ibexpeak / bd82x6x: Make SATA mode user-visible option.

Ability to choose compatibility mode is interesting for testing payloads and
OS for compatibility with older systems.

As per comments
"ide_legacy_combined # TODO: Does nothing since
		      generations, remove from sb code?"
The "combined" mode was removed. It wasn't used by any mobo and the code for
it is almost identical to IDE one other than few bits relating to interrupt
handling and ISA mode.

Change-Id: I407a8fac753b513812a86bef5abcf39c6d81472e
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4658
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/google/butterfly/cmos.layout b/src/mainboard/google/butterfly/cmos.layout
index 05de624..ee5ee25 100644
--- a/src/mainboard/google/butterfly/cmos.layout
+++ b/src/mainboard/google/butterfly/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -132,6 +133,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/google/butterfly/devicetree.cb b/src/mainboard/google/butterfly/devicetree.cb
index e7a50c0..9a7a1d5 100644
--- a/src/mainboard/google/butterfly/devicetree.cb
+++ b/src/mainboard/google/butterfly/devicetree.cb
@@ -56,8 +56,6 @@
 			#register "gpi1_routing" = "1"	#SMI from EC
 			register "gpi13_routing" = "2"	#SCI from EC
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			# Enable SATA ports 0 & 1
 			register "sata_port_map" = "0x3"
 			# Set max SATA speed to 3.0 Gb/s
diff --git a/src/mainboard/google/link/cmos.layout b/src/mainboard/google/link/cmos.layout
index afdd3c6..b7320b5 100644
--- a/src/mainboard/google/link/cmos.layout
+++ b/src/mainboard/google/link/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/google/link/devicetree.cb b/src/mainboard/google/link/devicetree.cb
index 15f420d..8f0ed3c 100644
--- a/src/mainboard/google/link/devicetree.cb
+++ b/src/mainboard/google/link/devicetree.cb
@@ -59,8 +59,6 @@
 			register "gpi7_routing" = "2"
 			register "gpi8_routing" = "1"
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x1"
 
 			register "sata_port0_gen3_tx" = "0x00880a7f"
diff --git a/src/mainboard/google/parrot/cmos.layout b/src/mainboard/google/parrot/cmos.layout
index afdd3c6..b7320b5 100644
--- a/src/mainboard/google/parrot/cmos.layout
+++ b/src/mainboard/google/parrot/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/google/parrot/devicetree.cb b/src/mainboard/google/parrot/devicetree.cb
index cd65fbf..59586cc 100644
--- a/src/mainboard/google/parrot/devicetree.cb
+++ b/src/mainboard/google/parrot/devicetree.cb
@@ -61,8 +61,6 @@
 			register "gpi8_routing" = "1"
 			register "gpi15_routing" = "1" #lid switch gpe
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x1"
 
 			# EC range is 0xFD60 (EC_IO) and 0x68/0x6C
diff --git a/src/mainboard/google/stout/cmos.layout b/src/mainboard/google/stout/cmos.layout
index afdd3c6..b7320b5 100644
--- a/src/mainboard/google/stout/cmos.layout
+++ b/src/mainboard/google/stout/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/google/stout/devicetree.cb b/src/mainboard/google/stout/devicetree.cb
index 6e02020..653d3fe 100644
--- a/src/mainboard/google/stout/devicetree.cb
+++ b/src/mainboard/google/stout/devicetree.cb
@@ -57,8 +57,6 @@
 			register "gpi1_routing" = "1"
 			register "gpi6_routing" = "2"
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x3"
 			# Set max SATA speed to 3.0 Gb/s
 			register "sata_interface_speed_support" = "0x2"
diff --git a/src/mainboard/intel/cougar_canyon2/cmos.layout b/src/mainboard/intel/cougar_canyon2/cmos.layout
index afdd3c6..b7320b5 100644
--- a/src/mainboard/intel/cougar_canyon2/cmos.layout
+++ b/src/mainboard/intel/cougar_canyon2/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/intel/cougar_canyon2/devicetree.cb b/src/mainboard/intel/cougar_canyon2/devicetree.cb
index e66574e..c499a56 100644
--- a/src/mainboard/intel/cougar_canyon2/devicetree.cb
+++ b/src/mainboard/intel/cougar_canyon2/devicetree.cb
@@ -41,8 +41,6 @@
 			register "pirqg_routing" = "0x80"
 			register "pirqh_routing" = "0x80"
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x3f"
 
