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Add support for CS2 dataflash for Atmel-SPI. 

The only missing chipselect line support is CS2, and I need it on
CS2...

Signed-off-by: Remy Bohmer <linux@bohmer.net>
This commit is contained in:
Remy Bohmer 2009-10-28 22:13:37 +01:00 committed by Wolfgang Denk
parent faf36c1437
commit 41dfd8a603
1 changed files with 16 additions and 2 deletions
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18
drivers/spi/atmel_dataflash_spi.c
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@ -30,7 +30,8 @@
#include <dataflash.h>
#define AT91_SPI_PCS0_DATAFLASH_CARD 0xE /* Chip Select 0: NPCS0%1110 */
#define AT91_SPI_PCS1_DATAFLASH_CARD 0xD /* Chip Select 0: NPCS0%1101 */
#define AT91_SPI_PCS1_DATAFLASH_CARD 0xD /* Chip Select 1: NPCS1%1101 */
#define AT91_SPI_PCS2_DATAFLASH_CARD 0xB /* Chip Select 2: NPCS2%1011 */
#define AT91_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3: NPCS3%0111 */
void AT91F_SpiInit(void)
@ -57,7 +58,14 @@ void AT91F_SpiInit(void)
((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
AT91_BASE_SPI + AT91_SPI_CSR(1));
#endif
#ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS2
/* Configure CS2 */
writel(AT91_SPI_NCPHA |
(AT91_SPI_DLYBS & DATAFLASH_TCSS) |
(AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
AT91_BASE_SPI + AT91_SPI_CSR(2));
#endif
#ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3
/* Configure CS3 */
writel(AT91_SPI_NCPHA |
@ -99,6 +107,12 @@ void AT91F_SpiEnable(int cs)
writel(mode | ((AT91_SPI_PCS1_DATAFLASH_CARD<<16) & AT91_SPI_PCS),
AT91_BASE_SPI + AT91_SPI_MR);
break;
case 2: /* Configure SPI CS2 for Serial DataFlash AT45DBxx */
mode = readl(AT91_BASE_SPI + AT91_SPI_MR);
mode &= 0xFFF0FFFF;
writel(mode | ((AT91_SPI_PCS2_DATAFLASH_CARD<<16) & AT91_SPI_PCS),
AT91_BASE_SPI + AT91_SPI_MR);
break;
case 3:
mode = readl(AT91_BASE_SPI + AT91_SPI_MR);
mode &= 0xFFF0FFFF;