--- /dev/null +++ b/drivers/cbus/cbus.c @@ -0,0 +1,335 @@ +/* + * drivers/cbus/cbus.c + * + * Support functions for CBUS serial protocol + * + * Copyright (C) 2004-2010 Nokia Corporation + * Contact: Felipe Balbi + * + * Written by Juha Yrjölä , + * David Weinehall , and + * Mikko Ylinen + * + * Several updates and cleanups by Felipe Balbi + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "cbus.h" + +#define CBUS_XFER_READ 1 +#define CBUS_XFER_WRITE 0 + +struct cbus_host { + /* host lock */ + spinlock_t lock; + + struct device *dev; + + int clk_gpio; + int dat_gpio; + int sel_gpio; +}; + +/** + * cbus_send_bit - sends one bit over the bus + * @host: the host we're using + * @bit: one bit of information to send + * @input: whether to set data pin as input after sending + */ +static int cbus_send_bit(struct cbus_host *host, unsigned bit, + unsigned input) +{ + int ret = 0; + + gpio_set_value(host->dat_gpio, bit ? 1 : 0); + gpio_set_value(host->clk_gpio, 1); + + /* The data bit is read on the rising edge of CLK */ + if (input) + ret = gpio_direction_input(host->dat_gpio); + + gpio_set_value(host->clk_gpio, 0); + + return ret; +} + +/** + * cbus_send_data - sends @len amount of data over the bus + * @host: the host we're using + * @data: the data to send + * @len: size of the transfer + * @input: whether to set data pin as input after sending + */ +static int cbus_send_data(struct cbus_host *host, unsigned data, unsigned len, + unsigned input) +{ + int ret = 0; + int i; + + for (i = len; i > 0; i--) { + ret = cbus_send_bit(host, data & (1 << (i - 1)), + input && (i == 1)); + if (ret < 0) + goto out; + } + +out: + return ret; +} + +/** + * cbus_receive_bit - receives one bit from the bus + * @host: the host we're using + */ +static int cbus_receive_bit(struct cbus_host *host) +{ + int ret; + + gpio_set_value(host->clk_gpio, 1); + ret = gpio_get_value(host->dat_gpio); + if (ret < 0) + goto out; + gpio_set_value(host->clk_gpio, 0); + +out: + return ret; +} + +/** + * cbus_receive_data - receives @len data from the bus + * @host: the host we're using + * @len: the length of data to receive + */ +static int cbus_receive_data(struct cbus_host *host, unsigned len) +{ + int ret = 0; + int i; + + for (i = 16; i > 0; i--) { + int bit = cbus_receive_bit(host); + + if (bit < 0) + goto out; + + if (bit) + ret |= 1 << (i - 1); + } + +out: + return ret; +} + +/** + * cbus_transfer - transfers data over the bus + * @host: the host we're using + * @rw: read/write flag + * @dev: device address + * @reg: register address + * @data: if @rw == 0 data to send otherwise 0 + */ +static int cbus_transfer(struct cbus_host *host, unsigned rw, unsigned dev, + unsigned reg, unsigned data) +{ + unsigned long flags; + int input = 0; + int ret = 0; + + /* We don't want interrupts disturbing our transfer */ + spin_lock_irqsave(&host->lock, flags); + + /* Reset state and start of transfer, SEL stays down during transfer */ + gpio_set_value(host->sel_gpio, 0); + + /* Set the DAT pin to output */ + gpio_direction_output(host->dat_gpio, 1); + + /* Send the device address */ + ret = cbus_send_data(host, dev, 3, 0); + if (ret < 0) { + dev_dbg(host->dev, "failed sending device addr\n"); + goto out; + } + + /* Send the rw flag */ + ret = cbus_send_bit(host, rw, 0); + if (ret < 0) { + dev_dbg(host->dev, "failed sending read/write flag\n"); + goto out; + } + + /* Send the register address */ + if (rw) + input = true; + + ret = cbus_send_data(host, reg, 5, input); + if (ret < 0) { + dev_dbg(host->dev, "failed sending register addr\n"); + goto out; + } + + if (!rw) { + ret = cbus_send_data(host, data, 16, 0); + if (ret < 0) { + dev_dbg(host->dev, "failed sending data\n"); + goto out; + } + } else { + gpio_set_value(host->clk_gpio, 1); + + ret = cbus_receive_data(host, 16); + if (ret < 0) { + dev_dbg(host->dev, "failed receiving data\n"); + goto out; + } + } + + /* Indicate end of transfer, SEL goes up until next transfer */ + gpio_set_value(host->sel_gpio, 1); + gpio_set_value(host->clk_gpio, 1); + gpio_set_value(host->clk_gpio, 0); + +out: + spin_unlock_irqrestore(&host->lock, flags); + + return ret; +} + +/** + * cbus_read_reg - reads a given register from the device + * @child: the child device + * @dev: device address + * @reg: register address + */ +int cbus_read_reg(struct device *child, unsigned dev, unsigned reg) +{ + struct cbus_host *host = dev_get_drvdata(child->parent); + + return cbus_transfer(host, CBUS_XFER_READ, dev, reg, 0); +} +EXPORT_SYMBOL(cbus_read_reg); + +/** + * cbus_write_reg - writes to a given register of the device + * @child: the child device + * @dev: device address + * @reg: register address + * @val: data to be written to @reg + */ +int cbus_write_reg(struct device *child, unsigned dev, unsigned reg, + unsigned val) +{ + struct cbus_host *host = dev_get_drvdata(child->parent); + + return cbus_transfer(host, CBUS_XFER_WRITE, dev, reg, val); +} +EXPORT_SYMBOL(cbus_write_reg); + +static int __init cbus_bus_probe(struct platform_device *pdev) +{ + struct cbus_host *chost; + struct cbus_host_platform_data *pdata = pdev->dev.platform_data; + int ret; + + chost = kzalloc(sizeof(*chost), GFP_KERNEL); + if (chost == NULL) + return -ENOMEM; + + spin_lock_init(&chost->lock); + + chost->clk_gpio = pdata->clk_gpio; + chost->dat_gpio = pdata->dat_gpio; + chost->sel_gpio = pdata->sel_gpio; + chost->dev = &pdev->dev; + + ret = gpio_request(chost->clk_gpio, "CBUS clk"); + if (ret < 0) + goto exit1; + + ret = gpio_request(chost->dat_gpio, "CBUS data"); + if (ret < 0) + goto exit2; + + ret = gpio_request(chost->sel_gpio, "CBUS sel"); + if (ret < 0) + goto exit3; + + gpio_direction_output(chost->clk_gpio, 0); + gpio_direction_input(chost->dat_gpio); + gpio_direction_output(chost->sel_gpio, 1); + + gpio_set_value(chost->clk_gpio, 1); + gpio_set_value(chost->clk_gpio, 0); + + platform_set_drvdata(pdev, chost); + + return 0; +exit3: + gpio_free(chost->dat_gpio); +exit2: + gpio_free(chost->clk_gpio); +exit1: + kfree(chost); + + return ret; +} + +static void __exit cbus_bus_remove(struct platform_device *pdev) +{ + struct cbus_host *chost = platform_get_drvdata(pdev); + + gpio_free(chost->sel_gpio); + gpio_free(chost->dat_gpio); + gpio_free(chost->clk_gpio); + + kfree(chost); +} + +static struct platform_driver cbus_driver = { + .remove = __exit_p(cbus_bus_remove), + .driver = { + .name = "cbus", + }, +}; + +static int __init cbus_bus_init(void) +{ + return platform_driver_probe(&cbus_driver, cbus_bus_probe); +} +subsys_initcall(cbus_bus_init); + +static void __exit cbus_bus_exit(void) +{ + platform_driver_unregister(&cbus_driver); +} +module_exit(cbus_bus_exit); + +MODULE_DESCRIPTION("CBUS serial protocol"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juha Yrjölä"); +MODULE_AUTHOR("David Weinehall"); +MODULE_AUTHOR("Mikko Ylinen"); +MODULE_AUTHOR("Felipe Balbi "); + --- /dev/null +++ b/drivers/cbus/cbus.h @@ -0,0 +1,30 @@ +/* + * drivers/cbus/cbus.h + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Juha Yrjölä and + * David Weinehall + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 + */ + +#ifndef __DRIVERS_CBUS_CBUS_H +#define __DRIVERS_CBUS_CBUS_H + +extern int cbus_read_reg(struct device *, unsigned dev, unsigned reg); +extern int cbus_write_reg(struct device *, unsigned dev, unsigned reg, + unsigned val); + +#endif /* __DRIVERS_CBUS_CBUS_H */ --- /dev/null +++ b/drivers/cbus/Kconfig @@ -0,0 +1,86 @@ +# +# CBUS device configuration +# + +menu "CBUS support" + +config CBUS + bool "CBUS support on OMAP" + ---help--- + CBUS is a proprietary serial protocol by Nokia. It is mainly + used for accessing Energy Management auxiliary chips. + + If you want CBUS support, you should say Y here. + +config CBUS_TAHVO + depends on CBUS + bool "Support for Tahvo" + ---help--- + Tahvo is a mixed signal ASIC with some system features + + If you want Tahvo support, you should say Y here. + +if CBUS_TAHVO + +config CBUS_TAHVO_USB + depends on USB + depends on ARCH_OMAP + select USB_OTG_UTILS + tristate "Support for Tahvo USB transceiver" + ---help--- + If you want Tahvo support for USB transceiver, say Y or M here. + +config CBUS_TAHVO_USB_HOST_BY_DEFAULT + depends on CBUS_TAHVO_USB && USB_OTG + boolean "Device in USB host mode by default" + ---help--- + Say Y here, if you want the device to enter USB host mode + by default on bootup. + +endif # CBUS_TAHVO + +config CBUS_RETU + depends on CBUS + bool "Support for Retu" + ---help--- + Retu is a mixed signal ASIC with some system features + + If you want Retu support, you should say Y here. + +if CBUS_RETU + +config CBUS_RETU_POWERBUTTON + depends on INPUT + bool "Support for Retu power button" + ---help--- + The power button on Nokia 770 is connected to the Retu ASIC. + + If you want support for the Retu power button, you should say Y here. + +config CBUS_RETU_RTC + depends on RTC_CLASS + depends on ARCH_OMAP + tristate "Support for Retu pseudo-RTC" + ---help--- + Say Y here if you want support for the device that alleges to be an + RTC in Retu. This will expose a sysfs interface for it. + +config CBUS_RETU_WDT + depends on SYSFS && WATCHDOG + depends on ARCH_OMAP + tristate "Support for Retu watchdog timer" + ---help--- + Say Y here if you want support for the watchdog in Retu. This will + expose a sysfs interface to grok it. + +config CBUS_RETU_HEADSET + depends on SYSFS + tristate "Support for headset detection with Retu/Vilma" + ---help--- + Say Y here if you want support detecting a headset that's connected + to Retu/Vilma. Detection state and events are exposed through + sysfs. + +endif # CBUS_RETU + +endmenu --- /dev/null +++ b/drivers/cbus/Makefile @@ -0,0 +1,13 @@ +# +# Makefile for CBUS. +# + +obj-$(CONFIG_CBUS) += cbus.o +obj-$(CONFIG_CBUS_TAHVO) += tahvo.o +obj-$(CONFIG_CBUS_RETU) += retu.o +obj-$(CONFIG_CBUS_TAHVO_USB) += tahvo-usb.o + +obj-$(CONFIG_CBUS_RETU_POWERBUTTON) += retu-pwrbutton.o +obj-$(CONFIG_CBUS_RETU_RTC) += retu-rtc.o +obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.o +obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o --- /dev/null +++ b/drivers/cbus/retu.c @@ -0,0 +1,549 @@ +/** + * drivers/cbus/retu.c + * + * Support functions for Retu ASIC + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Juha Yrjölä , + * David Weinehall , and + * Mikko Ylinen + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "cbus.h" +#include "retu.h" + +struct retu { + /* Device lock */ + struct mutex mutex; + struct device *dev; + + int devid; + + int irq_base; + int irq_end; + + int irq; + + int ack; + bool ack_pending; + + int mask; + bool mask_pending; + + bool is_vilma; +}; + +static struct retu *the_retu; + +/** + * __retu_read_reg - Read a value from a register in Retu + * @retu: pointer to retu structure + * @reg: the register address to read from + */ +static int __retu_read_reg(struct retu *retu, unsigned reg) +{ + return cbus_read_reg(retu->dev, retu->devid, reg); +} + +/** + * __retu_write_reg - Writes a value to a register in Retu + * @retu: pointer to retu structure + * @reg: the register address to write to + * @val: the value to write to the register + */ +static void __retu_write_reg(struct retu *retu, unsigned reg, u16 val) +{ + cbus_write_reg(retu->dev, retu->devid, reg, val); +} + +/** + * retu_read_reg - Read a value from a register in Retu + * @child: device pointer for the calling child + * @reg: the register to read from + * + * This function returns the contents of the specified register + */ +int retu_read_reg(struct device *child, unsigned reg) +{ + struct retu *retu = dev_get_drvdata(child->parent); + + return __retu_read_reg(retu, reg); +} +EXPORT_SYMBOL_GPL(retu_read_reg); + +/** + * retu_write_reg - Write a value to a register in Retu + * @child: the pointer to our calling child + * @reg: the register to write to + * @val: the value to write to the register + * + * This function writes a value to the specified register + */ +void retu_write_reg(struct device *child, unsigned reg, u16 val) +{ + struct retu *retu = dev_get_drvdata(child->parent); + + mutex_lock(&retu->mutex); + __retu_write_reg(retu, reg, val); + mutex_unlock(&retu->mutex); +} +EXPORT_SYMBOL_GPL(retu_write_reg); + +/** + * retu_set_clear_reg_bits - helper function to read/set/clear bits + * @child: device pointer to calling child + * @reg: the register address + * @set: mask for setting bits + * @clear: mask for clearing bits + */ +void retu_set_clear_reg_bits(struct device *child, unsigned reg, u16 set, + u16 clear) +{ + struct retu *retu = dev_get_drvdata(child->parent); + u16 w; + + mutex_lock(&retu->mutex); + w = __retu_read_reg(retu, reg); + w &= ~clear; + w |= set; + __retu_write_reg(retu, reg, w); + mutex_unlock(&retu->mutex); +} +EXPORT_SYMBOL_GPL(retu_set_clear_reg_bits); + +#define ADC_MAX_CHAN_NUMBER 13 + +/** + * retu_read_adc - Reads AD conversion result + * @child: device pointer to calling child + * @channel: the ADC channel to read from + */ +int retu_read_adc(struct device *child, int channel) +{ + struct retu *retu = dev_get_drvdata(child->parent); + int res; + + if (!retu) + return -ENODEV; + + if (channel < 0 || channel > ADC_MAX_CHAN_NUMBER) + return -EINVAL; + + mutex_lock(&retu->mutex); + + if ((channel == 8) && retu->is_vilma) { + int scr = __retu_read_reg(retu, RETU_REG_ADCSCR); + int ch = (__retu_read_reg(retu, RETU_REG_ADCR) >> 10) & 0xf; + if (((scr & 0xff) != 0) && (ch != 8)) + __retu_write_reg(retu, RETU_REG_ADCSCR, (scr & ~0xff)); + } + + /* Select the channel and read result */ + __retu_write_reg(retu, RETU_REG_ADCR, channel << 10); + res = __retu_read_reg(retu, RETU_REG_ADCR) & 0x3ff; + + if (retu->is_vilma) + __retu_write_reg(retu, RETU_REG_ADCR, (1 << 13)); + + /* Unlock retu */ + mutex_unlock(&retu->mutex); + + return res; +} +EXPORT_SYMBOL_GPL(retu_read_adc); + +static irqreturn_t retu_irq_handler(int irq, void *_retu) +{ + struct retu *retu = _retu; + + u16 idr; + u16 imr; + + mutex_lock(&retu->mutex); + idr = __retu_read_reg(retu, RETU_REG_IDR); + imr = __retu_read_reg(retu, RETU_REG_IMR); + mutex_unlock(&retu->mutex); + + idr &= ~imr; + if (!idr) { + dev_vdbg(retu->dev, "No IRQ, spurious?\n"); + return IRQ_NONE; + } + + while (idr) { + unsigned long pending = __ffs(idr); + unsigned int irq; + + idr &= ~BIT(pending); + irq = pending + retu->irq_base; + handle_nested_irq(irq); + } + + return IRQ_HANDLED; +} + +/* -------------------------------------------------------------------------- */ + +static void retu_irq_mask(struct irq_data *data) +{ + struct retu *retu = irq_data_get_irq_chip_data(data); + int irq = data->irq; + + retu->mask |= (1 << (irq - retu->irq_base)); + retu->mask_pending = true; +} + +static void retu_irq_unmask(struct irq_data *data) +{ + struct retu *retu = irq_data_get_irq_chip_data(data); + int irq = data->irq; + + retu->mask &= ~(1 << (irq - retu->irq_base)); + retu->mask_pending = true; + +} + +static void retu_irq_ack(struct irq_data *data) +{ + struct retu *retu = irq_data_get_irq_chip_data(data); + int irq = data->irq; + + retu->ack |= (1 << (irq - retu->irq_base)); + retu->ack_pending = true; +} + +static void retu_bus_lock(struct irq_data *data) +{ + struct retu *retu = irq_data_get_irq_chip_data(data); + + mutex_lock(&retu->mutex); +} + +static void retu_bus_sync_unlock(struct irq_data *data) +{ + struct retu *retu = irq_data_get_irq_chip_data(data); + + if (retu->mask_pending) { + __retu_write_reg(retu, RETU_REG_IMR, retu->mask); + retu->mask_pending = false; + } + + if (retu->ack_pending) { + __retu_write_reg(retu, RETU_REG_IDR, retu->ack); + retu->ack_pending = false; + } + + mutex_unlock(&retu->mutex); +} + +static struct irq_chip retu_irq_chip = { + .name = "retu", + .irq_bus_lock = retu_bus_lock, + .irq_bus_sync_unlock = retu_bus_sync_unlock, + .irq_mask = retu_irq_mask, + .irq_unmask = retu_irq_unmask, + .irq_ack = retu_irq_ack, +}; + +static inline void retu_irq_setup(int irq) +{ +#ifdef CONFIG_ARM + set_irq_flags(irq, IRQF_VALID); +#else + irq_set_noprobe(irq); +#endif +} + +static void retu_irq_init(struct retu *retu) +{ + int base = retu->irq_base; + int end = retu->irq_end; + int irq; + + for (irq = base; irq < end; irq++) { + irq_set_chip_data(irq, retu); + irq_set_chip_and_handler(irq, &retu_irq_chip, + handle_simple_irq); + irq_set_nested_thread(irq, 1); + retu_irq_setup(irq); + } +} + +static void retu_irq_exit(struct retu *retu) +{ + int base = retu->irq_base; + int end = retu->irq_end; + int irq; + + for (irq = base; irq < end; irq++) { +#ifdef CONFIG_ARM + set_irq_flags(irq, 0); +#endif + irq_set_chip_and_handler(irq, NULL, NULL); + irq_set_chip_data(irq, NULL); + } +} + +/* -------------------------------------------------------------------------- */ + +/** + * retu_power_off - Shut down power to system + * + * This function puts the system in power off state + */ +static void retu_power_off(void) +{ + struct retu *retu = the_retu; + unsigned reg; + + reg = __retu_read_reg(retu, RETU_REG_CC1); + + /* Ignore power button state */ + __retu_write_reg(retu, RETU_REG_CC1, reg | 2); + /* Expire watchdog immediately */ + __retu_write_reg(retu, RETU_REG_WATCHDOG, 0); + /* Wait for poweroff*/ + for (;;); +} + +static struct resource generic_resources[] = { + { + .start = -EINVAL, /* fixed later */ + .flags = IORESOURCE_IRQ, + }, + { + .start = -EINVAL, /* fixed later */ + .flags = IORESOURCE_IRQ, + }, +}; + +/** + * retu_allocate_child - Allocates one Retu child + * @name: name of new child + * @parent: parent device for this child + */ +static struct device *retu_allocate_child(char *name, struct device *parent, + int irq_base, int irq1, int irq2, int num) +{ + struct platform_device *pdev; + int status; + + pdev = platform_device_alloc(name, -1); + if (!pdev) { + dev_dbg(parent, "can't allocate %s\n", name); + goto err; + } + + pdev->dev.parent = parent; + + if (num) { + generic_resources[0].start = irq_base + irq1; + generic_resources[1].start = irq_base + irq2; + + status = platform_device_add_resources(pdev, + generic_resources, num); + if (status < 0) { + dev_dbg(parent, "can't add resources to %s\n", name); + goto err; + } + } + + status = platform_device_add(pdev); + if (status < 0) { + dev_dbg(parent, "can't add %s\n", name); + goto err; + } + + return &pdev->dev; + +err: + platform_device_put(pdev); + + return NULL; +} + +/** + * retu_allocate_children - Allocates Retu's children + */ +static int retu_allocate_children(struct device *parent, int irq_base) +{ + struct device *child; + + child = retu_allocate_child("retu-pwrbutton", parent, irq_base, + RETU_INT_PWR, -1, 1); + if (!child) + return -ENOMEM; + + child = retu_allocate_child("retu-headset", parent, irq_base, + RETU_INT_HOOK, -1, 1); + if (!child) + return -ENOMEM; + + child = retu_allocate_child("retu-rtc", parent, irq_base, + RETU_INT_RTCS, RETU_INT_RTCA, 2); + if (!child) + return -ENOMEM; + + child = retu_allocate_child("retu-wdt", parent, -1, -1, -1, 0); + if (!child) + return -ENOMEM; + + return 0; +} + +/** + * retu_probe - Probe for Retu ASIC + * @dev: the Retu device + * + * Probe for the Retu ASIC and allocate memory + * for its device-struct if found + */ +static int __devinit retu_probe(struct platform_device *pdev) +{ + struct retu *retu; + struct cbus_retu_platform_data *pdata = pdev->dev.platform_data; + + int ret = -ENOMEM; + int rev; + + retu = kzalloc(sizeof(*retu), GFP_KERNEL); + if (!retu) { + dev_err(&pdev->dev, "not enough memory\n"); + goto err0; + } + + platform_set_drvdata(pdev, retu); + + ret = irq_alloc_descs(-1, 0, MAX_RETU_IRQ_HANDLERS, 0); + if (ret < 0) { + dev_err(&pdev->dev, "failed to allocate IRQ descs\n"); + goto err1; + } + + retu->irq = platform_get_irq(pdev, 0); + retu->irq_base = ret; + retu->irq_end = ret + MAX_RETU_IRQ_HANDLERS; + retu->devid = pdata->devid; + retu->dev = &pdev->dev; + the_retu = retu; + + mutex_init(&retu->mutex); + + retu_irq_init(retu); + + rev = __retu_read_reg(retu, RETU_REG_ASICR) & 0xff; + if (rev & (1 << 7)) + retu->is_vilma = true; + + dev_info(&pdev->dev, "%s v%d.