i2c: add Faraday FTI2C010 I2C controller support

Faraday FTI2C010 is a multi-function I2C controller
which supports both master and slave mode.
This patch simplily implements the master mode only.

Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com>
CC: Heiko Schocher <hs@denx.de>

1 files changed, 81 insertions, 0 deletions

diff --git a/drivers/i2c/fti2c010.h b/drivers/i2c/fti2c010.h
new file mode 100644
index 0000000..18aec2c
--- /dev/null
+++ b/drivers/i2c/fti2c010.h
@@ -0,0 +1,81 @@
+/*
+ * Faraday I2C Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dantesu@faraday-tech.com>
+ *
+ * This file is released under the terms of GPL v2 and any later version.
+ * See the file COPYING in the root directory of the source tree for details.
+ */
+
+#ifndef __FTI2C010_H
+#define __FTI2C010_H
+
+/*
+ * FTI2C010 registers
+ */
+struct fti2c010_regs {
+	uint32_t cr;  /* 0x00: control register */
+	uint32_t sr;  /* 0x04: status register */
+	uint32_t cdr; /* 0x08: clock division register */
+	uint32_t dr;  /* 0x0c: data register */
+	uint32_t sar; /* 0x10: slave address register */
+	uint32_t tgsr;/* 0x14: time & glitch suppression register */
+	uint32_t bmr; /* 0x18: bus monitor register */
+	uint32_t rsvd[5];
+	uint32_t revr;/* 0x30: revision register */
+};
+
+/*
+ * control register
+ */
+#define CR_ALIRQ      0x2000  /* arbitration lost interrupt (master) */
+#define CR_SAMIRQ     0x1000  /* slave address match interrupt (slave) */
+#define CR_STOPIRQ    0x800   /* stop condition interrupt (slave) */
+#define CR_NAKRIRQ    0x400   /* NACK response interrupt (master) */
+#define CR_DRIRQ      0x200   /* rx interrupt (both) */
+#define CR_DTIRQ      0x100   /* tx interrupt (both) */
+#define CR_TBEN       0x80    /* tx enable (both) */
+#define CR_NAK        0x40    /* NACK (both) */
+#define CR_STOP       0x20    /* stop (master) */
+#define CR_START      0x10    /* start (master) */
+#define CR_GCEN       0x8     /* general call support (slave) */
+#define CR_SCLEN      0x4     /* enable clock out (master) */
+#define CR_I2CEN      0x2     /* enable I2C (both) */
+#define CR_I2CRST     0x1     /* reset I2C (both) */
+#define CR_ENABLE     \
+	(CR_ALIRQ | CR_NAKRIRQ | CR_DRIRQ | CR_DTIRQ | CR_SCLEN | CR_I2CEN)
+
+/*
+ * status register
+ */
+#define SR_CLRAL      0x400    /* clear arbitration lost */
+#define SR_CLRGC      0x200    /* clear general call */
+#define SR_CLRSAM     0x100    /* clear slave address match */
+#define SR_CLRSTOP    0x80     /* clear stop */
+#define SR_CLRNAKR    0x40     /* clear NACK respond */
+#define SR_DR         0x20     /* rx ready */
+#define SR_DT         0x10     /* tx done */
+#define SR_BB         0x8      /* bus busy */
+#define SR_BUSY       0x4      /* chip busy */
+#define SR_ACK        0x2      /* ACK/NACK received */
+#define SR_RW         0x1      /* set when master-rx or slave-tx mode */
+
+/*
+ * clock division register
+ */
+#define CDR_DIV(n)    ((n) & 0x3ffff)
+
+/*
+ * time & glitch suppression register
+ */
+#define TGSR_GSR(n)   (((n) & 0x7) << 10)
+#define TGSR_TSR(n)   ((n) & 0x3ff)
+
+/*
+ * bus monitor register
+ */
+#define BMR_SCL       0x2      /* SCL is pull-up */
+#define BMR_SDA       0x1      /* SDA is pull-up */
+
+#endif /* __FTI2C010_H */