4 * Derived from ivtv-i2c.c
6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
24 #include "cx18-driver.h"
25 #include "cx18-cards.h"
26 #include "cx18-gpio.h"
27 #include "cx18-av-core.h"
29 #include <media/ir-kbd-i2c.h>
31 #define CX18_REG_I2C_1_WR 0xf15000
32 #define CX18_REG_I2C_1_RD 0xf15008
33 #define CX18_REG_I2C_2_WR 0xf25100
34 #define CX18_REG_I2C_2_RD 0xf25108
36 #define SETSCL_BIT 0x0001
37 #define SETSDL_BIT 0x0002
38 #define GETSCL_BIT 0x0004
39 #define GETSDL_BIT 0x0008
41 #ifndef I2C_ADAP_CLASS_TV_ANALOG
42 #define I2C_ADAP_CLASS_TV_ANALOG I2C_CLASS_TV_ANALOG
45 #define CX18_CS5345_I2C_ADDR 0x4c
47 /* This array should match the CX18_HW_ defines */
48 static const u8 hw_driverids
[] = {
50 I2C_DRIVERID_TVEEPROM
,
52 0, /* CX18_HW_GPIO dummy driver ID */
53 0 /* CX18_HW_CX23418 dummy driver ID */
56 /* This array should match the CX18_HW_ defines */
57 static const u8 hw_addrs
[] = {
61 0, /* CX18_HW_GPIO dummy driver ID */
62 0, /* CX18_HW_CX23418 dummy driver ID */
65 /* This array should match the CX18_HW_ defines */
66 /* This might well become a card-specific array */
67 static const u8 hw_bus
[] = {
71 0, /* CX18_HW_GPIO dummy driver ID */
72 0, /* CX18_HW_CX23418 dummy driver ID */
75 /* This array should match the CX18_HW_ defines */
76 static const char * const hw_drivernames
[] = {
84 int cx18_i2c_register(struct cx18
*cx
, unsigned idx
)
86 struct i2c_board_info info
;
91 CX18_DEBUG_I2C("i2c client register\n");
92 if (idx
>= ARRAY_SIZE(hw_driverids
) || hw_driverids
[idx
] == 0)
94 id
= hw_driverids
[idx
];
96 memset(&info
, 0, sizeof(info
));
97 strlcpy(info
.driver_name
, hw_drivernames
[idx
],
98 sizeof(info
.driver_name
));
99 info
.addr
= hw_addrs
[idx
];
100 for (i
= 0; i
< I2C_CLIENTS_MAX
; i
++)
101 if (cx
->i2c_clients
[i
] == NULL
)
104 if (i
== I2C_CLIENTS_MAX
) {
105 CX18_ERR("insufficient room for new I2C client!\n");
109 if (id
!= I2C_DRIVERID_TUNER
) {
110 c
= i2c_new_device(&cx
->i2c_adap
[bus
], &info
);
111 if (c
->driver
== NULL
)
112 i2c_unregister_device(c
);
114 cx
->i2c_clients
[i
] = c
;
115 return cx
->i2c_clients
[i
] ? 0 : -ENODEV
;
118 /* special tuner handling */
119 c
= i2c_new_probed_device(&cx
->i2c_adap
[1], &info
, cx
->card_i2c
->radio
);
120 if (c
&& c
->driver
== NULL
)
121 i2c_unregister_device(c
);
123 cx
->i2c_clients
[i
++] = c
;
124 c
= i2c_new_probed_device(&cx
->i2c_adap
[1], &info
, cx
->card_i2c
->demod
);
125 if (c
&& c
->driver
== NULL
)
126 i2c_unregister_device(c
);
128 cx
->i2c_clients
[i
++] = c
;
129 c
= i2c_new_probed_device(&cx
->i2c_adap
[1], &info
, cx
->card_i2c
->tv
);
130 if (c
&& c
->driver
== NULL
)
131 i2c_unregister_device(c
);
133 cx
->i2c_clients
[i
++] = c
;
