drivers/pcmcia/sa1100_simpad.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * drivers/pcmcia/sa1100_simpad.c
   4  *
   5  * PCMCIA implementation routines for simpad
   6  *
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/device.h>
  11 #include <linux/init.h>
  12
  13 #include <mach/hardware.h>
  14 #include <asm/mach-types.h>
  15 #include <asm/irq.h>
  16 #include <mach/simpad.h>
  17 #include "sa1100_generic.h"
  18
  19 static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  20 {
  21
  22         simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  23
  24         skt->stat[SOC_STAT_CD].gpio = GPIO_CF_CD;
  25         skt->stat[SOC_STAT_CD].name = "CF_CD";
  26         skt->stat[SOC_STAT_RDY].gpio = GPIO_CF_IRQ;
  27         skt->stat[SOC_STAT_RDY].name = "CF_RDY";
  28
  29         return 0;
  30 }
  31
  32 static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  33 {
  34         /* Disable CF bus: */
  35         /*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
  36         simpad_clear_cs3_bit(PCMCIA_RESET);
  37 }
  38
  39 static void
  40 simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  41                            struct pcmcia_state *state)
  42 {
  43         long cs3reg = simpad_get_cs3_ro();
  44
  45         /* the detect signal is inverted - fix that up here */
  46         state->detect = !state->detect;
  47
  48         state->bvd1 = 1; /* Might be cs3reg & PCMCIA_BVD1 */
  49         state->bvd2 = 1; /* Might be cs3reg & PCMCIA_BVD2 */
  50
  51         if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
  52                         (PCMCIA_VS1|PCMCIA_VS2)) {
  53                 state->vs_3v=0;
  54                 state->vs_Xv=0;
  55         } else {
  56                 state->vs_3v=1;
  57                 state->vs_Xv=0;
  58         }
  59 }
  60
  61 static int
  62 simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  63                                const socket_state_t *state)
  64 {
  65         unsigned long flags;
  66
  67         local_irq_save(flags);
  68
  69         /* Murphy: see table of MIC2562a-1 */
  70         switch (state->Vcc) {
  71         case 0:
  72                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  73                 break;
  74
  75         case 33:
  76                 simpad_clear_cs3_bit(VCC_3V_EN|EN1);
  77                 simpad_set_cs3_bit(VCC_5V_EN|EN0);
  78                 break;
  79
  80         case 50:
  81                 simpad_clear_cs3_bit(VCC_5V_EN|EN1);
  82                 simpad_set_cs3_bit(VCC_3V_EN|EN0);
  83                 break;
  84
  85         default:
  86                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  87                         __func__, state->Vcc);
  88                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  89                 local_irq_restore(flags);
  90                 return -1;
  91         }
  92
  93
  94         local_irq_restore(flags);
  95
  96         return 0;
  97 }
  98
  99 static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 100 {
 101         simpad_set_cs3_bit(PCMCIA_RESET);
 102 }
 103
 104 static struct pcmcia_low_level simpad_pcmcia_ops = {
 105         .owner                  = THIS_MODULE,
 106         .hw_init                = simpad_pcmcia_hw_init,
 107         .hw_shutdown            = simpad_pcmcia_hw_shutdown,
 108         .socket_state           = simpad_pcmcia_socket_state,
 109         .configure_socket       = simpad_pcmcia_configure_socket,
 110         .socket_suspend         = simpad_pcmcia_socket_suspend,
 111 };
 112
 113 int pcmcia_simpad_init(struct device *dev)
 114 {
 115         int ret = -ENODEV;
 116
 117         if (machine_is_simpad())
 118                 ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
 119
 120         return ret;
 121 }