diff options
Diffstat (limited to 'drivers/mtd/nand/nand_orion.c')
| -rw-r--r-- | drivers/mtd/nand/nand_orion.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/drivers/mtd/nand/nand_orion.c b/drivers/mtd/nand/nand_orion.c deleted file mode 100644 index c8b89cd03c..0000000000 --- a/drivers/mtd/nand/nand_orion.c +++ /dev/null @@ -1,160 +0,0 @@ -/* - * (C) Copyright 2014, Ezequiel Garcia <ezequiel.garcia@free-electrons.com> - * - * Based on Orion NAND driver from Linux (drivers/mtd/nand/orion_nand.c): - * Author: 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 <common.h> -#include <driver.h> -#include <malloc.h> -#include <init.h> -#include <io.h> -#include <of_mtd.h> -#include <errno.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/nand.h> -#include <linux/clk.h> - -struct orion_nand { - struct nand_chip chip; - - u8 ale; /* address line number connected to ALE */ - u8 cle; /* address line number connected to CLE */ -}; - -static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct orion_nand *priv = chip->priv; - u32 offs; - - if (cmd == NAND_CMD_NONE) - return; - - if (ctrl & NAND_CLE) - offs = (1 << priv->cle); - else if (ctrl & NAND_ALE) - offs = (1 << priv->ale); - else - return; - - if (chip->options & NAND_BUSWIDTH_16) - offs <<= 1; - - writeb(cmd, chip->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; - uint64_t *buf64; - int i = 0; - - while (len && (unsigned long)buf & 7) { - *buf++ = readb(io_base); - len--; - } - 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; - while (i < len) - buf[i++] = readb(io_base); -} - -static int orion_nand_probe(struct device_d *dev) -{ - struct resource *iores; - struct device_node *dev_node = dev->device_node; - struct orion_nand *priv; - struct mtd_info *mtd; - struct nand_chip *chip; - struct clk *clk; - void __iomem *io_base; - int width, ret; - u32 val = 0; - - priv = xzalloc(sizeof(struct orion_nand)); - mtd = &priv->chip.mtd; - chip = &priv->chip; - - iores = dev_request_mem_resource(dev, 0); - if (IS_ERR(iores)) - return PTR_ERR(iores); - io_base = IOMEM(iores->start); - - if (!of_property_read_u32(dev_node, "cle", &val)) - priv->cle = (u8)val; - else - priv->cle = 0; - - if (!of_property_read_u32(dev_node, "ale", &val)) - priv->ale = (u8)val; - else - priv->ale = 1; - - if (!of_property_read_u32(dev_node, "bank-width", &val)) - width = (u8)val * 8; - else - width = 8; - - if (!of_property_read_u32(dev_node, "chip-delay", &val)) - chip->chip_delay = (u8)val; - - mtd->parent = dev; - chip->priv = priv; - chip->IO_ADDR_R = chip->IO_ADDR_W = io_base; - chip->cmd_ctrl = orion_nand_cmd_ctrl; - chip->read_buf = orion_nand_read_buf; - chip->ecc.mode = NAND_ECC_SOFT; - - WARN(width > 16, "%d bit bus width out of range", width); - if (width == 16) - chip->options |= NAND_BUSWIDTH_16; - - /* Not all platforms can gate the clock, so this is optional */ - clk = clk_get(dev, 0); - if (!IS_ERR(clk)) - clk_enable(clk); - - if (nand_scan(mtd, 1)) { - ret = -ENXIO; - goto no_dev; - } - - add_mtd_nand_device(mtd, "orion_nand"); - return 0; -no_dev: - if (!IS_ERR(clk)) - clk_disable(clk); - - free(priv); - return ret; -} - -static __maybe_unused struct of_device_id orion_nand_compatible[] = { - { .compatible = "marvell,orion-nand", }, - {}, -}; - -static struct driver_d orion_nand_driver = { - .name = "orion_nand", - .probe = orion_nand_probe, - .of_compatible = DRV_OF_COMPAT(orion_nand_compatible), -}; -device_platform_driver(orion_nand_driver); |