[linux.git] / drivers / usb / storage / sierra_ms.c

#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/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;
	US_DEBUGP("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;

	US_DEBUGP("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(struct swoc_info *swocInfo)
{
	US_DEBUGP("SWIMS: SWoC Rev: %02d \n", swocInfo->rev);
	US_DEBUGP("SWIMS: Linux SKU: %04X \n", swocInfo->LinuxSKU);
	US_DEBUGP("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) {
			US_DEBUGP("SWIMS: Allocation failure\n");
			snprintf(buf, PAGE_SIZE, "Error\n");
			return -ENOMEM;
		}
		result = sierra_get_swoc_info(udev, swocInfo);
		if (result < 0) {
			US_DEBUGP("SWIMS: failed SWoC query\n");
			kfree(swocInfo);
			snprintf(buf, PAGE_SIZE, "Error\n");
			return -EIO;
		}
		debug_swoc(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_IWUGO | S_IRUGO, show_truinst, NULL);

int sierra_ms_init(struct us_data *us)
{
	int result, retries;
	signed long delay_t;
	struct swoc_info *swocInfo;
	struct usb_device *udev;
	struct Scsi_Host *sh;
	struct scsi_device *sd;

	delay_t = 2;
	retries = 3;
	result = 0;
	udev = us->pusb_dev;

	sh = us_to_host(us);
	sd = scsi_get_host_dev(sh);

	US_DEBUGP("SWIMS: sierra_ms_init called\n");

	/* Force Modem mode */
	if (swi_tru_install == TRU_FORCE_MODEM) {
		US_DEBUGP("SWIMS: %s", "Forcing Modem Mode\n");
		result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
		if (result < 0)
			US_DEBUGP("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) {
		US_DEBUGP("SWIMS: %s", "Forcing Mass Storage Mode\n");
		goto complete;
	}
	/* Normal TRU-Install Logic */
	else {
		US_DEBUGP("SWIMS: %s", "Normal SWoC Logic\n");

		swocInfo = kmalloc(sizeof(struct swoc_info),
				GFP_KERNEL);
		if (!swocInfo) {
			US_DEBUGP("SWIMS: %s", "Allocation failure\n");
			return -ENOMEM;
		}

		retries = 3;
		do {
			retries--;
			result = sierra_get_swoc_info(udev, swocInfo);
			if (result < 0) {
				US_DEBUGP("SWIMS: %s", "Failed SWoC query\n");
				schedule_timeout_uninterruptible(2*HZ);
			}
		} while (retries && result < 0);

		if (result < 0) {
			US_DEBUGP("SWIMS: %s",
				  "Completely failed SWoC query\n");
			kfree(swocInfo);
			return -EIO;
		}

		debug_swoc(swocInfo);

