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authorKrzysztof Halasa <khc@pm.waw.pl>2008-04-20 13:06:39 -0400
committerJeff Garzik <jgarzik@redhat.com>2008-04-29 01:56:50 -0400
commitdac2f83fce01f0c2900918a4a8abd4c652151804 (patch)
tree1ff0775cc0d07fa382cfe54cb233729e12b9e576 /drivers
parent770f867991155f9c9e36a845a142f770d55ee67c (diff)
Driver for IXP4xx built-in Ethernet ports
Adds a driver for built-in IXP4xx Ethernet ports. Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/arm/Kconfig8
-rw-r--r--drivers/net/arm/Makefile1
-rw-r--r--drivers/net/arm/ixp4xx_eth.c1265
3 files changed, 1274 insertions, 0 deletions
diff --git a/drivers/net/arm/Kconfig b/drivers/net/arm/Kconfig
index f9cc2b621fe2..8eda6eeb43b7 100644
--- a/drivers/net/arm/Kconfig
+++ b/drivers/net/arm/Kconfig
@@ -47,3 +47,11 @@ config EP93XX_ETH
47 help 47 help
48 This is a driver for the ethernet hardware included in EP93xx CPUs. 48 This is a driver for the ethernet hardware included in EP93xx CPUs.
49 Say Y if you are building a kernel for EP93xx based devices. 49 Say Y if you are building a kernel for EP93xx based devices.
50
51config IXP4XX_ETH
52 tristate "Intel IXP4xx Ethernet support"
53 depends on ARM && ARCH_IXP4XX && IXP4XX_NPE && IXP4XX_QMGR
54 select MII
55 help
56 Say Y here if you want to use built-in Ethernet ports
57 on IXP4xx processor.
diff --git a/drivers/net/arm/Makefile b/drivers/net/arm/Makefile
index a4c868278e11..7c812ac2b6a5 100644
--- a/drivers/net/arm/Makefile
+++ b/drivers/net/arm/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_ARM_ETHER3) += ether3.o
9obj-$(CONFIG_ARM_ETHER1) += ether1.o 9obj-$(CONFIG_ARM_ETHER1) += ether1.o
10obj-$(CONFIG_ARM_AT91_ETHER) += at91_ether.o 10obj-$(CONFIG_ARM_AT91_ETHER) += at91_ether.o
11obj-$(CONFIG_EP93XX_ETH) += ep93xx_eth.o 11obj-$(CONFIG_EP93XX_ETH) += ep93xx_eth.o
12obj-$(CONFIG_IXP4XX_ETH) += ixp4xx_eth.o
diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
new file mode 100644
index 000000000000..c617b64c288e
--- /dev/null
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -0,0 +1,1265 @@
1/*
2 * Intel IXP4xx Ethernet driver for Linux
3 *
4 * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License
8 * as published by the Free Software Foundation.
9 *
10 * Ethernet port config (0x00 is not present on IXP42X):
11 *
12 * logical port 0x00 0x10 0x20
13 * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
14 * physical PortId 2 0 1
15 * TX queue 23 24 25
16 * RX-free queue 26 27 28
17 * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
18 *
19 *
20 * Queue entries:
21 * bits 0 -> 1 - NPE ID (RX and TX-done)
22 * bits 0 -> 2 - priority (TX, per 802.1D)
23 * bits 3 -> 4 - port ID (user-set?)
24 * bits 5 -> 31 - physical descriptor address
25 */
26
27#include <linux/delay.h>
28#include <linux/dma-mapping.h>
29#include <linux/dmapool.h>
30#include <linux/etherdevice.h>
31#include <linux/io.h>
32#include <linux/kernel.h>
33#include <linux/mii.h>
34#include <linux/platform_device.h>
35#include <asm/arch/npe.h>
36#include <asm/arch/qmgr.h>
37
38#define DEBUG_QUEUES 0
39#define DEBUG_DESC 0
40#define DEBUG_RX 0
41#define DEBUG_TX 0
42#define DEBUG_PKT_BYTES 0
43#define DEBUG_MDIO 0
44#define DEBUG_CLOSE 0
45
46#define DRV_NAME "ixp4xx_eth"
47
48#define MAX_NPES 3
49
50#define RX_DESCS 64 /* also length of all RX queues */
51#define TX_DESCS 16 /* also length of all TX queues */
52#define TXDONE_QUEUE_LEN 64 /* dwords */
53
54#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
55#define REGS_SIZE 0x1000
56#define MAX_MRU 1536 /* 0x600 */
57#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
58
59#define NAPI_WEIGHT 16
60#define MDIO_INTERVAL (3 * HZ)
61#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
62#define MAX_MII_RESET_RETRIES 100 /* mdio_read() cycles, typically 4 */
63#define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
64
65#define NPE_ID(port_id) ((port_id) >> 4)
66#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
67#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
68#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
69#define TXDONE_QUEUE 31
70
71/* TX Control Registers */
72#define TX_CNTRL0_TX_EN 0x01
73#define TX_CNTRL0_HALFDUPLEX 0x02
74#define TX_CNTRL0_RETRY 0x04
75#define TX_CNTRL0_PAD_EN 0x08
76#define TX_CNTRL0_APPEND_FCS 0x10
77#define TX_CNTRL0_2DEFER 0x20
78#define TX_CNTRL0_RMII 0x40 /* reduced MII */
79#define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
80
81/* RX Control Registers */
82#define RX_CNTRL0_RX_EN 0x01
83#define RX_CNTRL0_PADSTRIP_EN 0x02
84#define RX_CNTRL0_SEND_FCS 0x04
85#define RX_CNTRL0_PAUSE_EN 0x08
86#define RX_CNTRL0_LOOP_EN 0x10
87#define RX_CNTRL0_ADDR_FLTR_EN 0x20
