| #ifndef __NOUVEAU_I2C_H__ |
| #define __NOUVEAU_I2C_H__ |
| |
| #include <core/subdev.h> |
| #include <core/device.h> |
| |
| #include <subdev/bios.h> |
| #include <subdev/bios/i2c.h> |
| |
| #define NV_I2C_PORT(n) (0x00 + (n)) |
| #define NV_I2C_DEFAULT(n) (0x80 + (n)) |
| |
| #define NV_I2C_TYPE_DCBI2C(n) (0x0000 | (n)) |
| #define NV_I2C_TYPE_EXTDDC(e) (0x0005 | (e) << 8) |
| #define NV_I2C_TYPE_EXTAUX(e) (0x0006 | (e) << 8) |
| |
| struct nouveau_i2c_port { |
| struct nouveau_object base; |
| struct i2c_adapter adapter; |
| |
| struct list_head head; |
| u8 index; |
| |
| const struct nouveau_i2c_func *func; |
| }; |
| |
| struct nouveau_i2c_func { |
| void (*acquire)(struct nouveau_i2c_port *); |
| void (*release)(struct nouveau_i2c_port *); |
| |
| void (*drive_scl)(struct nouveau_i2c_port *, int); |
| void (*drive_sda)(struct nouveau_i2c_port *, int); |
| int (*sense_scl)(struct nouveau_i2c_port *); |
| int (*sense_sda)(struct nouveau_i2c_port *); |
| |
| int (*aux)(struct nouveau_i2c_port *, bool, u8, u32, u8 *, u8); |
| int (*pattern)(struct nouveau_i2c_port *, int pattern); |
| int (*lnk_ctl)(struct nouveau_i2c_port *, int nr, int bw, bool enh); |
| int (*drv_ctl)(struct nouveau_i2c_port *, int lane, int sw, int pe); |
| }; |
| |
| struct nouveau_i2c_board_info { |
| struct i2c_board_info dev; |
| u8 udelay; /* set to 0 to use the standard delay */ |
| }; |
| |
| struct nouveau_i2c { |
| struct nouveau_subdev base; |
| |
| struct nouveau_i2c_port *(*find)(struct nouveau_i2c *, u8 index); |
| struct nouveau_i2c_port *(*find_type)(struct nouveau_i2c *, u16 type); |
| int (*identify)(struct nouveau_i2c *, int index, |
| const char *what, struct nouveau_i2c_board_info *, |
| bool (*match)(struct nouveau_i2c_port *, |
| struct i2c_board_info *, void *), void *); |
| struct list_head ports; |
| }; |
| |
| static inline struct nouveau_i2c * |
| nouveau_i2c(void *obj) |
| { |
| return (void *)nv_device(obj)->subdev[NVDEV_SUBDEV_I2C]; |
| } |
| |
| extern struct nouveau_oclass *nv04_i2c_oclass; |
| extern struct nouveau_oclass *nv4e_i2c_oclass; |
| extern struct nouveau_oclass *nv50_i2c_oclass; |
| extern struct nouveau_oclass *nv94_i2c_oclass; |
| extern struct nouveau_oclass *nvd0_i2c_oclass; |
| |
| static inline int |
| nv_rdi2cr(struct nouveau_i2c_port *port, u8 addr, u8 reg) |
| { |
| u8 val; |
| struct i2c_msg msgs[] = { |
| { .addr = addr, .flags = 0, .len = 1, .buf = ® }, |
| { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, |
| }; |
| |
| int ret = i2c_transfer(&port->adapter, msgs, 2); |
| if (ret != 2) |
| return -EIO; |
| |
| return val; |
| } |
| |
| static inline int |
| nv_wri2cr(struct nouveau_i2c_port *port, u8 addr, u8 reg, u8 val) |
| { |
| u8 buf[2] = { reg, val }; |
| struct i2c_msg msgs[] = { |
| { .addr = addr, .flags = 0, .len = 2, .buf = buf }, |
| }; |
| |
| int ret = i2c_transfer(&port->adapter, msgs, 1); |
| if (ret != 1) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| static inline bool |
| nv_probe_i2c(struct nouveau_i2c_port *port, u8 addr) |
| { |
| return nv_rdi2cr(port, addr, 0) >= 0; |
| } |
| |
| int nv_rdaux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size); |
| int nv_wraux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size); |
| |
| #endif |