linux-kernel - [PATCH 1/4] firmware: xilinx: Add afi ioctl support

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Message-ID: <20220824035542.706433-2-nava.kishore.manne@amd.com>
Date:   Wed, 24 Aug 2022 09:25:39 +0530
From:   Nava kishore Manne <nava.kishore.manne@....com>
To:     <git@....com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <michal.simek@...inx.com>,
        <nava.kishore.manne@....com>, <mdf@...nel.org>, <hao.wu@...el.com>,
        <yilun.xu@...el.com>, <trix@...hat.com>, <p.zabel@...gutronix.de>,
        <gregkh@...uxfoundation.org>, <ronak.jain@...inx.com>,
        <rajan.vaja@...inx.com>, <abhyuday.godhasara@...inx.com>,
        <piyush.mehta@...inx.com>,
        <lakshmi.sai.krishna.potthuri@...inx.com>,
        <harsha.harsha@...inx.com>, <linus.walleij@...aro.org>,
        <nava.manne@...inx.com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-fpga@...r.kernel.org>
Subject: [PATCH 1/4] firmware: xilinx: Add afi ioctl support

Adds afi ioctl to support dynamic PS-PL bus width settings.

Signed-off-by: Nava kishore Manne <nava.kishore.manne@....com>
---
 drivers/firmware/xilinx/zynqmp.c     | 14 +++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 36 ++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index d1f652802181..cbd84c96a66a 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -843,6 +843,20 @@ int zynqmp_pm_read_pggs(u32 index, u32 *value)
 }
 EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs);
 
+/**
+ * zynqmp_pm_afi() - PM API for setting the PS-PL bus width
+ * @config_id:	Register index value
+ * @bus_width:	Afi interface bus width value.
+ *
+ * Return:	Returns status, either success or error+reason
+ */
+int zynqmp_pm_afi(u32 config_id, u32 bus_width)
+{
+	return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_AFI,
+				   config_id, bus_width, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_afi);
+
 /**
  * zynqmp_pm_set_boot_health_status() - PM API for setting healthy boot status
  * @value:	Status value to be written
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 9f50dacbf7d6..7d0d98303acc 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -78,6 +78,16 @@
 #define EVENT_ERROR_PSM_ERR1	(0x28108000U)
 #define EVENT_ERROR_PSM_ERR2	(0x2810C000U)
 
+#define AFIFM_BUS_WIDTH_128_CONFIG_VAL	0x0U
+#define AFIFM_BUS_WIDTH_64_CONFIG_VAL	0x1U
+#define AFIFM_BUS_WIDTH_32_CONFIG_VAL	0x2U
+
+#define AFIFS_SS0_SS2_BUS_WIDTH_128_CONFIG_VAL	0x200U
+#define AFIFS_SS0_SS2_BUS_WIDTH_64_CONFIG_VAL	0x100U
+#define AFIFS_SS1_BUS_WIDTH_128_CONFIG_VAL	0x800U
+#define AFIFS_SS1_BUS_WIDTH_64_CONFIG_VAL	0x400U
+#define AFIFS_SS_BUS_WIDTH_32_CONFIG_VAL	0x0U
+
 enum pm_api_cb_id {
 	PM_INIT_SUSPEND_CB = 30,
 	PM_ACKNOWLEDGE_CB = 31,
@@ -147,6 +157,7 @@ enum pm_ioctl_id {
 	IOCTL_READ_PGGS = 15,
 	/* Set healthy bit value */
 	IOCTL_SET_BOOT_HEALTH_STATUS = 17,
+	IOCTL_AFI = 18,
 	IOCTL_OSPI_MUX_SELECT = 21,
 	/* Register SGI to ATF */
 	IOCTL_REGISTER_SGI = 25,
@@ -155,6 +166,25 @@ enum pm_ioctl_id {
 	IOCTL_GET_FEATURE_CONFIG = 27,
 };
 
+enum pm_afi_config_id {
+	AFIFM0_RDCTRL = 0,
+	AFIFM0_WRCTRL = 1,
+	AFIFM1_RDCTRL = 2,
+	AFIFM1_WRCTRL = 3,
+	AFIFM2_RDCTRL = 4,
+	AFIFM2_WRCTRL = 5,
+	AFIFM3_RDCTRL = 6,
+	AFIFM3_WRCTRL = 7,
+	AFIFM4_RDCTRL = 8,
+	AFIFM4_WRCTRL = 9,
+	AFIFM5_RDCTRL = 10,
+	AFIFM5_WRCTRL = 11,
+	AFIFM6_RDCTRL = 12,
+	AFIFM6_WRCTRL = 13,
+	AFIFS = 14,
+	AFIFS_SS2 = 15,
+};
+
 enum pm_query_id {
 	PM_QID_INVALID = 0,
 	PM_QID_CLOCK_GET_NAME = 1,
@@ -475,6 +505,7 @@ int zynqmp_pm_is_function_supported(const u32 api_id, const u32 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_register_sgi(u32 sgi_num, u32 reset);
+int zynqmp_pm_afi(u32 config_id, u32 bus_width);
 #else
 static inline int zynqmp_pm_get_api_version(u32 *version)
 {
@@ -745,6 +776,11 @@ static inline int zynqmp_pm_register_sgi(u32 sgi_num, u32 reset)
 {
 	return -ENODEV;
 }
+
+static inline int zynqmp_pm_afi(u32 config_id, u32 bus_width)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif /* __FIRMWARE_ZYNQMP_H__ */
-- 
2.25.1