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SAMV7: Quick'n'dirty port of the SAMA5 HSMCI driver to the SAMV7

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This commit is contained in:
Gregory Nutt 2015-03-12 18:03:41 -06:00
parent 7fd9380485
commit eb6ff69470
1 changed files with 15 additions and 3 deletions
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18
configs/samv71-xult/include/board.h
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@ -141,14 +141,26 @@
/* HSMCI clocking
*
* Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
* divided by (2*(CLKDIV+1)).
* divided by (2*(CLKDIV) + CLOCKODD + 2).
*
* MCI_SPEED = MCK / (2*(CLKDIV+1))
* CLKDIV = MCK / MCI_SPEED / 2 - 1
* MCI_SPEED = MCK / (2*CLKDIV + CLOCKODD + 2)
*
* Where CLKDIV has a range of 0-255.
*/
/* MCK = 150MHz, CLKDIV = 186, MCI_SPEED = 150MHz / (2*186 + 1 + 2) = 400 KHz */
#define HSMCI_INIT_CLKDIV ((186 << HSMCI_MR_CLKDIV_SHIFT) | HSMCI_MR_CLKODD)
/* MCK = 150MHz, CLKDIV = 3 w/CLOCKODD, MCI_SPEED = 150MHz /(2*3 + 0 + 2) = 18.75 MHz */
#define HSMCI_MMCXFR_CLKDIV (2 << HSMCI_MR_CLKDIV_SHIFT)
/* MCK = 150MHz, CLKDIV = 2, MCI_SPEED = 150MHz /(2*2 + 0 + 2) = 25 MHz */
#define HSMCI_SDXFR_CLKDIV (2 << HSMCI_MR_CLKDIV_SHIFT)
#define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV
/* FLASH wait states.
*
* Wait states Max frequency at 105 centigrade (STH conditions)