Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy...

[mirror_ubuntu-bionic-kernel.git] / drivers / media / video / cx88 / cx88-mpeg.c

/*
 *
 *  Support for the mpeg transport stream transfers
 *  PCI function #2 of the cx2388x.
 *
 *    (c) 2004 Jelle Foks <jelle@foks.8m.com>
 *    (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
 *    (c) 2004 Gerd Knorr <kraxel@bytesex.org>
 *
 *  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/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <asm/delay.h>

#include "cx88.h"

/* ------------------------------------------------------------------ */

MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
MODULE_AUTHOR("Jelle Foks <jelle@foks.8m.com>");
MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");

static unsigned int debug = 0;
module_param(debug,int,0644);
MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");

#define dprintk(level,fmt, arg...)      if (debug >= level) \
        printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg)

#define mpeg_dbg(level,fmt, arg...)     if (debug >= level) \
        printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg)

#if defined(CONFIG_MODULES) && defined(MODULE)
static void request_module_async(struct work_struct *work)
{
        struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);

        if (dev->core->board.mpeg & CX88_MPEG_DVB)
                request_module("cx88-dvb");
        if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
                request_module("cx88-blackbird");
}

static void request_modules(struct cx8802_dev *dev)
{
        INIT_WORK(&dev->request_module_wk, request_module_async);
        schedule_work(&dev->request_module_wk);
}
#else
#define request_modules(dev)
#endif /* CONFIG_MODULES */


static LIST_HEAD(cx8802_devlist);
/* ------------------------------------------------------------------ */

static int cx8802_start_dma(struct cx8802_dev    *dev,
                            struct cx88_dmaqueue *q,
                            struct cx88_buffer   *buf)
{
        struct cx88_core *core = dev->core;

        dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n",
                buf->vb.width, buf->vb.height, buf->vb.field);

        /* setup fifo + format */
        cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
                                dev->ts_packet_size, buf->risc.dma);

        /* write TS length to chip */
        cx_write(MO_TS_LNGTH, buf->vb.width);

        /* FIXME: this needs a review.
         * also: move to cx88-blackbird + cx88-dvb source files? */

        dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);

        if ( (core->active_type_id == CX88_MPEG_DVB) &&
                (core->board.mpeg & CX88_MPEG_DVB) ) {

                dprintk( 1, "cx8802_start_dma doing .dvb\n");
                /* negedge driven & software reset */
                cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
                udelay(100);
                cx_write(MO_PINMUX_IO, 0x00);
                cx_write(TS_HW_SOP_CNTRL, 0x47<<16|188<<4|0x01);
                switch (core->boardnr) {
                case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
                case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
                case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
                case CX88_BOARD_PCHDTV_HD5500:
                        cx_write(TS_SOP_STAT, 1<<13);
                        break;
                case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
                case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
                        cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
                        udelay(100);
                        break;
                case CX88_BOARD_HAUPPAUGE_HVR1300:
                        break;
                case CX88_BOARD_PINNACLE_PCTV_HD_800i:
                        /* Enable MPEG parallel IO and video signal pins */
                        cx_write(MO_PINMUX_IO, 0x88);
                        cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
                        dev->ts_gen_cntrl = 5;
                        cx_write(TS_SOP_STAT, 0);
                        cx_write(TS_VALERR_CNTRL, 0);
                        udelay(100);
                        break;
                default:
                        cx_write(TS_SOP_STAT, 0x00);
                        break;
                }
                cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
                udelay(100);
        } else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
                (core->board.mpeg & CX88_MPEG_BLACKBIRD) ) {
                dprintk( 1, "cx8802_start_dma doing .blackbird\n");
                cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */

                cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
                udelay(100);

                cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
                cx_write(TS_VALERR_CNTRL, 0x2000);

                cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
                udelay(100);
        } else {
                printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __FUNCTION__,
                        core->board.mpeg );
                return -EINVAL;
        }

        /* reset counter */
        cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
        q->count = 1;

        /* enable irqs */
        dprintk( 1, "setting the interrupt mask\n" );
        cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
        cx_set(MO_TS_INTMSK,  0x1f0011);

        /* start dma */
        cx_set(MO_DEV_CNTRL2, (1<<5));
        cx_set(MO_TS_DMACNTRL, 0x11);
        return 0;
}

static int cx8802_stop_dma(struct cx8802_dev *dev)
{
        struct cx88_core *core = dev->core;
        dprintk( 1, "cx8802_stop_dma\n" );

        /* stop dma */
        cx_clear(MO_TS_DMACNTRL, 0x11);

        /* disable irqs */
        cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
        cx_clear(MO_TS_INTMSK, 0x1f0011);

        /* Reset the controller */
        cx_write(TS_GEN_CNTRL, 0xcd);
        return 0;
}

static int cx8802_restart_queue(struct cx8802_dev    *dev,
                                struct cx88_dmaqueue *q)
{
        struct cx88_buffer *buf;

        dprintk( 1, "cx8802_restart_queue\n" );
        if (list_empty(&q->active))
        {
                struct cx88_buffer *prev;
                prev = NULL;

                dprintk(1, "cx8802_restart_queue: queue is empty\n" );

                for (;;) {
                        if (list_empty(&q->queued))
                                return 0;
                        buf = list_entry(q->queued.next, struct cx88_buffer, vb.queue);
                        if (NULL == prev) {
                                list_del(&buf->vb.queue);
                                list_add_tail(&buf->vb.queue,&q->active);
                                cx8802_start_dma(dev, q, buf);
                                buf->vb.state = VIDEOBUF_ACTIVE;
                                buf->count    = q->count++;
                                mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
                                dprintk(1,"[%p/%d] restart_queue - first active\n",
                                        buf,buf->vb.i);

                        } else if (prev->vb.width  == buf->vb.width  &&
                                   prev->vb.height == buf->vb.height &&
                                   prev->fmt       == buf->fmt) {
                                list_del(&buf->vb.queue);
                                list_add_tail(&buf->vb.queue,&q->active);
                                buf->vb.state = VIDEOBUF_ACTIVE;
                                buf->count    = q->count++;
                                prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
                                dprintk(1,"[%p/%d] restart_queue - move to active\n",
                                        buf,buf->vb.i);
                        } else {
                                return 0;
                        }
                        prev = buf;
                }
                return 0;
        }

        buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
        dprintk(2,"restart_queue [%p/%d]: restart dma\n",
                buf, buf->vb.i);
        cx8802_start_dma(dev, q, buf);
        list_for_each_entry(buf, &q->active, vb.queue)
                buf->count = q->count++;
        mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
        return 0;
}

/* ------------------------------------------------------------------ */

int cx8802_buf_prepare(struct videobuf_queue *q, struct cx8802_dev *dev,
                        struct cx88_buffer *buf, enum v4l2_field field)
{
        int size = dev->ts_packet_size * dev->ts_packet_count;
        struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
        int rc;

        dprintk(1, "%s: %p\n", __FUNCTION__, buf);
        if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
                return -EINVAL;

        if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
                buf->vb.width  = dev->ts_packet_size;
                buf->vb.height = dev->ts_packet_count;
                buf->vb.size   = size;
                buf->vb.field  = field /*V4L2_FIELD_TOP*/;

                if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
                        goto fail;
                cx88_risc_databuffer(dev->pci, &buf->risc,
                                     dma->sglist,
                                     buf->vb.width, buf->vb.height, 0);
        }
        buf->vb.state = VIDEOBUF_PREPARED;
        return 0;

 fail:
        cx88_free_buffer(q,buf);
        return rc;
}

void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
{
        struct cx88_buffer    *prev;
        struct cx88_dmaqueue  *cx88q = &dev->mpegq;

        dprintk( 1, "cx8802_buf_queue\n" );
        /* add jump to stopper */
        buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
        buf->risc.jmp[1] = cpu_to_le32(cx88q->stopper.dma);

        if (list_empty(&cx88q->active)) {
                dprintk( 1, "queue is empty - first active\n" );
                list_add_tail(&buf->vb.queue,&cx88q->active);
                cx8802_start_dma(dev, cx88q, buf);
                buf->vb.state = VIDEOBUF_ACTIVE;
                buf->count    = cx88q->count++;
                mod_timer(&cx88q->timeout, jiffies+BUFFER_TIMEOUT);
                dprintk(1,"[%p/%d] %s - first active\n",
                        buf, buf->vb.i, __FUNCTION__);

        } else {
                dprintk( 1, "queue is not empty - append to active\n" );
                prev = list_entry(cx88q->active.prev, struct cx88_buffer, vb.queue);
                list_add_tail(&buf->vb.queue,&cx88q->active);
                buf->vb.state = VIDEOBUF_ACTIVE;
                buf->count    = cx88q->count++;
                prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
                dprintk( 1, "[%p/%d] %s - append to active\n",
                        buf, buf->vb.i, __FUNCTION__);
        }
}

/* ----------------------------------------------------------- */

static void do_cancel_buffers(struct cx8802_dev *dev, char *reason, int restart)
{
        struct cx88_dmaqueue *q = &dev->mpegq;
        struct cx88_buffer *buf;
        unsigned long flags;

        spin_lock_irqsave(&dev->slock,flags);
        while (!list_empty(&q->active)) {
                buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
                list_del(&buf->vb.queue);
                buf->vb.state = VIDEOBUF_ERROR;
                wake_up(&buf->vb.done);
                dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
                        buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
        }
        if (restart)
        {
                dprintk(1, "restarting queue\n" );
                cx8802_restart_queue(dev,q);
        }
        spin_unlock_irqrestore(&dev->slock,flags);
}

void cx8802_cancel_buffers(struct cx8802_dev *dev)
{
        struct cx88_dmaqueue *q = &dev->mpegq;

        dprintk( 1, "cx8802_cancel_buffers" );
        del_timer_sync(&q->timeout);
        cx8802_stop_dma(dev);
        do_cancel_buffers(dev,"cancel",0);
}

static void cx8802_timeout(unsigned long data)
{
        struct cx8802_dev *dev = (struct cx8802_dev*)data;

        dprintk(1, "%s\n",__FUNCTION__);

        if (debug)
                cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
        cx8802_stop_dma(dev);
        do_cancel_buffers(dev,"timeout",1);
}

static char *cx88_mpeg_irqs[32] = {
        "ts_risci1", NULL, NULL, NULL,
        "ts_risci2", NULL, NULL, NULL,
        "ts_oflow",  NULL, NULL, NULL,
        "ts_sync",   NULL, NULL, NULL,
        "opc_err", "par_err", "rip_err", "pci_abort",
        "ts_err?",
};

static void cx8802_mpeg_irq(struct cx8802_dev *dev)
{
        struct cx88_core *core = dev->core;
        u32 status, mask, count;

        dprintk( 1, "cx8802_mpeg_irq\n" );
        status = cx_read(MO_TS_INTSTAT);
        mask   = cx_read(MO_TS_INTMSK);
        if (0 == (status & mask))
                return;

        cx_write(MO_TS_INTSTAT, status);

        if (debug || (status & mask & ~0xff))
                cx88_print_irqbits(core->name, "irq mpeg ",
                                   cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
                                   status, mask);

        /* risc op code error */
        if (status & (1 << 16)) {
                printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
                cx_clear(MO_TS_DMACNTRL, 0x11);
                cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
        }

        /* risc1 y */
        if (status & 0x01) {
                dprintk( 1, "wake up\n" );
                spin_lock(&dev->slock);
                count = cx_read(MO_TS_GPCNT);
                cx88_wakeup(dev->core, &dev->mpegq, count);
                spin_unlock(&dev->slock);
        }

        /* risc2 y */
        if (status & 0x10) {
                spin_lock(&dev->slock);
                cx8802_restart_queue(dev,&dev->mpegq);
                spin_unlock(&dev->slock);
        }

        /* other general errors */
        if (status & 0x1f0100) {
                dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
                spin_lock(&dev->slock);
                cx8802_stop_dma(dev);
                cx8802_restart_queue(dev,&dev->mpegq);
                spin_unlock(&dev->slock);
        }
}

#define MAX_IRQ_LOOP 10

static irqreturn_t cx8802_irq(int irq, void *dev_id)
{
        struct cx8802_dev *dev = dev_id;
        struct cx88_core *core = dev->core;
        u32 status;
        int loop, handled = 0;

        for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
                status = cx_read(MO_PCI_INTSTAT) &
                        (core->pci_irqmask | PCI_INT_TSINT);
                if (0 == status)
                        goto out;
                dprintk( 1, "cx8802_irq\n" );
                dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
                dprintk( 1, "    status: %d\n", status );
                handled = 1;
                cx_write(MO_PCI_INTSTAT, status);

                if (status & core->pci_irqmask)
                        cx88_core_irq(core,status);
                if (status & PCI_INT_TSINT)
                        cx8802_mpeg_irq(dev);
        };
        if (MAX_IRQ_LOOP == loop) {
                dprintk( 0, "clearing mask\n" );
                printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
                       core->name);
                cx_write(MO_PCI_INTMSK,0);
        }

 out:
        return IRQ_RETVAL(handled);
}

static int cx8802_init_common(struct cx8802_dev *dev)
{
        struct cx88_core *core = dev->core;
        int err;

        /* pci init */
        if (pci_enable_device(dev->pci))
                return -EIO;
        pci_set_master(dev->pci);
        if (!pci_dma_supported(dev->pci,DMA_32BIT_MASK)) {
                printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
                return -EIO;
        }

        pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
        pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
        printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
               "latency: %d, mmio: 0x%llx\n", dev->core->name,
               pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
               dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));

        /* initialize driver struct */
        spin_lock_init(&dev->slock);

        /* init dma queue */
        INIT_LIST_HEAD(&dev->mpegq.active);
        INIT_LIST_HEAD(&dev->mpegq.queued);
        dev->mpegq.timeout.function = cx8802_timeout;
        dev->mpegq.timeout.data     = (unsigned long)dev;
        init_timer(&dev->mpegq.timeout);
        cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
                          MO_TS_DMACNTRL,0x11,0x00);

        /* get irq */
        err = request_irq(dev->pci->irq, cx8802_irq,
                          IRQF_SHARED | IRQF_DISABLED, dev->core->name, dev);
        if (err < 0) {
                printk(KERN_ERR "%s: can't get IRQ %d\n",
                       dev->core->name, dev->pci->irq);
                return err;
        }
        cx_set(MO_PCI_INTMSK, core->pci_irqmask);

        /* everything worked */
        pci_set_drvdata(dev->pci,dev);
        return 0;
}

static void cx8802_fini_common(struct cx8802_dev *dev)
{
        dprintk( 2, "cx8802_fini_common\n" );
        cx8802_stop_dma(dev);
        pci_disable_device(dev->pci);

        /* unregister stuff */
        free_irq(dev->pci->irq, dev);
        pci_set_drvdata(dev->pci, NULL);

        /* free memory */
        btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
}

/* ----------------------------------------------------------- */

static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
{
        struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
        struct cx88_core *core = dev->core;

        /* stop mpeg dma */
        spin_lock(&dev->slock);
        if (!list_empty(&dev->mpegq.active)) {
                dprintk( 2, "suspend\n" );
                printk("%s: suspend mpeg\n", core->name);
                cx8802_stop_dma(dev);
                del_timer(&dev->mpegq.timeout);
        }
        spin_unlock(&dev->slock);

        /* FIXME -- shutdown device */
        cx88_shutdown(dev->core);

        pci_save_state(pci_dev);
        if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
                pci_disable_device(pci_dev);
                dev->state.disabled = 1;
        }
        return 0;
}

static int cx8802_resume_common(struct pci_dev *pci_dev)
{
        struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
        struct cx88_core *core = dev->core;
        int err;

        if (dev->state.disabled) {
                err=pci_enable_device(pci_dev);
                if (err) {
                        printk(KERN_ERR "%s: can't enable device\n",
                                               dev->core->name);
                        return err;
                }
                dev->state.disabled = 0;
        }
        err=pci_set_power_state(pci_dev, PCI_D0);
        if (err) {
                printk(KERN_ERR "%s: can't enable device\n",
                                               dev->core->name);
                pci_disable_device(pci_dev);
                dev->state.disabled = 1;

                return err;
        }
        pci_restore_state(pci_dev);

        /* FIXME: re-initialize hardware */
        cx88_reset(dev->core);

        /* restart video+vbi capture */
        spin_lock(&dev->slock);
        if (!list_empty(&dev->mpegq.active)) {
                printk("%s: resume mpeg\n", core->name);
                cx8802_restart_queue(dev,&dev->mpegq);
        }
        spin_unlock(&dev->slock);

        return 0;
}

#if defined(CONFIG_VIDEO_CX88_BLACKBIRD) || \
    defined(CONFIG_VIDEO_CX88_BLACKBIRD_MODULE)
struct cx8802_dev * cx8802_get_device(struct inode *inode)
{
        int minor = iminor(inode);
        struct cx8802_dev *dev;

        list_for_each_entry(dev, &cx8802_devlist, devlist)
                if (dev->mpeg_dev && dev->mpeg_dev->minor == minor)
                        return dev;

        return NULL;
}
EXPORT_SYMBOL(cx8802_get_device);
#endif

struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
{
        struct cx8802_driver *d;

        list_for_each_entry(d, &dev->drvlist, drvlist)
                if (d->type_id == btype)
                        return d;

        return NULL;
}

/* Driver asked for hardware access. */
static int cx8802_request_acquire(struct cx8802_driver *drv)
{
        struct cx88_core *core = drv->core;

        /* Fail a request for hardware if the device is busy. */
        if (core->active_type_id != CX88_BOARD_NONE)
                return -EBUSY;

        if (drv->advise_acquire)
        {
                core->active_type_id = drv->type_id;
                drv->advise_acquire(drv);

                mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __FUNCTION__, cx_read(MO_GP0_IO));
        }

        return 0;
}

/* Driver asked to release hardware. */
static int cx8802_request_release(struct cx8802_driver *drv)
{
        struct cx88_core *core = drv->core;

        if (drv->advise_release)
        {
                drv->advise_release(drv);
                core->active_type_id = CX88_BOARD_NONE;
                mpeg_dbg(1,"%s() Post release GPIO=%x\n", __FUNCTION__, cx_read(MO_GP0_IO));
        }

        return 0;
}

static int cx8802_check_driver(struct cx8802_driver *drv)
{
        if (drv == NULL)
                return -ENODEV;

        if ((drv->type_id != CX88_MPEG_DVB) &&
                (drv->type_id != CX88_MPEG_BLACKBIRD))
                return -EINVAL;

        if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
                (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
                return -EINVAL;

        if ((drv->probe == NULL) ||
                (drv->remove == NULL) ||
                (drv->advise_acquire == NULL) ||
                (drv->advise_release == NULL))
                return -EINVAL;

        return 0;
}

int cx8802_register_driver(struct cx8802_driver *drv)
{
        struct cx8802_dev *dev;
        struct cx8802_driver *driver;
        int err, i = 0;

        printk(KERN_INFO
               "cx88/2: registering cx8802 driver, type: %s access: %s\n",
               drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
               drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

        if ((err = cx8802_check_driver(drv)) != 0) {
                printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
                return err;
        }

        list_for_each_entry(dev, &cx8802_devlist, devlist) {
                printk(KERN_INFO
                       "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
                       dev->core->name, dev->pci->subsystem_vendor,
                       dev->pci->subsystem_device, dev->core->board.name,
                       dev->core->boardnr);

                /* Bring up a new struct for each driver instance */
                driver = kzalloc(sizeof(*drv),GFP_KERNEL);
                if (driver == NULL)
                        return -ENOMEM;

                /* Snapshot of the driver registration data */
                drv->core = dev->core;
                drv->suspend = cx8802_suspend_common;
                drv->resume = cx8802_resume_common;
                drv->request_acquire = cx8802_request_acquire;
                drv->request_release = cx8802_request_release;
                memcpy(driver, drv, sizeof(*driver));

                err = drv->probe(driver);
                if (err == 0) {
                        i++;
                        mutex_lock(&drv->core->lock);
                        list_add_tail(&driver->drvlist, &dev->drvlist);
                        mutex_unlock(&drv->core->lock);
                } else {
                        printk(KERN_ERR
                               "%s/2: cx8802 probe failed, err = %d\n",
                               dev->core->name, err);
                }

        }

        return i ? 0 : -ENODEV;
}

int cx8802_unregister_driver(struct cx8802_driver *drv)
{
        struct cx8802_dev *dev;
        struct cx8802_driver *d, *dtmp;
        int err = 0;

        printk(KERN_INFO
               "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
               drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
               drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

        list_for_each_entry(dev, &cx8802_devlist, devlist) {
                printk(KERN_INFO
                       "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
                       dev->core->name, dev->pci->subsystem_vendor,
                       dev->pci->subsystem_device, dev->core->board.name,
                       dev->core->boardnr);

                list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
                        /* only unregister the correct driver type */
                        if (d->type_id != drv->type_id)
                                continue;

