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 <mach/simpad.h>
  16 #include "sa1100_generic.h"
  17
  18 static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  19 {
  20
  21         simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  22
  23         skt->stat[SOC_STAT_CD].name = "cf-detect";
  24         skt->stat[SOC_STAT_RDY].name = "cf-ready";
  25
  26         return soc_pcmcia_request_gpiods(skt);
  27 }
  28
  29 static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  30 {
  31         /* Disable CF bus: */
  32         /*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
  33         simpad_clear_cs3_bit(PCMCIA_RESET);
  34 }
  35
  36 static void
  37 simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  38                            struct pcmcia_state *state)
  39 {
  40         long cs3reg = simpad_get_cs3_ro();
  41
  42         /* bvd1 might be cs3reg & PCMCIA_BVD1 */
  43         /* bvd2 might be cs3reg & PCMCIA_BVD2 */
  44
  45         if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
  46                         (PCMCIA_VS1|PCMCIA_VS2)) {
  47                 state->vs_3v=0;
  48                 state->vs_Xv=0;
  49         } else {
  50                 state->vs_3v=1;
  51                 state->vs_Xv=0;
  52         }
  53 }
  54
  55 static int
  56 simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  57                                const socket_state_t *state)
  58 {
  59         unsigned long flags;
  60
  61         local_irq_save(flags);
  62
  63         /* Murphy: see table of MIC2562a-1 */
  64         switch (state->Vcc) {
  65         case 0:
  66                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  67                 break;
  68
  69         case 33:
  70                 simpad_clear_cs3_bit(VCC_3V_EN|EN1);
  71                 simpad_set_cs3_bit(VCC_5V_EN|EN0);
  72                 break;
  73
  74         case 50:
  75                 simpad_clear_cs3_bit(VCC_5V_EN|EN1);
  76                 simpad_set_cs3_bit(VCC_3V_EN|EN0);
  77                 break;
  78
  79         default:
  80                 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  81                         __func__, state->Vcc);
  82                 simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  83                 local_irq_restore(flags);
  84                 return -1;
  85         }
  86
  87
  88         local_irq_restore(flags);
  89
  90         return 0;
  91 }
  92
  93 static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  94 {
  95         simpad_set_cs3_bit(PCMCIA_RESET);
  96 }
  97
  98 static struct pcmcia_low_level simpad_pcmcia_ops = {
  99         .owner                  = THIS_MODULE,
 100         .hw_init                = simpad_pcmcia_hw_init,
 101         .hw_shutdown            = simpad_pcmcia_hw_shutdown,
 102         .socket_state           = simpad_pcmcia_socket_state,
 103         .configure_socket       = simpad_pcmcia_configure_socket,
 104         .socket_suspend         = simpad_pcmcia_socket_suspend,
 105 };
 106
 107 int pcmcia_simpad_init(struct device *dev)
 108 {
 109         int ret = -ENODEV;
 110
 111         if (machine_is_simpad())
 112                 ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
 113
 114         return ret;
 115 }