[AVR32] Add basic HMATRIX support

This adds register and clock definitions for the High-speed bus Matrix
(HMATRIX) as well as a function that can be used to configure special
EBI functionality like CompactFlash and NAND flash support.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

2 files changed, 220 insertions, 0 deletions

diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c
index 472703f..32c7045 100644
--- a/arch/avr32/mach-at32ap/at32ap7000.c
+++ b/arch/avr32/mach-at32ap/at32ap7000.c
@@ -18,6 +18,7 @@
 #include <asm/arch/sm.h>
 
 #include "clock.h"
+#include "hmatrix.h"
 #include "pio.h"
 #include "sm.h"
 
@@ -467,6 +468,42 @@ static struct clk pico_clk = {
 };
 
 /* --------------------------------------------------------------------
+ * HMATRIX
+ * -------------------------------------------------------------------- */
+
+static struct clk hmatrix_clk = {
+	.name		= "hmatrix_clk",
+	.parent		= &pbb_clk,
+	.mode		= pbb_clk_mode,
+	.get_rate	= pbb_clk_get_rate,
+	.index		= 2,
+	.users		= 1,
+};
+#define HMATRIX_BASE	((void __iomem *)0xfff00800)
+
+#define hmatrix_readl(reg)					\
+	__raw_readl((HMATRIX_BASE) + HMATRIX_##reg)
+#define hmatrix_writel(reg,value)				\
+	__raw_writel((value), (HMATRIX_BASE) + HMATRIX_##reg)
+
+/*
+ * Set bits in the HMATRIX Special Function Register (SFR) used by the
+ * External Bus Interface (EBI). This can be used to enable special
+ * features like CompactFlash support, NAND Flash support, etc. on
+ * certain chipselects.
+ */
+static inline void set_ebi_sfr_bits(u32 mask)
+{
+	u32 sfr;
+
+	clk_enable(&hmatrix_clk);
+	sfr = hmatrix_readl(SFR4);
+	sfr |= mask;
+	hmatrix_writel(SFR4, sfr);
+	clk_disable(&hmatrix_clk);
+}
+
+/* --------------------------------------------------------------------
  *  PIO
  * -------------------------------------------------------------------- */
 
