SMC Driver

| 19-04-2021
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This documents provides the details about the Pl35x smc and pl35x nand drivers located in drivers/memory/pl35x-smc.c and drivers/mtd/nand/pl35x_nand.c

Download SMC Drivers for Free to fix common driver related problems using, step by step instructions.

Link for the source files: pl35x-smc.c
pl35x_nand.c
The SMC (PL353) supports two memory interfaces:
  • Interface 0 type SRAM/NOR.
  • Interface 1 type NAND.

For NOR, it is generic Linux CFI driver.

Controller Features

  • ONFI 1.0 compatible
  • supports up to 1GB device
  • 8/16-bit IO width with a single chip select
  • 16-word read/write FIFOs
  • 8-word command FIFO
  • Programmable IO Cycle timing
  • 1-bit ECC hardware with sw assist
  • Asynchronous memory operating mode

Driver Features

  • Supports only the mandatory ONFI 1.0 commands. i.e Reset, Read status, Read ID, Read Parameter Page, Read Page, Program Page, Erase Block, Set/Get Features
  • Supports BBT management
  • Supports ondie ecc devices
  • Support for hw ecc and sw ecc
  • support for 8 and 16 bit flash devices
  • Support for configuring the nand and nor timing parameters

  • HW ecc support for devices with 2K page size up and oobsize up to 64 bytes. Beyond that the driver will choose sw ecc mechanism.
  • Driver has auto detection mechanism for ondie ecc devices and this support is available only for micron devices with oob size 64 bytes
  • NOR driver has been tested for single chip select configuration

As part of the bbt management, driver reserves the last 4 blocks of the flash device for storing the bbt information. bbt management is similar to the standard Linux algorithm except the offset of storing the BBT signature and version; and also the locations reserved for storing the ecc information.

SMC Driver

The following kernel configuration options should be enabled for compiling the pl353 smc driver
Device Drivers -> Memory Control Drivers -> ARM PL35X Static Memory Controller(SMC) driver
CONFIG_ARM = y
CONFIG_PL35X_SMC = y

NAND Driver

The following kernel configuration options should be enabled for compiling the pl353 smc nand driver
Device Drivers -> Memory Technology Device (MTD) support -> NAND Device Support ->ARM PL35X NAND flash driver
CONFIG_MTD_NAND = y
CONFIG_ARM = y
CONFIG_PL35X_SMC = y
CONFIG_MTD_NAND_PL35X = y

NOR Driver

Select the Device Drivers option and then, select Memory Technology Devices (MTD).
Finally, choose the RAM/ROM/Flash chip drivers option.
Detect flash chips by common flash interface (CFI) by selecting one of the following:
  • For the static build, choose the option <*> Detect flash chips by Common Flash Interface (CFI).
  • For build as a module, choose the option <M> Detect flash chips by Common Flash Interface (CFI).
To build support for the AMD select one of the following:
  • For static build, choose the option <*> Support for AMD/Fujitsu flash chips.
  • For build as a module, choose the option <M> Support for AMD/Fujitsu flash chips.
To build support for Intel select one of the following:
  • For static build, choose the option <*> Support for Intel/Sharp flash chips.
  • For build as a module, choose the option <M> Support for Intel/Sharp flash chips.
To build support for Mapping drivers for chip access
  • For static build, <*> Flash device in physical memory map based on OF description
  • For build as a module, <M> Flash device in physical memory map based on OF description

For more details on nand devicetree details, please refer Documentation/devicetree/bindings/mtd/nand.txt

Smc Drivers


Link: Device Tree Binding info
The timing parameters t0, t1, t2, t3, t4, t5, t6 denotes
nand-cycle-t0 : Read cycle time(t_rc).
nand-cycle-t1 : Write cycle time(t_wc).
nand-cycle-t2 : re_n assertion delay(t_rea).
nand-cycle-t3 : we_n de-assertion delay(t_wp).
nand-cycle-t4 : Status read time(t_clr)
nand-cycle-t5 : ID read time(t_ar)
nand-cycle-t6 : busy to re_n(t_rr)
Mode
Write Speed
Read Speed
8 bit
8.1MB/sec
9.8MB/sec

JFFS2 filesystem


How to Run

UBIFS file system

Driver

Images:

Flashcp


mtd_speedtest

Smc Drivers


Select the mtd_speedtest from the kernel configuration menu:
Build it as module and use the generated .ko from the location drivers/mtd/tests/

How to run

Expected Output


  • 2016.3

    • Summary
      • None
    • Commits
      • None

  • 2016.4

    • Summary
      • None
    • Commits
      • None

  • 2017.1

    • Summary
      • Update smc nand driver as per latest kernel changes
    • Commits

  • 2017.2

    • Summary
      • None
    • Commits
      • None

  • 2017.3

    • Summary
      • None
    • Commits
      • None

  • 2017.4

    • None

Smc Driver Vacancy Surat


Smc

Not mainlined
Pl350 TRM:

Driver Smc Ez Connect

http://infocenter.arm.com/help/topic/com.arm.doc.ddi0380g/DDI0380G_smc_pl350_series_r2p1_trm.pdf