| Message ID | 1467147506-753-2-git-send-email-bjorn.andersson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tuesday, June 28, 2016 1:58:26 PM CEST Bjorn Andersson wrote: > > +config QCOM_WCNSS_PIL > + tristate "Qualcomm WCNSS Peripheral Image Loader" > + depends on OF && ARCH_QCOM > + select QCOM_MDT_LOADER > + select QCOM_SCM > + select REMOTEPROC > + help > + Say y here to support the Peripherial Image Loader for the Qualcomm > + Wireless Connectivity Subsystem. > + > "depends on QCOM_SMEM" This showed up in Linux-next today and caused a build error: drivers/remoteproc/built-in.o: In function `q6v5_fatal_interrupt': qcom_q6v5_pil.c:(.text+0x2428): undefined reference to `qcom_smem_get' drivers/remoteproc/built-in.o: In function `q6v5_wdog_interrupt': qcom_q6v5_pil.c:(.text+0x2498): undefined reference to `qcom_smem_get' Arnd
On Tue 28 Jun 14:05 PDT 2016, Arnd Bergmann wrote: > On Tuesday, June 28, 2016 1:58:26 PM CEST Bjorn Andersson wrote: > > > > +config QCOM_WCNSS_PIL > > + tristate "Qualcomm WCNSS Peripheral Image Loader" > > + depends on OF && ARCH_QCOM > > + select QCOM_MDT_LOADER > > + select QCOM_SCM > > + select REMOTEPROC > > + help > > + Say y here to support the Peripherial Image Loader for the Qualcomm > > + Wireless Connectivity Subsystem. > > + > > > > "depends on QCOM_SMEM" > > This showed up in Linux-next today and caused a build error: > > drivers/remoteproc/built-in.o: In function `q6v5_fatal_interrupt': > qcom_q6v5_pil.c:(.text+0x2428): undefined reference to `qcom_smem_get' > drivers/remoteproc/built-in.o: In function `q6v5_wdog_interrupt': > qcom_q6v5_pil.c:(.text+0x2498): undefined reference to `qcom_smem_get' > I was convinced I had stubs for those, sorry for not making sure. I amended rproc-next with this. Thanks, Bjorn
Hi Bjorn, Few comments below, On 28/06/16 21:58, Bjorn Andersson wrote: > From: Bjorn Andersson <bjorn.andersson@sonymobile.com> > > 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. > > Tested-by: John Stultz <john.stultz@linaro.org> > Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > > Changes since v2: > - Aligning with changed done to mdt_loader in Hexagon series > - Minor cleanups based on comments > - Added MODULE_DESCRIPTION and MODULE_LICENSE > > drivers/remoteproc/Kconfig | 10 + > drivers/remoteproc/Makefile | 1 + > drivers/remoteproc/qcom_wcnss.c | 622 +++++++++++++++++++++++++++++++++++ > drivers/remoteproc/qcom_wcnss.h | 23 ++ > drivers/remoteproc/qcom_wcnss_iris.c | 187 +++++++++++ > 5 files changed, 843 insertions(+) > create mode 100644 drivers/remoteproc/qcom_wcnss.c > create mode 100644 drivers/remoteproc/qcom_wcnss.h > create mode 100644 drivers/remoteproc/qcom_wcnss_iris.c checkpatch reports: total: 0 errors, 16 warnings, 853 lines checked > > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > index 7c9fa6906f94..898820350cb6 100644 > --- a/drivers/remoteproc/Kconfig > +++ b/drivers/remoteproc/Kconfig > @@ -90,6 +90,16 @@ config QCOM_Q6V5_PIL > Say y here to support the Qualcomm Peripherial Image Loader for the > Hexagon V5 based remote processors. > > +config QCOM_WCNSS_PIL > + tristate "Qualcomm WCNSS Peripheral Image Loader" Some of the symbols needs exporting, If you build these as modules, you would end up with below errors. ERROR: "qcom_wcnss_assign_iris" [drivers/remoteproc/qcom_wcnss_iris.ko] undefined! ERROR: "qcom_iris_disable" [drivers/remoteproc/qcom_wcnss.ko] undefined! ERROR: "qcom_iris_enable" [drivers/remoteproc/qcom_wcnss.ko] undefined! /workspace/linaro/dev/scripts/Makefile.modpost:91: recipe for target '__modpost' failed make[2]: *** [__modpost] Error 1 > + depends on OF && ARCH_QCOM > + select QCOM_MDT_LOADER > + select QCOM_SCM > + select REMOTEPROC > + help > + Say y here to support the Peripherial Image Loader for the Qualcomm > + Wireless Connectivity Subsystem. s/Peripherial/Peripheral > + > config ST_REMOTEPROC > tristate "ST remoteproc support" > depends on ARCH_STI > diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile > index 92d3758bd15c..eedcce54667d 100644 > --- a/drivers/remoteproc/Makefile > +++ b/drivers/remoteproc/Makefile > @@ -13,4 +13,5 @@ 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_Q6V5_PIL) += qcom_q6v5_pil.o > +obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o qcom_wcnss_iris.o May be we should have two symbols here, one for wcnss and other for wcnss_iris. > obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c > new file mode 100644 > index 000000000000..e624fb255c9e > --- /dev/null > +++ b/drivers/remoteproc/qcom_wcnss.c > @@ -0,0 +1,622 @@ > +/* > + * Qualcomm 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 > + > +static const struct rproc_ops wcnss_ops; Do you need this here? > + > +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 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 -EINVAL; Should we not return the the actual error code here? > + } > + > + 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 relocation\n"); > + return -EINVAL; Same as above.. > + } > + } > + > + 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 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 XXX ??? > + * 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); Adding line before return on all the functions would make code more readable, Or atleast consistency across driver would be nice. > + 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); Error handling seems missing here. > + > + if (info[i].load_uA) > + regulator_set_load(bulk[i].consumer, info[i].load_uA); same.. > + } > + > + 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; I cant see this call implemented in mainline yet. > + > + 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); Some of these lines are over 80 chars.. > + if (ret < 0) > + goto free_rproc; \n > + 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"); > diff --git a/drivers/remoteproc/qcom_wcnss.h b/drivers/remoteproc/qcom_wcnss.h > new file mode 100644 > index 000000000000..bb4f042cb5a0 > --- /dev/null > +++ b/drivers/remoteproc/qcom_wcnss.h > @@ -0,0 +1,23 @@ > +#ifndef __QCOM_WNCSS_H__ > +#define __QCOM_WNCSS_H__ > + > +struct qcom_iris; > +struct qcom_wcnss; > + > +struct wcnss_vreg_info { > + const char * const name; > + int min_voltage; > + int max_voltage; > + > + int load_uA; > + > + bool super_turbo; > +}; > + > +int qcom_iris_enable(struct qcom_iris *iris); > +void qcom_iris_disable(struct qcom_iris *iris); > + > +void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, struct qcom_iris *iris, > + bool use_48mhz_xo); Dummy functions? > + > +#endif > diff --git a/drivers/remoteproc/qcom_wcnss_iris.c b/drivers/remoteproc/qcom_wcnss_iris.c > new file mode 100644 > index 000000000000..af48281c1728 > --- /dev/null > +++ b/drivers/remoteproc/qcom_wcnss_iris.c > @@ -0,0 +1,187 @@ > +/* > + * Qualcomm 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/kernel.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/qcom_scm.h> ?? > +#include <linux/regulator/consumer.h> > + > +#include "qcom_wcnss.h" > + > +struct qcom_iris { > + struct device *dev; > + > + struct clk *xo_clk; > + > + struct regulator_bulk_data *vregs; > + size_t num_vregs; > +}; > + > +struct iris_data { > + const struct wcnss_vreg_info *vregs; > + size_t num_vregs; > + > + bool use_48mhz_xo; > +}; > + > +static const struct iris_data wcn3620_data = { > + .vregs = (struct wcnss_vreg_info[]) { > + { "vddxo", 1800000, 1800000, 10000 }, > + { "vddrfa", 1300000, 1300000, 100000 }, > + { "vddpa", 3300000, 3300000, 515000 }, > + { "vdddig", 1800000, 1800000, 10000 }, > + }, > + .num_vregs = 4, > + .use_48mhz_xo = false, > +}; > + > +static const struct iris_data wcn3660_data = { > + .vregs = (struct wcnss_vreg_info[]) { > + { "vddxo", 1800000, 1800000, 10000 }, > + { "vddrfa", 1300000, 1300000, 100000 }, > + { "vddpa", 2900000, 3000000, 515000 }, > + { "vdddig", 1200000, 1225000, 10000 }, > + }, > + .num_vregs = 4, > + .use_48mhz_xo = true, > +}; > + > +static const struct iris_data wcn3680_data = { > + .vregs = (struct wcnss_vreg_info[]) { > + { "vddxo", 1800000, 1800000, 10000 }, > + { "vddrfa", 1300000, 1300000, 100000 }, > + { "vddpa", 3300000, 3300000, 515000 }, > + { "vdddig", 1800000, 1800000, 10000 }, > + }, > + .num_vregs = 4, > + .use_48mhz_xo = true, > +}; > + > +int qcom_iris_enable(struct qcom_iris *iris) > +{ > + int ret; > + > + ret = regulator_bulk_enable(iris->num_vregs, iris->vregs); > + if (ret) > + return ret; > + > + ret = clk_prepare_enable(iris->xo_clk); > + if (ret) { > + dev_err(iris->dev, "failed to enable xo clk\n"); > + goto disable_regulators; > + } > + > + return 0; > + > +disable_regulators: > + regulator_bulk_disable(iris->num_vregs, iris->vregs); > + > + return ret; > +} > + EXPORT the symbol?? > +void qcom_iris_disable(struct qcom_iris *iris) > +{ > + clk_disable_unprepare(iris->xo_clk); > + regulator_bulk_disable(iris->num_vregs, iris->vregs); > +} EXPORT the symbol?? > + > +static int qcom_iris_probe(struct platform_device *pdev) > +{ > + const struct iris_data *data; > + struct qcom_wcnss *wcnss; > + struct qcom_iris *iris; > + int ret; > + int i; > + > + iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL); > + if (!iris) > + return -ENOMEM; > + > + data = of_device_get_match_data(&pdev->dev); > + wcnss = dev_get_drvdata(pdev->dev.parent); > + > + iris->xo_clk = devm_clk_get(&pdev->dev, "xo"); > + if (IS_ERR(iris->xo_clk)) { > + if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER) > + dev_err(&pdev->dev, "failed to acquire xo clk\n"); > + return PTR_ERR(iris->xo_clk); > + } > + > + iris->num_vregs = data->num_vregs; > + iris->vregs = devm_kcalloc(&pdev->dev, > + iris->num_vregs, > + sizeof(struct regulator_bulk_data), > + GFP_KERNEL); > + if (!iris->vregs) > + return -ENOMEM; > + > + for (i = 0; i < iris->num_vregs; i++) > + iris->vregs[i].supply = data->vregs[i].name; > + > + ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs); > + if (ret) { > + dev_err(&pdev->dev, "failed to get regulators\n"); > + return ret; > + } > + > + for (i = 0; i < iris->num_vregs; i++) { > + if (data->vregs[i].max_voltage) > + regulator_set_voltage(iris->vregs[i].consumer, > + data->vregs[i].min_voltage, > + data->vregs[i].max_voltage); > + > + if (data->vregs[i].load_uA) > + regulator_set_load(iris->vregs[i].consumer, > + data->vregs[i].load_uA); > + } > + > + qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo); > + > + return 0; > +} > + > +static int qcom_iris_remove(struct platform_device *pdev) > +{ > + struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent); > + > + qcom_wcnss_assign_iris(wcnss, NULL, false); > + > + return 0; > +} > + > +static const struct of_device_id iris_of_match[] = { > + { .compatible = "qcom,wcn3620", .data = &wcn3620_data }, > + { .compatible = "qcom,wcn3660", .data = &wcn3660_data }, > + { .compatible = "qcom,wcn3680", .data = &wcn3680_data }, > + {} > +}; > + > +static struct platform_driver qcom_iris_driver = { > + .probe = qcom_iris_probe, > + .remove = qcom_iris_remove, > + .driver = { > + .name = "qcom-iris", > + .of_match_table = iris_of_match, > + }, > +}; > + > +module_platform_driver(qcom_iris_driver); > +MODULE_DESCRIPTION("Qualcomm Wireless Subsystem Iris driver"); > +MODULE_LICENSE("GPL v2"); >
On Wed 29 Jun 09:26 PDT 2016, Srinivas Kandagatla wrote: > Hi Bjorn, > > Few comments below, > Thanks! > On 28/06/16 21:58, Bjorn Andersson wrote: [..] > > checkpatch reports: > total: 0 errors, 16 warnings, 853 lines checked > Yeah, there's 16 cases left where I think it's worth going a few chars over 80 to keep the code readable... > > > > >diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig > >index 7c9fa6906f94..898820350cb6 100644 > >--- a/drivers/remoteproc/Kconfig > >+++ b/drivers/remoteproc/Kconfig > >@@ -90,6 +90,16 @@ config QCOM_Q6V5_PIL > > Say y here to support the Qualcomm Peripherial Image