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