git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c1e45d1 HV |
1 | /* |
| 2 | * cx18 interrupt handling | |
| 3 | * | |
| 4 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
| 6afdeaf8 | 5 | * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> |
| 1c1e45d1 HV |
6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License | |
| 18 | * along with this program; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 20 | * 02111-1307 USA | |
| 21 | */ | |
| 22 | ||
| 23 | #include "cx18-driver.h" | |
| b1526421 | 24 | #include "cx18-io.h" |
| 1c1e45d1 | 25 | #include "cx18-irq.h" |
| 1c1e45d1 | 26 | #include "cx18-mailbox.h" |
| 1c1e45d1 | 27 | #include "cx18-scb.h" |
| 465f8a80 AW |
28 | |
| 29 | static void xpu_ack(struct cx18 *cx, u32 sw2) | |
| 30 | { | |
| 31 | if (sw2 & IRQ_CPU_TO_EPU_ACK) | |
| 32 | wake_up(&cx->mb_cpu_waitq); | |
| 33 | if (sw2 & IRQ_APU_TO_EPU_ACK) | |
| 34 | wake_up(&cx->mb_apu_waitq); | |
| 1c1e45d1 HV |
35 | } |
| 36 | ||
| ee2d64f5 AW |
37 | static void epu_cmd(struct cx18 *cx, u32 sw1) |
| 38 | { | |
| 39 | if (sw1 & IRQ_CPU_TO_EPU) | |
| 40 | cx18_api_epu_cmd_irq(cx, CPU); | |
| 41 | if (sw1 & IRQ_APU_TO_EPU) | |
| 42 | cx18_api_epu_cmd_irq(cx, APU); | |
| 43 | } | |
| 44 | ||
| 1c1e45d1 HV |
45 | irqreturn_t cx18_irq_handler(int irq, void *dev_id) |
| 46 | { | |
| 47 | struct cx18 *cx = (struct cx18 *)dev_id; | |
| d6c7e5f8 | 48 | u32 sw1, sw2, hw2; |
| 1c1e45d1 | 49 | |
| d6c7e5f8 AW |
50 | sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & cx->sw1_irq_mask; |
| 51 | sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & cx->sw2_irq_mask; | |
| 52 | hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & cx->hw2_irq_mask; | |
| 1c1e45d1 | 53 | |
| f056d29e AW |
54 | if (sw1) |
| 55 | cx18_write_reg_expect(cx, sw1, SW1_INT_STATUS, ~sw1, sw1); | |
| 56 | if (sw2) | |
| 57 | cx18_write_reg_expect(cx, sw2, SW2_INT_STATUS, ~sw2, sw2); | |
| 58 | if (hw2) | |
| 59 | cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2); | |
| 1c1e45d1 HV |
60 | |
| 61 | if (sw1 || sw2 || hw2) | |
| ac504417 AW |
62 | CX18_DEBUG_HI_IRQ("received interrupts " |
| 63 | "SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2); | |
| 1c1e45d1 | 64 | |
| ee2d64f5 AW |
65 | /* |
| 66 | * SW1 responses have to happen first. The sending XPU times out the | |
| 67 | * incoming mailboxes on us rather rapidly. | |
| 68 | */ | |
| 69 | if (sw1) | |
| 70 | epu_cmd(cx, sw1); | |
| 71 | ||
| 1c1e45d1 | 72 | /* To do: interrupt-based I2C handling |
| 465f8a80 | 73 | if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) { |
| 1c1e45d1 HV |
74 | } |
| 75 | */ | |
| 76 | ||
| 465f8a80 AW |
77 | if (sw2) |
| 78 | xpu_ack(cx, sw2); | |
| 1c1e45d1 | 79 | |
| f056d29e | 80 | return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; |
| 1c1e45d1 | 81 | } |