--- /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 AB3100 IC on the I2C bus
+ * and some basic chip-configuration.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/notifier.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/random.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/ab3100.h>
+#include <linux/mfd/abx500.h>
+
+/* These are the only registers inside AB3100 used in this main file */
+
+/* Interrupt event registers */
+#define AB3100_EVENTA1 0x21
+#define AB3100_EVENTA2 0x22
+#define AB3100_EVENTA3 0x23
+
+/* AB3100 DAC converter registers */
+#define AB3100_DIS 0x00
+#define AB3100_D0C 0x01
+#define AB3100_D1C 0x02
+#define AB3100_D2C 0x03
+#define AB3100_D3C 0x04
+
+/* Chip ID register */
+#define AB3100_CID 0x20
+
+/* AB3100 interrupt registers */
+#define AB3100_IMRA1 0x24
+#define AB3100_IMRA2 0x25
+#define AB3100_IMRA3 0x26
+#define AB3100_IMRB1 0x2B
+#define AB3100_IMRB2 0x2C
+#define AB3100_IMRB3 0x2D
+
+/* System Power Monitoring and control registers */
+#define AB3100_MCA 0x2E
+#define AB3100_MCB 0x2F
+
+/* SIM power up */
+#define AB3100_SUP 0x50
+
+/*
+ * I2C communication
+ *
+ * The AB3100 is usually assigned address 0x48 (7-bit)
+ * The chip is defined in the platform i2c_board_data section.
+ */
+static int ab3100_get_chip_id(struct device *dev)
+{
+ struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
+
+ return (int)ab3100->chip_id;
+}
+
+static int ab3100_set_register_interruptible(struct ab3100 *ab3100,
+ u8 reg, u8 regval)
+{
+ u8 regandval[2] = {reg, regval};
+ int err;
+
+ err = mutex_lock_interruptible(&ab3100->access_mutex);
+ if (err)
+ return err;
+
+ /*
+ * A two-byte write message with the first byte containing the register
+ * number and the second byte containing the value to be written
+ * effectively sets a register in the AB3100.
+ */
+ err = i2c_master_send(ab3100->i2c_client, regandval, 2);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (write register): %d\n",
+ err);
+ } else if (err != 2) {
+ dev_err(ab3100->dev,
+ "write error (write register)\n"
+ " %d bytes transferred (expected 2)\n",
+ err);
+ err = -EIO;
+ } else {
+ /* All is well */
+ err = 0;
+ }
+ mutex_unlock(&ab3100->access_mutex);
+ return err;
+}
+
+static int set_register_interruptible(struct device *dev,
+ u8 bank, u8 reg, u8 value)
+{
+ struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
+
+ return ab3100_set_register_interruptible(ab3100, reg, value);
+}
+
+/*
+ * The test registers exist at an I2C bus address up one
+ * from the ordinary base. They are not supposed to be used
+ * in production code, but sometimes you have to do that
+ * anyway. It's currently only used from this file so declare
+ * it static and do not export.
+ */
+static int ab3100_set_test_register_interruptible(struct ab3100 *ab3100,
+ u8 reg, u8 regval)
+{
+ u8 regandval[2] = {reg, regval};
+ int err;
+
+ err = mutex_lock_interruptible(&ab3100->access_mutex);
+ if (err)
+ return err;
+
+ err = i2c_master_send(ab3100->testreg_client, regandval, 2);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (write test register): %d\n",
+ err);
+ } else if (err != 2) {
+ dev_err(ab3100->dev,
+ "write error (write test register)\n"
+ " %d bytes transferred (expected 2)\n",
+ err);
+ err = -EIO;
+ } else {
+ /* All is well */
+ err = 0;
+ }
+ mutex_unlock(&ab3100->access_mutex);
+
+ return err;
+}
+
+static int ab3100_get_register_interruptible(struct ab3100 *ab3100,
+ u8 reg, u8 *regval)
+{
+ int err;
+
+ err = mutex_lock_interruptible(&ab3100->access_mutex);
+ if (err)
+ return err;
+
+ /*
+ * AB3100 require an I2C "stop" command between each message, else
+ * it will not work. The only way of achieveing this with the
+ * message transport layer is to send the read and write messages
+ * separately.
