/* * MAX77387.c - MAX77387 flash/torch kernel driver * * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /* Implementation * -------------- * The board level details about the device need to be provided in the board * file with the max77387_platform_data structure. * Standard among NVC kernel drivers in this structure is: * .cfg = Use the NVC_CFG_ defines that are in nvc_torch.h. * Descriptions of the configuration options are with the defines. * This value is typically 0. * .num = The number of the instance of the device. This should start at 1 and * and increment for each device on the board. This number will be * appended to the MISC driver name, Example: /dev/torch.1 * .dev_name = The MISC driver name the device registers as. If not used, * then the part number of the device is used for the driver name. * If using the NVC user driver then use the name found in this * driver under _default_pdata. * * The following is specific to NVC kernel flash/torch drivers: * .pinstate = a pointer to the nvc_torch_pin_state structure. This * structure gives the details of which VI GPIO to use to trigger * the flash. The mask tells which pin and the values is the * level. For example, if VI GPIO pin 6 is used, then * .mask = 0x0040 * .values = 0x0040 * If VI GPIO pin 0 is used, then * .mask = 0x0001 * .values = 0x0001 * This is typically just one pin but there is some legacy * here that insinuates more than one pin can be used. * When the flash level is set, then the driver will return the * value in values. When the flash level is off, the driver will * return 0 for the values to deassert the signal. * If a VI GPIO is not used, then the mask and values must be set * to 0. The flash may then be triggered via I2C instead. * However, a VI GPIO is strongly encouraged since it allows * tighter timing with the picture taken as well as reduced power * by asserting the trigger signal for only when needed. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MAX77387_RO_CHIPID1 0x00 #define MAX77387_RO_CHIPID2 0x01 #define MAX77387_RO_FLASH_STATUS 0x02 #define MAX77387_RO_FLASH_STATUS2 0x03 #define MAX77387_RW_FLASH_FLED1CURR 0x04 #define MAX77387_RW_FLASH_FLED2CURR 0x05 #define MAX77387_RW_TORCH_FLED1CURR 0x06 #define MAX77387_RW_TORCH_FLED2CURR 0x07 #define MAX77387_RW_FLED_MODE 0x08 #define MAX77387_RW_TX1_MASK 0x09 #define MAX77387_RW_TX2_MASK 0x0A #define MAX77387_RW_FLASH_RAMP 0x0B #define MAX77387_RW_TORCH_RAMP 0x0C #define MAX77387_RW_FLASH_TIMER 0x0D #define MAX77387_RW_TORCH_TIMER 0x0E #define MAX77387_RW_MAXFLASH_HYS_TH 0x10 #define MAX77387_RW_MAXFLASH_LB_TMR 0x11 #define MAX77387_RO_MAXFLASH_FLED1_IMIN 0x12 #define MAX77387_RO_MAXFLASH_FLED2_IMIN 0x13 #define MAX77387_RW_NTC 0x14 #define MAX77387_RW_DCDC_CNTL1 0X15 #define MAX77387_RW_DCDC_CNTL2 0X16 #define MAX77387_RW_DCDC_ILIM 0X17 #define MAX77387_RO_DCDC_OUT 0X18 #define MAX77387_RO_DCDC_MAX 0X19 #define FIELD(x, y) ((x) << (y)) #define FMASK(x) FIELD(7, (x)) #define TORCH_TIMER_SAFETY_DIS 0x1 #define TIMER_ONESHOT 0x0 #define TIMER_MAX 0x1 #define TTIMER_DIS 0x1 #define TORCH_TIMER_CTL_MASK (FIELD(TIMER_MAX, 7) | \ FIELD(TORCH_TIMER_SAFETY_DIS, 6)) #define TORCH_MODE_SHIFT 3 #define FLASH_MODE_SHIFT 0 #define TORCH_TRIG_MASK FMASK(TORCH_MODE_SHIFT) #define FLASH_TRIG_MASK FMASK(FLASH_MODE_SHIFT) /* TO DO: Need to confirm with maxim these trigger settings */ #define TRIG_MODE_OFF 0x00 #define TRIG_MODE_FLASHEN 0x02 #define TRIG_MODE_TORCHEN 0x01 #define TRIG_MODE_FANDT 0x03 #define TRIG_MODE_FORT 0x04 #define TRIG_MODE_I2C 0x05 #define TORCH_TRIG_BY_I2C FIELD(TRIG_MODE_I2C, TORCH_MODE_SHIFT) #define TORCH_TRIG_BY_FLASHEN FIELD(TRIG_MODE_FLASHEN, TORCH_MODE_SHIFT) #define TORCH_TRIG_BY_TORCHEN FIELD(TRIG_MODE_TORCHEN, TORCH_MODE_SHIFT) #define TORCH_TRIG_BY_FANDT FIELD(TRIG_MODE_FANDT, TORCH_MODE_SHIFT) #define TORCH_TRIG_BY_FORT FIELD(TRIG_MODE_FORT, TORCH_MODE_SHIFT) #define FLASH_TRIG_BY_I2C FIELD(TRIG_MODE_I2C, FLASH_MODE_SHIFT) #define FLASH_TRIG_BY_FLASHEN FIELD(TRIG_MODE_FLASHEN, FLASH_MODE_SHIFT) #define FLASH_TRIG_BY_TORCHEN FIELD(TRIG_MODE_TORCHEN, FLASH_MODE_SHIFT) #define FLASH_TRIG_BY_FANDT FIELD(TRIG_MODE_FANDT, FLASH_MODE_SHIFT) #define FLASH_TRIG_BY_FORT FIELD(TRIG_MODE_FORT, FLASH_MODE_SHIFT) #define FLASH_ENABLE FIELD(1, 7) #define FLASH_CURRENT(x) (FLASH_ENABLE | FIELD((x), 0)) #define TORCH_ENABLE FIELD(1, 7) #define TORCH_CURRENT(x) (TORCH_ENABLE | FIELD((x), 1)) #define MAXFLASH_DISABLE 0 #define MAXFLASH_ENABLE 1 #define MAXFLASH_VOLT_HYS_FLOOR 100 /* mV */ #define MAXFLASH_VOLT_HYS_CEILING 300 /* mV */ #define MAXFLASH_VOLT_HYS_STEP 100 /* mV */ #define MAXFLASH_V_TH_FLOOR 2400 /* mV */ #define MAXFLASH_V_TH_CEILING 3400 /* mV */ #define MAXFLASH_V_TH_STEP 33 /* mV */ #define MAXFLASH_TIMER_STEP 256 /* uS */ #define MAX77387_LED_NUM 2 #define MAX77387_FLASH_LEVELS (1 << 6) #define MAX77387_MAX_FLASH_LEVEL (MAX77387_FLASH_LEVELS + 1) #define MAX77387_TORCH_LEVELS (1 << 6) #define MAX77387_MAX_TORCH_LEVEL (MAX77387_TORCH_LEVELS + 1) #define MAX77387_LEVEL_OFF 0xFFFF #define MAX77387_MAX_FLASH_CURRENT(x) \ DIV_ROUND_UP(((x) * MAX77387_MAX_FLASH_LEVEL), 1000) #define MAX77387_MAX_TORCH_CURRENT(x) \ DIV_ROUND_UP(((x) * MAX77387_MAX_TORCH_LEVEL), 1000) #define MAX77387_FLASH_TIMER_NUM (1 << 7) #define MAX77387_TORCH_TIMER_NUM (1 << 5) #define MAX77387_FTIMER_MASK (MAX77387_FLASH_TIMER_NUM - 1) #define MAX77387_TTIMER_MASK (MAX77387_TORCH_TIMER_NUM - 1) #define MAX77387_TX_MASK_ENABLE FIELD(1, 7) #define MAXFLASH_MODE_NONE 0 #define MAXFLASH_MODE_TORCH 1 #define MAXFLASH_MODE_FLASH 2 #define max77387_flash_cap_size \ (sizeof(struct nvc_torch_flash_capabilities_v1) \ + sizeof(struct nvc_torch_lumi_level_v1) \ * MAX77387_MAX_FLASH_LEVEL) #define max77387_flash_timeout_size \ (sizeof(struct nvc_torch_timer_capabilities_v1) \ + sizeof(struct nvc_torch_timeout_v1) \ * MAX77387_FLASH_TIMER_NUM) #define max77387_max_flash_cap_size (max77387_flash_cap_size * 2 \ + max77387_flash_timeout_size * 2) #define max77387_torch_cap_size \ (sizeof(struct nvc_torch_torch_capabilities_v1) \ + sizeof(struct nvc_torch_lumi_level_v1) \ * MAX77387_MAX_TORCH_LEVEL) #define max77387_torch_timeout_size \ (sizeof(struct nvc_torch_timer_capabilities_v1) \ + sizeof(struct