| /* |
| * mos7720.c |
| * Controls the Moschip 7720 usb to dual port serial convertor |
| * |
| * Copyright 2006 Moschip Semiconductor Tech. Ltd. |
| * |
| * 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, version 2 of the License. |
| * |
| * Developed by: |
| * Vijaya Kumar <vijaykumar.gn@gmail.com> |
| * Ajay Kumar <naanuajay@yahoo.com> |
| * Gurudeva <ngurudeva@yahoo.com> |
| * |
| * Cleaned up from the original by: |
| * Greg Kroah-Hartman <gregkh@suse.de> |
| * |
| * Originally based on drivers/usb/serial/io_edgeport.c which is: |
| * Copyright (C) 2000 Inside Out Networks, All rights reserved. |
| * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> |
| */ |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/serial.h> |
| #include <linux/serial_reg.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| #include <linux/uaccess.h> |
| #include <linux/parport.h> |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_VERSION "2.1" |
| #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." |
| #define DRIVER_DESC "Moschip USB Serial Driver" |
| |
| /* default urb timeout */ |
| #define MOS_WDR_TIMEOUT 5000 |
| |
| #define MOS_MAX_PORT 0x02 |
| #define MOS_WRITE 0x0E |
| #define MOS_READ 0x0D |
| |
| /* Interrupt Rotinue Defines */ |
| #define SERIAL_IIR_RLS 0x06 |
| #define SERIAL_IIR_RDA 0x04 |
| #define SERIAL_IIR_CTI 0x0c |
| #define SERIAL_IIR_THR 0x02 |
| #define SERIAL_IIR_MS 0x00 |
| |
| #define NUM_URBS 16 /* URB Count */ |
| #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ |
| |
| /* 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 */ |
| __u8 shadowMSR; /* last MSR value received */ |
| char open; |
| struct async_icount icount; |
| struct usb_serial_port *port; /* loop back to the owner */ |
| struct urb *write_urb_pool[NUM_URBS]; |
| }; |
| |
| static bool debug; |
| |
| static struct usb_serial_driver moschip7720_2port_driver; |
| |
| #define USB_VENDOR_ID_MOSCHIP 0x9710 |
| #define MOSCHIP_DEVICE_ID_7720 0x7720 |
| #define MOSCHIP_DEVICE_ID_7715 0x7715 |
| |
| static const struct usb_device_id moschip_port_id_table[] = { |
| { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, |
| { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, |
| { } /* terminating entry */ |
| }; |
| 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; |
| struct usb_ctrlrequest *setup; |
| }; |
| |
| 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); |
| |
| #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ |
| |
| static const unsigned int dummy; /* for clarity in register access fns */ |
| |
| 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, |
| unsigned int serial_portnum) |
| { |
| if (reg >= SP1_REG) /* control reg */ |
| return 0x0000; |
| |
| else if (reg >= DPR) /* parallel port reg (7715 only) */ |
| return 0x0100; |
| |
| else /* serial port reg */ |
| return (serial_portnum + 2) << 8; |
| } |
| |
| /* |
| * Write data byte to the specified device register. The data is embedded in |
| * the value field of the setup packet. serial_portnum is ignored for registers |
| * not specific to a particular serial port. |
| */ |
| static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
| enum mos_regs reg, __u8 data) |
| { |
| struct usb_device *usbdev = serial->dev; |
| unsigned int pipe = usb_sndctrlpipe(usbdev, 0); |
| __u8 request = (__u8)0x0e; |
| __u8 requesttype = (__u8)0x40; |
| __u16 index = get_reg_index(reg); |
| __u16 value = get_reg_value(reg, serial_portnum) + data; |
| int status = usb_control_msg(usbdev, pipe, request, requesttype, value, |
| index, NULL, 0, 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. serial_portnum is |
| * ignored for registers that are not specific to a particular serial port. |
| */ |
| static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, |
| enum mos_regs reg, __u8 *data) |
| { |
| struct usb_device *usbdev = serial->dev; |
| unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); |
| __u8 request = (__u8)0x0d; |
| __u8 requesttype = (__u8)0xc0; |
| __u16 index = get_reg_index(reg); |
| __u16 value = get_reg_value(reg, serial_portnum); |
| u8 *buf; |
| int status; |
| |
| buf = kmalloc(1, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| status = usb_control_msg(usbdev, pipe, request, requesttype, value, |
| index, buf, 1, MOS_WDR_TIMEOUT); |
| if (status == 1) |
| *data = *buf; |
| else if (status < 0) |
| dev_err(&usbdev->dev, |
| "mos7720: usb_control_msg() failed: %d", status); |
| kfree(buf); |
| |
| return status; |
| } |
| |
| #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT |
| |
| static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, |
| enum mos7715_pp_modes mode) |
| { |
| mos_parport->shadowECR = mode; |
| write_mos_reg(mos_parport->serial, dummy, 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->setup); |
| 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_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; |
| } |
| urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_KERNEL); |
| if (!urbtrack->setup) { |
| usb_free_urb(urbtrack->urb); |
| kfree(urbtrack); |
| return -ENOMEM; |
| } |
| urbtrack->setup->bRequestType = (__u8)0x40; |
| urbtrack->setup->bRequest = (__u8)0x0e; |
| urbtrack->setup->wValue = get_reg_value(reg, dummy); |
| urbtrack->setup->wIndex = get_reg_index(reg); |
| urbtrack->setup->wLength = 0; |
| usb_fill_control_urb(urbtrack->urb, usbdev, |
| usb_sndctrlpipe(usbdev, 0), |
| (unsigned char *)urbtrack->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_mos_reg(mos_parport->serial, dummy, 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_mos_reg(mos_parport->serial, dummy, 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_mos_reg(mos_parport->serial, dummy, 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_mos_reg(mos_parport->serial, dummy, 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_mos_reg(mos_parport->serial, dummy, 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_mos_reg(mos_parport->serial, dummy, 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_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80); |
| write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00); |
| |
| /* initialize device registers */ |
| mos_parport->shadowDCR = DCR_INIT_VAL; |
| write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR); |
| mos_parport->shadowECR = ECR_INIT_VAL; |
| write_mos_reg(mos_parport->serial, dummy, 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 |
| * this is the callback function for when we have received data on the |
| * interrupt endpoint. |
| */ |
| static void mos7720_interrupt_callback(struct urb *urb) |
| { |
| int result; |
| int length; |
| int status = urb->status; |
| __u8 *data; |
| __u8 sp1; |
| __u8 sp2; |
| |
| switch (status) { |
| case 0: |
| /* success */ |
| break; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| /* this urb is terminated, clean up */ |
| dbg("%s - urb shutting down with status: %d", __func__, |
| status); |
| return; |
| default: |
| dbg("%s - nonzero urb status received: %d", __func__, |
| status); |
| goto exit; |
| } |
| |
| length = urb->actual_length; |
| data = urb->transfer_buffer; |
| |
| /* Moschip get 4 bytes |
| * Byte 1 IIR Port 1 (port.number is 0) |
| * Byte 2 IIR Port 2 (port.number is 1) |
| * Byte 3 -------------- |
| * Byte 4 FIFO status for both */ |
| |
| /* the above description is inverted |
| * oneukum 2007-03-14 */ |
| |
| if (unlikely(length != 4)) { |
| dbg("Wrong data !!!"); |
| return; |
| } |
| |
| sp1 = data[3]; |
| sp2 = data[2]; |
| |
| if ((sp1 | sp2) & 0x01) { |
| /* No Interrupt Pending in both the ports */ |
| dbg("No Interrupt !!!"); |
| } else { |
| switch (sp1 & 0x0f) { |
| case SERIAL_IIR_RLS: |
| dbg("Serial Port 1: Receiver status error or address " |
| "bit detected in 9-bit mode\n"); |
| break; |
| case SERIAL_IIR_CTI: |
| dbg("Serial Port 1: Receiver time out"); |
| break; |
| case SERIAL_IIR_MS: |
| /* dbg("Serial Port 1: Modem status change"); */ |
| break; |
| } |
| |
| switch (sp2 & 0x0f) { |
| case SERIAL_IIR_RLS: |
| dbg("Serial Port 2: Receiver status error or address " |
| "bit detected in 9-bit mode"); |
| break; |
| case SERIAL_IIR_CTI: |
| dbg("Serial Port 2: Receiver time out"); |
| break; |
| case SERIAL_IIR_MS: |
| /* dbg("Serial Port 2: Modem status change"); */ |
| break; |
| } |
| } |
| |
| exit: |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result) |
| dev_err(&urb->dev->dev, |
| "%s - Error %d submitting control urb\n", |
| __func__, result); |
| } |
| |
| /* |
| * mos7715_interrupt_callback |
| * this is the 7715's callback function for when we have received data on |
| * the interrupt endpoint. |
| */ |
| static void mos7715_interrupt_callback(struct urb *urb) |
| { |
| int result; |
| int length; |
| int status = urb->status; |
| __u8 *data; |
| __u8 iir; |
| |
| switch (status) { |
| case 0: |
| /* success */ |
| break; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| case -ENODEV: |
| /* this urb is terminated, clean up */ |
| dbg("%s - urb shutting down with status: %d", __func__, |
| status); |
| return; |
| default: |
| dbg("%s - nonzero urb status received: %d", __func__, |
| status); |
| goto exit; |
| } |
| |
| length = urb->actual_length; |
| data = urb->transfer_buffer; |
| |
| /* Structure of data from 7715 device: |
| * Byte 1: IIR serial Port |
| * Byte 2: unused |
| * Byte 2: DSR parallel port |
| * Byte 4: FIFO status for both */ |
| |
| if (unlikely(length != 4)) { |
| dbg("Wrong data !!!"); |
| return; |
| } |
| |
| iir = data[0]; |
| if (!(iir & 0x01)) { /* serial port interrupt pending */ |
| switch (iir & 0x0f) { |
| case SERIAL_IIR_RLS: |
| dbg("Serial Port: Receiver status error or address " |
| "bit detected in 9-bit mode\n"); |
| break; |
| case SERIAL_IIR_CTI: |
| dbg("Serial Port: Receiver time out"); |
| break; |
| case SERIAL_IIR_MS: |
| /* 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) |
| dev_err(&urb->dev->dev, |
| "%s - Error %d submitting control urb\n", |
| __func__, result); |
| } |
| |
| /* |
| * mos7720_bulk_in_callback |
| * this is the callback function for when we have received data on the |
| * bulk in endpoint. |
| */ |
| static void mos7720_bulk_in_callback(struct urb *urb) |
| { |
| int retval; |
| unsigned char *data ; |
| struct usb_serial_port *port; |
| struct tty_struct *tty; |
| int status = urb->status; |
| |
| if (status) { |
| dbg("nonzero read bulk status received: %d", status); |
| return; |
| } |
| |
| port = urb->context; |
| |
| dbg("Entering...%s", __func__); |
| |
| data = urb->transfer_buffer; |
| |
| tty = tty_port_tty_get(&port->port); |
| if (tty && urb->actual_length) { |
| tty_insert_flip_string(tty, data, urb->actual_length); |
| tty_flip_buffer_push(tty); |
| } |
| tty_kref_put(tty); |
| |
| if (port->read_urb->status != -EINPROGRESS) { |
| retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| if (retval) |
| dbg("usb_submit_urb(read bulk) failed, retval = %d", |
| retval); |
| } |
| } |
| |
| /* |
| * mos7720_bulk_out_data_callback |
