X60: fix docking

Fix ordering of power/reset/undock procedure to prevent
crashes seen with the old code. Also call dlpc_init()
only once.

Change-Id: I27d1f42e845fcccde40e6ca5af4a7762edab5d36
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/597
Tested-by: build bot (Jenkins)

src/mainboard/lenovo/x60/dock.c

@@ -107,6 +107,15 @@ int dlpc_init(void)
 	/* Activate DLPC */
 	dlpc_write_register(0x30, 0x01);
 
+	dlpc_gpio_init();
+
+	return 0;
+}
+
+int dock_connect(void)
+{
+	int timeout = 1000;
+
 	outb(0x07, 0x164c);
 
 	timeout = 1000;
@@ -121,26 +130,18 @@ int dlpc_init(void)
 		return 1;
 	}
 
-	dlpc_gpio_init();
-
-	return 0;
-}
-
-int dock_connect(void)
-{
-	int timeout = 1000;
-
 	/* Assert D_PLTRST# */
 	outb(0xfe, 0x1680);
 	udelay(100000);
 	/* Deassert D_PLTRST# */
 	outb(0xff, 0x1680);
 
-	udelay(1000);
+	udelay(100000);
 
 	/* startup 14.318MHz Clock */
 	dock_write_register(0x29, 0x06);
 	/* wait until clock is settled */
+	timeout = 1000;
 	while(!(dock_read_register(0x29) & 0x08) && timeout--)
 		udelay(1000);
 
@@ -243,12 +244,20 @@ int dock_connect(void)
 
 void dock_disconnect(void)
 {
-	/* disable Ultrabay and USB Power */
+	printk(BIOS_DEBUG, "%s enter\n", __func__);
-	outb(0x00, 0x1628);
 	/* disconnect LPC bus */
 	outb(0x00, 0x164c);
+	udelay(10000);
+
 	/* Assert PLTRST and DLPCPD */
 	outb(0xfc, 0x1680);
+	udelay(10000);
+
+	/* disable Ultrabay and USB Power */
+	outb(0x00, 0x1628);
+	udelay(10000);
+
+	printk(BIOS_DEBUG, "%s finish\n", __func__);
 }
 
 int dock_present(void)

src/mainboard/lenovo/x60/mainboard_smi.c

@@ -28,6 +28,7 @@
 #include <ec/acpi/ec.h>
 #include <pc80/mc146818rtc.h>
 #include <ec/lenovo/h8/h8.h>
+#include <delay.h>
 #include "dock.h"
 #include "smi.h"
 
@@ -72,8 +73,8 @@ int mainboard_io_trap_handler(int smif)
 	switch (smif) {
 	case SMI_DOCK_CONNECT:
 		ec_clr_bit(0x03, 2);
-		dlpc_init();
+		udelay(250000);
-		if (!dlpc_init() && !dock_connect()) {
+		if (!dock_connect()) {
 			ec_set_bit(0x03, 2);
 			/* set dock LED to indicate status */
 			ec_write(0x0c, 0x09);

src/mainboard/lenovo/x60/romstage.c

@@ -229,12 +229,12 @@ void main(unsigned long bist)
 
 	ich7_enable_lpc();
 
-
+	dlpc_init();
 	/* dock_init initializes the DLPC switch on
 	 *  thinpad side, so this is required even
 	 *  if we're undocked.
 	 */
-	if (!dlpc_init() && dock_present()) {
+	if (dock_present()) {
 		dock_connect();
 		early_superio_config();
 		/* Set up the console */