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Diffstat (limited to 'deploy/__init__.py')

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/* * 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); 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_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 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(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_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);


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