dev/ixl/ixl_pf_i2c.c

51 static s32	ixl_set_i2c_data(struct ixl_pf *pf, u32 *i2cctl, bool data);
52 static bool	ixl_get_i2c_data(struct ixl_pf *pf, u32 *i2cctl);
53 static void	ixl_raise_i2c_clk(struct ixl_pf *pf, u32 *i2cctl);
54 static void	ixl_lower_i2c_clk(struct ixl_pf *pf, u32 *i2cctl);
55 static s32	ixl_clock_out_i2c_bit(struct ixl_pf *pf, bool data);
56 static s32	ixl_get_i2c_ack(struct ixl_pf *pf);
57 static s32	ixl_clock_out_i2c_byte(struct ixl_pf *pf, u8 data);
58 static s32	ixl_clock_in_i2c_bit(struct ixl_pf *pf, bool *data);
59 static s32	ixl_clock_in_i2c_byte(struct ixl_pf *pf, u8 *data);
60 static void 	ixl_i2c_bus_clear(struct ixl_pf *pf);
61 static void	ixl_i2c_start(struct ixl_pf *pf);
62 static void	ixl_i2c_stop(struct ixl_pf *pf);
74 ixl_i2c_bus_clear(struct ixl_pf *pf)
76 	struct i40e_hw *hw = &pf->hw;
82 	ixl_i2c_start(pf);
84 	ixl_set_i2c_data(pf, &i2cctl, 1);
87 		ixl_raise_i2c_clk(pf, &i2cctl);
92 		ixl_lower_i2c_clk(pf, &i2cctl);
98 	ixl_i2c_start(pf);
101 	ixl_i2c_stop(pf);
111 ixl_i2c_stop(struct ixl_pf *pf)
113 	struct i40e_hw *hw = &pf->hw;
119 	ixl_set_i2c_data(pf, &i2cctl, 0);
120 	ixl_raise_i2c_clk(pf, &i2cctl);
125 	ixl_set_i2c_data(pf, &i2cctl, 1);
139 ixl_clock_in_i2c_byte(struct ixl_pf *pf, u8 *data)
147 		ixl_clock_in_i2c_bit(pf, &bit);
162 ixl_clock_in_i2c_bit(struct ixl_pf *pf, bool *data)
164 	struct i40e_hw *hw = &pf->hw;
169 	ixl_raise_i2c_clk(pf, &i2cctl);
180 	*data = ixl_get_i2c_data(pf, &i2cctl);
182 	ixl_lower_i2c_clk(pf, &i2cctl);
197 ixl_get_i2c_ack(struct ixl_pf *pf)
199 	struct i40e_hw *hw = &pf->hw;
206 	ixl_raise_i2c_clk(pf, &i2cctl);
220 		ack = ixl_get_i2c_data(pf, &i2cctl);
228 		ixl_dbg(pf, IXL_DBG_I2C, "I2C ack was not received.\n");
232 	ixl_lower_i2c_clk(pf, &i2cctl);
248 ixl_clock_out_i2c_bit(struct ixl_pf *pf, bool data)
250 	struct i40e_hw *hw = &pf->hw;
254 	status = ixl_set_i2c_data(pf, &i2cctl, data);
256 		ixl_raise_i2c_clk(pf, &i2cctl);
261 		ixl_lower_i2c_clk(pf, &i2cctl);
269 		ixl_dbg(pf, IXL_DBG_I2C, "I2C data was not set to %#x\n", data);
283 ixl_clock_out_i2c_byte(struct ixl_pf *pf, u8 data)
285 	struct i40e_hw *hw = &pf->hw;
295 		status = ixl_clock_out_i2c_bit(pf, bit);
319 ixl_lower_i2c_clk(struct ixl_pf *pf, u32 *i2cctl)
321 	struct i40e_hw *hw = &pf->hw;
341 ixl_raise_i2c_clk(struct ixl_pf *pf, u32 *i2cctl)
343 	struct i40e_hw *hw = &pf->hw;
371 ixl_get_i2c_data(struct ixl_pf *pf, u32 *i2cctl)
392 ixl_set_i2c_data(struct ixl_pf *pf, u32 *i2cctl, bool data)
394 	struct i40e_hw *hw = &pf->hw;
413 	if (data != ixl_get_i2c_data(pf, i2cctl)) {
