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771fe6b9 JG |
1 | /* |
2 | * Copyright 2007-8 Advanced Micro Devices, Inc. | |
3 | * Copyright 2008 Red Hat Inc. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: Dave Airlie | |
24 | * Alex Deucher | |
25 | */ | |
26 | #include "drmP.h" | |
27 | #include "radeon_drm.h" | |
28 | #include "radeon.h" | |
40bacf16 | 29 | #include "atom.h" |
771fe6b9 JG |
30 | |
31 | /** | |
32 | * radeon_ddc_probe | |
33 | * | |
34 | */ | |
35 | bool radeon_ddc_probe(struct radeon_connector *radeon_connector) | |
36 | { | |
37 | u8 out_buf[] = { 0x0, 0x0}; | |
38 | u8 buf[2]; | |
39 | int ret; | |
40 | struct i2c_msg msgs[] = { | |
41 | { | |
42 | .addr = 0x50, | |
43 | .flags = 0, | |
44 | .len = 1, | |
45 | .buf = out_buf, | |
46 | }, | |
47 | { | |
48 | .addr = 0x50, | |
49 | .flags = I2C_M_RD, | |
50 | .len = 1, | |
51 | .buf = buf, | |
52 | } | |
53 | }; | |
54 | ||
55 | ret = i2c_transfer(&radeon_connector->ddc_bus->adapter, msgs, 2); | |
56 | if (ret == 2) | |
57 | return true; | |
58 | ||
59 | return false; | |
60 | } | |
61 | ||
62 | ||
5a6f98f5 | 63 | static void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) |
771fe6b9 | 64 | { |
ab1e9ea0 AD |
65 | struct radeon_device *rdev = i2c->dev->dev_private; |
66 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
771fe6b9 | 67 | uint32_t temp; |
771fe6b9 JG |
68 | |
69 | /* RV410 appears to have a bug where the hw i2c in reset | |
70 | * holds the i2c port in a bad state - switch hw i2c away before | |
71 | * doing DDC - do this for all r200s/r300s/r400s for safety sake | |
72 | */ | |
6a93cb25 AD |
73 | if (rec->hw_capable) { |
74 | if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) { | |
40bacf16 AD |
75 | u32 reg; |
76 | ||
77 | if (rdev->family >= CHIP_RV350) | |
78 | reg = RADEON_GPIO_MONID; | |
79 | else if ((rdev->family == CHIP_R300) || | |
80 | (rdev->family == CHIP_R350)) | |
81 | reg = RADEON_GPIO_DVI_DDC; | |
82 | else | |
83 | reg = RADEON_GPIO_CRT2_DDC; | |
84 | ||
85 | mutex_lock(&rdev->dc_hw_i2c_mutex); | |
86 | if (rec->a_clk_reg == reg) { | |
6a93cb25 AD |
87 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | |
88 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1))); | |
89 | } else { | |
90 | WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | | |
91 | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3))); | |
92 | } | |
40bacf16 | 93 | mutex_unlock(&rdev->dc_hw_i2c_mutex); |
771fe6b9 JG |
94 | } |
95 | } | |
771fe6b9 | 96 | |
9b9fe724 AD |
97 | /* clear the output pin values */ |
98 | temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask; | |
99 | WREG32(rec->a_clk_reg, temp); | |
100 | ||
101 | temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask; | |
102 | WREG32(rec->a_data_reg, temp); | |
103 | ||
6a93cb25 AD |
104 | /* set the pins to input */ |
105 | temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; | |
106 | WREG32(rec->en_clk_reg, temp); | |
107 | ||
108 | temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask; | |
109 | WREG32(rec->en_data_reg, temp); | |
9b9fe724 AD |
110 | |
111 | /* mask the gpio pins for software use */ | |
771fe6b9 JG |
112 | temp = RREG32(rec->mask_clk_reg); |
113 | if (lock_state) | |
114 | temp |= rec->mask_clk_mask; | |
115 | else | |
116 | temp &= ~rec->mask_clk_mask; | |
117 | WREG32(rec->mask_clk_reg, temp); | |
118 | temp = RREG32(rec->mask_clk_reg); | |
119 | ||
120 | temp = RREG32(rec->mask_data_reg); | |
121 | if (lock_state) | |
122 | temp |= rec->mask_data_mask; | |
123 | else | |
124 | temp &= ~rec->mask_data_mask; | |
125 | WREG32(rec->mask_data_reg, temp); | |
126 | temp = RREG32(rec->mask_data_reg); | |
127 | } | |
128 | ||
129 | static int get_clock(void *i2c_priv) | |
130 | { | |
131 | struct radeon_i2c_chan *i2c = i2c_priv; | |
132 | struct radeon_device *rdev = i2c->dev->dev_private; | |
133 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
