LXR linux/drivers/pcmcia/sa1111

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/drivers/pcmcia/sa1100_badge4.c
   4 *
   5 * BadgePAD 4 PCMCIA specific routines
   6 *
   7 *   Christopher Hoover <ch@hpl.hp.com>
   8 *
   9 * Copyright (C) 2002 Hewlett-Packard Company
  10 */
  11#include <linux/module.h>
  12#include <linux/kernel.h>
  13#include <linux/device.h>
  14#include <linux/errno.h>
  15#include <linux/init.h>
  16
  17#include <mach/hardware.h>
  18#include <asm/mach-types.h>
  19#include <mach/badge4.h>
  20#include <asm/hardware/sa1111.h>
  21
  22#include "sa1111_generic.h"
  23
  24/*
  25 * BadgePAD 4 Details
  26 *
  27 * PCM Vcc:
  28 *
  29 *  PCM Vcc on BadgePAD 4 can be jumpered for 3v3 (short pins 1 and 3
  30 *  on JP6) or 5v0 (short pins 3 and 5 on JP6).
  31 *
  32 * PCM Vpp:
  33 *
  34 *  PCM Vpp on BadgePAD 4 can be jumpered for 12v0 (short pins 4 and 6
  35 *  on JP6) or tied to PCM Vcc (short pins 2 and 4 on JP6).  N.B.,
  36 *  12v0 operation requires that the power supply actually supply 12v0
  37 *  via pin 7 of JP7.
  38 *
  39 * CF Vcc:
  40 *
  41 *  CF Vcc on BadgePAD 4 can be jumpered either for 3v3 (short pins 1
  42 *  and 2 on JP10) or 5v0 (short pins 2 and 3 on JP10).
  43 *
  44 * Unfortunately there's no way programmatically to determine how a
  45 * given board is jumpered.  This code assumes a default jumpering
  46 * as described below.
  47 *
  48 * If the defaults aren't correct, you may override them with a pcmv
  49 * setup argument: pcmv=<pcm vcc>,<pcm vpp>,<cf vcc>.  The units are
  50 * tenths of volts; e.g. pcmv=33,120,50 indicates 3v3 PCM Vcc, 12v0
  51 * PCM Vpp, and 5v0 CF Vcc.
  52 *
  53 */
  54
  55static int badge4_pcmvcc = 50;  /* pins 3 and 5 jumpered on JP6 */
  56static int badge4_pcmvpp = 50;  /* pins 2 and 4 jumpered on JP6 */
  57static int badge4_cfvcc = 33;   /* pins 1 and 2 jumpered on JP10 */
  58
  59static void complain_about_jumpering(const char *whom,
  60                                     const char *supply,
  61                                     int given, int wanted)
  62{
  63        printk(KERN_ERR
  64         "%s: %s %d.%dV wanted but board is jumpered for %s %d.%dV operation"
  65         "; re-jumper the board and/or use pcmv=xx,xx,xx\n",
  66               whom, supply,
  67               wanted / 10, wanted % 10,
  68               supply,
  69               given / 10, given % 10);
  70}
  71
  72static int
  73badge4_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  74{
  75        int ret;
  76
  77        switch (skt->nr) {
  78        case 0:
  79                if ((state->Vcc != 0) &&
  80                    (state->Vcc != badge4_pcmvcc)) {
  81                        complain_about_jumpering(__func__, "pcmvcc",
  82                                                 badge4_pcmvcc, state->Vcc);
  83                        // Apply power regardless of the jumpering.
  84                        // return -1;
  85                }
  86                if ((state->Vpp != 0) &&
  87                    (state->Vpp != badge4_pcmvpp)) {
  88                        complain_about_jumpering(__func__, "pcmvpp",
  89                                                 badge4_pcmvpp, state->Vpp);
  90                        return -1;
  91                }
  92                break;
  93
  94        case 1:
  95                if ((state->Vcc != 0) &&
  96                    (state->Vcc != badge4_cfvcc)) {
  97                        complain_about_jumpering(__func__, "cfvcc",
  98                                                 badge4_cfvcc, state->Vcc);
  99                        return -1;
 100                }
 101                break;
 102
 103        default:
 104                return -1;
 105        }
 106
 107        ret = sa1111_pcmcia_configure_socket(skt, state);
 108        if (ret == 0) {
 109                unsigned long flags;
 110                int need5V;
 111
 112                local_irq_save(flags);
 113
 114                need5V = ((state->Vcc == 50) || (state->Vpp == 50));
 115
 116                badge4_set_5V(BADGE4_5V_PCMCIA_SOCK(skt->nr), need5V);
 117
 118                local_irq_restore(flags);
 119        }
 120
 121        return ret;
 122}
 123
 124static struct pcmcia_low_level badge4_pcmcia_ops = {
 125        .owner                  = THIS_MODULE,
 126        .configure_socket       = badge4_pcmcia_configure_socket,
 127        .first                  = 0,
 128        .nr                     = 2,
 129};
 130
 131int pcmcia_badge4_init(struct sa1111_dev *dev)
 132{
 133        printk(KERN_INFO
 134               "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n",
 135               __func__,
 136               badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc);
 137
 138        sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops);
 139        return sa1111_pcmcia_add(dev, &badge4_pcmcia_ops,
 140                                 sa11xx_drv_pcmcia_add_one);
 141}
 142
 143#ifndef MODULE
 144static int __init pcmv_setup(char *s)
 145{
 146        int v[4];
 147
 148        s = get_options(s, ARRAY_SIZE(v), v);
 149
 150        if (v[0] >= 1) badge4_pcmvcc = v[1];
 151        if (v[0] >= 2) badge4_pcmvpp = v[2];
 152        if (v[0] >= 3) badge4_cfvcc = v[3];
 153
 154        return 1;
 155}
 156
 157__setup("pcmv=", pcmv_setup);
 158#endif
 159