drivers/adb_bus.c

   1 /*
   2  *
   3  * Open Hack'Ware BIOS ADB bus support, ported to OpenBIOS
   4  *
   5  *  Copyright (c) 2005 Jocelyn Mayer
   6  *  Copyright (c) 2005 Stefan Reinauer
   7  *
   8  *   This program is free software; you can redistribute it and/or
   9  *   modify it under the terms of the GNU General Public License V2
  10  *   as published by the Free Software Foundation
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23 #include "libopenbios/bindings.h"
  24 #include "libc/vsprintf.h"
  25
  26 #include "adb_bus.h"
  27 #include "adb_kbd.h"
  28 #include "adb_mouse.h"
  29
  30 DECLARE_UNNAMED_NODE( adb, INSTALL_OPEN, sizeof(int));
  31
  32 static void
  33 adb_initialize (int *idx)
  34 {
  35         phandle_t ph=get_cur_dev();
  36
  37         push_str("adb");
  38         fword("device-type");
  39
  40         set_property(ph, "compatible", "adb", 4);
  41         set_int_property(ph, "#address-cells", 1);
  42         set_int_property(ph, "#size-cells", 0);
  43 }
  44
  45 static void
  46 adb_open(int *idx)
  47 {
  48         RET(-1);
  49 }
  50
  51 static void
  52 adb_close(int *idx)
  53 {
  54 }
  55
  56 NODE_METHODS( adb ) = {
  57         { NULL,                 adb_initialize          },
  58         { "open",               adb_open                },
  59         { "close",              adb_close               },
  60 };
  61
  62 adb_bus_t *adb_bus_new (void *host,
  63                         int (*req)(void *host, const uint8_t *snd_buf,
  64                                    int len, uint8_t *rcv_buf))
  65 {
  66     adb_bus_t *new;
  67
  68     new = malloc(sizeof(adb_bus_t));
  69     if (new == NULL)
  70         return NULL;
  71     new->host = host;
  72     new->req = req;
  73
  74     return new;
  75 }
  76
  77 /* Check and relocate all ADB devices as suggested in
  78  * ADB_manager Apple documentation
  79  */
  80
  81 int adb_bus_init (char *path, adb_bus_t *bus)
  82 {
  83     char buf[64];
  84     uint8_t buffer[ADB_BUF_SIZE];
  85     uint8_t adb_addresses[16] =
  86         { 8, 9, 10, 11, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, 0, };
  87     adb_dev_t tmp_device, **cur;
  88     int address;
  89     int reloc = 0, next_free = 7;
  90     int keep;
  91
  92     snprintf(buf, sizeof(buf), "%s/adb", path);
  93     REGISTER_NAMED_NODE( adb, buf);
  94     /* Reset the bus */
  95     // ADB_DPRINTF("\n");
  96     adb_reset(bus);
  97     cur = &bus->devices;
  98     memset(&tmp_device, 0, sizeof(adb_dev_t));
  99     tmp_device.bus = bus;
 100     for (address = 1; address < 8 && adb_addresses[reloc] > 0;) {
 101         if (address == ADB_RES) {
 102             /* Reserved */
 103             address++;
 104             continue;
 105         }
 106         //ADB_DPRINTF("Check device on ADB address %d\n", address);
 107         tmp_device.addr = address;
 108         switch (adb_reg_get(&tmp_device, 3, buffer)) {
 109         case 0:
 110             //ADB_DPRINTF("No device on ADB address %d\n", address);
 111             /* Register this address as free */
 112             if (adb_addresses[next_free] != 0)
 113                 adb_addresses[next_free++] = address;
 114             /* Check next ADB address */
 115             address++;
 116             break;
 117         case 2:
 118            /* One device answered :
 119             * make it available and relocate it to a free address
 120             */
 121             if (buffer[0] == ADB_CHADDR) {
 122                 /* device self test failed */
 123                 ADB_DPRINTF("device on ADB address %d self-test failed "
 124                             "%02x %02x %02x\n", address,
 125                             buffer[0], buffer[1], buffer[2]);
 126                 keep = 0;
 127             } else {
 128                 //ADB_DPRINTF("device on ADB address %d self-test OK\n",
 129                 //            address);
 130                 keep = 1;
 131             }
 132             ADB_DPRINTF("Relocate device on ADB address %d to %d (%d)\n",
 133                         address, adb_addresses[reloc], reloc);
 134             buffer[0] = ((buffer[0] & 0x40) & ~0x90) | adb_addresses[reloc];
 135             if (keep == 1)
 136                 buffer[0] |= 0x20;
 137             buffer[1] = ADB_CHADDR_NOCOLL;
 138             if (adb_reg_set(&tmp_device, 3, buffer, 2) < 0) {
 139                 ADB_DPRINTF("ADB device relocation failed\n");
 140                 return -1;
 141             }
 142             if (keep == 1) {
 143                 *cur = malloc(sizeof(adb_dev_t));
 144                 if (*cur == NULL) {
 145                     return -1;
 146                 }
 147                 (*cur)->type = address;
 148                 (*cur)->bus = bus;
 149                 (*cur)->addr = adb_addresses[reloc++];
 150                 /* Flush buffers */
 151                 adb_flush(*cur);
 152                 switch ((*cur)->type) {
 153                 case ADB_PROTECT:
 154                     ADB_DPRINTF("Found one protected device\n");
 155                     break;
 156                 case ADB_KEYBD:
 157                     ADB_DPRINTF("Found one keyboard on address %d\n", address);
 158                     adb_kbd_new(buf, *cur);
 159                     break;
 160                 case ADB_MOUSE:
 161                     ADB_DPRINTF("Found one mouse on address %d\n", address);
 162                     adb_mouse_new(buf, *cur);
 163                     break;
 164                 case ADB_ABS:
 165                     ADB_DPRINTF("Found one absolute positioning device\n");
 166                     break;
 167                 case ADB_MODEM:
 168                     ADB_DPRINTF("Found one modem\n");
 169                     break;
 170                 case ADB_RES:
 171                     ADB_DPRINTF("Found one ADB res device\n");
 172                     break;
 173                 case ADB_MISC:
 174                     ADB_DPRINTF("Found one ADB misc device\n");
 175                     break;
 176                 }
 177                 cur = &((*cur)->next);
 178             }
 179             break;
 180         case 1:
 181         case 3 ... 7:
 182             /* SHOULD NOT HAPPEN : register 3 is always two bytes long */
 183             ADB_DPRINTF("Invalid returned len for ADB register 3\n");
 184             return -1;
 185         case -1:
 186             /* ADB ERROR */
 187             ADB_DPRINTF("error gettting ADB register 3\n");
 188             return -1;
 189         }
 190     }
 191
 192     return 0;
 193 }
 194
 195 int adb_cmd (adb_dev_t *dev, uint8_t cmd, uint8_t reg,
 196              uint8_t *buf, int len)
 197 {
 198     uint8_t adb_send[ADB_BUF_SIZE], adb_rcv[ADB_BUF_SIZE];
 199
 200     //ADB_DPRINTF("cmd: %d reg: %d len: %d\n", cmd, reg, len);
 201     if (dev->bus == NULL || dev->bus->req == NULL) {
 202         ADB_DPRINTF("ERROR: invalid bus !\n");
 203         for (;;);
 204     }
 205     /* Sanity checks */
 206     if (cmd != ADB_LISTEN && len != 0) {
 207         /* No buffer transmitted but for LISTEN command */
 208         ADB_DPRINTF("in buffer for cmd %d\n", cmd);
 209         return -1;
 210     }
 211     if (cmd == ADB_LISTEN && ((len < 2 || len > 8) || buf == NULL)) {
 212         /* Need a buffer with a regular register size for LISTEN command */
 213         ADB_DPRINTF("no/invalid buffer for ADB_LISTEN (%d)\n", len);
 214         return -1;
 215     }
 216     if ((cmd == ADB_TALK || cmd == ADB_LISTEN) && reg > 3) {
 217         /* Need a valid register number for LISTEN and TALK commands */
 218         ADB_DPRINTF("invalid reg for TALK/LISTEN command (%d %d)\n", cmd, reg);
 219         return -1;
 220     }
 221     switch (cmd) {
 222     case ADB_SEND_RESET:
 223         adb_send[0] = ADB_SEND_RESET;
 224         break;
 225     case ADB_FLUSH:
 226         adb_send[0] = (dev->addr << 4) | ADB_FLUSH;
 227         break;
 228     case ADB_LISTEN:
 229         memcpy(adb_send + 1, buf, len);
 230         /* No break here */
 231     case ADB_TALK:
 232         adb_send[0] = (dev->addr << 4) | cmd | reg;
 233         break;
 234     }
 235     memset(adb_rcv, 0, ADB_BUF_SIZE);
 236     len = (*dev->bus->req)(dev->bus->host, adb_send, len + 1, adb_rcv);
 237 #ifdef DEBUG_ADB
 238     //printk("%x %x %x %x\n", adb_rcv[0], adb_rcv[1], adb_rcv[2], adb_rcv[3]);
 239 #endif
 240     switch (len) {
 241     case 0:
 242         /* No data */
 243         break;
 244     case 2 ... 8:
 245         /* Register transmitted */
 246         if (buf != NULL)
 247             memcpy(buf, adb_rcv, len);
 248         break;
 249     default:
 250         /* Should never happen */
 251         //ADB_DPRINTF("Cmd %d returned %d bytes !\n", cmd, len);
 252         return -1;
 253     }
 254     //ADB_DPRINTF("retlen: %d\n", len);
 255
 256     return len;
 257 }