EXPORT_SYMBOL(mmc_detect_change);
+void mmc_init_erase(struct mmc_card *card)
+{
+ unsigned int sz;
+
+ if (is_power_of_2(card->erase_size))
+ card->erase_shift = ffs(card->erase_size) - 1;
+ else
+ card->erase_shift = 0;
+
+ /*
+ * It is possible to erase an arbitrarily large area of an SD or MMC
+ * card. That is not desirable because it can take a long time
+ * (minutes) potentially delaying more important I/O, and also the
+ * timeout calculations become increasingly hugely over-estimated.
+ * Consequently, 'pref_erase' is defined as a guide to limit erases
+ * to that size and alignment.
+ *
+ * For SD cards that define Allocation Unit size, limit erases to one
+ * Allocation Unit at a time. For MMC cards that define High Capacity
+ * Erase Size, whether it is switched on or not, limit to that size.
+ * Otherwise just have a stab at a good value. For modern cards it
+ * will end up being 4MiB. Note that if the value is too small, it
+ * can end up taking longer to erase.
+ */
+ if (mmc_card_sd(card) && card->ssr.au) {
+ card->pref_erase = card->ssr.au;
+ card->erase_shift = ffs(card->ssr.au) - 1;
+ } else if (card->ext_csd.hc_erase_size) {
+ card->pref_erase = card->ext_csd.hc_erase_size;
+ } else {
+ sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11;
+ if (sz < 128)
+ card->pref_erase = 512 * 1024 / 512;
+ else if (sz < 512)
+ card->pref_erase = 1024 * 1024 / 512;
+ else if (sz < 1024)
+ card->pref_erase = 2 * 1024 * 1024 / 512;
+ else
+ card->pref_erase = 4 * 1024 * 1024 / 512;
+ if (card->pref_erase < card->erase_size)
+ card->pref_erase = card->erase_size;
+ else {
+ sz = card->pref_erase % card->erase_size;
+ if (sz)
+ card->pref_erase += card->erase_size - sz;
+ }
+ }
+}
+
+static void mmc_set_mmc_erase_timeout(struct mmc_card *card,
+ struct mmc_command *cmd,
+ unsigned int arg, unsigned int qty)
+{
+ unsigned int erase_timeout;
+
+ if (card->ext_csd.erase_group_def & 1) {
+ /* High Capacity Erase Group Size uses HC timeouts */
+ if (arg == MMC_TRIM_ARG)
+ erase_timeout = card->ext_csd.trim_timeout;
+ else
+ erase_timeout = card->ext_csd.hc_erase_timeout;
+ } else {
+ /* CSD Erase Group Size uses write timeout */
+ unsigned int mult = (10 << card->csd.r2w_factor);
+ unsigned int timeout_clks = card->csd.tacc_clks * mult;
+ unsigned int timeout_us;
+
+ /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */
+ if (card->csd.tacc_ns < 1000000)
+ timeout_us = (card->csd.tacc_ns * mult) / 1000;
+ else
+ timeout_us = (card->csd.tacc_ns / 1000) * mult;
+
+ /*
+ * ios.clock is only a target. The real clock rate might be
+ * less but not that much less, so fudge it by multiplying by 2.
+ */
+ timeout_clks <<= 1;
+ timeout_us += (timeout_clks * 1000) /
+ (card->host->ios.clock / 1000);
+
+ erase_timeout = timeout_us / 1000;
+
+ /*
+ * Theoretically, the calculation could underflow so round up
+ * to 1ms in that case.
+ */
+ if (!erase_timeout)
+ erase_timeout = 1;
+ }
+
+ /* Multiplier for secure operations */
+ if (arg & MMC_SECURE_ARGS) {
+ if (arg == MMC_SECURE_ERASE_ARG)
+ erase_timeout *= card->ext_csd.sec_erase_mult;
+ else
+ erase_timeout *= card->ext_csd.sec_trim_mult;
+ }
+
+ erase_timeout *= qty;
+
+ /*
+ * Ensure at least a 1 second timeout for SPI as per
+ * 'mmc_set_data_timeout()'
+ */
+ if (mmc_host_is_spi(card->host) && erase_timeout < 1000)
+ erase_timeout = 1000;
+
+ cmd->erase_timeout = erase_timeout;
+}
+
+static void mmc_set_sd_erase_timeout(struct mmc_card *card,
+ struct mmc_command *cmd, unsigned int arg,
+ unsigned int qty)
+{
+ if (card->ssr.erase_timeout) {
+ /* Erase timeout specified in SD Status Register (SSR) */
+ cmd->erase_timeout = card->ssr.erase_timeout * qty +
+ card->ssr.erase_offset;
+ } else {
+ /*
+ * Erase timeout not specified in SD Status Register (SSR) so
+ * use 250ms per write block.
+ */
+ cmd->erase_timeout = 250 * qty;
+ }
+
+ /* Must not be less than 1 second */
+ if (cmd->erase_timeout < 1000)
+ cmd->erase_timeout = 1000;
+}
+
+static void mmc_set_erase_timeout(struct mmc_card *card,
+ struct mmc_command *cmd, unsigned int arg,
+ unsigned int qty)
+{
+ if (mmc_card_sd(card))
+ mmc_set_sd_erase_timeout(card, cmd, arg, qty);
+ else
+ mmc_set_mmc_erase_timeout(card, cmd, arg, qty);
+}
+
+static int mmc_do_erase(struct mmc_card *card, unsigned int from,
+ unsigned int to, unsigned int arg)
+{
+ struct mmc_command cmd;
+ unsigned int qty = 0;
+ int err;
+
+ /*
+ * qty is used to calculate the erase timeout which depends on how many
+ * erase groups (or allocation units in SD terminology) are affected.
+ * We count erasing part of an erase group as one erase group.
+ * For SD, the allocation units are always a power of 2. For MMC, the
+ * erase group size is almost certainly also power of 2, but it does not
+ * seem to insist on that in the JEDEC standard, so we fall back to
+ * division in that case. SD may not specify an allocation unit size,
+ * in which case the timeout is based on the number of write blocks.
+ *
+ * Note that the timeout for secure trim 2 will only be correct if the
+ * number of erase groups specified is the same as the total of all
+ * preceding secure trim 1 commands. Since the power may have been
+ * lost since the secure trim 1 commands occurred, it is generally
+ * impossible to calculate the secure trim 2 timeout correctly.
+ */
+ if (card->erase_shift)
+ qty += ((to >> card->erase_shift) -
+ (from >> card->erase_shift)) + 1;
+ else if (mmc_card_sd(card))
+ qty += to - from + 1;
+ else
+ qty += ((to / card->erase_size) -
+ (from / card->erase_size)) + 1;
+
+ if (!mmc_card_blockaddr(card)) {
+ from <<= 9;
+ to <<= 9;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ if (mmc_card_sd(card))
+ cmd.opcode = SD_ERASE_WR_BLK_START;
+ else
+ cmd.opcode = MMC_ERASE_GROUP_START;
+ cmd.arg = from;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ printk(KERN_ERR "mmc_erase: group start error %d, "
+ "status %#x\n", err, cmd.resp[0]);
+ err = -EINVAL;
+ goto out;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ if (mmc_card_sd(card))
+ cmd.opcode = SD_ERASE_WR_BLK_END;
+ else
+ cmd.opcode = MMC_ERASE_GROUP_END;
+ cmd.arg = to;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ printk(KERN_ERR "mmc_erase: group end error %d, status %#x\n",
+ err, cmd.resp[0]);
+ err = -EINVAL;
+ goto out;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ cmd.opcode = MMC_ERASE;
+ cmd.arg = arg;
+ cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+ mmc_set_erase_timeout(card, &cmd, arg, qty);
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n",
+ err, cmd.resp[0]);
+ err = -EIO;
+ goto out;
+ }
+
+ if (mmc_host_is_spi(card->host))
+ goto out;
+
+ do {
+ memset(&cmd, 0, sizeof(struct mmc_command));
+ cmd.opcode = MMC_SEND_STATUS;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ /* Do not retry else we can't see errors */
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err || (cmd.resp[0] & 0xFDF92000)) {
+ printk(KERN_ERR "error %d requesting status %#x\n",
+ err, cmd.resp[0]);
+ err = -EIO;
+ goto out;
+ }
+ } while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
+ R1_CURRENT_STATE(cmd.resp[0]) == 7);
+out:
+ return err;
+}
+
+/**
+ * mmc_erase - erase sectors.
+ * @card: card to erase
+ * @from: first sector to erase
+ * @nr: number of sectors to erase
+ * @arg: erase command argument (SD supports only %MMC_ERASE_ARG)
+ *
+ * Caller must claim host before calling this function.
+ */
+int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
+ unsigned int arg)
+{
+ unsigned int rem, to = from + nr;
+
+ if (!(card->host->caps & MMC_CAP_ERASE) ||
+ !(card->csd.cmdclass & CCC_ERASE))
+ return -EOPNOTSUPP;
+
+ if (!card->erase_size)
+ return -EOPNOTSUPP;
+
+ if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
+ return -EOPNOTSUPP;
+
+ if ((arg & MMC_SECURE_ARGS) &&
+ !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
+ return -EOPNOTSUPP;
+
+ if ((arg & MMC_TRIM_ARGS) &&
+ !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
+ return -EOPNOTSUPP;
+
+ if (arg == MMC_SECURE_ERASE_ARG) {
+ if (from % card->erase_size || nr % card->erase_size)
+ return -EINVAL;
+ }
+
+ if (arg == MMC_ERASE_ARG) {
+ rem = from % card->erase_size;
+ if (rem) {
+ rem = card->erase_size - rem;
+ from += rem;
+ if (nr > rem)
+ nr -= rem;
+ else
+ return 0;
+ }
+ rem = nr % card->erase_size;
+ if (rem)
+ nr -= rem;
+ }
+
+ if (nr == 0)
+ return 0;
+
+ to = from + nr;
+
+ if (to <= from)
+ return -EINVAL;
+
+ /* 'from' and 'to' are inclusive */
+ to -= 1;
+
+ return mmc_do_erase(card, from, to, arg);
+}
+EXPORT_SYMBOL(mmc_erase);
+
+int mmc_can_erase(struct mmc_card *card)
+{
+ if ((card->host->caps & MMC_CAP_ERASE) &&
+ (card->csd.cmdclass & CCC_ERASE) && card->erase_size)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_erase);
+
+int mmc_can_trim(struct mmc_card *card)
+{
+ if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_trim);
+
+int mmc_can_secure_erase_trim(struct mmc_card *card)
+{
+ if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_secure_erase_trim);
+
+int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
+ unsigned int nr)
+{
+ if (!card->erase_size)
+ return 0;
+ if (from % card->erase_size || nr % card->erase_size)
+ return 0;
+ return 1;
+}
+EXPORT_SYMBOL(mmc_erase_group_aligned);
+
+ #if defined(CONFIG_SDMMC_RK29) && !defined(CONFIG_SDMMC_RK29_OLD)
void mmc_rescan(struct work_struct *work)
{
struct mmc_host *host =
extend_wakelock = 1;
goto out;
}
+ #if !defined(CONFIG_USE_SDMMC0_FOR_WIFI_DEVELOP_BOARD)
}
-
+ #endif
+
+ /*
+ * ...then normal SD...
+ */
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+ if (!err) {
+ printk("\n%s..%d.. ===== Begin to identify card as SD-card ===xbw[%s]===\n",__FUNCTION__, __LINE__, mmc_hostname(host));
+
+ if (mmc_attach_sd(host, ocr))
+ {
+ printk("\n=====\n%s..%d.. ===== Initialize SD-card unsuccessfully!!! ===xbw[%s]===\n====\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ mmc_power_off(host);
+ }
+ else
+ {
+ printk("%s..%d.. ===== Initialize SD-card successfully. ===xbw[%s]===\n",__FUNCTION__, __LINE__, mmc_hostname(host));
+ }
+ extend_wakelock = 1;
+ goto out;
+ }
+
+ /*
+ * ...and finally MMC.
+ */
+ err = mmc_send_op_cond(host, 0, &ocr);
+ if (!err) {
+ printk("\n%s..%d.. ===== Begin to identify card as MMC-card ===xbw[%s]===\n", __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ if (mmc_attach_mmc(host, ocr))
+ {
+ printk("\n =====\n%s..%d.. ===== Initialize MMC-card unsuccessfully!!! ===xbw[%s]===\n======\n",\
+ __FUNCTION__, __LINE__, mmc_hostname(host));
+
+ mmc_power_off(host);
+ }
+ else
+ {
+ printk("%s...%d.. ===== Initialize MMC-card successfully. ===xbw[%s]===\n",__FUNCTION__, __LINE__, mmc_hostname(host));
+ }
+ extend_wakelock = 1;
+ goto out;
+ }
+
+ mmc_release_host(host);
+ mmc_power_off(host);
+
+ out:
+
+ if (extend_wakelock)
+ wake_lock_timeout(&mmc_delayed_work_wake_lock, HZ / 2);
+ else
+ wake_unlock(&mmc_delayed_work_wake_lock);
+
+ if (host->caps & MMC_CAP_NEEDS_POLL)
+ mmc_schedule_delayed_work(&host->detect, HZ);
+ }
+
#else
- int extend_wakelock = 0;
-
-#if defined(CONFIG_SDMMC_RK29) && defined(CONFIG_SDMMC_RK29_OLD)
+ void mmc_rescan(struct work_struct *work)
+ {
+ struct mmc_host *host =
+ container_of(work, struct mmc_host, detect.work);
+ u32 ocr;
+ int err;
-#endif
+ unsigned long flags;
++ int extend_wakelock = 0;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ if (host->rescan_disable) {
+ spin_unlock_irqrestore(&host->lock, flags);
+ return;
+ }
+
+ spin_unlock_irqrestore(&host->lock, flags);
-
+
+
+ mmc_bus_get(host);
+
+ /* if there is a card registered, check whether it is still present */
+ if ((host->bus_ops != NULL) && host->bus_ops->detect && !host->bus_dead)
+ host->bus_ops->detect(host);
+
+ /* If the card was removed the bus will be marked
+ * as dead - extend the wakelock so userspace
+ * can respond */
+ if (host->bus_dead)
+ extend_wakelock = 1;
+
+ mmc_bus_put(host);
+
+
+ mmc_bus_get(host);
+
+ /* if there still is a card present, stop here */
+ if (host->bus_ops != NULL) {
+ mmc_bus_put(host);
+ goto out;
+ }
+
+ /* detect a newly inserted card */
+
+ /*
+ * Only we can add a new handler, so it's safe to
+ * release the lock here.
+ */
+ mmc_bus_put(host);
-
++
+ if (host->ops->get_cd && host->ops->get_cd(host) == 0)
+ goto out;
+
+ mmc_claim_host(host);
+
+ mmc_power_up(host);
++ sdio_reset(host);
+ mmc_go_idle(host);
++
mmc_send_if_cond(host, host->ocr_avail);
/*
*/
err = mmc_send_io_op_cond(host, 0, &ocr);
if (!err) {
- if (mmc_attach_sdio(host, ocr))
- mmc_power_off(host);
- extend_wakelock = 1;
+ if (mmc_attach_sdio(host, ocr)) {
+ mmc_claim_host(host);
+ /* try SDMEM (but not MMC) even if SDIO is broken */
+ if (mmc_send_app_op_cond(host, 0, &ocr))
+ goto out_fail;
+
+ if (mmc_attach_sd(host, ocr))
+ mmc_power_off(host);
+ extend_wakelock = 1;
+ }
goto out;
}
- #endif
/*
* ...then normal SD...
#include "gadget_chips.h"
-#define BULK_BUFFER_SIZE 16384 * 4//4096
+#ifdef CONFIG_USB_ANDROID_MASS_STORAGE
+#include <linux/usb/android_composite.h>
+#include <linux/platform_device.h>
+
+#define FUNCTION_NAME "usb_mass_storage"
+#endif
-/*-------------------------------------------------------------------------*/
-
-#define DRIVER_NAME "usb_mass_storage"
-#define MAX_LUNS 8
-
-static const char shortname[] = DRIVER_NAME;
-
-#ifdef DEBUG
-#define LDBG(lun, fmt, args...) \
- dev_dbg(&(lun)->dev , fmt , ## args)
-#define MDBG(fmt,args...) \
- printk(KERN_DEBUG DRIVER_NAME ": " fmt , ## args)
-#else
-#define LDBG(lun, fmt, args...) \
- do { } while (0)
-#define MDBG(fmt,args...) \
- do { } while (0)
-#undef VERBOSE_DEBUG
-#undef DUMP_MSGS
-#endif /* DEBUG */
-
-#ifdef VERBOSE_DEBUG
-#define VLDBG LDBG
-#else
-#define VLDBG(lun, fmt, args...) \
- do { } while (0)
-#endif /* VERBOSE_DEBUG */
-
-#define LERROR(lun, fmt, args...) \
- dev_err(&(lun)->dev , fmt , ## args)
-#define LWARN(lun, fmt, args...) \
- dev_warn(&(lun)->dev , fmt , ## args)
-#define LINFO(lun, fmt, args...) \
- dev_info(&(lun)->dev , fmt , ## args)
-
-#define MINFO(fmt,args...) \
- printk(KERN_INFO DRIVER_NAME ": " fmt , ## args)
-
-#undef DBG
-#undef VDBG
-#undef ERROR
-#undef WARNING
-#undef INFO
-#define DBG(d, fmt, args...) \
- dev_dbg(&(d)->cdev->gadget->dev , fmt , ## args)
-#define VDBG(d, fmt, args...) \
- dev_vdbg(&(d)->cdev->gadget->dev , fmt , ## args)
-#define ERROR(d, fmt, args...) \
- dev_err(&(d)->cdev->gadget->dev , fmt , ## args)
-#define WARNING(d, fmt, args...) \
- dev_warn(&(d)->cdev->gadget->dev , fmt , ## args)
-#define INFO(d, fmt, args...) \
- dev_info(&(d)->cdev->gadget->dev , fmt , ## args)
-
-
-/*-------------------------------------------------------------------------*/
-
-/* Bulk-only data structures */
-
-/* Command Block Wrapper */
-struct bulk_cb_wrap {
- __le32 Signature; /* Contains 'USBC' */
- u32 Tag; /* Unique per command id */
- __le32 DataTransferLength; /* Size of the data */
- u8 Flags; /* Direction in bit 7 */
- u8 Lun; /* LUN (normally 0) */
- u8 Length; /* Of the CDB, <= MAX_COMMAND_SIZE */
- u8 CDB[16]; /* Command Data Block */
-};
-
-#define USB_BULK_CB_WRAP_LEN 31
-#define USB_BULK_CB_SIG 0x43425355 /* Spells out USBC */
-#define USB_BULK_IN_FLAG 0x80
-
-/* Command Status Wrapper */
-struct bulk_cs_wrap {
- __le32 Signature; /* Should = 'USBS' */
- u32 Tag; /* Same as original command */
- __le32 Residue; /* Amount not transferred */
- u8 Status; /* See below */
-};
-
-#define USB_BULK_CS_WRAP_LEN 13
-#define USB_BULK_CS_SIG 0x53425355 /* Spells out 'USBS' */
-#define USB_STATUS_PASS 0
-#define USB_STATUS_FAIL 1
-#define USB_STATUS_PHASE_ERROR 2
-
-/* Bulk-only class specific requests */
-#define USB_BULK_RESET_REQUEST 0xff
-#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe
-
-/* Length of a SCSI Command Data Block */
-#define MAX_COMMAND_SIZE 16
-
-/* SCSI commands that we recognize */
-#define SC_FORMAT_UNIT 0x04
-#define SC_INQUIRY 0x12
-#define SC_MODE_SELECT_6 0x15
-#define SC_MODE_SELECT_10 0x55
-#define SC_MODE_SENSE_6 0x1a
-#define SC_MODE_SENSE_10 0x5a
-#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e
-#define SC_READ_6 0x08
-#define SC_READ_10 0x28
-#define SC_READ_12 0xa8
-#define SC_READ_CAPACITY 0x25
-#define SC_READ_FORMAT_CAPACITIES 0x23
-#define SC_RELEASE 0x17
-#define SC_REQUEST_SENSE 0x03
-#define SC_RESERVE 0x16
-#define SC_SEND_DIAGNOSTIC 0x1d
-#define SC_START_STOP_UNIT 0x1b
-#define SC_SYNCHRONIZE_CACHE 0x35
-#define SC_TEST_UNIT_READY 0x00
-#define SC_VERIFY 0x2f
-#define SC_WRITE_6 0x0a
-#define SC_WRITE_10 0x2a
