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1da177e4 LT |
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> | |
1da177e4 LT |
17 | #include <linux/device.h> |
18 | #include <linux/errno.h> | |
19 | #include <linux/init.h> | |
20 | ||
21 | #include <asm/hardware.h> | |
22 | #include <asm/mach-types.h> | |
23 | #include <asm/arch/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 | ||
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 | |
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(__FUNCTION__, "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(__FUNCTION__, "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(__FUNCTION__, "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 | ||
128 | static struct pcmcia_low_level badge4_pcmcia_ops = { | |
129 | .owner = THIS_MODULE, | |
5af29e56 RK |
130 | .hw_init = sa1111_pcmcia_hw_init, |
131 | .hw_shutdown = sa1111_pcmcia_hw_shutdown, | |
1da177e4 LT |
132 | .socket_state = sa1111_pcmcia_socket_state, |
133 | .configure_socket = badge4_pcmcia_configure_socket, | |
134 | ||
135 | .socket_init = sa1111_pcmcia_socket_init, | |
136 | .socket_suspend = sa1111_pcmcia_socket_suspend, | |
137 | }; | |
138 | ||
139 | int pcmcia_badge4_init(struct device *dev) | |
140 | { | |
141 | int ret = -ENODEV; | |
142 | ||
143 | if (machine_is_badge4()) { | |
144 | printk(KERN_INFO | |
145 | "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n", | |
146 | __FUNCTION__, | |
147 | badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc); | |
148 | ||
149 | ret = sa11xx_drv_pcmcia_probe(dev, &badge4_pcmcia_ops, 0, 2); | |
150 | } | |
151 | ||
152 | return ret; | |
153 | } | |
154 | ||
155 | static int __init pcmv_setup(char *s) | |
156 | { | |
157 | int v[4]; | |
158 | ||
159 | s = get_options(s, ARRAY_SIZE(v), v); | |
160 | ||
161 | if (v[0] >= 1) badge4_pcmvcc = v[1]; | |
162 | if (v[0] >= 2) badge4_pcmvpp = v[2]; | |
163 | if (v[0] >= 3) badge4_cfvcc = v[3]; | |
164 | ||
165 | return 1; | |
166 | } | |
167 | ||
168 | __setup("pcmv=", pcmv_setup); |