mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 16:07:30 +00:00
b3de92495f
Added support to find the bootmodes by reading slcr bootmode register. this can be helpful to autoboot the configurations w.r.t a specified bootmode. Added this functionality on board_late_init as it's not needed for normal initializtion part. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2013 Xilinx Inc.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <malloc.h>
|
|
#include <asm/arch/hardware.h>
|
|
|
|
#define SLCR_LOCK_MAGIC 0x767B
|
|
#define SLCR_UNLOCK_MAGIC 0xDF0D
|
|
|
|
#define SLCR_IDCODE_MASK 0x1F000
|
|
#define SLCR_IDCODE_SHIFT 12
|
|
|
|
static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
|
|
|
|
void zynq_slcr_lock(void)
|
|
{
|
|
if (!slcr_lock)
|
|
writel(SLCR_LOCK_MAGIC, &slcr_base->slcr_lock);
|
|
}
|
|
|
|
void zynq_slcr_unlock(void)
|
|
{
|
|
if (slcr_lock)
|
|
writel(SLCR_UNLOCK_MAGIC, &slcr_base->slcr_unlock);
|
|
}
|
|
|
|
/* Reset the entire system */
|
|
void zynq_slcr_cpu_reset(void)
|
|
{
|
|
/*
|
|
* Unlock the SLCR then reset the system.
|
|
* Note that this seems to require raw i/o
|
|
* functions or there's a lockup?
|
|
*/
|
|
zynq_slcr_unlock();
|
|
|
|
/*
|
|
* Clear 0x0F000000 bits of reboot status register to workaround
|
|
* the FSBL not loading the bitstream after soft-reboot
|
|
* This is a temporary solution until we know more.
|
|
*/
|
|
clrbits_le32(&slcr_base->reboot_status, 0xF000000);
|
|
|
|
writel(1, &slcr_base->pss_rst_ctrl);
|
|
}
|
|
|
|
/* Setup clk for network */
|
|
void zynq_slcr_gem_clk_setup(u32 gem_id, u32 rclk, u32 clk)
|
|
{
|
|
zynq_slcr_unlock();
|
|
|
|
if (gem_id > 1) {
|
|
printf("Non existing GEM id %d\n", gem_id);
|
|
goto out;
|
|
}
|
|
|
|
if (gem_id) {
|
|
/* Set divisors for appropriate frequency in GEM_CLK_CTRL */
|
|
writel(clk, &slcr_base->gem1_clk_ctrl);
|
|
/* Configure GEM_RCLK_CTRL */
|
|
writel(rclk, &slcr_base->gem1_rclk_ctrl);
|
|
} else {
|
|
/* Set divisors for appropriate frequency in GEM_CLK_CTRL */
|
|
writel(clk, &slcr_base->gem0_clk_ctrl);
|
|
/* Configure GEM_RCLK_CTRL */
|
|
writel(rclk, &slcr_base->gem0_rclk_ctrl);
|
|
}
|
|
udelay(100000);
|
|
out:
|
|
zynq_slcr_lock();
|
|
}
|
|
|
|
void zynq_slcr_devcfg_disable(void)
|
|
{
|
|
zynq_slcr_unlock();
|
|
|
|
/* Disable AXI interface */
|
|
writel(0xFFFFFFFF, &slcr_base->fpga_rst_ctrl);
|
|
|
|
/* Set Level Shifters DT618760 */
|
|
writel(0xA, &slcr_base->lvl_shftr_en);
|
|
|
|
zynq_slcr_lock();
|
|
}
|
|
|
|
void zynq_slcr_devcfg_enable(void)
|
|
{
|
|
zynq_slcr_unlock();
|
|
|
|
/* Set Level Shifters DT618760 */
|
|
writel(0xF, &slcr_base->lvl_shftr_en);
|
|
|
|
/* Disable AXI interface */
|
|
writel(0x0, &slcr_base->fpga_rst_ctrl);
|
|
|
|
zynq_slcr_lock();
|
|
}
|
|
|
|
u32 zynq_slcr_get_boot_mode(void)
|
|
{
|
|
/* Get the bootmode register value */
|
|
return readl(&slcr_base->boot_mode);
|
|
}
|
|
|
|
u32 zynq_slcr_get_idcode(void)
|
|
{
|
|
return (readl(&slcr_base->pss_idcode) & SLCR_IDCODE_MASK) >>
|
|
SLCR_IDCODE_SHIFT;
|
|
}
|