release/src-rt-6.x.4708/linux/linux-2.6.36/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 extern long get_cs3_shadow(void);
  19 extern void set_cs3_bit(int value);
  20 extern void clear_cs3_bit(int value);
  21
  22 static struct pcmcia_irqs irqs[] = {
  23         { 1, IRQ_GPIO_CF_CD, "CF_CD" },
  24 };
  25
  26 static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  27 {
  28
  29         clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  30
  31         skt->socket.pci_irq = IRQ_GPIO_CF_IRQ;
  32
  33         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  34 }
  35
  36 static void simpad_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         //set_cs3_bit(PCMCIA_BUFF_DIS);
  42         clear_cs3_bit(PCMCIA_RESET);
  43 }
  44
  45 static void
  46 simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  47                            struct pcmcia_state *state)
  48 {
  49         unsigned long levels = GPLR;
  50         long cs3reg = get_cs3_shadow();
  51
  52         state->detect=((levels & GPIO_CF_CD)==0)?1:0;
  53         state->ready=(levels & GPIO_CF_IRQ)?1:0;
  54         state->bvd1=1; /* Not available on Simpad. */
  55         state->bvd2=1; /* Not available on Simpad. */
  56         state->wrprot=0; /* Not available on Simpad. */
  57
  58         if((cs3reg & 0x0c) == 0x0c) {
  59                 state->vs_3v=0;
  60                 state->vs_Xv=0;
  61         } else {
  62                 state->vs_3v=1;
  63                 state->vs_Xv=0;
  64         }
  65 }
  66
  67 static int
  68 simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  69                                const socket_state_t *state)
  70 {
  71         unsigned long flags;
  72
  73         local_irq_save(flags);
  74
  75         /* Murphy: see table of MIC2562a-1 */
  76         switch (state->Vcc) {
  77         case 0:
  78                 clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  79                 break;
  80
  81         case 33:
  82                 clear_cs3_bit(VCC_3V_EN|EN1);
  83                 set_cs3_bit(VCC_5V_EN|EN0);
  84                 break;
  85
  86         case 50:
  87                 clear_cs3_bit(VCC_5V_EN|EN1);
  88                 set_cs3_bit(VCC_3V_EN|EN0);
  89                 break;
  90
  91         default:
  92                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  93                         __func__, state->Vcc);
  94                 clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  95                 local_irq_restore(flags);
  96                 return -1;
  97         }
  98
  99
 100         local_irq_restore(flags);
 101
 102         return 0;
 103 }
 104
 105 static void simpad_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 106 {
 107         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 108 }
 109
 110 static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 111 {
 112         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 113         set_cs3_bit(PCMCIA_RESET);
 114 }
 115
 116 static struct pcmcia_low_level simpad_pcmcia_ops = {
 117         .owner                  = THIS_MODULE,
 118         .hw_init                = simpad_pcmcia_hw_init,
 119         .hw_shutdown            = simpad_pcmcia_hw_shutdown,
 120         .socket_state           = simpad_pcmcia_socket_state,
 121         .configure_socket       = simpad_pcmcia_configure_socket,
 122         .socket_init            = simpad_pcmcia_socket_init,
 123         .socket_suspend         = simpad_pcmcia_socket_suspend,
 124 };
 125
 126 int __init pcmcia_simpad_init(struct device *dev)
 127 {
 128         int ret = -ENODEV;
 129
 130         if (machine_is_simpad())
 131                 ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
 132
 133         return ret;
 134 }