diff options
Diffstat (limited to 'src/northbridge/via')
| -rw-r--r-- | src/northbridge/via/cn700/Config.lb | 25 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/agp.c | 165 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/chip.h | 25 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/cn700.h | 53 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/northbridge.c | 216 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/northbridge.h | 26 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/raminit.c | 373 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/raminit.h | 29 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vga.c | 125 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vgabios.c | 839 | ||||
| -rw-r--r-- | src/northbridge/via/cn700/vgachip.h | 30 |
11 files changed, 1906 insertions, 0 deletions
diff --git a/src/northbridge/via/cn700/Config.lb b/src/northbridge/via/cn700/Config.lb new file mode 100644 index 0000000000..aca169c868 --- /dev/null +++ b/src/northbridge/via/cn700/Config.lb @@ -0,0 +1,25 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> +## +## 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; either version 2 of the License, or +## (at your option) any later version. +## +## 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 +## + +config chip.h +object vgabios.o +object northbridge.o +driver agp.o +driver vga.o diff --git a/src/northbridge/via/cn700/agp.c b/src/northbridge/via/cn700/agp.c new file mode 100644 index 0000000000..7158369cb3 --- /dev/null +++ b/src/northbridge/via/cn700/agp.c @@ -0,0 +1,165 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 <console/console.h> +#include <arch/io.h> +#include <stdint.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include "chip.h" +#include "northbridge.h" +#include "cn700.h" + +/* This is the main AGP device, and only one used when configured for AGP 2.0 */ +static void agp_init(device_t dev) +{ + u32 reg32; + + /* Some of this may not be necessary, + * it should be handled by the OS */ + printk_debug("Enabling AGP.\n"); + + /* Allow R/W access to AGP registers */ + pci_write_config8(dev, 0x4d, 0x15); + + /* Setup PCI latency timer */ + pci_write_config8(dev, 0xd, 0x8); + + /* Set to AGP 3.0 Mode, which should theoretically render the rest of + * the registers set here pointless */ + pci_write_config8(dev, 0x84, 0xb); + + /* AGP Request Queue Size */ + pci_write_config8(dev, 0x4a, 0x1f); + /* AGP Hardware Support (default 0xc4) + * 7: AGP SBA Enable (1 to Enable) + * 6: AGP Enable + * 5: Reserved + * 4: Fast Write Enable + * 3: AGP8X Mode Enable + * 2: AGP4X Mode Enable + * 1: AGP2X Mode Enable + * 0: AGP1X Mode Enable */ + pci_write_config8(dev, 0x4b, 0xc4); + + /* Enable AGP Backdoor */ + pci_write_config8(dev, 0xb5, 0x03); + + /* Set aperture to 32MB */ + /* TODO: Use config option, explain how it works */ + pci_write_config32(dev, 0x94, 0x00010f38); + /* Set GART Table Base Address (31:12) */ + pci_write_config32(dev, 0x98, (0x1558 << 12)); + /* Set AGP Aperture Base */ + pci_write_config32(dev, 0x10, 0xf8000008); + + /* Enable CPU/PMSTR GART Access */ + reg32 = pci_read_config8(dev, 0xbf); + reg32 |= 0x80; + pci_write_config8(dev, 0xbf, reg32); + + /* Enable AGP Aperture. */ + reg32 = pci_read_config32(dev, 0x94); + reg32 |= (3 << 7); + pci_write_config32(dev, 0x90, reg32); + + /* AGP Control */ + pci_write_config8(dev, 0xbc, 0x21); + pci_write_config8(dev, 0xbd, 0xd2); + + /* AGP Pad, driving strength, and delay control */ + /* All this should be constant, seeing as the + * VGA controller is onboard */ + pci_write_config8(dev, 0x40, 0xc7); + pci_write_config8(dev, 0x41, 0xdb); + pci_write_config8(dev, 0x42, 0x10); + pci_write_config8(dev, 0x43, 0xdb); + pci_write_config8(dev, 0x44, 0x24); + + /* AGPC CKG Control */ + pci_write_config8(dev, 0xc0, 0x02); + pci_write_config8(dev, 0xc1, 0x02); +} + +static const struct device_operations agp_operations = { + .read_resources = cn700_noop, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = agp_init, + .ops_pci = 0, +}; + +static const struct pci_driver agp_driver __pci_driver = { + .ops = &agp_operations, + .vendor = PCI_VENDOR_ID_VIA, + .device = PCI_DEVICE_ID_VIA_CN700_AGP, +}; + +/* This is the AGP 3.0 "bridge" @Bus 0 Device 1 Func 0. When using AGP 3.0, the +config in this device takes presidence. We configure both just to be safe. */ +static void agp_bridge_init(device_t dev) +{ + printk_debug("Setting up AGP Bridge device\n"); + pci_write_config16(dev, 0x4, 0x0007); + + /* Secondary Bus Number */ + pci_write_config8(dev, 0x19, 0x01); + /* Subordinate Bus Number */ + pci_write_config8(dev, 0x1a, 0x01); + /* IO Base */ + pci_write_config8(dev, 0x1c, 0xd0); + /* IO Limit */ + pci_write_config8(dev, 0x1d, 0xd0); + + /* Memory Base */ + pci_write_config16(dev, 0x20, 0xfb00); + /* Memory Limit */ + pci_write_config16(dev, 0x22, 0xfcf0); + /* Prefetchable Memory Base */ + pci_write_config16(dev, 0x24, 0xf400); + /* Prefetchable Memory Limit */ + pci_write_config16(dev, 0x26, 0xf7f0); + /* Enable VGA Compatible Memory/IO Range */ + pci_write_config8(dev, 0x3e, 0x08); + + /* Second PCI Bus Control (see datasheet) */ + pci_write_config8(dev, 0x40, 0x83); + pci_write_config8(dev, 0x41, 0x43); + pci_write_config8(dev, 0x42, 0xe2); + pci_write_config8(dev, 0x43, 0x44); + pci_write_config8(dev, 0x44, 0x34); + pci_write_config8(dev, 0x45, 0x72); +} + +static const struct device_operations agp_bridge_operations = { + .read_resources = cn700_noop, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .init = agp_bridge_init, + .scan_bus = pci_scan_bridge, + .ops_pci = 0, +}; + +static const struct pci_driver agp_bridge_driver __pci_driver = { + .ops = &agp_bridge_operations, + .vendor = PCI_VENDOR_ID_VIA, + .device = PCI_DEVICE_ID_VIA_CN700_BRIDGE, +}; diff --git a/src/northbridge/via/cn700/chip.h b/src/northbridge/via/cn700/chip.h new file mode 100644 index 0000000000..aff009c888 --- /dev/null +++ b/src/northbridge/via/cn700/chip.h @@ -0,0 +1,25 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +struct northbridge_via_cn700_config +{ +}; + +extern struct chip_operations northbridge_via_cn700_ops; diff --git a/src/northbridge/via/cn700/cn700.h b/src/northbridge/via/cn700/cn700.h new file mode 100644 index 0000000000..b9d7ad3455 --- /dev/null +++ b/src/northbridge/via/cn700/cn700.h @@ -0,0 +1,53 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +#ifndef __ROMCC__ +static void cn700_noop(){} +#endif + +/* VGA stuff */ +#define SR_INDEX 0x3c4 +#define SR_DATA 0x3c5 +#define CRTM_INDEX 0x3b4 +#define CRTM_DATA 0x3b5 +#define CRTC_INDEX 0x3d4 +#define CRTC_DATA 0x3d5 + +/* Memory Controller Registers */ +#define RANK0_END 0x40 +#define RANK1_END 0x41 +#define RANK2_END 0x42 +#define RANK3_END 0x43 +#define RANK0_START 0x48 +#define RANK1_START 0x49 +#define RANK2_START 0x4a +#define RANK3_START 0x4b +#define DDR_PAGE_CTL 0x69 +#define DRAM_REFRESH_COUNTER 0x6a +#define DRAM_MISC_CTL 0x6b +#define CH_A_DQS_OUTPUT_DELAY 0x70 +#define CH_A_MD_OUTPUT_DELAY 0x71 + +/* RAM Init Commands */ +#define RAM_COMMAND_NORMAL 0x0 +#define RAM_COMMAND_NOP 0x1 +#define RAM_COMMAND_PRECHARGE 0x2 +#define RAM_COMMAND_MRS 0x3 +#define RAM_COMMAND_CBR 0x4 diff --git a/src/northbridge/via/cn700/northbridge.c b/src/northbridge/via/cn700/northbridge.c new file mode 100644 index 0000000000..642661f308 --- /dev/null +++ b/src/northbridge/via/cn700/northbridge.c @@ -0,0 +1,216 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 <console/console.h> +#include <arch/io.h> +#include <stdint.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <stdlib.h> +#include <string.h> +#include <bitops.h> +#include <cpu/cpu.h> +#include "chip.h" +#include "northbridge.h" +#include "cn700.h" + +static void memctrl_init(device_t dev) +{ + u16 reg16; + + pci_write_config8(dev, 0x86, 0x2d); + + /* Set up the vga framebuffer size */ + reg16 = (log2(CONFIG_VIDEO_MB) << 12) | (1 << 15); + pci_write_config16(dev, 0xa0, reg16); + + /* Set up VGA timers */ + pci_write_config8(dev, 0xa2, 0x44); + + pci_write_config16(dev, 0xb0, 0xaa60); + pci_write_config8(dev, 0xb8, 0x08); +} + +static const struct device_operations memctrl_operations = { + .read_resources = cn700_noop, + .init = memctrl_init, +}; + +static const struct pci_driver memctrl_driver __pci_driver = { + .ops = &memctrl_operations, + .vendor = PCI_VENDOR_ID_VIA, + .device = PCI_DEVICE_ID_VIA_CN700_MEMCTRL, +}; + +static void pci_domain_read_resources(device_t dev) +{ + struct resource *resource; + + printk_spew("Entering cn700 pci_domain_read_resources.\n"); + + /* Initialize the system wide io space constraints */ + resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0,0)); + resource->limit = 0xffffUL; + resource->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED; + + /* Initialize the system wide memory resources constraints */ + resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1,0)); + resource->limit = 0xffffffffULL; + resource->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED; + + printk_spew("Leaving cn700 pci_domain_read_resources.\n"); +} + +static void ram_resource(device_t dev, unsigned long index, + unsigned long basek, unsigned long sizek) +{ + struct resource *resource; + + if (!sizek) { + return; + } + resource = new_resource(dev, index); + resource->base = ((resource_t)basek) << 10; + resource->size = ((resource_t)sizek) << 10; + resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | \ + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; +} + +static void tolm_test(void *gp, struct device *dev, struct resource *new) +{ + struct resource **best_p = gp; + struct resource *best; + best = *best_p; + if (!best || (best->base > new->base)) { + best = new; + } + *best_p = best; +} + +static u32 find_pci_tolm(struct bus *bus) +{ + print_debug("Entering find_pci_tolm\n"); + struct resource *min; + u32 tolm; + min = 0; + search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, &min); + tolm = 0xffffffffUL; + if (min && tolm > min->base) { + tolm = min->base; + } + print_debug("Leaving find_pci_tolm\n"); + return tolm; +} + +static void pci_domain_set_resources(device_t dev) +{ + static const u8 ramregs[] = {0x40, 0x41, 0x42, 0x43}; + device_t mc_dev; + u32 pci_tolm; + + printk_spew("Entering cn700 pci_domain_set_resources.\n"); + + pci_tolm = find_pci_tolm(&dev->link[0]); + mc_dev = dev_find_device(PCI_VENDOR_ID_VIA, + PCI_DEVICE_ID_VIA_CN700_MEMCTRL, 0); + + if (mc_dev) { + unsigned long tomk, tolmk; + unsigned char rambits; + int i, idx; + + for(rambits = 0, i = 0; i < ARRAY_SIZE(ramregs); i++) { + unsigned char reg; + reg = pci_read_config8(mc_dev, ramregs[i]); + rambits += reg; + } + + tomk = rambits; + /* Compute the Top Of Low Memory, in Kb */ + tolmk = pci_tolm >> 10; + if (tolmk >= tomk) { + /* The PCI hole does does not overlap the memory. */ + tolmk = tomk; + } + /* Report the memory regions */ + idx = 10; + /* TODO: Hole needed? */ + ram_resource(dev, idx++, 0, 640); /* first 640k */ + /* Leave a hole for vga */ + ram_resource(dev, idx++, 768, (tolmk - 768 - + (CONFIG_VIDEO_MB * 1024))); + } + assign_resources(&dev->link[0]); +} + +static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) +{ + printk_spew("Entering cn700 pci_domain_scan_bus.\n"); + + max = pci_scan_bus(&dev->link[0], PCI_DEVFN(0, 0), 0xff, max); + return max; +} + +static const struct device_operations pci_domain_ops = { + .read_resources = pci_domain_read_resources, + .set_resources = pci_domain_set_resources, + .enable_resources = enable_childrens_resources, + .init = 0, + .scan_bus = pci_domain_scan_bus, +}; + +static void cpu_bus_init(device_t dev) +{ + initialize_cpus(&dev->link[0]); +} + +static void cpu_bus_noop(device_t dev) +{ +} + +static const struct device_operations cpu_bus_ops = { + .read_resources = cpu_bus_noop, + .set_resources = cpu_bus_noop, + .enable_resources = cpu_bus_noop, + .init = cpu_bus_init, + .scan_bus = 0, +}; + +static void enable_dev(struct device *dev) +{ + printk_spew("In cn700 enable_dev for device %s.\n", dev_path(dev)); + + /* Set the operations if it is a special bus type */ + if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { + dev->ops = &pci_domain_ops; + pci_set_method(dev); + } + else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { + dev->ops = &cpu_bus_ops; + } +} + +struct chip_operations northbridge_via_cn700_ops = { + CHIP_NAME("VIA CN700 Northbridge") + .enable_dev = enable_dev, +}; diff --git a/src/northbridge/via/cn700/northbridge.h b/src/northbridge/via/cn700/northbridge.h new file mode 100644 index 0000000000..bb616920c5 --- /dev/null +++ b/src/northbridge/via/cn700/northbridge.h @@ -0,0 +1,26 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +#ifndef NORTHBRIDGE_VIA_CN700_H +#define NORTHBRIDGE_VIA_CN700_H + +extern unsigned int cn700_scan_root_bus(device_t root, unsigned int max); + +#endif /* NORTHBRIDGE_VIA_CN700_H */ diff --git a/src/northbridge/via/cn700/raminit.c b/src/northbridge/via/cn700/raminit.c new file mode 100644 index 0000000000..a9efd4e4d3 --- /dev/null +++ b/src/northbridge/via/cn700/raminit.c @@ -0,0 +1,373 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 <spd.h> +#include <sdram_mode.h> +#include <delay.h> +#include "cn700.h" + +//#define DEBUG_RAM_SETUP 1 + +#ifdef DEBUG_RAM_SETUP +#define PRINT_DEBUG_MEM(x) print_debug(x) +#define PRINT_DEBUG_MEM_HEX8(x) print_debug_hex8(x) +#define PRINT_DEBUG_MEM_HEX16(x) print_debug_hex16(x) +#define PRINT_DEBUG_MEM_HEX32(x) print_debug_hex32(x) +#define DUMPNORTH() dump_pci_device(PCI_DEV(0, 0, 0)) +#else +#define PRINT_DEBUG_MEM(x) +#define PRINT_DEBUG_MEM_HEX8(x) +#define PRINT_DEBUG_MEM_HEX16(x) +#define PRINT_DEBUG_MEM_HEX32(x) +#define DUMPNORTH() +#endif + +static void do_ram_command(device_t dev, u8 command, u32 addr_offset) +{ + u8 reg; + + /* TODO: Support for multiple DIMMs. */ + + reg = pci_read_config8(dev, DRAM_MISC_CTL); + reg &= 0xf8; /* Clear bits 2-0. */ + reg |= command; + pci_write_config8(dev, DRAM_MISC_CTL, reg); + + PRINT_DEBUG_MEM(" Sending RAM command 0x"); + PRINT_DEBUG_MEM_HEX8(reg); + PRINT_DEBUG_MEM(" to 0x"); + PRINT_DEBUG_MEM_HEX32(0 + addr_offset); + PRINT_DEBUG_MEM("\r\n"); + + read32(0 + addr_offset); +} + + +/** + * Configure the bus between the cpu and the northbridge. This might be able to + * be moved to post-ram code in the future. For the most part, these registers + * should not be messed around with. These are too complex to explain short of + * copying the datasheets into the comments, but most of these values are from + * the BIOS Porting Guide, so they should work on any board. If they don't, + * try the values from your factory BIOS. + * + * TODO: Changing the DRAM frequency doesn't work (hard lockup) + * + * @param dev The northbridge's CPU Host Interface (D0F2) + */ +static void c7_cpu_setup(device_t dev) +{ + /* Host bus interface registers (D0F2 0x50-0x67) */ + /* Request phase control */ + pci_write_config8(dev, 0x50, 0x88); + /* CPU Interface Control */ + pci_write_config8(dev, 0x51, 0x7a); + pci_write_config8(dev, 0x52, 0x6f); + /* Arbitration */ + pci_write_config8(dev, 0x53, 0x88); + /* Miscellaneous Control */ + pci_write_config8(dev, 0x54, 0x10); + pci_write_config8(dev, 0x55, 0x16); + /* Write Policy */ + pci_write_config8(dev, 0x56, 0x01); + /* Miscellaneous Control */ + /* DRAM Operating Frequency (Bits 7:5) + * 000 : 100MHz 001 : 133MHz + * 010 : 166MHz 011 : 200MHz + * 100 : 266MHz 101 : 333MHz + * 110/111 : Reserved */ + //pci_write_config8(dev, 0x57, 0x60);//set 200MHz dram clock + /* CPU Miscellaneous Control */ + pci_write_config8(dev, 0x59, 0x60); + /* Write Policy */ + pci_write_config8(dev, 0x5d, 0xb2); + /* Bandwidth Timer */ + pci_write_config8(dev, 0x5e, 0x88); + /* CPU Miscellaneous Control */ + pci_write_config8(dev, 0x5f, 0xc7); + + /* Line DRDY# Timing Control */ + pci_write_config8(dev, 0x60, 0xff); + pci_write_config8(dev, 0x61, 0xff); + pci_write_config8(dev, 0x62, 0x0f); + /* QW DRDY# Timing Control */ + pci_write_config8(dev, 0x63, 0xff); + pci_write_config8(dev, 0x64, 0xff); + pci_write_config8(dev, 0x65, 0x0f); + /* Read Line Burst DRDY# Timing Control */ + pci_write_config8(dev, 0x66, 0xff); + pci_write_config8(dev, 0x67, 0x70); + + /* Host Bus IO Circuit (See datasheet) */ + /* Host Address Pullup/down Driving */ + pci_write_config8(dev, 0x70, 0x33); + pci_write_config8(dev, 0x71, 0x00); + pci_write_config8(dev, 0x72, 0x33); + pci_write_config8(dev, 0x73, 0x00); + /* Miscellaneous Control */ + pci_write_config8(dev, 0x74, 0x00); + /* AGTL+ I/O Circuit */ + pci_write_config8(dev, 0x75, 0x28); + /* AGTL+ Compensation Status */ + pci_write_config8(dev, 0x76, 0x74); + /* AGTL+ Auto Compensation Offest */ + pci_write_config8(dev, 0x77, 0x00); + /* Host FSB CKG Control */ + pci_write_config8(dev, 0x78, 0x0a); + /* Address/Address Clock Output Delay Control */ + pci_write_config8(dev, 0x79, 0xaa); + /* Address Strobe Input Delay Control */ + pci_write_config8(dev, 0x7a, 0x24); + /* Address CKG Rising/Falling Time Control */ + pci_write_config8(dev, 0x7b, 0x00); + /* Address CKG Clock Rising/Falling Time Control */ + pci_write_config8(dev, 0x7c, 0x00); + /* Undefined (can't remember why I did this) */ + pci_write_config8(dev, 0x7d, 0x6d); +} + +/** + * Set up various ram and other control registers statically. Some of these may + * not be needed, other should be done with spd info, but that's a project for + * the future + */ +static void sdram_set_registers(const struct mem_controller *ctrl) +{ + /* DQ/DQS Strength Control */ + pci_write_config8(ctrl->d0f3, 0xd0, 0x88); + pci_write_config8(ctrl->d0f3, 0xd1, 0x8b); + pci_write_config8(ctrl->d0f3, 0xd2, 0x89); + /* SMM and APIC Decoding */ + pci_write_config8(ctrl->d0f3, 0x86, 0x2d); + + /* Driving selection */ + /* DQ / DQS ODT Driving and Range Select */ + pci_write_config8(ctrl->d0f3, 0xd5, 0x8a); + /* Memory Pads Driving and Range Select */ + pci_write_config8(ctrl->d0f3, 0xd6, 0xaa); + /* DRAM Driving – Group DQS */ + pci_write_config8(ctrl->d0f3, 0xe0, 0xee); + /* DRAM Driving – Group DQ (DQ, MPD, DQM) */ + pci_write_config8(ctrl->d0f3, 0xe2, 0xac);//ba + /* DRAM Driving – Group CS */ + pci_write_config8(ctrl->d0f3, 0xe4, 0x66); + /* DRAM Driving – Group MA */ + pci_write_config8(ctrl->d0f3, 0xe8, 0x86); + /* DRAM Driving – Group MCLK */ + pci_write_config8(ctrl->d0f3, 0xe6, 0xaa); + + /* ODT (some are set with driving select above) */ + /* Memory Pad ODT Pullup / Pulldown Control */ + pci_write_config8(ctrl->d0f3, 0xd4, 0x0a); + /* Memory Ranks ODT Lookup Table */ + pci_write_config8(ctrl->d0f3, 0xd8, 0x00);//was 1 + /* Compensation Control */ + pci_write_config8(ctrl->d0f3, 0xd3, 0x89);//enable auto compensation + + /* MCLKO Phase Control */ + pci_write_config8(ctrl->d0f3, 0x91, 0x02); + /* CS/CKE Clock Phase Control */ + pci_write_config8(ctrl->d0f3, 0x92, 0x06); + /* SCMD/MA Clock Phase Control */ + pci_write_config8(ctrl->d0f3, 0x93, 0x07); + /* Channel A DQS Input Capture Range Control */ + pci_write_config8(ctrl->d0f3, 0x78, 0x83); + /* DQS Input Capture Range Control */ + /* Set in