%d found\n", + retu->is_vilma ? "Vilma" : "Retu", + (rev >> 4) & 0x07, rev & 0x0f); + + /* Mask all RETU interrupts */ + __retu_write_reg(retu, RETU_REG_IMR, 0xffff); + + ret = request_threaded_irq(retu->irq, NULL, retu_irq_handler, + IRQF_ONESHOT, "retu", retu); + if (ret < 0) { + dev_err(&pdev->dev, "Unable to register IRQ handler\n"); + goto err2; + } + + irq_set_irq_wake(retu->irq, 1); + + /* Register power off function */ + pm_power_off = retu_power_off; + + ret = retu_allocate_children(&pdev->dev, retu->irq_base); + if (ret < 0) { + dev_err(&pdev->dev, "Unable to allocate Retu children\n"); + goto err3; + } + + return 0; + +err3: + pm_power_off = NULL; + free_irq(retu->irq, retu); + +err2: + retu_irq_exit(retu); + irq_free_descs(retu->irq_base, MAX_RETU_IRQ_HANDLERS); + +err1: + kfree(retu); + the_retu = NULL; + +err0: + return ret; +} + +static int __devexit retu_remove(struct platform_device *pdev) +{ + struct retu *retu = platform_get_drvdata(pdev); + + pm_power_off = NULL; + the_retu = NULL; + + free_irq(retu->irq, retu); + retu_irq_exit(retu); + irq_free_descs(retu->irq_base, MAX_RETU_IRQ_HANDLERS); + kfree(retu); + + return 0; +} + +static struct platform_driver retu_driver = { + .probe = retu_probe, + .remove = __devexit_p(retu_remove), + .driver = { + .name = "retu", + }, +}; + +static int __init retu_init(void) +{ + return platform_driver_register(&retu_driver); +} +subsys_initcall(retu_init); + +static void __exit retu_exit(void) +{ + platform_driver_unregister(&retu_driver); +} +module_exit(retu_exit); + +MODULE_DESCRIPTION("Retu ASIC control"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juha Yrjölä"); +MODULE_AUTHOR("David Weinehall"); +MODULE_AUTHOR("Mikko Ylinen"); --- /dev/null +++ b/drivers/cbus/retu.h @@ -0,0 +1,85 @@ +/** + * drivers/cbus/retu.h + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Juha Yrjölä and + * David Weinehall + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 + */ + +#ifndef __DRIVERS_CBUS_RETU_H +#define __DRIVERS_CBUS_RETU_H + +#include + +/* Registers */ +#define RETU_REG_ASICR 0x00 /* ASIC ID & revision */ +#define RETU_REG_IDR 0x01 /* Interrupt ID */ +#define RETU_REG_IMR 0x02 /* Interrupt mask */ +#define RETU_REG_RTCDSR 0x03 /* RTC seconds register */ +#define RETU_REG_RTCHMR 0x04 /* RTC hours and minutes register */ +#define RETU_REG_RTCHMAR 0x05 /* RTC hours and minutes alarm and time set register */ +#define RETU_REG_RTCCALR 0x06 /* RTC calibration register */ +#define RETU_REG_ADCR 0x08 /* ADC result */ +#define RETU_REG_ADCSCR 0x09 /* ADC sample ctrl */ +#define RETU_REG_CC1 0x0d /* Common control register 1 */ +#define RETU_REG_CC2 0x0e /* Common control register 2 */ +#define RETU_REG_CTRL_CLR 0x0f /* Regulator clear register */ +#define RETU_REG_CTRL_SET 0x10 /* Regulator set register */ +#define RETU_REG_STATUS 0x16 /* Status register */ +#define RETU_REG_STATUS_BATAVAIL 0x0100 /* Battery available */ +#define RETU_REG_STATUS_CHGPLUG 0x1000 /* Charger is plugged in */ +#define RETU_REG_WATCHDOG 0x17 /* Watchdog register */ +#define RETU_REG_AUDTXR 0x18 /* Audio Codec Tx register */ +#define RETU_REG_MAX 0x1f + +/* Interrupt sources */ +#define RETU_INT_PWR 0 +#define RETU_INT_CHAR 1 +#define RETU_INT_RTCS 2 +#define RETU_INT_RTCM 3 +#define RETU_INT_RTCD 4 +#define RETU_INT_RTCA 5 +#define RETU_INT_HOOK 6 +#define RETU_INT_HEAD 7 +#define RETU_INT_ADCS 8 + +#define MAX_RETU_IRQ_HANDLERS 16 + +/* ADC channels */ +#define RETU_ADC_GND 0x00 /* Ground */ +#define RETU_ADC_BSI 0x01 /* Battery Size Indicator */ +#define RETU_ADC_BATTEMP 0x02 /* Battery temperature */ +#define RETU_ADC_CHGVOLT 0x03 /* Charger voltage */ +#define RETU_ADC_HEADSET 0x04 /* Headset detection */ +#define RETU_ADC_HOOKDET 0x05 /* Hook detection */ +#define RETU_ADC_RFGP 0x06 /* RF GP */ +#define RETU_ADC_WBTX 0x07 /* Wideband Tx detection */ +#define RETU_ADC_BATTVOLT 0x08 /* Battery voltage measurement */ +#define RETU_ADC_GND2 0x09 /* Ground */ +#define RETU_ADC_LIGHTSENS 0x0A /* Light sensor */ +#define RETU_ADC_LIGHTTEMP 0x0B /* Light sensor temperature */ +#define RETU_ADC_BKUPVOLT 0x0C /* Backup battery voltage */ +#define RETU_ADC_TEMP 0x0D /* RETU temperature */ + + +int retu_read_reg(struct device *child, unsigned reg); +void retu_write_reg(struct device *child, unsigned reg, u16 val); +void retu_set_clear_reg_bits(struct device *child, unsigned reg, u16 set, + u16 clear); +int retu_read_adc(struct device *child, int channel); + +#endif /* __DRIVERS_CBUS_RETU_H */ --- /dev/null +++ b/drivers/cbus/retu-headset.c @@ -0,0 +1,359 @@ +/** + * Retu/Vilma headset detection + * + * Copyright (C) 2006 Nokia Corporation + * + * Written by Juha Yrjölä + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#include "retu.h" + +#define RETU_ADC_CHANNEL_HOOKDET 0x05 + +#define RETU_HEADSET_KEY KEY_PHONE + +struct retu_headset { + spinlock_t lock; + struct mutex mutex; + struct device *dev; + struct input_dev *idev; + unsigned bias_enabled; + unsigned detection_enabled; + unsigned pressed; + struct timer_list enable_timer; + struct timer_list detect_timer; + int irq; +}; + +static void retu_headset_set_bias(struct retu_headset *hs, int enable) +{ + if (enable) { + retu_set_clear_reg_bits(hs->dev, RETU_REG_AUDTXR, + (1 << 0) | (1 << 1), 0); + msleep(2); + retu_set_clear_reg_bits(hs->dev, RETU_REG_AUDTXR, + 1 << 3, 0); + } else { + retu_set_clear_reg_bits(hs->dev, RETU_REG_AUDTXR, 0, + (1 << 0) | (1 << 1) | (1 << 3)); + } +} + +static void retu_headset_enable(struct retu_headset *hs) +{ + mutex_lock(&hs->mutex); + if (!hs->bias_enabled) { + hs->bias_enabled = 1; + retu_headset_set_bias(hs, 1); + } + mutex_unlock(&hs->mutex); +} + +static void retu_headset_disable(struct retu_headset *hs) +{ + mutex_lock(&hs->mutex); + if (hs->bias_enabled) { + hs->bias_enabled = 0; + retu_headset_set_bias(hs, 0); + } + mutex_unlock(&hs->mutex); +} + +static void retu_headset_det_enable(struct retu_headset *hs) +{ + mutex_lock(&hs->mutex); + if (!hs->detection_enabled) { + hs->detection_enabled = 1; + retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1, + (1 << 10) | (1 << 8), 0); + } + mutex_unlock(&hs->mutex); +} + +static void retu_headset_det_disable(struct retu_headset *hs) +{ + unsigned long flags; + + mutex_lock(&hs->mutex); + if (hs->detection_enabled) { + hs->detection_enabled = 0; + del_timer_sync(&hs->enable_timer); + del_timer_sync(&hs->detect_timer); + spin_lock_irqsave(&hs->lock, flags); + if (hs->pressed) + input_report_key(hs->idev, RETU_HEADSET_KEY, 0); + spin_unlock_irqrestore(&hs->lock, flags); + retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1, 0, + (1 << 10) | (1 << 8)); + } + mutex_unlock(&hs->mutex); +} + +static ssize_t retu_headset_hookdet_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int val; + + val = retu_read_adc(dev, RETU_ADC_CHANNEL_HOOKDET); + return sprintf(buf, "%d\n", val); +} + +static DEVICE_ATTR(hookdet, S_IRUGO, retu_headset_hookdet_show, NULL); + +static ssize_t retu_headset_enable_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct retu_headset *hs = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", hs->bias_enabled); +} + +static ssize_t retu_headset_enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct retu_headset *hs = dev_get_drvdata(dev); + int enable; + + if (sscanf(buf, "%u", &enable) != 1) + return -EINVAL; + if (enable) + retu_headset_enable(hs); + else + retu_headset_disable(hs); + return count; +} + +static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR | S_IWGRP, + retu_headset_enable_show, retu_headset_enable_store); + +static ssize_t retu_headset_enable_det_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct retu_headset *hs = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", hs->detection_enabled); +} + +static ssize_t retu_headset_enable_det_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct retu_headset *hs = dev_get_drvdata(dev); + int enable; + + if (sscanf(buf, "%u", &enable) != 1) + return -EINVAL; + if (enable) + retu_headset_det_enable(hs); + else + retu_headset_det_disable(hs); + return count; +} + +static DEVICE_ATTR(enable_det, S_IRUGO | S_IWUSR | S_IWGRP, + retu_headset_enable_det_show, + retu_headset_enable_det_store); + +static irqreturn_t retu_headset_hook_interrupt(int irq, void *_hs) +{ + struct retu_headset *hs = _hs; + unsigned long flags; + + spin_lock_irqsave(&hs->lock, flags); + if (!hs->pressed) { + /* Headset button was just pressed down. */ + hs->pressed = 1; + input_report_key(hs->idev, RETU_HEADSET_KEY, 1); + } + spin_unlock_irqrestore(&hs->lock, flags); + retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1, 0, + (1 << 10) | (1 << 8)); + mod_timer(&hs->enable_timer, jiffies + msecs_to_jiffies(50)); + + return