mirror of https://github.com/OpenIPC/composer.git
Add i2c-gpio-custom package
Igor Zalatov (from Citadel PC)
parent
20fb998e52
commit
c7b4c95c30
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@ -0,0 +1,11 @@
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config BR2_PACKAGE_I2C_GPIO_CUSTOM
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bool "i2c-gpio-custom"
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depends on BR2_LINUX_KERNEL
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default y
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help
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Custom GPIO-based I2C driver
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https://raw.githubusercontent.com/digitalloggers/i2c-gpio-custom/master/i2c-gpio-custom.c
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comment "i2c-gpio-custom needs a Linux kernel to be built"
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depends on !BR2_LINUX_KERNEL
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@ -0,0 +1,19 @@
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################################################################################
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#
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# i2c-gpio-custom | updated 2022.11.14
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#
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################################################################################
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I2C_GPIO_CUSTOM_LICENSE = GPL-2.0
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I2C_GPIO_CUSTOM_LICENSE_FILES = COPYING
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define I2C_GPIO_CUSTOM_EXTRACT_CMDS
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cp ../general/package/i2c-gpio-custom/src/* $(@D)/
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endef
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I2C_GPIO_CUSTOM_MODULE_MAKE_OPTS = CONFIG_I2C_GPIO_CUSTOM=m \
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KVER=$(LINUX_VERSION_PROBED) \
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KSRC=$(LINUX_DIR)
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$(eval $(kernel-module))
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$(eval $(generic-package))
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@ -0,0 +1 @@
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obj-m := i2c-gpio-custom.o
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@ -0,0 +1,50 @@
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include Kbuild
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ifeq ($(KBUILD_MODULES),)
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KERNELRELEASE ?= `uname -r`
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KERNEL_DIR ?= /lib/modules/$(KERNELRELEASE)/build
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PWD := $(shell pwd)
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PREFIX ?= /usr/local
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BINDIR = $(PREFIX)/bin
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INSTALL = install
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INSTALL_PROGRAM = $(INSTALL) -p -m 755
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INSTALL_DIR = $(INSTALL) -p -m 755 -d
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INSTALL_DATA = $(INSTALL) -m 644
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SRCDIR ?= $(PREFIX)/kernel
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DESTDIR ?=
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DEPMOD ?= depmod
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DEPMODBASEDIR ?= /
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MODULE_OPTIONS = devices=2
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.PHONY: all install clean
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.PHONY: build
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all: build
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build:
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@echo "Building some OpenIPC drivers..."
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$(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules
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install:
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$(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules_install
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$(DEPMOD) -b "$(DEPMODBASEDIR)" -a $(KERNELRELEASE)
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@echo ""
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clean:
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rm -f *~
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rm -f Module.symvers Module.markers modules.order
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$(MAKE) -C $(KERNEL_DIR) M=$(PWD) clean
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.clang-format:
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curl "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/.clang-format" > $@
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.PHONY: clang-format
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clang-format: .clang-format
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clang-format -i *.c *.h
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endif # !kbuild
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@ -0,0 +1,292 @@
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/*
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* Custom GPIO-based I2C driver
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*
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* ---------------------------------------------------------------------------
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*
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* The behaviour of this driver can be altered by setting some parameters
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* from the insmod command line.
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*
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* The following parameters are adjustable:
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*
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* bus0 These four arguments can be arrays of
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* bus1 1-8 unsigned integers as follows:
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* bus2
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* bus3 <id>,<sda>,<scl>,<udelay>,<timeout>,<sda_od>,<scl_od>,<scl_oo>
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*
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* where:
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*
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* <id> ID to used as device_id for the corresponding bus (required)
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* <sda> GPIO pin ID to used for SDA (required)
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* <scl> GPIO pin ID to used for SCL (required)
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* <udelay> signal toggle delay.
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* <timeout> clock stretching timeout.
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* <sda_od> SDA is configured as open drain.
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* <scl_od> SCL is configured as open drain.
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* <scl_oo> SCL output drivers cannot be turned off.
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*
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* See include/i2c-gpio.h for more information about the parameters.