88#define RX_CNTRL0_RX_RUNT_EN 0x40
89#define RX_CNTRL0_BCAST_DIS 0x80
90#define RX_CNTRL1_DEFER_EN 0x01
91
92/* Core Control Register */
93#define CORE_RESET 0x01
94#define CORE_RX_FIFO_FLUSH 0x02
95#define CORE_TX_FIFO_FLUSH 0x04
96#define CORE_SEND_JAM 0x08
97#define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */
98
99#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
100 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
101 TX_CNTRL0_2DEFER)
102#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
103#define DEFAULT_CORE_CNTRL CORE_MDC_EN
104
105
106/* NPE message codes */
107#define NPE_GETSTATUS 0x00
108#define NPE_EDB_SETPORTADDRESS 0x01
109#define NPE_EDB_GETMACADDRESSDATABASE 0x02
110#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
111#define NPE_GETSTATS 0x04
112#define NPE_RESETSTATS 0x05
113#define NPE_SETMAXFRAMELENGTHS 0x06
114#define NPE_VLAN_SETRXTAGMODE 0x07
115#define NPE_VLAN_SETDEFAULTRXVID 0x08
116#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
117#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
118#define NPE_VLAN_SETRXQOSENTRY 0x0B
119#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
120#define NPE_STP_SETBLOCKINGSTATE 0x0D
121#define NPE_FW_SETFIREWALLMODE 0x0E
122#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
123#define NPE_PC_SETAPMACTABLE 0x11
124#define NPE_SETLOOPBACK_MODE 0x12
125#define NPE_PC_SETBSSIDTABLE 0x13
126#define NPE_ADDRESS_FILTER_CONFIG 0x14
127#define NPE_APPENDFCSCONFIG 0x15
128#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
129#define NPE_MAC_RECOVERY_START 0x17
130
131
132#ifdef __ARMEB__
133typedef struct sk_buff buffer_t;
134#define free_buffer dev_kfree_skb
135#define free_buffer_irq dev_kfree_skb_irq
136#else
137typedef void buffer_t;
138#define free_buffer kfree
139#define free_buffer_irq kfree
140#endif
141
142struct eth_regs {
143 u32 tx_control[2], __res1[2]; /* 000 */
144 u32 rx_control[2], __res2[2]; /* 010 */
145 u32 random_seed, __res3[3]; /* 020 */
146 u32 partial_empty_threshold, __res4; /* 030 */
147 u32 partial_full_threshold, __res5; /* 038 */
148 u32 tx_start_bytes, __res6[3]; /* 040 */
149 u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
150 u32 tx_2part_deferral[2], __res8[2]; /* 060 */
151 u32 slot_time, __res9[3]; /* 070 */
152 u32 mdio_command[4]; /* 080 */
153 u32 mdio_status[4]; /* 090 */
154 u32 mcast_mask[6], __res10[2]; /* 0A0 */
155 u32 mcast_addr[6], __res11[2]; /* 0C0 */
156 u32 int_clock_threshold, __res12[3]; /* 0E0 */
157 u32 hw_addr[6], __res13[61]; /* 0F0 */
158 u32 core_control; /* 1FC */
159};
160
161struct port {
162 struct resource *mem_res;
163 struct eth_regs __iomem *regs;
164 struct npe *npe;
165 struct net_device *netdev;
166 struct napi_struct napi;
167 struct net_device_stats stat;
168 struct mii_if_info mii;
169 struct delayed_work mdio_thread;
170 struct eth_plat_info *plat;
171 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
172 struct desc *desc_tab; /* coherent */
173 u32 desc_tab_phys;
174 int id; /* logical port ID */
175 u16 mii_bmcr;
176};
177
178/* NPE message structure */
179struct msg {
180#ifdef __ARMEB__
181 u8 cmd, eth_id, byte2, byte3;
182 u8 byte4, byte5, byte6, byte7;
183#else
184 u8 byte3, byte2, eth_id, cmd;
185 u8 byte7, byte6, byte5, byte4;
186#endif
187};
188
189/* Ethernet packet descriptor */
190struct desc {
191 u32 next; /* pointer to next buffer, unused */
192
193#ifdef __ARMEB__
194 u16 buf_len; /* buffer length */
195 u16 pkt_len; /* packet length */
196 u32 data; /* pointer to data buffer in RAM */
197 u8 dest_id;
198 u8 src_id;
199 u16 flags;
200 u8 qos;
201 u8 padlen;
202 u16 vlan_tci;
203#else
204 u16 pkt_len; /* packet length */
205 u16 buf_len; /* buffer length */
206 u32 data; /* pointer to data buffer in RAM */
207 u16 flags;
208 u8 src_id;
209 u8 dest_id;
210 u16 vlan_tci;
211 u8 padlen;
212 u8 qos;
213#endif
214
215#ifdef __ARMEB__
216 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
217 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
218 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
219#else
220 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
221 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
222 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
223#endif
224};
225
226
227#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
228 (n) * sizeof(struct desc))
229#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
230
231#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
232 ((n) + RX_DESCS) * sizeof(struct desc))
233#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
234
235#ifndef __ARMEB__
236static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
237{
238 int i;
