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bt878.c

/*
 * bt878.c: part of the driver for the Pinnacle PCTV Sat DVB PCI card
 *
 * Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@htp-tel.de>
 *
 * large parts based on the bttv driver
 * Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@metzlerbros.de)
 *                        & Marcus Metzler (mocm@metzlerbros.de)
 * (c) 1999,2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
 *
 * 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
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <linux/ioport.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/init.h>

#include "dmxdev.h"
#include "dvbdev.h"
#include "bt878.h"
#include "dst_priv.h"


/**************************************/
/* Miscellaneous utility  definitions */
/**************************************/

static unsigned int bt878_verbose = 1;
static unsigned int bt878_debug;

module_param_named(verbose, bt878_verbose, int, 0444);
MODULE_PARM_DESC(verbose,
             "verbose startup messages, default is 1 (yes)");
module_param_named(debug, bt878_debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");

int bt878_num;
struct bt878 bt878[BT878_MAX];

EXPORT_SYMBOL(bt878_num);
EXPORT_SYMBOL(bt878);

#define btwrite(dat,adr)    bmtwrite((dat), (bt->bt878_mem+(adr)))
#define btread(adr)         bmtread(bt->bt878_mem+(adr))

#define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
#define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)

#if defined(dprintk)
#undef dprintk
#endif
#define dprintk if(bt878_debug) printk

static void bt878_mem_free(struct bt878 *bt)
{
      if (bt->buf_cpu) {
            pci_free_consistent(bt->dev, bt->buf_size, bt->buf_cpu,
                            bt->buf_dma);
            bt->buf_cpu = NULL;
      }

      if (bt->risc_cpu) {
            pci_free_consistent(bt->dev, bt->risc_size, bt->risc_cpu,
                            bt->risc_dma);
            bt->risc_cpu = NULL;
      }
}

static int bt878_mem_alloc(struct bt878 *bt)
{
      if (!bt->buf_cpu) {
            bt->buf_size = 128 * 1024;

            bt->buf_cpu =
                pci_alloc_consistent(bt->dev, bt->buf_size,
                               &bt->buf_dma);

            if (!bt->buf_cpu)
                  return -ENOMEM;

            memset(bt->buf_cpu, 0, bt->buf_size);
      }

      if (!bt->risc_cpu) {
            bt->risc_size = PAGE_SIZE;
            bt->risc_cpu =
                pci_alloc_consistent(bt->dev, bt->risc_size,
                               &bt->risc_dma);

            if (!bt->risc_cpu) {
                  bt878_mem_free(bt);
                  return -ENOMEM;
            }

            memset(bt->risc_cpu, 0, bt->risc_size);
      }

      return 0;
}

/* RISC instructions */
#define RISC_WRITE            (0x01 << 28)
#define RISC_JUMP       (0x07 << 28)
#define RISC_SYNC       (0x08 << 28)

/* RISC bits */
#define RISC_WR_SOL           (1 << 27)
#define RISC_WR_EOL           (1 << 26)
#define RISC_IRQ        (1 << 24)
#define RISC_STATUS(status)   ((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
#define RISC_SYNC_RESYNC      (1 << 15)
#define RISC_SYNC_FM1         0x06
#define RISC_SYNC_VRO         0x0C

#define RISC_FLUSH()          bt->risc_pos = 0
#define RISC_INSTR(instr)     bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)

static int bt878_make_risc(struct bt878 *bt)
{
      bt->block_bytes = bt->buf_size >> 4;
      bt->block_count = 1 << 4;
      bt->line_bytes = bt->block_bytes;
      bt->line_count = bt->block_count;

      while (bt->line_bytes > 4095) {
            bt->line_bytes >>= 1;
            bt->line_count <<= 1;
      }

      if (bt->line_count > 255) {
            printk("bt878: buffer size error!\n");
            return -EINVAL;
      }
      return 0;
}


static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
{
      u32 buf_pos = 0;
      u32 line;

      RISC_FLUSH();
      RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
      RISC_INSTR(0);

      dprintk("bt878: risc len lines %u, bytes per line %u\n",
                  bt->line_count, bt->line_bytes);
      for (line = 0; line < bt->line_count; line++) {
            // At the beginning of every block we issue an IRQ with previous (finished) block number set
            if (!(buf_pos % bt->block_bytes))
                  RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
                           RISC_IRQ |
                           RISC_STATUS(((buf_pos /
                                     bt->block_bytes) +
                                    (bt->block_count -
                                     1)) %
                                     bt->block_count) | bt->
                           line_bytes);
            else
                  RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
                           bt->line_bytes);
            RISC_INSTR(bt->buf_dma + buf_pos);
            buf_pos += bt->line_bytes;
      }

      RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
      RISC_INSTR(0);

      RISC_INSTR(RISC_JUMP);
      RISC_INSTR(bt->risc_dma);

      btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
}

/*****************************/
/* Start/Stop grabbing funcs */
/*****************************/

void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
            u32 irq_err_ignore)
{
      u32 int_mask;

      dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
      /* complete the writing of the risc dma program now we have
       * the card specifics
       */
      bt878_risc_program(bt, op_sync_orin);
      controlreg &= ~0x1f;
      controlreg |= 0x1b;

      btwrite(bt->risc_dma, BT878_ARISC_START);

      /* original int mask had :
       *    6    2    8    4    0
       * 1111 1111 1000 0000 0000
       * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
       * Hacked for DST to:
       * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
       */
      int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
            BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
            BT878_AFBUS | BT878_ARISCI;


      /* ignore pesky bits */
      int_mask &= ~irq_err_ignore;

      btwrite(int_mask, BT878_AINT_MASK);
      btwrite(controlreg, BT878_AGPIO_DMA_CTL);
}

void bt878_stop(struct bt878 *bt)
{
      u32 stat;
      int i = 0;

      dprintk("bt878 debug: bt878_stop\n");

      btwrite(0, BT878_AINT_MASK);
      btand(~0x13, BT878_AGPIO_DMA_CTL);

      do {
            stat = btread(BT878_AINT_STAT);
            if (!(stat & BT878_ARISC_EN))
                  break;
            i++;
      } while (i < 500);

      dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
            bt->nr, i, stat);
}

EXPORT_SYMBOL(bt878_start);
EXPORT_SYMBOL(bt878_stop);

/*****************************/
/* Interrupt service routine */
/*****************************/

static irqreturn_t bt878_irq(int irq, void *dev_id)
{
      u32 stat, astat, mask;
      int count;
      struct bt878 *bt;

      bt = (struct bt878 *) dev_id;

      count = 0;
      while (1) {
            stat = btread(BT878_AINT_STAT);
            mask = btread(BT878_AINT_MASK);
            if (!(astat = (stat & mask)))
                  return IRQ_NONE;  /* this interrupt is not for me */
/*          dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
            btwrite(astat, BT878_AINT_STAT);    /* try to clear interrupt condition */


            if (astat & (BT878_ASCERR | BT878_AOCERR)) {
                  if (bt878_verbose) {
                        printk("bt878(%d): irq%s%s risc_pc=%08x\n",
                               bt->nr,
                               (astat & BT878_ASCERR) ? " SCERR" :
                               "",
                               (astat & BT878_AOCERR) ? " OCERR" :
                               "", btread(BT878_ARISC_PC));
                  }
            }
            if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
                  if (bt878_verbose) {
                        printk
                            ("bt878(%d): irq%s%s%s risc_pc=%08x\n",
                             bt->nr,
                             (astat & BT878_APABORT) ? " PABORT" :
                             "",
                             (astat & BT878_ARIPERR) ? " RIPERR" :
                             "",
                             (astat & BT878_APPERR) ? " PPERR" :
                             "", btread(BT878_ARISC_PC));
                  }
            }
            if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
                  if (bt878_verbose) {
                        printk
                            ("bt878(%d): irq%s%s%s risc_pc=%08x\n",
                             bt->nr,
                             (astat & BT878_AFDSR) ? " FDSR" : "",
                             (astat & BT878_AFTRGT) ? " FTRGT" :
                             "",
                             (astat & BT878_AFBUS) ? " FBUS" : "",
                             btread(BT878_ARISC_PC));
                  }
            }
            if (astat & BT878_ARISCI) {
                  bt->finished_block = (stat & BT878_ARISCS) >> 28;
                  tasklet_schedule(&bt->tasklet);
                  break;
            }
            count++;
            if (count > 20) {
                  btwrite(0, BT878_AINT_MASK);
                  printk(KERN_ERR
                         "bt878(%d): IRQ lockup, cleared int mask\n",
                         bt->nr);
                  break;
            }
      }
      return IRQ_HANDLED;
}

int
bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
{
      int retval;