+ */
+ err = i2c_master_send(ab3100->i2c_client, ®, 1);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (send register address): %d\n",
+ err);
+ goto get_reg_out_unlock;
+ } else if (err != 1) {
+ dev_err(ab3100->dev,
+ "write error (send register address)\n"
+ " %d bytes transferred (expected 1)\n",
+ err);
+ err = -EIO;
+ goto get_reg_out_unlock;
+ } else {
+ /* All is well */
+ err = 0;
+ }
+
+ err = i2c_master_recv(ab3100->i2c_client, regval, 1);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (read register): %d\n",
+ err);
+ goto get_reg_out_unlock;
+ } else if (err != 1) {
+ dev_err(ab3100->dev,
+ "write error (read register)\n"
+ " %d bytes transferred (expected 1)\n",
+ err);
+ err = -EIO;
+ goto get_reg_out_unlock;
+ } else {
+ /* All is well */
+ err = 0;
+ }
+
+ get_reg_out_unlock:
+ mutex_unlock(&ab3100->access_mutex);
+ return err;
+}
+
+static int get_register_interruptible(struct device *dev, u8 bank, u8 reg,
+ u8 *value)
+{
+ struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
+
+ return ab3100_get_register_interruptible(ab3100, reg, value);
+}
+
+static int ab3100_get_register_page_interruptible(struct ab3100 *ab3100,
+ u8 first_reg, u8 *regvals, u8 numregs)
+{
+ int err;
+
+ if (ab3100->chip_id == 0xa0 ||
+ ab3100->chip_id == 0xa1)
+ /* These don't support paged reads */
+ return -EIO;
+
+ err = mutex_lock_interruptible(&ab3100->access_mutex);
+ if (err)
+ return err;
+
+ /*
+ * Paged read also require an I2C "stop" command.
+ */
+ err = i2c_master_send(ab3100->i2c_client, &first_reg, 1);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (send first register address): %d\n",
+ err);
+ goto get_reg_page_out_unlock;
+ } else if (err != 1) {
+ dev_err(ab3100->dev,
+ "write error (send first register address)\n"
+ " %d bytes transferred (expected 1)\n",
+ err);
+ err = -EIO;
+ goto get_reg_page_out_unlock;
+ }
+
+ err = i2c_master_recv(ab3100->i2c_client, regvals, numregs);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (read register page): %d\n",
+ err);
+ goto get_reg_page_out_unlock;
+ } else if (err != numregs) {
+ dev_err(ab3100->dev,
+ "write error (read register page)\n"
+ " %d bytes transferred (expected %d)\n",
+ err, numregs);
+ err = -EIO;
+ goto get_reg_page_out_unlock;
+ }
+
+ /* All is well */
+ err = 0;
+
+ get_reg_page_out_unlock:
+ mutex_unlock(&ab3100->access_mutex);
+ return err;
+}
+
+static int get_register_page_interruptible(struct device *dev, u8 bank,
+ u8 first_reg, u8 *regvals, u8 numregs)
+{
+ struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
+
+ return ab3100_get_register_page_interruptible(ab3100,
+ first_reg, regvals, numregs);
+}
+
+static int ab3100_mask_and_set_register_interruptible(struct ab3100 *ab3100,
+ u8 reg, u8 andmask, u8 ormask)
+{
+ u8 regandval[2] = {reg, 0};
+ int err;
+
+ err = mutex_lock_interruptible(&ab3100->access_mutex);
+ if (err)
+ return err;
+
+ /* First read out the target register */
+ err = i2c_master_send(ab3100->i2c_client, ®, 1);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (maskset send address): %d\n",
+ err);
+ goto get_maskset_unlock;
+ } else if (err != 1) {
+ dev_err(ab3100->dev,
+ "write error (maskset send address)\n"
+ " %d bytes transferred (expected 1)\n",
+ err);
+ err = -EIO;
+ goto get_maskset_unlock;
+ }
+
+ err = i2c_master_recv(ab3100->i2c_client, ®andval[1], 1);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (maskset read register): %d\n",
+ err);
+ goto get_maskset_unlock;
+ } else if (err != 1) {
+ dev_err(ab3100->dev,
+ "write error (maskset read register)\n"
+ " %d bytes transferred (expected 1)\n",
+ err);
+ err = -EIO;
+ goto get_maskset_unlock;
+ }
+
+ /* Modify the register */
+ regandval[1] &= andmask;
+ regandval[1] |= ormask;
+
+ /* Write the register */
+ err = i2c_master_send(ab3100->i2c_client, regandval, 2);
+ if (err < 0) {
+ dev_err(ab3100->dev,
+ "write error (write register): %d\n",
+ err);
+ goto get_maskset_unlock;
+ } else if (err != 2) {
+ dev_err(ab3100->dev,
+ "write error (write register)\n"
+ " %d bytes transferred (expected 2)\n",
+ err);
+ err = -EIO;
+ goto get_maskset_unlock;
+ }
+
+ /* All is well */
+ err = 0;
+
+ get_maskset_unlock:
+ mutex_unlock(&ab3100->access_mutex);
+ return err;
+}
+
+static int mask_and_set_register_interruptible(struct device *dev, u8 bank,
+ u8 reg, u8 bitmask, u8 bitvalues)
+{
+ struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
+
+ return ab3100_mask_and_set_register_interruptible(ab3100,
+ reg, bitmask, (bitmask & bitvalues));
+}
+
+/*
+ * Register a simple callback for handling any AB3100 events.
+ */
+int ab3100_event_register(struct ab3100 *ab3100,
+ struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&ab3100->event_subscribers,
+ nb);
+}
+EXPORT_SYMBOL(ab3100_event_register);
+
+/*
+ * Remove a previously registered callback.
+ */
+int ab3100_event_unregister(struct ab3100 *ab3100,
+ struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&ab3100->event_subscribers,
+ nb);
+}
+EXPORT_SYMBOL(ab3100_event_unregister);
+
+
+static int ab3100_event_registers_startup_state_get(struct device *dev,
+ u8 *event)
+{
+ struct ab3100 *ab3100 = dev_get_drvdata(dev->parent);
+ if (!ab3100->startup_events_read)
+ return -EAGAIN; /* Try again later */
+ memcpy(event, ab3100->startup_events, 3);
+ return 0;
+}
+
+static struct abx500_ops ab3100_ops = {
+ .get_chip_id = ab3100_get_chip_id,
+ .set_register = set_register_interruptible,
+ .get_register = get_register_interruptible,
+ .get_register_page = get_register_page_interruptible,
+ .set_register_page = NULL,
+ .mask_and_set_register = mask_and_set_register_interruptible,
+ .event_registers_startup_state_get =
+ ab3100_event_registers_startup_state_get,
+ .startup_irq_enabled = NULL,
+};
+
+/*
+ * This is a threaded interrupt handler so we can make some
+ * I2C calls etc.
+ */
+static irqreturn_t ab3100_irq_handler(int irq, void *data)
+{
+ struct ab3100 *ab3100 = data;
+ u8 event_regs[3];
+ u32 fatevent;
+ int err;
+
+ err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1,
+ event_regs, 3);
+ if (err)
+ goto err_event;
+
+ fatevent = (event_regs[0] << 16) |
+ (event_regs[1] << 8) |
+ event_regs[2];
+
+ if (!ab3100->startup_events_read) {
+ ab3100->startup_events[0] = event_regs[0];
+ ab3100->startup_events[1] = event_regs[1];
+ ab3100->startup_events[2] = event_regs[2];
+ ab3100->startup_events_read = true;
+ }
+ /*
+ * The notified parties will have to mask out the events
+ * they're interested in and react to them. They will be
+ * notified on all events, then they use the fatevent value
+ * to determine if they're interested.
