diff options
Diffstat (limited to 'arch/blackfin/mach-common/ints-priority.c')
| -rw-r--r-- | arch/blackfin/mach-common/ints-priority.c | 1268 |
1 files changed, 1268 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c new file mode 100644 index 00000000..332dace6 --- /dev/null +++ b/arch/blackfin/mach-common/ints-priority.c @@ -0,0 +1,1268 @@ +/* + * Set up the interrupt priorities + * + * Copyright 2004-2009 Analog Devices Inc. + * 2003 Bas Vermeulen <bas@buyways.nl> + * 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca> + * 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca> + * 1999 D. Jeff Dionne <jeff@uclinux.org> + * 1996 Roman Zippel + * + * Licensed under the GPL-2 + */ + +#include <linux/module.h> +#include <linux/kernel_stat.h> +#include <linux/seq_file.h> +#include <linux/irq.h> +#include <linux/sched.h> +#ifdef CONFIG_IPIPE +#include <linux/ipipe.h> +#endif +#include <asm/traps.h> +#include <asm/blackfin.h> +#include <asm/gpio.h> +#include <asm/irq_handler.h> +#include <asm/dpmc.h> + +#define SIC_SYSIRQ(irq) (irq - (IRQ_CORETMR + 1)) + +/* + * NOTES: + * - we have separated the physical Hardware interrupt from the + * levels that the LINUX kernel sees (see the description in irq.h) + * - + */ + +#ifndef CONFIG_SMP +/* Initialize this to an actual value to force it into the .data + * section so that we know it is properly initialized at entry into + * the kernel but before bss is initialized to zero (which is where + * it would live otherwise). The 0x1f magic represents the IRQs we + * cannot actually mask out in hardware. + */ +unsigned long bfin_irq_flags = 0x1f; +EXPORT_SYMBOL(bfin_irq_flags); +#endif + +#ifdef CONFIG_PM +unsigned long bfin_sic_iwr[3]; /* Up to 3 SIC_IWRx registers */ +unsigned vr_wakeup; +#endif + +static struct ivgx { + /* irq number for request_irq, available in mach-bf5xx/irq.h */ + unsigned int irqno; + /* corresponding bit in the SIC_ISR register */ + unsigned int isrflag; +} ivg_table[NR_PERI_INTS]; + +static struct ivg_slice { + /* position of first irq in ivg_table for given ivg */ + struct ivgx *ifirst; + struct ivgx *istop; +} ivg7_13[IVG13 - IVG7 + 1]; + + +/* + * Search SIC_IAR and fill tables with the irqvalues + * and their positions in the SIC_ISR register. + */ +static void __init search_IAR(void) +{ + unsigned ivg, irq_pos = 0; + for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) { + int irqN; + + ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos]; + + for (irqN = 0; irqN < NR_PERI_INTS; irqN += 4) { + int irqn; + u32 iar = bfin_read32((unsigned long *)SIC_IAR0 + +#if defined(CONFIG_BF51x) || defined(CONFIG_BF52x) || \ + defined(CONFIG_BF538) || defined(CONFIG_BF539) + ((irqN % 32) >> 3) + ((irqN / 32) * ((SIC_IAR4 - SIC_IAR0) / 4)) +#else + (irqN >> 3) +#endif + ); + + for (irqn = irqN; irqn < irqN + 4; ++irqn) { + int iar_shift = (irqn & 7) * 4; + if (ivg == (0xf & (iar >> iar_shift))) { + ivg_table[irq_pos].irqno = IVG7 + irqn; + ivg_table[irq_pos].isrflag = 1 << (irqn % 32); + ivg7_13[ivg].istop++; + irq_pos++; + } + } + } + } +} + +/* + * This is for core internal IRQs + */ + +void bfin_ack_noop(struct irq_data *d) +{ + /* Dummy function. */ +} + +static void bfin_core_mask_irq(struct irq_data *d) +{ + bfin_irq_flags &= ~(1 << d->irq); + if (!hard_irqs_disabled()) + hard_local_irq_enable(); +} + +static void bfin_core_unmask_irq(struct irq_data *d) +{ + bfin_irq_flags |= 1 << d->irq; + /* + * If interrupts are enabled, IMASK must contain the same value + * as bfin_irq_flags. Make sure that invariant holds. If interrupts + * are currently disabled we need not do anything; one of the + * callers will take care of setting IMASK to the proper value + * when reenabling interrupts. + * local_irq_enable just does "STI bfin_irq_flags", so it's exactly + * what we need. + */ + if (!hard_irqs_disabled()) + hard_local_irq_enable(); + return; +} + +void bfin_internal_mask_irq(unsigned int irq) +{ + unsigned long flags = hard_local_irq_save(); + +#ifdef SIC_IMASK0 + unsigned mask_bank = SIC_SYSIRQ(irq) / 32; + unsigned mask_bit = SIC_SYSIRQ(irq) % 32; + bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) & + ~(1 << mask_bit)); +# ifdef CONFIG_SMP + bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) & + ~(1 << mask_bit)); +# endif +#else + bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() & + ~(1 << SIC_SYSIRQ(irq))); +#endif + + hard_local_irq_restore(flags); +} + +static void bfin_internal_mask_irq_chip(struct irq_data *d) +{ + bfin_internal_mask_irq(d->irq); +} + +#ifdef CONFIG_SMP +static void bfin_internal_unmask_irq_affinity(unsigned int irq, + const struct cpumask *affinity) +#else +void bfin_internal_unmask_irq(unsigned int irq) +#endif +{ + unsigned long flags = hard_local_irq_save(); + +#ifdef SIC_IMASK0 + unsigned mask_bank = SIC_SYSIRQ(irq) / 32; + unsigned mask_bit = SIC_SYSIRQ(irq) % 32; +# ifdef CONFIG_SMP + if (cpumask_test_cpu(0, affinity)) +# endif + bfin_write_SIC_IMASK(mask_bank, + bfin_read_SIC_IMASK(mask_bank) | + (1 << mask_bit)); +# ifdef CONFIG_SMP + if (cpumask_test_cpu(1, affinity)) + bfin_write_SICB_IMASK(mask_bank, + bfin_read_SICB_IMASK(mask_bank) | + (1 << mask_bit)); +# endif +#else + bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() | + (1 << SIC_SYSIRQ(irq))); +#endif + + hard_local_irq_restore(flags); +} + +#ifdef CONFIG_SMP +static void bfin_internal_unmask_irq_chip(struct irq_data *d) +{ + bfin_internal_unmask_irq_affinity(d->irq, d->affinity); +} + +static int bfin_internal_set_affinity(struct irq_data *d, + const struct cpumask *mask, bool force) +{ + bfin_internal_mask_irq(d->irq); + bfin_internal_unmask_irq_affinity(d->irq, mask); + + return 0; +} +#else +static void bfin_internal_unmask_irq_chip(struct irq_data *d) +{ + bfin_internal_unmask_irq(d->irq); +} +#endif + +#ifdef CONFIG_PM +int bfin_internal_set_wake(unsigned int irq, unsigned int state) +{ + u32 bank, bit, wakeup = 0; + unsigned long flags; + bank = SIC_SYSIRQ(irq) / 32; + bit = SIC_SYSIRQ(irq) % 32; + + switch (irq) { +#ifdef IRQ_RTC + case IRQ_RTC: + wakeup |= WAKE; + break; +#endif +#ifdef IRQ_CAN0_RX + case IRQ_CAN0_RX: + wakeup |= CANWE; + break; +#endif +#ifdef IRQ_CAN1_RX + case IRQ_CAN1_RX: + wakeup |= CANWE; + break; +#endif +#ifdef IRQ_USB_INT0 + case IRQ_USB_INT0: + wakeup |= USBWE; + break; +#endif +#ifdef CONFIG_BF54x + case IRQ_CNT: + wakeup |= ROTWE; + break; +#endif + default: + break; + } + + flags = hard_local_irq_save(); + + if (state) { + bfin_sic_iwr[bank] |= (1 << bit); + vr_wakeup |= wakeup; + + } else { + bfin_sic_iwr[bank] &= ~(1 << bit); + vr_wakeup &= ~wakeup; + } + + hard_local_irq_restore(flags); + + return 0; +} + +static int bfin_internal_set_wake_chip(struct irq_data *d, unsigned int state) +{ + return bfin_internal_set_wake(d->irq, state); +} +#else +# define bfin_internal_set_wake_chip NULL +#endif + +static struct irq_chip bfin_core_irqchip = { + .name = "CORE", + .irq_ack = bfin_ack_noop, + .irq_mask = bfin_core_mask_irq, + .irq_unmask = bfin_core_unmask_irq, +}; + +static struct irq_chip bfin_internal_irqchip = { + .name = "INTN", + .irq_ack = bfin_ack_noop, + .irq_mask = bfin_internal_mask_irq_chip, + .irq_unmask = bfin_internal_unmask_irq_chip, + .irq_mask_ack = bfin_internal_mask_irq_chip, + .irq_disable = bfin_internal_mask_irq_chip, + .irq_enable = bfin_internal_unmask_irq_chip, +#ifdef CONFIG_SMP + .irq_set_affinity = bfin_internal_set_affinity, +#endif + .irq_set_wake = bfin_internal_set_wake_chip, +}; + +void bfin_handle_irq(unsigned irq) +{ +#ifdef CONFIG_IPIPE + struct pt_regs regs; /* Contents not used. */ + ipipe_trace_irq_entry(irq); + __ipipe_handle_irq(irq, ®s); + ipipe_trace_irq_exit(irq); +#else /* !CONFIG_IPIPE */ + generic_handle_irq(irq); +#endif /* !CONFIG_IPIPE */ +} + +#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE) +static int mac_stat_int_mask; + +static void bfin_mac_status_ack_irq(unsigned int irq) +{ + switch (irq) { + case IRQ_MAC_MMCINT: + bfin_write_EMAC_MMC_TIRQS( + bfin_read_EMAC_MMC_TIRQE() & + bfin_read_EMAC_MMC_TIRQS()); + bfin_write_EMAC_MMC_RIRQS( + bfin_read_EMAC_MMC_RIRQE() & + bfin_read_EMAC_MMC_RIRQS()); + break; + case IRQ_MAC_RXFSINT: + bfin_write_EMAC_RX_STKY( + bfin_read_EMAC_RX_IRQE() & + bfin_read_EMAC_RX_STKY()); + break; + case IRQ_MAC_TXFSINT: + bfin_write_EMAC_TX_STKY( + bfin_read_EMAC_TX_IRQE() & + bfin_read_EMAC_TX_STKY()); + break; + case IRQ_MAC_WAKEDET: + bfin_write_EMAC_WKUP_CTL( + bfin_read_EMAC_WKUP_CTL() | MPKS | RWKS); + break; + default: + /* These bits are W1C */ + bfin_write_EMAC_SYSTAT(1L << (irq - IRQ_MAC_PHYINT)); + break; + } +} + +static void bfin_mac_status_mask_irq(struct irq_data *d) +{ + unsigned int irq = d->irq; + + mac_stat_int_mask &= ~(1L << (irq - IRQ_MAC_PHYINT)); +#ifdef BF537_FAMILY + switch (irq) { + case IRQ_MAC_PHYINT: + bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() & ~PHYIE); + break; + default: + break; + } +#else + if (!mac_stat_int_mask) + bfin_internal_mask_irq(IRQ_MAC_ERROR); +#endif + bfin_mac_status_ack_irq(irq); +} + +static void bfin_mac_status_unmask_irq(struct irq_data *d) +{ + unsigned int irq = d->irq; + +#ifdef BF537_FAMILY + switch (irq) { + case IRQ_MAC_PHYINT: + bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() | PHYIE); + break; + default: + break; + } +#else + if (!mac_stat_int_mask) + bfin_internal_unmask_irq(IRQ_MAC_ERROR); +#endif + mac_stat_int_mask |= 1L << (irq - IRQ_MAC_PHYINT); +} + +#ifdef CONFIG_PM +int bfin_mac_status_set_wake(struct irq_data *d, unsigned int state) +{ +#ifdef BF537_FAMILY + return bfin_internal_set_wake(IRQ_GENERIC_ERROR, state); +#else + return bfin_internal_set_wake(IRQ_MAC_ERROR, state); +#endif +} +#else +# define bfin_mac_status_set_wake NULL +#endif + +static struct irq_chip bfin_mac_status_irqchip = { + .name = "MACST", + .irq_ack = bfin_ack_noop, + .irq_mask_ack = bfin_mac_status_mask_irq, + .irq_mask = bfin_mac_status_mask_irq, + .irq_unmask = bfin_mac_status_unmask_irq, + .irq_set_wake = bfin_mac_status_set_wake, +}; + +void bfin_demux_mac_status_irq(unsigned int int_err_irq, + struct irq_desc *inta_desc) +{ + int i, irq = 0; + u32 status = bfin_read_EMAC_SYSTAT(); + + for (i = 0; i <= (IRQ_MAC_STMDONE - IRQ_MAC_PHYINT); i++) + if (status & (1L << i)) { + irq = IRQ_MAC_PHYINT + i; + break; + } + + if (irq) { + if (mac_stat_int_mask & (1L << (irq - IRQ_MAC_PHYINT))) { + bfin_handle_irq(irq); + } else { + bfin_mac_status_ack_irq(irq); + pr_debug("IRQ %d:" + " MASKED MAC ERROR INTERRUPT ASSERTED\n", + irq); + } + } else + printk(KERN_ERR + "%s : %s : LINE %d :\nIRQ ?: MAC ERROR" + " INTERRUPT ASSERTED BUT NO SOURCE FOUND" + "(EMAC_SYSTAT=0x%X)\n", + __func__, __FILE__, __LINE__, status); +} +#endif + +static inline void bfin_set_irq_handler(unsigned irq, irq_flow_handler_t handle) +{ +#ifdef CONFIG_IPIPE + handle = handle_level_irq; +#endif + __irq_set_handler_locked(irq, handle); +} + +static DECLARE_BITMAP(gpio_enabled, MAX_BLACKFIN_GPIOS); +extern void bfin_gpio_irq_prepare(unsigned gpio); + +#if !BFIN_GPIO_PINT + +static void bfin_gpio_ack_irq(struct irq_data *d) +{ + /* AFAIK ack_irq in case mask_ack is provided + * get's only called for edge sense irqs + */ + set_gpio_data(irq_to_gpio(d->irq), 0); +} + +static void bfin_gpio_mask_ack_irq(struct irq_data *d) +{ + unsigned int irq = d->irq; + u32 gpionr = irq_to_gpio(irq); + + if (!irqd_is_level_type(d)) + set_gpio_data(gpionr, 0); + + set_gpio_maska(gpionr, 0); +} + +static void bfin_gpio_mask_irq(struct irq_data *d) +{ + set_gpio_maska(irq_to_gpio(d->irq), 0); +} + +static void bfin_gpio_unmask_irq(struct irq_data *d) +{ + set_gpio_maska(irq_to_gpio(d->irq), 1); +} + +static unsigned int bfin_gpio_irq_startup(struct irq_data *d) +{ + u32 gpionr = irq_to_gpio(d->irq); + + if (__test_and_set_bit(gpionr, gpio_enabled)) + bfin_gpio_irq_prepare(gpionr); + + bfin_gpio_unmask_irq(d); + + return 0; +} + +static void bfin_gpio_irq_shutdown(struct irq_data *d) +{ + u32 gpionr = irq_to_gpio(d->irq); + + bfin_gpio_mask_irq(d); + __clear_bit(gpionr, gpio_enabled); + bfin_gpio_irq_free(gpionr); +} + +static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type) +{ + unsigned int irq = d->irq; + int ret; + char buf[16]; + u32 gpionr = irq_to_gpio(irq); + + if (type == IRQ_TYPE_PROBE) { + /* only probe unenabled GPIO interrupt lines */ + if (test_bit(gpionr, gpio_enabled)) + return 0; + type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; + } + + if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING | + IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) { + + snprintf(buf, 16, "gpio-irq%d", irq); + ret = bfin_gpio_irq_request(gpionr, buf); + if (ret) + return ret; + + if (__test_and_set_bit(gpionr, gpio_enabled)) + bfin_gpio_irq_prepare(gpionr); + + } else { + __clear_bit(gpionr, gpio_enabled); + return 0; + } + + set_gpio_inen(gpionr, 0); + set_gpio_dir(gpionr, 0); + + if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) + == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) + set_gpio_both(gpionr, 1); + else + set_gpio_both(gpionr, 0); + + if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW))) + set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */ + else + set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */ + + if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { + set_gpio_edge(gpionr, 1); + set_gpio_inen(gpionr, 1); + set_gpio_data(gpionr, 0); + + } else { + set_gpio_edge(gpionr, 0); + set_gpio_inen(gpionr, 1); + } + + if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) + bfin_set_irq_handler(irq, handle_edge_irq); + else + bfin_set_irq_handler(irq, handle_level_irq); + + return 0; +} + +#ifdef CONFIG_PM +static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state) +{ + return gpio_pm_wakeup_ctrl(irq_to_gpio(d->irq), state); +} +#else +# define bfin_gpio_set_wake NULL +#endif + +static void bfin_demux_gpio_block(unsigned int irq) +{ + unsigned int gpio, mask; + + gpio = irq_to_gpio(irq); + mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio); + + while (mask) { + if (mask & 1) + bfin_handle_irq(irq); + irq++; + mask >>= 1; + } +} + +void bfin_demux_gpio_irq(unsigned int inta_irq, + struct irq_desc *desc) +{ + unsigned int irq; + + switch (inta_irq) { +#if defined(BF537_FAMILY) + case IRQ_PF_INTA_PG_INTA: + bfin_demux_gpio_block(IRQ_PF0); + irq = IRQ_PG0; + break; + case IRQ_PH_INTA_MAC_RX: + irq = IRQ_PH0; + break; +#elif defined(BF533_FAMILY) + case IRQ_PROG_INTA: + irq = IRQ_PF0; + break; +#elif defined(BF538_FAMILY) + case IRQ_PORTF_INTA: + irq = IRQ_PF0; + break; +#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) + case IRQ_PORTF_INTA: + irq = IRQ_PF0; + break; + case IRQ_PORTG_INTA: + irq = IRQ_PG0; + break; + case IRQ_PORTH_INTA: + irq = IRQ_PH0; + break; +#elif defined(CONFIG_BF561) + case IRQ_PROG0_INTA: + irq = IRQ_PF0; + break; + case IRQ_PROG1_INTA: + irq = IRQ_PF16; + break; + case IRQ_PROG2_INTA: + irq = IRQ_PF32; + break; +#endif + default: + BUG(); + return; + } + + bfin_demux_gpio_block(irq); +} + +#else + +#define NR_PINT_SYS_IRQS 4 +#define NR_PINT_BITS 32 +#define NR_PINTS 160 +#define IRQ_NOT_AVAIL 0xFF + +#define PINT_2_BANK(x) ((x) >> 5) +#define PINT_2_BIT(x) ((x) & 0x1F) +#define PINT_BIT(x) (1 << (PINT_2_BIT(x))) + +static unsigned char irq2pint_lut[NR_PINTS]; +static unsigned char pint2irq_lut[NR_PINT_SYS_IRQS * NR_PINT_BITS]; + +static struct bfin_pint_regs * const pint[NR_PINT_SYS_IRQS] = { + (struct bfin_pint_regs *)PINT0_MASK_SET, + (struct bfin_pint_regs *)PINT1_MASK_SET, + (struct bfin_pint_regs *)PINT2_MASK_SET, + (struct bfin_pint_regs *)PINT3_MASK_SET, +}; + +inline unsigned int get_irq_base(u32 bank, u8 bmap) +{ + unsigned int irq_base; + + if (bank < 2) { /*PA-PB */ + irq_base = IRQ_PA0 + bmap * 16; + } else { /*PC-PJ */ + irq_base = IRQ_PC0 + bmap * 16; + } + + return irq_base; +} + + /* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */ +void init_pint_lut(void) +{ + u16 bank, bit, irq_base, bit_pos; + u32 pint_assign; + u8 bmap; + + memset(irq2pint_lut, IRQ_NOT_AVAIL, sizeof(irq2pint_lut)); + + for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++) { + + pint_assign = pint[bank]->assign; + + for (bit = 0; bit < NR_PINT_BITS; bit++) { + + bmap = (pint_assign >> ((bit / 8) * 8)) & 0xFF; + + irq_base = get_irq_base(bank, bmap); + + irq_base += (bit % 8) + ((bit / 8) & 1 ? 8 : 0); + bit_pos = bit + bank * NR_PINT_BITS; + + pint2irq_lut[bit_pos] = irq_base - SYS_IRQS; + irq2pint_lut[irq_base - SYS_IRQS] = bit_pos; + } + } +} + +static void bfin_gpio_ack_irq(struct irq_data *d) +{ + u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS]; + u32 pintbit = PINT_BIT(pint_val); + u32 bank = PINT_2_BANK(pint_val); + + if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) { + if (pint[bank]->invert_set & pintbit) + pint[bank]->invert_clear = pintbit; + else + pint[bank]->invert_set = pintbit; + } + pint[bank]->request = pintbit; + +} + +static void bfin_gpio_mask_ack_irq(struct irq_data *d) +{ + u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS]; + u32 pintbit = PINT_BIT(pint_val); + u32 bank = PINT_2_BANK(pint_val); + + if (irqd_get_trigger_type(d) == IRQ_TYPE_EDGE_BOTH) { + if (pint[bank]->invert_set & pintbit) + pint[bank]->invert_clear = pintbit; + else + pint[bank]->invert_set = pintbit; + } + + pint[bank]->request = pintbit; + pint[bank]->mask_clear = pintbit; +} + +static void bfin_gpio_mask_irq(struct irq_data *d) +{ + u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS]; + + pint[PINT_2_BANK(pint_val)]->mask_clear = PINT_BIT(pint_val); +} + +static void bfin_gpio_unmask_irq(struct irq_data *d) +{ + u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS]; + u32 pintbit = PINT_BIT(pint_val); + u32 bank = PINT_2_BANK(pint_val); + + pint[bank]->mask_set = pintbit; +} + +static unsigned int bfin_gpio_irq_startup(struct irq_data *d) +{ + unsigned int irq = d->irq; + u32 gpionr = irq_to_gpio(irq); + u32 pint_val = irq2pint_lut[irq - SYS_IRQS]; + + if (pint_val == IRQ_NOT_AVAIL) { + printk(KERN_ERR + "GPIO IRQ %d :Not in PINT Assign table " + "Reconfigure Interrupt to Port Assignemt\n", irq); + return -ENODEV; + } + + if (__test_and_set_bit(gpionr, gpio_enabled)) + bfin_gpio_irq_prepare(gpionr); + + bfin_gpio_unmask_irq(d); + + return 0; +} + +static void bfin_gpio_irq_shutdown(struct irq_data *d) +{ + u32 gpionr = irq_to_gpio(d->irq); + + bfin_gpio_mask_irq(d); + __clear_bit(gpionr, gpio_enabled); + bfin_gpio_irq_free(gpionr); +} + +static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type) +{ + unsigned int irq = d->irq; + int ret; + char buf[16]; + u32 gpionr = irq_to_gpio(irq); + u32 pint_val = irq2pint_lut[irq - SYS_IRQS]; + u32 pintbit = PINT_BIT(pint_val); + u32 bank = PINT_2_BANK(pint_val); + + if (pint_val == IRQ_NOT_AVAIL) + return -ENODEV; + + if (type == IRQ_TYPE_PROBE) { + /* only probe unenabled GPIO interrupt lines */ + if (test_bit(gpionr, gpio_enabled)) + return 0; + type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; + } + + if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING | + IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) { + + snprintf(buf, 16, "gpio-irq%d", irq); + ret = bfin_gpio_irq_request(gpionr, buf); + if (ret) + return ret; + + if (__test_and_set_bit(gpionr, gpio_enabled)) + bfin_gpio_irq_prepare(gpionr); + + } else { + __clear_bit(gpionr, gpio_enabled); + return 0; + } + + if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW))) + pint[bank]->invert_set = pintbit; /* low or falling edge denoted by one */ + else + pint[bank]->invert_clear = pintbit; /* high or rising edge denoted by zero */ + + if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) + == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { + if (gpio_get_value(gpionr)) + pint[bank]->invert_set = pintbit; + else + pint[bank]->invert_clear = pintbit; + } + + if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { + pint[bank]->edge_set = pintbit; + bfin_set_irq_handler(irq, handle_edge_irq); + } else { + pint[bank]->edge_clear = pintbit; + bfin_set_irq_handler(irq, handle_level_irq); + } + + return 0; +} + +#ifdef CONFIG_PM +static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state) +{ + u32 pint_irq; + u32 pint_val = irq2pint_lut[d->irq - SYS_IRQS]; + u32 bank = PINT_2_BANK(pint_val); + + switch (bank) { + case 0: + pint_irq = IRQ_PINT0; + break; + case 2: + pint_irq = IRQ_PINT2; + break; + case 3: + pint_irq = IRQ_PINT3; + break; + case 1: + pint_irq = IRQ_PINT1; + break; + default: + return -EINVAL; + } + + bfin_internal_set_wake(pint_irq, state); + + return 0; +} +#else +# define bfin_gpio_set_wake NULL +#endif + +void bfin_demux_gpio_irq(unsigned int inta_irq, + struct irq_desc *desc) +{ + u32 bank, pint_val; + u32 request, irq; + + switch (inta_irq) { + case IRQ_PINT0: + bank = 0; + break; + case IRQ_PINT2: + bank = 2; + break; + case IRQ_PINT3: + bank = 3; + break; + case IRQ_PINT1: + bank = 1; + break; + default: + return; + } + + pint_val = bank * NR_PINT_BITS; + + request = pint[bank]->request; + + while (request) { + if (request & 1) { + irq = pint2irq_lut[pint_val] + SYS_IRQS; + bfin_handle_irq(irq); + } + pint_val++; + request >>= 1; + } + +} +#endif + +static struct irq_chip bfin_gpio_irqchip = { + .name = "GPIO", + .irq_ack = bfin_gpio_ack_irq, + .irq_mask = bfin_gpio_mask_irq, + .irq_mask_ack = bfin_gpio_mask_ack_irq, + .irq_unmask = bfin_gpio_unmask_irq, + .irq_disable = bfin_gpio_mask_irq, + .irq_enable = bfin_gpio_unmask_irq, + .irq_set_type = bfin_gpio_irq_type, + .irq_startup = bfin_gpio_irq_startup, + .irq_shutdown = bfin_gpio_irq_shutdown, + .irq_set_wake = bfin_gpio_set_wake, +}; + +void __cpuinit init_exception_vectors(void) +{ + /* cannot program in software: + * evt0 - emulation (jtag) + * evt1 - reset + */ + bfin_write_EVT2(evt_nmi); + bfin_write_EVT3(trap); + bfin_write_EVT5(evt_ivhw); + bfin_write_EVT6(evt_timer); + bfin_write_EVT7(evt_evt7); + bfin_write_EVT8(evt_evt8); + bfin_write_EVT9(evt_evt9); + bfin_write_EVT10(evt_evt10); + bfin_write_EVT11(evt_evt11); + bfin_write_EVT12(evt_evt12); + bfin_write_EVT13(evt_evt13); + bfin_write_EVT14(evt_evt14); + bfin_write_EVT15(evt_system_call); + CSYNC(); +} + +/* + * This function should be called during kernel startup to initialize + * the BFin IRQ handling routines. + */ + +int __init init_arch_irq(void) +{ + int irq; + unsigned long ilat = 0; + + /* Disable all the peripheral intrs - page 4-29 HW Ref manual */ +#ifdef SIC_IMASK0 + bfin_write_SIC_IMASK0(SIC_UNMASK_ALL); + bfin_write_SIC_IMASK1(SIC_UNMASK_ALL); +# ifdef SIC_IMASK2 + bfin_write_SIC_IMASK2(SIC_UNMASK_ALL); +# endif +# ifdef CONFIG_SMP + bfin_write_SICB_IMASK0(SIC_UNMASK_ALL); + bfin_write_SICB_IMASK1(SIC_UNMASK_ALL); +# endif +#else + bfin_write_SIC_IMASK(SIC_UNMASK_ALL); +#endif + + local_irq_disable(); + +#if BFIN_GPIO_PINT +# ifdef CONFIG_PINTx_REASSIGN + pint[0]->assign = CONFIG_PINT0_ASSIGN; + pint[1]->assign = CONFIG_PINT1_ASSIGN; + pint[2]->assign = CONFIG_PINT2_ASSIGN; + pint[3]->assign = CONFIG_PINT3_ASSIGN; +# endif + /* Whenever PINTx_ASSIGN is altered init_pint_lut() must be executed! */ + init_pint_lut(); +#endif + + for (irq = 0; irq <= SYS_IRQS; irq++) { + if (irq <= IRQ_CORETMR) + irq_set_chip(irq, &bfin_core_irqchip); + else + irq_set_chip(irq, &bfin_internal_irqchip); + + switch (irq) { +#if BFIN_GPIO_PINT + case IRQ_PINT0: + case IRQ_PINT1: + case IRQ_PINT2: + case IRQ_PINT3: +#elif defined(BF537_FAMILY) + case IRQ_PH_INTA_MAC_RX: + case IRQ_PF_INTA_PG_INTA: +#elif defined(BF533_FAMILY) + case IRQ_PROG_INTA: +#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) + case IRQ_PORTF_INTA: + case IRQ_PORTG_INTA: + case IRQ_PORTH_INTA: +#elif defined(CONFIG_BF561) + case IRQ_PROG0_INTA: + case IRQ_PROG1_INTA: + case IRQ_PROG2_INTA: +#elif defined(BF538_FAMILY) + case IRQ_PORTF_INTA: +#endif + irq_set_chained_handler(irq, bfin_demux_gpio_irq); + break; +#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE) + case IRQ_MAC_ERROR: + irq_set_chained_handler(irq, + bfin_demux_mac_status_irq); + break; +#endif +#ifdef CONFIG_SMP + case IRQ_SUPPLE_0: + case IRQ_SUPPLE_1: + irq_set_handler(irq, handle_percpu_irq); + break; +#endif + +#ifdef CONFIG_TICKSOURCE_CORETMR + case IRQ_CORETMR: +# ifdef CONFIG_SMP + irq_set_handler(irq, handle_percpu_irq); +# else + irq_set_handler(irq, handle_simple_irq); +# endif + break; +#endif + +#ifdef CONFIG_TICKSOURCE_GPTMR0 + case IRQ_TIMER0: + irq_set_handler(irq, handle_simple_irq); + break; +#endif + + default: +#ifdef CONFIG_IPIPE + irq_set_handler(irq, handle_level_irq); +#else + irq_set_handler(irq, handle_simple_irq); +#endif + break; + } + } + + init_mach_irq(); + +#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE) + for (irq = IRQ_MAC_PHYINT; irq <= IRQ_MAC_STMDONE; irq++) + irq_set_chip_and_handler(irq, &bfin_mac_status_irqchip, + handle_level_irq); +#endif + /* if configured as edge, then will be changed to do_edge_IRQ */ + for (irq = GPIO_IRQ_BASE; + irq < (GPIO_IRQ_BASE + MAX_BLACKFIN_GPIOS); irq++) + irq_set_chip_and_handler(irq, &bfin_gpio_irqchip, + handle_level_irq); + + bfin_write_IMASK(0); + CSYNC(); + ilat = bfin_read_ILAT(); + CSYNC(); + bfin_write_ILAT(ilat); + CSYNC(); + + printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n"); + /* IMASK=xxx is equivalent to STI xx or bfin_irq_flags=xx, + * local_irq_enable() + */ + program_IAR(); + /* Therefore it's better to setup IARs before interrupts enabled */ + search_IAR(); + + /* Enable interrupts IVG7-15 */ + bfin_irq_flags |= IMASK_IVG15 | + IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 | + IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW; + + /* This implicitly covers ANOMALY_05000171 + * Boot-ROM code modifies SICA_IWRx wakeup registers + */ +#ifdef SIC_IWR0 + bfin_write_SIC_IWR0(IWR_DISABLE_ALL); +# ifdef SIC_IWR1 + /* BF52x/BF51x system reset does not properly reset SIC_IWR1 which + * will screw up the bootrom as it relies on MDMA0/1 waking it + * up from IDLE instructions. See this report for more info: + * http://blackfin.uclinux.org/gf/tracker/4323 + */ + if (ANOMALY_05000435) + bfin_write_SIC_IWR1(IWR_ENABLE(10) | IWR_ENABLE(11)); + else + bfin_write_SIC_IWR1(IWR_DISABLE_ALL); +# endif +# ifdef SIC_IWR2 + bfin_write_SIC_IWR2(IWR_DISABLE_ALL); +# endif +#else + bfin_write_SIC_IWR(IWR_DISABLE_ALL); +#endif + + return 0; +} + +#ifdef CONFIG_DO_IRQ_L1 +__attribute__((l1_text)) +#endif +static int vec_to_irq(int vec) +{ + struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst; + struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop; + unsigned long sic_status[3]; + + if (likely(vec == EVT_IVTMR_P)) + return IRQ_CORETMR; + +#ifdef SIC_ISR + sic_status[0] = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR(); +#else + if (smp_processor_id()) { +# ifdef SICB_ISR0 + /* This will be optimized out in UP mode. */ + sic_status[0] = bfin_read_SICB_ISR0() & bfin_read_SICB_IMASK0(); + sic_status[1] = bfin_read_SICB_ISR1() & bfin_read_SICB_IMASK1(); +# endif + } else { + sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0(); + sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1(); + } +#endif +#ifdef SIC_ISR2 + sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2(); +#endif + + for (;; ivg++) { + if (ivg >= ivg_stop) + return -1; +#ifdef SIC_ISR + if (sic_status[0] & ivg->isrflag) +#else + if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag) +#endif + return ivg->irqno; + } +} + +#ifdef CONFIG_DO_IRQ_L1 +__attribute__((l1_text)) +#endif +void do_irq(int vec, struct pt_regs *fp) +{ + int irq = vec_to_irq(vec); + if (irq == -1) + return; + asm_do_IRQ(irq, fp); +} + +#ifdef CONFIG_IPIPE + +int __ipipe_get_irq_priority(unsigned irq) +{ + int ient, prio; + + if (irq <= IRQ_CORETMR) + return irq; + + for (ient = 0; ient < NR_PERI_INTS; ient++) { + struct ivgx *ivg = ivg_table + ient; + if (ivg->irqno == irq) { + for (prio = 0; prio <= IVG13-IVG7; prio++) { + if (ivg7_13[prio].ifirst <= ivg && + ivg7_13[prio].istop > ivg) + return IVG7 + prio; + } + } + } + + return IVG15; +} + +/* Hw interrupts are disabled on entry (check SAVE_CONTEXT). */ +#ifdef CONFIG_DO_IRQ_L1 +__attribute__((l1_text)) +#endif +asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs) +{ + struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr(); + struct ipipe_domain *this_domain = __ipipe_current_domain; + struct ivgx *ivg_stop = ivg7_13[vec-IVG7].istop; + struct ivgx *ivg = ivg7_13[vec-IVG7].ifirst; + int irq, s = 0; + + irq = vec_to_irq(vec); + if (irq == -1) + return 0; + + if (irq == IRQ_SYSTMR) { +#if !defined(CONFIG_GENERIC_CLOCKEVENTS) || defined(CONFIG_TICKSOURCE_GPTMR0) + bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */ +#endif + /* This is basically what we need from the register frame. */ + __raw_get_cpu_var(__ipipe_tick_regs).ipend = regs->ipend; + __raw_get_cpu_var(__ipipe_tick_regs).pc = regs->pc; + if (this_domain != ipipe_root_domain) + __raw_get_cpu_var(__ipipe_tick_regs).ipend &= ~0x10; + else + __raw_get_cpu_var(__ipipe_tick_regs).ipend |= 0x10; + } + + /* + * We don't want Linux interrupt handlers to run at the + * current core priority level (i.e. < EVT15), since this + * might delay other interrupts handled by a high priority + * domain. Here is what we do instead: + * + * - we raise the SYNCDEFER bit to prevent + * __ipipe_handle_irq() to sync the pipeline for the root + * stage for the incoming interrupt. Upon return, that IRQ is + * pending in the interrupt log. + * + * - we raise the TIF_IRQ_SYNC bit for the current thread, so + * that _schedule_and_signal_from_int will eventually sync the + * pipeline from EVT15. + */ + if (this_domain == ipipe_root_domain) { + s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status); + barrier(); + } + + ipipe_trace_irq_entry(irq); + __ipipe_handle_irq(irq, regs); + ipipe_trace_irq_exit(irq); + + if (user_mode(regs) && + !ipipe_test_foreign_stack() && + (current->ipipe_flags & PF_EVTRET) != 0) { + /* + * Testing for user_regs() does NOT fully eliminate + * foreign stack contexts, because of the forged + * interrupt returns we do through + * __ipipe_call_irqtail. In that case, we might have + * preempted a foreign stack context in a high + * priority domain, with a single interrupt level now + * pending after the irqtail unwinding is done. In + * which case user_mode() is now true, and the event + * gets dispatched spuriously. + */ + current->ipipe_flags &= ~PF_EVTRET; + __ipipe_dispatch_event(IPIPE_EVENT_RETURN, regs); + } + + if (this_domain == ipipe_root_domain) { + set_thread_flag(TIF_IRQ_SYNC); + if (!s) { + __clear_bit(IPIPE_SYNCDEFER_FLAG, &p->status); + return !test_bit(IPIPE_STALL_FLAG, &p->status); + } + } + + return 0; +} + +#endif /* CONFIG_IPIPE */ |