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![Bjorn Andersson](/assets/img/avatar_default.png)
The tie between the main WCNSS driver and the IRIS driver causes a
circular dependency between the two modules. Neither part makes sense to
have on their own so lets merge them into one module.
For the sake of picking up the clock and regulator resources described
in the iris of_node we need an associated struct device. But, to keep
the size of the patch down we continue to represent the IRIS part as its
own platform_driver, within the same module, rather than setting up a
dummy device.
Fixes: aed361adca
("remoteproc: qcom: Introduce WCNSS peripheral image loader")
Reported-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
673 lines
16 KiB
C
673 lines
16 KiB
C
/*
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* Qualcomm Wireless Connectivity Subsystem Peripheral Image Loader
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*
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* Copyright (C) 2016 Linaro Ltd
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* Copyright (C) 2014 Sony Mobile Communications AB
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/firmware.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/qcom_scm.h>
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#include <linux/regulator/consumer.h>
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#include <linux/remoteproc.h>
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#include <linux/soc/qcom/smem.h>
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#include <linux/soc/qcom/smem_state.h>
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#include <linux/rpmsg/qcom_smd.h>
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#include "qcom_mdt_loader.h"
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#include "remoteproc_internal.h"
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#include "qcom_wcnss.h"
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#define WCNSS_CRASH_REASON_SMEM 422
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#define WCNSS_FIRMWARE_NAME "wcnss.mdt"
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#define WCNSS_PAS_ID 6
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#define WCNSS_SPARE_NVBIN_DLND BIT(25)
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#define WCNSS_PMU_IRIS_XO_CFG BIT(3)
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#define WCNSS_PMU_IRIS_XO_EN BIT(4)
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#define WCNSS_PMU_GC_BUS_MUX_SEL_TOP BIT(5)
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#define WCNSS_PMU_IRIS_XO_CFG_STS BIT(6) /* 1: in progress, 0: done */
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#define WCNSS_PMU_IRIS_RESET BIT(7)
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#define WCNSS_PMU_IRIS_RESET_STS BIT(8) /* 1: in progress, 0: done */
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#define WCNSS_PMU_IRIS_XO_READ BIT(9)
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#define WCNSS_PMU_IRIS_XO_READ_STS BIT(10)
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#define WCNSS_PMU_XO_MODE_MASK GENMASK(2, 1)
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#define WCNSS_PMU_XO_MODE_19p2 0
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#define WCNSS_PMU_XO_MODE_48 3
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struct wcnss_data {
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size_t pmu_offset;
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size_t spare_offset;
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const struct wcnss_vreg_info *vregs;
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size_t num_vregs;
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};
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struct qcom_wcnss {
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struct device *dev;
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struct rproc *rproc;
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void __iomem *pmu_cfg;
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void __iomem *spare_out;
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bool use_48mhz_xo;
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int wdog_irq;
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int fatal_irq;
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int ready_irq;
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int handover_irq;
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int stop_ack_irq;
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struct qcom_smem_state *state;
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unsigned stop_bit;
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struct mutex iris_lock;
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struct qcom_iris *iris;
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struct regulator_bulk_data *vregs;
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size_t num_vregs;
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struct completion start_done;
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struct completion stop_done;
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phys_addr_t mem_phys;
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phys_addr_t mem_reloc;
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void *mem_region;
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size_t mem_size;
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struct device_node *smd_node;
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struct qcom_smd_edge *smd_edge;
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struct rproc_subdev smd_subdev;
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};
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static const struct wcnss_data riva_data = {
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.pmu_offset = 0x28,
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.spare_offset = 0xb4,
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.vregs = (struct wcnss_vreg_info[]) {
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{ "vddmx", 1050000, 1150000, 0 },
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{ "vddcx", 1050000, 1150000, 0 },
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{ "vddpx", 1800000, 1800000, 0 },
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},
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.num_vregs = 3,
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};
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static const struct wcnss_data pronto_v1_data = {
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.pmu_offset = 0x1004,
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.spare_offset = 0x1088,
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.vregs = (struct wcnss_vreg_info[]) {
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{ "vddmx", 950000, 1150000, 0 },
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{ "vddcx", .super_turbo = true},
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{ "vddpx", 1800000, 1800000, 0 },
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},
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.num_vregs = 3,
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};
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static const struct wcnss_data pronto_v2_data = {
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.pmu_offset = 0x1004,
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.spare_offset = 0x1088,
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.vregs = (struct wcnss_vreg_info[]) {
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{ "vddmx", 1287500, 1287500, 0 },
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{ "vddcx", .super_turbo = true },