nvc_torch_timeout_v1) \ * MAX77387_TORCH_TIMER_NUM) #define max77387_max_torch_cap_size (max77387_torch_timeout_size * 2\ + max77387_torch_timeout_size * 2) #define GET_CURRENT_BY_INDEX(c) ((c) * 125 / 8) /* mul 15.625 mA */ #define GET_INDEX_BY_CURRENT(c) ((c) * 8 / 125) /* div by 15.625 mA */ struct max77387_caps_struct { u32 curr_step_uA; u32 max_peak_curr_mA; u32 max_torch_curr_mA; u32 max_total_current_mA; }; struct max77387_settings { u8 fled_trig; u8 tx1_mask; u8 tx2_mask; u8 flash_ramp; u8 torch_ramp; u8 max_flash1; u8 max_flash2; u8 ntc; u8 dcdc_cntl1; u8 dcdc_cntl2; u8 dcdc_lim; }; struct max77387_reg_cache { bool regs_stale; u8 led1_fcurr; u8 led2_fcurr; u8 led1_tcurr; u8 led2_tcurr; u8 leds_en; u8 tmask_led1; u8 tmask_led2; u8 framp; u8 tramp; u8 f_timer; u8 t_timer; }; struct max77387_info { struct i2c_client *i2c_client; struct miscdevice miscdev; struct device *dev; struct dentry *d_max77387; struct mutex mutex; struct max77387_power_rail pwr_rail; struct max77387_platform_data *pdata; struct nvc_torch_capability_query query; struct nvc_torch_flash_capabilities_v1 *flash_cap[2]; struct nvc_torch_timer_capabilities_v1 *flash_timeouts[2]; struct nvc_torch_torch_capabilities_v1 *torch_cap[2]; struct nvc_torch_timer_capabilities_v1 *torch_timeouts[2]; struct max77387_config config; struct max77387_reg_cache regs; struct max77387_settings settings; struct regmap *regmap; struct edp_client *edpc; unsigned edp_state; atomic_t in_use; int flash_cap_size; int torch_cap_size; int pwr_state; u16 chip_id; u8 op_mode; u8 power_is_on; u8 ftimer_mode; u8 ttimer_mode; u8 new_timer; char devname[16]; }; static const struct max77387_caps_struct max77387_caps = { .curr_step_uA = 15625, .max_peak_curr_mA = MAX77387_MAX_FLASH_CURRENT(15625), .max_torch_curr_mA = MAX77387_MAX_TORCH_CURRENT(3906), .max_total_current_mA = 1000 * 2 }; static struct nvc_torch_lumi_level_v1 max77387_def_flash_levels[MAX77387_FLASH_LEVELS]; static struct max77387_platform_data max77387_default_pdata = { .config = { .led_mask = 3, /* both LEDs enabled */ .synchronized_led = false, .flash_trigger_mode = 3, .torch_trigger_mode = 3, .flash_mode = 2, .torch_mode = 1, .adaptive_mode = 2, .tx1_mask_mA = 0, .tx2_mask_mA = 0, .flash_rampup_uS = 0, .flash_rampdn_uS = 0, .torch_rampup_uS = 0, .torch_rampdn_uS = 0, .max_peak_current_mA = 1000, .max_torch_current_mA = 250, .max_peak_duration_ms = 0, .max_flash_threshold_mV = 0, .led_config[0] = { .flash_torch_ratio = 10000, .granularity = 1000, .flash_levels = ARRAY_SIZE(max77387_def_flash_levels), .lumi_levels = max77387_def_flash_levels, }, .led_config[1] = { .flash_torch_ratio = 10000, .granularity = 1000, .flash_levels = ARRAY_SIZE(max77387_def_flash_levels), .lumi_levels = max77387_def_flash_levels, }, }, .cfg = 0, .num = 0, .sync = 0, .dev_name = "torch", .pinstate = {0x0000, 0x0000}, }; /* flash timer duration settings in uS */ static u32 max77387_flash_timer[MAX77387_FLASH_TIMER_NUM] = { 128, 384, 640, 896, 1410, 1920, 2430, 2940, }; /* torch timer duration settings in uS */ #define MAX77387_TORCH_TIMER_FOREVER 0xFFFFFFFF static u32 max77387_torch_timer[MAX77387_TORCH_TIMER_NUM + 1] = { 122880, }; static void max77387_throttle(unsigned int new_state, void *priv_data); static bool rd_wr_reg_chk(struct device *dev, unsigned int reg) { if (reg > MAX77387_RO_DCDC_MAX) { dev_err(dev, "%s: non-existing reg 0x%x\n", __func__, reg); return false; } return true; } static const struct regmap_config max77387_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = MAX77387_RO_DCDC_MAX, .writeable_reg = rd_wr_reg_chk, .readable_reg = rd_wr_reg_chk, .cache_type = REGCACHE_RBTREE, }; static inline int max77387_reg_raw_rd( struct max77387_info *info, u8 reg, u8 *val, u8 num) { int ret = -ENODEV; mutex_lock(&info->mutex); if (info->power_is_on) ret = regmap_raw_read(info->regmap, reg, val, num); else dev_err(info->dev, "%s: power is off.\n", __func__); mutex_unlock(&info->mutex); return ret; } static int max77387_reg_raw_wr( struct max77387_info *info, u8 reg, u8 *buf, u8 num) { int ret = -ENODEV; dev_dbg(info->dev, "%s %x = %x %x\n", __func__, reg, buf[0], buf[1]); mutex_lock(&info->mutex); if (info->power_is_on) ret = regmap_raw_write(info->regmap, reg, buf, num); else dev_err(info->dev, "%s: power is off.\n", __func__); mutex_unlock(&info->mutex); return ret; } static int max77387_reg_wr( struct max77387_info *info, u8 reg, u8 val, bool refresh) { int ret = -ENODEV; dev_dbg(info->dev, "%s: %02x - %02x, %s %s\n", __func__, reg, val, info->regs.regs_stale ? "STALE" : "NONE", refresh ? "REFRESH" : "NONE"); if (unlikely(!info->regs.regs_stale && !refresh)) return 0; mutex_lock(&info->mutex); if (info->power_is_on) ret = regmap_write(info->regmap, reg, val); else dev_err(info->dev, "%s: power is off.\n", __func__); mutex_unlock(&info->mutex); return ret; } static void max77387_edp_lowest(struct max77387_info *info) { if (!info->edpc) return; info->edp_state = info->edpc->num_states - 1; dev_dbg(info->dev, "%s %d\n", __func__, info->edp_state); if (edp_update_client_request(info->edpc, info->edp_state, NULL)) { dev_err(info->dev, "THIS IS NOT LIKELY HAPPEN!\n"); dev_err(info->dev, "UNABLE TO SET LOWEST EDP STATE!\n"); } } static void max77387_edp_register(struct max77387_info *info) { struct edp_manager *edp_manager; struct edp_client *edpc = &info->pdata->edpc_config; int ret; info->edpc = NULL; if (!edpc->num_states) { dev_notice(info->dev, "%s: NO edp states defined.\n", __func__); return; } strncpy(edpc->name, "max77387f", EDP_NAME_LEN - 1); edpc->name[EDP_NAME_LEN - 1] = 0; edpc->throttle = max77387_throttle; edpc->private_data = info; dev_dbg(info->dev, "%s: %s, e0 = %d, p %d\n", __func__, edpc->name, edpc->e0_index, edpc->priority); for (ret = 0; ret < edpc->num_states; ret++) dev_dbg(info->dev, "e%d = %d mA\n", ret - edpc->e0_index, edpc->states[ret]); edp_manager = edp_get_manager("battery"); if (!edp_manager) { dev_err(info->dev, "unable to get edp manager: battery\n"); return; } ret = edp_register_client(edp_manager, edpc); if (ret) { dev_err(info->dev, "unable to register edp client\n"); return; } info->edpc = edpc; /* set to lowest state at init */ max77387_edp_lowest(info); } static int max77387_edp_req(struct max77387_info *info, u8 mask, u8 *curr1, u8 *curr2) { unsigned *estates; unsigned total_curr = 0; unsigned curr_mA; unsigned approved; unsigned new_state; int ret = 0; if (!info->edpc) return 0; dev_dbg(info->dev, "%s: %d curr1 = %02x curr2 = %02x\n", __func__, mask, *curr1, *curr2); estates = info->edpc->states; if (mask & 1) total_curr += *curr1; if (mask & 2) total_curr += *curr2; curr_mA = GET_CURRENT_BY_INDEX(total_curr); for (new_state = info->edpc->num_states - 1; new_state > 0; new_state--) if (estates[new_state] >= curr_mA) break; dev_dbg(info->dev, "edp req: %d curr = %d mA\n", new_state, curr_mA); ret = edp_update_client_request(info->edpc, new_state, &approved); if (ret) { dev_err(info->dev, "E state transition failed\n"); return ret; } if (approved > new_state) { /* edp manager returned less current */ curr_mA = GET_INDEX_BY_CURRENT(estates[approved]); if (mask & 1) *curr1 = curr_mA * (*curr1) / total_curr; *curr2 = curr_mA - (*curr1); dev_dbg(info->dev, "new state: %d curr = %d mA (%d %d)\n", approved, curr_mA, *curr1, *curr2); } info->edp_state = approved; return 0; } static int max77387_set_leds(struct max77387_info *info, u8 mask, u8 curr1, u8 curr2) { struct max77387_settings *pst = &info->settings; u32 f_levels1 = info->flash_cap[0]->numberoflevels - 2; u32 f_levels2 = info->flash_cap[1]->numberoflevels - 2; u32 t_levels1 = info->torch_cap[0]->numberoflevels - 2; u32 t_levels2 = info->torch_cap[1]->numberoflevels - 2; int err = 0; u8 fled_en = 0; u8 regs[11]; memset(regs, 0, sizeof(regs)); if (info->op_mode == MAXFLASH_MODE_NONE) { err = max77387_reg_raw_wr( info, MAX77387_RW_FLASH_FLED1CURR, regs, 5); if (!err) { info->regs.led1_fcurr = 0; info->regs.led2_fcurr = 0; info->regs.led1_tcurr = 0; info->regs.led2_tcurr = 0; info->regs.leds_en = 0; info->regs.regs_stale = false; max77387_edp_lowest(info); } goto set_leds_end; } err = max77387_edp_req(info, mask, &curr1, &curr2); if (err) goto set_leds_end; if (mask & 1) { if (info->op_mode == MAXFLASH_MODE_FLASH) { if (curr1 > f_levels1) curr1 = f_levels1; fled_en |= (pst->fled_trig & FLASH_TRIG_MASK); regs[0] = FLASH_CURRENT(curr1); } else { if (curr1 > t_levels1) curr1 = t_levels1; fled_en |= (pst->fled_trig & TORCH_TRIG_MASK); regs[2] = TORCH_CURRENT(curr1); } } if (mask & 2) { if (info->op_mode == MAXFLASH_MODE_FLASH) { if (curr2 > f_levels2) curr2 = f_levels2; fled_en |= (pst->fled_trig & FLASH_TRIG_MASK); regs[1] = FLASH_CURRENT(curr2); } else { if (curr2 > t_levels2) curr2 = t_levels2; fled_en |= (pst->fled_trig & TORCH_TRIG_MASK); regs[3] = TORCH_CURRENT(curr2); } } /* if any led is set as flash, update the flash timer register */ if (info->op_mode == MAXFLASH_MODE_FLASH) regs[9] = (info->ftimer_mode & FIELD(TIMER_MAX, 7)) | FIELD((info->new_timer & MAX77387_FTIMER_MASK), 0); else regs[10] = (info->ttimer_mode & FIELD(TTIMER_DIS, 7)) | FIELD((info->new_timer & MAX77387_TTIMER_MASK), 2); regs[4] = fled_en; regs[5] = pst->tx1_mask; regs[6] = pst->tx2_mask; regs[7] = pst->flash_ramp; regs[8] = pst->torch_ramp; if ((info->regs.led1_fcurr != regs[0]) || (info->regs.led2_fcurr != regs[1]) || (info->regs.led1_tcurr != regs[2]) || (info->regs.led2_tcurr != regs[3]) || (info->regs.t_timer != regs[10]) || (info->regs.f_timer != regs[9]) || (info->regs.leds_en != regs[4])) info->regs.regs_stale = true; if (info->regs.regs_stale) { err = max77387_reg_raw_wr( info, MAX77387_RW_FLASH_FLED1CURR, regs, sizeof(regs)); if (!err) { info->regs.led1_fcurr = regs[0]; info->regs.led2_fcurr = regs[1]; info->regs.led1_tcurr = regs[2]; info->regs.led2_tcurr = regs[3]; info->regs.t_timer = regs[10]; info->regs.f_timer = regs[9]; info->regs.leds_en = regs[4]; info->regs.regs_stale = false; } } set_leds_end: if (err) dev_err(info->dev, "%s ERROR: %d\n", __func__, err); else dev_dbg(info->dev, "%s led %x f: %02x %02x %02x, t: %02x %02x %02x, %x\n", __func__, mask, curr1, curr2, info->regs.f_timer, info->regs.led1_tcurr, info->regs.led2_tcurr, info->regs.t_timer, fled_en); return err; } static void max77387_update_config(struct max77387_info *info) { struct max77387_settings *pst = &info->settings; struct max77387_config *pcfg = &info->config; struct max77387_config *pcfg_cust; int i; int delta; dev_dbg(info->dev, "%s +++\n", __func__); dev_dbg(info->dev, "max77387_def_flash_levels:\n"); for (i = 0; i < ARRAY_SIZE(max77387_def_flash_levels); i++) { max77387_def_flash_levels[i].guidenum = i; max77387_def_flash_levels[i].luminance = (i + 1) * max77387_caps.curr_step_uA; dev_dbg(info->dev, "0x%02x - %d\n", i, max77387_def_flash_levels[i].luminance); } dev_dbg(info->dev, "max77387_flash_timer:\n"); delta = 1024; for (i = 8; i < ARRAY_SIZE(max77387_flash_timer); i++) { max77387_flash_timer[i] = max77387_flash_timer[i - 1] + delta; if (i >= 0x3f) delta = 8192; else if (i >= 0x1f) delta = 4096; else if (i >= 0x0f) delta = 2048; dev_dbg(info->dev, "0x%02x - %06d\n", i, max77387_flash_timer[i]); } dev_dbg(info->dev, "max77387_torch_timer:\n"); delta = 131072; for (i = 1; i < ARRAY_SIZE(max77387_torch_timer) - 1; i++) { max77387_torch_timer[i] = max77387_torch_timer[i - 1] + delta; if (i >= 0x0f) delta = 1048576; else if (i >= 0x7) delta = 524288; else if (i >= 3) delta = 262144; dev_dbg(info->dev, "0x%02x - %08d\n", i, max77387_torch_timer[i]); } max77387_torch_timer[ARRAY_SIZE(max77387_torch_timer) - 1] = MAX77387_TORCH_TIMER_FOREVER; memcpy(pcfg, &max77387_default_pdata.config, sizeof(*pcfg)); if (!info->pdata) { info->pdata = &max77387_default_pdata; dev_dbg(info->dev, "%s No platform data. Using defaults.\n", __func__); goto update_end; } pcfg_cust = &info->pdata->config; if (pcfg_cust->flash_trigger_mode) pcfg->flash_trigger_mode = pcfg_cust->flash_trigger_mode; if (pcfg_cust->torch_trigger_mode) pcfg->torch_trigger_mode = pcfg_cust->torch_trigger_mode; if (pcfg_cust->led_mask) pcfg->led_mask = pcfg_cust->led_mask; if (pcfg_cust->synchronized_led) pcfg->synchronized_led = pcfg_cust->synchronized_led; if (pcfg_cust->flash_mode) pcfg->flash_mode = pcfg_cust->flash_mode; if (pcfg_cust->torch_mode) pcfg->torch_mode = pcfg_cust->torch_mode; if (pcfg_cust->adaptive_mode) pcfg->adaptive_mode = pcfg_cust->adaptive_mode; if (pcfg_cust->max_total_current_mA) pcfg->max_total_current_mA = pcfg_cust->max_total_current_mA; if (pcfg_cust->max_peak_current_mA) pcfg->max_peak_current_mA = pcfg_cust->max_peak_current_mA; if (pcfg_cust->max_peak_duration_ms) pcfg->max_peak_duration_ms = pcfg_cust->max_peak_duration_ms; if (pcfg_cust->max_torch_current_mA) pcfg->max_torch_current_mA = pcfg_cust->max_torch_current_mA; if (pcfg_cust->max_flash_threshold_mV) pcfg->max_flash_threshold_mV = pcfg_cust->max_flash_threshold_mV; if (pcfg_cust->max_flash_hysteresis_mV) pcfg->max_flash_hysteresis_mV = pcfg_cust->max_flash_hysteresis_mV; if (pcfg_cust->max_flash_lbdly_f_uS) pcfg->max_flash_lbdly_f_uS = pcfg_cust->max_flash_lbdly_f_uS; if (pcfg_cust->max_flash_lbdly_r_uS) pcfg->max_flash_lbdly_r_uS = pcfg_cust->max_flash_lbdly_r_uS; if (pcfg_cust->tx1_mask_mA) pcfg->tx1_mask_mA = pcfg_cust->tx1_mask_mA; if (pcfg_cust->tx2_mask_mA) pcfg->tx2_mask_mA = pcfg_cust->tx2_mask_mA; if (pcfg_cust->flash_rampup_uS) pcfg->flash_rampup_uS = pcfg_cust->flash_rampup_uS; if (pcfg_cust->flash_rampdn_uS) pcfg->flash_rampdn_uS = pcfg_cust->flash_rampdn_uS; if (pcfg_cust->torch_rampup_uS) pcfg->torch_rampup_uS = pcfg_cust->torch_rampup_uS; if (pcfg_cust->torch_rampdn_uS) pcfg->torch_rampdn_uS = pcfg_cust->torch_rampdn_uS; if (pcfg_cust->def_ftimer) pcfg->torch_rampdn_uS = pcfg_cust->def_ftimer; for (i = 0; i < MAX77387_LED_NUM; i++) { if (pcfg_cust->led_config[i].flash_levels && pcfg_cust->led_config[i].flash_torch_ratio && pcfg_cust->led_config[i].granularity && pcfg_cust->led_config[i].lumi_levels) memcpy(&pcfg->led_config[i], &pcfg_cust->led_config[i], sizeof(pcfg_cust->led_config[0])); else dev_notice(info->dev, "%s: invalid led config[%d].\n", __func__, i); } update_end: /* FLED enable settings */ /* How TORCH is triggered */ switch (pcfg->torch_trigger_mode) { case 1: /* triggered by FLASHEN */ pst->fled_trig = TORCH_TRIG_BY_FLASHEN; break; case 2: /* triggered by TORCHEN */ pst->fled_trig = TORCH_TRIG_BY_TORCHEN; break; case 3: /* triggered by serial interface */ pst->fled_trig = TORCH_TRIG_BY_I2C; break; case 4: /* triggered by FLASHEN and TORCHEN */ pst->fled_trig = TORCH_TRIG_BY_FANDT; break; case 5: /* triggered by FLASHEN or TORCHEN */ pst->fled_trig = TORCH_TRIG_BY_FORT; break; default: dev_err(info->dev, "%s: unrecognized torch trigger mode.\n", __func__); dev_err(info->dev, "use default i2c mode.\n"); pst->fled_trig = TORCH_TRIG_BY_I2C; break; } /* How FLASH is triggered */ switch (pcfg->flash_trigger_mode) { case 1: /* triggered by FLASHEN */ pst->fled_trig |= FLASH_TRIG_BY_FLASHEN; break; case 2: /* triggered by TORCHEN */ pst->fled_trig |= FLASH_TRIG_BY_TORCHEN; break; case 3: /* triggered by serial interface */ pst->fled_trig |= FLASH_TRIG_BY_I2C; break; case 4: /* triggered by FLASHEN and TORCHEN */ pst->fled_trig |= FLASH_TRIG_BY_FANDT; break; case 5: /* triggered by FLASHEN or TORCHEN */ pst->fled_trig |= FLASH_TRIG_BY_FORT; break; default: dev_err(info->dev, "%s: unrecognized flash trigger mode.\n", __func__); dev_err(info->dev, "use default i2c mode.\n"); pst->fled_trig |= FLASH_TRIG_BY_I2C; break; } info->ftimer_mode = (pcfg->flash_mode == 1) ? FIELD(TIMER_ONESHOT, 7) : FIELD(TIMER_MAX, 7); switch (pcfg->torch_mode) { case 1: info->ttimer_mode = FIELD(TTIMER_DIS, 7) | FIELD(TORCH_TIMER_SAFETY_DIS, 6); break; case 2: info->ttimer_mode = FIELD(TIMER_ONESHOT, 7); break; case 3: default: info->ttimer_mode = FIELD(TTIMER_DIS, 7); break; } if (pcfg->max_flash_threshold_mV) { if (pcfg->max_flash_threshold_mV < MAXFLASH_V_TH_FLOOR) pcfg->max_flash_threshold_mV = MAXFLASH_V_TH_FLOOR; else if (pcfg->max_flash_threshold_mV > MAXFLASH_V_TH_CEILING) pcfg->max_flash_threshold_mV = MAXFLASH_V_TH_CEILING; /* 0 - hysteresis disabled */ if (pcfg->max_flash_hysteresis_mV) { if (pcfg->max_flash_hysteresis_mV < MAXFLASH_VOLT_HYS_FLOOR) pcfg->max_flash_hysteresis_mV = MAXFLASH_VOLT_HYS_FLOOR; else if (pcfg->max_flash_hysteresis_mV > MAXFLASH_VOLT_HYS_CEILING) pcfg->max_flash_hysteresis_mV = MAXFLASH_VOLT_HYS_CEILING; } pst->max_flash1 = FIELD(MAXFLASH_ENABLE, 7) | ((pcfg->max_flash_threshold_mV - MAXFLASH_V_TH_FLOOR) / MAXFLASH_V_TH_STEP); pst->max_flash1 |= (pcfg->max_flash_hysteresis_mV + MAXFLASH_VOLT_HYS_STEP / 2) / MAXFLASH_VOLT_HYS_STEP; } if (pcfg->max_flash_lbdly_f_uS) pst->max_flash1 = FIELD(pcfg->max_flash_lbdly_f_uS / MAXFLASH_TIMER_STEP, 0); if (pcfg->max_flash_lbdly_r_uS) pst->max_flash1 |= FIELD(pcfg->max_flash_lbdly_r_uS / MAXFLASH_TIMER_STEP, 3); } static int max77387_update_settings(struct max77387_info *info) { struct max77387_settings *pst = &info->settings; int err = 0; u8 regs[8]; info->regs.regs_stale = true; regs[0] = pst->tx1_mask; regs[1] = pst->tx2_mask; regs[2] = pst->flash_ramp; regs[3] = pst->torch_ramp; regs[4] = info->regs.f_timer; regs[5] = info->regs.t_timer; regs[6] = pst->max_flash1; regs[7] = pst->max_flash2; err = max77387_reg_raw_wr( info, MAX77387_RW_TX1_MASK, regs, sizeof(regs)); regs[0] = pst->ntc; regs[1] = pst->dcdc_cntl1; regs[2] = pst->dcdc_cntl2; regs[3] = pst->dcdc_lim; err = max77387_reg_raw_wr(info, MAX77387_RW_NTC, regs, 5); if (info->op_mode == MAXFLASH_MODE_FLASH) err |= max77387_set_leds(info, info->config.led_mask, info->regs.led1_fcurr, info->regs.led2_fcurr); else err |= max77387_set_leds(info, info->config.led_mask, info->regs.led1_tcurr, info->regs.led2_tcurr); info->regs.regs_stale = false; return err; } static int max77387_configure(struct max77387_info *info, bool update) { struct max77387_settings *pst = &info->settings; struct max77387_config *pcfg = &info->config; struct nvc_torch_capability_query *pqry = &info->query; struct nvc_torch_flash_capabilities_v1 *pfcap = NULL; struct nvc_torch_torch_capabilities_v1 *ptcap = NULL; struct nvc_torch_timer_capabilities_v1 *ptmcap = NULL; struct nvc_torch_lumi_level_v1 *plvls = NULL; int val, i, j; if (pcfg->max_peak_current_mA > max77387_caps.max_peak_curr_mA || !pcfg->max_peak_current_mA) { dev_notice(info->dev, "invalid max_peak_current_mA: %d,", pcfg->max_peak_current_mA); dev_notice(info->dev, " changed to %d\n", max77387_caps.max_peak_curr_mA); pcfg->max_peak_current_mA = max77387_caps.max_peak_curr_mA; } pst->tx1_mask = 0; if (pcfg->tx1_mask_mA) { if (pcfg->tx1_mask_mA > 1000) { dev_notice(info->dev, "%s: tx1_mask OUT OF RANGE. %d\n", __func__, pcfg->tx1_mask_mA); pcfg->tx1_mask_mA = 1000; } pst->tx1_mask = (u8)((u32)pcfg->tx1_mask_mA * 1000 / 15625) | MAX77387_TX_MASK_ENABLE; } pst->tx1_mask = 0; if (pcfg->tx2_mask_mA) { if (pcfg->tx2_mask_mA > 1000) { dev_notice(info->dev, "%s: tx2_mask OUT OF RANGE. %d\n", __func__, pcfg->tx2_mask_mA); pcfg->tx2_mask_mA = 1000; } pst->tx2_mask = (u8)((u32)pcfg->tx2_mask_mA * 1000 / 15625) | MAX77387_TX_MASK_ENABLE; } if (pcfg->flash_rampup_uS > 32896) { dev_notice(info->dev, "%s: flash ramp up OUT OF RANGE. %d\n", __func__, pcfg->flash_rampup_uS); pcfg->flash_rampup_uS = 32896; } if (pcfg->flash_rampdn_uS > 32896) { dev_notice(info->dev, "%s: flash ramp up OUT OF RANGE. %d\n", __func__, pcfg->flash_rampdn_uS); pcfg->flash_rampdn_uS = 32896; } pst->flash_ramp = ((pcfg->flash_rampup_uS / 384) << 4) | pcfg->flash_rampdn_uS / 384; if (pcfg->torch_rampup_uS > 32896) { dev_notice(info->dev, "%s: torch ramp up OUT OF RANGE. %d\n", __func__, pcfg->torch_rampup_uS); pcfg->torch_rampup_uS = 32896; } if (pcfg->torch_rampdn_uS > 32896) { dev_notice(info->dev, "%s: torch ramp up OUT OF RANGE. %d\n", __func__, pcfg->torch_rampdn_uS); pcfg->torch_rampdn_uS = 32896; } pst->torch_ramp = ((pcfg->torch_rampup_uS / 384) << 4) | pcfg->torch_rampdn_uS / 384; /* number of leds enabled */ i = 1; /* in synchronize mode, both leds are considered as 1 */ if (!pcfg->synchronized_led && (info->config.led_mask & 3) == 3) i = 2; pqry->flash_num = i; pqry->torch_num = i; val = pcfg->max_peak_current_mA * i; if (val > max77387_caps.max_total_current_mA) val = max77387_caps.max_total_current_mA; if (!pcfg->max_total_current_mA || pcfg->max_total_current_mA > val) pcfg->max_total_current_mA = val; pcfg->max_peak_current_mA = pcfg->max_total_current_mA / i; if (pcfg->max_torch_current_mA > max77387_caps.max_torch_curr_mA || !pcfg->max_torch_current_mA) { dev_notice(info->dev, "invalid max_torch_current_mA: %d,", pcfg->max_torch_current_mA); dev_notice(info->dev, " changed to %d\n", max77387_caps.max_torch_curr_mA); pcfg->max_torch_current_mA = max77387_caps.max_torch_curr_mA; } pqry->version = NVC_TORCH_CAPABILITY_VER_1; pqry->led_attr = 0; for (i = 0; i < pqry->flash_num; i++) { pfcap = info->flash_cap[i]; pfcap->version = NVC_TORCH_CAPABILITY_VER_1; pfcap->led_idx = i; pfcap->attribute = 0; pfcap->numberoflevels = pcfg->led_config[i].flash_levels + 1; pfcap->granularity = pcfg->led_config[i].granularity; pfcap->timeout_num = ARRAY_SIZE(max77387_flash_timer); ptmcap = info->flash_timeouts[i]; pfcap->timeout_off = (void *)ptmcap - (void *)pfcap; pfcap->flash_torch_ratio = pcfg->led_config[i].flash_torch_ratio; dev_dbg(info->dev, "%s flash#%d, attr: %x, levels: %d, g: %d, ratio: %d\n", __func__, pfcap->led_idx, pfcap->attribute, pfcap->numberoflevels, pfcap->granularity, pfcap->flash_torch_ratio); plvls = pcfg->led_config[i].lumi_levels; pfcap->levels[0].guidenum = MAX77387_LEVEL_OFF; pfcap->levels[0].luminance = 0; for (j = 1; j < pfcap->numberoflevels; j++) { pfcap->levels[j].guidenum = plvls[j - 1].guidenum; pfcap->levels[j].luminance = plvls[j - 1].luminance; dev_dbg(info->dev, "%02d - %d\n", pfcap->levels[j].guidenum, pfcap->levels[j].luminance); } ptmcap->timeout_num = pfcap->timeout_num; for (j = 0; j < ptmcap->timeout_num; j++) { ptmcap->timeouts[j].timeout = max77387_flash_timer[j]; dev_dbg(info->dev, "t: %02d - %d uS\n", j, ptmcap->timeouts[j].timeout); } } for (i = 0; i < pqry->torch_num; i++) { ptcap = info->torch_cap[i]; ptcap->version = NVC_TORCH_CAPABILITY_VER_1; ptcap->led_idx = i; ptcap->attribute = 0; ptcap->numberoflevels = pcfg->led_config[i].flash_levels + 1; ptcap->granularity = pcfg->led_config[i].granularity; ptcap->timeout_num = ARRAY_SIZE(max77387_torch_timer); ptmcap = info->torch_timeouts[i]; ptcap->timeout_off = (void *)ptmcap - (void *)ptcap; dev_dbg(info->dev, "torch#%d, attr: %x, levels: %d, g: %d\n", ptcap->led_idx, ptcap->attribute, ptcap->numberoflevels, ptcap->granularity); plvls = pcfg->led_config[i].lumi_levels; ptcap->levels[0].guidenum = MAX77387_LEVEL_OFF; ptcap->levels[0].luminance = 0; for (j = 1; j < ptcap->numberoflevels; j++) { ptcap->levels[j].guidenum = plvls[j - 1].guidenum; ptcap->levels[j].luminance = plvls[j - 1].luminance; dev_dbg(info->dev, "%02d - %d\n", ptcap->levels[j].guidenum, ptcap->levels[j].luminance); } ptmcap->timeout_num = ptcap->timeout_num; for (j = 0; j < ptmcap->timeout_num; j++) { ptmcap->timeouts[j].timeout = max77387_torch_timer[j]; dev_dbg(info->dev, "t: %02d - %d uS\n", j, ptmcap->timeouts[j].timeout); } } if (update && (info->pwr_state == NVC_PWR_COMM || info->pwr_state == NVC_PWR_ON)) return max77387_update_settings(info); return 0; } static int max77387_strobe(struct max77387_info *info, int t_on) { u32 gpio = info->pdata->gpio_strobe & 0xffff; u32 lact = (info->pdata->gpio_strobe & 0xffff0000) ? 1 : 0; return gpio_direction_output(gpio, lact ^ (t_on & 1)); } static int max77387_enter_offmode(struct max77387_info *info, bool op_off) { int err = 0; if (op_off) { if (info->power_is_on) { info->op_mode = MAXFLASH_MODE_NONE; err = max77387_set_leds(info, 3, 0, 0); } } else { err = max77387_reg_wr( info, MAX77387_RW_FLED_MODE, 0, true); } return err; } static void max77387_throttle(unsigned int new_state, void *priv_data) { struct max77387_info *info = priv_data; if (!info) return; max77387_enter_offmode(info, true); } #ifdef CONFIG_PM static int max77387_suspend(struct i2c_client *client, pm_message_t msg) { struct max77387_info *info = i2c_get_clientdata(client); dev_info(info->dev, "Suspending\n"); info->regs.regs_stale = true; return 0; } static int max77387_resume(struct i2c_client *client) { struct max77387_info *info = i2c_get_clientdata(client); dev_info(info->dev, "Resuming\n"); info->regs.regs_stale = true; return 0; } static void max77387_shutdown(struct i2c_client *client) { struct max77387_info *info = i2c_get_clientdata(client); dev_info(info->dev, "Shutting down\n"); max77387_enter_offmode(info, true); info->regs.regs_stale = true; } #endif static int max77387_power_off(struct max77387_info *info) { struct max77387_power_rail *pw = &info->pwr_rail; int err = 0; if (!info->power_is_on) return 