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path: root/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c
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Diffstat (limited to 'drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c')
-rw-r--r--drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c785
1 files changed, 0 insertions, 785 deletions
diff --git a/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c
deleted file mode 100644
index 3283c1b05d6a..000000000000
--- a/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c
+++ /dev/null
@@ -1,785 +0,0 @@
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/dmi.h>
-#include <linux/efi.h>
-#include <linux/pci.h>
-#include <linux/acpi.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <media/v4l2-subdev.h>
-#include <linux/mfd/intel_soc_pmic.h>
-#include <linux/regulator/consumer.h>
-#include <linux/gpio/consumer.h>
-#include <linux/gpio.h>
-#include <linux/platform_device.h>
-#include "../../include/linux/atomisp_platform.h"
-#include "../../include/linux/atomisp_gmin_platform.h"
-
-#define MAX_SUBDEVS 8
-
-#define VLV2_CLK_PLL_19P2MHZ 1 /* XTAL on CHT */
-#define ELDO1_SEL_REG 0x19
-#define ELDO1_1P8V 0x16
-#define ELDO1_CTRL_SHIFT 0x00
-#define ELDO2_SEL_REG 0x1a
-#define ELDO2_1P8V 0x16
-#define ELDO2_CTRL_SHIFT 0x01
-
-struct gmin_subdev {
- struct v4l2_subdev *subdev;
- int clock_num;
- int clock_src;
- bool clock_on;
- struct clk *pmc_clk;
- struct gpio_desc *gpio0;
- struct gpio_desc *gpio1;
- struct regulator *v1p8_reg;
- struct regulator *v2p8_reg;
- struct regulator *v1p2_reg;
- struct regulator *v2p8_vcm_reg;
- enum atomisp_camera_port csi_port;
- unsigned int csi_lanes;
- enum atomisp_input_format csi_fmt;
- enum atomisp_bayer_order csi_bayer;
- bool v1p8_on;
- bool v2p8_on;
- bool v1p2_on;
- bool v2p8_vcm_on;
-};
-
-static struct gmin_subdev gmin_subdevs[MAX_SUBDEVS];
-
-static enum { PMIC_UNSET = 0, PMIC_REGULATOR, PMIC_AXP, PMIC_TI,
- PMIC_CRYSTALCOVE } pmic_id;
-
-/* The atomisp uses type==0 for the end-of-list marker, so leave space. */
-static struct intel_v4l2_subdev_table pdata_subdevs[MAX_SUBDEVS + 1];
-
-static const struct atomisp_platform_data pdata = {
- .subdevs = pdata_subdevs,
-};
-
-/*
- * Something of a hack. The ECS E7 board drives camera 2.8v from an
- * external regulator instead of the PMIC. There's a gmin_CamV2P8
- * config variable that specifies the GPIO to handle this particular
- * case, but this needs a broader architecture for handling camera
- * power.
- */
-enum { V2P8_GPIO_UNSET = -2, V2P8_GPIO_NONE = -1 };
-static int v2p8_gpio = V2P8_GPIO_UNSET;
-
-/*
- * Something of a hack. The CHT RVP board drives camera 1.8v from an
- * external regulator instead of the PMIC just like ECS E7 board, see the
- * comments above.
- */
-enum { V1P8_GPIO_UNSET = -2, V1P8_GPIO_NONE = -1 };
-static int v1p8_gpio = V1P8_GPIO_UNSET;
-
-static LIST_HEAD(vcm_devices);
-static DEFINE_MUTEX(vcm_lock);
-
-static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev);
-
-/*
- * Legacy/stub behavior copied from upstream platform_camera.c. The
- * atomisp driver relies on these values being non-NULL in a few
- * places, even though they are hard-coded in all current
- * implementations.
