ARM: 6185/1: AT91: PM: dual ram controller support

This rework allows to address tow memory controllers. AT91SAM9263 and
AT91SAM9G45 family have tow SDRAM or DDR/SDRAM controllers. Power management
should take care of this.
This patch modify the way RAM IP header files are implemented to allow
access to registers of both controllers ; it also adds some macros.

We also modify the power management files to use those modified header files.
Slow clock (assembly) and regular power management functions are synchronized
for setting of RAM self-refresh procedure:
(lpr & ~AT91_DDRSDRC_LPCB) | AT91_DDRSDRC_LPCB_SELF_REFRESH

Note that AT91RM9200 is not impacted by this modification.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 14 insertions, 8 deletions

diff --git a/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h b/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h
index 1499b1c..976f4a6 100644
--- a/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h
+++ b/arch/arm/mach-at91/include/mach/at91cap9_ddrsdr.h
@@ -15,7 +15,7 @@
 #ifndef AT91CAP9_DDRSDR_H
 #define AT91CAP9_DDRSDR_H
 
-#define AT91_DDRSDRC_MR		(AT91_DDRSDRC + 0x00)	/* Mode Register */
+#define AT91_DDRSDRC_MR		0x00	/* Mode Register */
 #define		AT91_DDRSDRC_MODE	(0xf << 0)		/* Command Mode */
 #define			AT91_DDRSDRC_MODE_NORMAL		0
 #define			AT91_DDRSDRC_MODE_NOP		1
@@ -25,10 +25,10 @@
 #define			AT91_DDRSDRC_MODE_EXT_LMR	5
 #define			AT91_DDRSDRC_MODE_DEEP		6
 
-#define AT91_DDRSDRC_RTR	(AT91_DDRSDRC + 0x04)	/* Refresh Timer Register */
+#define AT91_DDRSDRC_RTR	0x04	/* Refresh Timer Register */
 #define		AT91_DDRSDRC_COUNT	(0xfff << 0)		/* Refresh Timer Counter */
 
-#define AT91_DDRSDRC_CR		(AT91_DDRSDRC + 0x08)	/* Configuration Register */
+#define AT91_DDRSDRC_CR		0x08	/* Configuration Register */
 #define		AT91_DDRSDRC_NC		(3 << 0)		/* Number of Column Bits */
 #define			AT91_DDRSDRC_NC_SDR8	(0 << 0)
 #define			AT91_DDRSDRC_NC_SDR9	(1 << 0)
@@ -49,7 +49,7 @@
 #define		AT91_DDRSDRC_DLL	(1 << 7)		/* Reset DLL */
 #define		AT91_DDRSDRC_DICDS	(1 << 8)		/* Output impedance control */
 
-#define AT91_DDRSDRC_T0PR	(AT91_DDRSDRC + 0x0C)	/* Timing 0 Register */
+#define AT91_DDRSDRC_T0PR	0x0C	/* Timing 0 Register */
 #define		AT91_DDRSDRC_TRAS	(0xf <<  0)		/* Active to Precharge delay */
 #define		AT91_DDRSDRC_TRCD	(0xf <<  4)		/* Row to Column delay */
 #define		AT91_DDRSDRC_TWR	(0xf <<  8)		/* Write recovery delay */
@@ -59,13 +59,13 @@
 #define		AT91_DDRSDRC_TWTR	(1   << 24)		/* Internal Write to Read delay */
 #define		AT91_DDRSDRC_TMRD	(0xf << 28)		/* Load mode to active/refresh delay */
 
-#define AT91_DDRSDRC_T1PR	(AT91_DDRSDRC + 0x10)	/* Timing 1 Register */
+#define AT91_DDRSDRC_T1PR	0x10	/* Timing 1 Register */
 #define		AT91_DDRSDRC_TRFC	(0x1f << 0)		/* Row Cycle Delay */
 #define		AT91_DDRSDRC_TXSNR	(0xff << 8)		/* Exit self-refresh to non-read */
 #define		AT91_DDRSDRC_TXSRD	(0xff << 16)		/* Exit self-refresh to read */
 #define		AT91_DDRSDRC_TXP	(0xf  << 24)		/* Exit power-down delay */
 
-#define AT91_DDRSDRC_LPR	(AT91_DDRSDRC + 0x18)	/* Low Power Register */
+#define AT91_DDRSDRC_LPR	0x18	/* Low Power Register */
 #define		AT91_DDRSDRC_LPCB		(3 << 0)	/* Low-power Configurations */
 #define			AT91_DDRSDRC_LPCB_DISABLE		0
 #define			AT91_DDRSDRC_LPCB_SELF_REFRESH		1
@@ -80,14 +80,14 @@
 #define			AT91_DDRSDRC_TIMEOUT_64_CLK_CYCLES	(1 << 12)
 #define			AT91_DDRSDRC_TIMEOUT_128_CLK_CYCLES	(2 << 12)
 
-#define AT91_DDRSDRC_MDR	(AT91_DDRSDRC + 0x1C)	/* Memory Device Register */
+#define AT91_DDRSDRC_MDR	0x1C	/* Memory Device Register */
 #define		AT91_DDRSDRC_MD		(3 << 0)		/* Memory Device Type */
 #define			AT91_DDRSDRC_MD_SDR		0
 #define			AT91_DDRSDRC_MD_LOW_POWER_SDR	1
 #define			AT91_DDRSDRC_MD_DDR		2
 #define			AT91_DDRSDRC_MD_LOW_POWER_DDR	3
 
-#define AT91_DDRSDRC_DLLR	(AT91_DDRSDRC + 0x20)	/* DLL Information Register */
+#define AT91_DDRSDRC_DLLR	0x20	/* DLL Information Register */
 #define		AT91_DDRSDRC_MDINC	(1 << 0)		/* Master Delay increment */
 #define		AT91_DDRSDRC_MDDEC	(1 << 1)		/* Master Delay decrement */
 #define		AT91_DDRSDRC_MDOVF	(1 << 2)		/* Master Delay Overflow */
@@ -98,5 +98,11 @@
 #define		AT91_DDRSDRC_SDVAL	(0xff << 16)		/* Slave Delay value */
 #define		AT91_DDRSDRC_SDCVAL	(0xff << 24)		/* Slave Delay Correction value */
 
+/* Register access macros */
+#define at91_ramc_read(num, reg) \
+	at91_sys_read(AT91_DDRSDRC##num + reg)
+#define at91_ramc_write(num, reg, value) \
+	at91_sys_write(AT91_DDRSDRC##num + reg, value)
+
 
 #endif