mtd: tegra-nor: Remove old tegra mapping driver

Remove old tegra mapping driver.
Bug 1352942

Change-Id: I606b526e02a5e7ac84bb4023ebd058a286d55ef9
Signed-off-by: Ashwin Joshi <asjoshi@nvidia.com>
Reviewed-on: http://git-master/r/359298
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

2 files changed, 0 insertions, 501 deletions

diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 3d0c78b3633d..3b1102008647 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -47,5 +47,4 @@ obj-$(CONFIG_MTD_GPIO_ADDR)	+= gpio-addr-flash.o
 obj-$(CONFIG_MTD_LATCH_ADDR)	+= latch-addr-flash.o
 obj-$(CONFIG_MTD_LANTIQ)	+= lantiq-flash.o
 CFLAGS_tegra_nor.o		= -Werror
-obj-$(CONFIG_MTD_NOR_TEGRA)	+= tegra_nor.o
 obj-$(CONFIG_MTD_NOR_TEGRA_GMI)	+= tegra_nor_gmi.o
diff --git a/drivers/mtd/maps/tegra_nor.c b/drivers/mtd/maps/tegra_nor.c
deleted file mode 100644
index 318cd244d179..000000000000
--- a/drivers/mtd/maps/tegra_nor.c
+++ /dev/null
@@ -1,500 +0,0 @@
-/*
- * Copyright (C) 2009-2013, NVIDIA Corporation.  All rights reserved.
- *
- * Author:
- *	Raghavendra VK <rvk@nvidia.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.
- *
- * 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; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- *
- * drivers/mtd/maps/tegra_nor.c
- *
- * MTD mapping driver for the internal SNOR controller in Tegra SoCs
- *
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/mutex.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/dma-mapping.h>
-#include <linux/proc_fs.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-#include <linux/clk.h>
-#include <linux/platform_data/tegra_nor.h>
-#include <asm/cacheflush.h>
-#include <linux/tegra_snor.h>
-
-struct tegra_nor_info {
-	struct tegra_nor_platform_data *plat;
-	struct device *dev;
-	struct clk *clk;
-	struct mtd_partition *parts;
-	struct mtd_info *mtd;
-	struct map_info map;
-	struct completion dma_complete;
-	void __iomem *base;
-	void *dma_virt_buffer;
-	dma_addr_t dma_phys_buffer;
-	u32 init_config;
-	u32 timing0_default, timing1_default;
-	u32 timing0_read, timing1_read;
-	u32 suspend_config;
-};
-
-static inline unsigned long snor_tegra_readl(struct tegra_nor_info *tnor,
-					     unsigned long reg)
-{
-	return readl(tnor->base + reg);
-}
-
-static inline void snor_tegra_writel(struct tegra_nor_info *tnor,
-				     unsigned long val, unsigned long reg)
-{
-	writel(val, tnor->base + reg);
-}
-
-#define DRV_NAME "tegra-nor"
-
-static const char *part_probes[] = { "cmdlinepart", NULL };
-
-static int wait_for_dma_completion(struct tegra_nor_info *info)
-{
-	unsigned long dma_timeout;
-	int ret;
-
-	dma_timeout = msecs_to_jiffies(TEGRA_SNOR_DMA_TIMEOUT_MS);
-	ret = wait_for_completion_timeout(&info->dma_complete, dma_timeout);
-	return ret ? 0 : -ETIMEDOUT;
-}
-
-static void tegra_flash_dma(struct map_info *map,
-			    void *to, unsigned long from, ssize_t len)
-{
-	u32 snor_config, dma_config = 0;
-	int dma_transfer_count = 0, word32_count = 0;
-	u32 nor_address, current_transfer = 0;
-	u32 copy_to = (u32)to;
-	struct tegra_nor_info *c =
-	    container_of(map, struct tegra_nor_info, map);
-	struct tegra_nor_chip_parms *chip_parm = &c->plat->chip_parms;
-	unsigned int bytes_remaining = len;
-
-	snor_config = c->init_config;
-	snor_tegra_writel(c, c->timing0_read, TEGRA_SNOR_TIMING0_REG);
-	snor_tegra_writel(c, c->timing1_read, TEGRA_SNOR_TIMING1_REG);
-
-	if (len > 32) {
-		word32_count = len >> 2;
-		bytes_remaining = len & 0x00000003;
-		/*
-		 * The parameters can be setup in any order since we write to
-		 * controller register only after all parameters are set.
