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authorSimon Glass <sjg@chromium.org>2014-10-13 23:42:06 -0600
committerSimon Glass <sjg@chromium.org>2014-10-22 10:36:50 -0600
commit4c2dbefde58917205af51a2c20b3069e01e55cf4 (patch)
treee144692e3657ecd26f77c19dab4f90312b75d3e1 /include
parentae242cbfd0fc2b9e791688b3d9d6a19900ff3d31 (diff)
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dm: sf: Add a uclass for SPI flash
Add a driver model uclass for SPI flash which supports the common operations (read, write, erase). Since we must keep support for the non-dm interface, some modification of the spi_flash header is required. CONFIG_DM_SPI_FLASH is used to enable driver model for SPI flash. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Diffstat (limited to 'include')
-rw-r--r--include/dm/uclass-id.h1
-rw-r--r--include/spi_flash.h70
2 files changed, 71 insertions, 0 deletions
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 6e56382..c92adb4 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -25,6 +25,7 @@ enum uclass_id {
UCLASS_SERIAL, /* Serial UART */
UCLASS_SPI, /* SPI bus */
UCLASS_SPI_GENERIC, /* Generic SPI flash target */
+ UCLASS_SPI_FLASH, /* SPI flash */
UCLASS_COUNT,
UCLASS_INVALID = -1,
diff --git a/include/spi_flash.h b/include/spi_flash.h
index 223e442..5913b39 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -15,6 +15,7 @@
#ifndef _SPI_FLASH_H_
#define _SPI_FLASH_H_
+#include <dm.h> /* Because we dereference struct udevice here */
#include <linux/types.h>
#ifndef CONFIG_SF_DEFAULT_SPEED
@@ -61,7 +62,12 @@ struct spi_slave;
* return 0 - Success, 1 - Failure
*/
struct spi_flash {
+#ifdef CONFIG_DM_SPI_FLASH
struct spi_slave *spi;
+ struct udevice *dev;
+#else
+ struct spi_slave *spi;
+#endif
const char *name;
u8 dual_flash;
u8 shift;
@@ -82,12 +88,75 @@ struct spi_flash {
u8 dummy_byte;
void *memory_map;
+#ifndef CONFIG_DM_SPI_FLASH
+ /*
+ * These are not strictly needed for driver model, but keep them here
+ * whilt the transition is in progress.
+ *
+ * Normally each driver would provide its own operations, but for
+ * SPI flash most chips use the same algorithms. One approach is
+ * to create a 'common' SPI flash device which knows how to talk
+ * to most devices, and then allow other drivers to be used instead
+ * if requird, perhaps with a way of scanning through the list to
+ * find the driver that matches the device.
+ */
int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
int (*write)(struct spi_flash *flash, u32 offset, size_t len,
const void *buf);
int (*erase)(struct spi_flash *flash, u32 offset, size_t len);
+#endif
+};
+
+struct dm_spi_flash_ops {
+ int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf);
+ int (*write)(struct udevice *dev, u32 offset, size_t len,
+ const void *buf);
+ int (*erase)(struct udevice *dev, u32 offset, size_t len);
};
+/* Access the serial operations for a device */
+#define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
+
+#ifdef CONFIG_DM_SPI_FLASH
+int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
+ unsigned int max_hz, unsigned int spi_mode,
+ struct udevice **devp);
+
+/* Compatibility function - this is the old U-Boot API */
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int spi_mode);
+
+/* Compatibility function - this is the old U-Boot API */
+void spi_flash_free(struct spi_flash *flash);
+
+int spi_flash_remove(struct udevice *flash);
+
+static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
+ size_t len, void *buf)
+{
+ return sf_get_ops(flash->dev)->read(flash->dev, offset, len, buf);
+}
+
+static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
+ size_t len, const void *buf)
+{
+ return sf_get_ops(flash->dev)->write(flash->dev, offset, len, buf);
+}
+
+static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
+ size_t len)
+{
+ return sf_get_ops(flash->dev)->erase(flash->dev, offset, len);
+}
+
+struct sandbox_state;
+
+int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
+ struct udevice *bus, int of_offset, const char *spec);
+
+void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
+
+#else
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode);
@@ -122,6 +191,7 @@ static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
{
return flash->erase(flash, offset, len);
}
+#endif
void spi_boot(void) __noreturn;
void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst);