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8e8e69d6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
0b00a561 JK |
2 | /* |
3 | * hdac-ext-controller.c - HD-audio extended controller functions. | |
4 | * | |
5 | * Copyright (C) 2014-2015 Intel Corp | |
6 | * Author: Jeeja KP <jeeja.kp@intel.com> | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
0b00a561 JK |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
10 | */ | |
11 | ||
12 | #include <linux/delay.h> | |
13 | #include <linux/slab.h> | |
14 | #include <sound/hda_register.h> | |
15 | #include <sound/hdaudio_ext.h> | |
16 | ||
17 | /* | |
18 | * maximum HDAC capablities we should parse to avoid endless looping: | |
19 | * currently we have 4 extended caps, so this is future proof for now. | |
20 | * extend when this limit is seen meeting in real HW | |
21 | */ | |
22 | #define HDAC_MAX_CAPS 10 | |
23 | ||
0b00a561 JK |
24 | /* |
25 | * processing pipe helpers - these helpers are useful for dealing with HDA | |
26 | * new capability of processing pipelines | |
27 | */ | |
28 | ||
29 | /** | |
30 | * snd_hdac_ext_bus_ppcap_enable - enable/disable processing pipe capability | |
31 | * @ebus: HD-audio extended core bus | |
32 | * @enable: flag to turn on/off the capability | |
33 | */ | |
76f56fae | 34 | void snd_hdac_ext_bus_ppcap_enable(struct hdac_bus *bus, bool enable) |
0b00a561 | 35 | { |
0b00a561 | 36 | |
ec8ae570 | 37 | if (!bus->ppcap) { |
0b00a561 JK |
38 | dev_err(bus->dev, "Address of PP capability is NULL"); |
39 | return; | |
40 | } | |
41 | ||
42 | if (enable) | |
c32bf867 KJ |
43 | snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, |
44 | AZX_PPCTL_GPROCEN, AZX_PPCTL_GPROCEN); | |
0b00a561 | 45 | else |
c32bf867 KJ |
46 | snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, |
47 | AZX_PPCTL_GPROCEN, 0); | |
0b00a561 JK |
48 | } |
49 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable); | |
50 | ||
51 | /** | |
52 | * snd_hdac_ext_bus_ppcap_int_enable - ppcap interrupt enable/disable | |
53 | * @ebus: HD-audio extended core bus | |
54 | * @enable: flag to enable/disable interrupt | |
55 | */ | |
76f56fae | 56 | void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_bus *bus, bool enable) |
0b00a561 | 57 | { |
0b00a561 | 58 | |
ec8ae570 | 59 | if (!bus->ppcap) { |
0b00a561 JK |
60 | dev_err(bus->dev, "Address of PP capability is NULL\n"); |
61 | return; | |
62 | } | |
63 | ||
64 | if (enable) | |
c32bf867 KJ |
65 | snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, |
66 | AZX_PPCTL_PIE, AZX_PPCTL_PIE); | |
0b00a561 | 67 | else |
c32bf867 KJ |
68 | snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, |
69 | AZX_PPCTL_PIE, 0); | |
0b00a561 JK |
70 | } |
71 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable); | |
72 | ||
73 | /* | |
74 | * Multilink helpers - these helpers are useful for dealing with HDA | |
75 | * new multilink capability | |
76 | */ | |
77 | ||
78 | /** | |
79 | * snd_hdac_ext_bus_get_ml_capabilities - get multilink capability | |
80 | * @ebus: HD-audio extended core bus | |
81 | * | |
82 | * This will parse all links and read the mlink capabilities and add them | |
83 | * in hlink_list of extended hdac bus | |
84 | * Note: this will be freed on bus exit by driver | |
85 | */ | |
76f56fae | 86 | int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_bus *bus) |
0b00a561 JK |
87 | { |
88 | int idx; | |
89 | u32 link_count; | |
90 | struct hdac_ext_link *hlink; | |
0b00a561 | 91 | |
ec8ae570 | 92 | link_count = readl(bus->mlcap + AZX_REG_ML_MLCD) + 1; |
0b00a561 JK |
93 | |
94 | dev_dbg(bus->dev, "In %s Link count: %d\n", __func__, link_count); | |
95 | ||
96 | for (idx = 0; idx < link_count; idx++) { | |
97 | hlink = kzalloc(sizeof(*hlink), GFP_KERNEL); | |
98 | if (!hlink) | |
99 | return -ENOMEM; | |
100 | hlink->index = idx; | |
101 | hlink->bus = bus; | |
ec8ae570 | 102 | hlink->ml_addr = bus->mlcap + AZX_ML_BASE + |
0b00a561 | 103 | (AZX_ML_INTERVAL * idx); |
a7e3dd85 JK |
104 | hlink->lcaps = readl(hlink->ml_addr + AZX_REG_ML_LCAP); |
105 | hlink->lsdiid = readw(hlink->ml_addr + AZX_REG_ML_LSDIID); | |
0b00a561 | 106 | |
4446085d VK |
107 | /* since link in On, update the ref */ |
108 | hlink->ref_count = 1; | |
109 | ||
76f56fae | 110 | list_add_tail(&hlink->list, &bus->hlink_list); |
0b00a561 JK |
111 | } |
112 | ||
113 | return 0; | |
114 | } | |
115 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities); | |
116 | ||
bab4445f VK |
117 | /** |
118 | * snd_hdac_link_free_all- free hdac extended link objects | |
119 | * | |
120 | * @ebus: HD-audio ext core bus | |
121 | */ | |
122 | ||
76f56fae | 123 | void snd_hdac_link_free_all(struct hdac_bus *bus) |
bab4445f VK |
124 | { |
125 | struct hdac_ext_link *l; | |
126 | ||
76f56fae RU |
127 | while (!list_empty(&bus->hlink_list)) { |
128 | l = list_first_entry(&bus->hlink_list, struct hdac_ext_link, list); | |
bab4445f VK |
129 | list_del(&l->list); |
130 | kfree(l); | |
131 | } | |
132 | } | |
133 | EXPORT_SYMBOL_GPL(snd_hdac_link_free_all); | |
134 | ||
0b00a561 JK |
135 | /** |
136 | * snd_hdac_ext_bus_get_link_index - get link based on codec name | |
137 | * @ebus: HD-audio extended core bus | |
138 | * @codec_name: codec name | |
139 | */ | |
76f56fae | 140 | struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_bus *bus, |
0b00a561 JK |
141 | const char *codec_name) |
142 | { | |
143 | int i; | |
144 | struct hdac_ext_link *hlink = NULL; | |
145 | int bus_idx, addr; | |
146 | ||
147 | if (sscanf(codec_name, "ehdaudio%dD%d", &bus_idx, &addr) != 2) | |
148 | return NULL; | |
76f56fae | 149 | if (bus->idx != bus_idx) |
0b00a561 JK |
150 | return NULL; |
151 | ||
76f56fae | 152 | list_for_each_entry(hlink, &bus->hlink_list, list) { |
0b00a561 JK |
153 | for (i = 0; i < HDA_MAX_CODECS; i++) { |
154 | if (hlink->lsdiid & (0x1 << addr)) | |
155 | return hlink; | |
156 | } | |
157 | } | |
158 | ||
159 | return NULL; | |
160 | } | |
161 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_link); | |
162 | ||
163 | static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable) | |
164 | { | |
165 | int timeout; | |
166 | u32 val; | |
dde5bff5 | 167 | int mask = (1 << AZX_MLCTL_CPA_SHIFT); |
0b00a561 JK |
168 | |
169 | udelay(3); | |
cf8fe58b | 170 | timeout = 150; |
0b00a561 JK |
171 | |
172 | do { | |
a7e3dd85 | 173 | val = readl(link->ml_addr + AZX_REG_ML_LCTL); |
0b00a561 | 174 | if (enable) { |
dde5bff5 | 175 | if (((val & mask) >> AZX_MLCTL_CPA_SHIFT)) |
0b00a561 JK |
176 | return 0; |
177 | } else { | |
dde5bff5 | 178 | if (!((val & mask) >> AZX_MLCTL_CPA_SHIFT)) |
0b00a561 JK |
179 | return 0; |
180 | } | |
181 | udelay(3); | |
182 | } while (--timeout); | |
183 | ||
184 | return -EIO; | |
185 | } | |
186 | ||
187 | /** | |
188 | * snd_hdac_ext_bus_link_power_up -power up hda link | |
189 | * @link: HD-audio extended link | |
190 | */ | |
191 | int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link) | |
192 | { | |
c32bf867 KJ |
193 | snd_hdac_updatel(link->ml_addr, AZX_REG_ML_LCTL, |
194 | AZX_MLCTL_SPA, AZX_MLCTL_SPA); | |
0b00a561 JK |
195 | |
196 | return check_hdac_link_power_active(link, true); | |
197 | } | |
198 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up); | |
199 | ||
200 | /** | |
201 | * snd_hdac_ext_bus_link_power_down -power down hda link | |
202 | * @link: HD-audio extended link | |
203 | */ | |
204 | int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link) | |
205 | { | |
a7e3dd85 | 206 | snd_hdac_updatel(link->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_SPA, 0); |
0b00a561 JK |
207 | |
208 | return check_hdac_link_power_active(link, false); | |
209 | } | |
210 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); | |
