2 * Alchemy Semi Au1000 IrDA driver
4 * Copyright 2001 MontaVista Software Inc.
5 * Author: MontaVista Software, Inc.
6 * ppopov@mvista.com or source@mvista.com
8 * This program is free software; you can distribute it and/or modify it
9 * under the terms of the GNU General Public License (Version 2) as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include <linux/clk.h>
22 #include <linux/module.h>
23 #include <linux/netdevice.h>
24 #include <linux/interrupt.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/types.h>
29 #include <net/irda/irda.h>
30 #include <net/irda/irmod.h>
31 #include <net/irda/wrapper.h>
32 #include <net/irda/irda_device.h>
33 #include <asm/mach-au1x00/au1000.h>
36 #define IR_RING_PTR_STATUS 0x00
37 #define IR_RING_BASE_ADDR_H 0x04
38 #define IR_RING_BASE_ADDR_L 0x08
39 #define IR_RING_SIZE 0x0C
40 #define IR_RING_PROMPT 0x10
41 #define IR_RING_ADDR_CMPR 0x14
42 #define IR_INT_CLEAR 0x18
43 #define IR_CONFIG_1 0x20
44 #define IR_SIR_FLAGS 0x24
45 #define IR_STATUS 0x28
46 #define IR_READ_PHY_CONFIG 0x2C
47 #define IR_WRITE_PHY_CONFIG 0x30
48 #define IR_MAX_PKT_LEN 0x34
49 #define IR_RX_BYTE_CNT 0x38
50 #define IR_CONFIG_2 0x3C
51 #define IR_ENABLE 0x40
54 #define IR_RX_INVERT_LED (1 << 0)
55 #define IR_TX_INVERT_LED (1 << 1)
56 #define IR_ST (1 << 2)
57 #define IR_SF (1 << 3)
58 #define IR_SIR (1 << 4)
59 #define IR_MIR (1 << 5)
60 #define IR_FIR (1 << 6)
61 #define IR_16CRC (1 << 7)
62 #define IR_TD (1 << 8)
63 #define IR_RX_ALL (1 << 9)
64 #define IR_DMA_ENABLE (1 << 10)
65 #define IR_RX_ENABLE (1 << 11)
66 #define IR_TX_ENABLE (1 << 12)
67 #define IR_LOOPBACK (1 << 14)
68 #define IR_SIR_MODE (IR_SIR | IR_DMA_ENABLE | \
69 IR_RX_ALL | IR_RX_ENABLE | IR_SF | \
73 #define IR_RX_STATUS (1 << 9)
74 #define IR_TX_STATUS (1 << 10)
75 #define IR_PHYEN (1 << 15)
77 /* ir_write_phy_config */
78 #define IR_BR(x) (((x) & 0x3f) << 10) /* baud rate */
79 #define IR_PW(x) (((x) & 0x1f) << 5) /* pulse width */
80 #define IR_P(x) ((x) & 0x1f) /* preamble bits */
83 #define IR_MODE_INV (1 << 0)
84 #define IR_ONE_PIN (1 << 1)
85 #define IR_PHYCLK_40MHZ (0 << 2)
86 #define IR_PHYCLK_48MHZ (1 << 2)
87 #define IR_PHYCLK_56MHZ (2 << 2)
88 #define IR_PHYCLK_64MHZ (3 << 2)
89 #define IR_DP (1 << 4)
90 #define IR_DA (1 << 5)
91 #define IR_FLT_HIGH (0 << 6)
92 #define IR_FLT_MEDHI (1 << 6)
93 #define IR_FLT_MEDLO (2 << 6)
94 #define IR_FLT_LO (3 << 6)
95 #define IR_IEN (1 << 8)
98 #define IR_HC (1 << 3) /* divide SBUS clock by 2 */
99 #define IR_CE (1 << 2) /* clock enable */
100 #define IR_C (1 << 1) /* coherency bit */
101 #define IR_BE (1 << 0) /* set in big endian mode */
103 #define NUM_IR_DESC 64
104 #define RING_SIZE_4 0x0
105 #define RING_SIZE_16 0x3
106 #define RING_SIZE_64 0xF
107 #define MAX_NUM_IR_DESC 64
108 #define MAX_BUF_SIZE 2048
110 /* Ring descriptor flags */
111 #define AU_OWN (1 << 7) /* tx,rx */
112 #define IR_DIS_CRC (1 << 6) /* tx */
113 #define IR_BAD_CRC (1 << 5) /* tx */
114 #define IR_NEED_PULSE (1 << 4) /* tx */
115 #define IR_FORCE_UNDER (1 << 3) /* tx */
116 #define IR_DISABLE_TX (1 << 2) /* tx */
117 #define IR_HW_UNDER (1 << 0) /* tx */
118 #define IR_TX_ERROR (IR_DIS_CRC | IR_BAD_CRC | IR_HW_UNDER)
120 #define IR_PHY_ERROR (1 << 6) /* rx */
121 #define IR_CRC_ERROR (1 << 5) /* rx */
122 #define IR_MAX_LEN (1 << 4) /* rx */
123 #define IR_FIFO_OVER (1 << 3) /* rx */
124 #define IR_SIR_ERROR (1 << 2) /* rx */
125 #define IR_RX_ERROR (IR_PHY_ERROR | IR_CRC_ERROR | \
126 IR_MAX_LEN | IR_FIFO_OVER | IR_SIR_ERROR)
129 struct db_dest *pnext;
135 u8 count_0; /* 7:0 */
136 u8 count_1; /* 12:8 */
140 u8 addr_1; /* 15:8 */
141 u8 addr_2; /* 23:16 */
142 u8 addr_3; /* 31:24 */
145 /* Private data for each instance */
146 struct au1k_private {
147 void __iomem *iobase;
150 struct db_dest *pDBfree;
151 struct db_dest db[2 * NUM_IR_DESC];
152 volatile struct ring_dest *rx_ring[NUM_IR_DESC];
153 volatile struct ring_dest *tx_ring[NUM_IR_DESC];
154 struct db_dest *rx_db_inuse[NUM_IR_DESC];
155 struct db_dest *tx_db_inuse[NUM_IR_DESC];
163 struct net_device *netdev;
165 struct irlap_cb *irlap;
171 struct resource *ioarea;
172 struct au1k_irda_platform_data *platdata;
173 struct clk *irda_clk;
176 static int qos_mtt_bits = 0x07; /* 1 ms or more */
178 static void au1k_irda_plat_set_phy_mode(struct au1k_private *p, int mode)
180 if (p->platdata && p->platdata->set_phy_mode)
181 p->platdata->set_phy_mode(mode);
184 static inline unsigned long irda_read(struct au1k_private *p,
188 * IrDA peripheral bug. You have to read the register
189 * twice to get the right value.
191 (void)__raw_readl(p->iobase + ofs);
192 return __raw_readl(p->iobase + ofs);
195 static inline void irda_write(struct au1k_private *p, unsigned long ofs,
198 __raw_writel(val, p->iobase + ofs);
203 * Buffer allocation/deallocation routines. The buffer descriptor returned
204 * has the virtual and dma address of a buffer suitable for
205 * both, receive and transmit operations.
207 static struct db_dest *GetFreeDB(struct au1k_private *aup)
213 aup->pDBfree = db->pnext;
218 DMA memory allocation, derived from pci_alloc_consistent.
219 However, the Au1000 data cache is coherent (when programmed
220 so), therefore we return KSEG0 address, not KSEG1.
