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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/wan/pc300_drv.c
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Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/net/wan/pc300_drv.c')
-rw-r--r--drivers/net/wan/pc300_drv.c3692
1 files changed, 3692 insertions, 0 deletions
diff --git a/drivers/net/wan/pc300_drv.c b/drivers/net/wan/pc300_drv.c
new file mode 100644
index 0000000..d67be25
--- /dev/null
+++ b/drivers/net/wan/pc300_drv.c
@@ -0,0 +1,3692 @@
+#define USE_PCI_CLOCK
+static char rcsid[] =
+"Revision: 3.4.5 Date: 2002/03/07 ";
+
+/*
+ * pc300.c Cyclades-PC300(tm) Driver.
+ *
+ * Author: Ivan Passos <ivan@cyclades.com>
+ * Maintainer: PC300 Maintainer <pc300@cyclades.com>
+ *
+ * Copyright: (c) 1999-2003 Cyclades Corp.
+ *
+ * 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 of the License, or (at your option) any later version.
+ *
+ * Using tabstop = 4.
+ *
+ * $Log: pc300_drv.c,v $
+ * Revision 3.23 2002/03/20 13:58:40 henrique
+ * Fixed ortographic mistakes
+ *
+ * Revision 3.22 2002/03/13 16:56:56 henrique
+ * Take out the debug messages
+ *
+ * Revision 3.21 2002/03/07 14:17:09 henrique
+ * License data fixed
+ *
+ * Revision 3.20 2002/01/17 17:58:52 ivan
+ * Support for PC300-TE/M (PMC).
+ *
+ * Revision 3.19 2002/01/03 17:08:47 daniela
+ * Enables DMA reception when the SCA-II disables it improperly.
+ *
+ * Revision 3.18 2001/12/03 18:47:50 daniela
+ * Esthetic changes.
+ *
+ * Revision 3.17 2001/10/19 16:50:13 henrique
+ * Patch to kernel 2.4.12 and new generic hdlc.
+ *
+ * Revision 3.16 2001/10/16 15:12:31 regina
+ * clear statistics
+ *
+ * Revision 3.11 to 3.15 2001/10/11 20:26:04 daniela
+ * More DMA fixes for noisy lines.
+ * Return the size of bad frames in dma_get_rx_frame_size, so that the Rx buffer
+ * descriptors can be cleaned by dma_buf_read (called in cpc_net_rx).
+ * Renamed dma_start routine to rx_dma_start. Improved Rx statistics.
+ * Fixed BOF interrupt treatment. Created dma_start routine.
+ * Changed min and max to cpc_min and cpc_max.
+ *
+ * Revision 3.10 2001/08/06 12:01:51 regina
+ * Fixed problem in DSR_DE bit.
+ *
+ * Revision 3.9 2001/07/18 19:27:26 daniela
+ * Added some history comments.
+ *
+ * Revision 3.8 2001/07/12 13:11:19 regina
+ * bug fix - DCD-OFF in pc300 tty driver
+ *
+ * Revision 3.3 to 3.7 2001/07/06 15:00:20 daniela
+ * Removing kernel 2.4.3 and previous support.
+ * DMA transmission bug fix.
+ * MTU check in cpc_net_rx fixed.
+ * Boot messages reviewed.
+ * New configuration parameters (line code, CRC calculation and clock).
+ *
+ * Revision 3.2 2001/06/22 13:13:02 regina
+ * MLPPP implementation. Changed the header of message trace to include
+ * the device name. New format : "hdlcX[R/T]: ".
+ * Default configuration changed.
+ *
+ * Revision 3.1 2001/06/15 regina
+ * in cpc_queue_xmit, netif_stop_queue is called if don't have free descriptor
+ * upping major version number
+ *
+ * Revision 1.1.1.1 2001/06/13 20:25:04 daniela
+ * PC300 initial CVS version (3.4.0-pre1)
+ *
+ * Revision 3.0.1.2 2001/06/08 daniela
+ * Did some changes in the DMA programming implementation to avoid the
+ * occurrence of a SCA-II bug when CDA is accessed during a DMA transfer.
+ *
+ * Revision 3.0.1.1 2001/05/02 daniela
+ * Added kernel 2.4.3 support.
+ *
+ * Revision 3.0.1.0 2001/03/13 daniela, henrique
+ * Added Frame Relay Support.
+ * Driver now uses HDLC generic driver to provide protocol support.
+ *
+ * Revision 3.0.0.8 2001/03/02 daniela
+ * Fixed ram size detection.
+ * Changed SIOCGPC300CONF ioctl, to give hw information to pc300util.
+ *
+ * Revision 3.0.0.7 2001/02/23 daniela
+ * netif_stop_queue called before the SCA-II transmition commands in
+ * cpc_queue_xmit, and with interrupts disabled to avoid race conditions with
+ * transmition interrupts.
+ * Fixed falc_check_status for Unframed E1.
+ *
+ * Revision 3.0.0.6 2000/12/13 daniela
+ * Implemented pc300util support: trace, statistics, status and loopback
+ * tests for the PC300 TE boards.
+ *
+ * Revision 3.0.0.5 2000/12/12 ivan
+ * Added support for Unframed E1.
+ * Implemented monitor mode.
+ * Fixed DCD sensitivity on the second channel.
+ * Driver now complies with new PCI kernel architecture.
+ *
+ * Revision 3.0.0.4 2000/09/28 ivan
+ * Implemented DCD sensitivity.
+ * Moved hardware-specific open to the end of cpc_open, to avoid race
+ * conditions with early reception interrupts.
+ * Included code for [request|release]_mem_region().
+ * Changed location of pc300.h .
+ * Minor code revision (contrib. of Jeff Garzik).
+ *
+ * Revision 3.0.0.3 2000/07/03 ivan
+ * Previous bugfix for the framing errors with external clock made X21
+ * boards stop working. This version fixes it.
+ *
+ * Revision 3.0.0.2 2000/06/23 ivan
+ * Revisited cpc_queue_xmit to prevent race conditions on Tx DMA buffer
+ * handling when Tx timeouts occur.
+ * Revisited Rx statistics.
+ * Fixed a bug in the SCA-II programming that would cause framing errors
+ * when external clock was configured.
+ *
+ * Revision 3.0.0.1 2000/05/26 ivan
+ * Added logic in the SCA interrupt handler so that no board can monopolize
+ * the driver.
+ * Request PLX I/O region, although driver doesn't use it, to avoid
+ * problems with other drivers accessing it.
+ *
+ * Revision 3.0.0.0 2000/05/15 ivan
+ * Did some changes in the DMA programming implementation to avoid the
+ * occurrence of a SCA-II bug in the second channel.
+ * Implemented workaround for PLX9050 bug that would cause a system lockup
+ * in certain systems, depending on the MMIO addresses allocated to the
+ * board.
+ * Fixed the FALC chip programming to avoid synchronization problems in the
+ * second channel (TE only).
+ * Implemented a cleaner and faster Tx DMA descriptor cleanup procedure in
+ * cpc_queue_xmit().
+ * Changed the built-in driver implementation so that the driver can use the
+ * general 'hdlcN' naming convention instead of proprietary device names.
+ * Driver load messages are now device-centric, instead of board-centric.
+ * Dynamic allocation of net_device structures.
+ * Code is now compliant with the new module interface (module_[init|exit]).
+ * Make use of the PCI helper functions to access PCI resources.
+ *
+ * Revision 2.0.0.0 2000/04/15 ivan
+ * Added support for the PC300/TE boards (T1/FT1/E1/FE1).
+ *
+ * Revision 1.1.0.0 2000/02/28 ivan
+ * Major changes in the driver architecture.
+ * Softnet compliancy implemented.
+ * Driver now reports physical instead of virtual memory addresses.
+ * Added cpc_change_mtu function.
+ *
+ * Revision 1.0.0.0 1999/12/16 ivan
+ * First official release.
+ * Support for 1- and 2-channel boards (which use distinct PCI Device ID's).
+ * Support for monolythic installation (i.e., drv built into the kernel).
+ * X.25 additional checking when lapb_[dis]connect_request returns an error.
+ * SCA programming now covers X.21 as well.
+ *
+ * Revision 0.3.1.0 1999/11/18 ivan
+ * Made X.25 support configuration-dependent (as it depends on external
+ * modules to work).
+ * Changed X.25-specific function names to comply with adopted convention.
+ * Fixed typos in X.25 functions that would cause compile errors (Daniela).
+ * Fixed bug in ch_config that would disable interrupts on a previously
+ * enabled channel if the other channel on the same board was enabled later.
+ *
+ * Revision 0.3.0.0 1999/11/16 daniela
+ * X.25 support.
+ *
+ * Revision 0.2.3.0 1999/11/15 ivan
+ * Function cpc_ch_status now provides more detailed information.
+ * Added support for X.21 clock configuration.
+ * Changed TNR1 setting in order to prevent Tx FIFO overaccesses by the SCA.
+ * Now using PCI clock instead of internal oscillator clock for the SCA.
+ *
+ * Revision 0.2.2.0 1999/11/10 ivan
+ * Changed the *_dma_buf_check functions so that they would print only
+ * the useful info instead of the whole buffer descriptor bank.
+ * Fixed bug in cpc_queue_xmit that would eventually crash the system
+ * in case of a packet drop.
+ * Implemented TX underrun handling.
+ * Improved SCA fine tuning to boost up its performance.
+ *
+ * Revision 0.2.1.0 1999/11/03 ivan
+ * Added functions *dma_buf_pt_init to allow independent initialization
+ * of the next-descr. and DMA buffer pointers on the DMA descriptors.
+ * Kernel buffer release and tbusy clearing is now done in the interrupt
+ * handler.
+ * Fixed bug in cpc_open that would cause an interface reopen to fail.
+ * Added a protocol-specific code section in cpc_net_rx.
+ * Removed printk level defs (they might be added back after the beta phase).
+ *
+ * Revision 0.2.0.0 1999/10/28 ivan
+ * Revisited the code so that new protocols can be easily added / supported.
+ *
+ * Revision 0.1.0.1 1999/10/20 ivan
+ * Mostly "esthetic" changes.
+ *
+ * Revision 0.1.0.0 1999/10/11 ivan
+ * Initial version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/if.h>
+
+#include <net/syncppp.h>
+#include <net/arp.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include "pc300.h"
+
+#define CPC_LOCK(card,flags) \
+ do { \
+ spin_lock_irqsave(&card->card_lock, flags); \
+ } while (0)
+
+#define CPC_UNLOCK(card,flags) \
+ do { \
+ spin_unlock_irqrestore(&card->card_lock, flags); \
+ } while (0)
+
+#undef PC300_DEBUG_PCI
+#undef PC300_DEBUG_INTR
+#undef PC300_DEBUG_TX
+#undef PC300_DEBUG_RX
+#undef PC300_DEBUG_OTHER
+
+static struct pci_device_id cpc_pci_dev_id[] __devinitdata = {
+ /* PC300/RSV or PC300/X21, 2 chan */
+ {0x120e, 0x300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0x300},
+ /* PC300/RSV or PC300/X21, 1 chan */
+ {0x120e, 0x301, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0x301},
+ /* PC300/TE, 2 chan */
+ {0x120e, 0x310, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0x310},
+ /* PC300/TE, 1 chan */
+ {0x120e, 0x311, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0x311},
+ /* PC300/TE-M, 2 chan */
+ {0x120e, 0x320, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0x320},
+ /* PC300/TE-M, 1 chan */
+ {0x120e, 0x321, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0x321},
+ /* End of table */
+ {0,},
+};
+MODULE_DEVICE_TABLE(pci, cpc_pci_dev_id);
+
+#ifndef cpc_min
+#define cpc_min(a,b) (((a)<(b))?(a):(b))
+#endif
+#ifndef cpc_max
+#define cpc_max(a,b) (((a)>(b))?(a):(b))
+#endif
+
+/* prototypes */
+static void tx_dma_buf_pt_init(pc300_t *, int);
+static void tx_dma_buf_init(pc300_t *, int);
+static void rx_dma_buf_pt_init(pc300_t *, int);
+static void rx_dma_buf_init(pc300_t *, int);
+static void tx_dma_buf_check(pc300_t *, int);
+static void rx_dma_buf_check(pc300_t *, int);
+static irqreturn_t cpc_intr(int, void *, struct pt_regs *);
+static struct net_device_stats *cpc_get_stats(struct net_device *);
+static int clock_rate_calc(uclong, uclong, int *);
+static uclong detect_ram(pc300_t *);
+static void plx_init(pc300_t *);
+static void cpc_trace(struct net_device *, struct sk_buff *, char);
+static int cpc_attach(struct net_device *, unsigned short, unsigned short);
+
+#ifdef CONFIG_PC300_MLPPP
+void cpc_tty_init(pc300dev_t * dev);
+void cpc_tty_unregister_service(pc300dev_t * pc300dev);
+void cpc_tty_receive(pc300dev_t * pc300dev);
+void cpc_tty_trigger_poll(pc300dev_t * pc300dev);
+void cpc_tty_reset_var(void);
+#endif
+
+/************************/
+/*** DMA Routines ***/
+/************************/
+static void tx_dma_buf_pt_init(pc300_t * card, int ch)
+{
+ int i;
+ int ch_factor = ch * N_DMA_TX_BUF;
+ volatile pcsca_bd_t __iomem *ptdescr = (card->hw.rambase
+ + DMA_TX_BD_BASE + ch_factor * sizeof(pcsca_bd_t));
+
+ for (i = 0; i < N_DMA_TX_BUF; i++, ptdescr++) {
+ cpc_writel(&ptdescr->next, (uclong) (DMA_TX_BD_BASE +
+ (ch_factor + ((i + 1) & (N_DMA_TX_BUF - 1))) * sizeof(pcsca_bd_t)));
+ cpc_writel(&ptdescr->ptbuf,
+ (uclong) (DMA_TX_BASE + (ch_factor + i) * BD_DEF_LEN));
+ }
+}
+
+static void tx_dma_buf_init(pc300_t * card, int ch)
+{
+ int i;
+ int ch_factor = ch * N_DMA_TX_BUF;
+ volatile pcsca_bd_t __iomem *ptdescr = (card->hw.rambase
+ + DMA_TX_BD_BASE + ch_factor * sizeof(pcsca_bd_t));
+
+ for (i = 0; i < N_DMA_TX_BUF; i++, ptdescr++) {
+ memset_io(ptdescr, 0, sizeof(pcsca_bd_t));
+ cpc_writew(&ptdescr->len, 0);
+ cpc_writeb(&ptdescr->status, DST_OSB);
+ }
+ tx_dma_buf_pt_init(card, ch);
+}
+
+static void rx_dma_buf_pt_init(pc300_t * card, int ch)
+{
+ int i;
+ int ch_factor = ch * N_DMA_RX_BUF;
+ volatile pcsca_bd_t __iomem *ptdescr = (card->hw.rambase
+ + DMA_RX_BD_BASE + ch_factor * sizeof(pcsca_bd_t));
+
+ for (i = 0; i < N_DMA_RX_BUF; i++, ptdescr++) {
+ cpc_writel(&ptdescr->next, (uclong) (DMA_RX_BD_BASE +
+ (ch_factor + ((i + 1) & (N_DMA_RX_BUF - 1))) * sizeof(pcsca_bd_t)));
+ cpc_writel(&ptdescr->ptbuf,
+ (uclong) (DMA_RX_BASE + (ch_factor + i) * BD_DEF_LEN));
+ }
+}
+
+static void rx_dma_buf_init(pc300_t * card, int ch)
+{
+ int i;
+ int ch_factor = ch * N_DMA_RX_BUF;
+ volatile pcsca_bd_t __iomem *ptdescr = (card->hw.rambase
+ + DMA_RX_BD_BASE + ch_factor * sizeof(pcsca_bd_t));
+
+ for (i = 0; i < N_DMA_RX_BUF; i++, ptdescr++) {
+ memset_io(ptdescr, 0, sizeof(pcsca_bd_t));
+ cpc_writew(&ptdescr->len, 0);
+ cpc_writeb(&ptdescr->status, 0);
+ }
+ rx_dma_buf_pt_init(card, ch);
+}
+
+static void tx_dma_buf_check(pc300_t * card, int ch)
+{
+ volatile pcsca_bd_t __iomem *ptdescr;
+ int i;
+ ucshort first_bd = card->chan[ch].tx_first_bd;
+ ucshort next_bd = card->chan[ch].tx_next_bd;
+
+ printk("#CH%d: f_bd = %d(0x%08zx), n_bd = %d(0x%08zx)\n", ch,
+ first_bd, TX_BD_ADDR(ch, first_bd),
+ next_bd, TX_BD_ADDR(ch, next_bd));
+ for (i = first_bd,
+ ptdescr = (card->hw.rambase + TX_BD_ADDR(ch, first_bd));
+ i != ((next_bd + 1) & (N_DMA_TX_BUF - 1));
+ i = (i + 1) & (N_DMA_TX_BUF - 1),
+ ptdescr = (card->hw.rambase + TX_BD_ADDR(ch, i))) {
+ printk("\n CH%d TX%d: next=0x%x, ptbuf=0x%x, ST=0x%x, len=%d",
+ ch, i, cpc_readl(&ptdescr->next),
+ cpc_readl(&ptdescr->ptbuf),
+ cpc_readb(&ptdescr->status), cpc_readw(&ptdescr->len));
+ }
+ printk("\n");
+}
+
+#ifdef PC300_DEBUG_OTHER
+/* Show all TX buffer descriptors */
+static void tx1_dma_buf_check(pc300_t * card, int ch)
+{
+ volatile pcsca_bd_t __iomem *ptdescr;
+ int i;
+ ucshort first_bd = card->chan[ch].tx_first_bd;
+ ucshort next_bd = card->chan[ch].tx_next_bd;
+ uclong scabase = card->hw.scabase;
+
+ printk ("\nnfree_tx_bd = %d \n", card->chan[ch].nfree_tx_bd);
+ printk("#CH%d: f_bd = %d(0x%08x), n_bd = %d(0x%08x)\n", ch,
+ first_bd, TX_BD_ADDR(ch, first_bd),
+ next_bd, TX_BD_ADDR(ch, next_bd));
+ printk("TX_CDA=0x%08x, TX_EDA=0x%08x\n",
+ cpc_readl(scabase + DTX_REG(CDAL, ch)),
+ cpc_readl(scabase + DTX_REG(EDAL, ch)));
+ for (i = 0; i < N_DMA_TX_BUF; i++) {
+ ptdescr = (card->hw.rambase + TX_BD_ADDR(ch, i));
+ printk("\n CH%d TX%d: next=0x%x, ptbuf=0x%x, ST=0x%x, len=%d",
+ ch, i, cpc_readl(&ptdescr->next),
+ cpc_readl(&ptdescr->ptbuf),
+ cpc_readb(&ptdescr->status), cpc_readw(&ptdescr->len));
+ }
+ printk("\n");
+}
+#endif
+
+static void rx_dma_buf_check(pc300_t * card, int ch)
+{
+ volatile pcsca_bd_t __iomem *ptdescr;
+ int i;
+ ucshort first_bd = card->chan[ch].rx_first_bd;
+ ucshort last_bd = card->chan[ch].rx_last_bd;
+ int ch_factor;
+
+ ch_factor = ch * N_DMA_RX_BUF;
+ printk("#CH%d: f_bd = %d, l_bd = %d\n", ch, first_bd, last_bd);
+ for (i = 0, ptdescr = (card->hw.rambase +
+ DMA_RX_BD_BASE + ch_factor * sizeof(pcsca_bd_t));
+ i < N_DMA_RX_BUF; i++, ptdescr++) {
+ if (cpc_readb(&ptdescr->status) & DST_OSB)
+ printk ("\n CH%d RX%d: next=0x%x, ptbuf=0x%x, ST=0x%x, len=%d",
+ ch, i, cpc_readl(&ptdescr->next),
+ cpc_readl(&ptdescr->ptbuf),
+ cpc_readb(&ptdescr->status),
+ cpc_readw(&ptdescr->len));
+ }
+ printk("\n");
+}
+
+int dma_get_rx_frame_size(pc300_t * card, int ch)
+{
+ volatile pcsca_bd_t __iomem *ptdescr;
+ ucshort first_bd = card->chan[ch].rx_first_bd;
+ int rcvd = 0;
+ volatile ucchar status;
+
+ ptdescr = (card->hw.rambase + RX_BD_ADDR(ch, first_bd));
+ while ((status = cpc_readb(&ptdescr->status)) & DST_OSB) {
+ rcvd += cpc_readw(&ptdescr->len);
+ first_bd = (first_bd + 1) & (N_DMA_RX_BUF - 1);
+ if ((status & DST_EOM) || (first_bd == card->chan[ch].rx_last_bd)) {
+ /* Return the size of a good frame or incomplete bad frame
+ * (dma_buf_read will clean the buffer descriptors in this case). */
+ return (rcvd);
+ }
+ ptdescr = (card->hw.rambase + cpc_readl(&ptdescr->next));
+ }
+ return (-1);
+}
+
+/*
+ * dma_buf_write: writes a frame to the Tx DMA buffers
+ * NOTE: this function writes one frame at a time.
