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u-boot/arch/arm/mach-socfpga/misc_gen5.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
*/
#include <common.h>
#include <cpu_func.h>
#include <init.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <env.h>
#include <errno.h>
#include <fdtdec.h>
#include <linux/bitops.h>
#include <linux/libfdt.h>
#include <altera.h>
#include <miiphy.h>
#include <netdev.h>
#include <watchdog.h>
#include <asm/arch/misc.h>
#include <asm/arch/reset_manager.h>
#include <asm/arch/scan_manager.h>
#include <asm/arch/sdram.h>
#include <asm/arch/system_manager.h>
#include <asm/arch/nic301.h>
#include <asm/arch/scu.h>
#include <asm/pl310.h>
#include <dt-bindings/reset/altr,rst-mgr.h>
DECLARE_GLOBAL_DATA_PTR;
static struct pl310_regs *const pl310 =
(struct pl310_regs *)CONFIG_SYS_PL310_BASE;
static struct nic301_registers *nic301_regs =
(struct nic301_registers *)SOCFPGA_L3REGS_ADDRESS;
static struct scu_registers *scu_regs =
(struct scu_registers *)SOCFPGA_MPUSCU_ADDRESS;
/*
* FPGA programming support for SoC FPGA Cyclone V
*/
static Altera_desc altera_fpga[] = {
{
/* Family */
Altera_SoCFPGA,
/* Interface type */
fast_passive_parallel,
/* No limitation as additional data will be ignored */
-1,
/* No device function table */
NULL,
/* Base interface address specified in driver */
NULL,
/* No cookie implementation */
0
},
};
static const struct {
const u16 pn;
const char *name;
const char *var;
} socfpga_fpga_model[] = {
/* Cyclone V E */
{ 0x2b15, "Cyclone V, E/A2", "cv_e_a2" },
{ 0x2b05, "Cyclone V, E/A4", "cv_e_a4" },
{ 0x2b22, "Cyclone V, E/A5", "cv_e_a5" },
{ 0x2b13, "Cyclone V, E/A7", "cv_e_a7" },
{ 0x2b14, "Cyclone V, E/A9", "cv_e_a9" },
/* Cyclone V GX/GT */
{ 0x2b01, "Cyclone V, GX/C3", "cv_gx_c3" },
{ 0x2b12, "Cyclone V, GX/C4", "cv_gx_c4" },
{ 0x2b02, "Cyclone V, GX/C5 or GT/D5", "cv_gx_c5" },
{ 0x2b03, "Cyclone V, GX/C7 or GT/D7", "cv_gx_c7" },
{ 0x2b04, "Cyclone V, GX/C9 or GT/D9", "cv_gx_c9" },
/* Cyclone V SE/SX/ST */
{ 0x2d11, "Cyclone V, SE/A2 or SX/C2", "cv_se_a2" },
{ 0x2d01, "Cyclone V, SE/A4 or SX/C4", "cv_se_a4" },
{ 0x2d12, "Cyclone V, SE/A5 or SX/C5 or ST/D5", "cv_se_a5" },
{ 0x2d02, "Cyclone V, SE/A6 or SX/C6 or ST/D6", "cv_se_a6" },
/* Arria V */
{ 0x2d03, "Arria V, D5", "av_d5" },
/* Arria V ST/SX */
{ 0x2d13, "Arria V, ST/D3 or SX/B3", "av_st_d3" },
};
static int socfpga_fpga_id(const bool print_id)
{
const u32 altera_mi = 0x6e;
const u32 id = scan_mgr_get_fpga_id();
const u32 lsb = id & 0x00000001;
const u32 mi = (id >> 1) & 0x000007ff;
const u32 pn = (id >> 12) & 0x0000ffff;
const u32 version = (id >> 28) & 0x0000000f;
int i;
if ((mi != altera_mi) || (lsb != 1)) {
printf("FPGA: Not Altera chip ID\n");
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(socfpga_fpga_model); i++)
if (pn == socfpga_fpga_model[i].pn)
break;
if (i == ARRAY_SIZE(socfpga_fpga_model)) {
printf("FPGA: Unknown Altera chip, ID 0x%08x\n", id);
return -EINVAL;
}
if (print_id)
printf("FPGA: Altera %s, version 0x%01x\n",
socfpga_fpga_model[i].name, version);
return i;
}
/*
* Print CPU information
*/
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo(void)
{
const u32 bootinfo = readl(socfpga_get_sysmgr_addr() +
SYSMGR_GEN5_BOOTINFO);
const u32 bsel = SYSMGR_GET_BOOTINFO_BSEL(bootinfo);
puts("CPU: Altera SoCFPGA Platform\n");
socfpga_fpga_id(1);
printf("BOOT: %s\n", bsel_str[bsel].name);
return 0;
}
#endif
#ifdef CONFIG_ARCH_MISC_INIT
int arch_misc_init(void)
{
const u32 bsel = readl(socfpga_get_sysmgr_addr() +
SYSMGR_GEN5_BOOTINFO) & 0x7;
const int fpga_id = socfpga_fpga_id(0);
env_set("bootmode", bsel_str[bsel].mode);
if (fpga_id >= 0)
env_set("fpgatype", socfpga_fpga_model[fpga_id].var);
return 0;
}
#endif
/*
* Convert all NIC-301 AMBA slaves from secure to non-secure
*/
static void socfpga_nic301_slave_ns(void)
{
writel(0x1, &nic301_regs->lwhps2fpgaregs);
writel(0x1, &nic301_regs->hps2fpgaregs);
writel(0x1, &nic301_regs->acp);
writel(0x1, &nic301_regs->rom);
writel(0x1, &nic301_regs->ocram);
writel(0x1, &nic301_regs->sdrdata);
}
void socfpga_sdram_remap_zero(void)
{
u32 remap;
socfpga_nic301_slave_ns();
/*
* Private components security:
* U-Boot : configure private timer, global timer and cpu component
* access as non secure for kernel stage (as required by Linux)
*/
setbits_le32(&scu_regs->sacr, 0xfff);
/* Configure the L2 controller to make SDRAM start at 0 */
remap = 0x1; /* remap.mpuzero */
/* Keep fpga bridge enabled when running from FPGA onchip RAM */
if (socfpga_is_booting_from_fpga())
remap |= 0x8; /* remap.hps2fpga */
writel(remap, &nic301_regs->remap);
writel(0x1, &pl310->pl310_addr_filter_start);
}
static u32 iswgrp_handoff[8];
int arch_early_init_r(void)
{
int i;
/*
* Write magic value into magic register to unlock support for
* issuing warm reset. The ancient kernel code expects this
* value to be written into the register by the bootloader, so
* to support that old code, we write it here instead of in the
* reset_cpu() function just before resetting the CPU.
*/
writel(0xae9efebc,
socfpga_get_sysmgr_addr() + SYSMGR_GEN5_WARMRAMGRP_EN);
for (i = 0; i < 8; i++) /* Cache initial SW setting regs */
iswgrp_handoff[i] = readl(socfpga_get_sysmgr_addr() +
SYSMGR_ISWGRP_HANDOFF_OFFSET(i));
socfpga_bridges_reset(1);
socfpga_sdram_remap_zero();
/* Add device descriptor to FPGA device table */
socfpga_fpga_add(&altera_fpga[0]);
return 0;
}
#ifndef CONFIG_SPL_BUILD
static struct socfpga_sdr_ctrl *sdr_ctrl =
(struct socfpga_sdr_ctrl *)SDR_CTRLGRP_ADDRESS;
void do_bridge_reset(int enable, unsigned int mask)
{
int i;
if (enable) {
socfpga_bridges_set_handoff_regs(!(mask & BIT(0)),
!(mask & BIT(1)),
!(mask & BIT(2)));
for (i = 0; i < 2; i++) { /* Reload SW setting cache */
iswgrp_handoff[i] =
readl(socfpga_get_sysmgr_addr() +
SYSMGR_ISWGRP_HANDOFF_OFFSET(i));
}
writel(iswgrp_handoff[2],
socfpga_get_sysmgr_addr() +
SYSMGR_GEN5_FPGAINFGRP_MODULE);
writel(iswgrp_handoff[3], &sdr_ctrl->fpgaport_rst);
writel(iswgrp_handoff[0],
socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
writel(iswgrp_handoff[1], &nic301_regs->remap);
ARM: socfpga: Purge pending transactions upon enabling bridges on Gen5 On Gen5, when the FPGA is loaded and there was some prior interaction between the HPS and the FPGA via bridges (e.g. Linux was running and using some of the IPs in the FPGA) followed by warm reset, it has been observed that there might be outstanding unfinished transactions. This leads to an obscure misbehavior of the bridge. When the bridge is enabled again in U-Boot and there are outstanding transactions, a read from within the bridge address range would return a result of the previous read instead. Example: => bridge enable ; md 0xff200000 1 ff200000: 1234abcd => bridge enable ; md 0xff200010 1 ff200010: 5678dcba <------- this is in fact a value which is stored in a memory at 0xff200000 => bridge enable ; md 0xff200000 1 ff200000: 90effe09 <------- this is in fact a value which is stored in a memory at 0xff200010 and so it continues. Issuing a write does lock the system up completely. This patch opens the FPGA bridges in 'bridge enable' command, the tears them down again, and then opens them again. This allows these outstanding transactions to complete and makes this misbehavior go away. However, it is not entirely clear whether this is the correct solution. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Chin Liang See <chin.liang.see@intel.com> Cc: Dalon Westergreen <dwesterg@gmail.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Cc: Tien Fong Chee <tien.fong.chee@intel.com> Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
2019-11-20 21:34:31 +00:00
writel(0x7, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
writel(iswgrp_handoff[0],
socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
} else {
writel(0, socfpga_get_sysmgr_addr() +
SYSMGR_GEN5_FPGAINFGRP_MODULE);
writel(0, &sdr_ctrl->fpgaport_rst);
writel(0x7, socfpga_get_rstmgr_addr() + RSTMGR_GEN5_BRGMODRST);
writel(1, &nic301_regs->remap);
}
}
#endif