// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * device driver for philips saa7134 based TV cards
 * driver core
 *
 * (c) 2001-03 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 */

#include "saa7134.h"
#include "saa7134-reg.h"

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/kmod.h>
#include <linux/sound.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/dma-mapping.h>
#include <linux/pm.h>

MODULE_DESCRIPTION("v4l2 driver module for saa7130/34 based TV cards");
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");
MODULE_VERSION(SAA7134_VERSION);


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

static unsigned int irq_debug;
module_param(irq_debug, int, 0644);
MODULE_PARM_DESC(irq_debug,"enable debug messages [IRQ handler]");

static unsigned int core_debug;
module_param(core_debug, int, 0644);
MODULE_PARM_DESC(core_debug,"enable debug messages [core]");

static unsigned int gpio_tracking;
module_param(gpio_tracking, int, 0644);
MODULE_PARM_DESC(gpio_tracking,"enable debug messages [gpio]");

static unsigned int alsa = 1;
module_param(alsa, int, 0644);
MODULE_PARM_DESC(alsa,"enable/disable ALSA DMA sound [dmasound]");

static unsigned int latency = UNSET;
module_param(latency, int, 0444);
MODULE_PARM_DESC(latency,"pci latency timer");

bool saa7134_userptr;
module_param(saa7134_userptr, bool, 0644);
MODULE_PARM_DESC(saa7134_userptr, "enable page-aligned userptr support");

static unsigned int video_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
static unsigned int vbi_nr[]   = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
static unsigned int radio_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
static unsigned int tuner[]    = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
static unsigned int card[]     = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };


module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr,   int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);
module_param_array(tuner,    int, NULL, 0444);
module_param_array(card,     int, NULL, 0444);

MODULE_PARM_DESC(video_nr, "video device number");
MODULE_PARM_DESC(vbi_nr,   "vbi device number");
MODULE_PARM_DESC(radio_nr, "radio device number");
MODULE_PARM_DESC(tuner,    "tuner type");
MODULE_PARM_DESC(card,     "card type");

DEFINE_MUTEX(saa7134_devlist_lock);
EXPORT_SYMBOL(saa7134_devlist_lock);
LIST_HEAD(saa7134_devlist);
EXPORT_SYMBOL(saa7134_devlist);
static LIST_HEAD(mops_list);
static unsigned int saa7134_devcount;

int (*saa7134_dmasound_init)(struct saa7134_dev *dev);
int (*saa7134_dmasound_exit)(struct saa7134_dev *dev);

#define core_dbg(fmt, arg...) do { \
        if (core_debug) \
                printk(KERN_DEBUG pr_fmt("core: " fmt), ## arg); \
        } while (0)

#define irq_dbg(level, fmt, arg...)  do {\
        if (irq_debug > level) \
                printk(KERN_DEBUG pr_fmt("irq: " fmt), ## arg); \
        } while (0)

void saa7134_track_gpio(struct saa7134_dev *dev, const char *msg)
{
        unsigned long mode,status;

        if (!gpio_tracking)
                return;
        /* rising SAA7134_GPIO_GPRESCAN reads the status */
        saa_andorb(SAA7134_GPIO_GPMODE3,SAA7134_GPIO_GPRESCAN,0);
        saa_andorb(SAA7134_GPIO_GPMODE3,SAA7134_GPIO_GPRESCAN,SAA7134_GPIO_GPRESCAN);
        mode   = saa_readl(SAA7134_GPIO_GPMODE0   >> 2) & 0xfffffff;
        status = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2) & 0xfffffff;
        core_dbg("%s: gpio: mode=0x%07lx in=0x%07lx out=0x%07lx [%s]\n",
               dev->name, mode, (~mode) & status, mode & status, msg);
}

void saa7134_set_gpio(struct saa7134_dev *dev, int bit_no, int value)
{
        u32 index, bitval;

        index = 1 << bit_no;
        switch (value) {
        case 0: /* static value */
        case 1:
                core_dbg("setting GPIO%d to static %d\n", bit_no, value);
                /* turn sync mode off if necessary */
                if (index & 0x00c00000)
                        saa_andorb(SAA7134_VIDEO_PORT_CTRL6, 0x0f, 0x00);
                if (value)
                        bitval = index;
                else
                        bitval = 0;
                saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, index, index);
                saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, index, bitval);
                break;
        case 3: /* tristate */
                core_dbg("setting GPIO%d to tristate\n", bit_no);
                saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, index, 0);
                break;
        }
}

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


/* ----------------------------------------------------------- */
/* delayed request_module                                      */

#if defined(CONFIG_MODULES) && defined(MODULE)

static void request_module_async(struct work_struct *work){
        struct saa7134_dev* dev = container_of(work, struct saa7134_dev, request_module_wk);
        if (card_is_empress(dev))
                request_module("saa7134-empress");
        if (card_is_dvb(dev))
                request_module("saa7134-dvb");
        if (card_is_go7007(dev))
                request_module("saa7134-go7007");
        if (alsa) {
                if (dev->pci->device != PCI_DEVICE_ID_PHILIPS_SAA7130)
                        request_module("saa7134-alsa");
        }
}

static void request_submodules(struct saa7134_dev *dev)
{
        INIT_WORK(&dev->request_module_wk, request_module_async);
        schedule_work(&dev->request_module_wk);
}

static void flush_request_submodules(struct saa7134_dev *dev)
{
        flush_work(&dev->request_module_wk);
}

#else
#define request_submodules(dev)
#define flush_request_submodules(dev)
#endif /* CONFIG_MODULES */

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

/* nr of (saa7134-)pages for the given buffer size */
static int saa7134_buffer_pages(int size)
{
        size  = PAGE_ALIGN(size);
        size += PAGE_SIZE; /* for non-page-aligned buffers */
        size /= 4096;
        return size;
}

/* calc max # of buffers from size (must not exceed the 4MB virtual
 * address space per DMA channel) */
int saa7134_buffer_count(unsigned int size, unsigned int count)
{
        unsigned int maxcount;

        maxcount = 1024 / saa7134_buffer_pages(size);
        if (count > maxcount)
                count = maxcount;
        return count;
}

int saa7134_buffer_startpage(struct saa7134_buf *buf)
{
        return saa7134_buffer_pages(vb2_plane_size(&buf->vb2.vb2_buf, 0))
                        * buf->vb2.vb2_buf.index;
}

unsigned long saa7134_buffer_base(struct saa7134_buf *buf)
{
        unsigned long base;
        struct sg_table *dma = vb2_dma_sg_plane_desc(&buf->vb2.vb2_buf, 0);

        base  = saa7134_buffer_startpage(buf) * 4096;
        base += dma->sgl[0].offset;
        return base;
}

