Root/target/linux/omap24xx/patches-3.3/250-cbus.patch

1--- /dev/null
2+++ b/drivers/cbus/cbus.c
3@@ -0,0 +1,335 @@
4+/*
5+ * drivers/cbus/cbus.c
6+ *
7+ * Support functions for CBUS serial protocol
8+ *
9+ * Copyright (C) 2004-2010 Nokia Corporation
10+ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
11+ *
12+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>,
13+ * David Weinehall <david.weinehall@nokia.com>, and
14+ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
15+ *
16+ * Several updates and cleanups by Felipe Balbi <felipe.balbi@nokia.com>
17+ *
18+ * This file is subject to the terms and conditions of the GNU General
19+ * Public License. See the file "COPYING" in the main directory of this
20+ * archive for more details.
21+ *
22+ * This program is distributed in the hope that it will be useful,
23+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
24+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25+ * GNU General Public License for more details.
26+ *
27+ * You should have received a copy of the GNU General Public License
28+ * along with this program; if not, write to the Free Software
29+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30+ */
31+
32+#include <linux/device.h>
33+#include <linux/init.h>
34+#include <linux/kernel.h>
35+#include <linux/export.h>
36+#include <linux/module.h>
37+#include <linux/slab.h>
38+#include <linux/spinlock.h>
39+#include <linux/gpio.h>
40+#include <linux/platform_device.h>
41+#include <linux/platform_data/cbus.h>
42+
43+#include "cbus.h"
44+
45+#define CBUS_XFER_READ 1
46+#define CBUS_XFER_WRITE 0
47+
48+struct cbus_host {
49+ /* host lock */
50+ spinlock_t lock;
51+
52+ struct device *dev;
53+
54+ int clk_gpio;
55+ int dat_gpio;
56+ int sel_gpio;
57+};
58+
59+/**
60+ * cbus_send_bit - sends one bit over the bus
61+ * @host: the host we're using
62+ * @bit: one bit of information to send
63+ * @input: whether to set data pin as input after sending
64+ */
65+static int cbus_send_bit(struct cbus_host *host, unsigned bit,
66+ unsigned input)
67+{
68+ int ret = 0;
69+
70+ gpio_set_value(host->dat_gpio, bit ? 1 : 0);
71+ gpio_set_value(host->clk_gpio, 1);
72+
73+ /* The data bit is read on the rising edge of CLK */
74+ if (input)
75+ ret = gpio_direction_input(host->dat_gpio);
76+
77+ gpio_set_value(host->clk_gpio, 0);
78+
79+ return ret;
80+}
81+
82+/**
83+ * cbus_send_data - sends @len amount of data over the bus
84+ * @host: the host we're using
85+ * @data: the data to send
86+ * @len: size of the transfer
87+ * @input: whether to set data pin as input after sending
88+ */
89+static int cbus_send_data(struct cbus_host *host, unsigned data, unsigned len,
90+ unsigned input)
91+{
92+ int ret = 0;
93+ int i;
94+
95+ for (i = len; i > 0; i--) {
96+ ret = cbus_send_bit(host, data & (1 << (i - 1)),
97+ input && (i == 1));
98+ if (ret < 0)
99+ goto out;
100+ }
101+
102+out:
103+ return ret;
104+}
105+
106+/**
107+ * cbus_receive_bit - receives one bit from the bus
108+ * @host: the host we're using
109+ */
110+static int cbus_receive_bit(struct cbus_host *host)
111+{
112+ int ret;
113+
114+ gpio_set_value(host->clk_gpio, 1);
115+ ret = gpio_get_value(host->dat_gpio);
116+ if (ret < 0)
117+ goto out;
118+ gpio_set_value(host->clk_gpio, 0);
119+
120+out:
121+ return ret;
122+}
123+
124+/**
125+ * cbus_receive_data - receives @len data from the bus
126+ * @host: the host we're using
127+ * @len: the length of data to receive
128+ */
129+static int cbus_receive_data(struct cbus_host *host, unsigned len)
130+{
131+ int ret = 0;
132+ int i;
133+
134+ for (i = 16; i > 0; i--) {
135+ int bit = cbus_receive_bit(host);
136+
137+ if (bit < 0)
138+ goto out;
139+
140+ if (bit)
141+ ret |= 1 << (i - 1);
142+ }
143+
144+out:
145+ return ret;
146+}
147+
148+/**
149+ * cbus_transfer - transfers data over the bus
150+ * @host: the host we're using
151+ * @rw: read/write flag
152+ * @dev: device address
153+ * @reg: register address
154+ * @data: if @rw == 0 data to send otherwise 0
155+ */
156+static int cbus_transfer(struct cbus_host *host, unsigned rw, unsigned dev,
157+ unsigned reg, unsigned data)
158+{
159+ unsigned long flags;
160+ int input = 0;
161+ int ret = 0;
162+
163+ /* We don't want interrupts disturbing our transfer */
164+ spin_lock_irqsave(&host->lock, flags);
165+
166+ /* Reset state and start of transfer, SEL stays down during transfer */
167+ gpio_set_value(host->sel_gpio, 0);
168+
169+ /* Set the DAT pin to output */
170+ gpio_direction_output(host->dat_gpio, 1);
171+
172+ /* Send the device address */
173+ ret = cbus_send_data(host, dev, 3, 0);
174+ if (ret < 0) {
175+ dev_dbg(host->dev, "failed sending device addr\n");
176+ goto out;
177+ }
178+
179+ /* Send the rw flag */
180+ ret = cbus_send_bit(host, rw, 0);
181+ if (ret < 0) {
182+ dev_dbg(host->dev, "failed sending read/write flag\n");
183+ goto out;
184+ }
185+
186+ /* Send the register address */
187+ if (rw)
188+ input = true;
189+
190+ ret = cbus_send_data(host, reg, 5, input);
191+ if (ret < 0) {
192+ dev_dbg(host->dev, "failed sending register addr\n");
193+ goto out;
194+ }
195+
196+ if (!rw) {
197+ ret = cbus_send_data(host, data, 16, 0);
198+ if (ret < 0) {
199+ dev_dbg(host->dev, "failed sending data\n");
200+ goto out;
201+ }
202+ } else {
203+ gpio_set_value(host->clk_gpio, 1);
204+
205+ ret = cbus_receive_data(host, 16);
206+ if (ret < 0) {
207+ dev_dbg(host->dev, "failed receiving data\n");
208+ goto out;
209+ }
210+ }
211+
212+ /* Indicate end of transfer, SEL goes up until next transfer */
213+ gpio_set_value(host->sel_gpio, 1);
214+ gpio_set_value(host->clk_gpio, 1);
215+ gpio_set_value(host->clk_gpio, 0);
216+
217+out:
218+ spin_unlock_irqrestore(&host->lock, flags);
219+
220+ return ret;
221+}
222+
223+/**
224+ * cbus_read_reg - reads a given register from the device
225+ * @child: the child device
226+ * @dev: device address
227+ * @reg: register address
228+ */
229+int cbus_read_reg(struct device *child, unsigned dev, unsigned reg)
230+{
231+ struct cbus_host *host = dev_get_drvdata(child->parent);
232+
233+ return cbus_transfer(host, CBUS_XFER_READ, dev, reg, 0);
234+}
235+EXPORT_SYMBOL(cbus_read_reg);
236+
237+/**
238+ * cbus_write_reg - writes to a given register of the device
239+ * @child: the child device
240+ * @dev: device address
241+ * @reg: register address
242+ * @val: data to be written to @reg
243+ */
244+int cbus_write_reg(struct device *child, unsigned dev, unsigned reg,
245+ unsigned val)
246+{
247+ struct cbus_host *host = dev_get_drvdata(child->parent);
248+
249+ return cbus_transfer(host, CBUS_XFER_WRITE, dev, reg, val);
250+}
251+EXPORT_SYMBOL(cbus_write_reg);
252+
253+static int __init cbus_bus_probe(struct platform_device *pdev)
254+{
255+ struct cbus_host *chost;
256+ struct cbus_host_platform_data *pdata = pdev->dev.platform_data;
257+ int ret;
258+
259+ chost = kzalloc(sizeof(*chost), GFP_KERNEL);
260+ if (chost == NULL)
261+ return -ENOMEM;
262+
263+ spin_lock_init(&chost->lock);
264+
265+ chost->clk_gpio = pdata->clk_gpio;
266+ chost->dat_gpio = pdata->dat_gpio;
267+ chost->sel_gpio = pdata->sel_gpio;
268+ chost->dev = &pdev->dev;
269+
270+ ret = gpio_request(chost->clk_gpio, "CBUS clk");
271+ if (ret < 0)
272+ goto exit1;
273+
274+ ret = gpio_request(chost->dat_gpio, "CBUS data");
275+ if (ret < 0)
276+ goto exit2;
277+
278+ ret = gpio_request(chost->sel_gpio, "CBUS sel");
279+ if (ret < 0)
280+ goto exit3;
281+
282+ gpio_direction_output(chost->clk_gpio, 0);
283+ gpio_direction_input(chost->dat_gpio);
284+ gpio_direction_output(chost->sel_gpio, 1);
285+
286+ gpio_set_value(chost->clk_gpio, 1);
287+ gpio_set_value(chost->clk_gpio, 0);
288+
289+ platform_set_drvdata(pdev, chost);
290+
291+ return 0;
292+exit3:
293+ gpio_free(chost->dat_gpio);
294+exit2:
295+ gpio_free(chost->clk_gpio);
296+exit1:
297+ kfree(chost);
298+
299+ return ret;
300+}
301+
302+static void __exit cbus_bus_remove(struct platform_device *pdev)
303+{
304+ struct cbus_host *chost = platform_get_drvdata(pdev);
305+
306+ gpio_free(chost->sel_gpio);
307+ gpio_free(chost->dat_gpio);
308+ gpio_free(chost->clk_gpio);
309+
310+ kfree(chost);
311+}
312+
313+static struct platform_driver cbus_driver = {
314+ .remove = __exit_p(cbus_bus_remove),
315+ .driver = {
316+ .name = "cbus",
317+ },
318+};
319+
320+static int __init cbus_bus_init(void)
321+{
322+ return platform_driver_probe(&cbus_driver, cbus_bus_probe);
323+}
324+subsys_initcall(cbus_bus_init);
325+
326+static void __exit cbus_bus_exit(void)
327+{
328+ platform_driver_unregister(&cbus_driver);
329+}
330+module_exit(cbus_bus_exit);
331+
332+MODULE_DESCRIPTION("CBUS serial protocol");
333+MODULE_LICENSE("GPL");
334+MODULE_AUTHOR("Juha Yrjölä");
335+MODULE_AUTHOR("David Weinehall");
336+MODULE_AUTHOR("Mikko Ylinen");
337+MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
338+
339--- /dev/null
340+++ b/drivers/cbus/cbus.h
341@@ -0,0 +1,30 @@
342+/*
343+ * drivers/cbus/cbus.h
344+ *
345+ * Copyright (C) 2004, 2005 Nokia Corporation
346+ *
347+ * Written by Juha Yrjölä <juha.yrjola@nokia.com> and
348+ * David Weinehall <david.weinehall@nokia.com>
349+ *
350+ * This file is subject to the terms and conditions of the GNU General
351+ * Public License. See the file "COPYING" in the main directory of this
352+ * archive for more details.
353+ *
354+ * This program is distributed in the hope that it will be useful,
355+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
356+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
357+ * GNU General Public License for more details.
358+ *
359+ * You should have received a copy of the GNU General Public License
360+ * along with this program; if not, write to the Free Software
361+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
362+ */
363+
364+#ifndef __DRIVERS_CBUS_CBUS_H
365+#define __DRIVERS_CBUS_CBUS_H
366+
367+extern int cbus_read_reg(struct device *, unsigned dev, unsigned reg);
368+extern int cbus_write_reg(struct device *, unsigned dev, unsigned reg,
369+ unsigned val);
370+
371+#endif /* __DRIVERS_CBUS_CBUS_H */
372--- /dev/null
373+++ b/drivers/cbus/Kconfig
374@@ -0,0 +1,86 @@
375+#
376+# CBUS device configuration
377+#
378+
379+menu "CBUS support"
380+
381+config CBUS
382+ bool "CBUS support on OMAP"
383+ ---help---
384+ CBUS is a proprietary serial protocol by Nokia. It is mainly
385+ used for accessing Energy Management auxiliary chips.
386+
387+ If you want CBUS support, you should say Y here.
388+
389+config CBUS_TAHVO
390+ depends on CBUS
391+ bool "Support for Tahvo"
392+ ---help---
393+ Tahvo is a mixed signal ASIC with some system features
394+
395+ If you want Tahvo support, you should say Y here.
396+
397+if CBUS_TAHVO
398+
399+config CBUS_TAHVO_USB
400+ depends on USB
401+ depends on ARCH_OMAP
402+ select USB_OTG_UTILS
403+ tristate "Support for Tahvo USB transceiver"
404+ ---help---
405+ If you want Tahvo support for USB transceiver, say Y or M here.
406+
407+config CBUS_TAHVO_USB_HOST_BY_DEFAULT
408+ depends on CBUS_TAHVO_USB && USB_OTG
409+ boolean "Device in USB host mode by default"
410+ ---help---
411+ Say Y here, if you want the device to enter USB host mode
412+ by default on bootup.
413+
414+endif # CBUS_TAHVO
415+
416+config CBUS_RETU
417+ depends on CBUS
418+ bool "Support for Retu"
419+ ---help---
420+ Retu is a mixed signal ASIC with some system features
421+
422+ If you want Retu support, you should say Y here.
423+
424+if CBUS_RETU
425+
426+config CBUS_RETU_POWERBUTTON
427+ depends on INPUT
428+ bool "Support for Retu power button"
429+ ---help---
430+ The power button on Nokia 770 is connected to the Retu ASIC.
431+
432+ If you want support for the Retu power button, you should say Y here.
433+
434+config CBUS_RETU_RTC
435+ depends on RTC_CLASS
436+ depends on ARCH_OMAP
437+ tristate "Support for Retu pseudo-RTC"
438+ ---help---
439+ Say Y here if you want support for the device that alleges to be an
440+ RTC in Retu. This will expose a sysfs interface for it.
441+
442+config CBUS_RETU_WDT
443+ depends on SYSFS && WATCHDOG
444+ depends on ARCH_OMAP
445+ tristate "Support for Retu watchdog timer"
446+ ---help---
447+ Say Y here if you want support for the watchdog in Retu. This will
448+ expose a sysfs interface to grok it.
449+
450+config CBUS_RETU_HEADSET
451+ depends on SYSFS
452+ tristate "Support for headset detection with Retu/Vilma"
453+ ---help---
454+ Say Y here if you want support detecting a headset that's connected
455+ to Retu/Vilma. Detection state and events are exposed through
456+ sysfs.
457+
458+endif # CBUS_RETU
459+
460+endmenu
461--- /dev/null
462+++ b/drivers/cbus/Makefile
463@@ -0,0 +1,13 @@
464+#
465+# Makefile for CBUS.
466+#
467+
468+obj-$(CONFIG_CBUS) += cbus.o
469+obj-$(CONFIG_CBUS_TAHVO) += tahvo.o
470+obj-$(CONFIG_CBUS_RETU) += retu.o
471+obj-$(CONFIG_CBUS_TAHVO_USB) += tahvo-usb.o
472+
473+obj-$(CONFIG_CBUS_RETU_POWERBUTTON) += retu-pwrbutton.o
474+obj-$(CONFIG_CBUS_RETU_RTC) += retu-rtc.o
475+obj-$(CONFIG_CBUS_RETU_WDT) += retu-wdt.o
476+obj-$(CONFIG_CBUS_RETU_HEADSET) += retu-headset.o
477--- /dev/null
478+++ b/drivers/cbus/retu.c
479@@ -0,0 +1,549 @@
480+/**
481+ * drivers/cbus/retu.c
482+ *
483+ * Support functions for Retu ASIC
484+ *
485+ * Copyright (C) 2004, 2005 Nokia Corporation
486+ *
487+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>,
488+ * David Weinehall <david.weinehall@nokia.com>, and
489+ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
490+ *
491+ * This file is subject to the terms and conditions of the GNU General
492+ * Public License. See the file "COPYING" in the main directory of this
493+ * archive for more details.
494+ *
495+ * This program is distributed in the hope that it will be useful,
496+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
497+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
498+ * GNU General Public License for more details.
499+ *
500+ * You should have received a copy of the GNU General Public License
501+ * along with this program; if not, write to the Free Software
502+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
503+ */
504+
505+#include <linux/module.h>
506+#include <linux/init.h>
507+
508+#include <linux/slab.h>
509+#include <linux/kernel.h>
510+#include <linux/errno.h>
511+#include <linux/device.h>
512+#include <linux/mutex.h>
513+#include <linux/irq.h>
514+#include <linux/interrupt.h>
515+#include <linux/platform_device.h>
516+#include <linux/platform_data/cbus.h>
517+
518+#include <asm/bitops.h>
519+
520+#include "cbus.h"
521+#include "retu.h"
522+
523+struct retu {
524+ /* Device lock */
525+ struct mutex mutex;
526+ struct device *dev;
527+
528+ int devid;
529+
530+ int irq_base;
531+ int irq_end;
532+
533+ int irq;
534+
535+ int ack;
536+ bool ack_pending;
537+
538+ int mask;
539+ bool mask_pending;
540+
541+ bool is_vilma;
542+};
543+
544+static struct retu *the_retu;
545+
546+/**
547+ * __retu_read_reg - Read a value from a register in Retu
548+ * @retu: pointer to retu structure
549+ * @reg: the register address to read from
550+ */
551+static int __retu_read_reg(struct retu *retu, unsigned reg)
552+{
553+ return cbus_read_reg(retu->dev, retu->devid, reg);
554+}
555+
556+/**
557+ * __retu_write_reg - Writes a value to a register in Retu
558+ * @retu: pointer to retu structure
559+ * @reg: the register address to write to
560+ * @val: the value to write to the register
561+ */
562+static void __retu_write_reg(struct retu *retu, unsigned reg, u16 val)
563+{
564+ cbus_write_reg(retu->dev, retu->devid, reg, val);
565+}
566+
567+/**
568+ * retu_read_reg - Read a value from a register in Retu
569+ * @child: device pointer for the calling child
570+ * @reg: the register to read from
571+ *
572+ * This function returns the contents of the specified register
573+ */
574+int retu_read_reg(struct device *child, unsigned reg)
575+{
576+ struct retu *retu = dev_get_drvdata(child->parent);
577+
578+ return __retu_read_reg(retu, reg);
579+}
580+EXPORT_SYMBOL_GPL(retu_read_reg);
581+
582+/**
583+ * retu_write_reg - Write a value to a register in Retu
584+ * @child: the pointer to our calling child
585+ * @reg: the register to write to
586+ * @val: the value to write to the register
587+ *
588+ * This function writes a value to the specified register
589+ */
590+void retu_write_reg(struct device *child, unsigned reg, u16 val)
591+{
592+ struct retu *retu = dev_get_drvdata(child->parent);
593+
594+ mutex_lock(&retu->mutex);
595+ __retu_write_reg(retu, reg, val);
596+ mutex_unlock(&retu->mutex);
597+}
598+EXPORT_SYMBOL_GPL(retu_write_reg);
599+
600+/**
601+ * retu_set_clear_reg_bits - helper function to read/set/clear bits
602+ * @child: device pointer to calling child
603+ * @reg: the register address
604+ * @set: mask for setting bits
605+ * @clear: mask for clearing bits
606+ */
607+void retu_set_clear_reg_bits(struct device *child, unsigned reg, u16 set,
608+ u16 clear)
609+{
610+ struct retu *retu = dev_get_drvdata(child->parent);
611+ u16 w;
612+
613+ mutex_lock(&retu->mutex);
614+ w = __retu_read_reg(retu, reg);
615+ w &= ~clear;
616+ w |= set;
617+ __retu_write_reg(retu, reg, w);
618+ mutex_unlock(&retu->mutex);
619+}
620+EXPORT_SYMBOL_GPL(retu_set_clear_reg_bits);
621+
622+#define ADC_MAX_CHAN_NUMBER 13
623+
624+/**
625+ * retu_read_adc - Reads AD conversion result
626+ * @child: device pointer to calling child
627+ * @channel: the ADC channel to read from
628+ */
629+int retu_read_adc(struct device *child, int channel)
630+{
631+ struct retu *retu = dev_get_drvdata(child->parent);
632+ int res;
633+
634+ if (!retu)
635+ return -ENODEV;
636+
637+ if (channel < 0 || channel > ADC_MAX_CHAN_NUMBER)
638+ return -EINVAL;
639+
640+ mutex_lock(&retu->mutex);
641+
642+ if ((channel == 8) && retu->is_vilma) {
643+ int scr = __retu_read_reg(retu, RETU_REG_ADCSCR);
644+ int ch = (__retu_read_reg(retu, RETU_REG_ADCR) >> 10) & 0xf;
645+ if (((scr & 0xff) != 0) && (ch != 8))
646+ __retu_write_reg(retu, RETU_REG_ADCSCR, (scr & ~0xff));
647+ }
648+
649+ /* Select the channel and read result */
650+ __retu_write_reg(retu, RETU_REG_ADCR, channel << 10);
651+ res = __retu_read_reg(retu, RETU_REG_ADCR) & 0x3ff;
652+
653+ if (retu->is_vilma)
654+ __retu_write_reg(retu, RETU_REG_ADCR, (1 << 13));
655+
656+ /* Unlock retu */
657+ mutex_unlock(&retu->mutex);
658+
659+ return res;
660+}
661+EXPORT_SYMBOL_GPL(retu_read_adc);
662+
663+static irqreturn_t retu_irq_handler(int irq, void *_retu)
664+{
665+ struct retu *retu = _retu;
666+
667+ u16 idr;
668+ u16 imr;
669+
670+ mutex_lock(&retu->mutex);
671+ idr = __retu_read_reg(retu, RETU_REG_IDR);
672+ imr = __retu_read_reg(retu, RETU_REG_IMR);
673+ mutex_unlock(&retu->mutex);
674+
675+ idr &= ~imr;
676+ if (!idr) {
677+ dev_vdbg(retu->dev, "No IRQ, spurious?\n");
678+ return IRQ_NONE;
679+ }
680+
681+ while (idr) {
682+ unsigned long pending = __ffs(idr);
683+ unsigned int irq;
684+
685+ idr &= ~BIT(pending);
686+ irq = pending + retu->irq_base;
687+ handle_nested_irq(irq);
688+ }
689+
690+ return IRQ_HANDLED;
691+}
692+
693+/* -------------------------------------------------------------------------- */
694+
695+static void retu_irq_mask(struct irq_data *data)
696+{
697+ struct retu *retu = irq_data_get_irq_chip_data(data);
698+ int irq = data->irq;
699+
700+ retu->mask |= (1 << (irq - retu->irq_base));
701+ retu->mask_pending = true;
702+}
703+
704+static void retu_irq_unmask(struct irq_data *data)
705+{
706+ struct retu *retu = irq_data_get_irq_chip_data(data);
707+ int irq = data->irq;
708+
709+ retu->mask &= ~(1 << (irq - retu->irq_base));
710+ retu->mask_pending = true;
711+
712+}
713+
714+static void retu_irq_ack(struct irq_data *data)
715+{
716+ struct retu *retu = irq_data_get_irq_chip_data(data);
717+ int irq = data->irq;
718+
719+ retu->ack |= (1 << (irq - retu->irq_base));
720+ retu->ack_pending = true;
721+}
722+
723+static void retu_bus_lock(struct irq_data *data)
724+{
725+ struct retu *retu = irq_data_get_irq_chip_data(data);
726+
727+ mutex_lock(&retu->mutex);
728+}
729+
730+static void retu_bus_sync_unlock(struct irq_data *data)
731+{
732+ struct retu *retu = irq_data_get_irq_chip_data(data);
733+
734+ if (retu->mask_pending) {
735+ __retu_write_reg(retu, RETU_REG_IMR, retu->mask);
736+ retu->mask_pending = false;
737+ }
738+
739+ if (retu->ack_pending) {
740+ __retu_write_reg(retu, RETU_REG_IDR, retu->ack);
741+ retu->ack_pending = false;
742+ }
743+
744+ mutex_unlock(&retu->mutex);
745+}
746+
747+static struct irq_chip retu_irq_chip = {
748+ .name = "retu",
749+ .irq_bus_lock = retu_bus_lock,
750+ .irq_bus_sync_unlock = retu_bus_sync_unlock,
751+ .irq_mask = retu_irq_mask,
752+ .irq_unmask = retu_irq_unmask,
753+ .irq_ack = retu_irq_ack,
754+};
755+
756+static inline void retu_irq_setup(int irq)
757+{
758+#ifdef CONFIG_ARM
759+ set_irq_flags(irq, IRQF_VALID);
760+#else
761+ irq_set_noprobe(irq);
762+#endif
763+}
764+
765+static void retu_irq_init(struct retu *retu)
766+{
767+ int base = retu->irq_base;
768+ int end = retu->irq_end;
769+ int irq;
770+
771+ for (irq = base; irq < end; irq++) {
772+ irq_set_chip_data(irq, retu);
773+ irq_set_chip_and_handler(irq, &retu_irq_chip,
774+ handle_simple_irq);
775+ irq_set_nested_thread(irq, 1);
776+ retu_irq_setup(irq);
777+ }
778+}
779+
780+static void retu_irq_exit(struct retu *retu)
781+{
782+ int base = retu->irq_base;
783+ int end = retu->irq_end;
784+ int irq;
785+
786+ for (irq = base; irq < end; irq++) {
787+#ifdef CONFIG_ARM
788+ set_irq_flags(irq, 0);
789+#endif
790+ irq_set_chip_and_handler(irq, NULL, NULL);
791+ irq_set_chip_data(irq, NULL);
792+ }
793+}
794+
795+/* -------------------------------------------------------------------------- */
796+
797+/**
798+ * retu_power_off - Shut down power to system
799+ *
800+ * This function puts the system in power off state
801+ */
802+static void retu_power_off(void)
803+{
804+ struct retu *retu = the_retu;
805+ unsigned reg;
806+
807+ reg = __retu_read_reg(retu, RETU_REG_CC1);
808+
809+ /* Ignore power button state */
810+ __retu_write_reg(retu, RETU_REG_CC1, reg | 2);
811+ /* Expire watchdog immediately */
812+ __retu_write_reg(retu, RETU_REG_WATCHDOG, 0);
813+ /* Wait for poweroff*/
814+ for (;;);
815+}
816+
817+static struct resource generic_resources[] = {
818+ {
819+ .start = -EINVAL, /* fixed later */
820+ .flags = IORESOURCE_IRQ,
821+ },
822+ {
823+ .start = -EINVAL, /* fixed later */
824+ .flags = IORESOURCE_IRQ,
825+ },
826+};
827+
828+/**
829+ * retu_allocate_child - Allocates one Retu child
830+ * @name: name of new child
831+ * @parent: parent device for this child
832+ */
833+static struct device *retu_allocate_child(char *name, struct device *parent,
834+ int irq_base, int irq1, int irq2, int num)
835+{
836+ struct platform_device *pdev;
837+ int status;
838+
839+ pdev = platform_device_alloc(name, -1);
840+ if (!pdev) {
841+ dev_dbg(parent, "can't allocate %s\n", name);
842+ goto err;
843+ }
844+
845+ pdev->dev.parent = parent;
846+
847+ if (num) {
848+ generic_resources[0].start = irq_base + irq1;
849+ generic_resources[1].start = irq_base + irq2;
850+
851+ status = platform_device_add_resources(pdev,
852+ generic_resources, num);
853+ if (status < 0) {
854+ dev_dbg(parent, "can't add resources to %s\n", name);
855+ goto err;
856+ }
857+ }
858+
859+ status = platform_device_add(pdev);
860+ if (status < 0) {
861+ dev_dbg(parent, "can't add %s\n", name);
862+ goto err;
863+ }
864+
865+ return &pdev->dev;
866+
867+err:
868+ platform_device_put(pdev);
869+
870+ return NULL;
871+}
872+
873+/**
874+ * retu_allocate_children - Allocates Retu's children
875+ */
876+static int retu_allocate_children(struct device *parent, int irq_base)
877+{
878+ struct device *child;
879+
880+ child = retu_allocate_child("retu-pwrbutton", parent, irq_base,
881+ RETU_INT_PWR, -1, 1);
882+ if (!child)
883+ return -ENOMEM;
884+
885+ child = retu_allocate_child("retu-headset", parent, irq_base,
886+ RETU_INT_HOOK, -1, 1);
887+ if (!child)
888+ return -ENOMEM;
889+
890+ child = retu_allocate_child("retu-rtc", parent, irq_base,
891+ RETU_INT_RTCS, RETU_INT_RTCA, 2);
892+ if (!child)
893+ return -ENOMEM;
894+
895+ child = retu_allocate_child("retu-wdt", parent, -1, -1, -1, 0);
896+ if (!child)
897+ return -ENOMEM;
898+
899+ return 0;
900+}
901+
902+/**
903+ * retu_probe - Probe for Retu ASIC
904+ * @dev: the Retu device
905+ *
906+ * Probe for the Retu ASIC and allocate memory
907+ * for its device-struct if found
908+ */
909+static int __devinit retu_probe(struct platform_device *pdev)
910+{
911+ struct retu *retu;
912+ struct cbus_retu_platform_data *pdata = pdev->dev.platform_data;
913+
914+ int ret = -ENOMEM;
915+ int rev;
916+
917+ retu = kzalloc(sizeof(*retu), GFP_KERNEL);
918+ if (!retu) {
919+ dev_err(&pdev->dev, "not enough memory\n");
920+ goto err0;
921+ }
922+
923+ platform_set_drvdata(pdev, retu);
924+
925+ ret = irq_alloc_descs(-1, 0, MAX_RETU_IRQ_HANDLERS, 0);
926+ if (ret < 0) {
927+ dev_err(&pdev->dev, "failed to allocate IRQ descs\n");
928+ goto err1;
929+ }
930+
931+ retu->irq = platform_get_irq(pdev, 0);
932+ retu->irq_base = ret;
933+ retu->irq_end = ret + MAX_RETU_IRQ_HANDLERS;
934+ retu->devid = pdata->devid;
935+ retu->dev = &pdev->dev;
936+ the_retu = retu;
937+
938+ mutex_init(&retu->mutex);
939+
940+ retu_irq_init(retu);
941+
942+ rev = __retu_read_reg(retu, RETU_REG_ASICR) & 0xff;
943+ if (rev & (1 << 7))
944+ retu->is_vilma = true;
945+
946+ dev_info(&pdev->dev, "%s v%d.%d found\n",
947+ retu->is_vilma ? "Vilma" : "Retu",
948+ (rev >> 4) & 0x07, rev & 0x0f);
949+
950+ /* Mask all RETU interrupts */
951+ __retu_write_reg(retu, RETU_REG_IMR, 0xffff);
952+
953+ ret = request_threaded_irq(retu->irq, NULL, retu_irq_handler,
954+ IRQF_ONESHOT, "retu", retu);
955+ if (ret < 0) {
956+ dev_err(&pdev->dev, "Unable to register IRQ handler\n");
957+ goto err2;
958+ }
959+
960+ irq_set_irq_wake(retu->irq, 1);
961+
962+ /* Register power off function */
963+ pm_power_off = retu_power_off;
964+
965+ ret = retu_allocate_children(&pdev->dev, retu->irq_base);
966+ if (ret < 0) {
967+ dev_err(&pdev->dev, "Unable to allocate Retu children\n");
968+ goto err3;
969+ }
970+
971+ return 0;
972+
973+err3:
974+ pm_power_off = NULL;
975+ free_irq(retu->irq, retu);
976+
977+err2:
978+ retu_irq_exit(retu);
979+ irq_free_descs(retu->irq_base, MAX_RETU_IRQ_HANDLERS);
980+
981+err1:
982+ kfree(retu);
983+ the_retu = NULL;
984+
985+err0:
986+ return ret;
987+}
988+
989+static int __devexit retu_remove(struct platform_device *pdev)
990+{
991+ struct retu *retu = platform_get_drvdata(pdev);
992+
993+ pm_power_off = NULL;
994+ the_retu = NULL;
995+
996+ free_irq(retu->irq, retu);
997+ retu_irq_exit(retu);
998+ irq_free_descs(retu->irq_base, MAX_RETU_IRQ_HANDLERS);
999+ kfree(retu);
1000+
1001+ return 0;
1002+}
1003+
1004+static struct platform_driver retu_driver = {
1005+ .probe = retu_probe,
1006+ .remove = __devexit_p(retu_remove),
1007+ .driver = {
1008+ .name = "retu",
1009+ },
1010+};
1011+
1012+static int __init retu_init(void)
1013+{
1014+ return platform_driver_register(&retu_driver);
1015+}
1016+subsys_initcall(retu_init);
1017+
1018+static void __exit retu_exit(void)
1019+{
1020+ platform_driver_unregister(&retu_driver);
1021+}
1022+module_exit(retu_exit);
1023+
1024+MODULE_DESCRIPTION("Retu ASIC control");
1025+MODULE_LICENSE("GPL");
1026+MODULE_AUTHOR("Juha Yrjölä");
1027+MODULE_AUTHOR("David Weinehall");
1028+MODULE_AUTHOR("Mikko Ylinen");
1029--- /dev/null
1030+++ b/drivers/cbus/retu.h
1031@@ -0,0 +1,85 @@
1032+/**
1033+ * drivers/cbus/retu.h
1034+ *
1035+ * Copyright (C) 2004, 2005 Nokia Corporation
1036+ *
1037+ * Written by Juha Yrjölä <juha.yrjola@nokia.com> and
1038+ * David Weinehall <david.weinehall@nokia.com>
1039+ *
1040+ * This file is subject to the terms and conditions of the GNU General
1041+ * Public License. See the file "COPYING" in the main directory of this
1042+ * archive for more details.
1043+ *
1044+ * This program is distributed in the hope that it will be useful,
1045+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
1046+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1047+ * GNU General Public License for more details.
1048+
1049+ * You should have received a copy of the GNU General Public License
1050+ * along with this program; if not, write to the Free Software
1051+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1052+ */
1053+
1054+#ifndef __DRIVERS_CBUS_RETU_H
1055+#define __DRIVERS_CBUS_RETU_H
1056+
1057+#include <linux/types.h>
1058+
1059+/* Registers */
1060+#define RETU_REG_ASICR 0x00 /* ASIC ID & revision */
1061+#define RETU_REG_IDR 0x01 /* Interrupt ID */
1062+#define RETU_REG_IMR 0x02 /* Interrupt mask */
1063+#define RETU_REG_RTCDSR 0x03 /* RTC seconds register */
1064+#define RETU_REG_RTCHMR 0x04 /* RTC hours and minutes register */
1065+#define RETU_REG_RTCHMAR 0x05 /* RTC hours and minutes alarm and time set register */
1066+#define RETU_REG_RTCCALR 0x06 /* RTC calibration register */
1067+#define RETU_REG_ADCR 0x08 /* ADC result */
1068+#define RETU_REG_ADCSCR 0x09 /* ADC sample ctrl */
1069+#define RETU_REG_CC1 0x0d /* Common control register 1 */
1070+#define RETU_REG_CC2 0x0e /* Common control register 2 */
1071+#define RETU_REG_CTRL_CLR 0x0f /* Regulator clear register */
1072+#define RETU_REG_CTRL_SET 0x10 /* Regulator set register */
1073+#define RETU_REG_STATUS 0x16 /* Status register */
1074+#define RETU_REG_STATUS_BATAVAIL 0x0100 /* Battery available */
1075+#define RETU_REG_STATUS_CHGPLUG 0x1000 /* Charger is plugged in */
1076+#define RETU_REG_WATCHDOG 0x17 /* Watchdog register */
1077+#define RETU_REG_AUDTXR 0x18 /* Audio Codec Tx register */
1078+#define RETU_REG_MAX 0x1f
1079+
1080+/* Interrupt sources */
1081+#define RETU_INT_PWR 0
1082+#define RETU_INT_CHAR 1
1083+#define RETU_INT_RTCS 2
1084+#define RETU_INT_RTCM 3
1085+#define RETU_INT_RTCD 4
1086+#define RETU_INT_RTCA 5
1087+#define RETU_INT_HOOK 6
1088+#define RETU_INT_HEAD 7
1089+#define RETU_INT_ADCS 8
1090+
1091+#define MAX_RETU_IRQ_HANDLERS 16
1092+
1093+/* ADC channels */
1094+#define RETU_ADC_GND 0x00 /* Ground */
1095+#define RETU_ADC_BSI 0x01 /* Battery Size Indicator */
1096+#define RETU_ADC_BATTEMP 0x02 /* Battery temperature */
1097+#define RETU_ADC_CHGVOLT 0x03 /* Charger voltage */
1098+#define RETU_ADC_HEADSET 0x04 /* Headset detection */
1099+#define RETU_ADC_HOOKDET 0x05 /* Hook detection */
1100+#define RETU_ADC_RFGP 0x06 /* RF GP */
1101+#define RETU_ADC_WBTX 0x07 /* Wideband Tx detection */
1102+#define RETU_ADC_BATTVOLT 0x08 /* Battery voltage measurement */
1103+#define RETU_ADC_GND2 0x09 /* Ground */
1104+#define RETU_ADC_LIGHTSENS 0x0A /* Light sensor */
1105+#define RETU_ADC_LIGHTTEMP 0x0B /* Light sensor temperature */
1106+#define RETU_ADC_BKUPVOLT 0x0C /* Backup battery voltage */
1107+#define RETU_ADC_TEMP 0x0D /* RETU temperature */
1108+
1109+
1110+int retu_read_reg(struct device *child, unsigned reg);
1111+void retu_write_reg(struct device *child, unsigned reg, u16 val);
1112+void retu_set_clear_reg_bits(struct device *child, unsigned reg, u16 set,
1113+ u16 clear);
1114+int retu_read_adc(struct device *child, int channel);
1115+
1116+#endif /* __DRIVERS_CBUS_RETU_H */
1117--- /dev/null
1118+++ b/drivers/cbus/retu-headset.c
1119@@ -0,0 +1,359 @@
1120+/**
1121+ * Retu/Vilma headset detection
1122+ *
1123+ * Copyright (C) 2006 Nokia Corporation
1124+ *
1125+ * Written by Juha Yrjölä
1126+ *
1127+ * This file is subject to the terms and conditions of the GNU General
1128+ * Public License. See the file "COPYING" in the main directory of this
1129+ * archive for more details.
1130+ *
1131+ * This program is distributed in the hope that it will be useful,
1132+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
1133+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1134+ * GNU General Public License for more details.
1135+ *
1136+ * You should have received a copy of the GNU General Public License
1137+ * along with this program; if not, write to the Free Software
1138+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1139+ */
1140+
1141+#include <linux/module.h>
1142+#include <linux/init.h>
1143+#include <linux/kernel.h>
1144+#include <linux/irq.h>
1145+#include <linux/interrupt.h>
1146+#include <linux/slab.h>
1147+#include <linux/delay.h>
1148+#include <linux/input.h>
1149+#include <linux/platform_device.h>
1150+
1151+#include "retu.h"
1152+
1153+#define RETU_ADC_CHANNEL_HOOKDET 0x05
1154+
1155+#define RETU_HEADSET_KEY KEY_PHONE
1156+
1157+struct retu_headset {
1158+ spinlock_t lock;
1159+ struct mutex mutex;
1160+ struct device *dev;
1161+ struct input_dev *idev;
1162+ unsigned bias_enabled;
1163+ unsigned detection_enabled;
1164+ unsigned pressed;
1165+ struct timer_list enable_timer;
1166+ struct timer_list detect_timer;
1167+ int irq;
1168+};
1169+
1170+static void retu_headset_set_bias(struct retu_headset *hs, int enable)
1171+{
1172+ if (enable) {
1173+ retu_set_clear_reg_bits(hs->dev, RETU_REG_AUDTXR,
1174+ (1 << 0) | (1 << 1), 0);
1175+ msleep(2);
1176+ retu_set_clear_reg_bits(hs->dev, RETU_REG_AUDTXR,
1177+ 1 << 3, 0);
1178+ } else {
1179+ retu_set_clear_reg_bits(hs->dev, RETU_REG_AUDTXR, 0,
1180+ (1 << 0) | (1 << 1) | (1 << 3));
1181+ }
1182+}
1183+
1184+static void retu_headset_enable(struct retu_headset *hs)
1185+{
1186+ mutex_lock(&hs->mutex);
1187+ if (!hs->bias_enabled) {
1188+ hs->bias_enabled = 1;
1189+ retu_headset_set_bias(hs, 1);
1190+ }
1191+ mutex_unlock(&hs->mutex);
1192+}
1193+
1194+static void retu_headset_disable(struct retu_headset *hs)
1195+{
1196+ mutex_lock(&hs->mutex);
1197+ if (hs->bias_enabled) {
1198+ hs->bias_enabled = 0;
1199+ retu_headset_set_bias(hs, 0);
1200+ }
1201+ mutex_unlock(&hs->mutex);
1202+}
1203+
1204+static void retu_headset_det_enable(struct retu_headset *hs)
1205+{
1206+ mutex_lock(&hs->mutex);
1207+ if (!hs->detection_enabled) {
1208+ hs->detection_enabled = 1;
1209+ retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1,
1210+ (1 << 10) | (1 << 8), 0);
1211+ }
1212+ mutex_unlock(&hs->mutex);
1213+}
1214+
1215+static void retu_headset_det_disable(struct retu_headset *hs)
1216+{
1217+ unsigned long flags;
1218+
1219+ mutex_lock(&hs->mutex);
1220+ if (hs->detection_enabled) {
1221+ hs->detection_enabled = 0;
1222+ del_timer_sync(&hs->enable_timer);
1223+ del_timer_sync(&hs->detect_timer);
1224+ spin_lock_irqsave(&hs->lock, flags);
1225+ if (hs->pressed)
1226+ input_report_key(hs->idev, RETU_HEADSET_KEY, 0);
1227+ spin_unlock_irqrestore(&hs->lock, flags);
1228+ retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1, 0,
1229+ (1 << 10) | (1 << 8));
1230+ }
1231+ mutex_unlock(&hs->mutex);
1232+}
1233+
1234+static ssize_t retu_headset_hookdet_show(struct device *dev,
1235+ struct device_attribute *attr,
1236+ char *buf)
1237+{
1238+ int val;
1239+
1240+ val = retu_read_adc(dev, RETU_ADC_CHANNEL_HOOKDET);
1241+ return sprintf(buf, "%d\n", val);
1242+}
1243+
1244+static DEVICE_ATTR(hookdet, S_IRUGO, retu_headset_hookdet_show, NULL);
1245+
1246+static ssize_t retu_headset_enable_show(struct device *dev,
1247+ struct device_attribute *attr,
1248+ char *buf)
1249+{
1250+ struct retu_headset *hs = dev_get_drvdata(dev);
1251+
1252+ return sprintf(buf, "%u\n", hs->bias_enabled);
1253+}
1254+
1255+static ssize_t retu_headset_enable_store(struct device *dev,
1256+ struct device_attribute *attr,
1257+ const char *buf, size_t count)
1258+{
1259+ struct retu_headset *hs = dev_get_drvdata(dev);
1260+ int enable;
1261+
1262+ if (sscanf(buf, "%u", &enable) != 1)
1263+ return -EINVAL;
1264+ if (enable)
1265+ retu_headset_enable(hs);
1266+ else
1267+ retu_headset_disable(hs);
1268+ return count;
1269+}
1270+
1271+static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR | S_IWGRP,
1272+ retu_headset_enable_show, retu_headset_enable_store);
1273+
1274+static ssize_t retu_headset_enable_det_show(struct device *dev,
1275+ struct device_attribute *attr,
1276+ char *buf)
1277+{
1278+ struct retu_headset *hs = dev_get_drvdata(dev);
1279+
1280+ return sprintf(buf, "%u\n", hs->detection_enabled);
1281+}
1282+
1283+static ssize_t retu_headset_enable_det_store(struct device *dev,
1284+ struct device_attribute *attr,
1285+ const char *buf, size_t count)
1286+{
1287+ struct retu_headset *hs = dev_get_drvdata(dev);
1288+ int enable;
1289+
1290+ if (sscanf(buf, "%u", &enable) != 1)
1291+ return -EINVAL;
1292+ if (enable)
1293+ retu_headset_det_enable(hs);
1294+ else
1295+ retu_headset_det_disable(hs);
1296+ return count;
1297+}
1298+
1299+static DEVICE_ATTR(enable_det, S_IRUGO | S_IWUSR | S_IWGRP,
1300+ retu_headset_enable_det_show,
1301+ retu_headset_enable_det_store);
1302+
1303+static irqreturn_t retu_headset_hook_interrupt(int irq, void *_hs)
1304+{
1305+ struct retu_headset *hs = _hs;
1306+ unsigned long flags;
1307+
1308+ spin_lock_irqsave(&hs->lock, flags);
1309+ if (!hs->pressed) {
1310+ /* Headset button was just pressed down. */
1311+ hs->pressed = 1;
1312+ input_report_key(hs->idev, RETU_HEADSET_KEY, 1);
1313+ }
1314+ spin_unlock_irqrestore(&hs->lock, flags);
1315+ retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1, 0,
1316+ (1 << 10) | (1 << 8));
1317+ mod_timer(&hs->enable_timer, jiffies + msecs_to_jiffies(50));
1318+
1319+ return IRQ_HANDLED;
1320+}
1321+
1322+static void retu_headset_enable_timer(unsigned long arg)
1323+{
1324+ struct retu_headset *hs = (struct retu_headset *) arg;
1325+
1326+ retu_set_clear_reg_bits(hs->dev, RETU_REG_CC1,
1327+ (1 << 10) | (1 << 8), 0);
1328+ mod_timer(&hs->detect_timer, jiffies + msecs_to_jiffies(350));
1329+}
1330+
1331+static void retu_headset_detect_timer(unsigned long arg)
1332+{
1333+ struct retu_headset *hs = (struct retu_headset *) arg;
1334+ unsigned long flags;
1335+
1336+ spin_lock_irqsave(&hs->lock, flags);
1337+ if (hs->pressed) {
1338+ hs->pressed = 0;
1339+ input_report_key(hs->idev, RETU_HEADSET_KEY, 0);
1340+ }
1341+ spin_unlock_irqrestore(&hs->lock, flags);
1342+}
1343+
1344+static int __init retu_headset_probe(struct platform_device *pdev)
1345+{
1346+ struct retu_headset *hs;
1347+ int irq;
1348+ int r;
1349+
1350+ hs = kzalloc(sizeof(*hs), GFP_KERNEL);
1351+ if (hs == NULL)
1352+ return -ENOMEM;
1353+
1354+ hs->dev = &pdev->dev;
1355+
1356+ hs->idev = input_allocate_device();
1357+ if (hs->idev == NULL) {
1358+ r = -ENOMEM;
1359+ goto err1;
1360+ }
1361+ hs->idev->name = "retu-headset";
1362+ hs->idev->dev.parent = &pdev->dev;
1363+ set_bit(EV_KEY, hs->idev->evbit);
1364+ set_bit(RETU_HEADSET_KEY, hs->idev->keybit);
1365+ r = input_register_device(hs->idev);
1366+ if (r < 0)
1367+ goto err2;
1368+
1369+ r = device_create_file(&pdev->dev, &dev_attr_hookdet);
1370+ if (r < 0)
1371+ goto err3;
1372+ r = device_create_file(&pdev->dev, &dev_attr_enable);
1373+ if (r < 0)
1374+ goto err4;
1375+ r = device_create_file(&pdev->dev, &dev_attr_enable_det);
1376+ if (r < 0)
1377+ goto err5;
1378+ platform_set_drvdata(pdev, hs);
1379+
1380+ spin_lock_init(&hs->lock);
1381+ mutex_init(&hs->mutex);
1382+ setup_timer(&hs->enable_timer, retu_headset_enable_timer,
1383+ (unsigned long) hs);
1384+ setup_timer(&hs->detect_timer, retu_headset_detect_timer,
1385+ (unsigned long) hs);
1386+
1387+ irq = platform_get_irq(pdev, 0);
1388+ hs->irq = irq;
1389+
1390+ r = request_threaded_irq(irq, NULL, retu_headset_hook_interrupt, 0,
1391+ "hookdet", hs);
1392+ if (r != 0) {
1393+ dev_err(&pdev->dev, "hookdet IRQ not available\n");
1394+ goto err6;
1395+ }
1396+
1397+ return 0;
1398+err6:
1399+ device_remove_file(&pdev->dev, &dev_attr_enable_det);
1400+err5:
1401+ device_remove_file(&pdev->dev, &dev_attr_enable);
1402+err4:
1403+ device_remove_file(&pdev->dev, &dev_attr_hookdet);
1404+err3:
1405+ input_unregister_device(hs->idev);
1406+err2:
1407+ input_free_device(hs->idev);
1408+err1:
1409+ kfree(hs);
1410+ return r;
1411+}
1412+
1413+static int retu_headset_remove(struct platform_device *pdev)
1414+{
1415+ struct retu_headset *hs = platform_get_drvdata(pdev);
1416+
1417+ device_remove_file(&pdev->dev, &dev_attr_hookdet);
1418+ device_remove_file(&pdev->dev, &dev_attr_enable);
1419+ device_remove_file(&pdev->dev, &dev_attr_enable_det);
1420+ retu_headset_disable(hs);
1421+ retu_headset_det_disable(hs);
1422+ free_irq(hs->irq, hs);
1423+ input_unregister_device(hs->idev);
1424+ input_free_device(hs->idev);
1425+
1426+ return 0;
1427+}
1428+
1429+static int retu_headset_suspend(struct platform_device *pdev,
1430+ pm_message_t mesg)
1431+{
1432+ struct retu_headset *hs = platform_get_drvdata(pdev);
1433+
1434+ mutex_lock(&hs->mutex);
1435+ if (hs->bias_enabled)
1436+ retu_headset_set_bias(hs, 0);
1437+ mutex_unlock(&hs->mutex);
1438+
1439+ return 0;
1440+}
1441+
1442+static int retu_headset_resume(struct platform_device *pdev)
1443+{
1444+ struct retu_headset *hs = platform_get_drvdata(pdev);
1445+
1446+ mutex_lock(&hs->mutex);
1447+ if (hs->bias_enabled)
1448+ retu_headset_set_bias(hs, 1);
1449+ mutex_unlock(&hs->mutex);
1450+
1451+ return 0;
1452+}
1453+
1454+static struct platform_driver retu_headset_driver = {
1455+ .remove = retu_headset_remove,
1456+ .suspend = retu_headset_suspend,
1457+ .resume = retu_headset_resume,
1458+ .driver = {
1459+ .name = "retu-headset",
1460+ },
1461+};
1462+
1463+static int __init retu_headset_init(void)
1464+{
1465+ return platform_driver_probe(&retu_headset_driver, retu_headset_probe);
1466+}
1467+
1468+static void __exit retu_headset_exit(void)
1469+{
1470+ platform_driver_unregister(&retu_headset_driver);
1471+}
1472+
1473+module_init(retu_headset_init);
1474+module_exit(retu_headset_exit);
1475+
1476+MODULE_DESCRIPTION("Retu/Vilma headset detection");
1477+MODULE_LICENSE("GPL");
1478+MODULE_AUTHOR("Juha Yrjölä");
1479--- /dev/null
1480+++ b/drivers/cbus/retu-pwrbutton.c
1481@@ -0,0 +1,165 @@
1482+/**
1483+ * drivers/cbus/retu-pwrbutton.c
1484+ *
1485+ * Driver for sending retu power button event to input-layer
1486+ *
1487+ * Copyright (C) 2004-2010 Nokia Corporation
1488+ *
1489+ * Written by
1490+ * Ari Saastamoinen <ari.saastamoinen@elektrobit.com>
1491+ * Juha Yrjola <juha.yrjola@solidboot.com>
1492+ *
1493+ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
1494+ *
1495+ * This file is subject to the terms and conditions of the GNU General
1496+ * Public License. See the file "COPYING" in the main directory of this
1497+ * archive for more details.
1498+ *
1499+ * This program is distributed in the hope that it will be useful,
1500+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
1501+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1502+ * GNU General Public License for more details.
1503+ *
1504+ * You should have received a copy of the GNU General Public License
1505+ * along with this program; if not, write to the Free Software
1506+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1507+ */
1508+
1509+#include <linux/module.h>
1510+#include <linux/init.h>
1511+#include <linux/kernel.h>
1512+#include <linux/errno.h>
1513+#include <linux/input.h>
1514+#include <linux/jiffies.h>
1515+#include <linux/bitops.h>
1516+#include <linux/irq.h>
1517+#include <linux/interrupt.h>
1518+#include <linux/platform_device.h>
1519+#include <linux/slab.h>
1520+
1521+#include "retu.h"
1522+
1523+#define RETU_STATUS_PWRONX (1 << 5)
1524+
1525+#define PWRBTN_DELAY 20
1526+#define PWRBTN_UP 0
1527+#define PWRBTN_PRESSED 1
1528+
1529+struct retu_pwrbutton {
1530+ struct input_dev *idev;
1531+ struct device *dev;
1532+
1533+ int state;
1534+ int irq;
1535+};
1536+
1537+static irqreturn_t retubutton_irq(int irq, void *_pwr)
1538+{
1539+ struct retu_pwrbutton *pwr = _pwr;
1540+ int state;
1541+
1542+ if (retu_read_reg(pwr->dev, RETU_REG_STATUS) & RETU_STATUS_PWRONX)
1543+ state = PWRBTN_UP;
1544+ else
1545+ state = PWRBTN_PRESSED;
1546+
1547+ if (pwr->state != state) {
1548+ input_report_key(pwr->idev, KEY_POWER, state);
1549+ input_sync(pwr->idev);
1550+ pwr->state = state;
1551+ }
1552+
1553+ return IRQ_HANDLED;
1554+}
1555+
1556+static int __init retubutton_probe(struct platform_device *pdev)
1557+{
1558+ struct retu_pwrbutton *pwr;
1559+ int ret = 0;
1560+
1561+ pwr = kzalloc(sizeof(*pwr), GFP_KERNEL);
1562+ if (!pwr) {
1563+ dev_err(&pdev->dev, "not enough memory\n");
1564+ ret = -ENOMEM;
1565+ goto err0;
1566+ }
1567+
1568+ pwr->dev = &pdev->dev;
1569+ pwr->irq = platform_get_irq(pdev, 0);
1570+ platform_set_drvdata(pdev, pwr);
1571+
1572+ ret = request_threaded_irq(pwr->irq, NULL, retubutton_irq, 0,
1573+ "retu-pwrbutton", pwr);
1574+ if (ret < 0) {
1575+ dev_err(&pdev->dev, "Cannot allocate irq\n");
1576+ goto err1;
1577+ }
1578+
1579+ pwr->idev = input_allocate_device();
1580+ if (!pwr->idev) {
1581+ dev_err(&pdev->dev, "can't allocate input device\n");
1582+ ret = -ENOMEM;
1583+ goto err2;
1584+ }
1585+
1586+ pwr->idev->evbit[0] = BIT_MASK(EV_KEY);
1587+ pwr->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
1588+ pwr->idev->name = "retu-pwrbutton";
1589+
1590+ ret = input_register_device(pwr->idev);
1591+ if (ret < 0) {
1592+ dev_err(&pdev->dev, "failed to register input device\n");
1593+ goto err3;
1594+ }
1595+
1596+ return 0;
1597+
1598+err3:
1599+ input_free_device(pwr->idev);
1600+
1601+err2:
1602+ free_irq(pwr->irq, pwr);
1603+
1604+err1:
1605+ kfree(pwr);
1606+
1607+err0:
1608+ return ret;
1609+}
1610+
1611+static int __exit retubutton_remove(struct platform_device *pdev)
1612+{
1613+ struct retu_pwrbutton *pwr = platform_get_drvdata(pdev);
1614+
1615+ free_irq(pwr->irq, pwr);
1616+ input_unregister_device(pwr->idev);
1617+ input_free_device(pwr->idev);
1618+ kfree(pwr);
1619+
1620+ return 0;
1621+}
1622+
1623+static struct platform_driver retu_pwrbutton_driver = {
1624+ .remove = __exit_p(retubutton_remove),
1625+ .driver = {
1626+ .name = "retu-pwrbutton",
1627+ },
1628+};
1629+
1630+static int __init retubutton_init(void)
1631+{
1632+ return platform_driver_probe(&retu_pwrbutton_driver, retubutton_probe);
1633+}
1634+module_init(retubutton_init);
1635+
1636+static void __exit retubutton_exit(void)
1637+{
1638+ platform_driver_unregister(&retu_pwrbutton_driver);
1639+}
1640+module_exit(retubutton_exit);
1641+
1642+MODULE_DESCRIPTION("Retu Power Button");
1643+MODULE_LICENSE("GPL");
1644+MODULE_AUTHOR("Ari Saastamoinen");
1645+MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
1646+
1647--- /dev/null
1648+++ b/drivers/cbus/retu-rtc.c
1649@@ -0,0 +1,287 @@
1650+/**
1651+ * drivers/cbus/retu-rtc.c
1652+ *
1653+ * Support for Retu RTC
1654+ *
1655+ * Copyright (C) 2004, 2005 Nokia Corporation
1656+ *
1657+ * Written by Paul Mundt <paul.mundt@nokia.com> and
1658+ * Igor Stoppa <igor.stoppa@nokia.com>
1659+ *
1660+ * The Retu RTC is essentially a partial read-only RTC that gives us Retu's
1661+ * idea of what time actually is. It's left as a userspace excercise to map
1662+ * this back to time in the real world and ensure that calibration settings
1663+ * are sane to compensate for any horrible drift (on account of not being able
1664+ * to set the clock to anything).
1665+ *
1666+ * Days are semi-writeable. Namely, Retu will only track 255 days for us
1667+ * consecutively, after which the counter is explicitly stuck at 255 until
1668+ * someone comes along and clears it with a write. In the event that no one
1669+ * comes along and clears it, we no longer have any idea what day it is.
1670+ *
1671+ * This file is subject to the terms and conditions of the GNU General
1672+ * Public License. See the file "COPYING" in the main directory of this
1673+ * archive for more details.
1674+ *
1675+ * This program is distributed in the hope that it will be useful,
1676+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
1677+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1678+ * GNU General Public License for more details.
1679+ *
1680+ * You should have received a copy of the GNU General Public License
1681+ * along with this program; if not, write to the Free Software
1682+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1683+ */
1684+
1685+#include <linux/device.h>
1686+#include <linux/init.h>
1687+#include <linux/kernel.h>
1688+#include <linux/slab.h>
1689+#include <linux/module.h>
1690+#include <linux/platform_device.h>
1691+#include <linux/mutex.h>
1692+#include <linux/rtc.h>
1693+
1694+#include "cbus.h"
1695+#include "retu.h"
1696+
1697+struct retu_rtc {
1698+ /* device lock */
1699+ struct mutex mutex;
1700+ struct device *dev;
1701+ struct rtc_device *rtc;
1702+
1703+ u16 alarm_expired;
1704+ int irq_rtcs;
1705+ int irq_rtca;
1706+};
1707+
1708+static void retu_rtc_do_reset(struct retu_rtc *rtc)
1709+{
1710+ u16 ccr1;
1711+
1712+ ccr1 = retu_read_reg(rtc->dev, RETU_REG_CC1);
1713+ /* RTC in reset */
1714+ retu_write_reg(rtc->dev, RETU_REG_CC1, ccr1 | 0x0001);
1715+ /* RTC in normal operating mode */
1716+ retu_write_reg(rtc->dev, RETU_REG_CC1, ccr1 & ~0x0001);
1717+
1718+ /* Disable alarm and RTC WD */
1719+ retu_write_reg(rtc->dev, RETU_REG_RTCHMAR, 0x7f3f);
1720+ /* Set Calibration register to default value */
1721+ retu_write_reg(rtc->dev, RETU_REG_RTCCALR, 0x00c0);
1722+
1723+ rtc->alarm_expired = 0;
1724+}
1725+
1726+static irqreturn_t retu_rtc_interrupt(int irq, void *_rtc)
1727+{
1728+ struct retu_rtc *rtc = _rtc;
1729+
1730+ mutex_lock(&rtc->mutex);
1731+ rtc->alarm_expired = 1;
1732+ retu_write_reg(rtc->dev, RETU_REG_RTCHMAR, (24 << 8) | 60);
1733+ mutex_unlock(&rtc->mutex);
1734+
1735+ return IRQ_HANDLED;
1736+}
1737+
1738+static int retu_rtc_init_irq(struct retu_rtc *rtc)
1739+{
1740+ int irq;
1741+ int ret;
1742+
1743+ irq = platform_get_irq(to_platform_device(rtc->dev), 0);
1744+ rtc->irq_rtcs = irq;
1745+
1746+ irq = platform_get_irq(to_platform_device(rtc->dev), 1);
1747+ rtc->irq_rtca = irq;
1748+
1749+ ret = request_threaded_irq(rtc->irq_rtcs, NULL, retu_rtc_interrupt,
1750+ 0, "RTCS", rtc);
1751+ if (ret != 0)
1752+ return ret;
1753+
1754+ ret = request_threaded_irq(rtc->irq_rtca, NULL, retu_rtc_interrupt,
1755+ 0, "RTCA", rtc);
1756+ if (ret != 0) {
1757+ free_irq(rtc->irq_rtcs, rtc);
1758+ return ret;
1759+ }
1760+
1761+ return 0;
1762+}
1763+
1764+static int retu_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
1765+{
1766+ struct retu_rtc *rtc = dev_get_drvdata(dev);
1767+ u16 chmar;
1768+
1769+ mutex_lock(&rtc->mutex);
1770+
1771+ chmar = ((alm->time.tm_hour & 0x1f) << 8) | (alm->time.tm_min & 0x3f);
1772+ retu_write_reg(rtc->dev, RETU_REG_RTCHMAR, chmar);
1773+
1774+ mutex_unlock(&rtc->mutex);
1775+
1776+ return 0;
1777+}
1778+
1779+static int retu_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
1780+{
1781+ struct retu_rtc *rtc = dev_get_drvdata(dev);
1782+ u16 chmar;
1783+
1784+ mutex_lock(&rtc->mutex);
1785+
1786+ chmar = retu_read_reg(rtc->dev, RETU_REG_RTCHMAR);
1787+
1788+ alm->time.tm_hour = (chmar >> 8) & 0x1f;
1789+ alm->time.tm_min = chmar & 0x3f;
1790+ alm->enabled = !!rtc->alarm_expired;
1791+
1792+ mutex_unlock(&rtc->mutex);
1793+
1794+ return 0;
1795+}
1796+
1797+static int retu_rtc_set_time(struct device *dev, struct rtc_time *tm)
1798+{
1799+ struct retu_rtc *rtc = dev_get_drvdata(dev);
1800+ u16 dsr;
1801+ u16 hmr;
1802+
1803+ dsr = ((tm->tm_mday & 0xff) << 8) | (tm->tm_hour & 0xff);
1804+ hmr = ((tm->tm_min & 0xff) << 8) | (tm->tm_sec & 0xff);
1805+
1806+ mutex_lock(&rtc->mutex);
1807+
1808+ retu_write_reg(rtc->dev, RETU_REG_RTCDSR, dsr);
1809+ retu_write_reg(rtc->dev, RETU_REG_RTCHMR, hmr);
1810+
1811+ mutex_unlock(&rtc->mutex);
1812+
1813+ return 0;
1814+}
1815+
1816+static int retu_rtc_read_time(struct device *dev, struct rtc_time *tm)
1817+{
1818+ struct retu_rtc *rtc = dev_get_drvdata(dev);
1819+ u16 dsr;
1820+ u16 hmr;
1821+
1822+ /*
1823+ * DSR holds days and hours
1824+ * HMR hols minutes and seconds
1825+ *
1826+ * both are 16 bit registers with 8-bit for each field.
1827+ */
1828+
1829+ mutex_lock(&rtc->mutex);
1830+
1831+ dsr = retu_read_reg(rtc->dev, RETU_REG_RTCDSR);
1832+ hmr = retu_read_reg(rtc->dev, RETU_REG_RTCHMR);
1833+
1834+ tm->tm_sec = hmr & 0xff;
1835+ tm->tm_min = hmr >> 8;
1836+ tm->tm_hour = dsr & 0xff;
1837+ tm->tm_mday = dsr >> 8;
1838+
1839+ mutex_unlock(&rtc->mutex);
1840+
1841+ return 0;
1842+}
1843+
1844+static struct rtc_class_ops retu_rtc_ops = {
1845+ .read_time = retu_rtc_read_time,
1846+ .set_time = retu_rtc_set_time,
1847+ .read_alarm = retu_rtc_read_alarm,
1848+ .set_alarm = retu_rtc_set_alarm,
1849+};
1850+
1851+static int __init retu_rtc_probe(struct platform_device *pdev)
1852+{
1853+ struct retu_rtc *rtc;
1854+ int r;
1855+
1856+ rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
1857+ if (!rtc) {
1858+ dev_err(&pdev->dev, "not enough memory\n");
1859+ r = -ENOMEM;
1860+ goto err0;
1861+ }
1862+
1863+ rtc->dev = &pdev->dev;
1864+ platform_set_drvdata(pdev, rtc);
1865+ mutex_init(&rtc->mutex);
1866+
1867+ rtc->alarm_expired = retu_read_reg(rtc->dev, RETU_REG_IDR) &
1868+ (0x1 << RETU_INT_RTCA);
1869+
1870+ r = retu_rtc_init_irq(rtc);
1871+ if (r < 0) {
1872+ dev_err(&pdev->dev, "failed to request retu irq\n");
1873+ goto err1;
1874+ }
1875+
1876+ /* If the calibration register is zero, we've probably lost power */
1877+ if (!(retu_read_reg(rtc->dev, RETU_REG_RTCCALR) & 0x00ff))
1878+ retu_rtc_do_reset(rtc);
1879+
1880+ rtc->rtc = rtc_device_register(pdev->name, &pdev->dev, &
1881+ retu_rtc_ops, THIS_MODULE);
1882+ if (IS_ERR(rtc->rtc)) {
1883+ dev_err(&pdev->dev, "can't register RTC device\n");
1884+ goto err2;
1885+ }
1886+
1887+ return 0;
1888+
1889+err2:
1890+ free_irq(rtc->irq_rtcs, rtc);
1891+ free_irq(rtc->irq_rtca, rtc);
1892+
1893+err1:
1894+ kfree(rtc);
1895+
1896+err0:
1897+ return r;
1898+}
1899+
1900+static int __devexit retu_rtc_remove(struct platform_device *pdev)
1901+{
1902+ struct retu_rtc *rtc = platform_get_drvdata(pdev);
1903+
1904+ free_irq(rtc->irq_rtcs, rtc);
1905+ free_irq(rtc->irq_rtca, rtc);
1906+ rtc_device_unregister(rtc->rtc);
1907+ kfree(rtc);
1908+
1909+ return 0;
1910+}
1911+
1912+static struct platform_driver retu_rtc_driver = {
1913+ .remove = __exit_p(retu_rtc_remove),
1914+ .driver = {
1915+ .name = "retu-rtc",
1916+ },
1917+};
1918+
1919+static int __init retu_rtc_init(void)
1920+{
1921+ return platform_driver_probe(&retu_rtc_driver, retu_rtc_probe);
1922+}
1923+module_init(retu_rtc_init);
1924+
1925+static void __exit retu_rtc_exit(void)
1926+{
1927+ platform_driver_unregister(&retu_rtc_driver);
1928+}
1929+module_exit(retu_rtc_exit);
1930+
1931+MODULE_DESCRIPTION("Retu RTC");
1932+MODULE_LICENSE("GPL");
1933+MODULE_AUTHOR("Paul Mundt");
1934+MODULE_AUTHOR("Igor Stoppa");
1935+MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
1936+
1937--- /dev/null
1938+++ b/drivers/cbus/retu-wdt.c
1939@@ -0,0 +1,272 @@
1940+/**
1941+ * drivers/cbus/retu-wdt.c
1942+ *
1943+ * Driver for Retu watchdog
1944+ *
1945+ * Copyright (C) 2004, 2005 Nokia Corporation
1946+ *
1947+ * Written by Amit Kucheria <amit.kucheria@nokia.com>
1948+ *
1949+ * Cleanups by Michael Buesch <mb@bu3sch.de> (C) 2011
1950+ *
1951+ * This file is subject to the terms and conditions of the GNU General
1952+ * Public License. See the file "COPYING" in the main directory of this
1953+ * archive for more details.
1954+ *
1955+ * This program is distributed in the hope that it will be useful,
1956+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
1957+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1958+ * GNU General Public License for more details.
1959+ *
1960+ * You should have received a copy of the GNU General Public License
1961+ * along with this program; if not, write to the Free Software
1962+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1963+ */
1964+
1965+#include <linux/kernel.h>
1966+#include <linux/slab.h>
1967+#include <linux/module.h>
1968+#include <linux/device.h>
1969+#include <linux/init.h>
1970+#include <linux/fs.h>
1971+#include <linux/io.h>
1972+#include <linux/platform_device.h>
1973+
1974+#include <linux/completion.h>
1975+#include <linux/errno.h>
1976+#include <linux/moduleparam.h>
1977+#include <linux/miscdevice.h>
1978+#include <linux/watchdog.h>
1979+
1980+#include <asm/uaccess.h>
1981+
1982+#include <plat/prcm.h>
1983+
1984+#include "cbus.h"
1985+#include "retu.h"
1986+
1987+/* Watchdog timeout in seconds */
1988+#define RETU_WDT_MIN_TIMER 0
1989+#define RETU_WDT_DEFAULT_TIMER 32
1990+#define RETU_WDT_MAX_TIMER 63
1991+
1992+struct retu_wdt_dev {
1993+ struct device *dev;
1994+ unsigned int period_val; /* Current period of watchdog */
1995+ unsigned long users;
1996+ struct miscdevice miscdev;
1997+ struct delayed_work ping_work;
1998+ struct mutex mutex;
1999+};
2000+
2001+
2002+static inline void _retu_modify_counter(struct retu_wdt_dev *wdev,
2003+ unsigned int new)
2004+{
2005+ retu_write_reg(wdev->dev, RETU_REG_WATCHDOG, (u16)new);
2006+}
2007+
2008+static int retu_modify_counter(struct retu_wdt_dev *wdev, unsigned int new)
2009+{
2010+ if (new < RETU_WDT_MIN_TIMER || new > RETU_WDT_MAX_TIMER)
2011+ return -EINVAL;
2012+
2013+ mutex_lock(&wdev->mutex);
2014+ wdev->period_val = new;
2015+ _retu_modify_counter(wdev, wdev->period_val);
2016+ mutex_unlock(&wdev->mutex);
2017+
2018+ return 0;
2019+}
2020+
2021+/*
2022+ * Since retu watchdog cannot be disabled in hardware, we must kick it
2023+ * with a timer until userspace watchdog software takes over. Do this
2024+ * unless /dev/watchdog is open or CONFIG_WATCHDOG_NOWAYOUT is set.
2025+ */
2026+static void retu_wdt_ping_enable(struct retu_wdt_dev *wdev)
2027+{
2028+ _retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
2029+ schedule_delayed_work(&wdev->ping_work,
2030+ round_jiffies_relative(RETU_WDT_DEFAULT_TIMER * HZ));
2031+}
2032+
2033+static void retu_wdt_ping_disable(struct retu_wdt_dev *wdev)
2034+{
2035+ _retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
2036+ cancel_delayed_work_sync(&wdev->ping_work);
2037+}
2038+
2039+static void retu_wdt_ping_work(struct work_struct *work)
2040+{
2041+ struct retu_wdt_dev *wdev = container_of(to_delayed_work(work),
2042+ struct retu_wdt_dev, ping_work);
2043+ retu_wdt_ping_enable(wdev);
2044+}
2045+
2046+static int retu_wdt_open(struct inode *inode, struct file *file)
2047+{
2048+ struct miscdevice *mdev = file->private_data;
2049+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
2050+
2051+ if (test_and_set_bit(0, &wdev->users))
2052+ return -EBUSY;
2053+
2054+ retu_wdt_ping_disable(wdev);
2055+
2056+ return nonseekable_open(inode, file);
2057+}
2058+
2059+static int retu_wdt_release(struct inode *inode, struct file *file)
2060+{
2061+ struct miscdevice *mdev = file->private_data;
2062+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
2063+
2064+#ifndef CONFIG_WATCHDOG_NOWAYOUT
2065+ retu_wdt_ping_enable(wdev);
2066+#endif
2067+ clear_bit(0, &wdev->users);
2068+
2069+ return 0;
2070+}
2071+
2072+static ssize_t retu_wdt_write(struct file *file, const char __user *data,
2073+ size_t len, loff_t *ppos)
2074+{
2075+ struct miscdevice *mdev = file->private_data;
2076+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
2077+
2078+ if (len)
2079+ retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
2080+
2081+ return len;
2082+}
2083+
2084+static long retu_wdt_ioctl(struct file *file, unsigned int cmd,
2085+ unsigned long arg)
2086+{
2087+ struct miscdevice *mdev = file->private_data;
2088+ struct retu_wdt_dev *wdev = container_of(mdev, struct retu_wdt_dev, miscdev);
2089+ int new_margin;
2090+
2091+ static const struct watchdog_info ident = {
2092+ .identity = "Retu Watchdog",
2093+ .options = WDIOF_SETTIMEOUT,
2094+ .firmware_version = 0,
2095+ };
2096+
2097+ switch (cmd) {
2098+ default:
2099+ return -ENOTTY;
2100+ case WDIOC_GETSUPPORT:
2101+ return copy_to_user((struct watchdog_info __user *)arg, &ident,
2102+ sizeof(ident));
2103+ case WDIOC_GETSTATUS:
2104+ return put_user(0, (int __user *)arg);
2105+ case WDIOC_GETBOOTSTATUS:
2106+ if (cpu_is_omap16xx())
2107+ return put_user(omap_readw(ARM_SYSST),
2108+ (int __user *)arg);
2109+ if (cpu_is_omap24xx())
2110+ return put_user(omap_prcm_get_reset_sources(),
2111+ (int __user *)arg);
2112+ case WDIOC_KEEPALIVE:
2113+ retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
2114+ break;
2115+ case WDIOC_SETTIMEOUT:
2116+ if (get_user(new_margin, (int __user *)arg))
2117+ return -EFAULT;
2118+ retu_modify_counter(wdev, new_margin);
2119+ /* Fall through */
2120+ case WDIOC_GETTIMEOUT:
2121+ return put_user(wdev->period_val, (int __user *)arg);
2122+ }
2123+
2124+ return 0;
2125+}
2126+
2127+static const struct file_operations retu_wdt_fops = {
2128+ .owner = THIS_MODULE,
2129+ .write = retu_wdt_write,
2130+ .unlocked_ioctl = retu_wdt_ioctl,
2131+ .open = retu_wdt_open,
2132+ .release = retu_wdt_release,
2133+};
2134+
2135+static int __init retu_wdt_probe(struct platform_device *pdev)
2136+{
2137+ struct retu_wdt_dev *wdev;
2138+ int ret;
2139+
2140+ wdev = kzalloc(sizeof(struct retu_wdt_dev), GFP_KERNEL);
2141+ if (!wdev)
2142+ return -ENOMEM;
2143+
2144+ wdev->dev = &pdev->dev;
2145+ wdev->period_val = RETU_WDT_DEFAULT_TIMER;
2146+ mutex_init(&wdev->mutex);
2147+
2148+ platform_set_drvdata(pdev, wdev);
2149+
2150+ wdev->miscdev.parent = &pdev->dev;
2151+ wdev->miscdev.minor = WATCHDOG_MINOR;
2152+ wdev->miscdev.name = "watchdog";
2153+ wdev->miscdev.fops = &retu_wdt_fops;
2154+
2155+ ret = misc_register(&wdev->miscdev);
2156+ if (ret)
2157+ goto err_free_wdev;
2158+
2159+ INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work);
2160+
2161+ /* Kick the watchdog for kernel booting to finish.
2162+ * If nowayout is not set, we start the ping work. */
2163+#ifdef CONFIG_WATCHDOG_NOWAYOUT
2164+ retu_modify_counter(wdev, RETU_WDT_MAX_TIMER);
2165+#else
2166+ retu_wdt_ping_enable(wdev);
2167+#endif
2168+
2169+ return 0;
2170+
2171+err_free_wdev:
2172+ kfree(wdev);
2173+
2174+ return ret;
2175+}
2176+
2177+static int __devexit retu_wdt_remove(struct platform_device *pdev)
2178+{
2179+ struct retu_wdt_dev *wdev;
2180+
2181+ wdev = platform_get_drvdata(pdev);
2182+ misc_deregister(&wdev->miscdev);
2183+ cancel_delayed_work_sync(&wdev->ping_work);
2184+ kfree(wdev);
2185+
2186+ return 0;
2187+}
2188+
2189+static struct platform_driver retu_wdt_driver = {
2190+ .remove = __exit_p(retu_wdt_remove),
2191+ .driver = {
2192+ .name = "retu-wdt",
2193+ },
2194+};
2195+
2196+static int __init retu_wdt_init(void)
2197+{
2198+ return platform_driver_probe(&retu_wdt_driver, retu_wdt_probe);
2199+}
2200+
2201+static void __exit retu_wdt_exit(void)
2202+{
2203+ platform_driver_unregister(&retu_wdt_driver);
2204+}
2205+
2206+module_init(retu_wdt_init);
2207+module_exit(retu_wdt_exit);
2208+
2209+MODULE_DESCRIPTION("Retu WatchDog");
2210+MODULE_AUTHOR("Amit Kucheria");
2211+MODULE_LICENSE("GPL");
2212--- /dev/null
2213+++ b/drivers/cbus/tahvo.c
2214@@ -0,0 +1,423 @@
2215+/**
2216+ * drivers/cbus/tahvo.c
2217+ *
2218+ * Support functions for Tahvo ASIC
2219+ *
2220+ * Copyright (C) 2004, 2005 Nokia Corporation
2221+ *
2222+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>,
2223+ * David Weinehall <david.weinehall@nokia.com>, and
2224+ * Mikko Ylinen <mikko.k.ylinen@nokia.com>
2225+ *
2226+ * This file is subject to the terms and conditions of the GNU General
2227+ * Public License. See the file "COPYING" in the main directory of this
2228+ * archive for more details.
2229+ *
2230+ * This program is distributed in the hope that it will be useful,
2231+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
2232+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2233+ * GNU General Public License for more details.
2234+ *
2235+ * You should have received a copy of the GNU General Public License
2236+ * along with this program; if not, write to the Free Software
2237+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
2238+ */
2239+
2240+#include <linux/module.h>
2241+#include <linux/init.h>
2242+
2243+#include <linux/slab.h>
2244+#include <linux/kernel.h>
2245+#include <linux/errno.h>
2246+#include <linux/device.h>
2247+#include <linux/irq.h>
2248+#include <linux/interrupt.h>
2249+#include <linux/platform_device.h>
2250+#include <linux/platform_data/cbus.h>
2251+#include <linux/mutex.h>
2252+
2253+#include "cbus.h"
2254+#include "tahvo.h"
2255+
2256+struct tahvo {
2257+ /* device lock */
2258+ struct mutex mutex;
2259+ struct device *dev;
2260+
2261+ int irq_base;
2262+ int irq_end;
2263+ int irq;
2264+
2265+ int ack;
2266+ int mask;
2267+
2268+ unsigned int mask_pending:1;
2269+ unsigned int ack_pending:1;
2270+ unsigned int is_betty:1;
2271+};
2272+
2273+/**
2274+ * __tahvo_read_reg - Reads a value from a register in Tahvo
2275+ * @tahvo: pointer to tahvo structure
2276+ * @reg: the register address to read from
2277+ */
2278+static int __tahvo_read_reg(struct tahvo *tahvo, unsigned reg)
2279+{
2280+ return cbus_read_reg(tahvo->dev, CBUS_TAHVO_DEVICE_ID, reg);
2281+}
2282+
2283+/**
2284+ * __tahvo_write_reg - Writes a value to a register in Tahvo
2285+ * @tahvo: pointer to tahvo structure
2286+ * @reg: register address to write to
2287+ * @val: the value to be written to @reg
2288+ */
2289+static void __tahvo_write_reg(struct tahvo *tahvo, unsigned reg, u16 val)
2290+{
2291+ cbus_write_reg(tahvo->dev, CBUS_TAHVO_DEVICE_ID, reg, val);
2292+}
2293+
2294+/**
2295+ * tahvo_read_reg - Read a value from a register in Tahvo
2296+ * @child: device pointer from the calling child
2297+ * @reg: the register to read from
2298+ *
2299+ * This function returns the contents of the specified register
2300+ */
2301+int tahvo_read_reg(struct device *child, unsigned reg)
2302+{
2303+ struct tahvo *tahvo = dev_get_drvdata(child->parent);
2304+
2305+ return __tahvo_read_reg(tahvo, reg);
2306+}
2307+EXPORT_SYMBOL(tahvo_read_reg);
2308+
2309+/**
2310+ * tahvo_write_reg - Write a value to a register in Tahvo
2311+ * @child: device pointer from the calling child
2312+ * @reg: the register to write to
2313+ * @val : the value to write to the register
2314+ *
2315+ * This function writes a value to the specified register
2316+ */
2317+void tahvo_write_reg(struct device *child, unsigned reg, u16 val)
2318+{
2319+ struct tahvo *tahvo = dev_get_drvdata(child->parent);
2320+
2321+ __tahvo_write_reg(tahvo, reg, val);
2322+}
2323+EXPORT_SYMBOL(tahvo_write_reg);
2324+
2325+/**
2326+ * tahvo_set_clear_reg_bits - set and clear register bits atomically
2327+ * @child: device pointer from the calling child
2328+ * @reg: the register to write to
2329+ * @bits: the bits to set
2330+ *
2331+ * This function sets and clears the specified Tahvo register bits atomically
2332+ */
2333+void tahvo_set_clear_reg_bits(struct device *child, unsigned reg, u16 set,
2334+ u16 clear)
2335+{
2336+ struct tahvo *tahvo = dev_get_drvdata(child->parent);
2337+ u16 w;
2338+
2339+ mutex_lock(&tahvo->mutex);
2340+ w = __tahvo_read_reg(tahvo, reg);
2341+ w &= ~clear;
2342+ w |= set;
2343+ __tahvo_write_reg(tahvo, reg, w);
2344+ mutex_unlock(&tahvo->mutex);
2345+}
2346+
2347+static irqreturn_t tahvo_irq_handler(int irq, void *_tahvo)
2348+{
2349+ struct tahvo *tahvo = _tahvo;
2350+ u16 id;
2351+ u16 im;
2352+
2353+ id = __tahvo_read_reg(tahvo, TAHVO_REG_IDR);
2354+ im = __tahvo_read_reg(tahvo, TAHVO_REG_IMR);
2355+ id &= ~im;
2356+
2357+ if (!id) {
2358+ dev_vdbg(tahvo->dev, "No IRQ, spurious ?\n");
2359+ return IRQ_NONE;
2360+ }
2361+
2362+ while (id) {
2363+ unsigned long pending = __ffs(id);
2364+ unsigned int irq;
2365+
2366+ id &= ~BIT(pending);
2367+ irq = pending + tahvo->irq_base;
2368+ handle_nested_irq(irq);
2369+ }
2370+
2371+ return IRQ_HANDLED;
2372+}
2373+
2374+/* -------------------------------------------------------------------------- */
2375+
2376+static void tahvo_irq_bus_lock(struct irq_data *data)
2377+{
2378+ struct tahvo *tahvo = irq_data_get_irq_chip_data(data);
2379+
2380+ mutex_lock(&tahvo->mutex);
2381+}
2382+
2383+static void tahvo_irq_bus_sync_unlock(struct irq_data *data)
2384+{
2385+ struct tahvo *tahvo = irq_data_get_irq_chip_data(data);
2386+
2387+ if (tahvo->mask_pending) {
2388+ __tahvo_write_reg(tahvo, TAHVO_REG_IMR, tahvo->mask);
2389+ tahvo->mask_pending = false;
2390+ }
2391+
2392+ if (tahvo->ack_pending) {
2393+ __tahvo_write_reg(tahvo, TAHVO_REG_IDR, tahvo->ack);
2394+ tahvo->ack_pending = false;
2395+ }
2396+
2397+ mutex_unlock(&tahvo->mutex);
2398+}
2399+
2400+static void tahvo_irq_mask(struct irq_data *data)
2401+{
2402+ struct tahvo *tahvo = irq_data_get_irq_chip_data(data);
2403+ int irq = data->irq;
2404+
2405+ tahvo->mask |= (1 << (irq - tahvo->irq_base));
2406+ tahvo->mask_pending = true;
2407+}
2408+
2409+static void tahvo_irq_unmask(struct irq_data *data)
2410+{
2411+ struct tahvo *tahvo = irq_data_get_irq_chip_data(data);
2412+ int irq = data->irq;
2413+
2414+ tahvo->mask &= ~(1 << (irq - tahvo->irq_base));
2415+ tahvo->mask_pending = true;
2416+}
2417+
2418+static void tahvo_irq_ack(struct irq_data *data)
2419+{
2420+ struct tahvo *tahvo = irq_data_get_irq_chip_data(data);
2421+ int irq = data->irq;
2422+
2423+ tahvo->ack |= (1 << (irq - tahvo->irq_base));
2424+ tahvo->ack_pending = true;
2425+}
2426+
2427+static struct irq_chip tahvo_irq_chip = {
2428+ .name = "tahvo",
2429+ .irq_bus_lock = tahvo_irq_bus_lock,
2430+ .irq_bus_sync_unlock = tahvo_irq_bus_sync_unlock,
2431+ .irq_mask = tahvo_irq_mask,
2432+ .irq_unmask = tahvo_irq_unmask,
2433+ .irq_ack = tahvo_irq_ack,
2434+};
2435+
2436+static inline void tahvo_irq_setup(int irq)
2437+{
2438+#ifdef CONFIG_ARM
2439+ set_irq_flags(irq, IRQF_VALID);
2440+#else
2441+ irq_set_noprobe(irq);
2442+#endif
2443+}
2444+
2445+static void tahvo_irq_init(struct tahvo *tahvo)
2446+{
2447+ int base = tahvo->irq_base;
2448+ int end = tahvo->irq_end;
2449+ int irq;
2450+
2451+ for (irq = base; irq < end; irq++) {
2452+ irq_set_chip_data(irq, tahvo);
2453+ irq_set_chip_and_handler(irq, &tahvo_irq_chip,
2454+ handle_simple_irq);
2455+ irq_set_nested_thread(irq, 1);
2456+ tahvo_irq_setup(irq);
2457+ }
2458+}
2459+
2460+/* -------------------------------------------------------------------------- */
2461+
2462+static struct resource generic_resources[] = {
2463+ {
2464+ .start = -EINVAL, /* fixed later */
2465+ .flags = IORESOURCE_IRQ,
2466+ },
2467+};
2468+
2469+static struct device *tahvo_allocate_child(const char *name,
2470+ struct device *parent, int irq)
2471+{
2472+ struct platform_device *pdev;
2473+ int ret;
2474+
2475+ pdev = platform_device_alloc(name, -1);
2476+ if (!pdev) {
2477+ dev_dbg(parent, "can't allocate %s\n", name);
2478+ goto err0;
2479+ }
2480+
2481+ pdev->dev.parent = parent;
2482+
2483+ if (irq > 0) {
2484+ generic_resources[0].start = irq;
2485+
2486+ ret = platform_device_add_resources(pdev, generic_resources,
2487+ ARRAY_SIZE(generic_resources));
2488+ if (ret < 0) {
2489+ dev_dbg(parent, "can't add resources to %s\n", name);
2490+ goto err1;
2491+ }
2492+ }
2493+
2494+ ret = platform_device_add(pdev);
2495+ if (ret < 0) {
2496+ dev_dbg(parent, "can't add %s\n", name);
2497+ goto err1;
2498+ }
2499+
2500+ return &pdev->dev;
2501+
2502+err1:
2503+ platform_device_put(pdev);
2504+
2505+err0:
2506+ return NULL;
2507+}
2508+
2509+static int tahvo_allocate_children(struct device *parent, int irq_base)
2510+{
2511+ struct device *child;
2512+
2513+ child = tahvo_allocate_child("tahvo-usb", parent,
2514+ irq_base + TAHVO_INT_VBUSON);
2515+ if (!child)
2516+ return -ENOMEM;
2517+
2518+ child = tahvo_allocate_child("tahvo-pwm", parent, -1);
2519+ if (!child)
2520+ return -ENOMEM;
2521+
2522+ return 0;
2523+}
2524+
2525+static int __devinit tahvo_probe(struct platform_device *pdev)
2526+{
2527+ struct tahvo *tahvo;
2528+ int rev;
2529+ int ret;
2530+ int irq;
2531+ int id;
2532+
2533+ tahvo = kzalloc(sizeof(*tahvo), GFP_KERNEL);
2534+ if (!tahvo) {
2535+ dev_err(&pdev->dev, "not enough memory\n");
2536+ ret = -ENOMEM;
2537+ goto err0;
2538+ }
2539+
2540+ irq = platform_get_irq(pdev, 0);
2541+ platform_set_drvdata(pdev, tahvo);
2542+
2543+ mutex_init(&tahvo->mutex);
2544+
2545+ ret = irq_alloc_descs(-1, 0, MAX_TAHVO_IRQ_HANDLERS, 0);
2546+ if (ret < 0) {
2547+ dev_err(&pdev->dev, "failed to allocate IRQ descs\n");
2548+ goto err1;
2549+ }
2550+
2551+ tahvo->irq_base = ret;
2552+ tahvo->irq_end = ret + MAX_TAHVO_IRQ_HANDLERS;
2553+ tahvo->dev = &pdev->dev;
2554+ tahvo->irq = irq;
2555+
2556+ tahvo_irq_init(tahvo);
2557+
2558+ rev = __tahvo_read_reg(tahvo, TAHVO_REG_ASICR);
2559+
2560+ id = (rev >> 8) & 0xff;
2561+
2562+ if (id == 0x0b)
2563+ tahvo->is_betty = true;
2564+
2565+ ret = tahvo_allocate_children(&pdev->dev, tahvo->irq_base);
2566+ if (ret < 0) {
2567+ dev_err(&pdev->dev, "failed to allocate children\n");
2568+ goto err2;
2569+ }
2570+
2571+ dev_err(&pdev->dev, "%s v%d.%d found\n",
2572+ tahvo->is_betty ? "Betty" : "Tahvo",
2573+ (rev >> 4) & 0x0f, rev & 0x0f);
2574+
2575+ /* Mask all TAHVO interrupts */
2576+ __tahvo_write_reg(tahvo, TAHVO_REG_IMR, 0xffff);
2577+
2578+ ret = request_threaded_irq(irq, NULL, tahvo_irq_handler,
2579+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
2580+ "tahvo", tahvo);
2581+ if (ret < 0) {
2582+ dev_err(&pdev->dev, "Unable to register IRQ handler\n");
2583+ goto err2;
2584+ }
2585+
2586+ return 0;
2587+
2588+err2:
2589+ irq_free_descs(tahvo->irq_base, MAX_TAHVO_IRQ_HANDLERS);
2590+
2591+err1:
2592+ kfree(tahvo);
2593+
2594+err0:
2595+ return ret;
2596+}
2597+
2598+static int __devexit tahvo_remove(struct platform_device *pdev)
2599+{
2600+ struct tahvo *tahvo = platform_get_drvdata(pdev);
2601+ int irq;
2602+
2603+ irq = platform_get_irq(pdev, 0);
2604+
2605+ free_irq(irq, 0);
2606+ irq_free_descs(tahvo->irq_base, MAX_TAHVO_IRQ_HANDLERS);
2607+ kfree(tahvo);
2608+
2609+ return 0;
2610+}
2611+
2612+static struct platform_driver tahvo_driver = {
2613+ .probe = tahvo_probe,
2614+ .remove = __devexit_p(tahvo_remove),
2615+ .driver = {
2616+ .name = "tahvo",
2617+ },
2618+};
2619+
2620+static int __init tahvo_init(void)
2621+{
2622+ return platform_driver_register(&tahvo_driver);
2623+}
2624+subsys_initcall(tahvo_init);
2625+
2626+static void __exit tahvo_exit(void)
2627+{
2628+ platform_driver_unregister(&tahvo_driver);
2629+}
2630+module_exit(tahvo_exit);
2631+
2632+MODULE_DESCRIPTION("Tahvo ASIC control");
2633+MODULE_LICENSE("GPL");
2634+MODULE_AUTHOR("Juha Yrjölä");
2635+MODULE_AUTHOR("David Weinehall");
2636+MODULE_AUTHOR("Mikko Ylinen");
2637+
2638--- /dev/null
2639+++ b/drivers/cbus/tahvo.h
2640@@ -0,0 +1,58 @@
2641+/*
2642+ * drivers/cbus/tahvo.h
2643+ *
2644+ * Copyright (C) 2004, 2005 Nokia Corporation
2645+ *
2646+ * Written by Juha Yrjölä <juha.yrjola@nokia.com> and
2647+ * David Weinehall <david.weinehall@nokia.com>
2648+ *
2649+ * This file is subject to the terms and conditions of the GNU General
2650+ * Public License. See the file "COPYING" in the main directory of this
2651+ * archive for more details.
2652+ *
2653+ * This program is distributed in the hope that it will be useful,
2654+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
2655+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2656+ * GNU General Public License for more details.
2657+
2658+ * You should have received a copy of the GNU General Public License
2659+ * along with this program; if not, write to the Free Software
2660+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
2661+ */
2662+
2663+#ifndef __DRIVERS_CBUS_TAHVO_H
2664+#define __DRIVERS_CBUS_TAHVO_H
2665+
2666+#include <linux/types.h>
2667+
2668+/* Registers */
2669+#define TAHVO_REG_ASICR 0x00 /* ASIC ID & revision */
2670+#define TAHVO_REG_IDR 0x01 /* Interrupt ID */
2671+#define TAHVO_REG_IDSR 0x02 /* Interrupt status */
2672+#define TAHVO_REG_IMR 0x03 /* Interrupt mask */
2673+#define TAHVO_REG_CHGCURR 0x04 /* Charge current control PWM (8-bit) */
2674+#define TAHVO_REG_LEDPWMR 0x05 /* LED PWM */
2675+#define TAHVO_REG_USBR 0x06 /* USB control */
2676+#define TAHVO_REG_CHGCTL 0x08 /* Charge control register */
2677+#define TAHVO_REG_CHGCTL_EN 0x0001 /* Global charge enable */
2678+#define TAHVO_REG_CHGCTL_PWMOVR 0x0004 /* PWM override. Force charge PWM to 0%/100% duty cycle. */
2679+#define TAHVO_REG_CHGCTL_PWMOVRZERO 0x0008 /* If set, PWM override is 0% (If unset -> 100%) */
2680+#define TAHVO_REG_CHGCTL_CURMEAS 0x0040 /* Enable battery current measurement. */
2681+#define TAHVO_REG_CHGCTL_CURTIMRST 0x0080 /* Current measure timer reset. */
2682+#define TAHVO_REG_BATCURRTIMER 0x0c /* Battery current measure timer (8-bit) */
2683+#define TAHVO_REG_BATCURR 0x0d /* Battery (dis)charge current (signed 16-bit) */
2684+
2685+#define TAHVO_REG_MAX 0x0d
2686+
2687+/* Interrupt sources */
2688+#define TAHVO_INT_VBUSON 0
2689+#define TAHVO_INT_BATCURR 7 /* Battery current measure timer */
2690+
2691+#define MAX_TAHVO_IRQ_HANDLERS 8
2692+
2693+int tahvo_read_reg(struct device *child, unsigned reg);
2694+void tahvo_write_reg(struct device *child, unsigned reg, u16 val);
2695+void tahvo_set_clear_reg_bits(struct device *child, unsigned reg, u16 set,
2696+ u16 clear);
2697+
2698+#endif /* __DRIVERS_CBUS_TAHVO_H */
2699--- /dev/null
2700+++ b/drivers/cbus/tahvo-usb.c
2701@@ -0,0 +1,740 @@
2702+/**
2703+ * drivers/cbus/tahvo-usb.c
2704+ *
2705+ * Tahvo USB transeiver
2706+ *
2707+ * Copyright (C) 2005-2006 Nokia Corporation
2708+ *
2709+ * Parts copied from drivers/i2c/chips/isp1301_omap.c
2710+ * Copyright (C) 2004 Texas Instruments
2711+ * Copyright (C) 2004 David Brownell
2712+ *
2713+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>,
2714+ * Tony Lindgren <tony@atomide.com>, and
2715+ * Timo Teräs <timo.teras@nokia.com>
2716+ *
2717+ * This file is subject to the terms and conditions of the GNU General
2718+ * Public License. See the file "COPYING" in the main directory of this
2719+ * archive for more details.
2720+ *
2721+ * This program is distributed in the hope that it will be useful,
2722+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
2723+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2724+ * GNU General Public License for more details.
2725+ *
2726+ * You should have received a copy of the GNU General Public License
2727+ * along with this program; if not, write to the Free Software
2728+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
2729+ */
2730+
2731+#include <linux/kernel.h>
2732+#include <linux/module.h>
2733+#include <linux/init.h>
2734+#include <linux/slab.h>
2735+#include <linux/io.h>
2736+#include <linux/interrupt.h>
2737+#include <linux/platform_device.h>
2738+#include <linux/usb/ch9.h>
2739+#include <linux/usb/gadget.h>
2740+#include <linux/usb.h>
2741+#include <linux/usb/otg.h>
2742+#include <linux/i2c.h>
2743+#include <linux/workqueue.h>
2744+#include <linux/kobject.h>
2745+#include <linux/clk.h>
2746+#include <linux/mutex.h>
2747+
2748+#include <asm/irq.h>
2749+#include <plat/usb.h>
2750+
2751+#include "cbus.h"
2752+#include "tahvo.h"
2753+
2754+#define DRIVER_NAME "tahvo-usb"
2755+
2756+#define USBR_SLAVE_CONTROL (1 << 8)
2757+#define USBR_VPPVIO_SW (1 << 7)
2758+#define USBR_SPEED (1 << 6)
2759+#define USBR_REGOUT (1 << 5)
2760+#define USBR_MASTER_SW2 (1 << 4)
2761+#define USBR_MASTER_SW1 (1 << 3)
2762+#define USBR_SLAVE_SW (1 << 2)
2763+#define USBR_NSUSPEND (1 << 1)
2764+#define USBR_SEMODE (1 << 0)
2765+
2766+/* bits in OTG_CTRL */
2767+
2768+/* Bits that are controlled by OMAP OTG and are read-only */
2769+#define OTG_CTRL_OMAP_MASK (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|\
2770+ OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
2771+/* Bits that are controlled by transceiver */
2772+#define OTG_CTRL_XCVR_MASK (OTG_ASESSVLD|OTG_BSESSEND|\
2773+ OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
2774+/* Bits that are controlled by system */
2775+#define OTG_CTRL_SYS_MASK (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|\
2776+ OTG_B_HNPEN|OTG_BUSDROP)
2777+
2778+#if defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OTG)
2779+#error tahvo-otg.c does not work with OCHI yet!
2780+#endif
2781+
2782+#define TAHVO_MODE_HOST 0
2783+#define TAHVO_MODE_PERIPHERAL 1
2784+
2785+#ifdef CONFIG_USB_OTG
2786+#define TAHVO_MODE(tu) (tu)->tahvo_mode
2787+#elif defined(CONFIG_USB_GADGET_OMAP)
2788+#define TAHVO_MODE(tu) TAHVO_MODE_PERIPHERAL
2789+#else
2790+#define TAHVO_MODE(tu) TAHVO_MODE_HOST
2791+#endif
2792+
2793+struct tahvo_usb {
2794+ struct device *dev;
2795+ struct platform_device *pt_dev;
2796+ struct otg_transceiver otg;
2797+ int vbus_state;
2798+ struct mutex serialize;
2799+#ifdef CONFIG_USB_OTG
2800+ int tahvo_mode;
2801+#endif
2802+ struct clk *ick;
2803+
2804+ int irq;
2805+};
2806+static struct tahvo_usb *tahvo_usb_device;
2807+
2808+/*
2809+ * ---------------------------------------------------------------------------
2810+ * OTG related functions
2811+ *
2812+ * These shoud be separated into omap-otg.c driver module, as they are used
2813+ * by various transceivers. These functions are needed in the UDC-only case
2814+ * as well. These functions are copied from GPL isp1301_omap.c
2815+ * ---------------------------------------------------------------------------
2816+ */
2817+static struct platform_device *tahvo_otg_dev;
2818+
2819+static irqreturn_t omap_otg_irq(int irq, void *arg)
2820+{
2821+ u16 otg_irq;
2822+
2823+ otg_irq = omap_readw(OTG_IRQ_SRC);
2824+ if (otg_irq & OPRT_CHG) {
2825+ omap_writew(OPRT_CHG, OTG_IRQ_SRC);
2826+ } else if (otg_irq & B_SRP_TMROUT) {
2827+ omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
2828+ } else if (otg_irq & B_HNP_FAIL) {
2829+ omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
2830+ } else if (otg_irq & A_SRP_DETECT) {
2831+ omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
2832+ } else if (otg_irq & A_REQ_TMROUT) {
2833+ omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
2834+ } else if (otg_irq & A_VBUS_ERR) {
2835+ omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
2836+ } else if (otg_irq & DRIVER_SWITCH) {
2837+#ifdef CONFIG_USB_OTG
2838+ if ((!(omap_readl(OTG_CTRL) & OTG_DRIVER_SEL)) &&
2839+ tu->otg.host && tu->otg.state == OTG_STATE_A_HOST) {
2840+ /* role is host */
2841+ usb_bus_start_enum(tu->otg.host,
2842+ tu->otg.host->otg_port);
2843+ }
2844+#endif
2845+ omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
2846+ } else
2847+ return IRQ_NONE;
2848+
2849+ return IRQ_HANDLED;
2850+
2851+}
2852+
2853+static int tahvo_otg_init(void)
2854+{
2855+ u32 l;
2856+
2857+#ifdef CONFIG_USB_OTG
2858+ if (!tahvo_otg_dev) {
2859+ printk("tahvo-usb: no tahvo_otg_dev\n");
2860+ return -ENODEV;
2861+ }
2862+#endif
2863+
2864+ l = omap_readl(OTG_SYSCON_1);
2865+ l &= ~OTG_IDLE_EN;
2866+ omap_writel(l, OTG_SYSCON_1);
2867+ udelay(100);
2868+
2869+ /* some of these values are board-specific... */
2870+ l = omap_readl(OTG_SYSCON_2);
2871+ l |= OTG_EN
2872+ /* for B-device: */
2873+ | SRP_GPDATA /* 9msec Bdev D+ pulse */
2874+ | SRP_GPDVBUS /* discharge after VBUS pulse */
2875+ // | (3 << 24) /* 2msec VBUS pulse */
2876+ /* for A-device: */
2877+ | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
2878+ | SRP_DPW /* detect 167+ns SRP pulses */
2879+ | SRP_DATA | SRP_VBUS; /* accept both kinds of SRP pulse */
2880+ omap_writel(l, OTG_SYSCON_2);
2881+
2882+ omap_writew(DRIVER_SWITCH | OPRT_CHG
2883+ | B_SRP_TMROUT | B_HNP_FAIL
2884+ | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT,
2885+ OTG_IRQ_EN);
2886+ l = omap_readl(OTG_SYSCON_2);
2887+ l |= OTG_EN;
2888+ omap_writel(l, OTG_SYSCON_2);
2889+
2890+ return 0;
2891+}
2892+
2893+static int __init omap_otg_probe(struct platform_device *pdev)
2894+{
2895+ int ret;
2896+
2897+ tahvo_otg_dev = pdev;
2898+ ret = tahvo_otg_init();
2899+ if (ret != 0) {
2900+ printk(KERN_ERR "tahvo-usb: tahvo_otg_init failed\n");
2901+ return ret;
2902+ }
2903+
2904+ return request_irq(tahvo_otg_dev->resource[1].start,
2905+ omap_otg_irq, IRQF_DISABLED, DRIVER_NAME,
2906+ tahvo_usb_device);
2907+}
2908+
2909+static int __exit omap_otg_remove(struct platform_device *pdev)
2910+{
2911+ free_irq(tahvo_otg_dev->resource[1].start, tahvo_usb_device);
2912+ tahvo_otg_dev = NULL;
2913+
2914+ return 0;
2915+}
2916+
2917+struct platform_driver omap_otg_driver = {
2918+ .driver = {
2919+ .name = "omap_otg",
2920+ },
2921+ .remove = __exit_p(omap_otg_remove),
2922+};
2923+
2924+/*
2925+ * ---------------------------------------------------------------------------
2926+ * Tahvo related functions
2927+ * These are Nokia proprietary code, except for the OTG register settings,
2928+ * which are copied from isp1301.c
2929+ * ---------------------------------------------------------------------------
2930+ */
2931+static ssize_t vbus_state_show(struct device *device,
2932+ struct device_attribute *attr, char *buf)
2933+{
2934+ struct tahvo_usb *tu = dev_get_drvdata(device);
2935+ return sprintf(buf, "%d\n", tu->vbus_state);
2936+}
2937+static DEVICE_ATTR(vbus_state, 0444, vbus_state_show, NULL);
2938+
2939+int vbus_active = 0;
2940+
2941+static void check_vbus_state(struct tahvo_usb *tu)
2942+{
2943+ int reg, prev_state;
2944+
2945+ reg = tahvo_read_reg(tu->dev, TAHVO_REG_IDSR);
2946+ if (reg & 0x01) {
2947+ u32 l;
2948+
2949+ vbus_active = 1;
2950+ switch (tu->otg.state) {
2951+ case OTG_STATE_B_IDLE:
2952+ /* Enable the gadget driver */
2953+ if (tu->otg.gadget)
2954+ usb_gadget_vbus_connect(tu->otg.gadget);
2955+ /* Set B-session valid and not B-sessio ended to indicate
2956+ * Vbus to be ok. */
2957+ l = omap_readl(OTG_CTRL);
2958+ l &= ~OTG_BSESSEND;
2959+ l |= OTG_BSESSVLD;
2960+ omap_writel(l, OTG_CTRL);
2961+
2962+ tu->otg.state = OTG_STATE_B_PERIPHERAL;
2963+ break;
2964+ case OTG_STATE_A_IDLE:
2965+ /* Session is now valid assuming the USB hub is driving Vbus */
2966+ tu->otg.state = OTG_STATE_A_HOST;
2967+ break;
2968+ default:
2969+ break;
2970+ }
2971+ printk("USB cable connected\n");
2972+ } else {
2973+ switch (tu->otg.state) {
2974+ case OTG_STATE_B_PERIPHERAL:
2975+ if (tu->otg.gadget)
2976+ usb_gadget_vbus_disconnect(tu->otg.gadget);
2977+ tu->otg.state = OTG_STATE_B_IDLE;
2978+ break;
2979+ case OTG_STATE_A_HOST:
2980+ tu->otg.state = OTG_STATE_A_IDLE;
2981+ break;
2982+ default:
2983+ break;
2984+ }
2985+ printk("USB cable disconnected\n");
2986+ vbus_active = 0;
2987+ }
2988+
2989+ prev_state = tu->vbus_state;
2990+ tu->vbus_state = reg & 0x01;
2991+ if (prev_state != tu->vbus_state)
2992+ sysfs_notify(&tu->pt_dev->dev.kobj, NULL, "vbus_state");
2993+}
2994+
2995+static void tahvo_usb_become_host(struct tahvo_usb *tu)
2996+{
2997+ u32 l;
2998+
2999+ /* Clear system and transceiver controlled bits
3000+ * also mark the A-session is always valid */
3001+ tahvo_otg_init();
3002+
3003+ l = omap_readl(OTG_CTRL);
3004+ l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK);
3005+ l |= OTG_ASESSVLD;
3006+ omap_writel(l, OTG_CTRL);
3007+
3008+ /* Power up the transceiver in USB host mode */
3009+ tahvo_write_reg(tu->dev, TAHVO_REG_USBR, USBR_REGOUT | USBR_NSUSPEND |
3010+ USBR_MASTER_SW2 | USBR_MASTER_SW1);
3011+ tu->otg.state = OTG_STATE_A_IDLE;
3012+
3013+ check_vbus_state(tu);
3014+}
3015+
3016+static void tahvo_usb_stop_host(struct tahvo_usb *tu)
3017+{
3018+ tu->otg.state = OTG_STATE_A_IDLE;
3019+}
3020+
3021+static void tahvo_usb_become_peripheral(struct tahvo_usb *tu)
3022+{
3023+ u32 l;
3024+
3025+ /* Clear system and transceiver controlled bits
3026+ * and enable ID to mark peripheral mode and
3027+ * BSESSEND to mark no Vbus */
3028+ tahvo_otg_init();
3029+ l = omap_readl(OTG_CTRL);
3030+ l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK | OTG_BSESSVLD);
3031+ l |= OTG_ID | OTG_BSESSEND;
3032+ omap_writel(l, OTG_CTRL);
3033+
3034+ /* Power up transceiver and set it in USB perhiperal mode */
3035+ tahvo_write_reg(tu->dev, TAHVO_REG_USBR, USBR_SLAVE_CONTROL | USBR_REGOUT | USBR_NSUSPEND | USBR_SLAVE_SW);
3036+ tu->otg.state = OTG_STATE_B_IDLE;
3037+
3038+ check_vbus_state(tu);
3039+}
3040+
3041+static void tahvo_usb_stop_peripheral(struct tahvo_usb *tu)
3042+{
3043+ u32 l;
3044+
3045+ l = omap_readl(OTG_CTRL);
3046+ l &= ~OTG_BSESSVLD;
3047+ l |= OTG_BSESSEND;
3048+ omap_writel(l, OTG_CTRL);
3049+
3050+ if (tu->otg.gadget)
3051+ usb_gadget_vbus_disconnect(tu->otg.gadget);
3052+ tu->otg.state = OTG_STATE_B_IDLE;
3053+
3054+}
3055+
3056+static void tahvo_usb_power_off(struct tahvo_usb *tu)
3057+{
3058+ u32 l;
3059+ int id;
3060+
3061+ /* Disable gadget controller if any */
3062+ if (tu->otg.gadget)
3063+ usb_gadget_vbus_disconnect(tu->otg.gadget);
3064+
3065+ /* Disable OTG and interrupts */
3066+ if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL)
3067+ id = OTG_ID;
3068+ else
3069+ id = 0;
3070+ l = omap_readl(OTG_CTRL);
3071+ l &= ~(OTG_CTRL_XCVR_MASK | OTG_CTRL_SYS_MASK | OTG_BSESSVLD);
3072+ l |= id | OTG_BSESSEND;
3073+ omap_writel(l, OTG_CTRL);
3074+ omap_writew(0, OTG_IRQ_EN);
3075+
3076+ l = omap_readl(OTG_SYSCON_2);
3077+ l &= ~OTG_EN;
3078+ omap_writel(l, OTG_SYSCON_2);
3079+
3080+ l = omap_readl(OTG_SYSCON_1);
3081+ l |= OTG_IDLE_EN;
3082+ omap_writel(l, OTG_SYSCON_1);
3083+
3084+ /* Power off transceiver */
3085+ tahvo_write_reg(tu->dev, TAHVO_REG_USBR, 0);
3086+ tu->otg.state = OTG_STATE_UNDEFINED;
3087+}
3088+
3089+
3090+static int tahvo_usb_set_power(struct otg_transceiver *dev, unsigned mA)
3091+{
3092+ struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg);
3093+
3094+ dev_dbg(&tu->pt_dev->dev, "set_power %d mA\n", mA);
3095+
3096+ if (dev->state == OTG_STATE_B_PERIPHERAL) {
3097+ /* REVISIT: Can Tahvo charge battery from VBUS? */
3098+ }
3099+ return 0;
3100+}
3101+
3102+static int tahvo_usb_set_suspend(struct otg_transceiver *dev, int suspend)
3103+{
3104+ struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg);
3105+ u16 w;
3106+
3107+ dev_dbg(&tu->pt_dev->dev, "set_suspend\n");
3108+
3109+ w = tahvo_read_reg(tu->dev, TAHVO_REG_USBR);
3110+ if (suspend)
3111+ w &= ~USBR_NSUSPEND;
3112+ else
3113+ w |= USBR_NSUSPEND;
3114+ tahvo_write_reg(tu->dev, TAHVO_REG_USBR, w);
3115+
3116+ return 0;
3117+}
3118+
3119+static int tahvo_usb_start_srp(struct otg_transceiver *dev)
3120+{
3121+ struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, otg);
3122+ u32 otg_ctrl;
3123+
3124+ dev_dbg(&tu->pt_dev->dev, "start_srp\n");
3125+
3126+ if (!dev || tu->otg.state != OTG_STATE_B_IDLE)
3127+ return -ENODEV;
3128+
3129+ otg_ctrl = omap_readl(OTG_CTRL);
3130+ if (!(otg_ctrl & OTG_BSESSEND))
3131+ return -EINVAL;
3132+
3133+ otg_ctrl |= OTG_B_BUSREQ;
3134+ otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_SYS_MASK;
3135+ omap_writel(otg_ctrl, OTG_CTRL);
3136+ tu->otg.state = OTG_STATE_B_SRP_INIT;
3137+
3138+ return 0;
3139+}
3140+
3141+static int tahvo_usb_start_hnp(struct otg_transceiver *otg)
3142+{
3143+ struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg);
3144+
3145+ dev_dbg(&tu->pt_dev->dev, "start_hnp\n");
3146+#ifdef CONFIG_USB_OTG
3147+ /* REVISIT: Add this for OTG */
3148+#endif
3149+ return -EINVAL;
3150+}
3151+
3152+static int tahvo_usb_set_host(struct otg_transceiver *otg, struct usb_bus *host)
3153+{
3154+ struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg);
3155+ u32 l;
3156+
3157+ dev_dbg(&tu->pt_dev->dev, "set_host %p\n", host);
3158+
3159+ if (otg == NULL)
3160+ return -ENODEV;
3161+
3162+#if defined(CONFIG_USB_OTG) || !defined(CONFIG_USB_GADGET_OMAP)
3163+
3164+ mutex_lock(&tu->serialize);
3165+
3166+ if (host == NULL) {
3167+ if (TAHVO_MODE(tu) == TAHVO_MODE_HOST)
3168+ tahvo_usb_power_off(tu);
3169+ tu->otg.host = NULL;
3170+ mutex_unlock(&tu->serialize);
3171+ return 0;
3172+ }
3173+
3174+ l = omap_readl(OTG_SYSCON_1);
3175+ l &= ~(OTG_IDLE_EN | HST_IDLE_EN | DEV_IDLE_EN);
3176+ omap_writel(l, OTG_SYSCON_1);
3177+
3178+ if (TAHVO_MODE(tu) == TAHVO_MODE_HOST) {
3179+ tu->otg.host = NULL;
3180+ tahvo_usb_become_host(tu);
3181+ }
3182+
3183+ tu->otg.host = host;
3184+
3185+ mutex_unlock(&tu->serialize);
3186+#else
3187+ /* No host mode configured, so do not allow host controlled to be set */
3188+ return -EINVAL;
3189+#endif
3190+
3191+ return 0;
3192+}
3193+
3194+static int tahvo_usb_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
3195+{
3196+ struct tahvo_usb *tu = container_of(otg, struct tahvo_usb, otg);
3197+
3198+ dev_dbg(&tu->pt_dev->dev, "set_peripheral %p\n", gadget);
3199+
3200+ if (!otg)
3201+ return -ENODEV;
3202+
3203+#if defined(CONFIG_USB_OTG) || defined(CONFIG_USB_GADGET_OMAP)
3204+
3205+ mutex_lock(&tu->serialize);
3206+
3207+ if (!gadget) {
3208+ if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL)
3209+ tahvo_usb_power_off(tu);
3210+ tu->otg.gadget = NULL;
3211+ mutex_unlock(&tu->serialize);
3212+ return 0;
3213+ }
3214+
3215+ tu->otg.gadget = gadget;
3216+ if (TAHVO_MODE(tu) == TAHVO_MODE_PERIPHERAL)
3217+ tahvo_usb_become_peripheral(tu);
3218+
3219+ mutex_unlock(&tu->serialize);
3220+#else
3221+ /* No gadget mode configured, so do not allow host controlled to be set */
3222+ return -EINVAL;
3223+#endif
3224+
3225+ return 0;
3226+}
3227+
3228+static irqreturn_t tahvo_usb_vbus_interrupt(int irq, void *_tu)
3229+{
3230+ struct tahvo_usb *tu = _tu;
3231+
3232+ check_vbus_state(tu);
3233+
3234+ return IRQ_HANDLED;
3235+}
3236+
3237+#ifdef CONFIG_USB_OTG
3238+static ssize_t otg_mode_show(struct device *device,
3239+ struct device_attribute *attr, char *buf)
3240+{
3241+ struct tahvo_usb *tu = dev_get_drvdata(device);
3242+ switch (tu->tahvo_mode) {
3243+ case TAHVO_MODE_HOST:
3244+ return sprintf(buf, "host\n");
3245+ case TAHVO_MODE_PERIPHERAL:
3246+ return sprintf(buf, "peripheral\n");
3247+ }
3248+ return sprintf(buf, "unknown\n");
3249+}
3250+
3251+static ssize_t otg_mode_store(struct device *device,
3252+ struct device_attribute *attr,
3253+ const char *buf, size_t count)
3254+{
3255+ struct tahvo_usb *tu = dev_get_drvdata(device);
3256+ int r;
3257+
3258+ r = strlen(buf);
3259+ mutex_lock(&tu->serialize);
3260+ if (strncmp(buf, "host", 4) == 0) {
3261+ if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL)
3262+ tahvo_usb_stop_peripheral(tu);
3263+ tu->tahvo_mode = TAHVO_MODE_HOST;
3264+ if (tu->otg.host) {
3265+ printk(KERN_INFO "Selected HOST mode: host controller present.\n");
3266+ tahvo_usb_become_host(tu);
3267+ } else {
3268+ printk(KERN_INFO "Selected HOST mode: no host controller, powering off.\n");
3269+ tahvo_usb_power_off(tu);
3270+ }
3271+ } else if (strncmp(buf, "peripheral", 10) == 0) {
3272+ if (tu->tahvo_mode == TAHVO_MODE_HOST)
3273+ tahvo_usb_stop_host(tu);
3274+ tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
3275+ if (tu->otg.gadget) {
3276+ printk(KERN_INFO "Selected PERIPHERAL mode: gadget driver present.\n");
3277+ tahvo_usb_become_peripheral(tu);
3278+ } else {
3279+ printk(KERN_INFO "Selected PERIPHERAL mode: no gadget driver, powering off.\n");
3280+ tahvo_usb_power_off(tu);
3281+ }
3282+ } else
3283+ r = -EINVAL;
3284+
3285+ mutex_unlock(&tu->serialize);
3286+ return r;
3287+}
3288+
3289+static DEVICE_ATTR(otg_mode, 0644, otg_mode_show, otg_mode_store);
3290+#endif
3291+
3292+static int __init tahvo_usb_probe(struct platform_device *pdev)
3293+{
3294+ struct tahvo_usb *tu;
3295+ struct device *dev = &pdev->dev;
3296+ int ret;
3297+ int irq;
3298+
3299+ dev_dbg(dev, "probe\n");
3300+
3301+ /* Create driver data */
3302+ tu = kzalloc(sizeof(*tu), GFP_KERNEL);
3303+ if (!tu)
3304+ return -ENOMEM;
3305+ tahvo_usb_device = tu;
3306+
3307+ tu->dev = dev;
3308+ tu->pt_dev = pdev;
3309+#ifdef CONFIG_USB_OTG
3310+ /* Default mode */
3311+#ifdef CONFIG_CBUS_TAHVO_USB_HOST_BY_DEFAULT
3312+ tu->tahvo_mode = TAHVO_MODE_HOST;
3313+#else
3314+ tu->tahvo_mode = TAHVO_MODE_PERIPHERAL;
3315+#endif
3316+#endif
3317+
3318+ mutex_init(&tu->serialize);
3319+
3320+ tu->ick = clk_get(NULL, "usb_l4_ick");
3321+ if (IS_ERR(tu->ick)) {
3322+ dev_err(dev, "Failed to get usb_l4_ick\n");
3323+ ret = PTR_ERR(tu->ick);
3324+ goto err_free_tu;
3325+ }
3326+ clk_enable(tu->ick);
3327+
3328+ /* Set initial state, so that we generate kevents only on
3329+ * state changes */
3330+ tu->vbus_state = tahvo_read_reg(tu->dev, TAHVO_REG_IDSR) & 0x01;
3331+
3332+ irq = platform_get_irq(pdev, 0);
3333+ tu->irq = irq;
3334+
3335+ /* We cannot enable interrupt until omap_udc is initialized */
3336+ ret = request_threaded_irq(irq, NULL, tahvo_usb_vbus_interrupt,
3337+ IRQF_ONESHOT, "tahvo-vbus", tu);
3338+ if (ret != 0) {
3339+ printk(KERN_ERR "Could not register Tahvo interrupt for VBUS\n");
3340+ goto err_release_clk;
3341+ }
3342+
3343+ /* Attributes */
3344+ ret = device_create_file(dev, &dev_attr_vbus_state);
3345+#ifdef CONFIG_USB_OTG
3346+ ret |= device_create_file(dev, &dev_attr_otg_mode);
3347+#endif
3348+ if (ret)
3349+ printk(KERN_ERR "attribute creation failed: %d\n", ret);
3350+
3351+ /* Create OTG interface */
3352+ tahvo_usb_power_off(tu);
3353+ tu->otg.state = OTG_STATE_UNDEFINED;
3354+ tu->otg.label = DRIVER_NAME;
3355+ tu->otg.set_host = tahvo_usb_set_host;
3356+ tu->otg.set_peripheral = tahvo_usb_set_peripheral;
3357+ tu->otg.set_power = tahvo_usb_set_power;
3358+ tu->otg.set_suspend = tahvo_usb_set_suspend;
3359+ tu->otg.start_srp = tahvo_usb_start_srp;
3360+ tu->otg.start_hnp = tahvo_usb_start_hnp;
3361+
3362+ ret = otg_set_transceiver(&tu->otg);
3363+ if (ret < 0) {
3364+ printk(KERN_ERR "Cannot register USB transceiver\n");
3365+ goto err_free_irq;
3366+ }
3367+
3368+ dev_set_drvdata(dev, tu);
3369+
3370+ return 0;
3371+
3372+err_free_irq:
3373+ free_irq(tu->irq, tu);
3374+err_release_clk:
3375+ clk_disable(tu->ick);
3376+ clk_put(tu->ick);
3377+err_free_tu:
3378+ kfree(tu);
3379+ tahvo_usb_device = NULL;
3380+
3381+ return ret;
3382+}
3383+
3384+static int __exit tahvo_usb_remove(struct platform_device *pdev)
3385+{
3386+ struct tahvo_usb *tu = platform_get_drvdata(pdev);
3387+
3388+ dev_dbg(&pdev->dev, "remove\n");
3389+
3390+ free_irq(tu->irq, tu);
3391+ flush_scheduled_work();
3392+ otg_set_transceiver(0);
3393+ device_remove_file(&pdev->dev, &dev_attr_vbus_state);
3394+#ifdef CONFIG_USB_OTG
3395+ device_remove_file(&pdev->dev, &dev_attr_otg_mode);
3396+#endif
3397+ clk_disable(tu->ick);
3398+ clk_put(tu->ick);
3399+
3400+ kfree(tu);
3401+ tahvo_usb_device = NULL;
3402+
3403+ return 0;
3404+}
3405+
3406+static struct platform_driver tahvo_usb_driver = {
3407+ .driver = {
3408+ .name = "tahvo-usb",
3409+ },
3410+ .remove = __exit_p(tahvo_usb_remove),
3411+};
3412+
3413+static int __init tahvo_usb_init(void)
3414+{
3415+ int ret = 0;
3416+
3417+ ret = platform_driver_probe(&tahvo_usb_driver, tahvo_usb_probe);
3418+ if (ret)
3419+ return ret;
3420+
3421+ ret = platform_driver_probe(&omap_otg_driver, omap_otg_probe);
3422+ if (ret) {
3423+ platform_driver_unregister(&tahvo_usb_driver);
3424+ return ret;
3425+ }
3426+
3427+ return 0;
3428+}
3429+
3430+subsys_initcall(tahvo_usb_init);
3431+
3432+static void __exit tahvo_usb_exit(void)
3433+{
3434+ platform_driver_unregister(&omap_otg_driver);
3435+ platform_driver_unregister(&tahvo_usb_driver);
3436+}
3437+module_exit(tahvo_usb_exit);
3438+
3439+MODULE_DESCRIPTION("Tahvo USB OTG Transceiver Driver");
3440+MODULE_LICENSE("GPL");
3441+MODULE_AUTHOR("Juha Yrjölä, Tony Lindgren, and Timo Teräs");
3442--- a/drivers/Makefile
3443+++ b/drivers/Makefile
3444@@ -78,7 +78,7 @@ obj-$(CONFIG_GAMEPORT) += input/gamepor
3445 obj-$(CONFIG_INPUT) += input/
3446 obj-$(CONFIG_I2O) += message/
3447 obj-$(CONFIG_RTC_LIB) += rtc/
3448-obj-y += i2c/ media/
3449+obj-y += i2c/ media/ cbus/
3450 obj-$(CONFIG_PPS) += pps/
3451 obj-$(CONFIG_PTP_1588_CLOCK) += ptp/
3452 obj-$(CONFIG_W1) += w1/
3453--- a/drivers/Kconfig
3454+++ b/drivers/Kconfig
3455@@ -2,6 +2,8 @@ menu "Device Drivers"
3456 
3457 source "drivers/base/Kconfig"
3458 
3459+source "drivers/cbus/Kconfig"
3460+
3461 source "drivers/connector/Kconfig"
3462 
3463 source "drivers/mtd/Kconfig"
3464

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