222 static void *dma_alloc(size_t size, dma_addr_t *dma_handle)
225 int gfp = GFP_ATOMIC | GFP_DMA;
227 ret = (void *)__get_free_pages(gfp, get_order(size));
230 memset(ret, 0, size);
231 *dma_handle = virt_to_bus(ret);
232 ret = (void *)KSEG0ADDR(ret);
237 static void dma_free(void *vaddr, size_t size)
239 vaddr = (void *)KSEG0ADDR(vaddr);
240 free_pages((unsigned long) vaddr, get_order(size));
244 static void setup_hw_rings(struct au1k_private *aup, u32 rx_base, u32 tx_base)
247 for (i = 0; i < NUM_IR_DESC; i++) {
248 aup->rx_ring[i] = (volatile struct ring_dest *)
249 (rx_base + sizeof(struct ring_dest) * i);
251 for (i = 0; i < NUM_IR_DESC; i++) {
252 aup->tx_ring[i] = (volatile struct ring_dest *)
253 (tx_base + sizeof(struct ring_dest) * i);
257 static int au1k_irda_init_iobuf(iobuff_t *io, int size)
259 io->head = kmalloc(size, GFP_KERNEL);
260 if (io->head != NULL) {
262 io->in_frame = FALSE;
263 io->state = OUTSIDE_FRAME;
266 return io->head ? 0 : -ENOMEM;
270 * Set the IrDA communications speed.
272 static int au1k_irda_set_speed(struct net_device *dev, int speed)
274 struct au1k_private *aup = netdev_priv(dev);
275 volatile struct ring_dest *ptxd;
276 unsigned long control;
277 int ret = 0, timeout = 10, i;
279 if (speed == aup->speed)
282 /* disable PHY first */
283 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
284 irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN);
287 irda_write(aup, IR_CONFIG_1,
288 irda_read(aup, IR_CONFIG_1) & ~(IR_RX_ENABLE | IR_TX_ENABLE));
290 while (irda_read(aup, IR_STATUS) & (IR_RX_STATUS | IR_TX_STATUS)) {
293 printk(KERN_ERR "%s: rx/tx disable timeout\n",
300 irda_write(aup, IR_CONFIG_1,
301 irda_read(aup, IR_CONFIG_1) & ~IR_DMA_ENABLE);
304 /* After we disable tx/rx. the index pointers go back to zero. */
305 aup->tx_head = aup->tx_tail = aup->rx_head = 0;
306 for (i = 0; i < NUM_IR_DESC; i++) {
307 ptxd = aup->tx_ring[i];
313 for (i = 0; i < NUM_IR_DESC; i++) {
314 ptxd = aup->rx_ring[i];
317 ptxd->flags = AU_OWN;
320 if (speed == 4000000)
321 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_FIR);
323 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR);
327 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(11) | IR_PW(12));
328 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
331 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(5) | IR_PW(12));
332 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
335 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(2) | IR_PW(12));
336 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
339 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_BR(1) | IR_PW(12));
340 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
343 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_PW(12));
344 irda_write(aup, IR_CONFIG_1, IR_SIR_MODE);
347 irda_write(aup, IR_WRITE_PHY_CONFIG, IR_P(15));
348 irda_write(aup, IR_CONFIG_1, IR_FIR | IR_DMA_ENABLE |
352 printk(KERN_ERR "%s unsupported speed %x\n", dev->name, speed);
358 irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) | IR_PHYEN);
360 control = irda_read(aup, IR_STATUS);
361 irda_write(aup, IR_RING_PROMPT, 0);
363 if (control & (1 << 14)) {
364 printk(KERN_ERR "%s: configuration error\n", dev->name);
366 if (control & (1 << 11))
367 printk(KERN_DEBUG "%s Valid SIR config\n", dev->name);
368 if (control & (1 << 12))
369 printk(KERN_DEBUG "%s Valid MIR config\n", dev->name);
370 if (control & (1 << 13))
371 printk(KERN_DEBUG "%s Valid FIR config\n", dev->name);
372 if (control & (1 << 10))
373 printk(KERN_DEBUG "%s TX enabled\n", dev->name);
374 if (control & (1 << 9))
375 printk(KERN_DEBUG "%s RX enabled\n", dev->name);
381 static void update_rx_stats(struct net_device *dev, u32 status, u32 count)
383 struct net_device_stats *ps = &dev->stats;
387 if (status & IR_RX_ERROR) {
389 if (status & (IR_PHY_ERROR | IR_FIFO_OVER))
390 ps->rx_missed_errors++;
391 if (status & IR_MAX_LEN)
392 ps->rx_length_errors++;
393 if (status & IR_CRC_ERROR)
396 ps->rx_bytes += count;
399 static void update_tx_stats(struct net_device *dev, u32 status, u32 pkt_len)
401 struct net_device_stats *ps = &dev->stats;
404 ps->tx_bytes += pkt_len;
406 if (status & IR_TX_ERROR) {
408 ps->tx_aborted_errors++;
412 static void au1k_tx_ack(struct net_device *dev)
414 struct au1k_private *aup = netdev_priv(dev);
415 volatile struct ring_dest *ptxd;
417 ptxd = aup->tx_ring[aup->tx_tail];
418 while (!(ptxd->flags & AU_OWN) && (aup->tx_tail != aup->tx_head)) {
419 update_tx_stats(dev, ptxd->flags,
420 (ptxd->count_1 << 8) | ptxd->count_0);
424 aup->tx_tail = (aup->tx_tail + 1) & (NUM_IR_DESC - 1);
425 ptxd = aup->tx_ring[aup->tx_tail];
429 netif_wake_queue(dev);
433 if (aup->tx_tail == aup->tx_head) {
435 au1k_irda_set_speed(dev, aup->newspeed);
438 irda_write(aup, IR_CONFIG_1,
439 irda_read(aup, IR_CONFIG_1) & ~IR_TX_ENABLE);
440 irda_write(aup, IR_CONFIG_1,
441 irda_read(aup, IR_CONFIG_1) | IR_RX_ENABLE);
442 irda_write(aup, IR_RING_PROMPT, 0);
447 static int au1k_irda_rx(struct net_device *dev)
449 struct au1k_private *aup = netdev_priv(dev);
450 volatile struct ring_dest *prxd;
455 prxd = aup->rx_ring[aup->rx_head];
458 while (!(flags & AU_OWN)) {
459 pDB = aup->rx_db_inuse[aup->rx_head];
460 count = (prxd->count_1 << 8) | prxd->count_0;
461 if (!(flags & IR_RX_ERROR)) {
463 update_rx_stats(dev, flags, count);
464 skb = alloc_skb(count + 1, GFP_ATOMIC);
466 dev->stats.rx_dropped++;
470 if (aup->speed == 4000000)
473 skb_put(skb, count - 2);
474 skb_copy_to_linear_data(skb, (void *)pDB->vaddr,
477 skb_reset_mac_header(skb);
478 skb->protocol = htons(ETH_P_IRDA);
483 prxd->flags |= AU_OWN;
484 aup->rx_head = (aup->rx_head + 1) & (NUM_IR_DESC - 1);
485 irda_write(aup, IR_RING_PROMPT, 0);
