1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * SMI PCIe driver for DVBSky cards. |
4 | * |
5 | * Copyright (C) 2014 Max nibble <nibble.max@gmail.com> |
6 | */ |
7 | |
8 | #include "smipcie.h" |
9 | |
10 | #define SMI_SAMPLE_PERIOD 83 |
11 | #define SMI_SAMPLE_IDLEMIN (10000 / SMI_SAMPLE_PERIOD) |
12 | |
13 | static void smi_ir_enableInterrupt(struct smi_rc *ir) |
14 | { |
15 | struct smi_dev *dev = ir->dev; |
16 | |
17 | smi_write(MSI_INT_ENA_SET, IR_X_INT); |
18 | } |
19 | |
20 | static void smi_ir_disableInterrupt(struct smi_rc *ir) |
21 | { |
22 | struct smi_dev *dev = ir->dev; |
23 | |
24 | smi_write(MSI_INT_ENA_CLR, IR_X_INT); |
25 | } |
26 | |
27 | static void smi_ir_clearInterrupt(struct smi_rc *ir) |
28 | { |
29 | struct smi_dev *dev = ir->dev; |
30 | |
31 | smi_write(MSI_INT_STATUS_CLR, IR_X_INT); |
32 | } |
33 | |
34 | static void smi_ir_stop(struct smi_rc *ir) |
35 | { |
36 | struct smi_dev *dev = ir->dev; |
37 | |
38 | smi_ir_disableInterrupt(ir); |
39 | smi_clear(IR_Init_Reg, rbIRen); |
40 | } |
41 | |
42 | static void smi_raw_process(struct rc_dev *rc_dev, const u8 *buffer, |
43 | const u8 length) |
44 | { |
45 | struct ir_raw_event rawir = {}; |
46 | int cnt; |
47 | |
48 | for (cnt = 0; cnt < length; cnt++) { |
49 | if (buffer[cnt] & 0x7f) { |
50 | rawir.pulse = (buffer[cnt] & 0x80) == 0; |
51 | rawir.duration = ((buffer[cnt] & 0x7f) + |
52 | (rawir.pulse ? 0 : -1)) * |
53 | rc_dev->rx_resolution; |
54 | ir_raw_event_store_with_filter(dev: rc_dev, ev: &rawir); |
55 | } |
56 | } |
57 | } |
58 | |
59 | static void smi_ir_decode(struct smi_rc *ir) |
60 | { |
61 | struct smi_dev *dev = ir->dev; |
62 | struct rc_dev *rc_dev = ir->rc_dev; |
63 | u32 control, data; |
64 | u8 index, ir_count, read_loop; |
65 | |
66 | control = smi_read(IR_Init_Reg); |
67 | |
68 | dev_dbg(&rc_dev->dev, "ircontrol: 0x%08x\n" , control); |
69 | |
70 | if (control & rbIRVld) { |
71 | ir_count = (u8)smi_read(IR_Data_Cnt); |
72 | |
73 | dev_dbg(&rc_dev->dev, "ircount %d\n" , ir_count); |
74 | |
75 | read_loop = ir_count / 4; |
76 | if (ir_count % 4) |
77 | read_loop += 1; |
78 | for (index = 0; index < read_loop; index++) { |
79 | data = smi_read(IR_DATA_BUFFER_BASE + (index * 4)); |
80 | dev_dbg(&rc_dev->dev, "IRData 0x%08x\n" , data); |
81 | |
82 | ir->irData[index * 4 + 0] = (u8)(data); |
83 | ir->irData[index * 4 + 1] = (u8)(data >> 8); |
84 | ir->irData[index * 4 + 2] = (u8)(data >> 16); |
85 | ir->irData[index * 4 + 3] = (u8)(data >> 24); |
86 | } |
87 | smi_raw_process(rc_dev, buffer: ir->irData, length: ir_count); |
88 | } |
89 | |
90 | if (control & rbIRhighidle) { |
91 | struct ir_raw_event rawir = {}; |
92 | |
93 | dev_dbg(&rc_dev->dev, "high idle\n" ); |
94 | |
95 | rawir.pulse = 0; |
96 | rawir.duration = SMI_SAMPLE_PERIOD * SMI_SAMPLE_IDLEMIN; |
97 | ir_raw_event_store_with_filter(dev: rc_dev, ev: &rawir); |
98 | } |
99 | |
100 | smi_set(IR_Init_Reg, rbIRVld); |
101 | ir_raw_event_handle(dev: rc_dev); |
102 | } |
103 | |
104 | /* ir functions call by main driver.*/ |
105 | int smi_ir_irq(struct smi_rc *ir, u32 int_status) |
106 | { |
107 | int handled = 0; |
108 | |
109 | if (int_status & IR_X_INT) { |
110 | smi_ir_disableInterrupt(ir); |
111 | smi_ir_clearInterrupt(ir); |
112 | smi_ir_decode(ir); |
113 | smi_ir_enableInterrupt(ir); |
114 | handled = 1; |
115 | } |
116 | return handled; |
117 | } |
118 | |
119 | void smi_ir_start(struct smi_rc *ir) |
120 | { |
121 | struct smi_dev *dev = ir->dev; |
122 | |
123 | smi_write(IR_Idle_Cnt_Low, |
124 | (((SMI_SAMPLE_PERIOD - 1) & 0xFFFF) << 16) | |
125 | (SMI_SAMPLE_IDLEMIN & 0xFFFF)); |
126 | msleep(msecs: 20); |
127 | smi_set(IR_Init_Reg, rbIRen | rbIRhighidle); |
128 | |
129 | smi_ir_enableInterrupt(ir); |
130 | } |
131 | |
132 | int smi_ir_init(struct smi_dev *dev) |
133 | { |
134 | int ret; |
135 | struct rc_dev *rc_dev; |
136 | struct smi_rc *ir = &dev->ir; |
137 | |
138 | rc_dev = rc_allocate_device(RC_DRIVER_IR_RAW); |
139 | if (!rc_dev) |
140 | return -ENOMEM; |
141 | |
142 | /* init input device */ |
143 | snprintf(buf: ir->device_name, size: sizeof(ir->device_name), fmt: "IR (%s)" , |
144 | dev->info->name); |
145 | snprintf(buf: ir->input_phys, size: sizeof(ir->input_phys), fmt: "pci-%s/ir0" , |
146 | pci_name(pdev: dev->pci_dev)); |
147 | |
148 | rc_dev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; |
149 | rc_dev->driver_name = "SMI_PCIe" ; |
150 | rc_dev->input_phys = ir->input_phys; |
151 | rc_dev->device_name = ir->device_name; |
152 | rc_dev->input_id.bustype = BUS_PCI; |
153 | rc_dev->input_id.version = 1; |
154 | rc_dev->input_id.vendor = dev->pci_dev->subsystem_vendor; |
155 | rc_dev->input_id.product = dev->pci_dev->subsystem_device; |
156 | rc_dev->dev.parent = &dev->pci_dev->dev; |
157 | |
158 | rc_dev->map_name = dev->info->rc_map; |
159 | rc_dev->timeout = SMI_SAMPLE_PERIOD * SMI_SAMPLE_IDLEMIN; |
160 | rc_dev->rx_resolution = SMI_SAMPLE_PERIOD; |
161 | |
162 | ir->rc_dev = rc_dev; |
163 | ir->dev = dev; |
164 | |
165 | smi_ir_disableInterrupt(ir); |
166 | |
167 | ret = rc_register_device(dev: rc_dev); |
168 | if (ret) |
169 | goto ir_err; |
170 | |
171 | return 0; |
172 | ir_err: |
173 | rc_free_device(dev: rc_dev); |
174 | return ret; |
175 | } |
176 | |
177 | void smi_ir_exit(struct smi_dev *dev) |
178 | { |
179 | struct smi_rc *ir = &dev->ir; |
180 | struct rc_dev *rc_dev = ir->rc_dev; |
181 | |
182 | rc_unregister_device(dev: rc_dev); |
183 | smi_ir_stop(ir); |
184 | ir->rc_dev = NULL; |
185 | } |
186 | |