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Diffstat (limited to 'sys/dev/uart/uart_cpu_sparc64.c')
-rw-r--r--sys/dev/uart/uart_cpu_sparc64.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_cpu_sparc64.c b/sys/dev/uart/uart_cpu_sparc64.c
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index 000000000000..efe0283df204
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+++ b/sys/dev/uart/uart_cpu_sparc64.c
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+/*-
+ * Copyright (c) 2003, 2004 Marcel Moolenaar
+ * Copyright (c) 2004 - 2006 Marius Strobl <marius@FreeBSD.org>
+ * 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>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+
+#include <machine/bus.h>
+#include <machine/bus_private.h>
+
+#include <dev/ofw/openfirm.h>
+#include <machine/ofw_machdep.h>
+
+#include <dev/uart/uart.h>
+#include <dev/uart/uart_cpu.h>
+
+bus_space_tag_t uart_bus_space_io;
+bus_space_tag_t uart_bus_space_mem;
+
+static struct bus_space_tag bst_store[3];
+
+/*
+ * Determine which channel of a SCC a device referenced by a full device
+ * path or as an alias is (in the latter case we try to look up the device
+ * path via the /aliases node).
+ * Only the device paths of devices which are used for TTYs really allow
+ * to do this as they look like these (taken from /aliases nodes):
+ * ttya: '/central/fhc/zs@0,902000:a'
+ * ttyc: '/pci@1f,0/pci@1,1/ebus@1/se@14,400000:a'
+ * Additionally, for device paths of SCCs which are connected to a RSC
+ * (Remote System Control) device we can hardcode the appropriate channel.
+ * Such device paths look like these:
+ * rsc: '/pci@1f,4000/ebus@1/se@14,200000:ssp'
+ * ttyc: '/pci@1f,4000/ebus@1/se@14,200000:ssp'
+ */
+static int
+uart_cpu_channel(char *dev)
+{
+ char alias[64];
+ phandle_t aliases;
+ int len;
+ const char *p;
+
+ strcpy(alias, dev);
+ if ((aliases = OF_finddevice("/aliases")) != -1)
+ (void)OF_getprop(aliases, dev, alias, sizeof(alias));
+ len = strlen(alias);
+ if ((p = rindex(alias, ':')) == NULL)
+ return (0);
+ p++;
+ if (p - alias == len - 1 && (*p == 'a' || *p == 'b'))
+ return (*p - 'a' + 1);
+ if (strcmp(p, "ssp") == 0)
+ return (1);
+ return (0);
+}
+
+int
+uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
+{
+
+ return ((b1->bsh == b2->bsh) ? 1 : 0);
+}
+
+/*
+ * Get the package handle of the UART that is selected as the console, if
+ * the console is an UART of course. Note that we enforce that both input
+ * and output are selected.
+ * Note that the currently active console (i.e. /chosen/stdout and
+ * /chosen/stdin) may not be the same as the device selected in the
+ * environment (ie /options/output-device and /options/input-device) because
+ * keyboard and screen were selected but the keyboard was unplugged or the
+ * user has changed the environment. In the latter case I would assume that
+ * the user expects that FreeBSD uses the new console setting.
+ * For weirder configurations, use ofw_console(4).
+ */
+static phandle_t
+uart_cpu_getdev_console(phandle_t options, char *dev, size_t devsz)
+{
+ char buf[sizeof("serial")];
+ ihandle_t inst;
+ phandle_t chosen, input, output;
+
+ if (OF_getprop(options, "input-device", dev, devsz) == -1)
+ return (-1);
+ input = OF_finddevice(dev);
+ if (OF_getprop(options, "output-device", dev, devsz) == -1)
+ return (-1);
+ output = OF_finddevice(dev);
+ if (input == -1 || output == -1 ||
+ OF_getproplen(input, "keyboard") >= 0) {
+ if ((chosen = OF_finddevice("/chosen")) == -1)
+ return (-1);
+ if (OF_getprop(chosen, "stdin", &inst, sizeof(inst)) == -1)
+ return (-1);
+ if ((input = OF_instance_to_package(inst)) == -1)
+ return (-1);
+ if (OF_getprop(chosen, "stdout", &inst, sizeof(inst)) == -1)
+ return (-1);
+ if ((output = OF_instance_to_package(inst)) == -1)
+ return (-1);
+ snprintf(dev, devsz, "ttya");
+ }
+ if (input != output)
+ return (-1);
+ if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
+ return (-1);
+ if (strcmp(buf, "serial") != 0)
+ return (-1);
+ return (input);
+}
+
+/*
+ * Get the package handle of the UART that's selected as the debug port.
+ * Since there's no place for this in the OF, we use the kernel environment
+ * variable "hw.uart.dbgport". Note however that the variable is not a
+ * list of attributes. It's single device name or alias, as known by
+ * the OF.
