/* * Copyright 2009 Pengutronix * Uwe Kleine-Koenig * * loosely based on an earlier driver that has * Copyright 2009 Pengutronix, Sascha Hauer * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License version 2 as published by the * Free Software Foundation. */ #include #include #include #include #include #define MC13783_IRQSTAT0 0 #define MC13783_IRQSTAT0_ADCDONEI (1 << 0) #define MC13783_IRQSTAT0_ADCBISDONEI (1 << 1) #define MC13783_IRQSTAT0_TSI (1 << 2) #define MC13783_IRQSTAT0_WHIGHI (1 << 3) #define MC13783_IRQSTAT0_WLOWI (1 << 4) #define MC13783_IRQSTAT0_CHGDETI (1 << 6) #define MC13783_IRQSTAT0_CHGOVI (1 << 7) #define MC13783_IRQSTAT0_CHGREVI (1 << 8) #define MC13783_IRQSTAT0_CHGSHORTI (1 << 9) #define MC13783_IRQSTAT0_CCCVI (1 << 10) #define MC13783_IRQSTAT0_CHGCURRI (1 << 11) #define MC13783_IRQSTAT0_BPONI (1 << 12) #define MC13783_IRQSTAT0_LOBATLI (1 << 13) #define MC13783_IRQSTAT0_LOBATHI (1 << 14) #define MC13783_IRQSTAT0_UDPI (1 << 15) #define MC13783_IRQSTAT0_USBI (1 << 16) #define MC13783_IRQSTAT0_IDI (1 << 19) #define MC13783_IRQSTAT0_SE1I (1 << 21) #define MC13783_IRQSTAT0_CKDETI (1 << 22) #define MC13783_IRQSTAT0_UDMI (1 << 23) #define MC13783_IRQMASK0 1 #define MC13783_IRQMASK0_ADCDONEM MC13783_IRQSTAT0_ADCDONEI #define MC13783_IRQMASK0_ADCBISDONEM MC13783_IRQSTAT0_ADCBISDONEI #define MC13783_IRQMASK0_TSM MC13783_IRQSTAT0_TSI #define MC13783_IRQMASK0_WHIGHM MC13783_IRQSTAT0_WHIGHI #define MC13783_IRQMASK0_WLOWM MC13783_IRQSTAT0_WLOWI #define MC13783_IRQMASK0_CHGDETM MC13783_IRQSTAT0_CHGDETI #define MC13783_IRQMASK0_CHGOVM MC13783_IRQSTAT0_CHGOVI #define MC13783_IRQMASK0_CHGREVM MC13783_IRQSTAT0_CHGREVI #define MC13783_IRQMASK0_CHGSHORTM MC13783_IRQSTAT0_CHGSHORTI #define MC13783_IRQMASK0_CCCVM MC13783_IRQSTAT0_CCCVI #define MC13783_IRQMASK0_CHGCURRM MC13783_IRQSTAT0_CHGCURRI #define MC13783_IRQMASK0_BPONM MC13783_IRQSTAT0_BPONI #define MC13783_IRQMASK0_LOBATLM MC13783_IRQSTAT0_LOBATLI #define MC13783_IRQMASK0_LOBATHM MC13783_IRQSTAT0_LOBATHI #define MC13783_IRQMASK0_UDPM MC13783_IRQSTAT0_UDPI #define MC13783_IRQMASK0_USBM MC13783_IRQSTAT0_USBI #define MC13783_IRQMASK0_IDM MC13783_IRQSTAT0_IDI #define MC13783_IRQMASK0_SE1M MC13783_IRQSTAT0_SE1I #define MC13783_IRQMASK0_CKDETM MC13783_IRQSTAT0_CKDETI #define MC13783_IRQMASK0_UDMM MC13783_IRQSTAT0_UDMI #define MC13783_IRQSTAT1 3 #define MC13783_IRQSTAT1_1HZI (1 << 0) #define MC13783_IRQSTAT1_TODAI (1 << 1) #define MC13783_IRQSTAT1_ONOFD1I (1 << 3) #define MC13783_IRQSTAT1_ONOFD2I (1 << 4) #define MC13783_IRQSTAT1_ONOFD3I (1 << 5) #define MC13783_IRQSTAT1_SYSRSTI (1 << 6) #define MC13783_IRQSTAT1_RTCRSTI (1 << 7) #define MC13783_IRQSTAT1_PCI (1 << 8) #define MC13783_IRQSTAT1_WARMI (1 << 9) #define MC13783_IRQSTAT1_MEMHLDI (1 << 10) #define MC13783_IRQSTAT1_PWRRDYI (1 << 11) #define MC13783_IRQSTAT1_THWARNLI (1 << 12) #define MC13783_IRQSTAT1_THWARNHI (1 << 13) #define MC13783_IRQSTAT1_CLKI (1 << 14) #define MC13783_IRQSTAT1_SEMAFI (1 << 15) #define MC13783_IRQSTAT1_MC2BI (1 << 17) #define MC13783_IRQSTAT1_HSDETI (1 << 18) #define MC13783_IRQSTAT1_HSLI (1 << 19) #define MC13783_IRQSTAT1_ALSPTHI (1 << 20) #define MC13783_IRQSTAT1_AHSSHORTI (1 << 21) #define MC13783_IRQMASK1 4 #define MC13783_IRQMASK1_1HZM