diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.1/037-mtd-add-SMEM-parser-for-QCOM-platforms.patch')
-rw-r--r-- | target/linux/ipq806x/patches-4.1/037-mtd-add-SMEM-parser-for-QCOM-platforms.patch | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/target/linux/ipq806x/patches-4.1/037-mtd-add-SMEM-parser-for-QCOM-platforms.patch b/target/linux/ipq806x/patches-4.1/037-mtd-add-SMEM-parser-for-QCOM-platforms.patch deleted file mode 100644 index 5fc54134de..0000000000 --- a/target/linux/ipq806x/patches-4.1/037-mtd-add-SMEM-parser-for-QCOM-platforms.patch +++ /dev/null @@ -1,277 +0,0 @@ -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 -@@ -195,6 +195,13 @@ 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 |