Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 1 | /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/of.h> |
| 18 | #include <linux/clk.h> |
| 19 | #include <linux/clk-provider.h> |
| 20 | #include "../../../drivers/clk/qcom/common.h" |
| 21 | #include <linux/platform_device.h> |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 22 | #include <dt-bindings/clock/qcom,audio-ext-clk.h> |
Laxminath Kasam | 605b42f | 2017-08-01 22:02:15 +0530 | [diff] [blame] | 23 | #include <dsp/q6afe-v2.h> |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 24 | #include "audio-ext-clk-up.h" |
| 25 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 26 | enum { |
| 27 | AUDIO_EXT_CLK_PMI, |
| 28 | AUDIO_EXT_CLK_LNBB2, |
| 29 | AUDIO_EXT_CLK_LPASS, |
| 30 | AUDIO_EXT_CLK_MAX, |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 31 | }; |
| 32 | |
| 33 | struct pinctrl_info { |
| 34 | struct pinctrl *pinctrl; |
| 35 | struct pinctrl_state *sleep; |
| 36 | struct pinctrl_state *active; |
| 37 | char __iomem *base; |
| 38 | }; |
| 39 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 40 | struct audio_ext_clk { |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 41 | struct pinctrl_info pnctrl_info; |
| 42 | struct clk_fixed_factor fact; |
| 43 | }; |
| 44 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 45 | struct audio_ext_clk_priv { |
| 46 | struct device *dev; |
| 47 | int clk_src; |
| 48 | struct afe_clk_set clk_cfg; |
| 49 | struct audio_ext_clk audio_clk; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 50 | }; |
| 51 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 52 | static inline struct audio_ext_clk_priv *to_audio_clk(struct clk_hw *hw) |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 53 | { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 54 | return container_of(hw, struct audio_ext_clk_priv, audio_clk.fact.hw); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | static int audio_ext_clk_prepare(struct clk_hw *hw) |
| 58 | { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 59 | struct audio_ext_clk_priv *clk_priv = to_audio_clk(hw); |
| 60 | struct pinctrl_info *pnctrl_info = &clk_priv->audio_clk.pnctrl_info; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 61 | int ret; |
| 62 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 63 | if (clk_priv->clk_src == AUDIO_EXT_CLK_LPASS) { |
| 64 | clk_priv->clk_cfg.enable = 1; |
| 65 | ret = afe_set_lpass_clk_cfg(IDX_RSVD_3, &clk_priv->clk_cfg); |
| 66 | if (ret < 0) { |
| 67 | pr_err("%s afe_set_digital_codec_core_clock failed\n", |
| 68 | __func__); |
| 69 | return ret; |
| 70 | } |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | if (pnctrl_info->pinctrl) { |
| 74 | ret = pinctrl_select_state(pnctrl_info->pinctrl, |
| 75 | pnctrl_info->active); |
| 76 | if (ret) { |
| 77 | pr_err("%s: active state select failed with %d\n", |
| 78 | __func__, ret); |
| 79 | return -EIO; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | if (pnctrl_info->base) |
| 84 | iowrite32(1, pnctrl_info->base); |
| 85 | return 0; |
| 86 | } |
| 87 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 88 | static void audio_ext_clk_unprepare(struct clk_hw *hw) |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 89 | { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 90 | struct audio_ext_clk_priv *clk_priv = to_audio_clk(hw); |
| 91 | struct pinctrl_info *pnctrl_info = &clk_priv->audio_clk.pnctrl_info; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 92 | int ret; |
| 93 | |
| 94 | if (pnctrl_info->pinctrl) { |
| 95 | ret = pinctrl_select_state(pnctrl_info->pinctrl, |
| 96 | pnctrl_info->sleep); |
| 97 | if (ret) { |
