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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Ralf Baechlef90fdc32006-02-08 23:23:26 +00002 * Copyright (C) 2001,2002,2003,2004 Broadcom Corporation
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01003 * Copyright (c) 2006, 2007 Maciej W. Rozycki
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
Ralf Baechle74b02472005-10-19 15:40:02 +010014 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 *
20 * This driver is designed for the Broadcom SiByte SOC built-in
21 * Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp.
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010022 *
23 * Updated to the driver model and the PHY abstraction layer
24 * by Maciej W. Rozycki.
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010026
27#include <linux/bug.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/string.h>
31#include <linux/timer.h>
32#include <linux/errno.h>
33#include <linux/ioport.h>
34#include <linux/slab.h>
35#include <linux/interrupt.h>
36#include <linux/netdevice.h>
37#include <linux/etherdevice.h>
38#include <linux/skbuff.h>
39#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/bitops.h>
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010041#include <linux/err.h>
42#include <linux/ethtool.h>
43#include <linux/mii.h>
44#include <linux/phy.h>
45#include <linux/platform_device.h>
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/cache.h>
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010048#include <asm/io.h>
49#include <asm/processor.h> /* Processor type for cache alignment. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051/* Operational parameters that usually are not changed. */
52
53#define CONFIG_SBMAC_COALESCE
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055/* Time in jiffies before concluding the transmitter is hung. */
56#define TX_TIMEOUT (2*HZ)
57
58
59MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)");
60MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver");
61
62/* A few user-configurable values which may be modified when a driver
63 module is loaded. */
64
65/* 1 normal messages, 0 quiet .. 7 verbose. */
66static int debug = 1;
67module_param(debug, int, S_IRUGO);
68MODULE_PARM_DESC(debug, "Debug messages");
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#ifdef CONFIG_SBMAC_COALESCE
Mark Mason693aa942007-04-26 00:23:22 -070071static int int_pktcnt_tx = 255;
72module_param(int_pktcnt_tx, int, S_IRUGO);
73MODULE_PARM_DESC(int_pktcnt_tx, "TX packet count");
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Mark Mason693aa942007-04-26 00:23:22 -070075static int int_timeout_tx = 255;
76module_param(int_timeout_tx, int, S_IRUGO);
77MODULE_PARM_DESC(int_timeout_tx, "TX timeout value");
78
79static int int_pktcnt_rx = 64;
80module_param(int_pktcnt_rx, int, S_IRUGO);
81MODULE_PARM_DESC(int_pktcnt_rx, "RX packet count");
82
83static int int_timeout_rx = 64;
84module_param(int_timeout_rx, int, S_IRUGO);
85MODULE_PARM_DESC(int_timeout_rx, "RX timeout value");
Linus Torvalds1da177e2005-04-16 15:20:36 -070086#endif
87
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010088#include <asm/sibyte/board.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070089#include <asm/sibyte/sb1250.h>
Ralf Baechlef90fdc32006-02-08 23:23:26 +000090#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
91#include <asm/sibyte/bcm1480_regs.h>
92#include <asm/sibyte/bcm1480_int.h>
Mark Mason693aa942007-04-26 00:23:22 -070093#define R_MAC_DMA_OODPKTLOST_RX R_MAC_DMA_OODPKTLOST
Ralf Baechlef90fdc32006-02-08 23:23:26 +000094#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#include <asm/sibyte/sb1250_regs.h>
Ralf Baechlef90fdc32006-02-08 23:23:26 +000096#include <asm/sibyte/sb1250_int.h>
97#else
98#error invalid SiByte MAC configuation
99#endif
100#include <asm/sibyte/sb1250_scd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#include <asm/sibyte/sb1250_mac.h>
102#include <asm/sibyte/sb1250_dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Ralf Baechlef90fdc32006-02-08 23:23:26 +0000104#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
105#define UNIT_INT(n) (K_BCM1480_INT_MAC_0 + ((n) * 2))
106#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
107#define UNIT_INT(n) (K_INT_MAC_0 + (n))
108#else
109#error invalid SiByte MAC configuation
110#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100112#ifdef K_INT_PHY
113#define SBMAC_PHY_INT K_INT_PHY
114#else
115#define SBMAC_PHY_INT PHY_POLL
116#endif
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118/**********************************************************************
119 * Simple types
120 ********************************************************************* */
121
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100122enum sbmac_speed {
123 sbmac_speed_none = 0,
124 sbmac_speed_10 = SPEED_10,
125 sbmac_speed_100 = SPEED_100,
126 sbmac_speed_1000 = SPEED_1000,
127};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100129enum sbmac_duplex {
130 sbmac_duplex_none = -1,
131 sbmac_duplex_half = DUPLEX_HALF,
132 sbmac_duplex_full = DUPLEX_FULL,
133};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100135enum sbmac_fc {
136 sbmac_fc_none,
137 sbmac_fc_disabled,
138 sbmac_fc_frame,
139 sbmac_fc_collision,
140 sbmac_fc_carrier,
141};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100143enum sbmac_state {
144 sbmac_state_uninit,
145 sbmac_state_off,
146 sbmac_state_on,
147 sbmac_state_broken,
148};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150
151/**********************************************************************
152 * Macros
153 ********************************************************************* */
154
155
156#define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \
157 (d)->sbdma_dscrtable : (d)->f+1)
158
159
160#define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES)
161
Mark Mason693aa942007-04-26 00:23:22 -0700162#define SBMAC_MAX_TXDESCR 256
163#define SBMAC_MAX_RXDESCR 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Stephen Hemminger789585e2008-05-18 04:45:09 +0100165#define ETHER_ADDR_LEN 6
Ralf Baechle74b02472005-10-19 15:40:02 +0100166#define ENET_PACKET_SIZE 1518
167/*#define ENET_PACKET_SIZE 9216 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169/**********************************************************************
170 * DMA Descriptor structure
171 ********************************************************************* */
172
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100173struct sbdmadscr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 uint64_t dscr_a;
175 uint64_t dscr_b;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100176};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178/**********************************************************************
179 * DMA Controller structure
180 ********************************************************************* */
181
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100182struct sbmacdma {
Ralf Baechle74b02472005-10-19 15:40:02 +0100183
184 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 * This stuff is used to identify the channel and the registers
186 * associated with it.
187 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100188 struct sbmac_softc *sbdma_eth; /* back pointer to associated
189 MAC */
190 int sbdma_channel; /* channel number */
191 int sbdma_txdir; /* direction (1=transmit) */
192 int sbdma_maxdescr; /* total # of descriptors
193 in ring */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194#ifdef CONFIG_SBMAC_COALESCE
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100195 int sbdma_int_pktcnt;
196 /* # descriptors rx/tx
197 before interrupt */
198 int sbdma_int_timeout;
199 /* # usec rx/tx interrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200#endif
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100201 void __iomem *sbdma_config0; /* DMA config register 0 */
202 void __iomem *sbdma_config1; /* DMA config register 1 */
203 void __iomem *sbdma_dscrbase;
204 /* descriptor base address */
205 void __iomem *sbdma_dscrcnt; /* descriptor count register */
206 void __iomem *sbdma_curdscr; /* current descriptor
207 address */
208 void __iomem *sbdma_oodpktlost;
209 /* pkt drop (rx only) */
Ralf Baechle74b02472005-10-19 15:40:02 +0100210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /*
212 * This stuff is for maintenance of the ring
213 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100214 void *sbdma_dscrtable_unaligned;
215 struct sbdmadscr *sbdma_dscrtable;
216 /* base of descriptor table */
217 struct sbdmadscr *sbdma_dscrtable_end;
218 /* end of descriptor table */
219 struct sk_buff **sbdma_ctxtable;
220 /* context table, one
221 per descr */
222 dma_addr_t sbdma_dscrtable_phys;
223 /* and also the phys addr */
224 struct sbdmadscr *sbdma_addptr; /* next dscr for sw to add */
225 struct sbdmadscr *sbdma_remptr; /* next dscr for sw
226 to remove */
227};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229
230/**********************************************************************
231 * Ethernet softc structure
232 ********************************************************************* */
233
234struct sbmac_softc {
Ralf Baechle74b02472005-10-19 15:40:02 +0100235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 /*
237 * Linux-specific things
238 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100239 struct net_device *sbm_dev; /* pointer to linux device */
240 struct napi_struct napi;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100241 struct phy_device *phy_dev; /* the associated PHY device */
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700242 struct mii_bus *mii_bus; /* the MII bus */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100243 int phy_irq[PHY_MAX_ADDR];
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100244 spinlock_t sbm_lock; /* spin lock */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100245 int sbm_devflags; /* current device flags */
Ralf Baechle74b02472005-10-19 15:40:02 +0100246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 /*
248 * Controller-specific things
249 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100250 void __iomem *sbm_base; /* MAC's base address */
251 enum sbmac_state sbm_state; /* current state */
Ralf Baechle74b02472005-10-19 15:40:02 +0100252
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100253 void __iomem *sbm_macenable; /* MAC Enable Register */
254 void __iomem *sbm_maccfg; /* MAC Config Register */
255 void __iomem *sbm_fifocfg; /* FIFO Config Register */
256 void __iomem *sbm_framecfg; /* Frame Config Register */
257 void __iomem *sbm_rxfilter; /* Receive Filter Register */
258 void __iomem *sbm_isr; /* Interrupt Status Register */
259 void __iomem *sbm_imr; /* Interrupt Mask Register */
260 void __iomem *sbm_mdio; /* MDIO Register */
Ralf Baechle74b02472005-10-19 15:40:02 +0100261
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100262 enum sbmac_speed sbm_speed; /* current speed */
263 enum sbmac_duplex sbm_duplex; /* current duplex */
264 enum sbmac_fc sbm_fc; /* cur. flow control setting */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100265 int sbm_pause; /* current pause setting */
266 int sbm_link; /* current link state */
Ralf Baechle74b02472005-10-19 15:40:02 +0100267
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100268 unsigned char sbm_hwaddr[ETHER_ADDR_LEN];
Ralf Baechle74b02472005-10-19 15:40:02 +0100269
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100270 struct sbmacdma sbm_txdma; /* only channel 0 for now */
271 struct sbmacdma sbm_rxdma;
272 int rx_hw_checksum;
273 int sbe_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274};
275
276
277/**********************************************************************
278 * Externs
279 ********************************************************************* */
280
281/**********************************************************************
282 * Prototypes
283 ********************************************************************* */
284
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100285static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
286 int txrx, int maxdescr);
287static void sbdma_channel_start(struct sbmacdma *d, int rxtx);
Stephen Hemminger789585e2008-05-18 04:45:09 +0100288static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
289 struct sk_buff *m);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100290static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *m);
291static void sbdma_emptyring(struct sbmacdma *d);
Stephen Hemminger789585e2008-05-18 04:45:09 +0100292static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100293static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
294 int work_to_do, int poll);
295static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
296 int poll);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297static int sbmac_initctx(struct sbmac_softc *s);
298static void sbmac_channel_start(struct sbmac_softc *s);
299static void sbmac_channel_stop(struct sbmac_softc *s);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100300static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *,
301 enum sbmac_state);
302static void sbmac_promiscuous_mode(struct sbmac_softc *sc, int onoff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303static uint64_t sbmac_addr2reg(unsigned char *ptr);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100304static irqreturn_t sbmac_intr(int irq, void *dev_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev);
306static void sbmac_setmulti(struct sbmac_softc *sc);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100307static int sbmac_init(struct platform_device *pldev, long long base);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100308static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed);
309static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
310 enum sbmac_fc fc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312static int sbmac_open(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313static void sbmac_tx_timeout (struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314static void sbmac_set_rx_mode(struct net_device *dev);
315static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
316static int sbmac_close(struct net_device *dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700317static int sbmac_poll(struct napi_struct *napi, int budget);
Mark Mason693aa942007-04-26 00:23:22 -0700318
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100319static void sbmac_mii_poll(struct net_device *dev);
Ralf Baechle59b81822005-10-20 12:01:28 +0100320static int sbmac_mii_probe(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100322static void sbmac_mii_sync(void __iomem *sbm_mdio);
323static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100324 int bitcnt);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100325static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx);
326static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
327 u16 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329
330/**********************************************************************
331 * Globals
332 ********************************************************************* */
333
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100334static char sbmac_string[] = "sb1250-mac";
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100335
336static char sbmac_mdio_string[] = "sb1250-mac-mdio";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338
339/**********************************************************************
340 * MDIO constants
341 ********************************************************************* */
342
343#define MII_COMMAND_START 0x01
344#define MII_COMMAND_READ 0x02
345#define MII_COMMAND_WRITE 0x01
346#define MII_COMMAND_ACK 0x02
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348#define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */
349
350#define ENABLE 1
351#define DISABLE 0
352
353/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100354 * SBMAC_MII_SYNC(sbm_mdio)
Ralf Baechle74b02472005-10-19 15:40:02 +0100355 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 * Synchronize with the MII - send a pattern of bits to the MII
357 * that will guarantee that it is ready to accept a command.
