drivers/pcmcia/sa1100_h3600.c

   1 /*
   2  * drivers/pcmcia/sa1100_h3600.c
   3  *
   4  * PCMCIA implementation routines for H3600
   5  *
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/device.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/init.h>
  12 #include <linux/delay.h>
  13
  14 #include <mach/hardware.h>
  15 #include <asm/irq.h>
  16 #include <asm/mach-types.h>
  17 #include <mach/h3600.h>
  18
  19 #include "sa1100_generic.h"
  20
  21 static struct pcmcia_irqs irqs[] = {
  22         { 0, IRQ_GPIO_H3600_PCMCIA_CD0, "PCMCIA CD0" },
  23         { 1, IRQ_GPIO_H3600_PCMCIA_CD1, "PCMCIA CD1" }
  24 };
  25
  26 static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  27 {
  28         skt->irq = skt->nr ? IRQ_GPIO_H3600_PCMCIA_IRQ1
  29                            : IRQ_GPIO_H3600_PCMCIA_IRQ0;
  30
  31
  32         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  33 }
  34
  35 static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  36 {
  37         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  38
  39         /* Disable CF bus: */
  40         clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  41         clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  42         set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  43 }
  44
  45 static void
  46 h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  47 {
  48         unsigned long levels = GPLR;
  49
  50         switch (skt->nr) {
  51         case 0:
  52                 state->detect = levels & GPIO_H3600_PCMCIA_CD0 ? 0 : 1;
  53                 state->ready = levels & GPIO_H3600_PCMCIA_IRQ0 ? 1 : 0;
  54                 state->bvd1 = 0;
  55                 state->bvd2 = 0;
  56                 state->wrprot = 0; /* Not available on H3600. */
  57                 state->vs_3v = 0;
  58                 state->vs_Xv = 0;
  59                 break;
  60
  61         case 1:
  62                 state->detect = levels & GPIO_H3600_PCMCIA_CD1 ? 0 : 1;
  63                 state->ready = levels & GPIO_H3600_PCMCIA_IRQ1 ? 1 : 0;
  64                 state->bvd1 = 0;
  65                 state->bvd2 = 0;
  66                 state->wrprot = 0; /* Not available on H3600. */
  67                 state->vs_3v = 0;
  68                 state->vs_Xv = 0;
  69                 break;
  70         }
  71 }
  72
  73 static int
  74 h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  75 {
  76         if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
  77                 printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
  78                        state->Vcc / 10, state->Vcc % 10);
  79                 return -1;
  80         }
  81
  82         if (state->flags & SS_RESET)
  83                 set_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  84         else
  85                 clr_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  86
  87         /* Silently ignore Vpp, output enable, speaker enable. */
  88
  89         return 0;
  90 }
  91
  92 static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  93 {
  94         /* Enable CF bus: */
  95         set_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  96         set_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  97         clr_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  98
  99         msleep(10);
 100
 101         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 102 }
 103
 104 static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 105 {
 106         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 107
 108         /*
 109          * FIXME:  This doesn't fit well.  We don't have the mechanism in
 110          * the generic PCMCIA layer to deal with the idea of two sockets
 111          * on one bus.  We rely on the cs.c behaviour shutting down
 112          * socket 0 then socket 1.
 113          */
 114         if (skt->nr == 1) {
 115                 clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
 116                 clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
 117                 /* hmm, does this suck power? */
 118                 set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
 119         }
 120 }
 121
 122 struct pcmcia_low_level h3600_pcmcia_ops = {
 123         .owner                  = THIS_MODULE,
 124         .hw_init                = h3600_pcmcia_hw_init,
 125         .hw_shutdown            = h3600_pcmcia_hw_shutdown,
 126         .socket_state           = h3600_pcmcia_socket_state,
 127         .configure_socket       = h3600_pcmcia_configure_socket,
 128
 129         .socket_init            = h3600_pcmcia_socket_init,
 130         .socket_suspend         = h3600_pcmcia_socket_suspend,
 131 };
 132
 133 int __init pcmcia_h3600_init(struct device *dev)
 134 {
 135         int ret = -ENODEV;
 136
 137         if (machine_is_h3600())
 138                 ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
 139
 140         return ret;
 141 }