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Diffstat (limited to 'arch/sh/boards/ec3104/irq.c')
| -rw-r--r-- | arch/sh/boards/ec3104/irq.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/sh/boards/ec3104/irq.c b/arch/sh/boards/ec3104/irq.c deleted file mode 100644 index ffa4ff1f090f..000000000000 --- a/arch/sh/boards/ec3104/irq.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * linux/arch/sh/boards/ec3104/irq.c - * EC3104 companion chip support - * - * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org> - * - */ - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/ec3104/ec3104.h> - -/* This is for debugging mostly; here's the table that I intend to keep - * in here: - * - * index function base addr power interrupt bit - * 0 power b0ec0000 --- 00000001 (unused) - * 1 irqs b0ec1000 --- 00000002 (unused) - * 2 ?? b0ec2000 b0ec0008 00000004 - * 3 PS2 (1) b0ec3000 b0ec000c 00000008 - * 4 PS2 (2) b0ec4000 b0ec0010 00000010 - * 5 ?? b0ec5000 b0ec0014 00000020 - * 6 I2C b0ec6000 b0ec0018 00000040 - * 7 serial (1) b0ec7000 b0ec001c 00000080 - * 8 serial (2) b0ec8000 b0ec0020 00000100 - * 9 serial (3) b0ec9000 b0ec0024 00000200 - * 10 serial (4) b0eca000 b0ec0028 00000400 - * 12 GPIO (1) b0ecc000 b0ec0030 - * 13 GPIO (2) b0ecc000 b0ec0030 - * 16 pcmcia (1) b0ed0000 b0ec0040 00010000 - * 17 pcmcia (2) b0ed1000 b0ec0044 00020000 - */ - -/* I used the register names from another interrupt controller I worked with, - * since it seems to be identical to the ec3104 except that all bits are - * inverted: - * - * IRR: Interrupt Request Register (pending and enabled interrupts) - * IMR: Interrupt Mask Register (which interrupts are enabled) - * IPR: Interrupt Pending Register (pending interrupts, even disabled ones) - * - * 0 bits mean pending or enabled, 1 bits mean not pending or disabled. all - * IRQs seem to be level-triggered. - */ - -#define EC3104_IRR (EC3104_BASE + 0x1000) -#define EC3104_IMR (EC3104_BASE + 0x1004) -#define EC3104_IPR (EC3104_BASE + 0x1008) - -#define ctrl_readl(addr) (*(volatile u32 *)(addr)) -#define ctrl_writel(data,addr) (*(volatile u32 *)(addr) = (data)) -#define ctrl_readb(addr) (*(volatile u8 *)(addr)) - -static char *ec3104_name(unsigned index) -{ - switch(index) { - case 0: - return "power management"; - case 1: - return "interrupts"; - case 3: - return "PS2 (1)"; - case 4: - return "PS2 (2)"; - case 5: - return "I2C (1)"; - case 6: - return "I2C (2)"; - case 7: - return "serial (1)"; - case 8: - return "serial (2)"; - case 9: - return "serial (3)"; - case 10: - return "serial (4)"; - case 16: - return "pcmcia (1)"; - case 17: - return "pcmcia (2)"; - default: { - static char buf[32]; - - sprintf(buf, "unknown (%d)", index); - - return buf; - } - } -} - -int get_pending_interrupts(char *buf) -{ - u32 ipr; - u32 bit; - char *p = buf; - - p += sprintf(p, "pending: ("); - - ipr = ctrl_inl(EC3104_IPR); - - for (bit = 1; bit < 32; bit++) - if (!(ipr & (1<<bit))) - p += sprintf(p, "%s ", ec3104_name(bit)); - - p += sprintf(p, ")\n"); - - return p - buf; -} - -static inline u32 ec3104_irq2mask(unsigned int irq) -{ - return (1 << (irq - EC3104_IRQBASE)); -} - -static inline void mask_ec3104_irq(unsigned int irq) -{ - u32 mask; - - mask = ctrl_readl(EC3104_IMR); - - mask |= ec3104_irq2mask(irq); - - ctrl_writel(mask, EC3104_IMR); -} - -static inline void unmask_ec3104_irq(unsigned int irq) -{ - u32 mask; - - mask = ctrl_readl(EC3104_IMR); - - mask &= ~ec3104_irq2mask(irq); - - ctrl_writel(mask, EC3104_IMR); -} - -static void disable_ec3104_irq(unsigned int irq) -{ - mask_ec3104_irq(irq); -} - -static void enable_ec3104_irq(unsigned int irq) -{ - unmask_ec3104_irq(irq); -} - -static void mask_and_ack_ec3104_irq(unsigned int irq) -{ - mask_ec3104_irq(irq); -} - -static void end_ec3104_irq(unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) - unmask_ec3104_irq(irq); -} - -static unsigned int startup_ec3104_irq(unsigned int irq) -{ - unmask_ec3104_irq(irq); - - return 0; -} - -static void shutdown_ec3104_irq(unsigned int irq) -{ - mask_ec3104_irq(irq); - -} - -static struct hw_interrupt_type ec3104_int = { - .typename = "EC3104", - .enable = enable_ec3104_irq, - .disable = disable_ec3104_irq, - .ack = mask_and_ack_ec3104_irq, - .end = end_ec3104_irq, - .startup = startup_ec3104_irq, - .shutdown = shutdown_ec3104_irq, -}; - -/* Yuck. the _demux API is ugly */ -int ec3104_irq_demux(int irq) -{ - if (irq == EC3104_IRQ) { - unsigned int mask; - - mask = ctrl_readl(EC3104_IRR); - - if (mask == 0xffffffff) - return EC3104_IRQ; - else - return EC3104_IRQBASE + ffz(mask); - } - - return irq; -} |