2 * This file is part of the coreboot project.
4 * Copyright (C) 2008 Advanced Micro Devices, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
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
23 #include "sb600_smbus.c"
25 #define SMBUS_IO_BASE 0x1000 /* Is it a temporary SMBus I/O base address? */
28 static void pmio_write(u8 reg, u8 value)
31 outb(value, PM_INDEX + 1);
34 static u8 pmio_read(u8 reg)
37 return inb(PM_INDEX + 1);
40 /* RPR 2.1: Get SB ASIC Revision. */
41 static u8 get_sb600_revision(void)
44 dev = pci_locate_device(PCI_ID(0x1002, 0x4385), 0);
46 if (dev == PCI_DEV_INVALID) {
47 die("SMBUS controller not found\n");
50 return pci_read_config8(dev, 0x08);
54 /***************************************
55 * Legacy devices are mapped to LPC space.
58 * ACPI Micro-controller port
59 * This function does not change port 0x80 decoding.
60 * Console output through any port besides 0x3f8 is unsupported.
61 * If you use FWH ROMs, you have to setup IDSEL.
62 * Reviewed-by: Carl-Daniel Hailfinger
63 * Reviewed against AMD SB600 Register Reference Manual rev. 3.03, section 3.1
65 ***************************************/
66 static void sb600_lpc_init(void)
72 dev = pci_locate_device(PCI_ID(0x1002, 0x4385), 0); /* SMBUS controller */
73 /* NOTE: Set BootTimerDisable, otherwise it would keep rebooting!!
74 * This bit has no meaning if debug strap is not enabled. So if the
75 * board keeps rebooting and the code fails to reach here, we could
76 * disable the debug strap first. */
77 reg32 = pci_read_config32(dev, 0x4C);
79 pci_write_config32(dev, 0x4C, reg32);
81 /* Enable lpc controller */
82 reg32 = pci_read_config32(dev, 0x64);
84 pci_write_config32(dev, 0x64, reg32);
86 dev = pci_locate_device(PCI_ID(0x1002, 0x438d), 0); /* LPC Controller */
87 /* Decode port 0x3f8-0x3ff (Serial 0) */
88 // XXX Serial port decode on LPC is hardcoded to 0x3f8
89 reg8 = pci_read_config8(dev, 0x44);
91 pci_write_config8(dev, 0x44, reg8);
93 /* Decode port 0x60 & 0x64 (PS/2 keyboard) and port 0x62 & 0x66 (ACPI)*/
94 reg8 = pci_read_config8(dev, 0x47);
95 reg8 |= (1 << 5) | (1 << 6);
96 pci_write_config8(dev, 0x47, reg8);
99 reg8 = pci_read_config8(dev, 0x48);
100 /* Decode ports 0x2e-0x2f, 0x4e-0x4f (SuperI/O configuration) */
101 reg8 |= (1 << 1) | (1 << 0);
102 /* Decode port 0x70-0x73 (RTC) */
104 pci_write_config8(dev, 0x48, reg8);
107 /* what is its usage? */
108 static u32 get_sbdn(u32 bus)
112 /* Find the device. */
113 dev = pci_locate_device_on_bus(PCI_ID(0x1002, 0x4385), bus);
114 return (dev >> 15) & 0x1f;
117 static u8 dual_core(void)
119 return (pci_read_config32(PCI_DEV(0, 0x18, 3), 0xE8) & (0x3<<12)) != 0;
123 * SB600 VFSMAF (VID/FID System Management Action Field) is 010b by default.
124 * RPR 2.3.3 C-state and VID/FID change for the K8 platform.
126 static void enable_fid_change_on_sb(u32 sbbusn, u32 sbdn)
129 byte = pmio_read(0x9a);
135 pmio_write(0x9a, byte);
137 byte = pmio_read(0x8f);
140 pmio_write(0x8f, byte);
142 pmio_write(0x8b, 0x01);
143 pmio_write(0x8a, 0x90);
145 if(get_sb600_revision() > 0x13)
146 pmio_write(0x88, 0x10);
148 pmio_write(0x88, 0x06);
150 byte = pmio_read(0x7c);
153 pmio_write(0x7c, byte);
155 /* Must be 0 for K8 platform. */
156 byte = pmio_read(0x68);
158 pmio_write(0x68, byte);
159 /* Must be 0 for K8 platform. */
160 byte = pmio_read(0x8d);
162 pmio_write(0x8d, byte);
164 byte = pmio_read(0x61);
166 pmio_write(0x61, byte);
168 byte = pmio_read(0x42);
170 pmio_write(0x42, byte);
172 if (get_sb600_revision() == 0x14) {
173 pmio_write(0x89, 0x10);
175 byte = pmio_read(0x52);
177 pmio_write(0x52, byte);
181 void hard_reset(void)
190 void soft_reset(void)
197 void sb600_pci_port80(void)
203 dev = pci_locate_device(PCI_ID(0x1002, 0x4384), 0);
205 /* Chip Control: Enable subtractive decoding */
206 byte = pci_read_config8(dev, 0x40);
208 pci_write_config8(dev, 0x40, byte);
210 /* Misc Control: Enable subtractive decoding if 0x40 bit 5 is set */
211 byte = pci_read_config8(dev, 0x4B);
213 pci_write_config8(dev, 0x4B, byte);
215 /* The same IO Base and IO Limit here is meaningful because we set the
216 * bridge to be subtractive. During early setup stage, we have to make
217 * sure that data can go through port 0x80.
219 /* IO Base: 0xf000 */
220 byte = pci_read_config8(dev, 0x1C);
222 pci_write_config8(dev, 0x1C, byte);
224 /* IO Limit: 0xf000 */
225 byte = pci_read_config8(dev, 0x1D);
227 pci_write_config8(dev, 0x1D, byte);
229 /* PCI Command: Enable IO response */
230 byte = pci_read_config8(dev, 0x04);
232 pci_write_config8(dev, 0x04, byte);
235 dev = pci_locate_device(PCI_ID(0x1002, 0x438D), 0);
237 byte = pci_read_config8(dev, 0x4A);
238 byte &= ~(1 << 5); /* disable lpc port 80 */
239 pci_write_config8(dev, 0x4A, byte);
242 void sb600_lpc_port80(void)
248 /* Enable LPC controller */
249 dev = pci_locate_device(PCI_ID(0x1002, 0x4385), 0);
250 reg32 = pci_read_config32(dev, 0x64);
251 reg32 |= 0x00100000; /* lpcEnable */
252 pci_write_config32(dev, 0x64, reg32);
254 /* Enable port 80 LPC decode in pci function 3 configuration space. */
255 dev = pci_locate_device(PCI_ID(0x1002, 0x438d), 0);
256 byte = pci_read_config8(dev, 0x4a);
257 byte |= 1 << 5; /* enable port 80 */
258 pci_write_config8(dev, 0x4a, byte);
261 /* sbDevicesPorInitTable */
262 static void sb600_devices_por_init(void)
267 printk(BIOS_INFO, "sb600_devices_por_init()\n");
268 /* SMBus Device, BDF:0-20-0 */
269 printk(BIOS_INFO, "sb600_devices_por_init(): SMBus Device, BDF:0-20-0\n");
270 dev = pci_locate_device(PCI_ID(0x1002, 0x4385), 0);
272 if (dev == PCI_DEV_INVALID) {
273 die("SMBUS controller not found\n");
276 printk(BIOS_INFO, "SMBus controller enabled, sb revision is 0x%x\n",
277 get_sb600_revision());
279 /* sbPorAtStartOfTblCfg */
280 /* Set A-Link bridge access address. This address is set at device 14h, function 0, register 0xf0.
281 * This is an I/O address. The I/O address must be on 16-byte boundry. */
282 pci_write_config32(dev, 0xf0, AB_INDX);
284 /* To enable AB/BIF DMA access, a specific register inside the BIF register space needs to be configured first. */
285 /*Enables the SB600 to send transactions upstream over A-Link Express interface. */
286 axcfg_reg(0x04, 1 << 2, 1 << 2);
287 axindxc_reg(0x21, 0xff, 0);
289 /* 2.3.5:Enabling Non-Posted Memory Write for the K8 Platform */
290 axindxc_reg(0x10, 1 << 9, 1 << 9);
291 /* END of sbPorAtStartOfTblCfg */
293 /* sbDevicesPorInitTables */
294 /* set smbus iobase */
295 pci_write_config32(dev, 0x10, SMBUS_IO_BASE | 1);
297 /* enable smbus controller interface */
298 byte = pci_read_config8(dev, 0xd2);
300 pci_write_config8(dev, 0xd2, byte);
302 /* set smbus 1, ASF 2.0 (Alert Standard Format), iobase */
303 pci_write_config16(dev, 0x58, SMBUS_IO_BASE | 0x11);
305 /* TODO: I don't know the useage of followed two lines. I copied them from CIM. */
306 pci_write_config8(dev, 0x0a, 0x1);
307 pci_write_config8(dev, 0x0b, 0x6);
310 pci_write_config8(dev, 0x40, 0xd4);
312 /* Enable ISA Address 0-960K decoding */
313 pci_write_config8(dev, 0x48, 0x0f);
315 /* Enable ISA Address 0xC0000-0xDFFFF decode */
316 pci_write_config8(dev, 0x49, 0xff);
318 /* Enable decode cycles to IO C50, C51, C52 GPM controls. */
319 byte = pci_read_config8(dev, 0x41);
322 pci_write_config8(dev, 0x41, byte);
324 /* Legacy DMA Prefetch Enhancement, CIM masked it. */
325 /* pci_write_config8(dev, 0x43, 0x1); */
327 /* Disabling Legacy USB Fast SMI# */
328 byte = pci_read_config8(dev, 0x62);
330 pci_write_config8(dev, 0x62, byte);
332 /* Features Enable */
333 pci_write_config32(dev, 0x64, 0x829E7DBF); /* bit10: Enables the HPET interrupt. */
335 /* SerialIrq Control */
336 pci_write_config8(dev, 0x69, 0x90);
338 /* Test Mode, PCIB_SReset_En Mask is set. */
339 pci_write_config8(dev, 0x6c, 0x20);
341 /* IO Address Enable, CIM set 0x78 only and masked 0x79. */
342 /*pci_write_config8(dev, 0x79, 0x4F); */
343 pci_write_config8(dev, 0x78, 0xFF);
345 /* This register is not used on sb600. It came from older chipset. */
346 /*pci_write_config8(dev, 0x95, 0xFF); */
348 /* Set smbus iospace enable, I don't know why write 0x04 into reg5 that is reserved */
349 pci_write_config16(dev, 0x4, 0x0407);
351 /* clear any lingering errors, so the transaction will run */
352 outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT);
354 /* IDE Device, BDF:0-20-1 */
355 printk(BIOS_INFO, "sb600_devices_por_init(): IDE Device, BDF:0-20-1\n");
356 dev = pci_locate_device(PCI_ID(0x1002, 0x438C), 0);
357 /* Disable prefetch */
358 byte = pci_read_config8(dev, 0x63);
360 pci_write_config8(dev, 0x63, byte);
362 /* LPC Device, BDF:0-20-3 */
363 printk(BIOS_INFO, "sb600_devices_por_init(): LPC Device, BDF:0-20-3\n");
364 dev = pci_locate_device(PCI_ID(0x1002, 0x438D), 0);
366 pci_write_config8(dev, 0x40, 0x04);
368 /* IO Port Decode Enable */
369 pci_write_config8(dev, 0x44, 0xFF);
370 pci_write_config8(dev, 0x45, 0xFF);
371 pci_write_config8(dev, 0x46, 0xC3);
372 pci_write_config8(dev, 0x47, 0xFF);
374 // TODO: This has already been done(?)
