Message-ID: <1443245193-8597-4-git-send-email-bjorn.andersson@sonymobile.com>
Date:	Fri, 25 Sep 2015 22:26:32 -0700
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Ohad Ben-Cohen <ohad@...ery.com>
CC:	<linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: [PATCH 3/4] remoteproc: qcom: Introduce WCNSS peripheral image loader

This introduces the peripheral image loader, for loading WCNSS firmware
and boot the core on e.g. MSM8974. The firmware is verified and booted
with the help of the Peripheral Authentication System (PAS) in
TrustZone.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
---

The mdt loader is kept separate as it's used to load the ADSP and VENUS (video
processor) firmware as well.

 drivers/remoteproc/Kconfig           |  11 +
 drivers/remoteproc/Makefile          |   2 +
 drivers/remoteproc/qcom_mdt_loader.c | 213 ++++++++++++
 drivers/remoteproc/qcom_mdt_loader.h |   8 +
 drivers/remoteproc/qcom_wcnss.c      | 615 +++++++++++++++++++++++++++++++++++
 5 files changed, 849 insertions(+)
 create mode 100644 drivers/remoteproc/qcom_mdt_loader.c
 create mode 100644 drivers/remoteproc/qcom_mdt_loader.h
 create mode 100644 drivers/remoteproc/qcom_wcnss.c

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 28c711f0ac6b..f4eb07907851 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -77,4 +77,15 @@ config DA8XX_REMOTEPROC
 	  It's safe to say n here if you're not interested in multimedia
 	  offloading.
 
+config QCOM_MDT_LOADER
+	tristate
+
+config QCOM_WCNSS_PIL
+	tristate "Qualcomm WCNSS Peripheral Image Loader"
+	depends on OF && ARCH_QCOM
+	select REMOTEPROC
+	select QCOM_MDT_LOADER
+	help
+	  Peripherial Image Loader for the WCNSS block.
+
 endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 81b04d1e2e58..beb9a4be7ffd 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -11,3 +11,5 @@ obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
 obj-$(CONFIG_STE_MODEM_RPROC)	 	+= ste_modem_rproc.o
 obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
 obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
+obj-$(CONFIG_QCOM_MDT_LOADER)		+= qcom_mdt_loader.o
+obj-$(CONFIG_QCOM_WCNSS_PIL)		+= qcom_wcnss.o
diff --git a/drivers/remoteproc/qcom_mdt_loader.c b/drivers/remoteproc/qcom_mdt_loader.c
new file mode 100644
index 000000000000..30d67f3e63c1
--- /dev/null
+++ b/drivers/remoteproc/qcom_mdt_loader.c
@@ -0,0 +1,213 @@
+/*
+ * Qualcomm Peripheral Image Loader
+ *
+ * Copyright (C) 2015 Sony Mobile Communications Inc
+ * Copyright (c) 2012-2013, 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 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/remoteproc.h>
+#include <linux/interrupt.h>
+#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/elf.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
+#include <linux/qcom_scm.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
+#include "remoteproc_internal.h"
+
+#define segment_is_hash(flag) (((flag) & (0x7 << 24)) == (0x2 << 24))
+
+static int segment_is_loadable(const struct elf32_phdr *p)
+{
+	return (p->p_type == PT_LOAD) &&
+	       !segment_is_hash(p->p_flags) &&
+	       p->p_memsz;
+}
+
+/**
+ * rproc_mdt_sanity_check() - sanity check mdt firmware header
+ * @rproc: the remote processor handle
+ * @fw: the mdt header firmware image
+ *
+ * Returns 0 for a valid header, -EINVAL otherwise.