+ */
+int dma_buf_write(pc300_t * card, int ch, ucchar * ptdata, int len)
+{
+ int i, nchar;
+ volatile pcsca_bd_t __iomem *ptdescr;
+ int tosend = len;
+ ucchar nbuf = ((len - 1) / BD_DEF_LEN) + 1;
+
+ if (nbuf >= card->chan[ch].nfree_tx_bd) {
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < nbuf; i++) {
+ ptdescr = (card->hw.rambase +
+ TX_BD_ADDR(ch, card->chan[ch].tx_next_bd));
+ nchar = cpc_min(BD_DEF_LEN, tosend);
+ if (cpc_readb(&ptdescr->status) & DST_OSB) {
+ memcpy_toio((card->hw.rambase + cpc_readl(&ptdescr->ptbuf)),
+ &ptdata[len - tosend], nchar);
+ cpc_writew(&ptdescr->len, nchar);
+ card->chan[ch].nfree_tx_bd--;
+ if ((i + 1) == nbuf) {
+ /* This must be the last BD to be used */
+ cpc_writeb(&ptdescr->status, DST_EOM);
+ } else {
+ cpc_writeb(&ptdescr->status, 0);
+ }
+ } else {
+ return -ENOMEM;
+ }
+ tosend -= nchar;
+ card->chan[ch].tx_next_bd =
+ (card->chan[ch].tx_next_bd + 1) & (N_DMA_TX_BUF - 1);
+ }
+ /* If it gets to here, it means we have sent the whole frame */
+ return 0;
+}
+
+/*
+ * dma_buf_read: reads a frame from the Rx DMA buffers
+ * NOTE: this function reads one frame at a time.
+ */
+int dma_buf_read(pc300_t * card, int ch, struct sk_buff *skb)
+{
+ int nchar;
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ volatile pcsca_bd_t __iomem *ptdescr;
+ int rcvd = 0;
+ volatile ucchar status;
+
+ ptdescr = (card->hw.rambase +
+ RX_BD_ADDR(ch, chan->rx_first_bd));
+ while ((status = cpc_readb(&ptdescr->status)) & DST_OSB) {
+ nchar = cpc_readw(&ptdescr->len);
+ if ((status & (DST_OVR | DST_CRC | DST_RBIT | DST_SHRT | DST_ABT))
+ || (nchar > BD_DEF_LEN)) {
+
+ if (nchar > BD_DEF_LEN)
+ status |= DST_RBIT;
+ rcvd = -status;
+ /* Discard remaining descriptors used by the bad frame */
+ while (chan->rx_first_bd != chan->rx_last_bd) {
+ cpc_writeb(&ptdescr->status, 0);
+ chan->rx_first_bd = (chan->rx_first_bd+1) & (N_DMA_RX_BUF-1);
+ if (status & DST_EOM)
+ break;
+ ptdescr = (card->hw.rambase +
+ cpc_readl(&ptdescr->next));
+ status = cpc_readb(&ptdescr->status);
+ }
+ break;
+ }
+ if (nchar != 0) {
+ if (skb) {
+ memcpy_fromio(skb_put(skb, nchar),
+ (card->hw.rambase+cpc_readl(&ptdescr->ptbuf)),nchar);
+ }
+ rcvd += nchar;
+ }
+ cpc_writeb(&ptdescr->status, 0);
+ cpc_writeb(&ptdescr->len, 0);
+ chan->rx_first_bd = (chan->rx_first_bd + 1) & (N_DMA_RX_BUF - 1);
+
+ if (status & DST_EOM)
+ break;
+
+ ptdescr = (card->hw.rambase + cpc_readl(&ptdescr->next));
+ }
+
+ if (rcvd != 0) {
+ /* Update pointer */
+ chan->rx_last_bd = (chan->rx_first_bd - 1) & (N_DMA_RX_BUF - 1);
+ /* Update EDA */
+ cpc_writel(card->hw.scabase + DRX_REG(EDAL, ch),
+ RX_BD_ADDR(ch, chan->rx_last_bd));
+ }
+ return (rcvd);
+}
+
+void tx_dma_stop(pc300_t * card, int ch)
+{
+ void __iomem *scabase = card->hw.scabase;
+ ucchar drr_ena_bit = 1 << (5 + 2 * ch);
+ ucchar drr_rst_bit = 1 << (1 + 2 * ch);
+
+ /* Disable DMA */
+ cpc_writeb(scabase + DRR, drr_ena_bit);
+ cpc_writeb(scabase + DRR, drr_rst_bit & ~drr_ena_bit);
+}
+
+void rx_dma_stop(pc300_t * card, int ch)
+{
+ void __iomem *scabase = card->hw.scabase;
+ ucchar drr_ena_bit = 1 << (4 + 2 * ch);
+ ucchar drr_rst_bit = 1 << (2 * ch);
+
+ /* Disable DMA */
+ cpc_writeb(scabase + DRR, drr_ena_bit);
+ cpc_writeb(scabase + DRR, drr_rst_bit & ~drr_ena_bit);
+}
+
+void rx_dma_start(pc300_t * card, int ch)
+{
+ void __iomem *scabase = card->hw.scabase;
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+
+ /* Start DMA */
+ cpc_writel(scabase + DRX_REG(CDAL, ch),
+ RX_BD_ADDR(ch, chan->rx_first_bd));
+ if (cpc_readl(scabase + DRX_REG(CDAL,ch)) !=
+ RX_BD_ADDR(ch, chan->rx_first_bd)) {
+ cpc_writel(scabase + DRX_REG(CDAL, ch),
+ RX_BD_ADDR(ch, chan->rx_first_bd));
+ }
+ cpc_writel(scabase + DRX_REG(EDAL, ch),
+ RX_BD_ADDR(ch, chan->rx_last_bd));
+ cpc_writew(scabase + DRX_REG(BFLL, ch), BD_DEF_LEN);
+ cpc_writeb(scabase + DSR_RX(ch), DSR_DE);
+ if (!(cpc_readb(scabase + DSR_RX(ch)) & DSR_DE)) {
+ cpc_writeb(scabase + DSR_RX(ch), DSR_DE);
+ }
+}
+
+/*************************/
+/*** FALC Routines ***/
+/*************************/
+void falc_issue_cmd(pc300_t * card, int ch, ucchar cmd)
+{
+ void __iomem *falcbase = card->hw.falcbase;
+ unsigned long i = 0;
+
+ while (cpc_readb(falcbase + F_REG(SIS, ch)) & SIS_CEC) {
+ if (i++ >= PC300_FALC_MAXLOOP) {
+ printk("%s: FALC command locked(cmd=0x%x).\n",
+ card->chan[ch].d.name, cmd);
+ break;
+ }
+ }
+ cpc_writeb(falcbase + F_REG(CMDR, ch), cmd);
+}
+
+void falc_intr_enable(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ /* Interrupt pins are open-drain */
+ cpc_writeb(falcbase + F_REG(IPC, ch),
+ cpc_readb(falcbase + F_REG(IPC, ch)) & ~IPC_IC0);
+ /* Conters updated each second */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_ECM);
+ /* Enable SEC and ES interrupts */
+ cpc_writeb(falcbase + F_REG(IMR3, ch),
+ cpc_readb(falcbase + F_REG(IMR3, ch)) & ~(IMR3_SEC | IMR3_ES));
+ if (conf->fr_mode == PC300_FR_UNFRAMED) {
+ cpc_writeb(falcbase + F_REG(IMR4, ch),
+ cpc_readb(falcbase + F_REG(IMR4, ch)) & ~(IMR4_LOS));
+ } else {
+ cpc_writeb(falcbase + F_REG(IMR4, ch),
+ cpc_readb(falcbase + F_REG(IMR4, ch)) &
+ ~(IMR4_LFA | IMR4_AIS | IMR4_LOS | IMR4_SLIP));
+ }
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(IMR3, ch),
+ cpc_readb(falcbase + F_REG(IMR3, ch)) & ~IMR3_LLBSC);
+ } else {
+ cpc_writeb(falcbase + F_REG(IPC, ch),
+ cpc_readb(falcbase + F_REG(IPC, ch)) | IPC_SCI);
+ if (conf->fr_mode == PC300_FR_UNFRAMED) {
+ cpc_writeb(falcbase + F_REG(IMR2, ch),
+ cpc_readb(falcbase + F_REG(IMR2, ch)) & ~(IMR2_LOS));
+ } else {
+ cpc_writeb(falcbase + F_REG(IMR2, ch),
+ cpc_readb(falcbase + F_REG(IMR2, ch)) &
+ ~(IMR2_FAR | IMR2_LFA | IMR2_AIS | IMR2_LOS));
+ if (pfalc->multiframe_mode) {
+ cpc_writeb(falcbase + F_REG(IMR2, ch),
+ cpc_readb(falcbase + F_REG(IMR2, ch)) &
+ ~(IMR2_T400MS | IMR2_MFAR));
+ } else {
+ cpc_writeb(falcbase + F_REG(IMR2, ch),
+ cpc_readb(falcbase + F_REG(IMR2, ch)) |
+ IMR2_T400MS | IMR2_MFAR);
+ }
+ }
+ }
+}
+
+void falc_open_timeslot(pc300_t * card, int ch, int timeslot)
+{
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar tshf = card->chan[ch].falc.offset;
+
+ cpc_writeb(falcbase + F_REG((ICB1 + (timeslot - tshf) / 8), ch),
+ cpc_readb(falcbase + F_REG((ICB1 + (timeslot - tshf) / 8), ch)) &
+ ~(0x80 >> ((timeslot - tshf) & 0x07)));
+ cpc_writeb(falcbase + F_REG((TTR1 + timeslot / 8), ch),
+ cpc_readb(falcbase + F_REG((TTR1 + timeslot / 8), ch)) |
+ (0x80 >> (timeslot & 0x07)));
+ cpc_writeb(falcbase + F_REG((RTR1 + timeslot / 8), ch),
+ cpc_readb(falcbase + F_REG((RTR1 + timeslot / 8), ch)) |
+ (0x80 >> (timeslot & 0x07)));
+}
+
+void falc_close_timeslot(pc300_t * card, int ch, int timeslot)
+{
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar tshf = card->chan[ch].falc.offset;
+
+ cpc_writeb(falcbase + F_REG((ICB1 + (timeslot - tshf) / 8), ch),
+ cpc_readb(falcbase + F_REG((ICB1 + (timeslot - tshf) / 8), ch)) |
+ (0x80 >> ((timeslot - tshf) & 0x07)));
+ cpc_writeb(falcbase + F_REG((TTR1 + timeslot / 8), ch),
+ cpc_readb(falcbase + F_REG((TTR1 + timeslot / 8), ch)) &
+ ~(0x80 >> (timeslot & 0x07)));
+ cpc_writeb(falcbase + F_REG((RTR1 + timeslot / 8), ch),
+ cpc_readb(falcbase + F_REG((RTR1 + timeslot / 8), ch)) &
+ ~(0x80 >> (timeslot & 0x07)));
+}
+
+void falc_close_all_timeslots(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ cpc_writeb(falcbase + F_REG(ICB1, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(TTR1, ch), 0);
+ cpc_writeb(falcbase + F_REG(RTR1, ch), 0);
+ cpc_writeb(falcbase + F_REG(ICB2, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(TTR2, ch), 0);
+ cpc_writeb(falcbase + F_REG(RTR2, ch), 0);
+ cpc_writeb(falcbase + F_REG(ICB3, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(TTR3, ch), 0);
+ cpc_writeb(falcbase + F_REG(RTR3, ch), 0);
+ if (conf->media == IF_IFACE_E1) {
+ cpc_writeb(falcbase + F_REG(ICB4, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(TTR4, ch), 0);
+ cpc_writeb(falcbase + F_REG(RTR4, ch), 0);
+ }
+}
+
+void falc_open_all_timeslots(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ cpc_writeb(falcbase + F_REG(ICB1, ch), 0);
+ if (conf->fr_mode == PC300_FR_UNFRAMED) {
+ cpc_writeb(falcbase + F_REG(TTR1, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RTR1, ch), 0xff);
+ } else {
+ /* Timeslot 0 is never enabled */
+ cpc_writeb(falcbase + F_REG(TTR1, ch), 0x7f);
+ cpc_writeb(falcbase + F_REG(RTR1, ch), 0x7f);
+ }
+ cpc_writeb(falcbase + F_REG(ICB2, ch), 0);
+ cpc_writeb(falcbase + F_REG(TTR2, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RTR2, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(ICB3, ch), 0);
+ cpc_writeb(falcbase + F_REG(TTR3, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RTR3, ch), 0xff);
+ if (conf->media == IF_IFACE_E1) {
+ cpc_writeb(falcbase + F_REG(ICB4, ch), 0);
+ cpc_writeb(falcbase + F_REG(TTR4, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RTR4, ch), 0xff);
+ } else {
+ cpc_writeb(falcbase + F_REG(ICB4, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(TTR4, ch), 0x80);
+ cpc_writeb(falcbase + F_REG(RTR4, ch), 0x80);
+ }
+}
+
+void falc_init_timeslot(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ int tslot;
+
+ for (tslot = 0; tslot < pfalc->num_channels; tslot++) {
+ if (conf->tslot_bitmap & (1 << tslot)) {
+ // Channel enabled
+ falc_open_timeslot(card, ch, tslot + 1);
+ } else {
+ // Channel disabled
+ falc_close_timeslot(card, ch, tslot + 1);
+ }
+ }
+}
+
+void falc_enable_comm(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+
+ if (pfalc->full_bandwidth) {
+ falc_open_all_timeslots(card, ch);
+ } else {
+ falc_init_timeslot(card, ch);
+ }
+ // CTS/DCD ON
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) &
+ ~((CPLD_REG1_FALC_DCD | CPLD_REG1_FALC_CTS) << (2 * ch)));
+}
+
+void falc_disable_comm(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+
+ if (pfalc->loop_active != 2) {
+ falc_close_all_timeslots(card, ch);
+ }
+ // CTS/DCD OFF
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) |
+ ((CPLD_REG1_FALC_DCD | CPLD_REG1_FALC_CTS) << (2 * ch)));
+}
+
+void falc_init_t1(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar dja = (ch ? (LIM2_DJA2 | LIM2_DJA1) : 0);
+
+ /* Switch to T1 mode (PCM 24) */
+ cpc_writeb(falcbase + F_REG(FMR1, ch), FMR1_PMOD);
+
+ /* Wait 20 us for setup */
+ udelay(20);
+
+ /* Transmit Buffer Size (1 frame) */
+ cpc_writeb(falcbase + F_REG(SIC1, ch), SIC1_XBS0);
+
+ /* Clock mode */
+ if (conf->phys_settings.clock_type == CLOCK_INT) { /* Master mode */
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) | LIM0_MAS);
+ } else { /* Slave mode */
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) & ~LIM0_MAS);
+ cpc_writeb(falcbase + F_REG(LOOP, ch),
+ cpc_readb(falcbase + F_REG(LOOP, ch)) & ~LOOP_RTM);
+ }
+
+ cpc_writeb(falcbase + F_REG(IPC, ch), IPC_SCI);
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) &
+ ~(FMR0_XC0 | FMR0_XC1 | FMR0_RC0 | FMR0_RC1));
+
+ switch (conf->lcode) {
+ case PC300_LC_AMI:
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) |
+ FMR0_XC1 | FMR0_RC1);
+ /* Clear Channel register to ON for all channels */
+ cpc_writeb(falcbase + F_REG(CCB1, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(CCB2, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(CCB3, ch), 0xff);
+ break;
+
+ case PC300_LC_B8ZS:
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) |
+ FMR0_XC0 | FMR0_XC1 | FMR0_RC0 | FMR0_RC1);
+ break;
+
+ case PC300_LC_NRZ:
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) | 0x00);
+ break;
+ }
+
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) | LIM0_ELOS);
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) & ~(LIM0_SCL1 | LIM0_SCL0));
+ /* Set interface mode to 2 MBPS */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_IMOD);
+
+ switch (conf->fr_mode) {
+ case PC300_FR_ESF:
+ pfalc->multiframe_mode = 0;
+ cpc_writeb(falcbase + F_REG(FMR4, ch),
+ cpc_readb(falcbase + F_REG(FMR4, ch)) | FMR4_FM1);
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) |
+ FMR1_CRC | FMR1_EDL);
+ cpc_writeb(falcbase + F_REG(XDL1, ch), 0);
+ cpc_writeb(falcbase + F_REG(XDL2, ch), 0);
+ cpc_writeb(falcbase + F_REG(XDL3, ch), 0);
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) & ~FMR0_SRAF);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2,ch)) | FMR2_MCSP | FMR2_SSP);
+ break;
+
+ case PC300_FR_D4:
+ pfalc->multiframe_mode = 1;
+ cpc_writeb(falcbase + F_REG(FMR4, ch),
+ cpc_readb(falcbase + F_REG(FMR4, ch)) &
+ ~(FMR4_FM1 | FMR4_FM0));
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) | FMR0_SRAF);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) & ~FMR2_SSP);
+ break;
+ }
+
+ /* Enable Automatic Resynchronization */
+ cpc_writeb(falcbase + F_REG(FMR4, ch),
+ cpc_readb(falcbase + F_REG(FMR4, ch)) | FMR4_AUTO);
+
+ /* Transmit Automatic Remote Alarm */
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) | FMR2_AXRA);
+
+ /* Channel translation mode 1 : one to one */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_CTM);
+
+ /* No signaling */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) & ~FMR1_SIGM);
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) &
+ ~(FMR5_EIBR | FMR5_SRS));
+ cpc_writeb(falcbase + F_REG(CCR1, ch), 0);
+
+ cpc_writeb(falcbase + F_REG(LIM1, ch),
+ cpc_readb(falcbase + F_REG(LIM1, ch)) | LIM1_RIL0 | LIM1_RIL1);
+
+ switch (conf->lbo) {
+ /* Provides proper Line Build Out */
+ case PC300_LBO_0_DB:
+ cpc_writeb(falcbase + F_REG(LIM2, ch), (LIM2_LOS1 | dja));
+ cpc_writeb(falcbase + F_REG(XPM0, ch), 0x5a);
+ cpc_writeb(falcbase + F_REG(XPM1, ch), 0x8f);
+ cpc_writeb(falcbase + F_REG(XPM2, ch), 0x20);
+ break;
+ case PC300_LBO_7_5_DB:
+ cpc_writeb(falcbase + F_REG(LIM2, ch), (0x40 | LIM2_LOS1 | dja));
+ cpc_writeb(falcbase + F_REG(XPM0, ch), 0x11);
