1119482Sobrien/*- 238465Smsmith * Copyright (c) 1998 Michael Smith (msmith@freebsd.org) 338465Smsmith * 438465Smsmith * Redistribution and use in source and binary forms, with or without 538465Smsmith * modification, are permitted provided that the following conditions 638465Smsmith * are met: 738465Smsmith * 1. Redistributions of source code must retain the above copyright 838465Smsmith * notice, this list of conditions and the following disclaimer. 938465Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1038465Smsmith * notice, this list of conditions and the following disclaimer in the 1138465Smsmith * documentation and/or other materials provided with the distribution. 1238465Smsmith * 1338465Smsmith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1438465Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1538465Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1638465Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1738465Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1838465Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 1938465Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2038465Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2138465Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2238465Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2338465Smsmith * SUCH DAMAGE. 2438465Smsmith */ 2538465Smsmith 26119482Sobrien#include <sys/cdefs.h> 27119482Sobrien__FBSDID("$FreeBSD$"); 28119482Sobrien 2938465Smsmith#include <stand.h> 3039441Smsmith#include <bootstrap.h> 3141285Srnordier#include <machine/cpufunc.h> 32120118Sbde#include <dev/ic/ns16550.h> 33230257Skib#include <dev/pci/pcireg.h> 3439441Smsmith#include "libi386.h" 3538465Smsmith 3641285Srnordier#define COMC_FMT 0x3 /* 8N1 */ 3741285Srnordier#define COMC_TXWAIT 0x40000 /* transmit timeout */ 3841285Srnordier#define COMC_BPS(x) (115200 / (x)) /* speed to DLAB divisor */ 39149213Siedowse#define COMC_DIV2BPS(x) (115200 / (x)) /* DLAB divisor to speed */ 4041285Srnordier 4142480Srnordier#ifndef COMPORT 4241285Srnordier#define COMPORT 0x3f8 4342480Srnordier#endif 4442480Srnordier#ifndef COMSPEED 4541285Srnordier#define COMSPEED 9600 4642480Srnordier#endif 4741285Srnordier 4838465Smsmithstatic void comc_probe(struct console *cp); 4938465Smsmithstatic int comc_init(int arg); 5039441Smsmithstatic void comc_putchar(int c); 5139441Smsmithstatic int comc_getchar(void); 52149213Siedowsestatic int comc_getspeed(void); 5339441Smsmithstatic int comc_ischar(void); 54230257Skibstatic int comc_parseint(const char *string); 55230257Skibstatic uint32_t comc_parse_pcidev(const char *string); 56230257Skibstatic int comc_pcidev_set(struct env_var *ev, int flags, 57230257Skib const void *value); 58230257Skibstatic int comc_pcidev_handle(uint32_t locator); 59230257Skibstatic int comc_port_set(struct env_var *ev, int flags, 60230257Skib const void *value); 61230257Skibstatic void comc_setup(int speed, int port); 62149213Siedowsestatic int comc_speed_set(struct env_var *ev, int flags, 63149213Siedowse const void *value); 6438465Smsmith 65149213Siedowsestatic int comc_curspeed; 66230257Skibstatic int comc_port = COMPORT; 67230257Skibstatic uint32_t comc_locator; 6840211Speter 6938465Smsmithstruct console comconsole = { 7038465Smsmith "comconsole", 7141285Srnordier "serial port", 7238465Smsmith 0, 7338465Smsmith comc_probe, 7438465Smsmith comc_init, 7539441Smsmith comc_putchar, 7639441Smsmith comc_getchar, 7739441Smsmith comc_ischar 7838465Smsmith}; 7938465Smsmith 8038465Smsmithstatic void 8138465Smsmithcomc_probe(struct console *cp) 8238465Smsmith{ 83230257Skib char intbuf[16]; 84230257Skib char *cons, *env; 85230257Skib int speed, port; 86230257Skib uint32_t locator; 87149213Siedowse 88149213Siedowse if (comc_curspeed == 0) { 89149213Siedowse comc_curspeed = COMSPEED; 90149213Siedowse /* 91149213Siedowse * Assume that the speed was set by an earlier boot loader if 92149213Siedowse * comconsole is already the preferred console. 93149213Siedowse */ 94149213Siedowse cons = getenv("console"); 95149213Siedowse if ((cons != NULL && strcmp(cons, comconsole.c_name) == 0) || 96149213Siedowse getenv("boot_multicons") != NULL) { 97149213Siedowse comc_curspeed = comc_getspeed(); 98149213Siedowse } 99230257Skib 100230257Skib env = getenv("comconsole_speed"); 101230257Skib if (env != NULL) { 102230257Skib speed = comc_parseint(env); 103149213Siedowse if (speed > 0) 104149213Siedowse comc_curspeed = speed; 105149213Siedowse } 106149213Siedowse 107230257Skib sprintf(intbuf, "%d", comc_curspeed); 108149213Siedowse unsetenv("comconsole_speed"); 109230257Skib env_setenv("comconsole_speed", EV_VOLATILE, intbuf, comc_speed_set, 110149213Siedowse env_nounset); 111230257Skib 112230257Skib env = getenv("comconsole_port"); 113230257Skib if (env != NULL) { 114230257Skib port = comc_parseint(env); 115230257Skib if (port > 0) 116230257Skib comc_port = port; 117230257Skib } 118230257Skib 119230257Skib sprintf(intbuf, "%d", comc_port); 120230257Skib unsetenv("comconsole_port"); 121230257Skib env_setenv("comconsole_port", EV_VOLATILE, intbuf, comc_port_set, 122230257Skib env_nounset); 123230257Skib 124230257Skib env = getenv("comconsole_pcidev"); 125230257Skib if (env != NULL) { 126230257Skib locator = comc_parse_pcidev(env); 127230257Skib if (locator != 0) 128230257Skib comc_pcidev_handle(locator); 129230257Skib } 130230257Skib 131230257Skib unsetenv("comconsole_pcidev"); 132230257Skib env_setenv("comconsole_pcidev", EV_VOLATILE, env, comc_pcidev_set, 133230257Skib env_nounset); 134149213Siedowse } 135242561Savg comc_setup(comc_curspeed, comc_port); 13638465Smsmith} 13738465Smsmith 13838465Smsmithstatic int 13938465Smsmithcomc_init(int arg) 14038465Smsmith{ 14140211Speter 142230257Skib comc_setup(comc_curspeed, comc_port); 14340211Speter 144242561Savg if ((comconsole.c_flags & (C_PRESENTIN | C_PRESENTOUT)) == 145242561Savg (C_PRESENTIN | C_PRESENTOUT)) 146242561Savg return (CMD_OK); 147242561Savg return (CMD_ERROR); 14838465Smsmith} 14938465Smsmith 15039441Smsmithstatic void 15139441Smsmithcomc_putchar(int c) 15239441Smsmith{ 15341285Srnordier int wait; 15441285Srnordier 15541285Srnordier for (wait = COMC_TXWAIT; wait > 0; wait--) 156230257Skib if (inb(comc_port + com_lsr) & LSR_TXRDY) { 157230257Skib outb(comc_port + com_data, (u_char)c); 15841285Srnordier break; 15941285Srnordier } 16039441Smsmith} 16139441Smsmith 16238465Smsmithstatic int 16339441Smsmithcomc_getchar(void) 16438465Smsmith{ 165242561Savg return (comc_ischar() ? inb(comc_port + com_data) : -1); 16638465Smsmith} 16739441Smsmith 16839441Smsmithstatic int 16939441Smsmithcomc_ischar(void) 17039441Smsmith{ 171242561Savg return (inb(comc_port + com_lsr) & LSR_RXRDY); 17239441Smsmith} 173149213Siedowse 174149213Siedowsestatic int 175149213Siedowsecomc_speed_set(struct