2 * This file is part of the coreboot project.
4 * Copyright (C) 2007 Corey Osgood <corey_osgood@verizon.net>
5 * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
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; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #include <device/pci_ids.h>
28 * Print an error, should it occur. If no error, just exit.
30 * @param host_status The data returned on the host status register after
31 * a transaction is processed.
32 * @param loops The number of times a transaction was attempted.
34 static void smbus_print_error(u8 host_status, int loops)
36 /* Check if there actually was an error. */
37 if ((host_status == 0x00 || host_status == 0x40 ||
38 host_status == 0x42) && (loops < SMBUS_TIMEOUT))
41 if (loops >= SMBUS_TIMEOUT)
42 print_err("SMBus timeout\n");
43 if (host_status & (1 << 4))
44 print_err("Interrupt/SMI# was Failed Bus Transaction\n");
45 if (host_status & (1 << 3))
46 print_err("Bus error\n");
47 if (host_status & (1 << 2))
48 print_err("Device error\n");
49 if (host_status & (1 << 1))
50 print_debug("Interrupt/SMI# completed successfully\n");
51 if (host_status & (1 << 0))
52 print_err("Host busy\n");
56 * Wait for the SMBus to become ready to process the next transaction.
58 static void smbus_wait_until_ready(void)
62 PRINT_DEBUG("Waiting until SMBus ready\n");
64 /* Yes, this is a mess, but it's the easiest way to do it. */
65 /* XXX not so messy, but an explanation of the hack would have been better */
67 while ((inb(SMBHSTSTAT) & 1) == 1 && loops < SMBUS_TIMEOUT)
70 smbus_print_error(inb(SMBHSTSTAT), loops);
74 * Reset and take ownership of the SMBus.
76 static void smbus_reset(void)
78 outb(HOST_RESET, SMBHSTSTAT);
80 /* Datasheet says we have to read it to take ownership of SMBus. */
83 PRINT_DEBUG("After reset status: ");
84 PRINT_DEBUG_HEX16(inb(SMBHSTSTAT));
89 * Read a byte from the SMBus.
91 * @param dimm The address location of the DIMM on the SMBus.
92 * @param offset The offset the data is located at.
94 u8 smbus_read_byte(u8 dimm, u8 offset)
99 PRINT_DEBUG_HEX16(dimm);
100 PRINT_DEBUG(" OFFSET ");
101 PRINT_DEBUG_HEX16(offset);
106 /* Clear host data port. */
107 outb(0x00, SMBHSTDAT0);
109 smbus_wait_until_ready();
111 /* Actual addr to reg format. */
114 outb(dimm, SMBXMITADD);
115 outb(offset, SMBHSTCMD);
117 /* Start transaction, byte data read. */
118 outb(0x48, SMBHSTCTL);
120 smbus_wait_until_ready();
122 val = inb(SMBHSTDAT0);
123 PRINT_DEBUG("Read: ");
124 PRINT_DEBUG_HEX16(val);
127 /* Probably don't have to do this, but it can't hurt. */
134 * Enable the SMBus on VT8237R-based systems.
136 void enable_smbus(void)
140 /* Power management controller */
141 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
142 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
143 if (dev == PCI_DEV_INVALID) {
144 /* Power management controller */
145 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
146 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
147 if (dev == PCI_DEV_INVALID)
148 die("Power management controller not found\n");
152 * 7 = SMBus Clock from RTC 32.768KHz
153 * 5 = Internal PLL reset from susp
155 pci_write_config8(dev, VT8237R_POWER_WELL, 0xa0);
158 pci_write_config16(dev, VT8237R_SMBUS_IO_BASE_REG,
159 VT8237R_SMBUS_IO_BASE | 0x1);
161 /* SMBus Host Configuration, enable. */
162 pci_write_config8(dev, VT8237R_SMBUS_HOST_CONF, 0x01);
164 /* Make it work for I/O. */
165 pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
169 /* Reset the internal pointer. */
174 * A fixup for some systems that need time for the SMBus to "warm up". This is
175 * needed on some VT823x based systems, where the SMBus spurts out bad data for
176 * a short time after power on. This has been seen on the VIA Epia series and
177 * Jetway J7F2-series. It reads the ID byte from SMBus, looking for
178 * known-good data from a slot/address. Exits on either good data or a timeout.
180 * TODO: This should probably go into some global file, but one would need to
181 * be created just for it. If some other chip needs/wants it, we can
182 * worry about it then.
184 * @param ctrl The memory controller and SMBus addresses.
186 void smbus_fixup(const struct mem_controller *ctrl)
188 int i, ram_slots, current_slot = 0;
191 ram_slots = ARRAY_SIZE(ctrl->channel0);
193 print_err("smbus_fixup() thinks there are no RAM slots!\n");
197 PRINT_DEBUG("Waiting for SMBus to warm up");
200 * Bad SPD data should be either 0 or 0xff, but YMMV. So we look for
201 * the ID bytes of SDRAM, DDR, DDR2, and DDR3 (and anything in between).
202 * VT8237R has only been seen on DDR and DDR2 based systems, so far.
204 for (i = 0; (i < SMBUS_TIMEOUT && ((result < SPD_MEMORY_TYPE_SDRAM) ||
205 (result > SPD_MEMORY_TYPE_SDRAM_DDR3))); i++) {
207 if (current_slot > ram_slots)
210 result = smbus_read_byte(ctrl->channel0[current_slot],
216 if (i >= SMBUS_TIMEOUT)
217 print_err("SMBus timed out while warming up\n");
219 PRINT_DEBUG("Done\n");
222 /* FIXME: Better separate the NB and SB, will be done once it works. */
224 void vt8237_sb_enable_fid_vid(void)
226 device_t dev, devctl;
228 /* Power management controller */
229 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
230 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
231 if (dev == PCI_DEV_INVALID) {
232 /* Power management controller */
233 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
234 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
235 if (dev == PCI_DEV_INVALID)
238 devctl = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
239 PCI_DEVICE_ID_VIA_VT8237_VLINK), 0);
241 if (devctl == PCI_DEV_INVALID)
244 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
245 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
247 /* Enable ACPI accessm RTC signal gated with PSON. */
248 pci_write_config8(dev, 0x81, 0x84);
251 * Allow SLP# signal to assert LDTSTOP_L.
252 * Will work for C3 and for FID/VID change.
255 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
257 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
258 pci_write_config8(dev, 0xec, 0x4);
260 /* So the chip knows we are on AMD. */
261 pci_write_config8(devctl, 0x7c, 0x7f);
266 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
267 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
269 /* Enable ACPI accessm RTC signal gated with PSON. */
270 pci_write_config8(dev, 0x81, 0x84);
273 * Allow SLP# signal to assert LDTSTOP_L.
274 * Will work for C3 and for FID/VID change.
276 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
279 void enable_rom_decode(void)
283 /* Power management controller */
284 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
285 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
286 if (dev == PCI_DEV_INVALID) {
287 /* Power management controller */
288 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
289 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
290 if (dev == PCI_DEV_INVALID)
294 /* ROM decode last 1MB FFC00000 - FFFFFFFF. */
295 pci_write_config8(dev, 0x41, 0x7f);
298 #ifdef CONFIG_NORTHBRIDGE_AMD_K8 /* CN700 doesn't have the support yet */
299 #define ACPI_IS_WAKEUP_EARLY 1
301 static int acpi_is_wakeup_early(void) {
305 print_debug("IN TEST WAKEUP\n");
307 /* Power management controller */
308 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
309 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
310 if (dev == PCI_DEV_INVALID) {
311 /* Power management controller */
312 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
313 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
314 if (dev == PCI_DEV_INVALID)
315 die("Power management controller not found\n");
318 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
319 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
321 /* Enable ACPI accessm RTC signal gated with PSON. */
322 pci_write_config8(dev, 0x81, 0x84);
324 tmp = inw(VT8237R_ACPI_IO_BASE + 0x04);
326 print_debug_hex8(tmp);
327 return ((tmp & (7 << 10)) >> 10) == 1 ? 3 : 0 ;
331 #if defined(__GNUC__)
332 void vt8237_early_spi_init(void)
335 volatile u16 *spireg;
338 /* Bus Control and Power Management */
339 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
340 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
342 if (dev == PCI_DEV_INVALID)
343 die("SB not found\n");
345 /* Put SPI base 20 d0 fe. */
346 tmp = pci_read_config32(dev, 0xbc);
347 pci_write_config32(dev, 0xbc,
348 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
350 /* Set SPI clock to 33MHz. */
351 spireg = (u16 *) (VT8237S_SPI_MEM_BASE + 0x6c);
356 /* This #if is special. ROMCC chokes on the (rom == NULL) comparison.
357 * Since the whole function is only called for one target and that target
358 * is compiled with GCC, hide the function from ROMCC and be happy.
360 #if defined(__GNUC__)
364 * 19:16 4 bit position in shadow EEPROM
369 * 27 ERDBG - enable read from 0x5c
372 * 24 SEEPR - write 1 when done updating, wait until SEELD is
374 * cleared by reset, if it is 1 writing is disabled
375 * 19:16 4 bit position in shadow EEPROM
376 * 15:0 data from shadow EEPROM
378 * After PCIRESET SEELD and SEEPR must be 1 and 1.
381 /* 1 = needs PCI reset, 0 don't reset, network initialized. */
383 /* FIXME: Maybe close the debug register after use? */
385 #define LAN_TIMEOUT 0x7FFFFFFF
387 int vt8237_early_network_init(struct vt8237_network_rom *rom)
389 struct vt8237_network_rom n;
395 unsigned int checksum;
397 /* Network adapter */
398 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
399 PCI_DEVICE_ID_VIA_8233_7), 0);
400 if (dev == PCI_DEV_INVALID) {
401 print_err("Network is disabled, please enable\n");
405 tmp = pci_read_config32(dev, 0x5c);
406 tmp |= 0x08000000; /* Enable ERDBG. */
407 pci_write_config32(dev, 0x5c, tmp);
409 status = ((pci_read_config32(dev, 0x5c) >> 24) & 0x3);
411 /* Network controller OK, EEPROM loaded. */
416 print_err("No config data specified, using default MAC!\n");
417 n.mac_address[0] = 0x0;
418 n.mac_address[1] = 0x0;
419 n.mac_address[2] = 0xde;
420 n.mac_address[3] = 0xad;
421 n.mac_address[4] = 0xbe;
422 n.mac_address[5] = 0xef;
431 n.pmu_data_reg = 0x0;
446 rom_write = (u16 *) rom;
448 /* Write all data except checksum and second to last byte. */
449 tmp &= 0xff000000; /* Leave reserved bits in. */
450 for (i = 0; i < 15; i++) {
451 pci_write_config32(dev, 0x58, tmp | (i << 16) | rom_write[i]);
452 /* Lame code FIXME */
453 checksum += rom_write[i] & 0xff;
454 /* checksum %= 256; */
455 checksum += (rom_write[i] >> 8) & 0xff;
456 /* checksum %= 256; */
459 checksum += (rom_write[15] & 0xff);
460 checksum = ~(checksum & 0xff);
461 tmp |= (((checksum & 0xff) << 8) | rom_write[15]);
463 /* Write last byte and checksum. */
464 pci_write_config32(dev, 0x58, (15 << 16) | tmp);
466 tmp = pci_read_config32(dev, 0x5c);
467 pci_write_config32(dev, 0x5c, tmp | 0x01000000); /* Toggle SEEPR. */
469 /* Yes, this is a mess, but it's the easiest way to do it. */
470 /* XXX not so messy, but an explanation of the hack would have been better */
472 while ((((pci_read_config32(dev, 0x5c) >> 25) & 1) == 0)
473 && (loops < LAN_TIMEOUT)) {
477 if (loops >= LAN_TIMEOUT) {
478 print_err("Timeout - LAN controller didn't accept config\n");
482 /* We are done, config will be used after PCIRST#. */