Ralf Baechle74b02472005-10-19 15:40:02 +0100358 *
359 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100360 * sbm_mdio - address of the MAC's MDIO register
Ralf Baechle74b02472005-10-19 15:40:02 +0100361 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 * Return value:
363 * nothing
364 ********************************************************************* */
365
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100366static void sbmac_mii_sync(void __iomem *sbm_mdio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367{
368 int cnt;
369 uint64_t bits;
370 int mac_mdio_genc;
371
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100372 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Ralf Baechle74b02472005-10-19 15:40:02 +0100373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT;
Ralf Baechle74b02472005-10-19 15:40:02 +0100375
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100376 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 for (cnt = 0; cnt < 32; cnt++) {
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100379 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
380 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 }
382}
383
384/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100385 * SBMAC_MII_SENDDATA(sbm_mdio, data, bitcnt)
Ralf Baechle74b02472005-10-19 15:40:02 +0100386 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 * Send some bits to the MII. The bits to be sent are right-
388 * justified in the 'data' parameter.
Ralf Baechle74b02472005-10-19 15:40:02 +0100389 *
390 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100391 * sbm_mdio - address of the MAC's MDIO register
392 * data - data to send
393 * bitcnt - number of bits to send
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 ********************************************************************* */
395
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100396static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
397 int bitcnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{
399 int i;
400 uint64_t bits;
401 unsigned int curmask;
402 int mac_mdio_genc;
403
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100404 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Ralf Baechle74b02472005-10-19 15:40:02 +0100405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 bits = M_MAC_MDIO_DIR_OUTPUT;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100407 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 curmask = 1 << (bitcnt - 1);
Ralf Baechle74b02472005-10-19 15:40:02 +0100410
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 for (i = 0; i < bitcnt; i++) {
412 if (data & curmask)
413 bits |= M_MAC_MDIO_OUT;
414 else bits &= ~M_MAC_MDIO_OUT;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100415 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
416 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
417 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 curmask >>= 1;
419 }
420}
421
422
423
424/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100425 * SBMAC_MII_READ(bus, phyaddr, regidx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 * Read a PHY register.
Ralf Baechle74b02472005-10-19 15:40:02 +0100427 *
428 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100429 * bus - MDIO bus handle
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 * phyaddr - PHY's address
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100431 * regnum - index of register to read
Ralf Baechle74b02472005-10-19 15:40:02 +0100432 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 * Return value:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100434 * value read, or 0xffff if an error occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 ********************************************************************* */
436
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100437static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100439 struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
440 void __iomem *sbm_mdio = sc->sbm_mdio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 int idx;
442 int error;
443 int regval;
444 int mac_mdio_genc;
445
446 /*
447 * Synchronize ourselves so that the PHY knows the next
448 * thing coming down is a command
449 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100450 sbmac_mii_sync(sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 /*
453 * Send the data to the PHY. The sequence is
454 * a "start" command (2 bits)
455 * a "read" command (2 bits)
456 * the PHY addr (5 bits)
457 * the register index (5 bits)
458 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100459 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
460 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_READ, 2);
461 sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
462 sbmac_mii_senddata(sbm_mdio, regidx, 5);
Ralf Baechle74b02472005-10-19 15:40:02 +0100463
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100464 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Ralf Baechle74b02472005-10-19 15:40:02 +0100465
466 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 * Switch the port around without a clock transition.
468 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100469 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 /*
472 * Send out a clock pulse to signal we want the status
473 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100474 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
475 sbm_mdio);
476 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100477
478 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 * If an error occurred, the PHY will signal '1' back
480 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100481 error = __raw_readq(sbm_mdio) & M_MAC_MDIO_IN;
Ralf Baechle74b02472005-10-19 15:40:02 +0100482
483 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 * Issue an 'idle' clock pulse, but keep the direction
485 * the same.
486 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100487 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
488 sbm_mdio);
489 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100490
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 regval = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +0100492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 for (idx = 0; idx < 16; idx++) {
494 regval <<= 1;
Ralf Baechle74b02472005-10-19 15:40:02 +0100495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 if (error == 0) {
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100497 if (__raw_readq(sbm_mdio) & M_MAC_MDIO_IN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 regval |= 1;
499 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100500
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100501 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
502 sbm_mdio);
503 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 /* Switch back to output */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100507 __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if (error == 0)
510 return regval;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100511 return 0xffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512}
513
514
515/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100516 * SBMAC_MII_WRITE(bus, phyaddr, regidx, regval)
Ralf Baechle74b02472005-10-19 15:40:02 +0100517 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 * Write a value to a PHY register.
Ralf Baechle74b02472005-10-19 15:40:02 +0100519 *
520 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100521 * bus - MDIO bus handle
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 * phyaddr - PHY to use
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100523 * regidx - register within the PHY
524 * regval - data to write to register
Ralf Baechle74b02472005-10-19 15:40:02 +0100525 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 * Return value:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100527 * 0 for success
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 ********************************************************************* */
529
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100530static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
531 u16 regval)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100533 struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
534 void __iomem *sbm_mdio = sc->sbm_mdio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 int mac_mdio_genc;
536
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100537 sbmac_mii_sync(sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100538
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100539 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
540 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_WRITE, 2);
541 sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
542 sbmac_mii_senddata(sbm_mdio, regidx, 5);
543 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_ACK, 2);
544 sbmac_mii_senddata(sbm_mdio, regval, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100546 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100548 __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
549
550 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551}
552
553
554
555/**********************************************************************
556 * SBDMA_INITCTX(d,s,chan,txrx,maxdescr)
Ralf Baechle74b02472005-10-19 15:40:02 +0100557 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 * Initialize a DMA channel context. Since there are potentially
559 * eight DMA channels per MAC, it's nice to do this in a standard
Ralf Baechle74b02472005-10-19 15:40:02 +0100560 * way.
561 *
562 * Input parameters:
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100563 * d - struct sbmacdma (DMA channel context)
564 * s - struct sbmac_softc (pointer to a MAC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 * chan - channel number (0..1 right now)
566 * txrx - Identifies DMA_TX or DMA_RX for channel direction
567 * maxdescr - number of descriptors
Ralf Baechle74b02472005-10-19 15:40:02 +0100568 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 * Return value:
570 * nothing
571 ********************************************************************* */
572
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100573static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
574 int txrx, int maxdescr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
Mark Mason693aa942007-04-26 00:23:22 -0700576#ifdef CONFIG_SBMAC_COALESCE
577 int int_pktcnt, int_timeout;
578#endif
579
Ralf Baechle74b02472005-10-19 15:40:02 +0100580 /*
581 * Save away interesting stuff in the structure
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100583
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 d->sbdma_eth = s;
585 d->sbdma_channel = chan;
586 d->sbdma_txdir = txrx;
Ralf Baechle74b02472005-10-19 15:40:02 +0100587
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588#if 0
589 /* RMON clearing */
590 s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING;
591#endif
592
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100593 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BYTES);
594 __raw_writeq(0, s->sbm_base + R_MAC_RMON_COLLISIONS);
595 __raw_writeq(0, s->sbm_base + R_MAC_RMON_LATE_COL);
596 __raw_writeq(0, s->sbm_base + R_MAC_RMON_EX_COL);
597 __raw_writeq(0, s->sbm_base + R_MAC_RMON_FCS_ERROR);
598 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_ABORT);
599 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BAD);
600 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_GOOD);
601 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_RUNT);
602 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_OVERSIZE);
603 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BYTES);
604 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_MCAST);
605 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BCAST);
606 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BAD);
607 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_GOOD);
608 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_RUNT);
609 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_OVERSIZE);
610 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_FCS_ERROR);
611 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_LENGTH_ERROR);
612 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_CODE_ERROR);
613 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_ALIGN_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
Ralf Baechle74b02472005-10-19 15:40:02 +0100615 /*
616 * initialize register pointers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100618
619 d->sbdma_config0 =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0);
Ralf Baechle74b02472005-10-19 15:40:02 +0100621 d->sbdma_config1 =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1);
Ralf Baechle74b02472005-10-19 15:40:02 +0100623 d->sbdma_dscrbase =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE);
Ralf Baechle74b02472005-10-19 15:40:02 +0100625 d->sbdma_dscrcnt =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT);
Ralf Baechle74b02472005-10-19 15:40:02 +0100627 d->sbdma_curdscr =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR);
Mark Mason693aa942007-04-26 00:23:22 -0700629 if (d->sbdma_txdir)
630 d->sbdma_oodpktlost = NULL;
631 else
632 d->sbdma_oodpktlost =
633 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_OODPKTLOST_RX);
Ralf Baechle74b02472005-10-19 15:40:02 +0100634
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 /*
636 * Allocate memory for the ring
637 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 d->sbdma_maxdescr = maxdescr;
Ralf Baechle74b02472005-10-19 15:40:02 +0100640
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100641 d->sbdma_dscrtable_unaligned = kcalloc(d->sbdma_maxdescr + 1,
642 sizeof(*d->sbdma_dscrtable),
643 GFP_KERNEL);
Ralf Baechle04115de2005-10-10 14:50:36 +0100644
645 /*
646 * The descriptor table must be aligned to at least 16 bytes or the
647 * MAC will corrupt it.
648 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100649 d->sbdma_dscrtable = (struct sbdmadscr *)
650 ALIGN((unsigned long)d->sbdma_dscrtable_unaligned,
651 sizeof(*d->sbdma_dscrtable));
Ralf Baechle74b02472005-10-19 15:40:02 +0100652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr;
Ralf Baechle74b02472005-10-19 15:40:02 +0100654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable);
Ralf Baechle74b02472005-10-19 15:40:02 +0100656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 /*
658 * And context table
659 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100660
Mariusz Kozlowskic477f332007-07-31 23:58:36 +0200661 d->sbdma_ctxtable = kcalloc(d->sbdma_maxdescr,
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100662 sizeof(*d->sbdma_ctxtable), GFP_KERNEL);
Ralf Baechle74b02472005-10-19 15:40:02 +0100663
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664#ifdef CONFIG_SBMAC_COALESCE
665 /*
666 * Setup Rx/Tx DMA coalescing defaults
667 */
668
Mark Mason693aa942007-04-26 00:23:22 -0700669 int_pktcnt = (txrx == DMA_TX) ? int_pktcnt_tx : int_pktcnt_rx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 if ( int_pktcnt ) {
671 d->sbdma_int_pktcnt = int_pktcnt;
672 } else {
673 d->sbdma_int_pktcnt = 1;
674 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100675
Mark Mason693aa942007-04-26 00:23:22 -0700676 int_timeout = (txrx == DMA_TX) ? int_timeout_tx : int_timeout_rx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 if ( int_timeout ) {
678 d->sbdma_int_timeout = int_timeout;
679 } else {
680 d->sbdma_int_timeout = 0;
681 }
682#endif
683
684}
685
686/**********************************************************************
687 * SBDMA_CHANNEL_START(d)
Ralf Baechle74b02472005-10-19 15:40:02 +0100688 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 * Initialize the hardware registers for a DMA channel.
