linux/drivers/pcmcia/sa1111_generic.c
Russell King ae99ddbc97 ARM: sa1111: add platform enable/disable functions
Add platform hooks to be called when individual sa1111 devices are
enabled and disabled.  This will allow us to move some platform
specifics out of the individual drivers.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-02-09 15:34:50 +00:00

249 lines
6.1 KiB
C

/*
* linux/drivers/pcmcia/sa1111_generic.c
*
* We implement the generic parts of a SA1111 PCMCIA driver. This
* basically means we handle everything except controlling the
* power. Power is machine specific...
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <pcmcia/ss.h>
#include <mach/hardware.h>
#include <asm/hardware/sa1111.h>
#include <asm/irq.h>
#include "sa1111_generic.h"
#define IDX_IRQ_S0_READY_NINT (0)
#define IDX_IRQ_S0_CD_VALID (1)
#define IDX_IRQ_S0_BVD1_STSCHG (2)
#define IDX_IRQ_S1_READY_NINT (3)
#define IDX_IRQ_S1_CD_VALID (4)
#define IDX_IRQ_S1_BVD1_STSCHG (5)
static struct pcmcia_irqs irqs[] = {
{ 0, NO_IRQ, "SA1111 PCMCIA card detect" },
{ 0, NO_IRQ, "SA1111 PCMCIA BVD1" },
{ 1, NO_IRQ, "SA1111 CF card detect" },
{ 1, NO_IRQ, "SA1111 CF BVD1" },
};
static int sa1111_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static void sa1111_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
{
struct sa1111_pcmcia_socket *s = to_skt(skt);
unsigned long status = sa1111_readl(s->dev->mapbase + SA1111_PCSR);
switch (skt->nr) {
case 0:
state->detect = status & PCSR_S0_DETECT ? 0 : 1;
state->ready = status & PCSR_S0_READY ? 1 : 0;
state->bvd1 = status & PCSR_S0_BVD1 ? 1 : 0;
state->bvd2 = status & PCSR_S0_BVD2 ? 1 : 0;
state->wrprot = status & PCSR_S0_WP ? 1 : 0;
state->vs_3v = status & PCSR_S0_VS1 ? 0 : 1;
state->vs_Xv = status & PCSR_S0_VS2 ? 0 : 1;
break;
case 1:
state->detect = status & PCSR_S1_DETECT ? 0 : 1;
state->ready = status & PCSR_S1_READY ? 1 : 0;
state->bvd1 = status & PCSR_S1_BVD1 ? 1 : 0;
state->bvd2 = status & PCSR_S1_BVD2 ? 1 : 0;
state->wrprot = status & PCSR_S1_WP ? 1 : 0;
state->vs_3v = status & PCSR_S1_VS1 ? 0 : 1;
state->vs_Xv = status & PCSR_S1_VS2 ? 0 : 1;
break;
}
}
int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
{
struct sa1111_pcmcia_socket *s = to_skt(skt);
unsigned int pccr_skt_mask, pccr_set_mask, val;
unsigned long flags;
switch (skt->nr) {
case 0:
pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
break;
case 1:
pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
break;
default:
return -1;
}
pccr_set_mask = 0;
if (state->Vcc != 0)
pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
if (state->Vcc == 50)
pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
if (state->flags & SS_RESET)
pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
if (state->flags & SS_OUTPUT_ENA)
pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
local_irq_save(flags);
val = sa1111_readl(s->dev->mapbase + SA1111_PCCR);
val &= ~pccr_skt_mask;
val |= pccr_set_mask & pccr_skt_mask;
sa1111_writel(val, s->dev->mapbase + SA1111_PCCR);
local_irq_restore(flags);
return 0;
}
void sa1111_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
static void sa1111_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
int (*add)(struct soc_pcmcia_socket *))
{
struct sa1111_pcmcia_socket *s;
int i, ret = 0;
ops->hw_init = sa1111_pcmcia_hw_init;
ops->hw_shutdown = sa1111_pcmcia_hw_shutdown;
ops->socket_state = sa1111_pcmcia_socket_state;
ops->socket_suspend = sa1111_pcmcia_socket_suspend;
for (i = 0; i < ops->nr; i++) {
s = kzalloc(sizeof(*s), GFP_KERNEL);
if (!s)
return -ENOMEM;
s->soc.nr = ops->first + i;
s->soc.ops = ops;
s->soc.socket.owner = ops->owner;
s->soc.socket.dev.parent = &dev->dev;
s->soc.socket.pci_irq = s->soc.nr ?
dev->irq[IDX_IRQ_S0_READY_NINT] :
dev->irq[IDX_IRQ_S1_READY_NINT];
s->dev = dev;
ret = add(&s->soc);
if (ret == 0) {
s->next = dev_get_drvdata(&dev->dev);
dev_set_drvdata(&dev->dev, s);
} else
kfree(s);
}
return ret;
}
static int pcmcia_probe(struct sa1111_dev *dev)
{
void __iomem *base;
int ret;
ret = sa1111_enable_device(dev);
if (ret)
return ret;
dev_set_drvdata(&dev->dev, NULL);
if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
sa1111_disable_device(dev);
return -EBUSY;
}
base = dev->mapbase;
/* Initialize PCMCIA IRQs */
irqs[0].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
irqs[1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
irqs[2].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
irqs[3].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
/*
* Initialise the suspend state.
*/
sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
#ifdef CONFIG_SA1100_BADGE4
pcmcia_badge4_init(&dev->dev);
#endif
#ifdef CONFIG_SA1100_JORNADA720
pcmcia_jornada720_init(&dev->dev);
#endif
#ifdef CONFIG_ARCH_LUBBOCK
pcmcia_lubbock_init(dev);
#endif
#ifdef CONFIG_ASSABET_NEPONSET
pcmcia_neponset_init(dev);
#endif
return 0;
}
static int __devexit pcmcia_remove(struct sa1111_dev *dev)
{
struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
dev_set_drvdata(&dev->dev, NULL);
for (; s; s = next) {
next = s->next;
soc_pcmcia_remove_one(&s->soc);
kfree(s);
}
release_mem_region(dev->res.start, 512);
sa1111_disable_device(dev);
return 0;
}
static struct sa1111_driver pcmcia_driver = {
.drv = {
.name = "sa1111-pcmcia",
},
.devid = SA1111_DEVID_PCMCIA,
.probe = pcmcia_probe,
.remove = __devexit_p(pcmcia_remove),
};
static int __init sa1111_drv_pcmcia_init(void)
{
return sa1111_driver_register(&pcmcia_driver);
}
static void __exit sa1111_drv_pcmcia_exit(void)
{
sa1111_driver_unregister(&pcmcia_driver);
}
fs_initcall(sa1111_drv_pcmcia_init);
module_exit(sa1111_drv_pcmcia_exit);
MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
MODULE_LICENSE("GPL");