diff options
Diffstat (limited to 'include/asm-sparc64/parport.h')
| -rw-r--r-- | include/asm-sparc64/parport.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/include/asm-sparc64/parport.h b/include/asm-sparc64/parport.h new file mode 100644 index 0000000..ab88349 --- /dev/null +++ b/include/asm-sparc64/parport.h @@ -0,0 +1,175 @@ +/* $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 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 */ |
