include/asm-sparc64/parport.h

   1 /* $Id: parport.h,v 1.11 2001/05/11 07:54:24 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/isa.h>
  12 #include <asm/ns87303.h>
  13
  14 #define PARPORT_PC_MAX_PORTS    PARPORT_MAX
  15
  16 static struct sparc_ebus_info {
  17         struct ebus_dma_info info;
  18         unsigned int addr;
  19         unsigned int count;
  20 } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
  21
  22 static __inline__ void enable_dma(unsigned int dmanr)
  23 {
  24         if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
  25                              sparc_ebus_dmas[dmanr].addr,
  26                              sparc_ebus_dmas[dmanr].count))
  27                 BUG();
  28
  29         ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
  30 }
  31
  32 static __inline__ void disable_dma(unsigned int dmanr)
  33 {
  34         ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
  35 }
  36
  37 static __inline__ void clear_dma_ff(unsigned int dmanr)
  38 {
  39         /* nothing */
  40 }
  41
  42 static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
  43 {
  44         ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
  45 }
  46
  47 static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
  48 {
  49         sparc_ebus_dmas[dmanr].addr = addr;
  50 }
  51
  52 static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
  53 {
  54         sparc_ebus_dmas[dmanr].count = count;
  55 }
  56
  57 static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
  58 {
  59         return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
  60 }
  61
  62 static int ebus_ecpp_p(struct linux_ebus_device *edev)
  63 {
  64         if (!strcmp(edev->prom_name, "ecpp"))
  65                 return 1;
  66         if (!strcmp(edev->prom_name, "parallel")) {
  67                 char compat[19];
  68                 prom_getstring(edev->prom_node,
  69                                "compatible",
  70                                compat, sizeof(compat));
  71                 compat[18] = '\0';
  72                 if (!strcmp(compat, "ecpp"))
  73                         return 1;
  74                 if (!strcmp(compat, "ns87317-ecpp") &&
  75                     !strcmp(compat + 13, "ecpp"))
  76                         return 1;
  77         }
  78         return 0;
  79 }
  80
  81 static int parport_isa_probe(int count)
  82 {
  83         struct sparc_isa_bridge *isa_br;
  84         struct sparc_isa_device *isa_dev;
  85
  86         for_each_isa(isa_br) {
  87                 for_each_isadev(isa_dev, isa_br) {
  88                         struct sparc_isa_device *child;
  89                         unsigned long base;
  90
  91                         if (strcmp(isa_dev->prom_name, "dma"))
  92                                 continue;
  93
  94                         child = isa_dev->child;
  95                         while (child) {
  96                                 if (!strcmp(child->prom_name, "parallel"))
  97                                         break;
  98                                 child = child->next;
  99                         }
 100                         if (!child)
 101                                 continue;
 102
 103                         base = child->resource.start;
 104
 105                         /* No DMA, see commentary in
 106                          * asm-sparc64/floppy.h:isa_floppy_init()
 107                          */
 108                         if (parport_pc_probe_port(base, base + 0x400,
 109                                                   child->irq, PARPORT_DMA_NOFIFO,
 110                                                   child->bus->self))
 111                                 count++;
 112                 }
 113         }
 114
 115         return count;
 116 }
 117
 118 static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
 119 {
 120         struct linux_ebus *ebus;
 121         struct linux_ebus_device *edev;
 122         int count = 0;
 123
 124         for_each_ebus(ebus) {
 125                 for_each_ebusdev(edev, ebus) {
 126                         if (ebus_ecpp_p(edev)) {
 127                                 unsigned long base = edev->resource[0].start;
 128                                 unsigned long config = edev->resource[1].start;
 129                                 unsigned long d_base = edev->resource[2].start;
 130                                 unsigned long d_len;
 131
 132                                 spin_lock_init(&sparc_ebus_dmas[count].info.lock);
 133                                 d_len = (edev->resource[2].end -
 134                                          d_base) + 1;
 135                                 sparc_ebus_dmas[count].info.regs =
 136                                         ioremap(d_base, d_len);
 137                                 if (!sparc_ebus_dmas[count].info.regs)
 138                                         continue;
 139                                 sparc_ebus_dmas[count].info.flags = 0;
 140                                 sparc_ebus_dmas[count].info.callback = NULL;
 141                                 sparc_ebus_dmas[count].info.client_cookie = NULL;
 142                                 sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
 143                                 strcpy(sparc_ebus_dmas[count].info.name, "parport");
 144                                 if (ebus_dma_register(&sparc_ebus_dmas[count].info))
 145                                         continue;
 146                                 ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);
 147
 148                                 /* Configure IRQ to Push Pull, Level Low */
 149                                 /* Enable ECP, set bit 2 of the CTR first */
 150                                 outb(0x04, base + 0x02);
 151                                 ns87303_modify(config, PCR,
 152                                                PCR_EPP_ENABLE |
 153                                                PCR_IRQ_ODRAIN,
 154                                                PCR_ECP_ENABLE |
 155                                                PCR_ECP_CLK_ENA |
 156                                                PCR_IRQ_POLAR);
 157
 158                                 /* CTR bit 5 controls direction of port */
 159                                 ns87303_modify(config, PTR,
 160                                                0, PTR_LPT_REG_DIR);
 161
 162                                 if (parport_pc_probe_port(base, base + 0x400,
 163                                                           edev->irqs[0],
 164                                                           count, ebus->self))
 165                                         count++;
 166                         }
 167                 }
 168         }
 169
 170         count = parport_isa_probe(count);
 171
 172         return count;
 173 }
 174
 175 #endif /* !(_ASM_SPARC64_PARPORT_H */