      retval = 0;
      if (mutex_lock_interruptible(&bt->gpio_lock))
            return -ERESTARTSYS;
      /* special gpio signal */
      switch (cmd) {
          case DST_IG_ENABLE:
            // dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
            retval = bttv_gpio_enable(bt->bttv_nr,
                        mp->enb.mask,
                        mp->enb.enable);
            break;
          case DST_IG_WRITE:
            // dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
            retval = bttv_write_gpio(bt->bttv_nr,
                        mp->outp.mask,
                        mp->outp.highvals);

            break;
          case DST_IG_READ:
            /* read */
            retval =  bttv_read_gpio(bt->bttv_nr, &mp->rd.value);
            // dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
            break;
          case DST_IG_TS:
            /* Set packet size */
            bt->TS_Size = mp->psize;
            break;

          default:
            retval = -EINVAL;
            break;
      }
      mutex_unlock(&bt->gpio_lock);
      return retval;
}

EXPORT_SYMBOL(bt878_device_control);


static struct cards card_list[] __devinitdata = {

      { 0x01010071, BTTV_BOARD_NEBULA_DIGITV,               "Nebula Electronics DigiTV" },
      { 0x07611461, BTTV_BOARD_AVDVBT_761,                  "AverMedia AverTV DVB-T 761" },
      { 0x001c11bd, BTTV_BOARD_PINNACLESAT,                 "Pinnacle PCTV Sat" },
      { 0x002611bd, BTTV_BOARD_TWINHAN_DST,                 "Pinnacle PCTV SAT CI" },
      { 0x00011822, BTTV_BOARD_TWINHAN_DST,                 "Twinhan VisionPlus DVB" },
      { 0xfc00270f, BTTV_BOARD_TWINHAN_DST,                 "ChainTech digitop DST-1000 DVB-S" },
      { 0x07711461, BTTV_BOARD_AVDVBT_771,                  "AVermedia AverTV DVB-T 771" },
      { 0xdb1018ac, BTTV_BOARD_DVICO_DVBT_LITE,       "DViCO FusionHDTV DVB-T Lite" },
      { 0xdb1118ac, BTTV_BOARD_DVICO_DVBT_LITE,       "Ultraview DVB-T Lite" },
      { 0xd50018ac, BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE,     "DViCO FusionHDTV 5 Lite" },
      { 0x20007063, BTTV_BOARD_PC_HDTV,               "pcHDTV HD-2000 TV" },
      { 0x00261822, BTTV_BOARD_TWINHAN_DST,                 "DNTV Live! Mini" }
};


/***********************/
/* PCI device handling */
/***********************/

static int __devinit bt878_probe(struct pci_dev *dev,
                         const struct pci_device_id *pci_id)
{
      int result = 0, has_dvb = 0, i;
      unsigned char lat;
      struct bt878 *bt;
#if defined(__powerpc__)
      unsigned int cmd;
#endif
      unsigned int cardid;
      unsigned short id;
      struct cards *dvb_cards;

      printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
             bt878_num);
      if (bt878_num >= BT878_MAX) {
            printk(KERN_ERR "bt878: Too many devices inserted\n");
            result = -ENOMEM;
            goto fail0;
      }
      if (pci_enable_device(dev))
            return -EIO;

      pci_read_config_word(dev, PCI_SUBSYSTEM_ID, &id);
      cardid = id << 16;
      pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, &id);
      cardid |= id;

      for (i = 0, dvb_cards = card_list; i < ARRAY_SIZE(card_list); i++, dvb_cards++) {
            if (cardid == dvb_cards->pci_id) {
                  printk("%s: card id=[0x%x],[ %s ] has DVB functions.\n",
                        __func__, cardid, dvb_cards->name);
                  has_dvb = 1;
            }
      }

      if (!has_dvb) {
            printk("%s: card id=[0x%x], Unknown card.\nExiting..\n", __func__, cardid);
            result = -EINVAL;

            goto fail0;
      }

      bt = &bt878[bt878_num];
      bt->dev = dev;
      bt->nr = bt878_num;
      bt->shutdown = 0;

      bt->id = dev->device;
      bt->irq = dev->irq;
      bt->bt878_adr = pci_resource_start(dev, 0);
      if (!request_mem_region(pci_resource_start(dev, 0),
                        pci_resource_len(dev, 0), "bt878")) {
            result = -EBUSY;
            goto fail0;
      }

      pci_read_config_byte(dev, PCI_CLASS_REVISION, &bt->revision);
      pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);


      printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
             bt878_num, bt->id, bt->revision, dev->bus->number,
             PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
      printk("irq: %d, latency: %d, memory: 0x%lx\n",
             bt->irq, lat, bt->bt878_adr);


#if defined(__powerpc__)
      /* on OpenFirmware machines (PowerMac at least), PCI memory cycle */
      /* response on cards with no firmware is not enabled by OF */
      pci_read_config_dword(dev, PCI_COMMAND, &cmd);
      cmd = (cmd | PCI_COMMAND_MEMORY);
      pci_write_config_dword(dev, PCI_COMMAND, cmd);
#endif

#ifdef __sparc__
      bt->bt878_mem = (unsigned char *) bt->bt878_adr;
#else
      bt->bt878_mem = ioremap(bt->bt878_adr, 0x1000);
#endif

      /* clear interrupt mask */
      btwrite(0, BT848_INT_MASK);

      result = request_irq(bt->irq, bt878_irq,
                       IRQF_SHARED | IRQF_DISABLED, "bt878",
                       (void *) bt);
      if (result == -EINVAL) {
            printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
                   bt878_num);
            goto fail1;
      }
      if (result == -EBUSY) {
            printk(KERN_ERR
                   "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
                   bt878_num, bt->irq);
            goto fail1;
      }
      if (result < 0)
            goto fail1;

      pci_set_master(dev);
      pci_set_drvdata(dev, bt);

/*        if(init_bt878(btv) < 0) {
            bt878_remove(dev);
            return -EIO;
      }
*/

      if ((result = bt878_mem_alloc(bt))) {
            printk("bt878: failed to allocate memory!\n");
            goto fail2;
      }

      bt878_make_risc(bt);
      btwrite(0, BT878_AINT_MASK);
      bt878_num++;

      return 0;

      fail2:
      free_irq(bt->irq, bt);
      fail1:
      release_mem_region(pci_resource_start(bt->dev, 0),
                     pci_resource_len(bt->dev, 0));
      fail0:
      pci_disable_device(dev);
      return result;
}

static void __devexit bt878_remove(struct pci_dev *pci_dev)
{
      u8 command;
      struct bt878 *bt = pci_get_drvdata(pci_dev);

      if (bt878_verbose)
            printk("bt878(%d): unloading\n", bt->nr);

      /* turn off all capturing, DMA and IRQs */
      btand(~0x13, BT878_AGPIO_DMA_CTL);

      /* first disable interrupts before unmapping the memory! */
      btwrite(0, BT878_AINT_MASK);
      btwrite(~0U, BT878_AINT_STAT);

      /* disable PCI bus-mastering */
      pci_read_config_byte(bt->dev, PCI_COMMAND, &command);
      /* Should this be &=~ ?? */
      command &= ~PCI_COMMAND_MASTER;
      pci_write_config_byte(bt->dev, PCI_COMMAND, command);

      free_irq(bt->irq, bt);
      printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
      if (bt->bt878_mem)
            iounmap(bt->bt878_mem);

      release_mem_region(pci_resource_start(bt->dev, 0),
                     pci_resource_len(bt->dev, 0));
      /* wake up any waiting processes
         because shutdown flag is set, no new processes (in this queue)
         are expected
       */
      bt->shutdown = 1;
      bt878_mem_free(bt);

      pci_set_drvdata(pci_dev, NULL);
      pci_disable_device(pci_dev);
      return;
}

static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
      {PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BROOKTREE_878,
       PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
      {0,}
};

MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);

static struct pci_driver bt878_pci_driver = {
      .name = "bt878",
      .id_table = bt878_pci_tbl,
      .probe      = bt878_probe,
      .remove     = bt878_remove,
};

static int bt878_pci_driver_registered;

/*******************************/
/* Module management functions */
/*******************************/

static int bt878_init_module(void)
{
      bt878_num = 0;
      bt878_pci_driver_registered = 0;

      printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
             (BT878_VERSION_CODE >> 16) & 0xff,
             (BT878_VERSION_CODE >> 8) & 0xff,
             BT878_VERSION_CODE & 0xff);
/*
      bt878_check_chipset();
*/
      /* later we register inside of bt878_find_audio_dma()
       * because we may want to ignore certain cards */
      bt878_pci_driver_registered = 1;
      return pci_register_driver(&bt878_pci_driver);
}

static void bt878_cleanup_module(void)
{
      if (bt878_pci_driver_registered) {
            bt878_pci_driver_registered = 0;
            pci_unregister_driver(&bt878_pci_driver);
      }
      return;
}

module_init(bt878_init_module);
module_exit(bt878_cleanup_module);

//MODULE_AUTHOR("XXX");
MODULE_LICENSE("GPL");

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

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