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 v2 as published by
9 * the Free Software Foundation.
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>
31 #include <pc80/keyboard.h>
32 #include <pc80/i8259.h>
37 extern void dump_south(device_t dev);
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
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 extern u8 acpi_slp_type;
154 static void setup_pm(device_t dev)
157 /* Debounce LID and PWRBTN# Inputs for 16ms. */
158 pci_write_config8(dev, 0x80, 0x20);
160 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
161 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
163 /* Set ACPI to 9, must set IRQ 9 override to level! Set PSON gating. */
164 pci_write_config8(dev, 0x82, 0x40 | VT8237R_ACPI_IRQ);
166 #if CONFIG_EPIA_VT8237R_INIT
167 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
168 pci_write_config16(dev, 0x84, 0x3052);
170 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
171 pci_write_config16(dev, 0x84, 0x30b2);
174 /* SMI output level to low, 7.5us throttle clock */
175 pci_write_config8(dev, 0x8d, 0x18);
177 /* GP Timer Control 1s */
178 pci_write_config8(dev, 0x93, 0x88);
181 * 7 = SMBus clock from RTC 32.768KHz
182 * 5 = Internal PLL reset from susp disabled
185 pci_write_config8(dev, 0x94, 0xa0);
188 * 7 = stp to sust delay 1msec
189 * 6 = SUSST# Deasserted Before PWRGD for STD
190 * 5 = Keyboard/Mouse Swap
191 * 4 = PWRGOOD reset on VT8237A/S
192 * 3 = GPO26/GPO27 is GPO
193 * 2 = Disable Alert on Lan
198 #if CONFIG_EPIA_VT8237R_INIT
199 pci_write_config8(dev, 0x95, 0xc2);
201 pci_write_config8(dev, 0x95, 0xcc);
204 /* Disable GP3 timer. */
205 pci_write_config8(dev, 0x98, 0);
207 /* Enable ACPI accessm RTC signal gated with PSON. */
208 pci_write_config8(dev, 0x81, 0x84);
210 /* Clear status events. */
211 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x00);
212 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x20);
213 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x28);
214 outl(0xffffffff, VT8237R_ACPI_IO_BASE + 0x30);
216 /* Disable SCI on GPIO. */
217 outw(0x0, VT8237R_ACPI_IO_BASE + 0x22);
219 /* Disable SMI on GPIO. */
220 outw(0x0, VT8237R_ACPI_IO_BASE + 0x24);
222 /* Disable all global enable SMIs. */
223 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2a);
225 /* All SMI off, both IDE buses ON, PSON rising edge. */
226 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2c);
228 /* Primary activity SMI disable. */
229 outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
231 /* GP timer reload on none. */
232 outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
234 /* Disable extended IO traps. */
235 outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
237 /* SCI is generated for RTC/pwrBtn/slpBtn. */
238 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
239 #if CONFIG_HAVE_ACPI_RESUME == 1
240 acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
241 printk_debug("SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
246 outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
249 static void vt8237r_init(struct device *dev)
253 #if CONFIG_EPIA_VT8237R_INIT
254 printk_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_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 * Set Read Pass Write Control Enable
304 * (force A2 from APIC FSB to low).
306 pci_write_config8(dev, 0x48, 0x8c);
309 southbridge_init_common(dev);
311 #if !CONFIG_EPIA_VT8237R_INIT
312 /* FIXME: Intel needs more bit set for C2/C3. */
315 * Allow SLP# signal to assert LDTSTOP_L.
316 * Will work for C3 and for FID/VID change.
318 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
321 printk_spew("Leaving %s.\n", __func__);
324 static void vt8237s_init(struct device *dev)
328 /* Put SPI base VT8237S_SPI_MEM_BASE. */
329 tmp = pci_read_config32(dev, 0xbc);
330 pci_write_config32(dev, 0xbc,
331 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
334 * REQ5 as PCI request input - should be together with INTE-INTH.
336 pci_write_config8(dev, 0xe4, 0x04);
338 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
339 pci_write_config8(dev, 0xec, 0x4);
341 /* Host Bus Power Management Control, maybe not needed */
342 pci_write_config8(dev, 0x8c, 0x5);
344 /* Enable HPET at VT8237R_HPET_ADDR., does not work correctly on R. */
345 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
347 southbridge_init_common(dev);
349 /* FIXME: Intel needs more bit set for C2/C3. */
352 * Allow SLP# signal to assert LDTSTOP_L.
353 * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
355 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
360 static void vt8237_common_init(struct device *dev)
364 /* Enable addr/data stepping. */
365 byte = pci_read_config8(dev, PCI_COMMAND);
366 byte |= PCI_COMMAND_WAIT;
367 pci_write_config8(dev, PCI_COMMAND, byte);
369 /* EPIA-N(L) Uses CN400 for BIOS Access */
370 #if !CONFIG_EPIA_VT8237R_INIT
371 /* Enable the internal I/O decode. */
372 enables = pci_read_config8(dev, 0x6C);
374 pci_write_config8(dev, 0x6C, enables);
379 * 7 000E0000h-000EFFFFh
380 * 6 FFF00000h-FFF7FFFFh
381 * 5 FFE80000h-FFEFFFFFh
382 * 4 FFE00000h-FFE7FFFFh
383 * 3 FFD80000h-FFDFFFFFh
384 * 2 FFD00000h-FFD7FFFFh
385 * 1 FFC80000h-FFCFFFFFh
386 * 0 FFC00000h-FFC7FFFFh
387 * So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
389 pci_write_config8(dev, 0x41, 0x7f);
393 * Set bit 6 of 0x40 (I/O recovery time).
394 * IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
395 * that PCI interrupts can be properly marked as level triggered.
397 enables = pci_read_config8(dev, 0x40);
399 pci_write_config8(dev, 0x40, enables);
401 /* Line buffer control */
402 enables = pci_read_config8(dev, 0x42);
404 pci_write_config8(dev, 0x42, enables);
406 /* Delay transaction control */
407 pci_write_config8(dev, 0x43, 0xb);
409 #if CONFIG_EPIA_VT8237R_INIT
410 /* I/O recovery time, default IDE routing */
411 pci_write_config8(dev, 0x4c, 0x04);
413 /* ROM memory cycles go to LPC. */
414 pci_write_config8(dev, 0x59, 0x80);
419 * 3 | Bypass APIC De-Assert Message (1=Enable)
420 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
421 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
422 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
424 pci_write_config8(dev, 0x5b, 0x9);
426 /* Set 0x58 to 0x42 APIC On and RTC Write Protect.*/
427 pci_write_config8(dev, 0x58, 0x42);
429 /* Enable serial IRQ, 6PCI clocks. */
430 pci_write_config8(dev, 0x52, 0x9);
432 /* I/O recovery time, default IDE routing */
433 pci_write_config8(dev, 0x4c, 0x44);
435 /* ROM memory cycles go to LPC. */
436 pci_write_config8(dev, 0x59, 0x80);
441 * 3 | Bypass APIC De-Assert Message (1=Enable)
442 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
443 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
444 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
446 pci_write_config8(dev, 0x5b, 0xb);
448 /* Set 0x58 to 0x43 APIC and RTC. */
449 pci_write_config8(dev, 0x58, 0x43);
451 /* Enable serial IRQ, 6PCI clocks. */
452 pci_write_config8(dev, 0x52, 0x9);
456 /* Power management setup */
463 static void vt8237r_read_resources(device_t dev)
465 struct resource *res;
467 pci_dev_read_resources(dev);
469 /* Fixed ACPI Base IO Base*/
470 res = new_resource(dev, 0x88);
471 res->base = VT8237R_ACPI_IO_BASE;
473 res->limit = 0xffffUL;
474 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
475 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
477 /* Fixed EISA ECLR I/O Regs */
478 res = new_resource(dev, 3);
481 res->limit = 0xffffUL;
482 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
483 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
485 /* Fixed System Management Bus I/O Resource */
486 res = new_resource(dev, 0xD0);
487 res->base = VT8237R_SMBUS_IO_BASE;
489 res->limit = 0xffffUL;
490 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
491 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
493 /* Fixed APIC resource */
494 res = new_resource(dev, 0x44);
495 res->base = VT8237R_APIC_BASE;
497 res->limit = 0xffffffffUL;
500 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
501 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
503 res = new_resource(dev, 1);
505 res->size = 0x1000UL;
506 res->limit = 0xffffUL;
507 res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
511 * The VT8237R is not a PCI bridge and has no resources of its own (other
512 * than standard PC I/O addresses), however it does control the ISA bus
513 * and so we need to manually call enable childrens resources on that bus.
515 static void vt8237r_enable_resources(device_t dev)
517 pci_dev_enable_resources(dev);
518 enable_childrens_resources(dev);
521 static void init_keyboard(struct device *dev)
523 u8 regval = pci_read_config8(dev, 0x51);
525 init_pc_keyboard(0x60, 0x64, 0);
528 static void southbridge_init_common(struct device *dev)
530 vt8237_common_init(dev);
531 pci_routing_fixup(dev);
532 setup_ioapic(VT8237R_APIC_BASE, VT8237R_APIC_ID);
537 static const struct device_operations vt8237r_lpc_ops_s = {
538 .read_resources = vt8237r_read_resources,
539 .set_resources = pci_dev_set_resources,
540 .enable_resources = vt8237r_enable_resources,
541 .init = &vt8237s_init,
542 .scan_bus = scan_static_bus,
545 static const struct device_operations vt8237r_lpc_ops_r = {
546 .read_resources = vt8237r_read_resources,
547 .set_resources = pci_dev_set_resources,
548 .enable_resources = vt8237r_enable_resources,
549 .init = &vt8237r_init,
550 .scan_bus = scan_static_bus,
553 static const struct pci_driver lpc_driver_r __pci_driver = {
554 .ops = &vt8237r_lpc_ops_r,
555 .vendor = PCI_VENDOR_ID_VIA,
556 .device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
559 static const struct pci_driver lpc_driver_s __pci_driver = {
560 .ops = &vt8237r_lpc_ops_s,
561 .vendor = PCI_VENDOR_ID_VIA,
562 .device = PCI_DEVICE_ID_VIA_VT8237S_LPC,