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Date: Thu, 14 Mar 2013 15:06:58 +0100
From: Jon Arne Jørgensen <jonarne@...arne.no>
To: linux-media@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hverkuil@...all.nl,
elezegarcia@...il.com,
Jon Arne Jørgensen <jonarne@...arne.no>
Subject: [RFC V1 2/8] smi2021: Add smi2021_main.c
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 <jonarne@...arne.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
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