mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
ebbfbc2006
Avoid circular mutex lock by pushing the dev->lock to the .fini callback on each extension. As em28xx-dvb, em28xx-alsa and em28xx-rc have their own data structures, and don't touch at the common structure during .fini, only em28xx-v4l needs to be locked. [ 90.994317] ====================================================== [ 90.994356] [ INFO: possible circular locking dependency detected ] [ 90.994395] 3.13.0-rc1+ #24 Not tainted [ 90.994427] ------------------------------------------------------- [ 90.994458] khubd/54 is trying to acquire lock: [ 90.994490] (&card->controls_rwsem){++++.+}, at: [<ffffffffa0177b08>] snd_ctl_dev_free+0x28/0x60 [snd] [ 90.994656] [ 90.994656] but task is already holding lock: [ 90.994688] (&dev->lock){+.+.+.}, at: [<ffffffffa040db81>] em28xx_close_extension+0x31/0x90 [em28xx] [ 90.994843] [ 90.994843] which lock already depends on the new lock. [ 90.994843] [ 90.994874] [ 90.994874] the existing dependency chain (in reverse order) is: [ 90.994905] -> #1 (&dev->lock){+.+.+.}: [ 90.995057] [<ffffffff810b8fa3>] __lock_acquire+0xb43/0x1330 [ 90.995121] [<ffffffff810b9f82>] lock_acquire+0xa2/0x120 [ 90.995182] [<ffffffff816a5b6c>] mutex_lock_nested+0x5c/0x3c0 [ 90.995245] [<ffffffffa0422cca>] em28xx_vol_put_mute+0x1ba/0x1d0 [em28xx_alsa] [ 90.995309] [<ffffffffa017813d>] snd_ctl_elem_write+0xfd/0x140 [snd] [ 90.995376] [<ffffffffa01791c2>] snd_ctl_ioctl+0xe2/0x810 [snd] [ 90.995442] [<ffffffff811db8b0>] do_vfs_ioctl+0x300/0x520 [ 90.995504] [<ffffffff811dbb51>] SyS_ioctl+0x81/0xa0 [ 90.995568] [<ffffffff816b1929>] system_call_fastpath+0x16/0x1b [ 90.995630] -> #0 (&card->controls_rwsem){++++.+}: [ 90.995780] [<ffffffff810b7a47>] check_prevs_add+0x947/0x950 [ 90.995841] [<ffffffff810b8fa3>] __lock_acquire+0xb43/0x1330 [ 90.995901] [<ffffffff810b9f82>] lock_acquire+0xa2/0x120 [ 90.995962] [<ffffffff816a762b>] down_write+0x3b/0xa0 [ 90.996022] [<ffffffffa0177b08>] snd_ctl_dev_free+0x28/0x60 [snd] [ 90.996088] [<ffffffffa017a255>] snd_device_free+0x65/0x140 [snd] [ 90.996154] [<ffffffffa017a751>] snd_device_free_all+0x61/0xa0 [snd] [ 90.996219] [<ffffffffa0173af4>] snd_card_do_free+0x14/0x130 [snd] [ 90.996283] [<ffffffffa0173f14>] snd_card_free+0x84/0x90 [snd] [ 90.996349] [<ffffffffa0423397>] em28xx_audio_fini+0x97/0xb0 [em28xx_alsa] [ 90.996411] [<ffffffffa040dba6>] em28xx_close_extension+0x56/0x90 [em28xx] [ 90.996475] [<ffffffffa040f639>] em28xx_usb_disconnect+0x79/0x90 [em28xx] [ 90.996539] [<ffffffff814a06e7>] usb_unbind_interface+0x67/0x1d0 [ 90.996620] [<ffffffff8142920f>] __device_release_driver+0x7f/0xf0 [ 90.996682] [<ffffffff814292a5>] device_release_driver+0x25/0x40 [ 90.996742] [<ffffffff81428b0c>] bus_remove_device+0x11c/0x1a0 [ 90.996801] [<ffffffff81425536>] device_del+0x136/0x1d0 [ 90.996863] [<ffffffff8149e0c0>] usb_disable_device+0xb0/0x290 [ 90.996923] [<ffffffff814930c5>] usb_disconnect+0xb5/0x1d0 [ 90.996984] [<ffffffff81495ab6>] hub_port_connect_change+0xd6/0xad0 [ 90.997044] [<ffffffff814967c3>] hub_events+0x313/0x9b0 [ 90.997105] [<ffffffff81496e95>] hub_thread+0x35/0x170 [ 90.997165] [<ffffffff8108ea2f>] kthread+0xff/0x120 [ 90.997226] [<ffffffff816b187c>] ret_from_fork+0x7c/0xb0 [ 90.997287] [ 90.997287] other info that might help us debug this: [ 90.997287] [ 90.997318] Possible unsafe locking scenario: [ 90.997318] [ 90.997348] CPU0 CPU1 [ 90.997378] ---- ---- [ 90.997408] lock(&dev->lock); [ 90.997497] lock(&card->controls_rwsem); [ 90.997607] lock(&dev->lock); [ 90.997697] lock(&card->controls_rwsem); [ 90.997786] [ 90.997786] *** DEADLOCK *** [ 90.997786] [ 90.997817] 5 locks held by khubd/54: [ 90.997847] #0: (&__lockdep_no_validate__){......