[U-Boot-Users] [PATCH] net: add 16 bit support for smc911x

[Jens Gehrlein]

Hi Ben, Magnus,

here is my patch to enable 2x16 bit accesses to the LAN9x1x.
I still not have a HW, so may I ask you to test it and, if applicable,
fix the code?

Best Regards,
Jens

---

 drivers/net/smc911x.c |   17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)


diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index d22c889..841a64d 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -30,6 +30,8 @@
 #include <net.h>
 #include <miiphy.h>
 
+#define CONFIG_DRIVER_SMC911X_16_BIT 1
+
 #ifdef CONFIG_DRIVER_SMC911X_32_BIT
 static inline u32 reg_read(u32 addr)
 {
@@ -39,8 +41,21 @@ static inline void reg_write(u32 addr, u32 val)
 {
 	*(volatile u32*)addr = val;
 }
+#elif CONFIG_DRIVER_SMC911X_16_BIT
+static inline u32 reg_read(u32 addr)
+{
+	u32 val_lo = (u32)(*(volatile u16*)addr);
+	u32 val_hi = (u32)(*(volatile u16*)(addr | 2));
+
+	return (val_hi << 16) | val_lo;
+}
+static inline void reg_write(u32 addr, u32 val)
+{
+	*(volatile u16*)addr = (u16)val;
+	*(volatile u16*)(addr | 2) = (u16)(val >> 16);
+}
 #else
-#error "SMC911X: Only 32-bit bus is supported"
+#error "SMC911X: undefined buswidth"
 #endif
 
 #define mdelay(n)       udelay((n)*1000)