linux/drivers/media/dvb/ttpci/budget-core.c
Oliver Endriss 32e4c3a562 V4L/DVB (4323): [budget/budget-av/budget-ci/budget-patch drivers] fixed DMA start/stop code
Fix bug reported by Andrew de Quincey:
After cold boot the saa7146 DMA did not start if the demuxer was opened
before the frontend has locked to the signal.
DMA transfers will be started now if (and only if)
the frontend is locked and data should be sent to the demuxer.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-07-29 17:22:23 -03:00

560 lines
15 KiB
C

/*
* budget-core.c: driver for the SAA7146 based Budget DVB cards
*
* Compiled from various sources by Michael Hunold <michael@mihu.de>
*
* Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
*
* Copyright (C) 1999-2002 Ralph Metzler
* & Marcus Metzler for convergence integrated media GmbH
*
* 26feb2004 Support for FS Activy Card (Grundig tuner) by
* Michael Dreher <michael@5dot1.de>,
* Oliver Endriss <o.endriss@gmx.de>,
* Andreas 'randy' Weinberger
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
*
*
* the project's page is at http://www.linuxtv.org/dvb/
*/
#include <linux/moduleparam.h>
#include "budget.h"
#include "ttpci-eeprom.h"
#define TS_WIDTH (2 * TS_SIZE)
#define TS_WIDTH_ACTIVY TS_SIZE
#define TS_HEIGHT_MASK 0xf00
#define TS_HEIGHT_MASK_ACTIVY 0xc00
#define TS_MIN_BUFSIZE_K 188
#define TS_MAX_BUFSIZE_K 1410
#define TS_MAX_BUFSIZE_K_ACTIVY 564
#define BUFFER_WARNING_WAIT (30*HZ)
int budget_debug;
static int dma_buffer_size = TS_MIN_BUFSIZE_K;
module_param_named(debug, budget_debug, int, 0644);
module_param_named(bufsize, dma_buffer_size, int, 0444);
MODULE_PARM_DESC(debug, "Turn on/off budget debugging (default:off).");
MODULE_PARM_DESC(bufsize, "DMA buffer size in KB, default: 188, min: 188, max: 1410 (Activy: 564)");
/****************************************************************************
* TT budget / WinTV Nova
****************************************************************************/
static int stop_ts_capture(struct budget *budget)
{
dprintk(2, "budget: %p\n", budget);
saa7146_write(budget->dev, MC1, MASK_20); // DMA3 off
SAA7146_IER_DISABLE(budget->dev, MASK_10);
return 0;
}
static int start_ts_capture(struct budget *budget)
{
struct saa7146_dev *dev = budget->dev;
dprintk(2, "budget: %p\n", budget);
if (!budget->feeding || !budget->fe_synced)
return 0;
saa7146_write(dev, MC1, MASK_20); // DMA3 off
memset(budget->grabbing, 0x00, budget->buffer_size);
saa7146_write(dev, PCI_BT_V1, 0x001c0000 | (saa7146_read(dev, PCI_BT_V1) & ~0x001f0000));
budget->ttbp = 0;
/*
* Signal path on the Activy:
*
* tuner -> SAA7146 port A -> SAA7146 BRS -> SAA7146 DMA3 -> memory
*
* Since the tuner feeds 204 bytes packets into the SAA7146,
* DMA3 is configured to strip the trailing 16 FEC bytes:
* Pitch: 188, NumBytes3: 188, NumLines3: 1024
*/
switch(budget->card->type) {
case BUDGET_FS_ACTIVY:
saa7146_write(dev, DD1_INIT, 0x04000000);
saa7146_write(dev, MC2, (MASK_09 | MASK_25));
saa7146_write(dev, BRS_CTRL, 0x00000000);
break;
case BUDGET_PATCH:
saa7146_write(dev, DD1_INIT, 0x00000200);
saa7146_write(dev, MC2, (MASK_10 | MASK_26));
saa7146_write(dev, BRS_CTRL, 0x60000000);
break;
default:
if (budget->video_port == BUDGET_VIDEO_PORTA) {
saa7146_write(dev, DD1_INIT, 0x06000200);
saa7146_write(dev, MC2, (MASK_09 | MASK_25 | MASK_10 | MASK_26));
saa7146_write(dev, BRS_CTRL, 0x00000000);
} else {
saa7146_write(dev, DD1_INIT, 0x02000600);
saa7146_write(dev, MC2, (MASK_09 | MASK_25 | MASK_10 | MASK_26));
saa7146_write(dev, BRS_CTRL, 0x60000000);
}
}
saa7146_write(dev, MC2, (MASK_08 | MASK_24));
mdelay(10);
saa7146_write(dev, BASE_ODD3, 0);
saa7146_write(dev, BASE_EVEN3, 0);
saa7146_write(dev, PROT_ADDR3, budget->buffer_size);
saa7146_write(dev, BASE_PAGE3, budget->pt.dma | ME1 | 0x90);
saa7146_write(dev, PITCH3, budget->buffer_width);
saa7146_write(dev, NUM_LINE_BYTE3,
(budget->buffer_height << 16) | budget->buffer_width);
saa7146_write(dev, MC2, (MASK_04 | MASK_20));
SAA7146_ISR_CLEAR(budget->dev, MASK_10); /* VPE */
SAA7146_IER_ENABLE(budget->dev, MASK_10); /* VPE */
saa7146_write(dev, MC1, (MASK_04 | MASK_20)); /* DMA3 on */
return 0;
}
static int budget_read_fe_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct budget *budget = (struct budget *) fe->dvb->priv;
int synced;
int ret;
if (budget->read_fe_status)
ret = budget->read_fe_status(fe, status);
else
ret = -EINVAL;
if (!ret) {
synced = (*status & FE_HAS_LOCK);
if (synced != budget->fe_synced) {
budget->fe_synced = synced;
spin_lock(&budget->feedlock);
if (synced)
start_ts_capture(budget);
else
stop_ts_capture(budget);
spin_unlock(&budget->feedlock);
}
}
return ret;
}
static void vpeirq(unsigned long data)
{
struct budget *budget = (struct budget *) data;
u8 *mem = (u8 *) (budget->grabbing);
u32 olddma = budget->ttbp;
u32 newdma = saa7146_read(budget->dev, PCI_VDP3);
u32 count;
/* nearest lower position divisible by 188 */
newdma -= newdma % 188;
if (newdma >= budget->buffer_size)
return;
budget->ttbp = newdma;
if (budget->feeding == 0 || newdma == olddma)
return;
if (newdma > olddma) { /* no wraparound, dump olddma..newdma */
count = newdma - olddma;
dvb_dmx_swfilter_packets(&budget->demux, mem + olddma, count / 188);
} else { /* wraparound, dump olddma..buflen and 0..newdma */
count = budget->buffer_size - olddma;
dvb_dmx_swfilter_packets(&budget->demux, mem + olddma, count / 188);
count += newdma;
dvb_dmx_swfilter_packets(&budget->demux, mem, newdma / 188);
}
if (count > budget->buffer_warning_threshold)
budget->buffer_warnings++;
if (budget->buffer_warnings && time_after(jiffies, budget->buffer_warning_time)) {
printk("%s %s: used %d times >80%% of buffer (%u bytes now)\n",
budget->dev->name, __FUNCTION__, budget->buffer_warnings, count);
budget->buffer_warning_time = jiffies + BUFFER_WARNING_WAIT;
budget->buffer_warnings = 0;
}
}
int ttpci_budget_debiread(struct budget *budget, u32 config, int addr, int count,
int uselocks, int nobusyloop)
{
struct saa7146_dev *saa = budget->dev;
int result = 0;
unsigned long flags = 0;
if (count > 4 || count <= 0)
return 0;
if (uselocks)
spin_lock_irqsave(&budget->debilock, flags);
if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
if (uselocks)
spin_unlock_irqrestore(&budget->debilock, flags);
return result;
}
saa7146_write(saa, DEBI_COMMAND, (count << 17) | 0x10000 | (addr & 0xffff));
saa7146_write(saa, DEBI_CONFIG, config);
saa7146_write(saa, DEBI_PAGE, 0);
saa7146_write(saa, MC2, (2 << 16) | 2);
if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
if (uselocks)
spin_unlock_irqrestore(&budget->debilock, flags);
return result;
}
result = saa7146_read(saa, DEBI_AD);
result &= (0xffffffffUL >> ((4 - count) * 8));
if (uselocks)
spin_unlock_irqrestore(&budget->debilock, flags);
return result;
}
int ttpci_budget_debiwrite(struct budget *budget, u32 config, int addr,
int count, u32 value, int uselocks, int nobusyloop)
{
struct saa7146_dev *saa = budget->dev;
unsigned long flags = 0;
int result;
if (count > 4 || count <= 0)
return 0;
if (uselocks)
spin_lock_irqsave(&budget->debilock, flags);
if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
if (uselocks)
spin_unlock_irqrestore(&budget->debilock, flags);
return result;
}
saa7146_write(saa, DEBI_COMMAND, (count << 17) | 0x00000 | (addr & 0xffff));
saa7146_write(saa, DEBI_CONFIG, config);
saa7146_write(saa, DEBI_PAGE, 0);
saa7146_write(saa, DEBI_AD, value);
saa7146_write(saa, MC2, (2 << 16) | 2);
