diff options
author | Andy Walls <awalls@md.metrocast.net> | 2010-07-19 01:19:43 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-08 23:42:55 -0300 |
commit | dbe83a3b921328e12b2abe894fc692afba293d7f (patch) | |
tree | e13443d29b6b929a61584b06dec5f3eff84e2111 /drivers/media/video/cx23885/cx23885-core.c | |
parent | 98d109f90fc02ce8baf1c2471ffcf8d66fb0d8e6 (diff) | |
download | op-kernel-dev-dbe83a3b921328e12b2abe894fc692afba293d7f.zip op-kernel-dev-dbe83a3b921328e12b2abe894fc692afba293d7f.tar.gz |
V4L/DVB: cx23885: Protect PCI interrupt mask manipulations with a spinlock
This patch encapsulates access to the PCI_INT_MSK register and
dev->pci_irqmask variable and protects them with a spinlock.
This is needed because both the hard IRQ handler and a workhandler
will need to manipulate the mask to disable the AV_CORE interrupt.
Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-core.c')
-rw-r--r-- | drivers/media/video/cx23885/cx23885-core.c | 94 |
1 files changed, 87 insertions, 7 deletions
diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c index 93e7afb..0765abf 100644 --- a/drivers/media/video/cx23885/cx23885-core.c +++ b/drivers/media/video/cx23885/cx23885-core.c @@ -299,6 +299,83 @@ static struct sram_channel cx23887_sram_channels[] = { }, }; +void cx23885_irq_add(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + dev->pci_irqmask |= mask; + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +void cx23885_irq_add_enable(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + dev->pci_irqmask |= mask; + cx_set(PCI_INT_MSK, mask); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +void cx23885_irq_enable(struct cx23885_dev *dev, u32 mask) +{ + u32 v; + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + v = mask & dev->pci_irqmask; + if (v) + cx_set(PCI_INT_MSK, v); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +static inline void cx23885_irq_enable_all(struct cx23885_dev *dev) +{ + cx23885_irq_enable(dev, 0xffffffff); +} + +void cx23885_irq_disable(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + cx_clear(PCI_INT_MSK, mask); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +static inline void cx23885_irq_disable_all(struct cx23885_dev *dev) +{ + cx23885_irq_disable(dev, 0xffffffff); +} + +void cx23885_irq_remove(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + dev->pci_irqmask &= ~mask; + cx_clear(PCI_INT_MSK, mask); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +static u32 cx23885_irq_get_mask(struct cx23885_dev *dev) +{ + u32 v; + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + v = cx_read(PCI_INT_MSK); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); + return v; +} + static int cx23885_risc_decode(u32 risc) { static char *instr[16] = { @@ -548,7 +625,7 @@ static void cx23885_shutdown(struct cx23885_dev *dev) cx_write(UART_CTL, 0); /* Disable Interrupts */ - cx_write(PCI_INT_MSK, 0); + cx23885_irq_disable_all(dev); cx_write(VID_A_INT_MSK, 0); cx_write(VID_B_INT_MSK, 0); cx_write(VID_C_INT_MSK, 0); @@ -774,6 +851,8 @@ static int cx23885_dev_setup(struct cx23885_dev *dev) { int i; + spin_lock_init(&dev->pci_irqmask_lock); + mutex_init(&dev->lock); mutex_init(&dev->gpio_lock); @@ -820,9 +899,9 @@ static int cx23885_dev_setup(struct cx23885_dev *dev) dev->pci_bus = dev->pci->bus->number; dev->pci_slot = PCI_SLOT(dev->pci->devfn); - dev->pci_irqmask = 0x001f00; + cx23885_irq_add(dev, 0x001f00); if (cx23885_boards[dev->board].cimax > 0) - dev->pci_irqmask |= 0x01800000; /* for CiMaxes */ + cx23885_irq_add(dev, 0x01800000); /* for CiMaxes */ /* External Master 1 Bus */ dev->i2c_bus[0].nr = 0; @@ -1156,7 +1235,7 @@ static void cx23885_tsport_reg_dump(struct cx23885_tsport *port) dprintk(1, "%s() DEV_CNTRL2 0x%08X\n", __func__, cx_read(DEV_CNTRL2)); dprintk(1, "%s() PCI_INT_MSK 0x%08X\n", __func__, - cx_read(PCI_INT_MSK)); + cx23885_irq_get_mask(dev)); dprintk(1, "%s() AUD_INT_INT_MSK 0x%08X\n", __func__, cx_read(AUDIO_INT_INT_MSK)); dprintk(1, "%s() AUD_INT_DMA_CTL 0x%08X\n", __func__, @@ -1292,7 +1371,8 @@ static int cx23885_start_dma(struct cx23885_tsport *port, dprintk(1, "%s() enabling TS int's and DMA\n", __func__); cx_set(port->reg_ts_int_msk, port->ts_int_msk_val); cx_set(port->reg_dma_ctl, port->dma_ctl_val); - cx_set(PCI_INT_MSK, dev->pci_irqmask | port->pci_irqmask); + cx23885_irq_add(dev, port->pci_irqmask); + cx23885_irq_enable_all(dev); break; default: BUG(); @@ -1653,7 +1733,7 @@ static irqreturn_t cx23885_irq(int irq, void *dev_id) bool subdev_handled; pci_status = cx_read(PCI_INT_STAT); - pci_mask = cx_read(PCI_INT_MSK); + pci_mask = cx23885_irq_get_mask(dev); vida_status = cx_read(VID_A_INT_STAT); vida_mask = cx_read(VID_A_INT_MSK); ts1_status = cx_read(VID_B_INT_STAT); @@ -1981,7 +2061,7 @@ static int __devinit cx23885_initdev(struct pci_dev *pci_dev, switch (dev->board) { case CX23885_BOARD_NETUP_DUAL_DVBS2_CI: - cx_set(PCI_INT_MSK, 0x01800000); /* for NetUP */ + cx23885_irq_add_enable(dev, 0x01800000); /* for NetUP */ break; } |