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]>
---
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:
- change bus-frequency -> clock-frequency to comply to OF standard.
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 7112a50..4aeefa6 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -350,6 +350,16 @@ 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 3c56bd9..bc6fc36 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_I2C_ACORN) += i2c-acorn.o
obj-$(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..2977dd0
--- /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
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+/* 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_READ513
+#define CPM_MAXBD 4
+
+#define I2C_EB (0x10) /* Big endian mode */
+#define I2C_EB_CPM2(0x30) /* Big endian mode, memory snoop */
+
+#define DPRAM_BASE ((u8 __iomem __force *)cpm_muram_addr(0))
+
+/* I2C parameter RAM. */
+struct i2c_ram {
+ ushort rbase; /* Rx Buffer descriptor base address */
+ ushort tbase; /* Tx Buffer descriptor base address */
+ u_char rfcr; /* Rx function code */
+ u_char tfcr; /* Tx function code */
+ ushort mrblr; /* Max receive buffer length */
+ uintrstate; /* Internal */
+ uintrdp;/* Internal */
+ ushort rbptr; /* Rx Buffer descriptor pointer */
+ ushort rbc;/* Internal */
+ uintrxtmp; /* Internal */
+ uinttstate; /* Internal */
+ uinttdp;/* Internal */
+ ushort tbptr; /* Tx Buffer descriptor pointer */
+ ushort tbc;/* Internal */
+ uinttxtmp; /* Internal */
+ charres1[4];/* Reserved */
+ ushort rpb
