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path: root/drivers/mfd/ab3100-otp.c
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Diffstat (limited to 'drivers/mfd/ab3100-otp.c')
-rw-r--r--drivers/mfd/ab3100-otp.c240
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");