i2c.h (5447B)
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_ntfy_req { 11#define NVKM_I2C_PLUG 0x01 12#define NVKM_I2C_UNPLUG 0x02 13#define NVKM_I2C_IRQ 0x04 14#define NVKM_I2C_DONE 0x08 15#define NVKM_I2C_ANY 0x0f 16 u8 mask; 17 u8 port; 18}; 19 20struct nvkm_i2c_ntfy_rep { 21 u8 mask; 22}; 23 24struct nvkm_i2c_bus_probe { 25 struct i2c_board_info dev; 26 u8 udelay; /* set to 0 to use the standard delay */ 27}; 28 29struct nvkm_i2c_bus { 30 const struct nvkm_i2c_bus_func *func; 31 struct nvkm_i2c_pad *pad; 32#define NVKM_I2C_BUS_CCB(n) /* 'n' is ccb index */ (n) 33#define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 34#define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1 35#define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2 36 int id; 37 38 struct mutex mutex; 39 struct list_head head; 40 struct i2c_adapter i2c; 41 u8 enabled; 42}; 43 44int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *); 45void nvkm_i2c_bus_release(struct nvkm_i2c_bus *); 46int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *, 47 struct nvkm_i2c_bus_probe *, 48 bool (*)(struct nvkm_i2c_bus *, 49 struct i2c_board_info *, void *), void *); 50 51struct nvkm_i2c_aux { 52 const struct nvkm_i2c_aux_func *func; 53 struct nvkm_i2c_pad *pad; 54#define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n) 55#define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 56 int id; 57 58 struct mutex mutex; 59 struct list_head head; 60 struct i2c_adapter i2c; 61 u8 enabled; 62 63 u32 intr; 64}; 65 66void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor); 67int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *); 68void nvkm_i2c_aux_release(struct nvkm_i2c_aux *); 69int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type, 70 u32 addr, u8 *data, u8 *size); 71int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw, 72 bool enhanced_framing); 73 74struct nvkm_i2c { 75 const struct nvkm_i2c_func *func; 76 struct nvkm_subdev subdev; 77 78 struct list_head pad; 79 struct list_head bus; 80 struct list_head aux; 81 82 struct nvkm_event event; 83}; 84 85struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int); 86struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int); 87 88int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 89int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 90int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 91int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 92int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 93int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 94int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 95int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 96int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **); 97 98static inline int 99nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 100{ 101 u8 val; 102 struct i2c_msg msgs[] = { 103 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 104 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, 105 }; 106 107 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 108 if (ret != 2) 109 return -EIO; 110 111 return val; 112} 113 114static inline int 115nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 116{ 117 u8 val[2]; 118 struct i2c_msg msgs[] = { 119 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 120 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, 121 }; 122 123 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 124 if (ret != 2) 125 return -EIO; 126 127 return val[0] << 8 | val[1]; 128} 129 130static inline int 131nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) 132{ 133 u8 buf[2] = { reg, val }; 134 struct i2c_msg msgs[] = { 135 { .addr = addr, .flags = 0, .len = 2, .buf = buf }, 136 }; 137 138 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 139 if (ret != 1) 140 return -EIO; 141 142 return 0; 143} 144 145static inline int 146nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) 147{ 148 u8 buf[3] = { reg, val >> 8, val & 0xff}; 149 struct i2c_msg msgs[] = { 150 { .addr = addr, .flags = 0, .len = 3, .buf = buf }, 151 }; 152 153 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 154 if (ret != 1) 155 return -EIO; 156 157 return 0; 158} 159 160static inline bool 161nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) 162{ 163 return nvkm_rdi2cr(adap, addr, 0) >= 0; 164} 165 166static inline int 167nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 168{ 169 const u8 xfer = size; 170 int ret = nvkm_i2c_aux_acquire(aux); 171 if (ret == 0) { 172 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size); 173 WARN_ON(!ret && size != xfer); 174 nvkm_i2c_aux_release(aux); 175 } 176 return ret; 177} 178 179static inline int 180nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 181{ 182 int ret = nvkm_i2c_aux_acquire(aux); 183 if (ret == 0) { 184 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size); 185 nvkm_i2c_aux_release(aux); 186 } 187 return ret; 188} 189#endif