[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 472703f90c22..32c7045141c2 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 000000000000..d10bfb60d68d
--- /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 */