+ */
+ blocking_notifier_call_chain(&ab3100->event_subscribers,
+ fatevent, NULL);
+
+ dev_dbg(ab3100->dev,
+ "IRQ Event: 0x%08x\n", fatevent);
+
+ return IRQ_HANDLED;
+
+ err_event:
+ dev_dbg(ab3100->dev,
+ "error reading event status\n");
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_DEBUG_FS
+/*
+ * Some debugfs entries only exposed if we're using debug
+ */
+static int ab3100_registers_print(struct seq_file *s, void *p)
+{
+ struct ab3100 *ab3100 = s->private;
+ u8 value;
+ u8 reg;
+
+ seq_puts(s, "AB3100 registers:\n");
+
+ for (reg = 0; reg < 0xff; reg++) {
+ ab3100_get_register_interruptible(ab3100, reg, &value);
+ seq_printf(s, "[0x%x]: 0x%x\n", reg, value);
+ }
+ return 0;
+}
+
+static int ab3100_registers_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, ab3100_registers_print, inode->i_private);
+}
+
+static const struct file_operations ab3100_registers_fops = {
+ .open = ab3100_registers_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
+
+struct ab3100_get_set_reg_priv {
+ struct ab3100 *ab3100;
+ bool mode;
+};
+
+static ssize_t ab3100_get_set_reg(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ab3100_get_set_reg_priv *priv = file->private_data;
+ struct ab3100 *ab3100 = priv->ab3100;
+ char buf[32];
+ ssize_t buf_size;
+ int regp;
+ u8 user_reg;
+ int err;
+ int i = 0;
+
+ /* Get userspace string and assure termination */
+ buf_size = min(count, (sizeof(buf)-1));
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+ buf[buf_size] = 0;
+
+ /*
+ * The idea is here to parse a string which is either
+ * "0xnn" for reading a register, or "0xaa 0xbb" for
+ * writing 0xbb to the register 0xaa. First move past
+ * whitespace and then begin to parse the register.
+ */
+ while ((i < buf_size) && (buf[i] == ' '))
+ i++;
+ regp = i;
+
+ /*
+ * Advance pointer to end of string then terminate
+ * the register string. This is needed to satisfy
+ * the kstrtou8() function.
+ */
+ while ((i < buf_size) && (buf[i] != ' '))
+ i++;
+ buf[i] = '\0';
+
+ err = kstrtou8(&buf[regp], 16, &user_reg);
+ if (err)
+ return err;
+
+ /* Either we read or we write a register here */
+ if (!priv->mode) {
+ /* Reading */
+ u8 regvalue;
+
+ ab3100_get_register_interruptible(ab3100, user_reg, ®value);
+
+ dev_info(ab3100->dev,
+ "debug read AB3100 reg[0x%02x]: 0x%02x\n",
+ user_reg, regvalue);
+ } else {
+ int valp;
+ u8 user_value;
+ u8 regvalue;
+
+ /*
+ * Writing, we need some value to write to
+ * the register so keep parsing the string
+ * from userspace.
+ */
+ i++;
+ while ((i < buf_size) && (buf[i] == ' '))
+ i++;
+ valp = i;
+ while ((i < buf_size) && (buf[i] != ' '))
+ i++;
+ buf[i] = '\0';
+
+ err = kstrtou8(&buf[valp], 16, &user_value);
+ if (err)
+ return err;
+
+ ab3100_set_register_interruptible(ab3100, user_reg, user_value);
+ ab3100_get_register_interruptible(ab3100, user_reg, ®value);
+
+ dev_info(ab3100->dev,
+ "debug write reg[0x%02x]\n"
+ " with 0x%02x, after readback: 0x%02x\n",
+ user_reg, user_value, regvalue);
+ }
+ return buf_size;
+}
+
+static const struct file_operations ab3100_get_set_reg_fops = {
+ .open = simple_open,
+ .write = ab3100_get_set_reg,
+ .llseek = noop_llseek,
+};
+
+static struct dentry *ab3100_dir;
+static struct dentry *ab3100_reg_file;
+static struct ab3100_get_set_reg_priv ab3100_get_priv;
+static struct dentry *ab3100_get_reg_file;
+static struct ab3100_get_set_reg_priv ab3100_set_priv;
+static struct dentry *ab3100_set_reg_file;
+
+static void ab3100_setup_debugfs(struct ab3100 *ab3100)
+{
+ int err;
+
+ ab3100_dir = debugfs_create_dir("ab3100", NULL);
+ if (!ab3100_dir)
+ goto exit_no_debugfs;
+
+ ab3100_reg_file = debugfs_create_file("registers",
+ S_IRUGO, ab3100_dir, ab3100,
+ &ab3100_registers_fops);
+ if (!ab3100_reg_file) {
+ err = -ENOMEM;
+ goto exit_destroy_dir;
+ }
+
+ ab3100_get_priv.ab3100 = ab3100;
+ ab3100_get_priv.mode = false;
+ ab3100_get_reg_file = debugfs_create_file("get_reg",
+ S_IWUSR, ab3100_dir, &ab3100_get_priv,
+ &ab3100_get_set_reg_fops);
+ if (!ab3100_get_reg_file) {
+ err = -ENOMEM;
+ goto exit_destroy_reg;
+ }
+
+ ab3100_set_priv.ab3100 = ab3100;
+ ab3100_set_priv.mode = true;
+ ab3100_set_reg_file = debugfs_create_file("set_reg",
+ S_IWUSR, ab3100_dir, &ab3100_set_priv,
+ &ab3100_get_set_reg_fops);
+ if (!ab3100_set_reg_file) {
+ err = -ENOMEM;
+ goto exit_destroy_get_reg;
+ }
+ return;
+
+ exit_destroy_get_reg:
+ debugfs_remove(ab3100_get_reg_file);
+ exit_destroy_reg:
+ debugfs_remove(ab3100_reg_file);
+ exit_destroy_dir:
+ debugfs_remove(ab3100_dir);
+ exit_no_debugfs:
+ return;
+}
+static inline void ab3100_remove_debugfs(void)
+{
+ debugfs_remove(ab3100_set_reg_file);
+ debugfs_remove(ab3100_get_reg_file);
+ debugfs_remove(ab3100_reg_file);
+ debugfs_remove(ab3100_dir);
+}
+#else
+static inline void ab3100_setup_debugfs(struct ab3100 *ab3100)
+{
+}
+static inline void ab3100_remove_debugfs(void)
+{
+}
+#endif
+
+/*
+ * Basic set-up, datastructure creation/destruction and I2C interface.
+ * This sets up a default config in the AB3100 chip so that it
+ * will work as expected.
+ */
+
+struct ab3100_init_setting {
+ u8 abreg;
+ u8 setting;
+};
+
+static const struct ab3100_init_setting ab3100_init_settings[] = {
+ {
+ .abreg = AB3100_MCA,
+ .setting = 0x01
+ }, {
+ .abreg = AB3100_MCB,
+ .setting = 0x30
+ }, {
+ .abreg = AB3100_IMRA1,
+ .setting = 0x00
+ }, {
+ .abreg = AB3100_IMRA2,
+ .setting = 0xFF
+ }, {
+ .abreg = AB3100_IMRA3,
+ .setting = 0x01
+ }, {
+ .abreg = AB3100_IMRB1,
+ .setting = 0xBF
+ }, {
+ .abreg = AB3100_IMRB2,
+ .setting = 0xFF
+ }, {
+ .abreg = AB3100_IMRB3,
+ .setting = 0xFF
+ }, {
+ .abreg = AB3100_SUP,
+ .setting = 0x00
+ }, {
+ .abreg = AB3100_DIS,
+ .setting = 0xF0
+ }, {
+ .abreg = AB3100_D0C,
+ .setting = 0x00
+ }, {
+ .abreg = AB3100_D1C,
+ .setting = 0x00
+ }, {
+ .abreg = AB3100_D2C,
+ .setting = 0x00
+ }, {
+ .abreg = AB3100_D3C,
+ .setting = 0x00
+ },
+};
+
+static int ab3100_setup(struct ab3100 *ab3100)
+{
+ int err = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ab3100_init_settings); i++) {
+ err = ab3100_set_register_interruptible(ab3100,
+ ab3100_init_settings[i].abreg,
+ ab3100_init_settings[i].setting);
+ if (err)
+ goto exit_no_setup;
+ }
+
+ /*
+ * Special trick to make the AB3100 use the 32kHz clock (RTC)
+ * bit 3 in test register 0x02 is a special, undocumented test
+ * register bit that only exist in AB3100 P1E
+ */
+ if (ab3100->chip_id == 0xc4) {
+ dev_warn(ab3100->dev,
+ "AB3100 P1E variant detected forcing chip to 32KHz\n");
+ err = ab3100_set_test_register_interruptible(ab3100,
+ 0x02, 0x08);
+ }
+
+ exit_no_setup:
+ return err;
+}
+
+/* The subdevices of the AB3100 */
+static struct mfd_cell ab3100_devs[] = {
+ {
+ .name = "ab3100-dac",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-leds",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-power",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-regulators",
+ .of_compatible = "stericsson,ab3100-regulators",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-sim",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-uart",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-rtc",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-charger",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-boost",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-adc",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-fuelgauge",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-vibrator",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-otp",
+ .id = -1,
+ },
+ {
+ .name = "ab3100-codec",
+ .id = -1,
+ },
+};
+
+struct ab_family_id {
+ u8 id;
+ char *name;
+};
+
+static const struct ab_family_id ids[] = {
+ /* AB3100 */
+ {
+ .id = 0xc0,
+ .name = "P1A"
+ }, {
+ .id = 0xc1,
+ .name = "P1B"
+ }, {
+ .id = 0xc2,
+ .name = "P1C"
+ }, {
+ .id = 0xc3,
+ .name = "P1D"
+ }, {
+ .id = 0xc4,
+ .name = "P1E"
+ }, {
+ .id = 0xc5,
+ .name = "P1F/R1A"
+ }, {
+ .id = 0xc6,
+ .name = "P1G/R1A"
+ }, {
+ .id = 0xc7,
+ .name = "P2A/R2A"
+ }, {
+ .id = 0xc8,
+ .name = "P2B/R2B"
+ },
+ /* AB3000 variants, not supported */
+ {
+ .id = 0xa0
+ }, {
+ .id = 0xa1
+ }, {
+ .id = 0xa2
+ }, {
+ .id = 0xa3
+ }, {
+ .id = 0xa4
+ }, {
+ .id = 0xa5
+ }, {
+ .id = 0xa6
+ }, {
+ .id = 0xa7
+ },
+ /* Terminator */
+ {
+ .id = 0x00,
+ },
+};
+
+static int ab3100_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ab3100 *ab3100;
+ struct ab3100_platform_data *ab3100_plf_data =
+ dev_get_platdata(&client->dev);
+ int err;
+ int i;
+
+ ab3100 = devm_kzalloc(&client->dev, sizeof(struct ab3100), GFP_KERNEL);
+ if (!ab3100) {
+ dev_err(&client->dev, "could not allocate AB3100 device\n");
+ return -ENOMEM;
+ }
+
+ /* Initialize data structure */
+ mutex_init(&ab3100->access_mutex);
+ BLOCKING_INIT_NOTIFIER_HEAD(&ab3100->event_subscribers);
+
+ ab3100->i2c_client = client;
+ ab3100->dev = &ab3100->i2c_client->dev;
+
+ i2c_set_clientdata(client, ab3100);
+
+ /* Read chip ID register */
+ err = ab3100_get_register_interruptible(ab3100, AB3100_CID,
+ &ab3100->chip_id);
+ if (err) {
+ dev_err(&client->dev,
+ "failed to communicate with AB3100 chip\n");
+ goto exit_no_detect;
+ }
+
+ for (i = 0; ids[i].id != 0x0; i++) {
+ if (ids[i].id == ab3100->chip_id) {
+ if (ids[i].name != NULL) {
+ snprintf(&ab3100->chip_name[0],
+ sizeof(ab3100->chip_name) - 1,
+ "AB3100 %s",
+ ids[i].name);
+ break;
+ } else {
+ dev_err(&client->dev,
+ "AB3000 is not supported\n");
+ goto exit_no_detect;
+ }
+ }
+ }
+
+ if (ids[i].id == 0x0) {
+ dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n",
+ ab3100->chip_id);
+ dev_err(&client->dev,
+ "accepting it anyway. Please update the driver.\n");
+ goto exit_no_detect;
+ }
+
+ dev_info(&client->dev, "Detected chip: %s\n",
+ &ab3100->chip_name[0]);
+
+ /* Attach a second dummy i2c_client to the test register address */
+ ab3100->testreg_client = i2c_new_dummy(client->adapter,
+ client->addr + 1);
+ if (!ab3100->testreg_client) {
+ err = -ENOMEM;
+ goto exit_no_testreg_client;
+ }
+
+ err = ab3100_setup(ab3100);
+ if (err)
+ goto exit_no_setup;
+
+ err = devm_request_threaded_irq(&client->dev,
+ client->irq, NULL, ab3100_irq_handler,
+ IRQF_ONESHOT, "ab3100-core", ab3100);
+ if (err)
+ goto exit_no_irq;
+
+ err = abx500_register_ops(&client->dev, &ab3100_ops);
+ if (err)
+ goto exit_no_ops;
+
+ /* Set up and register the platform devices. */
+ for (i = 0; i < ARRAY_SIZE(ab3100_devs); i++) {
+ ab3100_devs[i].platform_data = ab3100_plf_data;
+ ab3100_devs[i].pdata_size = sizeof(struct ab3100_platform_data);
+ }
+
+ err = mfd_add_devices(&client->dev, 0, ab3100_devs,
+ ARRAY_SIZE(ab3100_devs), NULL, 0, NULL);
+
+ ab3100_setup_debugfs(ab3100);
+
+ return 0;
+
+ exit_no_ops:
+ exit_no_irq:
+ exit_no_setup:
+ i2c_unregister_device(ab3100->testreg_client);
+ exit_no_testreg_client:
+ exit_no_detect:
+ return err;
+}
+
+static int ab3100_remove(struct i2c_client *client)
+{
+ struct ab3100 *ab3100 = i2c_get_clientdata(client);
+
+ /* Unregister subdevices */
+ mfd_remove_devices(&client->dev);
+ ab3100_remove_debugfs();
+ i2c_unregister_device(ab3100->testreg_client);
+ return 0;
+}
+
+static const struct i2c_device_id ab3100_id[] = {
+ { "ab3100", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ab3100_id);
+
+static struct i2c_driver ab3100_driver = {
+ .driver = {
+ .name = "ab3100",
+ .owner = THIS_MODULE,
+ },
+ .id_table = ab3100_id,
+ .probe = ab3100_probe,
+ .remove = ab3100_remove,
+};
+
+static int __init ab3100_i2c_init(void)
+{
+ return i2c_add_driver(&ab3100_driver);
+}
+
+static void __exit ab3100_i2c_exit(void)
+{
+ i2c_del_driver(&ab3100_driver);
+}
+
+subsys_initcall(ab3100_i2c_init);
+module_exit(ab3100_i2c_exit);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
+MODULE_DESCRIPTION("AB3100 core driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff