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ssb: Make the GPIO API reentrancy safe.

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SVN-Revision: 10496
This commit is contained in:
Michael Büsch 2008-02-19 15:22:17 +00:00
parent 66dec6d8a1
commit faa14263f5
4 changed files with 265 additions and 72 deletions
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29
package/broadcom-diag/src/gpio.h
View file

@ -3,54 +3,39 @@
#include <linux/interrupt.h>
#ifndef BCMDRIVER
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_driver_chipcommon.h>
#include <linux/ssb/ssb_driver_extif.h>
#include <linux/ssb/ssb_embedded.h>
extern struct ssb_bus ssb;
#define gpio_op(op, param...) \
do { \
if (ssb.chipco.dev) \
return ssb_chipco_gpio_##op(&ssb.chipco, param); \
else if (ssb.extif.dev) \
return ssb_extif_gpio_##op(&ssb.extif, param); \
else \
return 0; \
} while (0);
static inline u32 gpio_in(void)
{
gpio_op(in, ~0);
return ssb_gpio_in(&ssb, ~0);
}
static inline u32 gpio_out(u32 mask, u32 value)
{
gpio_op(out, mask, value);
return ssb_gpio_out(&ssb, mask, value);
}
static inline u32 gpio_outen(u32 mask, u32 value)
{
gpio_op(outen, mask, value);
return ssb_gpio_outen(&ssb, mask, value);
}
static inline u32 gpio_control(u32 mask, u32 value)
{
if (ssb.chipco.dev)
return ssb_chipco_gpio_control(&ssb.chipco, mask, value);
else
return 0;
return ssb_gpio_control(&ssb, mask, value);
}
static inline u32 gpio_intmask(u32 mask, u32 value)
{
gpio_op(intmask, mask, value);
return ssb_gpio_intmask(&ssb, mask, value);
}
static inline u32 gpio_intpolarity(u32 mask, u32 value)
{
gpio_op(polarity, mask, value);
return ssb_gpio_polarity(&ssb, mask, value);
}
static inline u32 __ssb_write32_masked(struct ssb_device *dev, u16 offset,

29
package/switch/src/gpio-bcm947xx.h
View file

@ -3,54 +3,39 @@
#include <linux/interrupt.h>
#ifndef BCMDRIVER
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_driver_chipcommon.h>
#include <linux/ssb/ssb_driver_extif.h>
#include <linux/ssb/ssb_embedded.h>
extern struct ssb_bus ssb;
#define gpio_op(op, param...) \
do { \
if (ssb.chipco.dev) \
return ssb_chipco_gpio_##op(&ssb.chipco, param); \
else if (ssb.extif.dev) \
return ssb_extif_gpio_##op(&ssb.extif, param); \
else \
return 0; \
} while (0);
static inline u32 gpio_in(void)
{
gpio_op(in, ~0);
return ssb_gpio_in(&ssb, ~0);
}
static inline u32 gpio_out(u32 mask, u32 value)
{
gpio_op(out, mask, value);
return ssb_gpio_out(&ssb, mask, value);
}
static inline u32 gpio_outen(u32 mask, u32 value)
{
gpio_op(outen, mask, value);
return ssb_gpio_outen(&ssb, mask, value);
}
static inline u32 gpio_control(u32 mask, u32 value)
{
if (ssb.chipco.dev)
return ssb_chipco_gpio_control(&ssb.chipco, mask, value);
else
return 0;
return ssb_gpio_control(&ssb, mask, value);
}
static inline u32 gpio_intmask(u32 mask, u32 value)
{
gpio_op(intmask, mask, value);
return ssb_gpio_intmask(&ssb, mask, value);
}
static inline u32 gpio_intpolarity(u32 mask, u32 value)
{
gpio_op(polarity, mask, value);
return ssb_gpio_polarity(&ssb, mask, value);
}
#else

32
target/linux/brcm47xx/files/include/asm-mips/mach-bcm947xx/gpio.h
View file

@ -1,9 +1,7 @@
#ifndef __BCM947XX_GPIO_H
#define __BCM947XX_GPIO_H
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_driver_chipcommon.h>
#include <linux/ssb/ssb_driver_extif.h>
#include <linux/ssb/ssb_embedded.h>
extern struct ssb_bus ssb;
@ -18,24 +16,13 @@ static inline void gpio_free(unsigned gpio)
static inline int gpio_direction_input(unsigned gpio)
{
if (ssb.chipco.dev)
ssb_chipco_gpio_outen(&ssb.chipco, 1 << gpio, 0);
else if (ssb.extif.dev)
ssb_extif_gpio_outen(&ssb.extif, 1 << gpio, 0);
else
return -EINVAL;
ssb_gpio_outen(&ssb, 1 << gpio, 0);
return 0;
}
static inline int gpio_direction_output(unsigned gpio, int value)
{
if (ssb.chipco.dev)
ssb_chipco_gpio_outen(&ssb.chipco, 1 << gpio, value << gpio);
else if (ssb.extif.dev)
ssb_extif_gpio_outen(&ssb.extif, 1 << gpio, value << gpio);
else
return -EINVAL;
ssb_gpio_outen(&ssb, 1 << gpio, value << gpio);
return 0;
}
@ -61,21 +48,12 @@ static inline int irq_to_gpio(unsigned gpio)
static inline int gpio_get_value(unsigned gpio)
{
if (ssb.chipco.dev)
return ssb_chipco_gpio_in(&ssb.chipco, 1 << gpio) ? 1 : 0;
else if (ssb.extif.dev)
return ssb_extif_gpio_in(&ssb.extif, 1 << gpio) ? 1 : 0;
else
return 0;
return !!ssb_gpio_in(&ssb, 1 << gpio);
}
static inline int gpio_set_value(unsigned gpio, int value)
{
if (ssb.chipco.dev)
ssb_chipco_gpio_out(&ssb.chipco, 1 << gpio, (value ? 1 << gpio : 0));
else if (ssb.extif.dev)
ssb_extif_gpio_out(&ssb.extif, 1 << gpio, (value ? 1 << gpio : 0));
ssb_gpio_out(&ssb, 1 << gpio, (value ? 1 << gpio : 0));
return 0;
}

245
target/linux/brcm47xx/patches-2.6.23/621-ssb-common-gpio-api.patch Normal file
View file