487 /* next descriptor */
488 prxd = aup->rx_ring[aup->rx_head];
495 static irqreturn_t au1k_irda_interrupt(int dummy, void *dev_id)
497 struct net_device *dev = dev_id;
498 struct au1k_private *aup = netdev_priv(dev);
500 irda_write(aup, IR_INT_CLEAR, 0); /* ack irda interrupts */
508 static int au1k_init(struct net_device *dev)
510 struct au1k_private *aup = netdev_priv(dev);
511 u32 enable, ring_address, phyck;
515 c = clk_get(NULL, "irda_clk");
518 i = clk_prepare_enable(c);
524 switch (clk_get_rate(c)) {
526 phyck = IR_PHYCLK_40MHZ;
529 phyck = IR_PHYCLK_48MHZ;
532 phyck = IR_PHYCLK_56MHZ;
535 phyck = IR_PHYCLK_64MHZ;
538 clk_disable_unprepare(c);
544 enable = IR_HC | IR_CE | IR_C;
545 #ifndef CONFIG_CPU_LITTLE_ENDIAN
552 for (i = 0; i < NUM_IR_DESC; i++)
553 aup->rx_ring[i]->flags = AU_OWN;
555 irda_write(aup, IR_ENABLE, enable);
559 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
560 irda_write(aup, IR_STATUS, irda_read(aup, IR_STATUS) & ~IR_PHYEN);
563 irda_write(aup, IR_MAX_PKT_LEN, MAX_BUF_SIZE);
565 ring_address = (u32)virt_to_phys((void *)aup->rx_ring[0]);
566 irda_write(aup, IR_RING_BASE_ADDR_H, ring_address >> 26);
567 irda_write(aup, IR_RING_BASE_ADDR_L, (ring_address >> 10) & 0xffff);
569 irda_write(aup, IR_RING_SIZE,
570 (RING_SIZE_64 << 8) | (RING_SIZE_64 << 12));
572 irda_write(aup, IR_CONFIG_2, phyck | IR_ONE_PIN);
573 irda_write(aup, IR_RING_ADDR_CMPR, 0);
575 au1k_irda_set_speed(dev, 9600);
579 static int au1k_irda_start(struct net_device *dev)
581 struct au1k_private *aup = netdev_priv(dev);
585 retval = au1k_init(dev);
587 printk(KERN_ERR "%s: error in au1k_init\n", dev->name);
591 retval = request_irq(aup->irq_tx, &au1k_irda_interrupt, 0,
594 printk(KERN_ERR "%s: unable to get IRQ %d\n",
595 dev->name, dev->irq);
598 retval = request_irq(aup->irq_rx, &au1k_irda_interrupt, 0,
601 free_irq(aup->irq_tx, dev);
602 printk(KERN_ERR "%s: unable to get IRQ %d\n",
603 dev->name, dev->irq);
607 /* Give self a hardware name */
608 sprintf(hwname, "Au1000 SIR/FIR");
609 aup->irlap = irlap_open(dev, &aup->qos, hwname);
610 netif_start_queue(dev);
613 irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) | IR_IEN);
616 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_SIR);
621 static int au1k_irda_stop(struct net_device *dev)
623 struct au1k_private *aup = netdev_priv(dev);
625 au1k_irda_plat_set_phy_mode(aup, AU1000_IRDA_PHY_MODE_OFF);
627 /* disable interrupts */
628 irda_write(aup, IR_CONFIG_2, irda_read(aup, IR_CONFIG_2) & ~IR_IEN);
629 irda_write(aup, IR_CONFIG_1, 0);
630 irda_write(aup, IR_ENABLE, 0); /* disable clock */
633 irlap_close(aup->irlap);
637 netif_stop_queue(dev);
639 /* disable the interrupt */
640 free_irq(aup->irq_tx, dev);
641 free_irq(aup->irq_rx, dev);
643 clk_disable_unprepare(aup->irda_clk);
644 clk_put(aup->irda_clk);
650 * Au1000 transmit routine.
