96deb1fcf0
OF_getprop() to get encode-int encoded values from the OF tree. This is a no-op at present, since all existing PowerPC ports are big-endian, but it is a correctness improvement and will be required if we have a little-endian kernel at some future point. Where it is totally impossible for the code ever to be used on a little-endian system (much of powerpc/powermac, for instance), I have not necessarily made the appropriate changes. MFC after: 1 month
434 lines
9.5 KiB
C
434 lines
9.5 KiB
C
/*-
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* Copyright (C) 2011 by Nathan Whitehorn. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kdb.h>
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#include <sys/kernel.h>
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#include <sys/priv.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/tty.h>
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#include <machine/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_cpu.h>
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#include <dev/uart/uart_bus.h>
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#include "phyp-hvcall.h"
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#include "uart_if.h"
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struct uart_phyp_softc {
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device_t dev;
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phandle_t node;
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int vtermid;
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struct tty *tp;
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struct resource *irqres;
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int irqrid;
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struct callout callout;
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void *sc_icookie;
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int polltime;
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struct mtx sc_mtx;
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int protocol;
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union {
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uint64_t u64[2];
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char str[16];
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} phyp_inbuf;
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uint64_t inbuflen;
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uint8_t outseqno;
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};
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static struct uart_phyp_softc *console_sc = NULL;
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#if defined(KDB)
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static int alt_break_state;
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#endif
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enum {
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HVTERM1, HVTERMPROT
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};
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#define VS_DATA_PACKET_HEADER 0xff
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#define VS_CONTROL_PACKET_HEADER 0xfe
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#define VSV_SET_MODEM_CTL 0x01
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#define VSV_MODEM_CTL_UPDATE 0x02
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#define VSV_RENEGOTIATE_CONNECTION 0x03
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#define VS_QUERY_PACKET_HEADER 0xfd
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#define VSV_SEND_VERSION_NUMBER 0x01
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#define VSV_SEND_MODEM_CTL_STATUS 0x02
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#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
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static int uart_phyp_probe(device_t dev);
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static int uart_phyp_attach(device_t dev);
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static void uart_phyp_intr(void *v);
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static device_method_t uart_phyp_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, uart_phyp_probe),
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DEVMETHOD(device_attach, uart_phyp_attach),
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DEVMETHOD_END
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};
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static driver_t uart_phyp_driver = {
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"uart",
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uart_phyp_methods,
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sizeof(struct uart_phyp_softc),
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};
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DRIVER_MODULE(uart_phyp, vdevice, uart_phyp_driver, uart_devclass, 0, 0);
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static cn_probe_t uart_phyp_cnprobe;
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static cn_init_t uart_phyp_cninit;
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static cn_term_t uart_phyp_cnterm;
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static cn_getc_t uart_phyp_cngetc;
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static cn_putc_t uart_phyp_cnputc;
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static cn_grab_t uart_phyp_cngrab;
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static cn_ungrab_t uart_phyp_cnungrab;
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CONSOLE_DRIVER(uart_phyp);
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static void uart_phyp_ttyoutwakeup(struct tty *tp);
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static struct ttydevsw uart_phyp_tty_class = {
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.tsw_flags = TF_INITLOCK|TF_CALLOUT,
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.tsw_outwakeup = uart_phyp_ttyoutwakeup,
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};
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static int
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uart_phyp_probe_node(struct uart_phyp_softc *sc)
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{
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phandle_t node = sc->node;
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uint32_t reg;
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char buf[64];
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sc->inbuflen = 0;
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sc->outseqno = 0;
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if (OF_getprop(node, "name", buf, sizeof(buf)) <= 0)
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return (ENXIO);
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if (strcmp(buf, "vty") != 0)
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return (ENXIO);
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if (OF_getprop(node, "device_type", buf, sizeof(buf)) <= 0)
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return (ENXIO);
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if (strcmp(buf, "serial") != 0)
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return (ENXIO);
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reg = -1;
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OF_getencprop(node, "reg", ®, sizeof(reg));
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if (reg == -1)
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return (ENXIO);
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sc->vtermid = reg;
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sc->node = node;
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if (OF_getprop(node, "compatible", buf, sizeof(buf)) <= 0)
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return (ENXIO);
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if (strcmp(buf, "hvterm1") == 0) {
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sc->protocol = HVTERM1;
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return (0);
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} else if (strcmp(buf, "hvterm-protocol") == 0) {
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sc->protocol = HVTERMPROT;
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return (0);
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}
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return (ENXIO);
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}
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static int
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uart_phyp_probe(device_t dev)
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{
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const char *name;
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struct uart_phyp_softc sc;
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int err;
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name = ofw_bus_get_name(dev);
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if (name == NULL || strcmp(name, "vty") != 0)
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return (ENXIO);
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sc.node = ofw_bus_get_node(dev);
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err = uart_phyp_probe_node(&sc);
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if (err != 0)
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return (err);
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device_set_desc(dev, "POWER Hypervisor Virtual Serial Port");
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return (err);
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}
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static void
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uart_phyp_cnprobe(struct consdev *cp)
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{
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char buf[64];
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ihandle_t stdout;
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phandle_t input, chosen;
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static struct uart_phyp_softc sc;
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if ((chosen = OF_finddevice("/chosen")) == -1)
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goto fail;
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/* Check if OF has an active stdin/stdout */
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input = -1;
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if (OF_getencprop(chosen, "stdout", &stdout,
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sizeof(stdout)) == sizeof(stdout) && stdout != 0)
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input = OF_instance_to_package(stdout);
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if (input == -1)
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goto fail;
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if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
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goto fail;
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if (strcmp(buf, "serial") != 0)
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goto fail;
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sc.node = input;
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if (uart_phyp_probe_node(&sc) != 0)
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goto fail;
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mtx_init(&sc.sc_mtx, "uart_phyp", NULL, MTX_SPIN | MTX_QUIET |
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MTX_NOWITNESS);
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cp->cn_pri = CN_NORMAL;
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console_sc = ≻
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return;
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fail:
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cp->cn_pri = CN_DEAD;
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return;
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}
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static int
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uart_phyp_attach(device_t dev)
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{
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struct uart_phyp_softc *sc;
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int unit;
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sc = device_get_softc(dev);
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sc->dev = dev;
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sc->node = ofw_bus_get_node(dev);
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uart_phyp_probe_node(sc);
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unit = device_get_unit(dev);
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sc->tp = tty_alloc(&uart_phyp_tty_class, sc);
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mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL,
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MTX_SPIN | MTX_QUIET | MTX_NOWITNESS);
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if (console_sc != NULL && console_sc->vtermid == sc->vtermid) {
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sc->outseqno = console_sc->outseqno;
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console_sc = sc;
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sprintf(uart_phyp_consdev.cn_name, "ttyu%r", unit);
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tty_init_console(sc->tp, 0);
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}
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sc->irqrid = 0;
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sc->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqrid,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->irqres != NULL) {
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bus_setup_intr(dev, sc->irqres, INTR_TYPE_TTY | INTR_MPSAFE,
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NULL, uart_phyp_intr, sc, &sc->sc_icookie);
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} else {
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callout_init(&sc->callout, 1);
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sc->polltime = hz / 20;
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if (sc->polltime < 1)
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sc->polltime = 1;
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callout_reset(&sc->callout, sc->polltime, uart_phyp_intr, sc);
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}
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tty_makedev(sc->tp, NULL, "u%r", unit);
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return (0);
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}
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static void
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uart_phyp_cninit(struct consdev *cp)
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{
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strcpy(cp->cn_name, "phypcons");
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}
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static void
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uart_phyp_cnterm(struct consdev *cp)
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{
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}
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static int
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uart_phyp_get(struct uart_phyp_softc *sc, void *buffer, size_t bufsize)
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{
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int err;
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int hdr = 0;
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uart_lock(&sc->sc_mtx);
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if (sc->inbuflen == 0) {
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err = phyp_pft_hcall(H_GET_TERM_CHAR, sc->vtermid,
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0, 0, 0, &sc->inbuflen, &sc->phyp_inbuf.u64[0],
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&sc->phyp_inbuf.u64[1]);
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if (err != H_SUCCESS) {
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uart_unlock(&sc->sc_mtx);
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return (-1);
