1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * kirkwood-dma.c 3 * kirkwood-dma.c
4 * 4 *
5 * (c) 2010 Arnaud Patard <apatard@mandriva.co 5 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
6 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-n 6 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
7 */ 7 */
8 8
9 #include <linux/init.h> 9 #include <linux/init.h>
10 #include <linux/module.h> 10 #include <linux/module.h>
11 #include <linux/device.h> 11 #include <linux/device.h>
12 #include <linux/io.h> 12 #include <linux/io.h>
13 #include <linux/slab.h> 13 #include <linux/slab.h>
14 #include <linux/interrupt.h> 14 #include <linux/interrupt.h>
15 #include <linux/dma-mapping.h> 15 #include <linux/dma-mapping.h>
16 #include <linux/mbus.h> 16 #include <linux/mbus.h>
17 #include <sound/soc.h> 17 #include <sound/soc.h>
18 #include "kirkwood.h" 18 #include "kirkwood.h"
19 19
20 static struct kirkwood_dma_data *kirkwood_priv 20 static struct kirkwood_dma_data *kirkwood_priv(struct snd_pcm_substream *subs)
21 { 21 {
22 struct snd_soc_pcm_runtime *soc_runtim !! 22 struct snd_soc_pcm_runtime *soc_runtime = subs->private_data;
23 return snd_soc_dai_get_drvdata(snd_soc !! 23 return snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(soc_runtime, 0));
24 } 24 }
25 25
26 static const struct snd_pcm_hardware kirkwood_ 26 static const struct snd_pcm_hardware kirkwood_dma_snd_hw = {
27 .info = SNDRV_PCM_INFO_INTERLEAVED | 27 .info = SNDRV_PCM_INFO_INTERLEAVED |
28 SNDRV_PCM_INFO_MMAP | 28 SNDRV_PCM_INFO_MMAP |
29 SNDRV_PCM_INFO_MMAP_VALID | 29 SNDRV_PCM_INFO_MMAP_VALID |
30 SNDRV_PCM_INFO_BLOCK_TRANSFER 30 SNDRV_PCM_INFO_BLOCK_TRANSFER |
31 SNDRV_PCM_INFO_PAUSE | 31 SNDRV_PCM_INFO_PAUSE |
32 SNDRV_PCM_INFO_NO_PERIOD_WAKEU 32 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
33 .buffer_bytes_max = KIRKWOOD_SND 33 .buffer_bytes_max = KIRKWOOD_SND_MAX_BUFFER_BYTES,
34 .period_bytes_min = KIRKWOOD_SND 34 .period_bytes_min = KIRKWOOD_SND_MIN_PERIOD_BYTES,
35 .period_bytes_max = KIRKWOOD_SND 35 .period_bytes_max = KIRKWOOD_SND_MAX_PERIOD_BYTES,
36 .periods_min = KIRKWOOD_SND 36 .periods_min = KIRKWOOD_SND_MIN_PERIODS,
37 .periods_max = KIRKWOOD_SND 37 .periods_max = KIRKWOOD_SND_MAX_PERIODS,
38 .fifo_size = 0, 38 .fifo_size = 0,
39 }; 39 };
40 40
41 static irqreturn_t kirkwood_dma_irq(int irq, v 41 static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
42 { 42 {
43 struct kirkwood_dma_data *priv = dev_i 43 struct kirkwood_dma_data *priv = dev_id;
44 unsigned long mask, status, cause; 44 unsigned long mask, status, cause;
45 45
46 mask = readl(priv->io + KIRKWOOD_INT_M 46 mask = readl(priv->io + KIRKWOOD_INT_MASK);
47 status = readl(priv->io + KIRKWOOD_INT 47 status = readl(priv->io + KIRKWOOD_INT_CAUSE) & mask;
48 48
49 cause = readl(priv->io + KIRKWOOD_ERR_ 49 cause = readl(priv->io + KIRKWOOD_ERR_CAUSE);
50 if (unlikely(cause)) { 50 if (unlikely(cause)) {
51 printk(KERN_WARNING "%s: got e 51 printk(KERN_WARNING "%s: got err interrupt 0x%lx\n",
52 __func__, caus 52 __func__, cause);
53 writel(cause, priv->io + KIRKW 53 writel(cause, priv->io + KIRKWOOD_ERR_CAUSE);
54 } 54 }
55 55
56 /* we've enabled only bytes interrupts 56 /* we've enabled only bytes interrupts ... */
57 if (status & ~(KIRKWOOD_INT_CAUSE_PLAY 57 if (status & ~(KIRKWOOD_INT_CAUSE_PLAY_BYTES | \
58 KIRKWOOD_INT_CAUSE_REC 58 KIRKWOOD_INT_CAUSE_REC_BYTES)) {
59 printk(KERN_WARNING "%s: unexp 59 printk(KERN_WARNING "%s: unexpected interrupt %lx\n",
60 __func__, status); 60 __func__, status);
61 return IRQ_NONE; 61 return IRQ_NONE;
