diff options
Diffstat (limited to 'drivers/mtd/nand/raw/ams-delta.c')
| -rw-r--r-- | drivers/mtd/nand/raw/ams-delta.c | 122 |
1 files changed, 66 insertions, 56 deletions
diff --git a/drivers/mtd/nand/raw/ams-delta.c b/drivers/mtd/nand/raw/ams-delta.c index efe12066dfbc..eb2aeadc3b65 100644 --- a/drivers/mtd/nand/raw/ams-delta.c +++ b/drivers/mtd/nand/raw/ams-delta.c @@ -34,14 +34,18 @@ /* * MTD structure for E3 (Delta) */ -static struct mtd_info *ams_delta_mtd = NULL; -static struct gpio_desc *gpiod_rdy; -static struct gpio_desc *gpiod_nce; -static struct gpio_desc *gpiod_nre; -static struct gpio_desc *gpiod_nwp; -static struct gpio_desc *gpiod_nwe; -static struct gpio_desc *gpiod_ale; -static struct gpio_desc *gpiod_cle; + +struct ams_delta_nand { + struct nand_chip nand_chip; + struct gpio_desc *gpiod_rdy; + struct gpio_desc *gpiod_nce; + struct gpio_desc *gpiod_nre; + struct gpio_desc *gpiod_nwp; + struct gpio_desc *gpiod_nwe; + struct gpio_desc *gpiod_ale; + struct gpio_desc *gpiod_cle; + void __iomem *io_base; +}; /* * Define partitions for flash devices @@ -70,25 +74,27 @@ static const struct mtd_partition partition_info[] = { static void ams_delta_write_byte(struct nand_chip *this, u_char byte) { - void __iomem *io_base = (void __iomem *)nand_get_controller_data(this); + struct ams_delta_nand *priv = nand_get_controller_data(this); + void __iomem *io_base = priv->io_base; writew(0, io_base + OMAP_MPUIO_IO_CNTL); writew(byte, this->legacy.IO_ADDR_W); - gpiod_set_value(gpiod_nwe, 0); + gpiod_set_value(priv->gpiod_nwe, 0); ndelay(40); - gpiod_set_value(gpiod_nwe, 1); + gpiod_set_value(priv->gpiod_nwe, 1); } static u_char ams_delta_read_byte(struct nand_chip *this) { u_char res; - void __iomem *io_base = (void __iomem *)nand_get_controller_data(this); + struct ams_delta_nand *priv = nand_get_controller_data(this); + void __iomem *io_base = priv->io_base; - gpiod_set_value(gpiod_nre, 0); + gpiod_set_value(priv->gpiod_nre, 0); ndelay(40); writew(~0, io_base + OMAP_MPUIO_IO_CNTL); res = readw(this->legacy.IO_ADDR_R); - gpiod_set_value(gpiod_nre, 1); + gpiod_set_value(priv->gpiod_nre, 1); return res; } @@ -121,11 +127,12 @@ static void ams_delta_read_buf(struct nand_chip *this, u_char *buf, int len) static void ams_delta_hwcontrol(struct nand_chip *this, int cmd, unsigned int ctrl) { + struct ams_delta_nand *priv = nand_get_controller_data(this); if (ctrl & NAND_CTRL_CHANGE) { - gpiod_set_value(gpiod_nce, !(ctrl & NAND_NCE)); - gpiod_set_value(gpiod_cle, !!(ctrl & NAND_CLE)); - gpiod_set_value(gpiod_ale, !!(ctrl & NAND_ALE)); + gpiod_set_value(priv->gpiod_nce, !(ctrl & NAND_NCE)); + gpiod_set_value(priv->gpiod_cle, !!(ctrl & NAND_CLE)); + gpiod_set_value(priv->gpiod_ale, !!(ctrl & NAND_ALE)); } if (cmd != NAND_CMD_NONE) @@ -134,7 +141,9 @@ static void ams_delta_hwcontrol(struct nand_chip *this, int cmd, static int ams_delta_nand_ready(struct nand_chip *this) { - return gpiod_get_value(gpiod_rdy); + struct ams_delta_nand *priv = nand_get_controller_data(this); + + return gpiod_get_value(priv->gpiod_rdy); } @@ -143,7 +152,9 @@ static int ams_delta_nand_ready(struct nand_chip *this) */ static int ams_delta_init(struct platform_device *pdev) { + struct ams_delta_nand *priv; struct nand_chip *this; + struct mtd_info *mtd; struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); void __iomem *io_base; int err = 0; @@ -152,15 +163,16 @@ static int ams_delta_init(struct platform_device *pdev) return -ENXIO; /* Allocate memory for MTD device structure and private data */ - this = kzalloc(sizeof(struct nand_chip), GFP_KERNEL); - if (!this) { + priv = devm_kzalloc(&pdev->dev, sizeof(struct ams_delta_nand), + GFP_KERNEL); + if (!priv) { pr_warn("Unable to allocate E3 NAND MTD device structure.