Loader for the > > Hexagon V5 based remote processors. > > > >+config QCOM_WCNSS_PIL > >+ tristate "Qualcomm WCNSS Peripheral Image Loader" > > Some of the symbols needs exporting, > If you build these as modules, you would end up with below errors. > > > ERROR: "qcom_wcnss_assign_iris" [drivers/remoteproc/qcom_wcnss_iris.ko] > undefined! > ERROR: "qcom_iris_disable" [drivers/remoteproc/qcom_wcnss.ko] undefined! > ERROR: "qcom_iris_enable" [drivers/remoteproc/qcom_wcnss.ko] undefined! > /workspace/linaro/dev/scripts/Makefile.modpost:91: recipe for target > '__modpost' failed > make[2]: *** [__modpost] Error 1 > I was expecting qcom_wcnss.c and qcom_wcnss_iris.c to be compiled into the same kernel module, so this should not be the case. I will have a look. > > > >+ depends on OF && ARCH_QCOM > >+ select QCOM_MDT_LOADER > >+ select QCOM_SCM > >+ select REMOTEPROC > >+ help > >+ Say y here to support the Peripherial Image Loader for the Qualcomm > >+ Wireless Connectivity Subsystem. > > s/Peripherial/Peripheral > Thanks > >+ > > config ST_REMOTEPROC > > tristate "ST remoteproc support" > > depends on ARCH_STI > >diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile [..] > >+obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o qcom_wcnss_iris.o > > May be we should have two symbols here, one for wcnss and other for > wcnss_iris. > I should define these two such that they will be linked into the same module; as there's no reason to have either one without the other. Thanks for spotting this. > > obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o > >diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c [.] > >+static const struct rproc_ops wcnss_ops; > Do you need this here? > Not any more, thanks. > >+ [..] > >+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 -EINVAL; > Should we not return the the actual error code here? > I see no harm in doing so, I'll update it. > >+ } > >+ > >+ 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 relocation\n"); > >+ return -EINVAL; > > Same as above.. Dito > >+ } > >+ } > >+ > >+ return qcom_mdt_load(rproc, fw, rproc->firmware); > >+} > >+ [..] > >+static irqreturn_t wcnss_handover_interrupt(int irq, void *dev) > >+{ > >+ /* > >+ * XXX: At this point we're supposed to release the resources that we > XXX ??? > This comment describes a discrepancy from the way these things should be handled and the way I interpret the caf code, as such I think the code warrants the tag Wikipedia describes as: "XXX - warn other programmers of problematic or misguiding code" See https://en.wikipedia.org/wiki/Comment_(computer_programming) > >+ * 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); > Adding line before return on all the functions would make code more > readable, Or atleast consistency across driver would be nice. Ok > >+ 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); > > Error handling seems missing here. > I just assumed that if it works it works, will look into this further and make sure we're doing the right thing here. > >+ > >+ if (info[i].load_uA) > >+ regulator_set_load(bulk[i].consumer, info[i].load_uA); > same.. > > >+ } > >+ > >+ wcnss->vregs = bulk; > >+ wcnss->num_vregs = num_vregs; > >+ > >+ 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; > > I cant see this call implemented in mainline yet. > No, I noticed that as well when compiling this before sending it out. So I've poked Andy about that. > >+ > >+ 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); > Some of these lines are over 80 chars.. > I prefer to shoot a little bit over here to keep the code cleaner. > >+ if (ret < 0) > >+ goto free_rproc; > > \n > Ok > >+ 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; > >+} > >+ [..] > >diff --git a/drivers/remoteproc/qcom_wcnss.h b/drivers/remoteproc/qcom_wcnss.h [..] > >+ > >+int qcom_iris_enable(struct qcom_iris *iris); > >+void qcom_iris_disable(struct qcom_iris *iris); > >+ > >+void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, struct qcom_iris *iris, > >+ bool use_48mhz_xo); > > Dummy functions? > No these functions are the api inbetween the wcnss and iris parts of the driver, the latter for the iris to tie the two together upon successfully acquiring its resources and the prior for enabling and disabling these resources. > >+ > >+#endif > >diff --git a/drivers/remoteproc/qcom_wcnss_iris.c b/drivers/remoteproc/qcom_wcnss_iris.c [..] > >+#include <linux/qcom_scm.h> > ?? > scm is a leftover from splitting the driver in two files, will drop. [..] > >+int qcom_iris_enable(struct qcom_iris *iris) > >+{ > >+ int ret; > >+ > >+ ret = regulator_bulk_enable(iris->num_vregs, iris->vregs); > >+ if (ret) > >+ return ret; > >+ > >+ ret = clk_prepare_enable(iris->xo_clk); > >+ if (ret) { > >+ dev_err(iris->dev, "failed to enable xo clk\n"); > >+ goto disable_regulators; > >+ } > >+ > >+ return 0; > >+ > >+disable_regulators: > >+ regulator_bulk_disable(iris->num_vregs, iris->vregs); > >+ > >+ return ret; > >+} > >+ > EXPORT the symbol?? No, it doesn't make sense for either part of this driver to be compiled standalone, as such this function should not be called from an outside kernel module. > >+void qcom_iris_disable(struct qcom_iris *iris) > >+{ > >+ clk_disable_unprepare(iris->xo_clk); > >+ regulator_bulk_disable(iris->num_vregs, iris->vregs); > >+} > EXPORT the symbol?? Dito > >+ Again, thanks for the review. Regards, Bjorn
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 7c9fa6906f94..898820350cb6 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -90,6 +90,16 @@ config QCOM_Q6V5_PIL Say y here to support the Qualcomm Peripherial Image Loader for the Hexagon V5 based remote processors. +config QCOM_WCNSS_PIL + tristate "Qualcomm WCNSS Peripheral Image Loader" + depends on OF && ARCH_QCOM + select QCOM_MDT_LOADER + select QCOM_SCM + select REMOTEPROC + help + Say y here to support the Peripherial Image Loader for the Qualcomm + Wireless Connectivity Subsystem. + config ST_REMOTEPROC tristate "ST remoteproc support" depends on ARCH_STI diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 92d3758bd15c..eedcce54667d 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -13,4 +13,5 @@ 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_Q6V5_PIL) += qcom_q6v5_pil.o +obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o qcom_wcnss_iris.o obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c new file mode 100644 index 000000000000..e624fb255c9e --- /dev/null +++ b/drivers/remoteproc/qcom_wcnss.c @@ -0,0 +1,622 @@ +/* + * Qualcomm 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 + +static const struct rproc_ops wcnss_ops; + +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); +} + +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 -EINVAL; + } + + 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 relocation\n"); + return -EINVAL; + } + } + + 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"); diff --git a/drivers/remoteproc/qcom_wcnss.h b/drivers/remoteproc/qcom_wcnss.h new file mode 100644 index 000000000000..bb4f042cb5a0 --- /dev/null +++ b/drivers/remoteproc/qcom_wcnss.h @@ -0,0 +1,23 @@ +#ifndef __QCOM_WNCSS_H__ +#define __QCOM_WNCSS_H__ + +struct qcom_iris; +struct qcom_wcnss; + +struct wcnss_vreg_info { + const char * const name; + int min_voltage; + int max_voltage; + + int load_uA; + + bool super_turbo; +}; + +int qcom_iris_enable(struct qcom_iris *iris); +void qcom_iris_disable(struct qcom_iris *iris); + +void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, struct qcom_iris *iris, + bool use_48mhz_xo); + +#endif diff --git a/drivers/remoteproc/qcom_wcnss_iris.c b/drivers/remoteproc/qcom_wcnss_iris.c new file mode 100644 index 000000000000..af48281c1728 --- /dev/null +++ b/drivers/remoteproc/qcom_wcnss_iris.c @@ -0,0 +1,187 @@ +/* + * Qualcomm 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/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/qcom_scm.h> +#include <linux/regulator/consumer.h> + +#include "qcom_wcnss.h" + +struct qcom_iris { + struct device *dev; + + struct clk *xo_clk; + + struct regulator_bulk_data *vregs; + size_t num_vregs; +}; + +struct iris_data { + const struct wcnss_vreg_info *vregs; + size_t num_vregs; + + bool use_48mhz_xo; +}; + +static const struct iris_data wcn3620_data = { + .vregs = (struct wcnss_vreg_info[]) { + { "vddxo", 1800000, 1800000, 10000 }, + { "vddrfa", 1300000, 1300000, 100000 }, + { "vddpa", 3300000, 3300000, 515000 }, + { "vdddig", 1800000, 1800000, 10000 }, + }, + .num_vregs = 4, + .use_48mhz_xo = false, +}; + +static const struct iris_data wcn3660_data = { + .vregs = (struct wcnss_vreg_info[]) { + { "vddxo", 1800000, 1800000, 10000 }, + { "vddrfa", 1300000, 1300000, 100000 }, + { "vddpa", 2900000, 3000000, 515000 }, + { "vdddig", 1200000, 1225000, 10000 }, + }, + .num_vregs = 4, + .use_48mhz_xo = true, +}; + +static const struct iris_data wcn3680_data = { + .vregs = (struct wcnss_vreg_info[]) { + { "vddxo", 1800000, 1800000, 10000 }, + { "vddrfa", 1300000, 1300000, 100000 }, + { "vddpa", 3300000, 3300000, 515000 }, + { "vdddig", 1800000, 1800000, 10000 }, + }, + .num_vregs = 4, + .use_48mhz_xo = true, +}; + +int qcom_iris_enable(struct qcom_iris *iris) +{ + int ret; + + ret = regulator_bulk_enable(iris->num_vregs, iris->vregs); + if (ret) + return ret; + + ret = clk_prepare_enable(iris->xo_clk); + if (ret) { + dev_err(iris->dev, "failed to enable xo clk\n"); + goto disable_regulators; + } + + return 0; + +disable_regulators: + regulator_bulk_disable(iris->num_vregs, iris->vregs); + + return ret; +} + +void qcom_iris_disable(struct qcom_iris *iris) +{ + clk_disable_unprepare(iris->xo_clk); + regulator_bulk_disable(iris->num_vregs, iris->vregs); +} + +static int qcom_iris_probe(struct platform_device *pdev) +{ + const struct iris_data *data; + struct qcom_wcnss *wcnss; + struct qcom_iris *iris; + int ret; + int i; + + iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL); + if (!iris) + return -ENOMEM; + + data = of_device_get_match_data(&pdev->dev); + wcnss = dev_get_drvdata(pdev->dev.parent); + + iris->xo_clk = devm_clk_get(&pdev->dev, "xo"); + if (IS_ERR(iris->xo_clk)) { + if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER) + dev_err(&pdev->dev, "failed to acquire xo clk\n"); + return PTR_ERR(iris->xo_clk); + } + + iris->num_vregs = data->num_vregs; + iris->vregs = devm_kcalloc(&pdev->dev, + iris->num_vregs, + sizeof(struct regulator_bulk_data), + GFP_KERNEL); + if (!iris->vregs) + return -ENOMEM; + + for (i = 0; i < iris->num_vregs; i++) + iris->vregs[i].supply = data->vregs[i].name; + + ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs); + if (ret) { + dev_err(&pdev->dev, "failed to get regulators\n"); + return ret; + } + + for (i = 0; i < iris->num_vregs; i++) { + if (data->vregs[i].max_voltage) + regulator_set_voltage(iris->vregs[i].consumer, + data->vregs[i].min_voltage, + data->vregs[i].max_voltage); + + if (data->vregs[i].load_uA) + regulator_set_load(iris->vregs[i].consumer, + data->vregs[i].load_uA); + } + + qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo); + + return 0; +} + +static int qcom_iris_remove(struct platform_device *pdev) +{ + struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent); + + qcom_wcnss_assign_iris(wcnss, NULL, false); + + return 0; +} + +static const struct of_device_id iris_of_match[] = { + { .compatible = "qcom,wcn3620", .data = &wcn3620_data }, + { .compatible = "qcom,wcn3660", .data = &wcn3660_data }, + { .compatible = "qcom,wcn3680", .data = &wcn3680_data }, + {} +}; + +static struct platform_driver qcom_iris_driver = { + .probe = qcom_iris_probe, + .remove = qcom_iris_remove, + .driver = { + .name = "qcom-iris", + .of_match_table = iris_of_match, + }, +}; + +module_platform_driver(qcom_iris_driver); +MODULE_DESCRIPTION("Qualcomm Wireless Subsystem Iris driver"); +MODULE_LICENSE("GPL v2");