LXR linux-old/include/linux/parport

   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
  18struct 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};
  43
  44static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
  45{
  46#ifdef DEBUG_PARPORT
  47        printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d);
  48#endif
  49        outb(d, DATA(p));
  50}
  51
  52static __inline__ unsigned char parport_pc_read_data(struct parport *p)
  53{
  54        unsigned char val = inb (DATA (p));
  55#ifdef DEBUG_PARPORT
  56        printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n",
  57                p, val);
  58#endif
  59        return val;
  60}
  61
  62#ifdef DEBUG_PARPORT
  63extern __inline__ void dump_parport_state (char *str, struct parport *p)
  64{
  65        /* here's hoping that reading these ports won't side-effect anything underneath */
  66        unsigned char ecr = inb (ECONTROL (p));
  67        unsigned char dcr = inb (CONTROL (p));
  68        unsigned char dsr = inb (STATUS (p));
  69        static char *ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
  70        const struct parport_pc_private *priv = (parport_pc_private *)p->physport->private_data;
  71        int i;
  72
  73        printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
  74        if (ecr & 0x10) printk (",nErrIntrEn");
  75        if (ecr & 0x08) printk (",dmaEn");
  76        if (ecr & 0x04) printk (",serviceIntr");
  77        if (ecr & 0x02) printk (",f_full");
  78        if (ecr & 0x01) printk (",f_empty");
  79        for (i=0; i<2; i++) {
  80                printk ("]  dcr(%s)=[", i ? "soft" : "hard");
  81                dcr = i ? priv->ctr : inb (CONTROL (p));
  82        
  83                if (dcr & 0x20) {
  84                        printk ("rev");
  85                } else {
  86                        printk ("fwd");
  87                }
  88                if (dcr & 0x10) printk (",ackIntEn");
  89                if (!(dcr & 0x08)) printk (",N-SELECT-IN");
  90                if (dcr & 0x04) printk (",N-INIT");
  91                if (!(dcr & 0x02)) printk (",N-AUTOFD");
  92                if (!(dcr & 0x01)) printk (",N-STROBE");
  93        }
  94        printk ("]  dsr=[");
  95        if (!(dsr & 0x80)) printk ("BUSY");
  96        if (dsr & 0x40) printk (",N-ACK");
  97        if (dsr & 0x20) printk (",PERROR");
  98        if (dsr & 0x10) printk (",SELECT");
  99        if (dsr & 0x08) printk (",N-FAULT");
 100        printk ("]\n");
 101        return;
 102}
 103#else   /* !DEBUG_PARPORT */
 104#define dump_parport_state(args...)
 105#endif  /* !DEBUG_PARPORT */
 106
 107/* __parport_pc_frob_control differs from parport_pc_frob_control in that
 108 * it doesn't do any extra masking. */
 109static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
 110                                                           unsigned char mask,
 111                                                           unsigned char val)
 112{
 113        struct parport_pc_private *priv = p->physport->private_data;
 114        unsigned char ctr = priv->ctr;
 115#ifdef DEBUG_PARPORT
 116        printk (KERN_DEBUG
 117                "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n",
 118                mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
 119#endif
 120        ctr = (ctr & ~mask) ^ val;
 121        ctr &= priv->ctr_writable; /* only write writable bits. */
 122        outb (ctr, CONTROL (p));
 123        priv->ctr = ctr;        /* Update soft copy */
 124        return ctr;
 125}
 126
 127static __inline__ void parport_pc_data_reverse (struct parport *p)
 128{
 129        __parport_pc_frob_control (p, 0x20, 0x20);
 130}
 131
 132static __inline__ void parport_pc_data_forward (struct parport *p)
 133{
 134        __parport_pc_frob_control (p, 0x20, 0x00);
 135}
 136
 137static __inline__ void parport_pc_write_control (struct parport *p,
 138                                                 unsigned char d)
 139{
 140        const unsigned char wm = (PARPORT_CONTROL_STROBE |
 141                                  PARPORT_CONTROL_AUTOFD |
 142                                  PARPORT_CONTROL_INIT |
 143                                  PARPORT_CONTROL_SELECT);
 144
 145        /* Take this out when drivers have adapted to newer interface. */
 146        if (d & 0x20) {
 147                printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
 148                        p->name, p->cad->name);
 149                parport_pc_data_reverse (p);
 150        }
 151
 152        __parport_pc_frob_control (p, wm, d & wm);
 153}
 154
 155static __inline__ unsigned char parport_pc_read_control(struct parport *p)
 156{
 157        const unsigned char rm = (PARPORT_CONTROL_STROBE |
 158                                  PARPORT_CONTROL_AUTOFD |
 159                                  PARPORT_CONTROL_INIT |
 160                                  PARPORT_CONTROL_SELECT);
 161        const struct parport_pc_private *priv = p->physport->private_data;
 162        return priv->ctr & rm; /* Use soft copy */
 163}
 164
 165static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
 166                                                         unsigned char mask,
 167                                                         unsigned char val)
 168{
 169        const unsigned char wm = (PARPORT_CONTROL_STROBE |
 170                                  PARPORT_CONTROL_AUTOFD |
 171                                  PARPORT_CONTROL_INIT |
 172                                  PARPORT_CONTROL_SELECT);
 173
 174        /* Take this out when drivers have adapted to newer interface. */
 175        if (mask & 0x20) {
 176                printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
 177                        p->name, p->cad->name,
 178                        (val & 0x20) ? "reverse" : "forward");
 179                if (val & 0x20)
 180                        parport_pc_data_reverse (p);
 181                else
 182                        parport_pc_data_forward (p);
 183        }
 184
 185        /* Restrict mask and val to control lines. */
 186        mask &= wm;
 187        val &= wm;
 188
 189        return __parport_pc_frob_control (p, mask, val);
 190}
 191
 192static __inline__ unsigned char parport_pc_read_status(struct parport *p)
 193{
 194        return inb(STATUS(p));
 195}
 196
 197
 198static __inline__ void parport_pc_disable_irq(struct parport *p)
 199{
 200        __parport_pc_frob_control (p, 0x10, 0x00);
 201}
 202
 203static __inline__ void parport_pc_enable_irq(struct parport *p)
 204{
 205        __parport_pc_frob_control (p, 0x10, 0x10);
 206}
 207
 208extern void parport_pc_release_resources(struct parport *p);
 209
 210extern int parport_pc_claim_resources(struct parport *p);
 211
 212extern void parport_pc_init_state(struct pardevice *, struct parport_state *s);
 213
 214extern void parport_pc_save_state(struct parport *p, struct parport_state *s);
 215
 216extern void parport_pc_restore_state(struct parport *p, struct parport_state *s);
 217
 218extern void parport_pc_inc_use_count(void);
 219
 220extern void parport_pc_dec_use_count(void);
 221
 222/* PCMCIA code will want to get us to look at a port.  Provide a mechanism. */
 223extern struct parport *parport_pc_probe_port (unsigned long base,
 224                                              unsigned long base_hi,
 225                                              int irq, int dma,
 226                                              struct pci_dev *dev);
 227extern void parport_pc_unregister_port (struct parport *p);
 228
 229#endif
 230