+ */
+int qcom_mdt_sanity_check(struct rproc *rproc,
+			  const struct firmware *fw)
+{
+	struct elf32_hdr *ehdr;
+
+	if (!fw) {
+		dev_err(&rproc->dev, "failed to load %s\n", rproc->name);
+		return -EINVAL;
+	}
+
+	if (fw->size < sizeof(struct elf32_hdr)) {
+		dev_err(&rproc->dev, "image is too small\n");
+		return -EINVAL;
+	}
+
+	ehdr = (struct elf32_hdr *)fw->data;
+	if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) {
+		dev_err(&rproc->dev, "image is corrupted (bad magic)\n");
+		return -EINVAL;
+	}
+
+	if (ehdr->e_phnum == 0) {
+		dev_err(&rproc->dev, "no loadable segments\n");
+		return -EINVAL;
+	}
+
+	if (sizeof(struct elf32_phdr) * ehdr->e_phnum +
+	    sizeof(struct elf32_hdr) > fw->size) {
+		dev_err(&rproc->dev, "firmware size is too small\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_sanity_check);
+
+/**
+ * qcom_mdt_find_rsc_table() - provide dummy resource table for remoteproc
+ * @rproc:	remoteproc handle
+ * @fw:		firmware header
+ * @tablesz:	outgoing size of the table
+ *
+ * Returns a dummy table.
+ */
+struct resource_table *qcom_mdt_find_rsc_table(struct rproc *rproc,
+					       const struct firmware *fw,
+					       int *tablesz)
+{
+	static struct resource_table table = { .ver = 1, };
+
+	*tablesz = sizeof(table);
+	return &table;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_find_rsc_table);
+
+static int qproc_load_segment(struct rproc *rproc,
+			      const char *fw_name,
+			      const struct elf32_phdr *phdr)
+{
+	const struct firmware *fw;
+	void *ptr;
+	int ret = 0;
+
+	ptr = ioremap(phdr->p_paddr, phdr->p_memsz);
+	if (!ptr) {
+		dev_err(&rproc->dev,
+			"failed to ioremap segment area (0x%x+0x%x)\n",
+			phdr->p_paddr,
+			phdr->p_memsz);
+		return -EBUSY;
+	}
+
+	if (phdr->p_filesz) {
+		ret = request_firmware(&fw, fw_name, &rproc->dev);
+		if (ret) {
+			dev_err(&rproc->dev, "failed to load %s\n", fw_name);
+			goto out;
+		}
+
+		memcpy(ptr, fw->data, fw->size);
+
+		release_firmware(fw);
+	}
+
+	if (phdr->p_memsz > phdr->p_filesz)
+		memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
+
+out:
+	iounmap(ptr);
+	return ret;
+}
+
+/**
+ * qcom_mdt_load() - load the firmware which header is defined in fw
+ * @rproc:	rproc handle
+ * @pas_id:	PAS identifier to load this firmware into
+ * @fw:		frimware object for the header
+ *
+ * Returns 0 on success, negative errno otherwise.
+ */
+int qcom_mdt_load(struct rproc *rproc,
+		  unsigned pas_id,
+		  const struct firmware *fw)
+{
+	const struct elf32_phdr *phdrs;
+	const struct elf32_hdr *ehdr;
+	phys_addr_t min_addr = (phys_addr_t)ULLONG_MAX;
+	phys_addr_t max_addr = 0;
+	unsigned fw_name_len;
+	char *fw_name;
+	int ret;
+	int i;
+
+	ehdr = (struct elf32_hdr *)fw->data;
+	phdrs = (struct elf_phdr *)(ehdr + 1);
+
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		if (!segment_is_loadable(&phdrs[i]))
+			continue;
+
+		if (phdrs[i].p_paddr < min_addr)
+			min_addr = phdrs[i].p_paddr;
+
+		if (phdrs[i].p_paddr + phdrs[i].p_memsz > max_addr)
+			max_addr = round_up(phdrs[i].p_paddr + phdrs[i].p_memsz, SZ_4K);
+	}
+
+	ret = qcom_scm_pas_init_image(pas_id, fw->data, fw->size);
+	if (ret) {
