mtd/spi-nor/xilinx.c

1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/mtd/spi-nor.h>
12 	/* Xilinx S3AN Internal Flash */
21  * This code converts an address to the Default Address Mode, that has non
23  * mode supported by Xilinx tools, it can access the whole flash area and
24  * changing over to the Power-of-two mode is irreversible and corrupts the
33 	offset = addr % nor->page_size;  in s3an_convert_addr()
34 	page = addr / nor->page_size;  in s3an_convert_addr()
35 	page <<= (nor->page_size > 512) ? 10 : 9;  in s3an_convert_addr()
45 	ret = spi_nor_xread_sr(nor, nor->bouncebuf);  in xilinx_nor_setup()
49 	nor->erase_opcode = SPINOR_OP_XSE;  in xilinx_nor_setup()
50 	nor->program_opcode = SPINOR_OP_XPP;  in xilinx_nor_setup()
51 	nor->read_opcode = SPINOR_OP_READ;  in xilinx_nor_setup()
52 	nor->flags |= SNOR_F_NO_OP_CHIP_ERASE;  in xilinx_nor_setup()
65 	if (nor->bouncebuf[0] & XSR_PAGESIZE) {  in xilinx_nor_setup()
66 		/* Flash in Power of 2 mode */  in xilinx_nor_setup()
67 		nor->page_size = (nor->page_size == 264) ? 256 : 512;  in xilinx_nor_setup()
68 		nor->mtd.writebufsize = nor->page_size;  in xilinx_nor_setup()
69 		nor->mtd.size = 8 * nor->page_size * nor->info->n_sectors;  in xilinx_nor_setup()
70 		nor->mtd.erasesize = 8 * nor->page_size;  in xilinx_nor_setup()
72 		/* Flash in Default addressing mode */  in xilinx_nor_setup()
73 		nor->params->convert_addr = s3an_convert_addr;  in xilinx_nor_setup()
74 		nor->mtd.erasesize = nor->info->sector_size;  in xilinx_nor_setup()
82 	nor->params->setup = xilinx_nor_setup;  in xilinx_post_sfdp_fixups()