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@ -1,8 +1,11 @@ |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/mtd/nand.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/delay.h> |
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#include <asm/io.h> |
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#include <asm/irq.h> |
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#include <asm/bootinfo.h> |
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@ -29,7 +32,30 @@ |
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#define LO_ULED (1 << 7) |
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#define MEM32(x) *((volatile unsigned *) (x)) |
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static void __iomem *p_nand; |
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struct rb500_nand_info { |
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struct nand_chip chip; |
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struct mtd_info mtd; |
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void __iomem *io_base; |
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#ifdef CONFIG_MTD_PARTITIONS |
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int nr_parts; |
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struct mtd_partition *parts; |
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#endif |
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int init_ok; |
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int flags1; |
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int flags2; |
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}; |
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static struct mtd_partition partition_info[] = { |
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{ |
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name:"RouterBoard NAND Boot", |
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offset:0, |
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size:4 * 1024 * 1024}, |
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{ |
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name:"rootfs", |
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offset:MTDPART_OFS_NXTBLK, |
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size:MTDPART_SIZ_FULL} |
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}; |
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extern void changeLatchU5(unsigned char orMask, unsigned char nandMask); |
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@ -66,72 +92,121 @@ static void rbmips_hwcontrol500(struct mtd_info *mtd, int cmd, |
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} |
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static struct mtd_partition partition_info[] = { |
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{ |
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name:"RouterBoard NAND Boot", |
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offset:0, |
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size:4 * 1024 * 1024}, |
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{ |
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name:"RouterBoard NAND Main", |
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offset:MTDPART_OFS_NXTBLK, |
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size:MTDPART_SIZ_FULL} |
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}; |
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static struct mtd_info rmtd; |
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static struct nand_chip rnand; |
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static unsigned init_ok = 0; |
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unsigned get_rbnand_block_size(void) |
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unsigned get_rbnand_block_size(struct rb500_nand_info *data) |
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{ |
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if (init_ok) |
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return rmtd.writesize; |
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if (data->init_ok) |
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return data->mtd.writesize; |
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else |
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return 0; |
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} |
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EXPORT_SYMBOL(get_rbnand_block_size); |
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int __init rbmips_init(void) |
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static int rbmips_probe(struct platform_device *pdev) |
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{ |
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struct rb500_nand_info *data; |
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int res = 0; |
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int *b; |
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memset(&rmtd, 0, sizeof(rmtd)); |
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memset(&rnand, 0, sizeof(rnand)); |
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printk("RB500 nand\n"); |
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changeLatchU5(LO_FOFF | LO_CEX, |
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LO_ULED | LO_ALE | LO_CLE | LO_WPX); |
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rnand.cmd_ctrl = rbmips_hwcontrol500; |
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rnand.dev_ready = rb500_dev_ready; |
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rnand.IO_ADDR_W = (unsigned char *) |
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KSEG1ADDR(MEM32(IDT434_REG_BASE + DEV2BASE)); |
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rnand.IO_ADDR_R = rnand.IO_ADDR_W; |
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p_nand = (void __iomem *) ioremap((void *) 0x18a20000, 0x1000); |
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if (!p_nand) { |
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printk("RBnand Unable ioremap buffer"); |
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return -ENXIO; |
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/* Allocate memory for the structure */ |
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data = kzalloc(sizeof(*data), GFP_KERNEL); |
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if (!data) { |
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dev_err(&pdev->dev, "Failed to allocate device structure\n"); |
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return -ENOMEM; |
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} |
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rnand.ecc.mode = NAND_ECC_SOFT; |
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rnand.chip_delay = 25; |
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rnand.options |= NAND_NO_AUTOINCR; |
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rmtd.priv = &rnand; |
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data->io_base = ioremap(pdev->resource[0].start, pdev->resource[0].end - pdev->resource[0].start + 1); |
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if (data->io_base == NULL) { |
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dev_err(&pdev->dev, "ioremap failed\n"); |
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kfree(data); |
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return -EIO; |
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} |
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/* FIXME : this seems to work only for newer RB500, check the version to set the right flags accordingly */ |
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data->flags1 = LO_FOFF | LO_CEX; |
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data->flags2 = LO_ULED | LO_ALE | LO_CLE | LO_WPX; |
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changeLatchU5(data->flags1, data->flags2); |
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data->chip.cmd_ctrl = rbmips_hwcontrol500; |
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data->chip.dev_ready = rb500_dev_ready; |
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data->chip.IO_ADDR_W = (unsigned char *)KSEG1ADDR(MEM32(IDT434_REG_BASE + DEV2BASE)); |
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data->chip.IO_ADDR_R = data->chip.IO_ADDR_W; |
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data->chip.ecc.mode = NAND_ECC_SOFT; |
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data->chip.chip_delay = 25; |
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data->chip.options |= NAND_NO_AUTOINCR; |
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data->chip.priv = &data; |
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data->mtd.priv = &data->chip; |
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data->mtd.owner = THIS_MODULE; |
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b = (int *) KSEG1ADDR(0x18010020); |
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printk("dev2base 0x%08x mask 0x%08x c 0x%08x tc 0x%08x\n", b[0], |
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b[1], b[2], b[3]); |
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if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1) |
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&& nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)) { |
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printk("RBxxx nand device not found\n"); |
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iounmap((void *) p_nand); |
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return -ENXIO; |
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} |
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platform_set_drvdata(pdev, data); |
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/* Why do we need to scan 4 times ? */ |
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if (nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1) && nand_scan(&data->mtd, 1)) { |
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printk(KERN_INFO "RB500 nand device not found\n"); |
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res = -ENXIO; |
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goto out; |
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} |
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printk(KERN_INFO "RB500 NAND\n"); |
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add_mtd_partitions(&data->mtd, partition_info, 2); |
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data->init_ok = 1; |
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res = add_mtd_device(&data->mtd); |
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if (!res) |
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return res; |
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nand_release(&data->mtd); |
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out: |
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platform_set_drvdata(pdev, NULL); |
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iounmap(data->io_base); |
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kfree(data); |
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return res; |
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} |
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static int __devexit rbmips_remove(struct platform_device *pdev) |
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{ |
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struct rb500_nand_info *data = platform_get_drvdata(pdev); |
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nand_release(&data->mtd); |
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iounmap(data->io_base); |
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kfree(data); |
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add_mtd_partitions(&rmtd, partition_info, 2); |
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init_ok = 1; |
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return 0; |
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return 0; |
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} |
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module_init(rbmips_init); |
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static struct platform_driver rb500_nand_driver = { |
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.probe = rbmips_probe, |
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.remove = rbmips_remove, |
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.driver = { |
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.name = "rb500-nand", |
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.owner = THIS_MODULE, |
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}, |
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}; |
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static int __init rb500_nand_init(void) |
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{ |
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int err; |
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err = platform_driver_register(&rb500_nand_driver); |
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return err; |
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} |
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static void __exit rb500_nand_exit(void) |
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{ |
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platform_driver_unregister(&rb500_nand_driver); |
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} |
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module_init(rb500_nand_init); |
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module_exit(rb500_nand_exit); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("David Goodenough, Felix Fietkau, Florian Fainelli"); |
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MODULE_DESCRIPTION("RouterBOARD 500 NAND driver"); |
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