This driver provides an in-kernel interface to those GPIOs using
platform-neutral GPIO calls.
+config GPIO_TWL4030
+ tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
+ depends on TWL4030_CORE
+ help
+ Say yes here to access the GPIO signals of various multi-function
+ power management chips from Texas Instruments.
+
comment "PCI GPIO expanders:"
config GPIO_BT8XX
obj-$(CONFIG_GPIO_MCP23S08) += mcp23s08.o
obj-$(CONFIG_GPIO_PCA953X) += pca953x.o
obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o
+obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o
obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o
--- /dev/null
+/*
+ * twl4030_gpio.c -- access to GPIOs on TWL4030/TPS659x0 chips
+ *
+ * Copyright (C) 2006-2007 Texas Instruments, Inc.
+ * Copyright (C) 2006 MontaVista Software, Inc.
+ *
+ * Code re-arranged and cleaned up by:
+ * Syed Mohammed Khasim <x0khasim@ti.com>
+ *
+ * Initial Code:
+ * Andy Lowe / Nishanth Menon
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/i2c/twl4030.h>
+
+
+/*
+ * The GPIO "subchip" supports 18 GPIOs which can be configured as
+ * inputs or outputs, with pullups or pulldowns on each pin. Each
+ * GPIO can trigger interrupts on either or both edges.
+ *
+ * GPIO interrupts can be fed to either of two IRQ lines; this is
+ * intended to support multiple hosts.
+ *
+ * There are also two LED pins used sometimes as output-only GPIOs.
+ */
+
+
+static struct gpio_chip twl_gpiochip;
+static int twl4030_gpio_irq_base;
+
+/* genirq interfaces are not available to modules */
+#ifdef MODULE
+#define is_module() true
+#else
+#define is_module() false
+#endif
+
+/* GPIO_CTRL Fields */
+#define MASK_GPIO_CTRL_GPIO0CD1 BIT(0)
+#define MASK_GPIO_CTRL_GPIO1CD2 BIT(1)
+#define MASK_GPIO_CTRL_GPIO_ON BIT(2)
+
+/* Mask for GPIO registers when aggregated into a 32-bit integer */
+#define GPIO_32_MASK 0x0003ffff
+
+/* Data structures */
+static DEFINE_MUTEX(gpio_lock);
+
+/* store usage of each GPIO. - each bit represents one GPIO */
+static unsigned int gpio_usage_count;
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * To configure TWL4030 GPIO module registers
+ */
+static inline int gpio_twl4030_write(u8 address, u8 data)
+{
+ return twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, data, address);
+}
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * LED register offsets (use TWL4030_MODULE_{LED,PWMA,PWMB}))
+ * PWMs A and B are dedicated to LEDs A and B, respectively.
+ */
+
+#define TWL4030_LED_LEDEN 0x0
+
+/* LEDEN bits */
+#define LEDEN_LEDAON BIT(0)
+#define LEDEN_LEDBON BIT(1)
+#define LEDEN_LEDAEXT BIT(2)
+#define LEDEN_LEDBEXT BIT(3)
+#define LEDEN_LEDAPWM BIT(4)
+#define LEDEN_LEDBPWM BIT(5)
+#define LEDEN_PWM_LENGTHA BIT(6)
+#define LEDEN_PWM_LENGTHB BIT(7)
+
+#define TWL4030_PWMx_PWMxON 0x0
+#define TWL4030_PWMx_PWMxOFF 0x1
+
+#define PWMxON_LENGTH BIT(7)
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * To read a TWL4030 GPIO module register
+ */
+static inline int gpio_twl4030_read(u8 address)
+{
+ u8 data;
+ int ret = 0;
+
+ ret = twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &data, address);
+ return (ret < 0) ? ret : data;
+}
+
+/*----------------------------------------------------------------------*/
+
+static u8 cached_leden; /* protected by gpio_lock */
+
+/* The LED lines are open drain outputs ... a FET pulls to GND, so an
+ * external pullup is needed. We could also expose the integrated PWM
+ * as a LED brightness control; we initialize it as "always on".
+ */
+static void twl4030_led_set_value(int led, int value)
+{
+ u8 mask = LEDEN_LEDAON | LEDEN_LEDAPWM;
+ int status;
+
+ if (led)
+ mask <<= 1;
+
+ mutex_lock(&gpio_lock);
+ if (value)
+ cached_leden &= ~mask;
+ else
+ cached_leden |= mask;
+ status = twl4030_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
+ TWL4030_LED_LEDEN);
+ mutex_unlock(&gpio_lock);
+}
+
+static int twl4030_set_gpio_direction(int gpio, int is_input)
+{
+ u8 d_bnk = gpio >> 3;
+ u8 d_msk = BIT(gpio & 0x7);
+ u8 reg = 0;
+ u8 base = REG_GPIODATADIR1 + d_bnk;
+ int ret = 0;
+
+ mutex_lock(&gpio_lock);
+ ret = gpio_twl4030_read(base);
+ if (ret >= 0) {
+ if (is_input)
+ reg = ret & ~d_msk;
+ else
+ reg = ret | d_msk;
+
+ ret = gpio_twl4030_write(base, reg);
+ }
+ mutex_unlock(&gpio_lock);
+ return ret;
+}
+
+static int twl4030_set_gpio_dataout(int gpio, int enable)
+{
+ u8 d_bnk = gpio >> 3;
+ u8 d_msk = BIT(gpio & 0x7);
+ u8 base = 0;
+
+ if (enable)
+ base = REG_SETGPIODATAOUT1 + d_bnk;
+ else
+ base = REG_CLEARGPIODATAOUT1 + d_bnk;
+
+ return gpio_twl4030_write(base, d_msk);
+}
+
+static int twl4030_get_gpio_datain(int gpio)
+{
+ u8 d_bnk = gpio >> 3;
+ u8 d_off = gpio & 0x7;
+ u8 base = 0;
+ int ret = 0;
+
+ if (unlikely((gpio >= TWL4030_GPIO_MAX)
+ || !(gpio_usage_count & BIT(gpio))))
+ return -EPERM;
+
+ base = REG_GPIODATAIN1 + d_bnk;
+ ret = gpio_twl4030_read(base);
+ if (ret > 0)
+ ret = (ret >> d_off) & 0x1;
+
+ return ret;
+}
+
+/*
+ * Configure debounce timing value for a GPIO pin on TWL4030
+ */
+int twl4030_set_gpio_debounce(int gpio, int enable)
+{
+ u8 d_bnk = gpio >> 3;
+ u8 d_msk = BIT(gpio & 0x7);
+ u8 reg = 0;
+ u8 base = 0;
+ int ret = 0;
+
+ if (unlikely((gpio >= TWL4030_GPIO_MAX)
+ || !(gpio_usage_count & BIT(gpio))))
+ return -EPERM;
+
+ base = REG_GPIO_DEBEN1 + d_bnk;
+ mutex_lock(&gpio_lock);
+ ret = gpio_twl4030_read(base);
+ if (ret >= 0) {
+ if (enable)
+ reg = ret | d_msk;
+ else
+ reg = ret & ~d_msk;
+
+ ret = gpio_twl4030_write(base, reg);
+ }
+ mutex_unlock(&gpio_lock);
+ return ret;
+}
+EXPORT_SYMBOL(twl4030_set_gpio_debounce);
+
+/*----------------------------------------------------------------------*/
+
+static int twl_request(struct gpio_chip *chip, unsigned offset)
+{
+ int status = 0;
+
+ mutex_lock(&gpio_lock);
+
+ /* Support the two LED outputs as output-only GPIOs. */
+ if (offset >= TWL4030_GPIO_MAX) {
+ u8 ledclr_mask = LEDEN_LEDAON | LEDEN_LEDAEXT
+ | LEDEN_LEDAPWM | LEDEN_PWM_LENGTHA;
+ u8 module = TWL4030_MODULE_PWMA;
+
+ offset -= TWL4030_GPIO_MAX;
+ if (offset) {
+ ledclr_mask <<= 1;
+ module = TWL4030_MODULE_PWMB;
+ }
+
+ /* initialize PWM to always-drive */
+ status = twl4030_i2c_write_u8(module, 0x7f,
+ TWL4030_PWMx_PWMxOFF);
+ if (status < 0)
+ goto done;
+ status = twl4030_i2c_write_u8(module, 0x7f,
+ TWL4030_PWMx_PWMxON);
+ if (status < 0)
+ goto done;
+
+ /* init LED to not-driven (high) */
+ module = TWL4030_MODULE_LED;
+ status = twl4030_i2c_read_u8(module, &cached_leden,
+ TWL4030_LED_LEDEN);
+ if (status < 0)
+ goto done;
+ cached_leden &= ~ledclr_mask;
+ status = twl4030_i2c_write_u8(module, cached_leden,
+ TWL4030_LED_LEDEN);
+ if (status < 0)
+ goto done;
+
+ status = 0;
+ goto done;
+ }
+
+ /* on first use, turn GPIO module "on" */
+ if (!gpio_usage_count) {
+ struct twl4030_gpio_platform_data *pdata;
+ u8 value = MASK_GPIO_CTRL_GPIO_ON;
+
+ /* optionally have the first two GPIOs switch vMMC1
+ * and vMMC2 power supplies based on card presence.
+ */
+ pdata = chip->dev->platform_data;
+ value |= pdata->mmc_cd & 0x03;
+
+ status = gpio_twl4030_write(REG_GPIO_CTRL, value);
+ }
+
+ if (!status)
+ gpio_usage_count |= (0x1 << offset);
+
+done:
+ mutex_unlock(&gpio_lock);
+ return status;
+}
+
+static void twl_free(struct gpio_chip *chip, unsigned offset)
+{
+ if (offset >= TWL4030_GPIO_MAX) {
+ twl4030_led_set_value(offset - TWL4030_GPIO_MAX, 1);
+ return;
+ }
+
+ mutex_lock(&gpio_lock);
+
+ gpio_usage_count &= ~BIT(offset);
+
+ /* on last use, switch off GPIO module */
+ if (!gpio_usage_count)
+ gpio_twl4030_write(REG_GPIO_CTRL, 0x0);
+
+ mutex_unlock(&gpio_lock);
+}
+
+static int twl_direction_in(struct gpio_chip *chip, unsigned offset)
+{
+ return (offset < TWL4030_GPIO_MAX)
+ ? twl4030_set_gpio_direction(offset, 1)
+ : -EINVAL;
+}
+
+static int twl_get(struct gpio_chip *chip, unsigned offset)
+{
+ int status = 0;
+
+ if (offset < TWL4030_GPIO_MAX)
+ status = twl4030_get_gpio_datain(offset);
+ else if (offset == TWL4030_GPIO_MAX)
+ status = cached_leden & LEDEN_LEDAON;
+ else
+ status = cached_leden & LEDEN_LEDBON;
+ return (status < 0) ? 0 : status;
+}
+
+static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value)
+{
+ if (offset < TWL4030_GPIO_MAX) {
+ twl4030_set_gpio_dataout(offset, value);
+ return twl4030_set_gpio_direction(offset, 0);
+ } else {
+ twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value);
+ return 0;
+ }
+}
+
+static void twl_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ if (offset < TWL4030_GPIO_MAX)
+ twl4030_set_gpio_dataout(offset, value);
+ else
+ twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value);
+}
+
+static int twl_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ return (twl4030_gpio_irq_base && (offset < TWL4030_GPIO_MAX))
+ ? (twl4030_gpio_irq_base + offset)
+ : -EINVAL;
+}
+
+static struct gpio_chip twl_gpiochip = {
+ .label = "twl4030",
+ .owner = THIS_MODULE,
+ .request = twl_request,
+ .free = twl_free,
+ .direction_input = twl_direction_in,
+ .get = twl_get,
+ .direction_output = twl_direction_out,
+ .set = twl_set,
+ .to_irq = twl_to_irq,
+ .can_sleep = 1,
+};
+
+/*----------------------------------------------------------------------*/
+
+static int __devinit gpio_twl4030_pulls(u32 ups, u32 downs)
+{
+ u8 message[6];
+ unsigned i, gpio_bit;
+
+ /* For most pins, a pulldown was enabled by default.
+ * We should have data that's specific to this board.
+ */
+ for (gpio_bit = 1, i = 1; i < 6; i++) {
+ u8 bit_mask;
+ unsigned j;
+
+ for (bit_mask = 0, j = 0; j < 8; j += 2, gpio_bit <<= 1) {
+ if (ups & gpio_bit)
+ bit_mask |= 1 << (j + 1);
+ else if (downs & gpio_bit)
+ bit_mask |= 1 << (j + 0);
+ }
+ message[i] = bit_mask;
+ }
+
+ return twl4030_i2c_write(TWL4030_MODULE_GPIO, message,
+ REG_GPIOPUPDCTR1, 5);
+}
+
+static int gpio_twl4030_remove(struct platform_device *pdev);
+
+static int __devinit gpio_twl4030_probe(struct platform_device *pdev)
+{
+ struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
+ int ret;
+
+ /* maybe setup IRQs */
+ if (pdata->irq_base) {
+ if (is_module()) {
+ dev_err(&pdev->dev,
+ "can't dispatch IRQs from modules\n");
+ goto no_irqs;
+ }
+ ret = twl4030_sih_setup(TWL4030_MODULE_GPIO);
+ if (ret < 0)
+ return ret;
+ WARN_ON(ret != pdata->irq_base);
+ twl4030_gpio_irq_base = ret;
+ }
+
+no_irqs:
+ /*
+ * NOTE: boards may waste power if they don't set pullups
+ * and pulldowns correctly ... default for non-ULPI pins is
+ * pulldown, and some other pins may have external pullups
+ * or pulldowns. Careful!
+ */
+ ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns);
+ if (ret)
+ dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n",
+ pdata->pullups, pdata->pulldowns,
+ ret);
+
+ twl_gpiochip.base = pdata->gpio_base;
+ twl_gpiochip.ngpio = TWL4030_GPIO_MAX;
+ twl_gpiochip.dev = &pdev->dev;
+
+ /* NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE,
+ * is (still) clear if use_leds is set.
+ */
+ if (pdata->use_leds)
+ twl_gpiochip.ngpio += 2;
+
+ ret = gpiochip_add(&twl_gpiochip);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "could not register gpiochip, %d\n",
+ ret);
+ twl_gpiochip.ngpio = 0;
+ gpio_twl4030_remove(pdev);
+ } else if (pdata->setup) {
+ int status;
+
+ status = pdata->setup(&pdev->dev,
+ pdata->gpio_base, TWL4030_GPIO_MAX);
+ if (status)
+ dev_dbg(&pdev->dev, "setup --> %d\n", status);
+ }
+
+ return ret;
+}
+
+static int __devexit gpio_twl4030_remove(struct platform_device *pdev)
+{
+ struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
+ int status;
+
+ if (pdata->teardown) {
+ status = pdata->teardown(&pdev->dev,
+ pdata->gpio_base, TWL4030_GPIO_MAX);
+ if (status) {
+ dev_dbg(&pdev->dev, "teardown --> %d\n", status);
+ return status;
+ }
+ }
+
+ status = gpiochip_remove(&twl_gpiochip);
+ if (status < 0)
+ return status;
+
+ if (is_module())
+ return 0;
+
+ /* REVISIT no support yet for deregistering all the IRQs */
+ WARN_ON(1);
+ return -EIO;
+}
+
+/* Note: this hardware lives inside an I2C-based multi-function device. */
+MODULE_ALIAS("platform:twl4030_gpio");
+
+static struct platform_driver gpio_twl4030_driver = {
+ .driver.name = "twl4030_gpio",
+ .driver.owner = THIS_MODULE,
+ .probe = gpio_twl4030_probe,
+ .remove = __devexit_p(gpio_twl4030_remove),
+};
+
+static int __init gpio_twl4030_init(void)
+{
+ return platform_driver_register(&gpio_twl4030_driver);
+}
+subsys_initcall(gpio_twl4030_init);
+
+static void __exit gpio_twl4030_exit(void)
+{
+ platform_driver_unregister(&gpio_twl4030_driver);
+}
+module_exit(gpio_twl4030_exit);
+
+MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_DESCRIPTION("GPIO interface for TWL4030");
+MODULE_LICENSE("GPL");
obj-$(CONFIG_MFD_WM8350) += wm8350.o
obj-$(CONFIG_MFD_WM8350_I2C) += wm8350-i2c.o
-obj-$(CONFIG_TWL4030_CORE) += twl4030-core.o
+obj-$(CONFIG_TWL4030_CORE) += twl4030-core.o twl4030-irq.o
obj-$(CONFIG_MFD_CORE) += mfd-core.o
static int sm501_plat_probe(struct platform_device *dev)
{
struct sm501_devdata *sm;
- int err;
+ int ret;
sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL);
if (sm == NULL) {
dev_err(&dev->dev, "no memory for device data\n");
- err = -ENOMEM;
+ ret = -ENOMEM;
goto err1;
}
sm->dev = &dev->dev;
sm->pdev_id = dev->id;
- sm->irq = platform_get_irq(dev, 0);
- sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
- sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
sm->platdata = dev->dev.platform_data;
- if (sm->irq < 0) {
+ ret = platform_get_irq(dev, 0);
+ if (ret < 0) {
dev_err(&dev->dev, "failed to get irq resource\n");
- err = sm->irq;
goto err_res;
}
+ sm->irq = ret;
+ sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (sm->io_res == NULL || sm->mem_res == NULL) {
dev_err(&dev->dev, "failed to get IO resource\n");
- err = -ENOENT;
+ ret = -ENOENT;
goto err_res;
}
if (sm->regs_claim == NULL) {
dev_err(&dev->dev, "cannot claim registers\n");
- err= -EBUSY;
+ ret = -EBUSY;
goto err_res;
}
if (sm->regs == NULL) {
dev_err(&dev->dev, "cannot remap registers\n");
- err = -EIO;
+ ret = -EIO;
goto err_claim;
}
err_res:
kfree(sm);
err1:
- return err;
+ return ret;
}
goto err3;
}
- sm->regs = ioremap(pci_resource_start(dev, 1),
- pci_resource_len(dev, 1));
+ sm->regs = pci_ioremap_bar(dev, 1);
if (sm->regs == NULL) {
dev_err(&dev->dev, "cannot remap registers\n");
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/mutex.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/random.h>
-#include <linux/kthread.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/i2c/twl4030.h>
#define twl_has_usb() false
#endif
-static inline void activate_irq(int irq)
-{
-#ifdef CONFIG_ARM
- /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
- * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
- */
- set_irq_flags(irq, IRQF_VALID);
-#else
- /* same effect on other architectures */
- set_irq_noprobe(irq);
-#endif
-}
-
-/* Primary Interrupt Handler on TWL4030 Registers */
-
-/* Register Definitions */
-
-#define REG_PIH_ISR_P1 (0x1)
-#define REG_PIH_ISR_P2 (0x2)
-#define REG_PIH_SIR (0x3)
/* Triton Core internal information (BEGIN) */
/*----------------------------------------------------------------------*/
-/**
- * struct twl4030_mod_iregs - TWL module IMR/ISR regs to mask/clear at init
- * @mod_no: TWL4030 module number (e.g., TWL4030_MODULE_GPIO)
- * @sih_ctrl: address of module SIH_CTRL register
- * @reg_cnt: number of IMR/ISR regs
- * @imrs: pointer to array of TWL module interrupt mask register indices
- * @isrs: pointer to array of TWL module interrupt status register indices
- *
- * Ties together TWL4030 modules and lists of IMR/ISR registers to mask/clear
- * during twl_init_irq().
- */
-struct twl4030_mod_iregs {
- const u8 mod_no;
- const u8 sih_ctrl;
- const u8 reg_cnt;
- const u8 *imrs;
- const u8 *isrs;
-};
-
-/* TWL4030 INT module interrupt mask registers */
-static const u8 __initconst twl4030_int_imr_regs[] = {
- TWL4030_INT_PWR_IMR1,
- TWL4030_INT_PWR_IMR2,
-};
-
-/* TWL4030 INT module interrupt status registers */
-static const u8 __initconst twl4030_int_isr_regs[] = {
- TWL4030_INT_PWR_ISR1,
- TWL4030_INT_PWR_ISR2,
-};
-
-/* TWL4030 INTERRUPTS module interrupt mask registers */
-static const u8 __initconst twl4030_interrupts_imr_regs[] = {
- TWL4030_INTERRUPTS_BCIIMR1A,
- TWL4030_INTERRUPTS_BCIIMR1B,
- TWL4030_INTERRUPTS_BCIIMR2A,
- TWL4030_INTERRUPTS_BCIIMR2B,
-};
-
-/* TWL4030 INTERRUPTS module interrupt status registers */
-static const u8 __initconst twl4030_interrupts_isr_regs[] = {
- TWL4030_INTERRUPTS_BCIISR1A,
- TWL4030_INTERRUPTS_BCIISR1B,
- TWL4030_INTERRUPTS_BCIISR2A,
- TWL4030_INTERRUPTS_BCIISR2B,
-};
-
-/* TWL4030 MADC module interrupt mask registers */
-static const u8 __initconst twl4030_madc_imr_regs[] = {
- TWL4030_MADC_IMR1,
- TWL4030_MADC_IMR2,
-};
-
-/* TWL4030 MADC module interrupt status registers */
-static const u8 __initconst twl4030_madc_isr_regs[] = {
- TWL4030_MADC_ISR1,
- TWL4030_MADC_ISR2,
-};
-
-/* TWL4030 keypad module interrupt mask registers */
-static const u8 __initconst twl4030_keypad_imr_regs[] = {
- TWL4030_KEYPAD_KEYP_IMR1,
- TWL4030_KEYPAD_KEYP_IMR2,
-};
-
-/* TWL4030 keypad module interrupt status registers */
-static const u8 __initconst twl4030_keypad_isr_regs[] = {
- TWL4030_KEYPAD_KEYP_ISR1,
- TWL4030_KEYPAD_KEYP_ISR2,
-};
-
-/* TWL4030 GPIO module interrupt mask registers */
-static const u8 __initconst twl4030_gpio_imr_regs[] = {
- REG_GPIO_IMR1A,
- REG_GPIO_IMR1B,
- REG_GPIO_IMR2A,
- REG_GPIO_IMR2B,
- REG_GPIO_IMR3A,
- REG_GPIO_IMR3B,
-};
-
-/* TWL4030 GPIO module interrupt status registers */
-static const u8 __initconst twl4030_gpio_isr_regs[] = {
- REG_GPIO_ISR1A,
- REG_GPIO_ISR1B,
- REG_GPIO_ISR2A,
- REG_GPIO_ISR2B,
- REG_GPIO_ISR3A,
- REG_GPIO_ISR3B,
-};
-
-/* TWL4030 modules that have IMR/ISR registers that must be masked/cleared */
-static const struct twl4030_mod_iregs __initconst twl4030_mod_regs[] = {
- {
- .mod_no = TWL4030_MODULE_INT,
- .sih_ctrl = TWL4030_INT_PWR_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_int_imr_regs),
- .imrs = twl4030_int_imr_regs,
- .isrs = twl4030_int_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_INTERRUPTS,
- .sih_ctrl = TWL4030_INTERRUPTS_BCISIHCTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_interrupts_imr_regs),
- .imrs = twl4030_interrupts_imr_regs,
- .isrs = twl4030_interrupts_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_MADC,
- .sih_ctrl = TWL4030_MADC_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_madc_imr_regs),
- .imrs = twl4030_madc_imr_regs,
- .isrs = twl4030_madc_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_KEYPAD,
- .sih_ctrl = TWL4030_KEYPAD_KEYP_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_keypad_imr_regs),
- .imrs = twl4030_keypad_imr_regs,
- .isrs = twl4030_keypad_isr_regs,
- },
- {
- .mod_no = TWL4030_MODULE_GPIO,
- .sih_ctrl = REG_GPIO_SIH_CTRL,
- .reg_cnt = ARRAY_SIZE(twl4030_gpio_imr_regs),
- .imrs = twl4030_gpio_imr_regs,
- .isrs = twl4030_gpio_isr_regs,
- },
-};
-
-/*----------------------------------------------------------------*/
-
/* is driver active, bound to a chip? */
static bool inuse;
/*----------------------------------------------------------------------*/
-/*
- * TWL4030 doesn't have PIH mask, hence dummy function for mask
- * and unmask of the (eight) interrupts reported at that level ...
- * masking is only available from SIH (secondary) modules.
- */
-
-static void twl4030_i2c_ackirq(unsigned int irq)
-{
-}
-
-static void twl4030_i2c_disableint(unsigned int irq)
-{
-}
-
-static void twl4030_i2c_enableint(unsigned int irq)
-{
-}
-
-static struct irq_chip twl4030_irq_chip = {
- .name = "twl4030",
- .ack = twl4030_i2c_ackirq,
- .mask = twl4030_i2c_disableint,
- .unmask = twl4030_i2c_enableint,
-};
-
-/*----------------------------------------------------------------------*/
-
/* Exported Functions */
/**
/*----------------------------------------------------------------------*/
-static unsigned twl4030_irq_base;
-
-static struct completion irq_event;
-
-/*
- * This thread processes interrupts reported by the Primary Interrupt Handler.
- */
-static int twl4030_irq_thread(void *data)
-{
- long irq = (long)data;
- irq_desc_t *desc = irq_desc + irq;
- static unsigned i2c_errors;
- const static unsigned max_i2c_errors = 100;
-
- current->flags |= PF_NOFREEZE;
-
- while (!kthread_should_stop()) {
- int ret;
- int module_irq;
- u8 pih_isr;
-
- /* Wait for IRQ, then read PIH irq status (also blocking) */
- wait_for_completion_interruptible(&irq_event);
-
- ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
- REG_PIH_ISR_P1);
- if (ret) {
- pr_warning("%s: I2C error %d reading PIH ISR\n",
- DRIVER_NAME, ret);
- if (++i2c_errors >= max_i2c_errors) {
- printk(KERN_ERR "Maximum I2C error count"
- " exceeded. Terminating %s.\n",
- __func__);
- break;
- }
- complete(&irq_event);
- continue;
- }
-
- /* these handlers deal with the relevant SIH irq status */
- local_irq_disable();
- for (module_irq = twl4030_irq_base;
- pih_isr;
- pih_isr >>= 1, module_irq++) {
- if (pih_isr & 0x1) {
- irq_desc_t *d = irq_desc + module_irq;
-
- d->handle_irq(module_irq, d);
- }
- }
- local_irq_enable();
-
- desc->chip->unmask(irq);
- }
-
- return 0;
-}
-
/*
- * do_twl4030_irq() is the desc->handle method for the twl4030 interrupt.
- * This is a chained interrupt, so there is no desc->action method for it.
- * Now we need to query the interrupt controller in the twl4030 to determine
- * which module is generating the interrupt request. However, we can't do i2c
- * transactions in interrupt context, so we must defer that work to a kernel
- * thread. All we do here is acknowledge and mask the interrupt and wakeup
- * the kernel thread.
+ * NOTE: We know the first 8 IRQs after pdata->base_irq are
+ * for the PIH, and the next are for the PWR_INT SIH, since
+ * that's how twl_init_irq() sets things up.
*/
-static void do_twl4030_irq(unsigned int irq, irq_desc_t *desc)
-{
- const unsigned int cpu = smp_processor_id();
-
- /*
- * Earlier this was desc->triggered = 1;
- */
- desc->status |= IRQ_LEVEL;
-
- /*
- * Acknowledge, clear _AND_ disable the interrupt.
- */
- desc->chip->ack(irq);
-
- if (!desc->depth) {
- kstat_cpu(cpu).irqs[irq]++;
-
- complete(&irq_event);
- }
-}
-
-static struct task_struct * __init start_twl4030_irq_thread(long irq)
-{
- struct task_struct *thread;
-
- init_completion(&irq_event);
- thread = kthread_run(twl4030_irq_thread, (void *)irq, "twl4030-irq");
- if (!thread)
- pr_err("%s: could not create twl4030 irq %ld thread!\n",
- DRIVER_NAME, irq);
-
- return thread;
-}
-
-/*----------------------------------------------------------------------*/
static int add_children(struct twl4030_platform_data *pdata)
{
if (status == 0) {
struct resource r = {
- .start = TWL4030_PWRIRQ_CHG_PRES,
+ .start = pdata->irq_base + 8 + 1,
.flags = IORESOURCE_IRQ,
};
/* RTC module IRQ */
if (status == 0) {
struct resource r = {
- /* REVISIT don't hard-wire this stuff */
- .start = TWL4030_PWRIRQ_RTC,
+ .start = pdata->irq_base + 8 + 3,
.flags = IORESOURCE_IRQ,
};
if (status == 0) {
struct resource r = {
- .start = TWL4030_PWRIRQ_USB_PRES,
+ .start = pdata->irq_base + 8 + 2,
.flags = IORESOURCE_IRQ,
};
/*----------------------------------------------------------------------*/
-/**
- * twl4030_i2c_clear_isr - clear TWL4030 SIH ISR regs via read + write
- * @mod_no: TWL4030 module number
- * @reg: register index to clear
- * @cor: value of the <module>_SIH_CTRL.COR bit (1 or 0)
- *
- * Either reads (cor == 1) or writes (cor == 0) to a TWL4030 interrupt
- * status register to ensure that any prior interrupts are cleared.
- * Returns the status from the I2C read operation.
- */
-static int __init twl4030_i2c_clear_isr(u8 mod_no, u8 reg, u8 cor)
-{
- u8 tmp;
-
- return (cor) ? twl4030_i2c_read_u8(mod_no, &tmp, reg) :
- twl4030_i2c_write_u8(mod_no, 0xff, reg);
-}
-
-/**
- * twl4030_read_cor_bit - are TWL module ISRs cleared by reads or writes?
- * @mod_no: TWL4030 module number
- * @reg: register index to clear
- *
- * Returns 1 if the TWL4030 SIH interrupt status registers (ISRs) for
- * the specified TWL module are cleared by reads, or 0 if cleared by
- * writes.
- */
-static int twl4030_read_cor_bit(u8 mod_no, u8 reg)
-{
- u8 tmp = 0;
-
- WARN_ON(twl4030_i2c_read_u8(mod_no, &tmp, reg) < 0);
-
- tmp &= TWL4030_SIH_CTRL_COR_MASK;
- tmp >>= __ffs(TWL4030_SIH_CTRL_COR_MASK);
-
- return tmp;
-}
-
-/**
- * twl4030_mask_clear_intrs - mask and clear all TWL4030 interrupts
- * @t: pointer to twl4030_mod_iregs array
- * @t_sz: ARRAY_SIZE(t) (starting at 1)
- *
- * Mask all TWL4030 interrupt mask registers (IMRs) and clear all
- * interrupt status registers (ISRs). No return value, but will WARN if
- * any I2C operations fail.
- */
-static void __init twl4030_mask_clear_intrs(const struct twl4030_mod_iregs *t,
- const u8 t_sz)
-{
- int i, j;
-
- /*
- * N.B. - further efficiency is possible here. Eight I2C
- * operations on BCI and GPIO modules are avoidable if I2C
- * burst read/write transactions were implemented. Would
- * probably save about 1ms of boot time and a small amount of
- * power.
- */
- for (i = 0; i < t_sz; i++) {
- const struct twl4030_mod_iregs tmr = t[i];
- int cor;
-
- /* Are ISRs cleared by reads or writes? */
- cor = twl4030_read_cor_bit(tmr.mod_no, tmr.sih_ctrl);
-
- for (j = 0; j < tmr.reg_cnt; j++) {
-
- /* Mask interrupts at the TWL4030 */
- WARN_ON(twl4030_i2c_write_u8(tmr.mod_no, 0xff,
- tmr.imrs[j]) < 0);
-
- /* Clear TWL4030 ISRs */
- WARN_ON(twl4030_i2c_clear_isr(tmr.mod_no,
- tmr.isrs[j], cor) < 0);
- }
- }
-}
-
-
-static void twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
-{
- int i;
-
- /*
- * Mask and clear all TWL4030 interrupts since initially we do
- * not have any TWL4030 module interrupt handlers present
- */
- twl4030_mask_clear_intrs(twl4030_mod_regs,
- ARRAY_SIZE(twl4030_mod_regs));
-
- twl4030_irq_base = irq_base;
-
- /* install an irq handler for each of the PIH modules */
- for (i = irq_base; i < irq_end; i++) {
- set_irq_chip_and_handler(i, &twl4030_irq_chip,
- handle_simple_irq);
- activate_irq(i);
- }
-
- /* install an irq handler to demultiplex the TWL4030 interrupt */
- set_irq_data(irq_num, start_twl4030_irq_thread(irq_num));
- set_irq_chained_handler(irq_num, do_twl4030_irq);
-}
-
-/*----------------------------------------------------------------------*/
+int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
+int twl_exit_irq(void);
static int twl4030_remove(struct i2c_client *client)
{
unsigned i;
+ int status;
- /* FIXME undo twl_init_irq() */
- if (twl4030_irq_base) {
- dev_err(&client->dev, "can't yet clean up IRQs?\n");
- return -ENOSYS;
- }
+ status = twl_exit_irq();
+ if (status < 0)
+ return status;
for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
struct twl4030_client *twl = &twl4030_modules[i];
return -EIO;
}
- if (inuse || twl4030_irq_base) {
+ if (inuse) {
dev_dbg(&client->dev, "driver is already in use\n");
return -EBUSY;
}
if (client->irq
&& pdata->irq_base
&& pdata->irq_end > pdata->irq_base) {
- twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
- dev_info(&client->dev, "IRQ %d chains IRQs %d..%d\n",
- client->irq, pdata->irq_base, pdata->irq_end - 1);
+ status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
+ if (status < 0)
+ goto fail;
}
status = add_children(pdata);
--- /dev/null
+/*
+ * twl4030-irq.c - TWL4030/TPS659x0 irq support
+ *
+ * Copyright (C) 2005-2006 Texas Instruments, Inc.
+ *
+ * Modifications to defer interrupt handling to a kernel thread:
+ * Copyright (C) 2006 MontaVista Software, Inc.
+ *
+ * Based on tlv320aic23.c:
+ * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
+ *
+ * Code cleanup and modifications to IRQ handler.
+ * by syed khasim <x0khasim@ti.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kthread.h>
+
+#include <linux/i2c/twl4030.h>
+
+
+/*
+ * TWL4030 IRQ handling has two stages in hardware, and thus in software.
+ * The Primary Interrupt Handler (PIH) stage exposes status bits saying
+ * which Secondary Interrupt Handler (SIH) stage is raising an interrupt.
+ * SIH modules are more traditional IRQ components, which support per-IRQ
+ * enable/disable and trigger controls; they do most of the work.
+ *
+ * These chips are designed to support IRQ handling from two different
+ * I2C masters. Each has a dedicated IRQ line, and dedicated IRQ status
+ * and mask registers in the PIH and SIH modules.
+ *
+ * We set up IRQs starting at a platform-specified base, always starting
+ * with PIH and the SIH for PWR_INT and then usually adding GPIO:
+ * base + 0 .. base + 7 PIH
+ * base + 8 .. base + 15 SIH for PWR_INT
+ * base + 16 .. base + 33 SIH for GPIO
+ */
+
+/* PIH register offsets */
+#define REG_PIH_ISR_P1 0x01
+#define REG_PIH_ISR_P2 0x02
+#define REG_PIH_SIR 0x03 /* for testing */
+
+
+/* Linux could (eventually) use either IRQ line */
+static int irq_line;
+
+struct sih {
+ char name[8];
+ u8 module; /* module id */
+ u8 control_offset; /* for SIH_CTRL */
+ bool set_cor;
+
+ u8 bits; /* valid in isr/imr */
+ u8 bytes_ixr; /* bytelen of ISR/IMR/SIR */
+
+ u8 edr_offset;
+ u8 bytes_edr; /* bytelen of EDR */
+
+ /* SIR ignored -- set interrupt, for testing only */
+ struct irq_data {
+ u8 isr_offset;
+ u8 imr_offset;
+ } mask[2];
+ /* + 2 bytes padding */
+};
+
+#define SIH_INITIALIZER(modname, nbits) \
+ .module = TWL4030_MODULE_ ## modname, \
+ .control_offset = TWL4030_ ## modname ## _SIH_CTRL, \
+ .bits = nbits, \
+ .bytes_ixr = DIV_ROUND_UP(nbits, 8), \
+ .edr_offset = TWL4030_ ## modname ## _EDR, \
+ .bytes_edr = DIV_ROUND_UP((2*(nbits)), 8), \
+ .mask = { { \
+ .isr_offset = TWL4030_ ## modname ## _ISR1, \
+ .imr_offset = TWL4030_ ## modname ## _IMR1, \
+ }, \
+ { \
+ .isr_offset = TWL4030_ ## modname ## _ISR2, \
+ .imr_offset = TWL4030_ ## modname ## _IMR2, \
+ }, },
+
+/* register naming policies are inconsistent ... */
+#define TWL4030_INT_PWR_EDR TWL4030_INT_PWR_EDR1
+#define TWL4030_MODULE_KEYPAD_KEYP TWL4030_MODULE_KEYPAD
+#define TWL4030_MODULE_INT_PWR TWL4030_MODULE_INT
+
+
+/* Order in this table matches order in PIH_ISR. That is,
+ * BIT(n) in PIH_ISR is sih_modules[n].
+ */
+static const struct sih sih_modules[6] = {
+ [0] = {
+ .name = "gpio",
+ .module = TWL4030_MODULE_GPIO,
+ .control_offset = REG_GPIO_SIH_CTRL,
+ .set_cor = true,
+ .bits = TWL4030_GPIO_MAX,
+ .bytes_ixr = 3,
+ /* Note: *all* of these IRQs default to no-trigger */
+ .edr_offset = REG_GPIO_EDR1,
+ .bytes_edr = 5,
+ .mask = { {
+ .isr_offset = REG_GPIO_ISR1A,
+ .imr_offset = REG_GPIO_IMR1A,
+ }, {
+ .isr_offset = REG_GPIO_ISR1B,
+ .imr_offset = REG_GPIO_IMR1B,
+ }, },
+ },
+ [1] = {
+ .name = "keypad",
+ .set_cor = true,
+ SIH_INITIALIZER(KEYPAD_KEYP, 4)
+ },
+ [2] = {
+ .name = "bci",
+ .module = TWL4030_MODULE_INTERRUPTS,
+ .control_offset = TWL4030_INTERRUPTS_BCISIHCTRL,
+ .bits = 12,
+ .bytes_ixr = 2,
+ .edr_offset = TWL4030_INTERRUPTS_BCIEDR1,
+ /* Note: most of these IRQs default to no-trigger */
+ .bytes_edr = 3,
+ .mask = { {
+ .isr_offset = TWL4030_INTERRUPTS_BCIISR1A,
+ .imr_offset = TWL4030_INTERRUPTS_BCIIMR1A,
+ }, {
+ .isr_offset = TWL4030_INTERRUPTS_BCIISR1B,
+ .imr_offset = TWL4030_INTERRUPTS_BCIIMR1B,
+ }, },
+ },
+ [3] = {
+ .name = "madc",
+ SIH_INITIALIZER(MADC, 4)
+ },
+ [4] = {
+ /* USB doesn't use the same SIH organization */
+ .name = "usb",
+ },
+ [5] = {
+ .name = "power",
+ .set_cor = true,
+ SIH_INITIALIZER(INT_PWR, 8)
+ },
+ /* there are no SIH modules #6 or #7 ... */
+};
+
+#undef TWL4030_MODULE_KEYPAD_KEYP
+#undef TWL4030_MODULE_INT_PWR
+#undef TWL4030_INT_PWR_EDR
+
+/*----------------------------------------------------------------------*/
+
+static unsigned twl4030_irq_base;
+
+static struct completion irq_event;
+
+/*
+ * This thread processes interrupts reported by the Primary Interrupt Handler.
+ */
+static int twl4030_irq_thread(void *data)
+{
+ long irq = (long)data;
+ irq_desc_t *desc = irq_desc + irq;
+ static unsigned i2c_errors;
+ const static unsigned max_i2c_errors = 100;
+
+ current->flags |= PF_NOFREEZE;
+
+ while (!kthread_should_stop()) {
+ int ret;
+ int module_irq;
+ u8 pih_isr;
+
+ /* Wait for IRQ, then read PIH irq status (also blocking) */
+ wait_for_completion_interruptible(&irq_event);
+
+ ret = twl4030_i2c_read_u8(TWL4030_MODULE_PIH, &pih_isr,
+ REG_PIH_ISR_P1);
+ if (ret) {
+ pr_warning("twl4030: I2C error %d reading PIH ISR\n",
+ ret);
+ if (++i2c_errors >= max_i2c_errors) {
+ printk(KERN_ERR "Maximum I2C error count"
+ " exceeded. Terminating %s.\n",
+ __func__);
+ break;
+ }
+ complete(&irq_event);
+ continue;
+ }
+
+ /* these handlers deal with the relevant SIH irq status */
+ local_irq_disable();
+ for (module_irq = twl4030_irq_base;
+ pih_isr;
+ pih_isr >>= 1, module_irq++) {
+ if (pih_isr & 0x1) {
+ irq_desc_t *d = irq_desc + module_irq;
+
+ /* These can't be masked ... always warn
+ * if we get any surprises.
+ */
+ if (d->status & IRQ_DISABLED)
+ note_interrupt(module_irq, d,
+ IRQ_NONE);
+ else
+ d->handle_irq(module_irq, d);
+ }
+ }
+ local_irq_enable();
+
+ desc->chip->unmask(irq);
+ }
+
+ return 0;
+}
+
+/*
+ * handle_twl4030_pih() is the desc->handle method for the twl4030 interrupt.
+ * This is a chained interrupt, so there is no desc->action method for it.
+ * Now we need to query the interrupt controller in the twl4030 to determine
+ * which module is generating the interrupt request. However, we can't do i2c
+ * transactions in interrupt context, so we must defer that work to a kernel
+ * thread. All we do here is acknowledge and mask the interrupt and wakeup
+ * the kernel thread.
+ */
+static void handle_twl4030_pih(unsigned int irq, irq_desc_t *desc)
+{
+ /* Acknowledge, clear *AND* mask the interrupt... */
+ desc->chip->ack(irq);
+ complete(&irq_event);
+}
+
+static struct task_struct *start_twl4030_irq_thread(long irq)
+{
+ struct task_struct *thread;
+
+ init_completion(&irq_event);
+ thread = kthread_run(twl4030_irq_thread, (void *)irq, "twl4030-irq");
+ if (!thread)
+ pr_err("twl4030: could not create irq %ld thread!\n", irq);
+
+ return thread;
+}
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * twl4030_init_sih_modules() ... start from a known state where no
+ * IRQs will be coming in, and where we can quickly enable them then
+ * handle them as they arrive. Mask all IRQs: maybe init SIH_CTRL.
+ *
+ * NOTE: we don't touch EDR registers here; they stay with hardware
+ * defaults or whatever the last value was. Note that when both EDR
+ * bits for an IRQ are clear, that's as if its IMR bit is set...
+ */
+static int twl4030_init_sih_modules(unsigned line)
+{
+ const struct sih *sih;
+ u8 buf[4];
+ int i;
+ int status;
+
+ /* line 0 == int1_n signal; line 1 == int2_n signal */
+ if (line > 1)
+ return -EINVAL;
+
+ irq_line = line;
+
+ /* disable all interrupts on our line */
+ memset(buf, 0xff, sizeof buf);
+ sih = sih_modules;
+ for (i = 0; i < ARRAY_SIZE(sih_modules); i++, sih++) {
+
+ /* skip USB -- it's funky */
+ if (!sih->bytes_ixr)
+ continue;
+
+ status = twl4030_i2c_write(sih->module, buf,
+ sih->mask[line].imr_offset, sih->bytes_ixr);
+ if (status < 0)
+ pr_err("twl4030: err %d initializing %s %s\n",
+ status, sih->name, "IMR");
+
+ /* Maybe disable "exclusive" mode; buffer second pending irq;
+ * set Clear-On-Read (COR) bit.
+ *
+ * NOTE that sometimes COR polarity is documented as being
+ * inverted: for MADC and BCI, COR=1 means "clear on write".
+ * And for PWR_INT it's not documented...
+ */
+ if (sih->set_cor) {
+ status = twl4030_i2c_write_u8(sih->module,
+ TWL4030_SIH_CTRL_COR_MASK,
+ sih->control_offset);
+ if (status < 0)
+ pr_err("twl4030: err %d initializing %s %s\n",
+ status, sih->name, "SIH_CTRL");
+ }
+ }
+
+ sih = sih_modules;
+ for (i = 0; i < ARRAY_SIZE(sih_modules); i++, sih++) {
+ u8 rxbuf[4];
+ int j;
+
+ /* skip USB */
+ if (!sih->bytes_ixr)
+ continue;
+
+ /* Clear pending interrupt status. Either the read was
+ * enough, or we need to write those bits. Repeat, in
+ * case an IRQ is pending (PENDDIS=0) ... that's not
+ * uncommon with PWR_INT.PWRON.
+ */
+ for (j = 0; j < 2; j++) {
+ status = twl4030_i2c_read(sih->module, rxbuf,
+ sih->mask[line].isr_offset, sih->bytes_ixr);
+ if (status < 0)
+ pr_err("twl4030: err %d initializing %s %s\n",
+ status, sih->name, "ISR");
+
+ if (!sih->set_cor)
+ status = twl4030_i2c_write(sih->module, buf,
+ sih->mask[line].isr_offset,
+ sih->bytes_ixr);
+ /* else COR=1 means read sufficed.
+ * (for most SIH modules...)
+ */
+ }
+ }
+
+ return 0;
+}
+
+static inline void activate_irq(int irq)
+{
+#ifdef CONFIG_ARM
+ /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
+ * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
+ */
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ /* same effect on other architectures */
+ set_irq_noprobe(irq);
+#endif
+}
+
+/*----------------------------------------------------------------------*/
+
+static DEFINE_SPINLOCK(sih_agent_lock);
+
+static struct workqueue_struct *wq;
+
+struct sih_agent {
+ int irq_base;
+ const struct sih *sih;
+
+ u32 imr;
+ bool imr_change_pending;
+ struct work_struct mask_work;
+
+ u32 edge_change;
+ struct work_struct edge_work;
+};
+
+static void twl4030_sih_do_mask(struct work_struct *work)
+{
+ struct sih_agent *agent;
+ const struct sih *sih;
+ union {
+ u8 bytes[4];
+ u32 word;
+ } imr;
+ int status;
+
+ agent = container_of(work, struct sih_agent, mask_work);
+
+ /* see what work we have */
+ spin_lock_irq(&sih_agent_lock);
+ if (agent->imr_change_pending) {
+ sih = agent->sih;
+ /* byte[0] gets overwritten as we write ... */
+ imr.word = cpu_to_le32(agent->imr << 8);
+ agent->imr_change_pending = false;
+ } else
+ sih = NULL;
+ spin_unlock_irq(&sih_agent_lock);
+ if (!sih)
+ return;
+
+ /* write the whole mask ... simpler than subsetting it */
+ status = twl4030_i2c_write(sih->module, imr.bytes,
+ sih->mask[irq_line].imr_offset, sih->bytes_ixr);
+ if (status)
+ pr_err("twl4030: %s, %s --> %d\n", __func__,
+ "write", status);
+}
+
+static void twl4030_sih_do_edge(struct work_struct *work)
+{
+ struct sih_agent *agent;
+ const struct sih *sih;
+ u8 bytes[6];
+ u32 edge_change;
+ int status;
+
+ agent = container_of(work, struct sih_agent, edge_work);
+
+ /* see what work we have */
+ spin_lock_irq(&sih_agent_lock);
+ edge_change = agent->edge_change;
+ agent->edge_change = 0;;
+ sih = edge_change ? agent->sih : NULL;
+ spin_unlock_irq(&sih_agent_lock);
+ if (!sih)
+ return;
+
+ /* Read, reserving first byte for write scratch. Yes, this
+ * could be cached for some speedup ... but be careful about
+ * any processor on the other IRQ line, EDR registers are
+ * shared.
+ */
+ status = twl4030_i2c_read(sih->module, bytes + 1,
+ sih->edr_offset, sih->bytes_edr);
+ if (status) {
+ pr_err("twl4030: %s, %s --> %d\n", __func__,
+ "read", status);
+ return;
+ }
+
+ /* Modify only the bits we know must change */
+ while (edge_change) {
+ int i = fls(edge_change) - 1;
+ struct irq_desc *d = irq_desc + i + agent->irq_base;
+ int byte = 1 + (i >> 2);
+ int off = (i & 0x3) * 2;
+
+ bytes[byte] &= ~(0x03 << off);
+
+ spin_lock_irq(&d->lock);
+ if (d->status & IRQ_TYPE_EDGE_RISING)
+ bytes[byte] |= BIT(off + 1);
+ if (d->status & IRQ_TYPE_EDGE_FALLING)
+ bytes[byte] |= BIT(off + 0);
+ spin_unlock_irq(&d->lock);
+
+ edge_change &= ~BIT(i);
+ }
+
+ /* Write */
+ status = twl4030_i2c_write(sih->module, bytes,
+ sih->edr_offset, sih->bytes_edr);
+ if (status)
+ pr_err("twl4030: %s, %s --> %d\n", __func__,
+ "write", status);
+}
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * All irq_chip methods get issued from code holding irq_desc[irq].lock,
+ * which can't perform the underlying I2C operations (because they sleep).
+ * So we must hand them off to a thread (workqueue) and cope with asynch
+ * completion, potentially including some re-ordering, of these requests.
+ */
+
+static void twl4030_sih_mask(unsigned irq)
+{
+ struct sih_agent *sih = get_irq_chip_data(irq);
+ unsigned long flags;
+
+ spin_lock_irqsave(&sih_agent_lock, flags);
+ sih->imr |= BIT(irq - sih->irq_base);
+ sih->imr_change_pending = true;
+ queue_work(wq, &sih->mask_work);
+ spin_unlock_irqrestore(&sih_agent_lock, flags);
+}
+
+static void twl4030_sih_unmask(unsigned irq)
+{
+ struct sih_agent *sih = get_irq_chip_data(irq);
+ unsigned long flags;
+
+ spin_lock_irqsave(&sih_agent_lock, flags);
+ sih->imr &= ~BIT(irq - sih->irq_base);
+ sih->imr_change_pending = true;
+ queue_work(wq, &sih->mask_work);
+ spin_unlock_irqrestore(&sih_agent_lock, flags);
+}
+
+static int twl4030_sih_set_type(unsigned irq, unsigned trigger)
+{
+ struct sih_agent *sih = get_irq_chip_data(irq);
+ struct irq_desc *desc = irq_desc + irq;
+ unsigned long flags;
+
+ if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+ return -EINVAL;
+
+ spin_lock_irqsave(&sih_agent_lock, flags);
+ if ((desc->status & IRQ_TYPE_SENSE_MASK) != trigger) {
+ desc->status &= ~IRQ_TYPE_SENSE_MASK;
+ desc->status |= trigger;
+ sih->edge_change |= BIT(irq - sih->irq_base);
+ queue_work(wq, &sih->edge_work);
+ }
+ spin_unlock_irqrestore(&sih_agent_lock, flags);
+ return 0;
+}
+
+static struct irq_chip twl4030_sih_irq_chip = {
+ .name = "twl4030",
+ .mask = twl4030_sih_mask,
+ .unmask = twl4030_sih_unmask,
+ .set_type = twl4030_sih_set_type,
+};
+
+/*----------------------------------------------------------------------*/
+
+static inline int sih_read_isr(const struct sih *sih)
+{
+ int status;
+ union {
+ u8 bytes[4];
+ u32 word;
+ } isr;
+
+ /* FIXME need retry-on-error ... */
+
+ isr.word = 0;
+ status = twl4030_i2c_read(sih->module, isr.bytes,
+ sih->mask[irq_line].isr_offset, sih->bytes_ixr);
+
+ return (status < 0) ? status : le32_to_cpu(isr.word);
+}
+
+/*
+ * Generic handler for SIH interrupts ... we "know" this is called
+ * in task context, with IRQs enabled.
+ */
+static void handle_twl4030_sih(unsigned irq, struct irq_desc *desc)
+{
+ struct sih_agent *agent = get_irq_data(irq);
+ const struct sih *sih = agent->sih;
+ int isr;
+
+ /* reading ISR acks the IRQs, using clear-on-read mode */
+ local_irq_enable();
+ isr = sih_read_isr(sih);
+ local_irq_disable();
+
+ if (isr < 0) {
+ pr_err("twl4030: %s SIH, read ISR error %d\n",
+ sih->name, isr);
+ /* REVISIT: recover; eventually mask it all, etc */
+ return;
+ }
+
+ while (isr) {
+ irq = fls(isr);
+ irq--;
+ isr &= ~BIT(irq);
+
+ if (irq < sih->bits)
+ generic_handle_irq(agent->irq_base + irq);
+ else
+ pr_err("twl4030: %s SIH, invalid ISR bit %d\n",
+ sih->name, irq);
+ }
+}
+
+static unsigned twl4030_irq_next;
+
+/* returns the first IRQ used by this SIH bank,
+ * or negative errno
+ */
+int twl4030_sih_setup(int module)
+{
+ int sih_mod;
+ const struct sih *sih = NULL;
+ struct sih_agent *agent;
+ int i, irq;
+ int status = -EINVAL;
+ unsigned irq_base = twl4030_irq_next;
+
+ /* only support modules with standard clear-on-read for now */
+ for (sih_mod = 0, sih = sih_modules;
+ sih_mod < ARRAY_SIZE(sih_modules);
+ sih_mod++, sih++) {
+ if (sih->module == module && sih->set_cor) {
+ if (!WARN((irq_base + sih->bits) > NR_IRQS,
+ "irq %d for %s too big\n",
+ irq_base + sih->bits,
+ sih->name))
+ status = 0;
+ break;
+ }
+ }
+ if (status < 0)
+ return status;
+
+ agent = kzalloc(sizeof *agent, GFP_KERNEL);
+ if (!agent)
+ return -ENOMEM;
+
+ status = 0;
+
+ agent->irq_base = irq_base;
+ agent->sih = sih;
+ agent->imr = ~0;
+ INIT_WORK(&agent->mask_work, twl4030_sih_do_mask);
+ INIT_WORK(&agent->edge_work, twl4030_sih_do_edge);
+
+ for (i = 0; i < sih->bits; i++) {
+ irq = irq_base + i;
+
+ set_irq_chip_and_handler(irq, &twl4030_sih_irq_chip,
+ handle_edge_irq);
+ set_irq_chip_data(irq, agent);
+ activate_irq(irq);
+ }
+
+ status = irq_base;
+ twl4030_irq_next += i;
+
+ /* replace generic PIH handler (handle_simple_irq) */
+ irq = sih_mod + twl4030_irq_base;
+ set_irq_data(irq, agent);
+ set_irq_chained_handler(irq, handle_twl4030_sih);
+
+ pr_info("twl4030: %s (irq %d) chaining IRQs %d..%d\n", sih->name,
+ irq, irq_base, twl4030_irq_next - 1);
+
+ return status;
+}
+
+/* FIXME need a call to reverse twl4030_sih_setup() ... */
+
+
+/*----------------------------------------------------------------------*/
+
+/* FIXME pass in which interrupt line we'll use ... */
+#define twl_irq_line 0
+
+int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end)
+{
+ static struct irq_chip twl4030_irq_chip;
+
+ int status;
+ int i;
+ struct task_struct *task;
+
+ /*
+ * Mask and clear all TWL4030 interrupts since initially we do
+ * not have any TWL4030 module interrupt handlers present
+ */
+ status = twl4030_init_sih_modules(twl_irq_line);
+ if (status < 0)
+ return status;
+
+ wq = create_singlethread_workqueue("twl4030-irqchip");
+ if (!wq) {
+ pr_err("twl4030: workqueue FAIL\n");
+ return -ESRCH;
+ }
+
+ twl4030_irq_base = irq_base;
+
+ /* install an irq handler for each of the SIH modules;
+ * clone dummy irq_chip since PIH can't *do* anything
+ */
+ twl4030_irq_chip = dummy_irq_chip;
+ twl4030_irq_chip.name = "twl4030";
+
+ twl4030_sih_irq_chip.ack = dummy_irq_chip.ack;
+
+ for (i = irq_base; i < irq_end; i++) {
+ set_irq_chip_and_handler(i, &twl4030_irq_chip,
+ handle_simple_irq);
+ activate_irq(i);
+ }
+ twl4030_irq_next = i;
+ pr_info("twl4030: %s (irq %d) chaining IRQs %d..%d\n", "PIH",
+ irq_num, irq_base, twl4030_irq_next - 1);
+
+ /* ... and the PWR_INT module ... */
+ status = twl4030_sih_setup(TWL4030_MODULE_INT);
+ if (status < 0) {
+ pr_err("twl4030: sih_setup PWR INT --> %d\n", status);
+ goto fail;
+ }
+
+ /* install an irq handler to demultiplex the TWL4030 interrupt */
+ task = start_twl4030_irq_thread(irq_num);
+ if (!task) {
+ pr_err("twl4030: irq thread FAIL\n");
+ status = -ESRCH;
+ goto fail;
+ }
+
+ set_irq_data(irq_num, task);
+ set_irq_chained_handler(irq_num, handle_twl4030_pih);
+
+ return status;
+
+fail:
+ for (i = irq_base; i < irq_end; i++)
+ set_irq_chip_and_handler(i, NULL, NULL);
+ destroy_workqueue(wq);
+ wq = NULL;
+ return status;
+}
+
+int twl_exit_irq(void)
+{
+ /* FIXME undo twl_init_irq() */
+ if (twl4030_irq_base) {
+ pr_err("twl4030: can't yet clean up IRQs?\n");
+ return -ENOSYS;
+ }
+ return 0;
+}
(wm8350->reg_cache[i] & ~wm8350_reg_io_map[i].writable)
| src[i - reg];
+ /* Don't store volatile bits */
+ wm8350->reg_cache[i] &= ~wm8350_reg_io_map[i].vol;
+
src[i - reg] = cpu_to_be16(src[i - reg]);
}
}
value = be16_to_cpu(value);
value &= wm8350_reg_io_map[i].readable;
+ value &= ~wm8350_reg_io_map[i].vol;
wm8350->reg_cache[i] = value;
} else
wm8350->reg_cache[i] = reg_map[i];
out:
return ret;
}
-EXPORT_SYMBOL_GPL(wm8350_create_cache);
/*
* Register a client device. This is non-fatal since there is no need to
platforms. The support is integrated with the rest of
the Menelaus driver; it's not separate module.
+config RTC_DRV_TWL4030
+ tristate "TI TWL4030/TWL5030/TPS659x0"
+ depends on RTC_CLASS && TWL4030_CORE
+ help
+ If you say yes here you get support for the RTC on the
+ TWL4030 family chips, used mostly with OMAP3 platforms.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-twl4030.
+
config RTC_DRV_S35390A
tristate "Seiko Instruments S-35390A"
select BITREVERSE
obj-$(CONFIG_RTC_DRV_SH) += rtc-sh.o
obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o
obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o
+obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl4030.o
obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
--- /dev/null
+/*
+ * rtc-twl4030.c -- TWL4030 Real Time Clock interface
+ *
+ * Copyright (C) 2007 MontaVista Software, Inc
+ * Author: Alexandre Rusev <source@mvista.com>
+ *
+ * Based on original TI driver twl4030-rtc.c
+ * Copyright (C) 2006 Texas Instruments, Inc.
+ *
+ * Based on rtc-omap.c
+ * Copyright (C) 2003 MontaVista Software, Inc.
+ * Author: George G. Davis <gdavis@mvista.com> or <source@mvista.com>
+ * Copyright (C) 2006 David Brownell
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/rtc.h>
+#include <linux/bcd.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+
+#include <linux/i2c/twl4030.h>
+
+
+/*
+ * RTC block register offsets (use TWL_MODULE_RTC)
+ */
+#define REG_SECONDS_REG 0x00
+#define REG_MINUTES_REG 0x01
+#define REG_HOURS_REG 0x02
+#define REG_DAYS_REG 0x03
+#define REG_MONTHS_REG 0x04
+#define REG_YEARS_REG 0x05
+#define REG_WEEKS_REG 0x06
+
+#define REG_ALARM_SECONDS_REG 0x07
+#define REG_ALARM_MINUTES_REG 0x08
+#define REG_ALARM_HOURS_REG 0x09
+#define REG_ALARM_DAYS_REG 0x0A
+#define REG_ALARM_MONTHS_REG 0x0B
+#define REG_ALARM_YEARS_REG 0x0C
+
+#define REG_RTC_CTRL_REG 0x0D
+#define REG_RTC_STATUS_REG 0x0E
+#define REG_RTC_INTERRUPTS_REG 0x0F
+
+#define REG_RTC_COMP_LSB_REG 0x10
+#define REG_RTC_COMP_MSB_REG 0x11
+
+/* RTC_CTRL_REG bitfields */
+#define BIT_RTC_CTRL_REG_STOP_RTC_M 0x01
+#define BIT_RTC_CTRL_REG_ROUND_30S_M 0x02
+#define BIT_RTC_CTRL_REG_AUTO_COMP_M 0x04
+#define BIT_RTC_CTRL_REG_MODE_12_24_M 0x08
+#define BIT_RTC_CTRL_REG_TEST_MODE_M 0x10
+#define BIT_RTC_CTRL_REG_SET_32_COUNTER_M 0x20
+#define BIT_RTC_CTRL_REG_GET_TIME_M 0x40
+
+/* RTC_STATUS_REG bitfields */
+#define BIT_RTC_STATUS_REG_RUN_M 0x02
+#define BIT_RTC_STATUS_REG_1S_EVENT_M 0x04
+#define BIT_RTC_STATUS_REG_1M_EVENT_M 0x08
+#define BIT_RTC_STATUS_REG_1H_EVENT_M 0x10
+#define BIT_RTC_STATUS_REG_1D_EVENT_M 0x20
+#define BIT_RTC_STATUS_REG_ALARM_M 0x40
+#define BIT_RTC_STATUS_REG_POWER_UP_M 0x80
+
+/* RTC_INTERRUPTS_REG bitfields */
+#define BIT_RTC_INTERRUPTS_REG_EVERY_M 0x03
+#define BIT_RTC_INTERRUPTS_REG_IT_TIMER_M 0x04
+#define BIT_RTC_INTERRUPTS_REG_IT_ALARM_M 0x08
+
+
+/* REG_SECONDS_REG through REG_YEARS_REG is how many registers? */
+#define ALL_TIME_REGS 6
+
+/*----------------------------------------------------------------------*/
+
+/*
+ * Supports 1 byte read from TWL4030 RTC register.