if ((result = saa7146_wait_for_debi_done(saa, nobusyloop)) < 0) {
if (uselocks)
spin_unlock_irqrestore(&budget->debilock, flags);
return result;
}
if (uselocks)
spin_unlock_irqrestore(&budget->debilock, flags);
return 0;
}
/****************************************************************************
* DVB API SECTION
****************************************************************************/
static int budget_start_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct budget *budget = (struct budget *) demux->priv;
int status = 0;
dprintk(2, "budget: %p\n", budget);
if (!demux->dmx.frontend)
return -EINVAL;
spin_lock(&budget->feedlock);
feed->pusi_seen = 0; /* have a clean section start */
if (budget->feeding++ == 0)
status = start_ts_capture(budget);
spin_unlock(&budget->feedlock);
return status;
}
static int budget_stop_feed(struct dvb_demux_feed *feed)
{
struct dvb_demux *demux = feed->demux;
struct budget *budget = (struct budget *) demux->priv;
int status = 0;
dprintk(2, "budget: %p\n", budget);
spin_lock(&budget->feedlock);
if (--budget->feeding == 0)
status = stop_ts_capture(budget);
spin_unlock(&budget->feedlock);
return status;
}
static int budget_register(struct budget *budget)
{
struct dvb_demux *dvbdemux = &budget->demux;
int ret;
dprintk(2, "budget: %p\n", budget);
dvbdemux->priv = (void *) budget;
dvbdemux->filternum = 256;
dvbdemux->feednum = 256;
dvbdemux->start_feed = budget_start_feed;
dvbdemux->stop_feed = budget_stop_feed;
dvbdemux->write_to_decoder = NULL;
dvbdemux->dmx.capabilities = (DMX_TS_FILTERING | DMX_SECTION_FILTERING |
DMX_MEMORY_BASED_FILTERING);
dvb_dmx_init(&budget->demux);
budget->dmxdev.filternum = 256;
budget->dmxdev.demux = &dvbdemux->dmx;
budget->dmxdev.capabilities = 0;
dvb_dmxdev_init(&budget->dmxdev, &budget->dvb_adapter);
budget->hw_frontend.source = DMX_FRONTEND_0;
ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->hw_frontend);
if (ret < 0)
return ret;
budget->mem_frontend.source = DMX_MEMORY_FE;
ret = dvbdemux->dmx.add_frontend(&dvbdemux->dmx, &budget->mem_frontend);
if (ret < 0)
return ret;
ret = dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, &budget->hw_frontend);
if (ret < 0)
return ret;
dvb_net_init(&budget->dvb_adapter, &budget->dvb_net, &dvbdemux->dmx);
return 0;
}
static void budget_unregister(struct budget *budget)
{
struct dvb_demux *dvbdemux = &budget->demux;
dprintk(2, "budget: %p\n", budget);
dvb_net_release(&budget->dvb_net);
dvbdemux->dmx.close(&dvbdemux->dmx);
dvbdemux->dmx.remove_frontend(&dvbdemux->dmx, &budget->hw_frontend);
dvbdemux->dmx.remove_frontend(&dvbdemux->dmx, &budget->mem_frontend);
dvb_dmxdev_release(&budget->dmxdev);
dvb_dmx_release(&budget->demux);
}
int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev,
struct saa7146_pci_extension_data *info,
struct module *owner)
{
int ret = 0;
struct budget_info *bi = info->ext_priv;
int max_bufsize;
int height_mask;
memset(budget, 0, sizeof(struct budget));
dprintk(2, "dev: %p, budget: %p\n", dev, budget);
budget->card = bi;
budget->dev = (struct saa7146_dev *) dev;
if (budget->card->type == BUDGET_FS_ACTIVY) {
budget->buffer_width = TS_WIDTH_ACTIVY;
max_bufsize = TS_MAX_BUFSIZE_K_ACTIVY;
height_mask = TS_HEIGHT_MASK_ACTIVY;
} else {
budget->buffer_width = TS_WIDTH;
max_bufsize = TS_MAX_BUFSIZE_K;
height_mask = TS_HEIGHT_MASK;
}
if (dma_buffer_size < TS_MIN_BUFSIZE_K)
dma_buffer_size = TS_MIN_BUFSIZE_K;
else if (dma_buffer_size > max_bufsize)
dma_buffer_size = max_bufsize;
budget->buffer_height = dma_buffer_size * 1024 / budget->buffer_width;
budget->buffer_height &= height_mask;
budget->buffer_size = budget->buffer_height * budget->buffer_width;
budget->buffer_warning_threshold = budget->buffer_size * 80/100;
