+++ /dev/null
-/*
- * Copyright (C) 2007-2010 ST-Ericsson
- * License terms: GNU General Public License (GPL) version 2
- * Low-level core for exclusive access to the AB3550 IC on the I2C bus
- * and some basic chip-configuration.
- * Author: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
- * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
- * Author: Mattias Wallin <mattias.wallin@stericsson.com>
- * Author: Rickard Andersson <rickard.andersson@stericsson.com>
- */
-
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/random.h>
-#include <linux/workqueue.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-#include <linux/mfd/abx500.h>
-#include <linux/list.h>
-#include <linux/bitops.h>
-#include <linux/spinlock.h>
-#include <linux/mfd/core.h>
-
-#define AB3550_NAME_STRING "ab3550"
-#define AB3550_ID_FORMAT_STRING "AB3550 %s"
-#define AB3550_NUM_BANKS 2
-#define AB3550_NUM_EVENT_REG 5
-
-/* These are the only registers inside AB3550 used in this main file */
-
-/* Chip ID register */
-#define AB3550_CID_REG 0x20
-
-/* Interrupt event registers */
-#define AB3550_EVENT_BANK 0
-#define AB3550_EVENT_REG 0x22
-
-/* Read/write operation values. */
-#define AB3550_PERM_RD (0x01)
-#define AB3550_PERM_WR (0x02)
-
-/* Read/write permissions. */
-#define AB3550_PERM_RO (AB3550_PERM_RD)
-#define AB3550_PERM_RW (AB3550_PERM_RD | AB3550_PERM_WR)
-
-/**
- * struct ab3550
- * @access_mutex: lock out concurrent accesses to the AB registers
- * @i2c_client: I2C client for this chip
- * @chip_name: name of this chip variant
- * @chip_id: 8 bit chip ID for this chip variant
- * @mask_work: a worker for writing to mask registers
- * @event_lock: a lock to protect the event_mask
- * @event_mask: a local copy of the mask event registers
- * @startup_events: a copy of the first reading of the event registers
- * @startup_events_read: whether the first events have been read
- */
-struct ab3550 {
- struct mutex access_mutex;
- struct i2c_client *i2c_client[AB3550_NUM_BANKS];
- char chip_name[32];
- u8 chip_id;
- struct work_struct mask_work;
- spinlock_t event_lock;
- u8 event_mask[AB3550_NUM_EVENT_REG];
- u8 startup_events[AB3550_NUM_EVENT_REG];
- bool startup_events_read;
-#ifdef CONFIG_DEBUG_FS
- unsigned int debug_bank;
- unsigned int debug_address;
-#endif
-};
-
-/**
- * struct ab3550_reg_range
- * @first: the first address of the range
- * @last: the last address of the range
- * @perm: access permissions for the range
- */
-struct ab3550_reg_range {
- u8 first;
- u8 last;
- u8 perm;
-};
-
-/**
- * struct ab3550_reg_ranges
- * @count: the number of ranges in the list
- * @range: the list of register ranges
- */
-struct ab3550_reg_ranges {
- u8 count;
- const struct ab3550_reg_range *range;
-};
-
-/*
- * Permissible register ranges for reading and writing per device and bank.
- *
- * The ranges must be listed in increasing address order, and no overlaps are
- * allowed. It is assumed that write permission implies read permission
- * (i.e. only RO and RW permissions should be used). Ranges with write
- * permission must not be split up.
