target/octeon: Add Linux 4.19 support

This commit adds support for Linux 4.19 kernel, various cleanups
listed below.

Drop 170-cisco-hack.patch as these devices never seems to have been
supported.

Unset kernel symbols:

* CONFIG_CAVIUM_CN63XXP1=y
  No supported hardware uses CN63XXP1 and it causes "slight decrease in
  performance"
  Source: https://cateee.net/lkddb/web-lkddb/CAVIUM_CN63XXP1.html

* CONFIG_USB_OCTEON_EHCI=y
  CONFIG_USB_OCTEON_OHCI=y
  Deprecated
  Source: https://cateee.net/lkddb/web-lkddb/USB_OCTEON_EHCI.html
  https://cateee.net/lkddb/web-lkddb/USB_OCTEON_OHCI.html

Removed kernel symbols:

* # CONFIG_ARCH_HIBERNATION_POSSIBLE=y
* CONFIG_ARCH_SUSPEND_POSSIBLE=y
  These are not in if you do a vanilla config of a MIPS Octeon kernel
  and I can't find any references about support on this platform.

* # CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
* CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
  No need to have this in by default, not defined in most other targets

* CONFIG_CRASH_CORE=y
  Can't find any documentation why this should be enabled by default

* CONFIG_DEBUG_INFO=y
  Set by https://github.com/openwrt/openwrt/blob/master/config/Config-kernel.in#L134

* CONFIG_DEBUG_SPINLOCK=y
  No need to have this in by default

* CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
  Already set by default
  Source: https://cateee.net/lkddb/web-lkddb/DEFAULT_HUNG_TASK_TIMEOUT.html

* CONFIG_DETECT_HUNG_TASK=y
  No need to have this in by default, not defined in most other targets

* CONFIG_HAVE_DEBUG_KMEMLEAK=y
  No need to have this in by default, not defined in most other targets

* CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
  No need to have this in by default

* CONFIG_HAVE_IDE=y
  None of the supported devices have IDE

* CONFIG_HZ=250
* # CONFIG_HZ_100 is not set
* CONFIG_HZ_250=y
  This is broken with generic config

* CONFIG_KALLSYMS=y
  No need to have this in by default, not defined in most other targets

* CONFIG_KEXEC=y
* CONFIG_KEXEC_CORE=y
  No need to have this in by default, not defined in most other targets

* CONFIG_HAVE_KVM=y
  No need to have this in by default

* CONFIG_SCHED_DEBUG=y
  No need to have this in by default, not defined in most other targets

* CONFIG_SYSFS_DEPRECATED=y
  Deprecated symbol
  Source: https://cateee.net/lkddb/web-lkddb/SYSFS_DEPRECATED.html

* CONFIG_SYSFS_DEPRECATED_V2=y
  Discouraged usage in general
  Source: https://cateee.net/lkddb/web-lkddb/SYSFS_DEPRECATED_V2.html

* CONFIG_UNINLINE_SPIN_UNLOCK=y
  No need to have this in by default, not defined in most other targets
  Source: https://github.com/openSUSE/kernel/blob/master/lib/Kconfig.debug#L1137

* CONFIG_ZLIB_INFLATE=y
  No need to have this in by default, not defined in most other targets

