[LinuxBIOS] r2410 - trunk/LinuxBIOSv2/src/southbridge/amd/cs5536
svn at openbios.org
svn at openbios.org
Wed Sep 13 21:30:15 CEST 2006
Author: rminnich
Date: 2006-09-13 21:30:15 +0200 (Wed, 13 Sep 2006)
New Revision: 2410
Added:
trunk/LinuxBIOSv2/src/southbridge/amd/cs5536/cs5536_smbus2.h
Log:
add file for dcon support
signed-off-by: Jordan Crouse
Signed-off-by: Ronald G. Minnich
Added: trunk/LinuxBIOSv2/src/southbridge/amd/cs5536/cs5536_smbus2.h
===================================================================
--- trunk/LinuxBIOSv2/src/southbridge/amd/cs5536/cs5536_smbus2.h (rev 0)
+++ trunk/LinuxBIOSv2/src/southbridge/amd/cs5536/cs5536_smbus2.h 2006-09-13 19:30:15 UTC (rev 2410)
@@ -0,0 +1,299 @@
+//#include <device/smbus_def.h>
+#define SMBUS_ERROR -1
+#define SMBUS_WAIT_UNTIL_READY_TIMEOUT -2
+#define SMBUS_WAIT_UNTIL_DONE_TIMEOUT -3
+
+#define SMB_SDA 0x00
+#define SMB_STS 0x01
+#define SMB_CTRL_STS 0x02
+#define SMB_CTRL1 0x03
+#define SMB_ADD 0x04
+#define SMB_CTRL2 0x05
+#define SMB_CTRL3 0x06
+
+#define SMB_STS_SLVSTP (0x01 << 7)
+#define SMB_STS_SDAST (0x01 << 6)
+#define SMB_STS_BER (0x01 << 5)
+#define SMB_STS_NEGACK (0x01 << 4)
+#define SMB_STS_STASTR (0x01 << 3)
+#define SMB_STS_NMATCH (0x01 << 2)
+#define SMB_STS_MASTER (0x01 << 1)
+#define SMB_STS_XMIT (0x01 << 0)
+
+#define SMB_CSTS_TGSCL (0x01 << 5)
+#define SMB_CSTS_TSDA (0x01 << 4)
+#define SMB_CSTS_GCMTCH (0x01 << 3)
+#define SMB_CSTS_MATCH (0x01 << 2)
+#define SMB_CSTS_BB (0x01 << 1)
+#define SMB_CSTS_BUSY (0x01 << 0)
+
+#define SMB_CTRL1_STASTRE (0x01 << 7)
+#define SMB_CTRL1_NMINTE (0x01 << 6)
+#define SMB_CTRL1_GCMEN (0x01 << 5)
+#define SMB_CTRL1_ACK (0x01 << 4)
+#define SMB_CTRL1_RSVD (0x01 << 3)
+#define SMB_CTRL1_INTEN (0x01 << 2)
+#define SMB_CTRL1_STOP (0x01 << 1)
+#define SMB_CTRL1_START (0x01 << 0)
+
+#define SMB_ADD_SAEN (0x01 << 7)
+
+#define SMB_CTRL2_ENABLE 0x01
+
+#define SMBUS_TIMEOUT (100*1000*10)
+#define SMBUS_STATUS_MASK 0xfbff
+
+#define SMBUS_IO_BASE 0x6000
+
+static void smbus_delay(void)
+{
+ outb(0x80, 0x80);
+}
+
+static int smbus_wait(unsigned smbus_io_base) {
+ unsigned long loops = SMBUS_TIMEOUT;
+ unsigned char val;
+
+ do {
+ smbus_delay();
+ val = inb(smbus_io_base + SMB_STS);
+ if ((val & SMB_STS_SDAST) != 0)
+ break;
+ if (val & (SMB_STS_BER | SMB_STS_NEGACK)) {
+ printk_debug("SMBUS WAIT ERROR %x\n", val);
+ return SMBUS_ERROR;
+ }
+ } while(--loops);
+
+ outb(0, smbus_io_base + SMB_STS);
+ return loops ? 0 : SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+}
+
+static int smbus_write(unsigned smbus_io_base, unsigned char byte) {
+
+ outb(byte, smbus_io_base + SMB_SDA);
+ return smbus_wait(smbus_io_base);
+}
+
+/* generate a smbus start condition */
+static int smbus_start_condition(unsigned smbus_io_base)
+{
+ unsigned char val;
+
+ /* issue a START condition */
+ val = inb(smbus_io_base + SMB_CTRL1);
+ outb(val | SMB_CTRL1_START, smbus_io_base + SMB_CTRL1);
+
+ /* check for bus conflict */
+ val = inb(smbus_io_base + SMB_STS);
+ if ((val & SMB_STS_BER) != 0)
+ return SMBUS_ERROR;
+
+ return smbus_wait(smbus_io_base);
+}
+
+static int smbus_check_stop_condition(unsigned smbus_io_base)
+{
+ unsigned char val;
+ unsigned long loops;
+ loops = SMBUS_TIMEOUT;
+ /* check for SDA status */
+ do {
+ smbus_delay();
+ val = inb(smbus_io_base + SMB_CTRL1);
+ if ((val & SMB_CTRL1_STOP) == 0) {
+ break;
+ }
+ } while(--loops);
+ return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+
+ /* Make sure everything is cleared and ready to go */
+
+ val = inb(smbus_io_base + SMB_CTRL1);
+ outb(val & ~(SMB_CTRL1_STASTRE | SMB_CTRL1_NMINTE),
+ smbus_io_base + SMB_CTRL1);
+
+ outb(SMB_STS_BER | SMB_STS_NEGACK | SMB_STS_STASTR,
+ smbus_io_base + SMB_STS);
+
+ val = inb(smbus_io_base + SMB_CTRL_STS);
+ outb(val | SMB_CSTS_BB, smbus_io_base + SMB_CTRL_STS);
+}
+
+static int smbus_stop_condition(unsigned smbus_io_base)
+{
+ unsigned char val;
+ val = inb(smbus_io_base + SMB_CTRL1);
+ outb(SMB_CTRL1_STOP, smbus_io_base + SMB_CTRL1);
+
+ return 0;
+}
+
+static int smbus_ack(unsigned smbus_io_base, int state)
+{
+ unsigned char val = inb(smbus_io_base + SMB_CTRL1);
+
+ if (state)
+ outb(val | SMB_CTRL1_ACK, smbus_io_base + SMB_CTRL1);
+ else
+ outb(val & ~SMB_CTRL1_ACK, smbus_io_base + SMB_CTRL1);
+
+ return 0;
+}
+
+static int smbus_send_slave_address(unsigned smbus_io_base, unsigned char device)
+{
+ unsigned char val;
+
+ /* send the slave address */
+ outb(device, smbus_io_base + SMB_SDA);
+
+ /* check for bus conflict and NACK */
+ val = inb(smbus_io_base + SMB_STS);
+ if (((val & SMB_STS_BER) != 0) ||
+ ((val & SMB_STS_NEGACK) != 0)) {
+ printk_debug("SEND SLAVE ERROR (%x)\n", val);
+ return SMBUS_ERROR;
+ }
+ return smbus_wait(smbus_io_base);
+}
+
+static int smbus_send_command(unsigned smbus_io_base, unsigned char command)
+{
+ unsigned char val;
+
+ /* send the command */
+ outb(command, smbus_io_base + SMB_SDA);
+
+ /* check for bus conflict and NACK */
+ val = inb(smbus_io_base + SMB_STS);
+ if (((val & SMB_STS_BER) != 0) ||
+ ((val & SMB_STS_NEGACK) != 0))
+ return SMBUS_ERROR;
+
+ return smbus_wait(smbus_io_base);
+}
+
+static void _doread(unsigned smbus_io_base, unsigned char device,
+ unsigned char address, unsigned char *data, int count)
+{
+ int ret;
+ int index = 0;
+ unsigned char val;
+
+ if ((ret = smbus_check_stop_condition(smbus_io_base)))
+ goto err;
+
+ index++;
+
+ if ((ret = smbus_start_condition(smbus_io_base)))
+ goto err;
+
+ index++; /* 2 */
+ if ((ret = smbus_send_slave_address(smbus_io_base, device)))
+ goto err;
+
+ index++;
+ if ((ret = smbus_send_command(smbus_io_base, address)))
+ goto err;
+
+ index++;
+ if ((ret = smbus_start_condition(smbus_io_base)))
+ goto err;
+
+ /* Clear the ack for multiple byte reads */
+ smbus_ack(smbus_io_base, (count == 1) ? 1 : 0);
+
+ index++;
+ if ((ret = smbus_send_slave_address(smbus_io_base, device | 0x01)))
+ goto err;
+
+ while(count) {
+ /* Set the ACK if this is the next to last byte */
+ smbus_ack(smbus_io_base, (count == 2) ? 1 : 0);
+
+ /* Set the stop bit if this is the last byte to read */
+
+ if (count == 1)
+ smbus_stop_condition(smbus_io_base);
+
+ val = inb(smbus_io_base + SMB_SDA);
+ *data++ = val;
+
+ if (count > 1) {
+ int ret = smbus_wait(smbus_io_base);
+ if (ret)
+ return ret;
+ }
+
+ count--;
+ }
+
+ return;
+
+ err:
+ printk_debug("SMBUS READ ERROR (%d): %d\n", index, ret);
+}
+
+static unsigned char do_smbus_read_byte(unsigned smbus_io_base,
+ unsigned char device,
+ unsigned char address)
+{
+ unsigned char val = 0;
+ _doread(smbus_io_base, device, address, &val, sizeof(val));
+ return val;
+}
+
+static unsigned short do_smbus_read_word(unsigned smbus_io_base,
+ unsigned char device, unsigned char address)
+{
+ unsigned short val = 0;
+ _doread(smbus_io_base, device, address, (unsigned char *) &val,
+ sizeof(val));
+ return val;
+}
+
+static int _dowrite(unsigned smbus_io_base, unsigned char device,
+ unsigned char address, unsigned char *data, int count) {
+
+ int ret;
+
+ if ((ret = smbus_check_stop_condition(smbus_io_base)))
+ goto err;
+
+ if ((ret = smbus_start_condition(smbus_io_base)))
+ goto err;
+
+ if ((ret = smbus_send_slave_address(smbus_io_base, device)))
+ goto err;
+
+ if ((ret = smbus_send_command(smbus_io_base, address)))
+ goto err;
+
+ while(count) {
+ if ((ret = smbus_write(smbus_io_base, *data++)))
+ goto err;
+ count--;
+ }
+
+ smbus_stop_condition(smbus_io_base);
+ return 0;
+
+ err:
+ printk_debug("SMBUS WRITE ERROR: %d\n", ret);
+ return -1;
+}
+
+
+static int do_smbus_write_byte(unsigned smbus_io_base, unsigned char device,
+ unsigned char address, unsigned char data)
+{
+ return _dowrite(smbus_io_base, device, address,
+ (unsigned char *) &data, 1);
+}
+
+static int do_smbus_write_word(unsigned smbus_io_base, unsigned char device, unsigned char address,
+ unsigned short data)
+{
+ return _dowrite(smbus_io_base, device ,address, (unsigned char *) &data, 2);
+}
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