mtd: rawnand: Remove the cmx270 NAND controller driver
The CM-X270 board has been removed, we can remove the custom NAND driver as well. Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200518163300.304732-1-boris.brezillon@collabora.com
This commit is contained in:
Boris Brezillon
Miquel Raynal
Родитель
e45a4b652d
Коммит
767727b927
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@ -213,10 +213,6 @@ config MTD_NAND_MLC_LPC32XX
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Please check the actual NAND chip connected and its support
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by the MLC NAND controller.
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config MTD_NAND_CM_X270
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tristate "CM-X270 modules NAND controller"
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depends on MACH_ARMCORE
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config MTD_NAND_PASEMI
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tristate "PA Semi PWRficient NAND controller"
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depends on PPC_PASEMI
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@ -25,7 +25,6 @@ obj-$(CONFIG_MTD_NAND_GPIO) += gpio.o
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omap2_nand-objs := omap2.o
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obj-$(CONFIG_MTD_NAND_OMAP2) += omap2_nand.o
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obj-$(CONFIG_MTD_NAND_OMAP_BCH_BUILD) += omap_elm.o
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obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o
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obj-$(CONFIG_MTD_NAND_MARVELL) += marvell_nand.o
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obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o
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obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o
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@ -1,236 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2006 Compulab, Ltd.
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* Mike Rapoport <mike@compulab.co.il>
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*
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* Derived from drivers/mtd/nand/h1910.c (removed in v3.10)
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* Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
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* Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
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*
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* Overview:
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* This is a device driver for the NAND flash device found on the
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* CM-X270 board.
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*/
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#include <linux/mtd/rawnand.h>
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#include <linux/mtd/partitions.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <mach/pxa2xx-regs.h>
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#define GPIO_NAND_CS (11)
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#define GPIO_NAND_RB (89)
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/* MTD structure for CM-X270 board */
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static struct mtd_info *cmx270_nand_mtd;
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/* remaped IO address of the device */
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static void __iomem *cmx270_nand_io;
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/*
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* Define static partitions for flash device
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*/
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static const struct mtd_partition partition_info[] = {
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[0] = {
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.name = "cmx270-0",
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.offset = 0,
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.size = MTDPART_SIZ_FULL
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}
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};
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#define NUM_PARTITIONS (ARRAY_SIZE(partition_info))
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static u_char cmx270_read_byte(struct nand_chip *this)
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{
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return (readl(this->legacy.IO_ADDR_R) >> 16);
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}
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static void cmx270_write_buf(struct nand_chip *this, const u_char *buf,
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int len)
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{
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int i;
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for (i=0; i<len; i++)
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writel((*buf++ << 16), this->legacy.IO_ADDR_W);
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}
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static void cmx270_read_buf(struct nand_chip *this, u_char *buf, int len)
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{
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int i;
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for (i=0; i<len; i++)
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*buf++ = readl(this->legacy.IO_ADDR_R) >> 16;
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}
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static inline void nand_cs_on(void)
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{
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gpio_set_value(GPIO_NAND_CS, 0);
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}
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static void nand_cs_off(void)
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{
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dsb();
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gpio_set_value(GPIO_NAND_CS, 1);
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}
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/*
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* hardware specific access to control-lines
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*/
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static void cmx270_hwcontrol(struct nand_chip *this, int dat,
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unsigned int ctrl)
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{
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unsigned int nandaddr = (unsigned int)this->legacy.IO_ADDR_W;
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dsb();
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if (ctrl & NAND_CTRL_CHANGE) {
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if ( ctrl & NAND_ALE )
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nandaddr |= (1 << 3);
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else
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nandaddr &= ~(1 << 3);
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if ( ctrl & NAND_CLE )
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nandaddr |= (1 << 2);
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else
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nandaddr &= ~(1 << 2);
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if ( ctrl & NAND_NCE )
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nand_cs_on();
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else
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nand_cs_off();
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}
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dsb();
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this->legacy.IO_ADDR_W = (void __iomem*)nandaddr;
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if (dat != NAND_CMD_NONE)
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writel((dat << 16), this->legacy.IO_ADDR_W);
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dsb();
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}
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/*
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* read device ready pin
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*/
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static int cmx270_device_ready(struct nand_chip *this)
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{
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dsb();
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return (gpio_get_value(GPIO_NAND_RB));
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}
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/*
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* Main initialization routine
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*/
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static int __init cmx270_init(void)
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{
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struct nand_chip *this;
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int ret;
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if (!(machine_is_armcore() && cpu_is_pxa27x()))
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return -ENODEV;
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ret = gpio_request(GPIO_NAND_CS, "NAND CS");
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if (ret) {
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pr_warn("CM-X270: failed to request NAND CS gpio\n");
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return ret;
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}
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gpio_direction_output(GPIO_NAND_CS, 1);
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ret = gpio_request(GPIO_NAND_RB, "NAND R/B");
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if (ret) {
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pr_warn("CM-X270: failed to request NAND R/B gpio\n");
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goto err_gpio_request;
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}
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gpio_direction_input(GPIO_NAND_RB);
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/* Allocate memory for MTD device structure and private data */
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this = kzalloc(sizeof(struct nand_chip), GFP_KERNEL);
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if (!this) {
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ret = -ENOMEM;
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goto err_kzalloc;
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}
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cmx270_nand_io = ioremap(PXA_CS1_PHYS, 12);
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if (!cmx270_nand_io) {
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pr_debug("Unable to ioremap NAND device\n");
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ret = -EINVAL;
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goto err_ioremap;
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}
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cmx270_nand_mtd = nand_to_mtd(this);
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/* Link the private data with the MTD structure */
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cmx270_nand_mtd->owner = THIS_MODULE;
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/* insert callbacks */
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this->legacy.IO_ADDR_R = cmx270_nand_io;
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this->legacy.IO_ADDR_W = cmx270_nand_io;
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this->legacy.cmd_ctrl = cmx270_hwcontrol;
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this->legacy.dev_ready = cmx270_device_ready;
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/* 15 us command delay time */
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this->legacy.chip_delay = 20;
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this->ecc.mode = NAND_ECC_SOFT;
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this->ecc.algo = NAND_ECC_HAMMING;
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/* read/write functions */
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this->legacy.read_byte = cmx270_read_byte;
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this->legacy.read_buf = cmx270_read_buf;
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this->legacy.write_buf = cmx270_write_buf;
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/* Scan to find existence of the device */
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ret = nand_scan(this, 1);
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if (ret) {
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pr_notice("No NAND device\n");
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goto err_scan;
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}
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/* Register the partitions */
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ret = mtd_device_register(cmx270_nand_mtd, partition_info,
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NUM_PARTITIONS);
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if (ret)
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goto err_scan;
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/* Return happy */
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return 0;
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err_scan:
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iounmap(cmx270_nand_io);
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err_ioremap:
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kfree(this);
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err_kzalloc:
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gpio_free(GPIO_NAND_RB);
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err_gpio_request:
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gpio_free(GPIO_NAND_CS);
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return ret;
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}
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module_init(cmx270_init);
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/*
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* Clean up routine
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*/
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static void __exit cmx270_cleanup(void)
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{
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/* Release resources, unregister device */
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nand_release(mtd_to_nand(cmx270_nand_mtd));
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gpio_free(GPIO_NAND_RB);
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gpio_free(GPIO_NAND_CS);
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iounmap(cmx270_nand_io);
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kfree(mtd_to_nand(cmx270_nand_mtd));
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}
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module_exit(cmx270_cleanup);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
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MODULE_DESCRIPTION("NAND flash driver for Compulab CM-X270 Module");
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