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Diffstat (limited to 'arch/sparc/kernel/pcic.c')
-rw-r--r--arch/sparc/kernel/pcic.c363
1 files changed, 99 insertions, 264 deletions
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index 85e7037429b..6cc78c213c0 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -25,15 +25,18 @@
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/interrupt.h>
+#include <linux/export.h>
#include <asm/irq.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/pcic.h>
+#include <asm/timex.h>
#include <asm/timer.h>
#include <asm/uaccess.h>
#include <asm/irq_regs.h>
+#include "kernel.h"
#include "irq.h"
/*
@@ -160,11 +163,12 @@ static int pcic0_up;
static struct linux_pcic pcic0;
void __iomem *pcic_regs;
-volatile int pcic_speculative;
-volatile int pcic_trapped;
+static volatile int pcic_speculative;
+static volatile int pcic_trapped;
-static void pci_do_gettimeofday(struct timeval *tv);
-static int pci_do_settimeofday(struct timespec *tv);
+/* forward */
+unsigned int pcic_build_device_irq(struct platform_device *op,
+ unsigned int real_irq);
#define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3))
@@ -285,7 +289,7 @@ int __init pcic_probe(void)
struct linux_prom_registers regs[PROMREG_MAX];
struct linux_pbm_info* pbm;
char namebuf[64];
- int node;
+ phandle node;
int err;
if (pcic0_up) {
@@ -326,7 +330,7 @@ int __init pcic_probe(void)
pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr";
if ((pcic->pcic_config_space_addr =
- ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == 0) {
+ ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == NULL) {
prom_printf("PCIC: Error, cannot map "
"PCI Configuration Space Address.\n");
prom_halt();
@@ -338,7 +342,7 @@ int __init pcic_probe(void)
*/
pcic->pcic_res_cfg_data.name = "pcic_cfg_data";
if ((pcic->pcic_config_space_data =
- ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == 0) {
+ ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == NULL) {
prom_printf("PCIC: Error, cannot map "
"PCI Configuration Space Data.\n");
prom_halt();
@@ -350,8 +354,7 @@ int __init pcic_probe(void)
strcpy(pbm->prom_name, namebuf);
{
- extern volatile int t_nmi[1];
- extern int pcic_nmi_trap_patch[1];
+ extern int pcic_nmi_trap_patch[4];
t_nmi[0] = pcic_nmi_trap_patch[0];
t_nmi[1] = pcic_nmi_trap_patch[1];
@@ -436,12 +439,11 @@ int pcic_present(void)
return pcic0_up;
}
-static int __devinit pdev_to_pnode(struct linux_pbm_info *pbm,
- struct pci_dev *pdev)
+static int 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);
+ phandle node = prom_getchild(pbm->prom_node);
while(node) {
err = prom_getproperty(node, "reg",
@@ -524,6 +526,7 @@ static void
pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
{
struct pcic_ca2irq *p;
+ unsigned int real_irq;
int i, ivec;
char namebuf[64];
@@ -533,7 +536,7 @@ pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
prom_getstring(node, "name", namebuf, sizeof(namebuf));
}
- if ((p = pcic->pcic_imap) == 0) {
+ if ((p = pcic->pcic_imap) == NULL) {
dev->irq = 0;
return;
}
@@ -552,26 +555,25 @@ pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
i = p->pin;
if (i >= 0 && i < 4) {
ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO);
- dev->irq = ivec >> (i << 2) & 0xF;
+ real_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;
+ real_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
+ /* real_irq 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 (real_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;
+ real_irq = p->irq;
i = p->pin;
if (i >= 4) {
@@ -585,15 +587,14 @@ pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node)
ivec |= p->irq << (i << 2);
writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO);
}
- }
-
- return;
+ }
+ dev->irq = pcic_build_device_irq(NULL, real_irq);
}
/*
* Normally called from {do_}pci_scan_bus...
