cstm_mips_ixx.c
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上传日期:2013-02-24
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- /*
- * $Id: cstm_mips_ixx.c,v 1.5 2001/10/02 15:05:14 dwmw2 Exp $
- *
- * 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 accomodate more than one flash type per board.
- *
- * Copyright 2000 MontaVista Software 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/module.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <asm/io.h>
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/map.h>
- #include <linux/mtd/partitions.h>
- #include <linux/config.h>
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- #include <linux/delay.h>
- #endif
- __u8 cstm_mips_ixx_read8(struct map_info *map, unsigned long ofs)
- {
- return *(__u8 *)(map->map_priv_1 + ofs);
- }
- __u16 cstm_mips_ixx_read16(struct map_info *map, unsigned long ofs)
- {
- return *(__u16 *)(map->map_priv_1 + ofs);
- }
- __u32 cstm_mips_ixx_read32(struct map_info *map, unsigned long ofs)
- {
- return *(__u32 *)(map->map_priv_1 + ofs);
- }
- void cstm_mips_ixx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
- {
- memcpy_fromio(to, map->map_priv_1 + from, len);
- }
- void cstm_mips_ixx_write8(struct map_info *map, __u8 d, unsigned long adr)
- {
- *(__u8 *)(map->map_priv_1 + adr) = d;
- }
- void cstm_mips_ixx_write16(struct map_info *map, __u16 d, unsigned long adr)
- {
- *(__u16 *)(map->map_priv_1 + adr) = d;
- }
- void cstm_mips_ixx_write32(struct map_info *map, __u32 d, unsigned long adr)
- {
- *(__u32 *)(map->map_priv_1 + adr) = d;
- }
- void cstm_mips_ixx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
- {
- memcpy_toio(map->map_priv_1 + to, from, len);
- }
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- #define CC_GCR 0xB4013818
- #define CC_GPBCR 0xB401380A
- #define CC_GPBDR 0xB4013808
- #define CC_M68K_DEVICE 1
- #define CC_M68K_FUNCTION 6
- #define CC_CONFADDR 0xB8004000
- #define CC_CONFDATA 0xB8004004
- #define CC_FC_FCR 0xB8002004
- #define CC_FC_DCR 0xB8002008
- #define CC_GPACR 0xB4013802
- #define CC_GPAICR 0xB4013804
- #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
- void cstm_mips_ixx_set_vpp(struct map_info *map,int vpp)
- {
- if (vpp) {
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- __u16 data;
- __u8 data1;
- static u8 first = 1;
- // Set GPIO port B pin3 to high
- data = *(__u16 *)(CC_GPBCR);
- data = (data & 0xff0f) | 0x0040;
- *(__u16 *)CC_GPBCR = data;
- *(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) | 0x08;
- if (first) {
- first = 0;
- /* need to have this delay for first
- enabling vpp after powerup */
- udelay(40);
- }
- #endif /* CONFIG_MIPS_ITE8172 */
- }
- else {
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- __u16 data;
- // Set GPIO port B pin3 to high
- data = *(__u16 *)(CC_GPBCR);
- data = (data & 0xff3f) | 0x0040;
- *(__u16 *)CC_GPBCR = data;
- *(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) & 0xf7;
- #endif /* CONFIG_MIPS_ITE8172 */
- }
- }
- const struct map_info basic_cstm_mips_ixx_map = {
- NULL,
- 0,
- 0,
- cstm_mips_ixx_read8,
- cstm_mips_ixx_read16,
- cstm_mips_ixx_read32,
- cstm_mips_ixx_copy_from,
- cstm_mips_ixx_write8,
- cstm_mips_ixx_write16,
- cstm_mips_ixx_write32,
- cstm_mips_ixx_copy_to,
- cstm_mips_ixx_set_vpp,
- 0,
- 0
- };
- /* board and partition description */
- #define MAX_PHYSMAP_PARTITIONS 8
- struct cstm_mips_ixx_info {
- char *name;
- unsigned long window_addr;
- unsigned long window_size;
- int buswidth;
- int num_partitions;
- };
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- #define PHYSMAP_NUMBER 1 // number of board desc structs needed, one per contiguous flash type
- const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
- {
- { // 28F128J3A in 2x16 configuration
- "big flash", // name
- 0x08000000, // window_addr
- 0x02000000, // window_size
- 4, // buswidth
- 1, // num_partitions
- }
- };
- static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
- { // 28F128J3A in 2x16 configuration
- {
- name: "main partition ",
- size: 0x02000000, // 128 x 2 x 128k byte sectors
- offset: 0,
- },