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{ "vddpx", 1800000, 1800000, 0 },
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},
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.num_vregs = 3,
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};
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void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss,
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struct qcom_iris *iris,
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bool use_48mhz_xo)
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{
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mutex_lock(&wcnss->iris_lock);
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wcnss->iris = iris;
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wcnss->use_48mhz_xo = use_48mhz_xo;
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mutex_unlock(&wcnss->iris_lock);
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}
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static int wcnss_load(struct rproc *rproc, const struct firmware *fw)
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{
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struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
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phys_addr_t fw_addr;
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size_t fw_size;
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bool relocate;
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int ret;
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ret = qcom_scm_pas_init_image(WCNSS_PAS_ID, fw->data, fw->size);
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if (ret) {
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dev_err(&rproc->dev, "invalid firmware metadata\n");
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return ret;
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}
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ret = qcom_mdt_parse(fw, &fw_addr, &fw_size, &relocate);
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if (ret) {
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dev_err(&rproc->dev, "failed to parse mdt header\n");
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return ret;
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}
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if (relocate) {
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wcnss->mem_reloc = fw_addr;
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ret = qcom_scm_pas_mem_setup(WCNSS_PAS_ID, wcnss->mem_phys, fw_size);
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if (ret) {
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dev_err(&rproc->dev, "unable to setup memory for image\n");
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return ret;
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}
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}
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return qcom_mdt_load(rproc, fw, rproc->firmware);
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}
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static const struct rproc_fw_ops wcnss_fw_ops = {
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.find_rsc_table = qcom_mdt_find_rsc_table,
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.load = wcnss_load,
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};
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static void wcnss_indicate_nv_download(struct qcom_wcnss *wcnss)
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{
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u32 val;
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/* Indicate NV download capability */
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val = readl(wcnss->spare_out);
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val |= WCNSS_SPARE_NVBIN_DLND;
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writel(val, wcnss->spare_out);
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}
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static void wcnss_configure_iris(struct qcom_wcnss *wcnss)
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{
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u32 val;
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/* Clear PMU cfg register */
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writel(0, wcnss->pmu_cfg);
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val = WCNSS_PMU_GC_BUS_MUX_SEL_TOP | WCNSS_PMU_IRIS_XO_EN;
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writel(val, wcnss->pmu_cfg);
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/* Clear XO_MODE */
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val &= ~WCNSS_PMU_XO_MODE_MASK;
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if (wcnss->use_48mhz_xo)
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val |= WCNSS_PMU_XO_MODE_48 << 1;
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else
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val |= WCNSS_PMU_XO_MODE_19p2 << 1;
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writel(val, wcnss->pmu_cfg);
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/* Reset IRIS */
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val |= WCNSS_PMU_IRIS_RESET;
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writel(val, wcnss->pmu_cfg);
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/* Wait for PMU.iris_reg_reset_sts */
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while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_RESET_STS)
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cpu_relax();
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/* Clear IRIS reset */
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val &= ~WCNSS_PMU_IRIS_RESET;
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writel(val, wcnss->pmu_cfg);
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/* Start IRIS XO configuration */
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val |= WCNSS_PMU_IRIS_XO_CFG;
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writel(val, wcnss->pmu_cfg);
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/* Wait for XO configuration to finish */
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while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_XO_CFG_STS)
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cpu_relax();
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/* Stop IRIS XO configuration */
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val &= ~WCNSS_PMU_GC_BUS_MUX_SEL_TOP;
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val &= ~WCNSS_PMU_IRIS_XO_CFG;
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writel(val, wcnss->pmu_cfg);
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/* Add some delay for XO to settle */
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msleep(20);
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}
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static int wcnss_start(struct rproc *rproc)
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{
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struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
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int ret;
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mutex_lock(&wcnss->iris_lock);
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if (!wcnss->iris) {
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dev_err(wcnss->dev, "no iris registered\n");
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ret = -EINVAL;
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goto release_iris_lock;
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}
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ret = regulator_bulk_enable(wcnss->num_vregs, wcnss->vregs);
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if (ret)
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goto release_iris_lock;
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ret = qcom_iris_enable(wcnss->iris);
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if (ret)
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goto disable_regulators;
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wcnss_indicate_nv_download(wcnss);
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wcnss_configure_iris(wcnss);
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ret = qcom_scm_pas_auth_and_reset(WCNSS_PAS_ID);
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if (ret) {
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dev_err(wcnss->dev,
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"failed to authenticate image and release reset\n");
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goto disable_iris;
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}
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ret = wait_for_completion_timeout(&wcnss->start_done,
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msecs_to_jiffies(5000));
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if (wcnss->ready_irq > 0 && ret == 0) {
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/* We have a ready_irq, but it didn't fire in time. */
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dev_err(wcnss->dev, "start timed out\n");
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qcom_scm_pas_shutdown(WCNSS_PAS_ID);
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ret = -ETIMEDOUT;
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goto disable_iris;
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}
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ret = 0;
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disable_iris:
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qcom_iris_disable(wcnss->iris);
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disable_regulators:
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regulator_bulk_disable(wcnss->num_vregs, wcnss->vregs);
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release_iris_lock:
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mutex_unlock(&wcnss->iris_lock);
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return ret;
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}
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static int wcnss_stop(struct rproc *rproc)
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{
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struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
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int ret;
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if (wcnss->state) {
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qcom_smem_state_update_bits(wcnss->state,
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BIT(wcnss->stop_bit),
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BIT(wcnss->stop_bit));
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ret = wait_for_completion_timeout(&wcnss->stop_done,
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msecs_to_jiffies(5000));
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if (ret == 0)
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dev_err(wcnss->dev, "timed out on wait\n");
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qcom_smem_state_update_bits(wcnss->state,
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BIT(wcnss->stop_bit),
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0);
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}
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ret = qcom_scm_pas_shutdown(WCNSS_PAS_ID);
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if (ret)
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dev_err(wcnss->dev, "failed to shutdown: %d\n", ret);
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return ret;
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}
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static void *wcnss_da_to_va(struct rproc *rproc, u64 da, int len)
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{
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struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
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int offset;
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offset = da - wcnss->mem_reloc;
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if (offset < 0 || offset + len > wcnss->mem_size)
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return NULL;
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return wcnss->mem_region + offset;
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}
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static const struct rproc_ops wcnss_ops = {
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.start = wcnss_start,
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.stop = wcnss_stop,
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.da_to_va = wcnss_da_to_va,
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};
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static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
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{
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struct qcom_wcnss *wcnss = dev;
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rproc_report_crash(wcnss->rproc, RPROC_WATCHDOG);
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return IRQ_HANDLED;
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}
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static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
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{
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struct qcom_wcnss *wcnss = dev;
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size_t len;
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char *msg;
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msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, WCNSS_CRASH_REASON_SMEM, &len);
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if (!IS_ERR(msg) && len > 0 && msg[0])
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dev_err(wcnss->dev, "fatal error received: %s\n", msg);
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rproc_report_crash(wcnss->rproc, RPROC_FATAL_ERROR);
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if (!IS_ERR(msg))
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msg[0] = '\0';
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return IRQ_HANDLED;
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}
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static irqreturn_t wcnss_ready_interrupt(int irq, void *dev)
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{
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struct qcom_wcnss *wcnss = dev;
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complete(&wcnss->start_done);
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return IRQ_HANDLED;
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}
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static irqreturn_t wcnss_handover_interrupt(int irq, void *dev)
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{
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/*
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* XXX: At this point we're supposed to release the resources that we
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* have been holding on behalf of the WCNSS. Unfortunately this
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* interrupt comes way before the other side seems to be done.
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*
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* So we're currently relying on the ready interrupt firing later then
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* this and we just disable the resources at the end of wcnss_start().
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*/
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return IRQ_HANDLED;
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}
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static irqreturn_t wcnss_stop_ack_interrupt(int irq, void *dev)
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{
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struct qcom_wcnss *wcnss = dev;
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complete(&wcnss->stop_done);
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return IRQ_HANDLED;
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}
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static int wcnss_smd_probe(struct rproc_subdev *subdev)
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{
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struct qcom_wcnss *wcnss = container_of(subdev, struct qcom_wcnss, smd_subdev);
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wcnss->smd_edge = qcom_smd_register_edge(wcnss->dev, wcnss->smd_node);
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return IS_ERR(wcnss->smd_edge) ? PTR_ERR(wcnss->smd_edge) : 0;
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}
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static void wcnss_smd_remove(struct rproc_subdev *subdev)
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{
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struct qcom_wcnss *wcnss = container_of(subdev, struct qcom_wcnss, smd_subdev);
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qcom_smd_unregister_edge(wcnss->smd_edge);
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wcnss->smd_edge = NULL;
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}
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static int wcnss_init_regulators(struct qcom_wcnss *wcnss,
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const struct wcnss_vreg_info *info,
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int num_vregs)
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{
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struct regulator_bulk_data *bulk;
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int ret;
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int i;
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bulk = devm_kcalloc(wcnss->dev,
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num_vregs, sizeof(struct regulator_bulk_data),
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GFP_KERNEL);
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if (!bulk)
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return -ENOMEM;
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for (i = 0; i < num_vregs; i++)
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bulk[i].supply = info[i].name;
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ret = devm_regulator_bulk_get(wcnss->dev, num_vregs, bulk);
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if (ret)
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return ret;
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for (i = 0; i < num_vregs; i++) {
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if (info[i].max_voltage)
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regulator_set_voltage(bulk[i].consumer,
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info[i].min_voltage,
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info[i].max_voltage);
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if (info[i].load_uA)
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regulator_set_load(bulk[i].consumer, info[i].load_uA);
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}
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wcnss->vregs = bulk;
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wcnss->num_vregs = num_vregs;
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return 0;
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}
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static int wcnss_request_irq(struct qcom_wcnss *wcnss,
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struct platform_device *pdev,
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const char *name,
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bool optional,
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irq_handler_t thread_fn)
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{
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int ret;
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ret = platform_get_irq_byname(pdev, name);
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if (ret < 0 && optional) {
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dev_dbg(&pdev->dev, "no %s IRQ defined, ignoring\n", name);
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return 0;
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} else if (ret < 0) {
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dev_err(&pdev->dev, "no %s IRQ defined\n", name);
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return ret;
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}
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ret = devm_request_threaded_irq(&pdev->dev, ret,
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NULL, thread_fn,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"wcnss", wcnss);
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if (ret)
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dev_err(&pdev->dev, "request %s IRQ failed\n", name);
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return ret;
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}
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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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
wcnss->smd_node = of_get_child_by_name(pdev->dev.of_node, "smd-edge");
|
|
if (wcnss->smd_node)
|
|
rproc_add_subdev(rproc, &wcnss->smd_subdev, wcnss_smd_probe, wcnss_smd_remove);
|
|
|
|
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);
|
|
|
|
of_node_put(wcnss->smd_node);
|
|
qcom_smem_state_put(wcnss->state);
|
|
rproc_del(wcnss->rproc);
|
|
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 Peripherial Image Loader for Wireless Subsystem");
|
|
MODULE_LICENSE("GPL v2");
|