pcic.c
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- /* $Id: pcic.c,v 1.22.2.1 2002/01/23 14:35:45 davem Exp $
- * pcic.c: Sparc/PCI controller support
- *
- * Copyright (C) 1998 V. Roganov and G. Raiko
- *
- * Code is derived from Ultra/PCI PSYCHO controller support, see that
- * for author info.
- *
- * Support for diverse IIep based platforms by Pete Zaitcev.
- * CP-1200 by Eric Brower.
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/init.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <asm/ebus.h>
- #include <asm/sbus.h> /* for sanity check... */
- #include <asm/swift.h> /* for cache flushing. */
- #include <asm/io.h>
- #include <linux/ctype.h>
- #include <linux/pci.h>
- #include <linux/timex.h>
- #include <linux/interrupt.h>
- #include <asm/irq.h>
- #include <asm/oplib.h>
- #include <asm/pcic.h>
- #include <asm/timer.h>
- #include <asm/uaccess.h>
- #ifndef CONFIG_PCI
- asmlinkage int sys_pciconfig_read(unsigned long bus,
- unsigned long dfn,
- unsigned long off,
- unsigned long len,
- unsigned char *buf)
- {
- return -EINVAL;
- }
- asmlinkage int sys_pciconfig_write(unsigned long bus,
- unsigned long dfn,
- unsigned long off,
- unsigned long len,
- unsigned char *buf)
- {
- return -EINVAL;
- }
- #else
- #ifdef CONFIG_SUN_JSFLASH
- extern int jsflash_init(void);
- #endif
- struct pci_fixup pcibios_fixups[] = {
- { 0 }
- };
- unsigned int pcic_pin_to_irq(unsigned int pin, char *name);
- /*
- * I studied different documents and many live PROMs both from 2.30
- * family and 3.xx versions. I came to the amazing conclusion: there is
- * absolutely no way to route interrupts in IIep systems relying on
- * information which PROM presents. We must hardcode interrupt routing
- * schematics. And this actually sucks. -- zaitcev 1999/05/12
- *
- * To find irq for a device we determine which routing map
- * is in effect or, in other words, on which machine we are running.
- * We use PROM name for this although other techniques may be used
- * in special cases (Gleb reports a PROMless IIep based system).
- * Once we know the map we take device configuration address and
- * find PCIC pin number where INT line goes. Then we may either program
- * preferred irq into the PCIC or supply the preexisting irq to the device.
- */
- struct pcic_ca2irq {
- unsigned char busno; /* PCI bus number */
- unsigned char devfn; /* Configuration address */
- unsigned char pin; /* PCIC external interrupt pin */
- unsigned char irq; /* Preferred IRQ (mappable in PCIC) */
- unsigned int force; /* Enforce preferred IRQ */
- };
- struct pcic_sn2list {
- char *sysname;
- struct pcic_ca2irq *intmap;
- int mapdim;
- };
- /*
- * JavaEngine-1 apparently has different versions.
- *
- * According to communications with Sun folks, for P2 build 501-4628-03:
- * pin 0 - parallel, audio;
- * pin 1 - Ethernet;
- * pin 2 - su;
- * pin 3 - PS/2 kbd and mouse.
- *
- * OEM manual (805-1486):
- * pin 0: Ethernet
- * pin 1: All EBus
- * pin 2: IGA (unused)
- * pin 3: Not connected
- * OEM manual says that 501-4628 & 501-4811 are the same thing,
- * only the latter has NAND flash in place.
- *
- * So far unofficial Sun wins over the OEM manual. Poor OEMs...
- */
- static struct pcic_ca2irq pcic_i_je1a[] = { /* 501-4811-03 */
- { 0, 0x00, 2, 12, 0 }, /* EBus: hogs all */
- { 0, 0x01, 1, 6, 1 }, /* Happy Meal */
- { 0, 0x80, 0, 7, 0 }, /* IGA (unused) */
- };
- /* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */
- static struct pcic_ca2irq pcic_i_jse[] = {
- { 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
- { 0, 0x01, 1, 6, 0 }, /* hme */
- { 0, 0x08, 2, 9, 0 }, /* VGA - we hope not used :) */
- { 0, 0x10, 6, 8, 0 }, /* PCI INTA# in Slot 1 */
- { 0, 0x18, 7, 12, 0 }, /* PCI INTA# in Slot 2, shared w. RTC */
- { 0, 0x38, 4, 9, 0 }, /* All ISA devices. Read 8259. */
- { 0, 0x80, 5, 11, 0 }, /* EIDE */
- /* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
- { 0, 0xA0, 4, 9, 0 }, /* USB */
- /*
- * Some pins belong to non-PCI devices, we hardcode them in drivers.
