[linux-2.6-block.git] / drivers / remoteproc / qcom_wcnss.c

/*
 * Qualcomm Wireless Connectivity Subsystem Peripheral Image Loader
 *
 * Copyright (C) 2016 Linaro Ltd
 * 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/clk.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/qcom_scm.h>
#include <linux/regulator/consumer.h>
#include <linux/remoteproc.h>
#include <linux/soc/qcom/mdt_loader.h>
#include <linux/soc/qcom/smem.h>
#include <linux/soc/qcom/smem_state.h>
#include <linux/rpmsg/qcom_smd.h>

#include "qcom_common.h"
#include "remoteproc_internal.h"
#include "qcom_wcnss.h"

#define WCNSS_CRASH_REASON_SMEM		422
#define WCNSS_FIRMWARE_NAME		"wcnss.mdt"
#define WCNSS_PAS_ID			6
#define WCNSS_SSCTL_ID			0x13

#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_data {
	size_t pmu_offset;
	size_t spare_offset;

	const struct wcnss_vreg_info *vregs;
	size_t num_vregs;
};

struct qcom_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 mutex iris_lock;
	struct qcom_iris *iris;

	struct regulator_bulk_data *vregs;
	size_t num_vregs;

	struct completion start_done;
	struct completion stop_done;

	phys_addr_t mem_phys;
	phys_addr_t mem_reloc;
	void *mem_region;
	size_t mem_size;

	struct qcom_rproc_subdev smd_subdev;
	struct qcom_sysmon *sysmon;
};

static const struct wcnss_data riva_data = {
	.pmu_offset = 0x28,
	.spare_offset = 0xb4,

	.vregs = (struct wcnss_vreg_info[]) {
		{ "vddmx",  1050000, 1150000, 0 },
		{ "vddcx",  1050000, 1150000, 0 },
		{ "vddpx",  1800000, 1800000, 0 },
	},
	.num_vregs = 3,
};

static const struct wcnss_data pronto_v1_data = {
	.pmu_offset = 0x1004,
	.spare_offset = 0x1088,

	.vregs = (struct wcnss_vreg_info[]) {
		{ "vddmx", 950000, 1150000, 0 },
		{ "vddcx", .super_turbo = true},
		{ "vddpx", 1800000, 1800000, 0 },
	},
	.num_vregs = 3,
};

static const struct wcnss_data pronto_v2_data = {
	.pmu_offset = 0x1004,
	.spare_offset = 0x1088,

	.vregs = (struct wcnss_vreg_info[]) {
		{ "vddmx", 1287500, 1287500, 0 },
		{ "vddcx", .super_turbo = true },
		{ "vddpx", 1800000, 1800000, 0 },
	},
	.num_vregs = 3,
};

void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss,
			    struct qcom_iris *iris,
			    bool use_48mhz_xo)
{
	mutex_lock(&wcnss->iris_lock);

	wcnss->iris = iris;
	wcnss->use_48mhz_xo = use_48mhz_xo;

	mutex_unlock(&wcnss->iris_lock);
}

static int wcnss_load(struct rproc *rproc, const struct firmware *fw)
{
	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;

	return qcom_mdt_load(wcnss->dev, fw, rproc->firmware, WCNSS_PAS_ID,
			     wcnss->mem_region, wcnss->mem_phys,
			     wcnss->mem_size, &wcnss->mem_reloc);
}

static void wcnss_indicate_nv_download(struct qcom_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 qcom_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 qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
	int ret;

	mutex_lock(&wcnss->iris_lock);
	if (!wcnss->iris) {
		dev_err(wcnss->dev, "no iris registered\n");
		ret = -EINVAL;
		goto release_iris_lock;
	}

	ret = regulator_bulk_enable(wcnss->num_vregs, wcnss->vregs);
	if (ret)
		goto release_iris_lock;

	ret = qcom_iris_enable(wcnss->iris);
	if (ret)
		goto disable_regulators;

