// SPDX-License-Identifier: GPL-2.0-only
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/*
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* tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices
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*
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* Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include "tm6000.h"
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#include "tm6000-regs.h"
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#include "zl10353.h"
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#include <media/tuner.h>
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#include "tuner-xc2028.h"
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#include "xc5000.h"
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MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
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MODULE_AUTHOR("Mauro Carvalho Chehab");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},{{Trident, tm6000},{{Trident, tm6010}");
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable debug message");
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static inline void print_err_status(struct tm6000_core *dev,
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int packet, int status)
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{
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char *errmsg = "Unknown";
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switch (status) {
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case -ENOENT:
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errmsg = "unlinked synchronously";
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break;
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case -ECONNRESET:
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errmsg = "unlinked asynchronously";
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break;
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case -ENOSR:
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errmsg = "Buffer error (overrun)";
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break;
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case -EPIPE:
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errmsg = "Stalled (device not responding)";
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break;
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case -EOVERFLOW:
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errmsg = "Babble (bad cable?)";
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break;
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case -EPROTO:
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errmsg = "Bit-stuff error (bad cable?)";
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break;
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case -EILSEQ:
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errmsg = "CRC/Timeout (could be anything)";
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break;
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case -ETIME:
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errmsg = "Device does not respond";
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break;
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}
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if (packet < 0) {
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dprintk(dev, 1, "URB status %d [%s].\n",
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status, errmsg);
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} else {
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dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
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packet, status, errmsg);
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}
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}
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static void tm6000_urb_received(struct urb *urb)
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{
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int ret;
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struct tm6000_core *dev = urb->context;
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switch (urb->status) {
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case 0:
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case -ETIMEDOUT:
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break;
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case -ENOENT:
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case -ECONNRESET:
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case -ESHUTDOWN:
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return;
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default:
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print_err_status(dev, 0, urb->status);
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}
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if (urb->actual_length > 0)
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dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
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urb->actual_length);
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if (dev->dvb->streams > 0) {
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ret = usb_submit_urb(urb, GFP_ATOMIC);
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if (ret < 0) {
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printk(KERN_ERR "tm6000: error %s\n", __func__);
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kfree(urb->transfer_buffer);
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usb_free_urb(urb);
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dev->dvb->bulk_urb = NULL;
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}
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}
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}
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static int tm6000_start_stream(struct tm6000_core *dev)
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{
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int ret;
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unsigned int pipe, size;
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struct tm6000_dvb *dvb = dev->dvb;
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printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
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if (dev->mode != TM6000_MODE_DIGITAL) {
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tm6000_init_digital_mode(dev);
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dev->mode = TM6000_MODE_DIGITAL;
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}
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dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!dvb->bulk_urb)
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return -ENOMEM;
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pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
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& USB_ENDPOINT_NUMBER_MASK);
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size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
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size = size * 15; /* 512 x 8 or 12 or 15 */
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dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
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if (!dvb->bulk_urb->transfer_buffer) {
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usb_free_urb(dvb->bulk_urb);
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dvb->bulk_urb = NULL;
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return -ENOMEM;
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}
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usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
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dvb->bulk_urb->transfer_buffer,
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size,
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tm6000_urb_received, dev);
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ret = usb_clear_halt(dev->udev, pipe);
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if (ret < 0) {
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printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
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ret, __func__);
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kfree(dvb->bulk_urb->transfer_buffer);
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usb_free_urb(dvb->bulk_urb);
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dvb->bulk_urb = NULL;
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return ret;
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} else
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printk(KERN_ERR "tm6000: pipe reset\n");
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/* mutex_lock(&tm6000_driver.open_close_mutex); */
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ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
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/* mutex_unlock(&tm6000_driver.open_close_mutex); */
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if (ret) {
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printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
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ret);
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kfree(dvb->bulk_urb->transfer_buffer);
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usb_free_urb(dvb->bulk_urb);
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dvb->bulk_urb = NULL;
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return ret;
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}
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return 0;
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}
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static void tm6000_stop_stream(struct tm6000_core *dev)
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{
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struct tm6000_dvb *dvb = dev->dvb;
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if (dvb->bulk_urb) {
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printk(KERN_INFO "urb killing\n");
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usb_kill_urb(dvb->bulk_urb);
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printk(KERN_INFO "urb buffer free\n");
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kfree(dvb->bulk_urb->transfer_buffer);
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usb_free_urb(dvb->bulk_urb);
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dvb->bulk_urb = NULL;
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}
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}
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static int tm6000_start_feed(struct dvb_demux_feed *feed)
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{
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struct dvb_demux *demux = feed->demux;
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struct tm6000_core *dev = demux->priv;
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struct tm6000_dvb *dvb = dev->dvb;
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printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
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mutex_lock(&dvb->mutex);
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if (dvb->streams == 0) {
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dvb->streams = 1;
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/* mutex_init(&tm6000_dev->streming_mutex); */
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tm6000_start_stream(dev);
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} else
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++(dvb->streams);
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mutex_unlock(&dvb->mutex);
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return 0;
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}
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static int tm6000_stop_feed(struct dvb_demux_feed *feed)
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{
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struct dvb_demux *demux = feed->demux;
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struct tm6000_core *dev = demux->priv;
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struct tm6000_dvb *dvb = dev->dvb;
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printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
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mutex_lock(&dvb->mutex);
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printk(KERN_INFO "stream %#x\n", dvb->streams);
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--(dvb->streams);
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if (dvb->streams == 0) {
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printk(KERN_INFO "stop stream\n");
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tm6000_stop_stream(dev);
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/* mutex_destroy(&tm6000_dev->streaming_mutex); */
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}
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mutex_unlock(&dvb->mutex);
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/* mutex_destroy(&tm6000_dev->streaming_mutex); */
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return 0;
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}
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static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
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{
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struct tm6000_dvb *dvb = dev->dvb;
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if (dev->caps.has_zl10353) {
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struct zl10353_config config = {
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.demod_address = dev->demod_addr,
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.no_tuner = 1,
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.parallel_ts = 1,
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.if2 = 45700,
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.disable_i2c_gate_ctrl = 1,
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};
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dvb->frontend = dvb_attach(zl10353_attach, &config,
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&dev->i2c_adap);
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} else {
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printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
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return -1;
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}
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return (!dvb->frontend) ? -1 : 0;
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}
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DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
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static int register_dvb(struct tm6000_core *dev)
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{
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int ret = -1;
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struct tm6000_dvb *dvb = dev->dvb;
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mutex_init(&dvb->mutex);
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dvb->streams = 0;
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/* attach the frontend */
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ret = tm6000_dvb_attach_frontend(dev);
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if (ret < 0) {
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printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
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goto err;
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}
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ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
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THIS_MODULE, &dev->udev->dev, adapter_nr);
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if (ret < 0) {
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pr_err("tm6000: couldn't register the adapter!\n");
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goto err;
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}
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dvb->adapter.priv = dev;
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if (dvb->frontend) {
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switch (dev->tuner_type) {
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case TUNER_XC2028: {
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struct xc2028_config cfg = {
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.i2c_adap = &dev->i2c_adap,
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.i2c_addr = dev->tuner_addr,
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};
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dvb->frontend->callback = tm6000_tuner_callback;
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ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
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if (ret < 0) {
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printk(KERN_ERR
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"tm6000: couldn't register frontend\n");
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goto adapter_err;
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}
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if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
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printk(KERN_ERR "tm6000: couldn't register frontend (xc3028)\n");
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ret = -EINVAL;
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goto frontend_err;
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}
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printk(KERN_INFO "tm6000: XC2028/3028 asked to be attached to frontend!\n");
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break;
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}
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case TUNER_XC5000: {
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struct xc5000_config cfg = {
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.i2c_address = dev->tuner_addr,
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};
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dvb->frontend->callback = tm6000_xc5000_callback;
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ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
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if (ret < 0) {
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printk(KERN_ERR
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"tm6000: couldn't register frontend\n");
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goto adapter_err;
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}
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if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
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printk(KERN_ERR "tm6000: couldn't register frontend (xc5000)\n");
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ret = -EINVAL;
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goto frontend_err;
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}
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printk(KERN_INFO "tm6000: XC5000 asked to be attached to frontend!\n");
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break;
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}
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}
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} else
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printk(KERN_ERR "tm6000: no frontend found\n");
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dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
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| DMX_MEMORY_BASED_FILTERING;
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dvb->demux.priv = dev;
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dvb->demux.filternum = 8;
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dvb->demux.feednum = 8;
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dvb->demux.start_feed = tm6000_start_feed;
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dvb->demux.stop_feed = tm6000_stop_feed;
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dvb->demux.write_to_decoder = NULL;
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ret = dvb_dmx_init(&dvb->demux);
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if (ret < 0) {
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printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
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goto frontend_err;
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}
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dvb->dmxdev.filternum = dev->dvb->demux.filternum;
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dvb->dmxdev.demux = &dev->dvb->demux.dmx;
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dvb->dmxdev.capabilities = 0;
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ret = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
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if (ret < 0) {
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printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
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goto dvb_dmx_err;
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}
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return 0;
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dvb_dmx_err:
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dvb_dmx_release(&dvb->demux);
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frontend_err:
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if (dvb->frontend) {
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dvb_unregister_frontend(dvb->frontend);
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dvb_frontend_detach(dvb->frontend);
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}
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adapter_err:
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dvb_unregister_adapter(&dvb->adapter);
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err:
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return ret;
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}
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static void unregister_dvb(struct tm6000_core *dev)
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{
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struct tm6000_dvb *dvb = dev->dvb;
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if (dvb->bulk_urb) {
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struct urb *bulk_urb = dvb->bulk_urb;
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kfree(bulk_urb->transfer_buffer);
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bulk_urb->transfer_buffer = NULL;
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usb_unlink_urb(bulk_urb);
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usb_free_urb(bulk_urb);
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}
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/* mutex_lock(&tm6000_driver.open_close_mutex); */
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if (dvb->frontend) {
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dvb_unregister_frontend(dvb->frontend);
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dvb_frontend_detach(dvb->frontend);
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}
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dvb_dmxdev_release(&dvb->dmxdev);
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dvb_dmx_release(&dvb->demux);
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dvb_unregister_adapter(&dvb->adapter);
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mutex_destroy(&dvb->mutex);
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/* mutex_unlock(&tm6000_driver.open_close_mutex); */
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}
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static int dvb_init(struct tm6000_core *dev)
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{
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struct tm6000_dvb *dvb;
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int rc;
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if (!dev)
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return 0;
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if (!dev->caps.has_dvb)
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return 0;
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if (dev->udev->speed == USB_SPEED_FULL) {
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printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
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return 0;
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}
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dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
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if (!dvb)
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return -ENOMEM;
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dev->dvb = dvb;
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rc = register_dvb(dev);
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if (rc < 0) {
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kfree(dvb);
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dev->dvb = NULL;
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return 0;
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}
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return 0;
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}
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static int dvb_fini(struct tm6000_core *dev)
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{
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if (!dev)
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return 0;
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if (!dev->caps.has_dvb)
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return 0;
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if (dev->dvb) {
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unregister_dvb(dev);
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kfree(dev->dvb);
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dev->dvb = NULL;
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}
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return 0;
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}
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static struct tm6000_ops dvb_ops = {
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.type = TM6000_DVB,
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.name = "TM6000 dvb Extension",
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.init = dvb_init,
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.fini = dvb_fini,
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};
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static int __init tm6000_dvb_register(void)
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{
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return tm6000_register_extension(&dvb_ops);
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}
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static void __exit tm6000_dvb_unregister(void)
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{
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tm6000_unregister_extension(&dvb_ops);
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}
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module_init(tm6000_dvb_register);
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module_exit(tm6000_dvb_unregister);
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