powerpc/mpc5200: Add MDMA/UDMA support to MPC5200 ATA driver

This patch adds MDMA/UDMA support using BestComm for DMA on the MPC5200
platform.  Based heavily on previous work by Freescale (Bernard Kuhn,
John Rigby) and Domen Puncer.

With this patch, a SanDisk Extreme IV CF card gets read speeds of
approximately 26.70 MB/sec.
Signed-off-by: Tim Yamin <plasm@roo.me.uk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

arch/powerpc/sysdev/bestcomm/ata.h

@@ -20,18 +20,11 @@ struct bcom_ata_bd {
 	u32	dst_pa;
 };
 
-extern struct bcom_task *
-bcom_ata_init(int queue_len, int maxbufsize);
-
-extern void
-bcom_ata_rx_prepare(struct bcom_task *tsk);
-
-extern void
-bcom_ata_tx_prepare(struct bcom_task *tsk);
-
-extern void
-bcom_ata_reset_bd(struct bcom_task *tsk);
-
+extern struct bcom_task * bcom_ata_init(int queue_len, int maxbufsize);
+extern void bcom_ata_rx_prepare(struct bcom_task *tsk);
+extern void bcom_ata_tx_prepare(struct bcom_task *tsk);
+extern void bcom_ata_reset_bd(struct bcom_task *tsk);
+extern void bcom_ata_release(struct bcom_task *tsk);
 
 #endif /* __BESTCOMM_ATA_H__ */
 

drivers/ata/Kconfig

@@ -456,7 +456,8 @@ config PATA_MARVELL
 
 config PATA_MPC52xx
 	tristate "Freescale MPC52xx SoC internal IDE"
-	depends on PPC_MPC52xx
+	depends on PPC_MPC52xx && PPC_BESTCOMM
+	select PPC_BESTCOMM_ATA
 	help
 	  This option enables support for integrated IDE controller
 	  of the Freescale MPC52xx SoC.