1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * cx18 I2C functions |
4 | * |
5 | * Derived from ivtv-i2c.c |
6 | * |
7 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> |
8 | * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> |
9 | */ |
10 | |
11 | #include "cx18-driver.h" |
12 | #include "cx18-io.h" |
13 | #include "cx18-cards.h" |
14 | #include "cx18-gpio.h" |
15 | #include "cx18-i2c.h" |
16 | #include "cx18-irq.h" |
17 | |
18 | #define CX18_REG_I2C_1_WR 0xf15000 |
19 | #define CX18_REG_I2C_1_RD 0xf15008 |
20 | #define CX18_REG_I2C_2_WR 0xf25100 |
21 | #define CX18_REG_I2C_2_RD 0xf25108 |
22 | |
23 | #define SETSCL_BIT 0x0001 |
24 | #define SETSDL_BIT 0x0002 |
25 | #define GETSCL_BIT 0x0004 |
26 | #define GETSDL_BIT 0x0008 |
27 | |
28 | #define CX18_CS5345_I2C_ADDR 0x4c |
29 | #define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70 |
30 | #define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71 |
31 | |
32 | /* This array should match the CX18_HW_ defines */ |
33 | static const u8 hw_addrs[] = { |
34 | 0, /* CX18_HW_TUNER */ |
35 | 0, /* CX18_HW_TVEEPROM */ |
36 | CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */ |
37 | 0, /* CX18_HW_DVB */ |
38 | 0, /* CX18_HW_418_AV */ |
39 | 0, /* CX18_HW_GPIO_MUX */ |
40 | 0, /* CX18_HW_GPIO_RESET_CTRL */ |
41 | CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_HAUP */ |
42 | }; |
43 | |
44 | /* This array should match the CX18_HW_ defines */ |
45 | /* This might well become a card-specific array */ |
46 | static const u8 hw_bus[] = { |
47 | 1, /* CX18_HW_TUNER */ |
48 | 0, /* CX18_HW_TVEEPROM */ |
49 | 0, /* CX18_HW_CS5345 */ |
50 | 0, /* CX18_HW_DVB */ |
51 | 0, /* CX18_HW_418_AV */ |
52 | 0, /* CX18_HW_GPIO_MUX */ |
53 | 0, /* CX18_HW_GPIO_RESET_CTRL */ |
54 | 0, /* CX18_HW_Z8F0811_IR_HAUP */ |
55 | }; |
56 | |
57 | /* This array should match the CX18_HW_ defines */ |
58 | static const char * const hw_devicenames[] = { |
59 | "tuner" , |
60 | "tveeprom" , |
61 | "cs5345" , |
62 | "cx23418_DTV" , |
63 | "cx23418_AV" , |
64 | "gpio_mux" , |
65 | "gpio_reset_ctrl" , |
66 | "ir_z8f0811_haup" , |
67 | }; |
68 | |
69 | static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, |
70 | const char *type, u8 addr) |
71 | { |
72 | struct i2c_board_info info; |
73 | struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; |
74 | unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; |
75 | |
76 | memset(&info, 0, sizeof(struct i2c_board_info)); |
77 | strscpy(info.type, type, I2C_NAME_SIZE); |
78 | |
79 | /* Our default information for ir-kbd-i2c.c to use */ |
80 | switch (hw) { |
81 | case CX18_HW_Z8F0811_IR_HAUP: |
82 | init_data->ir_codes = RC_MAP_HAUPPAUGE; |
83 | init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; |
84 | init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | |
85 | RC_PROTO_BIT_RC6_6A_32; |
86 | init_data->name = cx->card_name; |
87 | info.platform_data = init_data; |
88 | break; |
89 | } |
90 | |
91 | return IS_ERR(ptr: i2c_new_scanned_device(adap, info: &info, addr_list, NULL)) ? |
92 | -1 : 0; |
93 | } |
94 | |
95 | int cx18_i2c_register(struct cx18 *cx, unsigned idx) |
96 | { |
97 | struct v4l2_subdev *sd; |
98 | int bus = hw_bus[idx]; |
99 | struct i2c_adapter *adap = &cx->i2c_adap[bus]; |
100 | const char *type = hw_devicenames[idx]; |
101 | u32 hw = 1 << idx; |
102 | |
103 | if (hw == CX18_HW_TUNER) { |
104 | /* special tuner group handling */ |
105 | sd = v4l2_i2c_new_subdev(v4l2_dev: &cx->v4l2_dev, |
106 | adapter: adap, client_type: type, addr: 0, probe_addrs: cx->card_i2c->radio); |
107 | if (sd != NULL) |
108 | sd->grp_id = hw; |
109 | sd = v4l2_i2c_new_subdev(v4l2_dev: &cx->v4l2_dev, |
