[POWERPC] qe: miscellaneous code improvements and fixes to the QE library

This patch makes numerous miscellaneous code improvements to the QE library.

1. Remove struct ucc_common and merge ucc_init_guemr() into ucc_set_type()
   (every caller of ucc_init_guemr() also calls ucc_set_type()).  Modify all
   callers of ucc_set_type() accordingly.

2. Remove the unused enum ucc_pram_initial_offset.

3. Refactor qe_setbrg(), also implement work-around for errata QE_General4.

4. Several printk() calls were missing the terminating \n.

5. Add __iomem where needed, and change u16 to __be16 and u32 to __be32 where
   appropriate.

6. In ucc_slow_init() the RBASE and TBASE registers in the PRAM were programmed
   with the wrong value.

7. Add the protocol type to struct us_info and updated ucc_slow_init() to
   use it, instead of always programming QE_CR_PROTOCOL_UNSPECIFIED.

8. Rename ucc_slow_restart_x() to ucc_slow_restart_tx()

9. Add several macros in qe.h (mostly for slow UCC support, but also to
   standardize some naming convention) and remove several unused macros.

10. Update ucc_geth.c to use the new macros.

11. Add ucc_slow_info.protocol to specify which QE_CR_PROTOCOL_xxx protcol
    to use when initializing the UCC in ucc_slow_init().

12. Rename ucc_slow_pram.rfcr to rbmr and ucc_slow_pram.tfcr to tbmr, since
    these are the real names of the registers.

13. Use the setbits, clrbits, and clrsetbits where appropriate.

14. Refactor ucc_set_qe_mux_rxtx().

15. Remove all instances of 'volatile'.

16. Simplify get_cmxucr_reg();

17. Replace qe_mux.cmxucrX with qe_mux.cmxucr[].

18. Updated struct ucc_geth because struct ucc_fast is not padded any more.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 5 insertions, 4 deletions

diff --git a/include/asm-powerpc/ucc_slow.h b/include/asm-powerpc/ucc_slow.h
index fdaac9d762bb..0980e6ad335b 100644
--- a/include/asm-powerpc/ucc_slow.h
+++ b/include/asm-powerpc/ucc_slow.h
@@ -148,9 +148,10 @@ enum ucc_slow_diag_mode {
 
 struct ucc_slow_info {
         int ucc_num;
+        int protocol;                   /* QE_CR_PROTOCOL_xxx */
         enum qe_clock rx_clock;
         enum qe_clock tx_clock;
-        u32 regs;
+        phys_addr_t regs;
         int irq;
         u16 uccm_mask;
         int data_mem_part;
@@ -186,7 +187,7 @@ struct ucc_slow_info {
 
 struct ucc_slow_private {
         struct ucc_slow_info *us_info;
-        struct ucc_slow *us_regs;       /* a pointer to memory map of UCC regs */
+        struct ucc_slow __iomem *us_regs; /* Ptr to memory map of UCC regs */
         struct ucc_slow_pram *us_pram;  /* a pointer to the parameter RAM */
         u32 us_pram_offset;
         int enabled_tx;         /* Whether channel is enabled for Tx (ENT) */
@@ -277,12 +278,12 @@ void ucc_slow_graceful_stop_tx(struct ucc_slow_private * uccs);
  */
 void ucc_slow_stop_tx(struct ucc_slow_private * uccs);
 
-/* ucc_slow_restart_x
+/* ucc_slow_restart_tx
  * Restarts transmitting on a specified slow UCC.
  *
  * uccs - (In) pointer to the slow UCC structure.
  */
-void ucc_slow_restart_x(struct ucc_slow_private * uccs);
+void ucc_slow_restart_tx(struct ucc_slow_private *uccs);
 
 u32 ucc_slow_get_qe_cr_subblock(int uccs_num);