Add new ec subdir for Embedded Controllers and common ACPI EC support

Adds a new src/ec subdir for embedded controllers (mostly found in laptops)
and converts Getac P470 and Roda RK886EX to use the new ACPI EC instead
of having their own copies of those functions.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6304 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

18 files changed, 31 insertions, 128 deletions

diff --git a/Makefile b/Makefile
index a41efd049f..0a834c74e3 100644
--- a/Makefile
+++ b/Makefile
@@ -123,7 +123,7 @@ export MAINBOARDDIR
 PLATFORM-y += src/arch/$(ARCHDIR-y) src/cpu src/mainboard/$(MAINBOARDDIR)
 TARGETS-y :=
 
-BUILD-y := src/lib src/boot src/console src/devices src/southbridge src/northbridge src/superio src/drivers
+BUILD-y := src/lib src/boot src/console src/devices src/ec src/southbridge src/northbridge src/superio src/drivers
 BUILD-y += util/cbfstool util/sconfig
 BUILD-$(CONFIG_ARCH_X86) += src/pc80
 
diff --git a/src/Kconfig b/src/Kconfig
index 77546b0590..28915b2181 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -124,6 +124,8 @@ comment "Super I/O"
 source src/superio/Kconfig
 comment "Devices"
 source src/devices/Kconfig
+comment "Embedded Controllers"
+source src/ec/Kconfig
 
 endmenu
 
diff --git a/src/ec/Kconfig b/src/ec/Kconfig
new file mode 100644
index 0000000000..9408f6bd9e
--- /dev/null
+++ b/src/ec/Kconfig
@@ -0,0 +1 @@
+source src/ec/acpi/Kconfig
diff --git a/src/ec/Makefile.inc b/src/ec/Makefile.inc
new file mode 100644
index 0000000000..20d71ab786
--- /dev/null
+++ b/src/ec/Makefile.inc
@@ -0,0 +1 @@
+subdirs-y += acpi
diff --git a/src/ec/acpi/Kconfig b/src/ec/acpi/Kconfig
new file mode 100644
index 0000000000..642f1786c1
--- /dev/null
+++ b/src/ec/acpi/Kconfig
@@ -0,0 +1,4 @@
+config EC_ACPI
+	bool
+	help
+	ACPI Embedded Controller interface. Mostly found in laptops.
diff --git a/src/ec/acpi/Makefile.inc b/src/ec/acpi/Makefile.inc
new file mode 100644
index 0000000000..34c5136052
--- /dev/null
+++ b/src/ec/acpi/Makefile.inc
@@ -0,0 +1,2 @@
+ramstage-y += ec.c
+smm-$(CONFIG_HAVE_SMI_HANDLER) += ec.c
diff --git a/src/mainboard/roda/rk886ex/ec.c b/src/ec/acpi/ec.c
index 4c39a8419e..7a01b7e455 100644
--- a/src/mainboard/roda/rk886ex/ec.c
+++ b/src/ec/acpi/ec.c
@@ -20,6 +20,7 @@
  */
 
 #include <console/console.h>
+#include <device/device.h>
 #include <arch/io.h>
 #include <delay.h>
 #include "ec.h"
@@ -112,3 +113,6 @@ int ec_write(u8 addr, u8 data)
 	return send_ec_data(data);
 }
 
+struct chip_operations ec_acpi_ops = {
+	CHIP_NAME("ACPI Embedded Controller")
+};
diff --git a/src/mainboard/roda/rk886ex/ec.h b/src/ec/acpi/ec.h
index 49b7491696..77ee6379ea 100644
--- a/src/mainboard/roda/rk886ex/ec.h
+++ b/src/ec/acpi/ec.h
@@ -17,8 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef _MAINBOARD_EC_H
-#define _MAINBOARD_EC_H
+#ifndef _EC_ACPI_H
+#define _EC_ACPI_H
 
 #define EC_DATA	0x62
 #define EC_SC	0x66
diff --git a/src/mainboard/getac/p470/Kconfig b/src/mainboard/getac/p470/Kconfig
index f531a511a6..e4e8292349 100644
--- a/src/mainboard/getac/p470/Kconfig
+++ b/src/mainboard/getac/p470/Kconfig
@@ -27,6 +27,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select SOUTHBRIDGE_TI_PCIXX12
 	select SUPERIO_SMSC_FDC37N972
 	select SUPERIO_SMSC_SIO10N268
+	select EC_ACPI
 	select BOARD_HAS_FADT
 	select HAVE_ACPI_TABLES
 	select HAVE_PIRQ_TABLE
diff --git a/src/mainboard/getac/p470/devicetree.cb b/src/mainboard/getac/p470/devicetree.cb
index 2929cbee5b..9b376c79cf 100644
--- a/src/mainboard/getac/p470/devicetree.cb
+++ b/src/mainboard/getac/p470/devicetree.cb
@@ -135,6 +135,8 @@ chip northbridge/intel/i945
 					end
 					device pnp 4e.b off		# HWM
 					end
+					chip ec/acpi
+					end
                                 end
 
