Commit d1498ffc authored by Igor M. Liplianin's avatar Igor M. Liplianin Committed by Mauro Carvalho Chehab

V4L/DVB (10743): dm1105: not demuxing from interrupt context.

The driver already has DMA buffer organized like ringbuffer,
so it is easy to switch to a work queue.
Length of ringbuffer can easily be increased, if someone need it.
Signed-off-by: default avatarIgor M. Liplianin <liplianin@netup.ru>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent ac40d9e0
......@@ -220,10 +220,14 @@ struct dm1105dvb {
/* i2c */
struct i2c_adapter i2c_adap;
/* irq */
struct work_struct work;
/* dma */
dma_addr_t dma_addr;
unsigned char *ts_buf;
u32 wrp;
u32 nextwrp;
u32 buffer_size;
unsigned int PacketErrorCount;
unsigned int dmarst;
......@@ -415,6 +419,9 @@ static void dm1105_emit_key(unsigned long parm)
u8 data;
u16 keycode;
if (ir_debug)
printk(KERN_INFO "%s: received byte 0x%04x\n", __func__, ircom);
data = (ircom >> 8) & 0x7f;
input_event(ir->input_dev, EV_MSC, MSC_RAW, (0x0000f8 << 16) | data);
......@@ -431,26 +438,15 @@ static void dm1105_emit_key(unsigned long parm)
}
static irqreturn_t dm1105dvb_irq(int irq, void *dev_id)
/* work handler */
static void dm1105_dmx_buffer(struct work_struct *work)
{
struct dm1105dvb *dm1105dvb = dev_id;
unsigned int piece;
struct dm1105dvb *dm1105dvb =
container_of(work, struct dm1105dvb, work);
unsigned int nbpackets;
u32 command;
u32 nextwrp;
u32 oldwrp;
u32 oldwrp = dm1105dvb->wrp;
u32 nextwrp = dm1105dvb->nextwrp;
/* Read-Write INSTS Ack's Interrupt for DM1105 chip 16.03.2008 */
unsigned int intsts = inb(dm_io_mem(DM1105_INTSTS));
outb(intsts, dm_io_mem(DM1105_INTSTS));
switch (intsts) {
case INTSTS_TSIRQ:
case (INTSTS_TSIRQ | INTSTS_IR):
nextwrp = inl(dm_io_mem(DM1105_WRP)) -
inl(dm_io_mem(DM1105_STADR)) ;
oldwrp = dm1105dvb->wrp;
spin_lock(&dm1105dvb->lock);
if (!((dm1105dvb->ts_buf[oldwrp] == 0x47) &&
(dm1105dvb->ts_buf[oldwrp + 188] == 0x47) &&
(dm1105dvb->ts_buf[oldwrp + 188 * 2] == 0x47))) {
......@@ -462,33 +458,44 @@ static irqreturn_t dm1105dvb_irq(int irq, void *dev_id)
dm1105dvb->wrp = 0;
dm1105dvb->PacketErrorCount = 0;
dm1105dvb->dmarst = 0;
spin_unlock(&dm1105dvb->lock);
return IRQ_HANDLED;
return;
}
}
if (nextwrp < oldwrp) {
piece = dm1105dvb->buffer_size - oldwrp;
memcpy(dm1105dvb->ts_buf + dm1105dvb->buffer_size, dm1105dvb->ts_buf, nextwrp);
nbpackets = (piece + nextwrp)/188;
} else {
nbpackets = (nextwrp - oldwrp)/188;
}
dvb_dmx_swfilter_packets(&dm1105dvb->demux, &dm1105dvb->ts_buf[oldwrp], nbpackets);
memcpy(dm1105dvb->ts_buf + dm1105dvb->buffer_size,
dm1105dvb->ts_buf, nextwrp);
nbpackets = ((dm1105dvb->buffer_size - oldwrp) + nextwrp) / 188;
} else
nbpackets = (nextwrp - oldwrp) / 188;
dm1105dvb->wrp = nextwrp;
spin_unlock(&dm1105dvb->lock);
dvb_dmx_swfilter_packets(&dm1105dvb->demux,
&dm1105dvb->ts_buf[oldwrp], nbpackets);
}
static irqreturn_t dm1105dvb_irq(int irq, void *dev_id)
{
struct dm1105dvb *dm1105dvb = dev_id;
/* Read-Write INSTS Ack's Interrupt for DM1105 chip 16.03.2008 */
unsigned int intsts = inb(dm_io_mem(DM1105_INTSTS));
outb(intsts, dm_io_mem(DM1105_INTSTS));
switch (intsts) {
case INTSTS_TSIRQ:
case (INTSTS_TSIRQ | INTSTS_IR):
dm1105dvb->nextwrp = inl(dm_io_mem(DM1105_WRP)) -
inl(dm_io_mem(DM1105_STADR));
schedule_work(&dm1105dvb->work);
break;
case INTSTS_IR:
command = inl(dm_io_mem(DM1105_IRCODE));
if (ir_debug)
printk("dm1105: received byte 0x%04x\n", command);
dm1105dvb->ir.ir_command = command;
dm1105dvb->ir.ir_command = inl(dm_io_mem(DM1105_IRCODE));
tasklet_schedule(&dm1105dvb->ir.ir_tasklet);
break;
}
return IRQ_HANDLED;
return IRQ_HANDLED;
}
/* register with input layer */
......@@ -710,7 +717,7 @@ static int __devinit dm1105_probe(struct pci_dev *pdev,
dm1105dvb = kzalloc(sizeof(struct dm1105dvb), GFP_KERNEL);
if (!dm1105dvb)
goto out;
return -ENOMEM;
dm1105dvb->pdev = pdev;
dm1105dvb->buffer_size = 5 * DM1105_DMA_BYTES;
......@@ -740,13 +747,9 @@ static int __devinit dm1105_probe(struct pci_dev *pdev,
spin_lock_init(&dm1105dvb->lock);
pci_set_drvdata(pdev, dm1105dvb);
ret = request_irq(pdev->irq, dm1105dvb_irq, IRQF_SHARED, DRIVER_NAME, dm1105dvb);
if (ret < 0)
goto err_pci_iounmap;
ret = dm1105dvb_hw_init(dm1105dvb);
if (ret < 0)
goto err_free_irq;
goto err_pci_iounmap;
/* i2c */
i2c_set_adapdata(&dm1105dvb->i2c_adap, dm1105dvb);
......@@ -813,8 +816,15 @@ static int __devinit dm1105_probe(struct pci_dev *pdev,
dvb_net_init(dvb_adapter, &dm1105dvb->dvbnet, dmx);
dm1105_ir_init(dm1105dvb);
out:
return ret;
INIT_WORK(&dm1105dvb->work, dm1105_dmx_buffer);
ret = request_irq(pdev->irq, dm1105dvb_irq, IRQF_SHARED,
DRIVER_NAME, dm1105dvb);
if (ret < 0)
goto err_free_irq;
return 0;
err_disconnect_frontend:
dmx->disconnect_frontend(dmx);
......@@ -843,7 +853,7 @@ static int __devinit dm1105_probe(struct pci_dev *pdev,
err_kfree:
pci_set_drvdata(pdev, NULL);
kfree(dm1105dvb);
goto out;
return ret;
}
static void __devexit dm1105_remove(struct pci_dev *pdev)
......
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