1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/module.h>
3 #include <linux/i2c.h>
4 #include <linux/dmi.h>
5 #include <linux/efi.h>
6 #include <linux/pci.h>
7 #include <linux/acpi.h>
8 #include <linux/clk.h>
9 #include <linux/delay.h>
10 #include <media/v4l2-subdev.h>
11 #include <linux/mfd/intel_soc_pmic.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/gpio.h>
15 #include <linux/platform_device.h>
16 #include "../../include/linux/atomisp_platform.h"
17 #include "../../include/linux/atomisp_gmin_platform.h"
18
19 #define MAX_SUBDEVS 8
20
21 enum clock_rate {
22 VLV2_CLK_XTAL_25_0MHz = 0,
23 VLV2_CLK_PLL_19P2MHZ = 1
24 };
25
26 #define CLK_RATE_19_2MHZ 19200000
27 #define CLK_RATE_25_0MHZ 25000000
28
29 /* Valid clock number range from 0 to 5 */
30 #define MAX_CLK_COUNT 5
31
32 /* X-Powers AXP288 register set */
33 #define ALDO1_SEL_REG 0x28
34 #define ALDO1_CTRL3_REG 0x13
35 #define ALDO1_2P8V 0x16
36 #define ALDO1_CTRL3_SHIFT 0x05
37
38 #define ELDO_CTRL_REG 0x12
39
40 #define ELDO1_SEL_REG 0x19
41 #define ELDO1_1P6V 0x12
42 #define ELDO1_CTRL_SHIFT 0x00
43
44 #define ELDO2_SEL_REG 0x1a
45 #define ELDO2_1P8V 0x16
46 #define ELDO2_CTRL_SHIFT 0x01
47
48 /* TI SND9039 PMIC register set */
49 #define LDO9_REG 0x49
50 #define LDO10_REG 0x4a
51 #define LDO11_REG 0x4b
52
53 #define LDO_2P8V_ON 0x2f /* 0x2e selects 2.85V ... */
54 #define LDO_2P8V_OFF 0x2e /* ... bottom bit is "enabled" */
55
56 #define LDO_1P8V_ON 0x59 /* 0x58 selects 1.80V ... */
57 #define LDO_1P8V_OFF 0x58 /* ... bottom bit is "enabled" */
58
59 /* CRYSTAL COVE PMIC register set */
60 #define CRYSTAL_BYT_1P8V_REG 0x5d
61 #define CRYSTAL_BYT_2P8V_REG 0x66
62
63 #define CRYSTAL_CHT_1P8V_REG 0x57
64 #define CRYSTAL_CHT_2P8V_REG 0x5d
65
66 #define CRYSTAL_ON 0x63
67 #define CRYSTAL_OFF 0x62
68
69 struct gmin_subdev {
70 struct v4l2_subdev *subdev;
71 enum clock_rate clock_src;
72 struct clk *pmc_clk;
73 struct gpio_desc *gpio0;
74 struct gpio_desc *gpio1;
75 struct regulator *v1p8_reg;
76 struct regulator *v2p8_reg;
77 struct regulator *v1p2_reg;
78 struct regulator *v2p8_vcm_reg;
79 enum atomisp_camera_port csi_port;
80 unsigned int csi_lanes;
81 enum atomisp_input_format csi_fmt;
82 enum atomisp_bayer_order csi_bayer;
83
84 bool clock_on;
85 bool v1p8_on;
86 bool v2p8_on;
87 bool v1p2_on;
88 bool v2p8_vcm_on;
89
90 int v1p8_gpio;
91 int v2p8_gpio;
92
93 u8 pwm_i2c_addr;
94
95 /* For PMIC AXP */
96 int eldo1_sel_reg, eldo1_1p6v, eldo1_ctrl_shift;
97 int eldo2_sel_reg, eldo2_1p8v, eldo2_ctrl_shift;
98 };
99
100 static struct gmin_subdev gmin_subdevs[MAX_SUBDEVS];
101
102 /* ACPI HIDs for the PMICs that could be used by this driver */
103 #define PMIC_ACPI_AXP "INT33F4" /* XPower AXP288 PMIC */
104 #define PMIC_ACPI_TI "INT33F5" /* Dollar Cove TI PMIC */
105 #define PMIC_ACPI_CRYSTALCOVE "INT33FD" /* Crystal Cove PMIC */
106
107 #define PMIC_PLATFORM_TI "intel_soc_pmic_chtdc_ti"
108
109 static enum {
110 PMIC_UNSET = 0,
111 PMIC_REGULATOR,
112 PMIC_AXP,
113 PMIC_TI,
114 PMIC_CRYSTALCOVE
115 } pmic_id;
116
117 static const char *pmic_name[] = {
118 [PMIC_UNSET] = "ACPI device PM",
119 [PMIC_REGULATOR] = "regulator driver",
120 [PMIC_AXP] = "XPower AXP288 PMIC",
121 [PMIC_TI] = "Dollar Cove TI PMIC",
122 [PMIC_CRYSTALCOVE] = "Crystal Cove PMIC",
123 };
124
125 static DEFINE_MUTEX(gmin_regulator_mutex);
126 static int gmin_v1p8_enable_count;
127 static int gmin_v2p8_enable_count;
128
129 /* The atomisp uses type==0 for the end-of-list marker, so leave space. */
130 static struct intel_v4l2_subdev_table pdata_subdevs[MAX_SUBDEVS + 1];
131
132 static const struct atomisp_platform_data pdata = {
133 .subdevs = pdata_subdevs,
134 };
135
136 static LIST_HEAD(vcm_devices);
137 static DEFINE_MUTEX(vcm_lock);
138
139 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev);
140
atomisp_get_platform_data(void)141 const struct atomisp_platform_data *atomisp_get_platform_data(void)
142 {
143 return &pdata;
144 }
145 EXPORT_SYMBOL_GPL(atomisp_get_platform_data);
146
atomisp_register_i2c_module(struct v4l2_subdev * subdev,struct camera_sensor_platform_data * plat_data,enum intel_v4l2_subdev_type type)147 int atomisp_register_i2c_module(struct v4l2_subdev *subdev,
148 struct camera_sensor_platform_data *plat_data,
149 enum intel_v4l2_subdev_type type)
150 {
151 int i;
152 struct gmin_subdev *gs;
153 struct i2c_client *client = v4l2_get_subdevdata(subdev);
154 struct acpi_device *adev = ACPI_COMPANION(&client->dev);
155
156 dev_info(&client->dev, "register atomisp i2c module type %d\n", type);
157
158 /* The windows driver model (and thus most BIOSes by default)
159 * uses ACPI runtime power management for camera devices, but
160 * we don't. Disable it, or else the rails will be needlessly
161 * tickled during suspend/resume. This has caused power and
162 * performance issues on multiple devices.
163 */
164
165 /*
166 * Turn off the device before disabling ACPI power resources
167 * (the sensor driver has already probed it at this point).
168 * This avoids leaking the reference count of the (possibly shared)
169 * ACPI power resources which were enabled/referenced before probe().
170 */
171 acpi_device_set_power(adev, ACPI_STATE_D3_COLD);
172 adev->power.flags.power_resources = 0;
173
174 for (i = 0; i < MAX_SUBDEVS; i++)
175 if (!pdata.subdevs[i].type)
176 break;
177
178 if (pdata.subdevs[i].type)
179 return -ENOMEM;
180
181 /* Note subtlety of initialization order: at the point where
182 * this registration API gets called, the platform data
183 * callbacks have probably already been invoked, so the
184 * gmin_subdev struct is already initialized for us.
185 */
186 gs = find_gmin_subdev(subdev);
187 if (!gs)
188 return -ENODEV;
189
190 pdata.subdevs[i].type = type;
191 pdata.subdevs[i].port = gs->csi_port;
192 pdata.subdevs[i].lanes = gs->csi_lanes;
193 pdata.subdevs[i].subdev = subdev;
194 return 0;
195 }
196 EXPORT_SYMBOL_GPL(atomisp_register_i2c_module);
197
atomisp_gmin_remove_subdev(struct v4l2_subdev * sd)198 int atomisp_gmin_remove_subdev(struct v4l2_subdev *sd)
199 {
200 int i, j;
201
202 if (!sd)
203 return 0;
204
205 for (i = 0; i < MAX_SUBDEVS; i++) {
206 if (pdata.subdevs[i].subdev == sd) {
207 for (j = i + 1; j <= MAX_SUBDEVS; j++)
208 pdata.subdevs[j - 1] = pdata.subdevs[j];
209 }
210 if (gmin_subdevs[i].subdev == sd) {
211 if (gmin_subdevs[i].gpio0)
212 gpiod_put(gmin_subdevs[i].gpio0);
213 gmin_subdevs[i].gpio0 = NULL;
214 if (gmin_subdevs[i].gpio1)
215 gpiod_put(gmin_subdevs[i].gpio1);
216 gmin_subdevs[i].gpio1 = NULL;
217 if (pmic_id == PMIC_REGULATOR) {
218 regulator_put(gmin_subdevs[i].v1p8_reg);
219 regulator_put(gmin_subdevs[i].v2p8_reg);
220 regulator_put(gmin_subdevs[i].v1p2_reg);
221 regulator_put(gmin_subdevs[i].v2p8_vcm_reg);
222 }
223 gmin_subdevs[i].subdev = NULL;
224 }
225 }
226 return 0;
227 }
228 EXPORT_SYMBOL_GPL(atomisp_gmin_remove_subdev);
229
230 struct gmin_cfg_var {
231 const char *name, *val;
232 };
233
234 static struct gmin_cfg_var ffrd8_vars[] = {
235 { "INTCF1B:00_ImxId", "0x134" },
236 { "INTCF1B:00_CsiPort", "1" },
237 { "INTCF1B:00_CsiLanes", "4" },
238 { "INTCF1B:00_CamClk", "0" },
239 {},
240 };
241
242 /* Cribbed from MCG defaults in the mt9m114 driver, not actually verified
243 * vs. T100 hardware
244 */
245 static struct gmin_cfg_var t100_vars[] = {
246 { "INT33F0:00_CsiPort", "0" },
247 { "INT33F0:00_CsiLanes", "1" },
248 { "INT33F0:00_CamClk", "1" },
249 {},
250 };
251
252 static struct gmin_cfg_var mrd7_vars[] = {
253 {"INT33F8:00_CamType", "1"},
254 {"INT33F8:00_CsiPort", "1"},
255 {"INT33F8:00_CsiLanes", "2"},
256 {"INT33F8:00_CsiFmt", "13"},
257 {"INT33F8:00_CsiBayer", "0"},
258 {"INT33F8:00_CamClk", "0"},
259
260 {"INT33F9:00_CamType", "1"},
261 {"INT33F9:00_CsiPort", "0"},
262 {"INT33F9:00_CsiLanes", "1"},
263 {"INT33F9:00_CsiFmt", "13"},
264 {"INT33F9:00_CsiBayer", "0"},
265 {"INT33F9:00_CamClk", "1"},
266 {},
267 };
268
269 static struct gmin_cfg_var ecs7_vars[] = {
270 {"INT33BE:00_CsiPort", "1"},
271 {"INT33BE:00_CsiLanes", "2"},
272 {"INT33BE:00_CsiFmt", "13"},
273 {"INT33BE:00_CsiBayer", "2"},
274 {"INT33BE:00_CamClk", "0"},
275
276 {"INT33F0:00_CsiPort", "0"},
277 {"INT33F0:00_CsiLanes", "1"},
278 {"INT33F0:00_CsiFmt", "13"},
279 {"INT33F0:00_CsiBayer", "0"},
280 {"INT33F0:00_CamClk", "1"},
281 {"gmin_V2P8GPIO", "402"},
282 {},
283 };
284
285 static struct gmin_cfg_var i8880_vars[] = {
286 {"XXOV2680:00_CsiPort", "1"},
287 {"XXOV2680:00_CsiLanes", "1"},
288 {"XXOV2680:00_CamClk", "0"},
289
290 {"XXGC0310:00_CsiPort", "0"},
291 {"XXGC0310:00_CsiLanes", "1"},
292 {"XXGC0310:00_CamClk", "1"},
293 {},
294 };
295
296 /*
297 * Surface 3 does not describe CsiPort/CsiLanes in both DSDT and EFI.
298 */
299 static struct gmin_cfg_var surface3_vars[] = {
300 {"APTA0330:00_CsiPort", "0"},
301 {"APTA0330:00_CsiLanes", "2"},
302
303 {"OVTI8835:00_CsiPort", "1"},
304 {"OVTI8835:00_CsiLanes", "4"},
305 {},
306 };
307
308 static struct gmin_cfg_var lenovo_ideapad_miix_310_vars[] = {
309 /* _DSM contains the wrong CsiPort! */
310 { "OVTI2680:01_CsiPort", "0" },
311 {}
312 };
313
314 static const struct dmi_system_id gmin_vars[] = {
315 /*
316 * These DMI IDs were present when the atomisp driver was merged into
317 * drivers/staging and it is unclear if they are really necessary.
318 */
319 {
320 .ident = "BYT-T FFD8",
321 .matches = {
322 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
323 },
324 .driver_data = ffrd8_vars,
325 },
326 {
327 .ident = "T100TA",
328 .matches = {
329 DMI_MATCH(DMI_BOARD_NAME, "T100TA"),
330 },
331 .driver_data = t100_vars,
332 },
333 {
334 .ident = "MRD7",
335 .matches = {
336 DMI_MATCH(DMI_BOARD_NAME, "TABLET"),
337 DMI_MATCH(DMI_BOARD_VERSION, "MRD 7"),
338 },
339 .driver_data = mrd7_vars,
340 },
341 {
342 .ident = "ST70408",
343 .matches = {
344 DMI_MATCH(DMI_BOARD_NAME, "ST70408"),
345 },
346 .driver_data = ecs7_vars,
347 },
348 {
349 .ident = "VTA0803",
350 .matches = {
351 DMI_MATCH(DMI_BOARD_NAME, "VTA0803"),
352 },
353 .driver_data = i8880_vars,
354 },
355 /* Later added DMI ids, these are confirmed to really be necessary! */
356 {
357 .ident = "Surface 3",
358 .matches = {
359 DMI_MATCH(DMI_BOARD_NAME, "Surface 3"),
360 },
361 .driver_data = surface3_vars,
362 },
363 {
364 .ident = "Lenovo Ideapad Miix 310",
365 .matches = {
366 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
367 DMI_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10"),
368 },
369 .driver_data = lenovo_ideapad_miix_310_vars,
370 },
371 {}
372 };
373
374 #define GMIN_CFG_VAR_EFI_GUID EFI_GUID(0xecb54cd9, 0xe5ae, 0x4fdc, \
375 0xa9, 0x71, 0xe8, 0x77, \
376 0x75, 0x60, 0x68, 0xf7)
377
378 static const guid_t atomisp_dsm_guid = GUID_INIT(0xdc2f6c4f, 0x045b, 0x4f1d,
379 0x97, 0xb9, 0x88, 0x2a,
380 0x68, 0x60, 0xa4, 0xbe);
381
382 #define CFG_VAR_NAME_MAX 64
383
384 #define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */
385 static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME];
386
gmin_i2c_dev_exists(struct device * dev,char * name,struct i2c_client ** client)387 static struct i2c_client *gmin_i2c_dev_exists(struct device *dev, char *name,
388 struct i2c_client **client)
389 {
390 struct acpi_device *adev;
391 struct device *d;
392
393 adev = acpi_dev_get_first_match_dev(name, NULL, -1);
394 if (!adev)
395 return NULL;
396
397 d = bus_find_device_by_acpi_dev(&i2c_bus_type, adev);
398 acpi_dev_put(adev);
399 if (!d)
400 return NULL;
401
402 *client = i2c_verify_client(d);
403 put_device(d);
404
405 dev_dbg(dev, "found '%s' at address 0x%02x, adapter %d\n",
406 (*client)->name, (*client)->addr, (*client)->adapter->nr);
407 return *client;
408 }
409
gmin_i2c_write(struct device * dev,u16 i2c_addr,u8 reg,u32 value,u32 mask)410 static int gmin_i2c_write(struct device *dev, u16 i2c_addr, u8 reg,
411 u32 value, u32 mask)
412 {
413 int ret;
414
415 /*
416 * FIXME: Right now, the intel_pmic driver just write values
417 * directly at the regmap, instead of properly implementing
418 * i2c_transfer() mechanism. Let's use the same interface here,
419 * as otherwise we may face issues.
420 */
421
422 dev_dbg(dev,
423 "I2C write, addr: 0x%02x, reg: 0x%02x, value: 0x%02x, mask: 0x%02x\n",
424 i2c_addr, reg, value, mask);
425
426 ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_addr, reg, value, mask);
427 if (ret == -EOPNOTSUPP)
428 dev_err(dev,
429 "ACPI didn't mapped the OpRegion needed to access I2C address 0x%02x.\n"
430 "Need to compile the kernel using CONFIG_*_PMIC_OPREGION settings\n",
431 i2c_addr);
432
433 return ret;
434 }
435
atomisp_get_acpi_power(struct device * dev)436 static int atomisp_get_acpi_power(struct device *dev)
437 {
438 char name[5];
439 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
440 struct acpi_buffer b_name = { sizeof(name), name };
441 union acpi_object *package, *element;
442 acpi_handle handle = ACPI_HANDLE(dev);
443 acpi_handle rhandle;
444 acpi_status status;
445 int clock_num = -1;
446 int i;
447
448 status = acpi_evaluate_object(handle, "_PR0", NULL, &buffer);
449 if (!ACPI_SUCCESS(status))
450 return -1;
451
452 package = buffer.pointer;
453
454 if (!buffer.length || !package
455 || package->type != ACPI_TYPE_PACKAGE
456 || !package->package.count)
457 goto fail;
458
459 for (i = 0; i < package->package.count; i++) {
460 element = &package->package.elements[i];
461
462 if (element->type != ACPI_TYPE_LOCAL_REFERENCE)
463 continue;
464
465 rhandle = element->reference.handle;
466 if (!rhandle)
467 goto fail;
468
469 acpi_get_name(rhandle, ACPI_SINGLE_NAME, &b_name);
470
471 dev_dbg(dev, "Found PM resource '%s'\n", name);
472 if (strlen(name) == 4 && !strncmp(name, "CLK", 3)) {
473 if (name[3] >= '0' && name[3] <= '4')
474 clock_num = name[3] - '0';
475 #if 0
476 /*
477 * We could abort here, but let's parse all resources,
478 * as this is helpful for debugging purposes
479 */
480 if (clock_num >= 0)
481 break;
482 #endif
483 }
484 }
485
486 fail:
487 ACPI_FREE(buffer.pointer);
488
489 return clock_num;
490 }
491
gmin_get_pmic_id_and_addr(struct device * dev)492 static u8 gmin_get_pmic_id_and_addr(struct device *dev)
493 {
494 struct i2c_client *power = NULL;
495 static u8 pmic_i2c_addr;
496
497 if (pmic_id)
498 return pmic_i2c_addr;
499
500 if (gmin_i2c_dev_exists(dev, PMIC_ACPI_TI, &power))
501 pmic_id = PMIC_TI;
502 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_AXP, &power))
503 pmic_id = PMIC_AXP;
504 else if (gmin_i2c_dev_exists(dev, PMIC_ACPI_CRYSTALCOVE, &power))
505 pmic_id = PMIC_CRYSTALCOVE;
506 else
507 pmic_id = PMIC_REGULATOR;
508
509 pmic_i2c_addr = power ? power->addr : 0;
510 return pmic_i2c_addr;
511 }
512
gmin_detect_pmic(struct v4l2_subdev * subdev)513 static int gmin_detect_pmic(struct v4l2_subdev *subdev)
514 {
515 struct i2c_client *client = v4l2_get_subdevdata(subdev);
516 struct device *dev = &client->dev;
517 u8 pmic_i2c_addr;
518
519 pmic_i2c_addr = gmin_get_pmic_id_and_addr(dev);
520 dev_info(dev, "gmin: power management provided via %s (i2c addr 0x%02x)\n",
521 pmic_name[pmic_id], pmic_i2c_addr);
522 return pmic_i2c_addr;
523 }
524
gmin_subdev_add(struct gmin_subdev * gs)525 static int gmin_subdev_add(struct gmin_subdev *gs)
526 {
527 struct i2c_client *client = v4l2_get_subdevdata(gs->subdev);
528 struct device *dev = &client->dev;
529 struct acpi_device *adev = ACPI_COMPANION(dev);
530 int ret, default_val, clock_num = -1;
531
532 dev_info(dev, "%s: ACPI path is %pfw\n", __func__, dev_fwnode(dev));
533
534 /*WA:CHT requires XTAL clock as PLL is not stable.*/
535 gs->clock_src = gmin_get_var_int(dev, false, "ClkSrc",
536 VLV2_CLK_PLL_19P2MHZ);
537
538 /*
539 * Get ACPI _PR0 derived clock here already because it is used
540 * to determine the csi_port default.
541 */
542 if (acpi_device_power_manageable(adev))
543 clock_num = atomisp_get_acpi_power(dev);
544
545 /* Compare clock to CsiPort 1 pmc-clock used in the CHT/BYT reference designs */
546 if (IS_ISP2401)
547 default_val = clock_num == 4 ? 1 : 0;
548 else
549 default_val = clock_num == 0 ? 1 : 0;
550
551 gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", default_val);
552 gs->csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1);
553
554 gs->gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
555 if (IS_ERR(gs->gpio0))
556 gs->gpio0 = NULL;
557 else
558 dev_info(dev, "will handle gpio0 via ACPI\n");
559
560 gs->gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW);
561 if (IS_ERR(gs->gpio1))
562 gs->gpio1 = NULL;
563 else
564 dev_info(dev, "will handle gpio1 via ACPI\n");
565
566 /*
567 * Those are used only when there is an external regulator apart
568 * from the PMIC that would be providing power supply, like on the
569 * two cases below:
570 *
571 * The ECS E7 board drives camera 2.8v from an external regulator
572 * instead of the PMIC. There's a gmin_CamV2P8 config variable
573 * that specifies the GPIO to handle this particular case,
574 * but this needs a broader architecture for handling camera power.
575 *
576 * The CHT RVP board drives camera 1.8v from an* external regulator
577 * instead of the PMIC just like ECS E7 board.
578 */
579
580 gs->v1p8_gpio = gmin_get_var_int(dev, true, "V1P8GPIO", -1);
581 gs->v2p8_gpio = gmin_get_var_int(dev, true, "V2P8GPIO", -1);
582
583 /*
584 * FIXME:
585 *
586 * The ACPI handling code checks for the _PR? tables in order to
587 * know what is required to switch the device from power state
588 * D0 (_PR0) up to D3COLD (_PR3).
589 *
590 * The adev->flags.power_manageable is set to true if the device
591 * has a _PR0 table, which can be checked by calling
592 * acpi_device_power_manageable(adev).
593 *
594 * However, this only says that the device can be set to power off
595 * mode.
596 *
597 * At least on the DSDT tables we've seen so far, there's no _PR3,
598 * nor _PS3 (which would have a somewhat similar effect).
599 * So, using ACPI for power management won't work, except if adding
600 * an ACPI override logic somewhere.
601 *
602 * So, at least for the existing devices we know, the check below
603 * will always be false.
604 */
605 if (acpi_device_can_wakeup(adev) &&
606 acpi_device_can_poweroff(adev)) {
607 dev_info(dev,
608 "gmin: power management provided via device PM\n");
609 return 0;
610 }
611
612 /*
613 * The code below is here due to backward compatibility with devices
614 * whose ACPI BIOS may not contain everything that would be needed
615 * in order to set clocks and do power management.
616 */
617
618 /*
619 * According with :
620 * https://github.com/projectceladon/hardware-intel-kernelflinger/blob/master/doc/fastboot.md
621 *
622 * The "CamClk" EFI var is set via fastboot on some Android devices,
623 * and seems to contain the number of the clock used to feed the
624 * sensor.
625 *
626 * On systems with a proper ACPI table, this is given via the _PR0
627 * power resource table. The logic below should first check if there
628 * is a power resource already, falling back to the EFI vars detection
629 * otherwise.
630 */
631
632 /* If getting the clock from _PR0 above failed, fall-back to EFI and/or DMI match */
633 if (clock_num < 0)
634 clock_num = gmin_get_var_int(dev, false, "CamClk", 0);
635
636 if (clock_num < 0 || clock_num > MAX_CLK_COUNT) {
637 dev_err(dev, "Invalid clock number\n");
638 return -EINVAL;
639 }
640
641 snprintf(gmin_pmc_clk_name, sizeof(gmin_pmc_clk_name),
642 "%s_%d", "pmc_plt_clk", clock_num);
643
644 gs->pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
645 if (IS_ERR(gs->pmc_clk)) {
646 ret = PTR_ERR(gs->pmc_clk);
647 dev_err(dev, "Failed to get clk from %s: %d\n", gmin_pmc_clk_name, ret);
648 return ret;
649 }
650 dev_info(dev, "Will use CLK%d (%s)\n", clock_num, gmin_pmc_clk_name);
651
652 /*
653 * The firmware might enable the clock at
654 * boot (this information may or may not
655 * be reflected in the enable clock register).
656 * To change the rate we must disable the clock
657 * first to cover these cases. Due to common
658 * clock framework restrictions that do not allow
659 * to disable a clock that has not been enabled,
660 * we need to enable the clock first.
661 */
662 ret = clk_prepare_enable(gs->pmc_clk);
663 if (!ret)
664 clk_disable_unprepare(gs->pmc_clk);
665
666 switch (pmic_id) {
667 case PMIC_REGULATOR:
668 gs->v1p8_reg = regulator_get(dev, "V1P8SX");
669 gs->v2p8_reg = regulator_get(dev, "V2P8SX");
670
671 gs->v1p2_reg = regulator_get(dev, "V1P2A");
672 gs->v2p8_vcm_reg = regulator_get(dev, "VPROG4B");
673
674 /* Note: ideally we would initialize v[12]p8_on to the
675 * output of regulator_is_enabled(), but sadly that
676 * API is broken with the current drivers, returning
677 * "1" for a regulator that will then emit a
678 * "unbalanced disable" WARNing if we try to disable
679 * it.
680 */
681 break;
682
683 case PMIC_AXP:
684 gs->eldo1_1p6v = gmin_get_var_int(dev, false,
685 "eldo1_1p8v",
686 ELDO1_1P6V);
687 gs->eldo1_sel_reg = gmin_get_var_int(dev, false,
688 "eldo1_sel_reg",
689 ELDO1_SEL_REG);
690 gs->eldo1_ctrl_shift = gmin_get_var_int(dev, false,
691 "eldo1_ctrl_shift",
692 ELDO1_CTRL_SHIFT);
693 gs->eldo2_1p8v = gmin_get_var_int(dev, false,
694 "eldo2_1p8v",
695 ELDO2_1P8V);
696 gs->eldo2_sel_reg = gmin_get_var_int(dev, false,
697 "eldo2_sel_reg",
698 ELDO2_SEL_REG);
699 gs->eldo2_ctrl_shift = gmin_get_var_int(dev, false,
700 "eldo2_ctrl_shift",
701 ELDO2_CTRL_SHIFT);
702 break;
703
704 default:
705 break;
706 }
707
708 return 0;
709 }
710
find_gmin_subdev(struct v4l2_subdev * subdev)711 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
712 {
713 int i;
714
715 for (i = 0; i < MAX_SUBDEVS; i++)
716 if (gmin_subdevs[i].subdev == subdev)
717 return &gmin_subdevs[i];
718 return NULL;
719 }
720
find_free_gmin_subdev_slot(void)721 static struct gmin_subdev *find_free_gmin_subdev_slot(void)
722 {
723 unsigned int i;
724
725 for (i = 0; i < MAX_SUBDEVS; i++)
726 if (gmin_subdevs[i].subdev == NULL)
727 return &gmin_subdevs[i];
728 return NULL;
729 }
730
axp_regulator_set(struct device * dev,struct gmin_subdev * gs,int sel_reg,u8 setting,int ctrl_reg,int shift,bool on)731 static int axp_regulator_set(struct device *dev, struct gmin_subdev *gs,
732 int sel_reg, u8 setting,
733 int ctrl_reg, int shift, bool on)
734 {
735 int ret;
736 int val;
737
738 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, sel_reg, setting, 0xff);
739 if (ret)
740 return ret;
741
742 val = on ? 1 << shift : 0;
743
744 ret = gmin_i2c_write(dev, gs->pwm_i2c_addr, ctrl_reg, val, 1 << shift);
745 if (ret)
746 return ret;
747
748 return 0;
749 }
750
751 /*
752 * Some boards contain a hw-bug where turning eldo2 back on after having turned
753 * it off causes the CPLM3218 ambient-light-sensor on the image-sensor's I2C bus
754 * to crash, hanging the bus. Do not turn eldo2 off on these systems.
