diff options
Diffstat (limited to 'drivers/staging/dgap/dgap_fep5.c')
| -rw-r--r-- | drivers/staging/dgap/dgap_fep5.c | 1938 |
1 files changed, 0 insertions, 1938 deletions
diff --git a/drivers/staging/dgap/dgap_fep5.c b/drivers/staging/dgap/dgap_fep5.c deleted file mode 100644 index f75831a422e8..000000000000 --- a/drivers/staging/dgap/dgap_fep5.c +++ /dev/null @@ -1,1938 +0,0 @@ -/* - * Copyright 2003 Digi International (www.digi.com) - * Scott H Kilau <Scott_Kilau at digi dot com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! - * - * This is shared code between Digi's CVS archive and the - * Linux Kernel sources. - * Changing the source just for reformatting needlessly breaks - * our CVS diff history. - * - * Send any bug fixes/changes to: Eng.Linux at digi dot com. - * Thank you. - * - * $Id: dgap_fep5.c,v 1.2 2011/06/21 10:35:40 markh Exp $ - */ - - -#include <linux/kernel.h> -#include <linux/version.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/delay.h> /* For udelay */ -#include <asm/uaccess.h> /* For copy_from_user/copy_to_user */ -#include <linux/tty.h> -#include <linux/tty_flip.h> /* For tty_schedule_flip */ -#include <linux/slab.h> - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) -#include <linux/sched.h> -#endif - -#include "dgap_driver.h" -#include "dgap_pci.h" -#include "dgap_fep5.h" -#include "dgap_tty.h" -#include "dgap_conf.h" -#include "dgap_parse.h" -#include "dgap_trace.h" - -/* - * Our function prototypes - */ -static void dgap_cmdw_ext(struct channel_t *ch, u16 cmd, u16 word, uint ncmds); -static int dgap_event(struct board_t *bd); - -/* - * internal variables - */ -static uint dgap_count = 500; - - -/* - * Loads the dgap.conf config file from the user. - */ -void dgap_do_config_load(uchar __user *uaddr, int len) -{ - int orig_len = len; - char *to_addr; - uchar __user *from_addr = uaddr; - char buf[U2BSIZE]; - int n; - - to_addr = dgap_config_buf = kzalloc(len + 1, GFP_ATOMIC); - if (!dgap_config_buf) { - DPR_INIT(("dgap_do_config_load - unable to allocate memory for file\n")); - dgap_driver_state = DRIVER_NEED_CONFIG_LOAD; - return; - } - - n = U2BSIZE; - while (len) { - - if (n > len) - n = len; - - if (copy_from_user((char *) &buf, from_addr, n) == -1 ) - return; - - /* Copy data from buffer to kernel memory */ - memcpy(to_addr, buf, n); - - /* increment counts */ - len -= n; - to_addr += n; - from_addr += n; - n = U2BSIZE; - } - - dgap_config_buf[orig_len] = '\0'; - - to_addr = dgap_config_buf; - dgap_parsefile(&to_addr, TRUE); - - DPR_INIT(("dgap_config_load() finish\n")); - - return; -} - - -int dgap_after_config_loaded(void) -{ - int i = 0; - int rc = 0; - - /* - * Register our ttys, now that we have the config loaded. - */ - for (i = 0; i < dgap_NumBoards; ++i) { - - /* - * Initialize KME waitqueues... - */ - init_waitqueue_head(&(dgap_Board[i]->kme_wait)); - - /* - * allocate flip buffer for board. - */ - dgap_Board[i]->flipbuf = kzalloc(MYFLIPLEN, GFP_ATOMIC); - dgap_Board[i]->flipflagbuf = kzalloc(MYFLIPLEN, GFP_ATOMIC); - } - - return rc; -} - - - -/*======================================================================= - * - * usertoboard - copy from user space to board space. - * - *=======================================================================*/ -static int dgap_usertoboard(struct board_t *brd, char *to_addr, char __user *from_addr, int len) -{ - char buf[U2BSIZE]; - int n = U2BSIZE; - - if (!brd || brd->magic != DGAP_BOARD_MAGIC) - return -EFAULT; - - while (len) { - if (n > len) - n = len; - - if (copy_from_user((char *) &buf, from_addr, n) == -1 ) { - return -EFAULT; - } - - /* Copy data from buffer to card memory */ - memcpy_toio(to_addr, buf, n); - - /* increment counts */ - len -= n; - to_addr += n; - from_addr += n; - n = U2BSIZE; - } - return 0; -} - - -/* - * Copies the BIOS code from the user to the board, - * and starts the BIOS running. - */ -void dgap_do_bios_load(struct board_t *brd, uchar __user *ubios, int len) -{ - uchar *addr; - uint offset; - int i; - - if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase) - return; - - DPR_INIT(("dgap_do_bios_load() start\n")); - - addr = brd->re_map_membase; - - /* - * clear POST area - */ - for (i = 0; i < 16; i++) - writeb(0, addr + POSTAREA + i); - - /* - * Download bios - */ - offset = 0x1000; - if (dgap_usertoboard(brd, addr + offset, ubios, len) == -1 ) { - brd->state = BOARD_FAILED; - brd->dpastatus = BD_NOFEP; - return; - } - - writel(0x0bf00401, addr); - writel(0, (addr + 4)); - - /* Clear the reset, and change states. */ - writeb(FEPCLR, brd->re_map_port); - brd->state = WAIT_BIOS_LOAD; -} - - -/* - * Checks to see if the BIOS completed running on the card. - */ -static void dgap_do_wait_for_bios(struct board_t *brd) -{ - uchar *addr; - u16 word; - - if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase) - return; - - addr = brd->re_map_membase; - word = readw(addr + POSTAREA); - - /* Check to see if BIOS thinks board is good. (GD). */ - if (word == *(u16 *) "GD") { - DPR_INIT(("GOT GD in memory, moving states.\n")); - brd->state = FINISHED_BIOS_LOAD; - return; - } - - /* Give up on board after too long of time taken */ - if (brd->wait_for_bios++ > 5000) { - u16 err1 = readw(addr + SEQUENCE); - u16 err2 = readw(addr + ERROR); - APR(("***WARNING*** %s failed diagnostics. Error #(%x,%x).