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authorAndy Walls <awalls@md.metrocast.net>2010-07-19 01:19:43 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-08-08 23:42:55 -0300
commitdbe83a3b921328e12b2abe894fc692afba293d7f (patch)
treee13443d29b6b929a61584b06dec5f3eff84e2111
parent98d109f90fc02ce8baf1c2471ffcf8d66fb0d8e6 (diff)
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>
-rw-r--r--drivers/media/video/cx23885/cx23885-cards.c17
-rw-r--r--drivers/media/video/cx23885/cx23885-core.c94
-rw-r--r--drivers/media/video/cx23885/cx23885-vbi.c2
-rw-r--r--drivers/media/video/cx23885/cx23885-video.c7
-rw-r--r--drivers/media/video/cx23885/cx23885.h5
5 files changed, 103 insertions, 22 deletions
diff --git a/drivers/media/video/cx23885/cx23885-cards.c b/drivers/media/video/cx23885/cx23885-cards.c
index 294a7530caf7..d72b48ef940e 100644
--- a/drivers/media/video/cx23885/cx23885-cards.c
+++ b/drivers/media/video/cx23885/cx23885-cards.c
@@ -1012,7 +1012,6 @@ int cx23885_ir_init(struct cx23885_dev *dev)
dev->sd_ir = cx23885_find_hw(dev, CX23885_HW_888_IR);
v4l2_subdev_call(dev->sd_cx25840, core, s_io_pin_config,
ir_rxtx_pin_cfg_count, ir_rxtx_pin_cfg);
- dev->pci_irqmask |= PCI_MSK_IR;
/*
* For these boards we need to invert the Tx output via the
* IR controller to have the LED off while idle
@@ -1033,7 +1032,6 @@ int cx23885_ir_init(struct cx23885_dev *dev)
}
v4l2_subdev_call(dev->sd_cx25840, core, s_io_pin_config,
ir_rx_pin_cfg_count, ir_rx_pin_cfg);
- dev->pci_irqmask |= PCI_MSK_AV_CORE;
break;
case CX23885_BOARD_HAUPPAUGE_HVR1250:
dev->sd_ir = cx23885_find_hw(dev, CX23885_HW_AV_CORE);
@@ -1043,7 +1041,6 @@ int cx23885_ir_init(struct cx23885_dev *dev)
}
v4l2_subdev_call(dev->sd_cx25840, core, s_io_pin_config,
ir_rxtx_pin_cfg_count, ir_rxtx_pin_cfg);
- dev->pci_irqmask |= PCI_MSK_AV_CORE;
break;
case CX23885_BOARD_DVICO_FUSIONHDTV_DVB_T_DUAL_EXP:
request_module("ir-kbd-i2c");
@@ -1058,15 +1055,13 @@ void cx23885_ir_fini(struct cx23885_dev *dev)
switch (dev->board) {
case CX23885_BOARD_HAUPPAUGE_HVR1850:
case CX23885_BOARD_HAUPPAUGE_HVR1290:
- dev->pci_irqmask &= ~PCI_MSK_IR;
- cx_clear(PCI_INT_MSK, PCI_MSK_IR);
+ cx23885_irq_remove(dev, PCI_MSK_IR);
cx23888_ir_remove(dev);
dev->sd_ir = NULL;
break;
case CX23885_BOARD_TEVII_S470:
case CX23885_BOARD_HAUPPAUGE_HVR1250:
- dev->pci_irqmask &= ~PCI_MSK_AV_CORE;
- cx_clear(PCI_INT_MSK, PCI_MSK_AV_CORE);
+ cx23885_irq_remove(dev, PCI_MSK_AV_CORE);
/* sd_ir is a duplicate pointer to the AV Core, just clear it */
dev->sd_ir = NULL;
break;
@@ -1078,13 +1073,13 @@ void cx23885_ir_pci_int_enable(struct cx23885_dev *dev)
switch (dev->board) {
case CX23885_BOARD_HAUPPAUGE_HVR1850:
case CX23885_BOARD_HAUPPAUGE_HVR1290:
- if (dev->sd_ir && (dev->pci_irqmask & PCI_MSK_IR))
- cx_set(PCI_INT_MSK, PCI_MSK_IR);
+ if (dev->sd_ir)
+ cx23885_irq_add_enable(dev, PCI_MSK_IR);
break;
case CX23885_BOARD_TEVII_S470:
case CX23885_BOARD_HAUPPAUGE_HVR1250:
- if (dev->sd_ir && (dev->pci_irqmask & PCI_MSK_AV_CORE))
- cx_set(PCI_INT_MSK, PCI_MSK_AV_CORE);
+ if (dev->sd_ir)
+ cx23885_irq_add_enable(dev, PCI_MSK_AV_CORE);
break;
}
}
diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c
index 93e7afb98889..0765abf4e42e 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;
}
diff --git a/drivers/media/video/cx23885/cx23885-vbi.c b/drivers/media/video/cx23885/cx23885-vbi.c
index 708a8c766d1a..c0b60382ad13 100644
--- a/drivers/media/video/cx23885/cx23885-vbi.c
+++ b/drivers/media/video/cx23885/cx23885-vbi.c
@@ -74,7 +74,7 @@ static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
q->count = 1;
/* enable irqs */
- cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
+ cx23885_irq_add_enable(dev, 0x01);
cx_set(VID_A_INT_MSK, 0x000022);
/* start dma */
diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c
index 25194553c529..da66e5f8d91d 100644
--- a/drivers/media/video/cx23885/cx23885-video.c
+++ b/drivers/media/video/cx23885/cx23885-video.c
@@ -441,7 +441,7 @@ static int cx23885_start_video_dma(struct cx23885_dev *dev,
q->count = 1;
/* enable irq */
- cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01);
+ cx23885_irq_add_enable(dev, 0x01);
cx_set(VID_A_INT_MSK, 0x000011);
/* start dma */
@@ -1465,7 +1465,7 @@ static const struct v4l2_file_operations radio_fops = {
void cx23885_video_unregister(struct cx23885_dev *dev)
{
dprintk(1, "%s()\n", __func__);
- cx_clear(PCI_INT_MSK, 1);
+ cx23885_irq_remove(dev, 0x01);
if (dev->video_dev) {
if (video_is_registered(dev->video_dev))
@@ -1502,7 +1502,8 @@ int cx23885_video_register(struct cx23885_dev *dev)
VID_A_DMA_CTL, 0x11, 0x00);
/* Don't enable VBI yet */
- cx_set(PCI_INT_MSK, 1);
+
+ cx23885_irq_add_enable(dev, 0x01);
if (TUNER_ABSENT != dev->tuner_type) {
struct v4l2_subdev *sd = NULL;
diff --git a/drivers/media/video/cx23885/cx23885.h b/drivers/media/video/cx23885/cx23885.h
index 460f430d028f..5bf6ed09c970 100644
--- a/drivers/media/video/cx23885/cx23885.h
+++ b/drivers/media/video/cx23885/cx23885.h
@@ -325,6 +325,7 @@ struct cx23885_dev {
u32 __iomem *lmmio;
u8 __iomem *bmmio;
int pci_irqmask;
+ spinlock_t pci_irqmask_lock; /* protects mask reg too */
int hwrevision;
/* This valud is board specific and is used to configure the
@@ -485,6 +486,10 @@ extern u32 cx23885_gpio_get(struct cx23885_dev *dev, u32 mask);
extern void cx23885_gpio_enable(struct cx23885_dev *dev, u32 mask,
int asoutput);
+extern void cx23885_irq_add_enable(struct cx23885_dev *dev, u32 mask);
+extern void cx23885_irq_enable(struct cx23885_dev *dev, u32 mask);
+extern void cx23885_irq_disable(struct cx23885_dev *dev, u32 mask);
+extern void cx23885_irq_remove(struct cx23885_dev *dev, u32 mask);
/* ----------------------------------------------------------- */
/* cx23885-cards.c */

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