2 * This file is part of the coreboot project.
4 * Copyright (C) 2007, 2008 Rudolf Marek <r.marek@assembler.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 /* Inspiration from other VIA SB code. */
23 #include <console/console.h>
24 #include <device/device.h>
25 #include <device/pci.h>
26 #include <device/pci_ids.h>
27 #include <pc80/mc146818rtc.h>
28 #include <cpu/x86/lapic.h>
29 #include <pc80/keyboard.h>
30 #include <pc80/i8259.h>
35 #define ALL (0xff << 24)
37 #define DISABLED (1 << 16)
38 #define ENABLED (0 << 16)
39 #define TRIGGER_EDGE (0 << 15)
40 #define TRIGGER_LEVEL (1 << 15)
41 #define POLARITY_HIGH (0 << 13)
42 #define POLARITY_LOW (1 << 13)
43 #define PHYSICAL_DEST (0 << 11)
44 #define LOGICAL_DEST (1 << 11)
45 #define ExtINT (7 << 8)
50 extern void dump_south(device_t dev);
52 static struct ioapicreg {
57 /* IO-APIC virtual wire mode configuration. */
58 /* mask, trigger, polarity, destination, delivery, vector */
59 {0, ENABLED | TRIGGER_EDGE | POLARITY_HIGH | PHYSICAL_DEST |
86 static void setup_ioapic(u32 ioapic_base)
88 u32 value_low, value_high, val;
92 /* All delivered to CPU0. */
93 ioapic_table[0].value_high = (lapicid()) << (56 - 32);
94 l = (u32 *)ioapic_base;
96 /* Set APIC to FSB message bus. */
99 l[4] = (val & 0xFFFFFE) | 1;
101 /* Set APIC ADDR - this will be VT8237R_APIC_ID. */
104 l[4] = (val & 0xF0FFFF) | (VT8237R_APIC_ID << 24);
106 for (i = 0; i < ARRAY_SIZE(ioapic_table); i++) {
107 l[0] = (ioapic_table[i].reg * 2) + 0x10;
108 l[4] = ioapic_table[i].value_low;
110 l[0] = (ioapic_table[i].reg * 2) + 0x11;
111 l[4] = ioapic_table[i].value_high;
114 if ((i == 0) && (value_low == 0xffffffff)) {
115 printk_warning("IO APIC not responding.\n");
121 static void southbridge_init_common(struct device *dev);
123 /** Set up PCI IRQ routing, route everything through APIC. */
124 static void pci_routing_fixup(struct device *dev)
126 /* PCI PNP Interrupt Routing INTE/F - disable */
127 pci_write_config8(dev, 0x44, 0x00);
129 /* PCI PNP Interrupt Routing INTG/H - disable */
130 pci_write_config8(dev, 0x45, 0x00);
132 /* Route INTE-INTH through registers above, no map to INTA-INTD. */
133 pci_write_config8(dev, 0x46, 0x10);
135 /* PCI Interrupt Polarity */
136 pci_write_config8(dev, 0x54, 0x00);
138 /* PCI INTA# Routing */
139 pci_write_config8(dev, 0x55, 0x00);
141 /* PCI INTB#/C# Routing */
142 pci_write_config8(dev, 0x56, 0x00);
144 /* PCI INTD# Routing */
145 pci_write_config8(dev, 0x57, 0x00);
149 * Set up the power management capabilities directly into ACPI mode.
150 * This avoids having to handle any System Management Interrupts (SMIs).
153 extern u8 acpi_slp_type;
156 static void setup_pm(device_t dev)
159 /* Debounce LID and PWRBTN# Inputs for 16ms. */
160 pci_write_config8(dev, 0x80, 0x20);
162 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
163 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
165 /* Set ACPI to 9, must set IRQ 9 override to level! Set PSON gating. */
166 pci_write_config8(dev, 0x82, 0x40 | VT8237R_ACPI_IRQ);
168 /* Primary interupt channel, define wake events 0=IRQ0 15=IRQ15 1=en. */
169 pci_write_config16(dev, 0x84, 0x30b2);
171 /* SMI output level to low, 7.5us throttle clock */
172 pci_write_config8(dev, 0x8d, 0x18);
174 /* GP Timer Control 1s */
175 pci_write_config8(dev, 0x93, 0x88);
178 * 7 = SMBus clock from RTC 32.768KHz
179 * 5 = Internal PLL reset from susp disabled
182 pci_write_config8(dev, 0x94, 0xa0);
185 * 7 = stp to sust delay 1msec
186 * 6 = SUSST# Deasserted Before PWRGD for STD
187 * 4 = PWRGOOD reset on VT8237A/S
188 * 3 = GPO26/GPO27 is GPO
189 * 2 = Disable Alert on Lan
191 pci_write_config8(dev, 0x95, 0xcc);
193 /* Disable GP3 timer. */
194 pci_write_config8(dev, 0x98, 0);
196 /* Enable ACPI accessm RTC signal gated with PSON. */
197 pci_write_config8(dev, 0x81, 0x84);
199 /* Clear status events. */
200 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x00);
201 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x20);
202 outw(0xffff, VT8237R_ACPI_IO_BASE + 0x28);
203 outl(0xffffffff, VT8237R_ACPI_IO_BASE + 0x30);
205 /* Disable SCI on GPIO. */
206 outw(0x0, VT8237R_ACPI_IO_BASE + 0x22);
208 /* Disable SMI on GPIO. */
209 outw(0x0, VT8237R_ACPI_IO_BASE + 0x24);
211 /* Disable all global enable SMIs. */
212 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2a);
214 /* All SMI off, both IDE buses ON, PSON rising edge. */
215 outw(0x0, VT8237R_ACPI_IO_BASE + 0x2c);
217 /* Primary activity SMI disable. */
218 outl(0x0, VT8237R_ACPI_IO_BASE + 0x34);
220 /* GP timer reload on none. */
221 outl(0x0, VT8237R_ACPI_IO_BASE + 0x38);
223 /* Disable extended IO traps. */
224 outb(0x0, VT8237R_ACPI_IO_BASE + 0x42);
226 /* SCI is generated for RTC/pwrBtn/slpBtn. */
227 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
228 #if CONFIG_HAVE_ACPI_RESUME == 1
229 acpi_slp_type = ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
230 printk_debug("SLP_TYP type was %x %x\n", tmp, acpi_slp_type);
235 outw(tmp, VT8237R_ACPI_IO_BASE + 0x04);
242 static void vt8237r_init(struct device *dev)
246 printk_spew("Entering vt8237r_init.\n");
248 #ifdef CONFIG_EPIA_VT8237R_INIT
249 printk_spew("vt8237r_init SATA LED.\n");
251 * TODO: Looks like stock BIOS can do this but causes a hang
252 * Enable SATA LED, disable special CPU Frequency Change -
253 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
254 * Setup to match EPIA default
257 enables = pci_read_config8(dev, 0xe5);
259 pci_write_config8(dev, 0xe5, enables);
261 printk_spew("vt8237r_init PCI Req.\n");
263 * Enable Flash Write Access.
264 * Note EPIA-N Does not use REQ5 or PCISTP#(Hang)
266 enables = pci_read_config8(dev, 0xe4);
268 pci_write_config8(dev, 0xe4, enables);
272 * Enable SATA LED, disable special CPU Frequency Change -
273 * GPIO28 GPIO22 GPIO29 GPIO23 are GPIOs.
275 pci_write_config8(dev, 0xe5, 0x09);
277 /* REQ5 as PCI request input - should be together with INTE-INTH. */
278 pci_write_config8(dev, 0xe4, 0x4);
282 printk_spew("vt8237r_init CPU Rst.\n");
283 /* Set bit 3 of 0x4f (use INIT# as CPU reset). */
284 enables = pci_read_config8(dev, 0x4f);
286 pci_write_config8(dev, 0x4f, enables);
288 printk_spew("vt8237r_init Read Pass Write Ctrl.\n");
290 * Set Read Pass Write Control Enable
291 * (force A2 from APIC FSB to low).
293 pci_write_config8(dev, 0x48, 0x8c);
295 printk_spew("vt8237r_init calling southbridge_init_common.\n");
296 southbridge_init_common(dev);
298 /* FIXME: Intel needs more bit set for C2/C3. */
301 * Allow SLP# signal to assert LDTSTOP_L.
302 * Will work for C3 and for FID/VID change.
304 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
306 printk_spew("Leaving vt8237r_init.\n");
309 static void vt8237s_init(struct device *dev)
313 /* Put SPI base VT8237S_SPI_MEM_BASE. */
314 tmp = pci_read_config32(dev, 0xbc);
315 pci_write_config32(dev, 0xbc,
316 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
319 * REQ5 as PCI request input - should be together with INTE-INTH.
321 pci_write_config8(dev, 0xe4, 0x04);
323 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
324 pci_write_config8(dev, 0xec, 0x4);
326 /* Host Bus Power Management Control, maybe not needed */
327 pci_write_config8(dev, 0x8c, 0x5);
329 /* Enable HPET at VT8237R_HPET_ADDR., does not work correctly on R. */
330 pci_write_config32(dev, 0x68, (VT8237R_HPET_ADDR | 0x80));
332 southbridge_init_common(dev);
334 /* FIXME: Intel needs more bit set for C2/C3. */
337 * Allow SLP# signal to assert LDTSTOP_L.
338 * Will work for C3 and for FID/VID change. FIXME FIXME, pre rev A2.
