Release 4.12 include/linux/spmi.h
/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _LINUX_SPMI_H
#define _LINUX_SPMI_H
#include <linux/types.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
/* Maximum slave identifier */
#define SPMI_MAX_SLAVE_ID 16
/* SPMI Commands */
#define SPMI_CMD_EXT_WRITE 0x00
#define SPMI_CMD_RESET 0x10
#define SPMI_CMD_SLEEP 0x11
#define SPMI_CMD_SHUTDOWN 0x12
#define SPMI_CMD_WAKEUP 0x13
#define SPMI_CMD_AUTHENTICATE 0x14
#define SPMI_CMD_MSTR_READ 0x15
#define SPMI_CMD_MSTR_WRITE 0x16
#define SPMI_CMD_TRANSFER_BUS_OWNERSHIP 0x1A
#define SPMI_CMD_DDB_MASTER_READ 0x1B
#define SPMI_CMD_DDB_SLAVE_READ 0x1C
#define SPMI_CMD_EXT_READ 0x20
#define SPMI_CMD_EXT_WRITEL 0x30
#define SPMI_CMD_EXT_READL 0x38
#define SPMI_CMD_WRITE 0x40
#define SPMI_CMD_READ 0x60
#define SPMI_CMD_ZERO_WRITE 0x80
/**
* struct spmi_device - Basic representation of an SPMI device
* @dev: Driver model representation of the device.
* @ctrl: SPMI controller managing the bus hosting this device.
* @usid: This devices' Unique Slave IDentifier.
*/
struct spmi_device {
struct device dev;
struct spmi_controller *ctrl;
u8 usid;
};
static inline struct spmi_device *to_spmi_device(struct device *d)
{
return container_of(d, struct spmi_device, dev);
}
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static inline void *spmi_device_get_drvdata(const struct spmi_device *sdev)
{
return dev_get_drvdata(&sdev->dev);
}
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static inline void spmi_device_set_drvdata(struct spmi_device *sdev, void *data)
{
dev_set_drvdata(&sdev->dev, data);
}
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struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl);
static inline void spmi_device_put(struct spmi_device *sdev)
{
if (sdev)
put_device(&sdev->dev);
}
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int spmi_device_add(struct spmi_device *sdev);
void spmi_device_remove(struct spmi_device *sdev);
/**
* struct spmi_controller - interface to the SPMI master controller
* @dev: Driver model representation of the device.
* @nr: board-specific number identifier for this controller/bus
* @cmd: sends a non-data command sequence on the SPMI bus.
* @read_cmd: sends a register read command sequence on the SPMI bus.
* @write_cmd: sends a register write command sequence on the SPMI bus.
*/
struct spmi_controller {
struct device dev;
unsigned int nr;
int (*cmd)(struct spmi_controller *ctrl, u8 opcode, u8 sid);
int (*read_cmd)(struct spmi_controller *ctrl, u8 opcode,
u8 sid, u16 addr, u8 *buf, size_t len);
int (*write_cmd)(struct spmi_controller *ctrl, u8 opcode,
u8 sid, u16 addr, const u8 *buf, size_t len);
};
static inline struct spmi_controller *to_spmi_controller(struct device *d)
{
return container_of(d, struct spmi_controller, dev);
}
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static inline
void *spmi_controller_get_drvdata(const struct spmi_controller *ctrl)
{
return dev_get_drvdata(&ctrl->dev);
}
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static inline void spmi_controller_set_drvdata(struct spmi_controller *ctrl,
void *data)
{
dev_set_drvdata(&ctrl->dev, data);
}
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struct spmi_controller *spmi_controller_alloc(struct device *parent,
size_t size);
/**
* spmi_controller_put() - decrement controller refcount
* @ctrl SPMI controller.
*/
static inline void spmi_controller_put(struct spmi_controller *ctrl)
{
if (ctrl)
put_device(&ctrl->dev);
}
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int spmi_controller_add(struct spmi_controller *ctrl);
void spmi_controller_remove(struct spmi_controller *ctrl);
/**
* struct spmi_driver - SPMI slave device driver
* @driver: SPMI device drivers should initialize name and owner field of
* this structure.
* @probe: binds this driver to a SPMI device.
* @remove: unbinds this driver from the SPMI device.
*
* If PM runtime support is desired for a slave, a device driver can call
* pm_runtime_put() from their probe() routine (and a balancing
* pm_runtime_get() in remove()). PM runtime support for a slave is
* implemented by issuing a SLEEP command to the slave on runtime_suspend(),
* transitioning the slave into the SLEEP state. On runtime_resume(), a WAKEUP
* command is sent to the slave to bring it back to ACTIVE.
*/
struct spmi_driver {
struct device_driver driver;
int (*probe)(struct spmi_device *sdev);
void (*remove)(struct spmi_device *sdev);
};
static inline struct spmi_driver *to_spmi_driver(struct device_driver *d)
{
return container_of(d, struct spmi_driver, driver);
}
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#define spmi_driver_register(sdrv) \
__spmi_driver_register(sdrv, THIS_MODULE)
int __spmi_driver_register(struct spmi_driver *sdrv, struct module *owner);
/**
* spmi_driver_unregister() - unregister an SPMI client driver
* @sdrv: the driver to unregister
*/
static inline void spmi_driver_unregister(struct spmi_driver *sdrv)
{
if (sdrv)
driver_unregister(&sdrv->driver);
}
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#define module_spmi_driver(__spmi_driver) \
module_driver(__spmi_driver, spmi_driver_register, \
spmi_driver_unregister)
int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf);
int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,
size_t len);
int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf,
size_t len);
int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data);
int spmi_register_zero_write(struct spmi_device *sdev, u8 data);
int spmi_ext_register_write(struct spmi_device *sdev, u8 addr,
const u8 *buf, size_t len);
int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr,
const u8 *buf, size_t len);
int spmi_command_reset(struct spmi_device *sdev);
int spmi_command_sleep(struct spmi_device *sdev);
int spmi_command_wakeup(struct spmi_device *sdev);
int spmi_command_shutdown(struct spmi_device *sdev);
#endif
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