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/**
* \file
*
* \brief Chip-specific generic clock management.
*
* Copyright (c) 2011-2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="https://www.atmel.com/design-support/">Atmel Support</a>
*/
#ifndef CHIP_GENCLK_H_INCLUDED
#define CHIP_GENCLK_H_INCLUDED
#include <osc.h>
#include <pll.h>
/// @cond 0
/**INDENT-OFF**/
#ifdef __cplusplus
extern "C" {
#endif
/**INDENT-ON**/
/// @endcond
/**
* \weakgroup genclk_group
* @{
*/
//! \name Programmable Clock Identifiers (PCK)
//@{
#define GENCLK_PCK_0 0 //!< PCK0 ID
#define GENCLK_PCK_1 1 //!< PCK1 ID
#define GENCLK_PCK_2 2 //!< PCK2 ID
//@}
//! \name Programmable Clock Sources (PCK)
//@{
enum genclk_source {
GENCLK_PCK_SRC_SLCK_RC = 0, //!< Internal 32kHz RC oscillator as PCK source clock
GENCLK_PCK_SRC_SLCK_XTAL = 1, //!< External 32kHz crystal oscillator as PCK source clock
GENCLK_PCK_SRC_SLCK_BYPASS = 2, //!< External 32kHz bypass oscillator as PCK source clock
GENCLK_PCK_SRC_MAINCK_4M_RC = 3, //!< Internal 4MHz RC oscillator as PCK source clock
GENCLK_PCK_SRC_MAINCK_8M_RC = 4, //!< Internal 8MHz RC oscillator as PCK source clock
GENCLK_PCK_SRC_MAINCK_12M_RC = 5, //!< Internal 12MHz RC oscillator as PCK source clock
GENCLK_PCK_SRC_MAINCK_XTAL = 6, //!< External crystal oscillator as PCK source clock
GENCLK_PCK_SRC_MAINCK_BYPASS = 7, //!< External bypass oscillator as PCK source clock
GENCLK_PCK_SRC_PLLACK = 8, //!< Use PLLACK as PCK source clock
GENCLK_PCK_SRC_PLLBCK = 9, //!< Use PLLBCK as PCK source clock
GENCLK_PCK_SRC_MCK = 10, //!< Use Master Clk as PCK source clock
};
//@}
//! \name Programmable Clock Prescalers (PCK)
//@{
enum genclk_divider {
GENCLK_PCK_PRES_1 = PMC_PCK_PRES_CLK_1, //!< Set PCK clock prescaler to 1
GENCLK_PCK_PRES_2 = PMC_PCK_PRES_CLK_2, //!< Set PCK clock prescaler to 2
GENCLK_PCK_PRES_4 = PMC_PCK_PRES_CLK_4, //!< Set PCK clock prescaler to 4
GENCLK_PCK_PRES_8 = PMC_PCK_PRES_CLK_8, //!< Set PCK clock prescaler to 8
GENCLK_PCK_PRES_16 = PMC_PCK_PRES_CLK_16, //!< Set PCK clock prescaler to 16
GENCLK_PCK_PRES_32 = PMC_PCK_PRES_CLK_32, //!< Set PCK clock prescaler to 32
GENCLK_PCK_PRES_64 = PMC_PCK_PRES_CLK_64, //!< Set PCK clock prescaler to 64
};
//@}
struct genclk_config {
uint32_t ctrl;
};
static inline void genclk_config_defaults(struct genclk_config *p_cfg,
uint32_t ul_id)
{
ul_id = ul_id;
p_cfg->ctrl = 0;
}
static inline void genclk_config_read(struct genclk_config *p_cfg,
uint32_t ul_id)
{
p_cfg->ctrl = PMC->PMC_PCK[ul_id];
}
static inline void genclk_config_write(const struct genclk_config *p_cfg,
uint32_t ul_id)
{
PMC->PMC_PCK[ul_id] = p_cfg->ctrl;
}
//! \name Programmable Clock Source and Prescaler configuration
//@{
static inline void genclk_config_set_source(struct genclk_config *p_cfg,