239 for (i = 0; i < cnt; i++)
240 dest[i] = swab32(src[i]);
241}
242#endif
243
244static spinlock_t mdio_lock;
245static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
246static int ports_open;
247static struct port *npe_port_tab[MAX_NPES];
248static struct dma_pool *dma_pool;
249
250
251static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
252 int write, u16 cmd)
253{
254 int cycles = 0;
255
256 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
257 printk(KERN_ERR "%s: MII not ready to transmit\n", dev->name);
258 return 0;
259 }
260
261 if (write) {
262 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
263 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
264 }
265 __raw_writel(((phy_id << 5) | location) & 0xFF,
266 &mdio_regs->mdio_command[2]);
267 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
268 &mdio_regs->mdio_command[3]);
269
270 while ((cycles < MAX_MDIO_RETRIES) &&
271 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
272 udelay(1);
273 cycles++;
274 }
275
276 if (cycles == MAX_MDIO_RETRIES) {
277 printk(KERN_ERR "%s: MII write failed\n", dev->name);
278 return 0;
279 }
280
281#if DEBUG_MDIO
282 printk(KERN_DEBUG "%s: mdio_cmd() took %i cycles\n", dev->name,
283 cycles);
284#endif
285
286 if (write)
287 return 0;
288
289 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
290 printk(KERN_ERR "%s: MII read failed\n", dev->name);
291 return 0;
292 }
293
294 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
295 (__raw_readl(&mdio_regs->mdio_status[1]) << 8);
296}
297
298static int mdio_read(struct net_device *dev, int phy_id, int location)
299{
300 unsigned long flags;
301 u16 val;
302
303 spin_lock_irqsave(&mdio_lock, flags);
304 val = mdio_cmd(dev, phy_id, location, 0, 0);
305 spin_unlock_irqrestore(&mdio_lock, flags);
306 return val;
307}
308
309static void mdio_write(struct net_device *dev, int phy_id, int location,
310 int val)
311{
312 unsigned long flags;
313
314 spin_lock_irqsave(&mdio_lock, flags);
315 mdio_cmd(dev, phy_id, location, 1, val);
316 spin_unlock_irqrestore(&mdio_lock, flags);
317}
318
319static void phy_reset(struct net_device *dev, int phy_id)
320{
321 struct port *port = netdev_priv(dev);
322 int cycles = 0;
323
324 mdio_write(dev, phy_id, MII_BMCR, port->mii_bmcr | BMCR_RESET);
325
326 while (cycles < MAX_MII_RESET_RETRIES) {
327 if (!(mdio_read(dev, phy_id, MII_BMCR) & BMCR_RESET)) {
328#if DEBUG_MDIO
329 printk(KERN_DEBUG "%s: phy_reset() took %i cycles\n",
330 dev->name, cycles);
331#endif
332 return;
333 }
334 udelay(1);
335 cycles++;
336 }
337
338 printk(KERN_ERR "%s: MII reset failed\n", dev->name);
339}
340
341static void eth_set_duplex(struct port *port)
342{
343 if (port->mii.full_duplex)
344 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
345 &port->regs->tx_control[0]);
346 else
347 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
348 &port->regs->tx_control[0]);
349}
350
351
352static void phy_check_media(struct port *port, int init)
353{
354 if (mii_check_media(&port->mii, 1, init))
355 eth_set_duplex(port);
356 if (port->mii.force_media) { /* mii_check_media() doesn't work */
357 struct net_device *dev = port->netdev;
358 int cur_link = mii_link_ok(&port->mii);
359 int prev_link = netif_carrier_ok(dev);
360
361 if (!prev_link && cur_link) {
362 printk(KERN_INFO "%s: link up\n", dev->name);
363 netif_carrier_on(dev);
364 } else if (prev_link && !cur_link) {
365 printk(KERN_INFO "%s: link down\n", dev->name);
366 netif_carrier_off(dev);
367 }
368 }
369}
370
371
372static void mdio_thread(struct work_struct *work)
373{
374 struct port *port = container_of(work, struct port, mdio_thread.work);
375
376 phy_check_media(port, 0);
377 schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
378}
379
380
381static inline void debug_pkt(struct net_device *dev, const char *func,
382 u8 *data, int len)
383{
384#if DEBUG_PKT_BYTES
385 int i;
386
387 printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
388 for (i = 0; i < len; i++) {
389 if (i >= DEBUG_PKT_BYTES)
390 break;
391 printk("%s%02X",
392 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
393 data[i]);
394 }
395 printk("\n");
396#endif
397}
398
399
400static inline void debug_desc(u32 phys, struct desc *desc)
401{
402#if DEBUG_DESC
403 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
404 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
405 phys, desc->next, desc->buf_len, desc->pkt_len,
406 desc->data, desc->dest_id, desc->src_id, desc->flags,
407 desc->qos, desc->padlen, desc->vlan_tci,
408 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
409 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
410 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
