14 #include <linux/mtd/nand.h>
15 #include <linux/mtd/nand-ecc-sw-bch.h>
19  * @nand: NAND device
23 int nand_ecc_sw_bch_calculate(struct nand_device *nand,  in nand_ecc_sw_bch_calculate()  argument
26 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_calculate()
30 	bch_encode(engine_conf->bch, buf, nand->ecc.ctx.conf.step_size, code);  in nand_ecc_sw_bch_calculate()
42  * @nand: NAND device
49 int nand_ecc_sw_bch_correct(struct nand_device *nand, unsigned char *buf,  in nand_ecc_sw_bch_correct()  argument
52 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_correct()
53 	unsigned int step_size = nand->ecc.ctx.conf.step_size;  in nand_ecc_sw_bch_correct()
80  * @nand: NAND device
82 static void nand_ecc_sw_bch_cleanup(struct nand_device *nand)  in nand_ecc_sw_bch_cleanup()  argument
84 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_cleanup()
93  * @nand: NAND device
95  * Returns: a pointer to a new NAND BCH control structure, or NULL upon failure
97  * Initialize NAND BCH error correction. @nand.ecc parameters 'step_size' and
108 static int nand_ecc_sw_bch_init(struct nand_device *nand)  in nand_ecc_sw_bch_init()  argument
110 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_init()
111 	unsigned int eccsize = nand->ecc.ctx.conf.step_size;  in nand_ecc_sw_bch_init()
165 	nand_ecc_sw_bch_cleanup(nand);  in nand_ecc_sw_bch_init()
170 int nand_ecc_sw_bch_init_ctx(struct nand_device *nand)  in nand_ecc_sw_bch_init_ctx()  argument
172 	struct nand_ecc_props *conf = &nand->ecc.ctx.conf;  in nand_ecc_sw_bch_init_ctx()
173 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nand_ecc_sw_bch_init_ctx()
178 	/* Only large page NAND chips may use BCH */  in nand_ecc_sw_bch_init_ctx()
180 		pr_err("BCH cannot be used with small page NAND chips\n");  in nand_ecc_sw_bch_init_ctx()
189 	conf->step_size = nand->ecc.user_conf.step_size;  in nand_ecc_sw_bch_init_ctx()
190 	conf->strength = nand->ecc.user_conf.strength;  in nand_ecc_sw_bch_init_ctx()
210 	if (nand->ecc.user_conf.flags & NAND_ECC_MAXIMIZE_STRENGTH) {  in nand_ecc_sw_bch_init_ctx()
234 	ret = nand_ecc_init_req_tweaking(&engine_conf->req_ctx, nand);  in nand_ecc_sw_bch_init_ctx()
246 	nand->ecc.ctx.priv = engine_conf;  in nand_ecc_sw_bch_init_ctx()
247 	nand->ecc.ctx.nsteps = nsteps;  in nand_ecc_sw_bch_init_ctx()
248 	nand->ecc.ctx.total = nsteps * code_size;  in nand_ecc_sw_bch_init_ctx()
250 	ret = nand_ecc_sw_bch_init(nand);  in nand_ecc_sw_bch_init_ctx()
256 	    nand->ecc.ctx.nsteps * engine_conf->code_size) {  in nand_ecc_sw_bch_init_ctx()
265 	nand_ecc_sw_bch_cleanup(nand);  in nand_ecc_sw_bch_init_ctx()
277 void nand_ecc_sw_bch_cleanup_ctx(struct nand_device *nand)  in nand_ecc_sw_bch_cleanup_ctx()  argument
279 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_cleanup_ctx()
282 		nand_ecc_sw_bch_cleanup(nand);  in nand_ecc_sw_bch_cleanup_ctx()
291 static int nand_ecc_sw_bch_prepare_io_req(struct nand_device *nand,  in nand_ecc_sw_bch_prepare_io_req()  argument
294 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_prepare_io_req()
295 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nand_ecc_sw_bch_prepare_io_req()
296 	int eccsize = nand->ecc.ctx.conf.step_size;  in nand_ecc_sw_bch_prepare_io_req()
298 	int eccsteps = nand->ecc.ctx.nsteps;  in nand_ecc_sw_bch_prepare_io_req()
299 	int total = nand->ecc.ctx.total;  in nand_ecc_sw_bch_prepare_io_req()
322 		nand_ecc_sw_bch_calculate(nand, data, &ecccalc[i]);  in nand_ecc_sw_bch_prepare_io_req()
328 static int nand_ecc_sw_bch_finish_io_req(struct nand_device *nand,  in nand_ecc_sw_bch_finish_io_req()  argument
331 	struct nand_ecc_sw_bch_conf *engine_conf = nand->ecc.ctx.priv;  in nand_ecc_sw_bch_finish_io_req()
332 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nand_ecc_sw_bch_finish_io_req()
333 	int eccsize = nand->ecc.ctx.conf.step_size;  in nand_ecc_sw_bch_finish_io_req()
334 	int total = nand->ecc.ctx.total;  in nand_ecc_sw_bch_finish_io_req()
336 	int eccsteps = nand->ecc.ctx.nsteps;  in nand_ecc_sw_bch_finish_io_req()
365 		nand_ecc_sw_bch_calculate(nand, data, &ecccalc[i]);  in nand_ecc_sw_bch_finish_io_req()
368 	for (eccsteps = nand->ecc.ctx.nsteps, i = 0, data = req->databuf.in;  in nand_ecc_sw_bch_finish_io_req()
371 		int stat =  nand_ecc_sw_bch_correct(nand, data,  in nand_ecc_sw_bch_finish_io_req()
406 MODULE_DESCRIPTION("NAND software BCH ECC support");