0; mutex_lock(&info->mutex); if (info->pdata && info->pdata->poweroff_callback) err = info->pdata->poweroff_callback(pw); if (IS_ERR_VALUE(err)) { mutex_unlock(&info->mutex); return err; } /* the call back function already handles the power off sequence */ if (err) err = 0; else { if (pw->vin) regulator_disable(pw->vin); if (pw->vdd) regulator_disable(pw->vdd); info->power_is_on = 0; } mutex_unlock(&info->mutex); max77387_edp_lowest(info); return err; } static int max77387_power_on(struct max77387_info *info) { struct max77387_power_rail *pw = &info->pwr_rail; int err = 0; if (info->power_is_on) return 0; mutex_lock(&info->mutex); if (info->pdata && info->pdata->poweron_callback) err = info->pdata->poweron_callback(pw); if (IS_ERR_VALUE(err)) goto max77387_poweron_callback_fail; /* the call back function already handles the power on sequence */ if (err) err = 0; else { if (pw->vdd) { err = regulator_enable(pw->vdd); if (err) { dev_err(info->dev, "%s vdd err\n", __func__); goto max77387_poweron_vdd_fail; } } if (pw->vin) { err = regulator_enable(pw->vin); if (err) { dev_err(info->dev, "%s vin err\n", __func__); goto max77387_poweron_vin_fail; } } } info->power_is_on = 1; mutex_unlock(&info->mutex); err = max77387_update_settings(info); if (err) { max77387_power_off(info); return err; } max77387_edp_lowest(info); return 0; max77387_poweron_vin_fail: if (pw->vdd) regulator_disable(pw->vdd); max77387_poweron_vdd_fail: if (info->pdata && info->pdata->poweroff_callback) info->pdata->poweroff_callback(pw); max77387_poweron_callback_fail: mutex_unlock(&info->mutex); return err; } static int max77387_power_set(struct max77387_info *info, int pwr) { int err = 0; if (pwr == info->pwr_state) return 0; switch (pwr) { case NVC_PWR_OFF: max77387_enter_offmode(info, true); if ((info->pdata->cfg & NVC_CFG_OFF2STDBY) || (info->pdata->cfg & NVC_CFG_BOOT_INIT)) pwr = NVC_PWR_STDBY; else err = max77387_power_off(info); break; case NVC_PWR_STDBY_OFF: if ((info->pdata->cfg & NVC_CFG_OFF2STDBY) || (info->pdata->cfg & NVC_CFG_BOOT_INIT)) pwr = NVC_PWR_STDBY; else err = max77387_power_on(info); break; case NVC_PWR_STDBY: err = max77387_power_on(info); err |= max77387_enter_offmode(info, false); break; case NVC_PWR_COMM: case NVC_PWR_ON: err = max77387_power_on(info); break; default: err = -EINVAL; break; } if (err < 0) { dev_err(info->dev, "%s error\n", __func__); pwr = NVC_PWR_ERR; } info->pwr_state = pwr; if (err > 0) return 0; return err; } static inline int max77387_power_user_set( struct max77387_info *info, int pwr) { int err = 0; if (!pwr || (pwr > NVC_PWR_ON)) return 0; err = max77387_power_set(info, pwr); if (info->pdata->cfg & NVC_CFG_NOERR) return 0; return err; } static int max77387_dev_id(struct max77387_info *info) { int err = 0; if (info->chip_id) return 0; err = max77387_power_on(info); if (err) return err; err = max77387_reg_raw_rd(info, MAX77387_RO_CHIPID1, (u8 *)&info->chip_id, sizeof(info->chip_id)); if (!err) dev_info(info->dev, "%s: 0x%x detected.\n", __func__, info->chip_id); else dev_dbg(info->dev, "%s: not detected.\n", __func__); err = max77387_power_off(info); return err; } static int max77387_get_param(struct max77387_info *info, long arg) { struct nvc_param params; struct nvc_torch_pin_state pinstate; const void *data_ptr = NULL; u32 data_size = 0; int err = 0; u8 reg; if (copy_from_user(¶ms, (const void __user *)arg, sizeof(struct nvc_param))) { dev_err(info->dev, "%s %d copy_from_user err\n", __func__, __LINE__); return -EINVAL; } switch (params.param) { case NVC_PARAM_TORCH_QUERY: dev_dbg(info->dev, "%s QUERY\n", __func__); data_ptr = &info->query; data_size = sizeof(info->query); break; case NVC_PARAM_FLASH_EXT_CAPS: dev_dbg(info->dev, "%s EXT_FLASH_CAPS %d\n", __func__, params.variant); if (params.variant >= info->query.flash_num) { dev_err(info->dev, "%s unsupported flash index.\n", __func__); err = -EINVAL; break; } data_ptr = info->flash_cap[params.variant]; data_size = info->flash_cap_size; break; case NVC_PARAM_TORCH_EXT_CAPS: dev_dbg(info->dev, "%s EXT_TORCH_CAPS %d\n", __func__, params.variant); if (params.variant >= info->query.torch_num) { dev_err(info->dev, "%s unsupported torch index.\n", __func__); err = -EINVAL; break; } data_ptr = info->torch_cap[params.variant]; data_size = info->torch_cap_size; break; case NVC_PARAM_FLASH_LEVEL: if (params.variant >= info->query.flash_num) { dev_err(info->dev, "%s unsupported flash index.\n", __func__); err = -EINVAL; break; } if (params.variant > 0) reg = info->regs.led2_fcurr; else reg = info->regs.led1_fcurr; data_ptr = ® data_size = sizeof(reg); dev_dbg(info->dev, "%s FLASH_LEVEL %d\n", __func__, reg); break; case NVC_PARAM_TORCH_LEVEL: reg = info->regs.led1_tcurr; if (params.variant >= info->query.torch_num) { dev_err(info->dev, "%s unsupported torch index.\n", __func__); err = -EINVAL; break; } if (params.variant > 0) reg >>= 4; else reg &= 0x0F; data_ptr = ® data_size = sizeof(reg); dev_dbg(info->dev, "%s TORCH_LEVEL %d\n", __func__, reg); break; case NVC_PARAM_FLASH_PIN_STATE: pinstate = info->pdata->pinstate; if (info->op_mode != MAXFLASH_MODE_FLASH) pinstate.values ^= 0xffff; pinstate.values &= pinstate.mask; dev_dbg(info->dev, "%s FLASH_PIN_STATE: %x & %x\n", __func__, pinstate.mask, pinstate.values); data_ptr = &pinstate; data_size = sizeof(pinstate); break; default: dev_err(info->dev, "%s unsupported parameter: %d\n", __func__, params.param); err = -EINVAL; } dev_dbg(info->dev, "%s data size user %d vs local %d\n", __func__, params.sizeofvalue, data_size); if (!err && params.sizeofvalue < data_size) { dev_err(info->dev, "%s data size mismatch\n", __func__); err = -EINVAL; } if (!err && copy_to_user((void __user *)params.p_value, data_ptr, data_size)) { dev_err(info->dev, "%s copy_to_user err line %d\n", __func__, __LINE__); err = -EFAULT; } return err; } static int max77387_get_levels(struct max77387_info *info, struct nvc_param *params, bool flash_mode, struct nvc_torch_set_level_v1 *plevels) { struct nvc_torch_timer_capabilities_v1 *p_tm; u8 op_mode; if (copy_from_user(plevels, (const void __user *)params->p_value, sizeof(*plevels))) { dev_err(info->dev, "%s %d copy_from_user err\n", __func__, __LINE__); return -EINVAL; } if (flash_mode) { dev_dbg(info->dev, "%s FLASH_LEVEL: %d %d %d\n", __func__, plevels->ledmask, plevels->levels[0], plevels->levels[1]); p_tm = info->flash_timeouts[0]; op_mode = MAXFLASH_MODE_FLASH; } else { dev_dbg(info->dev, "%s TORCH_LEVEL: %d %d %d\n", __func__, plevels->ledmask, plevels->levels[0], plevels->levels[1]); p_tm = info->torch_timeouts[0]; op_mode = MAXFLASH_MODE_TORCH; } if (plevels->timeout) { u16 i; for (i = 0; i < p_tm->timeout_num; i++) { plevels->timeout = i; if (plevels->timeout == p_tm->timeouts[i].timeout) break; } } else plevels->timeout = p_tm->timeout_num - 1; if (plevels->levels[0] == MAX77387_LEVEL_OFF) plevels->ledmask &= ~1; if (plevels->levels[1] == MAX77387_LEVEL_OFF) plevels->ledmask &= ~2; plevels->ledmask &= info->config.led_mask; if (!plevels->ledmask) info->op_mode = MAXFLASH_MODE_NONE; else { info->op_mode = op_mode; if (info->config.synchronized_led) { plevels->ledmask = 3; plevels->levels[1] = plevels->levels[0]; } } dev_dbg(info->dev, "Return: %d - %d %d %d\n", info->op_mode, plevels->ledmask, plevels->levels[0], plevels->levels[1]); return 0; } static int max77387_set_param(struct max77387_info *info, long arg) { struct nvc_param params; struct nvc_torch_set_level_v1 led_levels; u8 curr1; u8 curr2; u8 val; int err = 0; if (copy_from_user( ¶ms, (const void __user *)arg, sizeof(struct nvc_param))) { dev_err(info->dev, "%s %d copy_from_user err\n", __func__, __LINE__); return -EINVAL; } switch (params.param) { case NVC_PARAM_FLASH_LEVEL: max77387_get_levels(info, ¶ms, true, &led_levels); if (led_levels.timeout == 0) info->new_timer = info->config.def_ftimer; else info->new_timer = led_levels.timeout; curr1 = led_levels.levels[0]; curr2 = led_levels.levels[1]; err = max77387_set_leds(info, led_levels.ledmask, curr1, curr2); break; case NVC_PARAM_TORCH_LEVEL: max77387_get_levels(info, ¶ms, false, &led_levels); info->new_timer = led_levels.timeout; curr1 = led_levels.levels[0]; curr2 = led_levels.levels[1]; err = max77387_set_leds(info, led_levels.ledmask, curr1, curr2); break; case NVC_PARAM_FLASH_PIN_STATE: if (copy_from_user(&val, (const void __user *)params.p_value, sizeof(val))) { dev_err(info->dev, "%s %d copy_from_user err\n", __func__, __LINE__); err = -EINVAL; break; } dev_dbg(info->dev, "%s FLASH_PIN_STATE: %d\n", __func__, val); err = max77387_strobe(info, val); break; default: dev_err(info->dev, "%s unsupported parameter: %d\n", __func__, params.param); err = -EINVAL; break; } return err; } static long max77387_ioctl( struct file *file, unsigned int cmd, unsigned long arg) { struct max77387_info *info = file->private_data; int pwr; int err = 0; switch (cmd) { case NVC_IOCTL_PARAM_WR: err = max77387_set_param(info, arg); break; case NVC_IOCTL_PARAM_RD: err = max77387_get_param(info, arg); break; case NVC_IOCTL_PWR_WR: /* This is a Guaranteed Level of Service (GLOS) call */ pwr = (int)arg * 2; dev_dbg(info->dev, "%s PWR_WR: %d\n", __func__, pwr); err = max77387_power_user_set(info, pwr); break; case NVC_IOCTL_PWR_RD: pwr = info->pwr_state / 2; dev_dbg(info->dev, "%s PWR_RD: %d\n", __func__, pwr); if (copy_to_user( (void __user *)arg, (const void *)&pwr, sizeof(pwr))) { dev_err(info->dev, "%s copy_to_user err line %d\n", __func__, __LINE__); err = -EFAULT; } break; default: dev_err(info->dev, "%s unsupported ioctl: %x\n", __func__, cmd); err = -EINVAL; break; } return err; } static int max77387_open(struct inode *inode, struct file *file) { struct miscdevice *miscdev = file->private_data; struct max77387_info *info; info = container_of(miscdev, struct max77387_info, miscdev); if (!info) return -ENODEV; if (atomic_xchg(&info->in_use, 1)) return -EBUSY; file->private_data = info; dev_dbg(info->dev, "%s\n", __func__); return 0; } static int max77387_release(struct inode *inode, struct file *file) { struct max77387_info *info = file->private_data; dev_dbg(info->dev, "%s\n", __func__); max77387_power_set(info, NVC_PWR_OFF); file->private_data = NULL; WARN_ON(!atomic_xchg(&info->in_use, 0)); return 0; } static int max77387_power_put(struct max77387_power_rail *pw) { if (likely(pw->vin)) regulator_put(pw->vin); if (likely(pw->vdd)) regulator_put(pw->vdd); pw->vin = NULL; pw->vdd = NULL; return 0; } static int max77387_regulator_get(struct max77387_info *info, struct regulator **vreg, char vreg_name[]) { struct regulator *reg = NULL; int err = 0; reg = regulator_get(info->dev, vreg_name); if (unlikely(IS_ERR_OR_NULL(reg))) { dev_err(info->dev, "%s %s ERR: %d\n", __func__, vreg_name, (int)reg); err = PTR_ERR(reg); reg = NULL; } else dev_dbg(info->dev, "%s: %s\n", __func__, vreg_name); *vreg = reg; return err; } static int max77387_power_get(struct max77387_info *info) { struct max77387_power_rail *pw = &info->pwr_rail; int err; err = max77387_regulator_get(info, &pw->vin, "vin"); /* 3.3v */ err |= max77387_regulator_get(info, &pw->vdd, "vdd"); /* 1.8v */ info->pwr_state = NVC_PWR_OFF; return err; }; static const struct file_operations max77387_fileops = { .owner = THIS_MODULE, .open = max77387_open, .unlocked_ioctl = max77387_ioctl, .release = max77387_release, }; static void max77387_del(struct max77387_info *info) { max77387_power_set(info, NVC_PWR_OFF); max77387_power_put(&info->pwr_rail); } static int max77387_remove(struct i2c_client *client) { struct max77387_info *info = i2c_get_clientdata(client); dev_dbg(info->dev, "%s\n", __func__); misc_deregister(&info->miscdev); max77387_del(info); if (info->d_max77387) debugfs_remove_recursive(info->d_max77387); return 0; } static int max77387_debugfs_init(struct max77387_info *info); static void max77387_caps_layout(struct max77387_info *info) { #define MAX77387_FLASH_CAP_TIMEOUT_SIZE \ (max77387_flash_cap_size + max77387_flash_timeout_size) #define MAX77387_TORCH_CAP_TIMEOUT_SIZE \ (max77387_torch_cap_size + max77387_torch_timeout_size) void *start_ptr = (void *)info + sizeof(*info); info->flash_cap[0] = start_ptr; info->flash_timeouts[0] = start_ptr + max77387_flash_cap_size; start_ptr += MAX77387_FLASH_CAP_TIMEOUT_SIZE; info->flash_cap[1] = start_ptr; info->flash_timeouts[1] = start_ptr + max77387_flash_cap_size; info->flash_cap_size = MAX77387_FLASH_CAP_TIMEOUT_SIZE; start_ptr += MAX77387_FLASH_CAP_TIMEOUT_SIZE; info->torch_cap[0] = start_ptr; info->torch_timeouts[0] = start_ptr + max77387_torch_cap_size; start_ptr += MAX77387_TORCH_CAP_TIMEOUT_SIZE; info->torch_cap[1] = start_ptr; info->torch_timeouts[1] = start_ptr + max77387_torch_cap_size; info->torch_cap_size = MAX77387_TORCH_CAP_TIMEOUT_SIZE; dev_dbg(info->dev, "%s: %d(%d + %d), %d(%d + %d)\n", __func__, info->flash_cap_size, max77387_flash_cap_size, max77387_flash_timeout_size, info->torch_cap_size, max77387_torch_cap_size, max77387_torch_timeout_size); } static int max77387_probe( struct i2c_client *client, const struct i2c_device_id *id) { struct max77387_info *info; dev_info(&client->dev, "%s\n", __func__); info = devm_kzalloc(&client->dev, sizeof(*info) + max77387_max_flash_cap_size + max77387_max_torch_cap_size, GFP_KERNEL); if (info == NULL) { dev_err(&client->dev, "%s: kzalloc error\n", __func__); return -ENOMEM; } info->regmap = devm_regmap_init_i2c(client, &max77387_regmap_config); if (IS_ERR(info->regmap)) { dev_err(&client->dev, "regmap init failed: %ld\n", PTR_ERR(info->regmap)); return -ENODEV; } info->i2c_client = client; info->dev = &client->dev; if (client->dev.platform_data) { info->pdata = client->dev.platform_data; dev_dbg(&client->dev, "pdata: %s\n", info->pdata->dev_name); } else dev_notice(&client->dev, "%s NO platform data\n", __func__); max77387_power_get(info); max77387_caps_layout(info); max77387_update_config(info); /* flash mode */ info->op_mode = MAXFLASH_MODE_NONE; max77387_configure(info, false); max77387_edp_register(info); i2c_set_clientdata(client, info); mutex_init(&info->mutex); max77387_dev_id(info); if ((info->pdata->cfg & NVC_CFG_NODEV) && ((info->chip_id & 0xff00) == 0x9100)) { max77387_del(info); return -ENODEV; } if (info->pdata->dev_name != NULL) strncpy(info->devname, info->pdata->dev_name, sizeof(info->devname) - 1); else strncpy(info->devname, "max77387", sizeof(info->devname) - 1); if (info->pdata->num) snprintf(info->devname, sizeof(info->devname), "%s.%u", info->devname, info->pdata->num); info->miscdev.name = info->devname; info->miscdev.fops = &max77387_fileops; info->miscdev.minor = MISC_DYNAMIC_MINOR; if (misc_register(&info->miscdev)) { dev_err(&client->dev, "%s unable to register misc device %s\n", __func__, info->devname); max77387_del(info); return -ENODEV; } max77387_debugfs_init(info); return 0; } static int max77387_status_show(struct seq_file *s, void *data) { struct max77387_info *info = s->private; dev_info(info->dev, "%s\n", __func__); seq_printf(s, "max77387 status:\n" " Power State = %01x\n" " Led Mask = %01x\n" " Led1 Current = 0x%02x\n" " Led2 Current = 0x%02x\n" " Output Mode = %s\n" " Led Settings = 0x%02x\n" " Flash TimeOut = 0x%02x\n" " Torch TimeOut = 0x%02x\n" " PinState Mask = 0x%04x\n" " PinState Values = 0x%04x\n" " Max_Peak_Current = %dmA\n" , info->pwr_state, info->config.led_mask, info->regs.led1_fcurr, info->regs.led2_fcurr, info->op_mode == MAXFLASH_MODE_FLASH ? "FLASH" : info->op_mode == MAXFLASH_MODE_TORCH ? "TORCH" : "NONE", info->settings.fled_trig, info->regs.f_timer, info->regs.t_timer, info->pdata->pinstate.mask, info->pdata->pinstate.values, info->config.max_peak_current_mA ); return 0; } static ssize_t max77387_attr_set(struct file *s, const char __user *user_buf, size_t count, loff_t *ppos) { struct max77387_info *info = ((struct seq_file *)s->private_data)->private; char buf[24]; int buf_size; u32 val = 0; dev_info(info->dev, "%s\n", __func__); if (!user_buf || count <= 1) return -EFAULT; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf + 1, "0x%x", &val) == 1) goto set_attr; if (sscanf(buf + 1, "0X%x", &val) == 1) goto set_attr; if (sscanf(buf + 1, "%d", &val) == 1) goto set_attr; dev_err(info->dev, "SYNTAX ERROR: %s\n", buf); return -EFAULT; set_attr: dev_info(info->dev, "new data = %x\n", val); switch (buf[0]) { /* enable/disable power */ case 'p': if (val) max77387_power_set(info, NVC_PWR_ON); else max77387_power_set(info, NVC_PWR_OFF); break; /* enable/disable led 1/2 */ case 'l': info->config.led_mask = val; max77387_configure(info, false); break; /* change led 1/2 current settings */ case 'c': max77387_set_leds(info, info->config.led_mask, val & 0xff, (val >> 8) & 0xff); break; /* modify flash timeout reg */ case 'f': info->new_timer = val; break; /* set led work mode/trigger mode */ case 'x': info->op_mode = (val & 0x300) >> 8; info->settings.fled_trig = val & 0xff; break; /* set max_peak_current_mA */ case 'k': if (val & 0xffff) info->config.max_peak_current_mA = val & 0xffff; max77387_configure(info, true); break; /* change pinstate setting */ case 'm': info->pdata->pinstate.mask = (val >> 16) & 0xffff; info->pdata->pinstate.values = val & 0xffff; break; /* trigger an external flash/torch event */ case 'g': info->pdata->gpio_strobe = val & 0xffff; max77387_strobe(info, (val >> 16) & 1); break; } return count; } static int max77387_debugfs_open(struct inode *inode, struct file *file) { return single_open(file, max77387_status_show, inode->i_private); } static const struct file_operations max77387_debugfs_fops = { .open = max77387_debugfs_open, .read = seq_read, .write = max77387_attr_set, .llseek = seq_lseek, .release = single_release, }; static int max77387_debugfs_init(struct max77387_info *info) { struct dentry *d; info->d_max77387 = debugfs_create_dir( info->miscdev.this_device->kobj.name, NULL); if (info->d_max77387 == NULL) { dev_err(info->dev, "%s: debugfs mk dir failed\n", __func__); return -ENOMEM; } d = debugfs_create_file("d", S_IRUGO|S_IWUSR, info->d_max77387, (void *)info, &max77387_debugfs_fops); if (!d) { dev_err(info->dev, "%s: debugfs mk file failed\n", __func__); debugfs_remove_recursive(info->d_max77387); info->d_max77387 = NULL; } return -EFAULT; } static const struct i2c_device_id max77387_id[] = { { "max77387", 0 }, { }, }; static struct i2c_driver max77387_drv = { .driver = { .name = "max77387", .owner = THIS_MODULE, }, .id_table = max77387_id, .probe = max77387_probe, .remove = max77387_remove, #ifdef CONFIG_PM .shutdown = max77387_shutdown, .suspend = max77387_suspend, .resume = max77387_resume, #endif }; module_i2c_driver(max77387_drv); MODULE_DESCRIPTION("MAXIM MAX77387 flash/torch driver"); MODULE_AUTHOR("Charlie Huang "); MODULE_LICENSE("GPL v2");