summaryrefslogtreecommitdiffstats
path: root/drivers/gpio
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-06 17:12:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-06 17:12:03 -0800
commit1197ab2942f920f261952de0c392ac749a35796b (patch)
tree4922ccc8a6061e5ece6ac7420001f3bf4524ea92 /drivers/gpio
parentec773e99ab4abce07b1ae23117179c2861831964 (diff)
parent96cc017c5b7ec095ef047d3c1952b6b6bbf98943 (diff)
downloadlinux-1197ab2942f920f261952de0c392ac749a35796b.tar.gz
linux-1197ab2942f920f261952de0c392ac749a35796b.tar.bz2
linux-1197ab2942f920f261952de0c392ac749a35796b.zip
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (106 commits) powerpc/p3060qds: Add support for P3060QDS board powerpc/83xx: Add shutdown request support to MCU handling on MPC8349 MITX powerpc/85xx: Make kexec to interate over online cpus powerpc/fsl_booke: Fix comment in head_fsl_booke.S powerpc/85xx: issue 15 EOI after core reset for FSL CoreNet devices powerpc/8xxx: Fix interrupt handling in MPC8xxx GPIO driver powerpc/85xx: Add 'fsl,pq3-gpio' compatiable for GPIO driver powerpc/86xx: Correct Gianfar support for GE boards powerpc/cpm: Clear muram before it is in use. drivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager powerpc/fsl_msi: add support for "msi-address-64" property powerpc/85xx: Setup secondary cores PIR with hard SMP id powerpc/fsl-booke: Fix settlbcam for 64-bit powerpc/85xx: Adding DCSR node to dtsi device trees powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards powerpc/85xx: fix PHYS_64BIT selection for P1022DS powerpc/fsl-booke: Fix setup_initial_memory_limit to not blindly map powerpc: respect mem= setting for early memory limit setup powerpc: Update corenet64_smp_defconfig powerpc: Update mpc85xx/corenet 32-bit defconfigs ... Fix up trivial conflicts in: - arch/powerpc/configs/40x/hcu4_defconfig removed stale file, edited elsewhere - arch/powerpc/include/asm/udbg.h, arch/powerpc/kernel/udbg.c: added opal and gelic drivers vs added ePAPR driver - drivers/tty/serial/8250.c moved UPIO_TSI to powerpc vs removed UPIO_DWAPB support
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/Kconfig8
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-mpc8xxx.c398
3 files changed, 407 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 74603ca06e34..8482a23887dc 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -99,6 +99,14 @@ config GPIO_MPC5200
def_bool y
depends on PPC_MPC52xx
+config GPIO_MPC8XXX
+ bool "MPC512x/MPC8xxx GPIO support"
+ depends on PPC_MPC512x || PPC_MPC831x || PPC_MPC834x || PPC_MPC837x || \
+ FSL_SOC_BOOKE || PPC_86xx
+ help
+ Say Y here if you're going to use hardware that connects to the
+ MPC512x/831x/834x/837x/8572/8610 GPIOs.
+
config GPIO_MSM_V1
tristate "Qualcomm MSM GPIO v1"
depends on GPIOLIB && ARCH_MSM
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 4a9ad2f99ada..dbcb0bcfd8da 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_GPIO_MC33880) += gpio-mc33880.o
obj-$(CONFIG_GPIO_MCP23S08) += gpio-mcp23s08.o
obj-$(CONFIG_GPIO_ML_IOH) += gpio-ml-ioh.o
obj-$(CONFIG_GPIO_MPC5200) += gpio-mpc5200.o
+obj-$(CONFIG_GPIO_MPC8XXX) += gpio-mpc8xxx.o
obj-$(CONFIG_GPIO_MSM_V1) += gpio-msm-v1.o
obj-$(CONFIG_GPIO_MSM_V2) += gpio-msm-v2.o
obj-$(CONFIG_GPIO_MXC) += gpio-mxc.o
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
new file mode 100644
index 000000000000..ec3fcf0a7e12
--- /dev/null
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -0,0 +1,398 @@
+/*
+ * GPIOs on MPC512x/8349/8572/8610 and compatible
+ *
+ * Copyright (C) 2008 Peter Korsgaard <jacmet@sunsite.dk>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/irq.h>
+
+#define MPC8XXX_GPIO_PINS 32
+
+#define GPIO_DIR 0x00
+#define GPIO_ODR 0x04
+#define GPIO_DAT 0x08
+#define GPIO_IER 0x0c
+#define GPIO_IMR 0x10
+#define GPIO_ICR 0x14
+#define GPIO_ICR2 0x18
+
+struct mpc8xxx_gpio_chip {
+ struct of_mm_gpio_chip mm_gc;
+ spinlock_t lock;
+
+ /*
+ * shadowed data register to be able to clear/set output pins in
+ * open drain mode safely
+ */
+ u32 data;
+ struct irq_host *irq;
+ void *of_dev_id_data;
+};
+
+static inline u32 mpc8xxx_gpio2mask(unsigned int gpio)
+{
+ return 1u << (MPC8XXX_GPIO_PINS - 1 - gpio);
+}
+
+static inline struct mpc8xxx_gpio_chip *
+to_mpc8xxx_gpio_chip(struct of_mm_gpio_chip *mm)
+{
+ return container_of(mm, struct mpc8xxx_gpio_chip, mm_gc);
+}
+
+static void mpc8xxx_gpio_save_regs(struct of_mm_gpio_chip *mm)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+
+ mpc8xxx_gc->data = in_be32(mm->regs + GPIO_DAT);
+}
+
+/* Workaround GPIO 1 errata on MPC8572/MPC8536. The status of GPIOs
+ * defined as output cannot be determined by reading GPDAT register,
+ * so we use shadow data register instead. The status of input pins
+ * is determined by reading GPDAT register.
+ */
+static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+ u32 val;
+ struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+
+ val = in_be32(mm->regs + GPIO_DAT) & ~in_be32(mm->regs + GPIO_DIR);
+
+ return (val | mpc8xxx_gc->data) & mpc8xxx_gpio2mask(gpio);
+}
+
+static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
+
+ return in_be32(mm->regs + GPIO_DAT) & mpc8xxx_gpio2mask(gpio);
+}
+
+static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+ struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+ unsigned long flags;
+
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+
+ if (val)
+ mpc8xxx_gc->data |= mpc8xxx_gpio2mask(gpio);
+ else
+ mpc8xxx_gc->data &= ~mpc8xxx_gpio2mask(gpio);
+
+ out_be32(mm->regs + GPIO_DAT, mpc8xxx_gc->data);
+
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+}
+
+static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+ unsigned long flags;
+
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+
+ clrbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
+
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+
+ return 0;
+}
+
+static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
+{
+ struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+ unsigned long flags;
+
+ mpc8xxx_gpio_set(gc, gpio, val);
+
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+
+ setbits32(mm->regs + GPIO_DIR, mpc8xxx_gpio2mask(gpio));
+
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+
+ return 0;
+}
+
+static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+ struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+
+ if (mpc8xxx_gc->irq && offset < MPC8XXX_GPIO_PINS)
+ return irq_create_mapping(mpc8xxx_gc->irq, offset);
+ else
+ return -ENXIO;
+}
+
+static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
+ unsigned int mask;
+
+ mask = in_be32(mm->regs + GPIO_IER) & in_be32(mm->regs + GPIO_IMR);
+ if (mask)
+ generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
+ 32 - ffs(mask)));
+ chip->irq_eoi(&desc->irq_data);
+}
+
+static void mpc8xxx_irq_unmask(struct irq_data *d)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
+ struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+
+ setbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+}
+
+static void mpc8xxx_irq_mask(struct irq_data *d)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
+ struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+
+ clrbits32(mm->regs + GPIO_IMR, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+}
+
+static void mpc8xxx_irq_ack(struct irq_data *d)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
+ struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
+
+ out_be32(mm->regs + GPIO_IER, mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+}
+
+static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
+ struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
+ unsigned long flags;
+
+ switch (flow_type) {
+ case IRQ_TYPE_EDGE_FALLING:
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ setbits32(mm->regs + GPIO_ICR,
+ mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ break;
+
+ case IRQ_TYPE_EDGE_BOTH:
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ clrbits32(mm->regs + GPIO_ICR,
+ mpc8xxx_gpio2mask(irqd_to_hwirq(d)));
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mpc512x_irq_set_type(struct irq_data *d, unsigned int flow_type)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_data_get_irq_chip_data(d);
+ struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
+ unsigned long gpio = irqd_to_hwirq(d);
+ void __iomem *reg;
+ unsigned int shift;
+ unsigned long flags;
+
+ if (gpio < 16) {
+ reg = mm->regs + GPIO_ICR;
+ shift = (15 - gpio) * 2;
+ } else {
+ reg = mm->regs + GPIO_ICR2;
+ shift = (15 - (gpio % 16)) * 2;
+ }
+
+ switch (flow_type) {
+ case IRQ_TYPE_EDGE_FALLING:
+ case IRQ_TYPE_LEVEL_LOW:
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ clrsetbits_be32(reg, 3 << shift, 2 << shift);
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ break;
+
+ case IRQ_TYPE_EDGE_RISING:
+ case IRQ_TYPE_LEVEL_HIGH:
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ clrsetbits_be32(reg, 3 << shift, 1 << shift);
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ break;
+
+ case IRQ_TYPE_EDGE_BOTH:
+ spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
+ clrbits32(reg, 3 << shift);
+ spin_unlock_irqrestore(&mpc8xxx_gc->lock, flags);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct irq_chip mpc8xxx_irq_chip = {
+ .name = "mpc8xxx-gpio",
+ .irq_unmask = mpc8xxx_irq_unmask,
+ .irq_mask = mpc8xxx_irq_mask,
+ .irq_ack = mpc8xxx_irq_ack,
+ .irq_set_type = mpc8xxx_irq_set_type,
+};
+
+static int mpc8xxx_gpio_irq_map(struct irq_host *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc = h->host_data;
+
+ if (mpc8xxx_gc->of_dev_id_data)
+ mpc8xxx_irq_chip.irq_set_type = mpc8xxx_gc->of_dev_id_data;
+
+ irq_set_chip_data(virq, h->host_data);
+ irq_set_chip_and_handler(virq, &mpc8xxx_irq_chip, handle_level_irq);
+ irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+ return 0;
+}
+
+static int mpc8xxx_gpio_irq_xlate(struct irq_host *h, struct device_node *ct,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq,
+ unsigned int *out_flags)
+
+{
+ /* interrupt sense values coming from the device tree equal either
+ * EDGE_FALLING or EDGE_BOTH
+ */
+ *out_hwirq = intspec[0];
+ *out_flags = intspec[1];
+
+ return 0;
+}
+
+static struct irq_host_ops mpc8xxx_gpio_irq_ops = {
+ .map = mpc8xxx_gpio_irq_map,
+ .xlate = mpc8xxx_gpio_irq_xlate,
+};
+
+static struct of_device_id mpc8xxx_gpio_ids[] __initdata = {
+ { .compatible = "fsl,mpc8349-gpio", },
+ { .compatible = "fsl,mpc8572-gpio", },
+ { .compatible = "fsl,mpc8610-gpio", },
+ { .compatible = "fsl,mpc5121-gpio", .data = mpc512x_irq_set_type, },
+ { .compatible = "fsl,pq3-gpio", },
+ { .compatible = "fsl,qoriq-gpio", },
+ {}
+};
+
+static void __init mpc8xxx_add_controller(struct device_node *np)
+{
+ struct mpc8xxx_gpio_chip *mpc8xxx_gc;
+ struct of_mm_gpio_chip *mm_gc;
+ struct gpio_chip *gc;
+ const struct of_device_id *id;
+ unsigned hwirq;
+ int ret;
+
+ mpc8xxx_gc = kzalloc(sizeof(*mpc8xxx_gc), GFP_KERNEL);
+ if (!mpc8xxx_gc) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ spin_lock_init(&mpc8xxx_gc->lock);
+
+ mm_gc = &mpc8xxx_gc->mm_gc;
+ gc = &mm_gc->gc;
+
+ mm_gc->save_regs = mpc8xxx_gpio_save_regs;
+ gc->ngpio = MPC8XXX_GPIO_PINS;
+ gc->direction_input = mpc8xxx_gpio_dir_in;
+ gc->direction_output = mpc8xxx_gpio_dir_out;
+ if (of_device_is_compatible(np, "fsl,mpc8572-gpio"))
+ gc->get = mpc8572_gpio_get;
+ else
+ gc->get = mpc8xxx_gpio_get;
+ gc->set = mpc8xxx_gpio_set;
+ gc->to_irq = mpc8xxx_gpio_to_irq;
+
+ ret = of_mm_gpiochip_add(np, mm_gc);
+ if (ret)
+ goto err;
+
+ hwirq = irq_of_parse_and_map(np, 0);
+ if (hwirq == NO_IRQ)
+ goto skip_irq;
+
+ mpc8xxx_gc->irq =
+ irq_alloc_host(np, IRQ_HOST_MAP_LINEAR, MPC8XXX_GPIO_PINS,
+ &mpc8xxx_gpio_irq_ops, MPC8XXX_GPIO_PINS);
+ if (!mpc8xxx_gc->irq)
+ goto skip_irq;
+
+ id = of_match_node(mpc8xxx_gpio_ids, np);
+ if (id)
+ mpc8xxx_gc->of_dev_id_data = id->data;
+
+ mpc8xxx_gc->irq->host_data = mpc8xxx_gc;
+
+ /* ack and mask all irqs */
+ out_be32(mm_gc->regs + GPIO_IER, 0xffffffff);
+ out_be32(mm_gc->regs + GPIO_IMR, 0);
+
+ irq_set_handler_data(hwirq, mpc8xxx_gc);
+ irq_set_chained_handler(hwirq, mpc8xxx_gpio_irq_cascade);
+
+skip_irq:
+ return;
+
+err:
+ pr_err("%s: registration failed with status %d\n",
+ np->full_name, ret);
+ kfree(mpc8xxx_gc);
+
+ return;
+}
+
+static int __init mpc8xxx_add_gpiochips(void)
+{
+ struct device_node *np;
+
+ for_each_matching_node(np, mpc8xxx_gpio_ids)
+ mpc8xxx_add_controller(np);
+
+ return 0;
+}
+arch_initcall(mpc8xxx_add_gpiochips);