1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. 4 * 5 * lpass-apq8016.c -- ALSA SoC CPU DAI driver for APQ8016 LPASS 6 */ 7 8 9 #include <linux/clk.h> 10 #include <linux/device.h> 11 #include <linux/err.h> 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/of.h> 15 #include <linux/platform_device.h> 16 #include <sound/pcm.h> 17 #include <sound/pcm_params.h> 18 #include <sound/soc.h> 19 #include <sound/soc-dai.h> 20 21 #include <dt-bindings/sound/apq8016-lpass.h> 22 #include "lpass-lpaif-reg.h" 23 #include "lpass.h" 24 25 static struct snd_soc_dai_driver apq8016_lpass_cpu_dai_driver[] = { 26 [MI2S_PRIMARY] = { 27 .id = MI2S_PRIMARY, 28 .name = "Primary MI2S", 29 .playback = { 30 .stream_name = "Primary Playback", 31 .formats = SNDRV_PCM_FMTBIT_S16 | 32 SNDRV_PCM_FMTBIT_S24 | 33 SNDRV_PCM_FMTBIT_S32, 34 .rates = SNDRV_PCM_RATE_8000 | 35 SNDRV_PCM_RATE_16000 | 36 SNDRV_PCM_RATE_32000 | 37 SNDRV_PCM_RATE_48000 | 38 SNDRV_PCM_RATE_96000, 39 .rate_min = 8000, 40 .rate_max = 96000, 41 .channels_min = 1, 42 .channels_max = 8, 43 }, 44 .probe = &asoc_qcom_lpass_cpu_dai_probe, 45 .ops = &asoc_qcom_lpass_cpu_dai_ops, 46 }, 47 [MI2S_SECONDARY] = { 48 .id = MI2S_SECONDARY, 49 .name = "Secondary MI2S", 50 .playback = { 51 .stream_name = "Secondary Playback", 52 .formats = SNDRV_PCM_FMTBIT_S16 | 53 SNDRV_PCM_FMTBIT_S24 | 54 SNDRV_PCM_FMTBIT_S32, 55 .rates = SNDRV_PCM_RATE_8000 | 56 SNDRV_PCM_RATE_16000 | 57 SNDRV_PCM_RATE_32000 | 58 SNDRV_PCM_RATE_48000 | 59 SNDRV_PCM_RATE_96000, 60 .rate_min = 8000, 61 .rate_max = 96000, 62 .channels_min = 1, 63 .channels_max = 8, 64 }, 65 .probe = &asoc_qcom_lpass_cpu_dai_probe, 66 .ops = &asoc_qcom_lpass_cpu_dai_ops, 67 }, 68 [MI2S_TERTIARY] = { 69 .id = MI2S_TERTIARY, 70 .name = "Tertiary MI2S", 71 .capture = { 72 .stream_name = "Tertiary Capture", 73 .formats = SNDRV_PCM_FMTBIT_S16 | 74 SNDRV_PCM_FMTBIT_S24 | 75 SNDRV_PCM_FMTBIT_S32, 76 .rates = SNDRV_PCM_RATE_8000 | 77 SNDRV_PCM_RATE_16000 | 78 SNDRV_PCM_RATE_32000 | 79 SNDRV_PCM_RATE_48000 | 80 SNDRV_PCM_RATE_96000, 81 .rate_min = 8000, 82 .rate_max = 96000, 83 .channels_min = 1, 84 .channels_max = 8, 85 }, 86 .probe = &asoc_qcom_lpass_cpu_dai_probe, 87 .ops = &asoc_qcom_lpass_cpu_dai_ops, 88 }, 89 [MI2S_QUATERNARY] = { 90 .id = MI2S_QUATERNARY, 91 .name = "Quatenary MI2S", 92 .playback = { 93 .stream_name = "Quatenary Playback", 94 .formats = SNDRV_PCM_FMTBIT_S16 | 95 SNDRV_PCM_FMTBIT_S24 | 96 SNDRV_PCM_FMTBIT_S32, 97 .rates = SNDRV_PCM_RATE_8000 | 98 SNDRV_PCM_RATE_16000 | 99 SNDRV_PCM_RATE_32000 | 100 SNDRV_PCM_RATE_48000 | 101 SNDRV_PCM_RATE_96000, 102 .rate_min = 8000, 103 .rate_max = 96000, 104 .channels_min = 1, 105 .channels_max = 8, 106 }, 107 .capture = { 108 .stream_name = "Quatenary Capture", 109 .formats = SNDRV_PCM_FMTBIT_S16 | 110 SNDRV_PCM_FMTBIT_S24 | 111 SNDRV_PCM_FMTBIT_S32, 112 .rates = SNDRV_PCM_RATE_8000 | 113 SNDRV_PCM_RATE_16000 | 114 SNDRV_PCM_RATE_32000 | 115 SNDRV_PCM_RATE_48000 | 116 SNDRV_PCM_RATE_96000, 117 .rate_min = 