652 static int au1k_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
654 struct au1k_private *aup = netdev_priv(dev);
655 int speed = irda_get_next_speed(skb);
656 volatile struct ring_dest *ptxd;
660 if (speed != aup->speed && speed != -1)
661 aup->newspeed = speed;
663 if ((skb->len == 0) && (aup->newspeed)) {
664 if (aup->tx_tail == aup->tx_head) {
665 au1k_irda_set_speed(dev, speed);
672 ptxd = aup->tx_ring[aup->tx_head];
675 if (flags & AU_OWN) {
676 printk(KERN_DEBUG "%s: tx_full\n", dev->name);
677 netif_stop_queue(dev);
680 } else if (((aup->tx_head + 1) & (NUM_IR_DESC - 1)) == aup->tx_tail) {
681 printk(KERN_DEBUG "%s: tx_full\n", dev->name);
682 netif_stop_queue(dev);
687 pDB = aup->tx_db_inuse[aup->tx_head];
690 if (irda_read(aup, IR_RX_BYTE_CNT) != 0) {
691 printk(KERN_DEBUG "tx warning: rx byte cnt %x\n",
692 irda_read(aup, IR_RX_BYTE_CNT));
696 if (aup->speed == 4000000) {
698 skb_copy_from_linear_data(skb, (void *)pDB->vaddr, skb->len);
699 ptxd->count_0 = skb->len & 0xff;
700 ptxd->count_1 = (skb->len >> 8) & 0xff;
703 len = async_wrap_skb(skb, (u8 *)pDB->vaddr, MAX_BUF_SIZE);
704 ptxd->count_0 = len & 0xff;
705 ptxd->count_1 = (len >> 8) & 0xff;
706 ptxd->flags |= IR_DIS_CRC;
708 ptxd->flags |= AU_OWN;
711 irda_write(aup, IR_CONFIG_1,
712 irda_read(aup, IR_CONFIG_1) | IR_TX_ENABLE);
713 irda_write(aup, IR_RING_PROMPT, 0);
716 aup->tx_head = (aup->tx_head + 1) & (NUM_IR_DESC - 1);
721 * The Tx ring has been full longer than the watchdog timeout
722 * value. The transmitter must be hung?
724 static void au1k_tx_timeout(struct net_device *dev)
727 struct au1k_private *aup = netdev_priv(dev);
729 printk(KERN_ERR "%s: tx timeout\n", dev->name);
732 au1k_irda_set_speed(dev, speed);
734 netif_wake_queue(dev);
737 static int au1k_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
739 struct if_irda_req *rq = (struct if_irda_req *)ifreq;
740 struct au1k_private *aup = netdev_priv(dev);
741 int ret = -EOPNOTSUPP;
745 if (capable(CAP_NET_ADMIN)) {
747 * We are unable to set the speed if the
748 * device is not running.
751 ret = au1k_irda_set_speed(dev,
754 printk(KERN_ERR "%s ioctl: !netif_running\n",
763 if (capable(CAP_NET_ADMIN)) {
764 irda_device_set_media_busy(dev, TRUE);
770 rq->ifr_receiving = 0;
778 static const struct net_device_ops au1k_irda_netdev_ops = {
779 .ndo_open = au1k_irda_start,
780 .ndo_stop = au1k_irda_stop,
781 .ndo_start_xmit = au1k_irda_hard_xmit,
782 .ndo_tx_timeout = au1k_tx_timeout,
783 .ndo_do_ioctl = au1k_irda_ioctl,
786 static int au1k_irda_net_init(struct net_device *dev)
788 struct au1k_private *aup = netdev_priv(dev);
789 struct db_dest *pDB, *pDBfree;
790 int i, err, retval = 0;
793 err = au1k_irda_init_iobuf(&aup->rx_buff, 14384);
797 dev->netdev_ops = &au1k_irda_netdev_ops;
799 irda_init_max_qos_capabilies(&aup->qos);
801 /* The only value we must override it the baudrate */
802 aup->qos.baud_rate.bits = IR_9600 | IR_19200 | IR_38400 |
803 IR_57600 | IR_115200 | IR_576000 | (IR_4000000 << 8);
805 aup->qos.min_turn_time.bits = qos_mtt_bits;
806 irda_qos_bits_to_value(&aup->qos);
810 /* Tx ring follows rx ring + 512 bytes */
811 /* we need a 1k aligned buffer */
812 aup->rx_ring[0] = (struct ring_dest *)
813 dma_alloc(2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)),
815 if (!aup->rx_ring[0])
818 /* allocate the data buffers */
