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u-boot/board/MAI/AmigaOneG3SE/articiaS_pci.c
Kumar Gala ff4e66e93c pci: Rename PCI_REGION_MEMORY to PCI_REGION_SYS_MEMORY for clarity 
The PCI_REGION_MEMORY and PCI_REGION_MEM are a bit to similar and
can be confusing when reading the code.

Rename PCI_REGION_MEMORY to PCI_REGION_SYS_MEMORY to clarify its used
for system memory mapping purposes.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2009-02-07 23:50:04 +01:00

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/*
* (C) Copyright 2002
* Hyperion Entertainment, Hans-JoergF@hyperion-entertainment.com
*
* 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
*/
#include <common.h>
#include <pci.h>
#include "memio.h"
#include "articiaS.h"
DECLARE_GLOBAL_DATA_PTR;
#undef ARTICIA_PCI_DEBUG
#ifdef ARTICIA_PCI_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
struct pci_controller articiaS_hose;
long irq_alloc(long wanted);
static pci_dev_t pci_hose_find_class(struct pci_controller *hose, int bus, short find_class, int index);
static int articiaS_init_vga(void);
static void pci_cfgfunc_dummy(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table);
unsigned char pci_irq_alloc(void);
extern void via_cfgfunc_via686(struct pci_controller * host, pci_dev_t dev, struct pci_config_table *table);
extern void via_cfgfunc_ide_init(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table);
extern void via_init_irq_routing(uint8 []);
extern void via_init_afterscan(void);
#define cfgfunc_via686 1
#define cfgfunc_dummy 2
#define cfgfunc_ide_init 3
static struct pci_config_table config_table[] =
{
{
0x1106, PCI_ANY_ID, PCI_CLASS_BRIDGE_ISA, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
(void *)cfgfunc_via686, {0, 0, 0}
},
{
0x1106, PCI_ANY_ID, PCI_ANY_ID, 0,7,4,
(void *)cfgfunc_dummy, {0,0,0}
},
{
0x1106, 0x3068, PCI_ANY_ID, 0, 7, PCI_ANY_ID,
(void *)cfgfunc_dummy, {0,0,0}
},
{
0x1106, PCI_ANY_ID, PCI_ANY_ID, 0,7,1,
(void *)cfgfunc_ide_init, {0,0,0}
},
{
0,
}
};
void pci_cfgfunc_dummy(struct pci_controller *host, pci_dev_t dev, struct pci_config_table *table)
{
}
unsigned long irq_penalties[16] =
{
1000, /* 0:timer */
1000, /* 1:keyboard */
1000, /* 2:cascade */
50, /* 3:serial (COM2) */
50, /* 4:serial (COM1) */
4, /* 5:USB2 */
100, /* 6:floppy */
3, /* 7:parallel */
50, /* 8:AC97/MC97 */
0, /* 9: */
3, /* 10:: */
0, /* 11: */
3, /* 12: USB1 */
0, /* 13: */
100, /* 14: ide0 */
100, /* 15: ide1 */
};
/*
* The following defines a hard-coded interrupt mapping for the
* know devices on the board.
* If a device isn't found here, assumed to be a device that's
* plugged into a PCI or AGP slot
* NOTE: This table is machine dependant.
*/
struct pci_irq_fixup_table
{
uint8 bus; /* Bus number */
uint8 device; /* Device number */
uint8 func; /* Function number */
uint8 interrupt; /* Interrupt to use (0xff to disable) */
};
struct pci_irq_fixup_table fixuptab [] =
{
{ 0, 0, 0, 0xff}, /* Articia S host bridge */
{ 0, 1, 0, 0xff}, /* Articia S AGP bridge */
/* { 0, 6, 0, 0x05}, /###* 3COM ethernet */
{ 0, 7, 0, 0xff}, /* VIA southbridge */
{ 0, 7, 1, 0x0e}, /* IDE controller in legacy mode */
/* { 0, 7, 2, 0x05}, /###* First USB controller */
/* { 0, 7, 3, 0x0c}, /###* Second USB controller (shares interrupt with ethernet) */
{ 0, 7, 4, 0xff}, /* ACPI Power Management */
/* { 0, 7, 5, 0x08}, /###* AC97 */
/* { 0, 7, 6, 0x08}, /###* MC97 */
{ 0xff, 0xff, 0xff, 0xff}
};
/*
* This table maps IRQ's to PCI interrupts
*/
uint8 pci_intmap[4] = {0, 0, 0, 0};
/*
* Map PCI slots to interrupt routings
* This table lists the device number assigned to a card inserted
* into the slot, along with a permutation for the slot's IRQ routing.
* NOTE: This table is machine dependant.
*/
struct pci_slot_irq_routing
{
uint8 bus;
uint8 device;
uint8 ints[4];
};
struct pci_slot_irq_routing amigaone_pci_routing[] =
{
{0, 8, {0, 1, 2, 3}}, /* Slot 1 (left of riser slot) */
{0, 9, {1, 2, 3, 0}}, /* Slot 2 (middle slot) */
{0, 10, {2, 3, 0, 1}}, /* Slot 3 (leftmost slot) */
{1, 0, {1, 0, 2, 3}}, /* AGP slot (only IRQA and IRQB) */
{1, 1, {1, 2, 3, 0}}, /* PCI slot on AGP bus */
{0, 6, {3, 3, 3, 3}}, /* On board ethernet */
{0, 7, {0, 1, 2, 3}}, /* Southbridge */
{0xff, 0, {0, 0, 0, 0}}
};
void articiaS_pci_irq_init(void)
{
char *s;
s = getenv("pci_irqa");
if (s)
pci_intmap[0] = simple_strtoul (s, NULL, 10);
else
pci_intmap[0] = pci_irq_alloc();
s = getenv("pci_irqb");
if (s)
pci_intmap[1] = simple_strtoul (s, NULL, 10);
else
pci_intmap[1] = pci_irq_alloc();
s = getenv("pci_irqc");
if (s)
pci_intmap[2] = simple_strtoul (s, NULL, 10);
else
pci_intmap[2] = pci_irq_alloc();
s = getenv("pci_irqd");
if (s)
pci_intmap[3] = simple_strtoul (s, NULL, 10);
else
pci_intmap[3] = pci_irq_alloc();
}
unsigned char pci_irq_alloc(void)
{
int i;
int interrupt = 10;
unsigned long min_penalty = 1000;
/* Search for the minimal penalty, favoring interrupts at the end */
for (i = 0; i < 16; i++)
{
if (irq_penalties[i] <= min_penalty)
{
interrupt = i;
min_penalty = irq_penalties[i];
}
}
PRINTF("pci_irq_alloc: Minimal penalty is %ld for %d\n", min_penalty, interrupt);
irq_penalties[interrupt]++;
return interrupt;
}
void articiaS_pci_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
{
int8 bus, device, func, pin, line;
int i;
bus = PCI_BUS(dev);
device = PCI_DEV(dev);
func = PCI_FUNC(dev);
PRINTF("Fixup irq of %d:%d.%d\n", bus, device, func);
/* Search for the device in the table */
for (i = 0; fixuptab[i].bus != 0xff; i++)
{
if (bus == fixuptab[i].bus && device == fixuptab[i].device && func == fixuptab[i].func)
{
/* If the device needs an interrupt, write it */
if (fixuptab[i].interrupt != 0xff)
{
PRINTF("Assigning IRQ %d (fixed)\n", fixuptab[i].interrupt);
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, fixuptab[i].interrupt);
}
else
{
/* Otherwise, see if it wants an interrupt, and disable it if needed */
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
if (pin)
{
PRINTF("Disabling IRQ\n");
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 0xff);
}
}
return;
}
}
/* If we get here, we have another PCI device in a slot... find the appropriate IRQ */
/* Find matching pin */
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
pin--;
/* Search for it's map */
for (i = 0; amigaone_pci_routing[i].bus != 0xff; i++)
{
if (bus == amigaone_pci_routing[i].bus && device == amigaone_pci_routing[i].device)
{
line = pci_intmap[amigaone_pci_routing[i].ints[pin]];
PRINTF("Assigning IRQ %d (pin %d)\n", line, pin);
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, line);
return;
}
}
PRINTF("Unkonwn PCI device found\n");
}
void articiaS_pci_init (void)
{
int i;
char *s;
PRINTF("atriciaS_pci_init\n");
/* Why aren't these relocated?? */
for (i=0; config_table[i].config_device; i++)
{
switch((int)config_table[i].config_device)
{
case cfgfunc_via686: config_table[i].config_device = via_cfgfunc_via686; break;
case cfgfunc_dummy: config_table[i].config_device = pci_cfgfunc_dummy; break;
case cfgfunc_ide_init: config_table[i].config_device = via_cfgfunc_ide_init; break;
default: PRINTF("Error: Unknown constant\n");
}
}
articiaS_hose.first_busno = 0;
articiaS_hose.last_busno = 0xff;
articiaS_hose.config_table = config_table;
articiaS_hose.fixup_irq = articiaS_pci_fixup_irq;
articiaS_pci_irq_init();
/* System memory */
pci_set_region(articiaS_hose.regions + 0,
ARTICIAS_SYS_BUS,
ARTICIAS_SYS_PHYS,
ARTICIAS_SYS_MAXSIZE,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
/* PCI memory space */
pci_set_region(articiaS_hose.regions + 1,
ARTICIAS_PCI_BUS,
ARTICIAS_PCI_PHYS,
ARTICIAS_PCI_MAXSIZE,
PCI_REGION_MEM);
/* PCI io space */
pci_set_region(articiaS_hose.regions + 2,
ARTICIAS_PCIIO_BUS,
ARTICIAS_PCIIO_PHYS,
ARTICIAS_PCIIO_MAXSIZE,
PCI_REGION_IO);
/* PCI/ISA io space */
pci_set_region(articiaS_hose.regions + 3,
ARTICIAS_ISAIO_BUS,
ARTICIAS_ISAIO_PHYS,
ARTICIAS_ISAIO_MAXSIZE,
PCI_REGION_IO);
articiaS_hose.region_count = 4;
pci_setup_indirect(&articiaS_hose, ARTICIAS_PCI_CFGADDR, ARTICIAS_PCI_CFGDATA);
PRINTF("Registering articia hose...\n");
pci_register_hose(&articiaS_hose);
PRINTF("Enabling AGP...\n");
pci_write_config_byte(PCI_BDF(0,0,0), 0x58, 0x01);
PRINTF("Scanning bus...\n");
articiaS_hose.last_busno = pci_hose_scan(&articiaS_hose);
via_init_irq_routing(pci_intmap);
PRINTF("After-Scan results:\n");
PRINTF("Bus range: %d - %d\n", articiaS_hose.first_busno , articiaS_hose.last_busno);
via_init_afterscan();
pci_write_config_byte(PCI_BDF(0,1,0), PCI_INTERRUPT_LINE, 0xFF);
s = getenv("as_irq");
if (s)
{
pci_write_config_byte(PCI_BDF(0,0,0), PCI_INTERRUPT_LINE, simple_strtoul (s, NULL, 10));
}
s = getenv("x86_run_bios");
if (!s || (s && strcmp(s, "on")==0))
{
if (articiaS_init_vga() == -1)
{
/* If the VGA didn't init and we have stdout set to VGA, reset to serial */
/* s = getenv("stdout"); */
/* if (s && strcmp(s, "vga") == 0) */
/* { */
/* setenv("stdout", "serial"); */
/* } */
}
}
pci_write_config_byte(PCI_BDF(0,1,0), PCI_INTERRUPT_LINE, 0xFF);
}
pci_dev_t pci_hose_find_class(struct pci_controller *hose, int bus, short find_class, int index)
{
unsigned int sub_bus, found_multi=0;
unsigned short vendor, class;
unsigned char header_type;
pci_dev_t dev;
u8 c1, c2;
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))
{
if ( dev == PCI_BDF(hose->first_busno,0,0) )
continue;
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;
pci_hose_read_config_byte(hose, dev, 0x0B, &c1);
pci_hose_read_config_byte(hose, dev, 0x0A, &c2);
class = c1<<8 | c2;
/*printf("At %02x:%02x:%02x: class %x\n", */
/* PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev), class); */
if (class == find_class)
{
if (index == 0)
return dev;
else index--;
}
}
}
return ~0;
}
/*
* For a given bus number, find the bridge on this hose that provides this
* bus number. The function scans for bridges and peeks config space offset
* 0x19 (PCI_SECONDARY_BUS).
