summaryrefslogtreecommitdiff
path: root/src/southbridge/amd/pi/hudson/sata.c
blob: ba1c54fe000e7037f711cf9f6bd3dc6bc653753e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */

#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>

#include "hudson.h"

static void sata_init(struct device *dev)
{
#if CONFIG(SOUTHBRIDGE_AMD_PI_AVALON) || CONFIG(SOUTHBRIDGE_AMD_PI_KERN)
	/**************************************
	 * Configure the SATA port multiplier *
	 **************************************/
	#define BYTE_TO_DWORD_OFFSET(x) (x/4)
	#define AHCI_BASE_ADDRESS_REG 0x24
	#define MISC_CONTROL_REG 0x40
	#define UNLOCK_BIT (1<<0)
	#define SATA_CAPABILITIES_REG 0xFC
	#define CFG_CAP_SPM (1<<12)

	volatile u32 *ahci_ptr =
		(u32*)(pci_read_config32(dev, AHCI_BASE_ADDRESS_REG) & 0xFFFFFF00);
	u32 temp;

	/* unlock the write-protect */
	temp = pci_read_config32(dev, MISC_CONTROL_REG);
	temp |= UNLOCK_BIT;
	pci_write_config32(dev, MISC_CONTROL_REG, temp);

	/* set the SATA AHCI mode to allow port expanders */
	*(ahci_ptr + BYTE_TO_DWORD_OFFSET(SATA_CAPABILITIES_REG)) |= CFG_CAP_SPM;

	/* lock the write-protect */
	temp = pci_read_config32(dev, MISC_CONTROL_REG);
	temp &= ~UNLOCK_BIT;
	pci_write_config32(dev, MISC_CONTROL_REG, temp);
#endif
};

static struct pci_operations lops_pci = {
	/* .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,
	.ops_pci = &lops_pci,
};

static const unsigned short pci_device_ids[] = {
	PCI_DEVICE_ID_AMD_SB900_SATA,
	PCI_DEVICE_ID_AMD_SB900_SATA_AHCI,
	PCI_DEVICE_ID_AMD_CZ_SATA,
	PCI_DEVICE_ID_AMD_CZ_SATA_AHCI,
	0
};

static const struct pci_driver sata0_driver __pci_driver = {
	.ops = &sata_ops,
	.vendor = PCI_VENDOR_ID_AMD,
	.devices = pci_device_ids,
};