+ cpc_writeb(falcbase + F_REG(XPM1, ch), 0x02);
+ cpc_writeb(falcbase + F_REG(XPM2, ch), 0x20);
+ break;
+ case PC300_LBO_15_DB:
+ cpc_writeb(falcbase + F_REG(LIM2, ch), (0x80 | LIM2_LOS1 | dja));
+ cpc_writeb(falcbase + F_REG(XPM0, ch), 0x8e);
+ cpc_writeb(falcbase + F_REG(XPM1, ch), 0x01);
+ cpc_writeb(falcbase + F_REG(XPM2, ch), 0x20);
+ break;
+ case PC300_LBO_22_5_DB:
+ cpc_writeb(falcbase + F_REG(LIM2, ch), (0xc0 | LIM2_LOS1 | dja));
+ cpc_writeb(falcbase + F_REG(XPM0, ch), 0x09);
+ cpc_writeb(falcbase + F_REG(XPM1, ch), 0x01);
+ cpc_writeb(falcbase + F_REG(XPM2, ch), 0x20);
+ break;
+ }
+
+ /* Transmit Clock-Slot Offset */
+ cpc_writeb(falcbase + F_REG(XC0, ch),
+ cpc_readb(falcbase + F_REG(XC0, ch)) | 0x01);
+ /* Transmit Time-slot Offset */
+ cpc_writeb(falcbase + F_REG(XC1, ch), 0x3e);
+ /* Receive Clock-Slot offset */
+ cpc_writeb(falcbase + F_REG(RC0, ch), 0x05);
+ /* Receive Time-slot offset */
+ cpc_writeb(falcbase + F_REG(RC1, ch), 0x00);
+
+ /* LOS Detection after 176 consecutive 0s */
+ cpc_writeb(falcbase + F_REG(PCDR, ch), 0x0a);
+ /* LOS Recovery after 22 ones in the time window of PCD */
+ cpc_writeb(falcbase + F_REG(PCRR, ch), 0x15);
+
+ cpc_writeb(falcbase + F_REG(IDLE, ch), 0x7f);
+
+ if (conf->fr_mode == PC300_FR_ESF_JAPAN) {
+ cpc_writeb(falcbase + F_REG(RC1, ch),
+ cpc_readb(falcbase + F_REG(RC1, ch)) | 0x80);
+ }
+
+ falc_close_all_timeslots(card, ch);
+}
+
+void falc_init_e1(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar dja = (ch ? (LIM2_DJA2 | LIM2_DJA1) : 0);
+
+ /* Switch to E1 mode (PCM 30) */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) & ~FMR1_PMOD);
+
+ /* Clock mode */
+ if (conf->phys_settings.clock_type == CLOCK_INT) { /* Master mode */
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) | LIM0_MAS);
+ } else { /* Slave mode */
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) & ~LIM0_MAS);
+ }
+ cpc_writeb(falcbase + F_REG(LOOP, ch),
+ cpc_readb(falcbase + F_REG(LOOP, ch)) & ~LOOP_SFM);
+
+ cpc_writeb(falcbase + F_REG(IPC, ch), IPC_SCI);
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) &
+ ~(FMR0_XC0 | FMR0_XC1 | FMR0_RC0 | FMR0_RC1));
+
+ switch (conf->lcode) {
+ case PC300_LC_AMI:
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) |
+ FMR0_XC1 | FMR0_RC1);
+ break;
+
+ case PC300_LC_HDB3:
+ cpc_writeb(falcbase + F_REG(FMR0, ch),
+ cpc_readb(falcbase + F_REG(FMR0, ch)) |
+ FMR0_XC0 | FMR0_XC1 | FMR0_RC0 | FMR0_RC1);
+ break;
+
+ case PC300_LC_NRZ:
+ break;
+ }
+
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) & ~(LIM0_SCL1 | LIM0_SCL0));
+ /* Set interface mode to 2 MBPS */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_IMOD);
+
+ cpc_writeb(falcbase + F_REG(XPM0, ch), 0x18);
+ cpc_writeb(falcbase + F_REG(XPM1, ch), 0x03);
+ cpc_writeb(falcbase + F_REG(XPM2, ch), 0x00);
+
+ switch (conf->fr_mode) {
+ case PC300_FR_MF_CRC4:
+ pfalc->multiframe_mode = 1;
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_XFS);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) | FMR2_RFS1);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) & ~FMR2_RFS0);
+ cpc_writeb(falcbase + F_REG(FMR3, ch),
+ cpc_readb(falcbase + F_REG(FMR3, ch)) & ~FMR3_EXTIW);
+
+ /* MultiFrame Resynchronization */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_MFCS);
+
+ /* Automatic Loss of Multiframe > 914 CRC errors */
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) | FMR2_ALMF);
+
+ /* S1 and SI1/SI2 spare Bits set to 1 */
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch)) & ~XSP_AXS);
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch)) | XSP_EBP);
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch)) | XSP_XS13 | XSP_XS15);
+
+ /* Automatic Force Resynchronization */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_AFR);
+
+ /* Transmit Automatic Remote Alarm */
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) | FMR2_AXRA);
+
+ /* Transmit Spare Bits for National Use (Y, Sn, Sa) */
+ cpc_writeb(falcbase + F_REG(XSW, ch),
+ cpc_readb(falcbase + F_REG(XSW, ch)) |
+ XSW_XY0 | XSW_XY1 | XSW_XY2 | XSW_XY3 | XSW_XY4);
+ break;
+
+ case PC300_FR_MF_NON_CRC4:
+ case PC300_FR_D4:
+ pfalc->multiframe_mode = 0;
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) & ~FMR1_XFS);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) &
+ ~(FMR2_RFS1 | FMR2_RFS0));
+ cpc_writeb(falcbase + F_REG(XSW, ch),
+ cpc_readb(falcbase + F_REG(XSW, ch)) | XSW_XSIS);
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch)) | XSP_XSIF);
+
+ /* Automatic Force Resynchronization */
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) | FMR1_AFR);
+
+ /* Transmit Automatic Remote Alarm */
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) | FMR2_AXRA);
+
+ /* Transmit Spare Bits for National Use (Y, Sn, Sa) */
+ cpc_writeb(falcbase + F_REG(XSW, ch),
+ cpc_readb(falcbase + F_REG(XSW, ch)) |
+ XSW_XY0 | XSW_XY1 | XSW_XY2 | XSW_XY3 | XSW_XY4);
+ break;
+
+ case PC300_FR_UNFRAMED:
+ pfalc->multiframe_mode = 0;
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) & ~FMR1_XFS);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) &
+ ~(FMR2_RFS1 | FMR2_RFS0));
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch)) | XSP_TT0);
+ cpc_writeb(falcbase + F_REG(XSW, ch),
+ cpc_readb(falcbase + F_REG(XSW, ch)) &
+ ~(XSW_XTM|XSW_XY0|XSW_XY1|XSW_XY2|XSW_XY3|XSW_XY4));
+ cpc_writeb(falcbase + F_REG(TSWM, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) |
+ (FMR2_RTM | FMR2_DAIS));
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) & ~FMR2_AXRA);
+ cpc_writeb(falcbase + F_REG(FMR1, ch),
+ cpc_readb(falcbase + F_REG(FMR1, ch)) & ~FMR1_AFR);
+ pfalc->sync = 1;
+ cpc_writeb(falcbase + card->hw.cpld_reg2,
+ cpc_readb(falcbase + card->hw.cpld_reg2) |
+ (CPLD_REG2_FALC_LED2 << (2 * ch)));
+ break;
+ }
+
+ /* No signaling */
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch)) & ~XSP_CASEN);
+ cpc_writeb(falcbase + F_REG(CCR1, ch), 0);
+
+ cpc_writeb(falcbase + F_REG(LIM1, ch),
+ cpc_readb(falcbase + F_REG(LIM1, ch)) | LIM1_RIL0 | LIM1_RIL1);
+ cpc_writeb(falcbase + F_REG(LIM2, ch), (LIM2_LOS1 | dja));
+
+ /* Transmit Clock-Slot Offset */
+ cpc_writeb(falcbase + F_REG(XC0, ch),
+ cpc_readb(falcbase + F_REG(XC0, ch)) | 0x01);
+ /* Transmit Time-slot Offset */
+ cpc_writeb(falcbase + F_REG(XC1, ch), 0x3e);
+ /* Receive Clock-Slot offset */
+ cpc_writeb(falcbase + F_REG(RC0, ch), 0x05);
+ /* Receive Time-slot offset */
+ cpc_writeb(falcbase + F_REG(RC1, ch), 0x00);
+
+ /* LOS Detection after 176 consecutive 0s */
+ cpc_writeb(falcbase + F_REG(PCDR, ch), 0x0a);
+ /* LOS Recovery after 22 ones in the time window of PCD */
+ cpc_writeb(falcbase + F_REG(PCRR, ch), 0x15);
+
+ cpc_writeb(falcbase + F_REG(IDLE, ch), 0x7f);
+
+ falc_close_all_timeslots(card, ch);
+}
+
+void falc_init_hdlc(pc300_t * card, int ch)
+{
+ void __iomem *falcbase = card->hw.falcbase;
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+
+ /* Enable transparent data transfer */
+ if (conf->fr_mode == PC300_FR_UNFRAMED) {
+ cpc_writeb(falcbase + F_REG(MODE, ch), 0);
+ } else {
+ cpc_writeb(falcbase + F_REG(MODE, ch),
+ cpc_readb(falcbase + F_REG(MODE, ch)) |
+ (MODE_HRAC | MODE_MDS2));
+ cpc_writeb(falcbase + F_REG(RAH2, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RAH1, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RAL2, ch), 0xff);
+ cpc_writeb(falcbase + F_REG(RAL1, ch), 0xff);
+ }
+
+ /* Tx/Rx reset */
+ falc_issue_cmd(card, ch, CMDR_RRES | CMDR_XRES | CMDR_SRES);
+
+ /* Enable interrupt sources */
+ falc_intr_enable(card, ch);
+}
+
+void te_config(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar dummy;
+ unsigned long flags;
+
+ memset(pfalc, 0, sizeof(falc_t));
+ switch (conf->media) {
+ case IF_IFACE_T1:
+ pfalc->num_channels = NUM_OF_T1_CHANNELS;
+ pfalc->offset = 1;
+ break;
+ case IF_IFACE_E1:
+ pfalc->num_channels = NUM_OF_E1_CHANNELS;
+ pfalc->offset = 0;
+ break;
+ }
+ if (conf->tslot_bitmap == 0xffffffffUL)
+ pfalc->full_bandwidth = 1;
+ else
+ pfalc->full_bandwidth = 0;
+
+ CPC_LOCK(card, flags);
+ /* Reset the FALC chip */
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) |
+ (CPLD_REG1_FALC_RESET << (2 * ch)));
+ udelay(10000);
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) &
+ ~(CPLD_REG1_FALC_RESET << (2 * ch)));
+
+ if (conf->media == IF_IFACE_T1) {
+ falc_init_t1(card, ch);
+ } else {
+ falc_init_e1(card, ch);
+ }
+ falc_init_hdlc(card, ch);
+ if (conf->rx_sens == PC300_RX_SENS_SH) {
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) & ~LIM0_EQON);
+ } else {
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) | LIM0_EQON);
+ }
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) |
+ ((CPLD_REG2_FALC_TX_CLK | CPLD_REG2_FALC_RX_CLK) << (2 * ch)));
+
+ /* Clear all interrupt registers */
+ dummy = cpc_readb(falcbase + F_REG(FISR0, ch)) +
+ cpc_readb(falcbase + F_REG(FISR1, ch)) +
+ cpc_readb(falcbase + F_REG(FISR2, ch)) +
+ cpc_readb(falcbase + F_REG(FISR3, ch));
+ CPC_UNLOCK(card, flags);
+}
+
+void falc_check_status(pc300_t * card, int ch, unsigned char frs0)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ /* Verify LOS */
+ if (frs0 & FRS0_LOS) {
+ if (!pfalc->red_alarm) {
+ pfalc->red_alarm = 1;
+ pfalc->los++;
+ if (!pfalc->blue_alarm) {
+ // EVENT_FALC_ABNORMAL
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise interfere
+ * with other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch))
+ | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_FALC_ABNORMAL
+ }
+ }
+ } else {
+ if (pfalc->red_alarm) {
+ pfalc->red_alarm = 0;
+ pfalc->losr++;
+ }
+ }
+
+ if (conf->fr_mode != PC300_FR_UNFRAMED) {
+ /* Verify AIS alarm */
+ if (frs0 & FRS0_AIS) {
+ if (!pfalc->blue_alarm) {
+ pfalc->blue_alarm = 1;
+ pfalc->ais++;
+ // EVENT_AIS
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise interfere with other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch)) | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_AIS
+ }
+ } else {
+ pfalc->blue_alarm = 0;
+ }
+
+ /* Verify LFA */
+ if (frs0 & FRS0_LFA) {
+ if (!pfalc->loss_fa) {
+ pfalc->loss_fa = 1;
+ pfalc->lfa++;
+ if (!pfalc->blue_alarm && !pfalc->red_alarm) {
+ // EVENT_FALC_ABNORMAL
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise
+ * interfere with other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch))
+ | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_FALC_ABNORMAL
+ }
+ }
+ } else {
+ if (pfalc->loss_fa) {
+ pfalc->loss_fa = 0;
+ pfalc->farec++;
+ }
+ }
+
+ /* Verify LMFA */
+ if (pfalc->multiframe_mode && (frs0 & FRS0_LMFA)) {
+ /* D4 or CRC4 frame mode */
+ if (!pfalc->loss_mfa) {
+ pfalc->loss_mfa = 1;
+ pfalc->lmfa++;
+ if (!pfalc->blue_alarm && !pfalc->red_alarm &&
+ !pfalc->loss_fa) {
+ // EVENT_FALC_ABNORMAL
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise
+ * interfere with other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch))
+ | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_FALC_ABNORMAL
+ }
+ }
+ } else {
+ pfalc->loss_mfa = 0;
+ }
+
+ /* Verify Remote Alarm */
+ if (frs0 & FRS0_RRA) {
+ if (!pfalc->yellow_alarm) {
+ pfalc->yellow_alarm = 1;
+ pfalc->rai++;
+ if (pfalc->sync) {
+ // EVENT_RAI
+ falc_disable_comm(card, ch);
+ // EVENT_RAI
+ }
+ }
+ } else {
+ pfalc->yellow_alarm = 0;
+ }
+ } /* if !PC300_UNFRAMED */
+
+ if (pfalc->red_alarm || pfalc->loss_fa ||
+ pfalc->loss_mfa || pfalc->blue_alarm) {
+ if (pfalc->sync) {
+ pfalc->sync = 0;
+ chan->d.line_off++;
+ cpc_writeb(falcbase + card->hw.cpld_reg2,
+ cpc_readb(falcbase + card->hw.cpld_reg2) &
+ ~(CPLD_REG2_FALC_LED2 << (2 * ch)));
+ }
+ } else {
+ if (!pfalc->sync) {
+ pfalc->sync = 1;
+ chan->d.line_on++;
+ cpc_writeb(falcbase + card->hw.cpld_reg2,
+ cpc_readb(falcbase + card->hw.cpld_reg2) |
+ (CPLD_REG2_FALC_LED2 << (2 * ch)));
+ }
+ }
+
+ if (pfalc->sync && !pfalc->yellow_alarm) {
+ if (!pfalc->active) {
+ // EVENT_FALC_NORMAL
+ if (pfalc->loop_active) {
+ return;
+ }
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch)) & ~IMR0_PDEN);
+ }
+ falc_enable_comm(card, ch);
+ // EVENT_FALC_NORMAL
+ pfalc->active = 1;
+ }
+ } else {
+ if (pfalc->active) {
+ pfalc->active = 0;
+ }
+ }
+}
+
+void falc_update_stats(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+ ucshort counter;
+
+ counter = cpc_readb(falcbase + F_REG(FECL, ch));
+ counter |= cpc_readb(falcbase + F_REG(FECH, ch)) << 8;
+ pfalc->fec += counter;
+
+ counter = cpc_readb(falcbase + F_REG(CVCL, ch));
+ counter |= cpc_readb(falcbase + F_REG(CVCH, ch)) << 8;
+ pfalc->cvc += counter;
+
+ counter = cpc_readb(falcbase + F_REG(CECL, ch));
+ counter |= cpc_readb(falcbase + F_REG(CECH, ch)) << 8;
+ pfalc->cec += counter;
+
+ counter = cpc_readb(falcbase + F_REG(EBCL, ch));
+ counter |= cpc_readb(falcbase + F_REG(EBCH, ch)) << 8;
+ pfalc->ebc += counter;
+
+ if (cpc_readb(falcbase + F_REG(LCR1, ch)) & LCR1_EPRM) {
+ mdelay(10);
+ counter = cpc_readb(falcbase + F_REG(BECL, ch));
+ counter |= cpc_readb(falcbase + F_REG(BECH, ch)) << 8;
+ pfalc->bec += counter;
+
+ if (((conf->media == IF_IFACE_T1) &&
+ (cpc_readb(falcbase + F_REG(FRS1, ch)) & FRS1_LLBAD) &&
+ (!(cpc_readb(falcbase + F_REG(FRS1, ch)) & FRS1_PDEN)))
+ ||
+ ((conf->media == IF_IFACE_E1) &&
+ (cpc_readb(falcbase + F_REG(RSP, ch)) & RSP_LLBAD))) {
+ pfalc->prbs = 2;
+ } else {
+ pfalc->prbs = 1;
+ }
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * falc_remote_loop
+ *----------------------------------------------------------------------------
+ * Description: In the remote loopback mode the clock and data recovered
+ * from the line inputs RL1/2 or RDIP/RDIN are routed back
+ * to the line outputs XL1/2 or XDOP/XDON via the analog
+ * transmitter. As in normal mode they are processsed by
+ * the synchronizer and then sent to the system interface.