}, at: [<ffffffff81496564>] hub_events+0xb4/0x9b0 [ 90.998025] #1: (&__lockdep_no_validate__){......}, at: [<ffffffff81493076>] usb_disconnect+0x66/0x1d0 [ 90.998204] #2: (&__lockdep_no_validate__){......}, at: [<ffffffff8142929d>] device_release_driver+0x1d/0x40 [ 90.998383] #3: (em28xx_devlist_mutex){+.+.+.}, at: [<ffffffffa040db77>] em28xx_close_extension+0x27/0x90 [em28xx] [ 90.998567] #4: (&dev->lock){+.+.+.}, at: [<ffffffffa040db81>] em28xx_close_extension+0x31/0x90 [em28xx] Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com> Tested-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
1109 lines
27 KiB
C
1109 lines
27 KiB
C
/*
|
|
em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
|
|
|
|
Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
|
|
Markus Rechberger <mrechberger@gmail.com>
|
|
Mauro Carvalho Chehab <mchehab@infradead.org>
|
|
Sascha Sommer <saschasommer@freenet.de>
|
|
Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/list.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <sound/ac97_codec.h>
|
|
#include <media/v4l2-common.h>
|
|
|
|
#include "em28xx.h"
|
|
|
|
#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
|
|
"Markus Rechberger <mrechberger@gmail.com>, " \
|
|
"Mauro Carvalho Chehab <mchehab@infradead.org>, " \
|
|
"Sascha Sommer <saschasommer@freenet.de>"
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(EM28XX_VERSION);
|
|
|
|
/* #define ENABLE_DEBUG_ISOC_FRAMES */
|
|
|
|
static unsigned int core_debug;
|
|
module_param(core_debug, int, 0644);
|
|
MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
|
|
|
|
#define em28xx_coredbg(fmt, arg...) do {\
|
|
if (core_debug) \
|
|
printk(KERN_INFO "%s %s :"fmt, \
|
|
dev->name, __func__ , ##arg); } while (0)
|
|
|
|
static unsigned int reg_debug;
|
|
module_param(reg_debug, int, 0644);
|
|
MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
|
|
|
|
#define em28xx_regdbg(fmt, arg...) do {\
|
|
if (reg_debug) \
|
|
printk(KERN_INFO "%s %s :"fmt, \
|
|
dev->name, __func__ , ##arg); } while (0)
|
|
|
|
/* FIXME */
|
|
#define em28xx_isocdbg(fmt, arg...) do {\
|
|
if (core_debug) \
|
|
printk(KERN_INFO "%s %s :"fmt, \
|
|
dev->name, __func__ , ##arg); } while (0)
|
|
|
|
/*
|
|
* em28xx_read_reg_req()
|
|
* reads data from the usb device specifying bRequest
|
|
*/
|
|
int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
|
|
char *buf, int len)
|
|
{
|
|
int ret;
|
|
int pipe = usb_rcvctrlpipe(dev->udev, 0);
|
|
|
|
if (dev->disconnected)
|
|
return -ENODEV;
|
|
|
|
if (len > URB_MAX_CTRL_SIZE)
|
|
return -EINVAL;
|
|
|
|
if (reg_debug) {
|
|
printk(KERN_DEBUG "(pipe 0x%08x): "
|
|
"IN: %02x %02x %02x %02x %02x %02x %02x %02x ",
|
|
pipe,
|
|
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
req, 0, 0,
|
|
reg & 0xff, reg >> 8,
|
|
len & 0xff, len >> 8);
|
|
}
|
|
|
|
mutex_lock(&dev->ctrl_urb_lock);
|
|
ret = usb_control_msg(dev->udev, pipe, req,
|
|
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
0x0000, reg, dev->urb_buf, len, HZ);
|
|
if (ret < 0) {
|
|
if (reg_debug)
|
|
printk(" failed!\n");
|
|
mutex_unlock(&dev->ctrl_urb_lock);
|
|
return usb_translate_errors(ret);
|
|
}
|
|
|
|
if (len)
|
|
memcpy(buf, dev->urb_buf, len);
|
|
|
|
mutex_unlock(&dev->ctrl_urb_lock);
|
|
|
|
if (reg_debug) {
|
|
int byte;
|
|
|
|
printk("<<<");
|
|
for (byte = 0; byte < len; byte++)
|
|
printk(" %02x", (unsigned char)buf[byte]);
|
|
printk("\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* em28xx_read_reg_req()
|
|
* reads data from the usb device specifying bRequest
|
|
*/
|
|
int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg)
|
|
{
|
|
int ret;
|
|
u8 val;
|
|
|
|
ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return val;
|
|
}
|
|
|
|
int em28xx_read_reg(struct em28xx *dev, u16 reg)
|
|
{
|
|
return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_read_reg);
|
|
|
|
/*
|
|
* em28xx_write_regs_req()
|
|
* sends data to the usb device, specifying bRequest
|
|
*/
|
|
int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
|
|
int len)
|
|
{
|
|
int ret;
|
|
int pipe = usb_sndctrlpipe(dev->udev, 0);
|
|
|
|
if (dev->disconnected)
|
|
return -ENODEV;
|
|
|
|
if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
|
|
return -EINVAL;
|
|
|
|
if (reg_debug) {
|
|
int byte;
|
|
|
|
printk(KERN_DEBUG "(pipe 0x%08x): "
|
|
"OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
|
|
pipe,
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
req, 0, 0,
|
|
reg & 0xff, reg >> 8,
|
|
len & 0xff, len >> 8);
|
|
|
|
for (byte = 0; byte < len; byte++)
|
|
printk(" %02x", (unsigned char)buf[byte]);
|
|
printk("\n");
|
|
}
|
|
|
|
mutex_lock(&dev->ctrl_urb_lock);
|
|
memcpy(dev->urb_buf, buf, len);
|
|
ret = usb_control_msg(dev->udev, pipe, req,
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
0x0000, reg, dev->urb_buf, len, HZ);
|
|
mutex_unlock(&dev->ctrl_urb_lock);
|
|
|
|
if (ret < 0)
|
|
return usb_translate_errors(ret);
|
|
|
|
if (dev->wait_after_write)
|
|
msleep(dev->wait_after_write);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
|
|
{
|
|
return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_write_regs);
|
|
|
|
/* Write a single register */
|
|
int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
|
|
{
|
|
return em28xx_write_regs(dev, reg, &val, 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_write_reg);
|
|
|
|
/*
|
|
* em28xx_write_reg_bits()
|
|
* sets only some bits (specified by bitmask) of a register, by first reading
|
|
* the actual value
|
|
*/
|
|
int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
|
|
u8 bitmask)
|
|
{
|
|
int oldval;
|
|
u8 newval;
|
|
|
|
oldval = em28xx_read_reg(dev, reg);
|
|
if (oldval < 0)
|
|
return oldval;
|
|
|
|
newval = (((u8) oldval) & ~bitmask) | (val & bitmask);
|
|
|
|
return em28xx_write_regs(dev, reg, &newval, 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_write_reg_bits);
|
|
|
|
/*
|
|
* em28xx_toggle_reg_bits()
|
|
* toggles/inverts the bits (specified by bitmask) of a register
|
|
*/
|
|
int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask)
|
|
{
|
|
int oldval;
|
|
u8 newval;
|
|
|
|
oldval = em28xx_read_reg(dev, reg);
|
|
if (oldval < 0)
|
|
return oldval;
|
|
|
|
newval = (~oldval & bitmask) | (oldval & ~bitmask);
|
|
|
|
return em28xx_write_reg(dev, reg, newval);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits);
|
|
|
|
/*
|
|
* em28xx_is_ac97_ready()
|
|
* Checks if ac97 is ready
|
|
*/
|
|
static int em28xx_is_ac97_ready(struct em28xx *dev)
|
|
{
|
|
unsigned long timeout = jiffies + msecs_to_jiffies(EM28XX_AC97_XFER_TIMEOUT);
|
|
int ret;
|
|
|
|
/* Wait up to 50 ms for AC97 command to complete */
|
|
while (time_is_after_jiffies(timeout)) {
|
|
ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!(ret & 0x01))
|
|
return 0;
|
|
msleep(5);
|
|
}
|
|
|
|
em28xx_warn("AC97 command still being executed: not handled properly!\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* em28xx_read_ac97()
|
|
* write a 16 bit value to the specified AC97 address (LSB first!)
|
|
*/
|
|
int em28xx_read_ac97(struct em28xx *dev, u8 reg)
|
|
{
|
|
int ret;
|
|
u8 addr = (reg & 0x7f) | 0x80;
|
|
u16 val;
|
|
|
|
ret = em28xx_is_ac97_ready(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
|
|
(u8 *)&val, sizeof(val));
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
return le16_to_cpu(val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_read_ac97);
|
|
|
|
/*
|
|
* em28xx_write_ac97()
|
|
* write a 16 bit value to the specified AC97 address (LSB first!)
|
|
*/
|
|
int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
|
|
{
|
|
int ret;
|
|
u8 addr = reg & 0x7f;
|
|
__le16 value;
|
|
|
|
value = cpu_to_le16(val);
|
|
|
|
ret = em28xx_is_ac97_ready(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *) &value, 2);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_write_ac97);
|
|
|
|
struct em28xx_vol_itable {
|
|
enum em28xx_amux mux;
|
|
u8 reg;
|
|
};
|
|
|
|
static struct em28xx_vol_itable inputs[] = {
|
|
{ EM28XX_AMUX_VIDEO, AC97_VIDEO },
|
|
{ EM28XX_AMUX_LINE_IN, AC97_LINE },
|
|
{ EM28XX_AMUX_PHONE, AC97_PHONE },
|
|
{ EM28XX_AMUX_MIC, AC97_MIC },
|
|
{ EM28XX_AMUX_CD, AC97_CD },
|
|
{ EM28XX_AMUX_AUX, AC97_AUX },
|
|
{ EM28XX_AMUX_PCM_OUT, AC97_PCM },
|
|
};
|
|
|
|
static int set_ac97_input(struct em28xx *dev)
|
|
{
|
|
int ret, i;
|
|
enum em28xx_amux amux = dev->ctl_ainput;
|
|
|
|
/* EM28XX_AMUX_VIDEO2 is a special case used to indicate that
|
|
em28xx should point to LINE IN, while AC97 should use VIDEO
|
|
*/
|
|
if (amux == EM28XX_AMUX_VIDEO2)
|
|
amux = EM28XX_AMUX_VIDEO;
|
|
|
|
/* Mute all entres but the one that were selected */
|
|
for (i = 0; i < ARRAY_SIZE(inputs); i++) {
|
|
if (amux == inputs[i].mux)
|
|
ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
|
|
else
|
|
ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
|
|
|
|
if (ret < 0)
|
|
em28xx_warn("couldn't setup AC97 register %d\n",
|
|
inputs[i].reg);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int em28xx_set_audio_source(struct em28xx *dev)
|
|
{
|
|
int ret;
|
|
u8 input;
|
|
|
|
if (dev->board.is_em2800) {
|
|
if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
|
|
input = EM2800_AUDIO_SRC_TUNER;
|
|
else
|
|
input = EM2800_AUDIO_SRC_LINE;
|
|
|
|
ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (dev->board.has_msp34xx)
|
|
input = EM28XX_AUDIO_SRC_TUNER;
|
|
else {
|
|
switch (dev->ctl_ainput) {
|
|
case EM28XX_AMUX_VIDEO:
|
|
input = EM28XX_AUDIO_SRC_TUNER;
|
|
break;
|
|
default:
|
|
input = EM28XX_AUDIO_SRC_LINE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (dev->board.mute_gpio && dev->mute)
|
|
em28xx_gpio_set(dev, dev->board.mute_gpio);
|
|
else
|
|
em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
|
|
|
|
ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
|
|
if (ret < 0)
|
|
return ret;
|
|
msleep(5);
|
|
|
|
switch (dev->audio_mode.ac97) {
|
|
case EM28XX_NO_AC97:
|
|
break;
|
|
default:
|
|
ret = set_ac97_input(dev);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct em28xx_vol_otable {
|
|
enum em28xx_aout mux;
|
|
u8 reg;
|
|
};
|
|
|
|
static const struct em28xx_vol_otable outputs[] = {
|
|
{ EM28XX_AOUT_MASTER, AC97_MASTER },
|
|
{ EM28XX_AOUT_LINE, AC97_HEADPHONE },
|
|
{ EM28XX_AOUT_MONO, AC97_MASTER_MONO },
|
|
{ EM28XX_AOUT_LFE, AC97_CENTER_LFE_MASTER },
|
|
{ EM28XX_AOUT_SURR, AC97_SURROUND_MASTER },
|
|
};
|
|
|
|
int em28xx_audio_analog_set(struct em28xx *dev)
|
|
{
|
|
int ret, i;
|
|
u8 xclk;
|
|
|
|
if (!dev->audio_mode.has_audio)
|
|
return 0;
|
|
|
|
/* It is assumed that all devices use master volume for output.
|
|
It would be possible to use also line output.
|
|
*/
|
|
if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
|
|
/* Mute all outputs */
|
|
for (i = 0; i < ARRAY_SIZE(outputs); i++) {
|
|
ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
|
|
if (ret < 0)
|
|
em28xx_warn("couldn't setup AC97 register %d\n",
|
|
outputs[i].reg);
|
|
}
|
|
}
|
|
|
|
xclk = dev->board.xclk & 0x7f;
|
|
if (!dev->mute)
|
|
xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
|
|
|
|
ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
|
|
if (ret < 0)
|
|
return ret;
|
|
msleep(10);
|
|
|
|
/* Selects the proper audio input */
|
|
ret = em28xx_set_audio_source(dev);
|
|
|
|
/* Sets volume */
|
|
if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
|
|
int vol;
|
|
|
|
em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200);
|
|
em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031);
|
|
em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80);
|
|
|
|
/* LSB: left channel - both channels with the same level */
|
|
vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
|
|
|
|
/* Mute device, if needed */
|
|
if (dev->mute)
|
|
vol |= 0x8000;
|
|
|
|
/* Sets volume */
|
|
for (i = 0; i < ARRAY_SIZE(outputs); i++) {
|
|
if (dev->ctl_aoutput & outputs[i].mux)
|
|
ret = em28xx_write_ac97(dev, outputs[i].reg,
|
|
vol);
|
|
if (ret < 0)
|
|
em28xx_warn("couldn't setup AC97 register %d\n",
|
|
outputs[i].reg);
|
|
}
|
|
|
|
if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
|
|
int sel = ac97_return_record_select(dev->ctl_aoutput);
|
|
|
|
/* Use the same input for both left and right
|
|
channels */
|
|
sel |= (sel << 8);
|
|
|
|
em28xx_write_ac97(dev, AC97_REC_SEL, sel);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
|
|
|
|
int em28xx_audio_setup(struct em28xx *dev)
|
|
{
|
|
int vid1, vid2, feat, cfg;
|
|
u32 vid;
|
|
|
|
if (!dev->audio_mode.has_audio)
|
|
