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   1 /* $Id: bkm_a4t.c,v 1.22.2.4 2004/01/14 16:04:48 keil 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
  14 #include <linux/config.h>
  15 #include <linux/init.h>
  16 #include "hisax.h"
  17 #include "isac.h"
  18 #include "hscx.h"
  19 #include "jade.h"
  20 #include "isdnl1.h"
  21 #include <linux/pci.h>
  22 #include "bkm_ax.h"
  23
  24 extern const char *CardType[];
  25
  26 static const char *bkm_a4t_revision = "$Revision: 1.22.2.4 $";
  27
  28
  29 static inline u_char
  30 readreg(unsigned int ale, unsigned long adr, u_char off)
  31 {
  32         register u_int ret;
  33         unsigned int *po = (unsigned int *) adr;        /* Postoffice */
  34
  35         *po = (GCS_2 | PO_WRITE | off);
  36         __WAITI20__(po);
  37         *po = (ale | PO_READ);
  38         __WAITI20__(po);
  39         ret = *po;
  40         return ((unsigned char) ret);
  41 }
  42
  43
  44 static inline void
  45 readfifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
  46 {
  47         int i;
  48         for (i = 0; i < size; i++)
  49                 *data++ = readreg(ale, adr, off);
  50 }
  51
  52
  53 static inline void
  54 writereg(unsigned int ale, unsigned long adr, u_char off, u_char data)
  55 {
  56         unsigned int *po = (unsigned int *) adr;        /* Postoffice */
  57         *po = (GCS_2 | PO_WRITE | off);
  58         __WAITI20__(po);
  59         *po = (ale | PO_WRITE | data);
  60         __WAITI20__(po);
  61 }
  62
  63
  64 static inline void
  65 writefifo(unsigned int ale, unsigned long adr, u_char off, u_char * data, int size)
  66 {
  67         int i;
  68
  69         for (i = 0; i < size; i++)
  70                 writereg(ale, adr, off, *data++);
  71 }
  72
  73
  74 /* Interface functions */
  75
  76 static u_char
  77 ReadISAC(struct IsdnCardState *cs, u_char offset)
  78 {
  79         return (readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset));
  80 }
  81
  82 static void
  83 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
  84 {
  85         writereg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset, value);
  86 }
  87
  88 static void
  89 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  90 {
  91         readfifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
  92 }
  93
  94 static void
  95 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
  96 {
  97         writefifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size);
  98 }
  99
 100 static u_char
 101 ReadJADE(struct IsdnCardState *cs, int jade, u_char offset)
 102 {
 103         return (readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80))));
 104 }
 105
 106 static void
 107 WriteJADE(struct IsdnCardState *cs, int jade, u_char offset, u_char value)
 108 {
 109         writereg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80)), value);
 110 }
 111
 112 /*
 113  * fast interrupt JADE stuff goes here
 114  */
 115
 116 #define READJADE(cs, nr, reg) readreg(cs->hw.ax.jade_ale,\
 117                 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)))
 118 #define WRITEJADE(cs, nr, reg, data) writereg(cs->hw.ax.jade_ale,\
 119                 cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), data)
 120
 121 #define READJADEFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ax.jade_ale,\
 122                 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
 123 #define WRITEJADEFIFO(cs, nr, ptr, cnt) writefifo( cs->hw.ax.jade_ale,\
 124                 cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt)
 125
 126 #include "jade_irq.c"
 127
 128 static irqreturn_t
 129 bkm_interrupt(int intno, void *dev_id, struct pt_regs *regs)
 130 {
 131         struct IsdnCardState *cs = dev_id;
 132         u_char val = 0;
 133         u_long flags;
 134         I20_REGISTER_FILE *pI20_Regs;
 135
 136         spin_lock_irqsave(&cs->lock, flags);
 137         pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 138
 139         /* ISDN interrupt pending? */
 140         if (pI20_Regs->i20IntStatus & intISDN) {
 141                 /* Reset the ISDN interrupt     */
 142                 pI20_Regs->i20IntStatus = intISDN;
 143                 /* Disable ISDN interrupt */
