GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/include/drivers/nxp/i2c/i2c.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2016-2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+
+#ifndef I2C_H
+#define I2C_H
+
+#include <lib/mmio.h>
+
+#define I2C_TIMEOUT	1000	/* ms */
+
+#define I2C_FD_CONSERV	0x7e
+#define I2C_CR_DIS	(1 << 7)
+#define I2C_CR_EN	(0 << 7)
+#define I2C_CR_MA	(1 << 5)
+#define I2C_CR_TX	(1 << 4)
+#define I2C_CR_TX_NAK	(1 << 3)
+#define I2C_CR_RSTA	(1 << 2)
+#define I2C_SR_BB	(1 << 5)
+#define I2C_SR_IDLE	(0 << 5)
+#define I2C_SR_AL	(1 << 4)
+#define I2C_SR_IF	(1 << 1)
+#define I2C_SR_RX_NAK	(1 << 0)
+#define I2C_SR_RST	(I2C_SR_AL | I2C_SR_IF)
+
+#define I2C_GLITCH_EN	0x8
+
+#define i2c_in(a)	mmio_read_8((uintptr_t)(a))
+#define i2c_out(a, v)	mmio_write_8((uintptr_t)(a), (v))
+
+struct ls_i2c {
+	unsigned char ad;	/* I2c Bus Address Register */
+	unsigned char fd;	/* I2c Bus Frequency Dividor Register */
+	unsigned char cr;	/* I2c Bus Control Register */
+	unsigned char sr;	/* I2c Bus Status Register */
+	unsigned char dr;	/* I2C Bus Data I/O Register */
+	unsigned char ic;	/* I2C Bus Interrupt Config Register */
+	unsigned char dbg;	/* I2C Bus Debug Register */
+};
+
+void i2c_init(uintptr_t nxp_i2c_addr);
+int i2c_read(unsigned char chip, int addr, int alen,
+	     unsigned char *buf, int len);
+int i2c_write(unsigned char chip, int addr, int alen,
+	      const unsigned char *buf, int len);
+int i2c_probe_chip(unsigned char chip);
+
+#endif /* I2C_H */