uart_cpu_sparc64.c revision 127825
1119815Smarcel/* 2127215Smarcel * Copyright (c) 2003, 2004 Marcel Moolenaar 3119815Smarcel * All rights reserved. 4119815Smarcel * 5119815Smarcel * Redistribution and use in source and binary forms, with or without 6119815Smarcel * modification, are permitted provided that the following conditions 7119815Smarcel * are met: 8119815Smarcel * 9119815Smarcel * 1. Redistributions of source code must retain the above copyright 10119815Smarcel * notice, this list of conditions and the following disclaimer. 11119815Smarcel * 2. Redistributions in binary form must reproduce the above copyright 12119815Smarcel * notice, this list of conditions and the following disclaimer in the 13119815Smarcel * documentation and/or other materials provided with the distribution. 14119815Smarcel * 15119815Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16119815Smarcel * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17119815Smarcel * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18119815Smarcel * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19119815Smarcel * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20119815Smarcel * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21119815Smarcel * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22119815Smarcel * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23119815Smarcel * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24119815Smarcel * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25119815Smarcel */ 26119815Smarcel 27119815Smarcel#include <sys/cdefs.h> 28119815Smarcel__FBSDID("$FreeBSD: head/sys/dev/uart/uart_cpu_sparc64.c 127825 2004-04-04 05:06:26Z marcel $"); 29119815Smarcel 30119815Smarcel#include <sys/param.h> 31119815Smarcel#include <sys/systm.h> 32119815Smarcel 33119815Smarcel#include <machine/bus.h> 34119815Smarcel#include <machine/bus_private.h> 35119815Smarcel 36119815Smarcel#include <dev/ofw/openfirm.h> 37119815Smarcel#include <machine/ofw_machdep.h> 38119815Smarcel 39119815Smarcel#include <dev/uart/uart.h> 40119815Smarcel#include <dev/uart/uart_cpu.h> 41119815Smarcel 42127215Smarcelbus_space_tag_t uart_bus_space_io; 43127215Smarcelbus_space_tag_t uart_bus_space_mem; 44127215Smarcel 45119815Smarcelstatic struct bus_space_tag bst_store[3]; 46119815Smarcel 47119815Smarcelstatic int 48119815Smarceluart_cpu_channel(char *dev) 49119815Smarcel{ 50119815Smarcel char alias[64]; 51119815Smarcel phandle_t aliases; 52119815Smarcel int len; 53119815Smarcel 54119815Smarcel strcpy(alias, dev); 55119815Smarcel if ((aliases = OF_finddevice("/aliases")) != -1) 56119815Smarcel OF_getprop(aliases, dev, alias, sizeof(alias)); 57119815Smarcel len = strlen(alias); 58119815Smarcel if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' || 59119815Smarcel alias[len - 1] > 'b') 60119815Smarcel return (0); 61120452Smarcel return (alias[len - 1] - 'a' + 1); 62119815Smarcel} 63119815Smarcel 64119815Smarcelint 65119866Smarceluart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 66119866Smarcel{ 67119866Smarcel 68119866Smarcel return ((b1->bsh == b2->bsh) ? 1 : 0); 69119866Smarcel} 70119866Smarcel 71127741Smarcel/* 72127741Smarcel * Get the address of the UART that is selected as the console, if the 73127741Smarcel * console is an UART of course. Note that we enforce that both stdin and 74127825Smarcel * stdout are selected. 