3 #include "dibx000_common.h"
6 module_param(debug, int, 0644);
7 MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
9 #define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiBX000: "); printk(args); printk("\n"); } } while (0)
11 static int dibx000_write_word(struct dibx000_i2c_master *mst, u16 reg, u16 val)
13 mst->i2c_write_buffer[0] = (reg >> 8) & 0xff;
14 mst->i2c_write_buffer[1] = reg & 0xff;
15 mst->i2c_write_buffer[2] = (val >> 8) & 0xff;
16 mst->i2c_write_buffer[3] = val & 0xff;
18 memset(mst->msg, 0, sizeof(struct i2c_msg));
19 mst->msg[0].addr = mst->i2c_addr;
20 mst->msg[0].flags = 0;
21 mst->msg[0].buf = mst->i2c_write_buffer;
24 return i2c_transfer(mst->i2c_adap, mst->msg, 1) != 1 ? -EREMOTEIO : 0;
27 static u16 dibx000_read_word(struct dibx000_i2c_master *mst, u16 reg)
29 mst->i2c_write_buffer[0] = reg >> 8;
30 mst->i2c_write_buffer[1] = reg & 0xff;
32 memset(mst->msg, 0, 2 * sizeof(struct i2c_msg));
33 mst->msg[0].addr = mst->i2c_addr;
34 mst->msg[0].flags = 0;
35 mst->msg[0].buf = mst->i2c_write_buffer;
37 mst->msg[1].addr = mst->i2c_addr;
38 mst->msg[1].flags = I2C_M_RD;
39 mst->msg[1].buf = mst->i2c_read_buffer;
42 if (i2c_transfer(mst->i2c_adap, mst->msg, 2) != 2)
43 dprintk("i2c read error on %d", reg);
45 return (mst->i2c_read_buffer[0] << 8) | mst->i2c_read_buffer[1];
48 static int dibx000_is_i2c_done(struct dibx000_i2c_master *mst)
53 while (((status = dibx000_read_word(mst, mst->base_reg + 2)) & 0x0100) == 0 && --i > 0)
61 if ((status & 0x0080) == 0)
67 static int dibx000_master_i2c_write(struct dibx000_i2c_master *mst, struct i2c_msg *msg, u8 stop)
72 u16 txlen = msg->len, len;
73 const u8 *b = msg->buf;
76 dibx000_read_word(mst, mst->base_reg + 2);
78 len = txlen > 8 ? 8 : txlen;
79 for (i = 0; i < len; i += 2) {
83 dibx000_write_word(mst, mst->base_reg, data);
85 da = (((u8) (msg->addr)) << 9) |
94 if (txlen == msg->len)
95 da |= 1 << 5; /* start */
97 if (txlen-len == 0 && stop)
98 da |= 1 << 6; /* stop */
100 dibx000_write_word(mst, mst->base_reg+1, da);
102 if (dibx000_is_i2c_done(mst) != 0)
110 static int dibx000_master_i2c_read(struct dibx000_i2c_master *mst, struct i2c_msg *msg)
114 u16 rxlen = msg->len, len;
117 len = rxlen > 8 ? 8 : rxlen;
118 da = (((u8) (msg->addr)) << 9) |
127 if (rxlen == msg->len)
128 da |= 1 << 5; /* start */
131 da |= 1 << 6; /* stop */
132 dibx000_write_word(mst, mst->base_reg+1, da);
134 if (dibx000_is_i2c_done(mst) != 0)
140 da = dibx000_read_word(mst, mst->base_reg);
141 *b++ = (da >> 8) & 0xff;
153 int dibx000_i2c_set_speed(struct i2c_adapter *i2c_adap, u16 speed)
155 struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
157 if (mst->device_rev < DIB7000MC && speed < 235)
159 return dibx000_write_word(mst, mst->base_reg + 3, (u16)(60000 / speed));
162 EXPORT_SYMBOL(dibx000_i2c_set_speed);
164 static u32 dibx000_i2c_func(struct i2c_adapter *adapter)
169 static int dibx000_i2c_select_interface(struct dibx000_i2c_master *mst,
170 enum dibx000_i2c_interface intf)
172 if (mst->device_rev > DIB3000MC && mst->selected_interface != intf) {
173 dprintk("selecting interface: %d", intf);
174 mst->selected_interface = intf;
175 return dibx000_write_word(mst, mst->base_reg + 4, intf);
180 static int dibx000_i2c_master_xfer_gpio12(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
182 struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
186 dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_1_2);
