1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ULI M1575 setup code - specific to Freescale boards 4 * 5 * Copyright 2007 Freescale Semiconductor Inc. 6 */ 7 8 #include <linux/stddef.h> 9 #include <linux/kernel.h> 10 #include <linux/pci.h> 11 #include <linux/interrupt.h> 12 #include <linux/mc146818rtc.h> 13 #include <linux/of_irq.h> 14 15 #include <asm/pci-bridge.h> 16 #include <asm/ppc-pci.h> 17 18 #include <sysdev/fsl_pci.h> 19 20 #define ULI_PIRQA 0x08 21 #define ULI_PIRQB 0x09 22 #define ULI_PIRQC 0x0a 23 #define ULI_PIRQD 0x0b 24 #define ULI_PIRQE 0x0c 25 #define ULI_PIRQF 0x0d 26 #define ULI_PIRQG 0x0e 27 28 #define ULI_8259_NONE 0x00 29 #define ULI_8259_IRQ1 0x08 30 #define ULI_8259_IRQ3 0x02 31 #define ULI_8259_IRQ4 0x04 32 #define ULI_8259_IRQ5 0x05 33 #define ULI_8259_IRQ6 0x07 34 #define ULI_8259_IRQ7 0x06 35 #define ULI_8259_IRQ9 0x01 36 #define ULI_8259_IRQ10 0x03 37 #define ULI_8259_IRQ11 0x09 38 #define ULI_8259_IRQ12 0x0b 39 #define ULI_8259_IRQ14 0x0d 40 #define ULI_8259_IRQ15 0x0f 41 42 static u8 uli_pirq_to_irq[8] = { 43 ULI_8259_IRQ9, /* PIRQA */ 44 ULI_8259_IRQ10, /* PIRQB */ 45 ULI_8259_IRQ11, /* PIRQC */ 46 ULI_8259_IRQ12, /* PIRQD */ 47 ULI_8259_IRQ5, /* PIRQE */ 48 ULI_8259_IRQ6, /* PIRQF */ 49 ULI_8259_IRQ7, /* PIRQG */ 50 ULI_8259_NONE, /* PIRQH */ 51 }; 52 53 static inline bool is_quirk_valid(void) 54 { 55 return (machine_is(mpc86xx_hpcn) || 56 machine_is(mpc8544_ds) || 57 machine_is(p2020_ds) || 58 machine_is(mpc8572_ds)); 59 } 60 61 /* Bridge */ 62 static void early_uli5249(struct pci_dev *dev) 63 { 64 unsigned char temp; 65 66 if (!is_quirk_valid()) 67 return; 68 69 pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_IO | 70 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 71 72 /* read/write lock */ 73 pci_read_config_byte(dev, 0x7c, &temp); 74 pci_write_config_byte(dev, 0x7c, 0x80); 75 76 /* set as P2P bridge */ 77 pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01); 78 dev->class |= 0x1; 79 80 /* restore lock */ 81 pci_write_config_byte(dev, 0x7c, temp); 82 } 83 84 85 static void quirk_uli1575(struct pci_dev *dev) 86 { 87 int i; 88 89 if (!is_quirk_valid()) 90 return; 91 92 /* 93 * ULI1575 interrupts route setup 94 */ 95 96 /* ULI1575 IRQ mapping conf register maps PIRQx to IRQn */ 97 for (i = 0; i < 4; i++) { 98 u8 val = uli_pirq_to_irq[i*2] | (uli_pirq_to_irq[i*2+1] << 4); 99 pci_write_config_byte(dev, 0x48 + i, val); 100 } 101 102 /* USB 1.1 OHCI controller 1: dev 28, func 0 - IRQ12 */ 103 pci_write_config_byte(dev, 0x86, ULI_PIRQD); 104 105 /* USB 1.1 OHCI controller 2: dev 28, func 1 - IRQ9 */ 106 pci_write_config_byte(dev, 0x87, ULI_PIRQA); 107 108 /* USB 1.1 OHCI controller 3: dev 28, func 2 - IRQ10 */ 109 pci_write_config_byte(dev, 0x88, ULI_PIRQB); 110 111 /* Lan controller: dev 27, func 0 - IRQ6 */ 112 pci_write_config_byte(dev, 0x89, ULI_PIRQF); 113 114 /* AC97 Audio controller: dev 29, func 0 - IRQ6 */ 115 pci_write_config_byte(dev, 0x8a, ULI_PIRQF); 116 117 /* Modem controller: dev 29, func 1 - IRQ6 */ 118 pci_write_config_byte(dev, 0x8b, ULI_PIRQF); 119 120 /* HD Audio controller: dev 29, func 2 - IRQ6 */ 121 pci_write_config_byte(dev, 0x8c, ULI_PIRQF); 122 123 /* SATA controller: dev 31, func 1 - IRQ5 */ 124 pci_write_config_byte(dev, 0x8d, ULI_PIRQE); 125 126 /* SMB interrupt: dev 30, func 1 - IRQ7 */ 127 pci_write_config_byte(dev, 0x8e, ULI_PIRQG); 128 129 /* PMU ACPI SCI interrupt: dev 30, func 2 - IRQ7 */ 130 pci_write_config_byte(dev, 0x8f, ULI_PIRQG); 131 132 /* USB 2.0 controller: dev 28, func 3 */ 