2 #include "mipi_dsih_dphy.h"
\r
3 #define PRECISION_FACTOR (1000)
\r
4 /* Reference clock frequency divided by Input Frequency Division Ratio LIMITS */
\r
5 #define DPHY_DIV_UPPER_LIMIT (40000)
\r
7 #define DPHY_DIV_LOWER_LIMIT (5000)
\r
9 #define DPHY_DIV_LOWER_LIMIT (1000)
\r
12 #if ((defined DWC_MIPI_DPHY_BIDIR_TSMC40LP) || (defined GEN_2))
\r
13 #define MIN_OUTPUT_FREQ (80)
\r
14 #elif defined DPHY2Btql
\r
15 #define MIN_OUTPUT_FREQ (200)
\r
19 //#define SOFT_DPHY_CALIBRATION
\r
21 uint8_t mipi_dsih_dphy_calibration(dphy_t * phy)
\r
23 uint8_t rd_data[3],sv_data[3];
\r
25 uint8_t i = 0; /* iterator */
\r
30 /*phy calibration process */
\r
33 mipi_dsih_dphy_write(phy, 0x21, data, 1);
\r
35 for(i =0;i<50;i++ );
\r
37 rd_data[0] = mipi_dsih_dphy_test_data_out(phy);
\r
38 MIPI_PRINT("sprdfb: data[0] = 0x03,rd_data[0] = %x \n",rd_data[0]);
\r
44 mipi_dsih_dphy_write(phy, 0x21, data, 1);
\r
46 for(i =0;i<50;i++) ;
\r
48 rd_data[1] = mipi_dsih_dphy_test_data_out(phy);
\r
49 MIPI_PRINT("sprdfb: data[%d] = %x,rd_data[1] = %x \n",j,data[0],rd_data[1]);
\r
50 if((rd_data[1]&0x80) != (rd_data[0]&0x80))
\r
53 MIPI_PRINT("sprdfb: break--data[%d] = %x,rd_data[0] = %x,rd_data[1] = %x \n",j,data[0],rd_data[0],rd_data[1]);
\r
55 printf("sprdfb: phy calibration error,toggles times more than once \n");
\r
58 rd_data[0] = rd_data[1];
\r
59 sv_data[0] = data[0];
\r
61 if((7 == j) && (0 == sw_cnt)){
\r
62 if(0x80 == (rd_data[1]&0x80))
\r
64 if(0x0 == (rd_data[1]&0x80))
\r
73 mipi_dsih_dphy_write(phy, 0x21, data, 1);
\r
75 for(i =0;i<50;i++ );
\r
77 rd_data[2] = mipi_dsih_dphy_test_data_out(phy);
\r
78 MIPI_PRINT("sprdfb: next-->data[%d] = %x,rd_data[2] = %x \n",j,data[0],rd_data[2]);
\r
79 if((rd_data[2]&0x80) != (rd_data[0]&0x80))
\r
81 MIPI_PRINT("sprdfb: break--next-->data[%d] = %x,rd_data[2] = %x,rd_data[0] = %x \n",j,data[0],rd_data[2],rd_data[0]);
\r
82 rd_data[0] = rd_data[2];
\r
83 sv_data[1] = data[0];
\r
87 sv_data[0] =(sv_data[0]&0x1c) >>2;
\r
88 sv_data[1] =(sv_data[1]&0x1c) >>2;
\r
89 sv_data[0] = sv_data[0] + sv_data[1];
\r
90 sv_data[1] = sv_data[0] / 2 + sv_data[0] % 2;
\r
91 data[0] = (sv_data[1] <<2) | 0x03;
\r
97 dsih_error_t mipi_dsih_dphy_open(dphy_t * phy)
\r
101 return ERR_DSI_PHY_INVALID;
\r
103 else if ((phy->core_read_function == 0) || (phy->core_write_function == 0))
\r
105 return ERR_DSI_INVALID_IO;
\r
107 else if (phy->status == INITIALIZED)
\r
109 return ERR_DSI_PHY_INVALID;
\r
111 phy->status = NOT_INITIALIZED;
\r
113 mipi_dsih_dphy_reset(phy, 0);
\r
114 mipi_dsih_dphy_stop_wait_time(phy, 0x1C);
\r
115 mipi_dsih_dphy_no_of_lanes(phy, 1);
\r
116 mipi_dsih_dphy_clock_en(phy, 1);
\r
117 mipi_dsih_dphy_shutdown(phy, 1);
\r
118 mipi_dsih_dphy_reset(phy, 1);
\r
120 phy->status = INITIALIZED;
\r
124 uint8_t mipi_dsih_dphy_test_data_read(dphy_t * instance, uint8_t address)
\r
126 mipi_dsih_dphy_test_clock(instance, 1);
\r
127 /* set the desired test code in the input 8-bit bus TESTDIN[7:0] */
\r
128 mipi_dsih_dphy_test_data_in(instance, address);
\r
129 /* set TESTEN input high */
\r
130 mipi_dsih_dphy_test_en(instance, 1);
\r
131 /* drive the TESTCLK input low; the falling edge captures the chosen test code into the transceiver */
\r
132 mipi_dsih_dphy_test_clock(instance, 0);
\r
133 /* set TESTEN input low to disable further test mode code latching */
\r
134 mipi_dsih_dphy_test_en(instance, 0);
\r
137 return mipi_dsih_dphy_test_data_out(instance);
\r
141 * Configure D-PHY and PLL module to desired operation mode
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142 * @param phy pointer to structure which holds information about the d-phy
\r
144 * @param no_of_lanes active
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145 * @param output_freq desired high speed frequency
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146 * @return error code
\r
150 dsih_error_t mipi_dsih_dphy_configure(dphy_t * phy, uint8_t no_of_lanes, uint32_t output_freq)
\r
152 uint32_t loop_divider = 0; /* (M) */
\r
153 uint32_t input_divider = 1; /* (N) */
\r
154 uint8_t data[4]; /* maximum data for now are 4 bytes per test mode*/
\r
155 uint8_t no_of_bytes = 0;
\r
157 uint8_t n=0;/* iterator */
