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>
35 #include <arch/acpi.h>
39 static void southbridge_init_common(struct device *dev);
41 #if CONFIG_EPIA_VT8237R_INIT
42 /* Interrupts for INT# A B C D */
43 static const unsigned char pciIrqs[4] = { 10, 11, 12, 0};
45 /* Interrupt Assignments for Pins 1 2 3 4 */
46 static const unsigned char sataPins[4] = { 'A','B','C','D'};
47 static const unsigned char vgaPins[4] = { 'A','B','C','D'};
48 static const unsigned char usbPins[4] = { 'A','B','C','D'};
49 static const unsigned char enetPins[4] = { 'A','B','C','D'};
50 static const unsigned char vt8237Pins[4] = { 'A','B','C','D'};
51 static const unsigned char slotPins[4] = { 'C','D','A','B'};
52 static const unsigned char riserPins[4] = { 'D','C','B','A'};
54 static unsigned char *pin_to_irq(const unsigned char *pin)
56 static unsigned char Irqs[4];
58 for (i = 0 ; i < 4 ; i++)
59 Irqs[i] = pciIrqs[ pin[i] - 'A' ];
65 /** Set up PCI IRQ routing, route everything through APIC. */
66 static void pci_routing_fixup(struct device *dev)
68 #if CONFIG_EPIA_VT8237R_INIT
72 /* PCI PNP Interrupt Routing INTE/F - disable */
73 pci_write_config8(dev, 0x44, 0x00);
75 /* PCI PNP Interrupt Routing INTG/H - disable */
76 pci_write_config8(dev, 0x45, 0x00);
78 /* Gate Interrupts until RAM Writes are flushed */
79 pci_write_config8(dev, 0x49, 0x20);
81 #if CONFIG_EPIA_VT8237R_INIT
83 /* Share INTE-INTH with INTA-INTD as per stock BIOS. */
84 pci_write_config8(dev, 0x46, 0x00);
86 /* setup PCI IRQ routing (For PCI Slot)*/
87 pci_write_config8(dev, 0x55, pciIrqs[0] << 4);
88 pci_write_config8(dev, 0x56, pciIrqs[1] | (pciIrqs[2] << 4) );
89 pci_write_config8(dev, 0x57, pciIrqs[3] << 4);
91 /* PCI Routing Fixup */
94 pci_assign_irqs(0, 0x14, pin_to_irq(slotPins));
96 // Via 2 slot riser card 2nd slot
97 pci_assign_irqs(0, 0x13, pin_to_irq(riserPins));
100 pci_assign_irqs(0, 0x10, pin_to_irq(usbPins));
102 //Setup VT8237R Sound
103 pci_assign_irqs(0, 0x11, pin_to_irq(vt8237Pins));
106 pci_assign_irqs(0, 0x12, pin_to_irq(enetPins));
109 pci_assign_irqs(1, 0x00, pin_to_irq(vgaPins));
111 /* APIC Routing Fixup */
114 pdev = dev_find_device(PCI_VENDOR_ID_VIA,
115 PCI_DEVICE_ID_VIA_VT6420_SATA, 0);
116 pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x02);
117 pci_assign_irqs(0, 0x0f, pin_to_irq(sataPins));
120 // Setup PATA Override
121 pdev = dev_find_device(PCI_VENDOR_ID_VIA,
122 PCI_DEVICE_ID_VIA_82C586_1, 0);
123 pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x01);
124 pci_write_config8(pdev, PCI_INTERRUPT_LINE, 0xFF);
127 /* Route INTE-INTH through registers above, no map to INTA-INTD. */
128 pci_write_config8(dev, 0x46, 0x10);
130 /* PCI Interrupt Polarity */
131 pci_write_config8(dev, 0x54, 0x00);
133 /* PCI INTA# Routing */
134 pci_write_config8(dev, 0x55, 0x00);
136 /* PCI INTB#/C# Routing */
137 pci_write_config8(dev, 0x56, 0x00);
139 /* PCI INTD# Routing */
140 pci_write_config8(dev, 0x57, 0x00);
147 * Set up the power management capabilities directly into ACPI mode.
