[PATCH] staging: Remove the mt29f_spinand driver
Boris Brezillon
boris.brezillon at bootlin.com
Mon Oct 22 20:10:59 UTC 2018
A new SPI NAND subsystem has been added in drivers/mtd/nand/spi/ and
Micron's MT29F devices are now supported in
drivers/mtd/nand/spi/micron.c.
Remove the old driver.
Signed-off-by: Boris Brezillon <boris.brezillon at bootlin.com>
---
Hello,
If anything is missing in drivers/mtd/nand/spi/micron.c to properly
support the devices supported by the mt29f_spinand driver, please let
me know.
I might accept to delay removal of this driver if I have some guarantees
that existing users will actually switch to the new driver at some
point.
Regards,
Boris
---
drivers/staging/Kconfig | 2 -
drivers/staging/Makefile | 1 -
drivers/staging/mt29f_spinand/Kconfig | 16 -
drivers/staging/mt29f_spinand/Makefile | 1 -
drivers/staging/mt29f_spinand/TODO | 13 -
drivers/staging/mt29f_spinand/mt29f_spinand.c | 980 ------------------
drivers/staging/mt29f_spinand/mt29f_spinand.h | 106 --
7 files changed, 1119 deletions(-)
delete mode 100644 drivers/staging/mt29f_spinand/Kconfig
delete mode 100644 drivers/staging/mt29f_spinand/Makefile
delete mode 100644 drivers/staging/mt29f_spinand/TODO
delete mode 100644 drivers/staging/mt29f_spinand/mt29f_spinand.c
delete mode 100644 drivers/staging/mt29f_spinand/mt29f_spinand.h
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 1abf76be2aa8..92e3cb82c5da 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -78,8 +78,6 @@ source "drivers/staging/goldfish/Kconfig"
source "drivers/staging/netlogic/Kconfig"
-source "drivers/staging/mt29f_spinand/Kconfig"
-
source "drivers/staging/dgnc/Kconfig"
source "drivers/staging/gs_fpgaboot/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index ab0cbe8815b1..ec54f8f1cb5d 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -30,7 +30,6 @@ obj-$(CONFIG_LTE_GDM724X) += gdm724x/
obj-$(CONFIG_FIREWIRE_SERIAL) += fwserial/
obj-$(CONFIG_GOLDFISH) += goldfish/
obj-$(CONFIG_DGNC) += dgnc/
-obj-$(CONFIG_MTD_SPINAND_MT29F) += mt29f_spinand/
obj-$(CONFIG_GS_FPGABOOT) += gs_fpgaboot/
obj-$(CONFIG_UNISYSSPAR) += unisys/
obj-$(CONFIG_COMMON_CLK_XLNX_CLKWZRD) += clocking-wizard/
diff --git a/drivers/staging/mt29f_spinand/Kconfig b/drivers/staging/mt29f_spinand/Kconfig
deleted file mode 100644
index f3f9cb3b5c35..000000000000
--- a/drivers/staging/mt29f_spinand/Kconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-config MTD_SPINAND_MT29F
- tristate "SPINAND Device Support for Micron"
- depends on MTD_NAND && SPI
- help
- This enables support for accessing Micron SPI NAND flash
- devices.
- If you have Micron SPI NAND chip say yes.
-
- If unsure, say no here.
-
-config MTD_SPINAND_ONDIEECC
- bool "Use SPINAND internal ECC"
- depends on MTD_SPINAND_MT29F
- help
- Internal ECC.
- Enables Hardware ECC support for Micron SPI NAND.
diff --git a/drivers/staging/mt29f_spinand/Makefile b/drivers/staging/mt29f_spinand/Makefile
deleted file mode 100644
index e47af0f7fda9..000000000000
--- a/drivers/staging/mt29f_spinand/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_MTD_SPINAND_MT29F) += mt29f_spinand.o
diff --git a/drivers/staging/mt29f_spinand/TODO b/drivers/staging/mt29f_spinand/TODO
deleted file mode 100644
index a2209b72d371..000000000000
--- a/drivers/staging/mt29f_spinand/TODO
+++ /dev/null
@@ -1,13 +0,0 @@
-TODO:
- - Tested on XLP platform, needs to be tested on other platforms.
- - Checkpatch.pl cleanups
- - Sparce fixes.
- - Clean up coding style to meet kernel standard.
-
-Please send patches
-To:
-Kamlakant Patel <kamlakant.patel at broadcom.com>
-Cc:
-Greg Kroah-Hartman <gregkh at linuxfoundation.org>
-Mona Anonuevo <manonuevo at micron.com>
-linux-mtd at lists.infradead.org
diff --git a/drivers/staging/mt29f_spinand/mt29f_spinand.c b/drivers/staging/mt29f_spinand/mt29f_spinand.c
deleted file mode 100644
index def8a1f57d1c..000000000000
--- a/drivers/staging/mt29f_spinand/mt29f_spinand.c
+++ /dev/null
@@ -1,980 +0,0 @@
-/*
- * Copyright (c) 2003-2013 Broadcom Corporation
- *
- * Copyright (c) 2009-2010 Micron Technology, Inc.
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/rawnand.h>
-#include <linux/spi/spi.h>
-
-#include "mt29f_spinand.h"
-
-#define BUFSIZE (10 * 64 * 2048)
-#define CACHE_BUF 2112
-/*
- * OOB area specification layout: Total 32 available free bytes.
- */
-
-static inline struct spinand_state *mtd_to_state(struct mtd_info *mtd)
-{
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct spinand_info *info = nand_get_controller_data(chip);
- struct spinand_state *state = info->priv;
-
- return state;
-}
-
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
-static int enable_hw_ecc;
-static int enable_read_hw_ecc;
-
-static int spinand_ooblayout_64_ecc(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- if (section > 3)
- return -ERANGE;
-
- oobregion->offset = (section * 16) + 1;
- oobregion->length = 6;
-
- return 0;
-}
-
-static int spinand_ooblayout_64_free(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- if (section > 3)
- return -ERANGE;
-
- oobregion->offset = (section * 16) + 8;
- oobregion->length = 8;
-
- return 0;
-}
-
-static const struct mtd_ooblayout_ops spinand_oob_64_ops = {
- .ecc = spinand_ooblayout_64_ecc,
- .free = spinand_ooblayout_64_free,
-};
-#endif
-
-/**
- * spinand_cmd - process a command to send to the SPI Nand
- * Description:
- * Set up the command buffer to send to the SPI controller.
- * The command buffer has to initialized to 0.
- */
-
-static int spinand_cmd(struct spi_device *spi, struct spinand_cmd *cmd)
-{
- struct spi_message message;
- struct spi_transfer x[4];
- u8 dummy = 0xff;
-
- spi_message_init(&message);
- memset(x, 0, sizeof(x));
-
- x[0].len = 1;
- x[0].tx_buf = &cmd->cmd;
- spi_message_add_tail(&x[0], &message);
-
- if (cmd->n_addr) {
- x[1].len = cmd->n_addr;
- x[1].tx_buf = cmd->addr;
- spi_message_add_tail(&x[1], &message);
- }
-
- if (cmd->n_dummy) {
- x[2].len = cmd->n_dummy;
- x[2].tx_buf = &dummy;
- spi_message_add_tail(&x[2], &message);
- }
-
- if (cmd->n_tx) {
- x[3].len = cmd->n_tx;
- x[3].tx_buf = cmd->tx_buf;
- spi_message_add_tail(&x[3], &message);
- }
-
- if (cmd->n_rx) {
- x[3].len = cmd->n_rx;
- x[3].rx_buf = cmd->rx_buf;
- spi_message_add_tail(&x[3], &message);
- }
-
- return spi_sync(spi, &message);
-}
-
-/**
- * spinand_read_id - Read SPI Nand ID
- * Description:
- * read two ID bytes from the SPI Nand device
- */
-static int spinand_read_id(struct spi_device *spi_nand, u8 *id)
-{
- int retval;
- u8 nand_id[3];
- struct spinand_cmd cmd = {0};
-
- cmd.cmd = CMD_READ_ID;
- cmd.n_rx = 3;
- cmd.rx_buf = &nand_id[0];
-
- retval = spinand_cmd(spi_nand, &cmd);
- if (retval < 0) {
- dev_err(&spi_nand->dev, "error %d reading id\n", retval);
- return retval;
- }
- id[0] = nand_id[1];
- id[1] = nand_id[2];
- return retval;
-}
-
-/**
- * spinand_read_status - send command 0xf to the SPI Nand status register
- * Description:
- * After read, write, or erase, the Nand device is expected to set the
- * busy status.
- * This function is to allow reading the status of the command: read,
- * write, and erase.
- * Once the status turns to be ready, the other status bits also are
- * valid status bits.
- */
-static int spinand_read_status(struct spi_device *spi_nand, u8 *status)
-{
- struct spinand_cmd cmd = {0};
- int ret;
-
- cmd.cmd = CMD_READ_REG;
- cmd.n_addr = 1;
- cmd.addr[0] = REG_STATUS;
- cmd.n_rx = 1;
- cmd.rx_buf = status;
-
- ret = spinand_cmd(spi_nand, &cmd);
- if (ret < 0)
- dev_err(&spi_nand->dev, "err: %d read status register\n", ret);
-
- return ret;
-}
-
-#define MAX_WAIT_JIFFIES (40 * HZ)
-static int wait_till_ready(struct spi_device *spi_nand)
-{
- unsigned long deadline;
- int retval;
- u8 stat = 0;
-
- deadline = jiffies + MAX_WAIT_JIFFIES;
- do {
- retval = spinand_read_status(spi_nand, &stat);
- if (retval < 0)
- return -1;
- if (!(stat & 0x1))
- break;
-
- cond_resched();
- } while (!time_after_eq(jiffies, deadline));
-
- if ((stat & 0x1) == 0)
- return 0;
-
- return -1;
-}
-
-/**
- * spinand_get_otp - send command 0xf to read the SPI Nand OTP register
- * Description:
- * There is one bit( bit 0x10 ) to set or to clear the internal ECC.
- * Enable chip internal ECC, set the bit to 1
- * Disable chip internal ECC, clear the bit to 0
- */
-static int spinand_get_otp(struct spi_device *spi_nand, u8 *otp)
-{
- struct spinand_cmd cmd = {0};
- int retval;
-
- cmd.cmd = CMD_READ_REG;
- cmd.n_addr = 1;
- cmd.addr[0] = REG_OTP;
- cmd.n_rx = 1;
- cmd.rx_buf = otp;
-
- retval = spinand_cmd(spi_nand, &cmd);
- if (retval < 0)
- dev_err(&spi_nand->dev, "error %d get otp\n", retval);
- return retval;
-}
-
-/**
- * spinand_set_otp - send command 0x1f to write the SPI Nand OTP register
- * Description:
- * There is one bit( bit 0x10 ) to set or to clear the internal ECC.
- * Enable chip internal ECC, set the bit to 1
- * Disable chip internal ECC, clear the bit to 0
- */
-static int spinand_set_otp(struct spi_device *spi_nand, u8 *otp)
-{
- int retval;
- struct spinand_cmd cmd = {0};
-
- cmd.cmd = CMD_WRITE_REG;
- cmd.n_addr = 1;
- cmd.addr[0] = REG_OTP;
- cmd.n_tx = 1;
- cmd.tx_buf = otp;
-
- retval = spinand_cmd(spi_nand, &cmd);
- if (retval < 0)
- dev_err(&spi_nand->dev, "error %d set otp\n", retval);
-
- return retval;
-}
-
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
-/**
- * spinand_enable_ecc - send command 0x1f to write the SPI Nand OTP register
- * Description:
- * There is one bit( bit 0x10 ) to set or to clear the internal ECC.
- * Enable chip internal ECC, set the bit to 1
- * Disable chip internal ECC, clear the bit to 0
- */
-static int spinand_enable_ecc(struct spi_device *spi_nand)
-{
- int retval;
- u8 otp = 0;
-
- retval = spinand_get_otp(spi_nand, &otp);
- if (retval < 0)
- return retval;
-
- if ((otp & OTP_ECC_MASK) == OTP_ECC_MASK)
- return 0;
- otp |= OTP_ECC_MASK;
- retval = spinand_set_otp(spi_nand, &otp);
- if (retval < 0)
- return retval;
- return spinand_get_otp(spi_nand, &otp);
-}
-#endif
-
-static int spinand_disable_ecc(struct spi_device *spi_nand)
-{
- int retval;
- u8 otp = 0;
-
- retval = spinand_get_otp(spi_nand, &otp);
- if (retval < 0)
- return retval;
-
- if ((otp & OTP_ECC_MASK) == OTP_ECC_MASK) {
- otp &= ~OTP_ECC_MASK;
- retval = spinand_set_otp(spi_nand, &otp);
- if (retval < 0)
- return retval;
- return spinand_get_otp(spi_nand, &otp);
- }
- return 0;
-}
-
-/**
- * spinand_write_enable - send command 0x06 to enable write or erase the
- * Nand cells
- * Description:
- * Before write and erase the Nand cells, the write enable has to be set.
- * After the write or erase, the write enable bit is automatically
- * cleared (status register bit 2)
- * Set the bit 2 of the status register has the same effect
- */
-static int spinand_write_enable(struct spi_device *spi_nand)
-{
- struct spinand_cmd cmd = {0};
-
- cmd.cmd = CMD_WR_ENABLE;
- return spinand_cmd(spi_nand, &cmd);
-}
-
-static int spinand_read_page_to_cache(struct spi_device *spi_nand, u16 page_id)
-{
- struct spinand_cmd cmd = {0};
- u16 row;
-
- row = page_id;
- cmd.cmd = CMD_READ;
- cmd.n_addr = 3;
- cmd.addr[0] = (u8)((row & 0xff0000) >> 16);
- cmd.addr[1] = (u8)((row & 0xff00) >> 8);
- cmd.addr[2] = (u8)(row & 0x00ff);
-
- return spinand_cmd(spi_nand, &cmd);
-}
-
-/**
- * spinand_read_from_cache - send command 0x03 to read out the data from the
- * cache register (2112 bytes max)
- * Description:
- * The read can specify 1 to 2112 bytes of data read at the corresponding
- * locations.
- * No tRd delay.
- */
-static int spinand_read_from_cache(struct spi_device *spi_nand, u16 page_id,
- u16 byte_id, u16 len, u8 *rbuf)
-{
- struct spinand_cmd cmd = {0};
- u16 column;
-
- column = byte_id;
- cmd.cmd = CMD_READ_RDM;
- cmd.n_addr = 3;
- cmd.addr[0] = (u8)((column & 0xff00) >> 8);
- cmd.addr[0] |= (u8)(((page_id >> 6) & 0x1) << 4);
- cmd.addr[1] = (u8)(column & 0x00ff);
- cmd.addr[2] = (u8)(0xff);
- cmd.n_dummy = 0;
- cmd.n_rx = len;
- cmd.rx_buf = rbuf;
-
- return spinand_cmd(spi_nand, &cmd);
-}
-
-/**
- * spinand_read_page - read a page
- * @page_id: the physical page number
- * @offset: the location from 0 to 2111
- * @len: number of bytes to read
- * @rbuf: read buffer to hold @len bytes
- *
- * Description:
- * The read includes two commands to the Nand - 0x13 and 0x03 commands
- * Poll to read status to wait for tRD time.
- */
-static int spinand_read_page(struct spi_device *spi_nand, u16 page_id,
- u16 offset, u16 len, u8 *rbuf)
-{
- int ret;
- u8 status = 0;
-
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
- if (enable_read_hw_ecc) {
- if (spinand_enable_ecc(spi_nand) < 0)
- dev_err(&spi_nand->dev, "enable HW ECC failed!");
- }
-#endif
- ret = spinand_read_page_to_cache(spi_nand, page_id);
- if (ret < 0)
- return ret;
-
- if (wait_till_ready(spi_nand))
- dev_err(&spi_nand->dev, "WAIT timedout!!!\n");
-
- while (1) {
- ret = spinand_read_status(spi_nand, &status);
- if (ret < 0) {
- dev_err(&spi_nand->dev,
- "err %d read status register\n", ret);
- return ret;
- }
-
- if ((status & STATUS_OIP_MASK) == STATUS_READY) {
- if ((status & STATUS_ECC_MASK) == STATUS_ECC_ERROR) {
- dev_err(&spi_nand->dev, "ecc error, page=%d\n",
- page_id);
- return 0;
- }
- break;
- }
- }
-
- ret = spinand_read_from_cache(spi_nand, page_id, offset, len, rbuf);
- if (ret < 0) {
- dev_err(&spi_nand->dev, "read from cache failed!!\n");
- return ret;
- }
-
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
- if (enable_read_hw_ecc) {
- ret = spinand_disable_ecc(spi_nand);
- if (ret < 0) {
- dev_err(&spi_nand->dev, "disable ecc failed!!\n");
- return ret;
- }
- enable_read_hw_ecc = 0;
- }
-#endif
- return ret;
-}
-
-/**
- * spinand_program_data_to_cache - write a page to cache
- * @byte_id: the location to write to the cache
- * @len: number of bytes to write
- * @wbuf: write buffer holding @len bytes
- *
- * Description:
- * The write command used here is 0x84--indicating that the cache is
- * not cleared first.
- * Since it is writing the data to cache, there is no tPROG time.
- */
-static int spinand_program_data_to_cache(struct spi_device *spi_nand,
- u16 page_id, u16 byte_id,
- u16 len, u8 *wbuf)
-{
- struct spinand_cmd cmd = {0};
- u16 column;
-
- column = byte_id;
- cmd.cmd = CMD_PROG_PAGE_CLRCACHE;
- cmd.n_addr = 2;
- cmd.addr[0] = (u8)((column & 0xff00) >> 8);
- cmd.addr[0] |= (u8)(((page_id >> 6) & 0x1) << 4);
- cmd.addr[1] = (u8)(column & 0x00ff);
- cmd.n_tx = len;
- cmd.tx_buf = wbuf;
-
- return spinand_cmd(spi_nand, &cmd);
-}
-
-/**
- * spinand_program_execute - write a page from cache to the Nand array
- * @page_id: the physical page location to write the page.
- *
- * Description:
- * The write command used here is 0x10--indicating the cache is writing to
- * the Nand array.
- * Need to wait for tPROG time to finish the transaction.
- */
-static int spinand_program_execute(struct spi_device *spi_nand, u16 page_id)
-{
- struct spinand_cmd cmd = {0};
- u16 row;
-
- row = page_id;
- cmd.cmd = CMD_PROG_PAGE_EXC;
- cmd.n_addr = 3;
- cmd.addr[0] = (u8)((row & 0xff0000) >> 16);
- cmd.addr[1] = (u8)((row & 0xff00) >> 8);
- cmd.addr[2] = (u8)(row & 0x00ff);
-
- return spinand_cmd(spi_nand, &cmd);
-}
-
-/**
- * spinand_program_page - write a page
- * @page_id: the physical page location to write the page.
- * @offset: the location from the cache starting from 0 to 2111
- * @len: the number of bytes to write
- * @buf: the buffer holding @len bytes
- *
- * Description:
- * The commands used here are 0x06, 0x84, and 0x10--indicating that
- * the write enable is first sent, the write cache command, and the
- * write execute command.
- * Poll to wait for the tPROG time to finish the transaction.
- */
-static int spinand_program_page(struct spi_device *spi_nand,
- u16 page_id, u16 offset, u16 len, u8 *buf)
-{
- int retval;
- u8 status = 0;
- u8 *wbuf;
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
- unsigned int i, j;
-
- wbuf = devm_kzalloc(&spi_nand->dev, CACHE_BUF, GFP_KERNEL);
- if (!wbuf)
- return -ENOMEM;
-
- enable_read_hw_ecc = 1;
- retval = spinand_read_page(spi_nand, page_id, 0, CACHE_BUF, wbuf);
- if (retval < 0) {
- dev_err(&spi_nand->dev, "ecc error on read page!!!\n");
- return retval;
- }
-
- for (i = offset, j = 0; i < len; i++, j++)
- wbuf[i] &= buf[j];
-
- if (enable_hw_ecc) {
- retval = spinand_enable_ecc(spi_nand);
- if (retval < 0) {
- dev_err(&spi_nand->dev, "enable ecc failed!!\n");
- return retval;
- }
- }
-#else
- wbuf = buf;
-#endif
- retval = spinand_write_enable(spi_nand);
- if (retval < 0) {
- dev_err(&spi_nand->dev, "write enable failed!!\n");
- return retval;
- }
- if (wait_till_ready(spi_nand))
- dev_err(&spi_nand->dev, "wait timedout!!!\n");
-
- retval = spinand_program_data_to_cache(spi_nand, page_id,
- offset, len, wbuf);
- if (retval < 0)
- return retval;
- retval = spinand_program_execute(spi_nand, page_id);
- if (retval < 0)
- return retval;
- while (1) {
- retval = spinand_read_status(spi_nand, &status);
- if (retval < 0) {
- dev_err(&spi_nand->dev,
- "error %d reading status register\n", retval);
- return retval;
- }
-
- if ((status & STATUS_OIP_MASK) == STATUS_READY) {
- if ((status & STATUS_P_FAIL_MASK) == STATUS_P_FAIL) {
- dev_err(&spi_nand->dev,
- "program error, page %d\n", page_id);
- return -1;
- }
- break;
- }
- }
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
- if (enable_hw_ecc) {
- retval = spinand_disable_ecc(spi_nand);
- if (retval < 0) {
- dev_err(&spi_nand->dev, "disable ecc failed!!\n");
- return retval;
- }
- enable_hw_ecc = 0;
- }
-#endif
-
- return 0;
-}
-
-/**
- * spinand_erase_block_erase - erase a page
- * @block_id: the physical block location to erase.
- *
- * Description:
- * The command used here is 0xd8--indicating an erase command to erase
- * one block--64 pages
- * Need to wait for tERS.
- */
-static int spinand_erase_block_erase(struct spi_device *spi_nand, u16 block_id)
-{
- struct spinand_cmd cmd = {0};
- u16 row;
-
- row = block_id;
- cmd.cmd = CMD_ERASE_BLK;
- cmd.n_addr = 3;
- cmd.addr[0] = (u8)((row & 0xff0000) >> 16);
- cmd.addr[1] = (u8)((row & 0xff00) >> 8);
- cmd.addr[2] = (u8)(row & 0x00ff);
-
- return spinand_cmd(spi_nand, &cmd);
-}
-
-/**
- * spinand_erase_block - erase a page
- * @block_id: the physical block location to erase.
- *
- * Description:
- * The commands used here are 0x06 and 0xd8--indicating an erase
- * command to erase one block--64 pages
- * It will first to enable the write enable bit (0x06 command),
- * and then send the 0xd8 erase command
- * Poll to wait for the tERS time to complete the tranaction.
