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/*
* Greybus driver and device API
*
* Copyright 2014-2015 Google Inc.
* Copyright 2014-2015 Linaro Ltd.
*
* Released under the GPLv2 only.
*/
#ifndef __LINUX_GREYBUS_H
#define __LINUX_GREYBUS_H
#ifdef __KERNEL__
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/idr.h>
#include "kernel_ver.h"
#include "greybus_id.h"
#include "greybus_manifest.h"
#include "greybus_protocols.h"
#include "manifest.h"
#include "endo.h"
#include "svc.h"
#include "module.h"
#include "interface.h"
#include "bundle.h"
#include "connection.h"
#include "protocol.h"
#include "operation.h"
/* Matches up with the Greybus Protocol specification document */
#define GREYBUS_VERSION_MAJOR 0x00
#define GREYBUS_VERSION_MINOR 0x01
#define GREYBUS_DEVICE_ID_MATCH_DEVICE \
(GREYBUS_DEVICE_ID_MATCH_VENDOR | GREYBUS_DEVICE_ID_MATCH_PRODUCT)
#define GREYBUS_DEVICE(v, p) \
.match_flags = GREYBUS_DEVICE_ID_MATCH_DEVICE, \
.vendor = (v), \
.product = (p),
#define GREYBUS_DEVICE_SERIAL(s) \
.match_flags = GREYBUS_DEVICE_ID_MATCH_SERIAL, \
.serial_number = (s),
/* XXX I couldn't get my Kconfig file to be noticed for out-of-tree build */
#ifndef CONFIG_CPORT_ID_MAX
#define CONFIG_CPORT_ID_MAX 128
#endif /* !CONFIG_CPORT_ID_MAX */
/* Maximum number of CPorts usable by a host device */
/* XXX This should really be determined by the AP module manifest */
#define CPORT_ID_MAX CONFIG_CPORT_ID_MAX
#define CPORT_ID_BAD U16_MAX /* UniPro max id is 4095 */
/* For SP1 hardware, we are going to "hardcode" each device to have all logical
* blocks in order to be able to address them as one unified "unit". Then
* higher up layers will then be able to talk to them as one logical block and
* properly know how they are hooked together (i.e. which i2c port is on the
* same module as the gpio pins, etc.)
*
* So, put the "private" data structures here in greybus.h and link to them off
* of the "main" gb_module structure.
*/
struct greybus_host_device;
struct svc_msg;
/* Greybus "Host driver" structure, needed by a host controller driver to be
* able to handle both SVC control as well as "real" greybus messages
*/
struct greybus_host_driver {
size_t hd_priv_size;
void *(*message_send)(struct greybus_host_device *hd, u16 dest_cport_id,
struct gb_message *message, gfp_t gfp_mask);
void (*message_cancel)(void *cookie);
int (*submit_svc)(struct svc_msg *svc_msg,
struct greybus_host_device *hd);
};
struct greybus_host_device {
struct kref kref;
struct device *parent;
const struct greybus_host_driver *driver;
struct list_head interfaces;
struct list_head connections;
struct ida cport_id_map;
u8 device_id;
/* Host device buffer constraints */
size_t buffer_size_max;
struct gb_endo *endo;
/* Private data for the host driver */
unsigned long hd_priv[0] __aligned(sizeof(s64));
};
struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *hd,
struct device *parent,
size_t buffer_size_max);
int greybus_endo_setup(struct greybus_host_device *hd, u16 endo_id,
u8 ap_intf_id);
void greybus_remove_hd(struct greybus_host_device *hd);
struct greybus_driver {
const char *name;
int (*probe)(struct gb_bundle *bundle,
const struct greybus_bundle_id *id);
void (*disconnect)(struct gb_bundle *bundle);
int (*suspend)(struct gb_bundle *bundle, pm_message_t message);
int (*resume)(struct gb_bundle *bundle);
const struct greybus_bundle_id *id_table;
struct device_driver driver;
};
#define to_greybus_driver(d) container_of(d, struct greybus_driver, driver)
/* Don't call these directly, use the module_greybus_driver() macro instead */
int greybus_register_driver(struct greybus_driver *driver,
struct module *module, const char *mod_name);
void greybus_deregister_driver(struct greybus_driver *driver);
/* define to get proper THIS_MODULE and KBUILD_MODNAME values */
#define greybus_register(driver) \
greybus_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
#define greybus_deregister(driver) \
greybus_deregister_driver(driver)
/**
* module_greybus_driver() - Helper macro for registering a Greybus driver
* @__greybus_driver: greybus_driver structure
*
* Helper macro for Greybus drivers to set up proper module init / exit
* functions. Replaces module_init() and module_exit() and keeps people from
* printing pointless things to the kernel log when their driver is loaded.
*/
#define module_greybus_driver(__greybus_driver) \
module_driver(__greybus_driver, greybus_register, greybus_deregister)
int greybus_disabled(void);
int greybus_svc_in(struct greybus_host_device *hd, u8 *data, int length);
int gb_ap_init(void);
void gb_ap_exit(void);
void gb_debugfs_init(void);
void gb_debugfs_cleanup(void);
struct dentry *gb_debugfs_get(void);
extern struct bus_type greybus_bus_type;
int svc_set_route_send(struct gb_bundle *bundle,
struct greybus_host_device *hd);
extern struct device_type greybus_endo_type;
extern struct device_type greybus_module_type;
extern struct device_type greybus_interface_type;
extern struct device_type greybus_bundle_type;
extern struct device_type greybus_connection_type;
static inline int is_gb_endo(const struct device *dev)
{
return dev->type == &greybus_endo_type;
}
static inline int is_gb_module(const struct device *dev)
{
return dev->type == &greybus_module_type;
}
static inline int is_gb_interface(const struct device *dev)
{
return dev->type == &greybus_interface_type;
}
static inline int is_gb_bundle(const struct device *dev)
{
return dev->type == &greybus_bundle_type;
}
static inline int is_gb_connection(const struct device *dev)
{
return dev->type == &greybus_connection_type;
}
static inline bool cport_id_valid(u16 cport_id)
{
return cport_id && cport_id != CPORT_ID_BAD && cport_id <= CPORT_ID_MAX;
}
#endif /* __KERNEL__ */
#endif /* __LINUX_GREYBUS_H */
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