Marc St-Jean | 68aa0fa | 2007-03-26 21:45:41 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Mapping of a custom board with both AMD CFI and JEDEC flash in partitions. |
| 3 | * Config with both CFI and JEDEC device support. |
| 4 | * |
| 5 | * Basically physmap.c with the addition of partitions and |
| 6 | * an array of mapping info to accomodate more than one flash type per board. |
| 7 | * |
| 8 | * Copyright 2005-2007 PMC-Sierra, Inc. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 16 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 17 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 18 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 21 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 22 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License along |
| 27 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 28 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 29 | */ |
| 30 | |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/types.h> |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/mtd/mtd.h> |
| 35 | #include <linux/mtd/map.h> |
| 36 | #include <linux/mtd/partitions.h> |
| 37 | |
| 38 | #include <asm/io.h> |
| 39 | |
| 40 | #include <msp_prom.h> |
| 41 | #include <msp_regs.h> |
| 42 | |
| 43 | |
| 44 | static struct mtd_info **msp_flash; |
| 45 | static struct mtd_partition **msp_parts; |
| 46 | static struct map_info *msp_maps; |
| 47 | static int fcnt; |
| 48 | |
Harvey Harrison | cb53b3b | 2008-04-18 13:44:19 -0700 | [diff] [blame] | 49 | #define DEBUG_MARKER printk(KERN_NOTICE "%s[%d]\n", __func__, __LINE__) |
Marc St-Jean | 68aa0fa | 2007-03-26 21:45:41 -0800 | [diff] [blame] | 50 | |
| 51 | int __init init_msp_flash(void) |
| 52 | { |
| 53 | int i, j; |
| 54 | int offset, coff; |
| 55 | char *env; |
| 56 | int pcnt; |
| 57 | char flash_name[] = "flash0"; |
| 58 | char part_name[] = "flash0_0"; |
| 59 | unsigned addr, size; |
| 60 | |
| 61 | /* If ELB is disabled by "ful-mux" mode, we can't get at flash */ |
| 62 | if ((*DEV_ID_REG & DEV_ID_SINGLE_PC) && |
| 63 | (*ELB_1PC_EN_REG & SINGLE_PCCARD)) { |
| 64 | printk(KERN_NOTICE "Single PC Card mode: no flash access\n"); |
| 65 | return -ENXIO; |
| 66 | } |
| 67 | |
| 68 | /* examine the prom environment for flash devices */ |
| 69 | for (fcnt = 0; (env = prom_getenv(flash_name)); fcnt++) |
| 70 | flash_name[5] = '0' + fcnt + 1; |
| 71 | |
| 72 | if (fcnt < 1) |
| 73 | return -ENXIO; |
| 74 | |
| 75 | printk(KERN_NOTICE "Found %d PMC flash devices\n", fcnt); |
Mariusz Kozlowski | 4fb4caa | 2007-07-31 23:49:06 +0200 | [diff] [blame] | 76 | |
| 77 | msp_flash = kmalloc(fcnt * sizeof(struct map_info *), GFP_KERNEL); |
| 78 | msp_parts = kmalloc(fcnt * sizeof(struct mtd_partition *), GFP_KERNEL); |
| 79 | msp_maps = kcalloc(fcnt, sizeof(struct mtd_info), GFP_KERNEL); |
| 80 | if (!msp_flash || !msp_parts || !msp_maps) { |
| 81 | kfree(msp_maps); |
| 82 | kfree(msp_parts); |
| 83 | kfree(msp_flash); |
| 84 | return -ENOMEM; |
| 85 | } |
Marc St-Jean | 68aa0fa | 2007-03-26 21:45:41 -0800 | [diff] [blame] | 86 | |
| 87 | /* loop over the flash devices, initializing each */ |
| 88 | for (i = 0; i < fcnt; i++) { |
| 89 | /* examine the prom environment for flash partititions */ |
| 90 | part_name[5] = '0' + i; |
| 91 | part_name[7] = '0'; |
| 92 | for (pcnt = 0; (env = prom_getenv(part_name)); pcnt++) |
| 93 | part_name[7] = '0' + pcnt + 1; |
| 94 | |
| 95 | if (pcnt == 0) { |
| 96 | printk(KERN_NOTICE "Skipping flash device %d " |
| 97 | "(no partitions defined)\n", i); |
| 98 | continue; |
| 99 | } |
| 100 | |
Mariusz Kozlowski | 4fb4caa | 2007-07-31 23:49:06 +0200 | [diff] [blame] | 101 | msp_parts[i] = kcalloc(pcnt, sizeof(struct mtd_partition), |
| 102 | GFP_KERNEL); |
Marc St-Jean | 68aa0fa | 2007-03-26 21:45:41 -0800 | [diff] [blame] | 103 | |
| 104 | /* now initialize the devices proper */ |
| 105 | flash_name[5] = '0' + i; |
| 106 | env = prom_getenv(flash_name); |
| 107 | |
| 108 | if (sscanf(env, "%x:%x", &addr, &size) < 2) |
| 109 | return -ENXIO; |
| 110 | addr = CPHYSADDR(addr); |
| 111 | |
| 112 | printk(KERN_NOTICE |
| 113 | "MSP flash device \"%s\": 0x%08x at 0x%08x\n", |
| 114 | flash_name, size, addr); |
| 115 | /* This must matchs the actual size of the flash chip */ |
| 116 | msp_maps[i].size = size; |
| 117 | msp_maps[i].phys = addr; |
| 118 | |
| 119 | /* |
| 120 | * Platforms have a specific limit of the size of memory |
| 121 | * which may be mapped for flash: |
| 122 | */ |
| 123 | if (size > CONFIG_MSP_FLASH_MAP_LIMIT) |
| 124 | size = CONFIG_MSP_FLASH_MAP_LIMIT; |
| 125 | msp_maps[i].virt = ioremap(addr, size); |
| 126 | msp_maps[i].bankwidth = 1; |
| 127 | msp_maps[i].name = strncpy(kmalloc(7, GFP_KERNEL), |
| 128 | flash_name, 7); |
| 129 | |
| 130 | if (msp_maps[i].virt == NULL) |
| 131 | return -ENXIO; |
| 132 | |
| 133 | for (j = 0; j < pcnt; j++) { |
| 134 | part_name[5] = '0' + i; |
| 135 | part_name[7] = '0' + j; |
| 136 | |
| 137 | env = prom_getenv(part_name); |
| 138 | |
| 139 | if (sscanf(env, "%x:%x:%n", &offset, &size, &coff) < 2) |
| 140 | return -ENXIO; |
| 141 | |
| 142 | msp_parts[i][j].size = size; |
| 143 | msp_parts[i][j].offset = offset; |
| 144 | msp_parts[i][j].name = env + coff; |
| 145 | } |
| 146 | |
| 147 | /* now probe and add the device */ |
| 148 | simple_map_init(&msp_maps[i]); |
| 149 | msp_flash[i] = do_map_probe("cfi_probe", &msp_maps[i]); |
| 150 | if (msp_flash[i]) { |
| 151 | msp_flash[i]->owner = THIS_MODULE; |
| 152 | add_mtd_partitions(msp_flash[i], msp_parts[i], pcnt); |
| 153 | } else { |
| 154 | printk(KERN_ERR "map probe failed for flash\n"); |
| 155 | return -ENXIO; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static void __exit cleanup_msp_flash(void) |
| 163 | { |
| 164 | int i; |
| 165 | |
| 166 | for (i = 0; i < sizeof(msp_flash) / sizeof(struct mtd_info **); i++) { |
| 167 | del_mtd_partitions(msp_flash[i]); |
| 168 | map_destroy(msp_flash[i]); |
| 169 | iounmap((void *)msp_maps[i].virt); |
| 170 | |
| 171 | /* free the memory */ |
| 172 | kfree(msp_maps[i].name); |
| 173 | kfree(msp_parts[i]); |
| 174 | } |
| 175 | |
| 176 | kfree(msp_flash); |
| 177 | kfree(msp_parts); |
| 178 | kfree(msp_maps); |
| 179 | } |
| 180 | |
| 181 | MODULE_AUTHOR("PMC-Sierra, Inc"); |
| 182 | MODULE_DESCRIPTION("MTD map driver for PMC-Sierra MSP boards"); |
| 183 | MODULE_LICENSE("GPL"); |
| 184 | |
| 185 | module_init(init_msp_flash); |
| 186 | module_exit(cleanup_msp_flash); |