                        err = d->remove(d);
                        if (err == 0) {
                                mutex_lock(&drv->core->lock);
                                list_del(&d->drvlist);
                                mutex_unlock(&drv->core->lock);
                                kfree(d);
                        } else
                                printk(KERN_ERR "%s/2: cx8802 driver remove "
                                       "failed (%d)\n", dev->core->name, err);
                }

        }

        return err;
}

/* ----------------------------------------------------------- */
static int __devinit cx8802_probe(struct pci_dev *pci_dev,
                               const struct pci_device_id *pci_id)
{
        struct cx8802_dev *dev;
        struct cx88_core  *core;
        int err;

        /* general setup */
        core = cx88_core_get(pci_dev);
        if (NULL == core)
                return -EINVAL;

        printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);

        err = -ENODEV;
        if (!core->board.mpeg)
                goto fail_core;

        err = -ENOMEM;
        dev = kzalloc(sizeof(*dev),GFP_KERNEL);
        if (NULL == dev)
                goto fail_core;
        dev->pci = pci_dev;
        dev->core = core;

        err = cx8802_init_common(dev);
        if (err != 0)
                goto fail_free;

        INIT_LIST_HEAD(&dev->drvlist);
        list_add_tail(&dev->devlist,&cx8802_devlist);

        /* Maintain a reference so cx88-video can query the 8802 device. */
        core->dvbdev = dev;

        /* now autoload cx88-dvb or cx88-blackbird */
        request_modules(dev);
        return 0;

 fail_free:
        kfree(dev);
 fail_core:
        cx88_core_put(core,pci_dev);
        return err;
}

static void __devexit cx8802_remove(struct pci_dev *pci_dev)
{
        struct cx8802_dev *dev;

        dev = pci_get_drvdata(pci_dev);

        dprintk( 1, "%s\n", __FUNCTION__);

        if (!list_empty(&dev->drvlist)) {
                struct cx8802_driver *drv, *tmp;
                int err;

                printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
                       "while cx8802 sub-drivers still loaded?!\n",
                       dev->core->name);

                list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
                        err = drv->remove(drv);
                        if (err == 0) {
                                mutex_lock(&drv->core->lock);
                                list_del(&drv->drvlist);
                                mutex_unlock(&drv->core->lock);
                        } else
                                printk(KERN_ERR "%s/2: cx8802 driver remove "
                                       "failed (%d)\n", dev->core->name, err);
                        kfree(drv);
                }
        }

        /* Destroy any 8802 reference. */
        dev->core->dvbdev = NULL;

        /* common */
        cx8802_fini_common(dev);
        cx88_core_put(dev->core,dev->pci);
        kfree(dev);
}

static struct pci_device_id cx8802_pci_tbl[] = {
        {
                .vendor       = 0x14f1,
                .device       = 0x8802,
                .subvendor    = PCI_ANY_ID,
                .subdevice    = PCI_ANY_ID,
        },{
                /* --- end of list --- */
        }
};
MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);

static struct pci_driver cx8802_pci_driver = {
        .name     = "cx88-mpeg driver manager",
        .id_table = cx8802_pci_tbl,
        .probe    = cx8802_probe,
        .remove   = __devexit_p(cx8802_remove),
};

static int cx8802_init(void)
{
        printk(KERN_INFO "cx88/2: cx2388x MPEG-TS Driver Manager version %d.%d.%d loaded\n",
               (CX88_VERSION_CODE >> 16) & 0xff,
               (CX88_VERSION_CODE >>  8) & 0xff,
               CX88_VERSION_CODE & 0xff);
#ifdef SNAPSHOT
        printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
               SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
#endif
        return pci_register_driver(&cx8802_pci_driver);
}

static void cx8802_fini(void)
{
        pci_unregister_driver(&cx8802_pci_driver);
}

module_init(cx8802_init);
module_exit(cx8802_fini);
EXPORT_SYMBOL(cx8802_buf_prepare);
EXPORT_SYMBOL(cx8802_buf_queue);
EXPORT_SYMBOL(cx8802_cancel_buffers);

EXPORT_SYMBOL(cx8802_register_driver);
EXPORT_SYMBOL(cx8802_unregister_driver);
EXPORT_SYMBOL(cx8802_get_driver);
/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 * kate: eol "unix"; indent-width 3; remove-trailing-space on; replace-trailing-space-save on; tab-width 8; replace-tabs off; space-indent off; mixed-indent off
 */