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| 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 | |
| 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(__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 | |
| 135 | int pcmcia_badge4_init(struct device *dev) |
| 136 | { |
| 137 | int ret = -ENODEV; |
| 138 | |
| 139 | if (machine_is_badge4()) { |
| 140 | printk(KERN_INFO |
| 141 | "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n", |
| 142 | __func__, |
| 143 | badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc); |
| 144 | |
| 145 | sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops); |
| 146 | ret = sa1111_pcmcia_add(dev, &badge4_pcmcia_ops, |
| 147 | sa11xx_drv_pcmcia_add_one); |
| 148 | } |
| 149 | |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | static int __init pcmv_setup(char *s) |
| 154 | { |
| 155 | int v[4]; |
| 156 | |
| 157 | s = get_options(s, ARRAY_SIZE(v), v); |
| 158 | |
| 159 | if (v[0] >= 1) badge4_pcmvcc = v[1]; |
| 160 | if (v[0] >= 2) badge4_pcmvpp = v[2]; |
| 161 | if (v[0] >= 3) badge4_cfvcc = v[3]; |
| 162 | |
| 163 | return 1; |
| 164 | } |
| 165 | |
| 166 | __setup("pcmv=", pcmv_setup); |
| 167 |
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