820 dma_alloc(MAX_BUF_SIZE * 2 * NUM_IR_DESC, &temp);
821 if (!aup->db[0].vaddr)
824 setup_hw_rings(aup, (u32)aup->rx_ring[0], (u32)aup->rx_ring[0] + 512);
828 for (i = 0; i < (2 * NUM_IR_DESC); i++) {
829 pDB->pnext = pDBfree;
832 (u32 *)((unsigned)aup->db[0].vaddr + (MAX_BUF_SIZE * i));
833 pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
836 aup->pDBfree = pDBfree;
838 /* attach a data buffer to each descriptor */
839 for (i = 0; i < NUM_IR_DESC; i++) {
840 pDB = GetFreeDB(aup);
843 aup->rx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
844 aup->rx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff);
845 aup->rx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff);
846 aup->rx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff);
847 aup->rx_db_inuse[i] = pDB;
849 for (i = 0; i < NUM_IR_DESC; i++) {
850 pDB = GetFreeDB(aup);
853 aup->tx_ring[i]->addr_0 = (u8)(pDB->dma_addr & 0xff);
854 aup->tx_ring[i]->addr_1 = (u8)((pDB->dma_addr >> 8) & 0xff);
855 aup->tx_ring[i]->addr_2 = (u8)((pDB->dma_addr >> 16) & 0xff);
856 aup->tx_ring[i]->addr_3 = (u8)((pDB->dma_addr >> 24) & 0xff);
857 aup->tx_ring[i]->count_0 = 0;
858 aup->tx_ring[i]->count_1 = 0;
859 aup->tx_ring[i]->flags = 0;
860 aup->tx_db_inuse[i] = pDB;
866 dma_free((void *)aup->rx_ring[0],
867 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
869 kfree(aup->rx_buff.head);
871 printk(KERN_ERR "au1k_irda_net_init() failed. Returns %d\n", retval);
875 static int au1k_irda_probe(struct platform_device *pdev)
877 struct au1k_private *aup;
878 struct net_device *dev;
883 dev = alloc_irdadev(sizeof(struct au1k_private));
887 aup = netdev_priv(dev);
889 aup->platdata = pdev->dev.platform_data;
892 r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
896 aup->irq_tx = r->start;
898 r = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
902 aup->irq_rx = r->start;
904 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
909 aup->ioarea = request_mem_region(r->start, resource_size(r),
914 /* bail out early if clock doesn't exist */
915 c = clk_get(NULL, "irda_clk");
922 aup->iobase = ioremap_nocache(r->start, resource_size(r));
926 dev->irq = aup->irq_rx;
928 err = au1k_irda_net_init(dev);
931 err = register_netdev(dev);
935 platform_set_drvdata(pdev, dev);
937 printk(KERN_INFO "IrDA: Registered device %s\n", dev->name);
941 dma_free((void *)aup->db[0].vaddr,
942 MAX_BUF_SIZE * 2 * NUM_IR_DESC);
943 dma_free((void *)aup->rx_ring[0],
944 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
945 kfree(aup->rx_buff.head);
947 iounmap(aup->iobase);
949 release_resource(aup->ioarea);
956 static int au1k_irda_remove(struct platform_device *pdev)
958 struct net_device *dev = platform_get_drvdata(pdev);
959 struct au1k_private *aup = netdev_priv(dev);
961 unregister_netdev(dev);
963 dma_free((void *)aup->db[0].vaddr,
964 MAX_BUF_SIZE * 2 * NUM_IR_DESC);
965 dma_free((void *)aup->rx_ring[0],
966 2 * MAX_NUM_IR_DESC * (sizeof(struct ring_dest)));
967 kfree(aup->rx_buff.head);
969 iounmap(aup->iobase);
970 release_resource(aup->ioarea);
978 static struct platform_driver au1k_irda_driver = {
980 .name = "au1000-irda",
982 .probe = au1k_irda_probe,
983 .remove = au1k_irda_remove,
986 module_platform_driver(au1k_irda_driver);
988 MODULE_AUTHOR("Pete Popov <ppopov@mvista.com>");
989 MODULE_DESCRIPTION("Au1000 IrDA Device Driver");