MC13783_IRQSTAT1_1HZI #define MC13783_IRQMASK1_TODAM MC13783_IRQSTAT1_TODAI #define MC13783_IRQMASK1_ONOFD1M MC13783_IRQSTAT1_ONOFD1I #define MC13783_IRQMASK1_ONOFD2M MC13783_IRQSTAT1_ONOFD2I #define MC13783_IRQMASK1_ONOFD3M MC13783_IRQSTAT1_ONOFD3I #define MC13783_IRQMASK1_SYSRSTM MC13783_IRQSTAT1_SYSRSTI #define MC13783_IRQMASK1_RTCRSTM MC13783_IRQSTAT1_RTCRSTI #define MC13783_IRQMASK1_PCM MC13783_IRQSTAT1_PCI #define MC13783_IRQMASK1_WARMM MC13783_IRQSTAT1_WARMI #define MC13783_IRQMASK1_MEMHLDM MC13783_IRQSTAT1_MEMHLDI #define MC13783_IRQMASK1_PWRRDYM MC13783_IRQSTAT1_PWRRDYI #define MC13783_IRQMASK1_THWARNLM MC13783_IRQSTAT1_THWARNLI #define MC13783_IRQMASK1_THWARNHM MC13783_IRQSTAT1_THWARNHI #define MC13783_IRQMASK1_CLKM MC13783_IRQSTAT1_CLKI #define MC13783_IRQMASK1_SEMAFM MC13783_IRQSTAT1_SEMAFI #define MC13783_IRQMASK1_MC2BM MC13783_IRQSTAT1_MC2BI #define MC13783_IRQMASK1_HSDETM MC13783_IRQSTAT1_HSDETI #define MC13783_IRQMASK1_HSLM MC13783_IRQSTAT1_HSLI #define MC13783_IRQMASK1_ALSPTHM MC13783_IRQSTAT1_ALSPTHI #define MC13783_IRQMASK1_AHSSHORTM MC13783_IRQSTAT1_AHSSHORTI #define MC13783_ADC1 44 #define MC13783_ADC1_ADEN (1 << 0) #define MC13783_ADC1_RAND (1 << 1) #define MC13783_ADC1_ADSEL (1 << 3) #define MC13783_ADC1_ASC (1 << 20) #define MC13783_ADC1_ADTRIGIGN (1 << 21) #define MC13783_NUMREGS 0x3f void mc13783_lock(struct mc13783 *mc13783) { if (!mutex_trylock(&mc13783->lock)) { dev_dbg(&mc13783->spidev->dev, "wait for %s from %pf\n", __func__, __builtin_return_address(0)); mutex_lock(&mc13783->lock); } dev_dbg(&mc13783->spidev->dev, "%s from %pf\n", __func__, __builtin_return_address(0)); } EXPORT_SYMBOL(mc13783_lock); void mc13783_unlock(struct mc13783 *mc13783) { dev_dbg(&mc13783->spidev->dev, "%s from %pf\n", __func__, __builtin_return_address(0)); mutex_unlock(&mc13783->lock); } EXPORT_SYMBOL(mc13783_unlock); #define MC13783_REGOFFSET_SHIFT 25 int mc13783_reg_read(struct mc13783 *mc13783, unsigned int offset, u32 *val) { struct spi_transfer t; struct spi_message m; int ret; BUG_ON(!mutex_is_locked(&mc13783->lock)); if (offset > MC13783_NUMREGS) return -EINVAL; *val = offset << MC13783_REGOFFSET_SHIFT; memset(&t, 0, sizeof(t)); t.tx_buf = val; t.rx_buf = val; t.len = sizeof(u32); spi_message_init(&m); spi_message_add_tail(&t, &m); ret = spi_sync(mc13783->spidev, &m); /* error in message.status implies error return from spi_sync */ BUG_ON(!ret && m.status); if (ret) return ret; *val &= 0xffffff; dev_vdbg(&mc13783->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val); return 0; } EXPORT_SYMBOL(mc13783_reg_read); int mc13783_reg_write(struct mc13783 *mc13783, unsigned int offset, u32 val) { u32 buf; struct spi_transfer t; struct spi_message m; int ret; BUG_ON(!mutex_is_locked(&mc13783->lock)); dev_vdbg(&mc13783->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val); if (offset > MC13783_NUMREGS || val > 0xffffff) return -EINVAL; buf = 1 << 31 | offset << MC13783_REGOFFSET_SHIFT | val; memset(&t, 0, sizeof(t)); t.tx_buf = &buf; t.rx_buf = &buf; t.len = sizeof(u32); spi_message_init(&m); spi_message_add_tail(&t, &m); ret = spi_sync(mc13783->spidev, &m); BUG_ON(!ret && m.status); if (ret) return ret; return 0; } EXPORT_SYMBOL(mc13783_reg_write); int mc13783_reg_rmw(struct