drivers/mtd/maps/ipaq-flash.c

   1 /*
   2  * Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
   3  *
   4  * (C) 2000 Nicolas Pitre <nico@cam.org>
   5  * (C) 2002 Hewlett-Packard Company <jamey.hicks@hp.com>
   6  * (C) 2003 Christian Pellegrin <chri@ascensit.com>, <chri@infis.univ.ts.it>: concatenation of multiple flashes
   7  *
   8  * $Id: ipaq-flash.c,v 1.5 2005/11/07 11:14:27 gleixner Exp $
   9  */
  10
  11 #include <linux/config.h>
  12 #include <linux/module.h>
  13 #include <linux/types.h>
  14 #include <linux/kernel.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/init.h>
  17 #include <linux/slab.h>
  18 #include <asm/page.h>
  19 #include <asm/mach-types.h>
  20 #include <asm/system.h>
  21 #include <asm/errno.h>
  22
  23 #include <linux/mtd/mtd.h>
  24 #include <linux/mtd/map.h>
  25 #include <linux/mtd/partitions.h>
  26 #ifdef CONFIG_MTD_CONCAT
  27 #include <linux/mtd/concat.h>
  28 #endif
  29
  30 #include <asm/hardware.h>
  31 #include <asm/arch-sa1100/h3600.h>
  32 #include <asm/io.h>
  33
  34
  35 #ifndef CONFIG_IPAQ_HANDHELD
  36 #error This is for iPAQ Handhelds only
  37 #endif
  38 #ifdef CONFIG_SA1100_JORNADA56X
  39
  40 static void jornada56x_set_vpp(struct map_info *map, int vpp)
  41 {
  42         if (vpp)
  43                 GPSR = GPIO_GPIO26;
  44         else
  45                 GPCR = GPIO_GPIO26;
  46         GPDR |= GPIO_GPIO26;
  47 }
  48
  49 #endif
  50
  51 #ifdef CONFIG_SA1100_JORNADA720
  52
  53 static void jornada720_set_vpp(struct map_info *map, int vpp)
  54 {
  55         if (vpp)
  56                 PPSR |= 0x80;
  57         else
  58                 PPSR &= ~0x80;
  59         PPDR |= 0x80;
  60 }
  61
  62 #endif
  63
  64 #define MAX_IPAQ_CS 2           /* Number of CS we are going to test */
  65
  66 #define IPAQ_MAP_INIT(X) \
  67         { \
  68                 name:           "IPAQ flash " X, \
  69         }
  70
  71
  72 static struct map_info ipaq_map[MAX_IPAQ_CS] = {
  73         IPAQ_MAP_INIT("bank 1"),
  74         IPAQ_MAP_INIT("bank 2")
  75 };
  76
  77 static struct mtd_info *my_sub_mtd[MAX_IPAQ_CS] = {
  78         NULL,
  79         NULL
  80 };
  81
  82 /*
  83  * Here are partition information for all known IPAQ-based devices.
  84  * See include/linux/mtd/partitions.h for definition of the mtd_partition
  85  * structure.
  86  *
  87  * The *_max_flash_size is the maximum possible mapped flash size which
  88  * is not necessarily the actual flash size.  It must be no more than
  89  * the value specified in the "struct map_desc *_io_desc" mapping
  90  * definition for the corresponding machine.
  91  *
  92  * Please keep these in alphabetical order, and formatted as per existing
  93  * entries.  Thanks.
  94  */
  95
  96 #ifdef CONFIG_IPAQ_HANDHELD
  97 static unsigned long h3xxx_max_flash_size = 0x04000000;
  98 static struct mtd_partition h3xxx_partitions[] = {
  99         {
 100                 name:           "H3XXX boot firmware",
 101 #ifndef CONFIG_LAB
 102                 size:           0x00040000,
 103 #else
 104                 size:           0x00080000,
 105 #endif
 106                 offset:         0,
 107 #ifndef CONFIG_LAB
 108                 mask_flags:     MTD_WRITEABLE,  /* force read-only */
 109 #endif
 110         },
 111         {
 112                 name:           "H3XXX root jffs2",
 113 #ifndef CONFIG_LAB
 114                 size:           0x2000000 - 2*0x40000, /* Warning, this is fixed later */
 115                 offset:         0x00040000,
 116 #else
 117                 size:           0x2000000 - 0x40000 - 0x80000, /* Warning, this is fixed later */
 118                 offset:         0x00080000,
 119 #endif
 120         },
 121         {
 122                 name:           "asset",
 123                 size:           0x40000,
 124                 offset:         0x2000000 - 0x40000, /* Warning, this is fixed later */
 125                 mask_flags:     MTD_WRITEABLE,  /* force read-only */
 126         }
 127 };
 128
 129 #ifndef CONFIG_MTD_CONCAT
 130 static struct mtd_partition h3xxx_partitions_bank2[] = {
 131         /* this is used only on 2 CS machines when concat is not present */
 132         {
 133                 name:           "second H3XXX root jffs2",
 134                 size:           0x1000000 - 0x40000, /* Warning, this is fixed later */
 135                 offset:         0x00000000,
 136         },
 137         {
 138                 name:           "second asset",
 139                 size:           0x40000,
 140                 offset:         0x1000000 - 0x40000, /* Warning, this is fixed later */
 141                 mask_flags:     MTD_WRITEABLE,  /* force read-only */
 142         }
 143 };
 144 #endif
 145
 146 static DEFINE_SPINLOCK(ipaq_vpp_lock);
 147
 148 static void h3xxx_set_vpp(struct map_info *map, int vpp)
 149 {
 150         static int nest = 0;
 151
 152         spin_lock(&ipaq_vpp_lock);
 153         if (vpp)
 154                 nest++;
 155         else
 156                 nest--;
 157         if (nest)
 158                 assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 1);
 159         else
 160                 assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 0);
 161         spin_unlock(&ipaq_vpp_lock);
 162 }
 163
 164 #endif
 165
 166 #if defined(CONFIG_SA1100_JORNADA56X) || defined(CONFIG_SA1100_JORNADA720)
 167 static unsigned long jornada_max_flash_size = 0x02000000;
 168 static struct mtd_partition jornada_partitions[] = {
 169         {
 170                 name:           "Jornada boot firmware",
 171                 size:           0x00040000,
 172                 offset:         0,
 173                 mask_flags:     MTD_WRITEABLE,  /* force read-only */
 174         }, {
 175                 name:           "Jornada root jffs2",
 176                 size:           MTDPART_SIZ_FULL,
 177                 offset:         0x00040000,
 178         }
 179 };
 180 #endif
 181
 182
 183 static struct mtd_partition *parsed_parts;
 184 static struct mtd_info *mymtd;
 185
 186 static unsigned long cs_phys[] = {
 187 #ifdef CONFIG_ARCH_SA1100
 188         SA1100_CS0_PHYS,
 189         SA1100_CS1_PHYS,
 190         SA1100_CS2_PHYS,
 191         SA1100_CS3_PHYS,
 192         SA1100_CS4_PHYS,
 193         SA1100_CS5_PHYS,
 194 #else
 195         PXA_CS0_PHYS,
 196         PXA_CS1_PHYS,
 197         PXA_CS2_PHYS,
 198         PXA_CS3_PHYS,
 199         PXA_CS4_PHYS,
 200         PXA_CS5_PHYS,
 201 #endif
 202 };
 203
 204 static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
 205
 206 static int __init h1900_special_case(void);
 207
 208 int __init ipaq_mtd_init(void)
 209 {
 210         struct mtd_partition *parts = NULL;
 211         int nb_parts = 0;
 212         int parsed_nr_parts = 0;
 213         const char *part_type;
 214         int i; /* used when we have >1 flash chips */
 215         unsigned long tot_flashsize = 0; /* used when we have >1 flash chips */
 216
 217         /* Default flash bankwidth */
 218         // ipaq_map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
 219
 220         if (machine_is_h1900())
 221         {
 222                 /* For our intents, the h1900 is not a real iPAQ, so we special-case it. */
 223                 return h1900_special_case();
 224         }
 225
 226         if (machine_is_h3100() || machine_is_h1900())
 227                 for(i=0; i<MAX_IPAQ_CS; i++)
 228                         ipaq_map[i].bankwidth = 2;
 229         else
 230                 for(i=0; i<MAX_IPAQ_CS; i++)
 231                         ipaq_map[i].bankwidth = 4;
 232
 233         /*
 234          * Static partition definition selection
 235          */
 236         part_type = "static";
 237
 238         simple_map_init(&ipaq_map[0]);
 239         simple_map_init(&ipaq_map[1]);
 240
 241 #ifdef CONFIG_IPAQ_HANDHELD
 242         if (machine_is_ipaq()) {
 243                 parts = h3xxx_partitions;
 244                 nb_parts = ARRAY_SIZE(h3xxx_partitions);
 245                 for(i=0; i<MAX_IPAQ_CS; i++) {
 246                         ipaq_map[i].size = h3xxx_max_flash_size;
 247                         ipaq_map[i].set_vpp = h3xxx_set_vpp;
 248                         ipaq_map[i].phys = cs_phys[i];
 249                         ipaq_map[i].virt = ioremap(cs_phys[i], 0x04000000);
 250                         if (machine_is_h3100 () || machine_is_h1900())
 251                                 ipaq_map[i].bankwidth = 2;
 252                 }
 253                 if (machine_is_h3600()) {
 254                         /* No asset partition here */
 255                         h3xxx_partitions[1].size += 0x40000;
 256                         nb_parts--;
 257                 }
 258         }
 259 #endif
 260 #ifdef CONFIG_ARCH_H5400
 261         if (machine_is_h5400()) {
 262                 ipaq_map[0].size = 0x02000000;
 263                 ipaq_map[1].size = 0x02000000;
 264                 ipaq_map[1].phys = 0x02000000;
 265                 ipaq_map[1].virt = ipaq_map[0].virt + 0x02000000;
 266         }
 267 #endif
 268 #ifdef CONFIG_ARCH_H1900
 269         if (machine_is_h1900()) {
 270                 ipaq_map[0].size = 0x00400000;
 271                 ipaq_map[1].size = 0x02000000;
 272                 ipaq_map[1].phys = 0x00080000;
 273                 ipaq_map[1].virt = ipaq_map[0].virt + 0x00080000;
 274         }
 275 #endif
 276
 277 #ifdef CONFIG_SA1100_JORNADA56X
 278         if (machine_is_jornada56x()) {
 279                 parts = jornada_partitions;
 280                 nb_parts = ARRAY_SIZE(jornada_partitions);
 281                 ipaq_map[0].size = jornada_max_flash_size;
 282                 ipaq_map[0].set_vpp = jornada56x_set_vpp;
 283                 ipaq_map[0].virt = (__u32)ioremap(0x0, 0x04000000);
 284         }
 285 #endif
 286 #ifdef CONFIG_SA1100_JORNADA720
 287         if (machine_is_jornada720()) {
 288                 parts = jornada_partitions;
 289                 nb_parts = ARRAY_SIZE(jornada_partitions);
 290                 ipaq_map[0].size = jornada_max_flash_size;
 291                 ipaq_map[0].set_vpp = jornada720_set_vpp;
 292         }
 293 #endif
 294
 295
 296         if (machine_is_ipaq()) { /* for iPAQs only */
 297                 for(i=0; i<MAX_IPAQ_CS; i++) {
 298                         printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with CFI.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
 299                         my_sub_mtd[i] = do_map_probe("cfi_probe", &ipaq_map[i]);
 300                         if (!my_sub_mtd[i]) {
 301                                 printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
 302                                 my_sub_mtd[i] = do_map_probe("jedec_probe", &ipaq_map[i]);
 303                         }
 304                         if (!my_sub_mtd[i]) {
 305                                 printk(KERN_NOTICE "iPAQ flash: failed to find flash.\n");
 306                                 if (i)
 307                                         break;
 308                                 else
 309                                         return -ENXIO;
 310                         } else
 311                                 printk(KERN_NOTICE "iPAQ flash: found %d bytes\n", my_sub_mtd[i]->size);
 312
 313                         /* do we really need this debugging? --joshua 20030703 */
 314                         // printk("my_sub_mtd[%d]=%p\n", i, my_sub_mtd[i]);
 315                         my_sub_mtd[i]->owner = THIS_MODULE;
 316                         tot_flashsize += my_sub_mtd[i]->size;
 317                 }
 318 #ifdef CONFIG_MTD_CONCAT
 319                 /* fix the asset location */
 320 #       ifdef CONFIG_LAB
 321                 h3xxx_partitions[1].size = tot_flashsize - 0x40000 - 0x80000 /* extra big boot block */;
 322 #       else
 323                 h3xxx_partitions[1].size = tot_flashsize - 2 * 0x40000;
 324 #       endif
 325                 h3xxx_partitions[2].offset = tot_flashsize - 0x40000;
 326                 /* and concat the devices */
 327                 mymtd = mtd_concat_create(&my_sub_mtd[0], i,
 328                                           "ipaq");
 329                 if (!mymtd) {
 330                         printk("Cannot create iPAQ concat device\n");
 331                         return -ENXIO;
 332                 }
 333 #else
 334                 mymtd = my_sub_mtd[0];
 335
 336                 /*
 337                  *In the very near future, command line partition parsing
 338                  * will use the device name as 'mtd-id' instead of a value
 339                  * passed to the parse_cmdline_partitions() routine. Since
 340                  * the bootldr says 'ipaq', make sure it continues to work.
 341                  */
 342                 mymtd->name = "ipaq";
 343
 344                 if ((machine_is_h3600())) {
 345 #       ifdef CONFIG_LAB
 346                         h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x80000;
 347 #       else
 348                         h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000;
 349 #       endif
 350                         nb_parts = 2;
 351                 } else {
 352 #       ifdef CONFIG_LAB
 353                         h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000 - 0x80000; /* extra big boot block */
 354 #       else
 355                         h3xxx_partitions[1].size = my_sub_mtd[0]->size - 2*0x40000;
 356 #       endif
 357                         h3xxx_partitions[2].offset = my_sub_mtd[0]->size - 0x40000;
 358                 }
 359
 360                 if (my_sub_mtd[1]) {
 361 #       ifdef CONFIG_LAB
 362                         h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x80000;
 363 #       else
 364                         h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x40000;
 365 #       endif
 366                         h3xxx_partitions_bank2[1].offset = my_sub_mtd[1]->size - 0x40000;
 367                 }
 368 #endif
 369         }
 370         else {
 371                 /*
 372                  * Now let's probe for the actual flash.  Do it here since
 373                  * specific machine settings might have been set above.
 374                  */
 375                 printk(KERN_NOTICE "IPAQ flash: probing %d-bit flash bus, window=%lx\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
 376                 mymtd = do_map_probe("cfi_probe", &ipaq_map[0]);
 377                 if (!mymtd)
 378                         return -ENXIO;
 379                 mymtd->owner = THIS_MODULE;
 380         }
 381
 382
 383         /*
 384          * Dynamic partition selection stuff (might override the static ones)
 385          */
 386
 387          i = parse_mtd_partitions(mymtd, part_probes, &parsed_parts, 0);
 388
 389          if (i > 0) {
 390                  nb_parts = parsed_nr_parts = i;
 391                  parts = parsed_parts;
 392                  part_type = "dynamic";
 393          }
 394
 395          if (!parts) {
 396                  printk(KERN_NOTICE "IPAQ flash: no partition info available, registering whole flash at once\n");
 397                  add_mtd_device(mymtd);
 398 #ifndef CONFIG_MTD_CONCAT
 399                  if (my_sub_mtd[1])
 400                          add_mtd_device(my_sub_mtd[1]);
 401 #endif
 402          } else {
 403                  printk(KERN_NOTICE "Using %s partition definition\n", part_type);
 404                  add_mtd_partitions(mymtd, parts, nb_parts);
 405 #ifndef CONFIG_MTD_CONCAT
 406                  if (my_sub_mtd[1])
 407                          add_mtd_partitions(my_sub_mtd[1], h3xxx_partitions_bank2, ARRAY_SIZE(h3xxx_partitions_bank2));
 408 #endif
 409          }
 410
 411          return 0;
 412 }
 413
 414 static void __exit ipaq_mtd_cleanup(void)
 415 {
 416         int i;
 417
 418         if (mymtd) {
 419                 del_mtd_partitions(mymtd);
 420 #ifndef CONFIG_MTD_CONCAT
 421                 if (my_sub_mtd[1])
 422                         del_mtd_partitions(my_sub_mtd[1]);
 423 #endif
 424                 map_destroy(mymtd);
 425 #ifdef CONFIG_MTD_CONCAT
 426                 for(i=0; i<MAX_IPAQ_CS; i++)
 427 #else
 428                         for(i=1; i<MAX_IPAQ_CS; i++)
 429 #endif
 430                         {
 431                                 if (my_sub_mtd[i])
 432                                         map_destroy(my_sub_mtd[i]);
 433                         }
 434                 kfree(parsed_parts);
 435         }
 436 }
 437
 438 static int __init h1900_special_case(void)
 439 {
 440         /* The iPAQ h1900 is a special case - it has weird ROM. */
 441         simple_map_init(&ipaq_map[0]);
 442         ipaq_map[0].size = 0x80000;
 443         ipaq_map[0].set_vpp = h3xxx_set_vpp;
 444         ipaq_map[0].phys = 0x0;
 445         ipaq_map[0].virt = ioremap(0x0, 0x04000000);
 446         ipaq_map[0].bankwidth = 2;
 447
 448         printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
 449         mymtd = do_map_probe("jedec_probe", &ipaq_map[0]);
 450         if (!mymtd)
 451                 return -ENODEV;
 452         add_mtd_device(mymtd);
 453         printk(KERN_NOTICE "iPAQ flash: registered h1910 flash\n");
 454
 455         return 0;
 456 }
 457
 458 module_init(ipaq_mtd_init);
 459 module_exit(ipaq_mtd_cleanup);
 460
 461 MODULE_AUTHOR("Jamey Hicks");
 462 MODULE_DESCRIPTION("IPAQ CFI map driver");
 463 MODULE_LICENSE("MIT");