/* $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")) { 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)) 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 */