c5b0c09b | 211 | |
6706a197 VK |
212 | /** |
213 | * snd_hdac_ext_bus_link_power_up_all -power up all hda link | |
214 | * @ebus: HD-audio extended bus | |
215 | */ | |
76f56fae | 216 | int snd_hdac_ext_bus_link_power_up_all(struct hdac_bus *bus) |
6706a197 VK |
217 | { |
218 | struct hdac_ext_link *hlink = NULL; | |
219 | int ret; | |
220 | ||
76f56fae | 221 | list_for_each_entry(hlink, &bus->hlink_list, list) { |
c32bf867 KJ |
222 | snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, |
223 | AZX_MLCTL_SPA, AZX_MLCTL_SPA); | |
6706a197 VK |
224 | ret = check_hdac_link_power_active(hlink, true); |
225 | if (ret < 0) | |
226 | return ret; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up_all); | |
232 | ||
c5b0c09b JK |
233 | /** |
234 | * snd_hdac_ext_bus_link_power_down_all -power down all hda link | |
235 | * @ebus: HD-audio extended bus | |
236 | */ | |
76f56fae | 237 | int snd_hdac_ext_bus_link_power_down_all(struct hdac_bus *bus) |
c5b0c09b JK |
238 | { |
239 | struct hdac_ext_link *hlink = NULL; | |
240 | int ret; | |
241 | ||
76f56fae | 242 | list_for_each_entry(hlink, &bus->hlink_list, list) { |
c32bf867 KJ |
243 | snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, |
244 | AZX_MLCTL_SPA, 0); | |
c5b0c09b JK |
245 | ret = check_hdac_link_power_active(hlink, false); |
246 | if (ret < 0) | |
247 | return ret; | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all); | |
4446085d | 253 | |
76f56fae | 254 | int snd_hdac_ext_bus_link_get(struct hdac_bus *bus, |
4446085d VK |
255 | struct hdac_ext_link *link) |
256 | { | |
257 | int ret = 0; | |
258 | ||
76f56fae | 259 | mutex_lock(&bus->lock); |
4446085d VK |
260 | |
261 | /* | |
262 | * if we move from 0 to 1, count will be 1 so power up this link | |
263 | * as well, also check the dma status and trigger that | |
264 | */ | |
265 | if (++link->ref_count == 1) { | |
76f56fae RU |
266 | if (!bus->cmd_dma_state) { |
267 | snd_hdac_bus_init_cmd_io(bus); | |
268 | bus->cmd_dma_state = true; | |
4446085d VK |
269 | } |
270 | ||
271 | ret = snd_hdac_ext_bus_link_power_up(link); | |
f8a7fe1a RU |
272 | |
273 | /* | |
274 | * wait for 521usec for codec to report status | |
275 | * HDA spec section 4.3 - Codec Discovery | |
276 | */ | |
277 | udelay(521); | |
278 | bus->codec_mask = snd_hdac_chip_readw(bus, STATESTS); | |
279 | dev_dbg(bus->dev, "codec_mask = 0x%lx\n", bus->codec_mask); | |
280 | snd_hdac_chip_writew(bus, STATESTS, bus->codec_mask); | |
4446085d VK |
281 | } |
282 | ||
76f56fae | 283 | mutex_unlock(&bus->lock); |
4446085d VK |
284 | return ret; |
285 | } | |
286 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_get); | |
287 | ||
76f56fae | 288 | int snd_hdac_ext_bus_link_put(struct hdac_bus *bus, |
4446085d VK |
289 | struct hdac_ext_link *link) |
290 | { | |
291 | int ret = 0; | |
292 | struct hdac_ext_link *hlink; | |
293 | bool link_up = false; | |
294 | ||
76f56fae | 295 | mutex_lock(&bus->lock); |
4446085d VK |
296 | |
297 | /* | |
298 | * if we move from 1 to 0, count will be 0 | |
299 | * so power down this link as well | |
300 | */ | |
301 | if (--link->ref_count == 0) { | |
302 | ret = snd_hdac_ext_bus_link_power_down(link); | |
303 | ||
304 | /* | |
305 | * now check if all links are off, if so turn off | |
306 | * cmd dma as well | |
307 | */ | |
76f56fae | 308 | list_for_each_entry(hlink, &bus->hlink_list, list) { |
4446085d VK |
309 | if (hlink->ref_count) { |
310 | link_up = true; | |
311 | break; | |
312 | } | |
313 | } | |
314 | ||
315 | if (!link_up) { | |
76f56fae RU |
316 | snd_hdac_bus_stop_cmd_io(bus); |
317 | bus->cmd_dma_state = false; | |
4446085d VK |
318 | } |
319 | } | |
320 | ||
76f56fae | 321 | mutex_unlock(&bus->lock); |
4446085d VK |
322 | return ret; |
323 | } | |
324 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_put); |