\r
158 uint8_t range = 0; /* ranges iterator */
\r
162 uint32_t loop_div; /* upper limit of loop divider range */
\r
163 uint8_t cp_current; /* icpctrl */
\r
164 uint8_t lpf_resistor; /* lpfctrl */
\r
168 { /* gen 2 associates the charge pump current and LPF resistor with the
\r
169 output frequency ranges (and thus we simplify here to use the
\r
170 counter/pointer of the following structure) */
\r
171 { 90, 0x02, 0x02}, { 100, 0x02, 0x02}, { 110, 0x02, 0x02},
\r
172 { 130, 0x02, 0x01}, { 140, 0x02, 0x01}, { 150, 0x02, 0x01},
\r
173 { 170, 0x09, 0x00}, { 180, 0x09, 0x01}, { 200, 0x09, 0x01},
\r
174 { 220, 0x09, 0x04}, { 240, 0x09, 0x04}, { 250, 0x09, 0x04},
\r
175 { 270, 0x06, 0x04}, { 300, 0x06, 0x04}, { 330, 0x09, 0x04},
\r
176 { 360, 0x09, 0x04}, { 400, 0x09, 0x04}, { 450, 0x06, 0x04},
\r
177 { 500, 0x06, 0x04}, { 550, 0x06, 0x04}, { 600, 0x06, 0x04},
\r
178 { 650, 0x0A, 0x04}, { 700, 0x0A, 0x04}, { 750, 0x0A, 0x04},
\r
179 { 800, 0x0A, 0x04}, { 850, 0x0A, 0x04}, { 900, 0x0A, 0x04},
\r
180 { 950, 0x0B, 0x08}, {1000, 0x0B, 0x08}, {1050, 0x0B, 0x08},
\r
181 {1100, 0x0B, 0x08}, {1150, 0x0B, 0x08}, {1200, 0x0B, 0x08},
\r
182 {1250, 0x0B, 0x08}, {1300, 0x0B, 0x08}, {1350, 0x0B, 0x08},
\r
183 {1400, 0x0B, 0x08}, {1450, 0x0B, 0x08}, {1500, 0x0B, 0x08}
\r
185 uint32_t delta = 0;
\r
186 uint32_t tmp_loop_divider = 0;
\r
191 uint32_t freq; /* upper margin of frequency range */
\r
192 uint8_t hs_freq; /* hsfreqrange */
\r
193 uint8_t vco_range; /* vcorange */
\r
197 { 90, 0x00, 0x00}, { 100, 0x10, 0x00}, { 110, 0x20, 0x00},
\r
198 { 130, 0x01, 0x00}, { 140, 0x11, 0x00}, { 150, 0x21, 0x00},
\r
199 { 170, 0x02, 0x00}, { 180, 0x12, 0x00}, { 200, 0x22, 0x00},
\r
200 { 220, 0x03, 0x01}, { 240, 0x13, 0x01}, { 250, 0x23, 0x01},
\r
201 { 270, 0x04, 0x01}, { 300, 0x14, 0x01}, { 330, 0x05, 0x02},
\r
202 { 360, 0x15, 0x02}, { 400, 0x25, 0x02}, { 450, 0x06, 0x02},
\r
203 { 500, 0x16, 0x02}, { 550, 0x07, 0x03}, { 600, 0x17, 0x03},
\r
204 { 650, 0x08, 0x03}, { 700, 0x18, 0x03}, { 750, 0x09, 0x04},
\r
205 { 800, 0x19, 0x04}, { 850, 0x29, 0x04}, { 900, 0x39, 0x04},
\r
206 { 950, 0x0A, 0x05}, {1000, 0x1A, 0x05}, {1050, 0x2A, 0x05},
\r
207 {1100, 0x3A, 0x05}, {1150, 0x0B, 0x06}, {1200, 0x1B, 0x06},
\r
208 {1250, 0x2B, 0x06}, {1300, 0x3B, 0x06}, {1350, 0x0C, 0x07},
\r
209 {1400, 0x1C, 0x07}, {1450, 0x2C, 0x07}, {1500, 0x3C, 0x07}
\r
214 return ERR_DSI_INVALID_INSTANCE;
\r
216 if (phy->status < INITIALIZED)
\r
218 return ERR_DSI_INVALID_INSTANCE;
\r
220 if (output_freq < MIN_OUTPUT_FREQ)
\r
222 return ERR_DSI_PHY_FREQ_OUT_OF_BOUND;
\r
225 loop_divider = ((output_freq * (phy->reference_freq / DPHY_DIV_LOWER_LIMIT)) / phy->reference_freq);
\r
226 /* here delta will account for the rounding */
\r
227 delta = ((loop_divider * phy->reference_freq) / (phy->reference_freq / DPHY_DIV_LOWER_LIMIT)) - output_freq;
\r
228 for (input_divider = 1 + (phy->reference_freq / DPHY_DIV_UPPER_LIMIT); ((phy->reference_freq / input_divider) >= DPHY_DIV_LOWER_LIMIT) && (!flag); input_divider++)
\r
230 tmp_loop_divider = ((output_freq * input_divider) / (phy->reference_freq));
\r
231 if ((tmp_loop_divider % 2) == 0)
\r
233 if (output_freq == (tmp_loop_divider * (phy->reference_freq / input_divider)))
\r
234 { /* exact values found */
\r
236 loop_divider = tmp_loop_divider;
\r
237 delta = output_freq - (tmp_loop_divider * (phy->reference_freq / input_divider));
\r
238 /* variable was incremented before exiting the loop */
\r
241 if ((output_freq - (tmp_loop_divider * (phy->reference_freq / input_divider))) < delta)
\r
242 { /* values found with smaller delta */
\r
243 loop_divider = tmp_loop_divider;
\r
244 delta = output_freq - (tmp_loop_divider * (phy->reference_freq / input_divider));
\r
250 tmp_loop_divider += 1;
\r
251 if (output_freq == (tmp_loop_divider * (phy->reference_freq / input_divider)))
\r
252 { /* exact values found */
\r
254 loop_divider = tmp_loop_divider;
\r
255 delta = (tmp_loop_divider * (phy->reference_freq / input_divider)) - output_freq;
\r
256 /* variable was incremented before exiting the loop */
\r
259 if (((tmp_loop_divider * (phy->reference_freq / input_divider)) - output_freq) < delta)
\r
260 { /* values found with smaller delta */
\r
261 loop_divider = tmp_loop_divider;
\r
262 delta = (tmp_loop_divider * (phy->reference_freq / input_divider)) - output_freq;
\r
269 input_divider = step + (loop_divider * phy->reference_freq) / output_freq;
\r
270 printf("sprdfb: D-PHY: Approximated Frequency: %d KHz\n", (loop_divider * (phy->reference_freq / input_divider)));
\r
271 // phy->log_info("D-PHY: Approximated Frequency: %d KHz", (loop_divider * (phy->reference_freq / input_divider)));
\r
274 /* get the PHY in power down mode (shutdownz=0) and reset it (rstz=0) to
\r
275 avoid transient periods in PHY operation during re-configuration procedures. */
\r
276 mipi_dsih_dphy_reset(phy, 0);
\r
277 mipi_dsih_dphy_clock_en(phy, 0);
\r
278 mipi_dsih_dphy_shutdown(phy, 0);
\r
279 /* provide an initial active-high test clear pulse in TESTCLR */
\r
280 mipi_dsih_dphy_test_clear(phy, 1);
\r
281 mipi_dsih_dphy_test_clear(phy, 0);
\r
282 for(n=0;n<100;n++){
\r
286 for (range = 0; (range < (sizeof(ranges)/sizeof(ranges[0]))) && ((output_freq / 1000) > ranges[range].freq); range++)
\r
290 if (range >= (sizeof(ranges)/sizeof(ranges[0])))
\r
292 return ERR_DSI_PHY_FREQ_OUT_OF_BOUND;
\r
294 /* set up board depending on environment if any */
\r
295 if (phy->bsp_pre_config != 0)
\r
297 phy->bsp_pre_config(phy, 0);
\r
300 /* Jessica add - begin*/
\r
301 data[0] = 0x83;//0x44;//0x44;//0x40; //0x40: ok for 200 clock lane lpx /*about 52ns*/
\r
302 mipi_dsih_dphy_write(phy, 0x60, data, 1);
\r
303 // data[0] = 0x0;//0xA6;//0xC6;//0xC6;//0x86; //0x48: ok for 200 prepare time
\r
304 // mipi_dsih_dphy_write(phy, 0x61, data, 1);
\r
306 // data[0] = 0x0;//0x6a;//0x6a;//0x4a; //0x4a: ok for 200 zero time
\r
307 // mipi_dsih_dphy_write(phy, 0x62, data, 1);
\r
309 data[0] = 0x83;//0x44;//0x40;//0x40; // 0x40: ok for 200 data lane lpx /*about 52ns*/
\r
310 mipi_dsih_dphy_write(phy, 0x70, data, 1);
\r
312 // data[0] = 0x0;//0x84;//0x96;//0x96;//0x86; //0x48: ok for 200 prepare time
\r
313 // mipi_dsih_dphy_write(phy, 0x71, data, 1);
\r
315 // data[0] = 0x0;;//0x44;//0x44;//0x40; //0x4a: ok for 200 zero time
\r
316 // mipi_dsih_dphy_write(phy, 0x72, data, 1);
\r
319 //mipi_dsih_dphy_write(phy, 0x73, data, 1);
\r
322 //mipi_dsih_dphy_write(phy, 0x74, data, 1);
\r
324 /* Jessica add - end*/
\r
327 mipi_dsih_dphy_write(phy, 0x16, data, 1);
\r
329 /* setup digital part */
\r
330 /* hs frequency range [7]|[6:1]|[0]*/
\r
331 data[0] = (0 << 7) | (ranges[range].hs_freq << 1) | 0;
\r
332 //data[0] = (0 << 7) | (0x23 << 1) | 0;
\r
333 /*From ASIC, we need unmask this code to make the frequency correct*/
\r
334 mipi_dsih_dphy_write(phy, 0x44, data, 1); //Jessica remove for more accurate frequency
\r
336 /* vco range [7]|[6:3]|[2:1]|[0] */
\r
337 data[0] = (1 << 7) | (ranges[range].vco_range << 3) | (0 << 1) | 0;
\r
338 mipi_dsih_dphy_write(phy, 0x10, data, 1); //Jessica
\r
340 /* for all Gen2 testchips, bypass LP TX enable idle low power */
\r
342 mipi_dsih_dphy_write(phy, 0x32, data, 1);
\r
343 mipi_dsih_dphy_write(phy, 0x42, data, 1);
\r
344 mipi_dsih_dphy_write(phy, 0x52, data, 1);
\r
345 mipi_dsih_dphy_write(phy, 0x82, data, 1);
\r
346 mipi_dsih_dphy_write(phy, 0x92, data, 1);
\r
348 if ((loop_divider % 2) != 0)
\r
349 { /* only odd integers are allowed (1 will be subtracted upon writing,
\r
354 /* gen 2 associates the charge pump current and LPF resistor with the
\r
355 output frequency ranges (and thus we simplify here to use the
\r
356 counter/pointer of the following structure) */
\r
358 data[0] = (0x00 << 6) | (0x01 << 5) | (0x01 << 4);
\r
360 mipi_dsih_dphy_write(phy, 0x19, data, 1); //Jessica
\r
362 /* PLL Lock bypass|charge pump current [7:4]|[3:0] */
\r
363 data[0] = (0x00 << 4) | (loop_bandwidth[i].cp_current << 0);
\r
364 mipi_dsih_dphy_write(phy, 0x11, data, 1); //Jessica
\r
365 /* bypass CP default|bypass LPF default| LPF resistor [7]|[6]|[5:0] */
\r
366 data[0] = (0x01 << 7) | (0x01 << 6) |(loop_bandwidth[i].lpf_resistor << 0);
\r
367 mipi_dsih_dphy_write(phy, 0x12, data, 1);
\r
368 /* PLL input divider ratio [7:0] */
\r
369 data[0] = input_divider - 1;
\r
370 mipi_dsih_dphy_write(phy, 0x17, data, 1); //Jessica
\r
372 data[0] = 0x04; //short the delay time before BTA
\r
373 mipi_dsih_dphy_write(phy, 0x07, data, 1);
\r
376 // mipi_dsih_dphy_write(phy, 0xB0, data, 1);
\r
379 mipi_dsih_dphy_write(phy, 0x22, data, 1);
\r
380 // data[1] = mipi_dsih_dphy_test_data_out(phy);
\r
381 // MIPI_PRINT("sprdfb:mipi dphy config-->0x22 write:%x,read:%x \n",data[0],data[1]);
\r
383 #ifdef SOFT_DPHY_CALIBRATION
\r
384 data[0] = mipi_dsih_dphy_calibration(phy);
\r
386 mipi_dsih_dphy_write(phy, 0x21, data, 1);
\r
388 for(n =0;n<50;n++ );
\r
390 data[1] = mipi_dsih_dphy_test_data_out(phy);
\r
391 MIPI_PRINT("sprdfb: mipi_dsih_dphy_calibration--> data[0]= %x,data[1] = %x \n",data[0],data[1]);
\r
394 no_of_bytes = 2; /* pll loop divider (code 0x18) takes only 2 bytes (10 bits in data) */
\r
395 for (i = 0; i < no_of_bytes; i++)
\r
397 data[i] = ((uint8_t)((((loop_divider - 1) >> (5 * i)) & 0x1F) | (i << 7) ));
\r
398 /* 7 is dependent on no_of_bytes
\r
399 make sure 5 bits only of value are written at a time */
\r
402 /* PLL loop divider ratio - SET no|reserved|feedback divider [7]|[6:5]|[4:0] */
\r
403 mipi_dsih_dphy_write(phy, 0x18, data, no_of_bytes);
\r
404 mipi_dsih_dphy_no_of_lanes(phy, no_of_lanes);
\r
405 mipi_dsih_dphy_stop_wait_time(phy, 0x1C);
\r
406 mipi_dsih_dphy_clock_en(phy, 1);
\r
407 for(n=0;n<100;n++){
\r
410 mipi_dsih_dphy_shutdown(phy, 1);
\r
411 for(n=0;n<100;n++){
\r
414 mipi_dsih_dphy_reset(phy, 1);
\r
419 dsih_error_t mipi_dsih_dphy_configure(dphy_t * phy, uint8_t no_of_lanes, uint32_t output_freq)
\r
421 uint32_t loop_divider = 0; /* (M) */
\r
422 uint32_t input_divider = 1; /* (N) */
\r
423 uint8_t data[4]; /* maximum data for now are 4 bytes per test mode*/
\r
424 uint8_t no_of_bytes = 0;
\r
425 uint8_t i = 0; /* iterator */
\r
426 uint8_t n=0;/* iterator */
\r
427 uint8_t range = 0; /* ranges iterator */
\r
429 #ifdef DWC_MIPI_DPHY_BIDIR_TSMC40LP
\r
432 uint32_t freq; /* upper margin of frequency range */
\r
433 uint8_t hs_freq; /* hsfreqrange */
\r
434 uint8_t vco_range; /* vcorange */
\r
438 {90, 0x00, 0x01}, {100, 0x10, 0x01}, {110, 0x20, 0x01},
\r
439 {125, 0x01, 0x01}, {140, 0x11, 0x01}, {150, 0x21, 0x01},
\r
440 {160, 0x02, 0x01}, {180, 0x12, 0x03}, {200, 0x22, 0x03},
\r
441 {210, 0x03, 0x03}, {240, 0x13, 0x03}, {250, 0x23, 0x03},
\r
442 {270, 0x04, 0x07}, {300, 0x14, 0x07}, {330, 0x24, 0x07},
\r
443 {360, 0x15, 0x07}, {400, 0x25, 0x07}, {450, 0x06, 0x07},
\r
444 {500, 0x16, 0x07}, {550, 0x07, 0x0f}, {600, 0x17, 0x0f},
\r
445 {650, 0x08, 0x0f}, {700, 0x18, 0x0f}, {750, 0x09, 0x0f},
\r
446 {800, 0x19, 0x0f}, {850, 0x0A, 0x0f}, {900, 0x1A, 0x0f},
\r
447 {950, 0x2A, 0x0f}, {1000, 0x3A, 0x0f}
\r
451 uint32_t loop_div; /* upper limit of loop divider range */
\r
452 uint8_t cp_current; /* icpctrl */
\r
453 uint8_t lpf_resistor; /* lpfctrl */
\r
457 {32, 0x06, 0x10}, {64, 0x06, 0x10}, {128, 0x0C, 0x08},
\r
458 {256, 0x04, 0x04}, {512, 0x00, 0x01}, {768, 0x01, 0x01},
\r
461 #elif defined DPHY2Btql
\r
464 uint32_t loop_div; /* upper limit of loop divider range */
\r
465 uint8_t cp_current; /* icpctrl */
\r
466 uint8_t lpf_resistor; /* lpfctrl */
\r
470 {32, 0x0B, 0x00}, {64, 0x0A, 0x00}, {128, 0x09, 0x01},
\r
471 {256, 0x08, 0x03}, {512, 0x08, 0x07}, {768, 0x08, 0x0F},
\r
477 return ERR_DSI_INVALID_INSTANCE;
\r
479 if (phy->status < INITIALIZED)
\r
481 return ERR_DSI_INVALID_INSTANCE;
\r
483 if (output_freq < MIN_OUTPUT_FREQ)
\r
485 return ERR_DSI_PHY_FREQ_OUT_OF_BOUND;
\r
487 /* find M and N dividers */
\r
488 for (input_divider = 1 + (phy->reference_freq / DPHY_DIV_UPPER_LIMIT); ((phy->reference_freq / input_divider) >= DPHY_DIV_LOWER_LIMIT) && (!flag); input_divider++)
\r
489 { /* here the >= DPHY_DIV_LOWER_LIMIT is a phy constraint, formula should be above 1 MHz */
\r
490 if (((output_freq * input_divider) % (phy->reference_freq )) == 0)
\r
491 { /* values found */
\r
492 loop_divider = ((output_freq * input_divider) / (phy->reference_freq ));
\r
493 if (loop_divider >= 12)
\r
499 if ((!flag) || ((phy->reference_freq / input_divider) < DPHY_DIV_LOWER_LIMIT))
\r
500 { /* no exact value found in previous for loop */
\r
501 /* this solution is not favourable as jitter would be maximum */