Ralf Baechle74b02472005-10-19 15:40:02 +0100690 *
691 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 * d - DMA channel to init (context must be previously init'd
693 * rxtx - DMA_RX or DMA_TX depending on what type of channel
Ralf Baechle74b02472005-10-19 15:40:02 +0100694 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 * Return value:
696 * nothing
697 ********************************************************************* */
698
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100699static void sbdma_channel_start(struct sbmacdma *d, int rxtx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700{
701 /*
702 * Turn on the DMA channel
703 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705#ifdef CONFIG_SBMAC_COALESCE
Ralf Baechle20399732005-10-19 15:39:05 +0100706 __raw_writeq(V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) |
707 0, d->sbdma_config1);
708 __raw_writeq(M_DMA_EOP_INT_EN |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 V_DMA_RINGSZ(d->sbdma_maxdescr) |
710 V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) |
Ralf Baechle20399732005-10-19 15:39:05 +0100711 0, d->sbdma_config0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712#else
Ralf Baechle20399732005-10-19 15:39:05 +0100713 __raw_writeq(0, d->sbdma_config1);
714 __raw_writeq(V_DMA_RINGSZ(d->sbdma_maxdescr) |
715 0, d->sbdma_config0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716#endif
717
Ralf Baechle20399732005-10-19 15:39:05 +0100718 __raw_writeq(d->sbdma_dscrtable_phys, d->sbdma_dscrbase);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
720 /*
721 * Initialize ring pointers
722 */
723
724 d->sbdma_addptr = d->sbdma_dscrtable;
725 d->sbdma_remptr = d->sbdma_dscrtable;
726}
727
728/**********************************************************************
729 * SBDMA_CHANNEL_STOP(d)
Ralf Baechle74b02472005-10-19 15:40:02 +0100730 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 * Initialize the hardware registers for a DMA channel.
Ralf Baechle74b02472005-10-19 15:40:02 +0100732 *
733 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 * d - DMA channel to init (context must be previously init'd
Ralf Baechle74b02472005-10-19 15:40:02 +0100735 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 * Return value:
737 * nothing
738 ********************************************************************* */
739
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100740static void sbdma_channel_stop(struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741{
742 /*
743 * Turn off the DMA channel
744 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100745
Ralf Baechle20399732005-10-19 15:39:05 +0100746 __raw_writeq(0, d->sbdma_config1);
Ralf Baechle74b02472005-10-19 15:40:02 +0100747
Ralf Baechle20399732005-10-19 15:39:05 +0100748 __raw_writeq(0, d->sbdma_dscrbase);
Ralf Baechle74b02472005-10-19 15:40:02 +0100749
Ralf Baechle20399732005-10-19 15:39:05 +0100750 __raw_writeq(0, d->sbdma_config0);
Ralf Baechle74b02472005-10-19 15:40:02 +0100751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 /*
753 * Zero ring pointers
754 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100755
Ralf Baechle20399732005-10-19 15:39:05 +0100756 d->sbdma_addptr = NULL;
757 d->sbdma_remptr = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758}
759
Stephen Hemminger789585e2008-05-18 04:45:09 +0100760static inline void sbdma_align_skb(struct sk_buff *skb,
761 unsigned int power2, unsigned int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762{
Stephen Hemminger789585e2008-05-18 04:45:09 +0100763 unsigned char *addr = skb->data;
764 unsigned char *newaddr = PTR_ALIGN(addr, power2);
Ralf Baechle74b02472005-10-19 15:40:02 +0100765
Stephen Hemminger789585e2008-05-18 04:45:09 +0100766 skb_reserve(skb, newaddr - addr + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767}
768
769
770/**********************************************************************
771 * SBDMA_ADD_RCVBUFFER(d,sb)
Ralf Baechle74b02472005-10-19 15:40:02 +0100772 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 * Add a buffer to the specified DMA channel. For receive channels,
774 * this queues a buffer for inbound packets.
Ralf Baechle74b02472005-10-19 15:40:02 +0100775 *
776 * Input parameters:
Stephen Hemminger789585e2008-05-18 04:45:09 +0100777 * sc - softc structure
778 * d - DMA channel descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 * sb - sk_buff to add, or NULL if we should allocate one
Ralf Baechle74b02472005-10-19 15:40:02 +0100780 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 * Return value:
782 * 0 if buffer could not be added (ring is full)
783 * 1 if buffer added successfully
784 ********************************************************************* */
785
786
Stephen Hemminger789585e2008-05-18 04:45:09 +0100787static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
788 struct sk_buff *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789{
Stephen Hemminger789585e2008-05-18 04:45:09 +0100790 struct net_device *dev = sc->sbm_dev;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100791 struct sbdmadscr *dsc;
792 struct sbdmadscr *nextdsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 struct sk_buff *sb_new = NULL;
794 int pktsize = ENET_PACKET_SIZE;
Ralf Baechle74b02472005-10-19 15:40:02 +0100795
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 /* get pointer to our current place in the ring */
Ralf Baechle74b02472005-10-19 15:40:02 +0100797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 dsc = d->sbdma_addptr;
799 nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
Ralf Baechle74b02472005-10-19 15:40:02 +0100800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 /*
802 * figure out if the ring is full - if the next descriptor
803 * is the same as the one that we're going to remove from
804 * the ring, the ring is full
805 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 if (nextdsc == d->sbdma_remptr) {
808 return -ENOSPC;
809 }
810
Ralf Baechle74b02472005-10-19 15:40:02 +0100811 /*
812 * Allocate a sk_buff if we don't already have one.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 * If we do have an sk_buff, reset it so that it's empty.
814 *
815 * Note: sk_buffs don't seem to be guaranteed to have any sort
816 * of alignment when they are allocated. Therefore, allocate enough
817 * extra space to make sure that:
818 *
819 * 1. the data does not start in the middle of a cache line.
820 * 2. The data does not end in the middle of a cache line
Ralf Baechle74b02472005-10-19 15:40:02 +0100821 * 3. The buffer can be aligned such that the IP addresses are
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 * naturally aligned.
823 *
824 * Remember, the SOCs MAC writes whole cache lines at a time,
825 * without reading the old contents first. So, if the sk_buff's
826 * data portion starts in the middle of a cache line, the SOC
827 * DMA will trash the beginning (and ending) portions.
828 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 if (sb == NULL) {
Stephen Hemminger789585e2008-05-18 04:45:09 +0100831 sb_new = netdev_alloc_skb(dev, ENET_PACKET_SIZE +
832 SMP_CACHE_BYTES * 2 +
833 NET_IP_ALIGN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 if (sb_new == NULL) {
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100835 pr_info("%s: sk_buff allocation failed\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 d->sbdma_eth->sbm_dev->name);
837 return -ENOBUFS;
838 }
839
Stephen Hemminger789585e2008-05-18 04:45:09 +0100840 sbdma_align_skb(sb_new, SMP_CACHE_BYTES, NET_IP_ALIGN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 }
842 else {
843 sb_new = sb;
Ralf Baechle74b02472005-10-19 15:40:02 +0100844 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 * nothing special to reinit buffer, it's already aligned
846 * and sb->data already points to a good place.
847 */
848 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 /*
Ralf Baechle74b02472005-10-19 15:40:02 +0100851 * fill in the descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100853
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854#ifdef CONFIG_SBMAC_COALESCE
855 /*
856 * Do not interrupt per DMA transfer.
857 */
David S. Miller689be432005-06-28 15:25:31 -0700858 dsc->dscr_a = virt_to_phys(sb_new->data) |
Stephen Hemminger789585e2008-05-18 04:45:09 +0100859 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) | 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860#else
David S. Miller689be432005-06-28 15:25:31 -0700861 dsc->dscr_a = virt_to_phys(sb_new->data) |
Stephen Hemminger789585e2008-05-18 04:45:09 +0100862 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 M_DMA_DSCRA_INTERRUPT;
864#endif
865
866 /* receiving: no options */
867 dsc->dscr_b = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +0100868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 /*
Ralf Baechle74b02472005-10-19 15:40:02 +0100870 * fill in the context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new;
Ralf Baechle74b02472005-10-19 15:40:02 +0100874
875 /*
876 * point at next packet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100878
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 d->sbdma_addptr = nextdsc;
Ralf Baechle74b02472005-10-19 15:40:02 +0100880
881 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 * Give the buffer to the DMA engine.
883 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100884
Ralf Baechle20399732005-10-19 15:39:05 +0100885 __raw_writeq(1, d->sbdma_dscrcnt);
Ralf Baechle74b02472005-10-19 15:40:02 +0100886
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 return 0; /* we did it */
888}
889
890/**********************************************************************
891 * SBDMA_ADD_TXBUFFER(d,sb)
Ralf Baechle74b02472005-10-19 15:40:02 +0100892 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 * Add a transmit buffer to the specified DMA channel, causing a
894 * transmit to start.
Ralf Baechle74b02472005-10-19 15:40:02 +0100895 *
896 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 * d - DMA channel descriptor
898 * sb - sk_buff to add
Ralf Baechle74b02472005-10-19 15:40:02 +0100899 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 * Return value:
901 * 0 transmit queued successfully
902 * otherwise error code
903 ********************************************************************* */
904
905
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100906static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907{
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100908 struct sbdmadscr *dsc;
909 struct sbdmadscr *nextdsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 uint64_t phys;
911 uint64_t ncb;
912 int length;
Ralf Baechle74b02472005-10-19 15:40:02 +0100913
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 /* get pointer to our current place in the ring */
Ralf Baechle74b02472005-10-19 15:40:02 +0100915
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 dsc = d->sbdma_addptr;
917 nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
Ralf Baechle74b02472005-10-19 15:40:02 +0100918
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 /*
920 * figure out if the ring is full - if the next descriptor
921 * is the same as the one that we're going to remove from
922 * the ring, the ring is full
923 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100924
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 if (nextdsc == d->sbdma_remptr) {
926 return -ENOSPC;
927 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 /*
930 * Under Linux, it's not necessary to copy/coalesce buffers
931 * like it is on NetBSD. We think they're all contiguous,
932 * but that may not be true for GBE.
933 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 length = sb->len;
Ralf Baechle74b02472005-10-19 15:40:02 +0100936
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 /*
938 * fill in the descriptor. Note that the number of cache
939 * blocks in the descriptor is the number of blocks
940 * *spanned*, so we need to add in the offset (if any)
941 * while doing the calculation.
942 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100943
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 phys = virt_to_phys(sb->data);
945 ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1)));
946
Ralf Baechle74b02472005-10-19 15:40:02 +0100947 dsc->dscr_a = phys |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 V_DMA_DSCRA_A_SIZE(ncb) |
949#ifndef CONFIG_SBMAC_COALESCE
950 M_DMA_DSCRA_INTERRUPT |
951#endif
952 M_DMA_ETHTX_SOP;
Ralf Baechle74b02472005-10-19 15:40:02 +0100953
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 /* transmitting: set outbound options and length */
955
956 dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) |
957 V_DMA_DSCRB_PKT_SIZE(length);
Ralf Baechle74b02472005-10-19 15:40:02 +0100958
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 /*
Ralf Baechle74b02472005-10-19 15:40:02 +0100960 * fill in the context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100962
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb;
Ralf Baechle74b02472005-10-19 15:40:02 +0100964
965 /*
966 * point at next packet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100968
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 d->sbdma_addptr = nextdsc;
Ralf Baechle74b02472005-10-19 15:40:02 +0100970
971 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 * Give the buffer to the DMA engine.
973 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100974
Ralf Baechle20399732005-10-19 15:39:05 +0100975 __raw_writeq(1, d->sbdma_dscrcnt);
Ralf Baechle74b02472005-10-19 15:40:02 +0100976
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 return 0; /* we did it */
978}
979
980
981
982
983/**********************************************************************
984 * SBDMA_EMPTYRING(d)
Ralf Baechle74b02472005-10-19 15:40:02 +0100985 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 * Free all allocated sk_buffs on the specified DMA channel;
Ralf Baechle74b02472005-10-19 15:40:02 +0100987 *
988 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 * d - DMA channel
Ralf Baechle74b02472005-10-19 15:40:02 +0100990 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 * Return value:
992 * nothing
993 ********************************************************************* */
994
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100995static void sbdma_emptyring(struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996{
997 int idx;
998 struct sk_buff *sb;
Ralf Baechle74b02472005-10-19 15:40:02 +0100999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 for (idx = 0; idx < d->sbdma_maxdescr; idx++) {
1001 sb = d->sbdma_ctxtable[idx];
1002 if (sb) {
1003 dev_kfree_skb(sb);
1004 d->sbdma_ctxtable[idx] = NULL;
1005 }
1006 }
1007}
1008
1009
1010/**********************************************************************
1011 * SBDMA_FILLRING(d)
Ralf Baechle74b02472005-10-19 15:40:02 +01001012 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 * Fill the specified DMA channel (must be receive channel)
1014 * with sk_buffs
Ralf Baechle74b02472005-10-19 15:40:02 +01001015 *
1016 * Input parameters:
Stephen Hemminger789585e2008-05-18 04:45:09 +01001017 * sc - softc structure
1018 * d - DMA channel
Ralf Baechle74b02472005-10-19 15:40:02 +01001019 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 * Return value:
1021 * nothing
1022 ********************************************************************* */
1023
Stephen Hemminger789585e2008-05-18 04:45:09 +01001024static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025{
1026 int idx;
Ralf Baechle74b02472005-10-19 15:40:02 +01001027
Stephen Hemminger789585e2008-05-18 04:45:09 +01001028 for (idx = 0; idx < SBMAC_MAX_RXDESCR - 1; idx++) {
1029 if (sbdma_add_rcvbuffer(sc, d, NULL) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 break;
1031 }
1032}
1033
Deepak Saxenad6830012007-03-19 15:43:11 -07001034#ifdef CONFIG_NET_POLL_CONTROLLER
1035static void sbmac_netpoll(struct net_device *netdev)
1036{
1037 struct sbmac_softc *sc = netdev_priv(netdev);
1038 int irq = sc->sbm_dev->irq;
1039
1040 __raw_writeq(0, sc->sbm_imr);
1041
Yoann Padioleau0da2f0f2007-07-06 02:39:56 -07001042 sbmac_intr(irq, netdev);
Deepak Saxenad6830012007-03-19 15:43:11 -07001043
1044#ifdef CONFIG_SBMAC_COALESCE
1045 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1046 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
1047 sc->sbm_imr);
1048#else
Jeff Garzik7d2e3cb2008-05-13 01:41:58 -04001049 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
Deepak Saxenad6830012007-03-19 15:43:11 -07001050 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
1051#endif
1052}
1053#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
1055/**********************************************************************
Mark Mason693aa942007-04-26 00:23:22 -07001056 * SBDMA_RX_PROCESS(sc,d,work_to_do,poll)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001058 * Process "completed" receive buffers on the specified DMA channel.
