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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
static struct linux_ebus_dma *sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
static __inline__ void
reset_dma(unsigned int dmanr)
{
unsigned int dcsr;
writel(EBUS_DCSR_RESET, &sparc_ebus_dmas[dmanr]->dcsr);
udelay(1);
dcsr = EBUS_DCSR_BURST_SZ_16 | EBUS_DCSR_TCI_DIS |
EBUS_DCSR_EN_CNT | EBUS_DCSR_INT_EN;
writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
}
static __inline__ void
enable_dma(unsigned int dmanr)
{
unsigned int dcsr;
dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
dcsr |= EBUS_DCSR_EN_DMA;
writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
}
static __inline__ void
disable_dma(unsigned int dmanr)
{
unsigned int dcsr;
dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
if (dcsr & EBUS_DCSR_EN_DMA) {
while (dcsr & EBUS_DCSR_DRAIN) {
udelay(1);
dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
}
dcsr &= ~(EBUS_DCSR_EN_DMA);
writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
if (dcsr & EBUS_DCSR_ERR_PEND)
reset_dma(dmanr);
}
}
static __inline__ void
clear_dma_ff(unsigned int dmanr)
{
/* nothing */
}
static __inline__ void
set_dma_mode(unsigned int dmanr, char mode)
{
unsigned int dcsr;
dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
dcsr |= EBUS_DCSR_EN_CNT | EBUS_DCSR_TC;
if (mode == DMA_MODE_WRITE)
dcsr &= ~(EBUS_DCSR_WRITE);
else
dcsr |= EBUS_DCSR_WRITE;
writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
}
static __inline__ void
set_dma_addr(unsigned int dmanr, unsigned int addr)
{
writel(addr, &sparc_ebus_dmas[dmanr]->dacr);
}
static __inline__ void
set_dma_count(unsigned int dmanr, unsigned int count)
{
writel(count, &sparc_ebus_dmas[dmanr]->dbcr);
}
static __inline__ int
get_dma_residue(unsigned int dmanr)
{
int res;
res = readl(&sparc_ebus_dmas[dmanr]->dbcr);
if (res != 0)
reset_dma(dmanr);
return res;
}
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 isa_bridge *isa_br;
struct isa_device *isa_dev;
for_each_isa(isa_br) {
for_each_isadev(isa_dev, isa_br) {
struct 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;
if (!pci_present())
return 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;
sparc_ebus_dmas[count] =
(struct linux_ebus_dma *)
edev->resource[2].start;
reset_dma(count);
/* 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 */
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