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Diffstat (limited to 'drivers/i2c/davinci_i2c.h')
-rw-r--r--drivers/i2c/davinci_i2c.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/i2c/davinci_i2c.h b/drivers/i2c/davinci_i2c.h
new file mode 100644
index 0000000..20d4342
--- /dev/null
+++ b/drivers/i2c/davinci_i2c.h
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2004-2014
+ * Texas Instruments, <www.ti.com>
+ *
+ * Some changes copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#ifndef _DAVINCI_I2C_H_
+#define _DAVINCI_I2C_H_
+
+#define I2C_WRITE 0
+#define I2C_READ 1
+
+struct i2c_regs {
+ u32 i2c_oa;
+ u32 i2c_ie;
+ u32 i2c_stat;
+ u32 i2c_scll;
+ u32 i2c_sclh;
+ u32 i2c_cnt;
+ u32 i2c_drr;
+ u32 i2c_sa;
+ u32 i2c_dxr;
+ u32 i2c_con;
+ u32 i2c_iv;
+ u32 res_2c;
+ u32 i2c_psc;
+};
+
+/* I2C masks */
+
+/* I2C Interrupt Enable Register (I2C_IE): */
+#define I2C_IE_SCD_IE (1 << 5) /* Stop condition detect interrupt enable */
+#define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */
+#define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */
+#define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */
+#define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */
+#define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */
+
+/* I2C Status Register (I2C_STAT): */
+
+#define I2C_STAT_BB (1 << 12) /* Bus busy */
+#define I2C_STAT_ROVR (1 << 11) /* Receive overrun */
+#define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */
+#define I2C_STAT_AAS (1 << 9) /* Address as slave */
+#define I2C_STAT_SCD (1 << 5) /* Stop condition detect */
+#define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */
+#define I2C_STAT_RRDY (1 << 3) /* Receive data ready */
+#define I2C_STAT_ARDY (1 << 2) /* Register access ready */
+#define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */
+#define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */
+
+/* I2C Interrupt Code Register (I2C_INTCODE): */
+
+#define I2C_INTCODE_MASK 7
+#define I2C_INTCODE_NONE 0
+#define I2C_INTCODE_AL 1 /* Arbitration lost */
+#define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */
+#define I2C_INTCODE_ARDY 3 /* Register access ready */
+#define I2C_INTCODE_RRDY 4 /* Rcv data ready */
+#define I2C_INTCODE_XRDY 5 /* Xmit data ready */
+#define I2C_INTCODE_SCD 6 /* Stop condition detect */
+
+/* I2C Configuration Register (I2C_CON): */
+
+#define I2C_CON_EN (1 << 5) /* I2C module enable */
+#define I2C_CON_STB (1 << 4) /* Start byte mode (master mode only) */
+#define I2C_CON_MST (1 << 10) /* Master/slave mode */
+#define I2C_CON_TRX (1 << 9) /* Tx/Rx mode (master mode only) */
+#define I2C_CON_XA (1 << 8) /* Expand address */
+#define I2C_CON_STP (1 << 11) /* Stop condition (master mode only) */
+#define I2C_CON_STT (1 << 13) /* Start condition (master mode only) */
+#define I2C_CON_FREE (1 << 14) /* Free run on emulation */
+
+#define I2C_TIMEOUT 0xffff0000 /* Timeout mask for poll_i2c_irq() */
+
+#endif