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Subject[PATCH v3 4/4] mtd: spi-nor: remove mtk-quadspi driver
Date
This driver is superseded by the new spi-mtk-nor driver.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
---
Change since v2:
none

Change since v1:
new patch

drivers/mtd/spi-nor/Kconfig | 8 -
drivers/mtd/spi-nor/Makefile | 1 -
drivers/mtd/spi-nor/mtk-quadspi.c | 565 ------------------------------
3 files changed, 574 deletions(-)
delete mode 100644 drivers/mtd/spi-nor/mtk-quadspi.c

diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
index c1eda67d1ad2..267b9000782e 100644
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -52,14 +52,6 @@ config SPI_HISI_SFC
help
This enables support for HiSilicon FMC SPI-NOR flash controller.

-config SPI_MTK_QUADSPI
- tristate "MediaTek Quad SPI controller"
- depends on HAS_IOMEM
- help
- This enables support for the Quad SPI controller in master mode.
- This controller does not support generic SPI. It only supports
- SPI NOR.
-
config SPI_NXP_SPIFI
tristate "NXP SPI Flash Interface (SPIFI)"
depends on OF && (ARCH_LPC18XX || COMPILE_TEST)
diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index 9c5ed03cdc19..738dfd74cf76 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -3,7 +3,6 @@ obj-$(CONFIG_MTD_SPI_NOR) += spi-nor.o
obj-$(CONFIG_SPI_ASPEED_SMC) += aspeed-smc.o
obj-$(CONFIG_SPI_CADENCE_QUADSPI) += cadence-quadspi.o
obj-$(CONFIG_SPI_HISI_SFC) += hisi-sfc.o
-obj-$(CONFIG_SPI_MTK_QUADSPI) += mtk-quadspi.o
obj-$(CONFIG_SPI_NXP_SPIFI) += nxp-spifi.o
obj-$(CONFIG_SPI_INTEL_SPI) += intel-spi.o
obj-$(CONFIG_SPI_INTEL_SPI_PCI) += intel-spi-pci.o
diff --git a/drivers/mtd/spi-nor/mtk-quadspi.c b/drivers/mtd/spi-nor/mtk-quadspi.c
deleted file mode 100644
index b1691680d174..000000000000
--- a/drivers/mtd/spi-nor/mtk-quadspi.c
+++ /dev/null
@@ -1,565 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2015 MediaTek Inc.
- * Author: Bayi Cheng <bayi.cheng@mediatek.com>
- */
-
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/iopoll.h>
-#include <linux/ioport.h>
-#include <linux/math64.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/spi-nor.h>
-
-#define MTK_NOR_CMD_REG 0x00
-#define MTK_NOR_CNT_REG 0x04
-#define MTK_NOR_RDSR_REG 0x08
-#define MTK_NOR_RDATA_REG 0x0c
-#define MTK_NOR_RADR0_REG 0x10
-#define MTK_NOR_RADR1_REG 0x14
-#define MTK_NOR_RADR2_REG 0x18
-#define MTK_NOR_WDATA_REG 0x1c
-#define MTK_NOR_PRGDATA0_REG 0x20
-#define MTK_NOR_PRGDATA1_REG 0x24
-#define MTK_NOR_PRGDATA2_REG 0x28
-#define MTK_NOR_PRGDATA3_REG 0x2c
-#define MTK_NOR_PRGDATA4_REG 0x30
-#define MTK_NOR_PRGDATA5_REG 0x34
-#define MTK_NOR_SHREG0_REG 0x38
-#define MTK_NOR_SHREG1_REG 0x3c
-#define MTK_NOR_SHREG2_REG 0x40
-#define MTK_NOR_SHREG3_REG 0x44
-#define MTK_NOR_SHREG4_REG 0x48
-#define MTK_NOR_SHREG5_REG 0x4c
-#define MTK_NOR_SHREG6_REG 0x50
-#define MTK_NOR_SHREG7_REG 0x54
-#define MTK_NOR_SHREG8_REG 0x58
-#define MTK_NOR_SHREG9_REG 0x5c
-#define MTK_NOR_CFG1_REG 0x60
-#define MTK_NOR_CFG2_REG 0x64
-#define MTK_NOR_CFG3_REG 0x68
-#define MTK_NOR_STATUS0_REG 0x70
-#define MTK_NOR_STATUS1_REG 0x74
-#define MTK_NOR_STATUS2_REG 0x78
-#define MTK_NOR_STATUS3_REG 0x7c
-#define MTK_NOR_FLHCFG_REG 0x84
-#define MTK_NOR_TIME_REG 0x94
-#define MTK_NOR_PP_DATA_REG 0x98
-#define MTK_NOR_PREBUF_STUS_REG 0x9c
-#define MTK_NOR_DELSEL0_REG 0xa0
-#define MTK_NOR_DELSEL1_REG 0xa4
-#define MTK_NOR_INTRSTUS_REG 0xa8
-#define MTK_NOR_INTREN_REG 0xac
-#define MTK_NOR_CHKSUM_CTL_REG 0xb8
-#define MTK_NOR_CHKSUM_REG 0xbc
-#define MTK_NOR_CMD2_REG 0xc0
-#define MTK_NOR_WRPROT_REG 0xc4
-#define MTK_NOR_RADR3_REG 0xc8
-#define MTK_NOR_DUAL_REG 0xcc
-#define MTK_NOR_DELSEL2_REG 0xd0
-#define MTK_NOR_DELSEL3_REG 0xd4
-#define MTK_NOR_DELSEL4_REG 0xd8
-
-/* commands for mtk nor controller */
-#define MTK_NOR_READ_CMD 0x0
-#define MTK_NOR_RDSR_CMD 0x2
-#define MTK_NOR_PRG_CMD 0x4
-#define MTK_NOR_WR_CMD 0x10
-#define MTK_NOR_PIO_WR_CMD 0x90
-#define MTK_NOR_WRSR_CMD 0x20
-#define MTK_NOR_PIO_READ_CMD 0x81
-#define MTK_NOR_WR_BUF_ENABLE 0x1
-#define MTK_NOR_WR_BUF_DISABLE 0x0
-#define MTK_NOR_ENABLE_SF_CMD 0x30
-#define MTK_NOR_DUAD_ADDR_EN 0x8
-#define MTK_NOR_QUAD_READ_EN 0x4
-#define MTK_NOR_DUAL_ADDR_EN 0x2
-#define MTK_NOR_DUAL_READ_EN 0x1
-#define MTK_NOR_DUAL_DISABLE 0x0
-#define MTK_NOR_FAST_READ 0x1
-
-#define SFLASH_WRBUF_SIZE 128
-
-/* Can shift up to 48 bits (6 bytes) of TX/RX */
-#define MTK_NOR_MAX_RX_TX_SHIFT 6
-/* can shift up to 56 bits (7 bytes) transfer by MTK_NOR_PRG_CMD */
-#define MTK_NOR_MAX_SHIFT 7
-/* nor controller 4-byte address mode enable bit */
-#define MTK_NOR_4B_ADDR_EN BIT(4)
-
-/* Helpers for accessing the program data / shift data registers */
-#define MTK_NOR_PRG_REG(n) (MTK_NOR_PRGDATA0_REG + 4 * (n))
-#define MTK_NOR_SHREG(n) (MTK_NOR_SHREG0_REG + 4 * (n))
-
-struct mtk_nor {
- struct spi_nor nor;
- struct device *dev;
- void __iomem *base; /* nor flash base address */
- struct clk *spi_clk;
- struct clk *nor_clk;
-};
-
-static void mtk_nor_set_read_mode(struct mtk_nor *mtk_nor)
-{
- struct spi_nor *nor = &mtk_nor->nor;
-
- switch (nor->read_proto) {
- case SNOR_PROTO_1_1_1:
- writeb(nor->read_opcode, mtk_nor->base +
- MTK_NOR_PRGDATA3_REG);
- writeb(MTK_NOR_FAST_READ, mtk_nor->base +
- MTK_NOR_CFG1_REG);
- break;
- case SNOR_PROTO_1_1_2:
- writeb(nor->read_opcode, mtk_nor->base +
- MTK_NOR_PRGDATA3_REG);
- writeb(MTK_NOR_DUAL_READ_EN, mtk_nor->base +
- MTK_NOR_DUAL_REG);
- break;
- case SNOR_PROTO_1_1_4:
- writeb(nor->read_opcode, mtk_nor->base +
- MTK_NOR_PRGDATA4_REG);
- writeb(MTK_NOR_QUAD_READ_EN, mtk_nor->base +
- MTK_NOR_DUAL_REG);
- break;
- default:
- writeb(MTK_NOR_DUAL_DISABLE, mtk_nor->base +
- MTK_NOR_DUAL_REG);
- break;
- }
-}
-
-static int mtk_nor_execute_cmd(struct mtk_nor *mtk_nor, u8 cmdval)
-{
- int reg;
- u8 val = cmdval & 0x1f;
-
- writeb(cmdval, mtk_nor->base + MTK_NOR_CMD_REG);
- return readl_poll_timeout(mtk_nor->base + MTK_NOR_CMD_REG, reg,
- !(reg & val), 100, 10000);
-}
-
-static int mtk_nor_do_tx_rx(struct mtk_nor *mtk_nor, u8 op,
- const u8 *tx, size_t txlen, u8 *rx, size_t rxlen)
-{
- size_t len = 1 + txlen + rxlen;
- int i, ret, idx;
-
- if (len > MTK_NOR_MAX_SHIFT)
- return -EINVAL;
-
- writeb(len * 8, mtk_nor->base + MTK_NOR_CNT_REG);
-
- /* start at PRGDATA5, go down to PRGDATA0 */
- idx = MTK_NOR_MAX_RX_TX_SHIFT - 1;
-
- /* opcode */
- writeb(op, mtk_nor->base + MTK_NOR_PRG_REG(idx));
- idx--;
-
- /* program TX data */
- for (i = 0; i < txlen; i++, idx--)
- writeb(tx[i], mtk_nor->base + MTK_NOR_PRG_REG(idx));
-
- /* clear out rest of TX registers */
- while (idx >= 0) {
- writeb(0, mtk_nor->base + MTK_NOR_PRG_REG(idx));
- idx--;
- }
-
- ret = mtk_nor_execute_cmd(mtk_nor, MTK_NOR_PRG_CMD);
- if (ret)
- return ret;
-
- /* restart at first RX byte */
- idx = rxlen - 1;
-
- /* read out RX data */
- for (i = 0; i < rxlen; i++, idx--)
- rx[i] = readb(mtk_nor->base + MTK_NOR_SHREG(idx));
-
- return 0;
-}
-
-/* Do a WRSR (Write Status Register) command */
-static int mtk_nor_wr_sr(struct mtk_nor *mtk_nor, const u8 sr)
-{
- writeb(sr, mtk_nor->base + MTK_NOR_PRGDATA5_REG);
- writeb(8, mtk_nor->base + MTK_NOR_CNT_REG);
- return mtk_nor_execute_cmd(mtk_nor, MTK_NOR_WRSR_CMD);
-}
-
-static int mtk_nor_write_buffer_enable(struct mtk_nor *mtk_nor)
-{
- u8 reg;
-
- /* the bit0 of MTK_NOR_CFG2_REG is pre-fetch buffer
- * 0: pre-fetch buffer use for read
- * 1: pre-fetch buffer use for page program
- */
- writel(MTK_NOR_WR_BUF_ENABLE, mtk_nor->base + MTK_NOR_CFG2_REG);
- return readb_poll_timeout(mtk_nor->base + MTK_NOR_CFG2_REG, reg,
- 0x01 == (reg & 0x01), 100, 10000);
-}
-
-static int mtk_nor_write_buffer_disable(struct mtk_nor *mtk_nor)
-{
- u8 reg;
-
- writel(MTK_NOR_WR_BUF_DISABLE, mtk_nor->base + MTK_NOR_CFG2_REG);
- return readb_poll_timeout(mtk_nor->base + MTK_NOR_CFG2_REG, reg,
- MTK_NOR_WR_BUF_DISABLE == (reg & 0x1), 100,
- 10000);
-}
-
-static void mtk_nor_set_addr_width(struct mtk_nor *mtk_nor)
-{
- u8 val;
- struct spi_nor *nor = &mtk_nor->nor;
-
- val = readb(mtk_nor->base + MTK_NOR_DUAL_REG);
-
- switch (nor->addr_width) {
- case 3:
- val &= ~MTK_NOR_4B_ADDR_EN;
- break;
- case 4:
- val |= MTK_NOR_4B_ADDR_EN;
- break;
- default:
- dev_warn(mtk_nor->dev, "Unexpected address width %u.\n",
- nor->addr_width);
- break;
- }
-
- writeb(val, mtk_nor->base + MTK_NOR_DUAL_REG);
-}
-
-static void mtk_nor_set_addr(struct mtk_nor *mtk_nor, u32 addr)
-{
- int i;
-
- mtk_nor_set_addr_width(mtk_nor);
-
- for (i = 0; i < 3; i++) {
- writeb(addr & 0xff, mtk_nor->base + MTK_NOR_RADR0_REG + i * 4);
- addr >>= 8;
- }
- /* Last register is non-contiguous */
- writeb(addr & 0xff, mtk_nor->base + MTK_NOR_RADR3_REG);
-}
-
-static ssize_t mtk_nor_read(struct spi_nor *nor, loff_t from, size_t length,
- u_char *buffer)
-{
- int i, ret;
- int addr = (int)from;
- u8 *buf = (u8 *)buffer;
- struct mtk_nor *mtk_nor = nor->priv;
-
- /* set mode for fast read mode ,dual mode or quad mode */
- mtk_nor_set_read_mode(mtk_nor);
- mtk_nor_set_addr(mtk_nor, addr);
-
- for (i = 0; i < length; i++) {
- ret = mtk_nor_execute_cmd(mtk_nor, MTK_NOR_PIO_READ_CMD);
- if (ret < 0)
- return ret;
- buf[i] = readb(mtk_nor->base + MTK_NOR_RDATA_REG);
- }
- return length;
-}
-
-static int mtk_nor_write_single_byte(struct mtk_nor *mtk_nor,
- int addr, int length, u8 *data)
-{
- int i, ret;
-
- mtk_nor_set_addr(mtk_nor, addr);
-
- for (i = 0; i < length; i++) {
- writeb(*data++, mtk_nor->base + MTK_NOR_WDATA_REG);
- ret = mtk_nor_execute_cmd(mtk_nor, MTK_NOR_PIO_WR_CMD);
- if (ret < 0)
- return ret;
- }
- return 0;
-}
-
-static int mtk_nor_write_buffer(struct mtk_nor *mtk_nor, int addr,
- const u8 *buf)
-{
- int i, bufidx, data;
-
- mtk_nor_set_addr(mtk_nor, addr);
-
- bufidx = 0;
- for (i = 0; i < SFLASH_WRBUF_SIZE; i += 4) {
- data = buf[bufidx + 3]<<24 | buf[bufidx + 2]<<16 |
- buf[bufidx + 1]<<8 | buf[bufidx];
- bufidx += 4;
- writel(data, mtk_nor->base + MTK_NOR_PP_DATA_REG);
- }
- return mtk_nor_execute_cmd(mtk_nor, MTK_NOR_WR_CMD);
-}
-
-static ssize_t mtk_nor_write(struct spi_nor *nor, loff_t to, size_t len,
- const u_char *buf)
-{
- int ret;
- struct mtk_nor *mtk_nor = nor->priv;
- size_t i;
-
- ret = mtk_nor_write_buffer_enable(mtk_nor);
- if (ret < 0) {
- dev_warn(mtk_nor->dev, "write buffer enable failed!\n");
- return ret;
- }
-
- for (i = 0; i + SFLASH_WRBUF_SIZE <= len; i += SFLASH_WRBUF_SIZE) {
- ret = mtk_nor_write_buffer(mtk_nor, to, buf);
- if (ret < 0) {
- dev_err(mtk_nor->dev, "write buffer failed!\n");
- return ret;
- }
- to += SFLASH_WRBUF_SIZE;
- buf += SFLASH_WRBUF_SIZE;
- }
- ret = mtk_nor_write_buffer_disable(mtk_nor);
- if (ret < 0) {
- dev_warn(mtk_nor->dev, "write buffer disable failed!\n");
- return ret;
- }
-
- if (i < len) {
- ret = mtk_nor_write_single_byte(mtk_nor, to,
- (int)(len - i), (u8 *)buf);
- if (ret < 0) {
- dev_err(mtk_nor->dev, "write single byte failed!\n");
- return ret;
- }
- }
-
- return len;
-}
-
-static int mtk_nor_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, size_t len)
-{
- int ret;
- struct mtk_nor *mtk_nor = nor->priv;
-
- switch (opcode) {
- case SPINOR_OP_RDSR:
- ret = mtk_nor_execute_cmd(mtk_nor, MTK_NOR_RDSR_CMD);
- if (ret < 0)
- return ret;
- if (len == 1)
- *buf = readb(mtk_nor->base + MTK_NOR_RDSR_REG);
- else
- dev_err(mtk_nor->dev, "len should be 1 for read status!\n");
- break;
- default:
- ret = mtk_nor_do_tx_rx(mtk_nor, opcode, NULL, 0, buf, len);
- break;
- }
- return ret;
-}
-
-static int mtk_nor_write_reg(struct spi_nor *nor, u8 opcode, const u8 *buf,
- size_t len)
-{
- int ret;
- struct mtk_nor *mtk_nor = nor->priv;
-
- switch (opcode) {
- case SPINOR_OP_WRSR:
- /* We only handle 1 byte */
- ret = mtk_nor_wr_sr(mtk_nor, *buf);
- break;
- default:
- ret = mtk_nor_do_tx_rx(mtk_nor, opcode, buf, len, NULL, 0);
- if (ret)
- dev_warn(mtk_nor->dev, "write reg failure!\n");
- break;
- }
- return ret;
-}
-
-static void mtk_nor_disable_clk(struct mtk_nor *mtk_nor)
-{
- clk_disable_unprepare(mtk_nor->spi_clk);
- clk_disable_unprepare(mtk_nor->nor_clk);
-}
-
-static int mtk_nor_enable_clk(struct mtk_nor *mtk_nor)
-{
- int ret;
-
- ret = clk_prepare_enable(mtk_nor->spi_clk);
- if (ret)
- return ret;
-
- ret = clk_prepare_enable(mtk_nor->nor_clk);
- if (ret) {
- clk_disable_unprepare(mtk_nor->spi_clk);
- return ret;
- }
-
- return 0;
-}
-
-static const struct spi_nor_controller_ops mtk_controller_ops = {
- .read_reg = mtk_nor_read_reg,
- .write_reg = mtk_nor_write_reg,
- .read = mtk_nor_read,
- .write = mtk_nor_write,
-};
-
-static int mtk_nor_init(struct mtk_nor *mtk_nor,
- struct device_node *flash_node)
-{
- const struct spi_nor_hwcaps hwcaps = {
- .mask = SNOR_HWCAPS_READ |
- SNOR_HWCAPS_READ_FAST |
- SNOR_HWCAPS_READ_1_1_2 |
- SNOR_HWCAPS_PP,
- };
- int ret;
- struct spi_nor *nor;
-
- /* initialize controller to accept commands */
- writel(MTK_NOR_ENABLE_SF_CMD, mtk_nor->base + MTK_NOR_WRPROT_REG);
-
- nor = &mtk_nor->nor;
- nor->dev = mtk_nor->dev;
- nor->priv = mtk_nor;
- spi_nor_set_flash_node(nor, flash_node);
- nor->controller_ops = &mtk_controller_ops;
-
- nor->mtd.name = "mtk_nor";
- /* initialized with NULL */
- ret = spi_nor_scan(nor, NULL, &hwcaps);
- if (ret)
- return ret;
-
- return mtd_device_register(&nor->mtd, NULL, 0);
-}
-
-static int mtk_nor_drv_probe(struct platform_device *pdev)
-{
- struct device_node *flash_np;
- struct resource *res;
- int ret;
- struct mtk_nor *mtk_nor;
-
- if (!pdev->dev.of_node) {
- dev_err(&pdev->dev, "No DT found\n");
- return -EINVAL;
- }
-
- mtk_nor = devm_kzalloc(&pdev->dev, sizeof(*mtk_nor), GFP_KERNEL);
- if (!mtk_nor)
- return -ENOMEM;
- platform_set_drvdata(pdev, mtk_nor);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mtk_nor->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(mtk_nor->base))
- return PTR_ERR(mtk_nor->base);
-
- mtk_nor->spi_clk = devm_clk_get(&pdev->dev, "spi");
- if (IS_ERR(mtk_nor->spi_clk))
- return PTR_ERR(mtk_nor->spi_clk);
-
- mtk_nor->nor_clk = devm_clk_get(&pdev->dev, "sf");
- if (IS_ERR(mtk_nor->nor_clk))
- return PTR_ERR(mtk_nor->nor_clk);
-
- mtk_nor->dev = &pdev->dev;
-
- ret = mtk_nor_enable_clk(mtk_nor);
- if (ret)
- return ret;
-
- /* only support one attached flash */
- flash_np = of_get_next_available_child(pdev->dev.of_node, NULL);
- if (!flash_np) {
- dev_err(&pdev->dev, "no SPI flash device to configure\n");
- ret = -ENODEV;
- goto nor_free;
- }
- ret = mtk_nor_init(mtk_nor, flash_np);
-
-nor_free:
- if (ret)
- mtk_nor_disable_clk(mtk_nor);
-
- return ret;
-}
-
-static int mtk_nor_drv_remove(struct platform_device *pdev)
-{
- struct mtk_nor *mtk_nor = platform_get_drvdata(pdev);
-
- mtk_nor_disable_clk(mtk_nor);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int mtk_nor_suspend(struct device *dev)
-{
- struct mtk_nor *mtk_nor = dev_get_drvdata(dev);
-
- mtk_nor_disable_clk(mtk_nor);
-
- return 0;
-}
-
-static int mtk_nor_resume(struct device *dev)
-{
- struct mtk_nor *mtk_nor = dev_get_drvdata(dev);
-
- return mtk_nor_enable_clk(mtk_nor);
-}
-
-static const struct dev_pm_ops mtk_nor_dev_pm_ops = {
- .suspend = mtk_nor_suspend,
- .resume = mtk_nor_resume,
-};
-
-#define MTK_NOR_DEV_PM_OPS (&mtk_nor_dev_pm_ops)
-#else
-#define MTK_NOR_DEV_PM_OPS NULL
-#endif
-
-static const struct of_device_id mtk_nor_of_ids[] = {
- { .compatible = "mediatek,mt8173-nor"},
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, mtk_nor_of_ids);
-
-static struct platform_driver mtk_nor_driver = {
- .probe = mtk_nor_drv_probe,
- .remove = mtk_nor_drv_remove,
- .driver = {
- .name = "mtk-nor",
- .pm = MTK_NOR_DEV_PM_OPS,
- .of_match_table = mtk_nor_of_ids,
- },
-};
-
-module_platform_driver(mtk_nor_driver);
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MediaTek SPI NOR Flash Driver");
--
2.24.1
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