 +       int transfered;
 239 +
 240 +       //printk("do_trans: %d sectors left\n",dev->tsectors_left);
 241 +       while (dev->tsectors_left) {
 242 +               transfered = 0;
 243 +
 244 +               st = rareg(ATA_REG_ST,dev);
 245 +               if (!(st & ATA_REG_ST_DRQ)) {
 246 +                       printk(KERN_ERR "cf-mips: do_trans without DRQ (status 0x%x)!\n", st);
 247 +                       if (st & ATA_REG_ST_ERR) {
 248 +                               int errId = rareg(ATA_REG_ERR,dev);
 249 +                               printk(KERN_ERR "cf-mips: %s error, status 0x%x, errid 0x%x\n",
 250 +                                      (dev->tread ? "read" : "write"), st, errId);
 251 +                       }
 252 +                       return CF_TRANS_FAILED;
 253 +               }
 254 +               do { /* Fill/read the buffer one block */
 255 +                       u32 *qbuf, *qend;
 256 +                       qbuf = (u32 *)dev->tbuf;
 257 +                       qend = qbuf + CF_SECT_SIZE / sizeof(u32);
 258 +                       if (dev->tread) {
 259 +                           while (qbuf!=qend)
 260 +                               put_unaligned(*DBUF32,qbuf++);
 261 +                               //*(qbuf++) = *DBUF32;
 262 +                       }
 263 +                       else {
 264 +                           while(qbuf!=qend)
 265 +                               *DBUF32 = get_unaligned(qbuf++);
 266 +                       }
 267 +
 268 +                       dev->tsectors_left--;
 269 +                       dev->tbuf += CF_SECT_SIZE;
 270 +                       dev->tbuf_size -= CF_SECT_SIZE;
 271 +                       transfered++;
 272 +               } while (transfered != dev->block_size && dev->tsectors_left > 0);
 273 +
 274 +               res = wait_not_busy(10 * SECS, 1,dev);
 275 +               if (res != CF_TRANS_OK)
 276 +                       return res;
 277 +       };
 278 +
 279 +       st = rareg(ATA_REG_ST,dev);
 280 +       if (st & (ATA_REG_ST_DRQ | ATA_REG_ST_DWF | ATA_REG_ST_ERR)) {
 281 +               if (st & ATA_REG_ST_DRQ) {
 282 +                       printk(KERN_ERR "cf-mips: DRQ after all %d sectors are %s"
 283 +                              ", status 0x%x\n", dev->tsector_count, (dev->tread ? "read" : "written"), st);
 284 +               } else if (st & ATA_REG_ST_DWF) {
 285 +                       printk(KERN_ERR "cf-mips: write fault, status 0x%x\n", st);
 286 +               } else {
 287 +                       int errId = rareg(ATA_REG_ERR,dev);
 288 +                       printk(KERN_ERR "cf-mips: %s error, status 0x%x, errid 0x%x\n",
 289 +                              (dev->tread ? "read" : "write"), st, errId);
 290 +               }
 291 +               return CF_TRANS_FAILED;
 292 +       }
 293 +       return CF_TRANS_OK;
 294 +}
 295 +
 296 +static int cf_do_state(struct cf_mips_dev *dev)
 297 +{
 298 +       int res;
 299 +       switch (dev->tstate) {  /* fall through everywhere */
 300 +       case TS_IDLE:
 301 +               dev->tstate = TS_READY;
 302 +               if (is_busy(dev)) {
 303 +                       dev->tstate = TS_AFTER_RESET;
 304 +                       res = do_reset(dev);
 305 +                       if (res != CF_TRANS_OK)
 306 +                               break;
 307 +               }
 308 +       case TS_AFTER_RESET:
 309 +               if (dev->tstate == TS_AFTER_RESET) {
 310 +                       dev->tstate = TS_READY;
 311 +                       res = set_multiple(dev);
 312 +                       if (res != CF_TRANS_OK)
 313 +                               break;
 314 +               }
 315 +       case TS_READY:
 316 +               dev->tstate = TS_CMD;
 317 +               res = set_cmd(dev);
 318 +               if (res != CF_TRANS_OK)
 319 +                       break;;
 320 +       case TS_CMD:
