diff options
Diffstat (limited to 'drivers/isdn/hysdn/boardergo.c')
| -rw-r--r-- | drivers/isdn/hysdn/boardergo.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/drivers/isdn/hysdn/boardergo.c b/drivers/isdn/hysdn/boardergo.c new file mode 100644 index 00000000000..e19a01a305a --- /dev/null +++ b/drivers/isdn/hysdn/boardergo.c @@ -0,0 +1,453 @@ +/* $Id: boardergo.c,v 1.5.6.7 2001/11/06 21:58:19 kai Exp $ + * + * Linux driver for HYSDN cards, specific routines for ergo type boards. + * + * Author Werner Cornelius (werner@titro.de) for Hypercope GmbH + * Copyright 1999 by Werner Cornelius (werner@titro.de) + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * As all Linux supported cards Champ2, Ergo and Metro2/4 use the same + * DPRAM interface and layout with only minor differences all related + * stuff is done here, not in separate modules. + * + */ + +#include <linux/config.h> +#include <linux/sched.h> +#include <linux/signal.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/vmalloc.h> +#include <linux/delay.h> +#include <asm/io.h> + +#include "hysdn_defs.h" +#include "boardergo.h" + +#define byteout(addr,val) outb(val,addr) +#define bytein(addr) inb(addr) + +/***************************************************/ +/* The cards interrupt handler. Called from system */ +/***************************************************/ +static irqreturn_t +ergo_interrupt(int intno, void *dev_id, struct pt_regs *regs) +{ + hysdn_card *card = dev_id; /* parameter from irq */ + tErgDpram *dpr; + ulong flags; + uchar volatile b; + + if (!card) + return IRQ_NONE; /* error -> spurious interrupt */ + if (!card->irq_enabled) + return IRQ_NONE; /* other device interrupting or irq switched off */ + + save_flags(flags); + cli(); /* no further irqs allowed */ + + if (!(bytein(card->iobase + PCI9050_INTR_REG) & PCI9050_INTR_REG_STAT1)) { + restore_flags(flags); /* restore old state */ + return IRQ_NONE; /* no interrupt requested by E1 */ + } + /* clear any pending ints on the board */ + dpr = card->dpram; + b = dpr->ToPcInt; /* clear for ergo */ + b |= dpr->ToPcIntMetro; /* same for metro */ + b |= dpr->ToHyInt; /* and for champ */ + + /* start kernel task immediately after leaving all interrupts */ + if (!card->hw_lock) + schedule_work(&card->irq_queue); + restore_flags(flags); + return IRQ_HANDLED; +} /* ergo_interrupt */ + +/******************************************************************************/ +/* ergo_irq_bh is the function called by the immediate kernel task list after */ +/* being activated with queue_task and no interrupts active. This task is the */ +/* only one handling data transfer from or to the card after booting. The task */ +/* may be queued from everywhere (interrupts included). */ +/******************************************************************************/ +static void +ergo_irq_bh(hysdn_card * card) +{ + tErgDpram *dpr; + int again; + ulong flags; + + if (card->state != CARD_STATE_RUN) + return; /* invalid call */ + + dpr = card->dpram; /* point to DPRAM */ + + save_flags(flags); + cli(); + if (card->hw_lock) { + restore_flags(flags); /* hardware currently unavailable */ + return; + } + card->hw_lock = 1; /* we now lock the hardware */ + + do { + sti(); /* reenable other ints */ + again = 0; /* assume loop not to be repeated */ + + if (!dpr->ToHyFlag) { + /* we are able to send a buffer */ + + if (hysdn_sched_tx(card, dpr->ToHyBuf, &dpr->ToHySize, &dpr->ToHyChannel, + ERG_TO_HY_BUF_SIZE)) { + dpr->ToHyFlag = 1; /* enable tx */ + again = 1; /* restart loop */ + } + } /* we are able to send a buffer */ + if (dpr->ToPcFlag) { + /* a message has arrived for us, handle it */ + + if (hysdn_sched_rx(card, dpr->ToPcBuf, dpr->ToPcSize, dpr->ToPcChannel)) { + dpr->ToPcFlag = 0; /* we worked the data */ + again = 1; /* restart loop */ + } + } /* a message has arrived for us */ + cli(); /* no further ints */ + if (again) { + dpr->ToHyInt = 1; + dpr->ToPcInt = 1; /* interrupt to E1 for all cards */ + } else + card->hw_lock = 0; /* free hardware again */ + } while (again); /* until nothing more to do */ + + restore_flags(flags); +} /* ergo_irq_bh */ + + +/*********************************************************/ +/* stop the card (hardware reset) and disable interrupts */ +/*********************************************************/ +static void +ergo_stopcard(hysdn_card * card) +{ + ulong flags; + uchar val; + + hysdn_net_release(card); /* first release the net device if existing */ +#ifdef CONFIG_HYSDN_CAPI + hycapi_capi_stop(card); +#endif /* CONFIG_HYSDN_CAPI */ + save_flags(flags); + cli(); + val = bytein(card->iobase + PCI9050_INTR_REG); /* get actual value */ + val &= ~(PCI9050_INTR_REG_ENPCI | PCI9050_INTR_REG_EN1); /* mask irq */ + byteout(card->iobase + PCI9050_INTR_REG, val); + card->irq_enabled = 0; + byteout(card->iobase + PCI9050_USER_IO, PCI9050_E1_RESET); /* reset E1 processor */ + card->state = CARD_STATE_UNUSED; + card->err_log_state = ERRLOG_STATE_OFF; /* currently no log active */ + + restore_flags(flags); +} /* ergo_stopcard */ + +/**************************************************************************/ +/* enable or disable the cards error log. The event is queued if possible */ +/**************************************************************************/ +static void +ergo_set_errlog_state(hysdn_card * card, int on) +{ + ulong flags; + + if (card->state != CARD_STATE_RUN) { + card->err_log_state = ERRLOG_STATE_OFF; /* must be off */ + return; + } + save_flags(flags); + cli(); + + if (((card->err_log_state == ERRLOG_STATE_OFF) && !on) || + ((card->err_log_state == ERRLOG_STATE_ON) && on)) { + restore_flags(flags); + return; /* nothing to do */ + } + if (on) + card->err_log_state = ERRLOG_STATE_START; /* request start */ + else + card->err_log_state = ERRLOG_STATE_STOP; /* request stop */ + + restore_flags(flags); + schedule_work(&card->irq_queue); +} /* ergo_set_errlog_state */ + +/******************************************/ +/* test the cards RAM and return 0 if ok. */ +/******************************************/ +static const char TestText[36] = "This Message is filler, why read it"; + +static int +ergo_testram(hysdn_card * card) +{ + tErgDpram *dpr = card->dpram; + + memset(dpr->TrapTable, 0, sizeof(dpr->TrapTable)); /* clear all Traps */ + dpr->ToHyInt = 1; /* E1 INTR state forced */ + + memcpy(&dpr->ToHyBuf[ERG_TO_HY_BUF_SIZE - sizeof(TestText)], TestText, + sizeof(TestText)); + if (memcmp(&dpr->ToHyBuf[ERG_TO_HY_BUF_SIZE - sizeof(TestText)], TestText, + sizeof(TestText))) + return (-1); + + memcpy(&dpr->ToPcBuf[ERG_TO_PC_BUF_SIZE - sizeof(TestText)], TestText, + sizeof(TestText)); + if (memcmp(&dpr->ToPcBuf[ERG_TO_PC_BUF_SIZE - sizeof(TestText)], TestText, + sizeof(TestText))) + return (-1); + + return (0); +} /* ergo_testram */ + +/*****************************************************************************/ +/* this function is intended to write stage 1 boot image to the cards buffer */ +/* this is done in two steps. First the 1024 hi-words are written (offs=0), */ +/* then the 1024 lo-bytes are written. The remaining DPRAM is cleared, the */ +/* PCI-write-buffers flushed and the card is taken out of reset. */ +/* The function then waits for a reaction of the E1 processor or a timeout. */ +/* Negative return values are interpreted as errors. */ +/*****************************************************************************/ +static int +ergo_writebootimg(struct HYSDN_CARD *card, uchar * buf, ulong offs) +{ + uchar *dst; + tErgDpram *dpram; + int cnt = (BOOT_IMG_SIZE >> 2); /* number of words to move and swap (byte order!) */ + + if (card->debug_flags & LOG_POF_CARD) + hysdn_addlog(card, "ERGO: write bootldr offs=0x%lx ", offs); + + dst = card->dpram; /* pointer to start of DPRAM */ + dst += (offs + ERG_DPRAM_FILL_SIZE); /* offset in the DPRAM */ + while (cnt--) { + *dst++ = *(buf + 1); /* high byte */ + *dst++ = *buf; /* low byte */ + dst += 2; /* point to next longword */ + buf += 2; /* buffer only filled with words */ + } + + /* if low words (offs = 2) have been written, clear the rest of the DPRAM, */ + /* flush the PCI-write-buffer and take the E1 out of reset */ + if (offs) { + memset(card->dpram, 0, ERG_DPRAM_FILL_SIZE); /* fill the DPRAM still not cleared */ + dpram = card->dpram; /* get pointer to dpram structure */ + dpram->ToHyNoDpramErrLog = 0xFF; /* write a dpram register */ + while (!dpram->ToHyNoDpramErrLog); /* reread volatile register to flush PCI */ + + byteout(card->iobase + PCI9050_USER_IO, PCI9050_E1_RUN); /* start E1 processor */ + /* the interrupts are still masked */ + + sti(); + msleep_interruptible(20); /* Timeout 20ms */ + + if (((tDpramBootSpooler *) card->dpram)->Len != DPRAM_SPOOLER_DATA_SIZE) { + if (card->debug_flags & LOG_POF_CARD) + hysdn_addlog(card, "ERGO: write bootldr no answer"); + return (-ERR_BOOTIMG_FAIL); + } + } /* start_boot_img */ + return (0); /* successful */ +} /* ergo_writebootimg */ + +/********************************************************************************/ +/* ergo_writebootseq writes the buffer containing len bytes to the E1 processor */ +/* using the boot spool mechanism. If everything works fine 0 is returned. In */ +/* case of errors a negative error value is returned. */ +/********************************************************************************/ +static int +ergo_writebootseq(struct HYSDN_CARD *card, uchar * buf, int len) +{ + tDpramBootSpooler *sp = (tDpramBootSpooler *) card->dpram; + uchar *dst; + uchar buflen; + int nr_write; + uchar tmp_rdptr; + uchar wr_mirror; + int i; + + if (card->debug_flags & LOG_POF_CARD) + hysdn_addlog(card, "ERGO: write boot seq len=%d ", len); + + dst = sp->Data; /* point to data in spool structure */ + buflen = sp->Len; /* maximum len of spooled data */ + wr_mirror = sp->WrPtr; /* only once read */ + sti(); + + /* try until all bytes written or error */ + i = 0x1000; /* timeout value */ + while (len) { + + /* first determine the number of bytes that may be buffered */ + do { + tmp_rdptr = sp->RdPtr; /* first read the pointer */ + i--; /* decrement timeout */ + } while (i && (tmp_rdptr != sp->RdPtr)); /* wait for stable pointer */ + + if (!i) { + if (card->debug_flags & LOG_POF_CARD) + hysdn_addlog(card, "ERGO: write boot seq timeout"); + return (-ERR_BOOTSEQ_FAIL); /* value not stable -> timeout */ + } + if ((nr_write = tmp_rdptr - wr_mirror - 1) < 0) + nr_write += buflen; /* now we got number of free bytes - 1 in buffer */ + + if (!nr_write) + continue; /* no free bytes in buffer */ + + if (nr_write > len) + nr_write = len; /* limit if last few bytes */ + i = 0x1000; /* reset timeout value */ + + /* now we know how much bytes we may put in the puffer */ + len -= nr_write; /* we savely could adjust len before output */ + while (nr_write--) { + *(dst + wr_mirror) = *buf++; /* output one byte */ + if (++wr_mirror >= buflen) + wr_mirror = 0; + sp->WrPtr = wr_mirror; /* announce the next byte to E1 */ + } /* while (nr_write) */ + + } /* while (len) */ + return (0); +} /* ergo_writebootseq */ + +/***********************************************************************************/ +/* ergo_waitpofready waits for a maximum of 10 seconds for the completition of the */ +/* boot process. If the process has been successful 0 is returned otherwise a */ +/* negative error code is returned. */ +/***********************************************************************************/ +static int +ergo_waitpofready(struct HYSDN_CARD *card) +{ + tErgDpram *dpr = card->dpram; /* pointer to DPRAM structure */ + int timecnt = 10000 / 50; /* timeout is 10 secs max. */ + ulong flags; + int msg_size; + int i; + + if (card->debug_flags & LOG_POF_CARD) + hysdn_addlog(card, "ERGO: waiting for pof ready"); + while (timecnt--) { + /* wait until timeout */ + + if (dpr->ToPcFlag) { + /* data has arrived */ + + if ((dpr->ToPcChannel != CHAN_SYSTEM) || + (dpr->ToPcSize < MIN_RDY_MSG_SIZE) || + (dpr->ToPcSize > MAX_RDY_MSG_SIZE) || + ((*(ulong *) dpr->ToPcBuf) != RDY_MAGIC)) + break; /* an error occurred */ + + /* Check for additional data delivered during SysReady */ + msg_size = dpr->ToPcSize - RDY_MAGIC_SIZE; + if (msg_size > 0) + if (EvalSysrTokData(card, dpr->ToPcBuf + RDY_MAGIC_SIZE, msg_size)) + break; + + if (card->debug_flags & LOG_POF_RECORD) + hysdn_addlog(card, "ERGO: pof boot success"); + save_flags(flags); + cli(); + + card->state = CARD_STATE_RUN; /* now card is running */ + /* enable the cards interrupt */ + byteout(card->iobase + PCI9050_INTR_REG, + bytein(card->iobase + PCI9050_INTR_REG) | + (PCI9050_INTR_REG_ENPCI | PCI9050_INTR_REG_EN1)); + card->irq_enabled = 1; /* we are ready to receive interrupts */ + + dpr->ToPcFlag = 0; /* reset data indicator */ + dpr->ToHyInt = 1; + dpr->ToPcInt = 1; /* interrupt to E1 for all cards */ + + restore_flags(flags); + if ((hynet_enable & (1 << card->myid)) + && (i = hysdn_net_create(card))) + { + ergo_stopcard(card); + card->state = CARD_STATE_BOOTERR; + return (i); + } +#ifdef CONFIG_HYSDN_CAPI + if((i = hycapi_capi_create(card))) { + printk(KERN_WARNING "HYSDN: failed to create capi-interface.\n"); + } +#endif /* CONFIG_HYSDN_CAPI */ + return (0); /* success */ + } /* data has arrived */ + sti(); + msleep_interruptible(50); /* Timeout 50ms */ + } /* wait until timeout */ + + if (card->debug_flags & LOG_POF_CARD) + hysdn_addlog(card, "ERGO: pof boot ready timeout"); + return (-ERR_POF_TIMEOUT); +} /* ergo_waitpofready */ + + + +/************************************************************************************/ +/* release the cards hardware. Before releasing do a interrupt disable and hardware */ +/* reset. Also unmap dpram. */ +/* Use only during module release. */ +/************************************************************************************/ +static void +ergo_releasehardware(hysdn_card * card) +{ + ergo_stopcard(card); /* first stop the card if not already done */ + free_irq(card->irq, card); /* release interrupt */ + release_region(card->iobase + PCI9050_INTR_REG, 1); /* release all io ports */ + release_region(card->iobase + PCI9050_USER_IO, 1); + vfree(card->dpram); + card->dpram = NULL; /* release shared mem */ +} /* ergo_releasehardware */ + + +/*********************************************************************************/ +/* acquire the needed hardware ports and map dpram. If an error occurs a nonzero */ +/* value is returned. */ +/* Use only during module init. */ +/*********************************************************************************/ +int +ergo_inithardware(hysdn_card * card) +{ + if (!request_region(card->iobase + PCI9050_INTR_REG, 1, "HYSDN")) + return (-1); + if (!request_region(card->iobase + PCI9050_USER_IO, 1, "HYSDN")) { + release_region(card->iobase + PCI9050_INTR_REG, 1); + return (-1); /* ports already in use */ + } + card->memend = card->membase + ERG_DPRAM_PAGE_SIZE - 1; + if (!(card->dpram = ioremap(card->membase, ERG_DPRAM_PAGE_SIZE))) { + release_region(card->iobase + PCI9050_INTR_REG, 1); + release_region(card->iobase + PCI9050_USER_IO, 1); + return (-1); + } + + ergo_stopcard(card); /* disable interrupts */ + if (request_irq(card->irq, ergo_interrupt, SA_SHIRQ, "HYSDN", card)) { + ergo_releasehardware(card); /* return the acquired hardware */ + return (-1); + } + /* success, now setup the function pointers */ + card->stopcard = ergo_stopcard; + card->releasehardware = ergo_releasehardware; + card->testram = ergo_testram; + card->writebootimg = ergo_writebootimg; + card->writebootseq = ergo_writebootseq; + card->waitpofready = ergo_waitpofready; + card->set_errlog_state = ergo_set_errlog_state; + INIT_WORK(&card->irq_queue, (void *) (void *) ergo_irq_bh, card); + + return (0); +} /* ergo_inithardware */ |