340 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
345 static void vt8237_common_init(struct device *dev)
349 /* Enable addr/data stepping. */
350 byte = pci_read_config8(dev, PCI_COMMAND);
351 byte |= PCI_COMMAND_WAIT;
352 pci_write_config8(dev, PCI_COMMAND, byte);
354 /* Enable the internal I/O decode. */
355 enables = pci_read_config8(dev, 0x6C);
357 pci_write_config8(dev, 0x6C, enables);
362 * 7 000E0000h-000EFFFFh
363 * 6 FFF00000h-FFF7FFFFh
364 * 5 FFE80000h-FFEFFFFFh
365 * 4 FFE00000h-FFE7FFFFh
366 * 3 FFD80000h-FFDFFFFFh
367 * 2 FFD00000h-FFD7FFFFh
368 * 1 FFC80000h-FFCFFFFFh
369 * 0 FFC00000h-FFC7FFFFh
370 * So 0x7f here sets ROM decode to FFC00000-FFFFFFFF or 4Mbyte.
372 pci_write_config8(dev, 0x41, 0x7f);
375 * Set bit 6 of 0x40 (I/O recovery time).
376 * IMPORTANT FIX - EISA = ECLR reg at 0x4d0! Decoding must be on so
377 * that PCI interrupts can be properly marked as level triggered.
379 enables = pci_read_config8(dev, 0x40);
381 pci_write_config8(dev, 0x40, enables);
383 /* Line buffer control */
384 enables = pci_read_config8(dev, 0x42);
386 pci_write_config8(dev, 0x42, enables);
388 /* Delay transaction control */
389 pci_write_config8(dev, 0x43, 0xb);
391 /* I/O recovery time, default IDE routing */
392 pci_write_config8(dev, 0x4c, 0x44);
394 /* ROM memory cycles go to LPC. */
395 pci_write_config8(dev, 0x59, 0x80);
400 * 3 | Bypass APIC De-Assert Message (1=Enable)
401 * 1 | possibly "INTE#, INTF#, INTG#, INTH# as PCI"
402 * | bit 1=1 works for Aaron at VIA, bit 1=0 works for jakllsch
403 * 0 | Dynamic Clock Gating Main Switch (1=Enable)
405 pci_write_config8(dev, 0x5b, 0xb);
407 /* Set 0x58 to 0x43 APIC and RTC. */
408 pci_write_config8(dev, 0x58, 0x43);
410 /* Enable serial IRQ, 6PCI clocks. */
411 pci_write_config8(dev, 0x52, 0x9);
413 /* Power management setup */
420 static void vt8237r_read_resources(device_t dev)
422 struct resource *res;
424 pci_dev_read_resources(dev);
425 /* Fixed APIC resource */
426 res = new_resource(dev, 0x44);
427 res->base = VT8237R_APIC_BASE;
429 res->limit = res->base + res->size - 1;
432 res->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
433 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
437 * The VT8237R is not a PCI bridge and has no resources of its own (other
438 * than standard PC I/O addresses), however it does control the ISA bus
439 * and so we need to manually call enable childrens resources on that bus.
441 static void vt8237r_enable_resources(device_t dev)
443 pci_dev_enable_resources(dev);
444 enable_childrens_resources(dev);
447 static void init_keyboard(struct device *dev)
449 u8 regval = pci_read_config8(dev, 0x51);
451 init_pc_keyboard(0x60, 0x64, 0);
454 static void southbridge_init_common(struct device *dev)
456 vt8237_common_init(dev);
457 pci_routing_fixup(dev);
458 setup_ioapic(VT8237R_APIC_BASE);
463 static const struct device_operations vt8237r_lpc_ops_s = {
464 .read_resources = vt8237r_read_resources,
465 .set_resources = pci_dev_set_resources,
466 .enable_resources = vt8237r_enable_resources,
467 .init = &vt8237s_init,
468 .scan_bus = scan_static_bus,
471 static const struct device_operations vt8237r_lpc_ops_r = {
472 .read_resources = vt8237r_read_resources,
473 .set_resources = pci_dev_set_resources,
474 .enable_resources = vt8237r_enable_resources,
475 .init = &vt8237r_init,
476 .scan_bus = scan_static_bus,
479 static const struct pci_driver lpc_driver_r __pci_driver = {
480 .ops = &vt8237r_lpc_ops_r,
481 .vendor = PCI_VENDOR_ID_VIA,
482 .device = PCI_DEVICE_ID_VIA_VT8237R_LPC,
485 static const struct pci_driver lpc_driver_s __pci_driver = {
486 .ops = &vt8237r_lpc_ops_s,
487 .vendor = PCI_VENDOR_ID_VIA,
488 .device = PCI_DEVICE_ID_VIA_VT8237S_LPC,