Root/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/device.h>
18#include <linux/errno.h>
19#include <linux/init.h>
20
21#include <mach/hardware.h>
22#include <asm/mach-types.h>
23#include <mach/badge4.h>
24#include <asm/hardware/sa1111.h>
25
26#include "sa1111_generic.h"
27
28/*
29 * BadgePAD 4 Details
30 *
31 * PCM Vcc:
32 *
33 * PCM Vcc on BadgePAD 4 can be jumpered for 3v3 (short pins 1 and 3
34 * on JP6) or 5v0 (short pins 3 and 5 on JP6).
35 *
36 * PCM Vpp:
37 *
38 * PCM Vpp on BadgePAD 4 can be jumpered for 12v0 (short pins 4 and 6
39 * on JP6) or tied to PCM Vcc (short pins 2 and 4 on JP6). N.B.,
40 * 12v0 operation requires that the power supply actually supply 12v0
41 * via pin 7 of JP7.
42 *
43 * CF Vcc:
44 *
45 * CF Vcc on BadgePAD 4 can be jumpered either for 3v3 (short pins 1
46 * and 2 on JP10) or 5v0 (short pins 2 and 3 on JP10).
47 *
48 * Unfortunately there's no way programmatically to determine how a
49 * given board is jumpered. This code assumes a default jumpering
50 * as described below.
51 *
52 * If the defaults aren't correct, you may override them with a pcmv
53 * setup argument: pcmv=<pcm vcc>,<pcm vpp>,<cf vcc>. The units are
54 * tenths of volts; e.g. pcmv=33,120,50 indicates 3v3 PCM Vcc, 12v0
55 * PCM Vpp, and 5v0 CF Vcc.
56 *
57 */
58
59static int badge4_pcmvcc = 50; /* pins 3 and 5 jumpered on JP6 */
60static int badge4_pcmvpp = 50; /* pins 2 and 4 jumpered on JP6 */
61static int badge4_cfvcc = 33; /* pins 1 and 2 jumpered on JP10 */
62
63static void complain_about_jumpering(const char *whom,
64                     const char *supply,
65                     int given, int wanted)
66{
67    printk(KERN_ERR
68     "%s: %s %d.%dV wanted but board is jumpered for %s %d.%dV operation"
69     "; re-jumper the board and/or use pcmv=xx,xx,xx\n",
70           whom, supply,
71           wanted / 10, wanted % 10,
72           supply,
73           given / 10, given % 10);
74}
75
76static int
77badge4_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
78{
79    int ret;
80
81    switch (skt->nr) {
82    case 0:
83        if ((state->Vcc != 0) &&
84            (state->Vcc != badge4_pcmvcc)) {
85            complain_about_jumpering(__func__, "pcmvcc",
86                         badge4_pcmvcc, state->Vcc);
87            // Apply power regardless of the jumpering.
88            // return -1;
89        }
90        if ((state->Vpp != 0) &&
91            (state->Vpp != badge4_pcmvpp)) {
92            complain_about_jumpering(__func__, "pcmvpp",
93                         badge4_pcmvpp, state->Vpp);
94            return -1;
95        }
96        break;
97
98    case 1:
99        if ((state->Vcc != 0) &&
100            (state->Vcc != badge4_cfvcc)) {
101            complain_about_jumpering(__func__, "cfvcc",
102                         badge4_cfvcc, state->Vcc);
103            return -1;
104        }
105        break;
106
107    default:
108        return -1;
109    }
110
111    ret = sa1111_pcmcia_configure_socket(skt, state);
112    if (ret == 0) {
113        unsigned long flags;
114        int need5V;
115
116        local_irq_save(flags);
117
118        need5V = ((state->Vcc == 50) || (state->Vpp == 50));
119
120        badge4_set_5V(BADGE4_5V_PCMCIA_SOCK(skt->nr), need5V);
121
122        local_irq_restore(flags);
123    }
124
125    return 0;
126}
127
128static struct pcmcia_low_level badge4_pcmcia_ops = {
129    .owner = THIS_MODULE,
130    .configure_socket = badge4_pcmcia_configure_socket,
131    .socket_init = sa1111_pcmcia_socket_init,
132    .first = 0,
133    .nr = 2,
134};
135
136int pcmcia_badge4_init(struct device *dev)
137{
138    int ret = -ENODEV;
139
140    if (machine_is_badge4()) {
141        printk(KERN_INFO
142               "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n",
143               __func__,
144               badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc);
145
146        sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops);
147        ret = sa1111_pcmcia_add(dev, &badge4_pcmcia_ops,
148                sa11xx_drv_pcmcia_add_one);
149    }
150
151    return ret;
152}
153
154static int __init pcmv_setup(char *s)
155{
156    int v[4];
157
158    s = get_options(s, ARRAY_SIZE(v), v);
159
160    if (v[0] >= 1) badge4_pcmvcc = v[1];
161    if (v[0] >= 2) badge4_pcmvpp = v[2];
162    if (v[0] >= 3) badge4_cfvcc = v[3];
163
164    return 1;
165}
166
167__setup("pcmv=", pcmv_setup);
168

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