arch/powerpc/platforms/fsl_uli1575.c

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