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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rsio - IO and DMA resource descriptors | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
9 | * All rights reserved. | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acresrc.h> | |
46 | ||
47 | #define _COMPONENT ACPI_RESOURCES | |
4be44fcd | 48 | ACPI_MODULE_NAME("rsio") |
1da177e4 LT |
49 | |
50 | /******************************************************************************* | |
51 | * | |
50eca3eb | 52 | * FUNCTION: acpi_rs_get_io |
1da177e4 | 53 | * |
50eca3eb BM |
54 | * PARAMETERS: Aml - Pointer to the AML resource descriptor |
55 | * aml_resource_length - Length of the resource from the AML header | |
56 | * Resource - Where the internal resource is returned | |
1da177e4 LT |
57 | * |
58 | * RETURN: Status | |
59 | * | |
50eca3eb BM |
60 | * DESCRIPTION: Convert a raw AML resource descriptor to the corresponding |
61 | * internal resource descriptor, simplifying bitflags and handling | |
62 | * alignment and endian issues if necessary. | |
1da177e4 LT |
63 | * |
64 | ******************************************************************************/ | |
1da177e4 | 65 | acpi_status |
50eca3eb BM |
66 | acpi_rs_get_io(union aml_resource *aml, |
67 | u16 aml_resource_length, struct acpi_resource *resource) | |
1da177e4 | 68 | { |
50eca3eb | 69 | ACPI_FUNCTION_TRACE("rs_get_io"); |
1da177e4 | 70 | |
50eca3eb | 71 | /* Get the Decode flag */ |
1da177e4 | 72 | |
50eca3eb | 73 | resource->data.io.io_decode = aml->io.information & 0x01; |
44f6c012 | 74 | |
50eca3eb BM |
75 | /* |
76 | * Get the following contiguous fields from the AML descriptor: | |
77 | * Minimum Base Address | |
78 | * Maximum Base Address | |
79 | * Address Alignment | |
80 | * Length | |
81 | */ | |
82 | ACPI_MOVE_16_TO_32(&resource->data.io.minimum, &aml->io.minimum); | |
83 | ACPI_MOVE_16_TO_32(&resource->data.io.maximum, &aml->io.maximum); | |
84 | resource->data.io.alignment = aml->io.alignment; | |
85 | resource->data.io.address_length = aml->io.address_length; | |
1da177e4 | 86 | |
50eca3eb | 87 | /* Complete the resource header */ |
1da177e4 | 88 | |
50eca3eb BM |
89 | resource->type = ACPI_RESOURCE_TYPE_IO; |
90 | resource->length = ACPI_SIZEOF_RESOURCE(struct acpi_resource_io); | |
4be44fcd | 91 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
92 | } |
93 | ||
1da177e4 LT |
94 | /******************************************************************************* |
95 | * | |
50eca3eb | 96 | * FUNCTION: acpi_rs_set_io |
1da177e4 | 97 | * |
50eca3eb BM |
98 | * PARAMETERS: Resource - Pointer to the resource descriptor |
99 | * Aml - Where the AML descriptor is returned | |
1da177e4 LT |
100 | * |
101 | * RETURN: Status | |
102 | * | |
50eca3eb BM |
103 | * DESCRIPTION: Convert an internal resource descriptor to the corresponding |
104 | * external AML resource descriptor. | |
1da177e4 LT |
105 | * |
106 | ******************************************************************************/ | |
107 | ||
108 | acpi_status | |
50eca3eb | 109 | acpi_rs_set_io(struct acpi_resource *resource, union aml_resource *aml) |
1da177e4 | 110 | { |
50eca3eb | 111 | ACPI_FUNCTION_TRACE("rs_set_io"); |
1da177e4 | 112 | |
50eca3eb | 113 | /* I/O Information Byte */ |
44f6c012 | 114 | |
50eca3eb | 115 | aml->io.information = (u8) (resource->data.io.io_decode & 0x01); |
1da177e4 | 116 | |
50eca3eb BM |
117 | /* |
118 | * Set the following contiguous fields in the AML descriptor: | |
119 | * Minimum Base Address | |
120 | * Maximum Base Address | |
121 | * Address Alignment | |
122 | * Length | |
123 | */ | |
124 | ACPI_MOVE_32_TO_16(&aml->io.minimum, &resource->data.io.minimum); | |
125 | ACPI_MOVE_32_TO_16(&aml->io.maximum, &resource->data.io.maximum); | |
126 | aml->io.alignment = (u8) resource->data.io.alignment; | |
127 | aml->io.address_length = (u8) resource->data.io.address_length; | |
1da177e4 | 128 | |
50eca3eb | 129 | /* Complete the AML descriptor header */ |
44f6c012 | 130 | |