@ -0,0 +1,245 @@
Index: linux-2.6.23.16/drivers/ssb/driver_chipcommon.c
===================================================================
--- linux-2.6.23.16.orig/drivers/ssb/driver_chipcommon.c 2008-02-19 15:50:42.000000000 +0100
+++ linux-2.6.23.16/drivers/ssb/driver_chipcommon.c 2008-02-19 15:50:44.000000000 +0100
@@ -361,37 +361,31 @@ u32 ssb_chipco_gpio_in(struct ssb_chipco
{
return chipco_read32(cc, SSB_CHIPCO_GPIOIN) & mask;
}
-EXPORT_SYMBOL(ssb_chipco_gpio_in);
u32 ssb_chipco_gpio_out(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
return chipco_write32_masked(cc, SSB_CHIPCO_GPIOOUT, mask, value);
}
-EXPORT_SYMBOL(ssb_chipco_gpio_out);
u32 ssb_chipco_gpio_outen(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
return chipco_write32_masked(cc, SSB_CHIPCO_GPIOOUTEN, mask, value);
}
-EXPORT_SYMBOL(ssb_chipco_gpio_outen);
u32 ssb_chipco_gpio_control(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
return chipco_write32_masked(cc, SSB_CHIPCO_GPIOCTL, mask, value);
}
-EXPORT_SYMBOL(ssb_chipco_gpio_control);
u32 ssb_chipco_gpio_intmask(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
return chipco_write32_masked(cc, SSB_CHIPCO_GPIOIRQ, mask, value);
}
-EXPORT_SYMBOL(ssb_chipco_gpio_intmask);
u32 ssb_chipco_gpio_polarity(struct ssb_chipcommon *cc, u32 mask, u32 value)
{
return chipco_write32_masked(cc, SSB_CHIPCO_GPIOPOL, mask, value);
}
-EXPORT_SYMBOL(ssb_chipco_gpio_polarity);
#ifdef CONFIG_SSB_SERIAL
int ssb_chipco_serial_init(struct ssb_chipcommon *cc,
Index: linux-2.6.23.16/drivers/ssb/driver_extif.c
===================================================================
--- linux-2.6.23.16.orig/drivers/ssb/driver_extif.c 2008-02-19 15:50:42.000000000 +0100
+++ linux-2.6.23.16/drivers/ssb/driver_extif.c 2008-02-19 15:50:44.000000000 +0100
@@ -122,30 +122,25 @@ u32 ssb_extif_gpio_in(struct ssb_extif *
{
return extif_read32(extif, SSB_EXTIF_GPIO_IN) & mask;
}
-EXPORT_SYMBOL(ssb_extif_gpio_in);
u32 ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask, u32 value)
{
return extif_write32_masked(extif, SSB_EXTIF_GPIO_OUT(0),
mask, value);
}
-EXPORT_SYMBOL(ssb_extif_gpio_out);
u32 ssb_extif_gpio_outen(struct ssb_extif *extif, u32 mask, u32 value)
{
return extif_write32_masked(extif, SSB_EXTIF_GPIO_OUTEN(0),
mask, value);
}
-EXPORT_SYMBOL(ssb_extif_gpio_outen);
u32 ssb_extif_gpio_polarity(struct ssb_extif *extif, u32 mask, u32 value)
{
return extif_write32_masked(extif, SSB_EXTIF_GPIO_INTPOL, mask, value);
}
-EXPORT_SYMBOL(ssb_extif_gpio_polarity);
u32 ssb_extif_gpio_intmask(struct ssb_extif *extif, u32 mask, u32 value)
{
return extif_write32_masked(extif, SSB_EXTIF_GPIO_INTMASK, mask, value);
}
-EXPORT_SYMBOL(ssb_extif_gpio_intmask);
Index: linux-2.6.23.16/drivers/ssb/embedded.c
===================================================================
--- linux-2.6.23.16.orig/drivers/ssb/embedded.c 2008-02-19 15:50:42.000000000 +0100
+++ linux-2.6.23.16/drivers/ssb/embedded.c 2008-02-19 15:51:01.000000000 +0100
@@ -11,6 +11,8 @@
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
+#include "ssb_private.h"
+
int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks)
{
@@ -24,3 +26,107 @@ int ssb_watchdog_timer_set(struct ssb_bu
}
return -ENODEV;
}
+
+u32 ssb_gpio_in(struct ssb_bus *bus, u32 mask)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&bus->gpio_lock, flags);
+ if (ssb_chipco_available(&bus->chipco))
+ res = ssb_chipco_gpio_in(&bus->chipco, mask);
+ else if (ssb_extif_available(&bus->extif))
+ res = ssb_extif_gpio_in(&bus->extif, mask);
+ else
+ SSB_WARN_ON(1);
+ spin_unlock_irqrestore(&bus->gpio_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(ssb_gpio_in);
+
+u32 ssb_gpio_out(struct ssb_bus *bus, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&bus->gpio_lock, flags);
+ if (ssb_chipco_available(&bus->chipco))
+ res = ssb_chipco_gpio_out(&bus->chipco, mask, value);
