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smc911x: add 16 bit support

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Signed-off-by: Jens Gehrlein <sew_s@tqs.de>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Jens Gehrlein 2008-05-05 14:06:11 +02:00 committed by Ben Warren
parent 2c8d41969b
commit 557b377d8b
2 changed files with 34 additions and 2 deletions
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15
README
View file

@ -786,6 +786,21 @@ The following options need to be configured:
Define this to use i/o functions instead of macros
(some hardware wont work with macros)
CONFIG_DRIVER_SMC911X
Support for SMSC's LAN911x and LAN921x chips
CONFIG_DRIVER_SMC911X_BASE
Define this to hold the physical address
of the device (I/O space)
CONFIG_DRIVER_SMC911X_32_BIT
Define this if data bus is 32 bits
CONFIG_DRIVER_SMC911X_16_BIT
Define this if data bus is 16 bits. If your processor
automatically converts one 32 bit word to two 16 bit
words you may also try CONFIG_DRIVER_SMC911X_32_BIT.
- USB Support:
At the moment only the UHCI host controller is
supported (PIP405, MIP405, MPC5200); define

21
drivers/net/smc911x.c
View file

@ -30,6 +30,12 @@
#include <net.h>
#include <miiphy.h>
#if defined (CONFIG_DRIVER_SMC911X_32_BIT) && \
defined (CONFIG_DRIVER_SMC911X_16_BIT)
#error "SMC911X: Only one of CONFIG_DRIVER_SMC911X_32_BIT and \
CONFIG_DRIVER_SMC911X_16_BIT shall be set"
#endif
#ifdef CONFIG_DRIVER_SMC911X_32_BIT
static inline u32 reg_read(u32 addr)
{
@ -39,9 +45,20 @@ 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)
{
volatile u16 *addr_16 = (u16 *)addr;
return ((*addr_16 & 0x0000ffff) | (*(addr_16 + 1) << 16));
}
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"
#endif
#error "SMC911X: undefined bus width"
#endif /* CONFIG_DRIVER_SMC911X_16_BIT */
#define mdelay(n) udelay((n)*1000)