 144                 pI20_Regs->i20IntCtrl &= ~intISDN;
 145                 /* Channel A first */
 146                 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0x80);
 147                 if (val) {
 148                         jade_int_main(cs, val, 0);
 149                 }
 150                 /* Channel B  */
 151                 val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0xC0);
 152                 if (val) {
 153                         jade_int_main(cs, val, 1);
 154                 }
 155                 /* D-Channel */
 156                 val = readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, ISAC_ISTA);
 157                 if (val) {
 158                         isac_interrupt(cs, val);
 159                 }
 160                 /* Reenable ISDN interrupt */
 161                 pI20_Regs->i20IntCtrl |= intISDN;
 162                 spin_unlock_irqrestore(&cs->lock, flags);
 163                 return IRQ_HANDLED;
 164         } else {
 165                 spin_unlock_irqrestore(&cs->lock, flags);
 166                 return IRQ_NONE;
 167         }
 168 }
 169
 170 static void
 171 release_io_bkm(struct IsdnCardState *cs)
 172 {
 173         if (cs->hw.ax.base) {
 174                 iounmap((void *) cs->hw.ax.base);
 175                 cs->hw.ax.base = 0;
 176         }
 177 }
 178
 179 static void
 180 enable_bkm_int(struct IsdnCardState *cs, unsigned bEnable)
 181 {
 182         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
 183                 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 184                 if (bEnable)
 185                         pI20_Regs->i20IntCtrl |= (intISDN | intPCI);
 186                 else
 187                         /* CAUTION: This disables the video capture driver too */
 188                         pI20_Regs->i20IntCtrl &= ~(intISDN | intPCI);
 189         }
 190 }
 191
 192 static void
 193 reset_bkm(struct IsdnCardState *cs)
 194 {
 195         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
 196                 I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 197                 /* Issue the I20 soft reset     */
 198                 pI20_Regs->i20SysControl = 0xFF;        /* all in */
 199                 mdelay(10);
 200                 /* Remove the soft reset */
 201                 pI20_Regs->i20SysControl = sysRESET | 0xFF;
 202                 mdelay(10);
 203                 /* Set our configuration */
 204                 pI20_Regs->i20SysControl = sysRESET | sysCFG;
 205                 /* Issue ISDN reset     */
 206                 pI20_Regs->i20GuestControl = guestWAIT_CFG |
 207                     g_A4T_JADE_RES |
 208                     g_A4T_ISAR_RES |
 209                     g_A4T_ISAC_RES |
 210                     g_A4T_JADE_BOOTR |
 211                     g_A4T_ISAR_BOOTR;
 212                 mdelay(10);
 213
 214                 /* Remove RESET state from ISDN */
 215                 pI20_Regs->i20GuestControl &= ~(g_A4T_ISAC_RES |
 216                                                 g_A4T_JADE_RES |
 217                                                 g_A4T_ISAR_RES);
 218                 mdelay(10);
 219         }
 220 }
 221
 222 static int
 223 BKM_card_msg(struct IsdnCardState *cs, int mt, void *arg)
 224 {
 225         u_long flags;
 226
 227         switch (mt) {
 228                 case CARD_RESET:
 229                         /* Disable ints */
 230                         spin_lock_irqsave(&cs->lock, flags);
 231                         enable_bkm_int(cs, 0);
 232                         reset_bkm(cs);
 233                         spin_unlock_irqrestore(&cs->lock, flags);
 234                         return (0);
 235                 case CARD_RELEASE:
 236                         /* Sanity */
 237                         spin_lock_irqsave(&cs->lock, flags);
 238                         enable_bkm_int(cs, 0);
 239                         reset_bkm(cs);
 240                         spin_unlock_irqrestore(&cs->lock, flags);
 241                         release_io_bkm(cs);
 242                         return (0);
 243                 case CARD_INIT:
 244                         spin_lock_irqsave(&cs->lock, flags);
 245                         clear_pending_isac_ints(cs);
