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From:   Ronak Jain <ronak.jain@xilinx.com>
To:     <michal.simek@xilinx.com>, <linux-kernel@vger.kernel.org>
CC:     <gregkh@linuxfoundation.org>, <corbet@lwn.net>,
        <linux-arm-kernel@lists.infradead.org>, <arnd@arndb.de>,
        <lakshmi.sai.krishna.potthuri@xilinx.com>, <radheys@xilinx.com>,
        <agodhasa@xilinx.com>, Ronak Jain <ronak.jain@xilinx.com>
Subject: [PATCH] firmware: xilinx: add support for sd/usb/gem config
Date:   Fri, 29 Apr 2022 03:16:42 -0700
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Add new APIs in firmware to configure SD/GEM/USB registers. Internally
it calls PM IOCTL for below SD/GEM/USB register configuration:
- SD/EMMC select
- SD slot type
- SD base clock
- SD 8 bit support
- GEM SGMII Mode
- SD fixed config
- GEM fixed config
- USB fixed config

Signed-off-by: Ronak Jain <ronak.jain@xilinx.com>
---
 drivers/firmware/xilinx/zynqmp.c     | 47 ++++++++++++++++++++++++++++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 46 +++++++++++++++++++++++++++++++++++
 2 files changed, 93 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index f21ece56695e..f8a46aad9392 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -1220,6 +1220,53 @@ int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
 }
 
 /**
+ * zynqmp_pm_set_sd_config - PM call to set value of SD config registers
+ * @node:	SD node ID
+ * @config:	The config type of SD registers
+ * @value:	Value to be set
+ *
+ * Return:      Returns 0 on success or error value on failure.
+ */
+int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value)
+{
+	return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_SD_CONFIG,
+				   config, value, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_config);
+
+/**
+ * zynqmp_pm_set_gem_config - PM call to set value of GEM config registers
+ * @node:	GEM node ID
+ * @config:	The config type of GEM registers
+ * @value:	Value to be set
+ *
+ * Return:      Returns 0 on success or error value on failure.
+ */
+int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
+			     u32 value)
+{
+	return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_GEM_CONFIG,
+				   config, value, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_gem_config);
+
+/**
+ * zynqmp_pm_set_usb_config - PM call to set value of USB config registers
+ * @node:	USB node ID
+ * @config:	The config type of USB registers
+ * @value:	Value to be set
+ *
+ * Return:      Returns 0 on success or error value on failure.
+ */
+int zynqmp_pm_set_usb_config(u32 node, enum pm_usb_config_type config,
+			     u32 value)
+{
+	return zynqmp_pm_invoke_fn(PM_IOCTL, node, IOCTL_SET_USB_CONFIG,
+				   config, value, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_usb_config);
+
+/**
  * struct zynqmp_pm_shutdown_scope - Struct for shutdown scope
  * @subtype:	Shutdown subtype
  * @name:	Matching string for scope argument
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 14f00a7672d1..71188af75f1a 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -147,6 +147,10 @@ enum pm_ioctl_id {
 	/* Runtime feature configuration */
 	IOCTL_SET_FEATURE_CONFIG = 26,
 	IOCTL_GET_FEATURE_CONFIG = 27,
+	/* Dynamic SD/GEM/USB configuration */
+	IOCTL_SET_SD_CONFIG = 30,
+	IOCTL_SET_GEM_CONFIG = 31,
+	IOCTL_SET_USB_CONFIG = 32,
 };
 
 enum pm_query_id {
@@ -388,6 +392,22 @@ enum pm_feature_config_id {
 	PM_FEATURE_EXTWDT_VALUE = 4,
 };
 
+enum pm_sd_config_type {
+	SD_CONFIG_EMMC_SEL = 1, /* To set SD_EMMC_SEL in CTRL_REG_SD and SD_SLOTTYPE */
+	SD_CONFIG_BASECLK = 2, /* To set SD_BASECLK in SD_CONFIG_REG1 */
+	SD_CONFIG_8BIT = 3, /* To set SD_8BIT in SD_CONFIG_REG2 */
+	SD_CONFIG_FIXED = 4, /* To set fixed config registers */
+};
+
+enum pm_gem_config_type {
+	GEM_CONFIG_SGMII_MODE = 1, /* To set GEM_SGMII_MODE in GEM_CLK_CTRL register */
+	GEM_CONFIG_FIXED = 2, /* To set fixed config registers */
+};
+
+enum pm_usb_config_type {
+	USB_CONFIG_FIXED = 1, /* To set fixed config registers */
+};
+
 /**
  * struct zynqmp_pm_query_data - PM query data
  * @qid:	query ID
@@ -462,6 +482,11 @@ int zynqmp_pm_register_notifier(const u32 node, const u32 event,
 int zynqmp_pm_feature(const u32 api_id);
 int zynqmp_pm_set_feature_config(enum pm_feature_config_id id, u32 value);
 int zynqmp_pm_get_feature_config(enum pm_feature_config_id id, u32 *payload);
+int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value);
+int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
+			     u32 value);
+int zynqmp_pm_set_usb_config(u32 node, enum pm_usb_config_type config,
+			     u32 value);
 #else
 static inline int zynqmp_pm_get_api_version(u32 *version)
 {
@@ -722,6 +747,27 @@ static inline int zynqmp_pm_get_feature_config(enum pm_feature_config_id id,
 {
 	return -ENODEV;
 }
+
+static inline int zynqmp_pm_set_sd_config(u32 node,
+					  enum pm_sd_config_type config,
+					  u32 value)
+{
+	return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_gem_config(u32 node,
+					   enum pm_gem_config_type config,
+					   u32 value)
+{
+	return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_usb_config(u32 node,
+					   enum pm_usb_config_type config,
+					   u32 value)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif /* __FIRMWARE_ZYNQMP_H__ */
-- 
2.7.4