1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 //
3 // This file is provided under a dual BSD/GPLv2 license. When using or
4 // redistributing this file, you may do so under either license.
5 //
6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
7 //
8 // Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
9 // Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
10 // Rander Wang <rander.wang@intel.com>
11 // Keyon Jie <yang.jie@linux.intel.com>
12 //
13
14 /*
15 * Hardware interface for generic Intel audio DSP HDA IP
16 */
17
18 #include <linux/module.h>
19 #include <sound/hdaudio_ext.h>
20 #include <sound/hda_register.h>
21 #include <sound/hda_component.h>
22 #include <sound/hda-mlink.h>
23 #include "../ops.h"
24 #include "hda.h"
25
26 /*
27 * HDA Operations.
28 */
29
hda_dsp_ctrl_link_reset(struct snd_sof_dev * sdev,bool reset)30 int hda_dsp_ctrl_link_reset(struct snd_sof_dev *sdev, bool reset)
31 {
32 unsigned long timeout;
33 u32 gctl = 0;
34 u32 val;
35
36 /* 0 to enter reset and 1 to exit reset */
37 val = reset ? 0 : SOF_HDA_GCTL_RESET;
38
39 /* enter/exit HDA controller reset */
40 snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, SOF_HDA_GCTL,
41 SOF_HDA_GCTL_RESET, val);
42
43 /* wait to enter/exit reset */
44 timeout = jiffies + msecs_to_jiffies(HDA_DSP_CTRL_RESET_TIMEOUT);
45 while (time_before(jiffies, timeout)) {
46 gctl = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, SOF_HDA_GCTL);
47 if ((gctl & SOF_HDA_GCTL_RESET) == val)
48 return 0;
49 usleep_range(500, 1000);
50 }
51
52 /* enter/exit reset failed */
53 dev_err(sdev->dev, "error: failed to %s HDA controller gctl 0x%x\n",
54 reset ? "reset" : "ready", gctl);
55 return -EIO;
56 }
57
hda_dsp_ctrl_get_caps(struct snd_sof_dev * sdev)58 int hda_dsp_ctrl_get_caps(struct snd_sof_dev *sdev)
59 {
60 struct hdac_bus *bus = sof_to_bus(sdev);
61 u32 cap, offset, feature;
62 int count = 0;
63 int ret;
64
65 /*
66 * On some devices, one reset cycle is necessary before reading
67 * capabilities
68 */
69 ret = hda_dsp_ctrl_link_reset(sdev, true);
70 if (ret < 0)
71 return ret;
72 ret = hda_dsp_ctrl_link_reset(sdev, false);
73 if (ret < 0)
74 return ret;
75
76 offset = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, SOF_HDA_LLCH);
77
78 do {
79 dev_dbg(sdev->dev, "checking for capabilities at offset 0x%x\n",
80 offset & SOF_HDA_CAP_NEXT_MASK);
81
82 cap = snd_sof_dsp_read(sdev, HDA_DSP_HDA_BAR, offset);
83
84 if (cap == -1) {
85 dev_dbg(bus->dev, "Invalid capability reg read\n");
86 break;
87 }
88
89 feature = (cap & SOF_HDA_CAP_ID_MASK) >> SOF_HDA_CAP_ID_OFF;
90
91 switch (feature) {
92 case SOF_HDA_PP_CAP_ID:
93 dev_dbg(sdev->dev, "found DSP capability at 0x%x\n",
94 offset);
95 bus->ppcap = bus->remap_addr + offset;
96 sdev->bar[HDA_DSP_PP_BAR] = bus->ppcap;
97 break;
98 case SOF_HDA_SPIB_CAP_ID:
99 dev_dbg(sdev->dev, "found SPIB capability at 0x%x\n",
100 offset);
101 bus->spbcap = bus->remap_addr + offset;
102 sdev->bar[HDA_DSP_SPIB_BAR] = bus->spbcap;
103 break;
104 case SOF_HDA_DRSM_CAP_ID:
105 dev_dbg(sdev->dev, "found DRSM capability at 0x%x\n",
106 offset);
107 bus->drsmcap = bus->remap_addr + offset;
108 sdev->bar[HDA_DSP_DRSM_BAR] = bus->drsmcap;
109 break;
110 case SOF_HDA_GTS_CAP_ID:
