kernel/2.6.29.6-aldebaran-rt/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 /* Bridge */
  55 static void __devinit early_uli5249(struct pci_dev *dev)
  56 {
  57         unsigned char temp;
  58
  59         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
  60                         !machine_is(mpc8572_ds))
  61                 return;
  62
  63         pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_IO |
  64                  PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
  65
  66         /* read/write lock */
  67         pci_read_config_byte(dev, 0x7c, &temp);
  68         pci_write_config_byte(dev, 0x7c, 0x80);
  69
  70         /* set as P2P bridge */
  71         pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
  72         dev->class |= 0x1;
  73
  74         /* restore lock */
  75         pci_write_config_byte(dev, 0x7c, temp);
  76 }
  77
  78
  79 static void __devinit quirk_uli1575(struct pci_dev *dev)
  80 {
  81         int i;
  82
  83         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
  84                         !machine_is(mpc8572_ds))
  85                 return;
  86
  87         /*
  88          * ULI1575 interrupts route setup
  89          */
  90
  91         /* ULI1575 IRQ mapping conf register maps PIRQx to IRQn */
  92         for (i = 0; i < 4; i++) {
  93                 u8 val = uli_pirq_to_irq[i*2] | (uli_pirq_to_irq[i*2+1] << 4);
  94                 pci_write_config_byte(dev, 0x48 + i, val);
  95         }
  96
  97         /* USB 1.1 OHCI controller 1: dev 28, func 0 - IRQ12 */
  98         pci_write_config_byte(dev, 0x86, ULI_PIRQD);
  99
 100         /* USB 1.1 OHCI controller 2: dev 28, func 1 - IRQ9 */
 101         pci_write_config_byte(dev, 0x87, ULI_PIRQA);
 102
 103         /* USB 1.1 OHCI controller 3: dev 28, func 2 - IRQ10 */
 104         pci_write_config_byte(dev, 0x88, ULI_PIRQB);
 105
 106         /* Lan controller: dev 27, func 0 - IRQ6 */
 107         pci_write_config_byte(dev, 0x89, ULI_PIRQF);
 108
 109         /* AC97 Audio controller: dev 29, func 0 - IRQ6 */
 110         pci_write_config_byte(dev, 0x8a, ULI_PIRQF);
 111
 112         /* Modem controller: dev 29, func 1 - IRQ6 */
 113         pci_write_config_byte(dev, 0x8b, ULI_PIRQF);
 114
 115         /* HD Audio controller: dev 29, func 2 - IRQ6 */
 116         pci_write_config_byte(dev, 0x8c, ULI_PIRQF);
 117
 118         /* SATA controller: dev 31, func 1 - IRQ5 */
 119         pci_write_config_byte(dev, 0x8d, ULI_PIRQE);
 120
 121         /* SMB interrupt: dev 30, func 1 - IRQ7 */
 122         pci_write_config_byte(dev, 0x8e, ULI_PIRQG);
 123
 124         /* PMU ACPI SCI interrupt: dev 30, func 2 - IRQ7 */
 125         pci_write_config_byte(dev, 0x8f, ULI_PIRQG);
 126
 127         /* USB 2.0 controller: dev 28, func 3 */
 128         pci_write_config_byte(dev, 0x74, ULI_8259_IRQ11);
 129
 130         /* Primary PATA IDE IRQ: 14
 131          * Secondary PATA IDE IRQ: 15
 132          */
 133         pci_write_config_byte(dev, 0x44, 0x30 | ULI_8259_IRQ14);
 134         pci_write_config_byte(dev, 0x75, ULI_8259_IRQ15);
 135 }
 136
 137 static void __devinit quirk_final_uli1575(struct pci_dev *dev)
 138 {
 139         /* Set i8259 interrupt trigger
 140          * IRQ 3:  Level
 141          * IRQ 4:  Level
 142          * IRQ 5:  Level
 143          * IRQ 6:  Level
 144          * IRQ 7:  Level
 145          * IRQ 9:  Level
 146          * IRQ 10: Level
 147          * IRQ 11: Level
 148          * IRQ 12: Level
 149          * IRQ 14: Edge
 150          * IRQ 15: Edge
 151          */
 152         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
 153                         !machine_is(mpc8572_ds))
 154                 return;
 155
 156         outb(0xfa, 0x4d0);
 157         outb(0x1e, 0x4d1);
 158
 159         /* setup RTC */
 160         CMOS_WRITE(RTC_SET, RTC_CONTROL);
