--- /dev/null
+/*
+ * Copyright 2009-2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
+ *
+ * loosely based on an earlier driver that has
+ * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * 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 <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+
+#include "mc13xxx.h"
+
+#define MC13XXX_IRQSTAT0 0
+#define MC13XXX_IRQMASK0 1
+#define MC13XXX_IRQSTAT1 3
+#define MC13XXX_IRQMASK1 4
+
+#define MC13XXX_REVISION 7
+#define MC13XXX_REVISION_REVMETAL (0x07 << 0)
+#define MC13XXX_REVISION_REVFULL (0x03 << 3)
+#define MC13XXX_REVISION_ICID (0x07 << 6)
+#define MC13XXX_REVISION_FIN (0x03 << 9)
+#define MC13XXX_REVISION_FAB (0x03 << 11)
+#define MC13XXX_REVISION_ICIDCODE (0x3f << 13)
+
+#define MC34708_REVISION_REVMETAL (0x07 << 0)
+#define MC34708_REVISION_REVFULL (0x07 << 3)
+#define MC34708_REVISION_FIN (0x07 << 6)
+#define MC34708_REVISION_FAB (0x07 << 9)
+
+#define MC13XXX_PWRCTRL 15
+#define MC13XXX_PWRCTRL_WDIRESET (1 << 12)
+
+#define MC13XXX_ADC1 44
+#define MC13XXX_ADC1_ADEN (1 << 0)
+#define MC13XXX_ADC1_RAND (1 << 1)
+#define MC13XXX_ADC1_ADSEL (1 << 3)
+#define MC13XXX_ADC1_ASC (1 << 20)
+#define MC13XXX_ADC1_ADTRIGIGN (1 << 21)
+
+#define MC13XXX_ADC2 45
+
+void mc13xxx_lock(struct mc13xxx *mc13xxx)
+{
+ if (!mutex_trylock(&mc13xxx->lock)) {
+ dev_dbg(mc13xxx->dev, "wait for %s from %ps\n",
+ __func__, __builtin_return_address(0));
+
+ mutex_lock(&mc13xxx->lock);
+ }
+ dev_dbg(mc13xxx->dev, "%s from %ps\n",
+ __func__, __builtin_return_address(0));
+}
+EXPORT_SYMBOL(mc13xxx_lock);
+
+void mc13xxx_unlock(struct mc13xxx *mc13xxx)
+{
+ dev_dbg(mc13xxx->dev, "%s from %ps\n",
+ __func__, __builtin_return_address(0));
+ mutex_unlock(&mc13xxx->lock);
+}
+EXPORT_SYMBOL(mc13xxx_unlock);
+
+int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
+{
+ int ret;
+
+ ret = regmap_read(mc13xxx->regmap, offset, val);
+ dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
+
+ return ret;
+}
+EXPORT_SYMBOL(mc13xxx_reg_read);
+
+int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
+{
+ dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
+
+ if (val >= BIT(24))
+ return -EINVAL;
+
+ return regmap_write(mc13xxx->regmap, offset, val);
+}
+EXPORT_SYMBOL(mc13xxx_reg_write);
+
+int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
+ u32 mask, u32 val)
+{
+ BUG_ON(val & ~mask);
+ dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n",
+ offset, val, mask);
+
+ return regmap_update_bits(mc13xxx->regmap, offset, mask, val);
+}
+EXPORT_SYMBOL(mc13xxx_reg_rmw);
+
+int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
+{
+ int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
+
+ disable_irq_nosync(virq);
+
+ return 0;
+}
+EXPORT_SYMBOL(mc13xxx_irq_mask);
+
+int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
+{
+ int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
+
+ enable_irq(virq);
+
+ return 0;
+}
+EXPORT_SYMBOL(mc13xxx_irq_unmask);
+
+int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
+ int *enabled, int *pending)
+{
+ int ret;
+ unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
+ unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
+ u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
+
+ if (irq < 0 || irq >= ARRAY_SIZE(mc13xxx->irqs))
+ return -EINVAL;
+
+ if (enabled) {
+ u32 mask;
+
+ ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
+ if (ret)
+ return ret;
+
+ *enabled = mask & irqbit;
+ }
+
+ if (pending) {
+ u32 stat;
+
+ ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
+ if (ret)
+ return ret;
+
+ *pending = stat & irqbit;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(mc13xxx_irq_status);
+
+int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
+ irq_handler_t handler, const char *name, void *dev)
+{
+ int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
+
+ return devm_request_threaded_irq(mc13xxx->dev, virq, NULL, handler,
+ 0, name, dev);
+}
+EXPORT_SYMBOL(mc13xxx_irq_request);
+
+int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
+{
+ int virq = regmap_irq_get_virq(mc13xxx->irq_data, irq);
+
+ devm_free_irq(mc13xxx->dev, virq, dev);
+
+ return 0;
+}
+EXPORT_SYMBOL(mc13xxx_irq_free);
+
+#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
+static void mc13xxx_print_revision(struct mc13xxx *mc13xxx, u32 revision)
+{
+ dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