                         end
diff --git a/src/mainboard/getac/p470/ec.c b/src/mainboard/getac/p470/ec_oem.c
index 2fe44afb8a..30d41359cf 100644
--- a/src/mainboard/getac/p470/ec.c
+++ b/src/mainboard/getac/p470/ec_oem.c
@@ -22,113 +22,8 @@
 #include <console/console.h>
 #include <arch/io.h>
 #include <delay.h>
-#include "ec.h"
-
-int send_ec_command(u8 command)
-{
-	int timeout;
-
-	timeout = 0x7ff;
-	while ((inb(EC_SC) & EC_IBF) && --timeout) {
-		udelay(10);
-		if ((timeout & 0xff) == 0)
-			printk(BIOS_SPEW, ".");
-	}
-	if (!timeout) {
-		printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n", 
-				command);
-		// return -1;
-	}
-
-	outb(command, EC_SC);
-	return 0;
-}
-
-int send_ec_data(u8 data)
-{
-	int timeout;
-
-	timeout = 0x7ff;
-	while ((inb(EC_SC) & EC_IBF) && --timeout) { // wait for IBF = 0
-		udelay(10);
-		if ((timeout & 0xff) == 0)
-			printk(BIOS_SPEW, ".");
-	}
-	if (!timeout) {
-		printk(BIOS_DEBUG, "Timeout while sending data 0x%02x to EC!\n",
-				data);
-		// return -1;
-	}
-
-	outb(data, EC_DATA);
-
-	return 0;
-}
-
-int send_ec_data_nowait(u8 data)
-{
-	outb(data, EC_DATA);
-
-	return 0;
-}
-
-u8 recv_ec_data(void)
-{
-	int timeout;
-	u8 data;
-
-	timeout = 0x7fff;
-	while (--timeout) { // Wait for OBF = 1
-		if (inb(EC_SC) & EC_OBF) {
-			break;
-		}
-		udelay(10);
-		if ((timeout & 0xff) == 0)
-			printk(BIOS_SPEW, ".");
-	}
-	if (!timeout) {
-		printk(BIOS_DEBUG, "\nTimeout while receiving data from EC!\n");
-		// return -1;
-	}
-
-	data = inb(EC_DATA);
-	printk(BIOS_SPEW, "recv_ec_data: 0x%02x\n", data);
-
-	return data;
-}
-
-u8 ec_read(u8 addr)
-{
-	send_ec_command(0x80);
-	send_ec_data(addr);
-
-	return recv_ec_data();
-}
-
-int ec_write(u8 addr, u8 data)
-{
-	send_ec_command(0x81);
-	send_ec_data(addr);
-	return send_ec_data(data);
-}
-
-int ec_dump_status(void)
-{
-	u8 ec_sc = inb(EC_SC);
-	printk(BIOS_DEBUG, "Embedded Controller Status: ");
-	if (ec_sc & (1 << 6)) printk(BIOS_DEBUG, "SMI_EVT ");
-	if (ec_sc & (1 << 5)) printk(BIOS_DEBUG, "SCI_EVT ");
-	if (ec_sc & (1 << 4)) printk(BIOS_DEBUG, "BURST ");
-	if (ec_sc & (1 << 3)) printk(BIOS_DEBUG, "CMD ");
-	if (ec_sc & (1 << 1)) printk(BIOS_DEBUG, "IBF ");
-	if (ec_sc & (1 << 0)) printk(BIOS_DEBUG, "OBF ");
-	printk(BIOS_DEBUG, "\n");
-	
-	return ec_sc;
-}
-
-
-/* ********************************** */
+#include <ec/acpi/ec.h>
+#include "ec_oem.h"
 
 int send_ec_oem_command(u8 command)
 {
diff --git a/src/mainboard/getac/p470/ec.h b/src/mainboard/getac/p470/ec_oem.h
index 1fe21e5eb5..14f7484a78 100644
--- a/src/mainboard/getac/p470/ec.h
+++ b/src/mainboard/getac/p470/ec_oem.h
@@ -19,12 +19,8 @@
  * MA 02110-1301 USA
  */
 
-#ifndef _MAINBOARD_EC_H
-#define _MAINBOARD_EC_H
-
-#define EC_DATA	0x62
-#define EC_SC	0x66
-
+#ifndef _MAINBOARD_EC_OEM_H
+#define _MAINBOARD_EC_OEM_H
 
 #define EC_OEM_DATA	0x68
 #define EC_OEM_SC	0x6c
@@ -44,13 +40,6 @@
 #define   BD_EC 	0x83 // Burst Disable Embedded Controller
 #define   QR_EC 	0x84 // Query Embedded Controller
 
-int send_ec_command(u8 command);
-int send_ec_data(u8 data);
-int send_ec_data_nowait(u8 data);
-u8 recv_ec_data(void);
-u8 ec_read(u8 addr);
-int ec_write(u8 addr, u8 data);
-
 int send_ec_oem_command(u8 command);
 int send_ec_oem_data(u8 data);
 int send_ec_oem_data_nowait(u8 data);
diff --git a/src/mainboard/getac/p470/mainboard.c b/src/mainboard/getac/p470/mainboard.c
index a861f43855..8f8a39544c 100644
--- a/src/mainboard/getac/p470/mainboard.c
+++ b/src/mainboard/getac/p470/mainboard.c
@@ -28,7 +28,7 @@
 #include "chip.h"
 #include "hda_verb.h"
 
-#include "ec.c"
+#include "ec_oem.c"
 
 #define MAX_LCD_BRIGHTNESS	0xd8
 
diff --git a/src/mainboard/getac/p470/mainboard_smi.c b/src/mainboard/getac/p470/mainboard_smi.c
index 47dd3bce85..d29fe587c8 100644
--- a/src/mainboard/getac/p470/mainboard_smi.c
+++ b/src/mainboard/getac/p470/mainboard_smi.c
@@ -25,7 +25,8 @@
 #include <cpu/x86/smm.h>
 #include "southbridge/intel/i82801gx/i82801gx.h"
 #include "southbridge/intel/i82801gx/nvs.h"
-#include "ec.c"
+#include <ec/acpi/ec.h>
+#include "ec_oem.c"
 
 #define MAX_LCD_BRIGHTNESS 0xd8
 
diff --git a/src/mainboard/roda/rk886ex/Makefile.inc b/src/mainboard/roda/rk886ex/Makefile.inc
index e36824cce1..549654ad8e 100644
--- a/src/mainboard/roda/rk886ex/Makefile.inc
+++ b/src/mainboard/roda/rk886ex/Makefile.inc
@@ -18,7 +18,6 @@
 ##
 
 ramstage-y += m3885.c
-ramstage-y += ec.c
 driver-y += rtl8168.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += mainboard_smi.c
diff --git a/src/mainboard/roda/rk886ex/devicetree.cb b/src/mainboard/roda/rk886ex/devicetree.cb
index a139e25966..a713331172 100644
--- a/src/mainboard/roda/rk886ex/devicetree.cb
+++ b/src/mainboard/roda/rk886ex/devicetree.cb
@@ -106,6 +106,8 @@ chip northbridge/intel/i945
 					device pnp ff.1 on # dummy address
 					end
 				end
+				chip ec/acpi
+				end
 
                         end
 			#device pci 1f.1 off end # IDE
diff --git a/src/mainboard/roda/rk886ex/m3885.c b/src/mainboard/roda/rk886ex/m3885.c
index 5173ecfd39..29d12bca99 100644
--- a/src/mainboard/roda/rk886ex/m3885.c
+++ b/src/mainboard/roda/rk886ex/m3885.c
@@ -25,7 +25,7 @@
 #include <arch/io.h>
 #include <delay.h>
 
-#include "ec.h"
+#include <ec/acpi/ec.h>
 #include "m3885.h"
 
 #define TH0LOW	80
diff --git a/src/mainboard/roda/rk886ex/mainboard.c b/src/mainboard/roda/rk886ex/mainboard.c
index f444e0aad7..2c5b5e3d71 100644
--- a/src/mainboard/roda/rk886ex/mainboard.c
+++ b/src/mainboard/roda/rk886ex/mainboard.c
@@ -30,7 +30,7 @@
 #include <arch/coreboot_tables.h>
 #include "chip.h"
 
-#include "ec.h"
+#include <ec/acpi/ec.h>
 #include "m3885.h"
 
 #define DUMP_RUNTIME_REGISTERS 0