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Commit | Line | Data |
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1c1e45d1 HV |
1 | /* |
2 | * cx18 I2C functions | |
3 | * | |
4 | * Derived from ivtv-i2c.c | |
5 | * | |
6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
1ed9dcc8 | 7 | * Copyright (C) 2008 Andy Walls <awalls@radix.net> |
1c1e45d1 HV |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
22 | * 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include "cx18-driver.h" | |
b1526421 | 26 | #include "cx18-io.h" |
1c1e45d1 HV |
27 | #include "cx18-cards.h" |
28 | #include "cx18-gpio.h" | |
50510993 | 29 | #include "cx18-i2c.h" |
ced07371 | 30 | #include "cx18-irq.h" |
1c1e45d1 | 31 | |
1c1e45d1 HV |
32 | #define CX18_REG_I2C_1_WR 0xf15000 |
33 | #define CX18_REG_I2C_1_RD 0xf15008 | |
34 | #define CX18_REG_I2C_2_WR 0xf25100 | |
35 | #define CX18_REG_I2C_2_RD 0xf25108 | |
36 | ||
37 | #define SETSCL_BIT 0x0001 | |
38 | #define SETSDL_BIT 0x0002 | |
39 | #define GETSCL_BIT 0x0004 | |
40 | #define GETSDL_BIT 0x0008 | |
41 | ||
1c1e45d1 HV |
42 | #define CX18_CS5345_I2C_ADDR 0x4c |
43 | ||
1c1e45d1 HV |
44 | /* This array should match the CX18_HW_ defines */ |
45 | static const u8 hw_addrs[] = { | |
ff2a2001 AW |
46 | 0, /* CX18_HW_TUNER */ |
47 | 0, /* CX18_HW_TVEEPROM */ | |
48 | CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */ | |
49 | 0, /* CX18_HW_DVB */ | |
50 | 0, /* CX18_HW_418_AV */ | |
eefe1010 AW |
51 | 0, /* CX18_HW_GPIO_MUX */ |
52 | 0, /* CX18_HW_GPIO_RESET_CTRL */ | |
1c1e45d1 HV |
53 | }; |
54 | ||
55 | /* This array should match the CX18_HW_ defines */ | |
56 | /* This might well become a card-specific array */ | |
57 | static const u8 hw_bus[] = { | |
ff2a2001 AW |
58 | 1, /* CX18_HW_TUNER */ |
59 | 0, /* CX18_HW_TVEEPROM */ | |
60 | 0, /* CX18_HW_CS5345 */ | |
61 | 0, /* CX18_HW_DVB */ | |
62 | 0, /* CX18_HW_418_AV */ | |
eefe1010 AW |
63 | 0, /* CX18_HW_GPIO_MUX */ |
64 | 0, /* CX18_HW_GPIO_RESET_CTRL */ | |
ff2a2001 AW |
65 | }; |
66 | ||
67 | /* This array should match the CX18_HW_ defines */ | |
68 | static const char * const hw_modules[] = { | |
69 | "tuner", /* CX18_HW_TUNER */ | |
70 | NULL, /* CX18_HW_TVEEPROM */ | |
71 | "cs5345", /* CX18_HW_CS5345 */ | |
72 | NULL, /* CX18_HW_DVB */ | |
73 | NULL, /* CX18_HW_418_AV */ | |
eefe1010 AW |
74 | NULL, /* CX18_HW_GPIO_MUX */ |
75 | NULL, /* CX18_HW_GPIO_RESET_CTRL */ | |
1c1e45d1 HV |
76 | }; |
77 | ||
78 | /* This array should match the CX18_HW_ defines */ | |
af294867 | 79 | static const char * const hw_devicenames[] = { |
1c1e45d1 HV |
80 | "tuner", |
81 | "tveeprom", | |
82 | "cs5345", | |
ff2a2001 AW |
83 | "cx23418_DTV", |
84 | "cx23418_AV", | |
eefe1010 AW |
85 | "gpio_mux", |
86 | "gpio_reset_ctrl", | |
1c1e45d1 HV |
87 | }; |
88 | ||
89 | int cx18_i2c_register(struct cx18 *cx, unsigned idx) | |
90 | { | |
ff2a2001 AW |
91 | struct v4l2_subdev *sd; |
92 | int bus = hw_bus[idx]; | |
93 | struct i2c_adapter *adap = &cx->i2c_adap[bus]; | |
94 | const char *mod = hw_modules[idx]; | |
95 | const char *type = hw_devicenames[idx]; | |
96 | u32 hw = 1 << idx; | |
97 | ||
98 | if (idx >= ARRAY_SIZE(hw_addrs)) | |
1c1e45d1 | 99 | return -1; |
1c1e45d1 | 100 | |
ff2a2001 AW |
101 | if (hw == CX18_HW_TUNER) { |
102 | /* special tuner group handling */ | |
e6574f2f HV |
103 | sd = v4l2_i2c_new_probed_subdev(&cx->v4l2_dev, |
104 | adap, mod, type, cx->card_i2c->radio); | |
ff2a2001 AW |
105 | if (sd != NULL) |
106 | sd->grp_id = hw; | |
e6574f2f HV |
107 | sd = v4l2_i2c_new_probed_subdev(&cx->v4l2_dev, |
108 | adap, mod, type, cx->card_i2c->demod); | |
ff2a2001 AW |
109 | if (sd != NULL) |
110 | sd->grp_id = hw; | |
e6574f2f HV |
111 | sd = v4l2_i2c_new_probed_subdev(&cx->v4l2_dev, |
112 | adap, mod, type, cx->card_i2c->tv); | |
ff2a2001 AW |
113 | if (sd != NULL) |
