summaryrefslogtreecommitdiff
path: root/src/drivers/spi/macronix.c
diff options
context:
space:
mode:
authorStefan Reinauer <reinauer@chromium.org>2012-05-10 11:27:32 -0700
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-05-10 23:52:44 +0200
commit1c56d9b1029b344b92bc1cd1acb2fe52ce0c0e2d (patch)
tree81db0d753447c2e0f8fd196ef9ba74b142baeb64 /src/drivers/spi/macronix.c
parent43105d6a5a4898386e35c4fdccdf643b95faef98 (diff)
downloadcoreboot-1c56d9b1029b344b92bc1cd1acb2fe52ce0c0e2d.tar.xz
Add SPI flash driver
This driver is taken from u-boot and adapted to match coreboot. It still contains some hacks and is ICH specific at places. Change-Id: I97dd8096f7db3b62f8f4f4e4d08bdee10d88f689 Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/997 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/drivers/spi/macronix.c')
-rw-r--r--src/drivers/spi/macronix.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/src/drivers/spi/macronix.c b/src/drivers/spi/macronix.c
new file mode 100644
index 0000000000..130e746827
--- /dev/null
+++ b/src/drivers/spi/macronix.c
@@ -0,0 +1,220 @@
+/*
+ * 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 <stdlib.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 MACRONIX_SR_WIP (1 << 0) /* Write-in-Progress */
+
+struct macronix_spi_flash_params {
+ u16 idcode;
+ 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[] = {
+ {
+ .idcode = 0x2015,
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .sectors_per_block = 16,
+ .nr_blocks = 32,
+ .name = "MX25L1605D",
+ },
+ {
+ .idcode = 0x2016,
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .sectors_per_block = 16,
+ .nr_blocks = 64,
+ .name = "MX25L3205D",
+ },
+ {
+ .idcode = 0x2017,
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .sectors_per_block = 16,
+ .nr_blocks = 128,
+ .name = "MX25L6405D",
+ },
+ {
+ .idcode = 0x2018,
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .sectors_per_block = 16,
+ .nr_blocks = 256,
+ .name = "MX25L12805D",
+ },
+ {
+ .idcode = 0x2618,
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .sectors_per_block = 16,
+ .nr_blocks = 256,
+ .name = "MX25L12855E",
+ },
+};
+
+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 byte_addr;
+ unsigned long page_size;
+ size_t chunk_len;
+ size_t actual;
+ int ret;
+ u8 cmd[4];
+
+ page_size = min(mcx->params->page_size, CONTROLLER_PAGE_LIMIT);
+ byte_addr = offset % page_size;
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ printk(BIOS_WARNING, "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] = (offset >> 16) & 0xff;
+ cmd[2] = (offset >> 8) & 0xff;
+ cmd[3] = offset & 0xff;
+
+ printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zd\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) {
+ printk(BIOS_WARNING, "SF: Enabling Write failed\n");
+ break;
+ }
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4,
+ buf + actual, chunk_len);
+ if (ret < 0) {
+ printk(BIOS_WARNING, "SF: Macronix Page Program failed\n");
+ break;
+ }
+
+ ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ if (ret)
+ break;
+
+ offset += chunk_len;
+ byte_addr = 0;
+ }
+
+ printk(BIOS_INFO, "SF: Macronix: Successfully programmed %zu bytes @ 0x%lx\n",
+ len, offset - len);
+
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+static int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
+{
+ return spi_flash_cmd_erase(flash, CMD_MX25XX_SE, offset, len);
+}
+
+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;
+ u16 id = idcode[2] | idcode[1] << 8;
+
+ for (i = 0; i < ARRAY_SIZE(macronix_spi_flash_table); i++) {
+ params = &macronix_spi_flash_table[i];
+ if (params->idcode == id)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(macronix_spi_flash_table)) {
+ printk(BIOS_WARNING, "SF: Unsupported Macronix ID %04x\n", id);
+ return NULL;
+ }
+
+ mcx = malloc(sizeof(*mcx));
+ if (!mcx) {
+ printk(BIOS_WARNING, "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;
+#ifdef CONFIG_SPI_FLASH_NO_FAST_READ
+ mcx->flash.read = spi_flash_cmd_read_slow;
+#else
+ mcx->flash.read = spi_flash_cmd_read_fast;
+#endif
+ mcx->flash.sector_size = params->page_size * params->pages_per_sector;
+ mcx->flash.size = mcx->flash.sector_size * params->sectors_per_block *
+ params->nr_blocks;
+
+ return &mcx->flash;
+}