 321 +               dev->tstate = TS_TRANS;
 322 +       case TS_TRANS:
 323 +               res = do_trans(dev);
 324 +               break;
 325 +       default:
 326 +               printk(KERN_ERR "cf-mips: BUG: unknown tstate %d\n", dev->tstate);
 327 +               return CF_TRANS_FAILED;
 328 +       }
 329 +       if (res != CF_TRANS_IN_PROGRESS)
 330 +               dev->tstate = TS_IDLE;
 331 +       return res;
 332 +}
 333 +
 334 +static void cf_do_tasklet(unsigned long dev_l)
 335 +{
 336 +       struct cf_mips_dev* dev=(struct cf_mips_dev*) dev_l;
 337 +       int res;
 338 +
 339 +       disable_irq(dev->irq);
 340 +
 341 +       if (dev->tstate == TS_IDLE)
 342 +               return;         /* can happen when irq is first registered */
 343 +
 344 +#if 0
 345 +       DEBUGP(KERN_WARNING "cf-mips:   not busy ok (tasklet)  status 0x%02x\n",
 346 +              (unsigned) rareg(ATA_REG_ST,dev));
 347 +#endif
 348 +
 349 +       res = cf_do_state(dev);
 350 +       if (res == CF_TRANS_IN_PROGRESS)
 351 +               return;
 352 +       cf_async_trans_done(dev,res);
 353 +}
 354 +
 355 +static void cf_async_timeout(unsigned long dev_l)
 356 +{
 357 +       struct cf_mips_dev* dev=(struct cf_mips_dev*) dev_l;
 358 +       disable_irq(dev->irq);
 359 +       /* Perhaps send abort to the device? */
 360 +       printk(KERN_ERR "cf-mips:  wait not busy timeout (%lus)"
 361 +              ", status 0x%02x, state %d\n",
 362 +              jiffies - dev->irq_enable_time, (unsigned) rareg(ATA_REG_ST,dev), dev->tstate);
 363 +       dev->tstate = TS_IDLE;
 364 +       cf_async_trans_done(dev,CF_TRANS_FAILED);
 365 +}
 366 +
 367 +int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect,
 368 +       char* buffer, int is_write)
 369 +{
 370 +       BUG_ON(dev->tstate!=TS_IDLE);
 371 +       if (nsect > ATA_MAX_SECT_PER_CMD) {
 372 +               printk(KERN_WARNING "cf-mips: sector count %lu out of range\n",nsect);
 373 +               return CF_TRANS_FAILED;
 374 +       }
 375 +       if (sector + nsect > dev->sectors) {
 376 +               printk(KERN_WARNING "cf-mips: sector %lu out of range\n",sector);
 377 +               return CF_TRANS_FAILED;
 378 +       }
 379 +       dev->tbuf = buffer;
 380 +       dev->tbuf_size = nsect*512;
 381 +       dev->tsect_start = sector;
 382 +       dev->tsector_count = nsect;
 383 +       dev->tsectors_left = dev->tsector_count;
 384 +       dev->tread = (is_write)?0:1;
 385 +
 386 +       dev->tcmd = (dev->block_size == 1 ?
 387 +               (is_write ? ATA_CMD_WRITE_SECTORS : ATA_CMD_READ_SECTORS) :
 388 +               (is_write ? ATA_CMD_WRITE_MULTIPLE : ATA_CMD_READ_MULTIPLE));
 389 +
 390 +       return cf_do_state(dev);
 391 +}
 392 +
 393 +static int do_identify(struct cf_mips_dev *dev)
 394 +{
 395 +       u16 sbuf[CF_SECT_SIZE >> 1];
 396 +       int res;
 397 +       char tstr[17]; //serial
 398 +       BUG_ON(dev->tstate!=TS_IDLE);
 399 +       dev->tbuf = (char *) sbuf;
 400 +       dev->tbuf_size = CF_SECT_SIZE;
 401 +       dev->tsect_start = 0;
 402 +       dev->tsector_count = 0;
 403 +       dev->tsectors_left = 1;
 404 +       dev->tread = 1;
 405 +       dev->tcmd = ATA_CMD_IDENTIFY_DRIVE;
 406 +
 407 +       DEBUGP(KERN_INFO "cf-mips: identify drive..\n");
 408 +       res = cf_do_state(dev);
 409 +       if (res == CF_TRANS_IN_PROGRESS) {
 410 +               printk(KERN_ERR "cf-mips: BUG: async identify cmd\n");
 411 +               return CF_TRANS_FAILED;
 412 +       }
 413 +       if (res != CF_TRANS_OK)
 414 +               return 0;
 415 +
 416 +       dev->head = sbuf[3];
 417 +       dev->cyl = sbuf[1];
 418 +       dev->spt = sbuf[6];
 419 +       dev->sectors = ((unsigned long) sbuf[7] << 16) | sbuf[8];
 420 +       dev->dtype=sbuf[0];
 421 +       memcpy(tstr,&sbuf[12],16);
 422 +       tstr[16]=0;
 423 +       printk(KERN_INFO "cf-mips: %s detected, C/H/S=%d/%d/%d sectors=%u (%uMB) Serial=%s\n",
