include/asm-sparc64/parport.h

   1 /* $Id: parport.h,v 1.9 2000/03/16 07:47:27 davem Exp $
   2  * parport.h: sparc64 specific parport initialization and dma.
   3  *
   4  * Copyright (C) 1999  Eddie C. Dost  (ecd@skynet.be)
   5  */
   6
   7 #ifndef _ASM_SPARC64_PARPORT_H
   8 #define _ASM_SPARC64_PARPORT_H 1
   9
  10 #include <asm/ebus.h>
  11 #include <asm/ns87303.h>
  12
  13 #define PARPORT_PC_MAX_PORTS    PARPORT_MAX
  14
  15 static struct linux_ebus_dma *sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
  16
  17 static __inline__ void
  18 reset_dma(unsigned int dmanr)
  19 {
  20         unsigned int dcsr;
  21
  22         writel(EBUS_DCSR_RESET, &sparc_ebus_dmas[dmanr]->dcsr);
  23         udelay(1);
  24         dcsr = EBUS_DCSR_BURST_SZ_16 | EBUS_DCSR_TCI_DIS |
  25                EBUS_DCSR_EN_CNT | EBUS_DCSR_INT_EN;
  26         writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
  27 }
  28
  29 static __inline__ void
  30 enable_dma(unsigned int dmanr)
  31 {
  32         unsigned int dcsr;
  33
  34         dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
  35         dcsr |= EBUS_DCSR_EN_DMA;
  36         writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
  37 }
  38
  39 static __inline__ void
  40 disable_dma(unsigned int dmanr)
  41 {
  42         unsigned int dcsr;
  43
  44         dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
  45         if (dcsr & EBUS_DCSR_EN_DMA) {
  46                 while (dcsr & EBUS_DCSR_DRAIN) {
  47                         udelay(1);
  48                         dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
  49                 }
  50                 dcsr &= ~(EBUS_DCSR_EN_DMA);
  51                 writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
  52
  53                 dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
  54                 if (dcsr & EBUS_DCSR_ERR_PEND)
  55                         reset_dma(dmanr);
  56         }
  57 }
  58
  59 static __inline__ void
  60 clear_dma_ff(unsigned int dmanr)
  61 {
  62         /* nothing */
  63 }
  64
  65 static __inline__ void
  66 set_dma_mode(unsigned int dmanr, char mode)
  67 {
  68         unsigned int dcsr;
  69
  70         dcsr = readl(&sparc_ebus_dmas[dmanr]->dcsr);
  71         dcsr |= EBUS_DCSR_EN_CNT | EBUS_DCSR_TC;
  72         if (mode == DMA_MODE_WRITE)
  73                 dcsr &= ~(EBUS_DCSR_WRITE);
  74         else
  75                 dcsr |= EBUS_DCSR_WRITE;
  76         writel(dcsr, &sparc_ebus_dmas[dmanr]->dcsr);
  77 }
  78
  79 static __inline__ void
  80 set_dma_addr(unsigned int dmanr, unsigned int addr)
  81 {
  82         writel(addr, &sparc_ebus_dmas[dmanr]->dacr);
  83 }
  84
  85 static __inline__ void
  86 set_dma_count(unsigned int dmanr, unsigned int count)
  87 {
  88         writel(count, &sparc_ebus_dmas[dmanr]->dbcr);
  89 }
  90
  91 static __inline__ int
  92 get_dma_residue(unsigned int dmanr)
  93 {
  94         int res;
  95
  96         res = readl(&sparc_ebus_dmas[dmanr]->dbcr);
  97         if (res != 0)
  98                 reset_dma(dmanr);
  99         return res;
 100 }
 101
 102 static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
 103 {
 104         struct linux_ebus *ebus;
 105         struct linux_ebus_device *edev;
 106         int count = 0;
 107
 108         if (!pci_present())
 109                 return 0;
 110
 111         for_each_ebus(ebus) {
 112                 for_each_ebusdev(edev, ebus) {
 113                         if (!strcmp(edev->prom_name, "ecpp")) {
 114                                 unsigned long base = edev->resource[0].start;
 115                                 unsigned long config = edev->resource[1].start;
 116
 117                                 sparc_ebus_dmas[count] =
 118                                                 (struct linux_ebus_dma *)
 119                                                         edev->resource[2].start;
 120                                 reset_dma(count);
 121
 122                                 /* Configure IRQ to Push Pull, Level Low */
 123                                 /* Enable ECP, set bit 2 of the CTR first */
 124                                 outb(0x04, base + 0x02);
 125                                 ns87303_modify(config, PCR,
 126                                                PCR_EPP_ENABLE |
 127                                                PCR_IRQ_ODRAIN,
 128                                                PCR_ECP_ENABLE |
 129                                                PCR_ECP_CLK_ENA |
 130                                                PCR_IRQ_POLAR);
 131
 132                                 /* CTR bit 5 controls direction of port */
 133                                 ns87303_modify(config, PTR,
 134                                                0, PTR_LPT_REG_DIR);
 135
 136                                 if (parport_pc_probe_port(base, base + 0x400,
 137                                                           edev->irqs[0],
 138                                                           count, ebus->self))
 139                                         count++;
 140                         }
 141                 }
 142         }
 143
 144         return count;
 145 }
 146
 147 #endif /* !(_ASM_SPARC64_PARPORT_H */