*/
pci_dev_t pci_find_bridge_for_bus(struct pci_controller *hose, int busnr)
{
pci_dev_t dev;
int bus;
unsigned int found_multi=0;
unsigned char header_type;
unsigned short vendor;
unsigned char secondary_bus;
if (hose == NULL) hose = &articiaS_hose;
if (busnr < hose->first_busno || busnr > hose->last_busno) return PCI_ANY_ID; /* Not in range */
/*
* The bridge must be on a lower bus number
*/
for (bus = hose->first_busno; bus < busnr; 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))
{
if ( dev == PCI_BDF(hose->first_busno,0,0) )
continue;
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;
if (header_type == 1) /* Bridge device header */
{
pci_hose_read_config_byte(hose, dev, PCI_SECONDARY_BUS, &secondary_bus);
if ((int)secondary_bus == busnr) return dev;
}
}
}
}
return PCI_ANY_ID;
}
static short classes[] =
{
PCI_CLASS_DISPLAY_VGA,
PCI_CLASS_DISPLAY_XGA,
PCI_CLASS_DISPLAY_3D,
PCI_CLASS_DISPLAY_OTHER,
~0
};
extern int execute_bios(pci_dev_t gr_dev, void *);
pci_dev_t video_dev;
int articiaS_init_vga (void)
{
extern void shutdown_bios(void);
pci_dev_t dev = ~0;
int busnr = 0;
int classnr = 0;
video_dev = PCI_ANY_ID;
printf("VGA: ");
PRINTF("Trying to initialize x86 VGA Card(s)\n");
while (dev == ~0)
{
PRINTF("Searching for class 0x%x on bus %d\n", classes[classnr], busnr);
/* Find the first of this class on this bus */
dev = pci_hose_find_class(&articiaS_hose, busnr, classes[classnr], 0);
if (dev != ~0)
{
PRINTF("Found VGA Card at %02x:%02x:%02x\n", PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev));
break;
}
busnr++;
if (busnr > articiaS_hose.last_busno)
{
busnr = 0;
classnr ++;
if (classes[classnr] == ~0)
{
printf("NOT PRESENT\n");
return -1;
}
}
}
/*
* If we get here we have found the first graphics card.
* If the bus number is not 0, then it is probably behind a bridge, and the
* bridge needs to be told to forward VGA access.
*/
if (PCI_BUS(dev) != 0)
{
pci_dev_t bridge;
PRINTF("Behind bridge, looking for bridge\n");
bridge = pci_find_bridge_for_bus(&articiaS_hose, PCI_BUS(dev));
if (dev != PCI_ANY_ID)
{
unsigned char agp_control_0;
PRINTF("Got the bridge at %02x:%02x:%02x\n",
PCI_BUS(bridge), PCI_DEV(bridge), PCI_FUNC(bridge));
pci_hose_read_config_byte(&articiaS_hose, bridge, 0x3E, &agp_control_0);
agp_control_0 |= 0x18;
pci_hose_write_config_byte(&articiaS_hose, bridge, 0x3E, agp_control_0);
PRINTF("Configured for VGA forwarding\n");
}
}
/*
* Now try to run the bios
*/
PRINTF("Trying to run bios now\n");
if (execute_bios(dev, gd->relocaddr))
{
printf("OK\n");
video_dev = dev;
}
else
{
printf("ERROR\n");
}
PRINTF("Done scanning.\n");
shutdown_bios();
if (dev == PCI_ANY_ID) return -1;
else return 0;
}
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