arch: k210: Set CPU clock based on PLL0 settings
This commit is contained in:
Masayuki Ishikawa
Brennan Ashton
parent
6906853f8e
commit
4ca19e7e74
@ -1,32 +1,24 @@
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/****************************************************************************
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* arch/risc-v/src/k210/hardware/k210_memorymap.h
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*
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* Copyright (C) 2019 Masayuki Ishikawa. All rights reserved.
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* Author: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
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* Derives from software originally provided by Canaan Inc
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* Copyright 2018 Canaan Inc
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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@ -49,4 +41,6 @@
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#endif
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#define K210_GPIO_BASE 0x38001000
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#define K210_SYSCTL_BASE 0x50440000
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#endif /* __ARCH_RISCV_SRC_K210_HARDWARE_K210_MEMORYMAP_H */
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48
arch/risc-v/src/k210/hardware/k210_sysctl.h
Normal file
48
arch/risc-v/src/k210/hardware/k210_sysctl.h
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@ -0,0 +1,48 @@
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/****************************************************************************
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* arch/risc-v/src/k210/hardware/k210_sysctl.h
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*
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* Derives from software originally provided by Canaan Inc
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*
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* Copyright 2018 Canaan Inc
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_RISCV_SRC_K210_HARDWARE_K210_SYSCTL_H
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#define __ARCH_RISCV_SRC_K210_HARDWARE_K210_SYSCTL_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define K210_SYSCTL_PLL0 (K210_SYSCTL_BASE + 0x08)
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#define PLL_CLK_R(n) (n & 0x00000f)
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#define PLL_CLK_F(n) ((n & 0x0003f0) >> 4)
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#define PLL_CLK_OD(n) ((n & 0x003c00) >> 10)
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#define K210_SYSCTL_CLKSEL0 (K210_SYSCTL_BASE + 0x20)
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#define CLKSEL0_ACLK_SEL(n) (n & 0x00000001)
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#endif /* __ARCH_RISCV_SRC_K210_HARDWARE_K210_SYSCTL_H */
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@ -1,35 +1,24 @@
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/****************************************************************************
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* arch/risc-v/src/k210/k210_clockconfig.c
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*
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* Copyright (C) 2019 Masayuki Ishikawa. All rights reserved.
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* Author: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
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* Derives from software originally provided by Canaan Inc
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* Copyright 2018 Canaan Inc
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
|
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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, WITHOUT
|
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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@ -53,6 +42,14 @@
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* Pre-processor Definitions
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****************************************************************************/
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#define OSC_FREQ 26000000
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static uint32_t g_cpu_clock = 416000000;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@ -63,14 +60,54 @@
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uint32_t k210_get_cpuclk(void)
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{
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return 416000000; /* TODO */
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return g_cpu_clock;
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}
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/****************************************************************************
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* Name: k210_get_pll0clk
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****************************************************************************/
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#ifndef CONFIG_K210_WITH_QEMU
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uint32_t k210_get_pll0clk(void)
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{
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uint32_t pll0;
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uint32_t nr;
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uint32_t nf;
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uint32_t od;
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pll0 = getreg32(K210_SYSCTL_PLL0);
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nr = PLL_CLK_R(pll0) + 1;
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nf = PLL_CLK_F(pll0) + 1;
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od = PLL_CLK_OD(pll0) + 1;
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return OSC_FREQ / nr * nf / od;
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}
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#endif
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/****************************************************************************
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* Name: k210_clockconfig
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****************************************************************************/
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void k210_clockconfig(void)
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{
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/* TODO */
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#ifndef CONFIG_K210_WITH_QEMU
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uint32_t clksel0;
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/* Obtain clock selector for ACLK */
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clksel0 = getreg32(K210_SYSCTL_CLKSEL0);
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if (1 == CLKSEL0_ACLK_SEL(clksel0))
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{
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/* PLL0 selected */
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g_cpu_clock = k210_get_pll0clk() / 2;
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}
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else
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{
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/* OSC selected */
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g_cpu_clock = OSC_FREQ;
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}
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#endif
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}
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@ -65,10 +65,11 @@ extern "C"
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#endif
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/****************************************************************************
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* Public Functions
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* Public Function Prototypes
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****************************************************************************/
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EXTERN uint32_t k210_get_cpuclk(void);
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EXTERN uint32_t k210_get_pll0clk(void);
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EXTERN void k210_clockconfig(void);
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#if defined(__cplusplus)
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@ -41,6 +41,7 @@
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#include "hardware/k210_uart.h"
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#include "hardware/k210_clint.h"
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#include "hardware/k210_plic.h"
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#include "hardware/k210_sysctl.h"
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/****************************************************************************
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* Pre-processor Definitions
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