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[src/trunk]: src/sys/dev/fdt Add support for Arasan SDHCI 5.1
details: https://anonhg.NetBSD.org/src/rev/b01a3b5f31c6
branches: trunk
changeset: 839957:b01a3b5f31c6
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Wed Mar 13 12:17:45 2019 +0000
description:
Add support for Arasan SDHCI 5.1
diffstat:
sys/dev/fdt/arasan_sdhc_fdt.c | 306 ++++++++++++++++++++++++++++++++++++++++++
sys/dev/fdt/files.fdt | 6 +-
2 files changed, 311 insertions(+), 1 deletions(-)
diffs (truncated from 327 to 300 lines):
diff -r e7d24635c8a0 -r b01a3b5f31c6 sys/dev/fdt/arasan_sdhc_fdt.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/fdt/arasan_sdhc_fdt.c Wed Mar 13 12:17:45 2019 +0000
@@ -0,0 +1,306 @@
+/* $NetBSD: arasan_sdhc_fdt.c,v 1.1 2019/03/13 12:17:45 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2019 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * 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 ``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 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 <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: arasan_sdhc_fdt.c,v 1.1 2019/03/13 12:17:45 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/sysctl.h>
+#include <sys/kmem.h>
+
+#include <dev/sdmmc/sdhcreg.h>
+#include <dev/sdmmc/sdhcvar.h>
+#include <dev/sdmmc/sdmmcvar.h>
+
+#include <dev/clk/clk_backend.h>
+
+#include <dev/fdt/fdtvar.h>
+#include <dev/fdt/syscon.h>
+
+#define RK3399_GRF_EMMCCORE_CON0 0xf000
+#define RK3399_CORECFG_BASECLKFREQ __BITS(15,8)
+#define RK3399_CORECFG_TIMEOUTCLKUNIT __BIT(7)
+#define RK3399_CORECFG_TUNINGCOUNT __BITS(5,0)
+#define RK3399_GRF_EMMCCORE_CON11 0xf02c
+#define RK3399_CORECFG_CLOCKMULTIPLIER __BITS(7,0)
+
+enum arasan_sdhc_type {
+ AS_TYPE_RK3399 = 1,
+};
+
+struct arasan_sdhc_softc {
+ struct sdhc_softc sc_base;
+ struct sdhc_host *sc_host[1];
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+ bus_size_t sc_bsz;
+ int sc_phandle;
+ struct fdtbus_phy *sc_phy;
+ struct syscon *sc_syscon;
+ struct clk *sc_clk_xin;
+ struct clk *sc_clk_ahb;
+ enum arasan_sdhc_type sc_type;
+ struct clk_domain sc_clkdom;
+ struct clk sc_clk_card;
+};
+
+static const struct of_compat_data compat_data[] = {
+ { "rockchip,rk3399-sdhci-5.1", AS_TYPE_RK3399 },
+ { NULL }
+};
+
+static struct clk *
+arasan_sdhc_clk_decode(device_t dev, int cc_phandle, const void *data, size_t len)
+{
+ struct arasan_sdhc_softc * const sc = device_private(dev);
+
+ if (len != 0)
+ return NULL;
+
+ return &sc->sc_clk_card;
+}
+
+static const struct fdtbus_clock_controller_func arasan_sdhc_fdt_clk_funcs = {
+ .decode = arasan_sdhc_clk_decode,
+};
+
+static struct clk *
+arasan_sdhc_clk_get(void *priv, const char *name)
+{
+ struct arasan_sdhc_softc * const sc = priv;
+
+ if (strcmp(name, sc->sc_clk_card.name) != 0)
+ return NULL;
+
+ return &sc->sc_clk_card;
+}
+
+static u_int
+arasan_sdhc_clk_get_rate(void *priv, struct clk *clk)
+{
+ struct arasan_sdhc_softc * const sc = priv;
+
+ return clk_get_rate(sc->sc_clk_xin);
+}
+
+static const struct clk_funcs arasan_sdhc_clk_funcs = {
+ .get = arasan_sdhc_clk_get,
+ .get_rate = arasan_sdhc_clk_get_rate,
+};
+
+static int
+arasan_sdhc_signal_voltage(struct sdhc_softc *sdhc, int signal_voltage)
+{
+ if (signal_voltage == SDMMC_SIGNAL_VOLTAGE_180)
+ return 0;
+
+ return EINVAL;
+}
+
+static int
+arasan_sdhc_bus_clock_pre(struct sdhc_softc *sdhc, int freq)
+{
+ struct arasan_sdhc_softc * const sc = device_private(sdhc->sc_dev);
+ int error;
+
+ if (sc->sc_phy != NULL) {
+ error = fdtbus_phy_enable(sc->sc_phy, false);
+ if (error != 0)
+ return error;
+ }
+
+ return 0;
+}
+
+static int
+arasan_sdhc_bus_clock_post(struct sdhc_softc *sdhc, int freq)
+{
+ struct arasan_sdhc_softc * const sc = device_private(sdhc->sc_dev);
+ int error;
+
+ if (sc->sc_phy != NULL) {
+ error = fdtbus_phy_enable(sc->sc_phy, true);
+ if (error != 0)
+ return error;
+ }
+
+ return 0;
+}
+
+static void
+arasan_sdhc_init_rk3399(struct arasan_sdhc_softc *sc)
+{
+ uint32_t mask, val;
+
+ if (sc->sc_syscon == NULL)
+ return;
+
+ syscon_lock(sc->sc_syscon);
+
+ /* Disable clock multiplier */
+ mask = RK3399_CORECFG_CLOCKMULTIPLIER;
+ val = 0;
+ syscon_write_4(sc->sc_syscon, RK3399_GRF_EMMCCORE_CON11, (mask << 16) | val);
+
+ /* Set base clock frequency */
+ const u_int xin_rate = clk_get_rate(sc->sc_clk_xin);
+ mask = RK3399_CORECFG_BASECLKFREQ;
+ val = __SHIFTIN((xin_rate + (1000000 / 2)) / 1000000, RK3399_CORECFG_BASECLKFREQ);
+ syscon_write_4(sc->sc_syscon, RK3399_GRF_EMMCCORE_CON0, (mask << 16) | val);
+
+ syscon_unlock(sc->sc_syscon);
+}
+
+static void
+arasan_sdhc_init(device_t dev)
+{
+ struct arasan_sdhc_softc * const sc = device_private(dev);
+ const char * sdhci_5_1_compat[] = { "arasan,sdhci-5.1", NULL };
+ int error;
+
+ if (sc->sc_type == AS_TYPE_RK3399)
+ arasan_sdhc_init_rk3399(sc);
+
+ if (of_match_compatible(sc->sc_phandle, sdhci_5_1_compat)) {
+ sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "phy_arasan");
+ if (sc->sc_phy == NULL) {
+ aprint_error_dev(dev, "couldn't get PHY\n");
+ return;
+ }
+ sc->sc_base.sc_vendor_signal_voltage = arasan_sdhc_signal_voltage;
+ }
+
+ error = sdhc_host_found(&sc->sc_base, sc->sc_bst, sc->sc_bsh, sc->sc_bsz);
+ if (error != 0) {
+ aprint_error_dev(dev, "couldn't initialize host, error = %d\n", error);
+ return;
+ }
+}
+
+static int
+arasan_sdhc_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct fdt_attach_args * const faa = aux;
+
+ return of_match_compat_data(faa->faa_phandle, compat_data);
+}
+
+static void
+arasan_sdhc_attach(device_t parent, device_t self, void *aux)
+{
+ struct arasan_sdhc_softc * const sc = device_private(self);
+ struct fdt_attach_args * const faa = aux;
+ const int phandle = faa->faa_phandle;
+ char intrstr[128];
+ const char *clkname;
+ bus_addr_t addr;
+ bus_size_t size;
+ u_int bus_width;
+ void *ih;
+
+ fdtbus_clock_assign(phandle);
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+ aprint_error(": couldn't get registers\n");
+ return;
+ }
+
+ if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
+ aprint_error(": couldn't decode interrupt\n");
+ return;
+ }
+
+ sc->sc_clk_xin = fdtbus_clock_get(phandle, "clk_xin");
+ sc->sc_clk_ahb = fdtbus_clock_get(phandle, "clk_ahb");
+ if (sc->sc_clk_xin == NULL || sc->sc_clk_ahb == NULL) {
+ aprint_error(": couldn't get clocks\n");
+ return;
+ }
+ if (clk_enable(sc->sc_clk_xin) != 0 || clk_enable(sc->sc_clk_ahb) != 0) {
+ aprint_error(": couldn't enable clocks\n");
+ return;
+ }
+
+ sc->sc_syscon = fdtbus_syscon_acquire(phandle, "arasan,soc-ctl-syscon");
+
+ if (of_getprop_uint32(phandle, "bus-width", &bus_width) != 0)
+ bus_width = 4;
+
+ sc->sc_phandle = phandle;
+ sc->sc_bst = faa->faa_bst;
+ if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+ aprint_error(": couldn't map registers\n");
+ return;
+ }
+ sc->sc_bsz = size;
+ sc->sc_type = of_search_compatible(phandle, compat_data)->data;
+
+ sc->sc_base.sc_dev = self;
+ sc->sc_base.sc_dmat = faa->faa_dmat;
+ sc->sc_base.sc_host = sc->sc_host;
+ sc->sc_base.sc_flags = SDHC_FLAG_NO_CLKBASE |
+ SDHC_FLAG_USE_DMA |
+ SDHC_FLAG_USE_ADMA2 |
+ SDHC_FLAG_STOP_WITH_TC;
+ if (bus_width == 8)
+ sc->sc_base.sc_flags |= SDHC_FLAG_8BIT_MODE;
+ sc->sc_base.sc_clkbase = clk_get_rate(sc->sc_clk_xin) / 1000;
+ sc->sc_base.sc_vendor_bus_clock = arasan_sdhc_bus_clock_pre;
+ sc->sc_base.sc_vendor_bus_clock_post = arasan_sdhc_bus_clock_post;
+
+ aprint_naive("\n");
+ aprint_normal(": Arasan SDHCI controller\n");
+
+ clkname = fdtbus_get_string(phandle, "clock-output-names");
+ if (clkname == NULL)
+ clkname = faa->faa_name;
+
+ sc->sc_clkdom.name = device_xname(self);
+ sc->sc_clkdom.funcs = &arasan_sdhc_clk_funcs;
+ sc->sc_clkdom.priv = sc;
+ sc->sc_clk_card.domain = &sc->sc_clkdom;
+ sc->sc_clk_card.name = kmem_asprintf("%s", clkname);
+ clk_attach(&sc->sc_clk_card);
+
+ fdtbus_register_clock_controller(self, phandle, &arasan_sdhc_fdt_clk_funcs);
+
+ ih = fdtbus_intr_establish(phandle, 0, IPL_SDMMC, 0, sdhc_intr, &sc->sc_base);
+ if (ih == NULL) {
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