diff -urN linux-2.6.19/drivers/i2c/busses/Kconfig linux-2.6.19.new/drivers/i2c/busses/Kconfig --- linux-2.6.19/drivers/i2c/busses/Kconfig 2006-11-29 22:57:37.000000000 +0100 +++ linux-2.6.19.new/drivers/i2c/busses/Kconfig 2006-12-28 17:04:34.000000000 +0100 @@ -84,6 +84,16 @@ This driver can also be built as a module. If so, the module will be called i2c-au1550. +config I2C_AU1X00GPIO + tristate "Au1x00 i2c using GPIO pins" + depends on I2C && MTX1 + help + If you say yest to this option, support will be included for the + Au1x00 GPIO interface. + + This driver can also be built as a module. If so, the module + will be called i2c-au1x00gpio. + config I2C_ELEKTOR tristate "Elektor ISA card" depends on I2C && ISA && BROKEN_ON_SMP diff -urN linux-2.6.19/drivers/i2c/busses/Makefile linux-2.6.19.new/drivers/i2c/busses/Makefile --- linux-2.6.19/drivers/i2c/busses/Makefile 2006-11-29 22:57:37.000000000 +0100 +++ linux-2.6.19.new/drivers/i2c/busses/Makefile 2006-12-28 03:07:37.000000000 +0100 @@ -9,6 +9,7 @@ obj-$(CONFIG_I2C_AMD756_S4882) += i2c-amd756-s4882.o obj-$(CONFIG_I2C_AMD8111) += i2c-amd8111.o obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o +obj-$(CONFIG_I2C_AU1X00GPIO) += i2c-au1x00gpio.o obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o obj-$(CONFIG_I2C_HYDRA) += i2c-hydra.o obj-$(CONFIG_I2C_I801) += i2c-i801.o diff -urN linux-2.6.19/drivers/i2c/busses/i2c-au1x00gpio.c linux-2.6.19.new/drivers/i2c/busses/i2c-au1x00gpio.c --- linux-2.6.19/drivers/i2c/busses/i2c-au1x00gpio.c 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.19.new/drivers/i2c/busses/i2c-au1x00gpio.c 2006-12-28 17:02:10.000000000 +0100 @@ -0,0 +1,421 @@ +/* ------------------------------------------------------------------------- */ +/* i2c-au1x00gpio.c i2c-hw access for Au1x00 GPIO pins. */ +/* ------------------------------------------------------------------------- */ +/* Copyright (C) 1995-2000 Michael Stickel + + 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. */ +/* ------------------------------------------------------------------------- */ + +/* With some changes from Ky�stialkki and even + Frodo Looijaard + Simon G. Vogl +*/ + +/* $Id: i2c-au1x00gpio.c,v 1.1.1.2 2004/01/22 15:35:47 br1 Exp $ */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#ifndef __exit +#define __exit __init +#endif + + +struct i2c_au1x00gpio +{ + struct i2c_au1x00gpio *next; + + short scl_gpio; + short sda_gpio; + + unsigned long scl_mask; + unsigned long sda_mask; + + struct i2c_adapter adapter; + struct i2c_algo_bit_data bit_au1x00gpio_data; +}; + +static struct i2c_au1x00gpio *adapter_list; + + + +/* ----- global defines ----------------------------------------------- */ +#define DEB(x) /* should be reasonable open, close &c. */ +#define DEB2(x) /* low level debugging - very slow */ +#define DEBE(x) x /* error messages */ + +/* ----- printer port defines ------------------------------------------*/ + +/* ----- local functions ---------------------------------------------- */ + + +//-- Primary GPIO +static void bit_au1x00gpio_setscl(void *data, int state) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + if (state) + au_writel(adapter->scl_mask, SYS_TRIOUTCLR); // Disable Driver: Switch off Transistor => 1 + else + au_writel(adapter->scl_mask, SYS_OUTPUTCLR); // Clear Output and switch on Transistor => 0 +} + + +static void bit_au1x00gpio_setsda(void *data, int state) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + if (state) + au_writel(adapter->sda_mask, SYS_TRIOUTCLR); + else + au_writel(adapter->sda_mask, SYS_OUTPUTCLR); +} + + +static int bit_au1x00gpio_getscl(void *data) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + return (au_readl(SYS_PINSTATERD) & adapter->scl_mask) ? 