projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c1e45d1 HV |
1 | /* |
| 2 | * cx18 interrupt handling | |
| 3 | * | |
| 4 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | * | |
| 11 | * This program is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | * GNU General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 19 | * 02111-1307 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include "cx18-driver.h" | |
| b1526421 | 23 | #include "cx18-io.h" |
| 1c1e45d1 | 24 | #include "cx18-irq.h" |
| 1c1e45d1 | 25 | #include "cx18-mailbox.h" |
| 1c1e45d1 | 26 | #include "cx18-scb.h" |
| 465f8a80 AW |
27 | |
| 28 | static void xpu_ack(struct cx18 *cx, u32 sw2) | |
| 29 | { | |
| 30 | if (sw2 & IRQ_CPU_TO_EPU_ACK) | |
| 31 | wake_up(&cx->mb_cpu_waitq); | |
| 32 | if (sw2 & IRQ_APU_TO_EPU_ACK) | |
| 33 | wake_up(&cx->mb_apu_waitq); | |
| 1c1e45d1 HV |
34 | } |
| 35 | ||
| ee2d64f5 AW |
36 | static void epu_cmd(struct cx18 *cx, u32 sw1) |
| 37 | { | |
| 38 | if (sw1 & IRQ_CPU_TO_EPU) | |
| 39 | cx18_api_epu_cmd_irq(cx, CPU); | |
| 40 | if (sw1 & IRQ_APU_TO_EPU) | |
| 41 | cx18_api_epu_cmd_irq(cx, APU); | |
| 42 | } | |
| 43 | ||
| 1c1e45d1 HV |
44 | irqreturn_t cx18_irq_handler(int irq, void *dev_id) |
| 45 | { | |
| 46 | struct cx18 *cx = (struct cx18 *)dev_id; | |
| 47 | u32 sw1, sw1_mask; | |
| 48 | u32 sw2, sw2_mask; | |
| 49 | u32 hw2, hw2_mask; | |
| 50 | ||
| 465f8a80 | 51 | sw1_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI); |
| b1526421 | 52 | sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & sw1_mask; |
| 465f8a80 | 53 | sw2_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI); |
| f056d29e AW |
54 | sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & sw2_mask; |
| 55 | hw2_mask = cx18_read_reg(cx, HW2_INT_MASK5_PCI); | |
| 56 | hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & hw2_mask; | |
| 1c1e45d1 | 57 | |
| f056d29e AW |
58 | if (sw1) |
| 59 | cx18_write_reg_expect(cx, sw1, SW1_INT_STATUS, ~sw1, sw1); | |
| 60 | if (sw2) | |
| 61 | cx18_write_reg_expect(cx, sw2, SW2_INT_STATUS, ~sw2, sw2); | |
| 62 | if (hw2) | |
| 63 | cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2); | |
| 1c1e45d1 HV |
64 | |
| 65 | if (sw1 || sw2 || hw2) | |
| ac504417 AW |
66 | CX18_DEBUG_HI_IRQ("received interrupts " |
| 67 | "SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2); | |
| 1c1e45d1 | 68 | |
| ee2d64f5 AW |
69 | /* |
| 70 | * SW1 responses have to happen first. The sending XPU times out the | |
| 71 | * incoming mailboxes on us rather rapidly. | |
| 72 | */ | |
| 73 | if (sw1) | |
| 74 | epu_cmd(cx, sw1); | |
| 75 | ||
| 1c1e45d1 | 76 | /* To do: interrupt-based I2C handling |
| 465f8a80 | 77 | if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) { |
| 1c1e45d1 HV |
78 | } |
| 79 | */ | |
| 80 | ||
| 465f8a80 AW |
81 | if (sw2) |
| 82 | xpu_ack(cx, sw2); | |
| 1c1e45d1 | 83 | |
| f056d29e | 84 | return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE; |
| 1c1e45d1 | 85 | } |