 424 +              (sbuf[0] == 0x848A ? "CF card" : "ATA drive"), dev->cyl, dev->head,
 425 +              dev->spt, dev->sectors, dev->sectors >> 11,tstr);
 426 +       return 1;
 427 +}
 428 +
 429 +static void init_multiple(struct cf_mips_dev * dev)
 430 +{
 431 +       int res;
 432 +       DEBUGP(KERN_INFO "cf-mips: detecting block size\n");
 433 +
 434 +       dev->block_size = 128;  /* max block size = 128 sectors (64KB) */
 435 +       do {
 436 +               wareg(dev->block_size, ATA_REG_SC,dev);
 437 +               wareg(ATA_REG_DH_BASE | ATA_REG_DH_LBA, ATA_REG_DH,dev);
 438 +               wareg(ATA_CMD_SET_MULTIPLE, ATA_REG_CMD,dev);
 439 +
 440 +               res = wait_not_busy(10 * SECS, 1,dev);
 441 +               if (res != CF_TRANS_OK) {
 442 +                       printk(KERN_ERR "cf-mips: failed to detect block size: busy!\n");
 443 +                       dev->block_size = 1;
 444 +                       return;
 445 +               }
 446 +               if ((rareg(ATA_REG_ST,dev) & ATA_REG_ST_ERR) == 0)
 447 +                       break;
 448 +               dev->block_size /= 2;
 449 +       } while (dev->block_size > 1);
 450 +
 451 +       printk(KERN_INFO "cf-mips: multiple sectors = %d\n", dev->block_size);
 452 +}
 453 +
 454 +int cf_init(struct cf_mips_dev *dev)
 455 +{
 456 +       tasklet_init(&dev->tasklet,cf_do_tasklet,(unsigned long)dev);
 457 +       dev->baddr = ioremap_nocache((unsigned long)dev->base, CFDEV_BUF_SIZE);
 458 +       if (!dev->baddr) {
 459 +               printk(KERN_ERR "cf-mips: cf_init: ioremap for (%lx,%x) failed\n",
 460 +                      (unsigned long) dev->base, CFDEV_BUF_SIZE);
 461 +               return -EBUSY;
 462 +       }
 463 +
 464 +       if (!cf_present(dev)) {
 465 +               printk(KERN_WARNING "cf-mips: cf card not present\n");
 466 +               iounmap(dev->baddr);
 467 +               return -ENODEV;
 468 +       }
 469 +
 470 +       if (do_reset(dev) != CF_TRANS_OK) {
 471 +               printk(KERN_ERR "cf-mips: cf reset failed\n");
 472 +               iounmap(dev->baddr);
 473 +               return -EBUSY;
 474 +       }
 475 +
 476 +       if (!do_identify(dev)) {
 477 +               printk(KERN_ERR "cf-mips: cf identify failed\n");
 478 +               iounmap(dev->baddr);
 479 +               return -EBUSY;
 480 +       }
 481 +
 482 +/*     set_apm_level(ATA_APM_WITH_STANDBY); */
 483 +       init_multiple(dev);
 484 +
 485 +       init_timer(&dev->to_timer);
 486 +       dev->to_timer.function = cf_async_timeout;
 487 +       dev->to_timer.data = (unsigned long)dev;
 488 +
 489 +       prepare_cf_irq(dev);
 490 +       if (request_irq(dev->irq, cf_irq_handler, 0, "CF Mips", dev)) {
 491 +               printk(KERN_ERR "cf-mips: failed to get irq\n");
 492 +               iounmap(dev->baddr);
 493 +               return -EBUSY;
 494 +       }
 495 +       /* Disable below would be odd, because request will enable, and the tasklet
 496 +         will disable it itself */
 497 +       //disable_irq(dev->irq);
 498 +
 499 +       dev->async_mode = 1;
 500 +
 501 +       return 0;
 502 +}
 503 +
 504 +void cf_cleanup(struct cf_mips_dev *dev)
 505 +{
 506 +       iounmap(dev->baddr);
 507 +       free_irq(dev->irq, NULL);
 508 +#if REQUEST_MEM_REGION
 509 +       release_mem_region((unsigned long)dev->base, CFDEV_BUF_SIZE);
 510 +#endif
 511 +}
 512 +
 513 +
 514 +/*eof*/
 515 diff -urN linux.old/drivers/block/rb500/ata.h linux.dev/drivers/block/rb500/ata.h
 516 --- linux.old/drivers/block/rb500/ata.h 1970-01-01 01:00:00.000000000 +0100
 517 +++ linux.dev/drivers/block/rb500/ata.h 2006-10-26 00:11:14.000000000 +0200
 518 @@ -0,0 +1,143 @@
 519 +/* CF-mips driver
 520 +   This is a block driver for the direct (mmaped) interface to the CF-slot,
 521 +   found in Routerboard.com's RB532 board
 522 +   See SDK provided from routerboard.com.
 523 +
 524 +   Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
 525 +   Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
 526 +
 527 +   This work is redistributed under the terms of the GNU General Public License.
 528 +*/
 529 +
 530 +#ifndef __CFMIPS_ATA_H__
 531 +#define __CFMIPS_ATA_H__
 532 +
 533 +#include <linux/interrupt.h>
 534 +
 535 +#define CFG_DC_DEV1    (void*)0xb8010010
 536 +#define   CFG_DC_DEVBASE       0x0
 537 +#define   CFG_DC_DEVMASK       0x4
 538 +#define   CFG_DC_DEVC          0x8
 539 +#define   CFG_DC_DEVTC         0xC
 540 +
 541 +#define CFDEV_BUF_SIZE 0x1000
 542 +#define ATA_CIS_OFFSET 0x200
 543 +#define ATA_REG_OFFSET 0x800
 544 +#define ATA_DBUF_OFFSET        0xC00
 545 +
 546 +#define ATA_REG_FEAT   0x1
 547 +#define ATA_REG_SC     0x2
 548 +#define ATA_REG_SN     0x3
 549 +#define ATA_REG_CL     0x4
 550 +#define ATA_REG_CH     0x5
 551 +#define ATA_REG_DH     0x6
 552 +#define   ATA_REG_DH_BASE      0xa0
 553 +#define   ATA_REG_DH_LBA       0x40
 554 +#define   ATA_REG_DH_DRV       0x10
 555 +#define ATA_REG_CMD    0x7
 556 +#define ATA_REG_ST     0x7
 557 +#define   ATA_REG_ST_BUSY      0x80
 558 +#define   ATA_REG_ST_RDY       0x40
 559 +#define   ATA_REG_ST_DWF       0x20
 560 +#define   ATA_REG_ST_DSC       0x10
 561 +#define   ATA_REG_ST_DRQ       0x08
 562 +#define   ATA_REG_ST_CORR      0x04
 563 +#define   ATA_REG_ST_ERR       0x01
 564 +#define ATA_REG_ERR    0xd
 565 +#define ATA_REG_DC     0xe
 566 +#define   ATA_REG_DC_IEN       0x02
 567 +#define   ATA_REG_DC_SRST      0x04
 568 +
 569 +#define ATA_CMD_READ_SECTORS   0x20
 570 +#define ATA_CMD_WRITE_SECTORS  0x30
 571 +#define ATA_CMD_EXEC_DRIVE_DIAG        0x90
 572 +#define ATA_CMD_READ_MULTIPLE  0xC4
 573 +#define ATA_CMD_WRITE_MULTIPLE 0xC5
 574 +#define ATA_CMD_SET_MULTIPLE   0xC6
 575 +#define ATA_CMD_IDENTIFY_DRIVE 0xEC
 576 +#define ATA_CMD_SET_FEATURES   0xEF
 577 +
 578 +#define ATA_FEATURE_ENABLE_APM 0x05
 579 +#define ATA_FEATURE_DISABLE_APM        0x85
 580 +#define ATA_APM_DISABLED       0x00
 581 +#define ATA_APM_MIN_POWER      0x01
 582 +#define ATA_APM_WITH_STANDBY   0x7f
 583 +#define ATA_APM_WITHOUT_STANDBY        0x80
 584 +#define ATA_APM_MAX_PERFORMANCE        0xfe
 585 +
 586 +#define CF_SECT_SIZE   0x200
 587 +/* That is the ratio CF_SECT_SIZE/512 (the kernel sector size) */
 588 +#define CF_KERNEL_MUL  1
 589 +#define ATA_MAX_SECT_PER_CMD   0x100
 590 +
 591 +#define CF_TRANS_FAILED                0
 592 +#define CF_TRANS_OK            1
 593 +#define CF_TRANS_IN_PROGRESS   2
 594 +
 595 +
 596 +enum trans_state {
 597 +       TS_IDLE = 0,
 598 +       TS_AFTER_RESET,
 599 +       TS_READY,
 600 +       TS_CMD,
 601 +       TS_TRANS
 602 +};
 603 +
 604 +//
 605 +// #if DEBUG
 606 +// static unsigned long busy_time;
 607 +// #endif
 608 +
 609 +/** Struct to hold the cfdev
 610 +Actually, all the data here only has one instance. However, for
 611 +reasons of programming conformity, it is passed around as a pointer
 612 +*/
 613 +struct cf_mips_dev {
 614 +       void *base; /* base address for I/O */
 615 +       void *baddr; /* remapped address */
 616 +
 617 +       int pin; /* gpio pin */
 618 +       int irq; /* gpio irq */
 619 +
 620 +       unsigned head;
 621 +       unsigned cyl;
 622 +       unsigned spt;
 623 +       unsigned sectors;
 624 +
 625 +       unsigned short block_size;
 626 +       unsigned dtype ; // ATA or CF
 627 +       struct request_queue *queue;
 628 +       struct gendisk  *gd;
 629 +
 630 +       /* Transaction state */
 631 +       enum trans_state tstate;
 632 +       char *tbuf;
 633 +       unsigned long tbuf_size;
 634 +       sector_t tsect_start;
 635 +       unsigned tsector_count;
 636 +       unsigned tsectors_left;
 637 +       int tread;
 638 +       unsigned tcmd;
 639 +       int async_mode;
 640 +       unsigned long irq_enable_time;
 641 +
 642 +       struct request *active_req; /* A request is being carried out. Is that different from tstate? */
 643 +       int users;
 644 +       struct timer_list to_timer;
 645 +       struct tasklet_struct tasklet;
 646 +
 647 +       /** This lock ensures that the requests to this device are all done
 648 +       atomically. Transfers can run in parallel, requests are all queued
 649 +       one-by-one */
 650 +       spinlock_t lock;
 651 +};
 652 +
 653 +int cf_do_transfer(struct cf_mips_dev* dev,sector_t sector, unsigned long nsect,
 654 +       char* buffer, int is_write);
 655 +int cf_init(struct cf_mips_dev* dev);
 656 +void cf_cleanup(struct cf_mips_dev* dev);
 657 +
 658 +void cf_async_trans_done(struct cf_mips_dev* dev, int result);
 659 +// void *cf_get_next_buf(unsigned long *buf_size);
 660 +
 661 +#endif
 662 diff -urN linux.old/drivers/block/rb500/bdev.c linux.dev/drivers/block/rb500/bdev.c
 663 --- linux.old/drivers/block/rb500/bdev.c        1970-01-01 01:00:00.000000000 +0100
 664 +++ linux.dev/drivers/block/rb500/bdev.c        2006-10-26 00:11:14.000000000 +0200
 665 @@ -0,0 +1,339 @@
 666 +/* CF-mips driver
 667 +   This is a block driver for the direct (mmaped) interface to the CF-slot,
 668 +   found in Routerboard.com's RB532 board
 669 +   See SDK provided from routerboard.com.
 670 +
 671 +   Module adapted By P.Christeas <p_christeas@yahoo.com>, 2005-6.
 672 +   Cleaned up and adapted to platform_device by Felix Fietkau <nbd@openwrt.org>
 673 +
 674 +   This work is redistributed under the terms of the GNU General Public License.
 675 +*/
 676 +
 677 +#include <linux/kernel.h>
 678 +#include <linux/module.h>
 679 +#include <linux/init.h>
 680 +#include <linux/time.h>
 681 +#include <linux/wait.h>
 682 +#include <linux/fs.h>
 683 +#include <linux/genhd.h>
 684 +#include <linux/blkdev.h>
 685 +#include <linux/blkpg.h>
 686 +#include <linux/hdreg.h>
 687 +#include <linux/platform_device.h>
 688 +
 689 +#include <asm/uaccess.h>
 690 +#include <asm/io.h>
 691 +
 692 +#include <asm/rc32434/rb.h>
 693 +
 694 +#ifdef DEBUG
 695 +#define DEBUGP printk
 696 +#define DLEVEL 1
 697 +#else
 698 +#define DEBUGP(format, args...)
 699 +#define DLEVEL 0
 700 +#endif
 701 +
 702 +#define CF_MIPS_MAJOR 13
 703 +#define MAJOR_NR       CF_MIPS_MAJOR
 704 +#define CF_MAX_PART    16              /* max 15 partitions */
 705 +
 706 +#include "ata.h"
 707 +
 708 +//extern struct block_device_operations cf_bdops;
 709 +
 710 +// static struct hd_struct cf_parts[CF_MAX_PART];
 711 +// static int cf_part_sizes[CF_MAX_PART];
 712 +// static int cf_hsect_sizes[CF_MAX_PART];
 713 +// static int cf_max_sectors[CF_MAX_PART];
 714 +// static int cf_blksize_sizes[CF_MAX_PART];
 715 +
 716 +// static spinlock_t lock = SPIN_LOCK_UNLOCKED;
 717 +
 718 +// volatile int cf_busy = 0;
 719 +
 720 +static struct request *active_req = NULL;
 721 +
 722 +static int cf_open (struct inode *, struct file *);
 723 +static int cf_release (struct inode *, struct file *);
 724 +static int cf_ioctl (struct inode *, struct file *, unsigned, unsigned long);
 725 +
 726 +static void cf_request(request_queue_t * q);
 727 +static int cf_transfer(const struct request *req);
 728 +
 729 +/*long (*unlocked_ioctl) (struct file *, unsigned, unsigned long);
 730 +long (*compat_ioctl) (struct file *, unsigned, unsigned long);*/
 731 +// int (*direct_access) (struct block_device *, sector_t, unsigned long *);
 732 +// int (*media_changed) (struct gendisk *);
 733 +// int (*revalidate_disk) (struct gendisk *);
 734 +
 735 +static struct block_device_operations cf_bdops = {
 736 +      .owner = THIS_MODULE,
 737 +      .open = cf_open,
 738 +      .release = cf_release,
 739 +      .ioctl = cf_ioctl,
 740 +      .media_changed = NULL,
 741 +      .unlocked_ioctl = NULL,
 742 +      .revalidate_disk = NULL,
 743 +      .compat_ioctl = NULL,
 744 +      .direct_access = NULL
 745 +};
 746 +
 747 +
 748 +int cf_mips_probe(struct platform_device *pdev)
 749 +{
 750 +       struct gendisk* cf_gendisk=NULL;
 751 +       struct cf_device *cdev = (struct cf_device *) pdev->dev.platform_data;
 752 +       struct cf_mips_dev *dev;
 753 +       struct resource *r;
 754 +       int reg_result;
 755 +
 756 +       reg_result = register_blkdev(MAJOR_NR, "cf-mips");
 757 +       if (reg_result < 0) {
 758 +               printk(KERN_WARNING "cf-mips: can't get major %d\n", MAJOR_NR);
 759 +               return reg_result;
 760 +       }
 761 +
 762 +       dev = (struct cf_mips_dev *)kmalloc(sizeof(struct cf_mips_dev),GFP_KERNEL);
 763 +       if (!dev)
 764 +               goto out_err;
 765 +       memset(dev, 0, sizeof(struct cf_mips_dev));
 766 +       cdev->dev = dev;
 767 +
 768 +       dev->pin = cdev->gpio_pin;
 769 +       dev->irq = platform_get_irq_byname(pdev, "cf_irq");
 770 +       r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cf_membase");
 771 +       dev->base = (void *) r->start;
 772 +
 773 +       if (cf_init(dev)) goto out_err;
 774 +       printk("init done");
 775 +
 776 +       spin_lock_init(&dev->lock);
 777 +       dev->queue = blk_init_queue(cf_request,&dev->lock);
 778 +       if (!dev->queue){
 779 +               printk(KERN_ERR "cf-mips: no mem for queue\n");
 780 +               goto out_err;
 781 +       }
 782 +       blk_queue_max_sectors(dev->queue,ATA_MAX_SECT_PER_CMD);
 783 +
 784 +       /* For memory devices, it is always better to avoid crossing segments
 785 +       inside the same request. */
 786 +/*     if (dev->dtype==0x848A){
 787 +               printk(KERN_INFO "Setting boundary for cf to 0x%x",(dev->block_size*512)-1);
 788 +               blk_queue_segment_boundary(dev->queue, (dev->block_size*512)-1);
 789 +       }*/
 790 +
 791 +       dev->gd = alloc_disk(CF_MAX_PART);
 792 +       cf_gendisk = dev->gd;
 793 +       cdev->gd = dev->gd;
 794 +       if (!cf_gendisk) goto out_err; /* Last of these goto's */
 795 +
 796 +       cf_gendisk->major = MAJOR_NR;
 797 +       cf_gendisk->first_minor = 0;
 798 +       cf_gendisk->queue=dev->queue;
 799 +       BUG_ON(cf_gendisk->minors != CF_MAX_PART);
 800 +       strcpy(cf_gendisk->disk_name,"cfa");
 801 +       cf_gendisk->fops = &cf_bdops;
 802 +       cf_gendisk->flags = 0 ; /* is not yet GENHD_FL_REMOVABLE */
 803 +       cf_gendisk->private_data=dev;
 804 +
 805 +       set_capacity(cf_gendisk,dev->sectors * CF_KERNEL_MUL);
 806 +
 807 +       /* Let the disk go live */
 808 +       add_disk(cf_gendisk);
 809 +#if 0
 810 +       result = cf_init();
 811 +
 812 +       /* default cfg for all partitions */
 813 +       memset(cf_parts, 0, sizeof (cf_parts[0]) * CF_MAX_PART);
 814 +       memset(cf_part_sizes, 0, sizeof (cf_part_sizes[0]) * CF_MAX_PART);
 815 +       for (i = 0; i < CF_MAX_PART; ++i) {
 816 +               cf_hsect_sizes[i] = CF_SECT_SIZE;
 817 +               cf_max_sectors[i] = ATA_MAX_SECT_PER_CMD;
 818 +               cf_blksize_sizes[i] = BLOCK_SIZE;
 819 +       }
 820 +
 821 +       /* setup info for whole disk (partition 0) */
 822 +       cf_part_sizes[0] = cf_sectors / 2;
 823 +       cf_parts[0].nr_sects = cf_sectors;
 824 +
 825 +       blk_size[MAJOR_NR] = cf_part_sizes;
 826 +       blksize_size[MAJOR_NR] = cf_blksize_sizes;
 827 +       max_sectors[MAJOR_NR] = cf_max_sectors;
 828 +       hardsect_size[MAJOR_NR] = cf_hsect_sizes;
 829 +       read_ahead[MAJOR_NR] = 8;       /* (4kB) */
 830 +
 831 +       blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST);
 832 +
 833 +       add_gendisk(&cf_gendisk);
 834 +#endif
 835 +//     printk(KERN_INFO "cf-mips partition check: \n");
 836 +//     register_disk(cf_gendisk, MKDEV(MAJOR_NR, 0), CF_MAX_PART,
 837 +//                   &cf_bdops, dev->sectors);
 838 +       return 0;
 839 +
 840 +out_err:
 841 +       if (dev->queue){
 842 +               blk_cleanup_queue(dev->queue);
 843 +       }
 844 +       if (reg_result) {
 845 +               unregister_blkdev(MAJOR_NR, "cf-mips");
 846 +               return reg_result;
 847 +       }
 848 +       if (dev){
 849 +               cf_cleanup(dev);
 850 +               kfree(dev);
 851 +       }
 852 +       return 1;
 853 +}
 854 +
 855 +static int
 856 +cf_mips_remove(struct platform_device *pdev)
 857 +{
 858 +       struct cf_device *cdev = (struct cf_device *) pdev->dev.platform_data;
 859 +       struct cf_mips_dev *dev = (struct cf_mips_dev *) cdev->dev;
 860 +
 861 +       unregister_blkdev(MAJOR_NR, "cf-mips");
 862 +       blk_cleanup_queue(dev->queue);
 863 +
 864 +       del_gendisk(dev->gd);
 865 +       cf_cleanup(dev);
 866 +       return 0;
 867 +}
 868 +
 869 +
 870 +static struct platform_driver cf_driver = {
 871 +       .driver.name = "rb500-cf",
 872 +       .probe = cf_mips_probe,
 873 +       .remove = cf_mips_remove,
 874 +};
 875 +
 876 +static int __init cf_mips_init(void)
 877 +{
 878 +       printk(KERN_INFO "cf-mips module loaded\n");
 879 +       return platform_driver_register(&cf_driver);
 880 +}
 881 +
 882 +static void cf_mips_cleanup(void)
 883 +{
 884 +       platform_driver_unregister(&cf_driver);
 885 +       printk(KERN_INFO "cf-mips module removed\n");
 886 +}
 887 +
 888 +module_init(cf_mips_init);
 889 +module_exit(cf_mips_cleanup);
 890 +
 891 +MODULE_LICENSE("GPL");
 892 +MODULE_ALIAS_BLOCKDEV_MAJOR(CF_MIPS_MAJOR);
 893 +
 894 +
 895 +static int cf_open(struct inode *inode, struct file *filp)
 896 +{
 897 +       struct cf_mips_dev  *dev=inode->i_bdev->bd_disk->private_data;
 898 +       int minor = MINOR(inode->i_rdev);
 899 +
 900 +       if (minor >= CF_MAX_PART)
 901 +               return -ENODEV;
 902 +       //DEBUGP(KERN_INFO "cf-mips module opened, minor %d\n", minor);
 903 +       spin_lock(&dev->lock);
 904 +       dev->users++;
 905 +       spin_unlock(&dev->lock);
 906 +       filp->private_data=dev;
 907 +
