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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include "chip.h"
#include "i82801gx.h"
#include "sata.h"
typedef struct southbridge_intel_i82801gx_config config_t;
static u8 get_ich7_sata_ports(void)
{
struct device *lpc;
lpc = pcidev_on_root(31, 0);
switch (pci_read_config16(lpc, PCI_DEVICE_ID)) {
case 0x27b0:
case 0x27b8:
return 0xf;
case 0x27b9:
case 0x27bd:
return 0x5;
case 0x27bc:
return 0x3;
default:
printk(BIOS_ERR, "i82801gx_sata: error: cannot determine port config\n");
return 0;
}
}
void sata_enable(struct device *dev)
{
/* Get the chip configuration */
struct southbridge_intel_i82801gx_config *config = dev->chip_info;
if (config->sata_mode == SATA_MODE_AHCI) {
/* Check if the southbridge supports AHCI */
struct device *lpc_dev = pcidev_on_root(31, 0);
if (!lpc_dev) {
/* According to the PCI spec function 0 on a bus:device
needs to be active for other functions to be enabled.
Since SATA is on the same bus:device as the LPC
bridge, it makes little sense to continue. */
die("Couldn't find the LPC device!\n");
}
const bool ahci_supported = !(pci_read_config32(lpc_dev, FDVCT)
& AHCI_UNSUPPORTED);
if (!ahci_supported) {
/* Fallback to IDE PLAIN for sata for the rest of the initialization */
config->sata_mode = SATA_MODE_IDE_PLAIN;
printk(BIOS_DEBUG, "AHCI not supported, falling back to plain mode.\n");
}
}
if (config->sata_mode == SATA_MODE_AHCI) {
/* Set map to ahci */
pci_write_config8(dev, SATA_MAP,
(pci_read_config8(dev, SATA_MAP) & ~0xc3) | 0x40);
} else {
/* Set map to ide */
pci_write_config8(dev, SATA_MAP, pci_read_config8(dev, SATA_MAP) & ~0xc3);
}
/* At this point, the new pci id will appear on the bus */
}
static void sata_init(struct device *dev)
{
u32 reg32;
u16 reg16;
u8 ports;
/* Get the chip configuration */
config_t *config = dev->chip_info;
printk(BIOS_DEBUG, "i82801gx_sata: initializing...\n");
if (config == NULL) {
printk(BIOS_ERR, "i82801gx_sata: error: device not in devicetree.cb!\n");
return;
}
/* Get ICH7 SATA port config */
ports = get_ich7_sata_ports();
/* Enable BARs */
pci_write_config16(dev, PCI_COMMAND, 0x0007);
switch (config->sata_mode) {
case SATA_MODE_IDE_LEGACY_COMBINED:
printk(BIOS_DEBUG, "SATA controller in combined mode.\n");
/* No AHCI: clear AHCI base */
pci_write_config32(dev, PCI_BASE_ADDRESS_5, 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);
/* Combine IDE - SATA configuration */
pci_write_config8(dev, SATA_MAP, 0x02);
/* Restrict ports - 0 and 2 only available */
ports &= 0x5;
break;
case SATA_MODE_AHCI:
printk(BIOS_DEBUG, "SATA controller in AHCI mode.\n");
/* Allow both Legacy and Native mode */
pci_write_config8(dev, 0x09, 0x8f);
/* Set Interrupt Line */
/* Interrupt Pin is set by D31IP.PIP */
pci_write_config8(dev, INTR_LN, 0x0a);
struct resource *ahci_res = find_resource(dev, PCI_BASE_ADDRESS_5);
if (ahci_res != NULL)
/* write AHCI GHC_PI register */
write32(res2mmio(ahci_res, 0xc, 0), config->sata_ports_implemented);
break;
default:
case SATA_MODE_IDE_PLAIN:
printk(BIOS_DEBUG, "SATA controller in plain mode.\n");
/* Set Sata Controller Mode. No Mapping(?) */
pci_write_config8(dev, SATA_MAP, 0x00);
/* No AHCI: clear AHCI base */
pci_write_config32(dev, PCI_BASE_ADDRESS_5, 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);
/* Native mode capable on both primary and secondary (0xa)
* or'ed with enabled (0x50) = 0xf
*/
pci_write_config8(dev, 0x09, 0x8f);
/* Set Interrupt Line */
/* Interrupt Pin is set by D31IP.PIP */
pci_write_config8(dev, INTR_LN, 0xff);
/* Set timings */
pci_write_config16(dev, IDE_TIM_PRI, IDE_DECODE_ENABLE |
IDE_ISP_3_CLOCKS | IDE_RCT_1_CLOCKS |
IDE_PPE0 | IDE_IE0 | IDE_TIME0);
pci_write_config16(dev, IDE_TIM_SEC, IDE_DECODE_ENABLE |
IDE_SITRE | IDE_ISP_3_CLOCKS |
IDE_RCT_1_CLOCKS | IDE_IE0 | IDE_TIME0);
/* Sync DMA */
pci_write_config16(dev, IDE_SDMA_CNT, IDE_SSDE0 | IDE_PSDE0);
pci_write_config16(dev, IDE_SDMA_TIM, 0x0201);
/* Set IDE I/O Configuration */
reg32 = SIG_MODE_PRI_NORMAL | FAST_PCB1 | FAST_PCB0 | PCB1 | PCB0;
pci_write_config32(dev, IDE_CONFIG, reg32);
break;
}
/* Set port control */
pci_write_config8(dev, SATA_PCS, ports);
/* Enable clock gating for unused ports and set initialization reg */
pci_write_config32(dev, SATA_IR, SIF3(ports) | SIF2 | SIF1 | SCRE);
/* All configurations need this SATA initialization sequence */
pci_write_config8(dev, 0xa0, 0x40);
pci_write_config8(dev, 0xa6, 0x22);
pci_write_config8(dev, 0xa0, 0x78);
pci_write_config8(dev, 0xa6, 0x22);
pci_write_config8(dev, 0xa0, 0x88);
reg32 = pci_read_config32(dev, 0xa4);
reg32 &= 0xc0c0c0c0;
reg32 |= 0x1b1b1212;
pci_write_config32(dev, 0xa4, reg32);
pci_write_config8(dev, 0xa0, 0x8c);
reg32 = pci_read_config32(dev, 0xa4);
reg32 &= 0xc0c0ff00;
reg32 |= 0x121200aa;
pci_write_config32(dev, 0xa4, reg32);
pci_write_config8(dev, 0xa0, 0x00);
pci_write_config8(dev, PCI_INTERRUPT_LINE, 0);
/* Sata Initialization Register */
reg32 = pci_read_config32(dev, SATA_IR);
reg32 |= SCRD; // due to some bug
pci_write_config32(dev, SATA_IR, reg32);
}
static struct pci_operations sata_pci_ops = {
.set_subsystem = pci_dev_set_subsystem,
};
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 = i82801gx_enable,
.ops_pci = &sata_pci_ops,
};
static const unsigned short sata_ids[] = {
0x27c0, /* Desktop Non-AHCI and Non-RAID Mode: 82801GB/GR/GDH (ICH7/ICH7R/ICH7DH) */
0x27c1, /* Desktop AHCI Mode: 82801GB/GR/GDH (ICH7/ICH7R/ICH7DH) */
0x27c4, /* Mobile Non-AHCI and Non-RAID Mode: 82801GBM/GHM (ICH7-M/ICH7-M DH) */
0x27c5, /* Mobile AHCI Mode: 82801GBM/GHM (ICH7-M/ICH7-M DH) */
/* NOTE: Any of the below are not properly supported yet. */
0x27c3, /* Desktop RAID mode: 82801GB/GR/GDH (ICH7/ICH7R/ICH7DH) */
0x27c6, /* ICH7M DH Raid Mode: 82801GHM (ICH7-M DH) */
0
};
static const struct pci_driver i82801gx_sata_driver __pci_driver = {
.ops = &sata_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.devices = sata_ids,
};
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