Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (C) 2000 YAEGASHI Takeshi |
| 3 | * Hitachi HD64461 companion chip support |
| 4 | */ |
| 5 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #include <linux/sched.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/param.h> |
| 10 | #include <linux/interrupt.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/irq.h> |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 13 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <asm/irq.h> |
Paul Mundt | 6d75e65 | 2006-09-27 13:42:57 +0900 | [diff] [blame] | 15 | #include <asm/hd64461.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Kristoffer Ericson | f138230 | 2007-09-11 12:48:45 +0900 | [diff] [blame] | 17 | /* This belongs in cpu specific */ |
| 18 | #define INTC_ICR1 0xA4140010UL |
| 19 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 20 | static void hd64461_mask_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | unsigned short nimr; |
| 23 | unsigned short mask = 1 << (irq - HD64461_IRQBASE); |
| 24 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 25 | nimr = __raw_readw(HD64461_NIMR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | nimr |= mask; |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 27 | __raw_writew(nimr, HD64461_NIMR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | } |
| 29 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 30 | static void hd64461_unmask_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | unsigned short nimr; |
| 33 | unsigned short mask = 1 << (irq - HD64461_IRQBASE); |
| 34 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 35 | nimr = __raw_readw(HD64461_NIMR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | nimr &= ~mask; |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 37 | __raw_writew(nimr, HD64461_NIMR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | } |
| 39 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 40 | static void hd64461_mask_and_ack_irq(unsigned int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | { |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 42 | hd64461_mask_irq(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #ifdef CONFIG_HD64461_ENABLER |
| 44 | if (irq == HD64461_IRQBASE + 13) |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 45 | __raw_writeb(0x00, HD64461_PCC1CSCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #endif |
| 47 | } |
| 48 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 49 | static struct irq_chip hd64461_irq_chip = { |
| 50 | .name = "HD64461-IRQ", |
| 51 | .mask = hd64461_mask_irq, |
| 52 | .mask_ack = hd64461_mask_and_ack_irq, |
| 53 | .unmask = hd64461_unmask_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int hd64461_irq_demux(int irq) |
| 57 | { |
| 58 | if (irq == CONFIG_HD64461_IRQ) { |
| 59 | unsigned short bit; |
| 60 | unsigned short nirr = inw(HD64461_NIRR); |
| 61 | unsigned short nimr = inw(HD64461_NIMR); |
| 62 | int i; |
| 63 | |
| 64 | nirr &= ~nimr; |
| 65 | for (bit = 1, i = 0; i < 16; bit <<= 1, i++) |
| 66 | if (nirr & bit) |
| 67 | break; |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 68 | irq = HD64461_IRQBASE + i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } |
Kristoffer Ericson | f138230 | 2007-09-11 12:48:45 +0900 | [diff] [blame] | 70 | return irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | int __init setup_hd64461(void) |
| 74 | { |
| 75 | int i; |
| 76 | |
| 77 | if (!MACH_HD64461) |
| 78 | return 0; |
| 79 | |
| 80 | printk(KERN_INFO |
| 81 | "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n", |
| 82 | CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE, |
| 83 | HD64461_IRQBASE + 15); |
| 84 | |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 85 | /* Should be at processor specific part.. */ |
| 86 | #if defined(CONFIG_CPU_SUBTYPE_SH7709) |
| 87 | __raw_writew(0x2240, INTC_ICR1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | #endif |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 89 | __raw_writew(0xffff, HD64461_NIMR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Kristoffer Ericson | f138230 | 2007-09-11 12:48:45 +0900 | [diff] [blame] | 91 | /* IRQ 80 -> 95 belongs to HD64461 */ |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 92 | for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) |
| 93 | set_irq_chip_and_handler(i, &hd64461_irq_chip, |
| 94 | handle_level_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | #ifdef CONFIG_HD64461_ENABLER |
| 97 | printk(KERN_INFO "HD64461: enabling PCMCIA devices\n"); |
Matt Fleming | 135210b | 2008-11-28 08:58:30 +0000 | [diff] [blame] | 98 | __raw_writeb(0x4c, HD64461_PCC1CSCIER); |
| 99 | __raw_writeb(0x00, HD64461_PCC1CSCR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #endif |
| 101 | |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | module_init(setup_hd64461); |