sunxi: Add basic A33 basic support

Enable full support for the A33 SoC including display, otg-usb, etc.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

arch/arm/cpu/armv7/sunxi/Makefile

@@ -39,5 +39,6 @@ obj-$(CONFIG_MACH_SUN5I)	+= dram_sun4i.o
 obj-$(CONFIG_MACH_SUN6I)	+= dram_sun6i.o
 obj-$(CONFIG_MACH_SUN7I)	+= dram_sun4i.o
 obj-$(CONFIG_MACH_SUN8I_A23)	+= dram_sun8i_a23.o
+obj-$(CONFIG_MACH_SUN8I_A33)	+= dram_sun8i_a33.o
 obj-y	+= fel_utils.o
 endif

arch/arm/cpu/armv7/sunxi/cpu_info.c

@@ -66,6 +66,8 @@ int print_cpuinfo(void)
 	puts("CPU:   Allwinner A20 (SUN7I)\n");
 #elif defined CONFIG_MACH_SUN8I_A23
 	puts("CPU:   Allwinner A23 (SUN8I)\n");
+#elif defined CONFIG_MACH_SUN8I_A33
+	puts("CPU:   Allwinner A33 (SUN8I)\n");
 #else
 #warning Please update cpu_info.c with correct CPU information
 	puts("CPU:   SUNXI Family\n");

arch/arm/cpu/armv7/sunxi/usbc.c

@@ -28,7 +28,11 @@
 #endif
 
 #define SUNXI_USB_PMU_IRQ_ENABLE	0x800
+#ifdef CONFIG_MACH_SUN8I_A33
+#define SUNXI_USB_CSR			0x410
+#else
 #define SUNXI_USB_CSR			0x404
+#endif
 #define SUNXI_USB_PASSBY_EN		1
 
 #define SUNXI_EHCI_AHB_ICHR8_EN		(1 << 10)
@@ -103,6 +107,11 @@ static void usb_phy_write(struct sunxi_usbc_hcd *sunxi_usbc, int addr,
 	int j = 0, usbc_bit = 0;
 	void *dest = sunxi_usbc_get_io_base(0) + SUNXI_USB_CSR;
 
+#ifdef CONFIG_MACH_SUN8I_A33
+	/* CSR needs to be explicitly initialized to 0 on A33 */
+	writel(0, dest);
+#endif
+
 	usbc_bit = 1 << (sunxi_usbc->id * 2);
 	for (j = 0; j < len; j++) {
 		/* set the bit address to be written */

board/sunxi/Kconfig

@@ -52,6 +52,12 @@ config MACH_SUN8I_A23
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
 
+config MACH_SUN8I_A33
+	bool "sun8i (Allwinner A33)"
+	select CPU_V7
+	select SUNXI_GEN_SUN6I
+	select SUPPORT_SPL
+
 endchoice
 
 # The sun8i SoCs share a lot, this helps to avoid a lot of "if A23 || A33"

drivers/usb/musb-new/musb_regs.h

@@ -458,8 +458,13 @@ static inline u8 musb_read_ulpi_buscontrol(void __iomem *mbase)
 
 static inline u8 musb_read_configdata(void __iomem *mbase)
 {
+#ifdef CONFIG_MACH_SUN8I_A33
+	/* <Sigh> allwinner saves a reg, and we need to hardcode this */
+	return 0xde;
+#else
 	musb_writeb(mbase, MUSB_INDEX, 0);
 	return musb_readb(mbase, 0x10 + MUSB_CONFIGDATA);
+#endif
 }
 
 static inline u16 musb_read_hwvers(void __iomem *mbase)

drivers/video/sunxi_display.c

@@ -947,6 +947,9 @@ static void sunxi_drc_init(void)
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 
 	/* On sun6i the drc must be clocked even when in pass-through mode */
+#ifdef CONFIG_MACH_SUN8I_A33
+	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_SAT);
+#endif
 	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_DRC0);
 	clock_set_de_mod_clock(&ccm->iep_drc0_clk_cfg, 300000000);
 #endif