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22#include <linux/acpi.h>
23#include <linux/pnp.h>
24#include <linux/mod_devicetable.h>
25#include <acpi/acpi_bus.h>
26
27#include "../base.h"
28#include "pnpacpi.h"
29
30static int num = 0;
31
32
33
34
35
36
37
38
39static struct acpi_device_id excluded_id_list[] __initdata = {
40 {"PNP0C09", 0},
41 {"PNP0C0F", 0},
42 {"PNP0000", 0},
43 {"PNP0100", 0},
44 {"", 0},
45};
46
47static inline int __init is_exclusive_device(struct acpi_device *dev)
48{
49 return (!acpi_match_device_ids(dev, excluded_id_list));
50}
51
52
53
54
55#define TEST_HEX(c) \
56 if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
57 return 0
58#define TEST_ALPHA(c) \
59 if (!('@' <= (c) || (c) <= 'Z')) \
60 return 0
61static int __init ispnpidacpi(char *id)
62{
63 TEST_ALPHA(id[0]);
64 TEST_ALPHA(id[1]);
65 TEST_ALPHA(id[2]);
66 TEST_HEX(id[3]);
67 TEST_HEX(id[4]);
68 TEST_HEX(id[5]);
69 TEST_HEX(id[6]);
70 if (id[7] != '\0')
71 return 0;
72 return 1;
73}
74
75static int pnpacpi_get_resources(struct pnp_dev *dev)
76{
77 pnp_dbg(&dev->dev, "get resources\n");
78 return pnpacpi_parse_allocated_resource(dev);
79}
80
81static int pnpacpi_set_resources(struct pnp_dev *dev)
82{
83 acpi_handle handle = dev->data;
84 struct acpi_buffer buffer;
85 int ret;
86
87 pnp_dbg(&dev->dev, "set resources\n");
88 ret = pnpacpi_build_resource_template(dev, &buffer);
89 if (ret)
90 return ret;
91 ret = pnpacpi_encode_resources(dev, &buffer);
92 if (ret) {
93 kfree(buffer.pointer);
94 return ret;
95 }
96 if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
97 ret = -EINVAL;
98 else if (acpi_bus_power_manageable(handle))
99 ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
100 kfree(buffer.pointer);
101 return ret;
102}
103
104static int pnpacpi_disable_resources(struct pnp_dev *dev)
105{
106 acpi_handle handle = dev->data;
107 int ret;
108
109 dev_dbg(&dev->dev, "disable resources\n");
110
111
112 ret = 0;
113 if (acpi_bus_power_manageable(handle))
114 acpi_bus_set_power(handle, ACPI_STATE_D3);
115
116 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
117 ret = -ENODEV;
118 return ret;
119}
120
121#ifdef CONFIG_ACPI_SLEEP
122static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
123{
124 int power_state;
125
126 power_state = acpi_pm_device_sleep_state(&dev->dev, NULL);
127 if (power_state < 0)
128 power_state = (state.event == PM_EVENT_ON) ?
129 ACPI_STATE_D0 : ACPI_STATE_D3;
130
131 return acpi_bus_set_power((acpi_handle) dev->data, power_state);
132}
133
134static int pnpacpi_resume(struct pnp_dev *dev)
135{
136 return acpi_bus_set_power((acpi_handle) dev->data, ACPI_STATE_D0);
137}
138#endif
139
140static struct pnp_protocol pnpacpi_protocol = {
141 .name = "Plug and Play ACPI",
142 .get = pnpacpi_get_resources,
143 .set = pnpacpi_set_resources,
144 .disable = pnpacpi_disable_resources,
145#ifdef CONFIG_ACPI_SLEEP
146 .suspend = pnpacpi_suspend,
147 .resume = pnpacpi_resume,
148#endif
149};
150
151static int __init pnpacpi_add_device(struct acpi_device *device)
152{
153 acpi_handle temp = NULL;
154 acpi_status status;
155 struct pnp_dev *dev;
156 struct acpi_hardware_id *id;
157
158
159
160
161
162 status = acpi_get_handle(device->handle, "_CRS", &temp);
163 if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
164 is_exclusive_device(device) || (!device->status.present))
165 return 0;
166
167 dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
168 if (!dev)
169 return -ENOMEM;
170
171 dev->data = device->handle;
172
173 dev->active = device->status.enabled;
174 status = acpi_get_handle(device->handle, "_SRS", &temp);
175 if (ACPI_SUCCESS(status))
176 dev->capabilities |= PNP_CONFIGURABLE;
177 dev->capabilities |= PNP_READ;
178 if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
179 dev->capabilities |= PNP_WRITE;
180 if (device->flags.removable)
181 dev->capabilities |= PNP_REMOVABLE;
182 status = acpi_get_handle(device->handle, "_DIS", &temp);
183 if (ACPI_SUCCESS(status))
184 dev->capabilities |= PNP_DISABLE;
185
186 if (strlen(acpi_device_name(device)))
187 strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
188 else
189 strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
190
191 if (dev->active)
192 pnpacpi_parse_allocated_resource(dev);
193
194 if (dev->capabilities & PNP_CONFIGURABLE)
195 pnpacpi_parse_resource_option_data(dev);
196
197 list_for_each_entry(id, &device->pnp.ids, list) {
198 if (!strcmp(id->id, acpi_device_hid(device)))
199 continue;
200 if (!ispnpidacpi(id->id))
201 continue;
202 pnp_add_id(dev, id->id);
203 }
204
205
206 if (!dev->active)
207 pnp_init_resources(dev);
208 pnp_add_device(dev);
209 num++;
210
211 return AE_OK;
212}
213
214static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
215 u32 lvl, void *context,
216 void **rv)
217{
218 struct acpi_device *device;
219
220 if (!acpi_bus_get_device(handle, &device))
221 pnpacpi_add_device(device);
222 else
223 return AE_CTRL_DEPTH;
224 return AE_OK;
225}
226
227static int __init acpi_pnp_match(struct device *dev, void *_pnp)
228{
229 struct acpi_device *acpi = to_acpi_device(dev);
230 struct pnp_dev *pnp = _pnp;
231
232
233 return !acpi_get_physical_device(acpi->handle)
234 && compare_pnp_id(pnp->id, acpi_device_hid(acpi));
235}
236
237static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle)
238{
239 struct device *adev;
240 struct acpi_device *acpi;
241
242 adev = bus_find_device(&acpi_bus_type, NULL,
243 to_pnp_dev(dev), acpi_pnp_match);
244 if (!adev)
245 return -ENODEV;
246
247 acpi = to_acpi_device(adev);
248 *handle = acpi->handle;
249 put_device(adev);
250 return 0;
251}
252
253
254
255
256static struct acpi_bus_type __initdata acpi_pnp_bus = {
257 .bus = &pnp_bus_type,
258 .find_device = acpi_pnp_find_device,
259};
260
261int pnpacpi_disabled __initdata;
262static int __init pnpacpi_init(void)
263{
264 if (acpi_disabled || pnpacpi_disabled) {
265 printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
266 return 0;
267 }
268 printk(KERN_INFO "pnp: PnP ACPI init\n");
269 pnp_register_protocol(&pnpacpi_protocol);
270 register_acpi_bus_type(&acpi_pnp_bus);
271 acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
272 printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
273 unregister_acpi_bus_type(&acpi_pnp_bus);
274 pnp_platform_devices = 1;
275 return 0;
276}
277
278fs_initcall(pnpacpi_init);
279
280static int __init pnpacpi_setup(char *str)
281{
282 if (str == NULL)
283 return 1;
284 if (!strncmp(str, "off", 3))
285 pnpacpi_disabled = 1;
286 return 1;
287}
288
289__setup("pnpacpi=", pnpacpi_setup);
290