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*
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* If this driver is built into the kernel, you can use the following kernel
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* command line parameters, with the same values as the corresponding module
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* parameters listed above:
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*
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* i2c-gpio-custom.bus0
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* i2c-gpio-custom.bus1
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* i2c-gpio-custom.bus2
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* i2c-gpio-custom.bus3
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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#include <linux/gpio/machine.h>
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#include <asm-generic/gpio.h>
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0)
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#include <linux/i2c-gpio.h>
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#else
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#include <linux/platform_data/i2c-gpio.h>
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#endif
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#define DRV_NAME "i2c-gpio-custom"
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#define DRV_DESC "Custom GPIO-based I2C driver"
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#define DRV_VERSION "0.1.1"
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#define PFX DRV_NAME ": "
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#define BUS_PARAM_ID 0
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#define BUS_PARAM_SDA 1
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#define BUS_PARAM_SCL 2
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#define BUS_PARAM_UDELAY 3
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#define BUS_PARAM_TIMEOUT 4
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#define BUS_PARAM_SDA_OD 5
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#define BUS_PARAM_SCL_OD 6
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#define BUS_PARAM_SCL_OO 7
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#define BUS_PARAM_REQUIRED 3
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#define BUS_PARAM_COUNT 8
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#define BUS_COUNT_MAX 4
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static unsigned int bus0[BUS_PARAM_COUNT] __initdata;
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static unsigned int bus1[BUS_PARAM_COUNT] __initdata;
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static unsigned int bus2[BUS_PARAM_COUNT] __initdata;
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static unsigned int bus3[BUS_PARAM_COUNT] __initdata;
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static unsigned int bus_nump[BUS_COUNT_MAX] __initdata;
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#define BUS_PARM_DESC \
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" config -> id,sda,scl[,udelay,timeout,sda_od,scl_od,scl_oo]"
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module_param_array(bus0, uint, &bus_nump[0], 0);
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MODULE_PARM_DESC(bus0, "bus0" BUS_PARM_DESC);
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module_param_array(bus1, uint, &bus_nump[1], 0);
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MODULE_PARM_DESC(bus1, "bus1" BUS_PARM_DESC);
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module_param_array(bus2, uint, &bus_nump[2], 0);
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MODULE_PARM_DESC(bus2, "bus2" BUS_PARM_DESC);
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module_param_array(bus3, uint, &bus_nump[3], 0);
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MODULE_PARM_DESC(bus3, "bus3" BUS_PARM_DESC);
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static struct platform_device *devices[BUS_COUNT_MAX];
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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#define BUS_NAME_MAX 32
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#define GPIOD_TABLE_TEMPLATE {.dev_id=NULL, .table={GPIO_LOOKUP(NULL, 0, "sda", GPIO_OPEN_DRAIN), GPIO_LOOKUP(NULL, 0, "scl", GPIO_OPEN_DRAIN), {}}}
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static struct gpiod_lookup_table gpiod_table_0=GPIOD_TABLE_TEMPLATE;
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static struct gpiod_lookup_table gpiod_table_1=GPIOD_TABLE_TEMPLATE;
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static struct gpiod_lookup_table gpiod_table_2=GPIOD_TABLE_TEMPLATE;
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static struct gpiod_lookup_table gpiod_table_3=GPIOD_TABLE_TEMPLATE;
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#undef GPIOD_TABLE_TEMPLATE
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static struct gpiod_lookup_table *gpiod_tables[BUS_COUNT_MAX]={
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&gpiod_table_0,
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&gpiod_table_1,
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&gpiod_table_2,
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&gpiod_table_3
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};
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#endif
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static unsigned int nr_devices;
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static void i2c_gpio_custom_cleanup(void)
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{
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int i;
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for (i = 0; i < nr_devices; i++)
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if (devices[i]) {
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platform_device_del(devices[i]);
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platform_device_put(devices[i]);
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}
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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for (i = 0; i < nr_devices; i++) {
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gpiod_remove_lookup_table(gpiod_tables[i]);
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kfree(gpiod_tables[i]->dev_id);
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}
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#endif
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}
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static int __init i2c_gpio_custom_add_one(unsigned int id, unsigned int *params)
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{
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struct platform_device *pdev;
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struct i2c_gpio_platform_data pdata;
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int err;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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struct gpiod_lookup_table *gpiod_table;
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struct gpio_chip *chip_sda, *chip_scl;
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char* dev_id;
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#endif
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if (!bus_nump[id])
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return 0;
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if (bus_nump[id] < BUS_PARAM_REQUIRED) {
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printk(KERN_ERR PFX "not enough parameters for bus%d\n", id);
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err = -EINVAL;
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goto err;
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}
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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gpiod_table = gpiod_tables[id];
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chip_sda = gpio_to_chip(params[BUS_PARAM_SDA]);
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if (!chip_sda) {
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printk(KERN_ERR PFX "nonexistent GPIO %d for bus%d SDA\n", params[BUS_PARAM_SDA], id);
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err = -EINVAL;
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goto err;
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}
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gpiod_table->table[0].chip_label = chip_sda->label;
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gpiod_table->table[0].chip_hwnum = params[BUS_PARAM_SDA] - chip_sda->base;
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chip_scl = gpio_to_chip(params[BUS_PARAM_SCL]);
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if (!chip_scl) {
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printk(KERN_ERR PFX "nonexistent GPIO %d for bus%d SCL\n", params[BUS_PARAM_SCL], id);
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err = -EINVAL;
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goto err;
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}
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gpiod_table->table[1].chip_label = chip_scl->label;
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gpiod_table->table[1].chip_hwnum = params[BUS_PARAM_SCL] - chip_scl->base;
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dev_id = kmalloc(BUS_NAME_MAX+1, GFP_KERNEL);
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if (snprintf(dev_id, BUS_NAME_MAX+1, "i2c-gpio.%d", params[BUS_PARAM_ID]) >= BUS_NAME_MAX+1) {
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printk(KERN_ERR PFX "bus id %d too large\n", id);
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err = -EINVAL;
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goto err_free;
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}
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gpiod_table->dev_id = dev_id;
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gpiod_add_lookup_table(gpiod_table);
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#endif
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pdev = platform_device_alloc("i2c-gpio", params[BUS_PARAM_ID]);
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if (!pdev) {
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err = -ENOMEM;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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goto err_remove;
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#else
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goto err;
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#endif
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}
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
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pdata.sda_pin = params[BUS_PARAM_SDA];
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pdata.scl_pin = params[BUS_PARAM_SCL];
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#endif
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pdata.udelay = params[BUS_PARAM_UDELAY];
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pdata.timeout = params[BUS_PARAM_TIMEOUT];
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pdata.sda_is_open_drain = params[BUS_PARAM_SDA_OD] != 0;
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pdata.scl_is_open_drain = params[BUS_PARAM_SCL_OD] != 0;
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pdata.scl_is_output_only = params[BUS_PARAM_SCL_OO] != 0;
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err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
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if (err)
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goto err_put;
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err = platform_device_add(pdev);
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if (err)
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goto err_put;
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devices[nr_devices++] = pdev;
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return 0;
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err_put:
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platform_device_put(pdev);
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
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err_remove:
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gpiod_remove_lookup_table(gpiod_table);
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err_free:
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kfree(dev_id);
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#endif
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err:
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return err;
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}
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static int __init i2c_gpio_custom_probe(void)
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{
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int err;
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printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
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err = i2c_gpio_custom_add_one(0, bus0);
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if (err)
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goto err;
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err = i2c_gpio_custom_add_one(1, bus1);
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if (err)
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goto err;
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err = i2c_gpio_custom_add_one(2, bus2);
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if (err)
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goto err;
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err = i2c_gpio_custom_add_one(3, bus3);
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if (err)
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goto err;
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if (!nr_devices) {
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printk(KERN_ERR PFX "no bus parameter(s) specified\n");
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err = -ENODEV;
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goto err;
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}
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return 0;
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err:
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i2c_gpio_custom_cleanup();
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return err;
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}
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#ifdef MODULE
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static int __init i2c_gpio_custom_init(void)
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{
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return i2c_gpio_custom_probe();
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}
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module_init(i2c_gpio_custom_init);
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static void __exit i2c_gpio_custom_exit(void)
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{
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i2c_gpio_custom_cleanup();
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}
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module_exit(i2c_gpio_custom_exit);
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#else
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subsys_initcall(i2c_gpio_custom_probe);
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#endif /* MODULE*/
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org >");
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MODULE_DESCRIPTION(DRV_DESC);
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MODULE_VERSION(DRV_VERSION);
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@ -12,6 +12,7 @@ source "$BR2_EXTERNAL_INGENIC_PATH/package/demo-openipc/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/fdk-aac-openipc/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/ffmpeg-openipc/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/fwprintenv-openipc/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/i2c-gpio-custom/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/i2c-telemetry/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/ipctool/Config.in"
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source "$BR2_EXTERNAL_INGENIC_PATH/package/json-c-openipc/Config.in"
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@ -119,6 +119,7 @@ BR2_PACKAGE_COMGT=y
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BR2_PACKAGE_DEMO_OPENIPC=y
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BR2_PACKAGE_DBELL_INA219=y
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BR2_PACKAGE_JSONFILTER=y
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BR2_PACKAGE_I2C_GPIO_CUSTOM=y
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# DEBUG
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BR2_PACKAGE_HOST_GDB=y
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@ -0,0 +1 @@
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../../general/package/i2c-gpio-custom
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