	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 disable_iris;
	}

	ret = wait_for_completion_timeout(&wcnss->start_done,
					  msecs_to_jiffies(5000));
	if (wcnss->ready_irq > 0 && ret == 0) {
		/* We have a ready_irq, but it didn't fire in time. */
		dev_err(wcnss->dev, "start timed out\n");
		qcom_scm_pas_shutdown(WCNSS_PAS_ID);
		ret = -ETIMEDOUT;
		goto disable_iris;
	}

	ret = 0;

disable_iris:
	qcom_iris_disable(wcnss->iris);
disable_regulators:
	regulator_bulk_disable(wcnss->num_vregs, wcnss->vregs);
release_iris_lock:
	mutex_unlock(&wcnss->iris_lock);

	return ret;
}

static int wcnss_stop(struct rproc *rproc)
{
	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
	int ret;

	if (wcnss->state) {
		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(5000));
		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 void *wcnss_da_to_va(struct rproc *rproc, u64 da, int len)
{
	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
	int offset;

	offset = da - wcnss->mem_reloc;
	if (offset < 0 || offset + len > wcnss->mem_size)
		return NULL;

	return wcnss->mem_region + offset;
}

static const struct rproc_ops wcnss_ops = {
	.start = wcnss_start,
	.stop = wcnss_stop,
	.da_to_va = wcnss_da_to_va,
	.parse_fw = qcom_register_dump_segments,
	.load = wcnss_load,
};

static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
{
	struct qcom_wcnss *wcnss = dev;

	rproc_report_crash(wcnss->rproc, RPROC_WATCHDOG);

	return IRQ_HANDLED;
}

static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
{
	struct qcom_wcnss *wcnss = dev;
	size_t len;
	char *msg;

	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, WCNSS_CRASH_REASON_SMEM, &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);

	return IRQ_HANDLED;
}

static irqreturn_t wcnss_ready_interrupt(int irq, void *dev)
{
	struct qcom_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 qcom_wcnss *wcnss = dev;

	complete(&wcnss->stop_done);

	return IRQ_HANDLED;
}

static int wcnss_init_regulators(struct qcom_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)
		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 qcom_wcnss *wcnss,
			     struct platform_device *pdev,
			     const char *name,
			     bool optional,
			     irq_handler_t thread_fn)
{
	int ret;

	ret = platform_get_irq_byname(pdev, name);
	if (ret < 0 && optional) {
		dev_dbg(&pdev->dev, "no %s IRQ defined, ignoring\n", name);
		return 0;
	} else 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_alloc_memory_region(struct qcom_wcnss *wcnss)
{
	struct device_node *node;
	struct resource r;
	int ret;

	node = of_parse_phandle(wcnss->dev->of_node, "memory-region", 0);
	if (!node) {
		dev_err(wcnss->dev, "no memory-region specified\n");
		return -EINVAL;
	}

	ret = of_address_to_resource(node, 0, &r);
	if (ret)
		return ret;

	wcnss->mem_phys = wcnss->mem_reloc = r.start;
	wcnss->mem_size = resource_size(&r);
	wcnss->mem_region = devm_ioremap_wc(wcnss->dev, wcnss->mem_phys, wcnss->mem_size);
	if (!wcnss->mem_region) {
		dev_err(wcnss->dev, "unable to map memory region: %pa+%zx\n",
			&r.start, wcnss->mem_size);
		return -EBUSY;
	}

	return 0;
}

static int wcnss_probe(struct platform_device *pdev)
{
	const struct wcnss_data *data;
	struct qcom_wcnss *wcnss;
	struct resource *res;
	struct rproc *rproc;
	void __iomem *mmio;
	int ret;

	data = of_device_get_match_data(&pdev->dev);

	if (!qcom_scm_is_available())
		return -EPROBE_DEFER;

	if (!qcom_scm_pas_supported(WCNSS_PAS_ID)) {
		dev_err(&pdev->dev, "PAS is not available for WCNSS\n");
		return -ENXIO;
	}

	rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
			    WCNSS_FIRMWARE_NAME, sizeof(*wcnss));
	if (!rproc) {
		dev_err(&pdev->dev, "unable to allocate remoteproc\n");
		return -ENOMEM;
	}

	wcnss = (struct qcom_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);

	mutex_init(&wcnss->iris_lock);

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmu");
	mmio = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(mmio)) {
		ret = PTR_ERR(mmio);
		goto free_rproc;
	};

	ret = wcnss_alloc_memory_region(wcnss);
	if (ret)
		goto free_rproc;

	wcnss->pmu_cfg = mmio + data->pmu_offset;
	wcnss->spare_out = mmio + data->spare_offset;

	ret = wcnss_init_regulators(wcnss, data->vregs, data->num_vregs);
	if (ret)
		goto free_rproc;

	ret = wcnss_request_irq(wcnss, pdev, "wdog", false, wcnss_wdog_interrupt);
	if (ret < 0)
		goto free_rproc;
	wcnss->wdog_irq = ret;

	ret = wcnss_request_irq(wcnss, pdev, "fatal", false, wcnss_fatal_interrupt);
	if (ret < 0)
		goto free_rproc;
	wcnss->fatal_irq = ret;

	ret = wcnss_request_irq(wcnss, pdev, "ready", true, wcnss_ready_interrupt);
	if (ret < 0)
		goto free_rproc;
	wcnss->ready_irq = ret;

	ret = wcnss_request_irq(wcnss, pdev, "handover", true, wcnss_handover_interrupt);
	if (ret < 0)
		goto free_rproc;
	wcnss->handover_irq = ret;

	ret = wcnss_request_irq(wcnss, pdev, "stop-ack", true, wcnss_stop_ack_interrupt);
	if (ret < 0)
		goto free_rproc;
	wcnss->stop_ack_irq = ret;

	if (wcnss->stop_ack_irq) {
		wcnss->state = qcom_smem_state_get(&pdev->dev, "stop",
						   &wcnss->stop_bit);
		if (IS_ERR(wcnss->state)) {
			ret = PTR_ERR(wcnss->state);
			goto free_rproc;
		}
	}

	qcom_add_smd_subdev(rproc, &wcnss->smd_subdev);
	wcnss->sysmon = qcom_add_sysmon_subdev(rproc, "wcnss", WCNSS_SSCTL_ID);
	if (IS_ERR(wcnss->sysmon)) {
		ret = PTR_ERR(wcnss->sysmon);
		goto free_rproc;
	}

	ret = rproc_add(rproc);
	if (ret)
		goto free_rproc;

	return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);

free_rproc:
	rproc_free(rproc);

	return ret;
}

static int wcnss_remove(struct platform_device *pdev)
{
	struct qcom_wcnss *wcnss = platform_get_drvdata(pdev);

	of_platform_depopulate(&pdev->dev);

	qcom_smem_state_put(wcnss->state);
	rproc_del(wcnss->rproc);

	qcom_remove_sysmon_subdev(wcnss->sysmon);
	qcom_remove_smd_subdev(wcnss->rproc, &wcnss->smd_subdev);
	rproc_free(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 },
	{ },
};
MODULE_DEVICE_TABLE(of, wcnss_of_match);

static struct platform_driver wcnss_driver = {
	.probe = wcnss_probe,
	.remove = wcnss_remove,
	.driver = {
		.name = "qcom-wcnss-pil",
		.of_match_table = wcnss_of_match,
	},
};

static int __init wcnss_init(void)
{
	int ret;

	ret = platform_driver_register(&wcnss_driver);
	if (ret)
		return ret;

	ret = platform_driver_register(&qcom_iris_driver);
	if (ret)
		platform_driver_unregister(&wcnss_driver);

	return ret;
}
module_init(wcnss_init);

static void __exit wcnss_exit(void)
{
	platform_driver_unregister(&qcom_iris_driver);
	platform_driver_unregister(&wcnss_driver);
}
module_exit(wcnss_exit);

MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Wireless Subsystem");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
aed361ad BA	1	/*
	2	* Qualcomm Wireless Connectivity Subsystem Peripheral Image Loader
	3	*
	4	* Copyright (C) 2016 Linaro Ltd
	5	* Copyright (C) 2014 Sony Mobile Communications AB
	6	* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/clk.h>
	19	#include <linux/delay.h>
	20	#include <linux/firmware.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/kernel.h>
	23	#include <linux/module.h>
	24	#include <linux/io.h>
	25	#include <linux/of_address.h>
	26	#include <linux/of_device.h>
	27	#include <linux/platform_device.h>
	28	#include <linux/qcom_scm.h>
	29	#include <linux/regulator/consumer.h>
	30	#include <linux/remoteproc.h>
2aad40d9	31	#include <linux/soc/qcom/mdt_loader.h>
aed361ad BA	32	#include <linux/soc/qcom/smem.h>
aed361ad BA	33	#include <linux/soc/qcom/smem_state.h>
5a856bc6	34	#include <linux/rpmsg/qcom_smd.h>
aed361ad	35
bde440ee	36	#include "qcom_common.h"
aed361ad BA	37	#include "remoteproc_internal.h"
	38	#include "qcom_wcnss.h"
	39
	40	#define WCNSS_CRASH_REASON_SMEM 422
	41	#define WCNSS_FIRMWARE_NAME "wcnss.mdt"
	42	#define WCNSS_PAS_ID 6
1fb82ee8	43	#define WCNSS_SSCTL_ID 0x13
aed361ad BA	44
	45	#define WCNSS_SPARE_NVBIN_DLND BIT(25)
	46
	47	#define WCNSS_PMU_IRIS_XO_CFG BIT(3)
	48	#define WCNSS_PMU_IRIS_XO_EN BIT(4)
	49	#define WCNSS_PMU_GC_BUS_MUX_SEL_TOP BIT(5)
	50	#define WCNSS_PMU_IRIS_XO_CFG_STS BIT(6) /* 1: in progress, 0: done */
	51
	52	#define WCNSS_PMU_IRIS_RESET BIT(7)
	53	#define WCNSS_PMU_IRIS_RESET_STS BIT(8) /* 1: in progress, 0: done */
	54	#define WCNSS_PMU_IRIS_XO_READ BIT(9)
	55	#define WCNSS_PMU_IRIS_XO_READ_STS BIT(10)
	56
	57	#define WCNSS_PMU_XO_MODE_MASK GENMASK(2, 1)
	58	#define WCNSS_PMU_XO_MODE_19p2 0
	59	#define WCNSS_PMU_XO_MODE_48 3
	60
	61	struct wcnss_data {
	62	size_t pmu_offset;
	63	size_t spare_offset;
	64
	65	const struct wcnss_vreg_info *vregs;
	66	size_t num_vregs;
	67	};
	68
	69	struct qcom_wcnss {
	70	struct device *dev;
	71	struct rproc *rproc;
	72
	73	void __iomem *pmu_cfg;
	74	void __iomem *spare_out;
	75
	76	bool use_48mhz_xo;
	77
	78	int wdog_irq;
	79	int fatal_irq;
	80	int ready_irq;
	81	int handover_irq;
	82	int stop_ack_irq;
	83
	84	struct qcom_smem_state *state;
	85	unsigned stop_bit;
	86
	87	struct mutex iris_lock;
	88	struct qcom_iris *iris;
	89
	90	struct regulator_bulk_data *vregs;
	91	size_t num_vregs;
	92
	93	struct completion start_done;
	94	struct completion stop_done;
	95
	96	phys_addr_t mem_phys;
	97	phys_addr_t mem_reloc;
	98	void *mem_region;
	99	size_t mem_size;
5a856bc6	100
b90fcfcb	101	struct qcom_rproc_subdev smd_subdev;
1fb82ee8	102	struct qcom_sysmon *sysmon;
aed361ad BA	103	};
	104
	105	static const struct wcnss_data riva_data = {
	106	.pmu_offset = 0x28,
	107	.spare_offset = 0xb4,
	108
	109	.vregs = (struct wcnss_vreg_info[]) {
	110	{ "vddmx", 1050000, 1150000, 0 },
	111	{ "vddcx", 1050000, 1150000, 0 },
	112	{ "vddpx", 1800000, 1800000, 0 },
	113	},
	114	.num_vregs = 3,
	115	};
	116
	117	static const struct wcnss_data pronto_v1_data = {
	118	.pmu_offset = 0x1004,
	119	.spare_offset = 0x1088,
	120
	121	.vregs = (struct wcnss_vreg_info[]) {
	122	{ "vddmx", 950000, 1150000, 0 },
	123	{ "vddcx", .super_turbo = true},
	124	{ "vddpx", 1800000, 1800000, 0 },
	125	},
	126	.num_vregs = 3,
	127	};
	128
	129	static const struct wcnss_data pronto_v2_data = {