\r
502 loop_divider = output_freq / DPHY_DIV_LOWER_LIMIT;
\r
503 input_divider = phy->reference_freq / DPHY_DIV_LOWER_LIMIT;
\r
506 { /* variable was incremented before exiting the loop */
\r
509 for (i = 0; (i < (sizeof(loop_bandwidth)/sizeof(loop_bandwidth[0]))) && (loop_divider > loop_bandwidth[i].loop_div); i++)
\r
513 if (i >= (sizeof(loop_bandwidth)/sizeof(loop_bandwidth[0])))
\r
515 return ERR_DSI_PHY_FREQ_OUT_OF_BOUND;
\r
517 printf("sprdfb: Gen1 D-PHY: Approximated Frequency: %d KHz\n", (loop_divider * (phy->reference_freq / input_divider)));
\r
518 /* get the PHY in power down mode (shutdownz=0) and reset it (rstz=0) to
\r
519 avoid transient periods in PHY operation during re-configuration procedures. */
\r
520 mipi_dsih_dphy_reset(phy, 0);
\r
521 mipi_dsih_dphy_clock_en(phy, 0);
\r
522 mipi_dsih_dphy_shutdown(phy, 0);
\r
523 /* provide an initial active-high test clear pulse in TESTCLR */
\r
524 mipi_dsih_dphy_test_clear(phy, 1);
\r
525 mipi_dsih_dphy_test_clear(phy, 0);
\r
526 #ifdef DWC_MIPI_DPHY_BIDIR_TSMC40LP
\r
528 for (range = 0; (range < (sizeof(ranges)/sizeof(ranges[0]))) && ((output_freq / 1000) > ranges[range].freq); range++)
\r
532 if (range >= (sizeof(ranges)/sizeof(ranges[0])))
\r
534 return ERR_DSI_PHY_FREQ_OUT_OF_BOUND;
\r
536 /* set up board depending on environment if any */
\r
537 if (phy->bsp_pre_config != 0)
\r
539 phy->bsp_pre_config(phy, 0);
\r
542 /* Jessica add - begin*/
\r
543 data[0] = 0x42;//0x44;//0x44;//0x40; //0x40: ok for 200 clock lane lpx /*about 52ns*/
\r
544 mipi_dsih_dphy_write(phy, 0x60, data, 1);
\r
545 // data[0] = 0x0;//0xA6;//0xC6;//0xC6;//0x86; //0x48: ok for 200 prepare time
\r
546 // mipi_dsih_dphy_write(phy, 0x61, data, 1);
\r
548 // data[0] = 0x0;//0x6a;//0x6a;//0x4a; //0x4a: ok for 200 zero time
\r
549 // mipi_dsih_dphy_write(phy, 0x62, data, 1);
\r
551 data[0] = 0x42;//0x44;//0x40;//0x40; // 0x40: ok for 200 data lane lpx /*about 52ns*/
\r
552 mipi_dsih_dphy_write(phy, 0x70, data, 1);
\r
554 // data[0] = 0x0;//0x84;//0x96;//0x96;//0x86; //0x48: ok for 200 prepare time
\r
555 // mipi_dsih_dphy_write(phy, 0x71, data, 1);
\r
557 // data[0] = 0x0;;//0x44;//0x44;//0x40; //0x4a: ok for 200 zero time
\r
558 // mipi_dsih_dphy_write(phy, 0x72, data, 1);
\r
561 //mipi_dsih_dphy_write(phy, 0x73, data, 1);
\r
564 //mipi_dsih_dphy_write(phy, 0x74, data, 1);
\r
566 /* Jessica add - end*/
\r
568 /* setup digital part */
\r
569 /* hs frequency range [7]|[6:1]|[0]*/
\r
570 data[0] = (0 << 7) | (ranges[range].hs_freq << 1) | 0;
\r
571 //data[0] = (0 << 7) | (0x23 << 1) | 0;
\r
572 /*From ASIC, we need unmask this code to make the frequency correct*/
\r
573 mipi_dsih_dphy_write(phy, 0x44, data, 1); //Jessica remove for more accurate frequency
\r
575 /* vco range [7]|[6:3]|[2:1]|[0] */
\r
576 data[0] = (1 << 7) | (ranges[range].vco_range << 3) | (0 << 1) | 0;
\r
577 mipi_dsih_dphy_write(phy, 0x10, data, 1); //Jessica
\r
578 /* PLL reserved|Input divider control|Loop Divider Control|Post Divider Ratio [7:6]|[5]|[4]|[3:0] */
\r
579 data[0] = (0x00 << 6) | (0x01 << 5) | (0x01 << 4) | (0x03 << 0); /* post divider default = 0x03 - it is only used for clock out 2*/
\r
580 mipi_dsih_dphy_write(phy, 0x19, data, 1); //Jessica
\r
581 #elif defined DPHY2Btql
\r
582 /* vco range [7:5]|[4]|[3]|[2:1]|[0] */
\r
583 data[0] = ((((output_freq / 1000) > 500 )? 1: 0) << 4) | (1 << 3) | (0 << 1) | 0;
\r
584 mipi_dsih_dphy_write(phy, 0x10, data, 1);
\r
586 /* PLL Lock bypass|charge pump current [7:4]|[3:0] */
\r
587 data[0] = (0x00 << 4) | (loop_bandwidth[i].cp_current << 0);
\r
588 mipi_dsih_dphy_write(phy, 0x11, data, 1); //Jessica
\r
589 /* bypass CP default|bypass LPF default| LPF resistor [7]|[6]|[5:0] */
\r
590 data[0] = (0x01 << 7) | (0x01 << 6) |(loop_bandwidth[i].lpf_resistor << 0);
\r
591 mipi_dsih_dphy_write(phy, 0x12, data, 1);
\r
592 /* PLL input divider ratio [7:0] */
\r
593 data[0] = input_divider - 1;
\r
594 mipi_dsih_dphy_write(phy, 0x17, data, 1); //Jessica
\r
596 data[0] = 0x04; //short the delay time before BTA
\r
597 mipi_dsih_dphy_write(phy, 0x07, data, 1);
\r
600 // mipi_dsih_dphy_write(phy, 0xB0, data, 1);
\r
603 mipi_dsih_dphy_write(phy, 0x22, data, 1);
\r
604 // data[1] = mipi_dsih_dphy_test_data_out(phy);
\r
605 // MIPI_PRINT("sprdfb:mipi dphy config-->0x22 write:%x,read:%x \n",data[0],data[1]);
\r
608 no_of_bytes = 2; /* pll loop divider (code 0x18) takes only 2 bytes (10 bits in data) */
\r
609 for (i = 0; i < no_of_bytes; i++)
\r
611 data[i] = ((uint8_t)((((loop_divider - 1) >> (5 * i)) & 0x1F) | (i << 7) ));
\r
612 /* 7 is dependent on no_of_bytes
\r
613 make sure 5 bits only of value are written at a time */
\r
615 /* PLL loop divider ratio - SET no|reserved|feedback divider [7]|[6:5]|[4:0] */
\r
616 mipi_dsih_dphy_write(phy, 0x18, data, no_of_bytes);
\r
617 mipi_dsih_dphy_no_of_lanes(phy, no_of_lanes);
\r
618 mipi_dsih_dphy_stop_wait_time(phy, 0x1C);
\r
619 mipi_dsih_dphy_clock_en(phy, 1);
\r
620 for(n=0;n<100;n++){
\r
623 mipi_dsih_dphy_shutdown(phy, 1);
\r
624 for(n=0;n<100;n++){
\r
627 mipi_dsih_dphy_reset(phy, 1);
\r
632 * Close and power down D-PHY module
\r
633 * @param phy pointer to structure which holds information about the d-phy
\r
635 * @return error code
\r
638 dsih_error_t mipi_dsih_dphy_close(dphy_t * phy)
\r
642 return ERR_DSI_INVALID_INSTANCE;
\r
644 else if ((phy->core_read_function == 0) || (phy->core_write_function == 0))
\r
646 return ERR_DSI_INVALID_IO;
\r
648 if (phy->status < NOT_INITIALIZED)
\r
650 return ERR_DSI_INVALID_INSTANCE;
\r
652 mipi_dsih_dphy_reset(phy, 0);
\r
653 mipi_dsih_dphy_reset(phy, 1);
\r
654 mipi_dsih_dphy_shutdown(phy, 0);
\r
655 phy->status = NOT_INITIALIZED;
\r
659 * Enable clock lane module
\r
660 * @param instance pointer to structure which holds information about the d-phy
\r
664 void mipi_dsih_dphy_clock_en(dphy_t * instance, int en)
\r
666 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_RSTZ, en, 2, 1);
\r
669 * Reset D-PHY module
\r
670 * @param instance pointer to structure which holds information about the d-phy
\r
674 void mipi_dsih_dphy_reset(dphy_t * instance, int reset)
\r
676 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_RSTZ, reset, 1, 1);
\r
679 * Power up/down D-PHY module
\r
680 * @param instance pointer to structure which holds information about the d-phy
\r
682 * @param powerup (1) shutdown (0)
\r
684 void mipi_dsih_dphy_shutdown(dphy_t * instance, int powerup)
\r
686 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_RSTZ, powerup, 0, 1);
\r
689 * Configure minimum wait period for HS transmission request after a stop state
\r
690 * @param instance pointer to structure which holds information about the d-phy
\r
692 * @param no_of_byte_cycles [in byte (lane) clock cycles]
\r
694 void mipi_dsih_dphy_stop_wait_time(dphy_t * instance, uint8_t no_of_byte_cycles)
\r
696 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CFG, no_of_byte_cycles, 2, 8);
\r
699 * Set number of active lanes
\r
700 * @param instance pointer to structure which holds information about the d-phy
\r
702 * @param no_of_lanes
\r
704 void mipi_dsih_dphy_no_of_lanes(dphy_t * instance, uint8_t no_of_lanes)
\r
706 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CFG, no_of_lanes - 1, 0, 2);
\r
709 * Get number of currently active lanes
\r
710 * @param instance pointer to structure which holds information about the d-phy
\r
712 * @return number of active lanes
\r
714 uint8_t mipi_dsih_dphy_get_no_of_lanes(dphy_t * instance)
\r
716 return mipi_dsih_dphy_read_part(instance, R_DSI_HOST_PHY_IF_CFG, 0, 2);
\r
719 * Request the PHY module to start transmission of high speed clock.
\r
720 * This causes the clock lane to start transmitting DDR clock on the
\r
721 * lane interconnect.
\r
722 * @param instance pointer to structure which holds information about the d-phy
\r
725 * @note this function should be called explicitly by user always except for
\r
728 void mipi_dsih_dphy_enable_hs_clk(dphy_t * instance, int enable)
\r
730 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, enable, 0, 1);
\r
733 * One bit is asserted in the trigger_request (4bits) to cause the lane module
\r
734 * to cause the associated trigger to be sent across the lane interconnect.
\r
735 * The trigger request is synchronous with the rising edge of the clock.
