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/*
* 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.
*/
#include <arch/io.h>
#include <soc/pci_devs.h>
#include <soc/ramstage.h>
#include <soc/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) {
u8 *abar = (u8 *)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(struct device *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,
};
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