update flash locking code

SVN-Revision: 16359

target/linux/ar71xx/files/arch/mips/ar71xx/ar71xx.c

@@ -17,7 +17,6 @@
 #include <asm/mach-ar71xx/ar71xx.h>
 
 static DEFINE_MUTEX(ar71xx_flash_mutex);
-static int ar71xx_flash_lock_enabled;
 
 void __iomem *ar71xx_ddr_base;
 EXPORT_SYMBOL_GPL(ar71xx_ddr_base);
@@ -102,21 +101,14 @@ void ar71xx_ddr_flush(u32 reg)
 }
 EXPORT_SYMBOL_GPL(ar71xx_ddr_flush);
 
-void  __init ar71xx_flash_lock_enable(void)
-{
-	ar71xx_flash_lock_enabled = 1;
-}
-
 void ar71xx_flash_acquire(void)
 {
-	if (ar71xx_flash_lock_enabled)
-		mutex_lock(&ar71xx_flash_mutex);
+	mutex_lock(&ar71xx_flash_mutex);
 }
 EXPORT_SYMBOL_GPL(ar71xx_flash_acquire);
 
 void ar71xx_flash_release(void)
 {
-	if (ar71xx_flash_lock_enabled)
-		mutex_unlock(&ar71xx_flash_mutex);
+	mutex_unlock(&ar71xx_flash_mutex);
 }
 EXPORT_SYMBOL_GPL(ar71xx_flash_release);

target/linux/ar71xx/files/arch/mips/ar71xx/mach-ap83.c

@@ -221,7 +221,7 @@ static void __init ap83_generic_setup(void)
 
 static void __init ap83_040_setup(void)
 {
-	ar71xx_flash_lock_enable();
+	ap83_flash_data.is_shared=1;
 	ap83_generic_setup();
 	platform_device_register(&ap83_040_spi_device);
 }

target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h

@@ -422,7 +422,6 @@ void ar71xx_device_start(u32 mask);
 #define SPI_IOC_CS2		SPI_IOC_CS(2)
 #define SPI_IOC_CS_ALL		(SPI_IOC_CS0 | SPI_IOC_CS1 | SPI_IOC_CS2)
 
-void ar71xx_flash_lock_enable(void) __init;
 void ar71xx_flash_acquire(void);
 void ar71xx_flash_release(void);
 

target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/platform.h

@@ -55,6 +55,7 @@ struct ar71xx_spi_platform_data {
 
 struct ar91xx_flash_platform_data {
 	unsigned int		width;
+	u8			is_shared:1;
 #ifdef CONFIG_MTD_PARTITIONS
 	unsigned int		nr_parts;
 	struct mtd_partition	*parts;

target/linux/ar71xx/files/drivers/mtd/maps/ar91xx_flash.c

@@ -60,6 +60,41 @@ static void ar91xx_flash_write(struct map_info *map, map_word d,
 	mb();
 }
 
+static map_word ar91xx_flash_read_lock(struct map_info *map, unsigned long ofs)
+{
+	map_word ret;
+
+	ar71xx_flash_acquire();
+	ret = ar91xx_flash_read(map, ofs);
+	ar71xx_flash_release();
+
+	return ret;
+}
+
+static void ar91xx_flash_write_lock(struct map_info *map, map_word d,
+			       unsigned long ofs)
+{
+	ar71xx_flash_acquire();
+	ar91xx_flash_write(map, d, ofs);
+	ar71xx_flash_release();
+}
+
+static void ar91xx_flash_copy_from_lock(struct map_info *map, void *to,
+					unsigned long from, ssize_t len)
+{
+	ar71xx_flash_acquire();
+	inline_map_copy_from(map, to, from, len);
+	ar71xx_flash_release();
+}
+
+static void ar91xx_flash_copy_to_lock(struct map_info *map, unsigned long to,
+				      const void *from, ssize_t len)
+{
+	ar71xx_flash_acquire();
+	inline_map_copy_to(map, to, from, len);
+	ar71xx_flash_release();
+}
+
 static int ar91xx_flash_remove(struct platform_device *pdev)
 {
 	struct ar91xx_flash_platform_data *pdata;
@@ -152,8 +187,15 @@ static int ar91xx_flash_probe(struct platform_device *pdev)
 	}
 
 	simple_map_init(&info->map);
-	info->map.read = ar91xx_flash_read;
-	info->map.write = ar91xx_flash_write;
+	if (pdata->is_shared) {
+		info->map.read = ar91xx_flash_read_lock;
+		info->map.write = ar91xx_flash_write_lock;
+		info->map.copy_from = ar91xx_flash_copy_from_lock;
+		info->map.copy_to = ar91xx_flash_copy_to_lock;
+	} else {
+		info->map.read = ar91xx_flash_read;
+		info->map.write = ar91xx_flash_write;
+	}
 
 	probe_type = rom_probe_types;
 	for (; info->mtd == NULL && *probe_type != NULL; probe_type++)