e704eb5275
In certain scenarios, modem shutdown requests are handled in userspace. Enhance request engine of esoc driver to send shutdown requests to userspace. Also, during a shutdown, avoid setting status to 0, if line is not a power source. There can be multiple mdms monitoring status line. This can otherwise be misinterpreted as an unexpected reset by other mdms. Change-Id: I9c20a86e76f892cc61dbfb814202b26e5cce3e96 Signed-off-by: Arun KS <arunks@codeaurora.org> Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
182 lines
6 KiB
C
182 lines
6 KiB
C
/* Copyright (c) 2013-2015, 2017, 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 modify
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* it under the terms of the GNU General Public License version 2 and
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* only 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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#ifndef __ESOC_H__
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#define __ESOC_H__
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#include <linux/cdev.h>
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#include <linux/completion.h>
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#include <linux/esoc_ctrl.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <soc/qcom/subsystem_restart.h>
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#include <soc/qcom/subsystem_notif.h>
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#define ESOC_DEV_MAX 4
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#define ESOC_NAME_LEN 20
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#define ESOC_LINK_LEN 20
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struct esoc_clink;
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/**
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* struct esoc_eng: Engine of the esoc control link
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* @handle_clink_req: handle incoming esoc requests.
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* @handle_clink_evt: handle for esoc events.
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* @esoc_clink: pointer to esoc control link.
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*/
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struct esoc_eng {
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void (*handle_clink_req)(enum esoc_req req,
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struct esoc_eng *eng);
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void (*handle_clink_evt)(enum esoc_evt evt,
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struct esoc_eng *eng);
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struct esoc_clink *esoc_clink;
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};
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/**
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* struct esoc_clink: Representation of external esoc device
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* @name: Name of the external esoc.
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* @link_name: name of the physical link.
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* @link_info: additional info about the physical link.
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* @parent: parent device.
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* @dev: device for userspace interface.
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* @pdev: platform device to interface with SSR driver.
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* @id: id of the external device.
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* @owner: owner of the device.
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* @clink_ops: control operations for the control link
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* @req_eng: handle for request engine.
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* @cmd_eng: handle for command engine.
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* @clink_data: private data of esoc control link.
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* @compat_data: compat data of esoc driver.
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* @subsys_desc: descriptor for subsystem restart
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* @subsys_dev: ssr device handle.
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* @np: device tree node for esoc_clink.
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* @auto_boot: boots independently.
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* @primary: primary esoc controls(reset/poweroff) all secondary
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* esocs, but not otherway around.
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* @statusline_not_a_powersource: True if status line to esoc is not a
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* power source.
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* @userspace_handle_shutdown: True if user space handles shutdown requests.
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*/
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struct esoc_clink {
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const char *name;
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const char *link_name;
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const char *link_info;
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struct device *parent;
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struct device dev;
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struct platform_device *pdev;
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unsigned int id;
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struct module *owner;
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const struct esoc_clink_ops const *clink_ops;
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struct esoc_eng *req_eng;
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struct esoc_eng *cmd_eng;
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spinlock_t notify_lock;
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void *clink_data;
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void *compat_data;
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struct subsys_desc subsys;
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struct subsys_device *subsys_dev;
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struct device_node *np;
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bool auto_boot;
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bool primary;
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bool statusline_not_a_powersource;
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bool userspace_handle_shutdown;
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};
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/**
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* struct esoc_clink_ops: Operations to control external soc
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* @cmd_exe: Execute control command
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* @get_status: Get current status, or response to previous command
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* @get_err_fatal: Get status of err fatal signal
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* @notify_esoc: notify external soc of events
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*/
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struct esoc_clink_ops {
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int (*cmd_exe)(enum esoc_cmd cmd, struct esoc_clink *dev);
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void (*get_status)(u32 *status, struct esoc_clink *dev);
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void (*get_err_fatal)(u32 *status, struct esoc_clink *dev);
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void (*notify)(enum esoc_notify notify, struct esoc_clink *dev);
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};
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/**
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* struct esoc_compat: Compatibility of esoc drivers.
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* @name: esoc link that driver is compatible with.
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* @data: driver data associated with esoc clink.
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*/
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struct esoc_compat {
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const char *name;
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void *data;
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};
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/**
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* struct esoc_drv: Driver for an esoc clink
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* @driver: drivers for esoc.
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* @owner: module owner of esoc driver.
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* @compat_table: compatible table for driver.
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* @compat_entries
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* @probe: probe function for esoc driver.
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*/
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struct esoc_drv {
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struct device_driver driver;
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struct module *owner;
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struct esoc_compat *compat_table;
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unsigned int compat_entries;
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int (*probe)(struct esoc_clink *esoc_clink,
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struct esoc_drv *drv);
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};
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#define to_esoc_clink(d) container_of(d, struct esoc_clink, dev)
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#define to_esoc_drv(d) container_of(d, struct esoc_drv, driver)
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extern struct bus_type esoc_bus_type;
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/* Exported apis */
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void esoc_dev_exit(void);
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int esoc_dev_init(void);
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void esoc_clink_unregister(struct esoc_clink *esoc_dev);
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int esoc_clink_register(struct esoc_clink *esoc_dev);
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struct esoc_clink *get_esoc_clink(int id);
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struct esoc_clink *get_esoc_clink_by_node(struct device_node *node);
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void put_esoc_clink(struct esoc_clink *esoc_clink);
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void *get_esoc_clink_data(struct esoc_clink *esoc);
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void set_esoc_clink_data(struct esoc_clink *esoc, void *data);
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void esoc_clink_evt_notify(enum esoc_evt, struct esoc_clink *esoc_dev);
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void esoc_clink_queue_request(enum esoc_req req, struct esoc_clink *esoc_dev);
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void esoc_for_each_dev(void *data, int (*fn)(struct device *dev,
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void *data));
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int esoc_clink_register_cmd_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng);
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void esoc_clink_unregister_cmd_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng);
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int esoc_clink_register_req_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng);
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void esoc_clink_unregister_req_eng(struct esoc_clink *esoc_clink,
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struct esoc_eng *eng);
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int esoc_drv_register(struct esoc_drv *driver);
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void esoc_set_drv_data(struct esoc_clink *esoc_clink, void *data);
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void *esoc_get_drv_data(struct esoc_clink *esoc_clink);
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/* ssr operations */
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int esoc_clink_register_ssr(struct esoc_clink *esoc_clink);
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int esoc_clink_request_ssr(struct esoc_clink *esoc_clink);
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void esoc_clink_unregister_ssr(struct esoc_clink *esoc_clink);
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/* client notification */
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#ifdef CONFIG_ESOC_CLIENT
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void notify_esoc_clients(struct esoc_clink *esoc_clink, unsigned long evt);
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#else
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static inline void notify_esoc_clients(struct esoc_clink *esoc_clink,
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unsigned long evt)
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{
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return;
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}
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#endif
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bool esoc_req_eng_enabled(struct esoc_clink *esoc_clink);
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bool esoc_cmd_eng_enabled(struct esoc_clink *esoc_clink);
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#endif
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