442 lines
10 KiB
C
442 lines
10 KiB
C
/*
|
|
* STK1160 driver
|
|
*
|
|
* Copyright (C) 2012 Ezequiel Garcia
|
|
* <elezegarcia--a.t--gmail.com>
|
|
*
|
|
* Based on Easycap driver by R.M. Thomas
|
|
* Copyright (C) 2010 R.M. Thomas
|
|
* <rmthomas--a.t--sciolus.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* TODO:
|
|
*
|
|
* 1. Support stream at lower speed: lower frame rate or lower frame size.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/usb.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <media/i2c/saa7115.h>
|
|
|
|
#include "stk1160.h"
|
|
#include "stk1160-reg.h"
|
|
|
|
static unsigned int input;
|
|
module_param(input, int, 0644);
|
|
MODULE_PARM_DESC(input, "Set default input");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Ezequiel Garcia");
|
|
MODULE_DESCRIPTION("STK1160 driver");
|
|
|
|
/* Devices supported by this driver */
|
|
static const struct usb_device_id stk1160_id_table[] = {
|
|
{ USB_DEVICE(0x05e1, 0x0408) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, stk1160_id_table);
|
|
|
|
/* saa7113 I2C address */
|
|
static unsigned short saa7113_addrs[] = {
|
|
0x4a >> 1,
|
|
I2C_CLIENT_END
|
|
};
|
|
|
|
/*
|
|
* Read/Write stk registers
|
|
*/
|
|
int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value)
|
|
{
|
|
int ret;
|
|
int pipe = usb_rcvctrlpipe(dev->udev, 0);
|
|
u8 *buf;
|
|
|
|
*value = 0;
|
|
|
|
buf = kmalloc(sizeof(u8), GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
ret = usb_control_msg(dev->udev, pipe, 0x00,
|
|
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
0x00, reg, buf, sizeof(u8), HZ);
|
|
if (ret < 0) {
|
|
stk1160_err("read failed on reg 0x%x (%d)\n",
|
|
reg, ret);
|
|
kfree(buf);
|
|
return ret;
|
|
}
|
|
|
|
*value = *buf;
|
|
kfree(buf);
|
|
return 0;
|
|
}
|
|
|
|
int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value)
|
|
{
|
|
int ret;
|
|
int pipe = usb_sndctrlpipe(dev->udev, 0);
|
|
|
|
ret = usb_control_msg(dev->udev, pipe, 0x01,
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
value, reg, NULL, 0, HZ);
|
|
if (ret < 0) {
|
|
stk1160_err("write failed on reg 0x%x (%d)\n",
|
|
reg, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void stk1160_select_input(struct stk1160 *dev)
|
|
{
|
|
int route;
|
|
static const u8 gctrl[] = {
|
|
0x98, 0x90, 0x88, 0x80, 0x98
|
|
};
|
|
|
|
if (dev->ctl_input == STK1160_SVIDEO_INPUT)
|
|
route = SAA7115_SVIDEO3;
|
|
else
|
|
route = SAA7115_COMPOSITE0;
|
|
|
|
if (dev->ctl_input < ARRAY_SIZE(gctrl)) {
|
|
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
|
|
route, 0, 0);
|
|
stk1160_write_reg(dev, STK1160_GCTRL, gctrl[dev->ctl_input]);
|
|
}
|
|
}
|
|
|
|
/* TODO: We should break this into pieces */
|
|
static void stk1160_reg_reset(struct stk1160 *dev)
|
|
{
|
|
int i;
|
|
|
|
static const struct regval ctl[] = {
|
|
{STK1160_GCTRL+2, 0x0078},
|
|
|
|
{STK1160_RMCTL+1, 0x0000},
|
|
{STK1160_RMCTL+3, 0x0002},
|
|
|
|
{STK1160_PLLSO, 0x0010},
|
|
{STK1160_PLLSO+1, 0x0000},
|
|
{STK1160_PLLSO+2, 0x0014},
|
|
{STK1160_PLLSO+3, 0x000E},
|
|
|
|
{STK1160_PLLFD, 0x0046},
|
|
|
|
/* Timing generator setup */
|
|
{STK1160_TIGEN, 0x0012},
|
|
{STK1160_TICTL, 0x002D},
|
|
{STK1160_TICTL+1, 0x0001},
|
|
{STK1160_TICTL+2, 0x0000},
|
|
{STK1160_TICTL+3, 0x0000},
|
|
{STK1160_TIGEN, 0x0080},
|
|
|
|
{0xffff, 0xffff}
|
|
};
|
|
|
|
for (i = 0; ctl[i].reg != 0xffff; i++)
|
|
stk1160_write_reg(dev, ctl[i].reg, ctl[i].val);
|
|
}
|
|
|
|
static void stk1160_release(struct v4l2_device *v4l2_dev)
|
|
{
|
|
struct stk1160 *dev = container_of(v4l2_dev, struct stk1160, v4l2_dev);
|
|
|
|
stk1160_dbg("releasing all resources\n");
|
|
|
|
stk1160_i2c_unregister(dev);
|
|
|
|
v4l2_ctrl_handler_free(&dev->ctrl_handler);
|
|
v4l2_device_unregister(&dev->v4l2_dev);
|
|
mutex_destroy(&dev->v4l_lock);
|
|
mutex_destroy(&dev->vb_queue_lock);
|
|
kfree(dev->alt_max_pkt_size);
|
|
kfree(dev);
|
|
}
|
|
|
|
/* high bandwidth multiplier, as encoded in highspeed endpoint descriptors */
|
|
#define hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03))
|
|
|
|
/*
|
|
* Scan usb interface and populate max_pkt_size array
|
|
* with information on each alternate setting.
|
|
* The array should be allocated by the caller.
|
|
*/
|
|
static int stk1160_scan_usb(struct usb_interface *intf, struct usb_device *udev,
|
|
unsigned int *max_pkt_size)
|
|
{
|
|
int i, e, sizedescr, size, ifnum;
|
|
const struct usb_endpoint_descriptor *desc;
|
|
|
|
bool has_video = false, has_audio = false;
|
|
const char *speed;
|
|
|
|
ifnum = intf->altsetting[0].desc.bInterfaceNumber;
|
|
|
|
/* Get endpoints */
|
|
for (i = 0; i < intf->num_altsetting; i++) {
|
|
|
|
for (e = 0; e < intf->altsetting[i].desc.bNumEndpoints; e++) {
|
|
|
|
/* This isn't clear enough, at least to me */
|
|
desc = &intf->altsetting[i].endpoint[e].desc;
|
|
sizedescr = le16_to_cpu(desc->wMaxPacketSize);
|
|
size = sizedescr & 0x7ff;
|
|
|
|
if (udev->speed == USB_SPEED_HIGH)
|
|
size = size * hb_mult(sizedescr);
|
|
|
|
if (usb_endpoint_xfer_isoc(desc) &&
|
|
usb_endpoint_dir_in(desc)) {
|
|
switch (desc->bEndpointAddress) {
|
|
case STK1160_EP_AUDIO:
|
|
has_audio = true;
|
|
break;
|
|
case STK1160_EP_VIDEO:
|
|
has_video = true;
|
|
max_pkt_size[i] = size;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Is this even possible? */
|
|
if (!(has_audio || has_video)) {
|
|
dev_err(&udev->dev, "no audio or video endpoints found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
switch (udev->speed) {
|
|
case USB_SPEED_LOW:
|
|
speed = "1.5";
|
|
break;
|
|
case USB_SPEED_FULL:
|
|
speed = "12";
|
|
break;
|
|
case USB_SPEED_HIGH:
|
|
speed = "480";
|
|
break;
|
|
default:
|
|
speed = "unknown";
|
|
}
|
|
|
|
dev_info(&udev->dev, "New device %s %s @ %s Mbps (%04x:%04x, interface %d, class %d)\n",
|
|
udev->manufacturer ? udev->manufacturer : "",
|
|
udev->product ? udev->product : "",
|
|
speed,
|
|
le16_to_cpu(udev->descriptor.idVendor),
|
|
le16_to_cpu(udev->descriptor.idProduct),
|
|
ifnum,
|
|
intf->altsetting->desc.bInterfaceNumber);
|
|
|
|
/* This should never happen, since we rejected audio interfaces */
|
|
if (has_audio)
|
|
dev_warn(&udev->dev, "audio interface %d found.\n\
|
|
This is not implemented by this driver,\
|
|
you should use snd-usb-audio instead\n", ifnum);
|
|
|
|
if (has_video)
|
|
dev_info(&udev->dev, "video interface %d found\n",
|
|
ifnum);
|
|
|
|
/*
|
|
* Make sure we have 480 Mbps of bandwidth, otherwise things like
|
|
* video stream wouldn't likely work, since 12 Mbps is generally
|
|
* not enough even for most streams.
|
|
*/
|
|
if (udev->speed != USB_SPEED_HIGH)
|
|
dev_warn(&udev->dev, "must be connected to a high-speed USB 2.0 port\n\
|
|
You may not be able to stream video smoothly\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int stk1160_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
int rc = 0;
|
|
|
|
unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
|
|
struct usb_device *udev;
|
|
struct stk1160 *dev;
|
|
|
|
udev = interface_to_usbdev(interface);
|
|
|
|
/*
|
|
* Since usb audio class is supported by snd-usb-audio,
|
|
* we reject audio interface.
|
|
*/
|
|
if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO)
|
|
return -ENODEV;
|
|
|
|
/* Alloc an array for all possible max_pkt_size */
|
|
alt_max_pkt_size = kmalloc_array(interface->num_altsetting,
|
|
sizeof(alt_max_pkt_size[0]),
|
|
GFP_KERNEL);
|
|
if (alt_max_pkt_size == NULL)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Scan usb possibilities and populate alt_max_pkt_size array.
|
|
* Also, check if device speed is fast enough.
|
|
*/
|
|
rc = stk1160_scan_usb(interface, udev, alt_max_pkt_size);
|
|
if (rc < 0) {
|
|
kfree(alt_max_pkt_size);
|
|
return rc;
|
|
}
|
|
|
|
dev = kzalloc(sizeof(struct stk1160), GFP_KERNEL);
|
|
if (dev == NULL) {
|
|
kfree(alt_max_pkt_size);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dev->alt_max_pkt_size = alt_max_pkt_size;
|
|
dev->udev = udev;
|
|
dev->num_alt = interface->num_altsetting;
|
|
dev->ctl_input = input;
|
|
|
|
/* We save struct device for debug purposes only */
|
|
dev->dev = &interface->dev;
|
|
|
|
usb_set_intfdata(interface, dev);
|
|
|
|
/* initialize videobuf2 stuff */
|
|
rc = stk1160_vb2_setup(dev);
|
|
if (rc < 0)
|
|
goto free_err;
|
|
|
|
/*
|
|
* There is no need to take any locks here in probe
|
|
* because we register the device node as the *last* thing.
|
|
*/
|
|
spin_lock_init(&dev->buf_lock);
|
|
mutex_init(&dev->v4l_lock);
|
|
mutex_init(&dev->vb_queue_lock);
|
|
|
|
rc = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0);
|
|
if (rc) {
|
|
stk1160_err("v4l2_ctrl_handler_init failed (%d)\n", rc);
|
|
goto free_err;
|
|
}
|
|
|
|
/*
|
|
* We obtain a v4l2_dev but defer
|
|
* registration of video device node as the last thing.
|
|
* There is no need to set the name if we give a device struct
|
|
*/
|
|
dev->v4l2_dev.release = stk1160_release;
|
|
dev->v4l2_dev.ctrl_handler = &dev->ctrl_handler;
|
|
rc = v4l2_device_register(dev->dev, &dev->v4l2_dev);
|
|
if (rc) {
|
|
stk1160_err("v4l2_device_register failed (%d)\n", rc);
|
|
goto free_ctrl;
|
|
}
|
|
|
|
rc = stk1160_i2c_register(dev);
|
|
if (rc < 0)
|
|
goto unreg_v4l2;
|
|
|
|
/*
|
|
* To the best of my knowledge stk1160 boards only have
|
|
* saa7113, but it doesn't hurt to support them all.
|
|
*/
|
|
dev->sd_saa7115 = v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
|
|
"saa7115_auto", 0, saa7113_addrs);
|
|
|
|
/* i2c reset saa711x */
|
|
v4l2_device_call_all(&dev->v4l2_dev, 0, core, reset, 0);
|
|
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
|
|
|
|
/* reset stk1160 to default values */
|
|
stk1160_reg_reset(dev);
|
|
|
|
/* select default input */
|
|
stk1160_select_input(dev);
|
|
|
|
stk1160_ac97_setup(dev);
|
|
|
|
rc = stk1160_video_register(dev);
|
|
if (rc < 0)
|
|
goto unreg_i2c;
|
|
|
|
return 0;
|
|
|
|
unreg_i2c:
|
|
stk1160_i2c_unregister(dev);
|
|
unreg_v4l2:
|
|
v4l2_device_unregister(&dev->v4l2_dev);
|
|
free_ctrl:
|
|
v4l2_ctrl_handler_free(&dev->ctrl_handler);
|
|
free_err:
|
|
kfree(alt_max_pkt_size);
|
|
kfree(dev);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void stk1160_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct stk1160 *dev;
|
|
|
|
dev = usb_get_intfdata(interface);
|
|
usb_set_intfdata(interface, NULL);
|
|
|
|
/*
|
|
* Wait until all current v4l2 operation are finished
|
|
* then deallocate resources
|
|
*/
|
|
mutex_lock(&dev->vb_queue_lock);
|
|
mutex_lock(&dev->v4l_lock);
|
|
|
|
/* Here is the only place where isoc get released */
|
|
stk1160_uninit_isoc(dev);
|
|
|
|
stk1160_clear_queue(dev);
|
|
|
|
video_unregister_device(&dev->vdev);
|
|
v4l2_device_disconnect(&dev->v4l2_dev);
|
|
|
|
/* This way current users can detect device is gone */
|
|
dev->udev = NULL;
|
|
|
|
mutex_unlock(&dev->v4l_lock);
|
|
mutex_unlock(&dev->vb_queue_lock);
|
|
|
|
/*
|
|
* This calls stk1160_release if it's the last reference.
|
|
* Otherwise, release is postponed until there are no users left.
|
|
*/
|
|
v4l2_device_put(&dev->v4l2_dev);
|
|
}
|
|
|
|
static struct usb_driver stk1160_usb_driver = {
|
|
.name = "stk1160",
|
|
.id_table = stk1160_id_table,
|
|
.probe = stk1160_probe,
|
|
.disconnect = stk1160_disconnect,
|
|
};
|
|
|
|
module_usb_driver(stk1160_usb_driver);
|