75127741Smarcel * Note that the currently active console (i.e. /chosen/stdout and 76127741Smarcel * /chosen/stdin) may not be the same as the device selected in the 77127741Smarcel * environment (ie /options/output-device and /options/input-device) because 78127825Smarcel * keyboard and screen were selected but the keyboard was unplugged or the 79127825Smarcel * user has changed the environment. In the latter case I would assume that 80127825Smarcel * the user expects that FreeBSD uses the new console setting. 81127825Smarcel * For weirder configurations, use ofw_console(4). 82127741Smarcel */ 83122466Sjakestatic phandle_t 84127741Smarceluart_cpu_getdev_console(phandle_t options, char *dev, size_t devsz) 85122466Sjake{ 86122466Sjake char buf[32]; 87127741Smarcel phandle_t input; 88122466Sjake 89127741Smarcel if (OF_getprop(options, "input-device", dev, devsz) == -1) 90127741Smarcel return (-1); 91127741Smarcel if ((input = OF_finddevice(dev)) == -1) 92127741Smarcel return (-1); 93127825Smarcel if (OF_getprop(options, "output-device", buf, sizeof(buf)) == -1) 94127825Smarcel return (-1); 95127825Smarcel if (!strcmp(dev, "keyboard") && !strcmp(buf, "screen")) { 96127825Smarcel phandle_t chosen; 97127825Smarcel ihandle_t stdin, stdout; 98127825Smarcel 99127825Smarcel if ((chosen = OF_finddevice("/chosen")) == -1) 100127825Smarcel return (-1); 101127825Smarcel if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) 102127825Smarcel return (-1); 103127825Smarcel if ((input = OF_instance_to_package(stdin)) == -1) 104127825Smarcel return (-1); 105127825Smarcel if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) 106127825Smarcel return (-1); 107127825Smarcel if (OF_instance_to_package(stdout) != input) 108127825Smarcel return (-1); 109127825Smarcel snprintf(dev, devsz, "ttya"); 110127825Smarcel } else if (OF_finddevice(buf) != input) 111127825Smarcel return (-1); 112127741Smarcel if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 113127741Smarcel return (-1); 114127741Smarcel if (strcmp(buf, "serial") != 0) 115127741Smarcel return (-1); 116127741Smarcel return (input); 117127741Smarcel} 118127741Smarcel 119127741Smarcel/* 120127741Smarcel * Get the address of the UART that's selected as the debug port. Since 121127741Smarcel * there's no place for this in the OF, we use the kernel environment 122127741Smarcel * variable "hw.uart.dbgport". Note however that the variable is not a 123127741Smarcel * list of attributes. It's single device name or alias, as known by 124127741Smarcel * the OF. 125127741Smarcel */ 126127741Smarcelstatic phandle_t 127127741Smarceluart_cpu_getdev_dbgport(phandle_t options, char *dev, size_t devsz) 128127741Smarcel{ 129127741Smarcel char buf[32]; 130127741Smarcel phandle_t input; 131127741Smarcel 132127741Smarcel if (!getenv_string("hw.uart.dbgport", dev, devsz)) 133127741Smarcel return (-1); 134127741Smarcel if ((input = OF_finddevice(dev)) == -1) 135127741Smarcel return (-1); 136127741Smarcel if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1) 137127741Smarcel return (-1); 138127741Smarcel if (strcmp(buf, "serial") != 0) 139127741Smarcel return (-1); 140127741Smarcel return (input); 141127741Smarcel} 142127741Smarcel 143127741Smarcelstatic phandle_t 144127741Smarceluart_cpu_getdev_keyboard(phandle_t root, char *dev, size_t devsz) 145127741Smarcel{ 146127741Smarcel char buf[32]; 147127741Smarcel phandle_t child, node; 148127741Smarcel 149127741Smarcel child = OF_child(root); 150127741Smarcel while (child != 0 && child != -1) { 151122466Sjake if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 && 152122466Sjake !strcmp(buf, "serial") && 153127741Smarcel OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1) { 154127741Smarcel OF_getprop(child, "name", dev, devsz); 155122466Sjake return (child); 156127741Smarcel } 157127741Smarcel if ((node = uart_cpu_getdev_keyboard(child, dev, devsz)) != -1) 158122466Sjake return (node); 159127741Smarcel child = OF_peer(child); 160122466Sjake } 161122466Sjake return (-1); 162122466Sjake} 163122466Sjake 164119866Smarcelint 165119815Smarceluart_cpu_getdev(int devtype, struct uart_devinfo *di) 166119815Smarcel{ 167120009Stmm char buf[32], dev[32], compat[32]; 168127741Smarcel phandle_t input, options; 169119815Smarcel bus_addr_t addr; 170120452Smarcel int baud, bits, error, space, stop; 171119815Smarcel char flag, par; 172119815Smarcel 173127741Smarcel if ((options = OF_finddevice("/options")) == -1) 174127741Smarcel return (ENXIO); 175127741Smarcel switch (devtype) { 176127741Smarcel case UART_DEV_CONSOLE: 177127741Smarcel input = uart_cpu_getdev_console(options, dev, sizeof(dev)); 178127741Smarcel break; 179127741Smarcel case UART_DEV_DBGPORT: 180127741Smarcel input = uart_cpu_getdev_dbgport(options, dev, sizeof(dev)); 181127741Smarcel break; 182127741Smarcel case UART_DEV_KEYBOARD: 183127741Smarcel input = uart_cpu_getdev_keyboard(OF_peer(0), dev, sizeof(dev)); 184127741Smarcel break; 185127741Smarcel default: 186127741Smarcel input = -1; 187127741Smarcel break; 188127741Smarcel } 189127741Smarcel if (input == -1) 190127741Smarcel return (ENXIO); 191119815Smarcel error = OF_decode_addr(input, &space, &addr); 192119815Smarcel if (error) 193119815Smarcel return (error); 194119815Smarcel 195119815Smarcel /* Get the device class. */ 196119815Smarcel if (OF_getprop(input, "name", buf, sizeof(buf)) == -1) 197119815Smarcel return (ENXIO); 198120009Stmm if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1) 199120009Stmm compat[0] = '\0'; 200119815Smarcel di->bas.regshft = 0; 201119815Smarcel di->bas.rclk = 0; 202119815Smarcel if (!strcmp(buf, "se")) { 203119815Smarcel di->ops = uart_sab82532_ops; 204120452Smarcel di->bas.chan = uart_cpu_channel(dev); 205120452Smarcel addr += 64 * (di->bas.chan - 1); 206119815Smarcel } else if (!strcmp(buf, "zs")) { 207119815Smarcel di->ops = uart_z8530_ops; 208120452Smarcel di->bas.chan = uart_cpu_channel(dev); 209119815Smarcel di->bas.regshft = 1; 210120452Smarcel addr += 4 - 4 * (di->bas.chan - 1); 211120009Stmm } else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") || 212120452Smarcel !strcmp(compat, "su") || !strcmp(compat, "su16550")) { 213119815Smarcel di->ops = uart_ns8250_ops; 214120452Smarcel di->bas.chan = 0; 215120452Smarcel } else 216119815Smarcel return (ENXIO); 217119815Smarcel 218119815Smarcel /* Fill in the device info. */ 219119815Smarcel di->bas.bst = &bst_store[devtype]; 220119815Smarcel di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst); 221119815Smarcel 222119815Smarcel /* Get the line settings. */ 223120545Sjake if (devtype == UART_DEV_KEYBOARD) 224120545Sjake di->baudrate = 1200; 225120545Sjake else 226120545Sjake di->baudrate = 9600; 227119815Smarcel di->databits = 8; 228119815Smarcel di->stopbits = 1; 229119815Smarcel di->parity = UART_PARITY_NONE; 230119815Smarcel snprintf(buf, sizeof(buf), "%s-mode", dev); 231119815Smarcel if (OF_getprop(options, buf, buf, sizeof(buf)) == -1) 232119815Smarcel return (0); 233119815Smarcel if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag) 234119815Smarcel != 5) 235119815Smarcel return (0); 236119815Smarcel di->baudrate = baud; 237119815Smarcel di->databits = bits; 238119815Smarcel di->stopbits = stop; 239119815Smarcel di->parity = (par == 'n') ? UART_PARITY_NONE : 240119815Smarcel (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN; 241119815Smarcel return (0); 242119815Smarcel} 243