// SPDX-License-Identifier: GPL-2.0+
/*
* Board specific initialization for IOT2050
- * Copyright (c) Siemens AG, 2018-2021
+ * Copyright (c) Siemens AG, 2018-2022
*
* Authors:
* Le Jin <le.jin@siemens.com>
#include <common.h>
#include <bootstage.h>
#include <dm.h>
+#include <fdt_support.h>
#include <i2c.h>
#include <led.h>
#include <malloc.h>
+#include <mapmem.h>
#include <net.h>
#include <phy.h>
#include <spl.h>
DECLARE_GLOBAL_DATA_PTR;
+struct gpio_config {
+ const char *gpio_name;
+ const char *label;
+};
+
+enum m2_connector_mode {
+ BKEY_PCIEX2 = 0,
+ BKEY_PCIE_EKEY_PCIE,
+ BKEY_USB30_EKEY_PCIE,
+ CONNECTOR_MODE_INVALID
+};
+
+struct m2_config_pins {
+ int config[4];
+};
+
+struct serdes_mux_control {
+ int ctrl_usb30_pcie0_lane0;
+ int ctrl_pcie1_pcie0;
+ int ctrl_usb30_pcie0_lane1;
+};
+
+struct m2_config_table {
+ struct m2_config_pins config_pins;
+ enum m2_connector_mode mode;
+};
+
+static const struct gpio_config serdes_mux_ctl_pin_info[] = {
+ {"gpio@600000_88", "CTRL_USB30_PCIE0_LANE0"},
+ {"gpio@600000_82", "CTRL_PCIE1_PCIE0"},
+ {"gpio@600000_89", "CTRL_USB30_PCIE0_LANE1"},
+};
+
+static const struct gpio_config m2_bkey_cfg_pin_info[] = {
+ {"gpio@601000_18", "KEY_CONFIG_0"},
+ {"gpio@601000_19", "KEY_CONFIG_1"},
+ {"gpio@601000_88", "KEY_CONFIG_2"},
+ {"gpio@601000_89", "KEY_CONFIG_3"},
+};
+
+static const struct m2_config_table m2_config_table[] = {
+ {{{0, 1, 0, 0}}, BKEY_PCIEX2},
+ {{{0, 0, 1, 0}}, BKEY_PCIE_EKEY_PCIE},
+ {{{0, 1, 1, 0}}, BKEY_PCIE_EKEY_PCIE},
+ {{{1, 0, 0, 1}}, BKEY_PCIE_EKEY_PCIE},
+ {{{1, 1, 0, 1}}, BKEY_PCIE_EKEY_PCIE},
+ {{{0, 0, 0, 1}}, BKEY_USB30_EKEY_PCIE},
+ {{{0, 1, 0, 1}}, BKEY_USB30_EKEY_PCIE},
+ {{{0, 0, 1, 1}}, BKEY_USB30_EKEY_PCIE},
+ {{{0, 1, 1, 1}}, BKEY_USB30_EKEY_PCIE},
+ {{{1, 0, 1, 1}}, BKEY_USB30_EKEY_PCIE},
+};
+
+static const struct serdes_mux_control serdes_mux_ctrl[] = {
+ [BKEY_PCIEX2] = {0, 0, 1},
+ [BKEY_PCIE_EKEY_PCIE] = {0, 1, 0},
+ [BKEY_USB30_EKEY_PCIE] = {1, 1, 0},
+};
+
+static const char *m2_connector_mode_name[] = {
+ [BKEY_PCIEX2] = "PCIe x2 (key B)",
+ [BKEY_PCIE_EKEY_PCIE] = "PCIe (key B) / PCIe (key E)",
+ [BKEY_USB30_EKEY_PCIE] = "USB 3.0 (key B) / PCIe (key E)",
+};
+
+static enum m2_connector_mode connector_mode;
+
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+static void *connector_overlay;
+static u32 connector_overlay_size;
+#endif
+
+static int get_pinvalue(const char *gpio_name, const char *label)
+{
+ struct gpio_desc gpio;
+
+ if (dm_gpio_lookup_name(gpio_name, &gpio) < 0 ||
+ dm_gpio_request(&gpio, label) < 0 ||
+ dm_gpio_set_dir_flags(&gpio, GPIOD_IS_IN) < 0) {
+ pr_err("Cannot get pin %s for M.2 configuration\n", gpio_name);
+ return 0;
+ }
+
+ return dm_gpio_get_value(&gpio);
+}
+
+static void set_pinvalue(const char *gpio_name, const char *label, int value)
+{
+ struct gpio_desc gpio;
+
+ if (dm_gpio_lookup_name(gpio_name, &gpio) < 0 ||
+ dm_gpio_request(&gpio, label) < 0 ||
+ dm_gpio_set_dir_flags(&gpio, GPIOD_IS_OUT) < 0) {
+ pr_err("Cannot set pin %s for M.2 configuration\n", gpio_name);
+ return;
+ }
+ dm_gpio_set_value(&gpio, value);
+}
+
+static bool board_is_m2(void)
+{
+ struct iot2050_info *info = IOT2050_INFO_DATA;
+
+ return IS_ENABLED(CONFIG_TARGET_IOT2050_A53_PG2) &&
+ info->magic == IOT2050_INFO_MAGIC &&
+ strcmp((char *)info->name, "IOT2050-ADVANCED-M2") == 0;
+}
+
static bool board_is_advanced(void)
{
struct iot2050_info *info = IOT2050_INFO_DATA;
if (board_is_advanced()) {
if (IS_ENABLED(CONFIG_TARGET_IOT2050_A53_PG1))
fdtfile = "ti/k3-am6548-iot2050-advanced.dtb";
+ else if(board_is_m2())
+ fdtfile = "ti/k3-am6548-iot2050-advanced-m2.dtb";
else
fdtfile = "ti/k3-am6548-iot2050-advanced-pg2.dtb";
} else {
env_save();
}
+static void m2_overlay_prepare(void)
+{
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+ const char *overlay_path;
+ void *overlay;
+ u64 loadaddr;
+ ofnode node;
+ int ret;
+
+ if (connector_mode == BKEY_PCIEX2)
+ return;
+
+ if (connector_mode == BKEY_PCIE_EKEY_PCIE)
+ overlay_path = "/fit-images/bkey-ekey-pcie-overlay";
+ else
+ overlay_path = "/fit-images/bkey-usb3-overlay";
+
+ node = ofnode_path(overlay_path);
+ if (!ofnode_valid(node))
+ goto fit_error;
+
+ ret = ofnode_read_u64(node, "load", &loadaddr);
+ if (ret)
+ goto fit_error;
+
+ ret = ofnode_read_u32(node, "size", &connector_overlay_size);
+ if (ret)
+ goto fit_error;
+
+ overlay = map_sysmem(loadaddr, connector_overlay_size);
+
+ connector_overlay = malloc(connector_overlay_size);
+ if (!connector_overlay)
+ goto fit_error;
+
+ memcpy(connector_overlay, overlay, connector_overlay_size);
+ return;
+
+fit_error:
+ pr_err("M.2 device tree overlay %s not available,\n", overlay_path);
+#endif
+}
+
+static void m2_connector_setup(void)
+{
+ ulong m2_manual_config = env_get_ulong("m2_manual_config", 10,
+ CONNECTOR_MODE_INVALID);
+ const char *mode_info = "";
+ struct m2_config_pins config_pins;
+ unsigned int n;
+
+ /* enable M.2 connector power */
+ set_pinvalue("gpio@601000_17", "P3V3_M2_EN", 1);
+ udelay(4 * 100);
+
+ if (m2_manual_config < CONNECTOR_MODE_INVALID) {
+ mode_info = " [manual mode]";
+ connector_mode = m2_manual_config;
+ } else { /* auto detection */
+ for (n = 0; n < ARRAY_SIZE(config_pins.config); n++)
+ config_pins.config[n] =
+ get_pinvalue(m2_bkey_cfg_pin_info[n].gpio_name,
+ m2_bkey_cfg_pin_info[n].label);
+ connector_mode = CONNECTOR_MODE_INVALID;
+ for (n = 0; n < ARRAY_SIZE(m2_config_table); n++) {
+ if (!memcmp(config_pins.config,
+ m2_config_table[n].config_pins.config,
+ sizeof(config_pins.config))) {
+ connector_mode = m2_config_table[n].mode;
+ break;
+ }
+ }
+ if (connector_mode == CONNECTOR_MODE_INVALID) {
+ mode_info = " [fallback, card unknown/unsupported]";
+ connector_mode = BKEY_USB30_EKEY_PCIE;
+ }
+ }
+
+ printf("M.2: %s%s\n", m2_connector_mode_name[connector_mode],
+ mode_info);
+
+ /* configure serdes mux */
+ set_pinvalue(serdes_mux_ctl_pin_info[0].gpio_name,
+ serdes_mux_ctl_pin_info[0].label,
+ serdes_mux_ctrl[connector_mode].ctrl_usb30_pcie0_lane0);
+ set_pinvalue(serdes_mux_ctl_pin_info[1].gpio_name,
+ serdes_mux_ctl_pin_info[1].label,
+ serdes_mux_ctrl[connector_mode].ctrl_pcie1_pcie0);
+ set_pinvalue(serdes_mux_ctl_pin_info[2].gpio_name,
+ serdes_mux_ctl_pin_info[2].label,
+ serdes_mux_ctrl[connector_mode].ctrl_usb30_pcie0_lane1);
+
+ m2_overlay_prepare();
+}
+
int board_init(void)
{
return 0;
/* change CTRL_MMR register to let serdes0 not output USB3.0 signals. */
writel(0x3, SERDES0_LANE_SELECT);
+ if (board_is_m2())
+ m2_connector_setup();
+
set_board_info_env();
/* remove the eMMC if requested via button */
}
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+static void m2_fdt_fixup(void *blob)
+{
+ void *overlay_copy = NULL;
+ void *fdt_copy = NULL;
+ u32 fdt_size;
+ int err;
+
+ if (!connector_overlay)
+ return;
+
+ /*
+ * We need to work with temporary copies here because fdt_overlay_apply
+ * is destructive to the overlay and also to the target blob, even if
+ * application fails.
+ */
+ fdt_size = fdt_totalsize(blob);
+ fdt_copy = malloc(fdt_size);
+ if (!fdt_copy)
+ goto fixup_error;
+
+ memcpy(fdt_copy, blob, fdt_size);
+
+ overlay_copy = malloc(connector_overlay_size);
+ if (!overlay_copy)
+ goto fixup_error;
+
+ memcpy(overlay_copy, connector_overlay, connector_overlay_size);
+
+ err = fdt_overlay_apply_verbose(fdt_copy, overlay_copy);
+ if (err)
+ goto fixup_error;
+
+ memcpy(blob, fdt_copy, fdt_size);
+
+cleanup:
+ free(fdt_copy);
+ free(overlay_copy);
+ return;
+
+fixup_error:
+ pr_err("Could not apply M.2 device tree overlay\n");
+ goto cleanup;
+}
+
int ft_board_setup(void *blob, struct bd_info *bd)
{
int ret;
if (ret)
pr_err("%s: fixing up msmc ram failed %d\n", __func__, ret);
+ if (board_is_m2())
+ m2_fdt_fixup(blob);
+
return ret;
}
#endif
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