aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arc/plat-eznps/platform.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--arch/arc/plat-eznps/platform.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/arc/plat-eznps/platform.c b/arch/arc/plat-eznps/platform.c
new file mode 100644
index 000000000000..7ad6d2b8f12a
--- /dev/null
+++ b/arch/arc/plat-eznps/platform.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright(c) 2015 EZchip Technologies.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <asm/mach_desc.h>
+#include <plat/mtm.h>
+
+static void __init eznps_configure_msu(void)
+{
+ int cpu;
+ struct nps_host_reg_msu_en_cfg msu_en_cfg = {.value = 0};
+
+ msu_en_cfg.msu_en = 1;
+ msu_en_cfg.ipi_en = 1;
+ msu_en_cfg.gim_0_en = 1;
+ msu_en_cfg.gim_1_en = 1;
+
+ /* enable IPI and GIM messages on all clusters */
+ for (cpu = 0 ; cpu < eznps_max_cpus; cpu += eznps_cpus_per_cluster)
+ iowrite32be(msu_en_cfg.value,
+ nps_host_reg(cpu, NPS_MSU_BLKID, NPS_MSU_EN_CFG));
+}
+
+static void __init eznps_configure_gim(void)
+{
+ u32 reg_value;
+ u32 gim_int_lines;
+ struct nps_host_reg_gim_p_int_dst gim_p_int_dst = {.value = 0};
+
+ gim_int_lines = NPS_GIM_UART_LINE;
+ gim_int_lines |= NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE;
+ gim_int_lines |= NPS_GIM_DBG_LAN_EAST_RX_RDY_LINE;
+ gim_int_lines |= NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE;
+ gim_int_lines |= NPS_GIM_DBG_LAN_WEST_RX_RDY_LINE;
+
+ /*
+ * IRQ polarity
+ * low or high level
+ * negative or positive edge
+ */
+ reg_value = ioread32be(REG_GIM_P_INT_POL_0);
+ reg_value &= ~gim_int_lines;
+ iowrite32be(reg_value, REG_GIM_P_INT_POL_0);
+
+ /* IRQ type level or edge */
+ reg_value = ioread32be(REG_GIM_P_INT_SENS_0);
+ reg_value |= NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE;
+ reg_value |= NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE;
+ iowrite32be(reg_value, REG_GIM_P_INT_SENS_0);
+
+ /*
+ * GIM interrupt select type for
+ * dbg_lan TX and RX interrupts
+ * should be type 1
+ * type 0 = IRQ line 6
+ * type 1 = IRQ line 7
+ */
+ gim_p_int_dst.is = 1;
+ iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_10);
+ iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_11);
+ iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_25);
+ iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_26);
+
+ /*
+ * CTOP IRQ lines should be defined
+ * as blocking in GIM
+ */
+ iowrite32be(gim_int_lines, REG_GIM_P_INT_BLK_0);
+
+ /* enable CTOP IRQ lines in GIM */
+ iowrite32be(gim_int_lines, REG_GIM_P_INT_EN_0);
+}
+
+static void __init eznps_early_init(void)
+{
+ eznps_configure_msu();
+ eznps_configure_gim();
+}
+
+static const char *eznps_compat[] __initconst = {
+ "ezchip,arc-nps",
+ NULL,
+};
+
+MACHINE_START(NPS, "nps")
+ .dt_compat = eznps_compat,
+ .init_early = eznps_early_init,
+MACHINE_END