- */
-
-#define NO_RANGE {.count = 0, .range = NULL,}
-
-static struct
-ab3550_reg_ranges ab3550_reg_ranges[AB3550_NUM_DEVICES][AB3550_NUM_BANKS] = {
- [AB3550_DEVID_DAC] = {
- NO_RANGE,
- {
- .count = 2,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0xb0,
- .last = 0xba,
- .perm = AB3550_PERM_RW,
- },
- {
- .first = 0xbc,
- .last = 0xc3,
- .perm = AB3550_PERM_RW,
- },
- },
- },
- },
- [AB3550_DEVID_LEDS] = {
- NO_RANGE,
- {
- .count = 2,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x5a,
- .last = 0x88,
- .perm = AB3550_PERM_RW,
- },
- {
- .first = 0x8a,
- .last = 0xad,
- .perm = AB3550_PERM_RW,
- },
- }
- },
- },
- [AB3550_DEVID_POWER] = {
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x21,
- .last = 0x21,
- .perm = AB3550_PERM_RO,
- },
- }
- },
- NO_RANGE,
- },
- [AB3550_DEVID_REGULATORS] = {
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x69,
- .last = 0xa3,
- .perm = AB3550_PERM_RW,
- },
- }
- },
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x14,
- .last = 0x16,
- .perm = AB3550_PERM_RW,
- },
- }
- },
- },
- [AB3550_DEVID_SIM] = {
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x21,
- .last = 0x21,
- .perm = AB3550_PERM_RO,
- },
- }
- },
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x14,
- .last = 0x17,
- .perm = AB3550_PERM_RW,
- },
- }
-
- },
- },
- [AB3550_DEVID_UART] = {
- NO_RANGE,
- NO_RANGE,
- },
- [AB3550_DEVID_RTC] = {
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x00,
- .last = 0x0c,
- .perm = AB3550_PERM_RW,
- },
- }
- },
- NO_RANGE,
- },
- [AB3550_DEVID_CHARGER] = {
- {
- .count = 2,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x10,
- .last = 0x1a,
- .perm = AB3550_PERM_RW,
- },
- {
- .first = 0x21,
- .last = 0x21,
- .perm = AB3550_PERM_RO,
- },
- }
- },
- NO_RANGE,
- },
- [AB3550_DEVID_ADC] = {
- NO_RANGE,
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x20,
- .last = 0x56,
- .perm = AB3550_PERM_RW,
- },
-
- }
- },
- },
- [AB3550_DEVID_FUELGAUGE] = {
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x21,
- .last = 0x21,
- .perm = AB3550_PERM_RO,
- },
- }
- },
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x00,
- .last = 0x0e,
- .perm = AB3550_PERM_RW,
- },
- }
- },
- },
- [AB3550_DEVID_VIBRATOR] = {
- NO_RANGE,
- {
- .count = 1,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x10,
- .last = 0x13,
- .perm = AB3550_PERM_RW,
- },
-
- }
- },
- },
- [AB3550_DEVID_CODEC] = {
- {
- .count = 2,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x31,
- .last = 0x63,
- .perm = AB3550_PERM_RW,
- },
- {
- .first = 0x65,
- .last = 0x68,
- .perm = AB3550_PERM_RW,
- },
- }
- },
- NO_RANGE,
- },
-};
-
-static struct mfd_cell ab3550_devs[AB3550_NUM_DEVICES] = {
- [AB3550_DEVID_DAC] = {
- .name = "ab3550-dac",
- .id = AB3550_DEVID_DAC,
- .num_resources = 0,
- },
- [AB3550_DEVID_LEDS] = {
- .name = "ab3550-leds",
- .id = AB3550_DEVID_LEDS,
- },
- [AB3550_DEVID_POWER] = {
- .name = "ab3550-power",
- .id = AB3550_DEVID_POWER,
- },
- [AB3550_DEVID_REGULATORS] = {
- .name = "ab3550-regulators",
- .id = AB3550_DEVID_REGULATORS,
- },
- [AB3550_DEVID_SIM] = {
- .name = "ab3550-sim",
- .id = AB3550_DEVID_SIM,
- },
- [AB3550_DEVID_UART] = {
- .name = "ab3550-uart",
- .id = AB3550_DEVID_UART,
- },
- [AB3550_DEVID_RTC] = {
- .name = "ab3550-rtc",
- .id = AB3550_DEVID_RTC,
- },
- [AB3550_DEVID_CHARGER] = {
- .name = "ab3550-charger",
- .id = AB3550_DEVID_CHARGER,
- },
- [AB3550_DEVID_ADC] = {
- .name = "ab3550-adc",
- .id = AB3550_DEVID_ADC,
- .num_resources = 10,
- .resources = (struct resource[]) {
- {
- .name = "TRIGGER-0",
- .flags = IORESOURCE_IRQ,
- .start = 16,
- .end = 16,
- },
- {
- .name = "TRIGGER-1",
- .flags = IORESOURCE_IRQ,
- .start = 17,
- .end = 17,
- },
- {
- .name = "TRIGGER-2",
- .flags = IORESOURCE_IRQ,
- .start = 18,
- .end = 18,
- },
- {
- .name = "TRIGGER-3",
- .flags = IORESOURCE_IRQ,
- .start = 19,
- .end = 19,
- },
- {
- .name = "TRIGGER-4",
- .flags = IORESOURCE_IRQ,
- .start = 20,
- .end = 20,
- },
- {
- .name = "TRIGGER-5",
- .flags = IORESOURCE_IRQ,
- .start = 21,
- .end = 21,
- },
- {
- .name = "TRIGGER-6",
- .flags = IORESOURCE_IRQ,
- .start = 22,
- .end = 22,
- },
- {
- .name = "TRIGGER-7",
- .flags = IORESOURCE_IRQ,
- .start = 23,
- .end = 23,
- },
- {
- .name = "TRIGGER-VBAT-TXON",
- .flags = IORESOURCE_IRQ,
- .start = 13,
- .end = 13,
- },
- {
- .name = "TRIGGER-VBAT",
- .flags = IORESOURCE_IRQ,
- .start = 12,
- .end = 12,
- },
- },
- },
- [AB3550_DEVID_FUELGAUGE] = {
- .name = "ab3550-fuelgauge",
- .id = AB3550_DEVID_FUELGAUGE,
- },
- [AB3550_DEVID_VIBRATOR] = {
- .name = "ab3550-vibrator",
- .id = AB3550_DEVID_VIBRATOR,
- },
- [AB3550_DEVID_CODEC] = {
- .name = "ab3550-codec",
- .id = AB3550_DEVID_CODEC,
- },
-};
-
-/*
- * I2C transactions with error messages.
