diff options
Diffstat (limited to 'drivers/mtd/nand/au1550nd.c')
| -rw-r--r-- | drivers/mtd/nand/au1550nd.c | 166 |
1 files changed, 95 insertions, 71 deletions
diff --git a/drivers/mtd/nand/au1550nd.c b/drivers/mtd/nand/au1550nd.c index 4c7719ce3f48..9c5945d6df88 100644 --- a/drivers/mtd/nand/au1550nd.c +++ b/drivers/mtd/nand/au1550nd.c @@ -3,7 +3,7 @@ * * Copyright (C) 2004 Embedded Edge, LLC * - * $Id: au1550nd.c,v 1.11 2004/11/04 12:53:10 gleixner Exp $ + * $Id: au1550nd.c,v 1.13 2005/11/07 11:14:30 gleixner Exp $ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -17,24 +17,19 @@ #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> #include <linux/mtd/partitions.h> +#include <linux/version.h> #include <asm/io.h> /* fixme: this is ugly */ #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 0) -#include <asm/mach-au1x00/au1000.h> -#ifdef CONFIG_MIPS_PB1550 -#include <asm/mach-pb1x00/pb1550.h> -#endif -#ifdef CONFIG_MIPS_DB1550 -#include <asm/mach-db1x00/db1x00.h> -#endif +#include <asm/mach-au1x00/au1xxx.h> #else #include <asm/au1000.h> #ifdef CONFIG_MIPS_PB1550 -#include <asm/pb1550.h> +#include <asm/pb1550.h> #endif #ifdef CONFIG_MIPS_DB1550 -#include <asm/db1x00.h> +#include <asm/db1x00.h> #endif #endif @@ -45,39 +40,22 @@ static struct mtd_info *au1550_mtd = NULL; static void __iomem *p_nand; static int nand_width = 1; /* default x8*/ -#define NAND_CS 1 - /* * Define partitions for flash device */ const static struct mtd_partition partition_info[] = { -#ifdef CONFIG_MIPS_PB1550 -#define NUM_PARTITIONS 2 - { - .name = "Pb1550 NAND FS 0", + { + .name = "NAND FS 0", .offset = 0, - .size = 8*1024*1024 + .size = 8*1024*1024 }, - { - .name = "Pb1550 NAND FS 1", + { + .name = "NAND FS 1", .offset = MTDPART_OFS_APPEND, - .size = MTDPART_SIZ_FULL + .size = MTDPART_SIZ_FULL } -#endif -#ifdef CONFIG_MIPS_DB1550 -#define NUM_PARTITIONS 2 - { - .name = "Db1550 NAND FS 0", - .offset = 0, - .size = 8*1024*1024 - }, - { - .name = "Db1550 NAND FS 1", - .offset = MTDPART_OFS_APPEND, - .size = MTDPART_SIZ_FULL - } -#endif }; +#define NB_OF(x) (sizeof(x)/sizeof(x[0])) /** @@ -112,7 +90,7 @@ static void au_write_byte(struct mtd_info *mtd, u_char byte) * au_read_byte16 - read one byte endianess aware from the chip * @mtd: MTD device structure * - * read function for 16bit buswith with + * read function for 16bit buswith with * endianess conversion */ static u_char au_read_byte16(struct mtd_info *mtd) @@ -142,7 +120,7 @@ static void au_write_byte16(struct mtd_info *mtd, u_char byte) * au_read_word - read one word from the chip * @mtd: MTD device structure * - * read function for 16bit buswith without + * read function for 16bit buswith without * endianess conversion */ static u16 au_read_word(struct mtd_info *mtd) @@ -158,7 +136,7 @@ static u16 au_read_word(struct mtd_info *mtd) * @mtd: MTD device structure * @word: data word to write * - * write function for 16bit buswith without + * write function for 16bit buswith without * endianess conversion */ static void au_write_word(struct mtd_info *mtd, u16 word) @@ -188,7 +166,7 @@ static void au_write_buf(struct mtd_info *mtd, const u_char *buf, int len) } /** - * au_read_buf - read chip data into buffer + * au_read_buf - read chip data into buffer * @mtd: MTD device structure * @buf: buffer to store date * @len: number of bytes to read @@ -202,12 +180,12 @@ static void au_read_buf(struct mtd_info *mtd, u_char *buf, int len) for (i=0; i<len; i++) { buf[i] = readb(this->IO_ADDR_R); - au_sync(); + au_sync(); } } /** - * au_verify_buf - Verify chip data against buffer + * au_verify_buf - Verify chip data against buffer * @mtd: MTD device structure * @buf: buffer containing the data to compare * @len: number of bytes to compare @@ -242,16 +220,16 @@ static void au_write_buf16(struct mtd_info *mtd, const u_char *buf, int len) struct nand_chip *this = mtd->priv; u16 *p = (u16 *) buf; len >>= 1; - + for (i=0; i<len; i++) { writew(p[i], this->IO_ADDR_W); au_sync(); } - + } /** - * au_read_buf16 - read chip data into buffer + * au_read_buf16 - read chip data into buffer * @mtd: MTD device structure * @buf: buffer to store date * @len: number of bytes to read @@ -272,7 +250,7 @@ static void au_read_buf16(struct mtd_info *mtd, u_char *buf, int len) } /** - * au_verify_buf16 - Verify chip data against buffer + * au_verify_buf16 - Verify chip data against buffer * @mtd: MTD device structure * @buf: buffer containing the data to compare * @len: number of bytes to compare @@ -305,26 +283,26 @@ static void au1550_hwcontrol(struct mtd_info *mtd, int cmd) case NAND_CTL_CLRCLE: this->IO_ADDR_W = p_nand + MEM_STNAND_DATA; break; case NAND_CTL_SETALE: this->IO_ADDR_W = p_nand + MEM_STNAND_ADDR; break; - case NAND_CTL_CLRALE: - this->IO_ADDR_W = p_nand + MEM_STNAND_DATA; - /* FIXME: Nobody knows why this is neccecary, + case NAND_CTL_CLRALE: + this->IO_ADDR_W = p_nand + MEM_STNAND_DATA; + /* FIXME: Nobody knows why this is neccecary, * but it works only that way */ - udelay(1); + udelay(1); break; - case NAND_CTL_SETNCE: + case NAND_CTL_SETNCE: /* assert (force assert) chip enable */ au_writel((1<<(4+NAND_CS)) , MEM_STNDCTL); break; break; - case NAND_CTL_CLRNCE: + case NAND_CTL_CLRNCE: /* deassert chip enable */ au_writel(0, MEM_STNDCTL); break; break; } this->IO_ADDR_R = this->IO_ADDR_W; - + /* Drain the writebuffer */ au_sync(); } @@ -339,14 +317,16 @@ int au1550_device_ready(struct mtd_info *mtd) /* * Main initialization routine */ -int __init au1550_init (void) +int __init au1xxx_nand_init (void) { struct nand_chip *this; u16 boot_swapboot = 0; /* default value */ int retval; + u32 mem_staddr; + u32 nand_phys; /* Allocate memory for MTD device structure and private data */ - au1550_mtd = kmalloc (sizeof(struct mtd_info) + + au1550_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip), GFP_KERNEL); if (!au1550_mtd) { printk ("Unable to allocate NAND MTD dev structure.\n"); @@ -364,14 +344,17 @@ int __init au1550_init (void) au1550_mtd->priv = this; - /* MEM_STNDCTL: disable ints, disable nand boot */ - au_writel(0, MEM_STNDCTL); + /* disable interrupts */ + au_writel(au_readl(MEM_STNDCTL) & ~(1<<8), MEM_STNDCTL); + + /* disable NAND boot */ + au_writel(au_readl(MEM_STNDCTL) & ~(1<<0), MEM_STNDCTL); #ifdef CONFIG_MIPS_PB1550 /* set gpio206 high */ au_writel(au_readl(GPIO2_DIR) & ~(1<<6), GPIO2_DIR); - boot_swapboot = (au_readl(MEM_STSTAT) & (0x7<<1)) | + boot_swapboot = (au_readl(MEM_STSTAT) & (0x7<<1)) | ((bcsr->status >> 6) & 0x1); switch (boot_swapboot) { case 0: @@ -397,25 +380,66 @@ int __init au1550_init (void) } #endif - /* Configure RCE1 - should be done by YAMON */ - au_writel(0x5 | (nand_width << 22), 0xB4001010); /* MEM_STCFG1 */ - au_writel(NAND_TIMING, 0xB4001014); /* MEM_STTIME1 */ - au_sync(); + /* Configure chip-select; normally done by boot code, e.g. YAMON */ +#ifdef NAND_STCFG + if (NAND_CS == 0) { + au_writel(NAND_STCFG, MEM_STCFG0); + au_writel(NAND_STTIME, MEM_STTIME0); + au_writel(NAND_STADDR, MEM_STADDR0); + } + if (NAND_CS == 1) { + au_writel(NAND_STCFG, MEM_STCFG1); + au_writel(NAND_STTIME, MEM_STTIME1); + au_writel(NAND_STADDR, MEM_STADDR1); + } + if (NAND_CS == 2) { + au_writel(NAND_STCFG, MEM_STCFG2); + au_writel(NAND_STTIME, MEM_STTIME2); + au_writel(NAND_STADDR, MEM_STADDR2); + } + if (NAND_CS == 3) { + au_writel(NAND_STCFG, MEM_STCFG3); + au_writel(NAND_STTIME, MEM_STTIME3); + au_writel(NAND_STADDR, MEM_STADDR3); + } +#endif - /* setup and enable chip select, MEM_STADDR1 */ - /* we really need to decode offsets only up till 0x20 */ - au_writel((1<<28) | (NAND_PHYS_ADDR>>4) | - (((NAND_PHYS_ADDR + 0x1000)-1) & (0x3fff<<18)>>18), - MEM_STADDR1); - au_sync(); + /* Locate NAND chip-select in order to determine NAND phys address */ + mem_staddr = 0x00000000; + if (((au_readl(MEM_STCFG0) & 0x7) == 0x5) && (NAND_CS == 0)) + mem_staddr = au_readl(MEM_STADDR0); + else if (((au_readl(MEM_STCFG1) & 0x7) == 0x5) && (NAND_CS == 1)) + mem_staddr = au_readl(MEM_STADDR1); + else if (((au_readl(MEM_STCFG2) & 0x7) == 0x5) && (NAND_CS == 2)) + mem_staddr = au_readl(MEM_STADDR2); + else if (((au_readl(MEM_STCFG3) & 0x7) == 0x5) && (NAND_CS == 3)) + mem_staddr = au_readl(MEM_STADDR3); + + if (mem_staddr == 0x00000000) { + printk("Au1xxx NAND: ERROR WITH NAND CHIP-SELECT\n"); + kfree(au1550_mtd); + return 1; + } + nand_phys = (mem_staddr << 4) & 0xFFFC0000; + + p_nand = (void __iomem *)ioremap(nand_phys, 0x1000); + + /* make controller and MTD agree */ + if (NAND_CS == 0) + nand_width = au_readl(MEM_STCFG0) & (1<<22); + if (NAND_CS == 1) + nand_width = au_readl(MEM_STCFG1) & (1<<22); + if (NAND_CS == 2) + nand_width = au_readl(MEM_STCFG2) & (1<<22); + if (NAND_CS == 3) + nand_width = au_readl(MEM_STCFG3) & (1<<22); - p_nand = ioremap(NAND_PHYS_ADDR, 0x1000); /* Set address of hardware control function */ this->hwcontrol = au1550_hwcontrol; this->dev_ready = au1550_device_ready; /* 30 us command delay time */ - this->chip_delay = 30; + this->chip_delay = 30; this->eccmode = NAND_ECC_SOFT; this->options = NAND_NO_AUTOINCR; @@ -438,19 +462,19 @@ int __init au1550_init (void) } /* Register the partitions */ - add_mtd_partitions(au1550_mtd, partition_info, NUM_PARTITIONS); + add_mtd_partitions(au1550_mtd, partition_info, NB_OF(partition_info)); return 0; outio: iounmap ((void *)p_nand); - + outmem: kfree (au1550_mtd); return retval; } -module_init(au1550_init); +module_init(au1xxx_nand_init); /* * Clean up routine |