@@ -950,6 +987,7 @@ struct clk *at32_clock_list[] = {
 	&pbb_clk,
 	&at32_sm_pclk,
 	&at32_intc0_pclk,
+	&hmatrix_clk,
 	&ebi_clk,
 	&hramc_clk,
 	&smc0_pclk,
diff --git a/arch/avr32/mach-at32ap/hmatrix.h b/arch/avr32/mach-at32ap/hmatrix.h
new file mode 100644
index 0000000..d10bfb6
--- /dev/null
+++ b/arch/avr32/mach-at32ap/hmatrix.h
@@ -0,0 +1,182 @@
+/*
+ * Register definitions for High-Speed Bus Matrix
+ */
+#ifndef __HMATRIX_H
+#define __HMATRIX_H
+
+/* HMATRIX register offsets */
+#define HMATRIX_MCFG0				0x0000
+#define HMATRIX_MCFG1				0x0004
+#define HMATRIX_MCFG2				0x0008
+#define HMATRIX_MCFG3				0x000c
+#define HMATRIX_MCFG4				0x0010
+#define HMATRIX_MCFG5				0x0014
+#define HMATRIX_MCFG6				0x0018
+#define HMATRIX_MCFG7				0x001c
+#define HMATRIX_MCFG8				0x0020
+#define HMATRIX_MCFG9				0x0024
+#define HMATRIX_MCFG10				0x0028
+#define HMATRIX_MCFG11				0x002c
+#define HMATRIX_MCFG12				0x0030
+#define HMATRIX_MCFG13				0x0034
+#define HMATRIX_MCFG14				0x0038
+#define HMATRIX_MCFG15				0x003c
+#define HMATRIX_SCFG0				0x0040
+#define HMATRIX_SCFG1				0x0044
+#define HMATRIX_SCFG2				0x0048
+#define HMATRIX_SCFG3				0x004c
+#define HMATRIX_SCFG4				0x0050
+#define HMATRIX_SCFG5				0x0054
+#define HMATRIX_SCFG6				0x0058
+#define HMATRIX_SCFG7				0x005c
+#define HMATRIX_SCFG8				0x0060
+#define HMATRIX_SCFG9				0x0064
+#define HMATRIX_SCFG10				0x0068
+#define HMATRIX_SCFG11				0x006c
+#define HMATRIX_SCFG12				0x0070
+#define HMATRIX_SCFG13				0x0074
+#define HMATRIX_SCFG14				0x0078
+#define HMATRIX_SCFG15				0x007c
+#define HMATRIX_PRAS0				0x0080
+#define HMATRIX_PRBS0				0x0084
+#define HMATRIX_PRAS1				0x0088
+#define HMATRIX_PRBS1				0x008c
+#define HMATRIX_PRAS2				0x0090
+#define HMATRIX_PRBS2				0x0094
+#define HMATRIX_PRAS3				0x0098
+#define HMATRIX_PRBS3				0x009c
+#define HMATRIX_PRAS4				0x00a0
+#define HMATRIX_PRBS4				0x00a4
+#define HMATRIX_PRAS5				0x00a8
+#define HMATRIX_PRBS5				0x00ac
+#define HMATRIX_PRAS6				0x00b0
+#define HMATRIX_PRBS6				0x00b4
+#define HMATRIX_PRAS7				0x00b8
+#define HMATRIX_PRBS7				0x00bc
+#define HMATRIX_PRAS8				0x00c0
+#define HMATRIX_PRBS8				0x00c4
+#define HMATRIX_PRAS9				0x00c8
+#define HMATRIX_PRBS9				0x00cc
+#define HMATRIX_PRAS10				0x00d0
+#define HMATRIX_PRBS10				0x00d4
+#define HMATRIX_PRAS11				0x00d8
+#define HMATRIX_PRBS11				0x00dc
+#define HMATRIX_PRAS12				0x00e0
+#define HMATRIX_PRBS12				0x00e4
+#define HMATRIX_PRAS13				0x00e8
+#define HMATRIX_PRBS13				0x00ec
+#define HMATRIX_PRAS14				0x00f0
+#define HMATRIX_PRBS14				0x00f4
+#define HMATRIX_PRAS15				0x00f8
+#define HMATRIX_PRBS15				0x00fc
+#define HMATRIX_MRCR				0x0100
+#define HMATRIX_SFR0				0x0110
+#define HMATRIX_SFR1				0x0114
+#define HMATRIX_SFR2				0x0118
+#define HMATRIX_SFR3				0x011c
+#define HMATRIX_SFR4				0x0120
+#define HMATRIX_SFR5				0x0124
+#define HMATRIX_SFR6				0x0128
+#define HMATRIX_SFR7				0x012c
+#define HMATRIX_SFR8				0x0130
+#define HMATRIX_SFR9				0x0134
+#define HMATRIX_SFR10				0x0138
+#define HMATRIX_SFR11				0x013c
