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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
/* 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 "chip.h"
#include "i82801gx.h"
#define HDA_ICII_REG 0x68
#define HDA_ICII_BUSY (1 << 0)
#define HDA_ICII_VALID (1 << 1)
static int set_bits(void *port, u32 mask, u32 val)
{
u32 reg32;
int count;
/* Write (val & mask) to port */
val &= mask;
reg32 = read32(port);
reg32 &= ~mask;
reg32 |= val;
write32(port, reg32);
/* Wait for readback of register to match what was just written to it */
count = 50;
do {
/* Wait 1ms based on BKDG wait time */
mdelay(1);
reg32 = read32(port);
reg32 &= mask;
} while ((reg32 != val) && --count);
/* Timeout occurred */
if (!count)
return -1;
return 0;
}
static int codec_detect(u8 *base)
{
u32 reg32;
/* Set Bit0 to 0 to enter reset state (BAR + 0x8)[0] */
if (set_bits(base + 0x08, 1, 0) == -1)
goto no_codec;
/* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */
if (set_bits(base + 0x08, 1, 1) == -1)
goto no_codec;
/* Read in Codec location (BAR + 0xe)[2..0]*/
reg32 = read32(base + 0xe);
reg32 &= 0x0f;
if (!reg32)
goto no_codec;
return reg32;
no_codec:
/* Codec Not found */
/* Put HDA back in reset (BAR + 0x8) [0] */
set_bits(base + 0x08, 1, 0);
printk(BIOS_DEBUG, "Azalia: No codec!\n");
return 0;
}
static u32 find_verb(struct device *dev, u32 viddid, const u32 **verb)
{
int idx = 0;
while (idx < (cim_verb_data_size / sizeof(u32))) {
u32 verb_size = 4 * cim_verb_data[idx+2]; // in u32
if (cim_verb_data[idx] != viddid) {
idx += verb_size + 3; // skip verb + header
continue;
}
*verb = &cim_verb_data[idx+3];
return verb_size;
}
/* Not all codecs need to load another verb */
return 0;
}
/**
* Wait 50usec for the codec to indicate it is ready
* no response would imply that the codec is non-operative
*/
static int wait_for_ready(u8 *base)
{
/* Use a 50 usec timeout - the Linux kernel uses the same duration */
int timeout = 50;
while (timeout--) {
u32 reg32 = read32(base + HDA_ICII_REG);
if (!(reg32 & HDA_ICII_BUSY))
return 0;
udelay(1);
}
return -1;
}
/**
* Wait 50usec for the codec to indicate that it accepted the previous command.
* No response would imply that the code is non-operative.
*/
static int wait_for_valid(u8 *base)
{
u32 reg32;
/* Send the verb to the codec */
reg32 = read32(base + 0x68);
reg32 |= (1 << 0) | (1 << 1);
write32(base + 0x68, reg32);
/* Use a 50 usec timeout - the Linux kernel uses the same duration */
int timeout = 50;
while (timeout--) {
reg32 = read32(base + HDA_ICII_REG);
if ((reg32 & (HDA_ICII_VALID | HDA_ICII_BUSY)) == HDA_ICII_VALID)
return 0;
udelay(1);
}
return -1;
}
static void codec_init(struct device *dev, u8 *base, int addr)
{
u32 reg32;
const u32 *verb;
u32 verb_size;
int i;
printk(BIOS_DEBUG, "Azalia: Initializing codec #%d\n", addr);
/* 1 */
if (wait_for_ready(base) == -1)
return;
reg32 = (addr << 28) | 0x000f0000;
write32(base + 0x60, reg32);
if (wait_for_valid(base) == -1)
return;
reg32 = read32(base + 0x64);
/* 2 */
printk(BIOS_DEBUG, "Azalia: codec viddid: %08x\n", reg32);
verb_size = find_verb(dev, reg32, &verb);
if (!verb_size) {
printk(BIOS_DEBUG, "Azalia: No verb!\n");
return;
}
printk(BIOS_DEBUG, "Azalia: verb_size: %d\n", verb_size);
/* 3 */
for (i = 0; i < verb_size; i++) {
if (wait_for_ready(base) == -1)
return;
write32(base + 0x60, verb[i]);
if (wait_for_valid(base) == -1)
return;
}
printk(BIOS_DEBUG, "Azalia: verb loaded.\n");
}
static void codecs_init(struct device *dev, u8 *base, u32 codec_mask)
{
int i;
for (i = 2; i >= 0; i--) {
if (codec_mask & (1 << i))
codec_init(dev, base, i);
}
}
static void azalia_init(struct device *dev)
{
u8 *base;
struct resource *res;
u32 codec_mask;
u8 reg8;
// ESD
pci_update_config32(dev, 0x134, ~(0xff << 16), 2 << 16);
// Link1 description
pci_update_config32(dev, 0x140, ~(0xff << 16), 2 << 16);
// Port VC0 Resource Control Register
pci_update_config32(dev, 0x114, ~(0xff << 0), 1);
// VCi traffic class
pci_or_config8(dev, 0x44, 7 << 0); // TC7
// VCi Resource Control
pci_or_config32(dev, 0x120, (1 << 31) | (1 << 24) | (0x80 << 0)); /* VCi ID and map */
/* Set Bus Master */
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
pci_write_config8(dev, 0x3c, 0x0a); // unused?
// TODO Actually check if we're AC97 or HDA instead of hardcoding this
// here, in devicetree.cb and/or romstage.c.
reg8 = pci_read_config8(dev, 0x40);
reg8 |= (1 << 3); // Clear Clock Detect Bit
pci_write_config8(dev, 0x40, reg8);
reg8 &= ~(1 << 3); // Keep CLKDETCLR from clearing the bit over and over
pci_write_config8(dev, 0x40, reg8);
reg8 |= (1 << 2); // Enable clock detection
pci_write_config8(dev, 0x40, reg8);
mdelay(1);
reg8 = pci_read_config8(dev, 0x40);
printk(BIOS_DEBUG, "Azalia: codec type: %s\n", (reg8 & (1 << 1))?"Azalia":"AC97");
// 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
res = find_resource(dev, 0x10);
if (!res)
return;
// NOTE this will break as soon as the Azalia get's a bar above
// 4G. Is there anything we can do about it?
base = res2mmio(res, 0, 0);
printk(BIOS_DEBUG, "Azalia: base = %08x\n", (u32)base);
codec_mask = codec_detect(base);
if (codec_mask) {
printk(BIOS_DEBUG, "Azalia: codec_mask = %02x\n", codec_mask);
codecs_init(dev, base, codec_mask);
}
}
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,
.enable = i82801gx_enable,
.ops_pci = &pci_dev_ops_pci,
};
/* 82801GB/GR/GDH/GBM/GHM (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH) */
static const struct pci_driver i82801gx_azalia __pci_driver = {
.ops = &azalia_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x27d8,
};
|
