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/sched.h>
  10 #include <linux/device.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14
  15 #include <asm/hardware.h>
  16 #include <asm/irq.h>
  17 #include <asm/mach-types.h>
  18 #include <asm/arch/h3600.h>
  19
  20 #include "sa1100_generic.h"
  21
  22 static struct pcmcia_irqs irqs[] = {
  23         { 0, IRQ_GPIO_H3600_PCMCIA_CD0, "PCMCIA CD0" },
  24         { 1, IRQ_GPIO_H3600_PCMCIA_CD1, "PCMCIA CD1" }
  25 };
  26
  27 static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  28 {
  29         skt->irq = skt->nr ? IRQ_GPIO_H3600_PCMCIA_IRQ1
  30                            : IRQ_GPIO_H3600_PCMCIA_IRQ0;
  31
  32
  33         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  34 }
  35
  36 static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  37 {
  38         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  39
  40         /* Disable CF bus: */
  41         clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  42         clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  43         set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  44 }
  45
  46 static void
  47 h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  48 {
  49         unsigned long levels = GPLR;
  50
  51         switch (skt->nr) {
  52         case 0:
  53                 state->detect = levels & GPIO_H3600_PCMCIA_CD0 ? 0 : 1;
  54                 state->ready = levels & GPIO_H3600_PCMCIA_IRQ0 ? 1 : 0;
  55                 state->bvd1 = 0;
  56                 state->bvd2 = 0;
  57                 state->wrprot = 0; /* Not available on H3600. */
  58                 state->vs_3v = 0;
  59                 state->vs_Xv = 0;
  60                 break;
  61
  62         case 1:
  63                 state->detect = levels & GPIO_H3600_PCMCIA_CD1 ? 0 : 1;
  64                 state->ready = levels & GPIO_H3600_PCMCIA_IRQ1 ? 1 : 0;
  65                 state->bvd1 = 0;
  66                 state->bvd2 = 0;
  67                 state->wrprot = 0; /* Not available on H3600. */
  68                 state->vs_3v = 0;
  69                 state->vs_Xv = 0;
  70                 break;
  71         }
  72 }
  73
  74 static int
  75 h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  76 {
  77         if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
  78                 printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
  79                        state->Vcc / 10, state->Vcc % 10);
  80                 return -1;
  81         }
  82
  83         if (state->flags & SS_RESET)
  84                 set_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  85         else
  86                 clr_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  87
  88         /* Silently ignore Vpp, output enable, speaker enable. */
  89
  90         return 0;
  91 }
  92
  93 static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  94 {
  95         /* Enable CF bus: */
  96         set_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  97         set_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  98         clr_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  99
 100         msleep(10);
 101
 102         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 103 }
 104
 105 static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 106 {
 107         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 108
 109         /*
 110          * FIXME:  This doesn't fit well.  We don't have the mechanism in
 111          * the generic PCMCIA layer to deal with the idea of two sockets
 112          * on one bus.  We rely on the cs.c behaviour shutting down
 113          * socket 0 then socket 1.
 114          */
 115         if (skt->nr == 1) {
 116                 clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
 117                 clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
 118                 /* hmm, does this suck power? */
 119                 set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
 120         }
 121 }
 122
 123 struct pcmcia_low_level h3600_pcmcia_ops = {
 124         .owner                  = THIS_MODULE,
 125         .hw_init                = h3600_pcmcia_hw_init,
 126         .hw_shutdown            = h3600_pcmcia_hw_shutdown,
 127         .socket_state           = h3600_pcmcia_socket_state,
 128         .configure_socket       = h3600_pcmcia_configure_socket,
 129
 130         .socket_init            = h3600_pcmcia_socket_init,
 131         .socket_suspend         = h3600_pcmcia_socket_suspend,
 132 };
 133
 134 int __init pcmcia_h3600_init(struct device *dev)
 135 {
 136         int ret = -ENODEV;
 137
 138         if (machine_is_h3600())
 139                 ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
 140
 141         return ret;
 142 }