diff options
Diffstat (limited to 'drivers/media/usb/au0828/au0828-core.c')
| -rw-r--r-- | drivers/media/usb/au0828/au0828-core.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c new file mode 100644 index 0000000..eb32b37 --- /dev/null +++ b/drivers/media/usb/au0828/au0828-core.c @@ -0,0 +1,318 @@ +/* + * Driver for the Auvitek USB bridge + * + * Copyright (c) 2008 Steven Toth <stoth@linuxtv.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. + * + * 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/slab.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <linux/mutex.h> + +#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); +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) { + printk(KERN_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) { + printk(KERN_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_usb_release(struct au0828_dev *dev) +{ + /* I2C */ + au0828_i2c_unregister(dev); + + kfree(dev); +} + +#ifdef CPTCFG_VIDEO_AU0828_V4L2 +static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev) +{ + struct au0828_dev *dev = + container_of(v4l2_dev, struct au0828_dev, v4l2_dev); + + v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl); + v4l2_device_unregister(&dev->v4l2_dev); + au0828_usb_release(dev); +} +#endif + +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); + + usb_set_intfdata(interface, NULL); + mutex_lock(&dev->mutex); + dev->usbdev = NULL; + mutex_unlock(&dev->mutex); +#ifdef CPTCFG_VIDEO_AU0828_V4L2 + if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) { + au0828_analog_unregister(dev); + v4l2_device_disconnect(&dev->v4l2_dev); + v4l2_device_put(&dev->v4l2_dev); + return; + } +#endif + au0828_usb_release(dev); +} + +static int au0828_usb_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + int ifnum; +#ifdef CPTCFG_VIDEO_AU0828_V4L2 + int retval; +#endif + 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->lock); + mutex_lock(&dev->lock); + mutex_init(&dev->mutex); + mutex_init(&dev->dvb.lock); + dev->usbdev = usbdev; + dev->boardnr = id->driver_info; + +#ifdef CPTCFG_VIDEO_AU0828_V4L2 + dev->v4l2_dev.release = au0828_usb_v4l2_release; + + /* Create the v4l2_device */ + retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev); + if (retval) { + pr_err("%s() v4l2_device_register failed\n", + __func__); + mutex_unlock(&dev->lock); + kfree(dev); + return retval; + } + /* This control handler will inherit the controls from au8522 */ + retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4); + if (retval) { + pr_err("%s() v4l2_ctrl_handler_init failed\n", + __func__); + mutex_unlock(&dev->lock); + kfree(dev); + return retval; + } + dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl; +#endif + + /* 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); + +#ifdef CPTCFG_VIDEO_AU0828_V4L2 + /* Analog TV */ + if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) + au0828_analog_register(dev, interface); +#endif + + /* 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); + + mutex_unlock(&dev->lock); + + 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 <stoth@linuxtv.org>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.0.2"); |