+		dev_err(&rproc->dev, "Invalid firmware metadata\n");
+		return -EINVAL;
+	}
+
+	ret = qcom_scm_pas_mem_setup(pas_id, min_addr, max_addr - min_addr);
+	if (ret) {
+		dev_err(&rproc->dev, "unable to setup memory for image\n");
+		return -EINVAL;
+	}
+
+	fw_name = kstrdup(rproc->firmware, GFP_KERNEL);
+	if (!fw_name)
+		return -ENOMEM;
+
+	fw_name_len = strlen(fw_name);
+	if (fw_name_len <= 4)
+		return -EINVAL;
+
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		if (!segment_is_loadable(&phdrs[i]))
+			continue;
+
+		sprintf(fw_name + fw_name_len - 3, "b%02d", i);
+		ret = qproc_load_segment(rproc, fw_name, &phdrs[i]);
+		if (ret)
+			break;
+	}
+
+	kfree(fw_name);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_mdt_load);
diff --git a/drivers/remoteproc/qcom_mdt_loader.h b/drivers/remoteproc/qcom_mdt_loader.h
new file mode 100644
index 000000000000..e36f7daf1f71
--- /dev/null
+++ b/drivers/remoteproc/qcom_mdt_loader.h
@@ -0,0 +1,8 @@
+#ifndef __QCOM_MDT_LOADER_H__
+#define __QCOM_MDT_LOADER_H__
+
+int qcom_mdt_sanity_check(struct rproc *rproc, const struct firmware *fw);
+struct resource_table * qcom_mdt_find_rsc_table(struct rproc *rproc, const struct firmware *fw, int *tablesz);
+int qcom_mdt_load(struct rproc *rproc, unsigned pas_id, const struct firmware *fw);
+
+#endif
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
new file mode 100644
index 000000000000..3350782b08d4
--- /dev/null
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -0,0 +1,615 @@
+/*
+ * Qualcomm Peripheral Image Loader
+ *
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, 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 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/firmware.h>
+#include <linux/remoteproc.h>
+#include <linux/interrupt.h>
+#include <linux/of_device.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+#include <linux/qcom_scm.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
+#include "qcom_mdt_loader.h"
+#include "remoteproc_internal.h"
+
+#define WCNSS_PAS_ID			6
+
+#define WCNSS_SPARE_NVBIN_DLND		BIT(25)
+
+#define WCNSS_PMU_IRIS_XO_CFG		BIT(3)
+#define WCNSS_PMU_IRIS_XO_EN		BIT(4)
+#define WCNSS_PMU_GC_BUS_MUX_SEL_TOP	BIT(5)
+#define WCNSS_PMU_IRIS_XO_CFG_STS	BIT(6) /* 1: in progress, 0: done */
+
+#define WCNSS_PMU_IRIS_RESET		BIT(7)
+#define WCNSS_PMU_IRIS_RESET_STS	BIT(8) /* 1: in progress, 0: done */
+#define WCNSS_PMU_IRIS_XO_READ		BIT(9)
+#define WCNSS_PMU_IRIS_XO_READ_STS	BIT(10)
+
+#define WCNSS_PMU_XO_MODE_MASK		GENMASK(2, 1)
+#define WCNSS_PMU_XO_MODE_19p2		0
+#define WCNSS_PMU_XO_MODE_48		3
+
+struct wcnss {
+	struct device *dev;
+	struct rproc *rproc;
+
+	void __iomem *pmu_cfg;
+	void __iomem *spare_out;
+
+	bool use_48mhz_xo;
+
+	int wdog_irq;
+	int fatal_irq;
+	int ready_irq;
+	int handover_irq;
+	int stop_ack_irq;
+
+	struct qcom_smem_state *state;
+	unsigned stop_bit;
+
+	struct clk *xo_clk;
+	struct clk *rf_clk;
+
+	struct regulator_bulk_data *vregs;
+	size_t num_vregs;
+
+	struct completion start_done;
+	struct completion stop_done;
+
+	unsigned crash_reason;
+};
+
+struct wcnss_vreg_info {
+	const char * const name;
+	int min_voltage;
+	int max_voltage;
+
+	int load_uA;
+
+	bool super_turbo;
+};
+
+struct wcnss_data {
+	size_t pmu_offset;
+	size_t spare_offset;
+
+	const struct wcnss_vreg_info *vregs;
+	size_t num_vregs;
+
+	bool use_48mhz_xo;
+};
+
+static const struct wcnss_data riva_data = {
+	.pmu_offset = 0x28,
+	.spare_offset = 0xb4,
+
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "qcom,iris_vddxo",  1800000, 1800000, 10000 },
+		{ "qcom,iris_vddrfa", 1300000, 1300000, 100000 },
+		{ "qcom,iris_vddpa",  2900000, 3000000, 515000 },
+		{ "qcom,iris_vdddig", 1200000, 1225000, 10000 },
+		{ "qcom,riva_vddmx",  1050000, 1150000, 0 },
+		{ "qcom,riva_vddcx",  1050000, 1150000, 0 },
+		{ "qcom,riva_vddpx",  1800000, 1800000, 0 },
+	},
+	.num_vregs = 7,
+
+	.use_48mhz_xo = false,
+};
+
+static const struct wcnss_data pronto_v1_data = {
+	.pmu_offset = 0x1004,
+	.spare_offset = 0x1088,
+
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "qcom,iris-vddxo",  1800000, 1800000, 10000 },
+		{ "qcom,iris-vddrfa", 1300000, 1300000, 100000 },
+		{ "qcom,iris-vddpa",  2900000, 3000000, 515000 },
+		{ "qcom,iris-vdddig", 1225000, 1800000, 10000 },
+		{ "qcom,pronto-vddmx", 950000, 1150000, 0 },
+		{ "qcom,pronto-vddcx", .super_turbo = true},
+		{ "qcom,pronto-vddpx", 1800000, 1800000, 0 },
+	},
+	.num_vregs = 7,
+
+	.use_48mhz_xo = true,
+};
+
+static const struct wcnss_data pronto_v2_data = {
+	.pmu_offset = 0x1004,
+	.spare_offset = 0x1088,
+
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "qcom,iris-vddxo",  1800000, 1800000, 10000 },
+		{ "qcom,iris-vddrfa", 1300000, 1300000, 100000 },
+		{ "qcom,iris-vddpa",  3300000, 3300000, 515000 },
+		{ "qcom,iris-vdddig", 1800000, 1800000, 10000 },
+		{ "qcom,pronto-vddmx", 1287500, 1287500, 0 },
+		{ "qcom,pronto-vddcx", .super_turbo = true },
+		{ "qcom,pronto-vddpx", 1800000, 1800000, 0 },
+	},
+	.num_vregs = 7,
+
+	.use_48mhz_xo = true,
+};
+
+static int wcnss_load(struct rproc *rproc, const struct firmware *fw)
+{
+	return qcom_mdt_load(rproc, WCNSS_PAS_ID, fw);
+}
+
+static const struct rproc_fw_ops wcnss_fw_ops = {
+	.find_rsc_table = qcom_mdt_find_rsc_table,
+	.sanity_check = qcom_mdt_sanity_check,
+	.load = wcnss_load,
+};
+
+static void wcnss_indicate_nv_download(struct wcnss *wcnss)
+{
+	u32 val;
+
+	/* Indicate NV download capability */
+	val = readl(wcnss->spare_out);
+	val |= WCNSS_SPARE_NVBIN_DLND;
+	writel(val, wcnss->spare_out);
+}
+
+static void wcnss_configure_iris(struct wcnss *wcnss)
+{
+	u32 val;
+
+	/* Clear PMU cfg register */
+	writel(0, wcnss->pmu_cfg);
+
+	val = WCNSS_PMU_GC_BUS_MUX_SEL_TOP | WCNSS_PMU_IRIS_XO_EN;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Clear XO_MODE */
+	val &= ~WCNSS_PMU_XO_MODE_MASK;
+	if (wcnss->use_48mhz_xo)
+		val |= WCNSS_PMU_XO_MODE_48 << 1;
+	else
+		val |= WCNSS_PMU_XO_MODE_19p2 << 1;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Reset IRIS */
+	val |= WCNSS_PMU_IRIS_RESET;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Wait for PMU.iris_reg_reset_sts */
+	while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_RESET_STS)
+		cpu_relax();
+
+	/* Clear IRIS reset */
+	val &= ~WCNSS_PMU_IRIS_RESET;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Start IRIS XO configuration */
