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/*
* This file is part of the coreboot project.
*
* Copyright 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 <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 "fimd.h"
#include "dp-core.h"
#include "cpu.h"
#include "clk.h"
#include "chip.h"
#define RAM_BASE_KB (CONFIG_SYS_SDRAM_BASE >> 10)
#define RAM_SIZE_KB (CONFIG_DRAM_SIZE_MB << 10UL)
static unsigned int cpu_id;
static unsigned int cpu_rev;
static void set_cpu_id(void)
{
cpu_id = readl((void *)EXYNOS_PRO_ID);
cpu_id = (0xC000 | ((cpu_id & 0x00FFF000) >> 12));
/*
* 0xC200: EXYNOS4210 EVT0
* 0xC210: EXYNOS4210 EVT1
*/
if (cpu_id == 0xC200) {
cpu_id |= 0x10;
cpu_rev = 0;
} else if (cpu_id == 0xC210) {
cpu_rev = 1;
}
}
/* 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)
{
int ret;
struct cpu_samsung_exynos5250_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;
unsigned long int fb_size;
u32 lcdbase;
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;
/* The size is a magic number from hardware. */
fb_size = conf->xres * conf->yres * (conf->bpp / 8);
lcdbase = (uintptr_t)cbmem_add(CBMEM_ID_CONSOLE, fb_size);
printk(BIOS_SPEW, "LCD framebuffer base is %p\n", (void *)(lcdbase));
/*
* 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.
*
* FIXME: Is disabling/re-enabling the MMU entirely necessary?
*/
uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
dcache_clean_invalidate_by_mva(lower, upper - lower);
dcache_mmu_disable();
mmu_config_range(lower/MiB, (upper - lower)/MiB, DCACHE_OFF);
dcache_mmu_enable();
mmio_resource(dev, 1, lcdbase/KiB, (fb_size + KiB - 1)/KiB);
printk(BIOS_DEBUG,
"Initializing Exynos VGA, base %p\n", (void *)lcdbase);
memset((void *)lcdbase, 0, fb_size); /* clear the framebuffer */
ret = lcd_ctrl_init(fb_size, &panel, (void *)lcdbase);
}
static void cpu_init(device_t dev)
{
exynos_displayport_init(dev);
ram_resource(dev, 0, RAM_BASE_KB, RAM_SIZE_KB);
set_cpu_id();
printk(BIOS_INFO, "CPU: S5P%X @ %ldMHz\n",
cpu_id, get_arm_clk() / (1024*1024));
}
static void cpu_noop(device_t dev)
{
}
static struct device_operations cpu_ops = {
.read_resources = cpu_noop,
.set_resources = cpu_noop,
.enable_resources = cpu_init,
.init = cpu_noop,
.scan_bus = 0,
};
static void enable_exynos5250_dev(device_t dev)
{
dev->ops = &cpu_ops;
}
struct chip_operations cpu_samsung_exynos5250_ops = {
CHIP_NAME("CPU Samsung Exynos 5250")
.enable_dev = enable_exynos5250_dev,
};
void exynos5250_config_l2_cache(void)
{
uint32_t val;
/*
* Bit 9 - L2 tag RAM setup (1 cycle)
* Bits 8:6 - L2 tag RAM latency (3 cycles)
* Bit 5 - L2 data RAM setup (1 cycle)
* Bits 2:0 - L2 data RAM latency (3 cycles)
*/
val = (1 << 9) | (0x2 << 6) | (1 << 5) | (0x2);
write_l2ctlr(val);
}
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