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Bryan Wue190d6b2007-07-17 14:43:44 +08001/*
Mike Frysinger2fb9d6f2008-01-30 16:52:24 +08002 * Blackfin On-Chip MAC Driver
Bryan Wue190d6b2007-07-17 14:43:44 +08003 *
Mike Frysinger2fb9d6f2008-01-30 16:52:24 +08004 * Copyright 2004-2007 Analog Devices Inc.
Bryan Wue190d6b2007-07-17 14:43:44 +08005 *
Mike Frysinger2fb9d6f2008-01-30 16:52:24 +08006 * Enter bugs at http://blackfin.uclinux.org/
Bryan Wue190d6b2007-07-17 14:43:44 +08007 *
Mike Frysinger2fb9d6f2008-01-30 16:52:24 +08008 * Licensed under the GPL-2 or later.
Bryan Wue190d6b2007-07-17 14:43:44 +08009 */
10
11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/sched.h>
15#include <linux/slab.h>
16#include <linux/delay.h>
17#include <linux/timer.h>
18#include <linux/errno.h>
19#include <linux/irq.h>
20#include <linux/io.h>
21#include <linux/ioport.h>
22#include <linux/crc32.h>
23#include <linux/device.h>
24#include <linux/spinlock.h>
Bryan Wue190d6b2007-07-17 14:43:44 +080025#include <linux/mii.h>
Bryan Wu4ae5a3a2007-09-19 23:37:36 +080026#include <linux/phy.h>
Bryan Wue190d6b2007-07-17 14:43:44 +080027#include <linux/netdevice.h>
28#include <linux/etherdevice.h>
Bryan Wu679dce32008-04-25 11:53:11 +080029#include <linux/ethtool.h>
Bryan Wue190d6b2007-07-17 14:43:44 +080030#include <linux/skbuff.h>
Bryan Wue190d6b2007-07-17 14:43:44 +080031#include <linux/platform_device.h>
Bryan Wue190d6b2007-07-17 14:43:44 +080032
33#include <asm/dma.h>
34#include <linux/dma-mapping.h>
35
36#include <asm/blackfin.h>
37#include <asm/cacheflush.h>
38#include <asm/portmux.h>
39
40#include "bfin_mac.h"
41
42#define DRV_NAME "bfin_mac"
43#define DRV_VERSION "1.1"
44#define DRV_AUTHOR "Bryan Wu, Luke Yang"
Bryan Wu7ef0a7e2008-04-25 11:53:10 +080045#define DRV_DESC "Blackfin on-chip Ethernet MAC driver"
Bryan Wue190d6b2007-07-17 14:43:44 +080046
47MODULE_AUTHOR(DRV_AUTHOR);
48MODULE_LICENSE("GPL");
49MODULE_DESCRIPTION(DRV_DESC);
Kay Sievers72abb462008-04-18 13:50:44 -070050MODULE_ALIAS("platform:bfin_mac");
Bryan Wue190d6b2007-07-17 14:43:44 +080051
52#if defined(CONFIG_BFIN_MAC_USE_L1)
53# define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size)
54# define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr)
55#else
56# define bfin_mac_alloc(dma_handle, size) \
57 dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL)
58# define bfin_mac_free(dma_handle, ptr) \
59 dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle)
60#endif
61
62#define PKT_BUF_SZ 1580
63
64#define MAX_TIMEOUT_CNT 500
65
66/* pointers to maintain transmit list */
67static struct net_dma_desc_tx *tx_list_head;
68static struct net_dma_desc_tx *tx_list_tail;
69static struct net_dma_desc_rx *rx_list_head;
70static struct net_dma_desc_rx *rx_list_tail;
71static struct net_dma_desc_rx *current_rx_ptr;
72static struct net_dma_desc_tx *current_tx_ptr;
73static struct net_dma_desc_tx *tx_desc;
74static struct net_dma_desc_rx *rx_desc;
75
Bryan Wu7ef0a7e2008-04-25 11:53:10 +080076#if defined(CONFIG_BFIN_MAC_RMII)
77static u16 pin_req[] = P_RMII0;
78#else
79static u16 pin_req[] = P_MII0;
80#endif
81
82static void bfin_mac_disable(void);
83static void bfin_mac_enable(void);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +080084
Bryan Wue190d6b2007-07-17 14:43:44 +080085static void desc_list_free(void)
86{
87 struct net_dma_desc_rx *r;
88 struct net_dma_desc_tx *t;
89 int i;
90#if !defined(CONFIG_BFIN_MAC_USE_L1)
91 dma_addr_t dma_handle = 0;
92#endif
93
94 if (tx_desc) {
95 t = tx_list_head;
96 for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
97 if (t) {
98 if (t->skb) {
99 dev_kfree_skb(t->skb);
100 t->skb = NULL;
101 }
102 t = t->next;
103 }
104 }
105 bfin_mac_free(dma_handle, tx_desc);
106 }
107
108 if (rx_desc) {
109 r = rx_list_head;
110 for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
111 if (r) {
112 if (r->skb) {
113 dev_kfree_skb(r->skb);
114 r->skb = NULL;
115 }
116 r = r->next;
117 }
118 }
119 bfin_mac_free(dma_handle, rx_desc);
120 }
121}
122
123static int desc_list_init(void)
124{
125 int i;
126 struct sk_buff *new_skb;
127#if !defined(CONFIG_BFIN_MAC_USE_L1)
128 /*
129 * This dma_handle is useless in Blackfin dma_alloc_coherent().
130 * The real dma handler is the return value of dma_alloc_coherent().
131 */
132 dma_addr_t dma_handle;
133#endif
134
135 tx_desc = bfin_mac_alloc(&dma_handle,
136 sizeof(struct net_dma_desc_tx) *
137 CONFIG_BFIN_TX_DESC_NUM);
138 if (tx_desc == NULL)
139 goto init_error;
140
141 rx_desc = bfin_mac_alloc(&dma_handle,
142 sizeof(struct net_dma_desc_rx) *
143 CONFIG_BFIN_RX_DESC_NUM);
144 if (rx_desc == NULL)
145 goto init_error;
146
147 /* init tx_list */
148 tx_list_head = tx_list_tail = tx_desc;
149
150 for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
151 struct net_dma_desc_tx *t = tx_desc + i;
152 struct dma_descriptor *a = &(t->desc_a);
153 struct dma_descriptor *b = &(t->desc_b);
154
155 /*
156 * disable DMA
157 * read from memory WNR = 0
158 * wordsize is 32 bits
159 * 6 half words is desc size
160 * large desc flow
161 */
162 a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
163 a->start_addr = (unsigned long)t->packet;
164 a->x_count = 0;
165 a->next_dma_desc = b;
166
167 /*
168 * enabled DMA
169 * write to memory WNR = 1
170 * wordsize is 32 bits
171 * disable interrupt
172 * 6 half words is desc size
173 * large desc flow
174 */
175 b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
176 b->start_addr = (unsigned long)(&(t->status));
177 b->x_count = 0;
178
179 t->skb = NULL;
180 tx_list_tail->desc_b.next_dma_desc = a;
181 tx_list_tail->next = t;
182 tx_list_tail = t;
183 }
184 tx_list_tail->next = tx_list_head; /* tx_list is a circle */
185 tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a);
186 current_tx_ptr = tx_list_head;
187
188 /* init rx_list */
189 rx_list_head = rx_list_tail = rx_desc;
190
191 for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
192 struct net_dma_desc_rx *r = rx_desc + i;
193 struct dma_descriptor *a = &(r->desc_a);
194 struct dma_descriptor *b = &(r->desc_b);
195
196 /* allocate a new skb for next time receive */
Michael Hennerich015dac82009-05-29 03:41:15 +0000197 new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN);
Bryan Wue190d6b2007-07-17 14:43:44 +0800198 if (!new_skb) {
199 printk(KERN_NOTICE DRV_NAME
200 ": init: low on mem - packet dropped\n");
201 goto init_error;
202 }
Michael Hennerich015dac82009-05-29 03:41:15 +0000203 skb_reserve(new_skb, NET_IP_ALIGN);
Bryan Wue190d6b2007-07-17 14:43:44 +0800204 r->skb = new_skb;
205
206 /*
207 * enabled DMA
208 * write to memory WNR = 1
209 * wordsize is 32 bits
210 * disable interrupt
211 * 6 half words is desc size
212 * large desc flow
213 */
214 a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
215 /* since RXDWA is enabled */
216 a->start_addr = (unsigned long)new_skb->data - 2;
217 a->x_count = 0;
218 a->next_dma_desc = b;
219
220 /*
221 * enabled DMA
222 * write to memory WNR = 1
223 * wordsize is 32 bits
224 * enable interrupt
225 * 6 half words is desc size
226 * large desc flow
227 */
228 b->config = DMAEN | WNR | WDSIZE_32 | DI_EN |
229 NDSIZE_6 | DMAFLOW_LARGE;
230 b->start_addr = (unsigned long)(&(r->status));
231 b->x_count = 0;
232
233 rx_list_tail->desc_b.next_dma_desc = a;
234 rx_list_tail->next = r;
235 rx_list_tail = r;
236 }
237 rx_list_tail->next = rx_list_head; /* rx_list is a circle */
238 rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a);
239 current_rx_ptr = rx_list_head;
240
241 return 0;
242
243init_error:
244 desc_list_free();
245 printk(KERN_ERR DRV_NAME ": kmalloc failed\n");
246 return -ENOMEM;
247}
248
249
250/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
251
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800252/*
253 * MII operations
254 */
Bryan Wue190d6b2007-07-17 14:43:44 +0800255/* Wait until the previous MDC/MDIO transaction has completed */
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700256static void bfin_mdio_poll(void)
Bryan Wue190d6b2007-07-17 14:43:44 +0800257{
258 int timeout_cnt = MAX_TIMEOUT_CNT;
259
260 /* poll the STABUSY bit */
261 while ((bfin_read_EMAC_STAADD()) & STABUSY) {
Bryan Wu6db9e462008-01-30 16:52:21 +0800262 udelay(1);
Bryan Wue190d6b2007-07-17 14:43:44 +0800263 if (timeout_cnt-- < 0) {
264 printk(KERN_ERR DRV_NAME
265 ": wait MDC/MDIO transaction to complete timeout\n");
266 break;
267 }
268 }
269}
270
271/* Read an off-chip register in a PHY through the MDC/MDIO port */
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700272static int bfin_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
Bryan Wue190d6b2007-07-17 14:43:44 +0800273{
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700274 bfin_mdio_poll();
Bryan Wue190d6b2007-07-17 14:43:44 +0800275
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800276 /* read mode */
277 bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
278 SET_REGAD((u16) regnum) |
279 STABUSY);
280
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700281 bfin_mdio_poll();
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800282
283 return (int) bfin_read_EMAC_STADAT();
Bryan Wue190d6b2007-07-17 14:43:44 +0800284}
285
286/* Write an off-chip register in a PHY through the MDC/MDIO port */
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700287static int bfin_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
288 u16 value)
Bryan Wue190d6b2007-07-17 14:43:44 +0800289{
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700290 bfin_mdio_poll();
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800291
292 bfin_write_EMAC_STADAT((u32) value);
Bryan Wue190d6b2007-07-17 14:43:44 +0800293
294 /* write mode */
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800295 bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) |
296 SET_REGAD((u16) regnum) |
Bryan Wue190d6b2007-07-17 14:43:44 +0800297 STAOP |
298 STABUSY);
299
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700300 bfin_mdio_poll();
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800301
302 return 0;
Bryan Wue190d6b2007-07-17 14:43:44 +0800303}
304
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700305static int bfin_mdiobus_reset(struct mii_bus *bus)
Bryan Wue190d6b2007-07-17 14:43:44 +0800306{
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800307 return 0;
Bryan Wue190d6b2007-07-17 14:43:44 +0800308}
309
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800310static void bfin_mac_adjust_link(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800311{
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800312 struct bfin_mac_local *lp = netdev_priv(dev);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800313 struct phy_device *phydev = lp->phydev;
314 unsigned long flags;
315 int new_state = 0;
Bryan Wue190d6b2007-07-17 14:43:44 +0800316
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800317 spin_lock_irqsave(&lp->lock, flags);
318 if (phydev->link) {
319 /* Now we make sure that we can be in full duplex mode.