+	val |= WCNSS_PMU_IRIS_XO_CFG;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Wait for XO configuration to finish */
+	while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_XO_CFG_STS)
+		cpu_relax();
+
+	/* Stop IRIS XO configuration */
+	val &= ~WCNSS_PMU_GC_BUS_MUX_SEL_TOP;
+	val &= ~WCNSS_PMU_IRIS_XO_CFG;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Add some delay for XO to settle */
+	msleep(20);
+}
+
+static int wcnss_start(struct rproc *rproc)
+{
+	struct wcnss *wcnss = (struct wcnss *)rproc->priv;
+	int ret;
+
+	ret = regulator_bulk_enable(wcnss->num_vregs, wcnss->vregs);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(wcnss->xo_clk);
+	if (ret) {
+		dev_err(wcnss->dev, "failed to enable xo clk\n");
+		goto release_regs;
+	}
+
+	ret = clk_prepare_enable(wcnss->rf_clk);
+	if (ret) {
+		dev_err(wcnss->dev, "failed to enable rf clk\n");
+		goto release_regs;
+	}
+
+	wcnss_indicate_nv_download(wcnss);
+	wcnss_configure_iris(wcnss);
+
+	ret = qcom_scm_pas_auth_and_reset(WCNSS_PAS_ID);
+	if (ret) {
+		dev_err(wcnss->dev,
+			"failed to authenticate image and release reset\n");
+		goto release_xo;
+	}
+
+	ret = wait_for_completion_timeout(&wcnss->start_done, msecs_to_jiffies(10000));
+	if (ret == 0) {
+		dev_err(wcnss->dev, "start timed out\n");
+
+		qcom_scm_pas_shutdown(WCNSS_PAS_ID);
+		ret = -ETIMEDOUT;
+		goto release_xo;
+	}
+
+	ret = 0;
+
+release_xo:
+	clk_disable_unprepare(wcnss->rf_clk);
+	clk_disable_unprepare(wcnss->xo_clk);
+release_regs:
+	regulator_bulk_disable(wcnss->num_vregs, wcnss->vregs);
+
+	return ret;
+}
+
+static int wcnss_stop(struct rproc *rproc)
+{
+	struct wcnss *wcnss = (struct wcnss *)rproc->priv;
+	int ret;
+
+	qcom_smem_state_update_bits(wcnss->state, BIT(wcnss->stop_bit), BIT(wcnss->stop_bit));
+
+	ret = wait_for_completion_timeout(&wcnss->stop_done, msecs_to_jiffies(1000));
+	if (ret == 0)
+		dev_err(wcnss->dev, "timed out on wait\n");
+
+	qcom_smem_state_update_bits(wcnss->state, BIT(wcnss->stop_bit), 0);
+
+	ret = qcom_scm_pas_shutdown(WCNSS_PAS_ID);
+	if (ret)
+		dev_err(wcnss->dev, "failed to shutdown: %d\n", ret);
+
+	return ret;
+}
+
+static const struct rproc_ops wcnss_ops = {
+	.start = wcnss_start,
+	.stop = wcnss_stop,
+};
+
+static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
+{
+	struct wcnss *wcnss = dev;
+
+	rproc_report_crash(wcnss->rproc, RPROC_WATCHDOG);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
+{
+	struct wcnss *wcnss = dev;
+	size_t len;
+	char *msg;
+
+	msg = qcom_smem_get(-1, wcnss->crash_reason, &len);
+	if (!IS_ERR(msg) && len > 0 && msg[0])
+		dev_err(wcnss->dev, "fatal error received: %s\n", msg);
+
+	rproc_report_crash(wcnss->rproc, RPROC_FATAL_ERROR);
+
+	if (!IS_ERR(msg))
+		msg[0] = '\0';
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_ready_interrupt(int irq, void *dev)
+{
+	struct wcnss *wcnss = dev;
+
+	complete(&wcnss->start_done);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_handover_interrupt(int irq, void *dev)
+{
+	/*
+	 * XXX: At this point we're supposed to release the resources that we
+	 * have been holding on behalf of the WCNSS. Unfortunately this
+	 * interrupt comes way before the other side seems to be done.
+	 *
+	 * So we're currently relying on the ready interrupt firing later then
+	 * this and we just disable the resources at the end of wcnss_start().
+	 */
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_stop_ack_interrupt(int irq, void *dev)
+{
+	struct wcnss *wcnss = dev;
+
+	complete(&wcnss->stop_done);
+	return IRQ_HANDLED;
+}
+
+static ssize_t wcnss_boot_store(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t size)
+{
+	struct wcnss *wcnss = dev_get_drvdata(dev);
+	int ret;
+
+	ret = rproc_boot(wcnss->rproc);
+	return ret ? : size;
+}
+
+static ssize_t wcnss_shutdown_store(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t size)
+{
+	struct wcnss *wcnss = dev_get_drvdata(dev);
+
+	rproc_shutdown(wcnss->rproc);
+	return size;
+}
+
+static const struct device_attribute wcnss_attrs[] = {
+	__ATTR(boot, S_IWUSR, NULL, wcnss_boot_store),
+	__ATTR(shutdown, S_IWUSR, NULL, wcnss_shutdown_store),
+};
+
+static int wcnss_init_regulators(struct wcnss *wcnss,
+				 const struct wcnss_vreg_info *info,
+				 int num_vregs)
+{
+	struct regulator_bulk_data *bulk;
+	int ret;
+	int i;
+
+	bulk = devm_kcalloc(wcnss->dev,
+			    num_vregs, sizeof(struct regulator_bulk_data),
+			    GFP_KERNEL);
+	if (!bulk)
+		return -ENOMEM;
+
+	for (i = 0; i < num_vregs; i++)
+		bulk[i].supply = info[i].name;
+
+	ret = devm_regulator_bulk_get(wcnss->dev, num_vregs, bulk);
+	if (ret) {
+		dev_err(wcnss->dev, "failed to get regulators\n");
+		return ret;
+	}
+
+	for (i = 0; i < num_vregs; i++) {
+		if (info[i].max_voltage)
+			regulator_set_voltage(bulk[i].consumer,
+					      info[i].min_voltage,
+					      info[i].max_voltage);
+
+		if (info[i].load_uA)
+			regulator_set_load(bulk[i].consumer, info[i].load_uA);
+	}
+
+	wcnss->vregs = bulk;
+	wcnss->num_vregs = num_vregs;
+
+	return 0;
+}
+
+static int wcnss_request_irq(struct wcnss *wcnss,
+			     struct platform_device *pdev,
+			     const char *name,
+			     irq_handler_t thread_fn)
+{
+	int ret;
+
+	ret = platform_get_irq_byname(pdev, name);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "no %s IRQ defined\n", name);
+		return ret;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, ret,
+					NULL, thread_fn,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"wcnss", wcnss);
+	if (ret)
+		dev_err(&pdev->dev, "request %s IRQ failed\n", name);
+	return ret;
+}
+
+static int wcnss_probe(struct platform_device *pdev)
+{
+	const struct wcnss_data *data;
+	struct resource *res;
+	struct wcnss *wcnss;
+	struct rproc *rproc;
+	void __iomem *mmio;
+	char *fw_name;
+	const char *name;
+	const char *key;
+	int ret;
+	int i;
+
+	data = of_device_get_match_data(&pdev->dev);
+
+	if (!qcom_scm_pas_supported(WCNSS_PAS_ID)) {
+		dev_err(&pdev->dev, "PAS is not available for WCNSS\n");
+		return -ENXIO;
+	}
+
+	key = "qcom,firmware-name";
+	ret = of_property_read_string(pdev->dev.of_node, key, &name);
+	if (ret) {
+		dev_err(&pdev->dev, "missing or incorrect %s\n", key);
+		return -EINVAL;
+	}
+
+	fw_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s.mdt", name);
+	if (!fw_name)
+		return -ENOMEM;
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
+			    fw_name, sizeof(*wcnss));
+	if (!rproc) {
+		dev_err(&pdev->dev, "unable to allocate remoteproc\n");
+		return -ENOMEM;
+	}
+
+	rproc->fw_ops = &wcnss_fw_ops;
+
+	wcnss = (struct wcnss *)rproc->priv;