+ *----------------------------------------------------------------------------
+ */
+void falc_remote_loop(pc300_t * card, int ch, int loop_on)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (loop_on) {
+ // EVENT_FALC_ABNORMAL
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise interfere with
+ * other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch)) | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_FALC_ABNORMAL
+ cpc_writeb(falcbase + F_REG(LIM1, ch),
+ cpc_readb(falcbase + F_REG(LIM1, ch)) | LIM1_RL);
+ pfalc->loop_active = 1;
+ } else {
+ cpc_writeb(falcbase + F_REG(LIM1, ch),
+ cpc_readb(falcbase + F_REG(LIM1, ch)) & ~LIM1_RL);
+ pfalc->sync = 0;
+ cpc_writeb(falcbase + card->hw.cpld_reg2,
+ cpc_readb(falcbase + card->hw.cpld_reg2) &
+ ~(CPLD_REG2_FALC_LED2 << (2 * ch)));
+ pfalc->active = 0;
+ falc_issue_cmd(card, ch, CMDR_XRES);
+ pfalc->loop_active = 0;
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * falc_local_loop
+ *----------------------------------------------------------------------------
+ * Description: The local loopback mode disconnects the receive lines
+ * RL1/RL2 resp. RDIP/RDIN from the receiver. Instead of the
+ * signals coming from the line the data provided by system
+ * interface are routed through the analog receiver back to
+ * the system interface. The unipolar bit stream will be
+ * undisturbed transmitted on the line. Receiver and transmitter
+ * coding must be identical.
+ *----------------------------------------------------------------------------
+ */
+void falc_local_loop(pc300_t * card, int ch, int loop_on)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (loop_on) {
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) | LIM0_LL);
+ pfalc->loop_active = 1;
+ } else {
+ cpc_writeb(falcbase + F_REG(LIM0, ch),
+ cpc_readb(falcbase + F_REG(LIM0, ch)) & ~LIM0_LL);
+ pfalc->loop_active = 0;
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * falc_payload_loop
+ *----------------------------------------------------------------------------
+ * Description: This routine allows to enable/disable payload loopback.
+ * When the payload loop is activated, the received 192 bits
+ * of payload data will be looped back to the transmit
+ * direction. The framing bits, CRC6 and DL bits are not
+ * looped. They are originated by the FALC-LH transmitter.
+ *----------------------------------------------------------------------------
+ */
+void falc_payload_loop(pc300_t * card, int ch, int loop_on)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (loop_on) {
+ // EVENT_FALC_ABNORMAL
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise interfere with
+ * other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch)) | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_FALC_ABNORMAL
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) | FMR2_PLB);
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(FMR4, ch),
+ cpc_readb(falcbase + F_REG(FMR4, ch)) | FMR4_TM);
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) | XSP_TT0);
+ }
+ falc_open_all_timeslots(card, ch);
+ pfalc->loop_active = 2;
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR2, ch),
+ cpc_readb(falcbase + F_REG(FMR2, ch)) & ~FMR2_PLB);
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(FMR4, ch),
+ cpc_readb(falcbase + F_REG(FMR4, ch)) & ~FMR4_TM);
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) & ~XSP_TT0);
+ }
+ pfalc->sync = 0;
+ cpc_writeb(falcbase + card->hw.cpld_reg2,
+ cpc_readb(falcbase + card->hw.cpld_reg2) &
+ ~(CPLD_REG2_FALC_LED2 << (2 * ch)));
+ pfalc->active = 0;
+ falc_issue_cmd(card, ch, CMDR_XRES);
+ pfalc->loop_active = 0;
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * turn_off_xlu
+ *----------------------------------------------------------------------------
+ * Description: Turns XLU bit off in the proper register
+ *----------------------------------------------------------------------------
+ */
+void turn_off_xlu(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) & ~FMR5_XLU);
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR3, ch),
+ cpc_readb(falcbase + F_REG(FMR3, ch)) & ~FMR3_XLU);
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * turn_off_xld
+ *----------------------------------------------------------------------------
+ * Description: Turns XLD bit off in the proper register
+ *----------------------------------------------------------------------------
+ */
+void turn_off_xld(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) & ~FMR5_XLD);
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR3, ch),
+ cpc_readb(falcbase + F_REG(FMR3, ch)) & ~FMR3_XLD);
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * falc_generate_loop_up_code
+ *----------------------------------------------------------------------------
+ * Description: This routine writes the proper FALC chip register in order
+ * to generate a LOOP activation code over a T1/E1 line.
+ *----------------------------------------------------------------------------
+ */
+void falc_generate_loop_up_code(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) | FMR5_XLU);
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR3, ch),
+ cpc_readb(falcbase + F_REG(FMR3, ch)) | FMR3_XLU);
+ }
+ // EVENT_FALC_ABNORMAL
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable this interrupt as it may otherwise interfere with
+ * other working boards. */
+ cpc_writeb(falcbase + F_REG(IMR0, ch),
+ cpc_readb(falcbase + F_REG(IMR0, ch)) | IMR0_PDEN);
+ }
+ falc_disable_comm(card, ch);
+ // EVENT_FALC_ABNORMAL
+ pfalc->loop_gen = 1;
+}
+
+/*----------------------------------------------------------------------------
+ * falc_generate_loop_down_code
+ *----------------------------------------------------------------------------
+ * Description: This routine writes the proper FALC chip register in order
+ * to generate a LOOP deactivation code over a T1/E1 line.
+ *----------------------------------------------------------------------------
+ */
+void falc_generate_loop_down_code(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (conf->media == IF_IFACE_T1) {
+ cpc_writeb(falcbase + F_REG(FMR5, ch),
+ cpc_readb(falcbase + F_REG(FMR5, ch)) | FMR5_XLD);
+ } else {
+ cpc_writeb(falcbase + F_REG(FMR3, ch),
+ cpc_readb(falcbase + F_REG(FMR3, ch)) | FMR3_XLD);
+ }
+ pfalc->sync = 0;
+ cpc_writeb(falcbase + card->hw.cpld_reg2,
+ cpc_readb(falcbase + card->hw.cpld_reg2) &
+ ~(CPLD_REG2_FALC_LED2 << (2 * ch)));
+ pfalc->active = 0;
+//? falc_issue_cmd(card, ch, CMDR_XRES);
+ pfalc->loop_gen = 0;
+}
+
+/*----------------------------------------------------------------------------
+ * falc_pattern_test
+ *----------------------------------------------------------------------------
+ * Description: This routine generates a pattern code and checks
+ * it on the reception side.
+ *----------------------------------------------------------------------------
+ */
+void falc_pattern_test(pc300_t * card, int ch, unsigned int activate)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (activate) {
+ pfalc->prbs = 1;
+ pfalc->bec = 0;
+ if (conf->media == IF_IFACE_T1) {
+ /* Disable local loop activation/deactivation detect */
+ cpc_writeb(falcbase + F_REG(IMR3, ch),
+ cpc_readb(falcbase + F_REG(IMR3, ch)) | IMR3_LLBSC);
+ } else {
+ /* Disable local loop activation/deactivation detect */
+ cpc_writeb(falcbase + F_REG(IMR1, ch),
+ cpc_readb(falcbase + F_REG(IMR1, ch)) | IMR1_LLBSC);
+ }
+ /* Activates generation and monitoring of PRBS
+ * (Pseudo Random Bit Sequence) */
+ cpc_writeb(falcbase + F_REG(LCR1, ch),
+ cpc_readb(falcbase + F_REG(LCR1, ch)) | LCR1_EPRM | LCR1_XPRBS);
+ } else {
+ pfalc->prbs = 0;
+ /* Deactivates generation and monitoring of PRBS
+ * (Pseudo Random Bit Sequence) */
+ cpc_writeb(falcbase + F_REG(LCR1, ch),
+ cpc_readb(falcbase+F_REG(LCR1,ch)) & ~(LCR1_EPRM | LCR1_XPRBS));
+ if (conf->media == IF_IFACE_T1) {
+ /* Enable local loop activation/deactivation detect */
+ cpc_writeb(falcbase + F_REG(IMR3, ch),
+ cpc_readb(falcbase + F_REG(IMR3, ch)) & ~IMR3_LLBSC);
+ } else {
+ /* Enable local loop activation/deactivation detect */
+ cpc_writeb(falcbase + F_REG(IMR1, ch),
+ cpc_readb(falcbase + F_REG(IMR1, ch)) & ~IMR1_LLBSC);
+ }
+ }
+}
+
+/*----------------------------------------------------------------------------
+ * falc_pattern_test_error
+ *----------------------------------------------------------------------------
+ * Description: This routine returns the bit error counter value
+ *----------------------------------------------------------------------------
+ */
+ucshort falc_pattern_test_error(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+
+ return (pfalc->bec);
+}
+
+/**********************************/
+/*** Net Interface Routines ***/
+/**********************************/
+
+static void
+cpc_trace(struct net_device *dev, struct sk_buff *skb_main, char rx_tx)
+{
+ struct sk_buff *skb;
+
+ if ((skb = dev_alloc_skb(10 + skb_main->len)) == NULL) {
+ printk("%s: out of memory\n", dev->name);
+ return;
+ }
+ skb_put(skb, 10 + skb_main->len);
+
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_CUST);
+ skb->mac.raw = skb->data;
+ skb->pkt_type = PACKET_HOST;
+ skb->len = 10 + skb_main->len;
+
+ memcpy(skb->data, dev->name, 5);
+ skb->data[5] = '[';
+ skb->data[6] = rx_tx;
+ skb->data[7] = ']';
+ skb->data[8] = ':';
+ skb->data[9] = ' ';
+ memcpy(&skb->data[10], skb_main->data, skb_main->len);
+
+ netif_rx(skb);
+}
+
+void cpc_tx_timeout(struct net_device *dev)
+{
+ pc300dev_t *d = (pc300dev_t *) dev->priv;
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ struct net_device_stats *stats = hdlc_stats(dev);
+ int ch = chan->channel;
+ unsigned long flags;
+ ucchar ilar;
+
+ stats->tx_errors++;
+ stats->tx_aborted_errors++;
+ CPC_LOCK(card, flags);
+ if ((ilar = cpc_readb(card->hw.scabase + ILAR)) != 0) {
+ printk("%s: ILAR=0x%x\n", dev->name, ilar);
+ cpc_writeb(card->hw.scabase + ILAR, ilar);
+ cpc_writeb(card->hw.scabase + DMER, 0x80);
+ }
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) &
+ ~(CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+ dev->trans_start = jiffies;
+ CPC_UNLOCK(card, flags);
+ netif_wake_queue(dev);
+}
+
+int cpc_queue_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ pc300dev_t *d = (pc300dev_t *) dev->priv;
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ struct net_device_stats *stats = hdlc_stats(dev);
+ int ch = chan->channel;
+ unsigned long flags;
+#ifdef PC300_DEBUG_TX
+ int i;
+#endif
+
+ if (chan->conf.monitor) {
+ /* In monitor mode no Tx is done: ignore packet */
+ dev_kfree_skb(skb);
+ return 0;
+ } else if (!netif_carrier_ok(dev)) {
+ /* DCD must be OFF: drop packet */
+ dev_kfree_skb(skb);
+ stats->tx_errors++;
+ stats->tx_carrier_errors++;
+ return 0;
+ } else if (cpc_readb(card->hw.scabase + M_REG(ST3, ch)) & ST3_DCD) {
+ printk("%s: DCD is OFF. Going administrative down.\n", dev->name);
+ stats->tx_errors++;
+ stats->tx_carrier_errors++;
+ dev_kfree_skb(skb);
+ netif_carrier_off(dev);
+ CPC_LOCK(card, flags);
+ cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_TX_BUF_CLR);
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) &
+ ~(CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+ CPC_UNLOCK(card, flags);
+ netif_wake_queue(dev);
+ return 0;
+ }
+
+ /* Write buffer to DMA buffers */
+ if (dma_buf_write(card, ch, (ucchar *) skb->data, skb->len) != 0) {
+// printk("%s: write error. Dropping TX packet.\n", dev->name);
+ netif_stop_queue(dev);
+ dev_kfree_skb(skb);
+ stats->tx_errors++;
+ stats->tx_dropped++;
+ return 0;
+ }
+#ifdef PC300_DEBUG_TX
+ printk("%s T:", dev->name);
+ for (i = 0; i < skb->len; i++)
+ printk(" %02x", *(skb->data + i));
+ printk("\n");
+#endif
+
+ if (d->trace_on) {
+ cpc_trace(dev, skb, 'T');
+ }
+ dev->trans_start = jiffies;
+
+ /* Start transmission */
+ CPC_LOCK(card, flags);
+ /* verify if it has more than one free descriptor */
+ if (card->chan[ch].nfree_tx_bd <= 1) {
+ /* don't have so stop the queue */
+ netif_stop_queue(dev);
+ }
+ cpc_writel(card->hw.scabase + DTX_REG(EDAL, ch),
+ TX_BD_ADDR(ch, chan->tx_next_bd));
+ cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_TX_ENA);