114 | sd->grp_id = hw; | |
115 | return sd != NULL ? 0 : -1; | |
1c1e45d1 HV |
116 | } |
117 | ||
ff2a2001 AW |
118 | /* Is it not an I2C device or one we do not wish to register? */ |
119 | if (!hw_addrs[idx]) | |
120 | return -1; | |
1c1e45d1 | 121 | |
ff2a2001 | 122 | /* It's an I2C device other than an analog tuner */ |
e6574f2f | 123 | sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, mod, type, hw_addrs[idx]); |
ff2a2001 AW |
124 | if (sd != NULL) |
125 | sd->grp_id = hw; | |
126 | return sd != NULL ? 0 : -1; | |
1c1e45d1 HV |
127 | } |
128 | ||
ff2a2001 AW |
129 | /* Find the first member of the subdev group id in hw */ |
130 | struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) | |
1c1e45d1 | 131 | { |
ff2a2001 AW |
132 | struct v4l2_subdev *result = NULL; |
133 | struct v4l2_subdev *sd; | |
1c1e45d1 | 134 | |
ff2a2001 AW |
135 | spin_lock(&cx->v4l2_dev.lock); |
136 | v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { | |
137 | if (sd->grp_id == hw) { | |
138 | result = sd; | |
1c1e45d1 HV |
139 | break; |
140 | } | |
141 | } | |
ff2a2001 AW |
142 | spin_unlock(&cx->v4l2_dev.lock); |
143 | return result; | |
1c1e45d1 HV |
144 | } |
145 | ||
146 | static void cx18_setscl(void *data, int state) | |
147 | { | |
148 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
149 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
150 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; | |
b1526421 | 151 | u32 r = cx18_read_reg(cx, addr); |
1c1e45d1 HV |
152 | |
153 | if (state) | |
3f75c616 | 154 | cx18_write_reg(cx, r | SETSCL_BIT, addr); |
1c1e45d1 | 155 | else |
3f75c616 | 156 | cx18_write_reg(cx, r & ~SETSCL_BIT, addr); |
1c1e45d1 HV |
157 | } |
158 | ||
159 | static void cx18_setsda(void *data, int state) | |
160 | { | |
161 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
162 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
163 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; | |
b1526421 | 164 | u32 r = cx18_read_reg(cx, addr); |
1c1e45d1 HV |
165 | |
166 | if (state) | |
3f75c616 | 167 | cx18_write_reg(cx, r | SETSDL_BIT, addr); |
1c1e45d1 | 168 | else |
3f75c616 | 169 | cx18_write_reg(cx, r & ~SETSDL_BIT, addr); |
1c1e45d1 HV |
170 | } |
171 | ||
172 | static int cx18_getscl(void *data) | |
173 | { | |
174 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
175 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
176 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; | |
177 | ||
b1526421 | 178 | return cx18_read_reg(cx, addr) & GETSCL_BIT; |
1c1e45d1 HV |
179 | } |
180 | ||
181 | static int cx18_getsda(void *data) | |
182 | { | |
183 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; | |
184 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; | |
185 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; | |
186 | ||
b1526421 | 187 | return cx18_read_reg(cx, addr) & GETSDL_BIT; |
1c1e45d1 HV |
188 | } |
189 | ||
190 | /* template for i2c-bit-algo */ | |
191 | static struct i2c_adapter cx18_i2c_adap_template = { | |
192 | .name = "cx18 i2c driver", | |
1c1e45d1 HV |
193 | .algo = NULL, /* set by i2c-algo-bit */ |
194 | .algo_data = NULL, /* filled from template */ | |
1c1e45d1 HV |
195 | .owner = THIS_MODULE, |
196 | }; | |
197 | ||
198 | #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ | |
199 | #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ | |
200 | ||
201 | static struct i2c_algo_bit_data cx18_i2c_algo_template = { | |
202 | .setsda = cx18_setsda, | |
203 | .setscl = cx18_setscl, | |
204 | .getsda = cx18_getsda, | |
205 | .getscl = cx18_getscl, | |
206 | .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ | |
207 | .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ | |
208 | }; | |
209 | ||
1c1e45d1 HV |
210 | /* init + register i2c algo-bit adapter */ |
211 | int init_cx18_i2c(struct cx18 *cx) | |
