3 * Hyperion Entertainment, Hans-JoergF@hyperion-entertainment.com
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #undef ARTICIA_PCI_DEBUG
31 #ifdef ARTICIA_PCI_DEBUG
32 #define PRINTF(fmt,args...) printf (fmt ,##args)
34 #define PRINTF(fmt,args...)
37 struct pci_controller articiaS_hose
;
39 long irq_alloc(long wanted
);
41 static pci_dev_t
pci_hose_find_class(struct pci_controller
*hose
, int bus
, short find_class
, int index
);
42 static int articiaS_init_vga(void);
43 static void pci_cfgfunc_dummy(struct pci_controller
*host
, pci_dev_t dev
, struct pci_config_table
*table
);
44 unsigned char pci_irq_alloc(void);
46 extern void via_cfgfunc_via686(struct pci_controller
* host
, pci_dev_t dev
, struct pci_config_table
*table
);
47 extern void via_cfgfunc_ide_init(struct pci_controller
*host
, pci_dev_t dev
, struct pci_config_table
*table
);
48 extern void via_init_irq_routing(uint8
[]);
49 extern void via_init_afterscan(void);
51 #define cfgfunc_via686 1
52 #define cfgfunc_dummy 2
53 #define cfgfunc_ide_init 3
55 static struct pci_config_table config_table
[] =
58 0x1106, PCI_ANY_ID
, PCI_CLASS_BRIDGE_ISA
, PCI_ANY_ID
, PCI_ANY_ID
, PCI_ANY_ID
,
59 (void *)cfgfunc_via686
, {0, 0, 0}
62 0x1106, PCI_ANY_ID
, PCI_ANY_ID
, 0,7,4,
63 (void *)cfgfunc_dummy
, {0,0,0}
66 0x1106, 0x3068, PCI_ANY_ID
, 0, 7, PCI_ANY_ID
,
67 (void *)cfgfunc_dummy
, {0,0,0}
70 0x1106, PCI_ANY_ID
, PCI_ANY_ID
, 0,7,1,
71 (void *)cfgfunc_ide_init
, {0,0,0}
79 void pci_cfgfunc_dummy(struct pci_controller
*host
, pci_dev_t dev
, struct pci_config_table
*table
)
85 unsigned long irq_penalties
[16] =
88 1000, /* 1:keyboard */
90 50, /* 3:serial (COM2) */
91 50, /* 4:serial (COM1) */
107 * The following defines a hard-coded interrupt mapping for the
108 * know devices on the board.
109 * If a device isn't found here, assumed to be a device that's
110 * plugged into a PCI or AGP slot
111 * NOTE: This table is machine dependant.
114 struct pci_irq_fixup_table
116 uint8 bus
; /* Bus number */
117 uint8 device
; /* Device number */
118 uint8 func
; /* Function number */
119 uint8 interrupt
; /* Interrupt to use (0xff to disable) */
122 struct pci_irq_fixup_table fixuptab
[] =
124 { 0, 0, 0, 0xff}, /* Articia S host bridge */
125 { 0, 1, 0, 0xff}, /* Articia S AGP bridge */
126 // { 0, 6, 0, 0x05}, /* 3COM ethernet */
127 { 0, 7, 0, 0xff}, /* VIA southbridge */
128 { 0, 7, 1, 0x0e}, /* IDE controller in legacy mode */
129 // { 0, 7, 2, 0x05}, /* First USB controller */
130 // { 0, 7, 3, 0x0c}, /* Second USB controller (shares interrupt with ethernet) */
131 { 0, 7, 4, 0xff}, /* ACPI Power Management */
132 // { 0, 7, 5, 0x08}, /* AC97 */
133 // { 0, 7, 6, 0x08}, /* MC97 */
134 { 0xff, 0xff, 0xff, 0xff}
139 * This table maps IRQ's to PCI interrupts
142 uint8 pci_intmap
[4] = {0, 0, 0, 0};
145 * Map PCI slots to interrupt routings
146 * This table lists the device number assigned to a card inserted
147 * into the slot, along with a permutation for the slot's IRQ routing.
148 * NOTE: This table is machine dependant.
