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linux-sg2042/drivers/pcmcia/au1000_pb1x00.c

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/*
*
* Alchemy Semi Pb1000 boards specific pcmcia routines.
*
* Copyright 2002 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* ########################################################################
*
* 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/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/types.h>
#include <pcmcia/cs.h>
#include <pcmcia/ss.h>
#include <pcmcia/cistpl.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/au1000.h>
#include <asm/au1000_pcmcia.h>
#define debug(fmt, arg...) do { } while (0)
#include <asm/pb1000.h>
#define PCMCIA_IRQ AU1000_GPIO_15
static int pb1x00_pcmcia_init(struct pcmcia_init *init)
{
u16 pcr;
pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
au_sync_delay(100);
au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
au_sync();
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
au_writel(pcr, PB1000_PCR);
au_sync_delay(20);
return PCMCIA_NUM_SOCKS;
}
static int pb1x00_pcmcia_shutdown(void)
{
u16 pcr;
pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
au_writel(pcr, PB1000_PCR);
au_sync_delay(20);
return 0;
}
static int
pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
{
u32 inserted0, inserted1;
u16 vs0, vs1;
vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
vs0 = (vs0 >> 4) & 0x3;
vs1 = (vs1 >> 12) & 0x3;
state->ready = 0;
state->vs_Xv = 0;
state->vs_3v = 0;
state->detect = 0;
if (sock == 0) {
if (inserted0) {
switch (vs0) {
case 0:
case 2:
state->vs_3v=1;
break;
case 3: /* 5V */
break;
default:
/* return without setting 'detect' */
printk(KERN_ERR "pb1x00 bad VS (%d)\n",
vs0);
return 0;
}
state->detect = 1;
}
}
else {
if (inserted1) {
switch (vs1) {
case 0:
case 2:
state->vs_3v=1;
break;
case 3: /* 5V */
break;
default:
/* return without setting 'detect' */
printk(KERN_ERR "pb1x00 bad VS (%d)\n",
vs1);
return 0;
}
state->detect = 1;
}
}
if (state->detect) {
state->ready = 1;
}
state->bvd1=1;
state->bvd2=1;
state->wrprot=0;
return 1;
}
static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
{
if(info->sock > PCMCIA_MAX_SOCK) return -1;
/*
* Even in the case of the Pb1000, both sockets are connected
* to the same irq line.
*/
info->irq = PCMCIA_IRQ;
return 0;
}
static int
pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
{
u16 pcr;
if(configure->sock > PCMCIA_MAX_SOCK) return -1;
pcr = au_readl(PB1000_PCR);
if (configure->sock == 0) {
pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
}
else {
pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
}
pcr &= ~PCR_SLOT_0_RST;
debug("Vcc %dV Vpp %dV, pcr %x\n",
configure->vcc, configure->vpp, pcr);
switch(configure->vcc){
case 0: /* Vcc 0 */
switch(configure->vpp) {
case 0:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
configure->sock);
break;
case 12:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
configure->sock);
break;
case 50:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
configure->sock);
break;
case 33:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
configure->sock);
break;
default:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
configure->sock);
printk("%s: bad Vcc/Vpp (%d:%d)\n",
__func__,
configure->vcc,
configure->vpp);
break;
}
break;
case 50: /* Vcc 5V */
switch(configure->vpp) {
case 0:
pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
configure->sock);
break;
case 50:
pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
configure->sock);
break;
case 12:
pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
configure->sock);
break;
case 33:
pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
configure->sock);
break;
default:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
configure->sock);
printk("%s: bad Vcc/Vpp (%d:%d)\n",
__func__,
configure->vcc,
configure->vpp);
break;
}
break;
case 33: /* Vcc 3.3V */
switch(configure->vpp) {
case 0:
pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
configure->sock);
break;
case 50:
pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
configure->sock);
break;
case 12:
pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
configure->sock);
break;
case 33:
pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
configure->sock);
break;
default:
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
configure->sock);
printk("%s: bad Vcc/Vpp (%d:%d)\n",
__func__,
configure->vcc,
configure->vpp);
break;
}
break;
default: /* what's this ? */
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
printk(KERN_ERR "%s: bad Vcc %d\n",
__func__, configure->vcc);
break;
}
if (configure->sock == 0) {
pcr &= ~(PCR_SLOT_0_RST);
if (configure->reset)
pcr |= PCR_SLOT_0_RST;
}
else {
pcr &= ~(PCR_SLOT_1_RST);
if (configure->reset)
pcr |= PCR_SLOT_1_RST;
}
au_writel(pcr, PB1000_PCR);
au_sync_delay(300);
return 0;
}
struct pcmcia_low_level pb1x00_pcmcia_ops = {
pb1x00_pcmcia_init,
pb1x00_pcmcia_shutdown,
pb1x00_pcmcia_socket_state,
pb1x00_pcmcia_get_irq_info,
pb1x00_pcmcia_configure_socket
};
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