mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-29 19:21:31 -04:00
mfd: Near complete mc13783 rewrite
This fixes several things while still providing the old API: - simplify and fix locking - better error handling - don't ack all irqs making it impossible to detect a reset of the rtc - use a timeout variant to wait for completion of ADC conversion - provide platform-data to regulator subdevice (This allows making struct mc13783 opaque for other drivers after the regulator driver is updated to use its platform_data.) - expose all interrupts - use threaded irq After all users in mainline are converted to the new API, some things (e.g. mc13783-private.h) can go away. Signed-off-by: Uwe Kleine-König <[email protected]> Cc: Sascha Hauer <[email protected]> Cc: Mark Brown <[email protected]> Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Uwe Kleine-König
Samuel Ortiz
parent
d7f81c4416
commit
9e2726776d
3 changed files with 617 additions and 466 deletions
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@ -1,286 +1,549 @@
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/*
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* Copyright 2009 Pengutronix
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* Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
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*
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* loosely based on an earlier driver that has
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* Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
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*
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* This code is in parts based on wm8350-core.c and pcf50633-core.c
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*
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* Initial development of this code was funded by
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* Phytec Messtechnik GmbH, http://www.phytec.de
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License version 2 as published by the
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* Free Software Foundation.
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*/
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#include <linux/mfd/mc13783-private.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/mc13783.h>
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#include <linux/completion.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/spi/spi.h>
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#include <linux/uaccess.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/spi/spi.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/mc13783-private.h>
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#define MC13783_MAX_REG_NUM 0x3f
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#define MC13783_FRAME_MASK 0x00ffffff
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#define MC13783_MAX_REG_NUM 0x3f
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#define MC13783_REG_NUM_SHIFT 0x19
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#define MC13783_WRITE_BIT_SHIFT 31
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#define MC13783_IRQSTAT0 0
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#define MC13783_IRQSTAT0_ADCDONEI (1 << 0)
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#define MC13783_IRQSTAT0_ADCBISDONEI (1 << 1)
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#define MC13783_IRQSTAT0_TSI (1 << 2)
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#define MC13783_IRQSTAT0_WHIGHI (1 << 3)
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#define MC13783_IRQSTAT0_WLOWI (1 << 4)
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#define MC13783_IRQSTAT0_CHGDETI (1 << 6)
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#define MC13783_IRQSTAT0_CHGOVI (1 << 7)
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#define MC13783_IRQSTAT0_CHGREVI (1 << 8)
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#define MC13783_IRQSTAT0_CHGSHORTI (1 << 9)
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#define MC13783_IRQSTAT0_CCCVI (1 << 10)
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#define MC13783_IRQSTAT0_CHGCURRI (1 << 11)
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#define MC13783_IRQSTAT0_BPONI (1 << 12)
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#define MC13783_IRQSTAT0_LOBATLI (1 << 13)
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#define MC13783_IRQSTAT0_LOBATHI (1 << 14)
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#define MC13783_IRQSTAT0_UDPI (1 << 15)
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#define MC13783_IRQSTAT0_USBI (1 << 16)
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#define MC13783_IRQSTAT0_IDI (1 << 19)
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#define MC13783_IRQSTAT0_SE1I (1 << 21)
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#define MC13783_IRQSTAT0_CKDETI (1 << 22)
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#define MC13783_IRQSTAT0_UDMI (1 << 23)
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static inline int spi_rw(struct spi_device *spi, u8 * buf, size_t len)
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#define MC13783_IRQMASK0 1
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#define MC13783_IRQMASK0_ADCDONEM MC13783_IRQSTAT0_ADCDONEI
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#define MC13783_IRQMASK0_ADCBISDONEM MC13783_IRQSTAT0_ADCBISDONEI
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#define MC13783_IRQMASK0_TSM MC13783_IRQSTAT0_TSI
