Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:
	Documentation/feature-removal-schedule.txt
	drivers/scsi/fcoe/fcoe.c
	net/core/drop_monitor.c
	net/core/net-traces.c

1 files changed, 552 insertions, 0 deletions

diff --git a/arch/arm/plat-stmp3xxx/pinmux.c b/arch/arm/plat-stmp3xxx/pinmux.c
new file mode 100644
index 00000000000..d4120038220
--- /dev/null
+++ b/arch/arm/plat-stmp3xxx/pinmux.c
@@ -0,0 +1,552 @@
+/*
+ * Freescale STMP378X/STMP378X Pin Multiplexing
+ *
+ * Author: Vladislav Buzov <vbuzov@embeddedalley.com>
+ *
+ * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#define DEBUG
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sysdev.h>
+#include <linux/string.h>
+#include <linux/bitops.h>
+#include <linux/sysdev.h>
+#include <linux/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include <mach/regs-pinctrl.h>
+#include <mach/pins.h>
+#include <mach/pinmux.h>
+
+#define NR_BANKS ARRAY_SIZE(pinmux_banks)
+static struct stmp3xxx_pinmux_bank pinmux_banks[] = {
+	[0] = {
+		.hw_muxsel = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL0,
+			REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL1,
+		},
+		.hw_drive = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE0,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE1,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE2,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE3,
+		},
+		.hw_pull = REGS_PINCTRL_BASE + HW_PINCTRL_PULL0,
+		.functions = { 0x0, 0x1, 0x2, 0x3 },
+		.strengths = { 0x0, 0x1, 0x2, 0x3, 0xff },
+
+		.hw_gpio_in = REGS_PINCTRL_BASE + HW_PINCTRL_DIN0,
+		.hw_gpio_out = REGS_PINCTRL_BASE + HW_PINCTRL_DOUT0,
+		.hw_gpio_doe = REGS_PINCTRL_BASE + HW_PINCTRL_DOE0,
+		.irq = IRQ_GPIO0,
+
+		.pin2irq = REGS_PINCTRL_BASE + HW_PINCTRL_PIN2IRQ0,
+		.irqstat = REGS_PINCTRL_BASE + HW_PINCTRL_IRQSTAT0,
+		.irqlevel = REGS_PINCTRL_BASE + HW_PINCTRL_IRQLEVEL0,
+		.irqpolarity = REGS_PINCTRL_BASE + HW_PINCTRL_IRQPOL0,
+		.irqen = REGS_PINCTRL_BASE + HW_PINCTRL_IRQEN0,
+	},
+	[1] = {
+		.hw_muxsel = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL2,
+			REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL3,
+		},
+		.hw_drive = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE4,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE5,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE6,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE7,
+		},
+		.hw_pull = REGS_PINCTRL_BASE + HW_PINCTRL_PULL1,
+		.functions = { 0x0, 0x1, 0x2, 0x3 },
+		.strengths = { 0x0, 0x1, 0x2, 0x3, 0xff },
+
+		.hw_gpio_in = REGS_PINCTRL_BASE + HW_PINCTRL_DIN1,
+		.hw_gpio_out = REGS_PINCTRL_BASE + HW_PINCTRL_DOUT1,
+		.hw_gpio_doe = REGS_PINCTRL_BASE + HW_PINCTRL_DOE1,
+		.irq = IRQ_GPIO1,
+
+		.pin2irq = REGS_PINCTRL_BASE + HW_PINCTRL_PIN2IRQ1,
+		.irqstat = REGS_PINCTRL_BASE + HW_PINCTRL_IRQSTAT1,
+		.irqlevel = REGS_PINCTRL_BASE + HW_PINCTRL_IRQLEVEL1,
+		.irqpolarity = REGS_PINCTRL_BASE + HW_PINCTRL_IRQPOL1,
+		.irqen = REGS_PINCTRL_BASE + HW_PINCTRL_IRQEN1,
+	},
+	[2] = {
+	       .hw_muxsel = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL4,
+			REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL5,
+		},
+		.hw_drive = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE8,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE9,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE10,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE11,
+		},
+		.hw_pull = REGS_PINCTRL_BASE + HW_PINCTRL_PULL2,
+		.functions = { 0x0, 0x1, 0x2, 0x3 },
+		.strengths = { 0x0, 0x1, 0x2, 0x1, 0x2 },
+
+		.hw_gpio_in = REGS_PINCTRL_BASE + HW_PINCTRL_DIN2,
+		.hw_gpio_out = REGS_PINCTRL_BASE + HW_PINCTRL_DOUT2,
+		.hw_gpio_doe = REGS_PINCTRL_BASE + HW_PINCTRL_DOE2,
+		.irq = IRQ_GPIO2,
+
+		.pin2irq = REGS_PINCTRL_BASE + HW_PINCTRL_PIN2IRQ2,
+		.irqstat = REGS_PINCTRL_BASE + HW_PINCTRL_IRQSTAT2,
+		.irqlevel = REGS_PINCTRL_BASE + HW_PINCTRL_IRQLEVEL2,
+		.irqpolarity = REGS_PINCTRL_BASE + HW_PINCTRL_IRQPOL2,
+		.irqen = REGS_PINCTRL_BASE + HW_PINCTRL_IRQEN2,
+	},
+	[3] = {
+	       .hw_muxsel = {
+		       REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL6,
+		       REGS_PINCTRL_BASE + HW_PINCTRL_MUXSEL7,
+	       },
+	       .hw_drive = {
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE12,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE13,
+			REGS_PINCTRL_BASE + HW_PINCTRL_DRIVE14,
+			NULL,
+	       },
+	       .hw_pull = REGS_PINCTRL_BASE + HW_PINCTRL_PULL3,
+	       .functions = {0x0, 0x1, 0x2, 0x3},
+	       .strengths = {0x0, 0x1, 0x2, 0x3, 0xff},
+	},
+};
+
+static inline struct stmp3xxx_pinmux_bank *
+stmp3xxx_pinmux_bank(unsigned id, unsigned *bank, unsigned *pin)
+{
+	unsigned b, p;
+
+	b = STMP3XXX_PINID_TO_BANK(id);
+	p = STMP3XXX_PINID_TO_PINNUM(id);
+	BUG_ON(b >= NR_BANKS);
+	if (bank)
+		*bank = b;
+	if (pin)
+		*pin = p;
+	return &pinmux_banks[b];
+}
+
+/* Check if requested pin is owned by caller */
+static int stmp3xxx_check_pin(unsigned id, const char *label)
+{
+	unsigned pin;
+	struct stmp3xxx_pinmux_bank *pm = stmp3xxx_pinmux_bank(id, NULL, &pin);
+
+	if (!test_bit(pin, &pm->pin_map)) {
+		printk(KERN_WARNING
+		       "%s: Accessing free pin %x, caller %s\n",
+		       __func__, id, label);
+
+		return -EINVAL;
+	}
+
+	if (label && pm->pin_labels[pin] &&
+	    strcmp(label, pm->pin_labels[pin])) {
+		printk(KERN_WARNING
+		       "%s: Wrong pin owner %x, caller %s owner %s\n",
+		       __func__, id, label, pm->pin_labels[pin]);
+
+		return -EINVAL;
+	}
+	return 0;
+}
+
+void stmp3xxx_pin_strength(unsigned id, enum pin_strength strength,
+		const char *label)
+{
+	struct stmp3xxx_pinmux_bank *pbank;
+	void __iomem *hwdrive;
+	u32 shift, val;
+	u32 bank, pin;
+
+	pbank = stmp3xxx_pinmux_bank(id, &bank, &pin);
+	pr_debug("%s: label %s bank %d pin %d strength %d\n", __func__, label,
+		 bank, pin, strength);
+
+	hwdrive = pbank->hw_drive[pin / HW_DRIVE_PIN_NUM];
+	shift = (pin % HW_DRIVE_PIN_NUM) * HW_DRIVE_PIN_LEN;
+	val = pbank->strengths[strength];
+	if (val == 0xff) {
+		printk(KERN_WARNING
+		       "%s: strength is not supported for bank %d, caller %s",
+		       __func__, bank, label);
+		return;
+	}
+
