Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <arch/hpet.h> |
| 4 | #include <arch/io.h> |
| 5 | #include <arch/ioapic.h> |
| 6 | #include <console/console.h> |
| 7 | #include <device/device.h> |
| 8 | #include <device/pci.h> |
| 9 | #include <device/pci_ids.h> |
| 10 | #include <device/pci_ops.h> |
| 11 | #include <option.h> |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 12 | #include <pc80/i8259.h> |
Elyes Haouas | 357c229 | 2022-11-10 08:50:22 +0100 | [diff] [blame] | 13 | #include <pc80/isa-dma.h> |
| 14 | #include <pc80/mc146818rtc.h> |
| 15 | #include <types.h> |
| 16 | |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 17 | #include "chip.h" |
| 18 | #include "i82801dx.h" |
| 19 | |
| 20 | #define NMI_OFF 0 |
| 21 | |
| 22 | typedef struct southbridge_intel_i82801dx_config config_t; |
| 23 | |
| 24 | /** |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 25 | * Set miscellaneous static southbridge features. |
| 26 | * |
| 27 | * @param dev PCI device with I/O APIC control registers |
| 28 | */ |
| 29 | static void i82801dx_enable_ioapic(struct device *dev) |
| 30 | { |
| 31 | u32 reg32; |
| 32 | |
| 33 | reg32 = pci_read_config32(dev, GEN_CNTL); |
| 34 | reg32 |= (1 << 13); /* Coprocessor error enable (COPR_ERR_EN) */ |
| 35 | reg32 |= (3 << 7); /* IOAPIC enable (APIC_EN) */ |
| 36 | reg32 |= (1 << 2); /* DMA collection buffer enable (DCB_EN) */ |
| 37 | reg32 |= (1 << 1); /* Delayed transaction enable (DTE) */ |
| 38 | pci_write_config32(dev, GEN_CNTL, reg32); |
| 39 | printk(BIOS_DEBUG, "IOAPIC Southbridge enabled %x\n", reg32); |
| 40 | |
Kyösti Mälkki | d165357 | 2021-06-08 11:31:19 +0300 | [diff] [blame] | 41 | register_new_ioapic_gsi0(VIO_APIC_VADDR); |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 42 | |
| 43 | ioapic_set_boot_config(VIO_APIC_VADDR, true); |
| 44 | } |
| 45 | |
| 46 | static void i82801dx_enable_serial_irqs(struct device *dev) |
| 47 | { |
| 48 | /* Set packet length and toggle silent mode bit. */ |
| 49 | pci_write_config8(dev, SERIRQ_CNTL, |
| 50 | (1 << 7) | (1 << 6) | ((21 - 17) << 2) | (0 << 0)); |
| 51 | pci_write_config8(dev, SERIRQ_CNTL, |
| 52 | (1 << 7) | (0 << 6) | ((21 - 17) << 2) | (0 << 0)); |
| 53 | } |
| 54 | |
| 55 | static void i82801dx_pirq_init(struct device *dev) |
| 56 | { |
| 57 | /* Get the chip configuration */ |
| 58 | config_t *config = dev->chip_info; |
| 59 | |
| 60 | pci_write_config8(dev, PIRQA_ROUT, config->pirqa_routing); |
| 61 | pci_write_config8(dev, PIRQB_ROUT, config->pirqb_routing); |
| 62 | pci_write_config8(dev, PIRQC_ROUT, config->pirqc_routing); |
| 63 | pci_write_config8(dev, PIRQD_ROUT, config->pirqd_routing); |
| 64 | pci_write_config8(dev, PIRQE_ROUT, config->pirqe_routing); |
| 65 | pci_write_config8(dev, PIRQF_ROUT, config->pirqf_routing); |
| 66 | pci_write_config8(dev, PIRQG_ROUT, config->pirqg_routing); |
| 67 | pci_write_config8(dev, PIRQH_ROUT, config->pirqh_routing); |
| 68 | } |
| 69 | |
| 70 | static void i82801dx_power_options(struct device *dev) |
| 71 | { |
| 72 | u8 reg8; |
| 73 | u16 reg16, pmbase; |
| 74 | u32 reg32; |
| 75 | const char *state; |
| 76 | |
| 77 | /* Which state do we want to goto after g3 (power restored)? |
| 78 | * 0 == S0 Full On |
| 79 | * 1 == S5 Soft Off |
| 80 | * |
| 81 | * If the option is not existent (Laptops), use MAINBOARD_POWER_ON. |
| 82 | */ |
| 83 | const unsigned int pwr_on = get_uint_option("power_on_after_fail", MAINBOARD_POWER_ON); |
| 84 | |
| 85 | reg8 = pci_read_config8(dev, GEN_PMCON_3); |
| 86 | reg8 &= 0xfe; |
| 87 | switch (pwr_on) { |
| 88 | case MAINBOARD_POWER_OFF: |
| 89 | reg8 |= 1; |
