drivers/isdn/hisax/bkm_a4t.c

   1 /* $Id: bkm_a4t.c,v 1.1.4.1 2001/11/20 14:19:35 kai Exp $
   2  *
   3  * low level stuff for T-Berkom A4T
   4  *
   5  * Author       Roland Klabunde
   6  * Copyright    by Roland Klabunde   <R.Klabunde@Berkom.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  */
  12
  13 #define __NO_VERSION__
  14
  15 #include <linux/config.h>
  16 #include <linux/init.h>
  17 #include "hisax.h"
  18 #include "isac.h"
  19 #include "hscx.h"
  20 #include "jade.h"
  21 #include "isdnl1.h"
  22 #include <linux/pci.h>
  23 #include "bkm_ax.h"
  24
  25 extern const char *CardType[];
  26
  27 const char *bkm_a4t_revision = "$Revision: 1.1.4.1 $";
  28
  29
  30 static inline u_char
  31 readreg(unsigned int ale, unsigned long adr, u_char off)
  32 {
  33         register u_int ret;
  34         long flags;
  35         unsigned int *po = (unsigned int *) adr;        /* Postoffice */
  36         save_flags(flags);
  37         cli();
  38         *po = (GCS_2 | PO_WRITE | off);
  39         __WAITI20__(po);
  40         *po = (ale | PO_READ);
  41         __WAITI20__(po);
  42         ret = *po;
  43         restore_flags(flags);
  44         return ((unsigned char) ret);
  45 }
  46
  47
  48 static inline void
  49 readfifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
  50 {
  51         /* fifo read without cli because it's allready done  */
  52         int i;
  53         for (i = 0; i < size; i++)
  54                 *data++ = readreg(ale, adr, off);
  55 }
  56
  57
  58 static inline void
  59 writereg(unsigned int ale, unsigned long adr, u_char off, u_char data)
  60 {
  61         long flags;
  62         unsigned int *po = (unsigned int *) adr;        /* Postoffice */
  63         save_flags(flags);
  64         cli();
  65         *po = (GCS_2 | PO_WRITE | off);
  66         __WAITI20__(po);
  67         *po = (ale | PO_WRITE | data);
  68         __WAITI20__(po);
  69         restore_flags(flags);
  70 }
  71
  72
  73 static inline void
  74 writefifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
  75 {
  76         /* fifo write without cli because it's allready done  */
  77         int i;
  78
  79         for (i = 0; i < size; i++)
  80                 writereg(ale, adr, off, *data++);
  81 }
  82
  83
  84 /* Interface functions */
  85
  86 static u_char
  87 ReadISAC(struct IsdnCardState *cs, u_char offset)
  88 {
  89         return (readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset));
  90 }
  91
  92 static void
  93 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  94 {
  95         writereg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset, value);
  96 }
  97
  98 static void
  99 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
 100 {
 101         readfifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
 102 }
 103
 104 static void
 105 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
 106 {
 107         writefifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
 108 }
 109
 110 static u_char
 111 ReadJADE(struct IsdnCardState *cs, int jade, u_char offset)
 112 {
 113         return (readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80))));
 114 }
 115
 116 static void
 117 WriteJADE(struct IsdnCardState *cs, int jade, u_char offset, u_char value)
 118 {
 119         writereg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80)), value);
 120 }
 121
 122 /*
 123  * fast interrupt JADE stuff goes here
 124  */
 125
 126 #define READJADE(cs, nr, reg) readreg(cs->hw.ax.jade_ale,\
 127                 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)))
 128 #define WRITEJADE(cs, nr, reg, data) writereg(cs->hw.ax.jade_ale,\
 129                 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), data)
 130
 131 #define READJADEFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ax.jade_ale,\
 132                 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
 133 #define WRITEJADEFIFO(cs, nr, ptr, cnt) writefifo( cs->hw.ax.jade_ale,\
 134                 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
 135
 136 #include "jade_irq.c"
 137
 138 static void
 139 bkm_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 140 {
 141         struct IsdnCardState *cs = dev_id;
 142         u_char val = 0;
 143         I20_REGISTER_FILE *pI20_Regs;
 144
 145         if (!cs) {
 146                 printk(KERN_WARNING "HiSax: Telekom A4T: Spurious interrupt!\n");
 147                 return;
 148         }
 149         pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 150
 151         /* ISDN interrupt pending? */
 152         if (pI20_Regs->i20IntStatus & intISDN) {
 153                 /* Reset the ISDN interrupt     */
 154                 pI20_Regs->i20IntStatus = intISDN;
 155                 /* Disable ISDN interrupt */
 156                 pI20_Regs->i20IntCtrl &= ~intISDN;
 157                 /* Channel A first */
 158                 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0x80);
 159                 if (val) {
 160                         jade_int_main(cs, val, 0);
 161                 }
 162                 /* Channel B  */
 163                 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0xC0);
 164                 if (val) {
 165                         jade_int_main(cs, val, 1);
 166                 }
 167                 /* D-Channel */
 168                 val = readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, ISAC_ISTA);
 169                 if (val) {
 170                         isac_interrupt(cs, val);
 171                 }
 172                 /* Reenable ISDN interrupt */
 173                 pI20_Regs->i20IntCtrl |= intISDN;
 174         }
 175 }
 176
 177 void
 178 release_io_bkm(struct IsdnCardState *cs)
 179 {
 180         if (cs->hw.ax.base) {
 181                 iounmap((void *) cs->hw.ax.base);
 182                 cs->hw.ax.base = 0;
 183         }
 184 }
 185
 186 static void
 187 enable_bkm_int(struct IsdnCardState *cs, unsigned bEnable)
 188 {
 189         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
 190                 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 191                 if (bEnable)
 192                         pI20_Regs->i20IntCtrl |= (intISDN | intPCI);
 193                 else
 194                         /* CAUTION: This disables the video capture driver too */
 195                         pI20_Regs->i20IntCtrl &= ~(intISDN | intPCI);
 196         }
 197 }
 198
 199 static void
 200 reset_bkm(struct IsdnCardState *cs)
 201 {
 202         long flags;
 203
 204         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
 205                 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 206                 save_flags(flags);
 207                 sti();
 208                 /* Issue the I20 soft reset     */
 209                 pI20_Regs->i20SysControl = 0xFF;        /* all in */
 210                 set_current_state(TASK_UNINTERRUPTIBLE);
 211                 schedule_timeout((10 * HZ) / 1000);
 212                 /* Remove the soft reset */
 213                 pI20_Regs->i20SysControl = sysRESET | 0xFF;
 214                 set_current_state(TASK_UNINTERRUPTIBLE);
 215                 schedule_timeout((10 * HZ) / 1000);
 216                 /* Set our configuration */
 217                 pI20_Regs->i20SysControl = sysRESET | sysCFG;
 218                 /* Issue ISDN reset     */
 219                 pI20_Regs->i20GuestControl = guestWAIT_CFG |
 220                     g_A4T_JADE_RES |
 221                     g_A4T_ISAR_RES |
 222                     g_A4T_ISAC_RES |
 223                     g_A4T_JADE_BOOTR |
 224                     g_A4T_ISAR_BOOTR;
 225                 set_current_state(TASK_UNINTERRUPTIBLE);
 226                 schedule_timeout((10 * HZ) / 1000);
 227
 228                 /* Remove RESET state from ISDN */
 229                 pI20_Regs->i20GuestControl &= ~(g_A4T_ISAC_RES |
 230                                                 g_A4T_JADE_RES |
 231                                                 g_A4T_ISAR_RES);
 232                 set_current_state(TASK_UNINTERRUPTIBLE);
 233                 schedule_timeout((10 * HZ) / 1000);
 234                 restore_flags(flags);
 235         }
 236 }
 237
 238 static int
 239 BKM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 240 {
 241         switch (mt) {
 242                 case CARD_RESET:
 243                         /* Disable ints */
 244                         enable_bkm_int(cs, 0);
 245                         reset_bkm(cs);
 246                         return (0);
 247                 case CARD_RELEASE:
 248                         /* Sanity */
 249                         enable_bkm_int(cs, 0);
 250                         reset_bkm(cs);
 251                         release_io_bkm(cs);
 252                         return (0);
 253                 case CARD_INIT:
 254                         clear_pending_isac_ints(cs);
 255                         clear_pending_jade_ints(cs);
 256                         initisac(cs);
 257                         initjade(cs);
 258                         /* Enable ints */
 259                         enable_bkm_int(cs, 1);
 260                         return (0);
 261                 case CARD_TEST:
 262                         return (0);
 263         }
 264         return (0);
 265 }
 266
 267 static struct pci_dev *dev_a4t __initdata = NULL;
 268
 269 int __init
 270 setup_bkm_a4t(struct IsdnCard *card)
 271 {
 272         struct IsdnCardState *cs = card->cs;
 273         char tmp[64];
 274         u_int pci_memaddr = 0, found = 0;
 275         I20_REGISTER_FILE *pI20_Regs;
 276 #if CONFIG_PCI
 277 #endif
 278
 279         strcpy(tmp, bkm_a4t_revision);
 280         printk(KERN_INFO "HiSax: T-Berkom driver Rev. %s\n", HiSax_getrev(tmp));
 281         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
 282                 cs->subtyp = BKM_A4T;
 283         } else
 284                 return (0);
 285
 286 #if CONFIG_PCI
 287         if (!pci_present()) {
 288                 printk(KERN_ERR "bkm_a4t: no PCI bus present\n");
 289                 return (0);
 290         }
 291         while ((dev_a4t = pci_find_device(PCI_VENDOR_ID_ZORAN,
 292                 PCI_DEVICE_ID_ZORAN_36120, dev_a4t))) {
 293                 u16 sub_sys;
 294                 u16 sub_vendor;
 295
 296                 sub_vendor = dev_a4t->subsystem_vendor;
 297                 sub_sys = dev_a4t->subsystem_device;
 298                 if ((sub_sys == PCI_DEVICE_ID_BERKOM_A4T) && (sub_vendor == PCI_VENDOR_ID_BERKOM)) {
 299                         if (pci_enable_device(dev_a4t))
 300                                 return(0);
 301                         found = 1;
 302                         pci_memaddr = pci_resource_start(dev_a4t, 0);
 303                         cs->irq = dev_a4t->irq;
 304                         break;
 305                 }
 306         }
 307         if (!found) {
 308                 printk(KERN_WARNING "HiSax: %s: Card not found\n", CardType[card->typ]);
 309                 return (0);
 310         }
 311         if (!cs->irq) {         /* IRQ range check ?? */
 312                 printk(KERN_WARNING "HiSax: %s: No IRQ\n", CardType[card->typ]);
 313                 return (0);
 314         }
 315         if (!pci_memaddr) {
 316                 printk(KERN_WARNING "HiSax: %s: No Memory base address\n", CardType[card->typ]);
 317                 return (0);
 318         }
 319         cs->hw.ax.base = (long) ioremap(pci_memaddr, 4096);
 320         /* Check suspecious address */
 321         pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 322         if ((pI20_Regs->i20IntStatus & 0x8EFFFFFF) != 0) {
 323                 printk(KERN_WARNING "HiSax: %s address %lx-%lx suspecious\n",
 324                        CardType[card->typ], cs->hw.ax.base, cs->hw.ax.base + 4096);
 325                 iounmap((void *) cs->hw.ax.base);
 326                 cs->hw.ax.base = 0;
 327                 return (0);
 328         }
 329         cs->hw.ax.isac_adr = cs->hw.ax.base + PO_OFFSET;
 330         cs->hw.ax.jade_adr = cs->hw.ax.base + PO_OFFSET;
 331         cs->hw.ax.isac_ale = GCS_1;
 332         cs->hw.ax.jade_ale = GCS_3;
 333 #else
 334         printk(KERN_WARNING "HiSax: %s: NO_PCI_BIOS\n", CardType[card->typ]);
 335         printk(KERN_WARNING "HiSax: %s: unable to configure\n", CardType[card->typ]);
 336         return (0);
 337 #endif                          /* CONFIG_PCI */
 338         printk(KERN_INFO "HiSax: %s: Card configured at 0x%lX IRQ %d\n",
 339                CardType[card->typ], cs->hw.ax.base, cs->irq);
 340
 341         reset_bkm(cs);
 342         cs->readisac = &ReadISAC;
 343         cs->writeisac = &WriteISAC;
 344         cs->readisacfifo = &ReadISACfifo;
 345         cs->writeisacfifo = &WriteISACfifo;
 346         cs->BC_Read_Reg = &ReadJADE;
 347         cs->BC_Write_Reg = &WriteJADE;
 348         cs->BC_Send_Data = &jade_fill_fifo;
 349         cs->cardmsg = &BKM_card_msg;
 350         cs->irq_func = &bkm_interrupt;
 351         cs->irq_flags |= SA_SHIRQ;
 352         ISACVersion(cs, "Telekom A4T:");
 353         /* Jade version */
 354         JadeVersion(cs, "Telekom A4T:");
 355         return (1);
 356 }