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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-14 14:27:45 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-14 14:27:45 -0800
commitcebfa85eb86d92bf85d3b041c6b044184517a988 (patch)
treebe0a374556fe335ce96dfdb296c89537750d5868 /drivers/bcma
parentd42b3a2906a10b732ea7d7f849d49be79d242ef0 (diff)
parent241738bd51cb0efe58e6c570223153e970afe3ae (diff)
downloadvexpress-lsk-cebfa85eb86d92bf85d3b041c6b044184517a988.tar.gz
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle: "The MIPS bits for 3.8. This also includes a bunch fixes that were sitting in the linux-mips.org git tree for a long time. This pull request contains updates to several OCTEON drivers and the board support code for BCM47XX, BCM63XX, XLP, XLR, XLS, lantiq, Loongson1B, updates to the SSB bus support, MIPS kexec code and adds support for kdump. When pulling this, there are two expected merge conflicts in include/linux/bcma/bcma_driver_chipcommon.h which are trivial to resolve, just remove the conflict markers and keep both alternatives." * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (90 commits) MIPS: PMC-Sierra Yosemite: Remove support. VIDEO: Newport Fix console crashes MIPS: wrppmc: Fix build of PCI code. MIPS: IP22/IP28: Fix build of EISA code. MIPS: RB532: Fix build of prom code. MIPS: PowerTV: Fix build. MIPS: IP27: Correct fucked grammar in ops-bridge.c MIPS: Highmem: Fix build error if CONFIG_DEBUG_HIGHMEM is disabled MIPS: Fix potencial corruption MIPS: Fix for warning from FPU emulation code MIPS: Handle COP3 Unusable exception as COP1X for FP emulation MIPS: Fix poweroff failure when HOTPLUG_CPU configured. MIPS: MT: Fix build with CONFIG_UIDGID_STRICT_TYPE_CHECKS=y MIPS: Remove unused smvp.h MIPS/EDAC: Improve OCTEON EDAC support. MIPS: OCTEON: Add definitions for OCTEON memory contoller registers. MIPS: OCTEON: Add OCTEON family definitions to octeon-model.h ata: pata_octeon_cf: Use correct byte order for DMA in when built little-endian. MIPS/OCTEON/ata: Convert pata_octeon_cf.c to use device tree. MIPS: Remove usage of CEVT_R4K_LIB config option. ...
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/Kconfig9
-rw-r--r--drivers/bcma/Makefile1
-rw-r--r--drivers/bcma/bcma_private.h10
-rw-r--r--drivers/bcma/driver_chipcommon.c81
-rw-r--r--drivers/bcma/driver_gpio.c98
-rw-r--r--drivers/bcma/main.c5
6 files changed, 199 insertions, 5 deletions
diff --git a/drivers/bcma/Kconfig b/drivers/bcma/Kconfig
index a533af21836..d7b56a88c9f 100644
--- a/drivers/bcma/Kconfig
+++ b/drivers/bcma/Kconfig
@@ -65,6 +65,15 @@ config BCMA_DRIVER_GMAC_CMN
If unsure, say N
+config BCMA_DRIVER_GPIO
+ bool "BCMA GPIO driver"
+ depends on BCMA
+ select GPIOLIB
+ help
+ Driver to provide access to the GPIO pins of the bcma bus.
+
+ If unsure, say N
+
config BCMA_DEBUG
bool "BCMA debugging"
depends on BCMA
diff --git a/drivers/bcma/Makefile b/drivers/bcma/Makefile
index 8ad42d41b2f..734b32f09c0 100644
--- a/drivers/bcma/Makefile
+++ b/drivers/bcma/Makefile
@@ -6,6 +6,7 @@ bcma-y += driver_pci.o
bcma-$(CONFIG_BCMA_DRIVER_PCI_HOSTMODE) += driver_pci_host.o
bcma-$(CONFIG_BCMA_DRIVER_MIPS) += driver_mips.o
bcma-$(CONFIG_BCMA_DRIVER_GMAC_CMN) += driver_gmac_cmn.o
+bcma-$(CONFIG_BCMA_DRIVER_GPIO) += driver_gpio.o
bcma-$(CONFIG_BCMA_HOST_PCI) += host_pci.o
bcma-$(CONFIG_BCMA_HOST_SOC) += host_soc.o
obj-$(CONFIG_BCMA) += bcma.o
diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index 537ae53231c..4a2d72ec6d4 100644
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -91,4 +91,14 @@ bool __devinit bcma_core_pci_is_in_hostmode(struct bcma_drv_pci *pc);
void __devinit bcma_core_pci_hostmode_init(struct bcma_drv_pci *pc);
#endif /* CONFIG_BCMA_DRIVER_PCI_HOSTMODE */
+#ifdef CONFIG_BCMA_DRIVER_GPIO
+/* driver_gpio.c */
+int bcma_gpio_init(struct bcma_drv_cc *cc);
+#else
+static inline int bcma_gpio_init(struct bcma_drv_cc *cc)
+{
+ return -ENOTSUPP;
+}
+#endif /* CONFIG_BCMA_DRIVER_GPIO */
+
#endif
diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c
index dc96dd8ebff..e461ad25fda 100644
--- a/drivers/bcma/driver_chipcommon.c
+++ b/drivers/bcma/driver_chipcommon.c
@@ -114,6 +114,8 @@ void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
if (cc->early_setup_done)
return;
+ spin_lock_init(&cc->gpio_lock);
+
if (cc->core->id.rev >= 11)
cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
@@ -202,28 +204,97 @@ u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
{
- return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
+ unsigned long flags;
+ u32 res;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
{
- return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
+ unsigned long flags;
+ u32 res;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
+/*
+ * If the bit is set to 0, chipcommon controlls this GPIO,
+ * if the bit is set to 1, it is used by some part of the chip and not our code.
+ */
u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
{
- return bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
+ unsigned long flags;
+ u32 res;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
{
- return bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
+ unsigned long flags;
+ u32 res;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
{
- return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
+ unsigned long flags;
+ u32 res;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
+}
+
+u32 bcma_chipco_gpio_pullup(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res;
+
+ if (cc->core->id.rev < 20)
+ return 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLUP, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
+}
+
+u32 bcma_chipco_gpio_pulldown(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+ unsigned long flags;
+ u32 res;
+
+ if (cc->core->id.rev < 20)
+ return 0;
+
+ spin_lock_irqsave(&cc->gpio_lock, flags);
+ res = bcma_cc_write32_masked(cc, BCMA_CC_GPIOPULLDOWN, mask, value);
+ spin_unlock_irqrestore(&cc->gpio_lock, flags);
+
+ return res;
}
#ifdef CONFIG_BCMA_DRIVER_MIPS
diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c
new file mode 100644
index 00000000000..9a6f585da2d
--- /dev/null
+++ b/drivers/bcma/driver_gpio.c
@@ -0,0 +1,98 @@
+/*
+ * Broadcom specific AMBA
+ * GPIO driver
+ *
+ * Copyright 2011, Broadcom Corporation
+ * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/gpio.h>
+#include <linux/export.h>
+#include <linux/bcma/bcma.h>
+
+#include "bcma_private.h"
+
+static inline struct bcma_drv_cc *bcma_gpio_get_cc(struct gpio_chip *chip)
+{
+ return container_of(chip, struct bcma_drv_cc, gpio);
+}
+
+static int bcma_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ return !!bcma_chipco_gpio_in(cc, 1 << gpio);
+}
+
+static void bcma_gpio_set_value(struct gpio_chip *chip, unsigned gpio,
+ int value)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
+}
+
+static int bcma_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ bcma_chipco_gpio_outen(cc, 1 << gpio, 0);
+ return 0;
+}
+
+static int bcma_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
+ int value)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ bcma_chipco_gpio_outen(cc, 1 << gpio, 1 << gpio);
+ bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
+ return 0;
+}
+
+static int bcma_gpio_request(struct gpio_chip *chip, unsigned gpio)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ bcma_chipco_gpio_control(cc, 1 << gpio, 0);
+ /* clear pulldown */
+ bcma_chipco_gpio_pulldown(cc, 1 << gpio, 0);
+ /* Set pullup */
+ bcma_chipco_gpio_pullup(cc, 1 << gpio, 1 << gpio);
+
+ return 0;
+}
+
+static void bcma_gpio_free(struct gpio_chip *chip, unsigned gpio)
+{
+ struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+ /* clear pullup */
+ bcma_chipco_gpio_pullup(cc, 1 << gpio, 0);
+}
+
+int bcma_gpio_init(struct bcma_drv_cc *cc)
+{
+ struct gpio_chip *chip = &cc->gpio;
+
+ chip->label = "bcma_gpio";
+ chip->owner = THIS_MODULE;
+ chip->request = bcma_gpio_request;
+ chip->free = bcma_gpio_free;
+ chip->get = bcma_gpio_get_value;
+ chip->set = bcma_gpio_set_value;
+ chip->direction_input = bcma_gpio_direction_input;
+ chip->direction_output = bcma_gpio_direction_output;
+ chip->ngpio = 16;
+ /* There is just one SoC in one device and its GPIO addresses should be
+ * deterministic to address them more easily. The other buses could get
+ * a random base number. */
+ if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
+ chip->base = 0;
+ else
+ chip->base = -1;
+
+ return gpiochip_add(chip);
+}
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index debd4f142f9..53ba20ca17e 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -164,6 +164,11 @@ static int bcma_register_cores(struct bcma_bus *bus)
bcma_err(bus, "Error registering NAND flash\n");
}
#endif
+ err = bcma_gpio_init(&bus->drv_cc);
+ if (err == -ENOTSUPP)
+ bcma_debug(bus, "GPIO driver not activated\n");
+ else if (err)
+ bcma_err(bus, "Error registering GPIO driver: %i\n", err);
if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
err = bcma_chipco_watchdog_register(&bus->drv_cc);