[ep93xx] add support for the Simplemachines Sim.One board

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18540 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 225 insertions, 0 deletions

diff --git a/target/linux/ep93xx/patches-2.6.30/003-ep93xx-i2c.patch b/target/linux/ep93xx/patches-2.6.30/003-ep93xx-i2c.patch
new file mode 100644
index 000000000..aaf4d3ca8
--- /dev/null
+++ b/target/linux/ep93xx/patches-2.6.30/003-ep93xx-i2c.patch
@@ -0,0 +1,225 @@
+Index: linux-2.6.30.9/drivers/i2c/busses/Kconfig
+===================================================================
+--- linux-2.6.30.9.orig/drivers/i2c/busses/Kconfig	2009-11-24 21:00:21.000000000 +0100
++++ linux-2.6.30.9/drivers/i2c/busses/Kconfig	2009-11-24 21:00:23.000000000 +0100
+@@ -326,6 +326,10 @@
+ 	  devices such as DaVinci NIC.
+ 	  For details please see http://www.ti.com/davinci
+ 
++config I2C_EP93XX
++	tristate "EP93XX I2C"
++	depends on I2C && ARCH_EP93XX
++
+ config I2C_GPIO
+ 	tristate "GPIO-based bitbanging I2C"
+ 	depends on GENERIC_GPIO
+Index: linux-2.6.30.9/drivers/i2c/busses/Makefile
+===================================================================
+--- linux-2.6.30.9.orig/drivers/i2c/busses/Makefile	2009-11-24 21:00:21.000000000 +0100
++++ linux-2.6.30.9/drivers/i2c/busses/Makefile	2009-11-24 21:00:23.000000000 +0100
+@@ -30,6 +30,7 @@
+ 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_EP93XX)	+= i2c-ep93xx.o
+ obj-$(CONFIG_I2C_GPIO)		+= i2c-gpio.o
+ obj-$(CONFIG_I2C_HIGHLANDER)	+= i2c-highlander.o
+ obj-$(CONFIG_I2C_IBM_IIC)	+= i2c-ibm_iic.o
+Index: linux-2.6.30.9/drivers/i2c/busses/i2c-ep93xx.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.9/drivers/i2c/busses/i2c-ep93xx.c	2009-11-24 21:00:38.000000000 +0100
+@@ -0,0 +1,193 @@
++/* ------------------------------------------------------------------------ *
++ * i2c-ep933xx.c I2C bus glue for Cirrus EP93xx                             *
++ * ------------------------------------------------------------------------ *
++
++   Copyright (C) 2004 Michael Burian
++
++   Based on i2c-parport-light.c
++   Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
++
++   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/config.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/ioport.h>
++#include <linux/delay.h>
++#include <linux/i2c.h>
++#include <linux/i2c-algo-bit.h>
++#include <asm/io.h>
++#include <mach/hardware.h>
++
++//1/(2*clockfrequency)
++#define EE_DELAY_USEC       50
++#define GPIOG_EECLK 1
++#define GPIOG_EEDAT 2
++
++/* ----- I2C algorithm call-back functions and structures ----------------- */
++
++// TODO: optimize
++static void ep93xx_setscl(void *data, int state)
++{
++	unsigned int uiPGDR, uiPGDDR;
++
++	uiPGDR = inl(GPIO_PGDR);
++	uiPGDDR = inl(GPIO_PGDDR);
++
++	/* Configure the clock line as output. */
++	uiPGDDR |= GPIOG_EECLK;
++	outl(uiPGDDR, GPIO_PGDDR);
++
++	/* Set clock line to state */
++	if(state)
++		uiPGDR |= GPIOG_EECLK;
++	else
++		uiPGDR &= ~GPIOG_EECLK;
++
++	outl(uiPGDR, GPIO_PGDR);
++}
++
++static void ep93xx_setsda(void *data, int state)
++{
++	unsigned int uiPGDR, uiPGDDR;
++
++	uiPGDR = inl(GPIO_PGDR);
++	uiPGDDR = inl(GPIO_PGDDR);
++
++	/* Configure the data line as output. */
++	uiPGDDR |= GPIOG_EEDAT;
++	outl(uiPGDDR, GPIO_PGDDR);
++
++	/* Set data line to state */
++	if(state)
++		uiPGDR |= GPIOG_EEDAT;
++	else
++		uiPGDR &= ~GPIOG_EEDAT;
++
++	outl(uiPGDR, GPIO_PGDR);
++}
++
++static int ep93xx_getscl(void *data)
++{
++	unsigned int uiPGDR, uiPGDDR;
++
++	uiPGDR = inl(GPIO_PGDR);
++	uiPGDDR = inl(GPIO_PGDDR);
++
++	/* Configure the clock line as input */
++	uiPGDDR &= ~GPIOG_EECLK;
++	outl(uiPGDDR, GPIO_PGDDR);
++
++	/* Return state of the clock line */
++	return (inl(GPIO_PGDR) & GPIOG_EECLK) ? 1 : 0;
++}
++
++static int ep93xx_getsda(void *data)
++{
++	unsigned int uiPGDR, uiPGDDR;
++	uiPGDR = inl(GPIO_PGDR);
++	uiPGDDR = inl(GPIO_PGDDR);
++
++	/* Configure the data line as input */
++	uiPGDDR &= ~GPIOG_EEDAT;
++	outl(uiPGDDR, GPIO_PGDDR);
++
++	/* Return state of the data line */
++	return (inl(GPIO_PGDR) & GPIOG_EEDAT) ? 1 : 0;
++}
++
++/* ------------------------------------------------------------------------
++ * Encapsulate the above functions in the correct operations structure.
++ * This is only done when more than one hardware adapter is supported.
++ */
++
++/* last line (us, ms, timeout)
++ * us dominates the bit rate: 10us  means: 100Kbit/sec(25 means 40kbps)
++ *                            10ms  not known
++ *                            100ms timeout
++ */
++static struct i2c_algo_bit_data ep93xx_data = {
++	.setsda		= ep93xx_setsda,
++	.setscl		= ep93xx_setscl,
++	.getsda		= ep93xx_getsda,
++	.getscl		= ep93xx_getscl,
++	.udelay		= 10,
++	//.mdelay		= 10,
++	.timeout	= HZ,
++};
++
++/* ----- I2c structure ---------------------------------------------------- */
++static struct i2c_adapter ep93xx_adapter = {
++	.owner		= THIS_MODULE,
++	.class		= I2C_CLASS_HWMON,
++	.algo_data	= &ep93xx_data,
++	.name		= "EP93XX I2C bit-bang interface",
++};
++
++/* ----- Module loading, unloading and information ------------------------ */
++
++static int __init i2c_ep93xx_init(void)
++{
++	unsigned long uiPGDR, uiPGDDR;
++
++	/* Read the current value of the GPIO data and data direction registers. */
++	uiPGDR = inl(GPIO_PGDR);
++	uiPGDDR = inl(GPIO_PGDDR);
++
++	/* If the GPIO pins have not been configured since reset, the data
++	 * and clock lines will be set as inputs and with data value of 0.
++	 * External pullup resisters are pulling them high.
++	 * Set them both high before configuring them as outputs. */
++	uiPGDR |= (GPIOG_EEDAT | GPIOG_EECLK);
++	outl(uiPGDR, GPIO_PGDR);
++
++	/* Delay to meet the EE Interface timing specification. */
++	udelay(EE_DELAY_USEC);
++
++
++	/* Configure the EE data and clock lines as outputs. */
++	uiPGDDR |= (GPIOG_EEDAT | GPIOG_EECLK);
++	outl(uiPGDDR, GPIO_PGDDR);
++
++	/* Delay to meet the EE Interface timing specification. */
++	udelay(EE_DELAY_USEC);
++
++	/* Reset hardware to a sane state (SCL and SDA high) */
++	ep93xx_setsda(NULL, 1);
++	ep93xx_setscl(NULL, 1);
++
++	if (i2c_bit_add_bus(&ep93xx_adapter) > 0) {
++		printk(KERN_ERR "i2c-ep93xx: Unable to register with I2C\n");
++		return -ENODEV;
++	}
++
++	return 0;
++}
++
++static void __exit i2c_ep93xx_exit(void)
++{
++	//i2c_bit_del_bus(&ep93xx_adapter);
++	i2c_del_adapter(&ep93xx_adapter);
++}
++
++MODULE_AUTHOR("Michael Burian");
++MODULE_DESCRIPTION("I2C bus glue for Cirrus EP93xx processors");
++MODULE_LICENSE("GPL");
++
++module_init(i2c_ep93xx_init);
++module_exit(i2c_ep93xx_exit);