arm: socfpga: reset: Start reworking the SoCFPGA reset manager

Implement macro SOCFPGA_RESET(name), which produces an abstract
reset number. Implement macros which allow extracting the reset
offset in permodrstN register and which permodrstN register the
reset is located in from this abstract reset number. Use these
macros throughout the reset manager.
Signed-off-by: NMarek Vasut <marex@denx.de>

arch/arm/mach-socfpga/include/mach/reset_manager.h

@@ -38,13 +38,44 @@ struct socfpga_reset_manager {
 #define RSTMGR_CTRL_SWWARMRSTREQ_LSB 1
 #endif
 
-#define RSTMGR_PERMODRST_EMAC0_LSB	0
-#define RSTMGR_PERMODRST_EMAC1_LSB	1
-#define RSTMGR_PERMODRST_L4WD0_LSB	6
-#define RSTMGR_PERMODRST_OSC1TIMER0_LSB	8
-#define RSTMGR_PERMODRST_UART0_LSB	16
-#define RSTMGR_PERMODRST_SPIM0_LSB	18
-#define RSTMGR_PERMODRST_SPIM1_LSB	19
-#define RSTMGR_PERMODRST_SDR_LSB	29
+/*
+ * Define a reset identifier, from which a permodrst bank ID
+ * and reset ID can be extracted using the subsequent macros
+ * RSTMGR_RESET() and RSTMGR_BANK().
+ */
+#define RSTMGR_BANK_OFFSET	8
+#define RSTMGR_BANK_MASK	0x7
+#define RSTMGR_RESET_OFFSET	0
+#define RSTMGR_RESET_MASK	0x1f
+#define RSTMGR_DEFINE(_bank, _offset)		\
+	((_bank) << RSTMGR_BANK_OFFSET) | ((_offset) << RSTMGR_RESET_OFFSET)
+
+/* Extract reset ID from the reset identifier. */
+#define RSTMGR_RESET(_reset)			\
+	(((_reset) >> RSTMGR_RESET_OFFSET) & RSTMGR_RESET_MASK)
+
+/* Extract bank ID from the reset identifier. */
+#define RSTMGR_BANK(_reset)			\
+	(((_reset) >> RSTMGR_BANK_OFFSET) & RSTMGR_BANK_MASK)
+
+/*
+ * SocFPGA Cyclone V/Arria V reset IDs, bank mapping is as follows:
+ * 0 ... mpumodrst
+ * 1 ... permodrst
+ * 2 ... per2modrst
+ * 3 ... brgmodrst
+ * 4 ... miscmodrst
+ */
+#define RSTMGR_EMAC0		RSTMGR_DEFINE(1, 0)
+#define RSTMGR_EMAC1		RSTMGR_DEFINE(1, 1)
+#define RSTMGR_L4WD0		RSTMGR_DEFINE(1, 6)
+#define RSTMGR_OSC1TIMER0	RSTMGR_DEFINE(1, 8)
+#define RSTMGR_UART0		RSTMGR_DEFINE(1, 16)
+#define RSTMGR_SPIM0		RSTMGR_DEFINE(1, 18)
+#define RSTMGR_SPIM1		RSTMGR_DEFINE(1, 19)
+#define RSTMGR_SDR		RSTMGR_DEFINE(1, 29)
+
+/* Create a human-readable reference to SoCFPGA reset. */
+#define SOCFPGA_RESET(_name)	RSTMGR_##_name
 
 #endif /* _RESET_MANAGER_H_ */

arch/arm/mach-socfpga/reset_manager.c

@@ -20,11 +20,11 @@ void socfpga_watchdog_reset(void)
 {
 	/* assert reset for watchdog */
 	setbits_le32(&reset_manager_base->per_mod_reset,
-		     1 << RSTMGR_PERMODRST_L4WD0_LSB);
+		     1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0)));
 
 	/* deassert watchdog from reset (watchdog in not running state) */
 	clrbits_le32(&reset_manager_base->per_mod_reset,
-		     1 << RSTMGR_PERMODRST_L4WD0_LSB);
+		     1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0)));
 }
 
 /*
@@ -94,13 +94,13 @@ void socfpga_emac_reset(int enable)
 	const void *reset = &reset_manager_base->per_mod_reset;
 
 	if (enable) {
-		setbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC0_LSB);
-		setbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC1_LSB);
+		setbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(EMAC0)));
+		setbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(EMAC1)));
 	} else {
 #if (CONFIG_EMAC_BASE == SOCFPGA_EMAC0_ADDRESS)
-		clrbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC0_LSB);
+		clrbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(EMAC0)));
 #elif (CONFIG_EMAC_BASE == SOCFPGA_EMAC1_ADDRESS)
-		clrbits_le32(reset, 1 << RSTMGR_PERMODRST_EMAC1_LSB);
+		clrbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(EMAC1)));
 #endif
 	}
 }
@@ -110,8 +110,8 @@ void socfpga_spim_enable(void)
 {
 	const void *reset = &reset_manager_base->per_mod_reset;
 
-	clrbits_le32(reset, (1 << RSTMGR_PERMODRST_SPIM0_LSB) |
-		     (1 << RSTMGR_PERMODRST_SPIM1_LSB));
+	clrbits_le32(reset, (1 << RSTMGR_RESET(SOCFPGA_RESET(SPIM0))) |
+		     (1 << RSTMGR_RESET(SOCFPGA_RESET(SPIM1))));
 }
 
 /* Bring UART0 out of reset. */
@@ -119,7 +119,7 @@ void socfpga_uart0_enable(void)
 {
 	const void *reset = &reset_manager_base->per_mod_reset;
 
-	clrbits_le32(reset, 1 << RSTMGR_PERMODRST_UART0_LSB);
+	clrbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(UART0)));
 }
 
 /* Bring SDRAM controller out of reset. */
@@ -127,7 +127,7 @@ void socfpga_sdram_enable(void)
 {
 	const void *reset = &reset_manager_base->per_mod_reset;
 
-	clrbits_le32(reset, 1 << RSTMGR_PERMODRST_SDR_LSB);
+	clrbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(SDR)));
 }
 
 /* Bring OSC1 timer out of reset. */
@@ -135,5 +135,5 @@ void socfpga_osc1timer_enable(void)
 {
 	const void *reset = &reset_manager_base->per_mod_reset;
 
-	clrbits_le32(reset, 1 << RSTMGR_PERMODRST_OSC1TIMER0_LSB);
+	clrbits_le32(reset, 1 << RSTMGR_RESET(SOCFPGA_RESET(OSC1TIMER0)));
 }