Hi Jochen,
On Wed, May 21, 2008 at 12:43:22PM +0200, Jochen Friedrich wrote:
This driver uses the port of 2.4 code from Vitaly Bordug
[EMAIL PROTECTED] and the actual algorithm used by the i2c
driver of the DBox code on cvs.tuxboc.org from Felix Domke
([EMAIL PROTECTED]) and Gillem ([EMAIL PROTECTED]) converted to an
of_platform_driver. Tested on CPM1 (MPC823 on dbox2 hardware) and
CPM2 (MPC8272).
Signed-off-by: Jochen Friedrich [EMAIL PROTECTED]
---
Works on MPC8260.
Tested-by: Wolfram Sang [EMAIL PROTECTED]
drivers/i2c/busses/Kconfig | 10 +
drivers/i2c/busses/Makefile |1 +
drivers/i2c/busses/i2c-cpm.c | 745
++
3 files changed, 756 insertions(+), 0 deletions(-)
create mode 100644 drivers/i2c/busses/i2c-cpm.c
Changes since last version:
- fixed copy and paste bug (I2COM_MASTER - I2COM_START)
- changed dev_err() to dev_dbg() for NACK
- changed dev_dbg() to dev_err() for Timeout
- added explanation for brg formular
Typo: formula
- added bus-frequency OF attribute to be able to override i2c clock
\o/ Cool feature. Worked nicely.
- support for numbered adapter (it was already documented in
my booting-without-of patch but not yet implemented)
- finally changed i2c pseudo address 0xfe to 0x7f 1
- get rid of the fsl,cpm-i2c name. This logic was screwed
- fixed the error patch for request_irq failure
path instead of patch? But well, I assume typos in this section do not
matter much anyhow as they are not imported into git. Am I right, Jean?
- s/IIC/I2C/g
- fixed error output read timeout - transfer timeout
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 48438cc..c627b94 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -117,6 +117,16 @@ config I2C_BLACKFIN_TWI_CLK_KHZ
help
The unit of the TWI clock is kHz.
+config I2C_CPM
+ tristate Freescale CPM1 or CPM2 (MPC8xx/826x)
+ depends on (CPM1 || CPM2) OF_I2C
+ help
+ This supports the use of the I2C interface on Freescale
+ processors with CPM1 or CPM2.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-cpm.
+
config I2C_DAVINCI
tristate DaVinci I2C driver
depends on ARCH_DAVINCI
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index e8c882a..1ccd5ba 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_I2C_AMD8111) += i2c-amd8111.o
obj-$(CONFIG_I2C_AT91) += i2c-at91.o
obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o
obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o
+obj-$(CONFIG_I2C_CPM)+= i2c-cpm.o
obj-$(CONFIG_I2C_DAVINCI)+= i2c-davinci.o
obj-$(CONFIG_I2C_ELEKTOR)+= i2c-elektor.o
obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o
diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
new file mode 100644
index 000..305159c
--- /dev/null
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -0,0 +1,745 @@
+/*
+ * Freescale CPM1/CPM2 I2C interface.
+ * Copyright (c) 1999 Dan Malek ([EMAIL PROTECTED]).
+ *
+ * moved into proper i2c interface;
+ * Brad Parker ([EMAIL PROTECTED])
+ *
+ * Parts from dbox2_i2c.c (cvs.tuxbox.org)
+ * (C) 2000-2001 Felix Domke ([EMAIL PROTECTED]), Gillem ([EMAIL PROTECTED])
+ *
+ * (C) 2007 Montavista Software, Inc.
+ * Vitaly Bordug [EMAIL PROTECTED]
+ *
+ * Converted to of_platform_device. Renamed to i2c-cpm.c.
+ * (C) 2007,2008 Jochen Friedrich [EMAIL PROTECTED]
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include linux/kernel.h
+#include linux/module.h
+#include linux/delay.h
+#include linux/slab.h
+#include linux/init.h
+#include linux/interrupt.h
+#include linux/errno.h
+#include linux/stddef.h
+#include linux/i2c.h
+#include linux/io.h
+#include linux/dma-mapping.h
+#include linux/of_device.h
+#include linux/of_platform.h
+#include linux/of_i2c.h
+#include sysdev/fsl_soc.h
+#include asm/cpm.h
+
+/* Try to define this if you have an older CPU (earlier than rev D4) */
+/* However, better use a GPIO based bitbang driver in this case :/ */
+#undef I2C_CHIP_ERRATA
+
+#define CPM_MAX_READ
