diff options
Diffstat (limited to 'drivers/remoteproc/qcom_wcnss.c')
| -rw-r--r-- | drivers/remoteproc/qcom_wcnss.c | 624 |
1 files changed, 624 insertions, 0 deletions
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c new file mode 100644 index 000000000000..14c458519f84 --- /dev/null +++ b/drivers/remoteproc/qcom_wcnss.c @@ -0,0 +1,624 @@ +/* + * 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/smem.h> +#include <linux/soc/qcom/smem_state.h> + +#include "qcom_mdt_loader.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; +}; + +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); +} +EXPORT_SYMBOL_GPL(qcom_wcnss_assign_iris); + +static int wcnss_load(struct rproc *rproc, const struct firmware *fw) +{ + struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv; + phys_addr_t fw_addr; + size_t fw_size; + bool relocate; + int ret; + + ret = qcom_scm_pas_init_image(WCNSS_PAS_ID, fw->data, fw->size); + if (ret) { + dev_err(&rproc->dev, "invalid firmware metadata\n"); + return ret; + } + + ret = qcom_mdt_parse(fw, &fw_addr, &fw_size, &relocate); + if (ret) { + dev_err(&rproc->dev, "failed to parse mdt header\n"); + return ret; + } + + if (relocate) { + wcnss->mem_reloc = fw_addr; + + ret = qcom_scm_pas_mem_setup(WCNSS_PAS_ID, wcnss->mem_phys, fw_size); + if (ret) { + dev_err(&rproc->dev, "unable to setup memory for image\n"); + return ret; + } + } + + return qcom_mdt_load(rproc, fw, rproc->firmware); +} + +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); +} + +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, +}; + +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); + + if (!IS_ERR(msg)) + msg[0] = '\0'; + + 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; + } + + 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 (!mmio) { + ret = -ENOMEM; + 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; + } + } + + ret = rproc_add(rproc); + if (ret) + goto free_rproc; + + return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); + +free_rproc: + rproc_put(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); + 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); +MODULE_DESCRIPTION("Qualcomm Peripherial Image Loader for Wireless Subsystem"); +MODULE_LICENSE("GPL v2"); |