60d2620253
This allows building bcm47xxsflash on ARM. Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
138 lines
4.2 KiB
Diff
138 lines
4.2 KiB
Diff
From 5651d6aaf489d1db48c253cf884b40214e91c2c5 Mon Sep 17 00:00:00 2001
|
|
From: Brian Norris <computersforpeace@gmail.com>
|
|
Date: Fri, 26 Feb 2016 11:50:28 +0100
|
|
Subject: [PATCH] mtd: bcm47xxsflash: use ioremap_cache() instead of
|
|
KSEG0ADDR()
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
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>
|
|
---
|
|
|
|
--- a/drivers/bcma/driver_chipcommon_sflash.c
|
|
+++ b/drivers/bcma/driver_chipcommon_sflash.c
|
|
@@ -146,7 +146,6 @@ int bcma_sflash_init(struct bcma_drv_cc
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
- sflash->window = BCMA_SOC_FLASH2;
|
|
sflash->blocksize = e->blocksize;
|
|
sflash->numblocks = e->numblocks;
|
|
sflash->size = sflash->blocksize * sflash->numblocks;
|
|
--- 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
|
|
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(
|
|
|
|
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(stru
|
|
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(stru
|
|
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(str
|
|
struct bcm47xxsflash *b47s = sflash->priv;
|
|
|
|
mtd_device_unregister(&b47s->mtd);
|
|
+ iounmap(b47s->window);
|
|
|
|
return 0;
|
|
}
|
|
--- 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;
|
|
--- a/include/linux/bcma/bcma_driver_chipcommon.h
|
|
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
|
|
@@ -588,7 +588,6 @@ struct bcma_pflash {
|
|
#ifdef CONFIG_BCMA_SFLASH
|
|
struct bcma_sflash {
|
|
bool present;
|
|
- u32 window;
|
|
u32 blocksize;
|
|
u16 numblocks;
|
|
u32 size;
|