\n", - brd->name, err1, err2)); - brd->state = BOARD_FAILED; - brd->dpastatus = BD_NOFEP; - } -} - - -/* - * Copies the FEP code from the user to the board, - * and starts the FEP running. - */ -void dgap_do_fep_load(struct board_t *brd, uchar __user *ufep, int len) -{ - uchar *addr; - uint offset; - - if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase) - return; - - addr = brd->re_map_membase; - - DPR_INIT(("dgap_do_fep_load() for board %s : start\n", brd->name)); - - /* - * Download FEP - */ - offset = 0x1000; - if (dgap_usertoboard(brd, addr + offset, ufep, len) == -1 ) { - brd->state = BOARD_FAILED; - brd->dpastatus = BD_NOFEP; - return; - } - - /* - * If board is a concentrator product, we need to give - * it its config string describing how the concentrators look. - */ - if ((brd->type == PCX) || (brd->type == PEPC)) { - uchar string[100]; - uchar *config, *xconfig; - int i = 0; - - xconfig = dgap_create_config_string(brd, string); - - /* Write string to board memory */ - config = addr + CONFIG; - for (; i < CONFIGSIZE; i++, config++, xconfig++) { - writeb(*xconfig, config); - if ((*xconfig & 0xff) == 0xff) - break; - } - } - - writel(0xbfc01004, (addr + 0xc34)); - writel(0x3, (addr + 0xc30)); - - /* change states. */ - brd->state = WAIT_FEP_LOAD; - - DPR_INIT(("dgap_do_fep_load() for board %s : finish\n", brd->name)); - -} - - -/* - * Waits for the FEP to report thats its ready for us to use. - */ -static void dgap_do_wait_for_fep(struct board_t *brd) -{ - uchar *addr; - u16 word; - - if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase) - return; - - addr = brd->re_map_membase; - - DPR_INIT(("dgap_do_wait_for_fep() for board %s : start. addr: %p\n", brd->name, addr)); - - word = readw(addr + FEPSTAT); - - /* Check to see if FEP is up and running now. */ - if (word == *(u16 *) "OS") { - DPR_INIT(("GOT OS in memory for board %s, moving states.\n", brd->name)); - brd->state = FINISHED_FEP_LOAD; - - /* - * Check to see if the board can support FEP5+ commands. - */ - word = readw(addr + FEP5_PLUS); - if (word == *(u16 *) "5A") { - DPR_INIT(("GOT 5A in memory for board %s, board supports extended FEP5 commands.\n", brd->name)); - brd->bd_flags |= BD_FEP5PLUS; - } - - return; - } - - /* Give up on board after too long of time taken */ - if (brd->wait_for_fep++ > 5000) { - u16 err1 = readw(addr + SEQUENCE); - u16 err2 = readw(addr + ERROR); - APR(("***WARNING*** FEPOS for %s not functioning. Error #(%x,%x).\n", - brd->name, err1, err2)); - brd->state = BOARD_FAILED; - brd->dpastatus = BD_NOFEP; - } - - DPR_INIT(("dgap_do_wait_for_fep() for board %s : finish\n", brd->name)); -} - - -/* - * Physically forces the FEP5 card to reset itself. - */ -static void dgap_do_reset_board(struct board_t *brd) -{ - uchar check; - u32 check1; - u32 check2; - int i = 0; - - if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase || !brd->re_map_port) { - DPR_INIT(("dgap_do_reset_board() start. bad values. brd: %p mem: %p io: %p\n", - brd, brd ? brd->re_map_membase : 0, brd ? brd->re_map_port : 0)); - return; - } - - DPR_INIT(("dgap_do_reset_board() start. io: %p\n", brd->re_map_port)); - - /* FEPRST does not vary among supported boards */ - writeb(FEPRST, brd->re_map_port); - - for (i = 0; i <= 1000; i++) { - check = readb(brd->re_map_port) & 0xe; - if (check == FEPRST) - break; - udelay(10); - - } - if (i > 1000) { - APR(("*** WARNING *** Board not resetting... Failing board.\n")); - brd->state = BOARD_FAILED; - brd->dpastatus = BD_NOFEP; - goto failed; - } - - /* - * Make sure there really is memory out there. - */ - writel(0xa55a3cc3, (brd->re_map_membase + LOWMEM)); - writel(0x5aa5c33c, (brd->re_map_membase + HIGHMEM)); - check1 = readl(brd->re_map_membase + LOWMEM); - check2 = readl(brd->re_map_membase + HIGHMEM); - - if ((check1 != 0xa55a3cc3) || (check2 != 0x5aa5c33c)) { - APR(("*** Warning *** No memory at %p for board.\n", brd->re_map_membase)); - brd->state = BOARD_FAILED; - brd->dpastatus = BD_NOFEP; - goto failed; - } - - if (brd->state != BOARD_FAILED) - brd->state = FINISHED_RESET; - -failed: - DPR_INIT(("dgap_do_reset_board() finish\n")); -} - - -/* - * Sends a concentrator image into the FEP5 board. - */ -void dgap_do_conc_load(struct board_t *brd, uchar *uaddr, int len) -{ - char *vaddr; - u16 offset = 0; - struct downld_t *to_dp; - - if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase) - return; - - vaddr = brd->re_map_membase; - - offset = readw((u16 *) (vaddr + DOWNREQ)); - to_dp = (struct downld_t *) (vaddr + (int) offset); - - /* - * The image was already read into kernel space, - * we do NOT need a user space read here - */ - memcpy_toio((char *) to_dp, uaddr, sizeof(struct downld_t)); - - /* Tell card we have data for it */ - writew(0, vaddr + (DOWNREQ)); - - brd->conc_dl_status = NO_PENDING_CONCENTRATOR_REQUESTS; -} - - -#define EXPANSION_ROM_SIZE (64 * 1024) -#define FEP5_ROM_MAGIC (0xFEFFFFFF) - -static void dgap_get_vpd(struct board_t *brd) -{ - u32 magic; - u32 base_offset; - u16 rom_offset; - u16 vpd_offset; - u16 image_length; - u16 i; - uchar byte1; - uchar byte2; - - /* - * Poke the magic number at the PCI Rom Address location. - * If VPD is supported, the value read from that address - * will be non-zero. - */ - magic = FEP5_ROM_MAGIC; - pci_write_config_dword(brd->pdev, PCI_ROM_ADDRESS, magic); - pci_read_config_dword(brd->pdev, PCI_ROM_ADDRESS, &magic); - - /* VPD not supported, bail */ - if (!magic) - return; - - /* - * To get to the OTPROM memory, we have to send the boards base - * address or'ed with 1 into the PCI Rom Address location. - */ - magic = brd->membase | 0x01; - pci_write_config_dword(brd->pdev, PCI_ROM_ADDRESS, magic); - pci_read_config_dword(brd->pdev, PCI_ROM_ADDRESS, &magic); - - byte1 = readb(brd->re_map_membase); - byte2 = readb(brd->re_map_membase + 1); - - /* - * If the board correctly swapped to the OTPROM memory, - * the first 2 bytes (header) should be 0x55, 0xAA - */ - if (byte1 == 0x55 && byte2 == 0xAA) { - - base_offset = 0; - - /* - * We have to run through all the OTPROM memory looking - * for the VPD offset. - */ - while (base_offset <= EXPANSION_ROM_SIZE) { - - /* - * Lots of magic numbers here. - * - * The VPD offset is located inside the ROM Data Structure. - * We also have to remember the length of each - * ROM Data Structure, so we can "hop" to the next - * entry if the VPD isn't in the current - * ROM Data Structure. - */ - rom_offset = readw(brd->re_map_membase + base_offset + 0x18); - image_length = readw(brd->re_map_membase + rom_offset + 0x10) * 512; - vpd_offset = readw(brd->re_map_membase + rom_offset + 0x08); - - /* Found the VPD entry */ - if (vpd_offset) - break; - - /* We didn't find a VPD entry, go to next ROM entry. */ - base_offset += image_length; - - byte1 = readb(brd->re_map_membase + base_offset); - byte2 = readb(brd->re_map_membase + base_offset + 1); - - /* - * If the new ROM offset doesn't have 0x55, 0xAA - * as its header, we have run out of ROM. - */ - if (byte1 != 0x55 || byte2 != 0xAA) - break; - } - - /* - * If we have a VPD offset, then mark the board - * as having a valid VPD, and copy VPDSIZE (512) bytes of - * that VPD to the buffer we have in our board structure. - */ - if (vpd_offset) { - brd->bd_flags |= BD_HAS_VPD; - for (i = 0; i < VPDSIZE; i++) - brd->vpd[i] = readb(brd->re_map_membase + vpd_offset + i); - } - } - - /* - * We MUST poke the magic number at the PCI Rom Address location again. - * This makes the card report the regular board memory back to us, - * rather than the OTPROM memory. - */ - magic = FEP5_ROM_MAGIC; - pci_write_config_dword(brd->pdev, PCI_ROM_ADDRESS, magic); -} - - -/* - * Our board poller function. - */ -void dgap_poll_tasklet(unsigned long data) -{ - struct board_t *bd = (struct board_t *) data; - ulong lock_flags; - ulong lock_flags2; - char *vaddr; - u16 head, tail; - u16 *chk_addr; - u16 check = 0; - - if (!bd || (bd->magic != DGAP_BOARD_MAGIC)) { - APR(("dgap_poll_tasklet() - NULL or bad bd.\n")); - return; - } - - if (bd->inhibit_poller) - return; - - DGAP_LOCK(bd->bd_lock, lock_flags); - - vaddr = bd->re_map_membase; - - /* - * If board is ready, parse deeper to see if there is anything to do. - */ - if (bd->state == BOARD_READY) { - - struct ev_t *eaddr = NULL; - - if (!bd->re_map_membase) { - DGAP_UNLOCK(bd->bd_lock, lock_flags); - return; - } - if (!bd->re_map_port) { - DGAP_UNLOCK(bd->bd_lock, lock_flags); - return; - } - - if (!bd->nasync) { - goto out; - } - - /* - * If this is a CX or EPCX, we need to see if the firmware - * is requesting a concentrator image from us. - */ - if ((bd->type == PCX) || (bd->type == PEPC)) { - chk_addr = (u16 *) (vaddr + DOWNREQ); - check = readw(chk_addr); - /* Nonzero if FEP is requesting concentrator image. */ - if (check) { - if (bd->conc_dl_status == NO_PENDING_CONCENTRATOR_REQUESTS) - bd->conc_dl_status = NEED_CONCENTRATOR; - /* - * Signal downloader, its got some work to do. - */ - DGAP_LOCK(dgap_dl_lock, lock_flags2); - if (dgap_dl_action != 1) { - dgap_dl_action = 1; - wake_up_interruptible(&dgap_dl_wait); - } - DGAP_UNLOCK(dgap_dl_lock, lock_flags2); - - } - } - - eaddr = (struct ev_t *) (vaddr + EVBUF); - - /* Get our head and tail */ - head = readw(&(eaddr->ev_head)); - tail = readw(&(eaddr->ev_tail)); - - /* - * If there is an event pending. Go service it. - */ - if (head != tail) { - DGAP_UNLOCK(bd->bd_lock, lock_flags); - dgap_event(bd); - DGAP_LOCK(bd->bd_lock, lock_flags); - } - -out: - /* - * If board is doing interrupts, ACK the interrupt. - */ - if (bd && bd->intr_running) { - readb(bd->re_map_port + 2); - } - - DGAP_UNLOCK(bd->bd_lock, lock_flags); - return; - } - - /* Our state machine to get the board up and running */ - - /* Reset board */ - if (bd->state == NEED_RESET) { - - /* Get VPD info */ - dgap_get_vpd(bd); - - dgap_do_reset_board(bd); - } - - /* Move to next state */ - if (bd->state == FINISHED_RESET) { - bd->state = NEED_CONFIG; - } - - if (bd->state == NEED_CONFIG) { - /* - * Match this board to a config the user created for us. - */ - bd->bd_config = dgap_find_config(bd->type, bd->pci_bus, bd->pci_slot); - - /* - * Because the 4 port Xr products share the same PCI ID - * as the 8 port Xr products, if we receive a NULL config - * back, and this is a PAPORT8 board, retry with a - * PAPORT4 attempt as well. - */ - if (bd->type == PAPORT8 && !bd->bd_config) { - bd->bd_config = dgap_find_config(PAPORT4, bd->pci_bus, bd->pci_slot); - } - - /* - * Register the ttys (if any) into the kernel. - */ - if (bd->bd_config) { - bd->state = FINISHED_CONFIG; - } - else { - bd->state = CONFIG_NOT_FOUND; - } - } - - /* Move to next state */ - if (bd->state == FINISHED_CONFIG) { - bd->state = NEED_DEVICE_CREATION; - } - - /* Move to next state */ - if (bd->state == NEED_DEVICE_CREATION) { - /* - * Signal downloader, its got some work to do. - */ - DGAP_LOCK(dgap_dl_lock, lock_flags2); - if (dgap_dl_action != 1) { - dgap_dl_action = 1; - wake_up_interruptible(&dgap_dl_wait); - } - DGAP_UNLOCK(dgap_dl_lock, lock_flags2); - } - - /* Move to next state */ - if (bd->state == FINISHED_DEVICE_CREATION) { - bd->state = NEED_BIOS_LOAD; - } - - /* Move to next state */ - if (bd->state == NEED_BIOS_LOAD) { - /* - * Signal downloader, its got some work to do. - */ - DGAP_LOCK(dgap_dl_lock, lock_flags2); - if (dgap_dl_action != 1) { - dgap_dl_action = 1; - wake_up_interruptible(&dgap_dl_wait); - } - DGAP_UNLOCK(dgap_dl_lock, lock_flags2); - } - - /* Wait for BIOS to test board... */ - if (bd->state == WAIT_BIOS_LOAD) { - dgap_do_wait_for_bios(bd); - } - - /* Move to next state */ - if (bd->state == FINISHED_BIOS_LOAD) { - bd->state = NEED_FEP_LOAD; - - /* - * Signal downloader, its got some work to do. - */ - DGAP_LOCK(dgap_dl_lock, lock_flags2); - if (dgap_dl_action != 1) { - dgap_dl_action = 1; - wake_up_interruptible(&dgap_dl_wait); - } - DGAP_UNLOCK(dgap_dl_lock, lock_flags2); - } - - /* Wait for FEP to load on board... */ - if (bd->state == WAIT_FEP_LOAD) { - dgap_do_wait_for_fep(bd); - } - - - /* Move to next state */ - if (bd->state == FINISHED_FEP_LOAD) { - - /* - * Do tty device initialization. - */ - int rc = dgap_tty_init(bd); - - if (rc < 0) { - dgap_tty_uninit(bd); - APR(("Can't init tty devices (%d)\n", rc)); - bd->state = BOARD_FAILED; - bd->dpastatus = BD_NOFEP; - } - else { - bd->state = NEED_PROC_CREATION; - - /* - * Signal downloader, its got some work to do. - */ - DGAP_LOCK(dgap_dl_lock, lock_flags2); - if (dgap_dl_action != 1) { - dgap_dl_action = 1; - wake_up_interruptible(&dgap_dl_wait); - } - DGAP_UNLOCK(dgap_dl_lock, lock_flags2); - } - } - - /* Move to next state */ - if (bd->state == FINISHED_PROC_CREATION) { - - bd->state = BOARD_READY; - bd->dpastatus = BD_RUNNING; - - /* - * If user requested the board to run in interrupt mode, - * go and set it up on the board. - */ - if (bd->intr_used) { - writew(1, (bd->re_map_membase + ENABLE_INTR)); - /* - * Tell the board to poll the UARTS as fast as possible. - */ - writew(FEPPOLL_MIN, (bd->re_map_membase + FEPPOLL)); - bd->intr_running = 1; - } - - /* Wake up anyone waiting for board state to change to ready */ - wake_up_interruptible(&bd->state_wait); - } - - DGAP_UNLOCK(bd->bd_lock, lock_flags); -} - - -/*======================================================================= - * - * dgap_cmdb - Sends a 2 byte command to the FEP. - * - * ch - Pointer to channel structure. - * cmd - Command to be sent. - * byte1 - Integer containing first byte to be sent. - * byte2 - Integer containing second byte to be sent. - * ncmds - Wait until ncmds or fewer cmds are left - * in the cmd buffer before returning. - * - *=======================================================================*/ -void dgap_cmdb(struct channel_t *ch, uchar cmd, uchar byte1, uchar byte2, uint ncmds) -{ - char *vaddr = NULL; - struct cm_t *cm_addr = NULL; - uint count; - uint n; - u16 head; - u16 tail; - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) - return; - - /* - * Check if board is still alive. - */ - if (ch->ch_bd->state == BOARD_FAILED) { - DPR_CORE(("%s:%d board is in failed state.\n", __FILE__, __LINE__)); - return; - } - - /* - * Make sure the pointers are in range before - * writing to the FEP memory. - */ - vaddr = ch->ch_bd->re_map_membase; - - if (!vaddr) - return; - - cm_addr = (struct cm_t *) (vaddr + CMDBUF); - head = readw(&(cm_addr->cm_head)); - - /* - * Forget it if pointers out of range. - */ - if (head >= (CMDMAX - CMDSTART) || (head & 03)) { - DPR_CORE(("%s:%d pointers out of range, failing board!\n", __FILE__, __LINE__)); - ch->ch_bd->state = BOARD_FAILED; - return; - } - - /* - * Put the data in the circular command buffer. - */ - writeb(cmd, (char *) (vaddr + head + CMDSTART + 0)); - writeb((uchar) ch->ch_portnum, (char *) (vaddr + head + CMDSTART + 1)); - writeb(byte1, (char *) (vaddr + head + CMDSTART + 2)); - writeb(byte2, (char *) (vaddr + head + CMDSTART + 3)); - - head = (head + 4) & (CMDMAX - CMDSTART - 4); - - writew(head, &(cm_addr->cm_head)); - - /* - * Wait if necessary before updating the head - * pointer to limit the number of outstanding - * commands to the FEP. If the time spent waiting - * is outlandish, declare the FEP dead. - */ - for (count = dgap_count ;;) { - - head = readw(&(cm_addr->cm_head)); - tail = readw(&(cm_addr->cm_tail)); - - n = (head - tail) & (CMDMAX - CMDSTART - 4); - - if (n <= ncmds * sizeof(struct cm_t)) - break; - - if (--count == 0) { - DPR_CORE(("%s:%d failing board.\n",__FILE__, __LINE__)); - ch->ch_bd->state = BOARD_FAILED; - return; - } - udelay(10); - } -} - - -/*======================================================================= - * - * dgap_cmdw - Sends a 1 word command to the FEP. - * - * ch - Pointer to channel structure. - * cmd - Command to be sent. - * word - Integer containing word to be sent. - * ncmds - Wait until ncmds or fewer cmds are left - * in the cmd buffer before returning. - * - *=======================================================================*/ -void dgap_cmdw(struct channel_t *ch, uchar cmd, u16 word, uint ncmds) -{ - char *vaddr = NULL; - struct cm_t *cm_addr = NULL; - uint count; - uint n; - u16 head; - u16 tail; - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) - return; - - /* - * Check if board is still alive. - */ - if (ch->ch_bd->state == BOARD_FAILED) { - DPR_CORE(("%s:%d board is failed!\n", __FILE__, __LINE__)); - return; - } - - /* - * Make sure the pointers are in range before - * writing to the FEP memory. - */ - vaddr = ch->ch_bd->re_map_membase; - if (!vaddr) - return; - - cm_addr = (struct cm_t *) (vaddr + CMDBUF); - head = readw(&(cm_addr->cm_head)); - - /* - * Forget it if pointers out of range. - */ - if (head >= (CMDMAX - CMDSTART) || (head & 03)) { - DPR_CORE(("%s:%d Pointers out of range. Failing board.\n",__FILE__, __LINE__)); - ch->ch_bd->state = BOARD_FAILED; - return; - } - - /* - * Put the data in the circular command buffer. - */ - writeb(cmd, (char *) (vaddr + head + CMDSTART + 0)); - writeb((uchar) ch->ch_portnum, (char *) (vaddr + head + CMDSTART + 1)); - writew((u16) word, (char *) (vaddr + head + CMDSTART + 2)); - - head = (head + 4) & (CMDMAX - CMDSTART - 4); - - writew(head, &(cm_addr->cm_head)); - - /* - * Wait if necessary before updating the head - * pointer to limit the number of outstanding - * commands to the FEP. If the time spent waiting - * is outlandish, declare the FEP dead. - */ - for (count = dgap_count ;;) { - - head = readw(&(cm_addr->cm_head)); - tail = readw(&(cm_addr->cm_tail)); - - n = (head - tail) & (CMDMAX - CMDSTART - 4); - - if (n <= ncmds * sizeof(struct cm_t)) - break; - - if (--count == 0) { - DPR_CORE(("%s:%d Failing board.\n",__FILE__, __LINE__)); - ch->ch_bd->state = BOARD_FAILED; - return; - } - udelay(10); - } -} - - - -/*======================================================================= - * - * dgap_cmdw_ext - Sends a extended word command to the FEP. - * - * ch - Pointer to channel structure. - * cmd - Command to be sent. - * word - Integer containing word to be sent. - * ncmds - Wait until ncmds or fewer cmds are left - * in the cmd buffer before returning. - * - *=======================================================================*/ -static void dgap_cmdw_ext(struct channel_t *ch, u16 cmd, u16 word, uint ncmds) -{ - char *vaddr = NULL; - struct cm_t *cm_addr = NULL; - uint count; - uint n; - u16 head; - u16 tail; - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) - return; - - /* - * Check if board is still alive. - */ - if (ch->ch_bd->state == BOARD_FAILED) { - DPR_CORE(("%s:%d board is failed!\n", __FILE__, __LINE__)); - return; - } - - /* - * Make sure the pointers are in range before - * writing to the FEP memory. - */ - vaddr = ch->ch_bd->re_map_membase; - if (!vaddr) - return; - - cm_addr = (struct cm_t *) (vaddr + CMDBUF); - head = readw(&(cm_addr->cm_head)); - - /* - * Forget it if pointers out of range. - */ - if (head >= (CMDMAX - CMDSTART) || (head & 03)) { - DPR_CORE(("%s:%d Pointers out of range. Failing board.\n",__FILE__, __LINE__)); - ch->ch_bd->state = BOARD_FAILED; - return; - } - - /* - * Put the data in the circular command buffer. - */ - - /* Write an FF to tell the FEP that we want an extended command */ - writeb((uchar) 0xff, (char *) (vaddr + head + CMDSTART + 0)); - - writeb((uchar) ch->ch_portnum, (uchar *) (vaddr + head + CMDSTART + 1)); - writew((u16) cmd, (char *) (vaddr + head + CMDSTART + 2)); - - /* - * If the second part of the command won't fit, - * put it at the beginning of the circular buffer. - */ - if (((head + 4) >= ((CMDMAX - CMDSTART)) || (head & 03))) { - writew((u16) word, (char *) (vaddr + CMDSTART)); - } else { - writew((u16) word, (char *) (vaddr + head + CMDSTART + 4)); - } - - head = (head + 8) & (CMDMAX - CMDSTART - 4); - - writew(head, &(cm_addr->cm_head)); - - /* - * Wait if necessary before updating the head - * pointer to limit the number of outstanding - * commands to the FEP. If the time spent waiting - * is outlandish, declare the FEP dead. - */ - for (count = dgap_count ;;) { - - head = readw(&(cm_addr->cm_head)); - tail = readw(&(cm_addr->cm_tail)); - - n = (head - tail) & (CMDMAX - CMDSTART - 4); - - if (n <= ncmds * sizeof(struct cm_t)) - break; - - if (--count == 0) { - DPR_CORE(("%s:%d Failing board.\n",__FILE__, __LINE__)); - ch->ch_bd->state = BOARD_FAILED; - return; - } - udelay(10); - } -} - - -/*======================================================================= - * - * dgap_wmove - Write data to FEP buffer. - * - * ch - Pointer to channel structure. - * buf - Poiter to characters to be moved. - * cnt - Number of characters to move. - * - *=======================================================================*/ -void dgap_wmove(struct channel_t *ch, char *buf, uint cnt) -{ - int n; - char *taddr; - struct bs_t *bs; - u16 head; - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) - return; - - /* - * Check parameters. - */ - bs = ch->ch_bs; - head = readw(&(bs->tx_head)); - - /* - * If pointers are out of range, just return. - */ - if ((cnt > ch->ch_tsize) || (unsigned)(head - ch->ch_tstart) >= ch->ch_tsize) { - DPR_CORE(("%s:%d pointer out of range", __FILE__, __LINE__)); - return; - } - - /* - * If the write wraps over the top of the circular buffer, - * move the portion up to the wrap point, and reset the - * pointers to the bottom. - */ - n = ch->ch_tstart + ch->ch_tsize - head; - - if (cnt >= n) { - cnt -= n; - taddr = ch->ch_taddr + head; - memcpy_toio(taddr, buf, n); - head = ch->ch_tstart; - buf += n; - } - - /* - * Move rest of data. - */ - taddr = ch->ch_taddr + head; - n = cnt; - memcpy_toio(taddr, buf, n); - head += cnt; - - writew(head, &(bs->tx_head)); -} - -/* - * Retrives the current custom baud rate from FEP memory, - * and returns it back to the user. - * Returns 0 on error. - */ -uint dgap_get_custom_baud(struct channel_t *ch) -{ - uchar *vaddr; - ulong offset = 0; - uint value = 0; - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) { - return 0; - } - - if (!ch->ch_bd || ch->ch_bd->magic != DGAP_BOARD_MAGIC) { - return 0; - } - - if (!(ch->ch_bd->bd_flags & BD_FEP5PLUS)) - return 0; - - vaddr = ch->ch_bd->re_map_membase; - - if (!vaddr) - return 0; - - /* - * Go get from fep mem, what the fep - * believes the custom baud rate is. - */ - offset = ((((*(unsigned short *)(vaddr + ECS_SEG)) << 4) + - (ch->ch_portnum * 0x28) + LINE_SPEED)); - - value = readw(vaddr + offset); - return value; -} - - -/* - * Calls the firmware to reset this channel. - */ -void dgap_firmware_reset_port(struct channel_t *ch) -{ - dgap_cmdb(ch, CHRESET, 0, 0, 0); - - /* - * Now that the channel is reset, we need to make sure - * all the current settings get reapplied to the port - * in the firmware. - * - * So we will set the driver's cache of firmware - * settings all to 0, and then call param. - */ - ch->ch_fepiflag = 0; - ch->ch_fepcflag = 0; - ch->ch_fepoflag = 0; - ch->ch_fepstartc = 0; - ch->ch_fepstopc = 0; - ch->ch_fepastartc = 0; - ch->ch_fepastopc = 0; - ch->ch_mostat = 0; - ch->ch_hflow = 0; -} - - -/*======================================================================= - * - * dgap_param - Set Digi parameters. - * - * struct tty_struct * - TTY for port. - * - *=======================================================================*/ -int dgap_param(struct tty_struct *tty) -{ - struct ktermios *ts; - struct board_t *bd; - struct channel_t *ch; - struct bs_t *bs; - struct un_t *un; - u16 head; - u16 cflag; - u16 iflag; - uchar mval; - uchar hflow; - - if (!tty || tty->magic != TTY_MAGIC) - return -ENXIO; - - un = (struct un_t *) tty->driver_data; - if (!un || un->magic != DGAP_UNIT_MAGIC) - return -ENXIO; - - ch = un->un_ch; - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) - return -ENXIO; - - bd = ch->ch_bd; - if (!bd || bd->magic != DGAP_BOARD_MAGIC) - return -ENXIO; - - bs = ch->ch_bs; - if (!bs) - return -ENXIO; - - DPR_PARAM(("param start: tdev: %x cflags: %x oflags: %x iflags: %x\n", - ch->ch_tun.un_dev, ch->ch_c_cflag, ch->ch_c_oflag, ch->ch_c_iflag)); - - ts = &tty->termios; - - /* - * If baud rate is zero, flush queues, and set mval to drop DTR. - */ - if ((ch->ch_c_cflag & (CBAUD)) == 0) { - - /* flush rx */ - head = readw(&(ch->ch_bs->rx_head)); - writew(head, &(ch->ch_bs->rx_tail)); - - /* flush tx */ - head = readw(&(ch->ch_bs->tx_head)); - writew(head, &(ch->ch_bs->tx_tail)); - - ch->ch_flags |= (CH_BAUD0); - - /* Drop RTS and DTR */ - ch->ch_mval &= ~(D_RTS(ch)|D_DTR(ch)); - mval = D_DTR(ch) | D_RTS(ch); - ch->ch_baud_info = 0; - - } else if (ch->ch_custom_speed && (bd->bd_flags & BD_FEP5PLUS)) { - /* - * Tell the fep to do the command - */ - - DPR_PARAM(("param: Want %d speed\n", ch->ch_custom_speed)); - - dgap_cmdw_ext(ch, 0xff01, ch->ch_custom_speed, 0); - - /* - * Now go get from fep mem, what the fep - * believes the custom baud rate is. - */ - ch->ch_baud_info = ch->ch_custom_speed = dgap_get_custom_baud(ch); - - DPR_PARAM(("param: Got %d speed\n", ch->ch_custom_speed)); - - /* Handle transition from B0 */ - if (ch->ch_flags & CH_BAUD0) { - ch->ch_flags &= ~(CH_BAUD0); - ch->ch_mval |= (D_RTS(ch)|D_DTR(ch)); - } - mval = D_DTR(ch) | D_RTS(ch); - - } else { - /* - * Set baud rate, character size, and parity. - */ - - - int iindex = 0; - int jindex = 0; - int baud = 0; - - ulong bauds[4][16] = { - { /* slowbaud */ - 0, 50, 75, 110, - 134, 150, 200, 300, - 600, 1200, 1800, 2400, - 4800, 9600, 19200, 38400 }, - { /* slowbaud & CBAUDEX */ - 0, 57600, 115200, 230400, - 460800, 150, 200, 921600, - 600, 1200, 1800, 2400, - 4800, 9600, 19200, 38400 }, - { /* fastbaud */ - 0, 57600, 76800, 115200, - 14400, 57600, 230400, 76800, - 115200, 230400, 28800, 460800, - 921600, 9600, 19200, 38400 }, - { /* fastbaud & CBAUDEX */ - 0, 57600, 115200, 230400, - 460800, 150, 200, 921600, - 600, 1200, 1800, 2400, - 4800, 9600, 19200, 38400 } - }; - - /* Only use the TXPrint baud rate if the terminal unit is NOT open */ - if (!(ch->ch_tun.un_flags & UN_ISOPEN) && (un->un_type == DGAP_PRINT)) - baud = C_BAUD(ch->ch_pun.un_tty) & 0xff; - else - baud = C_BAUD(ch->ch_tun.un_tty) & 0xff; - - if (ch->ch_c_cflag & CBAUDEX) - iindex = 1; - - if (ch->ch_digi.digi_flags & DIGI_FAST) - iindex += 2; - - jindex = baud; - - if ((iindex >= 0) && (iindex < 4) && (jindex >= 0) && (jindex < 16)) { - baud = bauds[iindex][jindex]; - } else { - DPR_IOCTL(("baud indices were out of range (%d)(%d)", - iindex, jindex)); - baud = 0; - } - - if (baud == 0) - baud = 9600; - - ch->ch_baud_info = baud; - - - /* - * CBAUD has bit position 0x1000 set these days to indicate Linux - * baud rate remap. - * We use a different bit assignment for high speed. Clear this - * bit out while grabbing the parts of "cflag" we want. - */ - cflag = ch->ch_c_cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); - - /* - * HUPCL bit is used by FEP to indicate fast baud - * table is to be used. - */ - if ((ch->ch_digi.digi_flags & DIGI_FAST) || (ch->ch_c_cflag & CBAUDEX)) - cflag |= HUPCL; - - - if ((ch->ch_c_cflag & CBAUDEX) && !(ch->ch_digi.digi_flags & DIGI_FAST)) { - /* - * The below code is trying to guarantee that only baud rates - * 115200, 230400, 460800, 921600 are remapped. We use exclusive or - * because the various baud rates share common bit positions - * and therefore can't be tested for easily. - */ - tcflag_t tcflag = (ch->ch_c_cflag & CBAUD) | CBAUDEX; - int baudpart = 0; - - /* Map high speed requests to index into FEP's baud table */ - switch (tcflag) { - case B57600 : - baudpart = 1; - break; -#ifdef B76800 - case B76800 : - baudpart = 2; - break; -#endif - case B115200 : - baudpart = 3; - break; - case B230400 : - baudpart = 9; - break; - case B460800 : - baudpart = 11; - break; -#ifdef B921600 - case B921600 : - baudpart = 12; - break; -#endif - default: - baudpart = 0; - } - - if (baudpart) - cflag = (cflag & ~(CBAUD | CBAUDEX)) | baudpart; - } - - cflag &= 0xffff; - - if (cflag != ch->ch_fepcflag) { - ch->ch_fepcflag = (u16) (cflag & 0xffff); - - /* Okay to have channel and board locks held calling this */ - dgap_cmdw(ch, SCFLAG, (u16) cflag, 0); - } - - /* Handle transition from B0 */ - if (ch->ch_flags & CH_BAUD0) { - ch->ch_flags &= ~(CH_BAUD0); - ch->ch_mval |= (D_RTS(ch)|D_DTR(ch)); - } - mval = D_DTR(ch) | D_RTS(ch); - } - - /* - * Get input flags. - */ - iflag = ch->ch_c_iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP | IXON | IXANY | IXOFF); - - if ((ch->ch_startc == _POSIX_VDISABLE) || (ch->ch_stopc == _POSIX_VDISABLE)) { - iflag &= ~(IXON | IXOFF); - ch->ch_c_iflag &= ~(IXON | IXOFF); - } - - /* - * Only the IBM Xr card can switch between - * 232 and 422 modes on the fly - */ - if (bd->device == PCI_DEVICE_XR_IBM_DID) { - if (ch->ch_digi.digi_flags & DIGI_422) - dgap_cmdb(ch, SCOMMODE, MODE_422, 0, 0); - else - dgap_cmdb(ch, SCOMMODE, MODE_232, 0, 0); - } - - if (ch->ch_digi.digi_flags & DIGI_ALTPIN) - iflag |= IALTPIN ; - - if (iflag != ch->ch_fepiflag) { - ch->ch_fepiflag = iflag; - - /* Okay to have channel and board locks held calling this */ - dgap_cmdw(ch, SIFLAG, (u16) ch->ch_fepiflag, 0); - } - - /* - * Select hardware handshaking. - */ - hflow = 0; - - if (ch->ch_c_cflag & CRTSCTS) { - hflow |= (D_RTS(ch) | D_CTS(ch)); - } - if (ch->ch_digi.digi_flags & RTSPACE) - hflow |= D_RTS(ch); - if (ch->ch_digi.digi_flags & DTRPACE) - hflow |= D_DTR(ch); - if (ch->ch_digi.digi_flags & CTSPACE) - hflow |= D_CTS(ch); - if (ch->ch_digi.digi_flags & DSRPACE) - hflow |= D_DSR(ch); - if (ch->ch_digi.digi_flags & DCDPACE) - hflow |= D_CD(ch); - - if (hflow != ch->ch_hflow) { - ch->ch_hflow = hflow; - - /* Okay to have channel and board locks held calling this */ - dgap_cmdb(ch, SHFLOW, (uchar) hflow, 0xff, 0); - } - - - /* - * Set RTS and/or DTR Toggle if needed, but only if product is FEP5+ based. - */ - if (bd->bd_flags & BD_FEP5PLUS) { - u16 hflow2 = 0; - if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) { - hflow2 |= (D_RTS(ch)); - } - if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) { - hflow2 |= (D_DTR(ch)); - } - - dgap_cmdw_ext(ch, 0xff03, hflow2, 0); - } - - /* - * Set modem control lines. - */ - - mval ^= ch->ch_mforce & (mval ^ ch->ch_mval); - - DPR_PARAM(("dgap_param: mval: %x ch_mforce: %x ch_mval: %x ch_mostat: %x\n", - mval, ch->ch_mforce, ch->ch_mval, ch->ch_mostat)); - - if (ch->ch_mostat ^ mval) { - ch->ch_mostat = mval; - - /* Okay to have channel and board locks held calling this */ - DPR_PARAM(("dgap_param: Sending SMODEM mval: %x\n", mval)); - dgap_cmdb(ch, SMODEM, (uchar) mval, D_RTS(ch)|D_DTR(ch), 0); - } - - /* - * Read modem signals, and then call carrier function. - */ - ch->ch_mistat = readb(&(bs->m_stat)); - dgap_carrier(ch); - - /* - * Set the start and stop characters. - */ - if (ch->ch_startc != ch->ch_fepstartc || ch->ch_stopc != ch->ch_fepstopc) { - ch->ch_fepstartc = ch->ch_startc; - ch->ch_fepstopc = ch->ch_stopc; - - /* Okay to have channel and board locks held calling this */ - dgap_cmdb(ch, SFLOWC, ch->ch_fepstartc, ch->ch_fepstopc, 0); - } - - /* - * Set the Auxiliary start and stop characters. - */ - if (ch->ch_astartc != ch->ch_fepastartc || ch->ch_astopc != ch->ch_fepastopc) { - ch->ch_fepastartc = ch->ch_astartc; - ch->ch_fepastopc = ch->ch_astopc; - - /* Okay to have channel and board locks held calling this */ - dgap_cmdb(ch, SAFLOWC, ch->ch_fepastartc, ch->ch_fepastopc, 0); - } - - DPR_PARAM(("param finish\n")); - - return 0; -} - - -/* - * dgap_parity_scan() - * - * Convert the FEP5 way of reporting parity errors and breaks into - * the Linux line discipline way. - */ -void dgap_parity_scan(struct channel_t *ch, unsigned char *cbuf, unsigned char *fbuf, int *len) -{ - int l = *len; - int count = 0; - unsigned char *in, *cout, *fout; - unsigned char c; - - in = cbuf; - cout = cbuf; - fout = fbuf; - - DPR_PSCAN(("dgap_parity_scan start\n")); - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) - return; - - while (l--) { - c = *in++; - switch (ch->pscan_state) { - default: - /* reset to sanity and fall through */ - ch->pscan_state = 0; - - case 0: - /* No FF seen yet */ - if (c == (unsigned char) '\377') { - /* delete this character from stream */ - ch->pscan_state = 1; - } else { - *cout++ = c; - *fout++ = TTY_NORMAL; - count += 1; - } - break; - - case 1: - /* first FF seen */ - if (c == (unsigned char) '\377') { - /* doubled ff, transform to single ff */ - *cout++ = c; - *fout++ = TTY_NORMAL; - count += 1; - ch->pscan_state = 0; - } else { - /* save value examination in next state */ - ch->pscan_savechar = c; - ch->pscan_state = 2; - } - break; - - case 2: - /* third character of ff sequence */ - - *cout++ = c; - - if (ch->pscan_savechar == 0x0) { - - if (c == 0x0) { - DPR_PSCAN(("dgap_parity_scan in 3rd char of ff seq. c: %x setting break.\n", c)); - ch->ch_err_break++; - *fout++ = TTY_BREAK; - } - else { - DPR_PSCAN(("dgap_parity_scan in 3rd char of ff seq. c: %x setting parity.\n", c)); - ch->ch_err_parity++; - *fout++ = TTY_PARITY; - } - } - else { - DPR_PSCAN(("%s:%d Logic Error.\n", __FILE__, __LINE__)); - } - - count += 1; - ch->pscan_state = 0; - } - } - *len = count; - DPR_PSCAN(("dgap_parity_scan finish\n")); -} - - - - -/*======================================================================= - * - * dgap_event - FEP to host event processing routine. - * - * bd - Board of current event. - * - *=======================================================================*/ -static int dgap_event(struct board_t *bd) -{ - struct channel_t *ch; - ulong lock_flags; - ulong lock_flags2; - struct bs_t *bs; - uchar *event; - uchar *vaddr = NULL; - struct ev_t *eaddr = NULL; - uint head; - uint tail; - int port; - int reason; - int modem; - int b1; - - if (!bd || bd->magic != DGAP_BOARD_MAGIC) - return -ENXIO; - - DGAP_LOCK(bd->bd_lock, lock_flags); - - vaddr = bd->re_map_membase; - - if (!vaddr) { - DGAP_UNLOCK(bd->bd_lock, lock_flags); - return -ENXIO; - } - - eaddr = (struct ev_t *) (vaddr + EVBUF); - - /* Get our head and tail */ - head = readw(&(eaddr->ev_head)); - tail = readw(&(eaddr->ev_tail)); - - /* - * Forget it if pointers out of range. - */ - - if (head >= EVMAX - EVSTART || tail >= EVMAX - EVSTART || - (head | tail) & 03) { - DPR_EVENT(("should be calling xxfail %d\n", __LINE__)); - /* Let go of board lock */ - DGAP_UNLOCK(bd->bd_lock, lock_flags); - return -ENXIO; - } - - /* - * Loop to process all the events in the buffer. - */ - while (tail != head) { - - /* - * Get interrupt information. - */ - - event = bd->re_map_membase + tail + EVSTART; - - port = event[0]; - reason = event[1]; - modem = event[2]; - b1 = event[3]; - - DPR_EVENT(("event: jiffies: %ld port: %d reason: %x modem: %x\n", - jiffies, port, reason, modem)); - - /* - * Make sure the interrupt is valid. - */ - if (port >= bd->nasync) - goto next; - - if (!(reason & (IFMODEM | IFBREAK | IFTLW | IFTEM | IFDATA))) { - goto next; - } - - ch = bd->channels[port]; - - if (!ch || ch->magic != DGAP_CHANNEL_MAGIC) { - goto next; - } - - /* - * If we have made it here, the event was valid. - * Lock down the channel. - */ - DGAP_LOCK(ch->ch_lock, lock_flags2); - - bs = ch->ch_bs; - - if (!bs) { - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - goto next; - } - - /* - * Process received data. - */ - if (reason & IFDATA) { - - /* - * ALL LOCKS *MUST* BE DROPPED BEFORE CALLING INPUT! - * input could send some data to ld, which in turn - * could do a callback to one of our other functions. - */ - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - DGAP_UNLOCK(bd->bd_lock, lock_flags); - - dgap_input(ch); - - DGAP_LOCK(bd->bd_lock, lock_flags); - DGAP_LOCK(ch->ch_lock, lock_flags2); - - if (ch->ch_flags & CH_RACTIVE) - ch->ch_flags |= CH_RENABLE; - else - writeb(1, &(bs->idata)); - - if (ch->ch_flags & CH_RWAIT) { - ch->ch_flags &= ~CH_RWAIT; - - wake_up_interruptible(&ch->ch_tun.un_flags_wait); - } - } - - /* - * Process Modem change signals. - */ - if (reason & IFMODEM) { - ch->ch_mistat = modem; - dgap_carrier(ch); - } - - /* - * Process break. - */ - if (reason & IFBREAK) { - - DPR_EVENT(("got IFBREAK\n")); - - if (ch->ch_tun.un_tty) { - /* A break has been indicated */ - ch->ch_err_break++; - tty_buffer_request_room(ch->ch_tun.un_tty->port, 1); - tty_insert_flip_char(ch->ch_tun.un_tty->port, 0, TTY_BREAK); - tty_flip_buffer_push(ch->ch_tun.un_tty->port); - } - } - - /* - * Process Transmit low. - */ - if (reason & IFTLW) { - - DPR_EVENT(("event: got low event\n")); - - if (ch->ch_tun.un_flags & UN_LOW) { - ch->ch_tun.un_flags &= ~UN_LOW; - - if (ch->ch_tun.un_flags & UN_ISOPEN) { - if ((ch->ch_tun.un_tty->flags & - (1 << TTY_DO_WRITE_WAKEUP)) && -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - ch->ch_tun.un_tty->ldisc->ops->write_wakeup) -#else - ch->ch_tun.un_tty->ldisc.ops->write_wakeup) -#endif - { - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - DGAP_UNLOCK(bd->bd_lock, lock_flags); -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - (ch->ch_tun.un_tty->ldisc->ops->write_wakeup)(ch->ch_tun.un_tty); -#else - (ch->ch_tun.un_tty->ldisc.ops->write_wakeup)(ch->ch_tun.un_tty); -#endif - DGAP_LOCK(bd->bd_lock, lock_flags); - DGAP_LOCK(ch->ch_lock, lock_flags2); - } - wake_up_interruptible(&ch->ch_tun.un_tty->write_wait); - wake_up_interruptible(&ch->ch_tun.un_flags_wait); - - DPR_EVENT(("event: Got low event. jiffies: %lu\n", jiffies)); - } - } - - if (ch->ch_pun.un_flags & UN_LOW) { - ch->ch_pun.un_flags &= ~UN_LOW; - if (ch->ch_pun.un_flags & UN_ISOPEN) { - if ((ch->ch_pun.un_tty->flags & - (1 << TTY_DO_WRITE_WAKEUP)) && -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - ch->ch_pun.un_tty->ldisc->ops->write_wakeup) -#else - ch->ch_pun.un_tty->ldisc.ops->write_wakeup) -#endif - { - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - DGAP_UNLOCK(bd->bd_lock, lock_flags); -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - (ch->ch_pun.un_tty->ldisc->ops->write_wakeup)(ch->ch_pun.un_tty); -#else - (ch->ch_pun.un_tty->ldisc.ops->write_wakeup)(ch->ch_pun.un_tty); -#endif - DGAP_LOCK(bd->bd_lock, lock_flags); - DGAP_LOCK(ch->ch_lock, lock_flags2); - } - wake_up_interruptible(&ch->ch_pun.un_tty->write_wait); - wake_up_interruptible(&ch->ch_pun.un_flags_wait); - } - } - - if (ch->ch_flags & CH_WLOW) { - ch->ch_flags &= ~CH_WLOW; - wake_up_interruptible(&ch->ch_flags_wait); - } - } - - /* - * Process Transmit empty. - */ - if (reason & IFTEM) { - DPR_EVENT(("event: got empty event\n")); - - if (ch->ch_tun.un_flags & UN_EMPTY) { - ch->ch_tun.un_flags &= ~UN_EMPTY; - if (ch->ch_tun.un_flags & UN_ISOPEN) { - if ((ch->ch_tun.un_tty->flags & - (1 << TTY_DO_WRITE_WAKEUP)) && -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - ch->ch_tun.un_tty->ldisc->ops->write_wakeup) -#else - ch->ch_tun.un_tty->ldisc.ops->write_wakeup) -#endif - { - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - DGAP_UNLOCK(bd->bd_lock, lock_flags); -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - (ch->ch_tun.un_tty->ldisc->ops->write_wakeup)(ch->ch_tun.un_tty); -#else - (ch->ch_tun.un_tty->ldisc.ops->write_wakeup)(ch->ch_tun.un_tty); -#endif - DGAP_LOCK(bd->bd_lock, lock_flags); - DGAP_LOCK(ch->ch_lock, lock_flags2); - } - wake_up_interruptible(&ch->ch_tun.un_tty->write_wait); - wake_up_interruptible(&ch->ch_tun.un_flags_wait); - } - } - - if (ch->ch_pun.un_flags & UN_EMPTY) { - ch->ch_pun.un_flags &= ~UN_EMPTY; - if (ch->ch_pun.un_flags & UN_ISOPEN) { - if ((ch->ch_pun.un_tty->flags & - (1 << TTY_DO_WRITE_WAKEUP)) && -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - ch->ch_pun.un_tty->ldisc->ops->write_wakeup) -#else - ch->ch_pun.un_tty->ldisc.ops->write_wakeup) -#endif - { - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - DGAP_UNLOCK(bd->bd_lock, lock_flags); -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31) - (ch->ch_pun.un_tty->ldisc->ops->write_wakeup)(ch->ch_pun.un_tty); -#else - (ch->ch_pun.un_tty->ldisc.ops->write_wakeup)(ch->ch_pun.un_tty); -#endif - DGAP_LOCK(bd->bd_lock, lock_flags); - DGAP_LOCK(ch->ch_lock, lock_flags2); - } - wake_up_interruptible(&ch->ch_pun.un_tty->write_wait); - wake_up_interruptible(&ch->ch_pun.un_flags_wait); - } - } - - - if (ch->ch_flags & CH_WEMPTY) { - ch->ch_flags &= ~CH_WEMPTY; - wake_up_interruptible(&ch->ch_flags_wait); - } - } - - DGAP_UNLOCK(ch->ch_lock, lock_flags2); - -next: - tail = (tail + 4) & (EVMAX - EVSTART - 4); - } - - writew(tail, &(eaddr->ev_tail)); - DGAP_UNLOCK(bd->bd_lock, lock_flags); - - return 0; -} |