From 1beb5b56913ba4e87eefa2cd938938956cd5e9fc Mon Sep 17 00:00:00 2001 From: juhosg Date: Tue, 29 Apr 2008 17:18:21 +0000 Subject: [package] remove the i2c-gpio-custom driver from adm5120, and make it available on all platforms git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10979 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- package/i2c-gpio-custom/Makefile | 55 +++++++ package/i2c-gpio-custom/src/Kconfig | 10 ++ package/i2c-gpio-custom/src/Makefile | 1 + package/i2c-gpio-custom/src/i2c-gpio-custom.c | 197 ++++++++++++++++++++++++++ package/kernel/modules/i2c.mk | 18 +-- 5 files changed, 264 insertions(+), 17 deletions(-) create mode 100644 package/i2c-gpio-custom/Makefile create mode 100644 package/i2c-gpio-custom/src/Kconfig create mode 100644 package/i2c-gpio-custom/src/Makefile create mode 100644 package/i2c-gpio-custom/src/i2c-gpio-custom.c (limited to 'package') diff --git a/package/i2c-gpio-custom/Makefile b/package/i2c-gpio-custom/Makefile new file mode 100644 index 000000000..fd448cec4 --- /dev/null +++ b/package/i2c-gpio-custom/Makefile @@ -0,0 +1,55 @@ +# +# Copyright (C) 2008 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# + +include $(TOPDIR)/rules.mk +include $(INCLUDE_DIR)/kernel.mk + +PKG_NAME:=i2c-gpio-custom +PKG_RELEASE:=1 + +include $(INCLUDE_DIR)/package.mk + +define KernelPackage/i2c-gpio-custom + SUBMENU:=I2C support + TITLE:=Custom GPIO-based I2C device + DEPENDS:=@GPIO_SUPPORT kmod-i2c-core +kmod-i2c-gpio + FILES:=$(PKG_BUILD_DIR)/i2c-gpio-custom.$(LINUX_KMOD_SUFFIX) + AUTOLOAD:=$(call AutoLoad,58,i2c-gpio-custom) + KCONFIG:= +endef + +define KernelPackage/i2c-gpio-custom/description + Kernel module for register a custom i2c-gpio platform device. +endef + +EXTRA_KCONFIG:= \ + CONFIG_I2C_GPIO_CUSTOM=m + +EXTRA_CFLAGS:= \ + $(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=m,%,$(filter %=m,$(EXTRA_KCONFIG)))) \ + $(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=y,%,$(filter %=y,$(EXTRA_KCONFIG)))) \ + +MAKE_OPTS:= \ + ARCH="$(LINUX_KARCH)" \ + CROSS_COMPILE="$(TARGET_CROSS)" \ + SUBDIRS="$(PKG_BUILD_DIR)" \ + EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \ + LINUXINCLUDE="-I$(LINUX_DIR)/include -include linux/autoconf.h" \ + $(EXTRA_KCONFIG) + +define Build/Prepare + mkdir -p $(PKG_BUILD_DIR) + $(CP) ./src/* $(PKG_BUILD_DIR)/ +endef + +define Build/Compile + $(MAKE) -C "$(LINUX_DIR)" \ + $(MAKE_OPTS) \ + modules +endef + +$(eval $(call KernelPackage,i2c-gpio-custom)) diff --git a/package/i2c-gpio-custom/src/Kconfig b/package/i2c-gpio-custom/src/Kconfig new file mode 100644 index 000000000..e2e3a68d9 --- /dev/null +++ b/package/i2c-gpio-custom/src/Kconfig @@ -0,0 +1,10 @@ +config I2C_GPIO_CUSTOM + tristate "Custom GPIO-based I2C driver" + depends on GENERIC_GPIO + select I2C_GPIO + help + This is an I2C driver to register 1 to 4 custom I2C buses using + GPIO lines. + + This support is also available as a module. If so, the module + will be called i2c-gpio-custom. diff --git a/package/i2c-gpio-custom/src/Makefile b/package/i2c-gpio-custom/src/Makefile new file mode 100644 index 000000000..dcb2e2abe --- /dev/null +++ b/package/i2c-gpio-custom/src/Makefile @@ -0,0 +1 @@ +obj-${CONFIG_I2C_GPIO_CUSTOM} += i2c-gpio-custom.o \ No newline at end of file diff --git a/package/i2c-gpio-custom/src/i2c-gpio-custom.c b/package/i2c-gpio-custom/src/i2c-gpio-custom.c new file mode 100644 index 000000000..36a8bf0e3 --- /dev/null +++ b/package/i2c-gpio-custom/src/i2c-gpio-custom.c @@ -0,0 +1,197 @@ +/* + * Custom GPIO-based I2C driver + * + * Copyright (C) 2007 Gabor Juhos + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * --------------------------------------------------------------------------- + * + * The behaviour of this driver can be altered by setting some parameters + * from the insmod command line. + * + * The following parameters are adjustable: + * + * bus0 These four arguments can be arrays of + * bus1 1-8 unsigned integers as follows: + * bus2 + * bus3 ,,,,,,, + * + * where: + * + * ID to used as device_id for the corresponding bus (required) + * GPIO pin ID to used for SDA (required) + * GPIO pin ID to used for SCL (required) + * signal toggle delay. + * clock stretching timeout. + * SDA is configured as open drain. + * SCL is configured as open drain. + * SCL output drivers cannot be turned off. + * + * See include/i2c-gpio.h for more information about the parameters. + * + * If this driver is built into the kernel, you can use the following kernel + * command line parameters, with the same values as the corresponding module + * parameters listed above: + * + * i2c-gpio-custom.bus0 + * i2c-gpio-custom.bus1 + * i2c-gpio-custom.bus2 + * i2c-gpio-custom.bus3 + */ + +#include +#include +#include +#include + +#include + +#define DRV_NAME "i2c-gpio-custom" +#define DRV_DESC "Custom GPIO-based I2C driver" +#define DRV_VERSION "0.1.0" + +#define PFX DRV_NAME ": " + +#define BUS_PARAM_ID 0 +#define BUS_PARAM_SDA 1 +#define BUS_PARAM_SCL 2 +#define BUS_PARAM_UDELAY 3 +#define BUS_PARAM_TIMEOUT 4 +#define BUS_PARAM_SDA_OD 5 +#define BUS_PARAM_SCL_OD 6 +#define BUS_PARAM_SCL_OO 7 + +#define BUS_PARAM_REQUIRED 3 +#define BUS_PARAM_COUNT 8 +#define BUS_COUNT_MAX 4 + +static unsigned int bus0[BUS_PARAM_COUNT] __initdata; +static unsigned int bus1[BUS_PARAM_COUNT] __initdata; +static unsigned int bus2[BUS_PARAM_COUNT] __initdata; +static unsigned int bus3[BUS_PARAM_COUNT] __initdata; + +static unsigned int bus_nump[BUS_COUNT_MAX] __initdata; + +#define BUS_PARM_DESC \ + " config -> id,sda,scl[,udelay,timeout,sda_od,scl_od,scl_oo]" + +module_param_array(bus0, uint, &bus_nump[0], 0); +MODULE_PARM_DESC(bus0, "bus0" BUS_PARM_DESC); +module_param_array(bus1, uint, &bus_nump[1], 0); +MODULE_PARM_DESC(bus1, "bus1" BUS_PARM_DESC); +module_param_array(bus2, uint, &bus_nump[2], 0); +MODULE_PARM_DESC(bus2, "bus2" BUS_PARM_DESC); +module_param_array(bus3, uint, &bus_nump[3], 0); +MODULE_PARM_DESC(bus3, "bus3" BUS_PARM_DESC); + +static struct platform_device *devices[BUS_COUNT_MAX]; +static unsigned int nr_devices; + +static void i2c_gpio_custom_cleanup(void) +{ + int i; + + for (i = 0; i < nr_devices; i++) + if (devices[i]) + platform_device_unregister(devices[i]); +} + +static int __init i2c_gpio_custom_add_one(unsigned int id, unsigned int *params) +{ + struct