1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1042 lines
27 KiB
C
1042 lines
27 KiB
C
/*
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* pcic.c: MicroSPARC-IIep PCI controller support
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*
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* Copyright (C) 1998 V. Roganov and G. Raiko
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*
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* Code is derived from Ultra/PCI PSYCHO controller support, see that
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* for author info.
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*
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* Support for diverse IIep based platforms by Pete Zaitcev.
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* CP-1200 by Eric Brower.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <asm/ebus.h>
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#include <asm/sbus.h> /* for sanity check... */
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#include <asm/swift.h> /* for cache flushing. */
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#include <asm/io.h>
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#include <linux/ctype.h>
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#include <linux/pci.h>
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#include <linux/time.h>
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#include <linux/timex.h>
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#include <linux/interrupt.h>
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#include <asm/irq.h>
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#include <asm/oplib.h>
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#include <asm/pcic.h>
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#include <asm/timer.h>
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#include <asm/uaccess.h>
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unsigned int pcic_pin_to_irq(unsigned int pin, char *name);
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/*
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* I studied different documents and many live PROMs both from 2.30
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* family and 3.xx versions. I came to the amazing conclusion: there is
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* absolutely no way to route interrupts in IIep systems relying on
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* information which PROM presents. We must hardcode interrupt routing
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* schematics. And this actually sucks. -- zaitcev 1999/05/12
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*
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* To find irq for a device we determine which routing map
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* is in effect or, in other words, on which machine we are running.
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* We use PROM name for this although other techniques may be used
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* in special cases (Gleb reports a PROMless IIep based system).
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* Once we know the map we take device configuration address and
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* find PCIC pin number where INT line goes. Then we may either program
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* preferred irq into the PCIC or supply the preexisting irq to the device.
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*/
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struct pcic_ca2irq {
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unsigned char busno; /* PCI bus number */
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unsigned char devfn; /* Configuration address */
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unsigned char pin; /* PCIC external interrupt pin */
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unsigned char irq; /* Preferred IRQ (mappable in PCIC) */
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unsigned int force; /* Enforce preferred IRQ */
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};
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struct pcic_sn2list {
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char *sysname;
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struct pcic_ca2irq *intmap;
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int mapdim;
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};
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/*
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* JavaEngine-1 apparently has different versions.
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*
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* According to communications with Sun folks, for P2 build 501-4628-03:
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* pin 0 - parallel, audio;
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* pin 1 - Ethernet;
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* pin 2 - su;
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* pin 3 - PS/2 kbd and mouse.
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*
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* OEM manual (805-1486):
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* pin 0: Ethernet
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* pin 1: All EBus
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* pin 2: IGA (unused)
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* pin 3: Not connected
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* OEM manual says that 501-4628 & 501-4811 are the same thing,
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* only the latter has NAND flash in place.
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*
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* So far unofficial Sun wins over the OEM manual. Poor OEMs...
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*/
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static struct pcic_ca2irq pcic_i_je1a[] = { /* 501-4811-03 */
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{ 0, 0x00, 2, 12, 0 }, /* EBus: hogs all */
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{ 0, 0x01, 1, 6, 1 }, /* Happy Meal */
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{ 0, 0x80, 0, 7, 0 }, /* IGA (unused) */
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};
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/* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */
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static struct pcic_ca2irq pcic_i_jse[] = {
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{ 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
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{ 0, 0x01, 1, 6, 0 }, /* hme */
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{ 0, 0x08, 2, 9, 0 }, /* VGA - we hope not used :) */
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{ 0, 0x10, 6, 8, 0 }, /* PCI INTA# in Slot 1 */
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{ 0, 0x18, 7, 12, 0 }, /* PCI INTA# in Slot 2, shared w. RTC */
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{ 0, 0x38, 4, 9, 0 }, /* All ISA devices. Read 8259. */
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{ 0, 0x80, 5, 11, 0 }, /* EIDE */
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/* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */
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{ 0, 0xA0, 4, 9, 0 }, /* USB */
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/*
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* Some pins belong to non-PCI devices, we hardcode them in drivers.
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* sun4m timers - irq 10, 14
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* PC style RTC - pin 7, irq 4 ?
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* Smart card, Parallel - pin 4 shared with USB, ISA
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* audio - pin 3, irq 5 ?
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*/
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};
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/* SPARCengine-6 was the original release name of CP1200.
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* The documentation differs between the two versions
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*/
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static struct pcic_ca2irq pcic_i_se6[] = {
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{ 0, 0x08, 0, 2, 0 }, /* SCSI */
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{ 0, 0x01, 1, 6, 0 }, /* HME */
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{ 0, 0x00, 3, 13, 0 }, /* EBus */
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};
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/*
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* Krups (courtesy of Varol Kaptan)
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* No documentation available, but it was easy to guess
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* because it was very similar to Espresso.
