mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 07:36:43 +07:00
51dcdfec6a
PCI parallel port devices can IRQ share so we should stop them hogging the line and making a mess on modern PC systems. We know the sharing side works as the PCMCIA driver has shared the parallel port IRQ for some time. Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
239 lines
6.5 KiB
C
239 lines
6.5 KiB
C
#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
|