+ */
+static phandle_t
+uart_cpu_getdev_dbgport(char *dev, size_t devsz)
+{
+ char buf[sizeof("serial")];
+ phandle_t input;
+
+ if (!getenv_string("hw.uart.dbgport", dev, devsz))
+ return (-1);
+ if ((input = OF_finddevice(dev)) == -1)
+ return (-1);
+ if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
+ return (-1);
+ if (strcmp(buf, "serial") != 0)
+ return (-1);
+ return (input);
+}
+
+/*
+ * Get the package handle of the UART that is selected as the keyboard port,
+ * if it's actually used to connect the keyboard according to the OF. I.e.
+ * this will return the UART used to connect the keyboard regardless whether
+ * it's stdin or not, however not in case the user or the OF gave preference
+ * to e.g. a PS/2 keyboard by setting /aliases/keyboard accordingly.
+ */
+static phandle_t
+uart_cpu_getdev_keyboard(char *dev, size_t devsz)
+{
+ char buf[sizeof("serial")];
+ phandle_t input;
+
+ if ((input = OF_finddevice("keyboard")) == -1)
+ return (-1);
+ if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
+ return (-1);
+ if (strcmp(buf, "serial") != 0)
+ return (-1);
+ if (OF_getprop(input, "name", dev, devsz) == -1)
+ return (-1);
+ /*
+ * So far this also matched PS/2 keyboard nodes so make sure it's
+ * one of the SCCs/UARTs known to be used to connect keyboards.
+ */
+ if (strcmp(dev, "su") && strcmp(dev, "su_pnp") && strcmp(dev, "zs"))
+ return (-1);
+ return (input);
+}
+
+int
+uart_cpu_getdev(int devtype, struct uart_devinfo *di)
+{
+ char buf[32], compat[32], dev[64];
+ phandle_t input, options;
+ bus_addr_t addr;
+ int baud, bits, error, space, stop;
+ char flag, par;
+
+ if ((options = OF_finddevice("/options")) == -1)
+ return (ENXIO);
+ switch (devtype) {
+ case UART_DEV_CONSOLE:
+ input = uart_cpu_getdev_console(options, dev, sizeof(dev));
+ break;
+ case UART_DEV_DBGPORT:
+ input = uart_cpu_getdev_dbgport(dev, sizeof(dev));
+ break;
+ case UART_DEV_KEYBOARD:
+ input = uart_cpu_getdev_keyboard(dev, sizeof(dev));
+ break;
+ default:
+ input = -1;
+ break;
+ }
+ if (input == -1)
+ return (ENXIO);
+ error = OF_decode_addr(input, 0, &space, &addr);
+ if (error)
+ return (error);
+
+ /* Get the device class. */
+ if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
+ return (ENXIO);
+ if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1)
+ compat[0] = '\0';
+ di->bas.regshft = 0;
+ di->bas.rclk = 0;
+ if (!strcmp(buf, "se") || !strcmp(compat, "sab82532")) {
+ di->ops = uart_sab82532_ops;
+ /* SAB82532 are only known to be used for TTYs. */
+ if ((di->bas.chan = uart_cpu_channel(dev)) == 0)
+ return (ENXIO);
+ addr += 64 * (di->bas.chan - 1);
+ } else if (!strcmp(buf, "zs")) {
+ di->ops = uart_z8530_ops;
+ if ((di->bas.chan = uart_cpu_channel(dev)) == 0) {
+ /*
+ * There's no way to determine from OF which
+ * channel has the keyboard. Should always be
+ * on channel 1 however.
+ */
+ if (devtype == UART_DEV_KEYBOARD)
+ di->bas.chan = 1;
+ else
+ return (ENXIO);
+ }
+ di->bas.regshft = 1;
+ addr += 4 - 4 * (di->bas.chan - 1);
+ } else if (!strcmp(buf, "lom-console") || !strcmp(buf, "su") ||
+ !strcmp(buf, "su_pnp") || !strcmp(compat, "rsc-console") ||
+ !strcmp(compat, "su") || !strcmp(compat, "su16550")) {
+ di->ops = uart_ns8250_ops;
+ di->bas.chan = 0;
+ } else
+ return (ENXIO);
+
+ /* Fill in the device info. */
+ di->bas.bst = &bst_store[devtype];
+ di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst);
+
+ /* Get the line settings. */
+ if (devtype == UART_DEV_KEYBOARD)
+ di->baudrate = 1200;
+ else if (!strcmp(compat, "rsc-console"))
+ di->baudrate = 115200;
+ else
+ di->baudrate = 9600;
+ di->databits = 8;
+ di->stopbits = 1;
+ di->parity = UART_PARITY_NONE;
+ snprintf(buf, sizeof(buf), "%s-mode", dev);
+ if (OF_getprop(options, buf, buf, sizeof(buf)) == -1 &&
+ OF_getprop(input, "ssp-console-modes", buf, sizeof(buf)) == -1)
+ return (0);
+ if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag)
+ != 5)
+ return (0);
+ di->baudrate = baud;
+ di->databits = bits;
+ di->stopbits = stop;
+ di->parity = (par == 'n') ? UART_PARITY_NONE :
+ (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN;
+ return (0);
+}
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