151 struct pci_slot_irq_routing
159 struct pci_slot_irq_routing amigaone_pci_routing
[] =
161 {0, 8, {0, 1, 2, 3}}, /* Slot 1 (left of riser slot) */
162 {0, 9, {1, 2, 3, 0}}, /* Slot 2 (middle slot) */
163 {0, 10, {2, 3, 0, 1}}, /* Slot 3 (leftmost slot) */
164 {1, 0, {1, 0, 2, 3}}, /* AGP slot (only IRQA and IRQB) */
165 {1, 1, {1, 2, 3, 0}}, /* PCI slot on AGP bus */
166 {0, 6, {3, 3, 3, 3}}, /* On board ethernet */
167 {0, 7, {0, 1, 2, 3}}, /* Southbridge */
168 {0xff, 0, {0, 0, 0, 0}}
171 void articiaS_pci_irq_init(void)
175 s
= getenv("pci_irqa");
177 pci_intmap
[0] = simple_strtoul (s
, NULL
, 10);
179 pci_intmap
[0] = pci_irq_alloc();
181 s
= getenv("pci_irqb");
183 pci_intmap
[1] = simple_strtoul (s
, NULL
, 10);
185 pci_intmap
[1] = pci_irq_alloc();
187 s
= getenv("pci_irqc");
189 pci_intmap
[2] = simple_strtoul (s
, NULL
, 10);
191 pci_intmap
[2] = pci_irq_alloc();
193 s
= getenv("pci_irqd");
195 pci_intmap
[3] = simple_strtoul (s
, NULL
, 10);
197 pci_intmap
[3] = pci_irq_alloc();
201 unsigned char pci_irq_alloc(void)
205 unsigned long min_penalty
= 1000;
207 /* Search for the minimal penalty, favoring interrupts at the end */
208 for (i
= 0; i
< 16; i
++)
210 if (irq_penalties
[i
] <= min_penalty
)
213 min_penalty
= irq_penalties
[i
];
217 PRINTF("pci_irq_alloc: Minimal penalty is %ld for %d\n", min_penalty
, interrupt
);
219 irq_penalties
[interrupt
]++;
225 void articiaS_pci_fixup_irq(struct pci_controller
*hose
, pci_dev_t dev
)
227 int8 bus
, device
, func
, pin
, line
;
231 device
= PCI_DEV(dev
);
232 func
= PCI_FUNC(dev
);
234 PRINTF("Fixup irq of %d:%d.%d\n", bus
, device
, func
);
236 /* Search for the device in the table */
237 for (i
= 0; fixuptab
[i
].bus
!= 0xff; i
++)
239 if (bus
== fixuptab
[i
].bus
&& device
== fixuptab
[i
].device
&& func
== fixuptab
[i
].func
)
241 /* If the device needs an interrupt, write it */
242 if (fixuptab
[i
].interrupt
!= 0xff)
244 PRINTF("Assigning IRQ %d (fixed)\n", fixuptab
[i
].interrupt
);
245 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, fixuptab
[i
].interrupt
);
249 /* Otherwise, see if it wants an interrupt, and disable it if needed */
250 pci_read_config_byte(dev
, PCI_INTERRUPT_PIN
, &pin
);
253 PRINTF("Disabling IRQ\n");
254 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, 0xff);
262 /* If we get here, we have another PCI device in a slot... find the appropriate IRQ */
264 /* Find matching pin */
265 pci_read_config_byte(dev
, PCI_INTERRUPT_PIN
, &pin
);
268 /* Search for it's map */
269 for (i
= 0; amigaone_pci_routing
[i
].bus
!= 0xff; i
++)
271 if (bus
== amigaone_pci_routing
[i
].bus
&& device
== amigaone_pci_routing
[i
].device
)
273 line
= pci_intmap
[amigaone_pci_routing
[i
].ints
[pin
]];
274 PRINTF("Assigning IRQ %d (pin %d)\n", line
, pin
);
275 pci_write_config_byte(dev
, PCI_INTERRUPT_LINE
, line
);
280 PRINTF("Unkonwn PCI device found\n");
283 void articiaS_pci_init (void)
288 PRINTF("atriciaS_pci_init\n");
290 // Why aren't these relocated??
291 for (i
=0; config_table
[i
].config_device
; i
++)
293 switch((int)config_table
[i
].config_device
)
295 case cfgfunc_via686
: config_table
[i
].config_device
= via_cfgfunc_via686
; break;
296 case cfgfunc_dummy
: config_table
[i
].config_device
= pci_cfgfunc_dummy
; break;
297 case cfgfunc_ide_init
: config_table
[i
].config_device
= via_cfgfunc_ide_init
; break;
298 default: PRINTF("Error: Unknown constant\n");
302 articiaS_hose
.first_busno
= 0;
303 articiaS_hose
.last_busno
= 0xff;
304 articiaS_hose
.config_table
= config_table
;
305 articiaS_hose
.fixup_irq
= articiaS_pci_fixup_irq
;
307 articiaS_pci_irq_init();
310 pci_set_region(articiaS_hose
.regions
+ 0,
313 ARTICIAS_SYS_MAXSIZE
,
314 PCI_REGION_MEM
| PCI_REGION_MEMORY
);
316 /* PCI memory space */
317 pci_set_region(articiaS_hose
.regions
+ 1,
320 ARTICIAS_PCI_MAXSIZE
,
324 pci_set_region(articiaS_hose
.regions
+ 2,
327 ARTICIAS_PCIIO_MAXSIZE
,
330 /* PCI/ISA io space */
331 pci_set_region(articiaS_hose
.regions
+ 3,
334 ARTICIAS_ISAIO_MAXSIZE
,
339 articiaS_hose
.region_count
= 4;
341 pci_setup_indirect(&articiaS_hose
, ARTICIAS_PCI_CFGADDR
, ARTICIAS_PCI_CFGDATA
);
342 PRINTF("Registering articia hose...\n");
343 pci_register_hose(&articiaS_hose
);
344 PRINTF("Enabling AGP...\n");
345 pci_write_config_byte(PCI_BDF(0,0,0), 0x58, 0x01);
346 PRINTF("Scanning bus...\n");
347 articiaS_hose
.last_busno
= pci_hose_scan(&articiaS_hose
);
349 via_init_irq_routing(pci_intmap
);
351 PRINTF("After-Scan results:\n");
352 PRINTF("Bus range: %d - %d\n", articiaS_hose
.first_busno
, articiaS_hose
.last_busno
);
354 via_init_afterscan();
356 pci_write_config_byte(PCI_BDF(0,1,0), PCI_INTERRUPT_LINE
, 0xFF);
358 s
= getenv("as_irq");
361 pci_write_config_byte(PCI_BDF(0,0,0), PCI_INTERRUPT_LINE
, simple_strtoul (s
, NULL
, 10));
364 s
= getenv("x86_run_bios");
365 if (!s
|| (s
&& strcmp(s
, "on")==0))
367 if (articiaS_init_vga() == -1)
369 /* If the VGA didn't init and we have stdout set to VGA, reset to serial */
370 /* s = getenv("stdout"); */
371 /* if (s && strcmp(s, "vga") == 0) */
373 /* setenv("stdout", "serial"); */
377 pci_write_config_byte(PCI_BDF(0,1,0), PCI_INTERRUPT_LINE
, 0xFF);
381 pci_dev_t
pci_hose_find_class(struct pci_controller
*hose
, int bus
, short find_class
, int index
)
383 unsigned int sub_bus
, found_multi
=0;
384 unsigned short vendor
, class;
385 unsigned char header_type
;
391 for (dev
= PCI_BDF(bus
,0,0);
392 dev
< PCI_BDF(bus
,PCI_MAX_PCI_DEVICES
-1,PCI_MAX_PCI_FUNCTIONS
-1);
393 dev
+= PCI_BDF(0,0,1))
395 if ( dev
== PCI_BDF(hose
->first_busno
,0,0) )
398 if (PCI_FUNC(dev
) && !found_multi
)
401 pci_hose_read_config_byte(hose
, dev
, PCI_HEADER_TYPE
, &header_type
);
403 pci_hose_read_config_word(hose
, dev
, PCI_VENDOR_ID
, &vendor
);
405 if (vendor
!= 0xffff && vendor
!= 0x0000)
409 found_multi
= header_type
& 0x80;
410 pci_hose_read_config_byte(hose
, dev
, 0x0B, &c1
);
411 pci_hose_read_config_byte(hose
, dev
, 0x0A, &c2
);
413 //printf("At %02x:%02x:%02x: class %x\n",
414 // PCI_BUS(dev), PCI_DEV(dev), PCI_FUNC(dev), class);
415 if (class == find_class
)
429 * For a given bus number, find the bridge on this hose that provides this
430 * bus number. The function scans for bridges and peeks config space offset
431 * 0x19 (PCI_SECONDARY_BUS).
433 pci_dev_t
pci_find_bridge_for_bus(struct pci_controller
*hose
, int busnr
)
437 unsigned int found_multi
=0;
438 unsigned char header_type
;
439 unsigned short vendor
;
440 unsigned char secondary_bus
;
442 if (hose
== NULL
) hose
= &articiaS_hose
;
444 if (busnr
< hose
->first_busno
|| busnr
> hose
->last_busno
) return PCI_ANY_ID
; // Not in range
447 * The bridge must be on a lower bus number
449 for (bus
= hose
->first_busno
; bus
< busnr
; bus
++)
451 for (dev
= PCI_BDF(bus
,0,0);
452 dev
< PCI_BDF(bus
,PCI_MAX_PCI_DEVICES
-1,PCI_MAX_PCI_FUNCTIONS
-1);
453 dev
+= PCI_BDF(0,0,1))
455 if ( dev
== PCI_BDF(hose
->first_busno
,0,0) )
458 if (PCI_FUNC(dev
) && !found_multi
)
461 pci_hose_read_config_byte(hose
, dev
, PCI_HEADER_TYPE
, &header_type
);
463 pci_hose_read_config_word(hose
, dev
, PCI_VENDOR_ID
, &vendor
);
465 if (vendor
!= 0xffff && vendor
!= 0x0000)
469 found_multi
= header_type
& 0x80;
470 if (header_type
== 1) // Bridge device header
472 pci_hose_read_config_byte(hose
, dev
, PCI_SECONDARY_BUS
, &secondary_bus
);
473 if ((int)secondary_bus
== busnr
) return dev
;
482 static short classes
[] =
484 PCI_CLASS_DISPLAY_VGA
,
485 PCI_CLASS_DISPLAY_XGA
,
486 PCI_CLASS_DISPLAY_3D
,
487 PCI_CLASS_DISPLAY_OTHER
,
491 extern int execute_bios(pci_dev_t gr_dev
, void *);
495 int articiaS_init_vga (void)
497 DECLARE_GLOBAL_DATA_PTR
;
499 extern void shutdown_bios(void);
504 video_dev
= PCI_ANY_ID
;
508 PRINTF("Trying to initialize x86 VGA Card(s)\n");
512 PRINTF("Searching for class 0x%x on bus %d\n", classes
[classnr
], busnr
);
513 /* Find the first of this class on this bus */
514 dev
= pci_hose_find_class(&articiaS_hose
, busnr
, classes
[classnr
], 0);
517 PRINTF("Found VGA Card at %02x:%02x:%02x\n", PCI_BUS(dev
), PCI_DEV(dev
), PCI_FUNC(dev
));
521 if (busnr
> articiaS_hose
.last_busno
)
525 if (classes
[classnr
] == ~0)
527 printf("NOT PRESENT\n");
534 * If we get here we have found the first graphics card.
535 * If the bus number is not 0, then it is probably behind a bridge, and the
536 * bridge needs to be told to forward VGA access.
539 if (PCI_BUS(dev
) != 0)
542 PRINTF("Behind bridge, looking for bridge\n");
543 bridge
= pci_find_bridge_for_bus(&articiaS_hose
, PCI_BUS(dev
));
544 if (dev
!= PCI_ANY_ID
)
546 unsigned char agp_control_0
;
547 PRINTF("Got the bridge at %02x:%02x:%02x\n",
548 PCI_BUS(bridge
), PCI_DEV(bridge
), PCI_FUNC(bridge
));
549 pci_hose_read_config_byte(&articiaS_hose
, bridge
, 0x3E, &agp_control_0
);
550 agp_control_0
|= 0x18;
551 pci_hose_write_config_byte(&articiaS_hose
, bridge
, 0x3E, agp_control_0
);
552 PRINTF("Configured for VGA forwarding\n");
557 * Now try to run the bios
559 PRINTF("Trying to run bios now\n");
560 if (execute_bios(dev
, gd
->relocaddr
))
570 PRINTF("Done scanning.\n");
574 if (dev
== PCI_ANY_ID
) return -1;