755 */
756 static const struct dmi_system_id axp_leave_eldo2_on_ids[] = {
757 {
758 .matches = {
759 DMI_MATCH(DMI_SYS_VENDOR, "TrekStor"),
760 DMI_MATCH(DMI_PRODUCT_NAME, "SurfTab duo W1 10.1 (VT4)"),
761 },
762 },
763 { }
764 };
765
axp_v1p8_on(struct device * dev,struct gmin_subdev * gs)766 static int axp_v1p8_on(struct device *dev, struct gmin_subdev *gs)
767 {
768 int ret;
769
770 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v,
771 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, true);
772 if (ret)
773 return ret;
774
775 /*
776 * This sleep comes out of the gc2235 driver, which is the
777 * only one I currently see that wants to set both 1.8v rails.
778 */
779 usleep_range(110, 150);
780
781 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p6v,
782 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, true);
783 return ret;
784 }
785
axp_v1p8_off(struct device * dev,struct gmin_subdev * gs)786 static int axp_v1p8_off(struct device *dev, struct gmin_subdev *gs)
787 {
788 int ret;
789
790 ret = axp_regulator_set(dev, gs, gs->eldo1_sel_reg, gs->eldo1_1p6v,
791 ELDO_CTRL_REG, gs->eldo1_ctrl_shift, false);
792 if (ret)
793 return ret;
794
795 if (dmi_check_system(axp_leave_eldo2_on_ids))
796 return 0;
797
798 ret = axp_regulator_set(dev, gs, gs->eldo2_sel_reg, gs->eldo2_1p8v,
799 ELDO_CTRL_REG, gs->eldo2_ctrl_shift, false);
800 return ret;
801 }
802
gmin_gpio0_ctrl(struct v4l2_subdev * subdev,int on)803 static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on)
804 {
805 struct gmin_subdev *gs = find_gmin_subdev(subdev);
806
807 if (gs) {
808 gpiod_set_value(gs->gpio0, on);
809 return 0;
810 }
811 return -EINVAL;
812 }
813
gmin_gpio1_ctrl(struct v4l2_subdev * subdev,int on)814 static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on)
815 {
816 struct gmin_subdev *gs = find_gmin_subdev(subdev);
817
818 if (gs) {
819 gpiod_set_value(gs->gpio1, on);
820 return 0;
821 }
822 return -EINVAL;
823 }
824
gmin_v1p2_ctrl(struct v4l2_subdev * subdev,int on)825 static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on)
826 {
827 struct gmin_subdev *gs = find_gmin_subdev(subdev);
828
829 if (!gs || gs->v1p2_on == on)
830 return 0;
831 gs->v1p2_on = on;
832
833 /* use regulator for PMIC */
834 if (gs->v1p2_reg) {
835 if (on)
836 return regulator_enable(gs->v1p2_reg);
837 else
838 return regulator_disable(gs->v1p2_reg);
839 }
840
841 /* TODO:v1p2 may need to extend to other PMICs */
842
843 return -EINVAL;
844 }
845
gmin_v1p8_ctrl(struct v4l2_subdev * subdev,int on)846 static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on)
847 {
848 struct gmin_subdev *gs = find_gmin_subdev(subdev);
849 int ret;
850 int value;
851 int reg;
852
853 if (!gs || gs->v1p8_on == on)
854 return 0;
855
856 if (gs->v1p8_gpio >= 0) {
857 pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n",
858 gs->v1p8_gpio);
859 ret = gpio_request(gs->v1p8_gpio, "camera_v1p8_en");
860 if (!ret)
861 ret = gpio_direction_output(gs->v1p8_gpio, 0);
862 if (ret)
863 pr_err("V1P8 GPIO initialization failed\n");
864 }
865
866 gs->v1p8_on = on;
867
868 ret = 0;
869 mutex_lock(&gmin_regulator_mutex);
870 if (on) {
871 gmin_v1p8_enable_count++;
872 if (gmin_v1p8_enable_count > 1)
873 goto out; /* Already on */
874 } else {
875 gmin_v1p8_enable_count--;
876 if (gmin_v1p8_enable_count > 0)
877 goto out; /* Still needed */
878 }
879
880 if (gs->v1p8_gpio >= 0)
881 gpio_set_value(gs->v1p8_gpio, on);
882
883 if (gs->v1p8_reg) {
884 regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000);
885 if (on)
886 ret = regulator_enable(gs->v1p8_reg);
887 else
888 ret = regulator_disable(gs->v1p8_reg);
889
890 goto out;
891 }
892
893 switch (pmic_id) {
894 case PMIC_AXP:
895 if (on)
896 ret = axp_v1p8_on(subdev->dev, gs);
897 else
898 ret = axp_v1p8_off(subdev->dev, gs);
899 break;
900 case PMIC_TI:
901 value = on ? LDO_1P8V_ON : LDO_1P8V_OFF;
902
903 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr,
904 LDO10_REG, value, 0xff);
905 break;
906 case PMIC_CRYSTALCOVE:
907 if (IS_ISP2401)
908 reg = CRYSTAL_CHT_1P8V_REG;
909 else
910 reg = CRYSTAL_BYT_1P8V_REG;
911
912 value = on ? CRYSTAL_ON : CRYSTAL_OFF;
913
914 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr,
915 reg, value, 0xff);
916 break;
917 default:
918 dev_err(subdev->dev, "Couldn't set power mode for v1p8\n");
919 ret = -EINVAL;
920 }
921
922 out:
923 mutex_unlock(&gmin_regulator_mutex);
924 return ret;
925 }
926
gmin_v2p8_ctrl(struct v4l2_subdev * subdev,int on)927 static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on)
928 {
929 struct gmin_subdev *gs = find_gmin_subdev(subdev);
930 int ret;
931 int value;
932 int reg;
933
934 if (WARN_ON(!gs))
935 return -ENODEV;
936
937 if (gs->v2p8_gpio >= 0) {
938 pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n",
939 gs->v2p8_gpio);
940 ret = gpio_request(gs->v2p8_gpio, "camera_v2p8");
941 if (!ret)
942 ret = gpio_direction_output(gs->v2p8_gpio, 0);
943 if (ret)
944 pr_err("V2P8 GPIO initialization failed\n");
945 }
946
947 if (gs->v2p8_on == on)
948 return 0;
949 gs->v2p8_on = on;
950
951 ret = 0;
