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Release 4.11 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_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;
};


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); }

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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); }

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static const struct rproc_fw_ops wcnss_fw_ops = { .find_rsc_table = qcom_mdt_find_rsc_table, .load = wcnss_load, };
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); }

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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); }

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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; }

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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; }

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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; }

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

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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); if (!IS_ERR(msg)) msg[0] = '\0'; return IRQ_HANDLED; }

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static irqreturn_t wcnss_ready_interrupt(int irq, void *dev) { struct qcom_wcnss *wcnss = dev; complete(&wcnss->start_done); return IRQ_HANDLED; }

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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; }

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static irqreturn_t wcnss_stop_ack_interrupt(int irq, void *dev) { struct qcom_wcnss *wcnss = dev; complete(&wcnss->stop_done); return IRQ_HANDLED; }

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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; }

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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; }

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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; }

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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; } rproc->fw_ops = &wcnss_fw_ops; 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); 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; }

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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_smd_subdev(wcnss->rproc, &wcnss->smd_subdev); rproc_free(wcnss->rproc); return 0; }

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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; }

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

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module_exit(wcnss_exit); MODULE_DESCRIPTION("Qualcomm Peripherial Image Loader for Wireless Subsystem"); MODULE_LICENSE("GPL v2");

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