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authorGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 23:10:18 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 23:10:18 +0300
commitab4382d27412e7e3e7c936e8d50d8888dfac3df8 (patch)
tree51d96dea2431140358784b6b426715f37f74fd53 /drivers/serial/jsm
parent728674a7e466628df2aeec6d11a2ae1ef968fb67 (diff)
downloadlinux-ab4382d27412e7e3e7c936e8d50d8888dfac3df8.tar.xz
tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl> Cc: Michael H. Warfield <mhw@wittsend.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/jsm')
-rw-r--r--drivers/serial/jsm/Makefile8
-rw-r--r--drivers/serial/jsm/jsm.h388
-rw-r--r--drivers/serial/jsm/jsm_driver.c297
-rw-r--r--drivers/serial/jsm/jsm_neo.c1412
-rw-r--r--drivers/serial/jsm/jsm_tty.c910
5 files changed, 0 insertions, 3015 deletions
diff --git a/drivers/serial/jsm/Makefile b/drivers/serial/jsm/Makefile
deleted file mode 100644
index e46b6e0f8b18..000000000000
--- a/drivers/serial/jsm/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-#
-# Makefile for Jasmine adapter
-#
-
-obj-$(CONFIG_SERIAL_JSM) += jsm.o
-
-jsm-objs := jsm_driver.o jsm_neo.o jsm_tty.o
-
diff --git a/drivers/serial/jsm/jsm.h b/drivers/serial/jsm/jsm.h
deleted file mode 100644
index 38a509c684cd..000000000000
--- a/drivers/serial/jsm/jsm.h
+++ /dev/null
@@ -1,388 +0,0 @@
-/************************************************************************
- * Copyright 2003 Digi International (www.digi.com)
- *
- * Copyright (C) 2004 IBM Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * Contact Information:
- * Scott H Kilau <Scott_Kilau@digi.com>
- * Wendy Xiong <wendyx@us.ibm.com>
- *
- ***********************************************************************/
-
-#ifndef __JSM_DRIVER_H
-#define __JSM_DRIVER_H
-
-#include <linux/kernel.h>
-#include <linux/types.h> /* To pick up the varions Linux types */
-#include <linux/tty.h>
-#include <linux/serial_core.h>
-#include <linux/device.h>
-
-/*
- * Debugging levels can be set using debug insmod variable
- * They can also be compiled out completely.
- */
-enum {
- DBG_INIT = 0x01,
- DBG_BASIC = 0x02,
- DBG_CORE = 0x04,
- DBG_OPEN = 0x08,
- DBG_CLOSE = 0x10,
- DBG_READ = 0x20,
- DBG_WRITE = 0x40,
- DBG_IOCTL = 0x80,
- DBG_PROC = 0x100,
- DBG_PARAM = 0x200,
- DBG_PSCAN = 0x400,
- DBG_EVENT = 0x800,
- DBG_DRAIN = 0x1000,
- DBG_MSIGS = 0x2000,
- DBG_MGMT = 0x4000,
- DBG_INTR = 0x8000,
- DBG_CARR = 0x10000,
-};
-
-#define jsm_printk(nlevel, klevel, pdev, fmt, args...) \
- if ((DBG_##nlevel & jsm_debug)) \
- dev_printk(KERN_##klevel, pdev->dev, fmt, ## args)
-
-#define MAXLINES 256
-#define MAXPORTS 8
-#define MAX_STOPS_SENT 5
-
-/* Board type definitions */
-
-#define T_NEO 0000
-#define T_CLASSIC 0001
-#define T_PCIBUS 0400
-
-/* Board State Definitions */
-
-#define BD_RUNNING 0x0
-#define BD_REASON 0x7f
-#define BD_NOTFOUND 0x1
-#define BD_NOIOPORT 0x2
-#define BD_NOMEM 0x3
-#define BD_NOBIOS 0x4
-#define BD_NOFEP 0x5
-#define BD_FAILED 0x6
-#define BD_ALLOCATED 0x7
-#define BD_TRIBOOT 0x8
-#define BD_BADKME 0x80
-
-
-/* 4 extra for alignment play space */
-#define WRITEBUFLEN ((4096) + 4)
-#define MYFLIPLEN N_TTY_BUF_SIZE
-
-#define JSM_VERSION "jsm: 1.2-1-INKERNEL"
-#define JSM_PARTNUM "40002438_A-INKERNEL"
-
-struct jsm_board;
-struct jsm_channel;
-
-/************************************************************************
- * Per board operations structure *
- ************************************************************************/
-struct board_ops {
- irq_handler_t intr;
- void (*uart_init) (struct jsm_channel *ch);
- void (*uart_off) (struct jsm_channel *ch);
- void (*param) (struct jsm_channel *ch);
- void (*assert_modem_signals) (struct jsm_channel *ch);
- void (*flush_uart_write) (struct jsm_channel *ch);
- void (*flush_uart_read) (struct jsm_channel *ch);
- void (*disable_receiver) (struct jsm_channel *ch);
- void (*enable_receiver) (struct jsm_channel *ch);
- void (*send_break) (struct jsm_channel *ch);
- void (*clear_break) (struct jsm_channel *ch, int);
- void (*send_start_character) (struct jsm_channel *ch);
- void (*send_stop_character) (struct jsm_channel *ch);
- void (*copy_data_from_queue_to_uart) (struct jsm_channel *ch);
- u32 (*get_uart_bytes_left) (struct jsm_channel *ch);
- void (*send_immediate_char) (struct jsm_channel *ch, unsigned char);
-};
-
-
-/*
- * Per-board information
- */
-struct jsm_board
-{
- int boardnum; /* Board number: 0-32 */
-
- int type; /* Type of board */
- u8 rev; /* PCI revision ID */
- struct pci_dev *pci_dev;
- u32 maxports; /* MAX ports this board can handle */
-
- spinlock_t bd_intr_lock; /* Used to protect the poller tasklet and
- * the interrupt routine from each other.
- */
-
- u32 nasync; /* Number of ports on card */
-
- u32 irq; /* Interrupt request number */
-
- u64 membase; /* Start of base memory of the card */
- u64 membase_end; /* End of base memory of the card */
-
- u8 __iomem *re_map_membase;/* Remapped memory of the card */
-
- u64 iobase; /* Start of io base of the card */
- u64 iobase_end; /* End of io base of the card */
-
- u32 bd_uart_offset; /* Space between each UART */
-
- struct jsm_channel *channels[MAXPORTS]; /* array of pointers to our channels. */
- char *flipbuf; /* Our flip buffer, alloced if board is found */
-
- u32 bd_dividend; /* Board/UARTs specific dividend */
-
- struct board_ops *bd_ops;
-
- struct list_head jsm_board_entry;
-};
-
-/************************************************************************
- * Device flag definitions for ch_flags.
- ************************************************************************/
-#define CH_PRON 0x0001 /* Printer on string */
-#define CH_STOP 0x0002 /* Output is stopped */
-#define CH_STOPI 0x0004 /* Input is stopped */
-#define CH_CD 0x0008 /* Carrier is present */
-#define CH_FCAR 0x0010 /* Carrier forced on */
-#define CH_HANGUP 0x0020 /* Hangup received */
-
-#define CH_RECEIVER_OFF 0x0040 /* Receiver is off */
-#define CH_OPENING 0x0080 /* Port in fragile open state */
-#define CH_CLOSING 0x0100 /* Port in fragile close state */
-#define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */
-#define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */
-#define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */
-#define CH_BREAK_SENDING 0x1000 /* Break is being sent */
-#define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */
-#define CH_FLIPBUF_IN_USE 0x4000 /* Channel's flipbuf is in use */
-#define CH_BAUD0 0x08000 /* Used for checking B0 transitions */
-
-/* Our Read/Error/Write queue sizes */
-#define RQUEUEMASK 0x1FFF /* 8 K - 1 */
-#define EQUEUEMASK 0x1FFF /* 8 K - 1 */
-#define WQUEUEMASK 0x0FFF /* 4 K - 1 */
-#define RQUEUESIZE (RQUEUEMASK + 1)
-#define EQUEUESIZE RQUEUESIZE
-#define WQUEUESIZE (WQUEUEMASK + 1)
-
-
-/************************************************************************
- * Channel information structure.
- ************************************************************************/
-struct jsm_channel {
- struct uart_port uart_port;
- struct jsm_board *ch_bd; /* Board structure pointer */
-
- spinlock_t ch_lock; /* provide for serialization */
- wait_queue_head_t ch_flags_wait;
-
- u32 ch_portnum; /* Port number, 0 offset. */
- u32 ch_open_count; /* open count */
- u32 ch_flags; /* Channel flags */
-
- u64 ch_close_delay; /* How long we should drop RTS/DTR for */
-
- tcflag_t ch_c_iflag; /* channel iflags */
- tcflag_t ch_c_cflag; /* channel cflags */
- tcflag_t ch_c_oflag; /* channel oflags */
- tcflag_t ch_c_lflag; /* channel lflags */
- u8 ch_stopc; /* Stop character */
- u8 ch_startc; /* Start character */
-
- u8 ch_mostat; /* FEP output modem status */
- u8 ch_mistat; /* FEP input modem status */
-
- struct neo_uart_struct __iomem *ch_neo_uart; /* Pointer to the "mapped" UART struct */
- u8 ch_cached_lsr; /* Cached value of the LSR register */
-
- u8 *ch_rqueue; /* Our read queue buffer - malloc'ed */
- u16 ch_r_head; /* Head location of the read queue */
- u16 ch_r_tail; /* Tail location of the read queue */
-
- u8 *ch_equeue; /* Our error queue buffer - malloc'ed */
- u16 ch_e_head; /* Head location of the error queue */
- u16 ch_e_tail; /* Tail location of the error queue */
-
- u8 *ch_wqueue; /* Our write queue buffer - malloc'ed */
- u16 ch_w_head; /* Head location of the write queue */
- u16 ch_w_tail; /* Tail location of the write queue */
-
- u64 ch_rxcount; /* total of data received so far */
- u64 ch_txcount; /* total of data transmitted so far */
-
- u8 ch_r_tlevel; /* Receive Trigger level */
- u8 ch_t_tlevel; /* Transmit Trigger level */
-
- u8 ch_r_watermark; /* Receive Watermark */
-
-
- u32 ch_stops_sent; /* How many times I have sent a stop character
- * to try to stop the other guy sending.
- */
- u64 ch_err_parity; /* Count of parity errors on channel */
- u64 ch_err_frame; /* Count of framing errors on channel */
- u64 ch_err_break; /* Count of breaks on channel */
- u64 ch_err_overrun; /* Count of overruns on channel */
-
- u64 ch_xon_sends; /* Count of xons transmitted */
- u64 ch_xoff_sends; /* Count of xoffs transmitted */
-};
-
-
-/************************************************************************
- * Per channel/port NEO UART structure *
- ************************************************************************
- * Base Structure Entries Usage Meanings to Host *
- * *
- * W = read write R = read only *
- * U = Unused. *
- ************************************************************************/
-
-struct neo_uart_struct {
- u8 txrx; /* WR RHR/THR - Holding Reg */
- u8 ier; /* WR IER - Interrupt Enable Reg */
- u8 isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg */
- u8 lcr; /* WR LCR - Line Control Reg */
- u8 mcr; /* WR MCR - Modem Control Reg */
- u8 lsr; /* WR LSR - Line Status Reg */
- u8 msr; /* WR MSR - Modem Status Reg */
- u8 spr; /* WR SPR - Scratch Pad Reg */
- u8 fctr; /* WR FCTR - Feature Control Reg */
- u8 efr; /* WR EFR - Enhanced Function Reg */
- u8 tfifo; /* WR TXCNT/TXTRG - Transmit FIFO Reg */
- u8 rfifo; /* WR RXCNT/RXTRG - Recieve FIFO Reg */
- u8 xoffchar1; /* WR XOFF 1 - XOff Character 1 Reg */
- u8 xoffchar2; /* WR XOFF 2 - XOff Character 2 Reg */
- u8 xonchar1; /* WR XON 1 - Xon Character 1 Reg */
- u8 xonchar2; /* WR XON 2 - XOn Character 2 Reg */
-
- u8 reserved1[0x2ff - 0x200]; /* U Reserved by Exar */
- u8 txrxburst[64]; /* RW 64 bytes of RX/TX FIFO Data */
- u8 reserved2[0x37f - 0x340]; /* U Reserved by Exar */
- u8 rxburst_with_errors[64]; /* R 64 bytes of RX FIFO Data + LSR */
-};
-
-/* Where to read the extended interrupt register (32bits instead of 8bits) */
-#define UART_17158_POLL_ADDR_OFFSET 0x80
-
-/*
- * These are the redefinitions for the FCTR on the XR17C158, since
- * Exar made them different than their earlier design. (XR16C854)
- */
-
-/* These are only applicable when table D is selected */
-#define UART_17158_FCTR_RTS_NODELAY 0x00
-#define UART_17158_FCTR_RTS_4DELAY 0x01
-#define UART_17158_FCTR_RTS_6DELAY 0x02
-#define UART_17158_FCTR_RTS_8DELAY 0x03
-#define UART_17158_FCTR_RTS_12DELAY 0x12
-#define UART_17158_FCTR_RTS_16DELAY 0x05
-#define UART_17158_FCTR_RTS_20DELAY 0x13
-#define UART_17158_FCTR_RTS_24DELAY 0x06
-#define UART_17158_FCTR_RTS_28DELAY 0x14
-#define UART_17158_FCTR_RTS_32DELAY 0x07
-#define UART_17158_FCTR_RTS_36DELAY 0x16
-#define UART_17158_FCTR_RTS_40DELAY 0x08
-#define UART_17158_FCTR_RTS_44DELAY 0x09
-#define UART_17158_FCTR_RTS_48DELAY 0x10
-#define UART_17158_FCTR_RTS_52DELAY 0x11
-
-#define UART_17158_FCTR_RTS_IRDA 0x10
-#define UART_17158_FCTR_RS485 0x20
-#define UART_17158_FCTR_TRGA 0x00
-#define UART_17158_FCTR_TRGB 0x40
-#define UART_17158_FCTR_TRGC 0x80
-#define UART_17158_FCTR_TRGD 0xC0
-
-/* 17158 trigger table selects.. */
-#define UART_17158_FCTR_BIT6 0x40
-#define UART_17158_FCTR_BIT7 0x80
-
-/* 17158 TX/RX memmapped buffer offsets */
-#define UART_17158_RX_FIFOSIZE 64
-#define UART_17158_TX_FIFOSIZE 64
-
-/* 17158 Extended IIR's */
-#define UART_17158_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */
-#define UART_17158_IIR_XONXOFF 0x10 /* Received an XON/XOFF char */
-#define UART_17158_IIR_HWFLOW_STATE_CHANGE 0x20 /* CTS/DSR or RTS/DTR state change */
-#define UART_17158_IIR_FIFO_ENABLED 0xC0 /* 16550 FIFOs are Enabled */
-
-/*
- * These are the extended interrupts that get sent
- * back to us from the UART's 32bit interrupt register
- */
-#define UART_17158_RX_LINE_STATUS 0x1 /* RX Ready */
-#define UART_17158_RXRDY_TIMEOUT 0x2 /* RX Ready Timeout */
-#define UART_17158_TXRDY 0x3 /* TX Ready */
-#define UART_17158_MSR 0x4 /* Modem State Change */
-#define UART_17158_TX_AND_FIFO_CLR 0x40 /* Transmitter Holding Reg Empty */
-#define UART_17158_RX_FIFO_DATA_ERROR 0x80 /* UART detected an RX FIFO Data error */
-
-/*
- * These are the EXTENDED definitions for the 17C158's Interrupt
- * Enable Register.
- */
-#define UART_17158_EFR_ECB 0x10 /* Enhanced control bit */
-#define UART_17158_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */
-#define UART_17158_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */
-#define UART_17158_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */
-#define UART_17158_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */
-
-#define UART_17158_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */
-#define UART_17158_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */
-
-#define UART_17158_IER_RSVD1 0x10 /* Reserved by Exar */
-#define UART_17158_IER_XOFF 0x20 /* Xoff Interrupt Enable */
-#define UART_17158_IER_RTSDTR 0x40 /* Output Interrupt Enable */
-#define UART_17158_IER_CTSDSR 0x80 /* Input Interrupt Enable */
-
-#define PCI_DEVICE_NEO_2DB9_PCI_NAME "Neo 2 - DB9 Universal PCI"
-#define PCI_DEVICE_NEO_2DB9PRI_PCI_NAME "Neo 2 - DB9 Universal PCI - Powered Ring Indicator"
-#define PCI_DEVICE_NEO_2RJ45_PCI_NAME "Neo 2 - RJ45 Universal PCI"
-#define PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME "Neo 2 - RJ45 Universal PCI - Powered Ring Indicator"
-#define PCIE_DEVICE_NEO_IBM_PCI_NAME "Neo 4 - PCI Express - IBM"
-
-/*
- * Our Global Variables.
- */
-extern struct uart_driver jsm_uart_driver;
-extern struct board_ops jsm_neo_ops;
-extern int jsm_debug;
-
-/*************************************************************************
- *
- * Prototypes for non-static functions used in more than one module
- *
- *************************************************************************/
-int jsm_tty_write(struct uart_port *port);
-int jsm_tty_init(struct jsm_board *);
-int jsm_uart_port_init(struct jsm_board *);
-int jsm_remove_uart_port(struct jsm_board *);
-void jsm_input(struct jsm_channel *ch);
-void jsm_check_queue_flow_control(struct jsm_channel *ch);
-
-#endif
diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c
deleted file mode 100644
index 18f548449c63..000000000000
--- a/drivers/serial/jsm/jsm_driver.c
+++ /dev/null
@@ -1,297 +0,0 @@
-/************************************************************************
- * Copyright 2003 Digi International (www.digi.com)
- *
- * Copyright (C) 2004 IBM Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * Contact Information:
- * Scott H Kilau <Scott_Kilau@digi.com>
- * Wendy Xiong <wendyx@us.ibm.com>
- *
- *
- ***********************************************************************/
-#include <linux/moduleparam.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-
-#include "jsm.h"
-
-MODULE_AUTHOR("Digi International, http://www.digi.com");
-MODULE_DESCRIPTION("Driver for the Digi International "
- "Neo PCI based product line");
-MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("jsm");
-
-#define JSM_DRIVER_NAME "jsm"
-#define NR_PORTS 32
-#define JSM_MINOR_START 0
-
-struct uart_driver jsm_uart_driver = {
- .owner = THIS_MODULE,
- .driver_name = JSM_DRIVER_NAME,
- .dev_name = "ttyn",
- .major = 0,
- .minor = JSM_MINOR_START,
- .nr = NR_PORTS,
-};
-
-static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
- pci_channel_state_t state);
-static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);
-static void jsm_io_resume(struct pci_dev *pdev);
-
-static struct pci_error_handlers jsm_err_handler = {
- .error_detected = jsm_io_error_detected,
- .slot_reset = jsm_io_slot_reset,
- .resume = jsm_io_resume,
-};
-
-int jsm_debug;
-module_param(jsm_debug, int, 0);
-MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
-
-static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
-{
- int rc = 0;
- struct jsm_board *brd;
- static int adapter_count = 0;
-
- rc = pci_enable_device(pdev);
- if (rc) {
- dev_err(&pdev->dev, "Device enable FAILED\n");
- goto out;
- }
-
- rc = pci_request_regions(pdev, "jsm");
- if (rc) {
- dev_err(&pdev->dev, "pci_request_region FAILED\n");
- goto out_disable_device;
- }
-
- brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL);
- if (!brd) {
- dev_err(&pdev->dev,
- "memory allocation for board structure failed\n");
- rc = -ENOMEM;
- goto out_release_regions;
- }
-
- /* store the info for the board we've found */
- brd->boardnum = adapter_count++;
- brd->pci_dev = pdev;
- if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM)
- brd->maxports = 4;
- else if (pdev->device == PCI_DEVICE_ID_DIGI_NEO_8)
- brd->maxports = 8;
- else
- brd->maxports = 2;
-
- spin_lock_init(&brd->bd_intr_lock);
-
- /* store which revision we have */
- brd->rev = pdev->revision;
-
- brd->irq = pdev->irq;
-
- jsm_printk(INIT, INFO, &brd->pci_dev,
- "jsm_found_board - NEO adapter\n");
-
- /* get the PCI Base Address Registers */
- brd->membase = pci_resource_start(pdev, 0);
- brd->membase_end = pci_resource_end(pdev, 0);
-
- if (brd->membase & 1)
- brd->membase &= ~3;
- else
- brd->membase &= ~15;
-
- /* Assign the board_ops struct */
- brd->bd_ops = &jsm_neo_ops;
-
- brd->bd_uart_offset = 0x200;
- brd->bd_dividend = 921600;
-
- brd->re_map_membase = ioremap(brd->membase, 0x1000);
- if (!brd->re_map_membase) {
- dev_err(&pdev->dev,
- "card has no PCI Memory resources, "
- "failing board.\n");
- rc = -ENOMEM;
- goto out_kfree_brd;
- }
-
- rc = request_irq(brd->irq, brd->bd_ops->intr,
- IRQF_SHARED, "JSM", brd);
- if (rc) {
- printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
- goto out_iounmap;
- }
-
- rc = jsm_tty_init(brd);
- if (rc < 0) {
- dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
- rc = -ENXIO;
- goto out_free_irq;
- }
-
- rc = jsm_uart_port_init(brd);
- if (rc < 0) {
- /* XXX: leaking all resources from jsm_tty_init here! */
- dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
- rc = -ENXIO;
- goto out_free_irq;
- }
-
- /* Log the information about the board */
- dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
- adapter_count, brd->rev, brd->irq);
-
- /*
- * allocate flip buffer for board.
- *
- * Okay to malloc with GFP_KERNEL, we are not at interrupt
- * context, and there are no locks held.
- */
- brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
- if (!brd->flipbuf) {
- /* XXX: leaking all resources from jsm_tty_init and
- jsm_uart_port_init here! */
- dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
- rc = -ENOMEM;
- goto out_free_uart;
- }
-
- pci_set_drvdata(pdev, brd);
- pci_save_state(pdev);
-
- return 0;
- out_free_uart:
- jsm_remove_uart_port(brd);
- out_free_irq:
- jsm_remove_uart_port(brd);
- free_irq(brd->irq, brd);
- out_iounmap:
- iounmap(brd->re_map_membase);
- out_kfree_brd:
- kfree(brd);
- out_release_regions:
- pci_release_regions(pdev);
- out_disable_device:
- pci_disable_device(pdev);
- out:
- return rc;
-}
-
-static void __devexit jsm_remove_one(struct pci_dev *pdev)
-{
- struct jsm_board *brd = pci_get_drvdata(pdev);
- int i = 0;
-
- jsm_remove_uart_port(brd);
-
- free_irq(brd->irq, brd);
- iounmap(brd->re_map_membase);
-
- /* Free all allocated channels structs */
- for (i = 0; i < brd->maxports; i++) {
- if (brd->channels[i]) {
- kfree(brd->channels[i]->ch_rqueue);
- kfree(brd->channels[i]->ch_equeue);
- kfree(brd->channels[i]->ch_wqueue);
- kfree(brd->channels[i]);
- }
- }
-
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- kfree(brd->flipbuf);
- kfree(brd);
-}
-
-static struct pci_device_id jsm_pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
- { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
- { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
- { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
- { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
- { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
- { 0, }
-};
-MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
-
-static struct pci_driver jsm_driver = {
- .name = "jsm",
- .id_table = jsm_pci_tbl,
- .probe = jsm_probe_one,
- .remove = __devexit_p(jsm_remove_one),
- .err_handler = &jsm_err_handler,
-};
-
-static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
- pci_channel_state_t state)
-{
- struct jsm_board *brd = pci_get_drvdata(pdev);
-
- jsm_remove_uart_port(brd);
-
- return PCI_ERS_RESULT_NEED_RESET;
-}
-
-static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
-{
- int rc;
-
- rc = pci_enable_device(pdev);
-
- if (rc)
- return PCI_ERS_RESULT_DISCONNECT;
-
- pci_set_master(pdev);
-
- return PCI_ERS_RESULT_RECOVERED;
-}
-
-static void jsm_io_resume(struct pci_dev *pdev)
-{
- struct jsm_board *brd = pci_get_drvdata(pdev);
-
- pci_restore_state(pdev);
-
- jsm_uart_port_init(brd);
-}
-
-static int __init jsm_init_module(void)
-{
- int rc;
-
- rc = uart_register_driver(&jsm_uart_driver);
- if (!rc) {
- rc = pci_register_driver(&jsm_driver);
- if (rc)
- uart_unregister_driver(&jsm_uart_driver);
- }
- return rc;
-}
-
-static void __exit jsm_exit_module(void)
-{
- pci_unregister_driver(&jsm_driver);
- uart_unregister_driver(&jsm_uart_driver);
-}
-
-module_init(jsm_init_module);
-module_exit(jsm_exit_module);
diff --git a/drivers/serial/jsm/jsm_neo.c b/drivers/serial/jsm/jsm_neo.c
deleted file mode 100644
index 7960d9633c15..000000000000
--- a/drivers/serial/jsm/jsm_neo.c
+++ /dev/null
@@ -1,1412 +0,0 @@
-/************************************************************************
- * Copyright 2003 Digi International (www.digi.com)
- *
- * Copyright (C) 2004 IBM Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * Contact Information:
- * Scott H Kilau <Scott_Kilau@digi.com>
- * Wendy Xiong <wendyx@us.ibm.com>
- *
- ***********************************************************************/
-#include <linux/delay.h> /* For udelay */
-#include <linux/serial_reg.h> /* For the various UART offsets */
-#include <linux/tty.h>
-#include <linux/pci.h>
-#include <asm/io.h>
-
-#include "jsm.h" /* Driver main header file */
-
-static u32 jsm_offset_table[8] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 };
-
-/*
- * This function allows calls to ensure that all outstanding
- * PCI writes have been completed, by doing a PCI read against
- * a non-destructive, read-only location on the Neo card.
- *
- * In this case, we are reading the DVID (Read-only Device Identification)
- * value of the Neo card.
- */
-static inline void neo_pci_posting_flush(struct jsm_board *bd)
-{
- readb(bd->re_map_membase + 0x8D);
-}
-
-static void neo_set_cts_flow_control(struct jsm_channel *ch)
-{
- u8 ier, efr;
- ier = readb(&ch->ch_neo_uart->ier);
- efr = readb(&ch->ch_neo_uart->efr);
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting CTSFLOW\n");
-
- /* Turn on auto CTS flow control */
- ier |= (UART_17158_IER_CTSDSR);
- efr |= (UART_17158_EFR_ECB | UART_17158_EFR_CTSDSR);
-
- /* Turn off auto Xon flow control */
- efr &= ~(UART_17158_EFR_IXON);
-
- /* Why? Becuz Exar's spec says we have to zero it out before setting it */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Turn on UART enhanced bits */
- writeb(efr, &ch->ch_neo_uart->efr);
-
- /* Turn on table D, with 8 char hi/low watermarks */
- writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr);
-
- /* Feed the UART our trigger levels */
- writeb(8, &ch->ch_neo_uart->tfifo);
- ch->ch_t_tlevel = 8;
-
- writeb(ier, &ch->ch_neo_uart->ier);
-}
-
-static void neo_set_rts_flow_control(struct jsm_channel *ch)
-{
- u8 ier, efr;
- ier = readb(&ch->ch_neo_uart->ier);
- efr = readb(&ch->ch_neo_uart->efr);
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting RTSFLOW\n");
-
- /* Turn on auto RTS flow control */
- ier |= (UART_17158_IER_RTSDTR);
- efr |= (UART_17158_EFR_ECB | UART_17158_EFR_RTSDTR);
-
- /* Turn off auto Xoff flow control */
- ier &= ~(UART_17158_IER_XOFF);
- efr &= ~(UART_17158_EFR_IXOFF);
-
- /* Why? Becuz Exar's spec says we have to zero it out before setting it */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Turn on UART enhanced bits */
- writeb(efr, &ch->ch_neo_uart->efr);
-
- writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr);
- ch->ch_r_watermark = 4;
-
- writeb(56, &ch->ch_neo_uart->rfifo);
- ch->ch_r_tlevel = 56;
-
- writeb(ier, &ch->ch_neo_uart->ier);
-
- /*
- * From the Neo UART spec sheet:
- * The auto RTS/DTR function must be started by asserting
- * RTS/DTR# output pin (MCR bit-0 or 1 to logic 1 after
- * it is enabled.
- */
- ch->ch_mostat |= (UART_MCR_RTS);
-}
-
-
-static void neo_set_ixon_flow_control(struct jsm_channel *ch)
-{
- u8 ier, efr;
- ier = readb(&ch->ch_neo_uart->ier);
- efr = readb(&ch->ch_neo_uart->efr);
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXON FLOW\n");
-
- /* Turn off auto CTS flow control */
- ier &= ~(UART_17158_IER_CTSDSR);
- efr &= ~(UART_17158_EFR_CTSDSR);
-
- /* Turn on auto Xon flow control */
- efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXON);
-
- /* Why? Becuz Exar's spec says we have to zero it out before setting it */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Turn on UART enhanced bits */
- writeb(efr, &ch->ch_neo_uart->efr);
-
- writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr);
- ch->ch_r_watermark = 4;
-
- writeb(32, &ch->ch_neo_uart->rfifo);
- ch->ch_r_tlevel = 32;
-
- /* Tell UART what start/stop chars it should be looking for */
- writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1);
- writeb(0, &ch->ch_neo_uart->xonchar2);
-
- writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1);
- writeb(0, &ch->ch_neo_uart->xoffchar2);
-
- writeb(ier, &ch->ch_neo_uart->ier);
-}
-
-static void neo_set_ixoff_flow_control(struct jsm_channel *ch)
-{
- u8 ier, efr;
- ier = readb(&ch->ch_neo_uart->ier);
- efr = readb(&ch->ch_neo_uart->efr);
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXOFF FLOW\n");
-
- /* Turn off auto RTS flow control */
- ier &= ~(UART_17158_IER_RTSDTR);
- efr &= ~(UART_17158_EFR_RTSDTR);
-
- /* Turn on auto Xoff flow control */
- ier |= (UART_17158_IER_XOFF);
- efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXOFF);
-
- /* Why? Becuz Exar's spec says we have to zero it out before setting it */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Turn on UART enhanced bits */
- writeb(efr, &ch->ch_neo_uart->efr);
-
- /* Turn on table D, with 8 char hi/low watermarks */
- writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr);
-
- writeb(8, &ch->ch_neo_uart->tfifo);
- ch->ch_t_tlevel = 8;
-
- /* Tell UART what start/stop chars it should be looking for */
- writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1);
- writeb(0, &ch->ch_neo_uart->xonchar2);
-
- writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1);
- writeb(0, &ch->ch_neo_uart->xoffchar2);
-
- writeb(ier, &ch->ch_neo_uart->ier);
-}
-
-static void neo_set_no_input_flow_control(struct jsm_channel *ch)
-{
- u8 ier, efr;
- ier = readb(&ch->ch_neo_uart->ier);
- efr = readb(&ch->ch_neo_uart->efr);
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Input FLOW\n");
-
- /* Turn off auto RTS flow control */
- ier &= ~(UART_17158_IER_RTSDTR);
- efr &= ~(UART_17158_EFR_RTSDTR);
-
- /* Turn off auto Xoff flow control */
- ier &= ~(UART_17158_IER_XOFF);
- if (ch->ch_c_iflag & IXON)
- efr &= ~(UART_17158_EFR_IXOFF);
- else
- efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXOFF);
-
- /* Why? Becuz Exar's spec says we have to zero it out before setting it */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Turn on UART enhanced bits */
- writeb(efr, &ch->ch_neo_uart->efr);
-
- /* Turn on table D, with 8 char hi/low watermarks */
- writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr);
-
- ch->ch_r_watermark = 0;
-
- writeb(16, &ch->ch_neo_uart->tfifo);
- ch->ch_t_tlevel = 16;
-
- writeb(16, &ch->ch_neo_uart->rfifo);
- ch->ch_r_tlevel = 16;
-
- writeb(ier, &ch->ch_neo_uart->ier);
-}
-
-static void neo_set_no_output_flow_control(struct jsm_channel *ch)
-{
- u8 ier, efr;
- ier = readb(&ch->ch_neo_uart->ier);
- efr = readb(&ch->ch_neo_uart->efr);
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Output FLOW\n");
-
- /* Turn off auto CTS flow control */
- ier &= ~(UART_17158_IER_CTSDSR);
- efr &= ~(UART_17158_EFR_CTSDSR);
-
- /* Turn off auto Xon flow control */
- if (ch->ch_c_iflag & IXOFF)
- efr &= ~(UART_17158_EFR_IXON);
- else
- efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXON);
-
- /* Why? Becuz Exar's spec says we have to zero it out before setting it */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Turn on UART enhanced bits */
- writeb(efr, &ch->ch_neo_uart->efr);
-
- /* Turn on table D, with 8 char hi/low watermarks */
- writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr);
-
- ch->ch_r_watermark = 0;
-
- writeb(16, &ch->ch_neo_uart->tfifo);
- ch->ch_t_tlevel = 16;
-
- writeb(16, &ch->ch_neo_uart->rfifo);
- ch->ch_r_tlevel = 16;
-
- writeb(ier, &ch->ch_neo_uart->ier);
-}
-
-static inline void neo_set_new_start_stop_chars(struct jsm_channel *ch)
-{
-
- /* if hardware flow control is set, then skip this whole thing */
- if (ch->ch_c_cflag & CRTSCTS)
- return;
-
- jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "start\n");
-
- /* Tell UART what start/stop chars it should be looking for */
- writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1);
- writeb(0, &ch->ch_neo_uart->xonchar2);
-
- writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1);
- writeb(0, &ch->ch_neo_uart->xoffchar2);
-}
-
-static void neo_copy_data_from_uart_to_queue(struct jsm_channel *ch)
-{
- int qleft = 0;
- u8 linestatus = 0;
- u8 error_mask = 0;
- int n = 0;
- int total = 0;
- u16 head;
- u16 tail;
-
- if (!ch)
- return;
-
- /* cache head and tail of queue */
- head = ch->ch_r_head & RQUEUEMASK;
- tail = ch->ch_r_tail & RQUEUEMASK;
-
- /* Get our cached LSR */
- linestatus = ch->ch_cached_lsr;
- ch->ch_cached_lsr = 0;
-
- /* Store how much space we have left in the queue */
- if ((qleft = tail - head - 1) < 0)
- qleft += RQUEUEMASK + 1;
-
- /*
- * If the UART is not in FIFO mode, force the FIFO copy to
- * NOT be run, by setting total to 0.
