Blackfin: Allow bf548 ATAPI to be routed to GPIO

By default, it is routed to async memory address. In GPIO case,
GPIO peripheral PINs should be requested in advance.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

2 files changed, 52 insertions, 19 deletions

diff --git a/arch/blackfin/mach-bf548/Kconfig b/arch/blackfin/mach-bf548/Kconfig
index dcf657159051..8d24eaabe589 100644
--- a/arch/blackfin/mach-bf548/Kconfig
+++ b/arch/blackfin/mach-bf548/Kconfig
@@ -11,6 +11,13 @@ config DEB_DMA_URGENT
         help
           Treat any DEB1, DEB2 and DEB3 request as Urgent
 
+config BF548_ATAPI_ALTERNATIVE_PORT
+        bool "BF548 ATAPI alternative port via GPIO"
+        help
+          BF548 ATAPI data and address PINs can be routed through
+          async address or GPIO port F and G. Select y to route it
+          to GPIO.
+
 comment "Interrupt Priority Assignment"
 menu "Priority"
 
diff --git a/arch/blackfin/mach-bf548/include/mach/portmux.h b/arch/blackfin/mach-bf548/include/mach/portmux.h
index ffb1d0a44b4d..ce372ba0f046 100644
--- a/arch/blackfin/mach-bf548/include/mach/portmux.h
+++ b/arch/blackfin/mach-bf548/include/mach/portmux.h
@@ -167,22 +167,42 @@
 #define P_PPI0_D13      (P_DEFINED | P_IDENT(GPIO_PF13) | P_FUNCT(0))
 #define P_PPI0_D14      (P_DEFINED | P_IDENT(GPIO_PF14) | P_FUNCT(0))
 #define P_PPI0_D15      (P_DEFINED | P_IDENT(GPIO_PF15) | P_FUNCT(0))
-#define P_ATAPI_D0A     (P_DEFINED | P_IDENT(GPIO_PF0) | P_FUNCT(1))
-#define P_ATAPI_D1A     (P_DEFINED | P_IDENT(GPIO_PF1) | P_FUNCT(1))
-#define P_ATAPI_D2A     (P_DEFINED | P_IDENT(GPIO_PF2) | P_FUNCT(1))
-#define P_ATAPI_D3A     (P_DEFINED | P_IDENT(GPIO_PF3) | P_FUNCT(1))
-#define P_ATAPI_D4A     (P_DEFINED | P_IDENT(GPIO_PF4) | P_FUNCT(1))
-#define P_ATAPI_D5A     (P_DEFINED | P_IDENT(GPIO_PF5) | P_FUNCT(1))
-#define P_ATAPI_D6A     (P_DEFINED | P_IDENT(GPIO_PF6) | P_FUNCT(1))
-#define P_ATAPI_D7A     (P_DEFINED | P_IDENT(GPIO_PF7) | P_FUNCT(1))
-#define P_ATAPI_D8A     (P_DEFINED | P_IDENT(GPIO_PF8) | P_FUNCT(1))
-#define P_ATAPI_D9A     (P_DEFINED | P_IDENT(GPIO_PF9) | P_FUNCT(1))
-#define P_ATAPI_D10A    (P_DEFINED | P_IDENT(GPIO_PF10) | P_FUNCT(1))
-#define P_ATAPI_D11A    (P_DEFINED | P_IDENT(GPIO_PF11) | P_FUNCT(1))
-#define P_ATAPI_D12A    (P_DEFINED | P_IDENT(GPIO_PF12) | P_FUNCT(1))
-#define P_ATAPI_D13A    (P_DEFINED | P_IDENT(GPIO_PF13) | P_FUNCT(1))
-#define P_ATAPI_D14A    (P_DEFINED | P_IDENT(GPIO_PF14) | P_FUNCT(1))
-#define P_ATAPI_D15A    (P_DEFINED | P_IDENT(GPIO_PF15) | P_FUNCT(1))
+
+#ifdef CONFIG_BF548_ATAPI_ALTERNATIVE_PORT
+# define P_ATAPI_D0A    (P_DEFINED | P_IDENT(GPIO_PF0) | P_FUNCT(1))
+# define P_ATAPI_D1A    (P_DEFINED | P_IDENT(GPIO_PF1) | P_FUNCT(1))
+# define P_ATAPI_D2A    (P_DEFINED | P_IDENT(GPIO_PF2) | P_FUNCT(1))
+# define P_ATAPI_D3A    (P_DEFINED | P_IDENT(GPIO_PF3) | P_FUNCT(1))
+# define P_ATAPI_D4A    (P_DEFINED | P_IDENT(GPIO_PF4) | P_FUNCT(1))
+# define P_ATAPI_D5A    (P_DEFINED | P_IDENT(GPIO_PF5) | P_FUNCT(1))
+# define P_ATAPI_D6A    (P_DEFINED | P_IDENT(GPIO_PF6) | P_FUNCT(1))
+# define P_ATAPI_D7A    (P_DEFINED | P_IDENT(GPIO_PF7) | P_FUNCT(1))
+# define P_ATAPI_D8A    (P_DEFINED | P_IDENT(GPIO_PF8) | P_FUNCT(1))
+# define P_ATAPI_D9A    (P_DEFINED | P_IDENT(GPIO_PF9) | P_FUNCT(1))
+# define P_ATAPI_D10A   (P_DEFINED | P_IDENT(GPIO_PF10) | P_FUNCT(1))
+# define P_ATAPI_D11A   (P_DEFINED | P_IDENT(GPIO_PF11) | P_FUNCT(1))
+# define P_ATAPI_D12A   (P_DEFINED | P_IDENT(GPIO_PF12) | P_FUNCT(1))
+# define P_ATAPI_D13A   (P_DEFINED | P_IDENT(GPIO_PF13) | P_FUNCT(1))
+# define P_ATAPI_D14A   (P_DEFINED | P_IDENT(GPIO_PF14) | P_FUNCT(1))
+# define P_ATAPI_D15A   (P_DEFINED | P_IDENT(GPIO_PF15) | P_FUNCT(1))
+#else
+# define P_ATAPI_D0A    (P_DONTCARE)
+# define P_ATAPI_D1A    (P_DONTCARE)
+# define P_ATAPI_D2A    (P_DONTCARE)
+# define P_ATAPI_D3A    (P_DONTCARE)
+# define P_ATAPI_D4A    (P_DONTCARE)
+# define P_ATAPI_D5A    (P_DONTCARE)
+# define P_ATAPI_D6A    (P_DONTCARE)
+# define P_ATAPI_D7A    (P_DONTCARE)
+# define P_ATAPI_D8A    (P_DONTCARE)
+# define P_ATAPI_D9A    (P_DONTCARE)
+# define P_ATAPI_D10A   (P_DONTCARE)
+# define P_ATAPI_D11A   (P_DONTCARE)
+# define P_ATAPI_D12A   (P_DONTCARE)
+# define P_ATAPI_D13A   (P_DONTCARE)
+# define P_ATAPI_D14A   (P_DONTCARE)
+# define P_ATAPI_D15A   (P_DONTCARE)
+#endif
 
 #define P_PPI0_CLK      (P_DEFINED | P_IDENT(GPIO_PG0) | P_FUNCT(0))
 #define P_PPI0_FS1      (P_DEFINED | P_IDENT(GPIO_PG1) | P_FUNCT(0))
@@ -200,9 +220,15 @@
 #define P_CAN0_RX       (P_DEFINED | P_IDENT(GPIO_PG13) | P_FUNCT(0))
 #define P_CAN1_TX       (P_DEFINED | P_IDENT(GPIO_PG14) | P_FUNCT(0))
 #define P_CAN1_RX       (P_DEFINED | P_IDENT(GPIO_PG15) | P_FUNCT(0))
-#define P_ATAPI_A0A     (P_DEFINED | P_IDENT(GPIO_PG2) | P_FUNCT(1))
-#define P_ATAPI_A1A     (P_DEFINED | P_IDENT(GPIO_PG3) | P_FUNCT(1))
-#define P_ATAPI_A2A     (P_DEFINED | P_IDENT(GPIO_PG4) | P_FUNCT(1))
+#ifdef CONFIG_BF548_ATAPI_ALTERNATIVE_PORT
+# define P_ATAPI_A0A    (P_DEFINED | P_IDENT(GPIO_PG2) | P_FUNCT(1))
+# define P_ATAPI_A1A    (P_DEFINED | P_IDENT(GPIO_PG3) | P_FUNCT(1))
+# define P_ATAPI_A2A    (P_DEFINED | P_IDENT(GPIO_PG4) | P_FUNCT(1))
+#else
+# define P_ATAPI_A0A    (P_DONTCARE)
+# define P_ATAPI_A1A    (P_DONTCARE)
+# define P_ATAPI_A2A    (P_DONTCARE)
+#endif
 #define P_HOST_CE       (P_DEFINED | P_IDENT(GPIO_PG5) | P_FUNCT(1))
 #define P_HOST_RD       (P_DEFINED | P_IDENT(GPIO_PG6) | P_FUNCT(1))
 #define P_HOST_WR       (P_DEFINED | P_IDENT(GPIO_PG7) | P_FUNCT(1))