openbios/drivers/pci.c

/*
 *   OpenBIOS pci driver
 *
 *   This driver is compliant to the
 *   PCI bus binding to IEEE 1275-1994 Rev 2.1
 *
 *   (C) 2004 Stefan Reinauer <stepan@openbios.org>
 *   (C) 2005 Ed Schouten <ed@fxq.nl>
 *
 *   Some parts from OpenHackWare-0.4, Copyright (c) 2004-2005 Jocelyn Mayer
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   version 2
 *
 */

#include "openbios/config.h"
#include "openbios/bindings.h"
#include "openbios/kernel.h"
#include "openbios/pci.h"
#include "libc/byteorder.h"
#include "libc/vsprintf.h"

#include "openbios/drivers.h"
#include "video_subr.h"
#include "timer.h"
#include "pci.h"
#include "pci_database.h"
#include "cuda.h"

#define set_bool_property(ph, name) set_property(ph, name, NULL, 0);

/* DECLARE data structures for the nodes.  */

DECLARE_UNNAMED_NODE( ob_pci_node, INSTALL_OPEN, 2*sizeof(int) );

const pci_arch_t *arch;

static void
ob_pci_open(int *idx)
{
	int ret=1;
	RET ( -ret );
}

static void
ob_pci_close(int *idx)
{
	selfword("close-deblocker");
}

static void
ob_pci_initialize(int *idx)
{
}


NODE_METHODS(ob_pci_node) = {
	{ NULL,			ob_pci_initialize	},
	{ "open",		ob_pci_open		},
	{ "close",		ob_pci_close		},
};

int ide_config_cb2 (const pci_config_t *config)
{
	ob_ide_init(config->path,
		    config->regions[0] & ~0x0000000F,
		    config->regions[1] & ~0x0000000F,
		    config->regions[2] & ~0x0000000F,
		    config->regions[3] & ~0x0000000F);
	return 0;
}

int eth_config_cb (const pci_config_t *config)
{
	phandle_t ph;
	cell props[12];
	int i;

	ph = find_dev(config->path);

	set_property(ph, "network-type", "ethernet", 9);
	set_property(ph, "removable", "network", 8);
	set_property(ph, "category", "net", 4);

	for (i = 0; i < 7; i++)
	{
		props[i*2] = config->regions[i];
		props[i*2 + 1] = config->sizes[i];
	}
        set_property(ph, "reg", (char *)props, i * 2 * sizeof(cell));
        return 0;
}

phandle_t pic_handle;
int macio_config_cb (const pci_config_t *config)
{
#ifdef CONFIG_PPC
	char buf[64];
	phandle_t ph;
        cell props[2];

        snprintf(buf, sizeof(buf), "%s/interrupt-controller", config->path);
	REGISTER_NAMED_NODE(ob_pci_node, buf);

	ph = find_dev(buf);
	set_property(ph, "device_type", "interrupt-controller", 21);
	set_property(ph, "compatible", "heathrow\0mac-risc", 18);
	set_int_property(ph, "#interrupt-cells", 1);
	props[0]= 0x10;
	props[1]= 0x20;
        set_property(ph, "reg", (char *)&props, sizeof(props));
	pic_handle = ph;

	cuda_init(config->path, config->regions[0]);
	macio_nvram_init(config->path, config->regions[0]);
#endif
	return 0;
}

int vga_config_cb (const pci_config_t *config)
{
	if (config->regions[0] != 0x00000000)
		vga_vbe_init(config->path, config->regions[0], config->sizes[0],
			     config->regions[1], config->sizes[1]);
	return 0;
}

static void ob_pci_add_properties(pci_addr addr, const pci_dev_t *pci_dev,
                                  const pci_config_t *config)
{
	phandle_t dev=get_cur_dev();
	int status,id;
	uint16_t vendor_id, device_id;
	uint8_t rev;

	vendor_id = pci_config_read16(addr, PCI_VENDOR_ID);
	device_id = pci_config_read16(addr, PCI_DEVICE_ID);
	rev = pci_config_read8(addr, PCI_REVISION_ID);

