diff options
Diffstat (limited to 'arch/sparc/kernel/pcic.c')
| -rw-r--r-- | arch/sparc/kernel/pcic.c | 402 |
1 files changed, 109 insertions, 293 deletions
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c index 25e31d5ec99..6cc78c213c0 100644 --- a/arch/sparc/kernel/pcic.c +++ b/arch/sparc/kernel/pcic.c @@ -10,7 +10,6 @@ * CP-1200 by Eric Brower. */ -#include <linux/config.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/init.h> @@ -18,8 +17,6 @@ #include <linux/slab.h> #include <linux/jiffies.h> -#include <asm/ebus.h> -#include <asm/sbus.h> /* for sanity check... */ #include <asm/swift.h> /* for cache flushing. */ #include <asm/io.h> @@ -28,15 +25,19 @@ #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> - -unsigned int pcic_pin_to_irq(unsigned int pin, char *name); +#include "kernel.h" +#include "irq.h" /* * I studied different documents and many live PROMs both from 2.30 @@ -143,7 +144,7 @@ static struct pcic_ca2irq pcic_i_jk[] = { * as several PROMs may be installed on the same physical board. */ #define SN2L_INIT(name, map) \ - { name, map, sizeof(map)/sizeof(struct pcic_ca2irq) } + { name, map, ARRAY_SIZE(map) } static struct pcic_sn2list pcic_known_sysnames[] = { SN2L_INIT("SUNW,JavaEngine1", pcic_i_je1a), /* JE1, PROM 2.32 */ @@ -161,12 +162,13 @@ static struct pcic_sn2list pcic_known_sysnames[] = { static int pcic0_up; static struct linux_pcic pcic0; -void * __iomem pcic_regs; -volatile int pcic_speculative; -volatile int pcic_trapped; +void __iomem *pcic_regs; +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)) @@ -287,7 +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) { @@ -328,8 +330,8 @@ 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) { - prom_printf("PCIC: Error, cannot map" + ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == NULL) { + prom_printf("PCIC: Error, cannot map " "PCI Configuration Space Address.\n"); prom_halt(); } @@ -340,8 +342,8 @@ 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) { - prom_printf("PCIC: Error, cannot map" + ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == NULL) { + prom_printf("PCIC: Error, cannot map " "PCI Configuration Space Data.\n"); prom_halt(); } @@ -352,8 +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]; @@ -430,7 +431,6 @@ static int __init pcic_init(void) pcic_pbm_scan_bus(pcic); - ebus_init(); return 0; } @@ -439,12 +439,11 @@ int pcic_present(void) return pcic0_up; } -static int __init 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", @@ -493,10 +492,6 @@ static void pcic_map_pci_device(struct linux_pcic *pcic, * 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 request_region() * works for these devices. * @@ -518,8 +513,8 @@ static void pcic_map_pci_device(struct linux_pcic *pcic, * 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;" + 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); } @@ -531,6 +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]; @@ -540,7 +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; } @@ -559,26 +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) { @@ -592,15 +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 __init 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; @@ -665,7 +659,7 @@ void __init pcibios_fixup_bus(struct pci_bus *bus) /* cookies */ pcp = pci_devcookie_alloc(); pcp->pbm = &pcic->pbm; - pcp->prom_node = node; + pcp->prom_node = of_find_node_by_phandle(node); dev->sysdata = pcp; /* fixing I/O to look like memory */ @@ -676,30 +670,6 @@ void __init pcibios_fixup_bus(struct pci_bus *bus) } } -/* - * 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; @@ -708,35 +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, struct pt_regs *regs) +/* 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(regs); -#ifndef CONFIG_SMP - update_process_times(user_mode(regs)); -#endif - write_sequnlock(&xtime_lock); - 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 */ @@ -744,105 +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, - (SA_INTERRUPT | 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 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; - ntp_clear(); - return 0; -} #if 0 static void watchdog_reset() { @@ -850,17 +742,10 @@ static void watchdog_reset() { } #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) +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) @@ -874,7 +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) { /* @@ -896,143 +781,74 @@ 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) +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_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) +static unsigned int pcic_startup_irq(struct irq_data *data) { - writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET); + irq_link(data->irq); + pcic_unmask_irq(data); + return 0; } -static void pcic_enable_pil_irq(unsigned int pil) -{ - writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR); -} +static struct irq_chip pcic_irq = { + .name = "pcic", + .irq_startup = pcic_startup_irq, + .irq_mask = pcic_mask_irq, + .irq_unmask = pcic_unmask_irq, +}; -void __init sun4m_pci_init_IRQ(void) +unsigned int pcic_build_device_irq(struct platform_device *op, + unsigned int real_irq) { - 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); -} + unsigned int irq; + unsigned long mask; -int pcibios_assign_resource(struct pci_dev *pdev, int resource) -{ - return -ENXIO; -} + 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 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; */ - } -} + 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; */ - } -} + 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; } -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) +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__); } -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; } subsys_initcall(pcic_init); |
