summaryrefslogtreecommitdiff
path: root/arch/arm/include/asm/arch-omap24xx/i2c.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/include/asm/arch-omap24xx/i2c.h')
-rw-r--r--arch/arm/include/asm/arch-omap24xx/i2c.h172
1 files changed, 172 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-omap24xx/i2c.h b/arch/arm/include/asm/arch-omap24xx/i2c.h
new file mode 100644
index 0000000..19046aa
--- /dev/null
+++ b/arch/arm/include/asm/arch-omap24xx/i2c.h
@@ -0,0 +1,172 @@
+/*
+ * (C) Copyright 2004
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 _OMAP24XX_I2C_H_
+#define _OMAP24XX_I2C_H_
+
+#define I2C_BASE1 0x48070000
+#define I2C_BASE2 0x48072000 /* nothing hooked up on h4 */
+
+#define I2C_DEFAULT_BASE I2C_BASE1
+
+struct i2c {
+ unsigned short rev; /* 0x00 */
+ unsigned short res1;
+ unsigned short ie; /* 0x04 */
+ unsigned short res2;
+ unsigned short stat; /* 0x08 */
+ unsigned short res3;
+ unsigned short iv; /* 0x0C */
+ unsigned short res4[3];
+ unsigned short buf; /* 0x14 */
+ unsigned short res5;
+ unsigned short cnt; /* 0x18 */
+ unsigned short res6;
+ unsigned short data; /* 0x1C */
+ unsigned short res7;
+ unsigned short sysc; /* 0x20 */
+ unsigned short res8;
+ unsigned short con; /* 0x24 */
+ unsigned short res9;
+ unsigned short oa; /* 0x28 */
+ unsigned short res10;
+ unsigned short sa; /* 0x2C */
+ unsigned short res11;
+ unsigned short psc; /* 0x30 */
+ unsigned short res12;
+ unsigned short scll; /* 0x34 */
+ unsigned short res13;
+ unsigned short sclh; /* 0x38 */
+ unsigned short res14;
+ unsigned short systest; /* 0x3c */
+ unsigned short res15;
+};
+
+#define I2C_BUS_MAX 2
+
+/* I2C masks */
+
+/* I2C Interrupt Enable Register (I2C_IE): */
+#define I2C_IE_GC_IE (1 << 5)
+#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_SBD (1 << 15) /* Single byte data */
+#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_GC (1 << 5)
+#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 */
+
+/* I2C Buffer Configuration Register (I2C_BUF): */
+
+#define I2C_BUF_RDMA_EN (1 << 15) /* Receive DMA channel enable */
+#define I2C_BUF_XDMA_EN (1 << 7) /* Transmit DMA channel enable */
+
+/* I2C Configuration Register (I2C_CON): */
+
+#define I2C_CON_EN (1 << 15) /* I2C module enable */
+#define I2C_CON_BE (1 << 14) /* Big endian mode */
+#define I2C_CON_STB (1 << 11) /* Start byte mode (master mode only) */
+#define I2C_CON_MST (1 << 10) /* Master/slave mode */
+#define I2C_CON_TRX (1 << 9) /* Transmitter/receiver mode (master mode only) */
+#define I2C_CON_XA (1 << 8) /* Expand address */
+#define I2C_CON_STP (1 << 1) /* Stop condition (master mode only) */
+#define I2C_CON_STT (1 << 0) /* Start condition (master mode only) */
+
+/* I2C System Test Register (I2C_SYSTEST): */
+
+#define I2C_SYSTEST_ST_EN (1 << 15) /* System test enable */
+#define I2C_SYSTEST_FREE (1 << 14) /* Free running mode (on breakpoint) */
+#define I2C_SYSTEST_TMODE_MASK (3 << 12) /* Test mode select */
+#define I2C_SYSTEST_TMODE_SHIFT (12) /* Test mode select */
+#define I2C_SYSTEST_SCL_I (1 << 3) /* SCL line sense input value */
+#define I2C_SYSTEST_SCL_O (1 << 2) /* SCL line drive output value */
+#define I2C_SYSTEST_SDA_I (1 << 1) /* SDA line sense input value */
+#define I2C_SYSTEST_SDA_O (1 << 0) /* SDA line drive output value */
+
+/* These values were copied from omap3, include/asm-arm/arch-omap3/i2c.h. */
+#define OMAP_I2C_STANDARD 100000
+#define OMAP_I2C_FAST_MODE 400000
+#define OMAP_I2C_HIGH_SPEED 3400000
+
+#define SYSTEM_CLOCK_12 12000000
+#define SYSTEM_CLOCK_13 13000000
+#define SYSTEM_CLOCK_192 19200000
+#define SYSTEM_CLOCK_96 96000000
+
+#ifndef I2C_IP_CLK
+#define I2C_IP_CLK SYSTEM_CLOCK_96
+#endif
+
+#ifndef I2C_INTERNAL_SAMPLING_CLK
+#define I2C_INTERNAL_SAMPLING_CLK 19200000
+#endif
+
+/* These are the trim values for standard and fast speed */
+#ifndef I2C_FASTSPEED_SCLL_TRIM
+#define I2C_FASTSPEED_SCLL_TRIM 6
+#endif
+#ifndef I2C_FASTSPEED_SCLH_TRIM
+#define I2C_FASTSPEED_SCLH_TRIM 6
+#endif
+
+/* These are the trim values for high speed */
+#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM
+#define I2C_HIGHSPEED_PHASE_ONE_SCLL_TRIM I2C_FASTSPEED_SCLL_TRIM
+#endif
+#ifndef I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM
+#define I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM I2C_FASTSPEED_SCLH_TRIM
+#endif
+#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM
+#define I2C_HIGHSPEED_PHASE_TWO_SCLL_TRIM I2C_FASTSPEED_SCLL_TRIM
+#endif
+#ifndef I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM
+#define I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM I2C_FASTSPEED_SCLH_TRIM
+#endif
+
+#define I2C_PSC_MAX 0x0f
+#define I2C_PSC_MIN 0x00
+
+
+#endif