62 } 62 }
63 63
64 /* ack int */ 64 /* ack int */
65 writel(status, priv->io + KIRKWOOD_INT 65 writel(status, priv->io + KIRKWOOD_INT_CAUSE);
66 66
67 if (status & KIRKWOOD_INT_CAUSE_PLAY_B 67 if (status & KIRKWOOD_INT_CAUSE_PLAY_BYTES)
68 snd_pcm_period_elapsed(priv->s 68 snd_pcm_period_elapsed(priv->substream_play);
69 69
70 if (status & KIRKWOOD_INT_CAUSE_REC_BY 70 if (status & KIRKWOOD_INT_CAUSE_REC_BYTES)
71 snd_pcm_period_elapsed(priv->s 71 snd_pcm_period_elapsed(priv->substream_rec);
72 72
73 return IRQ_HANDLED; 73 return IRQ_HANDLED;
74 } 74 }
75 75
76 static void 76 static void
77 kirkwood_dma_conf_mbus_windows(void __iomem *b 77 kirkwood_dma_conf_mbus_windows(void __iomem *base, int win,
78 unsigned long d 78 unsigned long dma,
79 const struct mb 79 const struct mbus_dram_target_info *dram)
80 { 80 {
81 int i; 81 int i;
82 82
83 /* First disable and clear windows */ 83 /* First disable and clear windows */
84 writel(0, base + KIRKWOOD_AUDIO_WIN_CT 84 writel(0, base + KIRKWOOD_AUDIO_WIN_CTRL_REG(win));
85 writel(0, base + KIRKWOOD_AUDIO_WIN_BA 85 writel(0, base + KIRKWOOD_AUDIO_WIN_BASE_REG(win));
86 86
87 /* try to find matching cs for current 87 /* try to find matching cs for current dma address */
88 for (i = 0; i < dram->num_cs; i++) { 88 for (i = 0; i < dram->num_cs; i++) {
89 const struct mbus_dram_window !! 89 const struct mbus_dram_window *cs = dram->cs + i;
90 if ((cs->base & 0xffff0000) < 90 if ((cs->base & 0xffff0000) < (dma & 0xffff0000)) {
91 writel(cs->base & 0xff 91 writel(cs->base & 0xffff0000,
92 base + KIRKWOO 92 base + KIRKWOOD_AUDIO_WIN_BASE_REG(win));
93 writel(((cs->size - 1) 93 writel(((cs->size - 1) & 0xffff0000) |
94 (cs->mbus_attr 94 (cs->mbus_attr << 8) |
95 (dram->mbus_dr 95 (dram->mbus_dram_target_id << 4) | 1,
96 base + KIRKWOO 96 base + KIRKWOOD_AUDIO_WIN_CTRL_REG(win));
97 } 97 }
98 } 98 }
99 } 99 }
100 100
101 static int kirkwood_dma_open(struct snd_soc_co 101 static int kirkwood_dma_open(struct snd_soc_component *component,
102 struct snd_pcm_su 102 struct snd_pcm_substream *substream)
103 { 103 {
104 int err; 104 int err;
105 struct snd_pcm_runtime *runtime = subs 105 struct snd_pcm_runtime *runtime = substream->runtime;
106 struct kirkwood_dma_data *priv = kirkw 106 struct kirkwood_dma_data *priv = kirkwood_priv(substream);
107 107
108 snd_soc_set_runtime_hwparams(substream 108 snd_soc_set_runtime_hwparams(substream, &kirkwood_dma_snd_hw);
109 109
110 /* Ensure that all constraints linked 110 /* Ensure that all constraints linked to dma burst are fulfilled */
111 err = snd_pcm_hw_constraint_minmax(run 111 err = snd_pcm_hw_constraint_minmax(runtime,
112 SNDRV_PCM_HW_PARAM_BUF 112 SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
113 priv->burst * 2, 113 priv->burst * 2,
114 KIRKWOOD_AUDIO_BUF_MAX 114 KIRKWOOD_AUDIO_BUF_MAX-1);
115 if (err < 0) 115 if (err < 0)
116 return err; 116 return err;
117 117
118 err = snd_pcm_hw_constraint_step(runti 118 err = snd_pcm_hw_constraint_step(runtime, 0,
119 SNDRV_PCM_HW_PARAM_BUF 119 SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
120 priv->burst); 120 priv->burst);
121 if (err < 0) 121 if (err < 0)
122 return err; 122 return err;
123 123
124 err = snd_pcm_hw_constraint_step(subst 124 err = snd_pcm_hw_constraint_step(substream->runtime, 0,
125 SNDRV_PCM_HW_PARAM_PE 125 SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
126 priv->burst); 126 priv->burst);
127 if (err < 0) 127 if (err < 0)
128 return err; 128 return err;
129 129
130 if (!priv->substream_play && !priv->su 130 if (!priv->substream_play && !priv->substream_rec) {
131 err = request_irq(priv->irq, k 131 err = request_irq(priv->irq, kirkwood_dma_irq, IRQF_SHARED,
132 "kirkwood-i2 132 "kirkwood-i2s", priv);
133 if (err) 133 if (err)
134 return err; 134 return err;
135 135
136 /* 136 /*
137 * Enable Error interrupts. We 137 * Enable Error interrupts. We're only ack'ing them but
138 * it's useful for diagnostics 138 * it's useful for diagnostics
139 */ 139 */
140 writel((unsigned int)-1, priv- 140 writel((unsigned int)-1, priv->io + KIRKWOOD_ERR_MASK);
141 } 141 }
142 142
143 if (substream->stream == SNDRV_PCM_STR 143 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
144 if (priv->substream_play) 144 if (priv->substream_play)
145 return -EBUSY; 145 return -EBUSY;
146 priv->substream_play = substre 146 priv->substream_play = substream;
147 } else { 147 } else {
148 if (priv->substream_rec) 148 if (priv->substream_rec)
149 return -EBUSY; 149 return -EBUSY;
150 priv->substream_rec = substrea 150 priv->substream_rec = substream;
151 } 151 }
152 152
153 return 0; 153 return 0;
154 } 154 }
155 155
156 static int kirkwood_dma_close(struct snd_soc_c 156 static int kirkwood_dma_close(struct snd_soc_component *component,
157 struct snd_pcm_s 157 struct snd_pcm_substream *substream)
158 { 158 {
159 struct kirkwood_dma_data *priv = kirkw 159 struct kirkwood_dma_data *priv = kirkwood_priv(substream);
160 160
161 if (!priv) 161 if (!priv)
162 return 0; 162 return 0;
163 163
164 if (substream->stream == SNDRV_PCM_STR 164 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
165 priv->substream_play = NULL; 165 priv->substream_play = NULL;
166 else 166 else
167 priv->substream_rec = NULL; 167 priv->substream_rec = NULL;
168 168
169 if (!priv->substream_play && !priv->su 169 if (!priv->substream_play && !priv->substream_rec) {
170 writel(0, priv->io + KIRKWOOD_ 170 writel(0, priv->io + KIRKWOOD_ERR_MASK);
171 free_irq(priv->irq, priv); 171 free_irq(priv->irq, priv);
172 } 172 }
173 173
174 return 0; 174 return 0;
175 } 175 }
176 176
177 static int kirkwood_dma_hw_params(struct snd_s 177 static int kirkwood_dma_hw_params(struct snd_soc_component *component,
178 struct snd_p 178 struct snd_pcm_substream *substream,
179 struct snd_p 179 struct snd_pcm_hw_params *params)
180 { 180 {
181 struct kirkwood_dma_data *priv = kirkw 181 struct kirkwood_dma_data *priv = kirkwood_priv(substream);
182 const struct mbus_dram_target_info *dr 182 const struct mbus_dram_target_info *dram = mv_mbus_dram_info();
183 unsigned long addr = substream->runtim 183 unsigned long addr = substream->runtime->dma_addr;
184 <<
185 if (!dram) <<
186 return 0; <<
187 184
188 if (substream->stream == SNDRV_PCM_STR 185 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
189 kirkwood_dma_conf_mbus_windows 186 kirkwood_dma_conf_mbus_windows(priv->io,
190 KIRKWOOD_PLAYBACK_WIN, 187 KIRKWOOD_PLAYBACK_WIN, addr, dram);
191 else 188 else
192 kirkwood_dma_conf_mbus_windows 189 kirkwood_dma_conf_mbus_windows(priv->io,
193 KIRKWOOD_RECORD_WIN, a 190 KIRKWOOD_RECORD_WIN, addr, dram);
194 return 0; 191 return 0;
195 } 192 }
196 193
197 static int kirkwood_dma_prepare(struct snd_soc 194 static int kirkwood_dma_prepare(struct snd_soc_component *component,
198 struct snd_pcm 195 struct snd_pcm_substream *substream)
199 { 196 {
200 struct snd_pcm_runtime *runtime = subs 197 struct snd_pcm_runtime *runtime = substream->runtime;
201 struct kirkwood_dma_data *priv = kirkw 198 struct kirkwood_dma_data *priv = kirkwood_priv(substream);
202 unsigned long size, count; 199 unsigned long size, count;
203 200
204 /* compute buffer size in term of "wor 201 /* compute buffer size in term of "words" as requested in specs */
205 size = frames_to_bytes(runtime, runtim 202 size = frames_to_bytes(runtime, runtime->buffer_size);
206 size = (size>>2)-1; 203 size = (size>>2)-1;
207 count = snd_pcm_lib_period_bytes(subst 204 count = snd_pcm_lib_period_bytes(substream);
208 205
209 if (substream->stream == SNDRV_PCM_STR 206 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
210 writel(count, priv->io + KIRKW 207 writel(count, priv->io + KIRKWOOD_PLAY_BYTE_INT_COUNT);
211 writel(runtime->dma_addr, priv 208 writel(runtime->dma_addr, priv->io + KIRKWOOD_PLAY_BUF_ADDR);
212 writel(size, priv->io + KIRKWO 209 writel(size, priv->io + KIRKWOOD_PLAY_BUF_SIZE);
213 } else { 210 } else {
214 writel(count, priv->io + KIRKW 211 writel(count, priv->io + KIRKWOOD_REC_BYTE_INT_COUNT);
215 writel(runtime->dma_addr, priv 212 writel(runtime->dma_addr, priv->io + KIRKWOOD_REC_BUF_ADDR);
216 writel(size, priv->io + KIRKWO 213 writel(size, priv->io + KIRKWOOD_REC_BUF_SIZE);
217 } 214 }
218 215
219 216
220 return 0; 217 return 0;
221 } 218 }
222 219
223 static snd_pcm_uframes_t kirkwood_dma_pointer( 220 static snd_pcm_uframes_t kirkwood_dma_pointer(
224 struct snd_soc_component *component, 221 struct snd_soc_component *component,
225 struct snd_pcm_substream *substream) 222 struct snd_pcm_substream *substream)
226 { 223 {
227 struct kirkwood_dma_data *priv = kirkw 224 struct kirkwood_dma_data *priv = kirkwood_priv(substream);
228 snd_pcm_uframes_t count; 225 snd_pcm_uframes_t count;
229 226
230 if (substream->stream == SNDRV_PCM_STR 227 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
231 count = bytes_to_frames(substr 228 count = bytes_to_frames(substream->runtime,
232 readl(priv->io + KIRKW 229 readl(priv->io + KIRKWOOD_PLAY_BYTE_COUNT));
233 else 230 else
234 count = bytes_to_frames(substr 231 count = bytes_to_frames(substream->runtime,
235 readl(priv->io + KIRKW 232 readl(priv->io + KIRKWOOD_REC_BYTE_COUNT));
236 233
237 return count; 234 return count;
238 } 235 }
239 236
240 static int kirkwood_dma_new(struct snd_soc_com 237 static int kirkwood_dma_new(struct snd_soc_component *component,
241 struct snd_soc_pcm 238 struct snd_soc_pcm_runtime *rtd)
242 { 239 {
243 size_t size = kirkwood_dma_snd_hw.buff 240 size_t size = kirkwood_dma_snd_hw.buffer_bytes_max;
244 struct snd_card *card = rtd->card->snd 241 struct snd_card *card = rtd->card->snd_card;
245 int ret; 242 int ret;
246 243
247 ret = dma_coerce_mask_and_coherent(car 244 ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
248 if (ret) 245 if (ret)
249 return ret; 246 return ret;
250 247
251 snd_pcm_set_managed_buffer_all(rtd->pc 248 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
252 card->d 249 card->dev, size, size);
253 250
254 return 0; 251 return 0;
255 } 252 }
256 253
257 const struct snd_soc_component_driver kirkwood 254 const struct snd_soc_component_driver kirkwood_soc_component = {
258 .name = DRV_NAME, 255 .name = DRV_NAME,
259 .open = kirkwood_dma_open, 256 .open = kirkwood_dma_open,
260 .close = kirkwood_dma_close, 257 .close = kirkwood_dma_close,
261 .hw_params = kirkwood_dma_hw_para 258 .hw_params = kirkwood_dma_hw_params,
262 .prepare = kirkwood_dma_prepare 259 .prepare = kirkwood_dma_prepare,
263 .pointer = kirkwood_dma_pointer 260 .pointer = kirkwood_dma_pointer,
264 .pcm_construct = kirkwood_dma_new, 261 .pcm_construct = kirkwood_dma_new,
265 }; 262 };
266 263
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