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1 /*
2  * da9063-core.c: Device access for Dialog DA9063 modules
3  *
4  * Copyright 2012 Dialog Semiconductors Ltd.
5  * Copyright 2013 Philipp Zabel, Pengutronix
6  *
7  * Author: Krystian Garbaciak, Dialog Semiconductor
8  * Author: Michal Hajduk, Dialog Semiconductor
9  *
10  *  This program is free software; you can redistribute  it and/or modify it
11  *  under  the terms of  the GNU General  Public License as published by the
12  *  Free Software Foundation;  either version 2 of the  License, or (at your
13  *  option) any later version.
14  *
15  */
16 
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <linux/device.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/mutex.h>
25 #include <linux/mfd/core.h>
26 #include <linux/regmap.h>
27 
28 #include <linux/mfd/da9063/core.h>
29 #include <linux/mfd/da9063/pdata.h>
30 #include <linux/mfd/da9063/registers.h>
31 
32 #include <linux/proc_fs.h>
33 #include <linux/kthread.h>
34 #include <linux/uaccess.h>
35 
36 
37 static struct resource da9063_regulators_resources[] = {
38 	{
39 		.name	= "LDO_LIM",
40 		.start	= DA9063_IRQ_LDO_LIM,
41 		.end	= DA9063_IRQ_LDO_LIM,
42 		.flags	= IORESOURCE_IRQ,
43 	},
44 };
45 
46 static struct resource da9063_rtc_resources[] = {
47 	{
48 		.name	= "ALARM",
49 		.start	= DA9063_IRQ_ALARM,
50 		.end	= DA9063_IRQ_ALARM,
51 		.flags	= IORESOURCE_IRQ,
52 	},
53 	{
54 		.name	= "TICK",
55 		.start	= DA9063_IRQ_TICK,
56 		.end	= DA9063_IRQ_TICK,
57 		.flags	= IORESOURCE_IRQ,
58 	}
59 };
60 
61 static struct resource da9063_onkey_resources[] = {
62 	{
63 		.name	= "ONKEY",
64 		.start	= DA9063_IRQ_ONKEY,
65 		.end	= DA9063_IRQ_ONKEY,
66 		.flags	= IORESOURCE_IRQ,
67 	},
68 };
69 
70 static struct resource da9063_hwmon_resources[] = {
71 	{
72 		.start	= DA9063_IRQ_ADC_RDY,
73 		.end	= DA9063_IRQ_ADC_RDY,
74 		.flags	= IORESOURCE_IRQ,
75 	},
76 };
77 
78 
79 static const struct mfd_cell da9063_devs[] = {
80 	{
81 		.name		= DA9063_DRVNAME_REGULATORS,
82 		.num_resources	= ARRAY_SIZE(da9063_regulators_resources),
83 		.resources	= da9063_regulators_resources,
84 	},
85 	{
86 		.name		= DA9063_DRVNAME_LEDS,
87 	},
88 	{
89 		.name		= DA9063_DRVNAME_WATCHDOG,
90 		.of_compatible	= "dlg,da9063-watchdog",
91 	},
92 	{
93 		.name		= DA9063_DRVNAME_HWMON,
94 		.num_resources	= ARRAY_SIZE(da9063_hwmon_resources),
95 		.resources	= da9063_hwmon_resources,
96 	},
97 	{
98 		.name		= DA9063_DRVNAME_ONKEY,
99 		.num_resources	= ARRAY_SIZE(da9063_onkey_resources),
100 		.resources	= da9063_onkey_resources,
101 		.of_compatible = "dlg,da9063-onkey",
102 	},
103 	{
104 		.name		= DA9063_DRVNAME_RTC,
105 		.num_resources	= ARRAY_SIZE(da9063_rtc_resources),
106 		.resources	= da9063_rtc_resources,
107 		.of_compatible	= "dlg,da9063-rtc",
108 	},
109 	{
110 		.name		= DA9063_DRVNAME_VIBRATION,
111 	},
112 };
113 
da9063_clear_fault_log(struct da9063 * da9063)114 static int da9063_clear_fault_log(struct da9063 *da9063)
115 {
116 	int ret = 0;
117 	int fault_log = 0;
118 
119 	ret = regmap_read(da9063->regmap, DA9063_REG_FAULT_LOG, &fault_log);
120 	if (ret < 0) {
121 		dev_err(da9063->dev, "Cannot read FAULT_LOG.\n");
122 		return -EIO;
123 	}
124 
125 	if (fault_log) {
126 		if (fault_log & DA9063_TWD_ERROR)
127 			dev_dbg(da9063->dev,
128 				"Fault log entry detected: DA9063_TWD_ERROR\n");
129 		if (fault_log & DA9063_POR)
130 			dev_dbg(da9063->dev,
131 				"Fault log entry detected: DA9063_POR\n");
132 		if (fault_log & DA9063_VDD_FAULT)
133 			dev_dbg(da9063->dev,
134 				"Fault log entry detected: DA9063_VDD_FAULT\n");
135 		if (fault_log & DA9063_VDD_START)
136 			dev_dbg(da9063->dev,
137 				"Fault log entry detected: DA9063_VDD_START\n");
138 		if (fault_log & DA9063_TEMP_CRIT)
139 			dev_dbg(da9063->dev,
140 				"Fault log entry detected: DA9063_TEMP_CRIT\n");
141 		if (fault_log & DA9063_KEY_RESET)
142 			dev_dbg(da9063->dev,
143 				"Fault log entry detected: DA9063_KEY_RESET\n");
144 		if (fault_log & DA9063_NSHUTDOWN)
145 			dev_dbg(da9063->dev,
146 				"Fault log entry detected: DA9063_NSHUTDOWN\n");
147 		if (fault_log & DA9063_WAIT_SHUT)
148 			dev_dbg(da9063->dev,
149 				"Fault log entry detected: DA9063_WAIT_SHUT\n");
150 	}
151 
152 	ret = regmap_write(da9063->regmap,
153 			   DA9063_REG_FAULT_LOG,
154 			   fault_log);
155 	if (ret < 0)
156 		dev_err(da9063->dev,
157 			"Cannot reset FAULT_LOG values %d\n", ret);
158 
159 	return ret;
160 }
161 
da9063_device_init(struct da9063 * da9063,unsigned int irq)162 int da9063_device_init(struct da9063 *da9063, unsigned int irq)
163 {
164 	struct da9063_pdata *pdata = da9063->dev->platform_data;
165 	int model, variant_id, variant_code;
166 	int ret;
167 
168 	ret = da9063_clear_fault_log(da9063);
169 	if (ret < 0)
170 		dev_err(da9063->dev, "Cannot clear fault log\n");
171 
172 	if (pdata) {
173 		da9063->flags = pdata->flags;
174 		da9063->irq_base = pdata->irq_base;
175 	} else {
176 		da9063->flags = 0;
177 		da9063->irq_base = -1;
178 	}
179 	da9063->chip_irq = irq;
180 
181 	if (pdata && pdata->init != NULL) {
182 		ret = pdata->init(da9063);
183 		if (ret != 0) {
184 			dev_err(da9063->dev,
185 				"Platform initialization failed.\n");
186 			return ret;
187 		}
188 	}
189 
190 	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_ID, &model);
191 	if (ret < 0) {
192 		dev_err(da9063->dev, "Cannot read chip model id.\n");
193 		return -EIO;
194 	}
195 	if (model != PMIC_DA9063) {
196 		dev_err(da9063->dev, "Invalid chip model id: 0x%02x\n", model);
197 		return -ENODEV;
198 	}
199 
200 	ret = regmap_read(da9063->regmap, DA9063_REG_CHIP_VARIANT, &variant_id);
201 	if (ret < 0) {
202 		dev_err(da9063->dev, "Cannot read chip variant id.\n");
203 		return -EIO;
204 	}
205 
206 	variant_code = variant_id >> DA9063_CHIP_VARIANT_SHIFT;
207 
208 	dev_info(da9063->dev,
209 		 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
210 		 model, variant_id);
211 
212 	if (variant_code < PMIC_DA9063_BB && variant_code != PMIC_DA9063_AD) {
213 		dev_err(da9063->dev,
214 			"Cannot support variant code: 0x%02X\n", variant_code);
215 		return -ENODEV;
216 	}
217 
218 	da9063->model = model;
219 	da9063->variant_code = variant_code;
220 
221 	ret = da9063_irq_init(da9063);
222 	if (ret) {
223 		dev_err(da9063->dev, "Cannot initialize interrupts.\n");
224 		return ret;
225 	}
226 
227 	da9063->irq_base = regmap_irq_chip_get_base(da9063->regmap_irq);
228 
229 	ret = mfd_add_devices(da9063->dev, -1, da9063_devs,
230 			      ARRAY_SIZE(da9063_devs), NULL, da9063->irq_base,
231 			      NULL);
232 	if (ret)
233 		dev_err(da9063->dev, "Cannot add MFD cells\n");
234 
235 	return ret;
236 }
237 
da9063_device_exit(struct da9063 * da9063)238 void da9063_device_exit(struct da9063 *da9063)
239 {
240 	mfd_remove_devices(da9063->dev);
241 	da9063_irq_exit(da9063);
242 }
243 
244 MODULE_DESCRIPTION("PMIC driver for Dialog DA9063");
245 MODULE_AUTHOR("Krystian Garbaciak");
246 MODULE_AUTHOR("Michal Hajduk");
247 MODULE_LICENSE("GPL");
248