- * sun4m timers - irq 10, 14
- * PC style RTC - pin 7, irq 4 ?
- * Smart card, Parallel - pin 4 shared with USB, ISA
- * audio - pin 3, irq 5 ?
- */
- };
- /* SPARCengine-6 was the original release name of CP1200.
- * The documentation differs between the two versions
- */
- static struct pcic_ca2irq pcic_i_se6[] = {
- { 0, 0x08, 0, 2, 0 }, /* SCSI */
- { 0, 0x01, 1, 6, 0 }, /* HME */
- { 0, 0x00, 3, 13, 0 }, /* EBus */
- };
- /*
- * Krups (courtesy of Varol Kaptan)
- * No documentation available, but it was easy to guess
- * because it was very similar to Espresso.
- *
- * pin 0 - kbd, mouse, serial;
- * pin 1 - Ethernet;
- * pin 2 - igs (we do not use it);
- * pin 3 - audio;
- * pin 4,5,6 - unused;
- * pin 7 - RTC (from P2 onwards as David B. says).
- */
- static struct pcic_ca2irq pcic_i_jk[] = {
- { 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
- { 0, 0x01, 1, 6, 0 }, /* hme */
- };
- /*
- * Several entries in this list may point to the same routing map
- * as several PROMs may be installed on the same physical board.
- */
- #define SN2L_INIT(name, map)
- { name, map, sizeof(map)/sizeof(struct pcic_ca2irq) }
- static struct pcic_sn2list pcic_known_sysnames[] = {
- SN2L_INIT("SUNW,JavaEngine1", pcic_i_je1a), /* JE1, PROM 2.32 */
- SN2L_INIT("SUNW,JS-E", pcic_i_jse), /* PROLL JavaStation-E */
- SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */
- SN2L_INIT("SUNW,JS-NC", pcic_i_jk), /* PROLL JavaStation-NC */
- SN2L_INIT("SUNW,JSIIep", pcic_i_jk), /* OBP JavaStation-NC */
- { NULL, NULL, 0 }
- };
- /*
- * Only one PCIC per IIep,
- * and since we have no SMP IIep, only one per system.
- */
- static int pcic0_up = 0;
- static struct linux_pcic pcic0;
- unsigned int pcic_regs;
- volatile int pcic_speculative;
- volatile int pcic_trapped;
- static void pci_do_gettimeofday(struct timeval *tv);
- static void pci_do_settimeofday(struct timeval *tv);
- #define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
- static int pcic_read_config_dword(struct pci_dev *dev, int where, u32 *value);
- static int pcic_write_config_dword(struct pci_dev *dev, int where, u32 value);
- static int pcic_read_config_byte(struct pci_dev *dev, int where, u8 *value)
- {
- unsigned int v;
- pcic_read_config_dword(dev, where&~3, &v);
- *value = 0xff & (v >> (8*(where & 3)));
- return PCIBIOS_SUCCESSFUL;
- }
- static int pcic_read_config_word(struct pci_dev *dev, int where, u16 *value)
- {
- unsigned int v;
- if (where&1) return PCIBIOS_BAD_REGISTER_NUMBER;
- pcic_read_config_dword(dev, where&~3, &v);
- *value = 0xffff & (v >> (8*(where & 3)));
- return PCIBIOS_SUCCESSFUL;
- }
- static int pcic_read_config_dword(struct pci_dev *dev, int where, u32 *value)
- {
- unsigned char bus = dev->bus->number;
- unsigned char device_fn = dev->devfn;
- /* unsigned char where; */
- struct linux_pcic *pcic;
- unsigned long flags;
- if (where&3) return PCIBIOS_BAD_REGISTER_NUMBER;
- if (bus != 0) return PCIBIOS_DEVICE_NOT_FOUND;
- pcic = &pcic0;
- save_and_cli(flags);
- #if 0 /* does not fail here */
- pcic_speculative = 1;
- pcic_trapped = 0;
- #endif
- writel(CONFIG_CMD(bus,device_fn,where), pcic->pcic_config_space_addr);
- #if 0 /* does not fail here */
- nop();
- if (pcic_trapped) {
- restore_flags(flags);
- *value = ~0;
- return PCIBIOS_SUCCESSFUL;
- }
- #endif
- pcic_speculative = 2;