+ else if (ssb_extif_available(&bus->extif))
+ res = ssb_extif_gpio_out(&bus->extif, mask, value);
+ else
+ SSB_WARN_ON(1);
+ spin_unlock_irqrestore(&bus->gpio_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(ssb_gpio_out);
+
+u32 ssb_gpio_outen(struct ssb_bus *bus, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&bus->gpio_lock, flags);
+ if (ssb_chipco_available(&bus->chipco))
+ res = ssb_chipco_gpio_outen(&bus->chipco, mask, value);
+ else if (ssb_extif_available(&bus->extif))
+ res = ssb_extif_gpio_outen(&bus->extif, mask, value);
+ else
+ SSB_WARN_ON(1);
+ spin_unlock_irqrestore(&bus->gpio_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(ssb_gpio_outen);
+
+u32 ssb_gpio_control(struct ssb_bus *bus, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&bus->gpio_lock, flags);
+ if (ssb_chipco_available(&bus->chipco))
+ res = ssb_chipco_gpio_control(&bus->chipco, mask, value);
+ spin_unlock_irqrestore(&bus->gpio_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(ssb_gpio_control);
+
+u32 ssb_gpio_intmask(struct ssb_bus *bus, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&bus->gpio_lock, flags);
+ if (ssb_chipco_available(&bus->chipco))
+ res = ssb_chipco_gpio_intmask(&bus->chipco, mask, value);
+ else if (ssb_extif_available(&bus->extif))
+ res = ssb_extif_gpio_intmask(&bus->extif, mask, value);
+ else
+ SSB_WARN_ON(1);
+ spin_unlock_irqrestore(&bus->gpio_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(ssb_gpio_intmask);
+
+u32 ssb_gpio_polarity(struct ssb_bus *bus, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res = 0;
+
+ spin_lock_irqsave(&bus->gpio_lock, flags);
+ if (ssb_chipco_available(&bus->chipco))
+ res = ssb_chipco_gpio_polarity(&bus->chipco, mask, value);
+ else if (ssb_extif_available(&bus->extif))
+ res = ssb_extif_gpio_polarity(&bus->extif, mask, value);
+ else
+ SSB_WARN_ON(1);
+ spin_unlock_irqrestore(&bus->gpio_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(ssb_gpio_polarity);
Index: linux-2.6.23.16/include/linux/ssb/ssb.h
===================================================================
--- linux-2.6.23.16.orig/include/linux/ssb/ssb.h 2008-02-19 15:50:42.000000000 +0100
+++ linux-2.6.23.16/include/linux/ssb/ssb.h 2008-02-19 15:50:44.000000000 +0100
@@ -283,6 +283,11 @@ struct ssb_bus {
/* Contents of the SPROM. */
struct ssb_sprom sprom;
+#ifdef CONFIG_SSB_EMBEDDED
+ /* Lock for GPIO register access. */
+ spinlock_t gpio_lock;
+#endif /* EMBEDDED */
+
/* Internal-only stuff follows. Do not touch. */
struct list_head list;
#ifdef CONFIG_SSB_DEBUG
Index: linux-2.6.23.16/include/linux/ssb/ssb_embedded.h
===================================================================
--- linux-2.6.23.16.orig/include/linux/ssb/ssb_embedded.h 2008-02-19 15:50:42.000000000 +0100
+++ linux-2.6.23.16/include/linux/ssb/ssb_embedded.h 2008-02-19 15:50:44.000000000 +0100
@@ -7,4 +7,12 @@
extern int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks);
+/* Generic GPIO API */
+u32 ssb_gpio_in(struct ssb_bus *bus, u32 mask);
+u32 ssb_gpio_out(struct ssb_bus *bus, u32 mask, u32 value);
+u32 ssb_gpio_outen(struct ssb_bus *bus, u32 mask, u32 value);
+u32 ssb_gpio_control(struct ssb_bus *bus, u32 mask, u32 value);
+u32 ssb_gpio_intmask(struct ssb_bus *bus, u32 mask, u32 value);
+u32 ssb_gpio_polarity(struct ssb_bus *bus, u32 mask, u32 value);
+
#endif /* LINUX_SSB_EMBEDDED_H_ */
Index: linux-2.6.23.16/drivers/ssb/main.c
===================================================================
--- linux-2.6.23.16.orig/drivers/ssb/main.c 2008-02-19 15:50:42.000000000 +0100
+++ linux-2.6.23.16/drivers/ssb/main.c 2008-02-19 15:50:44.000000000 +0100
@@ -571,6 +571,9 @@ static int ssb_bus_register(struct ssb_b
spin_lock_init(&bus->bar_lock);
INIT_LIST_HEAD(&bus->list);
+#ifdef CONFIG_SSB_EMBEDDED
+ spin_lock_init(&bus->gpio_lock);
+#endif
/* Powerup the bus */
err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);