board: samsung: exynos-mobile: add exynos7870 support and three devices

Add basic support for the Exynos7870 SoC, this includes device tree
match logic using multiple boards, where devices use a stub dtb in
Samsung's QCDT format. S-BOOT, the previous stage bootloader, places its
cmdline arguments there, which has identifying information.

This is added with support for three devices:
 * Samsung Galaxy A2 Core (codename: a2corelte)
 * Samsung Galaxy J6 (codename: j6lte)
 * Samsung Galaxy J7 Prime (codename: on7xelte)

Add their device trees in the defconfig, and also enable the clock and
pin controller drivers.

Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/board/samsung/exynos-mobile/debug-exynos7870.config b/board/samsung/exynos-mobile/debug-exynos7870.config
new file mode 100644 (file)
index 0000000..1aa506a
--- /dev/null
+++ b/board/samsung/exynos-mobile/debug-exynos7870.config
@@ -0,0 +1,7 @@
+CONFIG_DEBUG_UART=y
+CONFIG_DEBUG_UART_BASE=0x13820000
+CONFIG_DEBUG_UART_CLOCK=133250000
+CONFIG_DEBUG_UART_S5P=y
+CONFIG_LOG=y
+CONFIG_LOG_CONSOLE=y
+CONFIG_LOG_MAX_LEVEL=8

diff --git a/board/samsung/exynos-mobile/exynos-mobile.c b/board/samsung/exynos-mobile/exynos-mobile.c
index c16281d..8ef3881 100644 (file)
--- a/board/samsung/exynos-mobile/exynos-mobile.c
+++ b/board/samsung/exynos-mobile/exynos-mobile.c
@@ -13,6 +13,7 @@
 #include <env.h>
 #include <errno.h>
 #include <init.h>
+#include <limits.h>
 #include <linux/sizes.h>
 #include <lmb.h>
 #include <part.h>
@@ -53,6 +54,96 @@ static struct mm_region exynos_mem_map[CONFIG_NR_DRAM_BANKS + 2] = {
 
 struct mm_region *mem_map = exynos_mem_map;
 
+static const u64 exynos7870_common_dram_bank_bases[CONFIG_NR_DRAM_BANKS] = {
+       0x40000000, 0x80000000, 0x100000000,
+};
+
+static const char *exynos_prev_bl_get_bootargs(void)
+{
+       void *prev_bl_fdt_base = (void *)get_prev_bl_fdt_addr();
+       int chosen_node_offset, ret;
+       const struct fdt_property *bootargs_prop;
+
+       ret = fdt_check_header(prev_bl_fdt_base);
+       if (ret < 0) {
+               log_err("%s: FDT is invalid (FDT_ERR %d)\n", __func__, ret);
+               return NULL;
+       }
+
+       ret = fdt_path_offset(prev_bl_fdt_base, "/chosen");
+       chosen_node_offset = ret;
+       if (ret < 0) {
+               log_err("%s: /chosen node not found (FDT_ERR %d)\n", __func__,
+                       ret);
+               return NULL;
+       }
+
+       bootargs_prop = fdt_get_property(prev_bl_fdt_base, chosen_node_offset,
+                                        "bootargs", &ret);
+       if (!bootargs_prop) {
+               log_err("%s: /chosen/bootargs property not found (FDT_ERR %d)\n",
+                       __func__, ret);
+               return NULL;
+       }
+
+       return bootargs_prop->data;
+}
+
+static int exynos7870_fdt_match(struct exynos_board_info *board_info)
+{
+       const char *prev_bl_bootargs;
+       int val, ret;
+
+       prev_bl_bootargs = exynos_prev_bl_get_bootargs();
+       if (!prev_bl_bootargs)
+               return -1;
+
+       /*
+        * Read the cmdline property which stores the
+        * bootloader/firmware version. An example value of the option
+        * can be: "J600GDXU3ARH5". This can be used to verify the model
+        * of the device.
+        */
+       ret = cmdline_get_arg(prev_bl_bootargs, "androidboot.bootloader", &val);
+       if (ret < 0) {
+               log_err("%s: unable to find property for bootloader version (%d)\n",
+                       __func__, ret);
+               return -1;
+       }
+
+       if (strncmp(prev_bl_bootargs + val, board_info->match_model,
+                   strlen(board_info->match_model)))
+               return -1;
+
+       /*
+        * Read the cmdline property which stores the hardware revision.
+        * This is required to allow selecting one of multiple dtbs
+        * available of a single device, varying in hardware changes in
+        * different revisions.
+        */
+       ret = cmdline_get_arg(prev_bl_bootargs, "androidboot.revision", &val);
+       if (ret < 0)
+               ret = cmdline_get_arg(prev_bl_bootargs, "androidboot.hw_rev", &val);
+       if (ret < 0) {
+               log_err("%s: unable to find property for bootloader revision (%d)\n",
+                       __func__, ret);
+               return -1;
+       }
+
+       if (strtoul(prev_bl_bootargs + val, NULL, 10) > board_info->match_max_rev)
+               return -1;
+
+       /*
+        * Read the cmdline property which stores the serial number.
+        * Store this in the board info struct.
+        */
+       ret = cmdline_get_arg(prev_bl_bootargs, "androidboot.serialno", &val);
+       if (ret > 0)
+               strlcpy(board_info->serial, prev_bl_bootargs + val, ret);
+
+       return 0;
+}
+
 /*
  * This array is used for matching the models and revisions with the
  * devicetree used by U-Boot. This allows a single U-Boot to work on
@@ -62,6 +153,31 @@ struct mm_region *mem_map = exynos_mem_map;
  * board names.
  */
 static struct exynos_board_info exynos_board_info_match[] = {
+       {
+               /* Samsung Galaxy A2 Core */
+               .name = "a2corelte",
+               .chip = "exynos7870",
+               .dram_bank_bases = exynos7870_common_dram_bank_bases,
+               .match = exynos7870_fdt_match,
+               .match_model = "A260",
+               .match_max_rev = U8_MAX,
+       }, {
+               /* Samsung Galaxy J6 */
+               .name = "j6lte",
+               .chip = "exynos7870",
+               .dram_bank_bases = exynos7870_common_dram_bank_bases,
+               .match = exynos7870_fdt_match,
+               .match_model = "J600",
+               .match_max_rev = U8_MAX,
+       }, {
+               /* Samsung Galaxy J7 Prime */
+               .name = "on7xelte",
+               .chip = "exynos7870",
+               .dram_bank_bases = exynos7870_common_dram_bank_bases,
+               .match = exynos7870_fdt_match,
+               .match_model = "G610",
+               .match_max_rev = U8_MAX,
+       },
 };
 
