drivers/pcmcia/sa1100_badge4.c

   1 /*
   2  * linux/drivers/pcmcia/sa1100_badge4.c
   3  *
   4  * BadgePAD 4 PCMCIA specific routines
   5  *
   6  *   Christopher Hoover <ch@hpl.hp.com>
   7  *
   8  * Copyright (C) 2002 Hewlett-Packard Company
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  */
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/sched.h>
  18 #include <linux/device.h>
  19 #include <linux/errno.h>
  20 #include <linux/init.h>
  21
  22 #include <asm/hardware.h>
  23 #include <asm/mach-types.h>
  24 #include <asm/arch/badge4.h>
  25 #include <asm/hardware/sa1111.h>
  26
  27 #include "sa1111_generic.h"
  28
  29 /*
  30  * BadgePAD 4 Details
  31  *
  32  * PCM Vcc:
  33  *
  34  *  PCM Vcc on BadgePAD 4 can be jumpered for 3v3 (short pins 1 and 3
  35  *  on JP6) or 5v0 (short pins 3 and 5 on JP6).
  36  *
  37  * PCM Vpp:
  38  *
  39  *  PCM Vpp on BadgePAD 4 can be jumpered for 12v0 (short pins 4 and 6
  40  *  on JP6) or tied to PCM Vcc (short pins 2 and 4 on JP6).  N.B.,
  41  *  12v0 operation requires that the power supply actually supply 12v0
  42  *  via pin 7 of JP7.
  43  *
  44  * CF Vcc:
  45  *
  46  *  CF Vcc on BadgePAD 4 can be jumpered either for 3v3 (short pins 1
  47  *  and 2 on JP10) or 5v0 (short pins 2 and 3 on JP10).
  48  *
  49  * Unfortunately there's no way programmatically to determine how a
  50  * given board is jumpered.  This code assumes a default jumpering
  51  * as described below.
  52  *
  53  * If the defaults aren't correct, you may override them with a pcmv
  54  * setup argument: pcmv=<pcm vcc>,<pcm vpp>,<cf vcc>.  The units are
  55  * tenths of volts; e.g. pcmv=33,120,50 indicates 3v3 PCM Vcc, 12v0
  56  * PCM Vpp, and 5v0 CF Vcc.
  57  *
  58  */
  59
  60 static int badge4_pcmvcc = 50;  /* pins 3 and 5 jumpered on JP6 */
  61 static int badge4_pcmvpp = 50;  /* pins 2 and 4 jumpered on JP6 */
  62 static int badge4_cfvcc = 33;   /* pins 1 and 2 jumpered on JP10 */
  63
  64 static void complain_about_jumpering(const char *whom,
  65                                      const char *supply,
  66                                      int given, int wanted)
  67 {
  68         printk(KERN_ERR
  69          "%s: %s %d.%dV wanted but board is jumpered for %s %d.%dV operation"
  70          "; re-jumper the board and/or use pcmv=xx,xx,xx\n",
  71                whom, supply,
  72                wanted / 10, wanted % 10,
  73                supply,
  74                given / 10, given % 10);
  75 }
  76
  77 static int
  78 badge4_pcmcia_configure_socket(struct sa1100_pcmcia_socket *skt, const socket_state_t *state)
  79 {
  80         int ret;
  81
  82         switch (skt->nr) {
  83         case 0:
  84                 if ((state->Vcc != 0) &&
  85                     (state->Vcc != badge4_pcmvcc)) {
  86                         complain_about_jumpering(__FUNCTION__, "pcmvcc",
  87                                                  badge4_pcmvcc, state->Vcc);
  88                         // Apply power regardless of the jumpering.
  89                         // return -1;
  90                 }
  91                 if ((state->Vpp != 0) &&
  92                     (state->Vpp != badge4_pcmvpp)) {
  93                         complain_about_jumpering(__FUNCTION__, "pcmvpp",
  94                                                  badge4_pcmvpp, state->Vpp);
  95                         return -1;
  96                 }
  97                 break;
  98
  99         case 1:
 100                 if ((state->Vcc != 0) &&
 101                     (state->Vcc != badge4_cfvcc)) {
 102                         complain_about_jumpering(__FUNCTION__, "cfvcc",
 103                                                  badge4_cfvcc, state->Vcc);
 104                         return -1;
 105                 }
 106                 break;
 107
 108         default:
 109                 return -1;
 110         }
 111
 112         ret = sa1111_pcmcia_configure_socket(skt, state);
 113         if (ret == 0) {
 114                 unsigned long flags;
 115                 int need5V;
 116
 117                 local_irq_save(flags);
 118
 119                 need5V = ((state->Vcc == 50) || (state->Vpp == 50));
 120
 121                 badge4_set_5V(BADGE4_5V_PCMCIA_SOCK(skt->nr), need5V);
 122
 123                 local_irq_restore(flags);
 124         }
 125
 126         return 0;
 127 }
 128
 129 static struct pcmcia_low_level badge4_pcmcia_ops = {
 130         .owner                  = THIS_MODULE,
 131         .init                   = sa1111_pcmcia_hw_init,
 132         .shutdown               = sa1111_pcmcia_hw_shutdown,
 133         .socket_state           = sa1111_pcmcia_socket_state,
 134         .configure_socket       = badge4_pcmcia_configure_socket,
 135
 136         .socket_init            = sa1111_pcmcia_socket_init,
 137         .socket_suspend         = sa1111_pcmcia_socket_suspend,
 138 };
 139
 140 int pcmcia_badge4_init(struct device *dev)
 141 {
 142         int ret = -ENODEV;
 143
 144         if (machine_is_badge4()) {
 145                 printk(KERN_INFO
 146                        "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n",
 147                        __FUNCTION__,
 148                        badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc);
 149
 150                 ret = sa11xx_drv_pcmcia_probe(dev, &badge4_pcmcia_ops, 0, 2);
 151         }
 152
 153         return ret;
 154 }
 155
 156 static int __init pcmv_setup(char *s)
 157 {
 158         int v[4];
 159
 160         s = get_options(s, ARRAY_SIZE(v), v);
 161
 162         if (v[0] >= 1) badge4_pcmvcc = v[1];
 163         if (v[0] >= 2) badge4_pcmvpp = v[2];
 164         if (v[0] >= 3) badge4_cfvcc = v[3];
 165
 166         return 1;
 167 }
 168
 169 __setup("pcmv=", pcmv_setup);