- */
-const struct atomisp_camera_caps *atomisp_get_default_camera_caps(void)
-{
- static const struct atomisp_camera_caps caps = {
- .sensor_num = 1,
- .sensor = {
- { .stream_num = 1, },
- },
- };
- return &caps;
-}
-EXPORT_SYMBOL_GPL(atomisp_get_default_camera_caps);
-
-const struct atomisp_platform_data *atomisp_get_platform_data(void)
-{
- return &pdata;
-}
-EXPORT_SYMBOL_GPL(atomisp_get_platform_data);
-
-int atomisp_register_i2c_module(struct v4l2_subdev *subdev,
- struct camera_sensor_platform_data *plat_data,
- enum intel_v4l2_subdev_type type)
-{
- int i;
- struct i2c_board_info *bi;
- struct gmin_subdev *gs;
- struct i2c_client *client = v4l2_get_subdevdata(subdev);
- struct acpi_device *adev = ACPI_COMPANION(&client->dev);
-
- dev_info(&client->dev, "register atomisp i2c module type %d\n", type);
-
- /* The windows driver model (and thus most BIOSes by default)
- * uses ACPI runtime power management for camera devices, but
- * we don't. Disable it, or else the rails will be needlessly
- * tickled during suspend/resume. This has caused power and
- * performance issues on multiple devices.
- */
- adev->power.flags.power_resources = 0;
-
- for (i = 0; i < MAX_SUBDEVS; i++)
- if (!pdata.subdevs[i].type)
- break;
-
- if (pdata.subdevs[i].type)
- return -ENOMEM;
-
- /* Note subtlety of initialization order: at the point where
- * this registration API gets called, the platform data
- * callbacks have probably already been invoked, so the
- * gmin_subdev struct is already initialized for us.
- */
- gs = find_gmin_subdev(subdev);
-
- pdata.subdevs[i].type = type;
- pdata.subdevs[i].port = gs->csi_port;
- pdata.subdevs[i].subdev = subdev;
- pdata.subdevs[i].v4l2_subdev.i2c_adapter_id = client->adapter->nr;
-
- /* Convert i2c_client to i2c_board_info */
- bi = &pdata.subdevs[i].v4l2_subdev.board_info;
- memcpy(bi->type, client->name, I2C_NAME_SIZE);
- bi->flags = client->flags;
- bi->addr = client->addr;
- bi->irq = client->irq;
- bi->platform_data = plat_data;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(atomisp_register_i2c_module);
-
-struct v4l2_subdev *atomisp_gmin_find_subdev(struct i2c_adapter *adapter,
- struct i2c_board_info *board_info)
-{
- int i;
-
- for (i = 0; i < MAX_SUBDEVS && pdata.subdevs[i].type; i++) {
- struct intel_v4l2_subdev_table *sd = &pdata.subdevs[i];
-
- if (sd->v4l2_subdev.i2c_adapter_id == adapter->nr &&
- sd->v4l2_subdev.board_info.addr == board_info->addr)
- return sd->subdev;
- }
- return NULL;
-}
-EXPORT_SYMBOL_GPL(atomisp_gmin_find_subdev);
-
-int atomisp_gmin_remove_subdev(struct v4l2_subdev *sd)
-{
- int i, j;
-
- if (!sd)
- return 0;
-
- for (i = 0; i < MAX_SUBDEVS; i++) {
- if (pdata.subdevs[i].subdev == sd) {
- for (j = i + 1; j <= MAX_SUBDEVS; j++)
- pdata.subdevs[j - 1] = pdata.subdevs[j];
- }
- if (gmin_subdevs[i].subdev == sd) {
- if (gmin_subdevs[i].gpio0)