*/
-void __devinit pcibios_fixup_bus(struct pci_bus *bus)
+void pcibios_fixup_bus(struct pci_bus *bus)
{
struct pci_dev *dev;
int i, has_io, has_mem;
@@ -669,30 +670,6 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
}
}
-/*
- * pcic_pin_to_irq() is exported to bus probing code
- */
-unsigned int
-pcic_pin_to_irq(unsigned int pin, const 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;
@@ -701,35 +678,46 @@ 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)
+/* CPU frequency is 100 MHz, timer increments every 4 CPU clocks */
+#define USECS_PER_JIFFY (1000000 / HZ)
+#define TICK_TIMER_LIMIT ((100 * 1000000 / 4) / HZ)
+
+static unsigned int pcic_cycles_offset(void)
{
- write_seqlock(&xtime_lock); /* Dummy, to show that we remember */
- pcic_clear_clock_irq();
- do_timer(1);
- write_sequnlock(&xtime_lock);
-#ifndef CONFIG_SMP
- update_process_times(user_mode(get_irq_regs()));
-#endif
- return IRQ_HANDLED;
-}
+ u32 value, count;
-#define USECS_PER_JIFFY 10000 /* We have 100HZ "standard" timer for sparc */
-#define TICK_TIMER_LIMIT ((100*1000000/4)/100)
+ value = readl(pcic0.pcic_regs + PCI_SYS_COUNTER);
+ count = value & ~PCI_SYS_COUNTER_OVERFLOW;
+
+ if (value & PCI_SYS_COUNTER_OVERFLOW)
+ count += TICK_TIMER_LIMIT;
+ /*
+ * We divide all by HZ
+ * to have microsecond resolution and to avoid overflow
+ */
+ count = ((count / HZ) * USECS_PER_JIFFY) / (TICK_TIMER_LIMIT / HZ);
+
+ /* Coordinate with the sparc_config.clock_rate setting */
+ return count * 2;
+}
void __init pci_time_init(void)
{
struct linux_pcic *pcic = &pcic0;
unsigned long v;
int timer_irq, irq;
+ int err;
- /* 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();
+#ifndef CONFIG_SMP
+ /*
+ * The clock_rate is in SBUS dimension.
+ * We take into account this in pcic_cycles_offset()
+ */
+ sparc_config.clock_rate = SBUS_CLOCK_RATE / HZ;
+ sparc_config.features |= FEAT_L10_CLOCKEVENT;
+#endif
+ sparc_config.features |= FEAT_L10_CLOCKSOURCE;
+ sparc_config.get_cycles_offset = pcic_cycles_offset;
writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT);
/* PROM should set appropriate irq */
@@ -737,93 +725,16 @@ void __init pci_time_init(void)
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,
- (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
- if (irq) {
+ irq = pcic_build_device_irq(NULL, timer_irq);
+ err = request_irq(irq, timer_interrupt,
+ IRQF_TIMER, "timer", NULL);
+ if (err) {
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 divide all by 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;
-}
-
-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 {
- seq = read_seqbegin_irqsave(&xtime_lock, flags);
- usec = do_gettimeoffset();
-
- /*
- * 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);
-
- 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();
- 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;
- ntp_clear();
- return 0;
-}
#if 0
static void watchdog_reset() {
@@ -831,17 +742,10 @@ static void watchdog_reset() {
}
#endif
-/*
- * Other archs parse arguments here.
