Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright 2013 Google Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <types.h> |
| 21 | #include <string.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <device/device.h> |
| 24 | #include <device/device.h> |
| 25 | #include <device/pci_def.h> |
| 26 | #include <device/pci_ops.h> |
| 27 | #include <console/console.h> |
| 28 | #include <delay.h> |
| 29 | #include <pc80/mc146818rtc.h> |
| 30 | #include <arch/acpi.h> |
| 31 | #include <arch/io.h> |
| 32 | #include <arch/interrupt.h> |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 33 | #include <boot/coreboot_tables.h> |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 34 | #include <smbios.h> |
| 35 | #include <device/pci.h> |
| 36 | #include <ec/google/chromeec/ec.h> |
| 37 | #include <cbfs_core.h> |
| 38 | |
| 39 | #include <cpu/x86/tsc.h> |
| 40 | #include <cpu/x86/cache.h> |
| 41 | #include <cpu/x86/mtrr.h> |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 42 | #include <cpu/x86/msr.h> |
| 43 | #include <edid.h> |
Ronald G. Minnich | 78c3e33 | 2013-04-24 09:50:56 -0700 | [diff] [blame] | 44 | #include <device/i915.h> |
| 45 | |
| 46 | /* how many bytes do we need for the framebuffer? |
| 47 | * Well, this gets messy. To get an exact answer, we have |
| 48 | * to ask the panel, but we'd rather zero the memory |
| 49 | * and set up the gtt while the panel powers up. So, |
| 50 | * we take a reasonable guess, secure in the knowledge that the |
| 51 | * MRC has to overestimate the number of bytes used. |
| 52 | * 8 MiB is a very safe guess. There may be a better way later, but |
| 53 | * fact is, the initial framebuffer is only very temporary. And taking |
| 54 | * a little long is ok; this is done much faster than the AUX |
| 55 | * channel is ready for IO. |
| 56 | */ |
| 57 | #define FRAME_BUFFER_BYTES (8*MiB) |
| 58 | /* how many 4096-byte pages do we need for the framebuffer? |
| 59 | * There are hard ways to get this, and easy ways: |
| 60 | * there are FRAME_BUFFER_BYTES/4096 pages, since pages are 4096 |
| 61 | * on this chip (and in fact every Intel graphics chip we've seen). |
| 62 | */ |
| 63 | #define FRAME_BUFFER_PAGES (FRAME_BUFFER_BYTES/(4096)) |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 64 | |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 65 | static int verbose = 0; |
| 66 | |
| 67 | static unsigned int *mmio; |
| 68 | static unsigned int graphics; |
| 69 | static unsigned short addrport; |
| 70 | static unsigned short dataport; |
| 71 | static unsigned int physbase; |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 72 | |
| 73 | const u32 link_edid_data[] = { |
| 74 | 0xffffff00, 0x00ffffff, 0x0379e430, 0x00000000, |
| 75 | 0x04011500, 0x96121ba5, 0xa2d54f02, 0x26935259, |
| 76 | 0x00545017, 0x01010000, 0x01010101, 0x01010101, |
| 77 | 0x01010101, 0x6f6d0101, 0xa4a0a000, 0x20306031, |
| 78 | 0xb510003a, 0x19000010, 0x00000000, 0x00000000, |
| 79 | 0x00000000, 0x00000000, 0x00000000, 0x4c00fe00, |
| 80 | 0x69442047, 0x616c7073, 0x20200a79, 0xfe000000, |
| 81 | 0x31504c00, 0x45513932, 0x50532d31, 0x24003141, |
| 82 | }; |
| 83 | |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 84 | static int ioread = 0, iowrite = 0; |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 85 | |
| 86 | static char *regname(unsigned long addr) |
| 87 | { |
| 88 | static char name[16]; |
Vladimir Serbinenko | a37383d | 2013-11-26 02:41:26 +0100 | [diff] [blame] | 89 | snprintf(name, sizeof (name), "0x%lx", addr); |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 90 | return name; |
| 91 | } |
| 92 | |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 93 | unsigned long io_i915_read32(unsigned long addr) |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 94 | { |
| 95 | unsigned long val; |
| 96 | outl(addr, addrport); |
| 97 | val = inl(dataport); |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 98 | ioread += 2; |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 99 | if (verbose & vio)printk(BIOS_SPEW, "%s: Got %08lx\n", regname(addr), val); |
| 100 | return val; |
| 101 | } |
| 102 | |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 103 | void io_i915_write32(unsigned long val, unsigned long addr) |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 104 | { |
| 105 | if (verbose & vio)printk(BIOS_SPEW, "%s: outl %08lx\n", regname(addr), val); |
| 106 | outl(addr, addrport); |
| 107 | outl(val, dataport); |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 108 | iowrite += 2; |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 109 | } |
| 110 | |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 111 | /* GTT is the Global Translation Table for the graphics pipeline. |
| 112 | * It is used to translate graphics addresses to physical |
| 113 | * memory addresses. As in the CPU, GTTs map 4K pages. |
| 114 | * The setgtt function adds a further bit of flexibility: |
| 115 | * it allows you to set a range (the first two parameters) to point |
| 116 | * to a physical address (third parameter);the physical address is |
| 117 | * incremented by a count (fourth parameter) for each GTT in the |
| 118 | * range. |
| 119 | * Why do it this way? For ultrafast startup, |
| 120 | * we can point all the GTT entries to point to one page, |
| 121 | * and set that page to 0s: |
| 122 | * memset(physbase, 0, 4096); |
| 123 | * setgtt(0, 4250, physbase, 0); |
| 124 | * this takes about 2 ms, and is a win because zeroing |
| 125 | * the page takes a up to 200 ms. |
| 126 | * This call sets the GTT to point to a linear range of pages |
| 127 | * starting at physbase. |
| 128 | */ |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 129 | |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 130 | static void |
| 131 | setgtt(int start, int end, unsigned long base, int inc) |
| 132 | { |
| 133 | int i; |
| 134 | |
| 135 | for(i = start; i < end; i++){ |
| 136 | u32 word = base + i*inc; |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 137 | io_i915_write32(word|1,(i*4)|1); |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 138 | } |
| 139 | } |
| 140 | |
| 141 | static unsigned long tickspermicrosecond = 1795; |
| 142 | static unsigned long long globalstart; |
| 143 | |
| 144 | static unsigned long |
| 145 | microseconds(unsigned long long start, unsigned long long end) |
| 146 | { |
| 147 | unsigned long ret; |
| 148 | ret = ((end - start)/tickspermicrosecond); |
| 149 | return ret; |
| 150 | } |
| 151 | |
| 152 | static unsigned long globalmicroseconds(void) |
| 153 | { |
| 154 | return microseconds(globalstart, rdtscll()); |
| 155 | } |
| 156 | |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 157 | static int i915_init_done = 0; |
| 158 | |
Ronald G. Minnich | b2893a01 | 2013-04-23 10:59:11 -0700 | [diff] [blame] | 159 | int i915lightup(unsigned int physbase, unsigned int iobase, unsigned int mmio, |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 160 | unsigned int gfx); |
| 161 | |
| 162 | int i915lightup(unsigned int pphysbase, unsigned int piobase, |
| 163 | unsigned int pmmio, unsigned int pgfx) |
| 164 | { |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 165 | int must_cycle_power = 0; |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 166 | |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 167 | /* frame buffer pointer */ |
| 168 | u32 *l; |
| 169 | int i; |
| 170 | unsigned long before_gtt, after_gtt; |
| 171 | |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 172 | mmio = (void *)pmmio; |
| 173 | addrport = piobase; |
| 174 | dataport = addrport + 4; |
| 175 | physbase = pphysbase; |
| 176 | graphics = pgfx; |
| 177 | printk(BIOS_SPEW, |
| 178 | "i915lightup: graphics %p mmio %p" |
| 179 | "addrport %04x physbase %08x\n", |
| 180 | (void *)graphics, mmio, addrport, physbase); |
| 181 | globalstart = rdtscll(); |
| 182 | |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 183 | /* turn it on. The VBIOS does it this way, so we hope that's ok. */ |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 184 | verbose = 0; |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 185 | io_i915_write32(0xabcd000f, PCH_PP_CONTROL); |
| 186 | |
| 187 | /* the AUX channel needs a small amount of time to spin up. |
| 188 | * Rather than udelay, do some useful work: |
| 189 | * Zero out the frame buffer memory, |
| 190 | * and set the global translation table (GTT) |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 191 | */ |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 192 | printk(BIOS_SPEW, "Set not-White (%08x) for %d pixels\n", 0xffffff, |
| 193 | FRAME_BUFFER_BYTES/sizeof(u32)); |
| 194 | for(l = (u32 *)graphics, i = 0; |
| 195 | i < FRAME_BUFFER_BYTES/sizeof(u32); i++){ |
| 196 | l[i] = 0x1122ff; |
| 197 | } |
| 198 | printk(BIOS_SPEW, "GTT: set %d pages starting at %p\n", |
| 199 | FRAME_BUFFER_PAGES, (void *)physbase); |
| 200 | before_gtt = globalmicroseconds(); |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 201 | setgtt(0, FRAME_BUFFER_PAGES, physbase, 4096); |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 202 | after_gtt = globalmicroseconds(); |
| 203 | |
| 204 | /* The reset is basically harmless, and can be |
| 205 | * repeated by the VBIOS in any event. |
| 206 | */ |
| 207 | |
| 208 | graphics_register_reset(DPA_AUX_CH_CTL, DPA_AUX_CH_DATA1, verbose); |
| 209 | |
| 210 | /* failures after this point can return without |
| 211 | * powering off the panel. |
| 212 | */ |
| 213 | |
| 214 | if (1) |
| 215 | goto fail; |
| 216 | /* failures after this point MUST power off the panel |
| 217 | * and wait 600 ms. |
| 218 | */ |
| 219 | |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 220 | i915_init_done = 1; |
Kyösti Mälkki | ab56b3b | 2013-11-28 16:44:51 +0200 | [diff] [blame] | 221 | return i915_init_done; |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 222 | |
| 223 | fail: |
| 224 | printk(BIOS_SPEW, "Graphics could not be started;"); |
| 225 | if (must_cycle_power){ |
| 226 | printk(BIOS_SPEW, "Turn off power and wait ..."); |
| 227 | io_i915_write32(0xabcd0000, PCH_PP_CONTROL); |
| 228 | udelay(600000); |
| 229 | } |
| 230 | printk(BIOS_SPEW, "Returning.\n"); |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 231 | return 0; |
Ronald G. Minnich | 4f78b18 | 2013-04-17 16:57:30 -0700 | [diff] [blame] | 232 | |
Ronald G. Minnich | 2a66d6b | 2013-03-28 17:01:43 -0700 | [diff] [blame] | 233 | } |