1 #include <scsi/scsi.h> 2 #include <scsi/scsi_host.h> 3 #include <scsi/scsi_cmnd.h> 4 #include <scsi/scsi_device.h> 5 #include <linux/usb.h> 6 #include <linux/module.h> 7 #include <linux/slab.h> 8 9 #include "usb.h" 10 #include "transport.h" 11 #include "protocol.h" 12 #include "scsiglue.h" 13 #include "sierra_ms.h" 14 #include "debug.h" 15 16 #define SWIMS_USB_REQUEST_SetSwocMode 0x0B 17 #define SWIMS_USB_REQUEST_GetSwocInfo 0x0A 18 #define SWIMS_USB_INDEX_SetMode 0x0000 19 #define SWIMS_SET_MODE_Modem 0x0001 20 21 #define TRU_NORMAL 0x01 22 #define TRU_FORCE_MS 0x02 23 #define TRU_FORCE_MODEM 0x03 24 25 static unsigned int swi_tru_install = 1; 26 module_param(swi_tru_install, uint, S_IRUGO | S_IWUSR); 27 MODULE_PARM_DESC(swi_tru_install, "TRU-Install mode (1=Full Logic (def)," 28 " 2=Force CD-Rom, 3=Force Modem)"); 29 30 struct swoc_info { 31 __u8 rev; 32 __u8 reserved[8]; 33 __u16 LinuxSKU; 34 __u16 LinuxVer; 35 __u8 reserved2[47]; 36 } __attribute__((__packed__)); 37 38 static bool containsFullLinuxPackage(struct swoc_info *swocInfo) 39 { 40 if ((swocInfo->LinuxSKU >= 0x2100 && swocInfo->LinuxSKU <= 0x2FFF) || 41 (swocInfo->LinuxSKU >= 0x7100 && swocInfo->LinuxSKU <= 0x7FFF)) 42 return true; 43 else 44 return false; 45 } 46 47 static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode) 48 { 49 int result; 50 dev_dbg(&udev->dev, "SWIMS: %s", "DEVICE MODE SWITCH\n"); 51 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 52 SWIMS_USB_REQUEST_SetSwocMode, /* __u8 request */ 53 USB_TYPE_VENDOR | USB_DIR_OUT, /* __u8 request type */ 54 eSWocMode, /* __u16 value */ 55 0x0000, /* __u16 index */ 56 NULL, /* void *data */ 57 0, /* __u16 size */ 58 USB_CTRL_SET_TIMEOUT); /* int timeout */ 59 return result; 60 } 61 62 63 static int sierra_get_swoc_info(struct usb_device *udev, 64 struct swoc_info *swocInfo) 65 { 66 int result; 67 68 dev_dbg(&udev->dev, "SWIMS: Attempting to get TRU-Install info\n"); 69 70 result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 71 SWIMS_USB_REQUEST_GetSwocInfo, /* __u8 request */ 72 USB_TYPE_VENDOR | USB_DIR_IN, /* __u8 request type */ 73 0, /* __u16 value */ 74 0, /* __u16 index */ 75 (void *) swocInfo, /* void *data */ 76 sizeof(struct swoc_info), /* __u16 size */ 77 USB_CTRL_SET_TIMEOUT); /* int timeout */ 78 79 swocInfo->LinuxSKU = le16_to_cpu(swocInfo->LinuxSKU); 80 swocInfo->LinuxVer = le16_to_cpu(swocInfo->LinuxVer); 81 return result; 82 } 83 84 static void debug_swoc(const struct device *dev, struct swoc_info *swocInfo) 85 { 86 dev_dbg(dev, "SWIMS: SWoC Rev: %02d\n", swocInfo->rev); 87 dev_dbg(dev, "SWIMS: Linux SKU: %04X\n", swocInfo->LinuxSKU); 88 dev_dbg(dev, "SWIMS: Linux Version: %04X\n", swocInfo->LinuxVer); 89 } 90 91 92 static ssize_t show_truinst(struct device *dev, struct device_attribute *attr, 93 char *buf) 94 { 95 struct swoc_info *swocInfo; 96 struct usb_interface *intf = to_usb_interface(dev); 97 struct usb_device *udev = interface_to_usbdev(intf); 98 int result; 99 if (swi_tru_install == TRU_FORCE_MS) { 100 result = snprintf(buf, PAGE_SIZE, "Forced Mass Storage\n"); 101 } else { 102 swocInfo = kmalloc(sizeof(struct swoc_info), GFP_KERNEL); 103 if (!swocInfo) { 104 snprintf(buf, PAGE_SIZE, "Error\n"); 105 return -ENOMEM; 106 } 107 result = sierra_get_swoc_info(udev, swocInfo); 108 if (result < 0) { 109 dev_dbg(dev, "SWIMS: failed SWoC query\n"); 110 kfree(swocInfo); 111 snprintf(buf, PAGE_SIZE, "Error\n"); 112 return -EIO; 113 } 114 debug_swoc(dev, swocInfo); 115 result = snprintf(buf, PAGE_SIZE, 116 "REV=%02d SKU=%04X VER=%04X\n", 117 swocInfo->rev, 118 swocInfo->LinuxSKU, 119 swocInfo->LinuxVer); 120 kfree(swocInfo); 121 } 122 return result; 123 } 124 static DEVICE_ATTR(truinst, S_IRUGO, show_truinst, NULL); 125 126 int sierra_ms_init(struct us_data *us) 127 { 128 int result, retries; 129 struct swoc_info *swocInfo; 130 struct usb_device *udev; 131 struct Scsi_Host *sh; 132 133 retries = 3; 134 result = 0; 135 udev = us->pusb_dev; 136 137 sh = us_to_host(us); 138 scsi_get_host_dev(sh); 139 140 /* Force Modem mode */ 141 if (swi_tru_install == TRU_FORCE_MODEM) { 142 usb_stor_dbg(us, "SWIMS: Forcing Modem Mode\n"); 143 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem); 144 if (result < 0) 145 usb_stor_dbg(us, "SWIMS: Failed to switch to modem mode\n"); 146 return -EIO; 147 } 148 /* Force Mass Storage mode (keep CD-Rom) */ 149 else if (swi_tru_install == TRU_FORCE_MS) { 150 usb_stor_dbg(us, "SWIMS: Forcing Mass Storage Mode\n"); 151 goto complete; 152 } 153 /* Normal TRU-Install Logic */ 154 else { 155 usb_stor_dbg(us, "SWIMS: Normal SWoC Logic\n"); 156 157 swocInfo = kmalloc(sizeof(struct swoc_info), 158 GFP_KERNEL); 159 if (!swocInfo) 160 return -ENOMEM; 161 162 retries = 3; 163 do { 164 retries--; 165 result = sierra_get_swoc_info(udev, swocInfo); 166 if (result < 0) { 167 usb_stor_dbg(us, "SWIMS: Failed SWoC query\n"); 168 schedule_timeout_uninterruptible(2*HZ); 169 } 170 } while (retries && result < 0); 171 172 if (result < 0) { 173 usb_stor_dbg(us, "SWIMS: Completely failed SWoC query\n"); 174 kfree(swocInfo); 175 return -EIO; 176 } 177 178 debug_swoc(&us->pusb_dev->dev, swocInfo); 179 180 /* 181 * If there is not Linux software on the TRU-Install device 182 * then switch to modem mode 183 */ 184 if (!containsFullLinuxPackage(swocInfo)) { 185 usb_stor_dbg(us, "SWIMS: Switching to Modem Mode\n"); 186 result = sierra_set_ms_mode(udev, 187 SWIMS_SET_MODE_Modem); 188 if (result < 0) 189 usb_stor_dbg(us, "SWIMS: Failed to switch modem\n"); 190 kfree(swocInfo); 191 return -EIO; 192 } 193 kfree(swocInfo); 194 } 195 complete: 196 result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst); 197 198 return 0; 199 } 200 201