Add an UIO device for each Flexcard Flexray related trigger. The trigger
devide into:
- Flexray cycle start (CCYS)
- Flexray timer 0 (CCxT0)
- Bus wakeup (WAKE)
The UIO IRQ devices can be used to synchronize an application
with these events.
Signed-off-by: Benedikt Spranger <b.spran...@linutronix.de>
Signed-off-by: Holger Dengler <deng...@linutronix.de>
cc: Lee Jones <lee.jo...@linaro.org>
---
drivers/mfd/flexcard_core.c | 85 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/drivers/mfd/flexcard_core.c b/drivers/mfd/flexcard_core.c
index 55bcfec..fc5b033 100644
--- a/drivers/mfd/flexcard_core.c
+++ b/drivers/mfd/flexcard_core.c
@@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/flexcard.h>
@@ -47,6 +48,46 @@
#define DMA_MIN_FW_MINOR 4
#define DMA_MIN_FW_UPDATE 0
+#define FLEXCARD_IRQ_CC1CCYS_OFF 0
+#define FLEXCARD_IRQ_CC2CCYS_OFF 1
+#define FLEXCARD_IRQ_CC3CCYS_OFF 2
+#define FLEXCARD_IRQ_CC4CCYS_OFF 3
+#define FLEXCARD_IRQ_WAKE4A_OFF 4
+#define FLEXCARD_IRQ_WAKE4B_OFF 5
+#define FLEXCARD_IRQ_WAKE3A_OFF 6
+#define FLEXCARD_IRQ_WAKE3B_OFF 7
+#define FLEXCARD_IRQ_WAKE2A_OFF 8
+#define FLEXCARD_IRQ_WAKE2B_OFF 9
+#define FLEXCARD_IRQ_WAKE1A_OFF 10
+#define FLEXCARD_IRQ_WAKE1B_OFF 11
+#define FLEXCARD_IRQ_CC1T0_OFF 12
+#define FLEXCARD_IRQ_CC2T0_OFF 13
+#define FLEXCARD_IRQ_CC3T0_OFF 14
+#define FLEXCARD_IRQ_CC4T0_OFF 15
+
+#define flexcard_irq_resource(irq_name)
\
+ static struct resource flexcard_irq_res_##irq_name = { \
+ .name = __stringify(fc_irq_##irq_name##_off), \
+ .start = FLEXCARD_IRQ_##irq_name##_OFF, \
+ .end = FLEXCARD_IRQ_##irq_name##_OFF, \
+ .flags = IORESOURCE_IRQ, \
+ }; \
+ \
+ static struct uio_info flexcard_irq_pdata_##irq_name = { \
+ .name = __stringify(irq_name), \
+ .version = "0", \
+ }
+
+#define flexcard_irq_cell(irq_name, irq_id) \
+ { \
+ .id = irq_id, \
+ .name = "uio_pdrv_genirq", \
+ .platform_data = &flexcard_irq_pdata_##irq_name, \
+ .pdata_size = sizeof(flexcard_irq_pdata_##irq_name), \
+ .num_resources = 1, \
+ .resources = &flexcard_irq_res_##irq_name \
+ }
+
static DEFINE_IDA(flexcard_ida);
static struct resource flexcard_dma_res[] = {
@@ -163,6 +204,42 @@ static int flexcard_add_dma(struct flexcard_device *priv)
return 0;
}
+flexcard_irq_resource(CC1CCYS);
+flexcard_irq_resource(CC2CCYS);
+flexcard_irq_resource(CC3CCYS);
+flexcard_irq_resource(CC4CCYS);
+flexcard_irq_resource(WAKE4A);
+flexcard_irq_resource(WAKE4B);
+flexcard_irq_resource(WAKE3A);
+flexcard_irq_resource(WAKE3B);
+flexcard_irq_resource(WAKE2A);
+flexcard_irq_resource(WAKE2B);
+flexcard_irq_resource(WAKE1A);
+flexcard_irq_resource(WAKE1B);
+flexcard_irq_resource(CC1T0);
+flexcard_irq_resource(CC2T0);
+flexcard_irq_resource(CC3T0);
+flexcard_irq_resource(CC4T0);
+
+static struct mfd_cell flexcard_uio_dev[] = {
+ flexcard_irq_cell(CC3CCYS, 0),
+ flexcard_irq_cell(CC4CCYS, 1),
+ flexcard_irq_cell(WAKE4A, 2),
+ flexcard_irq_cell(WAKE4B, 3),
+ flexcard_irq_cell(WAKE3A, 4),
+ flexcard_irq_cell(WAKE3B, 5),
+ flexcard_irq_cell(WAKE2A, 6),
+ flexcard_irq_cell(WAKE2B, 7),
+ flexcard_irq_cell(WAKE1A, 8),
+ flexcard_irq_cell(WAKE1B, 9),
+ flexcard_irq_cell(CC1CCYS, 10),
+ flexcard_irq_cell(CC2CCYS, 11),
+ flexcard_irq_cell(CC1T0, 12),
+ flexcard_irq_cell(CC2T0, 13),
+ flexcard_irq_cell(CC3T0, 14),
+ flexcard_irq_cell(CC4T0, 15),
+};
+
static int flexcard_tiny_can(struct flexcard_device *priv,
int idx, int id, u32 offset)
{
@@ -334,6 +411,14 @@ static int flexcard_probe(struct pci_dev *pdev,
goto out_mfd_dev_remove;
}
+ ret = mfd_add_devices(&pdev->dev, 0, flexcard_uio_dev,
+ ARRAY_SIZE(flexcard_uio_dev),
+ NULL, 0, priv->irq_domain);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to add irq UIO devices: %d", ret);
+ goto out_mfd_dev_remove;
+ }
+
dev_info(&pdev->dev, "HW %02x.%02x.%02x FW %02x.%02x.%02x\n",
hw_ver.ver.maj, hw_ver.ver.min, hw_ver.ver.dev,
fw_ver.ver.maj, fw_ver.ver.min, fw_ver.ver.dev);
--
2.1.4
