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authorStefan Roese <sr@denx.de>2007-02-20 10:27:08 +0100
committerStefan Roese <sr@denx.de>2007-02-20 10:27:08 +0100
commit79b2d0bb2eae09602448f7a7cb56530d2f31e6c6 (patch)
treeec226ccf8314e37981f946df4391446a6ff9dc11 /include
parent7372ca68227930d03cffa548310524cad5b96733 (diff)
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[PATCH] PPC4xx: Add support for multiple I2C busses
This patch adds support for multiple I2C busses on the PPC4xx platforms. Define CONFIG_I2C_MULTI_BUS in the board config file to make use of this feature. It also merges the 405 and 440 i2c header files into one common file 4xx_i2c.h. Also the 4xx i2c reset procedure is reworked since I experienced some problems with the first access on the 440SPe Katmai board. Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'include')
-rw-r--r--include/405gp_i2c.h64
-rw-r--r--include/440_i2c.h71
-rw-r--r--include/4xx_i2c.h122
-rw-r--r--include/i2c.h10
4 files changed, 132 insertions, 135 deletions
diff --git a/include/405gp_i2c.h b/include/405gp_i2c.h
deleted file mode 100644
index 5a9a497..0000000
--- a/include/405gp_i2c.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#ifndef _405gp_i2c_h_
-#define _405gp_i2c_h_
-
-#define I2C_REGISTERS_BASE_ADDRESS 0xEF600500
-#define IIC_MDBUF (I2C_REGISTERS_BASE_ADDRESS+IICMDBUF)
-#define IIC_SDBUF (I2C_REGISTERS_BASE_ADDRESS+IICSDBUF)
-#define IIC_LMADR (I2C_REGISTERS_BASE_ADDRESS+IICLMADR)
-#define IIC_HMADR (I2C_REGISTERS_BASE_ADDRESS+IICHMADR)
-#define IIC_CNTL (I2C_REGISTERS_BASE_ADDRESS+IICCNTL)
-#define IIC_MDCNTL (I2C_REGISTERS_BASE_ADDRESS+IICMDCNTL)
-#define IIC_STS (I2C_REGISTERS_BASE_ADDRESS+IICSTS)
-#define IIC_EXTSTS (I2C_REGISTERS_BASE_ADDRESS+IICEXTSTS)
-#define IIC_LSADR (I2C_REGISTERS_BASE_ADDRESS+IICLSADR)
-#define IIC_HSADR (I2C_REGISTERS_BASE_ADDRESS+IICHSADR)
-#define IIC_CLKDIV (I2C_REGISTERS_BASE_ADDRESS+IICCLKDIV)
-#define IIC_INTRMSK (I2C_REGISTERS_BASE_ADDRESS+IICINTRMSK)
-#define IIC_XFRCNT (I2C_REGISTERS_BASE_ADDRESS+IICXFRCNT)
-#define IIC_XTCNTLSS (I2C_REGISTERS_BASE_ADDRESS+IICXTCNTLSS)
-#define IIC_DIRECTCNTL (I2C_REGISTERS_BASE_ADDRESS+IICDIRECTCNTL)
-
-/* MDCNTL Register Bit definition */
-#define IIC_MDCNTL_HSCL 0x01
-#define IIC_MDCNTL_EUBS 0x02
-#define IIC_MDCNTL_EINT 0x04
-#define IIC_MDCNTL_ESM 0x08
-#define IIC_MDCNTL_FSM 0x10
-#define IIC_MDCNTL_EGC 0x20
-#define IIC_MDCNTL_FMDB 0x40
-#define IIC_MDCNTL_FSDB 0x80
-
-/* CNTL Register Bit definition */
-#define IIC_CNTL_PT 0x01
-#define IIC_CNTL_READ 0x02
-#define IIC_CNTL_CHT 0x04
-#define IIC_CNTL_RPST 0x08
-/* bit 2/3 for Transfer count*/
-#define IIC_CNTL_AMD 0x40
-#define IIC_CNTL_HMT 0x80
-
-/* STS Register Bit definition */
-#define IIC_STS_PT 0X01
-#define IIC_STS_IRQA 0x02
-#define IIC_STS_ERR 0X04
-#define IIC_STS_SCMP 0x08
-#define IIC_STS_MDBF 0x10
-#define IIC_STS_MDBS 0X20
-#define IIC_STS_SLPR 0x40
-#define IIC_STS_SSS 0x80
-
-/* EXTSTS Register Bit definition */
-#define IIC_EXTSTS_XFRA 0X01
-#define IIC_EXTSTS_ICT 0X02
-#define IIC_EXTSTS_LA 0X04
-
-/* XTCNTLSS Register Bit definition */
-#define IIC_XTCNTLSS_SRST 0x01
-#define IIC_XTCNTLSS_EPI 0x02
-#define IIC_XTCNTLSS_SDBF 0x04
-#define IIC_XTCNTLSS_SBDD 0x08
-#define IIC_XTCNTLSS_SWS 0x10
-#define IIC_XTCNTLSS_SWC 0x20
-#define IIC_XTCNTLSS_SRS 0x40
-#define IIC_XTCNTLSS_SRC 0x80
-#endif
diff --git a/include/440_i2c.h b/include/440_i2c.h
deleted file mode 100644
index 0c2bf36..0000000
--- a/include/440_i2c.h
+++ /dev/null
@@ -1,71 +0,0 @@
-#ifndef _440_i2c_h_
-#define _440_i2c_h_
-
-#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
- defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
-#define I2C_BASE_ADDR (CFG_PERIPHERAL_BASE + 0x00000700)
-#else
-#define I2C_BASE_ADDR (CFG_PERIPHERAL_BASE + 0x00000400)
-#endif /*CONFIG_440EP CONFIG_440GR*/
-
-#define I2C_REGISTERS_BASE_ADDRESS I2C_BASE_ADDR
-#define IIC_MDBUF (I2C_REGISTERS_BASE_ADDRESS+IICMDBUF)
-#define IIC_SDBUF (I2C_REGISTERS_BASE_ADDRESS+IICSDBUF)
-#define IIC_LMADR (I2C_REGISTERS_BASE_ADDRESS+IICLMADR)
-#define IIC_HMADR (I2C_REGISTERS_BASE_ADDRESS+IICHMADR)
-#define IIC_CNTL (I2C_REGISTERS_BASE_ADDRESS+IICCNTL)
-#define IIC_MDCNTL (I2C_REGISTERS_BASE_ADDRESS+IICMDCNTL)
-#define IIC_STS (I2C_REGISTERS_BASE_ADDRESS+IICSTS)
-#define IIC_EXTSTS (I2C_REGISTERS_BASE_ADDRESS+IICEXTSTS)
-#define IIC_LSADR (I2C_REGISTERS_BASE_ADDRESS+IICLSADR)
-#define IIC_HSADR (I2C_REGISTERS_BASE_ADDRESS+IICHSADR)
-#define IIC_CLKDIV (I2C_REGISTERS_BASE_ADDRESS+IICCLKDIV)
-#define IIC_INTRMSK (I2C_REGISTERS_BASE_ADDRESS+IICINTRMSK)
-#define IIC_XFRCNT (I2C_REGISTERS_BASE_ADDRESS+IICXFRCNT)
-#define IIC_XTCNTLSS (I2C_REGISTERS_BASE_ADDRESS+IICXTCNTLSS)
-#define IIC_DIRECTCNTL (I2C_REGISTERS_BASE_ADDRESS+IICDIRECTCNTL)
-
-/* MDCNTL Register Bit definition */
-#define IIC_MDCNTL_HSCL 0x01
-#define IIC_MDCNTL_EUBS 0x02
-#define IIC_MDCNTL_EINT 0x04
-#define IIC_MDCNTL_ESM 0x08
-#define IIC_MDCNTL_FSM 0x10
-#define IIC_MDCNTL_EGC 0x20
-#define IIC_MDCNTL_FMDB 0x40
-#define IIC_MDCNTL_FSDB 0x80
-
-/* CNTL Register Bit definition */
-#define IIC_CNTL_PT 0x01
-#define IIC_CNTL_READ 0x02
-#define IIC_CNTL_CHT 0x04
-#define IIC_CNTL_RPST 0x08
-/* bit 2/3 for Transfer count*/
-#define IIC_CNTL_AMD 0x40
-#define IIC_CNTL_HMT 0x80
-
-/* STS Register Bit definition */
-#define IIC_STS_PT 0X01
-#define IIC_STS_IRQA 0x02
-#define IIC_STS_ERR 0X04
-#define IIC_STS_SCMP 0x08
-#define IIC_STS_MDBF 0x10
-#define IIC_STS_MDBS 0X20
-#define IIC_STS_SLPR 0x40
-#define IIC_STS_SSS 0x80
-
-/* EXTSTS Register Bit definition */
-#define IIC_EXTSTS_XFRA 0X01
-#define IIC_EXTSTS_ICT 0X02
-#define IIC_EXTSTS_LA 0X04
-
-/* XTCNTLSS Register Bit definition */
-#define IIC_XTCNTLSS_SRST 0x01
-#define IIC_XTCNTLSS_EPI 0x02
-#define IIC_XTCNTLSS_SDBF 0x04
-#define IIC_XTCNTLSS_SBDD 0x08
-#define IIC_XTCNTLSS_SWS 0x10
-#define IIC_XTCNTLSS_SWC 0x20
-#define IIC_XTCNTLSS_SRS 0x40
-#define IIC_XTCNTLSS_SRC 0x80
-#endif
diff --git a/include/4xx_i2c.h b/include/4xx_i2c.h
new file mode 100644
index 0000000..66b7997
--- /dev/null
+++ b/include/4xx_i2c.h
@@ -0,0 +1,122 @@
+/*
+ * (C) Copyright 2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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 _4xx_i2c_h_
+#define _4xx_i2c_h_
+
+#define IIC_OK 0
+#define IIC_NOK 1
+#define IIC_NOK_LA 2 /* Lost arbitration */
+#define IIC_NOK_ICT 3 /* Incomplete transfer */
+#define IIC_NOK_XFRA 4 /* Transfer aborted */
+#define IIC_NOK_DATA 5 /* No data in buffer */
+#define IIC_NOK_TOUT 6 /* Transfer timeout */
+
+#define IIC_TIMEOUT 1 /* 1 second */
+
+#if defined(CONFIG_I2C_MULTI_BUS)
+#define I2C_BUS_OFFS (i2c_bus_num * 0x100)
+#else
+#define I2C_BUS_OFFS (0x000)
+#endif /* CONFIG_I2C_MULTI_BUS */
+
+#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
+ defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
+#define I2C_BASE_ADDR (CFG_PERIPHERAL_BASE + 0x00000700 + I2C_BUS_OFFS)
+#elif defined(CONFIG_440)
+/* all remaining 440 variants */
+#define I2C_BASE_ADDR (CFG_PERIPHERAL_BASE + 0x00000400 + I2C_BUS_OFFS)
+#else
+/* all 405 variants */
+#define I2C_BASE_ADDR (0xEF600500 + I2C_BUS_OFFS)
+#endif
+
+#define I2C_REGISTERS_BASE_ADDRESS I2C_BASE_ADDR
+#define IIC_MDBUF (I2C_REGISTERS_BASE_ADDRESS+IICMDBUF)
+#define IIC_SDBUF (I2C_REGISTERS_BASE_ADDRESS+IICSDBUF)
+#define IIC_LMADR (I2C_REGISTERS_BASE_ADDRESS+IICLMADR)
+#define IIC_HMADR (I2C_REGISTERS_BASE_ADDRESS+IICHMADR)
+#define IIC_CNTL (I2C_REGISTERS_BASE_ADDRESS+IICCNTL)
