Root/drivers/net/netx-eth.c

1/*
2 * drivers/net/netx-eth.c
3 *
4 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/delay.h>
24
25#include <linux/netdevice.h>
26#include <linux/platform_device.h>
27#include <linux/etherdevice.h>
28#include <linux/skbuff.h>
29#include <linux/mii.h>
30
31#include <asm/io.h>
32#include <mach/hardware.h>
33#include <mach/netx-regs.h>
34#include <mach/pfifo.h>
35#include <mach/xc.h>
36#include <mach/eth.h>
37
38/* XC Fifo Offsets */
39#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */
40#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */
41                            /* Data packages are indicated by XC */
42#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */
43                            /* Data packages are indicated by XC */
44#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
45                            /* have to be indicated by ARM which */
46                            /* shall be sent */
47#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
48                            /* have to be indicated by ARM which shall */
49                            /* be sent */
50#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */
51                            /* are confirmed */
52#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */
53                            /* packages are confirmed */
54#define PFIFO_MASK(xcno) (0x7f << (xcno*8))
55
56#define FIFO_PTR_FRAMELEN_SHIFT 0
57#define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0)
58#define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
59#define FIFO_PTR_TIMETRIG (1<<11)
60#define FIFO_PTR_MULTI_REQ
61#define FIFO_PTR_ORIGIN (1<<14)
62#define FIFO_PTR_VLAN (1<<15)
63#define FIFO_PTR_FRAMENO_SHIFT 16
64#define FIFO_PTR_FRAMENO_MASK (0x3f << 16)
65#define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
66#define FIFO_PTR_SEGMENT_SHIFT 22
67#define FIFO_PTR_SEGMENT_MASK (0xf << 22)
68#define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22)
69#define FIFO_PTR_ERROR_SHIFT 28
70#define FIFO_PTR_ERROR_MASK (0xf << 28)
71
72#define ISR_LINK_STATUS_CHANGE (1<<4)
73#define ISR_IND_LO (1<<3)
74#define ISR_CON_LO (1<<2)
75#define ISR_IND_HI (1<<1)
76#define ISR_CON_HI (1<<0)
77
78#define ETH_MAC_LOCAL_CONFIG 0x1560
79#define ETH_MAC_4321 0x1564
80#define ETH_MAC_65 0x1568
81
82#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
83#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
84#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
85#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
86#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
87#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
88#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
89#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)
90
91#define CARDNAME "netx-eth"
92
93/* LSB must be zero */
94#define INTERNAL_PHY_ADR 0x1c
95
96struct netx_eth_priv {
97    void __iomem *sram_base, *xpec_base, *xmac_base;
98    int id;
99    struct mii_if_info mii;
100    u32 msg_enable;
101    struct xc *xc;
102    spinlock_t lock;
103};
104
105static void netx_eth_set_multicast_list(struct net_device *ndev)
106{
107    /* implement me */
108}
109
110static int
111netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
112{
113    struct netx_eth_priv *priv = netdev_priv(ndev);
114    unsigned char *buf = skb->data;
115    unsigned int len = skb->len;
116
117    spin_lock_irq(&priv->lock);
118    memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
119    if (len < 60) {
120        memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
121        len = 60;
122    }
123
124    pfifo_push(REQ_FIFO_PORT_LO(priv->id),
125               FIFO_PTR_SEGMENT(priv->id) |
126               FIFO_PTR_FRAMENO(1) |
127               FIFO_PTR_FRAMELEN(len));
128
129    ndev->trans_start = jiffies;
130    ndev->stats.tx_packets++;
131    ndev->stats.tx_bytes += skb->len;
132
133    netif_stop_queue(ndev);
134    spin_unlock_irq(&priv->lock);
135    dev_kfree_skb(skb);
136
137    return 0;
138}
139
140static void netx_eth_receive(struct net_device *ndev)
141{
142    struct netx_eth_priv *priv = netdev_priv(ndev);
143    unsigned int val, frameno, seg, len;
144    unsigned char *data;
145    struct sk_buff *skb;
146
147    val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
148
149    frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
150    seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
151    len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;
152
153    skb = dev_alloc_skb(len);
154    if (unlikely(skb == NULL)) {
155        printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
156            ndev->name);
157        ndev->stats.rx_dropped++;
158        return;
159    }
160
161    data = skb_put(skb, len);
162
163    memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
164
165    pfifo_push(EMPTY_PTR_FIFO(priv->id),
166        FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
167
168    skb->protocol = eth_type_trans(skb, ndev);
169    netif_rx(skb);
170    ndev->stats.rx_packets++;
171    ndev->stats.rx_bytes += len;
172}
173
174static irqreturn_t
175netx_eth_interrupt(int irq, void *dev_id)
176{
177    struct net_device *ndev = dev_id;
178    struct netx_eth_priv *priv = netdev_priv(ndev);
179    int status;
180    unsigned long flags;
181
182    spin_lock_irqsave(&priv->lock, flags);
183
184    status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
185    while (status) {
186        int fill_level;
187        writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
188
189        if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
190            printk("%s: unexpected status: 0x%08x\n",
191                __func__, status);
192
193        fill_level =
194            readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
195        while (fill_level--)
196            netx_eth_receive(ndev);
197
198        if (status & ISR_CON_LO)
199            netif_wake_queue(ndev);
200
201        if (status & ISR_LINK_STATUS_CHANGE)
202            mii_check_media(&priv->mii, netif_msg_link(priv), 1);
203
204        status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
205    }
206    spin_unlock_irqrestore(&priv->lock, flags);
207    return IRQ_HANDLED;
208}
209
210static int netx_eth_open(struct net_device *ndev)
211{
212    struct netx_eth_priv *priv = netdev_priv(ndev);
213
214    if (request_irq
215        (ndev->irq, &netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
216        return -EAGAIN;
217
218    writel(ndev->dev_addr[0] |
219           ndev->dev_addr[1]<<8 |
220           ndev->dev_addr[2]<<16 |
221           ndev->dev_addr[3]<<24,
222           priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
223    writel(ndev->dev_addr[4] |
224           ndev->dev_addr[5]<<8,
225           priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
226
227    writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
228        LOCAL_CONFIG_CON_LO_IRQ_EN |
229        LOCAL_CONFIG_CON_HI_IRQ_EN |
230        LOCAL_CONFIG_IND_LO_IRQ_EN |
231        LOCAL_CONFIG_IND_HI_IRQ_EN,
232        priv->xpec_base + NETX_XPEC_RAM_START_OFS +
233        ETH_MAC_LOCAL_CONFIG);
234
235    mii_check_media(&priv->mii, netif_msg_link(priv), 1);
236    netif_start_queue(ndev);
237
238    return 0;
239}
240
241static int netx_eth_close(struct net_device *ndev)
242{
243    struct netx_eth_priv *priv = netdev_priv(ndev);
244
245    netif_stop_queue(ndev);
246
247    writel(0,
248        priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
249
250    free_irq(ndev->irq, ndev);
251
252    return 0;
253}
254
255static void netx_eth_timeout(struct net_device *ndev)
256{
257    struct netx_eth_priv *priv = netdev_priv(ndev);
258    int i;
259
260    printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
261
262    spin_lock_irq(&priv->lock);
263
264    xc_reset(priv->xc);
265    xc_start(priv->xc);
266
267    for (i=2; i<=18; i++)
268        pfifo_push(EMPTY_PTR_FIFO(priv->id),
269            FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
270
271    spin_unlock_irq(&priv->lock);
272
273    netif_wake_queue(ndev);
274}
275
276static int
277netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
278{
279    unsigned int val;
280
281    val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
282          MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
283
284    writel(val, NETX_MIIMU);
285    while (readl(NETX_MIIMU) & MIIMU_SNRDY);
286
287    return readl(NETX_MIIMU) >> 16;
288
289}
290
291static void
292netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
293{
294    unsigned int val;
295
296    val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
297          MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
298          MIIMU_DATA(value);
299
300    writel(val, NETX_MIIMU);
301    while (readl(NETX_MIIMU) & MIIMU_SNRDY);
302}
303
304static const struct net_device_ops netx_eth_netdev_ops = {
305    .ndo_open = netx_eth_open,
306    .ndo_stop = netx_eth_close,
307    .ndo_start_xmit = netx_eth_hard_start_xmit,
308    .ndo_tx_timeout = netx_eth_timeout,
309    .ndo_set_multicast_list = netx_eth_set_multicast_list,
310    .ndo_change_mtu = eth_change_mtu,
311    .ndo_validate_addr = eth_validate_addr,
312    .ndo_set_mac_address = eth_mac_addr,
313};
314
315static int netx_eth_enable(struct net_device *ndev)
316{
317    struct netx_eth_priv *priv = netdev_priv(ndev);
318    unsigned int mac4321, mac65;
319    int running, i;
320
321    ether_setup(ndev);
322
323    ndev->netdev_ops = &netx_eth_netdev_ops;
324    ndev->watchdog_timeo = msecs_to_jiffies(5000);
325
326    priv->msg_enable = NETIF_MSG_LINK;
327    priv->mii.phy_id_mask = 0x1f;
328    priv->mii.reg_num_mask = 0x1f;
329    priv->mii.force_media = 0;
330    priv->mii.full_duplex = 0;
331    priv->mii.dev = ndev;
332    priv->mii.mdio_read = netx_eth_phy_read;
333    priv->mii.mdio_write = netx_eth_phy_write;
334    priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
335
336    running = xc_running(priv->xc);
337    xc_stop(priv->xc);
338
339    /* if the xc engine is already running, assume the bootloader has
340     * loaded the firmware for us
341     */
342    if (running) {
343        /* get Node Address from hardware */
344        mac4321 = readl(priv->xpec_base +
345            NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
346        mac65 = readl(priv->xpec_base +
347            NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
348
349        ndev->dev_addr[0] = mac4321 & 0xff;
350        ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
351        ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
352        ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
353        ndev->dev_addr[4] = mac65 & 0xff;
354        ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
355    } else {
356        if (xc_request_firmware(priv->xc)) {
357            printk(CARDNAME ": requesting firmware failed\n");
358            return -ENODEV;
359        }
360    }
361
362    xc_reset(priv->xc);
363    xc_start(priv->xc);
364
365    if (!is_valid_ether_addr(ndev->dev_addr))
366        printk("%s: Invalid ethernet MAC address. Please "
367               "set using ifconfig\n", ndev->name);
368
369    for (i=2; i<=18; i++)
370        pfifo_push(EMPTY_PTR_FIFO(priv->id),
371            FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
372
373    return register_netdev(ndev);
374
375}
376
377static int netx_eth_drv_probe(struct platform_device *pdev)
378{
379    struct netx_eth_priv *priv;
380    struct net_device *ndev;
381    struct netxeth_platform_data *pdata;
382    int ret;
383
384    ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
385    if (!ndev) {
386        printk("%s: could not allocate device.\n", CARDNAME);
387        ret = -ENOMEM;
388        goto exit;
389    }
390    SET_NETDEV_DEV(ndev, &pdev->dev);
391
392    platform_set_drvdata(pdev, ndev);
393
394    priv = netdev_priv(ndev);
395
396    pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
397    priv->xc = request_xc(pdata->xcno, &pdev->dev);
398    if (!priv->xc) {
399        dev_err(&pdev->dev, "unable to request xc engine\n");
400        ret = -ENODEV;
401        goto exit_free_netdev;
402    }
403
404    ndev->irq = priv->xc->irq;
405    priv->id = pdev->id;
406    priv->xpec_base = priv->xc->xpec_base;
407    priv->xmac_base = priv->xc->xmac_base;
408    priv->sram_base = priv->xc->sram_base;
409
410    spin_lock_init(&priv->lock);
411
412    ret = pfifo_request(PFIFO_MASK(priv->id));
413    if (ret) {
414        printk("unable to request PFIFO\n");
415        goto exit_free_xc;
416    }
417
418    ret = netx_eth_enable(ndev);
419    if (ret)
420        goto exit_free_pfifo;
421
422    return 0;
423exit_free_pfifo:
424    pfifo_free(PFIFO_MASK(priv->id));
425exit_free_xc:
426    free_xc(priv->xc);
427exit_free_netdev:
428    platform_set_drvdata(pdev, NULL);
429    free_netdev(ndev);
430exit:
431    return ret;
432}
433
434static int netx_eth_drv_remove(struct platform_device *pdev)
435{
436    struct net_device *ndev = dev_get_drvdata(&pdev->dev);
437    struct netx_eth_priv *priv = netdev_priv(ndev);
438
439    platform_set_drvdata(pdev, NULL);
440
441    unregister_netdev(ndev);
442    xc_stop(priv->xc);
443    free_xc(priv->xc);
444    free_netdev(ndev);
445    pfifo_free(PFIFO_MASK(priv->id));
446
447    return 0;
448}
449
450static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
451{
452    dev_err(&pdev->dev, "suspend not implemented\n");
453    return 0;
454}
455
456static int netx_eth_drv_resume(struct platform_device *pdev)
457{
458    dev_err(&pdev->dev, "resume not implemented\n");
459    return 0;
460}
461
462static struct platform_driver netx_eth_driver = {
463    .probe = netx_eth_drv_probe,
464    .remove = netx_eth_drv_remove,
465    .suspend = netx_eth_drv_suspend,
466    .resume = netx_eth_drv_resume,
467    .driver = {
468        .name = CARDNAME,
469        .owner = THIS_MODULE,
470    },
471};
472
473static int __init netx_eth_init(void)
474{
475    unsigned int phy_control, val;
476
477    printk("NetX Ethernet driver\n");
478
479    phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
480              PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
481              PHY_CONTROL_PHY1_AUTOMDIX |
482              PHY_CONTROL_PHY1_EN |
483              PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
484              PHY_CONTROL_PHY0_AUTOMDIX |
485              PHY_CONTROL_PHY0_EN |
486              PHY_CONTROL_CLK_XLATIN;
487
488    val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
489    writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
490
491    writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
492    udelay(100);
493
494    val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
495    writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
496
497    writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
498
499    return platform_driver_register(&netx_eth_driver);
500}
501
502static void __exit netx_eth_cleanup(void)
503{
504    platform_driver_unregister(&netx_eth_driver);
505}
506
507module_init(netx_eth_init);
508module_exit(netx_eth_cleanup);
509
510MODULE_AUTHOR("Sascha Hauer, Pengutronix");
511MODULE_LICENSE("GPL");
512MODULE_ALIAS("platform:" CARDNAME);
513

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.2
jz-3.3
jz-3.4
jz47xx
jz47xx-2.6.38
master
xiangfu/openwrt/v3.0.0
xiangfu/openwrt/v3.2.1

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7



interactive