Ralf Baechle74b02472005-10-19 15:40:02 +01001059 *
1060 * Input parameters:
Mark Mason693aa942007-04-26 00:23:22 -07001061 * sc - softc structure
1062 * d - DMA channel context
1063 * work_to_do - no. of packets to process before enabling interrupt
1064 * again (for NAPI)
1065 * poll - 1: using polling (for NAPI)
Ralf Baechle74b02472005-10-19 15:40:02 +01001066 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 * Return value:
1068 * nothing
1069 ********************************************************************* */
1070
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001071static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
1072 int work_to_do, int poll)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073{
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001074 struct net_device *dev = sc->sbm_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 int curidx;
1076 int hwidx;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001077 struct sbdmadscr *dsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 struct sk_buff *sb;
1079 int len;
Mark Mason693aa942007-04-26 00:23:22 -07001080 int work_done = 0;
1081 int dropped = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +01001082
Mark Mason693aa942007-04-26 00:23:22 -07001083 prefetch(d);
1084
1085again:
1086 /* Check if the HW dropped any frames */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001087 dev->stats.rx_fifo_errors
Mark Mason693aa942007-04-26 00:23:22 -07001088 += __raw_readq(sc->sbm_rxdma.sbdma_oodpktlost) & 0xffff;
1089 __raw_writeq(0, sc->sbm_rxdma.sbdma_oodpktlost);
1090
1091 while (work_to_do-- > 0) {
Ralf Baechle74b02472005-10-19 15:40:02 +01001092 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 * figure out where we are (as an index) and where
1094 * the hardware is (also as an index)
1095 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001096 * This could be done faster if (for example) the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 * descriptor table was page-aligned and contiguous in
1098 * both virtual and physical memory -- you could then
1099 * just compare the low-order bits of the virtual address
1100 * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1101 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001102
Mark Mason693aa942007-04-26 00:23:22 -07001103 dsc = d->sbdma_remptr;
1104 curidx = dsc - d->sbdma_dscrtable;
1105
1106 prefetch(dsc);
1107 prefetch(&d->sbdma_ctxtable[curidx]);
1108
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001109 hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1110 d->sbdma_dscrtable_phys) /
1111 sizeof(*d->sbdma_dscrtable);
Ralf Baechle74b02472005-10-19 15:40:02 +01001112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 /*
1114 * If they're the same, that means we've processed all
1115 * of the descriptors up to (but not including) the one that
1116 * the hardware is working on right now.
1117 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 if (curidx == hwidx)
Mark Mason693aa942007-04-26 00:23:22 -07001120 goto done;
Ralf Baechle74b02472005-10-19 15:40:02 +01001121
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 /*
1123 * Otherwise, get the packet's sk_buff ptr back
1124 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001125
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 sb = d->sbdma_ctxtable[curidx];
1127 d->sbdma_ctxtable[curidx] = NULL;
Ralf Baechle74b02472005-10-19 15:40:02 +01001128
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4;
Ralf Baechle74b02472005-10-19 15:40:02 +01001130
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 /*
1132 * Check packet status. If good, process it.
1133 * If not, silently drop it and put it back on the
1134 * receive ring.
1135 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001136
Mark Mason693aa942007-04-26 00:23:22 -07001137 if (likely (!(dsc->dscr_a & M_DMA_ETHRX_BAD))) {
Ralf Baechle74b02472005-10-19 15:40:02 +01001138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 /*
1140 * Add a new buffer to replace the old one. If we fail
1141 * to allocate a buffer, we're going to drop this
1142 * packet and put it right back on the receive ring.
1143 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001144
Stephen Hemminger789585e2008-05-18 04:45:09 +01001145 if (unlikely(sbdma_add_rcvbuffer(sc, d, NULL) ==
1146 -ENOBUFS)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001147 dev->stats.rx_dropped++;
Stephen Hemminger789585e2008-05-18 04:45:09 +01001148 /* Re-add old buffer */
1149 sbdma_add_rcvbuffer(sc, d, sb);
Mark Mason693aa942007-04-26 00:23:22 -07001150 /* No point in continuing at the moment */
1151 printk(KERN_ERR "dropped packet (1)\n");
1152 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1153 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 } else {
1155 /*
1156 * Set length into the packet
1157 */
1158 skb_put(sb,len);
Ralf Baechle74b02472005-10-19 15:40:02 +01001159
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 /*
1161 * Buffer has been replaced on the
1162 * receive ring. Pass the buffer to
1163 * the kernel
1164 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev);
1166 /* Check hw IPv4/TCP checksum if supported */
1167 if (sc->rx_hw_checksum == ENABLE) {
1168 if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) &&
1169 !((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) {
1170 sb->ip_summed = CHECKSUM_UNNECESSARY;
1171 /* don't need to set sb->csum */
1172 } else {
1173 sb->ip_summed = CHECKSUM_NONE;
1174 }
1175 }
Mark Mason693aa942007-04-26 00:23:22 -07001176 prefetch(sb->data);
1177 prefetch((const void *)(((char *)sb->data)+32));
1178 if (poll)
1179 dropped = netif_receive_skb(sb);
1180 else
1181 dropped = netif_rx(sb);
Ralf Baechle74b02472005-10-19 15:40:02 +01001182
Mark Mason693aa942007-04-26 00:23:22 -07001183 if (dropped == NET_RX_DROP) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001184 dev->stats.rx_dropped++;
Mark Mason693aa942007-04-26 00:23:22 -07001185 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1186 goto done;
1187 }
1188 else {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001189 dev->stats.rx_bytes += len;
1190 dev->stats.rx_packets++;
Mark Mason693aa942007-04-26 00:23:22 -07001191 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 }
1193 } else {
1194 /*
1195 * Packet was mangled somehow. Just drop it and
1196 * put it back on the receive ring.
1197 */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001198 dev->stats.rx_errors++;
Stephen Hemminger789585e2008-05-18 04:45:09 +01001199 sbdma_add_rcvbuffer(sc, d, sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001201
1202
1203 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 * .. and advance to the next buffer.
1205 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001206
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
Mark Mason693aa942007-04-26 00:23:22 -07001208 work_done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 }
Mark Mason693aa942007-04-26 00:23:22 -07001210 if (!poll) {
1211 work_to_do = 32;
1212 goto again; /* collect fifo drop statistics again */
1213 }
1214done:
1215 return work_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216}
1217
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218/**********************************************************************
1219 * SBDMA_TX_PROCESS(sc,d)
Ralf Baechle74b02472005-10-19 15:40:02 +01001220 *
1221 * Process "completed" transmit buffers on the specified DMA channel.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 * This is normally called within the interrupt service routine.
1223 * Note that this isn't really ideal for priority channels, since
Ralf Baechle74b02472005-10-19 15:40:02 +01001224 * it processes all of the packets on a given channel before
1225 * returning.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001227 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 * sc - softc structure
Mark Mason693aa942007-04-26 00:23:22 -07001229 * d - DMA channel context
1230 * poll - 1: using polling (for NAPI)
Ralf Baechle74b02472005-10-19 15:40:02 +01001231 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 * Return value:
1233 * nothing
1234 ********************************************************************* */
1235
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001236static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
1237 int poll)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238{
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001239 struct net_device *dev = sc->sbm_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 int curidx;
1241 int hwidx;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001242 struct sbdmadscr *dsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 struct sk_buff *sb;
1244 unsigned long flags;
Mark Mason693aa942007-04-26 00:23:22 -07001245 int packets_handled = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246
1247 spin_lock_irqsave(&(sc->sbm_lock), flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01001248
Mark Mason693aa942007-04-26 00:23:22 -07001249 if (d->sbdma_remptr == d->sbdma_addptr)
1250 goto end_unlock;
1251
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001252 hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1253 d->sbdma_dscrtable_phys) / sizeof(*d->sbdma_dscrtable);
Mark Mason693aa942007-04-26 00:23:22 -07001254
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 for (;;) {
Ralf Baechle74b02472005-10-19 15:40:02 +01001256 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 * figure out where we are (as an index) and where
1258 * the hardware is (also as an index)
1259 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001260 * This could be done faster if (for example) the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 * descriptor table was page-aligned and contiguous in
1262 * both virtual and physical memory -- you could then
1263 * just compare the low-order bits of the virtual address
1264 * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1265 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001266
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 curidx = d->sbdma_remptr - d->sbdma_dscrtable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269 /*
1270 * If they're the same, that means we've processed all
1271 * of the descriptors up to (but not including) the one that
1272 * the hardware is working on right now.
1273 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001274
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 if (curidx == hwidx)
1276 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001277
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 /*
1279 * Otherwise, get the packet's sk_buff ptr back
1280 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001281
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 dsc = &(d->sbdma_dscrtable[curidx]);
1283 sb = d->sbdma_ctxtable[curidx];
1284 d->sbdma_ctxtable[curidx] = NULL;
Ralf Baechle74b02472005-10-19 15:40:02 +01001285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 /*
1287 * Stats
1288 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001289
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001290 dev->stats.tx_bytes += sb->len;
1291 dev->stats.tx_packets++;
Ralf Baechle74b02472005-10-19 15:40:02 +01001292
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 /*
1294 * for transmits, we just free buffers.
1295 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001296
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 dev_kfree_skb_irq(sb);
Ralf Baechle74b02472005-10-19 15:40:02 +01001298
1299 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 * .. and advance to the next buffer.
1301 */
1302
1303 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
Ralf Baechle74b02472005-10-19 15:40:02 +01001304
Mark Mason693aa942007-04-26 00:23:22 -07001305 packets_handled++;
1306
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001308
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 /*
1310 * Decide if we should wake up the protocol or not.
1311 * Other drivers seem to do this when we reach a low
1312 * watermark on the transmit queue.
1313 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001314
Mark Mason693aa942007-04-26 00:23:22 -07001315 if (packets_handled)
1316 netif_wake_queue(d->sbdma_eth->sbm_dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01001317
Mark Mason693aa942007-04-26 00:23:22 -07001318end_unlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 spin_unlock_irqrestore(&(sc->sbm_lock), flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01001320
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321}
1322
1323
1324
1325/**********************************************************************
1326 * SBMAC_INITCTX(s)
Ralf Baechle74b02472005-10-19 15:40:02 +01001327 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 * Initialize an Ethernet context structure - this is called
1329 * once per MAC on the 1250. Memory is allocated here, so don't
1330 * call it again from inside the ioctl routines that bring the
1331 * interface up/down
Ralf Baechle74b02472005-10-19 15:40:02 +01001332 *
1333 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 * s - sbmac context structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001335 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 * Return value:
1337 * 0
1338 ********************************************************************* */
1339
1340static int sbmac_initctx(struct sbmac_softc *s)
1341{
Ralf Baechle74b02472005-10-19 15:40:02 +01001342
1343 /*
1344 * figure out the addresses of some ports
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001346
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 s->sbm_macenable = s->sbm_base + R_MAC_ENABLE;
1348 s->sbm_maccfg = s->sbm_base + R_MAC_CFG;
1349 s->sbm_fifocfg = s->sbm_base + R_MAC_THRSH_CFG;
1350 s->sbm_framecfg = s->sbm_base + R_MAC_FRAMECFG;
1351 s->sbm_rxfilter = s->sbm_base + R_MAC_ADFILTER_CFG;
1352 s->sbm_isr = s->sbm_base + R_MAC_STATUS;
1353 s->sbm_imr = s->sbm_base + R_MAC_INT_MASK;
1354 s->sbm_mdio = s->sbm_base + R_MAC_MDIO;
1355
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 /*
1357 * Initialize the DMA channels. Right now, only one per MAC is used
1358 * Note: Only do this _once_, as it allocates memory from the kernel!