	130	.pmu_offset = 0x1004,
	131	.spare_offset = 0x1088,
	132
	133	.vregs = (struct wcnss_vreg_info[]) {
	134	{ "vddmx", 1287500, 1287500, 0 },
	135	{ "vddcx", .super_turbo = true },
	136	{ "vddpx", 1800000, 1800000, 0 },
	137	},
	138	.num_vregs = 3,
	139	};
	140
	141	void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss,
	142	struct qcom_iris *iris,
	143	bool use_48mhz_xo)
	144	{
	145	mutex_lock(&wcnss->iris_lock);
	146
	147	wcnss->iris = iris;
	148	wcnss->use_48mhz_xo = use_48mhz_xo;
	149
	150	mutex_unlock(&wcnss->iris_lock);
	151	}
aed361ad BA	152
	153	static int wcnss_load(struct rproc rproc, const struct firmware fw)
	154	{
	155	struct qcom_wcnss wcnss = (struct qcom_wcnss )rproc->priv;
7f0dd07a BA	156
7f0dd07a BA	157	return qcom_mdt_load(wcnss->dev, fw, rproc->firmware, WCNSS_PAS_ID,
4dd27f54 BA	158	wcnss->mem_region, wcnss->mem_phys,
4dd27f54 BA	159	wcnss->mem_size, &wcnss->mem_reloc);
aed361ad BA	160	}
aed361ad BA	161
aed361ad BA	162	static void wcnss_indicate_nv_download(struct qcom_wcnss *wcnss)
	163	{
	164	u32 val;
	165
	166	/* Indicate NV download capability */
	167	val = readl(wcnss->spare_out);
	168	val \|= WCNSS_SPARE_NVBIN_DLND;
	169	writel(val, wcnss->spare_out);
	170	}
	171
	172	static void wcnss_configure_iris(struct qcom_wcnss *wcnss)
	173	{
	174	u32 val;
	175
	176	/* Clear PMU cfg register */
	177	writel(0, wcnss->pmu_cfg);
	178
	179	val = WCNSS_PMU_GC_BUS_MUX_SEL_TOP \| WCNSS_PMU_IRIS_XO_EN;
	180	writel(val, wcnss->pmu_cfg);
	181
	182	/* Clear XO_MODE */
	183	val &= ~WCNSS_PMU_XO_MODE_MASK;
	184	if (wcnss->use_48mhz_xo)
	185	val \|= WCNSS_PMU_XO_MODE_48 << 1;
	186	else
	187	val \|= WCNSS_PMU_XO_MODE_19p2 << 1;
	188	writel(val, wcnss->pmu_cfg);
	189
	190	/* Reset IRIS */
	191	val \|= WCNSS_PMU_IRIS_RESET;
	192	writel(val, wcnss->pmu_cfg);
	193
	194	/* Wait for PMU.iris_reg_reset_sts */
	195	while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_RESET_STS)
	196	cpu_relax();
	197
	198	/* Clear IRIS reset */
	199	val &= ~WCNSS_PMU_IRIS_RESET;
	200	writel(val, wcnss->pmu_cfg);
	201
	202	/* Start IRIS XO configuration */
	203	val \|= WCNSS_PMU_IRIS_XO_CFG;
	204	writel(val, wcnss->pmu_cfg);
	205
	206	/* Wait for XO configuration to finish */
	207	while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_XO_CFG_STS)
	208	cpu_relax();
	209
	210	/* Stop IRIS XO configuration */
	211	val &= ~WCNSS_PMU_GC_BUS_MUX_SEL_TOP;
	212	val &= ~WCNSS_PMU_IRIS_XO_CFG;
	213	writel(val, wcnss->pmu_cfg);
	214
	215	/* Add some delay for XO to settle */
	216	msleep(20);
	217	}
	218
	219	static int wcnss_start(struct rproc *rproc)
	220	{
	221	struct qcom_wcnss wcnss = (struct qcom_wcnss )rproc->priv;
	222	int ret;
	223
	224	mutex_lock(&wcnss->iris_lock);
	225	if (!wcnss->iris) {
226	dev_err(wcnss->dev, "no iris registered\n");
227	ret = -EINVAL;
228	goto release_iris_lock;
229	}
230
231	ret = regulator_bulk_enable(wcnss->num_vregs, wcnss->vregs);
232	if (ret)
233	goto release_iris_lock;
234
235	ret = qcom_iris_enable(wcnss->iris);
236	if (ret)
237	goto disable_regulators;
238
239	wcnss_indicate_nv_download(wcnss);
240	wcnss_configure_iris(wcnss);
241
242	ret = qcom_scm_pas_auth_and_reset(WCNSS_PAS_ID);
243	if (ret) {
244	dev_err(wcnss->dev,
245	"failed to authenticate image and release reset\n");
246	goto disable_iris;
247	}
248
249	ret = wait_for_completion_timeout(&wcnss->start_done,
250	msecs_to_jiffies(5000));
251	if (wcnss->ready_irq > 0 && ret == 0) {