137 static int attach_inform(struct i2c_client
*client
)
142 static int detach_inform(struct i2c_client
*client
)
145 struct cx18
*cx
= (struct cx18
*)i2c_get_adapdata(client
->adapter
);
147 CX18_DEBUG_I2C("i2c client detach\n");
148 for (i
= 0; i
< I2C_CLIENTS_MAX
; i
++) {
149 if (cx
->i2c_clients
[i
] == client
) {
150 cx
->i2c_clients
[i
] = NULL
;
154 CX18_DEBUG_I2C("i2c detach [client=%s,%s]\n",
155 client
->name
, (i
< I2C_CLIENTS_MAX
) ? "ok" : "failed");
160 static void cx18_setscl(void *data
, int state
)
162 struct cx18
*cx
= ((struct cx18_i2c_algo_callback_data
*)data
)->cx
;
163 int bus_index
= ((struct cx18_i2c_algo_callback_data
*)data
)->bus_index
;
164 u32 addr
= bus_index
? CX18_REG_I2C_2_WR
: CX18_REG_I2C_1_WR
;
165 u32 r
= read_reg(addr
);
168 write_reg_sync(r
| SETSCL_BIT
, addr
);
170 write_reg_sync(r
& ~SETSCL_BIT
, addr
);
173 static void cx18_setsda(void *data
, int state
)
175 struct cx18
*cx
= ((struct cx18_i2c_algo_callback_data
*)data
)->cx
;
176 int bus_index
= ((struct cx18_i2c_algo_callback_data
*)data
)->bus_index
;
177 u32 addr
= bus_index
? CX18_REG_I2C_2_WR
: CX18_REG_I2C_1_WR
;
178 u32 r
= read_reg(addr
);
181 write_reg_sync(r
| SETSDL_BIT
, addr
);
183 write_reg_sync(r
& ~SETSDL_BIT
, addr
);
186 static int cx18_getscl(void *data
)
188 struct cx18
*cx
= ((struct cx18_i2c_algo_callback_data
*)data
)->cx
;
189 int bus_index
= ((struct cx18_i2c_algo_callback_data
*)data
)->bus_index
;
190 u32 addr
= bus_index
? CX18_REG_I2C_2_RD
: CX18_REG_I2C_1_RD
;
192 return read_reg(addr
) & GETSCL_BIT
;
195 static int cx18_getsda(void *data
)
197 struct cx18
*cx
= ((struct cx18_i2c_algo_callback_data
*)data
)->cx
;
198 int bus_index
= ((struct cx18_i2c_algo_callback_data
*)data
)->bus_index
;
199 u32 addr
= bus_index
? CX18_REG_I2C_2_RD
: CX18_REG_I2C_1_RD
;
201 return read_reg(addr
) & GETSDL_BIT
;
204 /* template for i2c-bit-algo */
205 static struct i2c_adapter cx18_i2c_adap_template
= {
206 .name
= "cx18 i2c driver",
207 .id
= I2C_HW_B_CX2341X
,
208 .algo
= NULL
, /* set by i2c-algo-bit */
209 .algo_data
= NULL
, /* filled from template */
210 .client_register
= attach_inform
,
211 .client_unregister
= detach_inform
,
212 .owner
= THIS_MODULE
,
215 #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */
216 #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */
218 static struct i2c_algo_bit_data cx18_i2c_algo_template
= {
219 .setsda
= cx18_setsda
,
220 .setscl
= cx18_setscl
,
221 .getsda
= cx18_getsda
,
222 .getscl
= cx18_getscl
,
223 .udelay
= CX18_SCL_PERIOD
/2, /* 1/2 clock period in usec*/
224 .timeout
= CX18_ALGO_BIT_TIMEOUT
*HZ
/* jiffies */
227 static struct i2c_client cx18_i2c_client_template
= {
228 .name
