drivers/pcmcia/sa1100_simpad.c

   1 /*
   2  * drivers/pcmcia/sa1100_simpad.c
   3  *
   4  * PCMCIA implementation routines for simpad
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/device.h>
  10 #include <linux/init.h>
  11
  12 #include <mach/hardware.h>
  13 #include <asm/mach-types.h>
  14 #include <asm/irq.h>
  15 #include <mach/simpad.h>
  16 #include "sa1100_generic.h"
  17
  18 static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  19 {
  20
  21         simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  22
  23         skt->stat[SOC_STAT_CD].gpio = GPIO_CF_CD;
  24         skt->stat[SOC_STAT_CD].name = "CF_CD";
  25         skt->stat[SOC_STAT_RDY].gpio = GPIO_CF_IRQ;
  26         skt->stat[SOC_STAT_RDY].name = "CF_RDY";
  27
  28         return 0;
  29 }
  30
  31 static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  32 {
  33         /* Disable CF bus: */
  34         /*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
  35         simpad_clear_cs3_bit(PCMCIA_RESET);
  36 }
  37
  38 static void
  39 simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  40                            struct pcmcia_state *state)
  41 {
  42         long cs3reg = simpad_get_cs3_ro();
  43
  44         /* the detect signal is inverted - fix that up here */
  45         state->detect = !state->detect;
  46
  47         state->bvd1 = 1; /* Might be cs3reg & PCMCIA_BVD1 */
  48         state->bvd2 = 1; /* Might be cs3reg & PCMCIA_BVD2 */
  49
  50         if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
  51                         (PCMCIA_VS1|PCMCIA_VS2)) {
  52                 state->vs_3v=0;
  53                 state->vs_Xv=0;
  54         } else {
  55                 state->vs_3v=1;
  56                 state->vs_Xv=0;
  57         }
  58 }
  59
  60 static int
  61 simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  62                                const socket_state_t *state)
  63 {
  64         unsigned long flags;
  65
  66         local_irq_save(flags);
  67
  68         /* Murphy: see table of MIC2562a-1 */
  69         switch (state->Vcc) {
  70         case 0:
  71                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  72                 break;
  73
  74         case 33:
  75                 simpad_clear_cs3_bit(VCC_3V_EN|EN1);
  76                 simpad_set_cs3_bit(VCC_5V_EN|EN0);
  77                 break;
  78
  79         case 50:
  80                 simpad_clear_cs3_bit(VCC_5V_EN|EN1);
  81                 simpad_set_cs3_bit(VCC_3V_EN|EN0);
  82                 break;
  83
  84         default:
  85                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  86                         __func__, state->Vcc);
  87                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  88                 local_irq_restore(flags);
  89                 return -1;
  90         }
  91
  92
  93         local_irq_restore(flags);
  94
  95         return 0;
  96 }
  97
  98 static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  99 {
 100         simpad_set_cs3_bit(PCMCIA_RESET);
 101 }
 102
 103 static struct pcmcia_low_level simpad_pcmcia_ops = {
 104         .owner                  = THIS_MODULE,
 105         .hw_init                = simpad_pcmcia_hw_init,
 106         .hw_shutdown            = simpad_pcmcia_hw_shutdown,
 107         .socket_state           = simpad_pcmcia_socket_state,
 108         .configure_socket       = simpad_pcmcia_configure_socket,
 109         .socket_suspend         = simpad_pcmcia_socket_suspend,
 110 };
 111
 112 int __devinit pcmcia_simpad_init(struct device *dev)
 113 {
 114         int ret = -ENODEV;
 115
 116         if (machine_is_simpad())
 117                 ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
 118
 119         return ret;
 120 }