1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Support for Intel Camera Imaging ISP subsystem.
4 * Copyright (c) 2015, Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 */
15
16 #include "platform_support.h"
17
18 #include "sh_css_hrt.h"
19 #include "ia_css_debug.h"
20
21 #include "device_access.h"
22
23 #define __INLINE_EVENT__
24 #include "event_fifo.h"
25 #define __INLINE_SP__
26 #include "sp.h"
27 #define __INLINE_ISP__
28 #include "isp.h"
29 #define __INLINE_IRQ__
30 #include "irq.h"
31 #define __INLINE_FIFO_MONITOR__
32 #include "fifo_monitor.h"
33
34 /* System independent */
35 #include "sh_css_internal.h"
36
sh_css_hrt_system_is_idle(void)37 bool sh_css_hrt_system_is_idle(void)
38 {
39 bool not_idle = false, idle;
40 fifo_channel_t ch;
41
42 idle = sp_ctrl_getbit(SP0_ID, SP_SC_REG, SP_IDLE_BIT);
43 not_idle |= !idle;
44 if (!idle)
45 IA_CSS_WARNING("SP not idle");
46
47 idle = isp_ctrl_getbit(ISP0_ID, ISP_SC_REG, ISP_IDLE_BIT);
48 not_idle |= !idle;
49 if (!idle)
50 IA_CSS_WARNING("ISP not idle");
51
52 for (ch = 0; ch < N_FIFO_CHANNEL; ch++) {
53 fifo_channel_state_t state;
54
55 fifo_channel_get_state(FIFO_MONITOR0_ID, ch, &state);
56 if (state.fifo_valid) {
57 IA_CSS_WARNING("FIFO channel %d is not empty", ch);
58 not_idle = true;
59 }
60 }
61
62 return !not_idle;
63 }
64
sh_css_hrt_sp_wait(void)65 int sh_css_hrt_sp_wait(void)
66 {
67 irq_sw_channel_id_t irq_id = IRQ_SW_CHANNEL0_ID;
68 /*
69 * Wait till SP is idle or till there is a SW2 interrupt
70 * The SW2 interrupt will be used when frameloop runs on SP
71 * and signals an event with similar meaning as SP idle
72 * (e.g. frame_done)
73 */
74 while (!sp_ctrl_getbit(SP0_ID, SP_SC_REG, SP_IDLE_BIT) &&
75 ((irq_reg_load(IRQ0_ID,
76 _HRT_IRQ_CONTROLLER_STATUS_REG_IDX) &
77 (1U << (irq_id + IRQ_SW_CHANNEL_OFFSET))) == 0)) {
78 udelay(1);
79 }
80
81 return 0;
82 }
83