dm: sf: Add a uclass for SPI flash

[karo-tx-uboot.git] / include / spi_flash.h

diff --git a/include/spi_flash.h b/include/spi_flash.h
index 223e4420a5ea5f56c69527a74104af04cb3c4691..5913b39e268ee30598de449d03447a8205c80dae 100644 (file)
--- 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);