/* * 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 "compat.h" #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,15) #include #endif #include "au0828.h" static unsigned int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable debug messages"); #define _err(fmt, arg...)\ do {\ printk(KERN_ERR DRIVER_NAME "/0: " fmt, ## arg);\ } while (0) #define _info(fmt, arg...)\ do {\ printk(KERN_INFO DRIVER_NAME "/0: " fmt, ## arg);\ } while (0) #define _dbg(level, fmt, arg...)\ do {\ if (debug >= level) \ printk(KERN_DEBUG DRIVER_NAME "/0: " fmt, ## arg);\ } while (0) #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); #if 1 _dbg(3,"%s(0x%x) = 0x%x\n", __FUNCTION__, reg, dev->ctrlmsg[0]); #endif return dev->ctrlmsg[0]; } u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val) { #if 1 _dbg(3,"%s(0x%x, 0x%x)\n", __FUNCTION__, reg, val); #endif 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) _dbg(1,"%s() %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x " "%02x %02x %02x %02x %02x %02x\n", __FUNCTION__, 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) { _err("%s() Failed sending control message, error %d.\n", __FUNCTION__, 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) { _err("%s() Failed receiving ctrl msg, error %d.\n", __FUNCTION__, status); } else if (debug > 4) cmd_msg_dump(dev); } mutex_unlock(&dev->mutex); return status; } #if 0 static void dump_urb(struct urb *urb) { _dbg(1,"urb :%p\n", urb); _dbg(1,"dev :%p\n", urb->dev); _dbg(1,"pipe :%08x\n", urb->pipe); _dbg(1,"status :%d\n", urb->status); _dbg(1,"transfer_flags :%08x\n", urb->transfer_flags); _dbg(1,"transfer_buffer :%p\n", urb->transfer_buffer); _dbg(1,"transfer_buffer_length:%d\n", urb->transfer_buffer_length); _dbg(1,"actual_length :%d\n", urb->actual_length); _dbg(1,"setup_packet :%p\n", urb->setup_packet); _dbg(1,"start_frame :%d\n", urb->start_frame); _dbg(1,"number_of_packets :%d\n", urb->number_of_packets); _dbg(1,"interval :%d\n", urb->interval); _dbg(1,"error_count :%d\n", urb->error_count); _dbg(1,"context :%p\n", urb->context); _dbg(1,"complete :%p\n", urb->complete); } #endif static void au0828_usb_disconnect(struct usb_interface *interface) { struct au0828_dev *dev = usb_get_intfdata(interface); _dbg(1,"%s()\n", __FUNCTION__); /* Digital TV */ au0828_dvb_unregister(dev); /* I2C */ au0828_i2c_unregister(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; struct au0828_dev *dev; struct usb_device *usbdev = interface_to_usbdev(interface); ifnum = interface->altsetting->desc.bInterfaceNumber; if (ifnum != 0) return -ENODEV; _dbg(1,"%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __FUNCTION__, le16_to_cpu(usbdev->descriptor.idVendor), le16_to_cpu(usbdev->descriptor.idProduct), ifnum); dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) { _err("Unable to allocate memory\n"); return -ENOMEM; } mutex_init(&dev->mutex); mutex_init(&dev->dvb.lock); dev->usbdev = usbdev; dev->board = id->driver_info; usb_set_intfdata(interface, dev); /* 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); /* Digital TV */ au0828_dvb_register(dev); _info("Registered device AU0828 [%s]\n", au0828_boards[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, #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,15) .owner = THIS_MODULE, #endif }; static int __init au0828_init(void) { int ret; _info("au0828 driver loaded\n"); ret = usb_register(&au0828_usb_driver); if (ret) _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");