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-rw-r--r--arch/arm/plat-stmp3xxx/pinmux.c550
1 files changed, 0 insertions, 550 deletions
diff --git a/arch/arm/plat-stmp3xxx/pinmux.c b/arch/arm/plat-stmp3xxx/pinmux.c
deleted file mode 100644
index 3def03b3217..00000000000
--- a/arch/arm/plat-stmp3xxx/pinmux.c
+++ /dev/null
@@ -1,550 +0,0 @@
-/*
- * 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/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_data_to_gpio(struct irq_data *d,
- 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 <= d->irq && d->irq < pm->virq + 32) {
- *bank = pm;
- *gpio = d->irq - pm->virq;
- return 0;
- }
- return -ENOENT;
-}
-
-static int stmp3xxx_set_irqtype(struct irq_data *d, unsigned type)
-{
- struct stmp3xxx_pinmux_bank *pm;
- unsigned gpio;
- int l, p;
-
- stmp3xxx_irq_data_to_gpio(d, &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(struct irq_data *d)
-{
- u32 stat;
- struct stmp3xxx_pinmux_bank *pm;
- unsigned gpio;
-
- stmp3xxx_irq_data_to_gpio(d, &pm, &gpio);
- stat = __raw_readl(pm->irqstat) & (1 << gpio);
- stmp3xxx_clearl(stat, pm->irqstat);
-}
-
-static void stmp3xxx_pin_mask_irq(struct irq_data *d)
-{
- struct stmp3xxx_pinmux_bank *pm;
- unsigned gpio;
-
- stmp3xxx_irq_data_to_gpio(d, &pm, &gpio);
- stmp3xxx_clearl(1 << gpio, pm->irqen);
- stmp3xxx_clearl(1 << gpio, pm->pin2irq);
-}
-
-static void stmp3xxx_pin_unmask_irq(struct irq_data *d)
-{
- struct stmp3xxx_pinmux_bank *pm;
- unsigned gpio;
-
- stmp3xxx_irq_data_to_gpio(d, &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 = irq_get_handler_data(irq);
- int gpio_irq = pm->virq;
- u32 stat = __raw_readl(pm->irqstat);
-
- while (stat) {
- if (stat & 1)
- generic_handle_irq(gpio_irq);
- gpio_irq++;
- stat >>= 1;
- }
-}
-
-static struct irq_chip gpio_irq_chip = {
- .irq_ack = stmp3xxx_pin_ack_irq,
- .irq_mask = stmp3xxx_pin_mask_irq,
- .irq_unmask = stmp3xxx_pin_unmask_irq,
- .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.irq_mask(irq_get_irq_data(virq));
- irq_set_chip_and_handler(virq, &gpio_irq_chip,
- handle_level_irq);
- set_irq_flags(virq, IRQF_VALID);
- }
- r = gpiochip_add(&pm->chip);
- if (r < 0)
- break;
- irq_set_chained_handler(pm->irq, stmp3xxx_gpio_irq);
- irq_set_handler_data(pm->irq, pm);
- }
- return r;
-}
-
-MODULE_AUTHOR("Vladislav Buzov");
-MODULE_LICENSE("GPL");