+ "fin: %d, fab: %d, icid: %d/%d\n",
+ mc13xxx->variant->name,
+ maskval(revision, MC13XXX_REVISION_REVFULL),
+ maskval(revision, MC13XXX_REVISION_REVMETAL),
+ maskval(revision, MC13XXX_REVISION_FIN),
+ maskval(revision, MC13XXX_REVISION_FAB),
+ maskval(revision, MC13XXX_REVISION_ICID),
+ maskval(revision, MC13XXX_REVISION_ICIDCODE));
+}
+
+static void mc34708_print_revision(struct mc13xxx *mc13xxx, u32 revision)
+{
+ dev_info(mc13xxx->dev, "%s: rev %d.%d, fin: %d, fab: %d\n",
+ mc13xxx->variant->name,
+ maskval(revision, MC34708_REVISION_REVFULL),
+ maskval(revision, MC34708_REVISION_REVMETAL),
+ maskval(revision, MC34708_REVISION_FIN),
+ maskval(revision, MC34708_REVISION_FAB));
+}
+
+/* These are only exported for mc13xxx-i2c and mc13xxx-spi */
+struct mc13xxx_variant mc13xxx_variant_mc13783 = {
+ .name = "mc13783",
+ .print_revision = mc13xxx_print_revision,
+};
+EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13783);
+
+struct mc13xxx_variant mc13xxx_variant_mc13892 = {
+ .name = "mc13892",
+ .print_revision = mc13xxx_print_revision,
+};
+EXPORT_SYMBOL_GPL(mc13xxx_variant_mc13892);
+
+struct mc13xxx_variant mc13xxx_variant_mc34708 = {
+ .name = "mc34708",
+ .print_revision = mc34708_print_revision,
+};
+EXPORT_SYMBOL_GPL(mc13xxx_variant_mc34708);
+
+static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
+{
+ return mc13xxx->variant->name;
+}
+
+int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
+{
+ return mc13xxx->flags;
+}
+EXPORT_SYMBOL(mc13xxx_get_flags);
+
+#define MC13XXX_ADC1_CHAN0_SHIFT 5
+#define MC13XXX_ADC1_CHAN1_SHIFT 8
+#define MC13783_ADC1_ATO_SHIFT 11
+#define MC13783_ADC1_ATOX (1 << 19)
+
+struct mc13xxx_adcdone_data {
+ struct mc13xxx *mc13xxx;
+ struct completion done;
+};
+
+static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
+{
+ struct mc13xxx_adcdone_data *adcdone_data = data;
+
+ complete_all(&adcdone_data->done);
+
+ return IRQ_HANDLED;
+}
+
+#define MC13XXX_ADC_WORKING (1 << 0)
+
+int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
+ unsigned int channel, u8 ato, bool atox,
+ unsigned int *sample)
+{
+ u32 adc0, adc1, old_adc0;
+ int i, ret;
+ struct mc13xxx_adcdone_data adcdone_data = {
+ .mc13xxx = mc13xxx,
+ };
+ init_completion(&adcdone_data.done);
+
+ dev_dbg(mc13xxx->dev, "%s\n", __func__);
+
+ mc13xxx_lock(mc13xxx);
+
+ if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ mc13xxx->adcflags |= MC13XXX_ADC_WORKING;
+
+ mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);
+
+ adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2;
+ adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC;
+
+ if (channel > 7)
+ adc1 |= MC13XXX_ADC1_ADSEL;
+
+ switch (mode) {
+ case MC13XXX_ADC_MODE_TS:
+ adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 |
+ MC13XXX_ADC0_TSMOD1;
+ adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
+ break;
+
+ case MC13XXX_ADC_MODE_SINGLE_CHAN:
+ adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
+ adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT;
+ adc1 |= MC13XXX_ADC1_RAND;
+ break;
+
+ case MC13XXX_ADC_MODE_MULT_CHAN:
+ adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
+ adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
+ break;
+
+ default:
+ mc13xxx_unlock(mc13xxx);
+ return -EINVAL;
+ }
+
+ adc1 |= ato << MC13783_ADC1_ATO_SHIFT;
+ if (atox)
+ adc1 |= MC13783_ADC1_ATOX;
+
+ dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__);
+ mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
+ mc13xxx_handler_adcdone, __func__, &adcdone_data);
+
+ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
+ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);
+
+ mc13xxx_unlock(mc13xxx);
+
+ ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
+
+ if (!ret)
+ ret = -ETIMEDOUT;
+
+ mc13xxx_lock(mc13xxx);
+
+ mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data);
+
+ if (ret > 0)
+ for (i = 0; i < 4; ++i) {
+ ret = mc13xxx_reg_read(mc13xxx,
+ MC13XXX_ADC2, &sample[i]);
+ if (ret)
+ break;
+ }
+
+ if (mode == MC13XXX_ADC_MODE_TS)
+ /* restore TSMOD */
+ mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);
+
+ mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
+out:
+ mc13xxx_unlock(mc13xxx);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion);
+
+static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