- */
-static int ab3550_i2c_master_send(struct ab3550 *ab, u8 bank, u8 *data,
- u8 count)
-{
- int err;
-
- err = i2c_master_send(ab->i2c_client[bank], data, count);
- if (err < 0) {
- dev_err(&ab->i2c_client[0]->dev, "send error: %d\n", err);
- return err;
- }
- return 0;
-}
-
-static int ab3550_i2c_master_recv(struct ab3550 *ab, u8 bank, u8 *data,
- u8 count)
-{
- int err;
-
- err = i2c_master_recv(ab->i2c_client[bank], data, count);
- if (err < 0) {
- dev_err(&ab->i2c_client[0]->dev, "receive error: %d\n", err);
- return err;
- }
- return 0;
-}
-
-/*
- * Functionality for getting/setting register values.
- */
-static int get_register_interruptible(struct ab3550 *ab, u8 bank, u8 reg,
- u8 *value)
-{
- int err;
-
- err = mutex_lock_interruptible(&ab->access_mutex);
- if (err)
- return err;
-
- err = ab3550_i2c_master_send(ab, bank, ®, 1);
- if (!err)
- err = ab3550_i2c_master_recv(ab, bank, value, 1);
-
- mutex_unlock(&ab->access_mutex);
- return err;
-}
-
-static int get_register_page_interruptible(struct ab3550 *ab, u8 bank,
- u8 first_reg, u8 *regvals, u8 numregs)
-{
- int err;
-
- err = mutex_lock_interruptible(&ab->access_mutex);
- if (err)
- return err;
-
- err = ab3550_i2c_master_send(ab, bank, &first_reg, 1);
- if (!err)
- err = ab3550_i2c_master_recv(ab, bank, regvals, numregs);
-
- mutex_unlock(&ab->access_mutex);
- return err;
-}
-
-static int mask_and_set_register_interruptible(struct ab3550 *ab, u8 bank,
- u8 reg, u8 bitmask, u8 bitvalues)
-{
- int err = 0;
-
- if (likely(bitmask)) {
- u8 reg_bits[2] = {reg, 0};
-
- err = mutex_lock_interruptible(&ab->access_mutex);
- if (err)
- return err;
-
- if (bitmask == 0xFF) /* No need to read in this case. */
- reg_bits[1] = bitvalues;
- else { /* Read and modify the register value. */
- u8 bits;
-
- err = ab3550_i2c_master_send(ab, bank, ®, 1);
- if (err)
- goto unlock_and_return;
- err = ab3550_i2c_master_recv(ab, bank, &bits, 1);
- if (err)
- goto unlock_and_return;
- reg_bits[1] = ((~bitmask & bits) |
- (bitmask & bitvalues));
- }
- /* Write the new value. */
- err = ab3550_i2c_master_send(ab, bank, reg_bits, 2);
-unlock_and_return:
- mutex_unlock(&ab->access_mutex);
- }
- return err;
-}
-
-/*
- * Read/write permission checking functions.
- */
-static bool page_write_allowed(const struct ab3550_reg_ranges *ranges,
- u8 first_reg, u8 last_reg)
-{
- u8 i;
-
- if (last_reg < first_reg)
- return false;
-
- for (i = 0; i < ranges->count; i++) {
- if (first_reg < ranges->range[i].first)
- break;
- if ((last_reg <= ranges->range[i].last) &&
- (ranges->range[i].perm & AB3550_PERM_WR))
- return true;
- }
- return false;
-}
-
-static bool reg_write_allowed(const struct ab3550_reg_ranges *ranges, u8 reg)
-{
- return page_write_allowed(ranges, reg, reg);
-}
-
-static bool page_read_allowed(const struct ab3550_reg_ranges *ranges,
- u8 first_reg, u8 last_reg)
-{
- u8 i;
-
- if (last_reg < first_reg)
- return false;
- /* Find the range (if it exists in the list) that includes first_reg. */
- for (i = 0; i < ranges->count; i++) {
- if (first_reg < ranges->range[i].first)
- return false;
- if (first_reg <= ranges->range[i].last)
- break;
- }
- /* Make sure that the entire range up to and including last_reg is
- * readable. This may span several of the ranges in the list.
- */
- while ((i < ranges->count) &&
- (ranges->range[i].perm & AB3550_PERM_RD)) {
- if (last_reg <= ranges->range[i].last)
- return true;
- if ((++i >= ranges->count) ||
- (ranges->range[i].first !=
- (ranges->range[i - 1].last + 1))) {
- break;
- }
- }
- return false;
-}
-
-static bool reg_read_allowed(const struct ab3550_reg_ranges *ranges, u8 reg)
-{
- return page_read_allowed(ranges, reg, reg);
-}
-
-/*
- * The register access functionality.
- */
-static int ab3550_get_chip_id(struct device *dev)
-{
- struct ab3550 *ab = dev_get_drvdata(dev->parent);
- return (int)ab->chip_id;
-}
-
-static int ab3550_mask_and_set_register_interruptible(struct device *dev,
- u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
-{
- struct ab3550 *ab;
- struct platform_device *pdev = to_platform_device(dev);
-
- if ((AB3550_NUM_BANKS <= bank) ||
- !reg_write_allowed(&ab3550_reg_ranges[pdev->id][bank], reg))
- return -EINVAL;
-
- ab = dev_get_drvdata(dev->parent);
- return mask_and_set_register_interruptible(ab, bank, reg,
- bitmask, bitvalues);
-}
-
-static int ab3550_set_register_interruptible(struct device *dev, u8 bank,
- u8 reg, u8 value)
-{
- return ab3550_mask_and_set_register_interruptible(dev, bank, reg, 0xFF,
- value);
-}
-
-static int ab3550_get_register_interruptible(struct device *dev, u8 bank,
- u8 reg, u8 *value)
-{
- struct ab3550 *ab;
- struct platform_device *pdev = to_platform_device(dev);
-
- if ((AB3550_NUM_BANKS <= bank) ||
- !reg_read_allowed(&ab3550_reg_ranges[pdev->id][bank], reg))
- return -EINVAL;
-
- ab = dev_get_drvdata(dev->parent);
- return get_register_interruptible(ab, bank, reg, value);
-}
-
-static int ab3550_get_register_page_interruptible(struct device *dev, u8 bank,
- u8 first_reg, u8 *regvals, u8 numregs)
-{
- struct ab3550 *ab;
- struct platform_device *pdev = to_platform_device(dev);
-
- if ((AB3550_NUM_BANKS <= bank) ||
- !page_read_allowed(&ab3550_reg_ranges[pdev->id][bank],
- first_reg, (first_reg + numregs - 1)))
- return -EINVAL;
-
- ab = dev_get_drvdata(dev->parent);
- return get_register_page_interruptible(ab, bank, first_reg, regvals,
- numregs);
-}
-
-static int ab3550_event_registers_startup_state_get(struct device *dev,
- u8 *event)
-{
- struct ab3550 *ab;
-
- ab = dev_get_drvdata(dev->parent);
- if (!ab->startup_events_read)
- return -EAGAIN; /* Try again later */
-
- memcpy(event, ab->startup_events, AB3550_NUM_EVENT_REG);
- return 0;
-}
-
-static int ab3550_startup_irq_enabled(struct device *dev, unsigned int irq)
-{
- struct ab3550 *ab;
- struct ab3550_platform_data *plf_data;
- bool val;
-
- ab = irq_get_chip_data(irq);
- plf_data = ab->i2c_client[0]->dev.platform_data;
- irq -= plf_data->irq.base;
- val = ((ab->startup_events[irq / 8] & BIT(irq % 8)) != 0);
-
- return val;
-}
-
-static struct abx500_ops ab3550_ops = {
- .get_chip_id = ab3550_get_chip_id,
- .get_register = ab3550_get_register_interruptible,
- .set_register = ab3550_set_register_interruptible,
- .get_register_page = ab3550_get_register_page_interruptible,
- .set_register_page = NULL,
- .mask_and_set_register = ab3550_mask_and_set_register_interruptible,
- .event_registers_startup_state_get =
- ab3550_event_registers_startup_state_get,
- .startup_irq_enabled = ab3550_startup_irq_enabled,
-};
-
-static irqreturn_t ab3550_irq_handler(int irq, void *data)
-{
- struct ab3550 *ab = data;
- int err;
- unsigned int i;
- u8 e[AB3550_NUM_EVENT_REG];
- u8 *events;
- unsigned long flags;
-
- events = (ab->startup_events_read ? e : ab->startup_events);
-
- err = get_register_page_interruptible(ab, AB3550_EVENT_BANK,
- AB3550_EVENT_REG, events, AB3550_NUM_EVENT_REG);
- if (err)
- goto err_event_rd;
-
- if (!ab->startup_events_read) {
- dev_info(&ab->i2c_client[0]->dev,
- "startup events 0x%x,0x%x,0x%x,0x%x,0x%x\n",
- ab->startup_events[0], ab->startup_events[1],
- ab->startup_events[2], ab->startup_events[3],
- ab->startup_events[4]);
- ab->startup_events_read = true;
- goto out;
