diff options
Diffstat (limited to 'src/soc/intel/common/block/smbus/smbuslib.c')
-rw-r--r-- | src/soc/intel/common/block/smbus/smbuslib.c | 161 |
1 files changed, 1 insertions, 160 deletions
diff --git a/src/soc/intel/common/block/smbus/smbuslib.c b/src/soc/intel/common/block/smbus/smbuslib.c index 0004ba7709..126adee06b 100644 --- a/src/soc/intel/common/block/smbus/smbuslib.c +++ b/src/soc/intel/common/block/smbus/smbuslib.c @@ -13,171 +13,12 @@ * GNU General Public License for more details. */ -#include <arch/io.h> #include <console/console.h> -#include <device/smbus_def.h> #include <spd_bin.h> +#include <southbridge/intel/common/smbus.h> #include <string.h> -#include <timer.h> #include "smbuslib.h" -static int smbus_wait_till_ready(u16 smbus_base) -{ - struct stopwatch sw; - unsigned char byte; - - stopwatch_init_msecs_expire(&sw, SMBUS_TIMEOUT); - do { - byte = inb(smbus_base + SMBHSTSTAT); - if (!(byte & 1)) - return 0; - } while (!stopwatch_expired(&sw)); - return -1; -} - -static int smbus_wait_till_done(u16 smbus_base) -{ - struct stopwatch sw; - unsigned char byte; - - stopwatch_init_msecs_expire(&sw, SMBUS_TIMEOUT); - do { - byte = inb(smbus_base + SMBHSTSTAT); - if (!((byte & 1) || (byte & ~((1 << 6) | (1 << 0))) == 0)) - return 0; - } while (!stopwatch_expired(&sw)); - return -1; -} - -int do_smbus_read_byte(unsigned int smbus_base, u8 device, unsigned int address) -{ - unsigned char global_status_register; - unsigned char byte; - - if (smbus_wait_till_ready(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_READY_TIMEOUT; - - /* Setup transaction */ - /* Disable interrupts */ - outb(inb(smbus_base + SMBHSTCTL) & (~1), smbus_base + SMBHSTCTL); - /* Set the device I'm talking to */ - outb(((device & 0x7f) << 1) | 1, smbus_base + SMBXMITADD); - /* Set the command/address... */ - outb(address & 0xff, smbus_base + SMBHSTCMD); - /* Set up for a byte data read */ - outb((inb(smbus_base + SMBHSTCTL) & 0xe3) | (0x2 << 2), - (smbus_base + SMBHSTCTL)); - /* Clear any lingering errors, so the transaction will run */ - outb(inb(smbus_base + SMBHSTSTAT), smbus_base + SMBHSTSTAT); - - /* Clear the data byte... */ - outb(0, smbus_base + SMBHSTDAT0); - - /* Start the command */ - outb((inb(smbus_base + SMBHSTCTL) | 0x40), - smbus_base + SMBHSTCTL); - - /* Poll for transaction completion */ - if (smbus_wait_till_done(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_DONE_TIMEOUT; - - global_status_register = inb(smbus_base + SMBHSTSTAT); - - /* Ignore the "In Use" status... */ - global_status_register &= ~(3 << 5); - - /* Read results of transaction */ - byte = inb(smbus_base + SMBHSTDAT0); - if (global_status_register != (1 << 1)) - return SMBUS_ERROR; - - return byte; -} - -int do_smbus_write_byte(unsigned int smbus_base, u8 device, unsigned int address, - unsigned int data) -{ - unsigned char global_status_register; - - if (smbus_wait_till_ready(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_READY_TIMEOUT; - - /* Setup transaction */ - /* Disable interrupts */ - outb(inb(smbus_base + SMBHSTCTL) & (~1), smbus_base + SMBHSTCTL); - /* Set the device I'm talking to */ - outb(((device & 0x7f) << 1) & ~0x01, smbus_base + SMBXMITADD); - /* Set the command/address... */ - outb(address & 0xff, smbus_base + SMBHSTCMD); - /* Set up for a byte data read */ - outb((inb(smbus_base + SMBHSTCTL) & 0xe3) | (0x2 << 2), - (smbus_base + SMBHSTCTL)); - /* Clear any lingering errors, so the transaction will run */ - outb(inb(smbus_base + SMBHSTSTAT), smbus_base + SMBHSTSTAT); - - /* Clear the data byte... */ - outb(data, smbus_base + SMBHSTDAT0); - - /* Start the command */ - outb((inb(smbus_base + SMBHSTCTL) | 0x40), - smbus_base + SMBHSTCTL); - - /* Poll for transaction completion */ - if (smbus_wait_till_done(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_DONE_TIMEOUT; - - global_status_register = inb(smbus_base + SMBHSTSTAT); - - /* Ignore the "In Use" status... */ - global_status_register &= ~(3 << 5); - - /* Read results of transaction */ - if (global_status_register != (1 << 1)) - return SMBUS_ERROR; - - return 0; -} - -int do_smbus_read_word(unsigned int smbus_base, u8 device, unsigned int address) -{ - unsigned char global_status_register; - unsigned short data; - - if (smbus_wait_till_ready(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_READY_TIMEOUT; - - /* Set up transaction */ - /* Disable interrupts */ - outb(inb(smbus_base + SMBHSTCTL) & ~1, smbus_base + SMBHSTCTL); - /* Set the device I'm talking to */ - outb(((device & 0x7f) << 1) | 1, smbus_base + SMBXMITADD); - /* Set the command/address... */ - outb(address & 0xff, smbus_base + SMBHSTCMD); - /* Set up for a word data read */ - outb((inb(smbus_base + SMBHSTCTL) & 0xe3) | (0x3 << 2), - (smbus_base + SMBHSTCTL)); - /* Clear any lingering errors, so the transaction will run */ - outb(inb(smbus_base + SMBHSTSTAT), smbus_base + SMBHSTSTAT); - - /* Start the command */ - outb((inb(smbus_base + SMBHSTCTL) | 0x40), - smbus_base + SMBHSTCTL); - - /* Poll for transaction completion */ - if (smbus_wait_till_done(smbus_base) < 0) - return SMBUS_WAIT_UNTIL_DONE_TIMEOUT; - - global_status_register = inb(smbus_base + SMBHSTSTAT); - /* Ignore the "In Use" status... */ - if ((global_status_register & ~(3 << 5)) != (1 << 1)) - return SMBUS_ERROR; - - /* Read results of transaction */ - data = inw(smbus_base + SMBHSTDAT0); - - return data; -} - static void update_spd_len(struct spd_block *blk) { u8 i, j = 0; |