xref: /netbsd-src/sys/arch/arm/sunxi/sunxi_sid.c (revision c7941324122a924b6e20c322a6b49a6a3b6137e7)
1*c7941324Sskrll /* $NetBSD: sunxi_sid.c,v 1.8 2024/08/13 07:20:23 skrll Exp $ */
24f0c0b5eSjmcneill 
34f0c0b5eSjmcneill /*-
44f0c0b5eSjmcneill  * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
54f0c0b5eSjmcneill  * All rights reserved.
64f0c0b5eSjmcneill  *
74f0c0b5eSjmcneill  * Redistribution and use in source and binary forms, with or without
84f0c0b5eSjmcneill  * modification, are permitted provided that the following conditions
94f0c0b5eSjmcneill  * are met:
104f0c0b5eSjmcneill  * 1. Redistributions of source code must retain the above copyright
114f0c0b5eSjmcneill  *    notice, this list of conditions and the following disclaimer.
124f0c0b5eSjmcneill  * 2. Redistributions in binary form must reproduce the above copyright
134f0c0b5eSjmcneill  *    notice, this list of conditions and the following disclaimer in the
144f0c0b5eSjmcneill  *    documentation and/or other materials provided with the distribution.
154f0c0b5eSjmcneill  *
164f0c0b5eSjmcneill  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
174f0c0b5eSjmcneill  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
184f0c0b5eSjmcneill  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
194f0c0b5eSjmcneill  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
204f0c0b5eSjmcneill  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
214f0c0b5eSjmcneill  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
224f0c0b5eSjmcneill  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
234f0c0b5eSjmcneill  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
244f0c0b5eSjmcneill  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
254f0c0b5eSjmcneill  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
264f0c0b5eSjmcneill  * SUCH DAMAGE.
274f0c0b5eSjmcneill  */
284f0c0b5eSjmcneill 
294f0c0b5eSjmcneill #include <sys/cdefs.h>
30*c7941324Sskrll __KERNEL_RCSID(0, "$NetBSD: sunxi_sid.c,v 1.8 2024/08/13 07:20:23 skrll Exp $");
314f0c0b5eSjmcneill 
324f0c0b5eSjmcneill #include <sys/param.h>
334f0c0b5eSjmcneill #include <sys/bus.h>
344f0c0b5eSjmcneill #include <sys/device.h>
354f0c0b5eSjmcneill #include <sys/intr.h>
364f0c0b5eSjmcneill #include <sys/systm.h>
374f0c0b5eSjmcneill 
384f0c0b5eSjmcneill #include <dev/fdt/fdtvar.h>
394f0c0b5eSjmcneill 
404f0c0b5eSjmcneill #include <arm/sunxi/sunxi_sid.h>
414f0c0b5eSjmcneill 
424f0c0b5eSjmcneill #define	EFUSE_THERMAL_CALIB0	0x34
434f0c0b5eSjmcneill #define	EFUSE_THERMAL_CALIB1	0x38
444f0c0b5eSjmcneill 
454f0c0b5eSjmcneill struct sunxi_sid_config {
464f0c0b5eSjmcneill 	bus_size_t	efuse_offset;
474f0c0b5eSjmcneill };
484f0c0b5eSjmcneill 
494f0c0b5eSjmcneill static const struct sunxi_sid_config sun4i_a10_sid_config = {
504f0c0b5eSjmcneill 	.efuse_offset = 0,
514f0c0b5eSjmcneill };
524f0c0b5eSjmcneill 
534f0c0b5eSjmcneill static const struct sunxi_sid_config sun8i_h3_sid_config = {
544f0c0b5eSjmcneill 	.efuse_offset = 0x200,
554f0c0b5eSjmcneill };
564f0c0b5eSjmcneill 
57646c0f59Sthorpej static const struct device_compatible_entry compat_data[] = {
58646c0f59Sthorpej 	{ .compat = "allwinner,sun4i-a10-sid",	.data = &sun4i_a10_sid_config },
59646c0f59Sthorpej 	{ .compat = "allwinner,sun7i-a20-sid",	.data = &sun4i_a10_sid_config },
60646c0f59Sthorpej 	{ .compat = "allwinner,sun8i-h3-sid",	.data = &sun8i_h3_sid_config },
61646c0f59Sthorpej 	{ .compat = "allwinner,sun8i-a83t-sid",	.data = &sun8i_h3_sid_config },
62*c7941324Sskrll 	{ .compat = "allwinner,sun20i-d1-sid",	.data = &sun8i_h3_sid_config },
63646c0f59Sthorpej 	{ .compat = "allwinner,sun50i-a64-sid",	.data = &sun8i_h3_sid_config },
64ec189949Sthorpej 	DEVICE_COMPAT_EOL
654f0c0b5eSjmcneill };
664f0c0b5eSjmcneill 
674f0c0b5eSjmcneill struct sunxi_sid_softc {
684f0c0b5eSjmcneill 	device_t			sc_dev;
694f0c0b5eSjmcneill 	bus_space_tag_t			sc_bst;
704f0c0b5eSjmcneill 	bus_space_handle_t		sc_bsh;
714f0c0b5eSjmcneill 	const struct sunxi_sid_config	*sc_conf;
724f0c0b5eSjmcneill };
734f0c0b5eSjmcneill 
744f0c0b5eSjmcneill static struct sunxi_sid_softc *sid_softc = NULL;
754f0c0b5eSjmcneill 
764f0c0b5eSjmcneill #define EFUSE_READ(sc, reg) \
774f0c0b5eSjmcneill     bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (sc)->sc_conf->efuse_offset + (reg))
784f0c0b5eSjmcneill #define EFUSE_WRITE(sc, reg, val) \
794f0c0b5eSjmcneill     bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (sc)->sc_conf->efuse_offset + (reg), (val))
804f0c0b5eSjmcneill 
814f0c0b5eSjmcneill static int
824f0c0b5eSjmcneill sunxi_sid_match(device_t parent, cfdata_t cf, void *aux)
834f0c0b5eSjmcneill {
844f0c0b5eSjmcneill 	struct fdt_attach_args * const faa = aux;
854f0c0b5eSjmcneill 
866e54367aSthorpej 	return of_compatible_match(faa->faa_phandle, compat_data);
874f0c0b5eSjmcneill }
884f0c0b5eSjmcneill 
894f0c0b5eSjmcneill static void
904f0c0b5eSjmcneill sunxi_sid_attach(device_t parent, device_t self, void *aux)
914f0c0b5eSjmcneill {
924f0c0b5eSjmcneill 	struct sunxi_sid_softc * const sc = device_private(self);
934f0c0b5eSjmcneill 	struct fdt_attach_args * const faa = aux;
944f0c0b5eSjmcneill 	const int phandle = faa->faa_phandle;
954f0c0b5eSjmcneill 	bus_addr_t addr;
964f0c0b5eSjmcneill 	bus_size_t size;
974f0c0b5eSjmcneill 
984f0c0b5eSjmcneill 	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
994f0c0b5eSjmcneill 		aprint_error(": couldn't get registers\n");
1004f0c0b5eSjmcneill 		return;
1014f0c0b5eSjmcneill 	}
1024f0c0b5eSjmcneill 
1034f0c0b5eSjmcneill 	sc->sc_dev = self;
1044f0c0b5eSjmcneill 	sc->sc_bst = faa->faa_bst;
1054f0c0b5eSjmcneill 	if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
1064f0c0b5eSjmcneill 		aprint_error(": couldn't map registers\n");
1074f0c0b5eSjmcneill 		return;
1084f0c0b5eSjmcneill 	}
1096e54367aSthorpej 	sc->sc_conf = of_compatible_lookup(phandle, compat_data)->data;
1104f0c0b5eSjmcneill 
1114f0c0b5eSjmcneill 	aprint_naive("\n");
1124f0c0b5eSjmcneill 	aprint_normal(": Security ID EFUSE\n");
1134f0c0b5eSjmcneill 
1144f0c0b5eSjmcneill 	KASSERT(sid_softc == NULL);
1154f0c0b5eSjmcneill 	sid_softc = sc;
1164f0c0b5eSjmcneill }
1174f0c0b5eSjmcneill 
1184f0c0b5eSjmcneill CFATTACH_DECL_NEW(sunxi_sid, sizeof(struct sunxi_sid_softc),
1194f0c0b5eSjmcneill 	sunxi_sid_match, sunxi_sid_attach, NULL, NULL);
1204f0c0b5eSjmcneill 
1214f0c0b5eSjmcneill int
1224f0c0b5eSjmcneill sunxi_sid_read_tscalib(uint32_t *calib)
1234f0c0b5eSjmcneill {
1244f0c0b5eSjmcneill 	if (sid_softc == NULL)
1254f0c0b5eSjmcneill 		return ENXIO;
1264f0c0b5eSjmcneill 
1274f0c0b5eSjmcneill 	calib[0] = EFUSE_READ(sid_softc, EFUSE_THERMAL_CALIB0);
1284f0c0b5eSjmcneill 	calib[1] = EFUSE_READ(sid_softc, EFUSE_THERMAL_CALIB1);
1294f0c0b5eSjmcneill 	return 0;
1304f0c0b5eSjmcneill }
131