kernel-fxtec-pro1x/drivers/media/dvb/b2c2/flexcop.c
Patrick Boettcher 382c5546d6 V4L/DVB (10694): [PATCH] software IRQ watchdog for Flexcop B2C2 DVB PCI cards
With (some) Technisat cards you cannot run multiple DVB applications
in parallel and switch the channel at the same time.

There seems to be a problem on the interfaces or even inside the flexcop-device
that can't handle interruption on the streaming interface.

This patch adds a watchdog to check whether data is supposed to come in
(streaming PIDs are requested) and if no data is seen within 400ms (default) it
resets the streaming/pid-filtering hardware.

This patch is urgently needed to support the rev 2.8 of the hardware and solves
problem occassionally seen on older hardware.

Signed-off-by: Uwe Bugla <uwe.bugla@gmx.de>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-02-26 22:29:18 -03:00

315 lines
8.5 KiB
C

/*
* flexcop.c - driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
*
* Copyright (C) 2004-5 Patrick Boettcher <patrick.boettcher@desy.de>
*
* based on the skystar2-driver
* Copyright (C) 2003 Vadim Catana, skystar@moldova.cc
*
* Acknowledgements:
* John Jurrius from BBTI, Inc. for extensive support with
* code examples and data books
*
* Bjarne Steinsbo, bjarne at steinsbo.com (some ideas for rewriting)
*
* Contributions to the skystar2-driver have been done by
* Vincenzo Di Massa, hawk.it at tiscalinet.it (several DiSEqC fixes)
* Roberto Ragusa, r.ragusa at libero.it (polishing, restyling the code)
* Niklas Peinecke, peinecke at gdv.uni-hannover.de (hardware pid/mac filtering)
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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 Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "flexcop.h"
#define DRIVER_NAME "B2C2 FlexcopII/II(b)/III digital TV receiver chip"
#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de"
#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
#define DEBSTATUS ""
#else
#define DEBSTATUS " (debugging is not enabled)"
#endif
int b2c2_flexcop_debug;
module_param_named(debug, b2c2_flexcop_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debug level (1=info,2=tuner,4=i2c,8=ts,16=sram,32=reg (|-able))." DEBSTATUS);
#undef DEBSTATUS
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
/* global zero for ibi values */
flexcop_ibi_value ibi_zero;
static int flexcop_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
struct flexcop_device *fc = dvbdmxfeed->demux->priv;
return flexcop_pid_feed_control(fc,dvbdmxfeed,1);
}
static int flexcop_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
struct flexcop_device *fc = dvbdmxfeed->demux->priv;
return flexcop_pid_feed_control(fc,dvbdmxfeed,0);
}
static int flexcop_dvb_init(struct flexcop_device *fc)
{
int ret = dvb_register_adapter(&fc->dvb_adapter,
"FlexCop Digital TV device", fc->owner,
fc->dev, adapter_nr);
if (ret < 0) {
err("error registering DVB adapter");
return ret;
}
fc->dvb_adapter.priv = fc;
fc->demux.dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING);
fc->demux.priv = fc;
fc->demux.filternum = fc->demux.feednum = FC_MAX_FEED;
fc->demux.start_feed = flexcop_dvb_start_feed;
fc->demux.stop_feed = flexcop_dvb_stop_feed;
fc->demux.write_to_decoder = NULL;
if ((ret = dvb_dmx_init(&fc->demux)) < 0) {
err("dvb_dmx failed: error %d",ret);
goto err_dmx;
}
fc->hw_frontend.source = DMX_FRONTEND_0;
fc->dmxdev.filternum = fc->demux.feednum;
fc->dmxdev.demux = &fc->demux.dmx;
fc->dmxdev.capabilities = 0;
if ((ret = dvb_dmxdev_init(&fc->dmxdev, &fc->dvb_adapter)) < 0) {
err("dvb_dmxdev_init failed: error %d",ret);
goto err_dmx_dev;
}
if ((ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->hw_frontend)) < 0) {
err("adding hw_frontend to dmx failed: error %d",ret);
goto err_dmx_add_hw_frontend;
}
fc->mem_frontend.source = DMX_MEMORY_FE;
if ((ret = fc->demux.dmx.add_frontend(&fc->demux.dmx, &fc->mem_frontend)) < 0) {
err("adding mem_frontend to dmx failed: error %d",ret);
goto err_dmx_add_mem_frontend;
}
if ((ret = fc->demux.dmx.connect_frontend(&fc->demux.dmx, &fc->hw_frontend)) < 0) {
err("connect frontend failed: error %d",ret);
goto err_connect_frontend;
}
dvb_net_init(&fc->dvb_adapter, &fc->dvbnet, &fc->demux.dmx);
fc->init_state |= FC_STATE_DVB_INIT;
return 0;
err_connect_frontend:
fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->mem_frontend);
err_dmx_add_mem_frontend:
fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->hw_frontend);
err_dmx_add_hw_frontend:
dvb_dmxdev_release(&fc->dmxdev);
err_dmx_dev:
dvb_dmx_release(&fc->demux);
err_dmx:
dvb_unregister_adapter(&fc->dvb_adapter);
return ret;
}
static void flexcop_dvb_exit(struct flexcop_device *fc)
{
if (fc->init_state & FC_STATE_DVB_INIT) {
dvb_net_release(&fc->dvbnet);
fc->demux.dmx.close(&fc->demux.dmx);
fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->mem_frontend);
fc->demux.dmx.remove_frontend(&fc->demux.dmx,&fc->hw_frontend);
dvb_dmxdev_release(&fc->dmxdev);
dvb_dmx_release(&fc->demux);
dvb_unregister_adapter(&fc->dvb_adapter);
deb_info("deinitialized dvb stuff\n");
}
fc->init_state &= ~FC_STATE_DVB_INIT;
}
/* these methods are necessary to achieve the long-term-goal of hiding the
* struct flexcop_device from the bus-parts */
void flexcop_pass_dmx_data(struct flexcop_device *fc, u8 *buf, u32 len)
{
dvb_dmx_swfilter(&fc->demux, buf, len);
}
EXPORT_SYMBOL(flexcop_pass_dmx_data);
void flexcop_pass_dmx_packets(struct flexcop_device *fc, u8 *buf, u32 no)
{
dvb_dmx_swfilter_packets(&fc->demux, buf, no);
}
EXPORT_SYMBOL(flexcop_pass_dmx_packets);
static void flexcop_reset(struct flexcop_device *fc)
{
flexcop_ibi_value v210,v204;
/* reset the flexcop itself */
fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
v210.raw = 0;
v210.sw_reset_210.reset_block_000 = 1;
v210.sw_reset_210.reset_block_100 = 1;
v210.sw_reset_210.reset_block_200 = 1;
v210.sw_reset_210.reset_block_300 = 1;
v210.sw_reset_210.reset_block_400 = 1;
v210.sw_reset_210.reset_block_500 = 1;
v210.sw_reset_210.reset_block_600 = 1;
v210.sw_reset_210.reset_block_700 = 1;
v210.sw_reset_210.Block_reset_enable = 0xb2;
v210.sw_reset_210.Special_controls = 0xc259;
fc->write_ibi_reg(fc,sw_reset_210,v210);
msleep(1);
/* reset the periphical devices */
v204 = fc->read_ibi_reg(fc,misc_204);
v204.misc_204.Per_reset_sig = 0;
fc->write_ibi_reg(fc,misc_204,v204);
msleep(1);
v204.misc_204.Per_reset_sig = 1;
fc->write_ibi_reg(fc,misc_204,v204);
}
void flexcop_reset_block_300(struct flexcop_device *fc)
{
flexcop_ibi_value v208_save = fc->read_ibi_reg(fc,ctrl_208),
v210 = fc->read_ibi_reg(fc,sw_reset_210);
deb_rdump("208: %08x, 210: %08x\n",v208_save.raw,v210.raw);
fc->write_ibi_reg(fc,ctrl_208,ibi_zero);
v210.sw_reset_210.reset_block_300 = 1;
v210.sw_reset_210.Block_reset_enable = 0xb2;
fc->write_ibi_reg(fc,sw_reset_210,v210);
udelay(1000);
fc->write_ibi_reg(fc,ctrl_208,v208_save);
}
struct flexcop_device *flexcop_device_kmalloc(size_t bus_specific_len)
{
void *bus;
struct flexcop_device *fc = kzalloc(sizeof(struct flexcop_device), GFP_KERNEL);
if (!fc) {
err("no memory");
return NULL;
}
bus = kzalloc(bus_specific_len, GFP_KERNEL);
if (!bus) {
err("no memory");
kfree(fc);
return NULL;
}
fc->bus_specific = bus;
return fc;
}
EXPORT_SYMBOL(flexcop_device_kmalloc);
void flexcop_device_kfree(struct flexcop_device *fc)
{
kfree(fc->bus_specific);
kfree(fc);
}
EXPORT_SYMBOL(flexcop_device_kfree);
int flexcop_device_initialize(struct flexcop_device *fc)
{
int ret;
ibi_zero.raw = 0;
flexcop_reset(fc);
flexcop_determine_revision(fc);
flexcop_sram_init(fc);
flexcop_hw_filter_init(fc);
flexcop_smc_ctrl(fc, 0);
if ((ret = flexcop_dvb_init(fc)))
goto error;
/* i2c has to be done before doing EEProm stuff -
* because the EEProm is accessed via i2c */
ret = flexcop_i2c_init(fc);
if (ret)
goto error;
/* do the MAC address reading after initializing the dvb_adapter */
if (fc->get_mac_addr(fc, 0) == 0) {
u8 *b = fc->dvb_adapter.proposed_mac;
info("MAC address = %pM", b);
flexcop_set_mac_filter(fc,b);
flexcop_mac_filter_ctrl(fc,1);
} else
warn("reading of MAC address failed.\n");
if ((ret = flexcop_frontend_init(fc)))
goto error;
flexcop_device_name(fc,"initialization of","complete");
return 0;
error:
flexcop_device_exit(fc);
return ret;
}
EXPORT_SYMBOL(flexcop_device_initialize);
void flexcop_device_exit(struct flexcop_device *fc)
{
flexcop_frontend_exit(fc);
flexcop_i2c_exit(fc);
flexcop_dvb_exit(fc);
}
EXPORT_SYMBOL(flexcop_device_exit);
static int flexcop_module_init(void)
{
info(DRIVER_NAME " loaded successfully");
return 0;
}
static void flexcop_module_cleanup(void)
{
info(DRIVER_NAME " unloaded successfully");
}
module_init(flexcop_module_init);
module_exit(flexcop_module_cleanup);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_NAME);
MODULE_LICENSE("GPL");