drivers/pcmcia/sa1100_graphicsclient.c

   1 /*
   2  * drivers/pcmcia/sa1100_graphicsclient.c
   3  *
   4  * PCMCIA implementation routines for Graphics Client Plus
   5  *
   6  * 9/12/01   Woojung
   7  *    Turn power OFF at startup
   8  * 1/31/2001 Woojung Huh
   9  *    Fix for GC Plus PCMCIA Reset Problem
  10  * 2/27/2001 Woojung Huh [whuh@applieddata.net]
  11  *    Fix
  12  *
  13  */
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/sched.h>
  17 #include <linux/delay.h>
  18 #include <linux/device.h>
  19 #include <linux/init.h>
  20
  21 #include <asm/hardware.h>
  22 #include <asm/mach-types.h>
  23 #include <asm/irq.h>
  24 #include "sa1100_generic.h"
  25
  26 #error This is broken!
  27
  28 #define S0_CD_IRQ               60                              // Socket 0 Card Detect IRQ
  29 #define S0_STS_IRQ              55                              // Socket 0 PCMCIA IRQ
  30
  31 static volatile unsigned long *PCMCIA_Status =
  32                 ((volatile unsigned long *) ADS_p2v(_ADS_CS_STATUS));
  33
  34 static volatile unsigned long *PCMCIA_Power =
  35                 ((volatile unsigned long *) ADS_p2v(_ADS_CS_PR));
  36
  37 static struct pcmcia_irqs irqs[] = {
  38         { 0, S0_CD_IRQ, "PCMCIA 0 CD" },
  39 };
  40
  41 static int gcplus_pcmcia_init(struct soc_pcmcia_socket *skt)
  42 {
  43         // Reset PCMCIA
  44         // Reset Timing for CPLD(U2) version 8001E or later
  45         *PCMCIA_Power &= ~ ADS_CS_PR_A_RESET;
  46         udelay(12);                     // 12 uSec
  47
  48         *PCMCIA_Power |= ADS_CS_PR_A_RESET;
  49         mdelay(30);                     // 30 mSec
  50
  51         // Turn off 5V
  52         *PCMCIA_Power &= ~0x03;
  53
  54         skt->irq = S0_STS_IRQ;
  55
  56         /* Register interrupts */
  57         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  58 }
  59
  60 static void gcplus_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  61 {
  62         /* disable IRQs */
  63         free_irq(S0_CD_IRQ, skt);
  64
  65         /* Shutdown PCMCIA power */
  66         mdelay(2);                      // 2msec
  67         *PCMCIA_Power &= ~0x03;
  68 }
  69
  70 static void
  71 gcplus_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  72 {
  73         unsigned long levels = *PCMCIA_Status;
  74
  75         state->detect=(levels & ADS_CS_ST_A_CD)?1:0;
  76         state->ready=(levels & ADS_CS_ST_A_READY)?1:0;
  77         state->bvd1= 0;
  78         state->bvd2= 0;
  79         state->wrprot=0;
  80         state->vs_3v=0;
  81         state->vs_Xv=0;
  82 }
  83
  84 static int
  85 gcplus_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  86                                const socket_state_t *state)
  87 {
  88         unsigned long flags;
  89
  90         local_irq_save(flags);
  91
  92         switch (state->Vcc) {
  93         case 0:
  94                 *PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
  95                 break;
  96
  97         case 50:
  98                 *PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
  99                 *PCMCIA_Power |= ADS_CS_PR_A_5V_POWER;
 100                 break;
 101
 102         case 33:
 103                 *PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
 104                 *PCMCIA_Power |= ADS_CS_PR_A_3V_POWER;
 105                 break;
 106
 107         default:
 108                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
 109                         __FUNCTION__, state->Vcc);
 110                 local_irq_restore(flags);
 111                 return -1;
 112         }
 113
 114         /* Silently ignore Vpp, output enable, speaker enable. */
 115
 116         // Reset PCMCIA
 117         *PCMCIA_Power &= ~ ADS_CS_PR_A_RESET;
 118         udelay(12);
 119
 120         *PCMCIA_Power |= ADS_CS_PR_A_RESET;
 121         mdelay(30);
 122
 123         local_irq_restore(flags);
 124
 125         return 0;
 126 }
 127
 128 static void gcplus_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 129 {
 130 }
 131
 132 static void gcplus_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 133 {
 134 }
 135
 136 static struct pcmcia_low_level gcplus_pcmcia_ops = {
 137         .owner                  = THIS_MODULE,
 138         .hw_init                = gcplus_pcmcia_hw_init,
 139         .hw_shutdown            = gcplus_pcmcia_hw_shutdown,
 140         .socket_state           = gcplus_pcmcia_socket_state,
 141         .configure_socket       = gcplus_pcmcia_configure_socket,
 142         .socket_init            = gcplus_pcmcia_socket_init,
 143         .socket_suspend         = gcplus_pcmcia_socket_suspend,
 144 };
 145
 146 int __init pcmcia_gcplus_init(struct device *dev)
 147 {
 148         int ret = -ENODEV;
 149
 150         if (machine_is_gcplus())
 151                 ret = sa11xx_drv_pcmcia_probe(dev, &gcplus_pcmcia_ops, 0, 1);
 152
 153         return ret;
 154 }