diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-27 17:03:32 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-08-28 16:42:57 -0700 |
commit | 6c391ff758eb9f41e11c6143fd5bdb3b3324bf9f (patch) | |
tree | 95ee8f47eacb698ecb3de600e73f07bde3f0d404 /drivers/net/irda/vlsi_ir.c | |
parent | 1ca163afb6fd569b6efdc221954177cba5a02cbc (diff) |
irda: move drivers/net/irda to drivers/staging/irda/drivers
Move the irda drivers from drivers/net/irda/ to
drivers/staging/irda/drivers as they will be deleted in a future kernel
release.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/irda/vlsi_ir.c')
-rw-r--r-- | drivers/net/irda/vlsi_ir.c | 1872 |
1 files changed, 0 insertions, 1872 deletions
diff --git a/drivers/net/irda/vlsi_ir.c b/drivers/net/irda/vlsi_ir.c deleted file mode 100644 index 6638784c082e..000000000000 --- a/drivers/net/irda/vlsi_ir.c +++ /dev/null @@ -1,1872 +0,0 @@ -/********************************************************************* - * - * vlsi_ir.c: VLSI82C147 PCI IrDA controller driver for Linux - * - * Copyright (c) 2001-2003 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 - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see <http://www.gnu.org/licenses/>. - * - ********************************************************************/ - -#include <linux/module.h> - -#define DRIVER_NAME "vlsi_ir" -#define DRIVER_VERSION "v0.5" -#define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147" -#define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>" - -MODULE_DESCRIPTION(DRIVER_DESCRIPTION); -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_LICENSE("GPL"); - -/********************************************************/ - -#include <linux/kernel.h> -#include <linux/ktime.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/pci.h> -#include <linux/slab.h> -#include <linux/netdevice.h> -#include <linux/skbuff.h> -#include <linux/delay.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/math64.h> -#include <linux/mutex.h> -#include <linux/uaccess.h> -#include <asm/byteorder.h> - -#include <net/irda/irda.h> -#include <net/irda/irda_device.h> -#include <net/irda/wrapper.h> -#include <net/irda/crc.h> - -#include "vlsi_ir.h" - -/********************************************************/ - -static /* const */ char drivername[] = DRIVER_NAME; - -static const struct pci_device_id vlsi_irda_table[] = { - { - .class = PCI_CLASS_WIRELESS_IRDA << 8, - .class_mask = PCI_CLASS_SUBCLASS_MASK << 8, - .vendor = PCI_VENDOR_ID_VLSI, - .device = PCI_DEVICE_ID_VLSI_82C147, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - }, - { /* all zeroes */ } -}; - -MODULE_DEVICE_TABLE(pci, vlsi_irda_table); - -/********************************************************/ - -/* clksrc: which clock source to be used - * 0: auto - try PLL, fallback to 40MHz XCLK - * 1: on-chip 48MHz PLL - * 2: external 48MHz XCLK - * 3: external 40MHz XCLK (HP OB-800) - */ - -static int clksrc = 0; /* default is 0(auto) */ -module_param(clksrc, int, 0); -MODULE_PARM_DESC(clksrc, "clock input source selection"); - -/* ringsize: size of the tx and rx descriptor rings - * independent for tx and rx - * specify as ringsize=tx[,rx] - * allowed values: 4, 8, 16, 32, 64 - * Due to the IrDA 1.x max. allowed window size=7, - * there should be no gain when using rings larger than 8 - */ - -static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */ -module_param_array(ringsize, int, NULL, 0); -MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size"); - -/* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits - * 0: very short, 1.5us (exception: 6us at 2.4 kbaud) - * 1: nominal 3/16 bittime width - * note: IrDA compliant peer devices should be happy regardless - * which one is used. Primary goal is to save some power - * on the sender's side - at 9.6kbaud for example the short - * pulse width saves more than 90% of the transmitted IR power. - */ - -static int sirpulse = 1; /* default is 3/16 bittime */ -module_param(sirpulse, int, 0); -MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning"); - -/* 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) - * Don't know which transceiver is used by my OB800 - the - * pretty common HP HDLS-1100 requires 1 msec - so lets use this. - */ - -static int qos_mtt_bits = 0x07; /* default is 1 ms or more */ -module_param(qos_mtt_bits, int, 0); -MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time"); - -/********************************************************/ - -static void vlsi_reg_debug(unsigned iobase, const char *s) -{ - int i; - - printk(KERN_DEBUG "%s: ", s); - for (i = 0; i < 0x20; i++) - printk("%02x", (unsigned)inb((iobase+i))); - printk("\n"); -} - -static void vlsi_ring_debug(struct vlsi_ring *r) -{ - struct ring_descr *rd; - unsigned i; - - printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n", - __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); - printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__, - 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: ", __func__, 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", - __func__, (unsigned) rd_get_status(rd), - (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); - } -} - -/********************************************************/ - -/* needed regardless of CONFIG_PROC_FS */ -static struct proc_dir_entry *vlsi_proc_root = NULL; - -#ifdef CONFIG_PROC_FS - -static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev) -{ - unsigned iobase = pci_resource_start(pdev, 0); - unsigned i; - - seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n", - pci_name(pdev), (int)pdev->vendor, (int)pdev->device); - seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state); - seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n", - pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask); - seq_printf(seq, "hw registers: "); - for (i = 0; i < 0x20; i++) - seq_printf(seq, "%02x", (unsigned)inb((iobase+i))); - seq_printf(seq, "\n"); -} - -static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) -{ - vlsi_irda_dev_t *idev = netdev_priv(ndev); - u8 byte; - u16 word; - s32 sec, usec; - unsigned iobase = ndev->base_addr; - - seq_printf(seq, "\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; - - seq_printf(seq, "\nhw-state:\n"); - pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte); - seq_printf(seq, "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) { - seq_printf(seq, "0x%s\n", - (byte&2) ? ((byte&1) ? "3e8" : "2e8") - : ((byte&1) ? "3f8" : "2f8")); - } - pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte); - seq_printf(seq, "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); - seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte); - - byte = inb(iobase+VLSI_PIO_IRINTR); - seq_printf(seq, "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); - seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word)); - word = inw(iobase+VLSI_PIO_RINGBASE); - seq_printf(seq, "RINGBASE: busmap=0x%08x\n", - ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24)); - word = inw(iobase+VLSI_PIO_RINGSIZE); - seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word), - RINGSIZE_TO_TXSIZE(word)); - - word = inw(iobase+VLSI_PIO_IRCFG); - seq_printf(seq, "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); - seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n", - (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "", - (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); - seq_printf(seq, "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); - seq_printf(seq, "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); - seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word); - word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; - seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word); - - seq_printf(seq, "\nsw-state:\n"); - seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud, - (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR")); - sec = div_s64_rem(ktime_us_delta(ktime_get(), idev->last_rx), - USEC_PER_SEC, &usec); - seq_printf(seq, "last rx: %ul.%06u sec\n", sec, usec); - - seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu", - ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors, - ndev->stats.rx_dropped); - seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", - ndev->stats.rx_over_errors, ndev->stats.rx_length_errors, - ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors); - seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", - ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors, - ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors); - -} - -static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r) -{ - struct ring_descr *rd; - unsigned i, j; - int h, t; - - seq_printf(seq, "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; - seq_printf(seq, "head = %d / tail = %d ", h, t); - if (h == t) - seq_printf(seq, "(empty)\n"); - else { - if (((t+1)&r->mask) == h) - seq_printf(seq, "(full)\n"); - else - seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask)); - rd = &r->rd[h]; - j = (unsigned) rd_get_count(rd); - seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n", - h, (unsigned)rd_get_status(rd), j); - if (j > 0) { - seq_printf(seq, " data: %*ph\n", - min_t(unsigned, j, 20), rd->buf); - } - } - for (i = 0; i < r->size; i++) { - rd = &r->rd[i]; - seq_printf(seq, "> ring descr %u: ", i); - seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); - seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n", - (unsigned) rd_get_status(rd), - (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); - } -} - -static int vlsi_seq_show(struct seq_file *seq, void *v) -{ - struct net_device *ndev = seq->private; - vlsi_irda_dev_t *idev = netdev_priv(ndev); - unsigned long flags; - - seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION); - seq_printf(seq, "clksrc: %s\n", - (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK") - : ((clksrc==1)?"48MHz PLL":"autodetect")); - seq_printf(seq, "ringsize: tx=%d / rx=%d\n", - ringsize[0], ringsize[1]); - seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short"); - seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits); - - spin_lock_irqsave(&idev->lock, flags); - if (idev->pdev != NULL) { - vlsi_proc_pdev(seq, idev->pdev); - - if (idev->pdev->current_state == 0) - vlsi_proc_ndev(seq, ndev); - else - seq_printf(seq, "\nPCI controller down - resume_ok = %d\n", - idev->resume_ok); - if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) { - seq_printf(seq, "\n--------- RX ring -----------\n\n"); - vlsi_proc_ring(seq, idev->rx_ring); - seq_printf(seq, "\n--------- TX ring -----------\n\n"); - vlsi_proc_ring(seq, idev->tx_ring); - } - } - seq_printf(seq, "\n"); - spin_unlock_irqrestore(&idev->lock, flags); - - return 0; -} - -static int vlsi_seq_open(struct inode *inode, struct file *file) -{ - return single_open(file, vlsi_seq_show, PDE_DATA(inode)); -} - -static const struct file_operations vlsi_proc_fops = { - .owner = THIS_MODULE, - .open = vlsi_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -#define VLSI_PROC_FOPS (&vlsi_proc_fops) - -#else /* CONFIG_PROC_FS */ -#define VLSI_PROC_FOPS NULL -#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; - - 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) - busaddr = pci_map_single(pdev, rd->buf, len, dir); - if (rd->buf == NULL || pci_dma_mapping_error(pdev, busaddr)) { - if (rd->buf) { - net_err_ratelimited("%s: failed to create PCI-MAP for %p\n", - __func__, rd->buf); - kfree(rd->buf); - rd->buf = NULL; - } - for (j = 0; j < i; j++) { - rd = r->rd + j; - busaddr = rd_get_addr(rd); - rd_set_addr_status(rd, 0, 0); - pci_unmap_single(pdev, busaddr, len, dir); - kfree(rd->buf); - rd->buf = NULL; - } - kfree(r); - return NULL; - } - rd_set_addr_status(rd, busaddr, 0); - /* initially, the dma buffer is owned by the CPU */ - rd->skb = NULL; - } - return 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++) { - 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); - kfree(rd->buf); - } - kfree(r); - return 0; -} - -static int vlsi_create_hwif(vlsi_irda_dev_t *idev) -{ - char *ringarea; - struct ring_descr_hw *hwmap; - - idev->virtaddr = NULL; - idev->busaddr = 0; - - ringarea = pci_zalloc_consistent(idev->pdev, HW_RING_AREA_SIZE, - &idev->busaddr); - if (!ringarea) - goto out; - - 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->virtaddr = ringarea; - return 0; - -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_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 = pci_get_drvdata(r->pdev); - vlsi_irda_dev_t *idev = netdev_priv(ndev); - - pci_dma_sync_single_for_cpu(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; - goto done; - } - - len = rd_get_count(rd); - crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); - len -= crclen; /* remove trailing CRC */ - if (len <= 0) { - pr_debug("%s: strange frame (len=%d)\n", __func__, len); - ret |= VLSI_RX_DROP; - goto done; - } - - if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ - - /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the - * endian-adjustment there just in place will dirty a cache line - * which belongs to the map and thus we must be sure it will - * get flushed before giving the buffer back to hardware. - * vlsi_fill_rx() will do this anyway - but here we rely on. - */ - le16_to_cpus(rd->buf+len); - if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { - pr_debug("%s: crc error\n", __func__); - ret |= VLSI_RX_CRC; - goto done; - } - } - - if (!rd->skb) { - net_warn_ratelimited("%s: rx packet lost\n", __func__); - ret |= VLSI_RX_DROP; - goto done; - } - - skb = rd->skb; - rd->skb = NULL; - skb->dev = ndev; - skb_put_data(skb, rd->buf, len); - skb_reset_mac_header(skb); - if (in_interrupt()) - netif_rx(skb); - else - netif_rx_ni(skb); - -done: - rd_set_status(rd, 0); - rd_set_count(rd, 0); - /* buffer still owned by CPU */ - - return (ret) ? -ret : len; -} - -static void vlsi_fill_rx(struct vlsi_ring *r) -{ - struct ring_descr *rd; - - for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { - if (rd_is_active(rd)) { - net_warn_ratelimited("%s: driver bug: rx descr race with hw\n", - __func__); - vlsi_ring_debug(r); - 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_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); - rd_activate(rd); - } -} - -static void vlsi_rx_interrupt(struct net_device *ndev) -{ - vlsi_irda_dev_t *idev = netdev_priv(ndev); - 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; - ndev->stats.rx_errors++; - if (ret & VLSI_RX_DROP) - ndev->stats.rx_dropped++; - if (ret & VLSI_RX_OVER) - ndev->stats.rx_over_errors++; - if (ret & VLSI_RX_LENGTH) - ndev->stats.rx_length_errors++; - if (ret & VLSI_RX_FRAME) - ndev->stats.rx_frame_errors++; - if (ret & VLSI_RX_CRC) - ndev->stats.rx_crc_errors++; - } - else if (ret > 0) { - ndev->stats.rx_packets++; - ndev->stats.rx_bytes += ret; - } - } - - idev->last_rx = ktime_get(); /* 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 */ - net_err_ratelimited("%s: rx ring exhausted!\n", __func__); - 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 net_device *ndev = pci_get_drvdata(idev->pdev); - 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)) { - pr_debug("%s - dropping rx packet\n", __func__); - ret = -VLSI_RX_DROP; - } - rd_set_count(rd, 0); - pci_dma_sync_single_for_cpu(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; - ndev->stats.rx_errors++; - if (ret & VLSI_RX_DROP) - ndev->stats.rx_dropped++; - if (ret & VLSI_RX_OVER) - ndev->stats.rx_over_errors++; - if (ret & VLSI_RX_LENGTH) - ndev->stats.rx_length_errors++; - if (ret & VLSI_RX_FRAME) - ndev->stats.rx_frame_errors++; - if (ret & VLSI_RX_CRC) - ndev->stats.rx_crc_errors++; - } - else if (ret > 0) { - ndev->stats.rx_packets++; - ndev->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_for_cpu(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(vlsi_irda_dev_t *idev, unsigned iobase) -{ - u16 nphyctl; - u16 config; - unsigned mode; - int ret; - int baudrate; - int fifocnt; - - baudrate = idev->new_baud; - pr_debug("%s: %d -> %d\n", __func__, idev->baud, idev->new_baud); - 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; - switch(baudrate) { - default: - net_warn_ratelimited("%s: undefined baudrate %d - fallback to 9600!\n", - __func__, baudrate); - baudrate = 9600; - /* fallthru */ - case 2400: - case 9600: - case 19200: - case 38400: - case 57600: - case 115200: - nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); - break; - } - } - config |= IRCFG_MSTR | IRCFG_ENRX; - - fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; - if (fifocnt != 0) { - pr_debug("%s: rx fifo not empty(%d)\n", __func__, fifocnt); - } - - outw(0, iobase+VLSI_PIO_IRENABLE); - outw(config, iobase+VLSI_PIO_IRCFG); - outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); - wmb(); - outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); - mb(); - - udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ - - /* read back settings for validation */ - - config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; - - if (mode == IFF_FIR) - config ^= IRENABLE_FIR_ON; - else if (mode == IFF_MIR) - config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); - else - config ^= IRENABLE_SIR_ON; - - if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { - net_warn_ratelimited("%s: failed to set %s mode!\n", - __func__, - mode == IFF_SIR ? "SIR" : - mode == IFF_MIR ? "MIR" : "FIR"); - ret = -1; - } - else { - if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { - net_warn_ratelimited("%s: failed to apply baudrate %d\n", - __func__, baudrate); - ret = -1; - } - else { - idev->mode = mode; - idev->baud = baudrate; - idev->new_baud = 0; - ret = 0; - } - } - - if (ret) - vlsi_reg_debug(iobase,__func__); - - return ret; -} - -static netdev_tx_t vlsi_hard_start_xmit(struct sk_buff *skb, - struct net_device *ndev) -{ - vlsi_irda_dev_t *idev = netdev_priv(ndev); - 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, diff; - int len, speed; - char *msg = NULL; - - speed = irda_get_next_speed(skb); - spin_lock_irqsave(&idev->lock, flags); - if (speed != -1 && speed != idev->baud) { - netif_stop_queue(ndev); - idev->new_baud = speed; - status = RD_TX_CLRENTX; /* stop tx-ring after this frame */ - } - else - status = 0; - - if (skb->len == 0) { - /* handle zero packets - should be speed change */ - if (status == 0) { - msg = "bogus zero-length packet"; - goto drop_unlock; - } - - /* 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. - */ - - if (ring_first(idev->tx_ring) == NULL) { - /* no race - tx-ring already empty */ - vlsi_set_baud(idev, iobase); - 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); - dev_kfree_skb_any(skb); - return NETDEV_TX_OK; - } - - /* sanity checks - simply drop the packet */ - - rd = ring_last(r); - if (!rd) { - msg = "ring full, but queue wasn't stopped"; - goto drop_unlock; - } - - if (rd_is_active(rd)) { - msg = "entry still owned by hw"; - goto drop_unlock; - } - - if (!rd->buf) { - msg = "tx ring entry without pci buffer"; - goto drop_unlock; - } - - if (rd->skb) { - msg = "ring entry with old skb still attached"; - goto drop_unlock; - } - - /* no need for serialization or interrupt disable during mtt */ - spin_unlock_irqrestore(&idev->lock, flags); - - if ((mtt = irda_get_mtt(skb)) > 0) { - diff = ktime_us_delta(ktime_get(), idev->last_rx); - if (mtt > diff) - udelay(mtt - diff); - /* must not sleep here - called under netif_tx_lock! */ - } - - /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu() - * after subsequent tx-completion - */ - - if (idev->mode == IFF_SIR) { - status |= RD_TX_DISCRC; /* no hw-crc creation */ - len = async_wrap_skb(skb, rd->buf, r->len); - - /* 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. - */ - - if (len >= r->len-5) - net_warn_ratelimited("%s: possible buffer overflow with SIR wrapping!\n", - __func__); - } - 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) { - msg = "frame exceeds tx buffer length"; - goto drop; - } - else - skb_copy_from_linear_data(skb, rd->buf, len); - } - - 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_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); - -/* Switching to TX mode here races 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); - - rd_activate(rd); - - if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { - int fifocnt; - - fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; - if (fifocnt != 0) { - pr_debug("%s: rx fifo not empty(%d)\n", - __func__, fifocnt); - } - - config = inw(iobase+VLSI_PIO_IRCFG); - mb(); - outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); - wmb(); - outw(0, iobase+VLSI_PIO_PROMPT); - } - - if (ring_put(r) == NULL) { - netif_stop_queue(ndev); - pr_debug("%s: tx ring full - queue stopped\n", __func__); - } - spin_unlock_irqrestore(&idev->lock, flags); - - return NETDEV_TX_OK; - -drop_unlock: - spin_unlock_irqrestore(&idev->lock, flags); -drop: - net_warn_ratelimited("%s: dropping packet - %s\n", __func__, msg); - dev_kfree_skb_any(skb); - ndev->stats.tx_errors++; - ndev->stats.tx_dropped++; - /* Don't even think about returning NET_XMIT_DROP (=1) here! - * In fact any retval!=0 causes the packet scheduler to requeue the - * packet for later retry of transmission - which isn't exactly - * what we want after we've just called dev_kfree_skb_any ;-) - */ - return NETDEV_TX_OK; -} - -static void vlsi_tx_interrupt(struct net_device *ndev) -{ - vlsi_irda_dev_t *idev = netdev_priv(ndev); - struct vlsi_ring *r = idev->tx_ring; - struct ring_descr *rd; - unsigned iobase; - int ret; - u16 config; - - for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { - - if (rd_is_active(rd)) - break; - - ret = vlsi_process_tx(r, rd); - - if (ret < 0) { - ret = -ret; - ndev->stats.tx_errors++; - if (ret & VLSI_TX_DROP) - ndev->stats.tx_dropped++; - if (ret & VLSI_TX_FIFO) - ndev->stats.tx_fifo_errors++; - } - else if (ret > 0){ - ndev->stats.tx_packets++; - ndev->stats.tx_bytes += ret; - } - } - - iobase = ndev->base_addr; - - if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ - vlsi_set_baud(idev, iobase); - - config = inw(iobase+VLSI_PIO_IRCFG); - if (rd == NULL) /* tx ring empty: re-enable rx */ - outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); - - else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { - int fifocnt; - - fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; - if (fifocnt != 0) { - pr_debug("%s: rx fifo not empty(%d)\n", - __func__, fifocnt); - } - outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); - } - - outw(0, iobase+VLSI_PIO_PROMPT); - - if (netif_queue_stopped(ndev) && !idev->new_baud) { - netif_wake_queue(ndev); - pr_debug("%s: queue awoken\n", __func__); |