accordance with the BIOS update note */ + pci_write_config8(ctrl->d0f3, 0x7a, 0x00); + /* DQS Input Delay Offset Control */ + pci_write_config8(ctrl->d0f3, 0x7c, 0x00); + /* SDRAM ODT Control */ + pci_write_config8(ctrl->d0f3, 0xda, 0x80); + /* DQ/DQS CKG Output Delay Control - I */ + pci_write_config8(ctrl->d0f3, 0xdc, 0xff); + /* DQ/DQS CKG Output Delay Control - II */ + pci_write_config8(ctrl->d0f3, 0xdd, 0xff); + /* DQS / DQ CKG Duty Cycle Control */ + pci_write_config8(ctrl->d0f3, 0xec, 0x88); + /* MCLK Output Duty Control */ + pci_write_config8(ctrl->d0f3, 0xee, 0x00); + pci_write_config8(ctrl->d0f3, 0xed, 0x10); + /* DQS CKG Input Delay Control */ + pci_write_config8(ctrl->d0f3, 0xef, 0x10); + + pci_write_config8(ctrl->d0f3, 0x77, 0x9d); + pci_write_config8(ctrl->d0f3, 0x79, 0x83); + pci_write_config16(ctrl->d0f3, 0x88, 0x0020); + + pci_write_config8(ctrl->d0f4, 0xa7, 0x80); + + /* VLink Control */ + pci_write_config8(ctrl->d0f7, 0xb0, 0x05); + pci_write_config8(ctrl->d0f7, 0xb1, 0x01); + + /* Memory base */ + pci_write_config16(ctrl->d1f0, 0x20, 0xfb00); + /* Memory limit */ + pci_write_config16(ctrl->d1f0, 0x22, 0xfcf0); + /* Prefetch memory base */ + pci_write_config16(ctrl->d1f0, 0x24, 0xf400); + /* Prefetch memory limit */ + pci_write_config16(ctrl->d1f0, 0x26, 0xf7f0); + /* PCI to PCI bridge control */ + pci_write_config16(ctrl->d1f0, 0x3e, 0x0008); + + /* CPU to PCI flow control 1 */ + pci_write_config8(ctrl->d1f0, 0x40, 0x83); + pci_write_config8(ctrl->d1f0, 0x41, 0xc3);//clear reset error, set to 43 + pci_write_config8(ctrl->d1f0, 0x42, 0xe2); + pci_write_config8(ctrl->d1f0, 0x43, 0x44); + pci_write_config8(ctrl->d1f0, 0x44, 0x34); + pci_write_config8(ctrl->d1f0, 0x45, 0x72); + + /* Disable cross bank/multi page mode */ + pci_write_config8(ctrl->d0f3, DDR_PAGE_CTL, 0x80); + pci_write_config8(ctrl->d0f3, DRAM_REFRESH_COUNTER, 0x00); + + /* Set WR=5 and RFC */ + pci_write_config8(ctrl->d0f3, 0x61, 0xc7); + /* Set CAS=5 */ + pci_write_config8(ctrl->d0f3, 0x62, 0xaf); + pci_write_config8(ctrl->d0f3, 0x63, 0xca); + /* Set to DDR2 sdram, BL=8 (0xc8, 0xc0 for bl=4) */ + pci_write_config8(ctrl->d0f3, 0x6c, 0xc8); + /* Allow manual dll reset */ + pci_write_config8(ctrl->d0f3, 0x6b, 0x10); + + pci_write_config8(ctrl->d0f3, 0x6e, 0x89); + pci_write_config8(ctrl->d0f3, 0x67, 0x50); + pci_write_config8(ctrl->d0f3, 0x65, 0xd9); + + /* Only enable bank 1, for now */ + /* TODO: Multiple, dynamically controlled bank enables */ + pci_write_config8(ctrl->d0f3, 0x54, 0x80); + pci_write_config8(ctrl->d0f3, 0x55, 0x00); + + /* Set to 2T, MA Map type 1. + * TODO: Needs to become dynamic */ + pci_write_config16(ctrl->d0f3, 0x50, 0x0020); + + /* BA0-2 Selection. Don't mess with */ + pci_write_config8(ctrl->d0f3, 0x52, 0x33); + pci_write_config8(ctrl->d0f3, 0x53, 0x3f); + + /* Disable bank interleaving. This feature seems useless anyways */ + pci_write_config32(ctrl->d0f3, 0x58, 0x00000000); + pci_write_config8(ctrl->d0f3, 0x88, 0x08); + + /* Some DQS control stuffs */ + pci_write_config8(ctrl->d0f3, 0x74, 0x04); + pci_write_config8(ctrl->d0f3, 0x75, 0x04); + pci_write_config8(ctrl->d0f3, 0x76, 0x00); +} + +/** + * Set up dram size according to spd data. Eventually, DRAM timings should be + * done in a similar manner. + * + * @param ctrl The northbridge devices and spd addresses. + */ +static void sdram_set_spd_registers(const struct mem_controller *ctrl) +{ + u8 spd_data, spd_data2; + + /* DRAM Bank Size */ + spd_data = spd_read_byte(ctrl->channel0[0], + SPD_DENSITY_OF_EACH_ROW_ON_MODULE); + /* I know this seems weird. Blame JEDEC/Via. */ + if(spd_data >= 0x10) + spd_data = spd_data >> 1; + else + spd_data = spd_data << 1; + + /* Check for double sided dimm and adjust size accordingly */ + spd_data2 = spd_read_byte(ctrl->channel0[0], SPD_NUM_BANKS_PER_SDRAM); + /* There should be 4 banks on a single sided dimm, + * or 8 on a dual sided one */ + spd_data = spd_data * (spd_data2 / 4); + pci_write_config8(ctrl->d0f3, 0x40, spd_data); + /* TODO: The rest of the DIMMs */ +} + +static void sdram_enable(device_t dev) +{ + int i; + + /* 1. Apply NOP. */ + PRINT_DEBUG_MEM("RAM Enable 1: Apply NOP\r\n"); + do_ram_command(dev, RAM_COMMAND_NOP, 0); + udelay(200); + + /* 2. Precharge all. */ + PRINT_DEBUG_MEM("RAM Enable 2: Precharge all\r\n"); + do_ram_command(dev, RAM_COMMAND_PRECHARGE, 0); + + /* 3. Mode register set. */ + PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n"); + do_ram_command(dev, RAM_COMMAND_MRS, 0x2000);//enable dll + do_ram_command(dev, RAM_COMMAND_MRS, 0x800);//reset dll + + /* 4. Precharge all again. */ + PRINT_DEBUG_MEM("RAM Enable 2: Precharge all\r\n"); + do_ram_command(dev, RAM_COMMAND_PRECHARGE, 0); + + /* 5. Perform 8 refresh cycles. Wait tRC each time. */ + PRINT_DEBUG_MEM("RAM Enable 3: CBR\r\n"); + do_ram_command(dev, RAM_COMMAND_CBR, 0); + /* First read is actually done by do_ram_command */ + for(i = 0; i < 7; i++) { + udelay(100); + read32(0); + } + + /* 6. Mode register set. */ + PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n"); + //safe value for now, BL=8, WR=5, CAS=5 + /* (E)MRS values are from the BPG. No direct explanation is given, but + * they should somehow conform to the JEDEC DDR2 SDRAM Specification + * (JESD79-2C). */ + do_ram_command(dev, RAM_COMMAND_MRS, 0x0022d8); + + /* 7. Mode register set. */ + PRINT_DEBUG_MEM("RAM Enable 4: Mode register set\r\n"); + do_ram_command(dev, RAM_COMMAND_MRS, 0x21c20);//default OCD calibration + do_ram_command(dev, RAM_COMMAND_MRS, 0x20020);//exit calibration mode + + /* 8. Normal operation */ + PRINT_DEBUG_MEM("RAM Enable 5: Normal operation\r\n"); + do_ram_command(dev, RAM_COMMAND_NORMAL, 0); + + /* Enable multipage mode. */ + pci_write_config8(dev, DDR_PAGE_CTL, 0x83); + /* Enable refresh. */ + pci_write_config8(dev, DRAM_REFRESH_COUNTER, 0x32); + + /* DQS Tuning: testing on a couple different boards has shown this is + * static, or close enough that it can be. Which is good, because the + * tuning function used too many registers. */ + pci_write_config8(dev, CH_A_DQS_OUTPUT_DELAY, 0x00); + pci_write_config8(dev, CH_A_MD_OUTPUT_DELAY, 0x03); + + /* Enable VGA device with no memory, add memory later. We need this + * here to enable the actual device, otherwise it won't show up until + * later and LB will have a fit. */ + pci_write_config16(dev, 0xa0, (1 << 15)); + pci_write_config16(dev, 0xa4, 0x0010); +} diff --git a/src/northbridge/via/cn700/raminit.h b/src/northbridge/via/cn700/raminit.h new file mode 100644 index 0000000000..c2a2ec85d6 --- /dev/null +++ b/src/northbridge/via/cn700/raminit.h @@ -0,0 +1,29 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey_osgood@verizon.net> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +#ifndef RAMINIT_H +#define RAMINIT_H + +#define DIMM_SOCKETS 1 //Only one works, for now. + +struct mem_controller { + device_t d0f0, d0f2, d0f3, d0f4, d0f7, d1f0; + u8 channel0[DIMM_SOCKETS]; +}; diff --git a/src/northbridge/via/cn700/vga.c b/src/northbridge/via/cn700/vga.c new file mode 100644 index 0000000000..15756841fd --- /dev/null +++ b/src/northbridge/via/cn700/vga.c @@ -0,0 +1,125 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +/* Note: Some of the VGA control registers are located on the memory controller. + Registers are set both in raminit.c and northbridge.c */ + +#include <console/console.h> +#include <arch/io.h> +#include <stdint.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <stdlib.h> +#include <string.h> +#include <bitops.h> +#include <cpu/cpu.h> +#include "chip.h" +#include "northbridge.h" +#include "cn700.h" + +void write_protect_vgabios(void) +{ +//Don't bother for now +} + +static void vga_init(device_t dev) +{ + u8 reg8; + + print_debug("Copying BOCHS Bios to 0xf000\n"); +/* Copy the BOCHs BIOS from 0xFFFFFFFF - ROM_SIZE - BOCHs size (64k) to 0xf0000 + This is for compatibility with the VGA ROM's BIOS callbacks */ + memcpy(0xf0000, (0xFFFFFFFF - ROM_SIZE - 0x10000), 0x10000); + + printk_debug("Initializing VGA\n"); + + pci_write_config8(dev, 0x3c, 0xb); + + /* Set memory rate to 200MHz */ + outb(0x3d, CRTM_INDEX); + reg8 = inb(CRTM_DATA); + reg8 &= 0x0f; + reg8 |= (0x1 << 4); + outb(0x3d, CRTM_INDEX); + outb(reg8, CRTM_DATA); + + /* Set framebuffer size */ + reg8 = (CONFIG_VIDEO_MB / 4); + outb(0x39, SR_INDEX); + outb(reg8, SR_DATA); + + + pci_write_config8(dev, 0x04, 0x07); + pci_write_config8(dev, 0x0d, 0x20); + pci_write_config32(dev,0x10, 0xf4000008); + pci_write_config32(dev,0x14, 0xfb000000); + pci_write_config8(dev, 0x3e, 0x02); + pci_write_config8(dev, 0x3c, 0x0a); + + + printk_debug("INSTALL REAL-MODE IDT\n"); + setup_realmode_idt(); + printk_debug("DO THE VGA BIOS\n"); + do_vgabios(); + /* VGA seems to work without this, but crash & burn with it */ + //printk_debug("Enable VGA console\n"); + //vga_enable_console(); + + /* It's not clear if these need to be programmed before or after + * the VGA bios runs. Try both, clean up later */ + /* Set memory rate to 200MHz */ + outb(0x3d, CRTM_INDEX); + reg8 = inb(CRTM_DATA); + reg8 &= 0x0f; + reg8 |= (0x1 << 4); + outb(0x3d, CRTM_INDEX); + outb(reg8, CRTM_DATA); + + /* Set framebuffer size (again) */ + reg8 = (CONFIG_VIDEO_MB / 4); + outb(0x39, SR_INDEX); + outb(reg8, SR_DATA); + + /* Clear the BOCHs Bios out of memory, so it doesn't confuse linux */ + memset(0xf0000, 0, 0x10000); +} + +static void vga_read_resources(device_t dev) +{ + dev->rom_address = 0xfff80000; + dev->on_mainboard=1; + pci_dev_read_resources(dev); +} + + +static const struct device_operations vga_operations = { + .read_resources = vga_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = vga_init, + .ops_pci = 0, +}; + +static const struct pci_driver vga_driver __pci_driver = { + .ops = &vga_operations, + .vendor = PCI_VENDOR_ID_VIA, + .device = PCI_DEVICE_ID_VIA_CN700_VGA, +}; diff --git a/src/northbridge/via/cn700/vgabios.c b/src/northbridge/via/cn700/vgabios.c new file mode 100644 index 0000000000..5a705c2652 --- /dev/null +++ b/src/northbridge/via/cn700/vgabios.c @@ -0,0 +1,839 @@ +#include <console/console.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#undef __KERNEL__ +#include <arch/io.h> +//#include <printk.h> +#include <string.h> +#include "vgachip.h" + +/* vgabios.c. Derived from: */ + +/*------------------------------------------------------------ -*- C -*- + * 2 Kernel Monte a.k.a. Linux loading Linux on x86 + * + * Erik Arjan Hendriks <hendriks@lanl.gov> + * + * This version is a derivative of the original two kernel monte + * which is (C) 2000 Scyld. + * + * Copyright (C) 2000 Scyld Computing Corporation + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Portions related to the alpha architecture are: + * + * Copyright(C) 2001 University of California. LA-CC Number 01-67. + * This software has been authored by an employee or employees of the + * University of California, operator of the Los Alamos National + * Laboratory under Contract No. W-7405-ENG-36 with the U.S. + * Department of Energy. The U.S. Government has rights to use, + * reproduce, and distribute this software. If the software is + * modified to produce derivative works, such modified software should + * be clearly marked, so as not to confuse it with the version + * available from LANL. + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by + * reference to http://www.gnu.org/licenses/gpl.html. + * + * This software is provided by the author(s) "as is" and any express + * or implied warranties, including, but not limited to, the implied + * warranties of merchantability and fitness for a particular purpose + * are disclaimed. In no event shall the author(s) be liable for any + * direct, indirect, incidental, special, exemplary, or consequential + * damages (including, but not limited to, procurement of substitute + * goods or services; loss of use, data, or profits; or business + * interruption) however caused and on any theory of liability, + * whether in contract, strict liability, or tort (including + * negligence or otherwise) arising in any way out of the use of this + * software, even if advised of the possibility of such damage. + * + * $Id: vgabios.c,v 1.5 2004/10/06 17:33:52 rminnich Exp $ + *--------------------------------------------------------------------*/ + +/* Modified to be a self sufficient plug in so that it can be used + without reliance on other parts of coreboot's core + (C) 2005 Nick.Barker9@btinternet.com + + Used initially for epia-m where there are problems getting the bios + emulator to successfully run this bios. +*/ + +/* Declare a temporary global descriptor table - necessary because the + Core part of the bios no longer sets up any 16 bit segments */ +__asm__ ( + /* pointer to original gdt */ + "gdtarg: \n" + " .word gdt_limit \n" + " .long gdt \n" + + /* compute the table limit */ + "__mygdt_limit = __mygdt_end - __mygdt - 1 \n" + + "__mygdtaddr: \n" + " .word __mygdt_limit \n" + " .long __mygdt \n" + + "__mygdt: \n" + /* selgdt 0, unused */ + " .word 0x0000, 0x0000 \n" + " .byte 0x00, 0x00, 0x00, 0x00 \n" + + /* selgdt 8, unused */ + " .word 0x0000, 0x0000 \n" + " .byte 0x00, 0x00, 0x00, 0x00 \n" + + /* selgdt 0x10, flat code segment */ + " .word 0xffff, 0x0000 \n" + " .byte 0x00, 0x9b, 0xcf, 0x00 \n" + + /* selgdt 0x18, flat data segment */ + " .word 0xffff, 0x0000 \n" + " .byte 0x00, 0x93, 0xcf, 0x00 \n" + + /* selgdt 0x20, unused */ + " .word 0x0000, 0x0000 \n" + " .byte 0x00, 0x00, 0x00, 0x00 \n" + + /* selgdt 0x28 16-bit 64k code at 0x00000000 */ + " .word 0xffff, 0x0000 \n" + " .byte 0, 0x9a, 0, 0 \n" + + /* selgdt 0x30 16-bit 64k data at 0x00000000 */ + " .word 0xffff, 0x0000 \n" + " .byte 0, 0x92, 0, 0 \n" + + "__mygdt_end: \n" +); + +/* Declare a pointer to where our idt is going to be i.e. at mem zero */ +__asm__ ("__myidt: \n" + /* 16-bit limit */ + " .word 1023 \n" + /* 24-bit base */ + " .long 0 \n" + " .word 0 \n" +); + +/* The address arguments to this function are PHYSICAL ADDRESSES */ +static void real_mode_switch_call_vga(unsigned long devfn) +{ + __asm__ __volatile__ ( + // paranoia -- does ecx get saved? not sure. This is + // the easiest safe thing to do. + " pushal \n" + /* save the stack */ + " mov %esp, __stack \n" + " jmp 1f \n" + "__stack: .long 0 \n" + "1:\n" + /* get devfn into %ecx */ + " movl %esp, %ebp \n" + " movl 8(%ebp), %ecx \n" + /* load 'our' gdt */ + " lgdt %cs:__mygdtaddr \n" + + /* This configures CS properly for real mode. */ + " ljmp $0x28, $__rms_16bit\n" + "__rms_16bit: \n" + " .code16 \n" + /* 16 bit code from here on... */ + + /* Load the segment registers w/ properly configured segment + * descriptors. They will retain these configurations (limits, + * writability, etc.) once protected mode is turned off. */ + " mov $0x30, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* Turn off protection (bit 0 in CR0) */ + " movl %cr0, %eax \n" + " andl $0xFFFFFFFE, %eax \n" + " movl %eax, %cr0 \n" + + /* Now really going into real mode */ + " ljmp $0, $__rms_real\n" + "__rms_real: \n" + + /* put the stack at the end of page zero. + * that way we can easily share it between real and protected, + * since the 16-bit ESP at segment 0 will work for any case. + /* Setup a stack */ + " mov $0x0, %ax \n" + " mov %ax, %ss \n" + " movl $0x1000, %eax \n" + " movl %eax, %esp \n" + + /* Load our 16 it idt */ + " xor %ax, %ax \n" + " mov %ax, %ds \n" + " lidt __myidt \n" + + /* Dump zeros in the other segregs */ + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov $0x40, %ax \n" + " mov %ax, %ds \n" + " mov %cx, %ax \n" + + /* run VGA BIOS at 0xc000:0003 */ + " lcall $0xc000, $0x0003\n" + + /* if we got here, just about done. + * Need to get back to protected mode */ + " movl %cr0, %eax \n" + " orl $0x0000001, %eax\n" /* PE = 1 */ + " movl %eax, %cr0 \n" + + /* Now that we are in protected mode jump to a 32 bit code segment. */ + " data32 ljmp $0x10, $vgarestart\n" + "vgarestart:\n" + " .code32\n" + " movw $0x18, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* restore proper gdt and idt */ + " lgdt %cs:gdtarg \n" + " lidt idtarg \n" + + ".globl vga_exit \n" + "vga_exit: \n" + " mov __stack, %esp \n" + " popal \n" + ); +} + +__asm__ (".text\n""real_mode_switch_end:\n"); +extern char real_mode_switch_end[]; + +/* call vga bios int 10 function 0x4f14 to enable main console + epia-m does not always autosence the main console so forcing it on is good !! */ +void vga_enable_console() +{ + __asm__ __volatile__ ( + /* paranoia -- does ecx get saved? not sure. This is + * the easiest safe thing to do. */ + " pushal \n" + /* save the stack */ + " mov %esp, __stack \n" + + /* load 'our' gdt */ + " lgdt %cs:__mygdtaddr \n" + + /* This configures CS properly for real mode. */ + " ljmp $0x28, $__vga_ec_16bit\n" + "__vga_ec_16bit: \n" + " .code16 \n" + /* 16 bit code from here on... */ + + /* Load the segment registers w/ properly configured segment + * descriptors. They will retain these configurations (limits, + * writability, etc.) once protected mode is turned off. */ + " mov $0x30, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* Turn off protection (bit 0 in CR0) */ + " movl %cr0, %eax \n" + " andl $0xFFFFFFFE, %eax\n" + " movl %eax, %cr0 \n" + + /* Now really going into real mode */ + " ljmp $0, $__vga_ec_real \n" + "__vga_ec_real: \n" + + /* put the stack at the end of page zero. + * that way we can easily share it between real and protected, + * since the 16-bit ESP at segment 0 will work for any case. + /* Setup a stack */ + " mov $0x0, %ax \n" + " mov %ax, %ss \n" + " movl $0x1000, %eax \n" + " movl %eax, %esp \n" + + /* debugging for RGM */ + " mov $0x11, %al \n" + " outb %al, $0x80 \n" + + /* Load our 16 it idt */ + " xor %ax, %ax \n" + " mov %ax, %ds \n" + " lidt __myidt \n" + + /* Dump zeros in the other segregs */ + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + + /* ask bios to enable main console */ + /* set up for int 10 call - values found from X server + * bios call routines */ + " movw $0x4f14,%ax \n" + " movw $0x8003,%bx \n" + " movw $1, %cx \n" + " movw $0, %dx \n" + " movw $0, %di \n" + " int $0x10 \n" + + " movb $0x55, %al \n" + " outb %al, $0x80 \n" + + /* if we got here, just about done. + * Need to get back to protected mode */ + " movl %cr0, %eax \n" + " orl $0x0000001, %eax\n" /* PE = 1 */ + " movl %eax, %cr0 \n" + + /* Now that we are in protected mode jump to a 32 bit code segment. */ + " data32 ljmp $0x10, $vga_ec_restart\n" + "vga_ec_restart:\n" + " .code32\n" + " movw $0x18, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* restore proper gdt and idt */ + " lgdt %cs:gdtarg \n" + " lidt idtarg \n" + " .globl vga__ec_exit \n" + "vga_ec_exit:\n" + " mov __stack, %esp \n" + " popal\n" + ); +} + +void do_vgabios(void) +{ + device_t dev; + unsigned long busdevfn; + unsigned int rom = 0; + unsigned char *buf; + unsigned int size = 64*1024; + int i; + + /* clear vga bios data area */ + for (i = 0x400; i < 0x500; i++) { + *(unsigned char *) i = 0; + } + + dev = dev_find_class(PCI_CLASS_DISPLAY_VGA<<8 , 0); + + if (!dev) { + printk_debug("NO VGA FOUND\n"); + return; + } + printk_debug("found VGA: vid=%x, did=%x\n", dev->vendor, dev->device); + + /* declare rom address here - keep any config data out of the way + * of core LXB stuff */ + + rom = 0xfff80000; + pci_write_config32(dev, PCI_ROM_ADDRESS, rom|1); + printk_debug("rom base, size: %x\n", rom); + + buf = (unsigned char *) rom; + if ((buf[0] == 0x55) && (buf[1] == 0xaa)) { + memcpy((void *) 0xc0000, buf, size); + + write_protect_vgabios(); // in northbridge + + // check signature again + buf = (unsigned char *) 0xc0000; + if (buf[0]==0x55 && buf[1]==0xAA) { + busdevfn = (dev->bus->secondary << 8) | dev->path.u.pci.devfn; + printk_debug("bus/devfn = %#x\n", busdevfn); + + real_mode_switch_call_vga(busdevfn); + } else + printk_debug("Failed to copy VGA BIOS to 0xc0000\n"); + } else + printk_debug("BAD SIGNATURE 0x%x 0x%x\n", buf[0], buf[1]); + + pci_write_config32(dev, PCI_ROM_ADDRESS, 0); +} + + +// we had hoped to avoid this. +// this is a stub IDT only. It's main purpose is to ignore calls +// to the BIOS. +// no longer. Dammit. We have to respond to these. +struct realidt { + unsigned short offset, cs; +}; + +// from a handy writeup that andrey found. + +// handler. +// There are some assumptions we can make here. +// First, the Top Of Stack (TOS) is located on the top of page zero. +// we can share this stack between real and protected mode. +// that simplifies a lot of things ... +// we'll just push all the registers on the stack as longwords, +// and pop to protected mode. +// second, since this only ever runs as part of coreboot, +// we know all the segment register values -- so we don't save any. +// keep the handler that calls things small. It can do a call to +// more complex code in coreboot itself. This helps a lot as we don't +// have to do address fixup in this little stub, and calls are absolute +// so the handler is relocatable. +void handler(void) +{ + __asm__ __volatile__ ( + " .code16 \n" + "idthandle: \n" + " pushal \n" + " movb $0, %al \n" + " ljmp $0, $callbiosint16\n" + "end_idthandle: \n" + " .code32 \n" + ); +} + +void debughandler(void) +{ + __asm__ __volatile__ ( + " .code16 \n" + "debughandle: \n" + " pushw %cx \n" + " movw $250, %cx \n" + "dbh1: \n" + " loop dbh1 \n" + " popw %cx \n" + " iret \n" + "end_debughandle: \n" + ".code32 \n" + ); +} + +// Calling conventions. The first C function is called with this stuff +// on the stack. They look like value parameters, but note that if you +// modify them they will go back to the INTx function modified. +// the C function will call the biosint function with these as +// REFERENCE parameters. In this way, we can easily get +// returns back to the INTx caller (i.e. vgabios) +void callbiosint(void) +{ + __asm__ __volatile__ ( + " .code16 \n" + "callbiosint16: \n" + " push %ds \n" + " push %es \n" + " push %fs \n" + " push %gs \n" + // clean up the int #. To save space we put it in the lower + // byte. But the top 24 bits are junk. + " andl $0xff, %eax\n" + // this push does two things: + // - put the INT # on the stack as a parameter + // - provides us with a temp for the %cr0 mods. + " pushl %eax \n" + " movl %cr0, %eax\n" + " orl $0x00000001, %eax\n" /* PE = 1 */ + " movl %eax, %cr0\n" + /* Now that we are in protected mode jump to a 32 bit code segment. */ + " data32 ljmp $0x10, $biosprotect\n" + "biosprotect: \n" + " .code32 \n" + " movw $0x18, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + " lidt idtarg \n" + " call biosint \n" + // back to real mode ... + " ljmp $0x28, $__rms_16bit2\n" + "__rms_16bit2: \n" + " .code16 \n" + /* 16 bit code from here on... */ + /* Load the segment registers w/ properly configured segment + * descriptors. They will retain these configurations (limits, + * writability, etc.) once protected mode is turned off. */ + " mov $0x30, %ax \n" + " mov %ax, %ds \n" + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov %ax, %ss \n" + + /* Turn off protection (bit 0 in CR0) */ + " movl %cr0, %eax \n" + " andl $0xFFFFFFFE, %eax \n" + " movl %eax, %cr0 \n" + + /* Now really going into real mode */ + " ljmp $0, $__rms_real2 \n" + "__rms_real2: \n" + + /* Setup a stack + * FixME: where is esp? */ + " mov $0x0, %ax \n" + " mov %ax, %ss \n" + + /* ebugging for RGM */ + " mov $0x11, %al \n" + " outb %al, $0x80 \n" + + /* Load our 16 it idt */ + " xor %ax, %ax \n" + " mov %ax, %ds \n" + " lidt __myidt \n" + + /* Dump zeros in the other segregs */ + " mov %ax, %es \n" + " mov %ax, %fs \n" + " mov %ax, %gs \n" + " mov $0x40, %ax \n" + " mov %ax, %ds \n" + + /* pop the INT # that you pushed earlier */ + " popl %eax \n" + " pop %gs \n" + " pop %fs \n" + " pop %es \n" + " pop %ds \n" + " popal \n" + " iret \n" + " .code32 \n" + ); +} + +enum { + PCIBIOS = 0x1a, + MEMSIZE = 0x12 +}; + +int pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, + unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, + unsigned long *pecx, unsigned long *peax, unsigned long *pflags); + +int handleint21(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, + unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, + unsigned long *pecx, unsigned long *peax, unsigned long *pflags + ); + +extern void vga_exit(void); + +int biosint(unsigned long intnumber, + unsigned long gsfs, unsigned long dses, + unsigned long edi, unsigned long esi, + unsigned long ebp, unsigned long esp, + unsigned long ebx, unsigned long edx, + unsigned long ecx, unsigned long eax, + unsigned long cs_ip, unsigned short stackflags) +{ + unsigned long ip; + unsigned long cs; + unsigned long flags; + int ret = -1; + + ip = cs_ip & 0xffff; + cs = cs_ip >> 16; + flags = stackflags; + + printk_debug("biosint: INT# 0x%lx\n", intnumber); + printk_debug("biosint: eax 0x%lx ebx 0x%lx ecx 0x%lx edx 0x%lx\n", + eax, ebx, ecx, edx); + printk_debug("biosint: ebp 0x%lx esp 0x%lx edi 0x%lx esi 0x%lx\n", + ebp, esp, edi, esi); + printk_debug("biosint: ip 0x%x cs 0x%x flags 0x%x\n", + ip, cs, flags); + + // cases in a good compiler are just as good as your own tables. + switch (intnumber) { + case 0 ... 15: + // These are not BIOS service, but the CPU-generated exceptions + printk_info("biosint: Oops, exception %u\n", intnumber); + if (esp < 0x1000) { + printk_debug("Stack contents: "); + while (esp < 0x1000) { + printk_debug("0x%04x ", *(unsigned short *) esp); + esp += 2; + } + printk_debug("\n"); + } + printk_debug("biosint: Bailing out\n"); + // "longjmp" + vga_exit(); + break; + + case PCIBIOS: + ret = pcibios( &edi, &esi, &ebp, &esp, + &ebx, &edx, &ecx, &eax, &flags); + break; + case MEMSIZE: + // who cares. + eax = 64 * 1024; + ret = 0; + break; + case 0x15: + ret=handleint21( &edi, &esi, &ebp, &esp, + &ebx, &edx, &ecx, &eax, &flags); + break; + default: + printk_info("BIOSINT: Unsupport int #0x%x\n", + intnumber); + break; + } + if (ret) + flags |= 1; // carry flags + else + flags &= ~1; + stackflags = flags; + return ret; +} + + +void setup_realmode_idt(void) +{ + extern unsigned char idthandle, end_idthandle; + extern unsigned char debughandle, end_debughandle; + + int i; + struct realidt *idts = (struct realidt *) 0; + int codesize = &end_idthandle - &idthandle; + unsigned char *intbyte, *codeptr; + + // for each int, we create a customized little handler + // that just pushes %ax, puts the int # in %al, + // then calls the common interrupt handler. + // this necessitated because intel didn't know much about + // architecture when they did the 8086 (it shows) + // (hmm do they know anymore even now :-) + // obviously you can see I don't really care about memory + // efficiency. If I did I would probe back through the stack + // and get it that way. But that's really disgusting. + for (i = 0; i < 256; i++) { + idts[i].cs = 0; + codeptr = (char*) 4096 + i * codesize; + idts[i].offset = (unsigned) codeptr; + memcpy(codeptr, &idthandle, codesize); + intbyte = codeptr + 3; + *intbyte = i; + } + + // fixed entry points + + // VGA BIOSes tend to hardcode f000:f065 as the previous handler of + // int10. + // calling convention here is the same as INTs, we can reuse + // the int entry code. + codeptr = (char*) 0xff065; + memcpy(codeptr, &idthandle, codesize); + intbyte = codeptr + 3; + *intbyte = 0x42; /* int42 is the relocated int10 */ + + /* debug handler - useful to set a programmable delay between instructions if the + TF bit is set upon call to real mode */ + idts[1].cs = 0; + idts[1].offset = 16384; + memcpy(16384, &debughandle, &end_debughandle - &debughandle); + + +} + + + +enum { + CHECK = 0xb001, + FINDDEV = 0xb102, + READCONFBYTE = 0xb108, + READCONFWORD = 0xb109, + READCONFDWORD = 0xb10a, + WRITECONFBYTE = 0xb10b, + WRITECONFWORD = 0xb10c, + WRITECONFDWORD = 0xb10d +}; + +// errors go in AH. Just set these up so that word assigns +// will work. KISS. +enum { + PCIBIOS_NODEV = 0x8600, + PCIBIOS_BADREG = 0x8700 +}; + +int +pcibios(unsigned long *pedi, unsigned long *pesi, unsigned long *pebp, + unsigned long *pesp, unsigned long *pebx, unsigned long *pedx, + unsigned long *pecx, unsigned long *peax, unsigned long *pflags) +{ + unsigned long edi = *pedi; + unsigned long esi = *pesi; + unsigned long ebp = *pebp; + unsigned long esp = *pesp; + unsigned long ebx = *pebx; + unsigned long edx = *pedx; + unsigned long ecx = *pecx; + unsigned long eax = *peax; + unsigned long flags = *pflags; + unsigned short func = (unsigned short) eax; + int retval = 0; + unsigned short devid, vendorid, devfn; + short devindex; /* Use short to get rid of garbage in upper half of 32-bit register */ + unsigned char bus; + device_t dev; + + switch(func) { + case CHECK: + *pedx = 0x4350; + *pecx = 0x2049; + retval = 0; + break; + case FINDDEV: + { + devid = *pecx; + vendorid = *pedx; + devindex = *pesi; + dev = 0; + while ((dev = dev_find_device(vendorid, devid, dev))) { + if (devindex <= 0) + break; + devindex--; + } + if (dev) { + unsigned short busdevfn; + *peax = 0; + // busnum is an unsigned char; + // devfn is an int, so we mask it off. + busdevfn = (dev->bus->secondary << 8) + | (dev->path.u.pci.devfn & 0xff); + printk_debug("0x%x: return 0x%x\n", func, busdevfn); + *pebx = busdevfn; + retval = 0; + } else { + *peax = PCIBIOS_NODEV; + retval = -1; + } + } + break; + case READCONFDWORD: + case READCONFWORD: + case READCONFBYTE: + case WRITECONFDWORD: + case WRITECONFWORD: + case WRITECONFBYTE: + { + unsigned long dword; + unsigned short word; + unsigned char byte; + unsigned char reg; + + devfn = *pebx & 0xff; + bus = *pebx >> 8; + reg = *pedi; + dev = dev_find_slot(bus, devfn); + if (! dev) { + printk_debug("0x%x: BAD DEVICE bus %d devfn 0x%x\n", func, bus, devfn); + // idiots. the pcibios guys assumed you'd never pass a bad bus/devfn! + *peax = PCIBIOS_BADREG; + retval = -1; + } + switch(func) { + case READCONFBYTE: + byte = pci_read_config8(dev, reg); + *pecx = byte; + break; + case READCONFWORD: + word = pci_read_config16(dev, reg); + *pecx = word; + break; + case READCONFDWORD: + dword = pci_read_config32(dev, reg); + *pecx = dword; + break; + case WRITECONFBYTE: + byte = *pecx; + pci_write_config8(dev, reg, byte); + break; + case WRITECONFWORD: + word = *pecx; + pci_write_config16(dev, reg, word); + break; + case WRITECONFDWORD: + dword = *pecx; + pci_write_config32(dev, reg, dword); + break; + } + + if (retval) + retval = PCIBIOS_BADREG; + printk_debug("0x%x: bus %d devfn 0x%x reg 0x%x val 0x%lx\n", + func, bus, devfn, reg, *pecx); + *peax = 0; + retval = 0; + } + break; + default: + printk_err("UNSUPPORTED PCIBIOS FUNCTION 0x%x\n", func); + break; + } + + return retval; +} + +int handleint21(unsigned long *edi, unsigned long *esi, unsigned long *ebp, + unsigned long *esp, unsigned long *ebx, unsigned long *edx, + unsigned long *ecx, unsigned long *eax, unsigned long *flags) +{ + int res=-1; + switch(*eax&0xffff) + { + case 0x5f19: + break; + case 0x5f18: + *eax=0x5f; + *ebx=0x545; // MCLK = 133, 32M frame buffer, 256 M main memory + *ecx=0x060; + res=0; + break; + case 0x5f00: + *eax = 0x8600; + break; + case 0x5f01: + *eax = 0x5f; + *ecx = (*ecx & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768 + res = 0; + break; + case 0x5f02: + *eax=0x5f; + *ebx= (*ebx & 0xffff0000) | 2; + *ecx= (*ecx & 0xffff0000) | 0x401; // PAL + crt only + *edx= (*edx & 0xffff0000) | 0; // TV Layout - default + res=0; + break; + case 0x5f0f: + *eax=0x860f; + break; + } + return res; +} diff --git a/src/northbridge/via/cn700/vgachip.h b/src/northbridge/via/cn700/vgachip.h new file mode 100644 index 0000000000..0a5e631465 --- /dev/null +++ b/src/northbridge/via/cn700/vgachip.h @@ -0,0 +1,30 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +#ifndef _PC80_VGABIOS +#define _PC80_VGABIOS + +extern struct chip_control pc80_vgabios_control; + +struct pc80_vgabios_config { + int nothing; +}; + +#endif /* _PC80_VGABIOS */ |