- gpiod_put(gmin_subdevs[i].gpio0);
- gmin_subdevs[i].gpio0 = NULL;
- if (gmin_subdevs[i].gpio1)
- gpiod_put(gmin_subdevs[i].gpio1);
- gmin_subdevs[i].gpio1 = NULL;
- if (pmic_id == PMIC_REGULATOR) {
- regulator_put(gmin_subdevs[i].v1p8_reg);
- regulator_put(gmin_subdevs[i].v2p8_reg);
- regulator_put(gmin_subdevs[i].v1p2_reg);
- regulator_put(gmin_subdevs[i].v2p8_vcm_reg);
- }
- gmin_subdevs[i].subdev = NULL;
- }
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(atomisp_gmin_remove_subdev);
-
-struct gmin_cfg_var {
- const char *name, *val;
-};
-
-static struct gmin_cfg_var ffrd8_vars[] = {
- { "INTCF1B:00_ImxId", "0x134" },
- { "INTCF1B:00_CsiPort", "1" },
- { "INTCF1B:00_CsiLanes", "4" },
- { "INTCF1B:00_CamClk", "0" },
- {},
-};
-
-/* Cribbed from MCG defaults in the mt9m114 driver, not actually verified
- * vs. T100 hardware
- */
-static struct gmin_cfg_var t100_vars[] = {
- { "INT33F0:00_CsiPort", "0" },
- { "INT33F0:00_CsiLanes", "1" },
- { "INT33F0:00_CamClk", "1" },
- {},
-};
-
-static struct gmin_cfg_var mrd7_vars[] = {
- {"INT33F8:00_CamType", "1"},
- {"INT33F8:00_CsiPort", "1"},
- {"INT33F8:00_CsiLanes", "2"},
- {"INT33F8:00_CsiFmt", "13"},
- {"INT33F8:00_CsiBayer", "0"},
- {"INT33F8:00_CamClk", "0"},
- {"INT33F9:00_CamType", "1"},
- {"INT33F9:00_CsiPort", "0"},
- {"INT33F9:00_CsiLanes", "1"},
- {"INT33F9:00_CsiFmt", "13"},
- {"INT33F9:00_CsiBayer", "0"},
- {"INT33F9:00_CamClk", "1"},
- {},
-};
-
-static struct gmin_cfg_var ecs7_vars[] = {
- {"INT33BE:00_CsiPort", "1"},
- {"INT33BE:00_CsiLanes", "2"},
- {"INT33BE:00_CsiFmt", "13"},
- {"INT33BE:00_CsiBayer", "2"},
- {"INT33BE:00_CamClk", "0"},
- {"INT33F0:00_CsiPort", "0"},
- {"INT33F0:00_CsiLanes", "1"},
- {"INT33F0:00_CsiFmt", "13"},
- {"INT33F0:00_CsiBayer", "0"},
- {"INT33F0:00_CamClk", "1"},
- {"gmin_V2P8GPIO", "402"},
- {},
-};
-
-static struct gmin_cfg_var i8880_vars[] = {
- {"XXOV2680:00_CsiPort", "1"},
- {"XXOV2680:00_CsiLanes", "1"},
- {"XXOV2680:00_CamClk", "0"},
- {"XXGC0310:00_CsiPort", "0"},
- {"XXGC0310:00_CsiLanes", "1"},
- {"XXGC0310:00_CamClk", "1"},
- {},
-};
-
-static const struct dmi_system_id gmin_vars[] = {
- {
- .ident = "BYT-T FFD8",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8"),
- },
- .driver_data = ffrd8_vars,
- },
- {
- .ident = "T100TA",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "T100TA"),
- },
- .driver_data = t100_vars,
- },
- {
- .ident = "MRD7",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "TABLET"),
- DMI_MATCH(DMI_BOARD_VERSION, "MRD 7"),
- },
- .driver_data = mrd7_vars,
- },
- {
- .ident = "ST70408",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "ST70408"),
- },
- .driver_data = ecs7_vars,
- },
- {
- .ident = "VTA0803",
- .matches = {
- DMI_MATCH(DMI_BOARD_NAME, "VTA0803"),
- },
- .driver_data = i8880_vars,
- },
- {}
-};
-
-#define GMIN_CFG_VAR_EFI_GUID EFI_GUID(0xecb54cd9, 0xe5ae, 0x4fdc, \