-		 */
-		/* SNOR CONFIGURATION SETUP */
-		switch (chip_parm->ReadMode) {
-		case NorReadMode_Async:
-			snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(0);
-			break;
-
-		case NorReadMode_Page:
-			switch (chip_parm->PageLength) {
-			case NorPageLength_Unsupported:
-				snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(0);
-				break;
-
-			case NorPageLength_4Word:
-				snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(1);
-				snor_config |= TEGRA_SNOR_CONFIG_PAGE_SZ(1);
-				break;
-
-			case NorPageLength_8Word:
-				snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(1);
-				snor_config |= TEGRA_SNOR_CONFIG_PAGE_SZ(2);
-				break;
-			case NorPageLength_16Word:
-				snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(1);
-				snor_config |= TEGRA_SNOR_CONFIG_PAGE_SZ(3);
-				break;
-			}
-			break;
-
-		case NorReadMode_Burst:
-			snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(2);
-			switch (chip_parm->BurstLength) {
-			case NorBurstLength_CntBurst:
-				snor_config |= TEGRA_SNOR_CONFIG_BURST_LEN(0);
-				break;
-			case NorBurstLength_8Word:
-				snor_config |= TEGRA_SNOR_CONFIG_BURST_LEN(1);
-				break;
-
-			case NorBurstLength_16Word:
-				snor_config |= TEGRA_SNOR_CONFIG_BURST_LEN(2);
-				break;
-
-			case NorBurstLength_32Word:
-				snor_config |= TEGRA_SNOR_CONFIG_BURST_LEN(3);
-				break;
-			}
-			break;
-		}
-		snor_config |= TEGRA_SNOR_CONFIG_MST_ENB;
-		/* SNOR DMA CONFIGURATION SETUP */
-		/* NOR -> AHB */
-		dma_config &= ~TEGRA_SNOR_DMA_CFG_DIR;
-		/* One word burst */
-		dma_config |= TEGRA_SNOR_DMA_CFG_BRST_SZ(4);
-
-		for (nor_address = (unsigned int)(map->phys + from);
-		     word32_count > 0;
-		     word32_count -= current_transfer,
-		     dma_transfer_count += current_transfer,
-		     nor_address += (current_transfer * 4),
-		     copy_to += (current_transfer * 4)) {
-
-			current_transfer =
-			    (word32_count > TEGRA_SNOR_DMA_LIMIT_WORDS)
-			    ? (TEGRA_SNOR_DMA_LIMIT_WORDS) : word32_count;
-			/* Start NOR operation */
-			snor_config |= TEGRA_SNOR_CONFIG_GO;
-			dma_config |= TEGRA_SNOR_DMA_CFG_GO;
-			/* Enable interrupt before every transaction since the
-			 * interrupt handler disables it */
-			dma_config |= TEGRA_SNOR_DMA_CFG_INT_ENB;
-			/* Num of AHB (32-bit) words to transferred minus 1 */
-			dma_config |=
-			    TEGRA_SNOR_DMA_CFG_WRD_CNT(current_transfer - 1);
-			snor_tegra_writel(c, c->dma_phys_buffer,
-					  TEGRA_SNOR_AHB_ADDR_PTR_REG);
-			snor_tegra_writel(c, nor_address,
-					  TEGRA_SNOR_NOR_ADDR_PTR_REG);
-			snor_tegra_writel(c, snor_config,
-					  TEGRA_SNOR_CONFIG_REG);
-			snor_tegra_writel(c, dma_config,
-					  TEGRA_SNOR_DMA_CFG_REG);
-			if (wait_for_dma_completion(c)) {
-				dev_err(c->dev, "timout waiting for DMA\n");
-				/* Transfer the remaining words by memcpy */
-				bytes_remaining += (word32_count << 2);
-				break;
-			}
-			dma_sync_single_for_cpu(c->dev, c->dma_phys_buffer,
-				(current_transfer << 2), DMA_FROM_DEVICE);
-			memcpy((char *)(copy_to), (char *)(c->dma_virt_buffer),
-				(current_transfer << 2));
-
-		}
-	}
-	/* Put the controller back into slave mode. */
-	snor_config = snor_tegra_readl(c, TEGRA_SNOR_CONFIG_REG);
-	snor_config &= ~TEGRA_SNOR_CONFIG_MST_ENB;
-	snor_config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(0);
-	snor_tegra_writel(c, snor_config, TEGRA_SNOR_CONFIG_REG);
-
-	memcpy_fromio(((char *)to + (dma_transfer_count << 2)),
-		      ((char *)(map->virt + from) + (dma_transfer_count << 2)),
-		      bytes_remaining);
-
-	snor_tegra_writel(c, c->timing0_default, TEGRA_SNOR_TIMING0_REG);
-	snor_tegra_writel(c, c->timing1_default, TEGRA_SNOR_TIMING1_REG);
-}
-
-static irqreturn_t tegra_nor_isr(int flag, void *dev_id)
-{
-	struct tegra_nor_info *info = (struct tegra_nor_info *)dev_id;
-	u32 dma_config = snor_tegra_readl(info, TEGRA_SNOR_DMA_CFG_REG);
-	if (dma_config & TEGRA_SNOR_DMA_CFG_INT_STA) {
-		/* Disable interrupts. WAR for BUG:821560 */
-		dma_config &= ~TEGRA_SNOR_DMA_CFG_INT_ENB;
-		snor_tegra_writel(info, dma_config, TEGRA_SNOR_DMA_CFG_REG);
-		complete(&info->dma_complete);
-	} else {
-		pr_err("%s: Spurious interrupt\n", __func__);
-	}
-	return IRQ_HANDLED;
-}
-
-static int tegra_snor_controller_init(struct tegra_nor_info *info)
-{
-	struct tegra_nor_chip_parms *chip_parm = &info->plat->chip_parms;
-	u32 width = info->plat->flash.width;
-	u32 config = 0;
-
-	config |= TEGRA_SNOR_CONFIG_DEVICE_MODE(0);
-	config |= TEGRA_SNOR_CONFIG_SNOR_CS(0);
-	config &= ~TEGRA_SNOR_CONFIG_DEVICE_TYPE;	/* Select NOR */
-	config |= TEGRA_SNOR_CONFIG_WP;	/* Enable writes */
-	switch (width) {
-	case 2:
-		config &= ~TEGRA_SNOR_CONFIG_WORDWIDE;	/* 16 bit */
-		break;
-	case 4:
-		config |= TEGRA_SNOR_CONFIG_WORDWIDE;	/* 32 bit */
-		break;
-	default:
-		return -EINVAL;
-	}
-	switch (chip_parm->MuxMode) {
-	case NorMuxMode_ADNonMux:
-		config &= ~TEGRA_SNOR_CONFIG_MUX_MODE;
-		break;
-	case NorMuxMode_ADMux:
-		config |= TEGRA_SNOR_CONFIG_MUX_MODE;
-		break;
-	default:
-		return -EINVAL;
-	}
-	switch (chip_parm->ReadyActive) {
-	case NorReadyActive_WithData:
-		config &= ~TEGRA_SNOR_CONFIG_RDY_ACTIVE;
-		break;
-	case NorReadyActive_BeforeData:
-		config |= TEGRA_SNOR_CONFIG_RDY_ACTIVE;
-		break;
-	default:
-		return -EINVAL;
-	}
-	snor_tegra_writel(info, config, TEGRA_SNOR_CONFIG_REG);
-	info->init_config = config;
-
-	info->timing0_default = chip_parm->timing_default.timing0;
-	info->timing0_read = chip_parm->timing_read.timing0;
