diff options
Diffstat (limited to 'drivers/mfd/ab3100-otp.c')
| -rw-r--r-- | drivers/mfd/ab3100-otp.c | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/drivers/mfd/ab3100-otp.c b/drivers/mfd/ab3100-otp.c deleted file mode 100644 index c393102e3a39..000000000000 --- a/drivers/mfd/ab3100-otp.c +++ /dev/null @@ -1,240 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * drivers/mfd/ab3100_otp.c - * - * Copyright (C) 2007-2009 ST-Ericsson AB - * Driver to read out OTP from the AB3100 Mixed-signal circuit - * Author: Linus Walleij <linus.walleij@stericsson.com> - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/mfd/abx500.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -/* The OTP registers */ -#define AB3100_OTP0 0xb0 -#define AB3100_OTP1 0xb1 -#define AB3100_OTP2 0xb2 -#define AB3100_OTP3 0xb3 -#define AB3100_OTP4 0xb4 -#define AB3100_OTP5 0xb5 -#define AB3100_OTP6 0xb6 -#define AB3100_OTP7 0xb7 -#define AB3100_OTPP 0xbf - -/** - * struct ab3100_otp - * @dev: containing device - * @locked: whether the OTP is locked, after locking, no more bits - * can be changed but before locking it is still possible - * to change bits from 1->0. - * @freq: clocking frequency for the OTP, this frequency is either - * 32768Hz or 1MHz/30 - * @paf: product activation flag, indicates whether this is a real - * product (paf true) or a lab board etc (paf false) - * @imeich: if this is set it is possible to override the - * IMEI number found in the tac, fac and svn fields with - * (secured) software - * @cid: customer ID - * @tac: type allocation code of the IMEI - * @fac: final assembly code of the IMEI - * @svn: software version number of the IMEI - * @debugfs: a debugfs file used when dumping to file - */ -struct ab3100_otp { - struct device *dev; - bool locked; - u32 freq; - bool paf; - bool imeich; - u16 cid:14; - u32 tac:20; - u8 fac; - u32 svn:20; - struct dentry *debugfs; -}; - -static int __init ab3100_otp_read(struct ab3100_otp *otp) -{ - u8 otpval[8]; - u8 otpp; - int err; - - err = abx500_get_register_interruptible(otp->dev, 0, - AB3100_OTPP, &otpp); - if (err) { - dev_err(otp->dev, "unable to read OTPP register\n"); - return err; - } - - err = abx500_get_register_page_interruptible(otp->dev, 0, - AB3100_OTP0, otpval, 8); - if (err) { - dev_err(otp->dev, "unable to read OTP register page\n"); - return err; - } - - /* Cache OTP properties, they never change by nature */ - otp->locked = (otpp & 0x80); - otp->freq = (otpp & 0x40) ? 32768 : 34100; - otp->paf = (otpval[1] & 0x80); - otp->imeich = (otpval[1] & 0x40); - otp->cid = ((otpval[1] << 8) | otpval[0]) & 0x3fff; - otp->tac = ((otpval[4] & 0x0f) << 16) | (otpval[3] << 8) | otpval[2]; - otp->fac = ((otpval[5] & 0x0f) << 4) | (otpval[4] >> 4); - otp->svn = (otpval[7] << 12) | (otpval[6] << 4) | (otpval[5] >> 4); - return 0; -} - -/* - * This is a simple debugfs human-readable file that dumps out - * the contents of the OTP. - */ -#ifdef CONFIG_DEBUG_FS -static int ab3100_show_otp(struct seq_file *s, void *v) -{ - struct ab3100_otp *otp = s->private; - - seq_printf(s, "OTP is %s\n", otp->locked ? "LOCKED" : "UNLOCKED"); - seq_printf(s, "OTP clock switch startup is %uHz\n", otp->freq); - seq_printf(s, "PAF is %s\n", otp->paf ? "SET" : "NOT SET"); - seq_printf(s, "IMEI is %s\n", otp->imeich ? - "CHANGEABLE" : "NOT CHANGEABLE"); - seq_printf(s, "CID: 0x%04x (decimal: %d)\n", otp->cid, otp->cid); - seq_printf(s, "IMEI: %u-%u-%u\n", otp->tac, otp->fac, otp->svn); - return 0; -} - -static int ab3100_otp_open(struct inode *inode, struct file *file) -{ - return single_open(file, ab3100_show_otp, inode->i_private); -} - -static const struct file_operations ab3100_otp_operations = { - .open = ab3100_otp_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static void __init ab3100_otp_init_debugfs(struct device *dev, - struct ab3100_otp *otp) -{ - otp->debugfs = debugfs_create_file("ab3100_otp", S_IFREG | S_IRUGO, - NULL, otp, &ab3100_otp_operations); -} - -static void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp) -{ - debugfs_remove(otp->debugfs); -} -#else -/* Compile this out if debugfs not selected */ -static inline void __init ab3100_otp_init_debugfs(struct device *dev, - struct ab3100_otp *otp) -{ -} - -static inline void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp) -{ -} -#endif - -#define SHOW_AB3100_ATTR(name) \ -static ssize_t ab3100_otp_##name##_show(struct device *dev, \ - struct device_attribute *attr, \ - char *buf) \ -{\ - struct ab3100_otp *otp = dev_get_drvdata(dev); \ - return sprintf(buf, "%u\n", otp->name); \ -} - -SHOW_AB3100_ATTR(locked) -SHOW_AB3100_ATTR(freq) -SHOW_AB3100_ATTR(paf) -SHOW_AB3100_ATTR(imeich) -SHOW_AB3100_ATTR(cid) -SHOW_AB3100_ATTR(fac) -SHOW_AB3100_ATTR(tac) -SHOW_AB3100_ATTR(svn) - -static struct device_attribute ab3100_otp_attrs[] = { - __ATTR(locked, S_IRUGO, ab3100_otp_locked_show, NULL), - __ATTR(freq, S_IRUGO, ab3100_otp_freq_show, NULL), - __ATTR(paf, S_IRUGO, ab3100_otp_paf_show, NULL), - __ATTR(imeich, S_IRUGO, ab3100_otp_imeich_show, NULL), - __ATTR(cid, S_IRUGO, ab3100_otp_cid_show, NULL), - __ATTR(fac, S_IRUGO, ab3100_otp_fac_show, NULL), - __ATTR(tac, S_IRUGO, ab3100_otp_tac_show, NULL), - __ATTR(svn, S_IRUGO, ab3100_otp_svn_show, NULL), -}; - -static int __init ab3100_otp_probe(struct platform_device *pdev) -{ - struct ab3100_otp *otp; - int err = 0; - int i; - - otp = devm_kzalloc(&pdev->dev, sizeof(struct ab3100_otp), GFP_KERNEL); - if (!otp) - return -ENOMEM; - - otp->dev = &pdev->dev; - - /* Replace platform data coming in with a local struct */ - platform_set_drvdata(pdev, otp); - - err = ab3100_otp_read(otp); - if (err) - return err; - - dev_info(&pdev->dev, "AB3100 OTP readout registered\n"); - - /* sysfs entries */ - for (i = 0; i < ARRAY_SIZE(ab3100_otp_attrs); i++) { - err = device_create_file(&pdev->dev, - &ab3100_otp_attrs[i]); - if (err) - goto err; - } - - /* debugfs entries */ - ab3100_otp_init_debugfs(&pdev->dev, otp); - - return 0; - -err: - while (--i >= 0) - device_remove_file(&pdev->dev, &ab3100_otp_attrs[i]); - return err; -} - -static int __exit ab3100_otp_remove(struct platform_device *pdev) -{ - struct ab3100_otp *otp = platform_get_drvdata(pdev); - int i; - - for (i = 0; i < ARRAY_SIZE(ab3100_otp_attrs); i++) - device_remove_file(&pdev->dev, - &ab3100_otp_attrs[i]); - ab3100_otp_exit_debugfs(otp); - return 0; -} - -static struct platform_driver ab3100_otp_driver = { - .driver = { - .name = "ab3100-otp", - }, - .remove = __exit_p(ab3100_otp_remove), -}; - -module_platform_driver_probe(ab3100_otp_driver, ab3100_otp_probe); - -MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); -MODULE_DESCRIPTION("AB3100 OTP Readout Driver"); -MODULE_LICENSE("GPL"); |