ARM: socfpga: Reorder Arria10 SPL

The Arria10 SPL is a complete mess of calls to functions which are
called in the wrong context and it is surprise it works at all. This
patch tries to clean that mess up by shuffling the function calls
around and moving the calls into the correct context. Due to the
delicate nature of the reordering, this is done in one huge patch.

The following changes happen in this patch:
- Security policy init and NIC301 happens first in board_init_f()
- The clock init happens very early in board_init_f() in SPL only
- arch_early_init_r() only registers the FPGA, just like on Gen5
- arch_early_init_r() is never called from any _f() function
- Dedicated FPGA pins are inited in board_init_f() as on Gen5

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <chin.liang.see@intel.com>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>

arch/arm/mach-socfpga/board.c

@@ -43,14 +43,6 @@ int board_init(void)
 	/* Address of boot parameters for ATAG (if ATAG is used) */
 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 
-#if defined(CONFIG_TARGET_SOCFPGA_ARRIA10)
-	/* configuring the clock based on handoff */
-	cm_basic_init(gd->fdt_blob);
-
-	/* Add device descriptor to FPGA device table */
-	socfpga_fpga_add();
-#endif
-
 	return 0;
 }
 

arch/arm/mach-socfpga/clock_manager_arria10.c

@@ -11,8 +11,7 @@
 #include <dm/device-internal.h>
 #include <asm/arch/clock_manager.h>
 
-static const struct socfpga_clock_manager *clock_manager_base =
-	(struct socfpga_clock_manager *)SOCFPGA_CLKMGR_ADDRESS;
+#ifdef CONFIG_SPL_BUILD
 
 static u32 eosc1_hz;
 static u32 cb_intosc_hz;
@@ -232,6 +231,9 @@ static int of_get_clk_cfg(const void *blob, struct mainpll_cfg *main_cfg,
 	return 0;
 }
 
+static const struct socfpga_clock_manager *clock_manager_base =
+	(struct socfpga_clock_manager *)SOCFPGA_CLKMGR_ADDRESS;
+
 /* calculate the intended main VCO frequency based on handoff */
 static unsigned int cm_calc_handoff_main_vco_clk_hz
 					(struct mainpll_cfg *main_cfg)
@@ -897,7 +899,7 @@ static int cm_full_cfg(struct mainpll_cfg *main_cfg, struct perpll_cfg *per_cfg)
 	return 0;
 }
 
-void cm_use_intosc(void)
+static void cm_use_intosc(void)
 {
 	setbits_le32(&clock_manager_base->ctrl,
 		     CLKMGR_CLKMGR_CTL_BOOTCLK_INTOSC_SET_MSK);
@@ -917,8 +919,11 @@ int cm_basic_init(const void *blob)
 	if (rval)
 		return rval;
 
+	cm_use_intosc();
+
 	return cm_full_cfg(&main_cfg, &per_cfg);
 }
+#endif
 
 static u32 cm_get_rate_dm(char *name)
 {

arch/arm/mach-socfpga/include/mach/clock_manager_arria10.h

@@ -89,8 +89,9 @@ struct socfpga_clock_manager {
 	struct socfpga_clock_manager_altera altera;
 };
 
-void cm_use_intosc(void);
+#ifdef CONFIG_SPL_BUILD
 int cm_basic_init(const void *blob);
+#endif
 
 unsigned int cm_get_l4_sp_clk_hz(void);
 unsigned long cm_get_mpu_clk_hz(void);

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

@@ -25,6 +25,11 @@ static inline void socfpga_fpga_add(void) {}
 void socfpga_sdram_remap_zero(void);
 #endif
 
+#ifdef CONFIG_TARGET_SOCFPGA_ARRIA10
+void socfpga_init_security_policies(void);
+void socfpga_sdram_remap_zero(void);
+#endif
+
 void do_bridge_reset(int enable);
 