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#define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI
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#define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI
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#define MC13783_IRQMASK0_CHGDETM MC13783_IRQSTAT0_CHGDETI
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#define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI
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#define MC13783_IRQMASK0_CHGREVM MC13783_IRQSTAT0_CHGREVI
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#define MC13783_IRQMASK0_CHGSHORTM MC13783_IRQSTAT0_CHGSHORTI
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#define MC13783_IRQMASK0_CCCVM MC13783_IRQSTAT0_CCCVI
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#define MC13783_IRQMASK0_CHGCURRM MC13783_IRQSTAT0_CHGCURRI
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#define MC13783_IRQMASK0_BPONM MC13783_IRQSTAT0_BPONI
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#define MC13783_IRQMASK0_LOBATLM MC13783_IRQSTAT0_LOBATLI
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#define MC13783_IRQMASK0_LOBATHM MC13783_IRQSTAT0_LOBATHI
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#define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI
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#define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI
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#define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI
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#define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I
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#define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI
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#define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI
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#define MC13783_IRQSTAT1 3
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#define MC13783_IRQSTAT1_1HZI (1 << 0)
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#define MC13783_IRQSTAT1_TODAI (1 << 1)
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#define MC13783_IRQSTAT1_ONOFD1I (1 << 3)
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#define MC13783_IRQSTAT1_ONOFD2I (1 << 4)
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#define MC13783_IRQSTAT1_ONOFD3I (1 << 5)
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#define MC13783_IRQSTAT1_SYSRSTI (1 << 6)
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#define MC13783_IRQSTAT1_RTCRSTI (1 << 7)
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#define MC13783_IRQSTAT1_PCI (1 << 8)
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#define MC13783_IRQSTAT1_WARMI (1 << 9)
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#define MC13783_IRQSTAT1_MEMHLDI (1 << 10)
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#define MC13783_IRQSTAT1_PWRRDYI (1 << 11)
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#define MC13783_IRQSTAT1_THWARNLI (1 << 12)
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#define MC13783_IRQSTAT1_THWARNHI (1 << 13)
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#define MC13783_IRQSTAT1_CLKI (1 << 14)
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#define MC13783_IRQSTAT1_SEMAFI (1 << 15)
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#define MC13783_IRQSTAT1_MC2BI (1 << 17)
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#define MC13783_IRQSTAT1_HSDETI (1 << 18)
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#define MC13783_IRQSTAT1_HSLI (1 << 19)
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#define MC13783_IRQSTAT1_ALSPTHI (1 << 20)
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#define MC13783_IRQSTAT1_AHSSHORTI (1 << 21)
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#define MC13783_IRQMASK1 4
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#define MC13783_IRQMASK1_1HZM MC13783_IRQSTAT1_1HZI
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#define MC13783_IRQMASK1_TODAM MC13783_IRQSTAT1_TODAI
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#define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I
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#define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I
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#define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I
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#define MC13783_IRQMASK1_SYSRSTM MC13783_IRQSTAT1_SYSRSTI
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#define MC13783_IRQMASK1_RTCRSTM MC13783_IRQSTAT1_RTCRSTI
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#define MC13783_IRQMASK1_PCM MC13783_IRQSTAT1_PCI
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#define MC13783_IRQMASK1_WARMM MC13783_IRQSTAT1_WARMI
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#define MC13783_IRQMASK1_MEMHLDM MC13783_IRQSTAT1_MEMHLDI
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#define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI
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#define MC13783_IRQMASK1_THWARNLM MC13783_IRQSTAT1_THWARNLI
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#define MC13783_IRQMASK1_THWARNHM MC13783_IRQSTAT1_THWARNHI
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#define MC13783_IRQMASK1_CLKM MC13783_IRQSTAT1_CLKI
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#define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI
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#define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI
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#define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI
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#define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI
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#define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI
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#define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI
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#define MC13783_ADC1 44
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#define MC13783_ADC1_ADEN (1 << 0)
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#define MC13783_ADC1_RAND (1 << 1)
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#define MC13783_ADC1_ADSEL (1 << 3)
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#define MC13783_ADC1_ASC (1 << 20)
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#define MC13783_ADC1_ADTRIGIGN (1 << 21)
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#define MC13783_NUMREGS 0x3f
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void mc13783_lock(struct mc13783 *mc13783)
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{
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struct spi_transfer t = {
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.tx_buf = (const void *)buf,
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.rx_buf = buf,
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.len = len,
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.cs_change = 0,
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.delay_usecs = 0,
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};
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if (!mutex_trylock(&mc13783->lock)) {
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dev_dbg(&mc13783->spidev->dev, "wait for %s from %pf\n",
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__func__, __builtin_return_address(0));
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mutex_lock(&mc13783->lock);
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}
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dev_dbg(&mc13783->spidev->dev, "%s from %pf\n",
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__func__, __builtin_return_address(0));
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}
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EXPORT_SYMBOL(mc13783_lock);
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void mc13783_unlock(struct mc13783 *mc13783)
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{
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dev_dbg(&mc13783->spidev->dev, "%s from %pf\n",
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__func__, __builtin_return_address(0));
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mutex_unlock(&mc13783->lock);
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}
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EXPORT_SYMBOL(mc13783_unlock);
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#define MC13783_REGOFFSET_SHIFT 25
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int mc13783_reg_read(struct mc13783 *mc13783, unsigned int offset, u32 *val)
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{
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struct spi_transfer t;
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struct spi_message m;
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int ret;
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BUG_ON(!mutex_is_locked(&mc13783->lock));
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if (offset > MC13783_NUMREGS)
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return -EINVAL;
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*val = offset << MC13783_REGOFFSET_SHIFT;
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memset(&t, 0, sizeof(t));
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t.tx_buf = val;
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t.rx_buf = val;
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t.len = sizeof(u32);
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spi_message_init(&m);
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spi_message_add_tail(&t, &m);
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if (spi_sync(spi, &m) != 0 || m.status != 0)
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return -EINVAL;
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return len - m.actual_length;
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ret = spi_sync(mc13783->spidev, &m);
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/* error in message.status implies error return from spi_sync */
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BUG_ON(!ret && m.status);
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if (ret)
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return ret;
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*val &= 0xffffff;
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dev_vdbg(&mc13783->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
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return 0;
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}
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EXPORT_SYMBOL(mc13783_reg_read);
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static int mc13783_read(struct mc13783 *mc13783, int reg_num, u32 *reg_val)
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{
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unsigned int frame = 0;
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int ret = 0;
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if (reg_num > MC13783_MAX_REG_NUM)
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return -EINVAL;
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frame |= reg_num << MC13783_REG_NUM_SHIFT;
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ret = spi_rw(mc13783->spi_device, (u8 *)&frame, 4);
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*reg_val = frame & MC13783_FRAME_MASK;
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return ret;
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}
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static int mc13783_write(struct mc13783 *mc13783, int reg_num, u32 reg_val)
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{
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unsigned int frame = 0;
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if (reg_num > MC13783_MAX_REG_NUM)
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return -EINVAL;
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frame |= (1 << MC13783_WRITE_BIT_SHIFT);
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frame |= reg_num << MC13783_REG_NUM_SHIFT;
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frame |= reg_val & MC13783_FRAME_MASK;
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return spi_rw(mc13783->spi_device, (u8 *)&frame, 4);
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}
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int mc13783_reg_read(struct mc13783 *mc13783, int reg_num, u32 *reg_val)
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int mc13783_reg_write(struct mc13783 *mc13783, unsigned int offset, u32 val)
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{
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u32 buf;
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struct spi_transfer t;
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struct spi_message m;
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int ret;
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mutex_lock(&mc13783->io_lock);
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ret = mc13783_read(mc13783, reg_num, reg_val);
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mutex_unlock(&mc13783->io_lock);
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BUG_ON(!mutex_is_locked(&mc13783->lock));
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return ret;
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}
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EXPORT_SYMBOL_GPL(mc13783_reg_read);
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dev_vdbg(&mc13783->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val);
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int mc13783_reg_write(struct mc13783 *mc13783, int reg_num, u32 reg_val)
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{
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int ret;
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mutex_lock(&mc13783->io_lock);
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ret = mc13783_write(mc13783, reg_num, reg_val);
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mutex_unlock(&mc13783->io_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(mc13783_reg_write);
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/**
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* mc13783_set_bits - Bitmask write
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*
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* @mc13783: Pointer to mc13783 control structure
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* @reg: Register to access
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* @mask: Mask of bits to change
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* @val: Value to set for masked bits
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*/
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int mc13783_set_bits(struct mc13783 *mc13783, int reg, u32 mask, u32 val)
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{
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u32 tmp;
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int ret;
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mutex_lock(&mc13783->io_lock);
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ret = mc13783_read(mc13783, reg, &tmp);
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tmp = (tmp & ~mask) | val;
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if (ret == 0)
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ret = mc13783_write(mc13783, reg, tmp);
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mutex_unlock(&mc13783->io_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(mc13783_set_bits);
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int mc13783_register_irq(struct mc13783 *mc13783, int irq,
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void (*handler) (int, void *), void *data)
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{
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if (irq < 0 || irq > MC13783_NUM_IRQ || !handler)
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if (offset > MC13783_NUMREGS || val > 0xffffff)
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return -EINVAL;
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if (WARN_ON(mc13783->irq_handler[irq].handler))
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buf = 1 << 31 | offset << MC13783_REGOFFSET_SHIFT | val;
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memset(&t, 0, sizeof(t));
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t.tx_buf = &buf;
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t.rx_buf = &buf;
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t.len = sizeof(u32);
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spi_message_init(&m);
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spi_message_add_tail(&t, &m);
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ret = spi_sync(mc13783->spidev, &m);
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BUG_ON(!ret && m.status);
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if (ret)
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return ret;
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return 0;
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}
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EXPORT_SYMBOL(mc13783_reg_write);
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int mc13783_reg_rmw(struct mc13783 *mc13783, unsigned int offset,
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u32 mask, u32 val)
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{
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int ret;
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u32 valread;
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BUG_ON(val & ~mask);
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ret = mc13783_reg_read(mc13783, offset, &valread);
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if (ret)
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return ret;
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valread = (valread & ~mask) | val;
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return mc13783_reg_write(mc13783, offset, valread);
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}
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EXPORT_SYMBOL(mc13783_reg_rmw);
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int mc13783_mask(struct mc13783 *mc13783, int irq)
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{
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int ret;
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unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1;
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u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
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u32 mask;
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if (irq < 0 || irq >= MC13783_NUM_IRQ)
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return -EINVAL;
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ret = mc13783_reg_read(mc13783, offmask, &mask);
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if (ret)
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return ret;
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if (mask & irqbit)
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/* already masked */
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return 0;
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return mc13783_reg_write(mc13783, offmask, mask | irqbit);
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}
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EXPORT_SYMBOL(mc13783_mask);
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int mc13783_unmask(struct mc13783 *mc13783, int irq)
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{
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int ret;
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unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1;
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u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
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u32 mask;
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if (irq < 0 || irq >= MC13783_NUM_IRQ)
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return -EINVAL;
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ret = mc13783_reg_read(mc13783, offmask, &mask);
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if (ret)
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return ret;
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if (!(mask & irqbit))
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/* already unmasked */
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return 0;
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||||
return mc13783_reg_write(mc13783, offmask, mask & ~irqbit);
|
||||
}
|
||||
EXPORT_SYMBOL(mc13783_unmask);
|
||||
|
||||
int mc13783_irq_request_nounmask(struct mc13783 *mc13783, int irq,
|
||||
irq_handler_t handler, const char *name, void *dev)
|
||||
{
|
||||
BUG_ON(!mutex_is_locked(&mc13783->lock));
|
||||
BUG_ON(!handler);
|
||||
|
||||
if (irq < 0 || irq >= MC13783_NUM_IRQ)
|
||||
return -EINVAL;
|
||||
|
||||
if (mc13783->irqhandler[irq])
|
||||
return -EBUSY;
|
||||
|
||||
mutex_lock(&mc13783->io_lock);
|
||||
mc13783->irq_handler[irq].handler = handler;
|
||||
mc13783->irq_handler[irq].data = data;
|
||||
mutex_unlock(&mc13783->io_lock);
|
||||
mc13783->irqhandler[irq] = handler;
|
||||
mc13783->irqdata[irq] = dev;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(mc13783_register_irq);
|
||||
EXPORT_SYMBOL(mc13783_irq_request_nounmask);
|
||||
|
||||
int mc13783_free_irq(struct mc13783 *mc13783, int irq)
|
||||
int mc13783_irq_request(struct mc13783 *mc13783, int irq,
|
||||
irq_handler_t handler, const char *name, void *dev)
|
||||
{
|
||||
if (irq < 0 || irq > MC13783_NUM_IRQ)
|
||||
int ret;
|
||||
|
||||
ret = mc13783_irq_request_nounmask(mc13783, irq, handler, name, dev);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = mc13783_unmask(mc13783, irq);
|
||||
if (ret) {
|
||||
mc13783->irqhandler[irq] = NULL;
|
||||
mc13783->irqdata[irq] = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(mc13783_irq_request);
|
||||
|
||||
int mc13783_irq_free(struct mc13783 *mc13783, int irq, void *dev)
|
||||
{
|
||||
int ret;
|
||||
BUG_ON(!mutex_is_locked(&mc13783->lock));
|
||||
|
||||
if (irq < 0 || irq >= MC13783_NUM_IRQ || !mc13783->irqhandler[irq] ||
|
||||
mc13783->irqdata[irq] != dev)
|
||||
return -EINVAL;
|
||||
|
||||
mutex_lock(&mc13783->io_lock);
|
||||
mc13783->irq_handler[irq].handler = NULL;
|
||||
mutex_unlock(&mc13783->io_lock);
|
||||
ret = mc13783_mask(mc13783, irq);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
mc13783->irqhandler[irq] = NULL;
|
||||
mc13783->irqdata[irq] = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(mc13783_free_irq);
|
||||
EXPORT_SYMBOL(mc13783_irq_free);
|
||||
|
||||
static void mc13783_irq_work(struct work_struct *work)
|
||||
static inline irqreturn_t mc13783_irqhandler(struct mc13783 *mc13783, int irq)
|
||||
{
|
||||
struct mc13783 *mc13783 = container_of(work, struct mc13783, work);
|
||||
int i;
|
||||
unsigned int adc_sts;
|
||||
|
||||
/* check if the adc has finished any completion */
|
||||
mc13783_reg_read(mc13783, MC13783_REG_INTERRUPT_STATUS_0, &adc_sts);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_INTERRUPT_STATUS_0,
|
||||
adc_sts & MC13783_INT_STAT_ADCDONEI);
|
||||
|
||||
if (adc_sts & MC13783_INT_STAT_ADCDONEI)
|
||||
complete_all(&mc13783->adc_done);
|
||||
|
||||
for (i = 0; i < MC13783_NUM_IRQ; i++)
|
||||
if (mc13783->irq_handler[i].handler)
|
||||
mc13783->irq_handler[i].handler(i,
|
||||
mc13783->irq_handler[i].data);
|
||||
enable_irq(mc13783->irq);
|
||||
return mc13783->irqhandler[irq](irq, mc13783->irqdata[irq]);
|
||||
}
|
||||
|
||||
static irqreturn_t mc13783_interrupt(int irq, void *dev_id)
|
||||
int mc13783_ackirq(struct mc13783 *mc13783, int irq)
|
||||
{
|
||||
struct mc13783 *mc13783 = dev_id;
|
||||
unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1;
|
||||
unsigned int val = 1 << (irq < 24 ? irq : irq - 24);
|
||||
|
||||
disable_irq_nosync(irq);
|
||||
BUG_ON(irq < 0 || irq >= MC13783_NUM_IRQ);
|
||||
|
||||
return mc13783_reg_write(mc13783, offstat, val);
|
||||
}
|
||||
EXPORT_SYMBOL(mc13783_ackirq);
|
||||
|
||||
/*
|
||||
* returns: number of handled irqs or negative error
|
||||
* locking: holds mc13783->lock
|
||||
*/
|
||||
static int mc13783_irq_handle(struct mc13783 *mc13783,
|
||||
unsigned int offstat, unsigned int offmask, int baseirq)
|
||||
{
|
||||
u32 stat, mask;
|
||||
int ret = mc13783_reg_read(mc13783, offstat, &stat);
|
||||
int num_handled = 0;
|
||||
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = mc13783_reg_read(mc13783, offmask, &mask);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
while (stat & ~mask) {
|
||||
int irq = __ffs(stat & ~mask);
|
||||
|
||||
stat &= ~(1 << irq);
|
||||
|
||||
if (likely(mc13783->irqhandler[baseirq + irq])) {
|
||||
irqreturn_t handled;
|
||||
|
||||
handled = mc13783_irqhandler(mc13783, baseirq + irq);
|
||||
if (handled == IRQ_HANDLED)
|
||||
num_handled++;
|
||||
} else {
|
||||
dev_err(&mc13783->spidev->dev,
|
||||
"BUG: irq %u but no handler\n",
|
||||
baseirq + irq);
|
||||
|
||||
mask |= 1 << irq;
|
||||
|
||||
ret = mc13783_reg_write(mc13783, offmask, mask);
|
||||
}
|
||||
}
|
||||
|
||||
return num_handled;
|
||||
}
|
||||
|
||||
static irqreturn_t mc13783_irq_thread(int irq, void *data)
|
||||
{
|
||||
struct mc13783 *mc13783 = data;
|
||||
irqreturn_t ret;
|
||||
int handled = 0;
|
||||
|
||||
mc13783_lock(mc13783);
|
||||
|
||||
ret = mc13783_irq_handle(mc13783, MC13783_IRQSTAT0,
|
||||
MC13783_IRQMASK0, MC13783_IRQ_ADCDONE);
|
||||
if (ret > 0)
|
||||
handled = 1;
|
||||
|
||||
ret = mc13783_irq_handle(mc13783, MC13783_IRQSTAT1,
|
||||
MC13783_IRQMASK1, MC13783_IRQ_1HZ);
|
||||
if (ret > 0)
|
||||
handled = 1;
|
||||
|
||||
mc13783_unlock(mc13783);
|
||||
|
||||
return IRQ_RETVAL(handled);
|
||||
}
|
||||
|
||||
#define MC13783_ADC1_CHAN0_SHIFT 5
|
||||
#define MC13783_ADC1_CHAN1_SHIFT 8
|
||||
|
||||
struct mc13783_adcdone_data {
|
||||
struct mc13783 *mc13783;
|
||||
struct completion done;
|
||||
};
|
||||
|
||||
static irqreturn_t mc13783_handler_adcdone(int irq, void *data)
|
||||
{
|
||||
struct mc13783_adcdone_data *adcdone_data = data;
|
||||
|
||||
mc13783_ackirq(adcdone_data->mc13783, irq);
|
||||
|
||||
complete_all(&adcdone_data->done);
|
||||
|
||||
schedule_work(&mc13783->work);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* set adc to ts interrupt mode, which generates touchscreen wakeup interrupt */
|
||||
static inline void mc13783_adc_set_ts_irq_mode(struct mc13783 *mc13783)
|
||||
{
|
||||
unsigned int reg_adc0, reg_adc1;
|
||||
|
||||
reg_adc0 = MC13783_ADC0_ADREFEN | MC13783_ADC0_ADREFMODE
|
||||
| MC13783_ADC0_TSMOD0;
|
||||
reg_adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN;
|
||||
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_0, reg_adc0);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_1, reg_adc1);
|
||||
}
|
||||
#define MC13783_ADC_WORKING (1 << 16)
|
||||
|
||||
int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,
|
||||
unsigned int channel, unsigned int *sample)
|
||||
{
|
||||
unsigned int reg_adc0, reg_adc1;
|
||||
int i;
|
||||
u32 adc0, adc1, old_adc0;
|
||||
int i, ret;
|
||||
struct mc13783_adcdone_data adcdone_data = {
|
||||
.mc13783 = mc13783,
|
||||
};
|
||||
init_completion(&adcdone_data.done);
|
||||
|
||||
mutex_lock(&mc13783->adc_conv_lock);
|
||||
dev_dbg(&mc13783->spidev->dev, "%s\n", __func__);
|
||||
|
||||
/* set up auto incrementing anyway to make quick read */
|
||||
reg_adc0 = MC13783_ADC0_ADINC1 | MC13783_ADC0_ADINC2;
|
||||
/* enable the adc, ignore external triggering and set ASC to trigger
|
||||
* conversion */
|
||||
reg_adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN
|
||||
| MC13783_ADC1_ASC;
|
||||
mc13783_lock(mc13783);
|
||||
|
||||
if (mc13783->flags & MC13783_ADC_WORKING) {
|
||||
ret = -EBUSY;
|
||||
goto out;
|
||||
}
|
||||
|
||||
mc13783->flags |= MC13783_ADC_WORKING;
|
||||
|
||||
mc13783_reg_read(mc13783, MC13783_ADC0, &old_adc0);
|
||||
|
||||
adc0 = MC13783_ADC0_ADINC1 | MC13783_ADC0_ADINC2;
|
||||
adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN | MC13783_ADC1_ASC;
|
||||
|
||||
/* setup channel number */
|
||||
if (channel > 7)
|
||||
reg_adc1 |= MC13783_ADC1_ADSEL;
|
||||
adc1 |= MC13783_ADC1_ADSEL;
|
||||
|
||||
switch (mode) {
|
||||
case MC13783_ADC_MODE_TS:
|
||||
/* enables touch screen reference mode and set touchscreen mode
|
||||
* to position mode */
|
||||
reg_adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_ADREFMODE
|
||||
adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_ADREFMODE
|
||||
| MC13783_ADC0_TSMOD0 | MC13783_ADC0_TSMOD1;
|
||||
reg_adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
|
||||
adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
|
||||
break;
|
||||
|
||||
case MC13783_ADC_MODE_SINGLE_CHAN:
|
||||
reg_adc1 |= (channel & 0x7) << MC13783_ADC1_CHAN0_SHIFT;
|
||||
reg_adc1 |= MC13783_ADC1_RAND;
|
||||
adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
|
||||
adc1 |= (channel & 0x7) << MC13783_ADC1_CHAN0_SHIFT;
|
||||
adc1 |= MC13783_ADC1_RAND;
|
||||
break;
|
||||
|
||||
case MC13783_ADC_MODE_MULT_CHAN:
|
||||
reg_adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
|
||||
adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
|
||||
adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
|
||||
break;
|
||||
|
||||
default:
|
||||
mc13783_unlock(mc13783);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_0, reg_adc0);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_1, reg_adc1);
|
||||
dev_dbg(&mc13783->spidev->dev, "%s: request irq\n", __func__);
|
||||
mc13783_irq_request(mc13783, MC13783_IRQ_ADCDONE,
|
||||
mc13783_handler_adcdone, __func__, &adcdone_data);
|
||||
mc13783_ackirq(mc13783, MC13783_IRQ_ADCDONE);
|
||||
|
||||
wait_for_completion_interruptible(&mc13783->adc_done);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_0, adc0);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_1, adc1);
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
mc13783_reg_read(mc13783, MC13783_REG_ADC_2, &sample[i]);
|
||||
mc13783_unlock(mc13783);
|
||||
|
||||
if (mc13783->ts_active)
|
||||
mc13783_adc_set_ts_irq_mode(mc13783);
|
||||
ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
|
||||
|
||||
mutex_unlock(&mc13783->adc_conv_lock);
|
||||
if (!ret)
|
||||
ret = -ETIMEDOUT;
|
||||
|
||||
return 0;
|
||||
mc13783_lock(mc13783);
|
||||
|
||||
mc13783_irq_free(mc13783, MC13783_IRQ_ADCDONE, &adcdone_data);
|
||||
|
||||
if (ret > 0)
|
||||
for (i = 0; i < 4; ++i) {
|
||||
ret = mc13783_reg_read(mc13783,
|
||||
MC13783_REG_ADC_2, &sample[i]);
|
||||
if (ret)
|
||||
break;
|
||||
}
|
||||
|
||||
if (mode == MC13783_ADC_MODE_TS)
|
||||
/* restore TSMOD */
|
||||
mc13783_reg_write(mc13783, MC13783_REG_ADC_0, old_adc0);
|
||||
|
||||
mc13783->flags &= ~MC13783_ADC_WORKING;
|
||||
out:
|
||||
mc13783_unlock(mc13783);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(mc13783_adc_do_conversion);
|
||||
|
||||
void mc13783_adc_set_ts_status(struct mc13783 *mc13783, unsigned int status)
|
||||
static int mc13783_add_subdevice_pdata(struct mc13783 *mc13783,
|
||||
const char *name, void *pdata, size_t pdata_size)
|
||||
{
|
||||
mc13783->ts_active = status;
|
||||
struct mfd_cell cell = {
|
||||
.name = name,
|
||||
.platform_data = pdata,
|
||||
.data_size = pdata_size,
|
||||
};
|
||||
|
||||
return mfd_add_devices(&mc13783->spidev->dev, -1, &cell, 1, NULL, 0);
|
||||
}
|
||||
|
||||
static int mc13783_add_subdevice(struct mc13783 *mc13783, const char *name)
|
||||
{
|
||||
return mc13783_add_subdevice_pdata(mc13783, name, NULL, 0);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(mc13783_adc_set_ts_status);
|
||||
|
||||
static int mc13783_check_revision(struct mc13783 *mc13783)
|
||||
{
|
||||
u32 rev_id, rev1, rev2, finid, icid;
|
||||
|
||||
mc13783_read(mc13783, MC13783_REG_REVISION, &rev_id);
|
||||
mc13783_reg_read(mc13783, MC13783_REG_REVISION, &rev_id);
|
||||
|
||||
rev1 = (rev_id & 0x018) >> 3;
|
||||
rev2 = (rev_id & 0x007);
|
||||
|
|
@ -292,38 +555,24 @@ static int mc13783_check_revision(struct mc13783 *mc13783)
|
|||
rev1 = 3;
|
||||
|
||||
if (rev1 == 0 || icid != 2) {
|
||||
dev_err(mc13783->dev, "No MC13783 detected.\n");
|
||||
dev_err(&mc13783->spidev->dev, "No MC13783 detected.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
mc13783->revision = ((rev1 * 10) + rev2);
|
||||
dev_info(mc13783->dev, "MC13783 Rev %d.%d FinVer %x detected\n", rev1,
|
||||
rev2, finid);
|
||||
dev_info(&mc13783->spidev->dev,
|
||||
"MC13783 Rev %d.%d FinVer %x detected\n",
|
||||
rev1, rev2, finid);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Register a client device. This is non-fatal since there is no need to
|
||||
* fail the entire device init due to a single platform device failing.
|
||||
*/
|
||||
static void mc13783_client_dev_register(struct mc13783 *mc13783,
|
||||
const char *name)
|
||||
{
|
||||
struct mfd_cell cell = {};
|
||||
|
||||
cell.name = name;
|
||||
|
||||
mfd_add_devices(mc13783->dev, -1, &cell, 1, NULL, 0);
|
||||
}
|
||||
|
||||
static int __devinit mc13783_probe(struct spi_device *spi)
|
||||
static int mc13783_probe(struct spi_device *spi)
|
||||
{
|
||||
struct mc13783 *mc13783;
|
||||
struct mc13783_platform_data *pdata = spi->dev.platform_data;
|
||||
struct mc13783_platform_data *pdata = dev_get_platdata(&spi->dev);
|
||||
int ret;
|
||||
|
||||
mc13783 = kzalloc(sizeof(struct mc13783), GFP_KERNEL);
|
||||
mc13783 = kzalloc(sizeof(*mc13783), GFP_KERNEL);
|
||||
if (!mc13783)
|
||||
return -ENOMEM;
|
||||
|
||||
|
|
@ -332,96 +581,104 @@ static int __devinit mc13783_probe(struct spi_device *spi)
|
|||
spi->bits_per_word = 32;
|
||||
spi_setup(spi);
|
||||
|
||||
mc13783->spi_device = spi;
|
||||
mc13783->dev = &spi->dev;
|
||||
mc13783->irq = spi->irq;
|
||||
mc13783->spidev = spi;
|
||||
|
||||
INIT_WORK(&mc13783->work, mc13783_irq_work);
|
||||
mutex_init(&mc13783->io_lock);
|
||||
mutex_init(&mc13783->adc_conv_lock);
|
||||
init_completion(&mc13783->adc_done);
|
||||
mutex_init(&mc13783->lock);
|
||||
mc13783_lock(mc13783);
|
||||
|
||||
ret = mc13783_check_revision(mc13783);
|
||||
if (ret)
|
||||
goto err_revision;
|
||||
|
||||
/* mask all irqs */
|
||||
ret = mc13783_reg_write(mc13783, MC13783_IRQMASK0, 0x00ffffff);
|
||||
if (ret)
|
||||
goto err_mask;
|
||||
|
||||
ret = mc13783_reg_write(mc13783, MC13783_IRQMASK1, 0x00ffffff);
|
||||
if (ret)
|
||||
goto err_mask;
|
||||
|
||||
ret = request_threaded_irq(spi->irq, NULL, mc13783_irq_thread,
|
||||
IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13783", mc13783);
|
||||
|
||||
if (ret) {
|
||||
err_mask:
|
||||
err_revision:
|
||||
mutex_unlock(&mc13783->lock);
|
||||
dev_set_drvdata(&spi->dev, NULL);
|
||||
kfree(mc13783);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* This should go away (BEGIN) */
|
||||
if (pdata) {
|
||||
mc13783->flags = pdata->flags;
|
||||
mc13783->regulators = pdata->regulators;
|
||||
mc13783->num_regulators = pdata->num_regulators;
|
||||
}
|
||||
/* This should go away (END) */
|
||||
|
||||
if (mc13783_check_revision(mc13783)) {
|
||||
ret = -ENODEV;
|
||||
goto err_out;
|
||||
if (pdata->flags & MC13783_USE_ADC)
|
||||
mc13783_add_subdevice(mc13783, "mc13783-adc");
|
||||
|
||||
if (pdata->flags & MC13783_USE_CODEC)
|
||||
mc13783_add_subdevice(mc13783, "mc13783-codec");
|
||||
|
||||
if (pdata->flags & MC13783_USE_REGULATOR) {
|
||||
struct mc13783_regulator_platform_data regulator_pdata = {
|
||||
.num_regulators = pdata->num_regulators,
|
||||
.regulators = pdata->regulators,
|
||||
};
|
||||
|
||||
mc13783_add_subdevice_pdata(mc13783, "mc13783-regulator",
|
||||
®ulator_pdata, sizeof(regulator_pdata));
|
||||
}
|
||||
|
||||
/* clear and mask all interrupts */
|
||||
mc13783_reg_write(mc13783, MC13783_REG_INTERRUPT_STATUS_0, 0x00ffffff);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_INTERRUPT_MASK_0, 0x00ffffff);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_INTERRUPT_STATUS_1, 0x00ffffff);
|
||||
mc13783_reg_write(mc13783, MC13783_REG_INTERRUPT_MASK_1, 0x00ffffff);
|
||||
if (pdata->flags & MC13783_USE_RTC)
|
||||
mc13783_add_subdevice(mc13783, "mc13783-rtc");
|
||||
|
||||
/* unmask adcdone interrupts */
|
||||
mc13783_set_bits(mc13783, MC13783_REG_INTERRUPT_MASK_0,
|
||||
MC13783_INT_MASK_ADCDONEM, 0);
|
||||
if (pdata->flags & MC13783_USE_TOUCHSCREEN)
|
||||
mc13783_add_subdevice(mc13783, "mc13783-ts");
|
||||
|
||||
ret = request_irq(mc13783->irq, mc13783_interrupt,
|
||||
IRQF_DISABLED | IRQF_TRIGGER_HIGH, "mc13783",
|
||||
mc13783);
|
||||
if (ret)
|
||||
goto err_out;
|
||||
|
||||
if (mc13783->flags & MC13783_USE_CODEC)
|
||||
mc13783_client_dev_register(mc13783, "mc13783-codec");
|
||||
if (mc13783->flags & MC13783_USE_ADC)
|
||||
mc13783_client_dev_register(mc13783, "mc13783-adc");
|
||||
if (mc13783->flags & MC13783_USE_RTC)
|
||||
mc13783_client_dev_register(mc13783, "mc13783-rtc");
|
||||
if (mc13783->flags & MC13783_USE_REGULATOR)
|
||||
mc13783_client_dev_register(mc13783, "mc13783-regulator");
|
||||
if (mc13783->flags & MC13783_USE_TOUCHSCREEN)
|
||||
mc13783_client_dev_register(mc13783, "mc13783-ts");
|
||||
mc13783_unlock(mc13783);
|
||||
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
kfree(mc13783);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit mc13783_remove(struct spi_device *spi)
|
||||
{
|
||||
struct mc13783 *mc13783;
|
||||
struct mc13783 *mc13783 = dev_get_drvdata(&spi->dev);
|
||||
|
||||
mc13783 = dev_get_drvdata(&spi->dev);
|
||||
|
||||
free_irq(mc13783->irq, mc13783);
|
||||
free_irq(mc13783->spidev->irq, mc13783);
|
||||
|
||||
mfd_remove_devices(&spi->dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct spi_driver pmic_driver = {
|
||||
static struct spi_driver mc13783_driver = {
|
||||
.driver = {
|
||||
.name = "mc13783",
|
||||
.bus = &spi_bus_type,
|
||||
.owner = THIS_MODULE,
|
||||
.name = "mc13783",
|
||||
.bus = &spi_bus_type,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = mc13783_probe,
|
||||
.remove = __devexit_p(mc13783_remove),
|
||||
};
|
||||
|
||||
static int __init pmic_init(void)
|
||||
static int __init mc13783_init(void)
|
||||
{
|
||||
return spi_register_driver(&pmic_driver);
|
||||
return spi_register_driver(&mc13783_driver);
|
||||
}
|
||||
subsys_initcall(pmic_init);
|
||||
subsys_initcall(mc13783_init);
|
||||
|
||||
static void __exit pmic_exit(void)
|
||||
static void __exit mc13783_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&pmic_driver);
|
||||
spi_unregister_driver(&mc13783_driver);
|
||||
}
|
||||
module_exit(pmic_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Core/Protocol driver for Freescale MC13783 PMIC");
|
||||
MODULE_AUTHOR("Sascha Hauer <[email protected]>");
|
||||
MODULE_LICENSE("GPL");
|
||||
module_exit(mc13783_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Core driver for Freescale MC13783 PMIC");
|
||||
MODULE_AUTHOR("Uwe Kleine-Koenig <[email protected]>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
|
|
|||
Loading…
Reference in a new issue