+	wcnss->dev = &pdev->dev;
+	wcnss->rproc = rproc;
+	platform_set_drvdata(pdev, wcnss);
+
+	init_completion(&wcnss->start_done);
+	init_completion(&wcnss->stop_done);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mmio = devm_ioremap_resource(&pdev->dev, res);
+	if (!mmio) {
+		ret = -ENOMEM;
+		goto free_rproc;
+	};
+
+	wcnss->pmu_cfg = mmio + data->pmu_offset;
+	wcnss->spare_out = mmio + data->spare_offset;
+
+	wcnss->use_48mhz_xo = of_property_read_bool(pdev->dev.of_node,
+						    "qcom,has-48mhz-xo");
+	if (!wcnss->use_48mhz_xo)
+		wcnss->use_48mhz_xo = data->use_48mhz_xo;
+
+	wcnss->xo_clk = devm_clk_get(&pdev->dev, "xo");
+	if (IS_ERR(wcnss->xo_clk)) {
+		if (PTR_ERR(wcnss->xo_clk) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "failed to acquire xo clk\n");
+		ret = PTR_ERR(wcnss->xo_clk);
+		goto free_rproc;
+	}
+
+	wcnss->rf_clk = devm_clk_get(&pdev->dev, "rf_clk");
+	if (IS_ERR(wcnss->rf_clk))
+		wcnss->rf_clk = NULL;
+
+	ret = of_property_read_u32(pdev->dev.of_node, "qcom,crash-reason",
+				   &wcnss->crash_reason);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to read crash reason id\n");
+		goto free_rproc;
+	}
+
+	ret = wcnss_init_regulators(wcnss, data->vregs, data->num_vregs);
+	if (ret)
+		goto free_rproc;
+
+	ret = wcnss_request_irq(wcnss, pdev, "wdog", wcnss_wdog_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->wdog_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "fatal", wcnss_fatal_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->fatal_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "ready", wcnss_ready_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->ready_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "handover", wcnss_handover_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->handover_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "stop-ack", wcnss_stop_ack_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->stop_ack_irq = ret;
+
+	wcnss->state = qcom_smem_state_get(&pdev->dev, "stop", &wcnss->stop_bit);
+	if (IS_ERR(wcnss->state))
+		goto free_rproc;
+
+	for (i = 0; i < ARRAY_SIZE(wcnss_attrs); i++) {
+		ret = device_create_file(&pdev->dev, &wcnss_attrs[i]);
+		if (ret) {
+			dev_err(&pdev->dev, "unable to create sysfs file\n");
+			goto remove_device_files;
+		}
+	}
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto remove_device_files;
+
+	return 0;
+
+remove_device_files:
+	for (i--; i >= 0; i--)
+		device_remove_file(&pdev->dev, &wcnss_attrs[i]);
+
+free_rproc:
+	rproc_put(rproc);
+
+	return ret;
+}
+
+static int wcnss_remove(struct platform_device *pdev)
+{
+	struct wcnss *wcnss = platform_get_drvdata(pdev);
+	int i;
+
+	qcom_smem_state_put(wcnss->state);
+
+	for (i = 0; i < ARRAY_SIZE(wcnss_attrs); i++)
+		device_remove_file(&pdev->dev, &wcnss_attrs[i]);
+
+	rproc_put(wcnss->rproc);
+
+	return 0;
+}
+
+static const struct of_device_id wcnss_of_match[] = {
+	{ .compatible = "qcom,riva-pil", &riva_data },
+	{ .compatible = "qcom,pronto-v1-pil", &pronto_v1_data },
+	{ .compatible = "qcom,pronto-v2-pil", &pronto_v2_data },
+	{ },
+};
+
+static struct platform_driver wcnss_driver = {
+	.probe = wcnss_probe,
+	.remove = wcnss_remove,
+	.driver = {
+		.name = "qcom-wcnss-pil",
+		.of_match_table = wcnss_of_match,
+	},
+};
+
+module_platform_driver(wcnss_driver);
-- 
1.8.2.2

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