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