From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
To: linux-media@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Subject: [PATCH] v4l: rcar-fcp: Read IP version register at probe time
Date: Sat, 8 Jun 2019 15:53:31 +0300 [thread overview]
Message-ID: <20190608125331.29146-1-laurent.pinchart+renesas@ideasonboard.com> (raw)
This helps identifying the IP core version, for debugging purpose only
for now.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
drivers/media/platform/rcar-fcp.c | 43 +++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/drivers/media/platform/rcar-fcp.c b/drivers/media/platform/rcar-fcp.c
index 43c78620c9d8..e9b01965052d 100644
--- a/drivers/media/platform/rcar-fcp.c
+++ b/drivers/media/platform/rcar-fcp.c
@@ -8,6 +8,7 @@
*/
#include <linux/device.h>
+#include <linux/io.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
@@ -21,11 +22,38 @@
struct rcar_fcp_device {
struct list_head list;
struct device *dev;
+ void __iomem *iomem;
};
static LIST_HEAD(fcp_devices);
static DEFINE_MUTEX(fcp_lock);
+#define FCP_VCR 0x0000
+#define FCP_VCR_CATEGORY_MASK (0xff << 8)
+#define FCP_VCR_CATEGORY_SHIFT 8
+#define FCP_VCR_REVISION_MASK (0xff << 0)
+#define FCP_VCR_REVISION_SHIFT 0
+
+#define FCP_CFG0 0x0004
+#define FCP_RST 0x0010
+#define FCP_STA 0x0018
+#define FCP_TL_CTRL 0x0070
+#define FCP_PICINFO1 0x00c4
+#define FCP_BA_ANC_Y0 0x0100
+#define FCP_BA_ANC_Y1 0x0104
+#define FCP_BA_ANC_Y2 0x0108
+#define FCP_BA_ANC_C 0x010c
+#define FCP_BA_REF_Y0 0x0110
+#define FCP_BA_REF_Y1 0x0114
+#define FCP_BA_REF_Y2 0x0118
+#define FCP_BA_REF_C 0x011c
+
+
+static inline u32 rcar_fcp_read(struct rcar_fcp_device *fcp, u32 reg)
+{
+ return ioread32(fcp->iomem + reg);
+}
+
/* -----------------------------------------------------------------------------
* Public API
*/
@@ -129,6 +157,8 @@ EXPORT_SYMBOL_GPL(rcar_fcp_disable);
static int rcar_fcp_probe(struct platform_device *pdev)
{
struct rcar_fcp_device *fcp;
+ struct resource *mem;
+ u32 version;
fcp = devm_kzalloc(&pdev->dev, sizeof(*fcp), GFP_KERNEL);
if (fcp == NULL)
@@ -138,6 +168,19 @@ static int rcar_fcp_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ fcp->iomem = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(fcp->iomem))
+ return PTR_ERR(fcp->iomem);
+
+ pm_runtime_get_sync(&pdev->dev);
+ version = rcar_fcp_read(fcp, FCP_VCR);
+ pm_runtime_put(&pdev->dev);
+
+ dev_dbg(&pdev->dev, "FCP category %u revision %u\n",
+ (version & FCP_VCR_CATEGORY_MASK) >> FCP_VCR_CATEGORY_SHIFT,
+ (version & FCP_VCR_REVISION_MASK) >> FCP_VCR_REVISION_SHIFT);
+
mutex_lock(&fcp_lock);
list_add_tail(&fcp->list, &fcp_devices);
mutex_unlock(&fcp_lock);
--
Regards,
Laurent Pinchart
next reply other threads:[~2019-06-08 12:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-08 12:53 Laurent Pinchart [this message]
2019-06-09 8:06 ` [PATCH] v4l: rcar-fcp: Read IP version register at probe time Geert Uytterhoeven
2019-06-09 10:08 ` Laurent Pinchart
2019-06-09 11:51 ` Geert Uytterhoeven
2019-06-09 12:37 ` Laurent Pinchart
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