2 * cx18 interrupt handling
4 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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.
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.
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
22 #include "cx18-driver.h"
24 #include "cx18-firmware.h"
25 #include "cx18-fileops.h"
26 #include "cx18-queue.h"
28 #include "cx18-ioctl.h"
29 #include "cx18-mailbox.h"
34 void cx18_work_handler(struct work_struct *work)
36 struct cx18 *cx = container_of(work, struct cx18, work);
37 if (test_and_clear_bit(CX18_F_I_WORK_INITED, &cx->i_flags)) {
38 struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
39 /* This thread must use the FIFO scheduler as it
40 * is realtime sensitive. */
41 sched_setscheduler(current, SCHED_FIFO, ¶m);
43 if (test_and_clear_bit(CX18_F_I_WORK_HANDLER_DVB, &cx->i_flags))
44 cx18_dvb_work_handler(cx);
47 static void epu_dma_done(struct cx18 *cx, struct cx18_mailbox *mb)
49 u32 handle = mb->args[0];
50 struct cx18_stream *s = NULL;
51 struct cx18_buffer *buf;
56 for (i = 0; i < CX18_MAX_STREAMS; i++) {
58 if ((handle == s->handle) && (s->dvb.enabled))
60 if (s->v4l2dev && handle == s->handle)
63 if (i == CX18_MAX_STREAMS) {
64 CX18_WARN("Got DMA done notification for unknown/inactive"
65 " handle %d\n", handle);
66 mb->error = CXERR_NOT_OPEN;
74 CX18_WARN("Ack struct = %d for %s\n",
75 mb->args[2], s->name);
76 id = cx18_read_enc(cx, off);
77 buf = cx18_queue_get_buf_irq(s, id, cx18_read_enc(cx, off + 4));
78 CX18_DEBUG_HI_DMA("DMA DONE for %s (buffer %d)\n", s->name, id);
80 cx18_buf_sync_for_cpu(s, buf);
81 if (s->type == CX18_ENC_STREAM_TYPE_TS && s->dvb.enabled) {
82 CX18_DEBUG_HI_DMA("TS recv bytesused = %d\n",
85 set_bit(CX18_F_I_WORK_HANDLER_DVB, &cx->i_flags);
86 set_bit(CX18_F_I_HAVE_WORK, &cx->i_flags);
88 set_bit(CX18_F_B_NEED_BUF_SWAP, &buf->b_flags);
90 CX18_WARN("Could not find buf %d for stream %s\n",
91 cx18_read_enc(cx, off), s->name);
96 wake_up(&cx->dma_waitq);
101 static void epu_debug(struct cx18 *cx, struct cx18_mailbox *mb)
103 char str[256] = { 0 };
107 cx18_setup_page(cx, mb->args[1]);
108 cx18_memcpy_fromio(cx, str, cx->enc_mem + mb->args[1], 252);
112 CX18_DEBUG_INFO("%x %s\n", mb->args[0], str);
113 p = strchr(str, '.');
114 if (!test_bit(CX18_F_I_LOADED_FW, &cx->i_flags) && p && p > str)
115 CX18_INFO("FW version: %s\n", p - 1);
118 static void epu_cmd(struct cx18 *cx, u32 sw1)
120 struct cx18_mailbox mb;
122 if (sw1 & IRQ_CPU_TO_EPU) {
123 cx18_memcpy_fromio(cx, &mb, &cx->scb->cpu2epu_mb, sizeof(mb));
127 case CX18_EPU_DMA_DONE:
128 epu_dma_done(cx, &mb);
134 CX18_WARN("Unknown CPU_TO_EPU mailbox command %#08x\n",
140 if (sw1 & IRQ_APU_TO_EPU) {
141 cx18_memcpy_fromio(cx, &mb, &cx->scb->apu2epu_mb, sizeof(mb));
142 CX18_WARN("Unknown APU_TO_EPU mailbox command %#08x\n", mb.cmd);
145 if (sw1 & IRQ_HPU_TO_EPU) {
146 cx18_memcpy_fromio(cx, &mb, &cx->scb->hpu2epu_mb, sizeof(mb));
147 CX18_WARN("Unknown HPU_TO_EPU mailbox command %#08x\n", mb.cmd);
151 static void xpu_ack(struct cx18 *cx, u32 sw2)
153 if (sw2 & IRQ_CPU_TO_EPU_ACK)
154 wake_up(&cx->mb_cpu_waitq);
155 if (sw2 & IRQ_APU_TO_EPU_ACK)
156 wake_up(&cx->mb_apu_waitq);
157 if (sw2 & IRQ_HPU_TO_EPU_ACK)
158 wake_up(&cx->mb_hpu_waitq);
161 irqreturn_t cx18_irq_handler(int irq, void *dev_id)
163 struct cx18 *cx = (struct cx18 *)dev_id;
168 sw1_mask = cx18_read_reg(cx, SW1_INT_ENABLE_PCI);
169 sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & sw1_mask;
170 sw2_mask = cx18_read_reg(cx, SW2_INT_ENABLE_PCI);
171 sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & sw2_mask;
172 hw2_mask = cx18_read_reg(cx, HW2_INT_MASK5_PCI);
173 hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & hw2_mask;
176 cx18_write_reg_expect(cx, sw1, SW1_INT_STATUS, ~sw1, sw1);
178 cx18_write_reg_expect(cx, sw2, SW2_INT_STATUS, ~sw2, sw2);
180 cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2);
182 if (sw1 || sw2 || hw2)
183 CX18_DEBUG_HI_IRQ("SW1: %x SW2: %x HW2: %x\n", sw1, sw2, hw2);
185 /* To do: interrupt-based I2C handling
186 if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) {
196 if (test_and_clear_bit(CX18_F_I_HAVE_WORK, &cx->i_flags))
197 queue_work(cx->work_queue, &cx->work);
199 return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE;