--- /dev/null
+--- /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 <felipe.balbi@nokia.com>
++ *
++ * Written by Juha Yrjölä <juha.yrjola@nokia.com>,
++ * David Weinehall <david.weinehall@nokia.com>, and
++ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
++ *
++ * Several updates and cleanups by Felipe Balbi <felipe.balbi@nokia.com>
++ *
++ * 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 <linux/device.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/export.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++#include <linux/spinlock.h>
++#include <linux/gpio.h>
++#include <linux/platform_device.h>
++#include <linux/platform_data/cbus.h>
++
++#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 <felipe.balbi@nokia.com>");
++
+--- /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 <juha.yrjola@nokia.com> and
++ * David Weinehall <david.weinehall@nokia.com>
++ *
++ * 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 <juha.yrjola@nokia.com>,
++ * David Weinehall <david.weinehall@nokia.com>, and
++ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
++ *
++ * 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 <linux/module.h>
++#include <linux/init.h>
++
++#include <linux/slab.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/device.h>
++#include <linux/mutex.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++#include <linux/platform_data/cbus.h>
++
++#include <asm/bitops.h>
++
++#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 <juha.yrjola@nokia.com> and
++ * David Weinehall <david.weinehall@nokia.com>
++ *
++ * 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 <linux/types.h>
++
++/* 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 <linux/module.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <linux/delay.h>
++#include <linux/input.h>
++#include <linux/platform_device.h>
++
++#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 <ari.saastamoinen@elektrobit.com>
++ * Juha Yrjola <juha.yrjola@solidboot.com>
++ *
++ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
++ *
++ * 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 <linux/module.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/input.h>
++#include <linux/jiffies.h>
++#include <linux/bitops.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++
++#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 <felipe.balbi@nokia.com>");
++
+--- /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 <paul.mundt@nokia.com> and
++ * Igor Stoppa <igor.stoppa@nokia.com>
++ *
++ * 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 <linux/device.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/slab.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/mutex.h>
++#include <linux/rtc.h>
++
++#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 <felipe.balbi@nokia.com>");
++
+--- /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 <amit.kucheria@nokia.com>
++ *
++ * Cleanups by Michael Buesch <mb@bu3sch.de> (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 <linux/kernel.h>
++#include <linux/slab.h>
++#include <linux/module.h>
++#include <linux/device.h>
++#include <linux/init.h>
++#include <linux/fs.h>
++#include <linux/io.h>
++#include <linux/platform_device.h>
++
++#include <linux/completion.h>
++#include <linux/errno.h>
++#include <linux/moduleparam.h>
++#include <linux/miscdevice.h>
++#include <linux/watchdog.h>
++
++#include <asm/uaccess.h>
++
++#include <plat/prcm.h>
++
++#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 <juha.yrjola@nokia.com>,
++ * David Weinehall <david.weinehall@nokia.com>, and
++ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
++ *
++ * 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 <linux/module.h>
++#include <linux/init.h>
++
++#include <linux/slab.h>
++#include <linux/kernel.h>
++#include <linux/errno.h>
++#include <linux/device.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++#include <linux/platform_data/cbus.h>
++#include <linux/mutex.h>
++
++#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 <juha.yrjola@nokia.com> and
++ * David Weinehall <david.weinehall@nokia.com>
++ *
++ * 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 <linux/types.h>
++
++/* 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 <juha.yrjola@nokia.com>,
++ * Tony Lindgren <tony@atomide.com>, and
++ * Timo Teräs <timo.teras@nokia.com>
++ *
++ * 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 <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/io.h>
++#include <linux/interrupt.h>
++#include <linux/platform_device.h>
++#include <linux/usb/ch9.h>
++#include <linux/usb/gadget.h>
++#include <linux/usb.h>
++#include <linux/usb/otg.h>
++#include <linux/i2c.h>
++#include <linux/workqueue.h>
++#include <linux/kobject.h>
++#include <linux/clk.h>
++#include <linux/mutex.h>
++
++#include <asm/irq.h>
++#include <plat/usb.h>
++
++#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"
projects / openwrt.git / blobdiff