1 // SPDX-License-Identifier: GPL-2.0+
81  * smi_wait_xfer_finish - Wait until TFF is set in status register
91 		if (readl(&smicntl->smi_sr) & TFF)  in smi_wait_xfer_finish()
98 	return -1;  in smi_wait_xfer_finish()
102  * smi_read_id - Read flash id
112 	writel(readl(&smicntl->smi_cr1) | SW_MODE, &smicntl->smi_cr1);  in smi_read_id()
113 	writel(READ_ID, &smicntl->smi_tr);  in smi_read_id()
115 	       &smicntl->smi_cr2);  in smi_read_id()
118 		return -EIO;  in smi_read_id()
120 	value = (readl(&smicntl->smi_rr) & 0x00FFFFFF);  in smi_read_id()
122 	writel(readl(&smicntl->smi_sr) & ~TFF, &smicntl->smi_sr);  in smi_read_id()
123 	writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);  in smi_read_id()
129  * flash_get_size - Detect the SMI flash by reading the ID.
149 	/* Matches chip-id to entire list of 'serial-nor flash' ids */  in flash_get_size()
152 			info->size = flash_devices[i].size_in_bytes;  in flash_get_size()
153 			info->flash_id = value;  in flash_get_size()
154 			info->start[0] = base;  in flash_get_size()
155 			info->sector_count =  in flash_get_size()
156 					info->size/flash_devices[i].sectorsize;  in flash_get_size()
158 			return info->size;  in flash_get_size()
166  * smi_read_sr - Read status register of SMI
177 	ctrlreg1 = readl(&smicntl->smi_cr1);  in smi_read_sr()
180 	writel(readl(&smicntl->smi_cr1) & ~(SW_MODE | WB_MODE),  in smi_read_sr()
181 	       &smicntl->smi_cr1);  in smi_read_sr()
184 	writel((bank << BANKSEL_SHIFT) | RD_STATUS_REG, &smicntl->smi_cr2);  in smi_read_sr()
187 		return -1;  in smi_read_sr()
189 	val = readl(&smicntl->smi_sr);  in smi_read_sr()
192 	writel(ctrlreg1, &smicntl->smi_cr1);  in smi_read_sr()
198  * smi_wait_till_ready - Wait till last operation is over.
202  * This routine checks for WIP(write in progress)bit in Status register(SMSR-b0)
203  * The routine checks for #timeout loops, each at interval of 1 milli-second.
212 	   but potentially three seconds (!) after page erase. */  in smi_wait_till_ready()
220 	} while (timeout--);  in smi_wait_till_ready()
223 	return -EIO;  in smi_wait_till_ready()
227  * smi_write_enable - Enable the flash to do write operation
241 	ctrlreg1 = readl(&smicntl->smi_cr1);  in smi_write_enable()
244 	writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);  in smi_write_enable()
247 	writel((bank << BANKSEL_SHIFT) | WE, &smicntl->smi_cr2);  in smi_write_enable()
250 		return -1;  in smi_write_enable()
253 	writel(ctrlreg1, &smicntl->smi_cr1);  in smi_write_enable()
265 	return -1;  in smi_write_enable()
269  * smi_init - SMI initialization routine
277 	       &smicntl->smi_cr1);  in smi_init()
281  * smi_sector_erase - Erase flash sector
294 	switch (info->start[0]) {  in smi_sector_erase()
308 		return -1;  in smi_sector_erase()
311 	sect_add = sector * (info->size / info->sector_count);  in smi_sector_erase()
314 	writel(readl(&smicntl->smi_sr) & ~(ERF1 | ERF2), &smicntl->smi_sr);  in smi_sector_erase()
318 		return -EBUSY;  in smi_sector_erase()
322 		return -EIO;  in smi_sector_erase()
325 	writel(readl(&smicntl->smi_cr1) | SW_MODE, &smicntl->smi_cr1);  in smi_sector_erase()
328 	writel(instruction, &smicntl->smi_tr);  in smi_sector_erase()
330 		       &smicntl->smi_cr2);  in smi_sector_erase()
332 		return -EIO;  in smi_sector_erase()
335 		return -EBUSY;  in smi_sector_erase()
338 	writel(readl(&smicntl->smi_cr1) & ~SW_MODE,  in smi_sector_erase()
339 		       &smicntl->smi_cr1);  in smi_sector_erase()
345  * smi_write - Write to SMI flash
375 		return -1;  in smi_write()
379 		return -EBUSY;  in smi_write()
382 	writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);  in smi_write()
385 		return -EIO;  in smi_write()
392 				return -EBUSY;  in smi_write()
395 				return -EIO;  in smi_write()
411 		if ((readl(&smicntl->smi_sr) & (ERF1 | ERF2)))  in smi_write()
412 			return -EIO;  in smi_write()
416 		return -EBUSY;  in smi_write()
418 	writel(readl(&smicntl->smi_sr) & ~(WCF), &smicntl->smi_sr);  in smi_write()
424  * write_buff - Write to SMI flash
435 			 length, info->start[0]);  in write_buff()
439  * flash_init - SMI flash initialization
458 			    flash_info[j].start[i - 1] +  in flash_init()
459 			    flash_info->size / flash_info->sector_count;  in flash_init()
467  * flash_print_info - Print SMI flash information
474 	if (info->flash_id == FLASH_UNKNOWN) {  in flash_print_info()
479 	if (info->size >= 0x100000)  in flash_print_info()
481 		       info->size >> 20, info->sector_count);  in flash_print_info()
484 		       info->size >> 10, info->sector_count);  in flash_print_info()
487 	for (i = 0; i < info->sector_count; ++i) {  in flash_print_info()
496 		size = (info->size) / (info->sector_count);  in flash_print_info()
497 		flash = (u32 *) info->start[i];  in flash_print_info()
500 		while ((size--) && (*flash++ == ~0))  in flash_print_info()
513 		       info->start[i],  in flash_print_info()
514 		       erased ? " E" : "  ", info->protect[i] ? "RO " : "   ");  in flash_print_info()
519 		       info->start[i], info->protect[i] ? " (RO)  " : "     ");  in flash_print_info()
527  * flash_erase - Erase SMI flash
538 		puts("- no sectors to erase\n");  in flash_erase()
543 		if (info->protect[sect])  in flash_erase()
547 		printf("- Warning: %d protected sectors will not be erased!\n",  in flash_erase()
554 		if (info->protect[sect] == 0) {  in flash_erase()