| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/cache.h> |
| #include <console/console.h> |
| #include <device/mmio.h> |
| #include <device/device.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <soc/dp.h> |
| #include <soc/fimd.h> |
| #include <soc/cpu.h> |
| #include <soc/clk.h> |
| #include <string.h> |
| |
| #include "chip.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(struct device *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 inadvertently. |
| */ |
| uint32_t lower = ALIGN_DOWN(lcdbase, MiB); |
| uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB); |
| |
| dcache_clean_invalidate_by_mva((void *)lower, upper - lower); |
| mmu_config_range(lower / MiB, (upper - lower) / MiB, DCACHE_OFF); |
| } |
| |
| 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(struct device *dev) |
| { |
| unsigned long fb_size = FB_SIZE_KB * KiB; |
| u32 lcdbase = get_fb_base_kb() * 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_read_resources(struct device *dev) |
| { |
| unsigned long fb_size = FB_SIZE_KB * KiB; |
| u32 lcdbase = get_fb_base_kb() * KiB; |
| |
| ram_range(dev, 0, RAM_BASE_KB * KiB, (RAM_SIZE_KB - FB_SIZE_KB) * KiB); |
| mmio_range(dev, 1, lcdbase, fb_size); |
| } |
| |
| static void cpu_init(struct device *dev) |
| { |
| printk(BIOS_INFO, "CPU: S5P%X @ %ldMHz\n", |
| cpu_id, get_arm_clk() / 1000000); |
| } |
| |
| static struct device_operations cpu_ops = { |
| .read_resources = cpu_read_resources, |
| .set_resources = noop_set_resources, |
| .enable_resources = cpu_enable, |
| .init = cpu_init, |
| }; |
| |
| static void enable_exynos5420_dev(struct device *dev) |
| { |
| dev->ops = &cpu_ops; |
| } |
| |
| struct chip_operations soc_samsung_exynos5420_ops = { |
| CHIP_NAME("SOC Samsung Exynos 5420") |
| .enable_dev = enable_exynos5420_dev, |
| }; |