139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/* quark_se_clock_control.c - Clock controller driver for Quark SE */
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/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <arch/cpu.h>
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#include <misc/__assert.h>
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#include <board.h>
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#include <device.h>
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#include <init.h>
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#include <sys_io.h>
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#include <clock_control.h>
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#include <clock_control/quark_se_clock_control.h>
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#ifndef CONFIG_CLOCK_DEBUG
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#define DBG(...) {; }
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#else
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#if defined(CONFIG_STDOUT_CONSOLE)
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#include <stdio.h>
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#define DBG printf
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#else
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#include <misc/printk.h>
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#define DBG printk
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#endif /* CONFIG_STDOUT_CONSOLE */
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#endif /* CONFIG_CLOCK_DEBUG */
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struct quark_se_clock_control_config {
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uint32_t base_address;
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};
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static inline int quark_se_clock_control_on(struct device *dev,
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clock_control_subsys_t sub_system)
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{
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struct quark_se_clock_control_config *info = dev->config->config_info;
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uint32_t subsys = POINTER_TO_INT(sub_system);
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if (sub_system == CLOCK_CONTROL_SUBSYS_ALL) {
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DBG("Enabling all clock gates on dev %p\n", dev);
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sys_write32(0xffffffff, info->base_address);
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return DEV_OK;
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}
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DBG("Enabling clock gate on dev %p subsystem %u\n", dev, subsys);
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return sys_test_and_set_bit(info->base_address, subsys);
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}
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static inline int quark_se_clock_control_off(struct device *dev,
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clock_control_subsys_t sub_system)
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{
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struct quark_se_clock_control_config *info = dev->config->config_info;
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uint32_t subsys = POINTER_TO_INT(sub_system);
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if (sub_system == CLOCK_CONTROL_SUBSYS_ALL) {
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DBG("Disabling all clock gates on dev %p\n", dev);
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sys_write32(0x00000000, info->base_address);
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return DEV_OK;
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}
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DBG("clock gate on dev %p subsystem %u\n", dev, subsys);
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return sys_test_and_clear_bit(info->base_address, subsys);
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}
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static struct clock_control_driver_api quark_se_clock_control_api = {
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.on = quark_se_clock_control_on,
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.off = quark_se_clock_control_off
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};
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int quark_se_clock_control_init(struct device *dev)
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{
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dev->driver_api = &quark_se_clock_control_api;
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DBG("Quark Se clock controller driver initialized on device: %p\n",
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dev);
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return DEV_OK;
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}
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#ifdef CONFIG_CLOCK_CONTROL_QUARK_SE_PERIPHERAL
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struct quark_se_clock_control_config clock_quark_se_peripheral_config = {
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.base_address = CLOCK_PERIPHERAL_BASE_ADDR
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};
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DECLARE_DEVICE_INIT_CONFIG(clock_quark_se_peripheral,
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CONFIG_CLOCK_CONTROL_QUARK_SE_PERIPHERAL_DRV_NAME,
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&quark_se_clock_control_init,
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&clock_quark_se_peripheral_config);
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pre_kernel_early_init(clock_quark_se_peripheral, NULL);
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#endif /* CONFIG_CLOCK_CONTROL_QUARK_SE_PERIPHERAL */
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#ifdef CONFIG_CLOCK_CONTROL_QUARK_SE_EXTERNAL
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struct quark_se_clock_control_config clock_quark_se_external_config = {
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.base_address = CLOCK_EXTERNAL_BASE_ADDR
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};
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DECLARE_DEVICE_INIT_CONFIG(clock_quark_se_external,
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CONFIG_CLOCK_CONTROL_QUARK_SE_EXTERNAL_DRV_NAME,
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&quark_se_clock_control_init,
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&clock_quark_se_external_config);
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pre_kernel_early_init(clock_quark_se_external, NULL);
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#endif /* CONFIG_CLOCK_CONTROL_QUARK_SE_EXTERNAL */
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#ifdef CONFIG_CLOCK_CONTROL_QUARK_SE_SENSOR
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struct quark_se_clock_control_config clock_quark_se_sensor_config = {
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.base_address = CLOCK_SENSOR_BASE_ADDR
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};
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DECLARE_DEVICE_INIT_CONFIG(clock_quark_se_sensor,
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CONFIG_CLOCK_CONTROL_QUARK_SE_SENSOR_DRV_NAME,
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&quark_se_clock_control_init,
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&clock_quark_se_sensor_config);
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pre_kernel_early_init(clock_quark_se_sensor, NULL);
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#endif /* CONFIG_CLOCK_CONTROL_QUARK_SE_SENSOR */
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