= "cx18 internal",
231 int cx18_call_i2c_client(struct cx18
*cx
, int addr
, unsigned cmd
, void *arg
)
233 struct i2c_client
*client
;
237 CX18_DEBUG_I2C("call_i2c_client addr=%02x\n", addr
);
238 for (i
= 0; i
< I2C_CLIENTS_MAX
; i
++) {
239 client
= cx
->i2c_clients
[i
];
240 if (client
== NULL
|| client
->driver
== NULL
||
241 client
->driver
->command
== NULL
)
243 if (addr
== client
->addr
) {
244 retval
= client
->driver
->command(client
, cmd
, arg
);
248 if (cmd
!= VIDIOC_G_CHIP_IDENT
)
249 CX18_ERR("i2c addr 0x%02x not found for cmd 0x%x!\n",
254 /* Find the i2c device based on the driver ID and return
255 its i2c address or -ENODEV if no matching device was found. */
256 static int cx18_i2c_id_addr(struct cx18
*cx
, u32 id
)
258 struct i2c_client
*client
;
259 int retval
= -ENODEV
;
262 for (i
= 0; i
< I2C_CLIENTS_MAX
; i
++) {
263 client
= cx
->i2c_clients
[i
];
264 if (client
== NULL
|| client
->driver
== NULL
)
266 if (id
== client
->driver
->id
) {
267 retval
= client
->addr
;
274 /* Find the i2c device name matching the DRIVERID */
275 static const char *cx18_i2c_id_name(u32 id
)
279 for (i
= 0; i
< ARRAY_SIZE(hw_driverids
); i
++)
280 if (hw_driverids
[i
] == id
)
281 return hw_drivernames
[i
];
282 return "unknown device";
285 /* Find the i2c device name matching the CX18_HW_ flag */
286 static const char *cx18_i2c_hw_name(u32 hw
)
290 for (i
= 0; i
< ARRAY_SIZE(hw_driverids
); i
++)
292 return hw_drivernames
[i
];
293 return "unknown device";
296 /* Find the i2c device matching the CX18_HW_ flag and return
297 its i2c address or -ENODEV if no matching device was found. */
298 int cx18_i2c_hw_addr(struct cx18
*cx
, u32 hw
)
302 for (i
= 0; i
< ARRAY_SIZE(hw_driverids
); i
++)
304 return cx18_i2c_id_addr(cx
, hw_driverids
[i
]);
308 /* Calls i2c device based on CX18_HW_ flag. If hw == 0, then do nothing.
309 If hw == CX18_HW_GPIO then call the gpio handler. */
310 int cx18_i2c_hw(struct cx18
*cx
, u32 hw
, unsigned int cmd
, void *arg
)
314 if (hw
== CX18_HW_GPIO
|| hw
== 0)
316 if (hw
== CX18_HW_CX23418
)
317 return cx18_av_cmd(cx
, cmd
, arg
);
319 addr
= cx18_i2c_hw_addr(cx
, hw
);
321 CX18_ERR("i2c hardware 0x%08x (%s) not found for cmd 0x%x!\n",
322 hw
, cx18_i2c_hw_name(hw
), cmd
);
325 return cx18_call_i2c_client(cx
, addr
, cmd
, arg
);
328 /* Calls i2c device based on I2C driver ID. */
329 int cx18_i2c_id(struct cx18
*cx
, u32 id
, unsigned int cmd
, void *arg
)
333 addr
= cx18_i2c_id_addr(cx
, id
);
335 if (cmd
!= VIDIOC_G_CHIP_IDENT
)
336 CX18_ERR("i2c ID 0x%08x (%s) not found for cmd 0x%x!\n",
337 id
, cx18_i2c_id_name(id
), cmd
);
340 return cx18_call_i2c_client(cx
, addr
, cmd
, arg
);
343 /* broadcast cmd for all I2C clients and for the gpio subsystem */
344 void cx18_call_i2c_clients(struct cx18
*cx
, unsigned int cmd
, void *arg
)
346 if (cx
->i2c_adap
[0].algo
== NULL
|| cx
->i2c_adap
[1].algo
== NULL
) {
347 CX18_ERR("adapter is not set\n");
350 cx18_av_cmd(cx
, cmd
, arg
);
351 i2c_clients_command(&cx
->i2c_adap
[0], cmd
, arg
);
352 i2c_clients_command(&cx
->i2c_adap
[1], cmd
, arg
);
355 /* init + register i2c algo-bit adapter */
356 int init_cx18_i2c(struct cx18
*cx
)
359 CX18_DEBUG_I2C("i2c init\n");
361 for (i
= 0; i
< 2; i
++) {
362 memcpy(&cx
->i2c_adap
[i
], &cx18_i2c_adap_template
,
363 sizeof(struct i2c_adapter
));
364 memcpy(&cx
->i2c_algo
[i
], &cx18_i2c_algo_template
,
365 sizeof(struct i2c_algo_bit_data
));
366 cx
->i2c_algo_cb_data
[i
].cx
= cx
;
367 cx
->i2c_algo_cb_data
[i
].bus_index
= i
;
368 cx
->i2c_algo
[i
].data
= &cx
->i2c_algo_cb_data
[i
];
369 cx
->i2c_adap
[i
].algo_data
= &cx
->i2c_algo
[i
];
371 sprintf(cx
->i2c_adap
[i
].name
+ strlen(cx
->i2c_adap
[i
].name
),
372 " #%d-%d", cx
->num
, i
);
373 i2c_set_adapdata(&cx
->i2c_adap
[i
], cx
);
375 memcpy(&cx
->i2c_client
[i
], &cx18_i2c_client_template
,
376 sizeof(struct i2c_client
));
377 sprintf(cx
->i2c_client
[i
].name
+
378 strlen(cx
->i2c_client
[i
].name
), "%d", i
);
379 cx
->i2c_client
[i
].adapter
= &cx
->i2c_adap
[i
];
380 cx
->i2c_adap
[i
].dev
.parent
= &cx
->dev
->dev
;
383 if (read_reg(CX18_REG_I2C_2_WR
) != 0x0003c02f) {
384 /* Reset/Unreset I2C hardware block */
385 write_reg(0x10000000, 0xc71004); /* Clock select 220MHz */
386 write_reg_sync(0x10001000, 0xc71024); /* Clock Enable */
388 /* courtesy of Steven Toth <stoth@hauppauge.com> */
389 write_reg_sync(0x00c00000, 0xc7001c);
391 write_reg_sync(0x00c000c0, 0xc7001c);
393 write_reg_sync(0x00c00000, 0xc7001c);
395 write_reg_sync(0x00c00000, 0xc730c8); /* Set to edge-triggered intrs. */
396 write_reg_sync(0x00c00000, 0xc730c4); /* Clear any stale intrs */
398 /* Hw I2C1 Clock Freq ~100kHz */
399 write_reg_sync(0x00021c0f & ~4, CX18_REG_I2C_1_WR
);
400 cx18_setscl(&cx
->i2c_algo_cb_data
[0], 1);
401 cx18_setsda(&cx
->i2c_algo_cb_data
[0], 1);
403 /* Hw I2C2 Clock Freq ~100kHz */
404 write_reg_sync(0x00021c0f & ~4, CX18_REG_I2C_2_WR
);
405 cx18_setscl(&cx
->i2c_algo_cb_data
[1], 1);
406 cx18_setsda(&cx
->i2c_algo_cb_data
[1], 1);
408 return i2c_bit_add_bus(&cx
->i2c_adap
[0]) ||
409 i2c_bit_add_bus(&cx
->i2c_adap
[1]);
412 void exit_cx18_i2c(struct cx18
*cx
)
415 CX18_DEBUG_I2C("i2c exit\n");
416 write_reg(read_reg(CX18_REG_I2C_1_WR
) | 4, CX18_REG_I2C_1_WR
);
417 write_reg(read_reg(CX18_REG_I2C_2_WR
) | 4, CX18_REG_I2C_2_WR
);
419 for (i
= 0; i
< 2; i
++) {
420 i2c_del_adapter(&cx
->i2c_adap
[i
]);
425 Hauppauge HVR1600 should have: