1 // SPDX-License-Identifier: GPL-2.0+
6  *	Copyright (C) 2005-2009 Samsung Electronics
17  * - 2048b page, 128k erase block.
18  * - 4096b page, 256k erase block.
28 #define onenand_sector_address(page)		(page << 2)  argument
73 			density_mask = 1 << (18 + density - ffs(size));  in onenand_spl_get_geometry()
81 static int onenand_spl_read_page(uint32_t block, uint32_t page, uint32_t *buf,  in onenand_spl_read_page()  argument
85 	uint32_t offset;  in onenand_spl_read_page()  local
93 	onenand_writew(onenand_sector_address(page),  in onenand_spl_read_page()
107 	if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff))  in onenand_spl_read_page()
110 	for (offset = 0; offset < pagesize; offset += 4)  in onenand_spl_read_page()
111 		buf[offset / 4] = readl(addr + offset);  in onenand_spl_read_page()
117 /* Temporary storage for non page aligned and non page sized reads. */
121  * onenand_spl_read_block - Read data from physical eraseblock into a buffer
123  * @offset:	Data offset from the start of @peb
128  *	@offset + @len are not allowed to be larger than a physical
131 int onenand_spl_read_block(int block, int offset, int len, void *dst)  in onenand_spl_read_block()  argument
133 	int page, read;  in onenand_spl_read_block()  local
139 	/* Calculate the page number */  in onenand_spl_read_block()
140 	page = offset / psize;  in onenand_spl_read_block()
141 	/* Offset to the start of a flash page */  in onenand_spl_read_block()
142 	offset = offset % psize;  in onenand_spl_read_block()
146 		 * Non page aligned reads go to the scratch buffer.  in onenand_spl_read_block()
147 		 * Page aligned reads go directly to the destination.  in onenand_spl_read_block()
149 		if (offset || len < psize) {  in onenand_spl_read_block()
150 			onenand_spl_read_page(block, page,  in onenand_spl_read_block()
152 			read = min(len, psize - offset);  in onenand_spl_read_block()
153 			memcpy(dst, scratch_buf + offset, read);  in onenand_spl_read_block()
154 			offset = 0;  in onenand_spl_read_block()
156 			onenand_spl_read_page(block, page, dst, psize);  in onenand_spl_read_block()
159 		page++;  in onenand_spl_read_block()
160 		len -= read;  in onenand_spl_read_block()
172 	uint32_t page, rpage;  in onenand_spl_load_image()  local
179 	 * The page can be either 2k or 4k, avoid using DIV_ROUND_UP to avoid  in onenand_spl_load_image()
183 		page = offs / 2048;  in onenand_spl_load_image()
184 		to_page = page + DIV_ROUND_UP(size, 2048);  in onenand_spl_load_image()
186 		page = offs / 4096;  in onenand_spl_load_image()
187 		to_page = page + DIV_ROUND_UP(size, 4096);  in onenand_spl_load_image()
190 	for (; page <= to_page; page++) {  in onenand_spl_load_image()
191 		block = page / ONENAND_PAGES_PER_BLOCK;  in onenand_spl_load_image()
192 		rpage = page & (ONENAND_PAGES_PER_BLOCK - 1);  in onenand_spl_load_image()
195 			page += ONENAND_PAGES_PER_BLOCK - 1;  in onenand_spl_load_image()