This is the core of the smi2021 module. It will register the module with the kernel, and register the usb probe function.
Signed-off-by: Jon Arne Jørgensen <jona...@jonarne.no> --- drivers/media/usb/smi2021/smi2021_main.c | 339 +++++++++++++++++++++++++++++++ 1 file changed, 339 insertions(+) create mode 100644 drivers/media/usb/smi2021/smi2021_main.c diff --git a/drivers/media/usb/smi2021/smi2021_main.c b/drivers/media/usb/smi2021/smi2021_main.c new file mode 100644 index 0000000..cc600e7 --- /dev/null +++ b/drivers/media/usb/smi2021/smi2021_main.c @@ -0,0 +1,339 @@ +/******************************************************************************* + * smi2021_main.c * + * * + * USB Driver for SMI2021 - EasyCAP * + * USB ID 1c88:003c * + * * + * ***************************************************************************** + * + * Copyright 2011-2013 Jon Arne Jørgensen + * <jonjon.arnearne--a.t--gmail.com> + * + * Copyright 2011, 2012 Tony Brown, Michal Demin, Jeffry Johnston + * + * This file is part of SMI2021 + * http://code.google.com/p/easycap-somagic-linux/ + * + * 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, see <http://www.gnu.org/licenses/>. + * + * This driver is heavily influensed by the STK1160 driver. + * Copyright (C) 2012 Ezequiel Garcia + * <elezegarcia--a.t--gmail.com> + * + */ + +#include "smi2021.h" + +#define VENDOR_ID 0x1c88 + +static unsigned int imput; +module_param(imput, int, 0644); +MODULE_PARM_DESC(input, "Set default input"); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jon Arne Jørgensen <jonjon.arnearne--a.t--gmail.com>"); +MODULE_DESCRIPTION("SMI2021 - EasyCap"); +MODULE_VERSION(SMI2021_DRIVER_VERSION); + + +struct usb_device_id smi2021_usb_device_id_table[] = { + { USB_DEVICE(VENDOR_ID, 0x003c) }, + { USB_DEVICE(VENDOR_ID, 0x003d) }, + { USB_DEVICE(VENDOR_ID, 0x003e) }, + { USB_DEVICE(VENDOR_ID, 0x003f) }, + { } +}; + +MODULE_DEVICE_TABLE(usb, smi2021_usb_device_id_table); + +static unsigned short saa7113_addrs[] = { + 0x4a, + I2C_CLIENT_END +}; + +/******************************************************************************/ +/* */ +/* Write to saa7113 */ +/* */ +/******************************************************************************/ + +inline int transfer_usb_ctrl(struct smi2021_dev *dev, u8 *data, int len) +{ + return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0x00), + 0x01, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x0b, 0x00, + data, len, 1000); +} + +int smi2021_write_reg(struct smi2021_dev *dev, u8 addr, u16 reg, u8 val) +{ + int rc; + u8 snd_data[8]; + + memset(snd_data, 0x00, 8); + + snd_data[SMI2021_CTRL_HEAD] = 0x0b; + snd_data[SMI2021_CTRL_ADDR] = addr; + snd_data[SMI2021_CTRL_DATA_SIZE] = 0x01; + + if (addr) { + /* This is I2C data for the saa7113 chip */ + snd_data[SMI2021_CTRL_BM_DATA_TYPE] = 0xc0; + snd_data[SMI2021_CTRL_BM_DATA_OFFSET] = 0x01; + + snd_data[SMI2021_CTRL_I2C_REG] = reg; + snd_data[SMI2021_CTRL_I2C_VAL] = val; + } else { + /* This is register settings for the smi2021 chip */ + snd_data[SMI2021_CTRL_BM_DATA_OFFSET] = 0x82; + + snd_data[SMI2021_CTRL_REG_HI] = __cpu_to_be16(reg) >> 8; + snd_data[SMI2021_CTRL_REG_LO] = __cpu_to_be16(reg); + + } + + rc = transfer_usb_ctrl(dev, snd_data, 8); + if (rc < 0) { + smi2021_warn("write failed on register 0x%x, errno: %d\n", + reg, rc); + return rc; + } + + return 0; +} + +int smi2021_read_reg(struct smi2021_dev *dev, u8 addr, u16 reg, u8 *val) +{ + int rc; + u8 rcv_data[13]; + u8 snd_data[8]; + memset(rcv_data, 0x00, 13); + memset(snd_data, 0x00, 8); + + snd_data[SMI2021_CTRL_HEAD] = 0x0b; + snd_data[SMI2021_CTRL_ADDR] = addr; + snd_data[SMI2021_CTRL_BM_DATA_TYPE] = 0x84; + snd_data[SMI2021_CTRL_DATA_SIZE] = 0x01; + snd_data[SMI2021_CTRL_I2C_REG] = reg; + + *val = 0; + + rc = transfer_usb_ctrl(dev, snd_data, 8); + if (rc < 0) { + smi2021_warn( + "1st pass failing to read reg 0x%x, usb-errno: %d\n", + reg, rc); + return rc; + } + + snd_data[SMI2021_CTRL_BM_DATA_TYPE] = 0xa0; + rc = transfer_usb_ctrl(dev, snd_data, 8); + if (rc < 0) { + smi2021_warn( + "2nd pass failing to read reg 0x%x, usb-errno: %d\n", + reg, rc); + return rc; + } + + rc = usb_control_msg(dev->udev, + usb_rcvctrlpipe(dev->udev, 0x80), 0x01, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0x0b, 0x00, rcv_data, 13, 1000); + if (rc < 0) { + smi2021_warn("Failed to read reg 0x%x, usb-errno: %d\n", + reg, rc); + return rc; + } + + *val = rcv_data[SMI2021_CTRL_I2C_RCV_VAL]; + return 0; +} + +static void smi2021_reset_device(struct