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Diffstat (limited to 'drivers/mtd/spi/macronix.c')
-rw-r--r--drivers/mtd/spi/macronix.c312
1 files changed, 312 insertions, 0 deletions
diff --git a/drivers/mtd/spi/macronix.c b/drivers/mtd/spi/macronix.c
new file mode 100644
index 0000000..9464c84
--- /dev/null
+++ b/drivers/mtd/spi/macronix.c
@@ -0,0 +1,312 @@
+/*
+ * Copyright 2009(C) Marvell International Ltd. and its affiliates
+ * Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * Based on drivers/mtd/spi/stmicro.c
+ *
+ * Copyright 2008, Network Appliance Inc.
+ * Jason McMullan <mcmullan@netapp.com>
+ *
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <spi_flash.h>
+
+#include "spi_flash_internal.h"
+
+/* MX25xx-specific commands */
+#define CMD_MX25XX_WREN 0x06 /* Write Enable */
+#define CMD_MX25XX_WRDI 0x04 /* Write Disable */
+#define CMD_MX25XX_RDSR 0x05 /* Read Status Register */
+#define CMD_MX25XX_WRSR 0x01 /* Write Status Register */
+#define CMD_MX25XX_READ 0x03 /* Read Data Bytes */
+#define CMD_MX25XX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
+#define CMD_MX25XX_PP 0x02 /* Page Program */
+#define CMD_MX25XX_SE 0x20 /* Sector Erase */
+#define CMD_MX25XX_BE 0xD8 /* Block Erase */
+#define CMD_MX25XX_CE 0xc7 /* Chip Erase */
+#define CMD_MX25XX_DP 0xb9 /* Deep Power-down */
+#define CMD_MX25XX_RES 0xab /* Release from DP, and Read Signature */
+
+#define MXIC_ID_MX2516 0x15
+#define MXIC_ID_MX2520 0x12
+#define MXIC_ID_MX2532 0x16
+#define MXIC_ID_MX2540 0x13
+#define MXIC_ID_MX2564 0x17
+#define MXIC_ID_MX2580 0x14
+#define MXIC_ID_MX25128 0x18
+
+#define MACRONIX_SR_WIP (1 << 0) /* Write-in-Progress */
+
+struct macronix_spi_flash_params {
+ u8 idcode1;
+ u16 page_size;
+ u16 pages_per_sector;
+ u16 sectors_per_block;
+ u16 nr_blocks;
+ const char *name;
+};
+
+struct macronix_spi_flash {
+ struct spi_flash flash;
+ const struct macronix_spi_flash_params *params;
+};
+
+static inline struct macronix_spi_flash *to_macronix_spi_flash(struct spi_flash
+ *flash)
+{
+ return container_of(flash, struct macronix_spi_flash, flash);
+}
+
+static const struct macronix_spi_flash_params macronix_spi_flash_table[] = {
+ {
+ .idcode1 = MXIC_ID_MX25128,
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .sectors_per_block = 16,
+ .nr_blocks = 256,
+ .name = "MX25L12805D",
+ },
+};
+
+static int macronix_wait_ready(struct spi_flash *flash, unsigned long timeout)
+{
+ struct spi_slave *spi = flash->spi;
+ unsigned long timebase;
+ int ret;
+ u8 status;
+ u8 cmd = CMD_MX25XX_RDSR;
+
+ ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
+ if (ret) {
+ debug("SF: Failed to send command %02x: %d\n", cmd, ret);
+ return ret;
+ }
+
+ timebase = get_timer(0);
+ do {
+ ret = spi_xfer(spi, 8, NULL, &status, 0);
+ if (ret)
+ return -1;
+
+ if ((status & MACRONIX_SR_WIP) == 0)
+ break;
+
+ } while (get_timer(timebase) < timeout);
+
+ spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
+
+ if ((status & MACRONIX_SR_WIP) == 0)
+ return 0;
+
+ /* Timed out */
+ return -1;
+}
+
+static int macronix_read_fast(struct spi_flash *flash,
+ u32 offset, size_t len, void *buf)
+{
+ struct macronix_spi_flash *mcx = to_macronix_spi_flash(flash);
+ unsigned long page_addr;
+ unsigned long page_size;
+ u8 cmd[5];
+
+ page_size = mcx->params->page_size;
+ page_addr = offset / page_size;
+
+ cmd[0] = CMD_READ_ARRAY_FAST;
+ cmd[1] = page_addr >> 8;
+ cmd[2] = page_addr;
+ cmd[3] = offset % page_size;
+ cmd[4] = 0x00;
+
+ return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
+}
+
+static int macronix_write(struct spi_flash *flash,
+ u32 offset, size_t len, const void *buf)
+{
+ struct macronix_spi_flash *mcx = to_macronix_spi_flash(flash);
+ unsigned long page_addr;
+ unsigned long byte_addr;
+ unsigned long page_size;
+ size_t chunk_len;
+ size_t actual;
+ int ret;
+ u8 cmd[4];
+
+ page_size = mcx->params->page_size;
+ page_addr = offset / page_size;
+ byte_addr = offset % page_size;
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ ret = 0;
+ for (actual = 0; actual < len; actual += chunk_len) {
+ chunk_len = min(len - actual, page_size - byte_addr);
+
+ cmd[0] = CMD_MX25XX_PP;
+ cmd[1] = page_addr >> 8;
+ cmd[2] = page_addr;
+ cmd[3] = byte_addr;
+
+ debug
+ ("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
+ buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
+
+ ret = spi_flash_cmd(flash->spi, CMD_MX25XX_WREN, NULL, 0);
+ if (ret < 0) {
+ debug("SF: Enabling Write failed\n");
+ break;
+ }
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4,
+ buf + actual, chunk_len);
+ if (ret < 0) {
+ debug("SF: Macronix Page Program failed\n");
+ break;
+ }
+
+ ret = macronix_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ if (ret < 0) {
+ debug("SF: Macronix page programming timed out\n");
+ break;
+ }
+
+ page_addr++;
+ byte_addr = 0;
+ }
+
+ debug("SF: Macronix: Successfully programmed %u bytes @ 0x%x\n",
+ len, offset);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
+{
+ struct macronix_spi_flash *mcx = to_macronix_spi_flash(flash);
+ unsigned long sector_size;
+ size_t actual;
+ int ret;
+ u8 cmd[4];
+
+ /*
+ * This function currently uses sector erase only.
+ * probably speed things up by using bulk erase
+ * when possible.
+ */
+
+ sector_size = mcx->params->page_size * mcx->params->pages_per_sector
+ * mcx->params->sectors_per_block;
+
+ if (offset % sector_size || len % sector_size) {
+ debug("SF: Erase offset/length not multiple of sector size\n");
+ return -1;
+ }
+
+ len /= sector_size;
+ cmd[0] = CMD_MX25XX_BE;
+ cmd[2] = 0x00;
+ cmd[3] = 0x00;
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ ret = 0;
+ for (actual = 0; actual < len; actual++) {
+ cmd[1] = (offset / sector_size) + actual;
+
+ ret = spi_flash_cmd(flash->spi, CMD_MX25XX_WREN, NULL, 0);
+ if (ret < 0) {
+ debug("SF: Enabling Write failed\n");
+ break;
+ }
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
+ if (ret < 0) {
+ debug("SF: Macronix page erase failed\n");
+ break;
+ }
+
+ ret = macronix_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
+ if (ret < 0) {
+ debug("SF: Macronix page erase timed out\n");
+ break;
+ }
+ }
+
+ debug("SF: Macronix: Successfully erased %u bytes @ 0x%x\n",
+ len * sector_size, offset);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
+{
+ const struct macronix_spi_flash_params *params;
+ struct macronix_spi_flash *mcx;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(macronix_spi_flash_table); i++) {
+ params = &macronix_spi_flash_table[i];
+ if (params->idcode1 == idcode[2])
+ break;
+ }
+
+ if (i == ARRAY_SIZE(macronix_spi_flash_table)) {
+ debug("SF: Unsupported Macronix ID %02x\n", idcode[1]);
+ return NULL;
+ }
+
+ mcx = malloc(sizeof(*mcx));
+ if (!mcx) {
+ debug("SF: Failed to allocate memory\n");
+ return NULL;
+ }
+
+ mcx->params = params;
+ mcx->flash.spi = spi;
+ mcx->flash.name = params->name;
+
+ mcx->flash.write = macronix_write;
+ mcx->flash.erase = macronix_erase;
+ mcx->flash.read = macronix_read_fast;
+ mcx->flash.size = params->page_size * params->pages_per_sector
+ * params->sectors_per_block * params->nr_blocks;
+
+ printf("SF: Detected %s with page size %u, total %u bytes\n",
+ params->name, params->page_size, mcx->flash.size);
+
+ return &mcx->flash;
+}
generated by cgit v1.1 at 2024-11-28 06:12:30 +0000