LXR linux-old/drivers/pcmcia/sa1100

   1/*
   2 * drivers/pcmcia/sa1100_simpad.c
   3 *
   4 * PCMCIA implementation routines for simpad
   5 *
   6 */
   7#include <linux/kernel.h>
   8#include <linux/sched.h>
   9
  10#include <asm/hardware.h>
  11#include <asm/irq.h>
  12#include "sa1100_generic.h"
  13 
  14extern long get_cs3_shadow(void);
  15extern void set_cs3_bit(int value); 
  16extern void clear_cs3_bit(int value);
  17
  18
  19static int simpad_pcmcia_init(struct pcmcia_init *init){
  20  int irq, res;
  21
  22  set_cs3_bit(PCMCIA_RESET);
  23  clear_cs3_bit(PCMCIA_BUFF_DIS);
  24  clear_cs3_bit(PCMCIA_RESET);
  25
  26  clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  27
  28  /* Set transition detect */
  29  set_GPIO_IRQ_edge( GPIO_CF_CD, GPIO_NO_EDGES );
  30  set_GPIO_IRQ_edge( GPIO_CF_IRQ, GPIO_FALLING_EDGE );
  31
  32  /* Register interrupts */
  33  irq = IRQ_GPIO_CF_CD;
  34  res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_CD", NULL );
  35  if( res < 0 ) goto irq_err;
  36
  37  /* There's only one slot, but it's "Slot 1": */
  38  return 2;
  39
  40irq_err:
  41  printk( KERN_ERR "%s: Request for IRQ %lu failed\n", __FUNCTION__, irq );
  42  return -1;
  43}
  44
  45static int simpad_pcmcia_shutdown(void)
  46{
  47  /* disable IRQs */
  48  free_irq( IRQ_GPIO_CF_CD, NULL );
  49  
  50  /* Disable CF bus: */
  51  
  52  //set_cs3_bit(PCMCIA_BUFF_DIS);
  53  clear_cs3_bit(PCMCIA_RESET);       
  54  
  55  return 0;
  56}
  57
  58static int simpad_pcmcia_socket_state(struct pcmcia_state_array
  59                                       *state_array)
  60{
  61  unsigned long levels;
  62  unsigned long *cs3reg = CS3_BASE;
  63
  64  if(state_array->size<2) return -1;
  65
  66  memset(state_array->state, 0, 
  67         (state_array->size)*sizeof(struct pcmcia_state));
  68
  69  levels=GPLR;
  70
  71  state_array->state[1].detect=((levels & GPIO_CF_CD)==0)?1:0;
  72
  73  state_array->state[1].ready=(levels & GPIO_CF_IRQ)?1:0;
  74
  75  state_array->state[1].bvd1=1; /* Not available on Simpad. */
  76
  77  state_array->state[1].bvd2=1; /* Not available on Simpad. */
  78
  79  state_array->state[1].wrprot=0; /* Not available on Simpad. */
  80
  81  
  82  if((*cs3reg & 0x0c) == 0x0c) {
  83    state_array->state[1].vs_3v=0;
  84    state_array->state[1].vs_Xv=0;
  85  } else
  86  {
  87    state_array->state[1].vs_3v=1;
  88    state_array->state[1].vs_Xv=0;
  89  }
  90  return 1;
  91}
  92
  93static int simpad_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
  94
  95  if(info->sock>1) return -1;
  96
  97  if(info->sock==1)
  98    info->irq=IRQ_GPIO_CF_IRQ;
  99
 100  return 0;
 101}
 102
 103static int simpad_pcmcia_configure_socket(const struct pcmcia_configure
 104                                           *configure)
 105{
 106  unsigned long value, flags;
 107
 108  if(configure->sock>1) return -1;
 109
 110  if(configure->sock==0) return 0;
 111
 112  save_flags_cli(flags);
 113
 114  /* Murphy: see table of MIC2562a-1 */
 115
 116  switch(configure->vcc){
 117  case 0:
 118    clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
 119    break;
 120
 121  case 33:  
 122    clear_cs3_bit(VCC_3V_EN|EN0);
 123    set_cs3_bit(VCC_5V_EN|EN1);
 124    break;
 125
 126  case 50:
 127    clear_cs3_bit(VCC_5V_EN|EN1);
 128    set_cs3_bit(VCC_3V_EN|EN0);
 129    break;
 130
 131  default:
 132    printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
 133           configure->vcc);
 134    clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
 135    restore_flags(flags);
 136    return -1;
 137  }
 138
 139  /* Silently ignore Vpp, output enable, speaker enable. */
 140
 141  restore_flags(flags);
 142
 143  return 0;
 144}
 145
 146static int simpad_pcmcia_socket_init(int sock)
 147{
 148  set_GPIO_IRQ_edge(GPIO_CF_CD, GPIO_BOTH_EDGES);
 149  return 0;
 150}
 151
 152static int simpad_pcmcia_socket_suspend(int sock)
 153{
 154  set_GPIO_IRQ_edge(GPIO_CF_CD, GPIO_NO_EDGES);
 155  return 0;
 156}
 157
 158struct pcmcia_low_level simpad_pcmcia_ops = { 
 159  init:                 simpad_pcmcia_init,
 160  shutdown:             simpad_pcmcia_shutdown,
 161  socket_state:         simpad_pcmcia_socket_state,
 162  get_irq_info:         simpad_pcmcia_get_irq_info,
 163  configure_socket:     simpad_pcmcia_configure_socket,
 164
 165  socket_init:          simpad_pcmcia_socket_init,
 166  socket_suspend:       simpad_pcmcia_socket_suspend,
 167};
 168
 169