--- /dev/null
+From 0501f76b138cf1dc11a313bb7a094da524b79337 Mon Sep 17 00:00:00 2001
+From: Mathieu Olivari <mathieu@codeaurora.org>
+Date: Thu, 13 Aug 2015 09:53:14 -0700
+Subject: [PATCH 3/3] mtd: add SMEM parser for QCOM platforms
+
+On QCOM platforms using MTD devices storage (such as IPQ806x), SMEM is
+used to store partition layout. This new parser can now be used to read
+SMEM and use it to register an MTD layout according to its content.
+
+Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
+---
+ drivers/mtd/Kconfig | 7 ++
+ drivers/mtd/Makefile | 1 +
+ drivers/mtd/qcom_smem_part.c | 231 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 239 insertions(+)
+ create mode 100644 drivers/mtd/qcom_smem_part.c
+
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -200,6 +200,13 @@ config MTD_MYLOADER_PARTS
+ You will still need the parsing functions to be called by the driver
+ for your particular device. It won't happen automatically.
+
++config MTD_QCOM_SMEM_PARTS
++ tristate "QCOM SMEM partitioning support"
++ depends on QCOM_SMEM
++ help
++ This provides partitions parser for QCOM devices using SMEM
++ such as IPQ806x.
++
+ comment "User Modules And Translation Layers"
+
+ #
+--- /dev/null
++++ b/drivers/mtd/qcom_smem_part.c
+@@ -0,0 +1,231 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * 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/kernel.h>
++#include <linux/device.h>
++#include <linux/slab.h>
++
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/partitions.h>
++#include <linux/spi/spi.h>
++#include <linux/module.h>
++
++#include <linux/soc/qcom/smem.h>
++
++/* Processor/host identifier for the application processor */
++#define SMEM_HOST_APPS 0
++
++/* SMEM items index */
++#define SMEM_AARM_PARTITION_TABLE 9
++#define SMEM_BOOT_FLASH_TYPE 421
++#define SMEM_BOOT_FLASH_BLOCK_SIZE 424
++
++/* SMEM Flash types */
++#define SMEM_FLASH_NAND 2
++#define SMEM_FLASH_SPI 6
++
++#define SMEM_PART_NAME_SZ 16
++#define SMEM_PARTS_MAX 32
++
++struct smem_partition {
++ char name[SMEM_PART_NAME_SZ];
++ __le32 start;
++ __le32 size;
++ __le32 attr;
++};
++
++struct smem_partition_table {
++ u8 magic[8];
++ __le32 version;
++ __le32 len;
++ struct smem_partition parts[SMEM_PARTS_MAX];
++};
++
++/* SMEM Magic values in partition table */
++static const u8 SMEM_PTABLE_MAGIC[] = {
++ 0xaa, 0x73, 0xee, 0x55,
++ 0xdb, 0xbd, 0x5e, 0xe3,
++};
++
++static int qcom_smem_get_flash_blksz(u64 **smem_blksz)
++{
++ int ret;
++ size_t size;
++
++ ret = qcom_smem_get(SMEM_HOST_APPS, SMEM_BOOT_FLASH_BLOCK_SIZE,
++ (void **) smem_blksz, &size);
++
++ if (ret < 0) {
++ pr_err("Unable to read flash blksz from SMEM\n");
++ return -ENOENT;
++ }
++
++ if (size != sizeof(**smem_blksz)) {
++ pr_err("Invalid flash blksz size in SMEM\n");
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static int qcom_smem_get_flash_type(u64 **smem_flash_type)
++{
++ int ret;
++ size_t size;
++
++ ret = qcom_smem_get(SMEM_HOST_APPS, SMEM_BOOT_FLASH_TYPE,
++ (void **) smem_flash_type, &size);
++
++ if (ret < 0) {
++ pr_err("Unable to read flash type from SMEM\n");
++ return -ENOENT;
++ }
++
++ if (size != sizeof(**smem_flash_type)) {
++ pr_err("Invalid flash type size in SMEM\n");
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static int qcom_smem_get_flash_partitions(struct smem_partition_table **pparts)
++{
++ int ret;
++ size_t size;
++
++ ret = qcom_smem_get(SMEM_HOST_APPS, SMEM_AARM_PARTITION_TABLE,
++ (void **) pparts, &size);
++
++ if (ret < 0) {
++ pr_err("Unable to read partition table from SMEM\n");
++ return -ENOENT;
++ }
++
++ return 0;
++}
++
++static int of_dev_node_match(struct device *dev, void *data)
++{
++ return dev->of_node == data;
++}
++
++static bool is_spi_device(struct device_node *np)
++{
++ struct device *dev;
++
++ dev = bus_find_device(&spi_bus_type, NULL, np, of_dev_node_match);
++ if (!dev)
++ return false;
++
++ put_device(dev);
++ return true;
++}
++
++static int parse_qcom_smem_partitions(struct mtd_info *master,
++ struct mtd_partition **pparts,
++ struct mtd_part_parser_data *data)
++{
++ struct smem_partition_table *smem_parts;
++ u64 *smem_flash_type, *smem_blksz;
++ struct mtd_partition *mtd_parts;
++ struct device_node *of_node = data->of_node;
++ int i, ret;
++
++ /*
++ * SMEM will only store the partition table of the boot device.
