brcm63xx: add linux 4.19 support

Boot tested on Comtrend AR-5387un:
https://gist.github.com/Noltari/57e5030455da8dc38e61f8c3a5922254

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
[jonas.gorski: make 4.19 an optional testing version; add gcc 8.3 fix]
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.19/511-board_V2500V.patch b/target/linux/brcm63xx/patches-4.19/511-board_V2500V.patch
new file mode 100644
index 0000000000..2d8bcceff2
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.19/511-board_V2500V.patch
@@ -0,0 +1,92 @@
+--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
++++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
+@@ -435,6 +435,26 @@ static struct board_info __initdata boar
+ 	.has_pccard			= 1,
+ 	.has_ehci0			= 1,
+ };
++
++static struct board_info __initdata board_V2500V_BB = {
++	.name				= "V2500V_BB",
++        .expected_cpu_id                = 0x6348,
++
++        .has_enet0                      = 1,
++        .has_enet1                      = 1,
++        .has_pci                        = 1,
++
++        .enet0 = {
++                .has_phy                = 1,
++                .use_internal_phy       = 1,
++        },
++        .enet1 = {
++		.has_phy		= 1,
++		.phy_id			= 0,
++                .force_speed_100        = 1,
++                .force_duplex_full      = 1,
++	},
++};
+ #endif /* CONFIG_BCM63XX_CPU_6348 */
+ 
+ /*
+@@ -707,6 +727,7 @@ static const struct board_info __initcon
+ 	&board_96348_D4PW,
+ 	&board_spw500v,
+ 	&board_96348sv,
++	&board_V2500V_BB,
+ #endif
+ 
+ #ifdef CONFIG_BCM63XX_CPU_6358
+@@ -746,6 +767,7 @@ static struct of_device_id const bcm963x
+ 	{ .compatible = "brcm,bcm96348gw-10", .data = &board_96348gw_10, },
+ 	{ .compatible = "brcm,bcm96348gw-11", .data = &board_96348gw_11, },
+ 	{ .compatible = "brcm,bcm96348gw-a", .data = &board_96348gw_a, },
++	{ .compatible = "bt,v2500v-bb", .data = &board_V2500V_BB, },
+ 	{ .compatible = "d-link,dsl-2640b-b", .data = &board_96348_D4PW, },
+ 	{ .compatible = "davolink,dv-201amr", .data = &board_DV201AMR, },
+ 	{ .compatible = "dynalink,rta1025w", .data = &board_rta1025w_16, },
+@@ -805,6 +827,22 @@ void __init board_bcm963xx_init(void)
+ 		val &= MPI_CSBASE_BASE_MASK;
+ 	}
+ 	boot_addr = (u8 *)KSEG1ADDR(val);
++	pr_info("Boot address 0x%08x\n",(unsigned int)boot_addr);
++
++	/* BT Voyager 2500V (RTA1046VW PCB) has 8 Meg flash used as two */
++	/* banks of 4 Meg. The byte at 0xBF800000 identifies the back to use.*/
++	/* Loading firmware from the CFE Prompt always loads to Bank 0 */
++	/* Do an early check of CFE and then select bank 0 */
++
++	if (boot_addr == (u8 *)0xbf800000) {
++		u8 *tmp_boot_addr = (u8*)0xbfc00000;
++
++		bcm63xx_nvram_init(tmp_boot_addr + BCM963XX_NVRAM_OFFSET);
++		if (!strcmp(bcm63xx_nvram_get_name(), "V2500V_BB")) {
++			pr_info("V2500V: nvram bank 0\n");
++			boot_addr = tmp_boot_addr;
++		}
++	}
+ 
+ 	/* dump cfe version */
+ 	cfe = boot_addr + BCM963XX_CFE_VERSION_OFFSET;
+--- a/arch/mips/bcm63xx/dev-flash.c
++++ b/arch/mips/bcm63xx/dev-flash.c
+@@ -21,6 +21,7 @@
+ #include <linux/spi/spi.h>
+ #include <linux/spi/flash.h>
+ 
++#include <bcm63xx_board.h>
+ #include <bcm63xx_cpu.h>
+ #include <bcm63xx_dev_flash.h>
+ #include <bcm63xx_regs.h>
+@@ -247,6 +248,13 @@ int __init bcm63xx_flash_register(void)
+ 			val = bcm_mpi_readl(MPI_CSBASE_REG(0));
+ 			val &= MPI_CSBASE_BASE_MASK;
+ 
++			/* BT Voyager 2500V has 8 Meg flash in two 4 Meg banks */
++			/* Loading from CFE always uses Bank 0 */
++			if (!strcmp(board_get_name(), "V2500V_BB")) {
++				pr_info("V2500V: Start in Bank 0\n");
++				val = val + 0x400000; // Select Bank 0 start address
++			}
++
+ 			mtd_resources[0].start = val;
+ 			mtd_resources[0].end = 0x1FFFFFFF;
+ 		}