- 0xa9, 0x71, 0xe8, 0x77, \
- 0x75, 0x60, 0x68, 0xf7)
-
-#define CFG_VAR_NAME_MAX 64
-
-#define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */
-static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME];
-
-static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev)
-{
- int i, ret;
- struct device *dev;
- struct i2c_client *client = v4l2_get_subdevdata(subdev);
-
- if (!pmic_id)
- pmic_id = PMIC_REGULATOR;
-
- if (!client)
- return NULL;
-
- dev = &client->dev;
-
- for (i = 0; i < MAX_SUBDEVS && gmin_subdevs[i].subdev; i++)
- ;
- if (i >= MAX_SUBDEVS)
- return NULL;
-
- dev_info(dev,
- "gmin: initializing atomisp module subdev data.PMIC ID %d\n",
- pmic_id);
-
- gmin_subdevs[i].subdev = subdev;
- gmin_subdevs[i].clock_num = gmin_get_var_int(dev, "CamClk", 0);
- /*WA:CHT requires XTAL clock as PLL is not stable.*/
- gmin_subdevs[i].clock_src = gmin_get_var_int(dev, "ClkSrc",
- VLV2_CLK_PLL_19P2MHZ);
- gmin_subdevs[i].csi_port = gmin_get_var_int(dev, "CsiPort", 0);
- gmin_subdevs[i].csi_lanes = gmin_get_var_int(dev, "CsiLanes", 1);
-
- /* get PMC clock with clock framework */
- snprintf(gmin_pmc_clk_name,
- sizeof(gmin_pmc_clk_name),
- "%s_%d", "pmc_plt_clk", gmin_subdevs[i].clock_num);
-
- gmin_subdevs[i].pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name);
- if (IS_ERR(gmin_subdevs[i].pmc_clk)) {
- ret = PTR_ERR(gmin_subdevs[i].pmc_clk);
-
- dev_err(dev,
- "Failed to get clk from %s : %d\n",
- gmin_pmc_clk_name,
- ret);
-
- return NULL;
- }
-
- /*
- * The firmware might enable the clock at
- * boot (this information may or may not
- * be reflected in the enable clock register).
- * To change the rate we must disable the clock
- * first to cover these cases. Due to common
- * clock framework restrictions that do not allow
- * to disable a clock that has not been enabled,
- * we need to enable the clock first.
- */
- ret = clk_prepare_enable(gmin_subdevs[i].pmc_clk);
- if (!ret)
- clk_disable_unprepare(gmin_subdevs[i].pmc_clk);
-
- gmin_subdevs[i].gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
- if (IS_ERR(gmin_subdevs[i].gpio0))
- gmin_subdevs[i].gpio0 = NULL;
-
- gmin_subdevs[i].gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW);
- if (IS_ERR(gmin_subdevs[i].gpio1))
- gmin_subdevs[i].gpio1 = NULL;
-
- if (pmic_id == PMIC_REGULATOR) {
- gmin_subdevs[i].v1p8_reg = regulator_get(dev, "V1P8SX");
- gmin_subdevs[i].v2p8_reg = regulator_get(dev, "V2P8SX");
- gmin_subdevs[i].v1p2_reg = regulator_get(dev, "V1P2A");
- gmin_subdevs[i].v2p8_vcm_reg = regulator_get(dev, "VPROG4B");
-
- /* Note: ideally we would initialize v[12]p8_on to the
- * output of regulator_is_enabled(), but sadly that
- * API is broken with the current drivers, returning
- * "1" for a regulator that will then emit a
- * "unbalanced disable" WARNing if we try to disable
- * it.
- */
- }
-
- return &gmin_subdevs[i];
-}
-
-static struct gmin_subdev *find_gmin_subdev(struct v4l2_subdev *subdev)
-{
- int i;
-
- for (i = 0; i < MAX_SUBDEVS; i++)
- if (gmin_subdevs[i].subdev == subdev)
- return &gmin_subdevs[i];
- return gmin_subdev_add(subdev);
-}
-
-static int gmin_gpio0_ctrl(struct v4l2_subdev *subdev, int on)
-{
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
-
- if (gs) {
- gpiod_set_value(gs->gpio0, on);
- return 0;
- }
- return -EINVAL;
-}
-
-static int gmin_gpio1_ctrl(struct v4l2_subdev *subdev, int on)
-{
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
-
- if (gs) {
- gpiod_set_value(gs->gpio1, on);
- return 0;
- }
- return -EINVAL;
-}
-
-static int gmin_v1p2_ctrl(struct v4l2_subdev *subdev, int on)
-{
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
-
- if (!gs || gs->v1p2_on == on)
- return 0;
- gs->v1p2_on = on;
-
- if (gs->v1p2_reg) {
- if (on)
- return regulator_enable(gs->v1p2_reg);
- else
- return regulator_disable(gs->v1p2_reg);
- }
-
- /*TODO:v1p2 needs to extend to other PMICs*/
-
- return -EINVAL;
-}
-
-static int gmin_v1p8_ctrl(struct v4l2_subdev *subdev, int on)
-{
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
- int ret;
-
- if (v1p8_gpio == V1P8_GPIO_UNSET) {
- v1p8_gpio = gmin_get_var_int(NULL, "V1P8GPIO", V1P8_GPIO_NONE);
- if (v1p8_gpio != V1P8_GPIO_NONE) {
- pr_info("atomisp_gmin_platform: 1.8v power on GPIO %d\n",
- v1p8_gpio);
- ret = gpio_request(v1p8_gpio, "camera_v1p8_en");
- if (!ret)
- ret = gpio_direction_output(v1p8_gpio, 0);
- if (ret)
- pr_err("V1P8 GPIO initialization failed\n");
- }
- }
-
- if (!gs || gs->v1p8_on == on)
- return 0;
- gs->v1p8_on = on;
-
- if (v1p8_gpio >= 0)
- gpio_set_value(v1p8_gpio, on);
-
- if (gs->v1p8_reg) {
- regulator_set_voltage(gs->v1p8_reg, 1800000, 1800000);
- if (on)
- return regulator_enable(gs->v1p8_reg);
- else
- return regulator_disable(gs->v1p8_reg);
- }
-
- return -EINVAL;
-}
-
-static int gmin_v2p8_ctrl(struct v4l2_subdev *subdev, int on)
-{
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
- int ret;
-
- if (v2p8_gpio == V2P8_GPIO_UNSET) {
- v2p8_gpio = gmin_get_var_int(NULL, "V2P8GPIO", V2P8_GPIO_NONE);
- if (v2p8_gpio != V2P8_GPIO_NONE) {
- pr_info("atomisp_gmin_platform: 2.8v power on GPIO %d\n",
- v2p8_gpio);
- ret = gpio_request(v2p8_gpio, "camera_v2p8");
- if (!ret)
- ret = gpio_direction_output(v2p8_gpio, 0);
- if (ret)
- pr_err("V2P8 GPIO initialization failed\n");
- }
- }
-
- if (!gs || gs->v2p8_on == on)
- return 0;
- gs->v2p8_on = on;
-
- if (v2p8_gpio >= 0)
- gpio_set_value(v2p8_gpio, on);
-
- if (gs->v2p8_reg) {
- regulator_set_voltage(gs->v2p8_reg, 2900000, 2900000);
- if (on)
- return regulator_enable(gs->v2p8_reg);
- else
- return regulator_disable(gs->v2p8_reg);
- }
-
- return -EINVAL;
-}
-
-static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on)
-{
- int ret = 0;
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
- struct i2c_client *client = v4l2_get_subdevdata(subdev);
-
- if (gs->clock_on == !!on)
- return 0;
-
- if (on) {
- ret = clk_set_rate(gs->pmc_clk, gs->clock_src);
-
- if (ret)
- dev_err(&client->dev, "unable to set PMC rate %d\n",
- gs->clock_src);
-
- ret = clk_prepare_enable(gs->pmc_clk);
- if (ret == 0)
- gs->clock_on = true;
- } else {
- clk_disable_unprepare(gs->pmc_clk);
- gs->clock_on = false;
- }
-
- return ret;
-}
-
-static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag)
-{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct gmin_subdev *gs = find_gmin_subdev(sd);
-
- if (!client || !gs)
- return -ENODEV;
-
- return camera_sensor_csi(sd, gs->csi_port, gs->csi_lanes,
- gs->csi_fmt, gs->csi_bayer, flag);
-}
-
-static struct camera_vcm_control *gmin_get_vcm_ctrl(struct v4l2_subdev *subdev,
- char *camera_module)
-{
- struct i2c_client *client = v4l2_get_subdevdata(subdev);
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
- struct camera_vcm_control *vcm;
-
- if (client == NULL || gs == NULL)
- return NULL;
-
- if (!camera_module)
- return NULL;
-
- mutex_lock(&vcm_lock);
- list_for_each_entry(vcm, &vcm_devices, list) {
- if (!strcmp(camera_module, vcm->camera_module)) {
- mutex_unlock(&vcm_lock);
- return vcm;
- }
- }
-
- mutex_unlock(&vcm_lock);
- return NULL;
-}
-
-static struct camera_sensor_platform_data gmin_plat = {
- .gpio0_ctrl = gmin_gpio0_ctrl,
- .gpio1_ctrl = gmin_gpio1_ctrl,
- .v1p8_ctrl = gmin_v1p8_ctrl,
- .v2p8_ctrl = gmin_v2p8_ctrl,
- .v1p2_ctrl = gmin_v1p2_ctrl,
- .flisclk_ctrl = gmin_flisclk_ctrl,
- .csi_cfg = gmin_csi_cfg,
- .get_vcm_ctrl = gmin_get_vcm_ctrl,
-};
-
-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)
-{
- struct gmin_subdev *gs = find_gmin_subdev(subdev);
-
- gs->csi_fmt = csi_format;
- gs->csi_bayer = csi_bayer;
-
- return &gmin_plat;
-}
-EXPORT_SYMBOL_GPL(gmin_camera_platform_data);
-
-int atomisp_gmin_register_vcm_control(struct camera_vcm_control *vcmCtrl)
-{
- if (!vcmCtrl)
- return -EINVAL;
-
- mutex_lock(&vcm_lock);
- list_add_tail(&vcmCtrl->list, &vcm_devices);
- mutex_unlock(&vcm_lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(atomisp_gmin_register_vcm_control);
-
-static int gmin_get_hardcoded_var(struct gmin_cfg_var *varlist,
- const char *var8, char *out, size_t *out_len)
-{
- struct gmin_cfg_var *gv;
-
- for (gv = varlist; gv->name; gv++) {
- size_t vl;
-
- if (strcmp(var8, gv->name))
- continue;
-
- vl = strlen(gv->val);
- if (vl > *out_len - 1)
- return -ENOSPC;
-
- strcpy(out, gv->val);
- *out_len = vl;
- return 0;
- }
-
- return -EINVAL;
-}
-
-/* Retrieves a device-specific configuration variable. The dev
- * argument should be a device with an ACPI companion, as all
- * configuration is based on firmware ID.
- */
-static int gmin_get_config_var(struct device *dev, const char *var,
- char *out, size_t *out_len)
-{
- char var8[CFG_VAR_NAME_MAX];
- efi_char16_t var16[CFG_VAR_NAME_MAX];
- struct efivar_entry *ev;
- const struct dmi_system_id *id;
- int i, ret;
-
- if (dev && ACPI_COMPANION(dev))
- dev = &ACPI_COMPANION(dev)->dev;
-
- if (dev)
- ret = snprintf(var8, sizeof(var8), "%s_%s", dev_name(dev), var);
- else
- ret = snprintf(var8, sizeof(var8), "gmin_%s", var);
-
- if (ret < 0 || ret >= sizeof(var8) - 1)
- return -EINVAL;
-
- /* First check a hard-coded list of board-specific variables.
- * Some device firmwares lack the ability to set EFI variables at
- * runtime.
- */
- id = dmi_first_match(gmin_vars);
- if (id)
- return gmin_get_hardcoded_var(id->driver_data, var8, out, out_len);
-
- /* Our variable names are ASCII by construction, but EFI names
- * are wide chars. Convert and zero-pad.
- */
- memset(var16, 0, sizeof(var16));
- for (i = 0; i < sizeof(var8) && var8[i]; i++)
- var16[i] = var8[i];
-
-#ifdef CONFIG_64BIT
- /* To avoid owerflows when calling the efivar API */
- if (*out_len > ULONG_MAX)
- return -EINVAL;
-#endif
-
- /* Not sure this API usage is kosher; efivar_entry_get()'s
- * implementation simply uses VariableName and VendorGuid from
- * the struct and ignores the rest, but it seems like there
- * ought to be an "official" efivar_entry registered
- * somewhere?
- */
- ev = kzalloc(sizeof(*ev), GFP_KERNEL);
- if (!ev)
- return -ENOMEM;
- memcpy(&ev->var.VariableName, var16, sizeof(var16));
- ev->var.VendorGuid = GMIN_CFG_VAR_EFI_GUID;
- ev->var.DataSize = *out_len;
-
- ret = efivar_entry_get(ev, &ev->var.Attributes,
- &ev->var.DataSize, ev->var.Data);
- if (ret == 0) {
- memcpy(out, ev->var.Data, ev->var.DataSize);
- *out_len = ev->var.DataSize;
- } else if (dev) {
- dev_warn(dev, "Failed to find gmin variable %s\n", var8);
- }
-
- kfree(ev);
-
- return ret;
-}
-
-int gmin_get_var_int(struct device *dev, const char *var, int def)
-{
- char val[CFG_VAR_NAME_MAX];
- size_t len = sizeof(val);
- long result;
- int ret;
-
- ret = gmin_get_config_var(dev, var, val, &len);
- if (!ret) {
- val[len] = 0;
- ret = kstrtol(val, 0, &result);
- }
-
- return ret ? def : result;
-}
-EXPORT_SYMBOL_GPL(gmin_get_var_int);
-
-int camera_sensor_csi(struct v4l2_subdev *sd, u32 port,
- u32 lanes, u32 format, u32 bayer_order, int flag)
-{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct camera_mipi_info *csi = NULL;
-
- if (flag) {
- csi = kzalloc(sizeof(*csi), GFP_KERNEL);
- if (!csi)
- return -ENOMEM;
- csi->port = port;
- csi->num_lanes = lanes;
- csi->input_format = format;
- csi->raw_bayer_order = bayer_order;
- v4l2_set_subdev_hostdata(sd, (void *)csi);
- csi->metadata_format = ATOMISP_INPUT_FORMAT_EMBEDDED;
- csi->metadata_effective_width = NULL;
- dev_info(&client->dev,
- "camera pdata: port: %d lanes: %d order: %8.8x\n",
- port, lanes, bayer_order);
- } else {
- csi = v4l2_get_subdev_hostdata(sd);
- kfree(csi);
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(camera_sensor_csi);
-
-/* PCI quirk: The BYT ISP advertises PCI runtime PM but it doesn't
- * work. Disable so the kernel framework doesn't hang the device
- * trying. The driver itself does direct calls to the PUNIT to manage
- * ISP power.
- */
-static void isp_pm_cap_fixup(struct pci_dev *dev)
-{
- dev_info(&dev->dev, "Disabling PCI power management on camera ISP\n");
- dev->pm_cap = 0;
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0f38, isp_pm_cap_fixup);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.