- },
- };
- #else /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
- #define PHYSMAP_NUMBER 1 // number of board desc structs needed, one per contiguous flash type
- const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
- {
- {
- "MTD flash", // name
- CONFIG_MTD_CSTM_MIPS_IXX_START, // window_addr
- CONFIG_MTD_CSTM_MIPS_IXX_LEN, // window_size
- CONFIG_MTD_CSTM_MIPS_IXX_BUSWIDTH, // buswidth
- 1, // num_partitions
- },
- };
- static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
- {
- {
- name: "main partition",
- size: CONFIG_MTD_CSTM_MIPS_IXX_LEN,
- offset: 0,
- },
- },
- };
- #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
- struct map_info cstm_mips_ixx_map[PHYSMAP_NUMBER];
- int __init init_cstm_mips_ixx(void)
- {
- int i;
- int jedec;
- struct mtd_info *mymtd;
- struct mtd_partition *parts;
- /* Initialize mapping */
- for (i=0;i<PHYSMAP_NUMBER;i++) {
- printk(KERN_NOTICE "cstm_mips_ixx flash device: %lx at %lxn", cstm_mips_ixx_board_desc[i].window_size, cstm_mips_ixx_board_desc[i].window_addr);
- memcpy((char *)&cstm_mips_ixx_map[i],(char *)&basic_cstm_mips_ixx_map,sizeof(struct map_info));
- cstm_mips_ixx_map[i].map_priv_1 = (unsigned long)ioremap(cstm_mips_ixx_board_desc[i].window_addr, cstm_mips_ixx_board_desc[i].window_size);
- if (!cstm_mips_ixx_map[i].map_priv_1) {
- printk(KERN_WARNING "Failed to ioremapn");
- return -EIO;
- }
- cstm_mips_ixx_map[i].name = cstm_mips_ixx_board_desc[i].name;
- cstm_mips_ixx_map[i].size = cstm_mips_ixx_board_desc[i].window_size;
- cstm_mips_ixx_map[i].buswidth = cstm_mips_ixx_board_desc[i].buswidth;
- //printk(KERN_NOTICE "cstm_mips_ixx: ioremap is %xn",(unsigned int)(cstm_mips_ixx_map[i].map_priv_1));
- }
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- setup_ITE_IVR_flash();
- #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
- for (i=0;i<PHYSMAP_NUMBER;i++) {
- parts = &cstm_mips_ixx_partitions[i][0];
- jedec = 0;
- mymtd = (struct mtd_info *)do_map_probe("cfi_probe", &cstm_mips_ixx_map[i]);
- //printk(KERN_NOTICE "phymap %d cfi_probe: mymtd is %xn",i,(unsigned int)mymtd);
- if (!mymtd) {
- jedec = 1;
- mymtd = (struct mtd_info *)do_map_probe("jedec", &cstm_mips_ixx_map[i]);
- printk(KERN_NOTICE "cstm_mips_ixx %d jedec: mymtd is %xn",i,(unsigned int)mymtd);
- }
- if (mymtd) {
- mymtd->module = THIS_MODULE;
- cstm_mips_ixx_map[i].map_priv_2 = (unsigned long)mymtd;
- add_mtd_partitions(mymtd, parts, cstm_mips_ixx_board_desc[i].num_partitions);
- }
- else
- return -ENXIO;
- }
- return 0;
- }
- static void __exit cleanup_cstm_mips_ixx(void)
- {
- int i;
- struct mtd_info *mymtd;
- for (i=0;i<PHYSMAP_NUMBER;i++) {
- mymtd = (struct mtd_info *)cstm_mips_ixx_map[i].map_priv_2;
- if (mymtd) {
- del_mtd_partitions(mymtd);
- map_destroy(mymtd);
- }
- if (cstm_mips_ixx_map[i].map_priv_1) {
- iounmap((void *)cstm_mips_ixx_map[i].map_priv_1);
- cstm_mips_ixx_map[i].map_priv_1 = 0;
- }
- }
- }
- #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
- void PCISetULongByOffset(__u32 DevNumber, __u32 FuncNumber, __u32 Offset, __u32 data)
- {
- __u32 offset;
- offset = ( unsigned long )( 0x80000000 | ( DevNumber << 11 ) + ( FuncNumber << 8 ) + Offset) ;
- *(__u32 *)CC_CONFADDR = offset;
- *(__u32 *)CC_CONFDATA = data;
- }
- void setup_ITE_IVR_flash()
- {
- __u32 size, base;
- size = 0x0e000000; // 32MiB
- base = (0x08000000) >> 8 >>1; // Bug: we must shift one more bit
- /* need to set ITE flash to 32 bits instead of default 8 */
- #ifdef CONFIG_MIPS_IVR
- *(__u32 *)CC_FC_FCR = 0x55;
- *(__u32 *)CC_GPACR = 0xfffc;
- #else
- *(__u32 *)CC_FC_FCR = 0x77;
- #endif
- /* turn bursting off */
- *(__u32 *)CC_FC_DCR = 0x0;
- /* setup for one chip 4 byte PCI access */
- PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x60, size | base);
- PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x64, 0x02);
- }
- #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
- module_init(init_cstm_mips_ixx);
- module_exit(cleanup_cstm_mips_ixx);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
- MODULE_DESCRIPTION("MTD map driver for ITE 8172G and Globespan IVR boards");