50eca3eb BM |
131 | acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_IO, |
132 | sizeof(struct aml_resource_io), aml); | |
4be44fcd | 133 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
134 | } |
135 | ||
1da177e4 LT |
136 | /******************************************************************************* |
137 | * | |
50eca3eb | 138 | * FUNCTION: acpi_rs_get_fixed_io |
1da177e4 | 139 | * |
50eca3eb BM |
140 | * PARAMETERS: Aml - Pointer to the AML resource descriptor |
141 | * aml_resource_length - Length of the resource from the AML header | |
142 | * Resource - Where the internal resource is returned | |
1da177e4 LT |
143 | * |
144 | * RETURN: Status | |
145 | * | |
50eca3eb BM |
146 | * DESCRIPTION: Convert a raw AML resource descriptor to the corresponding |
147 | * internal resource descriptor, simplifying bitflags and handling | |
148 | * alignment and endian issues if necessary. | |
1da177e4 LT |
149 | * |
150 | ******************************************************************************/ | |
151 | ||
152 | acpi_status | |
50eca3eb BM |
153 | acpi_rs_get_fixed_io(union aml_resource *aml, |
154 | u16 aml_resource_length, struct acpi_resource *resource) | |
1da177e4 | 155 | { |
50eca3eb | 156 | ACPI_FUNCTION_TRACE("rs_get_fixed_io"); |
44f6c012 | 157 | |
50eca3eb BM |
158 | /* |
159 | * Get the following contiguous fields from the AML descriptor: | |
160 | * Base Address | |
161 | * Length | |
162 | */ | |
163 | ACPI_MOVE_16_TO_32(&resource->data.fixed_io.address, | |
164 | &aml->fixed_io.address); | |
165 | resource->data.fixed_io.address_length = aml->fixed_io.address_length; | |
1da177e4 | 166 | |
50eca3eb | 167 | /* Complete the resource header */ |
1da177e4 | 168 | |
50eca3eb BM |
169 | resource->type = ACPI_RESOURCE_TYPE_FIXED_IO; |
170 | resource->length = ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io); | |
4be44fcd | 171 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
172 | } |
173 | ||
1da177e4 LT |
174 | /******************************************************************************* |
175 | * | |
50eca3eb | 176 | * FUNCTION: acpi_rs_set_fixed_io |
1da177e4 | 177 | * |
50eca3eb BM |
178 | * PARAMETERS: Resource - Pointer to the resource descriptor |
179 | * Aml - Where the AML descriptor is returned | |
1da177e4 LT |
180 | * |
181 | * RETURN: Status | |
182 | * | |
50eca3eb BM |
183 | * DESCRIPTION: Convert an internal resource descriptor to the corresponding |
184 | * external AML resource descriptor. | |
1da177e4 LT |
185 | * |
186 | ******************************************************************************/ | |
187 | ||
188 | acpi_status | |
50eca3eb | 189 | acpi_rs_set_fixed_io(struct acpi_resource *resource, union aml_resource *aml) |
1da177e4 | 190 | { |
50eca3eb BM |
191 | ACPI_FUNCTION_TRACE("rs_set_fixed_io"); |
192 | ||
193 | /* | |
194 | * Set the following contiguous fields in the AML descriptor: | |
195 | * Base Address | |
196 | * Length | |
197 | */ | |
198 | ACPI_MOVE_32_TO_16(&aml->fixed_io.address, | |
199 | &resource->data.fixed_io.address); | |
200 | aml->fixed_io.address_length = | |
201 | (u8) resource->data.fixed_io.address_length; | |
202 | ||
203 | /* Complete the AML descriptor header */ | |
204 | ||
205 | acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_FIXED_IO, | |
206 | sizeof(struct aml_resource_fixed_io), aml); | |
4be44fcd | 207 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
208 | } |
209 | ||
1da177e4 LT |
210 | /******************************************************************************* |
211 | * | |
50eca3eb | 212 | * FUNCTION: acpi_rs_get_dma |
1da177e4 | 213 | * |
50eca3eb BM |
214 | * PARAMETERS: Aml - Pointer to the AML resource descriptor |
215 | * aml_resource_length - Length of the resource from the AML header | |
216 | * Resource - Where the internal resource is returned | |
1da177e4 LT |
217 | * |
218 | * RETURN: Status | |
219 | * | |
50eca3eb BM |
220 | * DESCRIPTION: Convert a raw AML resource descriptor to the corresponding |