- *
- * On the other hand, if the UART IS in FIFO mode, then ask
- * the UART to give us an approximation of data it has RX'ed.
- */
- if (!(ch->ch_flags & CH_FIFO_ENABLED))
- total = 0;
- else {
- total = readb(&ch->ch_neo_uart->rfifo);
-
- /*
- * EXAR chip bug - RX FIFO COUNT - Fudge factor.
- *
- * This resolves a problem/bug with the Exar chip that sometimes
- * returns a bogus value in the rfifo register.
- * The count can be any where from 0-3 bytes "off".
- * Bizarre, but true.
- */
- total -= 3;
- }
-
- /*
- * Finally, bound the copy to make sure we don't overflow
- * our own queue...
- * The byte by byte copy loop below this loop this will
- * deal with the queue overflow possibility.
- */
- total = min(total, qleft);
-
- while (total > 0) {
- /*
- * Grab the linestatus register, we need to check
- * to see if there are any errors in the FIFO.
- */
- linestatus = readb(&ch->ch_neo_uart->lsr);
-
- /*
- * Break out if there is a FIFO error somewhere.
- * This will allow us to go byte by byte down below,
- * finding the exact location of the error.
- */
- if (linestatus & UART_17158_RX_FIFO_DATA_ERROR)
- break;
-
- /* Make sure we don't go over the end of our queue */
- n = min(((u32) total), (RQUEUESIZE - (u32) head));
-
- /*
- * Cut down n even further if needed, this is to fix
- * a problem with memcpy_fromio() with the Neo on the
- * IBM pSeries platform.
- * 15 bytes max appears to be the magic number.
- */
- n = min((u32) n, (u32) 12);
-
- /*
- * Since we are grabbing the linestatus register, which
- * will reset some bits after our read, we need to ensure
- * we don't miss our TX FIFO emptys.
- */
- if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR))
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
-
- linestatus = 0;
-
- /* Copy data from uart to the queue */
- memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, n);
- /*
- * Since RX_FIFO_DATA_ERROR was 0, we are guarenteed
- * that all the data currently in the FIFO is free of
- * breaks and parity/frame/orun errors.
- */
- memset(ch->ch_equeue + head, 0, n);
-
- /* Add to and flip head if needed */
- head = (head + n) & RQUEUEMASK;
- total -= n;
- qleft -= n;
- ch->ch_rxcount += n;
- }
-
- /*
- * Create a mask to determine whether we should
- * insert the character (if any) into our queue.
- */
- if (ch->ch_c_iflag & IGNBRK)
- error_mask |= UART_LSR_BI;
-
- /*
- * Now cleanup any leftover bytes still in the UART.
- * Also deal with any possible queue overflow here as well.
- */
- while (1) {
-
- /*
- * Its possible we have a linestatus from the loop above
- * this, so we "OR" on any extra bits.
- */
- linestatus |= readb(&ch->ch_neo_uart->lsr);
-
- /*
- * If the chip tells us there is no more data pending to
- * be read, we can then leave.
- * But before we do, cache the linestatus, just in case.
- */
- if (!(linestatus & UART_LSR_DR)) {
- ch->ch_cached_lsr = linestatus;
- break;
- }
-
- /* No need to store this bit */
- linestatus &= ~UART_LSR_DR;
-
- /*
- * Since we are grabbing the linestatus register, which
- * will reset some bits after our read, we need to ensure
- * we don't miss our TX FIFO emptys.
- */
- if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) {
- linestatus &= ~(UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR);
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
- }
-
- /*
- * Discard character if we are ignoring the error mask.
- */
- if (linestatus & error_mask) {
- u8 discard;
- linestatus = 0;
- memcpy_fromio(&discard, &ch->ch_neo_uart->txrxburst, 1);
- continue;
- }
-
- /*
- * If our queue is full, we have no choice but to drop some data.
- * The assumption is that HWFLOW or SWFLOW should have stopped
- * things way way before we got to this point.
- *
- * I decided that I wanted to ditch the oldest data first,
- * I hope thats okay with everyone? Yes? Good.
- */
- while (qleft < 1) {
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "Queue full, dropping DATA:%x LSR:%x\n",
- ch->ch_rqueue[tail], ch->ch_equeue[tail]);
-
- ch->ch_r_tail = tail = (tail + 1) & RQUEUEMASK;
- ch->ch_err_overrun++;
- qleft++;
- }
-
- memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, 1);
- ch->ch_equeue[head] = (u8) linestatus;
-
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "DATA/LSR pair: %x %x\n", ch->ch_rqueue[head], ch->ch_equeue[head]);
-
- /* Ditch any remaining linestatus value. */
- linestatus = 0;
-
- /* Add to and flip head if needed */
- head = (head + 1) & RQUEUEMASK;
-
- qleft--;
- ch->ch_rxcount++;
- }
-
- /*
- * Write new final heads to channel structure.
- */
- ch->ch_r_head = head & RQUEUEMASK;
- ch->ch_e_head = head & EQUEUEMASK;
- jsm_input(ch);
-}
-
-static void neo_copy_data_from_queue_to_uart(struct jsm_channel *ch)
-{
- u16 head;
- u16 tail;
- int n;
- int s;
- int qlen;
- u32 len_written = 0;
-
- if (!ch)
- return;
-
- /* No data to write to the UART */
- if (ch->ch_w_tail == ch->ch_w_head)
- return;
-
- /* If port is "stopped", don't send any data to the UART */
- if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_BREAK_SENDING))
- return;
- /*
- * If FIFOs are disabled. Send data directly to txrx register
- */
- if (!(ch->ch_flags & CH_FIFO_ENABLED)) {
- u8 lsrbits = readb(&ch->ch_neo_uart->lsr);
-
- ch->ch_cached_lsr |= lsrbits;
- if (ch->ch_cached_lsr & UART_LSR_THRE) {
- ch->ch_cached_lsr &= ~(UART_LSR_THRE);
-
- writeb(ch->ch_wqueue[ch->ch_w_tail], &ch->ch_neo_uart->txrx);
- jsm_printk(WRITE, INFO, &ch->ch_bd->pci_dev,
- "Tx data: %x\n", ch->ch_wqueue[ch->ch_w_head]);
- ch->ch_w_tail++;
- ch->ch_w_tail &= WQUEUEMASK;
- ch->ch_txcount++;
- }
- return;
- }
-
- /*
- * We have to do it this way, because of the EXAR TXFIFO count bug.
- */
- if (!(ch->ch_flags & (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM)))
- return;
-
- n = UART_17158_TX_FIFOSIZE - ch->ch_t_tlevel;
-
- /* cache head and tail of queue */
- head = ch->ch_w_head & WQUEUEMASK;
- tail = ch->ch_w_tail & WQUEUEMASK;
- qlen = (head - tail) & WQUEUEMASK;
-
- /* Find minimum of the FIFO space, versus queue length */
- n = min(n, qlen);
-
- while (n > 0) {
-
- s = ((head >= tail) ? head : WQUEUESIZE) - tail;
- s = min(s, n);
-
- if (s <= 0)
- break;
-
- memcpy_toio(&ch->ch_neo_uart->txrxburst, ch->ch_wqueue + tail, s);
- /* Add and flip queue if needed */
- tail = (tail + s) & WQUEUEMASK;
- n -= s;
- ch->ch_txcount += s;
- len_written += s;
- }
-
- /* Update the final tail */
- ch->ch_w_tail = tail & WQUEUEMASK;
-
- if (len_written >= ch->ch_t_tlevel)
- ch->ch_flags &= ~(CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
-
- if (!jsm_tty_write(&ch->uart_port))
- uart_write_wakeup(&ch->uart_port);
-}
-
-static void neo_parse_modem(struct jsm_channel *ch, u8 signals)
-{
- u8 msignals = signals;
-
- jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev,
- "neo_parse_modem: port: %d msignals: %x\n", ch->ch_portnum, msignals);
-
- /* Scrub off lower bits. They signify delta's, which I don't care about */
- /* Keep DDCD and DDSR though */
- msignals &= 0xf8;
-
- if (msignals & UART_MSR_DDCD)
- uart_handle_dcd_change(&ch->uart_port, msignals & UART_MSR_DCD);
- if (msignals & UART_MSR_DDSR)
- uart_handle_cts_change(&ch->uart_port, msignals & UART_MSR_CTS);
- if (msignals & UART_MSR_DCD)
- ch->ch_mistat |= UART_MSR_DCD;
- else
- ch->ch_mistat &= ~UART_MSR_DCD;
-
- if (msignals & UART_MSR_DSR)
- ch->ch_mistat |= UART_MSR_DSR;
- else
- ch->ch_mistat &= ~UART_MSR_DSR;
-
- if (msignals & UART_MSR_RI)
- ch->ch_mistat |= UART_MSR_RI;
- else
- ch->ch_mistat &= ~UART_MSR_RI;
-
- if (msignals & UART_MSR_CTS)
- ch->ch_mistat |= UART_MSR_CTS;
- else
- ch->ch_mistat &= ~UART_MSR_CTS;
-
- jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev,
- "Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n",
- ch->ch_portnum,
- !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_DTR),
- !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_RTS),
- !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_CTS),
- !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DSR),
- !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_RI),
- !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DCD));
-}
-
-/* Make the UART raise any of the output signals we want up */
-static void neo_assert_modem_signals(struct jsm_channel *ch)
-{
- if (!ch)
- return;
-
- writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
-}
-
-/*
- * Flush the WRITE FIFO on the Neo.
- *
- * NOTE: Channel lock MUST be held before calling this function!
- */
-static void neo_flush_uart_write(struct jsm_channel *ch)
-{
- u8 tmp = 0;
- int i = 0;
-
- if (!ch)
- return;
-
- writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr);
-
- for (i = 0; i < 10; i++) {
-
- /* Check to see if the UART feels it completely flushed the FIFO. */
- tmp = readb(&ch->ch_neo_uart->isr_fcr);
- if (tmp & 4) {
- jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev,
- "Still flushing TX UART... i: %d\n", i);
- udelay(10);
- }
- else
- break;
- }
-
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
-}
-
-
-/*
- * Flush the READ FIFO on the Neo.
- *
- * NOTE: Channel lock MUST be held before calling this function!
- */
-static void neo_flush_uart_read(struct jsm_channel *ch)
-{
- u8 tmp = 0;
- int i = 0;
-
- if (!ch)
- return;
-
- writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR), &ch->ch_neo_uart->isr_fcr);
-
- for (i = 0; i < 10; i++) {
-
- /* Check to see if the UART feels it completely flushed the FIFO. */
- tmp = readb(&ch->ch_neo_uart->isr_fcr);
- if (tmp & 2) {
- jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev,
- "Still flushing RX UART... i: %d\n", i);
- udelay(10);
- }
- else
- break;
- }
-}
-
-/*
- * No locks are assumed to be held when calling this function.
