+/*
+ * Copyright © 2021 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_MMC5983_H_
+#define _AO_MMC5983_H_
+
+#define MMC5983_READ 0x80
+
+#define MMC5983_CONFIG_A 0
+
+#define MMC5983_CONFIG_A_MA 5
+#define MMC5983_CONFIG_A_MA_1 0
+#define MMC5983_CONFIG_A_MA_2 1
+#define MMC5983_CONFIG_A_MA_4 2
+#define MMC5983_CONFIG_A_MA_8 3
+#define MMC5983_CONFIG_A_MA_MASK 3
+
+#define MMC5983_CONFIG_A_DO 2
+#define MMC5983_CONFIG_A_DO_0_75 0
+#define MMC5983_CONFIG_A_DO_1_5 1
+#define MMC5983_CONFIG_A_DO_3 2
+#define MMC5983_CONFIG_A_DO_7_5 3
+#define MMC5983_CONFIG_A_DO_15 4
+#define MMC5983_CONFIG_A_DO_30 5
+#define MMC5983_CONFIG_A_DO_75 6
+#define MMC5983_CONFIG_A_DO_MASK 7
+
+#define MMC5983_CONFIG_A_MS 0
+#define MMC5983_CONFIG_A_MS_NORMAL 0
+#define MMC5983_CONFIG_A_MS_POSITIVE_BIAS 1
+#define MMC5983_CONFIG_A_MS_NEGATIVE_BIAS 2
+#define MMC5983_CONFIG_A_MS_MASK 3
+
+#define MMC5983_CONFIG_B 1
+
+#define MMC5983_CONFIG_B_GN 5
+#define MMC5983_CONFIG_B_GN_0_88 0
+#define MMC5983_CONFIG_B_GN_1_3 1
+#define MMC5983_CONFIG_B_GN_1_9 2
+#define MMC5983_CONFIG_B_GN_2_5 3
+#define MMC5983_CONFIG_B_GN_4_0 4
+#define MMC5983_CONFIG_B_GN_4_7 5
+#define MMC5983_CONFIG_B_GN_5_6 6
+#define MMC5983_CONFIG_B_GN_8_1 7
+#define MMC5983_CONFIG_B_GN_MASK 7
+
+#define MMC5983_MODE 2
+#define MMC5983_MODE_CONTINUOUS 0
+#define MMC5983_MODE_SINGLE 1
+#define MMC5983_MODE_IDLE 2
+
+#define MMC5983_X_OUT_0 0
+#define MMC5983_X_OUT_1 1
+#define MMC5983_Y_OUT_0 2
+#define MMC5983_Y_OUT_1 3
+#define MMC5983_Z_OUT_0 4
+#define MMC5983_Z_OUT_1 5
+#define MMC5983_XYZ_OUT_2 6
+#define MMC5983_T_OUT 7
+
+#define MMC5983_STATUS 8
+# define MMC5983_STATUS_OTP_READ_DONE 4
+# define MMC5983_STATUS_MEAS_T_DONE 1
+# define MMC5983_STATUS_MEAS_M_DONE 0
+
+#define MMC5983_CONTROL_0 9
+# define MMC5983_CONTROL_0_OTP_READ 6
+# define MMC5983_CONTROL_0_AUTO_SR_EN 5
+# define MMC5983_CONTROL_0_RESET 4
+# define MMC5983_CONTROL_0_SET 3
+# define MMC5983_CONTROL_0_INT_MEAS_DONE_EN 2
+# define MMC5983_CONTROL_0_TM_T 1
+# define MMC5983_CONTROL_0_TM_M 0
+
+#define MMC5983_CONTROL_1 0xa
+# define MMC5983_CONTROL_1_SW_RST 7
+# define MMC5983_CONTROL_1_YZ_INHIBIT 3
+# define MMC5983_CONTROL_1_X_INHIBIT 2
+# define MMC5983_CONTROL_1_BW 0
+# define MMC5983_CONTROL_1_BW_100 0
+# define MMC5983_CONTROL_1_BW_200 1
+# define MMC5983_CONTROL_1_BW_400 2
+# define MMC5983_CONTROL_1_BW_800 3
+#define MMC5983_CONTROL_2 0xb
+# define MMC5983_CONTROL_2_EN_PRD_SET 7
+# define MMC5983_CONTROL_2_PRD_SET 4
+# define MMC5983_CONTROL_2_PRD_SET_1 0
+# define MMC5983_CONTROL_2_PRD_SET_25 1
+# define MMC5983_CONTROL_2_PRD_SET_75 2
+# define MMC5983_CONTROL_2_PRD_SET_100 3
+# define MMC5983_CONTROL_2_PRD_SET_250 4
+# define MMC5983_CONTROL_2_PRD_SET_500 5
+# define MMC5983_CONTROL_2_PRD_SET_1000 6
+# define MMC5983_CONTROL_2_PRD_SET_2000 7
+# define MMC5983_CONTROL_2_CMM_EN 3
+# define MMC5983_CONTROL_2_CM_FREQ 0
+# define MMC5983_CONTROL_2_CM_FREQ_OFF 0
+# define MMC5983_CONTROL_2_CM_FREQ_1HZ 1
+# define MMC5983_CONTROL_2_CM_FREQ_10HZ 2
+# define MMC5983_CONTROL_2_CM_FREQ_20HZ 3
+# define MMC5983_CONTROL_2_CM_FREQ_50HZ 4
+# define MMC5983_CONTROL_2_CM_FREQ_100HZ 5
+# define MMC5983_CONTROL_2_CM_FREQ_200HZ 6
+# define MMC5983_CONTROL_2_CM_FREQ_1000HZ 7
+
+#define MMC5983_CONTROL_3 0xc
+#define MMC5983_CONTROL_3_SPI_3W 6
+#define MMC5983_CONTROL_3_ST_ENM 2
+#define MMC5983_CONTROL_3_ST_ENP 1
+
+#define MMC5983_PRODUCT_ID 0x2f
+#define MMC5983_PRODUCT_ID_PRODUCT 0x30
+
+struct ao_mmc5983_sample {
+ int16_t x, y, z;
+};
+
+struct ao_mmc5983_raw {
+ uint8_t addr;
+ uint8_t x0;
+ uint8_t x1;
+ uint8_t y0;
+ uint8_t y1;
+ uint8_t z0;
+ uint8_t z1;
+ uint8_t xyz2;
+};
+
+extern struct ao_mmc5983_sample ao_mmc5983_current;
+
+void
+ao_mmc5983_init(void);
+
+#endif /* _AO_MMC5983_H_ */