/* Copyright(C) 2007 david.goodenough@linkchoose.co.uk (for rewriten code) */
/*==============================================================================*/
-#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
+
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/bootinfo.h>
+#include <asm/mach-adm5120/adm5120_info.h>
+#include <asm/mach-adm5120/adm5120_defs.h>
-#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
#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(KERN_INFO "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(KERN_WARNING "RB1xx nand Unable ioremap buffer\n");
- 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)) {
+
+ 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");
- iounmap ((void *)p_nand);
- return -ENXIO;
+ 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");
projects / openwrt.git / blobdiff