Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1 | /* |
Mike Frysinger | 2fb9d6f | 2008-01-30 16:52:24 +0800 | [diff] [blame] | 2 | * Blackfin On-Chip MAC Driver |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 3 | * |
Mike Frysinger | 2fb9d6f | 2008-01-30 16:52:24 +0800 | [diff] [blame] | 4 | * Copyright 2004-2007 Analog Devices Inc. |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 5 | * |
Mike Frysinger | 2fb9d6f | 2008-01-30 16:52:24 +0800 | [diff] [blame] | 6 | * Enter bugs at http://blackfin.uclinux.org/ |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 7 | * |
Mike Frysinger | 2fb9d6f | 2008-01-30 16:52:24 +0800 | [diff] [blame] | 8 | * Licensed under the GPL-2 or later. |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/timer.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/irq.h> |
| 20 | #include <linux/io.h> |
| 21 | #include <linux/ioport.h> |
| 22 | #include <linux/crc32.h> |
| 23 | #include <linux/device.h> |
| 24 | #include <linux/spinlock.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 25 | #include <linux/mii.h> |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 26 | #include <linux/phy.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 27 | #include <linux/netdevice.h> |
| 28 | #include <linux/etherdevice.h> |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 29 | #include <linux/ethtool.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 30 | #include <linux/skbuff.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 31 | #include <linux/platform_device.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 32 | |
| 33 | #include <asm/dma.h> |
| 34 | #include <linux/dma-mapping.h> |
| 35 | |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 36 | #include <asm/div64.h> |
Mike Frysinger | 98f672c | 2010-01-18 21:14:12 +0000 | [diff] [blame] | 37 | #include <asm/dpmc.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 38 | #include <asm/blackfin.h> |
| 39 | #include <asm/cacheflush.h> |
| 40 | #include <asm/portmux.h> |
David Howells | 3dcc1e7 | 2010-10-07 14:08:49 +0100 | [diff] [blame^] | 41 | #include <mach/pll.h> |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 42 | |
| 43 | #include "bfin_mac.h" |
| 44 | |
| 45 | #define DRV_NAME "bfin_mac" |
| 46 | #define DRV_VERSION "1.1" |
| 47 | #define DRV_AUTHOR "Bryan Wu, Luke Yang" |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 48 | #define DRV_DESC "Blackfin on-chip Ethernet MAC driver" |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 49 | |
| 50 | MODULE_AUTHOR(DRV_AUTHOR); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | MODULE_DESCRIPTION(DRV_DESC); |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 53 | MODULE_ALIAS("platform:bfin_mac"); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 54 | |
| 55 | #if defined(CONFIG_BFIN_MAC_USE_L1) |
| 56 | # define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size) |
| 57 | # define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr) |
| 58 | #else |
| 59 | # define bfin_mac_alloc(dma_handle, size) \ |
| 60 | dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL) |
| 61 | # define bfin_mac_free(dma_handle, ptr) \ |
| 62 | dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle) |
| 63 | #endif |
| 64 | |
| 65 | #define PKT_BUF_SZ 1580 |
| 66 | |
| 67 | #define MAX_TIMEOUT_CNT 500 |
| 68 | |
| 69 | /* pointers to maintain transmit list */ |
| 70 | static struct net_dma_desc_tx *tx_list_head; |
| 71 | static struct net_dma_desc_tx *tx_list_tail; |
| 72 | static struct net_dma_desc_rx *rx_list_head; |
| 73 | static struct net_dma_desc_rx *rx_list_tail; |
| 74 | static struct net_dma_desc_rx *current_rx_ptr; |
| 75 | static struct net_dma_desc_tx *current_tx_ptr; |
| 76 | static struct net_dma_desc_tx *tx_desc; |
| 77 | static struct net_dma_desc_rx *rx_desc; |
| 78 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 79 | #if defined(CONFIG_BFIN_MAC_RMII) |
| 80 | static u16 pin_req[] = P_RMII0; |
| 81 | #else |
| 82 | static u16 pin_req[] = P_MII0; |
| 83 | #endif |
| 84 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 85 | static void desc_list_free(void) |
| 86 | { |
| 87 | struct net_dma_desc_rx *r; |
| 88 | struct net_dma_desc_tx *t; |
| 89 | int i; |
| 90 | #if !defined(CONFIG_BFIN_MAC_USE_L1) |
| 91 | dma_addr_t dma_handle = 0; |
| 92 | #endif |
| 93 | |
| 94 | if (tx_desc) { |
| 95 | t = tx_list_head; |
| 96 | for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { |
| 97 | if (t) { |
| 98 | if (t->skb) { |
| 99 | dev_kfree_skb(t->skb); |
| 100 | t->skb = NULL; |
| 101 | } |
| 102 | t = t->next; |
| 103 | } |
| 104 | } |
| 105 | bfin_mac_free(dma_handle, tx_desc); |
| 106 | } |
| 107 | |
| 108 | if (rx_desc) { |
| 109 | r = rx_list_head; |
| 110 | for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { |
| 111 | if (r) { |
| 112 | if (r->skb) { |
| 113 | dev_kfree_skb(r->skb); |
| 114 | r->skb = NULL; |
| 115 | } |
| 116 | r = r->next; |
| 117 | } |
| 118 | } |
| 119 | bfin_mac_free(dma_handle, rx_desc); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | static int desc_list_init(void) |
| 124 | { |
| 125 | int i; |
| 126 | struct sk_buff *new_skb; |
| 127 | #if !defined(CONFIG_BFIN_MAC_USE_L1) |
| 128 | /* |
| 129 | * This dma_handle is useless in Blackfin dma_alloc_coherent(). |
| 130 | * The real dma handler is the return value of dma_alloc_coherent(). |
| 131 | */ |
| 132 | dma_addr_t dma_handle; |
| 133 | #endif |
| 134 | |
| 135 | tx_desc = bfin_mac_alloc(&dma_handle, |
| 136 | sizeof(struct net_dma_desc_tx) * |
| 137 | CONFIG_BFIN_TX_DESC_NUM); |
| 138 | if (tx_desc == NULL) |
| 139 | goto init_error; |
| 140 | |
| 141 | rx_desc = bfin_mac_alloc(&dma_handle, |
| 142 | sizeof(struct net_dma_desc_rx) * |
| 143 | CONFIG_BFIN_RX_DESC_NUM); |
| 144 | if (rx_desc == NULL) |
| 145 | goto init_error; |
| 146 | |
| 147 | /* init tx_list */ |
| 148 | tx_list_head = tx_list_tail = tx_desc; |
| 149 | |
| 150 | for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { |
| 151 | struct net_dma_desc_tx *t = tx_desc + i; |
| 152 | struct dma_descriptor *a = &(t->desc_a); |
| 153 | struct dma_descriptor *b = &(t->desc_b); |
| 154 | |
| 155 | /* |
| 156 | * disable DMA |
| 157 | * read from memory WNR = 0 |
| 158 | * wordsize is 32 bits |
| 159 | * 6 half words is desc size |
| 160 | * large desc flow |
| 161 | */ |
| 162 | a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; |
| 163 | a->start_addr = (unsigned long)t->packet; |
| 164 | a->x_count = 0; |
| 165 | a->next_dma_desc = b; |
| 166 | |
| 167 | /* |
| 168 | * enabled DMA |
| 169 | * write to memory WNR = 1 |
| 170 | * wordsize is 32 bits |
| 171 | * disable interrupt |
| 172 | * 6 half words is desc size |
| 173 | * large desc flow |
| 174 | */ |
| 175 | b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; |
| 176 | b->start_addr = (unsigned long)(&(t->status)); |
| 177 | b->x_count = 0; |
| 178 | |
| 179 | t->skb = NULL; |
| 180 | tx_list_tail->desc_b.next_dma_desc = a; |
| 181 | tx_list_tail->next = t; |
| 182 | tx_list_tail = t; |
| 183 | } |
| 184 | tx_list_tail->next = tx_list_head; /* tx_list is a circle */ |
| 185 | tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a); |
| 186 | current_tx_ptr = tx_list_head; |
| 187 | |
| 188 | /* init rx_list */ |
| 189 | rx_list_head = rx_list_tail = rx_desc; |
| 190 | |
| 191 | for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { |
| 192 | struct net_dma_desc_rx *r = rx_desc + i; |
| 193 | struct dma_descriptor *a = &(r->desc_a); |
| 194 | struct dma_descriptor *b = &(r->desc_b); |
| 195 | |
| 196 | /* allocate a new skb for next time receive */ |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 197 | new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 198 | if (!new_skb) { |
| 199 | printk(KERN_NOTICE DRV_NAME |
| 200 | ": init: low on mem - packet dropped\n"); |
| 201 | goto init_error; |
| 202 | } |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 203 | skb_reserve(new_skb, NET_IP_ALIGN); |
Sonic Zhang | f6e1e4f | 2010-05-10 05:39:08 +0000 | [diff] [blame] | 204 | /* Invidate the data cache of skb->data range when it is write back |
| 205 | * cache. It will prevent overwritting the new data from DMA |
| 206 | */ |
| 207 | blackfin_dcache_invalidate_range((unsigned long)new_skb->head, |
| 208 | (unsigned long)new_skb->end); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 209 | r->skb = new_skb; |
| 210 | |
| 211 | /* |
| 212 | * enabled DMA |
| 213 | * write to memory WNR = 1 |
| 214 | * wordsize is 32 bits |
| 215 | * disable interrupt |
| 216 | * 6 half words is desc size |
| 217 | * large desc flow |
| 218 | */ |
| 219 | a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; |
| 220 | /* since RXDWA is enabled */ |
| 221 | a->start_addr = (unsigned long)new_skb->data - 2; |
| 222 | a->x_count = 0; |
| 223 | a->next_dma_desc = b; |
| 224 | |
| 225 | /* |
| 226 | * enabled DMA |
| 227 | * write to memory WNR = 1 |
| 228 | * wordsize is 32 bits |
| 229 | * enable interrupt |
| 230 | * 6 half words is desc size |
| 231 | * large desc flow |
| 232 | */ |
| 233 | b->config = DMAEN | WNR | WDSIZE_32 | DI_EN | |
| 234 | NDSIZE_6 | DMAFLOW_LARGE; |
| 235 | b->start_addr = (unsigned long)(&(r->status)); |
| 236 | b->x_count = 0; |
| 237 | |
| 238 | rx_list_tail->desc_b.next_dma_desc = a; |
| 239 | rx_list_tail->next = r; |
| 240 | rx_list_tail = r; |
| 241 | } |
| 242 | rx_list_tail->next = rx_list_head; /* rx_list is a circle */ |
| 243 | rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a); |
| 244 | current_rx_ptr = rx_list_head; |
| 245 | |
| 246 | return 0; |
| 247 | |
| 248 | init_error: |
| 249 | desc_list_free(); |
| 250 | printk(KERN_ERR DRV_NAME ": kmalloc failed\n"); |
| 251 | return -ENOMEM; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | /*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ |
| 256 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 257 | /* |
| 258 | * MII operations |
| 259 | */ |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 260 | /* Wait until the previous MDC/MDIO transaction has completed */ |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 261 | static int bfin_mdio_poll(void) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 262 | { |
| 263 | int timeout_cnt = MAX_TIMEOUT_CNT; |
| 264 | |
| 265 | /* poll the STABUSY bit */ |
| 266 | while ((bfin_read_EMAC_STAADD()) & STABUSY) { |
Bryan Wu | 6db9e46 | 2008-01-30 16:52:21 +0800 | [diff] [blame] | 267 | udelay(1); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 268 | if (timeout_cnt-- < 0) { |
| 269 | printk(KERN_ERR DRV_NAME |
| 270 | ": wait MDC/MDIO transaction to complete timeout\n"); |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 271 | return -ETIMEDOUT; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 272 | } |
| 273 | } |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 274 | |
| 275 | return 0; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | /* Read an off-chip register in a PHY through the MDC/MDIO port */ |
Adrian Bunk | 0ed0563 | 2008-10-12 21:15:17 -0700 | [diff] [blame] | 279 | static int bfin_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 280 | { |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 281 | int ret; |
| 282 | |
| 283 | ret = bfin_mdio_poll(); |
| 284 | if (ret) |
| 285 | return ret; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 286 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 287 | /* read mode */ |
| 288 | bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | |
| 289 | SET_REGAD((u16) regnum) | |
| 290 | STABUSY); |
| 291 | |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 292 | ret = bfin_mdio_poll(); |
| 293 | if (ret) |
| 294 | return ret; |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 295 | |
| 296 | return (int) bfin_read_EMAC_STADAT(); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | /* Write an off-chip register in a PHY through the MDC/MDIO port */ |
Adrian Bunk | 0ed0563 | 2008-10-12 21:15:17 -0700 | [diff] [blame] | 300 | static int bfin_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, |
| 301 | u16 value) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 302 | { |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 303 | int ret; |
| 304 | |
| 305 | ret = bfin_mdio_poll(); |
| 306 | if (ret) |
| 307 | return ret; |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 308 | |
| 309 | bfin_write_EMAC_STADAT((u32) value); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 310 | |
| 311 | /* write mode */ |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 312 | bfin_write_EMAC_STAADD(SET_PHYAD((u16) phy_addr) | |
| 313 | SET_REGAD((u16) regnum) | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 314 | STAOP | |
| 315 | STABUSY); |
| 316 | |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 317 | return bfin_mdio_poll(); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 318 | } |
| 319 | |
Adrian Bunk | 0ed0563 | 2008-10-12 21:15:17 -0700 | [diff] [blame] | 320 | static int bfin_mdiobus_reset(struct mii_bus *bus) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 321 | { |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 322 | return 0; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 323 | } |
| 324 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 325 | static void bfin_mac_adjust_link(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 326 | { |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 327 | struct bfin_mac_local *lp = netdev_priv(dev); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 328 | struct phy_device *phydev = lp->phydev; |
| 329 | unsigned long flags; |
| 330 | int new_state = 0; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 331 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 332 | spin_lock_irqsave(&lp->lock, flags); |
| 333 | if (phydev->link) { |
| 334 | /* Now we make sure that we can be in full duplex mode. |
| 335 | * If not, we operate in half-duplex mode. */ |
| 336 | if (phydev->duplex != lp->old_duplex) { |
| 337 | u32 opmode = bfin_read_EMAC_OPMODE(); |
| 338 | new_state = 1; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 339 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 340 | if (phydev->duplex) |
| 341 | opmode |= FDMODE; |
| 342 | else |
| 343 | opmode &= ~(FDMODE); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 344 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 345 | bfin_write_EMAC_OPMODE(opmode); |
| 346 | lp->old_duplex = phydev->duplex; |
| 347 | } |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 348 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 349 | if (phydev->speed != lp->old_speed) { |
| 350 | #if defined(CONFIG_BFIN_MAC_RMII) |
| 351 | u32 opmode = bfin_read_EMAC_OPMODE(); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 352 | switch (phydev->speed) { |
| 353 | case 10: |
| 354 | opmode |= RMII_10; |
| 355 | break; |
| 356 | case 100: |
| 357 | opmode &= ~(RMII_10); |
| 358 | break; |
| 359 | default: |
| 360 | printk(KERN_WARNING |
| 361 | "%s: Ack! Speed (%d) is not 10/100!\n", |
| 362 | DRV_NAME, phydev->speed); |
| 363 | break; |
| 364 | } |
| 365 | bfin_write_EMAC_OPMODE(opmode); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 366 | #endif |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 367 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 368 | new_state = 1; |
| 369 | lp->old_speed = phydev->speed; |
| 370 | } |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 371 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 372 | if (!lp->old_link) { |
| 373 | new_state = 1; |
| 374 | lp->old_link = 1; |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 375 | } |
| 376 | } else if (lp->old_link) { |
| 377 | new_state = 1; |
| 378 | lp->old_link = 0; |
| 379 | lp->old_speed = 0; |
| 380 | lp->old_duplex = -1; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 381 | } |
| 382 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 383 | if (new_state) { |
| 384 | u32 opmode = bfin_read_EMAC_OPMODE(); |
| 385 | phy_print_status(phydev); |
| 386 | pr_debug("EMAC_OPMODE = 0x%08x\n", opmode); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 387 | } |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 388 | |
| 389 | spin_unlock_irqrestore(&lp->lock, flags); |
| 390 | } |
| 391 | |
Bryan Wu | 7cc8f38 | 2008-01-30 16:52:22 +0800 | [diff] [blame] | 392 | /* MDC = 2.5 MHz */ |
| 393 | #define MDC_CLK 2500000 |
| 394 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 395 | static int mii_probe(struct net_device *dev) |
| 396 | { |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 397 | struct bfin_mac_local *lp = netdev_priv(dev); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 398 | struct phy_device *phydev = NULL; |
| 399 | unsigned short sysctl; |
| 400 | int i; |
Bryan Wu | 7cc8f38 | 2008-01-30 16:52:22 +0800 | [diff] [blame] | 401 | u32 sclk, mdc_div; |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 402 | |
| 403 | /* Enable PHY output early */ |
Mike Frysinger | 98f672c | 2010-01-18 21:14:12 +0000 | [diff] [blame] | 404 | if (!(bfin_read_VR_CTL() & CLKBUFOE)) |
| 405 | bfin_write_VR_CTL(bfin_read_VR_CTL() | CLKBUFOE); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 406 | |
Bryan Wu | 7cc8f38 | 2008-01-30 16:52:22 +0800 | [diff] [blame] | 407 | sclk = get_sclk(); |
| 408 | mdc_div = ((sclk / MDC_CLK) / 2) - 1; |
| 409 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 410 | sysctl = bfin_read_EMAC_SYSCTL(); |
Bryan Wu | 9dc7f30 | 2008-01-30 16:52:28 +0800 | [diff] [blame] | 411 | sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 412 | bfin_write_EMAC_SYSCTL(sysctl); |
| 413 | |
| 414 | /* search for connect PHY device */ |
| 415 | for (i = 0; i < PHY_MAX_ADDR; i++) { |
Lennert Buytenhek | 298cf9b | 2008-10-08 16:29:57 -0700 | [diff] [blame] | 416 | struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i]; |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 417 | |
| 418 | if (!tmp_phydev) |
| 419 | continue; /* no PHY here... */ |
| 420 | |
| 421 | phydev = tmp_phydev; |
| 422 | break; /* found it */ |
| 423 | } |
| 424 | |
| 425 | /* now we are supposed to have a proper phydev, to attach to... */ |
| 426 | if (!phydev) { |
| 427 | printk(KERN_INFO "%s: Don't found any phy device at all\n", |
| 428 | dev->name); |
| 429 | return -ENODEV; |
| 430 | } |
| 431 | |
| 432 | #if defined(CONFIG_BFIN_MAC_RMII) |
Kay Sievers | c231355 | 2009-03-24 16:38:22 -0700 | [diff] [blame] | 433 | phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, |
| 434 | 0, PHY_INTERFACE_MODE_RMII); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 435 | #else |
Kay Sievers | c231355 | 2009-03-24 16:38:22 -0700 | [diff] [blame] | 436 | phydev = phy_connect(dev, dev_name(&phydev->dev), &bfin_mac_adjust_link, |
| 437 | 0, PHY_INTERFACE_MODE_MII); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 438 | #endif |
| 439 | |
| 440 | if (IS_ERR(phydev)) { |
| 441 | printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); |
| 442 | return PTR_ERR(phydev); |
| 443 | } |
| 444 | |
| 445 | /* mask with MAC supported features */ |
| 446 | phydev->supported &= (SUPPORTED_10baseT_Half |
| 447 | | SUPPORTED_10baseT_Full |
| 448 | | SUPPORTED_100baseT_Half |
| 449 | | SUPPORTED_100baseT_Full |
| 450 | | SUPPORTED_Autoneg |
| 451 | | SUPPORTED_Pause | SUPPORTED_Asym_Pause |
| 452 | | SUPPORTED_MII |
| 453 | | SUPPORTED_TP); |
| 454 | |
| 455 | phydev->advertising = phydev->supported; |
| 456 | |
| 457 | lp->old_link = 0; |
| 458 | lp->old_speed = 0; |
| 459 | lp->old_duplex = -1; |
| 460 | lp->phydev = phydev; |
| 461 | |
| 462 | printk(KERN_INFO "%s: attached PHY driver [%s] " |
Bryan Wu | 7cc8f38 | 2008-01-30 16:52:22 +0800 | [diff] [blame] | 463 | "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)" |
| 464 | "@sclk=%dMHz)\n", |
Kay Sievers | c231355 | 2009-03-24 16:38:22 -0700 | [diff] [blame] | 465 | DRV_NAME, phydev->drv->name, dev_name(&phydev->dev), phydev->irq, |
Bryan Wu | 7cc8f38 | 2008-01-30 16:52:22 +0800 | [diff] [blame] | 466 | MDC_CLK, mdc_div, sclk/1000000); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 467 | |
| 468 | return 0; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 469 | } |
| 470 | |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 471 | /* |
| 472 | * Ethtool support |
| 473 | */ |
| 474 | |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 475 | /* |
| 476 | * interrupt routine for magic packet wakeup |
| 477 | */ |
| 478 | static irqreturn_t bfin_mac_wake_interrupt(int irq, void *dev_id) |
| 479 | { |
| 480 | return IRQ_HANDLED; |
| 481 | } |
| 482 | |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 483 | static int |
| 484 | bfin_mac_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 485 | { |
| 486 | struct bfin_mac_local *lp = netdev_priv(dev); |
| 487 | |
| 488 | if (lp->phydev) |
| 489 | return phy_ethtool_gset(lp->phydev, cmd); |
| 490 | |
| 491 | return -EINVAL; |
| 492 | } |
| 493 | |
| 494 | static int |
| 495 | bfin_mac_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 496 | { |
| 497 | struct bfin_mac_local *lp = netdev_priv(dev); |
| 498 | |
| 499 | if (!capable(CAP_NET_ADMIN)) |
| 500 | return -EPERM; |
| 501 | |
| 502 | if (lp->phydev) |
| 503 | return phy_ethtool_sset(lp->phydev, cmd); |
| 504 | |
| 505 | return -EINVAL; |
| 506 | } |
| 507 | |
| 508 | static void bfin_mac_ethtool_getdrvinfo(struct net_device *dev, |
| 509 | struct ethtool_drvinfo *info) |
| 510 | { |
| 511 | strcpy(info->driver, DRV_NAME); |
| 512 | strcpy(info->version, DRV_VERSION); |
| 513 | strcpy(info->fw_version, "N/A"); |
Kay Sievers | c231355 | 2009-03-24 16:38:22 -0700 | [diff] [blame] | 514 | strcpy(info->bus_info, dev_name(&dev->dev)); |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 515 | } |
| 516 | |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 517 | static void bfin_mac_ethtool_getwol(struct net_device *dev, |
| 518 | struct ethtool_wolinfo *wolinfo) |
| 519 | { |
| 520 | struct bfin_mac_local *lp = netdev_priv(dev); |
| 521 | |
| 522 | wolinfo->supported = WAKE_MAGIC; |
| 523 | wolinfo->wolopts = lp->wol; |
| 524 | } |
| 525 | |
| 526 | static int bfin_mac_ethtool_setwol(struct net_device *dev, |
| 527 | struct ethtool_wolinfo *wolinfo) |
| 528 | { |
| 529 | struct bfin_mac_local *lp = netdev_priv(dev); |
| 530 | int rc; |
| 531 | |
| 532 | if (wolinfo->wolopts & (WAKE_MAGICSECURE | |
| 533 | WAKE_UCAST | |
| 534 | WAKE_MCAST | |
| 535 | WAKE_BCAST | |
| 536 | WAKE_ARP)) |
| 537 | return -EOPNOTSUPP; |
| 538 | |
| 539 | lp->wol = wolinfo->wolopts; |
| 540 | |
| 541 | if (lp->wol && !lp->irq_wake_requested) { |
| 542 | /* register wake irq handler */ |
| 543 | rc = request_irq(IRQ_MAC_WAKEDET, bfin_mac_wake_interrupt, |
| 544 | IRQF_DISABLED, "EMAC_WAKE", dev); |
| 545 | if (rc) |
| 546 | return rc; |
| 547 | lp->irq_wake_requested = true; |
| 548 | } |
| 549 | |
| 550 | if (!lp->wol && lp->irq_wake_requested) { |
| 551 | free_irq(IRQ_MAC_WAKEDET, dev); |
| 552 | lp->irq_wake_requested = false; |
| 553 | } |
| 554 | |
| 555 | /* Make sure the PHY driver doesn't suspend */ |
| 556 | device_init_wakeup(&dev->dev, lp->wol); |
| 557 | |
| 558 | return 0; |
| 559 | } |
| 560 | |
Stephen Hemminger | 0fc0b73 | 2009-09-02 01:03:33 -0700 | [diff] [blame] | 561 | static const struct ethtool_ops bfin_mac_ethtool_ops = { |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 562 | .get_settings = bfin_mac_ethtool_getsettings, |
| 563 | .set_settings = bfin_mac_ethtool_setsettings, |
| 564 | .get_link = ethtool_op_get_link, |
| 565 | .get_drvinfo = bfin_mac_ethtool_getdrvinfo, |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 566 | .get_wol = bfin_mac_ethtool_getwol, |
| 567 | .set_wol = bfin_mac_ethtool_setwol, |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 568 | }; |
| 569 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 570 | /**************************************************************************/ |
| 571 | void setup_system_regs(struct net_device *dev) |
| 572 | { |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 573 | unsigned short sysctl; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 574 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 575 | /* |
| 576 | * Odd word alignment for Receive Frame DMA word |
| 577 | * Configure checksum support and rcve frame word alignment |
| 578 | */ |
| 579 | sysctl = bfin_read_EMAC_SYSCTL(); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 580 | sysctl |= RXDWA; |
Sonic Zhang | 812a9de | 2010-05-10 05:39:10 +0000 | [diff] [blame] | 581 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
| 582 | sysctl |= RXCKS; |
| 583 | #else |
| 584 | sysctl &= ~RXCKS; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 585 | #endif |
| 586 | bfin_write_EMAC_SYSCTL(sysctl); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 587 | |
| 588 | bfin_write_EMAC_MMC_CTL(RSTC | CROLL); |
| 589 | |
| 590 | /* Initialize the TX DMA channel registers */ |
| 591 | bfin_write_DMA2_X_COUNT(0); |
| 592 | bfin_write_DMA2_X_MODIFY(4); |
| 593 | bfin_write_DMA2_Y_COUNT(0); |
| 594 | bfin_write_DMA2_Y_MODIFY(0); |
| 595 | |
| 596 | /* Initialize the RX DMA channel registers */ |
| 597 | bfin_write_DMA1_X_COUNT(0); |
| 598 | bfin_write_DMA1_X_MODIFY(4); |
| 599 | bfin_write_DMA1_Y_COUNT(0); |
| 600 | bfin_write_DMA1_Y_MODIFY(0); |
| 601 | } |
| 602 | |
Alex Landau | 73f8318 | 2007-09-19 23:14:18 +0800 | [diff] [blame] | 603 | static void setup_mac_addr(u8 *mac_addr) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 604 | { |
| 605 | u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]); |
| 606 | u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]); |
| 607 | |
| 608 | /* this depends on a little-endian machine */ |
| 609 | bfin_write_EMAC_ADDRLO(addr_low); |
| 610 | bfin_write_EMAC_ADDRHI(addr_hi); |
| 611 | } |
| 612 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 613 | static int bfin_mac_set_mac_address(struct net_device *dev, void *p) |
Alex Landau | 73f8318 | 2007-09-19 23:14:18 +0800 | [diff] [blame] | 614 | { |
| 615 | struct sockaddr *addr = p; |
| 616 | if (netif_running(dev)) |
| 617 | return -EBUSY; |
| 618 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| 619 | setup_mac_addr(dev->dev_addr); |
| 620 | return 0; |
| 621 | } |
| 622 | |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 623 | #ifdef CONFIG_BFIN_MAC_USE_HWSTAMP |
| 624 | #define bfin_mac_hwtstamp_is_none(cfg) ((cfg) == HWTSTAMP_FILTER_NONE) |
| 625 | |
| 626 | static int bfin_mac_hwtstamp_ioctl(struct net_device *netdev, |
| 627 | struct ifreq *ifr, int cmd) |
| 628 | { |
| 629 | struct hwtstamp_config config; |
| 630 | struct bfin_mac_local *lp = netdev_priv(netdev); |
| 631 | u16 ptpctl; |
| 632 | u32 ptpfv1, ptpfv2, ptpfv3, ptpfoff; |
| 633 | |
| 634 | if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) |
| 635 | return -EFAULT; |
| 636 | |
| 637 | pr_debug("%s config flag:0x%x, tx_type:0x%x, rx_filter:0x%x\n", |
| 638 | __func__, config.flags, config.tx_type, config.rx_filter); |
| 639 | |
| 640 | /* reserved for future extensions */ |
| 641 | if (config.flags) |
| 642 | return -EINVAL; |
| 643 | |
| 644 | if ((config.tx_type != HWTSTAMP_TX_OFF) && |
| 645 | (config.tx_type != HWTSTAMP_TX_ON)) |
| 646 | return -ERANGE; |
| 647 | |
| 648 | ptpctl = bfin_read_EMAC_PTP_CTL(); |
| 649 | |
| 650 | switch (config.rx_filter) { |
| 651 | case HWTSTAMP_FILTER_NONE: |
| 652 | /* |
| 653 | * Dont allow any timestamping |
| 654 | */ |
| 655 | ptpfv3 = 0xFFFFFFFF; |
| 656 | bfin_write_EMAC_PTP_FV3(ptpfv3); |
| 657 | break; |
| 658 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: |
| 659 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: |
| 660 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: |
| 661 | /* |
| 662 | * Clear the five comparison mask bits (bits[12:8]) in EMAC_PTP_CTL) |
| 663 | * to enable all the field matches. |
| 664 | */ |
| 665 | ptpctl &= ~0x1F00; |
| 666 | bfin_write_EMAC_PTP_CTL(ptpctl); |
| 667 | /* |
| 668 | * Keep the default values of the EMAC_PTP_FOFF register. |
| 669 | */ |
| 670 | ptpfoff = 0x4A24170C; |
| 671 | bfin_write_EMAC_PTP_FOFF(ptpfoff); |
| 672 | /* |
| 673 | * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 |
| 674 | * registers. |
| 675 | */ |
| 676 | ptpfv1 = 0x11040800; |
| 677 | bfin_write_EMAC_PTP_FV1(ptpfv1); |
| 678 | ptpfv2 = 0x0140013F; |
| 679 | bfin_write_EMAC_PTP_FV2(ptpfv2); |
| 680 | /* |
| 681 | * The default value (0xFFFC) allows the timestamping of both |
| 682 | * received Sync messages and Delay_Req messages. |
| 683 | */ |
| 684 | ptpfv3 = 0xFFFFFFFC; |
| 685 | bfin_write_EMAC_PTP_FV3(ptpfv3); |
| 686 | |
| 687 | config.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT; |
| 688 | break; |
| 689 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: |
| 690 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: |
| 691 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: |
| 692 | /* Clear all five comparison mask bits (bits[12:8]) in the |
| 693 | * EMAC_PTP_CTL register to enable all the field matches. |
| 694 | */ |
| 695 | ptpctl &= ~0x1F00; |
| 696 | bfin_write_EMAC_PTP_CTL(ptpctl); |
| 697 | /* |
| 698 | * Keep the default values of the EMAC_PTP_FOFF register, except set |
| 699 | * the PTPCOF field to 0x2A. |
| 700 | */ |
| 701 | ptpfoff = 0x2A24170C; |
| 702 | bfin_write_EMAC_PTP_FOFF(ptpfoff); |
| 703 | /* |
| 704 | * Keep the default values of the EMAC_PTP_FV1 and EMAC_PTP_FV2 |
| 705 | * registers. |
| 706 | */ |
| 707 | ptpfv1 = 0x11040800; |
| 708 | bfin_write_EMAC_PTP_FV1(ptpfv1); |
| 709 | ptpfv2 = 0x0140013F; |
| 710 | bfin_write_EMAC_PTP_FV2(ptpfv2); |
| 711 | /* |
| 712 | * To allow the timestamping of Pdelay_Req and Pdelay_Resp, set |
| 713 | * the value to 0xFFF0. |
| 714 | */ |
| 715 | ptpfv3 = 0xFFFFFFF0; |
| 716 | bfin_write_EMAC_PTP_FV3(ptpfv3); |
| 717 | |
| 718 | config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT; |
| 719 | break; |
| 720 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: |
| 721 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: |
| 722 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: |
| 723 | /* |
| 724 | * Clear bits 8 and 12 of the EMAC_PTP_CTL register to enable only the |
| 725 | * EFTM and PTPCM field comparison. |
| 726 | */ |
| 727 | ptpctl &= ~0x1100; |
| 728 | bfin_write_EMAC_PTP_CTL(ptpctl); |
| 729 | /* |
| 730 | * Keep the default values of all the fields of the EMAC_PTP_FOFF |
| 731 | * register, except set the PTPCOF field to 0x0E. |
| 732 | */ |
| 733 | ptpfoff = 0x0E24170C; |
| 734 | bfin_write_EMAC_PTP_FOFF(ptpfoff); |
| 735 | /* |
| 736 | * Program bits [15:0] of the EMAC_PTP_FV1 register to 0x88F7, which |
| 737 | * corresponds to PTP messages on the MAC layer. |
| 738 | */ |
| 739 | ptpfv1 = 0x110488F7; |
| 740 | bfin_write_EMAC_PTP_FV1(ptpfv1); |
| 741 | ptpfv2 = 0x0140013F; |
| 742 | bfin_write_EMAC_PTP_FV2(ptpfv2); |
| 743 | /* |
| 744 | * To allow the timestamping of Pdelay_Req and Pdelay_Resp |
| 745 | * messages, set the value to 0xFFF0. |
| 746 | */ |
| 747 | ptpfv3 = 0xFFFFFFF0; |
| 748 | bfin_write_EMAC_PTP_FV3(ptpfv3); |
| 749 | |
| 750 | config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; |
| 751 | break; |
| 752 | default: |
| 753 | return -ERANGE; |
| 754 | } |
| 755 | |
| 756 | if (config.tx_type == HWTSTAMP_TX_OFF && |
| 757 | bfin_mac_hwtstamp_is_none(config.rx_filter)) { |
| 758 | ptpctl &= ~PTP_EN; |
| 759 | bfin_write_EMAC_PTP_CTL(ptpctl); |
| 760 | |
| 761 | SSYNC(); |
| 762 | } else { |
| 763 | ptpctl |= PTP_EN; |
| 764 | bfin_write_EMAC_PTP_CTL(ptpctl); |
| 765 | |
| 766 | /* |
| 767 | * clear any existing timestamp |
| 768 | */ |
| 769 | bfin_read_EMAC_PTP_RXSNAPLO(); |
| 770 | bfin_read_EMAC_PTP_RXSNAPHI(); |
| 771 | |
| 772 | bfin_read_EMAC_PTP_TXSNAPLO(); |
| 773 | bfin_read_EMAC_PTP_TXSNAPHI(); |
| 774 | |
| 775 | /* |
| 776 | * Set registers so that rollover occurs soon to test this. |
| 777 | */ |
| 778 | bfin_write_EMAC_PTP_TIMELO(0x00000000); |
| 779 | bfin_write_EMAC_PTP_TIMEHI(0xFF800000); |
| 780 | |
| 781 | SSYNC(); |
| 782 | |
| 783 | lp->compare.last_update = 0; |
| 784 | timecounter_init(&lp->clock, |
| 785 | &lp->cycles, |
| 786 | ktime_to_ns(ktime_get_real())); |
| 787 | timecompare_update(&lp->compare, 0); |
| 788 | } |
| 789 | |
| 790 | lp->stamp_cfg = config; |
| 791 | return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? |
| 792 | -EFAULT : 0; |
| 793 | } |
| 794 | |
| 795 | static void bfin_dump_hwtamp(char *s, ktime_t *hw, ktime_t *ts, struct timecompare *cmp) |
| 796 | { |
| 797 | ktime_t sys = ktime_get_real(); |
| 798 | |
| 799 | pr_debug("%s %s hardware:%d,%d transform system:%d,%d system:%d,%d, cmp:%lld, %lld\n", |
| 800 | __func__, s, hw->tv.sec, hw->tv.nsec, ts->tv.sec, ts->tv.nsec, sys.tv.sec, |
| 801 | sys.tv.nsec, cmp->offset, cmp->skew); |
| 802 | } |
| 803 | |
| 804 | static void bfin_tx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) |
| 805 | { |
| 806 | struct bfin_mac_local *lp = netdev_priv(netdev); |
| 807 | union skb_shared_tx *shtx = skb_tx(skb); |
| 808 | |
| 809 | if (shtx->hardware) { |
| 810 | int timeout_cnt = MAX_TIMEOUT_CNT; |
| 811 | |
| 812 | /* When doing time stamping, keep the connection to the socket |
| 813 | * a while longer |
| 814 | */ |
| 815 | shtx->in_progress = 1; |
| 816 | |
| 817 | /* |
| 818 | * The timestamping is done at the EMAC module's MII/RMII interface |
| 819 | * when the module sees the Start of Frame of an event message packet. This |
| 820 | * interface is the closest possible place to the physical Ethernet transmission |
| 821 | * medium, providing the best timing accuracy. |
| 822 | */ |
| 823 | while ((!(bfin_read_EMAC_PTP_ISTAT() & TXTL)) && (--timeout_cnt)) |
| 824 | udelay(1); |
| 825 | if (timeout_cnt == 0) |
| 826 | printk(KERN_ERR DRV_NAME |
| 827 | ": fails to timestamp the TX packet\n"); |
| 828 | else { |
| 829 | struct skb_shared_hwtstamps shhwtstamps; |
| 830 | u64 ns; |
| 831 | u64 regval; |
| 832 | |
| 833 | regval = bfin_read_EMAC_PTP_TXSNAPLO(); |
| 834 | regval |= (u64)bfin_read_EMAC_PTP_TXSNAPHI() << 32; |
| 835 | memset(&shhwtstamps, 0, sizeof(shhwtstamps)); |
| 836 | ns = timecounter_cyc2time(&lp->clock, |
| 837 | regval); |
| 838 | timecompare_update(&lp->compare, ns); |
| 839 | shhwtstamps.hwtstamp = ns_to_ktime(ns); |
| 840 | shhwtstamps.syststamp = |
| 841 | timecompare_transform(&lp->compare, ns); |
| 842 | skb_tstamp_tx(skb, &shhwtstamps); |
| 843 | |
| 844 | bfin_dump_hwtamp("TX", &shhwtstamps.hwtstamp, &shhwtstamps.syststamp, &lp->compare); |
| 845 | } |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | static void bfin_rx_hwtstamp(struct net_device *netdev, struct sk_buff *skb) |
| 850 | { |
| 851 | struct bfin_mac_local *lp = netdev_priv(netdev); |
| 852 | u32 valid; |
| 853 | u64 regval, ns; |
| 854 | struct skb_shared_hwtstamps *shhwtstamps; |
| 855 | |
| 856 | if (bfin_mac_hwtstamp_is_none(lp->stamp_cfg.rx_filter)) |
| 857 | return; |
| 858 | |
| 859 | valid = bfin_read_EMAC_PTP_ISTAT() & RXEL; |
| 860 | if (!valid) |
| 861 | return; |
| 862 | |
| 863 | shhwtstamps = skb_hwtstamps(skb); |
| 864 | |
| 865 | regval = bfin_read_EMAC_PTP_RXSNAPLO(); |
| 866 | regval |= (u64)bfin_read_EMAC_PTP_RXSNAPHI() << 32; |
| 867 | ns = timecounter_cyc2time(&lp->clock, regval); |
| 868 | timecompare_update(&lp->compare, ns); |
| 869 | memset(shhwtstamps, 0, sizeof(*shhwtstamps)); |
| 870 | shhwtstamps->hwtstamp = ns_to_ktime(ns); |
| 871 | shhwtstamps->syststamp = timecompare_transform(&lp->compare, ns); |
| 872 | |
| 873 | bfin_dump_hwtamp("RX", &shhwtstamps->hwtstamp, &shhwtstamps->syststamp, &lp->compare); |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * bfin_read_clock - read raw cycle counter (to be used by time counter) |
| 878 | */ |
| 879 | static cycle_t bfin_read_clock(const struct cyclecounter *tc) |
| 880 | { |
| 881 | u64 stamp; |
| 882 | |
| 883 | stamp = bfin_read_EMAC_PTP_TIMELO(); |
| 884 | stamp |= (u64)bfin_read_EMAC_PTP_TIMEHI() << 32ULL; |
| 885 | |
| 886 | return stamp; |
| 887 | } |
| 888 | |
| 889 | #define PTP_CLK 25000000 |
| 890 | |
| 891 | static void bfin_mac_hwtstamp_init(struct net_device *netdev) |
| 892 | { |
| 893 | struct bfin_mac_local *lp = netdev_priv(netdev); |
| 894 | u64 append; |
| 895 | |
| 896 | /* Initialize hardware timer */ |
| 897 | append = PTP_CLK * (1ULL << 32); |
| 898 | do_div(append, get_sclk()); |
| 899 | bfin_write_EMAC_PTP_ADDEND((u32)append); |
| 900 | |
| 901 | memset(&lp->cycles, 0, sizeof(lp->cycles)); |
| 902 | lp->cycles.read = bfin_read_clock; |
| 903 | lp->cycles.mask = CLOCKSOURCE_MASK(64); |
| 904 | lp->cycles.mult = 1000000000 / PTP_CLK; |
| 905 | lp->cycles.shift = 0; |
| 906 | |
| 907 | /* Synchronize our NIC clock against system wall clock */ |
| 908 | memset(&lp->compare, 0, sizeof(lp->compare)); |
| 909 | lp->compare.source = &lp->clock; |
| 910 | lp->compare.target = ktime_get_real; |
| 911 | lp->compare.num_samples = 10; |
| 912 | |
| 913 | /* Initialize hwstamp config */ |
| 914 | lp->stamp_cfg.rx_filter = HWTSTAMP_FILTER_NONE; |
| 915 | lp->stamp_cfg.tx_type = HWTSTAMP_TX_OFF; |
| 916 | } |
| 917 | |
| 918 | #else |
| 919 | # define bfin_mac_hwtstamp_is_none(cfg) 0 |
| 920 | # define bfin_mac_hwtstamp_init(dev) |
| 921 | # define bfin_mac_hwtstamp_ioctl(dev, ifr, cmd) (-EOPNOTSUPP) |
| 922 | # define bfin_rx_hwtstamp(dev, skb) |
| 923 | # define bfin_tx_hwtstamp(dev, skb) |
| 924 | #endif |
| 925 | |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 926 | static inline void _tx_reclaim_skb(void) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 927 | { |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 928 | do { |
| 929 | tx_list_head->desc_a.config &= ~DMAEN; |
| 930 | tx_list_head->status.status_word = 0; |
| 931 | if (tx_list_head->skb) { |
| 932 | dev_kfree_skb(tx_list_head->skb); |
| 933 | tx_list_head->skb = NULL; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 934 | } |
| 935 | tx_list_head = tx_list_head->next; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 936 | |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 937 | } while (tx_list_head->status.status_word != 0); |
| 938 | } |
| 939 | |
| 940 | static void tx_reclaim_skb(struct bfin_mac_local *lp) |
| 941 | { |
| 942 | int timeout_cnt = MAX_TIMEOUT_CNT; |
| 943 | |
| 944 | if (tx_list_head->status.status_word != 0) |
| 945 | _tx_reclaim_skb(); |
| 946 | |
| 947 | if (current_tx_ptr->next == tx_list_head) { |
| 948 | while (tx_list_head->status.status_word == 0) { |
| 949 | /* slow down polling to avoid too many queue stop. */ |
| 950 | udelay(10); |
| 951 | /* reclaim skb if DMA is not running. */ |
| 952 | if (!(bfin_read_DMA2_IRQ_STATUS() & DMA_RUN)) |
| 953 | break; |
| 954 | if (timeout_cnt-- < 0) |
| 955 | break; |
| 956 | } |
| 957 | |
| 958 | if (timeout_cnt >= 0) |
| 959 | _tx_reclaim_skb(); |
| 960 | else |
| 961 | netif_stop_queue(lp->ndev); |
| 962 | } |
| 963 | |
| 964 | if (current_tx_ptr->next != tx_list_head && |
| 965 | netif_queue_stopped(lp->ndev)) |
| 966 | netif_wake_queue(lp->ndev); |
| 967 | |