1 : 0; +} + + +static int bit_au1x00gpio_getsda(void *data) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + return (au_readl(SYS_PINSTATERD) & adapter->sda_mask) ? 1 : 0; +} + + + + +/*-- + *-- Functions for accessing GPIO-2 + *-- + */ +static void bit_au1x00gpio2_setscl(void *data, int state) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + if (state) + { + au_writel(au_readl(GPIO2_DIR) & ~adapter->scl_mask, GPIO2_DIR); + } + else + { + au_writel(au_readl(GPIO2_OUTPUT) & ~adapter->scl_mask, GPIO2_OUTPUT); + au_writel(au_readl(GPIO2_DIR) | adapter->scl_mask, GPIO2_DIR); + } +} + +static void bit_au1x00gpio2_setsda(void *data, int state) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + if (state) + { + au_writel(au_readl(GPIO2_DIR) & ~adapter->sda_mask, GPIO2_DIR); + } + else + { + au_writel(au_readl(GPIO2_OUTPUT) & ~adapter->sda_mask, GPIO2_OUTPUT); + au_writel(au_readl(GPIO2_DIR) | adapter->sda_mask, GPIO2_DIR); + } +} + +static int bit_au1x00gpio2_getscl(void *data) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + return (au_readl(GPIO2_PINSTATE) & adapter->scl_mask) ? 1 : 0; +} + +static int bit_au1x00gpio2_getsda(void *data) +{ + struct i2c_au1x00gpio * adapter = (struct i2c_au1x00gpio *)data; + return (au_readl(GPIO2_PINSTATE) & adapter->sda_mask) ? 1 : 0; +} + + + +static int check_i2c_au1x00gpio_adapter(struct i2c_au1x00gpio *adapter) +{ + int state = 0; + + adapter->bit_au1x00gpio_data.setsda (adapter, 1); + adapter->bit_au1x00gpio_data.setscl (adapter, 1); + + if (adapter->bit_au1x00gpio_data.getsda(adapter)==0) + { + printk ("i2c-au1x00gpio: sda line should read 1 but reads 0\n"); + state = -1; + } + if (adapter->bit_au1x00gpio_data.getscl(adapter)==0) + { + printk ("i2c-au1x00gpio: scl line should read 1 but reads 0\n"); + state = -1; + } + + + adapter->bit_au1x00gpio_data.setsda (adapter, 0); + adapter->bit_au1x00gpio_data.setscl (adapter, 0); + + if (adapter->bit_au1x00gpio_data.getsda(adapter)==1) + { + printk ("i2c-au1x00gpio: sda line should read 0 but reads 1\n"); + state = -1; + } + if (adapter->bit_au1x00gpio_data.getscl(adapter)==1) + { + printk ("i2c-au1x00gpio: scl line should read 0 but reads 1\n"); + state = -1; + } + + if (state==0) + printk ("i2c-au1x00gpio: adapter with scl=GPIO%d,sda=GPIO%d is working\n", + adapter->scl_gpio, adapter->sda_gpio + ); + return state; +} + + + +#if 0 +static int bit_au1x00gpio_reg(struct i2c_client *client) +{ + return 0; +} + +static int bit_au1x00gpio_unreg(struct i2c_client *client) +{ + return 0; +} + +static void bit_au1x00gpio_inc_use(struct i2c_adapter *adap) +{ + MOD_INC_USE_COUNT; +} + +static void bit_au1x00gpio_dec_use(struct i2c_adapter *adap) +{ + MOD_DEC_USE_COUNT; +} +#endif + + + +static struct i2c_algo_bit_data bit_au1x00gpio_data = { + .data = NULL, + .setsda = bit_au1x00gpio_setsda, + .setscl = bit_au1x00gpio_setscl, + .getsda = bit_au1x00gpio_getsda, + .getscl = bit_au1x00gpio_getscl, + .udelay = 80, + .timeout = HZ, +}; + + +static struct i2c_adapter bit_au1x00gpio_ops = { + .owner = THIS_MODULE, + .name = "Au1x00 GPIO I2C adapter", + .id = I2C_HW_B_AU1x00GPIO, +}; + + + +/* + * scl_gpio: + * 0..31 for primary GPIO's + * 200..215 for secondary GPIO's + * + * sda_gpio: + * 0..31 for primary GPIO's + * 200..215 for secondary GPIO's + * + * You can even mix primary and secondary GPIO's. + * E.g.: i2c_au1x00gpio_create(4,206); + */ + +static int i2c_au1x00gpio_create (int scl_gpio, int sda_gpio) +{ + if ((scl_gpio < 32 || (scl_gpio >= 200 && scl_gpio <= 215)) && + (scl_gpio < 32 || (scl_gpio >= 200 && scl_gpio <= 215))) + { + struct i2c_au1x00gpio *adapter = kmalloc(sizeof(struct i2c_au1x00gpio), + GFP_KERNEL); + if (!adapter) { + printk(KERN_ERR "i2c-au1x00-gpio: Unable to malloc.