 #endif /* _MISC_H_ */

arch/arm/mach-socfpga/misc_arria10.c

@@ -28,17 +28,14 @@
 #define PINMUX_UART1_TX_SHARED_IO_OFFSET_Q3_7	0x78
 #define PINMUX_UART1_TX_SHARED_IO_OFFSET_Q4_3	0x98
 
+static struct socfpga_system_manager *sysmgr_regs =
+	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
 #if defined(CONFIG_SPL_BUILD)
 static struct pl310_regs *const pl310 =
 	(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
 static const struct socfpga_noc_fw_ocram *noc_fw_ocram_base =
 	(void *)SOCFPGA_SDR_FIREWALL_OCRAM_ADDRESS;
-#endif
-
-static struct socfpga_system_manager *sysmgr_regs =
-	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
 
-#if defined(CONFIG_SPL_BUILD)
 /*
 + * This function initializes security policies to be consistent across
 + * all logic units in the Arria 10.
@@ -46,7 +43,7 @@ static struct socfpga_system_manager *sysmgr_regs =
 + * The idea is to set all security policies to be normal, nonsecure
 + * for all units.
 + */
-static void initialize_security_policies(void)
+void socfpga_init_security_policies(void)
 {
 	/* Put OCRAM in non-secure */
 	writel(0x003f0000, &noc_fw_ocram_base->region0);
@@ -66,24 +63,20 @@ static void initialize_security_policies(void)
 	writel(0x0007FFFF, &sysmgr_regs->ecc_intmask_set);
 }
 
-int arch_early_init_r(void)
+void socfpga_sdram_remap_zero(void)
 {
-	initialize_security_policies();
-
 	/* Configure the L2 controller to make SDRAM start at 0 */
 	writel(0x1, &pl310->pl310_addr_filter_start);
-
-	/* assert reset to all except L4WD0 and L4TIMER0 */
-	socfpga_per_reset_all();
-
-	return 0;
 }
-#else
+#endif
+
 int arch_early_init_r(void)
 {
+	/* Add device descriptor to FPGA device table */
+	socfpga_fpga_add();
+
 	return 0;
 }
-#endif
 
 /*
  * Print CPU information

arch/arm/mach-socfpga/spl_a10.c

@@ -68,33 +68,26 @@ u32 spl_boot_mode(const u32 boot_device)
 
 void spl_board_init(void)
 {
-	/* configuring the clock based on handoff */
-	cm_basic_init(gd->fdt_blob);
-	WATCHDOG_RESET();
-
-	config_dedicated_pins(gd->fdt_blob);
-	WATCHDOG_RESET();
-
 	/* enable console uart printing */
 	preloader_console_init();
-
 	WATCHDOG_RESET();
 
-	/* Add device descriptor to FPGA device table */
-	socfpga_fpga_add();
+	arch_early_init_r();
 }
 
 void board_init_f(ulong dummy)
 {
-	/*
-	 * Configure Clock Manager to use intosc clock instead external osc to
-	 * ensure success watchdog operation. We do it as early as possible.
-	 */
-	cm_use_intosc();
+	socfpga_init_security_policies();
+	socfpga_sdram_remap_zero();
 
+	/* Assert reset to all except L4WD0 and L4TIMER0 */
+	socfpga_per_reset_all();
 	socfpga_watchdog_disable();
 
-	arch_early_init_r();
+	spl_early_init();
+
+	/* Configure the clock based on handoff */
+	cm_basic_init(gd->fdt_blob);
 
 #ifdef CONFIG_HW_WATCHDOG
 	/* release osc1 watchdog timer 0 from reset */
@@ -104,4 +97,7 @@ void board_init_f(ulong dummy)
 	hw_watchdog_init();
 	WATCHDOG_RESET();
 #endif /* CONFIG_HW_WATCHDOG */
+
+	config_dedicated_pins(gd->fdt_blob);
+	WATCHDOG_RESET();
 }