powerpc/5200: add LocalPlus bus FIFO device driver
This is a driver for the FIFO device on the LocalPlus bus on an mpc5200 system.
The driver supports programmed I/O through the FIFO as well as setting up DMA
via the BestComm engine through the FIFO.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/arch/powerpc/include/asm/mpc52xx.h b/arch/powerpc/include/asm/mpc52xx.h
index 6716850..707ab75 100644
--- a/arch/powerpc/include/asm/mpc52xx.h
+++ b/arch/powerpc/include/asm/mpc52xx.h
@@ -283,6 +283,45 @@
int continuous);
extern void mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt);
+/* mpc52xx_lpbfifo.c */
+#define MPC52XX_LPBFIFO_FLAG_READ (0)
+#define MPC52XX_LPBFIFO_FLAG_WRITE (1<<0)
+#define MPC52XX_LPBFIFO_FLAG_NO_INCREMENT (1<<1)
+#define MPC52XX_LPBFIFO_FLAG_NO_DMA (1<<2)
+#define MPC52XX_LPBFIFO_FLAG_POLL_DMA (1<<3)
+
+struct mpc52xx_lpbfifo_request {
+ struct list_head list;
+
+ /* localplus bus address */
+ unsigned int cs;
+ size_t offset;
+
+ /* Memory address */
+ void *data;
+ phys_addr_t data_phys;
+
+ /* Details of transfer */
+ size_t size;
+ size_t pos; /* current position of transfer */
+ int flags;
+
+ /* What to do when finished */
+ void (*callback)(struct mpc52xx_lpbfifo_request *);
+
+ void *priv; /* Driver private data */
+
+ /* statistics */
+ int irq_count;
+ int irq_ticks;
+ u8 last_byte;
+ int buffer_not_done_cnt;
+};
+
+extern int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req);
+extern void mpc52xx_lpbfifo_abort(struct mpc52xx_lpbfifo_request *req);
+extern void mpc52xx_lpbfifo_poll(void);
+
/* mpc52xx_pic.c */
extern void mpc52xx_init_irq(void);
extern unsigned int mpc52xx_get_irq(void);