-/* $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 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;
-} sparc_ebus_dmas[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 ebus_ecpp_p(struct linux_ebus_device *edev)
-{
- if (!strcmp(edev->prom_node->name, "ecpp"))
- return 1;
- if (!strcmp(edev->prom_node->name, "parallel")) {
- const char *compat;
-
- compat = of_get_property(edev->prom_node,
- "compatible", NULL);
- if (compat &&
- (!strcmp(compat, "ecpp") ||
- !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_node->name, "dma"))
- continue;
-
- child = isa_dev->child;
- while (child) {
- if (!strcmp(child->prom_node->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->dev))
- 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->dev))
- count++;
- }
- }
- }
-
- count = parport_isa_probe(count);
-
- return count;
-}
-
-#endif /* !(_ASM_SPARC64_PARPORT_H */
+#include <asm-sparc/parport.h>
projects / linux-2.6-omap-h63xx.git / blobdiff