 			device pci 14.0 on end # XHCI
diff --git a/src/mainboard/intel/emeraldlake2/cmos.layout b/src/mainboard/intel/emeraldlake2/cmos.layout
index afdd3c6..b7320b5 100644
--- a/src/mainboard/intel/emeraldlake2/cmos.layout
+++ b/src/mainboard/intel/emeraldlake2/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/intel/emeraldlake2/devicetree.cb b/src/mainboard/intel/emeraldlake2/devicetree.cb
index 0bb42d6..0d81502 100644
--- a/src/mainboard/intel/emeraldlake2/devicetree.cb
+++ b/src/mainboard/intel/emeraldlake2/devicetree.cb
@@ -50,8 +50,6 @@
 			register "alt_gp_smi_en" = "0x0002"
 			register "gpe0_en" = "0x4000"
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x3f"
 
 			# SuperIO range is 0x700-0x73f
diff --git a/src/mainboard/kontron/ktqm77/cmos.layout b/src/mainboard/kontron/ktqm77/cmos.layout
index 47cd60f..dc6a44b 100644
--- a/src/mainboard/kontron/ktqm77/cmos.layout
+++ b/src/mainboard/kontron/ktqm77/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       11       sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: additional mainboard options
 416          4       e      10        systemp_type
@@ -162,6 +163,8 @@
 10    2     LM75@90
 10    3     GPIO16
 10    4     LM75@9e
+11    0     AHCI
+11    1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/kontron/ktqm77/devicetree.cb b/src/mainboard/kontron/ktqm77/devicetree.cb
index 65c03c4..f6390ac 100644
--- a/src/mainboard/kontron/ktqm77/devicetree.cb
+++ b/src/mainboard/kontron/ktqm77/devicetree.cb
@@ -36,8 +36,6 @@
 			register "pirqg_routing" = "0x8b"
 			register "pirqh_routing" = "0x8b"
 
-			register "ide_legacy_combined" = "0x0" # TODO: Does nothing since generations, remove from sb code?
-			register "sata_ahci" = "0x1"
 			# Enable all SATA ports 0-5
 			register "sata_port_map" = "0x3f"
 			# Set max SATA speed to 6.0 Gb/s (should be the default, anyway)
diff --git a/src/mainboard/lenovo/x201/cmos.default b/src/mainboard/lenovo/x201/cmos.default
index 772b024..a8576d8 100644
--- a/src/mainboard/lenovo/x201/cmos.default
+++ b/src/mainboard/lenovo/x201/cmos.default
@@ -11,3 +11,4 @@
 touchpad=Enable
 fn_ctrl_swap=Disable
 sticky_fn=Disable
+sata_mode=AHCI
diff --git a/src/mainboard/lenovo/x201/cmos.layout b/src/mainboard/lenovo/x201/cmos.layout
index ba6f87d..984d903 100644
--- a/src/mainboard/lenovo/x201/cmos.layout
+++ b/src/mainboard/lenovo/x201/cmos.layout
@@ -92,7 +92,8 @@
 414         1       e       1        touchpad
 417         1       e       1        fn_ctrl_swap
 418         1       e       1        sticky_fn
-#419        565     r       0        unused
+421         1       e       9        sata_mode
+#422        562     r       0        unused
 