	/* create properties as described in 2.5 */

	set_int_property(dev, "vendor-id", vendor_id);
	set_int_property(dev, "device-id", device_id);
	set_int_property(dev, "revision-id", rev);

	set_int_property(dev, "interrupts",
			pci_config_read8(addr, PCI_INTERRUPT_LINE));

	set_int_property(dev, "min-grant", pci_config_read8(addr, PCI_MIN_GNT));
	set_int_property(dev, "max-latency", pci_config_read8(addr, PCI_MAX_LAT));

	status=pci_config_read16(addr, PCI_STATUS);

	set_int_property(dev, "devsel-speed",
			(status&PCI_STATUS_DEVSEL_MASK)>>10);

	if(status&PCI_STATUS_FAST_BACK)
		set_bool_property(dev, "fast-back-to-back");
	if(status&PCI_STATUS_66MHZ)
		set_bool_property(dev, "66mhz-capable");
	if(status&PCI_STATUS_UDF)
		set_bool_property(dev, "udf-supported");

	id=pci_config_read16(addr, PCI_SUBSYSTEM_VENDOR_ID);
	if(id)
		set_int_property(dev, "subsystem-vendor-id", id);
	id=pci_config_read16(addr, PCI_SUBSYSTEM_ID);
	if(id)
		set_int_property(dev, "subsystem-id", id);

	set_int_property(dev, "cache-line-size",
			pci_config_read16(addr, PCI_CACHE_LINE_SIZE));

	if (pci_dev->type) {
		push_str(pci_dev->type);
		fword("encode-string");
		push_str("device_type");
		fword("property");
	}
	if (pci_dev->model) {
		push_str(pci_dev->model);
		fword("encode-string");
		push_str("model");
		fword("property");
	}
	if (pci_dev->compat)
		set_property(dev, "compatible",
			     pci_dev->compat, pci_compat_len(pci_dev));
	push_str(pci_dev->name);
	fword("encode-string");
	push_str("class");
	fword("property");
	if (pci_dev->config_cb)
		pci_dev->config_cb(config);
}


static void ob_pci_add_reg(pci_addr addr)
{
	PUSH(0);
	PUSH(0);
	PUSH(addr&(~arch->cfg_base));
	fword("pci-addr-encode");
	PUSH(0);
	PUSH(0);
	fword("pci-len-encode");
	fword("encode+");
	push_str("reg");
	fword("property");
}

#ifdef CONFIG_XBOX
static char pci_xbox_blacklisted (int bus, int devnum, int fn)
{
	/*
	 * The Xbox MCPX chipset is a derivative of the nForce 1
	 * chipset. It almost has the same bus layout; some devices
	 * cannot be used, because they have been removed.
	 */

	/*
	 * Devices 00:00.1 and 00:00.2 used to be memory controllers on
	 * the nForce chipset, but on the Xbox, using them will lockup
	 * the chipset.
	 */
	if ((bus == 0) && (devnum == 0) && ((fn == 1) || (fn == 2)))
		return 1;

	/*
	 * Bus 1 only contains a VGA controller at 01:00.0. When you try
	 * to probe beyond that device, you only get garbage, which
	 * could cause lockups.
	 */
	if ((bus == 1) && ((devnum != 0) || (fn != 0)))
		return 1;

	/*
	 * Bus 2 used to contain the AGP controller, but the Xbox MCPX
	 * doesn't have one. Probing it can cause lockups.
	 */
	if (bus >= 2)
		return 1;

	/*
	 * The device is not blacklisted.
	 */
	return 0;
}
#endif

static void
ob_pci_configure(pci_addr addr, pci_config_t *config, unsigned long *mem_base,
                 unsigned long *io_base)

{
	uint32_t smask, omask, amask, size, reloc, min_align;
        unsigned long base;
	pci_addr config_addr;
	int reg;

	omask = 0x00000000;
	for (reg = 0; reg < 7; reg++) {

		config->regions[reg] = 0x00000000;
		config->sizes[reg] = 0x00000000;

		if ((omask & 0x0000000f) == 0x4) {
			/* 64 bits memory mapping */
			continue;
		}

		if (reg == 6)
			config_addr = PCI_ROM_ADDRESS;
		else
			config_addr = PCI_BASE_ADDR_0 + reg * 4;

