-#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>
-
-#define IDT434_REG_BASE ((volatile void *) KSEG1ADDR(0x18000000))
-
-#define GPIOF 0x050000
-#define GPIOC 0x050004
-#define GPIOD 0x050008
-
-#define GPIO_RDY (1 << 0x08)
-#define GPIO_WPX (1 << 0x09)
-#define GPIO_ALE (1 << 0x0a)
-#define GPIO_CLE (1 << 0x0b)
-
-#define DEV2BASE 0x010020
-
-#define LO_WPX (1 << 0)
-#define LO_ALE (1 << 1)
-#define LO_CLE (1 << 2)
-#define LO_CEX (1 << 3)
-#define LO_FOFF (1 << 5)
-#define LO_SPICS (1 << 6)
-#define LO_ULED (1 << 7)
-
-#define MEM32(x) *((volatile unsigned *) (x))
-
-extern char *board_type;
-
-struct rb500_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
- int init_ok;
- int flags1;
- int flags2;
-};
-
-static struct mtd_partition partition_info[] = {
- {
- name:"RouterBoard NAND Boot",
- offset:0,
- size:4 * 1024 * 1024},
- {
- name:"rootfs",
- offset:MTDPART_OFS_NXTBLK,
- size:MTDPART_SIZ_FULL}
-};
-
-extern void changeLatchU5(unsigned char orMask, unsigned char nandMask);
-
-static int rb500_dev_ready(struct mtd_info *mtd)
-{
- return MEM32(IDT434_REG_BASE + GPIOD) & GPIO_RDY;
-}
-
-/*
- * hardware specific access to control-lines
- *
- * ctrl:
- * NAND_CLE: bit 2 -> bit 3
- * NAND_ALE: bit 3 -> bit 2
- */
-static void rbmips_hwcontrol500(struct mtd_info *mtd, int cmd,
- unsigned int ctrl)
-{
- struct nand_chip *chip = mtd->priv;
- unsigned char orbits, nandbits;
-
- if (ctrl & NAND_CTRL_CHANGE) {
-
- orbits = (ctrl & NAND_CLE) << 1;
- orbits |= (ctrl & NAND_ALE) >> 1;
-
- nandbits = (~ctrl & NAND_CLE) << 1;
- nandbits |= (~ctrl & NAND_ALE) >> 1;
-
- changeLatchU5(orbits, nandbits);
- }
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, chip->IO_ADDR_W);
-
-}
-
-unsigned get_rbnand_block_size(struct rb500_nand_info *data)
-{
- if (data->init_ok)
- return data->mtd.writesize;
- else
- return 0;
-}
-
-EXPORT_SYMBOL(get_rbnand_block_size);
-
-static int rbmips_probe(struct platform_device *pdev)
-{
- struct rb500_nand_info *data;
- int res = 0;
- int *b;
-
- /* Allocate memory for the 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, pdev->resource[0].end - pdev->resource[0].start + 1);
-
- if (data->io_base == NULL) {
- dev_err(&pdev->dev, "ioremap failed\n");
- kfree(data);
- return -EIO;
- }
-
- if (!strcmp(board_type, "500r5")) {
- data->flags1 = LO_FOFF | LO_CEX;
- data->flags2 = LO_ULED | LO_ALE | LO_CLE | LO_WPX;
- }
- else {
- data->flags1 = LO_WPX | LO_FOFF | LO_CEX;
- data->flags2 = LO_ULED | LO_ALE | LO_CLE;
- }
-
- changeLatchU5(data->flags1, data->flags2);
-
- data->chip.cmd_ctrl = rbmips_hwcontrol500;
-
- data->chip.dev_ready = rb500_dev_ready;
- data->chip.IO_ADDR_W = (unsigned char *)KSEG1ADDR(MEM32(IDT434_REG_BASE + DEV2BASE));
- data->chip.IO_ADDR_R = data->chip.IO_ADDR_W;
-
- data->chip.ecc.mode = NAND_ECC_SOFT;
- data->chip.chip_delay = 25;
- data->chip.options |= NAND_NO_AUTOINCR;
-
- data->chip.priv = &data;
- data->mtd.priv = &data->chip;
- data->mtd.owner = THIS_MODULE;
-
- b = (int *) KSEG1ADDR(0x18010020);
- printk("dev2base 0x%08x mask 0x%08x c 0x%08x tc 0x%08x\n", b[0],
- b[1], b[2], b[3]);
-
- 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 "RB500 nand device not found\n");
- res = -ENXIO;
- goto out;
- }
-
- printk(KERN_INFO "RB500 NAND\n");
- add_mtd_partitions(&data->mtd, partition_info, 2);
- data->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 rb500_nand_info *data = platform_get_drvdata(pdev);
-
- nand_release(&data->mtd);
- iounmap(data->io_base);
- kfree(data);
-
- return 0;
-}
-
-static struct platform_driver rb500_nand_driver = {
- .probe = rbmips_probe,
- .remove = rbmips_remove,
- .driver = {
- .name = "rb500-nand",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init rb500_nand_init(void)
-{
- int err;
- err = platform_driver_register(&rb500_nand_driver);
- return err;
-}
-
-static void __exit rb500_nand_exit(void)
-{
- platform_driver_unregister(&rb500_nand_driver);
-}
-
-module_init(rb500_nand_init);
-module_exit(rb500_nand_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Goodenough, Felix Fietkau, Florian Fainelli");
-MODULE_DESCRIPTION("RouterBOARD 500 NAND driver");
projects / openwrt.git / commitdiff