diff options
Diffstat (limited to 'target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch')
| -rw-r--r-- | target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch | 524 |
1 files changed, 524 insertions, 0 deletions
diff --git a/target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch b/target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch new file mode 100644 index 0000000000..1f1461061c --- /dev/null +++ b/target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch @@ -0,0 +1,524 @@ +From 7723e59d483a883578115a73eb87eb7fff0ff724 Mon Sep 17 00:00:00 2001 +From: Ezequiel Garcia <ezequiel.garcia@imgtec.com> +Date: Tue, 28 Feb 2017 10:37:24 +0000 +Subject: mtd: spi-nand: Support Gigadevice GD5F + +This commit uses the recently introduced SPI NAND framework to support +the Gigadevice GD5F serial NAND device. + +The current support includes: + + * Page read and page program operations (using on-die ECC) + * Page out-of-band read + * Erase + * Reset + * Device status retrieval + * Device ID retrieval + +(based on http://lists.infradead.org/pipermail/linux-mtd/2014-December/056769.html) + +Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> +Signed-off-by: Ian Pozella <Ian.Pozella@imgtec.com> +--- + drivers/mtd/spi-nand/Kconfig | 10 + + drivers/mtd/spi-nand/Makefile | 1 + + drivers/mtd/spi-nand/spi-nand-device.c | 472 +++++++++++++++++++++++++++++++++ + 3 files changed, 483 insertions(+) + create mode 100644 drivers/mtd/spi-nand/spi-nand-device.c + +--- a/drivers/mtd/spi-nand/Kconfig ++++ b/drivers/mtd/spi-nand/Kconfig +@@ -5,3 +5,13 @@ menuconfig MTD_SPI_NAND + help + This is the framework for the SPI NAND. + ++if MTD_SPI_NAND ++ ++config MTD_SPI_NAND_DEVICES ++ tristate "Support for SPI NAND devices" ++ default y ++ depends on MTD_SPI_NAND ++ help ++ Select this option if you require support for SPI NAND devices. ++ ++endif # MTD_SPI_NAND +--- a/drivers/mtd/spi-nand/Makefile ++++ b/drivers/mtd/spi-nand/Makefile +@@ -1 +1,2 @@ + obj-$(CONFIG_MTD_SPI_NAND) += spi-nand-base.o ++obj-$(CONFIG_MTD_SPI_NAND_DEVICES) += spi-nand-device.o +--- /dev/null ++++ b/drivers/mtd/spi-nand/spi-nand-device.c +@@ -0,0 +1,472 @@ ++/* ++ * Copyright (C) 2014 Imagination Technologies Ltd. ++ * ++ * 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; version 2 of the License. ++ * ++ * Notes: ++ * 1. We avoid using a stack-allocated buffer for SPI messages. Using ++ * a kmalloced buffer is probably better, given we shouldn't assume ++ * any particular usage by SPI core. ++ */ ++ ++#include <linux/device.h> ++#include <linux/err.h> ++#include <linux/errno.h> ++#include <linux/module.h> ++#include <linux/mtd/mtd.h> ++#include <linux/mtd/partitions.h> ++#include <linux/mtd/spi-nand.h> ++#include <linux/sizes.h> ++#include <linux/spi/spi.h> ++ ++/* SPI NAND commands */ ++#define SPI_NAND_WRITE_ENABLE 0x06 ++#define SPI_NAND_WRITE_DISABLE 0x04 ++#define SPI_NAND_GET_FEATURE 0x0f ++#define SPI_NAND_SET_FEATURE 0x1f ++#define SPI_NAND_PAGE_READ 0x13 ++#define SPI_NAND_READ_CACHE 0x03 ++#define SPI_NAND_FAST_READ_CACHE 0x0b ++#define SPI_NAND_READ_CACHE_X2 0x3b ++#define SPI_NAND_READ_CACHE_X4 0x6b ++#define SPI_NAND_READ_CACHE_DUAL_IO 0xbb ++#define SPI_NAND_READ_CACHE_QUAD_IO 0xeb ++#define SPI_NAND_READ_ID 0x9f ++#define SPI_NAND_PROGRAM_LOAD 0x02 ++#define SPI_NAND_PROGRAM_LOAD4 0x32 ++#define SPI_NAND_PROGRAM_EXEC 0x10 ++#define SPI_NAND_PROGRAM_LOAD_RANDOM 0x84 ++#define SPI_NAND_PROGRAM_LOAD_RANDOM4 0xc4 ++#define SPI_NAND_BLOCK_ERASE 0xd8 ++#define SPI_NAND_RESET 0xff ++ ++#define SPI_NAND_GD5F_READID_LEN 2 ++ ++#define SPI_NAND_GD5F_ECC_MASK (BIT(0) | BIT(1) | BIT(2)) ++#define SPI_NAND_GD5F_ECC_UNCORR (BIT(0) | BIT(1) | BIT(2)) ++#define SPI_NAND_GD5F_ECC_SHIFT 4 ++ ++static int spi_nand_gd5f_ooblayout_256_ecc(struct mtd_info *mtd, int section, ++ struct mtd_oob_region *oobregion) ++{ ++ if (section) ++ return -ERANGE; ++ ++ oobregion->offset = 128; ++ oobregion->length = 128; ++ ++ return 0; ++} ++ ++static int spi_nand_gd5f_ooblayout_256_free(struct mtd_info *mtd, int section, ++ struct mtd_oob_region *oobregion) ++{ ++ if (section) ++ return -ERANGE; ++ ++ oobregion->offset = 1; ++ oobregion->length = 127; ++ ++ return 0; ++} ++ ++static const struct mtd_ooblayout_ops spi_nand_gd5f_oob_256_ops = { ++ .ecc = spi_nand_gd5f_ooblayout_256_ecc, ++ .free = spi_nand_gd5f_ooblayout_256_free, ++}; ++ ++static struct nand_flash_dev spi_nand_flash_ids[] = { ++ { ++ .name = "SPI NAND 512MiB 3,3V", ++ .id = { NAND_MFR_GIGADEVICE, 0xb4 }, ++ .chipsize = 512, ++ .pagesize = SZ_4K, ++ .erasesize = SZ_256K, ++ .id_len = 2, ++ .oobsize = 256, ++ .ecc.strength_ds = 8, ++ .ecc.step_ds = 512, ++ }, ++ { ++ .name = "SPI NAND 512MiB 1,8V", ++ .id = { NAND_MFR_GIGADEVICE, 0xa4 }, ++ .chipsize = 512, ++ .pagesize = SZ_4K, ++ .erasesize = SZ_256K, ++ .id_len = 2, ++ .oobsize = 256, ++ .ecc.strength_ds = 8, ++ .ecc.step_ds = 512, ++ }, ++}; ++ ++enum spi_nand_device_variant { ++ SPI_NAND_GENERIC, ++ SPI_NAND_GD5F, ++}; ++ ++struct spi_nand_device_cmd { ++ ++ /* ++ * Command and address. I/O errors have been observed if a ++ * separate spi_transfer is used for command and address, ++ * so keep them together. ++ */ ++ u32 n_cmd; ++ u8 cmd[5]; ++ ++ /* Tx data */ ++ u32 n_tx; ++ u8 *tx_buf; ++ ++ /* Rx data */ ++ u32 n_rx; ++ u8 *rx_buf; ++ u8 rx_nbits; ++ u8 tx_nbits; ++}; ++ ++struct spi_nand_device { ++ struct spi_nand spi_nand; ++ struct spi_device *spi; ++ ++ struct spi_nand_device_cmd cmd; ++}; ++ ++static int spi_nand_send_command(struct spi_device *spi, ++ struct spi_nand_device_cmd *cmd) ++{ ++ struct spi_message message; ++ struct spi_transfer x[2]; ++ ++ if (!cmd->n_cmd) { ++ dev_err(&spi->dev, "cannot send an empty command\n"); ++ return -EINVAL; ++ } ++ ++ if (cmd->n_tx && cmd->n_rx) { ++ dev_err(&spi->dev, "cannot send and receive data at the same time\n"); ++ return -EINVAL; ++ } ++ ++ spi_message_init(&message); ++ memset(x, 0, sizeof(x)); ++ ++ /* Command and address */ ++ x[0].len = cmd->n_cmd; ++ x[0].tx_buf = cmd->cmd; ++ x[0].tx_nbits = cmd->tx_nbits; ++ spi_message_add_tail(&x[0], &message); ++ ++ /* Data to be transmitted */ ++ if (cmd->n_tx) { ++ x[1].len = cmd->n_tx; ++ x[1].tx_buf = cmd->tx_buf; ++ x[1].tx_nbits = cmd->tx_nbits; ++ spi_message_add_tail(&x[1], &message); ++ } ++ ++ /* Data to be received */ ++ if (cmd->n_rx) { ++ x[1].len = cmd->n_rx; ++ x[1].rx_buf = cmd->rx_buf; ++ x[1].rx_nbits = cmd->rx_nbits; ++ spi_message_add_tail(&x[1], &message); ++ } ++ ++ return spi_sync(spi, &message); ++} ++ ++static int spi_nand_device_reset(struct spi_nand *snand) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 1; ++ cmd->cmd[0] = SPI_NAND_RESET; ++ ++ dev_dbg(snand->dev, "%s\n", __func__); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_read_reg(struct spi_nand *snand, u8 opcode, u8 *buf) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 2; ++ cmd->cmd[0] = SPI_NAND_GET_FEATURE; ++ cmd->cmd[1] = opcode; ++ cmd->n_rx = 1; ++ cmd->rx_buf = buf; ++ ++ dev_dbg(snand->dev, "%s: reg 0%x\n", __func__, opcode); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_write_reg(struct spi_nand *snand, u8 opcode, u8 *buf) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 2; ++ cmd->cmd[0] = SPI_NAND_SET_FEATURE; ++ cmd->cmd[1] = opcode; ++ cmd->n_tx = 1; ++ cmd->tx_buf = buf; ++ ++ dev_dbg(snand->dev, "%s: reg 0%x\n", __func__, opcode); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_write_enable(struct spi_nand *snand) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 1; ++ cmd->cmd[0] = SPI_NAND_WRITE_ENABLE; ++ ++ dev_dbg(snand->dev, "%s\n", __func__); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_write_disable(struct spi_nand *snand) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 1; ++ cmd->cmd[0] = SPI_NAND_WRITE_DISABLE; ++ ++ dev_dbg(snand->dev, "%s\n", __func__); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_write_page(struct spi_nand *snand, ++ unsigned int page_addr) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 4; ++ cmd->cmd[0] = SPI_NAND_PROGRAM_EXEC; ++ cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16); ++ cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8); ++ cmd->cmd[3] = (u8)(page_addr & 0xff); ++ ++ dev_dbg(snand->dev, "%s: page 0x%x\n", __func__, page_addr); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_store_cache(struct spi_nand *snand, ++ unsigned int page_offset, size_t length, ++ u8 *write_buf) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ struct spi_device *spi = snand_dev->spi; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 3; ++ cmd->cmd[0] = spi->mode & SPI_TX_QUAD ? SPI_NAND_PROGRAM_LOAD4 : ++ SPI_NAND_PROGRAM_LOAD; ++ cmd->cmd[1] = (u8)((page_offset & 0xff00) >> 8); ++ cmd->cmd[2] = (u8)(page_offset & 0xff); ++ cmd->n_tx = length; ++ cmd->tx_buf = write_buf; ++ cmd->tx_nbits = spi->mode & SPI_TX_QUAD ? 4 : 1; ++ ++ dev_dbg(snand->dev, "%s: offset 0x%x\n", __func__, page_offset); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_load_page(struct spi_nand *snand, ++ unsigned int page_addr) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 4; ++ cmd->cmd[0] = SPI_NAND_PAGE_READ; ++ cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16); ++ cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8); ++ cmd->cmd[3] = (u8)(page_addr & 0xff); ++ ++ dev_dbg(snand->dev, "%s: page 0x%x\n", __func__, page_addr); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_read_cache(struct spi_nand *snand, ++ unsigned int page_offset, size_t length, ++ u8 *read_buf) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ struct spi_device *spi = snand_dev->spi; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ if ((spi->mode & SPI_RX_DUAL) || (spi->mode & SPI_RX_QUAD)) ++ cmd->n_cmd = 5; ++ else ++ cmd->n_cmd = 4; ++ cmd->cmd[0] = (spi->mode & SPI_RX_QUAD) ? SPI_NAND_READ_CACHE_X4 : ++ ((spi->mode & SPI_RX_DUAL) ? SPI_NAND_READ_CACHE_X2 : ++ SPI_NAND_READ_CACHE); ++ cmd->cmd[1] = 0; /* dummy byte */ ++ cmd->cmd[2] = (u8)((page_offset & 0xff00) >> 8); ++ cmd->cmd[3] = (u8)(page_offset & 0xff); ++ cmd->cmd[4] = 0; /* dummy byte */ ++ cmd->n_rx = length; ++ cmd->rx_buf = read_buf; ++ cmd->rx_nbits = (spi->mode & SPI_RX_QUAD) ? 4 : ++ ((spi->mode & SPI_RX_DUAL) ? 