diff options
Diffstat (limited to 'src/mainboard/intel/wtm2/i915.c')
| -rw-r--r-- | src/mainboard/intel/wtm2/i915.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/src/mainboard/intel/wtm2/i915.c b/src/mainboard/intel/wtm2/i915.c deleted file mode 100644 index 72273f8333..0000000000 --- a/src/mainboard/intel/wtm2/i915.c +++ /dev/null @@ -1,228 +0,0 @@ -/* - * 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. - */ - -#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 <smbios.h> -#include <device/pci.h> -#include <ec/google/chromeec/ec.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> - -/* 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 int verbose = 0; - -static unsigned int *mmio; -static unsigned int graphics; -static unsigned short addrport; -static unsigned short dataport; -static unsigned int physbase; - -const u32 link_edid_data[] = { - 0xffffff00, 0x00ffffff, 0x0379e430, 0x00000000, - 0x04011500, 0x96121ba5, 0xa2d54f02, 0x26935259, - 0x00545017, 0x01010000, 0x01010101, 0x01010101, - 0x01010101, 0x6f6d0101, 0xa4a0a000, 0x20306031, - 0xb510003a, 0x19000010, 0x00000000, 0x00000000, - 0x00000000, 0x00000000, 0x00000000, 0x4c00fe00, - 0x69442047, 0x616c7073, 0x20200a79, 0xfe000000, - 0x31504c00, 0x45513932, 0x50532d31, 0x24003141, -}; - -static int ioread = 0, iowrite = 0; - -static char *regname(unsigned long addr) -{ - static char name[16]; - snprintf(name, sizeof(name), "0x%lx", addr); - return name; -} - -unsigned long io_i915_read32(unsigned long addr) -{ - unsigned long val; - outl(addr, addrport); - val = inl(dataport); - ioread += 2; - if (verbose & vio)printk(BIOS_SPEW, "%s: Got %08lx\n", regname(addr), val); - return val; -} - -void io_i915_write32(unsigned long val, unsigned long addr) -{ - if (verbose & vio)printk(BIOS_SPEW, "%s: outl %08lx\n", regname(addr), val); - outl(addr, addrport); - outl(val, dataport); - iowrite += 2; -} - -/* 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. - */ - -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; - io_i915_write32(word|1,(i*4)|1); - } -} - -static unsigned long tickspermicrosecond = 1795; -static unsigned long long globalstart; - -static unsigned long -microseconds(unsigned long long start, unsigned long long end) -{ - unsigned long ret; - ret = ((end - start)/tickspermicrosecond); - return ret; -} - -static unsigned long globalmicroseconds(void) -{ - return microseconds(globalstart, rdtscll()); -} - -static int i915_init_done = 0; - -int i915lightup(unsigned int physbase, unsigned int iobase, unsigned int mmio, - unsigned int gfx); - -int i915lightup(unsigned int pphysbase, unsigned int piobase, - unsigned int pmmio, unsigned int pgfx) -{ - int must_cycle_power = 0; - - /* frame buffer pointer */ - u32 *l; - int i; - unsigned long before_gtt, after_gtt; - - mmio = (void *)pmmio; - addrport = piobase; - dataport = addrport + 4; - physbase = pphysbase; - graphics = pgfx; - printk(BIOS_SPEW, - "i915lightup: graphics %p mmio %p" - "addrport %04x physbase %08x\n", - (void *)graphics, mmio, addrport, physbase); - globalstart = rdtscll(); - - /* turn it on. The VBIOS does it this way, so we hope that's ok. */ - verbose = 0; - io_i915_write32(0xabcd000f, PCH_PP_CONTROL); - - /* the AUX channel needs a small amount of time to spin up. - * Rather than udelay, do some useful work: - * Zero out the frame buffer memory, - * and set the global translation table (GTT) - */ - printk(BIOS_SPEW, "Set not-White (%08x) for %d pixels\n", 0xffffff, - FRAME_BUFFER_BYTES/sizeof(u32)); - for(l = (u32 *)graphics, i = 0; - i < FRAME_BUFFER_BYTES/sizeof(u32); i++){ - l[i] = 0x1122ff; - } - printk(BIOS_SPEW, "GTT: set %d pages starting at %p\n", - FRAME_BUFFER_PAGES, (void *)physbase); - before_gtt = globalmicroseconds(); - setgtt(0, FRAME_BUFFER_PAGES, physbase, 4096); - after_gtt = globalmicroseconds(); - - /* The reset is basically harmless, and can be - * repeated by the VBIOS in any event. - */ - - graphics_register_reset(DPA_AUX_CH_CTL, DPA_AUX_CH_DATA1, verbose); - - /* failures after this point can return without - * powering off the panel. - */ - - if (1) - goto fail; - /* failures after this point MUST power off the panel - * and wait 600 ms. - */ - - i915_init_done = 1; - return i915_init_done; - -fail: - printk(BIOS_SPEW, "Graphics could not be started;"); - if (must_cycle_power){ - printk(BIOS_SPEW, "Turn off power and wait ..."); - io_i915_write32(0xabcd0000, PCH_PP_CONTROL); - udelay(600000); - } - printk(BIOS_SPEW, "Returning.\n"); - return 0; - -} |