-	info->timing1_default = chip_parm->timing_default.timing1;
-	info->timing1_read = chip_parm->timing_read.timing1;
-
-	snor_tegra_writel(info, info->timing1_default, TEGRA_SNOR_TIMING1_REG);
-	snor_tegra_writel(info, info->timing0_default, TEGRA_SNOR_TIMING0_REG);
-	return 0;
-}
-
-static int tegra_nor_probe(struct platform_device *pdev)
-{
-	int err = 0;
-	struct tegra_nor_platform_data *plat = pdev->dev.platform_data;
-	struct tegra_nor_info *info = NULL;
-	struct device *dev = &pdev->dev;
-	struct resource *res;
-	int irq;
-
-	if (!plat) {
-		pr_err("%s: no platform device info\n", __func__);
-		err = -EINVAL;
-		goto fail;
-	}
-
-	info = devm_kzalloc(dev, sizeof(struct tegra_nor_info),
-			    GFP_KERNEL);
-	if (!info) {
-		err = -ENOMEM;
-		goto fail;
-	}
-
-	/* Get NOR controller & map the same */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "no mem resource?\n");
-		err = -ENODEV;
-		goto fail;
-	}
-
-	if (!devm_request_mem_region(dev, res->start, resource_size(res),
-				     dev_name(&pdev->dev))) {
-		dev_err(dev, "NOR region already claimed\n");
-		err = -EBUSY;
-		goto fail;
-	}
-
-	info->base = devm_ioremap(dev, res->start, resource_size(res));
-	if (!info->base) {
-		dev_err(dev, "Can't ioremap NOR region\n");
-		err = -ENOMEM;
-		goto fail;
-	}
-
-	/* Get NOR flash aperture & map the same */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (!res) {
-		dev_err(dev, "no mem resource?\n");
-		err = -ENODEV;
-		goto fail;
-	}
-
-	if (!devm_request_mem_region(dev, res->start, resource_size(res),
-				     dev_name(dev))) {
-		dev_err(dev, "NOR region already claimed\n");
-		err = -EBUSY;
-		goto fail;
-	}
-
-	info->map.virt = devm_ioremap(dev, res->start,
-				      resource_size(res));
-	if (!info->map.virt) {
-		dev_err(dev, "Can't ioremap NOR region\n");
-		err = -ENOMEM;
-		goto fail;
-	}
-
-	info->plat = plat;
-	info->dev = dev;
-	info->map.bankwidth = plat->flash.width;
-	info->map.name = dev_name(dev);
-	info->map.phys = res->start;
-	info->map.size = resource_size(res);
-
-	info->clk = clk_get(dev, NULL);
-	if (IS_ERR(info->clk)) {
-		err = PTR_ERR(info->clk);
-		goto fail;
-	}
-
-	err = clk_prepare_enable(info->clk);
-	if (err != 0)
-		goto out_clk_put;
-
-	simple_map_init(&info->map);
-	info->map.copy_from = tegra_flash_dma;
-
-	/* Intialise the SNOR controller before probe */
-	err = tegra_snor_controller_init(info);
-	if (err) {
-		dev_err(dev, "Error initializing controller\n");
-		goto out_clk_disable;
-	}
-
-	init_completion(&info->dma_complete);
-
-	irq = platform_get_irq(pdev, 0);
-	if (!irq) {
-		dev_err(dev, "no irq resource?\n");
-		err = -ENODEV;
-		goto out_clk_disable;
-	}
-
-	/* Register SNOR DMA completion interrupt */
-	err = devm_request_irq(dev, irq, tegra_nor_isr, IRQF_DISABLED,
