Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. |
| 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/module.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/clk.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/debugfs.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <asm/uaccess.h> |
| 21 | #include <mach/qdsp6v2/audio_dev_ctl.h> |
| 22 | #include <mach/debug_mm.h> |
| 23 | #include <sound/q6afe.h> |
| 24 | #include <sound/apr_audio.h> |
| 25 | #include "snddev_hdmi.h" |
| 26 | |
| 27 | static DEFINE_MUTEX(snddev_hdmi_lock); |
| 28 | static int snddev_hdmi_active; |
| 29 | |
| 30 | static int snddev_hdmi_open(struct msm_snddev_info *dev_info) |
| 31 | { |
| 32 | int rc = 0; |
| 33 | union afe_port_config afe_config; |
| 34 | struct snddev_hdmi_data *snddev_hdmi_data; |
| 35 | |
| 36 | if (!dev_info) { |
| 37 | pr_err("msm_snddev_info is null\n"); |
| 38 | return -EINVAL; |
| 39 | } |
| 40 | |
| 41 | snddev_hdmi_data = dev_info->private_data; |
| 42 | |
| 43 | mutex_lock(&snddev_hdmi_lock); |
| 44 | |
| 45 | if (snddev_hdmi_active) { |
| 46 | pr_err("HDMI snddev already active\n"); |
| 47 | mutex_unlock(&snddev_hdmi_lock); |
| 48 | return -EBUSY; |
| 49 | } |
| 50 | |
| 51 | if (snddev_hdmi_data->on_apps) { |
| 52 | snddev_hdmi_active = 1; |
| 53 | pr_debug("%s open done\n", dev_info->name); |
| 54 | mutex_unlock(&snddev_hdmi_lock); |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | afe_config.hdmi.channel_mode = snddev_hdmi_data->channel_mode; |
| 59 | afe_config.hdmi.bitwidth = 16; |
| 60 | afe_config.hdmi.data_type = 0; |
| 61 | rc = afe_open(snddev_hdmi_data->copp_id, &afe_config, |
| 62 | dev_info->sample_rate); |
| 63 | |
| 64 | if (rc < 0) { |
| 65 | pr_err("afe_open failed\n"); |
| 66 | mutex_unlock(&snddev_hdmi_lock); |
| 67 | return -EINVAL; |
| 68 | } |
| 69 | snddev_hdmi_active = 1; |
| 70 | |
| 71 | pr_debug("%s open done\n", dev_info->name); |
| 72 | |
| 73 | mutex_unlock(&snddev_hdmi_lock); |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static int snddev_hdmi_close(struct msm_snddev_info *dev_info) |
| 79 | { |
| 80 | |
| 81 | struct snddev_hdmi_data *snddev_hdmi_data; |
| 82 | |
| 83 | if (!dev_info) { |
| 84 | pr_err("msm_snddev_info is null\n"); |
| 85 | return -EINVAL; |
| 86 | } |
| 87 | |
| 88 | snddev_hdmi_data = dev_info->private_data; |
| 89 | |
| 90 | if (!dev_info->opened) { |
| 91 | pr_err("calling close device with out opening the" |
| 92 | " device\n"); |
| 93 | return -EPERM; |
| 94 | } |
| 95 | mutex_lock(&snddev_hdmi_lock); |
| 96 | |
| 97 | if (!snddev_hdmi_active) { |
| 98 | pr_err("HDMI snddev not active\n"); |
| 99 | mutex_unlock(&snddev_hdmi_lock); |
| 100 | return -EPERM; |
| 101 | } |
| 102 | snddev_hdmi_active = 0; |
| 103 | |
| 104 | if (snddev_hdmi_data->on_apps) { |
Deepa Madiregama | 6a3a01a | 2011-10-28 06:34:17 +0530 | [diff] [blame] | 105 | pr_debug("%s Closed\n", dev_info->name); |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 106 | |
| 107 | mutex_unlock(&snddev_hdmi_lock); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | afe_close(HDMI_RX); |
| 113 | |
| 114 | pr_debug("%s closed\n", dev_info->name); |
| 115 | mutex_unlock(&snddev_hdmi_lock); |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static int snddev_hdmi_set_freq(struct msm_snddev_info *dev_info, u32 req_freq) |
| 121 | { |
| 122 | if (req_freq != 48000) { |
| 123 | pr_debug("Unsupported Frequency:%d\n", req_freq); |
| 124 | return -EINVAL; |
| 125 | } |
| 126 | return 48000; |
| 127 | } |
| 128 | |
| 129 | static int snddev_hdmi_probe(struct platform_device *pdev) |
| 130 | { |
| 131 | int rc = 0; |
| 132 | struct snddev_hdmi_data *pdata; |
| 133 | struct msm_snddev_info *dev_info; |
| 134 | |
| 135 | if (!pdev || !pdev->dev.platform_data) { |
| 136 | printk(KERN_ALERT "Invalid caller\n"); |
| 137 | return -ENODEV; |
| 138 | } |
| 139 | |
| 140 | pdata = pdev->dev.platform_data; |
| 141 | if (!(pdata->capability & SNDDEV_CAP_RX)) { |
| 142 | pr_err("invalid device data either RX or TX\n"); |
| 143 | return -ENODEV; |
| 144 | } |
| 145 | |
| 146 | dev_info = kzalloc(sizeof(struct msm_snddev_info), GFP_KERNEL); |
| 147 | if (!dev_info) { |
| 148 | pr_err("unable to allocate memeory for msm_snddev_info\n"); |
| 149 | return -ENOMEM; |
| 150 | } |
| 151 | |
| 152 | dev_info->name = pdata->name; |
| 153 | dev_info->copp_id = pdata->copp_id; |
| 154 | dev_info->acdb_id = pdata->acdb_id; |
| 155 | dev_info->private_data = (void *)pdata; |
| 156 | dev_info->dev_ops.open = snddev_hdmi_open; |
| 157 | dev_info->dev_ops.close = snddev_hdmi_close; |
| 158 | dev_info->dev_ops.set_freq = snddev_hdmi_set_freq; |
| 159 | dev_info->capability = pdata->capability; |
| 160 | dev_info->opened = 0; |
| 161 | msm_snddev_register(dev_info); |
| 162 | dev_info->sample_rate = pdata->default_sample_rate; |
| 163 | |
| 164 | pr_debug("probe done for %s\n", pdata->name); |
| 165 | return rc; |
| 166 | } |
| 167 | |
| 168 | static struct platform_driver snddev_hdmi_driver = { |
| 169 | .probe = snddev_hdmi_probe, |
| 170 | .driver = {.name = "snddev_hdmi"} |
| 171 | }; |
| 172 | |
| 173 | static int __init snddev_hdmi_init(void) |
| 174 | { |
| 175 | s32 rc; |
| 176 | |
| 177 | rc = platform_driver_register(&snddev_hdmi_driver); |
| 178 | if (IS_ERR_VALUE(rc)) { |
| 179 | |
| 180 | pr_err("platform_driver_register failed.\n"); |
| 181 | goto error_platform_driver; |
| 182 | } |
| 183 | |
| 184 | pr_debug("snddev_hdmi_init : done\n"); |
| 185 | |
| 186 | return 0; |
| 187 | |
| 188 | error_platform_driver: |
| 189 | |
| 190 | pr_err("encounterd error\n"); |
| 191 | return -ENODEV; |
| 192 | } |
| 193 | |
| 194 | module_init(snddev_hdmi_init); |
| 195 | |
| 196 | MODULE_DESCRIPTION("HDMI Sound Device driver"); |
| 197 | MODULE_VERSION("1.0"); |
| 198 | MODULE_LICENSE("GPL v2"); |