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MIPS: PCMCIA: new socket driver for Au1000 demoboards. 

New PCMCIA socket driver for all Db/Pb1xxx boards (except Pb1000),
which replaces au1000_db1x00.c and (most of) au1000_pb1x00.c.
Notable improvements:
        - supports Db1000, DB/PB1100/1500/1550/1200.
        - support for carddetect and statuschange IRQs.
        - pcmcia socket mem/io/attr areas and irqs passed through
          platform resource information.
        - doesn't freeze system during card insertion/ejection like
          the one it replaces.
        - boardtype is automatically detected using BCSR ID register.

Run-tested on the DB1200.

Cc: Linux-PCMCIA <linux-pcmcia@lists.infradead.org>
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Manuel Lauss 2009-10-04 14:55:27 +02:00 committed by Ralf Baechle
parent 7e50b2b741
commit 66213b3ccf
9 changed files with 660 additions and 451 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/mips/alchemy/common/platform.c
View File

@ -308,11 +308,6 @@ static struct platform_device au1200_mmc1_device = {
#endif /* #ifndef CONFIG_MIPS_DB1200 */
#endif /* #ifdef CONFIG_SOC_AU1200 */
static struct platform_device au1x00_pcmcia_device = {
.name = "au1x00-pcmcia",
.id = 0,
};
/* All Alchemy demoboards with I2C have this #define in their headers */
#ifdef SMBUS_PSC_BASE
static struct resource pbdb_smbus_resources[] = {
@ -334,7 +329,6 @@ static struct platform_device pbdb_smbus_device = {
static struct platform_device *au1xxx_platform_devices[] __initdata = {
&au1xx0_uart_device,
&au1xxx_usb_ohci_device,
&au1x00_pcmcia_device,
#ifdef CONFIG_FB_AU1100
&au1100_lcd_device,
#endif

3
arch/mips/alchemy/common/setup.c
View File

@ -107,7 +107,8 @@ phys_t __fixup_bigphys_addr(phys_t phys_addr, phys_t size)
* The pseudo address we use is 0xF400 0000. Any address over
* 0xF400 0000 is a PCMCIA pseudo address.
*/
if ((phys_addr >= 0xF4000000) && (phys_addr < 0xFFFFFFFF))
if ((phys_addr >= PCMCIA_ATTR_PSEUDO_PHYS) &&
(phys_addr < PCMCIA_PSEUDO_END))
return (phys_t)(phys_addr << 4);
/* default nop */

14
arch/mips/include/asm/mach-au1x00/au1000.h
View File

@ -1724,6 +1724,20 @@ enum soc_au1200_ints {
#endif
/*
* All Au1xx0 SOCs have a PCMCIA controller.
* We setup our 32-bit pseudo addresses to be equal to the
* 36-bit addr >> 4, to make it easier to check the address
* and fix it.
* The PCMCIA socket 0 physical attribute address is 0xF 4000 0000.
* The pseudo address we use is 0xF400 0000. Any address over
* 0xF400 0000 is a PCMCIA pseudo address.
*/
#define PCMCIA_IO_PSEUDO_PHYS (PCMCIA_IO_PHYS_ADDR >> 4)
#define PCMCIA_ATTR_PSEUDO_PHYS (PCMCIA_ATTR_PHYS_ADDR >> 4)
#define PCMCIA_MEM_PSEUDO_PHYS (PCMCIA_MEM_PHYS_ADDR >> 4)
#define PCMCIA_PSEUDO_END (0xffffffff)
#ifndef _LANGUAGE_ASSEMBLY
typedef volatile struct {
/* 0x0000 */ u32 toytrim;

11
drivers/pcmcia/Kconfig
View File

@ -174,6 +174,17 @@ config PCMCIA_AU1X00
tristate "Au1x00 pcmcia support"
depends on SOC_AU1X00 && PCMCIA
config PCMCIA_ALCHEMY_DEVBOARD
tristate "Alchemy Db/Pb1xxx PCMCIA socket services"
depends on SOC_AU1X00 && PCMCIA
select 64BIT_PHYS_ADDR
help
Enable this driver of you want PCMCIA support on your Alchemy
Db1000, Db/Pb1100, Db/Pb1500, Db/Pb1550, Db/Pb1200 board.
NOT suitable for the PB1000!
This driver is also available as a module called db1xxx_ss.ko
config PCMCIA_BCM63XX
tristate "bcm63xx pcmcia support"
depends on BCM63XX && PCMCIA

9
drivers/pcmcia/Makefile
View File

@ -35,17 +35,10 @@ obj-$(CONFIG_OMAP_CF) += omap_cf.o
obj-$(CONFIG_BFIN_CFPCMCIA) += bfin_cf_pcmcia.o
obj-$(CONFIG_AT91_CF) += at91_cf.o
obj-$(CONFIG_ELECTRA_CF) += electra_cf.o
obj-$(CONFIG_PCMCIA_ALCHEMY_DEVBOARD) += db1xxx_ss.o
au1x00_ss-y += au1000_generic.o
au1x00_ss-$(CONFIG_MIPS_PB1000) += au1000_pb1x00.o
au1x00_ss-$(CONFIG_MIPS_PB1100) += au1000_pb1x00.o
au1x00_ss-$(CONFIG_MIPS_PB1200) += au1000_db1x00.o
au1x00_ss-$(CONFIG_MIPS_PB1500) += au1000_pb1x00.o
au1x00_ss-$(CONFIG_MIPS_DB1000) += au1000_db1x00.o
au1x00_ss-$(CONFIG_MIPS_DB1100) += au1000_db1x00.o
au1x00_ss-$(CONFIG_MIPS_DB1200) += au1000_db1x00.o
au1x00_ss-$(CONFIG_MIPS_DB1500) += au1000_db1x00.o
au1x00_ss-$(CONFIG_MIPS_DB1550) += au1000_db1x00.o
au1x00_ss-$(CONFIG_MIPS_XXS1500) += au1000_xxs1500.o
sa1111_cs-y += sa1111_generic.o

307
drivers/pcmcia/au1000_db1x00.c
View File

@ -1,307 +0,0 @@
/*
*
* 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/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>
#endif
#include <asm/mach-db1x00/bcsr.h>
#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_write(BCSR_PCMCIA, 0); /* turn off power */
msleep(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_read(BCSR_STATUS) & 0x3;
#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
inserted = BOARD_CARD_INSERTED(0);
#else
inserted = !(bcsr_read(BCSR_STATUS) & (1 << 4));
#endif
break;
case 1:
vs = (bcsr_read(BCSR_STATUS) & 0xC) >> 2;
#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
inserted = BOARD_CARD_INSERTED(1);
#else
inserted = !(bcsr_read(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_read(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_read(BCSR_PCMCIA) & BCSR_PCMCIA_PC0RST)) {
bcsr_mod(BCSR_PCMCIA, BCSR_PCMCIA_PC0RST |
BCSR_PCMCIA_PC0DRVEN |
BCSR_PCMCIA_PC0VPP |
BCSR_PCMCIA_PC0VCC, 0);
msleep(10);
}
else if ((skt->nr == 1) &&
(bcsr_read(BCSR_PCMCIA) & BCSR_PCMCIA_PC1RST)) {
bcsr_mod(BCSR_PCMCIA, BCSR_PCMCIA_PC1RST |
BCSR_PCMCIA_PC1DRVEN |
BCSR_PCMCIA_PC1VPP |
BCSR_PCMCIA_PC1VCC, 0);
msleep(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_read(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",
__func__,
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",
__func__,
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",
__func__, state->Vcc);
break;
}
bcsr_write(BCSR_PCMCIA, pwr);
msleep(300);
if (sock == 0) {
if (!(state->flags & SS_RESET)) {
pwr |= BCSR_PCMCIA_PC0DRVEN;
bcsr_write(BCSR_PCMCIA, pwr);
msleep(300);
pwr |= BCSR_PCMCIA_PC0RST;
bcsr_write(BCSR_PCMCIA, pwr);
msleep(100);
}
else {
pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
bcsr_write(BCSR_PCMCIA, pwr);
msleep(100);
}
}
else {
if (!(state->flags & SS_RESET)) {
pwr |= BCSR_PCMCIA_PC1DRVEN;
bcsr_write(BCSR_PCMCIA, pwr);
msleep(300);
pwr |= BCSR_PCMCIA_PC1RST;
bcsr_write(BCSR_PCMCIA, pwr);
msleep(100);
}
else {
pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
bcsr_write(BCSR_PCMCIA, pwr);
msleep(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 au1x_board_init(struct device *dev)
{
int ret = -ENODEV;
bcsr_write(BCSR_PCMCIA, 0); /* turn off power, if it's not already off */
msleep(2);
ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
return ret;
}

12
drivers/pcmcia/au1000_generic.h
View File

@ -44,22 +44,12 @@
/* pcmcia socket 1 needs external glue logic so the memory map
* differs from board to board.
*/
#if defined(CONFIG_MIPS_PB1000) || defined(CONFIG_MIPS_PB1100) || \
defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1550) || \
defined(CONFIG_MIPS_PB1200)
#if defined(CONFIG_MIPS_PB1000)
#define AU1X_SOCK1_IO 0xF08000000ULL
#define AU1X_SOCK1_PHYS_ATTR 0xF48000000ULL
#define AU1X_SOCK1_PHYS_MEM 0xF88000000ULL
#define AU1X_SOCK1_PSEUDO_PHYS_ATTR 0xF4800000
#define AU1X_SOCK1_PSEUDO_PHYS_MEM 0xF8800000
#elif defined(CONFIG_MIPS_DB1000) || defined(CONFIG_MIPS_DB1100) || \
defined(CONFIG_MIPS_DB1500) || defined(CONFIG_MIPS_DB1550) || \
defined(CONFIG_MIPS_DB1200)
#define AU1X_SOCK1_IO 0xF04000000ULL
#define AU1X_SOCK1_PHYS_ATTR 0xF44000000ULL
#define AU1X_SOCK1_PHYS_MEM 0xF84000000ULL
#define AU1X_SOCK1_PSEUDO_PHYS_ATTR 0xF4400000
#define AU1X_SOCK1_PSEUDO_PHYS_MEM 0xF8400000
#endif
struct pcmcia_state {

119
drivers/pcmcia/au1000_pb1x00.c
View File

@ -1,6 +1,6 @@
/*
*
* Alchemy Semi Pb1x00 boards specific pcmcia routines.
* Alchemy Semi Pb1000 boards specific pcmcia routines.
*
* Copyright 2002 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
@ -46,20 +46,11 @@
#define debug(fmt, arg...) do { } while (0)
#ifdef CONFIG_MIPS_PB1000
#include <asm/pb1000.h>
#define PCMCIA_IRQ AU1000_GPIO_15
#elif defined (CONFIG_MIPS_PB1500)
#include <asm/pb1500.h>
#define PCMCIA_IRQ AU1500_GPIO_203
#elif defined (CONFIG_MIPS_PB1100)
#include <asm/pb1100.h>
#define PCMCIA_IRQ AU1000_GPIO_11
#endif
static int pb1x00_pcmcia_init(struct pcmcia_init *init)
{
#ifdef CONFIG_MIPS_PB1000
u16 pcr;
pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
@ -74,21 +65,10 @@ static int pb1x00_pcmcia_init(struct pcmcia_init *init)
au_sync_delay(20);
return PCMCIA_NUM_SOCKS;
#else /* fixme -- take care of the Pb1500 at some point */
u16 pcr;
pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
au_writew(pcr, PCMCIA_BOARD_REG);
au_sync_delay(500);
return PCMCIA_NUM_SOCKS;
#endif
}
static int pb1x00_pcmcia_shutdown(void)
{
#ifdef CONFIG_MIPS_PB1000
u16 pcr;
pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
@ -96,14 +76,6 @@ static int pb1x00_pcmcia_shutdown(void)
au_writel(pcr, PB1000_PCR);
au_sync_delay(20);
return 0;
#else
u16 pcr;
pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
au_writew(pcr, PCMCIA_BOARD_REG);
au_sync_delay(2);
return 0;
#endif
}
static int
@ -112,21 +84,11 @@ pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
u32 inserted0, inserted1;
u16 vs0, vs1;
#ifdef CONFIG_MIPS_PB1000
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;
#else
vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
#ifdef CONFIG_MIPS_PB1500
inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
#else /* Pb1100 */
inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
#endif
inserted1 = 0;
#endif
state->ready = 0;
state->vs_Xv = 0;
@ -203,7 +165,6 @@ pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
if(configure->sock > PCMCIA_MAX_SOCK) return -1;
#ifdef CONFIG_MIPS_PB1000
pcr = au_readl(PB1000_PCR);
if (configure->sock == 0) {
@ -323,84 +284,6 @@ pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
au_writel(pcr, PB1000_PCR);
au_sync_delay(300);
#else
pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
configure->vcc, configure->vpp, pcr, configure->reset);
switch(configure->vcc){
case 0: /* Vcc 0 */
pcr |= SET_VCC_VPP(0,0);
break;
case 50: /* Vcc 5V */
switch(configure->vpp) {
case 0:
pcr |= SET_VCC_VPP(2,0);
break;
case 50:
pcr |= SET_VCC_VPP(2,1);
break;
case 12:
pcr |= SET_VCC_VPP(2,2);
break;
case 33:
default:
pcr |= SET_VCC_VPP(0,0);
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(1,0);
break;
case 12:
pcr |= SET_VCC_VPP(1,2);
break;
case 33:
pcr |= SET_VCC_VPP(1,1);
break;
case 50:
default:
pcr |= SET_VCC_VPP(0,0);
printk("%s: bad Vcc/Vpp (%d:%d)\n",
__func__,
configure->vcc,
configure->vpp);
break;
}
break;
default: /* what's this ? */
pcr |= SET_VCC_VPP(0,0);
printk(KERN_ERR "%s: bad Vcc %d\n",
__func__, configure->vcc);
break;
}
au_writew(pcr, PCMCIA_BOARD_REG);
au_sync_delay(300);
if (!configure->reset) {
pcr |= PC_DRV_EN;
au_writew(pcr, PCMCIA_BOARD_REG);
au_sync_delay(100);
pcr |= PC_DEASSERT_RST;
au_writew(pcr, PCMCIA_BOARD_REG);
au_sync_delay(100);
}
else {
pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
au_writew(pcr, PCMCIA_BOARD_REG);
au_sync_delay(100);
}
#endif
return 0;
}

630
drivers/pcmcia/db1xxx_ss.c 100644
View File

@ -0,0 +1,630 @@
/*
* PCMCIA socket code for the Alchemy Db1xxx/Pb1xxx boards.
*
* Copyright (c) 2009 Manuel Lauss <manuel.lauss@gmail.com>
*
*/
/* This is a fairly generic PCMCIA socket driver suitable for the
* following Alchemy Development boards:
* Db1000, Db/Pb1500, Db/Pb1100, Db/Pb1550, Db/Pb1200.
*
* The Db1000 is used as a reference: Per-socket card-, carddetect- and
* statuschange IRQs connected to SoC GPIOs, control and status register
* bits arranged in per-socket groups in an external PLD. All boards
* listed here use this layout, including bit positions and meanings.
* Of course there are exceptions in later boards:
*
* - Pb1100/Pb1500: single socket only; voltage key bits VS are
* at STATUS[5:4] (instead of STATUS[1:0]).
* - Au1200-based: additional card-eject irqs, irqs not gpios!
*/
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/resource.h>
#include <linux/spinlock.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-db1x00/bcsr.h>
#define MEM_MAP_SIZE 0x400000
#define IO_MAP_SIZE 0x1000
struct db1x_pcmcia_sock {
struct pcmcia_socket socket;
int nr; /* socket number */
void *virt_io;
/* the "pseudo" addresses of the PCMCIA space. */
unsigned long phys_io;
unsigned long phys_attr;
unsigned long phys_mem;
/* previous flags for set_socket() */
unsigned int old_flags;
/* interrupt sources: linux irq numbers! */
int insert_irq; /* default carddetect irq */
int stschg_irq; /* card-status-change irq */
int card_irq; /* card irq */
int eject_irq; /* db1200/pb1200 have these */
#define BOARD_TYPE_DEFAULT 0 /* most boards */
#define BOARD_TYPE_DB1200 1 /* IRQs aren't gpios */
#define BOARD_TYPE_PB1100 2 /* VS bits slightly different */
int board_type;
};
#define to_db1x_socket(x) container_of(x, struct db1x_pcmcia_sock, socket)
/* DB/PB1200: check CPLD SIGSTATUS register bit 10/12 */
static int db1200_card_inserted(struct db1x_pcmcia_sock *sock)
{
unsigned short sigstat;
sigstat = bcsr_read(BCSR_SIGSTAT);
return sigstat & 1 << (8 + 2 * sock->nr);
}
/* carddetect gpio: low-active */
static int db1000_card_inserted(struct db1x_pcmcia_sock *sock)
{
return !gpio_get_value(irq_to_gpio(sock->insert_irq));
}
static int db1x_card_inserted(struct db1x_pcmcia_sock *sock)
{
switch (sock->board_type) {
case BOARD_TYPE_DB1200:
return db1200_card_inserted(sock);
default:
return db1000_card_inserted(sock);
}
}
/* STSCHG tends to bounce heavily when cards are inserted/ejected.
* To avoid this, the interrupt is normally disabled and only enabled
* after reset to a card has been de-asserted.
*/
static inline void set_stschg(struct db1x_pcmcia_sock *sock, int en)
{
if (sock->stschg_irq != -1) {
if (en)
enable_irq(sock->stschg_irq);
else
disable_irq(sock->stschg_irq);
}
}
static irqreturn_t db1000_pcmcia_cdirq(int irq, void *data)
{
struct db1x_pcmcia_sock *sock = data;
pcmcia_parse_events(&sock->socket, SS_DETECT);
return IRQ_HANDLED;
}
static irqreturn_t db1000_pcmcia_stschgirq(int irq, void *data)
{
struct db1x_pcmcia_sock *sock = data;
pcmcia_parse_events(&sock->socket, SS_STSCHG);
return IRQ_HANDLED;
}
static irqreturn_t db1200_pcmcia_cdirq(int irq, void *data)
{
struct db1x_pcmcia_sock *sock = data;
/* Db/Pb1200 have separate per-socket insertion and ejection
* interrupts which stay asserted as long as the card is
* inserted/missing. The one which caused us to be called
* needs to be disabled and the other one enabled.
*/
if (irq == sock->insert_irq) {
disable_irq_nosync(sock->insert_irq);
enable_irq(sock->eject_irq);
} else {
disable_irq_nosync(sock->eject_irq);
enable_irq(sock->insert_irq);
}
pcmcia_parse_events(&sock->socket, SS_DETECT);
return IRQ_HANDLED;
}
static int db1x_pcmcia_setup_irqs(struct db1x_pcmcia_sock *sock)
{
int ret;
unsigned long flags;
if (sock->stschg_irq != -1) {
ret = request_irq(sock->stschg_irq, db1000_pcmcia_stschgirq,
0, "pcmcia_stschg", sock);
if (ret)
return ret;
}
/* Db/Pb1200 have separate per-socket insertion and ejection
* interrupts, which should show edge behaviour but don't.
* So interrupts are disabled until both insertion and
* ejection handler have been registered and the currently
* active one disabled.
*/
if (sock->board_type == BOARD_TYPE_DB1200) {
local_irq_save(flags);
ret = request_irq(sock->insert_irq, db1200_pcmcia_cdirq,
IRQF_DISABLED, "pcmcia_insert", sock);
if (ret)
goto out1;
ret = request_irq(sock->eject_irq, db1200_pcmcia_cdirq,
IRQF_DISABLED, "pcmcia_eject", sock);
if (ret) {
free_irq(sock->insert_irq, sock);
local_irq_restore(flags);
goto out1;
}
/* disable the currently active one */
if (db1200_card_inserted(sock))
disable_irq_nosync(sock->insert_irq);
else
disable_irq_nosync(sock->eject_irq);
local_irq_restore(flags);
} else {
/* all other (older) Db1x00 boards use a GPIO to show
* card detection status: use both-edge triggers.
*/
set_irq_type(sock->insert_irq, IRQ_TYPE_EDGE_BOTH);
ret = request_irq(sock->insert_irq, db1000_pcmcia_cdirq,
0, "pcmcia_carddetect", sock);
if (ret)
goto out1;
}
return 0; /* all done */
out1:
if (sock->stschg_irq != -1)
free_irq(sock->stschg_irq, sock);
return ret;
}
static void db1x_pcmcia_free_irqs(struct db1x_pcmcia_sock *sock)
{
if (sock->stschg_irq != -1)
free_irq(sock->stschg_irq, sock);
free_irq(sock->insert_irq, sock);
if (sock->eject_irq != -1)
free_irq(sock->eject_irq, sock);
}
/*
* configure a PCMCIA socket on the Db1x00 series of boards (and
* compatibles).
*
* 2 external registers are involved:
* pcmcia_status (offset 0x04): bits [0:1/2:3]: read card voltage id
* pcmcia_control(offset 0x10):
* bits[0:1] set vcc for card
* bits[2:3] set vpp for card
* bit 4: enable data buffers
* bit 7: reset# for card
* add 8 for second socket.
*/
static int db1x_pcmcia_configure(struct pcmcia_socket *skt,
struct socket_state_t *state)
{
struct db1x_pcmcia_sock *sock = to_db1x_socket(skt);
unsigned short cr_clr, cr_set;
unsigned int changed;
int v, p, ret;
/* card voltage setup */
cr_clr = (0xf << (sock->nr * 8)); /* clear voltage settings */
cr_set = 0;
v = p = ret = 0;
switch (state->Vcc) {
case 50:
++v;
case 33:
++v;
case 0:
break;
default:
printk(KERN_INFO "pcmcia%d unsupported Vcc %d\n",
sock->nr, state->Vcc);
}
switch (state->Vpp) {
case 12:
++p;
case 33:
case 50:
++p;
case 0:
break;
default:
printk(KERN_INFO "pcmcia%d unsupported Vpp %d\n",
sock->nr, state->Vpp);
}
/* sanity check: Vpp must be 0, 12, or Vcc */
if (((state->Vcc == 33) && (state->Vpp == 50)) ||
((state->Vcc == 50) && (state->Vpp == 33))) {
printk(KERN_INFO "pcmcia%d bad Vcc/Vpp combo (%d %d)\n",
sock->nr, state->Vcc, state->Vpp);
v = p = 0;
ret = -EINVAL;
}
/* create new voltage code */
cr_set |= ((v << 2) | p) << (sock->nr * 8);
changed = state->flags ^ sock->old_flags;
if (changed & SS_RESET) {
if (state->flags & SS_RESET) {
set_stschg(sock, 0);
/* assert reset, disable io buffers */
cr_clr |= (1 << (7 + (sock->nr * 8)));
cr_clr |= (1 << (4 + (sock->nr * 8)));
} else {
/* de-assert reset, enable io buffers */
cr_set |= 1 << (7 + (sock->nr * 8));
cr_set |= 1 << (4 + (sock->nr * 8));
}
}
/* update PCMCIA configuration */
bcsr_mod(BCSR_PCMCIA, cr_clr, cr_set);
sock->old_flags = state->flags;
/* reset was taken away: give card time to initialize properly */
if ((changed & SS_RESET) && !(state->flags & SS_RESET)) {
msleep(500);
set_stschg(sock, 1);
}
return ret;
}
/* VCC bits at [3:2]/[11:10] */
#define GET_VCC(cr, socknr) \
((((cr) >> 2) >> ((socknr) * 8)) & 3)
/* VS bits at [0:1]/[3:2] */
#define GET_VS(sr, socknr) \
(((sr) >> (2 * (socknr))) & 3)
/* reset bits at [7]/[15] */
#define GET_RESET(cr, socknr) \
((cr) & (1 << (7 + (8 * (socknr)))))
static int db1x_pcmcia_get_status(struct pcmcia_socket *skt,
unsigned int *value)
{
struct db1x_pcmcia_sock *sock = to_db1x_socket(skt);
unsigned short cr, sr;
unsigned int status;
status = db1x_card_inserted(sock) ? SS_DETECT : 0;
cr = bcsr_read(BCSR_PCMCIA);
sr = bcsr_read(BCSR_STATUS);
/* PB1100/PB1500: voltage key bits are at [5:4] */
if (sock->board_type == BOARD_TYPE_PB1100)
sr >>= 4;
/* determine card type */
switch (GET_VS(sr, sock->nr)) {
case 0:
case 2:
status |= SS_3VCARD; /* 3V card */
case 3:
break; /* 5V card: set nothing */
default:
status |= SS_XVCARD; /* treated as unsupported in core */
}
/* if Vcc is not zero, we have applied power to a card */
status |= GET_VCC(cr, sock->nr) ? SS_POWERON : 0;
/* reset de-asserted? then we're ready */
status |= (GET_RESET(cr, sock->nr)) ? SS_READY : SS_RESET;
*value = status;
return 0;
}
static int db1x_pcmcia_sock_init(struct pcmcia_socket *skt)
{
return 0;
}
static int db1x_pcmcia_sock_suspend(struct pcmcia_socket *skt)
{
return 0;
}
static int au1x00_pcmcia_set_io_map(struct pcmcia_socket *skt,
struct pccard_io_map *map)
{
struct db1x_pcmcia_sock *sock = to_db1x_socket(skt);
map->start = (u32)sock->virt_io;
map->stop = map->start + IO_MAP_SIZE;
return 0;
}
static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *skt,
struct pccard_mem_map *map)
{
struct db1x_pcmcia_sock *sock = to_db1x_socket(skt);
if (map->flags & MAP_ATTRIB)
map->static_start = sock->phys_attr + map->card_start;
else
map->static_start = sock->phys_mem + map->card_start;
return 0;
}
static struct pccard_operations db1x_pcmcia_operations = {