return 0;
|
|
|
|
/* See how this device is configured */
|
|
cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
|
|
em28xx_info("Config register raw data: 0x%02x\n", cfg);
|
|
if (cfg < 0) {
|
|
/* Register read error? */
|
|
cfg = EM28XX_CHIPCFG_AC97; /* Be conservative */
|
|
} else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) {
|
|
/* The device doesn't have vendor audio at all */
|
|
dev->has_alsa_audio = false;
|
|
dev->audio_mode.has_audio = false;
|
|
return 0;
|
|
} else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
|
|
if (dev->chip_id < CHIP_ID_EM2860 &&
|
|
(cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
|
|
EM2820_CHIPCFG_I2S_1_SAMPRATE)
|
|
dev->audio_mode.i2s_samplerates = 1;
|
|
else if (dev->chip_id >= CHIP_ID_EM2860 &&
|
|
(cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
|
|
EM2860_CHIPCFG_I2S_5_SAMPRATES)
|
|
dev->audio_mode.i2s_samplerates = 5;
|
|
else
|
|
dev->audio_mode.i2s_samplerates = 3;
|
|
em28xx_info("I2S Audio (%d sample rate(s))\n",
|
|
dev->audio_mode.i2s_samplerates);
|
|
/* Skip the code that does AC97 vendor detection */
|
|
dev->audio_mode.ac97 = EM28XX_NO_AC97;
|
|
goto init_audio;
|
|
}
|
|
|
|
dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
|
|
|
|
vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
|
|
if (vid1 < 0) {
|
|
/*
|
|
* Device likely doesn't support AC97
|
|
* Note: (some) em2800 devices without eeprom reports 0x91 on
|
|
* CHIPCFG register, even not having an AC97 chip
|
|
*/
|
|
em28xx_warn("AC97 chip type couldn't be determined\n");
|
|
dev->audio_mode.ac97 = EM28XX_NO_AC97;
|
|
dev->has_alsa_audio = false;
|
|
dev->audio_mode.has_audio = false;
|
|
goto init_audio;
|
|
}
|
|
|
|
vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
|
|
if (vid2 < 0)
|
|
goto init_audio;
|
|
|
|
vid = vid1 << 16 | vid2;
|
|
|
|
dev->audio_mode.ac97_vendor_id = vid;
|
|
em28xx_warn("AC97 vendor ID = 0x%08x\n", vid);
|
|
|
|
feat = em28xx_read_ac97(dev, AC97_RESET);
|
|
if (feat < 0)
|
|
goto init_audio;
|
|
|
|
dev->audio_mode.ac97_feat = feat;
|
|
em28xx_warn("AC97 features = 0x%04x\n", feat);
|
|
|
|
/* Try to identify what audio processor we have */
|
|
if (((vid == 0xffffffff) || (vid == 0x83847650)) && (feat == 0x6a90))
|
|
dev->audio_mode.ac97 = EM28XX_AC97_EM202;
|
|
else if ((vid >> 8) == 0x838476)
|
|
dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
|
|
|
|
init_audio:
|
|
/* Reports detected AC97 processor */
|
|
switch (dev->audio_mode.ac97) {
|
|
case EM28XX_NO_AC97:
|
|
em28xx_info("No AC97 audio processor\n");
|
|
break;
|
|
case EM28XX_AC97_EM202:
|
|
em28xx_info("Empia 202 AC97 audio processor detected\n");
|
|
break;
|
|
case EM28XX_AC97_SIGMATEL:
|
|
em28xx_info("Sigmatel audio processor detected(stac 97%02x)\n",
|
|
dev->audio_mode.ac97_vendor_id & 0xff);
|
|
break;
|
|
case EM28XX_AC97_OTHER:
|
|
em28xx_warn("Unknown AC97 audio processor detected!\n");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return em28xx_audio_analog_set(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_audio_setup);
|
|
|
|
const struct em28xx_led *em28xx_find_led(struct em28xx *dev,
|
|
enum em28xx_led_role role)
|
|
{
|
|
if (dev->board.leds) {
|
|
u8 k = 0;
|
|
while (dev->board.leds[k].role >= 0 &&
|
|
dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) {
|
|
if (dev->board.leds[k].role == role)
|
|
return &dev->board.leds[k];
|
|
k++;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_find_led);
|
|
|
|
int em28xx_capture_start(struct em28xx *dev, int start)
|
|
{
|
|
int rc;
|
|
|
|
if (dev->chip_id == CHIP_ID_EM2874 ||
|
|
dev->chip_id == CHIP_ID_EM2884 ||
|
|
dev->chip_id == CHIP_ID_EM28174 ||
|
|
dev->chip_id == CHIP_ID_EM28178) {
|
|
/* The Transport Stream Enable Register moved in em2874 */
|
|
rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
|
|
start ?
|
|
EM2874_TS1_CAPTURE_ENABLE : 0x00,
|
|
EM2874_TS1_CAPTURE_ENABLE);
|
|
} else {
|
|
/* FIXME: which is the best order? */
|
|
/* video registers are sampled by VREF */
|
|
rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
|
|
start ? 0x10 : 0x00, 0x10);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (start) {
|
|
if (dev->board.is_webcam)
|
|
rc = em28xx_write_reg(dev, 0x13, 0x0c);
|
|
|
|
/* Enable video capture */
|
|
rc = em28xx_write_reg(dev, 0x48, 0x00);
|
|
|
|
if (dev->mode == EM28XX_ANALOG_MODE)
|
|
rc = em28xx_write_reg(dev,
|
|
EM28XX_R12_VINENABLE, 0x67);
|
|
else
|
|
rc = em28xx_write_reg(dev,
|
|
EM28XX_R12_VINENABLE, 0x37);
|
|
|
|
msleep(6);
|
|
} else {
|
|
/* disable video capture */
|
|
rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
|
|
}
|
|
}
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* Switch (explicitly controlled) analog capturing LED on/off */
|
|
if (dev->mode == EM28XX_ANALOG_MODE) {
|
|
const struct em28xx_led *led;
|
|
led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING);
|
|
if (led)
|
|
em28xx_write_reg_bits(dev, led->gpio_reg,
|
|
(!start ^ led->inverted) ?
