/*- * Copyright (c) 2003, 2004 Marcel Moolenaar * Copyright (c) 2004 - 2006 Marius Strobl * 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include 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 = strrchr(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); /* For a Serengeti console device point to the bootbus controller. */ if (OF_getprop(input, "name", buf, sizeof(buf)) > 0 && !strcmp(buf, "sgcn")) { if ((chosen = OF_finddevice("/chosen")) == -1) return (-1); if (OF_getprop(chosen, "iosram", &input, sizeof(input)) == -1) 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]; struct uart_class *class; phandle_t input, options; bus_addr_t addr; int baud, bits, error, range, 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; class = NULL; if (!strcmp(buf, "se") || !strcmp(buf, "FJSV,se") || !strcmp(compat, "sab82532")) { class = &uart_sab82532_class; /* SAB82532 are only known to be used for TTYs. */ if ((di->bas.chan = uart_cpu_channel(dev)) == 0) return (ENXIO); addr += uart_getrange(class) * (di->bas.chan - 1); } else if (!strcmp(buf, "zs")) { class = &uart_z8530_class; 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; range = uart_getrange(class) << di->bas.regshft; addr += range - range * (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") || !strcmp(compat, "su16552")) { class = &uart_ns8250_class; di->bas.chan = 0; } else if (!strcmp(compat, "sgsbbc")) { class = &uart_sbbc_class; di->bas.chan = 0; } if (class == NULL) return (ENXIO); /* Fill in the device info. */ di->ops = uart_getops(class); 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); }