/*
* 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 const 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 const 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) {
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);