252	/* We have a ready_irq, but it didn't fire in time. */
253	dev_err(wcnss->dev, "start timed out\n");
254	qcom_scm_pas_shutdown(WCNSS_PAS_ID);
255	ret = -ETIMEDOUT;
256	goto disable_iris;
257	}
258
259	ret = 0;
260
261	disable_iris:
262	qcom_iris_disable(wcnss->iris);
263	disable_regulators:
264	regulator_bulk_disable(wcnss->num_vregs, wcnss->vregs);
265	release_iris_lock:
266	mutex_unlock(&wcnss->iris_lock);
267
268	return ret;
269	}
270
271	static int wcnss_stop(struct rproc *rproc)
272	{
273	struct qcom_wcnss wcnss = (struct qcom_wcnss )rproc->priv;
274	int ret;
275
276	if (wcnss->state) {
277	qcom_smem_state_update_bits(wcnss->state,
278	BIT(wcnss->stop_bit),
279	BIT(wcnss->stop_bit));
280
281	ret = wait_for_completion_timeout(&wcnss->stop_done,
282	msecs_to_jiffies(5000));
283	if (ret == 0)
284	dev_err(wcnss->dev, "timed out on wait\n");
285
286	qcom_smem_state_update_bits(wcnss->state,
287	BIT(wcnss->stop_bit),
288	0);
289	}
290
291	ret = qcom_scm_pas_shutdown(WCNSS_PAS_ID);
292	if (ret)
293	dev_err(wcnss->dev, "failed to shutdown: %d\n", ret);
294
295	return ret;
296	}
297
298	static void wcnss_da_to_va(struct rproc rproc, u64 da, int len)
299	{
300	struct qcom_wcnss wcnss = (struct qcom_wcnss )rproc->priv;
301	int offset;
302
303	offset = da - wcnss->mem_reloc;
304	if (offset < 0 \|\| offset + len > wcnss->mem_size)
305	return NULL;
306
307	return wcnss->mem_region + offset;
308	}
309
310	static const struct rproc_ops wcnss_ops = {
311	.start = wcnss_start,
312	.stop = wcnss_stop,
313	.da_to_va = wcnss_da_to_va,
dcb57ed4	314	.parse_fw = qcom_register_dump_segments,
0f21f9cc	315	.load = wcnss_load,
aed361ad BA	316	};
	317
	318	static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
	319	{
	320	struct qcom_wcnss *wcnss = dev;
	321
	322	rproc_report_crash(wcnss->rproc, RPROC_WATCHDOG);
	323
	324	return IRQ_HANDLED;
	325	}
	326
	327	static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
	328	{
	329	struct qcom_wcnss *wcnss = dev;
	330	size_t len;
	331	char *msg;
	332
	333	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, WCNSS_CRASH_REASON_SMEM, &len);
	334	if (!IS_ERR(msg) && len > 0 && msg[0])
	335	dev_err(wcnss->dev, "fatal error received: %s\n", msg);
	336
	337	rproc_report_crash(wcnss->rproc, RPROC_FATAL_ERROR);
	338
aed361ad BA	339	return IRQ_HANDLED;
	340	}
	341
	342	static irqreturn_t wcnss_ready_interrupt(int irq, void *dev)
	343	{
	344	struct qcom_wcnss *wcnss = dev;
	345
	346	complete(&wcnss->start_done);
	347
	348	return IRQ_HANDLED;
	349	}
	350
	351	static irqreturn_t wcnss_handover_interrupt(int irq, void *dev)
	352	{
	353	/*
	354	* XXX: At this point we're supposed to release the resources that we
	355	* have been holding on behalf of the WCNSS. Unfortunately this
	356	* interrupt comes way before the other side seems to be done.
	357	*
	358	* So we're currently relying on the ready interrupt firing later then
	359	* this and we just disable the resources at the end of wcnss_start().
	360	*/
	361
	362	return IRQ_HANDLED;
	363	}
	364
	365	static irqreturn_t wcnss_stop_ack_interrupt(int irq, void *dev)
	366	{
	367	struct qcom_wcnss *wcnss = dev;
	368
	369	complete(&wcnss->stop_done);
	370
	371	return IRQ_HANDLED;
	372	}
	373
	374	static int wcnss_init_regulators(struct qcom_wcnss *wcnss,
	375	const struct wcnss_vreg_info *info,
	376	int num_vregs)
	377	{
	378	struct regulator_bulk_data *bulk;
	379	int ret;
	380	int i;
	381
	382	bulk = devm_kcalloc(wcnss->dev,
	383	num_vregs, sizeof(struct regulator_bulk_data),
	384	GFP_KERNEL);
	385	if (!bulk)
	386	return -ENOMEM;
	387
	388	for (i = 0; i < num_vregs; i++)
	389	bulk[i].supply = info[i].name;
	390
	391	ret = devm_regulator_bulk_get(wcnss->dev, num_vregs, bulk);
	392	if (ret)
	393	return ret;
	394
	395	for (i = 0; i < num_vregs; i++) {
	396	if (info[i].max_voltage)
	397	regulator_set_voltage(bulk[i].consumer,
	398	info[i].min_voltage,
	399	info[i].max_voltage);
	400
	401	if (info[i].load_uA)
	402	regulator_set_load(bulk[i].consumer, info[i].load_uA);
403	}
404
405	wcnss->vregs = bulk;
406	wcnss->num_vregs = num_vregs;
407
408	return 0;
409	}
410
411	static int wcnss_request_irq(struct qcom_wcnss *wcnss,
412	struct platform_device *pdev,
413	const char *name,
414	bool optional,
415	irq_handler_t thread_fn)
416	{
417	int ret;
418
419	ret = platform_get_irq_byname(pdev, name);
420	if (ret < 0 && optional) {
421	dev_dbg(&pdev->dev, "no %s IRQ defined, ignoring\n", name);
422	return 0;
423	} else if (ret < 0) {
424	dev_err(&pdev->dev, "no %s IRQ defined\n", name);
425	return ret;
426	}
427
428	ret = devm_request_threaded_irq(&pdev->dev, ret,
429	NULL, thread_fn,
430	IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
431	"wcnss", wcnss);
432	if (ret)
433	dev_err(&pdev->dev, "request %s IRQ failed\n", name);
434
435	return ret;
436	}
437
438	static int wcnss_alloc_memory_region(struct qcom_wcnss *wcnss)
439	{
440	struct device_node *node;
441	struct resource r;
442	int ret;
443
444	node = of_parse_phandle(wcnss->dev->of_node, "memory-region", 0);
445	if (!node) {
446	dev_err(wcnss->dev, "no memory-region specified\n");
447	return -EINVAL;
448	}
449
450	ret = of_address_to_resource(node, 0, &r);
451	if (ret)
452	return ret;
453
454	wcnss->mem_phys = wcnss->mem_reloc = r.start;
455	wcnss->mem_size = resource_size(&r);
456	wcnss->mem_region = devm_ioremap_wc(wcnss->dev, wcnss->mem_phys, wcnss->mem_size);
457	if (!wcnss->mem_region) {
458	dev_err(wcnss->dev, "unable to map memory region: %pa+%zx\n",
459	&r.start, wcnss->mem_size);
460	return -EBUSY;
461	}
462
463	return 0;
464	}
465
466	static int wcnss_probe(struct platform_device *pdev)
467	{
468	const struct wcnss_data *data;
469	struct qcom_wcnss *wcnss;
470	struct resource *res;
471	struct rproc *rproc;
472	void __iomem *mmio;
473	int ret;
474
475	data = of_device_get_match_data(&pdev->dev);
476
477	if (!qcom_scm_is_available())
478	return -EPROBE_DEFER;
479
480	if (!qcom_scm_pas_supported(WCNSS_PAS_ID)) {
481	dev_err(&pdev->dev, "PAS is not available for WCNSS\n");
482	return -ENXIO;
483	}
484
485	rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
486	WCNSS_FIRMWARE_NAME, sizeof(*wcnss));
487	if (!rproc) {
488	dev_err(&pdev->dev, "unable to allocate remoteproc\n");
489	return -ENOMEM;
490	}
491
aed361ad BA	492	wcnss = (struct qcom_wcnss *)rproc->priv;
	493	wcnss->dev = &pdev->dev;
	494	wcnss->rproc = rproc;
	495	platform_set_drvdata(pdev, wcnss);
	496
	497	init_completion(&wcnss->start_done);
	498	init_completion(&wcnss->stop_done);
	499
	500	mutex_init(&wcnss->iris_lock);
	501
	502	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmu");
	503	mmio = devm_ioremap_resource(&pdev->dev, res);
f4e1f9bb WY	504	if (IS_ERR(mmio)) {
f4e1f9bb WY	505	ret = PTR_ERR(mmio);
aed361ad BA	506	goto free_rproc;
	507	};
	508
	509	ret = wcnss_alloc_memory_region(wcnss);
	510	if (ret)
	511	goto free_rproc;