\r
736 * @note: Only one bit of the trigger_request is asserted at any given time, the
\r
737 * remaining must be left set to 0, and only when not in LPDT or ULPS modes
\r
738 * @param instance pointer to structure which holds information about the d-phy
\r
740 * @param trigger_request 4 bit request
\r
742 dsih_error_t mipi_dsih_dphy_escape_mode_trigger(dphy_t * instance, uint8_t trigger_request)
\r
746 for (i = 0; i < 4; i++)
\r
748 sum += ((trigger_request >> i) & 1);
\r
751 { /* clear old trigger */
\r
752 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0x00, 5, 4);
\r
753 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, trigger_request, 5, 4);
\r
754 for (i = 0; i < DSIH_PHY_ACTIVE_WAIT; i++)
\r
756 if(mipi_dsih_dphy_status(instance, 0x0010))
\r
761 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0x00, 5, 4);
\r
762 if (i >= DSIH_PHY_ACTIVE_WAIT)
\r
764 return ERR_DSI_TIMEOUT;
\r
768 return ERR_DSI_INVALID_COMMAND;
\r
771 * ULPS mode request/exit on all active data lanes.
\r
772 * @param instance pointer to structure which holds information about the d-phy
\r
774 * @param enable (request 1/ exit 0)
\r
775 * @return error code
\r
776 * @note this is a blocking function. wait upon exiting the ULPS will exceed 1ms
\r
779 dsih_error_t mipi_dsih_dphy_ulps_data_lanes(dphy_t * instance, int enable)
\r
782 /* mask 1 0101 0010 0000 */
\r
783 uint16_t data_lanes_mask = 0;
\r
786 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 3, 1);
\r
791 if (mipi_dsih_dphy_status(instance, 0x1) == 0)
\r
793 return ERR_DSI_PHY_PLL_NOT_LOCKED;
\r
795 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 4, 1);
\r
796 switch (mipi_dsih_dphy_get_no_of_lanes(instance))
\r
799 data_lanes_mask |= (1 << 12);
\r
801 data_lanes_mask |= (1 << 10);
\r
803 data_lanes_mask |= (1 << 8);
\r
805 data_lanes_mask |= (1 << 5);
\r
808 data_lanes_mask = 0;
\r
811 for (timeout = 0; timeout < DSIH_PHY_ACTIVE_WAIT; timeout++)
\r
812 { /* verify that the DPHY has left ULPM */
\r
813 /* mask 1010100100000 */
\r
814 if (mipi_dsih_dphy_status(instance, data_lanes_mask) == data_lanes_mask)
\r
815 { /* wait at least 1ms */
\r
818 /* wait at least 1ms */
\r
819 for (timeout = 0; timeout < ONE_MS_ACTIVE_WAIT; timeout++)
\r
824 if (mipi_dsih_dphy_status(instance, data_lanes_mask) != data_lanes_mask)
\r
826 // instance->log_info("stat %x, mask %x", mipi_dsih_dphy_status(instance, data_lanes_mask), data_lanes_mask);
\r
827 return ERR_DSI_TIMEOUT;
\r
829 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 3, 1);
\r
830 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 4, 1);
\r
835 void mipi_dsih_dphy_ulps_data_lanes(dphy_t * instance, int enable)
\r
840 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 3, 1);
\r
844 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 4, 1);
\r
845 for (timeout = 0; timeout < DSIH_PHY_ACTIVE_WAIT; timeout++)
\r
846 { /* verify that the DPHY has left ULPM */
\r
847 /* mask 1010100100000 */
\r
848 if (mipi_dsih_dphy_status(instance, 0x1520) == 0)
\r
849 { /* wait at least 1ms */
\r
850 for (timeout = 0; timeout < ONE_MS_ACTIVE_WAIT; timeout++)
\r
857 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 3, 1);
\r
858 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 4, 1);
\r
863 * ULPS mode request/exit on Clock Lane.
\r
864 * @param instance pointer to structure which holds information about the
\r
866 * @param enable 1 or disable 0 of the Ultra Low Power State of the clock lane
\r
867 * @return error code
\r
868 * @note this is a blocking function. wait upon exiting the ULPS will exceed 1ms
\r
871 dsih_error_t mipi_dsih_dphy_ulps_clk_lane(dphy_t * instance, int enable)
\r
875 uint16_t clk_lane_mask = 0x0008;
\r
878 // mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 0, 1);
\r
879 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 1, 1);
\r
883 if (mipi_dsih_dphy_status(instance, 0x1) == 0)
\r
885 return ERR_DSI_PHY_PLL_NOT_LOCKED;
\r
887 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 2, 1);
\r
888 for (timeout = 0; timeout < DSIH_PHY_ACTIVE_WAIT; timeout++)
\r
889 { /* verify that the DPHY has left ULPM */
\r
890 /* mask 1010100100000 */
\r
891 if (mipi_dsih_dphy_status(instance, clk_lane_mask) == clk_lane_mask)
\r
892 { /* wait at least 1ms */
\r
893 instance->log_info("stat %x, mask %x", mipi_dsih_dphy_status(instance, clk_lane_mask), clk_lane_mask);
\r
896 /* wait at least 1ms */
\r
897 for (timeout = 0; timeout < ONE_MS_ACTIVE_WAIT; timeout++)
\r
898 { /* dummy operation for the loop not to be optimised */
\r
899 enable = mipi_dsih_dphy_status(instance, clk_lane_mask);
\r
902 if (mipi_dsih_dphy_status(instance, clk_lane_mask) != clk_lane_mask)
\r
904 return ERR_DSI_TIMEOUT;
\r
906 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 1, 1);
\r
907 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 2, 1);
\r
912 void mipi_dsih_dphy_ulps_clk_lane(dphy_t * instance, int enable)
\r
917 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 0, 1);
\r
918 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 1, 1);
\r
922 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 1, 2, 1);
\r
923 for (timeout = 0; timeout < DSIH_PHY_ACTIVE_WAIT; timeout++)
\r
924 { /* verify that the DPHY has left ULPM */
\r
925 /* mask 1010100100000 */
\r
926 if (mipi_dsih_dphy_status(instance, 0x0004) == 0)
\r
927 { /* wait at least 1ms */
\r
928 for (timeout = 0; timeout < ONE_MS_ACTIVE_WAIT; timeout++)
\r
935 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 1, 1);
\r
936 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_IF_CTRL, 0, 2, 1);
\r
941 * Get D-PHY PPI status
\r
942 * @param instance pointer to structure which holds information about the d-phy
\r
947 uint32_t mipi_dsih_dphy_status(dphy_t * instance, uint16_t mask)
\r
949 return mipi_dsih_dphy_read_word(instance, R_DSI_HOST_PHY_STATUS) & mask;
\r
952 * @param instance pointer to structure which holds information about the d-phy
\r
956 void mipi_dsih_dphy_test_clock(dphy_t * instance, int value)
\r
958 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_TST_CRTL0, value, 1, 1);
\r
961 * @param instance pointer to structure which holds information about the d-phy
\r
965 void mipi_dsih_dphy_test_clear(dphy_t * instance, int value)
\r
967 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_TST_CRTL0, value, 0, 1);
\r
970 * @param instance pointer to structure which holds information about the d-phy
\r
972 * @param on_falling_edge
\r
974 void mipi_dsih_dphy_test_en(dphy_t * instance, uint8_t on_falling_edge)
\r
976 mipi_dsih_dphy_write_part(instance, R_DSI_HOST_PHY_TST_CRTL1, on_falling_edge, 16, 1);
\r
979 * @param instance pointer to structure which holds information about the d-phy
\r
982 uint8_t mipi_dsih_dphy_test_data_out(dphy_t * instance)
\r
984 return mipi_dsih_dphy_read_part(instance, R_DSI_HOST_PHY_TST_CRTL1, 8, 8);
\r
987 * @param instance pointer to structure which holds information about the d-phy
\r
991 void mipi_dsih_dphy_test_data_in(dphy_t * instance, uint8_t test_data)
\r
993 mipi_dsih_dphy_write_word(instance, R_DSI_HOST_PHY_TST_CRTL1, test_data);
\r
996 * Write to D-PHY module (encapsulating the digital interface)
\r
997 * @param instance pointer to structure which holds information about the d-phy
\r
999 * @param address offset inside the D-PHY digital interface
\r
1000 * @param data array of bytes to be written to D-PHY
\r
1001 * @param data_length of the data array
\r
1003 void mipi_dsih_dphy_write(dphy_t * instance, uint8_t address, uint8_t * data, uint8_t data_length)
\r
1008 #if ((defined DWC_MIPI_DPHY_BIDIR_TSMC40LP) || (defined DPHY2Btql) || (defined GEN_2))
\r
1009 /* set the TESTCLK input high in preparation to latch in the desired test mode */
\r
1010 mipi_dsih_dphy_test_clock(instance, 1);
\r
1011 /* set the desired test code in the input 8-bit bus TESTDIN[7:0] */
\r
1012 mipi_dsih_dphy_test_data_in(instance, address);
\r
1013 /* set TESTEN input high */
\r
1014 mipi_dsih_dphy_test_en(instance, 1);
\r
1015 /* drive the TESTCLK input low; the falling edge captures the chosen test code into the transceiver */
\r
1016 mipi_dsih_dphy_test_clock(instance, 0);
\r
1017 /* set TESTEN input low to disable further test mode code latching */
\r
1018 mipi_dsih_dphy_test_en(instance, 0);
\r
1019 /* start writing MSB first */
\r
1020 for (i = data_length; i > 0; i--)
\r
1021 { /* set TESTDIN[7:0] to the desired test data appropriate to the chosen test mode */
\r
1022 mipi_dsih_dphy_test_data_in(instance, data[i - 1]);
\r
1023 /* pulse TESTCLK high to capture this test data into the macrocell; repeat these two steps as necessary */
\r
1024 mipi_dsih_dphy_test_clock(instance, 1);
\r
1025 mipi_dsih_dphy_test_clock(instance, 0);
\r
1033 /* abstracting BSP */
\r
1035 * Write to whole register to D-PHY module (encapsulating the bus interface)
\r
1036 * @param instance pointer to structure which holds information about the d-phy
\r
1038 * @param reg_address offset
\r
1039 * @param data 32-bit word
\r
1041 void mipi_dsih_dphy_write_word(dphy_t * instance, uint32_t reg_address, uint32_t data)
\r
1043 if (instance->core_write_function != 0)
\r
1045 instance->core_write_function(instance->address, reg_address, data);
\r
1049 * Write bit field to D-PHY module (encapsulating the bus interface)
\r
1050 * @param instance pointer to structure which holds information about the d-phy
\r
1052 * @param reg_address offset
\r
1053 * @param data bits to be written to D-PHY
\r
1054 * @param shift from the right hand side of the register (big endian)
\r
1055 * @param width of the bit field
\r
1057 void mipi_dsih_dphy_write_part(dphy_t * instance, uint32_t reg_address, uint32_t data, uint8_t shift, uint8_t width)
\r
1059 uint32_t mask = 0;
\r
1060 uint32_t temp = 0;
\r
1061 if (instance->core_read_function != 0)
\r
1063 mask = (1 << width) - 1;
\r
1064 temp = mipi_dsih_dphy_read_word(instance, reg_address);
\r
1065 temp &= ~(mask << shift);
\r
1066 temp |= (data & mask) << shift;
\r
1067 mipi_dsih_dphy_write_word(instance, reg_address, temp);
\r
1071 * Read whole register from D-PHY module (encapsulating the bus interface)
\r
1072 * @param instance pointer to structure which holds information about the d-phy
\r
1074 * @param reg_address offset
\r
1075 * @return data 32-bit word
\r
1077 uint32_t mipi_dsih_dphy_read_word(dphy_t * instance, uint32_t reg_address)
\r
1079 if (instance->core_read_function == 0)
\r
1081 return ERR_DSI_INVALID_IO;
\r
1083 return instance->core_read_function(instance->address, reg_address);
\r
1086 * Read bit field from D-PHY module (encapsulating the bus interface)
\r
1087 * @param instance pointer to structure which holds information about the d-phy
\r
1089 * @param reg_address offset
\r
1090 * @param shift from the right hand side of the register (big endian)
\r
1091 * @param width of the bit field
\r
1092 * @return data bits to be written to D-PHY
\r
1094 uint32_t mipi_dsih_dphy_read_part(dphy_t * instance, uint32_t reg_address, uint8_t shift, uint8_t width)
\r
1096 return (mipi_dsih_dphy_read_word(instance, reg_address) >> shift) & ((1 << width) - 1);
\r