[src/trunk]: src/sys/arch/arm/sunxi Add a simple Security ID EFUSE driver.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f439c14f73da
branches:  trunk
changeset: 826882:f439c14f73da
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Tue Oct 03 23:42:17 2017 +0000

description:
Add a simple Security ID EFUSE driver.

diffstat:

 sys/arch/arm/sunxi/files.sunxi |    7 +-
 sys/arch/arm/sunxi/sunxi_sid.c |  127 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+), 1 deletions(-)

diffs (152 lines):

diff -r 8f50996208b5 -r f439c14f73da sys/arch/arm/sunxi/files.sunxi
--- a/sys/arch/arm/sunxi/files.sunxi    Tue Oct 03 15:27:10 2017 +0000
+++ b/sys/arch/arm/sunxi/files.sunxi    Tue Oct 03 23:42:17 2017 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.sunxi,v 1.24 2017/09/30 12:48:58 jmcneill Exp $
+#      $NetBSD: files.sunxi,v 1.25 2017/10/03 23:42:17 jmcneill Exp $
 #
 # Configuration info for Allwinner sunxi family SoCs
 #
@@ -169,6 +169,11 @@
 attach motg at fdt with sunxi_musb
 file   arch/arm/sunxi/sunxi_musb.c             sunxi_musb
 
+# Security ID EFUSE
+device sunxisid
+attach sunxisid at fdt with sunxi_sid
+file   arch/arm/sunxi/sunxi_sid.c              sunxi_sid
+
 # SOC parameters
 defflag        opt_soc.h                       SOC_SUNXI
 defflag        opt_soc.h                       SOC_SUN5I: SOC_SUNXI
diff -r 8f50996208b5 -r f439c14f73da sys/arch/arm/sunxi/sunxi_sid.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/sunxi/sunxi_sid.c    Tue Oct 03 23:42:17 2017 +0000
@@ -0,0 +1,127 @@
+/* $NetBSD: sunxi_sid.c,v 1.1 2017/10/03 23:42:17 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 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: sunxi_sid.c,v 1.1 2017/10/03 23:42:17 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <arm/sunxi/sunxi_sid.h>
+
+#define        EFUSE_THERMAL_CALIB0    0x34
+#define        EFUSE_THERMAL_CALIB1    0x38
+
+struct sunxi_sid_config {
+       bus_size_t      efuse_offset;
+};
+
+static const struct sunxi_sid_config sun4i_a10_sid_config = {
+       .efuse_offset = 0,
+};
+
+static const struct sunxi_sid_config sun8i_h3_sid_config = {
+       .efuse_offset = 0x200,
+};
+
+static const struct of_compat_data compat_data[] = {
+       { "allwinner,sun4i-a10-sid",    (uintptr_t)&sun4i_a10_sid_config },
+       { "allwinner,sun7i-a20-sid",    (uintptr_t)&sun4i_a10_sid_config },
+       { "allwinner,sun8i-h3-sid",     (uintptr_t)&sun8i_h3_sid_config },
+       { NULL }
+};
+
+struct sunxi_sid_softc {
+       device_t                        sc_dev;
+       bus_space_tag_t                 sc_bst;
+       bus_space_handle_t              sc_bsh;
+       const struct sunxi_sid_config   *sc_conf;
+};
+
+static struct sunxi_sid_softc *sid_softc = NULL;
+
+#define EFUSE_READ(sc, reg) \
+    bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (sc)->sc_conf->efuse_offset + (reg))
+#define EFUSE_WRITE(sc, reg, val) \
+    bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (sc)->sc_conf->efuse_offset + (reg), (val))
+
+static int
+sunxi_sid_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
+sunxi_sid_attach(device_t parent, device_t self, void *aux)
+{
+       struct sunxi_sid_softc * const sc = device_private(self);
+       struct fdt_attach_args * const faa = aux;
+       const int phandle = faa->faa_phandle;
+       bus_addr_t addr;
+       bus_size_t size;
+
+       if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+               aprint_error(": couldn't get registers\n");
+               return;
+       }
+
+       sc->sc_dev = self;
+       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_conf = (void *)of_search_compatible(phandle, compat_data)->data;
+
+       aprint_naive("\n");
+       aprint_normal(": Security ID EFUSE\n");
+
+       KASSERT(sid_softc == NULL);
+       sid_softc = sc;
+}
+
+CFATTACH_DECL_NEW(sunxi_sid, sizeof(struct sunxi_sid_softc),
+       sunxi_sid_match, sunxi_sid_attach, NULL, NULL);
+
+int
+sunxi_sid_read_tscalib(uint32_t *calib)
+{
+       if (sid_softc == NULL)
+               return ENXIO;
+
+       calib[0] = EFUSE_READ(sid_softc, EFUSE_THERMAL_CALIB0);
+       calib[1] = EFUSE_READ(sid_softc, EFUSE_THERMAL_CALIB1);
+       return 0;
+}