415 		ixl_dbg(pf, IXL_DBG_I2C, "Error - I2C data was not set to %X.\n", data);
426 ixl_i2c_start(struct ixl_pf *pf)
428 	struct i40e_hw *hw = &pf->hw;
434 	ixl_set_i2c_data(pf, &i2cctl, 1);
435 	ixl_raise_i2c_clk(pf, &i2cctl);
440 	ixl_set_i2c_data(pf, &i2cctl, 0);
445 	ixl_lower_i2c_clk(pf, &i2cctl);
456 ixl_read_i2c_byte_bb(struct ixl_pf *pf, u8 byte_offset,
459 	struct i40e_hw *hw = &pf->hw;
472 		ixl_i2c_start(pf);
475 		status = ixl_clock_out_i2c_byte(pf, dev_addr);
477 			ixl_dbg(pf, IXL_DBG_I2C, "dev_addr clock out error\n");
481 		status = ixl_get_i2c_ack(pf);
483 			ixl_dbg(pf, IXL_DBG_I2C, "dev_addr i2c ack error\n");
487 		status = ixl_clock_out_i2c_byte(pf, byte_offset);
489 			ixl_dbg(pf, IXL_DBG_I2C, "byte_offset clock out error\n");
493 		status = ixl_get_i2c_ack(pf);
495 			ixl_dbg(pf, IXL_DBG_I2C, "byte_offset i2c ack error\n");
499 		ixl_i2c_start(pf);
502 		status = ixl_clock_out_i2c_byte(pf, (dev_addr | 0x1));
506 		status = ixl_get_i2c_ack(pf);
510 		status = ixl_clock_in_i2c_byte(pf, data);
514 		status = ixl_clock_out_i2c_bit(pf, nack);
518 		ixl_i2c_stop(pf);
523 		ixl_i2c_bus_clear(pf);
527 			ixl_dbg(pf, IXL_DBG_I2C, "I2C byte read error - Retrying\n");
529 			ixl_dbg(pf, IXL_DBG_I2C, "I2C byte read error\n");
545 ixl_write_i2c_byte_bb(struct ixl_pf *pf, u8 byte_offset,
548 	struct i40e_hw *hw = &pf->hw;
559 		ixl_i2c_start(pf);
561 		status = ixl_clock_out_i2c_byte(pf, dev_addr);
565 		status = ixl_get_i2c_ack(pf);
569 		status = ixl_clock_out_i2c_byte(pf, byte_offset);
573 		status = ixl_get_i2c_ack(pf);
577 		status = ixl_clock_out_i2c_byte(pf, data);
581 		status = ixl_get_i2c_ack(pf);
585 		ixl_i2c_stop(pf);
589 		ixl_i2c_bus_clear(pf);
593 			ixl_dbg(pf, IXL_DBG_I2C, "I2C byte write error - Retrying\n");
595 			ixl_dbg(pf, IXL_DBG_I2C, "I2C byte write error\n");
611 ixl_read_i2c_byte_reg(struct ixl_pf *pf, u8 byte_offset,
614 	struct i40e_hw *hw = &pf->hw;
633 		ixl_dbg(pf, IXL_DBG_I2C, "I2C byte read error\n");
641 ixl_write_i2c_byte_reg(struct ixl_pf *pf, u8 byte_offset,
644 	struct i40e_hw *hw = &pf->hw;
650 	status = ixl_read_i2c_byte_reg(pf, byte_offset + 1, dev_addr, &upperbyte);
669 		ixl_dbg(pf, IXL_DBG_I2C, "I2C byte write error\n");
699 ixl_read_i2c_byte_aq(struct ixl_pf *pf, u8 byte_offset,
702 	struct i40e_hw *hw = &pf->hw;
713 		ixl_dbg(pf, IXL_DBG_I2C, "I2C byte read status %s, error %s\n",
725 ixl_write_i2c_byte_aq(struct ixl_pf *pf, u8 byte_offset,
728 	struct i40e_hw *hw = &pf->hw;
738 		ixl_dbg(pf, IXL_DBG_I2C, "I2C byte write status %s, error %s\n",