Hi Fred, > I?m writing a Driver for SPI. That is not working now. > I have a MPC8260 using Linux 2.6.14 (rheap patch). > > Did someone else write a driver for SPI on this ?C or an other driver? So I > can see what i did wrong?
I'm working on an SPI driver for the MPC8248. I'll try to send a patch in a few days. > My SPCOM[STR] flag isn?t cleared automatically after one clock cycle. > What here going wrong ? ( I know this register is write only) > There is also no Clock on my SPICLK. Make sure you programmed the SPMODE register correctly. > How I have to allocate the Memory for the BD?s and the buffer for the BD?s? The buffer descriptors should be allocated from CPM DPRAM using cpm_dpalloc(). The buffers can be allocated from any DMA-able memory (all system memory). > Is there something special when I allocate Memory for my Parameter Ram? You don't need to allocate memory for the parameter RAM. I declared PROFF_SPI equal to 192 (I2C parameter RAM is at 128) in include/asm-ppc/cpm2.h: #define PROFF_SMC1 (0) #define PROFF_SMC2 (64) #define PROFF_I2C (128) #define PROFF_SPI (192) Don't forget to set CPM_DATAONLY_BASE to 256 instead of 128 in the same file. Then, set *(u16 *)(&immap->im_dprambase[PROFF_SPI_BASE]) = PROFF_SPI; in your driver code, and set the SPI pram resource to .name = "pram", .start = 0x00c0, .end = 0x00ff, .flags = IORESOURCE_MEM, in arch/ppc/syslib/pq2_devices.c > Is something wrong with the 2.6 Kernel so i have to use the 2.4 Kernel ? You should not use 2.4. 2.6 is the way to go. Laurent Pinchart
