zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/net/wan/sealevel.c b/ap/os/linux/linux-3.4.x/drivers/net/wan/sealevel.c
new file mode 100644
index 0000000..4f77484
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/net/wan/sealevel.c
@@ -0,0 +1,398 @@
+/*
+ * Sealevel Systems 4021 driver.
+ *
+ * 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.
+ *
+ * (c) Copyright 1999, 2001 Alan Cox
+ * (c) Copyright 2001 Red Hat Inc.
+ * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/delay.h>
+#include <linux/hdlc.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <net/arp.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h>
+#include "z85230.h"
+
+
+struct slvl_device
+{
+ struct z8530_channel *chan;
+ int channel;
+};
+
+
+struct slvl_board
+{
+ struct slvl_device dev[2];
+ struct z8530_dev board;
+ int iobase;
+};
+
+/*
+ * Network driver support routines
+ */
+
+static inline struct slvl_device* dev_to_chan(struct net_device *dev)
+{
+ return (struct slvl_device *)dev_to_hdlc(dev)->priv;
+}
+
+/*
+ * Frame receive. Simple for our card as we do HDLC and there
+ * is no funny garbage involved
+ */
+
+static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb)
+{
+ /* Drop the CRC - it's not a good idea to try and negotiate it ;) */
+ skb_trim(skb, skb->len - 2);
+ skb->protocol = hdlc_type_trans(skb, c->netdevice);
+ skb_reset_mac_header(skb);
+ skb->dev = c->netdevice;
+ netif_rx(skb);
+}
+
+/*
+ * We've been placed in the UP state
+ */
+
+static int sealevel_open(struct net_device *d)
+{
+ struct slvl_device *slvl = dev_to_chan(d);
+ int err = -1;
+ int unit = slvl->channel;
+
+ /*
+ * Link layer up.
+ */
+
+ switch (unit) {
+ case 0:
+ err = z8530_sync_dma_open(d, slvl->chan);
+ break;
+ case 1:
+ err = z8530_sync_open(d, slvl->chan);
+ break;
+ }
+
+ if (err)
+ return err;
+
+ err = hdlc_open(d);
+ if (err) {
+ switch (unit) {
+ case 0:
+ z8530_sync_dma_close(d, slvl->chan);
+ break;
+ case 1:
+ z8530_sync_close(d, slvl->chan);
+ break;
+ }
+ return err;
+ }
+
+ slvl->chan->rx_function = sealevel_input;
+
+ /*
+ * Go go go
+ */
+ netif_start_queue(d);
+ return 0;
+}
+
+static int sealevel_close(struct net_device *d)
+{
+ struct slvl_device *slvl = dev_to_chan(d);
+ int unit = slvl->channel;
+
+ /*
+ * Discard new frames
+ */
+
+ slvl->chan->rx_function = z8530_null_rx;
+
+ hdlc_close(d);
+ netif_stop_queue(d);
+
+ switch (unit) {
+ case 0:
+ z8530_sync_dma_close(d, slvl->chan);
+ break;
+ case 1:
+ z8530_sync_close(d, slvl->chan);
+ break;
+ }
+ return 0;
+}
+
+static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
+{
+ /* struct slvl_device *slvl=dev_to_chan(d);
+ z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */
+ return hdlc_ioctl(d, ifr, cmd);
+}
+
+/*
+ * Passed network frames, fire them downwind.
+ */
+
+static netdev_tx_t sealevel_queue_xmit(struct sk_buff *skb,
+ struct net_device *d)
+{
+ return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
+}
+
+static int sealevel_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
+ return 0;
+ return -EINVAL;
+}
+
+static const struct net_device_ops sealevel_ops = {
+ .ndo_open = sealevel_open,
+ .ndo_stop = sealevel_close,
+ .ndo_change_mtu = hdlc_change_mtu,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_do_ioctl = sealevel_ioctl,
+};
+
+static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
+{
+ struct net_device *dev = alloc_hdlcdev(sv);
+ if (!dev)
+ return -1;
+
+ dev_to_hdlc(dev)->attach = sealevel_attach;
+ dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
+ dev->netdev_ops = &sealevel_ops;
+ dev->base_addr = iobase;
+ dev->irq = irq;
+
+ if (register_hdlc_device(dev)) {
+ pr_err("unable to register HDLC device\n");
+ free_netdev(dev);
+ return -1;
+ }
+
+ sv->chan->netdevice = dev;
+ return 0;
+}
+
+
+/*
+ * Allocate and setup Sealevel board.
+ */
+
+static __init struct slvl_board *slvl_init(int iobase, int irq,
+ int txdma, int rxdma, int slow)
+{
+ struct z8530_dev *dev;
+ struct slvl_board *b;
+
+ /*
+ * Get the needed I/O space
+ */
+
+ if (!request_region(iobase, 8, "Sealevel 4021")) {
+ pr_warn("I/O 0x%X already in use\n", iobase);
+ return NULL;
+ }
+
+ b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
+ if (!b)
+ goto err_kzalloc;
+
+ b->dev[0].chan = &b->board.chanA;
+ b->dev[0].channel = 0;
+
+ b->dev[1].chan = &b->board.chanB;
+ b->dev[1].channel = 1;
+
+ dev = &b->board;
+
+ /*
+ * Stuff in the I/O addressing
+ */
+
+ dev->active = 0;
+
+ b->iobase = iobase;
+
+ /*
+ * Select 8530 delays for the old board
+ */
+
+ if (slow)
+ iobase |= Z8530_PORT_SLEEP;
+
+ dev->chanA.ctrlio = iobase + 1;
+ dev->chanA.dataio = iobase;
+ dev->chanB.ctrlio = iobase + 3;
+ dev->chanB.dataio = iobase + 2;
+
+ dev->chanA.irqs = &z8530_nop;
+ dev->chanB.irqs = &z8530_nop;
+
+ /*
+ * Assert DTR enable DMA
+ */
+
+ outb(3 | (1 << 7), b->iobase + 4);
+
+
+ /* We want a fast IRQ for this device. Actually we'd like an even faster
+ IRQ ;) - This is one driver RtLinux is made for */
+
+ if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
+ "SeaLevel", dev) < 0) {
+ pr_warn("IRQ %d already in use\n", irq);
+ goto err_request_irq;
+ }
+
+ dev->irq = irq;
+ dev->chanA.private = &b->dev[0];
+ dev->chanB.private = &b->dev[1];
+ dev->chanA.dev = dev;
+ dev->chanB.dev = dev;
+
+ dev->chanA.txdma = 3;
+ dev->chanA.rxdma = 1;
+ if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
+ goto err_dma_tx;
+
+ if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
+ goto err_dma_rx;
+
+ disable_irq(irq);
+
+ /*
+ * Begin normal initialise
+ */
+
+ if (z8530_init(dev) != 0) {
+ pr_err("Z8530 series device not found\n");
+ enable_irq(irq);
+ goto free_hw;
+ }
+ if (dev->type == Z85C30) {
+ z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
+ z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
+ } else {
+ z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
+ z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
+ }
+
+ /*
+ * Now we can take the IRQ
+ */
+
+ enable_irq(irq);
+
+ if (slvl_setup(&b->dev[0], iobase, irq))
+ goto free_hw;
+ if (slvl_setup(&b->dev[1], iobase, irq))
+ goto free_netdev0;
+
+ z8530_describe(dev, "I/O", iobase);
+ dev->active = 1;
+ return b;
+
+free_netdev0:
+ unregister_hdlc_device(b->dev[0].chan->netdevice);
+ free_netdev(b->dev[0].chan->netdevice);
+free_hw:
+ free_dma(dev->chanA.rxdma);
+err_dma_rx:
+ free_dma(dev->chanA.txdma);
+err_dma_tx:
+ free_irq(irq, dev);
+err_request_irq:
+ kfree(b);
+err_kzalloc:
+ release_region(iobase, 8);
+ return NULL;
+}
+
+static void __exit slvl_shutdown(struct slvl_board *b)
+{
+ int u;
+
+ z8530_shutdown(&b->board);
+
+ for (u = 0; u < 2; u++) {
+ struct net_device *d = b->dev[u].chan->netdevice;
+ unregister_hdlc_device(d);
+ free_netdev(d);
+ }
+
+ free_irq(b->board.irq, &b->board);
+ free_dma(b->board.chanA.rxdma);
+ free_dma(b->board.chanA.txdma);
+ /* DMA off on the card, drop DTR */
+ outb(0, b->iobase);
+ release_region(b->iobase, 8);
+ kfree(b);
+}
+
+
+static int io=0x238;
+static int txdma=1;
+static int rxdma=3;
+static int irq=5;
+static bool slow=false;
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
+module_param(txdma, int, 0);
+MODULE_PARM_DESC(txdma, "Transmit DMA channel");
+module_param(rxdma, int, 0);
+MODULE_PARM_DESC(rxdma, "Receive DMA channel");
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
+module_param(slow, bool, 0);
+MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
+
+static struct slvl_board *slvl_unit;
+
+static int __init slvl_init_module(void)
+{
+ slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);
+
+ return slvl_unit ? 0 : -ENODEV;
+}
+
+static void __exit slvl_cleanup_module(void)
+{
+ if (slvl_unit)
+ slvl_shutdown(slvl_unit);
+}
+
+module_init(slvl_init_module);
+module_exit(slvl_cleanup_module);