/* * Driver for the Auvitek USB bridge * * Copyright (c) 2008 Steven Toth * * 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 "au0828.h" #include #include #include #include #include /* Due to enum tuner_pad_index */ #include /* * 1 = General debug messages * 2 = USB handling * 4 = I2C related * 8 = Bridge related * 16 = IR related */ int au0828_debug; module_param_named(debug, au0828_debug, int, 0644); MODULE_PARM_DESC(debug, "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR"); static unsigned int disable_usb_speed_check; module_param(disable_usb_speed_check, int, 0444); MODULE_PARM_DESC(disable_usb_speed_check, "override min bandwidth requirement of 480M bps"); #define _AU0828_BULKPIPE 0x03 #define _BULKPIPESIZE 0xffff static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value, u16 index); static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value, u16 index, unsigned char *cp, u16 size); /* USB Direction */ #define CMD_REQUEST_IN 0x00 #define CMD_REQUEST_OUT 0x01 u32 au0828_readreg(struct au0828_dev *dev, u16 reg) { u8 result = 0; recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1); dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result); return result; } u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val) { dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val); return send_control_msg(dev, CMD_REQUEST_OUT, val, reg); } static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value, u16 index) { int status = -ENODEV; if (dev->usbdev) { /* cp must be memory that has been allocated by kmalloc */ status = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), request, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, NULL, 0, 1000); status = min(status, 0); if (status < 0) { pr_err("%s() Failed sending control message, error %d.\n", __func__, status); } } return status; } static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value, u16 index, unsigned char *cp, u16 size) { int status = -ENODEV; mutex_lock(&dev->mutex); if (dev->usbdev) { status = usb_control_msg(dev->usbdev, usb_rcvctrlpipe(dev->usbdev, 0), request, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, dev->ctrlmsg, size, 1000); status = min(status, 0); if (status < 0) { pr_err("%s() Failed receiving control message, error %d.\n", __func__, status); } /* the host controller requires heap allocated memory, which is why we didn't just pass "cp" into usb_control_msg */ memcpy(cp, dev->ctrlmsg, size); } mutex_unlock(&dev->mutex); return status; } static void au0828_unregister_media_device(struct au0828_dev *dev) { #ifdef CONFIG_MEDIA_CONTROLLER if (dev->media_dev) { media_device_unregister(dev->media_dev); media_device_cleanup(dev->media_dev); kfree(dev->media_dev); dev->media_dev = NULL; } #endif } void au0828_usb_release(struct au0828_dev *dev) { au0828_unregister_media_device(dev); /* I2C */ au0828_i2c_unregister(dev); kfree(dev); } static void au0828_usb_disconnect(struct usb_interface *interface) { struct au0828_dev *dev = usb_get_intfdata(interface); dprintk(1, "%s()\n", __func__); /* there is a small window after disconnect, before dev->usbdev is NULL, for poll (e.g: IR) try to access the device and fill the dmesg with error messages. Set the status so poll routines can check and avoid access after disconnect. */ dev->dev_state = DEV_DISCONNECTED; au0828_rc_unregister(dev); /* Digital TV */ au0828_dvb_unregister(dev); usb_set_intfdata(interface, NULL); mutex_lock(&dev->mutex); dev->usbdev = NULL; mutex_unlock(&dev->mutex); if (au0828_analog_unregister(dev)) { /* * No need to call au0828_usb_release() if V4L2 is enabled, * as this is already called via au0828_usb_v4l2_release() */ return; } au0828_usb_release(dev); } static int au0828_media_device_init(struct au0828_dev *dev, struct usb_device *udev) { #ifdef CONFIG_MEDIA_CONTROLLER struct media_device *mdev; mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); if (!mdev) return -ENOMEM; mdev->dev = &udev->dev; if (!dev->board.name) strlcpy(mdev->model, "unknown au0828", sizeof(mdev->model)); else strlcpy(mdev->model, dev->board.name, sizeof(mdev->model)); if (udev->serial) strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); strcpy(mdev->bus_info, udev->devpath); mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); mdev->driver_version = LINUX_VERSION_CODE; media_device_init(mdev); dev->media_dev = mdev; #endif return 0; } static int au0828_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { int ifnum; int retval = 0; struct au0828_dev *dev; struct usb_device *usbdev = interface_to_usbdev(interface); ifnum = interface->altsetting->desc.bInterfaceNumber; if (ifnum != 0) return -ENODEV; dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__, le16_to_cpu(usbdev->descriptor.idVendor), le16_to_cpu(usbdev->descriptor.idProduct), 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 Digital TV streams. */ if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) { pr_err("au0828: Device initialization failed.\n"); pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n"); return -ENODEV; } dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) { pr_err("%s() Unable to allocate memory\n", __func__); return -ENOMEM; } mutex_init(&dev->lock); mutex_lock(&dev->lock); mutex_init(&dev->mutex); mutex_init(&dev->dvb.lock); dev->usbdev = usbdev; dev->boardnr = id->driver_info; dev->board = au0828_boards[dev->boardnr]; /* Initialize the media controller */ retval = au0828_media_device_init(dev, usbdev); if (retval) { pr_err("%s() au0828_media_device_init failed\n", __func__); mutex_unlock(&dev->lock); kfree(dev); return retval; } retval = au0828_v4l2_device_register(interface, dev); if (retval) { au0828_usb_v4l2_media_release(dev); mutex_unlock(&dev->lock); kfree(dev); return retval; } /* Power Up the bridge */ au0828_write(dev, REG_600, 1 << 4); /* Bring up the GPIO's and supporting devices */ au0828_gpio_setup(dev); /* I2C */ au0828_i2c_register(dev); /* Setup */ au0828_card_setup(dev); /* Analog TV */ retval = au0828_analog_register(dev, interface); if (retval) { pr_err("%s() au0282_dev_register failed to register on V4L2\n", __func__); goto done; } /* Digital TV */ retval = au0828_dvb_register(dev); if (retval) pr_err("%s() au0282_dev_register failed\n", __func__); /* Remote controller */ au0828_rc_register(dev); /* * Store the pointer to the au0828_dev so it can be accessed in * au0828_usb_disconnect */ usb_set_intfdata(interface, dev); pr_info("Registered device AU0828 [%s]\n", dev->board.name == NULL ? "Unset" : dev->board.name); mutex_unlock(&dev->lock); #ifdef CONFIG_MEDIA_CONTROLLER retval = media_device_register(dev->media_dev); #endif done: if (retval < 0) au0828_usb_disconnect(interface); return retval; } static int au0828_suspend(struct usb_interface *interface, pm_message_t message) { struct au0828_dev *dev = usb_get_intfdata(interface); if (!dev) return 0; pr_info("Suspend\n"); au0828_rc_suspend(dev); au0828_v4l2_suspend(dev); au0828_dvb_suspend(dev); /* FIXME: should suspend also ATV/DTV */ return 0; } static int au0828_resume(struct usb_interface *interface) { struct au0828_dev *dev = usb_get_intfdata(interface); if (!dev) return 0; pr_info("Resume\n"); /* Power Up the bridge */ au0828_write(dev, REG_600, 1 << 4); /* Bring up the GPIO's and supporting devices */ au0828_gpio_setup(dev); au0828_rc_resume(dev); au0828_v4l2_resume(dev); au0828_dvb_resume(dev); /* FIXME: should resume also ATV/DTV */ return 0; } static struct usb_driver au0828_usb_driver = { .name = KBUILD_MODNAME, .probe = au0828_usb_probe, .disconnect = au0828_usb_disconnect, .id_table = au0828_usb_id_table, .suspend = au0828_suspend, .resume = au0828_resume, .reset_resume = au0828_resume, }; static int __init au0828_init(void) { int ret; if (au0828_debug & 1) pr_info("%s() Debugging is enabled\n", __func__); if (au0828_debug & 2) pr_info("%s() USB Debugging is enabled\n", __func__); if (au0828_debug & 4) pr_info("%s() I2C Debugging is enabled\n", __func__); if (au0828_debug & 8) pr_info("%s() Bridge Debugging is enabled\n", __func__); if (au0828_debug & 16) pr_info("%s() IR Debugging is enabled\n", __func__); pr_info("au0828 driver loaded\n"); ret = usb_register(&au0828_usb_driver); if (ret) pr_err("usb_register failed, error = %d\n", ret); return ret; } static void __exit au0828_exit(void) { usb_deregister(&au0828_usb_driver); } module_init(au0828_init); module_exit(au0828_exit); MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products"); MODULE_AUTHOR("Steven Toth "); MODULE_LICENSE("GPL"); MODULE_VERSION("0.0.3");