dac935533b
In some cases, the driver must handle given properties located in specific OF subnode. Instead of creating duplicate set of function, add 'node' as argument to existing functions, defaulting it to device OF node. MFC after: 3 weeks
268 lines
6.7 KiB
C
268 lines
6.7 KiB
C
/*-
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* Copyright (c) 2016 Jared McNeill <jmcneill@invisible.ca>
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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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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/*
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* Allwinner USB clocks
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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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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#include <dev/ofw/ofw_subr.h>
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#include <dev/extres/clk/clk_gate.h>
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#include <dev/extres/hwreset/hwreset.h>
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#include "clkdev_if.h"
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#include "hwreset_if.h"
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#define A10_SCLK_GATING_USBPHY (1 << 8)
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#define A10_SCLK_GATING_OHCI1 (1 << 7)
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#define A10_SCLK_GATING_OHCI0 (1 << 6)
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#define USBPHY2_RST (1 << 2)
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#define USBPHY1_RST (1 << 1)
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#define USBPHY0_RST (1 << 0)
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enum aw_usbclk_type {
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AW_A10_USBCLK = 1,
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AW_A13_USBCLK,
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AW_A31_USBCLK,
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AW_A83T_USBCLK,
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AW_H3_USBCLK,
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};
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static struct ofw_compat_data compat_data[] = {
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{ "allwinner,sun4i-a10-usb-clk", AW_A10_USBCLK },
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{ "allwinner,sun5i-a13-usb-clk", AW_A13_USBCLK },
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{ "allwinner,sun6i-a31-usb-clk", AW_A31_USBCLK },
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{ "allwinner,sun8i-a83t-usb-clk", AW_A83T_USBCLK },
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{ "allwinner,sun8i-h3-usb-clk", AW_H3_USBCLK },
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{ NULL, 0 }
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};
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/* Clock indices for A10, as there is no clock-indices property in the DT */
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static uint32_t aw_usbclk_indices_a10[] = { 6, 7, 8 };
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/* Clock indices for H3, as there is no clock-indices property in the DT */
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static uint32_t aw_usbclk_indices_h3[] = { 8, 9, 10, 11, 16, 17, 18, 19 };
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struct aw_usbclk_softc {
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bus_addr_t reg;
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};
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static int
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aw_usbclk_hwreset_assert(device_t dev, intptr_t id, bool value)
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{
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struct aw_usbclk_softc *sc;
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uint32_t mask;
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device_t pdev;
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int error;
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sc = device_get_softc(dev);
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pdev = device_get_parent(dev);
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mask = USBPHY0_RST << id;
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CLKDEV_DEVICE_LOCK(pdev);
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error = CLKDEV_MODIFY_4(pdev, sc->reg, mask, value ? 0 : mask);
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CLKDEV_DEVICE_UNLOCK(pdev);
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return (error);
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}
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static int
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aw_usbclk_hwreset_is_asserted(device_t dev, intptr_t id, bool *value)
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{
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struct aw_usbclk_softc *sc;
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uint32_t mask, val;
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device_t pdev;
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int error;
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sc = device_get_softc(dev);
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pdev = device_get_parent(dev);
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mask = USBPHY0_RST << id;
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CLKDEV_DEVICE_LOCK(pdev);
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error = CLKDEV_READ_4(pdev, sc->reg, &val);
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CLKDEV_DEVICE_UNLOCK(pdev);
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if (error)
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return (error);
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*value = (val & mask) != 0 ? false : true;
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return (0);
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}
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static int
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aw_usbclk_create(device_t dev, bus_addr_t paddr, struct clkdom *clkdom,
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const char *pclkname, const char *clkname, int index)
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{
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const char *parent_names[1] = { pclkname };
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struct clk_gate_def def;
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memset(&def, 0, sizeof(def));
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def.clkdef.id = index;
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def.clkdef.name = clkname;
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def.clkdef.parent_names = parent_names;
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def.clkdef.parent_cnt = 1;
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def.offset = paddr;
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def.shift = index;
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def.mask = 1;
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def.on_value = 1;
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def.off_value = 0;
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return (clknode_gate_register(clkdom, &def));
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}
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static int
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aw_usbclk_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "Allwinner USB Clocks");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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aw_usbclk_attach(device_t dev)
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{
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struct aw_usbclk_softc *sc;
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struct clkdom *clkdom;
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const char **names;
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const char *pname;
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int index, nout, error;
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enum aw_usbclk_type type;
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uint32_t *indices;
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clk_t clk_parent, clk_parent_pll;
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bus_size_t psize;
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phandle_t node;
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sc = device_get_softc(dev);
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node = ofw_bus_get_node(dev);
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indices = NULL;
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type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
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if (ofw_reg_to_paddr(node, 0, &sc->reg, &psize, NULL) != 0) {
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device_printf(dev, "cannot parse 'reg' property\n");
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return (ENXIO);
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}
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clkdom = clkdom_create(dev);
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nout = clk_parse_ofw_out_names(dev, node, &names, &indices);
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if (nout == 0) {
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device_printf(dev, "no clock outputs found\n");
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error = ENOENT;
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goto fail;
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}
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if (indices == NULL && type == AW_A10_USBCLK)
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indices = aw_usbclk_indices_a10;
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else if (indices == NULL && type == AW_H3_USBCLK)
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indices = aw_usbclk_indices_h3;
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error = clk_get_by_ofw_index(dev, 0, 0, &clk_parent);
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if (error != 0) {
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device_printf(dev, "cannot parse clock parent\n");
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return (ENXIO);
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}
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if (type == AW_A83T_USBCLK) {
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error = clk_get_by_ofw_index(dev, 0, 1, &clk_parent_pll);
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if (error != 0) {
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device_printf(dev, "cannot parse pll clock parent\n");
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return (ENXIO);
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}
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}
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for (index = 0; index < nout; index++) {
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if (strcmp(names[index], "usb_hsic_pll") == 0)
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pname = clk_get_name(clk_parent_pll);
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else
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pname = clk_get_name(clk_parent);
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error = aw_usbclk_create(dev, sc->reg, clkdom, pname,
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names[index], indices != NULL ? indices[index] : index);
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if (error)
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goto fail;
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}
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if (clkdom_finit(clkdom) != 0) {
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device_printf(dev, "cannot finalize clkdom initialization\n");
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error = ENXIO;
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goto fail;
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}
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if (bootverbose)
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clkdom_dump(clkdom);
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hwreset_register_ofw_provider(dev);
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return (0);
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fail:
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return (error);
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}
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static device_method_t aw_usbclk_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, aw_usbclk_probe),
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DEVMETHOD(device_attach, aw_usbclk_attach),
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/* Reset interface */
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DEVMETHOD(hwreset_assert, aw_usbclk_hwreset_assert),
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DEVMETHOD(hwreset_is_asserted, aw_usbclk_hwreset_is_asserted),
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DEVMETHOD_END
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};
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static driver_t aw_usbclk_driver = {
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"aw_usbclk",
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aw_usbclk_methods,
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sizeof(struct aw_usbclk_softc)
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};
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static devclass_t aw_usbclk_devclass;
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EARLY_DRIVER_MODULE(aw_usbclk, simplebus, aw_usbclk_driver,
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aw_usbclk_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
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