Messages in this thread | | | Subject | Re: [PATCH 2/2] MEMSTICK: Add driver for Ricoh R5C592 Card reader. | From | Maxim Levitsky <> | Date | Mon, 09 Aug 2010 22:19:08 +0300 |
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About INT bits, I still don't understand them exactly.
First of all we have 4 meaningful bits. In parallel mode these are exposed on data lines, in serial mode only MEMSTICK_INT_CED is. And I can always send MS_TPC_GET_INT or just read the registers.
#define MEMSTICK_INT_CMDNAK 0x01 #define MEMSTICK_INT_BREQ 0x20 #define MEMSTICK_INT_ERR 0x40 #define MEMSTICK_INT_CED 0x80
Now, I send a command to device, say MS_CMD_BLOCK_READ. What bits I need to poll until I can be sure that command is completed?
Also the MEMSTICK_INT_BREQ tells that input is available in firmware buffer (to read using TPC_READ_LONG_DATA)?
Is that true that MEMSTICK_INT_BREQ is a summary of fifo full/empty bits in status0?
And same about MEMSTICK_INT_ERR and status1.
I try my best to create a driver that actually works, simple, and error free, even in unusual conditions. Thats why I am asking all these questions.
Thanks for help, Best regards, Maxim Levitsky
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