| /* |
| * Copyright (C) 2007-2009 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/err.h> |
| #include <linux/platform_device.h> |
| #include <linux/device.h> |
| #include <linux/interrupt.h> |
| #include <linux/debugfs.h> |
| #include <linux/seq_file.h> |
| #include <linux/uaccess.h> |
| #include <linux/mfd/ab3100.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 unsigned short normal_i2c[] = { 0x48, I2C_CLIENT_END }; |
| I2C_CLIENT_INSMOD_1(ab3100); |
| |
| u8 ab3100_get_chip_type(struct ab3100 *ab3100) |
| { |
| u8 chip = ABUNKNOWN; |
| |
| switch (ab3100->chip_id & 0xf0) { |
| case 0xa0: |
| chip = AB3000; |
| break; |
| case 0xc0: |
| chip = AB3100; |
| break; |
| } |
| return chip; |
| } |
| EXPORT_SYMBOL(ab3100_get_chip_type); |
| |
| 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) " |
| "%d bytes transferred (expected 2)\n", |
| err); |
| err = -EIO; |
| } else { |
| /* All is well */ |
| err = 0; |
| } |
| mutex_unlock(&ab3100->access_mutex); |
| return err; |
| } |
| EXPORT_SYMBOL(ab3100_set_register_interruptible); |
| |
| |
| /* |
| * 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) " |
| "%d bytes transferred (expected 2)\n", |
| err); |
| err = -EIO; |
| } else { |
| /* All is well */ |
| err = 0; |
| } |
| mutex_unlock(&ab3100->access_mutex); |
| |
| return err; |
| } |
| |
| |
| 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) " |
| "%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) " |
| "%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; |
| } |
| EXPORT_SYMBOL(ab3100_get_register_interruptible); |
| |
| |
| 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) " |
| "%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) " |
| "%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; |
| } |
| EXPORT_SYMBOL(ab3100_get_register_page_interruptible); |
| |
| |
| 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) " |
| "%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) " |
| "%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) " |
| "%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; |
| } |
| EXPORT_SYMBOL(ab3100_mask_and_set_register_interruptible); |
| |
| |
| /* |
| * 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); |
| |
| |
| int ab3100_event_registers_startup_state_get(struct ab3100 *ab3100, |
| u32 *fatevent) |
| { |
| if (!ab3100->startup_events_read) |
| return -EAGAIN; /* Try again later */ |
| *fatevent = ab3100->startup_events; |
| return 0; |
| } |
| EXPORT_SYMBOL(ab3100_event_registers_startup_state_get); |
| |
| /* Interrupt handling worker */ |
| static void ab3100_work(struct work_struct *work) |
| { |
| struct ab3100 *ab3100 = container_of(work, struct ab3100, work); |
| 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_wq; |
| |
| fatevent = (event_regs[0] << 16) | |
| (event_regs[1] << 8) | |
| event_regs[2]; |
| |
| if (!ab3100->startup_events_read) { |
| ab3100->startup_events = fatevent; |
| 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); |
| |
| /* By now the IRQ should be acked and deasserted so enable it again */ |
| enable_irq(ab3100->i2c_client->irq); |
| return; |
| |
| err_event_wq: |
| dev_dbg(ab3100->dev, |
| "error in event workqueue\n"); |
| /* Enable the IRQ anyway, what choice do we have? */ |
| enable_irq(ab3100->i2c_client->irq); |
| return; |
| } |
| |
| static irqreturn_t ab3100_irq_handler(int irq, void *data) |
| { |
| struct ab3100 *ab3100 = data; |
| /* |
| * Disable the IRQ and dispatch a worker to handle the |
| * event. Since the chip resides on I2C this is slow |
| * stuff and we will re-enable the interrupts once th |
| * worker has finished. |
| */ |
| disable_irq_nosync(irq); |
| schedule_work(&ab3100->work); |
| 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_printf(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 int ab3100_get_set_reg_open_file(struct inode *inode, struct file *file) |
| { |
| file->private_data = inode->i_private; |
| return 0; |
| } |
| |
| 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; |
| unsigned long 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 strict_strtoul() function. |
| */ |
| while ((i < buf_size) && (buf[i] != ' ')) |
| i++; |
| buf[i] = '\0'; |
| |
| err = strict_strtoul(&buf[regp], 16, &user_reg); |
| if (err) |
| return err; |
| if (user_reg > 0xff) |
| return -EINVAL; |
| |
| /* Either we read or we write a register here */ |
| if (!priv->mode) { |
| /* Reading */ |
| u8 reg = (u8) user_reg; |
| u8 regvalue; |
| |
| ab3100_get_register_interruptible(ab3100, reg, ®value); |
| |
| dev_info(ab3100->dev, |
| "debug read AB3100 reg[0x%02x]: 0x%02x\n", |
| reg, regvalue); |
| } else { |
| int valp; |
| unsigned long user_value; |
| u8 reg = (u8) user_reg; |
| u8 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 = strict_strtoul(&buf[valp], 16, &user_value); |
| if (err) |
| return err; |
| if (user_reg > 0xff) |
| return -EINVAL; |
| |
| value = (u8) user_value; |
| ab3100_set_register_interruptible(ab3100, reg, value); |
| ab3100_get_register_interruptible(ab3100, reg, ®value); |
| |
| dev_info(ab3100->dev, |
| "debug write reg[0x%02x] with 0x%02x, " |
| "after readback: 0x%02x\n", |
| reg, value, regvalue); |
| } |
| return buf_size; |
| } |
| |
| static const struct file_operations ab3100_get_set_reg_fops = { |
| .open = ab3100_get_set_reg_open_file, |
| .write = ab3100_get_set_reg, |
| }; |
| |
| 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_IWUGO, 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_IWUGO, 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 __initdata |
| 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 __init 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; |
| } |
| |
| /* |
| * Here we define all the platform devices that appear |
| * as children of the AB3100. These are regular platform |
| * devices with the IORESOURCE_IO .start and .end set |
| * to correspond to the internal AB3100 register range |
| * mapping to the corresponding subdevice. |
| */ |
| |
| #define AB3100_DEVICE(devname, devid) \ |
| static struct platform_device ab3100_##devname##_device = { \ |
| .name = devid, \ |
| .id = -1, \ |
| } |
| |
| /* |
| * This lists all the subdevices and corresponding register |
| * ranges. |
| */ |
| AB3100_DEVICE(dac, "ab3100-dac"); |
| AB3100_DEVICE(leds, "ab3100-leds"); |
| AB3100_DEVICE(power, "ab3100-power"); |
| AB3100_DEVICE(regulators, "ab3100-regulators"); |
| AB3100_DEVICE(sim, "ab3100-sim"); |
| AB3100_DEVICE(uart, "ab3100-uart"); |
| AB3100_DEVICE(rtc, "ab3100-rtc"); |
| AB3100_DEVICE(charger, "ab3100-charger"); |
| AB3100_DEVICE(boost, "ab3100-boost"); |
| AB3100_DEVICE(adc, "ab3100-adc"); |
| AB3100_DEVICE(fuelgauge, "ab3100-fuelgauge"); |
| AB3100_DEVICE(vibrator, "ab3100-vibrator"); |
| AB3100_DEVICE(otp, "ab3100-otp"); |
| AB3100_DEVICE(codec, "ab3100-codec"); |
| |
| static struct platform_device * |
| ab3100_platform_devs[] = { |
| &ab3100_dac_device, |
| &ab3100_leds_device, |
| &ab3100_power_device, |
| &ab3100_regulators_device, |
| &ab3100_sim_device, |
| &ab3100_uart_device, |
| &ab3100_rtc_device, |
| &ab3100_charger_device, |
| &ab3100_boost_device, |
| &ab3100_adc_device, |
| &ab3100_fuelgauge_device, |
| &ab3100_vibrator_device, |
| &ab3100_otp_device, |
| &ab3100_codec_device, |
| }; |
| |
| struct ab_family_id { |
| u8 id; |
| char *name; |
| }; |
| |
| static const struct ab_family_id ids[] __initdata = { |
| /* 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 __init ab3100_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct ab3100 *ab3100; |
| int err; |
| int i; |
| |
| ab3100 = kzalloc(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, |
| "could not communicate with the AB3100 analog " |
| "baseband 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; |
| } |
| |
| strlcpy(ab3100->testreg_client->name, id->name, |
| sizeof(ab3100->testreg_client->name)); |
| |
| err = ab3100_setup(ab3100); |
| if (err) |
| goto exit_no_setup; |
| |
| INIT_WORK(&ab3100->work, ab3100_work); |
| |
| /* This real unpredictable IRQ is of course sampled for entropy */ |
| err = request_irq(client->irq, ab3100_irq_handler, |
| IRQF_DISABLED | IRQF_SAMPLE_RANDOM, |
| "AB3100 IRQ", ab3100); |
| if (err) |
| goto exit_no_irq; |
| |
| /* Set parent and a pointer back to the container in device data */ |
| for (i = 0; i < ARRAY_SIZE(ab3100_platform_devs); i++) { |
| ab3100_platform_devs[i]->dev.parent = |
| &client->dev; |
| platform_set_drvdata(ab3100_platform_devs[i], ab3100); |
| } |
| |
| /* Register the platform devices */ |
| platform_add_devices(ab3100_platform_devs, |
| ARRAY_SIZE(ab3100_platform_devs)); |
| |
| ab3100_setup_debugfs(ab3100); |
| |
| return 0; |
| |
| exit_no_irq: |
| exit_no_setup: |
| i2c_unregister_device(ab3100->testreg_client); |
| exit_no_testreg_client: |
| exit_no_detect: |
| kfree(ab3100); |
| return err; |
| } |
| |
| static int __exit ab3100_remove(struct i2c_client *client) |
| { |
| struct ab3100 *ab3100 = i2c_get_clientdata(client); |
| int i; |
| |
| /* Unregister subdevices */ |
| for (i = 0; i < ARRAY_SIZE(ab3100_platform_devs); i++) |
| platform_device_unregister(ab3100_platform_devs[i]); |
| |
| ab3100_remove_debugfs(); |
| i2c_unregister_device(ab3100->testreg_client); |
| |
| /* |
| * At this point, all subscribers should have unregistered |
| * their notifiers so deactivate IRQ |
| */ |
| free_irq(client->irq, ab3100); |
| kfree(ab3100); |
| return 0; |
| } |
| |
| static const struct i2c_device_id ab3100_id[] = { |
| { "ab3100", ab3100 }, |
| { } |
| }; |
| 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 = __exit_p(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"); |