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Linux/sound/soc/intel/common/sst-acpi.c

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  1 /*
  2  * Intel SST loader on ACPI systems
  3  *
  4  * Copyright (C) 2013, Intel Corporation. All rights reserved.
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public License version
  8  * 2 as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  */
 16 
 17 #include <linux/acpi.h>
 18 #include <linux/device.h>
 19 #include <linux/firmware.h>
 20 #include <linux/module.h>
 21 #include <linux/platform_device.h>
 22 
 23 #include "sst-dsp.h"
 24 
 25 #define SST_LPT_DSP_DMA_ADDR_OFFSET     0x0F0000
 26 #define SST_WPT_DSP_DMA_ADDR_OFFSET     0x0FE000
 27 #define SST_LPT_DSP_DMA_SIZE            (1024 - 1)
 28 
 29 /* Descriptor for SST ASoC machine driver */
 30 struct sst_acpi_mach {
 31         /* ACPI ID for the matching machine driver. Audio codec for instance */
 32         const u8 id[ACPI_ID_LEN];
 33         /* machine driver name */
 34         const char *drv_name;
 35         /* firmware file name */
 36         const char *fw_filename;
 37 };
 38 
 39 /* Descriptor for setting up SST platform data */
 40 struct sst_acpi_desc {
 41         const char *drv_name;
 42         struct sst_acpi_mach *machines;
 43         /* Platform resource indexes. Must set to -1 if not used */
 44         int resindex_lpe_base;
 45         int resindex_pcicfg_base;
 46         int resindex_fw_base;
 47         int irqindex_host_ipc;
 48         int resindex_dma_base;
 49         /* Unique number identifying the SST core on platform */
 50         int sst_id;
 51         /* DMA only valid when resindex_dma_base != -1*/
 52         int dma_engine;
 53         int dma_size;
 54 };
 55 
 56 struct sst_acpi_priv {
 57         struct platform_device *pdev_mach;
 58         struct platform_device *pdev_pcm;
 59         struct sst_pdata sst_pdata;
 60         struct sst_acpi_desc *desc;
 61         struct sst_acpi_mach *mach;
 62 };
 63 
 64 static void sst_acpi_fw_cb(const struct firmware *fw, void *context)
 65 {
 66         struct platform_device *pdev = context;
 67         struct device *dev = &pdev->dev;
 68         struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
 69         struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
 70         struct sst_acpi_desc *desc = sst_acpi->desc;
 71         struct sst_acpi_mach *mach = sst_acpi->mach;
 72 
 73         sst_pdata->fw = fw;
 74         if (!fw) {
 75                 dev_err(dev, "Cannot load firmware %s\n", mach->fw_filename);
 76                 return;
 77         }
 78 
 79         /* register PCM and DAI driver */
 80         sst_acpi->pdev_pcm =
 81                 platform_device_register_data(dev, desc->drv_name, -1,
 82                                               sst_pdata, sizeof(*sst_pdata));
 83         if (IS_ERR(sst_acpi->pdev_pcm)) {
 84                 dev_err(dev, "Cannot register device %s. Error %d\n",
 85                         desc->drv_name, (int)PTR_ERR(sst_acpi->pdev_pcm));
 86         }
 87 
 88         return;
 89 }
 90 
 91 static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
 92                                        void *context, void **ret)
 93 {
 94         *(bool *)context = true;
 95         return AE_OK;
 96 }
 97 
 98 static struct sst_acpi_mach *sst_acpi_find_machine(
 99         struct sst_acpi_mach *machines)
100 {
101         struct sst_acpi_mach *mach;
102         bool found = false;
103 
104         for (mach = machines; mach->id[0]; mach++)
105                 if (ACPI_SUCCESS(acpi_get_devices(mach->id,
106                                                   sst_acpi_mach_match,
107                                                   &found, NULL)) && found)
108                         return mach;
109 
110         return NULL;
111 }
112 
113 static int sst_acpi_probe(struct platform_device *pdev)
114 {
115         const struct acpi_device_id *id;
116         struct device *dev = &pdev->dev;
117         struct sst_acpi_priv *sst_acpi;
118         struct sst_pdata *sst_pdata;
119         struct sst_acpi_mach *mach;
120         struct sst_acpi_desc *desc;
121         struct resource *mmio;
122         int ret = 0;
123 
124         sst_acpi = devm_kzalloc(dev, sizeof(*sst_acpi), GFP_KERNEL);
125         if (sst_acpi == NULL)
126                 return -ENOMEM;
127 
128         id = acpi_match_device(dev->driver->acpi_match_table, dev);
129         if (!id)
130                 return -ENODEV;
131 
132         desc = (struct sst_acpi_desc *)id->driver_data;
133         mach = sst_acpi_find_machine(desc->machines);
134         if (mach == NULL) {
135                 dev_err(dev, "No matching ASoC machine driver found\n");
136                 return -ENODEV;
137         }
138 
139         sst_pdata = &sst_acpi->sst_pdata;
140         sst_pdata->id = desc->sst_id;
141         sst_pdata->dma_dev = dev;
142         sst_acpi->desc = desc;
143         sst_acpi->mach = mach;
144 
145         sst_pdata->resindex_dma_base = desc->resindex_dma_base;
146         if (desc->resindex_dma_base >= 0) {
147                 sst_pdata->dma_engine = desc->dma_engine;
148                 sst_pdata->dma_base = desc->resindex_dma_base;
149                 sst_pdata->dma_size = desc->dma_size;
150         }
151 
152         if (desc->irqindex_host_ipc >= 0)
153                 sst_pdata->irq = platform_get_irq(pdev, desc->irqindex_host_ipc);
154 
155         if (desc->resindex_lpe_base >= 0) {
156                 mmio = platform_get_resource(pdev, IORESOURCE_MEM,
157                                              desc->resindex_lpe_base);
158                 if (mmio) {
159                         sst_pdata->lpe_base = mmio->start;
160                         sst_pdata->lpe_size = resource_size(mmio);
161                 }
162         }
163 
164         if (desc->resindex_pcicfg_base >= 0) {
165                 mmio = platform_get_resource(pdev, IORESOURCE_MEM,
166                                              desc->resindex_pcicfg_base);
167                 if (mmio) {
168                         sst_pdata->pcicfg_base = mmio->start;
169                         sst_pdata->pcicfg_size = resource_size(mmio);
170                 }
171         }
172 
173         if (desc->resindex_fw_base >= 0) {
174                 mmio = platform_get_resource(pdev, IORESOURCE_MEM,
175                                              desc->resindex_fw_base);
176                 if (mmio) {
177                         sst_pdata->fw_base = mmio->start;
178                         sst_pdata->fw_size = resource_size(mmio);
179                 }
180         }
181 
182         platform_set_drvdata(pdev, sst_acpi);
183 
184         /* register machine driver */
185         sst_acpi->pdev_mach =
186                 platform_device_register_data(dev, mach->drv_name, -1,
187                                               sst_pdata, sizeof(*sst_pdata));
188         if (IS_ERR(sst_acpi->pdev_mach))
189                 return PTR_ERR(sst_acpi->pdev_mach);
190 
191         /* continue SST probing after firmware is loaded */
192         ret = request_firmware_nowait(THIS_MODULE, true, mach->fw_filename,
193                                       dev, GFP_KERNEL, pdev, sst_acpi_fw_cb);
194         if (ret)
195                 platform_device_unregister(sst_acpi->pdev_mach);
196 
197         return ret;
198 }
199 
200 static int sst_acpi_remove(struct platform_device *pdev)
201 {
202         struct sst_acpi_priv *sst_acpi = platform_get_drvdata(pdev);
203         struct sst_pdata *sst_pdata = &sst_acpi->sst_pdata;
204 
205         platform_device_unregister(sst_acpi->pdev_mach);
206         if (!IS_ERR_OR_NULL(sst_acpi->pdev_pcm))
207                 platform_device_unregister(sst_acpi->pdev_pcm);
208         release_firmware(sst_pdata->fw);
209 
210         return 0;
211 }
212 
213 static struct sst_acpi_mach haswell_machines[] = {
214         { "INT33CA", "haswell-audio", "intel/IntcSST1.bin" },
215         {}
216 };
217 
218 static struct sst_acpi_desc sst_acpi_haswell_desc = {
219         .drv_name = "haswell-pcm-audio",
220         .machines = haswell_machines,
221         .resindex_lpe_base = 0,
222         .resindex_pcicfg_base = 1,
223         .resindex_fw_base = -1,
224         .irqindex_host_ipc = 0,
225         .sst_id = SST_DEV_ID_LYNX_POINT,
226         .dma_engine = SST_DMA_TYPE_DW,
227         .resindex_dma_base = SST_LPT_DSP_DMA_ADDR_OFFSET,
228         .dma_size = SST_LPT_DSP_DMA_SIZE,
229 };
230 
231 static struct sst_acpi_mach broadwell_machines[] = {
232         { "INT343A", "broadwell-audio", "intel/IntcSST2.bin" },
233         {}
234 };
235 
236 static struct sst_acpi_desc sst_acpi_broadwell_desc = {
237         .drv_name = "haswell-pcm-audio",
238         .machines = broadwell_machines,
239         .resindex_lpe_base = 0,
240         .resindex_pcicfg_base = 1,
241         .resindex_fw_base = -1,
242         .irqindex_host_ipc = 0,
243         .sst_id = SST_DEV_ID_WILDCAT_POINT,
244         .dma_engine = SST_DMA_TYPE_DW,
245         .resindex_dma_base = SST_WPT_DSP_DMA_ADDR_OFFSET,
246         .dma_size = SST_LPT_DSP_DMA_SIZE,
247 };
248 
249 static struct sst_acpi_mach baytrail_machines[] = {
250         { "10EC5640", "byt-rt5640", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
251         { "193C9890", "byt-max98090", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
252         {}
253 };
254 
255 static struct sst_acpi_desc sst_acpi_baytrail_desc = {
256         .drv_name = "baytrail-pcm-audio",
257         .machines = baytrail_machines,
258         .resindex_lpe_base = 0,
259         .resindex_pcicfg_base = 1,
260         .resindex_fw_base = 2,
261         .irqindex_host_ipc = 5,
262         .sst_id = SST_DEV_ID_BYT,
263         .resindex_dma_base = -1,
264 };
265 
266 static struct acpi_device_id sst_acpi_match[] = {
267         { "INT33C8", (unsigned long)&sst_acpi_haswell_desc },
268         { "INT3438", (unsigned long)&sst_acpi_broadwell_desc },
269         { "80860F28", (unsigned long)&sst_acpi_baytrail_desc },
270         { }
271 };
272 MODULE_DEVICE_TABLE(acpi, sst_acpi_match);
273 
274 static struct platform_driver sst_acpi_driver = {
275         .probe = sst_acpi_probe,
276         .remove = sst_acpi_remove,
277         .driver = {
278                 .name = "sst-acpi",
279                 .acpi_match_table = ACPI_PTR(sst_acpi_match),
280         },
281 };
282 module_platform_driver(sst_acpi_driver);
283 
284 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@linux.intel.com>");
285 MODULE_DESCRIPTION("Intel SST loader on ACPI systems");
286 MODULE_LICENSE("GPL v2");
287 

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