This source file includes following definitions.
- snd_hdac_ext_bus_ppcap_enable
- snd_hdac_ext_bus_ppcap_int_enable
- snd_hdac_ext_bus_get_ml_capabilities
- snd_hdac_link_free_all
- snd_hdac_ext_bus_get_link
- check_hdac_link_power_active
- snd_hdac_ext_bus_link_power_up
- snd_hdac_ext_bus_link_power_down
- snd_hdac_ext_bus_link_power_up_all
- snd_hdac_ext_bus_link_power_down_all
- snd_hdac_ext_bus_link_get
- snd_hdac_ext_bus_link_put
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12 #include <linux/delay.h>
13 #include <linux/slab.h>
14 #include <sound/hda_register.h>
15 #include <sound/hdaudio_ext.h>
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21
22 #define HDAC_MAX_CAPS 10
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34 void snd_hdac_ext_bus_ppcap_enable(struct hdac_bus *bus, bool enable)
35 {
36
37 if (!bus->ppcap) {
38 dev_err(bus->dev, "Address of PP capability is NULL");
39 return;
40 }
41
42 if (enable)
43 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
44 AZX_PPCTL_GPROCEN, AZX_PPCTL_GPROCEN);
45 else
46 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
47 AZX_PPCTL_GPROCEN, 0);
48 }
49 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_enable);
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54
55
56 void snd_hdac_ext_bus_ppcap_int_enable(struct hdac_bus *bus, bool enable)
57 {
58
59 if (!bus->ppcap) {
60 dev_err(bus->dev, "Address of PP capability is NULL\n");
61 return;
62 }
63
64 if (enable)
65 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
66 AZX_PPCTL_PIE, AZX_PPCTL_PIE);
67 else
68 snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL,
69 AZX_PPCTL_PIE, 0);
70 }
71 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_ppcap_int_enable);
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86 int snd_hdac_ext_bus_get_ml_capabilities(struct hdac_bus *bus)
87 {
88 int idx;
89 u32 link_count;
90 struct hdac_ext_link *hlink;
91
92 link_count = readl(bus->mlcap + AZX_REG_ML_MLCD) + 1;
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;
102 hlink->ml_addr = bus->mlcap + AZX_ML_BASE +
103 (AZX_ML_INTERVAL * idx);
104 hlink->lcaps = readl(hlink->ml_addr + AZX_REG_ML_LCAP);
105 hlink->lsdiid = readw(hlink->ml_addr + AZX_REG_ML_LSDIID);
106
107
108 hlink->ref_count = 1;
109
110 list_add_tail(&hlink->list, &bus->hlink_list);
111 }
112
113 return 0;
114 }
115 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_get_ml_capabilities);
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122
123 void snd_hdac_link_free_all(struct hdac_bus *bus)
124 {
125 struct hdac_ext_link *l;
126
127 while (!list_empty(&bus->hlink_list)) {
128 l = list_first_entry(&bus->hlink_list, struct hdac_ext_link, list);
129 list_del(&l->list);
130 kfree(l);
131 }
132 }
133 EXPORT_SYMBOL_GPL(snd_hdac_link_free_all);
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139
140 struct hdac_ext_link *snd_hdac_ext_bus_get_link(struct hdac_bus *bus,
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;
149 if (bus->idx != bus_idx)
150 return NULL;
151
152 list_for_each_entry(hlink, &bus->hlink_list, list) {
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;
167 int mask = (1 << AZX_MLCTL_CPA_SHIFT);
168
169 udelay(3);
170 timeout = 150;
171
172 do {
173 val = readl(link->ml_addr + AZX_REG_ML_LCTL);
174 if (enable) {
175 if (((val & mask) >> AZX_MLCTL_CPA_SHIFT))
176 return 0;
177 } else {
178 if (!((val & mask) >> AZX_MLCTL_CPA_SHIFT))
179 return 0;
180 }
181 udelay(3);
182 } while (--timeout);
183
184 return -EIO;
185 }
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189
190
191 int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link)
192 {
193 snd_hdac_updatel(link->ml_addr, AZX_REG_ML_LCTL,
194 AZX_MLCTL_SPA, AZX_MLCTL_SPA);
195
196 return check_hdac_link_power_active(link, true);
197 }
198 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up);
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202
203
204 int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link)
205 {
206 snd_hdac_updatel(link->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_SPA, 0);
207
208 return check_hdac_link_power_active(link, false);
209 }
210 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);
211
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215
216 int snd_hdac_ext_bus_link_power_up_all(struct hdac_bus *bus)
217 {
218 struct hdac_ext_link *hlink = NULL;
219 int ret;
220
221 list_for_each_entry(hlink, &bus->hlink_list, list) {
222 snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL,
223 AZX_MLCTL_SPA, AZX_MLCTL_SPA);
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);
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236
237 int snd_hdac_ext_bus_link_power_down_all(struct hdac_bus *bus)
238 {
239 struct hdac_ext_link *hlink = NULL;
240 int ret;
241
242 list_for_each_entry(hlink, &bus->hlink_list, list) {
243 snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL,
244 AZX_MLCTL_SPA, 0);
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);
253
254 int snd_hdac_ext_bus_link_get(struct hdac_bus *bus,
255 struct hdac_ext_link *link)
256 {
257 unsigned long codec_mask;
258 int ret = 0;
259
260 mutex_lock(&bus->lock);
261
262
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264
265
266 if (++link->ref_count == 1) {
267 if (!bus->cmd_dma_state) {
268 snd_hdac_bus_init_cmd_io(bus);
269 bus->cmd_dma_state = true;
270 }
271
272 ret = snd_hdac_ext_bus_link_power_up(link);
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277 snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV,
278 ML_LOSIDV_STREAM_MASK, 0);
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282
283 udelay(521);
284 codec_mask = snd_hdac_chip_readw(bus, STATESTS);
285 dev_dbg(bus->dev, "codec_mask = 0x%lx\n", codec_mask);
286 snd_hdac_chip_writew(bus, STATESTS, codec_mask);
287 if (!bus->codec_mask)
288 bus->codec_mask = codec_mask;
289 }
290
291 mutex_unlock(&bus->lock);
292 return ret;
293 }
294 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_get);
295
296 int snd_hdac_ext_bus_link_put(struct hdac_bus *bus,
297 struct hdac_ext_link *link)
298 {
299 int ret = 0;
300 struct hdac_ext_link *hlink;
301 bool link_up = false;
302
303 mutex_lock(&bus->lock);
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307
308
309 if (--link->ref_count == 0) {
310 ret = snd_hdac_ext_bus_link_power_down(link);
311
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315
316 list_for_each_entry(hlink, &bus->hlink_list, list) {
317 if (hlink->ref_count) {
318 link_up = true;
319 break;
320 }
321 }
322
323 if (!link_up) {
324 snd_hdac_bus_stop_cmd_io(bus);
325 bus->cmd_dma_state = false;
326 }
327 }
328
329 mutex_unlock(&bus->lock);
330 return ret;
331 }
332 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_put);