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budget-core.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 "budget.h"
#include "ttpci-eeprom.h"

#define TS_WIDTH        (2 * TS_SIZE)
#define TS_WIDTH_ACTIVY       TS_SIZE
#define TS_WIDTH_DVBC         TS_SIZE
#define TS_HEIGHT_MASK        0xf00
#define TS_HEIGHT_MASK_ACTIVY 0xc00
#define TS_HEIGHT_MASK_DVBC   0xe00
#define TS_MIN_BUFSIZE_K      188
#define TS_MAX_BUFSIZE_K      1410
#define TS_MAX_BUFSIZE_K_ACTIVY     564
#define TS_MAX_BUFSIZE_K_DVBC 1316
#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;
      case BUDGET_CIN1200C_MK3:
      case BUDGET_KNC1C_MK3:
      case BUDGET_KNC1CP_MK3:
            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, 0x00000600);
                  saa7146_write(dev, MC2, (MASK_09 | MASK_25 | 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);
      if (budget->buffer_size > budget->buffer_height * budget->buffer_width) {
            // using odd/even buffers
            saa7146_write(dev, BASE_EVEN3, budget->buffer_height * budget->buffer_width);
      } else {
            // using a single buffer
            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;

      /* Ensure streamed PCI data is synced to CPU */
      pci_dma_sync_sg_for_cpu(budget->dev->pci, budget->pt.slist, budget->pt.nents, PCI_DMA_FROMDEVICE);

      /* 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;

      switch(budget->card->type) {
      case BUDGET_FS_ACTIVY:
            budget->buffer_width = TS_WIDTH_ACTIVY;
            max_bufsize = TS_MAX_BUFSIZE_K_ACTIVY;
            height_mask = TS_HEIGHT_MASK_ACTIVY;
            break;

      case BUDGET_KNC1C:
      case BUDGET_KNC1CP:
      case BUDGET_CIN1200C:
      case BUDGET_KNC1C_MK3:
      case BUDGET_KNC1CP_MK3:
      case BUDGET_CIN1200C_MK3:
            budget->buffer_width = TS_WIDTH_DVBC;
            max_bufsize = TS_MAX_BUFSIZE_K_DVBC;
            height_mask = TS_HEIGHT_MASK_DVBC;
            break;

      default:
            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;
      if (budget->buffer_height > 0xfff) {
            budget->buffer_height /= 2;
            budget->buffer_height &= height_mask;
            budget->buffer_size = 2 * budget->buffer_height * budget->buffer_width;
      } else {
            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: buffer type = %s, width = %d, height = %d\n",
            budget->dev->name,
            budget->buffer_size > budget->buffer_width * budget->buffer_height ? "odd/even" : "single",
            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) {
            ret = -ENOMEM;
            goto err_dvb_unregister;
      }

      ttpci_eeprom_parse_mac(&budget->i2c_adap, budget->dvb_adapter.proposed_mac);

      budget->grabbing = saa7146_vmalloc_build_pgtable(dev->pci, budget->buffer_size, &budget->pt);
      if (NULL == budget->grabbing) {
            ret = -ENOMEM;
            goto err_del_i2c;
      }

      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 ((ret = budget_register(budget)) == 0)
            return 0; /* Everything OK */

      /* An error occurred, cleanup resources */
      saa7146_vfree_destroy_pgtable(dev->pci, budget->grabbing, &budget->pt);

err_del_i2c:
      i2c_del_adapter(&budget->i2c_adap);

err_dvb_unregister:
      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);

      tasklet_kill(&budget->vpe_tasklet);

      saa7146_vfree_destroy_pgtable(dev->pci, budget->grabbing, &budget->pt);

      i2c_del_adapter(&budget->i2c_adap);

      dvb_unregister_adapter(&budget->dvb_adapter);

      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");

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