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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2017, Linaro Ltd4 */5 6#include <linux/kernel.h>7#include <linux/module.h>8#include <linux/io.h>9#include <linux/slab.h>10#include <linux/of.h>11#include <linux/of_platform.h>12#include <linux/platform_device.h>13#include <linux/regmap.h>14#include <linux/mailbox_controller.h>15 16#define QCOM_APCS_IPC_BITS 3217 18struct qcom_apcs_ipc {19 struct mbox_controller mbox;20 struct mbox_chan mbox_chans[QCOM_APCS_IPC_BITS];21 22 struct regmap *regmap;23 unsigned long offset;24 struct platform_device *clk;25};26 27struct qcom_apcs_ipc_data {28 int offset;29 char *clk_name;30};31 32static const struct qcom_apcs_ipc_data ipq6018_apcs_data = {33 .offset = 8, .clk_name = "qcom,apss-ipq6018-clk"34};35 36static const struct qcom_apcs_ipc_data msm8916_apcs_data = {37 .offset = 8, .clk_name = "qcom-apcs-msm8916-clk"38};39 40static const struct qcom_apcs_ipc_data msm8994_apcs_data = {41 .offset = 8, .clk_name = NULL42};43 44static const struct qcom_apcs_ipc_data msm8996_apcs_data = {45 .offset = 16, .clk_name = "qcom-apcs-msm8996-clk"46};47 48static const struct qcom_apcs_ipc_data apps_shared_apcs_data = {49 .offset = 12, .clk_name = NULL50};51 52static const struct qcom_apcs_ipc_data sdx55_apcs_data = {53 .offset = 0x1008, .clk_name = "qcom-sdx55-acps-clk"54};55 56static const struct regmap_config apcs_regmap_config = {57 .reg_bits = 32,58 .reg_stride = 4,59 .val_bits = 32,60 .max_register = 0x1008,61 .fast_io = true,62};63 64static int qcom_apcs_ipc_send_data(struct mbox_chan *chan, void *data)65{66 struct qcom_apcs_ipc *apcs = container_of(chan->mbox,67 struct qcom_apcs_ipc, mbox);68 unsigned long idx = (unsigned long)chan->con_priv;69 70 return regmap_write(apcs->regmap, apcs->offset, BIT(idx));71}72 73static const struct mbox_chan_ops qcom_apcs_ipc_ops = {74 .send_data = qcom_apcs_ipc_send_data,75};76 77static int qcom_apcs_ipc_probe(struct platform_device *pdev)78{79 struct qcom_apcs_ipc *apcs;80 const struct qcom_apcs_ipc_data *apcs_data;81 struct regmap *regmap;82 void __iomem *base;83 unsigned long i;84 int ret;85 86 apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);87 if (!apcs)88 return -ENOMEM;89 90 base = devm_platform_ioremap_resource(pdev, 0);91 if (IS_ERR(base))92 return PTR_ERR(base);93 94 regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);95 if (IS_ERR(regmap))96 return PTR_ERR(regmap);97 98 apcs_data = of_device_get_match_data(&pdev->dev);99 100 apcs->regmap = regmap;101 apcs->offset = apcs_data->offset;102 103 /* Initialize channel identifiers */104 for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)105 apcs->mbox_chans[i].con_priv = (void *)i;106 107 apcs->mbox.dev = &pdev->dev;108 apcs->mbox.ops = &qcom_apcs_ipc_ops;109 apcs->mbox.chans = apcs->mbox_chans;110 apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);111 112 ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);113 if (ret) {114 dev_err(&pdev->dev, "failed to register APCS IPC controller\n");115 return ret;116 }117 118 if (apcs_data->clk_name) {119 apcs->clk = platform_device_register_data(&pdev->dev,120 apcs_data->clk_name,121 PLATFORM_DEVID_AUTO,122 NULL, 0);123 if (IS_ERR(apcs->clk))124 dev_err(&pdev->dev, "failed to register APCS clk\n");125 }126 127 platform_set_drvdata(pdev, apcs);128 129 return 0;130}131 132static void qcom_apcs_ipc_remove(struct platform_device *pdev)133{134 struct qcom_apcs_ipc *apcs = platform_get_drvdata(pdev);135 struct platform_device *clk = apcs->clk;136 137 platform_device_unregister(clk);138}139 140/* .data is the offset of the ipc register within the global block */141static const struct of_device_id qcom_apcs_ipc_of_match[] = {142 { .compatible = "qcom,ipq6018-apcs-apps-global", .data = &ipq6018_apcs_data },143 { .compatible = "qcom,msm8916-apcs-kpss-global", .data = &msm8916_apcs_data },144 { .compatible = "qcom,msm8939-apcs-kpss-global", .data = &msm8916_apcs_data },145 { .compatible = "qcom,msm8953-apcs-kpss-global", .data = &msm8994_apcs_data },146 { .compatible = "qcom,msm8994-apcs-kpss-global", .data = &msm8994_apcs_data },147 { .compatible = "qcom,msm8996-apcs-hmss-global", .data = &msm8996_apcs_data },148 { .compatible = "qcom,qcm2290-apcs-hmss-global", .data = &msm8994_apcs_data },149 { .compatible = "qcom,sdm845-apss-shared", .data = &apps_shared_apcs_data },150 { .compatible = "qcom,sdx55-apcs-gcc", .data = &sdx55_apcs_data },151 /* Do not add any more entries using existing driver data */152 { .compatible = "qcom,msm8976-apcs-kpss-global", .data = &msm8994_apcs_data },153 { .compatible = "qcom,msm8998-apcs-hmss-global", .data = &msm8994_apcs_data },154 { .compatible = "qcom,qcs404-apcs-apps-global", .data = &msm8916_apcs_data },155 { .compatible = "qcom,sdm660-apcs-hmss-global", .data = &msm8994_apcs_data },156 { .compatible = "qcom,sm4250-apcs-hmss-global", .data = &msm8994_apcs_data },157 { .compatible = "qcom,sm6125-apcs-hmss-global", .data = &msm8994_apcs_data },158 { .compatible = "qcom,sm6115-apcs-hmss-global", .data = &msm8994_apcs_data },159 { .compatible = "qcom,ipq5332-apcs-apps-global", .data = &ipq6018_apcs_data },160 { .compatible = "qcom,ipq8074-apcs-apps-global", .data = &ipq6018_apcs_data },161 { .compatible = "qcom,sc7180-apss-shared", .data = &apps_shared_apcs_data },162 { .compatible = "qcom,sc8180x-apss-shared", .data = &apps_shared_apcs_data },163 { .compatible = "qcom,sm8150-apss-shared", .data = &apps_shared_apcs_data },164 {}165};166MODULE_DEVICE_TABLE(of, qcom_apcs_ipc_of_match);167 168static struct platform_driver qcom_apcs_ipc_driver = {169 .probe = qcom_apcs_ipc_probe,170 .remove_new = qcom_apcs_ipc_remove,171 .driver = {172 .name = "qcom_apcs_ipc",173 .of_match_table = qcom_apcs_ipc_of_match,174 },175};176 177static int __init qcom_apcs_ipc_init(void)178{179 return platform_driver_register(&qcom_apcs_ipc_driver);180}181postcore_initcall(qcom_apcs_ipc_init);182 183static void __exit qcom_apcs_ipc_exit(void)184{185 platform_driver_unregister(&qcom_apcs_ipc_driver);186}187module_exit(qcom_apcs_ipc_exit);188 189MODULE_LICENSE("GPL v2");190MODULE_DESCRIPTION("Qualcomm APCS IPC driver");191