320 * If not, we operate in half-duplex mode. */
321 if (phydev->duplex != lp->old_duplex) {
322 u32 opmode = bfin_read_EMAC_OPMODE();
323 new_state = 1;
Bryan Wue190d6b2007-07-17 14:43:44 +0800324
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800325 if (phydev->duplex)
326 opmode |= FDMODE;
327 else
328 opmode &= ~(FDMODE);
Bryan Wue190d6b2007-07-17 14:43:44 +0800329
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800330 bfin_write_EMAC_OPMODE(opmode);
331 lp->old_duplex = phydev->duplex;
332 }
Bryan Wue190d6b2007-07-17 14:43:44 +0800333
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800334 if (phydev->speed != lp->old_speed) {
335#if defined(CONFIG_BFIN_MAC_RMII)
336 u32 opmode = bfin_read_EMAC_OPMODE();
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800337 switch (phydev->speed) {
338 case 10:
339 opmode |= RMII_10;
340 break;
341 case 100:
342 opmode &= ~(RMII_10);
343 break;
344 default:
345 printk(KERN_WARNING
346 "%s: Ack! Speed (%d) is not 10/100!\n",
347 DRV_NAME, phydev->speed);
348 break;
349 }
350 bfin_write_EMAC_OPMODE(opmode);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800351#endif
Bryan Wue190d6b2007-07-17 14:43:44 +0800352
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800353 new_state = 1;
354 lp->old_speed = phydev->speed;
355 }
Bryan Wue190d6b2007-07-17 14:43:44 +0800356
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800357 if (!lp->old_link) {
358 new_state = 1;
359 lp->old_link = 1;
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800360 }
361 } else if (lp->old_link) {
362 new_state = 1;
363 lp->old_link = 0;
364 lp->old_speed = 0;
365 lp->old_duplex = -1;
Bryan Wue190d6b2007-07-17 14:43:44 +0800366 }
367
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800368 if (new_state) {
369 u32 opmode = bfin_read_EMAC_OPMODE();
370 phy_print_status(phydev);
371 pr_debug("EMAC_OPMODE = 0x%08x\n", opmode);
Bryan Wue190d6b2007-07-17 14:43:44 +0800372 }
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800373
374 spin_unlock_irqrestore(&lp->lock, flags);
375}
376
Bryan Wu7cc8f382008-01-30 16:52:22 +0800377/* MDC = 2.5 MHz */
378#define MDC_CLK 2500000
379
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800380static int mii_probe(struct net_device *dev)
381{
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800382 struct bfin_mac_local *lp = netdev_priv(dev);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800383 struct phy_device *phydev = NULL;
384 unsigned short sysctl;
385 int i;
Bryan Wu7cc8f382008-01-30 16:52:22 +0800386 u32 sclk, mdc_div;
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800387
388 /* Enable PHY output early */
389 if (!(bfin_read_VR_CTL() & PHYCLKOE))
390 bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
391
Bryan Wu7cc8f382008-01-30 16:52:22 +0800392 sclk = get_sclk();
393 mdc_div = ((sclk / MDC_CLK) / 2) - 1;
394
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800395 sysctl = bfin_read_EMAC_SYSCTL();
Bryan Wu9dc7f302008-01-30 16:52:28 +0800396 sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800397 bfin_write_EMAC_SYSCTL(sysctl);
398
399 /* search for connect PHY device */
400 for (i = 0; i < PHY_MAX_ADDR; i++) {
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700401 struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i];
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800402
403 if (!tmp_phydev)
404 continue; /* no PHY here... */
405
406 phydev = tmp_phydev;
407 break; /* found it */
408 }
409
410 /* now we are supposed to have a proper phydev, to attach to... */
411 if (!phydev) {
412 printk(KERN_INFO "%s: Don't found any phy device at all\n",
413 dev->name);
414 return -ENODEV;
415 }
416
417#if defined(CONFIG_BFIN_MAC_RMII)
Kay Sieversc2313552009-03-24 16:38:22 -0700418 phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link,
419 0, PHY_INTERFACE_MODE_RMII);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800420#else
Kay Sieversc2313552009-03-24 16:38:22 -0700421 phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link,
422 0, PHY_INTERFACE_MODE_MII);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800423#endif
424
425 if (IS_ERR(phydev)) {
426 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
427 return PTR_ERR(phydev);
428 }
429
430 /* mask with MAC supported features */
431 phydev->supported &= (SUPPORTED_10baseT_Half
432 | SUPPORTED_10baseT_Full
433 | SUPPORTED_100baseT_Half
434 | SUPPORTED_100baseT_Full
435 | SUPPORTED_Autoneg
436 | SUPPORTED_Pause | SUPPORTED_Asym_Pause
437 | SUPPORTED_MII
438 | SUPPORTED_TP);
439
440 phydev->advertising = phydev->supported;
441
442 lp->old_link = 0;
443 lp->old_speed = 0;
444 lp->old_duplex = -1;
445 lp->phydev = phydev;
446
447 printk(KERN_INFO "%s: attached PHY driver [%s] "
Bryan Wu7cc8f382008-01-30 16:52:22 +0800448 "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
449 "@sclk=%dMHz)\n",
Kay Sieversc2313552009-03-24 16:38:22 -0700450 DRV_NAME, phydev->drv->name, dev_name(&phydev->dev), phydev->irq,
Bryan Wu7cc8f382008-01-30 16:52:22 +0800451 MDC_CLK, mdc_div, sclk/1000000);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800452
453 return 0;
Bryan Wue190d6b2007-07-17 14:43:44 +0800454}
455
Bryan Wu679dce32008-04-25 11:53:11 +0800456/*
457 * Ethtool support
458 */
459
460static int
461bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
462{
463 struct bfin_mac_local *lp = netdev_priv(dev);
464
465 if (lp->phydev)
466 return phy_ethtool_gset(lp->phydev, cmd);
467
468 return -EINVAL;
469}
470
471static int
472bfin_mac_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
473{
474 struct bfin_mac_local *lp = netdev_priv(dev);
475
476 if (!capable(CAP_NET_ADMIN))
477 return -EPERM;
478
479 if (lp->phydev)
480 return phy_ethtool_sset(lp->phydev, cmd);
481
482 return -EINVAL;
483}
484
485static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev,
486 struct ethtool_drvinfo *info)
487{
488 strcpy(info->driver, DRV_NAME);
489 strcpy(info->version, DRV_VERSION);
490 strcpy(info->fw_version, "N/A");
Kay Sieversc2313552009-03-24 16:38:22 -0700491 strcpy(info->bus_info, dev_name(&dev->dev));
Bryan Wu679dce32008-04-25 11:53:11 +0800492}
493
Stephen Hemminger0fc0b732009-09-02 01:03:33 -0700494static const struct ethtool_ops bfin_mac_ethtool_ops = {
Bryan Wu679dce32008-04-25 11:53:11 +0800495 .get_settings = bfin_mac_ethtool_getsettings,
496 .set_settings = bfin_mac_ethtool_setsettings,
497 .get_link = ethtool_op_get_link,
498 .get_drvinfo = bfin_mac_ethtool_getdrvinfo,
499};
500
Bryan Wue190d6b2007-07-17 14:43:44 +0800501/**************************************************************************/
502void setup_system_regs(struct net_device *dev)
503{
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800504 unsigned short sysctl;
Bryan Wue190d6b2007-07-17 14:43:44 +0800505
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800506 /*
507 * Odd word alignment for Receive Frame DMA word
508 * Configure checksum support and rcve frame word alignment
509 */
510 sysctl = bfin_read_EMAC_SYSCTL();
Bryan Wue190d6b2007-07-17 14:43:44 +0800511#if defined(BFIN_MAC_CSUM_OFFLOAD)
512 sysctl |= RXDWA | RXCKS;
513#else
514 sysctl |= RXDWA;
515#endif
516 bfin_write_EMAC_SYSCTL(sysctl);
Bryan Wue190d6b2007-07-17 14:43:44 +0800517
518 bfin_write_EMAC_MMC_CTL(RSTC | CROLL);
519
520 /* Initialize the TX DMA channel registers */
521 bfin_write_DMA2_X_COUNT(0);
522 bfin_write_DMA2_X_MODIFY(4);
523 bfin_write_DMA2_Y_COUNT(0);
524 bfin_write_DMA2_Y_MODIFY(0);
525
526 /* Initialize the RX DMA channel registers */
527 bfin_write_DMA1_X_COUNT(0);
528 bfin_write_DMA1_X_MODIFY(4);
529 bfin_write_DMA1_Y_COUNT(0);
530 bfin_write_DMA1_Y_MODIFY(0);
531}
532
Alex Landau73f83182007-09-19 23:14:18 +0800533static void setup_mac_addr(u8 *mac_addr)
Bryan Wue190d6b2007-07-17 14:43:44 +0800534{
535 u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]);
536 u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]);
537
538 /* this depends on a little-endian machine */
539 bfin_write_EMAC_ADDRLO(addr_low);
540 bfin_write_EMAC_ADDRHI(addr_hi);
541}
542
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800543static int bfin_mac_set_mac_address(struct net_device *dev, void *p)
Alex Landau73f83182007-09-19 23:14:18 +0800544{
545 struct sockaddr *addr = p;
546 if (netif_running(dev))
547 return -EBUSY;
548 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
549 setup_mac_addr(dev->dev_addr);
550 return 0;
551}
552
Bryan Wue190d6b2007-07-17 14:43:44 +0800553static void adjust_tx_list(void)
554{
555 int timeout_cnt = MAX_TIMEOUT_CNT;
556
557 if (tx_list_head->status.status_word != 0
558 && current_tx_ptr != tx_list_head) {
559 goto adjust_head; /* released something, just return; */
560 }
561
562 /*
563 * if nothing released, check wait condition
564 * current's next can not be the head,
565 * otherwise the dma will not stop as we want
566 */
567 if (current_tx_ptr->next->next == tx_list_head) {
568 while (tx_list_head->status.status_word == 0) {
Michael Hennerich015dac82009-05-29 03:41:15 +0000569 udelay(10);
Bryan Wue190d6b2007-07-17 14:43:44 +0800570 if (tx_list_head->status.status_word != 0
Michael Hennerich015dac82009-05-29 03:41:15 +0000571 || !(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) {
Bryan Wue190d6b2007-07-17 14:43:44 +0800572 goto adjust_head;
573 }
574 if (timeout_cnt-- < 0) {
575 printk(KERN_ERR DRV_NAME
576 ": wait for adjust tx list head timeout\n");
577 break;
578 }
579 }
580 if (tx_list_head->status.status_word != 0) {
581 goto adjust_head;
582 }
583 }
584
585 return;
586
587adjust_head:
588 do {
589 tx_list_head->desc_a.config &= ~DMAEN;
590 tx_list_head->status.status_word = 0;
591 if (tx_list_head->skb) {
592 dev_kfree_skb(tx_list_head->skb);
593 tx_list_head->skb = NULL;
594 } else {
595 printk(KERN_ERR DRV_NAME
596 ": no sk_buff in a transmitted frame!\n");
597 }
598 tx_list_head = tx_list_head->next;
599 } while (tx_list_head->status.status_word != 0
600 && current_tx_ptr != tx_list_head);
601 return;
602
603}
604
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800605static int bfin_mac_hard_start_xmit(struct sk_buff *skb,
Bryan Wue190d6b2007-07-17 14:43:44 +0800606 struct net_device *dev)
607{
Bryan Wua50c0c02008-07-27 22:45:04 +0800608 u16 *data;
Michael Hennerich015dac82009-05-29 03:41:15 +0000609 u32 data_align = (unsigned long)(skb->data) & 0x3;
Bryan Wue190d6b2007-07-17 14:43:44 +0800610 current_tx_ptr->skb = skb;
611
Michael Hennerich015dac82009-05-29 03:41:15 +0000612 if (data_align == 0x2) {
613 /* move skb->data to current_tx_ptr payload */
614 data = (u16 *)(skb->data) - 1;
615 *data = (u16)(skb->len);
616 current_tx_ptr->desc_a.start_addr = (u32)data;
617 /* this is important! */
618 blackfin_dcache_flush_range((u32)data,
619 (u32)((u8 *)data + skb->len + 4));
Bryan Wue190d6b2007-07-17 14:43:44 +0800620 } else {
Michael Hennerich015dac82009-05-29 03:41:15 +0000621 *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len);
622 memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data,
623 skb->len);
624 current_tx_ptr->desc_a.start_addr =
625 (u32)current_tx_ptr->packet;
626 if (current_tx_ptr->status.status_word != 0)
627 current_tx_ptr->status.status_word = 0;
628 blackfin_dcache_flush_range(
629 (u32)current_tx_ptr->packet,
630 (u32)(current_tx_ptr->packet + skb->len + 2));
Bryan Wue190d6b2007-07-17 14:43:44 +0800631 }
632
Sonic Zhang805a8ab2009-05-29 03:40:43 +0000633 /* make sure the internal data buffers in the core are drained
634 * so that the DMA descriptors are completely written when the
635 * DMA engine goes to fetch them below
636 */
637 SSYNC();
638
Bryan Wue190d6b2007-07-17 14:43:44 +0800639 /* enable this packet's dma */
640 current_tx_ptr->desc_a.config |= DMAEN;
641
642 /* tx dma is running, just return */
Michael Hennerich015dac82009-05-29 03:41:15 +0000643 if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)
Bryan Wue190d6b2007-07-17 14:43:44 +0800644 goto out;
645
646 /* tx dma is not running */
647 bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a));
648 /* dma enabled, read from memory, size is 6 */
649 bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config);
650 /* Turn on the EMAC tx */
651 bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE);
652
653out:
654 adjust_tx_list();
655 current_tx_ptr = current_tx_ptr->next;
656 dev->trans_start = jiffies;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700657 dev->stats.tx_packets++;
658 dev->stats.tx_bytes += (skb->len);
Patrick McHardy6ed10652009-06-23 06:03:08 +0000659 return NETDEV_TX_OK;
Bryan Wue190d6b2007-07-17 14:43:44 +0800660}
661
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800662static void bfin_mac_rx(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800663{
664 struct sk_buff *skb, *new_skb;
Bryan Wue190d6b2007-07-17 14:43:44 +0800665 unsigned short len;
666
667 /* allocate a new skb for next time receive */
668 skb = current_rx_ptr->skb;
Michael Hennerich015dac82009-05-29 03:41:15 +0000669 new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN);
Bryan Wue190d6b2007-07-17 14:43:44 +0800670 if (!new_skb) {
671 printk(KERN_NOTICE DRV_NAME
672 ": rx: low on mem - packet dropped\n");
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700673 dev->stats.rx_dropped++;
Bryan Wue190d6b2007-07-17 14:43:44 +0800674 goto out;
675 }
676 /* reserve 2 bytes for RXDWA padding */
Michael Hennerich015dac82009-05-29 03:41:15 +0000677 skb_reserve(new_skb, NET_IP_ALIGN);
Bryan Wue190d6b2007-07-17 14:43:44 +0800678 current_rx_ptr->skb = new_skb;
679 current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
680
Alexey Demin6e01d1a2008-01-30 16:52:27 +0800681 /* Invidate the data cache of skb->data range when it is write back
682 * cache. It will prevent overwritting the new data from DMA
683 */
684 blackfin_dcache_invalidate_range((unsigned long)new_skb->head,
685 (unsigned long)new_skb->end);
686
Bryan Wue190d6b2007-07-17 14:43:44 +0800687 len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
688 skb_put(skb, len);
689 blackfin_dcache_invalidate_range((unsigned long)skb->head,
690 (unsigned long)skb->tail);
691
Bryan Wue190d6b2007-07-17 14:43:44 +0800692 skb->protocol = eth_type_trans(skb, dev);
693#if defined(BFIN_MAC_CSUM_OFFLOAD)
694 skb->csum = current_rx_ptr->status.ip_payload_csum;
Vitja Makarov00ff49a2007-11-23 17:55:51 +0800695 skb->ip_summed = CHECKSUM_COMPLETE;
Bryan Wue190d6b2007-07-17 14:43:44 +0800696#endif
697
698 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700699 dev->stats.rx_packets++;
700 dev->stats.rx_bytes += len;
Bryan Wue190d6b2007-07-17 14:43:44 +0800701 current_rx_ptr->status.status_word = 0x00000000;
702 current_rx_ptr = current_rx_ptr->next;
703
704out:
705 return;
706}
707
708/* interrupt routine to handle rx and error signal */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800709static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id)
Bryan Wue190d6b2007-07-17 14:43:44 +0800710{
711 struct net_device *dev = dev_id;
712 int number = 0;
713
714get_one_packet:
715 if (current_rx_ptr->status.status_word == 0) {
716 /* no more new packet received */
717 if (number == 0) {
718 if (current_rx_ptr->next->status.status_word != 0) {
719 current_rx_ptr = current_rx_ptr->next;
720 goto real_rx;
721 }
722 }
723 bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
724 DMA_DONE | DMA_ERR);
725 return IRQ_HANDLED;
726 }
727
728real_rx:
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800729 bfin_mac_rx(dev);
Bryan Wue190d6b2007-07-17 14:43:44 +0800730 number++;
731 goto get_one_packet;
732}
733
734#ifdef CONFIG_NET_POLL_CONTROLLER
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800735static void bfin_mac_poll(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800736{
737 disable_irq(IRQ_MAC_RX);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800738 bfin_mac_interrupt(IRQ_MAC_RX, dev);
Bryan Wue190d6b2007-07-17 14:43:44 +0800739 enable_irq(IRQ_MAC_RX);
740}
741#endif /* CONFIG_NET_POLL_CONTROLLER */
742
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800743static void bfin_mac_disable(void)
Bryan Wue190d6b2007-07-17 14:43:44 +0800744{
745 unsigned int opmode;
746
747 opmode = bfin_read_EMAC_OPMODE();
748 opmode &= (~RE);
749 opmode &= (~TE);
750 /* Turn off the EMAC */
751 bfin_write_EMAC_OPMODE(opmode);
752}
753
754/*
755 * Enable Interrupts, Receive, and Transmit
756 */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800757static void bfin_mac_enable(void)
Bryan Wue190d6b2007-07-17 14:43:44 +0800758{
759 u32 opmode;
760
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700761 pr_debug("%s: %s\n", DRV_NAME, __func__);
Bryan Wue190d6b2007-07-17 14:43:44 +0800762
763 /* Set RX DMA */
764 bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a));
765 bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config);
766
767 /* Wait MII done */
Adrian Bunk0ed0563e2008-10-12 21:15:17 -0700768 bfin_mdio_poll();
Bryan Wue190d6b2007-07-17 14:43:44 +0800769
770 /* We enable only RX here */
771 /* ASTP : Enable Automatic Pad Stripping
772 PR : Promiscuous Mode for test
773 PSF : Receive frames with total length less than 64 bytes.
774 FDMODE : Full Duplex Mode
775 LB : Internal Loopback for test
776 RE : Receiver Enable */
777 opmode = bfin_read_EMAC_OPMODE();
778 if (opmode & FDMODE)
779 opmode |= PSF;
780 else
781 opmode |= DRO | DC | PSF;
782 opmode |= RE;
783
784#if defined(CONFIG_BFIN_MAC_RMII)
785 opmode |= RMII; /* For Now only 100MBit are supported */
Michael Hennerich6893ff12008-01-30 16:52:25 +0800786#if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2
Bryan Wue190d6b2007-07-17 14:43:44 +0800787 opmode |= TE;
788#endif
789#endif
790 /* Turn on the EMAC rx */
791 bfin_write_EMAC_OPMODE(opmode);
Bryan Wue190d6b2007-07-17 14:43:44 +0800792}
793
794/* Our watchdog timed out. Called by the networking layer */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800795static void bfin_mac_timeout(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800796{
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700797 pr_debug("%s: %s\n", dev->name, __func__);
Bryan Wue190d6b2007-07-17 14:43:44 +0800798
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800799 bfin_mac_disable();
Bryan Wue190d6b2007-07-17 14:43:44 +0800800
801 /* reset tx queue */
802 tx_list_tail = tx_list_head->next;
803
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800804 bfin_mac_enable();
Bryan Wue190d6b2007-07-17 14:43:44 +0800805
806 /* We can accept TX packets again */
807 dev->trans_start = jiffies;
808 netif_wake_queue(dev);
809}
810
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800811static void bfin_mac_multicast_hash(struct net_device *dev)
Aidan Williams775919b2008-01-30 16:52:23 +0800812{
813 u32 emac_hashhi, emac_hashlo;
814 struct dev_mc_list *dmi = dev->mc_list;
815 char *addrs;
816 int i;
817 u32 crc;
818
819 emac_hashhi = emac_hashlo = 0;
820
821 for (i = 0; i < dev->mc_count; i++) {
822 addrs = dmi->dmi_addr;
823 dmi = dmi->next;
824
825 /* skip non-multicast addresses */
826 if (!(*addrs & 1))
827 continue;
828
829 crc = ether_crc(ETH_ALEN, addrs);
830 crc >>= 26;
831
832 if (crc & 0x20)
833 emac_hashhi |= 1 << (crc & 0x1f);
834 else
835 emac_hashlo |= 1 << (crc & 0x1f);
836 }
837
838 bfin_write_EMAC_HASHHI(emac_hashhi);
839 bfin_write_EMAC_HASHLO(emac_hashlo);
840
841 return;
842}
843
Bryan Wue190d6b2007-07-17 14:43:44 +0800844/*
Bryan Wue190d6b2007-07-17 14:43:44 +0800845 * This routine will, depending on the values passed to it,
846 * either make it accept multicast packets, go into
847 * promiscuous mode (for TCPDUMP and cousins) or accept
848 * a select set of multicast packets
849 */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800850static void bfin_mac_set_multicast_list(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800851{
852 u32 sysctl;
853
854 if (dev->flags & IFF_PROMISC) {
855 printk(KERN_INFO "%s: set to promisc mode\n", dev->name);
856 sysctl = bfin_read_EMAC_OPMODE();
857 sysctl |= RAF;
858 bfin_write_EMAC_OPMODE(sysctl);
Aidan Williams775919b2008-01-30 16:52:23 +0800859 } else if (dev->flags & IFF_ALLMULTI) {
Bryan Wue190d6b2007-07-17 14:43:44 +0800860 /* accept all multicast */
861 sysctl = bfin_read_EMAC_OPMODE();
862 sysctl |= PAM;
863 bfin_write_EMAC_OPMODE(sysctl);
Aidan Williams775919b2008-01-30 16:52:23 +0800864 } else if (dev->mc_count) {
865 /* set up multicast hash table */
866 sysctl = bfin_read_EMAC_OPMODE();
867 sysctl |= HM;
868 bfin_write_EMAC_OPMODE(sysctl);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800869 bfin_mac_multicast_hash(dev);
Bryan Wue190d6b2007-07-17 14:43:44 +0800870 } else {
871 /* clear promisc or multicast mode */
872 sysctl = bfin_read_EMAC_OPMODE();
873 sysctl &= ~(RAF | PAM);
874 bfin_write_EMAC_OPMODE(sysctl);
875 }
876}
877
878/*
879 * this puts the device in an inactive state
880 */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800881static void bfin_mac_shutdown(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800882{
883 /* Turn off the EMAC */
884 bfin_write_EMAC_OPMODE(0x00000000);
885 /* Turn off the EMAC RX DMA */
886 bfin_write_DMA1_CONFIG(0x0000);
887 bfin_write_DMA2_CONFIG(0x0000);
888}
889
890/*
891 * Open and Initialize the interface
892 *
893 * Set up everything, reset the card, etc..
894 */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800895static int bfin_mac_open(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800896{
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800897 struct bfin_mac_local *lp = netdev_priv(dev);
Michael Hennerich4af4b842007-07-25 14:09:54 +0800898 int retval;
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700899 pr_debug("%s: %s\n", dev->name, __func__);
Bryan Wue190d6b2007-07-17 14:43:44 +0800900
901 /*
902 * Check that the address is valid. If its not, refuse
903 * to bring the device up. The user must specify an
904 * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
905 */
906 if (!is_valid_ether_addr(dev->dev_addr)) {
907 printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n");
908 return -EINVAL;
909 }
910
911 /* initial rx and tx list */
Michael Hennerich4af4b842007-07-25 14:09:54 +0800912 retval = desc_list_init();
913
914 if (retval)
915 return retval;
Bryan Wue190d6b2007-07-17 14:43:44 +0800916
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800917 phy_start(lp->phydev);
Vitja Makarov136492b2008-01-30 16:52:26 +0800918 phy_write(lp->phydev, MII_BMCR, BMCR_RESET);
Bryan Wue190d6b2007-07-17 14:43:44 +0800919 setup_system_regs(dev);
Michael Hennerichee02fee2008-07-27 22:45:05 +0800920 setup_mac_addr(dev->dev_addr);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800921 bfin_mac_disable();
922 bfin_mac_enable();
Bryan Wue190d6b2007-07-17 14:43:44 +0800923 pr_debug("hardware init finished\n");
924 netif_start_queue(dev);
925 netif_carrier_on(dev);
926
927 return 0;
928}
929
930/*
Bryan Wue190d6b2007-07-17 14:43:44 +0800931 * this makes the board clean up everything that it can
932 * and not talk to the outside world. Caused by
933 * an 'ifconfig ethX down'
934 */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800935static int bfin_mac_close(struct net_device *dev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800936{
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800937 struct bfin_mac_local *lp = netdev_priv(dev);
Harvey Harrisonb39d66a2008-08-20 16:52:04 -0700938 pr_debug("%s: %s\n", dev->name, __func__);
Bryan Wue190d6b2007-07-17 14:43:44 +0800939
940 netif_stop_queue(dev);
941 netif_carrier_off(dev);
942
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800943 phy_stop(lp->phydev);
Vitja Makarov136492b2008-01-30 16:52:26 +0800944 phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN);
Bryan Wu4ae5a3a2007-09-19 23:37:36 +0800945
Bryan Wue190d6b2007-07-17 14:43:44 +0800946 /* clear everything */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800947 bfin_mac_shutdown(dev);
Bryan Wue190d6b2007-07-17 14:43:44 +0800948
949 /* free the rx/tx buffers */
950 desc_list_free();
951
952 return 0;
953}
954
Mike Frysingerb63dc8f2009-05-26 20:55:33 -0700955static const struct net_device_ops bfin_mac_netdev_ops = {
956 .ndo_open = bfin_mac_open,
957 .ndo_stop = bfin_mac_close,
958 .ndo_start_xmit = bfin_mac_hard_start_xmit,
959 .ndo_set_mac_address = bfin_mac_set_mac_address,
960 .ndo_tx_timeout = bfin_mac_timeout,
961 .ndo_set_multicast_list = bfin_mac_set_multicast_list,
962 .ndo_validate_addr = eth_validate_addr,
963 .ndo_change_mtu = eth_change_mtu,
964#ifdef CONFIG_NET_POLL_CONTROLLER
965 .ndo_poll_controller = bfin_mac_poll,
966#endif
967};
968
Mike Frysingerd7b843d32008-07-27 22:45:03 +0800969static int __devinit bfin_mac_probe(struct platform_device *pdev)
Bryan Wue190d6b2007-07-17 14:43:44 +0800970{
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800971 struct net_device *ndev;
972 struct bfin_mac_local *lp;
Graf Yang080c8252009-05-29 03:41:48 +0000973 struct platform_device *pd;
974 int rc;
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800975
976 ndev = alloc_etherdev(sizeof(struct bfin_mac_local));
977 if (!ndev) {
978 dev_err(&pdev->dev, "Cannot allocate net device!\n");
979 return -ENOMEM;
980 }
981
982 SET_NETDEV_DEV(ndev, &pdev->dev);
983 platform_set_drvdata(pdev, ndev);
984 lp = netdev_priv(ndev);
Bryan Wue190d6b2007-07-17 14:43:44 +0800985
986 /* Grab the MAC address in the MAC */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800987 *(__le32 *) (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
988 *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI());
Bryan Wue190d6b2007-07-17 14:43:44 +0800989
990 /* probe mac */
991 /*todo: how to proble? which is revision_register */
992 bfin_write_EMAC_ADDRLO(0x12345678);
993 if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
Bryan Wu7ef0a7e2008-04-25 11:53:10 +0800994 dev_err(&pdev->dev, "Cannot detect Blackfin on-chip ethernet MAC controller!\n");
995 rc = -ENODEV;
996 goto out_err_probe_mac;
Bryan Wue190d6b2007-07-17 14:43:44 +0800997 }
998
Bryan Wue190d6b2007-07-17 14:43:44 +0800999
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001000 /*
1001 * Is it valid? (Did bootloader initialize it?)
1002 * Grab the MAC from the board somehow
1003 * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c
1004 */
1005 if (!is_valid_ether_addr(ndev->dev_addr))
1006 bfin_get_ether_addr(ndev->dev_addr);
1007
Bryan Wue190d6b2007-07-17 14:43:44 +08001008 /* If still not valid, get a random one */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001009 if (!is_valid_ether_addr(ndev->dev_addr))
1010 random_ether_addr(ndev->dev_addr);
Bryan Wue190d6b2007-07-17 14:43:44 +08001011
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001012 setup_mac_addr(ndev->dev_addr);
Bryan Wue190d6b2007-07-17 14:43:44 +08001013
Graf Yang080c8252009-05-29 03:41:48 +00001014 if (!pdev->dev.platform_data) {
1015 dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n");
1016 rc = -ENODEV;
1017 goto out_err_probe_mac;
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001018 }
Graf Yang080c8252009-05-29 03:41:48 +00001019 pd = pdev->dev.platform_data;
1020 lp->mii_bus = platform_get_drvdata(pd);
1021 lp->mii_bus->priv = ndev;
Bryan Wu4ae5a3a2007-09-19 23:37:36 +08001022
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001023 rc = mii_probe(ndev);
1024 if (rc) {
1025 dev_err(&pdev->dev, "MII Probe failed!\n");
1026 goto out_err_mii_probe;
1027 }
Bryan Wu4ae5a3a2007-09-19 23:37:36 +08001028
Bryan Wue190d6b2007-07-17 14:43:44 +08001029 /* Fill in the fields of the device structure with ethernet values. */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001030 ether_setup(ndev);
Bryan Wue190d6b2007-07-17 14:43:44 +08001031
Alexander Beregalov149da652009-04-14 18:30:24 +00001032 ndev->netdev_ops = &bfin_mac_netdev_ops;
Bryan Wu679dce32008-04-25 11:53:11 +08001033 ndev->ethtool_ops = &bfin_mac_ethtool_ops;
Bryan Wue190d6b2007-07-17 14:43:44 +08001034
Bryan Wue190d6b2007-07-17 14:43:44 +08001035 spin_lock_init(&lp->lock);
1036
1037 /* now, enable interrupts */
1038 /* register irq handler */
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001039 rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt,
Michael Hennerich91a455f2009-05-29 03:39:45 +00001040 IRQF_DISABLED, "EMAC_RX", ndev);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001041 if (rc) {
1042 dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n");
1043 rc = -EBUSY;
1044 goto out_err_request_irq;
Bryan Wue190d6b2007-07-17 14:43:44 +08001045 }
1046
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001047 rc = register_netdev(ndev);
1048 if (rc) {
1049 dev_err(&pdev->dev, "Cannot register net device!\n");
1050 goto out_err_reg_ndev;
Bryan Wue190d6b2007-07-17 14:43:44 +08001051 }
1052
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001053 /* now, print out the card info, in a short format.. */
1054 dev_info(&pdev->dev, "%s, Version %s\n", DRV_DESC, DRV_VERSION);
Bryan Wue190d6b2007-07-17 14:43:44 +08001055
1056 return 0;
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001057
1058out_err_reg_ndev:
1059 free_irq(IRQ_MAC_RX, ndev);
1060out_err_request_irq:
1061out_err_mii_probe:
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07001062 mdiobus_unregister(lp->mii_bus);
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07001063 mdiobus_free(lp->mii_bus);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001064 peripheral_free_list(pin_req);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001065out_err_probe_mac:
1066 platform_set_drvdata(pdev, NULL);
1067 free_netdev(ndev);
1068
1069 return rc;
Bryan Wue190d6b2007-07-17 14:43:44 +08001070}
1071
Mike Frysingerd7b843d32008-07-27 22:45:03 +08001072static int __devexit bfin_mac_remove(struct platform_device *pdev)
Bryan Wue190d6b2007-07-17 14:43:44 +08001073{
1074 struct net_device *ndev = platform_get_drvdata(pdev);
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001075 struct bfin_mac_local *lp = netdev_priv(ndev);
Bryan Wue190d6b2007-07-17 14:43:44 +08001076
1077 platform_set_drvdata(pdev, NULL);
1078
Graf Yang080c8252009-05-29 03:41:48 +00001079 lp->mii_bus->priv = NULL;
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001080
Bryan Wue190d6b2007-07-17 14:43:44 +08001081 unregister_netdev(ndev);
1082
1083 free_irq(IRQ_MAC_RX, ndev);
1084
1085 free_netdev(ndev);
1086
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001087 peripheral_free_list(pin_req);
Bryan Wue190d6b2007-07-17 14:43:44 +08001088
1089 return 0;
1090}
1091
Bryan Wu496a34c2007-09-19 23:37:14 +08001092#ifdef CONFIG_PM
1093static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg)
Bryan Wue190d6b2007-07-17 14:43:44 +08001094{
Bryan Wu496a34c2007-09-19 23:37:14 +08001095 struct net_device *net_dev = platform_get_drvdata(pdev);
1096
1097 if (netif_running(net_dev))
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001098 bfin_mac_close(net_dev);
Bryan Wu496a34c2007-09-19 23:37:14 +08001099
Bryan Wue190d6b2007-07-17 14:43:44 +08001100 return 0;
1101}
1102
1103static int bfin_mac_resume(struct platform_device *pdev)
1104{
Bryan Wu496a34c2007-09-19 23:37:14 +08001105 struct net_device *net_dev = platform_get_drvdata(pdev);
1106
1107 if (netif_running(net_dev))
Bryan Wu7ef0a7e2008-04-25 11:53:10 +08001108 bfin_mac_open(net_dev);
Bryan Wu496a34c2007-09-19 23:37:14 +08001109
Bryan Wue190d6b2007-07-17 14:43:44 +08001110 return 0;
1111}
Bryan Wu496a34c2007-09-19 23:37:14 +08001112#else
1113#define bfin_mac_suspend NULL
1114#define bfin_mac_resume NULL
1115#endif /* CONFIG_PM */
Bryan Wue190d6b2007-07-17 14:43:44 +08001116
Graf Yang080c8252009-05-29 03:41:48 +00001117static int __devinit bfin_mii_bus_probe(struct platform_device *pdev)
1118{
1119 struct mii_bus *miibus;
1120 int rc, i;
1121
1122 /*
1123 * We are setting up a network card,
1124 * so set the GPIO pins to Ethernet mode
1125 */
1126 rc = peripheral_request_list(pin_req, DRV_NAME);
1127 if (rc) {
1128 dev_err(&pdev->dev, "Requesting peripherals failed!\n");
1129 return rc;
1130 }
1131
1132 rc = -ENOMEM;
1133 miibus = mdiobus_alloc();
1134 if (miibus == NULL)
1135 goto out_err_alloc;
1136 miibus->read = bfin_mdiobus_read;
1137 miibus->write = bfin_mdiobus_write;
1138 miibus->reset = bfin_mdiobus_reset;
1139
1140 miibus->parent = &pdev->dev;
1141 miibus->name = "bfin_mii_bus";
1142 snprintf(miibus->id, MII_BUS_ID_SIZE, "0");
1143 miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
1144 if (miibus->irq == NULL)
1145 goto out_err_alloc;
1146 for (i = 0; i < PHY_MAX_ADDR; ++i)
1147 miibus->irq[i] = PHY_POLL;
1148
1149 rc = mdiobus_register(miibus);
1150 if (rc) {
1151 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
1152 goto out_err_mdiobus_register;
1153 }
1154
1155 platform_set_drvdata(pdev, miibus);
1156 return 0;
1157
1158out_err_mdiobus_register:
1159 mdiobus_free(miibus);
1160out_err_alloc:
1161 peripheral_free_list(pin_req);
1162
1163 return rc;
1164}
1165
1166static int __devexit bfin_mii_bus_remove(struct platform_device *pdev)
1167{
1168 struct mii_bus *miibus = platform_get_drvdata(pdev);
1169 platform_set_drvdata(pdev, NULL);
1170 mdiobus_unregister(miibus);
1171 mdiobus_free(miibus);
1172 peripheral_free_list(pin_req);
1173 return 0;
1174}
1175
1176static struct platform_driver bfin_mii_bus_driver = {
1177 .probe = bfin_mii_bus_probe,
1178 .remove = __devexit_p(bfin_mii_bus_remove),
1179 .driver = {
1180 .name = "bfin_mii_bus",
1181 .owner = THIS_MODULE,
1182 },
1183};
1184
Bryan Wue190d6b2007-07-17 14:43:44 +08001185static struct platform_driver bfin_mac_driver = {
1186 .probe = bfin_mac_probe,
Mike Frysingerd7b843d32008-07-27 22:45:03 +08001187 .remove = __devexit_p(bfin_mac_remove),
Bryan Wue190d6b2007-07-17 14:43:44 +08001188 .resume = bfin_mac_resume,
1189 .suspend = bfin_mac_suspend,
1190 .driver = {
Kay Sievers72abb462008-04-18 13:50:44 -07001191 .name = DRV_NAME,
1192 .owner = THIS_MODULE,
1193 },
Bryan Wue190d6b2007-07-17 14:43:44 +08001194};
1195
1196static int __init bfin_mac_init(void)
1197{
Graf Yang080c8252009-05-29 03:41:48 +00001198 int ret;
1199 ret = platform_driver_register(&bfin_mii_bus_driver);
1200 if (!ret)
1201 return platform_driver_register(&bfin_mac_driver);
1202 return -ENODEV;
Bryan Wue190d6b2007-07-17 14:43:44 +08001203}
1204
1205module_init(bfin_mac_init);
1206
1207static void __exit bfin_mac_cleanup(void)
1208{
1209 platform_driver_unregister(&bfin_mac_driver);
Graf Yang080c8252009-05-29 03:41:48 +00001210 platform_driver_unregister(&bfin_mii_bus_driver);
Bryan Wue190d6b2007-07-17 14:43:44 +08001211}
1212
1213module_exit(bfin_mac_cleanup);
Kay Sievers72abb462008-04-18 13:50:44 -07001214