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\r\n");
43 if (host_status & (1 << 4))
44 print_err("Interrupt/SMI# was Failed Bus Transaction\r\n");
45 if (host_status & (1 << 3))
46 print_err("Bus error\r\n");
47 if (host_status & (1 << 2))
48 print_err("Device error\r\n");
49 if (host_status & (1 << 1))
50 print_debug("Interrupt/SMI# completed successfully\r\n");
51 if (host_status & (1 << 0))
52 print_err("Host busy\r\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\r\n");
65 /* Yes, this is a mess, but it's the easiest way to do it. */
66 while ((inb(SMBHSTSTAT) & 1) == 1 && loops < SMBUS_TIMEOUT)
69 smbus_print_error(inb(SMBHSTSTAT), loops);
73 * Reset and take ownership of the SMBus.
75 static void smbus_reset(void)
77 outb(HOST_RESET, SMBHSTSTAT);
79 /* Datasheet says we have to read it to take ownership of SMBus. */
82 PRINT_DEBUG("After reset status: ");
83 PRINT_DEBUG_HEX16(inb(SMBHSTSTAT));
88 * Read a byte from the SMBus.
90 * @param dimm The address location of the DIMM on the SMBus.
91 * @param offset The offset the data is located at.
93 u8 smbus_read_byte(u8 dimm, u8 offset)
98 PRINT_DEBUG_HEX16(dimm);
99 PRINT_DEBUG(" OFFSET ");
100 PRINT_DEBUG_HEX16(offset);
105 /* Clear host data port. */
106 outb(0x00, SMBHSTDAT0);
108 smbus_wait_until_ready();
110 /* Actual addr to reg format. */
113 outb(dimm, SMBXMITADD);
114 outb(offset, SMBHSTCMD);
116 /* Start transaction, byte data read. */
117 outb(0x48, SMBHSTCTL);
119 smbus_wait_until_ready();
121 val = inb(SMBHSTDAT0);
122 PRINT_DEBUG("Read: ");
123 PRINT_DEBUG_HEX16(val);
126 /* Probably don't have to do this, but it can't hurt. */
133 * Enable the SMBus on VT8237R-based systems.
135 void enable_smbus(void)
139 /* Power management controller */
140 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
141 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
142 if (dev == PCI_DEV_INVALID) {
143 /* Power management controller */
144 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
145 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
146 if (dev == PCI_DEV_INVALID)
147 die("Power management controller not found\r\n");
151 * 7 = SMBus Clock from RTC 32.768KHz
152 * 5 = Internal PLL reset from susp
154 pci_write_config8(dev, VT8237R_POWER_WELL, 0xa0);
157 pci_write_config16(dev, VT8237R_SMBUS_IO_BASE_REG,
158 VT8237R_SMBUS_IO_BASE | 0x1);
160 /* SMBus Host Configuration, enable. */
161 pci_write_config8(dev, VT8237R_SMBUS_HOST_CONF, 0x01);
163 /* Make it work for I/O. */
164 pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO);
168 /* Reset the internal pointer. */
173 * A fixup for some systems that need time for the SMBus to "warm up". This is
174 * needed on some VT823x based systems, where the SMBus spurts out bad data for
175 * a short time after power on. This has been seen on the VIA Epia series and
176 * Jetway J7F2-series. It reads the ID byte from SMBus, looking for
177 * known-good data from a slot/address. Exits on either good data or a timeout.
179 * TODO: This should probably go into some global file, but one would need to
180 * be created just for it. If some other chip needs/wants it, we can
181 * worry about it then.
183 * @param ctrl The memory controller and SMBus addresses.
185 void smbus_fixup(const struct mem_controller *ctrl)
187 int i, ram_slots, current_slot = 0;
190 ram_slots = ARRAY_SIZE(ctrl->channel0);
192 print_err("smbus_fixup() thinks there are no RAM slots!\r\n");
196 PRINT_DEBUG("Waiting for SMBus to warm up");
199 * Bad SPD data should be either 0 or 0xff, but YMMV. So we look for
200 * the ID bytes of SDRAM, DDR, DDR2, and DDR3 (and anything in between).
201 * VT8237R has only been seen on DDR and DDR2 based systems, so far.
203 for (i = 0; (i < SMBUS_TIMEOUT && ((result < SPD_MEMORY_TYPE_SDRAM) ||
204 (result > SPD_MEMORY_TYPE_SDRAM_DDR3))); i++) {
206 if (current_slot > ram_slots)
209 result = smbus_read_byte(ctrl->channel0[current_slot],
215 if (i >= SMBUS_TIMEOUT)
216 print_err("SMBus timed out while warming up\r\n");
218 PRINT_DEBUG("Done\r\n");
221 /* FIXME: Better separate the NB and SB, will be done once it works. */
223 void vt8237_sb_enable_fid_vid(void)
225 device_t dev, devctl;
227 /* Power management controller */
228 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
229 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
230 if (dev == PCI_DEV_INVALID) {
231 /* Power management controller */
232 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
233 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
234 if (dev == PCI_DEV_INVALID)
237 devctl = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
238 PCI_DEVICE_ID_VIA_VT8237_VLINK), 0);
240 if (devctl == PCI_DEV_INVALID)
243 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
244 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
246 /* Enable ACPI accessm RTC signal gated with PSON. */
247 pci_write_config8(dev, 0x81, 0x84);
250 * Allow SLP# signal to assert LDTSTOP_L.
251 * Will work for C3 and for FID/VID change.
254 outb(0xff, VT8237R_ACPI_IO_BASE + 0x50);
256 /* Reduce further the STPCLK/LDTSTP signal to 5us. */
257 pci_write_config8(dev, 0xec, 0x4);
259 /* So the chip knows we are on AMD. */
260 pci_write_config8(devctl, 0x7c, 0x7f);
265 /* Set ACPI base address to I/O VT8237R_ACPI_IO_BASE. */
266 pci_write_config16(dev, 0x88, VT8237R_ACPI_IO_BASE | 0x1);
268 /* Enable ACPI accessm RTC signal gated with PSON. */
269 pci_write_config8(dev, 0x81, 0x84);
272 * Allow SLP# signal to assert LDTSTOP_L.
273 * Will work for C3 and for FID/VID change.
275 outb(0x1, VT8237R_ACPI_IO_BASE + 0x11);
278 void enable_rom_decode(void)
282 /* Power management controller */
283 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
284 PCI_DEVICE_ID_VIA_VT8237R_LPC), 0);
285 if (dev == PCI_DEV_INVALID) {
286 /* Power management controller */
287 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
288 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
289 if (dev == PCI_DEV_INVALID)
293 /* ROM decode last 1MB FFC00000 - FFFFFFFF. */
294 pci_write_config8(dev, 0x41, 0x7f);
297 #if defined(__GNUC__)
298 void vt8237_early_spi_init(void)
301 volatile u16 *spireg;
304 /* Bus Control and Power Management */
305 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
306 PCI_DEVICE_ID_VIA_VT8237S_LPC), 0);
308 if (dev == PCI_DEV_INVALID)
309 die("SB not found\r\n");
311 /* Put SPI base 20 d0 fe. */
312 tmp = pci_read_config32(dev, 0xbc);
313 pci_write_config32(dev, 0xbc,
314 (VT8237S_SPI_MEM_BASE >> 8) | (tmp & 0xFF000000));
316 /* Set SPI clock to 33MHz. */
317 spireg = (u16 *) (VT8237S_SPI_MEM_BASE + 0x6c);
322 /* This #if is special. ROMCC chokes on the (rom == NULL) comparison.
323 * Since the whole function is only called for one target and that target
324 * is compiled with GCC, hide the function from ROMCC and be happy.
326 #if defined(__GNUC__)
330 * 19:16 4 bit position in shadow EEPROM
335 * 27 ERDBG - enable read from 0x5c
338 * 24 SEEPR - write 1 when done updating, wait until SEELD is
340 * cleared by reset, if it is 1 writing is disabled
341 * 19:16 4 bit position in shadow EEPROM
342 * 15:0 data from shadow EEPROM
344 * After PCIRESET SEELD and SEEPR must be 1 and 1.
347 /* 1 = needs PCI reset, 0 don't reset, network initialized. */
349 /* FIXME: Maybe close the debug register after use? */
351 #define LAN_TIMEOUT 0x7FFFFFFF
353 int vt8237_early_network_init(struct vt8237_network_rom *rom)
355 struct vt8237_network_rom n;
361 unsigned int checksum;
363 /* Network adapter */
364 dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA,
365 PCI_DEVICE_ID_VIA_8233_7), 0);
366 if (dev == PCI_DEV_INVALID) {
367 print_err("Network is disabled, please enable\n");
371 tmp = pci_read_config32(dev, 0x5c);
372 tmp |= 0x08000000; /* Enable ERDBG. */
373 pci_write_config32(dev, 0x5c, tmp);
375 status = ((pci_read_config32(dev, 0x5c) >> 24) & 0x3);
377 /* Network controller OK, EEPROM loaded. */
382 print_err("No config data specified, using default MAC!\n");
383 n.mac_address[0] = 0x0;
384 n.mac_address[1] = 0x0;
385 n.mac_address[2] = 0xde;
386 n.mac_address[3] = 0xad;
387 n.mac_address[4] = 0xbe;
388 n.mac_address[5] = 0xef;
397 n.pmu_data_reg = 0x0;
412 rom_write = (u16 *) rom;
414 /* Write all data except checksum and second to last byte. */
415 tmp &= 0xff000000; /* Leave reserved bits in. */
416 for (i = 0; i < 15; i++) {
417 pci_write_config32(dev, 0x58, tmp | (i << 16) | rom_write[i]);
418 /* Lame code FIXME */
419 checksum += rom_write[i] & 0xff;
420 /* checksum %= 256; */
421 checksum += (rom_write[i] >> 8) & 0xff;
422 /* checksum %= 256; */
425 checksum += (rom_write[15] & 0xff);
426 checksum = ~(checksum & 0xff);
427 tmp |= (((checksum & 0xff) << 8) | rom_write[15]);
429 /* Write last byte and checksum. */
430 pci_write_config32(dev, 0x58, (15 << 16) | tmp);
432 tmp = pci_read_config32(dev, 0x5c);
433 pci_write_config32(dev, 0x5c, tmp | 0x01000000); /* Toggle SEEPR. */
435 /* Yes, this is a mess, but it's the easiest way to do it. */
436 while ((((pci_read_config32(dev, 0x5c) >> 25) & 1) == 0)
437 && (loops < LAN_TIMEOUT)) {
441 if (loops >= LAN_TIMEOUT) {
442 print_err("Timeout - LAN controller didn't accept config\n");
446 /* We are done, config will be used after PCIRST#. */