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Diffstat (limited to 'src/mainboard/google/falco/gma.c')
| -rw-r--r-- | src/mainboard/google/falco/gma.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/src/mainboard/google/falco/gma.c b/src/mainboard/google/falco/gma.c new file mode 100644 index 0000000000..f3316f4a47 --- /dev/null +++ b/src/mainboard/google/falco/gma.c @@ -0,0 +1,389 @@ +/* + * 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 <types.h> +#include <string.h> +#include <stdlib.h> +#include <device/device.h> +#include <device/device.h> +#include <device/pci_def.h> +#include <device/pci_ops.h> +#include <console/console.h> +#include <delay.h> +#include <pc80/mc146818rtc.h> +#include <arch/acpi.h> +#include <arch/io.h> +#include <arch/interrupt.h> +#include <boot/coreboot_tables.h> +#include "hda_verb.h" +#include <smbios.h> +#include <device/pci.h> +#include <ec/google/chromeec/ec.h> +#include <cbfs_core.h> + +#include <cpu/x86/tsc.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/mtrr.h> +#include <cpu/x86/msr.h> +#include <edid.h> +#include <drivers/intel/gma/i915.h> +#include "mainboard.h" + +/* + * Here is the rough outline of how we bring up the display: + * 1. Upon power-on Sink generates a hot plug detection pulse thru HPD + * 2. Source determines video mode by reading DPCD receiver capability field + * (DPCD 00000h to 0000Dh) including eDP CP capability register (DPCD + * 0000Dh). + * 3. Sink replies DPCD receiver capability field. + * 4. Source starts EDID read thru I2C-over-AUX. + * 5. Sink replies EDID thru I2C-over-AUX. + * 6. Source determines link configuration, such as MAX_LINK_RATE and + * MAX_LANE_COUNT. Source also determines which type of eDP Authentication + * method to use and writes DPCD link configuration field (DPCD 00100h to + * 0010Ah) including eDP configuration set (DPCD 0010Ah). + * 7. Source starts link training. Sink does clock recovery and equalization. + * 8. Source reads DPCD link status field (DPCD 00200h to 0020Bh). + * 9. Sink replies DPCD link status field. If main link is not stable, Source + * repeats Step 7. + * 10. Source sends MSA (Main Stream Attribute) data. Sink extracts video + * parameters and recovers stream clock. + * 11. Source sends video data. + */ + +/* how many bytes do we need for the framebuffer? + * Well, this gets messy. To get an exact answer, we have + * to ask the panel, but we'd rather zero the memory + * and set up the gtt while the panel powers up. So, + * we take a reasonable guess, secure in the knowledge that the + * MRC has to overestimate the number of bytes used. + * 8 MiB is a very safe guess. There may be a better way later, but + * fact is, the initial framebuffer is only very temporary. And taking + * a little long is ok; this is done much faster than the AUX + * channel is ready for IO. + */ +#define FRAME_BUFFER_BYTES (8*MiB) +/* how many 4096-byte pages do we need for the framebuffer? + * There are hard ways to get this, and easy ways: + * there are FRAME_BUFFER_BYTES/4096 pages, since pages are 4096 + * on this chip (and in fact every Intel graphics chip we've seen). + */ +#define FRAME_BUFFER_PAGES (FRAME_BUFFER_BYTES/(4096)) + +static unsigned int *mmio; +static unsigned int graphics; +static unsigned int physbase; + +void ug1(int); +void ug2(int); +void ug22(int); +void ug3(int); + +/* GTT is the Global Translation Table for the graphics pipeline. + * It is used to translate graphics addresses to physical + * memory addresses. As in the CPU, GTTs map 4K pages. + * The setgtt function adds a further bit of flexibility: + * it allows you to set a range (the first two parameters) to point + * to a physical address (third parameter);the physical address is + * incremented by a count (fourth parameter) for each GTT in the + * range. + * Why do it this way? For ultrafast startup, + * we can point all the GTT entries to point to one page, + * and set that page to 0s: + * memset(physbase, 0, 4096); + * setgtt(0, 4250, physbase, 0); + * this takes about 2 ms, and is a win because zeroing + * the page takes a up to 200 ms. + * This call sets the GTT to point to a linear range of pages + * starting at physbase. + */ + +#define GTT_PTE_BASE (2 << 20) + +static void +setgtt(int start, int end, unsigned long base, int inc) +{ + int i; + + for(i = start; i < end; i++){ + u32 word = base + i*inc; + /* note: we've confirmed by checking + * the values that mrc does no + * useful setup before we run this. + */ + gtt_write(GTT_PTE_BASE + i * 4, word|1); + gtt_read(GTT_PTE_BASE + i * 4); + } +} + +static int i915_init_done = 0; + +/* fill the palette. */ +static void palette(void) +{ + int i; + unsigned long color = 0; + + for(i = 0; i < 256; i++, color += 0x010101){ + gtt_write(_LGC_PALETTE_A + (i<<2),color); + } +} + +void dp_init_dim_regs(struct intel_dp *dp); +void dp_init_dim_regs(struct intel_dp *dp) +{ + struct edid *edid = &(dp->edid); + + dp->bytes_per_pixel = edid->framebuffer_bits_per_pixel / 8; + + dp->stride = edid->bytes_per_line; + + dp->htotal = (edid->ha - 1) | ((edid->ha + edid->hbl - 1) << 16); + + dp->hblank = (edid->ha - 1) | ((edid->ha + edid->hbl - 1) << 16); + + dp->hsync = (edid->ha + edid->hso - 1) | + ((edid->ha + edid->hso + edid->hspw - 1) << 16); + + dp->vtotal = (edid->va - 1) | ((edid->va + edid->vbl - 1) << 16); + + dp->vblank = (edid->va - 1) | ((edid->va + edid->vbl - 1) << 16); + + dp->vsync = (edid->va + edid->vso - 1) | + ((edid->va + edid->vso + edid->vspw - 1) << 16); + + /* PIPEASRC is wid-1 x ht-1 */ + dp->pipesrc = (edid->ha-1)<<16 | (edid->va-1); + + dp->pfa_pos = 0; + + dp->pfa_ctl = 0x80800000; + + dp->pfa_sz = (edid->ha << 16) | (edid->va); + + dp->flags = intel_ddi_calc_transcoder_flags(3 * 6, /* bits per color is 6 */ + dp->port, + dp->pipe, + dp->type, + dp->lane_count, + dp->pfa_sz, + dp->edid.phsync == '+'?1:0, + dp->edid.pvsync == '+'?1:0); + + dp->transcoder = intel_ddi_get_transcoder(dp->port, + dp->pipe); + + intel_dp_compute_m_n(dp->pipe_bits_per_pixel, + dp->lane_count, + dp->edid.pixel_clock, + dp->edid.link_clock, + &dp->m_n); + + printk(BIOS_SPEW, "dp->stride = 0x%08x\n",dp->stride); + printk(BIOS_SPEW, "dp->htotal = 0x%08x\n", dp->htotal); + printk(BIOS_SPEW, "dp->hblank = 0x%08x\n", dp->hblank); + printk(BIOS_SPEW, "dp->hsync = 0x%08x\n", dp->hsync); + printk(BIOS_SPEW, "dp->vtotal = 0x%08x\n", dp->vtotal); + printk(BIOS_SPEW, "dp->vblank = 0x%08x\n", dp->vblank); + printk(BIOS_SPEW, "dp->vsync = 0x%08x\n", dp->vsync); + printk(BIOS_SPEW, "dp->pipesrc = 0x%08x\n", dp->pipesrc); + printk(BIOS_SPEW, "dp->pfa_pos = 0x%08x\n", dp->pfa_pos); + printk(BIOS_SPEW, "dp->pfa_ctl = 0x%08x\n", dp->pfa_ctl); + printk(BIOS_SPEW, "dp->pfa_sz = 0x%08x\n", dp->pfa_sz); + printk(BIOS_SPEW, "dp->link_m = 0x%08x\n", dp->m_n.link_m); + printk(BIOS_SPEW, "dp->link_n = 0x%08x\n", dp->m_n.link_n); + printk(BIOS_SPEW, "0x6f030 = 0x%08x\n", TU_SIZE(dp->m_n.tu) | dp->m_n.gmch_m); + printk(BIOS_SPEW, "0x6f030 = 0x%08x\n", dp->m_n.gmch_m); + printk(BIOS_SPEW, "0x6f034 = 0x%08x\n", dp->m_n.gmch_n); + printk(BIOS_SPEW, "dp->flags = 0x%08x\n", dp->flags); +} + +void mainboard_train_link(struct intel_dp *intel_dp) +{ + u8 read_val; + u8 link_status[DP_LINK_STATUS_SIZE]; + + gtt_write(DP_TP_CTL(intel_dp->port),DP_TP_CTL_ENABLE | DP_TP_CTL_ENHANCED_FRAME_ENABLE); + gtt_write(DP_A, DP_PORT_EN | DP_LINK_TRAIN_PAT_1 | DP_LINK_TRAIN_PAT_1_CPT | DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0 | DP_PORT_WIDTH_1 | DP_PLL_FREQ_270MHZ | DP_SYNC_VS_HIGH |0x80000011); + + intel_dp_get_training_pattern(intel_dp, &read_val); + intel_dp_set_training_pattern(intel_dp, DP_TRAINING_PATTERN_1 | DP_LINK_QUAL_PATTERN_DISABLE | DP_SYMBOL_ERROR_COUNT_BOTH); + intel_dp_get_lane_count(intel_dp, &read_val); + intel_dp_set_training_lane0(intel_dp, DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0); + intel_dp_get_link_status(intel_dp, link_status); + + gtt_write(DP_TP_CTL(intel_dp->port),DP_TP_CTL_ENABLE | DP_TP_CTL_ENHANCED_FRAME_ENABLE | DP_TP_CTL_LINK_TRAIN_PAT2); + + intel_dp_get_training_pattern(intel_dp, &read_val); + intel_dp_set_training_pattern(intel_dp, DP_TRAINING_PATTERN_2 | DP_LINK_QUAL_PATTERN_DISABLE | DP_SYMBOL_ERROR_COUNT_BOTH); + intel_dp_get_link_status(intel_dp, link_status); + intel_dp_get_lane_align_status(intel_dp, &read_val); + intel_dp_get_training_pattern(intel_dp, &read_val); + intel_dp_set_training_pattern(intel_dp, DP_TRAINING_PATTERN_DISABLE | DP_LINK_QUAL_PATTERN_DISABLE | DP_SYMBOL_ERROR_COUNT_BOTH); +} + +#define TEST_GFX 0 + +#if TEST_GFX +static void test_gfx(struct intel_dp *dp) +{ + int i; + + /* This is a sanity test code which fills the screen with two bands -- + green and blue. It is very useful to ensure all the initializations + are made right. Thus, to be used only for testing, not otherwise + */ + for (i = 0; i < (dp->edid.va - 4); i++) { + u32 *l; + int j; + u32 tcolor = 0x0ff; + for (j = 0; j < (dp->edid.ha-4); j++) { + if (j == (dp->edid.ha/2)) { + tcolor = 0xff00; + } + l = (u32*)(graphics + i * dp->stride + j * sizeof(tcolor)); + memcpy(l,&tcolor,sizeof(tcolor)); + } + } +} +#else +static void test_gfx(struct intel_dp *dp) {} +#endif + + +void mainboard_set_port_clk_dp(struct intel_dp *intel_dp) +{ + u32 ddi_pll_sel = 0; + + switch (intel_dp->link_bw) { + case DP_LINK_BW_1_62: + ddi_pll_sel = PORT_CLK_SEL_LCPLL_810; + break; + case DP_LINK_BW_2_7: + ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350; + break; + case DP_LINK_BW_5_4: + ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700; + break; + default: + printk(BIOS_ERR, "invalid link bw %d\n", intel_dp->link_bw); + return; + } + + gtt_write(PORT_CLK_SEL(intel_dp->port), ddi_pll_sel); +} + +int i915lightup(unsigned int pphysbase, unsigned int pmmio, + unsigned int pgfx, unsigned int init_fb) +{ + int must_cycle_power = 0; + struct intel_dp adp, *dp = &adp; + int i; + int edid_ok; + int pixels = FRAME_BUFFER_BYTES/64; + + mmio = (void *)pmmio; + physbase = pphysbase; + graphics = pgfx; + printk(BIOS_SPEW, + "i915lightup: graphics %p mmio %p" + "physbase %08x\n", + (void *)graphics, mmio, physbase); + + void runio(struct intel_dp *dp); + void runlinux(struct intel_dp *dp); + dp->gen = 8; // This is gen 8 which we believe is Haswell + dp->is_haswell = 1; + dp->DP = 0x2; + /* These values are used for training the link */ + dp->lane_count = 2; + dp->link_bw = DP_LINK_BW_2_7; + dp->panel_power_down_delay = 600; + dp->panel_power_up_delay = 200; + dp->panel_power_cycle_delay = 600; + dp->pipe = PIPE_A; + dp->port = PORT_A; + dp->plane = PLANE_A; + dp->clock = 160000; + dp->pipe_bits_per_pixel = 32; + dp->type = INTEL_OUTPUT_EDP; + dp->output_reg = DP_A; + /* observed from YABEL. */ + dp->aux_clock_divider = 0xe1; + dp->precharge = 3; + + /* 1. Normal mode: Set the first page to zero and make + all GTT entries point to the same page + 2. Developer/Recovery mode: We do not zero out all + the pages pointed to by GTT in order to avoid wasting time */ + if (init_fb) + setgtt(0, FRAME_BUFFER_PAGES, physbase, 4096); + else { + setgtt(0, FRAME_BUFFER_PAGES, physbase, 0); + memset((void*)graphics, 0, 4096); + } + + dp->address = 0x50; + + if ( !intel_dp_get_dpcd(dp) ) + goto fail; + + intel_dp_i2c_aux_ch(dp, MODE_I2C_WRITE, 0, NULL); + for(dp->edidlen = i = 0; i < sizeof(dp->rawedid); i++){ + if (intel_dp_i2c_aux_ch(dp, MODE_I2C_READ, + 0x50, &dp->rawedid[i]) < 0) + break; + dp->edidlen++; + } + + edid_ok = decode_edid(dp->rawedid, dp->edidlen, &dp->edid); + printk(BIOS_SPEW, "decode edid returns %d\n", edid_ok); + + dp->edid.link_clock = intel_dp_bw_code_to_link_rate(dp->link_bw); + + printk(BIOS_SPEW, "pixel_clock is %i, link_clock is %i\n",dp->edid.pixel_clock, dp->edid.link_clock); + + dp_init_dim_regs(dp); + + intel_ddi_set_pipe_settings(dp); + + runio(dp); + + palette(); + + pixels = dp->edid.ha * (dp->edid.va-4) * 4; + printk(BIOS_SPEW, "ha=%d, va=%d\n",dp->edid.ha, dp->edid.va); + + test_gfx(dp); + + set_vbe_mode_info_valid(&dp->edid, graphics); + i915_init_done = 1; + return i915_init_done; + +fail: + printk(BIOS_SPEW, "Graphics could not be started;"); + if (0 && must_cycle_power){ + printk(BIOS_SPEW, "Turn off power and wait ..."); + gtt_write(PCH_PP_CONTROL,0xabcd0000); + udelay(600000); + gtt_write(PCH_PP_CONTROL,0xabcd000f); + } + printk(BIOS_SPEW, "Returning.\n"); + return 0; +} |