159 строки
3.7 KiB
C
159 строки
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/pcmcia/sa1100_badge4.c
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*
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* BadgePAD 4 PCMCIA specific routines
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*
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* Christopher Hoover <ch@hpl.hp.com>
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*
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* Copyright (C) 2002 Hewlett-Packard Company
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <mach/badge4.h>
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#include <asm/hardware/sa1111.h>
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#include "sa1111_generic.h"
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/*
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* BadgePAD 4 Details
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*
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* PCM Vcc:
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*
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* PCM Vcc on BadgePAD 4 can be jumpered for 3v3 (short pins 1 and 3
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* on JP6) or 5v0 (short pins 3 and 5 on JP6).
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*
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* PCM Vpp:
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*
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* PCM Vpp on BadgePAD 4 can be jumpered for 12v0 (short pins 4 and 6
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* on JP6) or tied to PCM Vcc (short pins 2 and 4 on JP6). N.B.,
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* 12v0 operation requires that the power supply actually supply 12v0
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* via pin 7 of JP7.
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*
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* CF Vcc:
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*
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* CF Vcc on BadgePAD 4 can be jumpered either for 3v3 (short pins 1
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* and 2 on JP10) or 5v0 (short pins 2 and 3 on JP10).
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*
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* Unfortunately there's no way programmatically to determine how a
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* given board is jumpered. This code assumes a default jumpering
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* as described below.
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*
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* If the defaults aren't correct, you may override them with a pcmv
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* setup argument: pcmv=<pcm vcc>,<pcm vpp>,<cf vcc>. The units are
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* tenths of volts; e.g. pcmv=33,120,50 indicates 3v3 PCM Vcc, 12v0
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* PCM Vpp, and 5v0 CF Vcc.
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*
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*/
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static int badge4_pcmvcc = 50; /* pins 3 and 5 jumpered on JP6 */
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static int badge4_pcmvpp = 50; /* pins 2 and 4 jumpered on JP6 */
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static int badge4_cfvcc = 33; /* pins 1 and 2 jumpered on JP10 */
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static void complain_about_jumpering(const char *whom,
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const char *supply,
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int given, int wanted)
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{
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printk(KERN_ERR
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"%s: %s %d.%dV wanted but board is jumpered for %s %d.%dV operation"
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"; re-jumper the board and/or use pcmv=xx,xx,xx\n",
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whom, supply,
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wanted / 10, wanted % 10,
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supply,
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given / 10, given % 10);
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}
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static int
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badge4_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
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{
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int ret;
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switch (skt->nr) {
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case 0:
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if ((state->Vcc != 0) &&
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(state->Vcc != badge4_pcmvcc)) {
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complain_about_jumpering(__func__, "pcmvcc",
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badge4_pcmvcc, state->Vcc);
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// Apply power regardless of the jumpering.
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// return -1;
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}
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if ((state->Vpp != 0) &&
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(state->Vpp != badge4_pcmvpp)) {
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complain_about_jumpering(__func__, "pcmvpp",
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badge4_pcmvpp, state->Vpp);
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return -1;
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}
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break;
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case 1:
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if ((state->Vcc != 0) &&
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(state->Vcc != badge4_cfvcc)) {
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complain_about_jumpering(__func__, "cfvcc",
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badge4_cfvcc, state->Vcc);
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return -1;
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}
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break;
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default:
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return -1;
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}
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ret = sa1111_pcmcia_configure_socket(skt, state);
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if (ret == 0) {
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unsigned long flags;
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int need5V;
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local_irq_save(flags);
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need5V = ((state->Vcc == 50) || (state->Vpp == 50));
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badge4_set_5V(BADGE4_5V_PCMCIA_SOCK(skt->nr), need5V);
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local_irq_restore(flags);
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}
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return ret;
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}
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static struct pcmcia_low_level badge4_pcmcia_ops = {
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.owner = THIS_MODULE,
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.configure_socket = badge4_pcmcia_configure_socket,
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.first = 0,
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.nr = 2,
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};
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int pcmcia_badge4_init(struct sa1111_dev *dev)
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{
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printk(KERN_INFO
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"%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d\n",
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__func__,
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badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc);
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sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops);
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return sa1111_pcmcia_add(dev, &badge4_pcmcia_ops,
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sa11xx_drv_pcmcia_add_one);
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}
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#ifndef MODULE
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static int __init pcmv_setup(char *s)
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{
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int v[4];
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s = get_options(s, ARRAY_SIZE(v), v);
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if (v[0] >= 1) badge4_pcmvcc = v[1];
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if (v[0] >= 2) badge4_pcmvpp = v[2];
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if (v[0] >= 3) badge4_cfvcc = v[3];
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return 1;
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}
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__setup("pcmv=", pcmv_setup);
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#endif
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