Date: Fri, 3 Apr 2020 20:45:16 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359614 - in head/sys: conf powerpc/amigaone Message-ID: <202004032045.033KjGcL050020@repo.freebsd.org>
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Author: jhibbits Date: Fri Apr 3 20:45:16 2020 New Revision: 359614 URL: https://svnweb.freebsd.org/changeset/base/359614 Log: powerpc/amigaone: Add CPLD driver for AmigaOne A1222 "Tabor" Like the X5000, the main CPLD on the A1222 is the communication medium between the CPU and the GPIO CPLD. It provides a mailbox communication feature, along with dual-port RAM accessible from both the CPU and GPIO CPLD, and 3 fan speed reporting registers. Added: head/sys/powerpc/amigaone/cpld_a1222.c (contents, props changed) Modified: head/sys/conf/files.powerpc Modified: head/sys/conf/files.powerpc ============================================================================== --- head/sys/conf/files.powerpc Fri Apr 3 20:43:25 2020 (r359613) +++ head/sys/conf/files.powerpc Fri Apr 3 20:45:16 2020 (r359614) @@ -140,7 +140,8 @@ powerpc/aim/moea64_native.c optional aim powerpc/aim/mp_cpudep.c optional aim powerpc/aim/slb.c optional aim powerpc64 powerpc/amigaone/platform_amigaone.c optional amigaone -powerpc/amigaone/cpld_x5000.c optional powerpc amigaone | powerpc64 amigaone +powerpc/amigaone/cpld_a1222.c optional powerpc amigaone | powerpcspe amigaone +powerpc/amigaone/cpld_x5000.c optional powerpc amigaone | powerpc64 amigaone powerpc/booke/locore.S optional booke no-obj powerpc/booke/booke_machdep.c optional booke powerpc/booke/machdep_e500.c optional booke_e500 Added: head/sys/powerpc/amigaone/cpld_a1222.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/powerpc/amigaone/cpld_a1222.c Fri Apr 3 20:45:16 2020 (r359614) @@ -0,0 +1,401 @@ +/*- + * Copyright (c) 2020 Justin Hibbits + * + * 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> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/bus.h> +#include <sys/limits.h> +#include <sys/module.h> +#include <sys/malloc.h> +#include <sys/mutex.h> +#include <sys/rman.h> +#include <sys/sysctl.h> + +#include <machine/bus.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <sys/kdb.h> + +#include "cpld.h" + +/* + * A driver for the AmigaOne A1222 "Tabor" Main CPLD. + * + * The main CPLD is the interface between the CPU and the GPIO CPLD. + * Communication with the GPIO CPLD is over the main CPLD's mailbox interface, + * along with the dual-port RAM on the CPLD. + * + * Only one process can open the CPLD character device at a time. The driver + * enforces this to simplify the communication protocol. + */ + +/* Resource access addresses. */ +#define CPLD_MEM_ADDR_H 0x00 +#define CPLD_MEM_ADDR_L 0x01 +#define CPLD_MEM_DATA 0x80 + +#define CPLD_MAX_DRAM_WORDS 0x800 + +/* CPLD Registers. */ +#define CPLD_REG_SIG1 0x00 +#define CPLD_REG_SIG2 0x01 +#define CPLD_REG_HWREV 0x02 +#define CPLD_REG_CPLDREV 0x03 +#define CPLD_REG_MBC2X 0x04 +#define CPLD_REG_MBX2C 0x05 +#define CPLD_REG_FAN1_TACHO_U 0x10 +#define CPLD_REG_FAN1_TACHO_L 0x11 +#define CPLD_REG_FAN2_TACHO_U 0x12 +#define CPLD_REG_FAN2_TACHO_L 0x13 +#define CPLD_REG_FAN3_TACHO_U 0x14 +#define CPLD_REG_FAN3_TACHO_L 0x15 +#define CPLD_REG_DATE_UU 0x20 +#define CPLD_REG_DATE_UL 0x21 +#define CPLD_REG_DATE_LU 0x22 +#define CPLD_REG_DATE_LL 0x23 +#define CPLD_REG_TIME_UU 0x24 +#define CPLD_REG_TIME_UL 0x25 +#define CPLD_REG_TIME_LU 0x26 +#define CPLD_REG_TIME_LL 0x27 +#define CPLD_REG_SCR1 0x5c +#define CPLD_REG_SCR2 0x6a +#define CPLD_REG_RAM 0x80 + +struct cpld_softc { + device_t sc_dev; + struct resource *sc_mem; + struct cdev *sc_cdev; + struct mtx sc_mutex; + bool sc_isopen; +}; + +static d_open_t cpld_open; +static d_close_t cpld_close; +static d_ioctl_t cpld_ioctl; + +static struct cdevsw cpld_cdevsw = { + .d_version = D_VERSION, + .d_open = cpld_open, + .d_close = cpld_close, + .d_ioctl = cpld_ioctl, + .d_name = "nvram", +}; + +static device_probe_t cpld_probe; +static device_attach_t cpld_attach; +static int cpld_fan_sysctl(SYSCTL_HANDLER_ARGS); + +static device_method_t cpld_methods[] = { + DEVMETHOD(device_probe, cpld_probe), + DEVMETHOD(device_attach, cpld_attach), + + DEVMETHOD_END +}; + +static driver_t cpld_driver = { + "cpld", + cpld_methods, + sizeof(struct cpld_softc) +}; + +static devclass_t cpld_devclass; +DRIVER_MODULE(cpld, lbc, cpld_driver, cpld_devclass, 0, 0); + +static void +cpld_write(struct cpld_softc *sc, int addr, int data) +{ + if (addr >= CPLD_REG_RAM) { + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_H, addr); + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_L, addr); + } else + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_H, addr); + bus_write_1(sc->sc_mem, CPLD_MEM_DATA, data); +} + +static int +cpld_read(struct cpld_softc *sc, int addr) +{ + if (addr >= CPLD_REG_RAM) { + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_H, addr); + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_L, addr); + } else + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_H, addr); + + return (bus_read_1(sc->sc_mem, CPLD_MEM_DATA)); +} + +/* + * This is only to read a register that's split into two 8-bit registers. + * Dual-port RAM is not accepted for this purpose. + */ +static int +cpld_read_pair(struct cpld_softc *sc, int addr) +{ + int tmp; + + KASSERT(addr <= 0xff, ("Invalid register-pair base address %x.", addr)); + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_H, addr); + tmp = bus_read_1(sc->sc_mem, CPLD_MEM_DATA) << 8; + + bus_write_1(sc->sc_mem, CPLD_MEM_ADDR_H, addr + 1); + tmp |= bus_read_1(sc->sc_mem, CPLD_MEM_DATA); + + return (tmp); +} + +static int +cpld_probe(device_t dev) +{ + if (!ofw_bus_is_compatible(dev, "aeon,tabor-cpld")) + return (ENXIO); + + device_set_desc(dev, "AmigaOne Tabor CPLD"); + + return (BUS_PROBE_GENERIC); +} + +static int +cpld_attach(device_t dev) +{ + struct make_dev_args mda; + struct cpld_softc *sc; + int rid; + int date, time, tmp; + int err; + struct sysctl_ctx_list *ctx; + struct sysctl_oid *tree; + + sc = device_get_softc(dev); + sc->sc_dev = dev; + + rid = 0; + sc->sc_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE|RF_SHAREABLE); + if (sc->sc_mem == NULL) { + device_printf(dev, "Unable to allocate memory resource.\n"); + return (ENXIO); + } + mtx_init(&sc->sc_mutex, "cpld", NULL, MTX_DEF); + + if (bootverbose) { + date = (cpld_read_pair(sc, CPLD_REG_DATE_UU) << 16) | + cpld_read_pair(sc, CPLD_REG_DATE_LU); + time = (cpld_read_pair(sc, CPLD_REG_TIME_UU) << 16) | + cpld_read_pair(sc, CPLD_REG_TIME_LU); + + device_printf(dev, "Build date: %04x-%02x-%02x\n", + (date >> 16) & 0xffff, (date >> 8) & 0xff, date & 0xff); +#if 0 + /* Build time is nonsense on tested system. */ + device_printf(dev, "Build time: %02x:%02x:%02x\n", + (time >> 16) & 0xff, (time >> 8) & 0xff, time & 0xff); +#endif + } + + tmp = cpld_read(sc, CPLD_REG_HWREV); + device_printf(dev, "Hardware revision: %d\n", tmp); + + ctx = device_get_sysctl_ctx(dev); + tree = device_get_sysctl_tree(dev); + + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "cpu_fan", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, + CPLD_REG_FAN1_TACHO_U, cpld_fan_sysctl, "I", + "CPU Fan speed in RPM"); + + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "case_1_fan", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, + CPLD_REG_FAN2_TACHO_U, cpld_fan_sysctl, "I", + "Case fan 1 speed in RPM"); + + SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, + "case_2_fan", CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, + CPLD_REG_FAN3_TACHO_U, cpld_fan_sysctl, "I", + "Case fan 2 speed in RPM"); + + make_dev_args_init(&mda); + mda.mda_flags = MAKEDEV_CHECKNAME; + mda.mda_devsw = &cpld_cdevsw; + mda.mda_uid = UID_ROOT; + mda.mda_gid = GID_WHEEL; + mda.mda_mode = 0660; + err = make_dev_s(&mda, &sc->sc_cdev, "cpld"); + if (err != 0) { + device_printf(dev, "Error creating character device: %d\n", err); + device_printf(dev, "Only sysctl interfaces will be available.\n"); + } + + return (0); +} + +static int +cpld_fan_sysctl(SYSCTL_HANDLER_ARGS) +{ + struct cpld_softc *sc; + int error, old, rpm; + int fan_reg; + + sc = arg1; + fan_reg = arg2; + mtx_lock(&sc->sc_mutex); + /* Read until we get some level of read stability. */ + rpm = cpld_read(sc, fan_reg); + do { + old = rpm; + rpm = cpld_read_pair(sc, fan_reg); + } while (abs(rpm - old) > 10); + mtx_unlock(&sc->sc_mutex); + + /* Convert RPS->RPM. */ + rpm *= 60; + error = sysctl_handle_int(oidp, &rpm, 0, req); + + return (error); +} + +static int +cpld_open(struct cdev *dev, int flags, int fmt, struct thread *td) +{ + struct cpld_softc *sc = dev->si_drv1; + + if (sc->sc_isopen) + return (EBUSY); + sc->sc_isopen = 1; + return (0); +} + +static int +cpld_close(struct cdev *dev, int fflag, int devtype, struct thread *td) +{ + struct cpld_softc *sc = dev->si_drv1; + + sc->sc_isopen = 0; + return (0); +} + +/* + * Send a command over the CPLD to the other side. + * + * This will first copy the data into the dual-port RAM, then signal the other + * side by writing to the mailbox. + */ +static int +cpld_send(device_t dev, struct cpld_cmd_data *d) +{ + struct cpld_softc *sc; + uint16_t *word; + int i; + + if (d->cmd > USHRT_MAX) + return (EINVAL); + + sc = device_get_softc(dev); + + mtx_lock(&sc->sc_mutex); + for (i = 0, word = d->words; i < d->len; i++, word++) { + if (i == 0) + cpld_write(sc, CPLD_REG_RAM + d->offset, *word); + else + bus_write_4(sc->sc_mem, CPLD_MEM_DATA, *word); + } + + cpld_write(sc, CPLD_REG_MBC2X, d->cmd); + mtx_unlock(&sc->sc_mutex); + + return (0); +} + +static int +cpld_recv(device_t dev, struct cpld_cmd_data *d) +{ + struct cpld_softc *sc; + uint16_t *word; + int i; + + sc = device_get_softc(dev); + + mtx_lock(&sc->sc_mutex); + d->cmd = cpld_read(sc, CPLD_REG_MBX2C); + + for (i = 0, word = d->words; i < d->len; i++, word++) { + if (i == 0) + *word = cpld_read(sc, CPLD_REG_RAM + d->offset); + else + *word = bus_read_4(sc->sc_mem, CPLD_MEM_DATA); + } + mtx_unlock(&sc->sc_mutex); + + return (0); +} + +static int +cpld_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, + struct thread *td) +{ + struct cpld_softc *sc; + struct cpld_cmd_data *d; + void *xfer_data, *tmp; + int err; + + sc = dev->si_drv1; + + err = 0; + d = (struct cpld_cmd_data *)data; + if (d->len + d->offset > CPLD_MAX_DRAM_WORDS) { + return (EINVAL); + } + xfer_data = malloc(d->len * sizeof(uint16_t), M_TEMP, M_WAITOK); + + switch (cmd) { + case IOCCPLDSEND: + err = copyin(d->words, xfer_data, d->len * sizeof(uint16_t)); + d->words = xfer_data; + if (err == 0) + err = cpld_send(sc->sc_dev, d); + break; + case IOCCPLDRECV: + tmp = d->words; + d->words = xfer_data; + err = cpld_recv(sc->sc_dev, d); + d->words = tmp; + if (err == 0) + err = copyout(xfer_data, d->words, + d->len * sizeof(uint16_t)); + break; + default: + err = ENOTTY; + break; + } + free(xfer_data, M_TEMP); + + return (err); +}
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