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/drivers/net/netx-eth.c

https://gitlab.com/TeamCarbonXtreme/android_kernel_samsung_bcm21553-common
C | 514 lines | 380 code | 101 blank | 33 comment | 22 complexity | de7d158cc8d65661dfe69ac4dbb29b0e MD5 | raw file
  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->stats.tx_packets++;
130	ndev->stats.tx_bytes += skb->len;
131
132	netif_stop_queue(ndev);
133	spin_unlock_irq(&priv->lock);
134	dev_kfree_skb(skb);
135
136	return NETDEV_TX_OK;
137}
138
139static void netx_eth_receive(struct net_device *ndev)
140{
141	struct netx_eth_priv *priv = netdev_priv(ndev);
142	unsigned int val, frameno, seg, len;
143	unsigned char *data;
144	struct sk_buff *skb;
145
146	val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
147
148	frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
149	seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
150	len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;
151
152	skb = dev_alloc_skb(len);
153	if (unlikely(skb == NULL)) {
154		printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
155			ndev->name);
156		ndev->stats.rx_dropped++;
157		return;
158	}
159
160	data = skb_put(skb, len);
161
162	memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
163
164	pfifo_push(EMPTY_PTR_FIFO(priv->id),
165		FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
166
167	skb->protocol = eth_type_trans(skb, ndev);
168	netif_rx(skb);
169	ndev->stats.rx_packets++;
170	ndev->stats.rx_bytes += len;
171}
172
173static irqreturn_t
174netx_eth_interrupt(int irq, void *dev_id)
175{
176	struct net_device *ndev = dev_id;
177	struct netx_eth_priv *priv = netdev_priv(ndev);
178	int status;
179	unsigned long flags;
180
181	spin_lock_irqsave(&priv->lock, flags);
182
183	status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
184	while (status) {
185		int fill_level;
186		writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
187
188		if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
189			printk("%s: unexpected status: 0x%08x\n",
190			    __func__, status);
191
192		fill_level =
193		    readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
194		while (fill_level--)
195			netx_eth_receive(ndev);
196
197		if (status & ISR_CON_LO)
198			netif_wake_queue(ndev);
199
200		if (status & ISR_LINK_STATUS_CHANGE)
201			mii_check_media(&priv->mii, netif_msg_link(priv), 1);
202
203		status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
204	}
205	spin_unlock_irqrestore(&priv->lock, flags);
206	return IRQ_HANDLED;
207}
208
209static int netx_eth_open(struct net_device *ndev)
210{
211	struct netx_eth_priv *priv = netdev_priv(ndev);
212
213	if (request_irq
214	    (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
215		return -EAGAIN;
216
217	writel(ndev->dev_addr[0] |
218	       ndev->dev_addr[1]<<8 |
219	       ndev->dev_addr[2]<<16 |
220	       ndev->dev_addr[3]<<24,
221	       priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
222	writel(ndev->dev_addr[4] |
223	       ndev->dev_addr[5]<<8,
224	       priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
225
226	writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
227		LOCAL_CONFIG_CON_LO_IRQ_EN |
228		LOCAL_CONFIG_CON_HI_IRQ_EN |
229		LOCAL_CONFIG_IND_LO_IRQ_EN |
230		LOCAL_CONFIG_IND_HI_IRQ_EN,
231		priv->xpec_base + NETX_XPEC_RAM_START_OFS +
232		ETH_MAC_LOCAL_CONFIG);
233
234	mii_check_media(&priv->mii, netif_msg_link(priv), 1);
235	netif_start_queue(ndev);
236
237	return 0;
238}
239
240static int netx_eth_close(struct net_device *ndev)
241{
242	struct netx_eth_priv *priv = netdev_priv(ndev);
243
244	netif_stop_queue(ndev);
245
246	writel(0,
247	    priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
248
249	free_irq(ndev->irq, ndev);
250
251	return 0;
252}
253
254static void netx_eth_timeout(struct net_device *ndev)
255{
256	struct netx_eth_priv *priv = netdev_priv(ndev);
257	int i;
258
259	printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
260
261	spin_lock_irq(&priv->lock);
262
263	xc_reset(priv->xc);
264	xc_start(priv->xc);
265
266	for (i=2; i<=18; i++)
267		pfifo_push(EMPTY_PTR_FIFO(priv->id),
268			FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
269
270	spin_unlock_irq(&priv->lock);
271
272	netif_wake_queue(ndev);
273}
274
275static int
276netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
277{
278	unsigned int val;
279
280	val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
281	      MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
282
283	writel(val, NETX_MIIMU);
284	while (readl(NETX_MIIMU) & MIIMU_SNRDY);
285
286	return readl(NETX_MIIMU) >> 16;
287
288}
289
290static void
291netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
292{
293	unsigned int val;
294
295	val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
296	      MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
297	      MIIMU_DATA(value);
298
299	writel(val, NETX_MIIMU);
300	while (readl(NETX_MIIMU) & MIIMU_SNRDY);
301}
302
303static const struct net_device_ops netx_eth_netdev_ops = {
304	.ndo_open		= netx_eth_open,
305	.ndo_stop		= netx_eth_close,
306	.ndo_start_xmit		= netx_eth_hard_start_xmit,
307	.ndo_tx_timeout		= netx_eth_timeout,
308	.ndo_set_multicast_list	= netx_eth_set_multicast_list,
309	.ndo_change_mtu		= eth_change_mtu,
310	.ndo_validate_addr	= eth_validate_addr,
311	.ndo_set_mac_address	= eth_mac_addr,
312};
313
314static int netx_eth_enable(struct net_device *ndev)
315{
316	struct netx_eth_priv *priv = netdev_priv(ndev);
317	unsigned int mac4321, mac65;
318	int running, i;
319
320	ether_setup(ndev);
321
322	ndev->netdev_ops = &netx_eth_netdev_ops;
323	ndev->watchdog_timeo = msecs_to_jiffies(5000);
324
325	priv->msg_enable       = NETIF_MSG_LINK;
326	priv->mii.phy_id_mask  = 0x1f;
327	priv->mii.reg_num_mask = 0x1f;
328	priv->mii.force_media  = 0;
329	priv->mii.full_duplex  = 0;
330	priv->mii.dev	     = ndev;
331	priv->mii.mdio_read    = netx_eth_phy_read;
332	priv->mii.mdio_write   = netx_eth_phy_write;
333	priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
334
335	running = xc_running(priv->xc);
336	xc_stop(priv->xc);
337
338	/* if the xc engine is already running, assume the bootloader has
339	 * loaded the firmware for us
340	 */
341	if (running) {
342		/* get Node Address from hardware */
343		mac4321 = readl(priv->xpec_base +
344			NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
345		mac65 = readl(priv->xpec_base +
346			NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
347
348		ndev->dev_addr[0] = mac4321 & 0xff;
349		ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
350		ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
351		ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
352		ndev->dev_addr[4] = mac65 & 0xff;
353		ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
354	} else {
355		if (xc_request_firmware(priv->xc)) {
356			printk(CARDNAME ": requesting firmware failed\n");
357			return -ENODEV;
358		}
359	}
360
361	xc_reset(priv->xc);
362	xc_start(priv->xc);
363
364	if (!is_valid_ether_addr(ndev->dev_addr))
365		printk("%s: Invalid ethernet MAC address.  Please "
366		       "set using ifconfig\n", ndev->name);
367
368	for (i=2; i<=18; i++)
369		pfifo_push(EMPTY_PTR_FIFO(priv->id),
370			FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
371
372	return register_netdev(ndev);
373
374}
375
376static int netx_eth_drv_probe(struct platform_device *pdev)
377{
378	struct netx_eth_priv *priv;
379	struct net_device *ndev;
380	struct netxeth_platform_data *pdata;
381	int ret;
382
383	ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
384	if (!ndev) {
385		printk("%s: could not allocate device.\n", CARDNAME);
386		ret = -ENOMEM;
387		goto exit;
388	}
389	SET_NETDEV_DEV(ndev, &pdev->dev);
390
391	platform_set_drvdata(pdev, ndev);
392
393	priv = netdev_priv(ndev);
394
395	pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
396	priv->xc = request_xc(pdata->xcno, &pdev->dev);
397	if (!priv->xc) {
398		dev_err(&pdev->dev, "unable to request xc engine\n");
399		ret = -ENODEV;
400		goto exit_free_netdev;
401	}
402
403	ndev->irq = priv->xc->irq;
404	priv->id = pdev->id;
405	priv->xpec_base = priv->xc->xpec_base;
406	priv->xmac_base = priv->xc->xmac_base;
407	priv->sram_base = priv->xc->sram_base;
408
409	spin_lock_init(&priv->lock);
410
411	ret = pfifo_request(PFIFO_MASK(priv->id));
412	if (ret) {
413		printk("unable to request PFIFO\n");
414		goto exit_free_xc;
415	}
416
417	ret = netx_eth_enable(ndev);
418	if (ret)
419		goto exit_free_pfifo;
420
421	return 0;
422exit_free_pfifo:
423	pfifo_free(PFIFO_MASK(priv->id));
424exit_free_xc:
425	free_xc(priv->xc);
426exit_free_netdev:
427	platform_set_drvdata(pdev, NULL);
428	free_netdev(ndev);
429exit:
430	return ret;
431}
432
433static int netx_eth_drv_remove(struct platform_device *pdev)
434{
435	struct net_device *ndev = dev_get_drvdata(&pdev->dev);
436	struct netx_eth_priv *priv = netdev_priv(ndev);
437
438	platform_set_drvdata(pdev, NULL);
439
440	unregister_netdev(ndev);
441	xc_stop(priv->xc);
442	free_xc(priv->xc);
443	free_netdev(ndev);
444	pfifo_free(PFIFO_MASK(priv->id));
445
446	return 0;
447}
448
449static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
450{
451	dev_err(&pdev->dev, "suspend not implemented\n");
452	return 0;
453}
454
455static int netx_eth_drv_resume(struct platform_device *pdev)
456{
457	dev_err(&pdev->dev, "resume not implemented\n");
458	return 0;
459}
460
461static struct platform_driver netx_eth_driver = {
462	.probe		= netx_eth_drv_probe,
463	.remove		= netx_eth_drv_remove,
464	.suspend	= netx_eth_drv_suspend,
465	.resume		= netx_eth_drv_resume,
466	.driver		= {
467		.name	= CARDNAME,
468		.owner	= THIS_MODULE,
469	},
470};
471
472static int __init netx_eth_init(void)
473{
474	unsigned int phy_control, val;
475
476	printk("NetX Ethernet driver\n");
477
478	phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
479		      PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
480		      PHY_CONTROL_PHY1_AUTOMDIX |
481		      PHY_CONTROL_PHY1_EN |
482		      PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
483		      PHY_CONTROL_PHY0_AUTOMDIX |
484		      PHY_CONTROL_PHY0_EN |
485		      PHY_CONTROL_CLK_XLATIN;
486
487	val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
488	writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
489
490	writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
491	udelay(100);
492
493	val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
494	writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
495
496	writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
497
498	return platform_driver_register(&netx_eth_driver);
499}
500
501static void __exit netx_eth_cleanup(void)
502{
503	platform_driver_unregister(&netx_eth_driver);
504}
505
506module_init(netx_eth_init);
507module_exit(netx_eth_cleanup);
508
509MODULE_AUTHOR("Sascha Hauer, Pengutronix");
510MODULE_LICENSE("GPL");
511MODULE_ALIAS("platform:" CARDNAME);
512MODULE_FIRMWARE("xc0.bin");
513MODULE_FIRMWARE("xc1.bin");
514MODULE_FIRMWARE("xc2.bin");