boardergo.c
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- /* $Id: boardergo.c,v 1.1.4.1 2001/11/20 14:19:37 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 <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 void
- 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; /* error -> spurious interrupt */
- if (!card->irq_enabled)
- return; /* 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; /* 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) {
- queue_task(&card->irq_queue, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
- }
- restore_flags(flags);
- } /* 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);
- queue_task(&card->irq_queue, &tq_immediate);
- mark_bh(IMMEDIATE_BH);
- } /* 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();
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout((20 * HZ) / 1000); /* 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();
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout((50 * HZ) / 1000); /* 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 (check_region(card->iobase + PCI9050_INTR_REG, 1) ||
- check_region(card->iobase + PCI9050_USER_IO, 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)))
- return (-1);
- request_region(card->iobase + PCI9050_INTR_REG, 1, "HYSDN");
- request_region(card->iobase + PCI9050_USER_IO, 1, "HYSDN");
- 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;
- card->irq_queue.sync = 0;
- card->irq_queue.data = card; /* init task queue for interrupt */
- card->irq_queue.routine = (void *) (void *) ergo_irq_bh;
- return (0);
- } /* ergo_inithardware */