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*
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* pin 0 - kbd, mouse, serial;
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* pin 1 - Ethernet;
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* pin 2 - igs (we do not use it);
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* pin 3 - audio;
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* pin 4,5,6 - unused;
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* pin 7 - RTC (from P2 onwards as David B. says).
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*/
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static struct pcic_ca2irq pcic_i_jk[] = {
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{ 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */
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{ 0, 0x01, 1, 6, 0 }, /* hme */
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};
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/*
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* Several entries in this list may point to the same routing map
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* as several PROMs may be installed on the same physical board.
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*/
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#define SN2L_INIT(name, map) \
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{ name, map, sizeof(map)/sizeof(struct pcic_ca2irq) }
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static struct pcic_sn2list pcic_known_sysnames[] = {
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SN2L_INIT("SUNW,JavaEngine1", pcic_i_je1a), /* JE1, PROM 2.32 */
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SN2L_INIT("SUNW,JS-E", pcic_i_jse), /* PROLL JavaStation-E */
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SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */
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SN2L_INIT("SUNW,JS-NC", pcic_i_jk), /* PROLL JavaStation-NC */
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SN2L_INIT("SUNW,JSIIep", pcic_i_jk), /* OBP JavaStation-NC */
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{ NULL, NULL, 0 }
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};
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/*
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* Only one PCIC per IIep,
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* and since we have no SMP IIep, only one per system.
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*/
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static int pcic0_up;
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static struct linux_pcic pcic0;
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void * __iomem pcic_regs;
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volatile int pcic_speculative;
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volatile int pcic_trapped;
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static void pci_do_gettimeofday(struct timeval *tv);
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static int pci_do_settimeofday(struct timespec *tv);
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#define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
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static int pcic_read_config_dword(unsigned int busno, unsigned int devfn,
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int where, u32 *value)
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{
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struct linux_pcic *pcic;
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unsigned long flags;
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pcic = &pcic0;
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local_irq_save(flags);
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#if 0 /* does not fail here */
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pcic_speculative = 1;
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pcic_trapped = 0;
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#endif
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writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);
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#if 0 /* does not fail here */
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nop();
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if (pcic_trapped) {
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local_irq_restore(flags);
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*value = ~0;
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return 0;
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}
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#endif
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pcic_speculative = 2;
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pcic_trapped = 0;
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*value = readl(pcic->pcic_config_space_data + (where&4));
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nop();
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if (pcic_trapped) {
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pcic_speculative = 0;
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local_irq_restore(flags);
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*value = ~0;
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return 0;
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}
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pcic_speculative = 0;
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local_irq_restore(flags);
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return 0;
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}
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static int pcic_read_config(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 *val)
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{
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unsigned int v;
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if (bus->number != 0) return -EINVAL;
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switch (size) {
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case 1:
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pcic_read_config_dword(bus->number, devfn, where&~3, &v);
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*val = 0xff & (v >> (8*(where & 3)));
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return 0;
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case 2:
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if (where&1) return -EINVAL;
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pcic_read_config_dword(bus->number, devfn, where&~3, &v);
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*val = 0xffff & (v >> (8*(where & 3)));
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return 0;
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case 4:
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if (where&3) return -EINVAL;
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pcic_read_config_dword(bus->number, devfn, where&~3, val);
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return 0;
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}
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return -EINVAL;
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}
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static int pcic_write_config_dword(unsigned int busno, unsigned int devfn,
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int where, u32 value)
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{
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struct linux_pcic *pcic;
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unsigned long flags;
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pcic = &pcic0;
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local_irq_save(flags);
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writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr);
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writel(value, pcic->pcic_config_space_data + (where&4));
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local_irq_restore(flags);
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return 0;
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}
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static int pcic_write_config(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 val)
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{
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unsigned int v;
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if (bus->number != 0) return -EINVAL;
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switch (size) {
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case 1:
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pcic_read_config_dword(bus->number, devfn, where&~3, &v);
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v = (v & ~(0xff << (8*(where&3)))) |
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((0xff&val) << (8*(where&3)));
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return pcic_write_config_dword(bus->number, devfn, where&~3, v);
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case 2:
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if (where&1) return -EINVAL;
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pcic_read_config_dword(bus->number, devfn, where&~3, &v);
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v = (v & ~(0xffff << (8*(where&3)))) |
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((0xffff&val) << (8*(where&3)));
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return pcic_write_config_dword(bus->number, devfn, where&~3, v);
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case 4:
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if (where&3) return -EINVAL;
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return pcic_write_config_dword(bus->number, devfn, where, val);
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}
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return -EINVAL;
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}
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static struct pci_ops pcic_ops = {
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.read = pcic_read_config,
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.write = pcic_write_config,
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};
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/*
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* On sparc64 pcibios_init() calls pci_controller_probe().
