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/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
* Copyright (C) 2012 Samsung Electronics
*
* 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 <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <delay.h>
#include <console/console.h>
#include <device/device.h>
#include <cbmem.h>
#include <arch/cache.h>
#include "dp.h"
#include "fimd.h"
#include "cpu.h"
#include "clk.h"
#include "chip.h"
#include <ec/google/chromeec/ec.h>
static unsigned int cpu_id;
static unsigned int cpu_rev;
static void set_cpu_id(void)
{
u32 pro_id = (read32((void *)EXYNOS5_PRO_ID) & 0x00FFF000) >> 12;
switch (pro_id) {
case 0x200:
/* Exynos4210 EVT0 */
cpu_id = 0x4210;
cpu_rev = 0;
break;
case 0x210:
/* Exynos4210 EVT1 */
cpu_id = 0x4210;
break;
case 0x412:
/* Exynos4412 */
cpu_id = 0x4412;
break;
case 0x520:
/* Exynos5250 */
cpu_id = 0x5250;
break;
case 0x420:
/* Exynos5420 */
cpu_id = 0x5420;
break;
}
}
/* we distinguish a display port device from a raw graphics device
* because there are dramatic differences in startup depending on
* graphics usage. To make startup fast and easier to understand and
* debug we explicitly name this common case. The alternate approach,
* involving lots of machine and callbacks, is hard to debug and
* verify.
*/
static void exynos_displayport_init(device_t dev, u32 lcdbase,
unsigned long fb_size)
{
struct soc_samsung_exynos5420_config *conf = dev->chip_info;
/* put these on the stack. If, at some point, we want to move
* this code to a pre-ram stage, it will be much easier.
*/
struct exynos5_fimd_panel panel;
memset(&panel, 0, sizeof(panel));
panel.is_dp = 1; /* Display I/F is eDP */
/* while it is true that we did a memset to zero,
* we leave some 'set to zero' entries here to make
* it clear what's going on. Graphics is confusing.
*/
panel.is_mipi = 0;
panel.fixvclk = 0;
panel.ivclk = 0;
panel.clkval_f = conf->clkval_f;
panel.upper_margin = conf->upper_margin;
panel.lower_margin = conf->lower_margin;
panel.vsync = conf->vsync;
panel.left_margin = conf->left_margin;
panel.right_margin = conf->right_margin;
panel.hsync = conf->hsync;
panel.xres = conf->xres;
panel.yres = conf->yres;
printk(BIOS_SPEW, "LCD framebuffer @%p\n", (void *)(lcdbase));
memset((void *)lcdbase, 0, fb_size); /* clear the framebuffer */
/*
* We need to clean and invalidate the framebuffer region and disable
* caching as well. We assume that our dcache <--> memory address
* space is identity-mapped in 1MB chunks, so align accordingly.
*
* Note: We may want to do something clever to ensure the framebuffer
* region is aligned such that we don't change dcache policy for other
* stuff inadvertantly.
*/
uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
dcache_clean_invalidate_by_mva(lower, upper - lower);
mmu_config_range(lower / MiB, (upper - lower) / MiB, DCACHE_OFF);
mmio_resource(dev, 1, lcdbase/KiB, CEIL_DIV(fb_size, KiB));
}
static void tps65090_thru_ec_fet_disable(int index)
{
uint8_t value = 0;
if (google_chromeec_i2c_xfer(0x48, 0xe + index, 1, &value, 1, 0)) {
printk(BIOS_ERR,
"Error sending i2c pass through command to EC.\n");
return;
}
}
static void cpu_enable(device_t dev)
{
unsigned long fb_size = FB_SIZE_KB * KiB;
u32 lcdbase = get_fb_base_kb() * KiB;
ram_resource(dev, 0, RAM_BASE_KB, RAM_SIZE_KB - FB_SIZE_KB);
mmio_resource(dev, 1, lcdbase / KiB, CEIL_DIV(fb_size, KiB));
/*
* Disable LCD FETs before we do anything with the display.
* FIXME(dhendrix): This is a gross hack and should be done
* elsewhere (romstage?).
*/
tps65090_thru_ec_fet_disable(1);
tps65090_thru_ec_fet_disable(6);
exynos_displayport_init(dev, lcdbase, fb_size);
set_cpu_id();
}
static void cpu_init(device_t dev)
{
printk(BIOS_INFO, "CPU: S5P%X @ %ldMHz\n",
cpu_id, get_arm_clk() / 1000000);
}
static void cpu_noop(device_t dev)
{
}
static struct device_operations cpu_ops = {
.read_resources = cpu_noop,
.set_resources = cpu_noop,
.enable_resources = cpu_enable,
.init = cpu_init,
.scan_bus = 0,
};
static void enable_exynos5420_dev(device_t dev)
{
dev->ops = &cpu_ops;
}
struct chip_operations cpu_samsung_exynos5420_ops = {
CHIP_NAME("CPU Samsung Exynos 5420")
.enable_dev = enable_exynos5420_dev,
};
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