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7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/acpi.h>
10#include <linux/platform_device.h>
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26
27#define DPTF_POWER_SHOW(name, object) \
28static ssize_t name##_show(struct device *dev,\
29 struct device_attribute *attr,\
30 char *buf)\
31{\
32 struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
33 unsigned long long val;\
34 acpi_status status;\
35\
36 status = acpi_evaluate_integer(acpi_dev->handle, #object,\
37 NULL, &val);\
38 if (ACPI_SUCCESS(status))\
39 return sprintf(buf, "%d\n", (int)val);\
40 else \
41 return -EINVAL;\
42}
43
44DPTF_POWER_SHOW(max_platform_power_mw, PMAX)
45DPTF_POWER_SHOW(platform_power_source, PSRC)
46DPTF_POWER_SHOW(adapter_rating_mw, ARTG)
47DPTF_POWER_SHOW(battery_steady_power_mw, PBSS)
48DPTF_POWER_SHOW(charger_type, CTYP)
49DPTF_POWER_SHOW(rest_of_platform_power_mw, PROP)
50DPTF_POWER_SHOW(max_steady_state_power_mw, PBSS)
51DPTF_POWER_SHOW(high_freq_impedance_mohm, RBHF)
52DPTF_POWER_SHOW(no_load_voltage_mv, VBNL)
53DPTF_POWER_SHOW(current_discharge_capbility_ma, CMPP);
54
55static DEVICE_ATTR_RO(max_platform_power_mw);
56static DEVICE_ATTR_RO(platform_power_source);
57static DEVICE_ATTR_RO(adapter_rating_mw);
58static DEVICE_ATTR_RO(battery_steady_power_mw);
59static DEVICE_ATTR_RO(charger_type);
60static DEVICE_ATTR_RO(rest_of_platform_power_mw);
61static DEVICE_ATTR_RO(max_steady_state_power_mw);
62static DEVICE_ATTR_RO(high_freq_impedance_mohm);
63static DEVICE_ATTR_RO(no_load_voltage_mv);
64static DEVICE_ATTR_RO(current_discharge_capbility_ma);
65
66static ssize_t prochot_confirm_store(struct device *dev,
67 struct device_attribute *attr,
68 const char *buf, size_t count)
69{
70 struct acpi_device *acpi_dev = dev_get_drvdata(dev);
71 acpi_status status;
72 int seq_no;
73
74 if (kstrtouint(buf, 0, &seq_no) < 0)
75 return -EINVAL;
76
77 status = acpi_execute_simple_method(acpi_dev->handle, "PBOK", seq_no);
78 if (ACPI_SUCCESS(status))
79 return count;
80
81 return -EINVAL;
82}
83
84static DEVICE_ATTR_WO(prochot_confirm);
85
86static struct attribute *dptf_power_attrs[] = {
87 &dev_attr_max_platform_power_mw.attr,
88 &dev_attr_platform_power_source.attr,
89 &dev_attr_adapter_rating_mw.attr,
90 &dev_attr_battery_steady_power_mw.attr,
91 &dev_attr_charger_type.attr,
92 &dev_attr_rest_of_platform_power_mw.attr,
93 &dev_attr_prochot_confirm.attr,
94 NULL
95};
96
97static const struct attribute_group dptf_power_attribute_group = {
98 .attrs = dptf_power_attrs,
99 .name = "dptf_power"
100};
101
102static struct attribute *dptf_battery_attrs[] = {
103 &dev_attr_max_platform_power_mw.attr,
104 &dev_attr_max_steady_state_power_mw.attr,
105 &dev_attr_high_freq_impedance_mohm.attr,
106 &dev_attr_no_load_voltage_mv.attr,
107 &dev_attr_current_discharge_capbility_ma.attr,
108 NULL
109};
110
111static const struct attribute_group dptf_battery_attribute_group = {
112 .attrs = dptf_battery_attrs,
113 .name = "dptf_battery"
114};
115
116#define MAX_POWER_CHANGED 0x80
117#define POWER_STATE_CHANGED 0x81
118#define STEADY_STATE_POWER_CHANGED 0x83
119#define POWER_PROP_CHANGE_EVENT 0x84
120#define IMPEDANCED_CHNGED 0x85
121#define VOLTAGE_CURRENT_CHANGED 0x86
122
123static long long dptf_participant_type(acpi_handle handle)
124{
125 unsigned long long ptype;
126 acpi_status status;
127
128 status = acpi_evaluate_integer(handle, "PTYP", NULL, &ptype);
129 if (ACPI_FAILURE(status))
130 return -ENODEV;
131
132 return ptype;
133}
134
135static void dptf_power_notify(acpi_handle handle, u32 event, void *data)
136{
137 struct platform_device *pdev = data;
138 char *attr;
139
140 switch (event) {
141 case POWER_STATE_CHANGED:
142 attr = "platform_power_source";
143 break;
144 case POWER_PROP_CHANGE_EVENT:
145 attr = "rest_of_platform_power_mw";
146 break;
147 case MAX_POWER_CHANGED:
148 attr = "max_platform_power_mw";
149 break;
150 case STEADY_STATE_POWER_CHANGED:
151 attr = "max_steady_state_power_mw";
152 break;
153 case VOLTAGE_CURRENT_CHANGED:
154 attr = "no_load_voltage_mv";
155 break;
156 default:
157 dev_err(&pdev->dev, "Unsupported event [0x%x]\n", event);
158 return;
159 }
160
161
162
163
164
165 if (dptf_participant_type(handle) == 0x0CULL)
166 sysfs_notify(&pdev->dev.kobj, "dptf_battery", attr);
167 else
168 sysfs_notify(&pdev->dev.kobj, "dptf_power", attr);
169}
170
171static int dptf_power_add(struct platform_device *pdev)
172{
173 const struct attribute_group *attr_group;
174 struct acpi_device *acpi_dev;
175 unsigned long long ptype;
176 int result;
177
178 acpi_dev = ACPI_COMPANION(&(pdev->dev));
179 if (!acpi_dev)
180 return -ENODEV;
181
182 ptype = dptf_participant_type(acpi_dev->handle);
183 if (ptype == 0x11)
184 attr_group = &dptf_power_attribute_group;
185 else if (ptype == 0x0C)
186 attr_group = &dptf_battery_attribute_group;
187 else
188 return -ENODEV;
189
190 result = acpi_install_notify_handler(acpi_dev->handle,
191 ACPI_DEVICE_NOTIFY,
192 dptf_power_notify,
193 (void *)pdev);
194 if (result)
195 return result;
196
197 result = sysfs_create_group(&pdev->dev.kobj,
198 attr_group);
199 if (result) {
200 acpi_remove_notify_handler(acpi_dev->handle,
201 ACPI_DEVICE_NOTIFY,
202 dptf_power_notify);
203 return result;
204 }
205
206 platform_set_drvdata(pdev, acpi_dev);
207
208 return 0;
209}
210
211static int dptf_power_remove(struct platform_device *pdev)
212{
213 struct acpi_device *acpi_dev = platform_get_drvdata(pdev);
214
215 acpi_remove_notify_handler(acpi_dev->handle,
216 ACPI_DEVICE_NOTIFY,
217 dptf_power_notify);
218
219 if (dptf_participant_type(acpi_dev->handle) == 0x0CULL)
220 sysfs_remove_group(&pdev->dev.kobj, &dptf_battery_attribute_group);
221 else
222 sysfs_remove_group(&pdev->dev.kobj, &dptf_power_attribute_group);
223
224 return 0;
225}
226
227static const struct acpi_device_id int3407_device_ids[] = {
228 {"INT3407", 0},
229 {"INT3532", 0},
230 {"INTC1047", 0},
231 {"INTC1050", 0},
232 {"INTC1060", 0},
233 {"INTC1061", 0},
234 {"", 0},
235};
236MODULE_DEVICE_TABLE(acpi, int3407_device_ids);
237
238static struct platform_driver dptf_power_driver = {
239 .probe = dptf_power_add,
240 .remove = dptf_power_remove,
241 .driver = {
242 .name = "dptf_power",
243 .acpi_match_table = int3407_device_ids,
244 },
245};
246
247module_platform_driver(dptf_power_driver);
248
249MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
250MODULE_LICENSE("GPL v2");
251MODULE_DESCRIPTION("ACPI DPTF platform power driver");
252
