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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <device/mmio.h>
#include <delay.h>
#include <device/azalia_device.h>
#include "pch.h"
static int codec_detect(u8 *base)
{
u8 reg8;
if (azalia_exit_reset(base) < 0)
goto no_codec;
/* Write back the value once reset bit is set. */
write16(base + HDA_GCAP_REG, read16(base + HDA_GCAP_REG));
/* Read in Codec location (BAR + 0xe)[2..0] */
reg8 = read8(base + HDA_STATESTS_REG);
reg8 &= 0x0f;
if (!reg8)
goto no_codec;
return reg8;
no_codec:
/* Codec not found, put HDA back in reset */
azalia_enter_reset(base);
printk(BIOS_DEBUG, "Azalia: No codec!\n");
return 0;
}
static void azalia_init(struct device *dev)
{
u8 *base;
struct resource *res;
u32 codec_mask;
u32 reg32;
/* Find base address */
res = probe_resource(dev, PCI_BASE_ADDRESS_0);
if (!res)
return;
// NOTE this will break as soon as the Azalia gets a bar above 4G.
// Is there anything we can do about it?
base = res2mmio(res, 0, 0);
printk(BIOS_DEBUG, "Azalia: base = %p\n", base);
if (RCBA32(0x2030) & (1 << 31)) {
reg32 = pci_read_config32(dev, 0x120);
reg32 &= 0xf8ffff01;
reg32 |= (1 << 24); // 2 << 24 for server
reg32 |= RCBA32(0x2030) & 0xfe;
pci_write_config32(dev, 0x120, reg32);
pci_or_config16(dev, 0x78, 1 << 11);
} else
printk(BIOS_DEBUG, "Azalia: V1CTL disabled.\n");
pci_and_config32(dev, 0x114, ~0xfe);
// Set VCi enable bit
pci_or_config32(dev, 0x120, 1 << 31);
// Enable HDMI codec:
pci_or_config32(dev, 0xc4, 1 << 1);
pci_or_config8(dev, 0x43, 1 << 6);
pci_and_config32(dev, 0xd0, ~(1 << 31));
/* Set Bus Master */
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
pci_write_config8(dev, 0x3c, 0x0a); // unused?
/* Codec Initialization Programming Sequence */
/* Take controller out of reset */
reg32 = read32(base + HDA_GCTL_REG);
reg32 |= HDA_GCTL_CRST;
write32(base + HDA_GCTL_REG, reg32);
/* Wait 1ms */
udelay(1000);
// Select Azalia mode. This needs to be controlled via devicetree.cb
pci_or_config8(dev, 0x40, 1); // Audio Control
// Docking not supported
pci_and_config8(dev, 0x4d, (u8)~(1 << 7)); // Docking Status
codec_mask = codec_detect(base);
if (codec_mask) {
printk(BIOS_DEBUG, "Azalia: codec_mask = %02x\n", codec_mask);
azalia_codecs_init(base, codec_mask);
}
/* Enable dynamic clock gating */
pci_update_config8(dev, 0x43, ~0x07, (1 << 2) | (1 << 0));
}
static struct device_operations azalia_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = azalia_init,
.ops_pci = &pci_dev_ops_pci,
};
static const unsigned short pci_device_ids[] = {
0x1c20,
0x1e20,
PCI_DID_INTEL_IBEXPEAK_AUDIO,
0
};
static const struct pci_driver pch_azalia __pci_driver = {
.ops = &azalia_ops,
.vendor = PCI_VID_INTEL,
.devices = pci_device_ids,
};
|