 908 +       /* dirty workaround to set CFRDY GPIO as an input when some other
 909 +          program sets it as an output */
 910 +       gpio_set(CFG, (1 << dev->pin), 0);
 911 +       return 0;               /* success */
 912 +}
 913 +
 914 +static int cf_release(struct inode *inode, struct file *filp)
 915 +{
 916 +       int minor = MINOR(inode->i_rdev);
 917 +       struct cf_mips_dev  *dev=inode->i_bdev->bd_disk->private_data;
 918 +       spin_lock(&dev->lock);
 919 +       dev->users--;
 920 +       spin_unlock(&dev->lock);
 921 +       return 0;
 922 +}
 923 +
 924 +static int cf_ioctl(struct inode *inode, struct file *filp,
 925 +        unsigned int cmd, unsigned long arg)
 926 +{
 927 +       unsigned minor = MINOR(inode->i_rdev);
 928 +       struct cf_mips_dev  *dev=inode->i_bdev->bd_disk->private_data;
 929 +
 930 +       DEBUGP(KERN_INFO "cf_ioctl cmd %u\n", cmd);
 931 +       switch (cmd) {
 932 +       case BLKRRPART: /* re-read partition table */
 933 +               if (!capable(CAP_SYS_ADMIN))
 934 +                       return -EACCES;
 935 +               printk(KERN_INFO "cf-mips partition check: \n");
 936 +               register_disk(dev->gd);
 937 +               return 0;
 938 +
 939 +       case HDIO_GETGEO:
 940 +               {
 941 +                       struct hd_geometry geo;
 942 +                       geo.cylinders = dev->cyl;
 943 +                       geo.heads = dev->head;
 944 +                       geo.sectors = dev->spt;
 945 +                       geo.start = (*dev->gd->part)[minor].start_sect;
 946 +                       if (copy_to_user((void *) arg, &geo, sizeof (geo)))
 947 +                               return -EFAULT;
 948 +               }
 949 +               return 0;
 950 +       }
 951 +
 952 +       return -EINVAL;         /* unknown command */
 953 +}
 954 +
 955 +static void cf_request(request_queue_t * q)
 956 +{
 957 +       struct cf_mips_dev* dev;
 958 +
 959 +       struct request * req;
 960 +       int status;
 961 +
 962 +       /* We could have q->queuedata = dev , but haven't yet. */
 963 +       if (active_req)
 964 +               return;
 965 +
 966 +       while ((req=elv_next_request(q))!=NULL){
 967 +               dev=req->rq_disk->private_data;
 968 +               status=cf_transfer(req);
 969 +               if (status==CF_TRANS_IN_PROGRESS){
 970 +                       active_req=req;
 971 +                       return;
 972 +               }
 973 +               end_request(req,status);
 974 +       }
 975 +}
 976 +
 977 +static int cf_transfer(const struct request *req)
 978 +{
 979 +       struct cf_mips_dev* dev=req->rq_disk->private_data;
 980 +
 981 +       if (!blk_fs_request(req)){
 982 +               if (printk_ratelimit())
 983 +                       printk(KERN_WARNING "cf-mips: skipping non-fs request 0x%x\n",req->cmd[0]);
 984 +               return CF_TRANS_FAILED;
 985 +       }
 986 +
 987 +       return cf_do_transfer(dev,req->sector,req->current_nr_sectors,req->buffer,rq_data_dir(req));
 988 +}
 989 +
 990 +void cf_async_trans_done(struct cf_mips_dev * dev,int result)
 991 +{
 992 +       struct request *req;
 993 +
 994 +       spin_lock(&dev->lock);
 995 +       req=active_req;
 996 +       active_req=NULL;
 997 +       end_request(req,result);
 998 +       spin_unlock(&dev->lock);
 999 +
1000 +       spin_lock(&dev->lock);
1001 +       cf_request(dev->queue);
1002 +       spin_unlock(&dev->lock);
1003 +}
1004 +
1005 diff -urN linux.old/drivers/block/rb500/Makefile linux.dev/drivers/block/rb500/Makefile
1006 --- linux.old/drivers/block/rb500/Makefile      1970-01-01 01:00:00.000000000 +0100
1007 +++ linux.dev/drivers/block/rb500/Makefile      2006-10-26 00:11:14.000000000 +0200
1008 @@ -0,0 +1,3 @@
1009 +## Makefile for the RB532 CF port
1010 +
1011 +obj-y          += bdev.o ata.o