eeprom.c (02b17a41ad102934a3772ffc82f345345c232ee4) eeprom.c (72ee33907b629355d8fd1980140a467041a9f519)
1/*
2 * Thunderbolt Cactus Ridge driver - eeprom access
3 *
4 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
5 */
6
7#include <linux/crc32.h>
8#include <linux/property.h>

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199
200struct tb_drom_entry_header {
201 u8 len;
202 u8 index:6;
203 bool port_disabled:1; /* only valid if type is TB_DROM_ENTRY_PORT */
204 enum tb_drom_entry_type type:1;
205} __packed;
206
1/*
2 * Thunderbolt Cactus Ridge driver - eeprom access
3 *
4 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
5 */
6
7#include <linux/crc32.h>
8#include <linux/property.h>

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199
200struct tb_drom_entry_header {
201 u8 len;
202 u8 index:6;
203 bool port_disabled:1; /* only valid if type is TB_DROM_ENTRY_PORT */
204 enum tb_drom_entry_type type:1;
205} __packed;
206
207struct tb_drom_entry_generic {
208 struct tb_drom_entry_header header;
209 u8 data[0];
210} __packed;
211
207struct tb_drom_entry_port {
208 /* BYTES 0-1 */
209 struct tb_drom_entry_header header;
210 /* BYTE 2 */
211 u8 dual_link_port_rid:4;
212 u8 link_nr:1;
213 u8 unknown1:2;
214 bool has_dual_link_port:1;

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290 data[0], crc);
291 return -EIO;
292 }
293
294 *uid = *(u64 *)(data+1);
295 return 0;
296}
297
212struct tb_drom_entry_port {
213 /* BYTES 0-1 */
214 struct tb_drom_entry_header header;
215 /* BYTE 2 */
216 u8 dual_link_port_rid:4;
217 u8 link_nr:1;
218 u8 unknown1:2;
219 bool has_dual_link_port:1;

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295 data[0], crc);
296 return -EIO;
297 }
298
299 *uid = *(u64 *)(data+1);
300 return 0;
301}
302
303static int tb_drom_parse_entry_generic(struct tb_switch *sw,
304 struct tb_drom_entry_header *header)
305{
306 const struct tb_drom_entry_generic *entry =
307 (const struct tb_drom_entry_generic *)header;
308
309 switch (header->index) {
310 case 1:
311 /* Length includes 2 bytes header so remove it before copy */
312 sw->vendor_name = kstrndup(entry->data,
313 header->len - sizeof(*header), GFP_KERNEL);
314 if (!sw->vendor_name)
315 return -ENOMEM;
316 break;
317
318 case 2:
319 sw->device_name = kstrndup(entry->data,
320 header->len - sizeof(*header), GFP_KERNEL);
321 if (!sw->device_name)
322 return -ENOMEM;
323 break;
324 }
325
326 return 0;
327}
328
298static int tb_drom_parse_entry_port(struct tb_switch *sw,
299 struct tb_drom_entry_header *header)
300{
301 struct tb_port *port;
302 int res;
303 enum tb_port_type type;
304
305 port = &sw->ports[header->index];

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345 if (pos + 1 == drom_size || pos + entry->len > drom_size
346 || !entry->len) {
347 tb_sw_warn(sw, "drom buffer overrun, aborting\n");
348 return -EIO;
349 }
350
351 switch (entry->type) {
352 case TB_DROM_ENTRY_GENERIC:
329static int tb_drom_parse_entry_port(struct tb_switch *sw,
330 struct tb_drom_entry_header *header)
331{
332 struct tb_port *port;
333 int res;
334 enum tb_port_type type;
335
336 port = &sw->ports[header->index];

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376 if (pos + 1 == drom_size || pos + entry->len > drom_size
377 || !entry->len) {
378 tb_sw_warn(sw, "drom buffer overrun, aborting\n");
379 return -EIO;
380 }
381
382 switch (entry->type) {
383 case TB_DROM_ENTRY_GENERIC:
384 res = tb_drom_parse_entry_generic(sw, entry);
353 break;
354 case TB_DROM_ENTRY_PORT:
355 res = tb_drom_parse_entry_port(sw, entry);
356 break;
357 }
358 if (res)
359 return res;
360

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386 case TB_DROM_ENTRY_PORT:
387 res = tb_drom_parse_entry_port(sw, entry);
388 break;
389 }
390 if (res)
391 return res;
392

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