/*
* 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\n",
__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\n",
__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\n",
__func__, state->Vcc);
ret = -1;
break;
}
if (state->Vpp != state->Vcc && state->Vpp != 0) {
printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
__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,
.socket_init = sa1111_pcmcia_socket_init,
.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");
