2 * This file is part of the coreboot project.
4 * Copyright (C) 2003 Linux Networx
5 * Copyright (C) 2003 SuSE Linux AG
6 * Copyright (C) 2005 Tyan Computer
7 * (Written by Yinghai Lu <yinghailu@gmail.com> for Tyan Computer)
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 /* From 82801DBM, needs to be fixed to support everything the 82801ER does. */
26 #include <console/console.h>
27 #include <device/device.h>
28 #include <device/pci.h>
29 #include <device/pci_ids.h>
30 #include <pc80/mc146818rtc.h>
31 #include <pc80/isa-dma.h>
37 typedef struct southbridge_intel_i82801bx_config config_t;
39 /* PIRQ[n]_ROUT[3:0] - PIRQ Routing Control
40 * 0x00 - 0000 = Reserved
41 * 0x01 - 0001 = Reserved
42 * 0x02 - 0010 = Reserved
48 * 0x08 - 1000 = Reserved
53 * 0x0D - 1101 = Reserved
56 * PIRQ[n]_ROUT[7] - PIRQ Routing Control
57 * 0x80 - The PIRQ is not routed.
70 * Use 0x0ef8 for a bitmap to cover all these IRQ's.
71 * Use the defined IRQ values above or set mainboard
72 * specific IRQ values in your mainboards Config.lb.
75 static void i82801bx_enable_apic(struct device *dev)
78 volatile uint32_t *ioapic_index = (volatile uint32_t *)0xfec00000;
79 volatile uint32_t *ioapic_data = (volatile uint32_t *)0xfec00010;
81 /* Set ACPI base address (I/O space). */
82 pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1));
84 /* Enable ACPI I/O and power management. */
85 pci_write_config8(dev, ACPI_CNTL, 0x10);
87 reg32 = pci_read_config32(dev, GEN_CNTL);
88 reg32 |= (3 << 7); /* Enable IOAPIC */
89 reg32 |= (1 << 13); /* Coprocessor error enable */
90 reg32 |= (1 << 1); /* Delayed transaction enable */
91 reg32 |= (1 << 2); /* DMA collection buffer enable */
92 pci_write_config32(dev, GEN_CNTL, reg32);
93 printk(BIOS_DEBUG, "IOAPIC Southbridge enabled %x\n", reg32);
96 *ioapic_data = (1 << 25);
100 printk(BIOS_DEBUG, "Southbridge APIC ID = %x\n", reg32);
101 if (reg32 != (1 << 25))
104 /* TODO: From i82801ca, needed/useful on other ICH? */
105 *ioapic_index = 3; /* Select Boot Configuration register. */
106 *ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */
109 static void i82801bx_enable_serial_irqs(struct device *dev)
111 /* Set packet length and toggle silent mode bit. */
112 pci_write_config8(dev, SERIRQ_CNTL,
113 (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0));
114 pci_write_config8(dev, SERIRQ_CNTL,
115 (1 << 7) | (0 << 6) | ((21 - 17) << 2) | (0 << 0));
116 /* TODO: Explain/#define the real meaning of these magic numbers. */
119 static void i82801bx_pirq_init(device_t dev, uint16_t ich_model)
121 /* Get the chip configuration */
122 config_t *config = dev->chip_info;
124 if (config->pirqa_routing) {
125 pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing);
127 pci_write_config8(dev, PIRQA_ROUT, PIRQA);
130 if (config->pirqb_routing) {
131 pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing);
133 pci_write_config8(dev, PIRQB_ROUT, PIRQB);
136 if (config->pirqc_routing) {
137 pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing);
139 pci_write_config8(dev, PIRQC_ROUT, PIRQC);
142 if (config->pirqd_routing) {
143 pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing);
145 pci_write_config8(dev, PIRQD_ROUT, PIRQD);
148 /* Route PIRQE - PIRQH (for ICH2-ICH9). */
149 if (ich_model >= 0x2440) {
151 if (config->pirqe_routing) {
152 pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing);
154 pci_write_config8(dev, PIRQE_ROUT, PIRQE);
157 if (config->pirqf_routing) {
158 pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing);
160 pci_write_config8(dev, PIRQF_ROUT, PIRQF);
163 if (config->pirqg_routing) {
164 pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing);
166 pci_write_config8(dev, PIRQG_ROUT, PIRQG);
169 if (config->pirqh_routing) {
170 pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing);
172 pci_write_config8(dev, PIRQH_ROUT, PIRQH);
177 static void i82801bx_power_options(device_t dev)
183 /* power after power fail */
184 /* FIXME this doesn't work! */
185 /* Which state do we want to goto after g3 (power restored)?
189 pci_write_config8(dev, GEN_PMCON_3, pwr_on ? 0 : 1);
190 printk(BIOS_INFO, "Set power %s if power fails\n", pwr_on ? "on" : "off");
192 /* Set up NMI on errors. */
194 byte &= ~(1 << 3); /* IOCHK# NMI Enable */
195 byte &= ~(1 << 2); /* PCI SERR# Enable */
199 nmi_option = NMI_OFF;
200 get_option(&nmi_option, "nmi");
202 byte &= ~(1 << 7); /* Set NMI. */
207 static void gpio_init(device_t dev)
209 /* Set the value for GPIO base address register and enable GPIO. */
210 pci_write_config32(dev, GPIO_BASE, (GPIO_BASE_ADDR | 1));
211 pci_write_config8(dev, GPIO_CNTL, 0x10);
214 static void i82801bx_rtc_init(struct device *dev)
220 reg8 = pci_read_config8(dev, GEN_PMCON_3);
221 rtc_failed = reg8 & RTC_BATTERY_DEAD;
223 reg8 &= ~(1 << 1); /* Preserve the power fail state. */
224 pci_write_config8(dev, GEN_PMCON_3, reg8);
226 reg32 = pci_read_config32(dev, GEN_STS);
227 rtc_failed |= reg32 & (1 << 2);
228 rtc_init(rtc_failed);
230 /* Enable access to the upper 128 byte bank of CMOS RAM. */
231 pci_write_config8(dev, RTC_CONF, 0x04);
234 static void i82801bx_lpc_route_dma(struct device *dev, uint8_t mask)
239 reg16 = pci_read_config16(dev, PCI_DMA_CFG);
241 for (i = 0; i < 8; i++) {
244 reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2);
246 pci_write_config16(dev, PCI_DMA_CFG, reg16);
249 static void i82801bx_lpc_decode_en(device_t dev, uint16_t ich_model)
251 /* Decode 0x3F8-0x3FF (COM1) for COMA port, 0x2F8-0x2FF (COM2) for COMB.
252 * LPT decode defaults to 0x378-0x37F and 0x778-0x77F.
253 * Floppy decode defaults to 0x3F0-0x3F5, 0x3F7.
254 * We also need to set the value for LPC I/F Enables Register.
255 * Note: ICH-ICH5 registers differ from ICH6-ICH9.
257 if (ich_model <= 0x24D0) {
258 pci_write_config8(dev, COM_DEC, 0x10);
259 pci_write_config16(dev, LPC_EN_ICH0_5, 0x300F);
260 } else if (ich_model >= 0x2640) {
261 pci_write_config8(dev, LPC_IO_DEC, 0x10);
262 pci_write_config16(dev, LPC_EN_ICH6_9, 0x300F);
266 static void lpc_init(struct device *dev)
268 uint16_t ich_model = pci_read_config16(dev, PCI_DEVICE_ID);
270 /* Set the value for PCI command register. */
271 pci_write_config16(dev, PCI_COMMAND, 0x000f);
273 /* IO APIC initialization. */
274 i82801bx_enable_apic(dev);
276 i82801bx_enable_serial_irqs(dev);
278 /* Setup the PIRQ. */
279 i82801bx_pirq_init(dev, ich_model);
281 /* Setup power options. */
282 i82801bx_power_options(dev);
284 /* Set the state of the GPIO lines. */
287 /* Initialize the real time clock. */
288 i82801bx_rtc_init(dev);
291 i82801bx_lpc_route_dma(dev, 0xff);
293 /* Initialize ISA DMA. */
296 /* Setup decode ports and LPC I/F enables. */
297 i82801bx_lpc_decode_en(dev, ich_model);
300 static void i82801bx_lpc_read_resources(device_t dev)
302 struct resource *res;
304 /* Get the normal PCI resources of this device. */
305 pci_dev_read_resources(dev);
307 /* Add an extra subtractive resource for both memory and I/O. */
308 res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
311 res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
312 IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
314 res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
315 res->base = 0xff800000;
316 res->size = 0x00800000; /* 8 MB for flash */
317 res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
318 IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
320 res = new_resource(dev, 3); /* IOAPIC */
321 res->base = 0xfec00000;
322 res->size = 0x00001000;
323 res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
326 static struct device_operations lpc_ops = {
327 .read_resources = i82801bx_lpc_read_resources,
328 .set_resources = pci_dev_set_resources,
329 .enable_resources = pci_dev_enable_resources,
331 .scan_bus = scan_static_bus,
332 .enable = i82801bx_enable,
335 static const struct pci_driver i82801aa_lpc __pci_driver = {
337 .vendor = PCI_VENDOR_ID_INTEL,
341 static const struct pci_driver i82801ab_lpc __pci_driver = {
343 .vendor = PCI_VENDOR_ID_INTEL,
347 static const struct pci_driver i82801ba_lpc __pci_driver = {
349 .vendor = PCI_VENDOR_ID_INTEL,
353 static const struct pci_driver i82801ca_lpc __pci_driver = {
355 .vendor = PCI_VENDOR_ID_INTEL,
359 static const struct pci_driver i82801db_lpc __pci_driver = {
361 .vendor = PCI_VENDOR_ID_INTEL,
365 static const struct pci_driver i82801dbm_lpc __pci_driver = {
367 .vendor = PCI_VENDOR_ID_INTEL,
371 /* 82801EB and 82801ER */
372 static const struct pci_driver i82801ex_lpc __pci_driver = {
374 .vendor = PCI_VENDOR_ID_INTEL,