diff options
Diffstat (limited to 'drivers/staging/dream/qdsp5/snd.c')
-rw-r--r-- | drivers/staging/dream/qdsp5/snd.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/drivers/staging/dream/qdsp5/snd.c b/drivers/staging/dream/qdsp5/snd.c new file mode 100644 index 00000000000..037d7ffb7e6 --- /dev/null +++ b/drivers/staging/dream/qdsp5/snd.c @@ -0,0 +1,279 @@ +/* arch/arm/mach-msm/qdsp5/snd.c + * + * interface to "snd" service on the baseband cpu + * + * Copyright (C) 2008 HTC Corporation + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> +#include <linux/uaccess.h> +#include <linux/kthread.h> +#include <linux/delay.h> +#include <linux/msm_audio.h> + +#include <asm/atomic.h> +#include <asm/ioctls.h> +#include <mach/board.h> +#include <mach/msm_rpcrouter.h> + +struct snd_ctxt { + struct mutex lock; + int opened; + struct msm_rpc_endpoint *ept; + struct msm_snd_endpoints *snd_epts; +}; + +static struct snd_ctxt the_snd; + +#define RPC_SND_PROG 0x30000002 +#define RPC_SND_CB_PROG 0x31000002 +#if CONFIG_MSM_AMSS_VERSION == 6210 +#define RPC_SND_VERS 0x94756085 /* 2490720389 */ +#elif (CONFIG_MSM_AMSS_VERSION == 6220) || \ + (CONFIG_MSM_AMSS_VERSION == 6225) +#define RPC_SND_VERS 0xaa2b1a44 /* 2854951492 */ +#elif CONFIG_MSM_AMSS_VERSION == 6350 +#define RPC_SND_VERS MSM_RPC_VERS(1,0) +#endif + +#define SND_SET_DEVICE_PROC 2 +#define SND_SET_VOLUME_PROC 3 + +struct rpc_snd_set_device_args { + uint32_t device; + uint32_t ear_mute; + uint32_t mic_mute; + + uint32_t cb_func; + uint32_t client_data; +}; + +struct rpc_snd_set_volume_args { + uint32_t device; + uint32_t method; + uint32_t volume; + + uint32_t cb_func; + uint32_t client_data; +}; + +struct snd_set_device_msg { + struct rpc_request_hdr hdr; + struct rpc_snd_set_device_args args; +}; + +struct snd_set_volume_msg { + struct rpc_request_hdr hdr; + struct rpc_snd_set_volume_args args; +}; + +struct snd_endpoint *get_snd_endpoints(int *size); + +static inline int check_mute(int mute) +{ + return (mute == SND_MUTE_MUTED || + mute == SND_MUTE_UNMUTED) ? 0 : -EINVAL; +} + +static int get_endpoint(struct snd_ctxt *snd, unsigned long arg) +{ + int rc = 0, index; + struct msm_snd_endpoint ept; + + if (copy_from_user(&ept, (void __user *)arg, sizeof(ept))) { + pr_err("snd_ioctl get endpoint: invalid read pointer.\n"); + return -EFAULT; + } + + index = ept.id; + if (index < 0 || index >= snd->snd_epts->num) { + pr_err("snd_ioctl get endpoint: invalid index!\n"); + return -EINVAL; + } + + ept.id = snd->snd_epts->endpoints[index].id; + strncpy(ept.name, + snd->snd_epts->endpoints[index].name, + sizeof(ept.name)); + + if (copy_to_user((void __user *)arg, &ept, sizeof(ept))) { + pr_err("snd_ioctl get endpoint: invalid write pointer.\n"); + rc = -EFAULT; + } + + return rc; +} + +static long snd_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + struct snd_set_device_msg dmsg; + struct snd_set_volume_msg vmsg; + struct msm_snd_device_config dev; + struct msm_snd_volume_config vol; + struct snd_ctxt *snd = file->private_data; + int rc = 0; + + mutex_lock(&snd->lock); + switch (cmd) { + case SND_SET_DEVICE: + if (copy_from_user(&dev, (void __user *) arg, sizeof(dev))) { + pr_err("snd_ioctl set device: invalid pointer.\n"); + rc = -EFAULT; + break; + } + + dmsg.args.device = cpu_to_be32(dev.device); + dmsg.args.ear_mute = cpu_to_be32(dev.ear_mute); + dmsg.args.mic_mute = cpu_to_be32(dev.mic_mute); + if (check_mute(dev.ear_mute) < 0 || + check_mute(dev.mic_mute) < 0) { + pr_err("snd_ioctl set device: invalid mute status.\n"); + rc = -EINVAL; + break; + } + dmsg.args.cb_func = -1; + dmsg.args.client_data = 0; + + pr_info("snd_set_device %d %d %d\n", dev.device, + dev.ear_mute, dev.mic_mute); + + rc = msm_rpc_call(snd->ept, + SND_SET_DEVICE_PROC, + &dmsg, sizeof(dmsg), 5 * HZ); + break; + + case SND_SET_VOLUME: + if (copy_from_user(&vol, (void __user *) arg, sizeof(vol))) { + pr_err("snd_ioctl set volume: invalid pointer.\n"); + rc = -EFAULT; + break; + } + + vmsg.args.device = cpu_to_be32(vol.device); + vmsg.args.method = cpu_to_be32(vol.method); + if (vol.method != SND_METHOD_VOICE) { + pr_err("snd_ioctl set volume: invalid method.\n"); + rc = -EINVAL; + break; + } + + vmsg.args.volume = cpu_to_be32(vol.volume); + vmsg.args.cb_func = -1; + vmsg.args.client_data = 0; + + pr_info("snd_set_volume %d %d %d\n", vol.device, + vol.method, vol.volume); + + rc = msm_rpc_call(snd->ept, + SND_SET_VOLUME_PROC, + &vmsg, sizeof(vmsg), 5 * HZ); + break; + + case SND_GET_NUM_ENDPOINTS: + if (copy_to_user((void __user *)arg, + &snd->snd_epts->num, sizeof(unsigned))) { + pr_err("snd_ioctl get endpoint: invalid pointer.\n"); + rc = -EFAULT; + } + break; + + case SND_GET_ENDPOINT: + rc = get_endpoint(snd, arg); + break; + + default: + pr_err("snd_ioctl unknown command.\n"); + rc = -EINVAL; + break; + } + mutex_unlock(&snd->lock); + + return rc; +} + +static int snd_release(struct inode *inode, struct file *file) +{ + struct snd_ctxt *snd = file->private_data; + + mutex_lock(&snd->lock); + snd->opened = 0; + mutex_unlock(&snd->lock); + return 0; +} + +static int snd_open(struct inode *inode, struct file *file) +{ + struct snd_ctxt *snd = &the_snd; + int rc = 0; + + mutex_lock(&snd->lock); + if (snd->opened == 0) { + if (snd->ept == NULL) { + snd->ept = msm_rpc_connect(RPC_SND_PROG, RPC_SND_VERS, + MSM_RPC_UNINTERRUPTIBLE); + if (IS_ERR(snd->ept)) { + rc = PTR_ERR(snd->ept); + snd->ept = NULL; + pr_err("snd: failed to connect snd svc\n"); + goto err; + } + } + file->private_data = snd; + snd->opened = 1; + } else { + pr_err("snd already opened.\n"); + rc = -EBUSY; + } + +err: + mutex_unlock(&snd->lock); + return rc; +} + +static struct file_operations snd_fops = { + .owner = THIS_MODULE, + .open = snd_open, + .release = snd_release, + .unlocked_ioctl = snd_ioctl, +}; + +struct miscdevice snd_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = "msm_snd", + .fops = &snd_fops, +}; + +static int snd_probe(struct platform_device *pdev) +{ + struct snd_ctxt *snd = &the_snd; + mutex_init(&snd->lock); + snd->snd_epts = (struct msm_snd_endpoints *)pdev->dev.platform_data; + return misc_register(&snd_misc); +} + +static struct platform_driver snd_plat_driver = { + .probe = snd_probe, + .driver = { + .name = "msm_snd", + .owner = THIS_MODULE, + }, +}; + +static int __init snd_init(void) +{ + return platform_driver_register(&snd_plat_driver); +} + +module_init(snd_init); |