247 lines
5.5 KiB
C
247 lines
5.5 KiB
C
/* 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/ns87303.h>
|
|
#include <asm/of_device.h>
|
|
#include <asm/prom.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 DEFINE_SPINLOCK(dma_spin_lock);
|
|
|
|
#define claim_dma_lock() \
|
|
({ unsigned long flags; \
|
|
spin_lock_irqsave(&dma_spin_lock, flags); \
|
|
flags; \
|
|
})
|
|
|
|
#define release_dma_lock(__flags) \
|
|
spin_unlock_irqrestore(&dma_spin_lock, __flags);
|
|
|
|
static struct sparc_ebus_info {
|
|
struct ebus_dma_info info;
|
|
unsigned int addr;
|
|
unsigned int count;
|
|
int lock;
|
|
|
|
struct parport *port;
|
|
} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
|
|
|
|
static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS);
|
|
|
|
static inline int request_dma(unsigned int dmanr, const char *device_id)
|
|
{
|
|
if (dmanr >= PARPORT_PC_MAX_PORTS)
|
|
return -EINVAL;
|
|
if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0)
|
|
return -EBUSY;
|
|
return 0;
|
|
}
|
|
|
|
static inline void free_dma(unsigned int dmanr)
|
|
{
|
|
if (dmanr >= PARPORT_PC_MAX_PORTS) {
|
|
printk(KERN_WARNING "Trying to free DMA%d\n", dmanr);
|
|
return;
|
|
}
|
|
if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) {
|
|
printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static inline void enable_dma(unsigned int dmanr)
|
|
{
|
|
ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
|
|
|
|
if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
|
|
sparc_ebus_dmas[dmanr].addr,
|
|
sparc_ebus_dmas[dmanr].count))
|
|
BUG();
|
|
}
|
|
|
|
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 __devinit ecpp_probe(struct of_device *op, const struct of_device_id *match)
|
|
{
|
|
unsigned long base = op->resource[0].start;
|
|
unsigned long config = op->resource[1].start;
|
|
unsigned long d_base = op->resource[2].start;
|
|
unsigned long d_len;
|
|
struct device_node *parent;
|
|
struct parport *p;
|
|
int slot, err;
|
|
|
|
parent = op->node->parent;
|
|
if (!strcmp(parent->name, "dma")) {
|
|
p = parport_pc_probe_port(base, base + 0x400,
|
|
op->irqs[0], PARPORT_DMA_NOFIFO,
|
|
op->dev.parent->parent);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
dev_set_drvdata(&op->dev, p);
|
|
return 0;
|
|
}
|
|
|
|
for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) {
|
|
if (!test_and_set_bit(slot, dma_slot_map))
|
|
break;
|
|
}
|
|
err = -ENODEV;
|
|
if (slot >= PARPORT_PC_MAX_PORTS)
|
|
goto out_err;
|
|
|
|
spin_lock_init(&sparc_ebus_dmas[slot].info.lock);
|
|
|
|
d_len = (op->resource[2].end - d_base) + 1UL;
|
|
sparc_ebus_dmas[slot].info.regs =
|
|
of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA");
|
|
|
|
if (!sparc_ebus_dmas[slot].info.regs)
|
|
goto out_clear_map;
|
|
|
|
sparc_ebus_dmas[slot].info.flags = 0;
|
|
sparc_ebus_dmas[slot].info.callback = NULL;
|
|
sparc_ebus_dmas[slot].info.client_cookie = NULL;
|
|
sparc_ebus_dmas[slot].info.irq = 0xdeadbeef;
|
|
strcpy(sparc_ebus_dmas[slot].info.name, "parport");
|
|
if (ebus_dma_register(&sparc_ebus_dmas[slot].info))
|
|
goto out_unmap_regs;
|
|
|
|
ebus_dma_irq_enable(&sparc_ebus_dmas[slot].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);
|
|
|
|
p = parport_pc_probe_port(base, base + 0x400,
|
|
op->irqs[0],
|
|
slot,
|
|
op->dev.parent);
|
|
err = -ENOMEM;
|
|
if (!p)
|
|
goto out_disable_irq;
|
|
|
|
dev_set_drvdata(&op->dev, p);
|
|
|
|
return 0;
|
|
|
|
out_disable_irq:
|
|
ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
|
|
ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
|
|
|
|
out_unmap_regs:
|
|
of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len);
|
|
|
|
out_clear_map:
|
|
clear_bit(slot, dma_slot_map);
|
|
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit ecpp_remove(struct of_device *op)
|
|
{
|
|
struct parport *p = dev_get_drvdata(&op->dev);
|
|
int slot = p->dma;
|
|
|
|
parport_pc_unregister_port(p);
|
|
|
|
if (slot != PARPORT_DMA_NOFIFO) {
|
|
unsigned long d_base = op->resource[2].start;
|
|
unsigned long d_len;
|
|
|
|
d_len = (op->resource[2].end - d_base) + 1UL;
|
|
|
|
ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0);
|
|
ebus_dma_unregister(&sparc_ebus_dmas[slot].info);
|
|
of_iounmap(&op->resource[2],
|
|
sparc_ebus_dmas[slot].info.regs,
|
|
d_len);
|
|
clear_bit(slot, dma_slot_map);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct of_device_id ecpp_match[] = {
|
|
{
|
|
.name = "ecpp",
|
|
},
|
|
{
|
|
.name = "parallel",
|
|
.compatible = "ecpp",
|
|
},
|
|
{
|
|
.name = "parallel",
|
|
.compatible = "ns87317-ecpp",
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct of_platform_driver ecpp_driver = {
|
|
.name = "ecpp",
|
|
.match_table = ecpp_match,
|
|
.probe = ecpp_probe,
|
|
.remove = __devexit_p(ecpp_remove),
|
|
};
|
|
|
|
static int parport_pc_find_nonpci_ports(int autoirq, int autodma)
|
|
{
|
|
of_register_driver(&ecpp_driver, &of_bus_type);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* !(_ASM_SPARC64_PARPORT_H */
|