X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fmtd%2Fspi%2Framtron.c;h=a23032cca58df0fdc2f304ce8aabaef253bd54fd;hb=746667f1e56bf08d03e66a178df3c4f4f6c806e1;hp=099978149696968452e2851530687f6b358d2c4f;hpb=b98b611502f5e0a85a1f8e15cf46c470cb105614;p=u-boot diff --git a/drivers/mtd/spi/ramtron.c b/drivers/mtd/spi/ramtron.c index 0999781496..a23032cca5 100644 --- a/drivers/mtd/spi/ramtron.c +++ b/drivers/mtd/spi/ramtron.c @@ -2,23 +2,7 @@ * (C) Copyright 2010 * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ /* @@ -51,8 +35,9 @@ #include #include +#include #include -#include "spi_flash_internal.h" +#include "sf_internal.h" /* * Properties of supported FRAMs @@ -230,7 +215,8 @@ static int ramtron_erase(struct spi_flash *flash, u32 offset, size_t len) * nore: we are called here with idcode pointing to the first non-0x7f byte * already! */ -struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode) +static struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, + u8 *idcode) { const struct ramtron_spi_fram_params *params; struct ramtron_spi_fram *sn; @@ -246,7 +232,8 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode) /* JEDEC conformant RAMTRON id */ for (i = 0; i < ARRAY_SIZE(ramtron_spi_fram_table); i++) { params = &ramtron_spi_fram_table[i]; - if (idcode[1] == params->id1 && idcode[2] == params->id2) + if (idcode[1] == params->id1 && + idcode[2] == params->id2) goto found; } break; @@ -267,7 +254,8 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode) /* now find the device */ for (i = 0; i < ARRAY_SIZE(ramtron_spi_fram_table); i++) { params = &ramtron_spi_fram_table[i]; - if (!strcmp(params->name, CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC)) + if (!strcmp(params->name, + CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC)) goto found; } debug("SF: Unsupported non-JEDEC RAMTRON device " @@ -280,7 +268,7 @@ struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode) /* arriving here means no method has found a device we can handle */ debug("SF/ramtron: unsupported device id0=%02x id1=%02x id2=%02x\n", - idcode[0], idcode[1], idcode[2]); + idcode[0], idcode[1], idcode[2]); return NULL; found: @@ -291,8 +279,6 @@ found: } sn->params = params; - sn->flash.spi = spi; - sn->flash.name = params->name; sn->flash.write = ramtron_write; sn->flash.read = ramtron_read; @@ -301,3 +287,118 @@ found: return &sn->flash; } + +/* + * The following table holds all device probe functions + * (All flashes are removed and implemented a common probe at + * spi_flash_probe.c) + * + * shift: number of continuation bytes before the ID + * idcode: the expected IDCODE or 0xff for non JEDEC devices + * probe: the function to call + * + * Non JEDEC devices should be ordered in the table such that + * the probe functions with best detection algorithms come first. + * + * Several matching entries are permitted, they will be tried + * in sequence until a probe function returns non NULL. + * + * IDCODE_CONT_LEN may be redefined if a device needs to declare a + * larger "shift" value. IDCODE_PART_LEN generally shouldn't be + * changed. This is the max number of bytes probe functions may + * examine when looking up part-specific identification info. + * + * Probe functions will be given the idcode buffer starting at their + * manu id byte (the "idcode" in the table below). In other words, + * all of the continuation bytes will be skipped (the "shift" below). + */ +#define IDCODE_CONT_LEN 0 +#define IDCODE_PART_LEN 5 +static const struct { + const u8 shift; + const u8 idcode; + struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode); +} flashes[] = { + /* Keep it sorted by define name */ +#ifdef CONFIG_SPI_FRAM_RAMTRON + { 6, 0xc2, spi_fram_probe_ramtron, }, +# undef IDCODE_CONT_LEN +# define IDCODE_CONT_LEN 6 +#endif +#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC + { 0, 0xff, spi_fram_probe_ramtron, }, +#endif +}; +#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN) + +struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int spi_mode) +{ + struct spi_slave *spi; + struct spi_flash *flash = NULL; + int ret, i, shift; + u8 idcode[IDCODE_LEN], *idp; + + spi = spi_setup_slave(bus, cs, max_hz, spi_mode); + if (!spi) { + printf("SF: Failed to set up slave\n"); + return NULL; + } + + ret = spi_claim_bus(spi); + if (ret) { + debug("SF: Failed to claim SPI bus: %d\n", ret); + goto err_claim_bus; + } + + /* Read the ID codes */ + ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode)); + if (ret) + goto err_read_id; + +#ifdef DEBUG + printf("SF: Got idcodes\n"); + print_buffer(0, idcode, 1, sizeof(idcode), 0); +#endif + + /* count the number of continuation bytes */ + for (shift = 0, idp = idcode; + shift < IDCODE_CONT_LEN && *idp == 0x7f; + ++shift, ++idp) + continue; + + /* search the table for matches in shift and id */ + for (i = 0; i < ARRAY_SIZE(flashes); ++i) + if (flashes[i].shift == shift && flashes[i].idcode == *idp) { + /* we have a match, call probe */ + flash = flashes[i].probe(spi, idp); + if (flash) + break; + } + + if (!flash) { + printf("SF: Unsupported manufacturer %02x\n", *idp); + goto err_manufacturer_probe; + } + + printf("SF: Detected %s with total size ", flash->name); + print_size(flash->size, ""); + puts("\n"); + + spi_release_bus(spi); + + return flash; + +err_manufacturer_probe: +err_read_id: + spi_release_bus(spi); +err_claim_bus: + spi_free_slave(spi); + return NULL; +} + +void spi_flash_free(struct spi_flash *flash) +{ + spi_free_slave(flash->spi); + free(flash); +}