diff options
| -rw-r--r-- | Documentation/usb/usb-serial.txt | 16 | ||||
| -rw-r--r-- | drivers/usb/serial/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/usb/serial/mos7720.c | 806 |
3 files changed, 747 insertions, 86 deletions
diff --git a/Documentation/usb/usb-serial.txt b/Documentation/usb/usb-serial.txt index 540c91ccf86f..f4d214510259 100644 --- a/Documentation/usb/usb-serial.txt +++ b/Documentation/usb/usb-serial.txt @@ -440,6 +440,22 @@ Winchiphead CH341 Driver For any questions or problems with this driver, please contact frank@kingswood-consulting.co.uk. +Moschip MCS7720, MCS7715 driver + + These chips are present in devices sold by various manufacturers, such as Syba + and Cables Unlimited. There may be others. The 7720 provides two serial + ports, and the 7715 provides one serial and one standard PC parallel port. + Support for the 7715's parallel port is enabled by a separate option, which + will not appear unless parallel port support is first enabled at the top-level + of the Device Drivers config menu. Currently only compatibility mode is + supported on the parallel port (no ECP/EPP). + + TODO: + - Implement ECP/EPP modes for the parallel port. + - Baud rates higher than 115200 are currently broken. + - Devices with a single serial port based on the Moschip MCS7703 may work + with this driver with a simple addition to the usb_device_id table. I + don't have one of these devices, so I can't say for sure. Generic Serial driver diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig index efb6dc7aa450..a0b2247eeaa1 100644 --- a/drivers/usb/serial/Kconfig +++ b/drivers/usb/serial/Kconfig @@ -425,6 +425,17 @@ config USB_SERIAL_MOS7720 To compile this driver as a module, choose M here: the module will be called mos7720. +if USB_SERIAL_MOS7720 +config USB_SERIAL_MOS7715_PARPORT + bool "Support for parallel port on the Moschip 7715" + select PARPORT_NOT_PC + depends on PARPORT + ---help--- + Say Y if you have a Moschip 7715 device and would like to use + the parallel port it provides. The port will register with + the parport subsystem as a low-level driver. +endif + config USB_SERIAL_MOS7840 tristate "USB Moschip 7840/7820 USB Serial Driver" ---help--- diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index 0d47f2c4d59f..2d35d11d04e3 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -34,12 +34,12 @@ #include <linux/usb.h> #include <linux/usb/serial.h> #include <linux/uaccess.h> - +#include <linux/parport.h> /* * Version Information */ -#define DRIVER_VERSION "1.0.0.4F" +#define DRIVER_VERSION "2.0" #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." #define DRIVER_DESC "Moschip USB Serial Driver" @@ -63,7 +63,7 @@ #define NUM_URBS 16 /* URB Count */ #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ -/* This structure holds all of the local port information */ +/* This structure holds all of the local serial port information */ struct moschip_port { __u8 shadowLCR; /* last LCR value received */ __u8 shadowMCR; /* last MCR value received */ @@ -74,11 +74,6 @@ struct moschip_port { struct urb *write_urb_pool[NUM_URBS]; }; -/* This structure holds all of the individual serial device information */ -struct moschip_serial { - int interrupt_started; -}; - static int debug; static struct usb_serial_driver moschip7720_2port_driver; @@ -94,6 +89,649 @@ static const struct usb_device_id moschip_port_id_table[] = { }; MODULE_DEVICE_TABLE(usb, moschip_port_id_table); +#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT + +/* initial values for parport regs */ +#define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ +#define ECR_INIT_VAL 0x00 /* SPP mode */ + +struct urbtracker { + struct mos7715_parport *mos_parport; + struct list_head urblist_entry; + struct kref ref_count; + struct urb *urb; +}; + +enum mos7715_pp_modes { + SPP = 0<<5, + PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ + PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ +}; + +struct mos7715_parport { + struct parport *pp; /* back to containing struct */ + struct kref ref_count; /* to instance of this struct */ + struct list_head deferred_urbs; /* list deferred async urbs */ + struct list_head active_urbs; /* list async urbs in flight */ + spinlock_t listlock; /* protects list access */ + bool msg_pending; /* usb sync call pending */ + struct completion syncmsg_compl; /* usb sync call completed */ + struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ + struct usb_serial *serial; /* back to containing struct */ + __u8 shadowECR; /* parallel port regs... */ + __u8 shadowDCR; + atomic_t shadowDSR; /* updated in int-in callback */ +}; + +/* lock guards against dereferencing NULL ptr in parport ops callbacks */ +static DEFINE_SPINLOCK(release_lock); + +enum mos_regs { + THR, /* serial port regs */ + RHR, + IER, + FCR, + ISR, + LCR, + MCR, + LSR, + MSR, + SPR, + DLL, + DLM, + DPR, /* parallel port regs */ + DSR, + DCR, + ECR, + SP1_REG, /* device control regs */ + SP2_REG, /* serial port 2 (7720 only) */ + PP_REG, + SP_CONTROL_REG, +}; + +/* + * Return the correct value for the Windex field of the setup packet + * for a control endpoint message. See the 7715 datasheet. + */ +static inline __u16 get_reg_index(enum mos_regs reg) +{ + static const __u16 mos7715_index_lookup_table[] = { + 0x00, /* THR */ + 0x00, /* RHR */ + 0x01, /* IER */ + 0x02, /* FCR */ + 0x02, /* ISR */ + 0x03, /* LCR */ + 0x04, /* MCR */ + 0x05, /* LSR */ + 0x06, /* MSR */ + 0x07, /* SPR */ + 0x00, /* DLL */ + 0x01, /* DLM */ + 0x00, /* DPR */ + 0x01, /* DSR */ + 0x02, /* DCR */ + 0x0a, /* ECR */ + 0x01, /* SP1_REG */ + 0x02, /* SP2_REG (7720 only) */ + 0x04, /* PP_REG (7715 only) */ + 0x08, /* SP_CONTROL_REG */ + }; + return mos7715_index_lookup_table[reg]; +} + +/* + * Return the correct value for the upper byte of the Wvalue field of + * the setup packet for a control endpoint message. + */ +static inline __u16 get_reg_value(enum mos_regs reg) +{ + if (reg >= SP1_REG) /* control reg */ + return 0x0000; + else /* parallel port reg (7715 only) */ + return 0x0100; +} + +/* + * Write data byte to the specified device register. The data is embedded in + * the value field of the setup packet. + */ +static int write_parport_reg(struct mos7715_parport *mos_parport, + enum mos_regs reg, __u8 data) +{ + struct usb_serial *serial = mos_parport->serial; + struct usb_device *usbdev = serial->dev; + unsigned int pipe = usb_sndctrlpipe(usbdev, 0); + __u8 request = (__u8)0x0e; + __u8 requesttype = (__u8)0x40; + __u16 value = get_reg_value(reg) + data; + __u16 index = get_reg_index(reg); + __u16 size = 0; + int status; + status = usb_control_msg(usbdev, pipe, request, requesttype, value, + index, NULL, size, MOS_WDR_TIMEOUT); + if (status < 0) + dev_err(&usbdev->dev, + "mos7720: usb_control_msg() failed: %d", status); + return status; +} + +/* + * Read data byte from the specified device register. The data returned by the + * device is embedded in the value field of the setup packet. + */ +static int read_parport_reg(struct mos7715_parport *mos_parport, + enum mos_regs reg, __u8 *data) +{ + struct usb_device *usbdev = mos_parport->serial->dev; + unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); + __u8 request = (__u8)0x0d; + __u8 requesttype = (__u8)0xc0; + __u16 value = get_reg_value(reg); + __u16 index = get_reg_index(reg); + __u16 size = 1; + int status = usb_control_msg(usbdev, pipe, request, requesttype, value, + index, data, size, MOS_WDR_TIMEOUT); + if (status < 0) + dev_err(&usbdev->dev, + "mos7720: usb_control_msg() failed: %d", status); + return status; +} + +static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, + enum mos7715_pp_modes mode) +{ + mos_parport->shadowECR = mode; + write_parport_reg(mos_parport, ECR, mos_parport->shadowECR); + return 0; +} + +static void destroy_mos_parport(struct kref *kref) +{ + struct mos7715_parport *mos_parport = + container_of(kref, struct mos7715_parport, ref_count); + + dbg("%s called", __func__); + kfree(mos_parport); +} + +static void destroy_urbtracker(struct kref *kref) +{ + struct urbtracker *urbtrack = + container_of(kref, struct urbtracker, ref_count); + struct mos7715_parport *mos_parport = urbtrack->mos_parport; + dbg("%s called", __func__); + usb_free_urb(urbtrack->urb); + kfree(urbtrack); + kref_put(&mos_parport->ref_count, destroy_mos_parport); +} + +/* + * This runs as a tasklet when sending an urb in a non-blocking parallel + * port callback had to be deferred because the disconnect mutex could not be + * obtained at the time. + */ +static void send_deferred_urbs(unsigned long _mos_parport) +{ + int ret_val; + unsigned long flags; + struct mos7715_parport *mos_parport = (void *)_mos_parport; + struct urbtracker *urbtrack; + struct list_head *cursor, *next; + + dbg("%s called", __func__); + + /* if release function ran, game over */ + if (unlikely(mos_parport->serial == NULL)) + return; + + /* try again to get the mutex */ + if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { + dbg("%s: rescheduling tasklet", __func__); + tasklet_schedule(&mos_parport->urb_tasklet); + return; + } + + /* if device disconnected, game over */ + if (unlikely(mos_parport->serial->disconnected)) { + mutex_unlock(&mos_parport->serial->disc_mutex); + return; + } + + spin_lock_irqsave(&mos_parport->listlock, flags); + if (list_empty(&mos_parport->deferred_urbs)) { + spin_unlock_irqrestore(&mos_parport->listlock, flags); + mutex_unlock(&mos_parport->serial->disc_mutex); + dbg("%s: deferred_urbs list empty", __func__); + return; + } + + /* move contents of deferred_urbs list to active_urbs list and submit */ + list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) + list_move_tail(cursor, &mos_parport->active_urbs); + list_for_each_entry(urbtrack, &mos_parport->active_urbs, + urblist_entry) { + ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); + dbg("%s: urb submitted", __func__); + if (ret_val) { + dev_err(&mos_parport->serial->dev->dev, + "usb_submit_urb() failed: %d", ret_val); + list_del(&urbtrack->urblist_entry); + kref_put(&urbtrack->ref_count, destroy_urbtracker); + } + } + spin_unlock_irqrestore(&mos_parport->listlock, flags); + mutex_unlock(&mos_parport->serial->disc_mutex); +} + +/* callback for parallel port control urbs submitted asynchronously */ +static void async_complete(struct urb *urb) +{ + struct urbtracker *urbtrack = urb->context; + int status = urb->status; + dbg("%s called", __func__); + if (unlikely(status)) + dbg("%s - nonzero urb status received: %d", __func__, status); + + /* remove the urbtracker from the active_urbs list */ + spin_lock(&urbtrack->mos_parport->listlock); + list_del(&urbtrack->urblist_entry); + spin_unlock(&urbtrack->mos_parport->listlock); + kref_put(&urbtrack->ref_count, destroy_urbtracker); +} + +static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, + enum mos_regs reg, __u8 data) +{ + struct urbtracker *urbtrack; + int ret_val; + unsigned long flags; + struct usb_ctrlrequest setup; + struct usb_serial *serial = mos_parport->serial; + struct usb_device *usbdev = serial->dev; + dbg("%s called", __func__); + + /* create and initialize the control urb and containing urbtracker */ + urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); + if (urbtrack == NULL) { + dev_err(&usbdev->dev, "out of memory"); + return -ENOMEM; + } + kref_get(&mos_parport->ref_count); + urbtrack->mos_parport = mos_parport; + urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); + if (urbtrack->urb == NULL) { + dev_err(&usbdev->dev, "out of urbs"); + kfree(urbtrack); + return -ENOMEM; + } + setup.bRequestType = (__u8)0x40; + setup.bRequest = (__u8)0x0e; + setup.wValue = get_reg_value(reg); + setup.wIndex = get_reg_index(reg); + setup.wLength = 0; + usb_fill_control_urb(urbtrack->urb, usbdev, + usb_sndctrlpipe(usbdev, 0), + (unsigned char *)&setup, + NULL, 0, async_complete, urbtrack); + kref_init(&urbtrack->ref_count); + INIT_LIST_HEAD(&urbtrack->urblist_entry); + + /* + * get the disconnect mutex, or add tracker to the deferred_urbs list + * and schedule a tasklet to try again later + */ + if (!mutex_trylock(&serial->disc_mutex)) { + spin_lock_irqsave(&mos_parport->listlock, flags); + list_add_tail(&urbtrack->urblist_entry, + &mos_parport->deferred_urbs); + spin_unlock_irqrestore(&mos_parport->listlock, flags); + tasklet_schedule(&mos_parport->urb_tasklet); + dbg("tasklet scheduled"); + return 0; + } + + /* bail if device disconnected */ + if (serial->disconnected) { + kref_put(&urbtrack->ref_count, destroy_urbtracker); + mutex_unlock(&serial->disc_mutex); + return -ENODEV; + } + + /* add the tracker to the active_urbs list and submit */ + spin_lock_irqsave(&mos_parport->listlock, flags); + list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); + spin_unlock_irqrestore(&mos_parport->listlock, flags); + ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); + mutex_unlock(&serial->disc_mutex); + if (ret_val) { + dev_err(&usbdev->dev, + "%s: submit_urb() failed: %d", __func__, ret_val); + spin_lock_irqsave(&mos_parport->listlock, flags); + list_del(&urbtrack->urblist_entry); + spin_unlock_irqrestore(&mos_parport->listlock, flags); + kref_put(&urbtrack->ref_count, destroy_urbtracker); + return ret_val; + } + return 0; +} + +/* + * This is the the common top part of all parallel port callback operations that + * send synchronous messages to the device. This implements convoluted locking + * that avoids two scenarios: (1) a port operation is called after usbserial + * has called our release function, at which point struct mos7715_parport has + * been destroyed, and (2) the device has been disconnected, but usbserial has + * not called the release function yet because someone has a serial port open. + * The shared release_lock prevents the first, and the mutex and disconnected + * flag maintained by usbserial covers the second. We also use the msg_pending + * flag to ensure that all synchronous usb messgage calls have completed before + * our release function can return. + */ +static int parport_prologue(struct parport *pp) +{ + struct mos7715_parport *mos_parport; + + spin_lock(&release_lock); + mos_parport = pp->private_data; + if (unlikely(mos_parport == NULL)) { + /* release fn called, port struct destroyed */ + spin_unlock(&release_lock); + return -1; + } + mos_parport->msg_pending = true; /* synch usb call pending */ + INIT_COMPLETION(mos_parport->syncmsg_compl); + spin_unlock(&release_lock); + + mutex_lock(&mos_parport->serial->disc_mutex); + if (mos_parport->serial->disconnected) { + /* device disconnected */ + mutex_unlock(&mos_parport->serial->disc_mutex); + mos_parport->msg_pending = false; + complete(&mos_parport->syncmsg_compl); + return -1; + } + + return 0; +} + +/* + * This is the the common bottom part of all parallel port functions that send + * synchronous messages to the device. + */ +static inline void parport_epilogue(struct parport *pp) +{ + struct mos7715_parport *mos_parport = pp->private_data; + mutex_unlock(&mos_parport->serial->disc_mutex); + mos_parport->msg_pending = false; + complete(&mos_parport->syncmsg_compl); +} + +static void parport_mos7715_write_data(struct parport *pp, unsigned char d) +{ + struct mos7715_parport *mos_parport = pp->private_data; + dbg("%s called: %2.2x", __func__, d); + if (parport_prologue(pp) < 0) + return; + mos7715_change_mode(mos_parport, SPP); + write_parport_reg(mos_parport, DPR, (__u8)d); + parport_epilogue(pp); +} + +static unsigned char parport_mos7715_read_data(struct parport *pp) +{ + struct mos7715_parport *mos_parport = pp->private_data; + unsigned char d; + dbg("%s called", __func__); + if (parport_prologue(pp) < 0) + return 0; + read_parport_reg(mos_parport, DPR, &d); + parport_epilogue(pp); + return d; +} + +static void parport_mos7715_write_control(struct parport *pp, unsigned char d) +{ + struct mos7715_parport *mos_parport = pp->private_data; + __u8 data; + dbg("%s called: %2.2x", __func__, d); + if (parport_prologue(pp) < 0) + return; + data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); + write_parport_reg(mos_parport, DCR, data); + mos_parport->shadowDCR = data; + parport_epilogue(pp); +} + +static unsigned char parport_mos7715_read_control(struct parport *pp) +{ + struct mos7715_parport *mos_parport = pp->private_data; + __u8 dcr; + dbg("%s called", __func__); + spin_lock(&release_lock); + mos_parport = pp->private_data; + if (unlikely(mos_parport == NULL)) { + spin_unlock(&release_lock); + return 0; + } + dcr = mos_parport->shadowDCR & 0x0f; + spin_unlock(&release_lock); + return dcr; +} + +static unsigned char parport_mos7715_frob_control(struct parport *pp, + unsigned char mask, + unsigned char val) +{ + struct mos7715_parport *mos_parport = pp->private_data; + __u8 dcr; + dbg("%s called", __func__); + mask &= 0x0f; + val &= 0x0f; + if (parport_prologue(pp) < 0) + return 0; + mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; + write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); + dcr = mos_parport->shadowDCR & 0x0f; + parport_epilogue(pp); + return dcr; +} + +static unsigned char parport_mos7715_read_status(struct parport *pp) +{ + unsigned char status; + struct mos7715_parport *mos_parport = pp->private_data; + dbg("%s called", __func__); + spin_lock(&release_lock); + mos_parport = pp->private_data; + if (unlikely(mos_parport == NULL)) { /* release called */ + spin_unlock(&release_lock); + return 0; + } + status = atomic_read(&mos_parport->shadowDSR) & 0xf8; + spin_unlock(&release_lock); + return status; +} + +static void parport_mos7715_enable_irq(struct parport *pp) +{ + dbg("%s called", __func__); +} +static void parport_mos7715_disable_irq(struct parport *pp) +{ + dbg("%s called", __func__); +} + +static void parport_mos7715_data_forward(struct parport *pp) +{ + struct mos7715_parport *mos_parport = pp->private_data; + dbg("%s called", __func__); + if (parport_prologue(pp) < 0) + return; + mos7715_change_mode(mos_parport, PS2); + mos_parport->shadowDCR &= ~0x20; + write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); + parport_epilogue(pp); +} + +static void parport_mos7715_data_reverse(struct parport *pp) +{ + struct mos7715_parport *mos_parport = pp->private_data; + dbg("%s called", __func__); + if (parport_prologue(pp) < 0) + return; + mos7715_change_mode(mos_parport, PS2); + mos_parport->shadowDCR |= 0x20; + write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); + parport_epilogue(pp); +} + +static void parport_mos7715_init_state(struct pardevice *dev, + struct parport_state *s) +{ + dbg("%s called", __func__); + s->u.pc.ctr = DCR_INIT_VAL; + s->u.pc.ecr = ECR_INIT_VAL; +} + +/* N.B. Parport core code requires that this function not block */ +static void parport_mos7715_save_state(struct parport *pp, + struct parport_state *s) +{ + struct mos7715_parport *mos_parport; + dbg("%s called", __func__); + spin_lock(&release_lock); + mos_parport = pp->private_data; + if (unlikely(mos_parport == NULL)) { /* release called */ + spin_unlock(&release_lock); + return; + } + s->u.pc.ctr = mos_parport->shadowDCR; + s->u.pc.ecr = mos_parport->shadowECR; + spin_unlock(&release_lock); +} + +/* N.B. Parport core code requires that this function not block */ +static void parport_mos7715_restore_state(struct parport *pp, + struct parport_state *s) +{ + struct mos7715_parport *mos_parport; + dbg("%s called", __func__); + spin_lock(&release_lock); + mos_parport = pp->private_data; + if (unlikely(mos_parport == NULL)) { /* release called */ + spin_unlock(&release_lock); + return; + } + write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR); + write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR); + spin_unlock(&release_lock); +} + +static size_t parport_mos7715_write_compat(struct parport *pp, + const void *buffer, + size_t len, int flags) +{ + int retval; + struct mos7715_parport *mos_parport = pp->private_data; + int actual_len; + dbg("%s called: %u chars", __func__, (unsigned int)len); + if (parport_prologue(pp) < 0) + return 0; + mos7715_change_mode(mos_parport, PPF); + retval = usb_bulk_msg(mos_parport->serial->dev, + usb_sndbulkpipe(mos_parport->serial->dev, 2), + (void *)buffer, len, &actual_len, + MOS_WDR_TIMEOUT); + parport_epilogue(pp); + if (retval) { + dev_err(&mos_parport->serial->dev->dev, + "mos7720: usb_bulk_msg() failed: %d", retval); + return 0; + } + return actual_len; +} + +static struct parport_operations parport_mos7715_ops = { + .owner = THIS_MODULE, + .write_data = parport_mos7715_write_data, + .read_data = parport_mos7715_read_data, + + .write_control = parport_mos7715_write_control, + .read_control = parport_mos7715_read_control, + .frob_control = parport_mos7715_frob_control, + + .read_status = parport_mos7715_read_status, + + .enable_irq = parport_mos7715_enable_irq, + .disable_irq = parport_mos7715_disable_irq, + + .data_forward = parport_mos7715_data_forward, + .data_reverse = parport_mos7715_data_reverse, + + .init_state = parport_mos7715_init_state, + .save_state = parport_mos7715_save_state, + .restore_state = parport_mos7715_restore_state, + + .compat_write_data = parport_mos7715_write_compat, + + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, +}; + +/* + * Allocate and initialize parallel port control struct, initialize + * the parallel port hardware device, and register with the parport subsystem. + */ +static int mos7715_parport_init(struct usb_serial *serial) +{ + struct mos7715_parport *mos_parport; + + /* allocate and initialize parallel port control struct */ + mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); + if (mos_parport == NULL) { + dbg("mos7715_parport_init: kzalloc failed"); + return -ENOMEM; + } + mos_parport->msg_pending = false; + kref_init(&mos_parport->ref_count); + spin_lock_init(&mos_parport->listlock); + INIT_LIST_HEAD(&mos_parport->active_urbs); + INIT_LIST_HEAD(&mos_parport->deferred_urbs); + usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ + mos_parport->serial = serial; + tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, + (unsigned long) mos_parport); + init_completion(&mos_parport->syncmsg_compl); + + /* cycle parallel port reset bit */ + write_parport_reg(mos_parport, PP_REG, (__u8)0x80); + write_parport_reg(mos_parport, PP_REG, (__u8)0x00); + + /* initialize device registers */ + mos_parport->shadowDCR = DCR_INIT_VAL; + write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); + mos_parport->shadowECR = ECR_INIT_VAL; + write_parport_reg(mos_parport, ECR, mos_parport->shadowECR); + + /* register with parport core */ + mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, + PARPORT_DMA_NONE, + &parport_mos7715_ops); + if (mos_parport->pp == NULL) { + dev_err(&serial->interface->dev, + "Could not register parport\n"); + kref_put(&mos_parport->ref_count, destroy_mos_parport); + return -EIO; + } + mos_parport->pp->private_data = mos_parport; + mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; + mos_parport->pp->dev = &serial->interface->dev; + parport_announce_port(mos_parport->pp); + + return 0; +} +#endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ /* * mos7720_interrupt_callback @@ -109,8 +747,6 @@ static void mos7720_interrupt_callback(struct urb *urb) __u8 sp1; __u8 sp2; - dbg(" : Entering"); - switch (status) { case 0: /* success */ @@ -118,6 +754,7 @@ static void mos7720_interrupt_callback(struct urb *urb) case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: + case -ENODEV: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __func__, status); @@ -161,7 +798,7 @@ static void mos7720_interrupt_callback(struct urb *urb) dbg("Serial Port 1: Receiver time out"); break; case SERIAL_IIR_MS: - dbg("Serial Port 1: Modem status change"); + /* dbg("Serial Port 1: Modem status change"); */ break; } @@ -174,7 +811,7 @@ static void mos7720_interrupt_callback(struct urb *urb) dbg("Serial Port 2: Receiver time out"); break; case SERIAL_IIR_MS: - dbg("Serial Port 2: Modem status change"); + /* dbg("Serial Port 2: Modem status change"); */ break; } } @@ -208,6 +845,7 @@ static void mos7715_interrupt_callback(struct urb *urb) case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: + case -ENODEV: /* this urb is terminated, clean up */ dbg("%s - urb shutting down with status: %d", __func__, status); @@ -243,11 +881,21 @@ static void mos7715_interrupt_callback(struct urb *urb) dbg("Serial Port: Receiver time out"); break; case SERIAL_IIR_MS: - dbg("Serial Port: Modem status change"); + /* dbg("Serial Port: Modem status change"); */ break; } } +#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT + { /* update local copy of DSR reg */ + struct usb_serial_port *port = urb->context; + struct mos7715_parport *mos_parport = port->serial->private; + if (unlikely(mos_parport == NULL)) + return; + atomic_set(&mos_parport->shadowDSR, data[2]); + } +#endif + exit: result = usb_submit_urb(urb, GFP_ATOMIC); if (result) @@ -267,7 +915,6 @@ static void mos7720_bulk_in_callback(struct urb *urb) int retval; unsigned char *data ; struct usb_serial_port *port; - struct moschip_port *mos7720_port; struct tty_struct *tty; int status = urb->status; @@ -276,13 +923,7 @@ static void mos7720_bulk_in_callback(struct urb *urb) return; } - mos7720_port = urb->context; - if (!mos7720_port) { - dbg("NULL mos7720_port pointer"); - return ; - } - - port = mos7720_port->port; + port = urb->context; dbg("Entering...%s", __func__); @@ -332,8 +973,6 @@ static void mos7720_bulk_out_data_callback(struct urb *urb) return ; } - dbg("Entering ........."); - tty = tty_port_tty_get(&mos7720_port->port->port); if (tty && mos7720_port->open) @@ -424,7 +1063,6 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) struct usb_serial *serial; struct usb_serial_port *port0; struct urb *urb; - struct moschip_serial *mos7720_serial; struct moschip_port *mos7720_port; int response; int port_number; @@ -440,11 +1078,6 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) port0 = serial->port[0]; - mos7720_serial = usb_get_serial_data(serial); - - if (mos7720_serial == NULL || port0 == NULL) - return -ENODEV; - usb_clear_halt(serial->dev, port->write_urb->pipe); usb_clear_halt(serial->dev, port->read_urb->pipe); @@ -549,43 +1182,6 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) data = 0x0c; send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); - /* see if we've set up our endpoint info yet * - * (can't set it up in mos7720_startup as the * - * structures were not set up at that time.) */ - if (!mos7720_serial->interrupt_started) { - dbg("Interrupt buffer NULL !!!"); - - /* not set up yet, so do it now */ - mos7720_serial->interrupt_started = 1; - - dbg("To Submit URB !!!"); - - /* set up our interrupt urb */ - usb_fill_int_urb(port0->interrupt_in_urb, serial->dev, - usb_rcvintpipe(serial->dev, - port->interrupt_in_endpointAddress), - port0->interrupt_in_buffer, - port0->interrupt_in_urb->transfer_buffer_length, - mos7720_interrupt_callback, mos7720_port, - port0->interrupt_in_urb->interval); - - /* start interrupt read for this mos7720 this interrupt * - * will continue as long as the mos7720 is connected */ - dbg("Submit URB over !!!"); - response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL); - if (response) - dev_err(&port->dev, - "%s - Error %d submitting control urb\n", - __func__, response); - } - - /* set up our bulk in urb */ - usb_fill_bulk_urb(port->read_urb, serial->dev, - usb_rcvbulkpipe(serial->dev, - port->bulk_in_endpointAddress), - port->bulk_in_buffer, - port->read_urb->transfer_buffer_length, - mos7720_bulk_in_callback, mos7720_port); response = usb_submit_urb(port->read_urb, GFP_KERNEL); if (response) dev_err(&port->dev, "%s - Error %d submitting read urb\n", @@ -897,6 +1493,7 @@ static void mos7720_unthrottle(struct tty_struct *tty) } } +/* FIXME: this function does not work */ static int set_higher_rates(struct moschip_port *mos7720_port, unsigned int baud) { @@ -939,6 +1536,7 @@ static int set_higher_rates(struct moschip_port *mos7720_port, * Set for higher rates * ***********************************************/ + /* writing baud rate verbatum into uart clock field clearly not right */ data = baud * 0x10; send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); @@ -1308,7 +1906,7 @@ static void mos7720_set_termios(struct tty_struct *tty, return; } - dbg("setting termios - ASPIRE"); + dbg("%s\n", "setting termios - ASPIRE"); cflag = tty->termios->c_cflag; @@ -1326,7 +1924,7 @@ static void mos7720_set_termios(struct tty_struct *tty, change_port_settings(tty, mos7720_port, old_termios); if (!port->read_urb) { - dbg("URB KILLED !!!!!"); + dbg("%s", "URB KILLED !!!!!"); return; } @@ -1590,12 +2188,12 @@ static int mos7720_ioctl(struct tty_struct *tty, struct file *file, static int mos7720_startup(struct usb_serial *serial) { - struct moschip_serial *mos7720_serial; struct moschip_port *mos7720_port; struct usb_device *dev; int i; char data; u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); + int ret_val; dbg("%s: Entering ..........", __func__); @@ -1606,15 +2204,6 @@ static int mos7720_startup(struct usb_serial *serial) dev = serial->dev; - /* create our private serial structure */ - mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL); - if (mos7720_serial == NULL) { - dev_err(&dev->dev, "%s - Out of memory\n", __func__); - return -ENOMEM; - } - - usb_set_serial_data(serial, mos7720_serial); - /* * The 7715 uses the first bulk in/out endpoint pair for the parallel * port, and the second for the serial port. Because the usbserial core @@ -1638,16 +2227,12 @@ static int mos7720_startup(struct usb_serial *serial) serial->port[1]->interrupt_in_buffer = NULL; } - /* we set up the pointers to the endpoints in the mos7720_open * - * function, as the structures aren't created yet. */ - /* set up port private structures */ + /* set up serial port private structures */ for (i = 0; i < serial->num_ports; ++i) { mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); if (mos7720_port == NULL) { dev_err(&dev->dev, "%s - Out of memory\n", __func__); - usb_set_serial_data(serial, NULL); - kfree(mos7720_serial); return -ENOMEM; } @@ -1669,6 +2254,20 @@ static int mos7720_startup(struct usb_serial *serial) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5*HZ); + /* start the interrupt urb */ + ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); + if (ret_val) + dev_err(&dev->dev, + "%s - Error %d submitting control urb\n", + __func__, ret_val); + +#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT + if (product == MOSCHIP_DEVICE_ID_7715) { + ret_val = mos7715_parport_init(serial); + if (ret_val < 0) + return ret_val; + } +#endif /* LSR For Port 1 */ send_mos_cmd(serial, MOS_READ, 0x00, UART_LSR, &data); dbg("LSR:%x", data); @@ -1684,12 +2283,47 @@ static void mos7720_release(struct usb_serial *serial) { int i; +#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT + /* close the parallel port */ + + if (le16_to_cpu(serial->dev->descriptor.idProduct) + == MOSCHIP_DEVICE_ID_7715) { + struct urbtracker *urbtrack; + unsigned long flags; + struct mos7715_parport *mos_parport = + usb_get_serial_data(serial); + + /* prevent NULL ptr dereference in port callbacks */ + spin_lock(&release_lock); + mos_parport->pp->private_data = NULL; + spin_unlock(&release_lock); + + /* wait for synchronous usb calls to return */ + if (mos_parport->msg_pending) + wait_for_completion_timeout(&mos_parport->syncmsg_compl, + MOS_WDR_TIMEOUT); + + parport_remove_port(mos_parport->pp); + usb_set_serial_data(serial, NULL); + mos_parport->serial = NULL; + + /* if tasklet currently scheduled, wait for it to complete */ + tasklet_kill(&mos_parport->urb_tasklet); + + /* unlink any urbs sent by the tasklet */ + spin_lock_irqsave(&mos_parport->listlock, flags); + list_for_each_entry(urbtrack, + &mos_parport->active_urbs, + urblist_entry) + usb_unlink_urb(urbtrack->urb); + spin_unlock_irqrestore(&mos_parport->listlock, flags); + + kref_put(&mos_parport->ref_count, destroy_mos_parport); + } +#endif /* free private structure allocated for serial port */ for (i = 0; i < serial->num_ports; ++i) kfree(usb_get_serial_port_data(serial->port[i])); - - /* free private structure allocated for serial device */ - kfree(usb_get_serial_data(serial)); } static struct usb_driver usb_driver = { |