2 * ks8842.c timberdale KS8842 ethernet driver
3 * Copyright (c) 2009 Intel Corporation
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 * The Micrel KS8842 behind the timberdale FPGA
21 * The genuine Micrel KS8841/42 device with ISA 16/32bit bus interface
24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/platform_device.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
31 #include <linux/ethtool.h>
32 #include <linux/ks8842.h>
34 #define DRV_NAME "ks8842"
36 /* Timberdale specific Registers */
37 #define REG_TIMB_RST 0x1c
38 #define REG_TIMB_FIFO 0x20
39 #define REG_TIMB_ISR 0x24
40 #define REG_TIMB_IER 0x28
41 #define REG_TIMB_IAR 0x2C
42 #define REQ_TIMB_DMA_RESUME 0x30
44 /* KS8842 registers */
46 #define REG_SELECT_BANK 0x0e
48 /* bank 0 registers */
49 #define REG_QRFCR 0x04
51 /* bank 2 registers */
56 /* bank 3 registers */
59 /* bank 16 registers */
63 #define REG_TXMIR 0x08
64 #define REG_RXMIR 0x0A
66 /* bank 17 registers */
67 #define REG_TXQCR 0x00
68 #define REG_RXQCR 0x02
69 #define REG_TXFDPR 0x04
70 #define REG_RXFDPR 0x06
71 #define REG_QMU_DATA_LO 0x08
72 #define REG_QMU_DATA_HI 0x0A
74 /* bank 18 registers */
76 #define IRQ_LINK_CHANGE 0x8000
79 #define IRQ_RX_OVERRUN 0x0800
80 #define IRQ_TX_STOPPED 0x0200
81 #define IRQ_RX_STOPPED 0x0100
82 #define IRQ_RX_ERROR 0x0080
83 #define ENABLED_IRQS (IRQ_LINK_CHANGE | IRQ_TX | IRQ_RX | IRQ_RX_STOPPED | \
84 IRQ_TX_STOPPED | IRQ_RX_OVERRUN | IRQ_RX_ERROR)
87 #define RXSR_VALID 0x8000
88 #define RXSR_BROADCAST 0x80
89 #define RXSR_MULTICAST 0x40
90 #define RXSR_UNICAST 0x20
91 #define RXSR_FRAMETYPE 0x08
92 #define RXSR_TOO_LONG 0x04
93 #define RXSR_RUNT 0x02
94 #define RXSR_CRC_ERROR 0x01
95 #define RXSR_ERROR (RXSR_TOO_LONG | RXSR_RUNT | RXSR_CRC_ERROR)
97 /* bank 32 registers */
98 #define REG_SW_ID_AND_ENABLE 0x00
99 #define REG_SGCR1 0x02
100 #define REG_SGCR2 0x04
101 #define REG_SGCR3 0x06
103 /* bank 39 registers */
104 #define REG_MACAR1 0x00
105 #define REG_MACAR2 0x02
106 #define REG_MACAR3 0x04
108 /* bank 45 registers */
109 #define REG_P1MBCR 0x00
110 #define REG_P1MBSR 0x02
112 /* bank 46 registers */
113 #define REG_P2MBCR 0x00
114 #define REG_P2MBSR 0x02
116 /* bank 48 registers */
117 #define REG_P1CR2 0x02
119 /* bank 49 registers */
120 #define REG_P1CR4 0x02
121 #define REG_P1SR 0x04
123 /* flags passed by platform_device for configuration */
124 #define MICREL_KS884X 0x01 /* 0=Timeberdale(FPGA), 1=Micrel */
125 #define KS884X_16BIT 0x02 /* 1=16bit, 0=32bit */
127 struct ks8842_adapter {
128 void __iomem *hw_addr;
130 unsigned long conf_flags; /* copy of platform_device config */
131 struct tasklet_struct tasklet;
132 spinlock_t lock; /* spinlock to be interrupt safe */
133 struct work_struct timeout_work;
134 struct net_device *netdev;
137 static inline void ks8842_select_bank(struct ks8842_adapter *adapter, u16 bank)
139 iowrite16(bank, adapter->hw_addr + REG_SELECT_BANK);
142 static inline void ks8842_write8(struct ks8842_adapter *adapter, u16 bank,
143 u8 value, int offset)
145 ks8842_select_bank(adapter, bank);
146 iowrite8(value, adapter->hw_addr + offset);
149 static inline void ks8842_write16(struct ks8842_adapter *adapter, u16 bank,
150 u16 value, int offset)
152 ks8842_select_bank(adapter, bank);
153 iowrite16(value, adapter->hw_addr + offset);
156 static inline void ks8842_enable_bits(struct ks8842_adapter *adapter, u16 bank,