+ cpc_writeb(card->hw.scabase + DSR_TX(ch), DSR_DE);
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) |
+ (CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+ CPC_UNLOCK(card, flags);
+ dev_kfree_skb(skb);
+
+ return 0;
+}
+
+void cpc_net_rx(struct net_device *dev)
+{
+ pc300dev_t *d = (pc300dev_t *) dev->priv;
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ struct net_device_stats *stats = hdlc_stats(dev);
+ int ch = chan->channel;
+#ifdef PC300_DEBUG_RX
+ int i;
+#endif
+ int rxb;
+ struct sk_buff *skb;
+
+ while (1) {
+ if ((rxb = dma_get_rx_frame_size(card, ch)) == -1)
+ return;
+
+ if (!netif_carrier_ok(dev)) {
+ /* DCD must be OFF: drop packet */
+ printk("%s : DCD is OFF - drop %d rx bytes\n", dev->name, rxb);
+ skb = NULL;
+ } else {
+ if (rxb > (dev->mtu + 40)) { /* add headers */
+ printk("%s : MTU exceeded %d\n", dev->name, rxb);
+ skb = NULL;
+ } else {
+ skb = dev_alloc_skb(rxb);
+ if (skb == NULL) {
+ printk("%s: Memory squeeze!!\n", dev->name);
+ return;
+ }
+ skb->dev = dev;
+ }
+ }
+
+ if (((rxb = dma_buf_read(card, ch, skb)) <= 0) || (skb == NULL)) {
+#ifdef PC300_DEBUG_RX
+ printk("%s: rxb = %x\n", dev->name, rxb);
+#endif
+ if ((skb == NULL) && (rxb > 0)) {
+ /* rxb > dev->mtu */
+ stats->rx_errors++;
+ stats->rx_length_errors++;
+ continue;
+ }
+
+ if (rxb < 0) { /* Invalid frame */
+ rxb = -rxb;
+ if (rxb & DST_OVR) {
+ stats->rx_errors++;
+ stats->rx_fifo_errors++;
+ }
+ if (rxb & DST_CRC) {
+ stats->rx_errors++;
+ stats->rx_crc_errors++;
+ }
+ if (rxb & (DST_RBIT | DST_SHRT | DST_ABT)) {
+ stats->rx_errors++;
+ stats->rx_frame_errors++;
+ }
+ }
+ if (skb) {
+ dev_kfree_skb_irq(skb);
+ }
+ continue;
+ }
+
+ stats->rx_bytes += rxb;
+
+#ifdef PC300_DEBUG_RX
+ printk("%s R:", dev->name);
+ for (i = 0; i < skb->len; i++)
+ printk(" %02x", *(skb->data + i));
+ printk("\n");
+#endif
+ if (d->trace_on) {
+ cpc_trace(dev, skb, 'R');
+ }
+ stats->rx_packets++;
+ skb->protocol = hdlc_type_trans(skb, dev);
+ netif_rx(skb);
+ }
+}
+
+/************************************/
+/*** PC300 Interrupt Routines ***/
+/************************************/
+static void sca_tx_intr(pc300dev_t *dev)
+{
+ pc300ch_t *chan = (pc300ch_t *)dev->chan;
+ pc300_t *card = (pc300_t *)chan->card;
+ int ch = chan->channel;
+ volatile pcsca_bd_t __iomem * ptdescr;
+ struct net_device_stats *stats = hdlc_stats(dev->dev);
+
+ /* Clean up descriptors from previous transmission */
+ ptdescr = (card->hw.rambase +
+ TX_BD_ADDR(ch,chan->tx_first_bd));
+ while ((cpc_readl(card->hw.scabase + DTX_REG(CDAL,ch)) !=
+ TX_BD_ADDR(ch,chan->tx_first_bd)) &&
+ (cpc_readb(&ptdescr->status) & DST_OSB)) {
+ stats->tx_packets++;
+ stats->tx_bytes += cpc_readw(&ptdescr->len);
+ cpc_writeb(&ptdescr->status, DST_OSB);
+ cpc_writew(&ptdescr->len, 0);
+ chan->nfree_tx_bd++;
+ chan->tx_first_bd = (chan->tx_first_bd + 1) & (N_DMA_TX_BUF - 1);
+ ptdescr = (card->hw.rambase + TX_BD_ADDR(ch,chan->tx_first_bd));
+ }
+
+#ifdef CONFIG_PC300_MLPPP
+ if (chan->conf.proto == PC300_PROTO_MLPPP) {
+ cpc_tty_trigger_poll(dev);
+ } else {
+#endif
+ /* Tell the upper layer we are ready to transmit more packets */
+ netif_wake_queue(dev->dev);
+#ifdef CONFIG_PC300_MLPPP
+ }
+#endif
+}
+
+static void sca_intr(pc300_t * card)
+{
+ void __iomem *scabase = card->hw.scabase;
+ volatile uclong status;
+ int ch;
+ int intr_count = 0;
+ unsigned char dsr_rx;
+
+ while ((status = cpc_readl(scabase + ISR0)) != 0) {
+ for (ch = 0; ch < card->hw.nchan; ch++) {
+ pc300ch_t *chan = &card->chan[ch];
+ pc300dev_t *d = &chan->d;
+ struct net_device *dev = d->dev;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ spin_lock(&card->card_lock);
+
+ /**** Reception ****/
+ if (status & IR0_DRX((IR0_DMIA | IR0_DMIB), ch)) {
+ ucchar drx_stat = cpc_readb(scabase + DSR_RX(ch));
+
+ /* Clear RX interrupts */
+ cpc_writeb(scabase + DSR_RX(ch), drx_stat | DSR_DWE);
+
+#ifdef PC300_DEBUG_INTR
+ printk ("sca_intr: RX intr chan[%d] (st=0x%08lx, dsr=0x%02x)\n",
+ ch, status, drx_stat);
+#endif
+ if (status & IR0_DRX(IR0_DMIA, ch)) {
+ if (drx_stat & DSR_BOF) {
+#ifdef CONFIG_PC300_MLPPP
+ if (chan->conf.proto == PC300_PROTO_MLPPP) {
+ /* verify if driver is TTY */
+ if ((cpc_readb(scabase + DSR_RX(ch)) & DSR_DE)) {
+ rx_dma_stop(card, ch);
+ }
+ cpc_tty_receive(d);
+ rx_dma_start(card, ch);
+ } else
+#endif
+ {
+ if ((cpc_readb(scabase + DSR_RX(ch)) & DSR_DE)) {
+ rx_dma_stop(card, ch);
+ }
+ cpc_net_rx(dev);
+ /* Discard invalid frames */
+ hdlc->stats.rx_errors++;
+ hdlc->stats.rx_over_errors++;
+ chan->rx_first_bd = 0;
+ chan->rx_last_bd = N_DMA_RX_BUF - 1;
+ rx_dma_start(card, ch);
+ }
+ }
+ }
+ if (status & IR0_DRX(IR0_DMIB, ch)) {
+ if (drx_stat & DSR_EOM) {
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase +
+ card->hw.cpld_reg2,
+ cpc_readb (card->hw.falcbase +
+ card->hw.cpld_reg2) |
+ (CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+#ifdef CONFIG_PC300_MLPPP
+ if (chan->conf.proto == PC300_PROTO_MLPPP) {
+ /* verify if driver is TTY */
+ cpc_tty_receive(d);
+ } else {
+ cpc_net_rx(dev);
+ }
+#else
+ cpc_net_rx(dev);
+#endif
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase +
+ card->hw.cpld_reg2,
+ cpc_readb (card->hw.falcbase +
+ card->hw.cpld_reg2) &
+ ~ (CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+ }
+ }
+ if (!(dsr_rx = cpc_readb(scabase + DSR_RX(ch)) & DSR_DE)) {
+#ifdef PC300_DEBUG_INTR
+ printk("%s: RX intr chan[%d] (st=0x%08lx, dsr=0x%02x, dsr2=0x%02x)\n",
+ dev->name, ch, status, drx_stat, dsr_rx);
+#endif
+ cpc_writeb(scabase + DSR_RX(ch), (dsr_rx | DSR_DE) & 0xfe);
+ }
+ }
+
+ /**** Transmission ****/
+ if (status & IR0_DTX((IR0_EFT | IR0_DMIA | IR0_DMIB), ch)) {
+ ucchar dtx_stat = cpc_readb(scabase + DSR_TX(ch));
+
+ /* Clear TX interrupts */
+ cpc_writeb(scabase + DSR_TX(ch), dtx_stat | DSR_DWE);
+
+#ifdef PC300_DEBUG_INTR
+ printk ("sca_intr: TX intr chan[%d] (st=0x%08lx, dsr=0x%02x)\n",
+ ch, status, dtx_stat);
+#endif
+ if (status & IR0_DTX(IR0_EFT, ch)) {
+ if (dtx_stat & DSR_UDRF) {
+ if (cpc_readb (scabase + M_REG(TBN, ch)) != 0) {
+ cpc_writeb(scabase + M_REG(CMD,ch), CMD_TX_BUF_CLR);
+ }
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb (card->hw.falcbase +
+ card->hw.cpld_reg2) &
+ ~ (CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+ hdlc->stats.tx_errors++;
+ hdlc->stats.tx_fifo_errors++;
+ sca_tx_intr(d);
+ }
+ }
+ if (status & IR0_DTX(IR0_DMIA, ch)) {
+ if (dtx_stat & DSR_BOF) {
+ }
+ }
+ if (status & IR0_DTX(IR0_DMIB, ch)) {
+ if (dtx_stat & DSR_EOM) {
+ if (card->hw.type == PC300_TE) {
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb (card->hw.falcbase +
+ card->hw.cpld_reg2) &
+ ~ (CPLD_REG2_FALC_LED1 << (2 * ch)));
+ }
+ sca_tx_intr(d);
+ }
+ }
+ }
+
+ /**** MSCI ****/
+ if (status & IR0_M(IR0_RXINTA, ch)) {
+ ucchar st1 = cpc_readb(scabase + M_REG(ST1, ch));
+
+ /* Clear MSCI interrupts */
+ cpc_writeb(scabase + M_REG(ST1, ch), st1);
+
+#ifdef PC300_DEBUG_INTR
+ printk("sca_intr: MSCI intr chan[%d] (st=0x%08lx, st1=0x%02x)\n",
+ ch, status, st1);
+#endif
+ if (st1 & ST1_CDCD) { /* DCD changed */
+ if (cpc_readb(scabase + M_REG(ST3, ch)) & ST3_DCD) {
+ printk ("%s: DCD is OFF. Going administrative down.\n",
+ dev->name);
+#ifdef CONFIG_PC300_MLPPP
+ if (chan->conf.proto != PC300_PROTO_MLPPP) {
+ netif_carrier_off(dev);
+ }
+#else
+ netif_carrier_off(dev);
+
+#endif
+ card->chan[ch].d.line_off++;
+ } else { /* DCD = 1 */
+ printk ("%s: DCD is ON. Going administrative up.\n",
+ dev->name);
+#ifdef CONFIG_PC300_MLPPP
+ if (chan->conf.proto != PC300_PROTO_MLPPP)
+ /* verify if driver is not TTY */
+#endif
+ netif_carrier_on(dev);
+ card->chan[ch].d.line_on++;
+ }
+ }
+ }
+ spin_unlock(&card->card_lock);
+ }
+ if (++intr_count == 10)
+ /* Too much work at this board. Force exit */
+ break;
+ }
+}
+
+static void falc_t1_loop_detection(pc300_t * card, int ch, ucchar frs1)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (((cpc_readb(falcbase + F_REG(LCR1, ch)) & LCR1_XPRBS) == 0) &&
+ !pfalc->loop_gen) {
+ if (frs1 & FRS1_LLBDD) {
+ // A Line Loop Back Deactivation signal detected
+ if (pfalc->loop_active) {
+ falc_remote_loop(card, ch, 0);
+ }
+ } else {
+ if ((frs1 & FRS1_LLBAD) &&
+ ((cpc_readb(falcbase + F_REG(LCR1, ch)) & LCR1_EPRM) == 0)) {
+ // A Line Loop Back Activation signal detected
+ if (!pfalc->loop_active) {
+ falc_remote_loop(card, ch, 1);
+ }
+ }
+ }
+ }
+}
+
+static void falc_e1_loop_detection(pc300_t * card, int ch, ucchar rsp)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+
+ if (((cpc_readb(falcbase + F_REG(LCR1, ch)) & LCR1_XPRBS) == 0) &&
+ !pfalc->loop_gen) {
+ if (rsp & RSP_LLBDD) {
+ // A Line Loop Back Deactivation signal detected
+ if (pfalc->loop_active) {
+ falc_remote_loop(card, ch, 0);
+ }
+ } else {
+ if ((rsp & RSP_LLBAD) &&
+ ((cpc_readb(falcbase + F_REG(LCR1, ch)) & LCR1_EPRM) == 0)) {
+ // A Line Loop Back Activation signal detected
+ if (!pfalc->loop_active) {
+ falc_remote_loop(card, ch, 1);
+ }
+ }
+ }
+ }
+}
+
+static void falc_t1_intr(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar isr0, isr3, gis;
+ ucchar dummy;
+
+ while ((gis = cpc_readb(falcbase + F_REG(GIS, ch))) != 0) {
+ if (gis & GIS_ISR0) {
+ isr0 = cpc_readb(falcbase + F_REG(FISR0, ch));
+ if (isr0 & FISR0_PDEN) {
+ /* Read the bit to clear the situation */
+ if (cpc_readb(falcbase + F_REG(FRS1, ch)) &
+ FRS1_PDEN) {
+ pfalc->pden++;
+ }
+ }
+ }
+
+ if (gis & GIS_ISR1) {
+ dummy = cpc_readb(falcbase + F_REG(FISR1, ch));
+ }
+
+ if (gis & GIS_ISR2) {
+ dummy = cpc_readb(falcbase + F_REG(FISR2, ch));
+ }
+
+ if (gis & GIS_ISR3) {
+ isr3 = cpc_readb(falcbase + F_REG(FISR3, ch));
+ if (isr3 & FISR3_SEC) {
+ pfalc->sec++;
+ falc_update_stats(card, ch);
+ falc_check_status(card, ch,
+ cpc_readb(falcbase + F_REG(FRS0, ch)));
+ }
+ if (isr3 & FISR3_ES) {
+ pfalc->es++;
+ }
+ if (isr3 & FISR3_LLBSC) {
+ falc_t1_loop_detection(card, ch,
+ cpc_readb(falcbase + F_REG(FRS1, ch)));
+ }
+ }
+ }
+}
+
+static void falc_e1_intr(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = (pc300ch_t *) & card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ void __iomem *falcbase = card->hw.falcbase;
+ ucchar isr1, isr2, isr3, gis, rsp;
+ ucchar dummy;
+
+ while ((gis = cpc_readb(falcbase + F_REG(GIS, ch))) != 0) {
+ rsp = cpc_readb(falcbase + F_REG(RSP, ch));
+
+ if (gis & GIS_ISR0) {
+ dummy = cpc_readb(falcbase + F_REG(FISR0, ch));
+ }
+ if (gis & GIS_ISR1) {
+ isr1 = cpc_readb(falcbase + F_REG(FISR1, ch));
+ if (isr1 & FISR1_XMB) {
+ if ((pfalc->xmb_cause & 2)
+ && pfalc->multiframe_mode) {
+ if (cpc_readb (falcbase + F_REG(FRS0, ch)) &
+ (FRS0_LOS | FRS0_AIS | FRS0_LFA)) {
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch))
+ & ~XSP_AXS);
+ } else {
+ cpc_writeb(falcbase + F_REG(XSP, ch),
+ cpc_readb(falcbase + F_REG(XSP, ch))
+ | XSP_AXS);
+ }
+ }
+ pfalc->xmb_cause = 0;
+ cpc_writeb(falcbase + F_REG(IMR1, ch),
+ cpc_readb(falcbase + F_REG(IMR1, ch)) | IMR1_XMB);
+ }
+ if (isr1 & FISR1_LLBSC) {
+ falc_e1_loop_detection(card, ch, rsp);
+ }
+ }
+ if (gis & GIS_ISR2) {
+ isr2 = cpc_readb(falcbase + F_REG(FISR2, ch));
+ if (isr2 & FISR2_T400MS) {
+ cpc_writeb(falcbase + F_REG(XSW, ch),
+ cpc_readb(falcbase + F_REG(XSW, ch)) | XSW_XRA);
+ }
+ if (isr2 & FISR2_MFAR) {
+ cpc_writeb(falcbase + F_REG(XSW, ch),
+ cpc_readb(falcbase + F_REG(XSW, ch)) & ~XSW_XRA);
+ }
+ if (isr2 & (FISR2_FAR | FISR2_LFA | FISR2_AIS | FISR2_LOS)) {
+ pfalc->xmb_cause |= 2;
+ cpc_writeb(falcbase + F_REG(IMR1, ch),
+ cpc_readb(falcbase + F_REG(IMR1, ch)) & ~IMR1_XMB);
+ }
+ }
+ if (gis & GIS_ISR3) {
+ isr3 = cpc_readb(falcbase + F_REG(FISR3, ch));
+ if (isr3 & FISR3_SEC) {
+ pfalc->sec++;
+ falc_update_stats(card, ch);
+ falc_check_status(card, ch,
+ cpc_readb(falcbase + F_REG(FRS0, ch)));
+ }
+ if (isr3 & FISR3_ES) {
+ pfalc->es++;
+ }
+ }
+ }
+}
+
+static void falc_intr(pc300_t * card)
+{
+ int ch;
+
+ for (ch = 0; ch < card->hw.nchan; ch++) {
+ pc300ch_t *chan = &card->chan[ch];
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+
+ if (conf->media == IF_IFACE_T1) {
+ falc_t1_intr(card, ch);
+ } else {
+ falc_e1_intr(card, ch);
+ }
+ }
+}
+
+static irqreturn_t cpc_intr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ pc300_t *card;
+ volatile ucchar plx_status;
+
+ if ((card = (pc300_t *) dev_id) == 0) {
+#ifdef PC300_DEBUG_INTR
+ printk("cpc_intr: spurious intr %d\n", irq);
+#endif
+ return IRQ_NONE; /* spurious intr */
+ }
+
+ if (card->hw.rambase == 0) {
+#ifdef PC300_DEBUG_INTR
+ printk("cpc_intr: spurious intr2 %d\n", irq);
+#endif
+ return IRQ_NONE; /* spurious intr */
+ }
+
+ switch (card->hw.type) {
+ case PC300_RSV:
+ case PC300_X21:
+ sca_intr(card);
+ break;
+
+ case PC300_TE:
+ while ( (plx_status = (cpc_readb(card->hw.plxbase + card->hw.intctl_reg) &
+ (PLX_9050_LINT1_STATUS | PLX_9050_LINT2_STATUS))) != 0) {
+ if (plx_status & PLX_9050_LINT1_STATUS) { /* SCA Interrupt */
+ sca_intr(card);
+ }
+ if (plx_status & PLX_9050_LINT2_STATUS) { /* FALC Interrupt */
+ falc_intr(card);
+ }
+ }
+ break;
+ }
+ return IRQ_HANDLED;
+}
+
+void cpc_sca_status(pc300_t * card, int ch)
+{
+ ucchar ilar;
+ void __iomem *scabase = card->hw.scabase;
+ unsigned long flags;
+
+ tx_dma_buf_check(card, ch);
+ rx_dma_buf_check(card, ch);
+ ilar = cpc_readb(scabase + ILAR);
+ printk ("ILAR=0x%02x, WCRL=0x%02x, PCR=0x%02x, BTCR=0x%02x, BOLR=0x%02x\n",
+ ilar, cpc_readb(scabase + WCRL), cpc_readb(scabase + PCR),
+ cpc_readb(scabase + BTCR), cpc_readb(scabase + BOLR));
+ printk("TX_CDA=0x%08x, TX_EDA=0x%08x\n",
+ cpc_readl(scabase + DTX_REG(CDAL, ch)),
+ cpc_readl(scabase + DTX_REG(EDAL, ch)));
+ printk("RX_CDA=0x%08x, RX_EDA=0x%08x, BFL=0x%04x\n",
+ cpc_readl(scabase + DRX_REG(CDAL, ch)),
+ cpc_readl(scabase + DRX_REG(EDAL, ch)),
+ cpc_readw(scabase + DRX_REG(BFLL, ch)));
+ printk("DMER=0x%02x, DSR_TX=0x%02x, DSR_RX=0x%02x\n",
+ cpc_readb(scabase + DMER), cpc_readb(scabase + DSR_TX(ch)),
+ cpc_readb(scabase + DSR_RX(ch)));
+ printk("DMR_TX=0x%02x, DMR_RX=0x%02x, DIR_TX=0x%02x, DIR_RX=0x%02x\n",
+ cpc_readb(scabase + DMR_TX(ch)), cpc_readb(scabase + DMR_RX(ch)),
+ cpc_readb(scabase + DIR_TX(ch)),
+ cpc_readb(scabase + DIR_RX(ch)));
+ printk("DCR_TX=0x%02x, DCR_RX=0x%02x, FCT_TX=0x%02x, FCT_RX=0x%02x\n",
+ cpc_readb(scabase + DCR_TX(ch)), cpc_readb(scabase + DCR_RX(ch)),
+ cpc_readb(scabase + FCT_TX(ch)),
+ cpc_readb(scabase + FCT_RX(ch)));
+ printk("MD0=0x%02x, MD1=0x%02x, MD2=0x%02x, MD3=0x%02x, IDL=0x%02x\n",
+ cpc_readb(scabase + M_REG(MD0, ch)),
+ cpc_readb(scabase + M_REG(MD1, ch)),
+ cpc_readb(scabase + M_REG(MD2, ch)),
+ cpc_readb(scabase + M_REG(MD3, ch)),
+ cpc_readb(scabase + M_REG(IDL, ch)));
+ printk("CMD=0x%02x, SA0=0x%02x, SA1=0x%02x, TFN=0x%02x, CTL=0x%02x\n",
+ cpc_readb(scabase + M_REG(CMD, ch)),
+ cpc_readb(scabase + M_REG(SA0, ch)),
+ cpc_readb(scabase + M_REG(SA1, ch)),
+ cpc_readb(scabase + M_REG(TFN, ch)),
+ cpc_readb(scabase + M_REG(CTL, ch)));
+ printk("ST0=0x%02x, ST1=0x%02x, ST2=0x%02x, ST3=0x%02x, ST4=0x%02x\n",
+ cpc_readb(scabase + M_REG(ST0, ch)),
+ cpc_readb(scabase + M_REG(ST1, ch)),
+ cpc_readb(scabase + M_REG(ST2, ch)),
+ cpc_readb(scabase + M_REG(ST3, ch)),
+ cpc_readb(scabase + M_REG(ST4, ch)));
+ printk ("CST0=0x%02x, CST1=0x%02x, CST2=0x%02x, CST3=0x%02x, FST=0x%02x\n",
+ cpc_readb(scabase + M_REG(CST0, ch)),
+ cpc_readb(scabase + M_REG(CST1, ch)),
+ cpc_readb(scabase + M_REG(CST2, ch)),
+ cpc_readb(scabase + M_REG(CST3, ch)),
+ cpc_readb(scabase + M_REG(FST, ch)));
+ printk("TRC0=0x%02x, TRC1=0x%02x, RRC=0x%02x, TBN=0x%02x, RBN=0x%02x\n",
+ cpc_readb(scabase + M_REG(TRC0, ch)),
+ cpc_readb(scabase + M_REG(TRC1, ch)),
+ cpc_readb(scabase + M_REG(RRC, ch)),
+ cpc_readb(scabase + M_REG(TBN, ch)),
+ cpc_readb(scabase + M_REG(RBN, ch)));
+ printk("TFS=0x%02x, TNR0=0x%02x, TNR1=0x%02x, RNR=0x%02x\n",
+ cpc_readb(scabase + M_REG(TFS, ch)),
+ cpc_readb(scabase + M_REG(TNR0, ch)),
+ cpc_readb(scabase + M_REG(TNR1, ch)),
+ cpc_readb(scabase + M_REG(RNR, ch)));
+ printk("TCR=0x%02x, RCR=0x%02x, TNR1=0x%02x, RNR=0x%02x\n",
+ cpc_readb(scabase + M_REG(TCR, ch)),
+ cpc_readb(scabase + M_REG(RCR, ch)),
+ cpc_readb(scabase + M_REG(TNR1, ch)),
+ cpc_readb(scabase + M_REG(RNR, ch)));
+ printk("TXS=0x%02x, RXS=0x%02x, EXS=0x%02x, TMCT=0x%02x, TMCR=0x%02x\n",
+ cpc_readb(scabase + M_REG(TXS, ch)),
+ cpc_readb(scabase + M_REG(RXS, ch)),
+ cpc_readb(scabase + M_REG(EXS, ch)),
+ cpc_readb(scabase + M_REG(TMCT, ch)),
+ cpc_readb(scabase + M_REG(TMCR, ch)));
+ printk("IE0=0x%02x, IE1=0x%02x, IE2=0x%02x, IE4=0x%02x, FIE=0x%02x\n",
+ cpc_readb(scabase + M_REG(IE0, ch)),
+ cpc_readb(scabase + M_REG(IE1, ch)),
+ cpc_readb(scabase + M_REG(IE2, ch)),
+ cpc_readb(scabase + M_REG(IE4, ch)),
+ cpc_readb(scabase + M_REG(FIE, ch)));
+ printk("IER0=0x%08x\n", cpc_readl(scabase + IER0));
+
+ if (ilar != 0) {
+ CPC_LOCK(card, flags);
+ cpc_writeb(scabase + ILAR, ilar);
+ cpc_writeb(scabase + DMER, 0x80);
+ CPC_UNLOCK(card, flags);
+ }
+}
+
+void cpc_falc_status(pc300_t * card, int ch)
+{
+ pc300ch_t *chan = &card->chan[ch];
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ unsigned long flags;
+
+ CPC_LOCK(card, flags);
+ printk("CH%d: %s %s %d channels\n",
+ ch, (pfalc->sync ? "SYNC" : ""), (pfalc->active ? "ACTIVE" : ""),
+ pfalc->num_channels);
+
+ printk(" pden=%d, los=%d, losr=%d, lfa=%d, farec=%d\n",
+ pfalc->pden, pfalc->los, pfalc->losr, pfalc->lfa, pfalc->farec);
+ printk(" lmfa=%d, ais=%d, sec=%d, es=%d, rai=%d\n",
+ pfalc->lmfa, pfalc->ais, pfalc->sec, pfalc->es, pfalc->rai);
+ printk(" bec=%d, fec=%d, cvc=%d, cec=%d, ebc=%d\n",
+ pfalc->bec, pfalc->fec, pfalc->cvc, pfalc->cec, pfalc->ebc);
+
+ printk("\n");
+ printk(" STATUS: %s %s %s %s %s %s\n",
+ (pfalc->red_alarm ? "RED" : ""),
+ (pfalc->blue_alarm ? "BLU" : ""),
+ (pfalc->yellow_alarm ? "YEL" : ""),
+ (pfalc->loss_fa ? "LFA" : ""),
+ (pfalc->loss_mfa ? "LMF" : ""), (pfalc->prbs ? "PRB" : ""));
+ CPC_UNLOCK(card, flags);
+}
+
+int cpc_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if ((new_mtu < 128) || (new_mtu > PC300_DEF_MTU))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+int cpc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ pc300dev_t *d = (pc300dev_t *) dev->priv;
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ pc300conf_t conf_aux;
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ int ch = chan->channel;
+ void __user *arg = ifr->ifr_data;
+ struct if_settings *settings = &ifr->ifr_settings;
+ void __iomem *scabase = card->hw.scabase;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case SIOCGPC300CONF:
+#ifdef CONFIG_PC300_MLPPP
+ if (conf->proto != PC300_PROTO_MLPPP) {
+ conf->proto = hdlc->proto.id;
+ }
+#else
+ conf->proto = hdlc->proto.id;
+#endif
+ memcpy(&conf_aux.conf, conf, sizeof(pc300chconf_t));
+ memcpy(&conf_aux.hw, &card->hw, sizeof(pc300hw_t));
+ if (!arg ||
+ copy_to_user(arg, &conf_aux, sizeof(pc300conf_t)))
+ return -EINVAL;
+ return 0;
+ case SIOCSPC300CONF:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (!arg ||
+ copy_from_user(&conf_aux.conf, arg, sizeof(pc300chconf_t)))
+ return -EINVAL;
+ if (card->hw.cpld_id < 0x02 &&
+ conf_aux.conf.fr_mode == PC300_FR_UNFRAMED) {
+ /* CPLD_ID < 0x02 doesn't support Unframed E1 */
+ return -EINVAL;
+ }
+#ifdef CONFIG_PC300_MLPPP
+ if (conf_aux.conf.proto == PC300_PROTO_MLPPP) {
+ if (conf->proto != PC300_PROTO_MLPPP) {
+ memcpy(conf, &conf_aux.conf, sizeof(pc300chconf_t));
+ cpc_tty_init(d); /* init TTY driver */
+ }
+ } else {
+ if (conf_aux.conf.proto == 0xffff) {
+ if (conf->proto == PC300_PROTO_MLPPP){
+ /* ifdown interface */
+ cpc_close(dev);
+ }
+ } else {
+ memcpy(conf, &conf_aux.conf, sizeof(pc300chconf_t));
+ hdlc->proto.id = conf->proto;
+ }
+ }
+#else
+ memcpy(conf, &conf_aux.conf, sizeof(pc300chconf_t));
+ hdlc->proto.id = conf->proto;
+#endif
+ return 0;
+ case SIOCGPC300STATUS:
+ cpc_sca_status(card, ch);
+ return 0;
+ case SIOCGPC300FALCSTATUS:
+ cpc_falc_status(card, ch);
+ return 0;
+
+ case SIOCGPC300UTILSTATS:
+ {
+ if (!arg) { /* clear statistics */
+ memset(&hdlc->stats, 0, sizeof(struct net_device_stats));
+ if (card->hw.type == PC300_TE) {
+ memset(&chan->falc, 0, sizeof(falc_t));
+ }
+ } else {
+ pc300stats_t pc300stats;
+
+ memset(&pc300stats, 0, sizeof(pc300stats_t));
+ pc300stats.hw_type = card->hw.type;
+ pc300stats.line_on = card->chan[ch].d.line_on;
+ pc300stats.line_off = card->chan[ch].d.line_off;
+ memcpy(&pc300stats.gen_stats, &hdlc->stats,
+ sizeof(struct net_device_stats));
+ if (card->hw.type == PC300_TE)
+ memcpy(&pc300stats.te_stats,&chan->falc,sizeof(falc_t));
+ if (copy_to_user(arg, &pc300stats, sizeof(pc300stats_t)))
+ return -EFAULT;
+ }
+ return 0;
+ }
+
+ case SIOCGPC300UTILSTATUS:
+ {
+ struct pc300status pc300status;
+
+ pc300status.hw_type = card->hw.type;
+ if (card->hw.type == PC300_TE) {
+ pc300status.te_status.sync = chan->falc.sync;
+ pc300status.te_status.red_alarm = chan->falc.red_alarm;
+ pc300status.te_status.blue_alarm = chan->falc.blue_alarm;
+ pc300status.te_status.loss_fa = chan->falc.loss_fa;
+ pc300status.te_status.yellow_alarm =chan->falc.yellow_alarm;
+ pc300status.te_status.loss_mfa = chan->falc.loss_mfa;
+ pc300status.te_status.prbs = chan->falc.prbs;
+ } else {
+ pc300status.gen_status.dcd =
+ !(cpc_readb (scabase + M_REG(ST3, ch)) & ST3_DCD);
+ pc300status.gen_status.cts =
+ !(cpc_readb (scabase + M_REG(ST3, ch)) & ST3_CTS);
+ pc300status.gen_status.rts =
+ !(cpc_readb (scabase + M_REG(CTL, ch)) & CTL_RTS);
+ pc300status.gen_status.dtr =
+ !(cpc_readb (scabase + M_REG(CTL, ch)) & CTL_DTR);
+ /* There is no DSR in HD64572 */
+ }
+ if (!arg
+ || copy_to_user(arg, &pc300status, sizeof(pc300status_t)))
+ return -EINVAL;
+ return 0;
+ }
+
+ case SIOCSPC300TRACE:
+ /* Sets/resets a trace_flag for the respective device */
+ if (!arg || copy_from_user(&d->trace_on, arg,sizeof(unsigned char)))
+ return -EINVAL;
+ return 0;
+
+ case SIOCSPC300LOOPBACK:
+ {
+ struct pc300loopback pc300loop;
+
+ /* TE boards only */
+ if (card->hw.type != PC300_TE)
+ return -EINVAL;
+
+ if (!arg ||
+ copy_from_user(&pc300loop, arg, sizeof(pc300loopback_t)))
+ return -EINVAL;
+ switch (pc300loop.loop_type) {
+ case PC300LOCLOOP: /* Turn the local loop on/off */
+ falc_local_loop(card, ch, pc300loop.loop_on);
+ return 0;
+
+ case PC300REMLOOP: /* Turn the remote loop on/off */
+ falc_remote_loop(card, ch, pc300loop.loop_on);
+ return 0;
+
+ case PC300PAYLOADLOOP: /* Turn the payload loop on/off */
+ falc_payload_loop(card, ch, pc300loop.loop_on);
+ return 0;
+
+ case PC300GENLOOPUP: /* Generate loop UP */
+ if (pc300loop.loop_on) {
+ falc_generate_loop_up_code (card, ch);
+ } else {
+ turn_off_xlu(card, ch);
+ }
+ return 0;
+
+ case PC300GENLOOPDOWN: /* Generate loop DOWN */
+ if (pc300loop.loop_on) {
+ falc_generate_loop_down_code (card, ch);
+ } else {
+ turn_off_xld(card, ch);
+ }
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+ }
+
+ case SIOCSPC300PATTERNTEST:
+ /* Turn the pattern test on/off and show the errors counter */
+ {
+ struct pc300patterntst pc300patrntst;
+
+ /* TE boards only */
+ if (card->hw.type != PC300_TE)
+ return -EINVAL;
+
+ if (card->hw.cpld_id < 0x02) {
+ /* CPLD_ID < 0x02 doesn't support pattern test */
+ return -EINVAL;
+ }
+
+ if (!arg ||
+ copy_from_user(&pc300patrntst,arg,sizeof(pc300patterntst_t)))
+ return -EINVAL;
+ if (pc300patrntst.patrntst_on == 2) {
+ if (chan->falc.prbs == 0) {
+ falc_pattern_test(card, ch, 1);
+ }
+ pc300patrntst.num_errors =
+ falc_pattern_test_error(card, ch);
+ if (!arg
+ || copy_to_user(arg, &pc300patrntst,
+ sizeof (pc300patterntst_t)))
+ return -EINVAL;
+ } else {
+ falc_pattern_test(card, ch, pc300patrntst.patrntst_on);
+ }
+ return 0;
+ }
+
+ case SIOCWANDEV:
+ switch (ifr->ifr_settings.type) {
+ case IF_GET_IFACE:
+ {
+ const size_t size = sizeof(sync_serial_settings);
+ ifr->ifr_settings.type = conf->media;
+ if (ifr->ifr_settings.size < size) {
+ /* data size wanted */
+ ifr->ifr_settings.size = size;
+ return -ENOBUFS;
+ }
+
+ if (copy_to_user(settings->ifs_ifsu.sync,
+ &conf->phys_settings, size)) {
+ return -EFAULT;
+ }
+ return 0;
+ }
+
+ case IF_IFACE_V35:
+ case IF_IFACE_V24:
+ case IF_IFACE_X21:
+ {
+ const size_t size = sizeof(sync_serial_settings);
+
+ if (!capable(CAP_NET_ADMIN)) {
+ return -EPERM;
+ }
+ /* incorrect data len? */
+ if (ifr->ifr_settings.size != size) {
+ return -ENOBUFS;
+ }
+
+ if (copy_from_user(&conf->phys_settings,
