parport.h
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/* $Id: parport.h,v 1.11 2001/05/11 07:54:24 davem Exp $
* parport.h: sparc64 specific parport initialization and dma.
*
* Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
*/
#ifndef _ASM_SPARC64_PARPORT_H
#define _ASM_SPARC64_PARPORT_H 1
#include <asm/ebus.h>
#include <asm/isa.h>
#include <asm/ns87303.h>
#define PARPORT_PC_MAX_PORTS PARPORT_MAX
/*
* While sparc64 doesn't have an ISA DMA API, we provide something that looks
* close enough to make parport_pc happy
*/
#define HAS_DMA
static struct sparc_ebus_info {
struct ebus_dma_info info;
unsigned int addr;
unsigned int count;
} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
static __inline__ void enable_dma(unsigned int dmanr)
{
if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
sparc_ebus_dmas[dmanr].addr,
sparc_ebus_dmas[dmanr].count))
BUG();
ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
}
static __inline__ void disable_dma(unsigned int dmanr)
{
ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
}
static __inline__ void clear_dma_ff(unsigned int dmanr)
{
/* nothing */
}
static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
{
ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
}
static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
{
sparc_ebus_dmas[dmanr].addr = addr;
}
static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
{
sparc_ebus_dmas[dmanr].count = count;
}
static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
{
return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
}
static int ebus_ecpp_p(struct linux_ebus_device *edev)
{
if (!strcmp(edev->prom_name, "ecpp"))
return 1;
if (!strcmp(edev->prom_name, "parallel")) {
char compat[19];
prom_getstring(edev->prom_node,
"compatible",
compat, sizeof(compat));
compat[18] = '\0';
if (!strcmp(compat, "ecpp"))
return 1;
if (!strcmp(compat, "ns87317-ecpp") &&
!strcmp(compat + 13, "ecpp"))
return 1;
}
return 0;
}
static int parport_isa_probe(int count)
{
struct sparc_isa_bridge *isa_br;
struct sparc_isa_device *isa_dev;
for_each_isa(isa_br) {
for_each_isadev(isa_dev, isa_br) {
struct sparc_isa_device *child;
unsigned long base;
if (strcmp(isa_dev->prom_name, "dma"))
continue;
child = isa_dev->child;
while (child) {
if (!strcmp(child->prom_name, "parallel"))
break;
child = child->next;
}
if (!child)
continue;
base = child->resource.start;
/* No DMA, see commentary in
* asm-sparc64/floppy.h:isa_floppy_init()
*/
if (parport_pc_probe_port(base, base + 0x400,
child->irq, PARPORT_DMA_NOFIFO,
child->bus->self))
count++;
}
}
return count;
}
static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
{
struct linux_ebus *ebus;
struct linux_ebus_device *edev;
int count = 0;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (ebus_ecpp_p(edev)) {
unsigned long base = edev->resource[0].start;
unsigned long config = edev->resource[1].start;
unsigned long d_base = edev->resource[2].start;
unsigned long d_len;
spin_lock_init(&sparc_ebus_dmas[count].info.lock);
d_len = (edev->resource[2].end -
d_base) + 1;
sparc_ebus_dmas[count].info.regs =
ioremap(d_base, d_len);
if (!sparc_ebus_dmas[count].info.regs)
continue;
sparc_ebus_dmas[count].info.flags = 0;
sparc_ebus_dmas[count].info.callback = NULL;
sparc_ebus_dmas[count].info.client_cookie = NULL;
sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
strcpy(sparc_ebus_dmas[count].info.name, "parport");
if (ebus_dma_register(&sparc_ebus_dmas[count].info))
continue;
ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);
/* Configure IRQ to Push Pull, Level Low */
/* Enable ECP, set bit 2 of the CTR first */
outb(0x04, base + 0x02);
ns87303_modify(config, PCR,
PCR_EPP_ENABLE |
PCR_IRQ_ODRAIN,
PCR_ECP_ENABLE |
PCR_ECP_CLK_ENA |
PCR_IRQ_POLAR);
/* CTR bit 5 controls direction of port */
ns87303_modify(config, PTR,
0, PTR_LPT_REG_DIR);
if (parport_pc_probe_port(base, base + 0x400,
edev->irqs[0],
count, ebus->self))
count++;
}
}
}
count = parport_isa_probe(count);
return count;
}
#endif /* !(_ASM_SPARC64_PARPORT_H */