110 | adapter: adap, client_type: type, addr: 0, probe_addrs: cx->card_i2c->demod); |
111 | if (sd != NULL) |
112 | sd->grp_id = hw; |
113 | sd = v4l2_i2c_new_subdev(v4l2_dev: &cx->v4l2_dev, |
114 | adapter: adap, client_type: type, addr: 0, probe_addrs: cx->card_i2c->tv); |
115 | if (sd != NULL) |
116 | sd->grp_id = hw; |
117 | return sd != NULL ? 0 : -1; |
118 | } |
119 | |
120 | if (hw == CX18_HW_Z8F0811_IR_HAUP) |
121 | return cx18_i2c_new_ir(cx, adap, hw, type, addr: hw_addrs[idx]); |
122 | |
123 | /* Is it not an I2C device or one we do not wish to register? */ |
124 | if (!hw_addrs[idx]) |
125 | return -1; |
126 | |
127 | /* It's an I2C device other than an analog tuner or IR chip */ |
128 | sd = v4l2_i2c_new_subdev(v4l2_dev: &cx->v4l2_dev, adapter: adap, client_type: type, addr: hw_addrs[idx], |
129 | NULL); |
130 | if (sd != NULL) |
131 | sd->grp_id = hw; |
132 | return sd != NULL ? 0 : -1; |
133 | } |
134 | |
135 | /* Find the first member of the subdev group id in hw */ |
136 | struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) |
137 | { |
138 | struct v4l2_subdev *result = NULL; |
139 | struct v4l2_subdev *sd; |
140 | |
141 | spin_lock(lock: &cx->v4l2_dev.lock); |
142 | v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { |
143 | if (sd->grp_id == hw) { |
144 | result = sd; |
145 | break; |
146 | } |
147 | } |
148 | spin_unlock(lock: &cx->v4l2_dev.lock); |
149 | return result; |
150 | } |
151 | |
152 | static void cx18_setscl(void *data, int state) |
153 | { |
154 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
155 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
156 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; |
157 | u32 r = cx18_read_reg(cx, reg: addr); |
158 | |
159 | if (state) |
160 | cx18_write_reg(cx, val: r | SETSCL_BIT, reg: addr); |
161 | else |
162 | cx18_write_reg(cx, val: r & ~SETSCL_BIT, reg: addr); |
163 | } |
164 | |
165 | static void cx18_setsda(void *data, int state) |
166 | { |
167 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
168 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
169 | u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; |
170 | u32 r = cx18_read_reg(cx, reg: addr); |
171 | |
172 | if (state) |
173 | cx18_write_reg(cx, val: r | SETSDL_BIT, reg: addr); |
174 | else |
175 | cx18_write_reg(cx, val: r & ~SETSDL_BIT, reg: addr); |
176 | } |
177 | |
178 | static int cx18_getscl(void *data) |
179 | { |
180 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
181 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
182 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; |
183 | |
184 | return cx18_read_reg(cx, reg: addr) & GETSCL_BIT; |
185 | } |
186 | |
187 | static int cx18_getsda(void *data) |
188 | { |
189 | struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
190 | int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
191 | u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; |
192 | |
193 | return cx18_read_reg(cx, reg: addr) & GETSDL_BIT; |
194 | } |
195 | |
196 | /* template for i2c-bit-algo */ |
197 | static const struct i2c_adapter cx18_i2c_adap_template = { |
198 | .name = "cx18 i2c driver" , |
199 | .algo = NULL, /* set by i2c-algo-bit */ |
200 | .algo_data = NULL, /* filled from template */ |
201 | .owner = THIS_MODULE, |
202 | }; |
203 | |
204 | #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ |
205 | #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ |
206 | |
207 | static const struct i2c_algo_bit_data cx18_i2c_algo_template = { |
208 | .setsda = cx18_setsda, |
209 | .setscl = cx18_setscl, |
210 | .getsda = cx18_getsda, |
211 | .getscl = cx18_getscl, |
212 | .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ |
213 | .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ |
214 | }; |
215 | |
216 | /* init + register i2c adapter */ |
217 | int init_cx18_i2c(struct cx18 *cx) |
218 | { |
219 | int i, err; |
220 | CX18_DEBUG_I2C("i2c init\n" ); |
221 | |
222 | for (i = 0; i < 2; i++) { |
223 | /* Setup algorithm for adapter */ |
224 | cx->i2c_algo[i] = cx18_i2c_algo_template; |
225 | cx->i2c_algo_cb_data[i].cx = cx; |
226 | cx->i2c_algo_cb_data[i].bus_index = i; |
227 | cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; |
228 | |
229 | /* Setup adapter */ |
230 | cx->i2c_adap[i] = cx18_i2c_adap_template; |
231 | cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; |
232 | sprintf(buf: cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), |
233 | fmt: " #%d-%d" , cx->instance, i); |
234 | i2c_set_adapdata(adap: &cx->i2c_adap[i], data: &cx->v4l2_dev); |
235 | cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; |
236 | } |
237 | |
238 | if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { |
239 | /* Reset/Unreset I2C hardware block */ |
240 | /* Clock select 220MHz */ |
241 | cx18_write_reg_expect(cx, val: 0x10000000, reg: 0xc71004, |
242 | eval: 0x00000000, mask: 0x10001000); |
243 | /* Clock Enable */ |
244 | cx18_write_reg_expect(cx, val: 0x10001000, reg: 0xc71024, |
245 | eval: 0x00001000, mask: 0x10001000); |
246 | } |
247 | /* courtesy of Steven Toth <stoth@hauppauge.com> */ |
248 | cx18_write_reg_expect(cx, val: 0x00c00000, reg: 0xc7001c, eval: 0x00000000, mask: 0x00c000c0); |
249 | mdelay(10); |
250 | cx18_write_reg_expect(cx, val: 0x00c000c0, reg: 0xc7001c, eval: 0x000000c0, mask: 0x00c000c0); |
251 | mdelay(10); |
252 | cx18_write_reg_expect(cx, val: 0x00c00000, reg: 0xc7001c, eval: 0x00000000, mask: 0x00c000c0); |
253 | mdelay(10); |
254 | |
255 | /* Set to edge-triggered intrs. */ |
256 | cx18_write_reg(cx, val: 0x00c00000, reg: 0xc730c8); |
257 | /* Clear any stale intrs */ |
258 | cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, |
259 | eval: ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); |
260 | |
261 | /* Hw I2C1 Clock Freq ~100kHz */ |
262 | cx18_write_reg(cx, val: 0x00021c0f & ~4, CX18_REG_I2C_1_WR); |
263 | cx18_setscl(data: &cx->i2c_algo_cb_data[0], state: 1); |
264 | cx18_setsda(data: &cx->i2c_algo_cb_data[0], state: 1); |
265 | |
266 | /* Hw I2C2 Clock Freq ~100kHz */ |
267 | cx18_write_reg(cx, val: 0x00021c0f & ~4, CX18_REG_I2C_2_WR); |
268 | cx18_setscl(data: &cx->i2c_algo_cb_data[1], state: 1); |
269 | cx18_setsda(data: &cx->i2c_algo_cb_data[1], state: 1); |
270 | |
271 | cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, |
272 | core, reset, (u32) CX18_GPIO_RESET_I2C); |
273 | |
274 | err = i2c_bit_add_bus(&cx->i2c_adap[0]); |
275 | if (err) |
276 | goto err; |
277 | err = i2c_bit_add_bus(&cx->i2c_adap[1]); |
278 | if (err) |
279 | goto err_del_bus_0; |
280 | return 0; |
281 | |
282 | err_del_bus_0: |
283 | i2c_del_adapter(adap: &cx->i2c_adap[0]); |
284 | err: |
285 | return err; |
286 | } |
287 | |
288 | void exit_cx18_i2c(struct cx18 *cx) |
289 | { |
290 | int i; |
291 | CX18_DEBUG_I2C("i2c exit\n" ); |
292 | cx18_write_reg(cx, val: cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, |
293 | CX18_REG_I2C_1_WR); |
294 | cx18_write_reg(cx, val: cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, |
295 | CX18_REG_I2C_2_WR); |
296 | |
297 | for (i = 0; i < 2; i++) { |
298 | i2c_del_adapter(adap: &cx->i2c_adap[i]); |
299 | } |
300 | } |
301 | |
302 | /* |
303 | Hauppauge HVR1600 should have: |
304 | 32 cx24227 |
305 | 98 unknown |
306 | a0 eeprom |
307 | c2 tuner |
308 | e? zilog ir |
309 | */ |
310 | |