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path: root/drivers/media/usb/as102/as102_usb_drv.c
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Diffstat (limited to 'drivers/media/usb/as102/as102_usb_drv.c')
-rw-r--r--drivers/media/usb/as102/as102_usb_drv.c475
1 files changed, 475 insertions, 0 deletions
diff --git a/drivers/media/usb/as102/as102_usb_drv.c b/drivers/media/usb/as102/as102_usb_drv.c
new file mode 100644
index 0000000..3f66906
--- /dev/null
+++ b/drivers/media/usb/as102/as102_usb_drv.c
@@ -0,0 +1,475 @@
+/*
+ * Abilis Systems Single DVB-T Receiver
+ * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
+ * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.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, 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.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/usb.h>
+
+#include "as102_drv.h"
+#include "as102_usb_drv.h"
+#include "as102_fw.h"
+
+static void as102_usb_disconnect(struct usb_interface *interface);
+static int as102_usb_probe(struct usb_interface *interface,
+ const struct usb_device_id *id);
+
+static int as102_usb_start_stream(struct as102_dev_t *dev);
+static void as102_usb_stop_stream(struct as102_dev_t *dev);
+
+static int as102_open(struct inode *inode, struct file *file);
+static int as102_release(struct inode *inode, struct file *file);
+
+static struct usb_device_id as102_usb_id_table[] = {
+ { USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },
+ { USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },
+ { USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },
+ { USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },
+ { USB_DEVICE(SKY_IT_DIGITAL_KEY_USB_VID, SKY_IT_DIGITAL_KEY_USB_PID) },
+ { } /* Terminating entry */
+};
+
+/* Note that this table must always have the same number of entries as the
+ as102_usb_id_table struct */
+static const char * const as102_device_names[] = {
+ AS102_REFERENCE_DESIGN,
+ AS102_PCTV_74E,
+ AS102_ELGATO_EYETV_DTT_NAME,
+ AS102_NBOX_DVBT_DONGLE_NAME,
+ AS102_SKY_IT_DIGITAL_KEY_NAME,
+ NULL /* Terminating entry */
+};
+
+/* eLNA configuration: devices built on the reference design work best
+ with 0xA0, while custom designs seem to require 0xC0 */
+static uint8_t const as102_elna_cfg[] = {
+ 0xA0,
+ 0xC0,
+ 0xC0,
+ 0xA0,
+ 0xA0,
+ 0x00 /* Terminating entry */
+};
+
+struct usb_driver as102_usb_driver = {
+ .name = DRIVER_FULL_NAME,
+ .probe = as102_usb_probe,
+ .disconnect = as102_usb_disconnect,
+ .id_table = as102_usb_id_table
+};
+
+static const struct file_operations as102_dev_fops = {
+ .owner = THIS_MODULE,
+ .open = as102_open,
+ .release = as102_release,
+};
+
+static struct usb_class_driver as102_usb_class_driver = {
+ .name = "aton2-%d",
+ .fops = &as102_dev_fops,
+ .minor_base = AS102_DEVICE_MAJOR,
+};
+
+static int as102_usb_xfer_cmd(struct as10x_bus_adapter_t *bus_adap,
+ unsigned char *send_buf, int send_buf_len,
+ unsigned char *recv_buf, int recv_buf_len)
+{
+ int ret = 0;
+
+ if (send_buf != NULL) {
+ ret = usb_control_msg(bus_adap->usb_dev,
+ usb_sndctrlpipe(bus_adap->usb_dev, 0),
+ AS102_USB_DEVICE_TX_CTRL_CMD,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE,
+ bus_adap->cmd_xid, /* value */
+ 0, /* index */
+ send_buf, send_buf_len,
+ USB_CTRL_SET_TIMEOUT /* 200 */);
+ if (ret < 0) {
+ dev_dbg(&bus_adap->usb_dev->dev,
+ "usb_control_msg(send) failed, err %i\n", ret);
+ return ret;
+ }
+
+ if (ret != send_buf_len) {
+ dev_dbg(&bus_adap->usb_dev->dev,
+ "only wrote %d of %d bytes\n", ret, send_buf_len);
+ return -1;
+ }
+ }
+
+ if (recv_buf != NULL) {
+#ifdef TRACE
+ dev_dbg(bus_adap->usb_dev->dev,
+ "want to read: %d bytes\n", recv_buf_len);
+#endif
+ ret = usb_control_msg(bus_adap->usb_dev,
+ usb_rcvctrlpipe(bus_adap->usb_dev, 0),
+ AS102_USB_DEVICE_RX_CTRL_CMD,
+ USB_DIR_IN | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE,
+ bus_adap->cmd_xid, /* value */
+ 0, /* index */
+ recv_buf, recv_buf_len,
+ USB_CTRL_GET_TIMEOUT /* 200 */);
+ if (ret < 0) {
+ dev_dbg(&bus_adap->usb_dev->dev,
+ "usb_control_msg(recv) failed, err %i\n", ret);