- }
-
- /* The two highest bits in event[4] are not used. */
- events[4] &= 0x3f;
-
- spin_lock_irqsave(&ab->event_lock, flags);
- for (i = 0; i < AB3550_NUM_EVENT_REG; i++)
- events[i] &= ~ab->event_mask[i];
- spin_unlock_irqrestore(&ab->event_lock, flags);
-
- for (i = 0; i < AB3550_NUM_EVENT_REG; i++) {
- u8 bit;
- u8 event_reg;
-
- dev_dbg(&ab->i2c_client[0]->dev, "IRQ Event[%d]: 0x%2x\n",
- i, events[i]);
-
- event_reg = events[i];
- for (bit = 0; event_reg; bit++, event_reg /= 2) {
- if (event_reg % 2) {
- unsigned int irq;
- struct ab3550_platform_data *plf_data;
-
- plf_data = ab->i2c_client[0]->dev.platform_data;
- irq = plf_data->irq.base + (i * 8) + bit;
- handle_nested_irq(irq);
- }
- }
- }
-out:
- return IRQ_HANDLED;
-
-err_event_rd:
- dev_dbg(&ab->i2c_client[0]->dev, "error reading event registers\n");
- return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_DEBUG_FS
-static struct ab3550_reg_ranges debug_ranges[AB3550_NUM_BANKS] = {
- {
- .count = 6,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x00,
- .last = 0x0e,
- },
- {
- .first = 0x10,
- .last = 0x1a,
- },
- {
- .first = 0x1e,
- .last = 0x4f,
- },
- {
- .first = 0x51,
- .last = 0x63,
- },
- {
- .first = 0x65,
- .last = 0xa3,
- },
- {
- .first = 0xa5,
- .last = 0xa8,
- },
- }
- },
- {
- .count = 8,
- .range = (struct ab3550_reg_range[]) {
- {
- .first = 0x00,
- .last = 0x0e,
- },
- {
- .first = 0x10,
- .last = 0x17,
- },
- {
- .first = 0x1a,
- .last = 0x1c,
- },
- {
- .first = 0x20,
- .last = 0x56,
- },
- {
- .first = 0x5a,
- .last = 0x88,
- },
- {
- .first = 0x8a,
- .last = 0xad,
- },
- {
- .first = 0xb0,
- .last = 0xba,
- },
- {
- .first = 0xbc,
- .last = 0xc3,
- },
- }
- },
-};
-
-static int ab3550_registers_print(struct seq_file *s, void *p)
-{
- struct ab3550 *ab = s->private;
- int bank;
-
- seq_printf(s, AB3550_NAME_STRING " register values:\n");
-
- for (bank = 0; bank < AB3550_NUM_BANKS; bank++) {
- unsigned int i;
-
- seq_printf(s, " bank %d:\n", bank);
- for (i = 0; i < debug_ranges[bank].count; i++) {
- u8 reg;
-
- for (reg = debug_ranges[bank].range[i].first;
- reg <= debug_ranges[bank].range[i].last;
- reg++) {
- u8 value;
-
- get_register_interruptible(ab, bank, reg,
- &value);
- seq_printf(s, " [%d/0x%02X]: 0x%02X\n", bank,
- reg, value);
- }
- }
- }
- return 0;
-}
-
-static int ab3550_registers_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ab3550_registers_print, inode->i_private);
-}
-
-static const struct file_operations ab3550_registers_fops = {
- .open = ab3550_registers_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
-
-static int ab3550_bank_print(struct seq_file *s, void *p)
-{
- struct ab3550 *ab = s->private;
-
- seq_printf(s, "%d\n", ab->debug_bank);
- return 0;
-}
-
-static int ab3550_bank_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ab3550_bank_print, inode->i_private);
-}
-
-static ssize_t ab3550_bank_write(struct file *file,
- const char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct ab3550 *ab = ((struct seq_file *)(file->private_data))->private;
- unsigned long user_bank;
- int err;
-
- /* Get userspace string and assure termination */
- err = kstrtoul_from_user(user_buf, count, 0, &user_bank);
- if (err)
- return err;
-
- if (user_bank >= AB3550_NUM_BANKS) {
- dev_err(&ab->i2c_client[0]->dev,
- "debugfs error input > number of banks\n");
- return -EINVAL;
- }
-
- ab->debug_bank = user_bank;
-
- return count;
-}
-
-static int ab3550_address_print(struct seq_file *s, void *p)
-{
- struct ab3550 *ab = s->private;
-
- seq_printf(s, "0x%02X\n", ab->debug_address);
- return 0;
-}
-
-static int ab3550_address_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ab3550_address_print, inode->i_private);
-}
-
-static ssize_t ab3550_address_write(struct file *file,
- const char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct ab3550 *ab = ((struct seq_file *)(file->private_data))->private;
- unsigned long user_address;
- int err;
-
