diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/SPI/README.dual-flash | 92 | ||||
| -rw-r--r-- | doc/SPI/README.ftssp010_spi_test | 41 | ||||
| -rw-r--r-- | doc/SPI/status.txt | 11 |
3 files changed, 139 insertions, 5 deletions
diff --git a/doc/SPI/README.dual-flash b/doc/SPI/README.dual-flash new file mode 100644 index 0000000..6c88d65 --- /dev/null +++ b/doc/SPI/README.dual-flash @@ -0,0 +1,92 @@ +SPI/QSPI Dual flash connection modes: +===================================== + +This describes how SPI/QSPI flash memories are connected to a given +controller in a single chip select line. + +Current spi_flash framework supports, single flash memory connected +to a given controller with single chip select line, but there are some +hw logics(ex: xilinx zynq qspi) that describes two/dual memories are +connected with a single chip select line from a controller. + +"dual_flash" from include/spi.h describes these types of connection mode + +Possible connections: +-------------------- +SF_SINGLE_FLASH: + - single spi flash memory connected with single chip select line. + + +------------+ CS +---------------+ + | |----------------------->| | + | Controller | I0[3:0] | Flash memory | + | SPI/QSPI |<======================>| (SPI/QSPI) | + | | CLK | | + | |----------------------->| | + +------------+ +---------------+ + +SF_DUAL_STACKED_FLASH: + - dual spi/qspi flash memories are connected with a single chipselect + line and these two memories are operating stacked fasion with shared buses. + - xilinx zynq qspi controller has implemented this feature [1] + + +------------+ CS +---------------+ + | |---------------------->| | + | | I0[3:0] | Upper Flash | + | | +=========>| memory | + | | | CLK | (SPI/QSPI) | + | | | +---->| | + | Controller | CS | | +---------------+ + | SPI/QSPI |------------|----|---->| | + | | I0[3:0] | | | Lower Flash | + | |<===========+====|====>| memory | + | | CLK | | (SPI/QSPI) | + | |-----------------+---->| | + +------------+ +---------------+ + + - two memory flash devices should has same hw part attributes (like size, + vendor..etc) + - Configurations: + on LQSPI_CFG register, Enable TWO_MEM[BIT:30] on LQSPI_CFG + Enable U_PAGE[BIT:28] if U_PAGE flag set - upper memory + Disable U_PAGE[BIT:28] if U_PAGE flag unset - lower memory + - Operation: + accessing memories serially like one after another. + by default, if U_PAGE is unset lower memory should accessible, + once user wants to access upper memory need to set U_PAGE. + +SPI_FLASH_CONN_DUALPARALLEL: + - dual spi/qspi flash memories are connected with a single chipselect + line and these two memories are operating parallel with separate buses. + - xilinx zynq qspi controller has implemented this feature [1] + + +-------------+ CS +---------------+ + | |---------------------->| | + | | I0[3:0] | Upper Flash | + | |<=====================>| memory | + | | CLK | (SPI/QSPI) | + | |---------------------->| | + | Controller | CS +---------------+ + | SPI/QSPI |---------------------->| | + | | I0[3:0] | Lower Flash | + | |<=====================>| memory | + | | CLK | (SPI/QSPI) | + | |---------------------->| | + +-------------+ +---------------+ + + - two memory flash devices should has same hw part attributes (like size, + vendor..etc) + - Configurations: + Need to enable SEP_BUS[BIT:29],TWO_MEM[BIT:30] on LQSPI_CFG register. + - Operation: + Even bits, i.e. bit 0, 2, 4 ., of a data word is located in the lower memory + and odd bits, i.e. bit 1, 3, 5, ., of a data word is located in the upper memory. + +Note: Technically there is only one CS line from the controller, but +zynq qspi controller has an internal hw logic to enable additional CS +when controller is configured for dual memories. + +[1] http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf + +-- +Jagannadha Sutradharudu Teki <jaganna@xilinx.com> +05-01-2014. diff --git a/doc/SPI/README.ftssp010_spi_test b/doc/SPI/README.ftssp010_spi_test new file mode 100644 index 0000000..1d86f36 --- /dev/null +++ b/doc/SPI/README.ftssp010_spi_test @@ -0,0 +1,41 @@ +SPI Flash test on Faraday A369 EVB: +================================== + +U-Boot 2014.01-rc2-g3444b6f (Dec 20 2013 - 10:58:40) + +CPU: FA626TE 528 MHz +AHB: 132 MHz +APB: 66 MHz +I2C: ready +DRAM: 256 MiB +MMU: on +NAND: 512 MiB +MMC: ftsdc010: 0 +*** Warning - bad CRC, using default environment + +In: serial +Out: serial +Err: serial +Net: FTGMAC100#0 +Hit any key to stop autoboot: 0 +=> sf probe 0:0 +SF: Detected MX25L1605D with page size 256 Bytes, erase size 64 KiB, total 2 MiB +=> sf read 0x10800000 0 0x400 +SF: 1024 bytes @ 0x0 Read: OK +=> md 0x10800000 +10800000: ea000013 e59ff014 e59ff014 e59ff014 ................ +10800010: e59ff014 e59ff014 e59ff014 e59ff014 ................ +10800020: 1ff7b0c0 1ff7b120 1ff7b180 1ff7b1e0 .... ........... +10800030: 1ff7b240 1ff7b2a0 1ff7b300 deadbeef @............... +10800040: 10800000 0002c1f0 0007409c 00032048 .........@..H .. +10800050: 1fd6af40 e10f0000 e3c0001f e38000d3 @............... +10800060: e129f000 eb000001 eb000223 e12fff1e ..).....#...../. +10800070: e3a00000 ee070f1e ee080f17 ee070f15 ................ +10800080: ee070f9a ee110f10 e3c00c03 e3c00087 ................ +10800090: e3c00a02 e3800002 e3800a01 ee010f10 ................ +108000a0: e1a0c00e eb007a68 e1a0e00c e1a0f00e ....hz.......... +108000b0: e1a00000 e1a00000 e1a00000 e1a00000 ................ +108000c0: e51fd078 e58de000 e14fe000 e58de004 x.........O..... +108000d0: e3a0d013 e169f00d e1a0e00f e1b0f00e ......i......... +108000e0: e24dd048 e88d1fff e51f20a0 e892000c H.M...... ...... +108000f0: e28d0048 e28d5034 e1a0100e e885000f H...4P.......... diff --git a/doc/SPI/status.txt b/doc/SPI/status.txt index 62c3c85..13889f5 100644 --- a/doc/SPI/status.txt +++ b/doc/SPI/status.txt @@ -11,6 +11,11 @@ SPI FLASH (drivers/mtd/spi): - Bank Address Register (Accessing flashes > 16Mbytes in 3-byte addressing) - Added memory_mapped support for read operations. - Common probe support for all supported flash vendors except, ramtron. +- Extended read commands support(dual read, dual IO read) +- Quad Page Program support. +- Quad Read support(quad fast read, quad IO read) +- Dual flash connection topology support(accessing two spi flash memories with single cs) +- Banking support on dual flash connection topology. SPI DRIVERS (drivers/spi): - @@ -18,14 +23,10 @@ SPI DRIVERS (drivers/spi): TODO: - Runtime detection of spi_flash params, SFDP(if possible) - Add support for multibus build/accessing. -- Extended read commands support(dual read, dual IO read) -- Quad Page Program support. -- Quad Read support(quad fast read, quad IO read) -- Dual flash connection topology support(accessing two spi flash memories with single cs) -- Banking support on dual flash connection topology. - Need proper cleanups on spi_flash and drivers. -- Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> 18-09-2013. 07-10-2013. +08-01-2014. |