| /* $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 */ |