Initial revision

1 files changed, 503 insertions, 0 deletions

diff --git a/drivers/pci.c b/drivers/pci.c
new file mode 100644
index 0000000..52584ce
--- /dev/null
+++ b/drivers/pci.c
@@ -0,0 +1,503 @@
+/*
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+/*
+ * PCI routines
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_PCI
+
+#include <command.h>
+#include <cmd_boot.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <pci.h>
+
+#ifdef DEBUG
+#define DEBUGF(x...) printf(x)
+#else
+#define DEBUGF(x...)
+#endif /* DEBUG */
+
+/*
+ *
+ */
+
+#define PCI_HOSE_OP(rw, size, type)						\
+int pci_hose_##rw##_config_##size(struct pci_controller *hose, 			\
+				  pci_dev_t dev, 				\
+				  int offset, type value)			\
+{										\
+	return hose->rw##_##size(hose, dev, offset, value);			\
+}
+
+PCI_HOSE_OP(read, byte, u8 *)
+PCI_HOSE_OP(read, word, u16 *)
+PCI_HOSE_OP(read, dword, u32 *)
+PCI_HOSE_OP(write, byte, u8)
+PCI_HOSE_OP(write, word, u16)
+PCI_HOSE_OP(write, dword, u32)
+
+#define PCI_OP(rw, size, type, error_code)					\
+int pci_##rw##_config_##size(pci_dev_t dev, int offset, type value)		\
+{										\
+	struct pci_controller *hose = pci_bus_to_hose(PCI_BUS(dev));		\
+										\
+	if (!hose)								\
+	{									\
+		error_code;							\
+		return -1;							\
+	}									\
+										\
+	return pci_hose_##rw##_config_##size(hose, dev, offset, value);		\
+}
+
+PCI_OP(read, byte, u8 *, *value = 0xff)
+PCI_OP(read, word, u16 *, *value = 0xffff)
+PCI_OP(read, dword, u32 *, *value = 0xffffffff)
+PCI_OP(write, byte, u8, )
+PCI_OP(write, word, u16, )
+PCI_OP(write, dword, u32, )
+
+#define PCI_READ_VIA_DWORD_OP(size, type, off_mask)				\
+int pci_hose_read_config_##size##_via_dword(struct pci_controller *hose,	\
+					pci_dev_t dev, 				\
+					int offset, type val)			\
+{										\
+	u32 val32;								\
+										\
+	if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)	\
+		return -1;							\
+										\
+	*val = (val32 >> ((offset & (int)off_mask) * 8));			\
+										\
+	return 0;								\
+}
+
+#define PCI_WRITE_VIA_DWORD_OP(size, type, off_mask, val_mask)			\
+int pci_hose_write_config_##size##_via_dword(struct pci_controller *hose,	\
+					     pci_dev_t dev, 			\
+					     int offset, type val)		\
+{										\
+	u32 val32, mask, ldata;							\
+										\
+	if (pci_hose_read_config_dword(hose, dev, offset & 0xfc, &val32) < 0)	\
+		return -1;							\
+										\
+	mask = val_mask;							\
+	ldata = (((unsigned long)val) & mask) << ((offset & (int)off_mask) * 8);\
+	mask <<= ((mask & (int)off_mask) * 8);					\
+	val32 = (val32 & ~mask) | ldata;					\
+										\
+	if (pci_hose_write_config_dword(hose, dev, offset & 0xfc, val32) < 0)	\
+		return -1;							\
+										\
+	return 0;								\
+}
+
+PCI_READ_VIA_DWORD_OP(byte, u8 *, 0x03)
+PCI_READ_VIA_DWORD_OP(word, u16 *, 0x02)
+PCI_WRITE_VIA_DWORD_OP(byte, u8, 0x03, 0x000000ff)
+PCI_WRITE_VIA_DWORD_OP(word, u16, 0x02, 0x0000ffff)
+
+/*
+ *
+ */
+
+static struct pci_controller* hose_head = NULL;
+
+void pci_register_hose(struct pci_controller* hose)
+{
+	struct pci_controller **phose = &hose_head;
+
+	while(*phose)
+		phose = &(*phose)->next;
+
+	hose->next = NULL;
+
+	*phose = hose;
+}
+
+struct pci_controller* pci_bus_to_hose(int bus)
+{
+	struct pci_controller *hose;
+
+	for (hose = hose_head; hose; hose = hose->next)
+		if (bus >= hose->first_busno &&
+		    bus <= hose->last_busno)
+			return hose;
+
+	return NULL;
+}
+
+pci_dev_t pci_find_devices(struct pci_device_id *ids, int index)
+{
+	struct pci_controller * hose;
+	u16 vendor, device;
+	u8 header_type;
+	pci_dev_t bdf;
+	int i, bus, found_multi = 0;
+
+	for (hose = hose_head; hose; hose = hose->next)
+	{
+#if CFG_SCSI_SCAN_BUS_REVERSE
+		for (bus = hose->last_busno; bus >= hose->first_busno; bus--)
+#else
+		for (bus = hose->first_busno; bus <= hose->last_busno; bus++)
+#endif
+			for (bdf = PCI_BDF(bus,0,0);
+#ifdef CONFIG_ELPPC
+			     bdf < PCI_BDF(bus,PCI_MAX_PCI_DEVICES-1,PCI_MAX_PCI_FUNCTIONS-1);
+#else
+			     bdf < PCI_BDF(bus+1,0,0);
+#endif
+			     bdf += PCI_BDF(0,0,1))
+			{
+				if (!PCI_FUNC(bdf))
+				{
+					pci_read_config_byte(bdf,
+							     PCI_HEADER_TYPE,
+							     &header_type);
+
+					found_multi = header_type & 0x80;
+				}
+				else
+				{
+					if (!found_multi)
+						continue;
+				}
+
+				pci_read_config_word(bdf,
+						     PCI_VENDOR_ID,
+						     &vendor);
+				pci_read_config_word(bdf,
+						     PCI_DEVICE_ID,
+						     &device);
+
+				for (i=0; ids[i].vendor != 0; i++)
+					if (vendor == ids[i].vendor &&
+					    device == ids[i].device)
+					{
+						if (index <= 0)
+							return bdf;
+
+						index--;
+					}
+			}
+	}
+
+	return (-1);
+}
+
+pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
+{
+	static struct pci_device_id ids[2] = {{}, {0, 0}};
+
+	ids[0].vendor = vendor;
+	ids[0].device = device;
+
+	return pci_find_devices(ids, index);
+}
+
+/*
+ *
+ */
+
+unsigned long pci_hose_phys_to_bus(struct pci_controller* hose,
+				   unsigned long phys_addr,
+				   unsigned long flags)
+{
+	struct pci_region *res;
+	unsigned long bus_addr;
+	int i;
+
+	if (!hose)
+	{
+		printf("pci_hose_phys_to_bus: %s\n", "invalid hose");
+		goto Done;
+	}
+
+	for (i=0; i<hose->region_count; i++)
+	{
+		res = &hose->regions[i];
+
+		if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
+			continue;
+
+		bus_addr = phys_addr - res->phys_start + res->bus_start;
+
+		if (bus_addr >= res->bus_start &&
+		    bus_addr <  res->bus_start + res->size)
+		{
+			return bus_addr;
+		}
+	}
+
+	printf("pci_hose_phys_to_bus: %s\n", "invalid physical address");
+
+ Done:
+	return 0;
+}
+
+unsigned long pci_hose_bus_to_phys(struct pci_controller* hose,
+				   unsigned long bus_addr,
+				   unsigned long flags)
+{
+	struct pci_region *res;
+	int i;
+
+	if (!hose)
+	{
+		printf("pci_hose_bus_to_phys: %s\n", "invalid hose");
+		goto Done;
+	}
+
+	for (i=0; i<hose->region_count; i++)
+	{
+		res = &hose->regions[i];
+
+		if (((res->flags ^ flags) & PCI_REGION_TYPE) != 0)
+			continue;
+
+		if (bus_addr >= res->bus_start &&
+		    bus_addr <  res->bus_start + res->size)
+		{
+			return bus_addr - res->bus_start + res->phys_start;
+		}
+	}
+
+	printf("pci_hose_bus_to_phys: %s\n", "invalid physical address");
+
+ Done:
+	return 0;
+}
+
+/*
+ *
+ */
+
+int pci_hose_config_device(struct pci_controller *hose,
+			   pci_dev_t dev,
+			   unsigned long io,
+			   unsigned long mem,
+			   unsigned long command)
+{
+	unsigned int bar_response, bar_size, bar_value, old_command;
+	unsigned char pin;
+	int bar, found_mem64;
+
+	DEBUGF("PCI Config: I/O=0x%lx, Memory=0x%lx, Command=0x%lx\n", io, mem, command);
+
+	pci_hose_write_config_dword(hose, dev, PCI_COMMAND, 0);
+
+	for (bar = PCI_BASE_ADDRESS_0; bar < PCI_BASE_ADDRESS_5; bar += 4)
+	{
+		pci_hose_write_config_dword(hose, dev, bar, 0xffffffff);
+		pci_hose_read_config_dword(hose, dev, bar, &bar_response);
+
+		if (!bar_response)
+			continue;
+
+		found_mem64 = 0;
+
+		/* Check the BAR type and set our address mask */
+		if (bar_response & PCI_BASE_ADDRESS_SPACE)
+		{
+			bar_size = ~(bar_response & PCI_BASE_ADDRESS_IO_MASK) + 1;
+			bar_value = io;
+
+			io = ((io - 1) | (bar_size - 1)) + 1;
+		}
+		else
+		{
+			if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
+			     PCI_BASE_ADDRESS_MEM_TYPE_64)
+				found_mem64 = 1;
+
+			bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+			bar_value = mem;
+
+			mem = ((mem - 1) | (bar_size - 1)) + 1;
+		}
+
+		/* Write it out and update our limit */
+		pci_hose_write_config_dword(hose, dev, bar, bar_value);
+
+		if (found_mem64)
+		{
+			bar += 4;
+			pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
+		}
+	}
+
+	/* Configure Cache Line Size Register */
+	pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
+
+	/* Configure Latency Timer */
+	pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
+
+	/* Disable interrupt line, if device says it wants to use interrupts */
+	pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
+	if (pin != 0)
+	{
+		pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, 0xff);
+	}
+
+	pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &old_command);
+	pci_hose_write_config_dword(hose, dev, PCI_COMMAND,
+				    (old_command & 0xffff0000) | command );
+
+	return 0;
+}
+
+/*
+ *
+ */
+
+struct pci_config_table *pci_find_config(struct pci_controller *hose,
+					 unsigned short class,
+					 unsigned int vendor,
+					 unsigned int device,
+					 unsigned int bus,
+					 unsigned int dev,
+					 unsigned int func)
+{
+	struct pci_config_table *table;
+
+	for (table = hose->config_table; table && table->vendor; table++)
+	{
+		if ((table->vendor == PCI_ANY_ID || table->vendor == vendor) &&
+		    (table->device == PCI_ANY_ID || table->device == device) &&
+		    (table->class  == PCI_ANY_ID || table->class  == class)  &&
+		    (table->bus    == PCI_ANY_ID || table->bus    == bus)    &&
+		    (table->dev    == PCI_ANY_ID || table->dev    == dev)    &&
+		    (table->func   == PCI_ANY_ID || table->func   == func))
+		{
+			return table;
+		}
+	}
+
+	return NULL;
+}
+
+void pci_cfgfunc_config_device(struct pci_controller *hose,
+			       pci_dev_t dev,
+			       struct pci_config_table *entry)
+{
+	pci_hose_config_device(hose, dev, entry->priv[0], entry->priv[1], entry->priv[2]);
+}
+
+void pci_cfgfunc_do_nothing(struct pci_controller *hose,
+			    pci_dev_t dev, struct pci_config_table *entry)
+{
+}
+
+/*
+ *
+ */
+
+extern void pciauto_config_init(struct pci_controller *hose);
+extern void pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);
+
+int pci_hose_scan_bus(struct pci_controller *hose, int bus)
+{
+	unsigned int sub_bus, found_multi=0;
+	unsigned short vendor, device, class;
+	unsigned char header_type;
+	struct pci_config_table *cfg;
+	pci_dev_t dev;
+
+	sub_bus = bus;
+
+	for (dev =  PCI_BDF(bus,0,0);
+	     dev <  PCI_BDF(bus,PCI_MAX_PCI_DEVICES-1,PCI_MAX_PCI_FUNCTIONS-1);
+	     dev += PCI_BDF(0,0,1))
+	{
+#ifndef CONFIG_405GP /* don't skip host bridge on ppc405gp */
+		/* Skip our host bridge */
+		if ( dev == PCI_BDF(hose->first_busno,0,0) )
+			continue;
+#endif
+
+		if (PCI_FUNC(dev) && !found_multi)
+			continue;
+
+		pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE, &header_type);
+
+		pci_hose_read_config_word(hose, dev, PCI_VENDOR_ID, &vendor);
+
+		if (vendor != 0xffff && vendor != 0x0000)
+		{
+
+			if (!PCI_FUNC(dev))
+				found_multi = header_type & 0x80;
+
+			DEBUGF("PCI Scan: Found Bus %d, Device %d, Function %d\n",
+			    PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev) );
+
+			pci_hose_read_config_word(hose, dev, PCI_DEVICE_ID, &device);
+			pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class);
+
+			cfg = pci_find_config(hose, class, vendor, device,
+					      PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev));
+			if (cfg)
+				cfg->config_device(hose, dev, cfg);
+#ifdef CONFIG_PCI_PNP
+			else
+				pciauto_config_device(hose, dev);
+#endif
+			if (hose->fixup_irq)
+				hose->fixup_irq(hose, dev);
+
+#ifdef CONFIG_PCI_SCAN_SHOW
+			/* Skip our host bridge */
+			if ( dev != PCI_BDF(hose->first_busno,0,0) ) {
+			    unsigned char int_line;
+
+			    pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_LINE,
+						      &int_line);
+			    printf("        %02x  %02x  %04x  %04x  %04x  %02x\n",
+				   PCI_BUS(dev), PCI_DEV(dev), vendor, device, class,
+				   int_line);
+			}
+#endif
+		}
+	}
+
+	return sub_bus;
+}
+
+int pci_hose_scan(struct pci_controller *hose)
+{
+#ifdef CONFIG_PCI_PNP
+	pciauto_config_init(hose);
+#endif
+	return pci_hose_scan_bus(hose, hose->first_busno);
+}
+
+#endif /* CONFIG_PCI */