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In OMAP3 Some modules like Smartreflex do not have the regular sysconfig register.Instead clockactivity bits are part of another register at a different bit position than the usual bit positions 8 and 9. In OMAP4, a new scheme is available due to the new protocol between the PRCM and the IPs. Depending of the scheme, the SYSCONFIG bitfields position will be different. The IP_REVISION register should be at offset 0x00. It should contain a SCHEME field. From this we can determine whether the IP follows legacy scheme or the new scheme. 31:30 SCHEME Used to distinguish between old scheme and current. Read 0x0: Legacy protocol. Read 0x1: New PRCM protocol defined for new OMAP4 IPs For legacy IP 13:12 MIDLEMODE 11:8 CLOCKACTIVITY 6 EMUSOFT 5 EMUFREE 4:3 SIDLEMODE 2 ENAWAKEUP 1 SOFTRESET 0 AUTOIDLE For new OMAP4 IP's, the bit position in SYSCONFIG is (for simple target): 5:4 STANDBYMODE (Ex MIDLEMODE) 3:2 IDLEMODE (Ex SIDLEMODE) 1 FREEEMU (Ex EMUFREE) 0 SOFTRESET Unfortunately In OMAP4 also some IPs will not follow any of these two schemes. This is the case at least for McASP, SmartReflex and some security IPs. This patch introduces a new field sysc_fields in omap_hwmod_sysconfig which can be used by the hwmod structures to specify the offsets for the sysconfig register of the IP.Also two static structures omap_hwmod_sysc_type1 and omap_hwmod_sysc_type2 are defined which can be used directly to populate the sysc_fields if the IP follows legacy or new OMAP4 scheme. If the IP follows none of these two schemes a new omap_hwmod_sysc_fields structure has to be defined and passed as part of omap_hwmod_sysconfig. Signed-off-by: Thara Gopinath <thara@ti.com> Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
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* omap_hwmod common data structures
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*
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* Copyright (C) 2010 Texas Instruments, Inc.
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* Thara Gopinath <thara@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This data/structures are to be used while defining OMAP on-chip module
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* data and their integration with other OMAP modules and Linux.
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*/
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#include <plat/omap_hwmod.h>
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/**
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* struct omap_hwmod_sysc_type1 - TYPE1 sysconfig scheme.
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*
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* To be used by hwmod structure to specify the sysconfig offsets
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* if the device ip is compliant with the original PRCM protocol
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* defined for OMAP2420.
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*/
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struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1 = {
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.midle_shift = SYSC_TYPE1_MIDLEMODE_SHIFT,
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.clkact_shift = SYSC_TYPE1_CLOCKACTIVITY_SHIFT,
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.sidle_shift = SYSC_TYPE1_SIDLEMODE_SHIFT,
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.enwkup_shift = SYSC_TYPE1_ENAWAKEUP_SHIFT,
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.srst_shift = SYSC_TYPE1_SOFTRESET_SHIFT,
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.autoidle_shift = SYSC_TYPE1_AUTOIDLE_SHIFT,
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};
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/**
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* struct omap_hwmod_sysc_type2 - TYPE2 sysconfig scheme.
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*
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* To be used by hwmod structure to specify the sysconfig offsets if the
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* device ip is compliant with the new PRCM protocol defined for new
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* OMAP4 IPs.
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*/
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struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2 = {
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.midle_shift = SYSC_TYPE2_MIDLEMODE_SHIFT,
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.sidle_shift = SYSC_TYPE2_SIDLEMODE_SHIFT,
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.srst_shift = SYSC_TYPE2_SOFTRESET_SHIFT,
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};
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