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