97 static int iwl_eeprom_acquire_semaphore(struct iwl_trans *trans)  in iwl_eeprom_acquire_semaphore()  argument
104 		iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,  in iwl_eeprom_acquire_semaphore()
108 		ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,  in iwl_eeprom_acquire_semaphore()
113 			IWL_DEBUG_EEPROM(trans->dev,  in iwl_eeprom_acquire_semaphore()
123 static void iwl_eeprom_release_semaphore(struct iwl_trans *trans)  in iwl_eeprom_release_semaphore()  argument
125 	iwl_clear_bit(trans, CSR_HW_IF_CONFIG_REG,  in iwl_eeprom_release_semaphore()
129 static int iwl_eeprom_verify_signature(struct iwl_trans *trans, bool nvm_is_otp)  in iwl_eeprom_verify_signature()  argument
131 	u32 gp = iwl_read32(trans, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;  in iwl_eeprom_verify_signature()
133 	IWL_DEBUG_EEPROM(trans->dev, "EEPROM signature=0x%08x\n", gp);  in iwl_eeprom_verify_signature()
138 			IWL_ERR(trans, "EEPROM with bad signature: 0x%08x\n",  in iwl_eeprom_verify_signature()
146 			IWL_ERR(trans, "OTP with bad signature: 0x%08x\n", gp);  in iwl_eeprom_verify_signature()
152 		IWL_ERR(trans,  in iwl_eeprom_verify_signature()
165 static void iwl_set_otp_access_absolute(struct iwl_trans *trans)  in iwl_set_otp_access_absolute()  argument
167 	iwl_read32(trans, CSR_OTP_GP_REG);  in iwl_set_otp_access_absolute()
169 	iwl_clear_bit(trans, CSR_OTP_GP_REG,  in iwl_set_otp_access_absolute()
173 static int iwl_nvm_is_otp(struct iwl_trans *trans)  in iwl_nvm_is_otp()  argument
178 	switch (trans->hw_rev & CSR_HW_REV_TYPE_MSK) {  in iwl_nvm_is_otp()
180 		IWL_ERR(trans, "Unknown hardware type\n");  in iwl_nvm_is_otp()
188 		otpgp = iwl_read32(trans, CSR_OTP_GP_REG);  in iwl_nvm_is_otp()
195 static int iwl_init_otp_access(struct iwl_trans *trans)  in iwl_init_otp_access()  argument
200 	iwl_write32(trans, CSR_GP_CNTRL,  in iwl_init_otp_access()
201 		    iwl_read32(trans, CSR_GP_CNTRL) |  in iwl_init_otp_access()
205 	ret = iwl_poll_bit(trans, CSR_GP_CNTRL,  in iwl_init_otp_access()
210 		IWL_ERR(trans, "Time out access OTP\n");  in iwl_init_otp_access()
212 		iwl_set_bits_prph(trans, APMG_PS_CTRL_REG,  in iwl_init_otp_access()
215 		iwl_clear_bits_prph(trans, APMG_PS_CTRL_REG,  in iwl_init_otp_access()
222 		if (trans->cfg->base_params->shadow_ram_support)  in iwl_init_otp_access()
223 			iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,  in iwl_init_otp_access()
229 static int iwl_read_otp_word(struct iwl_trans *trans, u16 addr,  in iwl_read_otp_word()  argument
236 	iwl_write32(trans, CSR_EEPROM_REG,  in iwl_read_otp_word()
238 	ret = iwl_poll_bit(trans, CSR_EEPROM_REG,  in iwl_read_otp_word()
243 		IWL_ERR(trans, "Time out reading OTP[%d]\n", addr);  in iwl_read_otp_word()
246 	r = iwl_read32(trans, CSR_EEPROM_REG);  in iwl_read_otp_word()
248 	otpgp = iwl_read32(trans, CSR_OTP_GP_REG);  in iwl_read_otp_word()
252 		iwl_set_bit(trans, CSR_OTP_GP_REG,  in iwl_read_otp_word()