\n"); + return -1; + } + + printk(KERN_DEBUG "i2c-au1x00-gpio.o: attaching to SCL=GPIO%d, SDA=GPIO%d\n", + scl_gpio, sda_gpio); + + memset (adapter, 0, sizeof(struct i2c_au1x00gpio)); + + adapter->adapter = bit_au1x00gpio_ops; + + adapter->adapter.algo_data = &adapter->bit_au1x00gpio_data; + adapter->bit_au1x00gpio_data = bit_au1x00gpio_data; + adapter->bit_au1x00gpio_data.data = adapter; + + adapter->bit_au1x00gpio_data.data = adapter; + + adapter->scl_gpio = scl_gpio; + adapter->sda_gpio = sda_gpio; + + if (sda_gpio < 32) + { + adapter->bit_au1x00gpio_data.setsda = bit_au1x00gpio_setsda; + adapter->bit_au1x00gpio_data.getsda = bit_au1x00gpio_getsda; + adapter->sda_mask = 1<= 200 && sda_gpio <= 215) + { + adapter->bit_au1x00gpio_data.setsda = bit_au1x00gpio2_setsda; + adapter->bit_au1x00gpio_data.getsda = bit_au1x00gpio2_getsda; + adapter->sda_mask = 1<<(sda_gpio-200); + } + + + if (scl_gpio < 32) + { + adapter->bit_au1x00gpio_data.setscl = bit_au1x00gpio_setscl; + adapter->bit_au1x00gpio_data.getscl = bit_au1x00gpio_getscl; + adapter->scl_mask = 1<= 200 && scl_gpio <= 215) + { + adapter->bit_au1x00gpio_data.setscl = bit_au1x00gpio2_setscl; + adapter->bit_au1x00gpio_data.getscl = bit_au1x00gpio2_getscl; + adapter->scl_mask = 1<<(scl_gpio-200); + } + + au_writel(0L, SYS_PININPUTEN); + if (check_i2c_au1x00gpio_adapter(adapter)==0) + { + adapter->bit_au1x00gpio_data.setsda (adapter, 1); + adapter->bit_au1x00gpio_data.setscl (adapter, 1); + + if (i2c_bit_add_bus(&adapter->adapter) < 0) + { + printk(KERN_ERR "i2c-au1x00-gpio: Unable to register with I2C.\n"); + kfree(adapter); + return -1; /* No good */ + } + + adapter->next = adapter_list; + adapter_list = adapter; + return 0; + } + } + else + printk(KERN_ERR "i2c-au1x00-gpio: Invalid argument scl_gpio=%d, sda_gpio=%d.\n", scl_gpio, sda_gpio); + return -1; +} + + + +static void i2c_au1x00gpio_delete (int scl_gpio, int sda_gpio) +{ + struct i2c_au1x00gpio *adapter, *prev = NULL; + + for (adapter = adapter_list; adapter; adapter = adapter->next) + { + if (adapter->scl_gpio == scl_gpio && + adapter->sda_gpio == sda_gpio) + { + i2c_bit_del_bus(&adapter->adapter); + if (prev) + prev->next = adapter->next; + else + adapter_list = adapter->next; + kfree(adapter); + return; + } + prev = adapter; + } +} + + + + + +#ifndef CONFIG_I2C_AU1X00GPIO_SCL +#define CONFIG_I2C_AU1X00GPIO_SCL (216) +#endif + +#ifndef CONFIG_I2C_AU1X00GPIO_SDA +#define CONFIG_I2C_AU1X00GPIO_SDA (217) +#endif + +static int au1x00gpiopin_scl = CONFIG_I2C_AU1X00GPIO_SCL; +static int au1x00gpiopin_sda = CONFIG_I2C_AU1X00GPIO_SDA; + + + +int __init i2c_bit_au1x00gpio_init(void) +{ + printk(KERN_INFO "i2c-au1x00gpio.o: i2c Au1x00 GPIO adapter module version\n"); + + if (i2c_au1x00gpio_create (au1x00gpiopin_scl, au1x00gpiopin_sda) == 0) + { + printk(KERN_INFO "i2c-au1x00gpio.o: registered I2C-Bus for GPIO%d,GPIO%d\n", + au1x00gpiopin_scl, au1x00gpiopin_sda + ); + return 0; + } + printk(KERN_INFO "i2c-au1x00gpio.o: failed to register I2C-Bus for GPIO%d,GPIO%d\n", + au1x00gpiopin_scl, au1x00gpiopin_sda + ); + return -1; +} + + +void __exit i2c_bit_au1x00gpio_exit(void) +{ + i2c_au1x00gpio_delete (au1x00gpiopin_scl, au1x00gpiopin_sda); +} + +module_param(au1x00gpiopin_scl, int, 0644); +MODULE_PARM_DESC(au1x00gpiopin_scl, "GPIO pin number used for SCL pin."); + +module_param(au1x00gpiopin_sda, int, 0644); +MODULE_PARM_DESC(au1x00gpiopin_sda, "GPIO pin number used for SDA pin."); + +MODULE_AUTHOR("Michael Stickel "); +MODULE_DESCRIPTION("I2C-Bus adapter routines for Au1x00 GPIO adapter."); +MODULE_LICENSE("GPL"); + + +#ifdef MODULE +int init_module(void) +{ + return i2c_bit_au1x00gpio_init(); +} + +void cleanup_module(void) +{ + i2c_bit_au1x00gpio_exit(); +} +#endif