tpm_infineon.c (e5451c8f8330e03ad3cfa16048b4daf961af434f) tpm_infineon.c (8cfffc9d4d3786d3b496a021d7224e06328bac7d)
1/*
2 * Description:
3 * Device Driver for the Infineon Technologies
4 * SLD 9630 TT 1.1 and SLB 9635 TT 1.2 Trusted Platform Module
5 * Specifications at www.trustedcomputinggroup.org
6 *
7 * Copyright (C) 2005, Marcel Selhorst <tpmdd@selhorst.net>
8 * Sirrix AG - security technologies <tpmdd@sirrix.com> and

--- 181 unchanged lines hidden (view full) ---

190 status = tpm_data_in(STAT);
191 /* check the status-register if wait_for_bit is set */
192 if (status & 1 << wait_for_bit)
193 break;
194 msleep(TPM_MSLEEP_TIME);
195 }
196 if (i == TPM_MAX_TRIES) { /* timeout occurs */
197 if (wait_for_bit == STAT_XFE)
1/*
2 * Description:
3 * Device Driver for the Infineon Technologies
4 * SLD 9630 TT 1.1 and SLB 9635 TT 1.2 Trusted Platform Module
5 * Specifications at www.trustedcomputinggroup.org
6 *
7 * Copyright (C) 2005, Marcel Selhorst <tpmdd@selhorst.net>
8 * Sirrix AG - security technologies <tpmdd@sirrix.com> and

--- 181 unchanged lines hidden (view full) ---

190 status = tpm_data_in(STAT);
191 /* check the status-register if wait_for_bit is set */
192 if (status & 1 << wait_for_bit)
193 break;
194 msleep(TPM_MSLEEP_TIME);
195 }
196 if (i == TPM_MAX_TRIES) { /* timeout occurs */
197 if (wait_for_bit == STAT_XFE)
198 dev_err(chip->pdev, "Timeout in wait(STAT_XFE)\n");
198 dev_err(&chip->dev, "Timeout in wait(STAT_XFE)\n");
199 if (wait_for_bit == STAT_RDA)
199 if (wait_for_bit == STAT_RDA)
200 dev_err(chip->pdev, "Timeout in wait(STAT_RDA)\n");
200 dev_err(&chip->dev, "Timeout in wait(STAT_RDA)\n");
201 return -EIO;
202 }
203 return 0;
204};
205
206static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
207{
208 wait(chip, STAT_XFE);

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215 creation. Set the maximum number of WTX-packages in the definitions
216 above, if the number is reached, the waiting-time will be denied
217 and the TPM command has to be resend.
218 */
219
220static void tpm_wtx(struct tpm_chip *chip)
221{
222 number_of_wtx++;
201 return -EIO;
202 }
203 return 0;
204};
205
206static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
207{
208 wait(chip, STAT_XFE);

--- 6 unchanged lines hidden (view full) ---

215 creation. Set the maximum number of WTX-packages in the definitions
216 above, if the number is reached, the waiting-time will be denied
217 and the TPM command has to be resend.
218 */
219
220static void tpm_wtx(struct tpm_chip *chip)
221{
222 number_of_wtx++;
223 dev_info(chip->pdev, "Granting WTX (%02d / %02d)\n",
223 dev_info(&chip->dev, "Granting WTX (%02d / %02d)\n",
224 number_of_wtx, TPM_MAX_WTX_PACKAGES);
225 wait_and_send(chip, TPM_VL_VER);
226 wait_and_send(chip, TPM_CTRL_WTX);
227 wait_and_send(chip, 0x00);
228 wait_and_send(chip, 0x00);
229 msleep(TPM_WTX_MSLEEP_TIME);
230}
231
232static void tpm_wtx_abort(struct tpm_chip *chip)
233{
224 number_of_wtx, TPM_MAX_WTX_PACKAGES);
225 wait_and_send(chip, TPM_VL_VER);
226 wait_and_send(chip, TPM_CTRL_WTX);
227 wait_and_send(chip, 0x00);
228 wait_and_send(chip, 0x00);
229 msleep(TPM_WTX_MSLEEP_TIME);
230}
231
232static void tpm_wtx_abort(struct tpm_chip *chip)
233{
234 dev_info(chip->pdev, "Aborting WTX\n");
234 dev_info(&chip->dev, "Aborting WTX\n");
235 wait_and_send(chip, TPM_VL_VER);
236 wait_and_send(chip, TPM_CTRL_WTX_ABORT);
237 wait_and_send(chip, 0x00);
238 wait_and_send(chip, 0x00);
239 number_of_wtx = 0;
240 msleep(TPM_WTX_MSLEEP_TIME);
241}
242

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252 for (i = 0; i < 4; i++) {
253 ret = wait(chip, STAT_RDA);
254 if (ret)
255 return -EIO;
256 buf[i] = tpm_data_in(RDFIFO);
257 }
258
259 if (buf[0] != TPM_VL_VER) {
235 wait_and_send(chip, TPM_VL_VER);
236 wait_and_send(chip, TPM_CTRL_WTX_ABORT);
237 wait_and_send(chip, 0x00);
238 wait_and_send(chip, 0x00);
239 number_of_wtx = 0;
240 msleep(TPM_WTX_MSLEEP_TIME);
241}
242

