diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/spi-nor/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/mtd/spi-nor/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/spi-nor/stm32-quadspi.c | 720 |
3 files changed, 0 insertions, 728 deletions
diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig index dab986691267..54b5da049277 100644 --- a/drivers/mtd/spi-nor/Kconfig +++ b/drivers/mtd/spi-nor/Kconfig @@ -104,11 +104,4 @@ config SPI_INTEL_SPI_PLATFORM To compile this driver as a module, choose M here: the module will be called intel-spi-platform. -config SPI_STM32_QUADSPI - tristate "STM32 Quad SPI controller" - depends on ARCH_STM32 || COMPILE_TEST - help - This enables support for the STM32 Quad SPI controller. - We only connect the NOR to this controller. - endif # MTD_SPI_NOR diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile index 189a15cca3ec..9c5ed03cdc19 100644 --- a/drivers/mtd/spi-nor/Makefile +++ b/drivers/mtd/spi-nor/Makefile @@ -8,4 +8,3 @@ obj-$(CONFIG_SPI_NXP_SPIFI) += nxp-spifi.o obj-$(CONFIG_SPI_INTEL_SPI) += intel-spi.o obj-$(CONFIG_SPI_INTEL_SPI_PCI) += intel-spi-pci.o obj-$(CONFIG_SPI_INTEL_SPI_PLATFORM) += intel-spi-platform.o -obj-$(CONFIG_SPI_STM32_QUADSPI) += stm32-quadspi.o diff --git a/drivers/mtd/spi-nor/stm32-quadspi.c b/drivers/mtd/spi-nor/stm32-quadspi.c deleted file mode 100644 index 13e9fc961d3b..000000000000 --- a/drivers/mtd/spi-nor/stm32-quadspi.c +++ /dev/null @@ -1,720 +0,0 @@ -/* - * Driver for stm32 quadspi controller - * - * Copyright (C) 2017, STMicroelectronics - All Rights Reserved - * Author(s): Ludovic Barre author <ludovic.barre@st.com>. - * - * License terms: GPL V2.0. - * - * 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. If not, see <http://www.gnu.org/licenses/>. - */ -#include <linux/clk.h> -#include <linux/errno.h> -#include <linux/io.h> -#include <linux/iopoll.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/partitions.h> -#include <linux/mtd/spi-nor.h> -#include <linux/mutex.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/platform_device.h> -#include <linux/reset.h> -#include <linux/sizes.h> - -#define QUADSPI_CR 0x00 -#define CR_EN BIT(0) -#define CR_ABORT BIT(1) -#define CR_DMAEN BIT(2) -#define CR_TCEN BIT(3) -#define CR_SSHIFT BIT(4) -#define CR_DFM BIT(6) -#define CR_FSEL BIT(7) -#define CR_FTHRES_SHIFT 8 -#define CR_FTHRES_MASK GENMASK(12, 8) -#define CR_FTHRES(n) (((n) << CR_FTHRES_SHIFT) & CR_FTHRES_MASK) -#define CR_TEIE BIT(16) -#define CR_TCIE BIT(17) -#define CR_FTIE BIT(18) -#define CR_SMIE BIT(19) -#define CR_TOIE BIT(20) -#define CR_PRESC_SHIFT 24 -#define CR_PRESC_MASK GENMASK(31, 24) -#define CR_PRESC(n) (((n) << CR_PRESC_SHIFT) & CR_PRESC_MASK) - -#define QUADSPI_DCR 0x04 -#define DCR_CSHT_SHIFT 8 -#define DCR_CSHT_MASK GENMASK(10, 8) -#define DCR_CSHT(n) (((n) << DCR_CSHT_SHIFT) & DCR_CSHT_MASK) -#define DCR_FSIZE_SHIFT 16 -#define DCR_FSIZE_MASK GENMASK(20, 16) -#define DCR_FSIZE(n) (((n) << DCR_FSIZE_SHIFT) & DCR_FSIZE_MASK) - -#define QUADSPI_SR 0x08 -#define SR_TEF BIT(0) -#define SR_TCF BIT(1) -#define SR_FTF BIT(2) -#define SR_SMF BIT(3) -#define SR_TOF BIT(4) -#define SR_BUSY BIT(5) -#define SR_FLEVEL_SHIFT 8 -#define SR_FLEVEL_MASK GENMASK(13, 8) - -#define QUADSPI_FCR 0x0c -#define FCR_CTCF BIT(1) - -#define QUADSPI_DLR 0x10 - -#define QUADSPI_CCR 0x14 -#define CCR_INST_SHIFT 0 -#define CCR_INST_MASK GENMASK(7, 0) -#define CCR_INST(n) (((n) << CCR_INST_SHIFT) & CCR_INST_MASK) -#define CCR_IMODE_NONE (0U << 8) -#define CCR_IMODE_1 (1U << 8) -#define CCR_IMODE_2 (2U << 8) -#define CCR_IMODE_4 (3U << 8) -#define CCR_ADMODE_NONE (0U << 10) -#define CCR_ADMODE_1 (1U << 10) -#define CCR_ADMODE_2 (2U << 10) -#define CCR_ADMODE_4 (3U << 10) -#define CCR_ADSIZE_SHIFT 12 -#define CCR_ADSIZE_MASK GENMASK(13, 12) -#define CCR_ADSIZE(n) (((n) << CCR_ADSIZE_SHIFT) & CCR_ADSIZE_MASK) -#define CCR_ABMODE_NONE (0U << 14) -#define CCR_ABMODE_1 (1U << 14) -#define CCR_ABMODE_2 (2U << 14) -#define CCR_ABMODE_4 (3U << 14) -#define CCR_ABSIZE_8 (0U << 16) -#define CCR_ABSIZE_16 (1U << 16) -#define CCR_ABSIZE_24 (2U << 16) -#define CCR_ABSIZE_32 (3U << 16) -#define CCR_DCYC_SHIFT 18 -#define CCR_DCYC_MASK GENMASK(22, 18) -#define CCR_DCYC(n) (((n) << CCR_DCYC_SHIFT) & CCR_DCYC_MASK) -#define CCR_DMODE_NONE (0U << 24) -#define CCR_DMODE_1 (1U << 24) -#define CCR_DMODE_2 (2U << 24) -#define CCR_DMODE_4 (3U << 24) -#define CCR_FMODE_INDW (0U << 26) -#define CCR_FMODE_INDR (1U << 26) -#define CCR_FMODE_APM (2U << 26) -#define CCR_FMODE_MM (3U << 26) - -#define QUADSPI_AR 0x18 -#define QUADSPI_ABR 0x1c -#define QUADSPI_DR 0x20 -#define QUADSPI_PSMKR 0x24 -#define QUADSPI_PSMAR 0x28 -#define QUADSPI_PIR 0x2c -#define QUADSPI_LPTR 0x30 -#define LPTR_DFT_TIMEOUT 0x10 - -#define FSIZE_VAL(size) (__fls(size) - 1) - -#define STM32_MAX_MMAP_SZ SZ_256M -#define STM32_MAX_NORCHIP 2 - -#define STM32_QSPI_FIFO_SZ 32 -#define STM32_QSPI_FIFO_TIMEOUT_US 30000 -#define STM32_QSPI_BUSY_TIMEOUT_US 100000 - -struct stm32_qspi_flash { - struct spi_nor nor; - struct stm32_qspi *qspi; - u32 cs; - u32 fsize; - u32 presc; - u32 read_mode; - bool registered; - u32 prefetch_limit; -}; - -struct stm32_qspi { - struct device *dev; - void __iomem *io_base; - void __iomem *mm_base; - resource_size_t mm_size; - u32 nor_num; - struct clk *clk; - u32 clk_rate; - struct stm32_qspi_flash flash[STM32_MAX_NORCHIP]; - struct completion cmd_completion; - - /* - * to protect device configuration, could be different between - * 2 flash access (bk1, bk2) - */ - struct mutex lock; -}; - -struct stm32_qspi_cmd { - u8 addr_width; - u8 dummy; - bool tx_data; - u8 opcode; - u32 framemode; - u32 qspimode; - u32 addr; - size_t len; - void *buf; -}; - -static int stm32_qspi_wait_cmd(struct stm32_qspi *qspi) -{ - u32 cr; - int err = 0; - - if (readl_relaxed(qspi->io_base + QUADSPI_SR) & SR_TCF) - return 0; - - reinit_completion(&qspi->cmd_completion); - cr = readl_relaxed(qspi->io_base + QUADSPI_CR); - writel_relaxed(cr | CR_TCIE, qspi->io_base + QUADSPI_CR); - - if (!wait_for_completion_interruptible_timeout(&qspi->cmd_completion, - msecs_to_jiffies(1000))) - err = -ETIMEDOUT; - - writel_relaxed(cr, qspi->io_base + QUADSPI_CR); - return err; -} - -static int stm32_qspi_wait_nobusy(struct stm32_qspi *qspi) -{ - u32 sr; - - return readl_relaxed_poll_timeout(qspi->io_base + QUADSPI_SR, sr, - !(sr & SR_BUSY), 10, - STM32_QSPI_BUSY_TIMEOUT_US); -} - -static void stm32_qspi_set_framemode(struct spi_nor *nor, - struct stm32_qspi_cmd *cmd, bool read) -{ - u32 dmode = CCR_DMODE_1; - - cmd->framemode = CCR_IMODE_1; - - if (read) { - switch (nor->read_proto) { - default: - case SNOR_PROTO_1_1_1: - dmode = CCR_DMODE_1; - break; - case SNOR_PROTO_1_1_2: - dmode = CCR_DMODE_2; - break; - case SNOR_PROTO_1_1_4: - dmode = CCR_DMODE_4; - break; - } - } - - cmd->framemode |= cmd->tx_data ? dmode : 0; - cmd->framemode |= cmd->addr_width ? CCR_ADMODE_1 : 0; -} - -static void stm32_qspi_read_fifo(u8 *val, void __iomem *addr) -{ - *val = readb_relaxed(addr); -} - -static void stm32_qspi_write_fifo(u8 *val, void __iomem *addr) -{ - writeb_relaxed(*val, addr); -} - -static int stm32_qspi_tx_poll(struct stm32_qspi *qspi, - const struct stm32_qspi_cmd *cmd) -{ - void (*tx_fifo)(u8 *, void __iomem *); - u32 len = cmd->len, sr; - u8 *buf = cmd->buf; - int ret; - - if (cmd->qspimode == CCR_FMODE_INDW) - tx_fifo = stm32_qspi_write_fifo; - else - tx_fifo = stm32_qspi_read_fifo; - - while (len--) { - ret = readl_relaxed_poll_timeout(qspi->io_base + QUADSPI_SR, - sr, (sr & SR_FTF), 10, - STM32_QSPI_FIFO_TIMEOUT_US); - if (ret) { - dev_err(qspi->dev, "fifo timeout (stat:%#x)\n", sr); - return ret; - } - tx_fifo(buf++, qspi->io_base + QUADSPI_DR); - } - - return 0; -} - -static int stm32_qspi_tx_mm(struct stm32_qspi *qspi, - const struct stm32_qspi_cmd *cmd) -{ - memcpy_fromio(cmd->buf, qspi->mm_base + cmd->addr, cmd->len); - return 0; -} - -static int stm32_qspi_tx(struct stm32_qspi *qspi, - const struct stm32_qspi_cmd *cmd) -{ - if (!cmd->tx_data) - return 0; - - if (cmd->qspimode == CCR_FMODE_MM) - return stm32_qspi_tx_mm(qspi, cmd); - - return stm32_qspi_tx_poll(qspi, cmd); -} - -static int stm32_qspi_send(struct stm32_qspi_flash *flash, - const struct stm32_qspi_cmd *cmd) -{ - struct stm32_qspi *qspi = flash->qspi; - u32 ccr, dcr, cr; - u32 last_byte; - int err; - - err = stm32_qspi_wait_nobusy(qspi); - if (err) - goto abort; - - dcr = readl_relaxed(qspi->io_base + QUADSPI_DCR) & ~DCR_FSIZE_MASK; - dcr |= DCR_FSIZE(flash->fsize); - writel_relaxed(dcr, qspi->io_base + QUADSPI_DCR); - - cr = readl_relaxed(qspi->io_base + QUADSPI_CR); - cr &= ~CR_PRESC_MASK & ~CR_FSEL; - cr |= CR_PRESC(flash->presc); - cr |= flash->cs ? CR_FSEL : 0; - writel_relaxed(cr, qspi->io_base + QUADSPI_CR); - - if (cmd->tx_data) - writel_relaxed(cmd->len - 1, qspi->io_base + QUADSPI_DLR); - - ccr = cmd->framemode | cmd->qspimode; - - if (cmd->dummy) - ccr |= CCR_DCYC(cmd->dummy); - - if (cmd->addr_width) - ccr |= CCR_ADSIZE(cmd->addr_width - 1); - - ccr |= CCR_INST(cmd->opcode); - writel_relaxed(ccr, qspi->io_base + QUADSPI_CCR); - - if (cmd->addr_width && cmd->qspimode != CCR_FMODE_MM) - writel_relaxed(cmd->addr, qspi->io_base + QUADSPI_AR); - - err = stm32_qspi_tx(qspi, cmd); - if (err) - goto abort; - - if (cmd->qspimode != CCR_FMODE_MM) { - err = stm32_qspi_wait_cmd(qspi); - if (err) - goto abort; - writel_relaxed(FCR_CTCF, qspi->io_base + QUADSPI_FCR); - } else { - last_byte = cmd->addr + cmd->len; - if (last_byte > flash->prefetch_limit) - goto abort; - } - - return err; - -abort: - cr = readl_relaxed(qspi->io_base + QUADSPI_CR) | CR_ABORT; - writel_relaxed(cr, qspi->io_base + QUADSPI_CR); - - if (err) - dev_err(qspi->dev, "%s abort err:%d\n", __func__, err); - - return err; -} - -static int stm32_qspi_read_reg(struct spi_nor *nor, - u8 opcode, u8 *buf, int len) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct device *dev = flash->qspi->dev; - struct stm32_qspi_cmd cmd; - - dev_dbg(dev, "read_reg: cmd:%#.2x buf:%pK len:%#x\n", opcode, buf, len); - - memset(&cmd, 0, sizeof(cmd)); - cmd.opcode = opcode; - cmd.tx_data = true; - cmd.len = len; - cmd.buf = buf; - cmd.qspimode = CCR_FMODE_INDR; - - stm32_qspi_set_framemode(nor, &cmd, false); - - return stm32_qspi_send(flash, &cmd); -} - -static int stm32_qspi_write_reg(struct spi_nor *nor, u8 opcode, - u8 *buf, int len) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct device *dev = flash->qspi->dev; - struct stm32_qspi_cmd cmd; - - dev_dbg(dev, "write_reg: cmd:%#.2x buf:%pK len:%#x\n", opcode, buf, len); - - memset(&cmd, 0, sizeof(cmd)); - cmd.opcode = opcode; - cmd.tx_data = !!(buf && len > 0); - cmd.len = len; - cmd.buf = buf; - cmd.qspimode = CCR_FMODE_INDW; - - stm32_qspi_set_framemode(nor, &cmd, false); - - return stm32_qspi_send(flash, &cmd); -} - -static ssize_t stm32_qspi_read(struct spi_nor *nor, loff_t from, size_t len, - u_char *buf) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct stm32_qspi *qspi = flash->qspi; - struct stm32_qspi_cmd cmd; - int err; - - dev_dbg(qspi->dev, "read(%#.2x): buf:%pK from:%#.8x len:%#zx\n", - nor->read_opcode, buf, (u32)from, len); - - memset(&cmd, 0, sizeof(cmd)); - cmd.opcode = nor->read_opcode; - cmd.addr_width = nor->addr_width; - cmd.addr = (u32)from; - cmd.tx_data = true; - cmd.dummy = nor->read_dummy; - cmd.len = len; - cmd.buf = buf; - cmd.qspimode = flash->read_mode; - - stm32_qspi_set_framemode(nor, &cmd, true); - err = stm32_qspi_send(flash, &cmd); - - return err ? err : len; -} - -static ssize_t stm32_qspi_write(struct spi_nor *nor, loff_t to, size_t len, - const u_char *buf) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct device *dev = flash->qspi->dev; - struct stm32_qspi_cmd cmd; - int err; - - dev_dbg(dev, "write(%#.2x): buf:%p to:%#.8x len:%#zx\n", - nor->program_opcode, buf, (u32)to, len); - - memset(&cmd, 0, sizeof(cmd)); - cmd.opcode = nor->program_opcode; - cmd.addr_width = nor->addr_width; - cmd.addr = (u32)to; - cmd.tx_data = true; - cmd.len = len; - cmd.buf = (void *)buf; - cmd.qspimode = CCR_FMODE_INDW; - - stm32_qspi_set_framemode(nor, &cmd, false); - err = stm32_qspi_send(flash, &cmd); - - return err ? err : len; -} - -static int stm32_qspi_erase(struct spi_nor *nor, loff_t offs) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct device *dev = flash->qspi->dev; - struct stm32_qspi_cmd cmd; - - dev_dbg(dev, "erase(%#.2x):offs:%#x\n", nor->erase_opcode, (u32)offs); - - memset(&cmd, 0, sizeof(cmd)); - cmd.opcode = nor->erase_opcode; - cmd.addr_width = nor->addr_width; - cmd.addr = (u32)offs; - cmd.qspimode = CCR_FMODE_INDW; - - stm32_qspi_set_framemode(nor, &cmd, false); - - return stm32_qspi_send(flash, &cmd); -} - -static irqreturn_t stm32_qspi_irq(int irq, void *dev_id) -{ - struct stm32_qspi *qspi = (struct stm32_qspi *)dev_id; - u32 cr, sr, fcr = 0; - - cr = readl_relaxed(qspi->io_base + QUADSPI_CR); - sr = readl_relaxed(qspi->io_base + QUADSPI_SR); - - if ((cr & CR_TCIE) && (sr & SR_TCF)) { - /* tx complete */ - fcr |= FCR_CTCF; - complete(&qspi->cmd_completion); - } else { - dev_info_ratelimited(qspi->dev, "spurious interrupt\n"); - } - - writel_relaxed(fcr, qspi->io_base + QUADSPI_FCR); - - return IRQ_HANDLED; -} - -static int stm32_qspi_prep(struct spi_nor *nor, enum spi_nor_ops ops) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct stm32_qspi *qspi = flash->qspi; - - mutex_lock(&qspi->lock); - return 0; -} - -static void stm32_qspi_unprep(struct spi_nor *nor, enum spi_nor_ops ops) -{ - struct stm32_qspi_flash *flash = nor->priv; - struct stm32_qspi *qspi = flash->qspi; - - mutex_unlock(&qspi->lock); -} - -static int stm32_qspi_flash_setup(struct stm32_qspi *qspi, - struct device_node *np) -{ - struct spi_nor_hwcaps hwcaps = { - .mask = SNOR_HWCAPS_READ | - SNOR_HWCAPS_READ_FAST | - SNOR_HWCAPS_PP, - }; - u32 width, presc, cs_num, max_rate = 0; - struct stm32_qspi_flash *flash; - struct mtd_info *mtd; - int ret; - - of_property_read_u32(np, "reg", &cs_num); - if (cs_num >= STM32_MAX_NORCHIP) - return -EINVAL; - - of_property_read_u32(np, "spi-max-frequency", &max_rate); - if (!max_rate) - return -EINVAL; - - presc = DIV_ROUND_UP(qspi->clk_rate, max_rate) - 1; - - if (of_property_read_u32(np, "spi-rx-bus-width", &width)) - width = 1; - - if (width == 4) - hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4; - else if (width == 2) - hwcaps.mask |= SNOR_HWCAPS_READ_1_1_2; - else if (width != 1) - return -EINVAL; - - flash = &qspi->flash[cs_num]; - flash->qspi = qspi; - flash->cs = cs_num; - flash->presc = presc; - - flash->nor.dev = qspi->dev; - spi_nor_set_flash_node(&flash->nor, np); - flash->nor.priv = flash; - mtd = &flash->nor.mtd; - - flash->nor.read = stm32_qspi_read; - flash->nor.write = stm32_qspi_write; - flash->nor.erase = stm32_qspi_erase; - flash->nor.read_reg = stm32_qspi_read_reg; - flash->nor.write_reg = stm32_qspi_write_reg; - flash->nor.prepare = stm32_qspi_prep; - flash->nor.unprepare = stm32_qspi_unprep; - - writel_relaxed(LPTR_DFT_TIMEOUT, qspi->io_base + QUADSPI_LPTR); - - writel_relaxed(CR_PRESC(presc) | CR_FTHRES(3) | CR_TCEN | CR_SSHIFT - | CR_EN, qspi->io_base + QUADSPI_CR); - - /* - * in stm32 qspi controller, QUADSPI_DCR register has a fsize field - * which define the size of nor flash. - * if fsize is NULL, the controller can't sent spi-nor command. - * set a temporary value just to discover the nor flash with - * "spi_nor_scan". After, the right value (mtd->size) can be set. - */ - flash->fsize = FSIZE_VAL(SZ_1K); - - ret = spi_nor_scan(&flash->nor, NULL, &hwcaps); - if (ret) { - dev_err(qspi->dev, "device scan failed\n"); - return ret; - } - - flash->fsize = FSIZE_VAL(mtd->size); - flash->prefetch_limit = mtd->size - STM32_QSPI_FIFO_SZ; - - flash->read_mode = CCR_FMODE_MM; - if (mtd->size > qspi->mm_size) - flash->read_mode = CCR_FMODE_INDR; - - writel_relaxed(DCR_CSHT(1), qspi->io_base + QUADSPI_DCR); - - ret = mtd_device_register(mtd, NULL, 0); - if (ret) { - dev_err(qspi->dev, "mtd device parse failed\n"); - return ret; - } - - flash->registered = true; - - dev_dbg(qspi->dev, "read mm:%s cs:%d bus:%d\n", - flash->read_mode == CCR_FMODE_MM ? "yes" : "no", cs_num, width); - - return 0; -} - -static void stm32_qspi_mtd_free(struct stm32_qspi *qspi) -{ - int i; - - for (i = 0; i < STM32_MAX_NORCHIP; i++) - if (qspi->flash[i].registered) - mtd_device_unregister(&qspi->flash[i].nor.mtd); -} - -static int stm32_qspi_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct device_node *flash_np; - struct reset_control *rstc; - struct stm32_qspi *qspi; - struct resource *res; - int ret, irq; - - qspi = devm_kzalloc(dev, sizeof(*qspi), GFP_KERNEL); - if (!qspi) - return -ENOMEM; - - qspi->nor_num = of_get_child_count(dev->of_node); - if (!qspi->nor_num || qspi->nor_num > STM32_MAX_NORCHIP) - return -ENODEV; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi"); - qspi->io_base = devm_ioremap_resource(dev, res); - if (IS_ERR(qspi->io_base)) - return PTR_ERR(qspi->io_base); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi_mm"); - qspi->mm_base = devm_ioremap_resource(dev, res); - if (IS_ERR(qspi->mm_base)) - return PTR_ERR(qspi->mm_base); - - qspi->mm_size = resource_size(res); - - irq = platform_get_irq(pdev, 0); - ret = devm_request_irq(dev, irq, stm32_qspi_irq, 0, - dev_name(dev), qspi); - if (ret) { - dev_err(dev, "failed to request irq\n"); - return ret; - } - - init_completion(&qspi->cmd_completion); - - qspi->clk = devm_clk_get(dev, NULL); - if (IS_ERR(qspi->clk)) - return PTR_ERR(qspi->clk); - - qspi->clk_rate = clk_get_rate(qspi->clk); - if (!qspi->clk_rate) - return -EINVAL; - - ret = clk_prepare_enable(qspi->clk); - if (ret) { - dev_err(dev, "can not enable the clock\n"); - return ret; - } - - rstc = devm_reset_control_get_exclusive(dev, NULL); - if (!IS_ERR(rstc)) { - reset_control_assert(rstc); - udelay(2); - reset_control_deassert(rstc); - } - - qspi->dev = dev; - platform_set_drvdata(pdev, qspi); - mutex_init(&qspi->lock); - - for_each_available_child_of_node(dev->of_node, flash_np) { - ret = stm32_qspi_flash_setup(qspi, flash_np); - if (ret) { - dev_err(dev, "unable to setup flash chip\n"); - goto err_flash; - } - } - - return 0; - -err_flash: - mutex_destroy(&qspi->lock); - stm32_qspi_mtd_free(qspi); - - clk_disable_unprepare(qspi->clk); - return ret; -} - -static int stm32_qspi_remove(struct platform_device *pdev) -{ - struct stm32_qspi *qspi = platform_get_drvdata(pdev); - - /* disable qspi */ - writel_relaxed(0, qspi->io_base + QUADSPI_CR); - - stm32_qspi_mtd_free(qspi); - mutex_destroy(&qspi->lock); - - clk_disable_unprepare(qspi->clk); - return 0; -} - -static const struct of_device_id stm32_qspi_match[] = { - {.compatible = "st,stm32f469-qspi"}, - {} -}; -MODULE_DEVICE_TABLE(of, stm32_qspi_match); - -static struct platform_driver stm32_qspi_driver = { - .probe = stm32_qspi_probe, - .remove = stm32_qspi_remove, - .driver = { - .name = "stm32-quadspi", - .of_match_table = stm32_qspi_match, - }, -}; -module_platform_driver(stm32_qspi_driver); - -MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>"); -MODULE_DESCRIPTION("STMicroelectronics STM32 quad spi driver"); -MODULE_LICENSE("GPL v2"); |