diff options
Diffstat (limited to 'drivers/mtd/nand/cmx270_nand.c')
| -rw-r--r-- | drivers/mtd/nand/cmx270_nand.c | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/drivers/mtd/nand/cmx270_nand.c b/drivers/mtd/nand/cmx270_nand.c deleted file mode 100644 index 39b2ef848811..000000000000 --- a/drivers/mtd/nand/cmx270_nand.c +++ /dev/null @@ -1,251 +0,0 @@ -/* - * linux/drivers/mtd/nand/cmx270-nand.c - * - * Copyright (C) 2006 Compulab, Ltd. - * Mike Rapoport <mike@compulab.co.il> - * - * Derived from drivers/mtd/nand/h1910.c - * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) - * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Overview: - * This is a device driver for the NAND flash device found on the - * CM-X270 board. - */ - -#include <linux/mtd/nand.h> -#include <linux/mtd/partitions.h> -#include <linux/slab.h> -#include <linux/gpio.h> -#include <linux/module.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/mach-types.h> - -#include <mach/pxa2xx-regs.h> - -#define GPIO_NAND_CS (11) -#define GPIO_NAND_RB (89) - -/* MTD structure for CM-X270 board */ -static struct mtd_info *cmx270_nand_mtd; - -/* remaped IO address of the device */ -static void __iomem *cmx270_nand_io; - -/* - * Define static partitions for flash device - */ -static struct mtd_partition partition_info[] = { - [0] = { - .name = "cmx270-0", - .offset = 0, - .size = MTDPART_SIZ_FULL - } -}; -#define NUM_PARTITIONS (ARRAY_SIZE(partition_info)) - -static u_char cmx270_read_byte(struct mtd_info *mtd) -{ - struct nand_chip *this = mtd->priv; - - return (readl(this->IO_ADDR_R) >> 16); -} - -static void cmx270_write_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i=0; i<len; i++) - writel((*buf++ << 16), this->IO_ADDR_W); -} - -static void cmx270_read_buf(struct mtd_info *mtd, u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i=0; i<len; i++) - *buf++ = readl(this->IO_ADDR_R) >> 16; -} - -static inline void nand_cs_on(void) -{ - gpio_set_value(GPIO_NAND_CS, 0); -} - -static void nand_cs_off(void) -{ - dsb(); - - gpio_set_value(GPIO_NAND_CS, 1); -} - -/* - * hardware specific access to control-lines - */ -static void cmx270_hwcontrol(struct mtd_info *mtd, int dat, - unsigned int ctrl) -{ - struct nand_chip* this = mtd->priv; - unsigned int nandaddr = (unsigned int)this->IO_ADDR_W; - - dsb(); - - if (ctrl & NAND_CTRL_CHANGE) { - if ( ctrl & NAND_ALE ) - nandaddr |= (1 << 3); - else - nandaddr &= ~(1 << 3); - if ( ctrl & NAND_CLE ) - nandaddr |= (1 << 2); - else - nandaddr &= ~(1 << 2); - if ( ctrl & NAND_NCE ) - nand_cs_on(); - else - nand_cs_off(); - } - - dsb(); - this->IO_ADDR_W = (void __iomem*)nandaddr; - if (dat != NAND_CMD_NONE) - writel((dat << 16), this->IO_ADDR_W); - - dsb(); -} - -/* - * read device ready pin - */ -static int cmx270_device_ready(struct mtd_info *mtd) -{ - dsb(); - - return (gpio_get_value(GPIO_NAND_RB)); -} - -/* - * Main initialization routine - */ -static int __init cmx270_init(void) -{ - struct nand_chip *this; - int ret; - - if (!(machine_is_armcore() && cpu_is_pxa27x())) - return -ENODEV; - - ret = gpio_request(GPIO_NAND_CS, "NAND CS"); - if (ret) { - pr_warning("CM-X270: failed to request NAND CS gpio\n"); - return ret; - } - - gpio_direction_output(GPIO_NAND_CS, 1); - - ret = gpio_request(GPIO_NAND_RB, "NAND R/B"); - if (ret) { - pr_warning("CM-X270: failed to request NAND R/B gpio\n"); - goto err_gpio_request; - } - - gpio_direction_input(GPIO_NAND_RB); - - /* Allocate memory for MTD device structure and private data */ - cmx270_nand_mtd = kzalloc(sizeof(struct mtd_info) + - sizeof(struct nand_chip), - GFP_KERNEL); - if (!cmx270_nand_mtd) { - pr_debug("Unable to allocate CM-X270 NAND MTD device structure.\n"); - ret = -ENOMEM; - goto err_kzalloc; - } - - cmx270_nand_io = ioremap(PXA_CS1_PHYS, 12); - if (!cmx270_nand_io) { - pr_debug("Unable to ioremap NAND device\n"); - ret = -EINVAL; - goto err_ioremap; - } - - /* Get pointer to private data */ - this = (struct nand_chip *)(&cmx270_nand_mtd[1]); - - /* Link the private data with the MTD structure */ - cmx270_nand_mtd->owner = THIS_MODULE; - cmx270_nand_mtd->priv = this; - - /* insert callbacks */ - this->IO_ADDR_R = cmx270_nand_io; - this->IO_ADDR_W = cmx270_nand_io; - this->cmd_ctrl = cmx270_hwcontrol; - this->dev_ready = cmx270_device_ready; - - /* 15 us command delay time */ - this->chip_delay = 20; - this->ecc.mode = NAND_ECC_SOFT; - - /* read/write functions */ - this->read_byte = cmx270_read_byte; - this->read_buf = cmx270_read_buf; - this->write_buf = cmx270_write_buf; - - /* Scan to find existence of the device */ - if (nand_scan (cmx270_nand_mtd, 1)) { - pr_notice("No NAND device\n"); - ret = -ENXIO; - goto err_scan; - } - - /* Register the partitions */ - ret = mtd_device_parse_register(cmx270_nand_mtd, NULL, NULL, - partition_info, NUM_PARTITIONS); - if (ret) - goto err_scan; - - /* Return happy */ - return 0; - -err_scan: - iounmap(cmx270_nand_io); -err_ioremap: - kfree(cmx270_nand_mtd); -err_kzalloc: - gpio_free(GPIO_NAND_RB); -err_gpio_request: - gpio_free(GPIO_NAND_CS); - - return ret; - -} -module_init(cmx270_init); - -/* - * Clean up routine - */ -static void __exit cmx270_cleanup(void) -{ - /* Release resources, unregister device */ - nand_release(cmx270_nand_mtd); - - gpio_free(GPIO_NAND_RB); - gpio_free(GPIO_NAND_CS); - - iounmap(cmx270_nand_io); - - /* Free the MTD device structure */ - kfree (cmx270_nand_mtd); -} -module_exit(cmx270_cleanup); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); -MODULE_DESCRIPTION("NAND flash driver for Compulab CM-X270 Module"); |