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>
31 #include <pc80/keyboard.h>
32 #include <pc80/i8259.h>
37 static void southbridge_init_common(struct device *dev);
39 #if CONFIG_EPIA_VT8237R_INIT
40 /* Interrupts for INT# A B C D */
41 static const unsigned char pciIrqs[4] = { 10, 11, 12, 0};
43 /* Interrupt Assignments for Pins 1 2 3 4 */
44 static const unsigned char sataPins[4] = { 'A','B','C','D'};
45 static const unsigned char vgaPins[4] = { 'A','B','C','D'};
46 static const unsigned char usbPins[4] = { 'A','B','C','D'};
47 static const unsigned char enetPins[4] = { 'A','B','C','D'};
48 static const unsigned char vt8237Pins[4] = { 'A','B','C','D'};
49 static const unsigned char slotPins[4] = { 'C','D','A','B'};
50 static const unsigned char riserPins[4] = { 'D','C','B','A'};
52 static unsigned char *pin_to_irq(const unsigned char *pin)
54 static unsigned char Irqs[4];
56 for (i = 0 ; i < 4 ; i++)
57 Irqs[i] = pciIrqs[ pin[i] - 'A' ];
63 /** Set up PCI IRQ routing, route everything through APIC. */
64 static void pci_routing_fixup(struct device *dev)
66 #if CONFIG_EPIA_VT8237R_INIT
70 /* PCI PNP Interrupt Routing INTE/F - disable */
71 pci_write_config8(dev, 0x44, 0x00);
73 /* PCI PNP Interrupt Routing INTG/H - disable */
74 pci_write_config8(dev, 0x45, 0x00);
76 /* Gate Interrupts until RAM Writes are flushed */
77 pci_write_config8(dev, 0x49, 0x20);
79 #if CONFIG_EPIA_VT8237R_INIT
81 /* Share INTE-INTH with INTA-INTD as per stock BIOS. */
82 pci_write_config8(dev, 0x46, 0x00);
84 /* setup PCI IRQ routing (For PCI Slot)*/
85 pci_write_config8(dev, 0x55, pciIrqs[0] << 4);
86 pci_write_config8(dev, 0x56, pciIrqs[1] | (pciIrqs[2] << 4) );
87 pci_write_config8(dev, 0x57, pciIrqs[3] << 4);
89 /* PCI Routing Fixup */
92 pci_assign_irqs(0, 0x14, pin_to_irq(slotPins));
94 // Via 2 slot riser card 2nd slot
95 pci_assign_irqs(0, 0x13, pin_to_irq(riserPins));
98 pci_assign_irqs(0, 0x10, pin_to_irq(usbPins));
100 //Setup VT8237R Sound
101 pci_assign_irqs(0, 0x11, pin_to_irq(vt8237Pins));
104 pci_assign_irqs(0, 0x12, pin_to_irq(enetPins));
107 pci_assign_irqs(1, 0x00, pin_to_irq(vgaPins));
109 /* APIC Routing Fixup */
112 pdev = dev_find_device(PCI_VENDOR_ID_VIA,
113 PCI_DEVICE_ID_VIA_VT6420_SATA, 0);
114 pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x02);
115 pci_assign_irqs(0, 0x0f, pin_to_irq(sataPins));
118 // Setup PATA Override
119 pdev = dev_find_device(PCI_VENDOR_ID_VIA,
120 PCI_DEVICE_ID_VIA_82C586_1, 0);
121 pci_write_config8(pdev, PCI_INTERRUPT_PIN, 0x01);
122 pci_write_config8(pdev, PCI_INTERRUPT_LINE, 0xFF);
125 /* Route INTE-INTH through registers above, no map to INTA-INTD. */
126 pci_write_config8(dev, 0x46, 0x10);
128 /* PCI Interrupt Polarity */
129 pci_write_config8(dev, 0x54, 0x00);
131 /* PCI INTA# Routing */
132 pci_write_config8(dev, 0x55, 0x00);
134 /* PCI INTB#/C# Routing */
135 pci_write_config8(dev, 0x56, 0x00);
137 /* PCI INTD# Routing */
138 pci_write_config8(dev, 0x57, 0x00);
145 * Set up the power management capabilities directly into ACPI mode.
