// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) ST-Ericsson SA 2010 * * Author: Srinidhi Kasagar * Author: Rabin Vincent * Author: Mattias Wallin */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Interrupt register offsets * Bank : 0x0E */ #define AB8500_IT_SOURCE1_REG 0x00 #define AB8500_IT_SOURCE2_REG 0x01 #define AB8500_IT_SOURCE3_REG 0x02 #define AB8500_IT_SOURCE4_REG 0x03 #define AB8500_IT_SOURCE5_REG 0x04 #define AB8500_IT_SOURCE6_REG 0x05 #define AB8500_IT_SOURCE7_REG 0x06 #define AB8500_IT_SOURCE8_REG 0x07 #define AB9540_IT_SOURCE13_REG 0x0C #define AB8500_IT_SOURCE19_REG 0x12 #define AB8500_IT_SOURCE20_REG 0x13 #define AB8500_IT_SOURCE21_REG 0x14 #define AB8500_IT_SOURCE22_REG 0x15 #define AB8500_IT_SOURCE23_REG 0x16 #define AB8500_IT_SOURCE24_REG 0x17 /* * latch registers */ #define AB8500_IT_LATCH1_REG 0x20 #define AB8500_IT_LATCH2_REG 0x21 #define AB8500_IT_LATCH3_REG 0x22 #define AB8500_IT_LATCH4_REG 0x23 #define AB8500_IT_LATCH5_REG 0x24 #define AB8500_IT_LATCH6_REG 0x25 #define AB8500_IT_LATCH7_REG 0x26 #define AB8500_IT_LATCH8_REG 0x27 #define AB8500_IT_LATCH9_REG 0x28 #define AB8500_IT_LATCH10_REG 0x29 #define AB8500_IT_LATCH12_REG 0x2B #define AB9540_IT_LATCH13_REG 0x2C #define AB8500_IT_LATCH19_REG 0x32 #define AB8500_IT_LATCH20_REG 0x33 #define AB8500_IT_LATCH21_REG 0x34 #define AB8500_IT_LATCH22_REG 0x35 #define AB8500_IT_LATCH23_REG 0x36 #define AB8500_IT_LATCH24_REG 0x37 /* * mask registers */ #define AB8500_IT_MASK1_REG 0x40 #define AB8500_IT_MASK2_REG 0x41 #define AB8500_IT_MASK3_REG 0x42 #define AB8500_IT_MASK4_REG 0x43 #define AB8500_IT_MASK5_REG 0x44 #define AB8500_IT_MASK6_REG 0x45 #define AB8500_IT_MASK7_REG 0x46 #define AB8500_IT_MASK8_REG 0x47 #define AB8500_IT_MASK9_REG 0x48 #define AB8500_IT_MASK10_REG 0x49 #define AB8500_IT_MASK11_REG 0x4A #define AB8500_IT_MASK12_REG 0x4B #define AB8500_IT_MASK13_REG 0x4C #define AB8500_IT_MASK14_REG 0x4D #define AB8500_IT_MASK15_REG 0x4E #define AB8500_IT_MASK16_REG 0x4F #define AB8500_IT_MASK17_REG 0x50 #define AB8500_IT_MASK18_REG 0x51 #define AB8500_IT_MASK19_REG 0x52 #define AB8500_IT_MASK20_REG 0x53 #define AB8500_IT_MASK21_REG 0x54 #define AB8500_IT_MASK22_REG 0x55 #define AB8500_IT_MASK23_REG 0x56 #define AB8500_IT_MASK24_REG 0x57 #define AB8500_IT_MASK25_REG 0x58 /* * latch hierarchy registers */ #define AB8500_IT_LATCHHIER1_REG 0x60 #define AB8500_IT_LATCHHIER2_REG 0x61 #define AB8500_IT_LATCHHIER3_REG 0x62 #define AB8540_IT_LATCHHIER4_REG 0x63 #define AB8500_IT_LATCHHIER_NUM 3 #define AB8540_IT_LATCHHIER_NUM 4 #define AB8500_REV_REG 0x80 #define AB8500_IC_NAME_REG 0x82 #define AB8500_SWITCH_OFF_STATUS 0x00 #define AB8500_TURN_ON_STATUS 0x00 #define AB8505_TURN_ON_STATUS_2 0x04 #define AB8500_CH_USBCH_STAT1_REG 0x02 #define VBUS_DET_DBNC100 0x02 #define VBUS_DET_DBNC1 0x01 static DEFINE_SPINLOCK(on_stat_lock); static u8 turn_on_stat_mask = 0xFF; static u8 turn_on_stat_set; static bool no_bm; /* No battery management */ /* * not really modular, but the easiest way to keep compat with existing * bootargs behaviour is to continue using module_param here. */ module_param(no_bm, bool, S_IRUGO); #define AB9540_MODEM_CTRL2_REG 0x23 #define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2) /* * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt * numbers are indexed into this array with (num / 8). The interupts are * defined in linux/mfd/ab8500.h * * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at * offset 0. */ /* AB8500 support */ static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = { 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, }; /* AB9540 / AB8505 support */ static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = { 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23 }; /* AB8540 support */ static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = { 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23, 25, 26, 27, 28, 29, 30, 31, }; static const char ab8500_version_str[][7] = { [AB8500_VERSION_AB8500] = "AB8500", [AB8500_VERSION_AB8505] = "AB8505", [AB8500_VERSION_AB9540] = "AB9540", [AB8500_VERSION_AB8540] = "AB8540", }; static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data) { int ret; ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); if (ret < 0) dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); return ret; } static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask, u8 data) { int ret; ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data, &mask, 1); if (ret < 0) dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); return ret; } static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr) { int ret; u8 data; ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); if (ret < 0) { dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); return ret; } return (int)data; } static int ab8500_get_chip_id(struct device *dev) { struct ab8500 *ab8500; if (!dev) return -EINVAL; ab8500 = dev_get_drvdata(dev->parent); return ab8500 ? (int)ab8500->chip_id : -EINVAL; } static int set_register_interruptible(struct ab8500 *ab8500, u8 bank, u8 reg, u8 data) { int ret; /* * Put the u8 bank and u8 register together into a an u16. * The bank on higher 8 bits and register in lower 8 bits. */ u16 addr = ((u16)bank) << 8 | reg; dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data); mutex_lock(&ab8500->lock); ret = ab8500->write(ab8500, addr, data); if (ret < 0) dev_err(ab8500->dev, "failed to write reg %#x: %d\n", addr, ret); mutex_unlock(&ab8500->lock); return ret; } static int ab8500_set_register(struct device *dev, u8 bank, u8 reg, u8 value) { int ret; struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); atomic_inc(&ab8500->transfer_ongoing); ret = set_register_interruptible(ab8500, bank, reg, value); atomic_dec(&ab8500->transfer_ongoing); return ret; } static int get_register_interruptible(struct ab8500 *ab8500, u8 bank, u8 reg, u8 *value) { int ret; u16 addr = ((u16)bank) << 8 | reg; mutex_lock(&ab8500->lock); ret = ab8500->read(ab8500, addr); if (ret < 0) dev_err(ab8500->dev, "failed to read reg %#x: %d\n", addr, ret); else *value = ret; mutex_unlock(&ab8500->lock); dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret); return (ret < 0) ? ret : 0; } static int ab8500_get_register(struct device *dev, u8 bank, u8 reg, u8 *value) { int ret; struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); atomic_inc(&ab8500->transfer_ongoing); ret = get_register_interruptible(ab8500, bank, reg, value); atomic_dec(&ab8500->transfer_ongoing); return ret; } static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank, u8 reg, u8 bitmask, u8 bitvalues) { int ret; u16 addr = ((u16)bank) << 8 | reg; mutex_lock(&ab8500->lock); if (ab8500->write_masked == NULL) { u8 data; ret = ab8500->read(ab8500, addr); if (ret < 0) { dev_err(ab8500->dev, "failed to read reg %#x: %d\n", addr, ret); goto out; } data = (u8)ret; data = (~bitmask & data) | (bitmask & bitvalues); ret = ab8500->write(ab8500, addr, data); if (ret < 0) dev_err(ab8500->dev, "failed to write reg %#x: %d\n", addr, ret); dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data); goto out; } ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues); if (ret < 0) dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr, ret); out: mutex_unlock(&ab8500->lock); return ret; } static int ab8500_mask_and_set_register(struct device *dev, u8 bank, u8 reg, u8 bitmask, u8 bitvalues) { int ret; struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); atomic_inc(&ab8500->transfer_ongoing); ret = mask_and_set_register_interruptible(ab8500, bank, reg, bitmask, bitvalues); atomic_dec(&ab8500->transfer_ongoing); return ret; } static struct abx500_ops ab8500_ops = { .get_chip_id = ab8500_get_chip_id, .get_register = ab8500_get_register, .set_register = ab8500_set_register, .get_register_page = NULL, .set_register_page = NULL, .mask_and_set_register = ab8500_mask_and_set_register, .event_registers_startup_state_get = NULL, .startup_irq_enabled = NULL, .dump_all_banks = ab8500_dump_all_banks, }; static void ab8500_irq_lock(struct irq_data *data) { struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); mutex_lock(&ab8500->irq_lock); atomic_inc(&ab8500->transfer_ongoing); } static void ab8500_irq_sync_unlock(struct irq_data *data) { struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); int i; for (i = 0; i < ab8500->mask_size; i++) { u8 old = ab8500->oldmask[i]; u8 new = ab8500->mask[i]; int reg; if (new == old) continue; /* * Interrupt register 12 doesn't exist prior to AB8500 version * 2.0 */ if (ab8500->irq_reg_offset[i] == 11 && is_ab8500_1p1_or_earlier(ab8500)) continue; if (ab8500->irq_reg_offset[i] < 0) continue; ab8500->oldmask[i] = new; reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i]; set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new); } atomic_dec(&ab8500->transfer_ongoing); mutex_unlock(&ab8500->irq_lock); } static void ab8500_irq_mask(struct irq_data *data) { struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); int offset = data->hwirq; int index = offset / 8; int mask = 1 << (offset % 8); ab8500->mask[index] |= mask; /* The AB8500 GPIOs have two interrupts each (rising & falling). */ if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R) ab8500->mask[index + 2] |= mask; if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R) ab8500->mask[index + 1] |= mask; if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R) /* Here the falling IRQ is one bit lower */ ab8500->mask[index] |= (mask << 1); } static void ab8500_irq_unmask(struct irq_data *data) { struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); unsigned int type = irqd_get_trigger_type(data); int offset = data->hwirq; int index = offset / 8; int mask = 1 << (offset % 8); if (type & IRQ_TYPE_EDGE_RISING) ab8500->mask[index] &= ~mask; /* The AB8500 GPIOs have two interrupts each (rising & falling). */ if (type & IRQ_TYPE_EDGE_FALLING) { if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R) ab8500->mask[index + 2] &= ~mask; else if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R) ab8500->mask[index + 1] &= ~mask; else if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R) /* Here the falling IRQ is one bit lower */ ab8500->mask[index] &= ~(mask << 1); else ab8500->mask[index] &= ~mask; } else { /* Satisfies the case where type is not set. */ ab8500->mask[index] &= ~mask; } } static int ab8500_irq_set_type(struct irq_data *data, unsigned int type) { return 0; } static struct irq_chip ab8500_irq_chip = { .name = "ab8500", .irq_bus_lock = ab8500_irq_lock, .irq_bus_sync_unlock = ab8500_irq_sync_unlock, .irq_mask = ab8500_irq_mask, .irq_disable = ab8500_irq_mask, .irq_unmask = ab8500_irq_unmask, .irq_set_type = ab8500_irq_set_type, }; static void update_latch_offset(u8 *offset, int i) { /* Fix inconsistent ITFromLatch25 bit mapping... */ if (unlikely(*offset == 17)) *offset = 24; /* Fix inconsistent ab8540 bit mapping... */ if (unlikely(*offset == 16)) *offset = 25; if ((i == 3) && (*offset >= 24)) *offset += 2; } static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500, int latch_offset, u8 latch_val) { int int_bit, line, i; for (i = 0; i < ab8500->mask_size; i++) if (ab8500->irq_reg_offset[i] == latch_offset) break; if (i >= ab8500->mask_size) { dev_err(ab8500->dev, "Register offset 0x%2x not declared\n", latch_offset); return -ENXIO; } /* ignore masked out interrupts */ latch_val &= ~ab8500->mask[i]; while (latch_val) { int_bit = __ffs(latch_val); line = (i << 3) + int_bit; latch_val &= ~(1 << int_bit); /* * This handles the falling edge hwirqs from the GPIO * lines. Route them back to the line registered for the * rising IRQ, as this is merely a flag for the same IRQ * in linux terms. */ if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F) line -= 16; if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F) line -= 8; if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F) line += 1; handle_nested_irq(irq_create_mapping(ab8500->domain, line)); } return 0; } static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500, int hier_offset, u8 hier_val) { int latch_bit, status; u8 latch_offset, latch_val; do { latch_bit = __ffs(hier_val); latch_offset = (hier_offset << 3) + latch_bit; update_latch_offset(&latch_offset, hier_offset); status = get_register_interruptible(ab8500, AB8500_INTERRUPT, AB8500_IT_LATCH1_REG + latch_offset, &latch_val); if (status < 0 || latch_val == 0) goto discard; status = ab8500_handle_hierarchical_line(ab8500, latch_offset, latch_val); if (status < 0) return status; discard: hier_val &= ~(1 << latch_bit); } while (hier_val); return 0; } static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev) { struct ab8500 *ab8500 = dev; u8 i; dev_vdbg(ab8500->dev, "interrupt\n"); /* Hierarchical interrupt version */ for (i = 0; i < (ab8500->it_latchhier_num); i++) { int status; u8 hier_val; status = get_register_interruptible(ab8500, AB8500_INTERRUPT, AB8500_IT_LATCHHIER1_REG + i, &hier_val); if (status < 0 || hier_val == 0) continue; status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val); if (status < 0) break; } return IRQ_HANDLED; } static int ab8500_irq_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hwirq) { struct ab8500 *ab8500 = d->host_data; if (!ab8500) return -EINVAL; irq_set_chip_data(virq, ab8500); irq_set_chip_and_handler(virq, &ab8500_irq_chip, handle_simple_irq); irq_set_nested_thread(virq, 1); irq_set_noprobe(virq); return 0; } static const struct irq_domain_ops ab8500_irq_ops = { .map = ab8500_irq_map, .xlate = irq_domain_xlate_twocell, }; static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np) { int num_irqs; if (is_ab8540(ab8500)) num_irqs = AB8540_NR_IRQS; else if (is_ab9540(ab8500)) num_irqs = AB9540_NR_IRQS; else if (is_ab8505(ab8500)) num_irqs = AB8505_NR_IRQS; else num_irqs = AB8500_NR_IRQS; /* If ->irq_base is zero this will give a linear mapping */ ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node, num_irqs, 0, &ab8500_irq_ops, ab8500); if (!ab8500->domain) { dev_err(ab8500->dev, "Failed to create irqdomain\n"); return -ENODEV; } return 0; } int ab8500_suspend(struct ab8500 *ab8500) { if (atomic_read(&ab8500->transfer_ongoing)) return -EINVAL; return 0; } static const struct mfd_cell ab8500_bm_devs[] = { OF_MFD_CELL("ab8500-charger", NULL, &ab8500_bm_data, sizeof(ab8500_bm_data), 0, "stericsson,ab8500-charger"), OF_MFD_CELL("ab8500-btemp", NULL, &ab8500_bm_data, sizeof(ab8500_bm_data), 0, "stericsson,ab8500-btemp"), OF_MFD_CELL("ab8500-fg", NULL, &ab8500_bm_data, sizeof(ab8500_bm_data), 0, "stericsson,ab8500-fg"), OF_MFD_CELL("ab8500-chargalg", NULL, &ab8500_bm_data, sizeof(ab8500_bm_data), 0, "stericsson,ab8500-chargalg"), }; static const struct mfd_cell ab8500_devs[] = { #ifdef CONFIG_DEBUG_FS OF_MFD_CELL("ab8500-debug", NULL, NULL, 0, 0, "stericsson,ab8500-debug"), #endif OF_MFD_CELL("ab8500-sysctrl", NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"), OF_MFD_CELL("ab8500-ext-regulator", NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"), OF_MFD_CELL("ab8500-regulator", NULL, NULL, 0, 0, "stericsson,ab8500-regulator"), OF_MFD_CELL("abx500-clk", NULL, NULL, 0, 0, "stericsson,abx500-clk"), OF_MFD_CELL("ab8500-gpadc", NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"), OF_MFD_CELL("ab8500-rtc", NULL, NULL, 0, 0, "stericsson,ab8500-rtc"), OF_MFD_CELL("ab8500-acc-det", NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"), OF_MFD_CELL("ab8500-poweron-key", NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"), OF_MFD_CELL("ab8500-pwm", NULL, NULL, 0, 1, "stericsson,ab8500-pwm"), OF_MFD_CELL("ab8500-pwm", NULL, NULL, 0, 2, "stericsson,ab8500-pwm"), OF_MFD_CELL("ab8500-pwm", NULL, NULL, 0, 3, "stericsson,ab8500-pwm"), OF_MFD_CELL("ab8500-denc", NULL, NULL, 0, 0, "stericsson,ab8500-denc"), OF_MFD_CELL("pinctrl-ab8500", NULL, NULL, 0, 0, "stericsson,ab8500-gpio"), OF_MFD_CELL("abx500-temp", NULL, NULL, 0, 0, "stericsson,abx500-temp"), OF_MFD_CELL("ab8500-usb", NULL, NULL, 0, 0, "stericsson,ab8500-usb"), OF_MFD_CELL("ab8500-codec", NULL, NULL, 0, 0, "stericsson,ab8500-codec"), }; static const struct mfd_cell ab9540_devs[] = { #ifdef CONFIG_DEBUG_FS { .name = "ab8500-debug", }, #endif { .name = "ab8500-sysctrl", }, { .name = "ab8500-ext-regulator", }, { .name = "ab8500-regulator", }, { .name = "abx500-clk", .of_compatible = "stericsson,abx500-clk", }, { .name = "ab8500-gpadc", .of_compatible = "stericsson,ab8500-gpadc", }, { .name = "ab8500-rtc", }, { .name = "ab8500-acc-det", }, { .name = "ab8500-poweron-key", }, { .name = "ab8500-pwm", .id = 1, }, { .name = "abx500-temp", }, { .name = "pinctrl-ab9540", .of_compatible = "stericsson,ab9540-gpio", }, { .name = "ab9540-usb", }, { .name = "ab9540-codec", }, { .name = "ab-iddet", }, }; /* Device list for ab8505 */ static const struct mfd_cell ab8505_devs[] = { #ifdef CONFIG_DEBUG_FS { .name = "ab8500-debug", }, #endif { .name = "ab8500-sysctrl", }, { .name = "ab8500-regulator", }, { .name = "abx500-clk", .of_compatible = "stericsson,abx500-clk", }, { .name = "ab8500-gpadc", .of_compatible = "stericsson,ab8500-gpadc", }, { .name = "ab8500-rtc", }, { .name = "ab8500-acc-det", }, { .name = "ab8500-poweron-key", }, { .name = "ab8500-pwm", .id = 1, }, { .name = "pinctrl-ab8505", }, { .name = "ab8500-usb", }, { .name = "ab8500-codec", }, { .name = "ab-iddet", }, }; static const struct mfd_cell ab8540_devs[] = { #ifdef CONFIG_DEBUG_FS { .name = "ab8500-debug", }, #endif { .name = "ab8500-sysctrl", }, { .name = "ab8500-ext-regulator", }, { .name = "ab8500-regulator", }, { .name = "abx500-clk", .of_compatible = "stericsson,abx500-clk", }, { .name = "ab8500-gpadc", .of_compatible = "stericsson,ab8500-gpadc", }, { .name = "ab8500-acc-det", }, { .name = "ab8500-poweron-key", }, { .name = "ab8500-pwm", .id = 1, }, { .name = "abx500-temp", }, { .name = "pinctrl-ab8540", }, { .name = "ab8540-usb", }, { .name = "ab8540-codec", }, { .name = "ab-iddet", }, }; static const struct mfd_cell ab8540_cut1_devs[] = { { .name = "ab8500-rtc", .of_compatible = "stericsson,ab8500-rtc", }, }; static const struct mfd_cell ab8540_cut2_devs[] = { { .name = "ab8540-rtc", .of_compatible = "stericsson,ab8540-rtc", }, }; static ssize_t show_chip_id(struct device *dev, struct device_attribute *attr, char *buf) { struct ab8500 *ab8500; ab8500 = dev_get_drvdata(dev); return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL); } /* * ab8500 has switched off due to (SWITCH_OFF_STATUS): * 0x01 Swoff bit programming * 0x02 Thermal protection activation * 0x04 Vbat lower then BattOk falling threshold * 0x08 Watchdog expired * 0x10 Non presence of 32kHz clock * 0x20 Battery level lower than power on reset threshold * 0x40 Power on key 1 pressed longer than 10 seconds * 0x80 DB8500 thermal shutdown */ static ssize_t show_switch_off_status(struct device *dev, struct device_attribute *attr, char *buf) { int ret; u8 value; struct ab8500 *ab8500; ab8500 = dev_get_drvdata(dev); ret = get_register_interruptible(ab8500, AB8500_RTC, AB8500_SWITCH_OFF_STATUS, &value); if (ret < 0) return ret; return sprintf(buf, "%#x\n", value); } /* use mask and set to override the register turn_on_stat value */ void ab8500_override_turn_on_stat(u8 mask, u8 set) { spin_lock(&on_stat_lock); turn_on_stat_mask = mask; turn_on_stat_set = set; spin_unlock(&on_stat_lock); } /* * ab8500 has turned on due to (TURN_ON_STATUS): * 0x01 PORnVbat * 0x02 PonKey1dbF * 0x04 PonKey2dbF * 0x08 RTCAlarm * 0x10 MainChDet * 0x20 VbusDet * 0x40 UsbIDDetect * 0x80 Reserved */ static ssize_t show_turn_on_status(struct device *dev, struct device_attribute *attr, char *buf) { int ret; u8 value; struct ab8500 *ab8500; ab8500 = dev_get_drvdata(dev); ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, AB8500_TURN_ON_STATUS, &value); if (ret < 0) return ret; /* * In L9540, turn_on_status register is not updated correctly if * the device is rebooted with AC/USB charger connected. Due to * this, the device boots android instead of entering into charge * only mode. Read the AC/USB status register to detect the charger * presence and update the turn on status manually. */ if (is_ab9540(ab8500)) { spin_lock(&on_stat_lock); value = (value & turn_on_stat_mask) | turn_on_stat_set; spin_unlock(&on_stat_lock); } return sprintf(buf, "%#x\n", value); } static ssize_t show_turn_on_status_2(struct device *dev, struct device_attribute *attr, char *buf) { int ret; u8 value; struct ab8500 *ab8500; ab8500 = dev_get_drvdata(dev); ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, AB8505_TURN_ON_STATUS_2, &value); if (ret < 0) return ret; return sprintf(buf, "%#x\n", (value & 0x1)); } static ssize_t show_ab9540_dbbrstn(struct device *dev, struct device_attribute *attr, char *buf) { struct ab8500 *ab8500; int ret; u8 value; ab8500 = dev_get_drvdata(dev); ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG, &value); if (ret < 0) return ret; return sprintf(buf, "%d\n", (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0); } static ssize_t store_ab9540_dbbrstn(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ab8500 *ab8500; int ret = count; int err; u8 bitvalues; ab8500 = dev_get_drvdata(dev); if (count > 0) { switch (buf[0]) { case '0': bitvalues = 0; break; case '1': bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT; break; default: goto exit; } err = mask_and_set_register_interruptible(ab8500, AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG, AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues); if (err) dev_info(ab8500->dev, "Failed to set DBBRSTN %c, err %#x\n", buf[0], err); } exit: return ret; } static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL); static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL); static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL); static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL); static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR, show_ab9540_dbbrstn, store_ab9540_dbbrstn); static struct attribute *ab8500_sysfs_entries[] = { &dev_attr_chip_id.attr, &dev_attr_switch_off_status.attr, &dev_attr_turn_on_status.attr, NULL, }; static struct attribute *ab8505_sysfs_entries[] = { &dev_attr_turn_on_status_2.attr, NULL, }; static struct attribute *ab9540_sysfs_entries[] = { &dev_attr_chip_id.attr, &dev_attr_switch_off_status.attr, &dev_attr_turn_on_status.attr, &dev_attr_dbbrstn.attr, NULL, }; static const struct attribute_group ab8500_attr_group = { .attrs = ab8500_sysfs_entries, }; static const struct attribute_group ab8505_attr_group = { .attrs = ab8505_sysfs_entries, }; static const struct attribute_group ab9540_attr_group = { .attrs = ab9540_sysfs_entries, }; static int ab8500_probe(struct platform_device *pdev) { static const char * const switch_off_status[] = { "Swoff bit programming", "Thermal protection activation", "Vbat lower then BattOk falling threshold", "Watchdog expired", "Non presence of 32kHz clock", "Battery level lower than power on reset threshold", "Power on key 1 pressed longer than 10 seconds", "DB8500 thermal shutdown"}; static const char * const turn_on_status[] = { "Battery rising (Vbat)", "Power On Key 1 dbF", "Power On Key 2 dbF", "RTC Alarm", "Main Charger Detect", "Vbus Detect (USB)", "USB ID Detect", "UART Factory Mode Detect"}; const struct platform_device_id *platid = platform_get_device_id(pdev); enum ab8500_version version = AB8500_VERSION_UNDEFINED; struct device_node *np = pdev->dev.of_node; struct ab8500 *ab8500; struct resource *resource; int ret; int i; u8 value; ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL); if (!ab8500) return -ENOMEM; ab8500->dev = &pdev->dev; resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!resource) { dev_err(&pdev->dev, "no IRQ resource\n"); return -ENODEV; } ab8500->irq = resource->start; ab8500->read = ab8500_prcmu_read; ab8500->write = ab8500_prcmu_write; ab8500->write_masked = ab8500_prcmu_write_masked; mutex_init(&ab8500->lock); mutex_init(&ab8500->irq_lock); atomic_set(&ab8500->transfer_ongoing, 0); platform_set_drvdata(pdev, ab8500); if (platid) version = platid->driver_data; if (version != AB8500_VERSION_UNDEFINED) ab8500->version = version; else { ret = get_register_interruptible(ab8500, AB8500_MISC, AB8500_IC_NAME_REG, &value); if (ret < 0) { dev_err(&pdev->dev, "could not probe HW\n"); return ret; } ab8500->version = value; } ret = get_register_interruptible(ab8500, AB8500_MISC, AB8500_REV_REG, &value); if (ret < 0) return ret; ab8500->chip_id = value; dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n", ab8500_version_str[ab8500->version], ab8500->chip_id >> 4, ab8500->chip_id & 0x0F); /* Configure AB8540 */ if (is_ab8540(ab8500)) { ab8500->mask_size = AB8540_NUM_IRQ_REGS; ab8500->irq_reg_offset = ab8540_irq_regoffset; ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM; } /* Configure AB8500 or AB9540 IRQ */ else if (is_ab9540(ab8500) || is_ab8505(ab8500)) { ab8500->mask_size = AB9540_NUM_IRQ_REGS; ab8500->irq_reg_offset = ab9540_irq_regoffset; ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; } else { ab8500->mask_size = AB8500_NUM_IRQ_REGS; ab8500->irq_reg_offset = ab8500_irq_regoffset; ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; } ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size, GFP_KERNEL); if (!ab8500->mask) return -ENOMEM; ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size, GFP_KERNEL); if (!ab8500->oldmask) return -ENOMEM; /* * ab8500 has switched off due to (SWITCH_OFF_STATUS): * 0x01 Swoff bit programming * 0x02 Thermal protection activation * 0x04 Vbat lower then BattOk falling threshold * 0x08 Watchdog expired * 0x10 Non presence of 32kHz clock * 0x20 Battery level lower than power on reset threshold * 0x40 Power on key 1 pressed longer than 10 seconds * 0x80 DB8500 thermal shutdown */ ret = get_register_interruptible(ab8500, AB8500_RTC, AB8500_SWITCH_OFF_STATUS, &value); if (ret < 0) return ret; dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value); if (value) { for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) { if (value & 1) pr_cont(" \"%s\"", switch_off_status[i]); value = value >> 1; } pr_cont("\n"); } else { pr_cont(" None\n"); } ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, AB8500_TURN_ON_STATUS, &value); if (ret < 0) return ret; dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value); if (value) { for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) { if (value & 1) pr_cont("\"%s\" ", turn_on_status[i]); value = value >> 1; } pr_cont("\n"); } else { pr_cont("None\n"); } if (is_ab9540(ab8500)) { ret = get_register_interruptible(ab8500, AB8500_CHARGER, AB8500_CH_USBCH_STAT1_REG, &value); if (ret < 0) return ret; if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100)) ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON, AB8500_VBUS_DET); } /* Clear and mask all interrupts */ for (i = 0; i < ab8500->mask_size; i++) { /* * Interrupt register 12 doesn't exist prior to AB8500 version * 2.0 */ if (ab8500->irq_reg_offset[i] == 11 && is_ab8500_1p1_or_earlier(ab8500)) continue; if (ab8500->irq_reg_offset[i] < 0) continue; get_register_interruptible(ab8500, AB8500_INTERRUPT, AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i], &value); set_register_interruptible(ab8500, AB8500_INTERRUPT, AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff); } ret = abx500_register_ops(ab8500->dev, &ab8500_ops); if (ret) return ret; for (i = 0; i < ab8500->mask_size; i++) ab8500->mask[i] = ab8500->oldmask[i] = 0xff; ret = ab8500_irq_init(ab8500, np); if (ret) return ret; ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL, ab8500_hierarchical_irq, IRQF_ONESHOT | IRQF_NO_SUSPEND, "ab8500", ab8500); if (ret) return ret; if (is_ab9540(ab8500)) ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs, ARRAY_SIZE(ab9540_devs), NULL, 0, ab8500->domain); else if (is_ab8540(ab8500)) { ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs, ARRAY_SIZE(ab8540_devs), NULL, 0, ab8500->domain); if (ret) return ret; if (is_ab8540_1p2_or_earlier(ab8500)) ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs, ARRAY_SIZE(ab8540_cut1_devs), NULL, 0, ab8500->domain); else /* ab8540 >= cut2 */ ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs, ARRAY_SIZE(ab8540_cut2_devs), NULL, 0, ab8500->domain); } else if (is_ab8505(ab8500)) ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs, ARRAY_SIZE(ab8505_devs), NULL, 0, ab8500->domain); else ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs, ARRAY_SIZE(ab8500_devs), NULL, 0, ab8500->domain); if (ret) return ret; if (!no_bm) { /* Add battery management devices */ ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs, ARRAY_SIZE(ab8500_bm_devs), NULL, 0, ab8500->domain); if (ret) dev_err(ab8500->dev, "error adding bm devices\n"); } if (((is_ab8505(ab8500) || is_ab9540(ab8500)) && ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500)) ret = sysfs_create_group(&ab8500->dev->kobj, &ab9540_attr_group); else ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group); if ((is_ab8505(ab8500) || is_ab9540(ab8500)) && ab8500->chip_id >= AB8500_CUT2P0) ret = sysfs_create_group(&ab8500->dev->kobj, &ab8505_attr_group); if (ret) dev_err(ab8500->dev, "error creating sysfs entries\n"); return ret; } static const struct platform_device_id ab8500_id[] = { { "ab8500-core", AB8500_VERSION_AB8500 }, { "ab8505-i2c", AB8500_VERSION_AB8505 }, { "ab9540-i2c", AB8500_VERSION_AB9540 }, { "ab8540-i2c", AB8500_VERSION_AB8540 }, { } }; static struct platform_driver ab8500_core_driver = { .driver = { .name = "ab8500-core", .suppress_bind_attrs = true, }, .probe = ab8500_probe, .id_table = ab8500_id, }; static int __init ab8500_core_init(void) { return platform_driver_register(&ab8500_core_driver); } core_initcall(ab8500_core_init);