		/* If there is not Linux software on the TRU-Install device
		 * then switch to modem mode
		 */
		if (!containsFullLinuxPackage(swocInfo)) {
			US_DEBUGP("SWIMS: %s",
				"Switching to Modem Mode\n");
			result = sierra_set_ms_mode(udev,
				SWIMS_SET_MODE_Modem);
			if (result < 0)
				US_DEBUGP("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;
}
Commit	Line	Data
32fe5e39 KL	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>
5a0e3ad6	6	#include <linux/slab.h>
32fe5e39 KL	7
	8	#include "usb.h"
	9	#include "transport.h"
	10	#include "protocol.h"
	11	#include "scsiglue.h"
	12	#include "sierra_ms.h"
	13	#include "debug.h"
	14
	15	#define SWIMS_USB_REQUEST_SetSwocMode 0x0B
	16	#define SWIMS_USB_REQUEST_GetSwocInfo 0x0A
	17	#define SWIMS_USB_INDEX_SetMode 0x0000
	18	#define SWIMS_SET_MODE_Modem 0x0001
	19
	20	#define TRU_NORMAL 0x01
	21	#define TRU_FORCE_MS 0x02
	22	#define TRU_FORCE_MODEM 0x03
	23
	24	static unsigned int swi_tru_install = 1;
	25	module_param(swi_tru_install, uint, S_IRUGO \| S_IWUSR);
	26	MODULE_PARM_DESC(swi_tru_install, "TRU-Install mode (1=Full Logic (def),"
	27	" 2=Force CD-Rom, 3=Force Modem)");
	28
	29	struct swoc_info {
	30	__u8 rev;
	31	__u8 reserved[8];
	32	__u16 LinuxSKU;
	33	__u16 LinuxVer;
	34	__u8 reserved2[47];
	35	} __attribute__((__packed__));
	36
	37	static bool containsFullLinuxPackage(struct swoc_info *swocInfo)
	38	{
	39	if ((swocInfo->LinuxSKU >= 0x2100 && swocInfo->LinuxSKU <= 0x2FFF) \|\|
	40	(swocInfo->LinuxSKU >= 0x7100 && swocInfo->LinuxSKU <= 0x7FFF))
	41	return true;
	42	else
	43	return false;
	44	}
	45
	46	static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
	47	{
	48	int result;
	49	US_DEBUGP("SWIMS: %s", "DEVICE MODE SWITCH\n");
	50	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
	51	SWIMS_USB_REQUEST_SetSwocMode, /* __u8 request */
	52	USB_TYPE_VENDOR \| USB_DIR_OUT, /* __u8 request type */
	53	eSWocMode, /* __u16 value */
	54	0x0000, /* __u16 index */
	55	NULL, /* void data /
	56	0, /* __u16 size */
	57	USB_CTRL_SET_TIMEOUT); /* int timeout */
	58	return result;
	59	}
	60
	61
	62	static int sierra_get_swoc_info(struct usb_device *udev,
	63	struct swoc_info *swocInfo)
	64	{
	65	int result;
	66
	67	US_DEBUGP("SWIMS: Attempting to get TRU-Install info.\n");
	68
	69	result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
	70	SWIMS_USB_REQUEST_GetSwocInfo, /* __u8 request */
71	USB_TYPE_VENDOR \| USB_DIR_IN, /* __u8 request type */
72	0, /* __u16 value */
73	0, /* __u16 index */
74	(void ) swocInfo, / void data /
75	sizeof(struct swoc_info), /* __u16 size */
76	USB_CTRL_SET_TIMEOUT); /* int timeout */
77
78	swocInfo->LinuxSKU = le16_to_cpu(swocInfo->LinuxSKU);
79	swocInfo->LinuxVer = le16_to_cpu(swocInfo->LinuxVer);
80	return result;
81	}
82
83	static void debug_swoc(struct swoc_info *swocInfo)
84	{
85	US_DEBUGP("SWIMS: SWoC Rev: %02d \n", swocInfo->rev);
86	US_DEBUGP("SWIMS: Linux SKU: %04X \n", swocInfo->LinuxSKU);
87	US_DEBUGP("SWIMS: Linux Version: %04X \n", swocInfo->LinuxVer);
88	}
89
90
91	static ssize_t show_truinst(struct device dev, struct device_attribute attr,
92	char *buf)
93	{
94	struct swoc_info *swocInfo;
95	struct usb_interface *intf = to_usb_interface(dev);
96	struct usb_device *udev = interface_to_usbdev(intf);
97	int result;
98	if (swi_tru_install == TRU_FORCE_MS) {
99	result = snprintf(buf, PAGE_SIZE, "Forced Mass Storage\n");
100	} else {
101	swocInfo = kmalloc(sizeof(struct swoc_info), GFP_KERNEL);
102	if (!swocInfo) {
103	US_DEBUGP("SWIMS: Allocation failure\n");
104	snprintf(buf, PAGE_SIZE, "Error\n");
105	return -ENOMEM;
106	}
107	result = sierra_get_swoc_info(udev, swocInfo);
108	if (result < 0) {
109	US_DEBUGP("SWIMS: failed SWoC query\n");
110	kfree(swocInfo);
111	snprintf(buf, PAGE_SIZE, "Error\n");
112	return -EIO;
113	}
114	debug_swoc(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_IWUGO \| S_IRUGO, show_truinst, NULL);
125
126	int sierra_ms_init(struct us_data *us)
127	{
128	int result, retries;
129	signed long delay_t;
130	struct swoc_info *swocInfo;
131	struct usb_device *udev;
132	struct Scsi_Host *sh;
133	struct scsi_device *sd;
134
135	delay_t = 2;
136	retries = 3;
137	result = 0;
138	udev = us->pusb_dev;
139
140	sh = us_to_host(us);
141	sd = scsi_get_host_dev(sh);
142
143	US_DEBUGP("SWIMS: sierra_ms_init called\n");
144
145	/* Force Modem mode */
146	if (swi_tru_install == TRU_FORCE_MODEM) {
147	US_DEBUGP("SWIMS: %s", "Forcing Modem Mode\n");
148	result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
149	if (result < 0)
150	US_DEBUGP("SWIMS: Failed to switch to modem mode.\n");
151	return -EIO;
152	}
153	/* Force Mass Storage mode (keep CD-Rom) */
154	else if (swi_tru_install == TRU_FORCE_MS) {
155	US_DEBUGP("SWIMS: %s", "Forcing Mass Storage Mode\n");
156	goto complete;
157	}
158	/* Normal TRU-Install Logic */
159	else {
160	US_DEBUGP("SWIMS: %s", "Normal SWoC Logic\n");
161
162	swocInfo = kmalloc(sizeof(struct swoc_info),
163	GFP_KERNEL);
164	if (!swocInfo) {
165	US_DEBUGP("SWIMS: %s", "Allocation failure\n");
166	return -ENOMEM;
167	}
168
169	retries = 3;
170	do {
171	retries--;
172	result = sierra_get_swoc_info(udev, swocInfo);
173	if (result < 0) {
174	US_DEBUGP("SWIMS: %s", "Failed SWoC query\n");
175	schedule_timeout_uninterruptible(2*HZ);
176	}
177	} while (retries && result < 0);
178
179	if (result < 0) {
180	US_DEBUGP("SWIMS: %s",
181	"Completely failed SWoC query\n");
182	kfree(swocInfo);
183	return -EIO;
184	}
185
186	debug_swoc(swocInfo);
187
188	/* If there is not Linux software on the TRU-Install device
189	* then switch to modem mode
190	*/
191	if (!containsFullLinuxPackage(swocInfo)) {
192	US_DEBUGP("SWIMS: %s",
193	"Switching to Modem Mode\n");
194	result = sierra_set_ms_mode(udev,
195	SWIMS_SET_MODE_Modem);
196	if (result < 0)
197	US_DEBUGP("SWIMS: Failed to switch modem\n");
198	kfree(swocInfo);
199	return -EIO;
200	}
201	kfree(swocInfo);
202	}
203	complete:
204	result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
205
be475d90	206	return 0;
32fe5e39 KL	207	}
32fe5e39 KL	208