diff options
Diffstat (limited to 'drivers/media/video/au0828/au0828-core.c')
| -rw-r--r-- | drivers/media/video/au0828/au0828-core.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/drivers/media/video/au0828/au0828-core.c b/drivers/media/video/au0828/au0828-core.c new file mode 100644 index 000000000000..8d0b8a8b06bd --- /dev/null +++ b/drivers/media/video/au0828/au0828-core.c @@ -0,0 +1,252 @@ +/* + * Driver for the Auvitek USB bridge + * + * Copyright (c) 2008 Steven Toth <stoth@hauppauge.com> + * + * 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 <linux/module.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <linux/mutex.h> + +#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); + _dbg(3,"%s(0x%x) = 0x%x\n", __FUNCTION__, reg, dev->ctrlmsg[0]); + return dev->ctrlmsg[0]; +} + +u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val) +{ + _dbg(3,"%s(0x%x, 0x%x)\n", __FUNCTION__, 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) + _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; +} +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, +}; + +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 <stoth@hauppauge.com>"); +MODULE_LICENSE("GPL"); |