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![Bjorn Andersson](/assets/img/avatar_default.png)
Move the SMD edge handling to the Qualcomm common file to make it reusable for other Qualcomm remoteproc drivers. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
629 lines
14 KiB
C
629 lines
14 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/mdt_loader.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_common.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 qcom_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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return qcom_mdt_load(wcnss->dev, fw, rproc->firmware, WCNSS_PAS_ID,
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wcnss->mem_region, wcnss->mem_phys, wcnss->mem_size);
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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_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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|
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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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|
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return ret;
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}
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|
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static int wcnss_alloc_memory_region(struct qcom_wcnss *wcnss)
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{
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struct device_node *node;
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struct resource r;
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int ret;
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node = of_parse_phandle(wcnss->dev->of_node, "memory-region", 0);
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if (!node) {
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dev_err(wcnss->dev, "no memory-region specified\n");
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return -EINVAL;
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}
|
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ret = of_address_to_resource(node, 0, &r);
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if (ret)
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return ret;
|
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|
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wcnss->mem_phys = wcnss->mem_reloc = r.start;
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wcnss->mem_size = resource_size(&r);
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wcnss->mem_region = devm_ioremap_wc(wcnss->dev, wcnss->mem_phys, wcnss->mem_size);
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if (!wcnss->mem_region) {
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dev_err(wcnss->dev, "unable to map memory region: %pa+%zx\n",
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&r.start, wcnss->mem_size);
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return -EBUSY;
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}
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return 0;
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}
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|
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static int wcnss_probe(struct platform_device *pdev)
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{
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const struct wcnss_data *data;
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struct qcom_wcnss *wcnss;
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struct resource *res;
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struct rproc *rproc;
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void __iomem *mmio;
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int ret;
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data = of_device_get_match_data(&pdev->dev);
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|
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if (!qcom_scm_is_available())
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return -EPROBE_DEFER;
|
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|
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if (!qcom_scm_pas_supported(WCNSS_PAS_ID)) {
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dev_err(&pdev->dev, "PAS is not available for WCNSS\n");
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return -ENXIO;
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}
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rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
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WCNSS_FIRMWARE_NAME, sizeof(*wcnss));
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if (!rproc) {
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dev_err(&pdev->dev, "unable to allocate remoteproc\n");
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return -ENOMEM;
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}
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|
|
rproc->fw_ops = &wcnss_fw_ops;
|
|
|
|
wcnss = (struct qcom_wcnss *)rproc->priv;
|
|
wcnss->dev = &pdev->dev;
|
|
wcnss->rproc = rproc;
|
|
platform_set_drvdata(pdev, wcnss);
|
|
|
|
init_completion(&wcnss->start_done);
|
|
init_completion(&wcnss->stop_done);
|
|
|
|
mutex_init(&wcnss->iris_lock);
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmu");
|
|
mmio = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(mmio)) {
|
|
ret = PTR_ERR(mmio);
|
|
goto free_rproc;
|
|
};
|
|
|
|
ret = wcnss_alloc_memory_region(wcnss);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
wcnss->pmu_cfg = mmio + data->pmu_offset;
|
|
wcnss->spare_out = mmio + data->spare_offset;
|
|
|
|
ret = wcnss_init_regulators(wcnss, data->vregs, data->num_vregs);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
ret = wcnss_request_irq(wcnss, pdev, "wdog", false, wcnss_wdog_interrupt);
|
|
if (ret < 0)
|
|
goto free_rproc;
|
|
wcnss->wdog_irq = ret;
|
|
|
|
ret = wcnss_request_irq(wcnss, pdev, "fatal", false, wcnss_fatal_interrupt);
|
|
if (ret < 0)
|
|
goto free_rproc;
|
|
wcnss->fatal_irq = ret;
|
|
|
|
ret = wcnss_request_irq(wcnss, pdev, "ready", true, wcnss_ready_interrupt);
|
|
if (ret < 0)
|
|
goto free_rproc;
|
|
wcnss->ready_irq = ret;
|
|
|
|
ret = wcnss_request_irq(wcnss, pdev, "handover", true, wcnss_handover_interrupt);
|
|
if (ret < 0)
|
|
goto free_rproc;
|
|
wcnss->handover_irq = ret;
|
|
|
|
ret = wcnss_request_irq(wcnss, pdev, "stop-ack", true, wcnss_stop_ack_interrupt);
|
|
if (ret < 0)
|
|
goto free_rproc;
|
|
wcnss->stop_ack_irq = ret;
|
|
|
|
if (wcnss->stop_ack_irq) {
|
|
wcnss->state = qcom_smem_state_get(&pdev->dev, "stop",
|
|
&wcnss->stop_bit);
|
|
if (IS_ERR(wcnss->state)) {
|
|
ret = PTR_ERR(wcnss->state);
|
|
goto free_rproc;
|
|
}
|
|
}
|
|
|
|
qcom_add_smd_subdev(rproc, &wcnss->smd_subdev);
|
|
|
|
ret = rproc_add(rproc);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
|
|
|
|
free_rproc:
|
|
rproc_free(rproc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wcnss_remove(struct platform_device *pdev)
|
|
{
|
|
struct qcom_wcnss *wcnss = platform_get_drvdata(pdev);
|
|
|
|
of_platform_depopulate(&pdev->dev);
|
|
|
|
qcom_smem_state_put(wcnss->state);
|
|
rproc_del(wcnss->rproc);
|
|
|
|
qcom_remove_smd_subdev(wcnss->rproc, &wcnss->smd_subdev);
|
|
rproc_free(wcnss->rproc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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");
|