212 | { | |
272aa396 | 213 | int i, err; |
1c1e45d1 HV |
214 | CX18_DEBUG_I2C("i2c init\n"); |
215 | ||
216 | for (i = 0; i < 2; i++) { | |
ff2a2001 | 217 | /* Setup algorithm for adapter */ |
1c1e45d1 HV |
218 | memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template, |
219 | sizeof(struct i2c_algo_bit_data)); | |
220 | cx->i2c_algo_cb_data[i].cx = cx; | |
221 | cx->i2c_algo_cb_data[i].bus_index = i; | |
222 | cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; | |
1c1e45d1 | 223 | |
ff2a2001 AW |
224 | /* Setup adapter */ |
225 | memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template, | |
226 | sizeof(struct i2c_adapter)); | |
227 | cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; | |
1c1e45d1 | 228 | sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), |
5811cf99 | 229 | " #%d-%d", cx->instance, i); |
ff2a2001 | 230 | i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); |
3d05913d | 231 | cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; |
1c1e45d1 HV |
232 | } |
233 | ||
b1526421 | 234 | if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { |
1c1e45d1 | 235 | /* Reset/Unreset I2C hardware block */ |
b1526421 | 236 | /* Clock select 220MHz */ |
ced07371 AW |
237 | cx18_write_reg_expect(cx, 0x10000000, 0xc71004, |
238 | 0x00000000, 0x10001000); | |
b1526421 | 239 | /* Clock Enable */ |
ced07371 AW |
240 | cx18_write_reg_expect(cx, 0x10001000, 0xc71024, |
241 | 0x00001000, 0x10001000); | |
1c1e45d1 HV |
242 | } |
243 | /* courtesy of Steven Toth <stoth@hauppauge.com> */ | |
ced07371 | 244 | cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); |
1c1e45d1 | 245 | mdelay(10); |
ced07371 | 246 | cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); |
1c1e45d1 | 247 | mdelay(10); |
ced07371 | 248 | cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); |
53ad02ef | 249 | mdelay(10); |
1c1e45d1 | 250 | |
b1526421 | 251 | /* Set to edge-triggered intrs. */ |
ced07371 | 252 | cx18_write_reg(cx, 0x00c00000, 0xc730c8); |
b1526421 | 253 | /* Clear any stale intrs */ |
ced07371 AW |
254 | cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, |
255 | ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); | |
1c1e45d1 HV |
256 | |
257 | /* Hw I2C1 Clock Freq ~100kHz */ | |
3f75c616 | 258 | cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); |
1c1e45d1 HV |
259 | cx18_setscl(&cx->i2c_algo_cb_data[0], 1); |
260 | cx18_setsda(&cx->i2c_algo_cb_data[0], 1); | |
261 | ||
262 | /* Hw I2C2 Clock Freq ~100kHz */ | |
3f75c616 | 263 | cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); |
1c1e45d1 HV |
264 | cx18_setscl(&cx->i2c_algo_cb_data[1], 1); |
265 | cx18_setsda(&cx->i2c_algo_cb_data[1], 1); | |
266 | ||
eefe1010 AW |
267 | cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, |
268 | core, reset, (u32) CX18_GPIO_RESET_I2C); | |
1f09e8a2 | 269 | |
272aa396 JD |
270 | err = i2c_bit_add_bus(&cx->i2c_adap[0]); |
271 | if (err) | |
272 | goto err; | |
273 | err = i2c_bit_add_bus(&cx->i2c_adap[1]); | |
274 | if (err) | |
275 | goto err_del_bus_0; | |
276 | return 0; | |
277 | ||
278 | err_del_bus_0: | |
279 | i2c_del_adapter(&cx->i2c_adap[0]); | |
280 | err: | |
281 | return err; | |
1c1e45d1 HV |
282 | } |
283 | ||
284 | void exit_cx18_i2c(struct cx18 *cx) | |
285 | { | |
286 | int i; | |
287 | CX18_DEBUG_I2C("i2c exit\n"); | |
b1526421 AW |
288 | cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, |
289 | CX18_REG_I2C_1_WR); | |
290 | cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, | |
291 | CX18_REG_I2C_2_WR); | |
1c1e45d1 HV |
292 | |
293 | for (i = 0; i < 2; i++) { | |
294 | i2c_del_adapter(&cx->i2c_adap[i]); | |
295 | } | |
296 | } | |
297 | ||
298 | /* | |
299 | Hauppauge HVR1600 should have: | |
300 | 32 cx24227 | |
301 | 98 unknown | |
302 | a0 eeprom | |
303 | c2 tuner | |
304 | e? zilog ir | |
305 | */ |