- */
-static int spinand_erase_block(struct spi_device *spi_nand, u16 block_id)
-{
- int retval;
- u8 status = 0;
-
- retval = spinand_write_enable(spi_nand);
- if (wait_till_ready(spi_nand))
- dev_err(&spi_nand->dev, "wait timedout!!!\n");
-
- retval = spinand_erase_block_erase(spi_nand, block_id);
- while (1) {
- retval = spinand_read_status(spi_nand, &status);
- if (retval < 0) {
- dev_err(&spi_nand->dev,
- "error %d reading status register\n", retval);
- return retval;
- }
-
- if ((status & STATUS_OIP_MASK) == STATUS_READY) {
- if ((status & STATUS_E_FAIL_MASK) == STATUS_E_FAIL) {
- dev_err(&spi_nand->dev,
- "erase error, block %d\n", block_id);
- return -1;
- }
- break;
- }
- }
- return 0;
-}
-
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
-static int spinand_write_page_hwecc(struct nand_chip *chip,
- const u8 *buf, int oob_required,
- int page)
-{
- const u8 *p = buf;
- int eccsize = chip->ecc.size;
- int eccsteps = chip->ecc.steps;
-
- enable_hw_ecc = 1;
- return nand_prog_page_op(chip, page, 0, p, eccsize * eccsteps);
-}
-
-static int spinand_read_page_hwecc(struct nand_chip *chip, u8 *buf,
- int oob_required, int page)
-{
- int retval;
- u8 status;
- u8 *p = buf;
- int eccsize = chip->ecc.size;
- int eccsteps = chip->ecc.steps;
- struct mtd_info *mtd = nand_to_mtd(chip);
- struct spinand_info *info = nand_get_controller_data(chip);
-
- enable_read_hw_ecc = 1;
-
- nand_read_page_op(chip, page, 0, p, eccsize * eccsteps);
- if (oob_required)
- chip->legacy.read_buf(chip, chip->oob_poi, mtd->oobsize);
-
- while (1) {
- retval = spinand_read_status(info->spi, &status);
- if (retval < 0) {
- dev_err(&mtd->dev,
- "error %d reading status register\n", retval);
- return retval;
- }
-
- if ((status & STATUS_OIP_MASK) == STATUS_READY) {
- if ((status & STATUS_ECC_MASK) == STATUS_ECC_ERROR) {
- pr_info("spinand: ECC error\n");
- mtd->ecc_stats.failed++;
- } else if ((status & STATUS_ECC_MASK) ==
- STATUS_ECC_1BIT_CORRECTED)
- mtd->ecc_stats.corrected++;
- break;
- }
- }
- return 0;
-}
-#endif
-
-static void spinand_select_chip(struct nand_chip *chip, int dev)
-{
-}
-
-static u8 spinand_read_byte(struct nand_chip *chip)
-{
- struct spinand_state *state = mtd_to_state(nand_to_mtd(chip));
- u8 data;
-
- data = state->buf[state->buf_ptr];
- state->buf_ptr++;
- return data;
-}
-
-static int spinand_wait(struct nand_chip *chip)
-{
- struct mtd_info *mtd = nand_to_mtd(chip);
- struct spinand_info *info = nand_get_controller_data(chip);
-
- unsigned long timeo = jiffies;
- int retval, state = chip->state;
- u8 status;
-
- if (state == FL_ERASING)
- timeo += (HZ * 400) / 1000;
- else
- timeo += (HZ * 20) / 1000;
-
- while (time_before(jiffies, timeo)) {
- retval = spinand_read_status(info->spi, &status);
- if (retval < 0) {
- dev_err(&mtd->dev,
- "error %d reading status register\n", retval);
- return retval;
- }
-
- if ((status & STATUS_OIP_MASK) == STATUS_READY)
- return 0;
-
- cond_resched();
- }
- return 0;
-}
-
-static void spinand_write_buf(struct nand_chip *chip, const u8 *buf, int len)
-{
- struct spinand_state *state = mtd_to_state(nand_to_mtd(chip));
-
- memcpy(state->buf + state->buf_ptr, buf, len);
- state->buf_ptr += len;
-}
-
-static void spinand_read_buf(struct nand_chip *chip, u8 *buf, int len)
-{
- struct spinand_state *state = mtd_to_state(nand_to_mtd(chip));
-
- memcpy(buf, state->buf + state->buf_ptr, len);
- state->buf_ptr += len;
-}
-
-/*
- * spinand_reset- send RESET command "0xff" to the Nand device.
- */
-static void spinand_reset(struct spi_device *spi_nand)
-{
- struct spinand_cmd cmd = {0};
-
- cmd.cmd = CMD_RESET;
-
- if (spinand_cmd(spi_nand, &cmd) < 0)
- pr_info("spinand reset failed!\n");
-
- /* elapse 1ms before issuing any other command */
- usleep_range(1000, 2000);
-
- if (wait_till_ready(spi_nand))
- dev_err(&spi_nand->dev, "wait timedout!\n");
-}
-
-static void spinand_cmdfunc(struct nand_chip *chip, unsigned int command,
- int column, int page)
-{
- struct mtd_info *mtd = nand_to_mtd(chip);
- struct spinand_info *info = nand_get_controller_data(chip);
- struct spinand_state *state = info->priv;
-
- switch (command) {
- /*
- * READ0 - read in first 0x800 bytes
- */
- case NAND_CMD_READ1:
- case NAND_CMD_READ0:
- state->buf_ptr = 0;
- spinand_read_page(info->spi, page, 0x0, 0x840, state->buf);
- break;
- /* READOOB reads only the OOB because no ECC is performed. */