- */
-static void neo_clear_break(struct jsm_channel *ch, int force)
-{
- unsigned long lock_flags;
-
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
-
- /* Turn break off, and unset some variables */
- if (ch->ch_flags & CH_BREAK_SENDING) {
- u8 temp = readb(&ch->ch_neo_uart->lcr);
- writeb((temp & ~UART_LCR_SBC), &ch->ch_neo_uart->lcr);
-
- ch->ch_flags &= ~(CH_BREAK_SENDING);
- jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev,
- "clear break Finishing UART_LCR_SBC! finished: %lx\n", jiffies);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
- }
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
-}
-
-/*
- * Parse the ISR register.
- */
-static inline void neo_parse_isr(struct jsm_board *brd, u32 port)
-{
- struct jsm_channel *ch;
- u8 isr;
- u8 cause;
- unsigned long lock_flags;
-
- if (!brd)
- return;
-
- if (port > brd->maxports)
- return;
-
- ch = brd->channels[port];
- if (!ch)
- return;
-
- /* Here we try to figure out what caused the interrupt to happen */
- while (1) {
-
- isr = readb(&ch->ch_neo_uart->isr_fcr);
-
- /* Bail if no pending interrupt */
- if (isr & UART_IIR_NO_INT)
- break;
-
- /*
- * Yank off the upper 2 bits, which just show that the FIFO's are enabled.
- */
- isr &= ~(UART_17158_IIR_FIFO_ENABLED);
-
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "%s:%d isr: %x\n", __FILE__, __LINE__, isr);
-
- if (isr & (UART_17158_IIR_RDI_TIMEOUT | UART_IIR_RDI)) {
- /* Read data from uart -> queue */
- neo_copy_data_from_uart_to_queue(ch);
-
- /* Call our tty layer to enforce queue flow control if needed. */
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- jsm_check_queue_flow_control(ch);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- }
-
- if (isr & UART_IIR_THRI) {
- /* Transfer data (if any) from Write Queue -> UART. */
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- neo_copy_data_from_queue_to_uart(ch);
- }
-
- if (isr & UART_17158_IIR_XONXOFF) {
- cause = readb(&ch->ch_neo_uart->xoffchar1);
-
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "Port %d. Got ISR_XONXOFF: cause:%x\n", port, cause);
-
- /*
- * Since the UART detected either an XON or
- * XOFF match, we need to figure out which
- * one it was, so we can suspend or resume data flow.
- */
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- if (cause == UART_17158_XON_DETECT) {
- /* Is output stopped right now, if so, resume it */
- if (brd->channels[port]->ch_flags & CH_STOP) {
- ch->ch_flags &= ~(CH_STOP);
- }
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "Port %d. XON detected in incoming data\n", port);
- }
- else if (cause == UART_17158_XOFF_DETECT) {
- if (!(brd->channels[port]->ch_flags & CH_STOP)) {
- ch->ch_flags |= CH_STOP;
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "Setting CH_STOP\n");
- }
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "Port: %d. XOFF detected in incoming data\n", port);
- }
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- }
-
- if (isr & UART_17158_IIR_HWFLOW_STATE_CHANGE) {
- /*
- * If we get here, this means the hardware is doing auto flow control.
- * Check to see whether RTS/DTR or CTS/DSR caused this interrupt.
- */
- cause = readb(&ch->ch_neo_uart->mcr);
-
- /* Which pin is doing auto flow? RTS or DTR? */
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- if ((cause & 0x4) == 0) {
- if (cause & UART_MCR_RTS)
- ch->ch_mostat |= UART_MCR_RTS;
- else
- ch->ch_mostat &= ~(UART_MCR_RTS);
- } else {
- if (cause & UART_MCR_DTR)
- ch->ch_mostat |= UART_MCR_DTR;
- else
- ch->ch_mostat &= ~(UART_MCR_DTR);
- }
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- }
-
- /* Parse any modem signal changes */
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "MOD_STAT: sending to parse_modem_sigs\n");
- neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr));
- }
-}
-
-static inline void neo_parse_lsr(struct jsm_board *brd, u32 port)
-{
- struct jsm_channel *ch;
- int linestatus;
- unsigned long lock_flags;
-
- if (!brd)
- return;
-
- if (port > brd->maxports)
- return;
-
- ch = brd->channels[port];
- if (!ch)
- return;
-
- linestatus = readb(&ch->ch_neo_uart->lsr);
-
- jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
- "%s:%d port: %d linestatus: %x\n", __FILE__, __LINE__, port, linestatus);
-
- ch->ch_cached_lsr |= linestatus;
-
- if (ch->ch_cached_lsr & UART_LSR_DR) {
- /* Read data from uart -> queue */
- neo_copy_data_from_uart_to_queue(ch);
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- jsm_check_queue_flow_control(ch);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- }
-
- /*
- * This is a special flag. It indicates that at least 1
- * RX error (parity, framing, or break) has happened.
- * Mark this in our struct, which will tell me that I have
- *to do the special RX+LSR read for this FIFO load.
- */
- if (linestatus & UART_17158_RX_FIFO_DATA_ERROR)
- jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
- "%s:%d Port: %d Got an RX error, need to parse LSR\n",
- __FILE__, __LINE__, port);
-
- /*
- * The next 3 tests should *NOT* happen, as the above test
- * should encapsulate all 3... At least, thats what Exar says.
- */
-
- if (linestatus & UART_LSR_PE) {
- ch->ch_err_parity++;
- jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
- "%s:%d Port: %d. PAR ERR!\n", __FILE__, __LINE__, port);
- }
-
- if (linestatus & UART_LSR_FE) {
- ch->ch_err_frame++;
- jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
- "%s:%d Port: %d. FRM ERR!\n", __FILE__, __LINE__, port);
- }
-
- if (linestatus & UART_LSR_BI) {
- ch->ch_err_break++;
- jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
- "%s:%d Port: %d. BRK INTR!\n", __FILE__, __LINE__, port);
- }
-
- if (linestatus & UART_LSR_OE) {
- /*
- * Rx Oruns. Exar says that an orun will NOT corrupt
- * the FIFO. It will just replace the holding register
- * with this new data byte. So basically just ignore this.
- * Probably we should eventually have an orun stat in our driver...
- */
- ch->ch_err_overrun++;
- jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
- "%s:%d Port: %d. Rx Overrun!\n", __FILE__, __LINE__, port);
- }
-
- if (linestatus & UART_LSR_THRE) {
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
-
- /* Transfer data (if any) from Write Queue -> UART. */
- neo_copy_data_from_queue_to_uart(ch);
- }
- else if (linestatus & UART_17158_TX_AND_FIFO_CLR) {
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
-
- /* Transfer data (if any) from Write Queue -> UART. */
- neo_copy_data_from_queue_to_uart(ch);
- }
-}
-
-/*
- * neo_param()
- * Send any/all changes to the line to the UART.
- */
-static void neo_param(struct jsm_channel *ch)
-{
- u8 lcr = 0;
- u8 uart_lcr, ier;
- u32 baud;
- int quot;
- struct jsm_board *bd;
-
- bd = ch->ch_bd;
- if (!bd)
- return;
-
- /*
- * If baud rate is zero, flush queues, and set mval to drop DTR.
- */
- if ((ch->ch_c_cflag & (CBAUD)) == 0) {
- ch->ch_r_head = ch->ch_r_tail = 0;
- ch->ch_e_head = ch->ch_e_tail = 0;
- ch->ch_w_head = ch->ch_w_tail = 0;
-
- neo_flush_uart_write(ch);
- neo_flush_uart_read(ch);
-
- ch->ch_flags |= (CH_BAUD0);
- ch->ch_mostat &= ~(UART_MCR_RTS | UART_MCR_DTR);
- neo_assert_modem_signals(ch);
- return;
-
- } else {
- int i;
- unsigned int cflag;
- static struct {
- unsigned int rate;
- unsigned int cflag;
- } baud_rates[] = {
- { 921600, B921600 },
- { 460800, B460800 },
- { 230400, B230400 },
- { 115200, B115200 },
- { 57600, B57600 },
- { 38400, B38400 },
- { 19200, B19200 },
- { 9600, B9600 },
- { 4800, B4800 },
- { 2400, B2400 },
- { 1200, B1200 },
- { 600, B600 },
- { 300, B300 },
- { 200, B200 },
- { 150, B150 },
- { 134, B134 },
- { 110, B110 },
- { 75, B75 },
- { 50, B50 },
- };
-
- cflag = C_BAUD(ch->uart_port.state->port.tty);
- baud = 9600;
- for (i = 0; i < ARRAY_SIZE(baud_rates); i++) {
- if (baud_rates[i].cflag == cflag) {
- baud = baud_rates[i].rate;
- break;
- }
- }
-
- if (ch->ch_flags & CH_BAUD0)
- ch->ch_flags &= ~(CH_BAUD0);
- }
-
- if (ch->ch_c_cflag & PARENB)
- lcr |= UART_LCR_PARITY;
-
- if (!(ch->ch_c_cflag & PARODD))
- lcr |= UART_LCR_EPAR;
-
- /*
- * Not all platforms support mark/space parity,
- * so this will hide behind an ifdef.
- */
-#ifdef CMSPAR
- if (ch->ch_c_cflag & CMSPAR)
- lcr |= UART_LCR_SPAR;
-#endif
-
- if (ch->ch_c_cflag & CSTOPB)
- lcr |= UART_LCR_STOP;
-
- switch (ch->ch_c_cflag & CSIZE) {
- case CS5:
- lcr |= UART_LCR_WLEN5;
- break;
- case CS6:
- lcr |= UART_LCR_WLEN6;
- break;
- case CS7:
- lcr |= UART_LCR_WLEN7;
- break;
- case CS8:
- default:
- lcr |= UART_LCR_WLEN8;
- break;
- }
-
- ier = readb(&ch->ch_neo_uart->ier);
- uart_lcr = readb(&ch->ch_neo_uart->lcr);
-
- if (baud == 0)
- baud = 9600;
-
- quot = ch->ch_bd->bd_dividend / baud;
-
- if (quot != 0) {
- writeb(UART_LCR_DLAB, &ch->ch_neo_uart->lcr);
- writeb((quot & 0xff), &ch->ch_neo_uart->txrx);
- writeb((quot >> 8), &ch->ch_neo_uart->ier);
- writeb(lcr, &ch->ch_neo_uart->lcr);
- }
-
- if (uart_lcr != lcr)
- writeb(lcr, &ch->ch_neo_uart->lcr);
-
- if (ch->ch_c_cflag & CREAD)
- ier |= (UART_IER_RDI | UART_IER_RLSI);
-
- ier |= (UART_IER_THRI | UART_IER_MSI);
-
- writeb(ier, &ch->ch_neo_uart->ier);
-
- /* Set new start/stop chars */
- neo_set_new_start_stop_chars(ch);
-
- if (ch->ch_c_cflag & CRTSCTS)
- neo_set_cts_flow_control(ch);
- else if (ch->ch_c_iflag & IXON) {
- /* If start/stop is set to disable, then we should disable flow control */
- if ((ch->ch_startc == __DISABLED_CHAR) || (ch->ch_stopc == __DISABLED_CHAR))
- neo_set_no_output_flow_control(ch);
- else
- neo_set_ixon_flow_control(ch);
- }
- else
- neo_set_no_output_flow_control(ch);
-
- if (ch->ch_c_cflag & CRTSCTS)
- neo_set_rts_flow_control(ch);
- else if (ch->ch_c_iflag & IXOFF) {
- /* If start/stop is set to disable, then we should disable flow control */
- if ((ch->ch_startc == __DISABLED_CHAR) || (ch->ch_stopc == __DISABLED_CHAR))
- neo_set_no_input_flow_control(ch);
- else
- neo_set_ixoff_flow_control(ch);
- }
- else
- neo_set_no_input_flow_control(ch);
- /*
- * Adjust the RX FIFO Trigger level if baud is less than 9600.
