diff options
Diffstat (limited to 'drivers/mtd/nand/orion_nand.c')
| -rw-r--r-- | drivers/mtd/nand/orion_nand.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c deleted file mode 100644 index 7825fd3ce66b..000000000000 --- a/drivers/mtd/nand/orion_nand.c +++ /dev/null @@ -1,232 +0,0 @@ -/* - * NAND support for Marvell Orion SoC platforms - * - * Tzachi Perelstein <tzachi@marvell.com> - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ - -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/of.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/rawnand.h> -#include <linux/mtd/partitions.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/io.h> -#include <asm/sizes.h> -#include <linux/platform_data/mtd-orion_nand.h> - -struct orion_nand_info { - struct nand_chip chip; - struct clk *clk; -}; - -static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) -{ - struct nand_chip *nc = mtd_to_nand(mtd); - struct orion_nand_data *board = nand_get_controller_data(nc); - u32 offs; - - if (cmd == NAND_CMD_NONE) - return; - - if (ctrl & NAND_CLE) - offs = (1 << board->cle); - else if (ctrl & NAND_ALE) - offs = (1 << board->ale); - else - return; - - if (nc->options & NAND_BUSWIDTH_16) - offs <<= 1; - - writeb(cmd, nc->IO_ADDR_W + offs); -} - -static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - void __iomem *io_base = chip->IO_ADDR_R; -#if __LINUX_ARM_ARCH__ >= 5 - uint64_t *buf64; -#endif - int i = 0; - - while (len && (unsigned long)buf & 7) { - *buf++ = readb(io_base); - len--; - } -#if __LINUX_ARM_ARCH__ >= 5 - buf64 = (uint64_t *)buf; - while (i < len/8) { - /* - * Since GCC has no proper constraint (PR 43518) - * force x variable to r2/r3 registers as ldrd instruction - * requires first register to be even. - */ - register uint64_t x asm ("r2"); - - asm volatile ("ldrd\t%0, [%1]" : "=&r" (x) : "r" (io_base)); - buf64[i++] = x; - } - i *= 8; -#else - readsl(io_base, buf, len/4); - i = len / 4 * 4; -#endif - while (i < len) - buf[i++] = readb(io_base); -} - -static int __init orion_nand_probe(struct platform_device *pdev) -{ - struct orion_nand_info *info; - struct mtd_info *mtd; - struct nand_chip *nc; - struct orion_nand_data *board; - struct resource *res; - void __iomem *io_base; - int ret = 0; - u32 val = 0; - - info = devm_kzalloc(&pdev->dev, - sizeof(struct orion_nand_info), - GFP_KERNEL); - if (!info) - return -ENOMEM; - nc = &info->chip; - mtd = nand_to_mtd(nc); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - io_base = devm_ioremap_resource(&pdev->dev, res); - - if (IS_ERR(io_base)) - return PTR_ERR(io_base); - - if (pdev->dev.of_node) { - board = devm_kzalloc(&pdev->dev, sizeof(struct orion_nand_data), - GFP_KERNEL); - if (!board) - return -ENOMEM; - if (!of_property_read_u32(pdev->dev.of_node, "cle", &val)) - board->cle = (u8)val; - else - board->cle = 0; - if (!of_property_read_u32(pdev->dev.of_node, "ale", &val)) - board->ale = (u8)val; - else - board->ale = 1; - if (!of_property_read_u32(pdev->dev.of_node, - "bank-width", &val)) - board->width = (u8)val * 8; - else - board->width = 8; - if (!of_property_read_u32(pdev->dev.of_node, - "chip-delay", &val)) - board->chip_delay = (u8)val; - } else { - board = dev_get_platdata(&pdev->dev); - } - - mtd->dev.parent = &pdev->dev; - - nand_set_controller_data(nc, board); - nand_set_flash_node(nc, pdev->dev.of_node); - nc->IO_ADDR_R = nc->IO_ADDR_W = io_base; - nc->cmd_ctrl = orion_nand_cmd_ctrl; - nc->read_buf = orion_nand_read_buf; - nc->ecc.mode = NAND_ECC_SOFT; - nc->ecc.algo = NAND_ECC_HAMMING; - - if (board->chip_delay) - nc->chip_delay = board->chip_delay; - - WARN(board->width > 16, - "%d bit bus width out of range", - board->width); - - if (board->width == 16) - nc->options |= NAND_BUSWIDTH_16; - - if (board->dev_ready) - nc->dev_ready = board->dev_ready; - - platform_set_drvdata(pdev, info); - - /* Not all platforms can gate the clock, so it is not - an error if the clock does not exists. */ - info->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(info->clk)) { - ret = PTR_ERR(info->clk); - if (ret == -ENOENT) { - info->clk = NULL; - } else { - dev_err(&pdev->dev, "failed to get clock!\n"); - return ret; - } - } - - ret = clk_prepare_enable(info->clk); - if (ret) { - dev_err(&pdev->dev, "failed to prepare clock!\n"); - return ret; - } - - ret = nand_scan(mtd, 1); - if (ret) - goto no_dev; - - mtd->name = "orion_nand"; - ret = mtd_device_register(mtd, board->parts, board->nr_parts); - if (ret) { - nand_release(mtd); - goto no_dev; - } - - return 0; - -no_dev: - clk_disable_unprepare(info->clk); - return ret; -} - -static int orion_nand_remove(struct platform_device *pdev) -{ - struct orion_nand_info *info = platform_get_drvdata(pdev); - struct nand_chip *chip = &info->chip; - struct mtd_info *mtd = nand_to_mtd(chip); - - nand_release(mtd); - - clk_disable_unprepare(info->clk); - - return 0; -} - -#ifdef CONFIG_OF -static const struct of_device_id orion_nand_of_match_table[] = { - { .compatible = "marvell,orion-nand", }, - {}, -}; -MODULE_DEVICE_TABLE(of, orion_nand_of_match_table); -#endif - -static struct platform_driver orion_nand_driver = { - .remove = orion_nand_remove, - .driver = { - .name = "orion_nand", - .of_match_table = of_match_ptr(orion_nand_of_match_table), - }, -}; - -module_platform_driver_probe(orion_nand_driver, orion_nand_probe); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Tzachi Perelstein"); -MODULE_DESCRIPTION("NAND glue for Orion platforms"); -MODULE_ALIAS("platform:orion_nand"); |