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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2009-05-25 22:04:02 +0900
committerRalf Baechle <ralf@linux-mips.org>2009-06-17 11:06:27 +0100
commitc3b28ae260d99a5364a31210a36a3246bd9647f7 (patch)
treeb24ffef4b1352f09af2944eea78685a7e3d38686 /arch/mips/txx9
parent05f94eebd55ef69a354d3ea70179e40ea4c34de6 (diff)
downloadvexpress-lsk-c3b28ae260d99a5364a31210a36a3246bd9647f7.tar.gz
MIPS: TXx9: Add SRAMC support
Add a sysdev to access SRAM in TXx9 SoCs via sysfs. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/txx9')
-rw-r--r--arch/mips/txx9/generic/setup.c84
-rw-r--r--arch/mips/txx9/generic/setup_tx4938.c6
-rw-r--r--arch/mips/txx9/generic/setup_tx4939.c6
-rw-r--r--arch/mips/txx9/rbtx4938/setup.c1
-rw-r--r--arch/mips/txx9/rbtx4939/setup.c1
5 files changed, 98 insertions, 0 deletions
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 7f910125761..3b7d77d61ce 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -24,6 +24,7 @@
#include <linux/serial_core.h>
#include <linux/mtd/physmap.h>
#include <linux/leds.h>
+#include <linux/sysdev.h>
#include <asm/bootinfo.h>
#include <asm/time.h>
#include <asm/reboot.h>
@@ -912,3 +913,86 @@ void __init txx9_aclc_init(unsigned long baseaddr, int irq,
platform_device_put(pdev);
#endif
}
+
+static struct sysdev_class txx9_sramc_sysdev_class;
+
+struct txx9_sramc_sysdev {
+ struct sys_device dev;
+ struct bin_attribute bindata_attr;
+ void __iomem *base;
+};
+
+static ssize_t txx9_sram_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
+{
+ struct txx9_sramc_sysdev *dev = bin_attr->private;
+ size_t ramsize = bin_attr->size;
+
+ if (pos >= ramsize)
+ return 0;
+ if (pos + size > ramsize)
+ size = ramsize - pos;
+ memcpy_fromio(buf, dev->base + pos, size);
+ return size;
+}
+
+static ssize_t txx9_sram_write(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t pos, size_t size)
+{
+ struct txx9_sramc_sysdev *dev = bin_attr->private;
+ size_t ramsize = bin_attr->size;
+
+ if (pos >= ramsize)
+ return 0;
+ if (pos + size > ramsize)
+ size = ramsize - pos;
+ memcpy_toio(dev->base + pos, buf, size);
+ return size;
+}
+
+void __init txx9_sramc_init(struct resource *r)
+{
+ struct txx9_sramc_sysdev *dev;
+ size_t size;
+ int err;
+
+ if (!txx9_sramc_sysdev_class.name) {
+ txx9_sramc_sysdev_class.name = "txx9_sram";
+ err = sysdev_class_register(&txx9_sramc_sysdev_class);
+ if (err) {
+ txx9_sramc_sysdev_class.name = NULL;
+ return;
+ }
+ }
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return;
+ size = resource_size(r);
+ dev->base = ioremap(r->start, size);
+ if (!dev->base)
+ goto exit;
+ dev->dev.cls = &txx9_sramc_sysdev_class;
+ dev->bindata_attr.attr.name = "bindata";
+ dev->bindata_attr.attr.mode = S_IRUSR | S_IWUSR;
+ dev->bindata_attr.read = txx9_sram_read;
+ dev->bindata_attr.write = txx9_sram_write;
+ dev->bindata_attr.size = size;
+ dev->bindata_attr.private = dev;
+ err = sysdev_register(&dev->dev);
+ if (err)
+ goto exit;
+ err = sysfs_create_bin_file(&dev->dev.kobj, &dev->bindata_attr);
+ if (err) {
+ sysdev_unregister(&dev->dev);
+ goto exit;
+ }
+ return;
+exit:
+ if (dev) {
+ if (dev->base)
+ iounmap(dev->base);
+ kfree(dev);
+ }
+}
diff --git a/arch/mips/txx9/generic/setup_tx4938.c b/arch/mips/txx9/generic/setup_tx4938.c
index 4dfdb52e866..eb208011023 100644
--- a/arch/mips/txx9/generic/setup_tx4938.c
+++ b/arch/mips/txx9/generic/setup_tx4938.c
@@ -425,6 +425,12 @@ void __init tx4938_aclc_init(void)
1, 0, 1);
}
+void __init tx4938_sramc_init(void)
+{
+ if (tx4938_sram_resource.start)
+ txx9_sramc_init(&tx4938_sram_resource);
+}
+
static void __init tx4938_stop_unused_modules(void)
{
__u64 pcfg, rst = 0, ckd = 0;
diff --git a/arch/mips/txx9/generic/setup_tx4939.c b/arch/mips/txx9/generic/setup_tx4939.c
index 71396863f54..df13a891fb4 100644
--- a/arch/mips/txx9/generic/setup_tx4939.c
+++ b/arch/mips/txx9/generic/setup_tx4939.c
@@ -494,6 +494,12 @@ void __init tx4939_aclc_init(void)
TXX9_IRQ_BASE + TX4939_IR_ACLC, 1, 0, 1);
}
+void __init tx4939_sramc_init(void)
+{
+ if (tx4939_sram_resource.start)
+ txx9_sramc_init(&tx4939_sram_resource);
+}
+
static void __init tx4939_stop_unused_modules(void)
{
__u64 pcfg, rst = 0, ckd = 0;
diff --git a/arch/mips/txx9/rbtx4938/setup.c b/arch/mips/txx9/rbtx4938/setup.c
index 8da66e956ee..d66509b1428 100644
--- a/arch/mips/txx9/rbtx4938/setup.c
+++ b/arch/mips/txx9/rbtx4938/setup.c
@@ -358,6 +358,7 @@ static void __init rbtx4938_device_init(void)
tx4938_dmac_init(0, 2);
tx4938_aclc_init();
platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
+ tx4938_sramc_init();
txx9_iocled_init(RBTX4938_LED_ADDR - IO_BASE, -1, 8, 1, "green", NULL);
}
diff --git a/arch/mips/txx9/rbtx4939/setup.c b/arch/mips/txx9/rbtx4939/setup.c
index d5ad5abb80d..b9196966447 100644
--- a/arch/mips/txx9/rbtx4939/setup.c
+++ b/arch/mips/txx9/rbtx4939/setup.c
@@ -501,6 +501,7 @@ static void __init rbtx4939_device_init(void)
tx4939_dmac_init(0, 2);
tx4939_aclc_init();
platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
+ tx4939_sramc_init();
}
static void __init rbtx4939_setup(void)