| 968 | if (tx_list_head != current_tx_ptr) { |
| 969 | /* shorten the timer interval if tx queue is stopped */ |
| 970 | if (netif_queue_stopped(lp->ndev)) |
| 971 | lp->tx_reclaim_timer.expires = |
| 972 | jiffies + (TX_RECLAIM_JIFFIES >> 4); |
| 973 | else |
| 974 | lp->tx_reclaim_timer.expires = |
| 975 | jiffies + TX_RECLAIM_JIFFIES; |
| 976 | |
| 977 | mod_timer(&lp->tx_reclaim_timer, |
| 978 | lp->tx_reclaim_timer.expires); |
| 979 | } |
| 980 | |
| 981 | return; |
| 982 | } |
| 983 | |
| 984 | static void tx_reclaim_skb_timeout(unsigned long lp) |
| 985 | { |
| 986 | tx_reclaim_skb((struct bfin_mac_local *)lp); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 987 | } |
| 988 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 989 | static int bfin_mac_hard_start_xmit(struct sk_buff *skb, |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 990 | struct net_device *dev) |
| 991 | { |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 992 | struct bfin_mac_local *lp = netdev_priv(dev); |
Bryan Wu | a50c0c0 | 2008-07-27 22:45:04 +0800 | [diff] [blame] | 993 | u16 *data; |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 994 | u32 data_align = (unsigned long)(skb->data) & 0x3; |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 995 | union skb_shared_tx *shtx = skb_tx(skb); |
| 996 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 997 | current_tx_ptr->skb = skb; |
| 998 | |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 999 | if (data_align == 0x2) { |
| 1000 | /* move skb->data to current_tx_ptr payload */ |
| 1001 | data = (u16 *)(skb->data) - 1; |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1002 | *data = (u16)(skb->len); |
| 1003 | /* |
| 1004 | * When transmitting an Ethernet packet, the PTP_TSYNC module requires |
| 1005 | * a DMA_Length_Word field associated with the packet. The lower 12 bits |
| 1006 | * of this field are the length of the packet payload in bytes and the higher |
| 1007 | * 4 bits are the timestamping enable field. |
| 1008 | */ |
| 1009 | if (shtx->hardware) |
| 1010 | *data |= 0x1000; |
| 1011 | |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1012 | current_tx_ptr->desc_a.start_addr = (u32)data; |
| 1013 | /* this is important! */ |
| 1014 | blackfin_dcache_flush_range((u32)data, |
| 1015 | (u32)((u8 *)data + skb->len + 4)); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1016 | } else { |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1017 | *((u16 *)(current_tx_ptr->packet)) = (u16)(skb->len); |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1018 | /* enable timestamping for the sent packet */ |
| 1019 | if (shtx->hardware) |
| 1020 | *((u16 *)(current_tx_ptr->packet)) |= 0x1000; |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1021 | memcpy((u8 *)(current_tx_ptr->packet + 2), skb->data, |
| 1022 | skb->len); |
| 1023 | current_tx_ptr->desc_a.start_addr = |
| 1024 | (u32)current_tx_ptr->packet; |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1025 | blackfin_dcache_flush_range( |
| 1026 | (u32)current_tx_ptr->packet, |
| 1027 | (u32)(current_tx_ptr->packet + skb->len + 2)); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1028 | } |
| 1029 | |
Sonic Zhang | 805a8ab | 2009-05-29 03:40:43 +0000 | [diff] [blame] | 1030 | /* make sure the internal data buffers in the core are drained |
| 1031 | * so that the DMA descriptors are completely written when the |
| 1032 | * DMA engine goes to fetch them below |
| 1033 | */ |
| 1034 | SSYNC(); |
| 1035 | |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1036 | /* always clear status buffer before start tx dma */ |
| 1037 | current_tx_ptr->status.status_word = 0; |
| 1038 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1039 | /* enable this packet's dma */ |
| 1040 | current_tx_ptr->desc_a.config |= DMAEN; |
| 1041 | |
| 1042 | /* tx dma is running, just return */ |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1043 | if (bfin_read_DMA2_IRQ_STATUS() & DMA_RUN) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1044 | goto out; |
| 1045 | |
| 1046 | /* tx dma is not running */ |
| 1047 | bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a)); |
| 1048 | /* dma enabled, read from memory, size is 6 */ |
| 1049 | bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config); |
| 1050 | /* Turn on the EMAC tx */ |
| 1051 | bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); |
| 1052 | |
| 1053 | out: |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1054 | bfin_tx_hwtstamp(dev, skb); |
| 1055 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1056 | current_tx_ptr = current_tx_ptr->next; |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1057 | dev->stats.tx_packets++; |
| 1058 | dev->stats.tx_bytes += (skb->len); |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1059 | |
| 1060 | tx_reclaim_skb(lp); |
| 1061 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 1062 | return NETDEV_TX_OK; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1063 | } |
| 1064 | |
Sonic Zhang | ad2864d | 2010-05-10 05:39:09 +0000 | [diff] [blame] | 1065 | #define IP_HEADER_OFF 0 |
Peter Meerwald | ec497b3 | 2010-05-17 17:20:50 -0700 | [diff] [blame] | 1066 | #define RX_ERROR_MASK (RX_LONG | RX_ALIGN | RX_CRC | RX_LEN | \ |
| 1067 | RX_FRAG | RX_ADDR | RX_DMAO | RX_PHY | RX_LATE | RX_RANGE) |
| 1068 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1069 | static void bfin_mac_rx(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1070 | { |
| 1071 | struct sk_buff *skb, *new_skb; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1072 | unsigned short len; |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1073 | struct bfin_mac_local *lp __maybe_unused = netdev_priv(dev); |
Sonic Zhang | ad2864d | 2010-05-10 05:39:09 +0000 | [diff] [blame] | 1074 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
| 1075 | unsigned int i; |
| 1076 | unsigned char fcs[ETH_FCS_LEN + 1]; |
| 1077 | #endif |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1078 | |
Peter Meerwald | ec497b3 | 2010-05-17 17:20:50 -0700 | [diff] [blame] | 1079 | /* check if frame status word reports an error condition |
| 1080 | * we which case we simply drop the packet |
| 1081 | */ |
| 1082 | if (current_rx_ptr->status.status_word & RX_ERROR_MASK) { |
| 1083 | printk(KERN_NOTICE DRV_NAME |
| 1084 | ": rx: receive error - packet dropped\n"); |
| 1085 | dev->stats.rx_dropped++; |
| 1086 | goto out; |
| 1087 | } |
| 1088 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1089 | /* allocate a new skb for next time receive */ |
| 1090 | skb = current_rx_ptr->skb; |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1091 | |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1092 | new_skb = dev_alloc_skb(PKT_BUF_SZ + NET_IP_ALIGN); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1093 | if (!new_skb) { |
| 1094 | printk(KERN_NOTICE DRV_NAME |
| 1095 | ": rx: low on mem - packet dropped\n"); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1096 | dev->stats.rx_dropped++; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1097 | goto out; |
| 1098 | } |
| 1099 | /* reserve 2 bytes for RXDWA padding */ |
Michael Hennerich | 015dac8 | 2009-05-29 03:41:15 +0000 | [diff] [blame] | 1100 | skb_reserve(new_skb, NET_IP_ALIGN); |
Alexey Demin | 6e01d1a | 2008-01-30 16:52:27 +0800 | [diff] [blame] | 1101 | /* Invidate the data cache of skb->data range when it is write back |
| 1102 | * cache. It will prevent overwritting the new data from DMA |
| 1103 | */ |
| 1104 | blackfin_dcache_invalidate_range((unsigned long)new_skb->head, |
| 1105 | (unsigned long)new_skb->end); |
| 1106 | |
Sonic Zhang | f6e1e4f | 2010-05-10 05:39:08 +0000 | [diff] [blame] | 1107 | current_rx_ptr->skb = new_skb; |
| 1108 | current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2; |
| 1109 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1110 | len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN); |
Sonic Zhang | ad2864d | 2010-05-10 05:39:09 +0000 | [diff] [blame] | 1111 | /* Deduce Ethernet FCS length from Ethernet payload length */ |
| 1112 | len -= ETH_FCS_LEN; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1113 | skb_put(skb, len); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1114 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1115 | skb->protocol = eth_type_trans(skb, dev); |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1116 | |
| 1117 | bfin_rx_hwtstamp(dev, skb); |
| 1118 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1119 | #if defined(BFIN_MAC_CSUM_OFFLOAD) |
Sonic Zhang | ad2864d | 2010-05-10 05:39:09 +0000 | [diff] [blame] | 1120 | /* Checksum offloading only works for IPv4 packets with the standard IP header |
| 1121 | * length of 20 bytes, because the blackfin MAC checksum calculation is |
| 1122 | * based on that assumption. We must NOT use the calculated checksum if our |
| 1123 | * IP version or header break that assumption. |
| 1124 | */ |
| 1125 | if (skb->data[IP_HEADER_OFF] == 0x45) { |
| 1126 | skb->csum = current_rx_ptr->status.ip_payload_csum; |
| 1127 | /* |
| 1128 | * Deduce Ethernet FCS from hardware generated IP payload checksum. |
| 1129 | * IP checksum is based on 16-bit one's complement algorithm. |
| 1130 | * To deduce a value from checksum is equal to add its inversion. |
| 1131 | * If the IP payload len is odd, the inversed FCS should also |
| 1132 | * begin from odd address and leave first byte zero. |
| 1133 | */ |
| 1134 | if (skb->len % 2) { |
| 1135 | fcs[0] = 0; |
| 1136 | for (i = 0; i < ETH_FCS_LEN; i++) |
| 1137 | fcs[i + 1] = ~skb->data[skb->len + i]; |
| 1138 | skb->csum = csum_partial(fcs, ETH_FCS_LEN + 1, skb->csum); |
| 1139 | } else { |
| 1140 | for (i = 0; i < ETH_FCS_LEN; i++) |
