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author | Brian Norris <computersforpeace@gmail.com> | 2016-02-26 10:50:28 (GMT) |
---|---|---|
committer | Brian Norris <computersforpeace@gmail.com> | 2016-04-04 07:07:57 (GMT) |
commit | 5651d6aaf489d1db48c253cf884b40214e91c2c5 (patch) | |
tree | da4bc73c1d32f47829974ab4fce280d99f6e28bb /drivers/mtd/devices | |
parent | fddcca5107051adf9e4481d2a79ae0616577fd2c (diff) | |
download | linux-5651d6aaf489d1db48c253cf884b40214e91c2c5.tar.xz |
mtd: bcm47xxsflash: use ioremap_cache() instead of KSEG0ADDR()
Using KSEG0ADDR makes code highly MIPS dependent and not portable.
Thanks to the fix a68f376 ("MIPS: io.h: Define `ioremap_cache'") we can
use ioremap_cache which is generic and supported on MIPS as well now.
KSEG0ADDR was translating 0x1c000000 into 0x9c000000. With ioremap_cache
we use MIPS's __ioremap (and then remap_area_pages). This results in
different address (e.g. 0xc0080000) but it still should be cached as
expected and it was successfully tested with BCM47186B0.
Other than that drivers/bcma/driver_chipcommon_sflash.c nicely setups a
struct resource for access window, but we wren't using it. Use it now
and drop duplicated info.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Diffstat (limited to 'drivers/mtd/devices')
-rw-r--r-- | drivers/mtd/devices/bcm47xxsflash.c | 29 | ||||
-rw-r--r-- | drivers/mtd/devices/bcm47xxsflash.h | 3 |
2 files changed, 26 insertions, 6 deletions
diff --git a/drivers/mtd/devices/bcm47xxsflash.c b/drivers/mtd/devices/bcm47xxsflash.c index 347bb83..1c65c15 100644 --- a/drivers/mtd/devices/bcm47xxsflash.c +++ b/drivers/mtd/devices/bcm47xxsflash.c @@ -2,6 +2,7 @@ #include <linux/module.h> #include <linux/slab.h> #include <linux/delay.h> +#include <linux/ioport.h> #include <linux/mtd/mtd.h> #include <linux/platform_device.h> #include <linux/bcma/bcma.h> @@ -109,8 +110,7 @@ static int bcm47xxsflash_read(struct mtd_info *mtd, loff_t from, size_t len, if ((from + len) > mtd->size) return -EINVAL; - memcpy_fromio(buf, (void __iomem *)KSEG0ADDR(b47s->window + from), - len); + memcpy_fromio(buf, b47s->window + from, len); *retlen = len; return len; @@ -275,15 +275,33 @@ static void bcm47xxsflash_bcma_cc_write(struct bcm47xxsflash *b47s, u16 offset, static int bcm47xxsflash_bcma_probe(struct platform_device *pdev) { - struct bcma_sflash *sflash = dev_get_platdata(&pdev->dev); + struct device *dev = &pdev->dev; + struct bcma_sflash *sflash = dev_get_platdata(dev); struct bcm47xxsflash *b47s; + struct resource *res; int err; - b47s = devm_kzalloc(&pdev->dev, sizeof(*b47s), GFP_KERNEL); + b47s = devm_kzalloc(dev, sizeof(*b47s), GFP_KERNEL); if (!b47s) return -ENOMEM; sflash->priv = b47s; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "invalid resource\n"); + return -EINVAL; + } + if (!devm_request_mem_region(dev, res->start, resource_size(res), + res->name)) { + dev_err(dev, "can't request region for resource %pR\n", res); + return -EBUSY; + } + b47s->window = ioremap_cache(res->start, resource_size(res)); + if (!b47s->window) { + dev_err(dev, "ioremap failed for resource %pR\n", res); + return -ENOMEM; + } + b47s->bcma_cc = container_of(sflash, struct bcma_drv_cc, sflash); b47s->cc_read = bcm47xxsflash_bcma_cc_read; b47s->cc_write = bcm47xxsflash_bcma_cc_write; @@ -297,7 +315,6 @@ static int bcm47xxsflash_bcma_probe(struct platform_device *pdev) break; } - b47s->window = sflash->window; b47s->blocksize = sflash->blocksize; b47s->numblocks = sflash->numblocks; b47s->size = sflash->size; @@ -306,6 +323,7 @@ static int bcm47xxsflash_bcma_probe(struct platform_device *pdev) err = mtd_device_parse_register(&b47s->mtd, probes, NULL, NULL, 0); if (err) { pr_err("Failed to register MTD device: %d\n", err); + iounmap(b47s->window); return err; } @@ -321,6 +339,7 @@ static int bcm47xxsflash_bcma_remove(struct platform_device *pdev) struct bcm47xxsflash *b47s = sflash->priv; mtd_device_unregister(&b47s->mtd); + iounmap(b47s->window); return 0; } diff --git a/drivers/mtd/devices/bcm47xxsflash.h b/drivers/mtd/devices/bcm47xxsflash.h index fe93daf..1564b62 100644 --- a/drivers/mtd/devices/bcm47xxsflash.h +++ b/drivers/mtd/devices/bcm47xxsflash.h @@ -65,7 +65,8 @@ struct bcm47xxsflash { enum bcm47xxsflash_type type; - u32 window; + void __iomem *window; + u32 blocksize; u16 numblocks; u32 size; |