1 // SPDX-License-Identifier: GPL-2.0+
4  * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
17  * Regions can be write/erase protected.
21  * The flash is presented to u-boot with each region being a sector,
23  * Each sector can be hardware protected (protect on/off).
27  * by u-Boot commands.
43  * do a read-modify-write for partially programmed pages
73 	if ((readl(&dbu->cidr) & AT91_DBU_CID_ARCH_MASK) != AT91_DBU_CID_ARCH_9XExx) {  in flash_init()
79 	writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_GETD, &eefc->fcr);  in flash_init()
80 	while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0)  in flash_init()
82 	id = readl(&eefc->frr);		/* word 0 */  in flash_init()
83 	size = readl(&eefc->frr);	/* word 1 */  in flash_init()
84 	pagesize = readl(&eefc->frr);	/* word 2 */  in flash_init()
85 	nplanes = readl(&eefc->frr);	/* word 3 */  in flash_init()
86 	planesize = readl(&eefc->frr);	/* word 4 */  in flash_init()
90 		tmp = readl(&eefc->frr);	/* words 5..4+nplanes-1 */  in flash_init()
92 	nlocks = readl(&eefc->frr);	/* word 4+nplanes */  in flash_init()
107 		tmp = readl(&eefc->frr);	/* words 4+nplanes+1.. */  in flash_init()
109 		flash_info[0].protect[i] = 0;  in flash_init()
114 	writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_GLB, &eefc->fcr);  in flash_init()
115 	while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0)  in flash_init()
119 			tmp = readl(&eefc->frr);  in flash_init()
120 		flash_info[0].protect[i] = (tmp >> (i%32)) & 1;  in flash_init()
123 			flash_info[0].protect[i] = 1;  in flash_init()
135 	print_size(info->size, " in ");  in flash_print_info()
136 	printf("%d Sectors\n", info->sector_count);  in flash_print_info()
139 	for (i=0; i<info->sector_count; ++i) {  in flash_print_info()
143 			info->start[i],  in flash_print_info()
144 			info->protect[i] ? " (RO)" : "     "  in flash_print_info()
154 	u32 pagenum = (info->start[sector]-ATMEL_BASE_FLASH)/pagesize;  in flash_real_protect()
157 	debug("protect sector=%ld prot=%d\n", sector, prot);  in flash_real_protect()
170 			(pagenum << AT91_EEFC_FCR_FARG_SHIFT), &eefc->fcr);  in flash_real_protect()
173 			(pagenum << AT91_EEFC_FCR_FARG_SHIFT), &eefc->fcr);  in flash_real_protect()
175 	while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0)  in flash_real_protect()
177 	/* now re-read the protection information for all regions */  in flash_real_protect()
178 	writel(AT91_EEFC_FCR_KEY | AT91_EEFC_FCR_FCMD_GLB, &eefc->fcr);  in flash_real_protect()
179 	while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0)  in flash_real_protect()
181 	for (i=0; i<info->sector_count; i++) {  in flash_real_protect()
183 			tmp = readl(&eefc->frr);  in flash_real_protect()
184 		info->protect[i] = (tmp >> (i%32)) & 1;  in flash_real_protect()
193 	debug("erase+write page=%u\n", pagenum);  in erase_write_page()
195 	/* give erase and write page command */  in erase_write_page()
197 		(pagenum << AT91_EEFC_FCR_FARG_SHIFT), &eefc->fcr);  in erase_write_page()
198 	while ((readl(&eefc->fsr) & AT91_EEFC_FSR_FRDY) == 0)  in erase_write_page()
201 	return readl(&eefc->fsr)  in erase_write_page()
214  * 0 - OK
215  * 1 - write timeout
224 	debug("write src=%08lx addr=%08lx cnt=%lx\n",  in write_buff()
230 			"        write aborted\n", addr);  in write_buff()
235 	pagenum = (addr-ATMEL_BASE_FLASH)/pagesize;  in write_buff()
241 		while (i--)  in write_buff()
243 		/* write page */  in write_buff()
248 			cnt -= pagesize;  in write_buff()