221 | * internal resource descriptor, simplifying bitflags and handling | |
222 | * alignment and endian issues if necessary. | |
1da177e4 LT |
223 | * |
224 | ******************************************************************************/ | |
225 | ||
226 | acpi_status | |
50eca3eb BM |
227 | acpi_rs_get_dma(union aml_resource *aml, |
228 | u16 aml_resource_length, struct acpi_resource *resource) | |
1da177e4 | 229 | { |
50eca3eb BM |
230 | u32 channel_count = 0; |
231 | u32 i; | |
232 | u8 temp8; | |
1da177e4 | 233 | |
50eca3eb | 234 | ACPI_FUNCTION_TRACE("rs_get_dma"); |
1da177e4 LT |
235 | |
236 | /* Decode the DMA channel bits */ | |
237 | ||
50eca3eb BM |
238 | for (i = 0; i < 8; i++) { |
239 | if ((aml->dma.dma_channel_mask >> i) & 0x01) { | |
240 | resource->data.dma.channels[channel_count] = i; | |
241 | channel_count++; | |
1da177e4 LT |
242 | } |
243 | } | |
244 | ||
50eca3eb BM |
245 | resource->length = 0; |
246 | resource->data.dma.channel_count = channel_count; | |
44f6c012 | 247 | |
50eca3eb BM |
248 | /* |
249 | * Calculate the structure size based upon the number of channels | |
250 | * Note: Zero DMA channels is valid | |
251 | */ | |
252 | if (channel_count > 0) { | |
253 | resource->length = (u32) (channel_count - 1) * 4; | |
1da177e4 LT |
254 | } |
255 | ||
50eca3eb | 256 | /* Get the flags: transfer preference, bus mastering, channel speed */ |
44f6c012 | 257 | |
50eca3eb BM |
258 | temp8 = aml->dma.flags; |
259 | resource->data.dma.transfer = temp8 & 0x03; | |
260 | resource->data.dma.bus_master = (temp8 >> 2) & 0x01; | |
261 | resource->data.dma.type = (temp8 >> 5) & 0x03; | |
1da177e4 | 262 | |
50eca3eb | 263 | if (resource->data.dma.transfer == 0x03) { |
4be44fcd LB |
264 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
265 | "Invalid DMA.Transfer preference (3)\n")); | |
266 | return_ACPI_STATUS(AE_BAD_DATA); | |
1da177e4 LT |
267 | } |
268 | ||
50eca3eb | 269 | /* Complete the resource header */ |
44f6c012 | 270 | |
50eca3eb BM |
271 | resource->type = ACPI_RESOURCE_TYPE_DMA; |
272 | resource->length += ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma); | |
4be44fcd | 273 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
274 | } |
275 | ||
1da177e4 LT |
276 | /******************************************************************************* |
277 | * | |
50eca3eb | 278 | * FUNCTION: acpi_rs_set_dma |
1da177e4 | 279 | * |
50eca3eb BM |
280 | * PARAMETERS: Resource - Pointer to the resource descriptor |
281 | * Aml - Where the AML descriptor is returned | |
1da177e4 LT |
282 | * |
283 | * RETURN: Status | |
284 | * | |
50eca3eb BM |
285 | * DESCRIPTION: Convert an internal resource descriptor to the corresponding |
286 | * external AML resource descriptor. | |
1da177e4 LT |
287 | * |
288 | ******************************************************************************/ | |
289 | ||
290 | acpi_status | |
50eca3eb | 291 | acpi_rs_set_dma(struct acpi_resource *resource, union aml_resource *aml) |
1da177e4 | 292 | { |
50eca3eb | 293 | u8 i; |
44f6c012 | 294 | |
50eca3eb | 295 | ACPI_FUNCTION_TRACE("rs_set_dma"); |
1da177e4 | 296 | |
50eca3eb | 297 | /* Convert channel list to 8-bit DMA channel bitmask */ |
44f6c012 | 298 | |
50eca3eb BM |
299 | aml->dma.dma_channel_mask = 0; |
300 | for (i = 0; i < resource->data.dma.channel_count; i++) { | |
301 | aml->dma.dma_channel_mask |= | |
302 | (1 << resource->data.dma.channels[i]); | |
1da177e4 LT |
303 | } |
304 | ||
50eca3eb | 305 | /* Set the DMA Flag bits */ |
1da177e4 | 306 | |
50eca3eb BM |
307 | aml->dma.flags = (u8) |
308 | (((resource->data.dma.type & 0x03) << 5) | | |
309 | ((resource->data.dma.bus_master & 0x01) << 2) | | |
310 | (resource->data.dma.transfer & 0x03)); | |
1da177e4 | 311 | |
50eca3eb | 312 | /* Complete the AML descriptor header */ |
44f6c012 | 313 | |
50eca3eb BM |
314 | acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_DMA, |
315 | sizeof(struct aml_resource_dma), aml); | |
4be44fcd | 316 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 317 | } |