From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752590AbbBKExF (ORCPT ); Tue, 10 Feb 2015 23:53:05 -0500 Received: from mail-we0-f170.google.com ([74.125.82.170]:37746 "EHLO mail-we0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751703AbbBKExD (ORCPT ); Tue, 10 Feb 2015 23:53:03 -0500 MIME-Version: 1.0 Date: Wed, 11 Feb 2015 12:53:00 +0800 Message-ID: Subject: [PATCH v2] mtd:spi-nor: Add Altera EPCQ Driver From: Viet Nga Dao To: Brian Norris , David Woodhouse Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, nga_chi86 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Viet Nga Dao Altera EPCQ Controller is a soft IP which enables access to Altera EPCQ and EPCS flash chips. This patch adds driver for these devices. Signed-off-by: VIET NGA DAO --- v2: - Change to spi_nor structure - Add lock and unlock functions for spi_nor - Simplify the altera_epcq_lock function - Replace reg by compatible in device tree --- .../devicetree/bindings/mtd/altera_epcq.txt | 45 ++ drivers/mtd/spi-nor/Kconfig | 12 + drivers/mtd/spi-nor/Makefile | 1 + drivers/mtd/spi-nor/altera_epcq.c | 507 ++++++++++++++++++++ drivers/mtd/spi-nor/altera_epcq.h | 116 +++++ drivers/mtd/spi-nor/spi-nor.c | 86 ++++- include/linux/mtd/spi-nor.h | 3 +- 7 files changed, 764 insertions(+), 6 deletions(-) create mode 100644 Documentation/devicetree/bindings/mtd/altera_epcq.txt create mode 100644 drivers/mtd/spi-nor/altera_epcq.c create mode 100644 drivers/mtd/spi-nor/altera_epcq.h diff --git a/Documentation/devicetree/bindings/mtd/altera_epcq.txt b/Documentation/devicetree/bindings/mtd/altera_epcq.txt new file mode 100644 index 0000000..b6b5e61 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/altera_epcq.txt @@ -0,0 +1,45 @@ +* MTD Altera EPCQ driver + +Required properties: +- compatible: Should be "altr,epcq-1.0" +- reg: Address and length of the register set for the device. It contains + the information of registers in the same order as described by reg-names +- reg-names: Should contain the reg names + "csr_base": Should contain the register configuration base address + "data_base": Should contain the data base address +- is-epcs: boolean type. + If present, the device contains EPCS flashes. + Otherwise, it contains EPCQ flashes. +- #address-cells: Must be <1>. +- #size-cells: Must be <0>. +- flash device tree subnode, there must be a node with the following fields: + - compatible: Should contain the flash name + - #address-cells: please refer to /mtd/partition.txt + - #size-cells: please refer to /mtd/partition.txt + For partitions inside each flash, please refer to /mtd/partition.txt + +Example: + + epcq_controller_0: epcq@0x000000000 { + compatible = "altr,epcq-1.0"; + reg = <0x00000001 0x00000000 0x00000020>, + <0x00000000 0x00000000 0x02000000>; + reg-names = "csr_base", "data_base"; + #address-cells = <1>; + #size-cells = <0>; + flash0: epcq256@0 { + compatible = "epcq256"; + #address-cells = <1>; + #size-cells = <1>; + partition@0 { + /* 16 MB for raw data. */ + label = "EPCQ Flash 0 raw data"; + reg = <0x0 0x1000000>; + }; + partition@1000000 { + /* 16 MB for jffs2 data. */ + label = "EPCQ Flash 0 JFFS 2"; + reg = <0x1000000 0x1000000>; + }; + }; + }; //end epcq@0x000000000 (epcq_controller_0) diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig index 64a4f0e..83178b9 100644 --- a/drivers/mtd/spi-nor/Kconfig +++ b/drivers/mtd/spi-nor/Kconfig @@ -28,4 +28,16 @@ config SPI_FSL_QUADSPI This enables support for the Quad SPI controller in master mode. We only connect the NOR to this controller now. +config SPI_ALTERA_EPCQ + tristate "Support Altera EPCQ/EPCS Flash chips" + depends on OF + help + This enables access to Altera EPCQ/EPCS flash chips, used for data + storage. See the driver source for the current list, + or to add other chips. + + If you want to compile this driver as a module ( = code which can be + inserted in and removed from the running kernel whenever you want), + say M here and read . + endif # MTD_SPI_NOR diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile index 6a7ce14..ff9437b 100644 --- a/drivers/mtd/spi-nor/Makefile +++ b/drivers/mtd/spi-nor/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_MTD_SPI_NOR) += spi-nor.o obj-$(CONFIG_SPI_FSL_QUADSPI) += fsl-quadspi.o +obj-$(CONFIG_SPI_ALTERA_EPCQ) += altera_epcq.o diff --git a/drivers/mtd/spi-nor/altera_epcq.c b/drivers/mtd/spi-nor/altera_epcq.c new file mode 100644 index 0000000..9db0d05 --- /dev/null +++ b/drivers/mtd/spi-nor/altera_epcq.c @@ -0,0 +1,507 @@ +/* + * Copyright (C) 2014 Altera Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "altera_epcq.h" + +static int altera_epcq_write_reg(struct spi_nor *nor, u8 opcode, u8 *val, + int len, int wr_en) +{ + return 0; +} + +static int altera_epcq_read_reg(struct spi_nor *nor, u8 opcode, u8 *val, + int len) +{ + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + u32 data = 0; + u8 id[5]; + + switch (opcode) { + case SPINOR_OP_RDSR: + data = readl(dev->csr_base + EPCQ_SR_REG); + *val = (u8)data & EPCQ_SR_MASK; + break; + case SPINOR_OP_RDID: + /* opcode id */ + if (dev->is_epcs) { + data = readl(dev->csr_base + EPCQ_SID_REG); + id[4] = EPCS_OPCODE_ID; + } else { + data = readl(dev->csr_base + EPCQ_RDID_REG); + id[4] = EPCQ_OPCODE_ID; + } + id[0] = 0xFF; /* non standard jedec id */ + id[1] = 0xFF; /* non standard jedec id */ + id[2] = 0xFF; /* non standard jedec id */ + id[3] = (u8)data & EPCQ_ID_MASK; /* device id */ + memcpy(val, &id, 5); + break; + default: + break; + } + return 0; +} + +static int altera_epcq_write_erase_check(struct spi_nor *nor, + bool write_erase) +{ + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + u32 val; + u32 mask; + + if (write_erase) + mask = EPCQ_ISR_ILLEGAL_WRITE_MASK; + else + mask = EPCQ_ISR_ILLEGAL_ERASE_MASK; + + val = readl(dev->csr_base + EPCQ_ISR_REG); + if (val & mask) { + dev_err(nor->dev, + "write/erase failed, sector might be protected\n"); + /* clear this status for next use */ + writel(val, dev->csr_base + EPCQ_ISR_REG); + return -EIO; + } + return 0; +} + +static int altera_epcq_addr_to_sector(struct mtd_info *mtd, int offset) +{ + if (mtd->erasesize_shift) + return offset >> mtd->erasesize_shift; + do_div(offset, mtd->erasesize); + return offset; +} + +static int altera_epcq_erase(struct spi_nor *nor, loff_t offset) +{ + + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + struct mtd_info *mtd = &flash->mtd; + u32 val; + int ret; + int sector_value; + + ret = nor->wait_till_ready(nor); + if (ret) + return ret; + + sector_value = altera_epcq_addr_to_sector(mtd, offset); + /* sanity check that block_offset is a valid sector number */ + if (sector_value < 0) + return -EINVAL; + + /* sector value should occupy bits 17:8 */ + val = (sector_value << 8) & EPCQ_MEM_OP_SECTOR_VALUE_MASK; + + /* sector