Initial Contribution
msm-2.6.38: tag AU_LINUX_ANDROID_GINGERBREAD.02.03.04.00.142
Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
diff --git a/drivers/misc/pmic8058-nfc.c b/drivers/misc/pmic8058-nfc.c
new file mode 100644
index 0000000..76a19f4
--- /dev/null
+++ b/drivers/misc/pmic8058-nfc.c
@@ -0,0 +1,322 @@
+/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+/*
+ * Qualcomm PMIC8058 NFC driver
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/mfd/pmic8058.h>
+#include <linux/pmic8058-nfc.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+
+/* PMIC8058 NFC */
+#define SSBI_REG_NFC_CTRL 0x14D
+#define SSBI_REG_NFC_TEST 0x14E
+
+/* NFC_CTRL */
+#define PM8058_NFC_SUPPORT_EN 0x80
+#define PM8058_NFC_LDO_EN 0x40
+#define PM8058_NFC_EN 0x20
+#define PM8058_NFC_EXT_VDDLDO_EN 0x10
+#define PM8058_NFC_VPH_PWR_EN 0x08
+#define PM8058_NFC_RESERVED 0x04
+#define PM8058_NFC_VDDLDO_LEVEL 0x03
+
+/* NFC_TEST */
+#define PM8058_NFC_VDDLDO_MON_EN 0x80
+#define PM8058_NFC_ATEST_EN 0x40
+#define PM8058_NFC_DTEST1_EN 0x20
+#define PM8058_NFC_RESERVED2 0x18
+#define PM8058_NFC_VDDLDO_OK_S 0x04
+#define PM8058_NFC_MBG_EN_S 0x02
+#define PM8058_NFC_EXT_EN_S 0x01
+
+struct pm8058_nfc_device {
+ struct mutex nfc_mutex;
+ struct pm8058_chip *pm_chip;
+#if defined(CONFIG_DEBUG_FS)
+ struct dentry *dent;
+#endif
+};
+static struct pm8058_nfc_device *nfc_dev;
+
+/* APIs */
+/*
+ * pm8058_nfc_request - request a handle to access NFC device
+ */
+struct pm8058_nfc_device *pm8058_nfc_request(void)
+{
+ return nfc_dev;
+}
+EXPORT_SYMBOL(pm8058_nfc_request);
+
+/*
+ * pm8058_nfc_config - configure NFC signals
+ *
+ * @nfcdev: the NFC device
+ * @mask: signal mask to configure
+ * @flags: control flags
+ */
+int pm8058_nfc_config(struct pm8058_nfc_device *nfcdev, u32 mask, u32 flags)
+{
+ u8 nfc_ctrl, nfc_test, m, f;
+ int rc;
+
+ if (nfcdev == NULL || IS_ERR(nfcdev) || !mask)
+ return -EINVAL;
+ if (nfcdev->pm_chip == NULL)
+ return -ENODEV;
+
+ mutex_lock(&nfcdev->nfc_mutex);
+
+ if (!(mask & PM_NFC_CTRL_REQ))
+ goto config_test;
+
+ rc = pm8058_read(nfcdev->pm_chip, SSBI_REG_NFC_CTRL, &nfc_ctrl, 1);
+ if (rc) {
+ pr_err("%s: FAIL pm8058_read(): rc=%d (nfc_ctrl=0x%x)\n",
+ __func__, rc, nfc_ctrl);
+ goto config_done;
+ }
+
+ m = mask & 0x00ff;
+ f = flags & 0x00ff;
+ nfc_ctrl &= ~m;
+ nfc_ctrl |= m & f;
+
+ rc = pm8058_write(nfcdev->pm_chip, SSBI_REG_NFC_CTRL, &nfc_ctrl, 1);
+ if (rc) {
+ pr_err("%s: FAIL pm8058_write(): rc=%d (nfc_ctrl=0x%x)\n",
+ __func__, rc, nfc_ctrl);
+ goto config_done;
+ }
+
+config_test:
+ if (!(mask & PM_NFC_TEST_REQ))
+ goto config_done;
+
+ rc = pm8058_read(nfcdev->pm_chip, SSBI_REG_NFC_TEST, &nfc_test, 1);
+ if (rc) {
+ pr_err("%s: FAIL pm8058_read(): rc=%d (nfc_test=0x%x)\n",
+ __func__, rc, nfc_test);
+ goto config_done;
+ }
+
+ m = (mask >> 8) & 0x00ff;
+ f = (flags >> 8) & 0x00ff;
+ nfc_test &= ~m;
+ nfc_test |= m & f;
+
+ rc = pm8058_write(nfcdev->pm_chip, SSBI_REG_NFC_TEST, &nfc_test, 1);
+ if (rc) {
+ pr_err("%s: FAIL pm8058_write(): rc=%d (nfc_test=0x%x)\n",
+ __func__, rc, nfc_test);
+ goto config_done;
+ }
+
+config_done:
+ mutex_unlock(&nfcdev->nfc_mutex);
+ return 0;
+}
+EXPORT_SYMBOL(pm8058_nfc_config);
+
+/*
+ * pm8058_nfc_get_status - get NFC status
+ *
+ * @nfcdev: the NFC device
+ * @mask: of status mask to read
+ * @status: pointer to the status variable
+ */
+int pm8058_nfc_get_status(struct pm8058_nfc_device *nfcdev,
+ u32 mask, u32 *status)
+{
+ u8 nfc_ctrl, nfc_test;
+ u32 st;
+ int rc;
+
+ if (nfcdev == NULL || IS_ERR(nfcdev) || status == NULL)
+ return -EINVAL;
+ if (nfcdev->pm_chip == NULL)
+ return -ENODEV;
+
+ st = 0;
+ mutex_lock(&nfcdev->nfc_mutex);
+
+ if (!(mask & PM_NFC_CTRL_REQ))
+ goto read_test;
+
+ rc = pm8058_read(nfcdev->pm_chip, SSBI_REG_NFC_CTRL, &nfc_ctrl, 1);
+ if (rc) {
+ pr_err("%s: FAIL pm8058_read(): rc=%d (nfc_ctrl=0x%x)\n",
+ __func__, rc, nfc_ctrl);
+ goto get_status_done;
+ }
+
+read_test:
+ if (!(mask & (PM_NFC_TEST_REQ | PM_NFC_TEST_STATUS)))
+ goto get_status_done;
+
+ rc = pm8058_read(nfcdev->pm_chip, SSBI_REG_NFC_TEST, &nfc_test, 1);
+ if (rc)
+ pr_err("%s: FAIL pm8058_read(): rc=%d (nfc_test=0x%x)\n",
+ __func__, rc, nfc_test);
+
+get_status_done:
+ st = nfc_ctrl;
+ st |= nfc_test << 8;
+ *status = st;
+
+ mutex_unlock(&nfcdev->nfc_mutex);
+ return 0;
+}
+EXPORT_SYMBOL(pm8058_nfc_get_status);
+
+/*
+ * pm8058_nfc_free - free the NFC device
+ */
+void pm8058_nfc_free(struct pm8058_nfc_device *nfcdev)
+{
+ /* Disable all signals */
+ pm8058_nfc_config(nfcdev, PM_NFC_CTRL_REQ, 0);
+}
+EXPORT_SYMBOL(pm8058_nfc_free);
+
+#if defined(CONFIG_DEBUG_FS)
+static int pm8058_nfc_debug_set(void *data, u64 val)
+{
+ struct pm8058_nfc_device *nfcdev;
+ u32 mask, control;
+ int rc;
+
+ nfcdev = (struct pm8058_nfc_device *)data;
+ control = (u32)val & 0xffff;
+ mask = ((u32)val >> 16) & 0xffff;
+ rc = pm8058_nfc_config(nfcdev, mask, control);
+ if (rc)
+ pr_err("%s: ERR pm8058_nfc_config: rc=%d, "
+ "[mask, control]=[0x%x, 0x%x]\n",
+ __func__, rc, mask, control);
+
+ return 0;
+}
+
+static int pm8058_nfc_debug_get(void *data, u64 *val)
+{
+ struct pm8058_nfc_device *nfcdev;
+ u32 status;
+ int rc;
+
+ nfcdev = (struct pm8058_nfc_device *)data;
+ rc = pm8058_nfc_get_status(nfcdev, (u32)-1, &status);
+ if (rc)
+ pr_err("%s: ERR pm8058_nfc_get_status: rc=%d, status=0x%x\n",
+ __func__, rc, status);
+
+ if (val)
+ *val = (u64)status;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(pm8058_nfc_fops, pm8058_nfc_debug_get,
+ pm8058_nfc_debug_set, "%llu\n");
+
+static int pm8058_nfc_debug_init(struct pm8058_nfc_device *nfcdev)
+{
+ struct dentry *dent;
+
+ dent = debugfs_create_file("pm8058-nfc", 0644, NULL,
+ (void *)nfcdev, &pm8058_nfc_fops);
+
+ if (dent == NULL || IS_ERR(dent))
+ pr_err("%s: ERR debugfs_create_file: dent=0x%x\n",
+ __func__, (unsigned)dent);
+
+ nfcdev->dent = dent;
+ return 0;
+}
+#endif
+
+static int __devinit pmic8058_nfc_probe(struct platform_device *pdev)
+{
+ struct pm8058_chip *pm_chip;
+ struct pm8058_nfc_device *nfcdev;
+
+ pm_chip = dev_get_drvdata(pdev->dev.parent);
+ if (pm_chip == NULL) {
+ pr_err("%s: no parent data passed in.\n", __func__);
+ return -EFAULT;
+ }
+
+ nfcdev = kzalloc(sizeof *nfcdev, GFP_KERNEL);
+ if (nfcdev == NULL) {
+ pr_err("%s: kzalloc() failed.\n", __func__);
+ return -ENOMEM;
+ }
+
+ mutex_init(&nfcdev->nfc_mutex);
+
+ nfcdev->pm_chip = pm_chip;
+ nfc_dev = nfcdev;
+ platform_set_drvdata(pdev, nfcdev);
+
+#if defined(CONFIG_DEBUG_FS)
+ pm8058_nfc_debug_init(nfc_dev);
+#endif
+
+ pr_notice("%s: OK\n", __func__);
+ return 0;
+}
+
+static int __devexit pmic8058_nfc_remove(struct platform_device *pdev)
+{
+ struct pm8058_nfc_device *nfcdev = platform_get_drvdata(pdev);
+
+#if defined(CONFIG_DEBUG_FS)
+ debugfs_remove(nfcdev->dent);
+#endif
+
+ platform_set_drvdata(pdev, nfcdev->pm_chip);
+ kfree(nfcdev);
+ return 0;
+}
+
+static struct platform_driver pmic8058_nfc_driver = {
+ .probe = pmic8058_nfc_probe,
+ .remove = __devexit_p(pmic8058_nfc_remove),
+ .driver = {
+ .name = "pm8058-nfc",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init pm8058_nfc_init(void)
+{
+ return platform_driver_register(&pmic8058_nfc_driver);
+}
+
+static void __exit pm8058_nfc_exit(void)
+{
+ platform_driver_unregister(&pmic8058_nfc_driver);
+}
+
+module_init(pm8058_nfc_init);
+module_exit(pm8058_nfc_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("PMIC8058 NFC driver");
+MODULE_VERSION("1.0");
+MODULE_ALIAS("platform:pmic8058-nfc");