msm_11ad: Add 11ad platform driver

Platform driver used to handle msm specific platform
requirement for 11ad chipset connected to msm platform
Takes care of platform support like:

- power switch through dedicated GPIO
- bus frequency voting
- SMMU attachment

This is a snapshot of commit Iee67284b71fab87c2b4a002d7e67d24ef83a9ac9
("Revert "msm_11ad: keep rf_clk3 on during wil6210 activity"").

Change-Id: I3d19fe54197c48b9d846b32c619bf5f2a14dbf5b
CRs-Fixed: 2143032
Signed-off-by: Alexei Avshalom Lazar <ailizaro@codeaurora.org>

Documentation/devicetree/bindings/arm/msm/wil6210.txt

@@ -0,0 +1,63 @@
+wil6210 - Qualcomm Technologies Inc. 802.11ad Wireless Driver
+
+wil6210 driver is responsible for managing 802.11ad chipset
+connected to MSM over PCIe interface.
+
+The platform data is needed in order to perform proper
+bus-scaling and SMMU initialization by the driver.
+
+Required properties:
+
+- compatible: "qcom,wil6210"
+- qcom,smmu-support: Boolean flag indicating whether PCIe has SMMU support
+- qcom,smmu-s1-en: Boolean flag indicating whether SMMU stage1 should be enabled
+- qcom,smmu-fast-map: Boolean flag indicating whether SMMU fast mapping should be enabled
+- qcom,smmu-coherent: Boolean flag indicating SMMU dma and page table coherency
+- qcom,smmu-mapping: specifies the base address and size of SMMU space
+- qcom,pcie-parent: phandle for the PCIe root complex to which 11ad card is connected
+- Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for
+  the below optional properties:
+	- qcom,msm-bus,name
+	- qcom,msm-bus,num-cases
+	- qcom,msm-bus,num-paths
+	- qcom,msm-bus,vectors-KBps
+
+Optional properties:
+- qcom,sleep-clk-en: GPIO for sleep clock used for low power modes by 11ad card
+- qcom,wigig-en: Enable GPIO connected to 11ad card
+- qcom,use-ext-supply: Boolean flag to indicate if 11ad SIP uses external power supply
+- vdd-supply: phandle to 11ad VDD regulator node
+- vddio-supply: phandle to 11ad VDDIO regulator node
+- qcom,use-ext-clocks: Boolean flag to indicate if 11ad SIP uses external clocks
+- clocks	    : List of phandle and clock specifier pairs
+- clock-names       : List of clock input name strings sorted in the same
+		      order as the clocks property.
+- qcom,keep-radio-on-during-sleep: Boolean flag to indicate if to suspend to d3hot
+				   instead of turning off the device
+
+Example:
+	wil6210: qcom,wil6210 {
+		compatible = "qcom,wil6210";
+		qcom,smmu-support;
+		qcom,smmu-s1-en;
+		qcom,smmu-fast-map;
+		qcom,smmu-coherent;
+		qcom,smmu-mapping = <0x20000000 0xe0000000>;
+		qcom,pcie-parent = <&pcie1>;
+		qcom,wigig-en = <&tlmm 94 0>;
+		qcom,msm-bus,name = "wil6210";
+		qcom,msm-bus,num-cases = <2>;
+		qcom,msm-bus,num-paths = <1>;
+		qcom,msm-bus,vectors-KBps =
+			<100 512 0 0>,
+			<100 512 600000 800000>; /* ~4.6Gbps (MCS12) */
+		qcom,use-ext-supply;
+		vdd-supply= <&pm8998_s7>;
+		vddio-supply= <&pm8998_s5>;
+		qcom,use-ext-clocks;
+		clocks = <&clock_gcc clk_rf_clk3>,
+			 <&clock_gcc clk_rf_clk3_pin>;
+		clock-names = "rf_clk3_clk", "rf_clk3_pin_clk";
+		qcom,keep-radio-on-during-sleep;
+	};
+

drivers/platform/msm/Kconfig

@@ -147,4 +147,16 @@ config IPA_UT
 	  The user interface to run and control the tests is debugfs file
 	  system.
 
+config MSM_11AD
+	tristate "Platform driver for 11ad chip"
+	depends on PCI
+	depends on PCI_MSM
+	default n
+	---help---
+	  This module adds required platform support for wireless adapter based on
+	  Qualcomm Technologies, Inc. 11ad chip, integrated into MSM platform
+
+	  If you choose to build it as a module, it will be called
+	  msm_11ad_proxy.
+
 endmenu

drivers/platform/msm/Makefile

@@ -9,3 +9,4 @@ obj-$(CONFIG_USB_BAM) += usb_bam.o
 obj-$(CONFIG_GSI) += gsi/
 obj-$(CONFIG_IPA) += ipa/
 obj-$(CONFIG_IPA3) += ipa/
+obj-$(CONFIG_MSM_11AD) += msm_11ad/

drivers/platform/msm/msm_11ad/Makefile

@@ -0,0 +1,9 @@
+obj-$(CONFIG_MSM_11AD) += msm_11ad_proxy.o
+
+msm_11ad_proxy-y := msm_11ad.o
+subdir-ccflags-y += -D__CHECK_ENDIAN__
+
+# need to locate wil_platform.h
+WIL_11AD_PATH = drivers/net/wireless/ath/wil6210
+subdir-ccflags-y += -I$(WIL_11AD_PATH)
+

drivers/platform/msm/msm_11ad/msm_11ad.h

@@ -0,0 +1,40 @@
+/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#ifndef __MSM_11AD_H__
+#define __MSM_11AD_H__
+
+struct device;
+struct wil_platform_ops;
+struct wil_platform_rops;
+
+/*	msm_11ad_dev_init - call when binding to device, during probe()
+ *	@dev:	device structure of pci device
+ *	@ops:	pointer to operations supported by platform driver
+ *		Will be filled by this function call
+ *	@rops:	pointer to callback functions provided by wil device driver.
+ *		the platform driver copies the structure contents to its
+ *		internal storage. May be NULL if device driver does not
+ *		support rops.
+ *	@wil_handle:	context for wil device driver, will be provided
+ *			when platform driver invokes any of the callback
+ *			functions in rops. May be NULL if rops is also NULL
+ */
+void *msm_11ad_dev_init(struct device *dev, struct wil_platform_ops *ops,
+			const struct wil_platform_rops *rops, void *wil_handle);
+
+/* call on insmod */
+int msm_11ad_modinit(void);
+
+/* call on rmmod */
+void msm_11ad_modexit(void);
+
+#endif /* __MSM_11AD_H__ */