3eac885de2
The firmware for the svc changes isn't quite ready, so revert the whole set of patches in one hunk to get things back to a working state for the other firmware developers. The svc patches will be added back in a separate branch. Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
205 lines
5.8 KiB
C
205 lines
5.8 KiB
C
/*
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* Greybus driver and device API
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*
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* Copyright 2014-2015 Google Inc.
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* Copyright 2014-2015 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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#ifndef __LINUX_GREYBUS_H
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#define __LINUX_GREYBUS_H
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#ifdef __KERNEL__
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/idr.h>
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#include "kernel_ver.h"
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#include "greybus_id.h"
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#include "greybus_manifest.h"
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#include "greybus_protocols.h"
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#include "manifest.h"
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#include "endo.h"
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#include "svc.h"
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#include "module.h"
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#include "control.h"
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#include "interface.h"
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#include "bundle.h"
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#include "connection.h"
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#include "protocol.h"
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#include "operation.h"
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/* Matches up with the Greybus Protocol specification document */
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#define GREYBUS_VERSION_MAJOR 0x00
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#define GREYBUS_VERSION_MINOR 0x01
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#define GREYBUS_DEVICE_ID_MATCH_DEVICE \
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(GREYBUS_DEVICE_ID_MATCH_VENDOR | GREYBUS_DEVICE_ID_MATCH_PRODUCT)
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#define GREYBUS_DEVICE(v, p) \
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.match_flags = GREYBUS_DEVICE_ID_MATCH_DEVICE, \
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.vendor = (v), \
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.product = (p),
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#define GREYBUS_DEVICE_SERIAL(s) \
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.match_flags = GREYBUS_DEVICE_ID_MATCH_SERIAL, \
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.serial_number = (s),
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/* XXX I couldn't get my Kconfig file to be noticed for out-of-tree build */
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#ifndef CONFIG_CPORT_ID_MAX
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#define CONFIG_CPORT_ID_MAX 128
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#endif /* !CONFIG_CPORT_ID_MAX */
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/* Maximum number of CPorts usable by a host device */
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/* XXX This should really be determined by the AP module manifest */
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#define CPORT_ID_MAX CONFIG_CPORT_ID_MAX
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#define CPORT_ID_BAD U16_MAX /* UniPro max id is 4095 */
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/* For SP1 hardware, we are going to "hardcode" each device to have all logical
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* blocks in order to be able to address them as one unified "unit". Then
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* higher up layers will then be able to talk to them as one logical block and
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* properly know how they are hooked together (i.e. which i2c port is on the
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* same module as the gpio pins, etc.)
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*
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* So, put the "private" data structures here in greybus.h and link to them off
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* of the "main" gb_module structure.
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*/
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struct greybus_host_device;
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struct svc_msg;
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/* Greybus "Host driver" structure, needed by a host controller driver to be
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* able to handle both SVC control as well as "real" greybus messages
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*/
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struct greybus_host_driver {
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size_t hd_priv_size;
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int (*message_send)(struct greybus_host_device *hd, u16 dest_cport_id,
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struct gb_message *message, gfp_t gfp_mask);
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void (*message_cancel)(struct gb_message *message);
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int (*submit_svc)(struct svc_msg *svc_msg,
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struct greybus_host_device *hd);
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};
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struct greybus_host_device {
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struct kref kref;
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struct device *parent;
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const struct greybus_host_driver *driver;
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struct list_head interfaces;
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struct list_head connections;
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struct ida cport_id_map;
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u8 device_id;
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/* Host device buffer constraints */
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size_t buffer_size_max;
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struct gb_endo *endo;
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struct gb_connection *initial_svc_connection;
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/* Private data for the host driver */
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unsigned long hd_priv[0] __aligned(sizeof(s64));
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};
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struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *hd,
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struct device *parent,
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size_t buffer_size_max);
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int greybus_endo_setup(struct greybus_host_device *hd, u16 endo_id,
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u8 ap_intf_id);
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void greybus_remove_hd(struct greybus_host_device *hd);
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struct greybus_driver {
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const char *name;
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int (*probe)(struct gb_bundle *bundle,
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const struct greybus_bundle_id *id);
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void (*disconnect)(struct gb_bundle *bundle);
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int (*suspend)(struct gb_bundle *bundle, pm_message_t message);
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int (*resume)(struct gb_bundle *bundle);
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const struct greybus_bundle_id *id_table;
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struct device_driver driver;
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};
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#define to_greybus_driver(d) container_of(d, struct greybus_driver, driver)
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/* Don't call these directly, use the module_greybus_driver() macro instead */
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int greybus_register_driver(struct greybus_driver *driver,
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struct module *module, const char *mod_name);
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void greybus_deregister_driver(struct greybus_driver *driver);
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/* define to get proper THIS_MODULE and KBUILD_MODNAME values */
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#define greybus_register(driver) \
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greybus_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
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#define greybus_deregister(driver) \
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greybus_deregister_driver(driver)
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/**
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* module_greybus_driver() - Helper macro for registering a Greybus driver
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* @__greybus_driver: greybus_driver structure
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*
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* Helper macro for Greybus drivers to set up proper module init / exit
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* functions. Replaces module_init() and module_exit() and keeps people from
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* printing pointless things to the kernel log when their driver is loaded.
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*/
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#define module_greybus_driver(__greybus_driver) \
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module_driver(__greybus_driver, greybus_register, greybus_deregister)
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int greybus_disabled(void);
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int greybus_svc_in(struct greybus_host_device *hd, u8 *data, int length);
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int gb_ap_init(void);
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void gb_ap_exit(void);
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void gb_debugfs_init(void);
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void gb_debugfs_cleanup(void);
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struct dentry *gb_debugfs_get(void);
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extern struct bus_type greybus_bus_type;
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extern struct device_type greybus_endo_type;
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extern struct device_type greybus_module_type;
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extern struct device_type greybus_interface_type;
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extern struct device_type greybus_bundle_type;
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extern struct device_type greybus_connection_type;
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static inline int is_gb_endo(const struct device *dev)
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{
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return dev->type == &greybus_endo_type;
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}
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static inline int is_gb_module(const struct device *dev)
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{
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return dev->type == &greybus_module_type;
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}
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static inline int is_gb_interface(const struct device *dev)
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{
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return dev->type == &greybus_interface_type;
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}
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static inline int is_gb_bundle(const struct device *dev)
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{
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return dev->type == &greybus_bundle_type;
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}
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static inline int is_gb_connection(const struct device *dev)
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{
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return dev->type == &greybus_connection_type;
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}
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static inline bool cport_id_valid(u16 cport_id)
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{
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return cport_id != CPORT_ID_BAD && cport_id <= CPORT_ID_MAX;
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}
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#endif /* __KERNEL__ */
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#endif /* __LINUX_GREYBUS_H */
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