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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <cbmem.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <reg_script.h>
#include <baytrail/iosf.h>
#include <baytrail/nvs.h>
#include <baytrail/ramstage.h>
static const struct reg_script scc_start_dll[] = {
/* Configure master DLL. */
REG_IOSF_WRITE(IOSF_PORT_SCORE, 0x4964, 0x00078000),
/* Configure Swing,FSM for Master DLL */
REG_IOSF_WRITE(IOSF_PORT_SCORE, 0x4970, 0x00000133),
/* Run+Local Reset on Master DLL */
REG_IOSF_WRITE(IOSF_PORT_SCORE, 0x4970, 0x00001933),
REG_SCRIPT_END,
};
static const struct reg_script scc_after_dll[] = {
/* Configure Write Path */
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x4954, ~0x7fff, 0x35ad),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x4958, ~0x7fff, 0x35ad),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x495c, ~0x7fff, 0x35ad),
/* Configure Read Path */
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x43e4, ~0x7fff, 0x35ad),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x4324, ~0x7fff, 0x35ad),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x42b4, ~0x7fff, 0x35ad),
/* eMMC 4.5 TX and RX DLL */
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49a4, ~0x1f001f, 0xa000d),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49a8, ~0x1f001f, 0xd000d),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49ac, ~0x1f001f, 0xd000d),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49b0, ~0x1f001f, 0xd000d),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49b4, ~0x1f001f, 0xd000d),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x49b8, ~0x1, 0x0),
/* cfio_regs_mmc1_ELECTRICAL.nslew/pslew */
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c0, ~0x3c, 0x0),
REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c4, ~0x3c, 0x0),
/*
* iosf2ocp_private.GENREGRW1.cr_clock_enable_clk_ocp = 01
* iosf2ocp_private.GENREGRW1.cr_clock_enable_clk_xin = 01
*/
REG_IOSF_RMW(IOSF_PORT_SCC, 0x600, ~0xf, 0x5),
/* Enable IOSF Snoop */
REG_IOSF_OR(IOSF_PORT_SCC, 0x00, (1 << 7)),
/* SDIO 3V Support. */
REG_IOSF_RMW(IOSF_PORT_SCC, 0x600, ~0x30, 0x30),
REG_SCRIPT_END,
};
void baytrail_init_scc(void)
{
uint32_t dll_values;
printk(BIOS_DEBUG, "Initializing sideband SCC registers.\n");
/* Common Sideband Initialization for SCC */
reg_script_run(scc_start_dll);
/* Override Slave Path - populate DLL settings. */
dll_values = iosf_score_read(0x496c) & 0x7ffff;
dll_values |= iosf_score_read(0x4950) & ~0xfffff;
iosf_score_write(0x4950, dll_values | (1 << 19));
reg_script_run(scc_after_dll);
}
void scc_enable_acpi_mode(device_t dev, int iosf_reg, int nvs_index)
{
struct reg_script ops[] = {
REG_SCRIPT_SET_DEV(dev),
/* Disable PCI interrupt, enable Memory and Bus Master */
REG_PCI_OR32(PCI_COMMAND,
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | (1<<10)),
/* Enable ACPI mode */
REG_IOSF_OR(IOSF_PORT_SCC, iosf_reg,
SCC_CTL_PCI_CFG_DIS | SCC_CTL_ACPI_INT_EN),
REG_SCRIPT_END
};
struct resource *bar;
global_nvs_t *gnvs;
/* Find ACPI NVS to update BARs */
gnvs = (global_nvs_t *)cbmem_find(CBMEM_ID_ACPI_GNVS);
if (!gnvs) {
printk(BIOS_ERR, "Unable to locate Global NVS\n");
return;
}
/* Save BAR0 and BAR1 to ACPI NVS */
bar = find_resource(dev, PCI_BASE_ADDRESS_0);
if (bar)
gnvs->dev.scc_bar0[nvs_index] = (u32)bar->base;
bar = find_resource(dev, PCI_BASE_ADDRESS_1);
if (bar)
gnvs->dev.scc_bar1[nvs_index] = (u32)bar->base;
/* Device is enabled in ACPI mode */
gnvs->dev.scc_en[nvs_index] = 1;
/* Put device in ACPI mode */
reg_script_run(ops);
}
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