8000, 118 .rate_max = 96000, 119 .channels_min = 1, 120 .channels_max = 8, 121 }, 122 .probe = &asoc_qcom_lpass_cpu_dai_probe, 123 .ops = &asoc_qcom_lpass_cpu_dai_ops, 124 }, 125 }; 126 127 static int apq8016_lpass_alloc_dma_channel(struct lpass_data *drvdata, 128 int direction, unsigned int dai_id) 129 { 130 struct lpass_variant *v = drvdata->variant; 131 int chan = 0; 132 133 if (direction == SNDRV_PCM_STREAM_PLAYBACK) { 134 chan = find_first_zero_bit(&drvdata->dma_ch_bit_map, 135 v->rdma_channels); 136 137 if (chan >= v->rdma_channels) 138 return -EBUSY; 139 } else { 140 chan = find_next_zero_bit(&drvdata->dma_ch_bit_map, 141 v->wrdma_channel_start + 142 v->wrdma_channels, 143 v->wrdma_channel_start); 144 145 if (chan >= v->wrdma_channel_start + v->wrdma_channels) 146 return -EBUSY; 147 } 148 149 set_bit(chan, &drvdata->dma_ch_bit_map); 150 151 return chan; 152 } 153 154 static int apq8016_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id) 155 { 156 clear_bit(chan, &drvdata->dma_ch_bit_map); 157 158 return 0; 159 } 160 161 static int apq8016_lpass_init(struct platform_device *pdev) 162 { 163 struct lpass_data *drvdata = platform_get_drvdata(pdev); 164 struct lpass_variant *variant = drvdata->variant; 165 struct device *dev = &pdev->dev; 166 int ret, i; 167 168 169 drvdata->clks = devm_kcalloc(dev, variant->num_clks, 170 sizeof(*drvdata->clks), GFP_KERNEL); 171 if (!drvdata->clks) 172 return -ENOMEM; 173 drvdata->num_clks = variant->num_clks; 174 175 for (i = 0; i < drvdata->num_clks; i++) 176 drvdata->clks[i].id = variant->clk_name[i]; 177 178 ret = devm_clk_bulk_get(dev, drvdata->num_clks, drvdata->clks); 179 if (ret) { 180 dev_err(dev, "Failed to get clocks %d\n", ret); 181 return ret; 182 } 183 184 ret = clk_bulk_prepare_enable(drvdata->num_clks, drvdata->clks); 185 if (ret) { 186 dev_err(dev, "apq8016 clk_enable failed\n"); 187 return ret; 188 } 189 190 drvdata->ahbix_clk = devm_clk_get(dev, "ahbix-clk"); 191 if (IS_ERR(drvdata->ahbix_clk)) { 192 dev_err(dev, "error getting ahbix-clk: %ld\n", 193 PTR_ERR(drvdata->ahbix_clk)); 194 ret = PTR_ERR(drvdata->ahbix_clk); 195 goto err_ahbix_clk; 196 } 197 198 ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY); 199 if (ret) { 200 dev_err(dev, "error setting rate on ahbix_clk: %d\n", ret); 201 goto err_ahbix_clk; 202 } 203 dev_dbg(dev, "set ahbix_clk rate to %lu\n", 204 clk_get_rate(drvdata->ahbix_clk)); 205 206 ret = clk_prepare_enable(drvdata->ahbix_clk); 207 if (ret) { 208 dev_err(dev, "error enabling ahbix_clk: %d\n", ret); 209 goto err_ahbix_clk; 210 } 211 212 return 0; 213 214 err_ahbix_clk: 215 clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks); 216 return ret; 217 } 218 219 static int apq8016_lpass_exit(struct platform_device *pdev) 220 { 221 struct lpass_data *drvdata = platform_get_drvdata(pdev); 222 223 clk_bulk_disable_unprepare(drvdata->num_clks, drvdata->clks); 224 clk_disable_unprepare(drvdata->ahbix_clk); 225 226 return 0; 227 } 228 229 230 static struct lpass_variant apq8016_data = { 231 .i2sctrl_reg_base = 0x1000, 232 .i2sctrl_reg_stride = 0x1000, 233 .i2s_ports = 4, 234 .irq_reg_base = 0x6000, 235 .irq_reg_stride = 0x1000, 236 .irq_ports = 3, 237 .rdma_reg_base = 0x8400, 238 .rdma_reg_stride = 0x1000, 239 .rdma_channels = 2, 240 .dmactl_audif_start = 1, 241 .wrdma_reg_base = 0xB000, 242 .wrdma_reg_stride = 0x1000, 243 .wrdma_channel_start = 5, 244 .wrdma_channels = 2, 245 .loopback = REG_FIELD_ID(0x1000, 15, 15, 4, 0x1000), 246 .spken = REG_FIELD_ID(0x1000, 14, 14, 4, 0x1000), 247 .spkmode = REG_FIELD_ID(0x1000, 10, 13, 4, 0x1000), 248 .spkmono = REG_FIELD_ID(0x1000, 9, 9, 4, 0x1000), 249 .micen = REG_FIELD_ID(0x1000, 8, 8, 4, 0x1000), 250 .micmode = REG_FIELD_ID(0x1000, 4, 7, 4, 0x1000), 251 .micmono = REG_FIELD_ID(0x1000, 3, 3, 4, 0x1000), 252 .wssrc = REG_FIELD_ID(0x1000, 2, 2, 4, 0x1000), 253 .bitwidth = REG_FIELD_ID(0x1000, 0, 1, 4, 0x1000), 254 255 .rdma_dyncclk = REG_FIELD_ID(0x8400, 12, 12, 2, 0x1000), 256 .rdma_bursten = REG_FIELD_ID(0x8400, 11, 11, 2, 0x1000), 257 .rdma_wpscnt = REG_FIELD_ID(0x8400, 8, 10, 2, 0x1000), 258 .rdma_intf = REG_FIELD_ID(0x8400, 4, 7, 2, 0x1000), 259 .rdma_fifowm = REG_FIELD_ID(0x8400, 1, 3, 2, 0x1000), 260 .rdma_enable = REG_FIELD_ID(0x8400, 0, 0, 2, 0x1000), 261 262 .wrdma_dyncclk = REG_FIELD_ID(0xB000, 12, 12, 2, 0x1000), 263 .wrdma_bursten = REG_FIELD_ID(0xB000, 11, 11, 2, 0x1000), 264 .wrdma_wpscnt = REG_FIELD_ID(0xB000, 8, 10, 2, 0x1000), 265 .wrdma_intf = REG_FIELD_ID(0xB000, 4, 7, 2, 0x1000), 266 .wrdma_fifowm = REG_FIELD_ID(0xB000, 1, 3, 2, 0x1000), 267 .wrdma_enable = REG_FIELD_ID(0xB000, 0, 0, 2, 0x1000), 268 269 .clk_name = (const char*[]) { 270 "pcnoc-mport-clk", 271 "pcnoc-sway-clk", 272 }, 273 .num_clks = 2, 274 .dai_driver = apq8016_lpass_cpu_dai_driver, 275 .num_dai = ARRAY_SIZE(apq8016_lpass_cpu_dai_driver), 276 .dai_osr_clk_names = (const char *[]) { 277 "mi2s-osr-clk0", 278 "mi2s-osr-clk1", 279 "mi2s-osr-clk2", 280 "mi2s-osr-clk3", 281 }, 282 .dai_bit_clk_names = (const char *[]) { 283 "mi2s-bit-clk0", 284 "mi2s-bit-clk1", 285 "mi2s-bit-clk2", 286 "mi2s-bit-clk3", 287 }, 288 .init = apq8016_lpass_init, 289 .exit = apq8016_lpass_exit, 290 .alloc_dma_channel = apq8016_lpass_alloc_dma_channel, 291 .free_dma_channel = apq8016_lpass_free_dma_channel, 292 }; 293 294 static const struct of_device_id apq8016_lpass_cpu_device_id[] __maybe_unused = { 295 { .compatible = "qcom,lpass-cpu-apq8016", .data = &apq8016_data }, 296 {} 297 }; 298 MODULE_DEVICE_TABLE(of, apq8016_lpass_cpu_device_id); 299 300 static struct platform_driver apq8016_lpass_cpu_platform_driver = { 301 .driver = { 302 .name = "apq8016-lpass-cpu", 303 .of_match_table = of_match_ptr(apq8016_lpass_cpu_device_id), 304 }, 305 .probe = asoc_qcom_lpass_cpu_platform_probe, 306 .remove = asoc_qcom_lpass_cpu_platform_remove, 307 }; 308 module_platform_driver(apq8016_lpass_cpu_platform_driver); 309 310 MODULE_DESCRIPTION("APQ8016 LPASS CPU Driver"); 311 MODULE_LICENSE("GPL v2"); 312 313