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
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. */
222 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2a);
224 /* All SMI off, both IDE buses ON, PSON rising edge. */
225 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2c);
227 /* Primary activity SMI disable. */
228 outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
230 /* GP timer reload on none. */
231 outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
233 /* Disable extended IO traps. */
234 outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
236 /* SCI is generated for RTC/pwrBtn/slpBtn. */
237 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
238 #if CONFIG_HAVE_ACPI_RESUME == 1
239 acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
240 printk(BIOS_DEBUG, "SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
245 outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
248 static void vt8237r_init(struct device *dev)
252 #if CONFIG_EPIA_VT8237R_INIT
253 printk(BIOS_SPEW, "Entering vt8237r_init, for EPIA.\n");
255 * TODO: Looks like stock BIOS can do this but causes a hang
256 * Enable SATA LED, disable special CPU Frequency Change -
257 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
258 * Setup to match EPIA default
261 enables = pci_read_config8(dev, 0xe5);
263 pci_write_config8(dev, 0xe5, enables);
266 * Enable Flash Write Access.
267 * Note EPIA-N Does not use REQ5 or PCISTP#(Hang)
269 enables = pci_read_config8(dev, 0xe4);
271 pci_write_config8(dev, 0xe4, enables);
273 /* Enables Extra RTC Ports */
274 enables = pci_read_config8(dev, 0x4E);
276 pci_write_config8(dev, 0x4E, enables);
279 printk(BIOS_SPEW, "Entering vt8237r_init.\n");
281 * Enable SATA LED, disable special CPU Frequency Change -
282 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
284 pci_write_config8(dev, 0xe5, 0x09);
286 /* REQ5 as PCI request input - should be together with INTE-INTH. */
287 pci_write_config8(dev, 0xe4, 0x4);
290 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
291 enables = pci_read_config8(dev, 0x4f);
293 pci_write_config8(dev, 0x4f, enables);
295 #if CONFIG_EPIA_VT8237R_INIT
297 * Set Read Pass Write Control Enable
299 pci_write_config8(dev, 0x48, 0x0c);
302 * Set Read Pass Write Control Enable
303 * (force A2 from APIC FSB to low).
305 pci_write_config8(dev, 0x48, 0x8c);
308 southbridge_init_common(dev);
310 #if !CONFIG_EPIA_VT8237R_INIT
311 /* FIXME: Intel needs more bit set for C2/C3. */
314 * Allow SLP# signal to assert LDTSTOP_L.
315 * Will work for C3 and for FID/VID change.
317 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
320 printk(BIOS_SPEW, "Leaving %s.\n", __func__);
323 static void vt8237s_init(struct device *dev)
327 /* Put SPI base VT8237S_SPI_MEM_BASE. */
328 tmp = pci_read_config32(dev, 0xbc);
329 pci_write_config32(dev, 0xbc,
330 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
333 * REQ5 as PCI request input - should be together with INTE-INTH.
335 pci_write_config8(dev, 0xe4, 0x04);
337 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
338 pci_write_config8(dev, 0xec, 0x4);
340 /* Host Bus Power Management Control, maybe not needed */
341 pci_write_config8(dev, 0x8c, 0x5);
343 /* Enable HPET at VT8237R_HPET_ADDR., does not work correctly on R. */
344 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
346 southbridge_init_common(dev);
348 /* FIXME: Intel needs more bit set for C2/C3. */
351 * Allow SLP# signal to assert LDTSTOP_L.
352 * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
354 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
359 static void vt8237_common_init(struct device *dev)
363 /* Enable addr/data stepping. */
364 byte = pci_read_config8(dev, PCI_COMMAND);
365 byte |= PCI_COMMAND_WAIT;
366 pci_write_config8(dev, PCI_COMMAND, byte);
368 /* EPIA-N(L) Uses CN400 for BIOS Access */
369 #if !CONFIG_EPIA_VT8237R_INIT
370 /* Enable the internal I/O decode. */
371 enables = pci_read_config8(dev, 0x6C);
373 pci_write_config8(dev, 0x6C, enables);
378 * 7 000E0000h-000EFFFFh
379 * 6 FFF00000h-FFF7FFFFh
380 * 5 FFE80000h-FFEFFFFFh
381 * 4 FFE00000h-FFE7FFFFh
382 * 3 FFD80000h-FFDFFFFFh
383 * 2 FFD00000h-FFD7FFFFh
384 * 1 FFC80000h-FFCFFFFFh
385 * 0 FFC00000h-FFC7FFFFh
386 * So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
388 pci_write_config8(dev, 0x41, 0x7f);
392 * Set bit 6 of 0x40 (I/O recovery time).
393 * IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
394 * that PCI interrupts can be properly marked as level triggered.
396 enables = pci_read_config8(dev, 0x40);
398 pci_write_config8(dev, 0x40, enables);
400 /* Line buffer control */
401 enables = pci_read_config8(dev, 0x42);
403 pci_write_config8(dev, 0x42, enables);
405 /* Delay transaction control */
406 pci_write_config8(dev, 0x43, 0xb);
408 #if CONFIG_EPIA_VT8237R_INIT
409 /* I/O recovery time, default IDE routing */
410 pci_write_config8(dev, 0x4c, 0x04);
412 /* ROM memory cycles go to LPC. */
413 pci_write_config8(dev, 0x59, 0x80);
418 * 3 | Bypass APIC De-Assert Message (1=Enable)
419 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
420 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
421 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
423 pci_write_config8(dev, 0x5b, 0x9);
425 /* Set 0x58 to 0x42 APIC On and RTC Write Protect.*/
426 pci_write_config8(dev, 0x58, 0x42);
428 /* Enable serial IRQ, 6PCI clocks. */
429 pci_write_config8(dev, 0x52, 0x9);
431 /* I/O recovery time, default IDE routing */
432 pci_write_config8(dev, 0x4c, 0x44);
434 /* ROM memory cycles go to LPC. */
435 pci_write_config8(dev, 0x59, 0x80);
440 * 3 | Bypass APIC De-Assert Message (1=Enable)
441 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
442 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
443 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
445 pci_write_config8(dev, 0x5b, 0xb);
447 /* Set 0x58 to 0x43 APIC and RTC. */
448 pci_write_config8(dev, 0x58, 0x43);
450 /* Enable serial IRQ, 6PCI clocks. */
451 pci_write_config8(dev, 0x52, 0x9);
455 /* Power management setup */
462 static void vt8237r_read_resources(device_t dev)
464 struct resource *res;
466 pci_dev_read_resources(dev);
468 /* Fixed ACPI Base IO Base*/
469 res = new_resource(dev, 0x88);
470 res->base = VT8237R_ACPI_IO_BASE;
472 res->limit = 0xffffUL;
473 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
474 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
476 /* Fixed EISA ECLR I/O Regs */
477 res = new_resource(dev, 3);
480 res->limit = 0xffffUL;
481 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
482 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
484 /* Fixed System Management Bus I/O Resource */
485 res = new_resource(dev, 0xD0);
486 res->base = VT8237R_SMBUS_IO_BASE;
488 res->limit = 0xffffUL;
489 res->flags = IORESOURCE_IO | IORESOURCE_FIXED |
490 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
492 /* Fixed APIC resource */
493 res = new_resource(dev, 0x44);
494 res->base = VT8237R_APIC_BASE;
496 res->limit = 0xffffffffUL;
499 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
500 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
502 res = new_resource(dev, 1);
504 res->size = 0x1000UL;
505 res->limit = 0xffffUL;
506 res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
510 * The VT8237R is not a PCI bridge and has no resources of its own (other
511 * than standard PC I/O addresses), however it does control the ISA bus
512 * and so we need to manually call enable childrens resources on that bus.
514 static void vt8237r_enable_resources(device_t dev)
516 pci_dev_enable_resources(dev);
517 enable_childrens_resources(dev);
520 static void init_keyboard(struct device *dev)
522 u8 regval = pci_read_config8(dev, 0x51);
527 static void southbridge_init_common(struct device *dev)
529 vt8237_common_init(dev);
530 pci_routing_fixup(dev);
531 setup_ioapic(VT8237R_APIC_BASE, VT8237R_APIC_ID);
536 static const struct device_operations vt8237r_lpc_ops_s = {
537 .read_resources = vt8237r_read_resources,
538 .set_resources = pci_dev_set_resources,
539 .enable_resources = vt8237r_enable_resources,
540 .init = &vt8237s_init,
541 .scan_bus = scan_static_bus,
544 static const struct device_operations vt8237r_lpc_ops_r = {
545 .read_resources = vt8237r_read_resources,
546 .set_resources = pci_dev_set_resources,
547 .enable_resources = vt8237r_enable_resources,
548 .init = &vt8237r_init,
549 .scan_bus = scan_static_bus,
552 static const struct pci_driver lpc_driver_r __pci_driver = {
553 .ops = &vt8237r_lpc_ops_r,
554 .vendor = PCI_VENDOR_ID_VIA,
555 .device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
558 static const struct pci_driver lpc_driver_s __pci_driver = {
559 .ops = &vt8237r_lpc_ops_s,
560 .vendor = PCI_VENDOR_ID_VIA,
561 .device = PCI_DEVICE_ID_VIA_VT8237S_LPC,