/*
   * linux/drivers/pcmcia/sa1100_badge4.c
   *
   * BadgePAD 4 PCMCIA specific routines
   *
   *   Christopher Hoover <ch@hpl.hp.com>
   *
   * Copyright (C) 2002 Hewlett-Packard Company
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   */
  #include <linux/module.h>
  #include <linux/kernel.h>

  #include <linux/device.h>
  #include <linux/errno.h>
  #include <linux/init.h>

  #include <mach/hardware.h>

  #include <asm/mach-types.h>

  #include <mach/badge4.h>

  #include <asm/hardware/sa1111.h>
  
  #include "sa1111_generic.h"
  
  /*
   * BadgePAD 4 Details
   *
   * PCM Vcc:
   *
   *  PCM Vcc on BadgePAD 4 can be jumpered for 3v3 (short pins 1 and 3
   *  on JP6) or 5v0 (short pins 3 and 5 on JP6).
   *
   * PCM Vpp:
   *
   *  PCM Vpp on BadgePAD 4 can be jumpered for 12v0 (short pins 4 and 6
   *  on JP6) or tied to PCM Vcc (short pins 2 and 4 on JP6).  N.B.,
   *  12v0 operation requires that the power supply actually supply 12v0
   *  via pin 7 of JP7.
   *
   * CF Vcc:
   *
   *  CF Vcc on BadgePAD 4 can be jumpered either for 3v3 (short pins 1
   *  and 2 on JP10) or 5v0 (short pins 2 and 3 on JP10).
   *
   * Unfortunately there's no way programmatically to determine how a
   * given board is jumpered.  This code assumes a default jumpering
   * as described below.
   *
   * If the defaults aren't correct, you may override them with a pcmv
   * setup argument: pcmv=<pcm vcc>,<pcm vpp>,<cf vcc>.  The units are
   * tenths of volts; e.g. pcmv=33,120,50 indicates 3v3 PCM Vcc, 12v0
   * PCM Vpp, and 5v0 CF Vcc.
   *
   */
  
  static int badge4_pcmvcc = 50;  /* pins 3 and 5 jumpered on JP6 */
  static int badge4_pcmvpp = 50;  /* pins 2 and 4 jumpered on JP6 */
  static int badge4_cfvcc = 33;   /* pins 1 and 2 jumpered on JP10 */
  
  static void complain_about_jumpering(const char *whom,
  				     const char *supply,
  				     int given, int wanted)
  {
  	printk(KERN_ERR
  	 "%s: %s %d.%dV wanted but board is jumpered for %s %d.%dV operation"
  	 "; re-jumper the board and/or use pcmv=xx,xx,xx
  ",
  	       whom, supply,
  	       wanted / 10, wanted % 10,
  	       supply,
  	       given / 10, given % 10);
  }
  
  static int
  badge4_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  {
  	int ret;
  
  	switch (skt->nr) {
  	case 0:
  		if ((state->Vcc != 0) &&
  		    (state->Vcc != badge4_pcmvcc)) {

  			complain_about_jumpering(__func__, "pcmvcc",

  						 badge4_pcmvcc, state->Vcc);
  			// Apply power regardless of the jumpering.
  			// return -1;
  		}
  		if ((state->Vpp != 0) &&
  		    (state->Vpp != badge4_pcmvpp)) {

  			complain_about_jumpering(__func__, "pcmvpp",

  						 badge4_pcmvpp, state->Vpp);
  			return -1;
  		}
  		break;
  
  	case 1:
  		if ((state->Vcc != 0) &&
  		    (state->Vcc != badge4_cfvcc)) {

  			complain_about_jumpering(__func__, "cfvcc",

  						 badge4_cfvcc, state->Vcc);
  			return -1;
  		}
  		break;
  
  	default:
  		return -1;
  	}
  
  	ret = sa1111_pcmcia_configure_socket(skt, state);
  	if (ret == 0) {
  		unsigned long flags;
  		int need5V;
  
  		local_irq_save(flags);
  
  		need5V = ((state->Vcc == 50) || (state->Vpp == 50));
  
  		badge4_set_5V(BADGE4_5V_PCMCIA_SOCK(skt->nr), need5V);
  
  		local_irq_restore(flags);
  	}

  	return ret;

  }
  
  static struct pcmcia_low_level badge4_pcmcia_ops = {
  	.owner			= THIS_MODULE,

  	.configure_socket	= badge4_pcmcia_configure_socket,

  	.first			= 0,
  	.nr			= 2,

  };

  int pcmcia_badge4_init(struct sa1111_dev *dev)

  {

  	printk(KERN_INFO
  	       "%s: badge4_pcmvcc=%d, badge4_pcmvpp=%d, badge4_cfvcc=%d
  ",
  	       __func__,
  	       badge4_pcmvcc, badge4_pcmvpp, badge4_cfvcc);
  
  	sa11xx_drv_pcmcia_ops(&badge4_pcmcia_ops);
  	return sa1111_pcmcia_add(dev, &badge4_pcmcia_ops,
  				 sa11xx_drv_pcmcia_add_one);

  }
  
  static int __init pcmv_setup(char *s)
  {
  	int v[4];
  
  	s = get_options(s, ARRAY_SIZE(v), v);
  
  	if (v[0] >= 1) badge4_pcmvcc = v[1];
  	if (v[0] >= 2) badge4_pcmvpp = v[2];
  	if (v[0] >= 3) badge4_cfvcc = v[3];
  
  	return 1;
  }
  
  __setup("pcmv=", pcmv_setup);