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/types.h>
14 #include <usr/lunaix/device.h>
17 * @brief Export a device definition (i.e., device driver metadata)
20 #define EXPORT_DEVICE(id, devdef, load_order) \
21 export_ldga_el(devdefs, id, ptr_t, devdef); \
22 export_ldga_el_sfx(devdefs, id##_ldorder, ptr_t, devdef, load_order);
25 * @brief Mark the device definition can be loaded on demand, all other loading
26 * options are extended from this
28 #define load_on_demand ld_ondemand
31 * @brief Mark the device definition to be loaded as system configuration
32 * device. These kind of devices are defined to be the devices that talk to the
33 * system firmware to do config, or collecting crucial information about the
34 * system. For instances, ACPI, SoC components, and other **interconnection**
35 * buese (not USB!). Such device driver must only rely on basic memory
36 * management service, and must not try accessing subsystems other than the mm
37 * unit, for example, timer, interrupt, file-system, must not assumed exist.
40 #define load_sysconf ld_sysconf
43 * @brief Mark the device definition should be loaded as time device, for
44 * example a real time clock device. Such device will be loaded and managed by
47 #define load_timedev ld_timedev
50 * @brief Mark the device definition should be loaded automatically during the
51 * bootstrapping stage. Most of the driver do load there.
54 #define load_onboot ld_kboot
57 * @brief Mark the device definition should be loaded automatically in
58 * the post boostrapping stage (i.e., the start up of proc0), where most of
59 * kernel sub-system are became ready to use. Do your load there if your driver
60 * depends on such condition
63 #define load_postboot ld_post
65 #define __foreach_exported_device_of(stage, index, pos) \
66 ldga_foreach(dev_##stage, struct device_def*, index, pos)
67 #define foreach_exported_device_of(stage, index, pos) \
68 __foreach_exported_device_of(stage, index, pos)
71 * @brief Declare a device class
74 #define DEVCLASS(devif, devfn, dev) \
77 .fn_grp = DEV_FNGRP(devif, devfn), .device = (dev), .variant = 0 \
80 #define DEVCLASSV(devif, devfn, dev, devvar) \
83 .fn_grp = DEV_FNGRP(devif, devfn), .device = (dev), \
87 #define DEV_STRUCT_MAGIC 0x5645444c
89 #define DEV_MSKIF 0x00000003
91 #define DEV_IFVOL 0x0 // volumetric (block) device
92 #define DEV_IFSEQ 0x1 // sequential (character) device
93 #define DEV_IFCAT 0x2 // a device category (as device groupping)
94 #define DEV_IFSYS 0x3 // a system device
99 struct llist_header siblings;
100 struct llist_header children;
101 struct device* parent;
104 // TODO investigate event polling
107 struct devident ident;
111 char name_val[DEVICE_NAME_SIZE];
116 // TODO Think about where will they fit.
117 int (*acquire)(struct device* dev);
118 int (*release)(struct device* dev);
120 int (*read)(struct device* dev, void* buf, size_t offset, size_t len);
121 int (*write)(struct device* dev, void* buf, size_t offset, size_t len);
122 int (*read_page)(struct device* dev, void* buf, size_t offset);
123 int (*write_page)(struct device* dev, void* buf, size_t offset);
124 int (*exec_cmd)(struct device* dev, u32_t req, va_list args);
130 struct llist_header dev_list;
131 struct hlist_node hlist;
132 struct hlist_node hlist_if;
135 struct devclass class;
138 * @brief Called when the driver is required to initialize itself.
141 int (*init)(struct device_def*);
144 * @brief Called when the driver is required to bind with a device. This is
145 * the case for a real-hardware-oriented driver
148 int (*bind)(struct device_def*, struct device*);
151 * @brief Called when a driver is requested to detach from the device and
152 * free up all it's resources
155 int (*free)(struct device_def*, void* instance);
159 device_id_from_class(struct devclass* class)
161 return ((class->device & 0xffff) << 16) | ((class->variant & 0xffff));
165 device_scan_drivers();
168 device_setname_vargs(struct device* dev, char* fmt, va_list args);
171 device_setname(struct device* dev, char* fmt, ...);
174 device_register(struct device* dev, struct devclass* class, char* fmt, ...);
177 device_create(struct device* dev,
178 struct device* parent,
183 device_alloc(struct device* parent, u32_t type, void* underlay);
185 static inline struct device*
186 device_allocsys(struct device* parent, void* underlay)
188 return device_alloc(parent, DEV_IFSYS, underlay);
191 static inline struct device*
192 device_allocseq(struct device* parent, void* underlay)
194 return device_alloc(parent, DEV_IFSEQ, underlay);
197 static inline struct device*
198 device_allocvol(struct device* parent, void* underlay)
200 return device_alloc(parent, DEV_IFVOL, underlay);
204 device_addcat(struct device* parent, char* name_fmt, ...);
207 device_remove(struct device* dev);
210 device_getbyid(struct llist_header* devlist, u32_t id);
213 device_getbyhname(struct device* root_dev, struct hstr* name);
216 device_getbyname(struct device* root_dev, const char* name, size_t len);
219 device_getbyoffset(struct device* root_dev, int pos);
222 device_cast(void* obj);
225 device_definitions_byif(int if_type);
228 devdef_byident(struct devident* class);
231 device_populate_info(struct device* dev, struct dev_info* devinfo);
234 device_scan_drivers();
236 /*------ Load hooks ------*/
239 device_onbooot_load();
242 device_postboot_load();
245 device_sysconf_load();
248 device_lock(struct device* dev)
250 mutex_lock(&dev->lock);
254 device_unlock(struct device* dev)
256 mutex_unlock(&dev->lock);
260 device_locked(struct device* dev)
262 return mutex_on_hold(&dev->lock);
265 #define devprintf_expand(devident) (devident)->fn_grp, (devident)->unique
267 #endif /* __LUNAIX_DEVICE_H */