mtd: rawnand: cs553x: Stop using chip->legacy.IO_ADDR_{R, W}

Now that we have our own controller struct we can keep the MMIO pointer
in there and use instead of using the chip->legacy.IO_ADDR_{R,W} fields.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200501090650.1138200-3-boris.brezillon@collabora.com

diff --git a/drivers/mtd/nand/raw/cs553x_nand.c b/drivers/mtd/nand/raw/cs553x_nand.c
index 970de72..84cf87f 100644 (file)
--- a/drivers/mtd/nand/raw/cs553x_nand.c
+++ b/drivers/mtd/nand/raw/cs553x_nand.c
@@ -92,51 +92,66 @@
 struct cs553x_nand_controller {
        struct nand_controller base;
        struct nand_chip chip;
+       void __iomem *mmio;
 };
 
+static struct cs553x_nand_controller *
+to_cs553x(struct nand_controller *controller)
+{
+       return container_of(controller, struct cs553x_nand_controller, base);
+}
+
 static void cs553x_read_buf(struct nand_chip *this, u_char *buf, int len)
 {
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
+
        while (unlikely(len > 0x800)) {
-               memcpy_fromio(buf, this->legacy.IO_ADDR_R, 0x800);
+               memcpy_fromio(buf, cs553x->mmio, 0x800);
                buf += 0x800;
                len -= 0x800;
        }
-       memcpy_fromio(buf, this->legacy.IO_ADDR_R, len);
+       memcpy_fromio(buf, cs553x->mmio, len);
 }
 
 static void cs553x_write_buf(struct nand_chip *this, const u_char *buf, int len)
 {
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
+
        while (unlikely(len > 0x800)) {
-               memcpy_toio(this->legacy.IO_ADDR_R, buf, 0x800);
+               memcpy_toio(cs553x->mmio, buf, 0x800);
                buf += 0x800;
                len -= 0x800;
        }
-       memcpy_toio(this->legacy.IO_ADDR_R, buf, len);
+       memcpy_toio(cs553x->mmio, buf, len);
 }
 
 static unsigned char cs553x_read_byte(struct nand_chip *this)
 {
-       return readb(this->legacy.IO_ADDR_R);
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
+
+       return readb(cs553x->mmio);
 }
 
 static void cs553x_write_byte(struct nand_chip *this, u_char byte)
 {
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
        int i = 100000;
 
-       while (i && readb(this->legacy.IO_ADDR_R + MM_NAND_STS) & CS_NAND_CTLR_BUSY) {
+       while (i && readb(cs553x->mmio + MM_NAND_STS) & CS_NAND_CTLR_BUSY) {
                udelay(1);
                i--;
        }
-       writeb(byte, this->legacy.IO_ADDR_W + 0x801);
+       writeb(byte, cs553x->mmio + 0x801);
 }
 
 static void cs553x_hwcontrol(struct nand_chip *this, int cmd,
                             unsigned int ctrl)
 {
-       void __iomem *mmio_base = this->legacy.IO_ADDR_R;
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
+
        if (ctrl & NAND_CTRL_CHANGE) {
                unsigned char ctl = (ctrl & ~NAND_CTRL_CHANGE ) ^ 0x01;
-               writeb(ctl, mmio_base + MM_NAND_CTL);
+               writeb(ctl, cs553x->mmio + MM_NAND_CTL);
        }
        if (cmd != NAND_CMD_NONE)
                cs553x_write_byte(this, cmd);
@@ -144,26 +159,26 @@ static void cs553x_hwcontrol(struct nand_chip *this, int cmd,
 
 static int cs553x_device_ready(struct nand_chip *this)
 {
-       void __iomem *mmio_base = this->legacy.IO_ADDR_R;
-       unsigned char foo = readb(mmio_base + MM_NAND_STS);
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
+       unsigned char foo = readb(cs553x->mmio + MM_NAND_STS);
 
        return (foo & CS_NAND_STS_FLASH_RDY) && !(foo & CS_NAND_CTLR_BUSY);
 }
 
 static void cs_enable_hwecc(struct nand_chip *this, int mode)
 {
-       void __iomem *mmio_base = this->legacy.IO_ADDR_R;
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
 
-       writeb(0x07, mmio_base + MM_NAND_ECC_CTL);
+       writeb(0x07, cs553x->mmio + MM_NAND_ECC_CTL);
 }
 
 static int cs_calculate_ecc(struct nand_chip *this, const u_char *dat,
                            u_char *ecc_code)
 {
+       struct cs553x_nand_controller *cs553x = to_cs553x(this->controller);
        uint32_t ecc;
-       void __iomem *mmio_base = this->legacy.IO_ADDR_R;
 
-       ecc = readl(mmio_base + MM_NAND_STS);
+       ecc = readl(cs553x->mmio + MM_NAND_STS);
 
        ecc_code[1] = ecc >> 8;
        ecc_code[0] = ecc >> 16;
@@ -204,8 +219,8 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
        new_mtd->owner = THIS_MODULE;
 
        /* map physical address */
-       this->legacy.IO_ADDR_R = this->legacy.IO_ADDR_W = ioremap(adr, 4096);
-       if (!this->legacy.IO_ADDR_R) {
+       controller->mmio = ioremap(adr, 4096);
+       if (!controller->mmio) {
                pr_warn("ioremap cs553x NAND @0x%08lx failed\n", adr);
                err = -EIO;
                goto out_mtd;
@@ -247,7 +262,7 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
 out_free:
        kfree(new_mtd->name);
 out_ior:
-       iounmap(this->legacy.IO_ADDR_R);
+       iounmap(controller->mmio);
 out_mtd:
        kfree(controller);
 out:
@@ -322,7 +337,6 @@ static void __exit cs553x_cleanup(void)
        int i;
 
        for (i = 0; i < NR_CS553X_CONTROLLERS; i++) {
-               void __iomem *mmio_base;
                struct cs553x_nand_controller *controller = controllers[i];
                struct nand_chip *this = &controller->chip;
                struct mtd_info *mtd = nand_to_mtd(this);
@@ -330,16 +344,13 @@ static void __exit cs553x_cleanup(void)
                if (!mtd)
                        continue;
 
-               this = mtd_to_nand(mtd);
-               mmio_base = this->legacy.IO_ADDR_R;
-
                /* Release resources, unregister device */
                nand_release(this);
                kfree(mtd->name);
                controllers[i] = NULL;
 
                /* unmap physical address */
-               iounmap(mmio_base);
+               iounmap(controller->mmio);
 
                /* Free the MTD device structure */
                kfree(controller);