| /* |
| * 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. |
| */ |
| vidinfo_t vi; |
| struct exynos5_fimd_panel panel; |
| unsigned long int fb_size; |
| u32 lcdbase; |
| |
| memset(&vi, 0, sizeof(vi)); |
| 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; |
| |
| vi.vl_col = conf->xres; |
| vi.vl_row = conf->yres; |
| vi.vl_bpix = conf->bpp; |
| /* |
| * The size is a magic number from hardware. Allocate enough for the |
| * frame buffer and color map. |
| */ |
| fb_size = conf->xres * conf->yres * (conf->bpp / 8); |
| lcdbase = (uintptr_t)cbmem_add(CBMEM_ID_CONSOLE, fb_size + 64*KiB); |
| printk(BIOS_SPEW, "LCD colormap base is %p\n", (void *)(lcdbase)); |
| mmio_resource(dev, 0, lcdbase/KiB, 64); |
| vi.cmap = (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 + 64*KiB, 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(); |
| |
| lcdbase += 64*KiB; |
| 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(&vi, &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); |
| } |