 161         CMOS_WRITE(RTC_24H, RTC_CONTROL);
 162
 163         /* ensure month, date, and week alarm fields are ignored */
 164         CMOS_WRITE(0, RTC_VALID);
 165
 166         outb_p(0x7c, 0x72);
 167         outb_p(RTC_ALARM_DONT_CARE, 0x73);
 168
 169         outb_p(0x7d, 0x72);
 170         outb_p(RTC_ALARM_DONT_CARE, 0x73);
 171 }
 172
 173 /* SATA */
 174 static void __devinit quirk_uli5288(struct pci_dev *dev)
 175 {
 176         unsigned char c;
 177         unsigned int d;
 178
 179         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
 180                         !machine_is(mpc8572_ds))
 181                 return;
 182
 183         /* read/write lock */
 184         pci_read_config_byte(dev, 0x83, &c);
 185         pci_write_config_byte(dev, 0x83, c|0x80);
 186
 187         pci_read_config_dword(dev, PCI_CLASS_REVISION, &d);
 188         d = (d & 0xff) | (PCI_CLASS_STORAGE_SATA_AHCI << 8);
 189         pci_write_config_dword(dev, PCI_CLASS_REVISION, d);
 190
 191         /* restore lock */
 192         pci_write_config_byte(dev, 0x83, c);
 193
 194         /* disable emulated PATA mode enabled */
 195         pci_read_config_byte(dev, 0x84, &c);
 196         pci_write_config_byte(dev, 0x84, c & ~0x01);
 197 }
 198
 199 /* PATA */
 200 static void __devinit quirk_uli5229(struct pci_dev *dev)
 201 {
 202         unsigned short temp;
 203
 204         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
 205                         !machine_is(mpc8572_ds))
 206                 return;
 207
 208         pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE |
 209                 PCI_COMMAND_MASTER | PCI_COMMAND_IO);
 210
 211         /* Enable Native IRQ 14/15 */
 212         pci_read_config_word(dev, 0x4a, &temp);
 213         pci_write_config_word(dev, 0x4a, temp | 0x1000);
 214 }
 215
 216 /* We have to do a dummy read on the P2P for the RTC to work, WTF */
 217 static void __devinit quirk_final_uli5249(struct pci_dev *dev)
 218 {
 219         int i;
 220         u8 *dummy;
 221         struct pci_bus *bus = dev->bus;
 222         resource_size_t end = 0;
 223
 224         for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCES+3; i++) {
 225                 unsigned long flags = pci_resource_flags(dev, i);
 226                 if ((flags & (IORESOURCE_MEM|IORESOURCE_PREFETCH)) == IORESOURCE_MEM)
 227                         end = pci_resource_end(dev, i);
 228         }
 229
 230         for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
 231                 if ((bus->resource[i]) &&
 232                         (bus->resource[i]->flags & IORESOURCE_MEM)) {
 233                         if (bus->resource[i]->end == end)
 234                                 dummy = ioremap(bus->resource[i]->start, 0x4);
 235                         else
 236                                 dummy = ioremap(bus->resource[i]->end - 3, 0x4);
 237                         if (dummy) {
 238                                 in_8(dummy);
 239                                 iounmap(dummy);
 240                         }
 241                         break;
 242                 }
 243         }
 244 }
 245
 246 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);
 247 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
 248 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
 249 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
 250 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5249, quirk_final_uli5249);
 251 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x1575, quirk_final_uli1575);
 252 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
 253
 254 static void __devinit hpcd_quirk_uli1575(struct pci_dev *dev)
 255 {
 256         u32 temp32;
 257
 258         if (!machine_is(mpc86xx_hpcd))
 259                 return;
 260
 261         /* Disable INTx */
 262         pci_read_config_dword(dev, 0x48, &temp32);
 263         pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));
 264
 265         /* Enable sideband interrupt */
 266         pci_read_config_dword(dev, 0x90, &temp32);
 267         pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
 268 }
 269
 270 static void __devinit hpcd_quirk_uli5288(struct pci_dev *dev)
 271 {
 272         unsigned char c;
 273         unsigned short temp;
 274
 275         if (!machine_is(mpc86xx_hpcd))
 276                 return;
 277
 278         /* Interrupt Disable, Needed when SATA disabled */
 279         pci_read_config_word(dev, PCI_COMMAND, &temp);
 280         temp |= 1<<10;
 281         pci_write_config_word(dev, PCI_COMMAND, temp);
 282
 283         pci_read_config_byte(dev, 0x83, &c);
 284         c |= 0x80;
 285         pci_write_config_byte(dev, 0x83, c);
 286
 287         pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
 288         pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
 289
 290         pci_read_config_byte(dev, 0x83, &c);
 291         c &= 0x7f;
 292         pci_write_config_byte(dev, 0x83, c);
 293 }
 294
 295 /*
 296  * Since 8259PIC was disabled on the board, the IDE device can not
 297  * use the legacy IRQ, we need to let the IDE device work under
 298  * native mode and use the interrupt line like other PCI devices.
 299  * IRQ14 is a sideband interrupt from IDE device to CPU and we use this
 300  * as the interrupt for IDE device.
 301  */
 302 static void __devinit hpcd_quirk_uli5229(struct pci_dev *dev)
 303 {
 304         unsigned char c;
 305
 306         if (!machine_is(mpc86xx_hpcd))
 307                 return;
 308
 309         pci_read_config_byte(dev, 0x4b, &c);
 310         c |= 0x10;
 311         pci_write_config_byte(dev, 0x4b, c);
 312 }
 313
 314 /*
 315  * SATA interrupt pin bug fix
 316  * There's a chip bug for 5288, The interrupt pin should be 2,
 317  * not the read only value 1, So it use INTB#, not INTA# which
 318  * actually used by the IDE device 5229.
 319  * As of this bug, during the PCI initialization, 5288 read the
 320  * irq of IDE device from the device tree, this function fix this
 321  * bug by re-assigning a correct irq to 5288.
 322  *
 323  */
 324 static void __devinit hpcd_final_uli5288(struct pci_dev *dev)
 325 {
 326         struct pci_controller *hose = pci_bus_to_host(dev->bus);
 327         struct device_node *hosenode = hose ? hose->dn : NULL;
 328         struct of_irq oirq;
 329         int virq, pin = 2;
 330         u32 laddr[3];
 331
 332         if (!machine_is(mpc86xx_hpcd))
 333                 return;
 334
 335         if (!hosenode)
 336                 return;
 337
 338         laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8);
 339         laddr[1] = laddr[2] = 0;
 340         of_irq_map_raw(hosenode, &pin, 1, laddr, &oirq);
 341         virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
 342                                      oirq.size);
 343         dev->irq = virq;
 344 }
 345
 346 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, hpcd_quirk_uli1575);
 347 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, hpcd_quirk_uli5288);
 348 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, hpcd_quirk_uli5229);
 349 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, hpcd_final_uli5288);
 350
 351 int uli_exclude_device(struct pci_controller *hose,
 352                         u_char bus, u_char devfn)
 353 {
 354         if (bus == (hose->first_busno + 2)) {
 355                 /* exclude Modem controller */
 356                 if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 1))
 357                         return PCIBIOS_DEVICE_NOT_FOUND;
 358
 359                 /* exclude HD Audio controller */
 360                 if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 2))
 361                         return PCIBIOS_DEVICE_NOT_FOUND;
 362         }
 363
 364         return PCIBIOS_SUCCESSFUL;
 365 }