	512
	513	wcnss->pmu_cfg = mmio + data->pmu_offset;
	514	wcnss->spare_out = mmio + data->spare_offset;
	515
	516	ret = wcnss_init_regulators(wcnss, data->vregs, data->num_vregs);
	517	if (ret)
	518	goto free_rproc;
	519
	520	ret = wcnss_request_irq(wcnss, pdev, "wdog", false, wcnss_wdog_interrupt);
	521	if (ret < 0)
	522	goto free_rproc;
	523	wcnss->wdog_irq = ret;
	524
	525	ret = wcnss_request_irq(wcnss, pdev, "fatal", false, wcnss_fatal_interrupt);
	526	if (ret < 0)
	527	goto free_rproc;
	528	wcnss->fatal_irq = ret;
	529
	530	ret = wcnss_request_irq(wcnss, pdev, "ready", true, wcnss_ready_interrupt);
	531	if (ret < 0)
	532	goto free_rproc;
	533	wcnss->ready_irq = ret;
	534
	535	ret = wcnss_request_irq(wcnss, pdev, "handover", true, wcnss_handover_interrupt);
	536	if (ret < 0)
	537	goto free_rproc;
	538	wcnss->handover_irq = ret;
	539
	540	ret = wcnss_request_irq(wcnss, pdev, "stop-ack", true, wcnss_stop_ack_interrupt);
	541	if (ret < 0)
	542	goto free_rproc;
	543	wcnss->stop_ack_irq = ret;
	544
	545	if (wcnss->stop_ack_irq) {
	546	wcnss->state = qcom_smem_state_get(&pdev->dev, "stop",
	547	&wcnss->stop_bit);
	548	if (IS_ERR(wcnss->state)) {
	549	ret = PTR_ERR(wcnss->state);
	550	goto free_rproc;
	551	}
	552	}
	553
b90fcfcb	554	qcom_add_smd_subdev(rproc, &wcnss->smd_subdev);
1fb82ee8	555	wcnss->sysmon = qcom_add_sysmon_subdev(rproc, "wcnss", WCNSS_SSCTL_ID);
027045a6 SS	556	if (IS_ERR(wcnss->sysmon)) {
	557	ret = PTR_ERR(wcnss->sysmon);
	558	goto free_rproc;
	559	}
5a856bc6	560
aed361ad BA	561	ret = rproc_add(rproc);
	562	if (ret)
	563	goto free_rproc;
	564
	565	return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
	566
	567	free_rproc:
433c0e04	568	rproc_free(rproc);
aed361ad BA	569
	570	return ret;
	571	}
	572
	573	static int wcnss_remove(struct platform_device *pdev)
	574	{
	575	struct qcom_wcnss *wcnss = platform_get_drvdata(pdev);
	576
	577	of_platform_depopulate(&pdev->dev);
	578
	579	qcom_smem_state_put(wcnss->state);
	580	rproc_del(wcnss->rproc);
b90fcfcb	581
1fb82ee8	582	qcom_remove_sysmon_subdev(wcnss->sysmon);
b90fcfcb	583	qcom_remove_smd_subdev(wcnss->rproc, &wcnss->smd_subdev);
433c0e04	584	rproc_free(wcnss->rproc);
aed361ad BA	585
	586	return 0;
	587	}
	588
	589	static const struct of_device_id wcnss_of_match[] = {
	590	{ .compatible = "qcom,riva-pil", &riva_data },
	591	{ .compatible = "qcom,pronto-v1-pil", &pronto_v1_data },
	592	{ .compatible = "qcom,pronto-v2-pil", &pronto_v2_data },
	593	{ },
	594	};
4958aabb	595	MODULE_DEVICE_TABLE(of, wcnss_of_match);
aed361ad BA	596
	597	static struct platform_driver wcnss_driver = {
	598	.probe = wcnss_probe,
	599	.remove = wcnss_remove,
	600	.driver = {
	601	.name = "qcom-wcnss-pil",
	602	.of_match_table = wcnss_of_match,
	603	},
	604	};
	605
6de1a507 BA	606	static int __init wcnss_init(void)
	607	{
	608	int ret;
	609
	610	ret = platform_driver_register(&wcnss_driver);
	611	if (ret)
	612	return ret;
	613
	614	ret = platform_driver_register(&qcom_iris_driver);
	615	if (ret)
	616	platform_driver_unregister(&wcnss_driver);
	617
	618	return ret;
	619	}
	620	module_init(wcnss_init);
	621
	622	static void __exit wcnss_exit(void)
	623	{
	624	platform_driver_unregister(&qcom_iris_driver);
	625	platform_driver_unregister(&wcnss_driver);
	626	}
	627	module_exit(wcnss_exit);
	628
fff7fca5	629	MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Wireless Subsystem");
aed361ad	630	MODULE_LICENSE("GPL v2");