- /* Get userspace string and assure termination */
- err = kstrtoul_from_user(user_buf, count, 0, &user_address);
- if (err)
- return err;
-
- if (user_address > 0xff) {
- dev_err(&ab->i2c_client[0]->dev,
- "debugfs error input > 0xff\n");
- return -EINVAL;
- }
- ab->debug_address = user_address;
- return count;
-}
-
-static int ab3550_val_print(struct seq_file *s, void *p)
-{
- struct ab3550 *ab = s->private;
- int err;
- u8 regvalue;
-
- err = get_register_interruptible(ab, (u8)ab->debug_bank,
- (u8)ab->debug_address, ®value);
- if (err)
- return -EINVAL;
- seq_printf(s, "0x%02X\n", regvalue);
-
- return 0;
-}
-
-static int ab3550_val_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ab3550_val_print, inode->i_private);
-}
-
-static ssize_t ab3550_val_write(struct file *file,
- const char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct ab3550 *ab = ((struct seq_file *)(file->private_data))->private;
- unsigned long user_val;
- int err;
- u8 regvalue;
-
- /* Get userspace string and assure termination */
- err = kstrtoul_from_user(user_buf, count, 0, &user_val);
- if (err)
- return err;
-
- if (user_val > 0xff) {
- dev_err(&ab->i2c_client[0]->dev,
- "debugfs error input > 0xff\n");
- return -EINVAL;
- }
- err = mask_and_set_register_interruptible(
- ab, (u8)ab->debug_bank,
- (u8)ab->debug_address, 0xFF, (u8)user_val);
- if (err)
- return -EINVAL;
-
- get_register_interruptible(ab, (u8)ab->debug_bank,
- (u8)ab->debug_address, ®value);
- if (err)
- return -EINVAL;
-
- return count;
-}
-
-static const struct file_operations ab3550_bank_fops = {
- .open = ab3550_bank_open,
- .write = ab3550_bank_write,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
-
-static const struct file_operations ab3550_address_fops = {
- .open = ab3550_address_open,
- .write = ab3550_address_write,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
-
-static const struct file_operations ab3550_val_fops = {
- .open = ab3550_val_open,
- .write = ab3550_val_write,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
-
-static struct dentry *ab3550_dir;
-static struct dentry *ab3550_reg_file;
-static struct dentry *ab3550_bank_file;
-static struct dentry *ab3550_address_file;
-static struct dentry *ab3550_val_file;
-
-static inline void ab3550_setup_debugfs(struct ab3550 *ab)
-{
- ab->debug_bank = 0;
- ab->debug_address = 0x00;
-
- ab3550_dir = debugfs_create_dir(AB3550_NAME_STRING, NULL);
- if (!ab3550_dir)
- goto exit_no_debugfs;
-
- ab3550_reg_file = debugfs_create_file("all-registers",
- S_IRUGO, ab3550_dir, ab, &ab3550_registers_fops);
- if (!ab3550_reg_file)
- goto exit_destroy_dir;
-
- ab3550_bank_file = debugfs_create_file("register-bank",
- (S_IRUGO | S_IWUSR), ab3550_dir, ab, &ab3550_bank_fops);
- if (!ab3550_bank_file)
- goto exit_destroy_reg;
-
- ab3550_address_file = debugfs_create_file("register-address",
- (S_IRUGO | S_IWUSR), ab3550_dir, ab, &ab3550_address_fops);
- if (!ab3550_address_file)
- goto exit_destroy_bank;
-
- ab3550_val_file = debugfs_create_file("register-value",
- (S_IRUGO | S_IWUSR), ab3550_dir, ab, &ab3550_val_fops);
- if (!ab3550_val_file)
- goto exit_destroy_address;
-
- return;
-
-exit_destroy_address:
- debugfs_remove(ab3550_address_file);
-exit_destroy_bank:
- debugfs_remove(ab3550_bank_file);
-exit_destroy_reg:
- debugfs_remove(ab3550_reg_file);
-exit_destroy_dir:
- debugfs_remove(ab3550_dir);
-exit_no_debugfs:
- dev_err(&ab->i2c_client[0]->dev, "failed to create debugfs entries.\n");
- return;
-}
-
-static inline void ab3550_remove_debugfs(void)
-{
- debugfs_remove(ab3550_val_file);
- debugfs_remove(ab3550_address_file);
- debugfs_remove(ab3550_bank_file);
- debugfs_remove(ab3550_reg_file);
- debugfs_remove(ab3550_dir);
-}
-
-#else /* !CONFIG_DEBUG_FS */
-static inline void ab3550_setup_debugfs(struct ab3550 *ab)
-{
-}
-static inline void ab3550_remove_debugfs(void)
-{
-}
-#endif
-
-/*
- * Basic set-up, datastructure creation/destruction and I2C interface.
- * This sets up a default config in the AB3550 chip so that it
- * will work as expected.
- */
-static int __devinit ab3550_setup(struct ab3550 *ab)
-{
- int err = 0;
- int i;
- struct ab3550_platform_data *plf_data;
- struct abx500_init_settings *settings;
-
- plf_data = ab->i2c_client[0]->dev.platform_data;
- settings = plf_data->init_settings;
-
- for (i = 0; i < plf_data->init_settings_sz; i++) {
- err = mask_and_set_register_interruptible(ab,
- settings[i].bank,
- settings[i].reg,
- 0xFF, settings[i].setting);
- if (err)
- goto exit_no_setup;
-
- /* If event mask register update the event mask in ab3550 */
- if ((settings[i].bank == 0) &&
- (AB3550_IMR1 <= settings[i].reg) &&
- (settings[i].reg <= AB3550_IMR5)) {
- ab->event_mask[settings[i].reg - AB3550_IMR1] =
- settings[i].setting;
- }
- }
-exit_no_setup:
- return err;
-}
-
-static void ab3550_mask_work(struct work_struct *work)
-{
- struct ab3550 *ab = container_of(work, struct ab3550, mask_work);
- int i;
- unsigned long flags;
- u8 mask[AB3550_NUM_EVENT_REG];
-
- spin_lock_irqsave(&ab->event_lock, flags);
- for (i = 0; i < AB3550_NUM_EVENT_REG; i++)
- mask[i] = ab->event_mask[i];
- spin_unlock_irqrestore(&ab->event_lock, flags);
-
- for (i = 0; i < AB3550_NUM_EVENT_REG; i++) {
- int err;
-
- err = mask_and_set_register_interruptible(ab, 0,
- (AB3550_IMR1 + i), ~0, mask[i]);
- if (err)
- dev_err(&ab->i2c_client[0]->dev,
- "ab3550_mask_work failed 0x%x,0x%x\n",
- (AB3550_IMR1 + i), mask[i]);
- }
-}
-
-static void ab3550_mask(struct irq_data *data)
-{
- unsigned long flags;
- struct ab3550 *ab;
- struct ab3550_platform_data *plf_data;
- int irq;
-
- ab = irq_data_get_irq_chip_data(data);
- plf_data = ab->i2c_client[0]->dev.platform_data;
- irq = data->irq - plf_data->irq.base;
-
- spin_lock_irqsave(&ab->event_lock, flags);
- ab->event_mask[irq / 8] |= BIT(irq % 8);
- spin_unlock_irqrestore(&ab->event_lock, flags);
-
- schedule_work(&ab->mask_work);
-}
-
-static void ab3550_unmask(struct irq_data *data)
-{
- unsigned long flags;
- struct ab3550 *ab;
- struct ab3550_platform_data *plf_data;
- int irq;
-
- ab = irq_data_get_irq_chip_data(data);
- plf_data = ab->i2c_client[0]->dev.platform_data;
- irq = data->irq - plf_data->irq.base;
-
- spin_lock_irqsave(&ab->event_lock, flags);
- ab->event_mask[irq / 8] &= ~BIT(irq % 8);
- spin_unlock_irqrestore(&ab->event_lock, flags);
-
- schedule_work(&ab->mask_work);
-}
-
-static void noop(struct irq_data *data)
-{
-}
-
-static struct irq_chip ab3550_irq_chip = {
- .name = "ab3550-core", /* Keep the same name as the request */
- .irq_disable = ab3550_mask, /* No default to mask in chip.c */
- .irq_ack = noop,
- .irq_mask = ab3550_mask,
- .irq_unmask = ab3550_unmask,
-};
-
-struct ab_family_id {
- u8 id;
- char *name;
-};
-
-static const struct ab_family_id ids[] __devinitconst = {
- /* AB3550 */
- {
- .id = AB3550_P1A,
- .name = "P1A"
- },
- /* Terminator */
- {
- .id = 0x00,
- }
-};
-
-static int __devinit ab3550_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct ab3550 *ab;
- struct ab3550_platform_data *ab3550_plf_data =
- client->dev.platform_data;
- int err;
- int i;
- int num_i2c_clients = 0;
-
- ab = kzalloc(sizeof(struct ab3550), GFP_KERNEL);
- if (!ab) {
- dev_err(&client->dev,
- "could not allocate " AB3550_NAME_STRING " device\n");
- return -ENOMEM;
- }
-
- /* Initialize data structure */
- mutex_init(&ab->access_mutex);
- spin_lock_init(&ab->event_lock);
- ab->i2c_client[0] = client;
-
- i2c_set_clientdata(client, ab);
-
- /* Read chip ID register */
- err = get_register_interruptible(ab, 0, AB3550_CID_REG, &ab->chip_id);