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* We want PCIC probed little ahead so that interrupt controller
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* would be operational.
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*/
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int __init pcic_probe(void)
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{
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struct linux_pcic *pcic;
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struct linux_prom_registers regs[PROMREG_MAX];
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struct linux_pbm_info* pbm;
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char namebuf[64];
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int node;
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int err;
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if (pcic0_up) {
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prom_printf("PCIC: called twice!\n");
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prom_halt();
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}
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pcic = &pcic0;
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node = prom_getchild (prom_root_node);
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node = prom_searchsiblings (node, "pci");
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if (node == 0)
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return -ENODEV;
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/*
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* Map in PCIC register set, config space, and IO base
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*/
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err = prom_getproperty(node, "reg", (char*)regs, sizeof(regs));
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if (err == 0 || err == -1) {
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prom_printf("PCIC: Error, cannot get PCIC registers "
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"from PROM.\n");
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prom_halt();
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}
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pcic0_up = 1;
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pcic->pcic_res_regs.name = "pcic_registers";
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pcic->pcic_regs = ioremap(regs[0].phys_addr, regs[0].reg_size);
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if (!pcic->pcic_regs) {
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prom_printf("PCIC: Error, cannot map PCIC registers.\n");
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prom_halt();
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}
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pcic->pcic_res_io.name = "pcic_io";
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if ((pcic->pcic_io = (unsigned long)
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ioremap(regs[1].phys_addr, 0x10000)) == 0) {
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prom_printf("PCIC: Error, cannot map PCIC IO Base.\n");
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prom_halt();
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}
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pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";
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if ((pcic->pcic_config_space_addr =
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ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == 0) {
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prom_printf("PCIC: Error, cannot map"
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"PCI Configuration Space Address.\n");
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prom_halt();
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}
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/*
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* Docs say three least significant bits in address and data
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* must be the same. Thus, we need adjust size of data.
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*/
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pcic->pcic_res_cfg_data.name = "pcic_cfg_data";
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if ((pcic->pcic_config_space_data =
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ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == 0) {
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prom_printf("PCIC: Error, cannot map"
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"PCI Configuration Space Data.\n");
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prom_halt();
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}
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pbm = &pcic->pbm;
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pbm->prom_node = node;
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prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0;
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strcpy(pbm->prom_name, namebuf);
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{
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extern volatile int t_nmi[1];
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extern int pcic_nmi_trap_patch[1];
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t_nmi[0] = pcic_nmi_trap_patch[0];
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t_nmi[1] = pcic_nmi_trap_patch[1];
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t_nmi[2] = pcic_nmi_trap_patch[2];
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t_nmi[3] = pcic_nmi_trap_patch[3];
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swift_flush_dcache();
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pcic_regs = pcic->pcic_regs;
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}
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prom_getstring(prom_root_node, "name", namebuf, 63); namebuf[63] = 0;
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{
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struct pcic_sn2list *p;
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for (p = pcic_known_sysnames; p->sysname != NULL; p++) {
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if (strcmp(namebuf, p->sysname) == 0)
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break;
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}
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pcic->pcic_imap = p->intmap;
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pcic->pcic_imdim = p->mapdim;
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}
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if (pcic->pcic_imap == NULL) {
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/*
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* We do not panic here for the sake of embedded systems.
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*/
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printk("PCIC: System %s is unknown, cannot route interrupts\n",
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namebuf);
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}
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return 0;
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}
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static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
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{
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struct linux_pbm_info *pbm = &pcic->pbm;
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pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
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#if 0 /* deadwood transplanted from sparc64 */
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pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node);
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pci_record_assignments(pbm, pbm->pci_bus);
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pci_assign_unassigned(pbm, pbm->pci_bus);
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pci_fixup_irq(pbm, pbm->pci_bus);
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#endif
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}
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/*
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* Main entry point from the PCI subsystem.
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*/
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static int __init pcic_init(void)
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{
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struct linux_pcic *pcic;
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/*
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* PCIC should be initialized at start of the timer.
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* So, here we report the presence of PCIC and do some magic passes.
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*/
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if(!pcic0_up)
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return 0;
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pcic = &pcic0;
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/*
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* Switch off IOTLB translation.
