Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/h8300/platform/h8s/ints_h8s.c |
| 3 | * Interrupt handling CPU variants |
| 4 | * |
| 5 | * Yoshinori Sato <ysato@users.sourceforge.jp> |
| 6 | * |
| 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/init.h> |
| 10 | #include <linux/errno.h> |
| 11 | #include <linux/kernel.h> |
| 12 | |
| 13 | #include <asm/ptrace.h> |
| 14 | #include <asm/traps.h> |
| 15 | #include <asm/irq.h> |
| 16 | #include <asm/io.h> |
| 17 | #include <asm/gpio.h> |
| 18 | #include <asm/regs267x.h> |
| 19 | |
| 20 | /* saved vector list */ |
| 21 | const int __initdata h8300_saved_vectors[]={ |
| 22 | #if defined(CONFIG_GDB_DEBUG) |
| 23 | TRACE_VEC, |
| 24 | TRAP3_VEC, |
| 25 | #endif |
| 26 | -1 |
| 27 | }; |
| 28 | |
| 29 | /* trap entry table */ |
Yoshinori Sato | 5cc265a | 2008-02-23 15:23:59 -0800 | [diff] [blame] | 30 | const H8300_VECTOR __initdata h8300_trap_table[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | 0,0,0,0,0, |
Yoshinori Sato | 5cc265a | 2008-02-23 15:23:59 -0800 | [diff] [blame] | 32 | trace_break, /* TRACE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | 0,0, |
Yoshinori Sato | 5cc265a | 2008-02-23 15:23:59 -0800 | [diff] [blame] | 34 | system_call, /* TRAPA #0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | 0,0,0,0,0,0,0 |
| 36 | }; |
| 37 | |
| 38 | /* IRQ pin assignment */ |
| 39 | struct irq_pins { |
| 40 | unsigned char port_no; |
| 41 | unsigned char bit_no; |
| 42 | } __attribute__((aligned(1),packed)); |
| 43 | /* ISTR = 0 */ |
Jesper Juhl | 3c6bee1 | 2006-01-09 20:54:01 -0800 | [diff] [blame] | 44 | static const struct irq_pins irq_assign_table0[16]={ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | {H8300_GPIO_P5,H8300_GPIO_B0},{H8300_GPIO_P5,H8300_GPIO_B1}, |
| 46 | {H8300_GPIO_P5,H8300_GPIO_B2},{H8300_GPIO_P5,H8300_GPIO_B3}, |
| 47 | {H8300_GPIO_P5,H8300_GPIO_B4},{H8300_GPIO_P5,H8300_GPIO_B5}, |
| 48 | {H8300_GPIO_P5,H8300_GPIO_B6},{H8300_GPIO_P5,H8300_GPIO_B7}, |
| 49 | {H8300_GPIO_P6,H8300_GPIO_B0},{H8300_GPIO_P6,H8300_GPIO_B1}, |
| 50 | {H8300_GPIO_P6,H8300_GPIO_B2},{H8300_GPIO_P6,H8300_GPIO_B3}, |
| 51 | {H8300_GPIO_P6,H8300_GPIO_B4},{H8300_GPIO_P6,H8300_GPIO_B5}, |
| 52 | {H8300_GPIO_PF,H8300_GPIO_B1},{H8300_GPIO_PF,H8300_GPIO_B2}, |
Yoshinori Sato | 5cc265a | 2008-02-23 15:23:59 -0800 | [diff] [blame] | 53 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | /* ISTR = 1 */ |
Jesper Juhl | 3c6bee1 | 2006-01-09 20:54:01 -0800 | [diff] [blame] | 55 | static const struct irq_pins irq_assign_table1[16]={ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | {H8300_GPIO_P8,H8300_GPIO_B0},{H8300_GPIO_P8,H8300_GPIO_B1}, |
| 57 | {H8300_GPIO_P8,H8300_GPIO_B2},{H8300_GPIO_P8,H8300_GPIO_B3}, |
| 58 | {H8300_GPIO_P8,H8300_GPIO_B4},{H8300_GPIO_P8,H8300_GPIO_B5}, |
| 59 | {H8300_GPIO_PH,H8300_GPIO_B2},{H8300_GPIO_PH,H8300_GPIO_B3}, |
| 60 | {H8300_GPIO_P2,H8300_GPIO_B0},{H8300_GPIO_P2,H8300_GPIO_B1}, |
| 61 | {H8300_GPIO_P2,H8300_GPIO_B2},{H8300_GPIO_P2,H8300_GPIO_B3}, |
| 62 | {H8300_GPIO_P2,H8300_GPIO_B4},{H8300_GPIO_P2,H8300_GPIO_B5}, |
| 63 | {H8300_GPIO_P2,H8300_GPIO_B6},{H8300_GPIO_P2,H8300_GPIO_B7}, |
| 64 | }; |
| 65 | |
Simon Arlott | 5e71c60 | 2007-10-20 01:10:46 +0200 | [diff] [blame] | 66 | /* IRQ to GPIO pin translation */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #define IRQ_GPIO_MAP(irqbit,irq,port,bit) \ |
| 68 | do { \ |
| 69 | if (*(volatile unsigned short *)ITSR & irqbit) { \ |
| 70 | port = irq_assign_table1[irq - EXT_IRQ0].port_no; \ |
| 71 | bit = irq_assign_table1[irq - EXT_IRQ0].bit_no; \ |
| 72 | } else { \ |
| 73 | port = irq_assign_table0[irq - EXT_IRQ0].port_no; \ |
| 74 | bit = irq_assign_table0[irq - EXT_IRQ0].bit_no; \ |
| 75 | } \ |
| 76 | } while(0) |
| 77 | |
| 78 | int h8300_enable_irq_pin(unsigned int irq) |
| 79 | { |
| 80 | if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15) { |
| 81 | unsigned short ptn = 1 << (irq - EXT_IRQ0); |
| 82 | unsigned int port_no,bit_no; |
| 83 | IRQ_GPIO_MAP(ptn, irq, port_no, bit_no); |
| 84 | if (H8300_GPIO_RESERVE(port_no, bit_no) == 0) |
| 85 | return -EBUSY; /* pin already use */ |
| 86 | H8300_GPIO_DDR(port_no, bit_no, H8300_GPIO_INPUT); |
| 87 | *(volatile unsigned short *)ISR &= ~ptn; /* ISR clear */ |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
| 93 | void h8300_disable_irq_pin(unsigned int irq) |
| 94 | { |
| 95 | if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15) { |
| 96 | /* disable interrupt & release IRQ pin */ |
| 97 | unsigned short ptn = 1 << (irq - EXT_IRQ0); |
| 98 | unsigned short port_no,bit_no; |
| 99 | *(volatile unsigned short *)ISR &= ~ptn; |
| 100 | *(volatile unsigned short *)IER &= ~ptn; |
| 101 | IRQ_GPIO_MAP(ptn, irq, port_no, bit_no); |
| 102 | H8300_GPIO_FREE(port_no, bit_no); |
| 103 | } |
| 104 | } |