haswell: more ULT/LP support and minor tweaks

- Add ME device ID for Lynxpoint LP
- Add GPU device IDs for ULT
- SATA init tweaks from checking against DXE reference code
- Remove the ICH7 from the SPI driver so it works on all lynxpoint
without having to add more LPC device ID checks
- Add function disable for audio dsp and xhci, remove PCI bridge
- Add interrupt route registers for new devices (needs romstage setup)

Change-Id: Idb48f50d0bacb6bf90531c3834542b9abb54fb8a
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/2680
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

5 files changed, 67 insertions, 108 deletions

diff --git a/src/southbridge/intel/lynxpoint/me_9.x.c b/src/southbridge/intel/lynxpoint/me_9.x.c
index f2e928a691..63b520531b 100644
--- a/src/southbridge/intel/lynxpoint/me_9.x.c
+++ b/src/southbridge/intel/lynxpoint/me_9.x.c
@@ -754,10 +754,16 @@ static struct device_operations device_ops = {
 	.ops_pci		= &pci_ops,
 };
 
+static const unsigned short pci_device_ids[] = {
+	0x8c3a, /* Mobile */
+	0x9c3a, /* Low Power */
+	0
+};
+
 static const struct pci_driver intel_me __pci_driver = {
 	.ops	= &device_ops,
 	.vendor	= PCI_VENDOR_ID_INTEL,
-	.device	= 0x8c3a,
+	.devices= pci_device_ids,
 };
 
 /******************************************************************************
diff --git a/src/southbridge/intel/lynxpoint/pch.c b/src/southbridge/intel/lynxpoint/pch.c
index c2765e91eb..1fb49158ee 100644
--- a/src/southbridge/intel/lynxpoint/pch.c
+++ b/src/southbridge/intel/lynxpoint/pch.c
@@ -55,6 +55,12 @@ int pch_silicon_supported(int type, int rev)
 static void pch_hide_devfn(unsigned devfn)
 {
 	switch (devfn) {
+	case PCI_DEVFN(19, 0): /* Audio DSP */
+		RCBA32_OR(FD, PCH_DISABLE_ADSPD);
+		break;
+	case PCI_DEVFN(20, 0): /* XHCI */
+		RCBA32_OR(FD, PCH_DISABLE_XHCI);
+		break;
 	case PCI_DEVFN(22, 0): /* MEI #1 */
 		RCBA32_OR(FD2, PCH_DISABLE_MEI1);
 		break;
@@ -89,9 +95,6 @@ static void pch_hide_devfn(unsigned devfn)
 	case PCI_DEVFN(29, 0): /* EHCI #1 */
 		RCBA32_OR(FD, PCH_DISABLE_EHCI1);
 		break;
-	case PCI_DEVFN(30, 0): /* PCI-to-PCI Bridge */
-		RCBA32_OR(FD, PCH_DISABLE_P2P);
-		break;
 	case PCI_DEVFN(31, 0): /* LPC */
 		RCBA32_OR(FD, PCH_DISABLE_LPC);
 		break;
@@ -101,7 +104,7 @@ static void pch_hide_devfn(unsigned devfn)
 	case PCI_DEVFN(31, 3): /* SMBUS */
 		RCBA32_OR(FD, PCH_DISABLE_SMBUS);
 		break;
-	case PCI_DEVFN(31, 5): /* SATA #22 */
+	case PCI_DEVFN(31, 5): /* SATA #2 */
 		RCBA32_OR(FD, PCH_DISABLE_SATA2);
 		break;
 	case PCI_DEVFN(31, 6): /* Thermal Subsystem */
diff --git a/src/southbridge/intel/lynxpoint/pch.h b/src/southbridge/intel/lynxpoint/pch.h
index f6707f7bdb..5a3725ef29 100644
--- a/src/southbridge/intel/lynxpoint/pch.h
+++ b/src/southbridge/intel/lynxpoint/pch.h
@@ -407,6 +407,8 @@ unsigned get_gpios(const int *gpio_num_array);
 #define D22IP_IDERIP	8	/* IDE-R Pin */
 #define D22IP_MEI2IP	4	/* MEI #2 Pin */
 #define D22IP_MEI1IP	0	/* MEI #1 Pin */
+#define D20IP		0x3128	/* 32bit */
+#define D20IP_XHCI	0	/* XHCI Pin */
 #define D31IR		0x3140	/* 16bit */
 #define D30IR		0x3142	/* 16bit */
 #define D29IR		0x3144	/* 16bit */
@@ -414,7 +416,11 @@ unsigned get_gpios(const int *gpio_num_array);
 #define D27IR		0x3148	/* 16bit */
 #define D26IR		0x314c	/* 16bit */
 #define D25IR		0x3150	/* 16bit */
+#define D23IR		0x3158	/* 16bit */
 #define D22IR		0x315c	/* 16bit */
+#define D20IR		0x3160	/* 16bit */
+#define D21IR		0x3164	/* 16bit */
+#define D19IR		0x3168	/* 16bit */
 #define OIC		0x31fe	/* 16bit */
 #define SOFT_RESET_CTRL 0x38f4
 #define SOFT_RESET_DATA 0x38f8
@@ -434,8 +440,8 @@ unsigned get_gpios(const int *gpio_num_array);
 #define CG		0x341c	/* 32bit */
 
 /* Function Disable 1 RCBA 0x3418 */
-#define PCH_DISABLE_ALWAYS	((1 << 0)|(1 << 26)|(1 << 27))
-#define PCH_DISABLE_P2P		(1 << 1)
+#define PCH_DISABLE_ALWAYS	(1 << 0)
+#define PCH_DISABLE_ADSPD	(1 << 1)
 #define PCH_DISABLE_SATA1	(1 << 2)
 #define PCH_DISABLE_SMBUS	(1 << 3)
 #define PCH_DISABLE_HD_AUDIO	(1 << 4)
@@ -445,6 +451,7 @@ unsigned get_gpios(const int *gpio_num_array);
 #define PCH_DISABLE_PCIE(x)	(1 << (16 + x))
 #define PCH_DISABLE_THERMAL	(1 << 24)
 #define PCH_DISABLE_SATA2	(1 << 25)
+#define PCH_DISABLE_XHCI	(1 << 27)
 
 /* Function Disable 2 RCBA 0x3428 */
 #define PCH_DISABLE_KT		(1 << 4)
diff --git a/src/southbridge/intel/lynxpoint/sata.c b/src/southbridge/intel/lynxpoint/sata.c
index 81d4a1d996..25eb94fed6 100644
--- a/src/southbridge/intel/lynxpoint/sata.c
+++ b/src/southbridge/intel/lynxpoint/sata.c
@@ -23,6 +23,7 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <device/pci_ids.h>
+#include <delay.h>
 #include "pch.h"
 
 typedef struct southbridge_intel_lynxpoint_config config_t;
@@ -123,6 +124,7 @@ static void sata_init(struct device *dev)
 		reg16 &= ~0x3f;
 		reg16 |= 0x8000 | config->sata_port_map;
 		pci_write_config16(dev, 0x92, reg16);
+		udelay(2);
 
 		/* Setup register 98h */
 		reg32 = pci_read_config16(dev, 0x98);
@@ -138,6 +140,7 @@ static void sata_init(struct device *dev)
 #if CONFIG_INTEL_LYNXPOINT_LP
 		reg32 &= ~((1 << 31) | (1 << 30));
 		reg32 |= 1 << 23;
+		reg32 |= 1 << 24;    /* Disable listen mode (hotplug) */
 #endif
 		pci_write_config32(dev, 0x98, reg32);
 
@@ -159,6 +162,9 @@ static void sata_init(struct device *dev)
 		reg32 = read32(abar + 0x00);
 		reg32 |= 0x0c006000;  // set PSC+SSC+SALP+SSS
 		reg32 &= ~0x00020060; // clear SXS+EMS+PMS
+#if CONFIG_INTEL_LYNXPOINT_LP
+		reg32 |= (1 << 18);   // SAM: SATA AHCI MODE ONLY
+#endif
 		write32(abar + 0x00, reg32);
 		/* PI (Ports implemented) */
 		write32(abar + 0x0c, config->sata_port_map);
@@ -166,12 +172,13 @@ static void sata_init(struct device *dev)
 		(void) read32(abar + 0x0c); /* Read back 2 */
 		/* CAP2 (HBA Capabilities Extended)*/
 		reg32 = read32(abar + 0x24);
+#if CONFIG_INTEL_LYNXPOINT_LP
+		/* Enable DEVSLP */
+		reg32 |= (1 << 5)|(1 << 4)|(1 << 3)|(1 << 2);
+#else
 		reg32 &= ~0x00000002;
+#endif
 		write32(abar + 0x24, reg32);
-		/* VSP (Vendor Specific Register */
-		reg32 = read32(abar + 0xa0);
-		reg32 &= ~0x00000005;
-		write32(abar + 0xa0, reg32);
 	} else {
 		printk(BIOS_DEBUG, "SATA: Controller in plain mode.\n");
 
@@ -230,15 +237,33 @@ static void sata_init(struct device *dev)
 
 	/* Additional Programming Requirements */
 	/* Power Optimizer */
+
+	/* Step 1 */
+#if CONFIG_INTEL_LYNXPOINT_LP
+	sir_write(dev, 0x64, 0x883c9003);
+#else
 	sir_write(dev, 0x64, 0x883c9001);
+#endif
 
+	/* Step 2: SIR 68h[15:0] = 880Ah */
 	reg32 = sir_read(dev, 0x68);
 	reg32 &= 0xffff0000;
 	reg32 |= 0x880a;
 	sir_write(dev, 0x68, reg32);
 
+	/* Step 3: SIR 60h[3] = 1 */
+	reg32 = sir_read(dev, 0x60);
+	reg32 |= (1 << 3);
+	sir_write(dev, 0x60, reg32);
+
+	/* Step 4: SIR 60h[0] = 1 */
+	reg32 = sir_read(dev, 0x60);
+	reg32 |= (1 << 0);
+	sir_write(dev, 0x60, reg32);
+
+	/* Step 5: SIR 60h[1] = 1 */
 	reg32 = sir_read(dev, 0x60);
-	reg32 |= (1 << 0) | (1 << 1) | (1 << 3);
+	reg32 |= (1 << 1);
 	sir_write(dev, 0x60, reg32);
 
 	/* Clock Gating */
diff --git a/src/southbridge/intel/lynxpoint/spi.c b/src/southbridge/intel/lynxpoint/spi.c
index ec7c862beb..123c6a9d62 100644
--- a/src/southbridge/intel/lynxpoint/spi.c
+++ b/src/southbridge/intel/lynxpoint/spi.c
@@ -68,18 +68,6 @@ typedef struct spi_slave ich_spi_slave;
 
 static int ichspi_lock = 0;
 
-typedef struct ich7_spi_regs {
-	uint16_t spis;
-	uint16_t spic;
-	uint32_t spia;
-	uint64_t spid[8];
-	uint64_t _pad;
-	uint32_t bbar;
-	uint16_t preop;
-	uint16_t optype;
-	uint8_t opmenu[8];
-} __attribute__((packed)) ich7_spi_regs;
-
 typedef struct ich9_spi_regs {
 	uint32_t bfpr;
 	uint16_t hsfs;
@@ -302,110 +290,40 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	return slave;
 }
 
-/*
- * Check if this device ID matches one of supported Intel PCH devices.
- *
- * Return the ICH version if there is a match, or zero otherwise.
- */
-static inline int get_ich_version(uint16_t device_id)
-{
-	if (device_id >= PCI_DEVICE_ID_INTEL_LYNXPOINT_MOB_DESK_MIN &&
-	    device_id <= PCI_DEVICE_ID_INTEL_LYNXPOINT_MOB_DESK_MAX)
-		return 9;
-
-	return 0;
-}
-
 void spi_init(void)
 {
-	int ich_version = 0;
-
 	uint8_t *rcrb; /* Root Complex Register Block */
 	uint32_t rcba; /* Root Complex Base Address */
 	uint8_t bios_cntl;
 	device_t dev;
-	uint32_t ids;
-	uint16_t vendor_id, device_id;
+	ich9_spi_regs *ich9_spi;
 
 #ifdef __SMM__
 	dev = PCI_DEV(0, 31, 0);
 #else
 	dev = dev_find_slot(0, PCI_DEVFN(31, 0));
 #endif
-	pci_read_config_dword(dev, 0, &ids);
-	vendor_id = ids;
-	device_id = (ids >> 16);
-
-	if (vendor_id != PCI_VENDOR_ID_INTEL) {
-		printk(BIOS_DEBUG, "ICH SPI: No ICH found.\n");
-		return;
-	}
-
-	ich_version = get_ich_version(device_id);
-
-	if (!ich_version) {
-		printk(BIOS_DEBUG, "ICH SPI: No known ICH found.\n");
-		return;
-	}
 
 	pci_read_config_dword(dev, 0xf0, &rcba);
 	/* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */
 	rcrb = (uint8_t *)(rcba & 0xffffc000);
-	switch (ich_version) {
-	case 7:
-		{
-			const uint16_t ich7_spibar_offset = 0x3020;
-			ich7_spi_regs *ich7_spi =
-				(ich7_spi_regs *)(rcrb + ich7_spibar_offset);
-
-			ichspi_lock = readw_(&ich7_spi->spis) & SPIS_LOCK;
-			cntlr.opmenu = ich7_spi->opmenu;
-			cntlr.menubytes = sizeof(ich7_spi->opmenu);
-			cntlr.optype = &ich7_spi->optype;
-			cntlr.addr = &ich7_spi->spia;
-			cntlr.data = (uint8_t *)ich7_spi->spid;
-			cntlr.databytes = sizeof(ich7_spi->spid);
-			cntlr.status = (uint8_t *)&ich7_spi->spis;
-			cntlr.control = &ich7_spi->spic;
-			cntlr.bbar = &ich7_spi->bbar;
-			cntlr.preop = &ich7_spi->preop;
-			break;
-		}
-	case 9:
-		{
-			const uint16_t ich9_spibar_offset = 0x3800;
-			ich9_spi_regs *ich9_spi =
-				(ich9_spi_regs *)(rcrb + ich9_spibar_offset);
-			ichspi_lock = readw_(&ich9_spi->hsfs) & HSFS_FLOCKDN;
-			cntlr.opmenu = ich9_spi->opmenu;
-			cntlr.menubytes = sizeof(ich9_spi->opmenu);
-			cntlr.optype = &ich9_spi->optype;
-			cntlr.addr = &ich9_spi->faddr;
-			cntlr.data = (uint8_t *)ich9_spi->fdata;
-			cntlr.databytes = sizeof(ich9_spi->fdata);
-			cntlr.status = &ich9_spi->ssfs;
-			cntlr.control = (uint16_t *)ich9_spi->ssfc;
-			cntlr.bbar = &ich9_spi->bbar;
-			cntlr.preop = &ich9_spi->preop;
-			break;
-		}
-	default:
-		printk(BIOS_DEBUG, "ICH SPI: Unrecognized ICH version %d.\n", ich_version);
-	}
-
+	ich9_spi = (ich9_spi_regs *)(rcrb + 0x3800);
+	ichspi_lock = readw_(&ich9_spi->hsfs) & HSFS_FLOCKDN;
+	cntlr.opmenu = ich9_spi->opmenu;
+	cntlr.menubytes = sizeof(ich9_spi->opmenu);
+	cntlr.optype = &ich9_spi->optype;
+	cntlr.addr = &ich9_spi->faddr;
+	cntlr.data = (uint8_t *)ich9_spi->fdata;
+	cntlr.databytes = sizeof(ich9_spi->fdata);
+	cntlr.status = &ich9_spi->ssfs;
+	cntlr.control = (uint16_t *)ich9_spi->ssfc;
+	cntlr.bbar = &ich9_spi->bbar;
+	cntlr.preop = &ich9_spi->preop;
 	ich_set_bbar(0);
 
 	/* Disable the BIOS write protect so write commands are allowed. */
 	pci_read_config_byte(dev, 0xdc, &bios_cntl);
-	switch (ich_version) {
-	case 9:
-		/* Deassert SMM BIOS Write Protect Disable. */
-		bios_cntl &= ~(1 << 5);
-		break;
-
-	default:
-		break;
-	}
+	bios_cntl &= ~(1 << 5);
 	pci_write_config_byte(dev, 0xdc, bios_cntl | 0x1);
 }