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author | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-02-05 23:02:04 +0100 |
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committer | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-02-16 10:09:34 +0100 |
commit | 93db446a424cee9387b532995e6b516667079555 (patch) | |
tree | 39c7900ae38d890fb971ea5fc6f194f7e66fa797 /drivers/mtd/nand/fsl_upm.c | |
parent | mtd: nand: Add missing copyright information (diff) | |
download | linux-dev-93db446a424cee9387b532995e6b516667079555.tar.xz linux-dev-93db446a424cee9387b532995e6b516667079555.zip |
mtd: nand: move raw NAND related code to the raw/ subdir
As part of the process of sharing more code between different NAND
based devices, we need to move all raw NAND related code to the raw/
subdirectory.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Diffstat (limited to 'drivers/mtd/nand/fsl_upm.c')
-rw-r--r-- | drivers/mtd/nand/fsl_upm.c | 363 |
1 files changed, 0 insertions, 363 deletions
diff --git a/drivers/mtd/nand/fsl_upm.c b/drivers/mtd/nand/fsl_upm.c deleted file mode 100644 index a88e2cf66e0f..000000000000 --- a/drivers/mtd/nand/fsl_upm.c +++ /dev/null @@ -1,363 +0,0 @@ -/* - * Freescale UPM NAND driver. - * - * Copyright © 2007-2008 MontaVista Software, Inc. - * - * Author: Anton Vorontsov <avorontsov@ru.mvista.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; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/mtd/rawnand.h> -#include <linux/mtd/nand_ecc.h> -#include <linux/mtd/partitions.h> -#include <linux/mtd/mtd.h> -#include <linux/of_address.h> -#include <linux/of_platform.h> -#include <linux/of_gpio.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <asm/fsl_lbc.h> - -#define FSL_UPM_WAIT_RUN_PATTERN 0x1 -#define FSL_UPM_WAIT_WRITE_BYTE 0x2 -#define FSL_UPM_WAIT_WRITE_BUFFER 0x4 - -struct fsl_upm_nand { - struct device *dev; - struct nand_chip chip; - int last_ctrl; - struct mtd_partition *parts; - struct fsl_upm upm; - uint8_t upm_addr_offset; - uint8_t upm_cmd_offset; - void __iomem *io_base; - int rnb_gpio[NAND_MAX_CHIPS]; - uint32_t mchip_offsets[NAND_MAX_CHIPS]; - uint32_t mchip_count; - uint32_t mchip_number; - int chip_delay; - uint32_t wait_flags; -}; - -static inline struct fsl_upm_nand *to_fsl_upm_nand(struct mtd_info *mtdinfo) -{ - return container_of(mtd_to_nand(mtdinfo), struct fsl_upm_nand, - chip); -} - -static int fun_chip_ready(struct mtd_info *mtd) -{ - struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); - - if (gpio_get_value(fun->rnb_gpio[fun->mchip_number])) - return 1; - - dev_vdbg(fun->dev, "busy\n"); - return 0; -} - -static void fun_wait_rnb(struct fsl_upm_nand *fun) -{ - if (fun->rnb_gpio[fun->mchip_number] >= 0) { - struct mtd_info *mtd = nand_to_mtd(&fun->chip); - int cnt = 1000000; - - while (--cnt && !fun_chip_ready(mtd)) - cpu_relax(); - if (!cnt) - dev_err(fun->dev, "tired waiting for RNB\n"); - } else { - ndelay(100); - } -} - -static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); - u32 mar; - - if (!(ctrl & fun->last_ctrl)) { - fsl_upm_end_pattern(&fun->upm); - - if (cmd == NAND_CMD_NONE) - return; - - fun->last_ctrl = ctrl & (NAND_ALE | NAND_CLE); - } - - if (ctrl & NAND_CTRL_CHANGE) { - if (ctrl & NAND_ALE) - fsl_upm_start_pattern(&fun->upm, fun->upm_addr_offset); - else if (ctrl & NAND_CLE) - fsl_upm_start_pattern(&fun->upm, fun->upm_cmd_offset); - } - - mar = (cmd << (32 - fun->upm.width)) | - fun->mchip_offsets[fun->mchip_number]; - fsl_upm_run_pattern(&fun->upm, chip->IO_ADDR_R, mar); - - if (fun->wait_flags & FSL_UPM_WAIT_RUN_PATTERN) - fun_wait_rnb(fun); -} - -static void fun_select_chip(struct mtd_info *mtd, int mchip_nr) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); - - if (mchip_nr == -1) { - chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); - } else if (mchip_nr >= 0 && mchip_nr < NAND_MAX_CHIPS) { - fun->mchip_number = mchip_nr; - chip->IO_ADDR_R = fun->io_base + fun->mchip_offsets[mchip_nr]; - chip->IO_ADDR_W = chip->IO_ADDR_R; - } else { - BUG(); - } -} - -static uint8_t fun_read_byte(struct mtd_info *mtd) -{ - struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); - - return in_8(fun->chip.IO_ADDR_R); -} - -static void fun_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) -{ - struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); - int i; - - for (i = 0; i < len; i++) - buf[i] = in_8(fun->chip.IO_ADDR_R); -} - -static void fun_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) -{ - struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd); - int i; - - for (i = 0; i < len; i++) { - out_8(fun->chip.IO_ADDR_W, buf[i]); - if (fun->wait_flags & FSL_UPM_WAIT_WRITE_BYTE) - fun_wait_rnb(fun); - } - if (fun->wait_flags & FSL_UPM_WAIT_WRITE_BUFFER) - fun_wait_rnb(fun); -} - -static int fun_chip_init(struct fsl_upm_nand *fun, - const struct device_node *upm_np, - const struct resource *io_res) -{ - struct mtd_info *mtd = nand_to_mtd(&fun->chip); - int ret; - struct device_node *flash_np; - - fun->chip.IO_ADDR_R = fun->io_base; - fun->chip.IO_ADDR_W = fun->io_base; - fun->chip.cmd_ctrl = fun_cmd_ctrl; - fun->chip.chip_delay = fun->chip_delay; - fun->chip.read_byte = fun_read_byte; - fun->chip.read_buf = fun_read_buf; - fun->chip.write_buf = fun_write_buf; - fun->chip.ecc.mode = NAND_ECC_SOFT; - fun->chip.ecc.algo = NAND_ECC_HAMMING; - if (fun->mchip_count > 1) - fun->chip.select_chip = fun_select_chip; - - if (fun->rnb_gpio[0] >= 0) - fun->chip.dev_ready = fun_chip_ready; - - mtd->dev.parent = fun->dev; - - flash_np = of_get_next_child(upm_np, NULL); - if (!flash_np) - return -ENODEV; - - nand_set_flash_node(&fun->chip, flash_np); - mtd->name = kasprintf(GFP_KERNEL, "0x%llx.%s", (u64)io_res->start, - flash_np->name); - if (!mtd->name) { - ret = -ENOMEM; - goto err; - } - - ret = nand_scan(mtd, fun->mchip_count); - if (ret) - goto err; - - ret = mtd_device_register(mtd, NULL, 0); -err: - of_node_put(flash_np); - if (ret) - kfree(mtd->name); - return ret; -} - -static int fun_probe(struct platform_device *ofdev) -{ - struct fsl_upm_nand *fun; - struct resource io_res; - const __be32 *prop; - int rnb_gpio; - int ret; - int size; - int i; - - fun = kzalloc(sizeof(*fun), GFP_KERNEL); - if (!fun) - return -ENOMEM; - - ret = of_address_to_resource(ofdev->dev.of_node, 0, &io_res); - if (ret) { - dev_err(&ofdev->dev, "can't get IO base\n"); - goto err1; - } - - ret = fsl_upm_find(io_res.start, &fun->upm); - if (ret) { - dev_err(&ofdev->dev, "can't find UPM\n"); - goto err1; - } - - prop = of_get_property(ofdev->dev.of_node, "fsl,upm-addr-offset", - &size); - if (!prop || size != sizeof(uint32_t)) { - dev_err(&ofdev->dev, "can't get UPM address offset\n"); - ret = -EINVAL; - goto err1; - } - fun->upm_addr_offset = *prop; - - prop = of_get_property(ofdev->dev.of_node, "fsl,upm-cmd-offset", &size); - if (!prop || size != sizeof(uint32_t)) { - dev_err(&ofdev->dev, "can't get UPM command offset\n"); - ret = -EINVAL; - goto err1; - } - fun->upm_cmd_offset = *prop; - - prop = of_get_property(ofdev->dev.of_node, - "fsl,upm-addr-line-cs-offsets", &size); - if (prop && (size / sizeof(uint32_t)) > 0) { - fun->mchip_count = size / sizeof(uint32_t); - if (fun->mchip_count >= NAND_MAX_CHIPS) { - dev_err(&ofdev->dev, "too much multiple chips\n"); - goto err1; - } - for (i = 0; i < fun->mchip_count; i++) - fun->mchip_offsets[i] = be32_to_cpu(prop[i]); - } else { - fun->mchip_count = 1; - } - - for (i = 0; i < fun->mchip_count; i++) { - fun->rnb_gpio[i] = -1; - rnb_gpio = of_get_gpio(ofdev->dev.of_node, i); - if (rnb_gpio >= 0) { - ret = gpio_request(rnb_gpio, dev_name(&ofdev->dev)); - if (ret) { - dev_err(&ofdev->dev, - "can't request RNB gpio #%d\n", i); - goto err2; - } - gpio_direction_input(rnb_gpio); - fun->rnb_gpio[i] = rnb_gpio; - } else if (rnb_gpio == -EINVAL) { - dev_err(&ofdev->dev, "RNB gpio #%d is invalid\n", i); - goto err2; - } - } - - prop = of_get_property(ofdev->dev.of_node, "chip-delay", NULL); - if (prop) - fun->chip_delay = be32_to_cpup(prop); - else - fun->chip_delay = 50; - - prop = of_get_property(ofdev->dev.of_node, "fsl,upm-wait-flags", &size); - if (prop && size == sizeof(uint32_t)) - fun->wait_flags = be32_to_cpup(prop); - else - fun->wait_flags = FSL_UPM_WAIT_RUN_PATTERN | - FSL_UPM_WAIT_WRITE_BYTE; - - fun->io_base = devm_ioremap_nocache(&ofdev->dev, io_res.start, - resource_size(&io_res)); - if (!fun->io_base) { - ret = -ENOMEM; - goto err2; - } - - fun->dev = &ofdev->dev; - fun->last_ctrl = NAND_CLE; - - ret = fun_chip_init(fun, ofdev->dev.of_node, &io_res); - if (ret) - goto err2; - - dev_set_drvdata(&ofdev->dev, fun); - - return 0; -err2: - for (i = 0; i < fun->mchip_count; i++) { - if (fun->rnb_gpio[i] < 0) - break; - gpio_free(fun->rnb_gpio[i]); - } -err1: - kfree(fun); - - return ret; -} - -static int fun_remove(struct platform_device *ofdev) -{ - struct fsl_upm_nand *fun = dev_get_drvdata(&ofdev->dev); - struct mtd_info *mtd = nand_to_mtd(&fun->chip); - int i; - - nand_release(mtd); - kfree(mtd->name); - - for (i = 0; i < fun->mchip_count; i++) { - if (fun->rnb_gpio[i] < 0) - break; - gpio_free(fun->rnb_gpio[i]); - } - - kfree(fun); - - return 0; -} - -static const struct of_device_id of_fun_match[] = { - { .compatible = "fsl,upm-nand" }, - {}, -}; -MODULE_DEVICE_TABLE(of, of_fun_match); - -static struct platform_driver of_fun_driver = { - .driver = { - .name = "fsl,upm-nand", - .of_match_table = of_fun_match, - }, - .probe = fun_probe, - .remove = fun_remove, -}; - -module_platform_driver(of_fun_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); -MODULE_DESCRIPTION("Driver for NAND chips working through Freescale " - "LocalBus User-Programmable Machine"); |