mc13783 *mc13783, unsigned int offset, u32 mask, u32 val) { int ret; u32 valread; BUG_ON(val & ~mask); ret = mc13783_reg_read(mc13783, offset, &valread); if (ret) return ret; valread = (valread & ~mask) | val; return mc13783_reg_write(mc13783, offset, valread); } EXPORT_SYMBOL(mc13783_reg_rmw); int mc13783_get_flags(struct mc13783 *mc13783) { return mc13783->flags; } EXPORT_SYMBOL(mc13783_get_flags); int mc13783_irq_mask(struct mc13783 *mc13783, int irq) { int ret; unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1; u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); u32 mask; if (irq < 0 || irq >= MC13783_NUM_IRQ) return -EINVAL; ret = mc13783_reg_read(mc13783, offmask, &mask); if (ret) return ret; if (mask & irqbit) /* already masked */ return 0; return mc13783_reg_write(mc13783, offmask, mask | irqbit); } EXPORT_SYMBOL(mc13783_irq_mask); int mc13783_irq_unmask(struct mc13783 *mc13783, int irq) { int ret; unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1; u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); u32 mask; if (irq < 0 || irq >= MC13783_NUM_IRQ) return -EINVAL; ret = mc13783_reg_read(mc13783, offmask, &mask); if (ret) return ret; if (!(mask & irqbit)) /* already unmasked */ return 0; return mc13783_reg_write(mc13783, offmask, mask & ~irqbit); } EXPORT_SYMBOL(mc13783_irq_unmask); int mc13783_irq_status(struct mc13783 *mc13783, int irq, int *enabled, int *pending) { int ret; unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1; unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1; u32 irqbit = 1 << (irq < 24 ? irq : irq - 24); if (irq < 0 || irq >= MC13783_NUM_IRQ) return -EINVAL; if (enabled) { u32 mask; ret = mc13783_reg_read(mc13783, offmask, &mask); if (ret) return ret; *enabled = mask & irqbit; } if (pending) { u32 stat; ret = mc13783_reg_read(mc13783, offstat, &stat); if (ret) return ret; *pending = stat & irqbit; } return 0; } EXPORT_SYMBOL(mc13783_irq_status); int mc13783_irq_ack(struct mc13783 *mc13783, int irq) { unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1; unsigned int val = 1 << (irq < 24 ? irq : irq - 24); BUG_ON(irq < 0 || irq >= MC13783_NUM_IRQ); return mc13783_reg_write(mc13783, offstat, val); } EXPORT_SYMBOL(mc13783_irq_ack); 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; mc13783->irqhandler[irq] = handler; mc13783->irqdata[irq] = dev; return 0; } EXPORT_SYMBOL(mc13783_irq_request_nounmask); int mc13783_irq_request(struct mc13783 *mc13783, int irq, irq_handler_t handler, const char *name, void *dev) { int ret; ret = mc13783_irq_request_nounmask(mc13783, irq, handler, name, dev); if (ret) return ret; ret = mc13783_irq_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; ret = mc13783_irq_mask(mc13783, irq); if (ret) return ret; mc13783->irqhandler[irq] = NULL; mc13783->irqdata[irq] = NULL; return 0; } EXPORT_SYMBOL(mc13783_irq_free); static inline irqreturn_t mc13783_irqhandler(struct mc13783 *mc13783, int irq) { return mc13783->irqhandler[irq](irq, mc13783->irqdata[irq]); } /* * 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_irq_ack(adcdone_data->mc13783, irq); complete_all(&adcdone_data->done); return IRQ_HANDLED; } #define MC13783_ADC_WORKING (1 << 16) int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode, unsigned int channel, unsigned int *sample) { u32 adc0, adc1, old_adc0; int i, ret; struct mc13783_adcdone_data adcdone_data = { .mc13783 = mc13783, }; init_completion(&adcdone_data.done); dev_dbg(&mc13783->spidev->dev, "%s\n", __func__); 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; if (channel > 7) adc1 |= MC13783_ADC1_ADSEL; switch (mode) { case MC13783_ADC_MODE_TS: adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_TSMOD0 | MC13783_ADC0_TSMOD1; adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT; break; case MC13783_ADC_MODE_SINGLE_CHAN: 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: adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK; adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT; break; default: mc13783_unlock(mc13783); return -EINVAL; } dev_dbg(&mc13783->spidev->dev, "%s: request irq\n", __func__); mc13783_irq_request(mc13783, MC13783_IRQ_ADCDONE, mc13783_handler_adcdone, __func__, &adcdone_data); mc13783_irq_ack(mc13783, MC13783_IRQ_ADCDONE); mc13783_reg_write(mc13783, MC13783_REG_ADC_0, adc0); mc13783_reg_write(mc13783, MC13783_REG_ADC_1, adc1); mc13783_unlock(mc13783); ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ); if (!ret) ret = -ETIMEDOUT; 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); static int mc13783_add_subdevice_pdata(struct mc13783 *mc13783, const char *name, void *pdata, size_t pdata_size) { 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); } static int mc13783_check_revision(struct mc13783 *mc13783) { u32 rev_id, rev1, rev2, finid, icid; mc13783_reg_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->spidev->dev, "No MC13783 detected.\n"); return -ENODEV; } dev_info(&mc13783->spidev->dev, "MC13783 Rev %d.%d FinVer %x detected\n", rev1, rev2, finid); return 0; } static int mc13783_probe(struct spi_device *spi) { struct mc13783 *mc13783; struct mc13783_platform_data *pdata = dev_get_platdata(&spi->dev); int ret; mc13783 = kzalloc(sizeof(*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->spidev = spi; 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) */ mc13783_unlock(mc13783); 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)); } if (pdata->flags & MC13783_USE_RTC) mc13783_add_subdevice(mc13783, "mc13783-rtc"); if (pdata->flags & MC13783_USE_TOUCHSCREEN) mc13783_add_subdevice(mc13783, "mc13783-ts"); if (pdata->flags & MC13783_USE_LED) mc13783_add_subdevice_pdata(mc13783, "mc13783-led", pdata->leds, sizeof(*pdata->leds)); return 0; } static int __devexit mc13783_remove(struct spi_device *spi) { struct mc13783 *mc13783 = dev_get_drvdata(&spi->dev); free_irq(mc13783->spidev->irq, mc13783); mfd_remove_devices(&spi->dev); return 0; } static struct spi_driver mc13783_driver = { .driver = { .name = "mc13783", .bus = &spi_bus_type, .owner = THIS_MODULE, }, .probe = mc13783_probe, .remove = __devexit_p(mc13783_remove), }; static int __init mc13783_init(void) { return spi_register_driver(&mc13783_driver); } subsys_initcall(mc13783_init); static void __exit mc13783_exit(void) { spi_unregister_driver(&mc13783_driver); } module_exit(mc13783_exit); MODULE_DESCRIPTION("Core driver for Freescale MC13783 PMIC"); MODULE_AUTHOR("Uwe Kleine-Koenig "); MODULE_LICENSE("GPL v2");