952 mutex_lock(&gmin_regulator_mutex);
953 if (on) {
954 gmin_v2p8_enable_count++;
955 if (gmin_v2p8_enable_count > 1)
956 goto out; /* Already on */
957 } else {
958 gmin_v2p8_enable_count--;
959 if (gmin_v2p8_enable_count > 0)
960 goto out; /* Still needed */
961 }
962
963 if (gs->v2p8_gpio >= 0)
964 gpio_set_value(gs->v2p8_gpio, on);
965
966 if (gs->v2p8_reg) {
967 regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000);
968 if (on)
969 ret = regulator_enable(gs->v2p8_reg);
970 else
971 ret = regulator_disable(gs->v2p8_reg);
972
973 goto out;
974 }
975
976 switch (pmic_id) {
977 case PMIC_AXP:
978 ret = axp_regulator_set(subdev->dev, gs, ALDO1_SEL_REG,
979 ALDO1_2P8V, ALDO1_CTRL3_REG,
980 ALDO1_CTRL3_SHIFT, on);
981 break;
982 case PMIC_TI:
983 value = on ? LDO_2P8V_ON : LDO_2P8V_OFF;
984
985 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr,
986 LDO9_REG, value, 0xff);
987 break;
988 case PMIC_CRYSTALCOVE:
989 if (IS_ISP2401)
990 reg = CRYSTAL_CHT_2P8V_REG;
991 else
992 reg = CRYSTAL_BYT_2P8V_REG;
993
994 value = on ? CRYSTAL_ON : CRYSTAL_OFF;
995
996 ret = gmin_i2c_write(subdev->dev, gs->pwm_i2c_addr,
997 reg, value, 0xff);
998 break;
999 default:
1000 dev_err(subdev->dev, "Couldn't set power mode for v2p8\n");
1001 ret = -EINVAL;
1002 }
1003
1004 out:
1005 mutex_unlock(&gmin_regulator_mutex);
1006 return ret;
1007 }
1008
gmin_acpi_pm_ctrl(struct v4l2_subdev * subdev,int on)1009 static int gmin_acpi_pm_ctrl(struct v4l2_subdev *subdev, int on)
1010 {
1011 int ret = 0;
1012 struct gmin_subdev *gs = find_gmin_subdev(subdev);
1013 struct i2c_client *client = v4l2_get_subdevdata(subdev);
1014 struct acpi_device *adev = ACPI_COMPANION(&client->dev);
1015
1016 /* Use the ACPI power management to control it */
1017 on = !!on;
1018 if (gs->clock_on == on)
1019 return 0;
1020
1021 dev_dbg(subdev->dev, "Setting power state to %s\n",
1022 on ? "on" : "off");
1023
1024 if (on)
1025 ret = acpi_device_set_power(adev,
1026 ACPI_STATE_D0);
1027 else
1028 ret = acpi_device_set_power(adev,
1029 ACPI_STATE_D3_COLD);
1030
1031 if (!ret)
1032 gs->clock_on = on;
1033 else
1034 dev_err(subdev->dev, "Couldn't set power state to %s\n",
1035 on ? "on" : "off");
1036
1037 return ret;
1038 }
1039
gmin_flisclk_ctrl(struct v4l2_subdev * subdev,int on)1040 static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on)
1041 {
1042 int ret = 0;
1043 struct gmin_subdev *gs = find_gmin_subdev(subdev);
1044 struct i2c_client *client = v4l2_get_subdevdata(subdev);
1045
1046 if (gs->clock_on == !!on)
1047 return 0;
1048
1049 if (on) {
1050 ret = clk_set_rate(gs->pmc_clk,
1051 gs->clock_src ? CLK_RATE_19_2MHZ : CLK_RATE_25_0MHZ);
1052
1053 if (ret)
1054 dev_err(&client->dev, "unable to set PMC rate %d\n",
1055 gs->clock_src);
1056
1057 ret = clk_prepare_enable(gs->pmc_clk);
1058 if (ret == 0)
1059 gs->clock_on = true;
1060 } else {
1061 clk_disable_unprepare(gs->pmc_clk);
1062 gs->clock_on = false;
1063 }
1064
1065 return ret;
1066 }
1067
camera_sensor_csi_alloc(struct v4l2_subdev * sd,u32 port,u32 lanes,u32 format,u32 bayer_order)1068 static int camera_sensor_csi_alloc(struct v4l2_subdev *sd, u32 port, u32 lanes,
1069 u32 format, u32 bayer_order)
1070 {
1071 struct i2c_client *client = v4l2_get_subdevdata(sd);
1072 struct camera_mipi_info *csi;
1073
1074 csi = kzalloc(sizeof(*csi), GFP_KERNEL);
1075 if (!csi)
1076 return -ENOMEM;
1077
1078 csi->port = port;
1079 csi->num_lanes = lanes;
1080 csi->input_format = format;
1081 csi->raw_bayer_order = bayer_order;
1082 v4l2_set_subdev_hostdata(sd, csi);
1083 csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED;
1084 csi->metadata_effective_width = NULL;
1085 dev_info(&client->dev,
1086 "camera pdata: port: %d lanes: %d order: %8.8x\n",
1087 port, lanes, bayer_order);
1088
1089 return 0;
1090 }
1091
camera_sensor_csi_free(struct v4l2_subdev * sd)1092 static void camera_sensor_csi_free(struct v4l2_subdev *sd)
1093 {
1094 struct camera_mipi_info *csi;
1095
1096 csi = v4l2_get_subdev_hostdata(sd);
1097 kfree(csi);
1098 }
1099
gmin_csi_cfg(struct v4l2_subdev * sd,int flag)1100 static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag)
1101 {
1102 struct i2c_client *client = v4l2_get_subdevdata(sd);
1103 struct gmin_subdev *gs = find_gmin_subdev(sd);
1104
1105 if (!client || !gs)
1106 return -ENODEV;
1107
1108 if (flag)
1109 return camera_sensor_csi_alloc(sd, gs->csi_port, gs->csi_lanes,
1110 gs->csi_fmt, gs->csi_bayer);
1111 camera_sensor_csi_free(sd);
1112 return 0;
1113 }
1114
atomisp_register_sensor_no_gmin(struct v4l2_subdev * subdev,u32 lanes,enum atomisp_input_format format,enum atomisp_bayer_order bayer_order)1115 int atomisp_register_sensor_no_gmin(struct v4l2_subdev *subdev, u32 lanes,
1116 enum atomisp_input_format format,
1117 enum atomisp_bayer_order bayer_order)
1118 {
1119 struct i2c_client *client = v4l2_get_subdevdata(subdev);
1120 struct acpi_device *adev = ACPI_COMPANION(&client->dev);
1121 int i, ret, clock_num, port = 0;
1122
1123 if (adev) {
1124 /* Get ACPI _PR0 derived clock to determine the csi_port default */
1125 if (acpi_device_power_manageable(adev)) {