 static void exynos_parse_dram_banks(const struct exynos_board_info *board_info,

diff --git a/configs/exynos-mobile_defconfig b/configs/exynos-mobile_defconfig
index 2dbf900..81a2c4d 100644 (file)
--- a/configs/exynos-mobile_defconfig
+++ b/configs/exynos-mobile_defconfig
@@ -7,6 +7,7 @@ CONFIG_SYS_MALLOC_LEN=0x2000000
 CONFIG_SYS_MALLOC_F_LEN=0x16000
 CONFIG_TARGET_EXYNOS_MOBILE=y
 CONFIG_NR_DRAM_BANKS=3
+CONFIG_DEFAULT_DEVICE_TREE="exynos/exynos7870-a2corelte"
 CONFIG_SYS_BOOTM_LEN=0x2000000
 CONFIG_SYS_LOAD_ADDR=0x80000000
 CONFIG_ARMV8_CNTFRQ_BROKEN=y
@@ -24,11 +25,13 @@ CONFIG_CMD_POWEROFF=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_EFI_PARTITION=y
 CONFIG_OF_UPSTREAM=y
+CONFIG_OF_LIST="exynos/exynos7870-a2corelte exynos/exynos7870-j6lte exynos/exynos7870-on7xelte"
 CONFIG_MULTI_DTB_FIT=y
 CONFIG_BUTTON=y
 CONFIG_BUTTON_REMAP_PHONE_KEYS=y
 CONFIG_CLK=y
 CONFIG_CLK_CCF=y
+CONFIG_CLK_EXYNOS7870=y
 CONFIG_USB_FUNCTION_FASTBOOT=y
 CONFIG_FASTBOOT_BUF_ADDR=0xdead0000
 CONFIG_FASTBOOT_FLASH=y
@@ -44,6 +47,7 @@ CONFIG_MMC_DW=y
 CONFIG_PHY=y
 CONFIG_PHY_EXYNOS_USBDRD=y
 CONFIG_PINCTRL=y
+CONFIG_PINCTRL_EXYNOS78x0=y
 CONFIG_DM_PMIC=y
 CONFIG_PMIC_S2MPS11=y
 CONFIG_DM_REGULATOR=y