include/linux/parport_pc.h

   1 #ifndef __LINUX_PARPORT_PC_H
   2 #define __LINUX_PARPORT_PC_H
   3
   4 #include <asm/io.h>
   5
   6 /* --- register definitions ------------------------------- */
   7
   8 #define ECONTROL(p) ((p)->base_hi + 0x2)
   9 #define CONFIGB(p)  ((p)->base_hi + 0x1)
  10 #define CONFIGA(p)  ((p)->base_hi + 0x0)
  11 #define FIFO(p)     ((p)->base_hi + 0x0)
  12 #define EPPDATA(p)  ((p)->base    + 0x4)
  13 #define EPPADDR(p)  ((p)->base    + 0x3)
  14 #define CONTROL(p)  ((p)->base    + 0x2)
  15 #define STATUS(p)   ((p)->base    + 0x1)
  16 #define DATA(p)     ((p)->base    + 0x0)
  17
  18 struct parport_pc_private {
  19         /* Contents of CTR. */
  20         unsigned char ctr;
  21
  22         /* Bitmask of writable CTR bits. */
  23         unsigned char ctr_writable;
  24
  25         /* Whether or not there's an ECR. */
  26         int ecr;
  27
  28         /* Number of PWords that FIFO will hold. */
  29         int fifo_depth;
  30
  31         /* Number of bytes per portword. */
  32         int pword;
  33
  34         /* Not used yet. */
  35         int readIntrThreshold;
  36         int writeIntrThreshold;
  37
  38         /* buffer suitable for DMA, if DMA enabled */
  39         char *dma_buf;
  40         dma_addr_t dma_handle;
  41         struct pci_dev *dev;
  42         struct list_head list;
  43         struct parport *port;
  44 };
  45
  46 static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
  47 {
  48 #ifdef DEBUG_PARPORT
  49         printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
  50 #endif
  51         outb(d, DATA(p));
  52 }
  53
  54 static __inline__ unsigned char parport_pc_read_data(struct parport *p)
  55 {
  56         unsigned char val = inb (DATA (p));
  57 #ifdef DEBUG_PARPORT
  58         printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
  59                 p, val);
  60 #endif
  61         return val;
  62 }
  63
  64 #ifdef DEBUG_PARPORT
  65 extern __inline__ void dump_parport_state (char *str, struct parport *p)
  66 {
  67         /* here's hoping that reading these ports won't side-effect anything underneath */
  68         unsigned char ecr = inb (ECONTROL (p));
  69         unsigned char dcr = inb (CONTROL (p));
  70         unsigned char dsr = inb (STATUS (p));
  71         static char *ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
  72         const struct parport_pc_private *priv = (parport_pc_private *)p->physport->private_data;
  73         int i;
  74
  75         printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
  76         if (ecr & 0x10) printk (",nErrIntrEn");
  77         if (ecr & 0x08) printk (",dmaEn");
  78         if (ecr & 0x04) printk (",serviceIntr");
  79         if (ecr & 0x02) printk (",f_full");
  80         if (ecr & 0x01) printk (",f_empty");
  81         for (i=0; i<2; i++) {
  82                 printk ("]  dcr(%s)=[", i ? "soft" : "hard");
  83                 dcr = i ? priv->ctr : inb (CONTROL (p));
  84
  85                 if (dcr & 0x20) {
  86                         printk ("rev");
  87                 } else {
  88                         printk ("fwd");
  89                 }
  90                 if (dcr & 0x10) printk (",ackIntEn");
  91                 if (!(dcr & 0x08)) printk (",N-SELECT-IN");
  92                 if (dcr & 0x04) printk (",N-INIT");
  93                 if (!(dcr & 0x02)) printk (",N-AUTOFD");
  94                 if (!(dcr & 0x01)) printk (",N-STROBE");
  95         }
  96         printk ("]  dsr=[");
  97         if (!(dsr & 0x80)) printk ("BUSY");
  98         if (dsr & 0x40) printk (",N-ACK");
  99         if (dsr & 0x20) printk (",PERROR");
 100         if (dsr & 0x10) printk (",SELECT");
 101         if (dsr & 0x08) printk (",N-FAULT");
 102         printk ("]\n");
 103         return;
 104 }
 105 #else   /* !DEBUG_PARPORT */
 106 #define dump_parport_state(args...)