133 pci_write_config_byte(dev, 0x74, ULI_8259_IRQ11); 134 135 /* Primary PATA IDE IRQ: 14 136 * Secondary PATA IDE IRQ: 15 137 */ 138 pci_write_config_byte(dev, 0x44, 0x30 | ULI_8259_IRQ14); 139 pci_write_config_byte(dev, 0x75, ULI_8259_IRQ15); 140 } 141 142 static void quirk_final_uli1575(struct pci_dev *dev) 143 { 144 /* Set i8259 interrupt trigger 145 * IRQ 3: Level 146 * IRQ 4: Level 147 * IRQ 5: Level 148 * IRQ 6: Level 149 * IRQ 7: Level 150 * IRQ 9: Level 151 * IRQ 10: Level 152 * IRQ 11: Level 153 * IRQ 12: Level 154 * IRQ 14: Edge 155 * IRQ 15: Edge 156 */ 157 if (!is_quirk_valid()) 158 return; 159 160 outb(0xfa, 0x4d0); 161 outb(0x1e, 0x4d1); 162 163 /* setup RTC */ 164 CMOS_WRITE(RTC_SET, RTC_CONTROL); 165 CMOS_WRITE(RTC_24H, RTC_CONTROL); 166 167 /* ensure month, date, and week alarm fields are ignored */ 168 CMOS_WRITE(0, RTC_VALID); 169 170 outb_p(0x7c, 0x72); 171 outb_p(RTC_ALARM_DONT_CARE, 0x73); 172 173 outb_p(0x7d, 0x72); 174 outb_p(RTC_ALARM_DONT_CARE, 0x73); 175 } 176 177 /* SATA */ 178 static void quirk_uli5288(struct pci_dev *dev) 179 { 180 unsigned char c; 181 unsigned int d; 182 183 if (!is_quirk_valid()) 184 return; 185 186 /* read/write lock */ 187 pci_read_config_byte(dev, 0x83, &c); 188 pci_write_config_byte(dev, 0x83, c|0x80); 189 190 pci_read_config_dword(dev, PCI_CLASS_REVISION, &d); 191 d = (d & 0xff) | (PCI_CLASS_STORAGE_SATA_AHCI << 8); 192 pci_write_config_dword(dev, PCI_CLASS_REVISION, d); 193 194 /* restore lock */ 195 pci_write_config_byte(dev, 0x83, c); 196 197 /* disable emulated PATA mode enabled */ 198 pci_read_config_byte(dev, 0x84, &c); 199 pci_write_config_byte(dev, 0x84, c & ~0x01); 200 } 201 202 /* PATA */ 203 static void quirk_uli5229(struct pci_dev *dev) 204 { 205 unsigned short temp; 206 207 if (!is_quirk_valid()) 208 return; 209 210 pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE | 211 PCI_COMMAND_MASTER | PCI_COMMAND_IO); 212 213 /* Enable Native IRQ 14/15 */ 214 pci_read_config_word(dev, 0x4a, &temp); 215 pci_write_config_word(dev, 0x4a, temp | 0x1000); 216 } 217 218 /* We have to do a dummy read on the P2P for the RTC to work, WTF */ 219 static void quirk_final_uli5249(struct pci_dev *dev) 220 { 221 int i; 222 u8 *dummy; 223 struct pci_bus *bus = dev->bus; 224 struct resource *res; 225 resource_size_t end = 0; 226 227 for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCES+3; i++) { 228 unsigned long flags = pci_resource_flags(dev, i); 229 if ((flags & (IORESOURCE_MEM|IORESOURCE_PREFETCH)) == IORESOURCE_MEM) 230 end = pci_resource_end(dev, i); 231 } 232 233 pci_bus_for_each_resource(bus, res, i) { 234 if (res && res->flags & IORESOURCE_MEM) { 235 if (res->end == end) 236 dummy = ioremap(res->start, 0x4); 237 else 238 dummy = ioremap(res->end - 3, 0x4); 239 if (dummy) { 240 in_8(dummy); 241 iounmap(dummy); 242 } 243 break; 244 } 245 } 246 } 247 248 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249); 249 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575); 250 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288); 251 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229); 252 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5249, quirk_final_uli5249); 253 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x1575, quirk_final_uli1575); 254 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229); 255 256 static void hpcd_quirk_uli1575(struct pci_dev *dev) 257 { 258 u32 temp32; 259 260 if (!machine_is(mpc86xx_hpcd)) 261 return; 262 263 /* Disable INTx */ 264 pci_read_config_dword(dev, 0x48, &temp32); 265 pci_write_config_dword(dev, 0x48, (temp32 | 1<<26)); 266 267 /* Enable sideband interrupt */ 268 pci_read_config_dword(dev, 0x90, &temp32); 269 pci_write_config_dword(dev, 0x90, (temp32 | 1<<22)); 270 } 271 272 static void hpcd_quirk_uli5288(struct pci_dev *dev) 273 { 274 unsigned char c; 275 276 if (!machine_is(mpc86xx_hpcd)) 277 return; 278 279 pci_read_config_byte(dev, 0x83, &c); 280 c |= 0x80; 281 pci_write_config_byte(dev, 0x83, c); 282 283 pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01); 284 pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06); 285 286 pci_read_config_byte(dev, 0x83, &c); 287 c &= 0x7f; 288 pci_write_config_byte(dev, 0x83, c); 289 } 290 291 /* 292 * Since 8259PIC was disabled on the board, the IDE device can not 293 * use the legacy IRQ, we need to let the IDE device work under 294 * native mode and use the interrupt line like other PCI devices. 295 * IRQ14 is a sideband interrupt from IDE device to CPU and we use this 296 * as the interrupt for IDE device. 297 */ 298 static void hpcd_quirk_uli5229(struct pci_dev *dev) 299 { 300 unsigned char c; 301 302 if (!machine_is(mpc86xx_hpcd)) 303 return; 304 305 pci_read_config_byte(dev, 0x4b, &c); 306 c |= 0x10; 307 pci_write_config_byte(dev, 0x4b, c); 308 } 309 310 /* 311 * SATA interrupt pin bug fix 312 * There's a chip bug for 5288, The interrupt pin should be 2, 313 * not the read only value 1, So it use INTB#, not INTA# which 314 * actually used by the IDE device 5229. 315 * As of this bug, during the PCI initialization, 5288 read the 316 * irq of IDE device from the device tree, this function fix this 317 * bug by re-assigning a correct irq to 5288. 318 * 319 */ 320 static void hpcd_final_uli5288(struct pci_dev *dev) 321 { 322 struct pci_controller *hose = pci_bus_to_host(dev->bus); 323 struct device_node *hosenode = hose ? hose->dn : NULL; 324 struct of_phandle_args oirq; 325 u32 laddr[3]; 326 327 if (!machine_is(mpc86xx_hpcd)) 328 return; 329 330 if (!hosenode) 331 return; 332 333 oirq.np = hosenode; 334 oirq.args[0] = 2; 335 oirq.args_count = 1; 336 laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8); 337 laddr[1] = laddr[2] = 0; 338 of_irq_parse_raw(laddr, &oirq); 339 dev->irq = irq_create_of_mapping(&oirq); 340 } 341 342 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, hpcd_quirk_uli1575); 343 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, hpcd_quirk_uli5288); 344 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, hpcd_quirk_uli5229); 345 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, hpcd_final_uli5288); 346 347 static int uli_exclude_device(struct pci_controller *hose, u_char bus, u_char devfn) 348 { 349 if (hose->dn == fsl_pci_primary && bus == (hose->first_busno + 2)) { 350 /* exclude Modem controller */ 351 if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 1)) 352 return PCIBIOS_DEVICE_NOT_FOUND; 353 354 /* exclude HD Audio controller */ 355 if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 2)) 356 return PCIBIOS_DEVICE_NOT_FOUND; 357 } 358 359 return PCIBIOS_SUCCESSFUL; 360 } 361 362 void __init uli_init(void) 363 { 364 struct device_node *node; 365 struct device_node *pci_with_uli; 366 367 /* See if we have a ULI under the primary */ 368 369 node = of_find_node_by_name(NULL, "uli1575"); 370 while ((pci_with_uli = of_get_parent(node))) { 371 of_node_put(node); 372 node = pci_with_uli; 373 374 if (pci_with_uli == fsl_pci_primary) { 375 ppc_md.pci_exclude_device = uli_exclude_device; 376 break; 377 } 378 } 379 } 380