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Diffstat (limited to 'drivers/mtd/nand/w90p910_nand.c')
-rw-r--r--drivers/mtd/nand/w90p910_nand.c382
1 files changed, 0 insertions, 382 deletions
diff --git a/drivers/mtd/nand/w90p910_nand.c b/drivers/mtd/nand/w90p910_nand.c
deleted file mode 100644
index 7680e731348a..000000000000
--- a/drivers/mtd/nand/w90p910_nand.c
+++ /dev/null
@@ -1,382 +0,0 @@
-/*
- * Copyright (c) 2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation;version 2 of the License.
- *
- */
-
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/partitions.h>
-
-#define REG_FMICSR 0x00
-#define REG_SMCSR 0xa0
-#define REG_SMISR 0xac
-#define REG_SMCMD 0xb0
-#define REG_SMADDR 0xb4
-#define REG_SMDATA 0xb8
-
-#define RESET_FMI 0x01
-#define NAND_EN 0x08
-#define READYBUSY (0x01 << 18)
-
-#define SWRST 0x01
-#define PSIZE (0x01 << 3)
-#define DMARWEN (0x03 << 1)
-#define BUSWID (0x01 << 4)
-#define ECC4EN (0x01 << 5)
-#define WP (0x01 << 24)
-#define NANDCS (0x01 << 25)
-#define ENDADDR (0x01 << 31)
-
-#define read_data_reg(dev) \
- __raw_readl((dev)->reg + REG_SMDATA)
-
-#define write_data_reg(dev, val) \
- __raw_writel((val), (dev)->reg + REG_SMDATA)
-
-#define write_cmd_reg(dev, val) \
- __raw_writel((val), (dev)->reg + REG_SMCMD)
-
-#define write_addr_reg(dev, val) \
- __raw_writel((val), (dev)->reg + REG_SMADDR)
-
-struct w90p910_nand {
- struct mtd_info mtd;
- struct nand_chip chip;
- void __iomem *reg;
- struct clk *clk;
- spinlock_t lock;
-};
-
-static const struct mtd_partition partitions[] = {
- {
- .name = "NAND FS 0",
- .offset = 0,
- .size = 8 * 1024 * 1024
- },
- {
- .name = "NAND FS 1",
- .offset = MTDPART_OFS_APPEND,
- .size = MTDPART_SIZ_FULL
- }
-};
-
-static unsigned char w90p910_nand_read_byte(struct mtd_info *mtd)
-{
- unsigned char ret;
- struct w90p910_nand *nand;
-
- nand = container_of(mtd, struct w90p910_nand, mtd);
-
- ret = (unsigned char)read_data_reg(nand);
-
- return ret;
-}
-
-static void w90p910_nand_read_buf(struct mtd_info *mtd,
- unsigned char *buf, int len)
-{
- int i;
- struct w90p910_nand *nand;
-
- nand = container_of(mtd, struct w90p910_nand, mtd);
-
- for (i = 0; i < len; i++)
- buf[i] = (unsigned char)read_data_reg(nand);
-}
-
-static void w90p910_nand_write_buf(struct mtd_info *mtd,
- const unsigned char *buf, int len)
-{
- int i;
- struct w90p910_nand *nand;
-
- nand = container_of(mtd, struct w90p910_nand, mtd);
-
- for (i = 0; i < len; i++)
- write_data_reg(nand, buf[i]);
-}
-
-static int w90p910_verify_buf(struct mtd_info *mtd,
- const unsigned char *buf, int len)
-{
- int i;
- struct w90p910_nand *nand;
-
- nand = container_of(mtd, struct w90p910_nand, mtd);
-
- for (i = 0; i < len; i++) {
- if (buf[i] != (unsigned char)read_data_reg(nand))
- return -EFAULT;
- }
-
- return 0;
-}
-
-static int w90p910_check_rb(struct w90p910_nand *nand)
-{
- unsigned int val;
- spin_lock(&nand->lock);
- val = __raw_readl(REG_SMISR);
- val &= READYBUSY;
- spin_unlock(&nand->lock);
-
- return val;
-}
-
-static int w90p910_nand_devready(struct mtd_info *mtd)
-{
- struct w90p910_nand *nand;
- int ready;
-
- nand = container_of(mtd, struct w90p910_nand, mtd);
-
- ready = (w90p910_check_rb(nand)) ? 1 : 0;
- return ready;
-}
-
-static void w90p910_nand_command_lp(struct mtd_info *mtd,
- unsigned int command, int column, int page_addr)
-{
- register struct nand_chip *chip = mtd->priv;
- struct w90p910_nand *nand;
-
- nand = container_of(mtd, struct w90p910_nand, mtd);
-
- if (command == NAND_CMD_READOOB) {
- column += mtd->writesize;
- command = NAND_CMD_READ0;
- }
-
- write_cmd_reg(nand, command & 0xff);
-
- if (column != -1 || page_addr != -1) {
-
- if (column != -1) {
- if (chip->options & NAND_BUSWIDTH_16)
- column >>= 1;
- write_addr_reg(nand, column);
- write_addr_reg(nand, column >> 8 | ENDADDR);
- }
- if (page_addr != -1) {
- write_addr_reg(nand, page_addr);
-
- if (chip->chipsize > (128 << 20)) {
- write_addr_reg(nand, page_addr >> 8);
- write_addr_reg(nand, page_addr >> 16 | ENDADDR);
- } else {
- write_addr_reg(nand, page_addr >> 8 | ENDADDR);
- }
- }
- }
-
- switch (command) {
- case NAND_CMD_CACHEDPROG:
- case NAND_CMD_PAGEPROG:
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_SEQIN:
- case NAND_CMD_RNDIN:
- case NAND_CMD_STATUS:
- case NAND_CMD_DEPLETE1:
- return;
-
- case NAND_CMD_STATUS_ERROR:
- case NAND_CMD_STATUS_ERROR0:
- case NAND_CMD_STATUS_ERROR1:
- case NAND_CMD_STATUS_ERROR2:
- case NAND_CMD_STATUS_ERROR3:
- udelay(chip->chip_delay);
- return;
-
- case NAND_CMD_RESET:
- if (chip->dev_ready)
- break;
- udelay(chip->chip_delay);
-
- write_cmd_reg(nand, NAND_CMD_STATUS);
- write_cmd_reg(nand, command);
-
- while (!w90p910_check_rb(nand))
- ;
-
- return;
-
- case NAND_CMD_RNDOUT:
- write_cmd_reg(nand, NAND_CMD_RNDOUTSTART);
- return;
-
- case NAND_CMD_READ0:
-
- write_cmd_reg(nand, NAND_CMD_READSTART);
- default:
-
- if (!chip->dev_ready) {
- udelay(chip->chip_delay);
- return;
- }
- }
-
- /* Apply this short delay always to ensure that we do wait tWB in
- * any case on any machine. */
- ndelay(100);
-
- while (!chip->dev_ready(mtd))
- ;
-}
-
-
-static void w90p910_nand_enable(struct w90p910_nand *nand)
-{
- unsigned int val;
- spin_lock(&nand->lock);
- __raw_writel(RESET_FMI, (nand->reg + REG_FMICSR));
-
- val = __raw_readl(nand->reg + REG_FMICSR);
-
- if (!(val & NAND_EN))
- __raw_writel(val | NAND_EN, REG_FMICSR);
-
- val = __raw_readl(nand->reg + REG_SMCSR);
-
- val &= ~(SWRST|PSIZE|DMARWEN|BUSWID|ECC4EN|NANDCS);
- val |= WP;
-
- __raw_writel(val, nand->reg + REG_SMCSR);
-
- spin_unlock(&nand->lock);
-}
-
-static int __devinit w90p910_nand_probe(struct platform_device *pdev)
-{
- struct w90p910_nand *w90p910_nand;
- struct nand_chip *chip;
- int retval;
- struct resource *res;
-
- retval = 0;
-
- w90p910_nand = kzalloc(sizeof(struct w90p910_nand), GFP_KERNEL);
- if (!w90p910_nand)
- return -ENOMEM;
- chip = &(w90p910_nand->chip);
-
- w90p910_nand->mtd.priv = chip;
- w90p910_nand->mtd.owner = THIS_MODULE;
- spin_lock_init(&w90p910_nand->lock);
-
- w90p910_nand->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(w90p910_nand->clk)) {
- retval = -ENOENT;
- goto fail1;
- }
- clk_enable(w90p910_nand->clk);
-
- chip->cmdfunc = w90p910_nand_command_lp;
- chip->dev_ready = w90p910_nand_devready;
- chip->read_byte = w90p910_nand_read_byte;
- chip->write_buf = w90p910_nand_write_buf;
- chip->read_buf = w90p910_nand_read_buf;
- chip->verify_buf = w90p910_verify_buf;
- chip->chip_delay = 50;
- chip->options = 0;
- chip->ecc.mode = NAND_ECC_SOFT;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- retval = -ENXIO;
- goto fail1;
- }
-
- if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
- retval = -EBUSY;
- goto fail1;
- }
-
- w90p910_nand->reg = ioremap(res->start, resource_size(res));
- if (!w90p910_nand->reg) {
- retval = -ENOMEM;
- goto fail2;
- }
-
- w90p910_nand_enable(w90p910_nand);
-
- if (nand_scan(&(w90p910_nand->mtd), 1)) {
- retval = -ENXIO;
- goto fail3;
- }
-
- add_mtd_partitions(&(w90p910_nand->mtd), partitions,
- ARRAY_SIZE(partitions));
-
- platform_set_drvdata(pdev, w90p910_nand);
-
- return retval;
-
-fail3: iounmap(w90p910_nand->reg);
-fail2: release_mem_region(res->start, resource_size(res));
-fail1: kfree(w90p910_nand);
- return retval;
-}
-
-static int __devexit w90p910_nand_remove(struct platform_device *pdev)
-{
- struct w90p910_nand *w90p910_nand = platform_get_drvdata(pdev);
- struct resource *res;
-
- iounmap(w90p910_nand->reg);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- clk_disable(w90p910_nand->clk);
- clk_put(w90p910_nand->clk);
-
- kfree(w90p910_nand);
-
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static struct platform_driver w90p910_nand_driver = {
- .probe = w90p910_nand_probe,
- .remove = __devexit_p(w90p910_nand_remove),
- .driver = {
- .name = "w90p910-fmi",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init w90p910_nand_init(void)
-{
- return platform_driver_register(&w90p910_nand_driver);
-}
-
-static void __exit w90p910_nand_exit(void)
-{
- platform_driver_unregister(&w90p910_nand_driver);
-}
-
-module_init(w90p910_nand_init);
-module_exit(w90p910_nand_exit);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("w90p910 nand driver!");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:w90p910-fmi");
generated by cgit v1.2.3 (git 2.0.4) at 2025-06-02 00:19:51 +0000