From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- .../roms/u-boot/board/LaCie/common/cpld-gpio-bus.c | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 qemu/roms/u-boot/board/LaCie/common/cpld-gpio-bus.c (limited to 'qemu/roms/u-boot/board/LaCie/common/cpld-gpio-bus.c') diff --git a/qemu/roms/u-boot/board/LaCie/common/cpld-gpio-bus.c b/qemu/roms/u-boot/board/LaCie/common/cpld-gpio-bus.c new file mode 100644 index 000000000..9b24dc535 --- /dev/null +++ b/qemu/roms/u-boot/board/LaCie/common/cpld-gpio-bus.c @@ -0,0 +1,47 @@ +/* + * cpld-gpio-bus.c: provides support for the CPLD GPIO bus found on some LaCie + * boards (as the 2Big/5Big Network v2 and the 2Big NAS). This parallel GPIO + * bus exposes two registers (address and data). Each of this register is made + * up of several dedicated GPIOs. An extra GPIO is used to notify the CPLD that + * the registers have been updated. + * + * Mostly this bus is used to configure the LEDs on LaCie boards. + * + * Copyright (C) 2013 Simon Guinot + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include "cpld-gpio-bus.h" + +static void cpld_gpio_bus_set_addr(struct cpld_gpio_bus *bus, unsigned addr) +{ + int pin; + + for (pin = 0; pin < bus->num_addr; pin++) + kw_gpio_set_value(bus->addr[pin], (addr >> pin) & 1); +} + +static void cpld_gpio_bus_set_data(struct cpld_gpio_bus *bus, unsigned data) +{ + int pin; + + for (pin = 0; pin < bus->num_data; pin++) + kw_gpio_set_value(bus->data[pin], (data >> pin) & 1); +} + +static void cpld_gpio_bus_enable_select(struct cpld_gpio_bus *bus) +{ + /* The transfer is enabled on the raising edge. */ + kw_gpio_set_value(bus->enable, 0); + kw_gpio_set_value(bus->enable, 1); +} + +void cpld_gpio_bus_write(struct cpld_gpio_bus *bus, + unsigned addr, unsigned value) +{ + cpld_gpio_bus_set_addr(bus, addr); + cpld_gpio_bus_set_data(bus, value); + cpld_gpio_bus_enable_select(bus); +} -- cgit 1.2.3-korg