Merge "NFC: Detection of NQ chip set and firmware version"

drivers/nfc/nq-nci.c

@@ -53,6 +53,7 @@ struct nqx_dev {
 	struct	mutex		read_mutex;
 	struct	i2c_client	*client;
 	struct	miscdevice	nqx_device;
+	union  nqx_uinfo	nqx_info;
 	/* NFC GPIO variables */
 	unsigned int		irq_gpio;
 	unsigned int		en_gpio;
@@ -467,6 +468,25 @@ int nfc_ioctl_core_reset_ntf(struct file *filp)
 	return nqx_dev->core_reset_ntf;
 }
 
+/*
+ * Inside nfc_ioctl_nfcc_info
+ *
+ * @brief   nfc_ioctl_nfcc_info
+ *
+ * Check the NQ Chipset and firmware version details
+ */
+unsigned int nfc_ioctl_nfcc_info(struct file *filp, unsigned long arg)
+{
+	unsigned int r = 0;
+	struct nqx_dev *nqx_dev = filp->private_data;
+
+	r = nqx_dev->nqx_info.i;
+	dev_dbg(&nqx_dev->client->dev,
+		"nqx nfc : nfc_ioctl_nfcc_info r = %d\n", r);
+
+	return r;
+}
+
 static long nfc_ioctl(struct file *pfile, unsigned int cmd,
 			unsigned long arg)
 {
@@ -489,6 +509,9 @@ static long nfc_ioctl(struct file *pfile, unsigned int cmd,
 	case NFCC_INITIAL_CORE_RESET_NTF:
 		r = nfc_ioctl_core_reset_ntf(pfile);
 		break;
+	case NFCC_GET_INFO:
+		r = nfc_ioctl_nfcc_info(pfile, arg);
+		break;
 	default:
 		r = -ENOIOCTLCMD;
 	}
@@ -508,13 +531,16 @@ static const struct file_operations nfc_dev_fops = {
 };
 
 /* Check for availability of NQ_ NFC controller hardware */
-static int nfcc_hw_check(struct i2c_client *client, unsigned int enable_gpio)
+static int nfcc_hw_check(struct i2c_client *client, struct nqx_dev *nqx_dev)
 {
 	int ret = 0;
 
 	unsigned char raw_nci_reset_cmd[] =  {0x20, 0x00, 0x01, 0x00};
+	unsigned char raw_nci_init_cmd[] =   {0x20, 0x01, 0x00};
+	unsigned char nci_init_rsp[28];
 	unsigned char nci_reset_rsp[6];
-
+	unsigned char init_rsp_len = 0;
+	unsigned int enable_gpio = nqx_dev->en_gpio;
 	/* making sure that the NFCC starts in a clean state. */
 	gpio_set_value(enable_gpio, 0);/* ULPM: Disable */
 	/* hardware dependent delay */
@@ -546,6 +572,65 @@ static int nfcc_hw_check(struct i2c_client *client, unsigned int enable_gpio)
 		"%s: - i2c_master_recv Error\n", __func__);
 		goto err_nfcc_hw_check;
 	}
+	ret = i2c_master_send(client, raw_nci_init_cmd,
+		sizeof(raw_nci_init_cmd));
+	if (ret < 0) {
+		dev_err(&client->dev,
+		"%s: - i2c_master_send Error\n", __func__);
+		goto err_nfcc_hw_check;
+	}
+	/* hardware dependent delay */
+	msleep(30);
+	/* Read Response of INIT command */
+	ret = i2c_master_recv(client, nci_init_rsp,
+		sizeof(nci_init_rsp));
+	if (ret < 0) {
+		dev_err(&client->dev,
+		"%s: - i2c_master_recv Error\n", __func__);
+		goto err_nfcc_hw_check;
+	}
+	init_rsp_len = 2 + nci_init_rsp[2]; /*payload + len*/
+	if (init_rsp_len > PAYLOAD_HEADER_LENGTH) {
+		nqx_dev->nqx_info.info.chip_type =
+				nci_init_rsp[init_rsp_len - 3];
+		nqx_dev->nqx_info.info.rom_version =
+				nci_init_rsp[init_rsp_len - 2];
+		nqx_dev->nqx_info.info.fw_major =
+				nci_init_rsp[init_rsp_len - 1];
+		nqx_dev->nqx_info.info.fw_minor =
+				nci_init_rsp[init_rsp_len];
+	}
+	dev_dbg(&nqx_dev->client->dev, "NQ NFCC chip_type = %x\n",
+		nqx_dev->nqx_info.info.chip_type);
+	dev_dbg(&nqx_dev->client->dev, "NQ fw version = %x.%x.%x\n",
+		nqx_dev->nqx_info.info.rom_version,
+		nqx_dev->nqx_info.info.fw_major,
+		nqx_dev->nqx_info.info.fw_minor);
+
+	switch (nqx_dev->nqx_info.info.chip_type) {
+	case NFCC_NQ_210:
+		dev_dbg(&client->dev,
+		"%s: ## NFCC == NQ210 ##\n", __func__);
+		break;
+	case NFCC_NQ_220:
+		dev_dbg(&client->dev,
+		"%s: ## NFCC == NQ220 ##\n", __func__);
+		break;
+	case NFCC_NQ_310:
+		dev_dbg(&client->dev,
+		"%s: ## NFCC == NQ310 ##\n", __func__);
+		break;
+	case NFCC_NQ_330:
+		dev_dbg(&client->dev,
+		"%s: ## NFCC == NQ330 ##\n", __func__);
+		break;
+	default:
+		dev_err(&client->dev,
+		"%s: - NFCC HW not Supported\n", __func__);
+		break;
+	}
+
+	/*Disable NFC by default to save power on boot*/
 	gpio_set_value(enable_gpio, 0);/* ULPM: Disable */
 	ret = 0;
 	goto done;
@@ -566,9 +651,7 @@ done:
 static int nqx_clock_select(struct nqx_dev *nqx_dev)
 {
 	int r = 0;
-
+	nqx_dev->s_clk = clk_get(&nqx_dev->client->dev, "ref_clk");
-	nqx_dev->s_clk =
-			clk_get(&nqx_dev->client->dev, "ref_clk");
 
 	if (nqx_dev->s_clk == NULL)
 		goto err_clk;
@@ -867,8 +950,7 @@ static int nqx_probe(struct i2c_client *client,
 	 * present before attempting further hardware initialisation.
 	 *
 	 */
-
+	r = nfcc_hw_check(client, nqx_dev);
-	r = nfcc_hw_check(client, platform_data->en_gpio);
 	if (r) {
 		/* make sure NFCC is not enabled */
 		gpio_set_value(platform_data->en_gpio, 0);

drivers/nfc/nq-nci.h

@@ -22,6 +22,7 @@
 
 #include <linux/ioctl.h>
 #include <linux/miscdevice.h>
+#include <linux/nfcinfo.h>
 
 #define NFC_SET_PWR			_IOW(0xE9, 0x01, unsigned int)
 #define ESE_SET_PWR			_IOW(0xE9, 0x02, unsigned int)
@@ -42,4 +43,12 @@ enum nfcc_initial_core_reset_ntf {
 	DEFAULT_INITIAL_CORE_RESET_NTF, /*2*/
 };
 
+enum nfcc_chip_variant {
+	NFCC_NQ_210			= 0x48,	/**< NFCC NQ210 */
+	NFCC_NQ_220			= 0x58,	/**< NFCC NQ220 */
+	NFCC_NQ_310			= 0x40,	/**< NFCC NQ310 */
+	NFCC_NQ_330			= 0x51,	/**< NFCC NQ330 */
+	NFCC_NOT_SUPPORTED	        = 0xFF	/**< NFCC is not supported */
+};
+
 #endif

include/linux/nfcinfo.h

@@ -0,0 +1,6 @@
+#ifndef _NFCINFO_H
+#define _NFCINFO_H
+
+#include <uapi/linux/nfc/nfcinfo.h>
+
+#endif

include/uapi/linux/Kbuild

@@ -23,6 +23,7 @@ header-y += netfilter_ipv6/
 header-y += usb/
 header-y += wimax/
 header-y += mfd/
+header-y += nfc/
 
 genhdr-y += version.h
 

include/uapi/linux/nfc/Kbuild

@@ -0,0 +1,2 @@
+#UAPI export list
+header-y += nfcinfo.h

include/uapi/linux/nfc/nfcinfo.h

@@ -0,0 +1,21 @@
+#ifndef _UAPI_NFCINFO_H_
+#define _UAPI_NFCINFO_H_
+
+#include <linux/ioctl.h>
+
+#define NFCC_MAGIC 0xE9
+#define NFCC_GET_INFO _IOW(NFCC_MAGIC, 0x09, unsigned int)
+
+struct nqx_devinfo {
+	unsigned char chip_type;
+	unsigned char rom_version;
+	unsigned char fw_major;
+	unsigned char fw_minor;
+};
+
+union nqx_uinfo {
+	unsigned int i;
+	struct nqx_devinfo info;
+};
+
+#endif