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

int saa7134_pgtable_alloc(struct pci_dev *pci, struct saa7134_pgtable *pt)
{
        __le32       *cpu;
        dma_addr_t   dma_addr = 0;

        cpu = dma_alloc_coherent(&pci->dev, SAA7134_PGTABLE_SIZE, &dma_addr,
                                 GFP_KERNEL);
        if (NULL == cpu)
                return -ENOMEM;
        pt->size = SAA7134_PGTABLE_SIZE;
        pt->cpu  = cpu;
        pt->dma  = dma_addr;
        return 0;
}

int saa7134_pgtable_build(struct pci_dev *pci, struct saa7134_pgtable *pt,
                          struct scatterlist *list, unsigned int length,
                          unsigned int startpage)
{
        __le32        *ptr;
        unsigned int  i, p;

        BUG_ON(NULL == pt || NULL == pt->cpu);

        ptr = pt->cpu + startpage;
        for (i = 0; i < length; i++, list = sg_next(list)) {
                for (p = 0; p * 4096 < sg_dma_len(list); p++, ptr++)
                        *ptr = cpu_to_le32(sg_dma_address(list) +
                                                list->offset + p * 4096);
        }
        return 0;
}

void saa7134_pgtable_free(struct pci_dev *pci, struct saa7134_pgtable *pt)
{
        if (NULL == pt->cpu)
                return;
        dma_free_coherent(&pci->dev, pt->size, pt->cpu, pt->dma);
        pt->cpu = NULL;
}

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

int saa7134_buffer_queue(struct saa7134_dev *dev,
                         struct saa7134_dmaqueue *q,
                         struct saa7134_buf *buf)
{
        struct saa7134_buf *next = NULL;
        unsigned long flags;

        spin_lock_irqsave(&dev->slock, flags);
        core_dbg("buffer_queue %p\n", buf);
        if (NULL == q->curr) {
                if (!q->need_two) {
                        q->curr = buf;
                        buf->activate(dev, buf, NULL);
                } else if (list_empty(&q->queue)) {
                        list_add_tail(&buf->entry, &q->queue);
                } else {
                        next = list_entry(q->queue.next, struct saa7134_buf,
                                          entry);
                        q->curr = buf;
                        buf->activate(dev, buf, next);
                }
        } else {
                list_add_tail(&buf->entry, &q->queue);
        }
        spin_unlock_irqrestore(&dev->slock, flags);
        return 0;
}

void saa7134_buffer_finish(struct saa7134_dev *dev,
                           struct saa7134_dmaqueue *q,
                           unsigned int state)
{
        core_dbg("buffer_finish %p\n", q->curr);

        /* finish current buffer */
        q->curr->vb2.vb2_buf.timestamp = ktime_get_ns();
        q->curr->vb2.sequence = q->seq_nr++;
        vb2_buffer_done(&q->curr->vb2.vb2_buf, state);
        q->curr = NULL;
}

void saa7134_buffer_next(struct saa7134_dev *dev,
                         struct saa7134_dmaqueue *q)
{
        struct saa7134_buf *buf,*next = NULL;

        assert_spin_locked(&dev->slock);
        BUG_ON(NULL != q->curr);

        if (!list_empty(&q->queue)) {
                /* activate next one from queue */
                buf = list_entry(q->queue.next, struct saa7134_buf, entry);
                core_dbg("buffer_next %p [prev=%p/next=%p]\n",
                        buf, q->queue.prev, q->queue.next);
                list_del(&buf->entry);
                if (!list_empty(&q->queue))
                        next = list_entry(q->queue.next, struct saa7134_buf, entry);
                q->curr = buf;
                buf->activate(dev, buf, next);
                core_dbg("buffer_next #2 prev=%p/next=%p\n",
                        q->queue.prev, q->queue.next);
        } else {
                /* nothing to do -- just stop DMA */
                core_dbg("buffer_next %p\n", NULL);
                saa7134_set_dmabits(dev);
                timer_delete(&q->timeout);
        }
}

void saa7134_buffer_timeout(struct timer_list *t)
{
        struct saa7134_dmaqueue *q = timer_container_of(q, t, timeout);
        struct saa7134_dev *dev = q->dev;
        unsigned long flags;

        spin_lock_irqsave(&dev->slock, flags);

        /* try to reset the hardware (SWRST) */
        saa_writeb(SAA7134_REGION_ENABLE, 0x00);
        saa_writeb(SAA7134_REGION_ENABLE, 0x80);
        saa_writeb(SAA7134_REGION_ENABLE, 0x00);

        /* flag current buffer as failed,
           try to start over with the next one. */
        if (q->curr) {
                core_dbg("timeout on %p\n", q->curr);
                saa7134_buffer_finish(dev, q, VB2_BUF_STATE_ERROR);
        }
        saa7134_buffer_next(dev, q);
        spin_unlock_irqrestore(&dev->slock, flags);
}

void saa7134_stop_streaming(struct saa7134_dev *dev, struct saa7134_dmaqueue *q)
{
        unsigned long flags;
        struct list_head *pos, *n;
        struct saa7134_buf *tmp;

        spin_lock_irqsave(&dev->slock, flags);
        list_for_each_safe(pos, n, &q->queue) {
                tmp = list_entry(pos, struct saa7134_buf, entry);
                vb2_buffer_done(&tmp->vb2.vb2_buf,
                                VB2_BUF_STATE_ERROR);
                list_del(pos);
                tmp = NULL;
        }
        spin_unlock_irqrestore(&dev->slock, flags);
        saa7134_buffer_timeout(&q->timeout); /* also calls timer_delete(&q->timeout) */
}
EXPORT_SYMBOL_GPL(saa7134_stop_streaming);

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

int saa7134_set_dmabits(struct saa7134_dev *dev)
{
        u32 split, task=0, ctrl=0, irq=0;
        enum v4l2_field cap = V4L2_FIELD_ANY;
        enum v4l2_field ov  = V4L2_FIELD_ANY;

        assert_spin_locked(&dev->slock);

        if (dev->insuspend)
                return 0;

        /* video capture -- dma 0 + video task A */
        if (dev->video_q.curr) {
                task |= 0x01;
                ctrl |= SAA7134_MAIN_CTRL_TE0;
                irq  |= SAA7134_IRQ1_INTE_RA0_1 |
                        SAA7134_IRQ1_INTE_RA0_0;
                cap = dev->field;
        }

        /* video capture -- dma 1+2 (planar modes) */
        if (dev->video_q.curr && dev->fmt->planar) {
                ctrl |= SAA7134_MAIN_CTRL_TE4 |
                        SAA7134_MAIN_CTRL_TE5;
        }

