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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Siemens AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that 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.
*/
#include <bootstate.h>
#include <console/console.h>
#include <device/pci_def.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <hwilib.h>
#include <intelblocks/lpc_lib.h>
#include <timer.h>
#include <timestamp.h>
#include <baseboard/variants.h>
#include <soc/pci_devs.h>
#include <types.h>
#define SD_CAP_BYP 0x810
#define SD_CAP_BYP_EN 0x5A
#define SD_CAP_BYP_REG1 0x814
void variant_mainboard_final(void)
{
struct device *dev;
uint16_t cmd = 0;
/* Set Master Enable for on-board PCI device. */
dev = dev_find_device(PCI_VENDOR_ID_SIEMENS, 0x403e, 0);
if (dev) {
cmd = pci_read_config16(dev, PCI_COMMAND);
cmd |= PCI_COMMAND_MASTER;
pci_write_config16(dev, PCI_COMMAND, cmd);
}
/* Reduce SD-Card speed to DDR50 because of PCB constraints. */
dev = pcidev_path_on_root(PCH_DEVFN_SDCARD);
if (dev) {
uint32_t reg;
struct resource *res = find_resource(dev, PCI_BASE_ADDRESS_0);
if (!res)
return;
write32(res2mmio(res, SD_CAP_BYP, 0), SD_CAP_BYP_EN);
reg = read32(res2mmio(res, SD_CAP_BYP_REG1, 0));
/* Disable HS400 and SDR104, keep SDR50 and DDR50 modes. */
reg &= ~0x20005800;
write32(res2mmio(res, SD_CAP_BYP_REG1, 0), reg);
}
}
static void wait_for_legacy_dev(void *unused)
{
uint32_t legacy_delay, us_since_boot;
struct stopwatch sw;
/* Open main hwinfo block. */
if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS)
return;
/* Get legacy delay parameter from hwinfo. */
if (hwilib_get_field(LegacyDelay, (uint8_t *) &legacy_delay,
sizeof(legacy_delay)) != sizeof(legacy_delay))
return;
us_since_boot = get_us_since_boot();
/* No need to wait if the time since boot is already long enough.*/
if (us_since_boot > legacy_delay)
return;
stopwatch_init_msecs_expire(&sw, (legacy_delay - us_since_boot) / 1000);
printk(BIOS_NOTICE, "Wait remaining %d of %d us for legacy devices...",
legacy_delay - us_since_boot, legacy_delay);
stopwatch_wait_until_expired(&sw);
printk(BIOS_NOTICE, "done!\n");
}
BOOT_STATE_INIT_ENTRY(BS_DEV_ENUMERATE, BS_ON_ENTRY, wait_for_legacy_dev, NULL);
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