-#define SC_WRITE_12 0xaa
-
-/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
-#define SS_NO_SENSE 0
-#define SS_COMMUNICATION_FAILURE 0x040800
-#define SS_INVALID_COMMAND 0x052000
-#define SS_INVALID_FIELD_IN_CDB 0x052400
-#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
-#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
-#define SS_MEDIUM_NOT_PRESENT 0x023a00
-#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
-#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
-#define SS_RESET_OCCURRED 0x062900
-#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
-#define SS_UNRECOVERED_READ_ERROR 0x031100
-#define SS_WRITE_ERROR 0x030c02
-#define SS_WRITE_PROTECTED 0x072700
-
-#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
-#define ASC(x) ((u8) ((x) >> 8))
-#define ASCQ(x) ((u8) (x))
-
-static int usb_msc_connected; /*usb charge status*/
-/*-------------------------------------------------------------------------*/
-
-struct lun {
- struct file *filp;
- loff_t file_length;
- loff_t num_sectors;
- unsigned int unflushed_packet;
- unsigned int unflushed_bytes;
-
- unsigned int ro : 1;
- unsigned int prevent_medium_removal : 1;
- unsigned int registered : 1;
- unsigned int info_valid : 1;
-
- u32 sense_data;
- u32 sense_data_info;
- u32 unit_attention_data;
-
- struct device dev;
-};
-
-#define backing_file_is_open(curlun) ((curlun)->filp != NULL)
+#ifdef CONFIG_ARCH_RK29
+ /* flush after every 4 meg of writes to avoid excessive block level caching */
+ #define MAX_UNFLUSHED_BYTES (64 * 1024)// (4 * 1024 * 1024) //original value is 4MB,Modifyed by xbw at 2011-08-18
+ #define MAX_UNFLUSHED_PACKETS 4//16
+
+#include <linux/power_supply.h>
+#include <linux/reboot.h>
+#include <linux/syscalls.h>
+static int usb_msc_connected; /*usb charge status*/
-static struct lun *dev_to_lun(struct device *dev)
+static void set_msc_connect_flag( int connected )
{
- return container_of(dev, struct lun, dev);
+ printk("%s status = %d 20101216\n" , __func__, connected);
+ if( usb_msc_connected == connected )
+ return;
+ usb_msc_connected = connected;//usb mass storage is ok
}
-/* Big enough to hold our biggest descriptor */
-#define EP0_BUFSIZE 256
+int get_msc_connect_flag( void )
+{
+ return usb_msc_connected;
+}
+EXPORT_SYMBOL(get_msc_connect_flag);
+#endif
-/* Number of buffers we will use. 2 is enough for double-buffering */
-#define NUM_BUFFERS 2
+/*------------------------------------------------------------------------*/
-enum fsg_buffer_state {
- BUF_STATE_EMPTY = 0,
- BUF_STATE_FULL,
- BUF_STATE_BUSY
-};
+#define FSG_DRIVER_DESC "Mass Storage Function"
+#define FSG_DRIVER_VERSION "2009/09/11"
-struct fsg_buffhd {
- void *buf;
- enum fsg_buffer_state state;
- struct fsg_buffhd *next;
+static const char fsg_string_interface[] = "Mass Storage";
- /* The NetChip 2280 is faster, and handles some protocol faults
- * better, if we don't submit any short bulk-out read requests.
- * So we will record the intended request length here. */
- unsigned int bulk_out_intended_length;
- struct usb_request *inreq;
- int inreq_busy;
- struct usb_request *outreq;
- int outreq_busy;
-};
+#define FSG_NO_INTR_EP 1
+#define FSG_NO_DEVICE_STRINGS 1
+#define FSG_NO_OTG 1
+#define FSG_NO_INTR_EP 1
-enum fsg_state {
- /* This one isn't used anywhere */
- FSG_STATE_COMMAND_PHASE = -10,
+#include "storage_common.c"
- FSG_STATE_DATA_PHASE,
- FSG_STATE_STATUS_PHASE,
- FSG_STATE_IDLE = 0,
- FSG_STATE_ABORT_BULK_OUT,
- FSG_STATE_RESET,
- FSG_STATE_CONFIG_CHANGE,
- FSG_STATE_EXIT,
- FSG_STATE_TERMINATED
-};
+/*-------------------------------------------------------------------------*/
-enum data_direction {
- DATA_DIR_UNKNOWN = 0,
- DATA_DIR_FROM_HOST,
- DATA_DIR_TO_HOST,
- DATA_DIR_NONE
+struct fsg_dev;
+struct fsg_common;
+
+/* FSF callback functions */
+struct fsg_operations {
+ /* Callback function to call when thread exits. If no
+ * callback is set or it returns value lower then zero MSF
+ * will force eject all LUNs it operates on (including those
+ * marked as non-removable or with prevent_medium_removal flag
+ * set). */
+ int (*thread_exits)(struct fsg_common *common);
+
+ /* Called prior to ejection. Negative return means error,
+ * zero means to continue with ejection, positive means not to
+ * eject. */
+ int (*pre_eject)(struct fsg_common *common,
+ struct fsg_lun *lun, int num);
+ /* Called after ejection. Negative return means error, zero
+ * or positive is just a success. */
+ int (*post_eject)(struct fsg_common *common,
+ struct fsg_lun *lun, int num);
};
-struct fsg_dev {
- struct usb_function function;
- struct usb_composite_dev *cdev;
-
- /* optional "usb_mass_storage" platform device */
- struct platform_device *pdev;
- /* lock protects: state and all the req_busy's */
- spinlock_t lock;
+/* Data shared by all the FSG instances. */
+struct fsg_common {
+ struct usb_gadget *gadget;
+ struct fsg_dev *fsg, *new_fsg;
+ wait_queue_head_t fsg_wait;
/* filesem protects: backing files in use */
struct rw_semaphore filesem;
}
file_offset += nwritten;
amount_left_to_write -= nwritten;
- fsg->residue -= nwritten;
+ common->residue -= nwritten;
- fsync_sub(curlun);
+ #ifdef MAX_UNFLUSHED_PACKETS
+ curlun->unflushed_packet ++;
+ curlun->unflushed_bytes += nwritten;
+ if( (curlun->unflushed_packet >= MAX_UNFLUSHED_PACKETS) || (curlun->unflushed_bytes >= MAX_UNFLUSHED_BYTES)) {
++ fsg_lun_fsync_sub(curlun);
+ curlun->unflushed_packet = 0;
+ curlun->unflushed_bytes = 0;
+ }
+ #endif
/* If an error occurred, report it and its position */
if (nwritten < amount) {
curlun->sense_data = SS_WRITE_ERROR;
--- /dev/null
+/*
+ * storage_common.c -- Common definitions for mass storage functionality
+ *
+ * Copyright (C) 2003-2008 Alan Stern
+ * Copyeight (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz (m.nazarewicz@samsung.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+/*
+ * This file requires the following identifiers used in USB strings to
+ * be defined (each of type pointer to char):
+ * - fsg_string_manufacturer -- name of the manufacturer
+ * - fsg_string_product -- name of the product
+ * - fsg_string_serial -- product's serial
+ * - fsg_string_config -- name of the configuration
+ * - fsg_string_interface -- name of the interface
+ * The first four are only needed when FSG_DESCRIPTORS_DEVICE_STRINGS
+ * macro is defined prior to including this file.
+ */
+
+/*
+ * When FSG_NO_INTR_EP is defined fsg_fs_intr_in_desc and
+ * fsg_hs_intr_in_desc objects as well as
+ * FSG_FS_FUNCTION_PRE_EP_ENTRIES and FSG_HS_FUNCTION_PRE_EP_ENTRIES
+ * macros are not defined.
+ *
+ * When FSG_NO_DEVICE_STRINGS is defined FSG_STRING_MANUFACTURER,
+ * FSG_STRING_PRODUCT, FSG_STRING_SERIAL and FSG_STRING_CONFIG are not
+ * defined (as well as corresponding entries in string tables are
+ * missing) and FSG_STRING_INTERFACE has value of zero.
+ *
+ * When FSG_NO_OTG is defined fsg_otg_desc won't be defined.
+ */
+
+/*
+ * When FSG_BUFFHD_STATIC_BUFFER is defined when this file is included
+ * the fsg_buffhd structure's buf field will be an array of FSG_BUFLEN
+ * characters rather then a pointer to void.
+ */
+
+
+#include <asm/unaligned.h>
+
+
+/*
+ * Thanks to NetChip Technologies for donating this product ID.
+ *
+ * DO NOT REUSE THESE IDs with any other driver!! Ever!!
+ * Instead: allocate your own, using normal USB-IF procedures.
+ */
+#define FSG_VENDOR_ID 0x0525 /* NetChip */
+#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
+
+
+/*-------------------------------------------------------------------------*/
+
+
+#ifndef DEBUG
+#undef VERBOSE_DEBUG
+#undef DUMP_MSGS
+#endif /* !DEBUG */
+
+#ifdef VERBOSE_DEBUG
+#define VLDBG LDBG
+#else
+#define VLDBG(lun, fmt, args...) do { } while (0)
+#endif /* VERBOSE_DEBUG */
+
+#define LDBG(lun, fmt, args...) dev_dbg (&(lun)->dev, fmt, ## args)
+#define LERROR(lun, fmt, args...) dev_err (&(lun)->dev, fmt, ## args)
+#define LWARN(lun, fmt, args...) dev_warn(&(lun)->dev, fmt, ## args)
+#define LINFO(lun, fmt, args...) dev_info(&(lun)->dev, fmt, ## args)
+
+/*
+ * Keep those macros in sync with those in
+ * include/linux/usb/composite.h or else GCC will complain. If they
+ * are identical (the same names of arguments, white spaces in the
+ * same places) GCC will allow redefinition otherwise (even if some
+ * white space is removed or added) warning will be issued.
+ *
+ * Those macros are needed here because File Storage Gadget does not
+ * include the composite.h header. For composite gadgets those macros
+ * are redundant since composite.h is included any way.
+ *
+ * One could check whether those macros are already defined (which
+ * would indicate composite.h had been included) or not (which would
+ * indicate we were in FSG) but this is not done because a warning is
+ * desired if definitions here differ from the ones in composite.h.
+ *
+ * We want the definitions to match and be the same in File Storage
+ * Gadget as well as Mass Storage Function (and so composite gadgets
+ * using MSF). If someone changes them in composite.h it will produce
+ * a warning in this file when building MSF.
+ */
+#define DBG(d, fmt, args...) dev_dbg(&(d)->gadget->dev , fmt , ## args)
+#define VDBG(d, fmt, args...) dev_vdbg(&(d)->gadget->dev , fmt , ## args)
+#define ERROR(d, fmt, args...) dev_err(&(d)->gadget->dev , fmt , ## args)
+#define WARNING(d, fmt, args...) dev_warn(&(d)->gadget->dev , fmt , ## args)
+#define INFO(d, fmt, args...) dev_info(&(d)->gadget->dev , fmt , ## args)
+
+
+
+#ifdef DUMP_MSGS
+
+# define dump_msg(fsg, /* const char * */ label, \
+ /* const u8 * */ buf, /* unsigned */ length) do { \
+ if (length < 512) { \
+ DBG(fsg, "%s, length %u:\n", label, length); \
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
+ 16, 1, buf, length, 0); \
+ } \
+} while (0)
+
+# define dump_cdb(fsg) do { } while (0)
+
+#else
+
+# define dump_msg(fsg, /* const char * */ label, \
+ /* const u8 * */ buf, /* unsigned */ length) do { } while (0)
+
+# ifdef VERBOSE_DEBUG
+
+# define dump_cdb(fsg) \
+ print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
+ 16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
+
+# else
+
+# define dump_cdb(fsg) do { } while (0)
+
+# endif /* VERBOSE_DEBUG */
+
+#endif /* DUMP_MSGS */
+
+
+
+
+
+/*-------------------------------------------------------------------------*/
+
+/* SCSI device types */
+#define TYPE_DISK 0x00
+#define TYPE_CDROM 0x05
+
+/* USB protocol value = the transport method */
+#define USB_PR_CBI 0x00 /* Control/Bulk/Interrupt */
+#define USB_PR_CB 0x01 /* Control/Bulk w/o interrupt */
+#define USB_PR_BULK 0x50 /* Bulk-only */
+
+/* USB subclass value = the protocol encapsulation */
+#define USB_SC_RBC 0x01 /* Reduced Block Commands (flash) */
+#define USB_SC_8020 0x02 /* SFF-8020i, MMC-2, ATAPI (CD-ROM) */
+#define USB_SC_QIC 0x03 /* QIC-157 (tape) */
+#define USB_SC_UFI 0x04 /* UFI (floppy) */
+#define USB_SC_8070 0x05 /* SFF-8070i (removable) */
+#define USB_SC_SCSI 0x06 /* Transparent SCSI */
+
+/* Bulk-only data structures */
+
+/* Command Block Wrapper */
+struct fsg_bulk_cb_wrap {
+ __le32 Signature; /* Contains 'USBC' */
+ u32 Tag; /* Unique per command id */
+ __le32 DataTransferLength; /* Size of the data */
+ u8 Flags; /* Direction in bit 7 */
+ u8 Lun; /* LUN (normally 0) */
+ u8 Length; /* Of the CDB, <= MAX_COMMAND_SIZE */
+ u8 CDB[16]; /* Command Data Block */
+};
+
+#define USB_BULK_CB_WRAP_LEN 31
+#define USB_BULK_CB_SIG 0x43425355 /* Spells out USBC */
+#define USB_BULK_IN_FLAG 0x80
+
+/* Command Status Wrapper */
+struct bulk_cs_wrap {
+ __le32 Signature; /* Should = 'USBS' */
+ u32 Tag; /* Same as original command */
+ __le32 Residue; /* Amount not transferred */
+ u8 Status; /* See below */
+};
+
+#define USB_BULK_CS_WRAP_LEN 13
+#define USB_BULK_CS_SIG 0x53425355 /* Spells out 'USBS' */
+#define USB_STATUS_PASS 0
+#define USB_STATUS_FAIL 1
+#define USB_STATUS_PHASE_ERROR 2
+
+/* Bulk-only class specific requests */
+#define USB_BULK_RESET_REQUEST 0xff
+#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe
+
+
+/* CBI Interrupt data structure */
+struct interrupt_data {
+ u8 bType;
+ u8 bValue;
+};
+
+#define CBI_INTERRUPT_DATA_LEN 2
+
+/* CBI Accept Device-Specific Command request */
+#define USB_CBI_ADSC_REQUEST 0x00
+
+
+/* Length of a SCSI Command Data Block */
+#define MAX_COMMAND_SIZE 16
+
+/* SCSI commands that we recognize */
+#define SC_FORMAT_UNIT 0x04
+#define SC_INQUIRY 0x12
+#define SC_MODE_SELECT_6 0x15
+#define SC_MODE_SELECT_10 0x55
+#define SC_MODE_SENSE_6 0x1a
+#define SC_MODE_SENSE_10 0x5a
+#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e
+#define SC_READ_6 0x08
+#define SC_READ_10 0x28
+#define SC_READ_12 0xa8
+#define SC_READ_CAPACITY 0x25
+#define SC_READ_FORMAT_CAPACITIES 0x23
+#define SC_READ_HEADER 0x44
+#define SC_READ_TOC 0x43
+#define SC_RELEASE 0x17
+#define SC_REQUEST_SENSE 0x03
+#define SC_RESERVE 0x16
+#define SC_SEND_DIAGNOSTIC 0x1d
+#define SC_START_STOP_UNIT 0x1b
+#define SC_SYNCHRONIZE_CACHE 0x35
+#define SC_TEST_UNIT_READY 0x00
+#define SC_VERIFY 0x2f
+#define SC_WRITE_6 0x0a
+#define SC_WRITE_10 0x2a
+#define SC_WRITE_12 0xaa
+
+/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
+#define SS_NO_SENSE 0
+#define SS_COMMUNICATION_FAILURE 0x040800
+#define SS_INVALID_COMMAND 0x052000
+#define SS_INVALID_FIELD_IN_CDB 0x052400
+#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
+#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
+#define SS_MEDIUM_NOT_PRESENT 0x023a00
+#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
+#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
+#define SS_RESET_OCCURRED 0x062900
+#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
+#define SS_UNRECOVERED_READ_ERROR 0x031100
+#define SS_WRITE_ERROR 0x030c02
+#define SS_WRITE_PROTECTED 0x072700
+
+#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
+#define ASC(x) ((u8) ((x) >> 8))
+#define ASCQ(x) ((u8) (x))
+
+
+/*-------------------------------------------------------------------------*/
+
+
+struct fsg_lun {
+ struct file *filp;
+ loff_t file_length;
+ loff_t num_sectors;
++#ifdef MAX_UNFLUSHED_PACKETS
++ unsigned int unflushed_packet;
++ unsigned int unflushed_bytes;
++#endif
+
+ unsigned int initially_ro:1;
+ unsigned int ro:1;
+ unsigned int removable:1;
+ unsigned int cdrom:1;
+ unsigned int prevent_medium_removal:1;
+ unsigned int registered:1;
+ unsigned int info_valid:1;
+ unsigned int nofua:1;
+
+ u32 sense_data;
+ u32 sense_data_info;
+ u32 unit_attention_data;
+
+ struct device dev;
+};
+
+#define fsg_lun_is_open(curlun) ((curlun)->filp != NULL)
+
+static struct fsg_lun *fsg_lun_from_dev(struct device *dev)
+{
+ return container_of(dev, struct fsg_lun, dev);
+}
+
+
+/* Big enough to hold our biggest descriptor */
+#define EP0_BUFSIZE 256
+#define DELAYED_STATUS (EP0_BUFSIZE + 999) /* An impossibly large value */
+
+/* Number of buffers we will use. 2 is enough for double-buffering */
+#define FSG_NUM_BUFFERS 2
+
+/* Default size of buffer length. */
+#define FSG_BUFLEN ((u32)16384)
+
+/* Maximal number of LUNs supported in mass storage function */
+#define FSG_MAX_LUNS 8
+
+enum fsg_buffer_state {
+ BUF_STATE_EMPTY = 0,
+ BUF_STATE_FULL,
+ BUF_STATE_BUSY
+};
+
+struct fsg_buffhd {
+#ifdef FSG_BUFFHD_STATIC_BUFFER
+ char buf[FSG_BUFLEN];
+#else
+ void *buf;
+#endif
+ enum fsg_buffer_state state;
+ struct fsg_buffhd *next;
+
+ /*
+ * The NetChip 2280 is faster, and handles some protocol faults
+ * better, if we don't submit any short bulk-out read requests.
+ * So we will record the intended request length here.
+ */
+ unsigned int bulk_out_intended_length;
+
+ struct usb_request *inreq;
+ int inreq_busy;
+ struct usb_request *outreq;
+ int outreq_busy;
+};
+
+enum fsg_state {
+ /* This one isn't used anywhere */
+ FSG_STATE_COMMAND_PHASE = -10,
+ FSG_STATE_DATA_PHASE,
+ FSG_STATE_STATUS_PHASE,
+
+ FSG_STATE_IDLE = 0,
+ FSG_STATE_ABORT_BULK_OUT,
+ FSG_STATE_RESET,
+ FSG_STATE_INTERFACE_CHANGE,
+ FSG_STATE_CONFIG_CHANGE,
+ FSG_STATE_DISCONNECT,
+ FSG_STATE_EXIT,
+ FSG_STATE_TERMINATED
+};
+
+enum data_direction {
+ DATA_DIR_UNKNOWN = 0,
+ DATA_DIR_FROM_HOST,
+ DATA_DIR_TO_HOST,
+ DATA_DIR_NONE
+};
+
+
+/*-------------------------------------------------------------------------*/
+
+
+static inline u32 get_unaligned_be24(u8 *buf)
+{
+ return 0xffffff & (u32) get_unaligned_be32(buf - 1);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+
+enum {
+#ifndef FSG_NO_DEVICE_STRINGS
+ FSG_STRING_MANUFACTURER = 1,
+ FSG_STRING_PRODUCT,
+ FSG_STRING_SERIAL,
+ FSG_STRING_CONFIG,
+#endif
+ FSG_STRING_INTERFACE
+};
+
+
+#ifndef FSG_NO_OTG
+static struct usb_otg_descriptor
+fsg_otg_desc = {
+ .bLength = sizeof fsg_otg_desc,
+ .bDescriptorType = USB_DT_OTG,
+
+ .bmAttributes = USB_OTG_SRP,
+};
+#endif
+
+/* There is only one interface. */
+
+static struct usb_interface_descriptor
+fsg_intf_desc = {
+ .bLength = sizeof fsg_intf_desc,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bNumEndpoints = 2, /* Adjusted during fsg_bind() */
+ .bInterfaceClass = USB_CLASS_MASS_STORAGE,
+ .bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
+ .bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
+ .iInterface = FSG_STRING_INTERFACE,
+};
+
+/*
+ * Three full-speed endpoint descriptors: bulk-in, bulk-out, and
+ * interrupt-in.
+ */
+
+static struct usb_endpoint_descriptor
+fsg_fs_bulk_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ /* wMaxPacketSize set by autoconfiguration */
+};
+
+static struct usb_endpoint_descriptor
+fsg_fs_bulk_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ /* wMaxPacketSize set by autoconfiguration */
+};
+
+#ifndef FSG_NO_INTR_EP
+
+static struct usb_endpoint_descriptor
+fsg_fs_intr_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(2),
+ .bInterval = 32, /* frames -> 32 ms */
+};
+
+#ifndef FSG_NO_OTG
+# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 2
+#else
+# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 1
+#endif
+
+#endif
+
+static struct usb_descriptor_header *fsg_fs_function[] = {
+#ifndef FSG_NO_OTG
+ (struct usb_descriptor_header *) &fsg_otg_desc,
+#endif
+ (struct usb_descriptor_header *) &fsg_intf_desc,
+ (struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
+ (struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
+#ifndef FSG_NO_INTR_EP
+ (struct usb_descriptor_header *) &fsg_fs_intr_in_desc,
+#endif
+ NULL,
+};
+
+
+/*
+ * USB 2.0 devices need to expose both high speed and full speed
+ * descriptors, unless they only run at full speed.
+ *
+ * That means alternate endpoint descriptors (bigger packets)
+ * and a "device qualifier" ... plus more construction options
+ * for the configuration descriptor.
+ */
+static struct usb_endpoint_descriptor
+fsg_hs_bulk_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor
+fsg_hs_bulk_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+ .bInterval = 1, /* NAK every 1 uframe */
+};
+
+#ifndef FSG_NO_INTR_EP
+
+static struct usb_endpoint_descriptor
+fsg_hs_intr_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ /* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(2),
+ .bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
+};
+
+#ifndef FSG_NO_OTG
+# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 2
+#else
+# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 1
+#endif
+
+#endif
+
+static struct usb_descriptor_header *fsg_hs_function[] = {
+#ifndef FSG_NO_OTG
+ (struct usb_descriptor_header *) &fsg_otg_desc,
+#endif
+ (struct usb_descriptor_header *) &fsg_intf_desc,
+ (struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
+ (struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
+#ifndef FSG_NO_INTR_EP
+ (struct usb_descriptor_header *) &fsg_hs_intr_in_desc,
+#endif
+ NULL,
+};
+
+/* Maxpacket and other transfer characteristics vary by speed. */
+static struct usb_endpoint_descriptor *
+fsg_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
+ struct usb_endpoint_descriptor *hs)
+{
+ if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+ return hs;
+ return fs;
+}
+
+
+/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
+static struct usb_string fsg_strings[] = {
+#ifndef FSG_NO_DEVICE_STRINGS
+ {FSG_STRING_MANUFACTURER, fsg_string_manufacturer},
+ {FSG_STRING_PRODUCT, fsg_string_product},
+ {FSG_STRING_SERIAL, fsg_string_serial},
+ {FSG_STRING_CONFIG, fsg_string_config},
+#endif
+ {FSG_STRING_INTERFACE, fsg_string_interface},
+ {}
+};
+
+static struct usb_gadget_strings fsg_stringtab = {
+ .language = 0x0409, /* en-us */
+ .strings = fsg_strings,
+};
+
+
+ /*-------------------------------------------------------------------------*/
+
+/*
+ * If the next two routines are called while the gadget is registered,
+ * the caller must own fsg->filesem for writing.
+ */
+
+static int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
+{
+ int ro;
+ struct file *filp = NULL;
+ int rc = -EINVAL;
+ struct inode *inode = NULL;
+ loff_t size;
+ loff_t num_sectors;
+ loff_t min_sectors;
+
+ /* R/W if we can, R/O if we must */
+ ro = curlun->initially_ro;
+ if (!ro) {
+ filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
+ if (-EROFS == PTR_ERR(filp))
+ ro = 1;
+ }
+ if (ro)
+ filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
+ if (IS_ERR(filp)) {
+ LINFO(curlun, "unable to open backing file: %s\n", filename);
+ return PTR_ERR(filp);
+ }
+
+ if (!(filp->f_mode & FMODE_WRITE))
+ ro = 1;
+
+ if (filp->f_path.dentry)
+ inode = filp->f_path.dentry->d_inode;
+ if (inode && S_ISBLK(inode->i_mode)) {
+ if (bdev_read_only(inode->i_bdev))
+ ro = 1;
+ } else if (!inode || !S_ISREG(inode->i_mode)) {
+ LINFO(curlun, "invalid file type: %s\n", filename);
+ goto out;
+ }
+
+ /*
+ * If we can't read the file, it's no good.
+ * If we can't write the file, use it read-only.
+ */
+ if (!filp->f_op || !(filp->f_op->read || filp->f_op->aio_read)) {
+ LINFO(curlun, "file not readable: %s\n", filename);
+ goto out;
+ }
+ if (!(filp->f_op->write || filp->f_op->aio_write))
+ ro = 1;
+
+ size = i_size_read(inode->i_mapping->host);
+ if (size < 0) {
+ LINFO(curlun, "unable to find file size: %s\n", filename);
+ rc = (int) size;
+ goto out;
+ }
+ num_sectors = size >> 9; /* File size in 512-byte blocks */
+ min_sectors = 1;
+ if (curlun->cdrom) {
+ num_sectors &= ~3; /* Reduce to a multiple of 2048 */
+ min_sectors = 300*4; /* Smallest track is 300 frames */
+ if (num_sectors >= 256*60*75*4) {
+ num_sectors = (256*60*75 - 1) * 4;
+ LINFO(curlun, "file too big: %s\n", filename);
+ LINFO(curlun, "using only first %d blocks\n",
+ (int) num_sectors);
+ }
+ }
+ if (num_sectors < min_sectors) {
+ LINFO(curlun, "file too small: %s\n", filename);
+ rc = -ETOOSMALL;
+ goto out;
+ }
+
+ get_file(filp);
+ curlun->ro = ro;
+ curlun->filp = filp;
+ curlun->file_length = size;
+ curlun->num_sectors = num_sectors;
+ LDBG(curlun, "open backing file: %s\n", filename);
+ rc = 0;
+
+out:
+ filp_close(filp, current->files);
+ return rc;
+}
+
+
+static void fsg_lun_close(struct fsg_lun *curlun)
+{
+ if (curlun->filp) {
+ LDBG(curlun, "close backing file\n");
+ fput(curlun->filp);
+ curlun->filp = NULL;
+ }
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Sync the file data, don't bother with the metadata.
+ * This code was copied from fs/buffer.c:sys_fdatasync().
+ */
+static int fsg_lun_fsync_sub(struct fsg_lun *curlun)
+{
+ struct file *filp = curlun->filp;
+
+ if (curlun->ro || !filp)
+ return 0;
+ return vfs_fsync(filp, 1);
+}
+
+static void store_cdrom_address(u8 *dest, int msf, u32 addr)
+{
+ if (msf) {
+ /* Convert to Minutes-Seconds-Frames */
+ addr >>= 2; /* Convert to 2048-byte frames */
+ addr += 2*75; /* Lead-in occupies 2 seconds */
+ dest[3] = addr % 75; /* Frames */
+ addr /= 75;
+ dest[2] = addr % 60; /* Seconds */
+ addr /= 60;
+ dest[1] = addr; /* Minutes */
+ dest[0] = 0; /* Reserved */
+ } else {
+ /* Absolute sector */
+ put_unaligned_be32(addr, dest);
+ }
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+
+static ssize_t fsg_show_ro(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+
+ return sprintf(buf, "%d\n", fsg_lun_is_open(curlun)
+ ? curlun->ro
+ : curlun->initially_ro);
+}
+
+static ssize_t fsg_show_nofua(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+
+ return sprintf(buf, "%u\n", curlun->nofua);
+}
+
+static ssize_t fsg_show_file(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ struct rw_semaphore *filesem = dev_get_drvdata(dev);
+ char *p;
+ ssize_t rc;
+
+ down_read(filesem);
+ if (fsg_lun_is_open(curlun)) { /* Get the complete pathname */
+ p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
+ if (IS_ERR(p))
+ rc = PTR_ERR(p);
+ else {
+ rc = strlen(p);
+ memmove(buf, p, rc);
+ buf[rc] = '\n'; /* Add a newline */
+ buf[++rc] = 0;
+ }
+ } else { /* No file, return 0 bytes */
+ *buf = 0;
+ rc = 0;
+ }
+ up_read(filesem);
+ return rc;
+}
+
+
+static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ ssize_t rc = count;
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ struct rw_semaphore *filesem = dev_get_drvdata(dev);
+ unsigned long ro;
+
+ if (strict_strtoul(buf, 2, &ro))
+ return -EINVAL;
+
+ /*
+ * Allow the write-enable status to change only while the
+ * backing file is closed.
+ */
+ down_read(filesem);
+ if (fsg_lun_is_open(curlun)) {
+ LDBG(curlun, "read-only status change prevented\n");
+ rc = -EBUSY;
+ } else {
+ curlun->ro = ro;
+ curlun->initially_ro = ro;
+ LDBG(curlun, "read-only status set to %d\n", curlun->ro);
+ }
+ up_read(filesem);
+ return rc;
+}
+
+static ssize_t fsg_store_nofua(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ unsigned long nofua;
+
+ if (strict_strtoul(buf, 2, &nofua))
+ return -EINVAL;
+
+ /* Sync data when switching from async mode to sync */
+ if (!nofua && curlun->nofua)
+ fsg_lun_fsync_sub(curlun);
+
+ curlun->nofua = nofua;
+
+ return count;
+}
+
+static ssize_t fsg_store_file(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct fsg_lun *curlun = fsg_lun_from_dev(dev);
+ struct rw_semaphore *filesem = dev_get_drvdata(dev);
+ int rc = 0;
+
+#ifdef CONFIG_ARCH_RK29
+ printk("store_file: \"%s\"\n", buf);
+#endif
+
+#ifndef CONFIG_USB_ANDROID_MASS_STORAGE
+ /* disabled in android because we need to allow closing the backing file
+ * if the media was removed
+ */
+ if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {
+ LDBG(curlun, "eject attempt prevented\n");
+ return -EBUSY; /* "Door is locked" */
+ }
+#endif
+
+ /* Remove a trailing newline */
+ if (count > 0 && buf[count-1] == '\n')
+ ((char *) buf)[count-1] = 0; /* Ugh! */
+
+ /* Eject current medium */
+ down_write(filesem);
+ if (fsg_lun_is_open(curlun)) {
+ fsg_lun_close(curlun);
+ curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
+ }
+
+ /* Load new medium */
+ if (count > 0 && buf[0]) {
+ rc = fsg_lun_open(curlun, buf);
+ if (rc == 0)
+ curlun->unit_attention_data =
+ SS_NOT_READY_TO_READY_TRANSITION;
+ }
+ up_write(filesem);
+ return (rc < 0 ? rc : count);
+}
projects / firefly-linux-kernel-4.4.55.git / commitdiff