Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2002 Steve Schmidtke
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/sound.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/soundcard.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <os.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) struct hostaudio_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) struct hostmixer_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define HOSTAUDIO_DEV_DSP "/dev/sound/dsp"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define HOSTAUDIO_DEV_MIXER "/dev/sound/mixer"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * Changed either at boot time or module load time.  At boot, this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * single-threaded; at module load, multiple modules would each have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * their own copy of these variables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) static char *dsp = HOSTAUDIO_DEV_DSP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) static char *mixer = HOSTAUDIO_DEV_MIXER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define DSP_HELP \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) "    This is used to specify the host dsp device to the hostaudio driver.\n" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) "    The default is \"" HOSTAUDIO_DEV_DSP "\".\n\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #define MIXER_HELP \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) "    This is used to specify the host mixer device to the hostaudio driver.\n"\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) "    The default is \"" HOSTAUDIO_DEV_MIXER "\".\n\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) module_param(dsp, charp, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) MODULE_PARM_DESC(dsp, DSP_HELP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) module_param(mixer, charp, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) MODULE_PARM_DESC(mixer, MIXER_HELP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) #ifndef MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static int set_dsp(char *name, int *add)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	dsp = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) __uml_setup("dsp=", set_dsp, "dsp=<dsp device>\n" DSP_HELP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static int set_mixer(char *name, int *add)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	mixer = name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) __uml_setup("mixer=", set_mixer, "mixer=<mixer device>\n" MIXER_HELP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static DEFINE_MUTEX(hostaudio_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) /* /dev/dsp file operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) static ssize_t hostaudio_read(struct file *file, char __user *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			      size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct hostaudio_state *state = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	void *kbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	printk(KERN_DEBUG "hostaudio: read called, count = %d\n", count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	kbuf = kmalloc(count, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (kbuf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	err = os_read_file(state->fd, kbuf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (copy_to_user(buffer, kbuf, err))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	kfree(kbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) static ssize_t hostaudio_write(struct file *file, const char __user *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			       size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct hostaudio_state *state = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	void *kbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	printk(KERN_DEBUG "hostaudio: write called, count = %d\n", count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	kbuf = memdup_user(buffer, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	if (IS_ERR(kbuf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		return PTR_ERR(kbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	err = os_write_file(state->fd, kbuf, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	*ppos += err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	kfree(kbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static __poll_t hostaudio_poll(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 				struct poll_table_struct *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	__poll_t mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	printk(KERN_DEBUG "hostaudio: poll called (unimplemented)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	return mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static long hostaudio_ioctl(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			   unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct hostaudio_state *state = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	unsigned long data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	printk(KERN_DEBUG "hostaudio: ioctl called, cmd = %u\n", cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	switch(cmd){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	case SNDCTL_DSP_SPEED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	case SNDCTL_DSP_STEREO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	case SNDCTL_DSP_GETBLKSIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	case SNDCTL_DSP_CHANNELS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	case SNDCTL_DSP_SUBDIVIDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	case SNDCTL_DSP_SETFRAGMENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		if (get_user(data, (int __user *) arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	err = os_ioctl_generic(state->fd, cmd, (unsigned long) &data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	switch(cmd){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	case SNDCTL_DSP_SPEED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	case SNDCTL_DSP_STEREO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	case SNDCTL_DSP_GETBLKSIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	case SNDCTL_DSP_CHANNELS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	case SNDCTL_DSP_SUBDIVIDE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	case SNDCTL_DSP_SETFRAGMENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		if (put_user(data, (int __user *) arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static int hostaudio_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct hostaudio_state *state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	int r = 0, w = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	kernel_param_lock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	printk(KERN_DEBUG "hostaudio: open called (host: %s)\n", dsp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	kernel_param_unlock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	state = kmalloc(sizeof(struct hostaudio_state), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	if (state == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	if (file->f_mode & FMODE_READ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		r = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (file->f_mode & FMODE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		w = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	kernel_param_lock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	mutex_lock(&hostaudio_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	mutex_unlock(&hostaudio_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	kernel_param_unlock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		kfree(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	state->fd = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	file->private_data = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int hostaudio_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	struct hostaudio_state *state = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	printk(KERN_DEBUG "hostaudio: release called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	os_close_file(state->fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	kfree(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) /* /dev/mixer file operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static long hostmixer_ioctl_mixdev(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 				  unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	struct hostmixer_state *state = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	printk(KERN_DEBUG "hostmixer: ioctl called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	return os_ioctl_generic(state->fd, cmd, arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	struct hostmixer_state *state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	int r = 0, w = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	printk(KERN_DEBUG "hostmixer: open called (host: %s)\n", mixer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	state = kmalloc(sizeof(struct hostmixer_state), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (state == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	if (file->f_mode & FMODE_READ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		r = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (file->f_mode & FMODE_WRITE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		w = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	kernel_param_lock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	mutex_lock(&hostaudio_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	mutex_unlock(&hostaudio_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	kernel_param_unlock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		kernel_param_lock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		printk(KERN_ERR "hostaudio_open_mixdev failed to open '%s', "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		       "err = %d\n", dsp, -ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		kernel_param_unlock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		kfree(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	file->private_data = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static int hostmixer_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	struct hostmixer_state *state = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	printk(KERN_DEBUG "hostmixer: release called\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	os_close_file(state->fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	kfree(state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /* kernel module operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static const struct file_operations hostaudio_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.owner          = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.llseek         = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.read           = hostaudio_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	.write          = hostaudio_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.poll           = hostaudio_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.unlocked_ioctl	= hostaudio_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	.compat_ioctl	= compat_ptr_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	.mmap           = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	.open           = hostaudio_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	.release        = hostaudio_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static const struct file_operations hostmixer_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	.owner          = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	.llseek         = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	.unlocked_ioctl	= hostmixer_ioctl_mixdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	.open           = hostmixer_open_mixdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	.release        = hostmixer_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	int dev_audio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	int dev_mixer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) } module_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_AUTHOR("Steve Schmidtke");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) MODULE_DESCRIPTION("UML Audio Relay");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static int __init hostaudio_init_module(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	kernel_param_lock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	printk(KERN_INFO "UML Audio Relay (host dsp = %s, host mixer = %s)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	       dsp, mixer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	kernel_param_unlock(THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	module_data.dev_audio = register_sound_dsp(&hostaudio_fops, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	if (module_data.dev_audio < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		printk(KERN_ERR "hostaudio: couldn't register DSP device!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	module_data.dev_mixer = register_sound_mixer(&hostmixer_fops, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	if (module_data.dev_mixer < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		printk(KERN_ERR "hostmixer: couldn't register mixer "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		       "device!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		unregister_sound_dsp(module_data.dev_audio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static void __exit hostaudio_cleanup_module (void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	unregister_sound_mixer(module_data.dev_mixer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	unregister_sound_dsp(module_data.dev_audio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) module_init(hostaudio_init_module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) module_exit(hostaudio_cleanup_module);