smi2021_dev *dev) +{ + smi2021_write_reg(dev, 0, 0x3a, 0x80); + smi2021_write_reg(dev, 0, 0x3b, 0x80); + smi2021_write_reg(dev, 0, 0x3b, 0x00); +} + +static void release_v4l2_dev(struct v4l2_device *v4l2_dev) +{ + struct smi2021_dev *dev = container_of(v4l2_dev, struct smi2021_dev, + v4l2_dev); + smi2021_dbg("Releasing all resources\n"); + + smi2021_i2c_unregister(dev); + + v4l2_ctrl_handler_free(&dev->ctrl_handler); + v4l2_device_unregister(&dev->v4l2_dev); + kfree(dev); +} + +#define hb_mult(w_max_packet_size) (1 + (((w_max_packet_size) >> 11) & 0x03)) + +static int smi2021_scan_usb(struct usb_interface *intf, struct usb_device *udev) +{ + int i, e, ifnum, sizedescr, size; + const struct usb_endpoint_descriptor *desc; + ifnum = intf->altsetting[0].desc.bInterfaceNumber; + + for (i = 0; i < intf->num_altsetting; i++) { + for (e = 0; e < intf->altsetting[i].desc.bNumEndpoints; e++) { + desc = &intf->altsetting[i].endpoint[e].desc; + sizedescr = le16_to_cpu(desc->wMaxPacketSize); + size = sizedescr & 0x7ff; + + if (udev->speed == USB_SPEED_HIGH) + size = size * hb_mult(sizedescr); + } + } + return 0; +} + +/******************************************************************************/ +/* */ +/* DEVICE - PROBE & DISCONNECT */ +/* */ +/******************************************************************************/ +static int smi2021_usb_probe(struct usb_interface *intf, + const struct usb_device_id *devid) +{ + int rc = 0; + struct usb_device *udev = interface_to_usbdev(intf); + struct smi2021_dev *dev; + + if (udev == (struct usb_device *)NULL) { + smi2021_err("device is NULL\n"); + return -EFAULT; + } + + smi2021_scan_usb(intf, udev); + + dev = kzalloc(sizeof(struct smi2021_dev), GFP_KERNEL); + if (dev == NULL) + return -ENOMEM; + + dev->udev = udev; + dev->dev = &intf->dev; + usb_set_intfdata(intf, dev); + + /* Initialize videobuf2 stuff */ + rc = smi2021_vb2_setup(dev); + if (rc < 0) + goto free_err; + + spin_lock_init(&dev->buf_lock); + mutex_init(&dev->v4l2_lock); + mutex_init(&dev->vb_queue_lock); + + rc = v4l2_ctrl_handler_init(&dev->ctrl_handler, 0); + if (rc) { + smi2021_err("v4l2_ctrl_handler_init failed with: %d\n", rc); + goto free_err; + } + + dev->v4l2_dev.release = release_v4l2_dev; + dev->v4l2_dev.ctrl_handler = &dev->ctrl_handler; + rc = v4l2_device_register(dev->dev, &dev->v4l2_dev); + if (rc) { + smi2021_err("v4l2_device_register failed with %d\n", rc); + goto free_ctrl; + } + + smi2021_reset_device(dev); + + rc = smi2021_i2c_register(dev); + if (rc < 0) + goto unreg_v4l2; + + dev->sd_saa7113 = v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap, + "saa7113", 0, saa7113_addrs); + + smi2021_dbg("Driver version %s successfully loaded\n", + SMI2021_DRIVER_VERSION); + + v4l2_device_call_all(&dev->v4l2_dev, 0, core, reset, 0); + v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0); + + rc = smi2021_snd_register(dev); + if (rc < 0) + goto unreg_i2c; + + rc = smi2021_video_register(dev); + if (rc < 0) + goto unreg_snd; + + return 0; + +unreg_snd: + smi2021_snd_unregister(dev); +unreg_i2c: + smi2021_i2c_unregister(dev); +unreg_v4l2: + v4l2_device_unregister(&dev->v4l2_dev); +free_ctrl: + v4l2_ctrl_handler_free(&dev->ctrl_handler); +free_err: + kfree(dev); + + return rc; +} + +static void smi2021_usb_disconnect(struct usb_interface *intf) +{ + struct smi2021_dev *dev = usb_get_intfdata(intf); + + smi2021_dbg("Going for release!\n"); + + usb_set_intfdata(intf, NULL); + + mutex_lock(&dev->vb_queue_lock); + mutex_lock(&dev->v4l2_lock); + + smi2021_uninit_isoc(dev); + smi2021_clear_queue(dev); + + video_unregister_device(&dev->vdev); + v4l2_device_disconnect(&dev->v4l2_dev); + + /* This way current users can detect device is gone */ + dev->udev = NULL; + + mutex_unlock(&dev->v4l2_lock); + mutex_unlock(&dev->vb_queue_lock); + + smi2021_snd_unregister(dev); + + /* + * This calls release_v4l2_dev if it's the last reference. + * Otherwise, the release is postponed until there are no users left. + */ + v4l2_device_put(&dev->v4l2_dev); +} + +/******************************************************************************/ +/* */ +/* MODULE - INIT & EXIT */ +/* */ +/******************************************************************************/ + +struct usb_driver smi2021_usb_driver = { + .name = "smi2021", + .id_table = smi2021_usb_device_id_table, + .probe = smi2021_usb_probe, + .disconnect = smi2021_usb_disconnect +}; + +module_usb_driver(smi2021_usb_driver); + -- 1.8.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
