parport_pc.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:7k
- #ifndef __LINUX_PARPORT_PC_H
- #define __LINUX_PARPORT_PC_H
- #include <asm/io.h>
- /* --- register definitions ------------------------------- */
- #define ECONTROL(p) ((p)->base_hi + 0x2)
- #define CONFIGB(p) ((p)->base_hi + 0x1)
- #define CONFIGA(p) ((p)->base_hi + 0x0)
- #define FIFO(p) ((p)->base_hi + 0x0)
- #define EPPDATA(p) ((p)->base + 0x4)
- #define EPPADDR(p) ((p)->base + 0x3)
- #define CONTROL(p) ((p)->base + 0x2)
- #define STATUS(p) ((p)->base + 0x1)
- #define DATA(p) ((p)->base + 0x0)
- struct parport_pc_private {
- /* Contents of CTR. */
- unsigned char ctr;
- /* Bitmask of writable CTR bits. */
- unsigned char ctr_writable;
- /* Whether or not there's an ECR. */
- int ecr;
- /* Number of PWords that FIFO will hold. */
- int fifo_depth;
- /* Number of bytes per portword. */
- int pword;
- /* Not used yet. */
- int readIntrThreshold;
- int writeIntrThreshold;
- /* buffer suitable for DMA, if DMA enabled */
- char *dma_buf;
- dma_addr_t dma_handle;
- struct pci_dev *dev;
- struct list_head list;
- struct parport *port;
- };
- struct parport_pc_via_data
- {
- /* ISA PnP IRQ routing register 1 */
- u8 via_pci_parport_irq_reg;
- /* ISA PnP DMA request routing register */
- u8 via_pci_parport_dma_reg;
- /* Register and value to enable SuperIO configuration access */
- u8 via_pci_superio_config_reg;
- u8 via_pci_superio_config_data;
- /* SuperIO function register number */
- u8 viacfg_function;
- /* parallel port control register number */
- u8 viacfg_parport_control;
- /* Parallel port base address register */
- u8 viacfg_parport_base;
- };
- static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d)
- {
- #ifdef DEBUG_PARPORT
- printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)n", p, d);
- #endif
- outb(d, DATA(p));
- }
- static __inline__ unsigned char parport_pc_read_data(struct parport *p)
- {
- unsigned char val = inb (DATA (p));
- #ifdef DEBUG_PARPORT
- printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02xn",
- p, val);
- #endif
- return val;
- }
- #ifdef DEBUG_PARPORT
- extern __inline__ void dump_parport_state (char *str, struct parport *p)
- {
- /* here's hoping that reading these ports won't side-effect anything underneath */
- unsigned char ecr = inb (ECONTROL (p));
- unsigned char dcr = inb (CONTROL (p));
- unsigned char dsr = inb (STATUS (p));
- static char *ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"};
- const struct parport_pc_private *priv = (parport_pc_private *)p->physport->private_data;
- int i;
- printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]);
- if (ecr & 0x10) printk (",nErrIntrEn");
- if (ecr & 0x08) printk (",dmaEn");
- if (ecr & 0x04) printk (",serviceIntr");
- if (ecr & 0x02) printk (",f_full");
- if (ecr & 0x01) printk (",f_empty");
- for (i=0; i<2; i++) {
- printk ("] dcr(%s)=[", i ? "soft" : "hard");
- dcr = i ? priv->ctr : inb (CONTROL (p));
-
- if (dcr & 0x20) {
- printk ("rev");
- } else {
- printk ("fwd");
- }
- if (dcr & 0x10) printk (",ackIntEn");
- if (!(dcr & 0x08)) printk (",N-SELECT-IN");
- if (dcr & 0x04) printk (",N-INIT");
- if (!(dcr & 0x02)) printk (",N-AUTOFD");
- if (!(dcr & 0x01)) printk (",N-STROBE");
- }
- printk ("] dsr=[");
- if (!(dsr & 0x80)) printk ("BUSY");
- if (dsr & 0x40) printk (",N-ACK");
- if (dsr & 0x20) printk (",PERROR");
- if (dsr & 0x10) printk (",SELECT");
- if (dsr & 0x08) printk (",N-FAULT");
- printk ("]n");
- return;
- }
- #else /* !DEBUG_PARPORT */
- #define dump_parport_state(args...)