 107 #endif  /* !DEBUG_PARPORT */
 108
 109 /* __parport_pc_frob_control differs from parport_pc_frob_control in that
 110  * it doesn't do any extra masking. */
 111 static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
 112                                                            unsigned char mask,
 113                                                            unsigned char val)
 114 {
 115         struct parport_pc_private *priv = p->physport->private_data;
 116         unsigned char ctr = priv->ctr;
 117 #ifdef DEBUG_PARPORT
 118         printk (KERN_DEBUG
 119                 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
 120                 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
 121 #endif
 122         ctr = (ctr & ~mask) ^ val;
 123         ctr &= priv->ctr_writable; /* only write writable bits. */
 124         outb (ctr, CONTROL (p));
 125         priv->ctr = ctr;        /* Update soft copy */
 126         return ctr;
 127 }
 128
 129 static __inline__ void parport_pc_data_reverse (struct parport *p)
 130 {
 131         __parport_pc_frob_control (p, 0x20, 0x20);
 132 }
 133
 134 static __inline__ void parport_pc_data_forward (struct parport *p)
 135 {
 136         __parport_pc_frob_control (p, 0x20, 0x00);
 137 }
 138
 139 static __inline__ void parport_pc_write_control (struct parport *p,
 140                                                  unsigned char d)
 141 {
 142         const unsigned char wm = (PARPORT_CONTROL_STROBE |
 143                                   PARPORT_CONTROL_AUTOFD |
 144                                   PARPORT_CONTROL_INIT |
 145                                   PARPORT_CONTROL_SELECT);
 146
 147         /* Take this out when drivers have adapted to newer interface. */
 148         if (d & 0x20) {
 149                 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
 150                         p->name, p->cad->name);
 151                 parport_pc_data_reverse (p);
 152         }
 153
 154         __parport_pc_frob_control (p, wm, d & wm);
 155 }
 156
 157 static __inline__ unsigned char parport_pc_read_control(struct parport *p)
 158 {
 159         const unsigned char rm = (PARPORT_CONTROL_STROBE |
 160                                   PARPORT_CONTROL_AUTOFD |
 161                                   PARPORT_CONTROL_INIT |
 162                                   PARPORT_CONTROL_SELECT);
 163         const struct parport_pc_private *priv = p->physport->private_data;
 164         return priv->ctr & rm; /* Use soft copy */
 165 }
 166
 167 static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
 168                                                          unsigned char mask,
 169                                                          unsigned char val)
 170 {
 171         const unsigned char wm = (PARPORT_CONTROL_STROBE |
 172                                   PARPORT_CONTROL_AUTOFD |
 173                                   PARPORT_CONTROL_INIT |
 174                                   PARPORT_CONTROL_SELECT);
 175
 176         /* Take this out when drivers have adapted to newer interface. */
 177         if (mask & 0x20) {
 178                 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
 179                         p->name, p->cad->name,
 180                         (val & 0x20) ? "reverse" : "forward");
 181                 if (val & 0x20)
 182                         parport_pc_data_reverse (p);
 183                 else
 184                         parport_pc_data_forward (p);
 185         }
 186
 187         /* Restrict mask and val to control lines. */
 188         mask &= wm;
 189         val &= wm;
 190
 191         return __parport_pc_frob_control (p, mask, val);
 192 }
 193
 194 static __inline__ unsigned char parport_pc_read_status(struct parport *p)
 195 {
 196         return inb(STATUS(p));
 197 }
 198
 199
 200 static __inline__ void parport_pc_disable_irq(struct parport *p)
 201 {
 202         __parport_pc_frob_control (p, 0x10, 0x00);
 203 }
 204
 205 static __inline__ void parport_pc_enable_irq(struct parport *p)
 206 {
 207         __parport_pc_frob_control (p, 0x10, 0x10);
 208 }
 209
 210 extern void parport_pc_release_resources(struct parport *p);
 211
 212 extern int parport_pc_claim_resources(struct parport *p);
 213
 214 extern void parport_pc_init_state(struct pardevice *, struct parport_state *s);
 215
 216 extern void parport_pc_save_state(struct parport *p, struct parport_state *s);
 217
 218 extern void parport_pc_restore_state(struct parport *p, struct parport_state *s);
 219
 220 /* PCMCIA code will want to get us to look at a port.  Provide a mechanism. */
 221 extern struct parport *parport_pc_probe_port (unsigned long base,
 222                                               unsigned long base_hi,
 223                                               int irq, int dma,
 224                                               struct pci_dev *dev);
 225 extern void parport_pc_unregister_port (struct parport *p);
 226
 227 #endif