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path: root/drivers/net/sfc/mtd.c
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Diffstat (limited to 'drivers/net/sfc/mtd.c')
-rw-r--r--drivers/net/sfc/mtd.c269
1 files changed, 0 insertions, 269 deletions
diff --git a/drivers/net/sfc/mtd.c b/drivers/net/sfc/mtd.c
deleted file mode 100644
index 820c233c3ea..00000000000
--- a/drivers/net/sfc/mtd.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/****************************************************************************
- * Driver for Solarflare Solarstorm network controllers and boards
- * Copyright 2005-2006 Fen Systems Ltd.
- * Copyright 2006-2008 Solarflare Communications Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation, incorporated herein by reference.
- */
-
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/delay.h>
-
-#define EFX_DRIVER_NAME "sfc_mtd"
-#include "net_driver.h"
-#include "spi.h"
-#include "efx.h"
-
-#define EFX_SPI_VERIFY_BUF_LEN 16
-
-struct efx_mtd {
- const struct efx_spi_device *spi;
- struct mtd_info mtd;
- char name[IFNAMSIZ + 20];
-};
-
-/* SPI utilities */
-
-static int efx_spi_slow_wait(struct efx_mtd *efx_mtd, bool uninterruptible)
-{
- const struct efx_spi_device *spi = efx_mtd->spi;
- struct efx_nic *efx = spi->efx;
- u8 status;
- int rc, i;
-
- /* Wait up to 4s for flash/EEPROM to finish a slow operation. */
- for (i = 0; i < 40; i++) {
- __set_current_state(uninterruptible ?
- TASK_UNINTERRUPTIBLE : TASK_INTERRUPTIBLE);
- schedule_timeout(HZ / 10);
- rc = falcon_spi_cmd(spi, SPI_RDSR, -1, NULL,
- &status, sizeof(status));
- if (rc)
- return rc;
- if (!(status & SPI_STATUS_NRDY))
- return 0;
- if (signal_pending(current))
- return -EINTR;
- }
- EFX_ERR(efx, "timed out waiting for %s\n", efx_mtd->name);
- return -ETIMEDOUT;
-}
-
-static int efx_spi_unlock(const struct efx_spi_device *spi)
-{
- const u8 unlock_mask = (SPI_STATUS_BP2 | SPI_STATUS_BP1 |
- SPI_STATUS_BP0);
- u8 status;
- int rc;
-
- rc = falcon_spi_cmd(spi, SPI_RDSR, -1, NULL, &status, sizeof(status));
- if (rc)
- return rc;
-
- if (!(status & unlock_mask))
- return 0; /* already unlocked */
-
- rc = falcon_spi_cmd(spi, SPI_WREN, -1, NULL, NULL, 0);
- if (rc)
- return rc;
- rc = falcon_spi_cmd(spi, SPI_SST_EWSR, -1, NULL, NULL, 0);
- if (rc)
- return rc;
-
- status &= ~unlock_mask;
- rc = falcon_spi_cmd(spi, SPI_WRSR, -1, &status, NULL, sizeof(status));
- if (rc)
- return rc;
- rc = falcon_spi_wait_write(spi);
- if (rc)
- return rc;
-
- return 0;
-}
-
-static int efx_spi_erase(struct efx_mtd *efx_mtd, loff_t start, size_t len)
-{
- const struct efx_spi_device *spi = efx_mtd->spi;
- unsigned pos, block_len;
- u8 empty[EFX_SPI_VERIFY_BUF_LEN];
- u8 buffer[EFX_SPI_VERIFY_BUF_LEN];
- int rc;
-
- if (len != spi->erase_size)
- return -EINVAL;
-
- if (spi->erase_command == 0)
- return -EOPNOTSUPP;
-
- rc = efx_spi_unlock(spi);
- if (rc)
- return rc;
- rc = falcon_spi_cmd(spi, SPI_WREN, -1, NULL, NULL, 0);
- if (rc)
- return rc;
- rc = falcon_spi_cmd(spi, spi->erase_command, start, NULL, NULL, 0);
- if (rc)
- return rc;
- rc = efx_spi_slow_wait(efx_mtd, false);
-
- /* Verify the entire region has been wiped */
- memset(empty, 0xff, sizeof(empty));
- for (pos = 0; pos < len; pos += block_len) {
- block_len = min(len - pos, sizeof(buffer));
- rc = falcon_spi_read(spi, start + pos, block_len, NULL, buffer);
- if (rc)
- return rc;
- if (memcmp(empty, buffer, block_len))
- return -EIO;
-
- /* Avoid locking up the system */
- cond_resched();
- if (signal_pending(current))
- return -EINTR;
- }
-
- return rc;
-}
-
-/* MTD interface */
-
-static int efx_mtd_read(struct mtd_info *mtd, loff_t start, size_t len,
- size_t *retlen, u8 *buffer)
-{
- struct efx_mtd *efx_mtd = mtd->priv;
- const struct efx_spi_device *spi = efx_mtd->spi;
- struct efx_nic *efx = spi->efx;
- int rc;
-
- rc = mutex_lock_interruptible(&efx->spi_lock);
- if (rc)
- return rc;
- rc = falcon_spi_read(spi, FALCON_FLASH_BOOTCODE_START + start,
- len, retlen, buffer);
- mutex_unlock(&efx->spi_lock);
- return rc;
-}
-
-static int efx_mtd_erase(struct mtd_info *mtd, struct erase_info *erase)
-{
- struct efx_mtd *efx_mtd = mtd->priv;
- struct efx_nic *efx = efx_mtd->spi->efx;
- int rc;
-
- rc = mutex_lock_interruptible(&efx->spi_lock);
- if (rc)
- return rc;
- rc = efx_spi_erase(efx_mtd, FALCON_FLASH_BOOTCODE_START + erase->addr,
- erase->len);
- mutex_unlock(&efx->spi_lock);
-
- if (rc == 0) {
- erase->state = MTD_ERASE_DONE;
- } else {
- erase->state = MTD_ERASE_FAILED;
- erase->fail_addr = 0xffffffff;
- }
- mtd_erase_callback(erase);
- return rc;
-}
-
-static int efx_mtd_write(struct mtd_info *mtd, loff_t start,
- size_t len, size_t *retlen, const u8 *buffer)
-{
- struct efx_mtd *efx_mtd = mtd->priv;
- const struct efx_spi_device *spi = efx_mtd->spi;
- struct efx_nic *efx = spi->efx;
- int rc;
-
- rc = mutex_lock_interruptible(&efx->spi_lock);
- if (rc)
- return rc;
- rc = falcon_spi_write(spi, FALCON_FLASH_BOOTCODE_START + start,
- len, retlen, buffer);
- mutex_unlock(&efx->spi_lock);
- return rc;
-}
-
-static void efx_mtd_sync(struct mtd_info *mtd)
-{
- struct efx_mtd *efx_mtd = mtd->priv;
- struct efx_nic *efx = efx_mtd->spi->efx;
- int rc;
-
- mutex_lock(&efx->spi_lock);
- rc = efx_spi_slow_wait(efx_mtd, true);
- mutex_unlock(&efx->spi_lock);
-
- if (rc)
- EFX_ERR(efx, "%s sync failed (%d)\n", efx_mtd->name, rc);
- return;
-}
-
-void efx_mtd_remove(struct efx_nic *efx)
-{
- if (efx->spi_flash && efx->spi_flash->mtd) {
- struct efx_mtd *efx_mtd = efx->spi_flash->mtd;
- int rc;
-
- for (;;) {
- rc = del_mtd_device(&efx_mtd->mtd);
- if (rc != -EBUSY)
- break;
- ssleep(1);
- }
- WARN_ON(rc);
- kfree(efx_mtd);
- }
-}
-
-void efx_mtd_rename(struct efx_nic *efx)
-{
- if (efx->spi_flash && efx->spi_flash->mtd) {
- struct efx_mtd *efx_mtd = efx->spi_flash->mtd;
- snprintf(efx_mtd->name, sizeof(efx_mtd->name),
- "%s sfc_flash_bootrom", efx->name);
- }
-}
-
-int efx_mtd_probe(struct efx_nic *efx)
-{
- struct efx_spi_device *spi = efx->spi_flash;
- struct efx_mtd *efx_mtd;
-
- if (!spi || spi->size <= FALCON_FLASH_BOOTCODE_START)
- return -ENODEV;
-
- efx_mtd = kzalloc(sizeof(*efx_mtd), GFP_KERNEL);
- if (!efx_mtd)
- return -ENOMEM;
-
- efx_mtd->spi = spi;
- spi->mtd = efx_mtd;
-
- efx_mtd->mtd.type = MTD_NORFLASH;
- efx_mtd->mtd.flags = MTD_CAP_NORFLASH;
- efx_mtd->mtd.size = spi->size - FALCON_FLASH_BOOTCODE_START;
- efx_mtd->mtd.erasesize = spi->erase_size;
- efx_mtd->mtd.writesize = 1;
- efx_mtd_rename(efx);
-
- efx_mtd->mtd.owner = THIS_MODULE;
- efx_mtd->mtd.priv = efx_mtd;
- efx_mtd->mtd.name = efx_mtd->name;
- efx_mtd->mtd.erase = efx_mtd_erase;
- efx_mtd->mtd.read = efx_mtd_read;
- efx_mtd->mtd.write = efx_mtd_write;
- efx_mtd->mtd.sync = efx_mtd_sync;
-
- if (add_mtd_device(&efx_mtd->mtd)) {
- kfree(efx_mtd);
- spi->mtd = NULL;
- /* add_mtd_device() returns 1 if the MTD table is full */
- return -ENOMEM;
- }
-
- return 0;
-}
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