env_var *ev, int flags, const void *value) 176149213Siedowse{ 177149213Siedowse int speed; 178149213Siedowse 179230257Skib if (value == NULL || (speed = comc_parseint(value)) <= 0) { 180149213Siedowse printf("Invalid speed\n"); 181149213Siedowse return (CMD_ERROR); 182149213Siedowse } 183149213Siedowse 184261574Smav if (comc_curspeed != speed) 185230257Skib comc_setup(speed, comc_port); 186149213Siedowse 187149213Siedowse env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 188149213Siedowse 189149213Siedowse return (CMD_OK); 190149213Siedowse} 191149213Siedowse 192230257Skibstatic int 193230257Skibcomc_port_set(struct env_var *ev, int flags, const void *value) 194230257Skib{ 195230257Skib int port; 196230257Skib 197230257Skib if (value == NULL || (port = comc_parseint(value)) <= 0) { 198230257Skib printf("Invalid port\n"); 199230257Skib return (CMD_ERROR); 200230257Skib } 201230257Skib 202261574Smav if (comc_port != port) 203230257Skib comc_setup(comc_curspeed, port); 204230257Skib 205230257Skib env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 206230257Skib 207230257Skib return (CMD_OK); 208230257Skib} 209230257Skib 210230257Skib/* 211230257Skib * Input: bus:dev:func[:bar]. If bar is not specified, it is 0x10. 212230257Skib * Output: bar[24:16] bus[15:8] dev[7:3] func[2:0] 213230257Skib */ 214230257Skibstatic uint32_t 215230257Skibcomc_parse_pcidev(const char *string) 216230257Skib{ 217230257Skib char *p, *p1; 218230257Skib uint8_t bus, dev, func, bar; 219230257Skib uint32_t locator; 220230257Skib int pres; 221230257Skib 222230257Skib pres = strtol(string, &p, 0); 223230257Skib if (p == string || *p != ':' || pres < 0 ) 224230257Skib return (0); 225230257Skib bus = pres; 226230257Skib p1 = ++p; 227230257Skib 228230257Skib pres = strtol(p1, &p, 0); 229230257Skib if (p == string || *p != ':' || pres < 0 ) 230230257Skib return (0); 231230257Skib dev = pres; 232230257Skib p1 = ++p; 233230257Skib 234230257Skib pres = strtol(p1, &p, 0); 235230257Skib if (p == string || (*p != ':' && *p != '\0') || pres < 0 ) 236230257Skib return (0); 237230257Skib func = pres; 238230257Skib 239230257Skib if (*p == ':') { 240230257Skib p1 = ++p; 241230257Skib pres = strtol(p1, &p, 0); 242230257Skib if (p == string || *p != '\0' || pres <= 0 ) 243230257Skib return (0); 244230257Skib bar = pres; 245230257Skib } else 246230257Skib bar = 0x10; 247230257Skib 248230257Skib locator = (bar << 16) | biospci_locator(bus, dev, func); 249230257Skib return (locator); 250230257Skib} 251230257Skib 252230257Skibstatic int 253230257Skibcomc_pcidev_handle(uint32_t locator) 254230257Skib{ 255230257Skib char intbuf[64]; 256230257Skib uint32_t port; 257230257Skib 258230257Skib if (biospci_read_config(locator & 0xffff, 259230257Skib (locator & 0xff0000) >> 16, 2, &port) == -1) { 260230257Skib printf("Cannot read bar at 0x%x\n", locator); 261230257Skib return (CMD_ERROR); 262230257Skib } 263230257Skib if (!PCI_BAR_IO(port)) { 264230257Skib printf("Memory bar at 0x%x\n", locator); 265230257Skib return (CMD_ERROR); 266230257Skib } 267230257Skib port &= PCIM_BAR_IO_BASE; 268230257Skib 269230257Skib sprintf(intbuf, "%d", port); 270230257Skib unsetenv("comconsole_port"); 271230257Skib env_setenv("comconsole_port", EV_VOLATILE, intbuf, 272230257Skib comc_port_set, env_nounset); 273230257Skib 274230257Skib comc_setup(comc_curspeed, port); 275230257Skib