SMSC LAN91C111 Ethernet Driver Development

voidjackjiang

Description:
     Ethernet Chip: SMSC LAN91C111
     SoC: OMAP3530
     Environment: g-bios, linux kernel

spanthrive

【Owin】设备ID还没有读出来。
昨天看了Omap3530的原理图，找到了地址、数据、读写和片选pin脚。
阅读了LAN91C的datasheet，分析了block diagram，初步了解了设备的组成拓扑结构，并进一步的分析了pin脚的functions，对结构中的PHY、MAC关系，DMA和MMU的作用有了更深刻的认识。

janezhao123

工作进展：
       根据LAN91C111和omap3530的 datasheet 配置GPMC_CONFIGx_5，enable ncs5, 选择16位模式，计算出片选区域的基址，然后选择LAN91C111的BANK3模式，读取REV数值。
结果为0，读取失败。
      原因分析：基址选择有误。
      提问：LAN91C111中944页的gpmc_we（oe）是否要配置,如何配置。

tszcgf

第一天进展：
1:导读了omap3530,LAN91C111 datasheet;
2:理清了SMSC LAN91C111内部原理结构(MAC，PHY，MII，EEPROM)，及操作方式;
3:明白了SOC是怎样片选到LAN91C111，及如何控制访问到LAN91C111;
4:设备ID尚未读出，估计读写方式错误。

jchxpll

Michael:

omap3530 register配置:
GPMC_CONFIG: 配置LIMITEDADDRESS
GPMC_CONFIG1_i: 配置MUXADDDATA，DEVICETYPE，DEVICESIZE
GPMC_CONFIG7_i: 配置MASKADDRESS(128M),CSVALID(enable)
GPMC_PREFETCH_CONFIG1: 配置ENGINECSSELECTOR(cs5)

对于LAN91C111，通过配置Bank select Register选择Bank3, 读取Revision Register即可到ID，但现在读取的值为0，不知何处出的问题，正在查找......

louismaxwit

The progress of project:

1.Read OMAP353x technical reference manual and LAN91C111 spec.

2.Analyze the block diagram of LAN91C.

3.Analyze the connection of the sock and the ethernet device, but not finished.

4.Ready to read the id of LAN91C, not finished.

louismaxwit

Development Environment:

Ethernet chip: SMSC LAN91C111

SOC: OMAP3530

Environment: g-bios




The progress of project:

1.Finish reading ID of LAN91C.

  According to the omap353x and LAN91C specs, we could found that followings:

  a. The addressable of memory which GPMC controlled have been divided into eight banks.

  b. try to chip-select bank1, so we should choose to set GPMC_CONFIG1_1 register and GPMC_CONFIG7_1 register.

  c. set the chip-select base address and region size in GPMC_CONFIG7_1 register.

  d. set the bank number which we choosed from MAC registers into the bank select register.

  e. read the chip id from the corresponding register in LAN91C.

jchxpll

读了n遍LAN91C111 Datasheet,仍没有发现如何读取PHY ID。。。。。。

louismaxwit

Development Environment:

Ethernet chip: SMSC LAN91C111

SOC: OMAP3530

Environment: g-bios




The progress of project:

  Continued reading LAN91C spec ......

StarYing-maxwit

终于可以回帖了。现在已经实现了数据包的接收，PHY ID暂时先不读了