- pcic_trapped = 0;
- *value = readl(pcic->pcic_config_space_data + (where&4));
- nop();
- if (pcic_trapped) {
- pcic_speculative = 0;
- restore_flags(flags);
- *value = ~0;
- return PCIBIOS_SUCCESSFUL;
- }
- pcic_speculative = 0;
- restore_flags(flags);
- return PCIBIOS_SUCCESSFUL;
- }
- static int pcic_write_config_byte(struct pci_dev *dev, int where, u8 value)
- {
- unsigned int v;
- pcic_read_config_dword(dev, where&~3, &v);
- v = (v & ~(0xff << (8*(where&3)))) |
- ((0xff&(unsigned)value) << (8*(where&3)));
- return pcic_write_config_dword(dev, where&~3, v);
- }
- static int pcic_write_config_word(struct pci_dev *dev, int where, u16 value)
- {
- unsigned int v;
- if (where&1) return PCIBIOS_BAD_REGISTER_NUMBER;
- pcic_read_config_dword(dev, where&~3, &v);
- v = (v & ~(0xffff << (8*(where&3)))) |
- ((0xffff&(unsigned)value) << (8*(where&3)));
- return pcic_write_config_dword(dev, where&~3, v);
- }
- static int pcic_write_config_dword(struct pci_dev *dev, int where, u32 value)
- {
- unsigned char bus = dev->bus->number;
- unsigned char devfn = dev->devfn;
- struct linux_pcic *pcic;
- unsigned long flags;
- if (where&3) return PCIBIOS_BAD_REGISTER_NUMBER;
- if (bus != 0) return PCIBIOS_DEVICE_NOT_FOUND;
- pcic = &pcic0;
- save_and_cli(flags);
- writel(CONFIG_CMD(bus,devfn,where), pcic->pcic_config_space_addr);
- writel(value, pcic->pcic_config_space_data + (where&4));
- restore_flags(flags);
- return PCIBIOS_SUCCESSFUL;
- }
- static struct pci_ops pcic_ops = {
- pcic_read_config_byte,
- pcic_read_config_word,
- pcic_read_config_dword,
- pcic_write_config_byte,
- pcic_write_config_word,
- pcic_write_config_dword,
- };
- /*
- * On sparc64 pcibios_init() calls pci_controller_probe().
- * We want PCIC probed little ahead so that interrupt controller
- * would be operational.
- */
- int __init pcic_probe(void)
- {
- struct linux_pcic *pcic;
- struct linux_prom_registers regs[PROMREG_MAX];
- struct linux_pbm_info* pbm;
- char namebuf[64];
- int node;
- int err;
- if (pcic0_up) {
- prom_printf("PCIC: called twice!n");
- prom_halt();
- }
- pcic = &pcic0;
- node = prom_getchild (prom_root_node);
- node = prom_searchsiblings (node, "pci");
- if (node == 0)
- return -ENODEV;
- /*
- * Map in PCIC register set, config space, and IO base
- */
- err = prom_getproperty(node, "reg", (char*)regs, sizeof(regs));
- if (err == 0 || err == -1) {
- prom_printf("PCIC: Error, cannot get PCIC registers "
- "from PROM.n");
- prom_halt();
- }
- pcic0_up = 1;
- pcic->pcic_res_regs.name = "pcic_registers";
- pcic->pcic_regs = (unsigned long)
- ioremap(regs[0].phys_addr, regs[0].reg_size);
- if (!pcic->pcic_regs) {
- prom_printf("PCIC: Error, cannot map PCIC registers.n");
- prom_halt();
- }
- pcic->pcic_res_io.name = "pcic_io";
- if ((pcic->pcic_io = (unsigned long)
- ioremap(regs[1].phys_addr, 0x10000)) == 0) {
- prom_printf("PCIC: Error, cannot map PCIC IO Base.n");
- prom_halt();
- }
- pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";
- if ((pcic->pcic_config_space_addr = (unsigned long)
- ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == 0) {
- prom_printf("PCIC: Error, cannot map"
- "PCI Configuration Space Address.n");
- prom_halt();
- }
- /*
- * Docs say three least significant bits in address and data
- * must be the same. Thus, we need adjust size of data.
- */
- pcic->pcic_res_cfg_data.name = "pcic_cfg_data";
- if ((pcic->pcic_config_space_data = (unsigned long)
- ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == 0) {
- prom_printf("PCIC: Error, cannot map"
- "PCI Configuration Space Data.n");
- prom_halt();
- }
- pbm = &pcic->pbm;
- pbm->prom_node = node;
- prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0;
- strcpy(pbm->prom_name, namebuf);
- {
- extern volatile int t_nmi[1];
- extern int pcic_nmi_trap_patch[1];
- t_nmi[0] = pcic_nmi_trap_patch[0];
- t_nmi[1] = pcic_nmi_trap_patch[1];
- t_nmi[2] = pcic_nmi_trap_patch[2];
- t_nmi[3] = pcic_nmi_trap_patch[3];
- swift_flush_dcache();
- pcic_regs = pcic->pcic_regs;
- }
- prom_getstring(prom_root_node, "name", namebuf, 63); namebuf[63] = 0;
- {
- struct pcic_sn2list *p;
- for (p = pcic_known_sysnames; p->sysname != NULL; p++) {
- if (strcmp(namebuf, p->sysname) == 0)
- break;
- }
- pcic->pcic_imap = p->intmap;
- pcic->pcic_imdim = p->mapdim;
- }
- if (pcic->pcic_imap == NULL) {
- /*
- * We do not panic here for the sake of embedded systems.
- */
- printk("PCIC: System %s is unknown, cannot route interruptsn",
- namebuf);
- }
- return 0;
- }
- static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
- {
- struct linux_pbm_info *pbm = &pcic->pbm;
- pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
- #if 0 /* deadwood transplanted from sparc64 */
- pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);
- pci_record_assignments(pbm, pbm->pci_bus);
- pci_assign_unassigned(pbm, pbm->pci_bus);
- pci_fixup_irq(pbm, pbm->pci_bus);
- #endif
- }
- /*
- * Main entry point from the PCI subsystem.
- */
- void __init pcibios_init(void)
- {
- struct linux_pcic *pcic;
- /*
- * PCIC should be initialized at start of the timer.
- * So, here we report the presence of PCIC and do some magic passes.
- */
- if(!pcic0_up)
- return;
- pcic = &pcic0;
- /*
- * Switch off IOTLB translation.
- */
- writeb(PCI_DVMA_CONTROL_IOTLB_DISABLE,
- pcic->pcic_regs+PCI_DVMA_CONTROL);
- /*
- * Increase mapped size for PCI memory space (DMA access).
- * Should be done in that order (size first, address second).
- * Why we couldn't set up 4GB and forget about it? XXX
- */
- writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);
- writel(0+PCI_BASE_ADDRESS_SPACE_MEMORY,
- pcic->pcic_regs+PCI_BASE_ADDRESS_0);
- pcic_pbm_scan_bus(pcic);
- ebus_init();
- #ifdef CONFIG_SUN_JSFLASH
- jsflash_init();
- #endif
- }
- int pcic_present(void)
- {
- return pcic0_up;
- }
- static int __init pdev_to_pnode(struct linux_pbm_info *pbm,
- struct pci_dev *pdev)
- {
- struct linux_prom_pci_registers regs[PROMREG_MAX];
- int err;
- int node = prom_getchild(pbm->prom_node);
- while(node) {
- err = prom_getproperty(node, "reg",
- (char *)®s[0], sizeof(regs));
- if(err != 0 && err != -1) {
- unsigned long devfn = (regs[0].which_io >> 8) & 0xff;
- if(devfn == pdev->devfn)
- return node;
- }
- node = prom_getsibling(node);
- }
- return 0;
- }
- static inline struct pcidev_cookie *pci_devcookie_alloc(void)
- {
- return kmalloc(sizeof(struct pcidev_cookie), GFP_ATOMIC);
- }
- static void pcic_map_pci_device(struct linux_pcic *pcic,
- struct pci_dev *dev, int node)
- {
- char namebuf[64];
- unsigned long address;
- unsigned long flags;
- int j;
- if (node == 0 || node == -1) {
- strcpy(namebuf, "???");
- } else {
- prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0;
- }
- for (j = 0; j < 6; j++) {
- address = dev->resource[j].start;
- if (address == 0) break; /* are sequential */
- flags = dev->resource[j].flags;
- if ((flags & IORESOURCE_IO) != 0) {
- if (address < 0x10000) {
- /*
- * A device responds to I/O cycles on PCI.
