mtd: Move onenand code base to drivers/mtd/nand/onenand

Move onenand code base to the drivers/mtd/nand directory in the hope
that someday someone will patch it to use the generic NAND helpers.
If it never happens, at least we'll have all NAND related support in a
single directory and not spread over the drivers/mtd/ directory.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>

1 files changed, 0 insertions, 660 deletions

diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
deleted file mode 100644
index 9c159f0dd9a6..000000000000
--- a/drivers/mtd/onenand/omap2.c
+++ /dev/null
@@ -1,660 +0,0 @@
-/*
- *  OneNAND driver for OMAP2 / OMAP3
- *
- *  Copyright © 2005-2006 Nokia Corporation
- *
- *  Author: Jarkko Lavinen <jarkko.lavinen@nokia.com> and Juha Yrjölä
- *  IRQ and DMA support written by Timo Teras
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; see the file COPYING. If not, write to the Free Software
- * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/onenand.h>
-#include <linux/mtd/partitions.h>
-#include <linux/of_device.h>
-#include <linux/omap-gpmc.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmaengine.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/gpio/consumer.h>
-
-#include <asm/mach/flash.h>
-
-#define DRIVER_NAME "omap2-onenand"
-
-#define ONENAND_BUFRAM_SIZE	(1024 * 5)
-
-struct omap2_onenand {
-	struct platform_device *pdev;
-	int gpmc_cs;
-	unsigned long phys_base;
-	struct gpio_desc *int_gpiod;
-	struct mtd_info mtd;
-	struct onenand_chip onenand;
-	struct completion irq_done;
-	struct completion dma_done;
-	struct dma_chan *dma_chan;
-};
-
-static void omap2_onenand_dma_complete_func(void *completion)
-{
-	complete(completion);
-}
-
-static irqreturn_t omap2_onenand_interrupt(int irq, void *dev_id)
-{
-	struct omap2_onenand *c = dev_id;
-
-	complete(&c->irq_done);
-
-	return IRQ_HANDLED;
-}
-
-static inline unsigned short read_reg(struct omap2_onenand *c, int reg)
-{
-	return readw(c->onenand.base + reg);
-}
-
-static inline void write_reg(struct omap2_onenand *c, unsigned short value,
-			     int reg)
-{
-	writew(value, c->onenand.base + reg);
-}
-
-static int omap2_onenand_set_cfg(struct omap2_onenand *c,
-				 bool sr, bool sw,
-				 int latency, int burst_len)
-{
-	unsigned short reg = ONENAND_SYS_CFG1_RDY | ONENAND_SYS_CFG1_INT;
-
-	reg |= latency << ONENAND_SYS_CFG1_BRL_SHIFT;
-
-	switch (burst_len) {
-	case 0:		/* continuous */
-		break;
-	case 4:
-		reg |= ONENAND_SYS_CFG1_BL_4;
-		break;
-	case 8:
-		reg |= ONENAND_SYS_CFG1_BL_8;
-		break;
-	case 16:
-		reg |= ONENAND_SYS_CFG1_BL_16;
-		break;
-	case 32:
-		reg |= ONENAND_SYS_CFG1_BL_32;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	if (latency > 5)
-		reg |= ONENAND_SYS_CFG1_HF;
-	if (latency > 7)
-		reg |= ONENAND_SYS_CFG1_VHF;
-	if (sr)
-		reg |= ONENAND_SYS_CFG1_SYNC_READ;
-	if (sw)
-		reg |= ONENAND_SYS_CFG1_SYNC_WRITE;
-
-	write_reg(c, reg, ONENAND_REG_SYS_CFG1);
-
-	return 0;
-}
-
-static int omap2_onenand_get_freq(int ver)
-{
-	switch ((ver >> 4) & 0xf) {
-	case 0:
-		return 40;
-	case 1:
-		return 54;
-	case 2:
-		return 66;
-	case 3:
-		return 83;
-	case 4:
-		return 104;
-	}
-
-	return -EINVAL;
-}
-
-static void wait_err(char *msg, int state, unsigned int ctrl, unsigned int intr)
-{
-	printk(KERN_ERR "onenand_wait: %s! state %d ctrl 0x%04x intr 0x%04x\n",