- #endif /* !DEBUG_PARPORT */
- /* __parport_pc_frob_control differs from parport_pc_frob_control in that
- * it doesn't do any extra masking. */
- static __inline__ unsigned char __parport_pc_frob_control (struct parport *p,
- unsigned char mask,
- unsigned char val)
- {
- struct parport_pc_private *priv = p->physport->private_data;
- unsigned char ctr = priv->ctr;
- #ifdef DEBUG_PARPORT
- printk (KERN_DEBUG
- "__parport_pc_frob_control(%02x,%02x): %02x -> %02xn",
- mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
- #endif
- ctr = (ctr & ~mask) ^ val;
- ctr &= priv->ctr_writable; /* only write writable bits. */
- outb (ctr, CONTROL (p));
- priv->ctr = ctr; /* Update soft copy */
- return ctr;
- }
- static __inline__ void parport_pc_data_reverse (struct parport *p)
- {
- __parport_pc_frob_control (p, 0x20, 0x20);
- }
- static __inline__ void parport_pc_data_forward (struct parport *p)
- {
- __parport_pc_frob_control (p, 0x20, 0x00);
- }
- static __inline__ void parport_pc_write_control (struct parport *p,
- unsigned char d)
- {
- const unsigned char wm = (PARPORT_CONTROL_STROBE |
- PARPORT_CONTROL_AUTOFD |
- PARPORT_CONTROL_INIT |
- PARPORT_CONTROL_SELECT);
- /* Take this out when drivers have adapted to newer interface. */
- if (d & 0x20) {
- printk (KERN_DEBUG "%s (%s): use data_reverse for this!n",
- p->name, p->cad->name);
- parport_pc_data_reverse (p);
- }
- __parport_pc_frob_control (p, wm, d & wm);
- }
- static __inline__ unsigned char parport_pc_read_control(struct parport *p)
- {
- const unsigned char rm = (PARPORT_CONTROL_STROBE |
- PARPORT_CONTROL_AUTOFD |
- PARPORT_CONTROL_INIT |
- PARPORT_CONTROL_SELECT);
- const struct parport_pc_private *priv = p->physport->private_data;
- return priv->ctr & rm; /* Use soft copy */
- }
- static __inline__ unsigned char parport_pc_frob_control (struct parport *p,
- unsigned char mask,
- unsigned char val)
- {
- const unsigned char wm = (PARPORT_CONTROL_STROBE |
- PARPORT_CONTROL_AUTOFD |
- PARPORT_CONTROL_INIT |
- PARPORT_CONTROL_SELECT);
- /* Take this out when drivers have adapted to newer interface. */
- if (mask & 0x20) {
- printk (KERN_DEBUG "%s (%s): use data_%s for this!n",
- p->name, p->cad->name,
- (val & 0x20) ? "reverse" : "forward");
- if (val & 0x20)
- parport_pc_data_reverse (p);
- else
- parport_pc_data_forward (p);
- }
- /* Restrict mask and val to control lines. */
- mask &= wm;
- val &= wm;
- return __parport_pc_frob_control (p, mask, val);
- }
- static __inline__ unsigned char parport_pc_read_status(struct parport *p)
- {
- return inb(STATUS(p));
- }
- static __inline__ void parport_pc_disable_irq(struct parport *p)
- {
- __parport_pc_frob_control (p, 0x10, 0x00);
- }
- static __inline__ void parport_pc_enable_irq(struct parport *p)
- {
- __parport_pc_frob_control (p, 0x10, 0x10);
- }
- extern void parport_pc_release_resources(struct parport *p);
- extern int parport_pc_claim_resources(struct parport *p);
- /* PCMCIA code will want to get us to look at a port. Provide a mechanism. */
- extern struct parport *parport_pc_probe_port (unsigned long base,
- unsigned long base_hi,
- int irq, int dma,
- struct pci_dev *dev);
- extern void parport_pc_unregister_port (struct parport *p);
- #endif