satip-axe/kernel/drivers/media/video/cx231xx/cx231xx-dvb.c

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/*
DVB device driver for cx231xx
Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
Based on em28xx driver
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/usb.h>
#include "cx231xx.h"
#include <media/v4l2-common.h>
#include <media/videobuf-vmalloc.h>
#include "xc5000.h"
#include "dvb_dummy_fe.h"
MODULE_DESCRIPTION("driver for cx231xx based DVB cards");
MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
MODULE_LICENSE("GPL");
static unsigned int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
#define dprintk(level, fmt, arg...) do { \
if (debug >= level) \
printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
} while (0)
#define CX231XX_DVB_NUM_BUFS 5
#define CX231XX_DVB_MAX_PACKETSIZE 564
#define CX231XX_DVB_MAX_PACKETS 64
struct cx231xx_dvb {
struct dvb_frontend *frontend;
/* feed count management */
struct mutex lock;
int nfeeds;
/* general boilerplate stuff */
struct dvb_adapter adapter;
struct dvb_demux demux;
struct dmxdev dmxdev;
struct dmx_frontend fe_hw;
struct dmx_frontend fe_mem;
struct dvb_net net;
};
static inline void print_err_status(struct cx231xx *dev, int packet, int status)
{
char *errmsg = "Unknown";
switch (status) {
case -ENOENT:
errmsg = "unlinked synchronuously";
break;
case -ECONNRESET:
errmsg = "unlinked asynchronuously";
break;
case -ENOSR:
errmsg = "Buffer error (overrun)";
break;
case -EPIPE:
errmsg = "Stalled (device not responding)";
break;
case -EOVERFLOW:
errmsg = "Babble (bad cable?)";
break;
case -EPROTO:
errmsg = "Bit-stuff error (bad cable?)";
break;
case -EILSEQ:
errmsg = "CRC/Timeout (could be anything)";
break;
case -ETIME:
errmsg = "Device does not respond";
break;
}
if (packet < 0) {
dprintk(1, "URB status %d [%s].\n", status, errmsg);
} else {
dprintk(1, "URB packet %d, status %d [%s].\n",
packet, status, errmsg);
}
}
static inline int dvb_isoc_copy(struct cx231xx *dev, struct urb *urb)
{
int i;
if (!dev)
return 0;
if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
return 0;
if (urb->status < 0) {
print_err_status(dev, -1, urb->status);
if (urb->status == -ENOENT)
return 0;
}
for (i = 0; i < urb->number_of_packets; i++) {
int status = urb->iso_frame_desc[i].status;
if (status < 0) {
print_err_status(dev, i, status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
urb->iso_frame_desc[i].offset,
urb->iso_frame_desc[i].actual_length);
}
return 0;
}
static int start_streaming(struct cx231xx_dvb *dvb)
{
int rc;
struct cx231xx *dev = dvb->adapter.priv;
usb_set_interface(dev->udev, 0, 1);
rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
if (rc < 0)
return rc;
return cx231xx_init_isoc(dev, CX231XX_DVB_MAX_PACKETS,
CX231XX_DVB_NUM_BUFS,
CX231XX_DVB_MAX_PACKETSIZE, dvb_isoc_copy);
}
static int stop_streaming(struct cx231xx_dvb *dvb)
{
struct cx231xx *dev = dvb->adapter.priv;
cx231xx_uninit_isoc(dev);
cx231xx_set_mode(dev, CX231XX_SUSPEND);
return 0;
}
static int start_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct cx231xx_dvb *dvb = demux->priv;
int rc, ret;
if (!demux->dmx.frontend)
return -EINVAL;
mutex_lock(&dvb->lock);
dvb->nfeeds++;
rc = dvb->nfeeds;
if (dvb->nfeeds == 1) {
ret = start_streaming(dvb);
if (ret < 0)
rc = ret;
}
mutex_unlock(&dvb->lock);
return rc;
}
static int stop_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct cx231xx_dvb *dvb = demux->priv;
int err = 0;
mutex_lock(&dvb->lock);
dvb->nfeeds--;
if (0 == dvb->nfeeds)
err = stop_streaming(dvb);
mutex_unlock(&dvb->lock);
return err;
}
/* ------------------------------------------------------------------ */
static int cx231xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
struct cx231xx *dev = fe->dvb->priv;
if (acquire)
return cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
else
return cx231xx_set_mode(dev, CX231XX_SUSPEND);
}
/* ------------------------------------------------------------------ */
static struct xc5000_config cnxt_rde250_tunerconfig = {
.i2c_address = 0x61,
.if_khz = 5380,
};
/* ------------------------------------------------------------------ */
#if 0
static int attach_xc5000(u8 addr, struct cx231xx *dev)
{
struct dvb_frontend *fe;
struct xc5000_config cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.i2c_adap = &dev->i2c_bus[1].i2c_adap;
cfg.i2c_addr = addr;
if (!dev->dvb->frontend) {
printk(KERN_ERR "%s/2: dvb frontend not attached. "
"Can't attach xc5000\n", dev->name);
return -EINVAL;
}
fe = dvb_attach(xc5000_attach, dev->dvb->frontend, &cfg);
if (!fe) {
printk(KERN_ERR "%s/2: xc5000 attach failed\n", dev->name);
dvb_frontend_detach(dev->dvb->frontend);
dev->dvb->frontend = NULL;
return -EINVAL;
}
printk(KERN_INFO "%s/2: xc5000 attached\n", dev->name);
return 0;
}
#endif
int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq)
{
int status = 0;
if ((dev->dvb != NULL) && (dev->dvb->frontend != NULL)) {
struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
if (dops->set_analog_params != NULL) {
struct analog_parameters params;
params.frequency = freq;
params.std = dev->norm;
params.mode = 0; /* 0- Air; 1 - cable */
/*params.audmode = ; */
/* Set the analog parameters to set the frequency */
cx231xx_info("Setting Frequency for XC5000\n");
dops->set_analog_params(dev->dvb->frontend, &params);
}
}
return status;
}
int cx231xx_reset_analog_tuner(struct cx231xx *dev)
{
int status = 0;
if ((dev->dvb != NULL) && (dev->dvb->frontend != NULL)) {
struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
if (dops->init != NULL && !dev->xc_fw_load_done) {
cx231xx_info("Reloading firmware for XC5000\n");
status = dops->init(dev->dvb->frontend);
if (status == 0) {
dev->xc_fw_load_done = 1;
cx231xx_info
("XC5000 firmware download completed\n");
} else {
dev->xc_fw_load_done = 0;
cx231xx_info
("XC5000 firmware download failed !!!\n");
}
}
}
return status;
}
/* ------------------------------------------------------------------ */
static int register_dvb(struct cx231xx_dvb *dvb,
struct module *module,
struct cx231xx *dev, struct device *device)
{
int result;
mutex_init(&dvb->lock);
/* register adapter */
result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
adapter_nr);
if (result < 0) {
printk(KERN_WARNING
"%s: dvb_register_adapter failed (errno = %d)\n",
dev->name, result);
goto fail_adapter;
}
/* Ensure all frontends negotiate bus access */
dvb->frontend->ops.ts_bus_ctrl = cx231xx_dvb_bus_ctrl;
dvb->adapter.priv = dev;
/* register frontend */
result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
if (result < 0) {
printk(KERN_WARNING
"%s: dvb_register_frontend failed (errno = %d)\n",
dev->name, result);
goto fail_frontend;
}
/* register demux stuff */
dvb->demux.dmx.capabilities =
DMX_TS_FILTERING | DMX_SECTION_FILTERING |
DMX_MEMORY_BASED_FILTERING;
dvb->demux.priv = dvb;
dvb->demux.filternum = 256;
dvb->demux.feednum = 256;
dvb->demux.start_feed = start_feed;
dvb->demux.stop_feed = stop_feed;
result = dvb_dmx_init(&dvb->demux);
if (result < 0) {
printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
dev->name, result);
goto fail_dmx;
}
dvb->dmxdev.filternum = 256;
dvb->dmxdev.demux = &dvb->demux.dmx;
dvb->dmxdev.capabilities = 0;
result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
if (result < 0) {
printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
dev->name, result);
goto fail_dmxdev;
}
dvb->fe_hw.source = DMX_FRONTEND_0;
result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
if (result < 0) {
printk(KERN_WARNING
"%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
dev->name, result);
goto fail_fe_hw;
}
dvb->fe_mem.source = DMX_MEMORY_FE;
result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
if (result < 0) {
printk(KERN_WARNING
"%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
dev->name, result);
goto fail_fe_mem;
}
result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
if (result < 0) {
printk(KERN_WARNING
"%s: connect_frontend failed (errno = %d)\n", dev->name,
result);
goto fail_fe_conn;
}
/* register network adapter */
dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
return 0;
fail_fe_conn:
dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
fail_fe_mem:
dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
fail_fe_hw:
dvb_dmxdev_release(&dvb->dmxdev);
fail_dmxdev:
dvb_dmx_release(&dvb->demux);
fail_dmx:
dvb_unregister_frontend(dvb->frontend);
fail_frontend:
dvb_frontend_detach(dvb->frontend);
dvb_unregister_adapter(&dvb->adapter);
fail_adapter:
return result;
}
static void unregister_dvb(struct cx231xx_dvb *dvb)
{
dvb_net_release(&dvb->net);
dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
dvb_dmxdev_release(&dvb->dmxdev);
dvb_dmx_release(&dvb->demux);
dvb_unregister_frontend(dvb->frontend);
dvb_frontend_detach(dvb->frontend);
dvb_unregister_adapter(&dvb->adapter);
}
static int dvb_init(struct cx231xx *dev)
{
int result = 0;
struct cx231xx_dvb *dvb;
if (!dev->board.has_dvb) {
/* This device does not support the extension */
return 0;
}
dvb = kzalloc(sizeof(struct cx231xx_dvb), GFP_KERNEL);
if (dvb == NULL) {
printk(KERN_INFO "cx231xx_dvb: memory allocation failed\n");
return -ENOMEM;
}
dev->dvb = dvb;
dev->cx231xx_set_analog_freq = cx231xx_set_analog_freq;
dev->cx231xx_reset_analog_tuner = cx231xx_reset_analog_tuner;
cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
/* init frontend */
switch (dev->model) {
case CX231XX_BOARD_CNXT_RDE_250:
/* dev->dvb->frontend = dvb_attach(s5h1411_attach,
&dvico_s5h1411_config,
&dev->i2c_bus[1].i2c_adap); */
dev->dvb->frontend = dvb_attach(dvb_dummy_fe_ofdm_attach);
if (dev->dvb->frontend == NULL) {
printk(DRIVER_NAME
": Failed to attach dummy front end\n");
result = -EINVAL;
goto out_free;
}
/* define general-purpose callback pointer */
dvb->frontend->callback = cx231xx_tuner_callback;
if (dvb_attach(xc5000_attach, dev->dvb->frontend,
&dev->i2c_bus[1].i2c_adap,
&cnxt_rde250_tunerconfig) < 0) {
result = -EINVAL;
goto out_free;
}
break;
case CX231XX_BOARD_CNXT_RDU_250:
dev->dvb->frontend = dvb_attach(dvb_dummy_fe_ofdm_attach);
if (dev->dvb->frontend == NULL) {
printk(DRIVER_NAME
": Failed to attach dummy front end\n");
result = -EINVAL;
goto out_free;
}
/* define general-purpose callback pointer */
dvb->frontend->callback = cx231xx_tuner_callback;
if (dvb_attach(xc5000_attach, dev->dvb->frontend,
&dev->i2c_bus[1].i2c_adap,
&cnxt_rde250_tunerconfig) < 0) {
result = -EINVAL;
goto out_free;
}
break;
default:
printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
" isn't supported yet\n", dev->name);
break;
}
if (NULL == dvb->frontend) {
printk(KERN_ERR
"%s/2: frontend initialization failed\n", dev->name);
result = -EINVAL;
goto out_free;
}
/* register everything */
result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
if (result < 0)
goto out_free;
cx231xx_set_mode(dev, CX231XX_SUSPEND);
printk(KERN_INFO "Successfully loaded cx231xx-dvb\n");
return 0;
out_free:
cx231xx_set_mode(dev, CX231XX_SUSPEND);
kfree(dvb);
dev->dvb = NULL;
return result;
}
static int dvb_fini(struct cx231xx *dev)
{
if (!dev->board.has_dvb) {
/* This device does not support the extension */
return 0;
}
if (dev->dvb) {
unregister_dvb(dev->dvb);
dev->dvb = NULL;
}
return 0;
}
static struct cx231xx_ops dvb_ops = {
.id = CX231XX_DVB,
.name = "Cx231xx dvb Extension",
.init = dvb_init,
.fini = dvb_fini,
};
static int __init cx231xx_dvb_register(void)
{
return cx231xx_register_extension(&dvb_ops);
}
static void __exit cx231xx_dvb_unregister(void)
{
cx231xx_unregister_extension(&dvb_ops);
}
module_init(cx231xx_dvb_register);
module_exit(cx231xx_dvb_unregister);