From 004f15b6000e220b74433b190e60805ce8776d92 Mon Sep 17 00:00:00 2001 From: "Poddar, Sourav" Date: Mon, 7 Oct 2013 15:53:01 +0530 Subject: sf: Add memory mapped read support Qspi controller can have a memory mapped port which can be used for data read. Added support to enable memory mapped port read. This patch enables the following: - It enables exchange of memory map address between mtd and qspi through the introduction of "memory_map" flag. - Add support to communicate to the driver that memory mapped transfer is to be started through introduction of new flags like "SPI_XFER_MEM_MAP" and "SPI_XFER_MEM_MAP_END". This will enable the spi controller to do memory mapped configurations if required. Signed-off-by: Sourav Poddar Reviewed-by: Jagannadha Sutradharudu Teki --- drivers/mtd/spi/sf_ops.c | 2 ++ drivers/mtd/spi/sf_probe.c | 1 + 2 files changed, 3 insertions(+) (limited to 'drivers') diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index c009af5..2396e22 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -269,7 +269,9 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, /* Handle memory-mapped SPI */ if (flash->memory_map) { + spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP); memcpy(data, flash->memory_map + offset, len); + spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END); return 0; } diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index 1525636..6aa7086 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -203,6 +203,7 @@ struct spi_flash *spi_flash_validate_params(struct spi_slave *spi, u8 *idcode) flash->page_size = (ext_jedec == 0x4d00) ? 512 : 256; flash->sector_size = params->sector_size; flash->size = flash->sector_size * params->nr_sectors; + flash->memory_map = spi->memory_map; /* Compute erase sector and command */ if (params->flags & SECT_4K) { -- cgit v1.1