2 * This file is part of the coreboot project.
4 * Copyright (C) 2007, 2008 Rudolf Marek <r.marek@assembler.cz>
5 * Copyright (C) 2009 Jon Harrison <bothlyn@blueyonder.co.uk>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 /* Inspiration from other VIA SB code. */
24 #include <console/console.h>
25 #include <device/device.h>
26 #include <device/pci.h>
27 #include <device/pci_ids.h>
28 #include <pc80/mc146818rtc.h>
29 #include <arch/ioapic.h>
30 #include <cpu/x86/lapic.h>
32 #include <pc80/keyboard.h>
33 #include <pc80/i8259.h>
38 static void southbridge_init_common(struct device *dev);
40 #if CONFIG_EPIA_VT8237R_INIT
41 /* Interrupts for INT# A B C D */
42 static const unsigned char pciIrqs[4] = { 10, 11, 12, 0};
44 /* Interrupt Assignments for Pins 1 2 3 4 */
45 static const unsigned char sataPins[4] = { 'A','B','C','D'};
46 static const unsigned char vgaPins[4] = { 'A','B','C','D'};
47 static const unsigned char usbPins[4] = { 'A','B','C','D'};
48 static const unsigned char enetPins[4] = { 'A','B','C','D'};
49 static const unsigned char vt8237Pins[4] = { 'A','B','C','D'};
50 static const unsigned char slotPins[4] = { 'C','D','A','B'};
51 static const unsigned char riserPins[4] = { 'D','C','B','A'};
53 static unsigned char *pin_to_irq(const unsigned char *pin)
55 static unsigned char Irqs[4];
57 for (i = 0 ; i < 4 ; i++)
58 Irqs[i] = pciIrqs[ pin[i] - 'A' ];
64 /** Set up PCI IRQ routing, route everything through APIC. */
65 static void pci_routing_fixup(struct device *dev)
67 #if CONFIG_EPIA_VT8237R_INIT
71 /* PCI PNP Interrupt Routing INTE/F - disable */
72 pci_write_config8(dev, 0x44, 0x00);
74 /* PCI PNP Interrupt Routing INTG/H - disable */
75 pci_write_config8(dev, 0x45, 0x00);
77 /* Gate Interrupts until RAM Writes are flushed */
78 pci_write_config8(dev, 0x49, 0x20);
80 #if CONFIG_EPIA_VT8237R_INIT
82 /* Share INTE-INTH with INTA-INTD as per stock BIOS. */
83 pci_write_config8(dev, 0x46, 0x00);
85 /* setup PCI IRQ routing (For PCI Slot)*/
86 pci_write_config8(dev, 0x55, pciIrqs[0] << 4);
87 pci_write_config8(dev, 0x56, pciIrqs[1] | (pciIrqs[2] << 4) );
88 pci_write_config8(dev, 0x57, pciIrqs[3] << 4);
90 /* PCI Routing Fixup */
93 pci_assign_irqs(0, 0x14, pin_to_irq(slotPins));
95 // Via 2 slot riser card 2nd slot
96 pci_assign_irqs(0, 0x13, pin_to_irq(riserPins));
99 pci_assign_irqs(0, 0x10, pin_to_irq(usbPins));
101 //Setup VT8237R Sound
102 pci_assign_irqs(0, 0x11, pin_to_irq(vt8237Pins));
105 pci_assign_irqs(0, 0x12, pin_to_irq(enetPins));
108 pci_assign_irqs(1, 0x00, pin_to_irq(vgaPins));
110 /* APIC Routing Fixup */
113 pdev = dev_find_device(PCI_VENDOR_ID_VIA,
114 PCI_DEVICE_ID_VIA_VT6420_SATA, 0);
115 pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x02);
116 pci_assign_irqs(0, 0x0f, pin_to_irq(sataPins));
119 // Setup PATA Override
120 pdev = dev_find_device(PCI_VENDOR_ID_VIA,
121 PCI_DEVICE_ID_VIA_82C586_1, 0);
122 pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x01);
123 pci_write_config8(pdev, PCI_INTERRUPT_LINE, 0xFF);
126 /* Route INTE-INTH through registers above, no map to INTA-INTD. */
127 pci_write_config8(dev, 0x46, 0x10);
129 /* PCI Interrupt Polarity */
130 pci_write_config8(dev, 0x54, 0x00);
132 /* PCI INTA# Routing */
133 pci_write_config8(dev, 0x55, 0x00);
135 /* PCI INTB#/C# Routing */
136 pci_write_config8(dev, 0x56, 0x00);
138 /* PCI INTD# Routing */
139 pci_write_config8(dev, 0x57, 0x00);
146 * Set up the power management capabilities directly into ACPI mode.
147 * This avoids having to handle any System Management Interrupts (SMIs).
150 extern u8 acpi_slp_type;
153 static void setup_pm(device_t dev)
156 /* Debounce LID and PWRBTN# Inputs for 16ms. */
157 pci_write_config8(dev, 0x80, 0x20);
159 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
160 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
162 /* Set ACPI to 9, must set IRQ 9 override to level! Set PSON gating. */
163 pci_write_config8(dev, 0x82, 0x40 | VT8237R_ACPI_IRQ);
165 #if CONFIG_EPIA_VT8237R_INIT
166 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
167 pci_write_config16(dev, 0x84, 0x3052);
169 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
170 pci_write_config16(dev, 0x84, 0x30b2);
173 /* SMI output level to low, 7.5us throttle clock */
174 pci_write_config8(dev, 0x8d, 0x18);
176 /* GP Timer Control 1s */
177 pci_write_config8(dev, 0x93, 0x88);
180 * 7 = SMBus clock from RTC 32.768KHz
181 * 5 = Internal PLL reset from susp disabled
184 pci_write_config8(dev, 0x94, 0xa0);
187 * 7 = stp to sust delay 1msec
188 * 6 = SUSST# Deasserted Before PWRGD for STD
189 * 5 = Keyboard/Mouse Swap
190 * 4 = PWRGOOD reset on VT8237A/S
191 * 3 = GPO26/GPO27 is GPO
192 * 2 = Disable Alert on Lan
197 #if CONFIG_EPIA_VT8237R_INIT
198 pci_write_config8(dev, 0x95, 0xc2);
200 pci_write_config8(dev, 0x95, 0xcc);
203 /* Disable GP3 timer. */
204 pci_write_config8(dev, 0x98, 0);
206 /* Enable ACPI accessm RTC signal gated with PSON. */
207 pci_write_config8(dev, 0x81, 0x84);
209 /* Clear status events. */
210 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x00);
211 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x20);
212 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x28);
213 outl(0xffffffff, VT8237R_ACPI_IO_BASE + 0x30);
215 /* Disable SCI on GPIO. */
216 outw(0x0, VT8237R_ACPI_IO_BASE + 0x22);
218 /* Disable SMI on GPIO. */
219 outw(0x0, VT8237R_ACPI_IO_BASE + 0x24);
221 /* Disable all global enable SMIs, except SW SMI */
222 outw(0x40, VT8237R_ACPI_IO_BASE + 0x2a);
224 /* Primary activity SMI disable. */
225 outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
227 /* GP timer reload on none. */
228 outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
230 /* Disable extended IO traps. */
231 outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
233 /* SCI is generated for RTC/pwrBtn/slpBtn. */
234 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
235 #if CONFIG_HAVE_ACPI_RESUME == 1
236 acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
237 printk(BIOS_DEBUG, "SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
240 /* All SMI on, both IDE buses ON, PSON rising edge. */
241 outw(0x1, VT8237R_ACPI_IO_BASE + 0x2c);
246 outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
249 static void vt8237r_init(struct device *dev)
253 #if CONFIG_EPIA_VT8237R_INIT
254 printk(BIOS_SPEW, "Entering vt8237r_init, for EPIA.\n");
256 * TODO: Looks like stock BIOS can do this but causes a hang
257 * Enable SATA LED, disable special CPU Frequency Change -
258 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
259 * Setup to match EPIA default
262 enables = pci_read_config8(dev, 0xe5);
264 pci_write_config8(dev, 0xe5, enables);
267 * Enable Flash Write Access.
268 * Note EPIA-N Does not use REQ5 or PCISTP#(Hang)
270 enables = pci_read_config8(dev, 0xe4);
272 pci_write_config8(dev, 0xe4, enables);
274 /* Enables Extra RTC Ports */
275 enables = pci_read_config8(dev, 0x4E);
277 pci_write_config8(dev, 0x4E, enables);
280 printk(BIOS_SPEW, "Entering vt8237r_init.\n");
282 * Enable SATA LED, disable special CPU Frequency Change -
283 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
285 pci_write_config8(dev, 0xe5, 0x09);
287 /* REQ5 as PCI request input - should be together with INTE-INTH. */
288 pci_write_config8(dev, 0xe4, 0x4);
291 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
292 enables = pci_read_config8(dev, 0x4f);
294 pci_write_config8(dev, 0x4f, enables);
296 #if CONFIG_EPIA_VT8237R_INIT
298 * Set Read Pass Write Control Enable
300 pci_write_config8(dev, 0x48, 0x0c);
303 #if CONFIG_SOUTHBRIDGE_VIA_K8T800
304 /* It seems that when we pair with the K8T800, we need to disable
307 pci_write_config8(dev, 0x48, 0x0c);
310 * Set Read Pass Write Control Enable
311 * (force A2 from APIC FSB to low).