+#define IIC_MDCNTL (I2C_REGISTERS_BASE_ADDRESS+IICMDCNTL)
+#define IIC_STS (I2C_REGISTERS_BASE_ADDRESS+IICSTS)
+#define IIC_EXTSTS (I2C_REGISTERS_BASE_ADDRESS+IICEXTSTS)
+#define IIC_LSADR (I2C_REGISTERS_BASE_ADDRESS+IICLSADR)
+#define IIC_HSADR (I2C_REGISTERS_BASE_ADDRESS+IICHSADR)
+#define IIC_CLKDIV (I2C_REGISTERS_BASE_ADDRESS+IICCLKDIV)
+#define IIC_INTRMSK (I2C_REGISTERS_BASE_ADDRESS+IICINTRMSK)
+#define IIC_XFRCNT (I2C_REGISTERS_BASE_ADDRESS+IICXFRCNT)
+#define IIC_XTCNTLSS (I2C_REGISTERS_BASE_ADDRESS+IICXTCNTLSS)
+#define IIC_DIRECTCNTL (I2C_REGISTERS_BASE_ADDRESS+IICDIRECTCNTL)
+
+/* MDCNTL Register Bit definition */
+#define IIC_MDCNTL_HSCL 0x01
+#define IIC_MDCNTL_EUBS 0x02
+#define IIC_MDCNTL_EINT 0x04
+#define IIC_MDCNTL_ESM 0x08
+#define IIC_MDCNTL_FSM 0x10
+#define IIC_MDCNTL_EGC 0x20
+#define IIC_MDCNTL_FMDB 0x40
+#define IIC_MDCNTL_FSDB 0x80
+
+/* CNTL Register Bit definition */
+#define IIC_CNTL_PT 0x01
+#define IIC_CNTL_READ 0x02
+#define IIC_CNTL_CHT 0x04
+#define IIC_CNTL_RPST 0x08
+/* bit 2/3 for Transfer count*/
+#define IIC_CNTL_AMD 0x40
+#define IIC_CNTL_HMT 0x80
+
+/* STS Register Bit definition */
+#define IIC_STS_PT 0x01
+#define IIC_STS_IRQA 0x02
+#define IIC_STS_ERR 0x04
+#define IIC_STS_SCMP 0x08
+#define IIC_STS_MDBF 0x10
+#define IIC_STS_MDBS 0x20
+#define IIC_STS_SLPR 0x40
+#define IIC_STS_SSS 0x80
+
+/* EXTSTS Register Bit definition */
+#define IIC_EXTSTS_XFRA 0x01
+#define IIC_EXTSTS_ICT 0x02
+#define IIC_EXTSTS_LA 0x04
+
+/* XTCNTLSS Register Bit definition */
+#define IIC_XTCNTLSS_SRST 0x01
+#define IIC_XTCNTLSS_EPI 0x02
+#define IIC_XTCNTLSS_SDBF 0x04
+#define IIC_XTCNTLSS_SBDD 0x08
+#define IIC_XTCNTLSS_SWS 0x10
+#define IIC_XTCNTLSS_SWC 0x20
+#define IIC_XTCNTLSS_SRS 0x40
+#define IIC_XTCNTLSS_SRC 0x80
+
+/* IICx_DIRECTCNTL register */
+#define IIC_DIRCNTL_SDAC 0x08
+#define IIC_DIRCNTL_SCC 0x04
+#define IIC_DIRCNTL_MSDA 0x02
+#define IIC_DIRCNTL_MSC 0x01
+
+#define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f)
+#endif
diff --git a/include/i2c.h b/include/i2c.h
index a8f729a..54c6f9f 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -46,6 +46,16 @@
*/
#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
+#if defined(CONFIG_I2C_MULTI_BUS)
+#define CFG_MAX_I2C_BUS 2
+#define I2C_GET_BUS() i2c_get_bus_num()
+#define I2C_SET_BUS(a) i2c_set_bus_num(a)
+#else
+#define CFG_MAX_I2C_BUS 1
+#define I2C_GET_BUS() 0
+#define I2C_SET_BUS(a)
+#endif
+
/*
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.