From 564e90f57185274130aba7b157a7dca1941dcfef Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Fri, 4 May 2012 15:37:18 -0700 Subject: Add a tool to work on i915 hardware in user mode This is the beginning of a tool that transforms the i9x5 code to user mode code. Consider this a very early stage although it does produce two programs. Requires spatch 1.0 or greater. To try it out, assuming you have an up-to-date spatch, sh transform make make broken Please don't fall to the temptation to auto-magicize this process. It's primitive for a reason. That said, suggestions welcome of course. Change-Id: I0188e36637b198b06c17f6d3c714d990e88bd57d Signed-off-by: Ronald G. Minnich Reviewed-on: http://review.coreboot.org/1003 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich --- util/i915tool/main.c | 255 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 255 insertions(+) create mode 100644 util/i915tool/main.c (limited to 'util/i915tool/main.c') diff --git a/util/i915tool/main.c b/util/i915tool/main.c new file mode 100644 index 0000000000..cb828e1da3 --- /dev/null +++ b/util/i915tool/main.c @@ -0,0 +1,255 @@ +/* + * This file is part of i915tool + * + * Copyright (C) 2012 The ChromiumOS Authors. All rights reserved. + * + * 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 "video.h" + +int verbose = 1; +static unsigned short addrport, dataport; +struct drm_device *i915; +unsigned short vendor=0x8086, device=0x0116; +struct pci_dev fake = {.vendor_id=0x8086, .device_id = 0x0116}; +int dofake = 0; +u8 *bios_image = NULL; +u8 *mmiobase; +u32 mmiophys; +int mmiosize; +size_t bios_image_size; +/* temporary */ +unsigned int i915_lvds_downclock = 0; +int i915_vbt_sdvo_panel_type = -1; + +/* */ + +/* not sure how we want to do this so let's guess */ +/* to make it easy, we start at zero and assume 250 hz. */ +unsigned long msecs(void) +{ + struct timeval start, now; + static int first = 0; + unsigned long j; + if (! first++) + gettimeofday(&start, NULL); + gettimeofday(&now, NULL); + j = (now.tv_sec - start.tv_sec)*1000 + (now.tv_usec-start.tv_usec)/1000; + return j; +} + +void +mdelay(unsigned long ms) +{ + unsigned long start; + start = msecs(); + while (msecs() < (start + ms)) + ; +} + +void +hexdump(u8 *base, int size) +{ + int i, j; + for(i = 0; i < size/sizeof(u32); i += 8) { + printf("%#x: ", i); + for(j = 0; j < 8; j++) + printf("%08x", base[i+j]); + printf("\n"); + } +} +void udelay(int i) +{ + printf("UDELAY!\n"); +} + +unsigned long io_I915_READ(unsigned long addr) +{ + unsigned long val; + if (dofake) + return 0xcafebabe; + outl(addr, addrport); + val = inl(dataport); + if (verbose) + fprintf(stderr, "%s: %x <- %x\n", __func__, val, addr); + return val; +} + +void io_I915_WRITE(unsigned long addr, unsigned long val) +{ + if (dofake) + return; + outl(addr, addrport); + outl(val, dataport); + if (verbose) + fprintf(stderr, "%s: %x -> %x\n", __func__, val, addr); +} + +unsigned long I915_READ(unsigned long addr) +{ + volatile u32 *ptr = (u32 *)(mmiobase + addr); + unsigned long val; + if (dofake) + return 0xcafebabe; + val = *ptr; + if (verbose) + fprintf(stderr, "%s: %x <- %x\n", __func__, val, addr); + return val; +} + +void I915_WRITE(unsigned long addr, unsigned long val) +{ + volatile u32 *ptr = (u32 *)(mmiobase + addr); + if (dofake) + return; + *ptr = val; + if (verbose) + fprintf(stderr, "%s: %x -> %x\n", __func__, val, addr); +} + +u16 I915_READ16(unsigned long addr) +{ + volatile u16 *ptr = (u16 *)(mmiobase + addr); + unsigned long val; + if (dofake) + return 0xbabe; + val = *ptr; + if (verbose) + fprintf(stderr, "%s: %x <- %x\n", __func__, val, addr); + return val; +} + +void I915_WRITE16(unsigned long addr, u16 val) +{ + volatile u16 *ptr = (u16 *)(mmiobase + addr); + if (dofake) + return; + *ptr = val; + if (verbose) + fprintf(stderr, "%s: %x -> %x\n", __func__, val, addr); +} + +#define GTT_RETRY 1000 +static int gtt_poll(u32 reg, u32 mask, u32 value) +{ + unsigned try = GTT_RETRY; + u32 data; + + while (try--) { + data = I915_READ(reg); + if ((data & mask) == value){ + printf("succeeds after %d tries\n", GTT_RETRY-try); + return 1; + } + udelay(10); + } + + fprintf(stderr, "GT init timeout\n"); + return 0; +} +void *pci_map_rom(struct pci_dev *dev, size_t *size) +{ + *size = bios_image_size; + return bios_image; +} + +void *pci_unmap_rom(struct pci_dev *dev, void *bios) +{ + return NULL; +} + +void *dmi_check_system(unsigned long ignore) +{ + return NULL; +} + +void +mapit(void) +{ + int kfd; + kfd = open("/dev/mem", O_RDWR); + if (kfd < 0) + errx(1, "/dev/kmem"); + mmiobase = mmap(NULL, mmiosize, PROT_WRITE|PROT_READ, MAP_SHARED, kfd, + mmiophys); + if ((void *)-1 == mmiobase) + errx(1, "mmap"); +} + +void +devinit() +{ + u32 val; + /* force wake. */ + I915_WRITE(0xa18c, 1); + gtt_poll(0x130090, 1, 1); +} +int main(int argc, char *argv[]) +{ + struct pci_dev *pci_dev_find(struct drm_device *dev); + + for(argc--, argv++; argc; argc--, argv++) { + if (argv[0][0] != '-') + break; + if (!strcmp(argv[0], "-f")) + dofake++; + } + i915 = calloc(1, sizeof(*i915)); + i915->dev_private = calloc(1, sizeof(*i915->dev_private)); + /* until we do a bit more w/ coccinelle */ + i915->dev_private->dev = i915; + + if (dofake) { + i915->pdev = &fake; + if (! find_idlist(i915, vendor, device)) + errx(1, "can't find fake device in pciidlist"); + } else { + if (! pci_dev_find(i915)) + errx(1, "No VGA device of any kind found\n"); + } + + if (argc) { + FILE *fd; + int amt; + /* size it later */ + bios_image = malloc(8*1048576); + fd = fopen(argv[0], "r"); + amt = fread(bios_image, 65536, 128, fd); + if (amt < 1) { + free(bios_image); + } else { + i915->bios_bin = bios_image; + i915->dev_private->opregion.vbt = bios_image; + bios_image_size = amt * 65536; + fclose(fd); + } + } + /* get the base address for the mmio indirection registers -- BAR 2 */ + addrport = i915->pdev->base_addr[4] & ~3; + dataport = addrport + 4; + printf("Addrport is at %x, dataport at %x\n", addrport, dataport); + /* get the base of the mmio space */ + mmiophys = i915->pdev->base_addr[0] & ~0xf; + mmiosize = i915->pdev->size[0]; + printf("phys base is %#x, size %d\n", mmiophys, mmiosize); + mapit(); + devinit(); + //hexdump(mmiobase, mmiosize); + /* we should use ioperm but hey ... it's had troubles */ + iopl(3); + intel_setup_bios(i915); + if (i915->bios_bin) + intel_parse_bios(i915); +} -- cgit v1.2.3