12  * This file contains all ONFI helpers.
53 	 * Use the Change Read Column command to skip the ONFI param pages and  in nand_flash_detect_ext_param_page()
71 	 * Do not strictly follow the ONFI spec, maybe changed in future.  in nand_flash_detect_ext_param_page()
142  * Check if the NAND chip is ONFI compliant, returns 1 if it is, 0 otherwise.
150 	struct onfi_params *onfi;  in nand_onfi_detect()  local
159 	/* Try ONFI for unknown chip or LP */  in nand_onfi_detect()
161 	if (ret || strncmp(id, "ONFI", 4))  in nand_onfi_detect()
164 	/* ONFI chip: allocate a buffer to hold its parameter page */  in nand_onfi_detect()
203 		pr_warn("Could not find a valid ONFI parameter page, trying bit-wise majority to recover it\n");  in nand_onfi_detect()
209 			pr_err("ONFI parameter recovery failed, aborting\n");  in nand_onfi_detect()
233 		pr_info("unsupported ONFI version: %d\n", val);  in nand_onfi_detect()
291 		/* The Extended Parameter Page is supported since ONFI 2.1. */  in nand_onfi_detect()
293 			pr_warn("Failed to detect ONFI extended param page\n");  in nand_onfi_detect()
295 		pr_warn("Could not retrieve ONFI ECC requirements\n");  in nand_onfi_detect()
307 	onfi = kzalloc(sizeof(*onfi), GFP_KERNEL);  in nand_onfi_detect()
308 	if (!onfi) {  in nand_onfi_detect()
313 	onfi->version = onfi_version;  in nand_onfi_detect()
314 	onfi->tPROG = le16_to_cpu(p->t_prog);  in nand_onfi_detect()
315 	onfi->tBERS = le16_to_cpu(p->t_bers);  in nand_onfi_detect()
316 	onfi->tR = le16_to_cpu(p->t_r);  in nand_onfi_detect()
317 	onfi->tCCS = le16_to_cpu(p->t_ccs);  in nand_onfi_detect()
318 	onfi->fast_tCAD = le16_to_cpu(p->nvddr_nvddr2_features) & BIT(0);  in nand_onfi_detect()
319 	onfi->sdr_timing_modes = le16_to_cpu(p->sdr_timing_modes);  in nand_onfi_detect()
321 		onfi->nvddr_timing_modes = le16_to_cpu(p->nvddr_timing_modes);  in nand_onfi_detect()
322 	onfi->vendor_revision = le16_to_cpu(p->vendor_revision);  in nand_onfi_detect()
323 	memcpy(onfi->vendor, p->vendor, sizeof(p->vendor));  in nand_onfi_detect()
324 	chip->parameters.onfi = onfi;  in nand_onfi_detect()
326 	/* Identification done, free the full ONFI parameter page and exit */  in nand_onfi_detect()