148 * This avoids having to handle any System Management Interrupts (SMIs).
151 static void setup_pm(device_t dev)
154 struct southbridge_via_vt8237r_config *cfg;
156 cfg = dev->chip_info;
158 /* Debounce LID and PWRBTN# Inputs for 16ms. */
159 pci_write_config8(dev, 0x80, 0x20);
161 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
162 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
164 /* Set ACPI to 9, must set IRQ 9 override to level! Set PSON gating. */
165 pci_write_config8(dev, 0x82, 0x40 | VT8237R_ACPI_IRQ);
167 #if CONFIG_EPIA_VT8237R_INIT
168 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
169 pci_write_config16(dev, 0x84, 0x3052);
171 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
172 pci_write_config16(dev, 0x84, 0x30b2);
175 /* SMI output level to low, 7.5us throttle clock */
176 pci_write_config8(dev, 0x8d, 0x18);
178 /* GP Timer Control 1s */
179 pci_write_config8(dev, 0x93, 0x88);
182 * 7 = SMBus clock from RTC 32.768KHz
183 * 5 = Internal PLL reset from susp disabled
187 if (cfg && cfg->enable_gpo3)
189 pci_write_config8(dev, 0x94, tmp);
192 * 7 = stp to sust delay 1msec
193 * 6 = SUSST# Deasserted Before PWRGD for STD
194 * 5 = Keyboard/Mouse Swap
195 * 4 = PWRGOOD reset on VT8237A/S
196 * 3 = GPO26/GPO27 is GPO
197 * 2 = Disable Alert on Lan
202 #if CONFIG_EPIA_VT8237R_INIT
203 pci_write_config8(dev, 0x95, 0xc2);
207 if (cfg->disable_gpo26_gpo27)
209 if (cfg->enable_aol_2_smb_slave)
212 pci_write_config8(dev, 0x95, tmp);
215 /* Disable GP3 timer. */
216 pci_write_config8(dev, 0x98, 0);
218 /* Enable ACPI accessm RTC signal gated with PSON. */
219 pci_write_config8(dev, 0x81, 0x84);
221 /* Clear status events. */
222 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x00);
223 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x20);
224 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x28);
225 outl(0xffffffff, VT8237R_ACPI_IO_BASE + 0x30);
227 /* Disable SCI on GPIO. */
228 outw(0x0, VT8237R_ACPI_IO_BASE + 0x22);
230 /* Disable SMI on GPIO. */
231 outw(0x0, VT8237R_ACPI_IO_BASE + 0x24);
233 /* Disable all global enable SMIs, except SW SMI */
234 outw(0x40, VT8237R_ACPI_IO_BASE + 0x2a);
236 /* Primary activity SMI disable. */
237 outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
239 /* GP timer reload on none. */
240 outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
242 /* Disable extended IO traps. */
243 outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
245 /* SCI is generated for RTC/pwrBtn/slpBtn. */
246 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
247 #if CONFIG_HAVE_ACPI_RESUME == 1
248 acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
249 printk(BIOS_DEBUG, "SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
252 /* All SMI on, both IDE buses ON, PSON rising edge. */
253 outw(0x1, VT8237R_ACPI_IO_BASE + 0x2c);
258 outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
261 static void vt8237r_init(struct device *dev)
264 struct southbridge_via_vt8237r_config *cfg;
266 cfg = dev->chip_info;
268 #if CONFIG_EPIA_VT8237R_INIT
269 printk(BIOS_SPEW, "Entering vt8237r_init, for EPIA.\n");
271 * TODO: Looks like stock BIOS can do this but causes a hang
272 * Enable SATA LED, disable special CPU Frequency Change -
273 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
274 * Setup to match EPIA default
277 enables = pci_read_config8(dev, 0xe5);
279 pci_write_config8(dev, 0xe5, enables);
282 * Enable Flash Write Access.
