X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fsvn-archive%2Farchive.git;a=blobdiff_plain;f=target%2Flinux%2Fadm5120-2.6%2Ffiles%2Fdrivers%2Fmtd%2Fnand%2Frbmipsnand.c;h=9e6ae1b5778f0c4fd4d76e7093243f7aa26817e0;hp=f086552904f76446cd7569169056864077010966;hb=9a2005e3b5848834db1c25cee989f2dce6b2c2f2;hpb=77accfdf4b5e97e2f146c0bc5ab20529c968e9d1 diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c b/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c index f086552904..9e6ae1b577 100644 --- a/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c +++ b/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c @@ -8,17 +8,21 @@ /* Copyright(C) 2007 david.goodenough@linkchoose.co.uk (for rewriten code) */ /*==============================================================================*/ -#include +#include +#include +#include #include #include #include #include + #include #include #include +#include +#include -#define SMEM1_BASE 0x10000000 // from ADM5120 documentation -#define SMEM1(x) (*((volatile unsigned char *) (KSEG1ADDR(SMEM1_BASE) + x))) +#define SMEM1(x) (*((volatile unsigned char *) (KSEG1ADDR(ADM5120_SRAM1_BASE) + x))) #define NAND_RW_REG 0x0 //data register #define NAND_SET_CEn 0x1 //CE# low @@ -34,78 +38,169 @@ #define NAND_STS_REG 0xB //Status register #define MEM32(x) *((volatile unsigned *) (x)) -static void __iomem *p_nand; - -static int rb100_dev_ready(struct mtd_info *mtd) { - return SMEM1(NAND_STS_REG) & 0x80; -} - -static void rbmips_hwcontrol100(struct mtd_info *mtd, int cmd, unsigned int ctrl) { - struct nand_chip *chip = mtd->priv; - if (ctrl & NAND_CTRL_CHANGE) { - SMEM1((( ctrl & NAND_CLE) ? NAND_SET_CLE : NAND_CLR_CLE)) = 0x01; - SMEM1((( ctrl & NAND_ALE) ? NAND_SET_ALE : NAND_CLR_ALE)) = 0x01; - SMEM1((( ctrl & NAND_NCE) ? NAND_SET_CEn : NAND_CLR_CEn)) = 0x01; - } - if( cmd != NAND_CMD_NONE) - writeb( cmd, chip->IO_ADDR_W); -} static struct mtd_partition partition_info[] = { { name: "RouterBoard NAND Boot", offset: 0, - size: 4 * 1024 * 1024 + size: 4 * 1024 * 1024 }, { - name: "RouterBoard NAND Main", - offset: MTDPART_OFS_NXTBLK, - size: MTDPART_SIZ_FULL + name: "rootfs", + offset: MTDPART_OFS_NXTBLK, + size: MTDPART_SIZ_FULL } }; -static struct mtd_info rmtd; -static struct nand_chip rnand; +static struct nand_ecclayout rb_ecclayout = { + .eccbytes = 6, + .eccpos = { 8, 9, 10, 13, 14, 15 }, + .oobavail = 9, + .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1} } +}; + +struct adm5120_nand_info { + struct nand_chip chip; + struct mtd_info mtd; + void __iomem *io_base; +#ifdef CONFIG_MTD_PARTITIONS + int nr_parts; + struct mtd_partition *parts; +#endif +}; + +static int rb100_dev_ready(struct mtd_info *mtd) +{ + return SMEM1(NAND_STS_REG) & 0x80; +} + +static void rbmips_hwcontrol100(struct mtd_info *mtd, int cmd, unsigned int ctrl) +{ + struct nand_chip *chip = mtd->priv; + if (ctrl & NAND_CTRL_CHANGE) + { + SMEM1((( ctrl & NAND_CLE) ? NAND_SET_CLE : NAND_CLR_CLE)) = 0x01; + SMEM1((( ctrl & NAND_ALE) ? NAND_SET_ALE : NAND_CLR_ALE)) = 0x01; + SMEM1((( ctrl & NAND_NCE) ? NAND_SET_CEn : NAND_CLR_CEn)) = 0x01; + } + if (cmd != NAND_CMD_NONE) + writeb( cmd, chip->IO_ADDR_W); +} + +/*========================================================================*/ +/* We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader */ +/* will not be able to find the kernel that we load. So set the oobinfo */ +/* when creating the partitions. */ +/*========================================================================*/ static unsigned init_ok = 0; -unsigned get_rbnand_block_size(void) { - return init_ok ? rmtd.writesize : 0; +unsigned get_rbnand_block_size(struct adm5120_nand_info *data) +{ + return init_ok ? data->mtd.writesize : 0; } EXPORT_SYMBOL(get_rbnand_block_size); -int __init rbmips_init(void) { - memset(&rmtd, 0, sizeof(rmtd)); - memset(&rnand, 0, sizeof(rnand)); - printk("RB1xx nand\n"); +static int rbmips_probe(struct platform_device *pdev) +{ + struct adm5120_nand_info *data; + int res = 0; + + /* Allocate memory for the nand_chip structure */ + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + dev_err(&pdev->dev, "Failed to allocate device structure\n"); + return -ENOMEM; + + } + + data->io_base = ioremap(pdev->resource[0].start, 0x1000); + + if (data->io_base == NULL) { + dev_err(&pdev->dev, "ioremap failed\n"); + kfree(data); + return -EIO; + } + MEM32(0xB2000064) = 0x100; MEM32(0xB2000008) = 0x1; SMEM1(NAND_SET_SPn) = 0x01; SMEM1(NAND_CLR_WPn) = 0x01; - rnand.IO_ADDR_R = (unsigned char *)KSEG1ADDR(SMEM1_BASE); - rnand.IO_ADDR_W = rnand.IO_ADDR_R; - rnand.cmd_ctrl = rbmips_hwcontrol100; - rnand.dev_ready = rb100_dev_ready; - p_nand = (void __iomem *)ioremap(( unsigned long)SMEM1_BASE, 0x1000); - if (!p_nand) { - printk("RB1xx nand Unable ioremap buffer"); - return -ENXIO; - } - rnand.ecc.mode = NAND_ECC_SOFT; - rnand.chip_delay = 25; - rnand.options |= NAND_NO_AUTOINCR; - rmtd.priv = &rnand; - if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1) - && nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)) { - printk("RB1xxx nand device not found"); - iounmap ((void *)p_nand); - return -ENXIO; + + data->chip.priv = &data; + data->mtd.priv = &data->chip; + data->mtd.owner = THIS_MODULE; + + data->chip.IO_ADDR_R = (unsigned char *)KSEG1ADDR(ADM5120_SRAM1_BASE); + data->chip.IO_ADDR_W = data->chip.IO_ADDR_R; + data->chip.cmd_ctrl = rbmips_hwcontrol100; + data->chip.dev_ready = rb100_dev_ready; + data->chip.ecc.mode = NAND_ECC_SOFT; + data->chip.ecc.layout = &rb_ecclayout; + data->chip.chip_delay = 25; + data->chip.options |= NAND_NO_AUTOINCR; + + platform_set_drvdata(pdev, data); + + /* Why do we need to scan 4 times ? */ + if (nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1)) { + printk(KERN_INFO "RB1xxx nand device not found\n"); + res = -ENXIO; + goto out; } - add_mtd_partitions(&rmtd, partition_info, 2); + + add_mtd_partitions(&data->mtd, partition_info, 2); init_ok = 1; + + res = add_mtd_device(&data->mtd); + if (!res) + return res; + + nand_release(&data->mtd); +out: + platform_set_drvdata(pdev, NULL); + iounmap(data->io_base); + kfree(data); + return res; +} + +static int __devexit rbmips_remove(struct platform_device *pdev) +{ + struct adm5120_nand_info *data = platform_get_drvdata(pdev); + + nand_release(&data->mtd); + iounmap(data->io_base); + kfree(data); + return 0; } -module_init(rbmips_init); +static struct platform_driver adm5120_nand_driver = { + .probe = rbmips_probe, + .remove = rbmips_remove, + .driver = { + .name = "adm5120-nand", + .owner = THIS_MODULE, + }, +}; + +static int __init adm5120_nand_init(void) +{ + int err; + err = platform_driver_register(&adm5120_nand_driver); + return err; +} + +static void __exit adm5120_nand_exit(void) +{ + platform_driver_unregister(&adm5120_nand_driver); +} + +module_init(adm5120_nand_init); +module_exit(adm5120_nand_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Goodenough, Florian Fainelli"); +MODULE_DESCRIPTION("RouterBOARD 100 NAND driver");