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9ea53b74 ML |
1 | /* |
2 | * driver for ENE KB3926 B/C/D CIR (also known as ENE0100/ENE0200/ENE0201) | |
3 | * | |
4 | * Copyright (C) 2010 Maxim Levitsky <maximlevitsky@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation; either version 2 of the | |
9 | * License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * 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 02111-1307 | |
19 | * USA | |
20 | */ | |
21 | #include <linux/spinlock.h> | |
22 | #include <media/lirc.h> | |
23 | #include <media/lirc_dev.h> | |
24 | ||
25 | /* hardware address */ | |
26 | #define ENE_STATUS 0 /* hardware status - unused */ | |
27 | #define ENE_ADDR_HI 1 /* hi byte of register address */ | |
28 | #define ENE_ADDR_LO 2 /* low byte of register address */ | |
29 | #define ENE_IO 3 /* read/write window */ | |
30 | #define ENE_MAX_IO 4 | |
31 | ||
32 | /* 8 bytes of samples, divided in 2 halfs*/ | |
33 | #define ENE_SAMPLE_BUFFER 0xF8F0 /* regular sample buffer */ | |
34 | #define ENE_SAMPLE_SPC_MASK 0x80 /* sample is space */ | |
35 | #define ENE_SAMPLE_VALUE_MASK 0x7F | |
36 | #define ENE_SAMPLE_OVERFLOW 0x7F | |
37 | #define ENE_SAMPLES_SIZE 4 | |
38 | ||
39 | /* fan input sample buffer */ | |
40 | #define ENE_SAMPLE_BUFFER_FAN 0xF8FB /* this buffer holds high byte of */ | |
41 | /* each sample of normal buffer */ | |
42 | #define ENE_FAN_SMPL_PULS_MSK 0x8000 /* this bit of combined sample */ | |
43 | /* if set, says that sample is pulse */ | |
44 | #define ENE_FAN_VALUE_MASK 0x0FFF /* mask for valid bits of the value */ | |
45 | ||
46 | /* first firmware register */ | |
47 | #define ENE_FW1 0xF8F8 | |
48 | #define ENE_FW1_ENABLE 0x01 /* enable fw processing */ | |
49 | #define ENE_FW1_TXIRQ 0x02 /* TX interrupt pending */ | |
50 | #define ENE_FW1_WAKE 0x40 /* enable wake from S3 */ | |
51 | #define ENE_FW1_IRQ 0x80 /* enable interrupt */ | |
52 | ||
53 | /* second firmware register */ | |
54 | #define ENE_FW2 0xF8F9 | |
55 | #define ENE_FW2_BUF_HIGH 0x01 /* which half of the buffer to read */ | |
56 | #define ENE_FW2_IRQ_CLR 0x04 /* clear this on IRQ */ | |
57 | #define ENE_FW2_GP40_AS_LEARN 0x08 /* normal input is used as */ | |
58 | /* learning input */ | |
59 | #define ENE_FW2_FAN_AS_NRML_IN 0x40 /* fan is used as normal input */ | |
60 | #define ENE_FW2_LEARNING 0x80 /* hardware supports learning and TX */ | |
61 | ||
62 | /* transmitter ports */ | |
63 | #define ENE_TX_PORT2 0xFC01 /* this enables one or both */ | |
64 | #define ENE_TX_PORT2_EN 0x20 /* TX ports */ | |
65 | #define ENE_TX_PORT1 0xFC08 | |
66 | #define ENE_TX_PORT1_EN 0x02 | |
67 | ||
68 | /* IRQ registers block (for revision B) */ | |
69 | #define ENEB_IRQ 0xFD09 /* IRQ number */ | |
70 | #define ENEB_IRQ_UNK1 0xFD17 /* unknown setting = 1 */ | |
71 | #define ENEB_IRQ_STATUS 0xFD80 /* irq status */ | |
72 | #define ENEB_IRQ_STATUS_IR 0x20 /* IR irq */ | |
73 | ||
74 | /* fan as input settings - only if learning capable */ | |
75 | #define ENE_FAN_AS_IN1 0xFE30 /* fan init reg 1 */ | |
76 | #define ENE_FAN_AS_IN1_EN 0xCD | |
77 | #define ENE_FAN_AS_IN2 0xFE31 /* fan init reg 2 */ | |
78 | #define ENE_FAN_AS_IN2_EN 0x03 | |
79 | #define ENE_SAMPLE_PERIOD_FAN 61 /* fan input has fixed sample period */ | |
80 | ||
81 | /* IRQ registers block (for revision C,D) */ | |
82 | #define ENEC_IRQ 0xFE9B /* new irq settings register */ | |
83 | #define ENEC_IRQ_MASK 0x0F /* irq number mask */ | |
84 | #define ENEC_IRQ_UNK_EN 0x10 /* always enabled */ | |
85 | #define ENEC_IRQ_STATUS 0x20 /* irq status and ACK */ | |
86 | ||
87 | /* CIR block settings */ | |
88 | #define ENE_CIR_CONF1 0xFEC0 | |
89 | #define ENE_CIR_CONF1_TX_CLEAR 0x01 /* clear that on revC */ | |
90 | /* while transmitting */ | |
91 | #define ENE_CIR_CONF1_RX_ON 0x07 /* normal reciever enabled */ | |
92 | #define ENE_CIR_CONF1_LEARN1 0x08 /* enabled on learning mode */ | |
93 | #define ENE_CIR_CONF1_TX_ON 0x30 /* enabled on transmit */ | |
94 | #define ENE_CIR_CONF1_TX_CARR 0x80 /* send TX carrier or not */ | |
95 | ||
96 | #define ENE_CIR_CONF2 0xFEC1 /* unknown setting = 0 */ | |
97 | #define ENE_CIR_CONF2_LEARN2 0x10 /* set on enable learning */ | |
98 | #define ENE_CIR_CONF2_GPIO40DIS 0x20 /* disable input via gpio40 */ | |
99 | ||
100 | #define ENE_CIR_SAMPLE_PERIOD 0xFEC8 /* sample period in us */ | |
101 | #define ENE_CIR_SAMPLE_OVERFLOW 0x80 /* interrupt on overflows if set */ | |
102 | ||
103 | ||
104 | /* Two byte tx buffer */ | |
105 | #define ENE_TX_INPUT1 0xFEC9 | |
106 | #define ENE_TX_INPUT2 0xFECA | |
107 | #define ENE_TX_PULSE_MASK 0x80 /* Transmitted sample is pulse */ | |
108 | #define ENE_TX_SMLP_MASK 0x7F | |
109 | #define ENE_TX_SMPL_PERIOD 50 /* transmit sample period - fixed */ | |
110 | ||
111 | ||
112 | /* Unknown TX setting - TX sample period ??? */ | |
113 | #define ENE_TX_UNK1 0xFECB /* set to 0x63 */ | |
114 | ||
115 | /* Current recieved carrier period */ | |
116 | #define ENE_RX_CARRIER 0xFECC /* RX period (500 ns) */ | |
117 | #define ENE_RX_CARRIER_VALID 0x80 /* Register content valid */ | |
118 | ||
119 | ||
120 | /* TX period (1/carrier) */ | |
121 | #define ENE_TX_PERIOD 0xFECE /* TX period (500 ns) */ | |
122 | #define ENE_TX_PERIOD_UNKBIT 0x80 /* This bit set on transmit*/ | |
123 | #define ENE_TX_PERIOD_PULSE 0xFECF /* TX pulse period (500 ns)*/ | |
124 | ||
125 | /* Hardware versions */ | |
126 | #define ENE_HW_VERSION 0xFF00 /* hardware revision */ | |
127 | #define ENE_HW_UNK 0xFF1D | |
128 | #define ENE_HW_UNK_CLR 0x04 | |
129 | #define ENE_HW_VER_MAJOR 0xFF1E /* chip version */ | |
130 | #define ENE_HW_VER_MINOR 0xFF1F | |
131 | #define ENE_HW_VER_OLD 0xFD00 | |
132 | ||
133 | /* Normal/Learning carrier ranges - only valid if we have learning input*/ | |
134 | /* TODO: test */ | |
135 | #define ENE_NORMAL_RX_LOW 34 | |
136 | #define ENE_NORMAL_RX_HI 38 | |
137 | ||
138 | /* Tx carrier range */ | |
139 | /* Hardware might be able to do more, but this range is enough for | |
140 | all purposes */ | |
141 | #define ENE_TX_PERIOD_MAX 32 /* corresponds to 29.4 kHz */ | |
142 | #define ENE_TX_PERIOD_MIN 16 /* corrsponds to 62.5 kHz */ | |
143 | ||
144 | ||
145 | ||
146 | /* Minimal and maximal gaps */ | |
147 | ||
148 | /* Normal case: | |
149 | Minimal gap is 0x7F * sample period | |
150 | Maximum gap depends on hardware. | |
151 | For KB3926B, it is unlimited, for newer models its around | |
152 | 250000, after which HW stops sending samples, and that is | |
153 | not possible to change */ | |
154 | ||
155 | /* Fan case: | |
156 | Both minimal and maximal gaps are same, and equal to 0xFFF * 0x61 | |
157 | And there is nothing to change this setting | |
158 | */ | |
159 | ||
160 | #define ENE_MAXGAP 250000 | |
161 | #define ENE_MINGAP (127 * sample_period) | |
162 | ||
163 | /******************************************************************************/ | |
164 | ||
165 | #define ENE_DRIVER_NAME "enecir" | |
166 | #define ENE_TXBUF_SIZE (500 * sizeof(int)) /* 500 samples (arbitary) */ | |
167 | ||
168 | #define ENE_IRQ_RX 1 | |
169 | #define ENE_IRQ_TX 2 | |
170 | ||
171 | #define ENE_HW_B 1 /* 3926B */ | |
172 | #define ENE_HW_C 2 /* 3926C */ | |
173 | #define ENE_HW_D 3 /* 3926D */ | |
174 | ||
175 | #define ene_printk(level, text, ...) \ | |
176 | printk(level ENE_DRIVER_NAME ": " text, ## __VA_ARGS__) | |
177 | ||
178 | #define ene_dbg(text, ...) \ | |
179 | if (debug) \ | |
180 | printk(KERN_DEBUG \ | |
181 | ENE_DRIVER_NAME ": " text "\n" , ## __VA_ARGS__) | |
182 | ||
183 | #define ene_dbg_verbose(text, ...) \ | |
184 | if (debug > 1) \ | |
185 | printk(KERN_DEBUG \ | |
186 | ENE_DRIVER_NAME ": " text "\n" , ## __VA_ARGS__) | |
187 | ||
188 | ||
189 | struct ene_device { | |
190 | struct pnp_dev *pnp_dev; | |
191 | struct lirc_driver *lirc_driver; | |
192 | int in_use; | |
193 | ||
194 | /* hw IO settings */ | |
195 | unsigned long hw_io; | |
196 | int irq; | |
197 | spinlock_t hw_lock; | |
198 | ||
199 | /* HW features */ | |
200 | int hw_revision; /* hardware revision */ | |
201 | int hw_learning_and_tx_capable; /* learning capable */ | |
202 | int hw_gpio40_learning; /* gpio40 is learning */ | |
203 | int hw_fan_as_normal_input; /* fan input is used as */ | |
204 | /* regular input */ | |
205 | /* HW state*/ | |
206 | int rx_pointer; /* hw pointer to rx buffer */ | |
207 | int rx_fan_input_inuse; /* is fan input in use for rx*/ | |
208 | int tx_reg; /* current reg used for TX */ | |
209 | u8 saved_conf1; /* saved FEC0 reg */ | |
210 | int learning_enabled; /* learning input enabled */ | |
211 | ||
212 | /* RX sample handling */ | |
213 | int rx_sample; /* current recieved sample */ | |
214 | int rx_sample_pulse; /* recieved sample is pulse */ | |
215 | int rx_idle; /* idle mode for RX activated */ | |
216 | struct timeval rx_gap_start; /* time of start of idle */ | |
217 | int rx_timeout; /* time in ms of RX timeout */ | |
218 | int rx_send_timeout_packet; /* do we send RX timeout */ | |
219 | int rx_timeout_sent; /* we sent the timeout packet */ | |
220 | int rx_carrier_sense; /* sense carrier */ | |
221 | ||
222 | /* TX sample handling */ | |
223 | unsigned int tx_sample; /* current sample for TX */ | |
224 | int tx_sample_pulse; /* current sample is pulse */ | |
225 | ||
226 | /* TX buffer */ | |
227 | int tx_buffer[ENE_TXBUF_SIZE]; /* input samples buffer*/ | |
228 | int tx_pos; /* position in that bufer */ | |
229 | int tx_len; /* current len of tx buffer */ | |
230 | int tx_underway; /* TX is under way*/ | |
231 | int tx_done; /* done transmitting */ | |
232 | /* one more sample pending*/ | |
233 | struct completion tx_complete; /* TX completion */ | |
234 | struct timer_list tx_sim_timer; | |
235 | ||
236 | /*TX settings */ | |
237 | int tx_period; | |
238 | int tx_duty_cycle; | |
239 | int transmitter_mask; | |
240 | }; |