projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 55b95e0e RN |
1 | /* |
| 2 | * omap4-hdmi-card.c | |
| 3 | * | |
| 4 | * OMAP ALSA SoC machine driver for TI OMAP4 HDMI | |
| 5 | * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ | |
| 6 | * Author: Ricardo Neri <ricardo.neri@ti.com> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU General Public License | |
| 10 | * version 2 as published by the Free Software Foundation. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, but | |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
| 20 | * 02110-1301 USA | |
| 21 | * | |
| 22 | */ | |
| 23 | ||
| da155d5b | 24 | #include <linux/module.h> |
| 55b95e0e RN |
25 | #include <sound/pcm.h> |
| 26 | #include <sound/soc.h> | |
| 27 | #include <asm/mach-types.h> | |
| 28 | #include <video/omapdss.h> | |
| 29 | ||
| 30 | #define DRV_NAME "omap4-hdmi-audio" | |
| 31 | ||
| 32 | static int omap4_hdmi_dai_hw_params(struct snd_pcm_substream *substream, | |
| 33 | struct snd_pcm_hw_params *params) | |
| 34 | { | |
| 35 | int i; | |
| 36 | struct omap_overlay_manager *mgr = NULL; | |
| 37 | struct device *dev = substream->pcm->card->dev; | |
| 38 | ||
| 39 | /* Find DSS HDMI device */ | |
| 40 | for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) { | |
| 41 | mgr = omap_dss_get_overlay_manager(i); | |
| 42 | if (mgr && mgr->device | |
| 43 | && mgr->device->type == OMAP_DISPLAY_TYPE_HDMI) | |
| 44 | break; | |
| 45 | } | |
| 46 | ||
| 47 | if (i == omap_dss_get_num_overlay_managers()) { | |
| 48 | dev_err(dev, "HDMI display device not found!\n"); | |
| 49 | return -ENODEV; | |
| 50 | } | |
| 51 | ||
| 52 | /* Make sure HDMI is power-on to avoid L3 interconnect errors */ | |
| 53 | if (mgr->device->state != OMAP_DSS_DISPLAY_ACTIVE) { | |
| 54 | dev_err(dev, "HDMI display is not active!\n"); | |
| 55 | return -EIO; | |
| 56 | } | |
| 57 | ||
| 58 | return 0; | |
| 59 | } | |
| 60 | ||
| 61 | static struct snd_soc_ops omap4_hdmi_dai_ops = { | |
| 62 | .hw_params = omap4_hdmi_dai_hw_params, | |
| 63 | }; | |
| 64 | ||
| 65 | static struct snd_soc_dai_link omap4_hdmi_dai = { | |
| 66 | .name = "HDMI", | |
| 67 | .stream_name = "HDMI", | |
| 68 | .cpu_dai_name = "hdmi-audio-dai", | |
| 69 | .platform_name = "omap-pcm-audio", | |
| 70 | .codec_name = "omapdss_hdmi", | |
| 71 | .codec_dai_name = "hdmi-audio-codec", | |
| 72 | .ops = &omap4_hdmi_dai_ops, | |
| 73 | }; | |
| 74 | ||
| 75 | static struct snd_soc_card snd_soc_omap4_hdmi = { | |
| 76 | .name = "OMAP4HDMI", | |
| 77 | .dai_link = &omap4_hdmi_dai, | |
| 78 | .num_links = 1, | |
| 79 | }; | |
| 80 | ||
| 81 | static __devinit int omap4_hdmi_probe(struct platform_device *pdev) | |
| 82 | { | |
| 83 | struct snd_soc_card *card = &snd_soc_omap4_hdmi; | |
| 84 | int ret; | |
| 85 | ||
| 86 | card->dev = &pdev->dev; | |
| 87 | ||
| 88 | ret = snd_soc_register_card(card); | |
| 89 | if (ret) { | |
| 90 | dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); | |
| 91 | card->dev = NULL; | |
| 92 | return ret; | |
| 93 | } | |
| 94 | return 0; | |
| 95 | } | |
| 96 | ||
| 97 | static int __devexit omap4_hdmi_remove(struct platform_device *pdev) | |
| 98 | { | |
| 99 | struct snd_soc_card *card = platform_get_drvdata(pdev); | |
| 100 | ||
| 101 | snd_soc_unregister_card(card); | |
| 102 | card->dev = NULL; | |
| 103 | return 0; | |
| 104 | } | |
| 105 | ||
| 106 | static struct platform_driver omap4_hdmi_driver = { | |
| 107 | .driver = { | |
| 108 | .name = "omap4-hdmi-audio", | |
| 109 | .owner = THIS_MODULE, | |
| 110 | }, | |
| 111 | .probe = omap4_hdmi_probe, | |
| 112 | .remove = __devexit_p(omap4_hdmi_remove), | |
| 113 | }; | |
| 114 | ||
| beda5bf5 | 115 | module_platform_driver(omap4_hdmi_driver); |
| 55b95e0e RN |
116 | |
| 117 | MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>"); | |
| 118 | MODULE_DESCRIPTION("OMAP4 HDMI machine ASoC driver"); | |
| 119 | MODULE_LICENSE("GPL"); | |
| 120 | MODULE_ALIAS("platform:" DRV_NAME); |