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

3 files changed, 112 insertions, 0 deletions

diff --git a/target/linux/octeon/patches-4.19/100-ubnt_edgerouter2_support.patch b/target/linux/octeon/patches-4.19/100-ubnt_edgerouter2_support.patch
new file mode 100644
index 0000000000..991eb56ce2
--- /dev/null
+++ b/target/linux/octeon/patches-4.19/100-ubnt_edgerouter2_support.patch
@@ -0,0 +1,31 @@
+--- a/arch/mips/include/asm/octeon/cvmx-bootinfo.h
++++ b/arch/mips/include/asm/octeon/cvmx-bootinfo.h
+@@ -295,6 +295,8 @@ enum cvmx_board_types_enum {
+ 	 */
+ 	CVMX_BOARD_TYPE_CUST_PRIVATE_MIN = 20001,
+ 	CVMX_BOARD_TYPE_UBNT_E100 = 20002,
++	CVMX_BOARD_TYPE_UBNT_E200 = 20003,
++	CVMX_BOARD_TYPE_UBNT_E220 = 20005,
+ 	CVMX_BOARD_TYPE_CUST_DSR1000N = 20006,
+ 	CVMX_BOARD_TYPE_KONTRON_S1901 = 21901,
+ 	CVMX_BOARD_TYPE_CUST_PRIVATE_MAX = 30000,
+@@ -396,6 +398,8 @@ static inline const char *cvmx_board_typ
+ 		    /* Customer private range */
+ 		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_CUST_PRIVATE_MIN)
+ 		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_UBNT_E100)
++		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_UBNT_E200)
++		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_UBNT_E220)
+ 		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_CUST_DSR1000N)
+ 		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_KONTRON_S1901)
+ 		ENUM_BRD_TYPE_CASE(CVMX_BOARD_TYPE_CUST_PRIVATE_MAX)
+--- a/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
++++ b/arch/mips/cavium-octeon/executive/cvmx-helper-board.c
+@@ -173,6 +173,8 @@ int cvmx_helper_board_get_mii_address(in
+ 			return 7 - ipd_port;
+ 		else
+ 			return -1;
++	case CVMX_BOARD_TYPE_UBNT_E200:
++		return -1;
+ 	case CVMX_BOARD_TYPE_KONTRON_S1901:
+ 		if (ipd_port == CVMX_HELPER_BOARD_MGMT_IPD_PORT)
+ 			return 1;
diff --git a/target/linux/octeon/patches-4.19/110-er200-ethernet_probe_order.patch b/target/linux/octeon/patches-4.19/110-er200-ethernet_probe_order.patch
new file mode 100644
index 0000000000..6b1eaf92a2
--- /dev/null
+++ b/target/linux/octeon/patches-4.19/110-er200-ethernet_probe_order.patch
@@ -0,0 +1,34 @@
+--- a/drivers/staging/octeon/ethernet.c
++++ b/drivers/staging/octeon/ethernet.c
+@@ -673,6 +673,7 @@ static int cvm_oct_probe(struct platform
+ 	int interface;
+ 	int fau = FAU_NUM_PACKET_BUFFERS_TO_FREE;
+ 	int qos;
++	int i;
+ 	struct device_node *pip;
+ 	int mtu_overhead = ETH_HLEN + ETH_FCS_LEN;
+ 
+@@ -796,13 +797,19 @@ static int cvm_oct_probe(struct platform
+ 	}
+ 
+ 	num_interfaces = cvmx_helper_get_number_of_interfaces();
+-	for (interface = 0; interface < num_interfaces; interface++) {
+-		cvmx_helper_interface_mode_t imode =
+-		    cvmx_helper_interface_get_mode(interface);
+-		int num_ports = cvmx_helper_ports_on_interface(interface);
++	for (i = 0; i < num_interfaces; i++) {
++		cvmx_helper_interface_mode_t imode;
++		int interface;
++		int num_ports;
+ 		int port;
+ 		int port_index;
+ 
++		interface = i;
++		if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_UBNT_E200)
++			interface = num_interfaces - (i + 1);
++
++		num_ports = cvmx_helper_ports_on_interface(interface);
++		imode = cvmx_helper_interface_get_mode(interface);
+ 		for (port_index = 0,
+ 		     port = cvmx_helper_get_ipd_port(interface, 0);
+ 		     port < cvmx_helper_get_ipd_port(interface, num_ports);
diff --git a/target/linux/octeon/patches-4.19/120-cmdline-hack.patch b/target/linux/octeon/patches-4.19/120-cmdline-hack.patch
new file mode 100644
index 0000000000..e902e853e8
--- /dev/null
+++ b/target/linux/octeon/patches-4.19/120-cmdline-hack.patch
@@ -0,0 +1,47 @@
+--- a/arch/mips/cavium-octeon/setup.c
++++ b/arch/mips/cavium-octeon/setup.c
+@@ -650,6 +650,35 @@ void octeon_user_io_init(void)
+ 	write_c0_derraddr1(0);
+ }
+ 
++#ifdef CONFIG_IMAGE_CMDLINE_HACK
++extern char __image_cmdline[];
++
++static int __init octeon_use_image_cmdline(void)
++{
++       char *p = __image_cmdline;
++       int replace = 0;
++
++       if (*p == '-') {
++               replace = 1;
++               p++;
++       }
++
++       if (*p == '\0')
++               return 0;
++
++       if (replace) {
++               strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
++       } else {
++               strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
++               strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
++       }
++
++       return 1;
++}
++#else
++static inline int octeon_use_image_cmdline(void) { return 0; }
++#endif
++
+ /**
+  * Early entry point for arch setup
+  */
+@@ -894,6 +923,8 @@ void __init prom_init(void)
+ 		}
+ 	}
+ 
++	octeon_use_image_cmdline();
++
+ 	if (strstr(arcs_cmdline, "console=") == NULL) {
+ 		if (octeon_uart == 1)
+ 			strcat(arcs_cmdline, " console=ttyS1,115200");