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 | 180 |
1 files changed, 180 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 000000000..ef441dfde --- /dev/null +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h @@ -0,0 +1,180 @@ +/* SPDX-License-Identifier: MIT */ +#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> + +struct nvkm_i2c_bus_probe { + struct i2c_board_info dev; + u8 udelay; /* set to 0 to use the standard delay */ +}; + +struct nvkm_i2c_bus { + const struct nvkm_i2c_bus_func *func; + struct nvkm_i2c_pad *pad; +#define NVKM_I2C_BUS_CCB(n) /* 'n' is ccb index */ (n) +#define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x10) +#define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1 +#define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2 + int id; + + struct mutex mutex; + struct list_head head; + struct i2c_adapter i2c; + u8 enabled; +}; + +int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *); +void nvkm_i2c_bus_release(struct nvkm_i2c_bus *); +int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *, + struct nvkm_i2c_bus_probe *, + bool (*)(struct nvkm_i2c_bus *, + struct i2c_board_info *, void *), void *); + +struct nvkm_i2c_aux { + const struct nvkm_i2c_aux_func *func; + struct nvkm_i2c_pad *pad; +#define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n) +#define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x10) + int id; + + struct mutex mutex; + struct list_head head; + struct i2c_adapter i2c; + u8 enabled; + + u32 intr; +}; + +void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor); +int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *); +void nvkm_i2c_aux_release(struct nvkm_i2c_aux *); +int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type, + u32 addr, u8 *data, u8 *size); +int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw, + bool enhanced_framing); + +struct nvkm_i2c { + const struct nvkm_i2c_func *func; + struct nvkm_subdev subdev; + + struct list_head pad; + struct list_head bus; + struct list_head aux; + +#define NVKM_I2C_PLUG BIT(0) +#define NVKM_I2C_UNPLUG BIT(1) +#define NVKM_I2C_IRQ BIT(2) +#define NVKM_I2C_DONE BIT(3) +#define NVKM_I2C_ANY (NVKM_I2C_PLUG | NVKM_I2C_UNPLUG | NVKM_I2C_IRQ | NVKM_I2C_DONE) + struct nvkm_event event; +}; + +struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int); +struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int); + +int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); +int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); + +static inline int +nvkm_rdi2cr(struct i2c_adapter *adap, 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(adap, msgs, ARRAY_SIZE(msgs)); + if (ret != 2) + return -EIO; + + return val; +} + +static inline int +nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) +{ + u8 val[2]; + struct i2c_msg msgs[] = { + { .addr = addr, .flags = 0, .len = 1, .buf = ® }, + { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, + }; + + int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); + if (ret != 2) + return -EIO; + + return val[0] << 8 | val[1]; +} + +static inline int +nvkm_wri2cr(struct i2c_adapter *adap, 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(adap, msgs, ARRAY_SIZE(msgs)); + if (ret != 1) + return -EIO; + + return 0; +} + +static inline int +nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) +{ + u8 buf[3] = { reg, val >> 8, val & 0xff}; + struct i2c_msg msgs[] = { + { .addr = addr, .flags = 0, .len = 3, .buf = buf }, + }; + + int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); + if (ret != 1) + return -EIO; + + return 0; +} + +static inline bool +nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) +{ + return nvkm_rdi2cr(adap, addr, 0) >= 0; +} + +static inline int +nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) +{ + const u8 xfer = size; + int ret = nvkm_i2c_aux_acquire(aux); + if (ret == 0) { + ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size); + WARN_ON(!ret && size != xfer); + nvkm_i2c_aux_release(aux); + } + return ret; +} + +static inline int +nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) +{ + int ret = nvkm_i2c_aux_acquire(aux); + if (ret == 0) { + ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size); + nvkm_i2c_aux_release(aux); + } + return ret; +} +#endif |