- case NAND_CMD_READOOB:
- state->buf_ptr = 0;
- spinand_read_page(info->spi, page, 0x800, 0x40, state->buf);
- break;
- case NAND_CMD_RNDOUT:
- state->buf_ptr = column;
- break;
- case NAND_CMD_READID:
- state->buf_ptr = 0;
- spinand_read_id(info->spi, state->buf);
- break;
- case NAND_CMD_PARAM:
- state->buf_ptr = 0;
- break;
- /* ERASE1 stores the block and page address */
- case NAND_CMD_ERASE1:
- spinand_erase_block(info->spi, page);
- break;
- /* ERASE2 uses the block and page address from ERASE1 */
- case NAND_CMD_ERASE2:
- break;
- /* SEQIN sets up the addr buffer and all registers except the length */
- case NAND_CMD_SEQIN:
- state->col = column;
- state->row = page;
- state->buf_ptr = 0;
- break;
- /* PAGEPROG reuses all of the setup from SEQIN and adds the length */
- case NAND_CMD_PAGEPROG:
- spinand_program_page(info->spi, state->row, state->col,
- state->buf_ptr, state->buf);
- break;
- case NAND_CMD_STATUS:
- spinand_get_otp(info->spi, state->buf);
- if (!(state->buf[0] & 0x80))
- state->buf[0] = 0x80;
- state->buf_ptr = 0;
- break;
- /* RESET command */
- case NAND_CMD_RESET:
- if (wait_till_ready(info->spi))
- dev_err(&info->spi->dev, "WAIT timedout!!!\n");
- /* a minimum of 250us must elapse before issuing RESET cmd*/
- usleep_range(250, 1000);
- spinand_reset(info->spi);
- break;
- default:
- dev_err(&mtd->dev, "Unknown CMD: 0x%x\n", command);
- }
-}
-
-/**
- * spinand_lock_block - send write register 0x1f command to the Nand device
- *
- * Description:
- * After power up, all the Nand blocks are locked. This function allows
- * one to unlock the blocks, and so it can be written or erased.
- */
-static int spinand_lock_block(struct spi_device *spi_nand, u8 lock)
-{
- struct spinand_cmd cmd = {0};
- int ret;
- u8 otp = 0;
-
- ret = spinand_get_otp(spi_nand, &otp);
-
- cmd.cmd = CMD_WRITE_REG;
- cmd.n_addr = 1;
- cmd.addr[0] = REG_BLOCK_LOCK;
- cmd.n_tx = 1;
- cmd.tx_buf = &lock;
-
- ret = spinand_cmd(spi_nand, &cmd);
- if (ret < 0)
- dev_err(&spi_nand->dev, "error %d lock block\n", ret);
-
- return ret;
-}
-
-/**
- * spinand_probe - [spinand Interface]
- * @spi_nand: registered device driver.
- *
- * Description:
- * Set up the device driver parameters to make the device available.
- */
-static int spinand_probe(struct spi_device *spi_nand)
-{
- struct mtd_info *mtd;
- struct nand_chip *chip;
- struct spinand_info *info;
- struct spinand_state *state;
-
- info = devm_kzalloc(&spi_nand->dev, sizeof(struct spinand_info),
- GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- info->spi = spi_nand;
-
- spinand_lock_block(spi_nand, BL_ALL_UNLOCKED);
-
- state = devm_kzalloc(&spi_nand->dev, sizeof(struct spinand_state),
- GFP_KERNEL);
- if (!state)
- return -ENOMEM;
-
- info->priv = state;
- state->buf_ptr = 0;
- state->buf = devm_kzalloc(&spi_nand->dev, BUFSIZE, GFP_KERNEL);
- if (!state->buf)
- return -ENOMEM;
-
- chip = devm_kzalloc(&spi_nand->dev, sizeof(struct nand_chip),
- GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
- chip->ecc.mode = NAND_ECC_HW;
- chip->ecc.size = 0x200;
- chip->ecc.bytes = 0x6;
- chip->ecc.steps = 0x4;
-
- chip->ecc.strength = 1;
- chip->ecc.total = chip->ecc.steps * chip->ecc.bytes;
- chip->ecc.read_page = spinand_read_page_hwecc;
- chip->ecc.write_page = spinand_write_page_hwecc;
-#else
- chip->ecc.mode = NAND_ECC_SOFT;
- chip->ecc.algo = NAND_ECC_HAMMING;
- if (spinand_disable_ecc(spi_nand) < 0)
- dev_info(&spi_nand->dev, "%s: disable ecc failed!\n",
- __func__);
-#endif
-
- nand_set_flash_node(chip, spi_nand->dev.of_node);
- nand_set_controller_data(chip, info);
- chip->legacy.read_buf = spinand_read_buf;
- chip->legacy.write_buf = spinand_write_buf;
- chip->legacy.read_byte = spinand_read_byte;
- chip->legacy.cmdfunc = spinand_cmdfunc;
- chip->legacy.waitfunc = spinand_wait;
- chip->options |= NAND_CACHEPRG;
- chip->select_chip = spinand_select_chip;
- chip->legacy.set_features = nand_get_set_features_notsupp;
- chip->legacy.get_features = nand_get_set_features_notsupp;
-
- mtd = nand_to_mtd(chip);
-
- dev_set_drvdata(&spi_nand->dev, mtd);
-
- mtd->dev.parent = &spi_nand->dev;
- mtd->oobsize = 64;
-#ifdef CONFIG_MTD_SPINAND_ONDIEECC
- mtd_set_ooblayout(mtd, &spinand_oob_64_ops);
-#endif
-
- if (nand_scan(chip, 1))
- return -ENXIO;
-
- return mtd_device_register(mtd, NULL, 0);
-}
-
-/**
- * spinand_remove - remove the device driver
- * @spi: the spi device.
- *
- * Description:
- * Remove the device driver parameters and free up allocated memories.
- */
-static int spinand_remove(struct spi_device *spi)
-{
- mtd_device_unregister(dev_get_drvdata(&spi->dev));
-
- return 0;
-}
-
-static const struct of_device_id spinand_dt[] = {
- { .compatible = "spinand,mt29f", },
- {}
-};
-MODULE_DEVICE_TABLE(of, spinand_dt);
-
-/*
- * Device name structure description
- */
-static struct spi_driver spinand_driver = {
- .driver = {
- .name = "mt29f",
- .of_match_table = spinand_dt,
- },
- .probe = spinand_probe,
- .remove = spinand_remove,
-};
-
-module_spi_driver(spinand_driver);
-
-MODULE_DESCRIPTION("SPI NAND driver for Micron");
-MODULE_AUTHOR("Henry Pan <hspan at micron.com>, Kamlakant Patel <kamlakant.patel at broadcom.com>");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/mt29f_spinand/mt29f_spinand.h b/drivers/staging/mt29f_spinand/mt29f_spinand.h
deleted file mode 100644
index 457dc7ffdaf1..000000000000
--- a/drivers/staging/mt29f_spinand/mt29f_spinand.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*-
- * Copyright 2013 Broadcom Corporation
- *
- * Copyright (c) 2009-2010 Micron Technology, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- * Henry Pan <hspan at micron.com>
- *
- * based on nand.h
- */
-#ifndef __LINUX_MTD_SPI_NAND_H
-#define __LINUX_MTD_SPI_NAND_H
-
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/mtd/mtd.h>
-
-/* cmd */
-#define CMD_READ 0x13
-#define CMD_READ_RDM 0x03
-#define CMD_PROG_PAGE_CLRCACHE 0x02
-#define CMD_PROG_PAGE 0x84
-#define CMD_PROG_PAGE_EXC 0x10
-#define CMD_ERASE_BLK 0xd8
-#define CMD_WR_ENABLE 0x06
-#define CMD_WR_DISABLE 0x04
-#define CMD_READ_ID 0x9f
-#define CMD_RESET 0xff
-#define CMD_READ_REG 0x0f
-#define CMD_WRITE_REG 0x1f
-
-/* feature/ status reg */
-#define REG_BLOCK_LOCK 0xa0
-#define REG_OTP 0xb0
-#define REG_STATUS 0xc0/* timing */
-
-/* status */
-#define STATUS_OIP_MASK 0x01
-#define STATUS_READY 0
-#define STATUS_BUSY BIT(0)
-
-#define STATUS_E_FAIL_MASK 0x04
-#define STATUS_E_FAIL BIT(2)
-
-#define STATUS_P_FAIL_MASK 0x08
-#define STATUS_P_FAIL BIT(3)
-
-#define STATUS_ECC_MASK 0x30
-#define STATUS_ECC_1BIT_CORRECTED BIT(4)
-#define STATUS_ECC_ERROR BIT(5)
-#define STATUS_ECC_RESERVED (BIT(5) | BIT(4))
-
-/*ECC enable defines*/
-#define OTP_ECC_MASK 0x10
-#define OTP_ECC_OFF 0
-#define OTP_ECC_ON 1
-
-#define ECC_DISABLED
-#define ECC_IN_NAND
-#define ECC_SOFT
-
-/* block lock */
-#define BL_ALL_LOCKED 0x38
-#define BL_1_2_LOCKED 0x30
-#define BL_1_4_LOCKED 0x28
-#define BL_1_8_LOCKED 0x20
-#define BL_1_16_LOCKED 0x18
-#define BL_1_32_LOCKED 0x10
-#define BL_1_64_LOCKED 0x08
-#define BL_ALL_UNLOCKED 0
-
-struct spinand_info {
- struct spi_device *spi;
- void *priv;
-};
-
-struct spinand_state {
- u32 col;
- u32 row;
- int buf_ptr;
- u8 *buf;
-};
-
-struct spinand_cmd {
- u8 cmd;
- u32 n_addr; /* Number of address */
- u8 addr[3]; /* Reg Offset */
- u32 n_dummy; /* Dummy use */
- u32 n_tx; /* Number of tx bytes */
- u8 *tx_buf; /* Tx buf */
- u32 n_rx; /* Number of rx bytes */
- u8 *rx_buf; /* Rx buf */
-};
-
-int spinand_mtd(struct mtd_info *mtd);
-void spinand_mtd_release(struct mtd_info *mtd);
-
-#endif /* __LINUX_MTD_SPI_NAND_H */
--
2.17.1
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