-	       msg, state, ctrl, intr);
-}
-
-static void wait_warn(char *msg, int state, unsigned int ctrl,
-		      unsigned int intr)
-{
-	printk(KERN_WARNING "onenand_wait: %s! state %d ctrl 0x%04x "
-	       "intr 0x%04x\n", msg, state, ctrl, intr);
-}
-
-static int omap2_onenand_wait(struct mtd_info *mtd, int state)
-{
-	struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
-	struct onenand_chip *this = mtd->priv;
-	unsigned int intr = 0;
-	unsigned int ctrl, ctrl_mask;
-	unsigned long timeout;
-	u32 syscfg;
-
-	if (state == FL_RESETING || state == FL_PREPARING_ERASE ||
-	    state == FL_VERIFYING_ERASE) {
-		int i = 21;
-		unsigned int intr_flags = ONENAND_INT_MASTER;
-
-		switch (state) {
-		case FL_RESETING:
-			intr_flags |= ONENAND_INT_RESET;
-			break;
-		case FL_PREPARING_ERASE:
-			intr_flags |= ONENAND_INT_ERASE;
-			break;
-		case FL_VERIFYING_ERASE:
-			i = 101;
-			break;
-		}
-
-		while (--i) {
-			udelay(1);
-			intr = read_reg(c, ONENAND_REG_INTERRUPT);
-			if (intr & ONENAND_INT_MASTER)
-				break;
-		}
-		ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
-		if (ctrl & ONENAND_CTRL_ERROR) {
-			wait_err("controller error", state, ctrl, intr);
-			return -EIO;
-		}
-		if ((intr & intr_flags) == intr_flags)
-			return 0;
-		/* Continue in wait for interrupt branch */
-	}
-
-	if (state != FL_READING) {
-		int result;
-
-		/* Turn interrupts on */
-		syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
-		if (!(syscfg & ONENAND_SYS_CFG1_IOBE)) {
-			syscfg |= ONENAND_SYS_CFG1_IOBE;
-			write_reg(c, syscfg, ONENAND_REG_SYS_CFG1);
-			/* Add a delay to let GPIO settle */
-			syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
-		}
-
-		reinit_completion(&c->irq_done);
-		result = gpiod_get_value(c->int_gpiod);
-		if (result < 0) {
-			ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
-			intr = read_reg(c, ONENAND_REG_INTERRUPT);
-			wait_err("gpio error", state, ctrl, intr);
-			return result;
-		} else if (result == 0) {
-			int retry_cnt = 0;
-retry:
-			if (!wait_for_completion_io_timeout(&c->irq_done,
-						msecs_to_jiffies(20))) {
-				/* Timeout after 20ms */
-				ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
-				if (ctrl & ONENAND_CTRL_ONGO &&
-				    !this->ongoing) {
-					/*
-					 * The operation seems to be still going
-					 * so give it some more time.
-					 */
-					retry_cnt += 1;
-					if (retry_cnt < 3)
-						goto retry;
-					intr = read_reg(c,
-							ONENAND_REG_INTERRUPT);
-					wait_err("timeout", state, ctrl, intr);
-					return -EIO;
-				}
-				intr = read_reg(c, ONENAND_REG_INTERRUPT);
-				if ((intr & ONENAND_INT_MASTER) == 0)
-					wait_warn("timeout", state, ctrl, intr);
-			}
-		}
-	} else {
-		int retry_cnt = 0;
-
-		/* Turn interrupts off */
-		syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
-		syscfg &= ~ONENAND_SYS_CFG1_IOBE;
-		write_reg(c, syscfg, ONENAND_REG_SYS_CFG1);
-
-		timeout = jiffies + msecs_to_jiffies(20);
-		while (1) {
-			if (time_before(jiffies, timeout)) {
-				intr = read_reg(c, ONENAND_REG_INTERRUPT);
-				if (intr & ONENAND_INT_MASTER)
-					break;
-			} else {
-				/* Timeout after 20ms */
-				ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
-				if (ctrl & ONENAND_CTRL_ONGO) {
-					/*
-					 * The operation seems to be still going
-					 * so give it some more time.