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}
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hdr = 1;
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}
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if (sc->inbuflen == 0) {
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uart_unlock(&sc->sc_mtx);
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return (0);
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}
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if (bufsize > sc->inbuflen)
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bufsize = sc->inbuflen;
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if ((sc->protocol == HVTERMPROT) && (hdr == 1)) {
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sc->inbuflen = sc->inbuflen - 4;
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/* The VTERM protocol has a 4 byte header, skip it here. */
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memmove(&sc->phyp_inbuf.str[0], &sc->phyp_inbuf.str[4],
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sc->inbuflen);
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}
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memcpy(buffer, sc->phyp_inbuf.str, bufsize);
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sc->inbuflen -= bufsize;
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if (sc->inbuflen > 0)
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memmove(&sc->phyp_inbuf.str[0], &sc->phyp_inbuf.str[bufsize],
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sc->inbuflen);
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uart_unlock(&sc->sc_mtx);
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return (bufsize);
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}
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static int
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uart_phyp_put(struct uart_phyp_softc *sc, void *buffer, size_t bufsize)
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{
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uint16_t seqno;
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uint64_t len = 0;
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int err;
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union {
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uint64_t u64[2];
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char bytes[16];
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} cbuf;
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uart_lock(&sc->sc_mtx);
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switch (sc->protocol) {
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case HVTERM1:
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if (bufsize > 16)
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bufsize = 16;
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memcpy(&cbuf, buffer, bufsize);
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len = bufsize;
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break;
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case HVTERMPROT:
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if (bufsize > 12)
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bufsize = 12;
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seqno = sc->outseqno++;
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cbuf.bytes[0] = VS_DATA_PACKET_HEADER;
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cbuf.bytes[1] = 4 + bufsize; /* total length, max 16 bytes */
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cbuf.bytes[2] = (seqno >> 8) & 0xff;
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cbuf.bytes[3] = seqno & 0xff;
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memcpy(&cbuf.bytes[4], buffer, bufsize);
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len = 4 + bufsize;
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break;
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}
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do {
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err = phyp_hcall(H_PUT_TERM_CHAR, sc->vtermid, len, cbuf.u64[0],
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cbuf.u64[1]);
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DELAY(100);
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} while (err == H_BUSY);
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uart_unlock(&sc->sc_mtx);
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return (bufsize);
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}
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static int
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uart_phyp_cngetc(struct consdev *cp)
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{
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unsigned char c;
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int retval;
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retval = uart_phyp_get(console_sc, &c, 1);
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if (retval != 1)
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return (-1);
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#if defined(KDB)
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kdb_alt_break(c, &alt_break_state);
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#endif
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return (c);
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}
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static void
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uart_phyp_cnputc(struct consdev *cp, int c)
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{
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unsigned char ch = c;
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uart_phyp_put(console_sc, &ch, 1);
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}
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static void
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uart_phyp_cngrab(struct consdev *cp)
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{
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}
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static void
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uart_phyp_cnungrab(struct consdev *cp)
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{
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}
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static void
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uart_phyp_ttyoutwakeup(struct tty *tp)
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{
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struct uart_phyp_softc *sc;
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char buffer[8];
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int len;
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sc = tty_softc(tp);
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while ((len = ttydisc_getc(tp, buffer, sizeof(buffer))) != 0)
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uart_phyp_put(sc, buffer, len);
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}
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static void
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uart_phyp_intr(void *v)
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{
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struct uart_phyp_softc *sc = v;
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struct tty *tp = sc->tp;
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unsigned char c;
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int len;
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tty_lock(tp);
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while ((len = uart_phyp_get(sc, &c, 1)) > 0)
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ttydisc_rint(tp, c, 0);
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ttydisc_rint_done(tp);
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tty_unlock(tp);
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if (sc->irqres == NULL)
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callout_reset(&sc->callout, sc->polltime, uart_phyp_intr, sc);
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}
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