- */
-char * __devinit pcibios_setup(char *str)
-{
- return str;
-}
-
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+ resource_size_t size, resource_size_t align)
{
+ return res->start;
}
int pcibios_enable_device(struct pci_dev *pdev, int mask)
@@ -855,7 +759,7 @@ int pcibios_enable_device(struct pci_dev *pdev, int mask)
void pcic_nmi(unsigned int pend, struct pt_regs *regs)
{
- pend = flip_dword(pend);
+ pend = swab32(pend);
if (!pcic_speculative || (pend & PCI_SYS_INT_PENDING_PIO) == 0) {
/*
@@ -877,143 +781,74 @@ static inline unsigned long get_irqmask(int irq_nr)
return 1 << irq_nr;
}
-static void pcic_disable_irq(unsigned int irq_nr)
+static void pcic_mask_irq(struct irq_data *data)
{
unsigned long mask, flags;
- mask = get_irqmask(irq_nr);
+ mask = (unsigned long)data->chip_data;
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)
+static void pcic_unmask_irq(struct irq_data *data)
{
unsigned long mask, flags;
- mask = get_irqmask(irq_nr);
+ mask = (unsigned long)data->chip_data;
local_irq_save(flags);
writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR);
local_irq_restore(flags);
}
-static void pcic_load_profile_irq(int cpu, unsigned int limit)
+static unsigned int pcic_startup_irq(struct irq_data *data)
{
- 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(load_profile_irq, pcic_load_profile_irq, BTFIXUPCALL_NORM);
+ irq_link(data->irq);
+ pcic_unmask_irq(data);
+ return 0;
}
-int pcibios_assign_resource(struct pci_dev *pdev, int resource)
-{
- return -ENXIO;
-}
+static struct irq_chip pcic_irq = {
+ .name = "pcic",
+ .irq_startup = pcic_startup_irq,
+ .irq_mask = pcic_mask_irq,
+ .irq_unmask = pcic_unmask_irq,
+};
-struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
+unsigned int pcic_build_device_irq(struct platform_device *op,
+ unsigned int real_irq)
{
- struct pcidev_cookie *pc = pdev->sysdata;
+ unsigned int irq;
+ unsigned long mask;
- return pc->prom_node;
-}
-EXPORT_SYMBOL(pci_device_to_OF_node);
+ irq = 0;
+ mask = get_irqmask(real_irq);
+ if (mask == 0)
+ goto out;
-/*
- * 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 horrible macros 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; */
- }
-}
-EXPORT_SYMBOL(outsb);
+ irq = irq_alloc(real_irq, real_irq);
+ if (irq == 0)
+ goto out;
-void outsw(unsigned long addr, const void *src, unsigned long count)
-{
- while (count) {
- count -= 2;
- outw(*(const short *)src, addr);
- src += 2;
- /* addr += 2; */
- }
-}
-EXPORT_SYMBOL(outsw);
+ irq_set_chip_and_handler_name(irq, &pcic_irq,
+ handle_level_irq, "PCIC");
+ irq_set_chip_data(irq, (void *)mask);
-void outsl(unsigned long addr, const void *src, unsigned long count)
-{
- while (count) {
- count -= 4;
- outl(*(const long *)src, addr);
- src += 4;
- /* addr += 4; */
- }
+out:
+ return irq;
}
-EXPORT_SYMBOL(outsl);
-void insb(unsigned long addr, void *dst, unsigned long count)
-{
- while (count) {
- count -= 1;
- *(unsigned char *)dst = inb(addr);
- dst += 1;
- /* addr += 1; */
- }
-}
-EXPORT_SYMBOL(insb);
-void insw(unsigned long addr, void *dst, unsigned long count)
+static void pcic_load_profile_irq(int cpu, unsigned int limit)
{
- while (count) {
- count -= 2;
- *(unsigned short *)dst = inw(addr);
- dst += 2;
- /* addr += 2; */
- }
+ printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__);
}
-EXPORT_SYMBOL(insw);
-void insl(unsigned long addr, void *dst, unsigned long count)
+void __init sun4m_pci_init_IRQ(void)
{
- 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; */
- }
+ sparc_config.build_device_irq = pcic_build_device_irq;
+ sparc_config.clear_clock_irq = pcic_clear_clock_irq;
+ sparc_config.load_profile_irq = pcic_load_profile_irq;
}
-EXPORT_SYMBOL(insl);
subsys_initcall(pcic_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 17:31:39 +0000