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sb/intel/common: Tidy up SMBus block commands 

I forgot to push these changes before merging commit
  1b04aa2 sb/intel/common: Fix SMBus block commands

Change-Id: I7217f8c0cc78f2161faf31a4c49e3e9515026d15
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/21115
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Kyösti Mälkki 2017-08-20 23:48:23 +03:00
parent 916b331a8d
commit c17e855da0
2 changed files with 8 additions and 5 deletions
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11
src/southbridge/intel/common/smbus.c
View File

@ -47,6 +47,7 @@
#define SMBHSTSTS_HOST_BUSY (1 << 0)
#define SMBUS_TIMEOUT (10 * 1000 * 100)
#define SMBUS_BLOCK_MAXLEN 32
static void smbus_delay(void)
{
@ -203,7 +204,7 @@ int do_smbus_block_read(unsigned int smbus_base, u8 device, u8 cmd,
if (smbus_wait_until_ready(smbus_base) < 0)
return SMBUS_WAIT_UNTIL_READY_TIMEOUT;
max_bytes = MIN(32, max_bytes);
max_bytes = MIN(SMBUS_BLOCK_MAXLEN, max_bytes);
/* Set up transaction */
/* Disable interrupts */
@ -243,8 +244,7 @@ int do_smbus_block_read(unsigned int smbus_base, u8 device, u8 cmd,
if (status & SMBHSTSTS_BYTE_DONE) { /* Byte done */
if (bytes_read < max_bytes) {
*buf = inb(smbus_base + SMBBLKDAT);
buf++;
*buf++ = inb(smbus_base + SMBBLKDAT);
bytes_read++;
}
@ -271,7 +271,7 @@ int do_smbus_block_write(unsigned int smbus_base, u8 device, u8 cmd,
int bytes_sent = 0;
unsigned int loops = SMBUS_TIMEOUT;
if (bytes > 32)
if (bytes > SMBUS_BLOCK_MAXLEN)
return SMBUS_ERROR;
if (smbus_wait_until_ready(smbus_base) < 0)
@ -329,6 +329,9 @@ int do_smbus_block_write(unsigned int smbus_base, u8 device, u8 cmd,
}
} while ((status & SMBHSTSTS_HOST_BUSY) && loops);
if (bytes_sent < bytes)
return SMBUS_ERROR;
return bytes_sent;
}

2
src/southbridge/intel/common/smbus.h
View File

@ -37,7 +37,7 @@ int do_smbus_read_byte(unsigned int smbus_base, u8 device,
int do_smbus_write_byte(unsigned int smbus_base, u8 device,
unsigned int address, unsigned int data);
int do_smbus_block_read(unsigned int smbus_base, u8 device,
u8 cmd, unsigned int bytes, u8 *buf);
u8 cmd, unsigned int max_bytes, u8 *buf);
int do_smbus_block_write(unsigned int smbus_base, u8 device,
u8 cmd, unsigned int bytes, const u8 *buf);
/* Only since ICH5 */