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Implement prcm_module_enable and prcm_module_disable for the AM335x.

This commit is contained in:
riastradh 2012-12-11 18:53:26 +00:00
parent d2477942b2
commit f19b5fc52e
2 changed files with 159 additions and 0 deletions
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95
sys/arch/arm/omap/am335x_prcm.c Normal file
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/* $NetBSD: am335x_prcm.c,v 1.1 2012/12/11 18:53:26 riastradh Exp $ */
/*
* TI OMAP Power, Reset, and Clock Management on the AM335x
*/
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: am335x_prcm.c,v 1.1 2012/12/11 18:53:26 riastradh Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <arm/omap/am335x_prcm.h>
#include <arm/omap/omap2_prcm.h>
#define AM335X_CLKCTRL_MODULEMODE_MASK __BITS(0, 1)
#define AM335X_CLKCTRL_MODULEMODE_DISABLED 0
#define AM335X_CLKCTRL_MODULEMODE_ENABLE 2
static void
am335x_prcm_check_clkctrl(bus_size_t cm_module,
bus_size_t clkctrl_reg, uint32_t v)
{
#ifdef DIAGNOSTIC
uint32_t u = prcm_read_4(cm_module, clkctrl_reg);
if (__SHIFTOUT(u, AM335X_CLKCTRL_MODULEMODE_MASK) !=
__SHIFTOUT(v, AM335X_CLKCTRL_MODULEMODE_MASK))
aprint_error("clkctrl didn't take: %"PRIx32" -/-> %"PRIx32"\n",
u, v);
#else
(void)cm_module;
(void)clkctrl_reg;
(void)v;
#endif
}
void
prcm_module_enable(const struct omap_module *om)
{
bus_size_t cm_module = om->om_prcm_cm_module;
bus_size_t clkctrl_reg = om->om_prcm_cm_clkctrl_reg;
uint32_t clkctrl;
clkctrl = prcm_read_4(cm_module, clkctrl_reg);
clkctrl &=~ AM335X_CLKCTRL_MODULEMODE_MASK;
clkctrl |= __SHIFTIN(AM335X_CLKCTRL_MODULEMODE_ENABLE,
AM335X_CLKCTRL_MODULEMODE_MASK);
prcm_write_4(cm_module, clkctrl_reg, clkctrl);
am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
}
void
prcm_module_disable(const struct omap_module *om)
{
bus_size_t cm_module = om->om_prcm_cm_module;
bus_size_t clkctrl_reg = om->om_prcm_cm_clkctrl_reg;
uint32_t clkctrl;
clkctrl = prcm_read_4(cm_module, clkctrl_reg);
clkctrl &=~ AM335X_CLKCTRL_MODULEMODE_MASK;
clkctrl |= __SHIFTIN(AM335X_CLKCTRL_MODULEMODE_DISABLED,
AM335X_CLKCTRL_MODULEMODE_MASK);
prcm_write_4(cm_module, clkctrl_reg, clkctrl);
am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
}

64
sys/arch/arm/omap/am335x_prcm.h Normal file
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/* $NetBSD: am335x_prcm.h,v 1.1 2012/12/11 18:53:26 riastradh Exp $ */
/*
* TI OMAP Power, Reset, and Clock Management on the AM335x
*/
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
#ifndef _ARM_OMAP_AM335X_PRCM_H_
#define _ARM_OMAP_AM335X_PRCM_H_
#include <sys/bus.h>
struct omap_module {
bus_size_t om_prcm_cm_module;
bus_size_t om_prcm_cm_clkctrl_reg;
};
#define AM335X_PRCM_CM_PER 0x0000
#define AM335X_PRCM_CM_WKUP 0x0400
#define AM335X_PRCM_CM_DPLL 0x0500
#define AM335X_PRCM_CM_MPU 0x0600
#define AM335X_PRCM_CM_DEVICE 0x0700
#define AM335X_PRCM_CM_RTC 0x0800
#define AM335X_PRCM_CM_GFX 0x0900
#define AM335X_PRCM_CM_CEFUSE 0x0a00
#define AM335X_PRCM_PRM_IRQ 0x0b00
#define AM335X_PRCM_PRM_PER 0x0c00
#define AM335X_PRCM_PRM_WKUP 0x0d00
#define AM335X_PRCM_PRM_MPU 0x0e00
#define AM335X_PRCM_PRM_DEVICE 0x0f00
#define AM335X_PRCM_PRM_RTC 0x1000
#define AM335X_PRCM_PRM_GFX 0x1100
#define AM335X_PRCM_PRM_CEFUSE 0x1200
#endif /* _ARM_OMAP_AM335X_PRCM_H_ */