++ * If this is not the boot device, do not return any partition.
++ */
++ ret = qcom_smem_get_flash_type(&smem_flash_type);
++ if (ret < 0)
++ return ret;
++
++ if ((*smem_flash_type == SMEM_FLASH_NAND && !mtd_type_is_nand(master))
++ || (*smem_flash_type == SMEM_FLASH_SPI && !is_spi_device(of_node)))
++ return 0;
++
++ /*
++ * Just for sanity purpose, make sure the block size in SMEM matches the
++ * block size of the MTD device
++ */
++ ret = qcom_smem_get_flash_blksz(&smem_blksz);
++ if (ret < 0)
++ return ret;
++
++ if (*smem_blksz != master->erasesize) {
++ pr_err("SMEM block size differs from MTD block size\n");
++ return -EINVAL;
++ }
++
++ /* Get partition pointer from SMEM */
++ ret = qcom_smem_get_flash_partitions(&smem_parts);
++ if (ret < 0)
++ return ret;
++
++ if (memcmp(SMEM_PTABLE_MAGIC, smem_parts->magic,
++ sizeof(SMEM_PTABLE_MAGIC))) {
++ pr_err("SMEM partition magic invalid\n");
++ return -EINVAL;
++ }
++
++ /* Allocate and populate the mtd structures */
++ mtd_parts = kcalloc(le32_to_cpu(smem_parts->len), sizeof(*mtd_parts),
++ GFP_KERNEL);
++ if (!mtd_parts)
++ return -ENOMEM;
++
++ for (i = 0; i < smem_parts->len; i++) {
++ struct smem_partition *s_part = &smem_parts->parts[i];
++ struct mtd_partition *m_part = &mtd_parts[i];
++
++ m_part->name = s_part->name;
++ m_part->size = le32_to_cpu(s_part->size) * (*smem_blksz);
++ m_part->offset = le32_to_cpu(s_part->start) * (*smem_blksz);
++
++ /*
++ * The last SMEM partition may have its size marked as
++ * something like 0xffffffff, which means "until the end of the
++ * flash device". In this case, truncate it.
++ */
++ if (m_part->offset + m_part->size > master->size)
++ m_part->size = master->size - m_part->offset;
++ }
++
++ *pparts = mtd_parts;
++
++ return smem_parts->len;
++}
++
++static struct mtd_part_parser qcom_smem_parser = {
++ .owner = THIS_MODULE,
++ .parse_fn = parse_qcom_smem_partitions,
++ .name = "qcom-smem",
++};
++
++static int __init qcom_smem_parser_init(void)
++{
++ register_mtd_parser(&qcom_smem_parser);
++ return 0;
++}
++
++static void __exit qcom_smem_parser_exit(void)
++{
++ deregister_mtd_parser(&qcom_smem_parser);
++}
++
++module_init(qcom_smem_parser_init);
++module_exit(qcom_smem_parser_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Mathieu Olivari <mathieu@codeaurora.org>");
++MODULE_DESCRIPTION("Parsing code for SMEM based partition tables");
+--- a/drivers/mtd/Makefile
++++ b/drivers/mtd/Makefile
+@@ -16,6 +16,7 @@ obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o
+ obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
+ obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o
+ obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
++obj-$(CONFIG_MTD_QCOM_SMEM_PARTS) += qcom_smem_part.o
+
+ # 'Users' - code which presents functionality to userspace.
+ obj-$(CONFIG_MTD_BLKDEVS) += mtd_blkdevs.o
--- /dev/null
+From 0501f76b138cf1dc11a313bb7a094da524b79337 Mon Sep 17 00:00:00 2001
+From: Mathieu Olivari <mathieu@codeaurora.org>
+Date: Thu, 13 Aug 2015 09:53:14 -0700
+Subject: [PATCH 3/3] mtd: add SMEM parser for QCOM platforms
+
+On QCOM platforms using MTD devices storage (such as IPQ806x), SMEM is
+used to store partition layout. This new parser can now be used to read
+SMEM and use it to register an MTD layout according to its content.
+
+Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
+---
+ drivers/mtd/Kconfig | 7 ++
+ drivers/mtd/Makefile | 1 +
+ drivers/mtd/qcom_smem_part.c | 231 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 239 insertions(+)
+ create mode 100644 drivers/mtd/qcom_smem_part.c
+
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -200,6 +200,13 @@ config MTD_MYLOADER_PARTS
+ You will still need the parsing functions to be called by the driver
+ for your particular device. It won't happen automatically.
+
++config MTD_QCOM_SMEM_PARTS
++ tristate "QCOM SMEM partitioning support"
++ depends on QCOM_SMEM
++ help
++ This provides partitions parser for QCOM devices using SMEM
++ such as IPQ806x.
++
+ comment "User Modules And Translation Layers"
+
+ #
+--- /dev/null
++++ b/drivers/mtd/qcom_smem_part.c
+@@ -0,0 +1,231 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * 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/kernel.h>
++#include <linux/device.h>
++#include <linux/slab.h>
++
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/partitions.h>
++#include <linux/spi/spi.h>
++#include <linux/module.h>
++
++#include <linux/soc/qcom/smem.h>
++
++/* Processor/host identifier for the application processor */
++#define SMEM_HOST_APPS 0
++
++/* SMEM items index */
++#define SMEM_AARM_PARTITION_TABLE 9
++#define SMEM_BOOT_FLASH_TYPE 421
++#define SMEM_BOOT_FLASH_BLOCK_SIZE 424
++
++/* SMEM Flash types */
++#define SMEM_FLASH_NAND 2
++#define SMEM_FLASH_SPI 6
++
++#define SMEM_PART_NAME_SZ 16
++#define SMEM_PARTS_MAX 32
++
++struct smem_partition {
++ char name[SMEM_PART_NAME_SZ];
++ __le32 start;
++ __le32 size;
++ __le32 attr;
++};
++
++struct smem_partition_table {
++ u8 magic[8];
++ __le32 version;
++ __le32 len;
++ struct smem_partition parts[SMEM_PARTS_MAX];
++};
++
++/* SMEM Magic values in partition table */
++static const u8 SMEM_PTABLE_MAGIC[] = {
++ 0xaa, 0x73, 0xee, 0x55,
++ 0xdb, 0xbd, 0x5e, 0xe3,
++};
++
++static int qcom_smem_get_flash_blksz(u64 **smem_blksz)
++{
++ int ret;
++ size_t size;
++
++ ret = qcom_smem_get(SMEM_HOST_APPS, SMEM_BOOT_FLASH_BLOCK_SIZE,
++ (void **) smem_blksz, &size);
++
++ if (ret < 0) {
++ pr_err("Unable to read flash blksz from SMEM\n");
++ return -ENOENT;
++ }
++
++ if (size != sizeof(**smem_blksz)) {
++ pr_err("Invalid flash blksz size in SMEM\n");
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static int qcom_smem_get_flash_type(u64 **smem_flash_type)
++{
++ int ret;
++ size_t size;
++
++ ret = qcom_smem_get(SMEM_HOST_APPS, SMEM_BOOT_FLASH_TYPE,
++ (void **) smem_flash_type, &size);
++
++ if (ret < 0) {
++ pr_err("Unable to read flash type from SMEM\n");
++ return -ENOENT;
++ }
++
++ if (size != sizeof(**smem_flash_type)) {
++ pr_err("Invalid flash type size in SMEM\n");
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++static int qcom_smem_get_flash_partitions(struct smem_partition_table **pparts)
++{
++ int ret;
++ size_t size;
++
++ ret = qcom_smem_get(SMEM_HOST_APPS, SMEM_AARM_PARTITION_TABLE,
++ (void **) pparts, &size);
++
++ if (ret < 0) {
++ pr_err("Unable to read partition table from SMEM\n");
++ return -ENOENT;
++ }
++
++ return 0;
++}
++
++static int of_dev_node_match(struct device *dev, void *data)
++{
++ return dev->of_node == data;
++}
++
++static bool is_spi_device(struct device_node *np)
++{
++ struct device *dev;
++
++ dev = bus_find_device(&spi_bus_type, NULL, np, of_dev_node_match);
++ if (!dev)
++ return false;
++
++ put_device(dev);
++ return true;
++}
++
++static int parse_qcom_smem_partitions(struct mtd_info *master,
++ struct mtd_partition **pparts,
++ struct mtd_part_parser_data *data)
++{
++ struct smem_partition_table *smem_parts;
++ u64 *smem_flash_type, *smem_blksz;
++ struct mtd_partition *mtd_parts;
++ struct device_node *of_node = data->of_node;
++ int i, ret;
++
++ /*
++ * SMEM will only store the partition table of the boot device.