comc_locator = locator; 276230257Skib 277230257Skib return (CMD_OK); 278230257Skib} 279230257Skib 280230257Skibstatic int 281230257Skibcomc_pcidev_set(struct env_var *ev, int flags, const void *value) 282230257Skib{ 283230257Skib uint32_t locator; 284230257Skib int error; 285230257Skib 286230257Skib if (value == NULL || (locator = comc_parse_pcidev(value)) <= 0) { 287230257Skib printf("Invalid pcidev\n"); 288230257Skib return (CMD_ERROR); 289230257Skib } 290242561Savg if ((comconsole.c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) != 0 && 291242561Savg comc_locator != locator) { 292230257Skib error = comc_pcidev_handle(locator); 293230257Skib if (error != CMD_OK) 294230257Skib return (error); 295230257Skib } 296230257Skib env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 297230257Skib return (CMD_OK); 298230257Skib} 299230257Skib 300230257Skibstatic void 301230257Skibcomc_setup(int speed, int port) 302230257Skib{ 303242561Savg static int TRY_COUNT = 1000000; 304260868Smav char intbuf[64]; 305242561Savg int tries; 306230257Skib 307260868Smav unsetenv("hw.uart.console"); 308149213Siedowse comc_curspeed = speed; 309230257Skib comc_port = port; 310261574Smav if ((comconsole.c_flags & (C_ACTIVEIN | C_ACTIVEOUT)) == 0) 311261574Smav return; 312149213Siedowse 313230257Skib outb(comc_port + com_cfcr, CFCR_DLAB | COMC_FMT); 314230257Skib outb(comc_port + com_dlbl, COMC_BPS(speed) & 0xff); 315230257Skib outb(comc_port + com_dlbh, COMC_BPS(speed) >> 8); 316230257Skib outb(comc_port + com_cfcr, COMC_FMT); 317230257Skib outb(comc_port + com_mcr, MCR_RTS | MCR_DTR); 318149213Siedowse 319242561Savg tries = 0; 320149213Siedowse do 321230257Skib inb(comc_port + com_data); 322242561Savg while (inb(comc_port + com_lsr) & LSR_RXRDY && ++tries < TRY_COUNT); 323242561Savg 324260868Smav if (tries < TRY_COUNT) { 325242561Savg comconsole.c_flags |= (C_PRESENTIN | C_PRESENTOUT); 326260868Smav sprintf(intbuf, "io:%d,br:%d", comc_port, comc_curspeed); 327260868Smav env_setenv("hw.uart.console", EV_VOLATILE, intbuf, NULL, NULL); 328260868Smav } else 329242561Savg comconsole.c_flags &= ~(C_PRESENTIN | C_PRESENTOUT); 330149213Siedowse} 331149213Siedowse 332149213Siedowsestatic int 333230257Skibcomc_parseint(const char *speedstr) 334149213Siedowse{ 335149213Siedowse char *p; 336149213Siedowse int speed; 337149213Siedowse 338149213Siedowse speed = strtol(speedstr, &p, 0); 339149213Siedowse if (p == speedstr || *p != '\0' || speed <= 0) 340149213Siedowse return (-1); 341149213Siedowse 342149213Siedowse return (speed); 343149213Siedowse} 344149213Siedowse 345149213Siedowsestatic int 346149213Siedowsecomc_getspeed(void) 347149213Siedowse{ 348149213Siedowse u_int divisor; 349149213Siedowse u_char dlbh; 350149213Siedowse u_char dlbl; 351149213Siedowse u_char cfcr; 352149213Siedowse 353230257Skib cfcr = inb(comc_port + com_cfcr); 354230257Skib outb(comc_port + com_cfcr, CFCR_DLAB | cfcr); 355149213Siedowse 356230257Skib dlbl = inb(comc_port + com_dlbl); 357230257Skib dlbh = inb(comc_port + com_dlbh); 358149213Siedowse 359230257Skib outb(comc_port + com_cfcr, cfcr); 360149213Siedowse 361149213Siedowse divisor = dlbh << 8 | dlbl; 362149213Siedowse 363149213Siedowse /* XXX there should be more sanity checking. */ 364149213Siedowse if (divisor == 0) 365149213Siedowse return (COMSPEED); 366149213Siedowse return (COMC_DIV2BPS(divisor)); 367149213Siedowse} 368