| 98 | pr_err("%s: active state select failed with %d\n", |
| 99 | __func__, ret); |
| 100 | return; |
| 101 | } |
| 102 | } |
| 103 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 104 | if (clk_priv->clk_src == AUDIO_EXT_CLK_LPASS) { |
| 105 | clk_priv->clk_cfg.enable = 0; |
| 106 | ret = afe_set_lpass_clk_cfg(IDX_RSVD_3, &clk_priv->clk_cfg); |
| 107 | if (ret < 0) |
| 108 | pr_err("%s: afe_set_lpass_clk_cfg failed, ret = %d\n", |
| 109 | __func__, ret); |
| 110 | } |
| 111 | |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 112 | if (pnctrl_info->base) |
| 113 | iowrite32(0, pnctrl_info->base); |
| 114 | } |
| 115 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 116 | static const struct clk_ops audio_ext_clk_ops = { |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 117 | .prepare = audio_ext_clk_prepare, |
| 118 | .unprepare = audio_ext_clk_unprepare, |
| 119 | }; |
| 120 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 121 | static struct audio_ext_clk audio_clk_array[] = { |
| 122 | { |
| 123 | .pnctrl_info = {NULL}, |
| 124 | .fact = { |
| 125 | .mult = 1, |
| 126 | .div = 1, |
| 127 | .hw.init = &(struct clk_init_data){ |
| 128 | .name = "audio_ext_pmi_clk", |
| 129 | .parent_names = (const char *[]) |
| 130 | { "qpnp_clkdiv_1" }, |
| 131 | .num_parents = 1, |
| 132 | .ops = &audio_ext_clk_ops, |
| 133 | }, |
| 134 | }, |
| 135 | }, |
| 136 | { |
| 137 | .pnctrl_info = {NULL}, |
| 138 | .fact = { |
| 139 | .mult = 1, |
| 140 | .div = 1, |
| 141 | .hw.init = &(struct clk_init_data){ |
| 142 | .name = "audio_ext_pmi_lnbb_clk", |
| 143 | .parent_names = (const char *[]) |
| 144 | { "ln_bb_clk2" }, |
| 145 | .num_parents = 1, |
| 146 | .ops = &clk_dummy_ops, |
| 147 | }, |
| 148 | }, |
| 149 | }, |
| 150 | { |
| 151 | .pnctrl_info = {NULL}, |
| 152 | .fact = { |
| 153 | .mult = 1, |
| 154 | .div = 1, |
| 155 | .hw.init = &(struct clk_init_data){ |
| 156 | .name = "audio_lpass_mclk", |
| 157 | .ops = &audio_ext_clk_ops, |
| 158 | }, |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 159 | }, |
| 160 | }, |
| 161 | }; |
| 162 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 163 | static int audio_get_pinctrl(struct platform_device *pdev) |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 164 | { |
| 165 | struct device *dev = &pdev->dev; |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 166 | struct audio_ext_clk_priv *clk_priv = platform_get_drvdata(pdev); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 167 | struct pinctrl_info *pnctrl_info; |
| 168 | struct pinctrl *pinctrl; |
| 169 | int ret; |
| 170 | u32 reg; |
| 171 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 172 | if (clk_priv->clk_src == AUDIO_EXT_CLK_LNBB2) { |
| 173 | dev_dbg(dev, "%s no pinctrl for clk_src = %d\n", |
| 174 | __func__, clk_priv->clk_src); |
| 175 | return 0; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 176 | } |
| 177 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 178 | pnctrl_info = &clk_priv->audio_clk.pnctrl_info; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 179 | if (pnctrl_info->pinctrl) { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 180 | dev_err(dev, "%s: already requested before\n", |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 181 | __func__); |
| 182 | return -EINVAL; |
| 183 | } |
| 184 | |
| 185 | pinctrl = devm_pinctrl_get(dev); |
| 186 | if (IS_ERR_OR_NULL(pinctrl)) { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 187 | dev_err(dev, "%s: Unable to get pinctrl handle\n", |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 188 | __func__); |
| 189 | return -EINVAL; |
| 190 | } |
| 191 | pnctrl_info->pinctrl = pinctrl; |
| 192 | /* get all state handles from Device Tree */ |
| 193 | pnctrl_info->sleep = pinctrl_lookup_state(pinctrl, "sleep"); |
| 194 | if (IS_ERR(pnctrl_info->sleep)) { |
| 195 | dev_err(dev, "%s: could not get sleep pinstate\n", |
| 196 | __func__); |
| 197 | goto err; |
| 198 | } |
| 199 | pnctrl_info->active = pinctrl_lookup_state(pinctrl, "active"); |
| 200 | if (IS_ERR(pnctrl_info->active)) { |
| 201 | dev_err(dev, "%s: could not get active pinstate\n", |
| 202 | __func__); |
| 203 | goto err; |
| 204 | } |
| 205 | /* Reset the TLMM pins to a default state */ |
| 206 | ret = pinctrl_select_state(pnctrl_info->pinctrl, |
| 207 | pnctrl_info->sleep); |
| 208 | if (ret) { |
| 209 | dev_err(dev, "%s: Disable TLMM pins failed with %d\n", |
| 210 | __func__, ret); |
| 211 | goto err; |
| 212 | } |
| 213 | |
| 214 | ret = of_property_read_u32(dev->of_node, "qcom,mclk-clk-reg", ®); |
| 215 | if (ret < 0) { |
| 216 | dev_dbg(dev, "%s: miss mclk reg\n", __func__); |
| 217 | } else { |
| 218 | pnctrl_info->base = ioremap(reg, sizeof(u32)); |
| 219 | if (pnctrl_info->base == NULL) { |
| 220 | dev_err(dev, "%s ioremap failed\n", __func__); |
| 221 | goto err; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | return 0; |
| 226 | |
| 227 | err: |
| 228 | devm_pinctrl_put(pnctrl_info->pinctrl); |
| 229 | return -EINVAL; |
| 230 | } |
| 231 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 232 | static int audio_put_pinctrl(struct platform_device *pdev) |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 233 | { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 234 | struct audio_ext_clk_priv *clk_priv = platform_get_drvdata(pdev); |
| 235 | struct pinctrl_info *pnctrl_info = NULL; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 236 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 237 | pnctrl_info = &clk_priv->audio_clk.pnctrl_info; |
| 238 | if (pnctrl_info && pnctrl_info->pinctrl) { |
| 239 | devm_pinctrl_put(pnctrl_info->pinctrl); |
| 240 | pnctrl_info->pinctrl = NULL; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | return 0; |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 244 | } |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 245 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 246 | static int audio_get_clk_data(struct platform_device *pdev) |
| 247 | { |
| 248 | int ret; |
| 249 | struct clk *audio_clk; |
| 250 | struct clk_hw *clkhw; |
| 251 | struct clk_onecell_data *clk_data; |
| 252 | struct audio_ext_clk_priv *clk_priv = platform_get_drvdata(pdev); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 253 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 254 | clk_data = devm_kzalloc(&pdev->dev, sizeof(*clk_data), GFP_KERNEL); |
| 255 | if (!clk_data) |
| 256 | return -ENOMEM; |
| 257 | |
| 258 | clk_data->clk_num = 1; |
| 259 | clk_data->clks = devm_kzalloc(&pdev->dev, |
| 260 | sizeof(struct clk *), |
| 261 | GFP_KERNEL); |
| 262 | if (!clk_data->clks) |
| 263 | return -ENOMEM; |
| 264 | |
| 265 | clkhw = &clk_priv->audio_clk.fact.hw; |
| 266 | audio_clk = devm_clk_register(&pdev->dev, clkhw); |
| 267 | if (IS_ERR(audio_clk)) { |
| 268 | dev_err(&pdev->dev, |
| 269 | "%s: clock register failed for clk_src = %d\\n", |
| 270 | __func__, clk_priv->clk_src); |
| 271 | ret = PTR_ERR(audio_clk); |
| 272 | return ret; |
| 273 | } |
| 274 | clk_data->clks[0] = audio_clk; |
| 275 | |
| 276 | ret = of_clk_add_provider(pdev->dev.of_node, |
| 277 | of_clk_src_onecell_get, clk_data); |
| 278 | if (ret) |
| 279 | dev_err(&pdev->dev, "%s: clock add failed for clk_src = %d\n", |
| 280 | __func__, clk_priv->clk_src); |
| 281 | |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 282 | return ret; |
| 283 | } |
| 284 | |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 285 | static int audio_ref_clk_probe(struct platform_device *pdev) |
| 286 | { |
| 287 | int ret; |
| 288 | struct audio_ext_clk_priv *clk_priv; |
| 289 | u32 clk_freq = 0, clk_id = 0, clk_src = 0; |
| 290 | |
| 291 | |
| 292 | clk_priv = devm_kzalloc(&pdev->dev, sizeof(*clk_priv), GFP_KERNEL); |
| 293 | if (!clk_priv) |
| 294 | return -ENOMEM; |
| 295 | |
| 296 | ret = of_property_read_u32(pdev->dev.of_node, |
| 297 | "qcom,codec-ext-clk-src", |
| 298 | &clk_src); |
| 299 | if (ret) { |
| 300 | dev_err(&pdev->dev, "%s: could not get clk source, ret = %d\n", |
| 301 | __func__, ret); |
| 302 | return ret; |
| 303 | } |
| 304 | |
| 305 | if (clk_src >= AUDIO_EXT_CLK_MAX) { |
| 306 | dev_err(&pdev->dev, "%s: Invalid clk source = %d\n", |
| 307 | __func__, clk_src); |
| 308 | return -EINVAL; |
| 309 | } |
| 310 | |
| 311 | clk_priv->clk_src = clk_src; |
| 312 | memcpy(&clk_priv->audio_clk, &audio_clk_array[clk_src], |
| 313 | sizeof(struct audio_ext_clk)); |
| 314 | |
| 315 | /* Init lpass clk default values */ |
| 316 | clk_priv->clk_cfg.clk_set_minor_version = |
| 317 | Q6AFE_LPASS_CLK_CONFIG_API_VERSION; |
| 318 | clk_priv->clk_cfg.clk_id = Q6AFE_LPASS_CLK_ID_SPEAKER_I2S_OSR; |
| 319 | clk_priv->clk_cfg.clk_freq_in_hz = Q6AFE_LPASS_OSR_CLK_9_P600_MHZ; |
| 320 | clk_priv->clk_cfg.clk_attri = Q6AFE_LPASS_CLK_ATTRIBUTE_COUPLE_NO; |
| 321 | |
| 322 | ret = of_property_read_u32(pdev->dev.of_node, |
| 323 | "qcom,codec-lpass-ext-clk-freq", |
| 324 | &clk_freq); |
| 325 | if (!ret) |
| 326 | clk_priv->clk_cfg.clk_freq_in_hz = clk_freq; |
| 327 | |
| 328 | ret = of_property_read_u32(pdev->dev.of_node, |
| 329 | "qcom,codec-lpass-clk-id", |
| 330 | &clk_id); |
| 331 | if (!ret) |
| 332 | clk_priv->clk_cfg.clk_id = clk_id; |
| 333 | |
| 334 | dev_dbg(&pdev->dev, "%s: ext-clk freq: %d, lpass clk_id: %d, clk_src: %d\n", |
| 335 | __func__, clk_priv->clk_cfg.clk_freq_in_hz, |
| 336 | clk_priv->clk_cfg.clk_id, clk_priv->clk_src); |
| 337 | platform_set_drvdata(pdev, clk_priv); |
| 338 | |
| 339 | ret = audio_get_pinctrl(pdev); |
| 340 | if (ret) { |
| 341 | dev_err(&pdev->dev, "%s: Parsing PMI pinctrl failed\n", |
| 342 | __func__); |
| 343 | return ret; |
| 344 | } |
| 345 | |
| 346 | ret = audio_get_clk_data(pdev); |
| 347 | if (ret) { |
| 348 | dev_err(&pdev->dev, "%s: clk_init is failed\n", |
| 349 | __func__); |
| 350 | audio_put_pinctrl(pdev); |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 357 | static int audio_ref_clk_remove(struct platform_device *pdev) |
| 358 | { |
Vidyakumar Athota | ecc4eda | 2017-12-13 16:24:10 -0800 | [diff] [blame^] | 359 | audio_put_pinctrl(pdev); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static const struct of_device_id audio_ref_clk_match[] = { |
| 365 | {.compatible = "qcom,audio-ref-clk"}, |
| 366 | {} |
| 367 | }; |
| 368 | MODULE_DEVICE_TABLE(of, audio_ref_clk_match); |
| 369 | |
| 370 | static struct platform_driver audio_ref_clk_driver = { |
| 371 | .driver = { |
| 372 | .name = "audio-ref-clk", |
| 373 | .owner = THIS_MODULE, |
| 374 | .of_match_table = audio_ref_clk_match, |
| 375 | }, |
| 376 | .probe = audio_ref_clk_probe, |
| 377 | .remove = audio_ref_clk_remove, |
| 378 | }; |
| 379 | |
| 380 | int audio_ref_clk_platform_init(void) |
| 381 | { |
| 382 | return platform_driver_register(&audio_ref_clk_driver); |
| 383 | } |
| 384 | |
| 385 | void audio_ref_clk_platform_exit(void) |
| 386 | { |
| 387 | platform_driver_unregister(&audio_ref_clk_driver); |
| 388 | } |
| 389 | |
| 390 | MODULE_DESCRIPTION("Audio Ref Up Clock module platform driver"); |
| 391 | MODULE_LICENSE("GPL v2"); |