+ */
+static int twl4030_rtc_read_u8(u8 *data, u8 reg)
+{
+ int ret;
+
+ ret = twl4030_i2c_read_u8(TWL4030_MODULE_RTC, data, reg);
+ if (ret < 0)
+ pr_err("twl4030_rtc: Could not read TWL4030"
+ "register %X - error %d\n", reg, ret);
+ return ret;
+}
+
+/*
+ * Supports 1 byte write to TWL4030 RTC registers.
+ */
+static int twl4030_rtc_write_u8(u8 data, u8 reg)
+{
+ int ret;
+
+ ret = twl4030_i2c_write_u8(TWL4030_MODULE_RTC, data, reg);
+ if (ret < 0)
+ pr_err("twl4030_rtc: Could not write TWL4030"
+ "register %X - error %d\n", reg, ret);
+ return ret;
+}
+
+/*
+ * Cache the value for timer/alarm interrupts register; this is
+ * only changed by callers holding rtc ops lock (or resume).
+ */
+static unsigned char rtc_irq_bits;
+
+/*
+ * Enable timer and/or alarm interrupts.
+ */
+static int set_rtc_irq_bit(unsigned char bit)
+{
+ unsigned char val;
+ int ret;
+
+ val = rtc_irq_bits | bit;
+ ret = twl4030_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG);
+ if (ret == 0)
+ rtc_irq_bits = val;
+
+ return ret;
+}
+
+/*
+ * Disable timer and/or alarm interrupts.
+ */
+static int mask_rtc_irq_bit(unsigned char bit)
+{
+ unsigned char val;
+ int ret;
+
+ val = rtc_irq_bits & ~bit;
+ ret = twl4030_rtc_write_u8(val, REG_RTC_INTERRUPTS_REG);
+ if (ret == 0)
+ rtc_irq_bits = val;
+
+ return ret;
+}
+
+static inline int twl4030_rtc_alarm_irq_set_state(int enabled)
+{
+ int ret;
+
+ if (enabled)
+ ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ else
+ ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+
+ return ret;
+}
+
+static inline int twl4030_rtc_irq_set_state(int enabled)
+{
+ int ret;
+
+ if (enabled)
+ ret = set_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+ else
+ ret = mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+
+ return ret;
+}
+
+/*
+ * Gets current TWL4030 RTC time and date parameters.
+ *
+ * The RTC's time/alarm representation is not what gmtime(3) requires
+ * Linux to use:
+ *
+ * - Months are 1..12 vs Linux 0-11
+ * - Years are 0..99 vs Linux 1900..N (we assume 21st century)
+ */
+static int twl4030_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ unsigned char rtc_data[ALL_TIME_REGS + 1];
+ int ret;
+ u8 save_control;
+
+ ret = twl4030_rtc_read_u8(&save_control, REG_RTC_CTRL_REG);
+ if (ret < 0)
+ return ret;
+
+ save_control |= BIT_RTC_CTRL_REG_GET_TIME_M;
+
+ ret = twl4030_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+ if (ret < 0)
+ return ret;
+
+ ret = twl4030_i2c_read(TWL4030_MODULE_RTC, rtc_data,
+ REG_SECONDS_REG, ALL_TIME_REGS);
+
+ if (ret < 0) {
+ dev_err(dev, "rtc_read_time error %d\n", ret);
+ return ret;
+ }
+
+ tm->tm_sec = bcd2bin(rtc_data[0]);
+ tm->tm_min = bcd2bin(rtc_data[1]);
+ tm->tm_hour = bcd2bin(rtc_data[2]);
+ tm->tm_mday = bcd2bin(rtc_data[3]);
+ tm->tm_mon = bcd2bin(rtc_data[4]) - 1;
+ tm->tm_year = bcd2bin(rtc_data[5]) + 100;
+
+ return ret;
+}
+
+static int twl4030_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ unsigned char save_control;
+ unsigned char rtc_data[ALL_TIME_REGS + 1];
+ int ret;
+
+ rtc_data[1] = bin2bcd(tm->tm_sec);
+ rtc_data[2] = bin2bcd(tm->tm_min);
+ rtc_data[3] = bin2bcd(tm->tm_hour);
+ rtc_data[4] = bin2bcd(tm->tm_mday);
+ rtc_data[5] = bin2bcd(tm->tm_mon + 1);
+ rtc_data[6] = bin2bcd(tm->tm_year - 100);
+
+ /* Stop RTC while updating the TC registers */
+ ret = twl4030_rtc_read_u8(&save_control, REG_RTC_CTRL_REG);
+ if (ret < 0)
+ goto out;
+
+ save_control &= ~BIT_RTC_CTRL_REG_STOP_RTC_M;
+ twl4030_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+ if (ret < 0)
+ goto out;
+
+ /* update all the time registers in one shot */
+ ret = twl4030_i2c_write(TWL4030_MODULE_RTC, rtc_data,
+ REG_SECONDS_REG, ALL_TIME_REGS);
+ if (ret < 0) {
+ dev_err(dev, "rtc_set_time error %d\n", ret);
+ goto out;
+ }
+
+ /* Start back RTC */
+ save_control |= BIT_RTC_CTRL_REG_STOP_RTC_M;
+ ret = twl4030_rtc_write_u8(save_control, REG_RTC_CTRL_REG);
+
+out:
+ return ret;
+}
+
+/*
+ * Gets current TWL4030 RTC alarm time.
+ */
+static int twl4030_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ unsigned char rtc_data[ALL_TIME_REGS + 1];
+ int ret;
+
+ ret = twl4030_i2c_read(TWL4030_MODULE_RTC, rtc_data,
+ REG_ALARM_SECONDS_REG, ALL_TIME_REGS);
+ if (ret < 0) {
+ dev_err(dev, "rtc_read_alarm error %d\n", ret);
+ return ret;
+ }
+
+ /* some of these fields may be wildcard/"match all" */
+ alm->time.tm_sec = bcd2bin(rtc_data[0]);
+ alm->time.tm_min = bcd2bin(rtc_data[1]);
+ alm->time.tm_hour = bcd2bin(rtc_data[2]);
+ alm->time.tm_mday = bcd2bin(rtc_data[3]);
+ alm->time.tm_mon = bcd2bin(rtc_data[4]) - 1;
+ alm->time.tm_year = bcd2bin(rtc_data[5]) + 100;
+
+ /* report cached alarm enable state */
+ if (rtc_irq_bits & BIT_RTC_INTERRUPTS_REG_IT_ALARM_M)
+ alm->enabled = 1;
+
+ return ret;
+}
+
+static int twl4030_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ unsigned char alarm_data[ALL_TIME_REGS + 1];
+ int ret;
+
+ ret = twl4030_rtc_alarm_irq_set_state(0);
+ if (ret)
+ goto out;
+
+ alarm_data[1] = bin2bcd(alm->time.tm_sec);
+ alarm_data[2] = bin2bcd(alm->time.tm_min);
+ alarm_data[3] = bin2bcd(alm->time.tm_hour);
+ alarm_data[4] = bin2bcd(alm->time.tm_mday);
+ alarm_data[5] = bin2bcd(alm->time.tm_mon + 1);
+ alarm_data[6] = bin2bcd(alm->time.tm_year - 100);
+
+ /* update all the alarm registers in one shot */
+ ret = twl4030_i2c_write(TWL4030_MODULE_RTC, alarm_data,
+ REG_ALARM_SECONDS_REG, ALL_TIME_REGS);
+ if (ret) {
+ dev_err(dev, "rtc_set_alarm error %d\n", ret);
+ goto out;
+ }
+
+ if (alm->enabled)
+ ret = twl4030_rtc_alarm_irq_set_state(1);
+out:
+ return ret;
+}
+
+#ifdef CONFIG_RTC_INTF_DEV
+
+static int twl4030_rtc_ioctl(struct device *dev, unsigned int cmd,
+ unsigned long arg)
+{
+ switch (cmd) {
+ case RTC_AIE_OFF:
+ return twl4030_rtc_alarm_irq_set_state(0);
+ case RTC_AIE_ON:
+ return twl4030_rtc_alarm_irq_set_state(1);
+ case RTC_UIE_OFF:
+ return twl4030_rtc_irq_set_state(0);
+ case RTC_UIE_ON:
+ return twl4030_rtc_irq_set_state(1);
+
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+#else
+#define omap_rtc_ioctl NULL
+#endif
+
+static irqreturn_t twl4030_rtc_interrupt(int irq, void *rtc)
+{
+ unsigned long events = 0;
+ int ret = IRQ_NONE;
+ int res;
+ u8 rd_reg;
+
+#ifdef CONFIG_LOCKDEP
+ /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
+ * we don't want and can't tolerate. Although it might be
+ * friendlier not to borrow this thread context...
+ */
+ local_irq_enable();
+#endif
+
+ res = twl4030_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG);
+ if (res)
+ goto out;
+ /*
+ * Figure out source of interrupt: ALARM or TIMER in RTC_STATUS_REG.
+ * only one (ALARM or RTC) interrupt source may be enabled
+ * at time, we also could check our results
+ * by reading RTS_INTERRUPTS_REGISTER[IT_TIMER,IT_ALARM]
+ */
+ if (rd_reg & BIT_RTC_STATUS_REG_ALARM_M)
+ events |= RTC_IRQF | RTC_AF;
+ else
+ events |= RTC_IRQF | RTC_UF;
+
+ res = twl4030_rtc_write_u8(rd_reg | BIT_RTC_STATUS_REG_ALARM_M,
+ REG_RTC_STATUS_REG);
+ if (res)
+ goto out;
+
+ /* Clear on Read enabled. RTC_IT bit of TWL4030_INT_PWR_ISR1
+ * needs 2 reads to clear the interrupt. One read is done in
+ * do_twl4030_pwrirq(). Doing the second read, to clear
+ * the bit.
+ *
+ * FIXME the reason PWR_ISR1 needs an extra read is that
+ * RTC_IF retriggered until we cleared REG_ALARM_M above.
+ * But re-reading like this is a bad hack; by doing so we
+ * risk wrongly clearing status for some other IRQ (losing
+ * the interrupt). Be smarter about handling RTC_UF ...
+ */
+ res = twl4030_i2c_read_u8(TWL4030_MODULE_INT,
+ &rd_reg, TWL4030_INT_PWR_ISR1);
+ if (res)
+ goto out;
+
+ /* Notify RTC core on event */
+ rtc_update_irq(rtc, 1, events);
+
+ ret = IRQ_HANDLED;
+out:
+ return ret;
+}
+
+static struct rtc_class_ops twl4030_rtc_ops = {
+ .ioctl = twl4030_rtc_ioctl,
+ .read_time = twl4030_rtc_read_time,
+ .set_time = twl4030_rtc_set_time,
+ .read_alarm = twl4030_rtc_read_alarm,
+ .set_alarm = twl4030_rtc_set_alarm,
+};
+
+/*----------------------------------------------------------------------*/
+
+static int __devinit twl4030_rtc_probe(struct platform_device *pdev)
+{
+ struct rtc_device *rtc;
+ int ret = 0;
+ int irq = platform_get_irq(pdev, 0);
+ u8 rd_reg;
+
+ if (irq < 0)
+ return irq;
+
+ rtc = rtc_device_register(pdev->name,
+ &pdev->dev, &twl4030_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc)) {
+ ret = -EINVAL;
+ dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
+ PTR_ERR(rtc));
+ goto out0;
+
+ }
+
+ platform_set_drvdata(pdev, rtc);
+
+ ret = twl4030_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG);
+
+ if (ret < 0)
+ goto out1;
+
+ if (rd_reg & BIT_RTC_STATUS_REG_POWER_UP_M)
+ dev_warn(&pdev->dev, "Power up reset detected.\n");
+
+ if (rd_reg & BIT_RTC_STATUS_REG_ALARM_M)
+ dev_warn(&pdev->dev, "Pending Alarm interrupt detected.\n");
+
+ /* Clear RTC Power up reset and pending alarm interrupts */
+ ret = twl4030_rtc_write_u8(rd_reg, REG_RTC_STATUS_REG);
+ if (ret < 0)
+ goto out1;
+
+ ret = request_irq(irq, twl4030_rtc_interrupt,
+ IRQF_TRIGGER_RISING,
+ rtc->dev.bus_id, rtc);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "IRQ is not free.\n");
+ goto out1;
+ }
+
+ /* Check RTC module status, Enable if it is off */
+ ret = twl4030_rtc_read_u8(&rd_reg, REG_RTC_CTRL_REG);
+ if (ret < 0)
+ goto out2;
+
+ if (!(rd_reg & BIT_RTC_CTRL_REG_STOP_RTC_M)) {
+ dev_info(&pdev->dev, "Enabling TWL4030-RTC.\n");
+ rd_reg = BIT_RTC_CTRL_REG_STOP_RTC_M;
+ ret = twl4030_rtc_write_u8(rd_reg, REG_RTC_CTRL_REG);
+ if (ret < 0)
+ goto out2;
+ }
+
+ /* init cached IRQ enable bits */
+ ret = twl4030_rtc_read_u8(&rtc_irq_bits, REG_RTC_INTERRUPTS_REG);
+ if (ret < 0)
+ goto out2;
+
+ return ret;
+
+
+out2:
+ free_irq(irq, rtc);
+out1:
+ rtc_device_unregister(rtc);
+out0:
+ return ret;
+}
+
+/*
+ * Disable all TWL4030 RTC module interrupts.
+ * Sets status flag to free.
+ */
+static int __devexit twl4030_rtc_remove(struct platform_device *pdev)
+{
+ /* leave rtc running, but disable irqs */
+ struct rtc_device *rtc = platform_get_drvdata(pdev);
+ int irq = platform_get_irq(pdev, 0);
+
+ mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
+
+ free_irq(irq, rtc);
+
+ rtc_device_unregister(rtc);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static void twl4030_rtc_shutdown(struct platform_device *pdev)
+{
+ mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M |
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+}
+
+#ifdef CONFIG_PM
+
+static unsigned char irqstat;
+
+static int twl4030_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ irqstat = rtc_irq_bits;
+
+ /* REVISIT alarm may need to wake us from sleep */
+ mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M |
+ BIT_RTC_INTERRUPTS_REG_IT_ALARM_M);
+ return 0;
+}
+
+static int twl4030_rtc_resume(struct platform_device *pdev)
+{
+ set_rtc_irq_bit(irqstat);
+ return 0;
+}
+
+#else
+#define twl4030_rtc_suspend NULL
+#define twl4030_rtc_resume NULL
+#endif
+
+MODULE_ALIAS("platform:twl4030_rtc");
+
+static struct platform_driver twl4030rtc_driver = {
+ .probe = twl4030_rtc_probe,
+ .remove = __devexit_p(twl4030_rtc_remove),
+ .shutdown = twl4030_rtc_shutdown,
+ .suspend = twl4030_rtc_suspend,
+ .resume = twl4030_rtc_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "twl4030_rtc",
+ },
+};
+
+static int __init twl4030_rtc_init(void)
+{
+ return platform_driver_register(&twl4030rtc_driver);
+}
+module_init(twl4030_rtc_init);
+
+static void __exit twl4030_rtc_exit(void)
+{
+ platform_driver_unregister(&twl4030rtc_driver);
+}
+module_exit(twl4030_rtc_exit);
+
+MODULE_AUTHOR("Texas Instruments, MontaVista Software");
+MODULE_LICENSE("GPL");
int gpio_base;
unsigned irq_base, irq_end;
+ /* package the two LED signals as output-only GPIOs? */
+ bool use_leds;
+
+ /* gpio-n should control VMMC(n+1) if BIT(n) in mmc_cd is set */
+ u8 mmc_cd;
+
/* For gpio-N, bit (1 << N) in "pullups" is set if that pullup
* should be enabled. Else, if that bit is set in "pulldowns",
* that pulldown is enabled. Don't waste power by letting any
/*----------------------------------------------------------------------*/
+int twl4030_sih_setup(int module);
+
/*
* FIXME completely stop using TWL4030_IRQ_BASE ... instead, pass the
* IRQ data to subsidiary devices using platform device resources.
#define TWL4030_MODIRQ_BCI (TWL4030_IRQ_BASE + 2)
#define TWL4030_MODIRQ_MADC (TWL4030_IRQ_BASE + 3)
/* #define TWL4030_MODIRQ_USB (TWL4030_IRQ_BASE + 4) */
-#define TWL4030_MODIRQ_PWR (TWL4030_IRQ_BASE + 5)
+/* #define TWL4030_MODIRQ_PWR (TWL4030_IRQ_BASE + 5) */
#define TWL4030_PWRIRQ_PWRBTN (TWL4030_PWR_IRQ_BASE + 0)
-#define TWL4030_PWRIRQ_CHG_PRES (TWL4030_PWR_IRQ_BASE + 1)
-#define TWL4030_PWRIRQ_USB_PRES (TWL4030_PWR_IRQ_BASE + 2)
-#define TWL4030_PWRIRQ_RTC (TWL4030_PWR_IRQ_BASE + 3)
-#define TWL4030_PWRIRQ_HOT_DIE (TWL4030_PWR_IRQ_BASE + 4)
-#define TWL4030_PWRIRQ_PWROK_TIMEOUT (TWL4030_PWR_IRQ_BASE + 5)
-#define TWL4030_PWRIRQ_MBCHG (TWL4030_PWR_IRQ_BASE + 6)
-#define TWL4030_PWRIRQ_SC_DETECT (TWL4030_PWR_IRQ_BASE + 7)
+/* #define TWL4030_PWRIRQ_CHG_PRES (TWL4030_PWR_IRQ_BASE + 1) */
+/* #define TWL4030_PWRIRQ_USB_PRES (TWL4030_PWR_IRQ_BASE + 2) */
+/* #define TWL4030_PWRIRQ_RTC (TWL4030_PWR_IRQ_BASE + 3) */
+/* #define TWL4030_PWRIRQ_HOT_DIE (TWL4030_PWR_IRQ_BASE + 4) */
+/* #define TWL4030_PWRIRQ_PWROK_TIMEOUT (TWL4030_PWR_IRQ_BASE + 5) */
+/* #define TWL4030_PWRIRQ_MBCHG (TWL4030_PWR_IRQ_BASE + 6) */
+/* #define TWL4030_PWRIRQ_SC_DETECT (TWL4030_PWR_IRQ_BASE + 7) */
/* Rest are unsued currently*/
/* TWL4030 GPIO interrupt definitions */
#define TWL4030_GPIO_IRQ_NO(n) (TWL4030_GPIO_IRQ_BASE + (n))
-#define TWL4030_GPIO_IS_ENABLE 1
/*
* Exported TWL4030 GPIO APIs
*
* WARNING -- use standard GPIO and IRQ calls instead; these will vanish.
*/
-int twl4030_get_gpio_datain(int gpio);
-int twl4030_request_gpio(int gpio);
int twl4030_set_gpio_debounce(int gpio, int enable);
-int twl4030_free_gpio(int gpio);
#if defined(CONFIG_TWL4030_BCI_BATTERY) || \
defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
projects / linux-2.6-omap-h63xx.git / commitdiff