 246                         clear_pending_jade_ints(cs);
 247                         initisac(cs);
 248                         initjade(cs);
 249                         /* Enable ints */
 250                         enable_bkm_int(cs, 1);
 251                         spin_unlock_irqrestore(&cs->lock, flags);
 252                         return (0);
 253                 case CARD_TEST:
 254                         return (0);
 255         }
 256         return (0);
 257 }
 258
 259 static struct pci_dev *dev_a4t __initdata = NULL;
 260
 261 int __init
 262 setup_bkm_a4t(struct IsdnCard *card)
 263 {
 264         struct IsdnCardState *cs = card->cs;
 265         char tmp[64];
 266         u_int pci_memaddr = 0, found = 0;
 267         I20_REGISTER_FILE *pI20_Regs;
 268 #ifdef CONFIG_PCI
 269 #endif
 270
 271         strcpy(tmp, bkm_a4t_revision);
 272         printk(KERN_INFO "HiSax: T-Berkom driver Rev. %s\n", HiSax_getrev(tmp));
 273         if (cs->typ == ISDN_CTYPE_BKM_A4T) {
 274                 cs->subtyp = BKM_A4T;
 275         } else
 276                 return (0);
 277
 278 #ifdef CONFIG_PCI
 279         while ((dev_a4t = pci_find_device(PCI_VENDOR_ID_ZORAN,
 280                 PCI_DEVICE_ID_ZORAN_36120, dev_a4t))) {
 281                 u16 sub_sys;
 282                 u16 sub_vendor;
 283
 284                 sub_vendor = dev_a4t->subsystem_vendor;
 285                 sub_sys = dev_a4t->subsystem_device;
 286                 if ((sub_sys == PCI_DEVICE_ID_BERKOM_A4T) && (sub_vendor == PCI_VENDOR_ID_BERKOM)) {
 287                         if (pci_enable_device(dev_a4t))
 288                                 return(0);
 289                         found = 1;
 290                         pci_memaddr = pci_resource_start(dev_a4t, 0);
 291                         cs->irq = dev_a4t->irq;
 292                         break;
 293                 }
 294         }
 295         if (!found) {
 296                 printk(KERN_WARNING "HiSax: %s: Card not found\n", CardType[card->typ]);
 297                 return (0);
 298         }
 299         if (!cs->irq) {         /* IRQ range check ?? */
 300                 printk(KERN_WARNING "HiSax: %s: No IRQ\n", CardType[card->typ]);
 301                 return (0);
 302         }
 303         if (!pci_memaddr) {
 304                 printk(KERN_WARNING "HiSax: %s: No Memory base address\n", CardType[card->typ]);
 305                 return (0);
 306         }
 307         cs->hw.ax.base = (long) ioremap(pci_memaddr, 4096);
 308         /* Check suspecious address */
 309         pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base);
 310         if ((pI20_Regs->i20IntStatus & 0x8EFFFFFF) != 0) {
 311                 printk(KERN_WARNING "HiSax: %s address %lx-%lx suspecious\n",
 312                        CardType[card->typ], cs->hw.ax.base, cs->hw.ax.base + 4096);
 313                 iounmap((void *) cs->hw.ax.base);
 314                 cs->hw.ax.base = 0;
 315                 return (0);
 316         }
 317         cs->hw.ax.isac_adr = cs->hw.ax.base + PO_OFFSET;
 318         cs->hw.ax.jade_adr = cs->hw.ax.base + PO_OFFSET;
 319         cs->hw.ax.isac_ale = GCS_1;
 320         cs->hw.ax.jade_ale = GCS_3;
 321 #else
 322         printk(KERN_WARNING "HiSax: %s: NO_PCI_BIOS\n", CardType[card->typ]);
 323         printk(KERN_WARNING "HiSax: %s: unable to configure\n", CardType[card->typ]);
 324         return (0);
 325 #endif                          /* CONFIG_PCI */
 326         printk(KERN_INFO "HiSax: %s: Card configured at 0x%lX IRQ %d\n",
 327                CardType[card->typ], cs->hw.ax.base, cs->irq);
 328
 329         setup_isac(cs);
 330         cs->readisac = &ReadISAC;
 331         cs->writeisac = &WriteISAC;
 332         cs->readisacfifo = &ReadISACfifo;
 333         cs->writeisacfifo = &WriteISACfifo;
 334         cs->BC_Read_Reg = &ReadJADE;
 335         cs->BC_Write_Reg = &WriteJADE;
 336         cs->BC_Send_Data = &jade_fill_fifo;
 337         cs->cardmsg = &BKM_card_msg;
 338         cs->irq_func = &bkm_interrupt;
 339         cs->irq_flags |= SA_SHIRQ;
 340         ISACVersion(cs, "Telekom A4T:");
 341         /* Jade version */
 342         JadeVersion(cs, "Telekom A4T:");
 343         return (1);
 344 }