The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/geode.c

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    1 /*-
    2  * Copyright (c) 2003-2004 Poul-Henning Kamp
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.4/sys/i386/i386/geode.c 173218 2007-10-31 08:42:18Z phk $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/timetc.h>
   33 #include <sys/bus.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/watchdog.h>
   37 #include <dev/pci/pcireg.h>
   38 #include <dev/pci/pcivar.h>
   39 #include <dev/led/led.h>
   40 #include <machine/pc/bios.h>
   41 
   42 static struct bios_oem bios_soekris = {
   43         { 0xf0000, 0xf1000 },
   44         {
   45                 { "Soekris", 0, 8 },    /* Soekris Engineering. */
   46                 { "net4", 0, 8 },       /* net45xx */
   47                 { "comBIOS", 0, 54 },   /* comBIOS ver. 1.26a  20040819 ... */
   48                 { NULL, 0, 0 },
   49         }
   50 };
   51 
   52 static struct bios_oem bios_soekris_55 = {
   53         { 0xf0000, 0xf1000 },
   54         {
   55                 { "Soekris", 0, 8 },    /* Soekris Engineering. */
   56                 { "net5", 0, 8 },       /* net5xxx */
   57                 { "comBIOS", 0, 54 },   /* comBIOS ver. 1.26a  20040819 ... */
   58                 { NULL, 0, 0 },
   59         }
   60 };
   61 
   62 static struct bios_oem bios_pcengines = {
   63         { 0xf9000, 0xfa000 },
   64         {
   65                 { "PC Engines WRAP", 0, 28 },   /* PC Engines WRAP.1C v1.03 */
   66                 { "tinyBIOS", 0, 28 },          /* tinyBIOS V1.4a (C)1997-2003 */
   67                 { NULL, 0, 0 },
   68         }
   69 };
   70 
   71 static struct bios_oem bios_advantech = {
   72         { 0xfe000, 0xff000 },
   73         {
   74                 { "**** PCM-582", 5, 33 },      /* PCM-5823 BIOS V1.12 ... */
   75                 { "GXm-Cx5530", -11, 35 },      /* 06/07/2002-GXm-Cx5530... */
   76                 { NULL, 0, 0 },
   77         }
   78 };
   79 
   80 static unsigned cba;
   81 static unsigned gpio;
   82 static unsigned geode_counter;
   83 
   84 static struct cdev *led1, *led2, *led3;
   85 static int      led1b, led2b, led3b;
   86 
   87 static void
   88 led_func(void *ptr, int onoff)
   89 {
   90         uint32_t u;
   91         int bit;
   92 
   93         bit = *(int *)ptr;
   94         if (bit < 0) {
   95                 bit = -bit;
   96                 onoff = !onoff;
   97         }
   98 
   99         u = inl(gpio + 4);
  100         if (onoff)
  101                 u |= 1 << bit;
  102         else
  103                 u &= ~(1 << bit);
  104         outl(gpio, u);
  105 }
  106 
  107 static void
  108 cs5536_led_func(void *ptr, int onoff)
  109 {
  110         int bit;
  111         uint16_t a;
  112 
  113         bit = *(int *)ptr;
  114         if (bit < 0) {
  115                 bit = -bit;
  116                 onoff = !onoff;
  117         }
  118 
  119         a = rdmsr(0x5140000c);
  120         if (onoff)
  121                 outl(a, 1 << bit);
  122         else
  123                 outl(a, 1 << (bit + 16));
  124 }
  125 
  126 
  127 static unsigned
  128 geode_get_timecount(struct timecounter *tc)
  129 {
  130         return (inl(geode_counter));
  131 }
  132 
  133 static struct timecounter geode_timecounter = {
  134         geode_get_timecount,
  135         NULL,
  136         0xffffffff,
  137         27000000,
  138         "Geode",
  139         1000
  140 };
  141 
  142 /*
  143  * The GEODE watchdog runs from a 32kHz frequency.  One period of that is
  144  * 31250 nanoseconds which we round down to 2^14 nanoseconds.  The watchdog
  145  * consists of a power-of-two prescaler and a 16 bit counter, so the math
  146  * is quite simple.  The max timeout is 14 + 16 + 13 = 2^43 nsec ~= 2h26m.
  147  */
  148 static void
  149 geode_watchdog(void *foo __unused, u_int cmd, int *error)
  150 {
  151         u_int u, p, r;
  152 
  153         u = cmd & WD_INTERVAL;
  154         if (u >= 14 && u <= 43) {
  155                 u -= 14;
  156                 if (u > 16) {
  157                         p = u - 16;
  158                         u -= p;
  159                 } else {
  160                         p = 0;
  161                 }
  162                 if (u == 16)
  163                         u = (1 << u) - 1;
  164                 else
  165                         u = 1 << u;
  166                 r = inw(cba + 2) & 0xff00;
  167                 outw(cba + 2, p | 0xf0 | r);
  168                 outw(cba, u);
  169                 *error = 0;
  170         } else {
  171                 outw(cba, 0);
  172         }
  173 }
  174 
  175 /*
  176  * We run MFGPT0 off the 32kHz frequency and prescale by 16384 giving a
  177  * period of half a second.