411 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
412#endif
413}
414
415static inline void debug_queue(unsigned int queue, int is_get, u32 phys)
416{
417#if DEBUG_QUEUES
418 static struct {
419 int queue;
420 char *name;
421 } names[] = {
422 { TX_QUEUE(0x10), "TX#0 " },
423 { TX_QUEUE(0x20), "TX#1 " },
424 { TX_QUEUE(0x00), "TX#2 " },
425 { RXFREE_QUEUE(0x10), "RX-free#0 " },
426 { RXFREE_QUEUE(0x20), "RX-free#1 " },
427 { RXFREE_QUEUE(0x00), "RX-free#2 " },
428 { TXDONE_QUEUE, "TX-done " },
429 };
430 int i;
431
432 for (i = 0; i < ARRAY_SIZE(names); i++)
433 if (names[i].queue == queue)
434 break;
435
436 printk(KERN_DEBUG "Queue %i %s%s %X\n", queue,
437 i < ARRAY_SIZE(names) ? names[i].name : "",
438 is_get ? "->" : "<-", phys);
439#endif
440}
441
442static inline u32 queue_get_entry(unsigned int queue)
443{
444 u32 phys = qmgr_get_entry(queue);
445 debug_queue(queue, 1, phys);
446 return phys;
447}
448
449static inline int queue_get_desc(unsigned int queue, struct port *port,
450 int is_tx)
451{
452 u32 phys, tab_phys, n_desc;
453 struct desc *tab;
454
455 if (!(phys = queue_get_entry(queue)))
456 return -1;
457
458 phys &= ~0x1F; /* mask out non-address bits */
459 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
460 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
461 n_desc = (phys - tab_phys) / sizeof(struct desc);
462 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
463 debug_desc(phys, &tab[n_desc]);
464 BUG_ON(tab[n_desc].next);
465 return n_desc;
466}
467
468static inline void queue_put_desc(unsigned int queue, u32 phys,
469 struct desc *desc)
470{
471 debug_queue(queue, 0, phys);
472 debug_desc(phys, desc);
473 BUG_ON(phys & 0x1F);
474 qmgr_put_entry(queue, phys);
475 BUG_ON(qmgr_stat_overflow(queue));
476}
477
478
479static inline void dma_unmap_tx(struct port *port, struct desc *desc)
480{
481#ifdef __ARMEB__
482 dma_unmap_single(&port->netdev->dev, desc->data,
483 desc->buf_len, DMA_TO_DEVICE);
484#else
485 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
486 ALIGN((desc->data & 3) + desc->buf_len, 4),
487 DMA_TO_DEVICE);
488#endif
489}
490
491
492static void eth_rx_irq(void *pdev)
493{
494 struct net_device *dev = pdev;
495 struct port *port = netdev_priv(dev);
496
497#if DEBUG_RX
498 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
499#endif
500 qmgr_disable_irq(port->plat->rxq);
501 netif_rx_schedule(dev, &port->napi);
502}
503
504static int eth_poll(struct napi_struct *napi, int budget)
505{
506 struct port *port = container_of(napi, struct port, napi);
507 struct net_device *dev = port->netdev;
508 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
509 int received = 0;
510
511#if DEBUG_RX
512 printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
513#endif
514
515 while (received < budget) {
516 struct sk_buff *skb;
517 struct desc *desc;
518 int n;
519#ifdef __ARMEB__
520 struct sk_buff *temp;
521 u32 phys;
522#endif
523
524 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
525 received = 0; /* No packet received */
526#if DEBUG_RX
527 printk(KERN_DEBUG "%s: eth_poll netif_rx_complete\n",
528 dev->name);
529#endif
530 netif_rx_complete(dev, napi);
531 qmgr_enable_irq(rxq);
532 if (!qmgr_stat_empty(rxq) &&
533 netif_rx_reschedule(dev, napi)) {
534#if DEBUG_RX
535 printk(KERN_DEBUG "%s: eth_poll"
536 " netif_rx_reschedule successed\n",
537 dev->name);
538#endif
539 qmgr_disable_irq(rxq);
540 continue;
541 }
542#if DEBUG_RX
543 printk(KERN_DEBUG "%s: eth_poll all done\n",
544 dev->name);
545#endif
546 return 0; /* all work done */
547 }
548
549 desc = rx_desc_ptr(port, n);
550
551#ifdef __ARMEB__
552 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
553 phys = dma_map_single(&dev->dev, skb->data,
554 RX_BUFF_SIZE, DMA_FROM_DEVICE);
555 if (dma_mapping_error(phys)) {
556 dev_kfree_skb(skb);
557 skb = NULL;
558 }
559 }
560#else
561 skb = netdev_alloc_skb(dev,
562 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
563#endif
564
565 if (!skb) {
566 port->stat.rx_dropped++;
567 /* put the desc back on RX-ready queue */
568 desc->buf_len = MAX_MRU;
569 desc->pkt_len = 0;
570 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
571 continue;
572 }
573
574 /* process received frame */
575#ifdef __ARMEB__
576 temp = skb;
577 skb = port->rx_buff_tab[n];
578 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
579 RX_BUFF_SIZE, DMA_FROM_DEVICE);
580#else
581 dma_sync_single(&dev->dev, desc->data - NET_IP_ALIGN,
582 RX_BUFF_SIZE, DMA_FROM_DEVICE);
583 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
584 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
585#endif
586 skb_reserve(skb, NET_IP_ALIGN);
587 skb_put(skb, desc->pkt_len);
588
589 debug_pkt(dev, "eth_poll", skb->data, skb->len);
590
591 skb->protocol = eth_type_trans(skb, dev);
592 dev->last_rx = jiffies;
593 port->stat.rx_packets++;
594 port->stat.rx_bytes += skb->len;
595 netif_receive_skb(skb);
596
597 /* put the new buffer on RX-free queue */
598#ifdef __ARMEB__
599 port->rx_buff_tab[n] = temp;
600 desc->data = phys + NET_IP_ALIGN;
601#endif
602 desc->buf_len = MAX_MRU;
603 desc->pkt_len = 0;
604 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
605 received++;
606 }
607
608#if DEBUG_RX
609 printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
610#endif
611 return received; /* not all work done */
612}
613
614
615static void eth_txdone_irq(void *unused)
616{
617 u32 phys;
618
619#if DEBUG_TX
620 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
621#endif
622 while ((phys = queue_get_entry(TXDONE_QUEUE)) != 0) {
623 u32 npe_id, n_desc;
624 struct port *port;
625 struct desc *desc;
626 int start;
627
628 npe_id = phys & 3;
629 BUG_ON(npe_id >= MAX_NPES);
630 port = npe_port_tab[npe_id];
631 BUG_ON(!port);
632 phys &= ~0x1F; /* mask out non-address bits */
633 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
634 BUG_ON(n_desc >= TX_DESCS);
635 desc = tx_desc_ptr(port, n_desc);
636 debug_desc(phys, desc);
637
638 if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
639 port->stat.tx_packets++;
640 port->stat.tx_bytes += desc->pkt_len;
641
642 dma_unmap_tx(port, desc);
643#if DEBUG_TX
644 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
645 port->netdev->name, port->tx_buff_tab[n_desc]);
646#endif
647 free_buffer_irq(port->tx_buff_tab[n_desc]);
648 port->tx_buff_tab[n_desc] = NULL;
649 }
650
651 start = qmgr_stat_empty(port->plat->txreadyq);
652 queue_put_desc(port->plat->txreadyq, phys, desc);
653 if (start) {
654#if DEBUG_TX
655 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
656 port->netdev->name);
657#endif
658 netif_wake_queue(port->netdev);
659 }
660 }
661}
662
663static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
664{
665 struct port *port = netdev_priv(dev);
666 unsigned int txreadyq = port->plat->txreadyq;
667 int len, offset, bytes, n;
668 void *mem;
669 u32 phys;
670 struct desc *desc;
671
672#if DEBUG_TX
673 printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
674#endif
675
676 if (unlikely(skb->len > MAX_MRU)) {
677 dev_kfree_skb(skb);
678 port->stat.tx_errors++;
679 return NETDEV_TX_OK;
680 }
681
682 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
683
684 len = skb->len;
685#ifdef __ARMEB__
686 offset = 0; /* no need to keep alignment */
687 bytes = len;
688 mem = skb->data;
689#else
690 offset = (int)skb->data & 3; /* keep 32-bit alignment */
691 bytes = ALIGN(offset + len, 4);
692 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
693 dev_kfree_skb(skb);
694 port->stat.tx_dropped++;
695 return NETDEV_TX_OK;
696 }
697 memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
698 dev_kfree_skb(skb);
699#endif
700
701 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
702 if (dma_mapping_error(phys)) {
703#ifdef __ARMEB__
704 dev_kfree_skb(skb);
705#else
706 kfree(mem);
707#endif
708 port->stat.tx_dropped++;
709 return NETDEV_TX_OK;
710 }
711
712 n = queue_get_desc(txreadyq, port, 1);
713 BUG_ON(n < 0);
714 desc = tx_desc_ptr(port, n);
715
716#ifdef __ARMEB__
717 port->tx_buff_tab[n] = skb;
718#else
719 port->tx_buff_tab[n] = mem;
720#endif
721 desc->data = phys + offset;
722 desc->buf_len = desc->pkt_len = len;
723
724 /* NPE firmware pads short frames with zeros internally */
725 wmb();
726 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
727 dev->trans_start = jiffies;
728
729 if (qmgr_stat_empty(txreadyq)) {
730#if DEBUG_TX
731 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
732#endif
733 netif_stop_queue(dev);
734 /* we could miss TX ready interrupt */
735 if (!qmgr_stat_empty(txreadyq)) {
736#if DEBUG_TX
737 printk(KERN_DEBUG "%s: eth_xmit ready again\n",
738 dev->name);
739#endif
740 netif_wake_queue(dev);
741 }
742 }
743
744#if DEBUG_TX
745 printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
746#endif
747 return NETDEV_TX_OK;
748}
749
750
751static struct net_device_stats *eth_stats(struct net_device *dev)
752{
753 struct port *port = netdev_priv(dev);
754 return &port->stat;
755}
756
757static void eth_set_mcast_list(struct net_device *dev)
758{
759 struct port *port = netdev_priv(dev);
760 struct dev_mc_list *mclist = dev->mc_list;
761 u8 diffs[ETH_ALEN], *addr;
762 int cnt = dev->mc_count, i;
763
764 if ((dev->flags & IFF_PROMISC) || !mclist || !cnt) {
765 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
766 &port->regs->rx_control[0]);
767 return;
768 }
769
