| /* |
| * Mapping of a custom board with both AMD CFI and JEDEC flash in partitions. |
| * Config with both CFI and JEDEC device support. |
| * |
| * Basically physmap.c with the addition of partitions and |
| * an array of mapping info to accommodate more than one flash type per board. |
| * |
| * Copyright 2005-2007 PMC-Sierra, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/mtd/mtd.h> |
| #include <linux/mtd/map.h> |
| #include <linux/mtd/partitions.h> |
| |
| #include <asm/io.h> |
| |
| #include <msp_prom.h> |
| #include <msp_regs.h> |
| |
| |
| static struct mtd_info **msp_flash; |
| static struct mtd_partition **msp_parts; |
| static struct map_info *msp_maps; |
| static int fcnt; |
| |
| #define DEBUG_MARKER printk(KERN_NOTICE "%s[%d]\n", __func__, __LINE__) |
| |
| static int __init init_msp_flash(void) |
| { |
| int i, j, ret = -ENOMEM; |
| int offset, coff; |
| char *env; |
| int pcnt; |
| char flash_name[] = "flash0"; |
| char part_name[] = "flash0_0"; |
| unsigned addr, size; |
| |
| /* If ELB is disabled by "ful-mux" mode, we can't get at flash */ |
| if ((*DEV_ID_REG & DEV_ID_SINGLE_PC) && |
| (*ELB_1PC_EN_REG & SINGLE_PCCARD)) { |
| printk(KERN_NOTICE "Single PC Card mode: no flash access\n"); |
| return -ENXIO; |
| } |
| |
| /* examine the prom environment for flash devices */ |
| for (fcnt = 0; (env = prom_getenv(flash_name)); fcnt++) |
| flash_name[5] = '0' + fcnt + 1; |
| |
| if (fcnt < 1) |
| return -ENXIO; |
| |
| printk(KERN_NOTICE "Found %d PMC flash devices\n", fcnt); |
| |
| msp_flash = kcalloc(fcnt, sizeof(*msp_flash), GFP_KERNEL); |
| if (!msp_flash) |
| return -ENOMEM; |
| |
| msp_parts = kcalloc(fcnt, sizeof(*msp_parts), GFP_KERNEL); |
| if (!msp_parts) |
| goto free_msp_flash; |
| |
| msp_maps = kcalloc(fcnt, sizeof(*msp_maps), GFP_KERNEL); |
| if (!msp_maps) |
| goto free_msp_parts; |
| |
| /* loop over the flash devices, initializing each */ |
| for (i = 0; i < fcnt; i++) { |
| /* examine the prom environment for flash partititions */ |
| part_name[5] = '0' + i; |
| part_name[7] = '0'; |
| for (pcnt = 0; (env = prom_getenv(part_name)); pcnt++) |
| part_name[7] = '0' + pcnt + 1; |
| |
| if (pcnt == 0) { |
| printk(KERN_NOTICE "Skipping flash device %d " |
| "(no partitions defined)\n", i); |
| continue; |
| } |
| |
| msp_parts[i] = kcalloc(pcnt, sizeof(struct mtd_partition), |
| GFP_KERNEL); |
| if (!msp_parts[i]) |
| goto cleanup_loop; |
| |
| /* now initialize the devices proper */ |
| flash_name[5] = '0' + i; |
| env = prom_getenv(flash_name); |
| |
| if (sscanf(env, "%x:%x", &addr, &size) < 2) { |
| ret = -ENXIO; |
| kfree(msp_parts[i]); |
| goto cleanup_loop; |
| } |
| addr = CPHYSADDR(addr); |
| |
| printk(KERN_NOTICE |
| "MSP flash device \"%s\": 0x%08x at 0x%08x\n", |
| flash_name, size, addr); |
| /* This must matchs the actual size of the flash chip */ |
| msp_maps[i].size = size; |
| msp_maps[i].phys = addr; |
| |
| /* |
| * Platforms have a specific limit of the size of memory |
| * which may be mapped for flash: |
| */ |
| if (size > CONFIG_MSP_FLASH_MAP_LIMIT) |
| size = CONFIG_MSP_FLASH_MAP_LIMIT; |
| |
| msp_maps[i].virt = ioremap(addr, size); |
| if (msp_maps[i].virt == NULL) { |
| ret = -ENXIO; |
| kfree(msp_parts[i]); |
| goto cleanup_loop; |
| } |
| |
| msp_maps[i].bankwidth = 1; |
| msp_maps[i].name = kstrndup(flash_name, 7, GFP_KERNEL); |
| if (!msp_maps[i].name) { |
| iounmap(msp_maps[i].virt); |
| kfree(msp_parts[i]); |
| goto cleanup_loop; |
| } |
| |
| for (j = 0; j < pcnt; j++) { |
| part_name[5] = '0' + i; |
| part_name[7] = '0' + j; |
| |
| env = prom_getenv(part_name); |
| |
| if (sscanf(env, "%x:%x:%n", &offset, &size, |
| &coff) < 2) { |
| ret = -ENXIO; |
| kfree(msp_maps[i].name); |
| iounmap(msp_maps[i].virt); |
| kfree(msp_parts[i]); |
| goto cleanup_loop; |
| } |
| |
| msp_parts[i][j].size = size; |
| msp_parts[i][j].offset = offset; |
| msp_parts[i][j].name = env + coff; |
| } |
| |
| /* now probe and add the device */ |
| simple_map_init(&msp_maps[i]); |
| msp_flash[i] = do_map_probe("cfi_probe", &msp_maps[i]); |
| if (msp_flash[i]) { |
| msp_flash[i]->owner = THIS_MODULE; |
| mtd_device_register(msp_flash[i], msp_parts[i], pcnt); |
| } else { |
| printk(KERN_ERR "map probe failed for flash\n"); |
| ret = -ENXIO; |
| kfree(msp_maps[i].name); |
| iounmap(msp_maps[i].virt); |
| kfree(msp_parts[i]); |
| goto cleanup_loop; |
| } |
| } |
| |
| return 0; |
| |
| cleanup_loop: |
| while (i--) { |
| mtd_device_unregister(msp_flash[i]); |
| map_destroy(msp_flash[i]); |
| kfree(msp_maps[i].name); |
| iounmap(msp_maps[i].virt); |
| kfree(msp_parts[i]); |
| } |
| kfree(msp_maps); |
| free_msp_parts: |
| kfree(msp_parts); |
| free_msp_flash: |
| kfree(msp_flash); |
| return ret; |
| } |
| |
| static void __exit cleanup_msp_flash(void) |
| { |
| int i; |
| |
| for (i = 0; i < fcnt; i++) { |
| mtd_device_unregister(msp_flash[i]); |
| map_destroy(msp_flash[i]); |
| iounmap((void *)msp_maps[i].virt); |
| |
| /* free the memory */ |
| kfree(msp_maps[i].name); |
| kfree(msp_parts[i]); |
| } |
| |
| kfree(msp_flash); |
| kfree(msp_parts); |
| kfree(msp_maps); |
| } |
| |
| MODULE_AUTHOR("PMC-Sierra, Inc"); |
| MODULE_DESCRIPTION("MTD map driver for PMC-Sierra MSP boards"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(init_msp_flash); |
| module_exit(cleanup_msp_flash); |