|
|
~led->gpio_mask : led->gpio_mask,
|
|
led->gpio_mask);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (!gpio)
|
|
return rc;
|
|
|
|
if (dev->mode != EM28XX_SUSPEND) {
|
|
em28xx_write_reg(dev, 0x48, 0x00);
|
|
if (dev->mode == EM28XX_ANALOG_MODE)
|
|
em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
|
|
else
|
|
em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
|
|
msleep(6);
|
|
}
|
|
|
|
/* Send GPIO reset sequences specified at board entry */
|
|
while (gpio->sleep >= 0) {
|
|
if (gpio->reg >= 0) {
|
|
rc = em28xx_write_reg_bits(dev,
|
|
gpio->reg,
|
|
gpio->val,
|
|
gpio->mask);
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
if (gpio->sleep > 0)
|
|
msleep(gpio->sleep);
|
|
|
|
gpio++;
|
|
}
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_gpio_set);
|
|
|
|
int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
|
|
{
|
|
if (dev->mode == set_mode)
|
|
return 0;
|
|
|
|
if (set_mode == EM28XX_SUSPEND) {
|
|
dev->mode = set_mode;
|
|
|
|
/* FIXME: add suspend support for ac97 */
|
|
|
|
return em28xx_gpio_set(dev, dev->board.suspend_gpio);
|
|
}
|
|
|
|
dev->mode = set_mode;
|
|
|
|
if (dev->mode == EM28XX_DIGITAL_MODE)
|
|
return em28xx_gpio_set(dev, dev->board.dvb_gpio);
|
|
else
|
|
return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_set_mode);
|
|
|
|
/* ------------------------------------------------------------------
|
|
URB control
|
|
------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* URB completion handler for isoc/bulk transfers
|
|
*/
|
|
static void em28xx_irq_callback(struct urb *urb)
|
|
{
|
|
struct em28xx *dev = urb->context;
|
|
int i;
|
|
|
|
switch (urb->status) {
|
|
case 0: /* success */
|
|
case -ETIMEDOUT: /* NAK */
|
|
break;
|
|
case -ECONNRESET: /* kill */
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
return;
|
|
default: /* error */
|
|
em28xx_isocdbg("urb completition error %d.\n", urb->status);
|
|
break;
|
|
}
|
|
|
|
/* Copy data from URB */
|
|
spin_lock(&dev->slock);
|
|
dev->usb_ctl.urb_data_copy(dev, urb);
|
|
spin_unlock(&dev->slock);
|
|
|
|
/* Reset urb buffers */
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
|
/* isoc only (bulk: number_of_packets = 0) */
|
|
urb->iso_frame_desc[i].status = 0;
|
|
urb->iso_frame_desc[i].actual_length = 0;
|
|
}
|
|
urb->status = 0;
|
|
|
|
urb->status = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (urb->status) {
|
|
em28xx_isocdbg("urb resubmit failed (error=%i)\n",
|
|
urb->status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Stop and Deallocate URBs
|
|
*/
|
|
void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode)
|
|
{
|
|
struct urb *urb;
|
|
struct em28xx_usb_bufs *usb_bufs;
|
|
int i;
|
|
|
|
em28xx_isocdbg("em28xx: called em28xx_uninit_usb_xfer in mode %d\n",
|
|
mode);
|
|
|
|
if (mode == EM28XX_DIGITAL_MODE)
|
|
usb_bufs = &dev->usb_ctl.digital_bufs;
|
|
else
|
|
usb_bufs = &dev->usb_ctl.analog_bufs;
|
|
|
|
for (i = 0; i < usb_bufs->num_bufs; i++) {
|
|
urb = usb_bufs->urb[i];
|
|
if (urb) {
|
|
if (!irqs_disabled())
|
|
usb_kill_urb(urb);
|
|
else
|
|
usb_unlink_urb(urb);
|
|
|
|
if (usb_bufs->transfer_buffer[i]) {
|
|
usb_free_coherent(dev->udev,
|
|
urb->transfer_buffer_length,
|
|
usb_bufs->transfer_buffer[i],
|
|
urb->transfer_dma);
|
|
}
|
|
usb_free_urb(urb);
|
|
usb_bufs->urb[i] = NULL;
|
|
}
|
|
usb_bufs->transfer_buffer[i] = NULL;
|
|
}
|
|
|
|
kfree(usb_bufs->urb);
|
|
kfree(usb_bufs->transfer_buffer);
|
|
|
|
usb_bufs->urb = NULL;
|
|
usb_bufs->transfer_buffer = NULL;
|
|
usb_bufs->num_bufs = 0;
|
|
|
|
em28xx_capture_start(dev, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer);
|
|
|
|
/*
|
|
* Stop URBs
|
|
*/
|
|
void em28xx_stop_urbs(struct em28xx *dev)
|
|
{
|
|
int i;
|
|
struct urb *urb;
|
|
struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs;
|
|
|
|
em28xx_isocdbg("em28xx: called em28xx_stop_urbs\n");
|
|
|
|
for (i = 0; i < isoc_bufs->num_bufs; i++) {
|
|
urb = isoc_bufs->urb[i];
|
|
if (urb) {
|
|
if (!irqs_disabled())
|
|
usb_kill_urb(urb);
|
|
else
|
|
usb_unlink_urb(urb);
|
|
}
|
|
}
|
|
|
|
em28xx_capture_start(dev, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
|
|
|
|
/*
|
|
* Allocate URBs
|
|
*/
|
|
int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
|
|
int num_bufs, int max_pkt_size, int packet_multiplier)
|
|
{
|
|
struct em28xx_usb_bufs *usb_bufs;
|
|
int i;
|
|
int sb_size, pipe;
|
|
struct urb *urb;
|
|
int j, k;
|
|
|
|
em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
|
|
|
|
/* Check mode and if we have an endpoint for the selected
|
|
transfer type, select buffer */
|
|
if (mode == EM28XX_DIGITAL_MODE) {
|
|
if ((xfer_bulk && !dev->dvb_ep_bulk) ||
|
|
(!xfer_bulk && !dev->dvb_ep_isoc)) {
|
|
em28xx_errdev("no endpoint for DVB mode and transfer type %d\n",
|
|
xfer_bulk > 0);
|
|
return -EINVAL;
|
|
}
|
|
usb_bufs = &dev->usb_ctl.digital_bufs;
|
|
} else if (mode == EM28XX_ANALOG_MODE) {
|
|
if ((xfer_bulk && !dev->analog_ep_bulk) ||
|
|
(!xfer_bulk && !dev->analog_ep_isoc)) {
|
|
em28xx_errdev("no endpoint for analog mode and transfer type %d\n",
|
|
xfer_bulk > 0);
|
|
return -EINVAL;
|
|
}
|
|
usb_bufs = &dev->usb_ctl.analog_bufs;
|
|
} else {
|
|
em28xx_errdev("invalid mode selected\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* De-allocates all pending stuff */
|
|
em28xx_uninit_usb_xfer(dev, mode);
|
|
|
|
usb_bufs->num_bufs = num_bufs;
|
|
|
|
usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
|
|
if (!usb_bufs->urb) {
|
|
em28xx_errdev("cannot alloc memory for usb buffers\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
|
|
GFP_KERNEL);
|
|
if (!usb_bufs->transfer_buffer) {
|
|
em28xx_errdev("cannot allocate memory for usb transfer\n");
|
|
kfree(usb_bufs->urb);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
usb_bufs->max_pkt_size = max_pkt_size;
|
|
if (xfer_bulk)
|
|
usb_bufs->num_packets = 0;
|
|
else
|
|
usb_bufs->num_packets = packet_multiplier;
|
|
dev->usb_ctl.vid_buf = NULL;
|
|
dev->usb_ctl.vbi_buf = NULL;
|
|
|
|
sb_size = packet_multiplier * usb_bufs->max_pkt_size;
|
|
|
|
/* allocate urbs and transfer buffers */
|
|
for (i = 0; i < usb_bufs->num_bufs; i++) {
|
|
urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
|
|
if (!urb) {
|
|
em28xx_err("cannot alloc usb_ctl.urb %i\n", i);
|
|
em28xx_uninit_usb_xfer(dev, mode);
|
|
return -ENOMEM;
|
|
}
|
|
usb_bufs->urb[i] = urb;
|
|
|
|
usb_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
|
|
sb_size, GFP_KERNEL, &urb->transfer_dma);
|
|
if (!usb_bufs->transfer_buffer[i]) {
|
|
em28xx_err("unable to allocate %i bytes for transfer"
|
|
" buffer %i%s\n",
|
|
sb_size, i,
|
|
in_interrupt() ? " while in int" : "");
|
|
em28xx_uninit_usb_xfer(dev, mode);
|
|
return -ENOMEM;
|
|
}
|
|
memset(usb_bufs->transfer_buffer[i], 0, sb_size);
|
|
|
|
if (xfer_bulk) { /* bulk */
|
|
pipe = usb_rcvbulkpipe(dev->udev,
|
|
mode == EM28XX_ANALOG_MODE ?
|
|
dev->analog_ep_bulk :
|
|
dev->dvb_ep_bulk);
|
|
usb_fill_bulk_urb(urb, dev->udev, pipe,
|
|
usb_bufs->transfer_buffer[i], sb_size,
|
|
em28xx_irq_callback, dev);
|
|
urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
|
|
} else { /* isoc */
|
|
pipe = usb_rcvisocpipe(dev->udev,
|
|
mode == EM28XX_ANALOG_MODE ?
|
|
dev->analog_ep_isoc :
|
|
dev->dvb_ep_isoc);
|
|
usb_fill_int_urb(urb, dev->udev, pipe,
|
|
usb_bufs->transfer_buffer[i], sb_size,
|
|
em28xx_irq_callback, dev, 1);
|
|
urb->transfer_flags = URB_ISO_ASAP |
|
|
URB_NO_TRANSFER_DMA_MAP;
|
|
k = 0;
|
|
for (j = 0; j < usb_bufs->num_packets; j++) {
|
|
urb->iso_frame_desc[j].offset = k;
|
|
urb->iso_frame_desc[j].length =
|
|
usb_bufs->max_pkt_size;
|
|
k += usb_bufs->max_pkt_size;
|
|
}
|
|
}
|
|
|
|
urb->number_of_packets = usb_bufs->num_packets;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
|
|
|
|
/*
|
|
* Allocate URBs and start IRQ
|
|
*/
|
|
int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
|
|
int xfer_bulk, int num_bufs, int max_pkt_size,
|
|
int packet_multiplier,
|
|
int (*urb_data_copy) (struct em28xx *dev, struct urb *urb))
|
|
{
|
|
struct em28xx_dmaqueue *dma_q = &dev->vidq;
|
|
struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
|
|
struct em28xx_usb_bufs *usb_bufs;
|
|
int i;
|
|
int rc;
|
|
int alloc;
|
|
|
|
em28xx_isocdbg("em28xx: called em28xx_init_usb_xfer in mode %d\n",
|
|
mode);
|
|
|
|
dev->usb_ctl.urb_data_copy = urb_data_copy;
|
|
|
|
if (mode == EM28XX_DIGITAL_MODE) {
|
|
usb_bufs = &dev->usb_ctl.digital_bufs;
|
|
/* no need to free/alloc usb buffers in digital mode */
|
|
alloc = 0;
|
|
} else {
|
|
usb_bufs = &dev->usb_ctl.analog_bufs;
|
|
alloc = 1;
|
|
}
|
|
|
|
if (alloc) {
|
|
rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs,
|
|
max_pkt_size, packet_multiplier);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
|
|
if (xfer_bulk) {
|
|
rc = usb_clear_halt(dev->udev, usb_bufs->urb[0]->pipe);
|
|
if (rc < 0) {
|
|
em28xx_err("failed to clear USB bulk endpoint stall/halt condition (error=%i)\n",
|
|
rc);
|
|
em28xx_uninit_usb_xfer(dev, mode);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
init_waitqueue_head(&dma_q->wq);
|
|
init_waitqueue_head(&vbi_dma_q->wq);
|
|
|
|
em28xx_capture_start(dev, 1);
|
|
|
|
/* submit urbs and enables IRQ */
|
|
for (i = 0; i < usb_bufs->num_bufs; i++) {
|
|
rc = usb_submit_urb(usb_bufs->urb[i], GFP_ATOMIC);
|
|
if (rc) {
|
|
em28xx_err("submit of urb %i failed (error=%i)\n", i,
|
|
rc);
|
|
em28xx_uninit_usb_xfer(dev, mode);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer);
|
|
|
|
/*
|
|
* Device control list
|
|
*/
|
|
|
|
static LIST_HEAD(em28xx_devlist);
|
|
static DEFINE_MUTEX(em28xx_devlist_mutex);
|
|
|
|
/*
|
|
* Extension interface
|
|
*/
|
|
|
|
static LIST_HEAD(em28xx_extension_devlist);
|
|
|
|
int em28xx_register_extension(struct em28xx_ops *ops)
|
|
{
|
|
struct em28xx *dev = NULL;
|
|
|
|
mutex_lock(&em28xx_devlist_mutex);
|
|
list_add_tail(&ops->next, &em28xx_extension_devlist);
|
|
list_for_each_entry(dev, &em28xx_devlist, devlist) {
|
|
ops->init(dev);
|
|
}
|
|
mutex_unlock(&em28xx_devlist_mutex);
|
|
printk(KERN_INFO "em28xx: Registered (%s) extension\n", ops->name);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(em28xx_register_extension);
|
|
|
|
void em28xx_unregister_extension(struct em28xx_ops *ops)
|
|
{
|
|
struct em28xx *dev = NULL;
|
|
|
|
mutex_lock(&em28xx_devlist_mutex);
|
|
list_for_each_entry(dev, &em28xx_devlist, devlist) {
|
|
ops->fini(dev);
|
|
}
|
|
list_del(&ops->next);
|
|
mutex_unlock(&em28xx_devlist_mutex);
|
|
printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
|
|
}
|
|
EXPORT_SYMBOL(em28xx_unregister_extension);
|
|
|
|
void em28xx_init_extension(struct em28xx *dev)
|
|
{
|
|
const struct em28xx_ops *ops = NULL;
|
|
|
|
mutex_lock(&em28xx_devlist_mutex);
|
|
list_add_tail(&dev->devlist, &em28xx_devlist);
|
|
list_for_each_entry(ops, &em28xx_extension_devlist, next) {
|
|
if (ops->init)
|
|
ops->init(dev);
|
|
}
|
|
mutex_unlock(&em28xx_devlist_mutex);
|
|
}
|
|
|
|
void em28xx_close_extension(struct em28xx *dev)
|
|
{
|
|
const struct em28xx_ops *ops = NULL;
|
|
|
|
mutex_lock(&em28xx_devlist_mutex);
|
|
list_for_each_entry(ops, &em28xx_extension_devlist, next) {
|
|
if (ops->fini)
|
|
ops->fini(dev);
|
|
}
|
|
list_del(&dev->devlist);
|
|
mutex_unlock(&em28xx_devlist_mutex);
|
|
}
|