From nobody Tue Dec 17 11:47:10 2024 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4YCFR22Xj1z5h6ly; Tue, 17 Dec 2024 11:47:10 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R10" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4YCFR2225zz4XGy; Tue, 17 Dec 2024 11:47:10 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1734436030; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Vx7PQpPWSM1R5FhHntyXbohA4tjxdcm83hPvdxmY9c0=; b=MP9liO5j+AsAGoaC4KFKrdJNgYEoaxi0OQJBKQZhVSGTIx6/V7s0s5isdfi2M0ZbE0YAjl +PNWD7mB5Yj5CLzVtTUhTsHrAKmxIVimHq7RDKEmwegNRIGGA19Oe+iQI/9r2BQaqC1RES ckbgNo4kGqbfFhzNGmSkVxfyWRPKHwF4NQmu7UFlhFTLK1CxK5GAdvDKe3wkP5zwe4HAnw iuBU0nQOXR1c/LAd2HDOT0iBHxWwKAJBK2GVjfGARJWZ8X+5hVG0oivpp+c5REED3BtGrF QuMyD+DLutKTeFsjMecmnOll5H9Glxb2GCdA+v0AE9pX1p7F7mdWVXEmA/yQcg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1734436030; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Vx7PQpPWSM1R5FhHntyXbohA4tjxdcm83hPvdxmY9c0=; b=eBpimZid9ZEUkUgdSdm4mP17waoCwSMrOfe4KWAw//Idqh3vx296oqZEADcoZBpU88sgPj ZR4j8AfRlx7DYSuzSFMwB5Zr7MECb8da1EBCkUPOJS4RmQOSMXga+2rQXacGs8Lf+Rrg3d o19CeuD8aLwOkSlxQALbrKoQv43JQhWYqT7f0ws9+Aq9BvTjuQWsqf9NtWkTL1aDRUlJCL K93WQrFNhiY3MTOGBZyZ8Km+I0DU0yFlyfiO5NgNrbwKloa8odbIuiMfppaOjoHh4YXUUG LU0QGIe2HHnXmVJ5Ls6SFVLlswgs64SIavADGTRzQQVELgAg/QXq13Q2AlDbCQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1734436030; a=rsa-sha256; cv=none; b=Fnl+Jll68amrhQGyJDlibWaAUloN7WFVKizMGQkj4DfN90TaguNCwNdMJTbe8J4AMW5BZv QssDwwAZtQU0ABeXBKqPwyYkYaf5am5IA+zqV4SZNh3/QQzq9D5u9GHzRWqaePyl1cgtMi gbMOhdIghGKfVRyxtthAYRZ/VHF/RUQyF2XfCvmHpUa5UdIpxJc0fOMHWQlbFCaghdTmVX KDzxf9ZRKYuhSJCYleerccM/LEHS1JzXg/0RmoOGuAkfEvF9DAYa/4kmifRZEhP9AHXlMp vFbhH7OckVdQYkYBfiRkMAGnWtebHLE6fjtXlJ4dZaAUimt1Tp3GqgKyIU8T5g== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4YCFR21C6bzLHR; Tue, 17 Dec 2024 11:47:10 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.18.1/8.18.1) with ESMTP id 4BHBlA1W010568; Tue, 17 Dec 2024 11:47:10 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.18.1/8.18.1/Submit) id 4BHBlAs7010565; Tue, 17 Dec 2024 11:47:10 GMT (envelope-from git) Date: Tue, 17 Dec 2024 11:47:10 GMT Message-Id: <202412171147.4BHBlAs7010565@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Ruslan Bukin Subject: git: 56816e687557 - main - riscv: Eswin hwreset support added. List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: br X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 56816e68755725371ac89dc5aa882fdce46605a5 Auto-Submitted: auto-generated The branch main has been updated by br: URL: https://cgit.FreeBSD.org/src/commit/?id=56816e68755725371ac89dc5aa882fdce46605a5 commit 56816e68755725371ac89dc5aa882fdce46605a5 Author: Ruslan Bukin AuthorDate: 2024-12-17 11:35:08 +0000 Commit: Ruslan Bukin CommitDate: 2024-12-17 11:46:10 +0000 riscv: Eswin hwreset support added. Add reset controller driver for Eswin EIC7700. This one has two reset cells in FDT, which is unusual, so provide a custom hwreset_map method. Tested on SiFive Premier P550. Reviewed by: mhorne, jrtc27 Differential Revision: https://reviews.freebsd.org/D47853 --- sys/riscv/eswin/eswin_reset.c | 190 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) diff --git a/sys/riscv/eswin/eswin_reset.c b/sys/riscv/eswin/eswin_reset.c new file mode 100644 index 000000000000..13139e0c85ea --- /dev/null +++ b/sys/riscv/eswin/eswin_reset.c @@ -0,0 +1,190 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2024 Ruslan Bukin + * + * 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 AUTHOR 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 AUTHOR 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 +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include +#include +#include + +#include "syscon_if.h" +#include "hwreset_if.h" + +struct eswin_rst_softc { + device_t dev; + struct mtx mtx; + struct syscon *syscon; +}; + +#define RESET_BLOCK 0x400 +#define RESET_ID_TO_REG(x) (RESET_BLOCK + (x) * 4) + +#define ERST_LOCK(sc) mtx_lock(&(sc)->mtx) +#define ERST_UNLOCK(sc) mtx_unlock(&(sc)->mtx) +#define ERST_ASSERT_LOCKED(sc) mtx_assert(&(sc)->mtx, MA_OWNED); +#define ERST_ASSERT_UNLOCKED(sc) mtx_assert(&(sc)->mtx, MA_NOTOWNED); + +#define ERST_READ(_sc, _reg) \ + SYSCON_READ_4(sc->syscon, (_reg)) +#define ERST_WRITE(_sc, _reg, _val) \ + SYSCON_WRITE_4(sc->syscon, (_reg), (_val)) + +static struct ofw_compat_data compat_data[] = { + { "eswin,eic7700-reset", 1 }, + { NULL, 0 }, +}; + +static int +eswin_rst_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "Eswin Reset"); + + return (BUS_PROBE_DEFAULT); +} + +static int +eswin_rst_attach(device_t dev) +{ + struct eswin_rst_softc *sc; + int error; + + sc = device_get_softc(dev); + sc->dev = dev; + + error = syscon_get_by_ofw_node(dev, OF_parent(ofw_bus_get_node(dev)), + &sc->syscon); + if (error != 0) { + device_printf(dev, "Couldn't get syscon handle of parent\n"); + return (error); + } + + mtx_init(&sc->mtx, device_get_nameunit(sc->dev), NULL, MTX_DEF); + + hwreset_register_ofw_provider(dev); + + return (0); +} + +static int +eswin_rst_reset_assert(device_t dev, intptr_t id, bool reset) +{ + struct eswin_rst_softc *sc; + uint32_t reg; + uint32_t base; + uint32_t bit; + + sc = device_get_softc(dev); + + base = RESET_ID_TO_REG(id >> 5); + bit = id & 0x1f; + + ERST_LOCK(sc); + reg = ERST_READ(sc, base); + if (reset) + reg &= ~(1 << bit); + else + reg |= (1 << bit); + ERST_WRITE(sc, base, reg); + ERST_UNLOCK(sc); + + return (0); +} + +static int +eswin_rst_reset_is_asserted(device_t dev, intptr_t id, bool *reset) +{ + struct eswin_rst_softc *sc; + uint32_t reg; + uint32_t base; + uint32_t bit; + + sc = device_get_softc(dev); + + base = RESET_ID_TO_REG(id >> 5); + bit = id & 0x1f; + + ERST_LOCK(sc); + reg = ERST_READ(sc, base); + *reset = (reg & (1 << bit)) == 0; + ERST_UNLOCK(sc); + + return (0); +} + +static int +eswin_rst_map(device_t provider_dev, phandle_t xref, int ncells, + pcell_t *cells, intptr_t *id) +{ + + KASSERT(ncells == 2, ("wrong ncells")); + + *id = cells[0] << 5; + *id |= ilog2(cells[1]); + + return (0); +} + +static device_method_t eswin_rst_methods[] = { + /* Device interface. */ + DEVMETHOD(device_probe, eswin_rst_probe), + DEVMETHOD(device_attach, eswin_rst_attach), + + /* Reset interface. */ + DEVMETHOD(hwreset_assert, eswin_rst_reset_assert), + DEVMETHOD(hwreset_is_asserted, eswin_rst_reset_is_asserted), + DEVMETHOD(hwreset_map, eswin_rst_map), + + DEVMETHOD_END +}; + +static driver_t eswin_rst_driver = { + "eswin_rst", + eswin_rst_methods, + sizeof(struct eswin_rst_softc) +}; + +EARLY_DRIVER_MODULE(eswin_rst, simplebus, eswin_rst_driver, 0, 0, + BUS_PASS_BUS + BUS_PASS_ORDER_LATE);