+	if (stmp3xxx_check_pin(id, label))
+		return;
+
+	pr_debug("%s: writing 0x%x to 0x%p register\n", __func__,
+			val << shift, hwdrive);
+	stmp3xxx_clearl(HW_DRIVE_PINDRV_MASK << shift, hwdrive);
+	stmp3xxx_setl(val << shift, hwdrive);
+}
+
+void stmp3xxx_pin_voltage(unsigned id, enum pin_voltage voltage,
+			  const char *label)
+{
+	struct stmp3xxx_pinmux_bank *pbank;
+	void __iomem *hwdrive;
+	u32 shift;
+	u32 bank, pin;
+
+	pbank = stmp3xxx_pinmux_bank(id, &bank, &pin);
+	pr_debug("%s: label %s bank %d pin %d voltage %d\n", __func__, label,
+		 bank, pin, voltage);
+
+	hwdrive = pbank->hw_drive[pin / HW_DRIVE_PIN_NUM];
+	shift = (pin % HW_DRIVE_PIN_NUM) * HW_DRIVE_PIN_LEN;
+
+	if (stmp3xxx_check_pin(id, label))
+		return;
+
+	pr_debug("%s: changing 0x%x bit in 0x%p register\n",
+			__func__, HW_DRIVE_PINV_MASK << shift, hwdrive);
+	if (voltage == PIN_1_8V)
+		stmp3xxx_clearl(HW_DRIVE_PINV_MASK << shift, hwdrive);
+	else
+		stmp3xxx_setl(HW_DRIVE_PINV_MASK << shift, hwdrive);
+}
+
+void stmp3xxx_pin_pullup(unsigned id, int enable, const char *label)
+{
+	struct stmp3xxx_pinmux_bank *pbank;
+	void __iomem *hwpull;
+	u32 bank, pin;
+
+	pbank = stmp3xxx_pinmux_bank(id, &bank, &pin);
+	pr_debug("%s: label %s bank %d pin %d enable %d\n", __func__, label,
+		 bank, pin, enable);
+
+	hwpull = pbank->hw_pull;
+
+	if (stmp3xxx_check_pin(id, label))
+		return;
+
+	pr_debug("%s: changing 0x%x bit in 0x%p register\n",
+			__func__, 1 << pin, hwpull);
+	if (enable)
+		stmp3xxx_setl(1 << pin, hwpull);
+	else
+		stmp3xxx_clearl(1 << pin, hwpull);
+}
+
+int stmp3xxx_request_pin(unsigned id, enum pin_fun fun, const char *label)
+{
+	struct stmp3xxx_pinmux_bank *pbank;
+	u32 bank, pin;
+	int ret = 0;
+
+	pbank = stmp3xxx_pinmux_bank(id, &bank, &pin);
+	pr_debug("%s: label %s bank %d pin %d fun %d\n", __func__, label,
+		 bank, pin, fun);
+
+	if (test_bit(pin, &pbank->pin_map)) {
+		printk(KERN_WARNING
+		       "%s: CONFLICT DETECTED pin %d:%d caller %s owner %s\n",
+		       __func__, bank, pin, label, pbank->pin_labels[pin]);
+		return -EBUSY;
+	}
+
+	set_bit(pin, &pbank->pin_map);
+	pbank->pin_labels[pin] = label;
+
+	stmp3xxx_set_pin_type(id, fun);
+
+	return ret;
+}
+
+void stmp3xxx_set_pin_type(unsigned id, enum pin_fun fun)
+{
+	struct stmp3xxx_pinmux_bank *pbank;
+	void __iomem *hwmux;
+	u32 shift, val;
+	u32 bank, pin;
+
+	pbank = stmp3xxx_pinmux_bank(id, &bank, &pin);
+
+	hwmux = pbank->hw_muxsel[pin / HW_MUXSEL_PIN_NUM];
+	shift = (pin % HW_MUXSEL_PIN_NUM) * HW_MUXSEL_PIN_LEN;
+
+	val = pbank->functions[fun];
+	shift = (pin % HW_MUXSEL_PIN_NUM) * HW_MUXSEL_PIN_LEN;
+	pr_debug("%s: writing 0x%x to 0x%p register\n",
+			__func__, val << shift, hwmux);
+	stmp3xxx_clearl(HW_MUXSEL_PINFUN_MASK << shift, hwmux);
+	stmp3xxx_setl(val << shift, hwmux);
+}
+
+void stmp3xxx_release_pin(unsigned id, const char *label)
+{
+	struct stmp3xxx_pinmux_bank *pbank;
+	u32 bank, pin;
+
+	pbank = stmp3xxx_pinmux_bank(id, &bank, &pin);
+	pr_debug("%s: label %s bank %d pin %d\n", __func__, label, bank, pin);
+
+	if (stmp3xxx_check_pin(id, label))
+		return;
+
+	clear_bit(pin, &pbank->pin_map);
+	pbank->pin_labels[pin] = NULL;
+}
+
+int stmp3xxx_request_pin_group(struct pin_group *pin_group, const char *label)
+{
+	struct pin_desc *pin;
+	int p;
+	int err = 0;
+
+	/* Allocate and configure pins */
+	for (p = 0; p < pin_group->nr_pins; p++) {
+		pr_debug("%s: #%d\n", __func__, p);
+		pin = &pin_group->pins[p];
+
+		err = stmp3xxx_request_pin(pin->id, pin->fun, label);
+		if (err)
+			goto out_err;
+
+		stmp3xxx_pin_strength(pin->id, pin->strength, label);
+		stmp3xxx_pin_voltage(pin->id, pin->voltage, label);
+		stmp3xxx_pin_pullup(pin->id, pin->pullup, label);
+	}
+
+	return 0;
+
+out_err:
+	/* Release allocated pins in case of error */
+	while (--p >= 0) {
+		pr_debug("%s: releasing #%d\n", __func__, p);
+		stmp3xxx_release_pin(pin_group->pins[p].id, label);
+	}
+	return err;
+}
+EXPORT_SYMBOL(stmp3xxx_request_pin_group);
+
+void stmp3xxx_release_pin_group(struct pin_group *pin_group, const char *label)
+{
+	struct pin_desc *pin;
+	int p;
+
+	for (p = 0; p < pin_group->nr_pins; p++) {
+		pin = &pin_group->pins[p];
+		stmp3xxx_release_pin(pin->id, label);
+	}
+}
+EXPORT_SYMBOL(stmp3xxx_release_pin_group);
+
+static int stmp3xxx_irq_to_gpio(int irq,
+	struct stmp3xxx_pinmux_bank **bank, unsigned *gpio)
+{
+	struct stmp3xxx_pinmux_bank *pm;
+
+	for (pm = pinmux_banks; pm < pinmux_banks + NR_BANKS; pm++)
+		if (pm->virq <= irq && irq < pm->virq + 32) {
+			*bank = pm;
+			*gpio = irq - pm->virq;
+			return 0;
+		}
+	return -ENOENT;
+}
+
+static int stmp3xxx_set_irqtype(unsigned irq, unsigned type)
+{
+	struct stmp3xxx_pinmux_bank *pm;
+	unsigned gpio;
+	int l, p;
+
+	stmp3xxx_irq_to_gpio(irq, &pm, &gpio);
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		l = 0; p = 1; break;
+	case IRQ_TYPE_EDGE_FALLING:
+		l = 0; p = 0; break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		l = 1; p = 1; break;
+	case IRQ_TYPE_LEVEL_LOW:
+		l = 1; p = 0; break;
+	default:
+		pr_debug("%s: Incorrect GPIO interrupt type 0x%x\n",
+				__func__, type);
+		return -ENXIO;
+	}
+
+	if (l)
+		stmp3xxx_setl(1 << gpio, pm->irqlevel);
+	else
+		stmp3xxx_clearl(1 << gpio, pm->irqlevel);
+	if (p)
+		stmp3xxx_setl(1 << gpio, pm->irqpolarity);
+	else
+		stmp3xxx_clearl(1 << gpio, pm->irqpolarity);
+	return 0;
+}
+
+static void stmp3xxx_pin_ack_irq(unsigned irq)
+{
+	u32 stat;
+	struct stmp3xxx_pinmux_bank *pm;
+	unsigned gpio;
+
+	stmp3xxx_irq_to_gpio(irq, &pm, &gpio);
+	stat = __raw_readl(pm->irqstat) & (1 << gpio);
+	stmp3xxx_clearl(stat, pm->irqstat);
+}
+
+static void stmp3xxx_pin_mask_irq(unsigned irq)
+{
+	struct stmp3xxx_pinmux_bank *pm;
+	unsigned gpio;
+
+	stmp3xxx_irq_to_gpio(irq, &pm, &gpio);
+	stmp3xxx_clearl(1 << gpio, pm->irqen);
+	stmp3xxx_clearl(1 << gpio, pm->pin2irq);
+}
+
+static void stmp3xxx_pin_unmask_irq(unsigned irq)
+{
+	struct stmp3xxx_pinmux_bank *pm;
+	unsigned gpio;
+
+	stmp3xxx_irq_to_gpio(irq, &pm, &gpio);
+	stmp3xxx_setl(1 << gpio, pm->irqen);
+	stmp3xxx_setl(1 << gpio, pm->pin2irq);
+}
+
+static inline
+struct stmp3xxx_pinmux_bank *to_pinmux_bank(struct gpio_chip *chip)
+{
+	return container_of(chip, struct stmp3xxx_pinmux_bank, chip);
+}
+
+static int stmp3xxx_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct stmp3xxx_pinmux_bank *pm = to_pinmux_bank(chip);
+	return pm->virq + offset;
+}
+
+static int stmp3xxx_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct stmp3xxx_pinmux_bank *pm = to_pinmux_bank(chip);
+	unsigned v;
+
+	v = __raw_readl(pm->hw_gpio_in) & (1 << offset);
+	return v ? 1 : 0;
+}
+
+static void stmp3xxx_gpio_set(struct gpio_chip *chip, unsigned offset, int v)
+{
+	struct stmp3xxx_pinmux_bank *pm = to_pinmux_bank(chip);
+
+	if (v)
+		stmp3xxx_setl(1 << offset, pm->hw_gpio_out);
+	else
+		stmp3xxx_clearl(1 << offset, pm->hw_gpio_out);
+}
+
+static int stmp3xxx_gpio_output(struct gpio_chip *chip, unsigned offset, int v)
+{
+	struct stmp3xxx_pinmux_bank *pm = to_pinmux_bank(chip);
+
+	stmp3xxx_setl(1 << offset, pm->hw_gpio_doe);
+	stmp3xxx_gpio_set(chip, offset, v);
+	return 0;
+}
+
+static int stmp3xxx_gpio_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct stmp3xxx_pinmux_bank *pm = to_pinmux_bank(chip);
+
+	stmp3xxx_clearl(1 << offset, pm->hw_gpio_doe);
+	return 0;
+}
+
+static int stmp3xxx_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return stmp3xxx_request_pin(chip->base + offset, PIN_GPIO, "gpio");
+}
+
+static void stmp3xxx_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	stmp3xxx_release_pin(chip->base + offset, "gpio");
+}
+
+static void stmp3xxx_gpio_irq(u32 irq, struct irq_desc *desc)
+{
+	struct stmp3xxx_pinmux_bank *pm = get_irq_data(irq);
+	int gpio_irq = pm->virq;
+	u32 stat = __raw_readl(pm->irqstat);
+
+	while (stat) {
+		if (stat & 1)
+			irq_desc[gpio_irq].handle_irq(gpio_irq,
+				&irq_desc[gpio_irq]);
+		gpio_irq++;
+		stat >>= 1;
+	}
+}
+
+static struct irq_chip gpio_irq_chip = {
+	.ack	= stmp3xxx_pin_ack_irq,
+	.mask	= stmp3xxx_pin_mask_irq,
+	.unmask	= stmp3xxx_pin_unmask_irq,
+	.set_type = stmp3xxx_set_irqtype,
+};
+
+int __init stmp3xxx_pinmux_init(int virtual_irq_start)
+{
+	int b, r = 0;
+	struct stmp3xxx_pinmux_bank *pm;
+	int virq;
+
+	for (b = 0; b < 3; b++) {
+		/* only banks 0,1,2 are allowed to GPIO */
+		pm = pinmux_banks + b;
+		pm->chip.base = 32 * b;
+		pm->chip.ngpio = 32;
+		pm->chip.owner = THIS_MODULE;
+		pm->chip.can_sleep = 1;
+		pm->chip.exported = 1;
+		pm->chip.to_irq = stmp3xxx_gpio_to_irq;
+		pm->chip.direction_input = stmp3xxx_gpio_input;
+		pm->chip.direction_output = stmp3xxx_gpio_output;
+		pm->chip.get = stmp3xxx_gpio_get;
+		pm->chip.set = stmp3xxx_gpio_set;
+		pm->chip.request = stmp3xxx_gpio_request;
+		pm->chip.free = stmp3xxx_gpio_free;
+		pm->virq = virtual_irq_start + b * 32;
+
+		for (virq = pm->virq; virq < pm->virq; virq++) {
+			gpio_irq_chip.mask(virq);
+			set_irq_chip(virq, &gpio_irq_chip);
+			set_irq_handler(virq, handle_level_irq);
+			set_irq_flags(virq, IRQF_VALID);
+		}
+		r = gpiochip_add(&pm->chip);
+		if (r < 0)
+			break;
+		set_irq_chained_handler(pm->irq, stmp3xxx_gpio_irq);
+		set_irq_data(pm->irq, pm);
+	}
+	return r;
+}
+
+MODULE_AUTHOR("Vladislav Buzov");
+MODULE_LICENSE("GPL");