diff options
Diffstat (limited to 'kernel/include/linux/parport_pc.h')
| -rw-r--r-- | kernel/include/linux/parport_pc.h | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/kernel/include/linux/parport_pc.h b/kernel/include/linux/parport_pc.h new file mode 100644 index 000000000..cc1767f5c --- /dev/null +++ b/kernel/include/linux/parport_pc.h @@ -0,0 +1,238 @@ +#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 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%02x\n", + p, val); +#endif + return val; +} + +#ifdef DEBUG_PARPORT +static 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 const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"}; + const struct parport_pc_private *priv = 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 -> %02x\n", + 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 device *dev, + int irqflags); +extern void parport_pc_unregister_port(struct parport *p); + +#endif |