Fixed MTP to work with TWRP

2025-09-08 17:18:05 -04:00 · 2018-06-19 23:16:04 +02:00 · 2018-06-19 23:16:04 +02:00 · f6dfaef42e
commit f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
--- a/drivers/usb/storage/sierra_ms.c
+++ b/drivers/usb/storage/sierra_ms.c
@ -0,0 +1,199 @@
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <linux/usb.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "protocol.h"
+#include "scsiglue.h"
+#include "sierra_ms.h"
+#include "debug.h"
+
+#define SWIMS_USB_REQUEST_SetSwocMode	0x0B
+#define SWIMS_USB_REQUEST_GetSwocInfo	0x0A
+#define SWIMS_USB_INDEX_SetMode		0x0000
+#define SWIMS_SET_MODE_Modem		0x0001
+
+#define TRU_NORMAL 			0x01
+#define TRU_FORCE_MS 			0x02
+#define TRU_FORCE_MODEM 		0x03
+
+static unsigned int swi_tru_install = 1;
+module_param(swi_tru_install, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(swi_tru_install, "TRU-Install mode (1=Full Logic (def),"
+		 " 2=Force CD-Rom, 3=Force Modem)");
+
+struct swoc_info {
+	__u8 rev;
+	__u8 reserved[8];
+	__u16 LinuxSKU;
+	__u16 LinuxVer;
+	__u8 reserved2[47];
+} __attribute__((__packed__));
+
+static bool containsFullLinuxPackage(struct swoc_info *swocInfo)
+{
+	if ((swocInfo->LinuxSKU >= 0x2100 && swocInfo->LinuxSKU <= 0x2FFF) ||
+	   (swocInfo->LinuxSKU >= 0x7100 && swocInfo->LinuxSKU <= 0x7FFF))
+		return true;
+	else
+		return false;
+}
+
+static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
+{
+	int result;
+	dev_dbg(&udev->dev, "SWIMS: %s", "DEVICE MODE SWITCH\n");
+	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			SWIMS_USB_REQUEST_SetSwocMode,	/* __u8 request      */
+			USB_TYPE_VENDOR | USB_DIR_OUT,	/* __u8 request type */
+			eSWocMode,			/* __u16 value       */
+			0x0000,				/* __u16 index       */
+			NULL,				/* void *data        */
+			0,				/* __u16 size 	     */
+			USB_CTRL_SET_TIMEOUT);		/* int timeout       */
+	return result;
+}
+
+
+static int sierra_get_swoc_info(struct usb_device *udev,
+				struct swoc_info *swocInfo)
+{
+	int result;
+
+	dev_dbg(&udev->dev, "SWIMS: Attempting to get TRU-Install info\n");
+
+	result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			SWIMS_USB_REQUEST_GetSwocInfo,	/* __u8 request      */
+			USB_TYPE_VENDOR | USB_DIR_IN,	/* __u8 request type */
+			0,				/* __u16 value       */
+			0,				/* __u16 index       */
+			(void *) swocInfo,		/* void *data        */
+			sizeof(struct swoc_info),	/* __u16 size 	     */
+			USB_CTRL_SET_TIMEOUT);		/* int timeout 	     */
+
+	swocInfo->LinuxSKU = le16_to_cpu(swocInfo->LinuxSKU);
+	swocInfo->LinuxVer = le16_to_cpu(swocInfo->LinuxVer);
+	return result;
+}
+
+static void debug_swoc(const struct device *dev, struct swoc_info *swocInfo)
+{
+	dev_dbg(dev, "SWIMS: SWoC Rev: %02d\n", swocInfo->rev);
+	dev_dbg(dev, "SWIMS: Linux SKU: %04X\n", swocInfo->LinuxSKU);
+	dev_dbg(dev, "SWIMS: Linux Version: %04X\n", swocInfo->LinuxVer);
+}
+
+
+static ssize_t show_truinst(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct swoc_info *swocInfo;
+	struct usb_interface *intf = to_usb_interface(dev);
+	struct usb_device *udev = interface_to_usbdev(intf);
+	int result;
+	if (swi_tru_install == TRU_FORCE_MS) {
+		result = snprintf(buf, PAGE_SIZE, "Forced Mass Storage\n");
+	} else {
+		swocInfo = kmalloc(sizeof(struct swoc_info), GFP_KERNEL);
+		if (!swocInfo) {
+			snprintf(buf, PAGE_SIZE, "Error\n");
+			return -ENOMEM;
+		}
+		result = sierra_get_swoc_info(udev, swocInfo);
+		if (result < 0) {
+			dev_dbg(dev, "SWIMS: failed SWoC query\n");
+			kfree(swocInfo);
+			snprintf(buf, PAGE_SIZE, "Error\n");
+			return -EIO;
+		}
+		debug_swoc(dev, swocInfo);
+		result = snprintf(buf, PAGE_SIZE,
+			"REV=%02d SKU=%04X VER=%04X\n",
+			swocInfo->rev,
+			swocInfo->LinuxSKU,
+			swocInfo->LinuxVer);
+		kfree(swocInfo);
+	}
+	return result;
+}
+static DEVICE_ATTR(truinst, S_IRUGO, show_truinst, NULL);
+
+int sierra_ms_init(struct us_data *us)
+{
+	int result, retries;
+	struct swoc_info *swocInfo;
+	struct usb_device *udev;
+	struct Scsi_Host *sh;
+
+	retries = 3;
+	result = 0;
+	udev = us->pusb_dev;
+
+	sh = us_to_host(us);
+	scsi_get_host_dev(sh);
+
+	/* Force Modem mode */
+	if (swi_tru_install == TRU_FORCE_MODEM) {
+		usb_stor_dbg(us, "SWIMS: Forcing Modem Mode\n");
+		result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
+		if (result < 0)
+			usb_stor_dbg(us, "SWIMS: Failed to switch to modem mode\n");
+		return -EIO;
+	}
+	/* Force Mass Storage mode (keep CD-Rom) */
+	else if (swi_tru_install == TRU_FORCE_MS) {
+		usb_stor_dbg(us, "SWIMS: Forcing Mass Storage Mode\n");
+		goto complete;
+	}
+	/* Normal TRU-Install Logic */
+	else {
+		usb_stor_dbg(us, "SWIMS: Normal SWoC Logic\n");
+
+		swocInfo = kmalloc(sizeof(struct swoc_info),
+				GFP_KERNEL);
+		if (!swocInfo)
+			return -ENOMEM;
+
+		retries = 3;
+		do {
+			retries--;
+			result = sierra_get_swoc_info(udev, swocInfo);
+			if (result < 0) {
+				usb_stor_dbg(us, "SWIMS: Failed SWoC query\n");
+				schedule_timeout_uninterruptible(2*HZ);
+			}
+		} while (retries && result < 0);
+
+		if (result < 0) {
+			usb_stor_dbg(us, "SWIMS: Completely failed SWoC query\n");
+			kfree(swocInfo);
+			return -EIO;
+		}
+
+		debug_swoc(&us->pusb_dev->dev, swocInfo);
+
+		/* If there is not Linux software on the TRU-Install device
+		 * then switch to modem mode
+		 */
+		if (!containsFullLinuxPackage(swocInfo)) {
+			usb_stor_dbg(us, "SWIMS: Switching to Modem Mode\n");
+			result = sierra_set_ms_mode(udev,
+				SWIMS_SET_MODE_Modem);
+			if (result < 0)
+				usb_stor_dbg(us, "SWIMS: Failed to switch modem\n");
+			kfree(swocInfo);
+			return -EIO;
+		}
+		kfree(swocInfo);
+	}
+complete:
+	result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
+
+	return 0;
+}
+