1 #ifndef __LUNAIX_DEVICE_H
2 #define __LUNAIX_DEVICE_H
4 #define DEVICE_NAME_SIZE 32
6 #include <lunaix/device_num.h>
7 #include <lunaix/ds/hashtable.h>
8 #include <lunaix/ds/hstr.h>
9 #include <lunaix/ds/ldga.h>
10 #include <lunaix/ds/llist.h>
11 #include <lunaix/ds/mutex.h>
12 #include <lunaix/iopoll.h>
13 #include <lunaix/types.h>
15 #include <usr/lunaix/device.h>
18 * @brief Export a device definition (i.e., device driver metadata)
21 #define EXPORT_DEVICE(id, devdef, load_order) \
22 export_ldga_el(devdefs, id, ptr_t, devdef); \
23 export_ldga_el_sfx(devdefs, id##_ldorder, ptr_t, devdef, load_order);
26 * @brief Mark the device definition can be loaded on demand, all other loading
27 * options are extended from this
29 #define load_on_demand ld_ondemand
32 * @brief Mark the device definition to be loaded as system configuration
33 * device. These kind of devices are defined to be the devices that talk to the
34 * system firmware to do config, or collecting crucial information about the
35 * system. For instances, ACPI, SoC components, and other **interconnection**
36 * buese (not USB!). Such device driver must only rely on basic memory
37 * management service, and must not try accessing subsystems other than the mm
38 * unit, for example, timer, interrupt, file-system, must not assumed exist.
41 #define load_sysconf ld_sysconf
44 * @brief Mark the device definition should be loaded as time device, for
45 * example a real time clock device. Such device will be loaded and managed by
48 #define load_timedev ld_timedev
51 * @brief Mark the device definition should be loaded automatically during the
52 * bootstrapping stage. Most of the driver do load there.
55 #define load_onboot ld_kboot
58 * @brief Mark the device definition should be loaded automatically in
59 * the post boostrapping stage (i.e., the start up of proc0), where most of
60 * kernel sub-system are became ready to use. Do your load there if your driver
61 * depends on such condition
64 #define load_postboot ld_post
66 #define __foreach_exported_device_of(stage, index, pos) \
67 ldga_foreach(dev_##stage, struct device_def*, index, pos)
68 #define foreach_exported_device_of(stage, index, pos) \
69 __foreach_exported_device_of(stage, index, pos)
72 * @brief Declare a device class
75 #define DEVCLASS(devif, devfn, dev) \
78 .fn_grp = DEV_FNGRP(devif, devfn), .device = (dev), .variant = 0 \
81 #define DEVCLASSV(devif, devfn, dev, devvar) \
84 .fn_grp = DEV_FNGRP(devif, devfn), .device = (dev), \
88 #define DEV_STRUCT_MAGIC 0x5645444c
90 #define DEV_MSKIF 0x00000003
92 #define DEV_IFVOL 0x0 // volumetric (block) device
93 #define DEV_IFSEQ 0x1 // sequential (character) device
94 #define DEV_IFCAT 0x2 // a device category (as device groupping)
95 #define DEV_IFSYS 0x3 // a system device
99 /* -- device structing -- */
102 struct llist_header siblings;
103 struct llist_header children;
104 struct device* parent;
106 /* -- device state -- */
111 struct devident ident;
115 char name_val[DEVICE_NAME_SIZE];
124 // TODO Think about where will they fit.
125 int (*acquire)(struct device* dev);
126 int (*release)(struct device* dev);
128 int (*read)(struct device* dev, void* buf, size_t offset, size_t len);
129 int (*write)(struct device* dev, void* buf, size_t offset, size_t len);
130 int (*read_page)(struct device* dev, void* buf, size_t offset);
131 int (*write_page)(struct device* dev, void* buf, size_t offset);
132 int (*exec_cmd)(struct device* dev, u32_t req, va_list args);
133 int (*poll)(struct device* dev);
139 struct llist_header dev_list;
140 struct hlist_node hlist;
141 struct hlist_node hlist_if;
144 struct devclass class;
147 * @brief Called when the driver is required to initialize itself.
150 int (*init)(struct device_def*);
153 * @brief Called when the driver is required to bind with a device. This is
154 * the case for a real-hardware-oriented driver
157 int (*bind)(struct device_def*, struct device*);
160 * @brief Called when a driver is requested to detach from the device and
161 * free up all it's resources
164 int (*free)(struct device_def*, void* instance);
168 device_id_from_class(struct devclass* class)
170 return ((class->device & 0xffff) << 16) | ((class->variant & 0xffff));
174 device_scan_drivers();
177 device_setname_vargs(struct device* dev, char* fmt, va_list args);
180 device_setname(struct device* dev, char* fmt, ...);
183 device_register(struct device* dev, struct devclass* class, char* fmt, ...);
186 device_create(struct device* dev,
187 struct device* parent,
192 device_alloc(struct device* parent, u32_t type, void* underlay);
194 static inline struct device*
195 device_allocsys(struct device* parent, void* underlay)
197 return device_alloc(parent, DEV_IFSYS, underlay);
200 static inline struct device*
201 device_allocseq(struct device* parent, void* underlay)
203 return device_alloc(parent, DEV_IFSEQ, underlay);
206 static inline struct device*
207 device_allocvol(struct device* parent, void* underlay)
209 return device_alloc(parent, DEV_IFVOL, underlay);
213 device_addcat(struct device* parent, char* name_fmt, ...);
216 device_remove(struct device* dev);
219 device_getbyid(struct llist_header* devlist, u32_t id);
222 device_getbyhname(struct device* root_dev, struct hstr* name);
225 device_getbyname(struct device* root_dev, const char* name, size_t len);
228 device_getbyoffset(struct device* root_dev, int pos);
231 device_cast(void* obj);
234 device_definitions_byif(int if_type);
237 devdef_byident(struct devident* class);
240 device_populate_info(struct device* dev, struct dev_info* devinfo);
243 device_scan_drivers();
245 /*------ Load hooks ------*/
248 device_onbooot_load();
251 device_postboot_load();
254 device_sysconf_load();
257 device_lock(struct device* dev)
259 mutex_lock(&dev->lock);
263 device_unlock(struct device* dev)
265 mutex_unlock(&dev->lock);
269 device_locked(struct device* dev)
271 return mutex_on_hold(&dev->lock);
274 #define devprintf_expand(devident) (devident)->fn_grp, (devident)->unique
276 #endif /* __LUNAIX_DEVICE_H */