283 * Note EPIA-N Does not use REQ5 or PCISTP#(Hang)
285 enables = pci_read_config8(dev, 0xe4);
287 pci_write_config8(dev, 0xe4, enables);
289 /* Enables Extra RTC Ports */
290 enables = pci_read_config8(dev, 0x4E);
292 pci_write_config8(dev, 0x4E, enables);
295 printk(BIOS_SPEW, "Entering vt8237r_init.\n");
297 * Enable SATA LED, disable special CPU Frequency Change -
298 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
300 pci_write_config8(dev, 0xe5, 0x09);
304 if (cfg->enable_gpo5)
306 if (cfg->gpio15_12_dir_output)
309 /* REQ5 as PCI request input - should be together with INTE-INTH. */
310 pci_write_config8(dev, 0xe4, enables);
313 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
314 enables = pci_read_config8(dev, 0x4f);
316 pci_write_config8(dev, 0x4f, enables);
318 #if CONFIG_EPIA_VT8237R_INIT
320 * Set Read Pass Write Control Enable
322 pci_write_config8(dev, 0x48, 0x0c);
325 #if CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800 || CONFIG_SOUTHBRIDGE_VIA_SUBTYPE_K8T800_OLD
326 /* It seems that when we pair with the K8T800, we need to disable
329 pci_write_config8(dev, 0x48, 0x0c);
332 * Set Read Pass Write Control Enable
333 * (force A2 from APIC FSB to low).
335 pci_write_config8(dev, 0x48, 0x8c);
340 southbridge_init_common(dev);
342 #if !CONFIG_EPIA_VT8237R_INIT
343 /* FIXME: Intel needs more bit set for C2/C3. */
346 * Allow SLP# signal to assert LDTSTOP_L.
347 * Will work for C3 and for FID/VID change.
349 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
352 printk(BIOS_SPEW, "Leaving %s.\n", __func__);
353 printk(BIOS_SPEW, "And taking a dump:\n");
357 static void vt8237a_init(struct device *dev)
360 * FIXME: This is based on vt8237s_init() and the values the AMI
361 * BIOS on my M2V wrote to these registers (by loking
362 * at lspci -nxxx output).
367 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
368 tmp = pci_read_config8(dev, 0x4f);
370 pci_write_config8(dev, 0x4f, tmp);
373 * bit2: REQ5 as PCI request input - should be together with INTE-INTH.
374 * bit5: usb power control lines as gpio
376 pci_write_config8(dev, 0xe4, 0x24);
378 * Enable APIC wakeup from INTH
379 * Enable SATA LED, disable special CPU Frequency Change -
380 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
382 pci_write_config8(dev, 0xe5, 0x69);
384 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
385 pci_write_config8(dev, 0xec, 0x4);
387 /* Host Bus Power Management Control, maybe not needed */
388 pci_write_config8(dev, 0x8c, 0x5);
390 /* Enable HPET at VT8237R_HPET_ADDR. */
391 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
393 southbridge_init_common(dev);
395 /* Share INTE-INTH with INTA-INTD for simplicity */
396 pci_write_config8(dev, 0x46, 0x00);
398 /* FIXME: Intel needs more bit set for C2/C3. */
401 * Allow SLP# signal to assert LDTSTOP_L.
402 * Will work for C3 and for FID/VID change.
404 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
409 static void vt8237s_init(struct device *dev)
413 /* Put SPI base VT8237S_SPI_MEM_BASE. */
414 tmp = pci_read_config32(dev, 0xbc);
415 pci_write_config32(dev, 0xbc,
416 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
419 * REQ5 as PCI request input - should be together with INTE-INTH.
421 pci_write_config8(dev, 0xe4, 0x04);
423 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
424 pci_write_config8(dev, 0xec, 0x4);
426 /* Host Bus Power Management Control, maybe not needed */
427 pci_write_config8(dev, 0x8c, 0x5);
429 /* Enable HPET at VT8237R_HPET_ADDR., does not work correctly on R. */
430 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
432 southbridge_init_common(dev);
434 /* FIXME: Intel needs more bit set for C2/C3. */
437 * Allow SLP# signal to assert LDTSTOP_L.
438 * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
440 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
445 static void vt8237_common_init(struct device *dev)
448 struct southbridge_via_vt8237r_config *cfg;
449 #if !CONFIG_EPIA_VT8237R_INIT
450 unsigned char pwr_on;
453 cfg = dev->chip_info;
455 /* Enable addr/data stepping. */
456 byte = pci_read_config8(dev, PCI_COMMAND);
457 byte |= PCI_COMMAND_WAIT;
458 pci_write_config8(dev, PCI_COMMAND, byte);
460 /* EPIA-N(L) Uses CN400 for BIOS Access */
461 #if !CONFIG_EPIA_VT8237R_INIT
462 /* Enable the internal I/O decode. */
463 enables = pci_read_config8(dev, 0x6C);
465 pci_write_config8(dev, 0x6C, enables);
470 * 7 000E0000h-000EFFFFh
471 * 6 FFF00000h-FFF7FFFFh
472 * 5 FFE80000h-FFEFFFFFh
473 * 4 FFE00000h-FFE7FFFFh
474 * 3 FFD80000h-FFDFFFFFh
475 * 2 FFD00000h-FFD7FFFFh
476 * 1 FFC80000h-FFCFFFFFh
477 * 0 FFC00000h-FFC7FFFFh
478 * So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
480 pci_write_config8(dev, 0x41, 0x7f);
484 * Set bit 6 of 0x40 (I/O recovery time).
485 * IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
486 * that PCI interrupts can be properly marked as level triggered.
488 enables = pci_read_config8(dev, 0x40);
490 pci_write_config8(dev, 0x40, enables);
492 /* Line buffer control */
493 enables = pci_read_config8(dev, 0x42);
495 pci_write_config8(dev, 0x42, enables);
497 /* Delay transaction control */
498 pci_write_config8(dev, 0x43, 0xb);
500 #if CONFIG_EPIA_VT8237R_INIT
501 /* I/O recovery time, default IDE routing */
502 pci_write_config8(dev, 0x4c, 0x04);
504 /* ROM memory cycles go to LPC. */
505 pci_write_config8(dev, 0x59, 0x80);
510 * 3 | Bypass APIC De-Assert Message (1=Enable)
511 * 2 | APIC HyperTransport Mode (1=Enable)
512 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
513 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
514 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
516 pci_write_config8(dev, 0x5b, 0x9);
518 /* Set 0x58 to 0x42 APIC On and RTC Write Protect.*/
519 pci_write_config8(dev, 0x58, 0x42);
521 /* Enable serial IRQ, 6PCI clocks. */
522 pci_write_config8(dev, 0x52, 0x9);
524 /* I/O recovery time, default IDE routing */
525 pci_write_config8(dev, 0x4c, 0x44);
527 /* ROM memory cycles go to LPC. */
528 pci_write_config8(dev, 0x59, 0x80);
533 * 3 | Bypass APIC De-Assert Message (1=Enable)
534 * 2 | APIC HyperTransport Mode (1=Enable)
535 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
536 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
537 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
539 if (cfg && cfg->int_efgh_as_gpio) {
540 pci_write_config8(dev, 0x5b, 0x9);
542 pci_write_config8(dev, 0x5b, 0xb);
545 /* configure power state of the board after loss of power */
546 if (get_option(&pwr_on, "power_on_after_fail") < 0)
548 enables = pci_read_config8(dev, 0x58);
549 pci_write_config8(dev, 0x58, enables & ~0x02);
551 outb(pwr_on ? 0x00 : 0x80, 0x71);
552 pci_write_config8(dev, 0x58, enables);
554 /* Set 0x58 to 0x43 APIC and RTC. */
555 pci_write_config8(dev, 0x58, 0x43);
557 /* Enable serial IRQ, 6PCI clocks. */
558 pci_write_config8(dev, 0x52, 0x9);
560 #if CONFIG_HAVE_SMI_HANDLER
564 /* Power management setup */
571 static void vt8237r_read_resources(device_t dev)
573 struct resource *res;
575 pci_dev_read_resources(dev);
577 /* Fixed ACPI Base IO Base*/
578 res = new_resource(dev, 0x88);
579 res->base = VT8237R_ACPI_IO_BASE;
581 res->limit = 0xffffUL;
582 res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE |
583 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
585 /* Fixed EISA ECLR I/O Regs */
586 res = new_resource(dev, 3);
589 res->limit = 0xffffUL;
590 res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE |
591 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
593 /* Fixed System Management Bus I/O Resource */
594 res = new_resource(dev, 0xD0);
595 res->base = VT8237R_SMBUS_IO_BASE;
597 res->limit = 0xffffUL;
598 res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_RESERVE |
599 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
601 /* Fixed APIC resource */
602 res = new_resource(dev, 0x44);
603 res->base = IO_APIC_ADDR;
605 res->limit = 0xffffffffUL;
608 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_RESERVE |
609 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
611 /* Fixed flashrom resource */
612 res = new_resource(dev, 4);
613 res->base = 0xff000000UL;
614 res->size = 0x01000000UL; /* 16MB */
615 res->limit = 0xffffffffUL;
616 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_RESERVE |
617 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
619 res = new_resource(dev, 1);
621 res->size = 0x1000UL;
622 res->limit = 0xffffUL;
623 res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
626 static void init_keyboard(struct device *dev)
628 u8 regval = pci_read_config8(dev, 0x51);
633 static void southbridge_init_common(struct device *dev)
635 vt8237_common_init(dev);
636 pci_routing_fixup(dev);
637 setup_ioapic(IO_APIC_ADDR, VT8237R_APIC_ID);
643 static void vt8237_set_subsystem(device_t dev, unsigned vendor, unsigned device)
645 pci_write_config16(dev, 0x70, vendor);
646 pci_write_config16(dev, 0x72, device);
649 static struct pci_operations lops_pci = {
650 .set_subsystem = vt8237_set_subsystem,
653 static const struct device_operations vt8237r_lpc_ops_s = {
654 .read_resources = vt8237r_read_resources,
655 .set_resources = pci_dev_set_resources,
656 .enable_resources = pci_dev_enable_resources,
657 .init = vt8237s_init,
658 .scan_bus = scan_static_bus,
659 .ops_pci = &lops_pci,
662 static const struct device_operations vt8237r_lpc_ops_r = {
663 .read_resources = vt8237r_read_resources,
664 .set_resources = pci_dev_set_resources,
665 .enable_resources = pci_dev_enable_resources,
666 .init = vt8237r_init,
667 .scan_bus = scan_static_bus,
668 .ops_pci = &lops_pci,
671 static const struct device_operations vt8237r_lpc_ops_a = {
672 .read_resources = vt8237r_read_resources,
673 .set_resources = pci_dev_set_resources,
674 .enable_resources = pci_dev_enable_resources,
675 .init = vt8237a_init,
676 .scan_bus = scan_static_bus,
677 .ops_pci = &lops_pci,
680 static const struct pci_driver lpc_driver_r __pci_driver = {
681 .ops = &vt8237r_lpc_ops_r,
682 .vendor = PCI_VENDOR_ID_VIA,
683 .device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
686 static const struct pci_driver lpc_driver_a __pci_driver = {
687 .ops = &vt8237r_lpc_ops_a,
688 .vendor = PCI_VENDOR_ID_VIA,
689 .device = PCI_DEVICE_ID_VIA_VT8237A_LPC,
692 static const struct pci_driver lpc_driver_s __pci_driver = {
693 .ops = &vt8237r_lpc_ops_s,
694 .vendor = PCI_VENDOR_ID_VIA,
695 .device = PCI_DEVICE_ID_VIA_VT8237S_LPC,