474 lines
11 KiB
C
474 lines
11 KiB
C
/*
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DVB device driver for em28xx
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(c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
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(c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
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- Fixes for the driver to properly work with HVR-950
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(c) 2008 Aidan Thornton <makosoft@googlemail.com>
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Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
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(c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
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(c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
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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 of the License.
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*/
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#include <linux/kernel.h>
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#include <linux/usb.h>
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#include "em28xx.h"
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#include <media/v4l2-common.h>
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#include <media/videobuf-vmalloc.h>
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#include "lgdt330x.h"
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#include "zl10353.h"
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MODULE_DESCRIPTION("driver for em28xx based DVB cards");
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MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
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MODULE_LICENSE("GPL");
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static unsigned int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
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DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
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#define dprintk(level, fmt, arg...) do { \
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if (debug >= level) \
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printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
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} while (0)
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#define EM28XX_DVB_NUM_BUFS 5
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#define EM28XX_DVB_MAX_PACKETSIZE 564
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#define EM28XX_DVB_MAX_PACKETS 64
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struct em28xx_dvb {
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struct dvb_frontend *frontend;
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/* feed count management */
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struct mutex lock;
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int nfeeds;
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/* general boilerplate stuff */
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struct dvb_adapter adapter;
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struct dvb_demux demux;
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struct dmxdev dmxdev;
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struct dmx_frontend fe_hw;
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struct dmx_frontend fe_mem;
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struct dvb_net net;
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};
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static inline void print_err_status(struct em28xx *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 synchronuously";
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break;
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case -ECONNRESET:
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errmsg = "unlinked asynchronuously";
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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(1, "URB status %d [%s].\n", status, errmsg);
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} else {
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dprintk(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 inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
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{
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int i;
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if (!dev)
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return 0;
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if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
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return 0;
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if (urb->status < 0) {
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print_err_status(dev, -1, urb->status);
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if (urb->status == -ENOENT)
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return 0;
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}
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for (i = 0; i < urb->number_of_packets; i++) {
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int status = urb->iso_frame_desc[i].status;
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if (status < 0) {
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print_err_status(dev, i, status);
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if (urb->iso_frame_desc[i].status != -EPROTO)
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continue;
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}
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dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
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urb->iso_frame_desc[i].offset,
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urb->iso_frame_desc[i].actual_length);
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}
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return 0;
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}
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static int start_streaming(struct em28xx_dvb *dvb)
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{
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int rc;
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struct em28xx *dev = dvb->adapter.priv;
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usb_set_interface(dev->udev, 0, 1);
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rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
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if (rc < 0)
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return rc;
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return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
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EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
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dvb_isoc_copy);
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}
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static int stop_streaming(struct em28xx_dvb *dvb)
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{
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struct em28xx *dev = dvb->adapter.priv;
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em28xx_uninit_isoc(dev);
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em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
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return 0;
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}
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static int 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 em28xx_dvb *dvb = demux->priv;
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int rc, ret;
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if (!demux->dmx.frontend)
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return -EINVAL;
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mutex_lock(&dvb->lock);
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dvb->nfeeds++;
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rc = dvb->nfeeds;
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if (dvb->nfeeds == 1) {
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ret = start_streaming(dvb);
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if (ret < 0)
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rc = ret;
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}
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mutex_unlock(&dvb->lock);
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return rc;
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}
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static int 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 em28xx_dvb *dvb = demux->priv;
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int err = 0;
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mutex_lock(&dvb->lock);
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dvb->nfeeds--;
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if (0 == dvb->nfeeds)
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err = stop_streaming(dvb);
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mutex_unlock(&dvb->lock);
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return err;
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}
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/* ------------------------------------------------------------------ */
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static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
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{
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struct em28xx *dev = fe->dvb->priv;
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if (acquire)
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return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
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else
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return em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
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}
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/* ------------------------------------------------------------------ */
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static struct lgdt330x_config em2880_lgdt3303_dev = {
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.demod_address = 0x0e,
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.demod_chip = LGDT3303,
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};
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static struct zl10353_config em28xx_zl10353_with_xc3028 = {
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.demod_address = (0x1e >> 1),
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.no_tuner = 1,
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.parallel_ts = 1,
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.if2 = 45600,
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};
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/* ------------------------------------------------------------------ */
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static int attach_xc3028(u8 addr, struct em28xx *dev)
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{
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struct dvb_frontend *fe;
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struct xc2028_config cfg;
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memset(&cfg, 0, sizeof(cfg));
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cfg.i2c_adap = &dev->i2c_adap;
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cfg.i2c_addr = addr;
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cfg.callback = em28xx_tuner_callback;
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if (!dev->dvb->frontend) {
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printk(KERN_ERR "%s/2: dvb frontend not attached. "
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"Can't attach xc3028\n",
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dev->name);
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return -EINVAL;
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}
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fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
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if (!fe) {
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printk(KERN_ERR "%s/2: xc3028 attach failed\n",
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dev->name);
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dvb_frontend_detach(dev->dvb->frontend);
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dev->dvb->frontend = NULL;
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return -EINVAL;
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}
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printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
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return 0;
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}
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/* ------------------------------------------------------------------ */
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int register_dvb(struct em28xx_dvb *dvb,
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struct module *module,
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struct em28xx *dev,
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struct device *device)
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{
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int result;
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mutex_init(&dvb->lock);
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/* register adapter */
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result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
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adapter_nr);
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if (result < 0) {
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printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
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dev->name, result);
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goto fail_adapter;
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}
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/* Ensure all frontends negotiate bus access */
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dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
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dvb->adapter.priv = dev;
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/* register frontend */
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result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
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if (result < 0) {
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printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
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dev->name, result);
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goto fail_frontend;
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}
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/* register demux stuff */
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dvb->demux.dmx.capabilities =
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DMX_TS_FILTERING | DMX_SECTION_FILTERING |
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DMX_MEMORY_BASED_FILTERING;
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dvb->demux.priv = dvb;
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dvb->demux.filternum = 256;
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dvb->demux.feednum = 256;
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dvb->demux.start_feed = start_feed;
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dvb->demux.stop_feed = stop_feed;
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result = dvb_dmx_init(&dvb->demux);
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if (result < 0) {
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printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
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dev->name, result);
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goto fail_dmx;
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}
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dvb->dmxdev.filternum = 256;
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dvb->dmxdev.demux = &dvb->demux.dmx;
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dvb->dmxdev.capabilities = 0;
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result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
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if (result < 0) {
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printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
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dev->name, result);
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goto fail_dmxdev;
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}
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dvb->fe_hw.source = DMX_FRONTEND_0;
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result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
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if (result < 0) {
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printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
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dev->name, result);
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goto fail_fe_hw;
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}
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dvb->fe_mem.source = DMX_MEMORY_FE;
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result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
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if (result < 0) {
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printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
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dev->name, result);
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goto fail_fe_mem;
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}
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result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
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if (result < 0) {
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printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
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dev->name, result);
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goto fail_fe_conn;
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}
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/* register network adapter */
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dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
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return 0;
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fail_fe_conn:
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dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
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fail_fe_mem:
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dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
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fail_fe_hw:
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dvb_dmxdev_release(&dvb->dmxdev);
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fail_dmxdev:
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dvb_dmx_release(&dvb->demux);
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fail_dmx:
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dvb_unregister_frontend(dvb->frontend);
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fail_frontend:
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dvb_frontend_detach(dvb->frontend);
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dvb_unregister_adapter(&dvb->adapter);
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fail_adapter:
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return result;
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}
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static void unregister_dvb(struct em28xx_dvb *dvb)
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{
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dvb_net_release(&dvb->net);
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dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
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dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
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dvb_dmxdev_release(&dvb->dmxdev);
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dvb_dmx_release(&dvb->demux);
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dvb_unregister_frontend(dvb->frontend);
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dvb_frontend_detach(dvb->frontend);
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dvb_unregister_adapter(&dvb->adapter);
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}
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static int dvb_init(struct em28xx *dev)
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{
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int result = 0;
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struct em28xx_dvb *dvb;
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dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
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if (dvb == NULL) {
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printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
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return -ENOMEM;
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}
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dev->dvb = dvb;
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em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
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/* init frontend */
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switch (dev->model) {
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case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
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dvb->frontend = dvb_attach(lgdt330x_attach,
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&em2880_lgdt3303_dev,
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&dev->i2c_adap);
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if (attach_xc3028(0x61, dev) < 0) {
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result = -EINVAL;
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goto out_free;
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}
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break;
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case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
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dvb->frontend = dvb_attach(zl10353_attach,
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&em28xx_zl10353_with_xc3028,
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&dev->i2c_adap);
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if (attach_xc3028(0x61, dev) < 0) {
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result = -EINVAL;
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goto out_free;
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}
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break;
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default:
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printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
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" isn't supported yet\n",
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dev->name);
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break;
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}
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if (NULL == dvb->frontend) {
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printk(KERN_ERR
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"%s/2: frontend initialization failed\n",
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dev->name);
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result = -EINVAL;
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goto out_free;
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}
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/* register everything */
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result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
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if (result < 0)
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goto out_free;
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em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
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printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
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return 0;
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out_free:
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em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
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kfree(dvb);
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dev->dvb = NULL;
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return result;
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}
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static int dvb_fini(struct em28xx *dev)
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{
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if (dev->dvb) {
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unregister_dvb(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 em28xx_ops dvb_ops = {
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.id = EM28XX_DVB,
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.name = "Em28xx 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 em28xx_dvb_register(void)
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{
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return em28xx_register_extension(&dvb_ops);
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}
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static void __exit em28xx_dvb_unregister(void)
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{
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em28xx_unregister_extension(&dvb_ops);
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}
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module_init(em28xx_dvb_register);
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module_exit(em28xx_dvb_unregister);
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