Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pnpacpi -- PnP ACPI driver |
| 3 | * |
| 4 | * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr> |
| 5 | * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2, or (at your option) any |
| 10 | * later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include <linux/acpi.h> |
| 23 | #include <linux/pnp.h> |
| 24 | #include <acpi/acpi_bus.h> |
| 25 | #include "pnpacpi.h" |
| 26 | |
| 27 | static int num = 0; |
| 28 | |
| 29 | static char __initdata excluded_id_list[] = |
| 30 | "PNP0C0A," /* Battery */ |
| 31 | "PNP0C0C,PNP0C0E,PNP0C0D," /* Button */ |
| 32 | "PNP0C09," /* EC */ |
| 33 | "PNP0C0B," /* Fan */ |
| 34 | "PNP0A03," /* PCI root */ |
| 35 | "PNP0C0F," /* Link device */ |
| 36 | "PNP0000," /* PIC */ |
| 37 | "PNP0100," /* Timer */ |
| 38 | ; |
| 39 | static inline int is_exclusive_device(struct acpi_device *dev) |
| 40 | { |
| 41 | return (!acpi_match_ids(dev, excluded_id_list)); |
| 42 | } |
| 43 | |
| 44 | void *pnpacpi_kmalloc(size_t size, int f) |
| 45 | { |
| 46 | void *p = kmalloc(size, f); |
| 47 | if (p) |
| 48 | memset(p, 0, size); |
| 49 | return p; |
| 50 | } |
| 51 | |
| 52 | /* |
| 53 | * Compatible Device IDs |
| 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 |
| 61 | static 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 | |
| 75 | static void __init pnpidacpi_to_pnpid(char *id, char *str) |
| 76 | { |
| 77 | str[0] = id[0]; |
| 78 | str[1] = id[1]; |
| 79 | str[2] = id[2]; |
| 80 | str[3] = tolower(id[3]); |
| 81 | str[4] = tolower(id[4]); |
| 82 | str[5] = tolower(id[5]); |
| 83 | str[6] = tolower(id[6]); |
| 84 | str[7] = '\0'; |
| 85 | } |
| 86 | |
| 87 | static int pnpacpi_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res) |
| 88 | { |
| 89 | acpi_status status; |
| 90 | status = pnpacpi_parse_allocated_resource((acpi_handle)dev->data, |
| 91 | &dev->res); |
| 92 | return ACPI_FAILURE(status) ? -ENODEV : 0; |
| 93 | } |
| 94 | |
| 95 | static int pnpacpi_set_resources(struct pnp_dev * dev, struct pnp_resource_table * res) |
| 96 | { |
| 97 | acpi_handle handle = dev->data; |
| 98 | struct acpi_buffer buffer; |
| 99 | int ret = 0; |
| 100 | acpi_status status; |
| 101 | |
| 102 | ret = pnpacpi_build_resource_template(handle, &buffer); |
| 103 | if (ret) |
| 104 | return ret; |
| 105 | ret = pnpacpi_encode_resources(res, &buffer); |
| 106 | if (ret) { |
| 107 | kfree(buffer.pointer); |
| 108 | return ret; |
| 109 | } |
| 110 | status = acpi_set_current_resources(handle, &buffer); |
| 111 | if (ACPI_FAILURE(status)) |
| 112 | ret = -EINVAL; |
| 113 | kfree(buffer.pointer); |
| 114 | return ret; |
| 115 | } |
| 116 | |
| 117 | static int pnpacpi_disable_resources(struct pnp_dev *dev) |
| 118 | { |
| 119 | acpi_status status; |
| 120 | |
| 121 | /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ |
| 122 | status = acpi_evaluate_object((acpi_handle)dev->data, |
| 123 | "_DIS", NULL, NULL); |
| 124 | return ACPI_FAILURE(status) ? -ENODEV : 0; |
| 125 | } |
| 126 | |
| 127 | struct pnp_protocol pnpacpi_protocol = { |
| 128 | .name = "Plug and Play ACPI", |
| 129 | .get = pnpacpi_get_resources, |
| 130 | .set = pnpacpi_set_resources, |
| 131 | .disable = pnpacpi_disable_resources, |
| 132 | }; |
| 133 | |
| 134 | static int __init pnpacpi_add_device(struct acpi_device *device) |
| 135 | { |
| 136 | acpi_handle temp = NULL; |
| 137 | acpi_status status; |
| 138 | struct pnp_id *dev_id; |
| 139 | struct pnp_dev *dev; |
| 140 | |
| 141 | if (!ispnpidacpi(acpi_device_hid(device)) || |
| 142 | is_exclusive_device(device)) |
| 143 | return 0; |
| 144 | |
| 145 | pnp_dbg("ACPI device : hid %s", acpi_device_hid(device)); |
| 146 | dev = pnpacpi_kmalloc(sizeof(struct pnp_dev), GFP_KERNEL); |
| 147 | if (!dev) { |
| 148 | pnp_err("Out of memory"); |
| 149 | return -ENOMEM; |
| 150 | } |
| 151 | dev->data = device->handle; |
| 152 | /* .enabled means if the device can decode the resources */ |
| 153 | dev->active = device->status.enabled; |
| 154 | status = acpi_get_handle(device->handle, "_SRS", &temp); |
| 155 | if (ACPI_SUCCESS(status)) |
| 156 | dev->capabilities |= PNP_CONFIGURABLE; |
| 157 | dev->capabilities |= PNP_READ; |
| 158 | if (device->flags.dynamic_status) |
| 159 | dev->capabilities |= PNP_WRITE; |
| 160 | if (device->flags.removable) |
| 161 | dev->capabilities |= PNP_REMOVABLE; |
| 162 | status = acpi_get_handle(device->handle, "_DIS", &temp); |
| 163 | if (ACPI_SUCCESS(status)) |
| 164 | dev->capabilities |= PNP_DISABLE; |
| 165 | |
| 166 | dev->protocol = &pnpacpi_protocol; |
| 167 | |
| 168 | if (strlen(acpi_device_name(device))) |
| 169 | strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); |
| 170 | else |
| 171 | strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); |
| 172 | |
| 173 | dev->number = num; |
| 174 | |
| 175 | /* set the initial values for the PnP device */ |
| 176 | dev_id = pnpacpi_kmalloc(sizeof(struct pnp_id), GFP_KERNEL); |
| 177 | if (!dev_id) |
| 178 | goto err; |
| 179 | pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id); |
| 180 | pnp_add_id(dev_id, dev); |
| 181 | |
| 182 | if(dev->active) { |
| 183 | /* parse allocated resource */ |
| 184 | status = pnpacpi_parse_allocated_resource(device->handle, &dev->res); |
| 185 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
| 186 | pnp_err("PnPACPI: METHOD_NAME__CRS failure for %s", dev_id->id); |
| 187 | goto err1; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | if(dev->capabilities & PNP_CONFIGURABLE) { |
| 192 | status = pnpacpi_parse_resource_option_data(device->handle, |
| 193 | dev); |
| 194 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
| 195 | pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s", dev_id->id); |
| 196 | goto err1; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /* parse compatible ids */ |
| 201 | if (device->flags.compatible_ids) { |
| 202 | struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; |
| 203 | int i; |
| 204 | |
| 205 | for (i = 0; i < cid_list->count; i++) { |
| 206 | if (!ispnpidacpi(cid_list->id[i].value)) |
| 207 | continue; |
| 208 | dev_id = pnpacpi_kmalloc(sizeof(struct pnp_id), |
| 209 | GFP_KERNEL); |
| 210 | if (!dev_id) |
| 211 | continue; |
| 212 | |
| 213 | pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id); |
| 214 | pnp_add_id(dev_id, dev); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | /* clear out the damaged flags */ |
| 219 | if (!dev->active) |
| 220 | pnp_init_resource_table(&dev->res); |
| 221 | pnp_add_device(dev); |
| 222 | num ++; |
| 223 | |
| 224 | return AE_OK; |
| 225 | err1: |
| 226 | kfree(dev_id); |
| 227 | err: |
| 228 | kfree(dev); |
| 229 | return -EINVAL; |
| 230 | } |
| 231 | |
| 232 | static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, |
| 233 | u32 lvl, void *context, void **rv) |
| 234 | { |
| 235 | struct acpi_device *device; |
| 236 | |
| 237 | if (!acpi_bus_get_device(handle, &device)) |
| 238 | pnpacpi_add_device(device); |
| 239 | else |
| 240 | return AE_CTRL_DEPTH; |
| 241 | return AE_OK; |
| 242 | } |
| 243 | |
| 244 | int pnpacpi_disabled __initdata; |
| 245 | int __init pnpacpi_init(void) |
| 246 | { |
| 247 | if (acpi_disabled || pnpacpi_disabled) { |
| 248 | pnp_info("PnP ACPI: disabled"); |
| 249 | return 0; |
| 250 | } |
| 251 | pnp_info("PnP ACPI init"); |
| 252 | pnp_register_protocol(&pnpacpi_protocol); |
| 253 | acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); |
| 254 | pnp_info("PnP ACPI: found %d devices", num); |
| 255 | return 0; |
| 256 | } |
| 257 | subsys_initcall(pnpacpi_init); |
| 258 | |
| 259 | static int __init pnpacpi_setup(char *str) |
| 260 | { |
| 261 | if (str == NULL) |
| 262 | return 1; |
| 263 | if (!strncmp(str, "off", 3)) |
| 264 | pnpacpi_disabled = 1; |
| 265 | return 1; |
| 266 | } |
| 267 | __setup("pnpacpi=", pnpacpi_setup); |
| 268 | |
| 269 | EXPORT_SYMBOL(pnpacpi_protocol); |