134 | uint32_t val; | |
135 | ||
9b9fe724 AD |
136 | /* read the value off the pin */ |
137 | val = RREG32(rec->y_clk_reg); | |
138 | val &= rec->y_clk_mask; | |
771fe6b9 JG |
139 | |
140 | return (val != 0); | |
141 | } | |
142 | ||
143 | ||
144 | static int get_data(void *i2c_priv) | |
145 | { | |
146 | struct radeon_i2c_chan *i2c = i2c_priv; | |
147 | struct radeon_device *rdev = i2c->dev->dev_private; | |
148 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
149 | uint32_t val; | |
150 | ||
9b9fe724 AD |
151 | /* read the value off the pin */ |
152 | val = RREG32(rec->y_data_reg); | |
153 | val &= rec->y_data_mask; | |
154 | ||
771fe6b9 JG |
155 | return (val != 0); |
156 | } | |
157 | ||
158 | static void set_clock(void *i2c_priv, int clock) | |
159 | { | |
160 | struct radeon_i2c_chan *i2c = i2c_priv; | |
161 | struct radeon_device *rdev = i2c->dev->dev_private; | |
162 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
163 | uint32_t val; | |
164 | ||
9b9fe724 AD |
165 | /* set pin direction */ |
166 | val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask; | |
167 | val |= clock ? 0 : rec->en_clk_mask; | |
168 | WREG32(rec->en_clk_reg, val); | |
771fe6b9 JG |
169 | } |
170 | ||
171 | static void set_data(void *i2c_priv, int data) | |
172 | { | |
173 | struct radeon_i2c_chan *i2c = i2c_priv; | |
174 | struct radeon_device *rdev = i2c->dev->dev_private; | |
175 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
176 | uint32_t val; | |
177 | ||
9b9fe724 AD |
178 | /* set pin direction */ |
179 | val = RREG32(rec->en_data_reg) & ~rec->en_data_mask; | |
180 | val |= data ? 0 : rec->en_data_mask; | |
181 | WREG32(rec->en_data_reg, val); | |
771fe6b9 JG |
182 | } |
183 | ||
40bacf16 AD |
184 | /* hw i2c engine for r1xx-4xx hardware |
185 | * hw can buffer up to 15 bytes | |
186 | */ | |
187 | static int r100_hw_i2c_xfer(struct i2c_adapter *i2c_adap, | |
188 | struct i2c_msg *msgs, int num) | |
189 | { | |
190 | struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); | |
191 | struct radeon_device *rdev = i2c->dev->dev_private; | |
192 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
193 | struct i2c_msg *p; | |
194 | int i, j, k, ret = num; | |
57fcab62 | 195 | u32 sclk, prescale; |
40bacf16 AD |
196 | u32 i2c_cntl_0, i2c_cntl_1, i2c_data; |
197 | u32 tmp, reg; | |
198 | ||
199 | mutex_lock(&rdev->dc_hw_i2c_mutex); | |
57fcab62 AD |
200 | /* take the pm lock since we need a constant sclk */ |
201 | mutex_lock(&rdev->pm.mutex); | |
202 | ||
203 | sclk = radeon_get_engine_clock(rdev); | |
204 | prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128; | |
40bacf16 AD |
205 | |
206 | reg = ((prescale << RADEON_I2C_PRESCALE_SHIFT) | | |
207 | RADEON_I2C_START | | |
208 | RADEON_I2C_STOP | | |
209 | RADEON_I2C_GO); | |
210 | ||
211 | if (rdev->is_atom_bios) { | |
212 | tmp = RREG32(RADEON_BIOS_6_SCRATCH); | |
213 | WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE); | |
214 | } | |
215 | ||
216 | if (rec->mm_i2c) { | |
217 | i2c_cntl_0 = RADEON_I2C_CNTL_0; | |
218 | i2c_cntl_1 = RADEON_I2C_CNTL_1; | |
219 | i2c_data = RADEON_I2C_DATA; | |
220 | } else { | |
221 | i2c_cntl_0 = RADEON_DVI_I2C_CNTL_0; | |
222 | i2c_cntl_1 = RADEON_DVI_I2C_CNTL_1; | |
223 | i2c_data = RADEON_DVI_I2C_DATA; | |
224 | ||
225 | switch (rdev->family) { | |
226 | case CHIP_R100: | |
227 | case CHIP_RV100: | |
228 | case CHIP_RS100: | |
229 | case CHIP_RV200: | |
230 | case CHIP_RS200: | |
231 | case CHIP_RS300: | |
232 | switch (rec->mask_clk_reg) { | |
233 | case RADEON_GPIO_DVI_DDC: | |
234 | /* no gpio select bit */ | |
235 | break; | |
236 | default: | |
237 | DRM_ERROR("gpio not supported with hw i2c\n"); | |
238 | ret = -EINVAL; | |
239 | goto done; | |
240 | } | |
241 | break; | |
242 | case CHIP_R200: | |
243 | /* only bit 4 on r200 */ | |
244 | switch (rec->mask_clk_reg) { | |
245 | case RADEON_GPIO_DVI_DDC: | |
246 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); | |
247 | break; | |
248 | case RADEON_GPIO_MONID: | |
249 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); | |
250 | break; | |
251 | default: | |
252 | DRM_ERROR("gpio not supported with hw i2c\n"); | |
253 | ret = -EINVAL; | |
254 | goto done; | |
255 | } | |
256 | break; | |
257 | case CHIP_RV250: | |
258 | case CHIP_RV280: | |
259 | /* bits 3 and 4 */ | |
260 | switch (rec->mask_clk_reg) { | |
261 | case RADEON_GPIO_DVI_DDC: | |
262 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); | |
263 | break; | |
264 | case RADEON_GPIO_VGA_DDC: | |
265 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2); | |
266 | break; | |
267 | case RADEON_GPIO_CRT2_DDC: | |
268 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); | |
269 | break; | |
270 | default: | |
271 | DRM_ERROR("gpio not supported with hw i2c\n"); | |
272 | ret = -EINVAL; | |
273 | goto done; | |
274 | } | |
275 | break; | |
276 | case CHIP_R300: | |
277 | case CHIP_R350: | |
278 | /* only bit 4 on r300/r350 */ | |
279 | switch (rec->mask_clk_reg) { | |
280 | case RADEON_GPIO_VGA_DDC: | |
281 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); | |
282 | break; | |
283 | case RADEON_GPIO_DVI_DDC: | |
284 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); | |
285 | break; | |
286 | default: | |
287 | DRM_ERROR("gpio not supported with hw i2c\n"); | |
288 | ret = -EINVAL; | |
289 | goto done; | |
290 | } | |
291 | break; | |
292 | case CHIP_RV350: | |
293 | case CHIP_RV380: | |
294 | case CHIP_R420: | |
295 | case CHIP_R423: | |
296 | case CHIP_RV410: | |
297 | case CHIP_RS400: | |
298 | case CHIP_RS480: | |
299 | /* bits 3 and 4 */ | |
300 | switch (rec->mask_clk_reg) { | |
301 | case RADEON_GPIO_VGA_DDC: | |
302 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); | |
303 | break; | |
304 | case RADEON_GPIO_DVI_DDC: | |
305 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2); | |
306 | break; | |
307 | case RADEON_GPIO_MONID: | |
308 | reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); | |
309 | break; | |
310 | default: | |
311 | DRM_ERROR("gpio not supported with hw i2c\n"); | |
312 | ret = -EINVAL; | |
313 | goto done; | |
314 | } | |
315 | break; | |
316 | default: | |
317 | DRM_ERROR("unsupported asic\n"); | |
318 | ret = -EINVAL; | |
319 | goto done; | |
320 | break; | |
321 | } | |
322 | } | |
323 | ||
324 | /* check for bus probe */ | |
325 | p = &msgs[0]; | |
326 | if ((num == 1) && (p->len == 0)) { | |
327 | WREG32(i2c_cntl_0, (RADEON_I2C_DONE | | |
328 | RADEON_I2C_NACK | | |
329 | RADEON_I2C_HALT | | |
330 | RADEON_I2C_SOFT_RST)); | |
331 | WREG32(i2c_data, (p->addr << 1) & 0xff); | |
332 | WREG32(i2c_data, 0); | |
333 | WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) | | |
334 | (1 << RADEON_I2C_ADDR_COUNT_SHIFT) | | |
335 | RADEON_I2C_EN | | |
336 | (48 << RADEON_I2C_TIME_LIMIT_SHIFT))); | |
337 | WREG32(i2c_cntl_0, reg); | |
338 | for (k = 0; k < 32; k++) { | |
339 | udelay(10); | |
340 | tmp = RREG32(i2c_cntl_0); | |
341 | if (tmp & RADEON_I2C_GO) | |
342 | continue; | |
343 | tmp = RREG32(i2c_cntl_0); | |
344 | if (tmp & RADEON_I2C_DONE) | |
345 | break; | |
346 | else { | |
347 | DRM_DEBUG("i2c write error 0x%08x\n", tmp); | |
348 | WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT); | |
349 | ret = -EIO; | |
350 | goto done; | |
351 | } | |
352 | } | |
353 | goto done; | |
354 | } | |
355 | ||
356 | for (i = 0; i < num; i++) { | |
357 | p = &msgs[i]; | |
358 | for (j = 0; j < p->len; j++) { | |
359 | if (p->flags & I2C_M_RD) { | |
360 | WREG32(i2c_cntl_0, (RADEON_I2C_DONE | | |
361 | RADEON_I2C_NACK | | |
362 | RADEON_I2C_HALT | | |
363 | RADEON_I2C_SOFT_RST)); | |
364 | WREG32(i2c_data, ((p->addr << 1) & 0xff) | 0x1); | |
365 | WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) | | |
366 | (1 << RADEON_I2C_ADDR_COUNT_SHIFT) | | |
367 | RADEON_I2C_EN | | |
368 | (48 << RADEON_I2C_TIME_LIMIT_SHIFT))); | |
369 | WREG32(i2c_cntl_0, reg | RADEON_I2C_RECEIVE); | |
370 | for (k = 0; k < 32; k++) { | |
371 | udelay(10); | |
372 | tmp = RREG32(i2c_cntl_0); | |
373 | if (tmp & RADEON_I2C_GO) | |
374 | continue; | |
375 | tmp = RREG32(i2c_cntl_0); | |
376 | if (tmp & RADEON_I2C_DONE) | |
377 | break; | |
378 | else { | |
379 | DRM_DEBUG("i2c read error 0x%08x\n", tmp); | |
380 | WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT); | |
381 | ret = -EIO; | |
382 | goto done; | |
383 | } | |
384 | } | |
385 | p->buf[j] = RREG32(i2c_data) & 0xff; | |
386 | } else { | |
387 | WREG32(i2c_cntl_0, (RADEON_I2C_DONE | | |
388 | RADEON_I2C_NACK | | |
389 | RADEON_I2C_HALT | | |
390 | RADEON_I2C_SOFT_RST)); | |
391 | WREG32(i2c_data, (p->addr << 1) & 0xff); | |
392 | WREG32(i2c_data, p->buf[j]); | |
393 | WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) | | |
394 | (1 << RADEON_I2C_ADDR_COUNT_SHIFT) | | |
395 | RADEON_I2C_EN | | |
396 | (48 << RADEON_I2C_TIME_LIMIT_SHIFT))); | |
397 | WREG32(i2c_cntl_0, reg); | |
398 | for (k = 0; k < 32; k++) { | |
399 | udelay(10); | |
400 | tmp = RREG32(i2c_cntl_0); | |
401 | if (tmp & RADEON_I2C_GO) | |
402 | continue; | |
403 | tmp = RREG32(i2c_cntl_0); | |
404 | if (tmp & RADEON_I2C_DONE) | |
405 | break; | |
406 | else { | |
407 | DRM_DEBUG("i2c write error 0x%08x\n", tmp); | |
408 | WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT); | |
409 | ret = -EIO; | |
410 | goto done; | |
411 | } | |
412 | } | |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | done: | |
418 | WREG32(i2c_cntl_0, 0); | |
419 | WREG32(i2c_cntl_1, 0); | |
420 | WREG32(i2c_cntl_0, (RADEON_I2C_DONE | | |
421 | RADEON_I2C_NACK | | |
422 | RADEON_I2C_HALT | | |
423 | RADEON_I2C_SOFT_RST)); | |
424 | ||
425 | if (rdev->is_atom_bios) { | |
426 | tmp = RREG32(RADEON_BIOS_6_SCRATCH); | |
427 | tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE; | |
428 | WREG32(RADEON_BIOS_6_SCRATCH, tmp); | |
429 | } | |
430 | ||
57fcab62 | 431 | mutex_unlock(&rdev->pm.mutex); |
40bacf16 AD |
432 | mutex_unlock(&rdev->dc_hw_i2c_mutex); |
433 | ||
434 | return ret; | |
435 | } | |
436 | ||
437 | /* hw i2c engine for r5xx hardware | |
438 | * hw can buffer up to 15 bytes | |
439 | */ | |
440 | static int r500_hw_i2c_xfer(struct i2c_adapter *i2c_adap, | |
441 | struct i2c_msg *msgs, int num) | |
442 | { | |
443 | struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); | |
444 | struct radeon_device *rdev = i2c->dev->dev_private; | |
445 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
446 | struct i2c_msg *p; | |
447 | int i2c_clock = 50; | |
448 | int i, j, remaining, current_count, buffer_offset, ret = num; | |
57fcab62 | 449 | u32 sclk, prescale; |
40bacf16 AD |
450 | u32 tmp, reg; |
451 | u32 saved1, saved2; | |
452 | ||
453 | mutex_lock(&rdev->dc_hw_i2c_mutex); | |
57fcab62 AD |
454 | /* take the pm lock since we need a constant sclk */ |
455 | mutex_lock(&rdev->pm.mutex); | |
456 | ||
457 | sclk = radeon_get_engine_clock(rdev); | |
458 | if (rdev->family == CHIP_R520) | |
459 | prescale = (127 << 8) + ((sclk * 10) / (4 * 127 * i2c_clock)); | |
460 | else | |
461 | prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128; | |
40bacf16 AD |
462 | |
463 | /* clear gpio mask bits */ | |
464 | tmp = RREG32(rec->mask_clk_reg); | |
465 | tmp &= ~rec->mask_clk_mask; | |
466 | WREG32(rec->mask_clk_reg, tmp); | |
467 | tmp = RREG32(rec->mask_clk_reg); | |
468 | ||
469 | tmp = RREG32(rec->mask_data_reg); | |
470 | tmp &= ~rec->mask_data_mask; | |
471 | WREG32(rec->mask_data_reg, tmp); | |
472 | tmp = RREG32(rec->mask_data_reg); | |
473 | ||
474 | /* clear pin values */ | |
475 | tmp = RREG32(rec->a_clk_reg); | |
476 | tmp &= ~rec->a_clk_mask; | |
477 | WREG32(rec->a_clk_reg, tmp); | |
478 | tmp = RREG32(rec->a_clk_reg); | |
479 | ||
480 | tmp = RREG32(rec->a_data_reg); | |
481 | tmp &= ~rec->a_data_mask; | |
482 | WREG32(rec->a_data_reg, tmp); | |
483 | tmp = RREG32(rec->a_data_reg); | |
484 | ||
485 | /* set the pins to input */ | |
486 | tmp = RREG32(rec->en_clk_reg); | |
487 | tmp &= ~rec->en_clk_mask; | |
488 | WREG32(rec->en_clk_reg, tmp); | |
489 | tmp = RREG32(rec->en_clk_reg); | |
490 | ||
491 | tmp = RREG32(rec->en_data_reg); | |
492 | tmp &= ~rec->en_data_mask; | |
493 | WREG32(rec->en_data_reg, tmp); | |
494 | tmp = RREG32(rec->en_data_reg); | |
495 | ||
496 | /* */ | |
497 | tmp = RREG32(RADEON_BIOS_6_SCRATCH); | |
498 | WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE); | |
499 | saved1 = RREG32(AVIVO_DC_I2C_CONTROL1); | |
500 | saved2 = RREG32(0x494); | |
501 | WREG32(0x494, saved2 | 0x1); | |
502 | ||
503 | WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C); | |
504 | for (i = 0; i < 50; i++) { | |
505 | udelay(1); | |
506 | if (RREG32(AVIVO_DC_I2C_ARBITRATION) & AVIVO_DC_I2C_SW_CAN_USE_I2C) | |
507 | break; | |
508 | } | |
509 | if (i == 50) { | |
510 | DRM_ERROR("failed to get i2c bus\n"); | |
511 | ret = -EBUSY; | |
512 | goto done; | |
513 | } | |
514 | ||
40bacf16 AD |
515 | reg = AVIVO_DC_I2C_START | AVIVO_DC_I2C_STOP | AVIVO_DC_I2C_EN; |
516 | switch (rec->mask_clk_reg) { | |
517 | case AVIVO_DC_GPIO_DDC1_MASK: | |
518 | reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC1); | |
519 | break; | |
520 | case AVIVO_DC_GPIO_DDC2_MASK: | |
521 | reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC2); | |
522 | break; | |
523 | case AVIVO_DC_GPIO_DDC3_MASK: | |
524 | reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC3); | |
525 | break; | |
526 | default: | |
527 | DRM_ERROR("gpio not supported with hw i2c\n"); | |
528 | ret = -EINVAL; | |
529 | goto done; | |
530 | } | |
531 | ||
532 | /* check for bus probe */ | |
533 | p = &msgs[0]; | |
534 | if ((num == 1) && (p->len == 0)) { | |
535 | WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | | |
536 | AVIVO_DC_I2C_NACK | | |
537 | AVIVO_DC_I2C_HALT)); | |
538 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); | |
539 | udelay(1); | |
540 | WREG32(AVIVO_DC_I2C_RESET, 0); | |
541 | ||
542 | WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff); | |
543 | WREG32(AVIVO_DC_I2C_DATA, 0); | |
544 | ||
545 | WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48)); | |
546 | WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) | | |
547 | AVIVO_DC_I2C_DATA_COUNT(1) | | |
548 | (prescale << 16))); | |
549 | WREG32(AVIVO_DC_I2C_CONTROL1, reg); | |
550 | WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO); | |
551 | for (j = 0; j < 200; j++) { | |
552 | udelay(50); | |
553 | tmp = RREG32(AVIVO_DC_I2C_STATUS1); | |
554 | if (tmp & AVIVO_DC_I2C_GO) | |
555 | continue; | |
556 | tmp = RREG32(AVIVO_DC_I2C_STATUS1); | |
557 | if (tmp & AVIVO_DC_I2C_DONE) | |
558 | break; | |
559 | else { | |
560 | DRM_DEBUG("i2c write error 0x%08x\n", tmp); | |
561 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT); | |
562 | ret = -EIO; | |
563 | goto done; | |
564 | } | |
565 | } | |
566 | goto done; | |
567 | } | |
568 | ||
569 | for (i = 0; i < num; i++) { | |
570 | p = &msgs[i]; | |
571 | remaining = p->len; | |
572 | buffer_offset = 0; | |
573 | if (p->flags & I2C_M_RD) { | |
574 | while (remaining) { | |
575 | if (remaining > 15) | |
576 | current_count = 15; | |
577 | else | |
578 | current_count = remaining; | |
579 | WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | | |
580 | AVIVO_DC_I2C_NACK | | |
581 | AVIVO_DC_I2C_HALT)); | |
582 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); | |
583 | udelay(1); | |
584 | WREG32(AVIVO_DC_I2C_RESET, 0); | |
585 | ||
586 | WREG32(AVIVO_DC_I2C_DATA, ((p->addr << 1) & 0xff) | 0x1); | |
587 | WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48)); | |
588 | WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) | | |
589 | AVIVO_DC_I2C_DATA_COUNT(current_count) | | |
