/*
   * linux/drivers/pcmcia/pxa2xx_lubbock.c
   *
   * Author:	George Davis
   * Created:	Jan 10, 2002
   * Copyright:	MontaVista Software Inc.
   *
   * 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.
   *
   * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
   *
   * Lubbock PCMCIA specific routines.
   *
   */
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/device.h>
  #include <linux/errno.h>
  #include <linux/init.h>
  #include <linux/delay.h>
  
  #include <mach/hardware.h>
  #include <asm/hardware/sa1111.h>
  #include <asm/mach-types.h>
  #include <mach/lubbock.h>
  
  #include "sa1111_generic.h"
  
  static int
  lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  				const socket_state_t *state)
  {
  	struct sa1111_pcmcia_socket *s = to_skt(skt);
  	unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
  	int ret = 0;
  
  	pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
  
  	/* Lubbock uses the Maxim MAX1602, with the following connections:
  	 *
  	 * Socket 0 (PCMCIA):
  	 *	MAX1602	Lubbock		Register
  	 *	Pin	Signal
  	 *	-----	-------		----------------------
  	 *	A0VPP	S0_PWR0		SA-1111 GPIO A<0>
  	 *	A1VPP	S0_PWR1		SA-1111 GPIO A<1>
  	 *	A0VCC	S0_PWR2		SA-1111 GPIO A<2>
  	 *	A1VCC	S0_PWR3		SA-1111 GPIO A<3>
  	 *	VX	VCC
  	 *	VY	+3.3V
  	 *	12IN	+12V
  	 *	CODE	+3.3V		Cirrus  Code, CODE = High (VY)
  	 *
  	 * Socket 1 (CF):
  	 *	MAX1602	Lubbock		Register
  	 *	Pin	Signal
  	 *	-----	-------		----------------------
  	 *	A0VPP	GND		VPP is not connected
  	 *	A1VPP	GND		VPP is not connected
  	 *	A0VCC	S1_PWR0		MISC_WR<14>
  	 *	A1VCC	S1_PWR1		MISC_WR<15>
  	 *	VX	VCC
  	 *	VY	+3.3V
  	 *	12IN	GND		VPP is not connected
  	 *	CODE	+3.3V		Cirrus  Code, CODE = High (VY)
  	 *
  	 */
  
   again:
  	switch (skt->nr) {
  	case 0:
  		pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
  
  		switch (state->Vcc) {
  		case 0: /* Hi-Z */
  			break;
  
  		case 33: /* VY */
  			pa_dwr_set |= GPIO_A3;
  			break;
  
  		case 50: /* VX */
  			pa_dwr_set |= GPIO_A2;
  			break;
  
  		default:
  			printk(KERN_ERR "%s(): unrecognized Vcc %u
  ",
  			       __func__, state->Vcc);
  			ret = -1;
  		}
  
  		switch (state->Vpp) {
  		case 0: /* Hi-Z */
  			break;
  
  		case 120: /* 12IN */
  			pa_dwr_set |= GPIO_A1;
  			break;
  
  		default: /* VCC */
  			if (state->Vpp == state->Vcc)
  				pa_dwr_set |= GPIO_A0;
  			else {
  				printk(KERN_ERR "%s(): unrecognized Vpp %u
  ",
  				       __func__, state->Vpp);
  				ret = -1;
  				break;
  			}
  		}
  		break;
  
  	case 1:
  		misc_mask = (1 << 15) | (1 << 14);
  
  		switch (state->Vcc) {
  		case 0: /* Hi-Z */
  			break;
  
  		case 33: /* VY */
  			misc_set |= 1 << 15;
  			break;
  
  		case 50: /* VX */
  			misc_set |= 1 << 14;
  			break;
  
  		default:
  			printk(KERN_ERR "%s(): unrecognized Vcc %u
  ",
  			       __func__, state->Vcc);
  			ret = -1;
  			break;
  		}
  
  		if (state->Vpp != state->Vcc && state->Vpp != 0) {
  			printk(KERN_ERR "%s(): CF slot cannot support Vpp %u
  ",
  			       __func__, state->Vpp);
  			ret = -1;
  			break;
  		}
  		break;
  
  	default:
  		ret = -1;
  	}
  
  	if (ret == 0)
  		ret = sa1111_pcmcia_configure_socket(skt, state);
  
  	if (ret == 0) {
  		lubbock_set_misc_wr(misc_mask, misc_set);
  		sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
  	}
  
  #if 1
  	if (ret == 0 && state->Vcc == 33) {
  		struct pcmcia_state new_state;
  
  		/*
  		 * HACK ALERT:
  		 * We can't sense the voltage properly on Lubbock before
  		 * actually applying some power to the socket (catch 22).
  		 * Resense the socket Voltage Sense pins after applying
  		 * socket power.
  		 *
  		 * Note: It takes about 2.5ms for the MAX1602 VCC output
  		 * to rise.
  		 */
  		mdelay(3);
  
  		sa1111_pcmcia_socket_state(skt, &new_state);
  
  		if (!new_state.vs_3v && !new_state.vs_Xv) {
  			/*
  			 * Switch to 5V,  Configure socket with 5V voltage
  			 */
  			lubbock_set_misc_wr(misc_mask, 0);
  			sa1111_set_io(s->dev, pa_dwr_mask, 0);
  
  			/*
  			 * It takes about 100ms to turn off Vcc.
  			 */
  			mdelay(100);
  
  			/*
  			 * We need to hack around the const qualifier as
  			 * well to keep this ugly workaround localized and
  			 * not force it to the rest of the code. Barf bags
  			 * available in the seat pocket in front of you!
  			 */
  			((socket_state_t *)state)->Vcc = 50;
  			((socket_state_t *)state)->Vpp = 50;
  			goto again;
  		}
  	}
  #endif
  
  	return ret;
  }
  
  static struct pcmcia_low_level lubbock_pcmcia_ops = {
  	.owner			= THIS_MODULE,
  	.configure_socket	= lubbock_pcmcia_configure_socket,
  	.first			= 0,
  	.nr			= 2,
  };
  
  #include "pxa2xx_base.h"
  
  int pcmcia_lubbock_init(struct sa1111_dev *sadev)
  {
  	int ret = -ENODEV;
  
  	if (machine_is_lubbock()) {
  		/*
  		 * Set GPIO_A<3:0> to be outputs for the MAX1600,
  		 * and switch to standby mode.
  		 */
  		sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
  		sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
  		sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
  
  		/* Set CF Socket 1 power to standby mode. */
  		lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
  
  		pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
  		pxa2xx_configure_sockets(&sadev->dev);
  		ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
  				pxa2xx_drv_pcmcia_add_one);
  	}
  
  	return ret;
  }
  
  MODULE_LICENSE("GPL");