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/*
* 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
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