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1/* SPDX-License-Identifier: MIT */2#ifndef __NVKM_I2C_H__3#define __NVKM_I2C_H__4#include <core/subdev.h>5#include <core/event.h>6 7#include <subdev/bios.h>8#include <subdev/bios/i2c.h>9 10struct nvkm_i2c_bus_probe {11 struct i2c_board_info dev;12 u8 udelay; /* set to 0 to use the standard delay */13};14 15struct nvkm_i2c_bus {16 const struct nvkm_i2c_bus_func *func;17 struct nvkm_i2c_pad *pad;18#define NVKM_I2C_BUS_CCB(n) /* 'n' is ccb index */ (n)19#define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x10)20#define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -121#define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -222 int id;23 24 struct mutex mutex;25 struct list_head head;26 struct i2c_adapter i2c;27 u8 enabled;28};29 30int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);31void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);32int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *,33 struct nvkm_i2c_bus_probe *,34 bool (*)(struct nvkm_i2c_bus *,35 struct i2c_board_info *, void *), void *);36 37struct nvkm_i2c_aux {38 const struct nvkm_i2c_aux_func *func;39 struct nvkm_i2c_pad *pad;40#define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n)41#define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x10)42 int id;43 44 struct mutex mutex;45 struct list_head head;46 struct i2c_adapter i2c;47 u8 enabled;48 49 u32 intr;50};51 52void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);53int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);54void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);55int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,56 u32 addr, u8 *data, u8 *size);57int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,58 bool enhanced_framing);59 60struct nvkm_i2c {61 const struct nvkm_i2c_func *func;62 struct nvkm_subdev subdev;63 64 struct list_head pad;65 struct list_head bus;66 struct list_head aux;67 68#define NVKM_I2C_PLUG BIT(0)69#define NVKM_I2C_UNPLUG BIT(1)70#define NVKM_I2C_IRQ BIT(2)71#define NVKM_I2C_DONE BIT(3)72#define NVKM_I2C_ANY (NVKM_I2C_PLUG | NVKM_I2C_UNPLUG | NVKM_I2C_IRQ | NVKM_I2C_DONE)73 struct nvkm_event event;74};75 76struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);77struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);78 79int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);80int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);81int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);82int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);83int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);84int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);85int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);86int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);87int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);88 89static inline int90nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg)91{92 u8 val;93 struct i2c_msg msgs[] = {94 { .addr = addr, .flags = 0, .len = 1, .buf = ® },95 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },96 };97 98 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));99 if (ret != 2)100 return -EIO;101 102 return val;103}104 105static inline int106nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg)107{108 u8 val[2];109 struct i2c_msg msgs[] = {110 { .addr = addr, .flags = 0, .len = 1, .buf = ® },111 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val },112 };113 114 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));115 if (ret != 2)116 return -EIO;117 118 return val[0] << 8 | val[1];119}120 121static inline int122nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val)123{124 u8 buf[2] = { reg, val };125 struct i2c_msg msgs[] = {126 { .addr = addr, .flags = 0, .len = 2, .buf = buf },127 };128 129 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));130 if (ret != 1)131 return -EIO;132 133 return 0;134}135 136static inline int137nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val)138{139 u8 buf[3] = { reg, val >> 8, val & 0xff};140 struct i2c_msg msgs[] = {141 { .addr = addr, .flags = 0, .len = 3, .buf = buf },142 };143 144 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));145 if (ret != 1)146 return -EIO;147 148 return 0;149}150 151static inline bool152nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)153{154 return nvkm_rdi2cr(adap, addr, 0) >= 0;155}156 157static inline int158nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)159{160 const u8 xfer = size;161 int ret = nvkm_i2c_aux_acquire(aux);162 if (ret == 0) {163 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size);164 WARN_ON(!ret && size != xfer);165 nvkm_i2c_aux_release(aux);166 }167 return ret;168}169 170static inline int171nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)172{173 int ret = nvkm_i2c_aux_acquire(aux);174 if (ret == 0) {175 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size);176 nvkm_i2c_aux_release(aux);177 }178 return ret;179}180#endif181