budget->buffer_warnings = 0;
budget->buffer_warning_time = jiffies;
dprintk(2, "%s: width = %d, height = %d\n",
budget->dev->name, budget->buffer_width, budget->buffer_height);
printk("%s: dma buffer size %u\n", budget->dev->name, budget->buffer_size);
if ((ret = dvb_register_adapter(&budget->dvb_adapter, budget->card->name, owner, &budget->dev->pci->dev)) < 0) {
return ret;
}
/* set dd1 stream a & b */
saa7146_write(dev, DD1_STREAM_B, 0x00000000);
saa7146_write(dev, MC2, (MASK_09 | MASK_25));
saa7146_write(dev, MC2, (MASK_10 | MASK_26));
saa7146_write(dev, DD1_INIT, 0x02000000);
saa7146_write(dev, MC2, (MASK_09 | MASK_25 | MASK_10 | MASK_26));
if (bi->type != BUDGET_FS_ACTIVY)
budget->video_port = BUDGET_VIDEO_PORTB;
else
budget->video_port = BUDGET_VIDEO_PORTA;
spin_lock_init(&budget->feedlock);
spin_lock_init(&budget->debilock);
/* the Siemens DVB needs this if you want to have the i2c chips
get recognized before the main driver is loaded */
if (bi->type != BUDGET_FS_ACTIVY)
saa7146_write(dev, GPIO_CTRL, 0x500000); /* GPIO 3 = 1 */
#ifdef I2C_ADAP_CLASS_TV_DIGITAL
budget->i2c_adap.class = I2C_ADAP_CLASS_TV_DIGITAL;
#else
budget->i2c_adap.class = I2C_CLASS_TV_DIGITAL;
#endif
strlcpy(budget->i2c_adap.name, budget->card->name, sizeof(budget->i2c_adap.name));
saa7146_i2c_adapter_prepare(dev, &budget->i2c_adap, SAA7146_I2C_BUS_BIT_RATE_120);
strcpy(budget->i2c_adap.name, budget->card->name);
if (i2c_add_adapter(&budget->i2c_adap) < 0) {
dvb_unregister_adapter(&budget->dvb_adapter);
return -ENOMEM;
}
ttpci_eeprom_parse_mac(&budget->i2c_adap, budget->dvb_adapter.proposed_mac);
if (NULL ==
(budget->grabbing = saa7146_vmalloc_build_pgtable(dev->pci, budget->buffer_size, &budget->pt))) {
ret = -ENOMEM;
goto err;
}
saa7146_write(dev, PCI_BT_V1, 0x001c0000);
/* upload all */
saa7146_write(dev, GPIO_CTRL, 0x000000);
tasklet_init(&budget->vpe_tasklet, vpeirq, (unsigned long) budget);
/* frontend power on */
if (bi->type != BUDGET_FS_ACTIVY)
saa7146_setgpio(dev, 2, SAA7146_GPIO_OUTHI);
if (budget_register(budget) == 0) {
return 0;
}
err:
i2c_del_adapter(&budget->i2c_adap);
vfree(budget->grabbing);
dvb_unregister_adapter(&budget->dvb_adapter);
return ret;
}
void ttpci_budget_init_hooks(struct budget *budget)
{
if (budget->dvb_frontend && !budget->read_fe_status) {
budget->read_fe_status = budget->dvb_frontend->ops.read_status;
budget->dvb_frontend->ops.read_status = budget_read_fe_status;
}
}
int ttpci_budget_deinit(struct budget *budget)
{
struct saa7146_dev *dev = budget->dev;
dprintk(2, "budget: %p\n", budget);
budget_unregister(budget);
i2c_del_adapter(&budget->i2c_adap);
dvb_unregister_adapter(&budget->dvb_adapter);
tasklet_kill(&budget->vpe_tasklet);
saa7146_pgtable_free(dev->pci, &budget->pt);
vfree(budget->grabbing);
return 0;
}
void ttpci_budget_irq10_handler(struct saa7146_dev *dev, u32 * isr)
{
struct budget *budget = (struct budget *) dev->ext_priv;
dprintk(8, "dev: %p, budget: %p\n", dev, budget);
if (*isr & MASK_10)
tasklet_schedule(&budget->vpe_tasklet);
}
void ttpci_budget_set_video_port(struct saa7146_dev *dev, int video_port)
{
struct budget *budget = (struct budget *) dev->ext_priv;
spin_lock(&budget->feedlock);
budget->video_port = video_port;
if (budget->feeding) {
stop_ts_capture(budget);
start_ts_capture(budget);
}
spin_unlock(&budget->feedlock);
}
EXPORT_SYMBOL_GPL(ttpci_budget_debiread);
EXPORT_SYMBOL_GPL(ttpci_budget_debiwrite);
EXPORT_SYMBOL_GPL(ttpci_budget_init);
EXPORT_SYMBOL_GPL(ttpci_budget_init_hooks);
EXPORT_SYMBOL_GPL(ttpci_budget_deinit);
EXPORT_SYMBOL_GPL(ttpci_budget_irq10_handler);
EXPORT_SYMBOL_GPL(ttpci_budget_set_video_port);
EXPORT_SYMBOL_GPL(budget_debug);
MODULE_LICENSE("GPL");