-					 */
-					retry_cnt += 1;
-					if (retry_cnt < 3) {
-						timeout = jiffies +
-							  msecs_to_jiffies(20);
-						continue;
-					}
-				}
-				break;
-			}
-		}
-	}
-
-	intr = read_reg(c, ONENAND_REG_INTERRUPT);
-	ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
-
-	if (intr & ONENAND_INT_READ) {
-		int ecc = read_reg(c, ONENAND_REG_ECC_STATUS);
-
-		if (ecc) {
-			unsigned int addr1, addr8;
-
-			addr1 = read_reg(c, ONENAND_REG_START_ADDRESS1);
-			addr8 = read_reg(c, ONENAND_REG_START_ADDRESS8);
-			if (ecc & ONENAND_ECC_2BIT_ALL) {
-				printk(KERN_ERR "onenand_wait: ECC error = "
-				       "0x%04x, addr1 %#x, addr8 %#x\n",
-				       ecc, addr1, addr8);
-				mtd->ecc_stats.failed++;
-				return -EBADMSG;
-			} else if (ecc & ONENAND_ECC_1BIT_ALL) {
-				printk(KERN_NOTICE "onenand_wait: correctable "
-				       "ECC error = 0x%04x, addr1 %#x, "
-				       "addr8 %#x\n", ecc, addr1, addr8);
-				mtd->ecc_stats.corrected++;
-			}
-		}
-	} else if (state == FL_READING) {
-		wait_err("timeout", state, ctrl, intr);
-		return -EIO;
-	}
-
-	if (ctrl & ONENAND_CTRL_ERROR) {
-		wait_err("controller error", state, ctrl, intr);
-		if (ctrl & ONENAND_CTRL_LOCK)
-			printk(KERN_ERR "onenand_wait: "
-					"Device is write protected!!!\n");
-		return -EIO;
-	}
-
-	ctrl_mask = 0xFE9F;
-	if (this->ongoing)
-		ctrl_mask &= ~0x8000;
-
-	if (ctrl & ctrl_mask)
-		wait_warn("unexpected controller status", state, ctrl, intr);
-
-	return 0;
-}
-
-static inline int omap2_onenand_bufferram_offset(struct mtd_info *mtd, int area)
-{
-	struct onenand_chip *this = mtd->priv;
-
-	if (ONENAND_CURRENT_BUFFERRAM(this)) {
-		if (area == ONENAND_DATARAM)
-			return this->writesize;
-		if (area == ONENAND_SPARERAM)
-			return mtd->oobsize;
-	}
-
-	return 0;
-}
-
-static inline int omap2_onenand_dma_transfer(struct omap2_onenand *c,
-					     dma_addr_t src, dma_addr_t dst,
-					     size_t count)
-{
-	struct dma_async_tx_descriptor *tx;
-	dma_cookie_t cookie;
-
-	tx = dmaengine_prep_dma_memcpy(c->dma_chan, dst, src, count, 0);
-	if (!tx) {
-		dev_err(&c->pdev->dev, "Failed to prepare DMA memcpy\n");
-		return -EIO;
-	}
-
-	reinit_completion(&c->dma_done);
-
-	tx->callback = omap2_onenand_dma_complete_func;
-	tx->callback_param = &c->dma_done;
-
-	cookie = tx->tx_submit(tx);
-	if (dma_submit_error(cookie)) {
-		dev_err(&c->pdev->dev, "Failed to do DMA tx_submit\n");
-		return -EIO;
-	}
-
-	dma_async_issue_pending(c->dma_chan);
-
-	if (!wait_for_completion_io_timeout(&c->dma_done,
-					    msecs_to_jiffies(20))) {
-		dmaengine_terminate_sync(c->dma_chan);
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-static int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area,
-					unsigned char *buffer, int offset,
-					size_t count)
-{
-	struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
-	struct onenand_chip *this = mtd->priv;
-	dma_addr_t dma_src, dma_dst;
-	int bram_offset;
-	void *buf = (void *)buffer;
-	size_t xtra;
-	int ret;
-
-	bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset;
-	if (bram_offset & 3 || (size_t)buf & 3 || count < 384)
-		goto out_copy;
-
-	/* panic_write() may be in an interrupt context */
-	if (in_interrupt() || oops_in_progress)
-		goto out_copy;
-
-	if (buf >= high_memory) {
-		struct page *p1;
-
-		if (((size_t)buf & PAGE_MASK) !=
-		    ((size_t)(buf + count - 1) & PAGE_MASK))
-			goto out_copy;
-		p1 = vmalloc_to_page(buf);
-		if (!p1)
-			goto out_copy;
-		buf = page_address(p1) + ((size_t)buf & ~PAGE_MASK);
-	}
-
-	xtra = count & 3;
-	if (xtra) {
-		count -= xtra;
-		memcpy(buf + count, this->base + bram_offset + count, xtra);
-	}
-
-	dma_src = c->phys_base + bram_offset;
-	dma_dst = dma_map_single(&c->pdev->dev, buf, count, DMA_FROM_DEVICE);
-	if (dma_mapping_error(&c->pdev->dev, dma_dst)) {
-		dev_err(&c->pdev->dev,
-			"Couldn't DMA map a %d byte buffer\n",
-			count);
-		goto out_copy;
-	}
-
-	ret = omap2_onenand_dma_transfer(c, dma_src, dma_dst, count);
-	dma_unmap_single(&c->pdev->dev, dma_dst, count, DMA_FROM_DEVICE);
-
-	if (ret) {
-		dev_err(&c->pdev->dev, "timeout waiting for DMA\n");
-		goto out_copy;
-	}
-
-	return 0;
-
-out_copy:
-	memcpy(buf, this->base + bram_offset, count);
-	return 0;
-}
-
-static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
-					 const unsigned char *buffer,
-					 int offset, size_t count)
-{
-	struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
-	struct onenand_chip *this = mtd->priv;
-	dma_addr_t dma_src, dma_dst;
-	int bram_offset;
-	void *buf = (void *)buffer;
-	int ret;
-
-	bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset;
-	if (bram_offset & 3 || (size_t)buf & 3 || count < 384)
-		goto out_copy;
-
-	/* panic_write() may be in an interrupt context */
-	if (in_interrupt() || oops_in_progress)
-		goto out_copy;
-
-	if (buf >= high_memory) {
-		struct page *p1;
-
-		if (((size_t)buf & PAGE_MASK) !=
-		    ((size_t)(buf + count - 1) & PAGE_MASK))
-			goto out_copy;
-		p1 = vmalloc_to_page(buf);
-		if (!p1)
-			goto out_copy;
-		buf = page_address(p1) + ((size_t)buf & ~PAGE_MASK);
-	}
-
-	dma_src = dma_map_single(&c->pdev->dev, buf, count, DMA_TO_DEVICE);
-	dma_dst = c->phys_base + bram_offset;
-	if (dma_mapping_error(&c->pdev->dev, dma_src)) {
-		dev_err(&c->pdev->dev,
-			"Couldn't DMA map a %d byte buffer\n",
-			count);
-		return -1;
-	}
-
-	ret = omap2_onenand_dma_transfer(c, dma_src, dma_dst, count);
-	dma_unmap_single(&c->pdev->dev, dma_src, count, DMA_TO_DEVICE);
-
-	if (ret) {
-		dev_err(&c->pdev->dev, "timeout waiting for DMA\n");
-		goto out_copy;
-	}
-
-	return 0;
-
-out_copy:
-	memcpy(this->base + bram_offset, buf, count);
-	return 0;
-}
-
-static void omap2_onenand_shutdown(struct platform_device *pdev)
-{
-	struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
-
-	/* With certain content in the buffer RAM, the OMAP boot ROM code
-	 * can recognize the flash chip incorrectly. Zero it out before
-	 * soft reset.
-	 */
-	memset((__force void *)c->onenand.base, 0, ONENAND_BUFRAM_SIZE);
-}
-
-static int omap2_onenand_probe(struct platform_device *pdev)
-{
-	u32 val;
-	dma_cap_mask_t mask;
-	int freq, latency, r;
-	struct resource *res;
-	struct omap2_onenand *c;
-	struct gpmc_onenand_info info;
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "error getting memory resource\n");
-		return -EINVAL;
-	}
-
-	r = of_property_read_u32(np, "reg", &val);
-	if (r) {
-		dev_err(dev, "reg not found in DT\n");
-		return r;
-	}
-
-	c = devm_kzalloc(dev, sizeof(struct omap2_onenand), GFP_KERNEL);
-	if (!c)
-		return -ENOMEM;
-
-	init_completion(&c->irq_done);
-	init_completion(&c->dma_done);
-	c->gpmc_cs = val;
-	c->phys_base = res->start;
-
-	c->onenand.base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(c->onenand.base))
-		return PTR_ERR(c->onenand.base);
-
-	c->int_gpiod = devm_gpiod_get_optional(dev, "int", GPIOD_IN);
-	if (IS_ERR(c->int_gpiod)) {
-		r = PTR_ERR(c->int_gpiod);
-		/* Just try again if this happens */
-		if (r != -EPROBE_DEFER)
-			dev_err(dev, "error getting gpio: %d\n", r);
-		return r;
-	}
-
-	if (c->int_gpiod) {
-		r = devm_request_irq(dev, gpiod_to_irq(c->int_gpiod),
-				     omap2_onenand_interrupt,
-				     IRQF_TRIGGER_RISING, "onenand", c);
-		if (r)
-			return r;
-
-		c->onenand.wait = omap2_onenand_wait;
-	}
-
-	dma_cap_zero(mask);
-	dma_cap_set(DMA_MEMCPY, mask);
-
-	c->dma_chan = dma_request_channel(mask, NULL, NULL);
-	if (c->dma_chan) {
-		c->onenand.read_bufferram = omap2_onenand_read_bufferram;
-		c->onenand.write_bufferram = omap2_onenand_write_bufferram;
-	}
-
-	c->pdev = pdev;
-	c->mtd.priv = &c->onenand;
-	c->mtd.dev.parent = dev;
-	mtd_set_of_node(&c->mtd, dev->of_node);
-
-	dev_info(dev, "initializing on CS%d (0x%08lx), va %p, %s mode\n",
-		 c->gpmc_cs, c->phys_base, c->onenand.base,
-		 c->dma_chan ? "DMA" : "PIO");
-
-	if ((r = onenand_scan(&c->mtd, 1)) < 0)
-		goto err_release_dma;
-
-	freq = omap2_onenand_get_freq(c->onenand.version_id);
-	if (freq > 0) {
-		switch (freq) {
-		case 104:
-			latency = 7;
-			break;
-		case 83:
-			latency = 6;
-			break;
-		case 66:
-			latency = 5;
-			break;
-		case 56:
-			latency = 4;
-			break;
-		default:	/* 40 MHz or lower */
-			latency = 3;
-			break;
-		}
-
-		r = gpmc_omap_onenand_set_timings(dev, c->gpmc_cs,
-						  freq, latency, &info);
-		if (r)
-			goto err_release_onenand;
-
-		r = omap2_onenand_set_cfg(c, info.sync_read, info.sync_write,
-					  latency, info.burst_len);
-		if (r)
-			goto err_release_onenand;
-
-		if (info.sync_read || info.sync_write)
-			dev_info(dev, "optimized timings for %d MHz\n", freq);
-	}
-
-	r = mtd_device_register(&c->mtd, NULL, 0);
-	if (r)
-		goto err_release_onenand;
-
-	platform_set_drvdata(pdev, c);
-
-	return 0;
-
-err_release_onenand:
-	onenand_release(&c->mtd);
-err_release_dma:
-	if (c->dma_chan)
-		dma_release_channel(c->dma_chan);
-
-	return r;
-}
-
-static int omap2_onenand_remove(struct platform_device *pdev)
-{
-	struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
-
-	onenand_release(&c->mtd);
-	if (c->dma_chan)
-		dma_release_channel(c->dma_chan);
-	omap2_onenand_shutdown(pdev);
-
-	return 0;
-}
-
-static const struct of_device_id omap2_onenand_id_table[] = {
-	{ .compatible = "ti,omap2-onenand", },
-	{},
-};
-MODULE_DEVICE_TABLE(of, omap2_onenand_id_table);
-
-static struct platform_driver omap2_onenand_driver = {
-	.probe		= omap2_onenand_probe,
-	.remove		= omap2_onenand_remove,
-	.shutdown	= omap2_onenand_shutdown,
-	.driver		= {
-		.name	= DRIVER_NAME,
-		.of_match_table = omap2_onenand_id_table,
-	},
-};
-
-module_platform_driver(omap2_onenand_driver);
-
-MODULE_ALIAS("platform:" DRIVER_NAME);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jarkko Lavinen <jarkko.lavinen@nokia.com>");
-MODULE_DESCRIPTION("Glue layer for OneNAND flash on OMAP2 / OMAP3");