enum genclk_source e_src)
{
p_cfg->ctrl &= (~PMC_PCK_CSS_Msk);
switch (e_src) {
case GENCLK_PCK_SRC_SLCK_RC:
case GENCLK_PCK_SRC_SLCK_XTAL:
case GENCLK_PCK_SRC_SLCK_BYPASS:
p_cfg->ctrl |= (PMC_PCK_CSS_SLOW_CLK);
break;
case GENCLK_PCK_SRC_MAINCK_4M_RC:
case GENCLK_PCK_SRC_MAINCK_8M_RC:
case GENCLK_PCK_SRC_MAINCK_12M_RC:
case GENCLK_PCK_SRC_MAINCK_XTAL:
case GENCLK_PCK_SRC_MAINCK_BYPASS:
p_cfg->ctrl |= (PMC_PCK_CSS_MAIN_CLK);
break;
case GENCLK_PCK_SRC_PLLACK:
p_cfg->ctrl |= (PMC_PCK_CSS_PLLA_CLK);
break;
case GENCLK_PCK_SRC_PLLBCK:
p_cfg->ctrl |= (PMC_PCK_CSS_UPLL_CLK);
break;
case GENCLK_PCK_SRC_MCK:
p_cfg->ctrl |= (PMC_PCK_CSS_MCK);
break;
}
}
static inline void genclk_config_set_divider(struct genclk_config *p_cfg,
uint32_t e_divider)
{
p_cfg->ctrl &= ~PMC_PCK_PRES_Msk;
p_cfg->ctrl |= e_divider;
}
//@}
static inline void genclk_enable(const struct genclk_config *p_cfg,
uint32_t ul_id)
{
PMC->PMC_PCK[ul_id] = p_cfg->ctrl;
pmc_enable_pck(ul_id);
}
static inline void genclk_disable(uint32_t ul_id)
{
pmc_disable_pck(ul_id);
}
static inline void genclk_enable_source(enum genclk_source e_src)
{
switch (e_src) {
case GENCLK_PCK_SRC_SLCK_RC:
if (!osc_is_ready(OSC_SLCK_32K_RC)) {
osc_enable(OSC_SLCK_32K_RC);
osc_wait_ready(OSC_SLCK_32K_RC);
}
break;
case GENCLK_PCK_SRC_SLCK_XTAL:
if (!osc_is_ready(OSC_SLCK_32K_XTAL)) {
osc_enable(OSC_SLCK_32K_XTAL);
osc_wait_ready(OSC_SLCK_32K_XTAL);
}
break;
case GENCLK_PCK_SRC_SLCK_BYPASS:
if (!osc_is_ready(OSC_SLCK_32K_BYPASS)) {
osc_enable(OSC_SLCK_32K_BYPASS);
osc_wait_ready(OSC_SLCK_32K_BYPASS);
}
break;
case GENCLK_PCK_SRC_MAINCK_4M_RC:
if (!osc_is_ready(OSC_MAINCK_4M_RC)) {
osc_enable(OSC_MAINCK_4M_RC);
osc_wait_ready(OSC_MAINCK_4M_RC);
}
break;
case GENCLK_PCK_SRC_MAINCK_8M_RC:
if (!osc_is_ready(OSC_MAINCK_8M_RC)) {
osc_enable(OSC_MAINCK_8M_RC);
osc_wait_ready(OSC_MAINCK_8M_RC);
}
break;
case GENCLK_PCK_SRC_MAINCK_12M_RC:
if (!osc_is_ready(OSC_MAINCK_12M_RC)) {
osc_enable(OSC_MAINCK_12M_RC);
osc_wait_ready(OSC_MAINCK_12M_RC);
}
break;
case GENCLK_PCK_SRC_MAINCK_XTAL:
if (!osc_is_ready(OSC_MAINCK_XTAL)) {
osc_enable(OSC_MAINCK_XTAL);
osc_wait_ready(OSC_MAINCK_XTAL);
}
break;
case GENCLK_PCK_SRC_MAINCK_BYPASS:
if (!osc_is_ready(OSC_MAINCK_BYPASS)) {
osc_enable(OSC_MAINCK_BYPASS);
osc_wait_ready(OSC_MAINCK_BYPASS);
}
break;
#ifdef CONFIG_PLL0_SOURCE
case GENCLK_PCK_SRC_PLLACK:
pll_enable_config_defaults(0);
break;
#endif
#ifdef CONFIG_PLL1_SOURCE
case GENCLK_PCK_SRC_PLLBCK:
pll_enable_config_defaults(1);
break;
#endif
case GENCLK_PCK_SRC_MCK:
break;
default:
Assert(false);
break;
}
}
//! @}
/// @cond 0
/**INDENT-OFF**/
#ifdef __cplusplus
}
#endif
/**INDENT-ON**/
/// @endcond
#endif /* CHIP_GENCLK_H_INCLUDED */
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