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*/
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writeb(PCI_DVMA_CONTROL_IOTLB_DISABLE,
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pcic->pcic_regs+PCI_DVMA_CONTROL);
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/*
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* Increase mapped size for PCI memory space (DMA access).
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* Should be done in that order (size first, address second).
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* Why we couldn't set up 4GB and forget about it? XXX
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*/
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writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0);
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writel(0+PCI_BASE_ADDRESS_SPACE_MEMORY,
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pcic->pcic_regs+PCI_BASE_ADDRESS_0);
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pcic_pbm_scan_bus(pcic);
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ebus_init();
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return 0;
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}
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int pcic_present(void)
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{
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return pcic0_up;
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}
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static int __init pdev_to_pnode(struct linux_pbm_info *pbm,
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struct pci_dev *pdev)
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{
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struct linux_prom_pci_registers regs[PROMREG_MAX];
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int err;
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int node = prom_getchild(pbm->prom_node);
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while(node) {
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err = prom_getproperty(node, "reg",
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(char *)®s[0], sizeof(regs));
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if(err != 0 && err != -1) {
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unsigned long devfn = (regs[0].which_io >> 8) & 0xff;
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if(devfn == pdev->devfn)
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return node;
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}
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node = prom_getsibling(node);
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}
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return 0;
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}
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static inline struct pcidev_cookie *pci_devcookie_alloc(void)
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{
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return kmalloc(sizeof(struct pcidev_cookie), GFP_ATOMIC);
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}
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static void pcic_map_pci_device(struct linux_pcic *pcic,
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struct pci_dev *dev, int node)
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{
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char namebuf[64];
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unsigned long address;
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unsigned long flags;
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int j;
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if (node == 0 || node == -1) {
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strcpy(namebuf, "???");
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} 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 %d\n",
|
|
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 %d\n", i); for (;;) {}
|
|
}
|
|
/* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", 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 %d\n", p->irq); for (;;) {}
|
|
}
|
|
printk("PCIC: setting irq %d at pin %d for device %02x:%02x\n",
|
|
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 pci_dev *dev;
|
|
int i, has_io, has_mem;
|
|
unsigned int 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 PCIC\n");
|
|
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%x\n", bus->number);
|
|
return;
|
|
}
|
|
|
|
list_for_each_entry(dev, &bus->devices, bus_list) {
|
|
|
|
/*
|
|
* 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(dev->bus, dev->devfn, PCI_COMMAND, 2, &cmd);
|
|
if (has_io && !(cmd & PCI_COMMAND_IO)) {
|
|
printk("PCIC: Enabling I/O for device %02x:%02x\n",
|
|
dev->bus->number, dev->devfn);
|
|
cmd |= PCI_COMMAND_IO;
|
|
pcic_write_config(dev->bus, dev->devfn,
|
|
PCI_COMMAND, 2, cmd);
|
|
}
|
|
if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) {
|
|
printk("PCIC: Enabling memory for device %02x:%02x\n",
|
|
dev->bus->number, dev->devfn);
|
|
cmd |= PCI_COMMAND_MEMORY;
|
|
pcic_write_config(dev->bus, dev->devfn,
|
|
PCI_COMMAND, 2, 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 %s\n", pin, name);
|
|
for (;;) {} /* XXX Cannot panic properly in case of PROLL */
|
|
}
|
|
/* P3 */ /* printk("PCIC: dev %s pin %d ivec 0x%x irq %x\n", 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 irqreturn_t pcic_timer_handler (int irq, void *h, struct pt_regs *regs)
|
|
{
|
|
write_seqlock(&xtime_lock); /* Dummy, to show that we remember */
|
|
pcic_clear_clock_irq();
|
|
do_timer(regs);
|
|
#ifndef CONFIG_SMP
|
|
update_process_times(user_mode(regs));
|
|
#endif
|
|
write_sequnlock(&xtime_lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
#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%d\n", timer_irq);
|
|
prom_halt();
|
|
}
|
|
local_irq_enable();
|
|
}
|
|
|
|
static __inline__ unsigned long do_gettimeoffset(void)
|
|
{
|
|
/*
|
|
* 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);
|
|
return count;
|
|
}
|
|
|
|
extern unsigned long wall_jiffies;
|
|
|
|
static void pci_do_gettimeofday(struct timeval *tv)
|
|
{
|
|
unsigned long flags;
|
|
unsigned long seq;
|
|
unsigned long usec, sec;
|
|
unsigned long max_ntp_tick = tick_usec - tickadj;
|
|
|
|
do {
|
|
unsigned long lost;
|
|
|
|
seq = read_seqbegin_irqsave(&xtime_lock, flags);
|
|
usec = do_gettimeoffset();
|
|
lost = jiffies - wall_jiffies;
|
|
|
|
/*
|
|
* If time_adjust is negative then NTP is slowing the clock
|
|
* so make sure not to go into next possible interval.
|
|
* Better to lose some accuracy than have time go backwards..
|
|
*/
|
|
if (unlikely(time_adjust < 0)) {
|
|
usec = min(usec, max_ntp_tick);
|
|
|
|
if (lost)
|
|
usec += lost * max_ntp_tick;
|
|
}
|
|
else if (unlikely(lost))
|
|
usec += lost * tick_usec;
|
|
|
|
sec = xtime.tv_sec;
|
|
usec += (xtime.tv_nsec / 1000);
|
|
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
|
|
|
|
while (usec >= 1000000) {
|
|
usec -= 1000000;
|
|
sec++;
|
|
}
|
|
|
|
tv->tv_sec = sec;
|
|
tv->tv_usec = usec;
|
|
}
|
|
|
|
static int pci_do_settimeofday(struct timespec *tv)
|
|
{
|
|
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* This is revolting. We need to set "xtime" correctly. However, the
|
|
* value in this location is the value at the most recent update of
|
|
* wall time. Discover what correction gettimeofday() would have
|
|
* made, and then undo it!
|
|
*/
|
|
tv->tv_nsec -= 1000 * (do_gettimeoffset() +
|
|
(jiffies - wall_jiffies) * (USEC_PER_SEC / HZ));
|
|
while (tv->tv_nsec < 0) {
|
|
tv->tv_nsec += NSEC_PER_SEC;
|
|
tv->tv_sec--;
|
|
}
|
|
|
|
wall_to_monotonic.tv_sec += xtime.tv_sec - tv->tv_sec;
|
|
wall_to_monotonic.tv_nsec += xtime.tv_nsec - tv->tv_nsec;
|
|
|
|
if (wall_to_monotonic.tv_nsec > NSEC_PER_SEC) {
|
|
wall_to_monotonic.tv_nsec -= NSEC_PER_SEC;
|
|
wall_to_monotonic.tv_sec++;
|
|
}
|
|
if (wall_to_monotonic.tv_nsec < 0) {
|
|
wall_to_monotonic.tv_nsec += NSEC_PER_SEC;
|
|
wall_to_monotonic.tv_sec--;
|
|
}
|
|
|
|
xtime.tv_sec = tv->tv_sec;
|
|
xtime.tv_nsec = tv->tv_nsec;
|
|
time_adjust = 0; /* stop active adjtime() */
|
|
time_status |= STA_UNSYNC;
|
|
time_maxerror = NTP_PHASE_LIMIT;
|
|
time_esterror = NTP_PHASE_LIMIT;
|
|
return 0;
|
|
}
|
|
|
|
#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_align_resource(void *data, struct resource *res,
|
|
unsigned long size, unsigned long align)
|
|
{
|
|
}
|
|
|
|
int pcibios_enable_device(struct pci_dev *pdev, int mask)
|
|
{
|
|
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, hanging\n",
|
|
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);
|
|
local_irq_save(flags);
|
|
writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void pcic_enable_irq(unsigned int irq_nr)
|
|
{
|
|
unsigned long mask, flags;
|
|
|
|
mask = get_irqmask(irq_nr);
|
|
local_irq_save(flags);
|
|
writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
|
|
local_irq_restore(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 has disabled local interrupts 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;
|
|
outb(*(const char *)src, addr);
|
|
src += 1;
|
|
/* addr += 1; */
|
|
}
|
|
}
|
|
|
|
void outsw(unsigned long addr, const void *src, unsigned long count)
|
|
{
|
|
while (count) {
|
|
count -= 2;
|
|
outw(*(const short *)src, addr);
|
|
src += 2;
|
|
/* addr += 2; */
|
|
}
|
|
}
|
|
|
|
void outsl(unsigned long addr, const void *src, unsigned long count)
|
|
{
|
|
while (count) {
|
|
count -= 4;
|
|
outl(*(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 = inb(addr);
|
|
dst += 1;
|
|
/* addr += 1; */
|
|
}
|
|
}
|
|
|
|
void insw(unsigned long addr, void *dst, unsigned long count)
|
|
{
|
|
while (count) {
|
|
count -= 2;
|
|
*(unsigned short *)dst = inw(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 = inl(addr);
|
|
dst += 4;
|
|
/* addr += 4; */
|
|
}
|
|
}
|
|
|
|
subsys_initcall(pcic_init);
|