uart0-helloworld-sdboot: add support for Allwinner A80

The Allwinner A80 is quite an oddball: it uses a big.LITTLE configuration
with Arm Cortex-A7 and A15 cores, and has a completely different memory
map compared to all the other Allwinner SoCs.

Add support for this SoC, by adding the respective base addresses for its
peripherals and the pinmux into our SoC table.
It also requires a small extension to the SoC detection routine, to
accommodate for the different GIC mapping.

Tested on an Cubieboard 4 (CC-A80).

Signed-off-by: Andre Przywara <[email protected]>

Author: apritzel

uart0-helloworld-sdboot.c

@@ -67,6 +67,11 @@ typedef unsigned char u8;
 #define AW_CCM_BASE		0x01c20000
 #define AW_SRAMCTRL_BASE	0x01c00000
 
+#define A80_SRAMCTRL_BASE	0x00800000
+#define A80_CCM_BASE		0x06000000
+#define A80_PIO_BASE		0x06000800
+#define A80_UART0_BASE		0x07000000
+
 #define H6_UART0_BASE		0x05000000
 #define H6_PIO_BASE		0x0300B000
 #define H6_CCM_BASE		0x03001000
@@ -169,6 +174,7 @@ enum sunxi_gpio_number {
 #define FLAG_NEW_GPIO		BIT(2)
 #define FLAG_NEW_CLOCK		BIT(3)
 #define FLAG_UART_ON_APB1	BIT(4)
+#define FLAG_A80_CLOCK		BIT(5)
 
 #define FLAG_NCAT2		FLAG_NEW_GPIO | FLAG_NEW_CLOCK
 
@@ -191,6 +197,8 @@ static const struct soc_info {
 		SUNXI_UART0_BASE, SUNXI_GPB(19), MUX_2, FLAG_VAR1 | FLAG_UART_ON_PORTF },
 	{ 0x1633, "A31/A31s", SUNXI_PIO_BASE, AW_CCM_BASE, SRAM_A1_ADDR_0,
 		SUNXI_UART0_BASE, SUNXI_GPH(20), MUX_2, },
+	{ 0x1639, "A80", A80_PIO_BASE, A80_CCM_BASE, SRAM_A1_ADDR_10000,
+		A80_UART0_BASE, SUNXI_GPH(12), MUX_2, FLAG_A80_CLOCK },
 	{ 0x1651, "A20", SUNXI_PIO_BASE, AW_CCM_BASE, SRAM_A1_ADDR_0,
 		SUNXI_UART0_BASE, SUNXI_GPB(22), MUX_2 },
 	{ 0x1663, "F1C100s", SUNXI_PIO_BASE, AW_CCM_BASE, SRAM_A1_ADDR_0,
@@ -296,6 +304,7 @@ static int sunxi_gpio_set_pull(u32 pin, u32 val)
 
 #define VER_REG			(AW_SRAMCTRL_BASE + 0x24)
 #define H6_VER_REG		(H6_SRAMCTRL_BASE + 0x24)
+#define A80_VER_REG		(A80_SRAMCTRL_BASE + 0x24)
 #define SUN4I_SID_BASE		0x01C23800
 #define SUN8I_SID_BASE		0x01C14000
 
@@ -361,6 +370,8 @@ static const struct soc_info *sunxi_detect_soc(void)
 		reg = H6_VER_REG;
 	} else if ((readl(0x01c81008) & 0xfff) == 0x43b) {// GICD_IIDR @ legacy
 		reg = VER_REG;
+	} else if ((readl(0x01c41008) & 0xfff) == 0x43b) {// GICD_IIDR @ A80
+		reg = A80_VER_REG;
 	} else if ((readl(0x03400008) & 0xfff) == 0x43b) {// GICD_IIDR @ GIC-600
 		reg = H6_VER_REG;
 	} else {
@@ -407,6 +418,9 @@ static void clock_init_uart(const struct soc_info *soc)
 			bit = 20 + CONFIG_CONS_INDEX - 1;
 			gate_ofs = 0x068;
 			reset_ofs = 0x2d0;
+		} else if (soc->flags & FLAG_A80_CLOCK) {
+			gate_ofs = 0x594;
+			reset_ofs = 0x5b4;
 		}
 		/* Open the clock gate for UART0 */
 		set_wbit(soc->ccu_base + gate_ofs, 1U << bit);