254 		IWL_ERR(trans, "Uncorrectable OTP ECC error, abort OTP read\n");  in iwl_read_otp_word()
260 		iwl_set_bit(trans, CSR_OTP_GP_REG,  in iwl_read_otp_word()
262 		IWL_ERR(trans, "Correctable OTP ECC error, continue read\n");  in iwl_read_otp_word()
271 static bool iwl_is_otp_empty(struct iwl_trans *trans)  in iwl_is_otp_empty()  argument
278 	if (!iwl_read_otp_word(trans, next_link_addr, &link_value)) {  in iwl_is_otp_empty()
280 			IWL_ERR(trans, "OTP is empty\n");  in iwl_is_otp_empty()
284 		IWL_ERR(trans, "Unable to read first block of OTP list.\n");  in iwl_is_otp_empty()
301 static int iwl_find_otp_image(struct iwl_trans *trans,  in iwl_find_otp_image()  argument
309 	iwl_set_otp_access_absolute(trans);  in iwl_find_otp_image()
312 	if (iwl_is_otp_empty(trans))  in iwl_find_otp_image()
326 		IWL_DEBUG_EEPROM(trans->dev, "OTP blocks %d addr 0x%x\n",  in iwl_find_otp_image()
328 		if (iwl_read_otp_word(trans, next_link_addr, &link_value))  in iwl_find_otp_image()
343 	} while (usedblocks <= trans->cfg->base_params->max_ll_items);  in iwl_find_otp_image()
346 	IWL_DEBUG_EEPROM(trans->dev, "OTP has no valid blocks\n");  in iwl_find_otp_image()
358 int iwl_read_eeprom(struct iwl_trans *trans, u8 **eeprom, size_t *eeprom_size)  in iwl_read_eeprom()  argument
361 	u32 gp = iwl_read32(trans, CSR_EEPROM_GP);  in iwl_read_eeprom()
372 	nvm_is_otp = iwl_nvm_is_otp(trans);  in iwl_read_eeprom()
376 	sz = trans->cfg->base_params->eeprom_size;  in iwl_read_eeprom()
377 	IWL_DEBUG_EEPROM(trans->dev, "NVM size = %d\n", sz);  in iwl_read_eeprom()
383 	ret = iwl_eeprom_verify_signature(trans, nvm_is_otp);  in iwl_read_eeprom()
385 		IWL_ERR(trans, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);  in iwl_read_eeprom()
390 	ret = iwl_eeprom_acquire_semaphore(trans);  in iwl_read_eeprom()
392 		IWL_ERR(trans, "Failed to acquire EEPROM semaphore.\n");  in iwl_read_eeprom()
397 		ret = iwl_init_otp_access(trans);  in iwl_read_eeprom()
399 			IWL_ERR(trans, "Failed to initialize OTP access.\n");  in iwl_read_eeprom()
403 		iwl_write32(trans, CSR_EEPROM_GP,  in iwl_read_eeprom()
404 			    iwl_read32(trans, CSR_EEPROM_GP) &  in iwl_read_eeprom()
407 		iwl_set_bit(trans, CSR_OTP_GP_REG,  in iwl_read_eeprom()
411 		if (!trans->cfg->base_params->shadow_ram_support) {  in iwl_read_eeprom()
412 			ret = iwl_find_otp_image(trans, &validblockaddr);  in iwl_read_eeprom()
420 			ret = iwl_read_otp_word(trans, addr, &eeprom_data);  in iwl_read_eeprom()
431 			iwl_write32(trans, CSR_EEPROM_REG,  in iwl_read_eeprom()
434 			ret = iwl_poll_bit(trans, CSR_EEPROM_REG,  in iwl_read_eeprom()
439 				IWL_ERR(trans,  in iwl_read_eeprom()
443 			r = iwl_read32(trans, CSR_EEPROM_REG);  in iwl_read_eeprom()
448 	IWL_DEBUG_EEPROM(trans->dev, "NVM Type: %s\n",  in iwl_read_eeprom()
451 	iwl_eeprom_release_semaphore(trans);  in iwl_read_eeprom()
458 	iwl_eeprom_release_semaphore(trans);  in iwl_read_eeprom()