590 | (prescale << 16))); | |
591 | WREG32(AVIVO_DC_I2C_CONTROL1, reg | AVIVO_DC_I2C_RECEIVE); | |
592 | WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO); | |
593 | for (j = 0; j < 200; j++) { | |
594 | udelay(50); | |
595 | tmp = RREG32(AVIVO_DC_I2C_STATUS1); | |
596 | if (tmp & AVIVO_DC_I2C_GO) | |
597 | continue; | |
598 | tmp = RREG32(AVIVO_DC_I2C_STATUS1); | |
599 | if (tmp & AVIVO_DC_I2C_DONE) | |
600 | break; | |
601 | else { | |
602 | DRM_DEBUG("i2c read error 0x%08x\n", tmp); | |
603 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT); | |
604 | ret = -EIO; | |
605 | goto done; | |
606 | } | |
607 | } | |
608 | for (j = 0; j < current_count; j++) | |
609 | p->buf[buffer_offset + j] = RREG32(AVIVO_DC_I2C_DATA) & 0xff; | |
610 | remaining -= current_count; | |
611 | buffer_offset += current_count; | |
612 | } | |
613 | } else { | |
614 | while (remaining) { | |
615 | if (remaining > 15) | |
616 | current_count = 15; | |
617 | else | |
618 | current_count = remaining; | |
619 | WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | | |
620 | AVIVO_DC_I2C_NACK | | |
621 | AVIVO_DC_I2C_HALT)); | |
622 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); | |
623 | udelay(1); | |
624 | WREG32(AVIVO_DC_I2C_RESET, 0); | |
625 | ||
626 | WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff); | |
627 | for (j = 0; j < current_count; j++) | |
628 | WREG32(AVIVO_DC_I2C_DATA, p->buf[buffer_offset + j]); | |
629 | ||
630 | WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48)); | |
631 | WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) | | |
632 | AVIVO_DC_I2C_DATA_COUNT(current_count) | | |
633 | (prescale << 16))); | |
634 | WREG32(AVIVO_DC_I2C_CONTROL1, reg); | |
635 | WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO); | |
636 | for (j = 0; j < 200; j++) { | |
637 | udelay(50); | |
638 | tmp = RREG32(AVIVO_DC_I2C_STATUS1); | |
639 | if (tmp & AVIVO_DC_I2C_GO) | |
640 | continue; | |
641 | tmp = RREG32(AVIVO_DC_I2C_STATUS1); | |
642 | if (tmp & AVIVO_DC_I2C_DONE) | |
643 | break; | |
644 | else { | |
645 | DRM_DEBUG("i2c write error 0x%08x\n", tmp); | |
646 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT); | |
647 | ret = -EIO; | |
648 | goto done; | |
649 | } | |
650 | } | |
651 | remaining -= current_count; | |
652 | buffer_offset += current_count; | |
653 | } | |
654 | } | |
655 | } | |
656 | ||
657 | done: | |
658 | WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | | |
659 | AVIVO_DC_I2C_NACK | | |
660 | AVIVO_DC_I2C_HALT)); | |
661 | WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); | |
662 | udelay(1); | |
663 | WREG32(AVIVO_DC_I2C_RESET, 0); | |
664 | ||
665 | WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_DONE_USING_I2C); | |
666 | WREG32(AVIVO_DC_I2C_CONTROL1, saved1); | |
667 | WREG32(0x494, saved2); | |
668 | tmp = RREG32(RADEON_BIOS_6_SCRATCH); | |
669 | tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE; | |
670 | WREG32(RADEON_BIOS_6_SCRATCH, tmp); | |
671 | ||
57fcab62 | 672 | mutex_unlock(&rdev->pm.mutex); |
40bacf16 AD |
673 | mutex_unlock(&rdev->dc_hw_i2c_mutex); |
674 | ||
675 | return ret; | |
676 | } | |
677 | ||
678 | static int radeon_sw_i2c_xfer(struct i2c_adapter *i2c_adap, | |
679 | struct i2c_msg *msgs, int num) | |
5a6f98f5 AD |
680 | { |
681 | struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); | |
682 | int ret; | |
683 | ||
684 | radeon_i2c_do_lock(i2c, 1); | |
40bacf16 | 685 | ret = i2c_transfer(&i2c->algo.radeon.bit_adapter, msgs, num); |
5a6f98f5 AD |
686 | radeon_i2c_do_lock(i2c, 0); |
687 | ||
688 | return ret; | |
689 | } | |
690 | ||
40bacf16 AD |
691 | static int radeon_i2c_xfer(struct i2c_adapter *i2c_adap, |
692 | struct i2c_msg *msgs, int num) | |
693 | { | |
694 | struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); | |
695 | struct radeon_device *rdev = i2c->dev->dev_private; | |
696 | struct radeon_i2c_bus_rec *rec = &i2c->rec; | |
697 | int ret; | |
698 | ||
699 | switch (rdev->family) { | |
700 | case CHIP_R100: | |
701 | case CHIP_RV100: | |
702 | case CHIP_RS100: | |
703 | case CHIP_RV200: | |
704 | case CHIP_RS200: | |
705 | case CHIP_R200: | |
706 | case CHIP_RV250: | |
707 | case CHIP_RS300: | |
708 | case CHIP_RV280: | |
709 | case CHIP_R300: | |
710 | case CHIP_R350: | |
711 | case CHIP_RV350: | |
712 | case CHIP_RV380: | |
713 | case CHIP_R420: | |
714 | case CHIP_R423: | |
715 | case CHIP_RV410: | |
716 | case CHIP_RS400: | |
717 | case CHIP_RS480: | |
718 | if (rec->hw_capable) | |
719 | ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); | |
720 | else | |
721 | ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); | |
722 | break; | |
723 | case CHIP_RS600: | |
724 | case CHIP_RS690: | |
725 | case CHIP_RS740: | |
726 | /* XXX fill in hw i2c implementation */ | |
727 | ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); | |
728 | break; | |
729 | case CHIP_RV515: | |
730 | case CHIP_R520: | |
731 | case CHIP_RV530: | |
732 | case CHIP_RV560: | |
733 | case CHIP_RV570: | |
734 | case CHIP_R580: | |
735 | if (rec->hw_capable) { | |
736 | if (rec->mm_i2c) | |
737 | ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); | |
738 | else | |
739 | ret = r500_hw_i2c_xfer(i2c_adap, msgs, num); | |
740 | } else | |
741 | ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); | |
742 | break; | |
743 | case CHIP_R600: | |
744 | case CHIP_RV610: | |
745 | case CHIP_RV630: | |
746 | case CHIP_RV670: | |
747 | /* XXX fill in hw i2c implementation */ | |
748 | ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); | |
749 | break; | |
750 | case CHIP_RV620: | |
751 | case CHIP_RV635: | |
752 | case CHIP_RS780: | |
753 | case CHIP_RS880: | |
754 | case CHIP_RV770: | |
755 | case CHIP_RV730: | |
756 | case CHIP_RV710: | |
757 | case CHIP_RV740: | |
758 | /* XXX fill in hw i2c implementation */ | |
759 | ret = radeon_sw_i2c_xfer(i2c_adap, msgs, num); | |
760 | break; | |
761 | default: | |
762 | DRM_ERROR("i2c: unhandled radeon chip\n"); | |
763 | ret = -EIO; | |
764 | break; | |
765 | } | |
766 | ||
767 | return ret; | |
768 | } | |
769 | ||
5a6f98f5 AD |
770 | static u32 radeon_i2c_func(struct i2c_adapter *adap) |
771 | { | |
772 | return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; | |
773 | } | |
774 | ||
775 | static const struct i2c_algorithm radeon_i2c_algo = { | |
776 | .master_xfer = radeon_i2c_xfer, | |
777 | .functionality = radeon_i2c_func, | |
778 | }; | |
779 | ||
771fe6b9 | 780 | struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, |
ab1e9ea0 AD |
781 | struct radeon_i2c_bus_rec *rec, |
782 | const char *name) | |
771fe6b9 JG |
783 | { |
784 | struct radeon_i2c_chan *i2c; | |
785 | int ret; | |
786 | ||
9a298b2a | 787 | i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL); |
771fe6b9 JG |
788 | if (i2c == NULL) |
789 | return NULL; | |
790 | ||
5a6f98f5 AD |
791 | /* set the internal bit adapter */ |
792 | i2c->algo.radeon.bit_adapter.owner = THIS_MODULE; | |
793 | i2c_set_adapdata(&i2c->algo.radeon.bit_adapter, i2c); | |
794 | sprintf(i2c->algo.radeon.bit_adapter.name, "Radeon internal i2c bit bus %s", name); | |
795 | i2c->algo.radeon.bit_adapter.algo_data = &i2c->algo.radeon.bit_data; | |
796 | i2c->algo.radeon.bit_data.setsda = set_data; | |
797 | i2c->algo.radeon.bit_data.setscl = set_clock; | |
798 | i2c->algo.radeon.bit_data.getsda = get_data; | |
799 | i2c->algo.radeon.bit_data.getscl = get_clock; | |
800 | i2c->algo.radeon.bit_data.udelay = 20; | |
771fe6b9 JG |
801 | /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always |
802 | * make this, 2 jiffies is a lot more reliable */ | |
5a6f98f5 AD |
803 | i2c->algo.radeon.bit_data.timeout = 2; |
804 | i2c->algo.radeon.bit_data.data = i2c; | |
805 | ret = i2c_bit_add_bus(&i2c->algo.radeon.bit_adapter); | |
806 | if (ret) { | |
40bacf16 | 807 | DRM_ERROR("Failed to register internal bit i2c %s\n", name); |
5a6f98f5 AD |
808 | goto out_free; |
809 | } | |
810 | /* set the radeon i2c adapter */ | |
40bacf16 AD |
811 | i2c->dev = dev; |
812 | i2c->rec = *rec; | |
5a6f98f5 AD |
813 | i2c->adapter.owner = THIS_MODULE; |
814 | i2c_set_adapdata(&i2c->adapter, i2c); | |
815 | sprintf(i2c->adapter.name, "Radeon i2c %s", name); | |
816 | i2c->adapter.algo_data = &i2c->algo.radeon; | |
817 | i2c->adapter.algo = &radeon_i2c_algo; | |
818 | ret = i2c_add_adapter(&i2c->adapter); | |
771fe6b9 | 819 | if (ret) { |
40bacf16 | 820 | DRM_ERROR("Failed to register i2c %s\n", name); |
771fe6b9 JG |
821 | goto out_free; |
822 | } | |
823 | ||
824 | return i2c; | |
825 | out_free: | |
9a298b2a | 826 | kfree(i2c); |
771fe6b9 JG |
827 | return NULL; |
828 | ||
829 | } | |
830 | ||
746c1aa4 | 831 | struct radeon_i2c_chan *radeon_i2c_create_dp(struct drm_device *dev, |
6a93cb25 AD |
832 | struct radeon_i2c_bus_rec *rec, |
833 | const char *name) | |
746c1aa4 DA |
834 | { |
835 | struct radeon_i2c_chan *i2c; | |
836 | int ret; | |
837 | ||
838 | i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL); | |
839 | if (i2c == NULL) | |
840 | return NULL; | |
841 | ||
6a93cb25 | 842 | i2c->rec = *rec; |
746c1aa4 DA |
843 | i2c->adapter.owner = THIS_MODULE; |
844 | i2c->dev = dev; | |
845 | i2c_set_adapdata(&i2c->adapter, i2c); | |
846 | i2c->adapter.algo_data = &i2c->algo.dp; | |
847 | i2c->algo.dp.aux_ch = radeon_dp_i2c_aux_ch; | |
848 | i2c->algo.dp.address = 0; | |
849 | ret = i2c_dp_aux_add_bus(&i2c->adapter); | |
850 | if (ret) { | |
851 | DRM_INFO("Failed to register i2c %s\n", name); | |
852 | goto out_free; | |
853 | } | |
854 | ||
855 | return i2c; | |
856 | out_free: | |
857 | kfree(i2c); | |
858 | return NULL; | |
859 | ||
860 | } | |
861 | ||
771fe6b9 | 862 | void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) |
5a6f98f5 AD |
863 | { |
864 | if (!i2c) | |
865 | return; | |
866 | i2c_del_adapter(&i2c->algo.radeon.bit_adapter); | |
867 | i2c_del_adapter(&i2c->adapter); | |
868 | kfree(i2c); | |
869 | } | |
870 | ||
871 | void radeon_i2c_destroy_dp(struct radeon_i2c_chan *i2c) | |
771fe6b9 JG |
872 | { |
873 | if (!i2c) | |
874 | return; | |
875 | ||
876 | i2c_del_adapter(&i2c->adapter); | |
9a298b2a | 877 | kfree(i2c); |
771fe6b9 JG |
878 | } |
879 | ||
880 | struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) | |
881 | { | |
882 | return NULL; | |
883 | } | |
fcec570b | 884 | |
5a6f98f5 AD |
885 | void radeon_i2c_get_byte(struct radeon_i2c_chan *i2c_bus, |
886 | u8 slave_addr, | |
887 | u8 addr, | |
888 | u8 *val) | |
fcec570b AD |
889 | { |
890 | u8 out_buf[2]; | |
891 | u8 in_buf[2]; | |
892 | struct i2c_msg msgs[] = { | |
893 | { | |
894 | .addr = slave_addr, | |
895 | .flags = 0, | |
896 | .len = 1, | |
897 | .buf = out_buf, | |
898 | }, | |
899 | { | |
900 | .addr = slave_addr, | |
901 | .flags = I2C_M_RD, | |
902 | .len = 1, | |
903 | .buf = in_buf, | |
904 | } | |
905 | }; | |
906 | ||
907 | out_buf[0] = addr; | |
908 | out_buf[1] = 0; | |
909 | ||
910 | if (i2c_transfer(&i2c_bus->adapter, msgs, 2) == 2) { | |
911 | *val = in_buf[0]; | |
912 | DRM_DEBUG("val = 0x%02x\n", *val); | |
913 | } else { | |
914 | DRM_ERROR("i2c 0x%02x 0x%02x read failed\n", | |
915 | addr, *val); | |
916 | } | |
917 | } | |
918 | ||
5a6f98f5 AD |
919 | void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c_bus, |
920 | u8 slave_addr, | |
921 | u8 addr, | |
922 | u8 val) | |
fcec570b AD |
923 | { |
924 | uint8_t out_buf[2]; | |
925 | struct i2c_msg msg = { | |
926 | .addr = slave_addr, | |
927 | .flags = 0, | |
928 | .len = 2, | |
929 | .buf = out_buf, | |
930 | }; | |
931 | ||
932 | out_buf[0] = addr; | |
933 | out_buf[1] = val; | |
934 | ||
935 | if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) | |
936 | DRM_ERROR("i2c 0x%02x 0x%02x write failed\n", | |
937 | addr, val); | |
938 | } | |
939 |