187 for (msg_index = 0; msg_index < num; msg_index++) {
188 if (msg[msg_index].flags & I2C_M_RD) {
189 ret = dibx000_master_i2c_read(mst, &msg[msg_index]);
193 ret = dibx000_master_i2c_write(mst, &msg[msg_index], 1);
202 static int dibx000_i2c_master_xfer_gpio34(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num)
204 struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
208 dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_3_4);
209 for (msg_index = 0; msg_index < num; msg_index++) {
210 if (msg[msg_index].flags & I2C_M_RD) {
211 ret = dibx000_master_i2c_read(mst, &msg[msg_index]);
215 ret = dibx000_master_i2c_write(mst, &msg[msg_index], 1);
224 static struct i2c_algorithm dibx000_i2c_master_gpio12_xfer_algo = {
225 .master_xfer = dibx000_i2c_master_xfer_gpio12,
226 .functionality = dibx000_i2c_func,
229 static struct i2c_algorithm dibx000_i2c_master_gpio34_xfer_algo = {
230 .master_xfer = dibx000_i2c_master_xfer_gpio34,
231 .functionality = dibx000_i2c_func,
234 static int dibx000_i2c_gate_ctrl(struct dibx000_i2c_master *mst, u8 tx[4],
241 val = addr << 8; // bit 7 = use master or not, if 0, the gate is open
245 if (mst->device_rev > DIB7000)
248 tx[0] = (((mst->base_reg + 1) >> 8) & 0xff);
249 tx[1] = ((mst->base_reg + 1) & 0xff);
256 static int dibx000_i2c_gated_gpio67_xfer(struct i2c_adapter *i2c_adap,
257 struct i2c_msg msg[], int num)
259 struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
262 dprintk("%s: too much I2C message to be transmitted (%i).\
263 Maximum is 32", __func__, num);
267 memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
269 dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_GPIO_6_7);
272 dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
273 mst->msg[0].addr = mst->i2c_addr;
274 mst->msg[0].buf = &mst->i2c_write_buffer[0];
277 memcpy(&mst->msg[1], msg, sizeof(struct i2c_msg) * num);
280 dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[4], 0, 0);
281 mst->msg[num + 1].addr = mst->i2c_addr;
282 mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
283 mst->msg[num + 1].len = 4;
285 return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
288 static struct i2c_algorithm dibx000_i2c_gated_gpio67_algo = {
289 .master_xfer = dibx000_i2c_gated_gpio67_xfer,
290 .functionality = dibx000_i2c_func,
293 static int dibx000_i2c_gated_tuner_xfer(struct i2c_adapter *i2c_adap,
294 struct i2c_msg msg[], int num)
296 struct dibx000_i2c_master *mst = i2c_get_adapdata(i2c_adap);
299 dprintk("%s: too much I2C message to be transmitted (%i).\
300 Maximum is 32", __func__, num);
304 memset(mst->msg, 0, sizeof(struct i2c_msg) * (2 + num));
306 dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
309 dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[0], msg[0].addr, 1);
310 mst->msg[0].addr = mst->i2c_addr;
311 mst->msg[0].buf = &mst->i2c_write_buffer[0];
314 memcpy(&mst->msg[1], msg, sizeof(struct i2c_msg) * num);
317 dibx000_i2c_gate_ctrl(mst, &mst->i2c_write_buffer[4], 0, 0);
318 mst->msg[num + 1].addr = mst->i2c_addr;
319 mst->msg[num + 1].buf = &mst->i2c_write_buffer[4];
320 mst->msg[num + 1].len = 4;
322 return i2c_transfer(mst->i2c_adap, mst->msg, 2 + num) == 2 + num ? num : -EIO;
325 static struct i2c_algorithm dibx000_i2c_gated_tuner_algo = {
326 .master_xfer = dibx000_i2c_gated_tuner_xfer,
327 .functionality = dibx000_i2c_func,
330 struct i2c_adapter *dibx000_get_i2c_adapter(struct dibx000_i2c_master *mst,
331 enum dibx000_i2c_interface intf,
