diff options
Diffstat (limited to 'drivers/mfd/mc13783-core.c')
| -rw-r--r-- | drivers/mfd/mc13783-core.c | 427 |
1 files changed, 0 insertions, 427 deletions
diff --git a/drivers/mfd/mc13783-core.c b/drivers/mfd/mc13783-core.c deleted file mode 100644 index e354d2912ef..00000000000 --- a/drivers/mfd/mc13783-core.c +++ /dev/null @@ -1,427 +0,0 @@ -/* - * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de> - * - * This code is in parts based on wm8350-core.c and pcf50633-core.c - * - * Initial development of this code was funded by - * Phytec Messtechnik GmbH, http://www.phytec.de - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/mfd/mc13783-private.h> -#include <linux/platform_device.h> -#include <linux/mfd/mc13783.h> -#include <linux/completion.h> -#include <linux/interrupt.h> -#include <linux/mfd/core.h> -#include <linux/spi/spi.h> -#include <linux/uaccess.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/irq.h> - -#define MC13783_MAX_REG_NUM 0x3f -#define MC13783_FRAME_MASK 0x00ffffff -#define MC13783_MAX_REG_NUM 0x3f -#define MC13783_REG_NUM_SHIFT 0x19 -#define MC13783_WRITE_BIT_SHIFT 31 - -static inline int spi_rw(struct spi_device *spi, u8 * buf, size_t len) -{ - struct spi_transfer t = { - .tx_buf = (const void *)buf, - .rx_buf = buf, - .len = len, - .cs_change = 0, - .delay_usecs = 0, - }; - struct spi_message m; - - spi_message_init(&m); - spi_message_add_tail(&t, &m); - if (spi_sync(spi, &m) != 0 || m.status != 0) - return -EINVAL; - return len - m.actual_length; -} - -static int mc13783_read(struct mc13783 *mc13783, int reg_num, u32 *reg_val) -{ - unsigned int frame = 0; - int ret = 0; - - if (reg_num > MC13783_MAX_REG_NUM) - return -EINVAL; - - frame |= reg_num << MC13783_REG_NUM_SHIFT; - - ret = spi_rw(mc13783->spi_device, (u8 *)&frame, 4); - - *reg_val = frame & MC13783_FRAME_MASK; - - return ret; -} - -static int mc13783_write(struct mc13783 *mc13783, int reg_num, u32 reg_val) -{ - unsigned int frame = 0; - - if (reg_num > MC13783_MAX_REG_NUM) - return -EINVAL; - - frame |= (1 << MC13783_WRITE_BIT_SHIFT); - frame |= reg_num << MC13783_REG_NUM_SHIFT; - frame |= reg_val & MC13783_FRAME_MASK; - - return spi_rw(mc13783->spi_device, (u8 *)&frame, 4); -} - -int mc13783_reg_read(struct mc13783 *mc13783, int reg_num, u32 *reg_val) -{ - int ret; - - mutex_lock(&mc13783->io_lock); - ret = mc13783_read(mc13783, reg_num, reg_val); - mutex_unlock(&mc13783->io_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(mc13783_reg_read); - -int mc13783_reg_write(struct mc13783 *mc13783, int reg_num, u32 reg_val) -{ - int ret; - - mutex_lock(&mc13783->io_lock); - ret = mc13783_write(mc13783, reg_num, reg_val); - mutex_unlock(&mc13783->io_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(mc13783_reg_write); - -/** - * mc13783_set_bits - Bitmask write - * - * @mc13783: Pointer to mc13783 control structure - * @reg: Register to access - * @mask: Mask of bits to change - * @val: Value to set for masked bits - */ -int mc13783_set_bits(struct mc13783 *mc13783, int reg, u32 mask, u32 val) -{ - u32 tmp; - int ret; - - mutex_lock(&mc13783->io_lock); - - ret = mc13783_read(mc13783, reg, &tmp); - tmp = (tmp & ~mask) | val; - if (ret == 0) - ret = mc13783_write(mc13783, reg, tmp); - - mutex_unlock(&mc13783->io_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(mc13783_set_bits); - -int mc13783_register_irq(struct mc13783 *mc13783, int irq, - void (*handler) (int, void *), void *data) -{ - if (irq < 0 || irq > MC13783_NUM_IRQ || !handler) - return -EINVAL; - - if (WARN_ON(mc13783->irq_handler[irq].handler)) - return -EBUSY; - - mutex_lock(&mc13783->io_lock); - mc13783->irq_handler[irq].handler = handler; - mc13783->irq_handler[irq].data = data; - mutex_unlock(&mc13783->io_lock); - - return 0; -} -EXPORT_SYMBOL_GPL(mc13783_register_irq); - -int mc13783_free_irq(struct mc13783 *mc13783, int irq) -{ - if (irq < 0 || irq > MC13783_NUM_IRQ) - return -EINVAL; - - mutex_lock(&mc13783->io_lock); - mc13783->irq_handler[irq].handler = NULL; - mutex_unlock(&mc13783->io_lock); - - return 0; -} -EXPORT_SYMBOL_GPL(mc13783_free_irq); - -static void mc13783_irq_work(struct work_struct *work) -{ - 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); -} - -static irqreturn_t mc13783_interrupt(int irq, void *dev_id) -{ - struct mc13783 *mc13783 = dev_id; - - disable_irq_nosync(irq); - - 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); -} - -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; - - mutex_lock(&mc13783->adc_conv_lock); - - /* 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; - - /* setup channel number */ - if (channel > 7) - reg_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 - | MC13783_ADC0_TSMOD0 | MC13783_ADC0_TSMOD1; - reg_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; - break; - case MC13783_ADC_MODE_MULT_CHAN: - reg_adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT; - break; - default: - return -EINVAL; - } - - mc13783_reg_write(mc13783, MC13783_REG_ADC_0, reg_adc0); - mc13783_reg_write(mc13783, MC13783_REG_ADC_1, reg_adc1); - - wait_for_completion_interruptible(&mc13783->adc_done); - - for (i = 0; i < 4; i++) - mc13783_reg_read(mc13783, MC13783_REG_ADC_2, &sample[i]); - - if (mc13783->ts_active) - mc13783_adc_set_ts_irq_mode(mc13783); - - mutex_unlock(&mc13783->adc_conv_lock); - - return 0; -} -EXPORT_SYMBOL_GPL(mc13783_adc_do_conversion); - -void mc13783_adc_set_ts_status(struct mc13783 *mc13783, unsigned int status) -{ - mc13783->ts_active = status; -} -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); - - rev1 = (rev_id & 0x018) >> 3; - rev2 = (rev_id & 0x007); - icid = (rev_id & 0x01C0) >> 6; - finid = (rev_id & 0x01E00) >> 9; - - /* Ver 0.2 is actually 3.2a. Report as 3.2 */ - if ((rev1 == 0) && (rev2 == 2)) - rev1 = 3; - - if (rev1 == 0 || icid != 2) { - dev_err(mc13783->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); - - 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) -{ - struct mc13783 *mc13783; - struct mc13783_platform_data *pdata = spi->dev.platform_data; - int ret; - - mc13783 = kzalloc(sizeof(struct mc13783), GFP_KERNEL); - if (!mc13783) - return -ENOMEM; - - dev_set_drvdata(&spi->dev, mc13783); - spi->mode = SPI_MODE_0 | SPI_CS_HIGH; - spi->bits_per_word = 32; - spi_setup(spi); - - mc13783->spi_device = spi; - mc13783->dev = &spi->dev; - mc13783->irq = spi->irq; - - INIT_WORK(&mc13783->work, mc13783_irq_work); - mutex_init(&mc13783->io_lock); - mutex_init(&mc13783->adc_conv_lock); - init_completion(&mc13783->adc_done); - - if (pdata) { - mc13783->flags = pdata->flags; - mc13783->regulators = pdata->regulators; - mc13783->num_regulators = pdata->num_regulators; - } - - if (mc13783_check_revision(mc13783)) { - ret = -ENODEV; - goto err_out; - } - - /* 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); - - /* unmask adcdone interrupts */ - mc13783_set_bits(mc13783, MC13783_REG_INTERRUPT_MASK_0, - MC13783_INT_MASK_ADCDONEM, 0); - - 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"); - - return 0; - -err_out: - kfree(mc13783); - return ret; -} - -static int __devexit mc13783_remove(struct spi_device *spi) -{ - struct mc13783 *mc13783; - - mc13783 = dev_get_drvdata(&spi->dev); - - free_irq(mc13783->irq, mc13783); - - mfd_remove_devices(&spi->dev); - - return 0; -} - -static struct spi_driver pmic_driver = { - .driver = { - .name = "mc13783", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - .probe = mc13783_probe, - .remove = __devexit_p(mc13783_remove), -}; - -static int __init pmic_init(void) -{ - return spi_register_driver(&pmic_driver); -} -subsys_initcall(pmic_init); - -static void __exit pmic_exit(void) -{ - spi_unregister_driver(&pmic_driver); -} -module_exit(pmic_exit); - -MODULE_DESCRIPTION("Core/Protocol driver for Freescale MC13783 PMIC"); -MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); -MODULE_LICENSE("GPL"); - |