1359 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001360
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR);
1362 sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR);
Ralf Baechle74b02472005-10-19 15:40:02 +01001363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 /*
1365 * initial state is OFF
1366 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001367
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 s->sbm_state = sbmac_state_off;
Ralf Baechle74b02472005-10-19 15:40:02 +01001369
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 return 0;
1371}
1372
1373
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001374static void sbdma_uninitctx(struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375{
Mark Mason693aa942007-04-26 00:23:22 -07001376 if (d->sbdma_dscrtable_unaligned) {
1377 kfree(d->sbdma_dscrtable_unaligned);
1378 d->sbdma_dscrtable_unaligned = d->sbdma_dscrtable = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 if (d->sbdma_ctxtable) {
1382 kfree(d->sbdma_ctxtable);
1383 d->sbdma_ctxtable = NULL;
1384 }
1385}
1386
1387
1388static void sbmac_uninitctx(struct sbmac_softc *sc)
1389{
1390 sbdma_uninitctx(&(sc->sbm_txdma));
1391 sbdma_uninitctx(&(sc->sbm_rxdma));
1392}
1393
1394
1395/**********************************************************************
1396 * SBMAC_CHANNEL_START(s)
Ralf Baechle74b02472005-10-19 15:40:02 +01001397 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 * Start packet processing on this MAC.
Ralf Baechle74b02472005-10-19 15:40:02 +01001399 *
1400 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 * s - sbmac structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001402 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 * Return value:
1404 * nothing
1405 ********************************************************************* */
1406
1407static void sbmac_channel_start(struct sbmac_softc *s)
1408{
1409 uint64_t reg;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001410 void __iomem *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 uint64_t cfg,fifo,framecfg;
1412 int idx, th_value;
Ralf Baechle74b02472005-10-19 15:40:02 +01001413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 /*
1415 * Don't do this if running
1416 */
1417
1418 if (s->sbm_state == sbmac_state_on)
1419 return;
Ralf Baechle74b02472005-10-19 15:40:02 +01001420
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 /*
1422 * Bring the controller out of reset, but leave it off.
1423 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001424
Ralf Baechle20399732005-10-19 15:39:05 +01001425 __raw_writeq(0, s->sbm_macenable);
Ralf Baechle74b02472005-10-19 15:40:02 +01001426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 /*
1428 * Ignore all received packets
1429 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001430
Ralf Baechle20399732005-10-19 15:39:05 +01001431 __raw_writeq(0, s->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01001432
1433 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 * Calculate values for various control registers.
1435 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001436
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 cfg = M_MAC_RETRY_EN |
Ralf Baechle74b02472005-10-19 15:40:02 +01001438 M_MAC_TX_HOLD_SOP_EN |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 V_MAC_TX_PAUSE_CNT_16K |
1440 M_MAC_AP_STAT_EN |
1441 M_MAC_FAST_SYNC |
1442 M_MAC_SS_EN |
1443 0;
Ralf Baechle74b02472005-10-19 15:40:02 +01001444
1445 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 * Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars
1447 * and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above
1448 * Use a larger RD_THRSH for gigabit
1449 */
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001450 if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 th_value = 28;
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001452 else
1453 th_value = 64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
1455 fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */
1456 ((s->sbm_speed == sbmac_speed_1000)
1457 ? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) |
1458 V_MAC_TX_RL_THRSH(4) |
1459 V_MAC_RX_PL_THRSH(4) |
1460 V_MAC_RX_RD_THRSH(4) | /* Must be '4' */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 V_MAC_RX_RL_THRSH(8) |
1462 0;
1463
1464 framecfg = V_MAC_MIN_FRAMESZ_DEFAULT |
1465 V_MAC_MAX_FRAMESZ_DEFAULT |
1466 V_MAC_BACKOFF_SEL(1);
1467
1468 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001469 * Clear out the hash address map
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001471
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472 port = s->sbm_base + R_MAC_HASH_BASE;
1473 for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001474 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 port += sizeof(uint64_t);
1476 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001477
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 /*
1479 * Clear out the exact-match table
1480 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001481
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 port = s->sbm_base + R_MAC_ADDR_BASE;
1483 for (idx = 0; idx < MAC_ADDR_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001484 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 port += sizeof(uint64_t);
1486 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001487
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 /*
1489 * Clear out the DMA Channel mapping table registers
1490 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001491
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 port = s->sbm_base + R_MAC_CHUP0_BASE;
1493 for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001494 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 port += sizeof(uint64_t);
1496 }
1497
1498
1499 port = s->sbm_base + R_MAC_CHLO0_BASE;
1500 for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001501 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502 port += sizeof(uint64_t);
1503 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001504
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 /*
1506 * Program the hardware address. It goes into the hardware-address
1507 * register as well as the first filter register.
1508 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001509
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 reg = sbmac_addr2reg(s->sbm_hwaddr);
Ralf Baechle74b02472005-10-19 15:40:02 +01001511
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 port = s->sbm_base + R_MAC_ADDR_BASE;
Ralf Baechle20399732005-10-19 15:39:05 +01001513 __raw_writeq(reg, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514 port = s->sbm_base + R_MAC_ETHERNET_ADDR;
1515
1516#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
1517 /*
1518 * Pass1 SOCs do not receive packets addressed to the
1519 * destination address in the R_MAC_ETHERNET_ADDR register.
1520 * Set the value to zero.
1521 */
Ralf Baechle20399732005-10-19 15:39:05 +01001522 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523#else
Ralf Baechle20399732005-10-19 15:39:05 +01001524 __raw_writeq(reg, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525#endif
Ralf Baechle74b02472005-10-19 15:40:02 +01001526
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 /*
1528 * Set the receive filter for no packets, and write values
1529 * to the various config registers
1530 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001531
Ralf Baechle20399732005-10-19 15:39:05 +01001532 __raw_writeq(0, s->sbm_rxfilter);
1533 __raw_writeq(0, s->sbm_imr);
1534 __raw_writeq(framecfg, s->sbm_framecfg);
1535 __raw_writeq(fifo, s->sbm_fifocfg);
1536 __raw_writeq(cfg, s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001537
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 /*
1539 * Initialize DMA channels (rings should be ok now)
1540 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 sbdma_channel_start(&(s->sbm_rxdma), DMA_RX);
1543 sbdma_channel_start(&(s->sbm_txdma), DMA_TX);
Ralf Baechle74b02472005-10-19 15:40:02 +01001544
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 /*
1546 * Configure the speed, duplex, and flow control
1547 */
1548
1549 sbmac_set_speed(s,s->sbm_speed);
1550 sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc);
Ralf Baechle74b02472005-10-19 15:40:02 +01001551
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 /*
1553 * Fill the receive ring
1554 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001555
Stephen Hemminger789585e2008-05-18 04:45:09 +01001556 sbdma_fillring(s, &(s->sbm_rxdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01001557
1558 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 * Turn on the rest of the bits in the enable register
Ralf Baechle74b02472005-10-19 15:40:02 +01001560 */
1561
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001562#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
1563 __raw_writeq(M_MAC_RXDMA_EN0 |
1564 M_MAC_TXDMA_EN0, s->sbm_macenable);
1565#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
Ralf Baechle20399732005-10-19 15:39:05 +01001566 __raw_writeq(M_MAC_RXDMA_EN0 |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567 M_MAC_TXDMA_EN0 |
1568 M_MAC_RX_ENABLE |
Ralf Baechle20399732005-10-19 15:39:05 +01001569 M_MAC_TX_ENABLE, s->sbm_macenable);
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001570#else
1571#error invalid SiByte MAC configuation
1572#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
1574#ifdef CONFIG_SBMAC_COALESCE
Ralf Baechle20399732005-10-19 15:39:05 +01001575 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1576 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), s->sbm_imr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577#else
Ralf Baechle20399732005-10-19 15:39:05 +01001578 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
1579 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), s->sbm_imr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580#endif
Ralf Baechle74b02472005-10-19 15:40:02 +01001581
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001583 * Enable receiving unicasts and broadcasts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001585
1586 __raw_writeq(M_MAC_UCAST_EN | M_MAC_BCAST_EN, s->sbm_rxfilter);
1587
1588 /*
1589 * we're running now.
1590 */
1591
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 s->sbm_state = sbmac_state_on;
Ralf Baechle74b02472005-10-19 15:40:02 +01001593
1594 /*
1595 * Program multicast addresses
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001597
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 sbmac_setmulti(s);
Ralf Baechle74b02472005-10-19 15:40:02 +01001599
1600 /*
1601 * If channel was in promiscuous mode before, turn that on
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001603
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 if (s->sbm_devflags & IFF_PROMISC) {
1605 sbmac_promiscuous_mode(s,1);
1606 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001607
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608}
1609
1610
1611/**********************************************************************
1612 * SBMAC_CHANNEL_STOP(s)
Ralf Baechle74b02472005-10-19 15:40:02 +01001613 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 * Stop packet processing on this MAC.
Ralf Baechle74b02472005-10-19 15:40:02 +01001615 *
1616 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 * s - sbmac structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001618 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 * Return value:
1620 * nothing
1621 ********************************************************************* */
1622
1623static void sbmac_channel_stop(struct sbmac_softc *s)
1624{
1625 /* don't do this if already stopped */
Ralf Baechle74b02472005-10-19 15:40:02 +01001626
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 if (s->sbm_state == sbmac_state_off)
1628 return;
Ralf Baechle74b02472005-10-19 15:40:02 +01001629
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 /* don't accept any packets, disable all interrupts */
Ralf Baechle74b02472005-10-19 15:40:02 +01001631
Ralf Baechle20399732005-10-19 15:39:05 +01001632 __raw_writeq(0, s->sbm_rxfilter);
1633 __raw_writeq(0, s->sbm_imr);
Ralf Baechle74b02472005-10-19 15:40:02 +01001634
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 /* Turn off ticker */
Ralf Baechle74b02472005-10-19 15:40:02 +01001636
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 /* XXX */
Ralf Baechle74b02472005-10-19 15:40:02 +01001638
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 /* turn off receiver and transmitter */
Ralf Baechle74b02472005-10-19 15:40:02 +01001640
Ralf Baechle20399732005-10-19 15:39:05 +01001641 __raw_writeq(0, s->sbm_macenable);
Ralf Baechle74b02472005-10-19 15:40:02 +01001642
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 /* We're stopped now. */
Ralf Baechle74b02472005-10-19 15:40:02 +01001644
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 s->sbm_state = sbmac_state_off;
Ralf Baechle74b02472005-10-19 15:40:02 +01001646
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 /*
1648 * Stop DMA channels (rings should be ok now)
1649 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001650
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 sbdma_channel_stop(&(s->sbm_rxdma));
1652 sbdma_channel_stop(&(s->sbm_txdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01001653
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 /* Empty the receive and transmit rings */
Ralf Baechle74b02472005-10-19 15:40:02 +01001655
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 sbdma_emptyring(&(s->sbm_rxdma));
1657 sbdma_emptyring(&(s->sbm_txdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01001658
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659}
1660
1661/**********************************************************************
1662 * SBMAC_SET_CHANNEL_STATE(state)
Ralf Baechle74b02472005-10-19 15:40:02 +01001663 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 * Set the channel's state ON or OFF
Ralf Baechle74b02472005-10-19 15:40:02 +01001665 *
1666 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 * state - new state
Ralf Baechle74b02472005-10-19 15:40:02 +01001668 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 * Return value:
1670 * old state
1671 ********************************************************************* */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001672static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *sc,
1673 enum sbmac_state state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674{
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001675 enum sbmac_state oldstate = sc->sbm_state;
Ralf Baechle74b02472005-10-19 15:40:02 +01001676
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 /*
1678 * If same as previous state, return
1679 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001680
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 if (state == oldstate) {
1682 return oldstate;
1683 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001684
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001686 * If new state is ON, turn channel on
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001688
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 if (state == sbmac_state_on) {
1690 sbmac_channel_start(sc);
1691 }
1692 else {
1693 sbmac_channel_stop(sc);
1694 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001695
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 /*
1697 * Return previous state
1698 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001699
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 return oldstate;
1701}
1702
1703
1704/**********************************************************************
1705 * SBMAC_PROMISCUOUS_MODE(sc,onoff)
Ralf Baechle74b02472005-10-19 15:40:02 +01001706 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 * Turn on or off promiscuous mode
Ralf Baechle74b02472005-10-19 15:40:02 +01001708 *
1709 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 * sc - softc
1711 * onoff - 1 to turn on, 0 to turn off
Ralf Baechle74b02472005-10-19 15:40:02 +01001712 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 * Return value:
1714 * nothing
1715 ********************************************************************* */
1716
1717static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff)
1718{
1719 uint64_t reg;
Ralf Baechle74b02472005-10-19 15:40:02 +01001720
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 if (sc->sbm_state != sbmac_state_on)
1722 return;
Ralf Baechle74b02472005-10-19 15:40:02 +01001723
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 if (onoff) {
Ralf Baechle20399732005-10-19 15:39:05 +01001725 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 reg |= M_MAC_ALLPKT_EN;
Ralf Baechle20399732005-10-19 15:39:05 +01001727 __raw_writeq(reg, sc->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01001728 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 else {
Ralf Baechle20399732005-10-19 15:39:05 +01001730 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 reg &= ~M_MAC_ALLPKT_EN;
Ralf Baechle20399732005-10-19 15:39:05 +01001732 __raw_writeq(reg, sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 }
1734}
1735
1736/**********************************************************************
1737 * SBMAC_SETIPHDR_OFFSET(sc,onoff)
Ralf Baechle74b02472005-10-19 15:40:02 +01001738 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 * Set the iphdr offset as 15 assuming ethernet encapsulation
Ralf Baechle74b02472005-10-19 15:40:02 +01001740 *
1741 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 * sc - softc
Ralf Baechle74b02472005-10-19 15:40:02 +01001743 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 * Return value:
1745 * nothing
1746 ********************************************************************* */
1747
1748static void sbmac_set_iphdr_offset(struct sbmac_softc *sc)
1749{
1750 uint64_t reg;
Ralf Baechle74b02472005-10-19 15:40:02 +01001751
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 /* Hard code the off set to 15 for now */
Ralf Baechle20399732005-10-19 15:39:05 +01001753 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15);
Ralf Baechle20399732005-10-19 15:39:05 +01001755 __raw_writeq(reg, sc->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01001756
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001757 /* BCM1250 pass1 didn't have hardware checksum. Everything
1758 later does. */
1759 if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 sc->rx_hw_checksum = DISABLE;
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001761 } else {
1762 sc->rx_hw_checksum = ENABLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763 }
1764}
1765
1766
1767/**********************************************************************
1768 * SBMAC_ADDR2REG(ptr)
Ralf Baechle74b02472005-10-19 15:40:02 +01001769 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 * Convert six bytes into the 64-bit register value that
1771 * we typically write into the SBMAC's address/mcast registers
Ralf Baechle74b02472005-10-19 15:40:02 +01001772 *
1773 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 * ptr - pointer to 6 bytes
Ralf Baechle74b02472005-10-19 15:40:02 +01001775 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 * Return value:
1777 * register value
1778 ********************************************************************* */
1779
1780static uint64_t sbmac_addr2reg(unsigned char *ptr)
1781{
1782 uint64_t reg = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +01001783
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 ptr += 6;
Ralf Baechle74b02472005-10-19 15:40:02 +01001785
1786 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001788 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001790 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001792 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001794 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001796 reg |= (uint64_t) *(--ptr);
1797
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 return reg;
1799}
1800
1801
1802/**********************************************************************
1803 * SBMAC_SET_SPEED(s,speed)
Ralf Baechle74b02472005-10-19 15:40:02 +01001804 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 * Configure LAN speed for the specified MAC.
1806 * Warning: must be called when MAC is off!
Ralf Baechle74b02472005-10-19 15:40:02 +01001807 *
1808 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001809 * s - sbmac structure
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001810 * speed - speed to set MAC to (see enum sbmac_speed)
Ralf Baechle74b02472005-10-19 15:40:02 +01001811 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 * Return value:
1813 * 1 if successful
1814 * 0 indicates invalid parameters
1815 ********************************************************************* */
1816
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001817static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818{
1819 uint64_t cfg;
1820 uint64_t framecfg;
1821
1822 /*
1823 * Save new current values
1824 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001825
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 s->sbm_speed = speed;
Ralf Baechle74b02472005-10-19 15:40:02 +01001827
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 if (s->sbm_state == sbmac_state_on)
1829 return 0; /* save for next restart */
1830
1831 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001832 * Read current register values
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001834
Ralf Baechle20399732005-10-19 15:39:05 +01001835 cfg = __raw_readq(s->sbm_maccfg);
1836 framecfg = __raw_readq(s->sbm_framecfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001837
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 /*
1839 * Mask out the stuff we want to change
1840 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001841
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL);
1843 framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH |
1844 M_MAC_SLOT_SIZE);
Ralf Baechle74b02472005-10-19 15:40:02 +01001845
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 /*
1847 * Now add in the new bits
1848 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001849
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 switch (speed) {
1851 case sbmac_speed_10:
1852 framecfg |= V_MAC_IFG_RX_10 |
1853 V_MAC_IFG_TX_10 |
1854 K_MAC_IFG_THRSH_10 |
1855 V_MAC_SLOT_SIZE_10;
1856 cfg |= V_MAC_SPEED_SEL_10MBPS;
1857 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001858
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 case sbmac_speed_100:
1860 framecfg |= V_MAC_IFG_RX_100 |
1861 V_MAC_IFG_TX_100 |
1862 V_MAC_IFG_THRSH_100 |
1863 V_MAC_SLOT_SIZE_100;
1864 cfg |= V_MAC_SPEED_SEL_100MBPS ;
1865 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001866
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 case sbmac_speed_1000:
1868 framecfg |= V_MAC_IFG_RX_1000 |
1869 V_MAC_IFG_TX_1000 |
1870 V_MAC_IFG_THRSH_1000 |
1871 V_MAC_SLOT_SIZE_1000;
1872 cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN;
1873 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001874
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 default:
1876 return 0;
1877 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001878
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001880 * Send the bits back to the hardware
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001882
Ralf Baechle20399732005-10-19 15:39:05 +01001883 __raw_writeq(framecfg, s->sbm_framecfg);
1884 __raw_writeq(cfg, s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001885
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 return 1;
1887}
1888
1889/**********************************************************************
1890 * SBMAC_SET_DUPLEX(s,duplex,fc)
Ralf Baechle74b02472005-10-19 15:40:02 +01001891 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892 * Set Ethernet duplex and flow control options for this MAC
1893 * Warning: must be called when MAC is off!
Ralf Baechle74b02472005-10-19 15:40:02 +01001894 *
1895 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 * s - sbmac structure
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001897 * duplex - duplex setting (see enum sbmac_duplex)
1898 * fc - flow control setting (see enum sbmac_fc)
Ralf Baechle74b02472005-10-19 15:40:02 +01001899 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 * Return value:
1901 * 1 if ok
1902 * 0 if an invalid parameter combination was specified
1903 ********************************************************************* */
1904
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001905static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
1906 enum sbmac_fc fc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907{
1908 uint64_t cfg;
Ralf Baechle74b02472005-10-19 15:40:02 +01001909
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 /*
1911 * Save new current values
1912 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001913
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 s->sbm_duplex = duplex;
1915 s->sbm_fc = fc;
Ralf Baechle74b02472005-10-19 15:40:02 +01001916
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 if (s->sbm_state == sbmac_state_on)
1918 return 0; /* save for next restart */
Ralf Baechle74b02472005-10-19 15:40:02 +01001919
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001921 * Read current register values
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001923
Ralf Baechle20399732005-10-19 15:39:05 +01001924 cfg = __raw_readq(s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001925
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 /*
1927 * Mask off the stuff we're about to change
1928 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001929
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930 cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN);
Ralf Baechle74b02472005-10-19 15:40:02 +01001931
1932
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 switch (duplex) {
1934 case sbmac_duplex_half:
1935 switch (fc) {
1936 case sbmac_fc_disabled:
1937 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED;
1938 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001939
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 case sbmac_fc_collision:
1941 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED;
1942 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001943
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 case sbmac_fc_carrier:
1945 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR;
1946 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001947
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948 case sbmac_fc_frame: /* not valid in half duplex */
1949 default: /* invalid selection */
1950 return 0;
1951 }
1952 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001953
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954 case sbmac_duplex_full:
1955 switch (fc) {
1956 case sbmac_fc_disabled:
1957 cfg |= V_MAC_FC_CMD_DISABLED;
1958 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001959
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 case sbmac_fc_frame:
1961 cfg |= V_MAC_FC_CMD_ENABLED;
1962 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001963
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 case sbmac_fc_collision: /* not valid in full duplex */
1965 case sbmac_fc_carrier: /* not valid in full duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966 default:
1967 return 0;
1968 }
1969 break;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01001970 default:
1971 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001973
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001975 * Send the bits back to the hardware
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001977
Ralf Baechle20399732005-10-19 15:39:05 +01001978 __raw_writeq(cfg, s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001979
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980 return 1;
1981}
1982
1983
1984
1985
1986/**********************************************************************
1987 * SBMAC_INTR()
Ralf Baechle74b02472005-10-19 15:40:02 +01001988 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989 * Interrupt handler for MAC interrupts
Ralf Baechle74b02472005-10-19 15:40:02 +01001990 *
1991 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992 * MAC structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001993 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 * Return value:
1995 * nothing
1996 ********************************************************************* */
David Howells7d12e782006-10-05 14:55:46 +01001997static irqreturn_t sbmac_intr(int irq,void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998{
1999 struct net_device *dev = (struct net_device *) dev_instance;
2000 struct sbmac_softc *sc = netdev_priv(dev);
2001 uint64_t isr;
2002 int handled = 0;
2003
Mark Mason693aa942007-04-26 00:23:22 -07002004 /*
2005 * Read the ISR (this clears the bits in the real
2006 * register, except for counter addr)
2007 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002008
Mark Mason693aa942007-04-26 00:23:22 -07002009 isr = __raw_readq(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR;
Ralf Baechle74b02472005-10-19 15:40:02 +01002010
Mark Mason693aa942007-04-26 00:23:22 -07002011 if (isr == 0)
2012 return IRQ_RETVAL(0);
2013 handled = 1;
Ralf Baechle74b02472005-10-19 15:40:02 +01002014
Mark Mason693aa942007-04-26 00:23:22 -07002015 /*
2016 * Transmits on channel 0
2017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002019 if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0))
Mark Mason693aa942007-04-26 00:23:22 -07002020 sbdma_tx_process(sc,&(sc->sbm_txdma), 0);
Ralf Baechle74b02472005-10-19 15:40:02 +01002021
Mark Mason693aa942007-04-26 00:23:22 -07002022 if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
Ben Hutchings288379f2009-01-19 16:43:59 -08002023 if (napi_schedule_prep(&sc->napi)) {
Mark Mason693aa942007-04-26 00:23:22 -07002024 __raw_writeq(0, sc->sbm_imr);
Ben Hutchings288379f2009-01-19 16:43:59 -08002025 __napi_schedule(&sc->napi);
Mark Mason693aa942007-04-26 00:23:22 -07002026 /* Depend on the exit from poll to reenable intr */
2027 }
2028 else {
2029 /* may leave some packets behind */
2030 sbdma_rx_process(sc,&(sc->sbm_rxdma),
2031 SBMAC_MAX_RXDESCR * 2, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 }
2033 }
2034 return IRQ_RETVAL(handled);
2035}
2036
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037/**********************************************************************
2038 * SBMAC_START_TX(skb,dev)
Ralf Baechle74b02472005-10-19 15:40:02 +01002039 *
2040 * Start output on the specified interface. Basically, we
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 * queue as many buffers as we can until the ring fills up, or
2042 * we run off the end of the queue, whichever comes first.
Ralf Baechle74b02472005-10-19 15:40:02 +01002043 *
2044 * Input parameters:
2045 *
2046 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 * Return value:
2048 * nothing
2049 ********************************************************************* */
2050static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
2051{
2052 struct sbmac_softc *sc = netdev_priv(dev);
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002053 unsigned long flags;
Ralf Baechle74b02472005-10-19 15:40:02 +01002054
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 /* lock eth irq */
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002056 spin_lock_irqsave(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002057
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01002059 * Put the buffer on the transmit ring. If we
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 * don't have room, stop the queue.
2061 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002062
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063 if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) {
2064 /* XXX save skb that we could not send */
2065 netif_stop_queue(dev);
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002066 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067
Patrick McHardy5b548142009-06-12 06:22:29 +00002068 return NETDEV_TX_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002070
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002071 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002072
Patrick McHardy6ed10652009-06-23 06:03:08 +00002073 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074}
2075
2076/**********************************************************************
2077 * SBMAC_SETMULTI(sc)
Ralf Baechle74b02472005-10-19 15:40:02 +01002078 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 * Reprogram the multicast table into the hardware, given
2080 * the list of multicasts associated with the interface
2081 * structure.
Ralf Baechle74b02472005-10-19 15:40:02 +01002082 *
2083 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 * sc - softc
Ralf Baechle74b02472005-10-19 15:40:02 +01002085 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 * Return value:
2087 * nothing
2088 ********************************************************************* */
2089
2090static void sbmac_setmulti(struct sbmac_softc *sc)
2091{
2092 uint64_t reg;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01002093 void __iomem *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094 int idx;
Jiri Pirko22bedad32010-04-01 21:22:57 +00002095 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 struct net_device *dev = sc->sbm_dev;
Ralf Baechle74b02472005-10-19 15:40:02 +01002097
2098 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 * Clear out entire multicast table. We do this by nuking
2100 * the entire hash table and all the direct matches except
Ralf Baechle74b02472005-10-19 15:40:02 +01002101 * the first one, which is used for our station address
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002103
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 for (idx = 1; idx < MAC_ADDR_COUNT; idx++) {
2105 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t));
Ralf Baechle20399732005-10-19 15:39:05 +01002106 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002108
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109 for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
2110 port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t));
Ralf Baechle20399732005-10-19 15:39:05 +01002111 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002113
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 /*
2115 * Clear the filter to say we don't want any multicasts.
2116 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002117
Ralf Baechle20399732005-10-19 15:39:05 +01002118 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN);
Ralf Baechle20399732005-10-19 15:39:05 +01002120 __raw_writeq(reg, sc->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01002121
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122 if (dev->flags & IFF_ALLMULTI) {
Ralf Baechle74b02472005-10-19 15:40:02 +01002123 /*
2124 * Enable ALL multicasts. Do this by inverting the
2125 * multicast enable bit.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 */
Ralf Baechle20399732005-10-19 15:39:05 +01002127 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN);
Ralf Baechle20399732005-10-19 15:39:05 +01002129 __raw_writeq(reg, sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130 return;
2131 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132
Ralf Baechle74b02472005-10-19 15:40:02 +01002133
2134 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 * Progam new multicast entries. For now, only use the
2136 * perfect filter. In the future we'll need to use the
2137 * hash filter if the perfect filter overflows
2138 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002139
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 /* XXX only using perfect filter for now, need to use hash
2141 * XXX if the table overflows */
Ralf Baechle74b02472005-10-19 15:40:02 +01002142
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 idx = 1; /* skip station address */
Jiri Pirko22bedad32010-04-01 21:22:57 +00002144 netdev_for_each_mc_addr(ha, dev) {
Jiri Pirko55085902010-02-18 00:42:54 +00002145 if (idx == MAC_ADDR_COUNT)
2146 break;
Jiri Pirko22bedad32010-04-01 21:22:57 +00002147 reg = sbmac_addr2reg(ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t));
Ralf Baechle20399732005-10-19 15:39:05 +01002149 __raw_writeq(reg, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002152
2153 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154 * Enable the "accept multicast bits" if we programmed at least one
Ralf Baechle74b02472005-10-19 15:40:02 +01002155 * multicast.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002157
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 if (idx > 1) {
Ralf Baechle20399732005-10-19 15:39:05 +01002159 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 reg |= M_MAC_MCAST_EN;
Ralf Baechle20399732005-10-19 15:39:05 +01002161 __raw_writeq(reg, sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 }
2163}
2164
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165static int sb1250_change_mtu(struct net_device *_dev, int new_mtu)
2166{
2167 if (new_mtu > ENET_PACKET_SIZE)
2168 return -EINVAL;
2169 _dev->mtu = new_mtu;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002170 pr_info("changing the mtu to %d\n", new_mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 return 0;
2172}
2173
Alexander Beregalovb4cf3422009-04-15 12:52:57 +00002174static const struct net_device_ops sbmac_netdev_ops = {
2175 .ndo_open = sbmac_open,
2176 .ndo_stop = sbmac_close,
2177 .ndo_start_xmit = sbmac_start_tx,
2178 .ndo_set_multicast_list = sbmac_set_rx_mode,
2179 .ndo_tx_timeout = sbmac_tx_timeout,
2180 .ndo_do_ioctl = sbmac_mii_ioctl,
2181 .ndo_change_mtu = sb1250_change_mtu,
2182 .ndo_validate_addr = eth_validate_addr,
2183 .ndo_set_mac_address = eth_mac_addr,
2184#ifdef CONFIG_NET_POLL_CONTROLLER
2185 .ndo_poll_controller = sbmac_netpoll,
2186#endif
2187};
2188
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189/**********************************************************************
2190 * SBMAC_INIT(dev)
Ralf Baechle74b02472005-10-19 15:40:02 +01002191 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192 * Attach routine - init hardware and hook ourselves into linux
Ralf Baechle74b02472005-10-19 15:40:02 +01002193 *
2194 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195 * dev - net_device structure
Ralf Baechle74b02472005-10-19 15:40:02 +01002196 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002197 * Return value:
2198 * status
2199 ********************************************************************* */
2200
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002201static int sbmac_init(struct platform_device *pldev, long long base)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002202{
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07002203 struct net_device *dev = dev_get_drvdata(&pldev->dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002204 int idx = pldev->id;
2205 struct sbmac_softc *sc = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 unsigned char *eaddr;
2207 uint64_t ea_reg;
2208 int i;
2209 int err;
Ralf Baechle74b02472005-10-19 15:40:02 +01002210
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 sc->sbm_dev = dev;
2212 sc->sbe_idx = idx;
Ralf Baechle74b02472005-10-19 15:40:02 +01002213
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 eaddr = sc->sbm_hwaddr;
Ralf Baechle74b02472005-10-19 15:40:02 +01002215
2216 /*
Nick Andrew877d0312009-01-26 11:06:57 +01002217 * Read the ethernet address. The firmware left this programmed
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218 * for us in the ethernet address register for each mac.
2219 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002220
Ralf Baechle20399732005-10-19 15:39:05 +01002221 ea_reg = __raw_readq(sc->sbm_base + R_MAC_ETHERNET_ADDR);
2222 __raw_writeq(0, sc->sbm_base + R_MAC_ETHERNET_ADDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 for (i = 0; i < 6; i++) {
2224 eaddr[i] = (uint8_t) (ea_reg & 0xFF);
2225 ea_reg >>= 8;
2226 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002227
Linus Torvalds1da177e2005-04-16 15:20:36 -07002228 for (i = 0; i < 6; i++) {
2229 dev->dev_addr[i] = eaddr[i];
2230 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002231
Ralf Baechle74b02472005-10-19 15:40:02 +01002232 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002233 * Initialize context (get pointers to registers and stuff), then
2234 * allocate the memory for the descriptor tables.
2235 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002236
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237 sbmac_initctx(sc);
Ralf Baechle74b02472005-10-19 15:40:02 +01002238
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239 /*
2240 * Set up Linux device callins
2241 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002242
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 spin_lock_init(&(sc->sbm_lock));
Ralf Baechle74b02472005-10-19 15:40:02 +01002244
Alexander Beregalovb4cf3422009-04-15 12:52:57 +00002245 dev->netdev_ops = &sbmac_netdev_ops;
2246 dev->watchdog_timeo = TX_TIMEOUT;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002247
2248 netif_napi_add(dev, &sc->napi, sbmac_poll, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002249
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002250 dev->irq = UNIT_INT(idx);
2251
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 /* This is needed for PASS2 for Rx H/W checksum feature */
2253 sbmac_set_iphdr_offset(sc);
2254
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002255 sc->mii_bus = mdiobus_alloc();
2256 if (sc->mii_bus == NULL) {
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002257 err = -ENOMEM;
2258 goto uninit_ctx;
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002259 }
2260
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002261 sc->mii_bus->name = sbmac_mdio_string;
2262 snprintf(sc->mii_bus->id, MII_BUS_ID_SIZE, "%x", idx);
2263 sc->mii_bus->priv = sc;
2264 sc->mii_bus->read = sbmac_mii_read;
2265 sc->mii_bus->write = sbmac_mii_write;
2266 sc->mii_bus->irq = sc->phy_irq;
2267 for (i = 0; i < PHY_MAX_ADDR; ++i)
2268 sc->mii_bus->irq[i] = SBMAC_PHY_INT;
2269
2270 sc->mii_bus->parent = &pldev->dev;
2271 /*
2272 * Probe PHY address
2273 */
2274 err = mdiobus_register(sc->mii_bus);
2275 if (err) {
2276 printk(KERN_ERR "%s: unable to register MDIO bus\n",
2277 dev->name);
2278 goto free_mdio;
2279 }
2280 dev_set_drvdata(&pldev->dev, sc->mii_bus);
2281
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 err = register_netdev(dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002283 if (err) {
2284 printk(KERN_ERR "%s.%d: unable to register netdev\n",
2285 sbmac_string, idx);
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002286 goto unreg_mdio;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287 }
2288
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002289 pr_info("%s.%d: registered as %s\n", sbmac_string, idx, dev->name);
2290
2291 if (sc->rx_hw_checksum == ENABLE)
2292 pr_info("%s: enabling TCP rcv checksum\n", dev->name);
2293
Linus Torvalds1da177e2005-04-16 15:20:36 -07002294 /*
2295 * Display Ethernet address (this is called during the config
2296 * process so we need to finish off the config message that
2297 * was being displayed)
2298 */
Johannes Berge1749612008-10-27 15:59:26 -07002299 pr_info("%s: SiByte Ethernet at 0x%08Lx, address: %pM\n",
2300 dev->name, base, eaddr);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002301
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302 return 0;
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002303unreg_mdio:
2304 mdiobus_unregister(sc->mii_bus);
2305 dev_set_drvdata(&pldev->dev, NULL);
2306free_mdio:
2307 mdiobus_free(sc->mii_bus);
2308uninit_ctx:
2309 sbmac_uninitctx(sc);
2310 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311}
2312
2313
2314static int sbmac_open(struct net_device *dev)
2315{
2316 struct sbmac_softc *sc = netdev_priv(dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002317 int err;
Ralf Baechle74b02472005-10-19 15:40:02 +01002318
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002319 if (debug > 1)
2320 pr_debug("%s: sbmac_open() irq %d.\n", dev->name, dev->irq);
Ralf Baechle74b02472005-10-19 15:40:02 +01002321
2322 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 * map/route interrupt (clear status first, in case something
2324 * weird is pending; we haven't initialized the mac registers
2325 * yet)
2326 */
2327
Ralf Baechle20399732005-10-19 15:39:05 +01002328 __raw_readq(sc->sbm_isr);
Joe Perchesa0607fd2009-11-18 23:29:17 -08002329 err = request_irq(dev->irq, sbmac_intr, IRQF_SHARED, dev->name, dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002330 if (err) {
2331 printk(KERN_ERR "%s: unable to get IRQ %d\n", dev->name,
2332 dev->irq);
2333 goto out_err;
Ralf Baechle59b81822005-10-20 12:01:28 +01002334 }
2335
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002336 sc->sbm_speed = sbmac_speed_none;
2337 sc->sbm_duplex = sbmac_duplex_none;
2338 sc->sbm_fc = sbmac_fc_none;
2339 sc->sbm_pause = -1;
2340 sc->sbm_link = 0;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002341
Ralf Baechle59b81822005-10-20 12:01:28 +01002342 /*
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002343 * Attach to the PHY
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002345 err = sbmac_mii_probe(dev);
2346 if (err)
2347 goto out_unregister;
Ralf Baechle74b02472005-10-19 15:40:02 +01002348
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349 /*
2350 * Turn on the channel
2351 */
2352
2353 sbmac_set_channel_state(sc,sbmac_state_on);
Ralf Baechle74b02472005-10-19 15:40:02 +01002354
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 netif_start_queue(dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01002356
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 sbmac_set_rx_mode(dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01002358
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002359 phy_start(sc->phy_dev);
2360
2361 napi_enable(&sc->napi);
Ralf Baechle74b02472005-10-19 15:40:02 +01002362
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363 return 0;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002364
2365out_unregister:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002366 free_irq(dev->irq, dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002367out_err:
2368 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369}
2370
Ralf Baechle59b81822005-10-20 12:01:28 +01002371static int sbmac_mii_probe(struct net_device *dev)
2372{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 struct sbmac_softc *sc = netdev_priv(dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002374 struct phy_device *phy_dev;
2375 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002377 for (i = 0; i < PHY_MAX_ADDR; i++) {
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002378 phy_dev = sc->mii_bus->phy_map[i];
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002379 if (phy_dev)
2380 break;
2381 }
2382 if (!phy_dev) {
2383 printk(KERN_ERR "%s: no PHY found\n", dev->name);
2384 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002386
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002387 phy_dev = phy_connect(dev, dev_name(&phy_dev->dev), &sbmac_mii_poll, 0,
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002388 PHY_INTERFACE_MODE_GMII);
2389 if (IS_ERR(phy_dev)) {
2390 printk(KERN_ERR "%s: could not attach to PHY\n", dev->name);
2391 return PTR_ERR(phy_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002393
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002394 /* Remove any features not supported by the controller */
2395 phy_dev->supported &= SUPPORTED_10baseT_Half |
2396 SUPPORTED_10baseT_Full |
2397 SUPPORTED_100baseT_Half |
2398 SUPPORTED_100baseT_Full |
2399 SUPPORTED_1000baseT_Half |
2400 SUPPORTED_1000baseT_Full |
2401 SUPPORTED_Autoneg |
2402 SUPPORTED_MII |
2403 SUPPORTED_Pause |
2404 SUPPORTED_Asym_Pause;
2405 phy_dev->advertising = phy_dev->supported;
Ralf Baechle74b02472005-10-19 15:40:02 +01002406
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002407 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
2408 dev->name, phy_dev->drv->name,
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002409 dev_name(&phy_dev->dev), phy_dev->irq);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002410
2411 sc->phy_dev = phy_dev;
2412
2413 return 0;
2414}
2415
2416
2417static void sbmac_mii_poll(struct net_device *dev)
2418{
2419 struct sbmac_softc *sc = netdev_priv(dev);
2420 struct phy_device *phy_dev = sc->phy_dev;
2421 unsigned long flags;
2422 enum sbmac_fc fc;
2423 int link_chg, speed_chg, duplex_chg, pause_chg, fc_chg;
2424
2425 link_chg = (sc->sbm_link != phy_dev->link);
2426 speed_chg = (sc->sbm_speed != phy_dev->speed);
2427 duplex_chg = (sc->sbm_duplex != phy_dev->duplex);
2428 pause_chg = (sc->sbm_pause != phy_dev->pause);
2429
2430 if (!link_chg && !speed_chg && !duplex_chg && !pause_chg)
2431 return; /* Hmmm... */
2432
2433 if (!phy_dev->link) {
2434 if (link_chg) {
2435 sc->sbm_link = phy_dev->link;
2436 sc->sbm_speed = sbmac_speed_none;
2437 sc->sbm_duplex = sbmac_duplex_none;
2438 sc->sbm_fc = sbmac_fc_disabled;
2439 sc->sbm_pause = -1;
2440 pr_info("%s: link unavailable\n", dev->name);
2441 }
2442 return;
2443 }
2444
2445 if (phy_dev->duplex == DUPLEX_FULL) {
2446 if (phy_dev->pause)
2447 fc = sbmac_fc_frame;
2448 else
2449 fc = sbmac_fc_disabled;
2450 } else
2451 fc = sbmac_fc_collision;
2452 fc_chg = (sc->sbm_fc != fc);
2453
2454 pr_info("%s: link available: %dbase-%cD\n", dev->name, phy_dev->speed,
2455 phy_dev->duplex == DUPLEX_FULL ? 'F' : 'H');
2456
2457 spin_lock_irqsave(&sc->sbm_lock, flags);
2458
2459 sc->sbm_speed = phy_dev->speed;
2460 sc->sbm_duplex = phy_dev->duplex;
2461 sc->sbm_fc = fc;
2462 sc->sbm_pause = phy_dev->pause;
2463 sc->sbm_link = phy_dev->link;
2464
2465 if ((speed_chg || duplex_chg || fc_chg) &&
2466 sc->sbm_state != sbmac_state_off) {
2467 /*
2468 * something changed, restart the channel
2469 */
2470 if (debug > 1)
2471 pr_debug("%s: restarting channel "
2472 "because PHY state changed\n", dev->name);
2473 sbmac_channel_stop(sc);
2474 sbmac_channel_start(sc);
2475 }
2476
2477 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002478}
2479
2480
2481static void sbmac_tx_timeout (struct net_device *dev)
2482{
2483 struct sbmac_softc *sc = netdev_priv(dev);
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002484 unsigned long flags;
Ralf Baechle74b02472005-10-19 15:40:02 +01002485
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002486 spin_lock_irqsave(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002487
2488
Eric Dumazet1ae5dc32010-05-10 05:01:31 -07002489 dev->trans_start = jiffies; /* prevent tx timeout */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002490 dev->stats.tx_errors++;
Ralf Baechle74b02472005-10-19 15:40:02 +01002491
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002492 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493
2494 printk (KERN_WARNING "%s: Transmit timed out\n",dev->name);
2495}
2496
2497
2498
2499
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500static void sbmac_set_rx_mode(struct net_device *dev)
2501{
2502 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503 struct sbmac_softc *sc = netdev_priv(dev);
2504
2505 spin_lock_irqsave(&sc->sbm_lock, flags);
2506 if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) {
2507 /*
2508 * Promiscuous changed.
2509 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002510
2511 if (dev->flags & IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512 sbmac_promiscuous_mode(sc,1);
2513 }
2514 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515 sbmac_promiscuous_mode(sc,0);
2516 }
2517 }
2518 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002519
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520 /*
2521 * Program the multicasts. Do this every time.
2522 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002523
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524 sbmac_setmulti(sc);
Ralf Baechle74b02472005-10-19 15:40:02 +01002525
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526}
2527
2528static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2529{
2530 struct sbmac_softc *sc = netdev_priv(dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01002531
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002532 if (!netif_running(dev) || !sc->phy_dev)
2533 return -EINVAL;
Ralf Baechle74b02472005-10-19 15:40:02 +01002534
Richard Cochran28b04112010-07-17 08:48:55 +00002535 return phy_mii_ioctl(sc->phy_dev, rq, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536}
2537
2538static int sbmac_close(struct net_device *dev)
2539{
2540 struct sbmac_softc *sc = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002542 napi_disable(&sc->napi);
2543
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002544 phy_stop(sc->phy_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002546 sbmac_set_channel_state(sc, sbmac_state_off);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547
2548 netif_stop_queue(dev);
2549
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002550 if (debug > 1)
2551 pr_debug("%s: Shutting down ethercard\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002553 phy_disconnect(sc->phy_dev);
2554 sc->phy_dev = NULL;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002555 free_irq(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002556
2557 sbdma_emptyring(&(sc->sbm_txdma));
2558 sbdma_emptyring(&(sc->sbm_rxdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01002559
Linus Torvalds1da177e2005-04-16 15:20:36 -07002560 return 0;
2561}
2562
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002563static int sbmac_poll(struct napi_struct *napi, int budget)
Mark Mason693aa942007-04-26 00:23:22 -07002564{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002565 struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi);
Mark Mason693aa942007-04-26 00:23:22 -07002566 int work_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002568 work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1);
Mark Mason693aa942007-04-26 00:23:22 -07002569 sbdma_tx_process(sc, &(sc->sbm_txdma), 1);
2570
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002571 if (work_done < budget) {
Ben Hutchings288379f2009-01-19 16:43:59 -08002572 napi_complete(napi);
Mark Mason693aa942007-04-26 00:23:22 -07002573
2574#ifdef CONFIG_SBMAC_COALESCE
2575 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
2576 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
2577 sc->sbm_imr);
2578#else
2579 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
2580 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
2581#endif
2582 }
2583
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002584 return work_done;
Mark Mason693aa942007-04-26 00:23:22 -07002585}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002587
Uwe Kleine-Königffe85532009-07-21 11:25:25 +00002588static int __devinit sbmac_probe(struct platform_device *pldev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002589{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002590 struct net_device *dev;
2591 struct sbmac_softc *sc;
2592 void __iomem *sbm_base;
2593 struct resource *res;
2594 u64 sbmac_orig_hwaddr;
2595 int err;
2596
2597 res = platform_get_resource(pldev, IORESOURCE_MEM, 0);
2598 BUG_ON(!res);
2599 sbm_base = ioremap_nocache(res->start, res->end - res->start + 1);
2600 if (!sbm_base) {
2601 printk(KERN_ERR "%s: unable to map device registers\n",
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002602 dev_name(&pldev->dev));
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002603 err = -ENOMEM;
2604 goto out_out;
2605 }
2606
2607 /*
2608 * The R_MAC_ETHERNET_ADDR register will be set to some nonzero
2609 * value for us by the firmware if we're going to use this MAC.
2610 * If we find a zero, skip this MAC.
2611 */
2612 sbmac_orig_hwaddr = __raw_readq(sbm_base + R_MAC_ETHERNET_ADDR);
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002613 pr_debug("%s: %sconfiguring MAC at 0x%08Lx\n", dev_name(&pldev->dev),
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002614 sbmac_orig_hwaddr ? "" : "not ", (long long)res->start);
2615 if (sbmac_orig_hwaddr == 0) {
2616 err = 0;
2617 goto out_unmap;
2618 }
2619
2620 /*
2621 * Okay, cool. Initialize this MAC.
2622 */
2623 dev = alloc_etherdev(sizeof(struct sbmac_softc));
2624 if (!dev) {
2625 printk(KERN_ERR "%s: unable to allocate etherdev\n",
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002626 dev_name(&pldev->dev));
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002627 err = -ENOMEM;
2628 goto out_unmap;
2629 }
2630
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07002631 dev_set_drvdata(&pldev->dev, dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002632 SET_NETDEV_DEV(dev, &pldev->dev);
2633
2634 sc = netdev_priv(dev);
2635 sc->sbm_base = sbm_base;
2636
2637 err = sbmac_init(pldev, res->start);
2638 if (err)
2639 goto out_kfree;
2640
2641 return 0;
2642
2643out_kfree:
2644 free_netdev(dev);
2645 __raw_writeq(sbmac_orig_hwaddr, sbm_base + R_MAC_ETHERNET_ADDR);
2646
2647out_unmap:
2648 iounmap(sbm_base);
2649
2650out_out:
2651 return err;
2652}
2653
2654static int __exit sbmac_remove(struct platform_device *pldev)
2655{
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07002656 struct net_device *dev = dev_get_drvdata(&pldev->dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002657 struct sbmac_softc *sc = netdev_priv(dev);
2658
2659 unregister_netdev(dev);
2660 sbmac_uninitctx(sc);
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002661 mdiobus_unregister(sc->mii_bus);
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002662 mdiobus_free(sc->mii_bus);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002663 iounmap(sc->sbm_base);
2664 free_netdev(dev);
2665
2666 return 0;
2667}
2668
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002669static struct platform_driver sbmac_driver = {
2670 .probe = sbmac_probe,
2671 .remove = __exit_p(sbmac_remove),
2672 .driver = {
2673 .name = sbmac_string,
Ralf Baechle33b665e2010-07-06 05:18:11 +00002674 .owner = THIS_MODULE,
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002675 },
2676};
2677
2678static int __init sbmac_init_module(void)
2679{
Sebastian Andrzej Siewior8cd9b132010-04-27 15:54:50 -07002680 return platform_driver_register(&sbmac_driver);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002681}
2682
2683static void __exit sbmac_cleanup_module(void)
2684{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002685 platform_driver_unregister(&sbmac_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686}
2687
2688module_init(sbmac_init_module);
2689module_exit(sbmac_cleanup_module);