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 struct pcmcia_irqs irqs[] = {
  19         { 1, IRQ_GPIO_CF_CD, "CF_CD" },
  20 };
  21
  22 static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  23 {
  24
  25         simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  26
  27         skt->socket.pci_irq = IRQ_GPIO_CF_IRQ;
  28
  29         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  30 }
  31
  32 static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  33 {
  34         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  35
  36         /* Disable CF bus: */
  37         /*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
  38         simpad_clear_cs3_bit(PCMCIA_RESET);
  39 }
  40
  41 static void
  42 simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  43                            struct pcmcia_state *state)
  44 {
  45         unsigned long levels = GPLR;
  46         long cs3reg = simpad_get_cs3_ro();
  47
  48         state->detect=((levels & GPIO_CF_CD)==0)?1:0;
  49         state->ready=(levels & GPIO_CF_IRQ)?1:0;
  50         state->bvd1 = 1; /* Might be cs3reg & PCMCIA_BVD1 */
  51         state->bvd2 = 1; /* Might be cs3reg & PCMCIA_BVD2 */
  52         state->wrprot=0; /* Not available on Simpad. */
  53
  54         if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
  55                         (PCMCIA_VS1|PCMCIA_VS2)) {
  56                 state->vs_3v=0;
  57                 state->vs_Xv=0;
  58         } else {
  59                 state->vs_3v=1;
  60                 state->vs_Xv=0;
  61         }
  62 }
  63
  64 static int
  65 simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  66                                const socket_state_t *state)
  67 {
  68         unsigned long flags;
  69
  70         local_irq_save(flags);
  71
  72         /* Murphy: see table of MIC2562a-1 */
  73         switch (state->Vcc) {
  74         case 0:
  75                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  76                 break;
  77
  78         case 33:
  79                 simpad_clear_cs3_bit(VCC_3V_EN|EN1);
  80                 simpad_set_cs3_bit(VCC_5V_EN|EN0);
  81                 break;
  82
  83         case 50:
  84                 simpad_clear_cs3_bit(VCC_5V_EN|EN1);
  85                 simpad_set_cs3_bit(VCC_3V_EN|EN0);
  86                 break;
  87
  88         default:
  89                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  90                         __func__, state->Vcc);
  91                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  92                 local_irq_restore(flags);
  93                 return -1;
  94         }
  95
  96
  97         local_irq_restore(flags);
  98
  99         return 0;
 100 }
 101
 102 static void simpad_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 103 {
 104         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 105 }
 106
 107 static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 108 {
 109         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 110         simpad_set_cs3_bit(PCMCIA_RESET);
 111 }
 112
 113 static struct pcmcia_low_level simpad_pcmcia_ops = {
 114         .owner                  = THIS_MODULE,
 115         .hw_init                = simpad_pcmcia_hw_init,
 116         .hw_shutdown            = simpad_pcmcia_hw_shutdown,
 117         .socket_state           = simpad_pcmcia_socket_state,
 118         .configure_socket       = simpad_pcmcia_configure_socket,
 119         .socket_init            = simpad_pcmcia_socket_init,
 120         .socket_suspend         = simpad_pcmcia_socket_suspend,
 121 };
 122
 123 int __devinit pcmcia_simpad_init(struct device *dev)
 124 {
 125         int ret = -ENODEV;
 126
 127         if (machine_is_simpad())
 128                 ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
 129
 130         return ret;
 131 }