2 * This file is part of the coreboot project.
4 * Copyright (C) 2003 Linux Networx
5 * Copyright (C) 2004 SuSE Linux AG
6 * Copyright (C) 2004 Tyan Computer
7 * Copyright (C) 2010 Joseph Smith <joe@settoplinux.org>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; version 2 of
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 #include <console/console.h>
25 #include <device/device.h>
26 #include <device/pci.h>
27 #include <device/pci_ids.h>
28 #include <device/pci_ops.h>
29 #include <pc80/mc146818rtc.h>
30 #include <pc80/isa-dma.h>
36 typedef struct southbridge_intel_i82801dx_config config_t;
38 static void i82801dx_enable_ioapic(struct device *dev)
41 volatile u32 *ioapic_index = (volatile u32 *)(IO_APIC_ADDR);
42 volatile u32 *ioapic_data = (volatile u32 *)(IO_APIC_ADDR + 0x10);
44 /* Set ACPI base address (I/O space). */
45 pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1));
47 /* Enable ACPI I/O and power management. */
48 pci_write_config8(dev, ACPI_CNTL, 0x10);
50 reg32 = pci_read_config32(dev, GEN_CNTL);
51 reg32 |= (3 << 7); /* Enable IOAPIC */
52 reg32 |= (1 << 13); /* Coprocessor error enable */
53 reg32 |= (1 << 1); /* Delayed transaction enable */
54 reg32 |= (1 << 2); /* DMA collection buffer enable */
55 pci_write_config32(dev, GEN_CNTL, reg32);
56 printk(BIOS_DEBUG, "IOAPIC Southbridge enabled %x\n", reg32);
59 *ioapic_data = (1 << 25);
63 printk(BIOS_DEBUG, "Southbridge APIC ID = %x\n", reg32);
64 if (reg32 != (1 << 25))
67 *ioapic_index = 3; /* Select Boot Configuration register. */
68 *ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */
71 static void i82801dx_enable_serial_irqs(struct device *dev)
73 /* Set packet length and toggle silent mode bit. */
74 pci_write_config8(dev, SERIRQ_CNTL,
75 (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0));
76 pci_write_config8(dev, SERIRQ_CNTL,
77 (1 << 7) | (0 << 6) | ((21 - 17) << 2) | (0 << 0));
80 static void i82801dx_pirq_init(device_t dev)
82 /* Get the chip configuration */
83 config_t *config = dev->chip_info;
85 pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing);
86 pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing);
87 pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing);
88 pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing);
89 pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing);
90 pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing);
91 pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing);
92 pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing);
95 static void i82801dx_power_options(device_t dev)
102 int pwr_on = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
105 /* Which state do we want to goto after g3 (power restored)?
109 * If the option is not existent (Laptops), use MAINBOARD_POWER_ON.
111 if (get_option(&pwr_on, "power_on_after_fail") < 0)
112 pwr_on = MAINBOARD_POWER_ON;
114 reg8 = pci_read_config8(dev, GEN_PMCON_3);
117 case MAINBOARD_POWER_OFF:
121 case MAINBOARD_POWER_ON:
125 case MAINBOARD_POWER_KEEP:
127 state = "state keep";
133 reg8 &= ~(1 << 3); /* minimum asssertion is 1 to 2 RTCCLK */
135 pci_write_config8(dev, GEN_PMCON_3, reg8);
136 printk(BIOS_INFO, "Set power %s after power failure.\n", state);
138 /* Set up NMI on errors. */
140 reg8 &= 0x0f; /* Higher Nibble must be 0 */
141 reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */
142 // reg8 &= ~(1 << 2); /* PCI SERR# Enable */
143 reg8 |= (1 << 2); /* PCI SERR# Disable for now */
147 nmi_option = NMI_OFF;
148 get_option(&nmi_option, "nmi");
150 printk(BIOS_INFO, "NMI sources enabled.\n");
151 reg8 &= ~(1 << 7); /* Set NMI. */
153 printk(BIOS_INFO, "NMI sources disabled.\n");
154 reg8 |= ( 1 << 7); /* Disable NMI. */
158 /* Set SMI# rate down and enable CPU_SLP# */
159 reg16 = pci_read_config16(dev, GEN_PMCON_1);
160 reg16 &= ~(3 << 0); // SMI# rate 1 minute
161 reg16 |= (1 << 5); // CPUSLP_EN Desktop only
162 pci_write_config16(dev, GEN_PMCON_1, reg16);
164 pmbase = pci_read_config16(dev, 0x40) & 0xfffe;
166 /* Set up power management block and determine sleep mode */
167 reg32 = inl(pmbase + 0x04); // PM1_CNT
169 reg32 &= ~(7 << 10); // SLP_TYP
170 reg32 |= (1 << 0); // SCI_EN
171 outl(reg32, pmbase + 0x04);
174 static void gpio_init(device_t dev)
176 /* This should be done in romstage.c already */
177 pci_write_config32(dev, GPIO_BASE, (GPIOBASE_ADDR | 1));
178 pci_write_config8(dev, GPIO_CNTL, 0x10);
181 static void i82801dx_rtc_init(struct device *dev)
187 reg8 = pci_read_config8(dev, GEN_PMCON_3);
188 rtc_failed = reg8 & RTC_BATTERY_DEAD;
190 reg8 &= ~(1 << 1); /* Preserve the power fail state. */
191 pci_write_config8(dev, GEN_PMCON_3, reg8);
193 reg32 = pci_read_config32(dev, GEN_STS);
194 rtc_failed |= reg32 & (1 << 2);
195 rtc_init(rtc_failed);
197 /* Enable access to the upper 128 byte bank of CMOS RAM. */
198 pci_write_config8(dev, RTC_CONF, 0x04);
201 static void i82801dx_lpc_route_dma(struct device *dev, u8 mask)
206 reg16 = pci_read_config16(dev, PCI_DMA_CFG);
208 for (i = 0; i < 8; i++) {
211 reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2);
213 pci_write_config16(dev, PCI_DMA_CFG, reg16);
216 static void i82801dx_lpc_decode_en(device_t dev)
218 /* Decode 0x3F8-0x3FF (COM1) for COMA port, 0x2F8-0x2FF (COM2) for COMB.
219 * LPT decode defaults to 0x378-0x37F and 0x778-0x77F.
220 * Floppy decode defaults to 0x3F0-0x3F5, 0x3F7.
221 * We also need to set the value for LPC I/F Enables Register.
223 pci_write_config8(dev, COM_DEC, 0x10);
224 pci_write_config16(dev, LPC_EN, 0x300F);
227 /* ICH4 does not mention HPET in the docs, but
228 * all ICH3 and ICH4 do have HPETs built in.
230 static void enable_hpet(struct device *dev)
232 u32 reg32, hpet, val;
234 /* Set HPET base address and enable it */
235 printk(BIOS_DEBUG, "Enabling HPET at 0x%x\n", HPET_ADDR);
236 reg32 = pci_read_config32(dev, GEN_CNTL);
238 * Bit 17 is HPET enable bit.
239 * Bit 16:15 control the HPET base address.
241 reg32 &= ~(3 << 15); /* Clear it */
243 hpet = HPET_ADDR >> 12;
246 reg32 |= (hpet << 15);
247 reg32 |= (1 << 17); /* Enable HPET. */
248 pci_write_config32(dev, GEN_CNTL, reg32);
250 /* Check to see whether it took */
251 reg32 = pci_read_config32(dev, GEN_CNTL);
255 if ((val & 0x4) && (hpet == (val & 0x3))) {
256 printk(BIOS_INFO, "HPET enabled at 0x%x\n", HPET_ADDR);
258 printk(BIOS_WARNING, "HPET was not enabled correctly\n");
259 reg32 &= ~(1 << 17); /* Clear Enable */
260 pci_write_config32(dev, GEN_CNTL, reg32);
264 static void lpc_init(struct device *dev)
266 /* Set the value for PCI command register. */
267 pci_write_config16(dev, PCI_COMMAND, 0x000f);
269 /* IO APIC initialization. */
270 i82801dx_enable_ioapic(dev);
272 i82801dx_enable_serial_irqs(dev);
274 /* Setup the PIRQ. */
275 i82801dx_pirq_init(dev);
277 /* Setup power options. */
278 i82801dx_power_options(dev);
280 /* Set the state of the GPIO lines. */
283 /* Initialize the real time clock. */
284 i82801dx_rtc_init(dev);
287 i82801dx_lpc_route_dma(dev, 0xff);
289 /* Initialize ISA DMA. */
292 /* Setup decode ports and LPC I/F enables. */
293 i82801dx_lpc_decode_en(dev);
295 /* Initialize the High Precision Event Timers */
299 static void i82801dx_lpc_read_resources(device_t dev)
301 struct resource *res;
303 /* Get the normal PCI resources of this device. */
304 pci_dev_read_resources(dev);
306 /* Add an extra subtractive resource for both memory and I/O. */
307 res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
310 res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
311 IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
313 res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
314 res->base = 0xff800000;
315 res->size = 0x00800000; /* 8 MB for flash */
316 res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
317 IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
319 res = new_resource(dev, 3); /* IOAPIC */
320 res->base = 0xfec00000;
321 res->size = 0x00001000;
322 res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
325 static struct device_operations lpc_ops = {
326 .read_resources = i82801dx_lpc_read_resources,
327 .set_resources = pci_dev_set_resources,
328 .enable_resources = pci_dev_enable_resources,
330 .scan_bus = scan_static_bus,
331 .enable = i82801dx_enable,
335 static const struct pci_driver lpc_driver_db __pci_driver = {
337 .vendor = PCI_VENDOR_ID_INTEL,
338 .device = PCI_DEVICE_ID_INTEL_82801DB_LPC,
342 static const struct pci_driver lpc_driver_dbm __pci_driver = {
344 .vendor = PCI_VENDOR_ID_INTEL,
345 .device = PCI_DEVICE_ID_INTEL_82801DBM_LPC,