platform_device *pdev; + struct i2c_gpio_platform_data pdata; + int err; + + if (!bus_nump[id]) + return 0; + + if (bus_nump[id] < BUS_PARAM_REQUIRED) { + printk(KERN_ERR PFX "not enough parameters for bus%d\n", id); + err = -EINVAL; + goto err; + } + + pdev = platform_device_alloc("i2c-gpio", params[BUS_PARAM_ID]); + if (!pdev) { + err = -ENOMEM; + goto err; + } + + devices[nr_devices++] = pdev; + + pdata.sda_pin = params[BUS_PARAM_SDA]; + pdata.scl_pin = params[BUS_PARAM_SCL]; + pdata.udelay = params[BUS_PARAM_UDELAY]; + pdata.timeout = params[BUS_PARAM_TIMEOUT]; + pdata.sda_is_open_drain = params[BUS_PARAM_SDA_OD] != 0; + pdata.scl_is_open_drain = params[BUS_PARAM_SCL_OD] != 0; + pdata.scl_is_output_only = params[BUS_PARAM_SCL_OO] != 0; + + err = platform_device_add_data(pdev, &pdata, sizeof(pdata)); + if (err) + goto err; + + err = platform_device_register(pdev); + if (err) + goto err; + + return 0; + +err: + return err; +} + +static int __init i2c_gpio_custom_probe(void) +{ + int err; + + printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n"); + + err = i2c_gpio_custom_add_one(0, bus0); + if (err) goto err; + + err = i2c_gpio_custom_add_one(1, bus1); + if (err) goto err; + + err = i2c_gpio_custom_add_one(2, bus2); + if (err) goto err; + + err = i2c_gpio_custom_add_one(3, bus3); + if (err) goto err; + + if (!nr_devices) { + printk(KERN_ERR PFX "no bus parameter(s) specified\n"); + err = -ENODEV; + goto err; + } + + return 0; + +err: + i2c_gpio_custom_cleanup(); + return err; +} + +#ifdef MODULE +static int __init i2c_gpio_custom_init(void) +{ + return i2c_gpio_custom_probe(); +} +module_init(i2c_gpio_custom_init); + +static void __exit i2c_gpio_custom_exit(void) +{ + i2c_gpio_custom_cleanup(); +} +module_exit(i2c_gpio_custom_exit); +#else +subsys_initcall(i2c_gpio_custom_probe); +#endif /* MODULE*/ + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Gabor Juhos "); +MODULE_DESCRIPTION(DRV_DESC); +MODULE_VERSION(DRV_VERSION); diff --git a/package/kernel/modules/i2c.mk b/package/kernel/modules/i2c.mk index c02672f43..687fa9fb2 100644 --- a/package/kernel/modules/i2c.mk +++ b/package/kernel/modules/i2c.mk @@ -93,22 +93,6 @@ endef $(eval $(call KernelPackage,i2c-gpio)) -define KernelPackage/i2c-gpio-custom - SUBMENU:=$(I2C_MENU) - TITLE:=Custom GPIO-based I2C device - DEPENDS:=@TARGET_adm5120 kmod-i2c-core +kmod-i2c-gpio - KCONFIG:=CONFIG_I2C_GPIO_CUSTOM - FILES:=$(LINUX_DIR)/drivers/i2c/busses/i2c-gpio-custom.$(LINUX_KMOD_SUFFIX) - AUTOLOAD:=$(call AutoLoad,58,i2c-gpio-custom) -endef - -define KernelPackage/i2c-gpio-custom/description - Kernel module for register a custom i2c-gpio platform device. -endef - -$(eval $(call KernelPackage,i2c-gpio-custom)) - - define KernelPackage/i2c-scx200 SUBMENU:=$(I2C_MENU) TITLE:=Geode SCx200 I2C using GPIO pins @@ -135,7 +119,7 @@ define KernelPackage/i2c-scx200-acb endef define KernelPackage/i2c-scx200-acb/description - Kernel module for I2C using the ACCESS.bus controllers on the Geode SCx200 + Kernel module for I2C using the ACCESS.bus controllers on the Geode SCx200 and SC1100 processors and the CS5535 and CS5536 Geode companion devices. endef -- cgit v1.2.3