| 90 | state = "off"; |
| 91 | break; |
| 92 | case MAINBOARD_POWER_ON: |
| 93 | reg8 &= ~1; |
| 94 | state = "on"; |
| 95 | break; |
| 96 | case MAINBOARD_POWER_KEEP: |
| 97 | reg8 &= ~1; |
| 98 | state = "state keep"; |
| 99 | break; |
| 100 | default: |
| 101 | state = "undefined"; |
| 102 | } |
| 103 | |
| 104 | reg8 &= ~(1 << 3); /* minimum assertion is 1 to 2 RTCCLK */ |
| 105 | |
| 106 | pci_write_config8(dev, GEN_PMCON_3, reg8); |
| 107 | printk(BIOS_INFO, "Set power %s after power failure.\n", state); |
| 108 | |
| 109 | /* Set up NMI on errors. */ |
| 110 | reg8 = inb(0x61); |
| 111 | reg8 &= 0x0f; /* Higher Nibble must be 0 */ |
| 112 | reg8 &= ~(1 << 3); /* IOCHK# NMI Enable */ |
| 113 | // reg8 &= ~(1 << 2); /* PCI SERR# Enable */ |
| 114 | reg8 |= (1 << 2); /* PCI SERR# Disable for now */ |
| 115 | outb(reg8, 0x61); |
| 116 | |
| 117 | reg8 = inb(0x70); |
| 118 | const unsigned int nmi_option = get_uint_option("nmi", NMI_OFF); |
| 119 | if (nmi_option) { |
| 120 | printk(BIOS_INFO, "NMI sources enabled.\n"); |
| 121 | reg8 &= ~(1 << 7); /* Set NMI. */ |
| 122 | } else { |
| 123 | printk(BIOS_INFO, "NMI sources disabled.\n"); |
| 124 | reg8 |= (1 << 7); /* Disable NMI. */ |
| 125 | } |
| 126 | outb(reg8, 0x70); |
| 127 | |
| 128 | /* Set SMI# rate down and enable CPU_SLP# */ |
| 129 | reg16 = pci_read_config16(dev, GEN_PMCON_1); |
| 130 | reg16 &= ~(3 << 0); // SMI# rate 1 minute |
| 131 | reg16 |= (1 << 5); // CPUSLP_EN Desktop only |
| 132 | pci_write_config16(dev, GEN_PMCON_1, reg16); |
| 133 | |
| 134 | pmbase = pci_read_config16(dev, 0x40) & 0xfffe; |
| 135 | |
| 136 | /* Set up power management block and determine sleep mode */ |
| 137 | reg32 = inl(pmbase + 0x04); // PM1_CNT |
| 138 | |
| 139 | reg32 &= ~(7 << 10); // SLP_TYP |
| 140 | reg32 |= (1 << 0); // SCI_EN |
| 141 | outl(reg32, pmbase + 0x04); |
| 142 | } |
| 143 | |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 144 | |
| 145 | static void i82801dx_rtc_init(struct device *dev) |
| 146 | { |
| 147 | u8 reg8; |
| 148 | u32 reg32; |
| 149 | int rtc_failed; |
| 150 | |
| 151 | reg8 = pci_read_config8(dev, GEN_PMCON_3); |
| 152 | rtc_failed = reg8 & RTC_BATTERY_DEAD; |
| 153 | if (rtc_failed) { |
| 154 | reg8 &= ~(1 << 1); /* Preserve the power fail state. */ |
| 155 | pci_write_config8(dev, GEN_PMCON_3, reg8); |
| 156 | } |
| 157 | reg32 = pci_read_config32(dev, GEN_STS); |
| 158 | rtc_failed |= reg32 & (1 << 2); |
| 159 | cmos_init(rtc_failed); |
| 160 | |
| 161 | /* Enable access to the upper 128 byte bank of CMOS RAM. */ |
| 162 | pci_write_config8(dev, RTC_CONF, 0x04); |
| 163 | } |
| 164 | |
| 165 | static void i82801dx_lpc_route_dma(struct device *dev, u8 mask) |
| 166 | { |
| 167 | u16 reg16; |
| 168 | int i; |
| 169 | |
| 170 | reg16 = pci_read_config16(dev, PCI_DMA_CFG); |
| 171 | reg16 &= 0x300; |
| 172 | for (i = 0; i < 8; i++) { |
| 173 | if (i == 4) |
| 174 | continue; |
| 175 | reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2); |
| 176 | } |
| 177 | pci_write_config16(dev, PCI_DMA_CFG, reg16); |
| 178 | } |
| 179 | |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 180 | /* ICH4 does not mention HPET in the docs, but |
| 181 | * all ICH3 and ICH4 do have HPETs built in. |
| 182 | */ |
| 183 | static void enable_hpet(struct device *dev) |
| 184 | { |
| 185 | u32 reg32, hpet, val; |
| 186 | |
| 187 | /* Set HPET base address and enable it */ |
| 188 | printk(BIOS_DEBUG, "Enabling HPET at 0x%x\n", HPET_BASE_ADDRESS); |
| 189 | reg32 = pci_read_config32(dev, GEN_CNTL); |
| 190 | /* |
| 191 | * Bit 17 is HPET enable bit. |
| 192 | * Bit 16:15 control the HPET base address. |
| 193 | */ |
| 194 | reg32 &= ~(3 << 15); /* Clear it */ |
| 195 | |
| 196 | hpet = HPET_BASE_ADDRESS >> 12; |
| 197 | hpet &= 0x3; |
| 198 | |
| 199 | reg32 |= (hpet << 15); |
| 200 | reg32 |= (1 << 17); /* Enable HPET. */ |
| 201 | pci_write_config32(dev, GEN_CNTL, reg32); |
| 202 | |
| 203 | /* Check to see whether it took */ |
| 204 | reg32 = pci_read_config32(dev, GEN_CNTL); |
| 205 | val = reg32 >> 15; |
| 206 | val &= 0x7; |
| 207 | |
| 208 | if ((val & 0x4) && (hpet == (val & 0x3))) { |
| 209 | printk(BIOS_INFO, "HPET enabled at 0x%x\n", HPET_BASE_ADDRESS); |
| 210 | } else { |
| 211 | printk(BIOS_WARNING, "HPET was not enabled correctly\n"); |
| 212 | reg32 &= ~(1 << 17); /* Clear Enable */ |
| 213 | pci_write_config32(dev, GEN_CNTL, reg32); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | static void lpc_init(struct device *dev) |
| 218 | { |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 219 | /* IO APIC initialization. */ |
| 220 | i82801dx_enable_ioapic(dev); |
| 221 | |
| 222 | i82801dx_enable_serial_irqs(dev); |
| 223 | |
| 224 | /* Setup the PIRQ. */ |
| 225 | i82801dx_pirq_init(dev); |
| 226 | |
| 227 | /* Setup power options. */ |
| 228 | i82801dx_power_options(dev); |
| 229 | |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 230 | /* Initialize the real time clock. */ |
| 231 | i82801dx_rtc_init(dev); |
| 232 | |
| 233 | /* Route DMA. */ |
| 234 | i82801dx_lpc_route_dma(dev, 0xff); |
| 235 | |
| 236 | /* Initialize ISA DMA. */ |
| 237 | isa_dma_init(); |
| 238 | |
Kyösti Mälkki | 7b73e852 | 2022-11-08 04:43:41 +0000 | [diff] [blame] | 239 | /* Initialize the High Precision Event Timers */ |
| 240 | enable_hpet(dev); |
| 241 | |
| 242 | setup_i8259(); |
| 243 | } |
| 244 | |
| 245 | static void i82801dx_lpc_read_resources(struct device *dev) |
| 246 | { |
| 247 | struct resource *res; |
| 248 | |
| 249 | /* Get the normal PCI resources of this device. */ |
| 250 | pci_dev_read_resources(dev); |
| 251 | |
| 252 | /* Add an extra subtractive resource for both memory and I/O. */ |
| 253 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| 254 | res->base = 0; |
| 255 | res->size = 0x1000; |
| 256 | res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | |
| 257 | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| 258 | |
| 259 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| 260 | res->base = 0xff800000; |
| 261 | res->size = 0x00800000; /* 8 MB for flash */ |
| 262 | res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | |
| 263 | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| 264 | |
| 265 | res = new_resource(dev, 3); /* IOAPIC */ |
| 266 | res->base = IO_APIC_ADDR; |
| 267 | res->size = 0x00001000; |
| 268 | res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; |
| 269 | } |
| 270 | |
| 271 | static struct device_operations lpc_ops = { |
| 272 | .read_resources = i82801dx_lpc_read_resources, |
| 273 | .set_resources = pci_dev_set_resources, |
| 274 | .enable_resources = pci_dev_enable_resources, |
| 275 | .init = lpc_init, |
| 276 | .scan_bus = scan_static_bus, |
| 277 | .enable = i82801dx_enable, |
| 278 | }; |
| 279 | |
| 280 | /* 82801DB/DBL */ |
| 281 | static const struct pci_driver lpc_driver_db __pci_driver = { |
| 282 | .ops = &lpc_ops, |
| 283 | .vendor = PCI_VID_INTEL, |
| 284 | .device = PCI_DID_INTEL_82801DB_LPC, |
| 285 | }; |
| 286 | |
| 287 | /* 82801DBM */ |
| 288 | static const struct pci_driver lpc_driver_dbm __pci_driver = { |
| 289 | .ops = &lpc_ops, |
| 290 | .vendor = PCI_VID_INTEL, |
| 291 | .device = PCI_DID_INTEL_82801DBM_LPC, |
| 292 | }; |