        /* vbi capture -- dma 0 + vbi task A+B */
        if (dev->vbi_q.curr) {
                task |= 0x22;
                ctrl |= SAA7134_MAIN_CTRL_TE2 |
                        SAA7134_MAIN_CTRL_TE3;
                irq  |= SAA7134_IRQ1_INTE_RA0_7 |
                        SAA7134_IRQ1_INTE_RA0_6 |
                        SAA7134_IRQ1_INTE_RA0_5 |
                        SAA7134_IRQ1_INTE_RA0_4;
        }

        /* audio capture -- dma 3 */
        if (dev->dmasound.dma_running) {
                ctrl |= SAA7134_MAIN_CTRL_TE6;
                irq  |= SAA7134_IRQ1_INTE_RA3_1 |
                        SAA7134_IRQ1_INTE_RA3_0;
        }

        /* TS capture -- dma 5 */
        if (dev->ts_q.curr) {
                ctrl |= SAA7134_MAIN_CTRL_TE5;
                irq  |= SAA7134_IRQ1_INTE_RA2_1 |
                        SAA7134_IRQ1_INTE_RA2_0;
        }

        /* set task conditions + field handling */
        if (V4L2_FIELD_HAS_BOTH(cap) || V4L2_FIELD_HAS_BOTH(ov) || cap == ov) {
                /* default config -- use full frames */
                saa_writeb(SAA7134_TASK_CONDITIONS(TASK_A), 0x0d);
                saa_writeb(SAA7134_TASK_CONDITIONS(TASK_B), 0x0d);
                saa_writeb(SAA7134_FIELD_HANDLING(TASK_A),  0x02);
                saa_writeb(SAA7134_FIELD_HANDLING(TASK_B),  0x02);
                split = 0;
        } else {
                /* split fields between tasks */
                if (V4L2_FIELD_TOP == cap) {
                        /* odd A, even B, repeat */
                        saa_writeb(SAA7134_TASK_CONDITIONS(TASK_A), 0x0d);
                        saa_writeb(SAA7134_TASK_CONDITIONS(TASK_B), 0x0e);
                } else {
                        /* odd B, even A, repeat */
                        saa_writeb(SAA7134_TASK_CONDITIONS(TASK_A), 0x0e);
                        saa_writeb(SAA7134_TASK_CONDITIONS(TASK_B), 0x0d);
                }
                saa_writeb(SAA7134_FIELD_HANDLING(TASK_A),  0x01);
                saa_writeb(SAA7134_FIELD_HANDLING(TASK_B),  0x01);
                split = 1;
        }

        /* irqs */
        saa_writeb(SAA7134_REGION_ENABLE, task);
        saa_writel(SAA7134_IRQ1,          irq);
        saa_andorl(SAA7134_MAIN_CTRL,
                   SAA7134_MAIN_CTRL_TE0 |
                   SAA7134_MAIN_CTRL_TE1 |
                   SAA7134_MAIN_CTRL_TE2 |
                   SAA7134_MAIN_CTRL_TE3 |
                   SAA7134_MAIN_CTRL_TE4 |
                   SAA7134_MAIN_CTRL_TE5 |
                   SAA7134_MAIN_CTRL_TE6,
                   ctrl);
        core_dbg("dmabits: task=0x%02x ctrl=0x%02x irq=0x%x split=%s\n",
                task, ctrl, irq, split ? "no" : "yes");

        return 0;
}

/* ------------------------------------------------------------------ */
/* IRQ handler + helpers                                              */

static char *irqbits[] = {
        "DONE_RA0", "DONE_RA1", "DONE_RA2", "DONE_RA3",
        "AR", "PE", "PWR_ON", "RDCAP", "INTL", "FIDT", "MMC",
        "TRIG_ERR", "CONF_ERR", "LOAD_ERR",
        "GPIO16", "GPIO18", "GPIO22", "GPIO23"
};
#define IRQBITS ARRAY_SIZE(irqbits)

static void print_irqstatus(struct saa7134_dev *dev, int loop,
                            unsigned long report, unsigned long status)
{
        unsigned int i;

        irq_dbg(1, "[%d,%ld]: r=0x%lx s=0x%02lx",
                loop, jiffies, report, status);
        for (i = 0; i < IRQBITS; i++) {
                if (!(report & (1 << i)))
                        continue;
                pr_cont(" %s", irqbits[i]);
        }
        if (report & SAA7134_IRQ_REPORT_DONE_RA0) {
                pr_cont(" | RA0=%s,%s,%s,%ld",
                        (status & 0x40) ? "vbi"  : "video",
                        (status & 0x20) ? "b"    : "a",
                        (status & 0x10) ? "odd"  : "even",
                        (status & 0x0f));
        }
        pr_cont("\n");
}

static irqreturn_t saa7134_irq(int irq, void *dev_id)
{
        struct saa7134_dev *dev = (struct saa7134_dev*) dev_id;
        unsigned long report,status;
        int loop, handled = 0;

        if (dev->insuspend)
                goto out;

        for (loop = 0; loop < 10; loop++) {
                report = saa_readl(SAA7134_IRQ_REPORT);
                status = saa_readl(SAA7134_IRQ_STATUS);

                /* If dmasound support is active and we get a sound report,
                 * mask out the report and let the saa7134-alsa module deal
                 * with it */
                if ((report & SAA7134_IRQ_REPORT_DONE_RA3) &&
                        (dev->dmasound.priv_data != NULL) )
                {
                        irq_dbg(2, "preserving DMA sound interrupt\n");
                        report &= ~SAA7134_IRQ_REPORT_DONE_RA3;
                }

                if (0 == report) {
                        irq_dbg(2, "no (more) work\n");
                        goto out;
                }

                handled = 1;
                saa_writel(SAA7134_IRQ_REPORT,report);
                if (irq_debug)
                        print_irqstatus(dev,loop,report,status);


                if ((report & SAA7134_IRQ_REPORT_RDCAP) ||
                        (report & SAA7134_IRQ_REPORT_INTL))
                                saa7134_irq_video_signalchange(dev);


                if ((report & SAA7134_IRQ_REPORT_DONE_RA0) &&
                    (status & 0x60) == 0)
                        saa7134_irq_video_done(dev,status);

                if ((report & SAA7134_IRQ_REPORT_DONE_RA0) &&
                    (status & 0x40) == 0x40)
                        saa7134_irq_vbi_done(dev,status);

                if ((report & SAA7134_IRQ_REPORT_DONE_RA2) &&
                    card_has_mpeg(dev)) {
                        if (dev->mops->irq_ts_done != NULL)
                                dev->mops->irq_ts_done(dev, status);
                        else
                                saa7134_irq_ts_done(dev, status);
                }

                if (report & SAA7134_IRQ_REPORT_GPIO16) {
                        switch (dev->has_remote) {
                                case SAA7134_REMOTE_GPIO:
                                        if (!dev->remote)
                                                break;
                                        if  (dev->remote->mask_keydown & 0x10000) {
                                                saa7134_input_irq(dev);
                                        }
                                        break;

                                case SAA7134_REMOTE_I2C:
                                        break;                  /* FIXME: invoke I2C get_key() */

                                default:                        /* GPIO16 not used by IR remote */
                                        break;
                        }
                }

                if (report & SAA7134_IRQ_REPORT_GPIO18) {
                        switch (dev->has_remote) {
                                case SAA7134_REMOTE_GPIO:
                                        if (!dev->remote)
                                                break;
                                        if ((dev->remote->mask_keydown & 0x40000) ||
                                            (dev->remote->mask_keyup & 0x40000)) {
                                                saa7134_input_irq(dev);
                                        }
                                        break;

                                case SAA7134_REMOTE_I2C:
                                        break;                  /* FIXME: invoke I2C get_key() */

                                default:                        /* GPIO18 not used by IR remote */
                                        break;
                        }
                }
        }

        if (10 == loop) {
                print_irqstatus(dev,loop,report,status);
                if (report & SAA7134_IRQ_REPORT_PE) {
                        /* disable all parity error */
                        pr_warn("%s/irq: looping -- clearing PE (parity error!) enable bit\n",
                                dev->name);
                        saa_clearl(SAA7134_IRQ2,SAA7134_IRQ2_INTE_PE);
                } else if (report & SAA7134_IRQ_REPORT_GPIO16) {
                        /* disable gpio16 IRQ */
                        pr_warn("%s/irq: looping -- clearing GPIO16 enable bit\n",
                                dev->name);
                        saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO16_P);
                        saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO16_N);
                } else if (report & SAA7134_IRQ_REPORT_GPIO18) {
                        /* disable gpio18 IRQs */
                        pr_warn("%s/irq: looping -- clearing GPIO18 enable bit\n",
                                dev->name);
                        saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18_P);
                        saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18_N);
                } else {
                        /* disable all irqs */
                        pr_warn("%s/irq: looping -- clearing all enable bits\n",
                                dev->name);
                        saa_writel(SAA7134_IRQ1,0);
                        saa_writel(SAA7134_IRQ2,0);
                }
        }

 out:
        return IRQ_RETVAL(handled);
}

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

/* early init (no i2c, no irq) */

static int saa7134_hw_enable1(struct saa7134_dev *dev)
{
        /* RAM FIFO config */
        saa_writel(SAA7134_FIFO_SIZE, 0x08070503);
        saa_writel(SAA7134_THRESHOULD, 0x02020202);

        /* enable audio + video processing */
        saa_writel(SAA7134_MAIN_CTRL,
                        SAA7134_MAIN_CTRL_VPLLE |
                        SAA7134_MAIN_CTRL_APLLE |
                        SAA7134_MAIN_CTRL_EXOSC |
                        SAA7134_MAIN_CTRL_EVFE1 |
                        SAA7134_MAIN_CTRL_EVFE2 |
                        SAA7134_MAIN_CTRL_ESFE  |
                        SAA7134_MAIN_CTRL_EBDAC);

        /*
        * Initialize OSS _after_ enabling audio clock PLL and audio processing.
        * OSS initialization writes to registers via the audio DSP; these
        * writes will fail unless the audio clock has been started.  At worst,
        * audio will not work.
        */

        /* enable peripheral devices */
        saa_writeb(SAA7134_SPECIAL_MODE, 0x01);

        /* set vertical line numbering start (vbi needs this) */
        saa_writeb(SAA7134_SOURCE_TIMING2, 0x20);

        return 0;
}

static int saa7134_hwinit1(struct saa7134_dev *dev)
{
        core_dbg("hwinit1\n");

        saa_writel(SAA7134_IRQ1, 0);
        saa_writel(SAA7134_IRQ2, 0);

        /* Clear any stale IRQ reports */
        saa_writel(SAA7134_IRQ_REPORT, saa_readl(SAA7134_IRQ_REPORT));

        mutex_init(&dev->lock);
        spin_lock_init(&dev->slock);

        saa7134_track_gpio(dev,"pre-init");
        saa7134_video_init1(dev);
        saa7134_vbi_init1(dev);
        if (card_has_mpeg(dev))
                saa7134_ts_init1(dev);
        saa7134_input_init1(dev);

        saa7134_hw_enable1(dev);

        return 0;
}

/* late init (with i2c + irq) */
static int saa7134_hw_enable2(struct saa7134_dev *dev)
{

        unsigned int irq2_mask;

        /* enable IRQ's */
        irq2_mask =
                SAA7134_IRQ2_INTE_DEC3    |
                SAA7134_IRQ2_INTE_DEC2    |
                SAA7134_IRQ2_INTE_DEC1    |
                SAA7134_IRQ2_INTE_DEC0    |
                SAA7134_IRQ2_INTE_PE      |
                SAA7134_IRQ2_INTE_AR;

        if (dev->has_remote == SAA7134_REMOTE_GPIO && dev->remote) {
                if (dev->remote->mask_keydown & 0x10000)
                        irq2_mask |= SAA7134_IRQ2_INTE_GPIO16_N;
                else {          /* Allow enabling both IRQ edge triggers */
                        if (dev->remote->mask_keydown & 0x40000)
                                irq2_mask |= SAA7134_IRQ2_INTE_GPIO18_P;
                        if (dev->remote->mask_keyup & 0x40000)
                                irq2_mask |= SAA7134_IRQ2_INTE_GPIO18_N;
                }
        }

        if (dev->has_remote == SAA7134_REMOTE_I2C) {
                request_module("ir-kbd-i2c");
        }

        saa_writel(SAA7134_IRQ1, 0);
        saa_writel(SAA7134_IRQ2, irq2_mask);

        return 0;
}

static int saa7134_hwinit2(struct saa7134_dev *dev)
{

        core_dbg("hwinit2\n");

        saa7134_video_init2(dev);
        saa7134_tvaudio_init2(dev);

        saa7134_hw_enable2(dev);

        return 0;
}


/* shutdown */
static int saa7134_hwfini(struct saa7134_dev *dev)
{
        core_dbg("hwfini\n");

        if (card_has_mpeg(dev))
                saa7134_ts_fini(dev);
        saa7134_input_fini(dev);
        saa7134_vbi_fini(dev);
        saa7134_tvaudio_fini(dev);
        saa7134_video_fini(dev);
        return 0;
}

static void must_configure_manually(int has_eeprom)
{
        unsigned int i,p;

        if (!has_eeprom)
                pr_warn("saa7134: <rant>\n"
                        "saa7134:  Congratulations!  Your TV card vendor saved a few\n"
                        "saa7134:  cents for a eeprom, thus your pci board has no\n"
                        "saa7134:  subsystem ID and I can't identify it automatically\n"
                        "saa7134: </rant>\n"
                        "saa7134: I feel better now.  Ok, here are the good news:\n"
                        "saa7134: You can use the card=<nr> insmod option to specify\n"
                        "saa7134: which board do you have.  The list:\n");
        else
                pr_warn("saa7134: Board is currently unknown. You might try to use the card=<nr>\n"
                        "saa7134: insmod option to specify which board do you have, but this is\n"
                        "saa7134: somewhat risky, as might damage your card. It is better to ask\n"
                        "saa7134: for support at linux-media@vger.kernel.org.\n"
                        "saa7134: The supported cards are:\n");

        for (i = 0; i < saa7134_bcount; i++) {
                pr_warn("saa7134:   card=%d -> %-40.40s",
                       i,saa7134_boards[i].name);
                for (p = 0; saa7134_pci_tbl[p].driver_data; p++) {
                        if (saa7134_pci_tbl[p].driver_data != i)
                                continue;
                        pr_cont(" %04x:%04x",
                               saa7134_pci_tbl[p].subvendor,
                               saa7134_pci_tbl[p].subdevice);
                }
                pr_cont("\n");
        }
}

static void saa7134_unregister_media_device(struct saa7134_dev *dev)
{

#ifdef CONFIG_MEDIA_CONTROLLER
        if (!dev->media_dev)
                return;
        media_device_unregister(dev->media_dev);
        media_device_cleanup(dev->media_dev);
        kfree(dev->media_dev);
        dev->media_dev = NULL;
#endif
}

static void saa7134_media_release(struct saa7134_dev *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
        int i;

        for (i = 0; i < SAA7134_INPUT_MAX + 1; i++)
                media_device_unregister_entity(&dev->input_ent[i]);
#endif
}

#if defined(CONFIG_MEDIA_CONTROLLER)
static void saa7134_create_entities(struct saa7134_dev *dev)
{
        int ret, i;
        struct media_entity *entity;
        struct media_entity *decoder = NULL;

        /* Check if it is using an external analog TV demod */
        media_device_for_each_entity(entity, dev->media_dev) {
                if (entity->function == MEDIA_ENT_F_ATV_DECODER) {
                        decoder = entity;
                        break;
                }
        }

        /*
         * saa713x is not using an external ATV demod.
         * Register the internal one
         */
        if (!decoder) {
                dev->demod.name = "saa713x";
                dev->demod_pad[SAA7134_PAD_IF_INPUT].flags = MEDIA_PAD_FL_SINK;
                dev->demod_pad[SAA7134_PAD_IF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
                dev->demod_pad[SAA7134_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
                dev->demod_pad[SAA7134_PAD_VID_OUT].sig_type = PAD_SIGNAL_DV;
                dev->demod.function = MEDIA_ENT_F_ATV_DECODER;

                ret = media_entity_pads_init(&dev->demod, SAA7134_NUM_PADS,
                                             dev->demod_pad);
                if (ret < 0)
                        pr_err("failed to initialize demod pad!\n");

                ret = media_device_register_entity(dev->media_dev, &dev->demod);
                if (ret < 0)
                        pr_err("failed to register demod entity!\n");

                dev->decoder = &dev->demod;
        } else {
                dev->decoder = decoder;
        }

        /* Initialize Video, VBI and Radio pads */
        dev->video_pad.flags = MEDIA_PAD_FL_SINK;
        ret = media_entity_pads_init(&dev->video_dev->entity, 1,
                                     &dev->video_pad);
        if (ret < 0)
                pr_err("failed to initialize video media entity!\n");

        dev->vbi_pad.flags = MEDIA_PAD_FL_SINK;
        ret = media_entity_pads_init(&dev->vbi_dev->entity, 1,
                                        &dev->vbi_pad);
        if (ret < 0)
                pr_err("failed to initialize vbi media entity!\n");

        /* Create entities for each input connector */
        for (i = 0; i < SAA7134_INPUT_MAX; i++) {
                struct media_entity *ent = &dev->input_ent[i];
                struct saa7134_input *in = &card_in(dev, i);

                if (in->type == SAA7134_NO_INPUT)
                        break;

                /* This input uses the S-Video connector */
                if (in->type == SAA7134_INPUT_COMPOSITE_OVER_SVIDEO)
                        continue;

                ent->name = saa7134_input_name[in->type];
                ent->flags = MEDIA_ENT_FL_CONNECTOR;
                dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;

                switch (in->type) {
                case SAA7134_INPUT_COMPOSITE:
                case SAA7134_INPUT_COMPOSITE0:
                case SAA7134_INPUT_COMPOSITE1:
                case SAA7134_INPUT_COMPOSITE2:
                case SAA7134_INPUT_COMPOSITE3:
                case SAA7134_INPUT_COMPOSITE4:
                        ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
                        break;
                case SAA7134_INPUT_SVIDEO:
                case SAA7134_INPUT_SVIDEO0:
                case SAA7134_INPUT_SVIDEO1:
                        ent->function = MEDIA_ENT_F_CONN_SVIDEO;
                        break;
                default:
                        /*
                         * SAA7134_INPUT_TV and SAA7134_INPUT_TV_MONO.
                         *
                         * Please notice that neither SAA7134_INPUT_MUTE or
                         * SAA7134_INPUT_RADIO are defined at
                         * saa7134_board.input.
                         */
                        ent->function = MEDIA_ENT_F_CONN_RF;
                        break;
                }

                ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
                if (ret < 0)
                        pr_err("failed to initialize input pad[%d]!\n", i);

                ret = media_device_register_entity(dev->media_dev, ent);
                if (ret < 0)
                        pr_err("failed to register input entity %d!\n", i);
        }

        /* Create input for Radio RF connector */
        if (card_has_radio(dev)) {
                struct saa7134_input *in = &saa7134_boards[dev->board].radio;
                struct media_entity *ent = &dev->input_ent[i];

                ent->name = saa7134_input_name[in->type];
                ent->flags = MEDIA_ENT_FL_CONNECTOR;
                dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;
                ent->function = MEDIA_ENT_F_CONN_RF;

                ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
                if (ret < 0)
                        pr_err("failed to initialize input pad[%d]!\n", i);

                ret = media_device_register_entity(dev->media_dev, ent);
                if (ret < 0)
                        pr_err("failed to register input entity %d!\n", i);
        }
}
#endif

static struct video_device *vdev_init(struct saa7134_dev *dev,
                                      struct video_device *template,
                                      char *type)
{
        struct video_device *vfd;

        vfd = video_device_alloc();
        if (NULL == vfd)
                return NULL;
        *vfd = *template;
        vfd->v4l2_dev  = &dev->v4l2_dev;
        vfd->release = video_device_release;
        snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)",
                 dev->name, type, saa7134_boards[dev->board].name);
        video_set_drvdata(vfd, dev);
        return vfd;
}

static void saa7134_unregister_video(struct saa7134_dev *dev)
{
        saa7134_media_release(dev);

        if (dev->video_dev) {
                if (video_is_registered(dev->video_dev))
                        vb2_video_unregister_device(dev->video_dev);
                else
                        video_device_release(dev->video_dev);
                dev->video_dev = NULL;
        }
        if (dev->vbi_dev) {
                if (video_is_registered(dev->vbi_dev))
                        vb2_video_unregister_device(dev->vbi_dev);
                else
                        video_device_release(dev->vbi_dev);
                dev->vbi_dev = NULL;
        }
        if (dev->radio_dev) {
                if (video_is_registered(dev->radio_dev))
                        video_unregister_device(dev->radio_dev);
                else
                        video_device_release(dev->radio_dev);
                dev->radio_dev = NULL;
        }
}

static void mpeg_ops_attach(struct saa7134_mpeg_ops *ops,
                            struct saa7134_dev *dev)
{
        int err;

        if (NULL != dev->mops)
                return;
        if (saa7134_boards[dev->board].mpeg != ops->type)
                return;
        err = ops->init(dev);
        if (0 != err)
                return;
        dev->mops = ops;
}

static void mpeg_ops_detach(struct saa7134_mpeg_ops *ops,
                            struct saa7134_dev *dev)
{
        if (NULL == dev->mops)
                return;
        if (dev->mops != ops)
                return;
        dev->mops->fini(dev);
        dev->mops = NULL;
}

static int saa7134_initdev(struct pci_dev *pci_dev,
                           const struct pci_device_id *pci_id)
{
        struct saa7134_dev *dev;
        struct saa7134_mpeg_ops *mops;
        int err;

        if (saa7134_devcount == SAA7134_MAXBOARDS)
                return -ENOMEM;

        dev = kzalloc_obj(*dev);
        if (NULL == dev)
                return -ENOMEM;

        dev->nr = saa7134_devcount;
        sprintf(dev->name, "saa%x[%d]", pci_dev->device, dev->nr);

#ifdef CONFIG_MEDIA_CONTROLLER
        dev->media_dev = kzalloc_obj(*dev->media_dev);
        if (!dev->media_dev) {
                err = -ENOMEM;
                goto err_free_dev;
        }
        media_device_pci_init(dev->media_dev, pci_dev, dev->name);
        dev->v4l2_dev.mdev = dev->media_dev;
#endif

        err = v4l2_device_register(&pci_dev->dev, &dev->v4l2_dev);
        if (err)
                goto err_free_dev;

        /* pci init */
        dev->pci = pci_dev;
        if (pci_enable_device(pci_dev)) {
                err = -EIO;
                goto err_v4l2_unregister;
        }

        /* pci quirks */
        if (pci_pci_problems) {
                if (pci_pci_problems & PCIPCI_TRITON)
                        pr_info("%s: quirk: PCIPCI_TRITON\n", dev->name);
                if (pci_pci_problems & PCIPCI_NATOMA)
                        pr_info("%s: quirk: PCIPCI_NATOMA\n", dev->name);
                if (pci_pci_problems & PCIPCI_VIAETBF)
                        pr_info("%s: quirk: PCIPCI_VIAETBF\n", dev->name);
                if (pci_pci_problems & PCIPCI_VSFX)
                        pr_info("%s: quirk: PCIPCI_VSFX\n", dev->name);
#ifdef PCIPCI_ALIMAGIK
                if (pci_pci_problems & PCIPCI_ALIMAGIK) {
                        pr_info("%s: quirk: PCIPCI_ALIMAGIK -- latency fixup\n",
                               dev->name);
                        latency = 0x0A;
                }
#endif
        }
        if (UNSET != latency) {
                pr_info("%s: setting pci latency timer to %d\n",
                       dev->name,latency);
                pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, latency);
        }

        /* print pci info */
        dev->pci_rev = pci_dev->revision;
        pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER,  &dev->pci_lat);
        pr_info("%s: found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
                dev->name, pci_name(pci_dev), dev->pci_rev, pci_dev->irq,
                dev->pci_lat,
                (unsigned long long)pci_resource_start(pci_dev, 0));
        pci_set_master(pci_dev);
        err = dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32));
        if (err) {
                pr_warn("%s: Oops: no 32bit PCI DMA ???\n", dev->name);
                goto err_v4l2_unregister;
        }

        /* board config */
        dev->board = pci_id->driver_data;
        if ((unsigned)card[dev->nr] < saa7134_bcount)
                dev->board = card[dev->nr];
        if (SAA7134_BOARD_UNKNOWN == dev->board)
                must_configure_manually(0);
        else if (SAA7134_BOARD_NOAUTO == dev->board) {
                must_configure_manually(1);
                dev->board = SAA7134_BOARD_UNKNOWN;
        }
        dev->autodetected = card[dev->nr] != dev->board;
        dev->tuner_type = saa7134_boards[dev->board].tuner_type;
        dev->tuner_addr = saa7134_boards[dev->board].tuner_addr;
        dev->radio_type = saa7134_boards[dev->board].radio_type;
        dev->radio_addr = saa7134_boards[dev->board].radio_addr;
        dev->tda9887_conf = saa7134_boards[dev->board].tda9887_conf;
        if (UNSET != tuner[dev->nr])
                dev->tuner_type = tuner[dev->nr];
        pr_info("%s: subsystem: %04x:%04x, board: %s [card=%d,%s]\n",
                dev->name,pci_dev->subsystem_vendor,
                pci_dev->subsystem_device,saa7134_boards[dev->board].name,
                dev->board, dev->autodetected ?
                "autodetected" : "insmod option");

        /* get mmio */
        if (!request_mem_region(pci_resource_start(pci_dev,0),
                                pci_resource_len(pci_dev,0),
                                dev->name)) {
                err = -EBUSY;
                pr_err("%s: can't get MMIO memory @ 0x%llx\n",
                       dev->name,(unsigned long long)pci_resource_start(pci_dev,0));
                goto err_v4l2_unregister;
        }
        dev->lmmio = ioremap(pci_resource_start(pci_dev, 0),
                             pci_resource_len(pci_dev, 0));
        dev->bmmio = (__u8 __iomem *)dev->lmmio;
        if (NULL == dev->lmmio) {
                err = -EIO;
                pr_err("%s: can't ioremap() MMIO memory\n",
                       dev->name);
                goto err_release_mem_reg;
        }

        /* initialize hardware #1 */
        saa7134_board_init1(dev);
        saa7134_hwinit1(dev);

        /* get irq */
        err = request_irq(pci_dev->irq, saa7134_irq,
                          IRQF_SHARED, dev->name, dev);
        if (err < 0) {
                pr_err("%s: can't get IRQ %d\n",
                       dev->name,pci_dev->irq);
                goto err_iounmap;
        }

        /* wait a bit, register i2c bus */
        msleep(100);
        saa7134_i2c_register(dev);
        saa7134_board_init2(dev);

        saa7134_hwinit2(dev);

        /* load i2c helpers */
        if (card_is_empress(dev)) {
                dev->empress_sd =
                        v4l2_i2c_new_subdev(&dev->v4l2_dev, &dev->i2c_adap,
                                "saa6752hs",
                                saa7134_boards[dev->board].empress_addr, NULL);

                if (dev->empress_sd)
                        dev->empress_sd->grp_id = GRP_EMPRESS;
        }

        if (saa7134_boards[dev->board].rds_addr) {
                struct v4l2_subdev *sd;

                sd = v4l2_i2c_new_subdev(&dev->v4l2_dev,
                                &dev->i2c_adap, "saa6588",
                                0, I2C_ADDRS(saa7134_boards[dev->board].rds_addr));
                if (sd) {
                        pr_info("%s: found RDS decoder\n", dev->name);
                        dev->has_rds = 1;
                }
        }

        mutex_lock(&saa7134_devlist_lock);
        list_for_each_entry(mops, &mops_list, next)
                mpeg_ops_attach(mops, dev);
        list_add_tail(&dev->devlist, &saa7134_devlist);
        mutex_unlock(&saa7134_devlist_lock);

        /* check for signal */
        saa7134_irq_video_signalchange(dev);

        if (TUNER_ABSENT != dev->tuner_type)
                saa_call_all(dev, core, s_power, 0);

        /* register v4l devices */
        dev->video_dev = vdev_init(dev,&saa7134_video_template,"video");
        dev->video_dev->ctrl_handler = &dev->ctrl_handler;
        dev->video_dev->lock = &dev->lock;
        dev->video_dev->queue = &dev->video_vbq;
        dev->video_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                                      V4L2_CAP_VIDEO_CAPTURE;
        if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
                dev->video_dev->device_caps |= V4L2_CAP_TUNER;

        err = video_register_device(dev->video_dev,VFL_TYPE_VIDEO,
                                    video_nr[dev->nr]);
        if (err < 0) {
                pr_info("%s: can't register video device\n",
                       dev->name);
                goto err_unregister_video;
        }
        pr_info("%s: registered device %s [v4l2]\n",
               dev->name, video_device_node_name(dev->video_dev));

        dev->vbi_dev = vdev_init(dev, &saa7134_video_template, "vbi");
        dev->vbi_dev->ctrl_handler = &dev->ctrl_handler;
        dev->vbi_dev->lock = &dev->lock;
        dev->vbi_dev->queue = &dev->vbi_vbq;
        dev->vbi_dev->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
                                    V4L2_CAP_VBI_CAPTURE;
        if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type != UNSET)
                dev->vbi_dev->device_caps |= V4L2_CAP_TUNER;

        err = video_register_device(dev->vbi_dev,VFL_TYPE_VBI,
                                    vbi_nr[dev->nr]);
        if (err < 0)
                goto err_unregister_video;
        pr_info("%s: registered device %s\n",
               dev->name, video_device_node_name(dev->vbi_dev));

        if (card_has_radio(dev)) {
                dev->radio_dev = vdev_init(dev,&saa7134_radio_template,"radio");
                dev->radio_dev->ctrl_handler = &dev->radio_ctrl_handler;
                dev->radio_dev->lock = &dev->lock;
                dev->radio_dev->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
                if (dev->has_rds)
                        dev->radio_dev->device_caps |= V4L2_CAP_RDS_CAPTURE;
                err = video_register_device(dev->radio_dev,VFL_TYPE_RADIO,
                                            radio_nr[dev->nr]);
                if (err < 0)
                        goto err_unregister_video;
                pr_info("%s: registered device %s\n",
                       dev->name, video_device_node_name(dev->radio_dev));
        }

#ifdef CONFIG_MEDIA_CONTROLLER
        saa7134_create_entities(dev);

        err = v4l2_mc_create_media_graph(dev->media_dev);
        if (err) {
                pr_err("failed to create media graph\n");
                goto err_unregister_video;
        }
#endif
        /* everything worked */
        saa7134_devcount++;

        if (saa7134_dmasound_init && !dev->dmasound.priv_data)
                saa7134_dmasound_init(dev);

        request_submodules(dev);

        /*
         * Do it at the end, to reduce dynamic configuration changes during
         * the device init. Yet, as request_modules() can be async, the
         * topology will likely change after load the saa7134 subdrivers.
         */
#ifdef CONFIG_MEDIA_CONTROLLER
        err = media_device_register(dev->media_dev);
        if (err) {
                media_device_cleanup(dev->media_dev);
                goto err_unregister_video;
        }
#endif

        return 0;

err_unregister_video:
        saa7134_unregister_video(dev);
        list_del(&dev->devlist);
        saa7134_i2c_unregister(dev);
        free_irq(pci_dev->irq, dev);
err_iounmap:
        saa7134_hwfini(dev);
        iounmap(dev->lmmio);
err_release_mem_reg:
        release_mem_region(pci_resource_start(pci_dev,0),
                           pci_resource_len(pci_dev,0));
err_v4l2_unregister:
        v4l2_device_unregister(&dev->v4l2_dev);
err_free_dev:
#ifdef CONFIG_MEDIA_CONTROLLER
        kfree(dev->media_dev);
#endif
        kfree(dev);
        return err;
}

static void saa7134_finidev(struct pci_dev *pci_dev)
{
        struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
        struct saa7134_dev *dev = container_of(v4l2_dev, struct saa7134_dev, v4l2_dev);
        struct saa7134_mpeg_ops *mops;

        flush_request_submodules(dev);

        /* Release DMA sound modules if present */
        if (saa7134_dmasound_exit && dev->dmasound.priv_data) {
                saa7134_dmasound_exit(dev);
        }

        /* debugging ... */
        if (irq_debug) {
                u32 report = saa_readl(SAA7134_IRQ_REPORT);
                u32 status = saa_readl(SAA7134_IRQ_STATUS);
                print_irqstatus(dev,42,report,status);
        }

        /* disable peripheral devices */
        saa_writeb(SAA7134_SPECIAL_MODE,0);

        /* shutdown hardware */
        saa_writel(SAA7134_IRQ1,0);
        saa_writel(SAA7134_IRQ2,0);
        saa_writel(SAA7134_MAIN_CTRL,0);

        /* shutdown subsystems */
        saa7134_hwfini(dev);

        /* unregister */
        mutex_lock(&saa7134_devlist_lock);
        list_del(&dev->devlist);
        list_for_each_entry(mops, &mops_list, next)
                mpeg_ops_detach(mops, dev);
        mutex_unlock(&saa7134_devlist_lock);
        saa7134_devcount--;

        saa7134_i2c_unregister(dev);
        saa7134_unregister_video(dev);


        /* the DMA sound modules should be unloaded before reaching
           this, but just in case they are still present... */
        if (dev->dmasound.priv_data != NULL) {
                free_irq(pci_dev->irq, &dev->dmasound);
                dev->dmasound.priv_data = NULL;
        }


        /* release resources */
        free_irq(pci_dev->irq, dev);
        iounmap(dev->lmmio);
        release_mem_region(pci_resource_start(pci_dev,0),
                           pci_resource_len(pci_dev,0));

        v4l2_device_unregister(&dev->v4l2_dev);

        saa7134_unregister_media_device(dev);

        /* free memory */
        kfree(dev);
}

/* resends a current buffer in queue after resume */
static int __maybe_unused saa7134_buffer_requeue(struct saa7134_dev *dev,
                                                 struct saa7134_dmaqueue *q)
{
        struct saa7134_buf *buf, *next;

        assert_spin_locked(&dev->slock);

        buf  = q->curr;
        next = buf;
        core_dbg("buffer_requeue\n");

        if (!buf)
                return 0;

        core_dbg("buffer_requeue : resending active buffer\n");

        if (!list_empty(&q->queue))
                next = list_entry(q->queue.next, struct saa7134_buf,
                                          entry);
        buf->activate(dev, buf, next);

        return 0;
}

static int __maybe_unused saa7134_suspend(struct device *dev_d)
{
        struct pci_dev *pci_dev = to_pci_dev(dev_d);
        struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
        struct saa7134_dev *dev = container_of(v4l2_dev, struct saa7134_dev, v4l2_dev);

        /* Disable interrupts, DMA, and rest of the chip*/
        saa_writel(SAA7134_IRQ1, 0);
        saa_writel(SAA7134_IRQ2, 0);
        saa_writel(SAA7134_MAIN_CTRL, 0);

        dev->insuspend = 1;
        synchronize_irq(pci_dev->irq);

        /* ACK interrupts once more, just in case,
                since the IRQ handler won't ack them anymore*/

        saa_writel(SAA7134_IRQ_REPORT, saa_readl(SAA7134_IRQ_REPORT));

        /* Disable timeout timers - if we have active buffers, we will
           fill them on resume*/

        timer_delete(&dev->video_q.timeout);
        timer_delete(&dev->vbi_q.timeout);
        timer_delete(&dev->ts_q.timeout);

        if (dev->remote && dev->remote->dev->users)
                saa7134_ir_close(dev->remote->dev);

        return 0;
}

static int __maybe_unused saa7134_resume(struct device *dev_d)
{
        struct v4l2_device *v4l2_dev = dev_get_drvdata(dev_d);
        struct saa7134_dev *dev = container_of(v4l2_dev, struct saa7134_dev, v4l2_dev);
        unsigned long flags;

        /* Do things that are done in saa7134_initdev ,
                except of initializing memory structures.*/

        saa7134_board_init1(dev);

        /* saa7134_hwinit1 */
        if (saa7134_boards[dev->board].video_out)
                saa7134_videoport_init(dev);
        if (card_has_mpeg(dev))
                saa7134_ts_init_hw(dev);
        if (dev->remote && dev->remote->dev->users)
                saa7134_ir_open(dev->remote->dev);
        saa7134_hw_enable1(dev);

        msleep(100);

        saa7134_board_init2(dev);

        /*saa7134_hwinit2*/
        saa7134_set_tvnorm_hw(dev);
        saa7134_tvaudio_setmute(dev);
        saa7134_tvaudio_setvolume(dev, dev->ctl_volume);
        saa7134_tvaudio_init(dev);
        saa7134_enable_i2s(dev);
        saa7134_hw_enable2(dev);

        saa7134_irq_video_signalchange(dev);

        /*resume unfinished buffer(s)*/
        spin_lock_irqsave(&dev->slock, flags);
        saa7134_buffer_requeue(dev, &dev->video_q);
        saa7134_buffer_requeue(dev, &dev->vbi_q);
        saa7134_buffer_requeue(dev, &dev->ts_q);

        /* FIXME: Disable DMA audio sound - temporary till proper support
                  is implemented*/

        dev->dmasound.dma_running = 0;

        /* start DMA now*/
        dev->insuspend = 0;
        smp_wmb();
        saa7134_set_dmabits(dev);
        spin_unlock_irqrestore(&dev->slock, flags);

        return 0;
}

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

int saa7134_ts_register(struct saa7134_mpeg_ops *ops)
{
        struct saa7134_dev *dev;

        mutex_lock(&saa7134_devlist_lock);
        list_for_each_entry(dev, &saa7134_devlist, devlist)
                mpeg_ops_attach(ops, dev);
        list_add_tail(&ops->next,&mops_list);
        mutex_unlock(&saa7134_devlist_lock);
        return 0;
}

void saa7134_ts_unregister(struct saa7134_mpeg_ops *ops)
{
        struct saa7134_dev *dev;

        mutex_lock(&saa7134_devlist_lock);
        list_del(&ops->next);
        list_for_each_entry(dev, &saa7134_devlist, devlist)
                mpeg_ops_detach(ops, dev);
        mutex_unlock(&saa7134_devlist_lock);
}

EXPORT_SYMBOL(saa7134_ts_register);
EXPORT_SYMBOL(saa7134_ts_unregister);

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

static SIMPLE_DEV_PM_OPS(saa7134_pm_ops, saa7134_suspend, saa7134_resume);

static struct pci_driver saa7134_pci_driver = {
        .name     = "saa7134",
        .id_table = saa7134_pci_tbl,
        .probe    = saa7134_initdev,
        .remove   = saa7134_finidev,
        .driver.pm = &saa7134_pm_ops,
};

static int __init saa7134_init(void)
{
        pr_info("saa7130/34: v4l2 driver version %s loaded\n",
               SAA7134_VERSION);
        return pci_register_driver(&saa7134_pci_driver);
}

static void __exit saa7134_fini(void)
{
        pci_unregister_driver(&saa7134_pci_driver);
}

module_init(saa7134_init);
module_exit(saa7134_fini);

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

EXPORT_SYMBOL(saa7134_set_gpio);
EXPORT_SYMBOL(saa7134_boards);

/* ----------------- for the DMA sound modules --------------- */

EXPORT_SYMBOL(saa7134_dmasound_init);
EXPORT_SYMBOL(saa7134_dmasound_exit);
EXPORT_SYMBOL(saa7134_pgtable_free);
EXPORT_SYMBOL(saa7134_pgtable_build);
EXPORT_SYMBOL(saa7134_pgtable_alloc);
EXPORT_SYMBOL(saa7134_set_dmabits);