++ * If this is not the boot device, do not return any partition.
++ */
++ ret = qcom_smem_get_flash_type(&smem_flash_type);
++ if (ret < 0)
++ return ret;
++
++ if ((*smem_flash_type == SMEM_FLASH_NAND && !mtd_type_is_nand(master))
++ || (*smem_flash_type == SMEM_FLASH_SPI && !is_spi_device(of_node)))
++ return 0;
++
++ /*
++ * Just for sanity purpose, make sure the block size in SMEM matches the
++ * block size of the MTD device
++ */
++ ret = qcom_smem_get_flash_blksz(&smem_blksz);
++ if (ret < 0)
++ return ret;
++
++ if (*smem_blksz != master->erasesize) {
++ pr_err("SMEM block size differs from MTD block size\n");
++ return -EINVAL;
++ }
++
++ /* Get partition pointer from SMEM */
++ ret = qcom_smem_get_flash_partitions(&smem_parts);
++ if (ret < 0)
++ return ret;
++
++ if (memcmp(SMEM_PTABLE_MAGIC, smem_parts->magic,
++ sizeof(SMEM_PTABLE_MAGIC))) {
++ pr_err("SMEM partition magic invalid\n");
++ return -EINVAL;
++ }
++
++ /* Allocate and populate the mtd structures */
++ mtd_parts = kcalloc(le32_to_cpu(smem_parts->len), sizeof(*mtd_parts),
++ GFP_KERNEL);
++ if (!mtd_parts)
++ return -ENOMEM;
++
++ for (i = 0; i < smem_parts->len; i++) {
++ struct smem_partition *s_part = &smem_parts->parts[i];
++ struct mtd_partition *m_part = &mtd_parts[i];
++
++ m_part->name = s_part->name;
++ m_part->size = le32_to_cpu(s_part->size) * (*smem_blksz);
++ m_part->offset = le32_to_cpu(s_part->start) * (*smem_blksz);
++
++ /*
++ * The last SMEM partition may have its size marked as
++ * something like 0xffffffff, which means "until the end of the
++ * flash device". In this case, truncate it.
++ */
++ if (m_part->offset + m_part->size > master->size)
++ m_part->size = master->size - m_part->offset;
++ }
++
++ *pparts = mtd_parts;
++
++ return smem_parts->len;
++}
++
++static struct mtd_part_parser qcom_smem_parser = {
++ .owner = THIS_MODULE,
++ .parse_fn = parse_qcom_smem_partitions,
++ .name = "qcom-smem",
++};
++
++static int __init qcom_smem_parser_init(void)
++{
++ register_mtd_parser(&qcom_smem_parser);
++ return 0;
++}
++
++static void __exit qcom_smem_parser_exit(void)
++{
++ deregister_mtd_parser(&qcom_smem_parser);
++}
++
++module_init(qcom_smem_parser_init);
++module_exit(qcom_smem_parser_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Mathieu Olivari <mathieu@codeaurora.org>");
++MODULE_DESCRIPTION("Parsing code for SMEM based partition tables");
+--- a/drivers/mtd/Makefile
++++ b/drivers/mtd/Makefile
+@@ -16,6 +16,7 @@ obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o
+ obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
+ obj-$(CONFIG_MTD_BCM47XX_PARTS) += bcm47xxpart.o
+ obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
++obj-$(CONFIG_MTD_QCOM_SMEM_PARTS) += qcom_smem_part.o
+
+ # 'Users' - code which presents functionality to userspace.
+ obj-$(CONFIG_MTD_BLKDEVS) += mtd_blkdevs.o
projects / openwrt / openwrt.git / commitdiff