146 * This avoids having to handle any System Management Interrupts (SMIs).
149 extern u8 acpi_slp_type;
152 static void setup_pm(device_t dev)
155 /* Debounce LID and PWRBTN# Inputs for 16ms. */
156 pci_write_config8(dev, 0x80, 0x20);
158 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
159 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
161 /* Set ACPI to 9, must set IRQ 9 override to level! Set PSON gating. */
162 pci_write_config8(dev, 0x82, 0x40 | VT8237R_ACPI_IRQ);
164 #if CONFIG_EPIA_VT8237R_INIT
165 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
166 pci_write_config16(dev, 0x84, 0x3052);
168 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
169 pci_write_config16(dev, 0x84, 0x30b2);
172 /* SMI output level to low, 7.5us throttle clock */
173 pci_write_config8(dev, 0x8d, 0x18);
175 /* GP Timer Control 1s */
176 pci_write_config8(dev, 0x93, 0x88);
179 * 7 = SMBus clock from RTC 32.768KHz
180 * 5 = Internal PLL reset from susp disabled
183 pci_write_config8(dev, 0x94, 0xa0);
186 * 7 = stp to sust delay 1msec
187 * 6 = SUSST# Deasserted Before PWRGD for STD
188 * 5 = Keyboard/Mouse Swap
189 * 4 = PWRGOOD reset on VT8237A/S
190 * 3 = GPO26/GPO27 is GPO
191 * 2 = Disable Alert on Lan
196 #if CONFIG_EPIA_VT8237R_INIT
197 pci_write_config8(dev, 0x95, 0xc2);
199 pci_write_config8(dev, 0x95, 0xcc);
202 /* Disable GP3 timer. */
203 pci_write_config8(dev, 0x98, 0);
205 /* Enable ACPI accessm RTC signal gated with PSON. */
206 pci_write_config8(dev, 0x81, 0x84);
208 /* Clear status events. */
209 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x00);
210 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x20);
211 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x28);
212 outl(0xffffffff, VT8237R_ACPI_IO_BASE + 0x30);
214 /* Disable SCI on GPIO. */
215 outw(0x0, VT8237R_ACPI_IO_BASE + 0x22);
217 /* Disable SMI on GPIO. */
218 outw(0x0, VT8237R_ACPI_IO_BASE + 0x24);
220 /* Disable all global enable SMIs. */
221 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2a);
223 /* All SMI off, both IDE buses ON, PSON rising edge. */
224 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2c);
226 /* Primary activity SMI disable. */
227 outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
229 /* GP timer reload on none. */
230 outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
232 /* Disable extended IO traps. */
233 outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
235 /* SCI is generated for RTC/pwrBtn/slpBtn. */
236 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
237 #if CONFIG_HAVE_ACPI_RESUME == 1
238 acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
239 printk(BIOS_DEBUG, "SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
244 outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
247 static void vt8237r_init(struct device *dev)
251 #if CONFIG_EPIA_VT8237R_INIT
252 printk(BIOS_SPEW, "Entering vt8237r_init, for EPIA.\n");
254 * TODO: Looks like stock BIOS can do this but causes a hang
255 * Enable SATA LED, disable special CPU Frequency Change -
256 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
257 * Setup to match EPIA default
260 enables = pci_read_config8(dev, 0xe5);
262 pci_write_config8(dev, 0xe5, enables);
265 * Enable Flash Write Access.