| * this is the callback function for when we have finished sending serial |
| * data on the bulk out endpoint. |
| */ |
| static void mos7720_bulk_out_data_callback(struct urb *urb) |
| { |
| struct moschip_port *mos7720_port; |
| struct tty_struct *tty; |
| int status = urb->status; |
| |
| if (status) { |
| dbg("nonzero write bulk status received:%d", status); |
| return; |
| } |
| |
| mos7720_port = urb->context; |
| if (!mos7720_port) { |
| dbg("NULL mos7720_port pointer"); |
| return ; |
| } |
| |
| tty = tty_port_tty_get(&mos7720_port->port->port); |
| |
| if (tty && mos7720_port->open) |
| tty_wakeup(tty); |
| tty_kref_put(tty); |
| } |
| |
| /* |
| * mos77xx_probe |
| * this function installs the appropriate read interrupt endpoint callback |
| * depending on whether the device is a 7720 or 7715, thus avoiding costly |
| * run-time checks in the high-frequency callback routine itself. |
| */ |
| static int mos77xx_probe(struct usb_serial *serial, |
| const struct usb_device_id *id) |
| { |
| if (id->idProduct == MOSCHIP_DEVICE_ID_7715) |
| moschip7720_2port_driver.read_int_callback = |
| mos7715_interrupt_callback; |
| else |
| moschip7720_2port_driver.read_int_callback = |
| mos7720_interrupt_callback; |
| |
| return 0; |
| } |
| |
| static int mos77xx_calc_num_ports(struct usb_serial *serial) |
| { |
| u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); |
| if (product == MOSCHIP_DEVICE_ID_7715) |
| return 1; |
| |
| return 2; |
| } |
| |
| static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| struct usb_serial *serial; |
| struct urb *urb; |
| struct moschip_port *mos7720_port; |
| int response; |
| int port_number; |
| __u8 data; |
| int allocated_urbs = 0; |
| int j; |
| |
| serial = port->serial; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) |
| return -ENODEV; |
| |
| usb_clear_halt(serial->dev, port->write_urb->pipe); |
| usb_clear_halt(serial->dev, port->read_urb->pipe); |
| |
| /* Initialising the write urb pool */ |
| for (j = 0; j < NUM_URBS; ++j) { |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| mos7720_port->write_urb_pool[j] = urb; |
| |
| if (urb == NULL) { |
| dev_err(&port->dev, "No more urbs???\n"); |
| continue; |
| } |
| |
| urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
| GFP_KERNEL); |
| if (!urb->transfer_buffer) { |
| dev_err(&port->dev, |
| "%s-out of memory for urb buffers.\n", |
| __func__); |
| usb_free_urb(mos7720_port->write_urb_pool[j]); |
| mos7720_port->write_urb_pool[j] = NULL; |
| continue; |
| } |
| allocated_urbs++; |
| } |
| |
| if (!allocated_urbs) |
| return -ENOMEM; |
| |
| /* Initialize MCS7720 -- Write Init values to corresponding Registers |
| * |
| * Register Index |
| * 0 : THR/RHR |
| * 1 : IER |
| * 2 : FCR |
| * 3 : LCR |
| * 4 : MCR |
| * 5 : LSR |
| * 6 : MSR |
| * 7 : SPR |
| * |
| * 0x08 : SP1/2 Control Reg |
| */ |
| port_number = port->number - port->serial->minor; |
| read_mos_reg(serial, port_number, LSR, &data); |
| |
| dbg("SS::%p LSR:%x", mos7720_port, data); |
| |
| dbg("Check:Sending Command .........."); |
| |
| write_mos_reg(serial, dummy, SP1_REG, 0x02); |
| write_mos_reg(serial, dummy, SP2_REG, 0x02); |
| |
| write_mos_reg(serial, port_number, IER, 0x00); |
| write_mos_reg(serial, port_number, FCR, 0x00); |
| |
| write_mos_reg(serial, port_number, FCR, 0xcf); |
| mos7720_port->shadowLCR = 0x03; |
| write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
| mos7720_port->shadowMCR = 0x0b; |
| write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
| |
| write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00); |
| read_mos_reg(serial, dummy, SP_CONTROL_REG, &data); |
| data = data | (port->number - port->serial->minor + 1); |
| write_mos_reg(serial, dummy, SP_CONTROL_REG, data); |
| mos7720_port->shadowLCR = 0x83; |
| write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
| write_mos_reg(serial, port_number, THR, 0x0c); |
| write_mos_reg(serial, port_number, IER, 0x00); |
| mos7720_port->shadowLCR = 0x03; |
| write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
| write_mos_reg(serial, port_number, IER, 0x0c); |
| |
| response = usb_submit_urb(port->read_urb, GFP_KERNEL); |
| if (response) |
| dev_err(&port->dev, "%s - Error %d submitting read urb\n", |
| __func__, response); |
| |
| /* initialize our icount structure */ |
| memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount)); |
| |
| /* initialize our port settings */ |
| mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ |
| |
| /* send a open port command */ |
| mos7720_port->open = 1; |
| |
| return 0; |
| } |
| |
| /* |
| * mos7720_chars_in_buffer |
| * this function is called by the tty driver when it wants to know how many |
| * bytes of data we currently have outstanding in the port (data that has |
| * been written, but hasn't made it out the port yet) |
| * If successful, we return the number of bytes left to be written in the |
| * system, |
| * Otherwise we return a negative error number. |
| */ |
| static int mos7720_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| int i; |
| int chars = 0; |
| struct moschip_port *mos7720_port; |
| |
| dbg("%s:entering ...........", __func__); |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) { |
| dbg("%s:leaving ...........", __func__); |
| return 0; |
| } |
| |
| for (i = 0; i < NUM_URBS; ++i) { |
| if (mos7720_port->write_urb_pool[i] && |
| mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) |
| chars += URB_TRANSFER_BUFFER_SIZE; |
| } |
| dbg("%s - returns %d", __func__, chars); |
| return chars; |
| } |
| |
| static void mos7720_close(struct usb_serial_port *port) |
| { |
| struct usb_serial *serial; |
| struct moschip_port *mos7720_port; |
| int j; |
| |
| dbg("mos7720_close:entering..."); |
| |
| serial = port->serial; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) |
| return; |
| |
| for (j = 0; j < NUM_URBS; ++j) |
| usb_kill_urb(mos7720_port->write_urb_pool[j]); |
| |
| /* Freeing Write URBs */ |
| for (j = 0; j < NUM_URBS; ++j) { |
| if (mos7720_port->write_urb_pool[j]) { |
| kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); |
| usb_free_urb(mos7720_port->write_urb_pool[j]); |
| } |
| } |
| |
| /* While closing port, shutdown all bulk read, write * |
| * and interrupt read if they exists, otherwise nop */ |
| dbg("Shutdown bulk write"); |
| usb_kill_urb(port->write_urb); |
| dbg("Shutdown bulk read"); |
| usb_kill_urb(port->read_urb); |
| |
| mutex_lock(&serial->disc_mutex); |
| /* these commands must not be issued if the device has |
| * been disconnected */ |
| if (!serial->disconnected) { |
| write_mos_reg(serial, port->number - port->serial->minor, |
| MCR, 0x00); |
| write_mos_reg(serial, port->number - port->serial->minor, |
| IER, 0x00); |
| } |
| mutex_unlock(&serial->disc_mutex); |
| mos7720_port->open = 0; |
| |
| dbg("Leaving %s", __func__); |
| } |
| |
| static void mos7720_break(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| unsigned char data; |
| struct usb_serial *serial; |
| struct moschip_port *mos7720_port; |
| |
| dbg("Entering %s", __func__); |
| |
| serial = port->serial; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) |
| return; |
| |
| if (break_state == -1) |
| data = mos7720_port->shadowLCR | UART_LCR_SBC; |
| else |
| data = mos7720_port->shadowLCR & ~UART_LCR_SBC; |
| |
| mos7720_port->shadowLCR = data; |
| write_mos_reg(serial, port->number - port->serial->minor, |
| LCR, mos7720_port->shadowLCR); |
| } |
| |
| /* |
| * mos7720_write_room |
| * this function is called by the tty driver when it wants to know how many |
| * bytes of data we can accept for a specific port. |
| * If successful, we return the amount of room that we have for this port |
| * Otherwise we return a negative error number. |
| */ |
| static int mos7720_write_room(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port; |
| int room = 0; |
| int i; |
| |
| dbg("%s:entering ...........", __func__); |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) { |
| dbg("%s:leaving ...........", __func__); |
| return -ENODEV; |
| } |
| |
| /* FIXME: Locking */ |
| for (i = 0; i < NUM_URBS; ++i) { |
| if (mos7720_port->write_urb_pool[i] && |
| mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) |
| room += URB_TRANSFER_BUFFER_SIZE; |
| } |
| |
| dbg("%s - returns %d", __func__, room); |
| return room; |
| } |
| |
| static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, |
| const unsigned char *data, int count) |
| { |
| int status; |
| int i; |
| int bytes_sent = 0; |
| int transfer_size; |
| |
| struct moschip_port *mos7720_port; |
| struct usb_serial *serial; |
| struct urb *urb; |
| const unsigned char *current_position = data; |
| |
| dbg("%s:entering ...........", __func__); |
| |
| serial = port->serial; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) { |
| dbg("mos7720_port is NULL"); |
| return -ENODEV; |
| } |
| |
| /* try to find a free urb in the list */ |
| urb = NULL; |
| |
| for (i = 0; i < NUM_URBS; ++i) { |
| if (mos7720_port->write_urb_pool[i] && |
| mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { |
| urb = mos7720_port->write_urb_pool[i]; |
| dbg("URB:%d", i); |
| break; |
| } |
| } |
| |
| if (urb == NULL) { |
| dbg("%s - no more free urbs", __func__); |
| goto exit; |
| } |
| |
| if (urb->transfer_buffer == NULL) { |
| urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
| GFP_KERNEL); |
| if (urb->transfer_buffer == NULL) { |
| dev_err_console(port, "%s no more kernel memory...\n", |
| __func__); |
| goto exit; |
| } |
| } |
| transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
| |
| memcpy(urb->transfer_buffer, current_position, transfer_size); |
| usb_serial_debug_data(debug, &port->dev, __func__, transfer_size, |
| urb->transfer_buffer); |
| |
| /* fill urb with data and submit */ |
| usb_fill_bulk_urb(urb, serial->dev, |
| usb_sndbulkpipe(serial->dev, |
| port->bulk_out_endpointAddress), |
| urb->transfer_buffer, transfer_size, |
| mos7720_bulk_out_data_callback, mos7720_port); |
| |
| /* send it down the pipe */ |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (status) { |
| dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " |
| "with status = %d\n", __func__, status); |
| bytes_sent = status; |
| goto exit; |
| } |
| bytes_sent = transfer_size; |
| |
| exit: |
| return bytes_sent; |
| } |
| |
| static void mos7720_throttle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port; |
| int status; |
| |
| dbg("%s- port %d", __func__, port->number); |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| |
| if (mos7720_port == NULL) |
| return; |
| |
| if (!mos7720_port->open) { |
| dbg("port not opened"); |
| return; |
| } |
| |
| dbg("%s: Entering ..........", __func__); |
| |
| /* if we are implementing XON/XOFF, send the stop character */ |
| if (I_IXOFF(tty)) { |
| unsigned char stop_char = STOP_CHAR(tty); |
| status = mos7720_write(tty, port, &stop_char, 1); |
| if (status <= 0) |
| return; |
| } |
| |
| /* if we are implementing RTS/CTS, toggle that line */ |
| if (tty->termios->c_cflag & CRTSCTS) { |
| mos7720_port->shadowMCR &= ~UART_MCR_RTS; |
| write_mos_reg(port->serial, port->number - port->serial->minor, |
| MCR, mos7720_port->shadowMCR); |
| if (status != 0) |
| return; |
| } |
| } |
| |
| static void mos7720_unthrottle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
| int status; |
| |
| if (mos7720_port == NULL) |
| return; |
| |
| if (!mos7720_port->open) { |
| dbg("%s - port not opened", __func__); |
| return; |
| } |
| |
| dbg("%s: Entering ..........", __func__); |
| |
| /* if we are implementing XON/XOFF, send the start character */ |
| if (I_IXOFF(tty)) { |
| unsigned char start_char = START_CHAR(tty); |
| status = mos7720_write(tty, port, &start_char, 1); |
| if (status <= 0) |
| return; |
| } |
| |
| /* if we are implementing RTS/CTS, toggle that line */ |
| if (tty->termios->c_cflag & CRTSCTS) { |
| mos7720_port->shadowMCR |= UART_MCR_RTS; |
| write_mos_reg(port->serial, port->number - port->serial->minor, |
| MCR, mos7720_port->shadowMCR); |
| if (status != 0) |
| return; |
| } |
| } |
| |
| /* FIXME: this function does not work */ |
| static int set_higher_rates(struct moschip_port *mos7720_port, |
| unsigned int baud) |
| { |
| struct usb_serial_port *port; |
| struct usb_serial *serial; |
| int port_number; |
| enum mos_regs sp_reg; |
| if (mos7720_port == NULL) |
| return -EINVAL; |
| |
| port = mos7720_port->port; |
| serial = port->serial; |
| |
| /*********************************************** |
| * Init Sequence for higher rates |
| ***********************************************/ |
| dbg("Sending Setting Commands .........."); |
| port_number = port->number - port->serial->minor; |
| |
| write_mos_reg(serial, port_number, IER, 0x00); |
| write_mos_reg(serial, port_number, FCR, 0x00); |
| write_mos_reg(serial, port_number, FCR, 0xcf); |
| mos7720_port->shadowMCR = 0x0b; |
| write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
| write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00); |
| |
| /*********************************************** |
| * Set for higher rates * |
| ***********************************************/ |
| /* writing baud rate verbatum into uart clock field clearly not right */ |
| if (port_number == 0) |
| sp_reg = SP1_REG; |
| else |
| sp_reg = SP2_REG; |
| write_mos_reg(serial, dummy, sp_reg, baud * 0x10); |
| write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03); |
| mos7720_port->shadowMCR = 0x2b; |
| write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
| |
| /*********************************************** |
| * Set DLL/DLM |
| ***********************************************/ |
| mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
| write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
| write_mos_reg(serial, port_number, DLL, 0x01); |
| write_mos_reg(serial, port_number, DLM, 0x00); |
| mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
| write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
| |
| return 0; |
| } |
| |
| /* baud rate information */ |
| struct divisor_table_entry { |
| __u32 baudrate; |
| __u16 divisor; |
| }; |
| |
| /* Define table of divisors for moschip 7720 hardware * |
| * These assume a 3.6864MHz crystal, the standard /16, and * |
| * MCR.7 = 0. */ |
| static struct divisor_table_entry divisor_table[] = { |
| { 50, 2304}, |
| { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ |
| { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ |
| { 150, 768}, |
| { 300, 384}, |
| { 600, 192}, |
| { 1200, 96}, |
| { 1800, 64}, |
| { 2400, 48}, |
| { 4800, 24}, |
| { 7200, 16}, |
| { 9600, 12}, |
| { 19200, 6}, |
| { 38400, 3}, |
| { 57600, 2}, |
| { 115200, 1}, |
| }; |
| |
| /***************************************************************************** |
| * calc_baud_rate_divisor |
| * this function calculates the proper baud rate divisor for the specified |
| * baud rate. |
| *****************************************************************************/ |
| static int calc_baud_rate_divisor(int baudrate, int *divisor) |
| { |
| int i; |
| __u16 custom; |
| __u16 round1; |
| __u16 round; |
| |
| |
| dbg("%s - %d", __func__, baudrate); |
| |
| for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { |
| if (divisor_table[i].baudrate == baudrate) { |
| *divisor = divisor_table[i].divisor; |
| return 0; |
| } |
| } |
| |
| /* After trying for all the standard baud rates * |
| * Try calculating the divisor for this baud rate */ |
| if (baudrate > 75 && baudrate < 230400) { |
| /* get the divisor */ |
| custom = (__u16)(230400L / baudrate); |
| |
| /* Check for round off */ |
| round1 = (__u16)(2304000L / baudrate); |
| round = (__u16)(round1 - (custom * 10)); |
| if (round > 4) |
| custom++; |
| *divisor = custom; |
| |
| dbg("Baud %d = %d", baudrate, custom); |
| return 0; |
| } |
| |
| dbg("Baud calculation Failed..."); |
| return -EINVAL; |
| } |
| |
| /* |
| * send_cmd_write_baud_rate |
| * this function sends the proper command to change the baud rate of the |
| * specified port. |
| */ |
| static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, |
| int baudrate) |
| { |
| struct usb_serial_port *port; |
| struct usb_serial *serial; |
| int divisor; |
| int status; |
| unsigned char number; |
| |
| if (mos7720_port == NULL) |
| return -1; |
| |
| port = mos7720_port->port; |
| serial = port->serial; |
| |
| dbg("%s: Entering ..........", __func__); |
| |
| number = port->number - port->serial->minor; |
| dbg("%s - port = %d, baud = %d", __func__, port->number, baudrate); |
| |
| /* Calculate the Divisor */ |
| status = calc_baud_rate_divisor(baudrate, &divisor); |
| if (status) { |
| dev_err(&port->dev, "%s - bad baud rate\n", __func__); |
| return status; |
| } |
| |
| /* Enable access to divisor latch */ |
| mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; |
| write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); |
| |
| /* Write the divisor */ |
| write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff)); |
| write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8)); |
| |
| /* Disable access to divisor latch */ |
| mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; |
| write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR); |
| |
| return status; |
| } |
| |
| /* |
| * change_port_settings |
| * This routine is called to set the UART on the device to match |
| * the specified new settings. |
| */ |
| static void change_port_settings(struct tty_struct *tty, |
| struct moschip_port *mos7720_port, |
| struct ktermios *old_termios) |
| { |
| struct usb_serial_port *port; |
| struct usb_serial *serial; |
| int baud; |
| unsigned cflag; |
| unsigned iflag; |
| __u8 mask = 0xff; |
| __u8 lData; |
| __u8 lParity; |
| __u8 lStop; |
| int status; |
| int port_number; |
| |
| if (mos7720_port == NULL) |
| return ; |
| |
| port = mos7720_port->port; |
| serial = port->serial; |
| port_number = port->number - port->serial->minor; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (!mos7720_port->open) { |
| dbg("%s - port not opened", __func__); |
| return; |
| } |
| |
| dbg("%s: Entering ..........", __func__); |
| |
| lData = UART_LCR_WLEN8; |
| lStop = 0x00; /* 1 stop bit */ |
| lParity = 0x00; /* No parity */ |
| |
| cflag = tty->termios->c_cflag; |
| iflag = tty->termios->c_iflag; |
| |
| /* Change the number of bits */ |
| switch (cflag & CSIZE) { |
| case CS5: |
| lData = UART_LCR_WLEN5; |
| mask = 0x1f; |
| break; |
| |
| case CS6: |
| lData = UART_LCR_WLEN6; |
| mask = 0x3f; |
| break; |
| |
| case CS7: |
| lData = UART_LCR_WLEN7; |
| mask = 0x7f; |
| break; |
| default: |
| case CS8: |
| lData = UART_LCR_WLEN8; |
| break; |
| } |
| |
| /* Change the Parity bit */ |
| if (cflag & PARENB) { |
| if (cflag & PARODD) { |
| lParity = UART_LCR_PARITY; |
| dbg("%s - parity = odd", __func__); |
| } else { |
| lParity = (UART_LCR_EPAR | UART_LCR_PARITY); |
| dbg("%s - parity = even", __func__); |
| } |
| |
| } else { |
| dbg("%s - parity = none", __func__); |
| } |
| |
| if (cflag & CMSPAR) |
| lParity = lParity | 0x20; |
| |
| /* Change the Stop bit */ |
| if (cflag & CSTOPB) { |
| lStop = UART_LCR_STOP; |
| dbg("%s - stop bits = 2", __func__); |
| } else { |
| lStop = 0x00; |
| dbg("%s - stop bits = 1", __func__); |
| } |
| |
| #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ |
| #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ |
| #define LCR_PAR_MASK 0x38 /* Mask for parity field */ |
| |
| /* Update the LCR with the correct value */ |
| mos7720_port->shadowLCR &= |
| ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
| mos7720_port->shadowLCR |= (lData | lParity | lStop); |
| |
| |
| /* Disable Interrupts */ |
| write_mos_reg(serial, port_number, IER, 0x00); |
| write_mos_reg(serial, port_number, FCR, 0x00); |
| write_mos_reg(serial, port_number, FCR, 0xcf); |
| |
| /* Send the updated LCR value to the mos7720 */ |
| write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR); |
| mos7720_port->shadowMCR = 0x0b; |
| write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
| |
| /* set up the MCR register and send it to the mos7720 */ |
| mos7720_port->shadowMCR = UART_MCR_OUT2; |
| if (cflag & CBAUD) |
| mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); |
| |
| if (cflag & CRTSCTS) { |
| mos7720_port->shadowMCR |= (UART_MCR_XONANY); |
| /* To set hardware flow control to the specified * |
| * serial port, in SP1/2_CONTROL_REG */ |
| if (port_number) |
| write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01); |
| else |
| write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02); |
| |
| } else |
| mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); |
| |
| write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR); |
| |
| /* Determine divisor based on baud rate */ |
| baud = tty_get_baud_rate(tty); |
| if (!baud) { |
| /* pick a default, any default... */ |
| dbg("Picked default baud..."); |
| baud = 9600; |
| } |
| |
| if (baud >= 230400) { |
| set_higher_rates(mos7720_port, baud); |
| /* Enable Interrupts */ |
| write_mos_reg(serial, port_number, IER, 0x0c); |
| return; |
| } |
| |
| dbg("%s - baud rate = %d", __func__, baud); |
| status = send_cmd_write_baud_rate(mos7720_port, baud); |
| /* FIXME: needs to write actual resulting baud back not just |
| blindly do so */ |
| if (cflag & CBAUD) |
| tty_encode_baud_rate(tty, baud, baud); |
| /* Enable Interrupts */ |
| write_mos_reg(serial, port_number, IER, 0x0c); |
| |
| if (port->read_urb->status != -EINPROGRESS) { |
| status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| if (status) |
| dbg("usb_submit_urb(read bulk) failed, status = %d", |
| status); |
| } |
| } |
| |
| /* |
| * mos7720_set_termios |
| * this function is called by the tty driver when it wants to change the |
| * termios structure. |
| */ |
| static void mos7720_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| int status; |
| unsigned int cflag; |
| struct usb_serial *serial; |
| struct moschip_port *mos7720_port; |
| |
| serial = port->serial; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| |
| if (mos7720_port == NULL) |
| return; |
| |
| if (!mos7720_port->open) { |
| dbg("%s - port not opened", __func__); |
| return; |
| } |
| |
| dbg("%s\n", "setting termios - ASPIRE"); |
| |
| cflag = tty->termios->c_cflag; |
| |
| dbg("%s - cflag %08x iflag %08x", __func__, |
| tty->termios->c_cflag, |
| RELEVANT_IFLAG(tty->termios->c_iflag)); |
| |
| dbg("%s - old cflag %08x old iflag %08x", __func__, |
| old_termios->c_cflag, |
| RELEVANT_IFLAG(old_termios->c_iflag)); |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| /* change the port settings to the new ones specified */ |
| change_port_settings(tty, mos7720_port, old_termios); |
| |
| if (port->read_urb->status != -EINPROGRESS) { |
| status = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| if (status) |
| dbg("usb_submit_urb(read bulk) failed, status = %d", |
| status); |
| } |
| } |
| |
| /* |
| * get_lsr_info - get line status register info |
| * |
| * Purpose: Let user call ioctl() to get info when the UART physically |
| * is emptied. On bus types like RS485, the transmitter must |
| * release the bus after transmitting. This must be done when |
| * the transmit shift register is empty, not be done when the |
| * transmit holding register is empty. This functionality |
| * allows an RS485 driver to be written in user space. |
| */ |
| static int get_lsr_info(struct tty_struct *tty, |
| struct moschip_port *mos7720_port, unsigned int __user *value) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| unsigned int result = 0; |
| unsigned char data = 0; |
| int port_number = port->number - port->serial->minor; |
| int count; |
| |
| count = mos7720_chars_in_buffer(tty); |
| if (count == 0) { |
| read_mos_reg(port->serial, port_number, LSR, &data); |
| if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) |
| == (UART_LSR_TEMT | UART_LSR_THRE)) { |
| dbg("%s -- Empty", __func__); |
| result = TIOCSER_TEMT; |
| } |
| } |
| if (copy_to_user(value, &result, sizeof(int))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int mos7720_tiocmget(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
| unsigned int result = 0; |
| unsigned int mcr ; |
| unsigned int msr ; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| mcr = mos7720_port->shadowMCR; |
| msr = mos7720_port->shadowMSR; |
| |
| result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ |
| | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ |
| | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ |
| | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ |
| | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ |
| | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ |
| |
| dbg("%s -- %x", __func__, result); |
| |
| return result; |
| } |
| |
| static int mos7720_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port = usb_get_serial_port_data(port); |
| unsigned int mcr ; |
| dbg("%s - port %d", __func__, port->number); |
| dbg("he was at tiocmset"); |
| |
| mcr = mos7720_port->shadowMCR; |
| |
| if (set & TIOCM_RTS) |
| mcr |= UART_MCR_RTS; |
| if (set & TIOCM_DTR) |
| mcr |= UART_MCR_DTR; |
| if (set & TIOCM_LOOP) |
| mcr |= UART_MCR_LOOP; |
| |
| if (clear & TIOCM_RTS) |
| mcr &= ~UART_MCR_RTS; |
| if (clear & TIOCM_DTR) |
| mcr &= ~UART_MCR_DTR; |
| if (clear & TIOCM_LOOP) |
| mcr &= ~UART_MCR_LOOP; |
| |
| mos7720_port->shadowMCR = mcr; |
| write_mos_reg(port->serial, port->number - port->serial->minor, |
| MCR, mos7720_port->shadowMCR); |
| |
| return 0; |
| } |
| |
| static int mos7720_get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port; |
| struct async_icount cnow; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| cnow = mos7720_port->icount; |
| |
| icount->cts = cnow.cts; |
| icount->dsr = cnow.dsr; |
| icount->rng = cnow.rng; |
| icount->dcd = cnow.dcd; |
| icount->rx = cnow.rx; |
| icount->tx = cnow.tx; |
| icount->frame = cnow.frame; |
| icount->overrun = cnow.overrun; |
| icount->parity = cnow.parity; |
| icount->brk = cnow.brk; |
| icount->buf_overrun = cnow.buf_overrun; |
| |
| dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, |
| port->number, icount->rx, icount->tx); |
| return 0; |
| } |
| |
| static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, |
| unsigned int __user *value) |
| { |
| unsigned int mcr; |
| unsigned int arg; |
| |
| struct usb_serial_port *port; |
| |
| if (mos7720_port == NULL) |
| return -1; |
| |
| port = (struct usb_serial_port *)mos7720_port->port; |
| mcr = mos7720_port->shadowMCR; |
| |
| if (copy_from_user(&arg, value, sizeof(int))) |
| return -EFAULT; |
| |
| switch (cmd) { |
| case TIOCMBIS: |
| if (arg & TIOCM_RTS) |
| mcr |= UART_MCR_RTS; |
| if (arg & TIOCM_DTR) |
| mcr |= UART_MCR_RTS; |
| if (arg & TIOCM_LOOP) |
| mcr |= UART_MCR_LOOP; |
| break; |
| |
| case TIOCMBIC: |
| if (arg & TIOCM_RTS) |
| mcr &= ~UART_MCR_RTS; |
| if (arg & TIOCM_DTR) |
| mcr &= ~UART_MCR_RTS; |
| if (arg & TIOCM_LOOP) |
| mcr &= ~UART_MCR_LOOP; |
| break; |
| |
| } |
| |
| mos7720_port->shadowMCR = mcr; |
| write_mos_reg(port->serial, port->number - port->serial->minor, |
| MCR, mos7720_port->shadowMCR); |
| |
| return 0; |
| } |
| |
| static int get_serial_info(struct moschip_port *mos7720_port, |
| struct serial_struct __user *retinfo) |
| { |
| struct serial_struct tmp; |
| |
| if (!retinfo) |
| return -EFAULT; |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| tmp.type = PORT_16550A; |
| tmp.line = mos7720_port->port->serial->minor; |
| tmp.port = mos7720_port->port->number; |
| tmp.irq = 0; |
| tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
| tmp.baud_base = 9600; |
| tmp.close_delay = 5*HZ; |
| tmp.closing_wait = 30*HZ; |
| |
| if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int mos7720_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7720_port; |
| struct async_icount cnow; |
| struct async_icount cprev; |
| |
| mos7720_port = usb_get_serial_port_data(port); |
| if (mos7720_port == NULL) |
| return -ENODEV; |
| |
| dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
| |
| switch (cmd) { |
| case TIOCSERGETLSR: |
| dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
| return get_lsr_info(tty, mos7720_port, |
| (unsigned int __user *)arg); |
| |
| /* FIXME: These should be using the mode methods */ |
| case TIOCMBIS: |
| case TIOCMBIC: |
| dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", |
| __func__, port->number); |
| return set_modem_info(mos7720_port, cmd, |
| (unsigned int __user *)arg); |
| |
| case TIOCGSERIAL: |
| dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
| return get_serial_info(mos7720_port, |
| (struct serial_struct __user *)arg); |
| |
| case TIOCMIWAIT: |
| dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
| cprev = mos7720_port->icount; |
| while (1) { |
| if (signal_pending(current)) |
| return -ERESTARTSYS; |
| cnow = mos7720_port->icount; |
| if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) |
| return -EIO; /* no change => error */ |
| if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || |
| ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || |
| ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || |
| ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { |
| return 0; |
| } |
| cprev = cnow; |
| } |
| /* NOTREACHED */ |
| break; |
| } |
| |
| return -ENOIOCTLCMD; |
| } |
| |
| static int mos7720_startup(struct usb_serial *serial) |
| { |
| struct moschip_port *mos7720_port; |
| struct usb_device *dev; |
| int i; |
| char data; |
| u16 product; |
| int ret_val; |
| |
| dbg("%s: Entering ..........", __func__); |
| |
| if (!serial) { |
| dbg("Invalid Handler"); |
| return -ENODEV; |
| } |
| |
| product = le16_to_cpu(serial->dev->descriptor.idProduct); |
| dev = serial->dev; |
| |
| /* |
| * 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 |
| * assumes both pairs are serial ports, we must engage in a bit of |
| * subterfuge and swap the pointers for ports 0 and 1 in order to make |
| * port 0 point to the serial port. However, both moschip devices use a |
| * single interrupt-in endpoint for both ports (as mentioned a little |
| * further down), and this endpoint was assigned to port 0. So after |
| * the swap, we must copy the interrupt endpoint elements from port 1 |
| * (as newly assigned) to port 0, and null out port 1 pointers. |
| */ |
| if (product == MOSCHIP_DEVICE_ID_7715) { |
| struct usb_serial_port *tmp = serial->port[0]; |
| serial->port[0] = serial->port[1]; |
| serial->port[1] = tmp; |
| serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb; |
| serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer; |
| serial->port[0]->interrupt_in_endpointAddress = |
| tmp->interrupt_in_endpointAddress; |
| serial->port[1]->interrupt_in_urb = NULL; |
| serial->port[1]->interrupt_in_buffer = NULL; |
| } |
| |
| |
| /* 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__); |
| return -ENOMEM; |
| } |
| |
| /* Initialize all port interrupt end point to port 0 int |
| * endpoint. Our device has only one interrupt endpoint |
| * common to all ports */ |
| serial->port[i]->interrupt_in_endpointAddress = |
| serial->port[0]->interrupt_in_endpointAddress; |
| |
| mos7720_port->port = serial->port[i]; |
| usb_set_serial_port_data(serial->port[i], mos7720_port); |
| |
| dbg("port number is %d", serial->port[i]->number); |
| dbg("serial number is %d", serial->minor); |
| } |
| |
| |
| /* setting configuration feature to one */ |
| usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); |
| |
| /* 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 */ |
| read_mos_reg(serial, 0, LSR, &data); |
| dbg("LSR:%x", data); |
| |
| return 0; |
| } |
| |
| 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, |
| msecs_to_jiffies(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])); |
| } |
| |
| static struct usb_driver usb_driver = { |
| .name = "moschip7720", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = moschip_port_id_table, |
| }; |
| |
| static struct usb_serial_driver moschip7720_2port_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "moschip7720", |
| }, |
| .description = "Moschip 2 port adapter", |
| .id_table = moschip_port_id_table, |
| .calc_num_ports = mos77xx_calc_num_ports, |
| .open = mos7720_open, |
| .close = mos7720_close, |
| .throttle = mos7720_throttle, |
| .unthrottle = mos7720_unthrottle, |
| .probe = mos77xx_probe, |
| .attach = mos7720_startup, |
| .release = mos7720_release, |
| .ioctl = mos7720_ioctl, |
| .tiocmget = mos7720_tiocmget, |
| .tiocmset = mos7720_tiocmset, |
| .get_icount = mos7720_get_icount, |
| .set_termios = mos7720_set_termios, |
| .write = mos7720_write, |
| .write_room = mos7720_write_room, |
| .chars_in_buffer = mos7720_chars_in_buffer, |
| .break_ctl = mos7720_break, |
| .read_bulk_callback = mos7720_bulk_in_callback, |
| .read_int_callback = NULL /* dynamically assigned in probe() */ |
| }; |
| |
| static struct usb_serial_driver * const serial_drivers[] = { |
| &moschip7720_2port_driver, NULL |
| }; |
| |
| module_usb_serial_driver(usb_driver, serial_drivers); |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |