1 #ifndef __NVKM_I2C_H__ 2 #define __NVKM_I2C_H__ 3 #include <core/subdev.h> 4 #include <core/event.h> 5 6 #include <subdev/bios.h> 7 #include <subdev/bios/i2c.h> 8 9 struct nvkm_i2c_ntfy_req { 10 #define NVKM_I2C_PLUG 0x01 11 #define NVKM_I2C_UNPLUG 0x02 12 #define NVKM_I2C_IRQ 0x04 13 #define NVKM_I2C_DONE 0x08 14 #define NVKM_I2C_ANY 0x0f 15 u8 mask; 16 u8 port; 17 }; 18 19 struct nvkm_i2c_ntfy_rep { 20 u8 mask; 21 }; 22 23 struct nvkm_i2c_bus_probe { 24 struct i2c_board_info dev; 25 u8 udelay; /* set to 0 to use the standard delay */ 26 }; 27 28 struct nvkm_i2c_bus { 29 const struct nvkm_i2c_bus_func *func; 30 struct nvkm_i2c_pad *pad; 31 #define NVKM_I2C_BUS_CCB(n) /* 'n' is ccb index */ (n) 32 #define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 33 #define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1 34 #define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2 35 int id; 36 37 struct mutex mutex; 38 struct list_head head; 39 struct i2c_adapter i2c; 40 }; 41 42 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *); 43 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *); 44 int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *, 45 struct nvkm_i2c_bus_probe *, 46 bool (*)(struct nvkm_i2c_bus *, 47 struct i2c_board_info *, void *), void *); 48 49 struct nvkm_i2c_aux { 50 const struct nvkm_i2c_aux_func *func; 51 struct nvkm_i2c_pad *pad; 52 #define NVKM_I2C_AUX_CCB(n) /* 'n' is ccb index */ (n) 53 #define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100) 54 int id; 55 56 struct mutex mutex; 57 struct list_head head; 58 struct i2c_adapter i2c; 59 60 u32 intr; 61 }; 62 63 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor); 64 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *); 65 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *); 66 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type, 67 u32 addr, u8 *data, u8 size); 68 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw, 69 bool enhanced_framing); 70 71 struct nvkm_i2c { 72 const struct nvkm_i2c_func *func; 73 struct nvkm_subdev subdev; 74 75 struct list_head pad; 76 struct list_head bus; 77 struct list_head aux; 78 79 struct nvkm_event event; 80 }; 81 82 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int); 83 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int); 84 85 int nv04_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 86 int nv4e_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 87 int nv50_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 88 int g94_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 89 int gf117_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 90 int gf119_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 91 int gk104_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 92 int gm200_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **); 93 94 static inline int 95 nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 96 { 97 u8 val; 98 struct i2c_msg msgs[] = { 99 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 100 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val }, 101 }; 102 103 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 104 if (ret != 2) 105 return -EIO; 106 107 return val; 108 } 109 110 static inline int 111 nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg) 112 { 113 u8 val[2]; 114 struct i2c_msg msgs[] = { 115 { .addr = addr, .flags = 0, .len = 1, .buf = ® }, 116 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val }, 117 }; 118 119 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 120 if (ret != 2) 121 return -EIO; 122 123 return val[0] << 8 | val[1]; 124 } 125 126 static inline int 127 nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val) 128 { 129 u8 buf[2] = { reg, val }; 130 struct i2c_msg msgs[] = { 131 { .addr = addr, .flags = 0, .len = 2, .buf = buf }, 132 }; 133 134 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 135 if (ret != 1) 136 return -EIO; 137 138 return 0; 139 } 140 141 static inline int 142 nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val) 143 { 144 u8 buf[3] = { reg, val >> 8, val & 0xff}; 145 struct i2c_msg msgs[] = { 146 { .addr = addr, .flags = 0, .len = 3, .buf = buf }, 147 }; 148 149 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs)); 150 if (ret != 1) 151 return -EIO; 152 153 return 0; 154 } 155 156 static inline bool 157 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr) 158 { 159 return nvkm_rdi2cr(adap, addr, 0) >= 0; 160 } 161 162 static inline int 163 nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 164 { 165 int ret = nvkm_i2c_aux_acquire(aux); 166 if (ret == 0) { 167 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, size); 168 nvkm_i2c_aux_release(aux); 169 } 170 return ret; 171 } 172 173 static inline int 174 nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size) 175 { 176 int ret = nvkm_i2c_aux_acquire(aux); 177 if (ret == 0) { 178 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, size); 179 nvkm_i2c_aux_release(aux); 180 } 181 return ret; 182 } 183 #endif 184