770 memset(diffs, 0, ETH_ALEN);
771 addr = mclist->dmi_addr; /* first MAC address */
772
773 while (--cnt && (mclist = mclist->next))
774 for (i = 0; i < ETH_ALEN; i++)
775 diffs[i] |= addr[i] ^ mclist->dmi_addr[i];
776
777 for (i = 0; i < ETH_ALEN; i++) {
778 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
779 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
780 }
781
782 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
783 &port->regs->rx_control[0]);
784}
785
786
787static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
788{
789 struct port *port = netdev_priv(dev);
790 unsigned int duplex_chg;
791 int err;
792
793 if (!netif_running(dev))
794 return -EINVAL;
795 err = generic_mii_ioctl(&port->mii, if_mii(req), cmd, &duplex_chg);
796 if (duplex_chg)
797 eth_set_duplex(port);
798 return err;
799}
800
801
802static int request_queues(struct port *port)
803{
804 int err;
805
806 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0);
807 if (err)
808 return err;
809
810 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0);
811 if (err)
812 goto rel_rxfree;
813
814 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0);
815 if (err)
816 goto rel_rx;
817
818 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0);
819 if (err)
820 goto rel_tx;
821
822 /* TX-done queue handles skbs sent out by the NPEs */
823 if (!ports_open) {
824 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0);
825 if (err)
826 goto rel_txready;
827 }
828 return 0;
829
830rel_txready:
831 qmgr_release_queue(port->plat->txreadyq);
832rel_tx:
833 qmgr_release_queue(TX_QUEUE(port->id));
834rel_rx:
835 qmgr_release_queue(port->plat->rxq);
836rel_rxfree:
837 qmgr_release_queue(RXFREE_QUEUE(port->id));
838 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
839 port->netdev->name);
840 return err;
841}
842
843static void release_queues(struct port *port)
844{
845 qmgr_release_queue(RXFREE_QUEUE(port->id));
846 qmgr_release_queue(port->plat->rxq);
847 qmgr_release_queue(TX_QUEUE(port->id));
848 qmgr_release_queue(port->plat->txreadyq);
849
850 if (!ports_open)
851 qmgr_release_queue(TXDONE_QUEUE);
852}
853
854static int init_queues(struct port *port)
855{
856 int i;
857
858 if (!ports_open)
859 if (!(dma_pool = dma_pool_create(DRV_NAME, NULL,
860 POOL_ALLOC_SIZE, 32, 0)))
861 return -ENOMEM;
862
863 if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
864 &port->desc_tab_phys)))
865 return -ENOMEM;
866 memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
867 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
868 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
869
870 /* Setup RX buffers */
871 for (i = 0; i < RX_DESCS; i++) {
872 struct desc *desc = rx_desc_ptr(port, i);
873 buffer_t *buff; /* skb or kmalloc()ated memory */
874 void *data;
875#ifdef __ARMEB__
876 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
877 return -ENOMEM;
878 data = buff->data;
879#else
880 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
881 return -ENOMEM;
882 data = buff;
883#endif
884 desc->buf_len = MAX_MRU;
885 desc->data = dma_map_single(&port->netdev->dev, data,
886 RX_BUFF_SIZE, DMA_FROM_DEVICE);
887 if (dma_mapping_error(desc->data)) {
888 free_buffer(buff);
889 return -EIO;
890 }
891 desc->data += NET_IP_ALIGN;
892 port->rx_buff_tab[i] = buff;
893 }
894
895 return 0;
896}
897
898static void destroy_queues(struct port *port)
899{
900 int i;
901
902 if (port->desc_tab) {
903 for (i = 0; i < RX_DESCS; i++) {
904 struct desc *desc = rx_desc_ptr(port, i);
905 buffer_t *buff = port->rx_buff_tab[i];
906 if (buff) {
907 dma_unmap_single(&port->netdev->dev,
908 desc->data - NET_IP_ALIGN,
909 RX_BUFF_SIZE, DMA_FROM_DEVICE);
910 free_buffer(buff);
911 }
912 }
913 for (i = 0; i < TX_DESCS; i++) {
914 struct desc *desc = tx_desc_ptr(port, i);
915 buffer_t *buff = port->tx_buff_tab[i];
916 if (buff) {
917 dma_unmap_tx(port, desc);
918 free_buffer(buff);
919 }
920 }
921 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
922 port->desc_tab = NULL;
923 }
924
925 if (!ports_open && dma_pool) {
926 dma_pool_destroy(dma_pool);
927 dma_pool = NULL;
928 }
929}
930
931static int eth_open(struct net_device *dev)
932{
933 struct port *port = netdev_priv(dev);
934 struct npe *npe = port->npe;
935 struct msg msg;
936 int i, err;
937
938 if (!npe_running(npe)) {
939 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
940 if (err)
941 return err;
942
943 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
944 printk(KERN_ERR "%s: %s not responding\n", dev->name,
945 npe_name(npe));
946 return -EIO;
947 }
948 }
949
950 mdio_write(dev, port->plat->phy, MII_BMCR, port->mii_bmcr);
951
952 memset(&msg, 0, sizeof(msg));
953 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
954 msg.eth_id = port->id;
955 msg.byte5 = port->plat->rxq | 0x80;
956 msg.byte7 = port->plat->rxq << 4;
957 for (i = 0; i < 8; i++) {
958 msg.byte3 = i;
959 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
960 return -EIO;
961 }
962
963 msg.cmd = NPE_EDB_SETPORTADDRESS;
964 msg.eth_id = PHYSICAL_ID(port->id);
965 msg.byte2 = dev->dev_addr[0];
966 msg.byte3 = dev->dev_addr[1];
967 msg.byte4 = dev->dev_addr[2];
968 msg.byte5 = dev->dev_addr[3];
969 msg.byte6 = dev->dev_addr[4];
970 msg.byte7 = dev->dev_addr[5];
971 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
972 return -EIO;
973
974 memset(&msg, 0, sizeof(msg));
975 msg.cmd = NPE_FW_SETFIREWALLMODE;
976 msg.eth_id = port->id;
977 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
978 return -EIO;
979
980 if ((err = request_queues(port)) != 0)
981 return err;
982
983 if ((err = init_queues(port)) != 0) {
984 destroy_queues(port);
985 release_queues(port);
986 return err;
987 }
988
989 for (i = 0; i < ETH_ALEN; i++)
990 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
991 __raw_writel(0x08, &port->regs->random_seed);
992 __raw_writel(0x12, &port->regs->partial_empty_threshold);
993 __raw_writel(0x30, &port->regs->partial_full_threshold);
994 __raw_writel(0x08, &port->regs->tx_start_bytes);
995 __raw_writel(0x15, &port->regs->tx_deferral);
996 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
997 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
998 __raw_writel(0x80, &port->regs->slot_time);
999 __raw_writel(0x01, &port->regs->int_clock_threshold);
1000
1001 /* Populate queues with buffers, no failure after this point */
1002 for (i = 0; i < TX_DESCS; i++)
1003 queue_put_desc(port->plat->txreadyq,
1004 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1005
1006 for (i = 0; i < RX_DESCS; i++)
1007 queue_put_desc(RXFREE_QUEUE(port->id),
1008 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1009
1010 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1011 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1012 __raw_writel(0, &port->regs->rx_control[1]);
1013 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1014
1015 napi_enable(&port->napi);
1016 phy_check_media(port, 1);
1017 eth_set_mcast_list(dev);
1018 netif_start_queue(dev);
1019 schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
1020
1021 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1022 eth_rx_irq, dev);
1023 if (!ports_open) {
1024 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1025 eth_txdone_irq, NULL);
1026 qmgr_enable_irq(TXDONE_QUEUE);
1027 }
1028 ports_open++;
1029 /* we may already have RX data, enables IRQ */
1030 netif_rx_schedule(dev, &port->napi);
1031 return 0;
1032}
1033
1034static int eth_close(struct net_device *dev)
1035{
1036 struct port *port = netdev_priv(dev);
1037 struct msg msg;
1038 int buffs = RX_DESCS; /* allocated RX buffers */
1039 int i;
1040
1041 ports_open--;
1042 qmgr_disable_irq(port->plat->rxq);
1043 napi_disable(&port->napi);
1044 netif_stop_queue(dev);
1045
1046 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1047 buffs--;
1048
1049 memset(&msg, 0, sizeof(msg));
1050 msg.cmd = NPE_SETLOOPBACK_MODE;
1051 msg.eth_id = port->id;
1052 msg.byte3 = 1;
1053 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1054 printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
1055
1056 i = 0;
1057 do { /* drain RX buffers */
1058 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1059 buffs--;
1060 if (!buffs)
1061 break;
1062 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1063 /* we have to inject some packet */
1064 struct desc *desc;
1065 u32 phys;
1066 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1067 BUG_ON(n < 0);
1068 desc = tx_desc_ptr(port, n);
1069 phys = tx_desc_phys(port, n);
1070 desc->buf_len = desc->pkt_len = 1;
1071 wmb();
1072 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1073 }
1074 udelay(1);
1075 } while (++i < MAX_CLOSE_WAIT);
1076
1077 if (buffs)
1078 printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
1079 " left in NPE\n", dev->name, buffs);
1080#if DEBUG_CLOSE
1081 if (!buffs)
1082 printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
1083#endif
1084
1085 buffs = TX_DESCS;
1086 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1087 buffs--; /* cancel TX */
1088
1089 i = 0;
1090 do {
1091 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1092 buffs--;
1093 if (!buffs)
1094 break;
1095 } while (++i < MAX_CLOSE_WAIT);
1096
1097 if (buffs)
1098 printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
1099 "left in NPE\n", dev->name, buffs);
1100#if DEBUG_CLOSE
1101 if (!buffs)
1102 printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
1103#endif
1104
1105 msg.byte3 = 0;
1106 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1107 printk(KERN_CRIT "%s: unable to disable loopback\n",
1108 dev->name);
1109
1110 port->mii_bmcr = mdio_read(dev, port->plat->phy, MII_BMCR) &
1111 ~(BMCR_RESET | BMCR_PDOWN); /* may have been altered */
1112 mdio_write(dev, port->plat->phy, MII_BMCR,
1113 port->mii_bmcr | BMCR_PDOWN);
1114
1115 if (!ports_open)
1116 qmgr_disable_irq(TXDONE_QUEUE);
1117 cancel_rearming_delayed_work(&port->mdio_thread);
1118 destroy_queues(port);
1119 release_queues(port);
1120 return 0;
1121}
1122
1123static int __devinit eth_init_one(struct platform_device *pdev)
1124{
1125 struct port *port;
1126 struct net_device *dev;
1127 struct eth_plat_info *plat = pdev->dev.platform_data;
1128 u32 regs_phys;
1129 int err;
1130
1131 if (!(dev = alloc_etherdev(sizeof(struct port))))
1132 return -ENOMEM;
1133
1134 SET_NETDEV_DEV(dev, &pdev->dev);
1135 port = netdev_priv(dev);
1136 port->netdev = dev;
1137 port->id = pdev->id;
1138
1139 switch (port->id) {
1140 case IXP4XX_ETH_NPEA:
1141 port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
1142 regs_phys = IXP4XX_EthA_BASE_PHYS;
1143 break;
1144 case IXP4XX_ETH_NPEB:
1145 port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
1146 regs_phys = IXP4XX_EthB_BASE_PHYS;
1147 break;
1148 case IXP4XX_ETH_NPEC:
1149 port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
1150 regs_phys = IXP4XX_EthC_BASE_PHYS;
1151 break;
1152 default:
1153 err = -ENOSYS;
1154 goto err_free;
1155 }
1156
1157 dev->open = eth_open;
1158 dev->hard_start_xmit = eth_xmit;
1159 dev->stop = eth_close;
1160 dev->get_stats = eth_stats;
1161 dev->do_ioctl = eth_ioctl;
1162 dev->set_multicast_list = eth_set_mcast_list;
1163 dev->tx_queue_len = 100;
1164
1165 netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
1166
1167 if (!(port->npe = npe_request(NPE_ID(port->id)))) {
1168 err = -EIO;
1169 goto err_free;
1170 }
1171
1172 if (register_netdev(dev)) {
1173 err = -EIO;
1174 goto err_npe_rel;
1175 }
1176
1177 port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
1178 if (!port->mem_res) {
1179 err = -EBUSY;
1180 goto err_unreg;
1181 }
1182
1183 port->plat = plat;
1184 npe_port_tab[NPE_ID(port->id)] = port;
1185 memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
1186
1187 platform_set_drvdata(pdev, dev);
1188
1189 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1190 &port->regs->core_control);
1191 udelay(50);
1192 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1193 udelay(50);
1194
1195 port->mii.dev = dev;
1196 port->mii.mdio_read = mdio_read;
1197 port->mii.mdio_write = mdio_write;
1198 port->mii.phy_id = plat->phy;
1199 port->mii.phy_id_mask = 0x1F;
1200 port->mii.reg_num_mask = 0x1F;
1201
1202 printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
1203 npe_name(port->npe));
1204
1205 phy_reset(dev, plat->phy);
1206 port->mii_bmcr = mdio_read(dev, plat->phy, MII_BMCR) &
1207 ~(BMCR_RESET | BMCR_PDOWN);
1208 mdio_write(dev, plat->phy, MII_BMCR, port->mii_bmcr | BMCR_PDOWN);
1209
1210 INIT_DELAYED_WORK(&port->mdio_thread, mdio_thread);
1211 return 0;
1212
1213err_unreg:
1214 unregister_netdev(dev);
1215err_npe_rel:
1216 npe_release(port->npe);
1217err_free:
1218 free_netdev(dev);
1219 return err;
1220}
1221
1222static int __devexit eth_remove_one(struct platform_device *pdev)
1223{
1224 struct net_device *dev = platform_get_drvdata(pdev);
1225 struct port *port = netdev_priv(dev);
1226
1227 unregister_netdev(dev);
1228 npe_port_tab[NPE_ID(port->id)] = NULL;
1229 platform_set_drvdata(pdev, NULL);
1230 npe_release(port->npe);
1231 release_resource(port->mem_res);
1232 free_netdev(dev);
1233 return 0;
1234}
1235
1236static struct platform_driver drv = {
1237 .driver.name = DRV_NAME,
1238 .probe = eth_init_one,
1239 .remove = eth_remove_one,
1240};
1241
1242static int __init eth_init_module(void)
1243{
1244 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
1245 return -ENOSYS;
1246
1247 /* All MII PHY accesses use NPE-B Ethernet registers */
1248 spin_lock_init(&mdio_lock);
1249 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
1250 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
1251
1252 return platform_driver_register(&drv);
1253}
1254
1255static void __exit eth_cleanup_module(void)
1256{
1257 platform_driver_unregister(&drv);
1258}
1259
1260MODULE_AUTHOR("Krzysztof Halasa");
1261MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1262MODULE_LICENSE("GPL v2");
1263MODULE_ALIAS("platform:ixp4xx_eth");
1264module_init(eth_init_module);
1265module_exit(eth_cleanup_module);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-17 15:26:58 -0500