.init = db1x_pcmcia_sock_init,
.suspend = db1x_pcmcia_sock_suspend,
.get_status = db1x_pcmcia_get_status,
.set_socket = db1x_pcmcia_configure,
.set_io_map = au1x00_pcmcia_set_io_map,
.set_mem_map = au1x00_pcmcia_set_mem_map,
};
static int __devinit db1x_pcmcia_socket_probe(struct platform_device *pdev)
{
struct db1x_pcmcia_sock *sock;
struct resource *r;
phys_t physio;
int ret, bid;
sock = kzalloc(sizeof(struct db1x_pcmcia_sock), GFP_KERNEL);
if (!sock)
return -ENOMEM;
sock->nr = pdev->id;
bid = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
switch (bid) {
case BCSR_WHOAMI_PB1500:
case BCSR_WHOAMI_PB1500R2:
case BCSR_WHOAMI_PB1100:
sock->board_type = BOARD_TYPE_PB1100;
break;
case BCSR_WHOAMI_DB1000 ... BCSR_WHOAMI_PB1550_SDR:
sock->board_type = BOARD_TYPE_DEFAULT;
break;
case BCSR_WHOAMI_PB1200 ... BCSR_WHOAMI_DB1200:
sock->board_type = BOARD_TYPE_DB1200;
break;
default:
printk(KERN_INFO "db1xxx-ss: unknown board %d!\n", bid);
ret = -ENODEV;
goto out0;
};
/*
* gather resources necessary and optional nice-to-haves to
* operate a socket:
* This includes IRQs for Carddetection/ejection, the card
* itself and optional status change detection.
* Also, the memory areas covered by a socket. For these
* we require the 32bit "pseudo" addresses (see the au1000.h
* header for more information).
*/
/* card: irq assigned to the card itself. */
r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "card");
sock->card_irq = r ? r->start : 0;
/* insert: irq which triggers on card insertion/ejection */
r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "insert");
sock->insert_irq = r ? r->start : -1;
/* stschg: irq which trigger on card status change (optional) */
r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "stschg");
sock->stschg_irq = r ? r->start : -1;
/* eject: irq which triggers on ejection (DB1200/PB1200 only) */
r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "eject");
sock->eject_irq = r ? r->start : -1;
ret = -ENODEV;
/*
* pseudo-attr: The 32bit address of the PCMCIA attribute space
* for this socket (usually the 36bit address shifted 4 to the
* right).
*/
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pseudo-attr");
if (!r) {
printk(KERN_ERR "pcmcia%d has no 'pseudo-attr' resource!\n",
sock->nr);
goto out0;
}
sock->phys_attr = r->start;
/*
* pseudo-mem: The 32bit address of the PCMCIA memory space for
* this socket (usually the 36bit address shifted 4 to the right)
*/
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pseudo-mem");
if (!r) {
printk(KERN_ERR "pcmcia%d has no 'pseudo-mem' resource!\n",
sock->nr);
goto out0;
}
sock->phys_mem = r->start;
/*
* pseudo-io: The 32bit address of the PCMCIA IO space for this
* socket (usually the 36bit address shifted 4 to the right).
*/
r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pseudo-io");
if (!r) {
printk(KERN_ERR "pcmcia%d has no 'pseudo-io' resource!\n",
sock->nr);
goto out0;
}
sock->phys_io = r->start;
/* IO: we must remap the full 36bit address (for reference see
* alchemy/common/setup.c::__fixup_bigphys_addr())
*/
physio = ((phys_t)sock->phys_io) << 4;
/*
* PCMCIA client drivers use the inb/outb macros to access
* the IO registers. Since mips_io_port_base is added
* to the access address of the mips implementation of
* inb/outb, we need to subtract it here because we want
* to access the I/O or MEM address directly, without
* going through this "mips_io_port_base" mechanism.
*/
sock->virt_io = (void *)(ioremap(physio, IO_MAP_SIZE) -
mips_io_port_base);
if (!sock->virt_io) {
printk(KERN_ERR "pcmcia%d: cannot remap IO area\n",
sock->nr);
ret = -ENOMEM;
goto out0;
}
sock->socket.ops = &db1x_pcmcia_operations;
sock->socket.owner = THIS_MODULE;
sock->socket.pci_irq = sock->card_irq;
sock->socket.features = SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
sock->socket.map_size = MEM_MAP_SIZE;
sock->socket.io_offset = (unsigned long)sock->virt_io;
sock->socket.dev.parent = &pdev->dev;
sock->socket.resource_ops = &pccard_static_ops;
platform_set_drvdata(pdev, sock);
ret = db1x_pcmcia_setup_irqs(sock);
if (ret) {
printk(KERN_ERR "pcmcia%d cannot setup interrupts\n",
sock->nr);
goto out1;
}
set_stschg(sock, 0);
ret = pcmcia_register_socket(&sock->socket);
if (ret) {
printk(KERN_ERR "pcmcia%d failed to register\n", sock->nr);
goto out2;
}
printk(KERN_INFO "Alchemy Db/Pb1xxx pcmcia%d @ io/attr/mem %08lx"
"(%p) %08lx %08lx card/insert/stschg/eject irqs @ %d "
"%d %d %d\n", sock->nr, sock->phys_io, sock->virt_io,
sock->phys_attr, sock->phys_mem, sock->card_irq,
sock->insert_irq, sock->stschg_irq, sock->eject_irq);
return 0;
out2:
db1x_pcmcia_free_irqs(sock);
out1:
iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
out0:
kfree(sock);
return ret;
}
static int __devexit db1x_pcmcia_socket_remove(struct platform_device *pdev)
{
struct db1x_pcmcia_sock *sock = platform_get_drvdata(pdev);
db1x_pcmcia_free_irqs(sock);
pcmcia_unregister_socket(&sock->socket);
iounmap((void *)(sock->virt_io + (u32)mips_io_port_base));
kfree(sock);
return 0;
}
#ifdef CONFIG_PM
static int db1x_pcmcia_suspend(struct device *dev)
{
return pcmcia_socket_dev_suspend(dev);
}
static int db1x_pcmcia_resume(struct device *dev)
{
return pcmcia_socket_dev_resume(dev);
}
static struct dev_pm_ops db1x_pcmcia_pmops = {
.resume = db1x_pcmcia_resume,
.suspend = db1x_pcmcia_suspend,
.thaw = db1x_pcmcia_resume,
.freeze = db1x_pcmcia_suspend,
};
#define DB1XXX_SS_PMOPS &db1x_pcmcia_pmops
#else
#define DB1XXX_SS_PMOPS NULL
#endif
static struct platform_driver db1x_pcmcia_socket_driver = {
.driver = {
.name = "db1xxx_pcmcia",
.owner = THIS_MODULE,
.pm = DB1XXX_SS_PMOPS
},
.probe = db1x_pcmcia_socket_probe,
.remove = __devexit_p(db1x_pcmcia_socket_remove),
};
int __init db1x_pcmcia_socket_load(void)
{
return platform_driver_register(&db1x_pcmcia_socket_driver);
}
void __exit db1x_pcmcia_socket_unload(void)
{
platform_driver_unregister(&db1x_pcmcia_socket_driver);
}
module_init(db1x_pcmcia_socket_load);
module_exit(db1x_pcmcia_socket_unload);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCMCIA Socket Services for Alchemy Db/Pb1x00 boards");
MODULE_AUTHOR("Manuel Lauss");