e6bee325e4
* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (76 commits) pch_uart: reference clock on CM-iTC pch_phub: add new device ML7213 n_gsm: fix UIH control byte : P bit should be 0 n_gsm: add a documentation serial: msm_serial_hs: Add MSM high speed UART driver tty_audit: fix tty_audit_add_data live lock on audit disabled tty: move cd1865.h to drivers/staging/tty/ Staging: tty: fix build with epca.c driver pcmcia: synclink_cs: fix prototype for mgslpc_ioctl() Staging: generic_serial: fix double locking bug nozomi: don't use flush_scheduled_work() tty/serial: Relax the device_type restriction from of_serial MAINTAINERS: Update HVC file patterns tty: phase out of ioctl file pointer for tty3270 as well tty: forgot to remove ipwireless from drivers/char/pcmcia/Makefile pch_uart: Fix DMA channel miss-setting issue. pch_uart: fix exclusive access issue pch_uart: fix auto flow control miss-setting issue pch_uart: fix uart clock setting issue pch_uart : Use dev_xxx not pr_xxx ... Fix up trivial conflicts in drivers/misc/pch_phub.c (same patch applied twice, then changes to the same area in one branch)
2267 lines
61 KiB
C
2267 lines
61 KiB
C
/*
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* mos7720.c
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* Controls the Moschip 7720 usb to dual port serial convertor
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*
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* Copyright 2006 Moschip Semiconductor Tech. Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* Developed by:
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* Vijaya Kumar <vijaykumar.gn@gmail.com>
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* Ajay Kumar <naanuajay@yahoo.com>
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* Gurudeva <ngurudeva@yahoo.com>
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*
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* Cleaned up from the original by:
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* Greg Kroah-Hartman <gregkh@suse.de>
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*
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* Originally based on drivers/usb/serial/io_edgeport.c which is:
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* Copyright (C) 2000 Inside Out Networks, All rights reserved.
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* Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/uaccess.h>
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#include <linux/parport.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "2.1"
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#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
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#define DRIVER_DESC "Moschip USB Serial Driver"
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/* default urb timeout */
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#define MOS_WDR_TIMEOUT (HZ * 5)
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#define MOS_MAX_PORT 0x02
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#define MOS_WRITE 0x0E
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#define MOS_READ 0x0D
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/* Interrupt Rotinue Defines */
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#define SERIAL_IIR_RLS 0x06
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#define SERIAL_IIR_RDA 0x04
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#define SERIAL_IIR_CTI 0x0c
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#define SERIAL_IIR_THR 0x02
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#define SERIAL_IIR_MS 0x00
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#define NUM_URBS 16 /* URB Count */
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#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
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/* This structure holds all of the local serial port information */
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struct moschip_port {
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__u8 shadowLCR; /* last LCR value received */
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__u8 shadowMCR; /* last MCR value received */
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__u8 shadowMSR; /* last MSR value received */
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char open;
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struct async_icount icount;
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struct usb_serial_port *port; /* loop back to the owner */
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struct urb *write_urb_pool[NUM_URBS];
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};
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static int debug;
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static struct usb_serial_driver moschip7720_2port_driver;
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#define USB_VENDOR_ID_MOSCHIP 0x9710
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#define MOSCHIP_DEVICE_ID_7720 0x7720
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#define MOSCHIP_DEVICE_ID_7715 0x7715
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static const struct usb_device_id moschip_port_id_table[] = {
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{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) },
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{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) },
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{ } /* terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, moschip_port_id_table);
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#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
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/* initial values for parport regs */
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#define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */
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#define ECR_INIT_VAL 0x00 /* SPP mode */
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struct urbtracker {
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struct mos7715_parport *mos_parport;
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struct list_head urblist_entry;
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struct kref ref_count;
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struct urb *urb;
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};
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enum mos7715_pp_modes {
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SPP = 0<<5,
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PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */
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PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */
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};
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struct mos7715_parport {
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struct parport *pp; /* back to containing struct */
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struct kref ref_count; /* to instance of this struct */
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struct list_head deferred_urbs; /* list deferred async urbs */
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struct list_head active_urbs; /* list async urbs in flight */
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spinlock_t listlock; /* protects list access */
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bool msg_pending; /* usb sync call pending */
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struct completion syncmsg_compl; /* usb sync call completed */
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struct tasklet_struct urb_tasklet; /* for sending deferred urbs */
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struct usb_serial *serial; /* back to containing struct */
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__u8 shadowECR; /* parallel port regs... */
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__u8 shadowDCR;
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atomic_t shadowDSR; /* updated in int-in callback */
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};
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/* lock guards against dereferencing NULL ptr in parport ops callbacks */
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static DEFINE_SPINLOCK(release_lock);
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#endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
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static const unsigned int dummy; /* for clarity in register access fns */
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enum mos_regs {
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THR, /* serial port regs */
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RHR,
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IER,
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FCR,
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ISR,
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LCR,
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MCR,
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LSR,
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MSR,
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SPR,
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DLL,
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DLM,
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DPR, /* parallel port regs */
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DSR,
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DCR,
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ECR,
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SP1_REG, /* device control regs */
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SP2_REG, /* serial port 2 (7720 only) */
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PP_REG,
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SP_CONTROL_REG,
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};
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/*
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* Return the correct value for the Windex field of the setup packet
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* for a control endpoint message. See the 7715 datasheet.
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*/
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static inline __u16 get_reg_index(enum mos_regs reg)
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{
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static const __u16 mos7715_index_lookup_table[] = {
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0x00, /* THR */
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0x00, /* RHR */
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0x01, /* IER */
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0x02, /* FCR */
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0x02, /* ISR */
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0x03, /* LCR */
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0x04, /* MCR */
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0x05, /* LSR */
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0x06, /* MSR */
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0x07, /* SPR */
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0x00, /* DLL */
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0x01, /* DLM */
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0x00, /* DPR */
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0x01, /* DSR */
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0x02, /* DCR */
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0x0a, /* ECR */
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0x01, /* SP1_REG */
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0x02, /* SP2_REG (7720 only) */
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0x04, /* PP_REG (7715 only) */
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0x08, /* SP_CONTROL_REG */
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};
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return mos7715_index_lookup_table[reg];
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}
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/*
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* Return the correct value for the upper byte of the Wvalue field of
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* the setup packet for a control endpoint message.
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*/
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static inline __u16 get_reg_value(enum mos_regs reg,
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unsigned int serial_portnum)
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{
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if (reg >= SP1_REG) /* control reg */
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return 0x0000;
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else if (reg >= DPR) /* parallel port reg (7715 only) */
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return 0x0100;
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else /* serial port reg */
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return (serial_portnum + 2) << 8;
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}
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/*
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* Write data byte to the specified device register. The data is embedded in
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* the value field of the setup packet. serial_portnum is ignored for registers
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* not specific to a particular serial port.
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*/
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static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
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enum mos_regs reg, __u8 data)
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{
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struct usb_device *usbdev = serial->dev;
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unsigned int pipe = usb_sndctrlpipe(usbdev, 0);
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__u8 request = (__u8)0x0e;
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__u8 requesttype = (__u8)0x40;
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__u16 index = get_reg_index(reg);
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__u16 value = get_reg_value(reg, serial_portnum) + data;
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int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
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index, NULL, 0, MOS_WDR_TIMEOUT);
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if (status < 0)
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dev_err(&usbdev->dev,
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"mos7720: usb_control_msg() failed: %d", status);
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return status;
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}
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/*
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* Read data byte from the specified device register. The data returned by the
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* device is embedded in the value field of the setup packet. serial_portnum is
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* ignored for registers that are not specific to a particular serial port.
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*/
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static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
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enum mos_regs reg, __u8 *data)
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{
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struct usb_device *usbdev = serial->dev;
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unsigned int pipe = usb_rcvctrlpipe(usbdev, 0);
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__u8 request = (__u8)0x0d;
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__u8 requesttype = (__u8)0xc0;
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__u16 index = get_reg_index(reg);
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__u16 value = get_reg_value(reg, serial_portnum);
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int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
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index, data, 1, MOS_WDR_TIMEOUT);
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if (status < 0)
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dev_err(&usbdev->dev,
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"mos7720: usb_control_msg() failed: %d", status);
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return status;
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}
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#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
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static inline int mos7715_change_mode(struct mos7715_parport *mos_parport,
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enum mos7715_pp_modes mode)
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{
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mos_parport->shadowECR = mode;
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write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR);
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return 0;
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}
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static void destroy_mos_parport(struct kref *kref)
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{
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struct mos7715_parport *mos_parport =
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container_of(kref, struct mos7715_parport, ref_count);
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dbg("%s called", __func__);
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kfree(mos_parport);
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}
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static void destroy_urbtracker(struct kref *kref)
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{
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struct urbtracker *urbtrack =
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container_of(kref, struct urbtracker, ref_count);
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struct mos7715_parport *mos_parport = urbtrack->mos_parport;
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dbg("%s called", __func__);
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usb_free_urb(urbtrack->urb);
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kfree(urbtrack);
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kref_put(&mos_parport->ref_count, destroy_mos_parport);
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}
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/*
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* This runs as a tasklet when sending an urb in a non-blocking parallel
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* port callback had to be deferred because the disconnect mutex could not be
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* obtained at the time.
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*/
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static void send_deferred_urbs(unsigned long _mos_parport)
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{
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int ret_val;
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unsigned long flags;
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struct mos7715_parport *mos_parport = (void *)_mos_parport;
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struct urbtracker *urbtrack;
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struct list_head *cursor, *next;
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dbg("%s called", __func__);
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/* if release function ran, game over */
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if (unlikely(mos_parport->serial == NULL))
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return;
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/* try again to get the mutex */
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if (!mutex_trylock(&mos_parport->serial->disc_mutex)) {
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dbg("%s: rescheduling tasklet", __func__);
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tasklet_schedule(&mos_parport->urb_tasklet);
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return;
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}
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/* if device disconnected, game over */
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if (unlikely(mos_parport->serial->disconnected)) {
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mutex_unlock(&mos_parport->serial->disc_mutex);
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return;
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}
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spin_lock_irqsave(&mos_parport->listlock, flags);
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if (list_empty(&mos_parport->deferred_urbs)) {
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spin_unlock_irqrestore(&mos_parport->listlock, flags);
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mutex_unlock(&mos_parport->serial->disc_mutex);
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dbg("%s: deferred_urbs list empty", __func__);
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return;
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}
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/* move contents of deferred_urbs list to active_urbs list and submit */
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list_for_each_safe(cursor, next, &mos_parport->deferred_urbs)
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list_move_tail(cursor, &mos_parport->active_urbs);
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list_for_each_entry(urbtrack, &mos_parport->active_urbs,
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urblist_entry) {
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ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC);
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dbg("%s: urb submitted", __func__);
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if (ret_val) {
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dev_err(&mos_parport->serial->dev->dev,
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"usb_submit_urb() failed: %d", ret_val);
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list_del(&urbtrack->urblist_entry);
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kref_put(&urbtrack->ref_count, destroy_urbtracker);
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}
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}
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spin_unlock_irqrestore(&mos_parport->listlock, flags);
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mutex_unlock(&mos_parport->serial->disc_mutex);
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}
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/* callback for parallel port control urbs submitted asynchronously */
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static void async_complete(struct urb *urb)
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{
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struct urbtracker *urbtrack = urb->context;
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int status = urb->status;
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dbg("%s called", __func__);
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if (unlikely(status))
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dbg("%s - nonzero urb status received: %d", __func__, status);
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/* remove the urbtracker from the active_urbs list */
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spin_lock(&urbtrack->mos_parport->listlock);
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list_del(&urbtrack->urblist_entry);
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spin_unlock(&urbtrack->mos_parport->listlock);
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kref_put(&urbtrack->ref_count, destroy_urbtracker);
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}
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static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport,
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enum mos_regs reg, __u8 data)
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{
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struct urbtracker *urbtrack;
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int ret_val;
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unsigned long flags;
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struct usb_ctrlrequest setup;
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struct usb_serial *serial = mos_parport->serial;
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struct usb_device *usbdev = serial->dev;
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dbg("%s called", __func__);
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/* create and initialize the control urb and containing urbtracker */
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urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC);
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if (urbtrack == NULL) {
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dev_err(&usbdev->dev, "out of memory");
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return -ENOMEM;
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}
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kref_get(&mos_parport->ref_count);
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urbtrack->mos_parport = mos_parport;
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urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (urbtrack->urb == NULL) {
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dev_err(&usbdev->dev, "out of urbs");
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kfree(urbtrack);
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return -ENOMEM;
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}
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setup.bRequestType = (__u8)0x40;
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setup.bRequest = (__u8)0x0e;
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setup.wValue = get_reg_value(reg, dummy);
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setup.wIndex = get_reg_index(reg);
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setup.wLength = 0;
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usb_fill_control_urb(urbtrack->urb, usbdev,
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usb_sndctrlpipe(usbdev, 0),
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(unsigned char *)&setup,
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NULL, 0, async_complete, urbtrack);
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kref_init(&urbtrack->ref_count);
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INIT_LIST_HEAD(&urbtrack->urblist_entry);
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|
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/*
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* get the disconnect mutex, or add tracker to the deferred_urbs list
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* and schedule a tasklet to try again later
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*/
|
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if (!mutex_trylock(&serial->disc_mutex)) {
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spin_lock_irqsave(&mos_parport->listlock, flags);
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list_add_tail(&urbtrack->urblist_entry,
|
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&mos_parport->deferred_urbs);
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spin_unlock_irqrestore(&mos_parport->listlock, flags);
|
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tasklet_schedule(&mos_parport->urb_tasklet);
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dbg("tasklet scheduled");
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return 0;
|
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}
|
|
|
|
/* bail if device disconnected */
|
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if (serial->disconnected) {
|
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kref_put(&urbtrack->ref_count, destroy_urbtracker);
|
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mutex_unlock(&serial->disc_mutex);
|
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return -ENODEV;
|
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}
|
|
|
|
/* add the tracker to the active_urbs list and submit */
|
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spin_lock_irqsave(&mos_parport->listlock, flags);
|
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list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs);
|
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spin_unlock_irqrestore(&mos_parport->listlock, flags);
|
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ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC);
|
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mutex_unlock(&serial->disc_mutex);
|
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if (ret_val) {
|
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dev_err(&usbdev->dev,
|
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"%s: submit_urb() failed: %d", __func__, ret_val);
|
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spin_lock_irqsave(&mos_parport->listlock, flags);
|
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list_del(&urbtrack->urblist_entry);
|
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spin_unlock_irqrestore(&mos_parport->listlock, flags);
|
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kref_put(&urbtrack->ref_count, destroy_urbtracker);
|
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return ret_val;
|
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}
|
|
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);
|
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return -1;
|
|
}
|
|
mos_parport->msg_pending = true; /* synch usb call pending */
|
|
INIT_COMPLETION(mos_parport->syncmsg_compl);
|
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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) {
|
|
dbg("URB KILLED !!!");
|
|
return;
|
|
}
|
|
|
|
if (port->read_urb->status != -EINPROGRESS) {
|
|
port->read_urb->dev = port->serial->dev;
|
|
|
|
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 usb_serial_port *port0;
|
|
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;
|
|
|
|
port0 = serial->port[0];
|
|
|
|
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(&port->dev, "%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(&port->dev, "%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) {
|
|
port->read_urb->dev = serial->dev;
|
|
|
|
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) {
|
|
dbg("%s", "URB KILLED !!!!!");
|
|
return;
|
|
}
|
|
|
|
if (port->read_urb->status != -EINPROGRESS) {
|
|
port->read_urb->dev = serial->dev;
|
|
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);
|
|
return 0;
|
|
|
|
/* 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, 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 */
|
|
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,
|
|
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,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
static struct usb_serial_driver moschip7720_2port_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "moschip7720",
|
|
},
|
|
.description = "Moschip 2 port adapter",
|
|
.usb_driver = &usb_driver,
|
|
.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 int __init moschip7720_init(void)
|
|
{
|
|
int retval;
|
|
|
|
dbg("%s: Entering ..........", __func__);
|
|
|
|
/* Register with the usb serial */
|
|
retval = usb_serial_register(&moschip7720_2port_driver);
|
|
if (retval)
|
|
goto failed_port_device_register;
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
|
|
/* Register with the usb */
|
|
retval = usb_register(&usb_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
|
|
return 0;
|
|
|
|
failed_usb_register:
|
|
usb_serial_deregister(&moschip7720_2port_driver);
|
|
|
|
failed_port_device_register:
|
|
return retval;
|
|
}
|
|
|
|
static void __exit moschip7720_exit(void)
|
|
{
|
|
usb_deregister(&usb_driver);
|
|
usb_serial_deregister(&moschip7720_2port_driver);
|
|
}
|
|
|
|
module_init(moschip7720_init);
|
|
module_exit(moschip7720_exit);
|
|
|
|
/* Module information */
|
|
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");
|