drivers/pcmcia/sa1111_neponset.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * linux/drivers/pcmcia/sa1100_neponset.c
   4  *
   5  * Neponset PCMCIA specific routines
   6  */
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/device.h>
  10 #include <linux/errno.h>
  11 #include <linux/init.h>
  12
  13 #include <asm/mach-types.h>
  14
  15 #include "sa1111_generic.h"
  16 #include "max1600.h"
  17
  18 /*
  19  * Neponset uses the Maxim MAX1600, with the following connections:
  20  *
  21  *   MAX1600      Neponset
  22  *
  23  *    A0VCC        SA-1111 GPIO A<1>
  24  *    A1VCC        SA-1111 GPIO A<0>
  25  *    A0VPP        CPLD NCR A0VPP
  26  *    A1VPP        CPLD NCR A1VPP
  27  *    B0VCC        SA-1111 GPIO A<2>
  28  *    B1VCC        SA-1111 GPIO A<3>
  29  *    B0VPP        ground (slot B is CF)
  30  *    B1VPP        ground (slot B is CF)
  31  *
  32  *     VX          VCC (5V)
  33  *     VY          VCC3_3 (3.3V)
  34  *     12INA       12V
  35  *     12INB       ground (slot B is CF)
  36  *
  37  * The MAX1600 CODE pin is tied to ground, placing the device in
  38  * "Standard Intel code" mode. Refer to the Maxim data sheet for
  39  * the corresponding truth table.
  40  */
  41 static int neponset_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  42 {
  43         struct max1600 *m;
  44         int ret;
  45
  46         ret = max1600_init(skt->socket.dev.parent, &m,
  47                            skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
  48                            MAX1600_CODE_LOW);
  49         if (ret == 0)
  50                 skt->driver_data = m;
  51
  52         return ret;
  53 }
  54
  55 static int
  56 neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  57 {
  58         struct max1600 *m = skt->driver_data;
  59         int ret;
  60
  61         ret = sa1111_pcmcia_configure_socket(skt, state);
  62         if (ret == 0)
  63                 ret = max1600_configure(m, state->Vcc, state->Vpp);
  64
  65         return ret;
  66 }
  67
  68 static struct pcmcia_low_level neponset_pcmcia_ops = {
  69         .owner                  = THIS_MODULE,
  70         .hw_init                = neponset_pcmcia_hw_init,
  71         .configure_socket       = neponset_pcmcia_configure_socket,
  72         .first                  = 0,
  73         .nr                     = 2,
  74 };
  75
  76 int pcmcia_neponset_init(struct sa1111_dev *sadev)
  77 {
  78         sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops);
  79         return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops,
  80                                  sa11xx_drv_pcmcia_add_one);
  81 }