111 dev_dbg(sdev->dev, "found GTS capability at 0x%x\n",
112 offset);
113 bus->gtscap = bus->remap_addr + offset;
114 break;
115 case SOF_HDA_ML_CAP_ID:
116 dev_dbg(sdev->dev, "found ML capability at 0x%x\n",
117 offset);
118 bus->mlcap = bus->remap_addr + offset;
119 break;
120 default:
121 dev_dbg(sdev->dev, "found capability %d at 0x%x\n",
122 feature, offset);
123 break;
124 }
125
126 offset = cap & SOF_HDA_CAP_NEXT_MASK;
127 } while (count++ <= SOF_HDA_MAX_CAPS && offset);
128
129 return 0;
130 }
131
hda_dsp_ctrl_ppcap_enable(struct snd_sof_dev * sdev,bool enable)132 void hda_dsp_ctrl_ppcap_enable(struct snd_sof_dev *sdev, bool enable)
133 {
134 u32 val = enable ? SOF_HDA_PPCTL_GPROCEN : 0;
135
136 snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
137 SOF_HDA_PPCTL_GPROCEN, val);
138 }
139
hda_dsp_ctrl_ppcap_int_enable(struct snd_sof_dev * sdev,bool enable)140 void hda_dsp_ctrl_ppcap_int_enable(struct snd_sof_dev *sdev, bool enable)
141 {
142 u32 val = enable ? SOF_HDA_PPCTL_PIE : 0;
143
144 snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR, SOF_HDA_REG_PP_PPCTL,
145 SOF_HDA_PPCTL_PIE, val);
146 }
147
hda_dsp_ctrl_misc_clock_gating(struct snd_sof_dev * sdev,bool enable)148 void hda_dsp_ctrl_misc_clock_gating(struct snd_sof_dev *sdev, bool enable)
149 {
150 u32 val = enable ? PCI_CGCTL_MISCBDCGE_MASK : 0;
151
152 snd_sof_pci_update_bits(sdev, PCI_CGCTL, PCI_CGCTL_MISCBDCGE_MASK, val);
153 }
154
155 /*
156 * enable/disable audio dsp clock gating and power gating bits.
157 * This allows the HW to opportunistically power and clock gate
158 * the audio dsp when it is idle
159 */
hda_dsp_ctrl_clock_power_gating(struct snd_sof_dev * sdev,bool enable)160 int hda_dsp_ctrl_clock_power_gating(struct snd_sof_dev *sdev, bool enable)
161 {
162 struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
163 u32 val;
164
165 /* enable/disable audio dsp clock gating */
166 val = enable ? PCI_CGCTL_ADSPDCGE : 0;
167 snd_sof_pci_update_bits(sdev, PCI_CGCTL, PCI_CGCTL_ADSPDCGE, val);
168
169 /* disable the DMI link when requested. But enable only if it wasn't disabled previously */
170 val = enable ? HDA_VS_INTEL_EM2_L1SEN : 0;
171 if (!enable || !hda->l1_disabled)
172 snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, HDA_VS_INTEL_EM2,
173 HDA_VS_INTEL_EM2_L1SEN, val);
174
175 /* enable/disable audio dsp power gating */
176 val = enable ? 0 : PCI_PGCTL_ADSPPGD;
177 snd_sof_pci_update_bits(sdev, PCI_PGCTL, PCI_PGCTL_ADSPPGD, val);
178
179 return 0;
180 }
181
hda_dsp_ctrl_init_chip(struct snd_sof_dev * sdev)182 int hda_dsp_ctrl_init_chip(struct snd_sof_dev *sdev)
183 {
184 struct hdac_bus *bus = sof_to_bus(sdev);
185 struct hdac_stream *stream;
186 int sd_offset, ret = 0;
187
188 if (bus->chip_init)
189 return 0;
190
191 hda_codec_set_codec_wakeup(sdev, true);
192
193 hda_dsp_ctrl_misc_clock_gating(sdev, false);
194
195 /* reset HDA controller */
196 ret = hda_dsp_ctrl_link_reset(sdev, true);
197 if (ret < 0) {
198 dev_err(sdev->dev, "error: failed to reset HDA controller\n");
199 goto err;
200 }
201
202 usleep_range(500, 1000);
203
204 /* exit HDA controller reset */
205 ret = hda_dsp_ctrl_link_reset(sdev, false);
206 if (ret < 0) {
207 dev_err(sdev->dev, "error: failed to exit HDA controller reset\n");
208 goto err;
209 }
210 usleep_range(1000, 1200);
211
212 hda_codec_detect_mask(sdev);
213
214 /* clear stream status */
215 list_for_each_entry(stream, &bus->stream_list, list) {
216 sd_offset = SOF_STREAM_SD_OFFSET(stream);
217 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
218 sd_offset + SOF_HDA_ADSP_REG_SD_STS,
219 SOF_HDA_CL_DMA_SD_INT_MASK);
220 }
221
222 /* clear WAKESTS */
223 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_WAKESTS,
224 SOF_HDA_WAKESTS_INT_MASK);
225
226 hda_codec_rirb_status_clear(sdev);
227
228 /* clear interrupt status register */
229 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTSTS,
230 SOF_HDA_INT_CTRL_EN | SOF_HDA_INT_ALL_STREAM);
231
232 hda_codec_init_cmd_io(sdev);
233
234 /* enable CIE and GIE interrupts */
235 snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTCTL,
236 SOF_HDA_INT_CTRL_EN | SOF_HDA_INT_GLOBAL_EN,
237 SOF_HDA_INT_CTRL_EN | SOF_HDA_INT_GLOBAL_EN);
238
239 /* program the position buffer */
240 if (bus->use_posbuf && bus->posbuf.addr) {
241 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_ADSP_DPLBASE,
242 (u32)bus->posbuf.addr);
243 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_ADSP_DPUBASE,
244 upper_32_bits(bus->posbuf.addr));
245 }
246
247 hda_bus_ml_reset_losidv(bus);
248
249 bus->chip_init = true;
250
251 err:
252 hda_dsp_ctrl_misc_clock_gating(sdev, true);
253
254 hda_codec_set_codec_wakeup(sdev, false);
255
256 return ret;
257 }
258
hda_dsp_ctrl_stop_chip(struct snd_sof_dev * sdev)259 void hda_dsp_ctrl_stop_chip(struct snd_sof_dev *sdev)
260 {
261 struct hdac_bus *bus = sof_to_bus(sdev);
262 struct hdac_stream *stream;
263 int sd_offset;
264
265 if (!bus->chip_init)
266 return;
267
268 /* disable interrupts in stream descriptor */
269 list_for_each_entry(stream, &bus->stream_list, list) {
270 sd_offset = SOF_STREAM_SD_OFFSET(stream);
271 snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR,
272 sd_offset +
273 SOF_HDA_ADSP_REG_SD_CTL,
274 SOF_HDA_CL_DMA_SD_INT_MASK,
275 0);
276 }
277
278 /* disable SIE for all streams */
279 snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTCTL,
280 SOF_HDA_INT_ALL_STREAM, 0);
281
282 /* disable controller CIE and GIE */
283 snd_sof_dsp_update_bits(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTCTL,
284 SOF_HDA_INT_CTRL_EN | SOF_HDA_INT_GLOBAL_EN,
285 0);
286
287 /* clear stream status */
288 list_for_each_entry(stream, &bus->stream_list, list) {
289 sd_offset = SOF_STREAM_SD_OFFSET(stream);
290 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
291 sd_offset + SOF_HDA_ADSP_REG_SD_STS,
292 SOF_HDA_CL_DMA_SD_INT_MASK);
293 }
294
295 /* clear WAKESTS */
296 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_WAKESTS,
297 SOF_HDA_WAKESTS_INT_MASK);
298
299 hda_codec_rirb_status_clear(sdev);
300
301 /* clear interrupt status register */
302 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR, SOF_HDA_INTSTS,
303 SOF_HDA_INT_CTRL_EN | SOF_HDA_INT_ALL_STREAM);
304
305 hda_codec_stop_cmd_io(sdev);
306
307 /* disable position buffer */
308 if (bus->use_posbuf && bus->posbuf.addr) {
309 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
310 SOF_HDA_ADSP_DPLBASE, 0);
311 snd_sof_dsp_write(sdev, HDA_DSP_HDA_BAR,
312 SOF_HDA_ADSP_DPUBASE, 0);
313 }
314
315 bus->chip_init = false;
316 }
317