1 files changed, 348 insertions, 0 deletions
diff --git a/drivers/mxc/pmic/core/pmic_core_i2c.c b/drivers/mxc/pmic/core/pmic_core_i2c.c
new file mode 100644
index 000000000000..8dfec5ad4976
--- /dev/null
+++ b/drivers/mxc/pmic/core/pmic_core_i2c.c
@@ -0,0 +1,348 @@
+/*
+ * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ * @file pmic_core_i2c.c
+ * @brief This is the main file for the PMIC Core/Protocol driver. i2c
+ * should be providing the interface between the PMIC and the MCU.
+ *
+ * @ingroup PMIC_CORE
+ */
+
+/*
+ * Includes
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/i2c.h>
+#include <linux/mfd/mc13892/core.h>
+#include <linux/pmic_external.h>
+#include <linux/pmic_status.h>
+#include <linux/uaccess.h>
+#include <mach/hardware.h>
+
+#include "pmic.h"
+
+#define MC13892_GENERATION_ID_LSH	6
+#define MC13892_IC_ID_LSH		13
+
+#define MC13892_GENERATION_ID_WID	3
+#define MC13892_IC_ID_WID		6
+
+#define MC13892_GEN_ID_VALUE	0x7
+#define MC13892_IC_ID_VALUE		1
+
+/*
+ * Global variables
+ */
+struct i2c_client *mc13892_client;
+
+extern pmic_version_t mxc_pmic_version;
+extern irqreturn_t pmic_irq_handler(int irq, void *dev_id);
+/*
+ * Platform device structure for PMIC client drivers
+ */
+static struct platform_device adc_ldm = {
+	.name = "pmic_adc",
+	.id = 1,
+};
+static struct platform_device battery_ldm = {
+	.name = "pmic_battery",
+	.id = 1,
+};
+static struct platform_device power_ldm = {
+	.name = "pmic_power",
+	.id = 1,
+};
+static struct platform_device rtc_ldm = {
+	.name = "pmic_rtc",
+	.id = 1,
+};
+static struct platform_device light_ldm = {
+	.name = "pmic_light",
+	.id = 1,
+};
+static struct platform_device rleds_ldm = {
+	.name = "pmic_leds",
+	.id = 'r',
+};
+static struct platform_device gleds_ldm = {
+	.name = "pmic_leds",
+	.id = 'g',
+};
+static struct platform_device bleds_ldm = {
+	.name = "pmic_leds",
+	.id = 'b',
+};
+
+static void pmic_pdev_register(struct device *dev)
+{
+	platform_device_register(&adc_ldm);
+
+	if (!cpu_is_mx53())
+		platform_device_register(&battery_ldm);
+
+	platform_device_register(&rtc_ldm);
+	platform_device_register(&power_ldm);
+	platform_device_register(&light_ldm);
+	platform_device_register(&rleds_ldm);
+	platform_device_register(&gleds_ldm);
+	platform_device_register(&bleds_ldm);
+}
+
+/*!
+ * This function unregisters platform device structures for
+ * PMIC client drivers.
+ */
+static void pmic_pdev_unregister(void)
+{
+	platform_device_unregister(&adc_ldm);
+	platform_device_unregister(&battery_ldm);
+	platform_device_unregister(&rtc_ldm);
+	platform_device_unregister(&power_ldm);
+	platform_device_unregister(&light_ldm);
+}
+
+static int __devinit is_chip_onboard(struct i2c_client *client)
+{
+	unsigned int ret = 0;
+
+	/*bind the right device to the driver */
+	if (pmic_i2c_24bit_read(client, REG_IDENTIFICATION, &ret) == -1)
+		return -1;
+
+	if (MC13892_GEN_ID_VALUE != BITFEXT(ret, MC13892_GENERATION_ID)) {
+		/*compare the address value */
+		dev_err(&client->dev,
+			"read generation ID 0x%x is not equal to 0x%x!\n",
+			BITFEXT(ret, MC13892_GENERATION_ID),
+			MC13892_GEN_ID_VALUE);
+		return -1;
+	}
+
+	return 0;
+}
+
+static ssize_t mc13892_show(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	int i, value;
+	int offset = (REG_TEST4 + 1) / 4;
+
+	for (i = 0; i < offset; i++) {
+		pmic_read(i, &value);
+		pr_info("reg%02d: %06x\t\t", i, value);
+		pmic_read(i + offset, &value);
+		pr_info("reg%02d: %06x\t\t", i + offset, value);
+		pmic_read(i + offset * 2, &value);
+		pr_info("reg%02d: %06x\t\t", i + offset * 2, value);
+		pmic_read(i + offset * 3, &value);
+		pr_info("reg%02d: %06x\n", i + offset * 3, value);
+	}
+
+	return 0;
+}
+
+static ssize_t mc13892_store(struct device *dev,
+			     struct device_attribute *attr, const char *buf,
+			     size_t count)