--- 9 unchanged lines hidden (view full) ---

252 for (i = 0; i < 4; i++) {
253 ret = wait(chip, STAT_RDA);
254 if (ret)
255 return -EIO;
256 buf[i] = tpm_data_in(RDFIFO);
257 }
258
259 if (buf[0] != TPM_VL_VER) {
260 dev_err(chip->pdev,
260 dev_err(&chip->dev,
261 "Wrong transport protocol implementation!\n");
262 return -EIO;
263 }
264
265 if (buf[1] == TPM_CTRL_DATA) {
266 /* size of the data received */
267 size = ((buf[2] << 8) | buf[3]);
268
269 for (i = 0; i < size; i++) {
270 wait(chip, STAT_RDA);
271 buf[i] = tpm_data_in(RDFIFO);
272 }
273
274 if ((size == 0x6D00) && (buf[1] == 0x80)) {
261 "Wrong transport protocol implementation!\n");
262 return -EIO;
263 }
264
265 if (buf[1] == TPM_CTRL_DATA) {
266 /* size of the data received */
267 size = ((buf[2] << 8) | buf[3]);
268
269 for (i = 0; i < size; i++) {
270 wait(chip, STAT_RDA);
271 buf[i] = tpm_data_in(RDFIFO);
272 }
273
274 if ((size == 0x6D00) && (buf[1] == 0x80)) {
275 dev_err(chip->pdev, "Error handling on vendor layer!\n");
275 dev_err(&chip->dev, "Error handling on vendor layer!\n");
276 return -EIO;
277 }
278
279 for (i = 0; i < size; i++)
280 buf[i] = buf[i + 6];
281
282 size = size - 6;
283 return size;
284 }
285
286 if (buf[1] == TPM_CTRL_WTX) {
276 return -EIO;
277 }
278
279 for (i = 0; i < size; i++)
280 buf[i] = buf[i + 6];
281
282 size = size - 6;
283 return size;
284 }
285
286 if (buf[1] == TPM_CTRL_WTX) {
287 dev_info(chip->pdev, "WTX-package received\n");
287 dev_info(&chip->dev, "WTX-package received\n");
288 if (number_of_wtx < TPM_MAX_WTX_PACKAGES) {
289 tpm_wtx(chip);
290 goto recv_begin;
291 } else {
292 tpm_wtx_abort(chip);
293 goto recv_begin;
294 }
295 }
296
297 if (buf[1] == TPM_CTRL_WTX_ABORT_ACK) {
288 if (number_of_wtx < TPM_MAX_WTX_PACKAGES) {
289 tpm_wtx(chip);
290 goto recv_begin;
291 } else {
292 tpm_wtx_abort(chip);
293 goto recv_begin;
294 }
295 }
296
297 if (buf[1] == TPM_CTRL_WTX_ABORT_ACK) {
298 dev_info(chip->pdev, "WTX-abort acknowledged\n");
298 dev_info(&chip->dev, "WTX-abort acknowledged\n");
299 return size;
300 }
301
302 if (buf[1] == TPM_CTRL_ERROR) {
299 return size;
300 }
301
302 if (buf[1] == TPM_CTRL_ERROR) {
303 dev_err(chip->pdev, "ERROR-package received:\n");
303 dev_err(&chip->dev, "ERROR-package received:\n");
304 if (buf[4] == TPM_INF_NAK)
304 if (buf[4] == TPM_INF_NAK)
305 dev_err(chip->pdev,
305 dev_err(&chip->dev,
306 "-> Negative acknowledgement"
307 " - retransmit command!\n");
308 return -EIO;
309 }
310 return -EIO;
311}
312
313static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
314{
315 int i;
316 int ret;
317 u8 count_high, count_low, count_4, count_3, count_2, count_1;
318
319 /* Disabling Reset, LP and IRQC */
320 tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
321
322 ret = empty_fifo(chip, 1);
323 if (ret) {
306 "-> Negative acknowledgement"
307 " - retransmit command!\n");
308 return -EIO;
309 }
310 return -EIO;
311}
312
313static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
314{
315 int i;
316 int ret;
317 u8 count_high, count_low, count_4, count_3, count_2, count_1;
318
319 /* Disabling Reset, LP and IRQC */
320 tpm_data_out(RESET_LP_IRQC_DISABLE, CMD);
321
322 ret = empty_fifo(chip, 1);
323 if (ret) {
324 dev_err(chip->pdev, "Timeout while clearing FIFO\n");
324 dev_err(&chip->dev, "Timeout while clearing FIFO\n");
325 return -EIO;
326 }
327
328 ret = wait(chip, STAT_XFE);
329 if (ret)
330 return -EIO;
331
332 count_4 = (count & 0xff000000) >> 24;

--- 297 unchanged lines hidden --- 		325 return -EIO;
326 }
327
328 ret = wait(chip, STAT_XFE);
329 if (ret)
330 return -EIO;
331
332 count_4 = (count & 0xff000000) >> 24;

--- 297 unchanged lines hidden ---