arm: omap: Unify get_device_type() function

Refactor OMAP3/4/5 code so that we have only one get_device_type()
function for all platforms.

Details:
 - Add ctrl variable for AM33xx and OMAP3 platforms (like it's done for
   OMAP4/5), so we can obtain status register in common way
 - For now ctrl structure for AM33xx/OMAP3 contains only status register
   address
 - Run hw_data_init() in order to assign ctrl to proper structure
 - Remove DEVICE_MASK and DEVICE_GP definitions as they are not used
   (DEVICE_TYPE_MASK and GP_DEVICE are used instead)
 - Guard structs in omap_common.h with #ifdefs, because otherwise
   including omap_common.h on non-omap4/5 board files breaks compilation

Buildman script was run for all OMAP boards. Result output:
    arm: (for 38/616 boards)
        all +352.5
        bss -1.4
        data +3.5
        rodata +300.0
        spl/u-boot-spl:all +284.7
        spl/u-boot-spl:data +2.2
        spl/u-boot-spl:rodata +252.0
        spl/u-boot-spl:text +30.5
        text +50.4
    (no errors to report)

Tested on AM57x EVM and BeagleBoard xM.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
[trini: Rework the guards as to not break TI81xx]
Signed-off-by: Tom Rini <trini@konsulko.com>

arch/arm/include/asm/arch-am33xx/cpu.h

@@ -36,12 +36,6 @@
 #define TCFG_RESET			BIT(0)	/* software reset */
 #define TCFG_EMUFREE			BIT(1)	/* behaviour of tmr on debug */
 #define TCFG_IDLEMOD_SHIFT		(2)	/* power management */
-/* device type */
-#define DEVICE_MASK			(BIT(8) | BIT(9) | BIT(10))
-#define TST_DEVICE			0x0
-#define EMU_DEVICE			0x1
-#define HS_DEVICE			0x2
-#define GP_DEVICE			0x3
 
 /* cpu-id for AM43XX AM33XX and TI81XX family */
 #define AM437X				0xB98C

arch/arm/include/asm/arch-am33xx/omap.h

@@ -41,6 +41,9 @@ struct omap_boot_parameters {
 	unsigned char boot_device;
 	unsigned char reset_reason;
 };
+
+#define DEVICE_TYPE_SHIFT		0x8
+#define DEVICE_TYPE_MASK		(0x7 << DEVICE_TYPE_SHIFT)
 #endif
 
 #endif

arch/arm/include/asm/arch-omap3/omap.h

@@ -91,6 +91,9 @@ struct s32ktimer {
 	unsigned int s32k_cr;		/* 0x10 */
 };
 
+#define DEVICE_TYPE_SHIFT		0x8
+#define DEVICE_TYPE_MASK		(0x7 << DEVICE_TYPE_SHIFT)
+
 #endif /* __ASSEMBLY__ */
 
 #ifndef __ASSEMBLY__

arch/arm/include/asm/arch-omap4/omap.h

@@ -100,7 +100,6 @@ struct s32ktimer {
 
 #define DEVICE_TYPE_SHIFT (0x8)
 #define DEVICE_TYPE_MASK (0x7 << DEVICE_TYPE_SHIFT)
-#define DEVICE_GP 0x3
 
 #endif /* __ASSEMBLY__ */
 

arch/arm/include/asm/arch-omap5/omap.h

@@ -127,7 +127,6 @@ struct s32ktimer {
 
 #define DEVICE_TYPE_SHIFT 0x6
 #define DEVICE_TYPE_MASK (0x7 << DEVICE_TYPE_SHIFT)
-#define DEVICE_GP 0x3
 
 /* Output impedance control */
 #define ds_120_ohm	0x0

arch/arm/include/asm/omap_common.h

@@ -484,6 +484,7 @@ struct omap_sys_ctrl_regs {
 	u32 ctrl_core_sma_sw_1;
 };
 
+#if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX)
 struct dpll_params {
 	u32 m;
 	u32 n;
@@ -516,6 +517,7 @@ struct dpll_regs {
 	u32 cm_div_h23_dpll;
 	u32 cm_div_h24_dpll;
 };
+#endif /* CONFIG_OMAP44XX || CONFIG_OMAP54XX */
 
 struct dplls {
 	const struct dpll_params *mpu;
@@ -539,6 +541,7 @@ struct pmic_data {
 	int (*pmic_write)(u8 sa, u8 reg_addr, u8 reg_data);
 };
 
+#if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX)
 enum {
 	OPP_LOW,
 	OPP_NOM,
@@ -584,6 +587,7 @@ struct vcores_data {
 	struct volts eve;
 	struct volts iva;
 };
+#endif /* CONFIG_OMAP44XX || CONFIG_OMAP54XX */
 
 extern struct prcm_regs const **prcm;
 extern struct prcm_regs const omap5_es1_prcm;
@@ -595,6 +599,8 @@ extern struct dplls dra7xx_dplls;
 extern struct vcores_data const **omap_vcores;
 extern const u32 sys_clk_array[8];
 extern struct omap_sys_ctrl_regs const **ctrl;
+extern struct omap_sys_ctrl_regs const am33xx_ctrl;
+extern struct omap_sys_ctrl_regs const omap3_ctrl;
 extern struct omap_sys_ctrl_regs const omap4_ctrl;
 extern struct omap_sys_ctrl_regs const omap5_ctrl;
 extern struct omap_sys_ctrl_regs const dra7xx_ctrl;
@@ -611,6 +617,7 @@ const struct dpll_params *get_iva_dpll_params(struct dplls const *);
 const struct dpll_params *get_usb_dpll_params(struct dplls const *);
 const struct dpll_params *get_abe_dpll_params(struct dplls const *);
 
+#if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX)
 void do_enable_clocks(u32 const *clk_domains,
 		      u32 const *clk_modules_hw_auto,
 		      u32 const *clk_modules_explicit_en,
@@ -619,6 +626,7 @@ void do_enable_clocks(u32 const *clk_domains,
 void do_disable_clocks(u32 const *clk_domains,
 		       u32 const *clk_modules_disable,
 		       u8 wait_for_disable);
+#endif /* CONFIG_OMAP44XX || CONFIG_OMAP54XX */
 
 void setup_post_dividers(u32 const base,
 			const struct dpll_params *params);
@@ -630,7 +638,9 @@ void enable_basic_uboot_clocks(void);
 void enable_usb_clocks(int index);
 void disable_usb_clocks(int index);
 
+#if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX)
 void scale_vcores(struct vcores_data const *);
+#endif /* CONFIG_OMAP44XX || CONFIG_OMAP54XX */
 int get_voltrail_opp(int rail_offset);
 u32 get_offset_code(u32 volt_offset, struct pmic_data *pmic);
 void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic);
@@ -750,7 +760,6 @@ static inline u8 is_dra72x(void)
  * silicon device type
  * Moving to common from cpu.h, since it is shared by various omap devices
  */
-#define DEVICE_MASK         (BIT(8) | BIT(9) | BIT(10))
 #define TST_DEVICE          0x0
 #define EMU_DEVICE          0x1
 #define HS_DEVICE           0x2

arch/arm/mach-omap2/Makefile

@@ -20,6 +20,7 @@ endif
 endif
 obj-y	+= utils.o
 
+obj-y	+= sysinfo-common.o
 ifneq ($(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),)
 obj-y	+= hwinit-common.o
 obj-y	+= clocks-common.o

arch/arm/mach-omap2/am33xx/Makefile

@@ -21,6 +21,8 @@ endif
 obj-$(CONFIG_TI816X)	+= ti816x_emif4.o
 obj-y	+= board.o
 obj-y	+= mux.o
+obj-y	+= prcm-regs.o
+obj-y	+= hw_data.o
 
 obj-$(CONFIG_CLOCK_SYNTHESIZER)	+= clk_synthesizer.o
 

arch/arm/mach-omap2/am33xx/board.c

@@ -26,6 +26,7 @@
 #include <asm/io.h>
 #include <asm/emif.h>
 #include <asm/gpio.h>
+#include <asm/omap_common.h>
 #include <i2c.h>
 #include <miiphy.h>
 #include <cpsw.h>
@@ -347,6 +348,7 @@ void early_system_init(void)
 #ifdef CONFIG_SPL_BUILD
 void board_init_f(ulong dummy)
 {
+	hw_data_init();
 	early_system_init();
 	board_early_init_f();
 	sdram_init();
@@ -361,6 +363,7 @@ void board_init_f(ulong dummy)
 
 int arch_cpu_init_dm(void)
 {
+	hw_data_init();
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 	early_system_init();
 #endif

arch/arm/mach-omap2/am33xx/hw_data.c

@@ -0,0 +1,19 @@
+/*
+ * HW data initialization for AM33xx.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/omap.h>
+#include <asm/omap_common.h>
+
+struct omap_sys_ctrl_regs const **ctrl =
+	(struct omap_sys_ctrl_regs const **)OMAP_SRAM_SCRATCH_SYS_CTRL;
+
+void hw_data_init(void)
+{
+	*ctrl = &am33xx_ctrl;
+}

arch/arm/mach-omap2/am33xx/prcm-regs.c

@@ -0,0 +1,15 @@
+/*
+ * HW regs data for AM33xx.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/hardware.h>
+#include <asm/omap_common.h>
+
+struct omap_sys_ctrl_regs const am33xx_ctrl = {
+	.control_status = CTRL_BASE + 0x40,
+};

arch/arm/mach-omap2/am33xx/sys_info.c

@@ -51,16 +51,6 @@ u32 get_cpu_type(void)
 }
 
 /**
- * get_device_type(): tell if GP/HS/EMU/TST
- */
-u32 get_device_type(void)
-{
-	int mode;
-	mode = readl(&cstat->statusreg) & (DEVICE_MASK);
-	return mode >>= 8;
-}
-
-/**
  * get_sysboot_value(void) - return SYS_BOOT[4:0]
  */
 u32 get_sysboot_value(void)

arch/arm/mach-omap2/hwinit-common.c

@@ -278,15 +278,6 @@ int checkboard(void)
 	return 0;
 }
 
-/*
- *  get_device_type(): tell if GP/HS/EMU/TST
- */
-u32 get_device_type(void)
-{
-	return (readl((*ctrl)->control_status) &
-				      (DEVICE_TYPE_MASK)) >> DEVICE_TYPE_SHIFT;
-}
-
 #if defined(CONFIG_DISPLAY_CPUINFO)
 /*
  * Print CPU information

arch/arm/mach-omap2/omap3/Makefile

@@ -14,6 +14,8 @@ obj-y	+= board.o
 obj-y	+= boot.o
 obj-y	+= clock.o
 obj-y	+= sys_info.o
+obj-y	+= prcm-regs.o
+obj-y	+= hw_data.o
 ifdef CONFIG_SPL_BUILD
 obj-$(CONFIG_SPL_OMAP3_ID_NAND)	+= spl_id_nand.o
 endif

arch/arm/mach-omap2/omap3/board.c

@@ -173,6 +173,11 @@ void try_unlock_memory(void)
 	return;
 }
 
+void early_system_init(void)
+{
+	hw_data_init();
+}
+
 /******************************************************************************
  * Routine: s_init
  * Description: Does early system init of muxing and clocks.
@@ -181,6 +186,7 @@ void try_unlock_memory(void)
 void s_init(void)
 {
 	watchdog_init();
+	early_system_init();
 
 	try_unlock_memory();
 
@@ -204,6 +210,7 @@ void s_init(void)
 #ifdef CONFIG_SPL_BUILD
 void board_init_f(ulong dummy)
 {
+	early_system_init();
 	mem_init();
 }
 #endif

arch/arm/mach-omap2/omap3/hw_data.c

@@ -0,0 +1,19 @@
+/*
+ * HW data initialization for OMAP3.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/omap.h>
+#include <asm/omap_common.h>
+
+struct omap_sys_ctrl_regs const **ctrl =
+	(struct omap_sys_ctrl_regs const **)OMAP_SRAM_SCRATCH_SYS_CTRL;
+
+void hw_data_init(void)
+{
+	*ctrl = &omap3_ctrl;
+}

arch/arm/mach-omap2/omap3/prcm-regs.c

@@ -0,0 +1,15 @@
+/*
+ * HW regs data for OMAP3.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/omap.h>
+#include <asm/omap_common.h>
+
+struct omap_sys_ctrl_regs const omap3_ctrl = {
+	.control_status = OMAP34XX_CTRL_BASE + 0x2F0,
+};

arch/arm/mach-omap2/omap3/sys_info.c

@@ -17,6 +17,7 @@
 #include <asm/arch/mem.h>	/* get mem tables */
 #include <asm/arch/sys_proto.h>
 #include <asm/bootm.h>
+#include <asm/omap_common.h>
 
 #include <i2c.h>
 #include <linux/compiler.h>
@@ -236,14 +237,6 @@ u32 get_boot_type(void)
 	return (readl(&ctrl_base->status) & SYSBOOT_MASK);
 }
 
-/*************************************************************
- *  get_device_type(): tell if GP/HS/EMU/TST
- *************************************************************/
-u32 get_device_type(void)
-{
-	return ((readl(&ctrl_base->status) & (DEVICE_MASK)) >> 8);
-}
-
 #ifdef CONFIG_DISPLAY_CPUINFO
 /**
  * Print CPU information

arch/arm/mach-omap2/sysinfo-common.c

@@ -0,0 +1,21 @@
+/*
+ * System information routines for all OMAP based boards.
+ *
+ * (C) Copyright 2017 Linaro Ltd.
+ * Sam Protsenko <semen.protsenko@linaro.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/omap.h>
+#include <asm/io.h>
+#include <asm/omap_common.h>
+
+/**
+ * Tell if device is GP/HS/EMU/TST.
+ */
+u32 get_device_type(void)
+{
+	return (readl((*ctrl)->control_status) & DEVICE_TYPE_MASK) >>
+		DEVICE_TYPE_SHIFT;
+}

board/ti/am335x/board.c

@@ -26,6 +26,7 @@
 #include <asm/io.h>
 #include <asm/emif.h>
 #include <asm/gpio.h>
+#include <asm/omap_common.h>
 #include <asm/omap_sec_common.h>
 #include <asm/omap_mmc.h>
 #include <i2c.h>

board/ti/am43xx/board.c

@@ -20,6 +20,7 @@
 #include <asm/arch/ddr_defs.h>
 #include <asm/arch/gpio.h>
 #include <asm/emif.h>
+#include <asm/omap_common.h>
 #include "../common/board_detect.h"
 #include "board.h"
 #include <power/pmic.h>