| 1141 | fcs[i] = ~skb->data[skb->len + i]; |
| 1142 | skb->csum = csum_partial(fcs, ETH_FCS_LEN, skb->csum); |
| 1143 | } |
| 1144 | skb->ip_summed = CHECKSUM_COMPLETE; |
| 1145 | } |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1146 | #endif |
| 1147 | |
| 1148 | netif_rx(skb); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 1149 | dev->stats.rx_packets++; |
| 1150 | dev->stats.rx_bytes += len; |
Peter Meerwald | ec497b3 | 2010-05-17 17:20:50 -0700 | [diff] [blame] | 1151 | out: |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1152 | current_rx_ptr->status.status_word = 0x00000000; |
| 1153 | current_rx_ptr = current_rx_ptr->next; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1154 | } |
| 1155 | |
| 1156 | /* interrupt routine to handle rx and error signal */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1157 | static irqreturn_t bfin_mac_interrupt(int irq, void *dev_id) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1158 | { |
| 1159 | struct net_device *dev = dev_id; |
| 1160 | int number = 0; |
| 1161 | |
| 1162 | get_one_packet: |
| 1163 | if (current_rx_ptr->status.status_word == 0) { |
| 1164 | /* no more new packet received */ |
| 1165 | if (number == 0) { |
| 1166 | if (current_rx_ptr->next->status.status_word != 0) { |
| 1167 | current_rx_ptr = current_rx_ptr->next; |
| 1168 | goto real_rx; |
| 1169 | } |
| 1170 | } |
| 1171 | bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() | |
| 1172 | DMA_DONE | DMA_ERR); |
| 1173 | return IRQ_HANDLED; |
| 1174 | } |
| 1175 | |
| 1176 | real_rx: |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1177 | bfin_mac_rx(dev); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1178 | number++; |
| 1179 | goto get_one_packet; |
| 1180 | } |
| 1181 | |
| 1182 | #ifdef CONFIG_NET_POLL_CONTROLLER |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1183 | static void bfin_mac_poll(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1184 | { |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1185 | struct bfin_mac_local *lp = netdev_priv(dev); |
| 1186 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1187 | disable_irq(IRQ_MAC_RX); |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1188 | bfin_mac_interrupt(IRQ_MAC_RX, dev); |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1189 | tx_reclaim_skb(lp); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1190 | enable_irq(IRQ_MAC_RX); |
| 1191 | } |
| 1192 | #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| 1193 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1194 | static void bfin_mac_disable(void) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1195 | { |
| 1196 | unsigned int opmode; |
| 1197 | |
| 1198 | opmode = bfin_read_EMAC_OPMODE(); |
| 1199 | opmode &= (~RE); |
| 1200 | opmode &= (~TE); |
| 1201 | /* Turn off the EMAC */ |
| 1202 | bfin_write_EMAC_OPMODE(opmode); |
| 1203 | } |
| 1204 | |
| 1205 | /* |
| 1206 | * Enable Interrupts, Receive, and Transmit |
| 1207 | */ |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1208 | static int bfin_mac_enable(void) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1209 | { |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1210 | int ret; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1211 | u32 opmode; |
| 1212 | |
Harvey Harrison | b39d66a | 2008-08-20 16:52:04 -0700 | [diff] [blame] | 1213 | pr_debug("%s: %s\n", DRV_NAME, __func__); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1214 | |
| 1215 | /* Set RX DMA */ |
| 1216 | bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a)); |
| 1217 | bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config); |
| 1218 | |
| 1219 | /* Wait MII done */ |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1220 | ret = bfin_mdio_poll(); |
| 1221 | if (ret) |
| 1222 | return ret; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1223 | |
| 1224 | /* We enable only RX here */ |
| 1225 | /* ASTP : Enable Automatic Pad Stripping |
| 1226 | PR : Promiscuous Mode for test |
| 1227 | PSF : Receive frames with total length less than 64 bytes. |
| 1228 | FDMODE : Full Duplex Mode |
| 1229 | LB : Internal Loopback for test |
| 1230 | RE : Receiver Enable */ |
| 1231 | opmode = bfin_read_EMAC_OPMODE(); |
| 1232 | if (opmode & FDMODE) |
| 1233 | opmode |= PSF; |
| 1234 | else |
| 1235 | opmode |= DRO | DC | PSF; |
| 1236 | opmode |= RE; |
| 1237 | |
| 1238 | #if defined(CONFIG_BFIN_MAC_RMII) |
| 1239 | opmode |= RMII; /* For Now only 100MBit are supported */ |
Michael Hennerich | 6893ff1 | 2008-01-30 16:52:25 +0800 | [diff] [blame] | 1240 | #if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2 |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1241 | opmode |= TE; |
| 1242 | #endif |
| 1243 | #endif |
| 1244 | /* Turn on the EMAC rx */ |
| 1245 | bfin_write_EMAC_OPMODE(opmode); |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1246 | |
| 1247 | return 0; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1248 | } |
| 1249 | |
| 1250 | /* Our watchdog timed out. Called by the networking layer */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1251 | static void bfin_mac_timeout(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1252 | { |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1253 | struct bfin_mac_local *lp = netdev_priv(dev); |
| 1254 | |
Harvey Harrison | b39d66a | 2008-08-20 16:52:04 -0700 | [diff] [blame] | 1255 | pr_debug("%s: %s\n", dev->name, __func__); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1256 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1257 | bfin_mac_disable(); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1258 | |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1259 | del_timer(&lp->tx_reclaim_timer); |
| 1260 | |
| 1261 | /* reset tx queue and free skb */ |
| 1262 | while (tx_list_head != current_tx_ptr) { |
| 1263 | tx_list_head->desc_a.config &= ~DMAEN; |
| 1264 | tx_list_head->status.status_word = 0; |
| 1265 | if (tx_list_head->skb) { |
| 1266 | dev_kfree_skb(tx_list_head->skb); |
| 1267 | tx_list_head->skb = NULL; |
| 1268 | } |
| 1269 | tx_list_head = tx_list_head->next; |
| 1270 | } |
| 1271 | |
| 1272 | if (netif_queue_stopped(lp->ndev)) |
| 1273 | netif_wake_queue(lp->ndev); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1274 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1275 | bfin_mac_enable(); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1276 | |
| 1277 | /* We can accept TX packets again */ |
Eric Dumazet | 1ae5dc3 | 2010-05-10 05:01:31 -0700 | [diff] [blame] | 1278 | dev->trans_start = jiffies; /* prevent tx timeout */ |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1279 | netif_wake_queue(dev); |
| 1280 | } |
| 1281 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1282 | static void bfin_mac_multicast_hash(struct net_device *dev) |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1283 | { |
| 1284 | u32 emac_hashhi, emac_hashlo; |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1285 | struct netdev_hw_addr *ha; |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1286 | char *addrs; |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1287 | u32 crc; |
| 1288 | |
| 1289 | emac_hashhi = emac_hashlo = 0; |
| 1290 | |
Jiri Pirko | 22bedad | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1291 | netdev_for_each_mc_addr(ha, dev) { |
| 1292 | addrs = ha->addr; |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1293 | |
| 1294 | /* skip non-multicast addresses */ |
| 1295 | if (!(*addrs & 1)) |
| 1296 | continue; |
| 1297 | |
| 1298 | crc = ether_crc(ETH_ALEN, addrs); |
| 1299 | crc >>= 26; |
| 1300 | |
| 1301 | if (crc & 0x20) |
| 1302 | emac_hashhi |= 1 << (crc & 0x1f); |
| 1303 | else |
| 1304 | emac_hashlo |= 1 << (crc & 0x1f); |
| 1305 | } |
| 1306 | |
| 1307 | bfin_write_EMAC_HASHHI(emac_hashhi); |
| 1308 | bfin_write_EMAC_HASHLO(emac_hashlo); |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1309 | } |
| 1310 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1311 | /* |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1312 | * This routine will, depending on the values passed to it, |
| 1313 | * either make it accept multicast packets, go into |
| 1314 | * promiscuous mode (for TCPDUMP and cousins) or accept |
| 1315 | * a select set of multicast packets |
| 1316 | */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1317 | static void bfin_mac_set_multicast_list(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1318 | { |
| 1319 | u32 sysctl; |
| 1320 | |
| 1321 | if (dev->flags & IFF_PROMISC) { |
| 1322 | printk(KERN_INFO "%s: set to promisc mode\n", dev->name); |
| 1323 | sysctl = bfin_read_EMAC_OPMODE(); |
Sonic Zhang | c0da776 | 2010-05-10 05:39:12 +0000 | [diff] [blame] | 1324 | sysctl |= PR; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1325 | bfin_write_EMAC_OPMODE(sysctl); |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1326 | } else if (dev->flags & IFF_ALLMULTI) { |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1327 | /* accept all multicast */ |
| 1328 | sysctl = bfin_read_EMAC_OPMODE(); |
| 1329 | sysctl |= PAM; |
| 1330 | bfin_write_EMAC_OPMODE(sysctl); |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 1331 | } else if (!netdev_mc_empty(dev)) { |
Aidan Williams | 775919b | 2008-01-30 16:52:23 +0800 | [diff] [blame] | 1332 | /* set up multicast hash table */ |
| 1333 | sysctl = bfin_read_EMAC_OPMODE(); |
| 1334 | sysctl |= HM; |
| 1335 | bfin_write_EMAC_OPMODE(sysctl); |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1336 | bfin_mac_multicast_hash(dev); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1337 | } else { |
| 1338 | /* clear promisc or multicast mode */ |
| 1339 | sysctl = bfin_read_EMAC_OPMODE(); |
| 1340 | sysctl &= ~(RAF | PAM); |
| 1341 | bfin_write_EMAC_OPMODE(sysctl); |
| 1342 | } |
| 1343 | } |
| 1344 | |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1345 | static int bfin_mac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
| 1346 | { |
| 1347 | switch (cmd) { |
| 1348 | case SIOCSHWTSTAMP: |
| 1349 | return bfin_mac_hwtstamp_ioctl(netdev, ifr, cmd); |
| 1350 | default: |
| 1351 | return -EOPNOTSUPP; |
| 1352 | } |
| 1353 | } |
| 1354 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1355 | /* |
| 1356 | * this puts the device in an inactive state |
| 1357 | */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1358 | static void bfin_mac_shutdown(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1359 | { |
| 1360 | /* Turn off the EMAC */ |
| 1361 | bfin_write_EMAC_OPMODE(0x00000000); |
| 1362 | /* Turn off the EMAC RX DMA */ |
| 1363 | bfin_write_DMA1_CONFIG(0x0000); |
| 1364 | bfin_write_DMA2_CONFIG(0x0000); |
| 1365 | } |
| 1366 | |
| 1367 | /* |
| 1368 | * Open and Initialize the interface |
| 1369 | * |
| 1370 | * Set up everything, reset the card, etc.. |
| 1371 | */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1372 | static int bfin_mac_open(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1373 | { |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1374 | struct bfin_mac_local *lp = netdev_priv(dev); |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1375 | int ret; |
Harvey Harrison | b39d66a | 2008-08-20 16:52:04 -0700 | [diff] [blame] | 1376 | pr_debug("%s: %s\n", dev->name, __func__); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1377 | |
| 1378 | /* |
| 1379 | * Check that the address is valid. If its not, refuse |
| 1380 | * to bring the device up. The user must specify an |
| 1381 | * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx |
| 1382 | */ |
| 1383 | if (!is_valid_ether_addr(dev->dev_addr)) { |
| 1384 | printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n"); |
| 1385 | return -EINVAL; |
| 1386 | } |
| 1387 | |
| 1388 | /* initial rx and tx list */ |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1389 | ret = desc_list_init(); |
| 1390 | if (ret) |
| 1391 | return ret; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1392 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 1393 | phy_start(lp->phydev); |
Vitja Makarov | 136492b | 2008-01-30 16:52:26 +0800 | [diff] [blame] | 1394 | phy_write(lp->phydev, MII_BMCR, BMCR_RESET); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1395 | setup_system_regs(dev); |
Michael Hennerich | ee02fee | 2008-07-27 22:45:05 +0800 | [diff] [blame] | 1396 | setup_mac_addr(dev->dev_addr); |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1397 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1398 | bfin_mac_disable(); |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1399 | ret = bfin_mac_enable(); |
| 1400 | if (ret) |
| 1401 | return ret; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1402 | pr_debug("hardware init finished\n"); |
Mike Frysinger | 2bfa0f0 | 2010-05-10 05:39:13 +0000 | [diff] [blame] | 1403 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1404 | netif_start_queue(dev); |
| 1405 | netif_carrier_on(dev); |
| 1406 | |
| 1407 | return 0; |
| 1408 | } |
| 1409 | |
| 1410 | /* |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1411 | * this makes the board clean up everything that it can |
| 1412 | * and not talk to the outside world. Caused by |
| 1413 | * an 'ifconfig ethX down' |
| 1414 | */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1415 | static int bfin_mac_close(struct net_device *dev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1416 | { |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1417 | struct bfin_mac_local *lp = netdev_priv(dev); |
Harvey Harrison | b39d66a | 2008-08-20 16:52:04 -0700 | [diff] [blame] | 1418 | pr_debug("%s: %s\n", dev->name, __func__); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1419 | |
| 1420 | netif_stop_queue(dev); |
| 1421 | netif_carrier_off(dev); |
| 1422 | |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 1423 | phy_stop(lp->phydev); |
Vitja Makarov | 136492b | 2008-01-30 16:52:26 +0800 | [diff] [blame] | 1424 | phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN); |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 1425 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1426 | /* clear everything */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1427 | bfin_mac_shutdown(dev); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1428 | |
| 1429 | /* free the rx/tx buffers */ |
| 1430 | desc_list_free(); |
| 1431 | |
| 1432 | return 0; |
| 1433 | } |
| 1434 | |
Mike Frysinger | b63dc8f | 2009-05-26 20:55:33 -0700 | [diff] [blame] | 1435 | static const struct net_device_ops bfin_mac_netdev_ops = { |
| 1436 | .ndo_open = bfin_mac_open, |
| 1437 | .ndo_stop = bfin_mac_close, |
| 1438 | .ndo_start_xmit = bfin_mac_hard_start_xmit, |
| 1439 | .ndo_set_mac_address = bfin_mac_set_mac_address, |
| 1440 | .ndo_tx_timeout = bfin_mac_timeout, |
| 1441 | .ndo_set_multicast_list = bfin_mac_set_multicast_list, |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1442 | .ndo_do_ioctl = bfin_mac_ioctl, |
Mike Frysinger | b63dc8f | 2009-05-26 20:55:33 -0700 | [diff] [blame] | 1443 | .ndo_validate_addr = eth_validate_addr, |
| 1444 | .ndo_change_mtu = eth_change_mtu, |
| 1445 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1446 | .ndo_poll_controller = bfin_mac_poll, |
| 1447 | #endif |
| 1448 | }; |
| 1449 | |
Mike Frysinger | d7b843d | 2008-07-27 22:45:03 +0800 | [diff] [blame] | 1450 | static int __devinit bfin_mac_probe(struct platform_device *pdev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1451 | { |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1452 | struct net_device *ndev; |
| 1453 | struct bfin_mac_local *lp; |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1454 | struct platform_device *pd; |
| 1455 | int rc; |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1456 | |
| 1457 | ndev = alloc_etherdev(sizeof(struct bfin_mac_local)); |
| 1458 | if (!ndev) { |
| 1459 | dev_err(&pdev->dev, "Cannot allocate net device!\n"); |
| 1460 | return -ENOMEM; |
| 1461 | } |
| 1462 | |
| 1463 | SET_NETDEV_DEV(ndev, &pdev->dev); |
| 1464 | platform_set_drvdata(pdev, ndev); |
| 1465 | lp = netdev_priv(ndev); |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1466 | lp->ndev = ndev; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1467 | |
| 1468 | /* Grab the MAC address in the MAC */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1469 | *(__le32 *) (&(ndev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO()); |
| 1470 | *(__le16 *) (&(ndev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI()); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1471 | |
| 1472 | /* probe mac */ |
| 1473 | /*todo: how to proble? which is revision_register */ |
| 1474 | bfin_write_EMAC_ADDRLO(0x12345678); |
| 1475 | if (bfin_read_EMAC_ADDRLO() != 0x12345678) { |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1476 | dev_err(&pdev->dev, "Cannot detect Blackfin on-chip ethernet MAC controller!\n"); |
| 1477 | rc = -ENODEV; |
| 1478 | goto out_err_probe_mac; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1479 | } |
| 1480 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1481 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1482 | /* |
| 1483 | * Is it valid? (Did bootloader initialize it?) |
| 1484 | * Grab the MAC from the board somehow |
| 1485 | * this is done in the arch/blackfin/mach-bfxxx/boards/eth_mac.c |
| 1486 | */ |
| 1487 | if (!is_valid_ether_addr(ndev->dev_addr)) |
| 1488 | bfin_get_ether_addr(ndev->dev_addr); |
| 1489 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1490 | /* If still not valid, get a random one */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1491 | if (!is_valid_ether_addr(ndev->dev_addr)) |
| 1492 | random_ether_addr(ndev->dev_addr); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1493 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1494 | setup_mac_addr(ndev->dev_addr); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1495 | |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1496 | if (!pdev->dev.platform_data) { |
| 1497 | dev_err(&pdev->dev, "Cannot get platform device bfin_mii_bus!\n"); |
| 1498 | rc = -ENODEV; |
| 1499 | goto out_err_probe_mac; |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1500 | } |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1501 | pd = pdev->dev.platform_data; |
| 1502 | lp->mii_bus = platform_get_drvdata(pd); |
Sonic Zhang | 0e995cd | 2010-05-10 05:39:14 +0000 | [diff] [blame] | 1503 | if (!lp->mii_bus) { |
| 1504 | dev_err(&pdev->dev, "Cannot get mii_bus!\n"); |
| 1505 | rc = -ENODEV; |
| 1506 | goto out_err_mii_bus_probe; |
| 1507 | } |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1508 | lp->mii_bus->priv = ndev; |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 1509 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1510 | rc = mii_probe(ndev); |
| 1511 | if (rc) { |
| 1512 | dev_err(&pdev->dev, "MII Probe failed!\n"); |
| 1513 | goto out_err_mii_probe; |
| 1514 | } |
Bryan Wu | 4ae5a3a | 2007-09-19 23:37:36 +0800 | [diff] [blame] | 1515 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1516 | /* Fill in the fields of the device structure with ethernet values. */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1517 | ether_setup(ndev); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1518 | |
Alexander Beregalov | 149da65 | 2009-04-14 18:30:24 +0000 | [diff] [blame] | 1519 | ndev->netdev_ops = &bfin_mac_netdev_ops; |
Bryan Wu | 679dce3 | 2008-04-25 11:53:11 +0800 | [diff] [blame] | 1520 | ndev->ethtool_ops = &bfin_mac_ethtool_ops; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1521 | |
Sonic Zhang | 4fcc3d3 | 2010-06-11 17:44:31 +0800 | [diff] [blame] | 1522 | init_timer(&lp->tx_reclaim_timer); |
| 1523 | lp->tx_reclaim_timer.data = (unsigned long)lp; |
| 1524 | lp->tx_reclaim_timer.function = tx_reclaim_skb_timeout; |
| 1525 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1526 | spin_lock_init(&lp->lock); |
| 1527 | |
| 1528 | /* now, enable interrupts */ |
| 1529 | /* register irq handler */ |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1530 | rc = request_irq(IRQ_MAC_RX, bfin_mac_interrupt, |
Michael Hennerich | 91a455f | 2009-05-29 03:39:45 +0000 | [diff] [blame] | 1531 | IRQF_DISABLED, "EMAC_RX", ndev); |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1532 | if (rc) { |
| 1533 | dev_err(&pdev->dev, "Cannot request Blackfin MAC RX IRQ!\n"); |
| 1534 | rc = -EBUSY; |
| 1535 | goto out_err_request_irq; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1536 | } |
| 1537 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1538 | rc = register_netdev(ndev); |
| 1539 | if (rc) { |
| 1540 | dev_err(&pdev->dev, "Cannot register net device!\n"); |
| 1541 | goto out_err_reg_ndev; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1542 | } |
| 1543 | |
Barry Song | fe92afe | 2010-05-17 17:19:40 -0700 | [diff] [blame] | 1544 | bfin_mac_hwtstamp_init(ndev); |
| 1545 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1546 | /* now, print out the card info, in a short format.. */ |
| 1547 | dev_info(&pdev->dev, "%s, Version %s\n", DRV_DESC, DRV_VERSION); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1548 | |
| 1549 | return 0; |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1550 | |
| 1551 | out_err_reg_ndev: |
| 1552 | free_irq(IRQ_MAC_RX, ndev); |
| 1553 | out_err_request_irq: |
| 1554 | out_err_mii_probe: |
Lennert Buytenhek | 298cf9b | 2008-10-08 16:29:57 -0700 | [diff] [blame] | 1555 | mdiobus_unregister(lp->mii_bus); |
Lennert Buytenhek | 298cf9b | 2008-10-08 16:29:57 -0700 | [diff] [blame] | 1556 | mdiobus_free(lp->mii_bus); |
Sonic Zhang | 0e995cd | 2010-05-10 05:39:14 +0000 | [diff] [blame] | 1557 | out_err_mii_bus_probe: |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1558 | peripheral_free_list(pin_req); |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1559 | out_err_probe_mac: |
| 1560 | platform_set_drvdata(pdev, NULL); |
| 1561 | free_netdev(ndev); |
| 1562 | |
| 1563 | return rc; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1564 | } |
| 1565 | |
Mike Frysinger | d7b843d | 2008-07-27 22:45:03 +0800 | [diff] [blame] | 1566 | static int __devexit bfin_mac_remove(struct platform_device *pdev) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1567 | { |
| 1568 | struct net_device *ndev = platform_get_drvdata(pdev); |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1569 | struct bfin_mac_local *lp = netdev_priv(ndev); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1570 | |
| 1571 | platform_set_drvdata(pdev, NULL); |
| 1572 | |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1573 | lp->mii_bus->priv = NULL; |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1574 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1575 | unregister_netdev(ndev); |
| 1576 | |
| 1577 | free_irq(IRQ_MAC_RX, ndev); |
| 1578 | |
| 1579 | free_netdev(ndev); |
| 1580 | |
Bryan Wu | 7ef0a7e | 2008-04-25 11:53:10 +0800 | [diff] [blame] | 1581 | peripheral_free_list(pin_req); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1582 | |
| 1583 | return 0; |
| 1584 | } |
| 1585 | |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1586 | #ifdef CONFIG_PM |
| 1587 | static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg) |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1588 | { |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1589 | struct net_device *net_dev = platform_get_drvdata(pdev); |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 1590 | struct bfin_mac_local *lp = netdev_priv(net_dev); |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1591 | |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 1592 | if (lp->wol) { |
| 1593 | bfin_write_EMAC_OPMODE((bfin_read_EMAC_OPMODE() & ~TE) | RE); |
| 1594 | bfin_write_EMAC_WKUP_CTL(MPKE); |
| 1595 | enable_irq_wake(IRQ_MAC_WAKEDET); |
| 1596 | } else { |
| 1597 | if (netif_running(net_dev)) |
| 1598 | bfin_mac_close(net_dev); |
| 1599 | } |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1600 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1601 | return 0; |
| 1602 | } |
| 1603 | |
| 1604 | static int bfin_mac_resume(struct platform_device *pdev) |
| 1605 | { |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1606 | struct net_device *net_dev = platform_get_drvdata(pdev); |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 1607 | struct bfin_mac_local *lp = netdev_priv(net_dev); |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1608 | |
Michael Hennerich | 53fd3f2 | 2010-05-10 05:39:11 +0000 | [diff] [blame] | 1609 | if (lp->wol) { |
| 1610 | bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); |
| 1611 | bfin_write_EMAC_WKUP_CTL(0); |
| 1612 | disable_irq_wake(IRQ_MAC_WAKEDET); |
| 1613 | } else { |
| 1614 | if (netif_running(net_dev)) |
| 1615 | bfin_mac_open(net_dev); |
| 1616 | } |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1617 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1618 | return 0; |
| 1619 | } |
Bryan Wu | 496a34c | 2007-09-19 23:37:14 +0800 | [diff] [blame] | 1620 | #else |
| 1621 | #define bfin_mac_suspend NULL |
| 1622 | #define bfin_mac_resume NULL |
| 1623 | #endif /* CONFIG_PM */ |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1624 | |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1625 | static int __devinit bfin_mii_bus_probe(struct platform_device *pdev) |
| 1626 | { |
| 1627 | struct mii_bus *miibus; |
| 1628 | int rc, i; |
| 1629 | |
| 1630 | /* |
| 1631 | * We are setting up a network card, |
| 1632 | * so set the GPIO pins to Ethernet mode |
| 1633 | */ |
| 1634 | rc = peripheral_request_list(pin_req, DRV_NAME); |
| 1635 | if (rc) { |
| 1636 | dev_err(&pdev->dev, "Requesting peripherals failed!\n"); |
| 1637 | return rc; |
| 1638 | } |
| 1639 | |
| 1640 | rc = -ENOMEM; |
| 1641 | miibus = mdiobus_alloc(); |
| 1642 | if (miibus == NULL) |
| 1643 | goto out_err_alloc; |
| 1644 | miibus->read = bfin_mdiobus_read; |
| 1645 | miibus->write = bfin_mdiobus_write; |
| 1646 | miibus->reset = bfin_mdiobus_reset; |
| 1647 | |
| 1648 | miibus->parent = &pdev->dev; |
| 1649 | miibus->name = "bfin_mii_bus"; |
| 1650 | snprintf(miibus->id, MII_BUS_ID_SIZE, "0"); |
| 1651 | miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); |
| 1652 | if (miibus->irq == NULL) |
| 1653 | goto out_err_alloc; |
| 1654 | for (i = 0; i < PHY_MAX_ADDR; ++i) |
| 1655 | miibus->irq[i] = PHY_POLL; |
| 1656 | |
| 1657 | rc = mdiobus_register(miibus); |
| 1658 | if (rc) { |
| 1659 | dev_err(&pdev->dev, "Cannot register MDIO bus!\n"); |
| 1660 | goto out_err_mdiobus_register; |
| 1661 | } |
| 1662 | |
| 1663 | platform_set_drvdata(pdev, miibus); |
| 1664 | return 0; |
| 1665 | |
| 1666 | out_err_mdiobus_register: |
Denis Kirjanov | 7f267de | 2010-05-18 01:34:46 +0000 | [diff] [blame] | 1667 | kfree(miibus->irq); |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1668 | mdiobus_free(miibus); |
| 1669 | out_err_alloc: |
| 1670 | peripheral_free_list(pin_req); |
| 1671 | |
| 1672 | return rc; |
| 1673 | } |
| 1674 | |
| 1675 | static int __devexit bfin_mii_bus_remove(struct platform_device *pdev) |
| 1676 | { |
| 1677 | struct mii_bus *miibus = platform_get_drvdata(pdev); |
| 1678 | platform_set_drvdata(pdev, NULL); |
| 1679 | mdiobus_unregister(miibus); |
Denis Kirjanov | 7f267de | 2010-05-18 01:34:46 +0000 | [diff] [blame] | 1680 | kfree(miibus->irq); |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1681 | mdiobus_free(miibus); |
| 1682 | peripheral_free_list(pin_req); |
| 1683 | return 0; |
| 1684 | } |
| 1685 | |
| 1686 | static struct platform_driver bfin_mii_bus_driver = { |
| 1687 | .probe = bfin_mii_bus_probe, |
| 1688 | .remove = __devexit_p(bfin_mii_bus_remove), |
| 1689 | .driver = { |
| 1690 | .name = "bfin_mii_bus", |
| 1691 | .owner = THIS_MODULE, |
| 1692 | }, |
| 1693 | }; |
| 1694 | |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1695 | static struct platform_driver bfin_mac_driver = { |
| 1696 | .probe = bfin_mac_probe, |
Mike Frysinger | d7b843d | 2008-07-27 22:45:03 +0800 | [diff] [blame] | 1697 | .remove = __devexit_p(bfin_mac_remove), |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1698 | .resume = bfin_mac_resume, |
| 1699 | .suspend = bfin_mac_suspend, |
| 1700 | .driver = { |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 1701 | .name = DRV_NAME, |
| 1702 | .owner = THIS_MODULE, |
| 1703 | }, |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1704 | }; |
| 1705 | |
| 1706 | static int __init bfin_mac_init(void) |
| 1707 | { |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1708 | int ret; |
| 1709 | ret = platform_driver_register(&bfin_mii_bus_driver); |
| 1710 | if (!ret) |
| 1711 | return platform_driver_register(&bfin_mac_driver); |
| 1712 | return -ENODEV; |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1713 | } |
| 1714 | |
| 1715 | module_init(bfin_mac_init); |
| 1716 | |
| 1717 | static void __exit bfin_mac_cleanup(void) |
| 1718 | { |
| 1719 | platform_driver_unregister(&bfin_mac_driver); |
Graf Yang | 080c825 | 2009-05-29 03:41:48 +0000 | [diff] [blame] | 1720 | platform_driver_unregister(&bfin_mii_bus_driver); |
Bryan Wu | e190d6b | 2007-07-17 14:43:44 +0800 | [diff] [blame] | 1721 | } |
| 1722 | |
| 1723 | module_exit(bfin_mac_cleanup); |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 1724 | |