94 static int iwl_eeprom_acquire_semaphore(struct iwl_trans *trans)  in iwl_eeprom_acquire_semaphore()  argument
101 		iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,  in iwl_eeprom_acquire_semaphore()
105 		ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,  in iwl_eeprom_acquire_semaphore()
110 			IWL_DEBUG_EEPROM(trans->dev,  in iwl_eeprom_acquire_semaphore()
120 static void iwl_eeprom_release_semaphore(struct iwl_trans *trans)  in iwl_eeprom_release_semaphore()  argument
122 	iwl_clear_bit(trans, CSR_HW_IF_CONFIG_REG,  in iwl_eeprom_release_semaphore()
126 static int iwl_eeprom_verify_signature(struct iwl_trans *trans, bool nvm_is_otp)  in iwl_eeprom_verify_signature()  argument
128 	u32 gp = iwl_read32(trans, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;  in iwl_eeprom_verify_signature()
130 	IWL_DEBUG_EEPROM(trans->dev, "EEPROM signature=0x%08x\n", gp);  in iwl_eeprom_verify_signature()
135 			IWL_ERR(trans, "EEPROM with bad signature: 0x%08x\n",  in iwl_eeprom_verify_signature()
143 			IWL_ERR(trans, "OTP with bad signature: 0x%08x\n", gp);  in iwl_eeprom_verify_signature()
149 		IWL_ERR(trans,  in iwl_eeprom_verify_signature()
162 static void iwl_set_otp_access_absolute(struct iwl_trans *trans)  in iwl_set_otp_access_absolute()  argument
164 	iwl_read32(trans, CSR_OTP_GP_REG);  in iwl_set_otp_access_absolute()
166 	iwl_clear_bit(trans, CSR_OTP_GP_REG,  in iwl_set_otp_access_absolute()
170 static int iwl_nvm_is_otp(struct iwl_trans *trans)  in iwl_nvm_is_otp()  argument
175 	switch (trans->hw_rev & CSR_HW_REV_TYPE_MSK) {  in iwl_nvm_is_otp()
177 		IWL_ERR(trans, "Unknown hardware type\n");  in iwl_nvm_is_otp()
185 		otpgp = iwl_read32(trans, CSR_OTP_GP_REG);  in iwl_nvm_is_otp()
192 static int iwl_init_otp_access(struct iwl_trans *trans)  in iwl_init_otp_access()  argument
196 	ret = iwl_finish_nic_init(trans, trans->trans_cfg);  in iwl_init_otp_access()
200 	iwl_set_bits_prph(trans, APMG_PS_CTRL_REG,  in iwl_init_otp_access()
203 	iwl_clear_bits_prph(trans, APMG_PS_CTRL_REG,  in iwl_init_otp_access()
210 	if (trans->trans_cfg->base_params->shadow_ram_support)  in iwl_init_otp_access()
211 		iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,  in iwl_init_otp_access()
217 static int iwl_read_otp_word(struct iwl_trans *trans, u16 addr,  in iwl_read_otp_word()  argument
224 	iwl_write32(trans, CSR_EEPROM_REG,  in iwl_read_otp_word()
226 	ret = iwl_poll_bit(trans, CSR_EEPROM_REG,  in iwl_read_otp_word()
231 		IWL_ERR(trans, "Time out reading OTP[%d]\n", addr);  in iwl_read_otp_word()
234 	r = iwl_read32(trans, CSR_EEPROM_REG);  in iwl_read_otp_word()
236 	otpgp = iwl_read32(trans, CSR_OTP_GP_REG);  in iwl_read_otp_word()
240 		iwl_set_bit(trans, CSR_OTP_GP_REG,  in iwl_read_otp_word()
242 		IWL_ERR(trans, "Uncorrectable OTP ECC error, abort OTP read\n");  in iwl_read_otp_word()
248 		iwl_set_bit(trans, CSR_OTP_GP_REG,  in iwl_read_otp_word()
250 		IWL_ERR(trans, "Correctable OTP ECC error, continue read\n");  in iwl_read_otp_word()
259 static bool iwl_is_otp_empty(struct iwl_trans *trans)  in iwl_is_otp_empty()  argument
266 	if (!iwl_read_otp_word(trans, next_link_addr, &link_value)) {  in iwl_is_otp_empty()
268 			IWL_ERR(trans, "OTP is empty\n");  in iwl_is_otp_empty()
272 		IWL_ERR(trans, "Unable to read first block of OTP list.\n");  in iwl_is_otp_empty()
289 static int iwl_find_otp_image(struct iwl_trans *trans,  in iwl_find_otp_image()  argument
297 	iwl_set_otp_access_absolute(trans);  in iwl_find_otp_image()
300 	if (iwl_is_otp_empty(trans))  in iwl_find_otp_image()
314 		IWL_DEBUG_EEPROM(trans->dev, "OTP blocks %d addr 0x%x\n",  in iwl_find_otp_image()
316 		if (iwl_read_otp_word(trans, next_link_addr, &link_value))  in iwl_find_otp_image()
331 	} while (usedblocks <= trans->trans_cfg->base_params->max_ll_items);  in iwl_find_otp_image()
334 	IWL_DEBUG_EEPROM(trans->dev, "OTP has no valid blocks\n");  in iwl_find_otp_image()
346 int iwl_read_eeprom(struct iwl_trans *trans, u8 **eeprom, size_t *eeprom_size)  in iwl_read_eeprom()  argument
349 	u32 gp = iwl_read32(trans, CSR_EEPROM_GP);  in iwl_read_eeprom()
360 	nvm_is_otp = iwl_nvm_is_otp(trans);  in iwl_read_eeprom()
364 	sz = trans->trans_cfg->base_params->eeprom_size;  in iwl_read_eeprom()
365 	IWL_DEBUG_EEPROM(trans->dev, "NVM size = %d\n", sz);  in iwl_read_eeprom()
371 	ret = iwl_eeprom_verify_signature(trans, nvm_is_otp);  in iwl_read_eeprom()
373 		IWL_ERR(trans, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);  in iwl_read_eeprom()
378 	ret = iwl_eeprom_acquire_semaphore(trans);  in iwl_read_eeprom()
380 		IWL_ERR(trans, "Failed to acquire EEPROM semaphore.\n");  in iwl_read_eeprom()
385 		ret = iwl_init_otp_access(trans);  in iwl_read_eeprom()
387 			IWL_ERR(trans, "Failed to initialize OTP access.\n");  in iwl_read_eeprom()
391 		iwl_write32(trans, CSR_EEPROM_GP,  in iwl_read_eeprom()
392 			    iwl_read32(trans, CSR_EEPROM_GP) &  in iwl_read_eeprom()
395 		iwl_set_bit(trans, CSR_OTP_GP_REG,  in iwl_read_eeprom()
399 		if (!trans->trans_cfg->base_params->shadow_ram_support) {  in iwl_read_eeprom()
400 			ret = iwl_find_otp_image(trans, &validblockaddr);  in iwl_read_eeprom()
408 			ret = iwl_read_otp_word(trans, addr, &eeprom_data);  in iwl_read_eeprom()
419 			iwl_write32(trans, CSR_EEPROM_REG,  in iwl_read_eeprom()
422 			ret = iwl_poll_bit(trans, CSR_EEPROM_REG,  in iwl_read_eeprom()
427 				IWL_ERR(trans,  in iwl_read_eeprom()
431 			r = iwl_read32(trans, CSR_EEPROM_REG);  in iwl_read_eeprom()
436 	IWL_DEBUG_EEPROM(trans->dev, "NVM Type: %s\n",  in iwl_read_eeprom()
439 	iwl_eeprom_release_semaphore(trans);  in iwl_read_eeprom()
446 	iwl_eeprom_release_semaphore(trans);  in iwl_read_eeprom()