--- linux-2.5.24/drivers/net/irda/vlsi_ir.c Fri Jun 21 23:28:27 2002
+++ v2.5.24-md-ob/drivers/net/irda/vlsi_ir.c Tue Jul 9 18:39:11 2002
@@ -2,9 +2,7 @@
*
* vlsi_ir.c: VLSI82C147 PCI IrDA controller driver for Linux
*
- * Version: 0.3a, Nov 10, 2001
- *
- * Copyright (c) 2001 Martin Diehl
+ * Copyright (c) 2001-2002 Martin Diehl
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -25,6 +23,17 @@
#include <linux/module.h>
+MODULE_DESCRIPTION("IrDA SIR/MIR/FIR driver for VLSI 82C147");
+MODULE_AUTHOR("Martin Diehl <info@mdiehl.de>");
+MODULE_LICENSE("GPL");
+EXPORT_NO_SYMBOLS;
+
+#define DRIVER_NAME "vlsi_ir"
+#define DRIVER_VERSION "v0.4"
+
+/********************************************************/
+
+#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
@@ -33,6 +42,9 @@
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/smp_lock.h>
+#include <asm/uaccess.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
@@ -40,17 +52,9 @@
#include <net/irda/vlsi_ir.h>
-
/********************************************************/
-
-MODULE_DESCRIPTION("IrDA SIR/MIR/FIR driver for VLSI 82C147");
-MODULE_AUTHOR("Martin Diehl <info@mdiehl.de>");
-MODULE_LICENSE("GPL");
-
-
-static /* const */ char drivername[] = "vlsi_ir";
-
+static /* const */ char drivername[] = DRIVER_NAME;
#define PCI_CLASS_WIRELESS_IRDA 0x0d00
@@ -64,13 +68,8 @@
MODULE_DEVICE_TABLE(pci, vlsi_irda_table);
-
/********************************************************/
-
-MODULE_PARM(clksrc, "i");
-MODULE_PARM_DESC(clksrc, "clock input source selection");
-
/* clksrc: which clock source to be used
* 0: auto - try PLL, fallback to 40MHz XCLK
* 1: on-chip 48MHz PLL
@@ -78,12 +77,10 @@
* 3: external 40MHz XCLK (HP OB-800)
*/
+MODULE_PARM(clksrc, "i");
+MODULE_PARM_DESC(clksrc, "clock input source selection");
static int clksrc = 0; /* default is 0(auto) */
-
-MODULE_PARM(ringsize, "1-2i");
-MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size");
-
/* ringsize: size of the tx and rx descriptor rings
* independent for tx and rx
* specify as ringsize=tx[,rx]
@@ -92,11 +89,9 @@
* there should be no gain when using rings larger than 8
*/
-static int ringsize[] = {8,8}; /* default is tx=rx=8 */
-
-
-MODULE_PARM(sirpulse, "i");
-MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning");
+MODULE_PARM(ringsize, "1-2i");
+MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size");
+static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */
/* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits
* 0: very short, 1.5us (exception: 6us at 2.4 kbaud)
@@ -107,355 +102,780 @@
* pulse width saves more than 90% of the transmitted IR power.
*/
+MODULE_PARM(sirpulse, "i");
+MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning");
static int sirpulse = 1; /* default is 3/16 bittime */
-
-MODULE_PARM(qos_mtt_bits, "i");
-MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time");
-
/* qos_mtt_bits: encoded min-turn-time value we require the peer device
* to use before transmitting to us. "Type 1" (per-station)
* bitfield according to IrLAP definition (section 6.6.8)
- * The HP HDLS-1100 requires 1 msec - don't even know
- * if this is the one which is used by my OB800
+ * Don't know which transceiver is used by my OB800 - the
+ * pretty common HP HDLS-1100 requires 1 msec - so lets use this.
*/
+MODULE_PARM(qos_mtt_bits, "i");
+MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time");
static int qos_mtt_bits = 0x04; /* default is 1 ms */
-
/********************************************************/
-
-/* some helpers for operations on ring descriptors */
-
-
-static inline int rd_is_active(struct vlsi_ring *r, unsigned i)
+static void vlsi_reg_debug(unsigned iobase, const char *s)
{
- return ((r->hw[i].rd_status & RD_STAT_ACTIVE) != 0);
-}
+ int i;
-static inline void rd_activate(struct vlsi_ring *r, unsigned i)
-{
- r->hw[i].rd_status |= RD_STAT_ACTIVE;
+ printk(KERN_DEBUG "%s: ", s);
+ for (i = 0; i < 0x20; i++)
+ printk("%02x", (unsigned)inb((iobase+i)));
+ printk("\n");
}
-static inline void rd_set_addr_status(struct vlsi_ring *r, unsigned i, dma_addr_t a, u8 s)
+static void vlsi_ring_debug(struct vlsi_ring *r)
{
- struct ring_descr *rd = r->hw +i;
-
- /* ordering is important for two reasons:
- * - overlayed: writing addr overwrites status
- * - we want to write status last so we have valid address in
- * case status has RD_STAT_ACTIVE set
- */
-
- if ((a & ~DMA_MASK_MSTRPAGE) != MSTRPAGE_VALUE)
- BUG();
-
- a &= DMA_MASK_MSTRPAGE; /* clear highbyte to make sure we won't write
- * to status - just in case MSTRPAGE_VALUE!=0
- */
- rd->rd_addr = a;
- wmb();
- rd->rd_status = s; /* potentially passes ownership to the hardware */
-}
+ struct ring_descr *rd;
+ unsigned i;
-static inline void rd_set_status(struct vlsi_ring *r, unsigned i, u8 s)
-{
- r->hw[i].rd_status = s;
+ printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
+ __FUNCTION__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw);
+ printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __FUNCTION__,
+ atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask);
+ for (i = 0; i < r->size; i++) {
+ rd = &r->rd[i];
+ printk(KERN_DEBUG "%s - ring descr %u: ", __FUNCTION__, i);
+ printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
+ printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n",
+ __FUNCTION__, (unsigned) rd_get_status(rd),
+ (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
+ }
}
-static inline void rd_set_count(struct vlsi_ring *r, unsigned i, u16 c)
-{
- r->hw[i].rd_count = c;
-}
+/********************************************************/
-static inline u8 rd_get_status(struct vlsi_ring *r, unsigned i)
-{
- return r->hw[i].rd_status;
-}
+#ifdef CONFIG_PROC_FS
-static inline dma_addr_t rd_get_addr(struct vlsi_ring *r, unsigned i)
+static int vlsi_proc_pdev(struct pci_dev *pdev, char *buf, int len)
{
- dma_addr_t a;
+ unsigned iobase = pci_resource_start(pdev, 0);
+ unsigned i;
+ char *out = buf;
- a = (r->hw[i].rd_addr & DMA_MASK_MSTRPAGE) | (MSTRPAGE_VALUE << 24);
- return a;
-}
+ if (len < 500)
+ return 0;
-static inline u16 rd_get_count(struct vlsi_ring *r, unsigned i)
-{
- return r->hw[i].rd_count;
+ out += sprintf(out, "\n%s (vid/did: %04x/%04x)\n",
+ pdev->name, (int)pdev->vendor, (int)pdev->device);
+ out += sprintf(out, "pci-power-state: %u\n", (unsigned) pdev->current_state);
+ out += sprintf(out, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n",
+ pdev->irq, (unsigned)pci_resource_start(pdev, 0), (u64)pdev->dma_mask);
+ out += sprintf(out, "hw registers: ");
+ for (i = 0; i < 0x20; i++)
+ out += sprintf(out, "%02x", (unsigned)inb((iobase+i)));
+ out += sprintf(out, "\n");
+ return out - buf;
}
-
-/* producer advances r->head when descriptor was added for processing by hw */
-
-static inline void ring_put(struct vlsi_ring *r)
+
+static int vlsi_proc_ndev(struct net_device *ndev, char *buf, int len)
{
- r->head = (r->head + 1) & r->mask;
-}
+ vlsi_irda_dev_t *idev = ndev->priv;
+ char *out = buf;
+ u8 byte;
+ u16 word;
+ unsigned delta1, delta2;
+ struct timeval now;
+ unsigned iobase = ndev->base_addr;
-/* consumer advances r->tail when descriptor was removed after getting processed by hw */
+ if (len < 1000)
+ return 0;
-static inline void ring_get(struct vlsi_ring *r)
-{
- r->tail = (r->tail + 1) & r->mask;
-}
+ out += sprintf(out, "\n%s link state: %s / %s / %s / %s\n", ndev->name,
+ netif_device_present(ndev) ? "attached" : "detached",
+ netif_running(ndev) ? "running" : "not running",
+ netif_carrier_ok(ndev) ? "carrier ok" : "no carrier",
+ netif_queue_stopped(ndev) ? "queue stopped" : "queue running");
+ if (!netif_running(ndev))
+ return out - buf;
+
+ out += sprintf(out, "\nhw-state:\n");
+ pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte);
+ out += sprintf(out, "IRMISC:%s%s%s UART%s",
+ (byte&IRMISC_IRRAIL) ? " irrail" : "",
+ (byte&IRMISC_IRPD) ? " irpd" : "",
+ (byte&IRMISC_UARTTST) ? " uarttest" : "",
+ (byte&IRMISC_UARTEN) ? "" : " disabled\n");
+ if (byte&IRMISC_UARTEN) {
+ out += sprintf(out, "@0x%s\n",
+ (byte&2) ? ((byte&1) ? "3e8" : "2e8")
+ : ((byte&1) ? "3f8" : "2f8"));
+ }
+ pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte);
+ out += sprintf(out, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n",
+ (byte&CLKCTL_PD_INV) ? "powered" : "down",
+ (byte&CLKCTL_LOCK) ? " locked" : "",
+ (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "",
+ (byte&CLKCTL_CLKSTP) ? "stopped" : "running",
+ (byte&CLKCTL_WAKE) ? "enabled" : "disabled");
+ pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte);
+ out += sprintf(out, "MSTRPAGE: 0x%02x\n", (unsigned)byte);
+
+ byte = inb(iobase+VLSI_PIO_IRINTR);
+ out += sprintf(out, "IRINTR:%s%s%s%s%s%s%s%s\n",
+ (byte&IRINTR_ACTEN) ? " ACTEN" : "",
+ (byte&IRINTR_RPKTEN) ? " RPKTEN" : "",
+ (byte&IRINTR_TPKTEN) ? " TPKTEN" : "",
+ (byte&IRINTR_OE_EN) ? " OE_EN" : "",
+ (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "",
+ (byte&IRINTR_RPKTINT) ? " RPKTINT" : "",
+ (byte&IRINTR_TPKTINT) ? " TPKTINT" : "",
+ (byte&IRINTR_OE_INT) ? " OE_INT" : "");
+ word = inw(iobase+VLSI_PIO_RINGPTR);
+ out += sprintf(out, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word));
+ word = inw(iobase+VLSI_PIO_RINGBASE);
+ out += sprintf(out, "RINGBASE: busmap=0x%08x\n",
+ ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24));
+ word = inw(iobase+VLSI_PIO_RINGSIZE);
+ out += sprintf(out, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word),
+ RINGSIZE_TO_TXSIZE(word));
+
+ word = inw(iobase+VLSI_PIO_IRCFG);
+ out += sprintf(out, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
+ (word&IRCFG_LOOP) ? " LOOP" : "",
+ (word&IRCFG_ENTX) ? " ENTX" : "",
+ (word&IRCFG_ENRX) ? " ENRX" : "",
+ (word&IRCFG_MSTR) ? " MSTR" : "",
+ (word&IRCFG_RXANY) ? " RXANY" : "",
+ (word&IRCFG_CRC16) ? " CRC16" : "",
+ (word&IRCFG_FIR) ? " FIR" : "",
+ (word&IRCFG_MIR) ? " MIR" : "",
+ (word&IRCFG_SIR) ? " SIR" : "",
+ (word&IRCFG_SIRFILT) ? " SIRFILT" : "",
+ (word&IRCFG_SIRTEST) ? " SIRTEST" : "",
+ (word&IRCFG_TXPOL) ? " TXPOL" : "",
+ (word&IRCFG_RXPOL) ? " RXPOL" : "");
+ word = inw(iobase+VLSI_PIO_IRENABLE);
+ out += sprintf(out, "IRENABLE:%s%s%s%s%s%s%s%s\n",
+ (word&IRENABLE_IREN) ? " IRENABLE" : "",
+ (word&IRENABLE_CFGER) ? " CFGERR" : "",
+ (word&IRENABLE_FIR_ON) ? " FIR_ON" : "",
+ (word&IRENABLE_MIR_ON) ? " MIR_ON" : "",
+ (word&IRENABLE_SIR_ON) ? " SIR_ON" : "",
+ (word&IRENABLE_ENTXST) ? " ENTXST" : "",
+ (word&IRENABLE_ENRXST) ? " ENRXST" : "",
+ (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : "");
+ word = inw(iobase+VLSI_PIO_PHYCTL);
+ out += sprintf(out, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
+ (unsigned)PHYCTL_TO_BAUD(word),
+ (unsigned)PHYCTL_TO_PLSWID(word),
+ (unsigned)PHYCTL_TO_PREAMB(word));
+ word = inw(iobase+VLSI_PIO_NPHYCTL);
+ out += sprintf(out, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
+ (unsigned)PHYCTL_TO_BAUD(word),
+ (unsigned)PHYCTL_TO_PLSWID(word),
+ (unsigned)PHYCTL_TO_PREAMB(word));
+ word = inw(iobase+VLSI_PIO_MAXPKT);
+ out += sprintf(out, "MAXPKT: max. rx packet size = %u\n", word);
+ word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
+ out += sprintf(out, "RCVBCNT: rx-fifo filling level = %u\n", word);
+
+ out += sprintf(out, "\nsw-state:\n");
+ out += sprintf(out, "IrPHY setup: %d baud - %s encoding\n", idev->baud,
+ (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR"));
+ do_gettimeofday(&now);
+ if (now.tv_usec >= idev->last_rx.tv_usec) {
+ delta2 = now.tv_usec - idev->last_rx.tv_usec;
+ delta1 = 0;
+ }
+ else {
+ delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec;
