[PATCH 1/5] mtd: onenand/samsung: Unify resource order for controller variants

Paweł Chmiel
2019-04-26T16:42:40Z

From: Tomasz Figa <tomasz.figa@gmail.com>

Before this patch, the order of memory resources requested by the driver
was controller base as first and OneNAND chip base as second for
S3C64xx/S5PC100 variant and the opposite for S5PC110/S5PV210 variant.

To make this more consistent, this patch swaps the order of resources
for the latter and updates platform code accordingly. As a nice side
effect there is a slight reduction in line count of probe function.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
---
drivers/mtd/nand/onenand/samsung.c | 48 ++++++++++++++----------------
1 file changed, 22 insertions(+), 26 deletions(-)

diff --git a/drivers/mtd/nand/onenand/samsung.c b/drivers/mtd/nand/onenand/samsung.c
index e64d0fdf7eb5..a425f19a3876 100644
--- a/drivers/mtd/nand/onenand/samsung.c
+++ b/drivers/mtd/nand/onenand/samsung.c
@@ -126,14 +126,13 @@ struct s3c_onenand {
struct mtd_info *mtd;
struct platform_device *pdev;
enum soc_type type;
- void __iomem *base;
- void __iomem *ahb_addr;
+ void __iomem *ctrl_base;
+ void __iomem *chip_base;
int bootram_command;
void *page_buf;
void *oob_buf;
unsigned int (*mem_addr)(int fba, int fpa, int fsa);
unsigned int (*cmd_map)(unsigned int type, unsigned int val);
- void __iomem *dma_addr;
unsigned long phys_base;
struct completion complete;
};
@@ -147,22 +146,22 @@ static struct s3c_onenand *onenand;

static inline int s3c_read_reg(int offset)
{
- return readl(onenand->base + offset);
+ return readl(onenand->ctrl_base + offset);
}

static inline void s3c_write_reg(int value, int offset)
{
- writel(value, onenand->base + offset);
+ writel(value, onenand->ctrl_base + offset);
}

static inline int s3c_read_cmd(unsigned int cmd)
{
- return readl(onenand->ahb_addr + cmd);
+ return readl(onenand->chip_base + cmd);
}

static inline void s3c_write_cmd(int value, unsigned int cmd)
{
- writel(value, onenand->ahb_addr + cmd);
+ writel(value, onenand->chip_base + cmd);
}

#ifdef SAMSUNG_DEBUG
@@ -519,7 +518,7 @@ static int (*s5pc110_dma_ops)(dma_addr_t dst, dma_addr_t src, size_t count, int

static int s5pc110_dma_poll(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
{
- void __iomem *base = onenand->dma_addr;
+ void __iomem *base = onenand->ctrl_base;
int status;
unsigned long timeout;

@@ -563,7 +562,7 @@ static int s5pc110_dma_poll(dma_addr_t dst, dma_addr_t src, size_t count, int di

static irqreturn_t s5pc110_onenand_irq(int irq, void *data)
{
- void __iomem *base = onenand->dma_addr;
+ void __iomem *base = onenand->ctrl_base;
int status, cmd = 0;

status = readl(base + S5PC110_INTC_DMA_STATUS);
@@ -585,7 +584,7 @@ static irqreturn_t s5pc110_onenand_irq(int irq, void *data)

static int s5pc110_dma_irq(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
{
- void __iomem *base = onenand->dma_addr;
+ void __iomem *base = onenand->ctrl_base;
int status;

status = readl(base + S5PC110_INTC_DMA_MASK);
@@ -634,7 +633,7 @@ static int s5pc110_read_bufferram(struct mtd_info *mtd, int area,
}

if (offset & 3 || (size_t) buf & 3 ||
- !onenand->dma_addr || count != mtd->writesize)
+ !onenand->ctrl_base || count != mtd->writesize)
goto normal;

/* Handle vmalloc address */
@@ -864,23 +863,22 @@ static int s3c_onenand_probe(struct platform_device *pdev)
s3c_onenand_setup(mtd);

r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- onenand->base = devm_ioremap_resource(&pdev->dev, r);
- if (IS_ERR(onenand->base))
- return PTR_ERR(onenand->base);
-
+ onenand->ctrl_base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(onenand->ctrl_base))
+ return PTR_ERR(onenand->ctrl_base);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ onenand->chip_base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(onenand->chip_base))
+ return PTR_ERR(onenand->chip_base);
onenand->phys_base = r->start;

- /* Set onenand_chip also */
- this->base = onenand->base;
-
/* Use runtime badblock check */
this->options |= ONENAND_SKIP_UNLOCK_CHECK;

if (onenand->type != TYPE_S5PC110) {
- r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- onenand->ahb_addr = devm_ioremap_resource(&pdev->dev, r);
- if (IS_ERR(onenand->ahb_addr))
- return PTR_ERR(onenand->ahb_addr);
+ /* Set onenand_chip also */
+ this->base = onenand->ctrl_base;

/* Allocate 4KiB BufferRAM */
onenand->page_buf = devm_kzalloc(&pdev->dev, SZ_4K,
@@ -898,10 +896,8 @@ static int s3c_onenand_probe(struct platform_device *pdev)
this->subpagesize = mtd->writesize;

} else { /* S5PC110 */
- r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- onenand->dma_addr = devm_ioremap_resource(&pdev->dev, r);
- if (IS_ERR(onenand->dma_addr))
- return PTR_ERR(onenand->dma_addr);
+ /* Set onenand_chip also */
+ this->base = onenand->chip_base;

s5pc110_dma_ops = s5pc110_dma_poll;
/* Interrupt support */
--
2.20.1