		/* get region size */

		pci_config_write32(addr, config_addr, 0xffffffff);
		smask = pci_config_read32(addr, config_addr);
		if (smask == 0x00000000 || smask == 0xffffffff)
			continue;

		if (smask & 0x00000001 && reg != 6) {
			/* I/O space */
			base = *io_base;
			min_align = 1 << 7;
			amask = 0x00000001;
			pci_config_write16(addr, PCI_COMMAND,
					   pci_config_read16(addr,
					   		     PCI_COMMAND) |
							     PCI_COMMAND_IO);
		} else {
			/* Memory Space */
			base = *mem_base;
			min_align = 1 << 16;
			amask = 0x0000000F;
			if (reg == 6) {
				smask |= 1; /* ROM */
			}
			pci_config_write16(addr, PCI_COMMAND,
					   pci_config_read16(addr,
					   		    PCI_COMMAND) |
							    PCI_COMMAND_MEMORY);
		}
		omask = smask & amask;
		smask &= ~amask;
		size = (~smask) + 1;
		config->sizes[reg] = size;
		reloc = base;
		if (size < min_align)
			size = min_align;
		reloc = (reloc + size -1) & ~(size - 1);
		if (*io_base == base) {
			*io_base = reloc + size;
			reloc -= arch->io_base;
		} else {
			*mem_base = reloc + size;
		}
		pci_config_write32(addr, config_addr, reloc | omask);
		config->regions[reg] = reloc;
	}
}

static void ob_scan_pci_bus(int bus, unsigned long *mem_base,
                            unsigned long *io_base, const char *path)
{
	int devnum, fn, is_multi, vid, did;
	unsigned int htype;
	pci_addr addr;
	phandle_t dnode, dbus;
	pci_config_t config;
        const pci_dev_t *pci_dev;
	uint32_t ccode;
	uint8_t class, subclass, iface, rev;

	for (devnum = 0; devnum < 32; devnum++) {
		is_multi = 0;
		for (fn = 0; fn==0 || (is_multi && fn<8); fn++) {
#ifdef CONFIG_XBOX
			if (pci_xbox_blacklisted (bus, devnum, fn))
				continue;
#endif
			addr = PCI_ADDR(bus, devnum, fn);
			vid = pci_config_read16(addr, PCI_VENDOR_ID);
			did = pci_config_read16(addr, PCI_DEVICE_ID);

			if (vid==0xffff || vid==0)
				continue;

			ccode = pci_config_read16(addr, PCI_CLASS_DEVICE);
			class = ccode >> 8;
			subclass = ccode;
			iface = pci_config_read8(addr, PCI_CLASS_PROG);
			rev = pci_config_read8(addr, PCI_REVISION_ID);

			pci_dev = pci_find_device(class, subclass, iface, vid, did);

#ifdef CONFIG_DEBUG_PCI
			printk("%x:%x.%x - %x:%x - ", bus, devnum, fn,
					vid, did);
#endif
			htype = pci_config_read8(addr, PCI_HEADER_TYPE);
			if (fn == 0)
				is_multi = htype & 0x80;

			activate_device(path);

			dbus=get_cur_dev();
			if (pci_dev == NULL || pci_dev->name == NULL)
                            snprintf(config.path, sizeof(config.path),
                                     "%s/pci%x,%x", path, vid, did);
			else
                            snprintf(config.path, sizeof(config.path),
                                     "%s/%s", path, pci_dev->name);
#ifdef CONFIG_DEBUG_PCI
			printk("%s - ", config.path);
#endif
			REGISTER_NAMED_NODE(ob_pci_node, config.path);
			dnode=find_dev(config.path);
			activate_dev( dnode );
                        ob_pci_configure(addr, &config, mem_base, io_base);
{
	int irq_pin, irq_line;
	static const uint8_t heathrow_pci_irqs[4] = { 0x15, 0x16, 0x17, 0x18 };
	irq_pin = pci_config_read8(addr, PCI_INTERRUPT_PIN);
	if (irq_pin > 0) {
		irq_pin = (devnum + irq_pin - 1) & 3;
		irq_line = heathrow_pci_irqs[irq_pin];
	}
}
			ob_pci_add_properties(addr, pci_dev, &config);
			ob_pci_add_reg(addr);
			device_end();

		}
	}
}

int ob_pci_init(void)
{
        int bus;
        unsigned long mem_base, io_base;

#ifdef CONFIG_DEBUG_PCI
	printk("Initializing PCI devices...\n");
#endif

	/* brute force bus scan */

	/* Find all PCI bridges */

	mem_base = arch->mem_base;
	io_base = arch->io_base;
	for (bus = 0; bus<0x100; bus++) {
		ob_scan_pci_bus(bus, &mem_base, &io_base, "/pci");
	}
	return 0;
}