diff options
author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2016-03-28 17:29:12 +0000 |
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committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2016-03-28 17:29:12 +0000 |
commit | 3986c379d9706ec366bbbb28c5f4f4877ab37f8f (patch) | |
tree | dac988c7b9ce5017d1b84db01c15c1be20bdb28f | |
parent | f7e7aa6237dc392f67e88d7f8828262832b284ac (diff) |
Add bytgpio(4) a driver for the gpio controllers found on Intel's Bay Trail
SoC.
-rw-r--r-- | sys/dev/acpi/bytgpio.c | 242 | ||||
-rw-r--r-- | sys/dev/acpi/files.acpi | 7 |
2 files changed, 248 insertions, 1 deletions
diff --git a/sys/dev/acpi/bytgpio.c b/sys/dev/acpi/bytgpio.c new file mode 100644 index 00000000000..46978d31609 --- /dev/null +++ b/sys/dev/acpi/bytgpio.c @@ -0,0 +1,242 @@ +/* $OpenBSD: bytgpio.c,v 1.1 2016/03/28 17:29:11 kettenis Exp $ */ +/* + * Copyright (c) 2016 Mark Kettenis + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/param.h> +#include <sys/malloc.h> +#include <sys/systm.h> + +#include <dev/acpi/acpireg.h> +#include <dev/acpi/acpivar.h> +#include <dev/acpi/acpidev.h> +#include <dev/acpi/amltypes.h> +#include <dev/acpi/dsdt.h> + +#define BYTGPIO_PAD_VAL 0x00000001 + +struct bytgpio_softc { + struct device sc_dev; + struct acpi_softc *sc_acpi; + struct aml_node *sc_node; + + bus_space_tag_t sc_memt; + bus_space_handle_t sc_memh; + bus_addr_t sc_addr; + bus_size_t sc_size; + + int sc_irq; + int sc_irq_flags; + void *sc_ih; + + const int *sc_pins; + int sc_npins; + + struct acpi_gpio sc_gpio; +}; + +int bytgpio_match(struct device *, void *, void *); +void bytgpio_attach(struct device *, struct device *, void *); + +struct cfattach bytgpio_ca = { + sizeof(struct bytgpio_softc), bytgpio_match, bytgpio_attach +}; + +struct cfdriver bytgpio_cd = { + NULL, "bytgpio", DV_DULL +}; + +const char *bytgpio_hids[] = { + "INT33FC", + 0 +}; + +/* + * The pads for the pins are randomly ordered. + */ + +const int byt_score_pins[] = { + 85, 89, 93, 96, 99, 102, 98, 101, 34, 37, 36, 38, 39, 35, 40, + 84, 62, 61, 64, 59, 54, 56, 60, 55, 63, 57, 51, 50, 53, 47, + 52, 49, 48, 43, 46, 41, 45, 42, 58, 44, 95, 105, 70, 68, 67, + 66, 69, 71, 65, 72, 86, 90, 88, 92, 103, 77, 79, 83, 78, 81, + 80, 82, 13, 12, 15, 14, 17, 18, 19, 16, 2, 1, 0, 4, 6, 7, 9, + 8, 33, 32, 31, 30, 29, 27, 25, 28, 26, 23, 21, 20, 24, 22, 5, + 3, 10, 11, 106, 87, 91, 104, 97, 100 +}; + +const int byt_ncore_pins[] = { + 19, 18, 17, 20, 21, 22, 24, 25, 23, 16, 14, 15, 12, 26, 27, + 1, 4, 8, 11, 0, 3, 6, 10, 13, 2, 5, 9, 7 +}; + +const int byt_sus_pins[] = { + 29, 33, 30, 31, 32, 34, 36, 35, 38, 37, 18, 7, 11, 20, 17, 1, + 8, 10, 19, 12, 0, 2, 23, 39, 28, 27, 22, 21, 24, 25, 26, 51, + 56, 54, 49, 55, 48, 57, 50, 58, 52, 53, 59, 40 +}; + +int bytgpio_parse_resources(union acpi_resource *, void *); +int bytgpio_read_pin(void *, int); +int bytgpio_intr(void *); + +int +bytgpio_match(struct device *parent, void *match, void *aux) +{ + struct acpi_attach_args *aaa = aux; + struct cfdata *cf = match; + int64_t sta; + + if (!acpi_matchhids(aaa, bytgpio_hids, cf->cf_driver->cd_name)) + return 0; + + if (aml_evalinteger((struct acpi_softc *)parent, aaa->aaa_node, + "_STA", 0, NULL, &sta)) + sta = STA_PRESENT | STA_ENABLED | STA_DEV_OK | 0x1000; + + if ((sta & STA_PRESENT) == 0) + return 0; + + return 1; +} + +void +bytgpio_attach(struct device *parent, struct device *self, void *aux) +{ + struct acpi_attach_args *aaa = aux; + struct bytgpio_softc *sc = (struct bytgpio_softc *)self; + struct aml_value res; + int64_t uid; + + sc->sc_acpi = (struct acpi_softc *)parent; + sc->sc_node = aaa->aaa_node; + printf(": %s", sc->sc_node->name); + + if (aml_evalinteger(sc->sc_acpi, sc->sc_node, "_UID", 0, NULL, &uid)) { + printf(", can't find uid\n"); + return; + } + + printf(" uid %lld", uid); + + switch (uid) { + case 1: + sc->sc_pins = byt_score_pins; + sc->sc_npins = nitems(byt_score_pins); + break; + case 2: + sc->sc_pins = byt_ncore_pins; + sc->sc_npins = nitems(byt_ncore_pins); + break; + case 3: + sc->sc_pins = byt_sus_pins; + sc->sc_npins = nitems(byt_sus_pins); + break; + default: + return; + } + + if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) { + printf(", can't find registers\n"); + return; + } + + aml_parse_resource(&res, bytgpio_parse_resources, sc); + printf(" addr 0x%lx/0x%lx", sc->sc_addr, sc->sc_size); + if (sc->sc_addr == 0 || sc->sc_size == 0) { + printf("\n"); + return; + } + + printf(" irq %d", sc->sc_irq); + + sc->sc_memt = aaa->aaa_memt; + if (bus_space_map(sc->sc_memt, sc->sc_addr, sc->sc_size, 0, + &sc->sc_memh)) { + printf(", can't map registers\n"); + return; + } + +#if 0 + sc->sc_ih = acpi_intr_establish(sc->sc_irq, sc->sc_irq_flags, IPL_BIO, + bytgpio_intr, sc, sc->sc_dev.dv_xname); + if (sc->sc_ih == NULL) { + printf(", can't establish interrupt\n"); + return; + } +#endif + + sc->sc_gpio.cookie = sc; + sc->sc_gpio.read_pin = bytgpio_read_pin; + sc->sc_node->gpio = &sc->sc_gpio; + + printf(", %d pins\n", sc->sc_npins); +} + +int +bytgpio_parse_resources(union acpi_resource *crs, void *arg) +{ + struct bytgpio_softc *sc = arg; + int type = AML_CRSTYPE(crs); + + switch (type) { + case LR_MEM32FIXED: + sc->sc_addr = crs->lr_m32fixed._bas; + sc->sc_size = crs->lr_m32fixed._len; + break; + case LR_EXTIRQ: + sc->sc_irq = crs->lr_extirq.irq[0]; + sc->sc_irq_flags = crs->lr_extirq.flags; + break; + default: + printf(" type 0x%x\n", type); + break; + } + + return 0; +} + +int +bytgpio_read_pin(void *cookie, int pin) +{ + struct bytgpio_softc *sc = cookie; + uint32_t reg; + + reg = bus_space_read_4(sc->sc_memt, sc->sc_memh, sc->sc_pins[pin] * 16 + 8); + return (reg & BYTGPIO_PAD_VAL); +} + +#if 0 + +int +bytgpio_intr(void *arg) +{ + struct bytgpio_softc *sc = arg; + uint32_t reg; + int pin; + + for (pin = 0; pin < sc->sc_npins; pin++) { + if (pin % 32 == 0) + reg = bus_space_read_4(sc->sc_memt, sc->sc_memh, 0x800 + (pin / 8)); + if (reg & (1 << (pin % 32))) { + + } + } + + printf("%s\n", __func__); + return 1; +} + +#endif diff --git a/sys/dev/acpi/files.acpi b/sys/dev/acpi/files.acpi index 4cad71a0730..846d7c797aa 100644 --- a/sys/dev/acpi/files.acpi +++ b/sys/dev/acpi/files.acpi @@ -1,4 +1,4 @@ -# $OpenBSD: files.acpi,v 1.30 2016/01/12 01:11:15 jcs Exp $ +# $OpenBSD: files.acpi,v 1.31 2016/03/28 17:29:11 kettenis Exp $ # # Config file and device description for machine-independent ACPI code. # Included by ports that need it. @@ -112,6 +112,11 @@ device aibs attach aibs at acpi file dev/acpi/atk0110.c aibs +# Intel Bay Trail GPIO +device bytgpio +attach bytgpio at acpi +file dev/acpi/bytgpio.c bytgpio + # SD Host Controller attach sdhc at acpi with sdhc_acpi file dev/acpi/sdhc_acpi.c sdhc_acpi |