diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_bios.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index 6dd00ffa63a0..8f1f16276f03 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.c +++ b/drivers/gpu/drm/nouveau/nouveau_bios.c @@ -2020,6 +2020,64 @@ init_sub_direct(struct nvbios *bios, uint16_t offset, struct init_exec *iexec) } static int +init_i2c_if(struct nvbios *bios, uint16_t offset, struct init_exec *iexec) +{ + /* + * INIT_I2C_IF opcode: 0x5E ('^') + * + * offset (8 bit): opcode + * offset + 1 (8 bit): DCB I2C table entry index + * offset + 2 (8 bit): I2C slave address + * offset + 3 (8 bit): I2C register + * offset + 4 (8 bit): mask + * offset + 5 (8 bit): data + * + * Read the register given by "I2C register" on the device addressed + * by "I2C slave address" on the I2C bus given by "DCB I2C table + * entry index". Compare the result AND "mask" to "data". + * If they're not equal, skip subsequent opcodes until condition is + * inverted (INIT_NOT), or we hit INIT_RESUME + */ + + uint8_t i2c_index = bios->data[offset + 1]; + uint8_t i2c_address = bios->data[offset + 2] >> 1; + uint8_t reg = bios->data[offset + 3]; + uint8_t mask = bios->data[offset + 4]; + uint8_t data = bios->data[offset + 5]; + struct nouveau_i2c_chan *chan; + union i2c_smbus_data val; + int ret; + + /* no execute check by design */ + + BIOSLOG(bios, "0x%04X: DCBI2CIndex: 0x%02X, I2CAddress: 0x%02X\n", + offset, i2c_index, i2c_address); + + chan = init_i2c_device_find(bios->dev, i2c_index); + if (!chan) + return -ENODEV; + + ret = i2c_smbus_xfer(&chan->adapter, i2c_address, 0, + I2C_SMBUS_READ, reg, + I2C_SMBUS_BYTE_DATA, &val); + if (ret < 0) { + BIOSLOG(bios, "0x%04X: I2CReg: 0x%02X, Value: [no device], " + "Mask: 0x%02X, Data: 0x%02X\n", + offset, reg, mask, data); + iexec->execute = 0; + return 6; + } + + BIOSLOG(bios, "0x%04X: I2CReg: 0x%02X, Value: 0x%02X, " + "Mask: 0x%02X, Data: 0x%02X\n", + offset, reg, val.byte, mask, data); + + iexec->execute = ((val.byte & mask) == data); + + return 6; +} + +static int init_copy_nv_reg(struct nvbios *bios, uint16_t offset, struct init_exec *iexec) { /* @@ -3517,6 +3575,69 @@ init_zm_auxch(struct nvbios *bios, uint16_t offset, struct init_exec *iexec) return len; } +static int +init_i2c_long_if(struct nvbios *bios, uint16_t offset, struct init_exec *iexec) +{ + /* + * INIT_I2C_LONG_IF opcode: 0x9A ('') + * + * offset (8 bit): opcode + * offset + 1 (8 bit): DCB I2C table entry index + * offset + 2 (8 bit): I2C slave address + * offset + 3 (16 bit): I2C register + * offset + 5 (8 bit): mask + * offset + 6 (8 bit): data + * + * Read the register given by "I2C register" on the device addressed + * by "I2C slave address" on the I2C bus given by "DCB I2C table + * entry index". Compare the result AND "mask" to "data". + * If they're not equal, skip subsequent opcodes until condition is + * inverted (INIT_NOT), or we hit INIT_RESUME + */ + + uint8_t i2c_index = bios->data[offset + 1]; + uint8_t i2c_address = bios->data[offset + 2] >> 1; + uint8_t reglo = bios->data[offset + 3]; + uint8_t reghi = bios->data[offset + 4]; + uint8_t mask = bios->data[offset + 5]; + uint8_t data = bios->data[offset + 6]; + struct nouveau_i2c_chan *chan; + uint8_t buf0[2] = { reghi, reglo }; + uint8_t buf1[1]; + struct i2c_msg msg[2] = { + { i2c_address, 0, 1, buf0 }, + { i2c_address, I2C_M_RD, 1, buf1 }, + }; + int ret; + + /* no execute check by design */ + + BIOSLOG(bios, "0x%04X: DCBI2CIndex: 0x%02X, I2CAddress: 0x%02X\n", + offset, i2c_index, i2c_address); + + chan = init_i2c_device_find(bios->dev, i2c_index); + if (!chan) + return -ENODEV; + + + ret = i2c_transfer(&chan->adapter, msg, 2); + if (ret < 0) { + BIOSLOG(bios, "0x%04X: I2CReg: 0x%02X:0x%02X, Value: [no device], " + "Mask: 0x%02X, Data: 0x%02X\n", + offset, reghi, reglo, mask, data); + iexec->execute = 0; + return 7; + } + + BIOSLOG(bios, "0x%04X: I2CReg: 0x%02X:0x%02X, Value: 0x%02X, " + "Mask: 0x%02X, Data: 0x%02X\n", + offset, reghi, reglo, buf1[0], mask, data); + + iexec->execute = ((buf1[0] & mask) == data); + + return 7; +} + static struct init_tbl_entry itbl_entry[] = { /* command name , id , length , offset , mult , command handler */ /* INIT_PROG (0x31, 15, 10, 4) removed due to no example of use */ @@ -3547,6 +3668,7 @@ static struct init_tbl_entry itbl_entry[] = { { "INIT_ZM_REG_SEQUENCE" , 0x58, init_zm_reg_sequence }, /* INIT_INDIRECT_REG (0x5A, 7, 0, 0) removed due to no example of use */ { "INIT_SUB_DIRECT" , 0x5B, init_sub_direct }, + { "INIT_I2C_IF" , 0x5E, init_i2c_if }, { "INIT_COPY_NV_REG" , 0x5F, init_copy_nv_reg }, { "INIT_ZM_INDEX_IO" , 0x62, init_zm_index_io }, { "INIT_COMPUTE_MEM" , 0x63, init_compute_mem }, @@ -3580,6 +3702,7 @@ static struct init_tbl_entry itbl_entry[] = { { "INIT_97" , 0x97, init_97 }, { "INIT_AUXCH" , 0x98, init_auxch }, { "INIT_ZM_AUXCH" , 0x99, init_zm_auxch }, + { "INIT_I2C_LONG_IF" , 0x9A, init_i2c_long_if }, { NULL , 0 , NULL } }; |