- * Not exactly elegant, but this is needed because of the Exar chip's
- * delay on firing off the RX FIFO interrupt on slower baud rates.
- */
- if (baud < 9600) {
- writeb(1, &ch->ch_neo_uart->rfifo);
- ch->ch_r_tlevel = 1;
- }
-
- neo_assert_modem_signals(ch);
-
- /* Get current status of the modem signals now */
- neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr));
- return;
-}
-
-/*
- * jsm_neo_intr()
- *
- * Neo specific interrupt handler.
- */
-static irqreturn_t neo_intr(int irq, void *voidbrd)
-{
- struct jsm_board *brd = voidbrd;
- struct jsm_channel *ch;
- int port = 0;
- int type = 0;
- int current_port;
- u32 tmp;
- u32 uart_poll;
- unsigned long lock_flags;
- unsigned long lock_flags2;
- int outofloop_count = 0;
-
- /* Lock out the slow poller from running on this board. */
- spin_lock_irqsave(&brd->bd_intr_lock, lock_flags);
-
- /*
- * Read in "extended" IRQ information from the 32bit Neo register.
- * Bits 0-7: What port triggered the interrupt.
- * Bits 8-31: Each 3bits indicate what type of interrupt occurred.
- */
- uart_poll = readl(brd->re_map_membase + UART_17158_POLL_ADDR_OFFSET);
-
- jsm_printk(INTR, INFO, &brd->pci_dev,
- "%s:%d uart_poll: %x\n", __FILE__, __LINE__, uart_poll);
-
- if (!uart_poll) {
- jsm_printk(INTR, INFO, &brd->pci_dev,
- "Kernel interrupted to me, but no pending interrupts...\n");
- spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags);
- return IRQ_NONE;
- }
-
- /* At this point, we have at least SOMETHING to service, dig further... */
-
- current_port = 0;
-
- /* Loop on each port */
- while (((uart_poll & 0xff) != 0) && (outofloop_count < 0xff)){
-
- tmp = uart_poll;
- outofloop_count++;
-
- /* Check current port to see if it has interrupt pending */
- if ((tmp & jsm_offset_table[current_port]) != 0) {
- port = current_port;
- type = tmp >> (8 + (port * 3));
- type &= 0x7;
- } else {
- current_port++;
- continue;
- }
-
- jsm_printk(INTR, INFO, &brd->pci_dev,
- "%s:%d port: %x type: %x\n", __FILE__, __LINE__, port, type);
-
- /* Remove this port + type from uart_poll */
- uart_poll &= ~(jsm_offset_table[port]);
-
- if (!type) {
- /* If no type, just ignore it, and move onto next port */
- jsm_printk(INTR, ERR, &brd->pci_dev,
- "Interrupt with no type! port: %d\n", port);
- continue;
- }
-
- /* Switch on type of interrupt we have */
- switch (type) {
-
- case UART_17158_RXRDY_TIMEOUT:
- /*
- * RXRDY Time-out is cleared by reading data in the
- * RX FIFO until it falls below the trigger level.
- */
-
- /* Verify the port is in range. */
- if (port > brd->nasync)
- continue;
-
- ch = brd->channels[port];
- neo_copy_data_from_uart_to_queue(ch);
-
- /* Call our tty layer to enforce queue flow control if needed. */
- spin_lock_irqsave(&ch->ch_lock, lock_flags2);
- jsm_check_queue_flow_control(ch);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
-
- continue;
-
- case UART_17158_RX_LINE_STATUS:
- /*
- * RXRDY and RX LINE Status (logic OR of LSR[4:1])
- */
- neo_parse_lsr(brd, port);
- continue;
-
- case UART_17158_TXRDY:
- /*
- * TXRDY interrupt clears after reading ISR register for the UART channel.
- */
-
- /*
- * Yes, this is odd...
- * Why would I check EVERY possibility of type of
- * interrupt, when we know its TXRDY???
- * Becuz for some reason, even tho we got triggered for TXRDY,
- * it seems to be occassionally wrong. Instead of TX, which
- * it should be, I was getting things like RXDY too. Weird.
- */
- neo_parse_isr(brd, port);
- continue;
-
- case UART_17158_MSR:
- /*
- * MSR or flow control was seen.
- */
- neo_parse_isr(brd, port);
- continue;
-
- default:
- /*
- * The UART triggered us with a bogus interrupt type.
- * It appears the Exar chip, when REALLY bogged down, will throw
- * these once and awhile.
- * Its harmless, just ignore it and move on.
- */
- jsm_printk(INTR, ERR, &brd->pci_dev,
- "%s:%d Unknown Interrupt type: %x\n", __FILE__, __LINE__, type);
- continue;
- }
- }
-
- spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags);
-
- jsm_printk(INTR, INFO, &brd->pci_dev, "finish.\n");
- return IRQ_HANDLED;
-}
-
-/*
- * Neo specific way of turning off the receiver.
- * Used as a way to enforce queue flow control when in
- * hardware flow control mode.
- */
-static void neo_disable_receiver(struct jsm_channel *ch)
-{
- u8 tmp = readb(&ch->ch_neo_uart->ier);
- tmp &= ~(UART_IER_RDI);
- writeb(tmp, &ch->ch_neo_uart->ier);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
-}
-
-
-/*
- * Neo specific way of turning on the receiver.
- * Used as a way to un-enforce queue flow control when in
- * hardware flow control mode.
- */
-static void neo_enable_receiver(struct jsm_channel *ch)
-{
- u8 tmp = readb(&ch->ch_neo_uart->ier);
- tmp |= (UART_IER_RDI);
- writeb(tmp, &ch->ch_neo_uart->ier);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
-}
-
-static void neo_send_start_character(struct jsm_channel *ch)
-{
- if (!ch)
- return;
-
- if (ch->ch_startc != __DISABLED_CHAR) {
- ch->ch_xon_sends++;
- writeb(ch->ch_startc, &ch->ch_neo_uart->txrx);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
- }
-}
-
-static void neo_send_stop_character(struct jsm_channel *ch)
-{
- if (!ch)
- return;
-
- if (ch->ch_stopc != __DISABLED_CHAR) {
- ch->ch_xoff_sends++;
- writeb(ch->ch_stopc, &ch->ch_neo_uart->txrx);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
- }
-}
-
-/*
- * neo_uart_init
- */
-static void neo_uart_init(struct jsm_channel *ch)
-{
- writeb(0, &ch->ch_neo_uart->ier);
- writeb(0, &ch->ch_neo_uart->efr);
- writeb(UART_EFR_ECB, &ch->ch_neo_uart->efr);
-
- /* Clear out UART and FIFO */
- readb(&ch->ch_neo_uart->txrx);
- writeb((UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR|UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr);
- readb(&ch->ch_neo_uart->lsr);
- readb(&ch->ch_neo_uart->msr);
-
- ch->ch_flags |= CH_FIFO_ENABLED;
-
- /* Assert any signals we want up */
- writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr);
-}
-
-/*
- * Make the UART completely turn off.
- */
-static void neo_uart_off(struct jsm_channel *ch)
-{
- /* Turn off UART enhanced bits */
- writeb(0, &ch->ch_neo_uart->efr);
-
- /* Stop all interrupts from occurring. */
- writeb(0, &ch->ch_neo_uart->ier);
-}
-
-static u32 neo_get_uart_bytes_left(struct jsm_channel *ch)
-{
- u8 left = 0;
- u8 lsr = readb(&ch->ch_neo_uart->lsr);
-
- /* We must cache the LSR as some of the bits get reset once read... */
- ch->ch_cached_lsr |= lsr;
-
- /* Determine whether the Transmitter is empty or not */
- if (!(lsr & UART_LSR_TEMT))
- left = 1;
- else {
- ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM);
- left = 0;
- }
-
- return left;
-}
-
-/* Channel lock MUST be held by the calling function! */
-static void neo_send_break(struct jsm_channel *ch)
-{
- /*
- * Set the time we should stop sending the break.
- * If we are already sending a break, toss away the existing
- * time to stop, and use this new value instead.
- */
-
- /* Tell the UART to start sending the break */
- if (!(ch->ch_flags & CH_BREAK_SENDING)) {
- u8 temp = readb(&ch->ch_neo_uart->lcr);
- writeb((temp | UART_LCR_SBC), &ch->ch_neo_uart->lcr);
- ch->ch_flags |= (CH_BREAK_SENDING);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
- }
-}
-
-/*
- * neo_send_immediate_char.
- *
- * Sends a specific character as soon as possible to the UART,
- * jumping over any bytes that might be in the write queue.
- *
- * The channel lock MUST be held by the calling function.
- */
-static void neo_send_immediate_char(struct jsm_channel *ch, unsigned char c)
-{
- if (!ch)
- return;
-
- writeb(c, &ch->ch_neo_uart->txrx);
-
- /* flush write operation */
- neo_pci_posting_flush(ch->ch_bd);
-}
-
-struct board_ops jsm_neo_ops = {
- .intr = neo_intr,
- .uart_init = neo_uart_init,
- .uart_off = neo_uart_off,
- .param = neo_param,
- .assert_modem_signals = neo_assert_modem_signals,
- .flush_uart_write = neo_flush_uart_write,
- .flush_uart_read = neo_flush_uart_read,
- .disable_receiver = neo_disable_receiver,
- .enable_receiver = neo_enable_receiver,
- .send_break = neo_send_break,
- .clear_break = neo_clear_break,
- .send_start_character = neo_send_start_character,
- .send_stop_character = neo_send_stop_character,
- .copy_data_from_queue_to_uart = neo_copy_data_from_queue_to_uart,
- .get_uart_bytes_left = neo_get_uart_bytes_left,
- .send_immediate_char = neo_send_immediate_char
-};
diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
deleted file mode 100644
index 7a4a914ecff0..000000000000
--- a/drivers/serial/jsm/jsm_tty.c
+++ /dev/null
@@ -1,910 +0,0 @@
-/************************************************************************
- * Copyright 2003 Digi International (www.digi.com)
- *
- * Copyright (C) 2004 IBM Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * Contact Information:
- * Scott H Kilau <Scott_Kilau@digi.com>
- * Ananda Venkatarman <mansarov@us.ibm.com>
- * Modifications:
- * 01/19/06: changed jsm_input routine to use the dynamically allocated
- * tty_buffer changes. Contributors: Scott Kilau and Ananda V.
- ***********************************************************************/
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_reg.h>
-#include <linux/delay.h> /* For udelay */
-#include <linux/pci.h>
-#include <linux/slab.h>
-
-#include "jsm.h"
-
-static DECLARE_BITMAP(linemap, MAXLINES);
-
-static void jsm_carrier(struct jsm_channel *ch);
-
-static inline int jsm_get_mstat(struct jsm_channel *ch)
-{
- unsigned char mstat;
- unsigned result;
-
- jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "start\n");
-
- mstat = (ch->ch_mostat | ch->ch_mistat);
-
- result = 0;
-
- if (mstat & UART_MCR_DTR)
- result |= TIOCM_DTR;
- if (mstat & UART_MCR_RTS)
- result |= TIOCM_RTS;
- if (mstat & UART_MSR_CTS)
- result |= TIOCM_CTS;
- if (mstat & UART_MSR_DSR)
- result |= TIOCM_DSR;
- if (mstat & UART_MSR_RI)
- result |= TIOCM_RI;
- if (mstat & UART_MSR_DCD)
- result |= TIOCM_CD;
-
- jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n");
- return result;
-}
-
-static unsigned int jsm_tty_tx_empty(struct uart_port *port)
-{
- return TIOCSER_TEMT;
-}
-
-/*
- * Return modem signals to ld.
- */
-static unsigned int jsm_tty_get_mctrl(struct uart_port *port)
-{
- int result;
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
-
- result = jsm_get_mstat(channel);
-
- if (result < 0)
- return -ENXIO;
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
-
- return result;
-}
-
-/*
- * jsm_set_modem_info()
- *
- * Set modem signals, called by ld.
- */
-static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
-
- if (mctrl & TIOCM_RTS)
- channel->ch_mostat |= UART_MCR_RTS;
- else
- channel->ch_mostat &= ~UART_MCR_RTS;
-
- if (mctrl & TIOCM_DTR)
- channel->ch_mostat |= UART_MCR_DTR;
- else
- channel->ch_mostat &= ~UART_MCR_DTR;
-
- channel->ch_bd->bd_ops->assert_modem_signals(channel);
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
- udelay(10);
-}
-
-static void jsm_tty_start_tx(struct uart_port *port)
-{
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
-
- channel->ch_flags &= ~(CH_STOP);
- jsm_tty_write(port);
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
-}
-
-static void jsm_tty_stop_tx(struct uart_port *port)
-{
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
-
- channel->ch_flags |= (CH_STOP);
-
- jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
-}
-
-static void jsm_tty_send_xchar(struct uart_port *port, char ch)
-{
- unsigned long lock_flags;
- struct jsm_channel *channel = (struct jsm_channel *)port;
- struct ktermios *termios;
-
- spin_lock_irqsave(&port->lock, lock_flags);
- termios = port->state->port.tty->termios;
- if (ch == termios->c_cc[VSTART])
- channel->ch_bd->bd_ops->send_start_character(channel);
-
- if (ch == termios->c_cc[VSTOP])
- channel->ch_bd->bd_ops->send_stop_character(channel);
- spin_unlock_irqrestore(&port->lock, lock_flags);
-}
-
-static void jsm_tty_stop_rx(struct uart_port *port)
-{
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- channel->ch_bd->bd_ops->disable_receiver(channel);
-}
-
-static void jsm_tty_enable_ms(struct uart_port *port)
-{
- /* Nothing needed */
-}
-
-static void jsm_tty_break(struct uart_port *port, int break_state)
-{
- unsigned long lock_flags;
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- spin_lock_irqsave(&port->lock, lock_flags);
- if (break_state == -1)
- channel->ch_bd->bd_ops->send_break(channel);
- else
- channel->ch_bd->bd_ops->clear_break(channel, 0);
-
- spin_unlock_irqrestore(&port->lock, lock_flags);
-}
-
-static int jsm_tty_open(struct uart_port *port)
-{
- struct jsm_board *brd;
- struct jsm_channel *channel = (struct jsm_channel *)port;
- struct ktermios *termios;
-
- /* Get board pointer from our array of majors we have allocated */
- brd = channel->ch_bd;
-
- /*
- * Allocate channel buffers for read/write/error.
- * Set flag, so we don't get trounced on.
- */
- channel->ch_flags |= (CH_OPENING);
-
- /* Drop locks, as malloc with GFP_KERNEL can sleep */
-
- if (!channel->ch_rqueue) {
- channel->ch_rqueue = kzalloc(RQUEUESIZE, GFP_KERNEL);
- if (!channel->ch_rqueue) {
- jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev,
- "unable to allocate read queue buf");
- return -ENOMEM;
- }
- }
- if (!channel->ch_equeue) {
- channel->ch_equeue = kzalloc(EQUEUESIZE, GFP_KERNEL);
- if (!channel->ch_equeue) {
- jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev,
- "unable to allocate error queue buf");
- return -ENOMEM;
- }
- }
- if (!channel->ch_wqueue) {
- channel->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL);
- if (!channel->ch_wqueue) {
- jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev,
- "unable to allocate write queue buf");
- return -ENOMEM;
- }
- }
-
- channel->ch_flags &= ~(CH_OPENING);
- /*
- * Initialize if neither terminal is open.
- */
- jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev,
- "jsm_open: initializing channel in open...\n");
-
- /*
- * Flush input queues.
- */
- channel->ch_r_head = channel->ch_r_tail = 0;
- channel->ch_e_head = channel->ch_e_tail = 0;
- channel->ch_w_head = channel->ch_w_tail = 0;
-
- brd->bd_ops->flush_uart_write(channel);
- brd->bd_ops->flush_uart_read(channel);
-
- channel->ch_flags = 0;
- channel->ch_cached_lsr = 0;
- channel->ch_stops_sent = 0;
-
- termios = port->state->port.tty->termios;
- channel->ch_c_cflag = termios->c_cflag;
- channel->ch_c_iflag = termios->c_iflag;
- channel->ch_c_oflag = termios->c_oflag;
- channel->ch_c_lflag = termios->c_lflag;
- channel->ch_startc = termios->c_cc[VSTART];
- channel->ch_stopc = termios->c_cc[VSTOP];
-
- /* Tell UART to init itself */
- brd->bd_ops->uart_init(channel);
-
- /*
- * Run param in case we changed anything
- */
- brd->bd_ops->param(channel);
-
- jsm_carrier(channel);
-
- channel->ch_open_count++;
-
- jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev, "finish\n");
- return 0;
-}
-
-static void jsm_tty_close(struct uart_port *port)
-{
- struct jsm_board *bd;
- struct ktermios *ts;
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "start\n");
-
- bd = channel->ch_bd;
- ts = port->state->port.tty->termios;
-
- channel->ch_flags &= ~(CH_STOPI);
-
- channel->ch_open_count--;
-
- /*
- * If we have HUPCL set, lower DTR and RTS
- */
- if (channel->ch_c_cflag & HUPCL) {
- jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev,
- "Close. HUPCL set, dropping DTR/RTS\n");
-
- /* Drop RTS/DTR */
- channel->ch_mostat &= ~(UART_MCR_DTR | UART_MCR_RTS);
- bd->bd_ops->assert_modem_signals(channel);
- }
-
- /* Turn off UART interrupts for this port */
- channel->ch_bd->bd_ops->uart_off(channel);
-
- jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "finish\n");
-}
-
-static void jsm_tty_set_termios(struct uart_port *port,
- struct ktermios *termios,
- struct ktermios *old_termios)
-{
- unsigned long lock_flags;
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- spin_lock_irqsave(&port->lock, lock_flags);
- channel->ch_c_cflag = termios->c_cflag;
- channel->ch_c_iflag = termios->c_iflag;
- channel->ch_c_oflag = termios->c_oflag;
- channel->ch_c_lflag = termios->c_lflag;
- channel->ch_startc = termios->c_cc[VSTART];
- channel->ch_stopc = termios->c_cc[VSTOP];
-
- channel->ch_bd->bd_ops->param(channel);
- jsm_carrier(channel);
- spin_unlock_irqrestore(&port->lock, lock_flags);
-}
-
-static const char *jsm_tty_type(struct uart_port *port)
-{
- return "jsm";
-}
-
-static void jsm_tty_release_port(struct uart_port *port)
-{
-}
-
-static int jsm_tty_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void jsm_config_port(struct uart_port *port, int flags)
-{
- port->type = PORT_JSM;
-}
-
-static struct uart_ops jsm_ops = {
- .tx_empty = jsm_tty_tx_empty,
- .set_mctrl = jsm_tty_set_mctrl,
- .get_mctrl = jsm_tty_get_mctrl,
- .stop_tx = jsm_tty_stop_tx,
- .start_tx = jsm_tty_start_tx,
- .send_xchar = jsm_tty_send_xchar,
- .stop_rx = jsm_tty_stop_rx,
- .enable_ms = jsm_tty_enable_ms,
- .break_ctl = jsm_tty_break,
- .startup = jsm_tty_open,
- .shutdown = jsm_tty_close,
- .set_termios = jsm_tty_set_termios,
- .type = jsm_tty_type,
- .release_port = jsm_tty_release_port,
- .request_port = jsm_tty_request_port,
- .config_port = jsm_config_port,
-};
-
-/*
- * jsm_tty_init()
- *
- * Init the tty subsystem. Called once per board after board has been
- * downloaded and init'ed.
- */
-int __devinit jsm_tty_init(struct jsm_board *brd)
-{
- int i;
- void __iomem *vaddr;
- struct jsm_channel *ch;
-
- if (!brd)
- return -ENXIO;
-
- jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
-
- /*
- * Initialize board structure elements.
- */
-
- brd->nasync = brd->maxports;
-
- /*
- * Allocate channel memory that might not have been allocated
- * when the driver was first loaded.
- */
- for (i = 0; i < brd->nasync; i++) {
- if (!brd->channels[i]) {
-
- /*
- * Okay to malloc with GFP_KERNEL, we are not at
- * interrupt context, and there are no locks held.
- */
- brd->channels[i] = kzalloc(sizeof(struct jsm_channel), GFP_KERNEL);
- if (!brd->channels[i]) {
- jsm_printk(CORE, ERR, &brd->pci_dev,
- "%s:%d Unable to allocate memory for channel struct\n",
- __FILE__, __LINE__);
- }
- }
- }
-
- ch = brd->channels[0];
- vaddr = brd->re_map_membase;
-
- /* Set up channel variables */
- for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) {
-
- if (!brd->channels[i])
- continue;
-
- spin_lock_init(&ch->ch_lock);
-
- if (brd->bd_uart_offset == 0x200)
- ch->ch_neo_uart = vaddr + (brd->bd_uart_offset * i);
-
- ch->ch_bd = brd;
- ch->ch_portnum = i;
-
- /* .25 second delay */
- ch->ch_close_delay = 250;
-
- init_waitqueue_head(&ch->ch_flags_wait);
- }
-
- jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n");
- return 0;
-}
-
-int jsm_uart_port_init(struct jsm_board *brd)
-{
- int i, rc;
- unsigned int line;
- struct jsm_channel *ch;
-
- if (!brd)
- return -ENXIO;
-
- jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
-
- /*
- * Initialize board structure elements.
- */
-
- brd->nasync = brd->maxports;
-
- /* Set up channel variables */
- for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) {
-
- if (!brd->channels[i])
- continue;
-
- brd->channels[i]->uart_port.irq = brd->irq;
- brd->channels[i]->uart_port.uartclk = 14745600;
- brd->channels[i]->uart_port.type = PORT_JSM;
- brd->channels[i]->uart_port.iotype = UPIO_MEM;
- brd->channels[i]->uart_port.membase = brd->re_map_membase;
- brd->channels[i]->uart_port.fifosize = 16;
- brd->channels[i]->uart_port.ops = &jsm_ops;
- line = find_first_zero_bit(linemap, MAXLINES);
- if (line >= MAXLINES) {
- printk(KERN_INFO "jsm: linemap is full, added device failed\n");
- continue;
- } else
- set_bit(line, linemap);
- brd->channels[i]->uart_port.line = line;
- rc = uart_add_one_port (&jsm_uart_driver, &brd->channels[i]->uart_port);
- if (rc){
- printk(KERN_INFO "jsm: Port %d failed. Aborting...\n", i);
- return rc;
- }
- else
- printk(KERN_INFO "jsm: Port %d added\n", i);
- }
-
- jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n");
- return 0;
-}
-
-int jsm_remove_uart_port(struct jsm_board *brd)
-{
- int i;
- struct jsm_channel *ch;
-
- if (!brd)
- return -ENXIO;
-
- jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
-
- /*
- * Initialize board structure elements.
- */
-
- brd->nasync = brd->maxports;
-
- /* Set up channel variables */
- for (i = 0; i < brd->nasync; i++) {
-
- if (!brd->channels[i])
- continue;
-
- ch = brd->channels[i];
-
- clear_bit(ch->uart_port.line, linemap);
- uart_remove_one_port(&jsm_uart_driver, &brd->channels[i]->uart_port);
- }
-
- jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n");
- return 0;
-}
-
-void jsm_input(struct jsm_channel *ch)
-{
- struct jsm_board *bd;
- struct tty_struct *tp;
- u32 rmask;
- u16 head;
- u16 tail;
- int data_len;
- unsigned long lock_flags;
- int len = 0;
- int n = 0;
- int s = 0;
- int i = 0;
-
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n");
-
- if (!ch)
- return;
-
- tp = ch->uart_port.state->port.tty;
-
- bd = ch->ch_bd;
- if(!bd)
- return;
-
- spin_lock_irqsave(&ch->ch_lock, lock_flags);
-
- /*
- *Figure the number of characters in the buffer.
- *Exit immediately if none.
- */
-
- rmask = RQUEUEMASK;
-
- head = ch->ch_r_head & rmask;
- tail = ch->ch_r_tail & rmask;
-
- data_len = (head - tail) & rmask;
- if (data_len == 0) {
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- return;
- }
-
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n");
-
- /*
- *If the device is not open, or CREAD is off, flush
- *input data and return immediately.
- */
- if (!tp ||
- !(tp->termios->c_cflag & CREAD) ) {
-
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum);
- ch->ch_r_head = tail;
-
- /* Force queue flow control to be released, if needed */
- jsm_check_queue_flow_control(ch);
-
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- return;
- }
-
- /*
- * If we are throttled, simply don't read any data.
- */
- if (ch->ch_flags & CH_STOPI) {
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "Port %d throttled, not reading any data. head: %x tail: %x\n",
- ch->ch_portnum, head, tail);
- return;
- }
-
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start 2\n");
-
- if (data_len <= 0) {
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "jsm_input 1\n");
- return;
- }
-
- len = tty_buffer_request_room(tp, data_len);
- n = len;
-
- /*
- * n now contains the most amount of data we can copy,
- * bounded either by the flip buffer size or the amount
- * of data the card actually has pending...
- */
- while (n) {
- s = ((head >= tail) ? head : RQUEUESIZE) - tail;
- s = min(s, n);
-
- if (s <= 0)
- break;
-
- /*
- * If conditions are such that ld needs to see all
- * UART errors, we will have to walk each character
- * and error byte and send them to the buffer one at
- * a time.
- */
-
- if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) {
- for (i = 0; i < s; i++) {
- /*
- * Give the Linux ld the flags in the
- * format it likes.
- */
- if (*(ch->ch_equeue +tail +i) & UART_LSR_BI)
- tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_BREAK);
- else if (*(ch->ch_equeue +tail +i) & UART_LSR_PE)
- tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_PARITY);
- else if (*(ch->ch_equeue +tail +i) & UART_LSR_FE)
- tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_FRAME);
- else
- tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_NORMAL);
- }
- } else {
- tty_insert_flip_string(tp, ch->ch_rqueue + tail, s) ;
- }
- tail += s;
- n -= s;
- /* Flip queue if needed */
- tail &= rmask;
- }
-
- ch->ch_r_tail = tail & rmask;
- ch->ch_e_tail = tail & rmask;
- jsm_check_queue_flow_control(ch);
- spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
-
- /* Tell the tty layer its okay to "eat" the data now */
- tty_flip_buffer_push(tp);
-
- jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n");
-}
-
-static void jsm_carrier(struct jsm_channel *ch)
-{
- struct jsm_board *bd;
-
- int virt_carrier = 0;
- int phys_carrier = 0;
-
- jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, "start\n");
- if (!ch)
- return;
-
- bd = ch->ch_bd;
-
- if (!bd)
- return;
-
- if (ch->ch_mistat & UART_MSR_DCD) {
- jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
- "mistat: %x D_CD: %x\n", ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD);
- phys_carrier = 1;
- }
-
- if (ch->ch_c_cflag & CLOCAL)
- virt_carrier = 1;
-
- jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
- "DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier);
-
- /*
- * Test for a VIRTUAL carrier transition to HIGH.
- */
- if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) {
-
- /*
- * When carrier rises, wake any threads waiting
- * for carrier in the open routine.
- */
-
- jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
- "carrier: virt DCD rose\n");
-
- if (waitqueue_active(&(ch->ch_flags_wait)))
- wake_up_interruptible(&ch->ch_flags_wait);
- }
-
- /*
- * Test for a PHYSICAL carrier transition to HIGH.
- */
- if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) {
-
- /*
- * When carrier rises, wake any threads waiting
- * for carrier in the open routine.
- */
-
- jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
- "carrier: physical DCD rose\n");
-
- if (waitqueue_active(&(ch->ch_flags_wait)))
- wake_up_interruptible(&ch->ch_flags_wait);
- }
-
- /*
- * Test for a PHYSICAL transition to low, so long as we aren't
- * currently ignoring physical transitions (which is what "virtual
- * carrier" indicates).
- *
- * The transition of the virtual carrier to low really doesn't
- * matter... it really only means "ignore carrier state", not
- * "make pretend that carrier is there".
- */
- if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0)
- && (phys_carrier == 0)) {
- /*
- * When carrier drops:
- *
- * Drop carrier on all open units.
- *
- * Flush queues, waking up any task waiting in the
- * line discipline.
- *
- * Send a hangup to the control terminal.
- *
- * Enable all select calls.
- */
- if (waitqueue_active(&(ch->ch_flags_wait)))
- wake_up_interruptible(&ch->ch_flags_wait);
- }
-
- /*
- * Make sure that our cached values reflect the current reality.
- */
- if (virt_carrier == 1)
- ch->ch_flags |= CH_FCAR;
- else
- ch->ch_flags &= ~CH_FCAR;
-
- if (phys_carrier == 1)
- ch->ch_flags |= CH_CD;
- else
- ch->ch_flags &= ~CH_CD;
-}
-
-
-void jsm_check_queue_flow_control(struct jsm_channel *ch)
-{
- struct board_ops *bd_ops = ch->ch_bd->bd_ops;
- int qleft;
-
- /* Store how much space we have left in the queue */
- if ((qleft = ch->ch_r_tail - ch->ch_r_head - 1) < 0)
- qleft += RQUEUEMASK + 1;
-
- /*
- * Check to see if we should enforce flow control on our queue because
- * the ld (or user) isn't reading data out of our queue fast enuf.
- *
- * NOTE: This is done based on what the current flow control of the
- * port is set for.
- *
- * 1) HWFLOW (RTS) - Turn off the UART's Receive interrupt.
- * This will cause the UART's FIFO to back up, and force
- * the RTS signal to be dropped.
- * 2) SWFLOW (IXOFF) - Keep trying to send a stop character to
- * the other side, in hopes it will stop sending data to us.
- * 3) NONE - Nothing we can do. We will simply drop any extra data
- * that gets sent into us when the queue fills up.
- */
- if (qleft < 256) {
- /* HWFLOW */
- if (ch->ch_c_cflag & CRTSCTS) {
- if(!(ch->ch_flags & CH_RECEIVER_OFF)) {
- bd_ops->disable_receiver(ch);
- ch->ch_flags |= (CH_RECEIVER_OFF);
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "Internal queue hit hilevel mark (%d)! Turning off interrupts.\n",
- qleft);
- }
- }
- /* SWFLOW */
- else if (ch->ch_c_iflag & IXOFF) {
- if (ch->ch_stops_sent <= MAX_STOPS_SENT) {
- bd_ops->send_stop_character(ch);
- ch->ch_stops_sent++;
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "Sending stop char! Times sent: %x\n", ch->ch_stops_sent);
- }
- }
- }
-
- /*
- * Check to see if we should unenforce flow control because
- * ld (or user) finally read enuf data out of our queue.
- *
- * NOTE: This is done based on what the current flow control of the
- * port is set for.
- *
- * 1) HWFLOW (RTS) - Turn back on the UART's Receive interrupt.
- * This will cause the UART's FIFO to raise RTS back up,
- * which will allow the other side to start sending data again.
- * 2) SWFLOW (IXOFF) - Send a start character to
- * the other side, so it will start sending data to us again.
- * 3) NONE - Do nothing. Since we didn't do anything to turn off the
- * other side, we don't need to do anything now.
- */
- if (qleft > (RQUEUESIZE / 2)) {
- /* HWFLOW */
- if (ch->ch_c_cflag & CRTSCTS) {
- if (ch->ch_flags & CH_RECEIVER_OFF) {
- bd_ops->enable_receiver(ch);
- ch->ch_flags &= ~(CH_RECEIVER_OFF);
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
- "Internal queue hit lowlevel mark (%d)! Turning on interrupts.\n",
- qleft);
- }
- }
- /* SWFLOW */
- else if (ch->ch_c_iflag & IXOFF && ch->ch_stops_sent) {
- ch->ch_stops_sent = 0;
- bd_ops->send_start_character(ch);
- jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "Sending start char!\n");
- }
- }
-}
-
-/*
- * jsm_tty_write()
- *
- * Take data from the user or kernel and send it out to the FEP.
- * In here exists all the Transparent Print magic as well.
- */
-int jsm_tty_write(struct uart_port *port)
-{
- int bufcount;
- int data_count = 0,data_count1 =0;
- u16 head;
- u16 tail;
- u16 tmask;
- u32 remain;
- int temp_tail = port->state->xmit.tail;
- struct jsm_channel *channel = (struct jsm_channel *)port;
-
- tmask = WQUEUEMASK;
- head = (channel->ch_w_head) & tmask;
- tail = (channel->ch_w_tail) & tmask;
-
- if ((bufcount = tail - head - 1) < 0)
- bufcount += WQUEUESIZE;
-
- bufcount = min(bufcount, 56);
- remain = WQUEUESIZE - head;
-
- data_count = 0;
- if (bufcount >= remain) {
- bufcount -= remain;
- while ((port->state->xmit.head != temp_tail) &&
- (data_count < remain)) {
- channel->ch_wqueue[head++] =
- port->state->xmit.buf[temp_tail];
-
- temp_tail++;
- temp_tail &= (UART_XMIT_SIZE - 1);
- data_count++;
- }
- if (data_count == remain) head = 0;
- }
-
- data_count1 = 0;
- if (bufcount > 0) {
- remain = bufcount;
- while ((port->state->xmit.head != temp_tail) &&
- (data_count1 < remain)) {
- channel->ch_wqueue[head++] =
- port->state->xmit.buf[temp_tail];
-
- temp_tail++;
- temp_tail &= (UART_XMIT_SIZE - 1);
- data_count1++;
-
- }
- }
-
- port->state->xmit.tail = temp_tail;
-
- data_count += data_count1;
- if (data_count) {
- head &= tmask;
- channel->ch_w_head = head;
- }
-
- if (data_count) {
- channel->ch_bd->bd_ops->copy_data_from_queue_to_uart(channel);
- }
-
- return data_count;
-}