313 pci_write_config8(dev, 0x48, 0x8c);
318 southbridge_init_common(dev);
320 #if !CONFIG_EPIA_VT8237R_INIT
321 /* FIXME: Intel needs more bit set for C2/C3. */
324 * Allow SLP# signal to assert LDTSTOP_L.
325 * Will work for C3 and for FID/VID change.
327 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
330 printk(BIOS_SPEW, "Leaving %s.\n", __func__);
331 printk(BIOS_SPEW, "And taking a dump:\n");
335 static void vt8237a_init(struct device *dev)
338 * FIXME: This is based on vt8237s_init() and the values the AMI
339 * BIOS on my M2V wrote to these registers (by loking
340 * at lspci -nxxx output).
345 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
346 tmp = pci_read_config8(dev, 0x4f);
348 pci_write_config8(dev, 0x4f, tmp);
351 * bit2: REQ5 as PCI request input - should be together with INTE-INTH.
352 * bit5: usb power control lines as gpio
354 pci_write_config8(dev, 0xe4, 0x24);
356 * Enable APIC wakeup from INTH
357 * Enable SATA LED, disable special CPU Frequency Change -
358 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
360 pci_write_config8(dev, 0xe5, 0x69);
362 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
363 pci_write_config8(dev, 0xec, 0x4);
365 /* Host Bus Power Management Control, maybe not needed */
366 pci_write_config8(dev, 0x8c, 0x5);
368 /* Enable HPET at VT8237R_HPET_ADDR. */
369 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
371 southbridge_init_common(dev);
373 /* Share INTE-INTH with INTA-INTD for simplicity */
374 pci_write_config8(dev, 0x46, 0x00);
376 /* FIXME: Intel needs more bit set for C2/C3. */
379 * Allow SLP# signal to assert LDTSTOP_L.
380 * Will work for C3 and for FID/VID change.
382 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
387 static void vt8237s_init(struct device *dev)
391 /* Put SPI base VT8237S_SPI_MEM_BASE. */
392 tmp = pci_read_config32(dev, 0xbc);
393 pci_write_config32(dev, 0xbc,
394 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
397 * REQ5 as PCI request input - should be together with INTE-INTH.
399 pci_write_config8(dev, 0xe4, 0x04);
401 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
402 pci_write_config8(dev, 0xec, 0x4);
404 /* Host Bus Power Management Control, maybe not needed */
405 pci_write_config8(dev, 0x8c, 0x5);
407 /* Enable HPET at VT8237R_HPET_ADDR., does not work correctly on R. */
408 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
410 southbridge_init_common(dev);
412 /* FIXME: Intel needs more bit set for C2/C3. */
415 * Allow SLP# signal to assert LDTSTOP_L.
416 * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
418 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
423 static void vt8237_common_init(struct device *dev)
427 /* Enable addr/data stepping. */
428 byte = pci_read_config8(dev, PCI_COMMAND);
429 byte |= PCI_COMMAND_WAIT;
430 pci_write_config8(dev, PCI_COMMAND, byte);
432 /* EPIA-N(L) Uses CN400 for BIOS Access */
433 #if !CONFIG_EPIA_VT8237R_INIT
434 /* Enable the internal I/O decode. */
435 enables = pci_read_config8(dev, 0x6C);
437 pci_write_config8(dev, 0x6C, enables);
442 * 7 000E0000h-000EFFFFh
443 * 6 FFF00000h-FFF7FFFFh
444 * 5 FFE80000h-FFEFFFFFh
445 * 4 FFE00000h-FFE7FFFFh
446 * 3 FFD80000h-FFDFFFFFh
447 * 2 FFD00000h-FFD7FFFFh
448 * 1 FFC80000h-FFCFFFFFh
449 * 0 FFC00000h-FFC7FFFFh
450 * So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
452 pci_write_config8(dev, 0x41, 0x7f);
456 * Set bit 6 of 0x40 (I/O recovery time).
457 * IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
458 * that PCI interrupts can be properly marked as level triggered.
460 enables = pci_read_config8(dev, 0x40);
462 pci_write_config8(dev, 0x40, enables);
464 /* Line buffer control */
465 enables = pci_read_config8(dev, 0x42);
467 pci_write_config8(dev, 0x42, enables);
469 /* Delay transaction control */
470 pci_write_config8(dev, 0x43, 0xb);
472 #if CONFIG_EPIA_VT8237R_INIT
473 /* I/O recovery time, default IDE routing */
474 pci_write_config8(dev, 0x4c, 0x04);
476 /* ROM memory cycles go to LPC. */
477 pci_write_config8(dev, 0x59, 0x80);
482 * 3 | Bypass APIC De-Assert Message (1=Enable)
483 * 2 | APIC HyperTransport Mode (1=Enable)
484 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
485 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
486 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
488 pci_write_config8(dev, 0x5b, 0x9);
490 /* Set 0x58 to 0x42 APIC On and RTC Write Protect.*/
491 pci_write_config8(dev, 0x58, 0x42);
493 /* Enable serial IRQ, 6PCI clocks. */
494 pci_write_config8(dev, 0x52, 0x9);
496 /* I/O recovery time, default IDE routing */
497 pci_write_config8(dev, 0x4c, 0x44);
499 /* ROM memory cycles go to LPC. */
500 pci_write_config8(dev, 0x59, 0x80);
505 * 3 | Bypass APIC De-Assert Message (1=Enable)
506 * 2 | APIC HyperTransport Mode (1=Enable)
507 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
508 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
509 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
511 pci_write_config8(dev, 0x5b, 0xb);
513 /* Set 0x58 to 0x43 APIC and RTC. */
514 pci_write_config8(dev, 0x58, 0x43);
516 /* Enable serial IRQ, 6PCI clocks. */
517 pci_write_config8(dev, 0x52, 0x9);
519 #if CONFIG_HAVE_SMI_HANDLER
523 /* Power management setup */
530 static void vt8237r_read_resources(device_t dev)
532 struct resource *res;
534 pci_dev_read_resources(dev);
536 /* Fixed ACPI Base IO Base*/
537 res = new_resource(dev, 0x88);
538 res->base = VT8237R_ACPI_IO_BASE;
540 res->limit = 0xffffUL;
541 res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE |
542 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
544 /* Fixed EISA ECLR I/O Regs */
545 res = new_resource(dev, 3);
548 res->limit = 0xffffUL;
549 res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE |
550 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
552 /* Fixed System Management Bus I/O Resource */
553 res = new_resource(dev, 0xD0);
554 res->base = VT8237R_SMBUS_IO_BASE;
556 res->limit = 0xffffUL;
557 res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE |
558 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
560 /* Fixed APIC resource */
561 res = new_resource(dev, 0x44);
562 res->base = IO_APIC_ADDR;
564 res->limit = 0xffffffffUL;
567 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_RESERVE |
568 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
570 /* Fixed flashrom resource */
571 res = new_resource(dev, 4);
572 res->base = 0xff000000UL;
573 res->size = 0x01000000UL; /* 16MB */
574 res->limit = 0xffffffffUL;
575 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_RESERVE |
576 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
578 res = new_resource(dev, 1);
580 res->size = 0x1000UL;
581 res->limit = 0xffffUL;
582 res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
585 static void init_keyboard(struct device *dev)
587 u8 regval = pci_read_config8(dev, 0x51);
592 static void southbridge_init_common(struct device *dev)
594 vt8237_common_init(dev);
595 pci_routing_fixup(dev);
596 setup_ioapic(IO_APIC_ADDR, VT8237R_APIC_ID);
601 static const struct device_operations vt8237r_lpc_ops_s = {
602 .read_resources = vt8237r_read_resources,
603 .set_resources = pci_dev_set_resources,
604 .enable_resources = pci_dev_enable_resources,
605 .init = vt8237s_init,
606 .scan_bus = scan_static_bus,
609 static const struct device_operations vt8237r_lpc_ops_r = {
610 .read_resources = vt8237r_read_resources,
611 .set_resources = pci_dev_set_resources,
612 .enable_resources = pci_dev_enable_resources,
613 .init = vt8237r_init,
614 .scan_bus = scan_static_bus,
617 static const struct device_operations vt8237r_lpc_ops_a = {
618 .read_resources = vt8237r_read_resources,
619 .set_resources = pci_dev_set_resources,
620 .enable_resources = pci_dev_enable_resources,
621 .init = vt8237a_init,
622 .scan_bus = scan_static_bus,
625 static const struct pci_driver lpc_driver_r __pci_driver = {
626 .ops = &vt8237r_lpc_ops_r,
627 .vendor = PCI_VENDOR_ID_VIA,
628 .device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
631 static const struct pci_driver lpc_driver_a __pci_driver = {
632 .ops = &vt8237r_lpc_ops_a,
633 .vendor = PCI_VENDOR_ID_VIA,
634 .device = PCI_DEVICE_ID_VIA_VT8237A_LPC,
637 static const struct pci_driver lpc_driver_s __pci_driver = {
638 .ops = &vt8237r_lpc_ops_s,
639 .vendor = PCI_VENDOR_ID_VIA,
640 .device = PCI_DEVICE_ID_VIA_VT8237S_LPC,