/*
*
* Alchemy Semi Db1x00 boards specific pcmcia routines.
*
* Copyright 2002 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* Copyright 2004 Pete Popov, updated the driver to 2.6.
* Followed the sa11xx API and largely copied many of the hardware
* independent functions.
*
* ########################################################################
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* ########################################################################
*
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/init.h>
#include <asm/irq.h>
#include <asm/signal.h>
#include <asm/mach-au1x00/au1000.h>
#if defined(CONFIG_MIPS_DB1200)
#include <db1200.h>
#elif defined(CONFIG_MIPS_PB1200)
#include <pb1200.h>
#else
#include <asm/mach-db1x00/db1x00.h>
static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
#endif
#include "au1000_generic.h"
#if 0
#define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
#else
#define debug(x,args...)
#endif
struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS];
extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int);
static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt)
{
#ifdef CONFIG_MIPS_DB1550
skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3;
#elif defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
skt->irq = skt->nr ? BOARD_PC1_INT : BOARD_PC0_INT;
#else
skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2;
#endif
return 0;
}
static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt)
{
bcsr->pcmcia = 0; /* turn off power */
au_sync_delay(2);
}
static void
db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state)
{
u32 inserted;
unsigned char vs;
state->ready = 0;
state->vs_Xv = 0;
state->vs_3v = 0;
state->detect = 0;
switch (skt->nr) {
case 0:
vs = bcsr->status & 0x3;
#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
inserted = BOARD_CARD_INSERTED(0);
#else
inserted = !(bcsr->status & (1<<4));
#endif
break;
case 1:
vs = (bcsr->status & 0xC)>>2;
#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
inserted = BOARD_CARD_INSERTED(1);
#else
inserted = !(bcsr->status & (1<<5));
#endif
break;
default:/* should never happen */
return;
}
if (inserted)
debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n",
skt->nr, inserted, vs, bcsr->pcmcia);
if (inserted) {
switch (vs) {
case 0:
case 2:
state->vs_3v=1;
break;
case 3: /* 5V */
break;
default:
/* return without setting 'detect' */
printk(KERN_ERR "db1x00 bad VS (%d)\n",
vs);
}
state->detect = 1;
state->ready = 1;
}
else {
/* if the card was previously inserted and then ejected,
* we should turn off power to it
*/
if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) {
bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST |
BCSR_PCMCIA_PC0DRVEN |
BCSR_PCMCIA_PC0VPP |
BCSR_PCMCIA_PC0VCC);
au_sync_delay(10);
}
else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) {
bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST |
BCSR_PCMCIA_PC1DRVEN |
BCSR_PCMCIA_PC1VPP |
BCSR_PCMCIA_PC1VCC);
au_sync_delay(10);
}
}
state->bvd1=1;
state->bvd2=1;
state->wrprot=0;
}
static int
db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state)
{
u16 pwr;
int sock = skt->nr;
debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n",
sock, state->Vcc, state->Vpp,
state->flags & SS_RESET);
/* pcmcia reg was set to zero at init time. Be careful when
* initializing a socket not to wipe out the settings of the
* other socket.
*/
pwr = bcsr->pcmcia;
pwr &= ~(0xf << sock*8); /* clear voltage settings */
state->Vpp = 0;
switch(state->Vcc){
case 0: /* Vcc 0 */
pwr |= SET_VCC_VPP(0,0,sock);
break;
case 50: /* Vcc 5V */
switch(state->Vpp) {
case 0:
pwr |= SET_VCC_VPP(2,0,sock);
break;
case 50:
pwr |= SET_VCC_VPP(2,1,sock);
break;
case 12:
pwr |= SET_VCC_VPP(2,2,sock);
break;
case 33:
default:
pwr |= SET_VCC_VPP(0,0,sock);
printk("%s: bad Vcc/Vpp (%d:%d)\n",
__FUNCTION__,
state->Vcc,
state->Vpp);
break;
}
break;
case 33: /* Vcc 3.3V */
switch(state->Vpp) {
case 0:
pwr |= SET_VCC_VPP(1,0,sock);
break;
case 12:
pwr |= SET_VCC_VPP(1,2,sock);
break;
case 33:
pwr |= SET_VCC_VPP(1,1,sock);
break;
case 50:
default:
pwr |= SET_VCC_VPP(0,0,sock);
printk("%s: bad Vcc/Vpp (%d:%d)\n",
__FUNCTION__,
state->Vcc,
state->Vpp);
break;
}
break;
default: /* what's this ? */
pwr |= SET_VCC_VPP(0,0,sock);
printk(KERN_ERR "%s: bad Vcc %d\n",
__FUNCTION__, state->Vcc);
break;
}
bcsr->pcmcia = pwr;
au_sync_delay(300);
if (sock == 0) {
if (!(state->flags & SS_RESET)) {
pwr |= BCSR_PCMCIA_PC0DRVEN;
bcsr->pcmcia = pwr;
au_sync_delay(300);
pwr |= BCSR_PCMCIA_PC0RST;
bcsr->pcmcia = pwr;
au_sync_delay(100);
}
else {
pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
bcsr->pcmcia = pwr;
au_sync_delay(100);
}
}
else {
if (!(state->flags & SS_RESET)) {
pwr |= BCSR_PCMCIA_PC1DRVEN;
bcsr->pcmcia = pwr;
au_sync_delay(300);
pwr |= BCSR_PCMCIA_PC1RST;
bcsr->pcmcia = pwr;
au_sync_delay(100);
}
else {
pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
bcsr->pcmcia = pwr;
au_sync_delay(100);
}
}
return 0;
}
/*
* Enable card status IRQs on (re-)initialisation. This can
* be called at initialisation, power management event, or
* pcmcia event.
*/
void db1x00_socket_init(struct au1000_pcmcia_socket *skt)
{
/* nothing to do for now */
}
/*
* Disable card status IRQs and PCMCIA bus on suspend.
*/
void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt)
{
/* nothing to do for now */
}
struct pcmcia_low_level db1x00_pcmcia_ops = {
.owner = THIS_MODULE,
.hw_init = db1x00_pcmcia_hw_init,
.hw_shutdown = db1x00_pcmcia_shutdown,
.socket_state = db1x00_pcmcia_socket_state,
.configure_socket = db1x00_pcmcia_configure_socket,
.socket_init = db1x00_socket_init,
.socket_suspend = db1x00_socket_suspend
};
int __init au1x_board_init(struct device *dev)
{
int ret = -ENODEV;
bcsr->pcmcia = 0; /* turn off power, if it's not already off */
au_sync_delay(2);
ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
return ret;
}