+{
+	int reg, value, ret;
+	char *p;
+
+	reg = simple_strtoul(buf, NULL, 10);
+
+	p = NULL;
+	p = memchr(buf, ' ', count);
+
+	if (p == NULL) {
+		pmic_read(reg, &value);
+		pr_debug("reg%02d: %06x\n", reg, value);
+		return count;
+	}
+
+	p += 1;
+
+	value = simple_strtoul(p, NULL, 16);
+
+	ret = pmic_write(reg, value);
+	if (ret == 0)
+		pr_debug("write reg%02d: %06x\n", reg, value);
+	else
+		pr_debug("register update failed\n");
+
+	return count;
+}
+
+static struct device_attribute mc13892_dev_attr = {
+	.attr = {
+		 .name = "mc13892_ctl",
+		 .mode = S_IRUSR | S_IWUSR,
+		 },
+	.show = mc13892_show,
+	.store = mc13892_store,
+};
+
+static int __devinit pmic_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	int ret = 0;
+	int pmic_irq;
+	struct mc13892 *mc13892;
+	struct mc13892_platform_data *plat_data = client->dev.platform_data;
+
+	ret = is_chip_onboard(client);
+	if (ret == -1)
+		return -ENODEV;
+
+	mc13892 = kzalloc(sizeof(struct mc13892), GFP_KERNEL);
+	if (mc13892 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, mc13892);
+	mc13892->dev = &client->dev;
+	mc13892->i2c_client = client;
+
+	/* so far, we got matched chip on board */
+
+	mc13892_client = client;
+
+	/* Initialize the PMIC event handling */
+	pmic_event_list_init();
+
+	/* Initialize GPIO for PMIC Interrupt */
+	gpio_pmic_active();
+
+	/* Get the PMIC Version */
+	pmic_get_revision(&mxc_pmic_version);
+	if (mxc_pmic_version.revision < 0) {
+		dev_err((struct device *)client,
+			"PMIC not detected!!! Access Failed\n");
+		return -ENODEV;
+	} else {
+		dev_dbg((struct device *)client,
+			"Detected pmic core IC version number is %d\n",
+			mxc_pmic_version.revision);
+	}
+
+	/* Initialize the PMIC parameters */
+	ret = pmic_init_registers();
+	if (ret != PMIC_SUCCESS)
+		return PMIC_ERROR;
+
+	pmic_irq = (int)(client->irq);
+	if (pmic_irq == 0)
+		return PMIC_ERROR;
+
+	ret = pmic_start_event_thread(pmic_irq);
+	if (ret) {
+		pr_err("mc13892 pmic driver init: \
+			fail to start event thread\n");
+		return PMIC_ERROR;
+	}
+
+	/* Set and install PMIC IRQ handler */
+
+	set_irq_type(pmic_irq, IRQF_TRIGGER_HIGH);
+
+	ret =
+	    request_irq(pmic_irq, pmic_irq_handler, 0, "PMIC_IRQ",
+			0);
+
+	if (ret) {
+		dev_err(&client->dev, "request irq %d error!\n", pmic_irq);
+		return ret;
+	}
+	enable_irq_wake(pmic_irq);
+
+	if (plat_data && plat_data->init) {
+		ret = plat_data->init(mc13892);
+		if (ret != 0)
+			return PMIC_ERROR;
+	}
+
+	ret = device_create_file(&client->dev, &mc13892_dev_attr);
+	if (ret)
+		dev_err(&client->dev, "create device file failed!\n");
+
+	pmic_pdev_register(&client->dev);
+
+	dev_info(&client->dev, "Loaded\n");
+
+	return PMIC_SUCCESS;
+}
+
+static int pmic_remove(struct i2c_client *client)
+{
+	int pmic_irq = (int)(client->irq);
+
+	pmic_stop_event_thread();
+	free_irq(pmic_irq, 0);
+	pmic_pdev_unregister();
+	return 0;
+}
+
+static int pmic_suspend(struct i2c_client *client, pm_message_t state)
+{
+	return 0;
+}
+
+static int pmic_resume(struct i2c_client *client)
+{
+	return 0;
+}
+
+static const struct i2c_device_id mc13892_id[] = {
+	{"mc13892", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(i2c, mc13892_id);
+
+static struct i2c_driver pmic_driver = {
+	.driver = {
+		   .name = "mc13892",
+		   .bus = NULL,
+		   },
+	.probe = pmic_probe,
+	.remove = pmic_remove,
+	.suspend = pmic_suspend,
+	.resume = pmic_resume,
+	.id_table = mc13892_id,
+};
+
+static int __init pmic_init(void)
+{
+	return i2c_add_driver(&pmic_driver);
+}
+
+static void __exit pmic_exit(void)
+{
+	i2c_del_driver(&pmic_driver);
+}
+
+/*
+ * Module entry points
+ */
+subsys_initcall_sync(pmic_init);
+module_exit(pmic_exit);
+
+MODULE_DESCRIPTION("Core/Protocol driver for PMIC");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_LICENSE("GPL");