1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * camss-csid-4-1.c
4 *
5 * Qualcomm MSM Camera Subsystem - CSID (CSI Decoder) Module
6 *
7 * Copyright (C) 2020 Linaro Ltd.
8 */
9
10 #include <linux/completion.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/kernel.h>
14 #include <linux/of.h>
15
16 #include "camss-csid.h"
17 #include "camss-csid-gen1.h"
18 #include "camss.h"
19
20 #define CAMSS_CSID_HW_VERSION 0x0
21 #define CAMSS_CSID_CORE_CTRL_0 0x004
22 #define CAMSS_CSID_CORE_CTRL_1 0x008
23 #define CAMSS_CSID_RST_CMD 0x00c
24 #define CAMSS_CSID_CID_LUT_VC_n(n) (0x010 + 0x4 * (n))
25 #define CAMSS_CSID_CID_n_CFG(n) (0x020 + 0x4 * (n))
26 #define CAMSS_CSID_CID_n_CFG_ISPIF_EN BIT(0)
27 #define CAMSS_CSID_CID_n_CFG_RDI_EN BIT(1)
28 #define CAMSS_CSID_CID_n_CFG_DECODE_FORMAT_SHIFT 4
29 #define CAMSS_CSID_CID_n_CFG_PLAIN_FORMAT_8 (PLAIN_FORMAT_PLAIN8 << 8)
30 #define CAMSS_CSID_CID_n_CFG_PLAIN_FORMAT_16 (PLAIN_FORMAT_PLAIN16 << 8)
31 #define CAMSS_CSID_CID_n_CFG_PLAIN_ALIGNMENT_LSB (0 << 9)
32 #define CAMSS_CSID_CID_n_CFG_PLAIN_ALIGNMENT_MSB (1 << 9)
33 #define CAMSS_CSID_CID_n_CFG_RDI_MODE_RAW_DUMP (0 << 10)
34 #define CAMSS_CSID_CID_n_CFG_RDI_MODE_PLAIN_PACKING (1 << 10)
35 #define CAMSS_CSID_IRQ_CLEAR_CMD 0x060
36 #define CAMSS_CSID_IRQ_MASK 0x064
37 #define CAMSS_CSID_IRQ_STATUS 0x068
38 #define CAMSS_CSID_TG_CTRL 0x0a0
39 #define CAMSS_CSID_TG_CTRL_DISABLE 0xa06436
40 #define CAMSS_CSID_TG_CTRL_ENABLE 0xa06437
41 #define CAMSS_CSID_TG_VC_CFG 0x0a4
42 #define CAMSS_CSID_TG_VC_CFG_H_BLANKING 0x3ff
43 #define CAMSS_CSID_TG_VC_CFG_V_BLANKING 0x7f
44 #define CAMSS_CSID_TG_DT_n_CGG_0(n) (0x0ac + 0xc * (n))
45 #define CAMSS_CSID_TG_DT_n_CGG_1(n) (0x0b0 + 0xc * (n))
46 #define CAMSS_CSID_TG_DT_n_CGG_2(n) (0x0b4 + 0xc * (n))
47
csid_configure_stream(struct csid_device * csid,u8 enable)48 static void csid_configure_stream(struct csid_device *csid, u8 enable)
49 {
50 struct csid_testgen_config *tg = &csid->testgen;
51 u32 val;
52
53 if (enable) {
54 struct v4l2_mbus_framefmt *input_format;
55 const struct csid_format_info *format;
56 u8 vc = 0; /* Virtual Channel 0 */
57 u8 cid = vc * 4; /* id of Virtual Channel and Data Type set */
58 u8 dt_shift;
59
60 if (tg->enabled) {
61 /* Config Test Generator */
62 u32 num_lines, num_bytes_per_line;
63
64 input_format = &csid->fmt[MSM_CSID_PAD_SRC];
65 format = csid_get_fmt_entry(csid->res->formats->formats,
66 csid->res->formats->nformats,
67 input_format->code);
68 num_bytes_per_line = input_format->width * format->bpp * format->spp / 8;
69 num_lines = input_format->height;
70
71 /* 31:24 V blank, 23:13 H blank, 3:2 num of active DT */
72 /* 1:0 VC */
73 val = ((CAMSS_CSID_TG_VC_CFG_V_BLANKING & 0xff) << 24) |
74 ((CAMSS_CSID_TG_VC_CFG_H_BLANKING & 0x7ff) << 13);
75 writel_relaxed(val, csid->base + CAMSS_CSID_TG_VC_CFG);
76
77 /* 28:16 bytes per lines, 12:0 num of lines */
78 val = ((num_bytes_per_line & 0x1fff) << 16) |
79 (num_lines & 0x1fff);
80 writel_relaxed(val, csid->base + CAMSS_CSID_TG_DT_n_CGG_0(0));
81
82 /* 5:0 data type */
83 val = format->data_type;
84 writel_relaxed(val, csid->base + CAMSS_CSID_TG_DT_n_CGG_1(0));
85
86 /* 2:0 output test pattern */
87 val = tg->mode - 1;
88 writel_relaxed(val, csid->base + CAMSS_CSID_TG_DT_n_CGG_2(0));
89 } else {
90 struct csid_phy_config *phy = &csid->phy;
91
92 input_format = &csid->fmt[MSM_CSID_PAD_SINK];
93 format = csid_get_fmt_entry(csid->res->formats->formats,
94 csid->res->formats->nformats,
95 input_format->code);
96
97 val = phy->lane_cnt - 1;
98 val |= phy->lane_assign << 4;
99
100 writel_relaxed(val, csid->base + CAMSS_CSID_CORE_CTRL_0);
101
102 val = phy->csiphy_id << 17;
103 val |= 0x9;
104
105 writel_relaxed(val, csid->base + CAMSS_CSID_CORE_CTRL_1);
106 }
107
108 /* Config LUT */
109
110 dt_shift = (cid % 4) * 8;
111 val = readl_relaxed(csid->base + CAMSS_CSID_CID_LUT_VC_n(vc));
112 val &= ~(0xff << dt_shift);
113 val |= format->data_type << dt_shift;
114 writel_relaxed(val, csid->base + CAMSS_CSID_CID_LUT_VC_n(vc));
115
116 val = CAMSS_CSID_CID_n_CFG_ISPIF_EN;
117 val |= CAMSS_CSID_CID_n_CFG_RDI_EN;
118 val |= format->decode_format << CAMSS_CSID_CID_n_CFG_DECODE_FORMAT_SHIFT;
119 val |= CAMSS_CSID_CID_n_CFG_RDI_MODE_RAW_DUMP;
120 writel_relaxed(val, csid->base + CAMSS_CSID_CID_n_CFG(cid));
121
122 if (tg->enabled) {
123 val = CAMSS_CSID_TG_CTRL_ENABLE;
124 writel_relaxed(val, csid->base + CAMSS_CSID_TG_CTRL);
125 }
126 } else {
127 if (tg->enabled) {
128 val = CAMSS_CSID_TG_CTRL_DISABLE;
129 writel_relaxed(val, csid->base + CAMSS_CSID_TG_CTRL);
130 }
131 }
132 }
133
csid_configure_testgen_pattern(struct csid_device * csid,s32 val)134 static int csid_configure_testgen_pattern(struct csid_device *csid, s32 val)
135 {
136 if (val > 0 && val <= csid->testgen.nmodes)
137 csid->testgen.mode = val;
138
139 return 0;
140 }
141
csid_hw_version(struct csid_device * csid)142 static u32 csid_hw_version(struct csid_device *csid)
143 {
144 u32 hw_version = readl_relaxed(csid->base + CAMSS_CSID_HW_VERSION);
145
146 dev_dbg(csid->camss->dev, "CSID HW Version = 0x%08x\n", hw_version);
147
148 return hw_version;
149 }
150
csid_isr(int irq,void * dev)151 static irqreturn_t csid_isr(int irq, void *dev)
152 {
153 struct csid_device *csid = dev;
154 u32 value;
155
156 value = readl_relaxed(csid->base + CAMSS_CSID_IRQ_STATUS);
157 writel_relaxed(value, csid->base + CAMSS_CSID_IRQ_CLEAR_CMD);
158
159 if ((value >> 11) & 0x1)
160 complete(&csid->reset_complete);
161
162 return IRQ_HANDLED;
163 }
164
csid_reset(struct csid_device * csid)165 static int csid_reset(struct csid_device *csid)
166 {
167 unsigned long time;
168
169 reinit_completion(&csid->reset_complete);
170
171 writel_relaxed(0x7fff, csid->base + CAMSS_CSID_RST_CMD);
172
173 time = wait_for_completion_timeout(&csid->reset_complete,
174 msecs_to_jiffies(CSID_RESET_TIMEOUT_MS));
175 if (!time) {
176 dev_err(csid->camss->dev, "CSID reset timeout\n");
177 return -EIO;
178 }
179
180 return 0;
181 }
182
csid_src_pad_code(struct csid_device * csid,u32 sink_code,unsigned int match_format_idx,u32 match_code)183 static u32 csid_src_pad_code(struct csid_device *csid, u32 sink_code,
184 unsigned int match_format_idx, u32 match_code)
185 {
186 if (match_format_idx > 0)
187 return 0;
188
189 return sink_code;
190 }
191
csid_subdev_init(struct csid_device * csid)192 static void csid_subdev_init(struct csid_device *csid)
193 {
194 csid->testgen.modes = csid_testgen_modes;
195 csid->testgen.nmodes = CSID_PAYLOAD_MODE_NUM_SUPPORTED_GEN1;
196 }
197
198 const struct csid_hw_ops csid_ops_4_1 = {
199 .configure_stream = csid_configure_stream,
200 .configure_testgen_pattern = csid_configure_testgen_pattern,
201 .hw_version = csid_hw_version,
202 .isr = csid_isr,
203 .reset = csid_reset,
204 .src_pad_code = csid_src_pad_code,
205 .subdev_init = csid_subdev_init,
206 };
207