drivers/mtd/maps/cstm_mips_ixx.c

   1 /*
   2  * $Id: cstm_mips_ixx.c,v 1.14 2005/11/07 11:14:26 gleixner Exp $
   3  *
   4  * Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
   5  * Config with both CFI and JEDEC device support.
   6  *
   7  * Basically physmap.c with the addition of partitions and
   8  * an array of mapping info to accomodate more than one flash type per board.
   9  *
  10  * Copyright 2000 MontaVista Software Inc.
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  *
  17  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  18  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  19  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  20  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  21  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  23  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  24  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  25  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  *  You should have received a copy of the  GNU General Public License along
  29  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  30  *  675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/types.h>
  35 #include <linux/kernel.h>
  36 #include <linux/init.h>
  37 #include <asm/io.h>
  38 #include <linux/mtd/mtd.h>
  39 #include <linux/mtd/map.h>
  40 #include <linux/mtd/partitions.h>
  41 #include <linux/delay.h>
  42
  43 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
  44 #define CC_GCR             0xB4013818
  45 #define CC_GPBCR           0xB401380A
  46 #define CC_GPBDR           0xB4013808
  47 #define CC_M68K_DEVICE     1
  48 #define CC_M68K_FUNCTION   6
  49 #define CC_CONFADDR        0xB8004000
  50 #define CC_CONFDATA        0xB8004004
  51 #define CC_FC_FCR          0xB8002004
  52 #define CC_FC_DCR          0xB8002008
  53 #define CC_GPACR           0xB4013802
  54 #define CC_GPAICR          0xB4013804
  55 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
  56
  57 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
  58 void cstm_mips_ixx_set_vpp(struct map_info *map,int vpp)
  59 {
  60         static DEFINE_SPINLOCK(vpp_lock);
  61         static int vpp_count = 0;
  62         unsigned long flags;
  63
  64         spin_lock_irqsave(&vpp_lock, flags);
  65
  66         if (vpp) {
  67                 if (!vpp_count++) {
  68                         __u16   data;
  69                         __u8    data1;
  70                         static u8 first = 1;
  71
  72                         // Set GPIO port B pin3 to high
  73                         data = *(__u16 *)(CC_GPBCR);
  74                         data = (data & 0xff0f) | 0x0040;
  75                         *(__u16 *)CC_GPBCR = data;
  76                         *(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) | 0x08;
  77                         if (first) {
  78                                 first = 0;
  79                                 /* need to have this delay for first
  80                                    enabling vpp after powerup */
  81                                 udelay(40);
  82                         }
  83                 }
  84         } else {
  85                 if (!--vpp_count) {
  86                         __u16   data;
  87
  88                         // Set GPIO port B pin3 to high
  89                         data = *(__u16 *)(CC_GPBCR);
  90                         data = (data & 0xff3f) | 0x0040;
  91                         *(__u16 *)CC_GPBCR = data;
  92                         *(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) & 0xf7;
  93                 }
  94         }
  95         spin_unlock_irqrestore(&vpp_lock, flags);
  96 }
  97 #endif
  98
  99 /* board and partition description */
 100
 101 #define MAX_PHYSMAP_PARTITIONS    8
 102 struct cstm_mips_ixx_info {
 103         char *name;
 104         unsigned long window_addr;
 105         unsigned long window_size;
 106         int bankwidth;
 107         int num_partitions;
 108 };
 109
 110 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
 111 #define PHYSMAP_NUMBER  1  // number of board desc structs needed, one per contiguous flash type
 112 const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
 113 {
 114     {   // 28F128J3A in 2x16 configuration
 115         "big flash",     // name
 116         0x08000000,      // window_addr
 117         0x02000000,      // window_size
 118         4,               // bankwidth
 119         1,               // num_partitions
 120     }
 121
 122 };
 123 static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
 124 {   // 28F128J3A in 2x16 configuration
 125         {
 126                 .name = "main partition ",
 127                 .size = 0x02000000, // 128 x 2 x 128k byte sectors
 128                 .offset = 0,
 129         },
 130 },
 131 };
 132 #else /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
 133 #define PHYSMAP_NUMBER  1  // number of board desc structs needed, one per contiguous flash type
 134 const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
 135 {
 136     {
 137         "MTD flash",                   // name
 138         CONFIG_MTD_CSTM_MIPS_IXX_START,      // window_addr
 139         CONFIG_MTD_CSTM_MIPS_IXX_LEN,        // window_size
 140         CONFIG_MTD_CSTM_MIPS_IXX_BUSWIDTH,   // bankwidth
 141         1,                             // num_partitions
 142     },
 143
 144 };
 145 static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
 146 {
 147         {
 148                 .name = "main partition",
 149                 .size =  CONFIG_MTD_CSTM_MIPS_IXX_LEN,
 150                 .offset = 0,
 151         },
 152 },
 153 };
 154 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
 155
 156 struct map_info cstm_mips_ixx_map[PHYSMAP_NUMBER];
 157
 158 int __init init_cstm_mips_ixx(void)
 159 {
 160         int i;
 161         int jedec;
 162         struct mtd_info *mymtd;
 163         struct mtd_partition *parts;
 164
 165         /* Initialize mapping */
 166         for (i=0;i<PHYSMAP_NUMBER;i++) {
 167                 printk(KERN_NOTICE "cstm_mips_ixx flash device: 0x%lx at 0x%lx\n",
 168                        cstm_mips_ixx_board_desc[i].window_size, cstm_mips_ixx_board_desc[i].window_addr);
 169
 170
 171                 cstm_mips_ixx_map[i].phys = cstm_mips_ixx_board_desc[i].window_addr;
 172                 cstm_mips_ixx_map[i].virt = ioremap(cstm_mips_ixx_board_desc[i].window_addr, cstm_mips_ixx_board_desc[i].window_size);
 173                 if (!cstm_mips_ixx_map[i].virt) {
 174                         int j = 0;
 175                         printk(KERN_WARNING "Failed to ioremap\n");
 176                         for (j = 0; j < i; j++) {
 177                                 if (cstm_mips_ixx_map[j].virt) {
 178                                         iounmap(cstm_mips_ixx_map[j].virt);
 179                                         cstm_mips_ixx_map[j].virt = NULL;
 180                                 }
 181                         }
 182                         return -EIO;
 183                 }
 184                 cstm_mips_ixx_map[i].name = cstm_mips_ixx_board_desc[i].name;
 185                 cstm_mips_ixx_map[i].size = cstm_mips_ixx_board_desc[i].window_size;
 186                 cstm_mips_ixx_map[i].bankwidth = cstm_mips_ixx_board_desc[i].bankwidth;
 187 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
 188                 cstm_mips_ixx_map[i].set_vpp = cstm_mips_ixx_set_vpp;
 189 #endif
 190                 simple_map_init(&cstm_mips_ixx_map[i]);
 191                 //printk(KERN_NOTICE "cstm_mips_ixx: ioremap is %x\n",(unsigned int)(cstm_mips_ixx_map[i].virt));
 192         }
 193
 194 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
 195         setup_ITE_IVR_flash();
 196 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
 197
 198         for (i=0;i<PHYSMAP_NUMBER;i++) {
 199                 parts = &cstm_mips_ixx_partitions[i][0];
 200                 jedec = 0;
 201                 mymtd = (struct mtd_info *)do_map_probe("cfi_probe", &cstm_mips_ixx_map[i]);
 202                 //printk(KERN_NOTICE "phymap %d cfi_probe: mymtd is %x\n",i,(unsigned int)mymtd);
 203                 if (!mymtd) {
 204                         jedec = 1;
 205                         mymtd = (struct mtd_info *)do_map_probe("jedec", &cstm_mips_ixx_map[i]);
 206                         printk(KERN_NOTICE "cstm_mips_ixx %d jedec: mymtd is %x\n",i,(unsigned int)mymtd);
 207                 }
 208                 if (mymtd) {
 209                         mymtd->owner = THIS_MODULE;
 210
 211                         cstm_mips_ixx_map[i].map_priv_2 = (unsigned long)mymtd;
 212                         add_mtd_partitions(mymtd, parts, cstm_mips_ixx_board_desc[i].num_partitions);
 213                 }
 214                 else {
 215                         for (i = 0; i < PHYSMAP_NUMBER; i++) {
 216                                 if (cstm_mips_ixx_map[i].virt) {
 217                                         iounmap(cstm_mips_ixx_map[i].virt);
 218                                         cstm_mips_ixx_map[i].virt = NULL;
 219                                 }
 220                         }
 221                         return -ENXIO;
 222                 }
 223         }
 224         return 0;
 225 }
 226
 227 static void __exit cleanup_cstm_mips_ixx(void)
 228 {
 229         int i;
 230         struct mtd_info *mymtd;
 231
 232         for (i=0;i<PHYSMAP_NUMBER;i++) {
 233                 mymtd = (struct mtd_info *)cstm_mips_ixx_map[i].map_priv_2;
 234                 if (mymtd) {
 235                         del_mtd_partitions(mymtd);
 236                         map_destroy(mymtd);
 237                 }
 238                 if (cstm_mips_ixx_map[i].virt) {
 239                         iounmap((void *)cstm_mips_ixx_map[i].virt);
 240                         cstm_mips_ixx_map[i].virt = 0;
 241                 }
 242         }
 243 }
 244 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
 245 void PCISetULongByOffset(__u32 DevNumber, __u32 FuncNumber, __u32 Offset, __u32 data)
 246 {
 247         __u32   offset;
 248
 249         offset = ( unsigned long )( 0x80000000 | ( DevNumber << 11 ) + ( FuncNumber << 8 ) + Offset) ;
 250
 251         *(__u32 *)CC_CONFADDR = offset;
 252         *(__u32 *)CC_CONFDATA = data;
 253 }
 254 void setup_ITE_IVR_flash()
 255 {
 256                 __u32   size, base;
 257
 258                 size = 0x0e000000;              // 32MiB
 259                 base = (0x08000000) >> 8 >>1; // Bug: we must shift one more bit
 260
 261                 /* need to set ITE flash to 32 bits instead of default 8 */
 262 #ifdef CONFIG_MIPS_IVR
 263                 *(__u32 *)CC_FC_FCR = 0x55;
 264                 *(__u32 *)CC_GPACR = 0xfffc;
 265 #else
 266                 *(__u32 *)CC_FC_FCR = 0x77;
 267 #endif
 268                 /* turn bursting off */
 269                 *(__u32 *)CC_FC_DCR = 0x0;
 270
 271                 /* setup for one chip 4 byte PCI access */
 272                 PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x60, size | base);
 273                 PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x64, 0x02);
 274 }
 275 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
 276
 277 module_init(init_cstm_mips_ixx);
 278 module_exit(cleanup_cstm_mips_ixx);
 279
 280
 281 MODULE_LICENSE("GPL");
 282 MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
 283 MODULE_DESCRIPTION("MTD map driver for ITE 8172G and Globespan IVR boards");