drivers/pcmcia/sa1100_trizeps.c

   1 /*
   2  * drivers/pcmcia/sa1100_trizeps.c
   3  *
   4  * PCMCIA implementation routines for Trizeps
   5  *
   6  * Authors:
   7  * Andreas Hofer <ho@dsa-ac.de>,
   8  * Peter Lueg <pl@dsa-ac.de>,
   9  * Guennadi Liakhovetski <gl@dsa-ac.de>
  10  *
  11  */
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/device.h>
  16 #include <linux/init.h>
  17
  18 #include <asm/hardware.h>
  19 #include <asm/arch/trizeps.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/system.h>
  22 #include <asm/irq.h>
  23 #include "sa1100_generic.h"
  24
  25 #define NUMBER_OF_TRIZEPS_PCMCIA_SLOTS 1
  26
  27 static struct pcmcia_irqs irqs[] = {
  28         { 0, TRIZEPS_IRQ_PCMCIA_CD0, "PCMCIA_CD0" },
  29 };
  30
  31 /**
  32  *
  33  *
  34  ******************************************************/
  35 static int trizeps_pcmcia_init(struct sa1100_pcmcia_socket *skt)
  36 {
  37         skt->irq = TRIZEPS_IRQ_PCMCIA_IRQ0;
  38
  39         /* Enable CF bus: */
  40         TRIZEPS_BCR_clear(TRIZEPS_BCR1, TRIZEPS_nPCM_ENA_REG);
  41
  42         /* All those are inputs */
  43         GPDR &= ~((GPIO_GPIO(TRIZEPS_GPIO_PCMCIA_CD0))
  44                     | (GPIO_GPIO(TRIZEPS_GPIO_PCMCIA_IRQ0)));
  45
  46         return sa11xx_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  47 }
  48
  49 /**
  50  *
  51  *
  52  ******************************************************/
  53 static void trizeps_pcmcia_shutdown(struct sa1100_pcmcia_socket *skt)
  54 {
  55         printk(">>>>>PCMCIA TRIZEPS shutdown\n");
  56
  57         sa11xx_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  58
  59         /* Disable CF bus: */
  60         TRIZEPS_BCR_set(TRIZEPS_BCR1, TRIZEPS_nPCM_ENA_REG);
  61 }
  62
  63 /**
  64  *
  65  ******************************************************/
  66 static void
  67 trizeps_pcmcia_socket_state(struct sa1100_pcmcia_socket *skt,
  68                             struct pcmcia_state *state_array)
  69 {
  70         unsigned long levels = GPLR;
  71
  72         state->detect = ((levels & GPIO_GPIO(TRIZEPS_GPIO_PCMCIA_CD0)) == 0) ? 1 : 0;
  73         state->ready  = ((levels & GPIO_GPIO(TRIZEPS_GPIO_PCMCIA_IRQ0)) != 0) ? 1 : 0;
  74         state->bvd1   = ((TRIZEPS_BCR1 & TRIZEPS_PCM_BVD1) !=0 ) ? 1 : 0;
  75         state->bvd2   = ((TRIZEPS_BCR1 & TRIZEPS_PCM_BVD2) != 0) ? 1 : 0;
  76         state->wrprot = 0; // not write protected
  77         state->vs_3v  = ((TRIZEPS_BCR1 & TRIZEPS_nPCM_VS1) == 0) ? 1 : 0; //VS1=0 -> vs_3v=1
  78         state->vs_Xv  = ((TRIZEPS_BCR1 & TRIZEPS_nPCM_VS2) == 0) ? 1 : 0; //VS2=0 -> vs_Xv=1
  79 }
  80
  81 /**
  82  *
  83  *
  84  ******************************************************/
  85 static int
  86 trizeps_pcmcia_configure_socket(struct sa1100_pcmcia_socket *skt,
  87                                 const socket_state_t *state)
  88 {
  89         unsigned long flags;
  90
  91         local_irq_save(flags);
  92
  93         switch (state->Vcc) {
  94         case 0:
  95                 printk(">>> PCMCIA Power off\n");
  96                 TRIZEPS_BCR_clear(TRIZEPS_BCR1, TRIZEPS_PCM_V3_EN_REG);
  97                 TRIZEPS_BCR_clear(TRIZEPS_BCR1, TRIZEPS_PCM_V5_EN_REG);
  98                 break;
  99
 100         case 33:
 101                 // 3.3V Power on
 102                 TRIZEPS_BCR_clear(TRIZEPS_BCR1, TRIZEPS_PCM_V3_EN_REG);
 103                 TRIZEPS_BCR_set(TRIZEPS_BCR1, TRIZEPS_PCM_V5_EN_REG);
 104                 break;
 105         case 50:
 106                 // 5.0V Power on
 107                 TRIZEPS_BCR_set(TRIZEPS_BCR1, TRIZEPS_PCM_V3_EN_REG);
 108                 TRIZEPS_BCR_clear(TRIZEPS_BCR1, TRIZEPS_PCM_V5_EN_REG);
 109                 break;
 110         default:
 111                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
 112                        state->Vcc);
 113                 local_irq_restore(flags);
 114                 return -1;
 115         }
 116
 117         if (state->flags & SS_RESET)
 118                 TRIZEPS_BCR_set(TRIZEPS_BCR1, TRIZEPS_nPCM_RESET_DISABLE);   // Reset
 119         else
 120                 TRIZEPS_BCR_clear(TRIZEPS_BCR1, TRIZEPS_nPCM_RESET_DISABLE); // no Reset
 121         /*
 122           printk(" vcc=%u vpp=%u -->reset=%i\n",
 123           state->Vcc,
 124           state->Vpp,
 125           ((BCR_read(1) & nPCM_RESET_DISABLE)? 1:0));
 126         */
 127         local_irq_restore(flags);
 128
 129         return 0;
 130 }
 131
 132 static void trizeps_pcmcia_socket_init(struct sa1100_pcmcia_socket *skt)
 133 {
 134         sa11xx_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 135 }
 136
 137 static void trizeps_pcmcia_socket_suspend(struct sa1100_pcmcia_socket *skt)
 138 {
 139         sa11xx_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 140 }
 141
 142 /**
 143  * low-level PCMCIA interface
 144  *
 145  ******************************************************/
 146 struct pcmcia_low_level trizeps_pcmcia_ops = {
 147         .owner                  = THIS_MODULE,
 148         .hw_init                = trizeps_pcmcia_hw_init,
 149         .hw_shutdown            = trizeps_pcmcia_hw_shutdown,
 150         .socket_state           = trizeps_pcmcia_socket_state,
 151         .configure_socket       = trizeps_pcmcia_configure_socket,
 152         .socket_init            = trizeps_pcmcia_socket_init,
 153         .socket_suspend         = trizeps_pcmcia_socket_suspend,
 154 };
 155
 156 int __init pcmcia_trizeps_init(struct device *dev)
 157 {
 158         int ret = -ENODEV;
 159
 160         if (machine_is_trizeps())
 161                 ret = sa11xx_drv_pcmcia_probe(dev, &trizeps_pcmcia_ops, 0,
 162                                               NUMBER_OF_TRIZEPS_PCMCIA_SLOTS);
 163
 164         return ret;
 165 }