157 u16 bits, int offset)
160 ks8842_select_bank(adapter, bank);
161 reg = ioread16(adapter->hw_addr + offset);
163 iowrite16(reg, adapter->hw_addr + offset);
166 static inline void ks8842_clear_bits(struct ks8842_adapter *adapter, u16 bank,
167 u16 bits, int offset)
170 ks8842_select_bank(adapter, bank);
171 reg = ioread16(adapter->hw_addr + offset);
173 iowrite16(reg, adapter->hw_addr + offset);
176 static inline void ks8842_write32(struct ks8842_adapter *adapter, u16 bank,
177 u32 value, int offset)
179 ks8842_select_bank(adapter, bank);
180 iowrite32(value, adapter->hw_addr + offset);
183 static inline u8 ks8842_read8(struct ks8842_adapter *adapter, u16 bank,
186 ks8842_select_bank(adapter, bank);
187 return ioread8(adapter->hw_addr + offset);
190 static inline u16 ks8842_read16(struct ks8842_adapter *adapter, u16 bank,
193 ks8842_select_bank(adapter, bank);
194 return ioread16(adapter->hw_addr + offset);
197 static inline u32 ks8842_read32(struct ks8842_adapter *adapter, u16 bank,
200 ks8842_select_bank(adapter, bank);
201 return ioread32(adapter->hw_addr + offset);
204 static void ks8842_reset(struct ks8842_adapter *adapter)
206 if (adapter->conf_flags & MICREL_KS884X) {
207 ks8842_write16(adapter, 3, 1, REG_GRR);
209 iowrite16(0, adapter->hw_addr + REG_GRR);
211 /* The KS8842 goes haywire when doing softare reset
212 * a work around in the timberdale IP is implemented to
213 * do a hardware reset instead
214 ks8842_write16(adapter, 3, 1, REG_GRR);
216 iowrite16(0, adapter->hw_addr + REG_GRR);
218 iowrite32(0x1, adapter->hw_addr + REG_TIMB_RST);
223 static void ks8842_update_link_status(struct net_device *netdev,
224 struct ks8842_adapter *adapter)
226 /* check the status of the link */
227 if (ks8842_read16(adapter, 45, REG_P1MBSR) & 0x4) {
228 netif_carrier_on(netdev);
229 netif_wake_queue(netdev);
231 netif_stop_queue(netdev);
232 netif_carrier_off(netdev);
236 static void ks8842_enable_tx(struct ks8842_adapter *adapter)
238 ks8842_enable_bits(adapter, 16, 0x01, REG_TXCR);
241 static void ks8842_disable_tx(struct ks8842_adapter *adapter)
243 ks8842_clear_bits(adapter, 16, 0x01, REG_TXCR);
246 static void ks8842_enable_rx(struct ks8842_adapter *adapter)
248 ks8842_enable_bits(adapter, 16, 0x01, REG_RXCR);
251 static void ks8842_disable_rx(struct ks8842_adapter *adapter)
253 ks8842_clear_bits(adapter, 16, 0x01, REG_RXCR);
256 static void ks8842_reset_hw(struct ks8842_adapter *adapter)
259 ks8842_reset(adapter);
261 /* Enable QMU Transmit flow control / transmit padding / Transmit CRC */
262 ks8842_write16(adapter, 16, 0x000E, REG_TXCR);
264 /* enable the receiver, uni + multi + broadcast + flow ctrl
266 ks8842_write16(adapter, 16, 0x8 | 0x20 | 0x40 | 0x80 | 0x400,
269 /* TX frame pointer autoincrement */
270 ks8842_write16(adapter, 17, 0x4000, REG_TXFDPR);
272 /* RX frame pointer autoincrement */
273 ks8842_write16(adapter, 17, 0x4000, REG_RXFDPR);
275 /* RX 2 kb high watermark */
276 ks8842_write16(adapter, 0, 0x1000, REG_QRFCR);
278 /* aggresive back off in half duplex */
279 ks8842_enable_bits(adapter, 32, 1 << 8, REG_SGCR1);
281 /* enable no excessive collison drop */
282 ks8842_enable_bits(adapter, 32, 1 << 3, REG_SGCR2);
284 /* Enable port 1 force flow control / back pressure / transmit / recv */
285 ks8842_write16(adapter, 48, 0x1E07, REG_P1CR2);
287 /* restart port auto-negotiation */
288 ks8842_enable_bits(adapter, 49, 1 << 13, REG_P1CR4);
290 /* Enable the transmitter */
291 ks8842_enable_tx(adapter);
293 /* Enable the receiver */
294 ks8842_enable_rx(adapter);
296 /* clear all interrupts */
297 ks8842_write16(adapter, 18, 0xffff, REG_ISR);
299 /* enable interrupts */
300 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
302 /* enable the switch */
303 ks8842_write16(adapter, 32, 0x1, REG_SW_ID_AND_ENABLE);
306 static void ks8842_read_mac_addr(struct ks8842_adapter *adapter, u8 *dest)
311 for (i = 0; i < ETH_ALEN; i++)
312 dest[ETH_ALEN - i - 1] = ks8842_read8(adapter, 2, REG_MARL + i);
314 if (adapter->conf_flags & MICREL_KS884X) {
316 the sequence of saving mac addr between MAC and Switch is
320 mac = ks8842_read16(adapter, 2, REG_MARL);
321 ks8842_write16(adapter, 39, mac, REG_MACAR3);
322 mac = ks8842_read16(adapter, 2, REG_MARM);
323 ks8842_write16(adapter, 39, mac, REG_MACAR2);
324 mac = ks8842_read16(adapter, 2, REG_MARH);
325 ks8842_write16(adapter, 39, mac, REG_MACAR1);
328 /* make sure the switch port uses the same MAC as the QMU */
329 mac = ks8842_read16(adapter, 2, REG_MARL);
330 ks8842_write16(adapter, 39, mac, REG_MACAR1);
331 mac = ks8842_read16(adapter, 2, REG_MARM);
332 ks8842_write16(adapter, 39, mac, REG_MACAR2);
333 mac = ks8842_read16(adapter, 2, REG_MARH);
334 ks8842_write16(adapter, 39, mac, REG_MACAR3);
338 static void ks8842_write_mac_addr(struct ks8842_adapter *adapter, u8 *mac)
343 spin_lock_irqsave(&adapter->lock, flags);
344 for (i = 0; i < ETH_ALEN; i++) {
345 ks8842_write8(adapter, 2, mac[ETH_ALEN - i - 1], REG_MARL + i);
346 if (!(adapter->conf_flags & MICREL_KS884X))
347 ks8842_write8(adapter, 39, mac[ETH_ALEN - i - 1],
351 if (adapter->conf_flags & MICREL_KS884X) {
353 the sequence of saving mac addr between MAC and Switch is
359 mac = ks8842_read16(adapter, 2, REG_MARL);
360 ks8842_write16(adapter, 39, mac, REG_MACAR3);
361 mac = ks8842_read16(adapter, 2, REG_MARM);
362 ks8842_write16(adapter, 39, mac, REG_MACAR2);
363 mac = ks8842_read16(adapter, 2, REG_MARH);
364 ks8842_write16(adapter, 39, mac, REG_MACAR1);
366 spin_unlock_irqrestore(&adapter->lock, flags);
369 static inline u16 ks8842_tx_fifo_space(struct ks8842_adapter *adapter)
371 return ks8842_read16(adapter, 16, REG_TXMIR) & 0x1fff;
374 static int ks8842_tx_frame(struct sk_buff *skb, struct net_device *netdev)
376 struct ks8842_adapter *adapter = netdev_priv(netdev);
379 netdev_dbg(netdev, "%s: len %u head %p data %p tail %p end %p\n",
380 __func__, skb->len, skb->head, skb->data,
381 skb_tail_pointer(skb), skb_end_pointer(skb));
383 /* check FIFO buffer space, we need space for CRC and command bits */
384 if (ks8842_tx_fifo_space(adapter) < len + 8)
385 return NETDEV_TX_BUSY;
387 if (adapter->conf_flags & KS884X_16BIT) {
388 u16 *ptr16 = (u16 *)skb->data;
389 ks8842_write16(adapter, 17, 0x8000 | 0x100, REG_QMU_DATA_LO);
390 ks8842_write16(adapter, 17, (u16)len, REG_QMU_DATA_HI);
391 netdev->stats.tx_bytes += len;
395 iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_LO);
396 iowrite16(*ptr16++, adapter->hw_addr + REG_QMU_DATA_HI);
401 u32 *ptr = (u32 *)skb->data;
403 /* the control word, enable IRQ, port 1 and the length */
404 ctrl = 0x8000 | 0x100 | (len << 16);
405 ks8842_write32(adapter, 17, ctrl, REG_QMU_DATA_LO);
407 netdev->stats.tx_bytes += len;
411 iowrite32(*ptr, adapter->hw_addr + REG_QMU_DATA_LO);
418 ks8842_write16(adapter, 17, 1, REG_TXQCR);
425 static void ks8842_rx_frame(struct net_device *netdev,
426 struct ks8842_adapter *adapter)
431 if (adapter->conf_flags & KS884X_16BIT) {
432 status = ks8842_read16(adapter, 17, REG_QMU_DATA_LO);
433 len = ks8842_read16(adapter, 17, REG_QMU_DATA_HI);
434 netdev_dbg(netdev, "%s - rx_data: status: %x\n",
437 status = ks8842_read32(adapter, 17, REG_QMU_DATA_LO);
438 len = (status >> 16) & 0x7ff;
440 netdev_dbg(netdev, "%s - rx_data: status: %x\n",
444 /* check the status */
445 if ((status & RXSR_VALID) && !(status & RXSR_ERROR)) {
446 struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev, len);
448 netdev_dbg(netdev, "%s, got package, len: %d\n", __func__, len);
451 netdev->stats.rx_packets++;
452 netdev->stats.rx_bytes += len;
453 if (status & RXSR_MULTICAST)
454 netdev->stats.multicast++;
456 if (adapter->conf_flags & KS884X_16BIT) {
457 u16 *data16 = (u16 *)skb_put(skb, len);
458 ks8842_select_bank(adapter, 17);
460 *data16++ = ioread16(adapter->hw_addr +
462 *data16++ = ioread16(adapter->hw_addr +
467 u32 *data = (u32 *)skb_put(skb, len);
469 ks8842_select_bank(adapter, 17);
471 *data++ = ioread32(adapter->hw_addr +
476 skb->protocol = eth_type_trans(skb, netdev);
479 netdev->stats.rx_dropped++;
481 netdev_dbg(netdev, "RX error, status: %x\n", status);
482 netdev->stats.rx_errors++;
483 if (status & RXSR_TOO_LONG)
484 netdev->stats.rx_length_errors++;
485 if (status & RXSR_CRC_ERROR)
486 netdev->stats.rx_crc_errors++;
487 if (status & RXSR_RUNT)
488 netdev->stats.rx_frame_errors++;
491 /* set high watermark to 3K */
492 ks8842_clear_bits(adapter, 0, 1 << 12, REG_QRFCR);
494 /* release the frame */
495 ks8842_write16(adapter, 17, 0x01, REG_RXQCR);
497 /* set high watermark to 2K */
498 ks8842_enable_bits(adapter, 0, 1 << 12, REG_QRFCR);
501 void ks8842_handle_rx(struct net_device *netdev, struct ks8842_adapter *adapter)
503 u16 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
504 netdev_dbg(netdev, "%s Entry - rx_data: %d\n", __func__, rx_data);
506 ks8842_rx_frame(netdev, adapter);
507 rx_data = ks8842_read16(adapter, 16, REG_RXMIR) & 0x1fff;
511 void ks8842_handle_tx(struct net_device *netdev, struct ks8842_adapter *adapter)
513 u16 sr = ks8842_read16(adapter, 16, REG_TXSR);
514 netdev_dbg(netdev, "%s - entry, sr: %x\n", __func__, sr);
515 netdev->stats.tx_packets++;
516 if (netif_queue_stopped(netdev))
517 netif_wake_queue(netdev);
520 void ks8842_handle_rx_overrun(struct net_device *netdev,
521 struct ks8842_adapter *adapter)
523 netdev_dbg(netdev, "%s: entry\n", __func__);
524 netdev->stats.rx_errors++;
525 netdev->stats.rx_fifo_errors++;
528 void ks8842_tasklet(unsigned long arg)
530 struct net_device *netdev = (struct net_device *)arg;
531 struct ks8842_adapter *adapter = netdev_priv(netdev);
536 /* read current bank to be able to set it back */
537 spin_lock_irqsave(&adapter->lock, flags);
538 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
539 spin_unlock_irqrestore(&adapter->lock, flags);
541 isr = ks8842_read16(adapter, 18, REG_ISR);
542 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
545 ks8842_write16(adapter, 18, isr, REG_ISR);
547 if (!(adapter->conf_flags & MICREL_KS884X))
548 /* Ack in the timberdale IP as well */
549 iowrite32(0x1, adapter->hw_addr + REG_TIMB_IAR);
551 if (!netif_running(netdev))
554 if (isr & IRQ_LINK_CHANGE)
555 ks8842_update_link_status(netdev, adapter);
557 if (isr & (IRQ_RX | IRQ_RX_ERROR))
558 ks8842_handle_rx(netdev, adapter);
561 ks8842_handle_tx(netdev, adapter);
563 if (isr & IRQ_RX_OVERRUN)
564 ks8842_handle_rx_overrun(netdev, adapter);
566 if (isr & IRQ_TX_STOPPED) {
567 ks8842_disable_tx(adapter);
568 ks8842_enable_tx(adapter);
571 if (isr & IRQ_RX_STOPPED) {
572 ks8842_disable_rx(adapter);
573 ks8842_enable_rx(adapter);
576 /* re-enable interrupts, put back the bank selection register */
577 spin_lock_irqsave(&adapter->lock, flags);
578 ks8842_write16(adapter, 18, ENABLED_IRQS, REG_IER);
579 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
580 spin_unlock_irqrestore(&adapter->lock, flags);
583 static irqreturn_t ks8842_irq(int irq, void *devid)
585 struct net_device *netdev = devid;
586 struct ks8842_adapter *adapter = netdev_priv(netdev);
588 u16 entry_bank = ioread16(adapter->hw_addr + REG_SELECT_BANK);
589 irqreturn_t ret = IRQ_NONE;
591 isr = ks8842_read16(adapter, 18, REG_ISR);
592 netdev_dbg(netdev, "%s - ISR: 0x%x\n", __func__, isr);
596 ks8842_write16(adapter, 18, 0x00, REG_IER);
598 /* schedule tasklet */
599 tasklet_schedule(&adapter->tasklet);
604 iowrite16(entry_bank, adapter->hw_addr + REG_SELECT_BANK);
610 /* Netdevice operations */
612 static int ks8842_open(struct net_device *netdev)
614 struct ks8842_adapter *adapter = netdev_priv(netdev);
617 netdev_dbg(netdev, "%s - entry\n", __func__);
620 ks8842_reset_hw(adapter);
622 ks8842_write_mac_addr(adapter, netdev->dev_addr);
624 ks8842_update_link_status(netdev, adapter);
626 err = request_irq(adapter->irq, ks8842_irq, IRQF_SHARED, DRV_NAME,
629 pr_err("Failed to request IRQ: %d: %d\n", adapter->irq, err);
636 static int ks8842_close(struct net_device *netdev)
638 struct ks8842_adapter *adapter = netdev_priv(netdev);
640 netdev_dbg(netdev, "%s - entry\n", __func__);
642 cancel_work_sync(&adapter->timeout_work);
645 free_irq(adapter->irq, netdev);
647 /* disable the switch */
648 ks8842_write16(adapter, 32, 0x0, REG_SW_ID_AND_ENABLE);
653 static netdev_tx_t ks8842_xmit_frame(struct sk_buff *skb,
654 struct net_device *netdev)
657 struct ks8842_adapter *adapter = netdev_priv(netdev);
659 netdev_dbg(netdev, "%s: entry\n", __func__);
661 ret = ks8842_tx_frame(skb, netdev);
663 if (ks8842_tx_fifo_space(adapter) < netdev->mtu + 8)
664 netif_stop_queue(netdev);
669 static int ks8842_set_mac(struct net_device *netdev, void *p)
671 struct ks8842_adapter *adapter = netdev_priv(netdev);
672 struct sockaddr *addr = p;
673 char *mac = (u8 *)addr->sa_data;
675 netdev_dbg(netdev, "%s: entry\n", __func__);
677 if (!is_valid_ether_addr(addr->sa_data))
678 return -EADDRNOTAVAIL;
680 memcpy(netdev->dev_addr, mac, netdev->addr_len);
682 ks8842_write_mac_addr(adapter, mac);
686 static void ks8842_tx_timeout_work(struct work_struct *work)
688 struct ks8842_adapter *adapter =
689 container_of(work, struct ks8842_adapter, timeout_work);
690 struct net_device *netdev = adapter->netdev;
693 netdev_dbg(netdev, "%s: entry\n", __func__);
695 spin_lock_irqsave(&adapter->lock, flags);
696 /* disable interrupts */
697 ks8842_write16(adapter, 18, 0, REG_IER);
698 ks8842_write16(adapter, 18, 0xFFFF, REG_ISR);
700 netif_stop_queue(netdev);
702 spin_unlock_irqrestore(&adapter->lock, flags);
704 ks8842_reset_hw(adapter);
706 ks8842_write_mac_addr(adapter, netdev->dev_addr);
708 ks8842_update_link_status(netdev, adapter);
711 static void ks8842_tx_timeout(struct net_device *netdev)
713 struct ks8842_adapter *adapter = netdev_priv(netdev);
715 netdev_dbg(netdev, "%s: entry\n", __func__);
717 schedule_work(&adapter->timeout_work);
720 static const struct net_device_ops ks8842_netdev_ops = {
721 .ndo_open = ks8842_open,
722 .ndo_stop = ks8842_close,
723 .ndo_start_xmit = ks8842_xmit_frame,
724 .ndo_set_mac_address = ks8842_set_mac,
725 .ndo_tx_timeout = ks8842_tx_timeout,
726 .ndo_validate_addr = eth_validate_addr
729 static const struct ethtool_ops ks8842_ethtool_ops = {
730 .get_link = ethtool_op_get_link,
733 static int __devinit ks8842_probe(struct platform_device *pdev)
736 struct resource *iomem;
737 struct net_device *netdev;
738 struct ks8842_adapter *adapter;
739 struct ks8842_platform_data *pdata = pdev->dev.platform_data;
743 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
744 if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
747 netdev = alloc_etherdev(sizeof(struct ks8842_adapter));
749 goto err_alloc_etherdev;
751 SET_NETDEV_DEV(netdev, &pdev->dev);
753 adapter = netdev_priv(netdev);
754 adapter->netdev = netdev;
755 INIT_WORK(&adapter->timeout_work, ks8842_tx_timeout_work);
756 adapter->hw_addr = ioremap(iomem->start, resource_size(iomem));
757 adapter->conf_flags = iomem->flags;
759 if (!adapter->hw_addr)
762 adapter->irq = platform_get_irq(pdev, 0);
763 if (adapter->irq < 0) {
768 tasklet_init(&adapter->tasklet, ks8842_tasklet, (unsigned long)netdev);
769 spin_lock_init(&adapter->lock);
771 netdev->netdev_ops = &ks8842_netdev_ops;
772 netdev->ethtool_ops = &ks8842_ethtool_ops;
774 /* Check if a mac address was given */
775 i = netdev->addr_len;
777 for (i = 0; i < netdev->addr_len; i++)
778 if (pdata->macaddr[i] != 0)
781 if (i < netdev->addr_len)
782 /* an address was passed, use it */
783 memcpy(netdev->dev_addr, pdata->macaddr,
787 if (i == netdev->addr_len) {
788 ks8842_read_mac_addr(adapter, netdev->dev_addr);
790 if (!is_valid_ether_addr(netdev->dev_addr))
791 random_ether_addr(netdev->dev_addr);
794 id = ks8842_read16(adapter, 32, REG_SW_ID_AND_ENABLE);
796 strcpy(netdev->name, "eth%d");
797 err = register_netdev(netdev);
801 platform_set_drvdata(pdev, netdev);
803 pr_info("Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n",
804 (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7);
810 iounmap(adapter->hw_addr);
814 release_mem_region(iomem->start, resource_size(iomem));
819 static int __devexit ks8842_remove(struct platform_device *pdev)
821 struct net_device *netdev = platform_get_drvdata(pdev);
822 struct ks8842_adapter *adapter = netdev_priv(netdev);
823 struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
825 unregister_netdev(netdev);
826 tasklet_kill(&adapter->tasklet);
827 iounmap(adapter->hw_addr);
829 release_mem_region(iomem->start, resource_size(iomem));
830 platform_set_drvdata(pdev, NULL);
835 static struct platform_driver ks8842_platform_driver = {
838 .owner = THIS_MODULE,
840 .probe = ks8842_probe,
841 .remove = ks8842_remove,
844 static int __init ks8842_init(void)
846 return platform_driver_register(&ks8842_platform_driver);
849 static void __exit ks8842_exit(void)
851 platform_driver_unregister(&ks8842_platform_driver);
854 module_init(ks8842_init);
855 module_exit(ks8842_exit);
857 MODULE_DESCRIPTION("Timberdale KS8842 ethernet driver");
858 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
859 MODULE_LICENSE("GPL v2");
860 MODULE_ALIAS("platform:ks8842");