-			dev_name(dev), info);
-	if (err) {
-		dev_err(dev, "Failed to request irq %i\n", irq);
-		goto out_clk_disable;
-	}
-	info->dma_virt_buffer = dma_alloc_coherent(dev,
-							TEGRA_SNOR_DMA_LIMIT,
-							&info->dma_phys_buffer,
-							GFP_KERNEL);
-	if (info->dma_virt_buffer == NULL) {
-		dev_err(&pdev->dev, "Could not allocate buffer for DMA");
-		err = -ENOMEM;
-		goto out_clk_disable;
-	}
-
-	info->mtd = do_map_probe(plat->flash.map_name, &info->map);
-	if (!info->mtd) {
-		err = -EIO;
-		goto out_dma_free_coherent;
-	}
-	info->mtd->owner = THIS_MODULE;
-	info->parts = NULL;
-
-	platform_set_drvdata(pdev, info);
-	mtd_device_parse_register(info->mtd, part_probes, NULL, info->parts, 0);
-
-	return 0;
-
-out_dma_free_coherent:
-	dma_free_coherent(dev, TEGRA_SNOR_DMA_LIMIT,
-				info->dma_virt_buffer, info->dma_phys_buffer);
-out_clk_disable:
-	clk_disable_unprepare(info->clk);
-out_clk_put:
-	clk_put(info->clk);
-fail:
-	pr_err("Tegra NOR probe failed\n");
-	return err;
-}
-
-static int tegra_nor_remove(struct platform_device *pdev)
-{
-	struct tegra_nor_info *info = platform_get_drvdata(pdev);
-
-	mtd_device_unregister(info->mtd);
-	kfree(info->parts);
-	dma_free_coherent(&pdev->dev, TEGRA_SNOR_DMA_LIMIT,
-				info->dma_virt_buffer, info->dma_phys_buffer);
-	map_destroy(info->mtd);
-	clk_disable_unprepare(info->clk);
-	clk_put(info->clk);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int tegra_nor_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct tegra_nor_info *info = platform_get_drvdata(pdev);
-	info->suspend_config = snor_tegra_readl(info, TEGRA_SNOR_CONFIG_REG);
-	return 0;
-}
-
-static int tegra_nor_resume(struct platform_device *pdev)
-{
-	struct tegra_nor_info *info = platform_get_drvdata(pdev);
-
-	snor_tegra_writel(info, info->suspend_config, TEGRA_SNOR_CONFIG_REG);
-	snor_tegra_writel(info, info->timing1_default, TEGRA_SNOR_TIMING1_REG);
-	snor_tegra_writel(info, info->timing0_default, TEGRA_SNOR_TIMING0_REG);
-	return 0;
-}
-#endif
-
-static struct platform_driver __refdata tegra_nor_driver = {
-	.probe = tegra_nor_probe,
-	.remove = tegra_nor_remove,
-#ifdef CONFIG_PM
-	.suspend = tegra_nor_suspend,
-	.resume = tegra_nor_resume,
-#endif
-	.driver = {
-		   .name = DRV_NAME,
-		   .owner = THIS_MODULE,
-		   },
-};
-
-static int __init tegra_nor_init(void)
-{
-	return platform_driver_register(&tegra_nor_driver);
-}
-
-static void __exit tegra_nor_exit(void)
-{
-	platform_driver_unregister(&tegra_nor_driver);
-}
-
-module_init(tegra_nor_init);
-module_exit(tegra_nor_exit);
-
-MODULE_AUTHOR("Raghavendra VK <rvk@nvidia.com>");
-MODULE_DESCRIPTION("NOR Flash mapping driver for NVIDIA Tegra based boards");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRV_NAME);