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sd-as3525v2: Add some comments, no functional changes

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25546 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2010-04-09 00:26:06 +00:00
parent cb6e120b66
commit 43304b87b0
1 changed files with 9 additions and 9 deletions
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18
firmware/target/arm/as3525/sd-as3525v2.c
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@ -628,41 +628,41 @@ static void init_controller(void)
int hcon_numcards = ((MCI_HCON>>1) & 0x1F) + 1;
int card_mask = (1 << hcon_numcards) - 1;
MCI_PWREN &= ~card_mask; /* power off all cards */
MCI_PWREN &= ~card_mask; /* power off all cards */
MCI_CLKSRC = 0x00; /* All CLK_SRC_CRD set to 0*/
MCI_CLKDIV = 0x00; /* CLK_DIV_0 : bits 7:0 */
MCI_CLKSRC = 0x00; /* All CLK_SRC_CRD set to 0*/
MCI_CLKDIV = 0x00; /* CLK_DIV_0 : bits 7:0 */
MCI_PWREN |= card_mask; /* power up cards */
MCI_PWREN |= card_mask; /* power up cards */
mci_delay();
MCI_CTRL |= CTRL_RESET;
while(MCI_CTRL & CTRL_RESET)
;
MCI_RAW_STATUS = 0xffffffff;
MCI_RAW_STATUS = 0xffffffff; /* Clear all MCI Interrupts */
MCI_TMOUT = 0xffffffff; /* data b31:8, response b7:0 */
MCI_CTYPE = 0x0; /* all cards 1 bit bus for now */
MCI_CLKENA = card_mask;
MCI_CLKENA = card_mask; /* Enables card clocks */
MCI_ARGUMENT = 0;
MCI_COMMAND = CMD_DONE_BIT|CMD_SEND_CLK_ONLY|CMD_WAIT_PRV_DAT_BIT;
while(MCI_COMMAND & CMD_DONE_BIT)
;
MCI_DEBNCE = 0xfffff; /* default value */
MCI_DEBNCE = 0xfffff; /* default value */
/* Rx watermark = 63(sd reads) Tx watermark = 128 (sd writes) */
MCI_FIFOTH = (MCI_FIFOTH & MCI_FIFOTH_MASK) | 0x503f0080;
GPIOB_DIR |= (1<<5); /* Set pin B5 to output */
/* Mask all MCI Interrupts initially */
MCI_MASK = 0;
GPIOB_DIR |= (1<<5); /* Pin B5 output */
MCI_CTRL |= INT_ENABLE;
}