1 #include <linux/module.h>
6 #include <linux/acpi.h>
8 #include <linux/delay.h>
9 #include <media/v4l2-subdev.h>
10 #include <linux/mfd/intel_soc_pmic.h>
11 #include <linux/regulator/consumer.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/gpio.h>
14 #include <linux/platform_device.h>
15 #include "../../include/linux/atomisp_platform.h"
16 #include "../../include/linux/atomisp_gmin_platform.h"
20 #define VLV2_CLK_PLL_19P2MHZ 1 /* XTAL on CHT */
21 #define ELDO1_SEL_REG 0x19
22 #define ELDO1_1P8V 0x16
23 #define ELDO1_CTRL_SHIFT 0x00
24 #define ELDO2_SEL_REG 0x1a
25 #define ELDO2_1P8V 0x16
26 #define ELDO2_CTRL_SHIFT 0x01
29 struct v4l2_subdev *subdev;
34 struct gpio_desc *gpio0;
35 struct gpio_desc *gpio1;
36 struct regulator *v1p8_reg;
37 struct regulator *v2p8_reg;
38 struct regulator *v1p2_reg;
39 struct regulator *v2p8_vcm_reg;
40 enum atomisp_camera_port csi_port;
41 unsigned int csi_lanes;
42 enum atomisp_input_format csi_fmt;
43 enum atomisp_bayer_order csi_bayer;
50 static struct gmin_subdev gmin_subdevs[MAX_SUBDEVS];
52 static enum { PMIC_UNSET = 0, PMIC_REGULATOR, PMIC_AXP, PMIC_TI,
53 PMIC_CRYSTALCOVE } pmic_id;
55 /* The atomisp uses type==0 for the end-of-list marker, so leave space. */
56 static struct intel_v4l2_subdev_table pdata_subdevs[MAX_SUBDEVS + 1];
58 static const struct atomisp_platform_data pdata = {
59 .subdevs = pdata_subdevs,
63 * Something of a hack. The ECS E7 board drives camera 2.8v from an
64 * external regulator instead of the PMIC. There's a gmin_CamV2P8
65 * config variable that specifies the GPIO to handle this particular
66 * case, but this needs a broader architecture for handling camera
69 enum { V2P8_GPIO_UNSET = -2, V2P8_GPIO_NONE = -1 };
70 static int v2p8_gpio = V2P8_GPIO_UNSET;
73 * Something of a hack. The CHT RVP board drives camera 1.8v from an
74 * external regulator instead of the PMIC just like ECS E7 board, see the
77 enum { V1P8_GPIO_UNSET = -2, V1P8_GPIO_NONE = -1 };
78 static int v1p8_gpio = V1P8_GPIO_UNSET;
80 static LIST_HEAD(vcm_devices);
81 static DEFINE_MUTEX(vcm_lock);
83 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev);
86 * Legacy/stub behavior copied from upstream platform_camera.c. The
87 * atomisp driver relies on these values being non-NULL in a few
88 * places, even though they are hard-coded in all current
91 const struct atomisp_camera_caps *atomisp_get_default_camera_caps(void)
93 static const struct atomisp_camera_caps caps = {
101 EXPORT_SYMBOL_GPL(atomisp_get_default_camera_caps);
103 const struct atomisp_platform_data *atomisp_get_platform_data(void)
107 EXPORT_SYMBOL_GPL(atomisp_get_platform_data);
109 int atomisp_register_i2c_module(struct v4l2_subdev *subdev,
110 struct camera_sensor_platform_data *plat_data,
111 enum intel_v4l2_subdev_type type)
114 struct i2c_board_info *bi;
115 struct gmin_subdev *gs;
116 struct i2c_client *client = v4l2_get_subdevdata(subdev);
117 struct acpi_device *adev = ACPI_COMPANION(&client->dev);
119 dev_info(&client->dev, "register atomisp i2c module type %d\n", type);
121 /* The windows driver model (and thus most BIOSes by default)
122 * uses ACPI runtime power management for camera devices, but
123 * we don't. Disable it, or else the rails will be needlessly
124 * tickled during suspend/resume. This has caused power and
125 * performance issues on multiple devices.
127 adev->power.flags.power_resources = 0;
129 for (i = 0; i < MAX_SUBDEVS; i++)
130 if (!pdata.subdevs[i].type)
133 if (pdata.subdevs[i].type)
136 /* Note subtlety of initialization order: at the point where
137 * this registration API gets called, the platform data
138 * callbacks have probably already been invoked, so the
139 * gmin_subdev struct is already initialized for us.
141 gs = find_gmin_subdev(subdev);
143 pdata.subdevs[i].type = type;
144 pdata.subdevs[i].port = gs->csi_port;
145 pdata.subdevs[i].subdev = subdev;
146 pdata.subdevs[i].v4l2_subdev.i2c_adapter_id = client->adapter->nr;
148 /* Convert i2c_client to i2c_board_info */
149 bi = &pdata.subdevs[i].v4l2_subdev.board_info;
150 memcpy(bi->type, client->name, I2C_NAME_SIZE);
151 bi->flags = client->flags;
152 bi->addr = client->addr;
153 bi->irq = client->irq;
154 bi->platform_data = plat_data;
158 EXPORT_SYMBOL_GPL(atomisp_register_i2c_module);
160 struct v4l2_subdev *atomisp_gmin_find_subdev(struct i2c_adapter *adapter,
161 struct i2c_board_info *board_info)
165 for (i = 0; i < MAX_SUBDEVS && pdata.subdevs[i].type; i++) {
166 struct intel_v4l2_subdev_table *sd = &pdata.subdevs[i];
168 if (sd->v4l2_subdev.i2c_adapter_id == adapter->nr &&
169 sd->v4l2_subdev.board_info.addr == board_info->addr)
174 EXPORT_SYMBOL_GPL(atomisp_gmin_find_subdev);
176 int atomisp_gmin_remove_subdev(struct v4l2_subdev *sd)
183 for (i = 0; i < MAX_SUBDEVS; i++) {
184 if (pdata.subdevs[i].subdev == sd) {
185 for (j = i + 1; j <= MAX_SUBDEVS; j++)
186 pdata.subdevs[j - 1] = pdata.subdevs[j];
188 if (gmin_subdevs[i].subdev == sd) {
189 if (gmin_subdevs[i].gpio0)
190 gpiod_put(gmin_subdevs[i].gpio0);
191 gmin_subdevs[i].gpio0 = NULL;
192 if (gmin_subdevs[i].gpio1)
193 gpiod_put(gmin_subdevs[i].gpio1);
194 gmin_subdevs[i].gpio1 = NULL;
195 if (pmic_id == PMIC_REGULATOR) {
196 regulator_put(gmin_subdevs[i].v1p8_reg);
197 regulator_put(gmin_subdevs[i].v2p8_reg);
198 regulator_put(gmin_subdevs[i].v1p2_reg);
199 regulator_put(gmin_subdevs[i].v2p8_vcm_reg);
201 gmin_subdevs[i].subdev = NULL;
206 EXPORT_SYMBOL_GPL(atomisp_gmin_remove_subdev);
208 struct gmin_cfg_var {
209 const char *name, *val;
212 static struct gmin_cfg_var ffrd8_vars[] = {
213 { "INTCF1B:00_ImxId", "0x134" },
214 { "INTCF1B:00_CsiPort", "1" },
215 { "INTCF1B:00_CsiLanes", "4" },
216 { "INTCF1B:00_CamClk", "0" },
220 /* Cribbed from MCG defaults in the mt9m114 driver, not actually verified
223 static struct gmin_cfg_var t100_vars[] = {
224 { "INT33F0:00_CsiPort", "0" },
225 { "INT33F0:00_CsiLanes", "1" },
226 { "INT33F0:00_CamClk", "1" },
230 static struct gmin_cfg_var mrd7_vars[] = {
231 {"INT33F8:00_CamType", "1"},
232 {"INT33F8:00_CsiPort", "1"},
233 {"INT33F8:00_CsiLanes", "2"},
234 {"INT33F8:00_CsiFmt", "13"},
235 {"INT33F8:00_CsiBayer", "0"},
236 {"INT33F8:00_CamClk", "0"},
237 {"INT33F9:00_CamType", "1"},
238 {"INT33F9:00_CsiPort", "0"},
239 {"INT33F9:00_CsiLanes", "1"},
240 {"INT33F9:00_CsiFmt", "13"},
241 {"INT33F9:00_CsiBayer", "0"},
242 {"INT33F9:00_CamClk", "1"},
246 static struct gmin_cfg_var ecs7_vars[] = {
247 {"INT33BE:00_CsiPort", "1"},
248 {"INT33BE:00_CsiLanes", "2"},
249 {"INT33BE:00_CsiFmt", "13"},
250 {"INT33BE:00_CsiBayer", "2"},
251 {"INT33BE:00_CamClk", "0"},
252 {"INT33F0:00_CsiPort", "0"},
253 {"INT33F0:00_CsiLanes", "1"},
254 {"INT33F0:00_CsiFmt", "13"},
255 {"INT33F0:00_CsiBayer", "0"},
256 {"INT33F0:00_CamClk", "1"},
257 {"gmin_V2P8GPIO", "402"},
261 static struct gmin_cfg_var i8880_vars[] = {
262 {"XXOV2680:00_CsiPort", "1"},
263 {"XXOV2680:00_CsiLanes", "1"},
264 {"XXOV2680:00_CamClk", "0"},
265 {"XXGC0310:00_CsiPort", "0"},
266 {"XXGC0310:00_CsiLanes", "1"},
267 {"XXGC0310:00_CamClk", "1"},
271 static const struct dmi_system_id gmin_vars[] = {
273 .ident = "BYT-T FFD8",
275 DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
277 .driver_data = ffrd8_vars,
282 DMI_MATCH(DMI_BOARD_NAME, "T100TA"),
284 .driver_data = t100_vars,
289 DMI_MATCH(DMI_BOARD_NAME, "TABLET"),
290 DMI_MATCH(DMI_BOARD_VERSION, "MRD 7"),
292 .driver_data = mrd7_vars,
297 DMI_MATCH(DMI_BOARD_NAME, "ST70408"),
299 .driver_data = ecs7_vars,
304 DMI_MATCH(DMI_BOARD_NAME, "VTA0803"),
306 .driver_data = i8880_vars,
311 #define GMIN_CFG_VAR_EFI_GUID EFI_GUID(0xecb54cd9, 0xe5ae, 0x4fdc, \
312 0xa9, 0x71, 0xe8, 0x77, \
313 0x75, 0x60, 0x68, 0xf7)
315 #define CFG_VAR_NAME_MAX 64
317 #define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */
318 static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME];
320 static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
324 struct i2c_client *client = v4l2_get_subdevdata(subdev);
327 pmic_id = PMIC_REGULATOR;
334 for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++)
336 if (i >= MAX_SUBDEVS)
340 "gmin: initializing atomisp module subdev data.PMIC ID %d\n",
343 gmin_subdevs[i].subdev = subdev;
344 gmin_subdevs[i].clock_num = gmin_get_var_int(dev, "CamClk", 0);
345 /*WA:CHT requires XTAL clock as PLL is not stable.*/
346 gmin_subdevs[i].clock_src = gmin_get_var_int(dev, "ClkSrc",
347 VLV2_CLK_PLL_19P2MHZ);
348 gmin_subdevs[i].csi_port = gmin_get_var_int(dev, "CsiPort", 0);
349 gmin_subdevs[i].csi_lanes = gmin_get_var_int(dev, "CsiLanes", 1);
351 /* get PMC clock with clock framework */
352 snprintf(gmin_pmc_clk_name,
353 sizeof(gmin_pmc_clk_name),
354 "%s_%d", "pmc_plt_clk", gmin_subdevs[i].clock_num);
356 gmin_subdevs[i].pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
357 if (IS_ERR(gmin_subdevs[i].pmc_clk)) {
358 ret = PTR_ERR(gmin_subdevs[i].pmc_clk);
361 "Failed to get clk from %s : %d\n",
369 * The firmware might enable the clock at
370 * boot (this information may or may not
371 * be reflected in the enable clock register).
372 * To change the rate we must disable the clock
373 * first to cover these cases. Due to common
374 * clock framework restrictions that do not allow
375 * to disable a clock that has not been enabled,
376 * we need to enable the clock first.
378 ret = clk_prepare_enable(gmin_subdevs[i].pmc_clk);
380 clk_disable_unprepare(gmin_subdevs[i].pmc_clk);
382 gmin_subdevs[i].gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
383 if (IS_ERR(gmin_subdevs[i].gpio0))
384 gmin_subdevs[i].gpio0 = NULL;
386 gmin_subdevs[i].gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW);
387 if (IS_ERR(gmin_subdevs[i].gpio1))
388 gmin_subdevs[i].gpio1 = NULL;
390 if (pmic_id == PMIC_REGULATOR) {
391 gmin_subdevs[i].v1p8_reg = regulator_get(dev, "V1P8SX");
392 gmin_subdevs[i].v2p8_reg = regulator_get(dev, "V2P8SX");
393 gmin_subdevs[i].v1p2_reg = regulator_get(dev, "V1P2A");
394 gmin_subdevs[i].v2p8_vcm_reg = regulator_get(dev, "VPROG4B");
396 /* Note: ideally we would initialize v[12]p8_on to the
397 * output of regulator_is_enabled(), but sadly that
398 * API is broken with the current drivers, returning
399 * "1" for a regulator that will then emit a
400 * "unbalanced disable" WARNing if we try to disable
405 return &gmin_subdevs[i];
408 static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
412 for (i = 0; i < MAX_SUBDEVS; i++)
413 if (gmin_subdevs[i].subdev == subdev)
414 return &gmin_subdevs[i];
415 return gmin_subdev_add(subdev);
418 static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on)
420 struct gmin_subdev *gs = find_gmin_subdev(subdev);
423 gpiod_set_value(gs->gpio0, on);
429 static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on)
431 struct gmin_subdev *gs = find_gmin_subdev(subdev);
434 gpiod_set_value(gs->gpio1, on);
440 static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on)
442 struct gmin_subdev *gs = find_gmin_subdev(subdev);
444 if (!gs || gs->v1p2_on == on)
450 return regulator_enable(gs->v1p2_reg);
452 return regulator_disable(gs->v1p2_reg);
455 /*TODO:v1p2 needs to extend to other PMICs*/
460 static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on)
462 struct gmin_subdev *gs = find_gmin_subdev(subdev);
465 if (v1p8_gpio == V1P8_GPIO_UNSET) {
466 v1p8_gpio = gmin_get_var_int(NULL, "V1P8GPIO", V1P8_GPIO_NONE);
467 if (v1p8_gpio != V1P8_GPIO_NONE) {
468 pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n",
470 ret = gpio_request(v1p8_gpio, "camera_v1p8_en");
472 ret = gpio_direction_output(v1p8_gpio, 0);
474 pr_err("V1P8 GPIO initialization failed\n");
478 if (!gs || gs->v1p8_on == on)
483 gpio_set_value(v1p8_gpio, on);
486 regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000);
488 return regulator_enable(gs->v1p8_reg);
490 return regulator_disable(gs->v1p8_reg);
496 static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on)
498 struct gmin_subdev *gs = find_gmin_subdev(subdev);
501 if (v2p8_gpio == V2P8_GPIO_UNSET) {
502 v2p8_gpio = gmin_get_var_int(NULL, "V2P8GPIO", V2P8_GPIO_NONE);
503 if (v2p8_gpio != V2P8_GPIO_NONE) {
504 pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n",
506 ret = gpio_request(v2p8_gpio, "camera_v2p8");
508 ret = gpio_direction_output(v2p8_gpio, 0);
510 pr_err("V2P8 GPIO initialization failed\n");
514 if (!gs || gs->v2p8_on == on)
519 gpio_set_value(v2p8_gpio, on);
522 regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000);
524 return regulator_enable(gs->v2p8_reg);
526 return regulator_disable(gs->v2p8_reg);
532 static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on)
535 struct gmin_subdev *gs = find_gmin_subdev(subdev);
536 struct i2c_client *client = v4l2_get_subdevdata(subdev);
538 if (gs->clock_on == !!on)
542 ret = clk_set_rate(gs->pmc_clk, gs->clock_src);
545 dev_err(&client->dev, "unable to set PMC rate %d\n",
548 ret = clk_prepare_enable(gs->pmc_clk);
552 clk_disable_unprepare(gs->pmc_clk);
553 gs->clock_on = false;
559 static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag)
561 struct i2c_client *client = v4l2_get_subdevdata(sd);
562 struct gmin_subdev *gs = find_gmin_subdev(sd);
567 return camera_sensor_csi(sd, gs->csi_port, gs->csi_lanes,
568 gs->csi_fmt, gs->csi_bayer, flag);
571 static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev,
574 struct i2c_client *client = v4l2_get_subdevdata(subdev);
575 struct gmin_subdev *gs = find_gmin_subdev(subdev);
576 struct camera_vcm_control *vcm;
578 if (client == NULL || gs == NULL)
584 mutex_lock(&vcm_lock);
585 list_for_each_entry(vcm, &vcm_devices, list) {
586 if (!strcmp(camera_module, vcm->camera_module)) {
587 mutex_unlock(&vcm_lock);
592 mutex_unlock(&vcm_lock);
596 static struct camera_sensor_platform_data gmin_plat = {
597 .gpio0_ctrl = gmin_gpio0_ctrl,
598 .gpio1_ctrl = gmin_gpio1_ctrl,
599 .v1p8_ctrl = gmin_v1p8_ctrl,
600 .v2p8_ctrl = gmin_v2p8_ctrl,
601 .v1p2_ctrl = gmin_v1p2_ctrl,
602 .flisclk_ctrl = gmin_flisclk_ctrl,
603 .csi_cfg = gmin_csi_cfg,
604 .get_vcm_ctrl = gmin_get_vcm_ctrl,
607 struct camera_sensor_platform_data *gmin_camera_platform_data(
608 struct v4l2_subdev *subdev,
609 enum atomisp_input_format csi_format,
610 enum atomisp_bayer_order csi_bayer)
612 struct gmin_subdev *gs = find_gmin_subdev(subdev);
614 gs->csi_fmt = csi_format;
615 gs->csi_bayer = csi_bayer;
619 EXPORT_SYMBOL_GPL(gmin_camera_platform_data);
621 int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl)
626 mutex_lock(&vcm_lock);
627 list_add_tail(&vcmCtrl->list, &vcm_devices);
628 mutex_unlock(&vcm_lock);
632 EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control);
634 static int gmin_get_hardcoded_var(struct gmin_cfg_var *varlist,
635 const char *var8, char *out, size_t *out_len)
637 struct gmin_cfg_var *gv;
639 for (gv = varlist; gv->name; gv++) {
642 if (strcmp(var8, gv->name))
645 vl = strlen(gv->val);
646 if (vl > *out_len - 1)
649 strcpy(out, gv->val);
657 /* Retrieves a device-specific configuration variable. The dev
658 * argument should be a device with an ACPI companion, as all
659 * configuration is based on firmware ID.
661 static int gmin_get_config_var(struct device *dev, const char *var,
662 char *out, size_t *out_len)
664 char var8[CFG_VAR_NAME_MAX];
665 efi_char16_t var16[CFG_VAR_NAME_MAX];
666 struct efivar_entry *ev;
667 const struct dmi_system_id *id;
670 if (dev && ACPI_COMPANION(dev))
671 dev = &ACPI_COMPANION(dev)->dev;
674 ret = snprintf(var8, sizeof(var8), "%s_%s", dev_name(dev), var);
676 ret = snprintf(var8, sizeof(var8), "gmin_%s", var);
678 if (ret < 0 || ret >= sizeof(var8) - 1)
681 /* First check a hard-coded list of board-specific variables.
682 * Some device firmwares lack the ability to set EFI variables at
685 id = dmi_first_match(gmin_vars);
687 return gmin_get_hardcoded_var(id->driver_data, var8, out, out_len);
689 /* Our variable names are ASCII by construction, but EFI names
690 * are wide chars. Convert and zero-pad.
692 memset(var16, 0, sizeof(var16));
693 for (i = 0; i < sizeof(var8) && var8[i]; i++)
696 /* Not sure this API usage is kosher; efivar_entry_get()'s
697 * implementation simply uses VariableName and VendorGuid from
698 * the struct and ignores the rest, but it seems like there
699 * ought to be an "official" efivar_entry registered
702 ev = kzalloc(sizeof(*ev), GFP_KERNEL);
705 memcpy(&ev->var.VariableName, var16, sizeof(var16));
706 ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID;
707 ev->var.DataSize = *out_len;
709 ret = efivar_entry_get(ev, &ev->var.Attributes,
710 &ev->var.DataSize, ev->var.Data);
712 memcpy(out, ev->var.Data, ev->var.DataSize);
713 *out_len = ev->var.DataSize;
715 dev_warn(dev, "Failed to find gmin variable %s\n", var8);
723 int gmin_get_var_int(struct device *dev, const char *var, int def)
725 char val[CFG_VAR_NAME_MAX];
726 size_t len = sizeof(val);
730 ret = gmin_get_config_var(dev, var, val, &len);
733 ret = kstrtol(val, 0, &result);
736 return ret ? def : result;
738 EXPORT_SYMBOL_GPL(gmin_get_var_int);
740 int camera_sensor_csi(struct v4l2_subdev *sd, u32 port,
741 u32 lanes, u32 format, u32 bayer_order, int flag)
743 struct i2c_client *client = v4l2_get_subdevdata(sd);
744 struct camera_mipi_info *csi = NULL;
747 csi = kzalloc(sizeof(*csi), GFP_KERNEL);
751 csi->num_lanes = lanes;
752 csi->input_format = format;
753 csi->raw_bayer_order = bayer_order;
754 v4l2_set_subdev_hostdata(sd, (void *)csi);
755 csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED;
756 csi->metadata_effective_width = NULL;
757 dev_info(&client->dev,
758 "camera pdata: port: %d lanes: %d order: %8.8x\n",
759 port, lanes, bayer_order);
761 csi = v4l2_get_subdev_hostdata(sd);
767 EXPORT_SYMBOL_GPL(camera_sensor_csi);
769 /* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't
770 * work. Disable so the kernel framework doesn't hang the device
771 * trying. The driver itself does direct calls to the PUNIT to manage
774 static void isp_pm_cap_fixup(struct pci_dev *dev)
776 dev_info(&dev->dev, "Disabling PCI power management on camera ISP\n");
779 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup);