T60: Add support for Ultrabay Legacy I/O devices (40Y8122)

Those modules have basically the same Super I/O capabilities as
the Docking station. Unfortunately, the Super I/O in the module
shares the same I/O address as the Docking station, so we're not
allowed to connect the LPC Docking Bus if such a module is present.

To be able to detect this device and use it as early console for
coreboot, we have to initialize the GPIO Controller before, as
this device is detected via GPIO06.

Change-Id: If7c38bb6797f76cf28f09f3614ab9a33878571fb
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/282
Tested-by: build bot (Jenkins)

src/ec/lenovo/pmh7/Makefile.inc

@@ -1 +1,3 @@
 driver-y += pmh7.c
+smm-$(CONFIG_HAVE_SMI_HANDLER) += pmh7.c
+romstage-y += pmh7.c

src/ec/lenovo/pmh7/pmh7.c

@@ -91,6 +91,8 @@ void pmh7_register_write(int reg, int val)
 	outb(val, EC_LENOVO_PMH7_DATA);
 }
 
+#ifndef __PRE_RAM__
+#ifndef __SMM__
 static void enable_dev(device_t dev)
 {
 	struct ec_lenovo_pmh7_config *conf = dev->chip_info;
@@ -115,3 +117,5 @@ struct chip_operations ec_lenovo_pmh7_ops = {
 	CHIP_NAME("Lenovo Power Management Hardware Hub 7")
 	.enable_dev = enable_dev,
 };
+#endif
+#endif

src/mainboard/lenovo/t60/dock.c

@@ -28,8 +28,11 @@
 #include "dock.h"
 #include "superio/nsc/pc87384/pc87384.h"
 #include "ec/acpi/ec.h"
+#include "ec/lenovo/pmh7/pmh7.h"
 #include "southbridge/intel/i82801gx/i82801gx.h"
 
+#define DLPC_CONTROL 0x164c
+
 static void dlpc_write_register(int reg, int value)
 {
 	outb(reg, 0x164e);
@@ -102,12 +105,15 @@ int dlpc_init(void)
 
 	/* Select DLPC module */
 	dlpc_write_register(0x07, 0x19);
-	/* DLPC Base Address 0x164c */
-	dlpc_write_register(0x60, 0x16);
-	dlpc_write_register(0x61, 0x4c);
+	/* DLPC Base Address */
+	dlpc_write_register(0x60, (DLPC_CONTROL >> 8) & 0xff);
+	dlpc_write_register(0x61, DLPC_CONTROL & 0xff);
 	/* Activate DLPC */
 	dlpc_write_register(0x30, 0x01);
 
+	/* Reset docking state */
+	outb(0x00, DLPC_CONTROL);
+
 	dlpc_gpio_init();
 	return 0;
 }
@@ -127,7 +133,7 @@ static int dock_superio_init(void)
 	/* set GPIO pins to Serial/Parallel Port
 	 * functions
 	 */
-	dock_write_register(0x22, 0xeb);
+	dock_write_register(0x22, 0xa9);
 
 	dock_write_register(0x07, PC87384_GPIO);
 	dock_write_register(0x60, 0x16);
@@ -179,16 +185,16 @@ int dock_connect(void)
 {
 	int timeout = 1000;
 
-	outb(0x07, 0x164c);
+	outb(0x07, DLPC_CONTROL);
 
 	timeout = 1000;
 
-	while(!(inb(0x164c) & 8) && timeout--)
+	while(!(inb(DLPC_CONTROL) & 8) && timeout--)
 		udelay(1000);
 
 	if (!timeout) {
 		/* docking failed, disable DLPC switch */
-		outb(0x00, 0x164c);
+		outb(0x00, DLPC_CONTROL);
 		dlpc_write_register(0x30, 0x00);
 		return 1;
 	}
@@ -206,14 +212,25 @@ int dock_connect(void)
 void dock_disconnect(void)
 {
 	/* disconnect LPC bus */
-	outb(0x00, 0x164c);
+	outb(0x00, DLPC_CONTROL);
 	/* Assert PLTRST and DLPCPD */
 	outb(0xfc, 0x1680);
 }
 
 int dock_present(void)
 {
-	outb(0x61, 0x15ec);
-	return inb(0x15ee) & 1;
+	return pmh7_register_read(0x61) & 1;
 }
 
+int legacy_io_present(void)
+{
+	return !(inb(DEFAULT_GPIOBASE + 0x0c) & 0x40);
+}
+
+void legacy_io_init(void)
+{
+	/* Enable Power for Ultrabay slot */
+	pmh7_ultrabay_power_enable(1);
+	udelay(100000);
+	dock_superio_init();
+}

src/mainboard/lenovo/t60/dock.h

@@ -24,4 +24,7 @@ extern int dock_connect(void);
 extern void dock_disconnect(void);
 extern int dock_present(void);
 extern int dlpc_init(void);
+
+extern int legacy_io_present(void);
+extern void legacy_io_init(void);
 #endif

src/mainboard/lenovo/t60/mainboard.c

@@ -38,6 +38,7 @@
 
 static void mainboard_enable(device_t dev)
 {
+	struct southbridge_intel_i82801gx_config *config;
 	device_t dev0, idedev;
 	u8 defaults_loaded = 0;
 
@@ -50,8 +51,14 @@ static void mainboard_enable(device_t dev)
 		ec_write(0x0c, 0xc7);
 
 	idedev = dev_find_slot(0, PCI_DEVFN(0x1f,1));
-	if (idedev && idedev->chip_info && h8_ultrabay_device_present()) {
-		struct southbridge_intel_i82801gx_config *config = idedev->chip_info;
+
+	if (!(inb(DEFAULT_GPIOBASE + 0x0c) & 0x40)) {
+		/* legacy I/O connected */
+		pmh7_ultrabay_power_enable(1);
+		ec_write(0x0c, 0x84);
+	} else if (idedev && idedev->chip_info &&
+		   h8_ultrabay_device_present()) {
+		config = idedev->chip_info;
 		config->ide_enable_primary = 1;
 		pmh7_ultrabay_power_enable(1);
 		ec_write(0x0c, 0x84);

src/mainboard/lenovo/t60/mainboard_smi.c

@@ -75,7 +75,13 @@ int mainboard_io_trap_handler(int smif)
 
 	switch (smif) {
 	case SMI_DOCK_CONNECT:
-		dlpc_init();
+		/* If there's an legacy I/O module present, we're not
+		 * allowed to connect the Docking LPC Bus, as both Super I/O
+		 * chips are using 0x2e as base address.
+		 */
+		if (legacy_io_present())
+			break;
+
 		if (!dock_connect()) {
 			/* set dock LED to indicate status */
 			ec_write(0x0c, 0x08);

src/mainboard/lenovo/t60/romstage.c

@@ -210,7 +210,7 @@ static void early_ich7_init(void)
 void main(unsigned long bist)
 {
 	u32 reg32;
-	int boot_mode = 0;
+	int boot_mode = 0, dock_err;
 	const u8 spd_addrmap[2 * DIMM_SOCKETS] = { 0x50, 0x52, 0x51, 0x53 };
 
 	if (bist == 0)
@@ -223,15 +223,21 @@ void main(unsigned long bist)
 
 	ich7_enable_lpc();
 
+	/* We want early GPIO setup, to be able to detect legacy I/O module */
+	pci_write_config32(PCI_DEV(0, 0x1f, 0), GPIOBASE, DEFAULT_GPIOBASE | 1);
+	/* Enable GPIOs */
+	pci_write_config8(PCI_DEV(0, 0x1f, 0), 0x4c /* GC */ , 0x10);
+	setup_ich7_gpios();
 
-	/* dock_init initializes the DLPC switch on
-	 *  thinpad side, so this is required even
-	 *  if we're undocked.
-	 */
-	if (!dlpc_init() && dock_present()) {
+	dock_err = dlpc_init();
+
+	/* We prefer Legacy I/O module over docking */
+	if (legacy_io_present()) {
+		legacy_io_init();
+		early_superio_config();
+	} else if (!dock_err && dock_present()) {
 		dock_connect();
 		early_superio_config();
-		/* Set up the console */
 	}
 
 #if CONFIG_USBDEBUG
@@ -239,6 +245,7 @@ void main(unsigned long bist)
 	early_usbdebug_init();
 #endif
 
+	/* Setup the console */
 	console_init();
 
 	/* Halt if there was a built in self test failure */