projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e7589271 FTS |
1 | /* |
| 2 | * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU General Public | |
| 6 | * License as published by the Free Software Foundation; | |
| 7 | * either version 2, or (at your option) any later version. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even | |
| 11 | * the implied warranty of MERCHANTABILITY or FITNESS FOR | |
| 12 | * A PARTICULAR PURPOSE.See the GNU General Public License | |
| 13 | * for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., | |
| 18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 19 | */ | |
| 20 | /* | |
| 21 | * infrastructure for devices connected via I2C | |
| 22 | */ | |
| 23 | ||
| 24 | #ifndef __VIA_AUX_H__ | |
| 25 | #define __VIA_AUX_H__ | |
| 26 | ||
| 27 | ||
| 28 | #include <linux/list.h> | |
| 29 | #include <linux/i2c.h> | |
| 5dc5f618 | 30 | #include <linux/fb.h> |
| e7589271 FTS |
31 | |
| 32 | ||
| 33 | struct via_aux_bus { | |
| 34 | struct i2c_adapter *adap; /* the I2C device to access the bus */ | |
| 35 | struct list_head drivers; /* drivers for devices on this bus */ | |
| 36 | }; | |
| 37 | ||
| 38 | struct via_aux_drv { | |
| 39 | struct list_head chain; /* chain to support multiple drivers */ | |
| 40 | ||
| 41 | struct via_aux_bus *bus; /* the I2C bus used */ | |
| 42 | u8 addr; /* the I2C slave address */ | |
| 43 | ||
| 44 | const char *name; /* human readable name of the driver */ | |
| 45 | void *data; /* private data of this driver */ | |
| 5dc5f618 FTS |
46 | |
| 47 | void (*cleanup)(struct via_aux_drv *drv); | |
| 48 | const struct fb_videomode* (*get_preferred_mode) | |
| 49 | (struct via_aux_drv *drv); | |
| e7589271 FTS |
50 | }; |
| 51 | ||
| 52 | ||
| 53 | struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap); | |
| 54 | void via_aux_free(struct via_aux_bus *bus); | |
| 5dc5f618 | 55 | const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus); |
| e7589271 FTS |
56 | |
| 57 | ||
| 58 | static inline bool via_aux_add(struct via_aux_drv *drv) | |
| 59 | { | |
| 60 | struct via_aux_drv *data = kmalloc(sizeof(*data), GFP_KERNEL); | |
| 61 | ||
| 62 | if (!data) | |
| 63 | return false; | |
| 64 | ||
| 65 | *data = *drv; | |
| 66 | list_add_tail(&data->chain, &data->bus->drivers); | |
| 67 | return true; | |
| 68 | } | |
| 69 | ||
| 70 | static inline bool via_aux_read(struct via_aux_drv *drv, u8 start, u8 *buf, | |
| 71 | u8 len) | |
| 72 | { | |
| 73 | struct i2c_msg msg[2] = { | |
| 74 | {.addr = drv->addr, .flags = 0, .len = 1, .buf = &start}, | |
| 75 | {.addr = drv->addr, .flags = I2C_M_RD, .len = len, .buf = buf} }; | |
| 76 | ||
| 77 | return i2c_transfer(drv->bus->adap, msg, 2) == 2; | |
| 78 | } | |
| 79 | ||
| 80 | ||
| 81 | /* probe functions of existing drivers - should only be called in via_aux.c */ | |
| 82 | void via_aux_ch7301_probe(struct via_aux_bus *bus); | |
| 83 | void via_aux_edid_probe(struct via_aux_bus *bus); | |
| 84 | void via_aux_sii164_probe(struct via_aux_bus *bus); | |
| 85 | void via_aux_vt1636_probe(struct via_aux_bus *bus); | |
| 86 | void via_aux_vt1632_probe(struct via_aux_bus *bus); | |
| 87 | void via_aux_vt1631_probe(struct via_aux_bus *bus); | |
| 88 | void via_aux_vt1625_probe(struct via_aux_bus *bus); | |
| 89 | void via_aux_vt1622_probe(struct via_aux_bus *bus); | |
| 90 | void via_aux_vt1621_probe(struct via_aux_bus *bus); | |
| 91 | ||
| 92 | ||
| 93 | #endif /* __VIA_AUX_H__ */ |