diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/Kconfig | 30 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 2 | ||||
| -rw-r--r-- | drivers/gpio/gpio-ich.c | 419 | ||||
| -rw-r--r-- | drivers/gpio/gpio-sch.c | 8 | ||||
| -rw-r--r-- | drivers/gpio/gpio-sta2x11.c | 435 | ||||
| -rw-r--r-- | drivers/gpio/gpio-tps65910.c | 188 | ||||
| -rw-r--r-- | drivers/gpio/gpio-wm831x.c | 6 |
7 files changed, 1037 insertions, 51 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index aa3642c..0356099 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -167,6 +167,14 @@ config GPIO_PXA help Say yes here to support the PXA GPIO device +config GPIO_STA2X11 + bool "STA2x11/ConneXt GPIO support" + depends on MFD_STA2X11 + select GENERIC_IRQ_CHIP + help + Say yes here to support the STA2x11/ConneXt GPIO device. + The GPIO module has 128 GPIO pins with alternate functions. + config GPIO_XILINX bool "Xilinx GPIO support" depends on PPC_OF || MICROBLAZE @@ -180,13 +188,13 @@ config GPIO_VR41XX Say yes here to support the NEC VR4100 series General-purpose I/O Uint config GPIO_SCH - tristate "Intel SCH/TunnelCreek GPIO" + tristate "Intel SCH/TunnelCreek/Centerton GPIO" depends on PCI && X86 select MFD_CORE select LPC_SCH help - Say yes here to support GPIO interface on Intel Poulsbo SCH - or Intel Tunnel Creek processor. + Say yes here to support GPIO interface on Intel Poulsbo SCH, + Intel Tunnel Creek processor or Intel Centerton processor. The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are powered by the core power rail and are turned off during sleep modes (S3 and higher). The remaining four GPIOs are powered by @@ -195,6 +203,22 @@ config GPIO_SCH system from the Suspend-to-RAM state. The Intel Tunnel Creek processor has 5 GPIOs powered by the core power rail and 9 from suspend power supply. + The Intel Centerton processor has a total of 30 GPIO pins. + Twenty-one are powered by the core power rail and 9 from the + suspend power supply. + +config GPIO_ICH + tristate "Intel ICH GPIO" + depends on PCI && X86 + select MFD_CORE + select LPC_ICH + help + Say yes here to support the GPIO functionality of a number of Intel + ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8 + ICH9, ICH10, Series 5/3400 (eg Ibex Peak), Series 6/C200 (eg + Cougar Point), NM10 (Tiger Point), and 3100 (Whitmore Lake). + + If unsure, say N. config GPIO_VX855 tristate "VIA VX855/VX875 GPIO" diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 07a79e2..fde36e5 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_ARCH_DAVINCI) += gpio-davinci.o obj-$(CONFIG_GPIO_EM) += gpio-em.o obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o +obj-$(CONFIG_GPIO_ICH) += gpio-ich.o obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o @@ -51,6 +52,7 @@ obj-$(CONFIG_PLAT_SAMSUNG) += gpio-samsung.o obj-$(CONFIG_ARCH_SA1100) += gpio-sa1100.o obj-$(CONFIG_GPIO_SCH) += gpio-sch.o obj-$(CONFIG_GPIO_SODAVILLE) += gpio-sodaville.o +obj-$(CONFIG_GPIO_STA2X11) += gpio-sta2x11.o obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o obj-$(CONFIG_GPIO_SX150X) += gpio-sx150x.o obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c new file mode 100644 index 0000000..b7c0651 --- /dev/null +++ b/drivers/gpio/gpio-ich.c @@ -0,0 +1,419 @@ +/* + * Intel ICH6-10, Series 5 and 6 GPIO driver + * + * Copyright (C) 2010 Extreme Engineering Solutions. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> +#include <linux/mfd/lpc_ich.h> + +#define DRV_NAME "gpio_ich" + +/* + * GPIO register offsets in GPIO I/O space. + * Each chunk of 32 GPIOs is manipulated via its own USE_SELx, IO_SELx, and + * LVLx registers. Logic in the read/write functions takes a register and + * an absolute bit number and determines the proper register offset and bit + * number in that register. For example, to read the value of GPIO bit 50 + * the code would access offset ichx_regs[2(=GPIO_LVL)][1(=50/32)], + * bit 18 (50%32). + */ +enum GPIO_REG { + GPIO_USE_SEL = 0, + GPIO_IO_SEL, + GPIO_LVL, +}; + +static const u8 ichx_regs[3][3] = { + {0x00, 0x30, 0x40}, /* USE_SEL[1-3] offsets */ + {0x04, 0x34, 0x44}, /* IO_SEL[1-3] offsets */ + {0x0c, 0x38, 0x48}, /* LVL[1-3] offsets */ +}; + +#define ICHX_WRITE(val, reg, base_res) outl(val, (reg) + (base_res)->start) +#define ICHX_READ(reg, base_res) inl((reg) + (base_res)->start) + +struct ichx_desc { + /* Max GPIO pins the chipset can have */ + uint ngpio; + + /* Whether the chipset has GPIO in GPE0_STS in the PM IO region */ + bool uses_gpe0; + + /* USE_SEL is bogus on some chipsets, eg 3100 */ + u32 use_sel_ignore[3]; + + /* Some chipsets have quirks, let these use their own request/get */ + int (*request)(struct gpio_chip *chip, unsigned offset); + int (*get)(struct gpio_chip *chip, unsigned offset); +}; + +static struct { + spinlock_t lock; + struct platform_device *dev; + struct gpio_chip chip; + struct resource *gpio_base; /* GPIO IO base */ + struct resource *pm_base; /* Power Mangagment IO base */ + struct ichx_desc *desc; /* Pointer to chipset-specific description */ + u32 orig_gpio_ctrl; /* Orig CTRL value, used to restore on exit */ +} ichx_priv; + +static int modparam_gpiobase = -1; /* dynamic */ +module_param_named(gpiobase, modparam_gpiobase, int, 0444); +MODULE_PARM_DESC(gpiobase, "The GPIO number base. -1 means dynamic, " + "which is the default."); + +static int ichx_write_bit(int reg, unsigned nr, int val, int verify) +{ + unsigned long flags; + u32 data, tmp; + int reg_nr = nr / 32; + int bit = nr & 0x1f; + int ret = 0; + + spin_lock_irqsave(&ichx_priv.lock, flags); + + data = ICHX_READ(ichx_regs[reg][reg_nr], ichx_priv.gpio_base); + if (val) + data |= 1 << bit; + else + data &= ~(1 << bit); + ICHX_WRITE(data, ichx_regs[reg][reg_nr], ichx_priv.gpio_base); + tmp = ICHX_READ(ichx_regs[reg][reg_nr], ichx_priv.gpio_base); + if (verify && data != tmp) + ret = -EPERM; + + spin_unlock_irqrestore(&ichx_priv.lock, flags); + + return ret; +} + +static int ichx_read_bit(int reg, unsigned nr) +{ + unsigned long flags; + u32 data; + int reg_nr = nr / 32; + int bit = nr & 0x1f; + + spin_lock_irqsave(&ichx_priv.lock, flags); + + data = ICHX_READ(ichx_regs[reg][reg_nr], ichx_priv.gpio_base); + + spin_unlock_irqrestore(&ichx_priv.lock, flags); + + return data & (1 << bit) ? 1 : 0; +} + +static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) +{ + /* + * Try setting pin as an input and verify it worked since many pins + * are output-only. + */ + if (ichx_write_bit(GPIO_IO_SEL, nr, 1, 1)) + return -EINVAL; + + return 0; +} + +static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, + int val) +{ + /* Set GPIO output value. */ + ichx_write_bit(GPIO_LVL, nr, val, 0); + + /* + * Try setting pin as an output and verify it worked since many pins + * are input-only. + */ + if (ichx_write_bit(GPIO_IO_SEL, nr, 0, 1)) + return -EINVAL; + + return 0; +} + +static int ichx_gpio_get(struct gpio_chip *chip, unsigned nr) +{ + return ichx_read_bit(GPIO_LVL, nr); +} + +static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr) +{ + unsigned long flags; + u32 data; + + /* + * GPI 0 - 15 need to be read from the power management registers on + * a ICH6/3100 bridge. + */ + if (nr < 16) { + if (!ichx_priv.pm_base) + return -ENXIO; + + spin_lock_irqsave(&ichx_priv.lock, flags); + + /* GPI 0 - 15 are latched, write 1 to clear*/ + ICHX_WRITE(1 << (16 + nr), 0, ichx_priv.pm_base); + data = ICHX_READ(0, ichx_priv.pm_base); + + spin_unlock_irqrestore(&ichx_priv.lock, flags); + + return (data >> 16) & (1 << nr) ? 1 : 0; + } else { + return ichx_gpio_get(chip, nr); + } +} + +static int ichx_gpio_request(struct gpio_chip *chip, unsigned nr) +{ + /* + * Note we assume the BIOS properly set a bridge's USE value. Some + * chips (eg Intel 3100) have bogus USE values though, so first see if + * the chipset's USE value can be trusted for this specific bit. + * If it can't be trusted, assume that the pin can be used as a GPIO. + */ + if (ichx_priv.desc->use_sel_ignore[nr / 32] & (1 << (nr & 0x1f))) + return 1; + + return ichx_read_bit(GPIO_USE_SEL, nr) ? 0 : -ENODEV; +} + +static int ich6_gpio_request(struct gpio_chip *chip, unsigned nr) +{ + /* + * Fixups for bits 16 and 17 are necessary on the Intel ICH6/3100 + * bridge as they are controlled by USE register bits 0 and 1. See + * "Table 704 GPIO_USE_SEL1 register" in the i3100 datasheet for + * additional info. + */ + if (nr == 16 || nr == 17) + nr -= 16; + + return ichx_gpio_request(chip, nr); +} + +static void ichx_gpio_set(struct gpio_chip *chip, unsigned nr, int val) +{ + ichx_write_bit(GPIO_LVL, nr, val, 0); +} + +static void __devinit ichx_gpiolib_setup(struct gpio_chip *chip) +{ + chip->owner = THIS_MODULE; + chip->label = DRV_NAME; + chip->dev = &ichx_priv.dev->dev; + + /* Allow chip-specific overrides of request()/get() */ + chip->request = ichx_priv.desc->request ? + ichx_priv.desc->request : ichx_gpio_request; + chip->get = ichx_priv.desc->get ? + ichx_priv.desc->get : ichx_gpio_get; + + chip->set = ichx_gpio_set; + chip->direction_input = ichx_gpio_direction_input; + chip->direction_output = ichx_gpio_direction_output; + chip->base = modparam_gpiobase; + chip->ngpio = ichx_priv.desc->ngpio; + chip->can_sleep = 0; + chip->dbg_show = NULL; +} + +/* ICH6-based, 631xesb-based */ +static struct ichx_desc ich6_desc = { + /* Bridges using the ICH6 controller need fixups for GPIO 0 - 17 */ + .request = ich6_gpio_request, + .get = ich6_gpio_get, + + /* GPIO 0-15 are read in the GPE0_STS PM register */ + .uses_gpe0 = true, + + .ngpio = 50, +}; + +/* Intel 3100 */ +static struct ichx_desc i3100_desc = { + /* + * Bits 16,17, 20 of USE_SEL and bit 16 of USE_SEL2 always read 0 on + * the Intel 3100. See "Table 712. GPIO Summary Table" of 3100 + * Datasheet for more info. + */ + .use_sel_ignore = {0x00130000, 0x00010000, 0x0}, + + /* The 3100 needs fixups for GPIO 0 - 17 */ + .request = ich6_gpio_request, + .get = ich6_gpio_get, + + /* GPIO 0-15 are read in the GPE0_STS PM register */ + .uses_gpe0 = true, + + .ngpio = 50, +}; + +/* ICH7 and ICH8-based */ +static struct ichx_desc ich7_desc = { + .ngpio = 50, +}; + +/* ICH9-based */ +static struct ichx_desc ich9_desc = { + .ngpio = 61, +}; + +/* ICH10-based - Consumer/corporate versions have different amount of GPIO */ +static struct ichx_desc ich10_cons_desc = { + .ngpio = 61, +}; +static struct ichx_desc ich10_corp_desc = { + .ngpio = 72, +}; + +/* Intel 5 series, 6 series, 3400 series, and C200 series */ +static struct ichx_desc intel5_desc = { + .ngpio = 76, +}; + +static int __devinit ichx_gpio_probe(struct platform_device *pdev) +{ + struct resource *res_base, *res_pm; + int err; + struct lpc_ich_info *ich_info = pdev->dev.platform_data; + + if (!ich_info) + return -ENODEV; + + ichx_priv.dev = pdev; + + switch (ich_info->gpio_version) { + case ICH_I3100_GPIO: + ichx_priv.desc = &i3100_desc; + break; + case ICH_V5_GPIO: + ichx_priv.desc = &intel5_desc; + break; + case ICH_V6_GPIO: + ichx_priv.desc = &ich6_desc; + break; + case ICH_V7_GPIO: + ichx_priv.desc = &ich7_desc; + break; + case ICH_V9_GPIO: + ichx_priv.desc = &ich9_desc; + break; + case ICH_V10CORP_GPIO: + ichx_priv.desc = &ich10_corp_desc; + break; + case ICH_V10CONS_GPIO: + ichx_priv.desc = &ich10_cons_desc; + break; + default: + return -ENODEV; + } + + res_base = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_GPIO); + if (!res_base || !res_base->start || !res_base->end) + return -ENODEV; + + if (!request_region(res_base->start, resource_size(res_base), + pdev->name)) + return -EBUSY; + + ichx_priv.gpio_base = res_base; + + /* + * If necessary, determine the I/O address of ACPI/power management + * registers which are needed to read the the GPE0 register for GPI pins + * 0 - 15 on some chipsets. + */ + if (!ichx_priv.desc->uses_gpe0) + goto init; + + res_pm = platform_get_resource(pdev, IORESOURCE_IO, ICH_RES_GPE0); + if (!res_pm) { + pr_warn("ACPI BAR is unavailable, GPI 0 - 15 unavailable\n"); + goto init; + } + + if (!request_region(res_pm->start, resource_size(res_pm), + pdev->name)) { + pr_warn("ACPI BAR is busy, GPI 0 - 15 unavailable\n"); + goto init; + } + + ichx_priv.pm_base = res_pm; + +init: + ichx_gpiolib_setup(&ichx_priv.chip); + err = gpiochip_add(&ichx_priv.chip); + if (err) { + pr_err("Failed to register GPIOs\n"); + goto add_err; + } + + pr_info("GPIO from %d to %d on %s\n", ichx_priv.chip.base, + ichx_priv.chip.base + ichx_priv.chip.ngpio - 1, DRV_NAME); + + return 0; + +add_err: + release_region(ichx_priv.gpio_base->start, + resource_size(ichx_priv.gpio_base)); + if (ichx_priv.pm_base) + release_region(ichx_priv.pm_base->start, + resource_size(ichx_priv.pm_base)); + return err; +} + +static int __devexit ichx_gpio_remove(struct platform_device *pdev) +{ + int err; + + err = gpiochip_remove(&ichx_priv.chip); + if (err) { + dev_err(&pdev->dev, "%s failed, %d\n", + "gpiochip_remove()", err); + return err; + } + + release_region(ichx_priv.gpio_base->start, + resource_size(ichx_priv.gpio_base)); + if (ichx_priv.pm_base) + release_region(ichx_priv.pm_base->start, + resource_size(ichx_priv.pm_base)); + + return 0; +} + +static struct platform_driver ichx_gpio_driver = { + .driver = { + .owner = THIS_MODULE, + .name = DRV_NAME, + }, + .probe = ichx_gpio_probe, + .remove = __devexit_p(ichx_gpio_remove), +}; + +module_platform_driver(ichx_gpio_driver); + +MODULE_AUTHOR("Peter Tyser <ptyser@xes-inc.com>"); +MODULE_DESCRIPTION("GPIO interface for Intel ICH series"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:"DRV_NAME); diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c index 8cadf4d..424dce8 100644 --- a/drivers/gpio/gpio-sch.c +++ b/drivers/gpio/gpio-sch.c @@ -232,6 +232,14 @@ static int __devinit sch_gpio_probe(struct platform_device *pdev) sch_gpio_resume.ngpio = 9; break; + case PCI_DEVICE_ID_INTEL_CENTERTON_ILB: + sch_gpio_core.base = 0; + sch_gpio_core.ngpio = 21; + + sch_gpio_resume.base = 21; + sch_gpio_resume.ngpio = 9; + break; + default: return -ENODEV; } diff --git a/drivers/gpio/gpio-sta2x11.c b/drivers/gpio/gpio-sta2x11.c new file mode 100644 index 0000000..38416be --- /dev/null +++ b/drivers/gpio/gpio-sta2x11.c @@ -0,0 +1,435 @@ +/* + * STMicroelectronics ConneXt (STA2X11) GPIO driver + * + * Copyright 2012 ST Microelectronics (Alessandro Rubini) + * Based on gpio-ml-ioh.c, Copyright 2010 OKI Semiconductors Ltd. + * Also based on previous sta2x11 work, Copyright 2011 Wind River Systems, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/mfd/sta2x11-mfd.h> + +struct gsta_regs { + u32 dat; /* 0x00 */ + u32 dats; + u32 datc; + u32 pdis; + u32 dir; /* 0x10 */ + u32 dirs; + u32 dirc; + u32 unused_1c; + u32 afsela; /* 0x20 */ + u32 unused_24[7]; + u32 rimsc; /* 0x40 */ + u32 fimsc; + u32 is; + u32 ic; +}; + +struct gsta_gpio { + spinlock_t lock; + struct device *dev; + void __iomem *reg_base; + struct gsta_regs __iomem *regs[GSTA_NR_BLOCKS]; + struct gpio_chip gpio; + int irq_base; + /* FIXME: save the whole config here (AF, ...) */ + unsigned irq_type[GSTA_NR_GPIO]; +}; + +static inline struct gsta_regs __iomem *__regs(struct gsta_gpio *chip, int nr) +{ + return chip->regs[nr / GSTA_GPIO_PER_BLOCK]; +} + +static inline u32 __bit(int nr) +{ + return 1U << (nr % GSTA_GPIO_PER_BLOCK); +} + +/* + * gpio methods + */ + +static void gsta_gpio_set(struct gpio_chip *gpio, unsigned nr, int val) +{ + struct gsta_gpio *chip = container_of(gpio, struct gsta_gpio, gpio); + struct gsta_regs __iomem *regs = __regs(chip, nr); + u32 bit = __bit(nr); + + if (val) + writel(bit, ®s->dats); + else + writel(bit, ®s->datc); +} + +static int gsta_gpio_get(struct gpio_chip *gpio, unsigned nr) +{ + struct gsta_gpio *chip = container_of(gpio, struct gsta_gpio, gpio); + struct gsta_regs __iomem *regs = __regs(chip, nr); + u32 bit = __bit(nr); + + return readl(®s->dat) & bit; +} + +static int gsta_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, + int val) +{ + struct gsta_gpio *chip = container_of(gpio, struct gsta_gpio, gpio); + struct gsta_regs __iomem *regs = __regs(chip, nr); + u32 bit = __bit(nr); + + writel(bit, ®s->dirs); + /* Data register after direction, otherwise pullup/down is selected */ + if (val) + writel(bit, ®s->dats); + else + writel(bit, ®s->datc); + return 0; +} + +static int gsta_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) +{ + struct gsta_gpio *chip = container_of(gpio, struct gsta_gpio, gpio); + struct gsta_regs __iomem *regs = __regs(chip, nr); + u32 bit = __bit(nr); + + writel(bit, ®s->dirc); + return 0; +} + +static int gsta_gpio_to_irq(struct gpio_chip *gpio, unsigned offset) +{ + struct gsta_gpio *chip = container_of(gpio, struct gsta_gpio, gpio); + return chip->irq_base + offset; +} + +static void gsta_gpio_setup(struct gsta_gpio *chip) /* called from probe */ +{ + struct gpio_chip *gpio = &chip->gpio; + + /* + * ARCH_NR_GPIOS is currently 256 and dynamic allocation starts + * from the end. However, for compatibility, we need the first + * ConneXt device to start from gpio 0: it's the main chipset + * on most boards so documents and drivers assume gpio0..gpio127 + */ + static int gpio_base; + + gpio->label = dev_name(chip->dev); + gpio->owner = THIS_MODULE; + gpio->direction_input = gsta_gpio_direction_input; + gpio->get = gsta_gpio_get; + gpio->direction_output = gsta_gpio_direction_output; + gpio->set = gsta_gpio_set; + gpio->dbg_show = NULL; + gpio->base = gpio_base; + gpio->ngpio = GSTA_NR_GPIO; + gpio->can_sleep = 0; + gpio->to_irq = gsta_gpio_to_irq; + + /* + * After the first device, turn to dynamic gpio numbers. + * For example, with ARCH_NR_GPIOS = 256 we can fit two cards + */ + if (!gpio_base) + gpio_base = -1; +} + +/* + * Special method: alternate functions and pullup/pulldown. This is only + * invoked on startup to configure gpio's according to platform data. + * FIXME : this functionality shall be managed (and exported to other drivers) + * via the pin control subsystem. + */ +static void gsta_set_config(struct gsta_gpio *chip, int nr, unsigned cfg) +{ + struct gsta_regs __iomem *regs = __regs(chip, nr); + unsigned long flags; + u32 bit = __bit(nr); + u32 val; + int err = 0; + + pr_info("%s: %p %i %i\n", __func__, chip, nr, cfg); + + if (cfg == PINMUX_TYPE_NONE) + return; + + /* Alternate function or not? */ + spin_lock_irqsave(&chip->lock, flags); + val = readl(®s->afsela); + if (cfg == PINMUX_TYPE_FUNCTION) + val |= bit; + else + val &= ~bit; + writel(val | bit, ®s->afsela); + if (cfg == PINMUX_TYPE_FUNCTION) { + spin_unlock_irqrestore(&chip->lock, flags); + return; + } + + /* not alternate function: set details */ + switch (cfg) { + case PINMUX_TYPE_OUTPUT_LOW: + writel(bit, ®s->dirs); + writel(bit, ®s->datc); + break; + case PINMUX_TYPE_OUTPUT_HIGH: + writel(bit, ®s->dirs); + writel(bit, ®s->dats); + break; + case PINMUX_TYPE_INPUT: + writel(bit, ®s->dirc); + val = readl(®s->pdis) | bit; + writel(val, ®s->pdis); + break; + case PINMUX_TYPE_INPUT_PULLUP: + writel(bit, ®s->dirc); + val = readl(®s->pdis) & ~bit; + writel(val, ®s->pdis); + writel(bit, ®s->dats); + break; + case PINMUX_TYPE_INPUT_PULLDOWN: + writel(bit, ®s->dirc); + val = readl(®s->pdis) & ~bit; + writel(val, ®s->pdis); + writel(bit, ®s->datc); + break; + default: + err = 1; + } + spin_unlock_irqrestore(&chip->lock, flags); + if (err) + pr_err("%s: chip %p, pin %i, cfg %i is invalid\n", + __func__, chip, nr, cfg); +} + +/* + * Irq methods + */ + +static void gsta_irq_disable(struct irq_data *data) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); + struct gsta_gpio *chip = gc->private; + int nr = data->irq - chip->irq_base; + struct gsta_regs __iomem *regs = __regs(chip, nr); + u32 bit = __bit(nr); + u32 val; + unsigned long flags; + + spin_lock_irqsave(&chip->lock, flags); + if (chip->irq_type[nr] & IRQ_TYPE_EDGE_RISING) { + val = readl(®s->rimsc) & ~bit; + writel(val, ®s->rimsc); + } + if (chip->irq_type[nr] & IRQ_TYPE_EDGE_FALLING) { + val = readl(®s->fimsc) & ~bit; + writel(val, ®s->fimsc); + } + spin_unlock_irqrestore(&chip->lock, flags); + return; +} + +static void gsta_irq_enable(struct irq_data *data) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); + struct gsta_gpio *chip = gc->private; + int nr = data->irq - chip->irq_base; + struct gsta_regs __iomem *regs = __regs(chip, nr); + u32 bit = __bit(nr); + u32 val; + int type; + unsigned long flags; + + type = chip->irq_type[nr]; + + spin_lock_irqsave(&chip->lock, flags); + val = readl(®s->rimsc); + if (type & IRQ_TYPE_EDGE_RISING) + writel(val | bit, ®s->rimsc); + else + writel(val & ~bit, ®s->rimsc); + val = readl(®s->rimsc); + if (type & IRQ_TYPE_EDGE_FALLING) + writel(val | bit, ®s->fimsc); + else + writel(val & ~bit, ®s->fimsc); + spin_unlock_irqrestore(&chip->lock, flags); + return; +} + +static int gsta_irq_type(struct irq_data *d, unsigned int type) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct gsta_gpio *chip = gc->private; + int nr = d->irq - chip->irq_base; + + /* We only support edge interrupts */ + if (!(type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))) { + pr_debug("%s: unsupported type 0x%x\n", __func__, type); + return -EINVAL; + } + + chip->irq_type[nr] = type; /* used for enable/disable */ + + gsta_irq_enable(d); + return 0; +} + +static irqreturn_t gsta_gpio_handler(int irq, void *dev_id) +{ + struct gsta_gpio *chip = dev_id; + struct gsta_regs __iomem *regs; + u32 is; + int i, nr, base; + irqreturn_t ret = IRQ_NONE; + + for (i = 0; i < GSTA_NR_BLOCKS; i++) { + regs = chip->regs[i]; + base = chip->irq_base + i * GSTA_GPIO_PER_BLOCK; + while ((is = readl(®s->is))) { + nr = __ffs(is); + irq = base + nr; + generic_handle_irq(irq); + writel(1 << nr, ®s->ic); + ret = IRQ_HANDLED; + } + } + return ret; +} + +static __devinit void gsta_alloc_irq_chip(struct gsta_gpio *chip) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + gc = irq_alloc_generic_chip(KBUILD_MODNAME, 1, chip->irq_base, + chip->reg_base, handle_simple_irq); + gc->private = chip; + ct = gc->chip_types; + + ct->chip.irq_set_type = gsta_irq_type; + ct->chip.irq_disable = gsta_irq_disable; + ct->chip.irq_enable = gsta_irq_enable; + + /* FIXME: this makes at most 32 interrupts. Request 0 by now */ + irq_setup_generic_chip(gc, 0 /* IRQ_MSK(GSTA_GPIO_PER_BLOCK) */, 0, + IRQ_NOREQUEST | IRQ_NOPROBE, 0); + + /* Set up all all 128 interrupts: code from setup_generic_chip */ + { + struct irq_chip_type *ct = gc->chip_types; + int i, j; + for (j = 0; j < GSTA_NR_GPIO; j++) { + i = chip->irq_base + j; + irq_set_chip_and_handler(i, &ct->chip, ct->handler); + irq_set_chip_data(i, gc); + irq_modify_status(i, IRQ_NOREQUEST | IRQ_NOPROBE, 0); + } + gc->irq_cnt = i - gc->irq_base; + } +} + +/* The platform device used here is instantiated by the MFD device */ +static int __devinit gsta_probe(struct platform_device *dev) +{ + int i, err; + struct pci_dev *pdev; + struct sta2x11_gpio_pdata *gpio_pdata; + struct gsta_gpio *chip; + struct resource *res; + + pdev = *(struct pci_dev **)(dev->dev.platform_data); + gpio_pdata = dev_get_platdata(&pdev->dev); + + if (gpio_pdata == NULL) + dev_err(&dev->dev, "no gpio config\n"); + pr_debug("gpio config: %p\n", gpio_pdata); + + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + + chip = devm_kzalloc(&dev->dev, sizeof(*chip), GFP_KERNEL); + chip->dev = &dev->dev; + chip->reg_base = devm_request_and_ioremap(&dev->dev, res); + + for (i = 0; i < GSTA_NR_BLOCKS; i++) { + chip->regs[i] = chip->reg_base + i * 4096; + /* disable all irqs */ + writel(0, &chip->regs[i]->rimsc); + writel(0, &chip->regs[i]->fimsc); + writel(~0, &chip->regs[i]->ic); + } + spin_lock_init(&chip->lock); + gsta_gpio_setup(chip); + for (i = 0; i < GSTA_NR_GPIO; i++) + gsta_set_config(chip, i, gpio_pdata->pinconfig[i]); + + /* 384 was used in previous code: be compatible for other drivers */ + err = irq_alloc_descs(-1, 384, GSTA_NR_GPIO, NUMA_NO_NODE); + if (err < 0) { + dev_warn(&dev->dev, "sta2x11 gpio: Can't get irq base (%i)\n", + -err); + return err; + } + chip->irq_base = err; + gsta_alloc_irq_chip(chip); + + err = request_irq(pdev->irq, gsta_gpio_handler, + IRQF_SHARED, KBUILD_MODNAME, chip); + if (err < 0) { + dev_err(&dev->dev, "sta2x11 gpio: Can't request irq (%i)\n", + -err); + goto err_free_descs; + } + + err = gpiochip_add(&chip->gpio); + if (err < 0) { + dev_err(&dev->dev, "sta2x11 gpio: Can't register (%i)\n", + -err); + goto err_free_irq; + } + + platform_set_drvdata(dev, chip); + return 0; + +err_free_irq: + free_irq(pdev->irq, chip); +err_free_descs: + irq_free_descs(chip->irq_base, GSTA_NR_GPIO); + return err; +} + +static struct platform_driver sta2x11_gpio_platform_driver = { + .driver = { + .name = "sta2x11-gpio", + .owner = THIS_MODULE, + }, + .probe = gsta_probe, +}; + +module_platform_driver(sta2x11_gpio_platform_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("sta2x11_gpio GPIO driver"); diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c index 7eef648..c1ad288 100644 --- a/drivers/gpio/gpio-tps65910.c +++ b/drivers/gpio/gpio-tps65910.c @@ -18,14 +18,27 @@ #include <linux/errno.h> #include <linux/gpio.h> #include <linux/i2c.h> +#include <linux/platform_device.h> #include <linux/mfd/tps65910.h> +#include <linux/of_device.h> + +struct tps65910_gpio { + struct gpio_chip gpio_chip; + struct tps65910 *tps65910; +}; + +static inline struct tps65910_gpio *to_tps65910_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct tps65910_gpio, gpio_chip); +} static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); - uint8_t val; + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; + unsigned int val; - tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val); + tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &val); if (val & GPIO_STS_MASK) return 1; @@ -36,83 +49,170 @@ static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, int value) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; if (value) - tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset, + tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_SET_MASK); else - tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset, + tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_SET_MASK); } static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, int value) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; /* Set the initial value */ tps65910_gpio_set(gc, offset, value); - return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset, + return tps65910_reg_set_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_CFG_MASK); } static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) { - struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio); + struct tps65910_gpio *tps65910_gpio = to_tps65910_gpio(gc); + struct tps65910 *tps65910 = tps65910_gpio->tps65910; - return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset, + return tps65910_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset, GPIO_CFG_MASK); } -void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base) +#ifdef CONFIG_OF +static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev, + struct tps65910 *tps65910, int chip_ngpio) { + struct tps65910_board *tps65910_board = tps65910->of_plat_data; + unsigned int prop_array[TPS6591X_MAX_NUM_GPIO]; + int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO); int ret; - struct tps65910_board *board_data; + int idx; + + tps65910_board->gpio_base = -1; + ret = of_property_read_u32_array(tps65910->dev->of_node, + "ti,en-gpio-sleep", prop_array, ngpio); + if (ret < 0) { + dev_dbg(dev, "ti,en-gpio-sleep not specified\n"); + return tps65910_board; + } - if (!gpio_base) - return; + for (idx = 0; idx < ngpio; idx++) + tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0); - tps65910->gpio.owner = THIS_MODULE; - tps65910->gpio.label = tps65910->i2c_client->name; - tps65910->gpio.dev = tps65910->dev; - tps65910->gpio.base = gpio_base; + return tps65910_board; +} +#else +static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev, + struct tps65910 *tps65910, int chip_ngpio) +{ + return NULL; +} +#endif + +static int __devinit tps65910_gpio_probe(struct platform_device *pdev) +{ + struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); + struct tps65910_board *pdata = dev_get_platdata(tps65910->dev); + struct tps65910_gpio *tps65910_gpio; + int ret; + int i; + + tps65910_gpio = devm_kzalloc(&pdev->dev, + sizeof(*tps65910_gpio), GFP_KERNEL); + if (!tps65910_gpio) { + dev_err(&pdev->dev, "Could not allocate tps65910_gpio\n"); + return -ENOMEM; + } + + tps65910_gpio->tps65910 = tps65910; + + tps65910_gpio->gpio_chip.owner = THIS_MODULE; + tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name; switch(tps65910_chip_id(tps65910)) { case TPS65910: - tps65910->gpio.ngpio = TPS65910_NUM_GPIO; + tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO; break; case TPS65911: - tps65910->gpio.ngpio = TPS65911_NUM_GPIO; + tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO; break; default: - return; + return -EINVAL; + } + tps65910_gpio->gpio_chip.can_sleep = 1; + tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input; + tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output; + tps65910_gpio->gpio_chip.set = tps65910_gpio_set; + tps65910_gpio->gpio_chip.get = tps65910_gpio_get; + tps65910_gpio->gpio_chip.dev = &pdev->dev; + if (pdata && pdata->gpio_base) + tps65910_gpio->gpio_chip.base = pdata->gpio_base; + else + tps65910_gpio->gpio_chip.base = -1; + + if (!pdata && tps65910->dev->of_node) + pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910, + tps65910_gpio->gpio_chip.ngpio); + + if (!pdata) + goto skip_init; + + /* Configure sleep control for gpios if provided */ + for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) { + if (!pdata->en_gpio_sleep[i]) + continue; + + ret = tps65910_reg_set_bits(tps65910, + TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); + if (ret < 0) + dev_warn(tps65910->dev, + "GPIO Sleep setting failed with err %d\n", ret); } - tps65910->gpio.can_sleep = 1; - - tps65910->gpio.direction_input = tps65910_gpio_input; - tps65910->gpio.direction_output = tps65910_gpio_output; - tps65910->gpio.set = tps65910_gpio_set; - tps65910->gpio.get = tps65910_gpio_get; - - /* Configure sleep control for gpios */ - board_data = dev_get_platdata(tps65910->dev); - if (board_data) { - int i; - for (i = 0; i < tps65910->gpio.ngpio; ++i) { - if (board_data->en_gpio_sleep[i]) { - ret = tps65910_set_bits(tps65910, - TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); - if (ret < 0) - dev_warn(tps65910->dev, - "GPIO Sleep setting failed\n"); - } - } + +skip_init: + ret = gpiochip_add(&tps65910_gpio->gpio_chip); + if (ret < 0) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; } - ret = gpiochip_add(&tps65910->gpio); + platform_set_drvdata(pdev, tps65910_gpio); + + return ret; +} + +static int __devexit tps65910_gpio_remove(struct platform_device *pdev) +{ + struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev); - if (ret) - dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret); + return gpiochip_remove(&tps65910_gpio->gpio_chip); } + +static struct platform_driver tps65910_gpio_driver = { + .driver.name = "tps65910-gpio", + .driver.owner = THIS_MODULE, + .probe = tps65910_gpio_probe, + .remove = __devexit_p(tps65910_gpio_remove), +}; + +static int __init tps65910_gpio_init(void) +{ + return platform_driver_register(&tps65910_gpio_driver); +} +subsys_initcall(tps65910_gpio_init); + +static void __exit tps65910_gpio_exit(void) +{ + platform_driver_unregister(&tps65910_gpio_driver); +} +module_exit(tps65910_gpio_exit); + +MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>"); +MODULE_AUTHOR("Jorge Eduardo Candelaria jedu@slimlogic.co.uk>"); +MODULE_DESCRIPTION("GPIO interface for TPS65910/TPS6511 PMICs"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:tps65910-gpio"); diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c index deb949e..e56a216 100644 --- a/drivers/gpio/gpio-wm831x.c +++ b/drivers/gpio/gpio-wm831x.c @@ -102,10 +102,8 @@ static int wm831x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) struct wm831x_gpio *wm831x_gpio = to_wm831x_gpio(chip); struct wm831x *wm831x = wm831x_gpio->wm831x; - if (!wm831x->irq_base) - return -EINVAL; - - return wm831x->irq_base + WM831X_IRQ_GPIO_1 + offset; + return irq_create_mapping(wm831x->irq_domain, + WM831X_IRQ_GPIO_1 + offset); } static int wm831x_gpio_set_debounce(struct gpio_chip *chip, unsigned offset, |