- * We generate these cycles with memory
- * access into the fixed map (phys 0x30000000).
- *
- * Since a device driver does not want to
- * do ioremap() before accessing PC-style I/O,
- * we supply virtual, ready to access address.
- *
- * Ebus devices do not come here even if
- * CheerIO makes a similar conversion.
- * See ebus.c for details.
- *
- * Note that check_region()/request_region()
- * work for these devices.
- *
- * XXX Neat trick, but it's a *bad* idea
- * to shit into regions like that.
- * What if we want to allocate one more
- * PCI base address...
- */
- dev->resource[j].start =
- pcic->pcic_io + address;
- dev->resource[j].end = 1; /* XXX */
- dev->resource[j].flags =
- (flags & ~IORESOURCE_IO) | IORESOURCE_MEM;
- } else {
- /*
- * OOPS... PCI Spec allows this. Sun does
- * not have any devices getting above 64K
- * so it must be user with a weird I/O
- * board in a PCI slot. We must remap it
- * under 64K but it is not done yet. XXX
- */
- printk("PCIC: Skipping I/O space at 0x%lx,"
- "this will Oops if a driver attaches;"
- "device '%s' at %02x:%02x)n", address,
- namebuf, dev->bus->number, dev->devfn);
- }
- }
- }
- }
- static void
- pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
- {
- struct pcic_ca2irq *p;
- int i, ivec;
- char namebuf[64];
- if (node == 0 || node == -1) {
- strcpy(namebuf, "???");
- } else {
- prom_getstring(node, "name", namebuf, sizeof(namebuf));
- }
- if ((p = pcic->pcic_imap) == 0) {
- dev->irq = 0;
- return;
- }
- for (i = 0; i < pcic->pcic_imdim; i++) {
- if (p->busno == dev->bus->number && p->devfn == dev->devfn)
- break;
- p++;
- }
- if (i >= pcic->pcic_imdim) {
- printk("PCIC: device %s devfn %02x:%02x not found in %dn",
- namebuf, dev->bus->number, dev->devfn, pcic->pcic_imdim);
- dev->irq = 0;
- return;
- }
- i = p->pin;
- if (i >= 0 && i < 4) {
- ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
- dev->irq = ivec >> (i << 2) & 0xF;
- } else if (i >= 4 && i < 8) {
- ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
- dev->irq = ivec >> ((i-4) << 2) & 0xF;
- } else { /* Corrupted map */
- printk("PCIC: BAD PIN %dn", i); for (;;) {}
- }
- /* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %xn", namebuf, i, ivec, dev->irq); */
- /*
- * dev->irq=0 means PROM did not bother to program the upper
- * half of PCIC. This happens on JS-E with PROM 3.11, for instance.
- */
- if (dev->irq == 0 || p->force) {
- if (p->irq == 0 || p->irq >= 15) { /* Corrupted map */
- printk("PCIC: BAD IRQ %dn", p->irq); for (;;) {}
- }
- printk("PCIC: setting irq %d at pin %d for device %02x:%02xn",
- p->irq, p->pin, dev->bus->number, dev->devfn);
- dev->irq = p->irq;
- i = p->pin;
- if (i >= 4) {
- ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
- ivec &= ~(0xF << ((i - 4) << 2));
- ivec |= p->irq << ((i - 4) << 2);
- writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_HI);
- } else {
- ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
- ivec &= ~(0xF << (i << 2));
- ivec |= p->irq << (i << 2);
- writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);
- }
- }
- return;
- }
- /*
- * Normally called from {do_}pci_scan_bus...
- */
- void __init pcibios_fixup_bus(struct pci_bus *bus)
- {
- struct list_head *walk;
- int i, has_io, has_mem;
- unsigned short cmd;
- struct linux_pcic *pcic;
- /* struct linux_pbm_info* pbm = &pcic->pbm; */
- int node;
- struct pcidev_cookie *pcp;
- if (!pcic0_up) {
- printk("pcibios_fixup_bus: no PCICn");
- return;
- }
- pcic = &pcic0;
- /*
- * Next crud is an equivalent of pbm = pcic_bus_to_pbm(bus);
- */
- if (bus->number != 0) {
- printk("pcibios_fixup_bus: nonzero bus 0x%xn", bus->number);
- return;
- }
- walk = &bus->devices;
- for (walk = walk->next; walk != &bus->devices; walk = walk->next) {
- struct pci_dev *dev = pci_dev_b(walk);
- /*
- * Comment from i386 branch:
- * There are buggy BIOSes that forget to enable I/O and memory
- * access to PCI devices. We try to fix this, but we need to
- * be sure that the BIOS didn't forget to assign an address
- * to the device. [mj]
- * OBP is a case of such BIOS :-)
- */
- has_io = has_mem = 0;
- for(i=0; i<6; i++) {
- unsigned long f = dev->resource[i].flags;
- if (f & IORESOURCE_IO) {
- has_io = 1;
- } else if (f & IORESOURCE_MEM)
- has_mem = 1;
- }
- pcic_read_config_word(dev, PCI_COMMAND, &cmd);
- if (has_io && !(cmd & PCI_COMMAND_IO)) {
- printk("PCIC: Enabling I/O for device %02x:%02xn",
- dev->bus->number, dev->devfn);
- cmd |= PCI_COMMAND_IO;
- pcic_write_config_word(dev, PCI_COMMAND, cmd);
- }
- if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) {
- printk("PCIC: Enabling memory for device %02x:%02xn",
- dev->bus->number, dev->devfn);
- cmd |= PCI_COMMAND_MEMORY;
- pcic_write_config_word(dev, PCI_COMMAND, cmd);
- }
- node = pdev_to_pnode(&pcic->pbm, dev);
- if(node == 0)
- node = -1;
- /* cookies */
- pcp = pci_devcookie_alloc();
- pcp->pbm = &pcic->pbm;
- pcp->prom_node = node;
- dev->sysdata = pcp;
- /* fixing I/O to look like memory */
- if ((dev->class>>16) != PCI_BASE_CLASS_BRIDGE)
- pcic_map_pci_device(pcic, dev, node);
- pcic_fill_irq(pcic, dev, node);
- }
- }
- /*
- * pcic_pin_to_irq() is exported to ebus.c.
- */
- unsigned int
- pcic_pin_to_irq(unsigned int pin, char *name)
- {
- struct linux_pcic *pcic = &pcic0;
- unsigned int irq;
- unsigned int ivec;
- if (pin < 4) {
- ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
- irq = ivec >> (pin << 2) & 0xF;
- } else if (pin < 8) {
- ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI);
- irq = ivec >> ((pin-4) << 2) & 0xF;
- } else { /* Corrupted map */
- printk("PCIC: BAD PIN %d FOR %sn", pin, name);
- for (;;) {} /* XXX Cannot panic properly in case of PROLL */
- }
- /* P3 */ /* printk("PCIC: dev %s pin %d ivec 0x%x irq %xn", name, pin, ivec, irq); */
- return irq;
- }
- /* Makes compiler happy */
- static volatile int pcic_timer_dummy;
- static void pcic_clear_clock_irq(void)
- {
- pcic_timer_dummy = readl(pcic0.pcic_regs+PCI_SYS_LIMIT);
- }
- static void pcic_timer_handler (int irq, void *h, struct pt_regs *regs)
- {
- pcic_clear_clock_irq();
- do_timer(regs);
- }
- #define USECS_PER_JIFFY 10000 /* We have 100HZ "standard" timer for sparc */
- #define TICK_TIMER_LIMIT ((100*1000000/4)/100)
- void __init pci_time_init(void)
- {
- struct linux_pcic *pcic = &pcic0;
- unsigned long v;
- int timer_irq, irq;
- /* A hack until do_gettimeofday prototype is moved to arch specific headers
- and btfixupped. Patch do_gettimeofday with ba pci_do_gettimeofday; nop */
- ((unsigned int *)do_gettimeofday)[0] =
- 0x10800000 | ((((unsigned long)pci_do_gettimeofday -
- (unsigned long)do_gettimeofday) >> 2) & 0x003fffff);
- ((unsigned int *)do_gettimeofday)[1] = 0x01000000;
- BTFIXUPSET_CALL(bus_do_settimeofday, pci_do_settimeofday, BTFIXUPCALL_NORM);
- btfixup();
- writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT);
- /* PROM should set appropriate irq */
- v = readb(pcic->pcic_regs+PCI_COUNTER_IRQ);
- timer_irq = PCI_COUNTER_IRQ_SYS(v);
- writel (PCI_COUNTER_IRQ_SET(timer_irq, 0),
- pcic->pcic_regs+PCI_COUNTER_IRQ);
- irq = request_irq(timer_irq, pcic_timer_handler,
- (SA_INTERRUPT | SA_STATIC_ALLOC), "timer", NULL);
- if (irq) {
- prom_printf("time_init: unable to attach IRQ%dn", timer_irq);
- prom_halt();
- }
- __sti();
- }
- static __inline__ unsigned long do_gettimeoffset(void)
- {
- struct tasklet_struct *t;
- unsigned long offset = 0;
- /*
- * We devide all to 100
- * to have microsecond resolution and to avoid overflow
- */
- unsigned long count =
- readl(pcic0.pcic_regs+PCI_SYS_COUNTER) & ~PCI_SYS_COUNTER_OVERFLOW;
- count = ((count/100)*USECS_PER_JIFFY) / (TICK_TIMER_LIMIT/100);
- t = &bh_task_vec[TIMER_BH];
- if (test_bit(TASKLET_STATE_SCHED, &t->state))
- offset = 1000000;
- return offset + count;
- }
- extern volatile unsigned long wall_jiffies;
- static void pci_do_gettimeofday(struct timeval *tv)
- {
- unsigned long flags;
- save_and_cli(flags);
- *tv = xtime;
- tv->tv_usec += do_gettimeoffset();
- /*
- * xtime is atomically updated in timer_bh. The difference
- * between jiffies and wall_jiffies is nonzero if the timer
- * bottom half hasnt executed yet.
- */
- if ((jiffies - wall_jiffies) != 0)
- tv->tv_usec += USECS_PER_JIFFY;
- restore_flags(flags);
- if (tv->tv_usec >= 1000000) {
- tv->tv_usec -= 1000000;
- tv->tv_sec++;
- }
- }
- static void pci_do_settimeofday(struct timeval *tv)
- {
- cli();
- tv->tv_usec -= do_gettimeoffset();
- if(tv->tv_usec < 0) {
- tv->tv_usec += 1000000;
- tv->tv_sec--;
- }
- xtime = *tv;
- time_adjust = 0; /* stop active adjtime() */
- time_status |= STA_UNSYNC;
- time_maxerror = NTP_PHASE_LIMIT;
- time_esterror = NTP_PHASE_LIMIT;
- sti();
- }
- #if 0
- static void watchdog_reset() {
- writeb(0, pcic->pcic_regs+PCI_SYS_STATUS);
- }
- #endif
- /*
- * Other archs parse arguments here.
- */
- char * __init pcibios_setup(char *str)
- {
- return str;
- }
- /*
- */
- void pcibios_update_resource(struct pci_dev *pdev, struct resource *res1,
- struct resource *res2, int index)
- {
- }
- void pcibios_align_resource(void *data, struct resource *res, unsigned long size)
- {
- }
- int pcibios_enable_device(struct pci_dev *pdev)
- {
- return 0;
- }
- /*
- * NMI
- */
- void pcic_nmi(unsigned int pend, struct pt_regs *regs)
- {
- pend = flip_dword(pend);
- if (!pcic_speculative || (pend & PCI_SYS_INT_PENDING_PIO) == 0) {
- /*
- * XXX On CP-1200 PCI #SERR may happen, we do not know
- * what to do about it yet.
- */
- printk("Aiee, NMI pend 0x%x pc 0x%x spec %d, hangingn",
- pend, (int)regs->pc, pcic_speculative);
- for (;;) { }
- }
- pcic_speculative = 0;
- pcic_trapped = 1;
- regs->pc = regs->npc;
- regs->npc += 4;
- }
- static inline unsigned long get_irqmask(int irq_nr)
- {
- return 1 << irq_nr;
- }
- static inline char *pcic_irq_itoa(unsigned int irq)
- {
- static char buff[16];
- sprintf(buff, "%d", irq);
- return buff;
- }
- static void pcic_disable_irq(unsigned int irq_nr)
- {
- unsigned long mask, flags;
- mask = get_irqmask(irq_nr);
- save_and_cli(flags);
- writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
- restore_flags(flags);
- }
- static void pcic_enable_irq(unsigned int irq_nr)
- {
- unsigned long mask, flags;
- mask = get_irqmask(irq_nr);
- save_and_cli(flags);
- writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
- restore_flags(flags);
- }
- static void pcic_clear_profile_irq(int cpu)
- {
- printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
- }
- static void pcic_load_profile_irq(int cpu, unsigned int limit)
- {
- printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
- }
- /* We assume the caller is local cli()'d when these are called, or else
- * very bizarre behavior will result.
- */
- static void pcic_disable_pil_irq(unsigned int pil)
- {
- writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
- }
- static void pcic_enable_pil_irq(unsigned int pil)
- {
- writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
- }
- void __init sun4m_pci_init_IRQ(void)
- {
- BTFIXUPSET_CALL(enable_irq, pcic_enable_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(disable_irq, pcic_disable_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(enable_pil_irq, pcic_enable_pil_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(disable_pil_irq, pcic_disable_pil_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(clear_clock_irq, pcic_clear_clock_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(clear_profile_irq, pcic_clear_profile_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(load_profile_irq, pcic_load_profile_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(__irq_itoa, pcic_irq_itoa, BTFIXUPCALL_NORM);
- }
- int pcibios_assign_resource(struct pci_dev *pdev, int resource)
- {
- return -ENXIO;
- }
- /*
- * This probably belongs here rather than ioport.c because
- * we do not want this crud linked into SBus kernels.
- * Also, think for a moment about likes of floppy.c that
- * include architecture specific parts. They may want to redefine ins/outs.
- *
- * We do not use horroble macroses here because we want to
- * advance pointer by sizeof(size).
- */
- void outsb(unsigned long addr, const void *src, unsigned long count) {
- while (count) {
- count -= 1;
- writeb(*(const char *)src, addr);
- src += 1;
- addr += 1;
- }
- }
- void outsw(unsigned long addr, const void *src, unsigned long count) {
- while (count) {
- count -= 2;
- writew(*(const short *)src, addr);
- src += 2;
- addr += 2;
- }
- }
- void outsl(unsigned long addr, const void *src, unsigned long count) {
- while (count) {
- count -= 4;
- writel(*(const long *)src, addr);
- src += 4;
- addr += 4;
- }
- }
- void insb(unsigned long addr, void *dst, unsigned long count) {
- while (count) {
- count -= 1;
- *(unsigned char *)dst = readb(addr);
- dst += 1;
- addr += 1;
- }
- }
- void insw(unsigned long addr, void *dst, unsigned long count) {
- while (count) {
- count -= 2;
- *(unsigned short *)dst = readw(addr);
- dst += 2;
- addr += 2;
- }
- }
- void insl(unsigned long addr, void *dst, unsigned long count) {
- while (count) {
- count -= 4;
- /*
- * XXX I am sure we are in for an unaligned trap here.
- */
- *(unsigned long *)dst = readl(addr);
- dst += 4;
- addr += 4;
- }
- }
- #endif