2 : 1); ++ ++ dev_dbg(snand->dev, "%s: offset 0x%x\n", __func__, page_offset); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_device_block_erase(struct spi_nand *snand, ++ unsigned int page_addr) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 4; ++ cmd->cmd[0] = SPI_NAND_BLOCK_ERASE; ++ cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16); ++ cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8); ++ cmd->cmd[3] = (u8)(page_addr & 0xff); ++ ++ dev_dbg(snand->dev, "%s: block 0x%x\n", __func__, page_addr); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static int spi_nand_gd5f_read_id(struct spi_nand *snand, u8 *buf) ++{ ++ struct spi_nand_device *snand_dev = snand->priv; ++ struct spi_nand_device_cmd *cmd = &snand_dev->cmd; ++ ++ memset(cmd, 0, sizeof(struct spi_nand_device_cmd)); ++ cmd->n_cmd = 1; ++ cmd->cmd[0] = SPI_NAND_READ_ID; ++ cmd->n_rx = SPI_NAND_GD5F_READID_LEN; ++ cmd->rx_buf = buf; ++ ++ dev_dbg(snand->dev, "%s\n", __func__); ++ ++ return spi_nand_send_command(snand_dev->spi, cmd); ++} ++ ++static void spi_nand_gd5f_ecc_status(unsigned int status, ++ unsigned int *corrected, ++ unsigned int *ecc_error) ++{ ++ unsigned int ecc_status = (status >> SPI_NAND_GD5F_ECC_SHIFT) & ++ SPI_NAND_GD5F_ECC_MASK; ++ ++ *ecc_error = (ecc_status == SPI_NAND_GD5F_ECC_UNCORR) ? 1 : 0; ++ if (*ecc_error == 0) ++ *corrected = (ecc_status > 1) ? (2 + ecc_status) : 0; ++} ++ ++static int spi_nand_device_probe(struct spi_device *spi) ++{ ++ enum spi_nand_device_variant variant; ++ struct spi_nand_device *priv; ++ struct spi_nand *snand; ++ int ret; ++ ++ priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ snand = &priv->spi_nand; ++ ++ snand->read_cache = spi_nand_device_read_cache; ++ snand->load_page = spi_nand_device_load_page; ++ snand->store_cache = spi_nand_device_store_cache; ++ snand->write_page = spi_nand_device_write_page; ++ snand->write_reg = spi_nand_device_write_reg; ++ snand->read_reg = spi_nand_device_read_reg; ++ snand->block_erase = spi_nand_device_block_erase; ++ snand->reset = spi_nand_device_reset; ++ snand->write_enable = spi_nand_device_write_enable; ++ snand->write_disable = spi_nand_device_write_disable; ++ snand->dev = &spi->dev; ++ snand->priv = priv; ++ ++ /* This'll mean we won't need to specify any specific compatible string ++ * for a given device, and instead just support spi-nand. ++ */ ++ variant = spi_get_device_id(spi)->driver_data; ++ switch (variant) { ++ case SPI_NAND_GD5F: ++ snand->read_id = spi_nand_gd5f_read_id; ++ snand->get_ecc_status = spi_nand_gd5f_ecc_status; ++ snand->ooblayout = &spi_nand_gd5f_oob_256_ops; ++ break; ++ default: ++ dev_err(snand->dev, "unknown device\n"); ++ return -ENODEV; ++ } ++ ++ spi_set_drvdata(spi, snand); ++ priv->spi = spi; ++ ++ ret = spi_nand_register(snand, spi_nand_flash_ids); ++ if (ret) ++ return ret; ++ return 0; ++} ++ ++static int spi_nand_device_remove(struct spi_device *spi) ++{ ++ struct spi_nand *snand = spi_get_drvdata(spi); ++ ++ spi_nand_unregister(snand); ++ ++ return 0; ++} ++ ++const struct spi_device_id spi_nand_id_table[] = { ++ { "spi-nand", SPI_NAND_GENERIC }, ++ { "gd5f", SPI_NAND_GD5F }, ++ { }, ++}; ++MODULE_DEVICE_TABLE(spi, spi_nand_id_table); ++ ++static struct spi_driver spi_nand_device_driver = { ++ .driver = { ++ .name = "spi_nand_device", ++ .owner = THIS_MODULE, ++ }, ++ .id_table = spi_nand_id_table, ++ .probe = spi_nand_device_probe, ++ .remove = spi_nand_device_remove, ++}; ++module_spi_driver(spi_nand_device_driver); ++ ++MODULE_AUTHOR("Ezequiel Garcia <ezequiel.garcia@imgtec.com>"); ++MODULE_DESCRIPTION("SPI NAND device support"); ++MODULE_LICENSE("GPL v2"); |