1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
15 u32 ic_con; /* 0x00 */
16 u32 ic_tar; /* 0x04 */
17 u32 ic_sar; /* 0x08 */
18 u32 ic_hs_maddr; /* 0x0c */
19 u32 ic_cmd_data; /* 0x10 */
20 u32 ic_ss_scl_hcnt; /* 0x14 */
21 u32 ic_ss_scl_lcnt; /* 0x18 */
22 u32 ic_fs_scl_hcnt; /* 0x1c */
23 u32 ic_fs_scl_lcnt; /* 0x20 */
24 u32 ic_hs_scl_hcnt; /* 0x24 */
25 u32 ic_hs_scl_lcnt; /* 0x28 */
26 u32 ic_intr_stat; /* 0x2c */
27 u32 ic_intr_mask; /* 0x30 */
28 u32 ic_raw_intr_stat; /* 0x34 */
29 u32 ic_rx_tl; /* 0x38 */
30 u32 ic_tx_tl; /* 0x3c */
31 u32 ic_clr_intr; /* 0x40 */
32 u32 ic_clr_rx_under; /* 0x44 */
33 u32 ic_clr_rx_over; /* 0x48 */
34 u32 ic_clr_tx_over; /* 0x4c */
35 u32 ic_clr_rd_req; /* 0x50 */
36 u32 ic_clr_tx_abrt; /* 0x54 */
37 u32 ic_clr_rx_done; /* 0x58 */
38 u32 ic_clr_activity; /* 0x5c */
39 u32 ic_clr_stop_det; /* 0x60 */
40 u32 ic_clr_start_det; /* 0x64 */
41 u32 ic_clr_gen_call; /* 0x68 */
42 u32 ic_enable; /* 0x6c */
43 u32 ic_status; /* 0x70 */
44 u32 ic_txflr; /* 0x74 */
45 u32 ic_rxflr; /* 0x78 */
46 u32 ic_sda_hold; /* 0x7c */
47 u32 ic_tx_abrt_source; /* 0x80 */
48 u32 slv_data_nak_only;
54 u32 ic_enable_status; /* 0x9c */
58 u8 reserved[0xf4 - 0xac];
59 u32 comp_param1; /* 0xf4 */
64 #define IC_CLK 166666666
65 #define NANO_TO_KILO 1000000
67 /* High and low times in different speed modes (in ns) */
68 #define MIN_SS_SCL_HIGHTIME 4000
69 #define MIN_SS_SCL_LOWTIME 4700
70 #define MIN_FS_SCL_HIGHTIME 600
71 #define MIN_FS_SCL_LOWTIME 1300
72 #define MIN_FP_SCL_HIGHTIME 260
73 #define MIN_FP_SCL_LOWTIME 500
74 #define MIN_HS_SCL_HIGHTIME 60
75 #define MIN_HS_SCL_LOWTIME 160
77 /* Worst case timeout for 1 byte is kept as 2ms */
78 #define I2C_BYTE_TO (CONFIG_SYS_HZ/500)
79 #define I2C_STOPDET_TO (CONFIG_SYS_HZ/500)
80 #define I2C_BYTE_TO_BB (I2C_BYTE_TO * 16)
82 /* i2c control register definitions */
83 #define IC_CON_SD 0x0040
84 #define IC_CON_RE 0x0020
85 #define IC_CON_10BITADDRMASTER 0x0010
86 #define IC_CON_10BITADDR_SLAVE 0x0008
87 #define IC_CON_SPD_MSK 0x0006
88 #define IC_CON_SPD_SS 0x0002
89 #define IC_CON_SPD_FS 0x0004
90 #define IC_CON_SPD_HS 0x0006
91 #define IC_CON_MM 0x0001
93 /* i2c target address register definitions */
94 #define TAR_ADDR 0x0050
96 /* i2c slave address register definitions */
97 #define IC_SLAVE_ADDR 0x0002
99 /* i2c data buffer and command register definitions */
100 #define IC_CMD 0x0100
101 #define IC_STOP 0x0200
103 /* i2c interrupt status register definitions */
104 #define IC_GEN_CALL 0x0800
105 #define IC_START_DET 0x0400
106 #define IC_STOP_DET 0x0200
107 #define IC_ACTIVITY 0x0100
108 #define IC_RX_DONE 0x0080
109 #define IC_TX_ABRT 0x0040
110 #define IC_RD_REQ 0x0020
111 #define IC_TX_EMPTY 0x0010
112 #define IC_TX_OVER 0x0008
113 #define IC_RX_FULL 0x0004
114 #define IC_RX_OVER 0x0002
115 #define IC_RX_UNDER 0x0001
117 /* fifo threshold register definitions */
126 #define IC_RX_TL IC_TL0
127 #define IC_TX_TL IC_TL0
129 /* i2c enable register definitions */
130 #define IC_ENABLE_0B 0x0001
132 /* i2c status register definitions */
133 #define IC_STATUS_SA 0x0040
134 #define IC_STATUS_MA 0x0020
135 #define IC_STATUS_RFF 0x0010
136 #define IC_STATUS_RFNE 0x0008
137 #define IC_STATUS_TFE 0x0004
138 #define IC_STATUS_TFNF 0x0002
139 #define IC_STATUS_ACT 0x0001
142 * struct dw_scl_sda_cfg - I2C timing configuration
144 * @has_high_speed: Support high speed (3.4Mbps)
145 * @ss_hcnt: Standard speed high time in ns
146 * @fs_hcnt: Fast speed high time in ns
147 * @ss_lcnt: Standard speed low time in ns
148 * @fs_lcnt: Fast speed low time in ns
149 * @sda_hold: SDA hold time
151 struct dw_scl_sda_cfg {
161 * struct dw_i2c_speed_config - timings to use for a particular speed
163 * This holds calculated values to be written to the I2C controller. Each value
164 * is represented as a number of IC clock cycles.
166 * @scl_lcnt: Low count value for SCL
167 * @scl_hcnt: High count value for SCL
168 * @sda_hold: Data hold count
169 * @speed_mode: Speed mode being used
171 struct dw_i2c_speed_config {
172 /* SCL high and low period count */
176 enum i2c_speed_mode speed_mode;
180 * struct dw_i2c - private information for the bus
182 * @regs: Registers pointer
183 * @scl_sda_cfg: Deprecated information for x86 (should move to device tree)
184 * @resets: Resets for the I2C controller
185 * @scl_rise_time_ns: Configured SCL rise time in nanoseconds
186 * @scl_fall_time_ns: Configured SCL fall time in nanoseconds
187 * @sda_hold_time_ns: Configured SDA hold time in nanoseconds
188 * @has_spk_cnt: true if the spike-count register is present
189 * @clk: Clock input to the I2C controller
192 struct i2c_regs *regs;
193 struct dw_scl_sda_cfg *scl_sda_cfg;
194 struct reset_ctl_bulk resets;
195 u32 scl_rise_time_ns;
196 u32 scl_fall_time_ns;
197 u32 sda_hold_time_ns;
199 #if CONFIG_IS_ENABLED(CLK)
204 extern const struct dm_i2c_ops designware_i2c_ops;
206 int designware_i2c_probe(struct udevice *bus);
207 int designware_i2c_remove(struct udevice *dev);
208 int designware_i2c_ofdata_to_platdata(struct udevice *bus);
210 #endif /* __DW_I2C_H_ */