1 /* SPDX-License-Identifier: GPL-2.0 */ 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 10 struct 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 20 struct nvkm_i2c_ntfy_rep { 21 u8 mask; 22 }; 23 24 struct nvkm_i2c_bus_probe { 25 struct i2c_board_info dev; 26 u8 udelay; /* set to 0 to use the standard delay */ 27 }; 28 29 struct 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 44 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *); 45 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *); 46 int 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 51 struct 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 66 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor); 67 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *); 68 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *); 69 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type, 70 u32 addr, u8 *data, u8 *size); 71 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw, 72 bool enhanced_framing); 73 74 struct 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 85 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int); 86 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int); 87 88 int nv04_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 89 int nv4e_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 90 int nv50_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 91 int g94_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 92 int gf117_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 93 int gf119_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 94 int gk104_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 95 int gm200_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 96 97 static inline int 98 nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 99 { 100 u8 val; 101 struct i2c_msg msgs[] = { 102 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 103 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, 104 }; 105 106 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 107 if (ret != 2) 108 return -EIO; 109 110 return val; 111 } 112 113 static inline int 114 nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 115 { 116 u8 val[2]; 117 struct i2c_msg msgs[] = { 118 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 119 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, 120 }; 121 122 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 123 if (ret != 2) 124 return -EIO; 125 126 return val[0] << 8 | val[1]; 127 } 128 129 static inline int 130 nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) 131 { 132 u8 buf[2] = { reg, val }; 133 struct i2c_msg msgs[] = { 134 { .addr = addr, .flags = 0, .len = 2, .buf = buf }, 135 }; 136 137 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 138 if (ret != 1) 139 return -EIO; 140 141 return 0; 142 } 143 144 static inline int 145 nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) 146 { 147 u8 buf[3] = { reg, val >> 8, val & 0xff}; 148 struct i2c_msg msgs[] = { 149 { .addr = addr, .flags = 0, .len = 3, .buf = buf }, 150 }; 151 152 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 153 if (ret != 1) 154 return -EIO; 155 156 return 0; 157 } 158 159 static inline bool 160 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) 161 { 162 return nvkm_rdi2cr(adap, addr, 0) >= 0; 163 } 164 165 static inline int 166 nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 167 { 168 const u8 xfer = size; 169 int ret = nvkm_i2c_aux_acquire(aux); 170 if (ret == 0) { 171 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size); 172 WARN_ON(!ret && size != xfer); 173 nvkm_i2c_aux_release(aux); 174 } 175 return ret; 176 } 177 178 static inline int 179 nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 180 { 181 int ret = nvkm_i2c_aux_acquire(aux); 182 if (ret == 0) { 183 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size); 184 nvkm_i2c_aux_release(aux); 185 } 186 return ret; 187 } 188 #endif 189