  178  * Range becomes 2^30 (= 1 sec) to 2^44 (almost 5 hours)
  179  */
  180 static void
  181 cs5536_watchdog(void *foo __unused, u_int cmd, int *error)
  182 {
  183         u_int u, p;
  184         uint16_t a;
  185         uint32_t m;
  186 
  187         a = rdmsr(0x5140000d);
  188         m = rdmsr(0x51400029);
  189         m &= ~(1 << 24);
  190         wrmsr(0x51400029, m);
  191 
  192         u = cmd & WD_INTERVAL;
  193         if (u >= 30 && u <= 44) {
  194                 p = 1 << (u - 29);
  195 
  196                 /* Set up MFGPT0, 32khz, prescaler 16k, C2 event */
  197                 outw(a + 6, 0x030e);
  198                 /* set comparator 2 */
  199                 outw(a + 2, p);
  200                 /* reset counter */
  201                 outw(a + 4, 0);
  202                 /* Arm reset mechanism */
  203                 m |= (1 << 24);
  204                 wrmsr(0x51400029, m);
  205                 /* Start counter */
  206                 outw(a + 6, 0x8000);
  207 
  208                 *error = 0;
  209         }
  210 }
  211 
  212 /*
  213  * The Advantech PCM-582x watchdog expects 0x1 at I/O port 0x0443
  214  * every 1.6 secs +/- 30%. Writing 0x0 disables the watchdog
  215  * NB: reading the I/O port enables the timer as well
  216  */
  217 static void
  218 advantech_watchdog(void *foo __unused, u_int cmd, int *error)
  219 {
  220         u_int u;
  221 
  222         u = cmd & WD_INTERVAL;
  223         if (u > 0 && u <= WD_TO_1SEC) {
  224                 outb(0x0443, 1);
  225                 *error = 0;
  226         } else {
  227                 outb(0x0443, 0);
  228         }
  229 }
  230 
  231 static int
  232 geode_probe(device_t self)
  233 {
  234 #define BIOS_OEM_MAXLEN 80
  235         static u_char bios_oem[BIOS_OEM_MAXLEN] = "\0";
  236 
  237         switch (pci_get_devid(self)) {
  238         case 0x0515100b:
  239                 if (geode_counter == 0) {
  240                         /*
  241                          * The address of the CBA is written to this register
  242                          * by the bios, see p161 in data sheet.
  243                          */
  244                         cba = pci_read_config(self, 0x64, 4);
  245                         printf("Geode CBA@ 0x%x\n", cba);
  246                         geode_counter = cba + 0x08;
  247                         outl(cba + 0x0d, 2);
  248                         printf("Geode rev: %02x %02x\n",
  249                                 inb(cba + 0x3c), inb(cba + 0x3d));
  250                         tc_init(&geode_timecounter);
  251                         EVENTHANDLER_REGISTER(watchdog_list, geode_watchdog,
  252                             NULL, 0);
  253                 }
  254                 break;
  255         case 0x0510100b:
  256                 gpio = pci_read_config(self, PCIR_BAR(0), 4);
  257                 gpio &= ~0x1f;
  258                 printf("Geode GPIO@ = %x\n", gpio);
  259                 if ( bios_oem_strings(&bios_soekris,
  260                                         bios_oem, BIOS_OEM_MAXLEN) > 0 ) {
  261                         led1b = 20;
  262                         led1 = led_create(led_func, &led1b, "error");
  263                 } else if ( bios_oem_strings(&bios_pcengines,
  264                                         bios_oem, BIOS_OEM_MAXLEN) > 0 ) {
  265                         led1b = -2;
  266                         led2b = -3;
  267                         led3b = -18;
  268                         led1 = led_create(led_func, &led1b, "led1");
  269                         led2 = led_create(led_func, &led2b, "led2");
  270                         led3 = led_create(led_func, &led3b, "led3");
  271                         /*
  272                         * Turn on first LED so we don't make
  273                         * people think their box just died.
  274                         */
  275                         led_func(&led1b, 1);
  276                 }
  277                 if ( strlen(bios_oem) )
  278                         printf("Geode %s\n", bios_oem);
  279                 break;
  280         case 0x01011078:
  281                 if ( bios_oem_strings(&bios_advantech,
  282                                 bios_oem, BIOS_OEM_MAXLEN) > 0 ) {
  283                         printf("Geode %s\n", bios_oem);
  284                         EVENTHANDLER_REGISTER(watchdog_list, advantech_watchdog,
  285                             NULL, 0);
  286                 }
  287                 break;
  288         case 0x20801022:
  289                 if ( bios_oem_strings(&bios_soekris_55,
  290                     bios_oem, BIOS_OEM_MAXLEN) > 0 ) {
  291                         printf("Geode LX: %s\n", bios_oem);
  292                         led1b = 6;
  293                         led1 = led_create(cs5536_led_func, &led1b, "error");
  294                 }
  295                 printf("MFGPT bar: %jx\n", rdmsr(0x5140000d));
  296                 EVENTHANDLER_REGISTER(watchdog_list, cs5536_watchdog,
  297                     NULL, 0);
  298                 break;
  299         }
  300         return (ENXIO);
  301 }
  302 
  303 static int
  304 geode_attach(device_t self)
  305 {
  306 
  307         return(ENODEV);
  308 }
  309 
  310 static device_method_t geode_methods[] = {
  311         /* Device interface */
  312         DEVMETHOD(device_probe,         geode_probe),
  313         DEVMETHOD(device_attach,        geode_attach),
  314         DEVMETHOD(device_suspend,       bus_generic_suspend),
  315         DEVMETHOD(device_resume,        bus_generic_resume),
  316         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  317         {0, 0}
  318 };
  319  
  320 static driver_t geode_driver = {
  321         "geode",
  322         geode_methods,
  323         0,
  324 };
  325 
  326 static devclass_t geode_devclass;
  327 
  328 DRIVER_MODULE(geode, pci, geode_driver, geode_devclass, 0, 0);

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