diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h')
| -rw-r--r-- | drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h new file mode 100644 index 000000000000..a2e33730f05e --- /dev/null +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h @@ -0,0 +1,135 @@ +#ifndef __NVKM_I2C_H__ +#define __NVKM_I2C_H__ +#include <core/subdev.h> +#include <core/event.h> + +#include <subdev/bios.h> +#include <subdev/bios/i2c.h> + +#define NV_I2C_PORT(n) (0x00 + (n)) +#define NV_I2C_AUX(n) (0x10 + (n)) +#define NV_I2C_EXT(n) (0x20 + (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 nvkm_i2c_ntfy_req { +#define NVKM_I2C_PLUG 0x01 +#define NVKM_I2C_UNPLUG 0x02 +#define NVKM_I2C_IRQ 0x04 +#define NVKM_I2C_DONE 0x08 +#define NVKM_I2C_ANY 0x0f + u8 mask; + u8 port; +}; + +struct nvkm_i2c_ntfy_rep { + u8 mask; +}; + +struct nvkm_i2c_port { + struct nvkm_object base; + struct i2c_adapter adapter; + struct mutex mutex; + + struct list_head head; + u8 index; + int aux; + + const struct nvkm_i2c_func *func; +}; + +struct nvkm_i2c_func { + void (*drive_scl)(struct nvkm_i2c_port *, int); + void (*drive_sda)(struct nvkm_i2c_port *, int); + int (*sense_scl)(struct nvkm_i2c_port *); + int (*sense_sda)(struct nvkm_i2c_port *); + + int (*aux)(struct nvkm_i2c_port *, bool, u8, u32, u8 *, u8); + int (*pattern)(struct nvkm_i2c_port *, int pattern); + int (*lnk_ctl)(struct nvkm_i2c_port *, int nr, int bw, bool enh); + int (*drv_ctl)(struct nvkm_i2c_port *, int lane, int sw, int pe); +}; + +struct nvkm_i2c_board_info { + struct i2c_board_info dev; + u8 udelay; /* set to 0 to use the standard delay */ +}; + +struct nvkm_i2c { + struct nvkm_subdev base; + struct nvkm_event event; + + struct nvkm_i2c_port *(*find)(struct nvkm_i2c *, u8 index); + struct nvkm_i2c_port *(*find_type)(struct nvkm_i2c *, u16 type); + int (*acquire_pad)(struct nvkm_i2c_port *, unsigned long timeout); + void (*release_pad)(struct nvkm_i2c_port *); + int (*acquire)(struct nvkm_i2c_port *, unsigned long timeout); + void (*release)(struct nvkm_i2c_port *); + int (*identify)(struct nvkm_i2c *, int index, + const char *what, struct nvkm_i2c_board_info *, + bool (*match)(struct nvkm_i2c_port *, + struct i2c_board_info *, void *), + void *); + + wait_queue_head_t wait; + struct list_head ports; +}; + +static inline struct nvkm_i2c * +nvkm_i2c(void *obj) +{ + return (void *)nvkm_subdev(obj, NVDEV_SUBDEV_I2C); +} + +extern struct nvkm_oclass *nv04_i2c_oclass; +extern struct nvkm_oclass *nv4e_i2c_oclass; +extern struct nvkm_oclass *nv50_i2c_oclass; +extern struct nvkm_oclass *g94_i2c_oclass; +extern struct nvkm_oclass *gf110_i2c_oclass; +extern struct nvkm_oclass *gf117_i2c_oclass; +extern struct nvkm_oclass *gk104_i2c_oclass; +extern struct nvkm_oclass *gm204_i2c_oclass; + +static inline int +nv_rdi2cr(struct nvkm_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 nvkm_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 nvkm_i2c_port *port, u8 addr) +{ + return nv_rdi2cr(port, addr, 0) >= 0; +} + +int nv_rdaux(struct nvkm_i2c_port *, u32 addr, u8 *data, u8 size); +int nv_wraux(struct nvkm_i2c_port *, u32 addr, u8 *data, u8 size); +#endif |