\n"); - err = -ENOMEM; - goto out; + return -ENOMEM; } + this = &priv->nand_chip; - ams_delta_mtd = nand_to_mtd(this); - ams_delta_mtd->dev.parent = &pdev->dev; + mtd = nand_to_mtd(this); + mtd->dev.parent = &pdev->dev; /* * Don't try to request the memory region from here, @@ -175,7 +187,8 @@ static int ams_delta_init(struct platform_device *pdev) goto out_free; } - nand_set_controller_data(this, (void *)io_base); + priv->io_base = io_base; + nand_set_controller_data(this, priv); /* Set address of NAND IO lines */ this->legacy.IO_ADDR_R = io_base + OMAP_MPUIO_INPUT_LATCH; @@ -185,14 +198,14 @@ static int ams_delta_init(struct platform_device *pdev) this->legacy.read_buf = ams_delta_read_buf; this->legacy.cmd_ctrl = ams_delta_hwcontrol; - gpiod_rdy = devm_gpiod_get_optional(&pdev->dev, "rdy", GPIOD_IN); - if (IS_ERR(gpiod_rdy)) { - err = PTR_ERR(gpiod_rdy); + priv->gpiod_rdy = devm_gpiod_get_optional(&pdev->dev, "rdy", GPIOD_IN); + if (IS_ERR(priv->gpiod_rdy)) { + err = PTR_ERR(priv->gpiod_rdy); dev_warn(&pdev->dev, "RDY GPIO request failed (%d)\n", err); goto out_mtd; } - if (gpiod_rdy) + if (priv->gpiod_rdy) this->legacy.dev_ready = ams_delta_nand_ready; /* 25 us command delay time */ @@ -200,47 +213,47 @@ static int ams_delta_init(struct platform_device *pdev) this->ecc.mode = NAND_ECC_SOFT; this->ecc.algo = NAND_ECC_HAMMING; - platform_set_drvdata(pdev, io_base); + platform_set_drvdata(pdev, priv); /* Set chip enabled, but */ - gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH); - if (IS_ERR(gpiod_nwp)) { - err = PTR_ERR(gpiod_nwp); + priv->gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH); + if (IS_ERR(priv->gpiod_nwp)) { + err = PTR_ERR(priv->gpiod_nwp); dev_err(&pdev->dev, "NWP GPIO request failed (%d)\n", err); goto out_mtd; } - gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_HIGH); - if (IS_ERR(gpiod_nce)) { - err = PTR_ERR(gpiod_nce); + priv->gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_HIGH); + if (IS_ERR(priv->gpiod_nce)) { + err = PTR_ERR(priv->gpiod_nce); dev_err(&pdev->dev, "NCE GPIO request failed (%d)\n", err); goto out_mtd; } - gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_HIGH); - if (IS_ERR(gpiod_nre)) { - err = PTR_ERR(gpiod_nre); + priv->gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_HIGH); + if (IS_ERR(priv->gpiod_nre)) { + err = PTR_ERR(priv->gpiod_nre); dev_err(&pdev->dev, "NRE GPIO request failed (%d)\n", err); goto out_mtd; } - gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_HIGH); - if (IS_ERR(gpiod_nwe)) { - err = PTR_ERR(gpiod_nwe); + priv->gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_HIGH); + if (IS_ERR(priv->gpiod_nwe)) { + err = PTR_ERR(priv->gpiod_nwe); dev_err(&pdev->dev, "NWE GPIO request failed (%d)\n", err); goto out_mtd; } - gpiod_ale = devm_gpiod_get(&pdev->dev, "ale", GPIOD_OUT_LOW); - if (IS_ERR(gpiod_ale)) { - err = PTR_ERR(gpiod_ale); + priv->gpiod_ale = devm_gpiod_get(&pdev->dev, "ale", GPIOD_OUT_LOW); + if (IS_ERR(priv->gpiod_ale)) { + err = PTR_ERR(priv->gpiod_ale); dev_err(&pdev->dev, "ALE GPIO request failed (%d)\n", err); goto out_mtd; } - gpiod_cle = devm_gpiod_get(&pdev->dev, "cle", GPIOD_OUT_LOW); - if (IS_ERR(gpiod_cle)) { - err = PTR_ERR(gpiod_cle); + priv->gpiod_cle = devm_gpiod_get(&pdev->dev, "cle", GPIOD_OUT_LOW); + if (IS_ERR(priv->gpiod_cle)) { + err = PTR_ERR(priv->gpiod_cle); dev_err(&pdev->dev, "CLE GPIO request failed (%d)\n", err); goto out_mtd; } @@ -251,15 +264,13 @@ static int ams_delta_init(struct platform_device *pdev) goto out_mtd; /* Register the partitions */ - mtd_device_register(ams_delta_mtd, partition_info, - ARRAY_SIZE(partition_info)); + mtd_device_register(mtd, partition_info, ARRAY_SIZE(partition_info)); goto out; out_mtd: iounmap(io_base); out_free: - kfree(this); out: return err; } @@ -269,16 +280,15 @@ out_free: */ static int ams_delta_cleanup(struct platform_device *pdev) { - void __iomem *io_base = platform_get_drvdata(pdev); + struct ams_delta_nand *priv = platform_get_drvdata(pdev); + struct mtd_info *mtd = nand_to_mtd(&priv->nand_chip); + void __iomem *io_base = priv->io_base; /* Release resources, unregister device */ - nand_release(mtd_to_nand(ams_delta_mtd)); + nand_release(mtd_to_nand(mtd)); iounmap(io_base); - /* Free the MTD device structure */ - kfree(mtd_to_nand(ams_delta_mtd)); - return 0; } |