+ delta1 = 1;
+ }
+ out += sprintf(out, "last rx: %lu.%06u sec\n",
+ now.tv_sec - idev->last_rx.tv_sec - delta1, delta2);
+ out += sprintf(out, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu",
+ idev->stats.rx_packets, idev->stats.rx_bytes, idev->stats.rx_errors,
+ idev->stats.rx_dropped);
+ out += sprintf(out, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n",
+ idev->stats.rx_over_errors, idev->stats.rx_length_errors,
+ idev->stats.rx_frame_errors, idev->stats.rx_crc_errors);
+ out += sprintf(out, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n",
+ idev->stats.tx_packets, idev->stats.tx_bytes, idev->stats.tx_errors,
+ idev->stats.tx_dropped, idev->stats.tx_fifo_errors);
+
+ return out - buf;
+}
+
+static int vlsi_proc_ring(struct vlsi_ring *r, char *buf, int len)
+{
+ struct ring_descr *rd;
+ unsigned i, j;
+ int h, t;
+ char *out = buf;
-/********************************************************/
+ if (len < 3000)
+ return 0;
-/* the memory required to hold the 2 descriptor rings */
+ out += sprintf(out, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
+ r->size, r->mask, r->len, r->dir, r->rd[0].hw);
+ h = atomic_read(&r->head) & r->mask;
+ t = atomic_read(&r->tail) & r->mask;
+ out += sprintf(out, "head = %d / tail = %d ", h, t);
+ if (h == t)
+ out += sprintf(out, "(empty)\n");
+ else {
+ if (((t+1)&r->mask) == h)
+ out += sprintf(out, "(full)\n");
+ else
+ out += sprintf(out, "(level = %d)\n", ((unsigned)(t-h) & r->mask));
+ rd = &r->rd[h];
+ j = (unsigned) rd_get_count(rd);
+ out += sprintf(out, "current: rd = %d / status = %02x / len = %u\n",
+ h, (unsigned)rd_get_status(rd), j);
+ if (j > 0) {
+ out += sprintf(out, " data:");
+ if (j > 20)
+ j = 20;
+ for (i = 0; i < j; i++)
+ out += sprintf(out, " %02x", (unsigned)((unsigned char *)rd->buf)[i]);
+ out += sprintf(out, "\n");
+ }
+ }
+ for (i = 0; i < r->size; i++) {
+ rd = &r->rd[i];
+ out += sprintf(out, "> ring descr %u: ", i);
+ out += sprintf(out, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
+ out += sprintf(out, " hw: status=%02x count=%u busaddr=0x%08x\n",
+ (unsigned) rd_get_status(rd),
+ (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
+ }
+ return out - buf;
+}
-#define RING_AREA_SIZE (2 * MAX_RING_DESCR * sizeof(struct ring_descr))
+static int vlsi_proc_print(struct net_device *ndev, char *buf, int len)
+{
+ vlsi_irda_dev_t *idev;
+ unsigned long flags;
+ char *out = buf;
-/* the memory required to hold the rings' buffer entries */
+ if (!ndev || !ndev->priv) {
+ printk(KERN_ERR "%s: invalid ptr!\n", __FUNCTION__);
+ return 0;
+ }
-#define RING_ENTRY_SIZE (2 * MAX_RING_DESCR * sizeof(struct ring_entry))
+ idev = ndev->priv;
-/********************************************************/
+ if (len < 8000)
+ return 0;
-/* just dump all registers */
+ out += sprintf(out, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION);
+ out += sprintf(out, "clksrc: %s\n",
+ (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK")
+ : ((clksrc==1)?"48MHz PLL":"autodetect"));
+ out += sprintf(out, "ringsize: tx=%d / rx=%d\n",
+ ringsize[0], ringsize[1]);
+ out += sprintf(out, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short");
+ out += sprintf(out, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits);
-static void vlsi_reg_debug(unsigned iobase, const char *s)
-{
- int i;
+ spin_lock_irqsave(&idev->lock, flags);
+ if (idev->pdev != NULL) {
+ out += vlsi_proc_pdev(idev->pdev, out, len - (out-buf));
+ if (idev->pdev->current_state == 0)
+ out += vlsi_proc_ndev(ndev, out, len - (out-buf));
+ else
+ out += sprintf(out, "\nPCI controller down - resume_ok = %d\n",
+ idev->resume_ok);
+ if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) {
+ out += sprintf(out, "\n--------- RX ring -----------\n\n");
+ out += vlsi_proc_ring(idev->rx_ring, out, len - (out-buf));
+ out += sprintf(out, "\n--------- TX ring -----------\n\n");
+ out += vlsi_proc_ring(idev->tx_ring, out, len - (out-buf));
+ }
+ }
+ out += sprintf(out, "\n");
+ spin_unlock_irqrestore(&idev->lock, flags);
- mb();
- printk(KERN_DEBUG "%s: ", s);
- for (i = 0; i < 0x20; i++)
- printk("%02x", (unsigned)inb((iobase+i)));
- printk("\n");
+ return out - buf;
}
-/********************************************************/
-
+static struct proc_dir_entry *vlsi_proc_root = NULL;
-static int vlsi_set_clock(struct pci_dev *pdev)
-{
- u8 clkctl, lock;
- int i, count;
+struct vlsi_proc_data {
+ int size;
+ char *data;
+};
- if (clksrc < 2) { /* auto or PLL: try PLL */
- clkctl = CLKCTL_NO_PD | CLKCTL_CLKSTP;
- pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
+/* most of the proc-fops code borrowed from usb/uhci */
- /* procedure to detect PLL lock synchronisation:
- * after 0.5 msec initial delay we expect to find 3 PLL lock
- * indications within 10 msec for successful PLL detection.
- */
- udelay(500);
- count = 0;
- for (i = 500; i <= 10000; i += 50) { /* max 10 msec */
- pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock);
- if (lock&CLKCTL_LOCK) {
- if (++count >= 3)
- break;
- }
- udelay(50);
- }
- if (count < 3) {
- if (clksrc == 1) { /* explicitly asked for PLL hence bail out */
- printk(KERN_ERR "%s: no PLL or failed to lock!\n",
- __FUNCTION__);
- clkctl = CLKCTL_CLKSTP;
- pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
- return -1;
- }
- else /* was: clksrc=0(auto) */
- clksrc = 3; /* fallback to 40MHz XCLK (OB800) */
+static int vlsi_proc_open(struct inode *inode, struct file *file)
+{
+ const struct proc_dir_entry *pde = PDE(inode);
+ struct net_device *ndev = pde->data;
+ vlsi_irda_dev_t *idev = ndev->priv;
+ struct vlsi_proc_data *procdata;
+ const int maxdata = 8000;
- printk(KERN_INFO "%s: PLL not locked, fallback to clksrc=%d\n",
- __FUNCTION__, clksrc);
- }
- else { /* got successful PLL lock */
- clksrc = 1;
- return 0;
- }
+ lock_kernel();
+ procdata = kmalloc(sizeof(*procdata), GFP_KERNEL);
+ if (!procdata) {
+ unlock_kernel();
+ return -ENOMEM;
+ }
+ procdata->data = kmalloc(maxdata, GFP_KERNEL);
+ if (!procdata->data) {
+ kfree(procdata);
+ unlock_kernel();
+ return -ENOMEM;
}
- /* we get here if either no PLL detected in auto-mode or
- the external clock source was explicitly specified */
-
- clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP;
- if (clksrc == 3)
- clkctl |= CLKCTL_XCKSEL;
- pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
+ down(&idev->sem);
+ procdata->size = vlsi_proc_print(ndev, procdata->data, maxdata);
+ up(&idev->sem);
- /* no way to test for working XCLK */
+ file->private_data = procdata;
return 0;
}
-
-static void vlsi_start_clock(struct pci_dev *pdev)
+static loff_t vlsi_proc_lseek(struct file *file, loff_t off, int whence)
{
- u8 clkctl;
-
- printk(KERN_INFO "%s: start clock using %s as input\n", __FUNCTION__,
- (clksrc&2)?((clksrc&1)?"40MHz XCLK":"48MHz XCLK"):"48MHz PLL");
- pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
- clkctl &= ~CLKCTL_CLKSTP;
- pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
-}
-
+ struct vlsi_proc_data *procdata;
+ loff_t new = -1;
-static void vlsi_stop_clock(struct pci_dev *pdev)
-{
- u8 clkctl;
+ lock_kernel();
+ procdata = file->private_data;
- pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
- clkctl |= CLKCTL_CLKSTP;
- pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
+ switch (whence) {
+ case 0:
+ new = off;
+ break;
+ case 1:
+ new = file->f_pos + off;
+ break;
+ }
+ if (new < 0 || new > procdata->size) {
+ unlock_kernel();
+ return -EINVAL;
+ }
+ unlock_kernel();
+ return (file->f_pos = new);
}
-
-static void vlsi_unset_clock(struct pci_dev *pdev)
+static ssize_t vlsi_proc_read(struct file *file, char *buf, size_t nbytes,
+ loff_t *ppos)
{
- u8 clkctl;
-
- pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
- if (!(clkctl&CLKCTL_CLKSTP))
- /* make sure clock is already stopped */
- vlsi_stop_clock(pdev);
+ struct vlsi_proc_data *procdata = file->private_data;
+ unsigned int pos;
+ unsigned int size;
- clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_NO_PD);
- pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
-}
+ pos = *ppos;
+ size = procdata->size;
+ if (pos >= size)
+ return 0;
+ if (nbytes >= size)
+ nbytes = size;
+ if (pos + nbytes > size)
+ nbytes = size - pos;
-/********************************************************/
+ if (!access_ok(VERIFY_WRITE, buf, nbytes))
+ return -EINVAL;
+ copy_to_user(buf, procdata->data + pos, nbytes);
-/* ### FIXME: don't use old virt_to_bus() anymore! */
+ *ppos += nbytes;
+ return nbytes;
+}
-static void vlsi_arm_rx(struct vlsi_ring *r)
+static int vlsi_proc_release(struct inode *inode, struct file *file)
{
- unsigned i;
- dma_addr_t ba;
+ struct vlsi_proc_data *procdata = file->private_data;
- for (i = 0; i < r->size; i++) {
- if (r->buf[i].data == NULL)
- BUG();
- ba = virt_to_bus(r->buf[i].data);
- rd_set_addr_status(r, i, ba, RD_STAT_ACTIVE);
- }
+ kfree(procdata->data);
+ kfree(procdata);
+
+ return 0;
}
-static int vlsi_alloc_ringbuf(struct vlsi_ring *r)
+static struct file_operations vlsi_proc_fops = {
+ open: vlsi_proc_open,
+ llseek: vlsi_proc_lseek,
+ read: vlsi_proc_read,
+ release: vlsi_proc_release,
+};
+#endif
+
+/********************************************************/
+
+static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap,
+ unsigned size, unsigned len, int dir)
{
+ struct vlsi_ring *r;
+ struct ring_descr *rd;
unsigned i, j;
+ dma_addr_t busaddr;
- r->head = r->tail = 0;
- r->mask = r->size - 1;
- for (i = 0; i < r->size; i++) {
- r->buf[i].skb = NULL;
- r->buf[i].data = kmalloc(XFER_BUF_SIZE, GFP_KERNEL|GFP_DMA);
- if (r->buf[i].data == NULL) {
+ if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */
+ return NULL;
+
+ r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL);
+ if (!r)
+ return NULL;
+ memset(r, 0, sizeof(*r));
+
+ r->pdev = pdev;
+ r->dir = dir;
+ r->len = len;
+ r->rd = (struct ring_descr *)(r+1);
+ r->mask = size - 1;
+ r->size = size;
+ atomic_set(&r->head, 0);
+ atomic_set(&r->tail, 0);
+
+ for (i = 0; i < size; i++) {
+ rd = r->rd + i;
+ memset(rd, 0, sizeof(*rd));
+ rd->hw = hwmap + i;
+ rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA);
+ if (rd->buf == NULL) {
for (j = 0; j < i; j++) {
- kfree(r->buf[j].data);
- r->buf[j].data = NULL;
+ rd = r->rd + j;
+ busaddr = rd_get_addr(rd);
+ rd_set_addr_status(rd, 0, 0);
+ if (busaddr)
+ pci_unmap_single(pdev, busaddr, len, dir);
+ kfree(rd->buf);
+ rd->buf = NULL;
}
- return -ENOMEM;
+ kfree(r);
+ return NULL;
+ }
+ busaddr = pci_map_single(pdev, rd->buf, len, dir);
+ if (!busaddr) {
+ printk(KERN_ERR "%s: failed to create PCI-MAP for %p",
+ __FUNCTION__, rd->buf);
+ BUG();
}
+ rd_set_addr_status(rd, busaddr, 0);
+ pci_dma_sync_single(pdev, busaddr, len, dir);
+ /* initially, the dma buffer is owned by the CPU */
+ rd->skb = NULL;
}
- return 0;
+ return r;
}
-static void vlsi_free_ringbuf(struct vlsi_ring *r)
+static int vlsi_free_ring(struct vlsi_ring *r)
{
+ struct ring_descr *rd;
unsigned i;
+ dma_addr_t busaddr;
for (i = 0; i < r->size; i++) {
- if (r->buf[i].data == NULL)
- continue;
- if (r->buf[i].skb) {
- dev_kfree_skb(r->buf[i].skb);
- r->buf[i].skb = NULL;
- }
- else
- kfree(r->buf[i].data);
- r->buf[i].data = NULL;
+ rd = r->rd + i;
+ if (rd->skb)
+ dev_kfree_skb_any(rd->skb);
+ busaddr = rd_get_addr(rd);
+ rd_set_addr_status(rd, 0, 0);
+ if (busaddr)
+ pci_unmap_single(r->pdev, busaddr, r->len, r->dir);
+ if (rd->buf)
+ kfree(rd->buf);
}
+ kfree(r);
+ return 0;
}
-
-static int vlsi_init_ring(vlsi_irda_dev_t *idev)
+static int vlsi_create_hwif(vlsi_irda_dev_t *idev)
{
- char *ringarea;
+ char *ringarea;
+ struct ring_descr_hw *hwmap;
+
+ idev->virtaddr = NULL;
+ idev->busaddr = 0;
- ringarea = pci_alloc_consistent(idev->pdev, RING_AREA_SIZE, &idev->busaddr);
+ ringarea = pci_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr);
if (!ringarea) {
printk(KERN_ERR "%s: insufficient memory for descriptor rings\n",
__FUNCTION__);
- return -ENOMEM;
+ goto out;
}
- memset(ringarea, 0, RING_AREA_SIZE);
+ memset(ringarea, 0, HW_RING_AREA_SIZE);
-#if 0
- printk(KERN_DEBUG "%s: (%d,%d)-ring %p / %p\n", __FUNCTION__,
- ringsize[0], ringsize[1], ringarea,
- (void *)(unsigned)idev->busaddr);
-#endif
+ hwmap = (struct ring_descr_hw *)ringarea;
+ idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1],
+ XFER_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ if (idev->rx_ring == NULL)
+ goto out_unmap;
+
+ hwmap += MAX_RING_DESCR;
+ idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0],
+ XFER_BUF_SIZE, PCI_DMA_TODEVICE);
+ if (idev->tx_ring == NULL)
+ goto out_free_rx;
- idev->rx_ring.size = ringsize[1];
- idev->rx_ring.hw = (struct ring_descr *)ringarea;
- if (!vlsi_alloc_ringbuf(&idev->rx_ring)) {
- idev->tx_ring.size = ringsize[0];
- idev->tx_ring.hw = idev->rx_ring.hw + MAX_RING_DESCR;
- if (!vlsi_alloc_ringbuf(&idev->tx_ring)) {
- idev->virtaddr = ringarea;
- return 0;
- }
- vlsi_free_ringbuf(&idev->rx_ring);
- }
+ idev->virtaddr = ringarea;
+ return 0;
- pci_free_consistent(idev->pdev, RING_AREA_SIZE,
- ringarea, idev->busaddr);
- printk(KERN_ERR "%s: insufficient memory for ring buffers\n",
- __FUNCTION__);
- return -1;
+out_free_rx:
+ vlsi_free_ring(idev->rx_ring);
+out_unmap:
+ idev->rx_ring = idev->tx_ring = NULL;
+ pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr);
+ idev->busaddr = 0;
+out:
+ return -ENOMEM;
}
+static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev)
+{
+ vlsi_free_ring(idev->rx_ring);
+ vlsi_free_ring(idev->tx_ring);
+ idev->rx_ring = idev->tx_ring = NULL;
+ if (idev->busaddr)
+ pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr);
-/********************************************************/
+ idev->virtaddr = NULL;
+ idev->busaddr = 0;
+ return 0;
+}
+/********************************************************/
-static int vlsi_set_baud(struct net_device *ndev)
+static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd)
{
+ u16 status;
+ int crclen, len = 0;
+ struct sk_buff *skb;
+ int ret = 0;
+ struct net_device *ndev = (struct net_device *)pci_get_drvdata(r->pdev);
vlsi_irda_dev_t *idev = ndev->priv;
- unsigned long flags;
- u16 nphyctl;
- unsigned iobase;
- u16 config;
- unsigned mode;
- int ret;
- int baudrate;
-
- baudrate = idev->new_baud;
- iobase = ndev->base_addr;
- printk(KERN_DEBUG "%s: %d -> %d\n", __FUNCTION__, idev->baud, idev->new_baud);
+ pci_dma_sync_single(r->pdev, rd_get_addr(rd), r->len, r->dir);
+ /* dma buffer now owned by the CPU */
+ status = rd_get_status(rd);
+ if (status & RD_RX_ERROR) {
+ if (status & RD_RX_OVER)
+ ret |= VLSI_RX_OVER;
+ if (status & RD_RX_LENGTH)
+ ret |= VLSI_RX_LENGTH;
+ if (status & RD_RX_PHYERR)
+ ret |= VLSI_RX_FRAME;
+ if (status & RD_RX_CRCERR)
+ ret |= VLSI_RX_CRC;
+ }
+ else {
+ len = rd_get_count(rd);
+ crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16);
+ len -= crclen; /* remove trailing CRC */
+ if (len <= 0) {
+ printk(KERN_ERR "%s: strange frame (len=%d)\n",
+ __FUNCTION__, len);
+ ret |= VLSI_RX_DROP;
+ }
+ else if (!rd->skb) {
+ printk(KERN_ERR "%s: rx packet dropped\n", __FUNCTION__);
+ ret |= VLSI_RX_DROP;
+ }
+ else {
+ skb = rd->skb;
+ rd->skb = NULL;
+ skb->dev = ndev;
+ memcpy(skb_put(skb,len), rd->buf, len);
+ skb->mac.raw = skb->data;
+ if (in_interrupt())
+ netif_rx(skb);
+ else
+ netif_rx_ni(skb);
+ ndev->last_rx = jiffies;
+ }
+ }
+ rd_set_status(rd, 0);
+ rd_set_count(rd, 0);
+ /* buffer still owned by CPU */
- spin_lock_irqsave(&idev->lock, flags);
+ return (ret) ? -ret : len;
+}
- outw(0, iobase+VLSI_PIO_IRENABLE);
+static void vlsi_fill_rx(struct vlsi_ring *r)
+{
+ struct ring_descr *rd;
- if (baudrate == 4000000) {
- mode = IFF_FIR;
- config = IRCFG_FIR;
- nphyctl = PHYCTL_FIR;
+ for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) {
+ if (rd_is_active(rd)) {
+ BUG();
+ break;
+ }
+ if (!rd->skb) {
+ rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE);
+ if (rd->skb) {
+ skb_reserve(rd->skb,1);
+ rd->skb->protocol = htons(ETH_P_IRDA);
+ }
+ else
+ break; /* probably not worth logging? */
+ }
+ /* give dma buffer back to busmaster */
+ pci_dma_prep_single(r->pdev, rd_get_addr(rd), r->len, r->dir);
+ rd_activate(rd);
}
- else if (baudrate == 1152000) {
- mode = IFF_MIR;
- config = IRCFG_MIR | IRCFG_CRC16;
+}
+
+static void vlsi_rx_interrupt(struct net_device *ndev)
+{
+ vlsi_irda_dev_t *idev = ndev->priv;
+ struct vlsi_ring *r = idev->rx_ring;
+ struct ring_descr *rd;
+ int ret;
+
+ for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
+
+ if (rd_is_active(rd))
+ break;
+
+ ret = vlsi_process_rx(r, rd);
+
+ if (ret < 0) {
+ ret = -ret;
+ idev->stats.rx_errors++;
+ if (ret & VLSI_RX_DROP)
+ idev->stats.rx_dropped++;
+ if (ret & VLSI_RX_OVER)
+ idev->stats.rx_over_errors++;
+ if (ret & VLSI_RX_LENGTH)
+ idev->stats.rx_length_errors++;
+ if (ret & VLSI_RX_FRAME)
+ idev->stats.rx_frame_errors++;
+ if (ret & VLSI_RX_CRC)
+ idev->stats.rx_crc_errors++;
+ }
+ else if (ret > 0) {
+ idev->stats.rx_packets++;
+ idev->stats.rx_bytes += ret;
+ }
+ }
+
+ do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */
+
+ vlsi_fill_rx(r);
+
+ if (ring_first(r) == NULL) {
+ /* we are in big trouble, if this should ever happen */
+ printk(KERN_ERR "%s: rx ring exhausted!\n", __FUNCTION__);
+ vlsi_ring_debug(r);
+ }
+ else
+ outw(0, ndev->base_addr+VLSI_PIO_PROMPT);
+}
+
+/* caller must have stopped the controller from busmastering */
+
+static void vlsi_unarm_rx(vlsi_irda_dev_t *idev)
+{
+ struct vlsi_ring *r = idev->rx_ring;
+ struct ring_descr *rd;
+ int ret;
+
+ for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
+
+ ret = 0;
+ if (rd_is_active(rd)) {
+ rd_set_status(rd, 0);
+ if (rd_get_count(rd)) {
+ printk(KERN_INFO "%s - dropping rx packet\n", __FUNCTION__);
+ ret = -VLSI_RX_DROP;
+ }
+ rd_set_count(rd, 0);
+ pci_dma_sync_single(r->pdev, rd_get_addr(rd), r->len, r->dir);
+ if (rd->skb) {
+ dev_kfree_skb_any(rd->skb);
+ rd->skb = NULL;
+ }
+ }
+ else
+ ret = vlsi_process_rx(r, rd);
+
+ if (ret < 0) {
+ ret = -ret;
+ idev->stats.rx_errors++;
+ if (ret & VLSI_RX_DROP)
+ idev->stats.rx_dropped++;
+ if (ret & VLSI_RX_OVER)
+ idev->stats.rx_over_errors++;
+ if (ret & VLSI_RX_LENGTH)
+ idev->stats.rx_length_errors++;
+ if (ret & VLSI_RX_FRAME)
+ idev->stats.rx_frame_errors++;
+ if (ret & VLSI_RX_CRC)
+ idev->stats.rx_crc_errors++;
+ }
+ else if (ret > 0) {
+ idev->stats.rx_packets++;
+ idev->stats.rx_bytes += ret;
+ }
+ }
+}
+
+/********************************************************/
+
+static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd)
+{
+ u16 status;
+ int len;
+ int ret;
+
+ pci_dma_sync_single(r->pdev, rd_get_addr(rd), r->len, r->dir);
+ /* dma buffer now owned by the CPU */
+ status = rd_get_status(rd);
+ if (status & RD_TX_UNDRN)
+ ret = VLSI_TX_FIFO;
+ else
+ ret = 0;
+ rd_set_status(rd, 0);
+
+ if (rd->skb) {
+ len = rd->skb->len;
+ dev_kfree_skb_any(rd->skb);
+ rd->skb = NULL;
+ }
+ else /* tx-skb already freed? - should never happen */
+ len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */
+
+ rd_set_count(rd, 0);
+ /* dma buffer still owned by the CPU */
+
+ return (ret) ? -ret : len;
+}
+
+static int vlsi_set_baud(struct net_device *ndev, int dolock)
+{
+ vlsi_irda_dev_t *idev = ndev->priv;
+ unsigned long flags;
+ u16 nphyctl;
+ unsigned iobase;
+ u16 config;
+ unsigned mode;
+ unsigned idle_retry;
+ int ret;
+ int baudrate;
+ int fifocnt;
+
+ baudrate = idev->new_baud;
+ iobase = ndev->base_addr;
+#if 0
+ printk(KERN_DEBUG "%s: %d -> %d\n", __FUNCTION__, idev->baud, idev->new_baud);
+#endif
+ if (baudrate == 4000000) {
+ mode = IFF_FIR;
+ config = IRCFG_FIR;
+ nphyctl = PHYCTL_FIR;
+ }
+ else if (baudrate == 1152000) {
+ mode = IFF_MIR;
+ config = IRCFG_MIR | IRCFG_CRC16;
nphyctl = PHYCTL_MIR(clksrc==3);
}
else {
mode = IFF_SIR;
- config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY;
+ config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY;
switch(baudrate) {
default:
printk(KERN_ERR "%s: undefined baudrate %d - fallback to 9600!\n",
@@ -473,6 +893,32 @@
}
}
+ if (dolock)
+ spin_lock_irqsave(&idev->lock, flags);
+ else
+ flags = 0xdead; /* prevent bogus warning about possible uninitialized use */
+
+ for (idle_retry=0; idle_retry < 100; idle_retry++) {
+ fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
+ if (fifocnt == 0)
+ break;
+ if (!idle_retry)
+ printk(KERN_WARNING "%s: waiting for rx fifo to become empty(%d)\n",
+ __FUNCTION__, fifocnt);
+ if (dolock) {
+ spin_unlock_irqrestore(&idev->lock, flags);
+ udelay(100);
+ spin_lock_irqsave(&idev->lock, flags);
+ }
+ else
+ udelay(100);
+ }
+ if (fifocnt != 0)
+ printk(KERN_ERR "%s: rx fifo not empty(%d)\n", __FUNCTION__, fifocnt);
+
+ outw(0, iobase+VLSI_PIO_IRENABLE);
+ wmb();
+
config |= IRCFG_MSTR | IRCFG_ENRX;
outw(config, iobase+VLSI_PIO_IRCFG);
@@ -480,10 +926,12 @@
outw(nphyctl, iobase+VLSI_PIO_NPHYCTL);
wmb();
outw(IRENABLE_IREN, iobase+VLSI_PIO_IRENABLE);
+ mb();
- /* chip fetches IRCFG on next rising edge of its 8MHz clock */
+ udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */
+
+ /* read back settings for validation */
- mb();
config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK;
if (mode == IFF_FIR)
@@ -493,7 +941,6 @@
else
config ^= IRENABLE_SIR_ON;
-
if (config != (IRENABLE_IREN|IRENABLE_ENRXST)) {
printk(KERN_ERR "%s: failed to set %s mode!\n", __FUNCTION__,
(mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR"));
@@ -512,7 +959,8 @@
ret = 0;
}
}
- spin_unlock_irqrestore(&idev->lock, flags);
+ if (dolock)
+ spin_unlock_irqrestore(&idev->lock, flags);
if (ret)
vlsi_reg_debug(iobase,__FUNCTION__);
@@ -520,278 +968,396 @@
return ret;
}
+static inline int vlsi_set_baud_lock(struct net_device *ndev)
+{
+ return vlsi_set_baud(ndev, 1);
+}
+static inline int vlsi_set_baud_nolock(struct net_device *ndev)
+{
+ return vlsi_set_baud(ndev, 0);
+}
-static int vlsi_init_chip(struct net_device *ndev)
+static int vlsi_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
vlsi_irda_dev_t *idev = ndev->priv;
- unsigned iobase;
- u16 ptr;
-
- iobase = ndev->base_addr;
-
- outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */
-
- outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */
+ struct vlsi_ring *r = idev->tx_ring;
+ struct ring_descr *rd;
+ unsigned long flags;
+ unsigned iobase = ndev->base_addr;
+ u8 status;
+ u16 config;
+ int mtt;
+ int len, speed;
+ struct timeval now, ready;
- /* disable everything, particularly IRCFG_MSTR - which resets the RING_PTR */
+ speed = irda_get_next_speed(skb);
+ if (speed != -1 && speed != idev->baud) {
+ netif_stop_queue(ndev);
+ idev->new_baud = speed;
+ if (!skb->len) {
+ dev_kfree_skb_any(skb);
- outw(0, iobase+VLSI_PIO_IRCFG);
- wmb();
- outw(IRENABLE_IREN, iobase+VLSI_PIO_IRENABLE);
+ /* due to the completely asynch tx operation we might have
+ * IrLAP racing with the hardware here, f.e. if the controller
+ * is just sending the last packet with current speed while
+ * the LAP is already switching the speed using synchronous
+ * len=0 packet. Immediate execution would lead to hw lockup
+ * requiring a powercycle to reset. Good candidate to trigger
+ * this is the final UA:RSP packet after receiving a DISC:CMD
+ * when getting the LAP down.
+ * Note that we are not protected by the queue_stop approach
+ * because the final UA:RSP arrives _without_ request to apply
+ * new-speed-after-this-packet - hence the driver doesn't know
+ * this was the last packet and doesn't stop the queue. So the
+ * forced switch to default speed from LAP gets through as fast
+ * as only some 10 usec later while the UA:RSP is still processed
+ * by the hardware and we would get screwed.
+ * Note: no locking required since we (netdev->xmit) are the only
+ * supplier for tx and the network layer provides serialization
+ */
+ spin_lock_irqsave(&idev->lock, flags);
+ if (ring_first(idev->tx_ring) == NULL) {
+ /* no race - tx-ring already empty */
+ vlsi_set_baud_nolock(ndev);
+ netif_wake_queue(ndev);
+ }
+ else
+ ; /* keep the speed change pending like it would
+ * for any len>0 packet. tx completion interrupt
+ * will apply it when the tx ring becomes empty.
+ */
+ spin_unlock_irqrestore(&idev->lock, flags);
+ return 0;
+ }
+ status = RD_TX_CLRENTX; /* stop tx-ring after this frame */
+ }
+ else
+ status = 0;
- mb();
+ if (skb->len == 0) {
+ printk(KERN_ERR "%s: dropping len=0 packet\n", __FUNCTION__);
+ goto drop;
+ }
- outw(0, iobase+VLSI_PIO_IRENABLE);
+ /* sanity checks - should never happen!
+ * simply BUGging the violation and dropping the packet
+ */
- outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */
+ rd = ring_last(r);
+ if (!rd) { /* ring full - queue should have been stopped! */
+ BUG();
+ goto drop;
+ }
- outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE);
+ if (rd_is_active(rd)) { /* entry still owned by hw! */
+ BUG();
+ goto drop;
+ }
- outw(TX_RX_TO_RINGSIZE(idev->tx_ring.size, idev->rx_ring.size),
- iobase+VLSI_PIO_RINGSIZE);
+ if (!rd->buf) { /* no memory for this tx entry - weird! */
+ BUG();
+ goto drop;
+ }
- ptr = inw(iobase+VLSI_PIO_RINGPTR);
- idev->rx_ring.head = idev->rx_ring.tail = RINGPTR_GET_RX(ptr);
- idev->tx_ring.head = idev->tx_ring.tail = RINGPTR_GET_TX(ptr);
+ if (rd->skb) { /* hm, associated old skb still there */
+ BUG();
+ goto drop;
+ }
- outw(IRCFG_MSTR, iobase+VLSI_PIO_IRCFG); /* ready for memory access */
- wmb();
- outw(IRENABLE_IREN, iobase+VLSI_PIO_IRENABLE);
+ /* tx buffer already owned by CPU due to pci_dma_sync_single() either
+ * after initial pci_map_single or after subsequent tx-completion
+ */
- mb();
+ if (idev->mode == IFF_SIR) {
+ status |= RD_TX_DISCRC; /* no hw-crc creation */
+ len = async_wrap_skb(skb, rd->buf, r->len);
- idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */
- vlsi_set_baud(ndev);
+ /* Some rare worst case situation in SIR mode might lead to
+ * potential buffer overflow. The wrapper detects this, returns
+ * with a shortened frame (without FCS/EOF) but doesn't provide
+ * any error indication about the invalid packet which we are
+ * going to transmit.
+ * Therefore we log if the buffer got filled to the point, where the
+ * wrapper would abort, i.e. when there are less than 5 bytes left to
+ * allow appending the FCS/EOF.
+ */
- outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */
- wmb();
+ if (len >= r->len-5)
+ printk(KERN_WARNING "%s: possible buffer overflow with SIR wrapping!\n",
+ __FUNCTION__);
+ }
+ else {
+ /* hw deals with MIR/FIR mode wrapping */
+ status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */
+ len = skb->len;
+ if (len > r->len) {
+ printk(KERN_ERR "%s: no space - skb too big (%d)\n",
+ __FUNCTION__, skb->len);
+ goto drop;
+ }
+ else
+ memcpy(rd->buf, skb->data, len);
+ }
- /* DO NOT BLINDLY ENABLE IRINTR_ACTEN!
- * basically every received pulse fires an ACTIVITY-INT
- * leading to >>1000 INT's per second instead of few 10
- */
+ /* do mtt delay before we need to disable interrupts! */
- outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR);
- wmb();
+ if ((mtt = irda_get_mtt(skb)) > 0) {
+
+ ready.tv_usec = idev->last_rx.tv_usec + mtt;
+ ready.tv_sec = idev->last_rx.tv_sec;
+ if (ready.tv_usec >= 1000000) {
+ ready.tv_usec -= 1000000;
+ ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */
+ }
+ for(;;) {
+ do_gettimeofday(&now);
+ if (now.tv_sec > ready.tv_sec
+ || (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec))
+ break;
+ udelay(100);
+ /* must not sleep here - we are called under xmit_lock! */
+ }
+ }
- return 0;
-}
+ rd->skb = skb; /* remember skb for tx-complete stats */
+ rd_set_count(rd, len);
+ rd_set_status(rd, status); /* not yet active! */
-/**************************************************************/
+ /* give dma buffer back to busmaster-hw (flush caches to make
+ * CPU-driven changes visible from the pci bus).
+ */
+ pci_dma_prep_single(r->pdev, rd_get_addr(rd), r->len, r->dir);
-static void vlsi_refill_rx(struct vlsi_ring *r)
-{
- do {
- if (rd_is_active(r, r->head))
- BUG();
- rd_activate(r, r->head);
- ring_put(r);
- } while (r->head != r->tail);
-}
+/*
+ * We need to disable IR output in order to switch to TX mode.
+ * Better not do this blindly anytime we want to transmit something
+ * because TX may already run. However we are racing with the controller
+ * which may stop TX at any time when fetching an inactive descriptor
+ * or one with CLR_ENTX set. So we switch on TX only, if TX was not running
+ * _after_ the new descriptor was activated on the ring. This ensures
+ * we will either find TX already stopped or we can be sure, there
+ * will be a TX-complete interrupt even if the chip stopped doing
+ * TX just after we found it still running. The ISR will then find
+ * the non-empty ring and restart TX processing. The enclosing
+ * spinlock provides the correct serialization to prevent race with isr.
+ */
+ spin_lock_irqsave(&idev->lock,flags);
-static int vlsi_rx_interrupt(struct net_device *ndev)
-{
- vlsi_irda_dev_t *idev = ndev->priv;
- struct vlsi_ring *r;
- int len;
- u8 status;
- struct sk_buff *skb;
- int crclen;
+ rd_activate(rd);
- r = &idev->rx_ring;
- while (!rd_is_active(r, r->tail)) {
+ if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
+ int fifocnt;
- status = rd_get_status(r, r->tail);
- if (status & RX_STAT_ERROR) {
- idev->stats.rx_errors++;
- if (status & RX_STAT_OVER)
- idev->stats.rx_over_errors++;
- if (status & RX_STAT_LENGTH)
- idev->stats.rx_length_errors++;
- if (status & RX_STAT_PHYERR)
- idev->stats.rx_frame_errors++;
- if (status & RX_STAT_CRCERR)
- idev->stats.rx_crc_errors++;
- }
- else {
- len = rd_get_count(r, r->tail);
- crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16);
- if (len < crclen)
- printk(KERN_ERR "%s: strange frame (len=%d)\n",
- __FUNCTION__, len);
- else
- len -= crclen; /* remove trailing CRC */
+ fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
+ if (fifocnt != 0)
+ printk(KERN_WARNING "%s: rx fifo not empty(%d)\n",
+ __FUNCTION__, fifocnt);
- skb = dev_alloc_skb(len+1);
- if (skb) {
- skb->dev = ndev;
- skb_reserve(skb,1);
- memcpy(skb_put(skb,len), r->buf[r->tail].data, len);
- idev->stats.rx_packets++;
- idev->stats.rx_bytes += len;
- skb->mac.raw = skb->data;
- skb->protocol = htons(ETH_P_IRDA);
- netif_rx(skb);
- ndev->last_rx = jiffies;
- }
- else {
- idev->stats.rx_dropped++;
- printk(KERN_ERR "%s: rx packet dropped\n", __FUNCTION__);
- }
- }
- rd_set_count(r, r->tail, 0);
- rd_set_status(r, r->tail, 0);
- ring_get(r);
- if (r->tail == r->head) {
- printk(KERN_WARNING "%s: rx ring exhausted\n", __FUNCTION__);
- break;
- }
+ config = inw(iobase+VLSI_PIO_IRCFG);
+ rmb();
+ outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
+ mb();
+ outw(0, iobase+VLSI_PIO_PROMPT);
}
+ ndev->trans_start = jiffies;
- do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */
-
- vlsi_refill_rx(r);
-
- mb();
- outw(0, ndev->base_addr+VLSI_PIO_PROMPT);
+ if (ring_put(r) == NULL) {
+ netif_stop_queue(ndev);
+ printk(KERN_DEBUG "%s: tx ring full - queue stopped\n", __FUNCTION__);
+ }
+ spin_unlock_irqrestore(&idev->lock, flags);
return 0;
-}
+drop:
+ dev_kfree_skb_any(skb);
+ idev->stats.tx_errors++;
+ idev->stats.tx_dropped++;
+ return 1;
+}
-static int vlsi_tx_interrupt(struct net_device *ndev)
+static void vlsi_tx_interrupt(struct net_device *ndev)
{
vlsi_irda_dev_t *idev = ndev->priv;
- struct vlsi_ring *r;
+ struct vlsi_ring *r = idev->tx_ring;
+ struct ring_descr *rd;
unsigned iobase;
int ret;
u16 config;
- u16 status;
- r = &idev->tx_ring;
- while (!rd_is_active(r, r->tail)) {
- if (r->tail == r->head)
- break; /* tx ring empty - nothing to send anymore */
+ for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
- status = rd_get_status(r, r->tail);
- if (status & TX_STAT_UNDRN) {
+ if (rd_is_active(rd))
+ break;
+
+ ret = vlsi_process_tx(r, rd);
+
+ if (ret < 0) {
+ ret = -ret;
idev->stats.tx_errors++;
- idev->stats.tx_fifo_errors++;
+ if (ret & VLSI_TX_DROP)
+ idev->stats.tx_dropped++;
+ if (ret & VLSI_TX_FIFO)
+ idev->stats.tx_fifo_errors++;
}
- else {
+ else if (ret > 0){
idev->stats.tx_packets++;
- idev->stats.tx_bytes += rd_get_count(r, r->tail); /* not correct for SIR */
+ idev->stats.tx_bytes += ret;
}
- rd_set_count(r, r->tail, 0);
- rd_set_status(r, r->tail, 0);
- if (r->buf[r->tail].skb) {
- rd_set_addr_status(r, r->tail, 0, 0);
- dev_kfree_skb(r->buf[r->tail].skb);
- r->buf[r->tail].skb = NULL;
- r->buf[r->tail].data = NULL;
- }
- ring_get(r);
}
- ret = 0;
- iobase = ndev->base_addr;
+ if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */
+ vlsi_set_baud_lock(ndev);
- if (r->head == r->tail) { /* tx ring empty: re-enable rx */
+ iobase = ndev->base_addr;
+ config = inw(iobase+VLSI_PIO_IRCFG);
- outw(0, iobase+VLSI_PIO_IRENABLE);
- config = inw(iobase+VLSI_PIO_IRCFG);
- mb();
+ if (rd == NULL) /* tx ring empty: re-enable rx */
outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG);
- wmb();
- outw(IRENABLE_IREN, iobase+VLSI_PIO_IRENABLE);
+
+ else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
+ int fifocnt;
+
+ fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
+ if (fifocnt != 0)
+ printk(KERN_WARNING "%s: rx fifo not empty(%d)\n",
+ __FUNCTION__, fifocnt);
+ outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
}
- else
- ret = 1; /* no speed-change-check */
- mb();
outw(0, iobase+VLSI_PIO_PROMPT);
- if (netif_queue_stopped(ndev)) {
+ if (netif_queue_stopped(ndev) && !idev->new_baud) {
netif_wake_queue(ndev);
printk(KERN_DEBUG "%s: queue awoken\n", __FUNCTION__);
}
- return ret;
}
+/* caller must have stopped the controller from busmastering */
-#if 0 /* disable ACTIVITY handling for now */
-
-static int vlsi_act_interrupt(struct net_device *ndev)
+static void vlsi_unarm_tx(vlsi_irda_dev_t *idev)
{
- printk(KERN_DEBUG "%s\n", __FUNCTION__);
- return 0;
+ struct vlsi_ring *r = idev->tx_ring;
+ struct ring_descr *rd;
+ int ret;
+
+ for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
+
+ ret = 0;
+ if (rd_is_active(rd)) {
+ rd_set_status(rd, 0);
+ rd_set_count(rd, 0);
+ pci_dma_sync_single(r->pdev, rd_get_addr(rd), r->len, r->dir);
+ if (rd->skb) {
+ dev_kfree_skb_any(rd->skb);
+ rd->skb = NULL;
+ }
+ printk(KERN_INFO "%s - dropping tx packet\n", __FUNCTION__);
+ ret = -VLSI_TX_DROP;
+ }
+ else
+ ret = vlsi_process_tx(r, rd);
+
+ if (ret < 0) {
+ ret = -ret;
+ idev->stats.tx_errors++;
+ if (ret & VLSI_TX_DROP)
+ idev->stats.tx_dropped++;
+ if (ret & VLSI_TX_FIFO)
+ idev->stats.tx_fifo_errors++;
+ }
+ else if (ret > 0){
+ idev->stats.tx_packets++;
+ idev->stats.tx_bytes += ret;
+ }
+ }
+
}
-#endif
-static void vlsi_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
-{
- struct net_device *ndev = dev_instance;
- vlsi_irda_dev_t *idev = ndev->priv;
- unsigned iobase;
- u8 irintr;
- int boguscount = 32;
- int no_speed_check = 0;
- unsigned got_act;
- unsigned long flags;
+/********************************************************/
- got_act = 0;
- iobase = ndev->base_addr;
- spin_lock_irqsave(&idev->lock,flags);
- do {
- irintr = inb(iobase+VLSI_PIO_IRINTR);
- rmb();
- outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */
- wmb();
+static int vlsi_start_clock(struct pci_dev *pdev)
+{
+ u8 clkctl, lock;
+ int i, count;
- if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */
- break;
+ if (clksrc < 2) { /* auto or PLL: try PLL */
+ clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP;
+ pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
-// vlsi_reg_debug(iobase,__FUNCTION__);
+ /* procedure to detect PLL lock synchronisation:
+ * after 0.5 msec initial delay we expect to find 3 PLL lock
+ * indications within 10 msec for successful PLL detection.
+ */
+ udelay(500);
+ count = 0;
+ for (i = 500; i <= 10000; i += 50) { /* max 10 msec */
+ pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock);
+ if (lock&CLKCTL_LOCK) {
+ if (++count >= 3)
+ break;
+ }
+ udelay(50);
+ }
+ if (count < 3) {
+ if (clksrc == 1) { /* explicitly asked for PLL hence bail out */
+ printk(KERN_ERR "%s: no PLL or failed to lock!\n",
+ __FUNCTION__);
+ clkctl = CLKCTL_CLKSTP;
+ pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
+ return -1;
+ }
+ else /* was: clksrc=0(auto) */
+ clksrc = 3; /* fallback to 40MHz XCLK (OB800) */
- if (irintr&IRINTR_RPKTINT)
- no_speed_check |= vlsi_rx_interrupt(ndev);
+ printk(KERN_INFO "%s: PLL not locked, fallback to clksrc=%d\n",
+ __FUNCTION__, clksrc);
+ }
+ else
+ clksrc = 1; /* got successful PLL lock */
+ }
- if (irintr&IRINTR_TPKTINT)
- no_speed_check |= vlsi_tx_interrupt(ndev);
+ if (clksrc != 1) {
+ /* we get here if either no PLL detected in auto-mode or
+ an external clock source was explicitly specified */
-#if 0 /* disable ACTIVITY handling for now */
+ clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP;
+ if (clksrc == 3)
+ clkctl |= CLKCTL_XCKSEL;
+ pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
- if (got_act && irintr==IRINTR_ACTIVITY) /* nothing new */
- break;
+ /* no way to test for working XCLK */
+ }
+ else
+ pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
- if ((irintr&IRINTR_ACTIVITY) && !(irintr^IRINTR_ACTIVITY) ) {
- no_speed_check |= vlsi_act_interrupt(ndev);
- got_act = 1;
- }
-#endif
- if (irintr & ~(IRINTR_RPKTINT|IRINTR_TPKTINT|IRINTR_ACTIVITY))
- printk(KERN_DEBUG "%s: IRINTR = %02x\n",
- __FUNCTION__, (unsigned)irintr);
-
- } while (--boguscount > 0);
- spin_unlock_irqrestore(&idev->lock,flags);
+ /* ok, now going to connect the chip with the clock source */
- if (boguscount <= 0)
- printk(KERN_ERR "%s: too much work in interrupt!\n", __FUNCTION__);
+ clkctl &= ~CLKCTL_CLKSTP;
+ pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
- else if (!no_speed_check) {
- if (idev->new_baud)
- vlsi_set_baud(ndev);
- }
+ return 0;
}
+static void vlsi_stop_clock(struct pci_dev *pdev)
+{
+ u8 clkctl;
-/**************************************************************/
+ /* disconnect chip from clock source */
+ pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
+ clkctl |= CLKCTL_CLKSTP;
+ pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
+ /* disable all clock sources */
+ clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV);
+ pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
+}
+
+/********************************************************/
/* writing all-zero to the VLSI PCI IO register area seems to prevent
* some occasional situations where the hardware fails (symptoms are
@@ -811,283 +1377,150 @@
outw(0, iobase + i);
}
-
-static int vlsi_open(struct net_device *ndev)
+static int vlsi_init_chip(struct pci_dev *pdev)
{
+ struct net_device *ndev = pci_get_drvdata(pdev);
vlsi_irda_dev_t *idev = ndev->priv;
- struct pci_dev *pdev = idev->pdev;
- int err;
- char hwname[32];
-
- if (pci_request_regions(pdev,drivername)) {
- printk(KERN_ERR "%s: io resource busy\n", __FUNCTION__);
- return -EAGAIN;
- }
-
- /* under some rare occasions the chip apparently comes up
- * with IRQ's pending. So we get interrupts invoked much too early
- * which will immediately kill us again :-(
- * so we better w/c pending IRQ and disable them all
- */
-
- outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR);
+ unsigned iobase;
+ u16 ptr;
- if (request_irq(ndev->irq, vlsi_interrupt, SA_SHIRQ,
- drivername, ndev)) {
- printk(KERN_ERR "%s: couldn't get IRQ: %d\n",
- __FUNCTION__, ndev->irq);
- pci_release_regions(pdev);
- return -EAGAIN;
- }
- printk(KERN_INFO "%s: got resources for %s - irq=%d / io=%04lx\n",
- __FUNCTION__, ndev->name, ndev->irq, ndev->base_addr );
+ /* start the clock and clean the registers */
- if (vlsi_set_clock(pdev)) {
+ if (vlsi_start_clock(pdev)) {
printk(KERN_ERR "%s: no valid clock source\n",
__FUNCTION__);
- free_irq(ndev->irq,ndev);
- pci_release_regions(pdev);
- return -EIO;
- }
-
- vlsi_start_clock(pdev);
-
- vlsi_clear_regs(ndev->base_addr);
-
- err = vlsi_init_ring(idev);
- if (err) {
- vlsi_unset_clock(pdev);
- free_irq(ndev->irq,ndev);
- pci_release_regions(pdev);
- return err;
+ pci_disable_device(pdev);
+ return -1;
}
-
- vlsi_init_chip(ndev);
-
- printk(KERN_INFO "%s: IrPHY setup: %d baud (%s), %s SIR-pulses\n",
- __FUNCTION__, idev->baud,
- (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR"),
- (sirpulse)?"3/16 bittime":"short");
-
- vlsi_arm_rx(&idev->rx_ring);
-
- do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
-
- sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr);
- idev->irlap = irlap_open(ndev,&idev->qos,hwname);
-
- netif_start_queue(ndev);
- outw(0, ndev->base_addr+VLSI_PIO_PROMPT); /* kick hw state machine */
-
- printk(KERN_INFO "%s: device %s operational using (%d,%d) tx,rx-ring\n",
- __FUNCTION__, ndev->name, ringsize[0], ringsize[1]);
-
- return 0;
-}
-
-
-static int vlsi_close(struct net_device *ndev)
-{
- vlsi_irda_dev_t *idev = ndev->priv;
- struct pci_dev *pdev = idev->pdev;
- u8 cmd;
- unsigned iobase;
-
-
iobase = ndev->base_addr;
- netif_stop_queue(ndev);
+ vlsi_clear_regs(iobase);
- if (idev->irlap)
- irlap_close(idev->irlap);
- idev->irlap = NULL;
-
- outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending + disable further IRQ */
- wmb();
- outw(0, iobase+VLSI_PIO_IRENABLE);
- outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */
- wmb();
- outw(IRENABLE_IREN, iobase+VLSI_PIO_IRENABLE);
- mb(); /* ... from now on */
+ outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */
- outw(0, iobase+VLSI_PIO_IRENABLE);
- wmb();
+ outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */
- vlsi_clear_regs(ndev->base_addr);
+ /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */
- vlsi_stop_clock(pdev);
+ outw(0, iobase+VLSI_PIO_IRCFG);
+ wmb();
- vlsi_unset_clock(pdev);
+ outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */
- free_irq(ndev->irq,ndev);
+ outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE);
- vlsi_free_ringbuf(&idev->rx_ring);
- vlsi_free_ringbuf(&idev->tx_ring);
+ outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size),
+ iobase+VLSI_PIO_RINGSIZE);
- if (idev->busaddr)
- pci_free_consistent(idev->pdev,RING_AREA_SIZE,idev->virtaddr,idev->busaddr);
+ ptr = inw(iobase+VLSI_PIO_RINGPTR);
+ atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr));
+ atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr));
+ atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr));
+ atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr));
- idev->virtaddr = NULL;
- idev->busaddr = 0;
+ vlsi_set_baud_lock(ndev); /* idev->new_baud used as provided by caller */
- pci_read_config_byte(pdev, PCI_COMMAND, &cmd);
- cmd &= ~PCI_COMMAND_MASTER;
- pci_write_config_byte(pdev, PCI_COMMAND, cmd);
+ outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */
+ wmb();
- pci_release_regions(pdev);
+ /* DO NOT BLINDLY ENABLE IRINTR_ACTEN!
+ * basically every received pulse fires an ACTIVITY-INT
+ * leading to >>1000 INT's per second instead of few 10
+ */
- printk(KERN_INFO "%s: device %s stopped\n", __FUNCTION__, ndev->name);
+ outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR);
return 0;
}
-static struct net_device_stats * vlsi_get_stats(struct net_device *ndev)
-{
- vlsi_irda_dev_t *idev = ndev->priv;
-
- return &idev->stats;
-}
-
-static int vlsi_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+static int vlsi_start_hw(vlsi_irda_dev_t *idev)
{
- vlsi_irda_dev_t *idev = ndev->priv;
- struct vlsi_ring *r;
- unsigned long flags;
- unsigned iobase;
- u8 status;
- u16 config;
- int mtt;
- int len, speed;
- struct timeval now, ready;
-
+ struct pci_dev *pdev = idev->pdev;
+ struct net_device *ndev = pci_get_drvdata(pdev);
+ unsigned iobase = ndev->base_addr;
+ u8 byte;
- status = 0;
+ /* we don't use the legacy UART, disable its address decoding */
- speed = irda_get_next_speed(skb);
+ pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte);
+ byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST);
+ pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte);
- if (speed != -1 && speed != idev->baud) {
- idev->new_baud = speed;
- if (!skb->len) {
- dev_kfree_skb(skb);
- vlsi_set_baud(ndev);
- return 0;
- }
- status = TX_STAT_CLRENTX; /* stop tx-ring after this frame */
- }
+ /* enable PCI busmaster access to our 16MB page */
- if (skb->len == 0) {
- printk(KERN_ERR "%s: blocking 0-size packet???\n",
- __FUNCTION__);
- dev_kfree_skb(skb);
- return 0;
- }
+ pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE);
+ pci_set_master(pdev);
- r = &idev->tx_ring;
+ vlsi_init_chip(pdev);
- if (rd_is_active(r, r->head))
- BUG();
+ vlsi_fill_rx(idev->rx_ring);
- if (idev->mode == IFF_SIR) {
- status |= TX_STAT_DISCRC;
- len = async_wrap_skb(skb, r->buf[r->head].data, XFER_BUF_SIZE);
- }
- else { /* hw deals with MIR/FIR mode */
- len = skb->len;
- memcpy(r->buf[r->head].data, skb->data, len);
- }
+ do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
- rd_set_count(r, r->head, len);
- rd_set_addr_status(r, r->head, virt_to_bus(r->buf[r->head].data), status);
+ outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */
- /* new entry not yet activated! */
+ return 0;
+}
-#if 0
- printk(KERN_DEBUG "%s: dump entry %d: %u %02x %08x\n",
- __FUNCTION__, r->head,
- idev->ring_hw[r->head].rd_count,
- (unsigned)idev->ring_hw[r->head].rd_status,
- idev->ring_hw[r->head].rd_addr & 0xffffffff);
- vlsi_reg_debug(iobase,__FUNCTION__);
-#endif
+static int vlsi_stop_hw(vlsi_irda_dev_t *idev)
+{
+ struct pci_dev *pdev = idev->pdev;
+ struct net_device *ndev = pci_get_drvdata(pdev);
+ unsigned iobase = ndev->base_addr;
+ unsigned long flags;
+ spin_lock_irqsave(&idev->lock,flags);
+ outw(0, iobase+VLSI_PIO_IRENABLE);
+ outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */
+ wmb();
- /* let mtt delay pass before we need to acquire the spinlock! */
+ outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending + disable further IRQ */
+ mb();
+ spin_unlock_irqrestore(&idev->lock,flags);
- if ((mtt = irda_get_mtt(skb)) > 0) {
-
- ready.tv_usec = idev->last_rx.tv_usec + mtt;
- ready.tv_sec = idev->last_rx.tv_sec;
- if (ready.tv_usec >= 1000000) {
- ready.tv_usec -= 1000000;
- ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */
- }
- for(;;) {
- do_gettimeofday(&now);
- if (now.tv_sec > ready.tv_sec
- || (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec))
- break;
- udelay(100);
- }
- }
+ vlsi_unarm_tx(idev);
+ vlsi_unarm_rx(idev);
-/*
- * race window ahead, due to concurrent controller processing!
- *
- * We need to disable IR output in order to switch to TX mode.
- * Better not do this blindly anytime we want to transmit something
- * because TX may already run. However the controller may stop TX
- * at any time when fetching an inactive descriptor or one with
- * CLR_ENTX set. So we switch on TX only, if TX was not running
- * _after_ the new descriptor was activated on the ring. This ensures
- * we will either find TX already stopped or we can be sure, there
- * will be a TX-complete interrupt even if the chip stopped doing
- * TX just after we found it still running. The ISR will then find
- * the non-empty ring and restart TX processing. The enclosing
- * spinlock is required to get serialization with the ISR right.
- */
+ vlsi_clear_regs(iobase);
+ vlsi_stop_clock(pdev);
+ pci_disable_device(pdev);
- iobase = ndev->base_addr;
+ return 0;
+}
- spin_lock_irqsave(&idev->lock,flags);
+/**************************************************************/
- rd_activate(r, r->head);
- ring_put(r);
+static struct net_device_stats * vlsi_get_stats(struct net_device *ndev)
+{
+ vlsi_irda_dev_t *idev = ndev->priv;
- if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
-
- outw(0, iobase+VLSI_PIO_IRENABLE);
+ return &idev->stats;
+}
- config = inw(iobase+VLSI_PIO_IRCFG);
- rmb();
- outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
- wmb();
- outw(IRENABLE_IREN, iobase+VLSI_PIO_IRENABLE);
- mb();
- outw(0, iobase+VLSI_PIO_PROMPT);
- wmb();
- }
+static void vlsi_tx_timeout(struct net_device *ndev)
+{
+ vlsi_irda_dev_t *idev = ndev->priv;
+
+
+ vlsi_reg_debug(ndev->base_addr, __FUNCTION__);
+ vlsi_ring_debug(idev->tx_ring);
- if (r->head == r->tail) {
+ if (netif_running(ndev))
netif_stop_queue(ndev);
- printk(KERN_DEBUG "%s: tx ring full - queue stopped: %d/%d\n",
- __FUNCTION__, r->head, r->tail);
-#if 0
- printk(KERN_INFO "%s: dump stalled entry %d: %u %02x %08x\n",
- __FUNCTION__, r->tail,
- r->hw[r->tail].rd_count,
- (unsigned)r->hw[r->tail].rd_status,
- r->hw[r->tail].rd_addr & 0xffffffff);
-#endif
- vlsi_reg_debug(iobase,__FUNCTION__);
- }
- spin_unlock_irqrestore(&idev->lock, flags);
+ vlsi_stop_hw(idev);
- dev_kfree_skb(skb);
+ /* now simply restart the whole thing */
- return 0;
-}
+ if (!idev->new_baud)
+ idev->new_baud = idev->baud; /* keep current baudrate */
+ if (vlsi_start_hw(idev))
+ printk(KERN_CRIT "%s: failed to restart hw - %s(%s) unusable!\n",
+ __FUNCTION__, idev->pdev->name, ndev->name);
+ else
+ netif_start_queue(ndev);
+}
static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
{
@@ -1097,14 +1530,20 @@
u16 fifocnt;
int ret = 0;
- spin_lock_irqsave(&idev->lock,flags);
switch (cmd) {
case SIOCSBANDWIDTH:
if (!capable(CAP_NET_ADMIN)) {
ret = -EPERM;
break;
}
+ spin_lock_irqsave(&idev->lock, flags);
idev->new_baud = irq->ifr_baudrate;
+ /* when called from userland there might be a minor race window here
+ * if the stack tries to change speed concurrently - which would be
+ * pretty strange anyway with the userland having full control...
+ */
+ vlsi_set_baud_nolock(ndev);
+ spin_unlock_irqrestore(&idev->lock, flags);
break;
case SIOCSMEDIABUSY:
if (!capable(CAP_NET_ADMIN)) {
@@ -1116,7 +1555,7 @@
case SIOCGRECEIVING:
/* the best we can do: check whether there are any bytes in rx fifo.
* The trustable window (in case some data arrives just afterwards)
- * may be as short as 1usec or so at 4Mbps - no way for future-telling.
+ * may be as short as 1usec or so at 4Mbps.
*/
fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
irq->ifr_receiving = (fifocnt!=0) ? 1 : 0;
@@ -1126,42 +1565,159 @@
__FUNCTION__, cmd);
ret = -EOPNOTSUPP;
}
- spin_unlock_irqrestore(&idev->lock,flags);
return ret;
}
+/********************************************************/
+
+static void vlsi_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
+{
+ struct net_device *ndev = dev_instance;
+ vlsi_irda_dev_t *idev = ndev->priv;
+ unsigned iobase;
+ u8 irintr;
+ int boguscount = 32;
+ unsigned got_act;
+ unsigned long flags;
+
+ got_act = 0;
+ iobase = ndev->base_addr;
+ do {
+ spin_lock_irqsave(&idev->lock,flags);
+ irintr = inb(iobase+VLSI_PIO_IRINTR);
+ rmb();
+ outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */
+ spin_unlock_irqrestore(&idev->lock,flags);
+
+ if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */
+ break;
+
+ if (irintr&IRINTR_RPKTINT)
+ vlsi_rx_interrupt(ndev);
+
+ if (irintr&IRINTR_TPKTINT)
+ vlsi_tx_interrupt(ndev);
+
+ if (!(irintr & ~IRINTR_ACTIVITY))
+ break; /* done if only activity remaining */
+
+ if (irintr & ~(IRINTR_RPKTINT|IRINTR_TPKTINT|IRINTR_ACTIVITY)) {
+ printk(KERN_DEBUG "%s: IRINTR = %02x\n",
+ __FUNCTION__, (unsigned)irintr);
+ vlsi_reg_debug(iobase,__FUNCTION__);
+ }
+ } while (--boguscount > 0);
+
+ if (boguscount <= 0)
+ printk(KERN_WARNING "%s: too much work in interrupt!\n", __FUNCTION__);
+}
+
+/********************************************************/
-int vlsi_irda_init(struct net_device *ndev)
+static int vlsi_open(struct net_device *ndev)
+{
+ vlsi_irda_dev_t *idev = ndev->priv;
+ int err = -EAGAIN;
+ char hwname[32];
+
+ if (pci_request_regions(idev->pdev, drivername)) {
+ printk(KERN_ERR "%s: io resource busy\n", __FUNCTION__);
+ goto errout;
+ }
+ ndev->base_addr = pci_resource_start(idev->pdev,0);
+ ndev->irq = idev->pdev->irq;
+
+ /* under some rare occasions the chip apparently comes up with
+ * IRQ's pending. We better w/c pending IRQ and disable them all
+ */
+
+ outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR);
+
+ if (request_irq(ndev->irq, vlsi_interrupt, SA_SHIRQ,
+ drivername, ndev)) {
+ printk(KERN_ERR "%s: couldn't get IRQ: %d\n",
+ __FUNCTION__, ndev->irq);
+ goto errout_io;
+ }
+
+ if ((err = vlsi_create_hwif(idev)) != 0)
+ goto errout_irq;
+
+ sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr);
+ idev->irlap = irlap_open(ndev,&idev->qos,hwname);
+ if (!idev->irlap)
+ goto errout_free_ring;
+
+ do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
+
+ idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */
+
+ if ((err = vlsi_start_hw(idev)) != 0)
+ goto errout_close_irlap;
+
+ netif_start_queue(ndev);
+
+ printk(KERN_INFO "%s: device %s operational\n", __FUNCTION__, ndev->name);
+
+ return 0;
+
+errout_close_irlap:
+ irlap_close(idev->irlap);
+errout_free_ring:
+ vlsi_destroy_hwif(idev);
+errout_irq:
+ free_irq(ndev->irq,ndev);
+errout_io:
+ pci_release_regions(idev->pdev);
+errout:
+ return err;
+}
+
+static int vlsi_close(struct net_device *ndev)
{
vlsi_irda_dev_t *idev = ndev->priv;
- struct pci_dev *pdev = idev->pdev;
- u8 byte;
+ netif_stop_queue(ndev);
+
+ if (idev->irlap)
+ irlap_close(idev->irlap);
+ idev->irlap = NULL;
+
+ vlsi_stop_hw(idev);
+
+ vlsi_destroy_hwif(idev);
+
+ free_irq(ndev->irq,ndev);
+
+ pci_release_regions(idev->pdev);
+
+ printk(KERN_INFO "%s: device %s stopped\n", __FUNCTION__, ndev->name);
+
+ return 0;
+}
+
+static int vlsi_irda_init(struct net_device *ndev)
+{
+ vlsi_irda_dev_t *idev = ndev->priv;
+ struct pci_dev *pdev = idev->pdev;
SET_MODULE_OWNER(ndev);
ndev->irq = pdev->irq;
ndev->base_addr = pci_resource_start(pdev,0);
- /* PCI busmastering - see include file for details! */
+ /* PCI busmastering
+ * see include file for details why we need these 2 masks, in this order!
+ */
- if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW)) {
+ if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW)
+ || pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) {
printk(KERN_ERR "%s: aborting due to PCI BM-DMA address limitations\n",
__FUNCTION__);
return -1;
}
- pci_set_master(pdev);
- pdev->dma_mask = DMA_MASK_MSTRPAGE;
- pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE);
-
- /* we don't use the legacy UART, disable its address decoding */
-
- pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte);
- byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST);
- pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte);
-
irda_init_max_qos_capabilies(&idev->qos);
@@ -1187,6 +1743,8 @@
ndev->get_stats = vlsi_get_stats;
ndev->hard_start_xmit = vlsi_hard_start_xmit;
ndev->do_ioctl = vlsi_ioctl;
+ ndev->tx_timeout = vlsi_tx_timeout;
+ ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */
return 0;
}
@@ -1203,6 +1761,8 @@
if (pci_enable_device(pdev))
goto out;
+ else
+ pdev->current_state = 0; /* hw must be running now */
printk(KERN_INFO "%s: IrDA PCI controller %s detected\n",
drivername, pdev->name);
@@ -1228,6 +1788,8 @@
ndev->priv = (void *) idev;
spin_lock_init(&idev->lock);
+ init_MUTEX(&idev->sem);
+ down(&idev->sem);
idev->pdev = pdev;
ndev->init = vlsi_irda_init;
strcpy(ndev->name,"irda%d");
@@ -1236,13 +1798,36 @@
__FUNCTION__);
goto out_freedev;
}
+
+#ifdef CONFIG_PROC_FS
+ {
+ struct proc_dir_entry *ent;
+
+ ent = create_proc_entry(ndev->name, S_IFREG|S_IRUGO, vlsi_proc_root);
+ if (!ent) {
+ printk(KERN_ERR "%s: failed to create proc entry\n", __FUNCTION__);
+ goto out_unregister;
+ }
+ ent->data = ndev;
+ ent->proc_fops = &vlsi_proc_fops;
+ ent->size = 0;
+ idev->proc_entry = ent;
+ }
+#endif
+
printk(KERN_INFO "%s: registered device %s\n", drivername, ndev->name);
pci_set_drvdata(pdev, ndev);
+ up(&idev->sem);
return 0;
+out_unregister:
+ up(&idev->sem);
+ unregister_netdev(ndev);
+ goto out_disable;
out_freedev:
+ up(&idev->sem);
kfree(ndev);
out_disable:
pci_disable_device(pdev);
@@ -1254,51 +1839,166 @@
static void __devexit vlsi_irda_remove(struct pci_dev *pdev)
{
struct net_device *ndev = pci_get_drvdata(pdev);
+ vlsi_irda_dev_t *idev;
- if (ndev) {
- printk(KERN_INFO "%s: unregister device %s\n",
- drivername, ndev->name);
-
- unregister_netdev(ndev);
- /* do not free - async completed by unregister_netdev()
- * ndev->destructor called (if present) when going to free
- */
-
- }
- else
+ if (!ndev) {
printk(KERN_CRIT "%s: lost netdevice?\n", drivername);
- pci_set_drvdata(pdev, NULL);
+ return;
+ }
+ idev = ndev->priv;
+ down(&idev->sem);
+ pci_set_drvdata(pdev, NULL);
pci_disable_device(pdev);
- printk(KERN_INFO "%s: %s disabled\n", drivername, pdev->name);
+#ifdef CONFIG_PROC_FS
+ if (idev->proc_entry) {
+ remove_proc_entry(ndev->name, vlsi_proc_root);
+ idev->proc_entry = NULL;
+ }
+#endif
+ up(&idev->sem);
+
+ unregister_netdev(ndev);
+ /* do not free - async completed by unregister_netdev()
+ * ndev->destructor called (if present) when going to free
+ */
+
+ printk(KERN_INFO "%s: %s removed\n", drivername, pdev->name);
+}
+
+#ifdef CONFIG_PM
+
+/* The Controller doesn't provide PCI PM capabilities as defined by PCI specs.
+ * Some of the Linux PCI-PM code however depends on this, for example in
+ * pci_set_power_state(). So we have to take care to perform the required
+ * operations on our own (particularly reflecting the pdev->current_state)
+ * otherwise we might get cheated by pci-pm.
+ */
+
+static int vlsi_irda_save_state(struct pci_dev *pdev, u32 state)
+{
+ if (state < 1 || state > 3 ) {
+ printk( KERN_ERR "%s - %s: invalid pm state request: %u\n",
+ __FUNCTION__, pdev->name, state);
+ return -1;
+ }
+ return 0;
}
static int vlsi_irda_suspend(struct pci_dev *pdev, u32 state)
{
- printk(KERN_ERR "%s - %s\n", __FUNCTION__, pdev->name);
+ struct net_device *ndev = pci_get_drvdata(pdev);
+ vlsi_irda_dev_t *idev;
+
+ if (state < 1 || state > 3 ) {
+ printk( KERN_ERR "%s - %s: invalid pm state request: %u\n",
+ __FUNCTION__, pdev->name, state);
+ return 0;
+ }
+ if (!ndev) {
+ printk(KERN_ERR "%s - %s: no netdevice \n", __FUNCTION__, pdev->name);
+ return 0;
+ }
+ idev = ndev->priv;
+ down(&idev->sem);
+ if (pdev->current_state != 0) { /* already suspended */
+ if (state > pdev->current_state) { /* simply go deeper */
+ pci_set_power_state(pdev,state);
+ pdev->current_state = state;
+ }
+ else
+ printk(KERN_ERR "%s - %s: invalid suspend request %u -> %u\n",
+ __FUNCTION__, pdev->name, pdev->current_state, state);
+ up(&idev->sem);
+ return 0;
+ }
+
+ if (netif_running(ndev)) {
+ netif_device_detach(ndev);
+ vlsi_stop_hw(idev);
+ pci_save_state(pdev, idev->cfg_space);
+ if (!idev->new_baud)
+ /* remember speed settings to restore on resume */
+ idev->new_baud = idev->baud;
+ }
+
+ pci_set_power_state(pdev,state);
+ pdev->current_state = state;
+ idev->resume_ok = 1;
+ up(&idev->sem);
return 0;
}
static int vlsi_irda_resume(struct pci_dev *pdev)
{
- printk(KERN_ERR "%s - %s\n", __FUNCTION__, pdev->name);
+ struct net_device *ndev = pci_get_drvdata(pdev);
+ vlsi_irda_dev_t *idev;
+
+ if (!ndev) {
+ printk(KERN_ERR "%s - %s: no netdevice \n", __FUNCTION__, pdev->name);
+ return 0;
+ }
+ idev = ndev->priv;
+ down(&idev->sem);
+ if (pdev->current_state == 0) {
+ up(&idev->sem);
+ printk(KERN_ERR "%s - %s: already resumed\n", __FUNCTION__, pdev->name);
+ return 0;
+ }
+
+ pci_set_power_state(pdev, 0);
+ pdev->current_state = 0;
+
+ if (!idev->resume_ok) {
+ /* should be obsolete now - but used to happen due to:
+ * - pci layer initially setting pdev->current_state = 4 (unknown)
+ * - pci layer did not walk the save_state-tree (might be APM problem)
+ * so we could not refuse to suspend from undefined state
+ * - vlsi_irda_suspend detected invalid state and refused to save
+ * configuration for resume - but was too late to stop suspending
+ * - vlsi_irda_resume got screwed when trying to resume from garbage
+ *
+ * now we explicitly set pdev->current_state = 0 after enabling the
+ * device and independently resume_ok should catch any garbage config.
+ */
+ printk(KERN_ERR "%s - hm, nothing to resume?\n", __FUNCTION__);
+ up(&idev->sem);
+ return 0;
+ }
+
+ if (netif_running(ndev)) {
+ pci_restore_state(pdev, idev->cfg_space);
+ vlsi_start_hw(idev);
+ netif_device_attach(ndev);
+ }
+ idev->resume_ok = 0;
+ up(&idev->sem);
return 0;
}
+#endif /* CONFIG_PM */
+
/*********************************************************/
static struct pci_driver vlsi_irda_driver = {
- name: drivername,
- id_table: vlsi_irda_table,
- probe: vlsi_irda_probe,
- remove: __devexit_p(vlsi_irda_remove),
- suspend: vlsi_irda_suspend,
- resume: vlsi_irda_resume,
+ name: drivername,
+ id_table: vlsi_irda_table,
+ probe: vlsi_irda_probe,
+ remove: __devexit_p(vlsi_irda_remove),
+#ifdef CONFIG_PM
+ save_state: vlsi_irda_save_state,
+ suspend: vlsi_irda_suspend,
+ resume: vlsi_irda_resume,
+#endif
};
+#ifdef CONFIG_PROC_FS
+#define PROC_DIR ("driver/" DRIVER_NAME)
+#endif
+
static int __init vlsi_mod_init(void)
{
- int i;
+ int i, ret;
if (clksrc < 0 || clksrc > 3) {
printk(KERN_ERR "%s: invalid clksrc=%d\n", drivername, clksrc);
@@ -1324,14 +2024,27 @@
sirpulse = !!sirpulse;
- return pci_module_init(&vlsi_irda_driver);
+#ifdef CONFIG_PROC_FS
+ vlsi_proc_root = create_proc_entry(PROC_DIR, S_IFDIR, 0);
+ if (!vlsi_proc_root)
+ return -ENOMEM;
+#endif
+
+ ret = pci_module_init(&vlsi_irda_driver);
+
+#ifdef CONFIG_PROC_FS
+ if (ret)
+ remove_proc_entry(PROC_DIR, 0);
+#endif
+ return ret;
+
}
static void __exit vlsi_mod_exit(void)
{
pci_unregister_driver(&vlsi_irda_driver);
+ remove_proc_entry(PROC_DIR, 0);
}
module_init(vlsi_mod_init);
module_exit(vlsi_mod_exit);
-
--- linux-2.5.24/include/net/irda/vlsi_ir.h Fri Oct 12 22:04:25 2001
+++ v2.5.24-md-ob/include/net/irda/vlsi_ir.h Tue Jul 9 18:38:58 2002
@@ -3,9 +3,9 @@
*
* vlsi_ir.h: VLSI82C147 PCI IrDA controller driver for Linux
*
- * Version: 0.3, Sep 30, 2001
+ * Version: 0.4
*
- * Copyright (c) 2001 Martin Diehl
+ * Copyright (c) 2001-2002 Martin Diehl
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@@ -27,6 +27,26 @@
#ifndef IRDA_VLSI_FIR_H
#define IRDA_VLSI_FIR_H
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,4)
+#ifdef CONFIG_PROC_FS
+/* PDE() introduced in 2.5.4 */
+#define PDE(inode) ((inode)->u.generic_ip)
+#endif
+#endif
+
+/*
+ * #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,xx)
+ *
+ * missing pci-dma api call to give streaming dma buffer back to hw
+ * patch floating on lkml - probably present in 2.5.26 or later
+ * otherwise defining it as noop is ok, since the vlsi-ir is only
+ * used on two oldish x86-based notebooks which are cache-coherent
+ */
+#define pci_dma_prep_single(dev, addr, size, direction) /* nothing */
+/*
+ * #endif
+ */
+
/* ================================================================ */
/* non-standard PCI registers */
@@ -58,20 +78,20 @@
/* PLL control */
- CLKCTL_NO_PD = 0x04, /* PD# (inverted power down) signal,
- * i.e. PLL is powered, if NO_PD set */
+ CLKCTL_PD_INV = 0x04, /* PD#: inverted power down signal,
+ * i.e. PLL is powered, if PD_INV set */
CLKCTL_LOCK = 0x40, /* (ro) set, if PLL is locked */
/* clock source selection */
- CLKCTL_EXTCLK = 0x20, /* set to select external clock input */
- CLKCTL_XCKSEL = 0x10, /* set to indicate 40MHz EXTCLK, not 48MHz */
+ CLKCTL_EXTCLK = 0x20, /* set to select external clock input, not PLL */
+ CLKCTL_XCKSEL = 0x10, /* set to indicate EXTCLK is 40MHz, not 48MHz */
/* IrDA block control */
CLKCTL_CLKSTP = 0x80, /* set to disconnect from selected clock source */
CLKCTL_WAKE = 0x08 /* set to enable wakeup feature: whenever IR activity
- * is detected, NO_PD gets set and CLKSTP cleared */
+ * is detected, PD_INV gets set(?) and CLKSTP cleared */
};
/* ------------------------------------------ */
@@ -82,10 +102,9 @@
#define DMA_MASK_MSTRPAGE 0x00ffffff
#define MSTRPAGE_VALUE (DMA_MASK_MSTRPAGE >> 24)
-
/* PCI busmastering is somewhat special for this guy - in short:
*
- * We select to operate using MSTRPAGE=0 fixed, use ISA DMA
+ * We select to operate using fixed MSTRPAGE=0, use ISA DMA
* address restrictions to make the PCI BM api aware of this,
* but ensure the hardware is dealing with real 32bit access.
*
@@ -151,7 +170,6 @@
IRMISC_UARTSEL_2e8 = 0x03
};
-
/* ================================================================ */
/* registers mapped to 32 byte PCI IO space */
@@ -350,22 +368,17 @@
#define IRENABLE_MASK 0xff00 /* Read mask */
-
/* ------------------------------------------ */
/* VLSI_PIO_PHYCTL: IR Physical Layer Current Control Register (u16, ro) */
-
/* read-back of the currently applied physical layer status.
* applied from VLSI_PIO_NPHYCTL at rising edge of IRENABLE_IREN
* contents identical to VLSI_PIO_NPHYCTL (see below)
*/
-
-
/* ------------------------------------------ */
-
/* VLSI_PIO_NPHYCTL: IR Physical Layer Next Control Register (u16, rw) */
/* latched during IRENABLE_IREN=0 and applied at 0-1 transition
@@ -382,10 +395,10 @@
* fixed for all SIR speeds at 40MHz input clock (PLSWID=24 at 48MHz).
* IrPHY also allows shorter pulses down to the nominal pulse duration
* at 115.2kbaud (minus some tolerance) which is 1.41 usec.
- * Using the expression PLSWID = 12/(BAUD+1)-1 (multiplied by to for 48MHz)
+ * Using the expression PLSWID = 12/(BAUD+1)-1 (multiplied by two for 48MHz)
* we get the minimum acceptable PLSWID values according to the VLSI
* specification, which provides 1.5 usec pulse width for all speeds (except
- * for 2.4kbaud getting 6usec). This is well inside IrPHY v1.3 specs and
+ * for 2.4kbaud getting 6usec). This is fine with IrPHY v1.3 specs and
* reduces the transceiver power which drains the battery. At 9.6kbaud for
* example this amounts to more than 90% battery power saving!
*
@@ -399,7 +412,21 @@
* PREAMB = 15
*/
-#define BWP_TO_PHYCTL(B,W,P) ((((B)&0x3f)<<10) | (((W)&0x1f)<<5) | (((P)&0x1f)<<0))
+#define PHYCTL_BAUD_SHIFT 10
+#define PHYCTL_BAUD_MASK 0xfc00
+#define PHYCTL_PLSWID_SHIFT 5
+#define PHYCTL_PLSWID_MASK 0x03e0
+#define PHYCTL_PREAMB_SHIFT 0
+#define PHYCTL_PREAMB_MASK 0x001f
+
+#define PHYCTL_TO_BAUD(bwp) (((bwp)&PHYCTL_BAUD_MASK)>>PHYCTL_BAUD_SHIFT)
+#define PHYCTL_TO_PLSWID(bwp) (((bwp)&PHYCTL_PLSWID_MASK)>>PHYCTL_PLSWID_SHIFT)
+#define PHYCTL_TO_PREAMB(bwp) (((bwp)&PHYCTL_PREAMB_MASK)>>PHYCTL_PREAMB_SHIFT)
+
+#define BWP_TO_PHYCTL(b,w,p) ((((b)<<PHYCTL_BAUD_SHIFT)&PHYCTL_BAUD_MASK) \
+ | (((w)<<PHYCTL_PLSWID_SHIFT)&PHYCTL_PLSWID_MASK) \
+ | (((p)<<PHYCTL_PREAMB_SHIFT)&PHYCTL_PREAMB_MASK))
+
#define BAUD_BITS(br) ((115200/(br))-1)
static inline unsigned
@@ -417,7 +444,6 @@
return (tmp>0) ? (tmp-1) : 0;
}
-
#define PHYCTL_SIR(br,ws,cs) BWP_TO_PHYCTL(BAUD_BITS(br),calc_width_bits((br),(ws),(cs)),0)
#define PHYCTL_MIR(cs) BWP_TO_PHYCTL(0,((cs)?9:10),1)
#define PHYCTL_FIR BWP_TO_PHYCTL(0,0,15)
@@ -445,42 +471,61 @@
/* VLSI_PIO_MAXPKT: Maximum Packet Length register (u16, rw) */
-/* specifies the maximum legth (up to 4k - or (4k-1)? - bytes), which a
- * received frame may have - i.e. the size of the corresponding
- * receive buffers. For simplicity we use the same length for
- * receive and submit buffers and increase transfer buffer size
- * byond IrDA-MTU = 2048 so we have sufficient space left when
- * packet size increases during wrapping due to XBOFs and CE's.
- * Even for receiving unwrapped frames we need >MAX_PACKET_LEN
- * space since the controller appends FCS/CRC (2 or 4 bytes)
- * so we use 2*IrDA-MTU for both directions and cover even the
- * worst case, where all data bytes have to be escaped when wrapping.
- * well, this wastes some memory - anyway, later we will
- * either map skb's directly or use pci_pool allocator...
- */
-
-#define IRDA_MTU 2048 /* seems to be undefined elsewhere */
-
-#define XFER_BUF_SIZE (2*IRDA_MTU)
+/* maximum acceptable length for received packets */
-#define MAX_PACKET_LENGTH (XFER_BUF_SIZE-1) /* register uses only [11:0] */
+/* hw imposed limitation - register uses only [11:0] */
+#define MAX_PACKET_LENGTH 0x0fff
+/* IrLAP I-field (apparently not defined elsewhere) */
+#define IRDA_MTU 2048
-/* ------------------------------------------ */
+/* complete packet consists of A(1)+C(1)+I(<=IRDA_MTU) */
+#define IRLAP_SKB_ALLOCSIZE (1+1+IRDA_MTU)
+
+/* the buffers we use to exchange frames with the hardware need to be
+ * larger than IRLAP_SKB_ALLOCSIZE because we may have up to 4 bytes FCS
+ * appended and, in SIR mode, a lot of frame wrapping bytes. The worst
+ * case appears to be a SIR packet with I-size==IRDA_MTU and all bytes
+ * requiring to be escaped to provide transparency. Furthermore, the peer
+ * might ask for quite a number of additional XBOFs:
+ * up to 115+48 XBOFS 163
+ * regular BOF 1
+ * A-field 1
+ * C-field 1
+ * I-field, IRDA_MTU, all escaped 4096
+ * FCS (16 bit at SIR, escaped) 4
+ * EOF 1
+ * AFAICS nothing in IrLAP guarantees A/C field not to need escaping
+ * (f.e. 0xc0/0xc1 - i.e. BOF/EOF - are legal values there) so in the
+ * worst case we have 4269 bytes total frame size.
+ * However, the VLSI uses 12 bits only for all buffer length values,
+ * which limits the maximum useable buffer size <= 4095.
+ * Note this is not a limitation in the receive case because we use
+ * the SIR filtering mode where the hw unwraps the frame and only the
+ * bare packet+fcs is stored into the buffer - in contrast to the SIR
+ * tx case where we have to pass frame-wrapped packets to the hw.
+ * If this would ever become an issue in real life, the only workaround
+ * I see would be using the legacy UART emulation in SIR mode.
+ */
+#define XFER_BUF_SIZE MAX_PACKET_LENGTH
+
+/* ------------------------------------------ */
/* VLSI_PIO_RCVBCNT: Receive Byte Count Register (u16, ro) */
-/* recive packet counter gets incremented on every non-filtered
+/* receive packet counter gets incremented on every non-filtered
* byte which was put in the receive fifo and reset for each
* new packet. Used to decide whether we are just in the middle
* of receiving
*/
+/* better apply the [11:0] mask when reading, as some docs say the
+ * reserved [15:12] would return 1 when reading - which is wrong AFAICS
+ */
#define RCVBCNT_MASK 0x0fff
-/* ================================================================ */
-
+/******************************************************************/
/* descriptors for rx/tx ring
*
@@ -494,10 +539,10 @@
*
* Attention: Writing addr overwrites status!
*
- * ### FIXME: we depend on endianess here
+ * ### FIXME: depends on endianess (but there ain't no non-i586 ob800 ;-)
*/
-struct ring_descr {
+struct ring_descr_hw {
volatile u16 rd_count; /* tx/rx count [11:0] */
u16 reserved;
union {
@@ -505,60 +550,168 @@
struct {
u8 addr_res[3];
volatile u8 status; /* descriptor status */
- } rd_s;
- } rd_u;
-};
+ } rd_s __attribute__((packed));
+ } rd_u __attribute((packed));
+} __attribute__ ((packed));
#define rd_addr rd_u.addr
#define rd_status rd_u.rd_s.status
-
/* ring descriptor status bits */
-#define RD_STAT_ACTIVE 0x80 /* descriptor owned by hw (both TX,RX) */
+#define RD_ACTIVE 0x80 /* descriptor owned by hw (both TX,RX) */
/* TX ring descriptor status */
-#define TX_STAT_DISCRC 0x40 /* do not send CRC (for SIR) */
-#define TX_STAT_BADCRC 0x20 /* force a bad CRC */
-#define TX_STAT_PULSE 0x10 /* send indication pulse after this frame (MIR/FIR) */
-#define TX_STAT_FRCEUND 0x08 /* force underrun */
-#define TX_STAT_CLRENTX 0x04 /* clear ENTX after this frame */
-#define TX_STAT_UNDRN 0x01 /* TX fifo underrun (probably PCI problem) */
+#define RD_TX_DISCRC 0x40 /* do not send CRC (for SIR) */
+#define RD_TX_BADCRC 0x20 /* force a bad CRC */
+#define RD_TX_PULSE 0x10 /* send indication pulse after this frame (MIR/FIR) */
+#define RD_TX_FRCEUND 0x08 /* force underrun */
+#define RD_TX_CLRENTX 0x04 /* clear ENTX after this frame */
+#define RD_TX_UNDRN 0x01 /* TX fifo underrun (probably PCI problem) */
/* RX ring descriptor status */
-#define RX_STAT_PHYERR 0x40 /* physical encoding error */
-#define RX_STAT_CRCERR 0x20 /* CRC error (MIR/FIR) */
-#define RX_STAT_LENGTH 0x10 /* frame exceeds buffer length */
-#define RX_STAT_OVER 0x08 /* RX fifo overrun (probably PCI problem) */
-#define RX_STAT_SIRBAD 0x04 /* EOF missing: BOF follows BOF (SIR, filtered) */
-
+#define RD_RX_PHYERR 0x40 /* physical encoding error */
+#define RD_RX_CRCERR 0x20 /* CRC error (MIR/FIR) */
+#define RD_RX_LENGTH 0x10 /* frame exceeds buffer length */
+#define RD_RX_OVER 0x08 /* RX fifo overrun (probably PCI problem) */
+#define RD_RX_SIRBAD 0x04 /* EOF missing: BOF follows BOF (SIR, filtered) */
-#define RX_STAT_ERROR 0x7c /* any error in frame */
+#define RD_RX_ERROR 0x7c /* any error in received frame */
+/* the memory required to hold the 2 descriptor rings */
+#define HW_RING_AREA_SIZE (2 * MAX_RING_DESCR * sizeof(struct ring_descr_hw))
-/* ------------------------------------------ */
+/******************************************************************/
-/* contains the objects we've put into the ring descriptors
- * static buffers for now - probably skb's later
+/* sw-ring descriptors consists of a bus-mapped transfer buffer with
+ * associated skb and a pointer to the hw entry descriptor
*/
-struct ring_entry {
- struct sk_buff *skb;
- void *data;
+struct ring_descr {
+ struct ring_descr_hw *hw;
+ struct sk_buff *skb;
+ void *buf;
};
+/* wrappers for operations on hw-exposed ring descriptors
+ * access to the hw-part of the descriptors must use these.
+ */
+
+static inline int rd_is_active(struct ring_descr *rd)
+{
+ return ((rd->hw->rd_status & RD_ACTIVE) != 0);
+}
+
+static inline void rd_activate(struct ring_descr *rd)
+{
+ rd->hw->rd_status |= RD_ACTIVE;
+}
+
+static inline void rd_set_status(struct ring_descr *rd, u8 s)
+{
+ rd->hw->rd_status = s; /* may pass ownership to the hardware */
+}
+
+static inline void rd_set_addr_status(struct ring_descr *rd, dma_addr_t a, u8 s)
+{
+ /* order is important for two reasons:
+ * - overlayed: writing addr overwrites status
+ * - we want to write status last so we have valid address in
+ * case status has RD_ACTIVE set
+ */
+
+ if ((a & ~DMA_MASK_MSTRPAGE)>>24 != MSTRPAGE_VALUE) {
+ BUG();
+ return;
+ }
+
+ a &= DMA_MASK_MSTRPAGE; /* clear highbyte to make sure we won't write
+ * to status - just in case MSTRPAGE_VALUE!=0
+ */
+ rd->hw->rd_addr = a;
+ wmb();
+ rd_set_status(rd, s); /* may pass ownership to the hardware */
+}
+
+static inline void rd_set_count(struct ring_descr *rd, u16 c)
+{
+ rd->hw->rd_count = c;
+}
+
+static inline u8 rd_get_status(struct ring_descr *rd)
+{
+ return rd->hw->rd_status;
+}
+
+static inline dma_addr_t rd_get_addr(struct ring_descr *rd)
+{
+ dma_addr_t a;
+
+ a = (rd->hw->rd_addr & DMA_MASK_MSTRPAGE) | (MSTRPAGE_VALUE << 24);
+ return a;
+}
+
+static inline u16 rd_get_count(struct ring_descr *rd)
+{
+ return rd->hw->rd_count;
+}
+
+/******************************************************************/
+
+/* sw descriptor rings for rx, tx:
+ *
+ * operations follow producer-consumer paradigm, with the hw
+ * in the middle doing the processing.
+ * ring size must be power of two.
+ *
+ * producer advances r->tail after inserting for processing
+ * consumer advances r->head after removing processed rd
+ * ring is empty if head==tail / full if (tail+1)==head
+ */
struct vlsi_ring {
+ struct pci_dev *pdev;
+ int dir;
+ unsigned len;
unsigned size;
unsigned mask;
- unsigned head, tail;
- struct ring_descr *hw;
- struct ring_entry buf[MAX_RING_DESCR];
+ atomic_t head, tail;
+ struct ring_descr *rd;
};
-/* ------------------------------------------ */
+/* ring processing helpers */
+
+static inline struct ring_descr *ring_last(struct vlsi_ring *r)
+{
+ int t;
+
+ t = atomic_read(&r->tail) & r->mask;
+ return (((t+1) & r->mask) == (atomic_read(&r->head) & r->mask)) ? NULL : &r->rd[t];
+}
+
+static inline struct ring_descr *ring_put(struct vlsi_ring *r)
+{
+ atomic_inc(&r->tail);
+ return ring_last(r);
+}
+
+static inline struct ring_descr *ring_first(struct vlsi_ring *r)
+{
+ int h;
+
+ h = atomic_read(&r->head) & r->mask;
+ return (h == (atomic_read(&r->tail) & r->mask)) ? NULL : &r->rd[h];
+}
+
+static inline struct ring_descr *ring_get(struct vlsi_ring *r)
+{
+ atomic_inc(&r->head);
+ return ring_first(r);
+}
+
+/******************************************************************/
/* our private compound VLSI-PCI-IRDA device information */
@@ -575,13 +728,38 @@
dma_addr_t busaddr;
void *virtaddr;
- struct vlsi_ring tx_ring, rx_ring;
+ struct vlsi_ring *tx_ring, *rx_ring;
struct timeval last_rx;
spinlock_t lock;
-
+ struct semaphore sem;
+
+ u32 cfg_space[64/sizeof(u32)];
+ u8 resume_ok;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_entry;
+#endif
+
} vlsi_irda_dev_t;
+
+/********************************************************/
+
+/* the remapped error flags we use for returning from frame
+ * post-processing in vlsi_process_tx/rx() after it was completed
+ * by the hardware. These functions either return the >=0 number
+ * of transfered bytes in case of success or the negative (-)
+ * of the or'ed error flags.
+ */
+
+#define VLSI_TX_DROP 0x0001
+#define VLSI_TX_FIFO 0x0002
+
+#define VLSI_RX_DROP 0x0100
+#define VLSI_RX_OVER 0x0200
+#define VLSI_RX_LENGTH 0x0400
+#define VLSI_RX_FRAME 0x0800
+#define VLSI_RX_CRC 0x1000
/********************************************************/
-
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