IRQ_HANDLED; +} + +static void retu_headset_enable_timer(unsigned long arg) +{ + struct retu_headset *hs = (struct retu_headset *) arg; + + retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1, + (1 << 10) | (1 << 8), 0); + mod_timer(&hs->detect_timer, jiffies + msecs_to_jiffies(350)); +} + +static void retu_headset_detect_timer(unsigned long arg) +{ + struct retu_headset *hs = (struct retu_headset *) arg; + unsigned long flags; + + spin_lock_irqsave(&hs->lock, flags); + if (hs->pressed) { + hs->pressed = 0; + input_report_key(hs->idev, RETU_HEADSET_KEY, 0); + } + spin_unlock_irqrestore(&hs->lock, flags); +} + +static int __init retu_headset_probe(struct platform_device *pdev) +{ + struct retu_headset *hs; + int irq; + int r; + + hs = kzalloc(sizeof(*hs), GFP_KERNEL); + if (hs == NULL) + return -ENOMEM; + + hs->dev = &pdev->dev; + + hs->idev = input_allocate_device(); + if (hs->idev == NULL) { + r = -ENOMEM; + goto err1; + } + hs->idev->name = "retu-headset"; + hs->idev->dev.parent = &pdev->dev; + set_bit(EV_KEY, hs->idev->evbit); + set_bit(RETU_HEADSET_KEY, hs->idev->keybit); + r = input_register_device(hs->idev); + if (r < 0) + goto err2; + + r = device_create_file(&pdev->dev, &dev_attr_hookdet); + if (r < 0) + goto err3; + r = device_create_file(&pdev->dev, &dev_attr_enable); + if (r < 0) + goto err4; + r = device_create_file(&pdev->dev, &dev_attr_enable_det); + if (r < 0) + goto err5; + platform_set_drvdata(pdev, hs); + + spin_lock_init(&hs->lock); + mutex_init(&hs->mutex); + setup_timer(&hs->enable_timer, retu_headset_enable_timer, + (unsigned long) hs); + setup_timer(&hs->detect_timer, retu_headset_detect_timer, + (unsigned long) hs); + + irq = platform_get_irq(pdev, 0); + hs->irq = irq; + + r = request_threaded_irq(irq, NULL, retu_headset_hook_interrupt, 0, + "hookdet", hs); + if (r != 0) { + dev_err(&pdev->dev, "hookdet IRQ not available\n"); + goto err6; + } + + return 0; +err6: + device_remove_file(&pdev->dev, &dev_attr_enable_det); +err5: + device_remove_file(&pdev->dev, &dev_attr_enable); +err4: + device_remove_file(&pdev->dev, &dev_attr_hookdet); +err3: + input_unregister_device(hs->idev); +err2: + input_free_device(hs->idev); +err1: + kfree(hs); + return r; +} + +static int retu_headset_remove(struct platform_device *pdev) +{ + struct retu_headset *hs = platform_get_drvdata(pdev); + + device_remove_file(&pdev->dev, &dev_attr_hookdet); + device_remove_file(&pdev->dev, &dev_attr_enable); + device_remove_file(&pdev->dev, &dev_attr_enable_det); + retu_headset_disable(hs); + retu_headset_det_disable(hs); + free_irq(hs->irq, hs); + input_unregister_device(hs->idev); + input_free_device(hs->idev); + + return 0; +} + +static int retu_headset_suspend(struct platform_device *pdev, + pm_message_t mesg) +{ + struct retu_headset *hs = platform_get_drvdata(pdev); + + mutex_lock(&hs->mutex); + if (hs->bias_enabled) + retu_headset_set_bias(hs, 0); + mutex_unlock(&hs->mutex); + + return 0; +} + +static int retu_headset_resume(struct platform_device *pdev) +{ + struct retu_headset *hs = platform_get_drvdata(pdev); + + mutex_lock(&hs->mutex); + if (hs->bias_enabled) + retu_headset_set_bias(hs, 1); + mutex_unlock(&hs->mutex); + + return 0; +} + +static struct platform_driver retu_headset_driver = { + .remove = retu_headset_remove, + .suspend = retu_headset_suspend, + .resume = retu_headset_resume, + .driver = { + .name = "retu-headset", + }, +}; + +static int __init retu_headset_init(void) +{ + return platform_driver_probe(&retu_headset_driver, retu_headset_probe); +} + +static void __exit retu_headset_exit(void) +{ + platform_driver_unregister(&retu_headset_driver); +} + +module_init(retu_headset_init); +module_exit(retu_headset_exit); + +MODULE_DESCRIPTION("Retu/Vilma headset detection"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juha Yrjölä"); --- /dev/null +++ b/drivers/cbus/retu-pwrbutton.c @@ -0,0 +1,165 @@ +/** + * drivers/cbus/retu-pwrbutton.c + * + * Driver for sending retu power button event to input-layer + * + * Copyright (C) 2004-2010 Nokia Corporation + * + * Written by + * Ari Saastamoinen + * Juha Yrjola + * + * Contact: Felipe Balbi + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "retu.h" + +#define RETU_STATUS_PWRONX (1 << 5) + +#define PWRBTN_DELAY 20 +#define PWRBTN_UP 0 +#define PWRBTN_PRESSED 1 + +struct retu_pwrbutton { + struct input_dev *idev; + struct device *dev; + + int state; + int irq; +}; + +static irqreturn_t retubutton_irq(int irq, void *_pwr) +{ + struct retu_pwrbutton *pwr = _pwr; + int state; + + if (retu_read_reg(pwr->dev, RETU_REG_STATUS) & RETU_STATUS_PWRONX) + state = PWRBTN_UP; + else + state = PWRBTN_PRESSED; + + if (pwr->state != state) { + input_report_key(pwr->idev, KEY_POWER, state); + input_sync(pwr->idev); + pwr->state = state; + } + + return IRQ_HANDLED; +} + +static int __init retubutton_probe(struct platform_device *pdev) +{ + struct retu_pwrbutton *pwr; + int ret = 0; + + pwr = kzalloc(sizeof(*pwr), GFP_KERNEL); + if (!pwr) { + dev_err(&pdev->dev, "not enough memory\n"); + ret = -ENOMEM; + goto err0; + } + + pwr->dev = &pdev->dev; + pwr->irq = platform_get_irq(pdev, 0); + platform_set_drvdata(pdev, pwr); + + ret = request_threaded_irq(pwr->irq, NULL, retubutton_irq, 0, + "retu-pwrbutton", pwr); + if (ret < 0) { + dev_err(&pdev->dev, "Cannot allocate irq\n"); + goto err1; + } + + pwr->idev = input_allocate_device(); + if (!pwr->idev) { + dev_err(&pdev->dev, "can't allocate input device\n"); + ret = -ENOMEM; + goto err2; + } + + pwr->idev->evbit[0] = BIT_MASK(EV_KEY); + pwr->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER); + pwr->idev->name = "retu-pwrbutton"; + + ret = input_register_device(pwr->idev); + if (ret < 0) { + dev_err(&pdev->dev, "failed to register input device\n"); + goto err3; + } + + return 0; + +err3: + input_free_device(pwr->idev); + +err2: + free_irq(pwr->irq, pwr); + +err1: + kfree(pwr); + +err0: + return ret; +} + +static int __exit retubutton_remove(struct platform_device *pdev) +{ + struct retu_pwrbutton *pwr = platform_get_drvdata(pdev); + + free_irq(pwr->irq, pwr); + input_unregister_device(pwr->idev); + input_free_device(pwr->idev); + kfree(pwr); + + return 0; +} + +static struct platform_driver retu_pwrbutton_driver = { + .remove = __exit_p(retubutton_remove), + .driver = { + .name = "retu-pwrbutton", + }, +}; + +static int __init retubutton_init(void) +{ + return platform_driver_probe(&retu_pwrbutton_driver, retubutton_probe); +} +module_init(retubutton_init); + +static void __exit retubutton_exit(void) +{ + platform_driver_unregister(&retu_pwrbutton_driver); +} +module_exit(retubutton_exit); + +MODULE_DESCRIPTION("Retu Power Button"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ari Saastamoinen"); +MODULE_AUTHOR("Felipe Balbi "); + --- /dev/null +++ b/drivers/cbus/retu-rtc.c @@ -0,0 +1,287 @@ +/** + * drivers/cbus/retu-rtc.c + * + * Support for Retu RTC + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Paul Mundt and + * Igor Stoppa + * + * The Retu RTC is essentially a partial read-only RTC that gives us Retu's + * idea of what time actually is. It's left as a userspace excercise to map + * this back to time in the real world and ensure that calibration settings + * are sane to compensate for any horrible drift (on account of not being able + * to set the clock to anything). + * + * Days are semi-writeable. Namely, Retu will only track 255 days for us + * consecutively, after which the counter is explicitly stuck at 255 until + * someone comes along and clears it with a write. In the event that no one + * comes along and clears it, we no longer have any idea what day it is. + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#include "cbus.h" +#include "retu.h" + +struct retu_rtc { + /* device lock */ + struct mutex mutex; + struct device *dev; + struct rtc_device *rtc; + + u16 alarm_expired; + int irq_rtcs; + int irq_rtca; +}; + +static void retu_rtc_do_reset(struct retu_rtc *rtc) +{ + u16 ccr1; + + ccr1 = retu_read_reg(rtc->dev, RETU_REG_CC1); + /* RTC in reset */ + retu_write_reg(rtc->dev, RETU_REG_CC1, ccr1 | 0x0001); + /* RTC in normal operating mode */ + retu_write_reg(rtc->dev, RETU_REG_CC1, ccr1 & ~0x0001); + + /* Disable alarm and RTC WD */ + retu_write_reg(rtc->dev, RETU_REG_RTCHMAR, 0x7f3f); + /* Set Calibration register to default value */ + retu_write_reg(rtc->dev, RETU_REG_RTCCALR, 0x00c0); + + rtc->alarm_expired = 0; +} + +static irqreturn_t retu_rtc_interrupt(int irq, void *_rtc) +{ + struct retu_rtc *rtc = _rtc; + + mutex_lock(&rtc->mutex); + rtc->alarm_expired = 1; + retu_write_reg(rtc->dev, RETU_REG_RTCHMAR, (24 << 8) | 60); + mutex_unlock(&rtc->mutex); + + return IRQ_HANDLED; +} + +static int retu_rtc_init_irq(struct retu_rtc *rtc) +{ + int irq; + int ret; + + irq = platform_get_irq(to_platform_device(rtc->dev), 0); + rtc->irq_rtcs = irq; + + irq = platform_get_irq(to_platform_device(rtc->dev), 1); + rtc->irq_rtca = irq; + + ret = request_threaded_irq(rtc->irq_rtcs, NULL, retu_rtc_interrupt, + 0, "RTCS", rtc); + if (ret != 0) + return ret; + + ret = request_threaded_irq(rtc->irq_rtca, NULL, retu_rtc_interrupt, + 0, "RTCA", rtc); + if (ret != 0) { + free_irq(rtc->irq_rtcs, rtc); + return ret; + } + + return 0; +} + +static int retu_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct retu_rtc *rtc = dev_get_drvdata(dev); + u16 chmar; + + mutex_lock(&rtc->mutex); + + chmar = ((alm->time.tm_hour & 0x1f) << 8) | (alm->time.tm_min & 0x3f); + retu_write_reg(rtc->dev, RETU_REG_RTCHMAR, chmar); + + mutex_unlock(&rtc->mutex); + + return 0; +} + +static int retu_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm) +{ + struct retu_rtc *rtc = dev_get_drvdata(dev); + u16 chmar; + + mutex_lock(&rtc->mutex); + + chmar = retu_read_reg(rtc->dev, RETU_REG_RTCHMAR); + + alm->time.tm_hour = (chmar >> 8) & 0x1f; + alm->time.tm_min = chmar & 0x3f; + alm->enabled = !!rtc->alarm_expired; + + mutex_unlock(&rtc->mutex); + + return 0; +} + +static int retu_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct retu_rtc *rtc = dev_get_drvdata(dev); + u16 dsr; + u16 hmr; + + dsr = ((tm->tm_mday & 0xff) << 8) | (tm->tm_hour & 0xff); + hmr = ((tm->tm_min & 0xff) << 8) | (tm->tm_sec & 0xff); + + mutex_lock(&rtc->mutex); + + retu_write_reg(rtc->dev, RETU_REG_RTCDSR, dsr); + retu_write_reg(rtc->dev, RETU_REG_RTCHMR, hmr); + + mutex_unlock(&rtc->mutex); + + return 0; +} + +static int retu_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct retu_rtc *rtc = dev_get_drvdata(dev); + u16 dsr; + u16 hmr; + + /* + * DSR holds days and hours + * HMR hols minutes and seconds + * + * both are 16 bit registers with 8-bit for each field. + */ + + mutex_lock(&rtc->mutex); + + dsr = retu_read_reg(rtc->dev, RETU_REG_RTCDSR); + hmr = retu_read_reg(rtc->dev, RETU_REG_RTCHMR); + + tm->tm_sec = hmr & 0xff; + tm->tm_min = hmr >> 8; + tm->tm_hour = dsr & 0xff; + tm->tm_mday = dsr >> 8; + + mutex_unlock(&rtc->mutex); + + return 0; +} + +static struct rtc_class_ops retu_rtc_ops = { + .read_time = retu_rtc_read_time, + .set_time = retu_rtc_set_time, + .read_alarm = retu_rtc_read_alarm, + .set_alarm = retu_rtc_set_alarm, +}; + +static int __init retu_rtc_probe(struct platform_device *pdev) +{ + struct retu_rtc *rtc; + int r; + + rtc = kzalloc(sizeof(*rtc), GFP_KERNEL); + if (!rtc) { + dev_err(&pdev->dev, "not enough memory\n"); + r = -ENOMEM; + goto err0; + } + + rtc->dev = &pdev->dev; + platform_set_drvdata(pdev, rtc); + mutex_init(&rtc->mutex); + + rtc->alarm_expired = retu_read_reg(rtc->dev, RETU_REG_IDR) & + (0x1 << RETU_INT_RTCA); + + r = retu_rtc_init_irq(rtc); + if (r < 0) { + dev_err(&pdev->dev, "failed to request retu irq\n"); + goto err1; + } + + /* If the calibration register is zero, we've probably lost power */ + if (!(retu_read_reg(rtc->dev, RETU_REG_RTCCALR) & 0x00ff)) + retu_rtc_do_reset(rtc); + + rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, & + retu_rtc_ops, THIS_MODULE); + if (IS_ERR(rtc->rtc)) { + dev_err(&pdev->dev, "can't register RTC device\n"); + goto err2; + } + + return 0; + +err2: + free_irq(rtc->irq_rtcs, rtc); + free_irq(rtc->irq_rtca, rtc); + +err1: + kfree(rtc); + +err0: + return r; +} + +static int __devexit retu_rtc_remove(struct platform_device *pdev) +{ + struct retu_rtc *rtc = platform_get_drvdata(pdev); + + free_irq(rtc->irq_rtcs, rtc); + free_irq(rtc->irq_rtca, rtc); + rtc_device_unregister(rtc->rtc); + kfree(rtc); + + return 0; +} + +static struct platform_driver retu_rtc_driver = { + .remove = __exit_p(retu_rtc_remove), + .driver = { + .name = "retu-rtc", + }, +}; + +static int __init retu_rtc_init(void) +{ + return platform_driver_probe(&retu_rtc_driver, retu_rtc_probe); +} +module_init(retu_rtc_init); + +static void __exit retu_rtc_exit(void) +{ + platform_driver_unregister(&retu_rtc_driver); +} +module_exit(retu_rtc_exit); + +MODULE_DESCRIPTION("Retu RTC"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Paul Mundt"); +MODULE_AUTHOR("Igor Stoppa"); +MODULE_AUTHOR("Felipe Balbi "); + --- /dev/null +++ b/drivers/cbus/retu-wdt.c @@ -0,0 +1,272 @@ +/** + * drivers/cbus/retu-wdt.c + * + * Driver for Retu watchdog + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Amit Kucheria + * + * Cleanups by Michael Buesch (C) 2011 + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include + +#include + +#include "cbus.h" +#include "retu.h" + +/* Watchdog timeout in seconds */ +#define RETU_WDT_MIN_TIMER 0 +#define RETU_WDT_DEFAULT_TIMER 32 +#define RETU_WDT_MAX_TIMER 63 + +struct retu_wdt_dev { + struct device *dev; + unsigned int period_val; /* Current period of watchdog */ + unsigned long users; + struct miscdevice miscdev; + struct delayed_work ping_work; + struct mutex mutex; +}; + + +static inline void _retu_modify_counter(struct retu_wdt_dev *wdev, + unsigned int new) +{ + retu_write_reg(wdev->dev, RETU_REG_WATCHDOG, (u16)new); +} + +static int retu_modify_counter(struct retu_wdt_dev *wdev, unsigned int new) +{ + if (new < RETU_WDT_MIN_TIMER || new > RETU_WDT_MAX_TIMER) + return -EINVAL; + + mutex_lock(&wdev->mutex); + wdev->period_val = new; + _retu_modify_counter(wdev, wdev->period_val); + mutex_unlock(&wdev->mutex); + + return 0; +} + +/* + * Since retu watchdog cannot be disabled in hardware, we must kick it + * with a timer until userspace watchdog software takes over. Do this + * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set. + */ +static void retu_wdt_ping_enable(struct retu_wdt_dev *wdev) +{ + _retu_modify_counter(wdev, RETU_WDT_MAX_TIMER); + schedule_delayed_work(&wdev->ping_work, + round_jiffies_relative(RETU_WDT_DEFAULT_TIMER * HZ)); +} + +static void retu_wdt_ping_disable(struct retu_wdt_dev *wdev) +{ + _retu_modify_counter(wdev, RETU_WDT_MAX_TIMER); + cancel_delayed_work_sync(&wdev->ping_work); +} + +static void retu_wdt_ping_work(struct work_struct *work) +{ + struct retu_wdt_dev *wdev = container_of(to_delayed_work(work), + struct retu_wdt_dev, ping_work); + retu_wdt_ping_enable(wdev); +} + +static int retu_wdt_open(struct inode *inode, struct file *file) +{ + struct miscdevice *mdev = file->private_data; + struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev); + + if (test_and_set_bit(0, &wdev->users)) + return -EBUSY; + + retu_wdt_ping_disable(wdev); + + return nonseekable_open(inode, file); +} + +static int retu_wdt_release(struct inode *inode, struct file *file) +{ + struct miscdevice *mdev = file->private_data; + struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev); + +#ifndef CONFIG_WATCHDOG_NOWAYOUT + retu_wdt_ping_enable(wdev); +#endif + clear_bit(0, &wdev->users); + + return 0; +} + +static ssize_t retu_wdt_write(struct file *file, const char __user *data, + size_t len, loff_t *ppos) +{ + struct miscdevice *mdev = file->private_data; + struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev); + + if (len) + retu_modify_counter(wdev, RETU_WDT_MAX_TIMER); + + return len; +} + +static long retu_wdt_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + struct miscdevice *mdev = file->private_data; + struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev); + int new_margin; + + static const struct watchdog_info ident = { + .identity = "Retu Watchdog", + .options = WDIOF_SETTIMEOUT, + .firmware_version = 0, + }; + + switch (cmd) { + default: + return -ENOTTY; + case WDIOC_GETSUPPORT: + return copy_to_user((struct watchdog_info __user *)arg, &ident, + sizeof(ident)); + case WDIOC_GETSTATUS: + return put_user(0, (int __user *)arg); + case WDIOC_GETBOOTSTATUS: + if (cpu_is_omap16xx()) + return put_user(omap_readw(ARM_SYSST), + (int __user *)arg); + if (cpu_is_omap24xx()) + return put_user(omap_prcm_get_reset_sources(), + (int __user *)arg); + case WDIOC_KEEPALIVE: + retu_modify_counter(wdev, RETU_WDT_MAX_TIMER); + break; + case WDIOC_SETTIMEOUT: + if (get_user(new_margin, (int __user *)arg)) + return -EFAULT; + retu_modify_counter(wdev, new_margin); + /* Fall through */ + case WDIOC_GETTIMEOUT: + return put_user(wdev->period_val, (int __user *)arg); + } + + return 0; +} + +static const struct file_operations retu_wdt_fops = { + .owner = THIS_MODULE, + .write = retu_wdt_write, + .unlocked_ioctl = retu_wdt_ioctl, + .open = retu_wdt_open, + .release = retu_wdt_release, +}; + +static int __init retu_wdt_probe(struct platform_device *pdev) +{ + struct retu_wdt_dev *wdev; + int ret; + + wdev = kzalloc(sizeof(struct retu_wdt_dev), GFP_KERNEL); + if (!wdev) + return -ENOMEM; + + wdev->dev = &pdev->dev; + wdev->period_val = RETU_WDT_DEFAULT_TIMER; + mutex_init(&wdev->mutex); + + platform_set_drvdata(pdev, wdev); + + wdev->miscdev.parent = &pdev->dev; + wdev->miscdev.minor = WATCHDOG_MINOR; + wdev->miscdev.name = "watchdog"; + wdev->miscdev.fops = &retu_wdt_fops; + + ret = misc_register(&wdev->miscdev); + if (ret) + goto err_free_wdev; + + INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work); + + /* Kick the watchdog for kernel booting to finish. + * If nowayout is not set, we start the ping work. */ +#ifdef CONFIG_WATCHDOG_NOWAYOUT + retu_modify_counter(wdev, RETU_WDT_MAX_TIMER); +#else + retu_wdt_ping_enable(wdev); +#endif + + return 0; + +err_free_wdev: + kfree(wdev); + + return ret; +} + +static int __devexit retu_wdt_remove(struct platform_device *pdev) +{ + struct retu_wdt_dev *wdev; + + wdev = platform_get_drvdata(pdev); + misc_deregister(&wdev->miscdev); + cancel_delayed_work_sync(&wdev->ping_work); + kfree(wdev); + + return 0; +} + +static struct platform_driver retu_wdt_driver = { + .remove = __exit_p(retu_wdt_remove), + .driver = { + .name = "retu-wdt", + }, +}; + +static int __init retu_wdt_init(void) +{ + return platform_driver_probe(&retu_wdt_driver, retu_wdt_probe); +} + +static void __exit retu_wdt_exit(void) +{ + platform_driver_unregister(&retu_wdt_driver); +} + +module_init(retu_wdt_init); +module_exit(retu_wdt_exit); + +MODULE_DESCRIPTION("Retu WatchDog"); +MODULE_AUTHOR("Amit Kucheria"); +MODULE_LICENSE("GPL"); --- /dev/null +++ b/drivers/cbus/tahvo.c @@ -0,0 +1,423 @@ +/** + * drivers/cbus/tahvo.c + * + * Support functions for Tahvo ASIC + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Juha Yrjölä , + * David Weinehall , and + * Mikko Ylinen + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "cbus.h" +#include "tahvo.h" + +struct tahvo { + /* device lock */ + struct mutex mutex; + struct device *dev; + + int irq_base; + int irq_end; + int irq; + + int ack; + int mask; + + unsigned int mask_pending:1; + unsigned int ack_pending:1; + unsigned int is_betty:1; +}; + +/** + * __tahvo_read_reg - Reads a value from a register in Tahvo + * @tahvo: pointer to tahvo structure + * @reg: the register address to read from + */ +static int __tahvo_read_reg(struct tahvo *tahvo, unsigned reg) +{ + return cbus_read_reg(tahvo->dev, CBUS_TAHVO_DEVICE_ID, reg); +} + +/** + * __tahvo_write_reg - Writes a value to a register in Tahvo + * @tahvo: pointer to tahvo structure + * @reg: register address to write to + * @val: the value to be written to @reg + */ +static void __tahvo_write_reg(struct tahvo *tahvo, unsigned reg, u16 val) +{ + cbus_write_reg(tahvo->dev, CBUS_TAHVO_DEVICE_ID, reg, val); +} + +/** + * tahvo_read_reg - Read a value from a register in Tahvo + * @child: device pointer from the calling child + * @reg: the register to read from + * + * This function returns the contents of the specified register + */ +int tahvo_read_reg(struct device *child, unsigned reg) +{ + struct tahvo *tahvo = dev_get_drvdata(child->parent); + + return __tahvo_read_reg(tahvo, reg); +} +EXPORT_SYMBOL(tahvo_read_reg); + +/** + * tahvo_write_reg - Write a value to a register in Tahvo + * @child: device pointer from the calling child + * @reg: the register to write to + * @val : the value to write to the register + * + * This function writes a value to the specified register + */ +void tahvo_write_reg(struct device *child, unsigned reg, u16 val) +{ + struct tahvo *tahvo = dev_get_drvdata(child->parent); + + __tahvo_write_reg(tahvo, reg, val); +} +EXPORT_SYMBOL(tahvo_write_reg); + +/** + * tahvo_set_clear_reg_bits - set and clear register bits atomically + * @child: device pointer from the calling child + * @reg: the register to write to + * @bits: the bits to set + * + * This function sets and clears the specified Tahvo register bits atomically + */ +void tahvo_set_clear_reg_bits(struct device *child, unsigned reg, u16 set, + u16 clear) +{ + struct tahvo *tahvo = dev_get_drvdata(child->parent); + u16 w; + + mutex_lock(&tahvo->mutex); + w = __tahvo_read_reg(tahvo, reg); + w &= ~clear; + w |= set; + __tahvo_write_reg(tahvo, reg, w); + mutex_unlock(&tahvo->mutex); +} + +static irqreturn_t tahvo_irq_handler(int irq, void *_tahvo) +{ + struct tahvo *tahvo = _tahvo; + u16 id; + u16 im; + + id = __tahvo_read_reg(tahvo, TAHVO_REG_IDR); + im = __tahvo_read_reg(tahvo, TAHVO_REG_IMR); + id &= ~im; + + if (!id) { + dev_vdbg(tahvo->dev, "No IRQ, spurious ?\n"); + return IRQ_NONE; + } + + while (id) { + unsigned long pending = __ffs(id); + unsigned int irq; + + id &= ~BIT(pending); + irq = pending + tahvo->irq_base; + handle_nested_irq(irq); + } + + return IRQ_HANDLED; +} + +/* -------------------------------------------------------------------------- */ + +static void tahvo_irq_bus_lock(struct irq_data *data) +{ + struct tahvo *tahvo = irq_data_get_irq_chip_data(data); + + mutex_lock(&tahvo->mutex); +} + +static void tahvo_irq_bus_sync_unlock(struct irq_data *data) +{ + struct tahvo *tahvo = irq_data_get_irq_chip_data(data); + + if (tahvo->mask_pending) { + __tahvo_write_reg(tahvo, TAHVO_REG_IMR, tahvo->mask); + tahvo->mask_pending = false; + } + + if (tahvo->ack_pending) { + __tahvo_write_reg(tahvo, TAHVO_REG_IDR, tahvo->ack); + tahvo->ack_pending = false; + } + + mutex_unlock(&tahvo->mutex); +} + +static void tahvo_irq_mask(struct irq_data *data) +{ + struct tahvo *tahvo = irq_data_get_irq_chip_data(data); + int irq = data->irq; + + tahvo->mask |= (1 << (irq - tahvo->irq_base)); + tahvo->mask_pending = true; +} + +static void tahvo_irq_unmask(struct irq_data *data) +{ + struct tahvo *tahvo = irq_data_get_irq_chip_data(data); + int irq = data->irq; + + tahvo->mask &= ~(1 << (irq - tahvo->irq_base)); + tahvo->mask_pending = true; +} + +static void tahvo_irq_ack(struct irq_data *data) +{ + struct tahvo *tahvo = irq_data_get_irq_chip_data(data); + int irq = data->irq; + + tahvo->ack |= (1 << (irq - tahvo->irq_base)); + tahvo->ack_pending = true; +} + +static struct irq_chip tahvo_irq_chip = { + .name = "tahvo", + .irq_bus_lock = tahvo_irq_bus_lock, + .irq_bus_sync_unlock = tahvo_irq_bus_sync_unlock, + .irq_mask = tahvo_irq_mask, + .irq_unmask = tahvo_irq_unmask, + .irq_ack = tahvo_irq_ack, +}; + +static inline void tahvo_irq_setup(int irq) +{ +#ifdef CONFIG_ARM + set_irq_flags(irq, IRQF_VALID); +#else + irq_set_noprobe(irq); +#endif +} + +static void tahvo_irq_init(struct tahvo *tahvo) +{ + int base = tahvo->irq_base; + int end = tahvo->irq_end; + int irq; + + for (irq = base; irq < end; irq++) { + irq_set_chip_data(irq, tahvo); + irq_set_chip_and_handler(irq, &tahvo_irq_chip, + handle_simple_irq); + irq_set_nested_thread(irq, 1); + tahvo_irq_setup(irq); + } +} + +/* -------------------------------------------------------------------------- */ + +static struct resource generic_resources[] = { + { + .start = -EINVAL, /* fixed later */ + .flags = IORESOURCE_IRQ, + }, +}; + +static struct device *tahvo_allocate_child(const char *name, + struct device *parent, int irq) +{ + struct platform_device *pdev; + int ret; + + pdev = platform_device_alloc(name, -1); + if (!pdev) { + dev_dbg(parent, "can't allocate %s\n", name); + goto err0; + } + + pdev->dev.parent = parent; + + if (irq > 0) { + generic_resources[0].start = irq; + + ret = platform_device_add_resources(pdev, generic_resources, + ARRAY_SIZE(generic_resources)); + if (ret < 0) { + dev_dbg(parent, "can't add resources to %s\n", name); + goto err1; + } + } + + ret = platform_device_add(pdev); + if (ret < 0) { + dev_dbg(parent, "can't add %s\n", name); + goto err1; + } + + return &pdev->dev; + +err1: + platform_device_put(pdev); + +err0: + return NULL; +} + +static int tahvo_allocate_children(struct device *parent, int irq_base) +{ + struct device *child; + + child = tahvo_allocate_child("tahvo-usb", parent, + irq_base + TAHVO_INT_VBUSON); + if (!child) + return -ENOMEM; + + child = tahvo_allocate_child("tahvo-pwm", parent, -1); + if (!child) + return -ENOMEM; + + return 0; +} + +static int __devinit tahvo_probe(struct platform_device *pdev) +{ + struct tahvo *tahvo; + int rev; + int ret; + int irq; + int id; + + tahvo = kzalloc(sizeof(*tahvo), GFP_KERNEL); + if (!tahvo) { + dev_err(&pdev->dev, "not enough memory\n"); + ret = -ENOMEM; + goto err0; + } + + irq = platform_get_irq(pdev, 0); + platform_set_drvdata(pdev, tahvo); + + mutex_init(&tahvo->mutex); + + ret = irq_alloc_descs(-1, 0, MAX_TAHVO_IRQ_HANDLERS, 0); + if (ret < 0) { + dev_err(&pdev->dev, "failed to allocate IRQ descs\n"); + goto err1; + } + + tahvo->irq_base = ret; + tahvo->irq_end = ret + MAX_TAHVO_IRQ_HANDLERS; + tahvo->dev = &pdev->dev; + tahvo->irq = irq; + + tahvo_irq_init(tahvo); + + rev = __tahvo_read_reg(tahvo, TAHVO_REG_ASICR); + + id = (rev >> 8) & 0xff; + + if (id == 0x0b) + tahvo->is_betty = true; + + ret = tahvo_allocate_children(&pdev->dev, tahvo->irq_base); + if (ret < 0) { + dev_err(&pdev->dev, "failed to allocate children\n"); + goto err2; + } + + dev_err(&pdev->dev, "%s v%d.%d found\n", + tahvo->is_betty ? "Betty" : "Tahvo", + (rev >> 4) & 0x0f, rev & 0x0f); + + /* Mask all TAHVO interrupts */ + __tahvo_write_reg(tahvo, TAHVO_REG_IMR, 0xffff); + + ret = request_threaded_irq(irq, NULL, tahvo_irq_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "tahvo", tahvo); + if (ret < 0) { + dev_err(&pdev->dev, "Unable to register IRQ handler\n"); + goto err2; + } + + return 0; + +err2: + irq_free_descs(tahvo->irq_base, MAX_TAHVO_IRQ_HANDLERS); + +err1: + kfree(tahvo); + +err0: + return ret; +} + +static int __devexit tahvo_remove(struct platform_device *pdev) +{ + struct tahvo *tahvo = platform_get_drvdata(pdev); + int irq; + + irq = platform_get_irq(pdev, 0); + + free_irq(irq, 0); + irq_free_descs(tahvo->irq_base, MAX_TAHVO_IRQ_HANDLERS); + kfree(tahvo); + + return 0; +} + +static struct platform_driver tahvo_driver = { + .probe = tahvo_probe, + .remove = __devexit_p(tahvo_remove), + .driver = { + .name = "tahvo", + }, +}; + +static int __init tahvo_init(void) +{ + return platform_driver_register(&tahvo_driver); +} +subsys_initcall(tahvo_init); + +static void __exit tahvo_exit(void) +{ + platform_driver_unregister(&tahvo_driver); +} +module_exit(tahvo_exit); + +MODULE_DESCRIPTION("Tahvo ASIC control"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juha Yrjölä"); +MODULE_AUTHOR("David Weinehall"); +MODULE_AUTHOR("Mikko Ylinen"); + --- /dev/null +++ b/drivers/cbus/tahvo.h @@ -0,0 +1,58 @@ +/* + * drivers/cbus/tahvo.h + * + * Copyright (C) 2004, 2005 Nokia Corporation + * + * Written by Juha Yrjölä and + * David Weinehall + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 + */ + +#ifndef __DRIVERS_CBUS_TAHVO_H +#define __DRIVERS_CBUS_TAHVO_H + +#include + +/* Registers */ +#define TAHVO_REG_ASICR 0x00 /* ASIC ID & revision */ +#define TAHVO_REG_IDR 0x01 /* Interrupt ID */ +#define TAHVO_REG_IDSR 0x02 /* Interrupt status */ +#define TAHVO_REG_IMR 0x03 /* Interrupt mask */ +#define TAHVO_REG_CHGCURR 0x04 /* Charge current control PWM (8-bit) */ +#define TAHVO_REG_LEDPWMR 0x05 /* LED PWM */ +#define TAHVO_REG_USBR 0x06 /* USB control */ +#define TAHVO_REG_CHGCTL 0x08 /* Charge control register */ +#define TAHVO_REG_CHGCTL_EN 0x0001 /* Global charge enable */ +#define TAHVO_REG_CHGCTL_PWMOVR 0x0004 /* PWM override. Force charge PWM to 0%/100% duty cycle. */ +#define TAHVO_REG_CHGCTL_PWMOVRZERO 0x0008 /* If set, PWM override is 0% (If unset -> 100%) */ +#define TAHVO_REG_CHGCTL_CURMEAS 0x0040 /* Enable battery current measurement. */ +#define TAHVO_REG_CHGCTL_CURTIMRST 0x0080 /* Current measure timer reset. */ +#define TAHVO_REG_BATCURRTIMER 0x0c /* Battery current measure timer (8-bit) */ +#define TAHVO_REG_BATCURR 0x0d /* Battery (dis)charge current (signed 16-bit) */ + +#define TAHVO_REG_MAX 0x0d + +/* Interrupt sources */ +#define TAHVO_INT_VBUSON 0 +#define TAHVO_INT_BATCURR 7 /* Battery current measure timer */ + +#define MAX_TAHVO_IRQ_HANDLERS 8 + +int tahvo_read_reg(struct device *child, unsigned reg); +void tahvo_write_reg(struct device *child, unsigned reg, u16 val); +void tahvo_set_clear_reg_bits(struct device *child, unsigned reg, u16 set, + u16 clear); + +#endif /* __DRIVERS_CBUS_TAHVO_H */ --- /dev/null +++ b/drivers/cbus/tahvo-usb.c @@ -0,0 +1,740 @@ +/** + * drivers/cbus/tahvo-usb.c + * + * Tahvo USB transeiver + * + * Copyright (C) 2005-2006 Nokia Corporation + * + * Parts copied from drivers/i2c/chips/isp1301_omap.c + * Copyright (C) 2004 Texas Instruments + * Copyright (C) 2004 David Brownell + * + * Written by Juha Yrjölä , + * Tony Lindgren , and + * Timo Teräs + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "cbus.h" +#include "tahvo.h" + +#define DRIVER_NAME "tahvo-usb" + +#define USBR_SLAVE_CONTROL (1 << 8) +#define USBR_VPPVIO_SW (1 << 7) +#define USBR_SPEED (1 << 6) +#define USBR_REGOUT (1 << 5) +#define USBR_MASTER_SW2 (1 << 4) +#define USBR_MASTER_SW1 (1 << 3) +#define USBR_SLAVE_SW (1 << 2) +#define USBR_NSUSPEND (1 << 1) +#define USBR_SEMODE (1 << 0) + +/* bits in OTG_CTRL */ + +/* Bits that are controlled by OMAP OTG and are read-only */ +#define OTG_CTRL_OMAP_MASK (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|\ + OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) +/* Bits that are controlled by transceiver */ +#define OTG_CTRL_XCVR_MASK (OTG_ASESSVLD|OTG_BSESSEND|\ + OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) +/* Bits that are controlled by system */ +#define OTG_CTRL_SYS_MASK (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|\ + OTG_B_HNPEN|OTG_BUSDROP) + +#if defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OTG) +#error tahvo-otg.c does not work with OCHI yet! +#endif + +#define TAHVO_MODE_HOST 0 +#define TAHVO_MODE_PERIPHERAL 1 + +#ifdef CONFIG_USB_OTG +#define TAHVO_MODE(tu) (tu)->tahvo_mode +#elif defined(CONFIG_USB_GADGET_OMAP) +#define TAHVO_MODE(tu) TAHVO_MODE_PERIPHERAL +#else +#define TAHVO_MODE(tu) TAHVO_MODE_HOST +#endif + +struct tahvo_usb { + struct device *dev; + struct platform_device *pt_dev; + struct otg_transceiver otg; + int vbus_state; + struct mutex serialize; +#ifdef CONFIG_USB_OTG + int tahvo_mode; +#endif + struct clk *ick; + + int irq; +}; +static struct tahvo_usb *tahvo_usb_device; + +/* + * --------------------------------------------------------------------------- + * OTG related functions + * + * These shoud be separated into omap-otg.c driver module, as they are used + * by various transceivers. These functions are needed in the UDC-only case + * as well. These functions are copied from GPL isp1301_omap.c + * --------------------------------------------------------------------------- + */ +static struct platform_device *tahvo_otg_dev; + +static irqreturn_t omap_otg_irq(int irq, void *arg) +{ + u16 otg_irq; + + otg_irq = omap_readw(OTG_IRQ_SRC); + if (otg_irq & OPRT_CHG) { + omap_writew(OPRT_CHG, OTG_IRQ_SRC); + } else if (otg_irq & B_SRP_TMROUT) { + omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); + } else if (otg_irq & B_HNP_FAIL) { + omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); + } else if (otg_irq & A_SRP_DETECT) { + omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); + } else if (otg_irq & A_REQ_TMROUT) { + omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); + } else if (otg_irq & A_VBUS_ERR) { + omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); + } else if (otg_irq & DRIVER_SWITCH) { +#ifdef CONFIG_USB_OTG + if ((!(omap_readl(OTG_CTRL) & OTG_DRIVER_SEL)) && + tu->otg.host && tu->otg.state == OTG_STATE_A_HOST) { + /* role is host */ + usb_bus_start_enum(tu->otg.host, + tu->otg.host->otg_port); + } +#endif + omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); + } else + return IRQ_NONE; + + return IRQ_HANDLED; + +} + +static int tahvo_otg_init(void) +{ + u32 l; + +#ifdef CONFIG_USB_OTG + if (!tahvo_otg_dev) { + printk("tahvo-usb: no tahvo_otg_dev\n"); + return -ENODEV; + } +#endif + + l = omap_readl(OTG_SYSCON_1); + l &= ~OTG_IDLE_EN; + omap_writel(l, OTG_SYSCON_1); + udelay(100); + + /* some of these values are board-specific... */ + l = omap_readl(OTG_SYSCON_2); + l |= OTG_EN + /* for B-device: */ + | SRP_GPDATA /* 9msec Bdev D+ pulse */ + | SRP_GPDVBUS /* discharge after VBUS pulse */ + // | (3 << 24) /* 2msec VBUS pulse */ + /* for A-device: */ + | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ + | SRP_DPW /* detect 167+ns SRP pulses */ + | SRP_DATA | SRP_VBUS; /* accept both kinds of SRP pulse */ + omap_writel(l, OTG_SYSCON_2); + + omap_writew(DRIVER_SWITCH | OPRT_CHG + | B_SRP_TMROUT | B_HNP_FAIL + | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, + OTG_IRQ_EN); + l = omap_readl(OTG_SYSCON_2); + l |= OTG_EN; + omap_writel(l, OTG_SYSCON_2); + + return 0; +} + +static int __init omap_otg_probe(struct platform_device *pdev) +{ + int ret; + + tahvo_otg_dev = pdev; + ret = tahvo_otg_init(); + if (ret != 0) { + printk(KERN_ERR "tahvo-usb: tahvo_otg_init failed\n"); + return ret; + } + + return request_irq(tahvo_otg_dev->resource[1].start, + omap_otg_irq, IRQF_DISABLED, DRIVER_NAME, + tahvo_usb_device); +} + +static int __exit omap_otg_remove(struct platform_device *pdev) +{ + free_irq(tahvo_otg_dev->resource[1].start, tahvo_usb_device); + tahvo_otg_dev = NULL; + + return 0; +} + +struct platform_driver omap_otg_driver = { + .driver = { + .name = "omap_otg", + }, + .remove = __exit_p(omap_otg_remove), +}; + +/* + * --------------------------------------------------------------------------- + * Tahvo related functions + * These are Nokia proprietary code, except for the OTG register settings, + * which are copied from isp1301.c + * --------------------------------------------------------------------------- + */ +static ssize_t vbus_state_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct tahvo_usb *tu = dev_get_drvdata(device); + return sprintf(buf, "%d\n", tu->vbus_state); +} +static DEVICE_ATTR(vbus_state, 0444, vbus_state_show, NULL); + +int vbus_active = 0; + +static void check_vbus_state(struct tahvo_usb *tu) +{ + int reg, prev_state; + + reg = tahvo_read_reg(tu->dev, TAHVO_REG_IDSR); + if (reg & 0x01) { + u32 l; + + vbus_active = 1; + switch (tu->otg.state) { + case OTG_STATE_B_IDLE: + /* Enable the gadget driver */ + if (tu->otg.gadget) + usb_gadget_vbus_connect(tu->otg.gadget); + /* Set B-session valid and not B-sessio ended to indicate + * Vbus to be ok. */ + l = omap_readl(OTG_CTRL); + l &= ~OTG_BSESSEND; + l |= OTG_BSESSVLD; + omap_writel(l, OTG_CTRL); + + tu->otg.state = OTG_STATE_B_PERIPHERAL; + break; + case OTG_STATE_A_IDLE: + /* Session is now valid assuming the USB hub is driving Vbus */ + tu->otg.state = OTG_STATE_A_HOST; + break; + default: + break; + } + printk("USB cable connected\n"); + } else { + switch (tu->otg.state) { + case OTG_STATE_B_PERIPHERAL: + if (tu->otg.gadget) + usb_gadget_vbus_disconnect(tu->otg.gadget); + tu->otg.state = OTG_STATE_B_IDLE; + break; + case OTG_STATE_A_HOST: + tu->otg.state = OTG_STATE_A_IDLE; + break; + default: + break; + } + printk("USB cable disconnected\n"); + vbus_active = 0; + } + + prev_state = tu->vbus_state; + tu->vbus_state = reg & 0x01; + if (prev_state != tu->vbus_state) + sysfs_notify(&tu->pt_dev->dev.kobj, NULL, "vbus_state"); +} + +static void tahvo_usb_become_host(struct tahvo_usb *tu) +{ + u32 l; + + /* Clear system and transceiver controlled bits + * also mark the A-session is always valid */ + tahvo_otg_init(); + + l = omap_readl(OTG_CTRL); + l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK); + l |= OTG_ASESSVLD; + omap_writel(l, OTG_CTRL); + + /* Power up the transceiver in USB host mode */ + tahvo_write_reg(tu->dev, TAHVO_REG_USBR, USBR_REGOUT | USBR_NSUSPEND | + USBR_MASTER_SW2 | USBR_MASTER_SW1); + tu->otg.state = OTG_STATE_A_IDLE; + + check_vbus_state(tu); +} + +static void tahvo_usb_stop_host(struct tahvo_usb *tu) +{ + tu->otg.state = OTG_STATE_A_IDLE; +} + +static void tahvo_usb_become_peripheral(struct tahvo_usb *tu) +{ + u32 l; + + /* Clear system and transceiver controlled bits + * and enable ID to mark peripheral mode and + * BSESSEND to mark no Vbus */ + tahvo_otg_init(); + l = omap_readl(OTG_CTRL); + l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK | OTG_BSESSVLD); + l |= OTG_ID | OTG_BSESSEND; + omap_writel(l, OTG_CTRL); + + /* Power up transceiver and set it in USB perhiperal mode */ + tahvo_write_reg(tu->dev, TAHVO_REG_USBR, USBR_SLAVE_CONTROL | USBR_REGOUT | USBR_NSUSPEND | USBR_SLAVE_SW); + tu->otg.state = OTG_STATE_B_IDLE; + + check_vbus_state(tu); +} + +static void tahvo_usb_stop_peripheral(struct tahvo_usb *tu) +{ + u32 l; + + l = omap_readl(OTG_CTRL); + l &= ~OTG_BSESSVLD; + l |= OTG_BSESSEND; + omap_writel(l, OTG_CTRL); + + if (tu->otg.gadget) + usb_gadget_vbus_disconnect(tu->otg.gadget); + tu->otg.state = OTG_STATE_B_IDLE; + +} + +static void tahvo_usb_power_off(struct tahvo_usb *tu) +{ + u32 l; + int id; + + /* Disable gadget controller if any */ + if (tu->otg.gadget) + usb_gadget_vbus_disconnect(tu->otg.gadget); + + /* Disable OTG and interrupts */ + if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL) + id = OTG_ID; + else + id = 0; + l = omap_readl(OTG_CTRL); + l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK | OTG_BSESSVLD); + l |= id | OTG_BSESSEND; + omap_writel(l, OTG_CTRL); + omap_writew(0, OTG_IRQ_EN); + + l = omap_readl(OTG_SYSCON_2); + l &= ~OTG_EN; + omap_writel(l, OTG_SYSCON_2); + + l = omap_readl(OTG_SYSCON_1); + l |= OTG_IDLE_EN; + omap_writel(l, OTG_SYSCON_1); + + /* Power off transceiver */ + tahvo_write_reg(tu->dev, TAHVO_REG_USBR, 0); + tu->otg.state = OTG_STATE_UNDEFINED; +} + + +static int tahvo_usb_set_power(struct otg_transceiver *dev, unsigned mA) +{ + struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg); + + dev_dbg(&tu->pt_dev->dev, "set_power %d mA\n", mA); + + if (dev->state == OTG_STATE_B_PERIPHERAL) { + /* REVISIT: Can Tahvo charge battery from VBUS? */ + } + return 0; +} + +static int tahvo_usb_set_suspend(struct otg_transceiver *dev, int suspend) +{ + struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg); + u16 w; + + dev_dbg(&tu->pt_dev->dev, "set_suspend\n"); + + w = tahvo_read_reg(tu->dev, TAHVO_REG_USBR); + if (suspend) + w &= ~USBR_NSUSPEND; + else + w |= USBR_NSUSPEND; + tahvo_write_reg(tu->dev, TAHVO_REG_USBR, w); + + return 0; +} + +static int tahvo_usb_start_srp(struct otg_transceiver *dev) +{ + struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg); + u32 otg_ctrl; + + dev_dbg(&tu->pt_dev->dev, "start_srp\n"); + + if (!dev || tu->otg.state != OTG_STATE_B_IDLE) + return -ENODEV; + + otg_ctrl = omap_readl(OTG_CTRL); + if (!(otg_ctrl & OTG_BSESSEND)) + return -EINVAL; + + otg_ctrl |= OTG_B_BUSREQ; + otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_SYS_MASK; + omap_writel(otg_ctrl, OTG_CTRL); + tu->otg.state = OTG_STATE_B_SRP_INIT; + + return 0; +} + +static int tahvo_usb_start_hnp(struct otg_transceiver *otg) +{ + struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg); + + dev_dbg(&tu->pt_dev->dev, "start_hnp\n"); +#ifdef CONFIG_USB_OTG + /* REVISIT: Add this for OTG */ +#endif + return -EINVAL; +} + +static int tahvo_usb_set_host(struct otg_transceiver *otg, struct usb_bus *host) +{ + struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg); + u32 l; + + dev_dbg(&tu->pt_dev->dev, "set_host %p\n", host); + + if (otg == NULL) + return -ENODEV; + +#if defined(CONFIG_USB_OTG) || !defined(CONFIG_USB_GADGET_OMAP) + + mutex_lock(&tu->serialize); + + if (host == NULL) { + if (TAHVO_MODE(tu) == TAHVO_MODE_HOST) + tahvo_usb_power_off(tu); + tu->otg.host = NULL; + mutex_unlock(&tu->serialize); + return 0; + } + + l = omap_readl(OTG_SYSCON_1); + l &= ~(OTG_IDLE_EN | HST_IDLE_EN | DEV_IDLE_EN); + omap_writel(l, OTG_SYSCON_1); + + if (TAHVO_MODE(tu) == TAHVO_MODE_HOST) { + tu->otg.host = NULL; + tahvo_usb_become_host(tu); + } + + tu->otg.host = host; + + mutex_unlock(&tu->serialize); +#else + /* No host mode configured, so do not allow host controlled to be set */ + return -EINVAL; +#endif + + return 0; +} + +static int tahvo_usb_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) +{ + struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg); + + dev_dbg(&tu->pt_dev->dev, "set_peripheral %p\n", gadget); + + if (!otg) + return -ENODEV; + +#if defined(CONFIG_USB_OTG) || defined(CONFIG_USB_GADGET_OMAP) + + mutex_lock(&tu->serialize); + + if (!gadget) { + if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL) + tahvo_usb_power_off(tu); + tu->otg.gadget = NULL; + mutex_unlock(&tu->serialize); + return 0; + } + + tu->otg.gadget = gadget; + if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL) + tahvo_usb_become_peripheral(tu); + + mutex_unlock(&tu->serialize); +#else + /* No gadget mode configured, so do not allow host controlled to be set */ + return -EINVAL; +#endif + + return 0; +} + +static irqreturn_t tahvo_usb_vbus_interrupt(int irq, void *_tu) +{ + struct tahvo_usb *tu = _tu; + + check_vbus_state(tu); + + return IRQ_HANDLED; +} + +#ifdef CONFIG_USB_OTG +static ssize_t otg_mode_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct tahvo_usb *tu = dev_get_drvdata(device); + switch (tu->tahvo_mode) { + case TAHVO_MODE_HOST: + return sprintf(buf, "host\n"); + case TAHVO_MODE_PERIPHERAL: + return sprintf(buf, "peripheral\n"); + } + return sprintf(buf, "unknown\n"); +} + +static ssize_t otg_mode_store(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct tahvo_usb *tu = dev_get_drvdata(device); + int r; + + r = strlen(buf); + mutex_lock(&tu->serialize); + if (strncmp(buf, "host", 4) == 0) { + if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL) + tahvo_usb_stop_peripheral(tu); + tu->tahvo_mode = TAHVO_MODE_HOST; + if (tu->otg.host) { + printk(KERN_INFO "Selected HOST mode: host controller present.\n"); + tahvo_usb_become_host(tu); + } else { + printk(KERN_INFO "Selected HOST mode: no host controller, powering off.\n"); + tahvo_usb_power_off(tu); + } + } else if (strncmp(buf, "peripheral", 10) == 0) { + if (tu->tahvo_mode == TAHVO_MODE_HOST) + tahvo_usb_stop_host(tu); + tu->tahvo_mode = TAHVO_MODE_PERIPHERAL; + if (tu->otg.gadget) { + printk(KERN_INFO "Selected PERIPHERAL mode: gadget driver present.\n"); + tahvo_usb_become_peripheral(tu); + } else { + printk(KERN_INFO "Selected PERIPHERAL mode: no gadget driver, powering off.\n"); + tahvo_usb_power_off(tu); + } + } else + r = -EINVAL; + + mutex_unlock(&tu->serialize); + return r; +} + +static DEVICE_ATTR(otg_mode, 0644, otg_mode_show, otg_mode_store); +#endif + +static int __init tahvo_usb_probe(struct platform_device *pdev) +{ + struct tahvo_usb *tu; + struct device *dev = &pdev->dev; + int ret; + int irq; + + dev_dbg(dev, "probe\n"); + + /* Create driver data */ + tu = kzalloc(sizeof(*tu), GFP_KERNEL); + if (!tu) + return -ENOMEM; + tahvo_usb_device = tu; + + tu->dev = dev; + tu->pt_dev = pdev; +#ifdef CONFIG_USB_OTG + /* Default mode */ +#ifdef CONFIG_CBUS_TAHVO_USB_HOST_BY_DEFAULT + tu->tahvo_mode = TAHVO_MODE_HOST; +#else + tu->tahvo_mode = TAHVO_MODE_PERIPHERAL; +#endif +#endif + + mutex_init(&tu->serialize); + + tu->ick = clk_get(NULL, "usb_l4_ick"); + if (IS_ERR(tu->ick)) { + dev_err(dev, "Failed to get usb_l4_ick\n"); + ret = PTR_ERR(tu->ick); + goto err_free_tu; + } + clk_enable(tu->ick); + + /* Set initial state, so that we generate kevents only on + * state changes */ + tu->vbus_state = tahvo_read_reg(tu->dev, TAHVO_REG_IDSR) & 0x01; + + irq = platform_get_irq(pdev, 0); + tu->irq = irq; + + /* We cannot enable interrupt until omap_udc is initialized */ + ret = request_threaded_irq(irq, NULL, tahvo_usb_vbus_interrupt, + IRQF_ONESHOT, "tahvo-vbus", tu); + if (ret != 0) { + printk(KERN_ERR "Could not register Tahvo interrupt for VBUS\n"); + goto err_release_clk; + } + + /* Attributes */ + ret = device_create_file(dev, &dev_attr_vbus_state); +#ifdef CONFIG_USB_OTG + ret |= device_create_file(dev, &dev_attr_otg_mode); +#endif + if (ret) + printk(KERN_ERR "attribute creation failed: %d\n", ret); + + /* Create OTG interface */ + tahvo_usb_power_off(tu); + tu->otg.state = OTG_STATE_UNDEFINED; + tu->otg.label = DRIVER_NAME; + tu->otg.set_host = tahvo_usb_set_host; + tu->otg.set_peripheral = tahvo_usb_set_peripheral; + tu->otg.set_power = tahvo_usb_set_power; + tu->otg.set_suspend = tahvo_usb_set_suspend; + tu->otg.start_srp = tahvo_usb_start_srp; + tu->otg.start_hnp = tahvo_usb_start_hnp; + + ret = otg_set_transceiver(&tu->otg); + if (ret < 0) { + printk(KERN_ERR "Cannot register USB transceiver\n"); + goto err_free_irq; + } + + dev_set_drvdata(dev, tu); + + return 0; + +err_free_irq: + free_irq(tu->irq, tu); +err_release_clk: + clk_disable(tu->ick); + clk_put(tu->ick); +err_free_tu: + kfree(tu); + tahvo_usb_device = NULL; + + return ret; +} + +static int __exit tahvo_usb_remove(struct platform_device *pdev) +{ + struct tahvo_usb *tu = platform_get_drvdata(pdev); + + dev_dbg(&pdev->dev, "remove\n"); + + free_irq(tu->irq, tu); + flush_scheduled_work(); + otg_set_transceiver(0); + device_remove_file(&pdev->dev, &dev_attr_vbus_state); +#ifdef CONFIG_USB_OTG + device_remove_file(&pdev->dev, &dev_attr_otg_mode); +#endif + clk_disable(tu->ick); + clk_put(tu->ick); + + kfree(tu); + tahvo_usb_device = NULL; + + return 0; +} + +static struct platform_driver tahvo_usb_driver = { + .driver = { + .name = "tahvo-usb", + }, + .remove = __exit_p(tahvo_usb_remove), +}; + +static int __init tahvo_usb_init(void) +{ + int ret = 0; + + ret = platform_driver_probe(&tahvo_usb_driver, tahvo_usb_probe); + if (ret) + return ret; + + ret = platform_driver_probe(&omap_otg_driver, omap_otg_probe); + if (ret) { + platform_driver_unregister(&tahvo_usb_driver); + return ret; + } + + return 0; +} + +subsys_initcall(tahvo_usb_init); + +static void __exit tahvo_usb_exit(void) +{ + platform_driver_unregister(&omap_otg_driver); + platform_driver_unregister(&tahvo_usb_driver); +} +module_exit(tahvo_usb_exit); + +MODULE_DESCRIPTION("Tahvo USB OTG Transceiver Driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juha Yrjölä, Tony Lindgren, and Timo Teräs"); --- a/drivers/Makefile +++ b/drivers/Makefile @@ -78,7 +78,7 @@ obj-$(CONFIG_GAMEPORT) += input/gamepor obj-$(CONFIG_INPUT) += input/ obj-$(CONFIG_I2O) += message/ obj-$(CONFIG_RTC_LIB) += rtc/ -obj-y += i2c/ media/ +obj-y += i2c/ media/ cbus/ obj-$(CONFIG_PPS) += pps/ obj-$(CONFIG_PTP_1588_CLOCK) += ptp/ obj-$(CONFIG_W1) += w1/ --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -2,6 +2,8 @@ menu "Device Drivers" source "drivers/base/Kconfig" +source "drivers/cbus/Kconfig" + source "drivers/connector/Kconfig" source "drivers/mtd/Kconfig"