+ settings->ifs_ifsu.sync, size)) {
+ return -EFAULT;
+ }
+
+ if (conf->phys_settings.loopback) {
+ cpc_writeb(card->hw.scabase + M_REG(MD2, ch),
+ cpc_readb(card->hw.scabase + M_REG(MD2, ch)) |
+ MD2_LOOP_MIR);
+ }
+ conf->media = ifr->ifr_settings.type;
+ return 0;
+ }
+
+ case IF_IFACE_T1:
+ case IF_IFACE_E1:
+ {
+ const size_t te_size = sizeof(te1_settings);
+ const size_t size = sizeof(sync_serial_settings);
+
+ if (!capable(CAP_NET_ADMIN)) {
+ return -EPERM;
+ }
+
+ /* incorrect data len? */
+ if (ifr->ifr_settings.size != te_size) {
+ return -ENOBUFS;
+ }
+
+ if (copy_from_user(&conf->phys_settings,
+ settings->ifs_ifsu.te1, size)) {
+ return -EFAULT;
+ }/* Ignoring HDLC slot_map for a while */
+
+ if (conf->phys_settings.loopback) {
+ cpc_writeb(card->hw.scabase + M_REG(MD2, ch),
+ cpc_readb(card->hw.scabase + M_REG(MD2, ch)) |
+ MD2_LOOP_MIR);
+ }
+ conf->media = ifr->ifr_settings.type;
+ return 0;
+ }
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+
+ default:
+ return hdlc_ioctl(dev, ifr, cmd);
+ }
+}
+
+static struct net_device_stats *cpc_get_stats(struct net_device *dev)
+{
+ return hdlc_stats(dev);
+}
+
+static int clock_rate_calc(uclong rate, uclong clock, int *br_io)
+{
+ int br, tc;
+ int br_pwr, error;
+
+ if (rate == 0)
+ return (0);
+
+ for (br = 0, br_pwr = 1; br <= 9; br++, br_pwr <<= 1) {
+ if ((tc = clock / br_pwr / rate) <= 0xff) {
+ *br_io = br;
+ break;
+ }
+ }
+
+ if (tc <= 0xff) {
+ error = ((rate - (clock / br_pwr / rate)) / rate) * 1000;
+ /* Errors bigger than +/- 1% won't be tolerated */
+ if (error < -10 || error > 10)
+ return (-1);
+ else
+ return (tc);
+ } else {
+ return (-1);
+ }
+}
+
+int ch_config(pc300dev_t * d)
+{
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300chconf_t *conf = (pc300chconf_t *) & chan->conf;
+ pc300_t *card = (pc300_t *) chan->card;
+ void __iomem *scabase = card->hw.scabase;
+ void __iomem *plxbase = card->hw.plxbase;
+ int ch = chan->channel;
+ uclong clkrate = chan->conf.phys_settings.clock_rate;
+ uclong clktype = chan->conf.phys_settings.clock_type;
+ ucshort encoding = chan->conf.proto_settings.encoding;
+ ucshort parity = chan->conf.proto_settings.parity;
+ int tmc, br;
+ ucchar md0, md2;
+
+ /* Reset the channel */
+ cpc_writeb(scabase + M_REG(CMD, ch), CMD_CH_RST);
+
+ /* Configure the SCA registers */
+ switch (parity) {
+ case PARITY_NONE:
+ md0 = MD0_BIT_SYNC;
+ break;
+ case PARITY_CRC16_PR0:
+ md0 = MD0_CRC16_0|MD0_CRCC0|MD0_BIT_SYNC;
+ break;
+ case PARITY_CRC16_PR1:
+ md0 = MD0_CRC16_1|MD0_CRCC0|MD0_BIT_SYNC;
+ break;
+ case PARITY_CRC32_PR1_CCITT:
+ md0 = MD0_CRC32|MD0_CRCC0|MD0_BIT_SYNC;
+ break;
+ case PARITY_CRC16_PR1_CCITT:
+ default:
+ md0 = MD0_CRC_CCITT|MD0_CRCC0|MD0_BIT_SYNC;
+ break;
+ }
+ switch (encoding) {
+ case ENCODING_NRZI:
+ md2 = MD2_F_DUPLEX|MD2_ADPLL_X8|MD2_NRZI;
+ break;
+ case ENCODING_FM_MARK: /* FM1 */
+ md2 = MD2_F_DUPLEX|MD2_ADPLL_X8|MD2_FM|MD2_FM1;
+ break;
+ case ENCODING_FM_SPACE: /* FM0 */
+ md2 = MD2_F_DUPLEX|MD2_ADPLL_X8|MD2_FM|MD2_FM0;
+ break;
+ case ENCODING_MANCHESTER: /* It's not working... */
+ md2 = MD2_F_DUPLEX|MD2_ADPLL_X8|MD2_FM|MD2_MANCH;
+ break;
+ case ENCODING_NRZ:
+ default:
+ md2 = MD2_F_DUPLEX|MD2_ADPLL_X8|MD2_NRZ;
+ break;
+ }
+ cpc_writeb(scabase + M_REG(MD0, ch), md0);
+ cpc_writeb(scabase + M_REG(MD1, ch), 0);
+ cpc_writeb(scabase + M_REG(MD2, ch), md2);
+ cpc_writeb(scabase + M_REG(IDL, ch), 0x7e);
+ cpc_writeb(scabase + M_REG(CTL, ch), CTL_URSKP | CTL_IDLC);
+
+ /* Configure HW media */
+ switch (card->hw.type) {
+ case PC300_RSV:
+ if (conf->media == IF_IFACE_V35) {
+ cpc_writel((plxbase + card->hw.gpioc_reg),
+ cpc_readl(plxbase + card->hw.gpioc_reg) | PC300_CHMEDIA_MASK(ch));
+ } else {
+ cpc_writel((plxbase + card->hw.gpioc_reg),
+ cpc_readl(plxbase + card->hw.gpioc_reg) & ~PC300_CHMEDIA_MASK(ch));
+ }
+ break;
+
+ case PC300_X21:
+ break;
+
+ case PC300_TE:
+ te_config(card, ch);
+ break;
+ }
+
+ switch (card->hw.type) {
+ case PC300_RSV:
+ case PC300_X21:
+ if (clktype == CLOCK_INT || clktype == CLOCK_TXINT) {
+ /* Calculate the clkrate parameters */
+ tmc = clock_rate_calc(clkrate, card->hw.clock, &br);
+ cpc_writeb(scabase + M_REG(TMCT, ch), tmc);
+ cpc_writeb(scabase + M_REG(TXS, ch),
+ (TXS_DTRXC | TXS_IBRG | br));
+ if (clktype == CLOCK_INT) {
+ cpc_writeb(scabase + M_REG(TMCR, ch), tmc);
+ cpc_writeb(scabase + M_REG(RXS, ch),
+ (RXS_IBRG | br));
+ } else {
+ cpc_writeb(scabase + M_REG(TMCR, ch), 1);
+ cpc_writeb(scabase + M_REG(RXS, ch), 0);
+ }
+ if (card->hw.type == PC300_X21) {
+ cpc_writeb(scabase + M_REG(GPO, ch), 1);
+ cpc_writeb(scabase + M_REG(EXS, ch), EXS_TES1 | EXS_RES1);
+ } else {
+ cpc_writeb(scabase + M_REG(EXS, ch), EXS_TES1);
+ }
+ } else {
+ cpc_writeb(scabase + M_REG(TMCT, ch), 1);
+ if (clktype == CLOCK_EXT) {
+ cpc_writeb(scabase + M_REG(TXS, ch),
+ TXS_DTRXC);
+ } else {
+ cpc_writeb(scabase + M_REG(TXS, ch),
+ TXS_DTRXC|TXS_RCLK);
+ }
+ cpc_writeb(scabase + M_REG(TMCR, ch), 1);
+ cpc_writeb(scabase + M_REG(RXS, ch), 0);
+ if (card->hw.type == PC300_X21) {
+ cpc_writeb(scabase + M_REG(GPO, ch), 0);
+ cpc_writeb(scabase + M_REG(EXS, ch), EXS_TES1 | EXS_RES1);
+ } else {
+ cpc_writeb(scabase + M_REG(EXS, ch), EXS_TES1);
+ }
+ }
+ break;
+
+ case PC300_TE:
+ /* SCA always receives clock from the FALC chip */
+ cpc_writeb(scabase + M_REG(TMCT, ch), 1);
+ cpc_writeb(scabase + M_REG(TXS, ch), 0);
+ cpc_writeb(scabase + M_REG(TMCR, ch), 1);
+ cpc_writeb(scabase + M_REG(RXS, ch), 0);
+ cpc_writeb(scabase + M_REG(EXS, ch), 0);
+ break;
+ }
+
+ /* Enable Interrupts */
+ cpc_writel(scabase + IER0,
+ cpc_readl(scabase + IER0) |
+ IR0_M(IR0_RXINTA, ch) |
+ IR0_DRX(IR0_EFT | IR0_DMIA | IR0_DMIB, ch) |
+ IR0_DTX(IR0_EFT | IR0_DMIA | IR0_DMIB, ch));
+ cpc_writeb(scabase + M_REG(IE0, ch),
+ cpc_readl(scabase + M_REG(IE0, ch)) | IE0_RXINTA);
+ cpc_writeb(scabase + M_REG(IE1, ch),
+ cpc_readl(scabase + M_REG(IE1, ch)) | IE1_CDCD);
+
+ return 0;
+}
+
+int rx_config(pc300dev_t * d)
+{
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ void __iomem *scabase = card->hw.scabase;
+ int ch = chan->channel;
+
+ cpc_writeb(scabase + DSR_RX(ch), 0);
+
+ /* General RX settings */
+ cpc_writeb(scabase + M_REG(RRC, ch), 0);
+ cpc_writeb(scabase + M_REG(RNR, ch), 16);
+
+ /* Enable reception */
+ cpc_writeb(scabase + M_REG(CMD, ch), CMD_RX_CRC_INIT);
+ cpc_writeb(scabase + M_REG(CMD, ch), CMD_RX_ENA);
+
+ /* Initialize DMA stuff */
+ chan->rx_first_bd = 0;
+ chan->rx_last_bd = N_DMA_RX_BUF - 1;
+ rx_dma_buf_init(card, ch);
+ cpc_writeb(scabase + DCR_RX(ch), DCR_FCT_CLR);
+ cpc_writeb(scabase + DMR_RX(ch), (DMR_TMOD | DMR_NF));
+ cpc_writeb(scabase + DIR_RX(ch), (DIR_EOM | DIR_BOF));
+
+ /* Start DMA */
+ rx_dma_start(card, ch);
+
+ return 0;
+}
+
+int tx_config(pc300dev_t * d)
+{
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ void __iomem *scabase = card->hw.scabase;
+ int ch = chan->channel;
+
+ cpc_writeb(scabase + DSR_TX(ch), 0);
+
+ /* General TX settings */
+ cpc_writeb(scabase + M_REG(TRC0, ch), 0);
+ cpc_writeb(scabase + M_REG(TFS, ch), 32);
+ cpc_writeb(scabase + M_REG(TNR0, ch), 20);
+ cpc_writeb(scabase + M_REG(TNR1, ch), 48);
+ cpc_writeb(scabase + M_REG(TCR, ch), 8);
+
+ /* Enable transmission */
+ cpc_writeb(scabase + M_REG(CMD, ch), CMD_TX_CRC_INIT);
+
+ /* Initialize DMA stuff */
+ chan->tx_first_bd = 0;
+ chan->tx_next_bd = 0;
+ tx_dma_buf_init(card, ch);
+ cpc_writeb(scabase + DCR_TX(ch), DCR_FCT_CLR);
+ cpc_writeb(scabase + DMR_TX(ch), (DMR_TMOD | DMR_NF));
+ cpc_writeb(scabase + DIR_TX(ch), (DIR_EOM | DIR_BOF | DIR_UDRF));
+ cpc_writel(scabase + DTX_REG(CDAL, ch), TX_BD_ADDR(ch, chan->tx_first_bd));
+ cpc_writel(scabase + DTX_REG(EDAL, ch), TX_BD_ADDR(ch, chan->tx_next_bd));
+
+ return 0;
+}
+
+static int cpc_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ pc300dev_t *d = (pc300dev_t *)dev->priv;
+ pc300ch_t *chan = (pc300ch_t *)d->chan;
+ pc300_t *card = (pc300_t *)chan->card;
+ pc300chconf_t *conf = (pc300chconf_t *)&chan->conf;
+
+ if (card->hw.type == PC300_TE) {
+ if (encoding != ENCODING_NRZ && encoding != ENCODING_NRZI) {
+ return -EINVAL;
+ }
+ } else {
+ if (encoding != ENCODING_NRZ && encoding != ENCODING_NRZI &&
+ encoding != ENCODING_FM_MARK && encoding != ENCODING_FM_SPACE) {
+ /* Driver doesn't support ENCODING_MANCHESTER yet */
+ return -EINVAL;
+ }
+ }
+
+ if (parity != PARITY_NONE && parity != PARITY_CRC16_PR0 &&
+ parity != PARITY_CRC16_PR1 && parity != PARITY_CRC32_PR1_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT) {
+ return -EINVAL;
+ }
+
+ conf->proto_settings.encoding = encoding;
+ conf->proto_settings.parity = parity;
+ return 0;
+}
+
+void cpc_opench(pc300dev_t * d)
+{
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ int ch = chan->channel;
+ void __iomem *scabase = card->hw.scabase;
+
+ ch_config(d);
+
+ rx_config(d);
+
+ tx_config(d);
+
+ /* Assert RTS and DTR */
+ cpc_writeb(scabase + M_REG(CTL, ch),
+ cpc_readb(scabase + M_REG(CTL, ch)) & ~(CTL_RTS | CTL_DTR));
+}
+
+void cpc_closech(pc300dev_t * d)
+{
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ falc_t *pfalc = (falc_t *) & chan->falc;
+ int ch = chan->channel;
+
+ cpc_writeb(card->hw.scabase + M_REG(CMD, ch), CMD_CH_RST);
+ rx_dma_stop(card, ch);
+ tx_dma_stop(card, ch);
+
+ if (card->hw.type == PC300_TE) {
+ memset(pfalc, 0, sizeof(falc_t));
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg2,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) &
+ ~((CPLD_REG2_FALC_TX_CLK | CPLD_REG2_FALC_RX_CLK |
+ CPLD_REG2_FALC_LED2) << (2 * ch)));
+ /* Reset the FALC chip */
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) |
+ (CPLD_REG1_FALC_RESET << (2 * ch)));
+ udelay(10000);
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) &
+ ~(CPLD_REG1_FALC_RESET << (2 * ch)));
+ }
+}
+
+int cpc_open(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ pc300dev_t *d = (pc300dev_t *) dev->priv;
+ struct ifreq ifr;
+ int result;
+
+#ifdef PC300_DEBUG_OTHER
+ printk("pc300: cpc_open");
+#endif
+
+ if (hdlc->proto.id == IF_PROTO_PPP) {
+ d->if_ptr = &hdlc->state.ppp.pppdev;
+ }
+
+ result = hdlc_open(dev);
+ if (hdlc->proto.id == IF_PROTO_PPP) {
+ dev->priv = d;
+ }
+ if (result) {
+ return result;
+ }
+
+ sprintf(ifr.ifr_name, "%s", dev->name);
+ cpc_opench(d);
+ netif_start_queue(dev);
+ return 0;
+}
+
+int cpc_close(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ pc300dev_t *d = (pc300dev_t *) dev->priv;
+ pc300ch_t *chan = (pc300ch_t *) d->chan;
+ pc300_t *card = (pc300_t *) chan->card;
+ unsigned long flags;
+
+#ifdef PC300_DEBUG_OTHER
+ printk("pc300: cpc_close");
+#endif
+
+ netif_stop_queue(dev);
+
+ CPC_LOCK(card, flags);
+ cpc_closech(d);
+ CPC_UNLOCK(card, flags);
+
+ hdlc_close(dev);
+ if (hdlc->proto.id == IF_PROTO_PPP) {
+ d->if_ptr = NULL;
+ }
+#ifdef CONFIG_PC300_MLPPP
+ if (chan->conf.proto == PC300_PROTO_MLPPP) {
+ cpc_tty_unregister_service(d);
+ chan->conf.proto = 0xffff;
+ }
+#endif
+
+ return 0;
+}
+
+static uclong detect_ram(pc300_t * card)
+{
+ uclong i;
+ ucchar data;
+ void __iomem *rambase = card->hw.rambase;
+
+ card->hw.ramsize = PC300_RAMSIZE;
+ /* Let's find out how much RAM is present on this board */
+ for (i = 0; i < card->hw.ramsize; i++) {
+ data = (ucchar) (i & 0xff);
+ cpc_writeb(rambase + i, data);
+ if (cpc_readb(rambase + i) != data) {
+ break;
+ }
+ }
+ return (i);
+}
+
+static void plx_init(pc300_t * card)
+{
+ struct RUNTIME_9050 __iomem *plx_ctl = card->hw.plxbase;
+
+ /* Reset PLX */
+ cpc_writel(&plx_ctl->init_ctrl,
+ cpc_readl(&plx_ctl->init_ctrl) | 0x40000000);
+ udelay(10000L);
+ cpc_writel(&plx_ctl->init_ctrl,
+ cpc_readl(&plx_ctl->init_ctrl) & ~0x40000000);
+
+ /* Reload Config. Registers from EEPROM */
+ cpc_writel(&plx_ctl->init_ctrl,
+ cpc_readl(&plx_ctl->init_ctrl) | 0x20000000);
+ udelay(10000L);
+ cpc_writel(&plx_ctl->init_ctrl,
+ cpc_readl(&plx_ctl->init_ctrl) & ~0x20000000);
+
+}
+
+static inline void show_version(void)
+{
+ char *rcsvers, *rcsdate, *tmp;
+
+ rcsvers = strchr(rcsid, ' ');
+ rcsvers++;
+ tmp = strchr(rcsvers, ' ');
+ *tmp++ = '\0';
+ rcsdate = strchr(tmp, ' ');
+ rcsdate++;
+ tmp = strrchr(rcsdate, ' ');
+ *tmp = '\0';
+ printk(KERN_INFO "Cyclades-PC300 driver %s %s (built %s %s)\n",
