baytrail: Add SATA driver

Add SATA driver for baytrail platform.

BUG=chrome-os-partner:23643
TEST=Manual, in dev mode. Verify on rambi that SATA disk is detected, and
kernel is found + booted.

Change-Id: I5c13e03203c8f26d233c7d10af8ff6812c460578
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174914
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4913
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)

5 files changed, 279 insertions, 4 deletions

diff --git a/src/soc/intel/baytrail/Makefile.inc b/src/soc/intel/baytrail/Makefile.inc
index 3e62ccfa74..ad3f94f202 100644
--- a/src/soc/intel/baytrail/Makefile.inc
+++ b/src/soc/intel/baytrail/Makefile.inc
@@ -33,6 +33,7 @@ smm-y += smihandler.c
 ramstage-y += smm.c
 ramstage-y += southcluster.c
 ramstage-$(CONFIG_HAVE_REFCODE_BLOB) += refcode.c
+ramstage-y += sata.c
 
 # Remove as ramstage gets fleshed out
 ramstage-y += placeholders.c
diff --git a/src/soc/intel/baytrail/baytrail/pci_devs.h b/src/soc/intel/baytrail/baytrail/pci_devs.h
index f20102a625..6b38a71404 100644
--- a/src/soc/intel/baytrail/baytrail/pci_devs.h
+++ b/src/soc/intel/baytrail/baytrail/pci_devs.h
@@ -45,8 +45,10 @@
 /* SATA */
 #define SATA_DEV 19
 #define SATA_FUNC 0
-# define ACHI1_DEVID 0x0f22
-# define ACHI2_DEVID 0x0f23
+#define IDE1_DEVID  0x0f20
+#define IDE2_DEVID  0x0f21
+#define AHCI1_DEVID 0x0f22
+#define AHCI2_DEVID 0x0f23
 
 /* xHCI */
 #define XHCI_DEV 20
diff --git a/src/soc/intel/baytrail/baytrail/sata.h b/src/soc/intel/baytrail/baytrail/sata.h
new file mode 100644
index 0000000000..7704c18f34
--- /dev/null
+++ b/src/soc/intel/baytrail/baytrail/sata.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef BAYTRAIL_SATA_H
+#define BAYTRAIL_SATA_H
+
+#define SATA_SIRI 0xa0
+#define SATA_SIRD 0xa4
+
+#endif
diff --git a/src/soc/intel/baytrail/chip.h b/src/soc/intel/baytrail/chip.h
index b6d3f840d3..d17474faba 100644
--- a/src/soc/intel/baytrail/chip.h
+++ b/src/soc/intel/baytrail/chip.h
@@ -17,12 +17,18 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef _BAYTRAIL_CHIP_H_
-#define _BAYTRAIL_CHIP_H_
 /* The devicetree parser expects chip.h to reside directly in the path
  * specified by the devicetree. */
 
+#ifndef _BAYTRAIL_CHIP_H_
+#define _BAYTRAIL_CHIP_H_
+
+#include <stdint.h>
+
 struct soc_intel_baytrail_config {
+        uint8_t sata_port_map;
+        uint8_t sata_ahci;
+        uint8_t ide_legacy_combined;
 };
 
 extern struct chip_operations soc_intel_baytrail_ops;
diff --git a/src/soc/intel/baytrail/sata.c b/src/soc/intel/baytrail/sata.c
new file mode 100644
index 0000000000..28a2f8cae8
--- /dev/null
+++ b/src/soc/intel/baytrail/sata.c
@@ -0,0 +1,240 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <arch/io.h>
+#include <baytrail/pci_devs.h>
+#include <baytrail/ramstage.h>
+#include <baytrail/sata.h>
+#include <console/console.h>
+#include <delay.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+
+#include "chip.h"
+
+typedef struct soc_intel_baytrail_config config_t;
+
+static inline void sir_write(struct device *dev, int idx, u32 value)
+{
+	pci_write_config32(dev, SATA_SIRI, idx);
+	pci_write_config32(dev, SATA_SIRD, value);
+}
+
+static void sata_init(struct device *dev)
+{
+	config_t *config = dev->chip_info;
+	u32 reg32;
+	u16 reg16;
+	u8  reg8;
+
+	printk(BIOS_DEBUG, "SATA: Initializing...\n");
+
+	if (config == NULL) {
+		printk(BIOS_ERR, "SATA: ERROR: Device not in devicetree.cb!\n");
+		return;
+	}
+
+	if (!config->sata_ahci) {
+		/* Set legacy or native decoding mode */
+		if (config->ide_legacy_combined) {
+			reg8 = pci_read_config8(dev, 0x09);
+			reg8 &= ~0x5;
+			pci_write_config8(dev, 0x09, reg8);
+		} else {
+			reg8 = pci_read_config8(dev, 0x09);
+			reg8 |= 0x5;
+			pci_write_config8(dev, 0x09, reg8);
+		}
+
+		/* Set capabilities pointer */
+		pci_write_config8(dev, 0x34, 0x70);
+		reg16 = pci_read_config16(dev, 0x70);
+		reg16 &= ~0xFF00;
+		pci_write_config16(dev, 0x70, reg16);
+	}
+
+	/* Primary timing - decode enable */
+	reg16 = pci_read_config16(dev, 0x40);
+	reg16 |= 1 << 15;
+	pci_write_config16(dev, 0x40, reg16);
+
+	/* Secondary timing - decode enable */
+	reg16 = pci_read_config16(dev, 0x42);
+	reg16 |= 1 << 15;
+	pci_write_config16(dev, 0x42, reg16);
+
+	/* Port mapping enables */
+	reg16 = pci_read_config16(dev, 0x90);
+	reg16 |= (config->sata_port_map ^ 0x3) << 8;
+	pci_write_config16(dev, 0x90, reg16);
+
+	/* Port control enables */
+	reg16 = pci_read_config16(dev, 0x92);
+	reg16 &= ~0x003f;
+	reg16 |= config->sata_port_map;
+	pci_write_config16(dev, 0x92, reg16);
+
+	if (config->sata_ahci) {
+		u32 abar = pci_read_config32(dev, PCI_BASE_ADDRESS_5);
+
+		/* Enable CR memory space decoding */
+		reg16 = pci_read_config16(dev, 0x04);
+		reg16 |= 0x2;
+		pci_write_config16(dev, 0x04, reg16);
+
+		/* Set capability register */
+		reg32 = read32(abar + 0x00);
+		reg32 |= 0x0c046000;  // set PSC+SSC+SALP+SSS+SAM
+		reg32 &= ~0x00f20060; // clear SXS+EMS+PMS+gen bits
+		reg32 |= (0x3 << 20); // Gen3 SATA
+		write32(abar + 0x00, reg32);
+
+		/* Ports enabled */
+		reg32 = read32(abar + 0x0c);
+		reg32 &= (u32)(~0x3f);
+		reg32 |= config->sata_port_map;
+		write32(abar + 0xc, reg32);
+		/* Two extra reads to latch */
+		read32(abar + 0x0c);
+		read32(abar + 0x0c);
+
+		/* Set cap2 - Support devslp */
+		reg32 = (1 << 5) | (1 << 4) | (1 << 3);
+		write32(abar + 0x24, reg32);
+
+		/* Set PxCMD registers */
+		reg32 = read32(abar + 0x118);
+		reg32 &= ~((1 << 27) | (1 << 26) | (1 << 22) | (1 << 21) |
+			(1 << 19) | (1 << 18) | (1 << 1));
+		reg32 |= 2;
+		write32(abar + 0x118, reg32);
+
+		reg32 = read32(abar + 0x198);
+		reg32 &= ~((1 << 27) | (1 << 26) | (1 << 22) | (1 << 21) |
+			(1 << 19) | (1 << 18) | (1 << 1));
+		reg32 |= 2;
+		write32(abar + 0x198, reg32);
+
+		/* Clear reset features */
+		write32(abar + 0xc8, 0);
+
+		/* Enable interrupts */
+		reg8 = read8(abar + 0x04);
+		reg8 |= 0x02;
+		write8(abar + 0x04, reg8);
+
+	} else {
+		/* TODO(shawnn): Configure IDE SATA speed regs */
+	}
+
+	/* 1.4 us delay after configuring port / enable bits */
+	udelay(2);
+
+	/* Enable clock for ports */
+	reg32 = pci_read_config32(dev, 0x94);
+	reg32 |= 0x3f << 24;
+	pci_write_config32(dev, 0x94, reg32);
+	reg32 &= (config->sata_port_map ^ 0x3) << 24;
+	pci_write_config32(dev, 0x94, reg32);
+
+	/* Lock SataGc register */
+	reg32 = (0x1 << 31) | (0x7 << 12);
+	pci_write_config32(dev, 0x98, reg32);
+}
+
+static void sata_enable(device_t dev)
+{
+	config_t *config = dev->chip_info;
+	u8  reg8;
+	u16 reg16;
+	u32 reg32;
+
+	southcluster_enable_dev(dev);
+	if (!config)
+		return;
+
+	/* Port mapping -- mask off SPD + SMS + SC bits, then re-set */
+	reg16 = pci_read_config16(dev, 0x90);
+	reg16 &= ~0x03e0;
+	reg16 |= (config->sata_port_map ^ 0x3) << 8;
+	if(config->sata_ahci)
+		reg16 |= 0x60;
+	pci_write_config16(dev, 0x90, reg16);
+
+	/* Set reg 0x94 before starting configuration */
+	reg32 = pci_read_config32(dev, 0x94);
+	reg32 &= (u32)(~0x1ff);
+	reg32 |= 0x183;
+	pci_write_config32(dev, 0x94, reg32);
+
+	/* Set ORM bit */
+	reg16 = pci_read_config16(dev, 0x92);
+	reg16 |= (1 << 15);
+	pci_write_config16(dev, 0x92, reg16);
+
+	/* R_PCH_SATA_TM2 - Undocumented in EDS, set according to ref. code */
+	reg32 = pci_read_config32(dev, 0x98);
+	reg32 &= (u32)~(0x1f80 | (1 << 6) | (1 << 5));
+	reg32 |= (1 << 29) | (1 << 25) | (1 << 23) | (1 << 22) |
+		 (1 << 20) | (1 << 19) | (1 << 18) | (1 << 9) | (1 << 5);
+	pci_write_config32(dev, 0x98, reg32);
+
+	/* CMD reg - set bus master enable (BME) */
+	reg8 = pci_read_config8(dev, 0x04);
+	reg8 |= (1 << 2);
+	pci_write_config8(dev, 0x04, reg8);
+
+	/* "Test mode registers" */
+	sir_write(dev, 0x70, 0x00288301);
+	sir_write(dev, 0x54, 0x00000300);
+	sir_write(dev, 0x58, 0x50000000);
+	/* "OOB Detection Margin */
+	sir_write(dev, 0x6c, 0x130C0603);
+	/* "Gasket Control" */
+	sir_write(dev, 0xf4, 0);
+
+	/* PCS - Enable requested SATA ports */
+	reg8 = pci_read_config8(dev, 0x92);
+	reg8 &= ~0x03;
+	reg8 |= config->sata_port_map;
+	pci_write_config8(dev, 0x92, reg8);
+}
+
+static struct device_operations sata_ops = {
+	.read_resources		= pci_dev_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_dev_enable_resources,
+	.init			= sata_init,
+	.enable			= sata_enable,
+	.scan_bus		= NULL,
+	.ops_pci		= &soc_pci_ops,
+};
+
+static const unsigned short pci_device_ids[] = {
+	IDE1_DEVID, IDE2_DEVID,			/* IDE */
+	AHCI1_DEVID, AHCI2_DEVID,		/* AHCI */
+	0,
+};
+
+static const struct pci_driver baytrail_sata __pci_driver = {
+	.ops     = &sata_ops,
+	.vendor  = PCI_VENDOR_ID_INTEL,
+	.devices = pci_device_ids,
+};