- if (err) {
- dev_err(&client->dev, "could not communicate with the analog "
- "baseband chip\n");
- goto exit_no_detect;
- }
-
- for (i = 0; ids[i].id != 0x0; i++) {
- if (ids[i].id == ab->chip_id) {
- snprintf(&ab->chip_name[0], sizeof(ab->chip_name) - 1,
- AB3550_ID_FORMAT_STRING, ids[i].name);
- break;
- }
- }
-
- if (ids[i].id == 0x0) {
- dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n",
- ab->chip_id);
- dev_err(&client->dev, "driver not started!\n");
- goto exit_no_detect;
- }
-
- dev_info(&client->dev, "detected AB chip: %s\n", &ab->chip_name[0]);
-
- /* Attach other dummy I2C clients. */
- while (++num_i2c_clients < AB3550_NUM_BANKS) {
- ab->i2c_client[num_i2c_clients] =
- i2c_new_dummy(client->adapter,
- (client->addr + num_i2c_clients));
- if (!ab->i2c_client[num_i2c_clients]) {
- err = -ENOMEM;
- goto exit_no_dummy_client;
- }
- strlcpy(ab->i2c_client[num_i2c_clients]->name, id->name,
- sizeof(ab->i2c_client[num_i2c_clients]->name));
- }
-
- err = ab3550_setup(ab);
- if (err)
- goto exit_no_setup;
-
- INIT_WORK(&ab->mask_work, ab3550_mask_work);
-
- for (i = 0; i < ab3550_plf_data->irq.count; i++) {
- unsigned int irq;
-
- irq = ab3550_plf_data->irq.base + i;
- irq_set_chip_data(irq, ab);
- irq_set_chip_and_handler(irq, &ab3550_irq_chip,
- handle_simple_irq);
- irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
- }
-
- err = request_threaded_irq(client->irq, NULL, ab3550_irq_handler,
- IRQF_ONESHOT, "ab3550-core", ab);
- /* This real unpredictable IRQ is of course sampled for entropy */
- rand_initialize_irq(client->irq);
-
- if (err)
- goto exit_no_irq;
-
- err = abx500_register_ops(&client->dev, &ab3550_ops);
- if (err)
- goto exit_no_ops;
-
- /* Set up and register the platform devices. */
- for (i = 0; i < AB3550_NUM_DEVICES; i++) {
- ab3550_devs[i].platform_data = ab3550_plf_data->dev_data[i];
- ab3550_devs[i].pdata_size = ab3550_plf_data->dev_data_sz[i];
- }
-
- err = mfd_add_devices(&client->dev, 0, ab3550_devs,
- ARRAY_SIZE(ab3550_devs), NULL,
- ab3550_plf_data->irq.base);
-
- ab3550_setup_debugfs(ab);
-
- return 0;
-
-exit_no_ops:
-exit_no_irq:
-exit_no_setup:
-exit_no_dummy_client:
- /* Unregister the dummy i2c clients. */
- while (--num_i2c_clients)
- i2c_unregister_device(ab->i2c_client[num_i2c_clients]);
-exit_no_detect:
- kfree(ab);
- return err;
-}
-
-static int __devexit ab3550_remove(struct i2c_client *client)
-{
- struct ab3550 *ab = i2c_get_clientdata(client);
- int num_i2c_clients = AB3550_NUM_BANKS;
-
- mfd_remove_devices(&client->dev);
- ab3550_remove_debugfs();
-
- while (--num_i2c_clients)
- i2c_unregister_device(ab->i2c_client[num_i2c_clients]);
-
- /*
- * At this point, all subscribers should have unregistered
- * their notifiers so deactivate IRQ
- */
- free_irq(client->irq, ab);
- kfree(ab);
- return 0;
-}
-
-static const struct i2c_device_id ab3550_id[] = {
- {AB3550_NAME_STRING, 0},
- {}
-};
-MODULE_DEVICE_TABLE(i2c, ab3550_id);
-
-static struct i2c_driver ab3550_driver = {
- .driver = {
- .name = AB3550_NAME_STRING,
- .owner = THIS_MODULE,
- },
- .id_table = ab3550_id,
- .probe = ab3550_probe,
- .remove = __devexit_p(ab3550_remove),
-};
-
-static int __init ab3550_i2c_init(void)
-{
- return i2c_add_driver(&ab3550_driver);
-}
-
-static void __exit ab3550_i2c_exit(void)
-{
- i2c_del_driver(&ab3550_driver);
-}
-
-subsys_initcall(ab3550_i2c_init);
-module_exit(ab3550_i2c_exit);
-
-MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
-MODULE_DESCRIPTION("AB3550 core driver");
-MODULE_LICENSE("GPL");
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff