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
59 static int badge4_pcmvcc = 50; /* pins 3 and 5 jumpered on JP6 */
60 static int badge4_pcmvpp = 50; /* pins 2 and 4 jumpered on JP6 */
61 static int badge4_cfvcc = 33; /* pins 1 and 2 jumpered on JP10 */
62
complain_about_jumpering(const char * whom,const char * supply,int given,int wanted)63 static 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
76 static int
badge4_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)77 badge4_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 ret;
126 }
127
128 static struct pcmcia_low_level badge4_pcmcia_ops = {
129 .owner = THIS_MODULE,
130 .configure_socket = badge4_pcmcia_configure_socket,
131 .first = 0,
132 .nr = 2,
133 };
134
pcmcia_badge4_init(struct sa1111_dev * dev)135 int pcmcia_badge4_init(struct sa1111_dev *dev)
136 {
137 printk(KERN_INFO
138 "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n",
139 __func__,
140 badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc);
141
142 sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops);
143 return sa1111_pcmcia_add(dev, &badge4_pcmcia_ops,
144 sa11xx_drv_pcmcia_add_one);
145 }
146
147 #ifndef MODULE
pcmv_setup(char * s)148 static int __init pcmv_setup(char *s)
149 {
150 int v[4];
151
152 s = get_options(s, ARRAY_SIZE(v), v);
153
154 if (v[0] >= 1) badge4_pcmvcc = v[1];
155 if (v[0] >= 2) badge4_pcmvpp = v[2];
156 if (v[0] >= 3) badge4_cfvcc = v[3];
157
158 return 1;
159 }
160
161 __setup("pcmv=", pcmv_setup);
162 #endif
163