1126 clock_num = atomisp_get_acpi_power(&client->dev);
1127
1128 /* Compare clock to CsiPort 1 pmc-clock used in the CHT/BYT reference designs */
1129 if (IS_ISP2401)
1130 port = clock_num == 4 ? 1 : 0;
1131 else
1132 port = clock_num == 0 ? 1 : 0;
1133 }
1134
1135 port = gmin_get_var_int(&client->dev, false, "CsiPort", port);
1136 lanes = gmin_get_var_int(&client->dev, false, "CsiLanes", lanes);
1137 }
1138
1139 for (i = 0; i < MAX_SUBDEVS; i++)
1140 if (!pdata.subdevs[i].type)
1141 break;
1142
1143 if (i >= MAX_SUBDEVS) {
1144 dev_err(&client->dev, "Error too many subdevs already registered\n");
1145 return -ENOMEM;
1146 }
1147
1148 ret = camera_sensor_csi_alloc(subdev, port, lanes, format, bayer_order);
1149 if (ret)
1150 return ret;
1151
1152 pdata.subdevs[i].type = RAW_CAMERA;
1153 pdata.subdevs[i].port = port;
1154 pdata.subdevs[i].lanes = lanes;
1155 pdata.subdevs[i].subdev = subdev;
1156 return 0;
1157 }
1158 EXPORT_SYMBOL_GPL(atomisp_register_sensor_no_gmin);
1159
atomisp_unregister_subdev(struct v4l2_subdev * subdev)1160 void atomisp_unregister_subdev(struct v4l2_subdev *subdev)
1161 {
1162 int i;
1163
1164 for (i = 0; i < MAX_SUBDEVS; i++) {
1165 if (pdata.subdevs[i].subdev != subdev)
1166 continue;
1167
1168 camera_sensor_csi_free(subdev);
1169 pdata.subdevs[i].subdev = NULL;
1170 pdata.subdevs[i].type = 0;
1171 pdata.subdevs[i].port = 0;
1172 break;
1173 }
1174 }
1175 EXPORT_SYMBOL_GPL(atomisp_unregister_subdev);
1176
gmin_get_vcm_ctrl(struct v4l2_subdev * subdev,char * camera_module)1177 static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev,
1178 char *camera_module)
1179 {
1180 struct i2c_client *client = v4l2_get_subdevdata(subdev);
1181 struct gmin_subdev *gs = find_gmin_subdev(subdev);
1182 struct camera_vcm_control *vcm;
1183
1184 if (!client || !gs)
1185 return NULL;
1186
1187 if (!camera_module)
1188 return NULL;
1189
1190 mutex_lock(&vcm_lock);
1191 list_for_each_entry(vcm, &vcm_devices, list) {
1192 if (!strcmp(camera_module, vcm->camera_module)) {
1193 mutex_unlock(&vcm_lock);
1194 return vcm;
1195 }
1196 }
1197
1198 mutex_unlock(&vcm_lock);
1199 return NULL;
1200 }
1201
1202 static struct camera_sensor_platform_data pmic_gmin_plat = {
1203 .gpio0_ctrl = gmin_gpio0_ctrl,
1204 .gpio1_ctrl = gmin_gpio1_ctrl,
1205 .v1p8_ctrl = gmin_v1p8_ctrl,
1206 .v2p8_ctrl = gmin_v2p8_ctrl,
1207 .v1p2_ctrl = gmin_v1p2_ctrl,
1208 .flisclk_ctrl = gmin_flisclk_ctrl,
1209 .csi_cfg = gmin_csi_cfg,
1210 .get_vcm_ctrl = gmin_get_vcm_ctrl,
1211 };
1212
1213 static struct camera_sensor_platform_data acpi_gmin_plat = {
1214 .gpio0_ctrl = gmin_gpio0_ctrl,
1215 .gpio1_ctrl = gmin_gpio1_ctrl,
1216 .v1p8_ctrl = gmin_acpi_pm_ctrl,
1217 .v2p8_ctrl = gmin_acpi_pm_ctrl,
1218 .v1p2_ctrl = gmin_acpi_pm_ctrl,
1219 .flisclk_ctrl = gmin_acpi_pm_ctrl,
1220 .csi_cfg = gmin_csi_cfg,
1221 .get_vcm_ctrl = gmin_get_vcm_ctrl,
1222 };
1223
1224 struct camera_sensor_platform_data *
gmin_camera_platform_data(struct v4l2_subdev * subdev,enum atomisp_input_format csi_format,enum atomisp_bayer_order csi_bayer)1225 gmin_camera_platform_data(struct v4l2_subdev *subdev,
1226 enum atomisp_input_format csi_format,
1227 enum atomisp_bayer_order csi_bayer)
1228 {
1229 u8 pmic_i2c_addr = gmin_detect_pmic(subdev);
1230 struct gmin_subdev *gs;
1231
1232 gs = find_free_gmin_subdev_slot();
1233 gs->subdev = subdev;
1234 gs->csi_fmt = csi_format;
1235 gs->csi_bayer = csi_bayer;
1236 gs->pwm_i2c_addr = pmic_i2c_addr;
1237
1238 gmin_subdev_add(gs);
1239 if (gs->pmc_clk)
1240 return &pmic_gmin_plat;
1241 else
1242 return &acpi_gmin_plat;
1243 }
1244 EXPORT_SYMBOL_GPL(gmin_camera_platform_data);
1245
atomisp_gmin_register_vcm_control(struct camera_vcm_control * vcmCtrl)1246 int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl)
1247 {
1248 if (!vcmCtrl)
1249 return -EINVAL;
1250
1251 mutex_lock(&vcm_lock);
1252 list_add_tail(&vcmCtrl->list, &vcm_devices);
1253 mutex_unlock(&vcm_lock);
1254
1255 return 0;
1256 }
1257 EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control);
1258
gmin_get_hardcoded_var(struct device * dev,struct gmin_cfg_var * varlist,const char * var8,char * out,size_t * out_len)1259 static int gmin_get_hardcoded_var(struct device *dev,
1260 struct gmin_cfg_var *varlist,
1261 const char *var8, char *out, size_t *out_len)
1262 {
1263 struct gmin_cfg_var *gv;
1264
1265 for (gv = varlist; gv->name; gv++) {
1266 size_t vl;
1267
1268 if (strcmp(var8, gv->name))
1269 continue;
1270
1271 dev_info(dev, "Found DMI entry for '%s'\n", var8);
1272
1273 vl = strlen(gv->val);
1274 if (vl > *out_len - 1)
1275 return -ENOSPC;
1276
1277 strscpy(out, gv->val, *out_len);
1278 *out_len = vl;
1279 return 0;
1280 }
1281
1282 return -EINVAL;
1283 }
1284
1285
gmin_get_config_dsm_var(struct device * dev,const char * var,char * out,size_t * out_len)1286 static int gmin_get_config_dsm_var(struct device *dev,
1287 const char *var,
1288 char *out, size_t *out_len)
1289 {
1290 acpi_handle handle = ACPI_HANDLE(dev);
1291 union acpi_object *obj, *cur = NULL;
1292 int i;
1293
1294 /*
1295 * The data reported by "CamClk" seems to be either 0 or 1 at the
1296 * _DSM table.
1297 *
1298 * At the ACPI tables we looked so far, this is not related to the
1299 * actual clock source for the sensor, which is given by the
1300 * _PR0 ACPI table. So, ignore it, as otherwise this will be
1301 * set to a wrong value.
1302 */
1303 if (!strcmp(var, "CamClk"))
1304 return -EINVAL;
1305
1306 /* Return on unexpected object type */
1307 obj = acpi_evaluate_dsm_typed(handle, &atomisp_dsm_guid, 0, 0, NULL,
1308 ACPI_TYPE_PACKAGE);
1309 if (!obj) {
1310 dev_info_once(dev, "Didn't find ACPI _DSM table.\n");
1311 return -EINVAL;
1312 }
1313
1314 #if 0 /* Just for debugging purposes */
1315 for (i = 0; i < obj->package.count; i++) {
1316 union acpi_object *cur = &obj->package.elements[i];
1317
1318 if (cur->type == ACPI_TYPE_INTEGER)
1319 dev_info(dev, "object #%d, type %d, value: %lld\n",
1320 i, cur->type, cur->integer.value);
1321 else if (cur->type == ACPI_TYPE_STRING)
1322 dev_info(dev, "object #%d, type %d, string: %s\n",
1323 i, cur->type, cur->string.pointer);
1324 else
1325 dev_info(dev, "object #%d, type %d\n",
1326 i, cur->type);
1327 }
1328 #endif
1329
1330 /* Seek for the desired var */
1331 for (i = 0; i < obj->package.count - 1; i += 2) {
1332 if (obj->package.elements[i].type == ACPI_TYPE_STRING &&
1333 !strcmp(obj->package.elements[i].string.pointer, var)) {
1334 /* Next element should be the required value */
1335 cur = &obj->package.elements[i + 1];
1336 break;
1337 }
1338 }
1339
1340 if (!cur) {
1341 dev_info(dev, "didn't found _DSM entry for '%s'\n", var);
1342 ACPI_FREE(obj);
1343 return -EINVAL;
1344 }
1345
1346 /*
1347 * While it could be possible to have an ACPI_TYPE_INTEGER,
1348 * and read the value from cur->integer.value, the table
1349 * seen so far uses the string type. So, produce a warning
1350 * if it founds something different than string, letting it
1351 * to fall back to the old code.
1352 */
1353 if (cur && cur->type != ACPI_TYPE_STRING) {
1354 dev_info(dev, "found non-string _DSM entry for '%s'\n", var);
1355 ACPI_FREE(obj);
1356 return -EINVAL;
1357 }
1358
1359 dev_info(dev, "found _DSM entry for '%s': %s\n", var,
1360 cur->string.pointer);
1361 strscpy(out, cur->string.pointer, *out_len);
1362 *out_len = strlen(out);
1363
1364 ACPI_FREE(obj);
1365 return 0;
1366 }
1367
1368 /* Retrieves a device-specific configuration variable. The dev
1369 * argument should be a device with an ACPI companion, as all
1370 * configuration is based on firmware ID.
1371 */
gmin_get_config_var(struct device * maindev,bool is_gmin,const char * var,char * out,size_t * out_len)1372 static int gmin_get_config_var(struct device *maindev,
1373 bool is_gmin,
1374 const char *var,
1375 char *out, size_t *out_len)
1376 {
1377 struct acpi_device *adev = ACPI_COMPANION(maindev);
1378 efi_char16_t var16[CFG_VAR_NAME_MAX];
1379 const struct dmi_system_id *id;
1380 char var8[CFG_VAR_NAME_MAX];
1381 efi_status_t status;
1382 int i, ret;
1383
1384 if (!is_gmin && adev)
1385 ret = snprintf(var8, sizeof(var8), "%s_%s", acpi_dev_name(adev), var);
1386 else
1387 ret = snprintf(var8, sizeof(var8), "gmin_%s", var);
1388
1389 if (ret < 0 || ret >= sizeof(var8) - 1)
1390 return -EINVAL;
1391
1392 /* DMI based quirks override both the _DSM table and EFI variables */
1393 id = dmi_first_match(gmin_vars);
1394 if (id) {
1395 ret = gmin_get_hardcoded_var(maindev, id->driver_data, var8,
1396 out, out_len);
1397 if (!ret)
1398 return 0;
1399 }
1400
1401 /* For sensors, try first to use the _DSM table */
1402 if (!is_gmin) {
1403 ret = gmin_get_config_dsm_var(maindev, var, out, out_len);
1404 if (!ret)
1405 return 0;
1406 }
1407
1408 /* Our variable names are ASCII by construction, but EFI names
1409 * are wide chars. Convert and zero-pad.
1410 */
1411 memset(var16, 0, sizeof(var16));
1412 for (i = 0; i < sizeof(var8) && var8[i]; i++)
1413 var16[i] = var8[i];
1414
1415 status = EFI_UNSUPPORTED;
1416 if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
1417 status = efi.get_variable(var16, &GMIN_CFG_VAR_EFI_GUID, NULL,
1418 (unsigned long *)out_len, out);
1419 if (status == EFI_SUCCESS) {
1420 dev_info(maindev, "found EFI entry for '%s'\n", var8);
1421 } else if (is_gmin) {
1422 dev_info(maindev, "Failed to find EFI gmin variable %s\n", var8);
1423 } else {
1424 dev_info(maindev, "Failed to find EFI variable %s\n", var8);
1425 }
1426
1427 return ret;
1428 }
1429
gmin_get_var_int(struct device * dev,bool is_gmin,const char * var,int def)1430 int gmin_get_var_int(struct device *dev, bool is_gmin, const char *var, int def)
1431 {
1432 char val[CFG_VAR_NAME_MAX + 1];
1433 size_t len = CFG_VAR_NAME_MAX;
1434 long result;
1435 int ret;
1436
1437 ret = gmin_get_config_var(dev, is_gmin, var, val, &len);
1438 if (!ret) {
1439 val[len] = 0;
1440 ret = kstrtol(val, 0, &result);
1441 } else {
1442 dev_info(dev, "%s: using default (%d)\n", var, def);
1443 }
1444
1445 return ret ? def : result;
1446 }
1447 EXPORT_SYMBOL_GPL(gmin_get_var_int);
1448
1449 /* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't
1450 * work. Disable so the kernel framework doesn't hang the device
1451 * trying. The driver itself does direct calls to the PUNIT to manage
1452 * ISP power.
1453 */
isp_pm_cap_fixup(struct pci_dev * pdev)1454 static void isp_pm_cap_fixup(struct pci_dev *pdev)
1455 {
1456 dev_info(&pdev->dev, "Disabling PCI power management on camera ISP\n");
1457 pdev->pm_cap = 0;
1458 }
1459 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup);
1460
1461 MODULE_DESCRIPTION("Ancillary routines for binding ACPI devices");
1462 MODULE_LICENSE("GPL");
1463