266 * Note EPIA-N Does not use REQ5 or PCISTP#(Hang)
268 enables = pci_read_config8(dev, 0xe4);
270 pci_write_config8(dev, 0xe4, enables);
272 /* Enables Extra RTC Ports */
273 enables = pci_read_config8(dev, 0x4E);
275 pci_write_config8(dev, 0x4E, enables);
278 printk(BIOS_SPEW, "Entering vt8237r_init.\n");
280 * Enable SATA LED, disable special CPU Frequency Change -
281 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
283 pci_write_config8(dev, 0xe5, 0x09);
285 /* REQ5 as PCI request input - should be together with INTE-INTH. */
286 pci_write_config8(dev, 0xe4, 0x4);
289 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
290 enables = pci_read_config8(dev, 0x4f);
292 pci_write_config8(dev, 0x4f, enables);
294 #if CONFIG_EPIA_VT8237R_INIT
296 * Set Read Pass Write Control Enable
298 pci_write_config8(dev, 0x48, 0x0c);
301 * Set Read Pass Write Control Enable
302 * (force A2 from APIC FSB to low).
304 pci_write_config8(dev, 0x48, 0x8c);
307 southbridge_init_common(dev);
309 #if !CONFIG_EPIA_VT8237R_INIT
310 /* FIXME: Intel needs more bit set for C2/C3. */
313 * Allow SLP# signal to assert LDTSTOP_L.
314 * Will work for C3 and for FID/VID change.
316 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
319 printk(BIOS_SPEW, "Leaving %s.\n", __func__);
322 static void vt8237s_init(struct device *dev)
326 /* Put SPI base VT8237S_SPI_MEM_BASE. */
327 tmp = pci_read_config32(dev, 0xbc);
328 pci_write_config32(dev, 0xbc,
329 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
332 * REQ5 as PCI request input - should be together with INTE-INTH.
334 pci_write_config8(dev, 0xe4, 0x04);
336 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
337 pci_write_config8(dev, 0xec, 0x4);
339 /* Host Bus Power Management Control, maybe not needed */
340 pci_write_config8(dev, 0x8c, 0x5);
342 /* Enable HPET at VT8237R_HPET_ADDR., does not work correctly on R. */
343 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
345 southbridge_init_common(dev);
347 /* FIXME: Intel needs more bit set for C2/C3. */
350 * Allow SLP# signal to assert LDTSTOP_L.
351 * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
353 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
358 static void vt8237_common_init(struct device *dev)
362 /* Enable addr/data stepping. */
363 byte = pci_read_config8(dev, PCI_COMMAND);
364 byte |= PCI_COMMAND_WAIT;
365 pci_write_config8(dev, PCI_COMMAND, byte);
367 /* EPIA-N(L) Uses CN400 for BIOS Access */
368 #if !CONFIG_EPIA_VT8237R_INIT
369 /* Enable the internal I/O decode. */
370 enables = pci_read_config8(dev, 0x6C);
372 pci_write_config8(dev, 0x6C, enables);
377 * 7 000E0000h-000EFFFFh
378 * 6 FFF00000h-FFF7FFFFh
379 * 5 FFE80000h-FFEFFFFFh
380 * 4 FFE00000h-FFE7FFFFh
381 * 3 FFD80000h-FFDFFFFFh
382 * 2 FFD00000h-FFD7FFFFh
383 * 1 FFC80000h-FFCFFFFFh
384 * 0 FFC00000h-FFC7FFFFh
385 * So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
387 pci_write_config8(dev, 0x41, 0x7f);
391 * Set bit 6 of 0x40 (I/O recovery time).
392 * IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
393 * that PCI interrupts can be properly marked as level triggered.
395 enables = pci_read_config8(dev, 0x40);
397 pci_write_config8(dev, 0x40, enables);
399 /* Line buffer control */
400 enables = pci_read_config8(dev, 0x42);
402 pci_write_config8(dev, 0x42, enables);
404 /* Delay transaction control */
405 pci_write_config8(dev, 0x43, 0xb);
407 #if CONFIG_EPIA_VT8237R_INIT
408 /* I/O recovery time, default IDE routing */
409 pci_write_config8(dev, 0x4c, 0x04);
411 /* ROM memory cycles go to LPC. */
412 pci_write_config8(dev, 0x59, 0x80);
417 * 3 | Bypass APIC De-Assert Message (1=Enable)
418 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
419 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
420 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
422 pci_write_config8(dev, 0x5b, 0x9);
424 /* Set 0x58 to 0x42 APIC On and RTC Write Protect.*/
425 pci_write_config8(dev, 0x58, 0x42);
427 /* Enable serial IRQ, 6PCI clocks. */
428 pci_write_config8(dev, 0x52, 0x9);
430 /* I/O recovery time, default IDE routing */
431 pci_write_config8(dev, 0x4c, 0x44);
433 /* ROM memory cycles go to LPC. */
434 pci_write_config8(dev, 0x59, 0x80);
439 * 3 | Bypass APIC De-Assert Message (1=Enable)
440 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
441 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
442 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
444 pci_write_config8(dev, 0x5b, 0xb);
446 /* Set 0x58 to 0x43 APIC and RTC. */
447 pci_write_config8(dev, 0x58, 0x43);
449 /* Enable serial IRQ, 6PCI clocks. */
450 pci_write_config8(dev, 0x52, 0x9);
454 /* Power management setup */
461 static void vt8237r_read_resources(device_t dev)
463 struct resource *res;
465 pci_dev_read_resources(dev);
467 /* Fixed ACPI Base IO Base*/
468 res = new_resource(dev, 0x88);
469 res->base = VT8237R_ACPI_IO_BASE;
471 res->limit = 0xffffUL;
472 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
473 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
475 /* Fixed EISA ECLR I/O Regs */
476 res = new_resource(dev, 3);
479 res->limit = 0xffffUL;
480 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
481 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
483 /* Fixed System Management Bus I/O Resource */
484 res = new_resource(dev, 0xD0);
485 res->base = VT8237R_SMBUS_IO_BASE;
487 res->limit = 0xffffUL;
488 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
489 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
491 /* Fixed APIC resource */
492 res = new_resource(dev, 0x44);
493 res->base = VT8237R_APIC_BASE;
495 res->limit = 0xffffffffUL;
498 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
499 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
501 res = new_resource(dev, 1);
503 res->size = 0x1000UL;
504 res->limit = 0xffffUL;
505 res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
508 static void init_keyboard(struct device *dev)
510 u8 regval = pci_read_config8(dev, 0x51);
515 static void southbridge_init_common(struct device *dev)
517 vt8237_common_init(dev);
518 pci_routing_fixup(dev);
519 setup_ioapic(VT8237R_APIC_BASE, VT8237R_APIC_ID);
524 static const struct device_operations vt8237r_lpc_ops_s = {
525 .read_resources = vt8237r_read_resources,
526 .set_resources = pci_dev_set_resources,
527 .enable_resources = pci_dev_enable_resources,
528 .init = vt8237s_init,
529 .scan_bus = scan_static_bus,
532 static const struct device_operations vt8237r_lpc_ops_r = {
533 .read_resources = vt8237r_read_resources,
534 .set_resources = pci_dev_set_resources,
535 .enable_resources = pci_dev_enable_resources,
536 .init = vt8237r_init,
537 .scan_bus = scan_static_bus,
540 static const struct pci_driver lpc_driver_r __pci_driver = {
541 .ops = &vt8237r_lpc_ops_r,
542 .vendor = PCI_VENDOR_ID_VIA,
543 .device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
546 static const struct pci_driver lpc_driver_s __pci_driver = {
547 .ops = &vt8237r_lpc_ops_s,
548 .vendor = PCI_VENDOR_ID_VIA,
549 .device = PCI_DEVICE_ID_VIA_VT8237S_LPC,