Add reset framework, a second part of new 'extended resources' family of
support frameworks (i.e. regulators/phy/tsensors/fuses...). It provides simple unified consumers interface for manipulations with on-chip resets. Reviewed by: ian, imp (paritaly)
This commit is contained in:
mmel
parent
d975ccbb1b
commit
00b7f0b570
@ -1417,6 +1417,8 @@ dev/extres/clk/clk_div.c optional ext_resources clk
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dev/extres/clk/clk_fixed.c optional ext_resources clk
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dev/extres/clk/clk_fixed.c optional ext_resources clk
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dev/extres/clk/clk_gate.c optional ext_resources clk
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dev/extres/clk/clk_gate.c optional ext_resources clk
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dev/extres/clk/clk_mux.c optional ext_resources clk
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dev/extres/clk/clk_mux.c optional ext_resources clk
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dev/extres/hwreset/hwreset.c optional ext_resources hwreset
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dev/extres/hwreset/hwreset_if.m optional ext_resources hwreset
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dev/fatm/if_fatm.c optional fatm pci
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dev/fatm/if_fatm.c optional fatm pci
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dev/fb/fbd.c optional fbd | vt
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dev/fb/fbd.c optional fbd | vt
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dev/fb/fb_if.m standard
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dev/fb/fb_if.m standard
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186
sys/dev/extres/hwreset/hwreset.c
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186
sys/dev/extres/hwreset/hwreset.c
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/*-
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* Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_platform.h"
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/kobj.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#ifdef FDT
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#endif
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#include <dev/extres/hwreset/hwreset.h>
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#include "hwreset_if.h"
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struct hwreset {
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device_t consumer_dev; /* consumer device*/
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device_t provider_dev; /* provider device*/
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int rst_id; /* reset id */
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};
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MALLOC_DEFINE(M_HWRESET, "hwreset", "Reset framework");
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int
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hwreset_assert(hwreset_t rst)
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{
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return (HWRESET_ASSERT(rst->provider_dev, rst->rst_id, true));
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}
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int
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hwreset_deassert(hwreset_t rst)
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{
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return (HWRESET_ASSERT(rst->provider_dev, rst->rst_id, false));
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}
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int
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hwreset_is_asserted(hwreset_t rst, bool *value)
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{
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return (HWRESET_IS_ASSERTED(rst->provider_dev, rst->rst_id, value));
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}
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void
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hwreset_release(hwreset_t rst)
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{
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free(rst, M_HWRESET);
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}
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int
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hwreset_get_by_id(device_t consumer_dev, device_t provider_dev, intptr_t id,
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hwreset_t *rst_out)
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{
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hwreset_t rst;
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/* Create handle */
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rst = malloc(sizeof(struct hwreset), M_HWRESET,
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M_WAITOK | M_ZERO);
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rst->consumer_dev = consumer_dev;
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rst->provider_dev = provider_dev;
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rst->rst_id = id;
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*rst_out = rst;
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return (0);
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}
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#ifdef FDT
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int
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hwreset_default_ofw_map(device_t provider_dev, phandle_t xref, int ncells,
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pcell_t *cells, intptr_t *id)
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{
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if (ncells == 0)
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*id = 1;
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else if (ncells == 1)
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*id = cells[0];
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else
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return (ERANGE);
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return (0);
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}
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int
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hwreset_get_by_ofw_idx(device_t consumer_dev, int idx, hwreset_t *rst)
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{
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phandle_t cnode, xnode;
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pcell_t *cells;
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device_t rstdev;
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int ncells, rv;
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intptr_t id;
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cnode = ofw_bus_get_node(consumer_dev);
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if (cnode <= 0) {
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device_printf(consumer_dev,
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"%s called on not ofw based device\n", __func__);
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return (ENXIO);
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}
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rv = ofw_bus_parse_xref_list_alloc(cnode, "resets", "#reset-cells",
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idx, &xnode, &ncells, &cells);
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if (rv != 0)
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return (rv);
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/* Tranlate provider to device */
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rstdev = OF_device_from_xref(xnode);
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if (rstdev == NULL) {
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free(cells, M_OFWPROP);
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return (ENODEV);
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}
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/* Map reset to number */
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rv = HWRESET_MAP(rstdev, xnode, ncells, cells, &id);
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free(cells, M_OFWPROP);
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if (rv != 0)
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return (rv);
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return (hwreset_get_by_id(consumer_dev, rstdev, id, rst));
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}
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int
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hwreset_get_by_ofw_name(device_t consumer_dev, char *name, hwreset_t *rst)
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{
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int rv, idx;
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phandle_t cnode;
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cnode = ofw_bus_get_node(consumer_dev);
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if (cnode <= 0) {
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device_printf(consumer_dev,
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"%s called on not ofw based device\n", __func__);
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return (ENXIO);
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}
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rv = ofw_bus_find_string_index(cnode, "reset-names", name, &idx);
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if (rv != 0)
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return (rv);
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return (hwreset_get_by_ofw_idx(consumer_dev, idx, rst));
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}
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void
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hwreset_register_ofw_provider(device_t provider_dev)
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{
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phandle_t xref, node;
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node = ofw_bus_get_node(provider_dev);
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if (node <= 0)
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panic("%s called on not ofw based device.\n", __func__);
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xref = OF_xref_from_node(node);
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OF_device_register_xref(xref, provider_dev);
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}
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void
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hwreset_unregister_ofw_provider(device_t provider_dev)
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{
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phandle_t xref;
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xref = OF_xref_from_device(provider_dev);
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OF_device_register_xref(xref, NULL);
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}
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#endif
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67
sys/dev/extres/hwreset/hwreset.h
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67
sys/dev/extres/hwreset/hwreset.h
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@ -0,0 +1,67 @@
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/*-
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* Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
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* All rights reserved.
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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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef DEV_EXTRES_HWRESET_HWRESET_H
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#define DEV_EXTRES_HWRESET_HWRESET_H
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#include "opt_platform.h"
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#include <sys/types.h>
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#ifdef FDT
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#include <dev/ofw/ofw_bus.h>
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#endif
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typedef struct hwreset *hwreset_t;
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/*
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* Provider interface
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*/
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#ifdef FDT
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int hwreset_default_ofw_map(device_t provider_dev, phandle_t xref, int ncells,
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pcell_t *cells, intptr_t *id);
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void hwreset_register_ofw_provider(device_t provider_dev);
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void hwreset_unregister_ofw_provider(device_t provider_dev);
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#endif
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/*
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* Consumer interface
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*/
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int hwreset_get_by_id(device_t consumer_dev, device_t provider_dev, intptr_t id,
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hwreset_t *rst);
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void hwreset_release(hwreset_t rst);
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int hwreset_assert(hwreset_t rst);
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int hwreset_deassert(hwreset_t rst);
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int hwreset_is_asserted(hwreset_t rst, bool *value);
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#ifdef FDT
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int hwreset_get_by_ofw_name(device_t consumer_dev, char *name, hwreset_t *rst);
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int hwreset_get_by_ofw_idx(device_t consumer_dev, int idx, hwreset_t *rst);
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#endif
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#endif /* DEV_EXTRES_HWRESET_HWRESET_H */
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72
sys/dev/extres/hwreset/hwreset_if.m
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72
sys/dev/extres/hwreset/hwreset_if.m
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@ -0,0 +1,72 @@
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#-
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# Copyright 2016 Michal Meloun <mmel@FreeBSD.org>
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# All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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#ifdef FDT
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#include <sys/types.h>
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#include <dev/ofw/ofw_bus.h>
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#endif
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INTERFACE hwreset;
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#ifdef FDT
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HEADER {
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int hwreset_default_ofw_map(device_t , phandle_t, int, pcell_t *, intptr_t *);
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}
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#
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# map fdt property cells to reset id
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# Returns 0 on success or a standard errno value.
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#
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METHOD int map {
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device_t provider_dev;
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phandle_t xref;
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int ncells;
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pcell_t *cells;
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intptr_t *id;
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} DEFAULT hwreset_default_ofw_map;
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#endif
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#
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# Assert/deassert given reset.
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# Returns 0 on success or a standard errno value.
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#
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METHOD int assert {
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device_t provider_dev;
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intptr_t id;
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bool value;
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};
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#
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# Get actual status of given reset.
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# Returns 0 on success or a standard errno value.
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#
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METHOD int is_asserted {
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device_t provider_dev;
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intptr_t id;
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bool *value;
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};
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Loading…
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Block a user