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 }; 42 43 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *); 44 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *); 45 int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *, 46 struct nvkm_i2c_bus_probe *, 47 bool (*)(struct nvkm_i2c_bus *, 48 struct i2c_board_info *, void *), void *); 49 50 struct nvkm_i2c_aux { 51 const struct nvkm_i2c_aux_func *func; 52 struct nvkm_i2c_pad *pad; 53 #define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n) 54 #define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 55 int id; 56 57 struct mutex mutex; 58 struct list_head head; 59 struct i2c_adapter i2c; 60 61 u32 intr; 62 }; 63 64 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor); 65 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *); 66 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *); 67 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type, 68 u32 addr, u8 *data, u8 *size); 69 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw, 70 bool enhanced_framing); 71 72 struct nvkm_i2c { 73 const struct nvkm_i2c_func *func; 74 struct nvkm_subdev subdev; 75 76 struct list_head pad; 77 struct list_head bus; 78 struct list_head aux; 79 80 struct nvkm_event event; 81 }; 82 83 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int); 84 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int); 85 86 int nv04_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 87 int nv4e_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 88 int nv50_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 89 int g94_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 90 int gf117_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 91 int gf119_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 92 int gk104_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 93 int gm200_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 94 95 static inline int 96 nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 97 { 98 u8 val; 99 struct i2c_msg msgs[] = { 100 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 101 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, 102 }; 103 104 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 105 if (ret != 2) 106 return -EIO; 107 108 return val; 109 } 110 111 static inline int 112 nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 113 { 114 u8 val[2]; 115 struct i2c_msg msgs[] = { 116 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 117 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, 118 }; 119 120 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 121 if (ret != 2) 122 return -EIO; 123 124 return val[0] << 8 | val[1]; 125 } 126 127 static inline int 128 nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) 129 { 130 u8 buf[2] = { reg, val }; 131 struct i2c_msg msgs[] = { 132 { .addr = addr, .flags = 0, .len = 2, .buf = buf }, 133 }; 134 135 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 136 if (ret != 1) 137 return -EIO; 138 139 return 0; 140 } 141 142 static inline int 143 nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) 144 { 145 u8 buf[3] = { reg, val >> 8, val & 0xff}; 146 struct i2c_msg msgs[] = { 147 { .addr = addr, .flags = 0, .len = 3, .buf = buf }, 148 }; 149 150 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 151 if (ret != 1) 152 return -EIO; 153 154 return 0; 155 } 156 157 static inline bool 158 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) 159 { 160 return nvkm_rdi2cr(adap, addr, 0) >= 0; 161 } 162 163 static inline int 164 nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 165 { 166 const u8 xfer = size; 167 int ret = nvkm_i2c_aux_acquire(aux); 168 if (ret == 0) { 169 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size); 170 WARN_ON(!ret && size != xfer); 171 nvkm_i2c_aux_release(aux); 172 } 173 return ret; 174 } 175 176 static inline int 177 nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 178 { 179 int ret = nvkm_i2c_aux_acquire(aux); 180 if (ret == 0) { 181 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size); 182 nvkm_i2c_aux_release(aux); 183 } 184 return ret; 185 } 186 #endif 187