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Diffstat (limited to 'src/southbridge/via/vt8231/early_smbus.c')
-rw-r--r--src/southbridge/via/vt8231/early_smbus.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/src/southbridge/via/vt8231/early_smbus.c b/src/southbridge/via/vt8231/early_smbus.c
deleted file mode 100644
index adbd186c87..0000000000
--- a/src/southbridge/via/vt8231/early_smbus.c
+++ /dev/null
@@ -1,295 +0,0 @@
-#define SMBUS_IO_BASE 0x5000
-
-#define SMBHSTSTAT 0x0
-#define SMBSLVSTAT 0x1
-#define SMBHSTCTL 0x2
-#define SMBHSTCMD 0x3
-#define SMBXMITADD 0x4
-#define SMBHSTDAT0 0x5
-#define SMBHSTDAT1 0x6
-#define SMBBLKDAT 0x7
-#define SMBSLVCTL 0x8
-#define SMBTRNSADD 0x9
-#define SMBSLVDATA 0xa
-#define SMLINK_PIN_CTL 0xe
-#define SMBUS_PIN_CTL 0xf
-
-/* Define register settings */
-#define HOST_RESET 0xff
-#define READ_CMD 0x01 // 1 in the 0 bit of SMBHSTADD states to READ
-
-
-#define SMBUS_TIMEOUT (100*1000*10)
-
-static void enable_smbus(void)
-{
- device_t dev;
- unsigned char c;
- /* Power management controller */
- dev = pci_locate_device(PCI_ID(0x1106, 0x8235), 0);
-
- if (dev == PCI_DEV_INVALID) {
- die("SMBUS controller not found\n");
- }
- // set IO base address to SMBUS_IO_BASE
- pci_write_config32(dev, 0x90, SMBUS_IO_BASE | 1);
-
- // Enable SMBus
- c = pci_read_config8(dev, 0xd2);
- c |= 5;
- pci_write_config8(dev, 0xd2, c);
-
- /* make it work for I/O ...
- */
- dev = pci_locate_device(PCI_ID(0x1106, 0x8231), 0);
- c = pci_read_config8(dev, 4);
- c |= 1;
- pci_write_config8(dev, 4, c);
- print_debug_hex8(c);
- print_debug(" is the comm register\n");
-
- print_debug("SMBus controller enabled\n");
-}
-
-
-static inline void smbus_delay(void)
-{
- outb(0x80, 0x80);
-}
-
-static int smbus_wait_until_active(void)
-{
- unsigned long loops;
- loops = SMBUS_TIMEOUT;
- do {
- unsigned char val;
- smbus_delay();
- val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
- if ((val & 1)) {
- break;
- }
- } while (--loops);
- return loops ? 0 : -4;
-}
-
-static int smbus_wait_until_ready(void)
-{
- unsigned long loops;
- loops = SMBUS_TIMEOUT;
- do {
- unsigned char val;
- smbus_delay();
- val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
- if ((val & 1) == 0) {
- break;
- }
- if (loops == (SMBUS_TIMEOUT / 2)) {
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
- }
- } while (--loops);
- return loops ? 0 : -2;
-}
-
-static int smbus_wait_until_done(void)
-{
- unsigned long loops;
- loops = SMBUS_TIMEOUT;
- do {
- unsigned char val;
- smbus_delay();
-
- val = inb(SMBUS_IO_BASE + SMBHSTSTAT);
- if ((val & 1) == 0) {
- break;
- }
- } while (--loops);
- return loops ? 0 : -3;
-}
-
-#if 0
-void smbus_reset(void)
-{
- outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
- outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
- outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
- outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT);
-
- smbus_wait_until_ready();
- print_debug("After reset status ");
- print_debug_hex8(inb(SMBUS_IO_BASE + SMBHSTSTAT));
- print_debug("\n");
-}
-#endif
-
-#if CONFIG_DEBUG_SMBUS
-static void smbus_print_error(unsigned char host_status_register)
-{
-
- print_err("smbus_error: ");
- print_err_hex8(host_status_register);
- print_err("\n");
- if (host_status_register & (1 << 4)) {
- print_err("Interrupt/SMI# was Failed Bus Transaction\n");
- }
- if (host_status_register & (1 << 3)) {
- print_err("Bus Error\n");
- }
- if (host_status_register & (1 << 2)) {
- print_err("Device Error\n");
- }
- if (host_status_register & (1 << 1)) {
- print_err("Interrupt/SMI# was Successful Completion\n");
- }
- if (host_status_register & (1 << 0)) {
- print_err("Host Busy\n");
- }
-}
-#endif
-
-/*
- * Copied from intel/i82801dbm early smbus code - suggested by rgm.
- * Modifications/check against i2c-viapro driver code from linux-2.4.22
- * and VT8231 Reference Docs - mw.
- */
-static int smbus_read_byte(unsigned device, unsigned address)
-{
- unsigned char global_status_register;
- unsigned char byte;
-
- if (smbus_wait_until_ready() < 0) {
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
- if (smbus_wait_until_ready() < 0) {
- return -2;
- }
- }
-
- /* setup transaction */
- /* disable interrupts */
- outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xfe, SMBUS_IO_BASE + SMBHSTCTL);
- /* set the device I'm talking too */
- outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBXMITADD);
- /* set the command/address... */
- outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
- /* set up for a byte data read */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xe3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL);
-
- /* clear any lingering errors, so the transaction will run */
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
-
- /* clear the data byte... */
- outb(0, SMBUS_IO_BASE + SMBHSTDAT0);
-
- /* start a byte read, with interrupts disabled */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL);
- /* poll for it to start */
- if (smbus_wait_until_active() < 0) {
- return -4;
- }
-
- /* poll for transaction completion */
- if (smbus_wait_until_done() < 0) {
- return -3;
- }
-
- /* Ignore the Host Busy & Command Complete ? */
- global_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT) & ~((1 << 1) | (1 << 0));
-
- /* read results of transaction */
- byte = inb(SMBUS_IO_BASE + SMBHSTDAT0);
-
- if (global_status_register != 0) {
- return -1;
- }
- return byte;
-}
-
-#if 0
-/* SMBus routines borrowed from VIA's Trident Driver */
-/* this works, so I am not going to touch it for now -- rgm */
-static unsigned char smbus_read_byte(unsigned char devAdr, unsigned char bIndex)
-{
- unsigned int i;
- unsigned char bData;
- unsigned char sts = 0;
-
- /* clear host status */
- outb(0xff, SMBUS_IO_BASE);
-
- /* check SMBUS ready */
- for (i = 0; i < SMBUS_TIMEOUT; i++)
- if ((inb(SMBUS_IO_BASE) & 0x01) == 0)
- break;
-
- /* set host command */
- outb(bIndex, SMBUS_IO_BASE + 3);
-
- /* set slave address */
- outb(devAdr | 0x01, SMBUS_IO_BASE + 4);
-
- /* start */
- outb(0x48, SMBUS_IO_BASE + 2);
-
- /* SMBUS Wait Ready */
- for (i = 0; i < SMBUS_TIMEOUT; i++)
- if (((sts = inb(SMBUS_IO_BASE)) & 0x01) == 0)
- break;
- if ((sts & ~3) != 0) {
- smbus_print_error(sts);
- return 0;
- }
- bData = inb(SMBUS_IO_BASE + 5);
-
- return bData;
-
-}
-#endif
-/* for reference, here is the fancier version which we will use at some
- * point
- */
-# if 0
-int smbus_read_byte(unsigned device, unsigned address, unsigned char *result)
-{
- unsigned char host_status_register;
- unsigned char byte;
-
- reset();
-
- smbus_wait_until_ready();
-
- /* setup transaction */
- /* disable interrupts */
- outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & (~1), SMBUS_IO_BASE + SMBHSTCTL);
- /* set the device I'm talking too */
- outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBXMITADD);
- /* set the command/address... */
- outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD);
- /* set up for a byte data read */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xE3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL);
-
- /* clear any lingering errors, so the transaction will run */
- outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
-
- /* clear the data byte... */
- outb(0, SMBUS_IO_BASE + SMBHSTDAT0);
-
- /* start the command */
- outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL);
-
- /* poll for transaction completion */
- smbus_wait_until_done();
-
- host_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT);
-
- /* Ignore the In Use Status... */
- host_status_register &= ~(1 << 6);
-
- /* read results of transaction */
- byte = inb(SMBUS_IO_BASE + SMBHSTDAT0);
- smbus_print_error(byte);
-
- *result = byte;
- return host_status_register != 0x02;
-}
-
-
-#endif
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