/* * 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 #include #include #include #include #include "au0828.h" /* * 1 = General debug messages * 2 = USB handling * 4 = I2C related * 8 = Bridge related */ int au0828_debug; module_param_named(debug, au0828_debug, int, 0644); MODULE_PARM_DESC(debug, "enable debug messages"); 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, unsigned char *cp, u16 size); 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) { recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1); dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, dev->ctrlmsg[0]); return dev->ctrlmsg[0]; } 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, dev->ctrlmsg, 0); } static void cmd_msg_dump(struct au0828_dev *dev) { int i; for (i = 0; i < sizeof(dev->ctrlmsg); i += 16) dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x " "%02x %02x %02x %02x %02x %02x %02x %02x\n", __func__, dev->ctrlmsg[i+0], dev->ctrlmsg[i+1], dev->ctrlmsg[i+2], dev->ctrlmsg[i+3], dev->ctrlmsg[i+4], dev->ctrlmsg[i+5], dev->ctrlmsg[i+6], dev->ctrlmsg[i+7], dev->ctrlmsg[i+8], dev->ctrlmsg[i+9], dev->ctrlmsg[i+10], dev->ctrlmsg[i+11], dev->ctrlmsg[i+12], dev->ctrlmsg[i+13], dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]); } static int send_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) { /* 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, cp, size, 1000); status = min(status, 0); if (status < 0) { printk(KERN_ERR "%s() Failed sending control message, error %d.\n", __func__, status); } } mutex_unlock(&dev->mutex); 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) { memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg)); /* cp must be memory that has been allocated by kmalloc */ status = usb_control_msg(dev->usbdev, usb_rcvctrlpipe(dev->usbdev, 0), request, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, cp, size, 1000); status = min(status, 0); if (status < 0) { printk(KERN_ERR "%s() Failed receiving control message, error %d.\n", __func__, status); } else cmd_msg_dump(dev); } mutex_unlock(&dev->mutex); return status; } static void au0828_usb_disconnect(struct usb_interface *interface) { struct au0828_dev *dev = usb_get_intfdata(interface); dprintk(1, "%s()\n", __func__); /* Digital TV */ au0828_dvb_unregister(dev); if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) au0828_analog_unregister(dev); /* I2C */ au0828_i2c_unregister(dev); v4l2_device_unregister(&dev->v4l2_dev); usb_set_intfdata(interface, NULL); mutex_lock(&dev->mutex); dev->usbdev = NULL; mutex_unlock(&dev->mutex); kfree(dev); } static int au0828_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { int ifnum, retval; 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) { printk(KERN_ERR "au0828: Device initialization failed.\n"); printk(KERN_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) { printk(KERN_ERR "%s() Unable to allocate memory\n", __func__); return -ENOMEM; } mutex_init(&dev->mutex); mutex_init(&dev->dvb.lock); dev->usbdev = usbdev; dev->boardnr = id->driver_info; /* Create the v4l2_device */ retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev); if (retval) { printk(KERN_ERR "%s() v4l2_device_register failed\n", __func__); kfree(dev); return -EIO; } /* 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 */ if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) au0828_analog_register(dev, interface); /* Digital TV */ au0828_dvb_register(dev); /* Store the pointer to the au0828_dev so it can be accessed in au0828_usb_disconnect */ usb_set_intfdata(interface, dev); printk(KERN_INFO "Registered device AU0828 [%s]\n", dev->board.name == NULL ? "Unset" : dev->board.name); return 0; } static struct usb_driver au0828_usb_driver = { .name = DRIVER_NAME, .probe = au0828_usb_probe, .disconnect = au0828_usb_disconnect, .id_table = au0828_usb_id_table, }; static int __init au0828_init(void) { int ret; if (au0828_debug & 1) printk(KERN_INFO "%s() Debugging is enabled\n", __func__); if (au0828_debug & 2) printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__); if (au0828_debug & 4) printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__); if (au0828_debug & 8) printk(KERN_INFO "%s() Bridge Debugging is enabled\n", __func__); printk(KERN_INFO "au0828 driver loaded\n"); ret = usb_register(&au0828_usb_driver); if (ret) printk(KERN_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("0.0.2");