erase commands occupies lower 2 bits */ + val |= EPCQ_MEM_OP_SECTOR_ERASE_CMD; + + /* write sector erase command to EPCQ_MEM_OP register */ + writel(val, dev->csr_base + EPCQ_MEM_OP_REG); + + /* wait the erase command is done then check whether + * write triggered a illegal write interrupt + */ + ret = nor->wait_till_ready(nor); + if (ret) + return ret; + + ret = altera_epcq_write_erase_check(nor, 0); + if (ret < 0) + return ret; + + return 0; +} + +static int altera_epcq_read(struct spi_nor *nor, loff_t from, size_t len, + size_t *retlen, u_char *buf) +{ + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + int ret = 0; + + mutex_lock(&flash->lock); + /* wait till previous write/erase is done. */ + ret = nor->wait_till_ready(nor); + if (ret) + goto err; + + memcpy_fromio(buf, dev->data_base + from, len); + *retlen = len; + +err: + mutex_unlock(&flash->lock); + return ret; +} + +static void altera_epcq_write(struct spi_nor *nor, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + int ret = 0; + + mutex_lock(&flash->lock); + + /* wait until finished previous write command */ + ret = nor->wait_till_ready(nor); + if (ret) + goto err; + + memcpy_toio(dev->data_base + to, buf, len); + *retlen += len; + + /* wait until finished write command then + * check whether write triggered a illegal write interrupt + */ + ret = nor->wait_till_ready(nor); + if (ret) + goto err; + + ret = altera_epcq_write_erase_check(nor, 1); + if (ret < 0) + goto err; + +err: + mutex_unlock(&flash->lock); +} + +static int altera_epcq_lock(struct spi_nor *nor, loff_t ofs, uint64_t len) +{ + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + struct mtd_info *mtd = &flash->mtd; + uint32_t offset = ofs; + int ret = 0; + u32 sector_start, sector_end; + u32 num_sectors; + u32 mem_op; + u32 sr_bp; + u32 sr_tb; + + sector_start = offset; + sector_end = altera_epcq_addr_to_sector(mtd, offset + len); + num_sectors = mtd->size; + do_div(num_sectors, mtd->erasesize); + + dev_dbg(nor->dev, "%s: sector start is %u,sector end is %u\n", + __func__, sector_start, sector_end); + + mutex_lock(&flash->lock); + /* wait until finished previous write command. */ + ret = nor->wait_till_ready(nor); + if (ret) + goto err; + + if (sector_start >= num_sectors / 2) { + sr_bp = fls(num_sectors - 1 - sector_start) + 1; + sr_tb = 0; + } else if ((sector_end < num_sectors / 2) && ~dev->is_epcs) { + sr_bp = fls(sector_end) + 1; + sr_tb = 1; + } else { + sr_bp = 16; + sr_tb = 0; + } + + mem_op = (sr_tb << 12) | (sr_bp << 8); + mem_op &= EPCQ_MEM_OP_SECTOR_PROTECT_VALUE_MASK; + mem_op |= EPCQ_MEM_OP_SECTOR_PROTECT_CMD; + writel(mem_op, dev->csr_base + EPCQ_MEM_OP_REG); + +err: + mutex_unlock(&flash->lock); + return ret; +} + +static int altera_epcq_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len) +{ + struct altera_epcq_flash *flash = nor->priv; + struct altera_epcq *dev = flash->priv; + int ret = 0; + u32 mem_op; + + mutex_lock(&flash->lock); + /* wait until finished previous write command. */ + ret = nor->wait_till_ready(nor); + if (ret) + goto err; + dev_info(nor->dev, "Unlock all protected area\n"); + mem_op = 0; + mem_op &= EPCQ_MEM_OP_SECTOR_PROTECT_VALUE_MASK; + mem_op |= EPCQ_MEM_OP_SECTOR_PROTECT_CMD; + writel(mem_op, dev->csr_base + EPCQ_MEM_OP_REG); + +err: + mutex_unlock(&flash->lock); + return ret; +} + +static void altera_epcq_chip_select(struct altera_epcq *dev, u32 bank) +{ + u32 val = 0; + + switch (bank) { + case 0: + val = EPCQ_CHIP_SELECT_0; + break; + case 1: + val = EPCQ_CHIP_SELECT_1; + break; + case 2: + val = EPCQ_CHIP_SELECT_2; + break; + default: + return; + } + writel(val, dev->csr_base + EPCQ_CHIP_SELECT_REG); +} + + +static int altera_epcq_probe_config_dt(struct platform_device *pdev, + struct device_node *np, + struct altera_epcq_plat_data *pdata) +{ + struct device_node *pp = NULL; + struct resource *epcq_res; + int i = 0; + + pdata->is_epcs = of_property_read_bool(np, "is-epcs"); + + epcq_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "csr_base"); + pdata->csr_base = devm_ioremap_resource(&pdev->dev, epcq_res); + if (IS_ERR(pdata->csr_base)) { + dev_err(&pdev->dev, "%s: ERROR: failed to map csr base\n", + __func__); + return PTR_ERR(pdata->csr_base); + } + + epcq_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "data_base"); + pdata->data_base = devm_ioremap_resource(&pdev->dev, epcq_res); + if (IS_ERR(pdata->data_base)) { + dev_err(&pdev->dev, "%s: ERROR: failed to map data base\n", + __func__); + return PTR_ERR(pdata->data_base); + } + + /* Fill structs for each subnode (flash device) */ + for_each_available_child_of_node(np, pp) { + /* Read bank id from DT */ + pdata->np[i] = pp; + i++; + } + pdata->num_flashes = i; + return 0; +} + +static int altera_epcq_setup_banks(struct platform_device *pdev, + u32 bank, struct device_node *np) +{ + struct altera_epcq *dev = platform_get_drvdata(pdev); + struct mtd_part_parser_data ppdata = {}; + struct altera_epcq_flash *flash; + struct spi_nor *nor; + int ret = 0; + char modalias[40]; + + altera_epcq_chip_select(dev, bank); + + if (bank > dev->num_flashes - 1) + return -EINVAL; + + flash = devm_kzalloc(&pdev->dev, sizeof(*flash), GFP_KERNEL); + if (!flash) + return -ENOMEM; + + mutex_init(&flash->lock); + + dev->flash[bank] = flash; + nor = &flash->nor; + nor->mtd = &flash->mtd; + nor->dev = &pdev->dev; + nor->priv = flash; + flash->mtd.priv = nor; + flash->priv = dev; + + /* spi nor framework*/ + nor->read_reg = altera_epcq_read_reg; + nor->write_reg = altera_epcq_write_reg; + nor->read = altera_epcq_read; + nor->write = altera_epcq_write; + nor->erase = altera_epcq_erase; + nor->_lock = altera_epcq_lock; + nor->_unlock = altera_epcq_unlock; + + if (of_modalias_node(np, modalias, sizeof(modalias)) < 0) + return -EINVAL; + + ret = spi_nor_scan(nor, modalias, SPI_NOR_QUAD); + if (ret) + return ret; + ppdata.of_node = np; + + return mtd_device_parse_register(&flash->mtd, NULL, &ppdata, NULL, 0); +} + +static int altera_epcq_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct altera_epcq_plat_data *pdata = NULL; + struct altera_epcq *dev; + int ret = 0; + int i; + + if (!np) { + ret = -ENODEV; + dev_err(&pdev->dev, "no device found\n"); + goto err; + } + + pdata = devm_kzalloc(&pdev->dev, + sizeof(struct altera_epcq_plat_data), + GFP_KERNEL); + + if (!pdata) { + ret = -ENOMEM; + goto err; + } + + ret = altera_epcq_probe_config_dt(pdev, np, pdata); + if (ret) { + ret = -ENODEV; + dev_err(&pdev->dev, "probe fail\n"); + goto err; + } + + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_ATOMIC); + if (!dev) { + ret = -ENOMEM; + goto err; + } + mutex_init(&dev->lock); + dev->is_epcs = pdata->is_epcs; + dev->csr_base = pdata->csr_base; + dev->data_base = pdata->data_base; + + /* check number of flashes */ + dev->num_flashes = pdata->num_flashes; + if (dev->num_flashes > MAX_NUM_FLASH_CHIP) { + dev_err(&pdev->dev, "exceeding max number of flashes\n"); + dev->num_flashes = MAX_NUM_FLASH_CHIP; + } + + /* check clock */ + dev->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(dev->clk)) { + ret = PTR_ERR(dev->clk); + goto err; + } + ret = clk_prepare_enable(dev->clk); + if (ret) + goto err; + + platform_set_drvdata(pdev, dev); + + /* loop for each flash which is connected to epcq */ + for (i = 0; i < dev->num_flashes; i++) { + ret = altera_epcq_setup_banks(pdev, i, pdata->np[i]); + if (ret) { + dev_err(&pdev->dev, "bank setup failed\n"); + goto err_bank_setup; + } + } + + return 0; + +err_bank_setup: + clk_disable_unprepare(dev->clk); +err: + return ret; +} + +static int altera_epcq_remove(struct platform_device *pdev) +{ + struct altera_epcq *dev; + struct altera_epcq_flash *flash; + int ret, i; + + dev = platform_get_drvdata(pdev); + + /* clean up for all nor flash */ + for (i = 0; i < dev->num_flashes; i++) { + flash = dev->flash[i]; + if (!flash) + continue; + + /* clean up mtd stuff */ + ret = mtd_device_unregister(&flash->mtd); + if (ret) + dev_err(&pdev->dev, "error removing mtd\n"); + } + + clk_disable_unprepare(dev->clk); + + return 0; +} + +static const struct of_device_id altera_epcq_id_table[] = { + { .compatible = "altr,epcq-1.0" }, + {} +}; +MODULE_DEVICE_TABLE(of, altera_epcq_id_table); + +static struct platform_driver altera_epcq_driver = { + .driver = { + .name = ALTERA_EPCQ_RESOURCE_NAME, + .bus = &platform_bus_type, + .of_match_table = altera_epcq_id_table, + }, + .probe = altera_epcq_probe, + .remove = altera_epcq_remove, +}; +module_platform_driver(altera_epcq_driver); + +MODULE_AUTHOR("Viet Nga Dao "); +MODULE_DESCRIPTION("Altera EPCQ Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/mtd/spi-nor/altera_epcq.h b/drivers/mtd/spi-nor/altera_epcq.h new file mode 100644 index 0000000..bc29f65 --- /dev/null +++ b/drivers/mtd/spi-nor/altera_epcq.h @@ -0,0 +1,116 @@ +/* + * Copyright (C) 2014 Altera Corporation. All rights reserved + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see . + */ + +#ifndef __ALTERA_ECPQ_H +#define __ALTERA_ECPQ_H + +#define ALTERA_EPCQ_RESOURCE_NAME "altera_epcq" +/* max possible slots for serial flash chip in the EPCQ controller */ +#define MAX_NUM_FLASH_CHIP 3 +#define EPCS_OPCODE_ID 1 +#define EPCQ_OPCODE_ID 2 + +struct altera_epcq_plat_data { + void __iomem *csr_base; + void __iomem *data_base; + bool is_epcs; + u32 num_flashes; + struct device_node *np[MAX_NUM_FLASH_CHIP]; +}; + +struct altera_epcq { + struct clk *clk; + bool is_epcs; + struct mutex lock; /*device lock*/ + void __iomem *csr_base; + void __iomem *data_base; + u32 num_flashes; + struct altera_epcq_flash *flash[MAX_NUM_FLASH_CHIP]; +}; + +struct altera_epcq_flash { + struct mutex lock; /*flash lock*/ + struct mtd_info mtd; + struct spi_nor nor; + void *priv; +}; + +/* Define max times to check status register before we give up. */ +#define EPCQ_MAX_TIME_OUT (40 * HZ) + +/* defines for status register */ +#define EPCQ_SR_REG 0x0 +#define EPCQ_SR_WIP_MASK 0x00000001 +#define EPCQ_SR_WIP 0x1 +#define EPCQ_SR_WEL 0x2 +#define EPCQ_SR_BP0 0x4 +#define EPCQ_SR_BP1 0x8 +#define EPCQ_SR_BP2 0x10 +#define EPCQ_SR_BP3 0x40 +#define EPCQ_SR_TB 0x20 +#define EPCQ_SR_MASK 0x0000000F + +/* defines for device id register */ +#define EPCQ_SID_REG 0x4 +#define EPCQ_RDID_REG 0x8 +#define EPCQ_ID_MASK 0x000000FF + +/* + * EPCQ_MEM_OP register offset + * + * The EPCQ_MEM_OP register is used to do memory protect and erase operations + * + */ +#define EPCQ_MEM_OP_REG 0xC + +#define EPCQ_MEM_OP_CMD_MASK 0x00000003 +#define EPCQ_MEM_OP_BULK_ERASE_CMD 0x00000001 +#define EPCQ_MEM_OP_SECTOR_ERASE_CMD 0x00000002 +#define EPCQ_MEM_OP_SECTOR_PROTECT_CMD 0x00000003 +#define EPCQ_MEM_OP_SECTOR_VALUE_MASK 0x0003FF00 +#define EPCQ_MEM_OP_SECTOR_PROTECT_VALUE_MASK 0x00001F00 +#define EPCQ_MEM_OP_SECTOR_PROTECT_SHIFT 8 +/* + * EPCQ_ISR register offset + * + * The EPCQ_ISR register is used to determine whether an invalid write or erase + * operation trigerred an interrupt + * + */ +#define EPCQ_ISR_REG 0x10 + +#define EPCQ_ISR_ILLEGAL_ERASE_MASK 0x00000001 +#define EPCQ_ISR_ILLEGAL_WRITE_MASK 0x00000002 + +/* + * EPCQ_IMR register offset + * + * The EPCQ_IMR register is used to mask the invalid erase or the invalid write + * interrupts. + * + */ +#define EPCQ_IMR_REG 0x14 +#define EPCQ_IMR_ILLEGAL_ERASE_MASK 0x00000001 + +#define EPCQ_IMR_ILLEGAL_WRITE_MASK 0x00000002 + +#define EPCQ_CHIP_SELECT_REG 0x18 +#define EPCQ_CHIP_SELECT_MASK 0x00000007 +#define EPCQ_CHIP_SELECT_0 0x00000001 +#define EPCQ_CHIP_SELECT_1 0x00000002 +#define EPCQ_CHIP_SELECT_2 0x00000004 + +#endif /* __ALTERA_ECPQ_H */ diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 3b8a411..bfbb274 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -330,7 +330,7 @@ erase_err: return ret; } -static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) +static int stmicro_spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) { struct spi_nor *nor = mtd_to_spi_nor(mtd); uint32_t offset = ofs; @@ -377,7 +377,8 @@ err: return ret; } -static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) +static int stmicro_spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, + uint64_t len) { struct spi_nor *nor = mtd_to_spi_nor(mtd); uint32_t offset = ofs; @@ -424,6 +425,48 @@ err: return ret; } +static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len) +{ + struct spi_nor *nor = mtd_to_spi_nor(mtd); + int ret = 0; + + ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_LOCK); + if (ret) + return ret; + + /* Wait until finished previous command */ + ret = wait_till_ready(nor); + if (ret) + goto err; + + ret = nor->_lock(nor, ofs, len); + +err: + spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK); + return ret; +} + +static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len) +{ + struct spi_nor *nor = mtd_to_spi_nor(mtd); + int ret = 0; + + ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_LOCK); + if (ret) + return ret; + + /* Wait until finished previous command */ + ret = wait_till_ready(nor); + if (ret) + goto err; + + ret = nor->_unlock(nor, ofs, len); + +err: + spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK); + return ret; +} + struct flash_info { /* JEDEC id zero means "no ID" (most older chips); otherwise it has * a high byte of zero plus three data bytes: the manufacturer id, @@ -442,6 +485,7 @@ struct flash_info { u16 addr_width; u16 flags; + u8 altera_flash_opcode_id; #define SECT_4K 0x01 /* SPINOR_OP_BE_4K works uniformly */ #define SPI_NOR_NO_ERASE 0x02 /* No erase command needed */ #define SST_WRITE 0x04 /* use SST byte programming */ @@ -471,6 +515,16 @@ struct flash_info { .flags = (_flags), \ }) + +#define EPCQ_INFO(_opcode_id, _ext_id, _sector_size, _n_sectors, _page_size) \ + ((kernel_ulong_t)&(struct flash_info) { \ + .altera_flash_opcode_id = (_opcode_id), \ + .ext_id = (_ext_id), \ + .sector_size = (_sector_size), \ + .n_sectors = (_n_sectors), \ + .page_size = (_page_size), \ + }) + /* NOTE: double check command sets and memory organization when you add * more nor chips. This current list focusses on newer chips, which * have been converging on command sets which including JEDEC ID. @@ -637,6 +691,17 @@ static const struct spi_device_id spi_nor_ids[] = { { "cat25c09", CAT25_INFO( 128, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) }, { "cat25c17", CAT25_INFO( 256, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) }, { "cat25128", CAT25_INFO(2048, 8, 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) }, + + /* Altera EPCQ/EPCS Flashes */ + { "epcq16" , EPCQ_INFO(2, 0x15, 0x10000, 32, 0x100) }, + { "epcq32" , EPCQ_INFO(2, 0x16, 0x10000, 64, 0x100) }, + { "epcq64" , EPCQ_INFO(2, 0x17, 0x10000, 128, 0x100) }, + { "epcq128" , EPCQ_INFO(2, 0x18, 0x10000, 256, 0x100) }, + { "epcq256" , EPCQ_INFO(2, 0x19, 0x10000, 512, 0x100) }, + { "epcq512" , EPCQ_INFO(2, 0x20, 0x10000, 1024, 0x100) }, + { "epcs16" , EPCQ_INFO(1, 0x14, 0x10000, 32, 0x100) }, + { "epcs64" , EPCQ_INFO(1, 0x16, 0x10000, 128, 0x100) }, + { "epcs128" , EPCQ_INFO(1, 0x18, 0x40000, 256, 0x100) }, { }, }; @@ -666,6 +731,14 @@ static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor) if (info->jedec_id == jedec) { if (info->ext_id == 0 || info->ext_id == ext_jedec) return &spi_nor_ids[tmp]; + + /* altera epcq which is non jedec device + * use id[4] as opcode id to differentiate + * epcs and epcq devices + */ + } else if (info->altera_flash_opcode_id == id[4] && + info->ext_id == id[3]) { + return &spi_nor_ids[tmp]; } } dev_err(nor->dev, "unrecognized JEDEC id %06x\n", jedec); @@ -904,7 +977,8 @@ static void spi_nor_shutdown(struct spi_nor *nor) static int spi_nor_check(struct spi_nor *nor) { if (!nor->dev || !nor->read || !nor->write || - !nor->read_reg || !nor->write_reg || !nor->erase) { + !nor->read_reg || !nor->write_reg || !nor->erase || + !nor->_lock || !nor->_unlock) { pr_err("spi-nor: please fill all the necessary fields!\n"); return -EINVAL; } @@ -939,9 +1013,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) info = (void *)id->driver_data; - if (info->jedec_id) { + if (info->jedec_id || info->altera_flash_opcode_id) { const struct spi_device_id *jid; - jid = nor->read_id(nor); if (IS_ERR(jid)) { return PTR_ERR(jid); @@ -987,6 +1060,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) /* nor protection support for STmicro chips */ if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ST) { + mtd->_lock = stmicro_spi_nor_lock; + mtd->_unlock = stmicro_spi_nor_unlock; + } else { mtd->_lock = spi_nor_lock; mtd->_unlock = spi_nor_unlock; } diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 29d1a0d..042bed2 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -183,7 +183,8 @@ struct spi_nor { void (*write)(struct spi_nor *nor, loff_t to, size_t len, size_t *retlen, const u_char *write_buf); int (*erase)(struct spi_nor *nor, loff_t offs); - + int (*_lock)(struct spi_nor *nor, loff_t offs, uint64_t len); + int (*_unlock)(struct spi_nor *nor, loff_t offs, uint64_t len); void *priv; }; -- 1.7.7.4