148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/*
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* Copyright (C) 2015 Samsung Electronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <soc/qcom/smsm.h>
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#define SUSPEND 0x1
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#define RESUME 0x0
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/**
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* struct smem_sec_hw_info_type - for SMEM_ID_VENDOR0
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* @afe_rx/tx_good : Request from CP system team
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* @afe_rx/tx_mute : Request from CP system team
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*/
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struct smem_afe_log_type {
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uint64_t afe_rx_good;
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uint64_t afe_rx_mute;
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uint64_t afe_tx_good;
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uint64_t afe_tx_mute;
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};
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struct sec_smem_id_vendor0_type {
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uint32_t ddr_vendor;
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uint32_t reserved;
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struct smem_afe_log_type afe_log;
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};
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/**
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* struct smem_sec_hw_info_type - for SMEM_ID_VENDOR1
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* @hw_rev: Samsung Board HW Revision
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* @ap_suspended: Indicate whether device goes to suspend mode
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*/
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struct sec_smem_hw_info_type {
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uint64_t hw_rev;
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uint64_t ap_suspended;
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};
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struct sec_smem_id_vendor1_type {
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struct sec_smem_hw_info_type hw_info;
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};
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static int sec_smem_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sec_smem_id_vendor1_type *vendor1 = platform_get_drvdata(pdev);
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vendor1->hw_info.ap_suspended = SUSPEND;
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pr_debug("%s : smem_sec_hw_info->ap_suspended(%d)\n",
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__func__, (uint32_t)vendor1->hw_info.ap_suspended);
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return 0;
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}
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static int sec_smem_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sec_smem_id_vendor1_type *vendor1 = platform_get_drvdata(pdev);
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vendor1->hw_info.ap_suspended = RESUME;
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pr_debug("%s : smem_sec_hw_info->ap_suspended(%d)\n",
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__func__, (uint32_t)vendor1->hw_info.ap_suspended);
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return 0;
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}
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static int sec_smem_probe(struct platform_device *pdev)
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{
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struct sec_smem_id_vendor1_type *sec_smem_hw_info;
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sec_smem_hw_info = smem_find(SMEM_ID_VENDOR1,
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sizeof(struct sec_smem_id_vendor1_type),
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0, SMEM_ANY_HOST_FLAG);
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if (!sec_smem_hw_info) {
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pr_err("%s size(%u): smem_sec_hw_info alloc error\n", __func__,
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(unsigned int)sizeof(struct sec_smem_id_vendor1_type));
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return -EINVAL;
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}
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platform_set_drvdata(pdev, sec_smem_hw_info);
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return 0;
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}
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#ifdef CONFIG_OF
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static struct of_device_id sec_smem_dt_ids[] = {
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{ .compatible = "samsung,sec-smem" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, sec_smem_dt_ids);
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#endif /* CONFIG_OF */
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static const struct dev_pm_ops sec_smem_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(sec_smem_suspend, sec_smem_resume)
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};
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struct platform_driver sec_smem_driver = {
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.probe = sec_smem_probe,
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.driver = {
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.name = "sec_smem",
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.owner = THIS_MODULE,
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.pm = &sec_smem_pm_ops,
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#ifdef CONFIG_OF
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.of_match_table = sec_smem_dt_ids,
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#endif
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},
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};
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static int __init sec_smem_init(void)
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{
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int err;
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err = platform_driver_register(&sec_smem_driver);
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if (err)
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pr_err("%s: Failed to register platform driver: %d \n", __func__, err);
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return 0;
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}
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static void __exit sec_smem_exit(void)
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{
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platform_driver_unregister(&sec_smem_driver);
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}
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device_initcall(sec_smem_init);
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module_exit(sec_smem_exit);
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MODULE_DESCRIPTION("SEC SMEM");
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MODULE_LICENSE("GPL v2");
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