+ return ret;
+ }
+#ifdef TRACE
+ dev_dbg(bus_adap->usb_dev->dev,
+ "read %d bytes\n", recv_buf_len);
+#endif
+ }
+
+ return ret;
+}
+
+static int as102_send_ep1(struct as10x_bus_adapter_t *bus_adap,
+ unsigned char *send_buf,
+ int send_buf_len,
+ int swap32)
+{
+ int ret, actual_len;
+
+ ret = usb_bulk_msg(bus_adap->usb_dev,
+ usb_sndbulkpipe(bus_adap->usb_dev, 1),
+ send_buf, send_buf_len, &actual_len, 200);
+ if (ret) {
+ dev_dbg(&bus_adap->usb_dev->dev,
+ "usb_bulk_msg(send) failed, err %i\n", ret);
+ return ret;
+ }
+
+ if (actual_len != send_buf_len) {
+ dev_dbg(&bus_adap->usb_dev->dev, "only wrote %d of %d bytes\n",
+ actual_len, send_buf_len);
+ return -1;
+ }
+ return actual_len;
+}
+
+static int as102_read_ep2(struct as10x_bus_adapter_t *bus_adap,
+ unsigned char *recv_buf, int recv_buf_len)
+{
+ int ret, actual_len;
+
+ if (recv_buf == NULL)
+ return -EINVAL;
+
+ ret = usb_bulk_msg(bus_adap->usb_dev,
+ usb_rcvbulkpipe(bus_adap->usb_dev, 2),
+ recv_buf, recv_buf_len, &actual_len, 200);
+ if (ret) {
+ dev_dbg(&bus_adap->usb_dev->dev,
+ "usb_bulk_msg(recv) failed, err %i\n", ret);
+ return ret;
+ }
+
+ if (actual_len != recv_buf_len) {
+ dev_dbg(&bus_adap->usb_dev->dev, "only read %d of %d bytes\n",
+ actual_len, recv_buf_len);
+ return -1;
+ }
+ return actual_len;
+}
+
+static struct as102_priv_ops_t as102_priv_ops = {
+ .upload_fw_pkt = as102_send_ep1,
+ .xfer_cmd = as102_usb_xfer_cmd,
+ .as102_read_ep2 = as102_read_ep2,
+ .start_stream = as102_usb_start_stream,
+ .stop_stream = as102_usb_stop_stream,
+};
+
+static int as102_submit_urb_stream(struct as102_dev_t *dev, struct urb *urb)
+{
+ int err;
+
+ usb_fill_bulk_urb(urb,
+ dev->bus_adap.usb_dev,
+ usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),
+ urb->transfer_buffer,
+ AS102_USB_BUF_SIZE,
+ as102_urb_stream_irq,
+ dev);
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err)
+ dev_dbg(&urb->dev->dev,
+ "%s: usb_submit_urb failed\n", __func__);
+
+ return err;
+}
+
+void as102_urb_stream_irq(struct urb *urb)
+{
+ struct as102_dev_t *as102_dev = urb->context;
+
+ if (urb->actual_length > 0) {
+ dvb_dmx_swfilter(&as102_dev->dvb_dmx,
+ urb->transfer_buffer,
+ urb->actual_length);
+ } else {
+ if (urb->actual_length == 0)
+ memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);
+ }
+
+ /* is not stopped, re-submit urb */
+ if (as102_dev->streaming)
+ as102_submit_urb_stream(as102_dev, urb);
+}
+
+static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)
+{
+ int i;
+
+ for (i = 0; i < MAX_STREAM_URB; i++)
+ usb_free_urb(dev->stream_urb[i]);
+
+ usb_free_coherent(dev->bus_adap.usb_dev,
+ MAX_STREAM_URB * AS102_USB_BUF_SIZE,
+ dev->stream,
+ dev->dma_addr);
+}
+
+static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
+{
+ int i;
+
+ dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,
+ MAX_STREAM_URB * AS102_USB_BUF_SIZE,
+ GFP_KERNEL,
+ &dev->dma_addr);
+ if (!dev->stream) {
+ dev_dbg(&dev->bus_adap.usb_dev->dev,
+ "%s: usb_buffer_alloc failed\n", __func__);
+ return -ENOMEM;
+ }
+
+ memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);
+
+ /* init urb buffers */
+ for (i = 0; i < MAX_STREAM_URB; i++) {
+ struct urb *urb;
+
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (urb == NULL) {
+ dev_dbg(&dev->bus_adap.usb_dev->dev,
+ "%s: usb_alloc_urb failed\n", __func__);
+ as102_free_usb_stream_buffer(dev);
+ return -ENOMEM;
+ }
+
+ urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
+ urb->transfer_dma = dev->dma_addr + (i * AS102_USB_BUF_SIZE);
+ urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ urb->transfer_buffer_length = AS102_USB_BUF_SIZE;
+
+ dev->stream_urb[i] = urb;
+ }
+ return 0;
+}
+
+static void as102_usb_stop_stream(struct as102_dev_t *dev)
+{
+ int i;
+
+ for (i = 0; i < MAX_STREAM_URB; i++)
+ usb_kill_urb(dev->stream_urb[i]);
+}
+
+static int as102_usb_start_stream(struct as102_dev_t *dev)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < MAX_STREAM_URB; i++) {
+ ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);
+ if (ret) {
+ as102_usb_stop_stream(dev);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void as102_usb_release(struct kref *kref)
+{
+ struct as102_dev_t *as102_dev;
+
+ as102_dev = container_of(kref, struct as102_dev_t, kref);
+ if (as102_dev != NULL) {
+ usb_put_dev(as102_dev->bus_adap.usb_dev);
+ kfree(as102_dev);
+ }
+}
+
+static void as102_usb_disconnect(struct usb_interface *intf)
+{
+ struct as102_dev_t *as102_dev;
+
+ /* extract as102_dev_t from usb_device private data */
+ as102_dev = usb_get_intfdata(intf);
+
+ /* unregister dvb layer */
+ as102_dvb_unregister(as102_dev);
+
+ /* free usb buffers */
+ as102_free_usb_stream_buffer(as102_dev);
+
+ usb_set_intfdata(intf, NULL);
+
+ /* usb unregister device */
+ usb_deregister_dev(intf, &as102_usb_class_driver);
+
+ /* decrement usage counter */
+ kref_put(&as102_dev->kref, as102_usb_release);
+
+ pr_info("%s: device has been disconnected\n", DRIVER_NAME);
+}
+
+static int as102_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ int ret;
+ struct as102_dev_t *as102_dev;
+ int i;
+
+ /* This should never actually happen */
+ if (ARRAY_SIZE(as102_usb_id_table) !=
+ (sizeof(as102_device_names) / sizeof(const char *))) {
+ pr_err("Device names table invalid size");
+ return -EINVAL;
+ }
+
+ as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
+ if (as102_dev == NULL)
+ return -ENOMEM;
+
+ /* Assign the user-friendly device name */
+ for (i = 0; i < ARRAY_SIZE(as102_usb_id_table); i++) {
+ if (id == &as102_usb_id_table[i]) {
+ as102_dev->name = as102_device_names[i];
+ as102_dev->elna_cfg = as102_elna_cfg[i];
+ }
+ }
+
+ if (as102_dev->name == NULL)
+ as102_dev->name = "Unknown AS102 device";
+
+ /* set private callback functions */
+ as102_dev->bus_adap.ops = &as102_priv_ops;
+
+ /* init cmd token for usb bus */
+ as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;
+ as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;
+
+ /* init kernel device reference */
+ kref_init(&as102_dev->kref);
+
+ /* store as102 device to usb_device private data */
+ usb_set_intfdata(intf, (void *) as102_dev);
+
+ /* store in as102 device the usb_device pointer */
+ as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));
+
+ /* we can register the device now, as it is ready */
+ ret = usb_register_dev(intf, &as102_usb_class_driver);
+ if (ret < 0) {
+ /* something prevented us from registering this driver */
+ dev_err(&intf->dev,
+ "%s: usb_register_dev() failed (errno = %d)\n",
+ __func__, ret);
+ goto failed;
+ }
+
+ pr_info("%s: device has been detected\n", DRIVER_NAME);
+
+ /* request buffer allocation for streaming */
+ ret = as102_alloc_usb_stream_buffer(as102_dev);
+ if (ret != 0)
+ goto failed_stream;
+
+ /* register dvb layer */
+ ret = as102_dvb_register(as102_dev);
+ if (ret != 0)
+ goto failed_dvb;
+
+ return ret;
+
+failed_dvb:
+ as102_free_usb_stream_buffer(as102_dev);
+failed_stream:
+ usb_deregister_dev(intf, &as102_usb_class_driver);
+failed:
+ usb_put_dev(as102_dev->bus_adap.usb_dev);
+ usb_set_intfdata(intf, NULL);
+ kfree(as102_dev);
+ return ret;
+}
+
+static int as102_open(struct inode *inode, struct file *file)
+{
+ int ret = 0, minor = 0;
+ struct usb_interface *intf = NULL;
+ struct as102_dev_t *dev = NULL;
+
+ /* read minor from inode */
+ minor = iminor(inode);
+
+ /* fetch device from usb interface */
+ intf = usb_find_interface(&as102_usb_driver, minor);
+ if (intf == NULL) {
+ pr_err("%s: can't find device for minor %d\n",
+ __func__, minor);
+ ret = -ENODEV;
+ goto exit;
+ }
+
+ /* get our device */
+ dev = usb_get_intfdata(intf);
+ if (dev == NULL) {
+ ret = -EFAULT;
+ goto exit;
+ }
+
+ /* save our device object in the file's private structure */
+ file->private_data = dev;
+
+ /* increment our usage count for the device */
+ kref_get(&dev->kref);
+
+exit:
+ return ret;
+}
+
+static int as102_release(struct inode *inode, struct file *file)
+{
+ struct as102_dev_t *dev = NULL;
+
+ dev = file->private_data;
+ if (dev != NULL) {
+ /* decrement the count on our device */
+ kref_put(&dev->kref, as102_usb_release);
+ }
+
+ return 0;
+}
+
+MODULE_DEVICE_TABLE(usb, as102_usb_id_table);

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