375 /* IO/Mem Port Decode Enable, I don't know why CIM disable some ports.
376 * Disable LPC TimeOut counter, enable SuperIO Configuration Port (2e/2f),
377 * Alternate SuperIO Configuration Port (4e/4f), Wide Generic IO Port (64/65). */
378 byte = pci_read_config8(dev, 0x48);
379 byte |= (1 << 1) | (1 << 0); /* enable Super IO config port 2e-2h, 4e-4f */
380 byte |= 1 << 6; /* enable for RTC I/O range */
381 pci_write_config8(dev, 0x48, byte);
382 pci_write_config8(dev, 0x49, 0xFF);
383 /* Enable 0x480-0x4bf, 0x4700-0x470B */
384 byte = pci_read_config8(dev, 0x4A);
385 byte |= ((1 << 1) + (1 << 6)); /*0x42, save the configuraion for port 0x80. */
386 pci_write_config8(dev, 0x4A, byte);
388 /* Enable Tpm12_en and Tpm_legacy. I don't know what is its usage and copied from CIM. */
389 pci_write_config8(dev, 0x7C, 0x05);
391 /* P2P Bridge, BDF:0-20-4, the configuration of the registers in this dev are copied from CIM,
392 * TODO: I don't know what are their mean? */
393 printk(BIOS_INFO, "sb600_devices_por_init(): P2P Bridge, BDF:0-20-4\n");
394 dev = pci_locate_device(PCI_ID(0x1002, 0x4384), 0);
395 /* I don't know why CIM tried to write into a read-only reg! */
396 /*pci_write_config8(dev, 0x0c, 0x20) */ ;
398 /* Arbiter enable. */
399 pci_write_config8(dev, 0x43, 0xff);
401 /* Set PCDMA request into hight priority list. */
402 /* pci_write_config8(dev, 0x49, 0x1) */ ;
404 pci_write_config8(dev, 0x40, 0x26);
406 /* I don't know why CIM set reg0x1c as 0x11.
407 * System will block at sdram_initialize() if I set it before call sdram_initialize().
408 * If it is necessary to set reg0x1c as 0x11, please call this function after sdram_initialize().
409 * pci_write_config8(dev, 0x1c, 0x11);
410 * pci_write_config8(dev, 0x1d, 0x11);*/
412 /*CIM set this register; but I didn't find its description in RPR.
413 On DBM690T platform, I didn't find different between set and skip this register.
414 But on Filbert platform, the DEBUG message from serial port on Peanut board can't be displayed
415 after the bit0 of this register is set.
416 pci_write_config8(dev, 0x04, 0x21);
418 pci_write_config8(dev, 0x0d, 0x40);
419 pci_write_config8(dev, 0x1b, 0x40);
420 /* Enable PCIB_DUAL_EN_UP will fix potential problem with PCI cards. */
421 pci_write_config8(dev, 0x50, 0x01);
423 /* SATA Device, BDF:0-18-0, Non-Raid-5 SATA controller */
424 printk(BIOS_INFO, "sb600_devices_por_init(): SATA Device, BDF:0-18-0\n");
425 dev = pci_locate_device(PCI_ID(0x1002, 0x4380), 0);
427 /*PHY Global Control, we are using A14.
428 * default: 0x2c40 for ASIC revision A12 and below
429 * 0x2c00 for ASIC revision A13 and above.*/
430 pci_write_config16(dev, 0x86, 0x2C00);
432 /* PHY Port0-3 Control */
433 pci_write_config32(dev, 0x88, 0xB400DA);
434 pci_write_config32(dev, 0x8c, 0xB400DA);
435 pci_write_config32(dev, 0x90, 0xB400DA);
436 pci_write_config32(dev, 0x94, 0xB400DA);
438 /* Port0-3 BIST Control/Status */
439 pci_write_config8(dev, 0xa5, 0xB8);
440 pci_write_config8(dev, 0xad, 0xB8);
441 pci_write_config8(dev, 0xb5, 0xB8);
442 pci_write_config8(dev, 0xbd, 0xB8);
445 /* sbPmioPorInitTable, Pre-initializing PMIO register space
446 * The power management (PM) block is resident in the PCI/LPC/ISA bridge.
447 * The PM regs are accessed via IO mapped regs 0xcd6 and 0xcd7.
448 * The index address is first programmed into IO reg 0xcd6.
449 * Read or write values are accessed through IO reg 0xcd7.
451 static void sb600_pmio_por_init(void)
455 printk(BIOS_INFO, "sb600_pmio_por_init()\n");
456 /* K8KbRstEn, KB_RST# control for K8 system. */
457 byte = pmio_read(0x66);
459 pmio_write(0x66, byte);
461 /* RPR2.3.4 S3/S4/S5 Function for the K8 Platform. */
462 byte = pmio_read(0x52);
465 pmio_write(0x52, byte);
467 /* C state enable and SLP enable in C states. */
468 byte = pmio_read(0x67);
470 pmio_write(0x67, byte);
472 /* CIM sets 0x0e, but bit2 is for P4 system. */
473 byte = pmio_read(0x68);
476 pmio_write(0x68, byte);
478 /* Watch Dog Timer Control
479 * Set watchdog time base to 0xfec000f0 to avoid SCSI card boot failure.
480 * But I don't find WDT is enabled in SMBUS 0x41 bit3 in CIM.
482 pmio_write(0x6c, 0xf0);
483 pmio_write(0x6d, 0x00);
484 pmio_write(0x6e, 0xc0);
485 pmio_write(0x6f, 0xfe);
487 /* rpr2.14: Enables HPET periodical mode */
488 byte = pmio_read(0x9a);
490 pmio_write(0x9a, byte);
491 byte = pmio_read(0x9f);
493 pmio_write(0x9f, byte);
494 byte = pmio_read(0x9e);
495 byte |= (1 << 6) | (1 << 7);
496 pmio_write(0x9e, byte);
498 /* rpr2.14: Hides SM bus controller Bar1 where stores HPET MMIO base address */
499 /* We have to clear this bit here, otherwise the kernel hangs. */
500 byte = pmio_read(0x55);
503 pmio_write(0x55, byte);
505 /* rpr2.14: Make HPET MMIO decoding controlled by the memory enable bit in command register of LPC ISA bridage */
506 byte = pmio_read(0x52);
508 pmio_write(0x52, byte);
510 /* rpr2.22: PLL Reset */
511 byte = pmio_read(0x86);
513 pmio_write(0x86, byte);
516 /* This provides 16us delay before the assertion of LDTSTP# when C3 is entered.
517 * The delay will allow USB DMA to go on in a continuous manner
519 pmio_write(0x89, 0x10);
520 /* Set this bit to allow pop-up request being latched during the minimum LDTSTP# assertion time */
521 byte = pmio_read(0x52);
523 pmio_write(0x52, byte);
525 /* rpr2.15: ASF Remote Control Action */
526 byte = pmio_read(0x9f);
528 pmio_write(0x9f, byte);
530 /* rpr2.19: Enabling Spread Spectrum */
531 byte = pmio_read(0x42);
533 pmio_write(0x42, byte);
537 * Compliant with CIM_48's sbPciCfg.
538 * Add any south bridge setting.
540 static void sb600_pci_cfg(void)
545 /* SMBus Device, BDF:0-20-0 */
546 dev = pci_locate_device(PCI_ID(0x1002, 0x4385), 0);
547 /* Eable the hidden revision ID, available after A13. */
548 byte = pci_read_config8(dev, 0x70);
550 pci_write_config8(dev, 0x70, byte);
551 /* rpr2.20 Disable Timer IRQ Enhancement for proper operation of the 8254 timer, 0xae[5]. */
552 byte = pci_read_config8(dev, 0xae);
554 pci_write_config8(dev, 0xae, byte);
556 /* Enable watchdog decode timer */
557 byte = pci_read_config8(dev, 0x41);
559 pci_write_config8(dev, 0x41, byte);
561 /* Set to 1 to reset USB on the software (such as IO-64 or IO-CF9 cycles)
562 * generated PCIRST#. */
563 byte = pmio_read(0x65);
565 pmio_write(0x65, byte);
566 /*For A13 and above. */
567 if (get_sb600_revision() > 0x12) {
568 /* rpr2.16 C-State Reset, PMIO 0x9f[7]. */
569 byte = pmio_read(0x9f);
571 pmio_write(0x9f, byte);
572 /* rpr2.17 PCI Clock Period will increase to 30.8ns. 0x53[7]. */
573 byte = pmio_read(0x53);
575 pmio_write(0x53, byte);
578 /* IDE Device, BDF:0-20-1 */
579 dev = pci_locate_device(PCI_ID(0x1002, 0x438C), 0);
580 /* Enable IDE Explicit prefetch, 0x63[0] clear */
581 byte = pci_read_config8(dev, 0x63);
583 pci_write_config8(dev, 0x63, byte);
585 /* LPC Device, BDF:0-20-3 */
586 dev = pci_locate_device(PCI_ID(0x1002, 0x438D), 0);
587 /* rpr7.2 Enabling LPC DMA function. */
588 byte = pci_read_config8(dev, 0x40);
590 pci_write_config8(dev, 0x40, byte);
591 /* rpr7.3 Disabling LPC TimeOut. 0x48[7] clear. */
592 byte = pci_read_config8(dev, 0x48);
594 pci_write_config8(dev, 0x48, byte);
595 /* rpr7.5 Disabling LPC MSI Capability, 0x78[1] clear. */
596 byte = pci_read_config8(dev, 0x78);
598 pci_write_config8(dev, 0x78, byte);
600 /* SATA Device, BDF:0-18-0, Non-Raid-5 SATA controller */
601 dev = pci_locate_device(PCI_ID(0x1002, 0x4380), 0);
602 /* rpr6.8 Disabling SATA MSI Capability, for A13 and above, 0x42[7]. */
603 if (0x12 < get_sb600_revision()) {
605 reg32 = pci_read_config32(dev, 0x40);
607 pci_write_config32(dev, 0x40, reg32);
610 /* EHCI Device, BDF:0-19-5, ehci usb controller */
611 dev = pci_locate_device(PCI_ID(0x1002, 0x4386), 0);
612 /* rpr5.10 Disabling USB EHCI MSI Capability. 0x50[6]. */
613 byte = pci_read_config8(dev, 0x50);
615 pci_write_config8(dev, 0x50, byte);
617 /* OHCI0 Device, BDF:0-19-0, ohci usb controller #0 */
618 dev = pci_locate_device(PCI_ID(0x1002, 0x4387), 0);
619 /* rpr5.11 Disabling USB OHCI MSI Capability. 0x40[12:8]=0x1f. */
620 byte = pci_read_config8(dev, 0x41);
622 pci_write_config8(dev, 0x41, byte);
627 * Compliant with CIM_48's ATSBPowerOnResetInitJSP
629 static void sb600_por_init(void)
631 /* sbDevicesPorInitTable + sbK8PorInitTable */
632 sb600_devices_por_init();
634 /* sbPmioPorInitTable + sbK8PmioPorInitTable */
635 sb600_pmio_por_init();
639 * Compliant with CIM_48's AtiSbBeforePciInit
640 * It should be called during early POST after memory detection and BIOS shadowing but before PCI bus enumeration.
642 static void sb600_before_pci_init(void)
648 * This function should be called after enable_sb600_smbus().
650 static void sb600_early_setup(void)
652 printk(BIOS_INFO, "sb600_early_setup()\n");
656 static int smbus_read_byte(u32 device, u32 address)
658 return do_smbus_read_byte(SMBUS_IO_BASE, device, address);