[PATCH v3 2/4] firmware: xilinx: Add zynqmp IOCTL API for device control

From: Jolly Shah
Date: Wed Sep 26 2018 - 14:16:31 EST


From: Rajan Vaja <rajan.vaja@xxxxxxxxxx>

Add ZynqMP firmware IOCTL API to control and configure
devices like PLLs, SD, Gem, etc.

Signed-off-by: Rajan Vaja <rajan.vaja@xxxxxxxxxx>
Signed-off-by: Jolly Shah <jollys@xxxxxxxxxx>
---
drivers/firmware/xilinx/zynqmp.c | 43 ++++++++++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 4 +++-
2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 84b3fd2..671a37a 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -428,6 +428,48 @@ static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
return ret;
}

+/**
+ * zynqmp_is_valid_ioctl() - Check whether IOCTL ID is valid or not
+ * @ioctl_id: IOCTL ID
+ *
+ * Return: 0 if IOCTL is valid, else -EINVAL
+ */
+static inline int zynqmp_is_valid_ioctl(u32 ioctl_id)
+{
+ if (ioctl_id == IOCTL_SET_PLL_FRAC_MODE ||
+ ioctl_id == IOCTL_GET_PLL_FRAC_MODE ||
+ ioctl_id == IOCTL_SET_PLL_FRAC_DATA ||
+ ioctl_id == IOCTL_GET_PLL_FRAC_DATA)
+ return 0;
+
+ return -EINVAL;
+}
+
+/**
+ * zynqmp_pm_ioctl() - PM IOCTL API for device control and configs
+ * @node_id: Node ID of the device
+ * @ioctl_id: ID of the requested IOCTL
+ * @arg1: Argument 1 to requested IOCTL call
+ * @arg2: Argument 2 to requested IOCTL call
+ * @out: Returned output value
+ *
+ * This function calls IOCTL to firmware for device control and configuration.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
+ u32 *out)
+{
+ int ret;
+
+ ret = zynqmp_is_valid_ioctl(ioctl_id);
+ if (ret)
+ return ret;
+
+ return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, ioctl_id,
+ arg1, arg2, out);
+}
+
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.query_data = zynqmp_pm_query_data,
@@ -440,6 +482,7 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.clock_getrate = zynqmp_pm_clock_getrate,
.clock_setparent = zynqmp_pm_clock_setparent,
.clock_getparent = zynqmp_pm_clock_getparent,
+ .ioctl = zynqmp_pm_ioctl,
};

/**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 015e130..7a9db08 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -34,7 +34,8 @@

enum pm_api_id {
PM_GET_API_VERSION = 1,
- PM_QUERY_DATA = 35,
+ PM_IOCTL = 34,
+ PM_QUERY_DATA,
PM_CLOCK_ENABLE,
PM_CLOCK_DISABLE,
PM_CLOCK_GETSTATE,
@@ -99,6 +100,7 @@ struct zynqmp_eemi_ops {
int (*clock_getrate)(u32 clock_id, u64 *rate);
int (*clock_setparent)(u32 clock_id, u32 parent_id);
int (*clock_getparent)(u32 clock_id, u32 *parent_id);
+ int (*ioctl)(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2, u32 *out);
};

#if IS_REACHABLE(CONFIG_ARCH_ZYNQMP)
--
2.7.4