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