 # coreboot config options: check sums
 984         16       h       0        check_sum
@@ -131,6 +132,8 @@
 7     2     Keep
 8     0     Secondary
 8     1     Primary
+9     0     AHCI
+9     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/lenovo/x201/devicetree.cb b/src/mainboard/lenovo/x201/devicetree.cb
index c06056b..83595e1 100644
--- a/src/mainboard/lenovo/x201/devicetree.cb
+++ b/src/mainboard/lenovo/x201/devicetree.cb
@@ -106,7 +106,6 @@
 			register "gpi1_routing" = "2"
 			register "gpi13_routing" = "2"
 
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x33"
 
 			register "gpe0_en" = "0x20022046"
diff --git a/src/mainboard/samsung/lumpy/cmos.layout b/src/mainboard/samsung/lumpy/cmos.layout
index 9552021..208e8ee 100644
--- a/src/mainboard/samsung/lumpy/cmos.layout
+++ b/src/mainboard/samsung/lumpy/cmos.layout
@@ -85,7 +85,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 #409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/samsung/lumpy/devicetree.cb b/src/mainboard/samsung/lumpy/devicetree.cb
index cdd7a5c..69729d7 100644
--- a/src/mainboard/samsung/lumpy/devicetree.cb
+++ b/src/mainboard/samsung/lumpy/devicetree.cb
@@ -59,8 +59,6 @@
 			register "gpi1_routing" = "1"
 			register "gpi7_routing" = "2"
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x1"
 
 			# EC range is 0xa00-0xa3f
diff --git a/src/mainboard/samsung/stumpy/cmos.layout b/src/mainboard/samsung/stumpy/cmos.layout
index 6d2ac458..ec393a5 100644
--- a/src/mainboard/samsung/stumpy/cmos.layout
+++ b/src/mainboard/samsung/stumpy/cmos.layout
@@ -84,7 +84,8 @@
 # coreboot config options: southbridge
 408          1       e       1        nmi
 409          2       e       7        power_on_after_fail
-#411          5       r       0        unused
+411          1       e       8        sata_mode
+#412          4       r       0        unused
 
 # coreboot config options: bootloader
 #Used by ChromeOS:
@@ -131,6 +132,8 @@
 7     0     Disable
 7     1     Enable
 7     2     Keep
+8     0     AHCI
+8     1     Compatible
 # -----------------------------------------------------------------
 checksums
 
diff --git a/src/mainboard/samsung/stumpy/devicetree.cb b/src/mainboard/samsung/stumpy/devicetree.cb
index ee01e8a..ab03c79 100644
--- a/src/mainboard/samsung/stumpy/devicetree.cb
+++ b/src/mainboard/samsung/stumpy/devicetree.cb
@@ -49,8 +49,6 @@
 			register "gpi1_routing" = "0"
 			register "gpi14_routing" = "2"
 
-			register "ide_legacy_combined" = "0x0"
-			register "sata_ahci" = "0x1"
 			register "sata_port_map" = "0x3"
 
 			# SuperIO range is 0x700-0x73f
diff --git a/src/southbridge/intel/bd82x6x/chip.h b/src/southbridge/intel/bd82x6x/chip.h
index 828466c..0f2f0e9 100644
--- a/src/southbridge/intel/bd82x6x/chip.h
+++ b/src/southbridge/intel/bd82x6x/chip.h
@@ -64,8 +64,6 @@
 	uint16_t alt_gp_smi_en;
 
 	/* IDE configuration */
-	uint32_t ide_legacy_combined;
-	uint32_t sata_ahci;
 	uint8_t sata_port_map;
 	uint32_t sata_port0_gen3_tx;
 	uint32_t sata_port1_gen3_tx;
diff --git a/src/southbridge/intel/bd82x6x/sata.c b/src/southbridge/intel/bd82x6x/sata.c
index 594b09d..133ebee 100644
--- a/src/southbridge/intel/bd82x6x/sata.c
+++ b/src/southbridge/intel/bd82x6x/sata.c
@@ -24,6 +24,7 @@
 #include <device/pci.h>
 #include <device/pci_ids.h>
 #include "pch.h"
+#include <pc80/mc146818rtc.h>
 
 typedef struct southbridge_intel_bd82x6x_config config_t;
 
@@ -45,6 +46,7 @@
 	u16 reg16;
 	/* Get the chip configuration */
 	config_t *config = dev->chip_info;
+	u8 sata_mode;
 
 	printk(BIOS_DEBUG, "SATA: Initializing...\n");
 
@@ -53,48 +55,17 @@
 		return;
 	}
 
+	if (get_option(&sata_mode, "sata_mode") != CB_SUCCESS)
+		/* Default to AHCI */
+		sata_mode = 0;
+
 	/* SATA configuration */
 
 	/* Enable BARs */
 	pci_write_config16(dev, PCI_COMMAND, 0x0007);
 
-	if (config->ide_legacy_combined) {
-		printk(BIOS_DEBUG, "SATA: Controller in combined mode.\n");
-
-		/* No AHCI: clear AHCI base */
-		pci_write_config32(dev, 0x24, 0x00000000);
-		/* And without AHCI BAR no memory decoding */
-		reg16 = pci_read_config16(dev, PCI_COMMAND);
-		reg16 &= ~PCI_COMMAND_MEMORY;
-		pci_write_config16(dev, PCI_COMMAND, reg16);
-
-		pci_write_config8(dev, 0x09, 0x80);
-
-		/* Set timings */
-		pci_write_config16(dev, IDE_TIM_PRI, IDE_DECODE_ENABLE |
-				IDE_ISP_5_CLOCKS | IDE_RCT_4_CLOCKS);
-		pci_write_config16(dev, IDE_TIM_SEC, IDE_DECODE_ENABLE |
-				IDE_ISP_3_CLOCKS | IDE_RCT_1_CLOCKS |
-				IDE_PPE0 | IDE_IE0 | IDE_TIME0);
-
-		/* Sync DMA */
-		pci_write_config16(dev, IDE_SDMA_CNT, IDE_SSDE0);
-		pci_write_config16(dev, IDE_SDMA_TIM, 0x0200);
-
-		/* Set IDE I/O Configuration */
-		reg32 = SIG_MODE_PRI_NORMAL | FAST_PCB1 | FAST_PCB0 | PCB1 | PCB0;
-		pci_write_config32(dev, IDE_CONFIG, reg32);
-
-		/* Port enable */
-		reg16 = pci_read_config16(dev, 0x92);
-		reg16 &= ~0x3f;
-		reg16 |= config->sata_port_map;
-		pci_write_config16(dev, 0x92, reg16);
-
-		/* SATA Initialization register */
-		pci_write_config32(dev, 0x94,
-			   ((config->sata_port_map ^ 0x3f) << 24) | 0x183);
-	} else if(config->sata_ahci) {
+	/* AHCI */
+	if (sata_mode == 0) {
 		u32 abar;
 
 		printk(BIOS_DEBUG, "SATA: Controller in AHCI mode.\n");
@@ -156,6 +127,7 @@
 		reg32 &= ~0x00000005;
 		write32(abar + 0xa0, reg32);
 	} else {
+	        /* IDE */
 		printk(BIOS_DEBUG, "SATA: Controller in plain mode.\n");
 
 		/* No AHCI: clear AHCI base */
@@ -244,15 +216,19 @@
 	/* Get the chip configuration */
 	config_t *config = dev->chip_info;
 	u16 map = 0;
+	u8 sata_mode;
 
 	if (!config)
 		return;
 
+	if (get_option(&sata_mode, "sata_mode") != CB_SUCCESS)
+		sata_mode = 0;
+
 	/*
 	 * Set SATA controller mode early so the resource allocator can
 	 * properly assign IO/Memory resources for the controller.
 	 */
-	if (config->sata_ahci)
+	if (sata_mode == 0)
 		map = 0x0060;
 
 	map |= (config->sata_port_map ^ 0x3f) << 8;
diff --git a/src/southbridge/intel/ibexpeak/sata.c b/src/southbridge/intel/ibexpeak/sata.c
index d30fae2..078dc8e 100644
--- a/src/southbridge/intel/ibexpeak/sata.c
+++ b/src/southbridge/intel/ibexpeak/sata.c
@@ -25,6 +25,7 @@
 #include <device/pci.h>
 #include <device/pci_ids.h>
 #include "pch.h"
+#include <pc80/mc146818rtc.h>
 
 typedef struct southbridge_intel_ibexpeak_config config_t;
 
@@ -46,6 +47,7 @@
 	u16 reg16;
 	/* Get the chip configuration */
 	config_t *config = dev->chip_info;
+	u8 sata_mode;
 
 	printk(BIOS_DEBUG, "SATA: Initializing...\n");
 
@@ -54,48 +56,17 @@
 		return;
 	}
 
+	if (get_option(&sata_mode, "sata_mode") != CB_SUCCESS)
+		/* Default to AHCI */
+		sata_mode = 0;
+
 	/* SATA configuration */
 
 	/* Enable BARs */
 	pci_write_config16(dev, PCI_COMMAND, 0x0007);
 
-	if (config->ide_legacy_combined) {
-		printk(BIOS_DEBUG, "SATA: Controller in combined mode.\n");
-
-		/* No AHCI: clear AHCI base */
-		pci_write_config32(dev, 0x24, 0x00000000);
-		/* And without AHCI BAR no memory decoding */
-		reg16 = pci_read_config16(dev, PCI_COMMAND);
-		reg16 &= ~PCI_COMMAND_MEMORY;
-		pci_write_config16(dev, PCI_COMMAND, reg16);
-
-		pci_write_config8(dev, 0x09, 0x80);
-
-		/* Set timings */
-		pci_write_config16(dev, IDE_TIM_PRI, IDE_DECODE_ENABLE |
-				   IDE_ISP_5_CLOCKS | IDE_RCT_4_CLOCKS);
-		pci_write_config16(dev, IDE_TIM_SEC, IDE_DECODE_ENABLE |
-				   IDE_ISP_5_CLOCKS | IDE_RCT_4_CLOCKS);
-
-		/* Sync DMA */
-		pci_write_config16(dev, IDE_SDMA_CNT, 0);
-		pci_write_config16(dev, IDE_SDMA_TIM, 0);
-
-		/* Set IDE I/O Configuration */
-		reg32 = SIG_MODE_PRI_NORMAL | FAST_PCB1 | FAST_PCB0 | PCB1 | PCB0;
-		pci_write_config32(dev, IDE_CONFIG, reg32);
-
-		/* Port enable */
-		reg16 = pci_read_config16(dev, 0x92);
-		reg16 &= ~0x3f;
-		reg16 |= config->sata_port_map;
-		pci_write_config16(dev, 0x92, reg16);
-
-		/* SATA Initialization register */
-		pci_write_config32(dev, 0x94,
-				   ((config->
-				     sata_port_map ^ 0x3f) << 24) | 0x183);
-	} else if (config->sata_ahci) {
+	if (sata_mode == 0) {
+		/* AHCI */
 		u32 abar;
 
 		printk(BIOS_DEBUG, "SATA: Controller in AHCI mode.\n");
@@ -158,6 +129,7 @@
 		reg32 &= ~0x00000005;
 		write32(abar + 0xa0, reg32);
 	} else {
+                /* IDE */
 		printk(BIOS_DEBUG, "SATA: Controller in plain mode.\n");
 
 		/* No AHCI: clear AHCI base */
@@ -245,15 +217,19 @@
 	/* Get the chip configuration */
 	config_t *config = dev->chip_info;
 	u16 map = 0;
+	u8 sata_mode;
 
 	if (!config)
 		return;
 
+	if (get_option(&sata_mode, "sata_mode") != CB_SUCCESS)
+		sata_mode = 0;
+
 	/*
 	 * Set SATA controller mode early so the resource allocator can
 	 * properly assign IO/Memory resources for the controller.
 	 */
-	if (config->sata_ahci)
+	if (sata_mode == 0)
 		map = 0x0060;
 
 	map |= (config->sata_port_map ^ 0x3f) << 8;