+#define HMATRIX_SFR12				0x0140
+#define HMATRIX_SFR13				0x0144
+#define HMATRIX_SFR14				0x0148
+#define HMATRIX_SFR15				0x014c
+
+/* Bitfields in MCFGx */
+#define HMATRIX_ULBT_OFFSET			0
+#define HMATRIX_ULBT_SIZE			3
+
+/* Bitfields in SCFGx */
+#define HMATRIX_SLOT_CYCLE_OFFSET		0
+#define HMATRIX_SLOT_CYCLE_SIZE			8
+#define HMATRIX_DEFMSTR_TYPE_OFFSET		16
+#define HMATRIX_DEFMSTR_TYPE_SIZE		2
+#define HMATRIX_FIXED_DEFMSTR_OFFSET		18
+#define HMATRIX_FIXED_DEFMSTR_SIZE		4
+#define HMATRIX_ARBT_OFFSET			24
+#define HMATRIX_ARBT_SIZE			2
+
+/* Bitfields in PRASx */
+#define HMATRIX_M0PR_OFFSET			0
+#define HMATRIX_M0PR_SIZE			4
+#define HMATRIX_M1PR_OFFSET			4
+#define HMATRIX_M1PR_SIZE			4
+#define HMATRIX_M2PR_OFFSET			8
+#define HMATRIX_M2PR_SIZE			4
+#define HMATRIX_M3PR_OFFSET			12
+#define HMATRIX_M3PR_SIZE			4
+#define HMATRIX_M4PR_OFFSET			16
+#define HMATRIX_M4PR_SIZE			4
+#define HMATRIX_M5PR_OFFSET			20
+#define HMATRIX_M5PR_SIZE			4
+#define HMATRIX_M6PR_OFFSET			24
+#define HMATRIX_M6PR_SIZE			4
+#define HMATRIX_M7PR_OFFSET			28
+#define HMATRIX_M7PR_SIZE			4
+
+/* Bitfields in PRBSx */
+#define HMATRIX_M8PR_OFFSET			0
+#define HMATRIX_M8PR_SIZE			4
+#define HMATRIX_M9PR_OFFSET			4
+#define HMATRIX_M9PR_SIZE			4
+#define HMATRIX_M10PR_OFFSET			8
+#define HMATRIX_M10PR_SIZE			4
+#define HMATRIX_M11PR_OFFSET			12
+#define HMATRIX_M11PR_SIZE			4
+#define HMATRIX_M12PR_OFFSET			16
+#define HMATRIX_M12PR_SIZE			4
+#define HMATRIX_M13PR_OFFSET			20
+#define HMATRIX_M13PR_SIZE			4
+#define HMATRIX_M14PR_OFFSET			24
+#define HMATRIX_M14PR_SIZE			4
+#define HMATRIX_M15PR_OFFSET			28
+#define HMATRIX_M15PR_SIZE			4
+
+/* Bitfields in SFR4 */
+#define HMATRIX_CS1A_OFFSET			1
+#define HMATRIX_CS1A_SIZE			1
+#define HMATRIX_CS3A_OFFSET			3
+#define HMATRIX_CS3A_SIZE			1
+#define HMATRIX_CS4A_OFFSET			4
+#define HMATRIX_CS4A_SIZE			1
+#define HMATRIX_CS5A_OFFSET			5
+#define HMATRIX_CS5A_SIZE			1
+#define HMATRIX_DBPUC_OFFSET			8
+#define HMATRIX_DBPUC_SIZE			1
+
+/* Constants for ULBT */
+#define HMATRIX_ULBT_INFINITE			0
+#define HMATRIX_ULBT_SINGLE			1
+#define HMATRIX_ULBT_FOUR_BEAT			2
+#define HMATRIX_ULBT_EIGHT_BEAT			3
+#define HMATRIX_ULBT_SIXTEEN_BEAT		4
+
+/* Constants for DEFMSTR_TYPE */
+#define HMATRIX_DEFMSTR_TYPE_NO_DEFAULT		0
+#define HMATRIX_DEFMSTR_TYPE_LAST_DEFAULT	1
+#define HMATRIX_DEFMSTR_TYPE_FIXED_DEFAULT	2
+
+/* Constants for ARBT */
+#define HMATRIX_ARBT_ROUND_ROBIN		0
+#define HMATRIX_ARBT_FIXED_PRIORITY		1
+
+/* Bit manipulation macros */
+#define HMATRIX_BIT(name)					\
+	(1 << HMATRIX_##name##_OFFSET)
+#define HMATRIX_BF(name,value)					\
+	(((value) & ((1 << HMATRIX_##name##_SIZE) - 1))		\
+	 << HMATRIX_##name##_OFFSET)
+#define HMATRIX_BFEXT(name,value)				\
+	(((value) >> HMATRIX_##name##_OFFSET)			\
+	 & ((1 << HMATRIX_##name##_SIZE) - 1))
+#define HMATRIX_BFINS(name,value,old)				\
+	(((old) & ~(((1 << HMATRIX_##name##_SIZE) - 1)		\
+		    << HMATRIX_##name##_OFFSET))		\
+	 | HMATRIX_BF(name,value))
+
+#endif /* __HMATRIX_H */