diff options
Diffstat (limited to 'drivers/media/video/stk1160/stk1160-core.c')
| -rw-r--r-- | drivers/media/video/stk1160/stk1160-core.c | 432 |
1 files changed, 0 insertions, 432 deletions
diff --git a/drivers/media/video/stk1160/stk1160-core.c b/drivers/media/video/stk1160/stk1160-core.c deleted file mode 100644 index 74236fd3b7ec..000000000000 --- a/drivers/media/video/stk1160/stk1160-core.c +++ /dev/null @@ -1,432 +0,0 @@ -/* - * 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. (Try to) detect if we must register ac97 mixer - * 2. 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/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 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); - - *value = 0; - ret = usb_control_msg(dev->udev, pipe, 0x00, - USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - 0x00, reg, value, sizeof(u8), HZ); - if (ret < 0) { - stk1160_err("read failed on reg 0x%x (%d)\n", - reg, ret); - return ret; - } - - 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) -{ - static const u8 gctrl[] = { - 0x98, 0x90, 0x88, 0x80 - }; - - if (dev->ctl_input < ARRAY_SIZE(gctrl)) - 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_info("releasing all resources\n"); - - stk1160_i2c_unregister(dev); - - v4l2_ctrl_handler_free(&dev->ctrl_handler); - v4l2_device_unregister(&dev->v4l2_dev); - 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 ifnum; - int rc = 0; - - unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */ - struct usb_device *udev; - struct stk1160 *dev; - - ifnum = interface->altsetting[0].desc.bInterfaceNumber; - 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(sizeof(alt_max_pkt_size[0]) * - interface->num_altsetting, GFP_KERNEL); - if (alt_max_pkt_size == NULL) - return -ENOMEM; - - /* - * Scan usb posibilities 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); - - stk1160_info("driver ver %s successfully loaded\n", - STK1160_VERSION); - - /* i2c reset saa711x */ - v4l2_device_call_all(&dev->v4l2_dev, 0, core, reset, 0); - v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing, - 0, 0, 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_register(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); - - /* ac97 unregister needs to be done before usb_device is cleared */ - stk1160_ac97_unregister(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. - * therwise, release is posponed 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); |