[deliverable/linux.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/moduleparam.h>
#include <linux/init.h>
#include <linux/device.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: " fmt, dev->core->name , ## arg)

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

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

	dprintk(0, "cx8802_start_dma %d\n", buf->vb.width);

	/* 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? */

	if (cx88_boards[core->board].dvb) {
		/* 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->board) {
		case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
		case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
		case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
			cx_write(TS_SOP_STAT, 1<<13);
			break;
		default:
			cx_write(TS_SOP_STAT, 0x00);
			break;
		}
		cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
		udelay(100);
	}

	if (cx88_boards[core->board].blackbird) {
		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);
	}

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

	/* enable irqs */
	dprintk( 0, "setting the interrupt mask\n" );
	cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x04);
	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( 0, "cx8802_stop_dma\n" );

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

	/* disable irqs */
	cx_clear(MO_PCI_INTMSK, 0x000004);
	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;
	struct list_head *item;

	dprintk( 0, "cx8802_restart_queue\n" );
	if (list_empty(&q->active))
	{
		dprintk( 0, "cx8802_restart_queue: queue is empty\n" );
		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(item,&q->active) {
		buf = list_entry(item, struct cx88_buffer, vb.queue);
		buf->count = q->count++;
	}
	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
	return 0;
}

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

int cx8802_buf_prepare(struct cx8802_dev *dev, struct cx88_buffer *buf)
{
	int size = dev->ts_packet_size * dev->ts_packet_count;
	int rc;

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

	if (STATE_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  = V4L2_FIELD_TOP;

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

 fail:
	cx88_free_buffer(dev->pci,buf);
	return rc;
}

void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
{
	struct cx88_buffer    *prev;
	struct cx88_dmaqueue  *q    = &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(q->stopper.dma);

	if (list_empty(&q->active)) {
		dprintk( 0, "queue is empty - first active\n" );
		list_add_tail(&buf->vb.queue,&q->active);
		cx8802_start_dma(dev, q, buf);
		buf->vb.state = STATE_ACTIVE;
		buf->count    = q->count++;
		mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
		dprintk(0,"[%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(q->active.prev, struct cx88_buffer, vb.queue);
		list_add_tail(&buf->vb.queue,&q->active);
		buf->vb.state = STATE_ACTIVE;
		buf->count    = q->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 = STATE_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(0, "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(0, "%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, 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 pt_regs *regs)
{
	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 | 0x04);
		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 & 0x04)
			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);
}

/* ----------------------------------------------------------- */
/* exported stuff                                              */

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,0xffffffff)) {
		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%lx\n", dev->core->name,
	       pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
	       dev->pci_lat,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,
			  SA_SHIRQ | SA_INTERRUPT, 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;
}

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);
}

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

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;
}

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

	if (dev->state.disabled) {
		pci_enable_device(pci_dev);
		dev->state.disabled = 0;
	}
	pci_set_power_state(pci_dev, PCI_D0);
	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;
}

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

EXPORT_SYMBOL(cx8802_buf_prepare);
EXPORT_SYMBOL(cx8802_buf_queue);
EXPORT_SYMBOL(cx8802_cancel_buffers);

EXPORT_SYMBOL(cx8802_init_common);
EXPORT_SYMBOL(cx8802_fini_common);

EXPORT_SYMBOL(cx8802_suspend_common);
EXPORT_SYMBOL(cx8802_resume_common);

/* ----------------------------------------------------------- */
/*
 * 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
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	*
	3	* Support for the mpeg transport stream transfers
	4	* PCI function #2 of the cx2388x.
	5	*
	6	* (c) 2004 Jelle Foks <jelle@foks.8m.com>
	7	* (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
	8	* (c) 2004 Gerd Knorr <kraxel@bytesex.org>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	23	*/
	24
	25	#include <linux/module.h>
	26	#include <linux/moduleparam.h>
	27	#include <linux/init.h>
	28	#include <linux/device.h>
	29	#include <linux/interrupt.h>
	30	#include <asm/delay.h>
	31
	32	#include "cx88.h"
	33
	34	/* ------------------------------------------------------------------ */
	35
	36	MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
	37	MODULE_AUTHOR("Jelle Foks <jelle@foks.8m.com>");
	38	MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
	39	MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
	40	MODULE_LICENSE("GPL");
	41
	42	static unsigned int debug = 0;
	43	module_param(debug,int,0644);
	44	MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
	45
	46	#define dprintk(level,fmt, arg...) if (debug >= level) \
	47	printk(KERN_DEBUG "%s/2: " fmt, dev->core->name , ## arg)
	48
	49	/* ------------------------------------------------------------------ */
	50
	51	static int cx8802_start_dma(struct cx8802_dev *dev,
	52	struct cx88_dmaqueue *q,
	53	struct cx88_buffer *buf)
	54	{
	55	struct cx88_core *core = dev->core;
	56
b45009b0	57	dprintk(0, "cx8802_start_dma %d\n", buf->vb.width);
1da177e4 LT	58
	59	/* setup fifo + format */
	60	cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
	61	dev->ts_packet_size, buf->risc.dma);
	62
	63	/* write TS length to chip */
	64	cx_write(MO_TS_LNGTH, buf->vb.width);
	65
1da177e4 LT	66	/* FIXME: this needs a review.
	67	* also: move to cx88-blackbird + cx88-dvb source files? */
	68
	69	if (cx88_boards[core->board].dvb) {
	70	/* negedge driven & software reset */
f1798495	71	cx_write(TS_GEN_CNTRL, 0x0040 \| dev->ts_gen_cntrl);
1da177e4 LT	72	udelay(100);
1da177e4 LT	73	cx_write(MO_PINMUX_IO, 0x00);
0d723c09	74	cx_write(TS_HW_SOP_CNTRL,0x47<<16\|188<<4\|0x01);
e52e98a7 MCC	75	switch (core->board) {
	76	case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
	77	case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
	78	case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
41ef7c1e	79	cx_write(TS_SOP_STAT, 1<<13);
e52e98a7 MCC	80	break;
e52e98a7 MCC	81	default:
41ef7c1e	82	cx_write(TS_SOP_STAT, 0x00);
e52e98a7	83	break;
f1798495	84	}
1da177e4 LT	85	cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
	86	udelay(100);
	87	}
	88
	89	if (cx88_boards[core->board].blackbird) {
	90	cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
	91
1da177e4 LT	92	cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
	93	udelay(100);
	94
	95	cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
1da177e4 LT	96	cx_write(TS_VALERR_CNTRL, 0x2000);
	97
	98	cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
	99	udelay(100);
	100	}
1da177e4 LT	101
	102	/* reset counter */
	103	cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
	104	q->count = 1;
	105
	106	/* enable irqs */
b45009b0	107	dprintk( 0, "setting the interrupt mask\n" );
1da177e4	108	cx_set(MO_PCI_INTMSK, core->pci_irqmask \| 0x04);
b45009b0	109	cx_set(MO_TS_INTMSK, 0x1f0011);
1da177e4 LT	110
1da177e4 LT	111	/* start dma */
b45009b0 MCC	112	cx_set(MO_DEV_CNTRL2, (1<<5));
b45009b0 MCC	113	cx_set(MO_TS_DMACNTRL, 0x11);
1da177e4 LT	114	return 0;
	115	}
	116
	117	static int cx8802_stop_dma(struct cx8802_dev *dev)
	118	{
	119	struct cx88_core *core = dev->core;
b45009b0	120	dprintk( 0, "cx8802_stop_dma\n" );
1da177e4 LT	121
	122	/* stop dma */
	123	cx_clear(MO_TS_DMACNTRL, 0x11);
	124
	125	/* disable irqs */
	126	cx_clear(MO_PCI_INTMSK, 0x000004);
	127	cx_clear(MO_TS_INTMSK, 0x1f0011);
	128
	129	/* Reset the controller */
	130	cx_write(TS_GEN_CNTRL, 0xcd);
	131	return 0;
	132	}
	133
	134	static int cx8802_restart_queue(struct cx8802_dev *dev,
	135	struct cx88_dmaqueue *q)
	136	{
	137	struct cx88_buffer *buf;
	138	struct list_head *item;
	139
b45009b0	140	dprintk( 0, "cx8802_restart_queue\n" );
1da177e4	141	if (list_empty(&q->active))
b45009b0 MCC	142	{
b45009b0 MCC	143	dprintk( 0, "cx8802_restart_queue: queue is empty\n" );
1da177e4	144	return 0;
b45009b0	145	}
1da177e4 LT	146
	147	buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
	148	dprintk(2,"restart_queue [%p/%d]: restart dma\n",
	149	buf, buf->vb.i);
	150	cx8802_start_dma(dev, q, buf);
	151	list_for_each(item,&q->active) {
	152	buf = list_entry(item, struct cx88_buffer, vb.queue);
	153	buf->count = q->count++;
	154	}
	155	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
	156	return 0;
	157	}
	158
	159	/* ------------------------------------------------------------------ */
	160
	161	int cx8802_buf_prepare(struct cx8802_dev dev, struct cx88_buffer buf)
	162	{
	163	int size = dev->ts_packet_size * dev->ts_packet_count;
	164	int rc;
	165
	166	dprintk(1, "%s: %p\n", __FUNCTION__, buf);
	167	if (0 != buf->vb.baddr && buf->vb.bsize < size)
	168	return -EINVAL;
	169
	170	if (STATE_NEEDS_INIT == buf->vb.state) {
	171	buf->vb.width = dev->ts_packet_size;
	172	buf->vb.height = dev->ts_packet_count;
	173	buf->vb.size = size;
	174	buf->vb.field = V4L2_FIELD_TOP;
	175
	176	if (0 != (rc = videobuf_iolock(dev->pci,&buf->vb,NULL)))
	177	goto fail;
	178	cx88_risc_databuffer(dev->pci, &buf->risc,
	179	buf->vb.dma.sglist,
	180	buf->vb.width, buf->vb.height);
	181	}
	182	buf->vb.state = STATE_PREPARED;
	183	return 0;
	184
	185	fail:
	186	cx88_free_buffer(dev->pci,buf);
	187	return rc;
	188	}
	189
	190	void cx8802_buf_queue(struct cx8802_dev dev, struct cx88_buffer buf)
	191	{
	192	struct cx88_buffer *prev;
	193	struct cx88_dmaqueue *q = &dev->mpegq;
	194
b45009b0	195	dprintk( 1, "cx8802_buf_queue\n" );
1da177e4 LT	196	/* add jump to stopper */
	197	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP \| RISC_IRQ1 \| RISC_CNT_INC);
	198	buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
	199
	200	if (list_empty(&q->active)) {
b45009b0	201	dprintk( 0, "queue is empty - first active\n" );
1da177e4 LT	202	list_add_tail(&buf->vb.queue,&q->active);
	203	cx8802_start_dma(dev, q, buf);
	204	buf->vb.state = STATE_ACTIVE;
	205	buf->count = q->count++;
	206	mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
b45009b0	207	dprintk(0,"[%p/%d] %s - first active\n",
1da177e4 LT	208	buf, buf->vb.i, __FUNCTION__);
	209
	210	} else {
b45009b0	211	dprintk( 1, "queue is not empty - append to active\n" );
1da177e4 LT	212	prev = list_entry(q->active.prev, struct cx88_buffer, vb.queue);
	213	list_add_tail(&buf->vb.queue,&q->active);
	214	buf->vb.state = STATE_ACTIVE;
	215	buf->count = q->count++;
	216	prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
b45009b0	217	dprintk( 1, "[%p/%d] %s - append to active\n",
1da177e4 LT	218	buf, buf->vb.i, __FUNCTION__);
	219	}
	220	}
	221
	222	/* ----------------------------------------------------------- */
	223
	224	static void do_cancel_buffers(struct cx8802_dev dev, char reason, int restart)
	225	{
	226	struct cx88_dmaqueue *q = &dev->mpegq;
	227	struct cx88_buffer *buf;
	228	unsigned long flags;
	229
	230	spin_lock_irqsave(&dev->slock,flags);
	231	while (!list_empty(&q->active)) {
	232	buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
	233	list_del(&buf->vb.queue);
	234	buf->vb.state = STATE_ERROR;
	235	wake_up(&buf->vb.done);
	236	dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
	237	buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
	238	}
	239	if (restart)
b45009b0 MCC	240	{
b45009b0 MCC	241	dprintk(0, "restarting queue\n" );
1da177e4	242	cx8802_restart_queue(dev,q);
b45009b0	243	}
1da177e4 LT	244	spin_unlock_irqrestore(&dev->slock,flags);
	245	}
	246
	247	void cx8802_cancel_buffers(struct cx8802_dev *dev)
	248	{
	249	struct cx88_dmaqueue *q = &dev->mpegq;
	250
b45009b0	251	dprintk( 1, "cx8802_cancel_buffers" );
1da177e4 LT	252	del_timer_sync(&q->timeout);
	253	cx8802_stop_dma(dev);
	254	do_cancel_buffers(dev,"cancel",0);
	255	}
	256
	257	static void cx8802_timeout(unsigned long data)
	258	{
	259	struct cx8802_dev dev = (struct cx8802_dev)data;
	260
b45009b0	261	dprintk(0, "%s\n",__FUNCTION__);
1da177e4 LT	262
	263	if (debug)
	264	cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
	265	cx8802_stop_dma(dev);
	266	do_cancel_buffers(dev,"timeout",1);
	267	}
	268
41ef7c1e MCC	269	static char *cx88_mpeg_irqs[32] = {
	270	"ts_risci1", NULL, NULL, NULL,
	271	"ts_risci2", NULL, NULL, NULL,
	272	"ts_oflow", NULL, NULL, NULL,
	273	"ts_sync", NULL, NULL, NULL,
	274	"opc_err", "par_err", "rip_err", "pci_abort",
	275	"ts_err?",
	276	};
	277
1da177e4 LT	278	static void cx8802_mpeg_irq(struct cx8802_dev *dev)
	279	{
	280	struct cx88_core *core = dev->core;
	281	u32 status, mask, count;
	282
b45009b0	283	dprintk( 1, "cx8802_mpeg_irq\n" );
1da177e4 LT	284	status = cx_read(MO_TS_INTSTAT);
	285	mask = cx_read(MO_TS_INTMSK);
	286	if (0 == (status & mask))
	287	return;
	288
	289	cx_write(MO_TS_INTSTAT, status);
41ef7c1e	290
1da177e4 LT	291	if (debug \|\| (status & mask & ~0xff))
	292	cx88_print_irqbits(core->name, "irq mpeg ",
	293	cx88_mpeg_irqs, status, mask);
	294
	295	/* risc op code error */
	296	if (status & (1 << 16)) {
	297	printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
	298	cx_clear(MO_TS_DMACNTRL, 0x11);
	299	cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
	300	}
	301
	302	/* risc1 y */
	303	if (status & 0x01) {
b45009b0	304	dprintk( 1, "wake up\n" );
1da177e4 LT	305	spin_lock(&dev->slock);
	306	count = cx_read(MO_TS_GPCNT);
	307	cx88_wakeup(dev->core, &dev->mpegq, count);
	308	spin_unlock(&dev->slock);
	309	}
	310
	311	/* risc2 y */
	312	if (status & 0x10) {
	313	spin_lock(&dev->slock);
	314	cx8802_restart_queue(dev,&dev->mpegq);
	315	spin_unlock(&dev->slock);
	316	}
	317
	318	/* other general errors */
	319	if (status & 0x1f0100) {
b45009b0	320	dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
1da177e4 LT	321	spin_lock(&dev->slock);
	322	cx8802_stop_dma(dev);
	323	cx8802_restart_queue(dev,&dev->mpegq);
	324	spin_unlock(&dev->slock);
	325	}
	326	}
	327
b45009b0 MCC	328	#define MAX_IRQ_LOOP 10
b45009b0 MCC	329
1da177e4 LT	330	static irqreturn_t cx8802_irq(int irq, void dev_id, struct pt_regs regs)
	331	{
	332	struct cx8802_dev *dev = dev_id;
	333	struct cx88_core *core = dev->core;
	334	u32 status;
	335	int loop, handled = 0;
	336
b45009b0	337	for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
1da177e4 LT	338	status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask \| 0x04);
	339	if (0 == status)
	340	goto out;
b45009b0 MCC	341	dprintk( 1, "cx8802_irq\n" );
	342	dprintk( 1, " loop: %d/%d\n", loop, MAX_IRQ_LOOP );
	343	dprintk( 1, " status: %d\n", status );
1da177e4 LT	344	handled = 1;
	345	cx_write(MO_PCI_INTSTAT, status);
	346
	347	if (status & core->pci_irqmask)
	348	cx88_core_irq(core,status);
	349	if (status & 0x04)
	350	cx8802_mpeg_irq(dev);
	351	};
b45009b0 MCC	352	if (MAX_IRQ_LOOP == loop) {
b45009b0 MCC	353	dprintk( 0, "clearing mask\n" );
1da177e4 LT	354	printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
	355	core->name);
	356	cx_write(MO_PCI_INTMSK,0);
	357	}
	358
	359	out:
	360	return IRQ_RETVAL(handled);
	361	}
	362
	363	/* ----------------------------------------------------------- */
	364	/* exported stuff */
	365
	366	int cx8802_init_common(struct cx8802_dev *dev)
	367	{
	368	struct cx88_core *core = dev->core;
	369	int err;
	370
	371	/* pci init */
	372	if (pci_enable_device(dev->pci))
	373	return -EIO;
	374	pci_set_master(dev->pci);
	375	if (!pci_dma_supported(dev->pci,0xffffffff)) {
	376	printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
	377	return -EIO;
	378	}
	379
	380	pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
	381	pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER, &dev->pci_lat);
	382	printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
	383	"latency: %d, mmio: 0x%lx\n", dev->core->name,
	384	pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
	385	dev->pci_lat,pci_resource_start(dev->pci,0));
	386
	387	/* initialize driver struct */
1da177e4 LT	388	spin_lock_init(&dev->slock);
	389
	390	/* init dma queue */
	391	INIT_LIST_HEAD(&dev->mpegq.active);
	392	INIT_LIST_HEAD(&dev->mpegq.queued);
	393	dev->mpegq.timeout.function = cx8802_timeout;
	394	dev->mpegq.timeout.data = (unsigned long)dev;
	395	init_timer(&dev->mpegq.timeout);
	396	cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
	397	MO_TS_DMACNTRL,0x11,0x00);
	398
	399	/* get irq */
	400	err = request_irq(dev->pci->irq, cx8802_irq,
	401	SA_SHIRQ \| SA_INTERRUPT, dev->core->name, dev);
	402	if (err < 0) {
	403	printk(KERN_ERR "%s: can't get IRQ %d\n",
	404	dev->core->name, dev->pci->irq);
	405	return err;
	406	}
	407	cx_set(MO_PCI_INTMSK, core->pci_irqmask);
	408
	409	/* everything worked */
	410	pci_set_drvdata(dev->pci,dev);
	411	return 0;
	412	}
	413
	414	void cx8802_fini_common(struct cx8802_dev *dev)
	415	{
b45009b0	416	dprintk( 2, "cx8802_fini_common\n" );
1da177e4 LT	417	cx8802_stop_dma(dev);
	418	pci_disable_device(dev->pci);
	419
	420	/* unregister stuff */
	421	free_irq(dev->pci->irq, dev);
	422	pci_set_drvdata(dev->pci, NULL);
	423
	424	/* free memory */
	425	btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
	426	}
	427
	428	/* ----------------------------------------------------------- */
	429
	430	int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
	431	{
	432	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
	433	struct cx88_core *core = dev->core;
	434
	435	/* stop mpeg dma */
	436	spin_lock(&dev->slock);
	437	if (!list_empty(&dev->mpegq.active)) {
b45009b0	438	dprintk( 2, "suspend\n" );
1da177e4 LT	439	printk("%s: suspend mpeg\n", core->name);
	440	cx8802_stop_dma(dev);
	441	del_timer(&dev->mpegq.timeout);
	442	}
	443	spin_unlock(&dev->slock);
	444
1da177e4 LT	445	/* FIXME -- shutdown device */
1da177e4 LT	446	cx88_shutdown(dev->core);
1da177e4 LT	447
	448	pci_save_state(pci_dev);
	449	if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
	450	pci_disable_device(pci_dev);
	451	dev->state.disabled = 1;
	452	}
	453	return 0;
	454	}
	455
	456	int cx8802_resume_common(struct pci_dev *pci_dev)
	457	{
	458	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
	459	struct cx88_core *core = dev->core;
	460
	461	if (dev->state.disabled) {
	462	pci_enable_device(pci_dev);
	463	dev->state.disabled = 0;
	464	}
	465	pci_set_power_state(pci_dev, PCI_D0);
	466	pci_restore_state(pci_dev);
	467
1da177e4 LT	468	/* FIXME: re-initialize hardware */
1da177e4 LT	469	cx88_reset(dev->core);
1da177e4 LT	470
	471	/* restart video+vbi capture */
	472	spin_lock(&dev->slock);
	473	if (!list_empty(&dev->mpegq.active)) {
	474	printk("%s: resume mpeg\n", core->name);
	475	cx8802_restart_queue(dev,&dev->mpegq);
	476	}
	477	spin_unlock(&dev->slock);
	478
	479	return 0;
	480	}
	481
	482	/* ----------------------------------------------------------- */
	483
	484	EXPORT_SYMBOL(cx8802_buf_prepare);
	485	EXPORT_SYMBOL(cx8802_buf_queue);
	486	EXPORT_SYMBOL(cx8802_cancel_buffers);
	487
	488	EXPORT_SYMBOL(cx8802_init_common);
	489	EXPORT_SYMBOL(cx8802_fini_common);
	490
	491	EXPORT_SYMBOL(cx8802_suspend_common);
	492	EXPORT_SYMBOL(cx8802_resume_common);
	493
	494	/* ----------------------------------------------------------- */
	495	/*
	496	* Local variables:
	497	* c-basic-offset: 8
	498	* End:
b45009b0	499	* 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
1da177e4	500	*/