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Subject[PATCH v2 09/11] firmware: xilinx: Add SDIO Tap Delay APIs
Date
Add APIs for setting SDIO Tap Delays on ZynqMP platform.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
drivers/firmware/xilinx/zynqmp.c | 48 ++++++++++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 15 ++++++++++-
2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index fd3d837..b81f1be 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -664,6 +664,52 @@ static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
qos, ack, NULL);
}

+/**
+ * zynqmp_pm_sdio_out_setphase() - PM call to set clock output delays for SD
+ * @device_id: Device ID of the SD controller
+ * @tap_delay: Tap Delay value for output clock
+ *
+ * This API function is to be used for setting the clock output delays for SD
+ * clock.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_sdio_out_setphase(u32 device_id, u8 tap_delay)
+{
+ u32 node_id = (!device_id) ? NODE_SD_0 : NODE_SD_1;
+ int ret;
+
+ ret = zynqmp_pm_ioctl(node_id, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_OUTPUT, tap_delay, NULL);
+ if (ret)
+ pr_err("Error setting Output Tap Delay\n");
+
+ return ret;
+}
+
+/**
+ * zynqmp_pm_sdio_in_setphase() - PM call to set clock input delays for SD
+ * @device_id: Device ID of the SD controller
+ * @tap_delay: Tap Delay value for input clock
+ *
+ * This API function is to be used for setting the clock input delays for SD
+ * clock.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_sdio_in_setphase(u32 device_id, u8 tap_delay)
+{
+ u32 node_id = (!device_id) ? NODE_SD_0 : NODE_SD_1;
+ int ret;
+
+ ret = zynqmp_pm_ioctl(node_id, IOCTL_SET_SD_TAPDELAY,
+ PM_TAPDELAY_INPUT, tap_delay, NULL);
+ if (ret)
+ pr_err("Error setting Input Tap Delay\n");
+
+ return ret;
+}
+
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.get_chipid = zynqmp_pm_get_chipid,
@@ -687,6 +733,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.set_requirement = zynqmp_pm_set_requirement,
.fpga_load = zynqmp_pm_fpga_load,
.fpga_get_status = zynqmp_pm_fpga_get_status,
+ .sdio_out_setphase = zynqmp_pm_sdio_out_setphase,
+ .sdio_in_setphase = zynqmp_pm_sdio_in_setphase,
};

/**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 1262ea6..d9b53e5 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -92,7 +92,8 @@ enum pm_ret_status {
};

enum pm_ioctl_id {
- IOCTL_SET_PLL_FRAC_MODE = 8,
+ IOCTL_SET_SD_TAPDELAY = 7,
+ IOCTL_SET_PLL_FRAC_MODE,
IOCTL_GET_PLL_FRAC_MODE,
IOCTL_SET_PLL_FRAC_DATA,
IOCTL_GET_PLL_FRAC_DATA,
@@ -251,6 +252,16 @@ enum zynqmp_pm_request_ack {
ZYNQMP_PM_REQUEST_ACK_NON_BLOCKING,
};

+enum pm_node_id {
+ NODE_SD_0 = 39,
+ NODE_SD_1,
+};
+
+enum tap_delay_type {
+ PM_TAPDELAY_INPUT = 0,
+ PM_TAPDELAY_OUTPUT,
+};
+
/**
* struct zynqmp_pm_query_data - PM query data
* @qid: query ID
@@ -295,6 +306,8 @@ struct zynqmp_eemi_ops {
const u32 capabilities,
const u32 qos,
const enum zynqmp_pm_request_ack ack);
+ int (*sdio_out_setphase)(u32 device_id, u8 tap_delay);
+ int (*sdio_in_setphase)(u32 device_id, u8 tap_delay);
};

int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,
--
2.1.1
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