+ const char *format, void *pdata, size_t pdata_size)
+{
+ char buf[30];
+ const char *name = mc13xxx_get_chipname(mc13xxx);
+
+ struct mfd_cell cell = {
+ .platform_data = pdata,
+ .pdata_size = pdata_size,
+ };
+
+ /* there is no asnprintf in the kernel :-( */
+ if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
+ return -E2BIG;
+
+ cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
+ if (!cell.name)
+ return -ENOMEM;
+
+ return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0,
+ regmap_irq_get_domain(mc13xxx->irq_data));
+}
+
+static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
+{
+ return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
+}
+
+#ifdef CONFIG_OF
+static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
+{
+ struct device_node *np = mc13xxx->dev->of_node;
+
+ if (!np)
+ return -ENODEV;
+
+ if (of_get_property(np, "fsl,mc13xxx-uses-adc", NULL))
+ mc13xxx->flags |= MC13XXX_USE_ADC;
+
+ if (of_get_property(np, "fsl,mc13xxx-uses-codec", NULL))
+ mc13xxx->flags |= MC13XXX_USE_CODEC;
+
+ if (of_get_property(np, "fsl,mc13xxx-uses-rtc", NULL))
+ mc13xxx->flags |= MC13XXX_USE_RTC;
+
+ if (of_get_property(np, "fsl,mc13xxx-uses-touch", NULL))
+ mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN;
+
+ return 0;
+}
+#else
+static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
+{
+ return -ENODEV;
+}
+#endif
+
+int mc13xxx_common_init(struct device *dev)
+{
+ struct mc13xxx_platform_data *pdata = dev_get_platdata(dev);
+ struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
+ u32 revision;
+ int i, ret;
+
+ mc13xxx->dev = dev;
+
+ ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
+ if (ret)
+ return ret;
+
+ mc13xxx->variant->print_revision(mc13xxx, revision);
+
+ ret = mc13xxx_reg_rmw(mc13xxx, MC13XXX_PWRCTRL,
+ MC13XXX_PWRCTRL_WDIRESET, MC13XXX_PWRCTRL_WDIRESET);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(mc13xxx->irqs); i++) {
+ mc13xxx->irqs[i].reg_offset = i / MC13XXX_IRQ_PER_REG;
+ mc13xxx->irqs[i].mask = BIT(i % MC13XXX_IRQ_PER_REG);
+ }
+
+ mc13xxx->irq_chip.name = dev_name(dev);
+ mc13xxx->irq_chip.status_base = MC13XXX_IRQSTAT0;
+ mc13xxx->irq_chip.mask_base = MC13XXX_IRQMASK0;
+ mc13xxx->irq_chip.ack_base = MC13XXX_IRQSTAT0;
+ mc13xxx->irq_chip.irq_reg_stride = MC13XXX_IRQSTAT1 - MC13XXX_IRQSTAT0;
+ mc13xxx->irq_chip.init_ack_masked = true;
+ mc13xxx->irq_chip.use_ack = true;
+ mc13xxx->irq_chip.num_regs = MC13XXX_IRQ_REG_CNT;
+ mc13xxx->irq_chip.irqs = mc13xxx->irqs;
+ mc13xxx->irq_chip.num_irqs = ARRAY_SIZE(mc13xxx->irqs);
+
+ ret = regmap_add_irq_chip(mc13xxx->regmap, mc13xxx->irq, IRQF_ONESHOT,
+ 0, &mc13xxx->irq_chip, &mc13xxx->irq_data);
+ if (ret)
+ return ret;
+
+ mutex_init(&mc13xxx->lock);
+
+ if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
+ mc13xxx->flags = pdata->flags;
+
+ if (pdata) {
+ mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
+ &pdata->regulators, sizeof(pdata->regulators));
+ mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
+ pdata->leds, sizeof(*pdata->leds));
+ mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
+ pdata->buttons, sizeof(*pdata->buttons));
+ if (mc13xxx->flags & MC13XXX_USE_CODEC)
+ mc13xxx_add_subdevice_pdata(mc13xxx, "%s-codec",
+ pdata->codec, sizeof(*pdata->codec));
+ if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
+ mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts",
+ &pdata->touch, sizeof(pdata->touch));
+ } else {
+ mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
+ mc13xxx_add_subdevice(mc13xxx, "%s-led");
+ mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
+ if (mc13xxx->flags & MC13XXX_USE_CODEC)
+ mc13xxx_add_subdevice(mc13xxx, "%s-codec");
+ if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
+ mc13xxx_add_subdevice(mc13xxx, "%s-ts");
+ }
+
+ if (mc13xxx->flags & MC13XXX_USE_ADC)
+ mc13xxx_add_subdevice(mc13xxx, "%s-adc");
+
+ if (mc13xxx->flags & MC13XXX_USE_RTC)
+ mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mc13xxx_common_init);
+
+int mc13xxx_common_exit(struct device *dev)
+{
+ struct mc13xxx *mc13xxx = dev_get_drvdata(dev);
+
+ mfd_remove_devices(dev);
+ regmap_del_irq_chip(mc13xxx->irq, mc13xxx->irq_data);
+ mutex_destroy(&mc13xxx->lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mc13xxx_common_exit);
+
+MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
+MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff