Implement prcm_module_enable and prcm_module_disable for the AM335x.
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riastradh
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d2477942b2
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/* $NetBSD: am335x_prcm.c,v 1.1 2012/12/11 18:53:26 riastradh Exp $ */
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/*
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* TI OMAP Power, Reset, and Clock Management on the AM335x
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*/
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: am335x_prcm.c,v 1.1 2012/12/11 18:53:26 riastradh Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <arm/omap/am335x_prcm.h>
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#include <arm/omap/omap2_prcm.h>
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#define AM335X_CLKCTRL_MODULEMODE_MASK __BITS(0, 1)
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#define AM335X_CLKCTRL_MODULEMODE_DISABLED 0
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#define AM335X_CLKCTRL_MODULEMODE_ENABLE 2
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static void
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am335x_prcm_check_clkctrl(bus_size_t cm_module,
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bus_size_t clkctrl_reg, uint32_t v)
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{
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#ifdef DIAGNOSTIC
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uint32_t u = prcm_read_4(cm_module, clkctrl_reg);
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if (__SHIFTOUT(u, AM335X_CLKCTRL_MODULEMODE_MASK) !=
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__SHIFTOUT(v, AM335X_CLKCTRL_MODULEMODE_MASK))
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aprint_error("clkctrl didn't take: %"PRIx32" -/-> %"PRIx32"\n",
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u, v);
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#else
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(void)cm_module;
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(void)clkctrl_reg;
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(void)v;
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#endif
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}
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void
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prcm_module_enable(const struct omap_module *om)
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{
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bus_size_t cm_module = om->om_prcm_cm_module;
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bus_size_t clkctrl_reg = om->om_prcm_cm_clkctrl_reg;
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uint32_t clkctrl;
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clkctrl = prcm_read_4(cm_module, clkctrl_reg);
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clkctrl &=~ AM335X_CLKCTRL_MODULEMODE_MASK;
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clkctrl |= __SHIFTIN(AM335X_CLKCTRL_MODULEMODE_ENABLE,
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AM335X_CLKCTRL_MODULEMODE_MASK);
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prcm_write_4(cm_module, clkctrl_reg, clkctrl);
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am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
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}
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void
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prcm_module_disable(const struct omap_module *om)
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{
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bus_size_t cm_module = om->om_prcm_cm_module;
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bus_size_t clkctrl_reg = om->om_prcm_cm_clkctrl_reg;
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uint32_t clkctrl;
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clkctrl = prcm_read_4(cm_module, clkctrl_reg);
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clkctrl &=~ AM335X_CLKCTRL_MODULEMODE_MASK;
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clkctrl |= __SHIFTIN(AM335X_CLKCTRL_MODULEMODE_DISABLED,
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AM335X_CLKCTRL_MODULEMODE_MASK);
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prcm_write_4(cm_module, clkctrl_reg, clkctrl);
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am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
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}
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@ -0,0 +1,64 @@
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/* $NetBSD: am335x_prcm.h,v 1.1 2012/12/11 18:53:26 riastradh Exp $ */
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/*
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* TI OMAP Power, Reset, and Clock Management on the AM335x
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*/
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN 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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*/
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#ifndef _ARM_OMAP_AM335X_PRCM_H_
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#define _ARM_OMAP_AM335X_PRCM_H_
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#include <sys/bus.h>
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struct omap_module {
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bus_size_t om_prcm_cm_module;
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bus_size_t om_prcm_cm_clkctrl_reg;
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};
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#define AM335X_PRCM_CM_PER 0x0000
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#define AM335X_PRCM_CM_WKUP 0x0400
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#define AM335X_PRCM_CM_DPLL 0x0500
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#define AM335X_PRCM_CM_MPU 0x0600
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#define AM335X_PRCM_CM_DEVICE 0x0700
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#define AM335X_PRCM_CM_RTC 0x0800
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#define AM335X_PRCM_CM_GFX 0x0900
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#define AM335X_PRCM_CM_CEFUSE 0x0a00
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#define AM335X_PRCM_PRM_IRQ 0x0b00
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#define AM335X_PRCM_PRM_PER 0x0c00
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#define AM335X_PRCM_PRM_WKUP 0x0d00
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#define AM335X_PRCM_PRM_MPU 0x0e00
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#define AM335X_PRCM_PRM_DEVICE 0x0f00
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#define AM335X_PRCM_PRM_RTC 0x1000
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#define AM335X_PRCM_PRM_GFX 0x1100
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#define AM335X_PRCM_PRM_CEFUSE 0x1200
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#endif /* _ARM_OMAP_AM335X_PRCM_H_ */
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