334 struct i2c_adapter *i2c = NULL;
337 case DIBX000_I2C_INTERFACE_TUNER:
339 i2c = &mst->gated_tuner_i2c_adap;
341 case DIBX000_I2C_INTERFACE_GPIO_1_2:
343 i2c = &mst->master_i2c_adap_gpio12;
345 case DIBX000_I2C_INTERFACE_GPIO_3_4:
347 i2c = &mst->master_i2c_adap_gpio34;
349 case DIBX000_I2C_INTERFACE_GPIO_6_7:
351 i2c = &mst->master_i2c_adap_gpio67;
354 printk(KERN_ERR "DiBX000: incorrect I2C interface selected\n");
361 EXPORT_SYMBOL(dibx000_get_i2c_adapter);
363 void dibx000_reset_i2c_master(struct dibx000_i2c_master *mst)
365 /* initialize the i2c-master by closing the gate */
367 struct i2c_msg m = {.addr = mst->i2c_addr,.buf = tx,.len = 4 };
369 dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
370 i2c_transfer(mst->i2c_adap, &m, 1);
371 mst->selected_interface = 0xff; // the first time force a select of the I2C
372 dibx000_i2c_select_interface(mst, DIBX000_I2C_INTERFACE_TUNER);
375 EXPORT_SYMBOL(dibx000_reset_i2c_master);
377 static int i2c_adapter_init(struct i2c_adapter *i2c_adap,
378 struct i2c_algorithm *algo, const char *name,
379 struct dibx000_i2c_master *mst)
381 strncpy(i2c_adap->name, name, sizeof(i2c_adap->name));
382 i2c_adap->algo = algo;
383 i2c_adap->algo_data = NULL;
384 i2c_set_adapdata(i2c_adap, mst);
385 if (i2c_add_adapter(i2c_adap) < 0)
390 int dibx000_init_i2c_master(struct dibx000_i2c_master *mst, u16 device_rev,
391 struct i2c_adapter *i2c_adap, u8 i2c_addr)
394 struct i2c_msg m = {.addr = i2c_addr >> 1,.buf = tx,.len = 4 };
396 mst->device_rev = device_rev;
397 mst->i2c_adap = i2c_adap;
398 mst->i2c_addr = i2c_addr >> 1;
400 if (device_rev == DIB7000P || device_rev == DIB8000)
401 mst->base_reg = 1024;
405 mst->gated_tuner_i2c_adap.dev.parent = mst->i2c_adap->dev.parent;
407 (&mst->gated_tuner_i2c_adap, &dibx000_i2c_gated_tuner_algo,
408 "DiBX000 tuner I2C bus", mst) != 0)
410 "DiBX000: could not initialize the tuner i2c_adapter\n");
412 mst->master_i2c_adap_gpio12.dev.parent = mst->i2c_adap->dev.parent;
414 (&mst->master_i2c_adap_gpio12, &dibx000_i2c_master_gpio12_xfer_algo,
415 "DiBX000 master GPIO12 I2C bus", mst) != 0)
417 "DiBX000: could not initialize the master i2c_adapter\n");
419 mst->master_i2c_adap_gpio34.dev.parent = mst->i2c_adap->dev.parent;
421 (&mst->master_i2c_adap_gpio34, &dibx000_i2c_master_gpio34_xfer_algo,
422 "DiBX000 master GPIO34 I2C bus", mst) != 0)
424 "DiBX000: could not initialize the master i2c_adapter\n");
426 mst->master_i2c_adap_gpio67.dev.parent = mst->i2c_adap->dev.parent;
428 (&mst->master_i2c_adap_gpio67, &dibx000_i2c_gated_gpio67_algo,
429 "DiBX000 master GPIO67 I2C bus", mst) != 0)
431 "DiBX000: could not initialize the master i2c_adapter\n");
433 /* initialize the i2c-master by closing the gate */
434 dibx000_i2c_gate_ctrl(mst, tx, 0, 0);
436 return i2c_transfer(i2c_adap, &m, 1) == 1;
439 EXPORT_SYMBOL(dibx000_init_i2c_master);
441 void dibx000_exit_i2c_master(struct dibx000_i2c_master *mst)
443 i2c_del_adapter(&mst->gated_tuner_i2c_adap);
444 i2c_del_adapter(&mst->master_i2c_adap_gpio12);
445 i2c_del_adapter(&mst->master_i2c_adap_gpio34);
446 i2c_del_adapter(&mst->master_i2c_adap_gpio67);
448 EXPORT_SYMBOL(dibx000_exit_i2c_master);
455 t = current_kernel_time();
456 return (t.tv_sec * 10000) + (t.tv_nsec / 100000);
458 EXPORT_SYMBOL(systime);
460 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
461 MODULE_DESCRIPTION("Common function the DiBcom demodulator family");
462 MODULE_LICENSE("GPL");