+ rcsvers, rcsdate, __DATE__, __TIME__);
+} /* show_version */
+
+static void cpc_init_card(pc300_t * card)
+{
+ int i, devcount = 0;
+ static int board_nbr = 1;
+
+ /* Enable interrupts on the PCI bridge */
+ plx_init(card);
+ cpc_writew(card->hw.plxbase + card->hw.intctl_reg,
+ cpc_readw(card->hw.plxbase + card->hw.intctl_reg) | 0x0040);
+
+#ifdef USE_PCI_CLOCK
+ /* Set board clock to PCI clock */
+ cpc_writel(card->hw.plxbase + card->hw.gpioc_reg,
+ cpc_readl(card->hw.plxbase + card->hw.gpioc_reg) | 0x00000004UL);
+ card->hw.clock = PC300_PCI_CLOCK;
+#else
+ /* Set board clock to internal oscillator clock */
+ cpc_writel(card->hw.plxbase + card->hw.gpioc_reg,
+ cpc_readl(card->hw.plxbase + card->hw.gpioc_reg) & ~0x00000004UL);
+ card->hw.clock = PC300_OSC_CLOCK;
+#endif
+
+ /* Detect actual on-board RAM size */
+ card->hw.ramsize = detect_ram(card);
+
+ /* Set Global SCA-II registers */
+ cpc_writeb(card->hw.scabase + PCR, PCR_PR2);
+ cpc_writeb(card->hw.scabase + BTCR, 0x10);
+ cpc_writeb(card->hw.scabase + WCRL, 0);
+ cpc_writeb(card->hw.scabase + DMER, 0x80);
+
+ if (card->hw.type == PC300_TE) {
+ ucchar reg1;
+
+ /* Check CPLD version */
+ reg1 = cpc_readb(card->hw.falcbase + CPLD_REG1);
+ cpc_writeb(card->hw.falcbase + CPLD_REG1, (reg1 + 0x5a));
+ if (cpc_readb(card->hw.falcbase + CPLD_REG1) == reg1) {
+ /* New CPLD */
+ card->hw.cpld_id = cpc_readb(card->hw.falcbase + CPLD_ID_REG);
+ card->hw.cpld_reg1 = CPLD_V2_REG1;
+ card->hw.cpld_reg2 = CPLD_V2_REG2;
+ } else {
+ /* old CPLD */
+ card->hw.cpld_id = 0;
+ card->hw.cpld_reg1 = CPLD_REG1;
+ card->hw.cpld_reg2 = CPLD_REG2;
+ cpc_writeb(card->hw.falcbase + CPLD_REG1, reg1);
+ }
+
+ /* Enable the board's global clock */
+ cpc_writeb(card->hw.falcbase + card->hw.cpld_reg1,
+ cpc_readb(card->hw.falcbase + card->hw.cpld_reg1) |
+ CPLD_REG1_GLOBAL_CLK);
+
+ }
+
+ for (i = 0; i < card->hw.nchan; i++) {
+ pc300ch_t *chan = &card->chan[i];
+ pc300dev_t *d = &chan->d;
+ hdlc_device *hdlc;
+ struct net_device *dev;
+
+ chan->card = card;
+ chan->channel = i;
+ chan->conf.phys_settings.clock_rate = 0;
+ chan->conf.phys_settings.clock_type = CLOCK_EXT;
+ chan->conf.proto_settings.encoding = ENCODING_NRZ;
+ chan->conf.proto_settings.parity = PARITY_CRC16_PR1_CCITT;
+ switch (card->hw.type) {
+ case PC300_TE:
+ chan->conf.media = IF_IFACE_T1;
+ chan->conf.lcode = PC300_LC_B8ZS;
+ chan->conf.fr_mode = PC300_FR_ESF;
+ chan->conf.lbo = PC300_LBO_0_DB;
+ chan->conf.rx_sens = PC300_RX_SENS_SH;
+ chan->conf.tslot_bitmap = 0xffffffffUL;
+ break;
+
+ case PC300_X21:
+ chan->conf.media = IF_IFACE_X21;
+ break;
+
+ case PC300_RSV:
+ default:
+ chan->conf.media = IF_IFACE_V35;
+ break;
+ }
+ chan->conf.proto = IF_PROTO_PPP;
+ chan->tx_first_bd = 0;
+ chan->tx_next_bd = 0;
+ chan->rx_first_bd = 0;
+ chan->rx_last_bd = N_DMA_RX_BUF - 1;
+ chan->nfree_tx_bd = N_DMA_TX_BUF;
+
+ d->chan = chan;
+ d->tx_skb = NULL;
+ d->trace_on = 0;
+ d->line_on = 0;
+ d->line_off = 0;
+
+ dev = alloc_hdlcdev(NULL);
+ if (dev == NULL)
+ continue;
+
+ hdlc = dev_to_hdlc(dev);
+ hdlc->xmit = cpc_queue_xmit;
+ hdlc->attach = cpc_attach;
+ d->dev = dev;
+ dev->mem_start = card->hw.ramphys;
+ dev->mem_end = card->hw.ramphys + card->hw.ramsize - 1;
+ dev->irq = card->hw.irq;
+ dev->init = NULL;
+ dev->tx_queue_len = PC300_TX_QUEUE_LEN;
+ dev->mtu = PC300_DEF_MTU;
+
+ dev->open = cpc_open;
+ dev->stop = cpc_close;
+ dev->tx_timeout = cpc_tx_timeout;
+ dev->watchdog_timeo = PC300_TX_TIMEOUT;
+ dev->get_stats = cpc_get_stats;
+ dev->set_multicast_list = NULL;
+ dev->set_mac_address = NULL;
+ dev->change_mtu = cpc_change_mtu;
+ dev->do_ioctl = cpc_ioctl;
+
+ if (register_hdlc_device(dev) == 0) {
+ dev->priv = d; /* We need 'priv', hdlc doesn't */
+ printk("%s: Cyclades-PC300/", dev->name);
+ switch (card->hw.type) {
+ case PC300_TE:
+ if (card->hw.bus == PC300_PMC) {
+ printk("TE-M");
+ } else {
+ printk("TE ");
+ }
+ break;
+
+ case PC300_X21:
+ printk("X21 ");
+ break;
+
+ case PC300_RSV:
+ default:
+ printk("RSV ");
+ break;
+ }
+ printk (" #%d, %dKB of RAM at 0x%08x, IRQ%d, channel %d.\n",
+ board_nbr, card->hw.ramsize / 1024,
+ card->hw.ramphys, card->hw.irq, i + 1);
+ devcount++;
+ } else {
+ printk ("Dev%d on card(0x%08x): unable to allocate i/f name.\n",
+ i + 1, card->hw.ramphys);
+ free_netdev(dev);
+ continue;
+ }
+ }
+ spin_lock_init(&card->card_lock);
+
+ board_nbr++;
+}
+
+static int __devinit
+cpc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ static int first_time = 1;
+ ucchar cpc_rev_id;
+ int err = 0, eeprom_outdated = 0;
+ ucshort device_id;
+ pc300_t *card;
+
+ if (first_time) {
+ first_time = 0;
+ show_version();
+#ifdef CONFIG_PC300_MLPPP
+ cpc_tty_reset_var();
+#endif
+ }
+
+ card = (pc300_t *) kmalloc(sizeof(pc300_t), GFP_KERNEL);
+ if (card == NULL) {
+ printk("PC300 found at RAM 0x%08lx, "
+ "but could not allocate card structure.\n",
+ pci_resource_start(pdev, 3));
+ return -ENOMEM;
+ }
+ memset(card, 0, sizeof(pc300_t));
+
+ /* read PCI configuration area */
+ device_id = ent->device;
+ card->hw.irq = pdev->irq;
+ card->hw.iophys = pci_resource_start(pdev, 1);
+ card->hw.iosize = pci_resource_len(pdev, 1);
+ card->hw.scaphys = pci_resource_start(pdev, 2);
+ card->hw.scasize = pci_resource_len(pdev, 2);
+ card->hw.ramphys = pci_resource_start(pdev, 3);
+ card->hw.alloc_ramsize = pci_resource_len(pdev, 3);
+ card->hw.falcphys = pci_resource_start(pdev, 4);
+ card->hw.falcsize = pci_resource_len(pdev, 4);
+ card->hw.plxphys = pci_resource_start(pdev, 5);
+ card->hw.plxsize = pci_resource_len(pdev, 5);
+ pci_read_config_byte(pdev, PCI_REVISION_ID, &cpc_rev_id);
+
+ switch (device_id) {
+ case PCI_DEVICE_ID_PC300_RX_1:
+ case PCI_DEVICE_ID_PC300_TE_1:
+ case PCI_DEVICE_ID_PC300_TE_M_1:
+ card->hw.nchan = 1;
+ break;
+
+ case PCI_DEVICE_ID_PC300_RX_2:
+ case PCI_DEVICE_ID_PC300_TE_2:
+ case PCI_DEVICE_ID_PC300_TE_M_2:
+ default:
+ card->hw.nchan = PC300_MAXCHAN;
+ break;
+ }
+#ifdef PC300_DEBUG_PCI
+ printk("cpc (bus=0x0%x,pci_id=0x%x,", pdev->bus->number, pdev->devfn);
+ printk("rev_id=%d) IRQ%d\n", cpc_rev_id, card->hw.irq);
+ printk("cpc:found ramaddr=0x%08lx plxaddr=0x%08lx "
+ "ctladdr=0x%08lx falcaddr=0x%08lx\n",
+ card->hw.ramphys, card->hw.plxphys, card->hw.scaphys,
+ card->hw.falcphys);
+#endif
+ /* Although we don't use this I/O region, we should
+ * request it from the kernel anyway, to avoid problems
+ * with other drivers accessing it. */
+ if (!request_region(card->hw.iophys, card->hw.iosize, "PLX Registers")) {
+ /* In case we can't allocate it, warn user */
+ printk("WARNING: couldn't allocate I/O region for PC300 board "
+ "at 0x%08x!\n", card->hw.ramphys);
+ }
+
+ if (card->hw.plxphys) {
+ pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, card->hw.plxphys);
+ } else {
+ eeprom_outdated = 1;
+ card->hw.plxphys = pci_resource_start(pdev, 0);
+ card->hw.plxsize = pci_resource_len(pdev, 0);
+ }
+
+ if (!request_mem_region(card->hw.plxphys, card->hw.plxsize,
+ "PLX Registers")) {
+ printk("PC300 found at RAM 0x%08x, "
+ "but could not allocate PLX mem region.\n",
+ card->hw.ramphys);
+ err = -ENODEV;
+ goto err_release_io;
+ }
+ if (!request_mem_region(card->hw.ramphys, card->hw.alloc_ramsize,
+ "On-board RAM")) {
+ printk("PC300 found at RAM 0x%08x, "
+ "but could not allocate RAM mem region.\n",
+ card->hw.ramphys);
+ err = -ENODEV;
+ goto err_release_plx;
+ }
+ if (!request_mem_region(card->hw.scaphys, card->hw.scasize,
+ "SCA-II Registers")) {
+ printk("PC300 found at RAM 0x%08x, "
+ "but could not allocate SCA mem region.\n",
+ card->hw.ramphys);
+ err = -ENODEV;
+ goto err_release_ram;
+ }
+
+ if ((err = pci_enable_device(pdev)) != 0)
+ goto err_release_sca;
+
+ card->hw.plxbase = ioremap(card->hw.plxphys, card->hw.plxsize);
+ card->hw.rambase = ioremap(card->hw.ramphys, card->hw.alloc_ramsize);
+ card->hw.scabase = ioremap(card->hw.scaphys, card->hw.scasize);
+ switch (device_id) {
+ case PCI_DEVICE_ID_PC300_TE_1:
+ case PCI_DEVICE_ID_PC300_TE_2:
+ case PCI_DEVICE_ID_PC300_TE_M_1:
+ case PCI_DEVICE_ID_PC300_TE_M_2:
+ request_mem_region(card->hw.falcphys, card->hw.falcsize,
+ "FALC Registers");
+ card->hw.falcbase = ioremap(card->hw.falcphys, card->hw.falcsize);
+ break;
+
+ case PCI_DEVICE_ID_PC300_RX_1:
+ case PCI_DEVICE_ID_PC300_RX_2:
+ default:
+ card->hw.falcbase = NULL;
+ break;
+ }
+
+#ifdef PC300_DEBUG_PCI
+ printk("cpc: relocate ramaddr=0x%08lx plxaddr=0x%08lx "
+ "ctladdr=0x%08lx falcaddr=0x%08lx\n",
+ card->hw.rambase, card->hw.plxbase, card->hw.scabase,
+ card->hw.falcbase);
+#endif
+
+ /* Set PCI drv pointer to the card structure */
+ pci_set_drvdata(pdev, card);
+
+ /* Set board type */
+ switch (device_id) {
+ case PCI_DEVICE_ID_PC300_TE_1:
+ case PCI_DEVICE_ID_PC300_TE_2:
+ case PCI_DEVICE_ID_PC300_TE_M_1:
+ case PCI_DEVICE_ID_PC300_TE_M_2:
+ card->hw.type = PC300_TE;
+
+ if ((device_id == PCI_DEVICE_ID_PC300_TE_M_1) ||
+ (device_id == PCI_DEVICE_ID_PC300_TE_M_2)) {
+ card->hw.bus = PC300_PMC;
+ /* Set PLX register offsets */
+ card->hw.gpioc_reg = 0x54;
+ card->hw.intctl_reg = 0x4c;
+ } else {
+ card->hw.bus = PC300_PCI;
+ /* Set PLX register offsets */
+ card->hw.gpioc_reg = 0x50;
+ card->hw.intctl_reg = 0x4c;
+ }
+ break;
+
+ case PCI_DEVICE_ID_PC300_RX_1:
+ case PCI_DEVICE_ID_PC300_RX_2:
+ default:
+ card->hw.bus = PC300_PCI;
+ /* Set PLX register offsets */
+ card->hw.gpioc_reg = 0x50;
+ card->hw.intctl_reg = 0x4c;
+
+ if ((cpc_readl(card->hw.plxbase + card->hw.gpioc_reg) & PC300_CTYPE_MASK)) {
+ card->hw.type = PC300_X21;
+ } else {
+ card->hw.type = PC300_RSV;
+ }
+ break;
+ }
+
+ /* Allocate IRQ */
+ if (request_irq(card->hw.irq, cpc_intr, SA_SHIRQ, "Cyclades-PC300", card)) {
+ printk ("PC300 found at RAM 0x%08x, but could not allocate IRQ%d.\n",
+ card->hw.ramphys, card->hw.irq);
+ goto err_io_unmap;
+ }
+
+ cpc_init_card(card);
+
+ if (eeprom_outdated)
+ printk("WARNING: PC300 with outdated EEPROM.\n");
+ return 0;
+
+err_io_unmap:
+ iounmap(card->hw.plxbase);
+ iounmap(card->hw.scabase);
+ iounmap(card->hw.rambase);
+ if (card->hw.type == PC300_TE) {
+ iounmap(card->hw.falcbase);
+ release_mem_region(card->hw.falcphys, card->hw.falcsize);
+ }
+err_release_sca:
+ release_mem_region(card->hw.scaphys, card->hw.scasize);
+err_release_ram:
+ release_mem_region(card->hw.ramphys, card->hw.alloc_ramsize);
+err_release_plx:
+ release_mem_region(card->hw.plxphys, card->hw.plxsize);
+err_release_io:
+ release_region(card->hw.iophys, card->hw.iosize);
+ kfree(card);
+ return -ENODEV;
+}
+
+static void __devexit cpc_remove_one(struct pci_dev *pdev)
+{
+ pc300_t *card = pci_get_drvdata(pdev);
+
+ if (card->hw.rambase != 0) {
+ int i;
+
+ /* Disable interrupts on the PCI bridge */
+ cpc_writew(card->hw.plxbase + card->hw.intctl_reg,
+ cpc_readw(card->hw.plxbase + card->hw.intctl_reg) & ~(0x0040));
+
+ for (i = 0; i < card->hw.nchan; i++) {
+ unregister_hdlc_device(card->chan[i].d.dev);
+ }
+ iounmap(card->hw.plxbase);
+ iounmap(card->hw.scabase);
+ iounmap(card->hw.rambase);
+ release_mem_region(card->hw.plxphys, card->hw.plxsize);
+ release_mem_region(card->hw.ramphys, card->hw.alloc_ramsize);
+ release_mem_region(card->hw.scaphys, card->hw.scasize);
+ release_region(card->hw.iophys, card->hw.iosize);
+ if (card->hw.type == PC300_TE) {
+ iounmap(card->hw.falcbase);
+ release_mem_region(card->hw.falcphys, card->hw.falcsize);
+ }
+ for (i = 0; i < card->hw.nchan; i++)
+ if (card->chan[i].d.dev)
+ free_netdev(card->chan[i].d.dev);
+ if (card->hw.irq)
+ free_irq(card->hw.irq, card);
+ kfree(card);
+ }
+}
+
+static struct pci_driver cpc_driver = {
+ .name = "pc300",
+ .id_table = cpc_pci_dev_id,
+ .probe = cpc_init_one,
+ .remove = __devexit_p(cpc_remove_one),
+};
+
+static int __init cpc_init(void)
+{
+ return pci_module_init(&cpc_driver);
+}
+
+static void __exit cpc_cleanup_module(void)
+{
+ pci_unregister_driver(&cpc_driver);
+}
+
+module_init(cpc_init);
+module_exit(cpc_cleanup_module);
+
+MODULE_DESCRIPTION("Cyclades-PC300 cards driver");
+MODULE_AUTHOR( "Author: Ivan Passos <ivan@cyclades.com>\r\n"
+ "Maintainer: PC300 Maintainer <pc300@cyclades.com");
+MODULE_LICENSE("GPL");
+
generated by cgit v1.1 at 2024-11-07 09:59:15 +0000