John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Xilinx EmacLite Linux driver for the Xilinx Ethernet MAC Lite device. |
| 3 | * |
| 4 | * This is a new flat driver which is based on the original emac_lite |
| 5 | * driver from John Williams <john.williams@petalogix.com>. |
| 6 | * |
| 7 | * 2007-2009 (c) Xilinx, Inc. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License as published by the |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your |
| 12 | * option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/uaccess.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/skbuff.h> |
| 21 | #include <linux/io.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 22 | #include <linux/slab.h> |
Grant Likely | 22ae782 | 2010-07-29 11:49:01 -0600 | [diff] [blame] | 23 | #include <linux/of_address.h> |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 24 | #include <linux/of_device.h> |
| 25 | #include <linux/of_platform.h> |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 26 | #include <linux/of_mdio.h> |
David Daney | 4b6ba8a | 2010-10-26 15:07:13 -0700 | [diff] [blame] | 27 | #include <linux/of_net.h> |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 28 | #include <linux/phy.h> |
Michal Simek | 075cd29 | 2011-06-09 01:29:13 -0700 | [diff] [blame] | 29 | #include <linux/interrupt.h> |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 30 | |
| 31 | #define DRIVER_NAME "xilinx_emaclite" |
| 32 | |
| 33 | /* Register offsets for the EmacLite Core */ |
| 34 | #define XEL_TXBUFF_OFFSET 0x0 /* Transmit Buffer */ |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 35 | #define XEL_MDIOADDR_OFFSET 0x07E4 /* MDIO Address Register */ |
| 36 | #define XEL_MDIOWR_OFFSET 0x07E8 /* MDIO Write Data Register */ |
| 37 | #define XEL_MDIORD_OFFSET 0x07EC /* MDIO Read Data Register */ |
| 38 | #define XEL_MDIOCTRL_OFFSET 0x07F0 /* MDIO Control Register */ |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 39 | #define XEL_GIER_OFFSET 0x07F8 /* GIE Register */ |
| 40 | #define XEL_TSR_OFFSET 0x07FC /* Tx status */ |
| 41 | #define XEL_TPLR_OFFSET 0x07F4 /* Tx packet length */ |
| 42 | |
| 43 | #define XEL_RXBUFF_OFFSET 0x1000 /* Receive Buffer */ |
| 44 | #define XEL_RPLR_OFFSET 0x100C /* Rx packet length */ |
| 45 | #define XEL_RSR_OFFSET 0x17FC /* Rx status */ |
| 46 | |
| 47 | #define XEL_BUFFER_OFFSET 0x0800 /* Next Tx/Rx buffer's offset */ |
| 48 | |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 49 | /* MDIO Address Register Bit Masks */ |
| 50 | #define XEL_MDIOADDR_REGADR_MASK 0x0000001F /* Register Address */ |
| 51 | #define XEL_MDIOADDR_PHYADR_MASK 0x000003E0 /* PHY Address */ |
| 52 | #define XEL_MDIOADDR_PHYADR_SHIFT 5 |
| 53 | #define XEL_MDIOADDR_OP_MASK 0x00000400 /* RD/WR Operation */ |
| 54 | |
| 55 | /* MDIO Write Data Register Bit Masks */ |
| 56 | #define XEL_MDIOWR_WRDATA_MASK 0x0000FFFF /* Data to be Written */ |
| 57 | |
| 58 | /* MDIO Read Data Register Bit Masks */ |
| 59 | #define XEL_MDIORD_RDDATA_MASK 0x0000FFFF /* Data to be Read */ |
| 60 | |
| 61 | /* MDIO Control Register Bit Masks */ |
| 62 | #define XEL_MDIOCTRL_MDIOSTS_MASK 0x00000001 /* MDIO Status Mask */ |
| 63 | #define XEL_MDIOCTRL_MDIOEN_MASK 0x00000008 /* MDIO Enable */ |
| 64 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 65 | /* Global Interrupt Enable Register (GIER) Bit Masks */ |
| 66 | #define XEL_GIER_GIE_MASK 0x80000000 /* Global Enable */ |
| 67 | |
| 68 | /* Transmit Status Register (TSR) Bit Masks */ |
| 69 | #define XEL_TSR_XMIT_BUSY_MASK 0x00000001 /* Tx complete */ |
| 70 | #define XEL_TSR_PROGRAM_MASK 0x00000002 /* Program the MAC address */ |
| 71 | #define XEL_TSR_XMIT_IE_MASK 0x00000008 /* Tx interrupt enable bit */ |
| 72 | #define XEL_TSR_XMIT_ACTIVE_MASK 0x80000000 /* Buffer is active, SW bit |
| 73 | * only. This is not documented |
| 74 | * in the HW spec */ |
| 75 | |
| 76 | /* Define for programming the MAC address into the EmacLite */ |
| 77 | #define XEL_TSR_PROG_MAC_ADDR (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_PROGRAM_MASK) |
| 78 | |
| 79 | /* Receive Status Register (RSR) */ |
| 80 | #define XEL_RSR_RECV_DONE_MASK 0x00000001 /* Rx complete */ |
| 81 | #define XEL_RSR_RECV_IE_MASK 0x00000008 /* Rx interrupt enable bit */ |
| 82 | |
| 83 | /* Transmit Packet Length Register (TPLR) */ |
| 84 | #define XEL_TPLR_LENGTH_MASK 0x0000FFFF /* Tx packet length */ |
| 85 | |
| 86 | /* Receive Packet Length Register (RPLR) */ |
| 87 | #define XEL_RPLR_LENGTH_MASK 0x0000FFFF /* Rx packet length */ |
| 88 | |
| 89 | #define XEL_HEADER_OFFSET 12 /* Offset to length field */ |
| 90 | #define XEL_HEADER_SHIFT 16 /* Shift value for length */ |
| 91 | |
| 92 | /* General Ethernet Definitions */ |
| 93 | #define XEL_ARP_PACKET_SIZE 28 /* Max ARP packet size */ |
| 94 | #define XEL_HEADER_IP_LENGTH_OFFSET 16 /* IP Length Offset */ |
| 95 | |
| 96 | |
| 97 | |
| 98 | #define TX_TIMEOUT (60*HZ) /* Tx timeout is 60 seconds. */ |
| 99 | #define ALIGNMENT 4 |
| 100 | |
| 101 | /* BUFFER_ALIGN(adr) calculates the number of bytes to the next alignment. */ |
| 102 | #define BUFFER_ALIGN(adr) ((ALIGNMENT - ((u32) adr)) % ALIGNMENT) |
| 103 | |
| 104 | /** |
| 105 | * struct net_local - Our private per device data |
| 106 | * @ndev: instance of the network device |
| 107 | * @tx_ping_pong: indicates whether Tx Pong buffer is configured in HW |
| 108 | * @rx_ping_pong: indicates whether Rx Pong buffer is configured in HW |
| 109 | * @next_tx_buf_to_use: next Tx buffer to write to |
| 110 | * @next_rx_buf_to_use: next Rx buffer to read from |
| 111 | * @base_addr: base address of the Emaclite device |
| 112 | * @reset_lock: lock used for synchronization |
| 113 | * @deferred_skb: holds an skb (for transmission at a later time) when the |
| 114 | * Tx buffer is not free |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 115 | * @phy_dev: pointer to the PHY device |
| 116 | * @phy_node: pointer to the PHY device node |
| 117 | * @mii_bus: pointer to the MII bus |
| 118 | * @mdio_irqs: IRQs table for MDIO bus |
| 119 | * @last_link: last link status |
| 120 | * @has_mdio: indicates whether MDIO is included in the HW |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 121 | */ |
| 122 | struct net_local { |
| 123 | |
| 124 | struct net_device *ndev; |
| 125 | |
| 126 | bool tx_ping_pong; |
| 127 | bool rx_ping_pong; |
| 128 | u32 next_tx_buf_to_use; |
| 129 | u32 next_rx_buf_to_use; |
| 130 | void __iomem *base_addr; |
| 131 | |
| 132 | spinlock_t reset_lock; |
| 133 | struct sk_buff *deferred_skb; |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 134 | |
| 135 | struct phy_device *phy_dev; |
| 136 | struct device_node *phy_node; |
| 137 | |
| 138 | struct mii_bus *mii_bus; |
| 139 | int mdio_irqs[PHY_MAX_ADDR]; |
| 140 | |
| 141 | int last_link; |
| 142 | bool has_mdio; |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 143 | }; |
| 144 | |
| 145 | |
| 146 | /*************************/ |
| 147 | /* EmacLite driver calls */ |
| 148 | /*************************/ |
| 149 | |
| 150 | /** |
| 151 | * xemaclite_enable_interrupts - Enable the interrupts for the EmacLite device |
| 152 | * @drvdata: Pointer to the Emaclite device private data |
| 153 | * |
| 154 | * This function enables the Tx and Rx interrupts for the Emaclite device along |
| 155 | * with the Global Interrupt Enable. |
| 156 | */ |
| 157 | static void xemaclite_enable_interrupts(struct net_local *drvdata) |
| 158 | { |
| 159 | u32 reg_data; |
| 160 | |
| 161 | /* Enable the Tx interrupts for the first Buffer */ |
| 162 | reg_data = in_be32(drvdata->base_addr + XEL_TSR_OFFSET); |
| 163 | out_be32(drvdata->base_addr + XEL_TSR_OFFSET, |
| 164 | reg_data | XEL_TSR_XMIT_IE_MASK); |
| 165 | |
| 166 | /* Enable the Tx interrupts for the second Buffer if |
| 167 | * configured in HW */ |
| 168 | if (drvdata->tx_ping_pong != 0) { |
| 169 | reg_data = in_be32(drvdata->base_addr + |
| 170 | XEL_BUFFER_OFFSET + XEL_TSR_OFFSET); |
| 171 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + |
| 172 | XEL_TSR_OFFSET, |
| 173 | reg_data | XEL_TSR_XMIT_IE_MASK); |
| 174 | } |
| 175 | |
| 176 | /* Enable the Rx interrupts for the first buffer */ |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 177 | out_be32(drvdata->base_addr + XEL_RSR_OFFSET, |
Michal Simek | 95acf7d | 2009-09-22 05:24:14 +0000 | [diff] [blame] | 178 | XEL_RSR_RECV_IE_MASK); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 179 | |
| 180 | /* Enable the Rx interrupts for the second Buffer if |
| 181 | * configured in HW */ |
| 182 | if (drvdata->rx_ping_pong != 0) { |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 183 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + |
| 184 | XEL_RSR_OFFSET, |
Michal Simek | 95acf7d | 2009-09-22 05:24:14 +0000 | [diff] [blame] | 185 | XEL_RSR_RECV_IE_MASK); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /* Enable the Global Interrupt Enable */ |
| 189 | out_be32(drvdata->base_addr + XEL_GIER_OFFSET, XEL_GIER_GIE_MASK); |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * xemaclite_disable_interrupts - Disable the interrupts for the EmacLite device |
| 194 | * @drvdata: Pointer to the Emaclite device private data |
| 195 | * |
| 196 | * This function disables the Tx and Rx interrupts for the Emaclite device, |
| 197 | * along with the Global Interrupt Enable. |
| 198 | */ |
| 199 | static void xemaclite_disable_interrupts(struct net_local *drvdata) |
| 200 | { |
| 201 | u32 reg_data; |
| 202 | |
| 203 | /* Disable the Global Interrupt Enable */ |
| 204 | out_be32(drvdata->base_addr + XEL_GIER_OFFSET, XEL_GIER_GIE_MASK); |
| 205 | |
| 206 | /* Disable the Tx interrupts for the first buffer */ |
| 207 | reg_data = in_be32(drvdata->base_addr + XEL_TSR_OFFSET); |
| 208 | out_be32(drvdata->base_addr + XEL_TSR_OFFSET, |
| 209 | reg_data & (~XEL_TSR_XMIT_IE_MASK)); |
| 210 | |
| 211 | /* Disable the Tx interrupts for the second Buffer |
| 212 | * if configured in HW */ |
| 213 | if (drvdata->tx_ping_pong != 0) { |
| 214 | reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + |
| 215 | XEL_TSR_OFFSET); |
| 216 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + |
| 217 | XEL_TSR_OFFSET, |
| 218 | reg_data & (~XEL_TSR_XMIT_IE_MASK)); |
| 219 | } |
| 220 | |
| 221 | /* Disable the Rx interrupts for the first buffer */ |
| 222 | reg_data = in_be32(drvdata->base_addr + XEL_RSR_OFFSET); |
| 223 | out_be32(drvdata->base_addr + XEL_RSR_OFFSET, |
| 224 | reg_data & (~XEL_RSR_RECV_IE_MASK)); |
| 225 | |
| 226 | /* Disable the Rx interrupts for the second buffer |
| 227 | * if configured in HW */ |
| 228 | if (drvdata->rx_ping_pong != 0) { |
| 229 | |
| 230 | reg_data = in_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + |
| 231 | XEL_RSR_OFFSET); |
| 232 | out_be32(drvdata->base_addr + XEL_BUFFER_OFFSET + |
| 233 | XEL_RSR_OFFSET, |
| 234 | reg_data & (~XEL_RSR_RECV_IE_MASK)); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * xemaclite_aligned_write - Write from 16-bit aligned to 32-bit aligned address |
| 240 | * @src_ptr: Void pointer to the 16-bit aligned source address |
| 241 | * @dest_ptr: Pointer to the 32-bit aligned destination address |
| 242 | * @length: Number bytes to write from source to destination |
| 243 | * |
| 244 | * This function writes data from a 16-bit aligned buffer to a 32-bit aligned |
| 245 | * address in the EmacLite device. |
| 246 | */ |
| 247 | static void xemaclite_aligned_write(void *src_ptr, u32 *dest_ptr, |
| 248 | unsigned length) |
| 249 | { |
| 250 | u32 align_buffer; |
| 251 | u32 *to_u32_ptr; |
| 252 | u16 *from_u16_ptr, *to_u16_ptr; |
| 253 | |
| 254 | to_u32_ptr = dest_ptr; |
| 255 | from_u16_ptr = (u16 *) src_ptr; |
| 256 | align_buffer = 0; |
| 257 | |
| 258 | for (; length > 3; length -= 4) { |
| 259 | to_u16_ptr = (u16 *) ((void *) &align_buffer); |
| 260 | *to_u16_ptr++ = *from_u16_ptr++; |
| 261 | *to_u16_ptr++ = *from_u16_ptr++; |
| 262 | |
| 263 | /* Output a word */ |
| 264 | *to_u32_ptr++ = align_buffer; |
| 265 | } |
| 266 | if (length) { |
| 267 | u8 *from_u8_ptr, *to_u8_ptr; |
| 268 | |
| 269 | /* Set up to output the remaining data */ |
| 270 | align_buffer = 0; |
| 271 | to_u8_ptr = (u8 *) &align_buffer; |
| 272 | from_u8_ptr = (u8 *) from_u16_ptr; |
| 273 | |
| 274 | /* Output the remaining data */ |
| 275 | for (; length > 0; length--) |
| 276 | *to_u8_ptr++ = *from_u8_ptr++; |
| 277 | |
| 278 | *to_u32_ptr = align_buffer; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * xemaclite_aligned_read - Read from 32-bit aligned to 16-bit aligned buffer |
| 284 | * @src_ptr: Pointer to the 32-bit aligned source address |
| 285 | * @dest_ptr: Pointer to the 16-bit aligned destination address |
| 286 | * @length: Number bytes to read from source to destination |
| 287 | * |
| 288 | * This function reads data from a 32-bit aligned address in the EmacLite device |
| 289 | * to a 16-bit aligned buffer. |
| 290 | */ |
| 291 | static void xemaclite_aligned_read(u32 *src_ptr, u8 *dest_ptr, |
| 292 | unsigned length) |
| 293 | { |
| 294 | u16 *to_u16_ptr, *from_u16_ptr; |
| 295 | u32 *from_u32_ptr; |
| 296 | u32 align_buffer; |
| 297 | |
| 298 | from_u32_ptr = src_ptr; |
| 299 | to_u16_ptr = (u16 *) dest_ptr; |
| 300 | |
| 301 | for (; length > 3; length -= 4) { |
| 302 | /* Copy each word into the temporary buffer */ |
| 303 | align_buffer = *from_u32_ptr++; |
| 304 | from_u16_ptr = (u16 *)&align_buffer; |
| 305 | |
| 306 | /* Read data from source */ |
| 307 | *to_u16_ptr++ = *from_u16_ptr++; |
| 308 | *to_u16_ptr++ = *from_u16_ptr++; |
| 309 | } |
| 310 | |
| 311 | if (length) { |
| 312 | u8 *to_u8_ptr, *from_u8_ptr; |
| 313 | |
| 314 | /* Set up to read the remaining data */ |
| 315 | to_u8_ptr = (u8 *) to_u16_ptr; |
| 316 | align_buffer = *from_u32_ptr++; |
| 317 | from_u8_ptr = (u8 *) &align_buffer; |
| 318 | |
| 319 | /* Read the remaining data */ |
| 320 | for (; length > 0; length--) |
| 321 | *to_u8_ptr = *from_u8_ptr; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * xemaclite_send_data - Send an Ethernet frame |
| 327 | * @drvdata: Pointer to the Emaclite device private data |
| 328 | * @data: Pointer to the data to be sent |
| 329 | * @byte_count: Total frame size, including header |
| 330 | * |
| 331 | * This function checks if the Tx buffer of the Emaclite device is free to send |
| 332 | * data. If so, it fills the Tx buffer with data for transmission. Otherwise, it |
| 333 | * returns an error. |
| 334 | * |
| 335 | * Return: 0 upon success or -1 if the buffer(s) are full. |
| 336 | * |
| 337 | * Note: The maximum Tx packet size can not be more than Ethernet header |
| 338 | * (14 Bytes) + Maximum MTU (1500 bytes). This is excluding FCS. |
| 339 | */ |
| 340 | static int xemaclite_send_data(struct net_local *drvdata, u8 *data, |
| 341 | unsigned int byte_count) |
| 342 | { |
| 343 | u32 reg_data; |
| 344 | void __iomem *addr; |
| 345 | |
| 346 | /* Determine the expected Tx buffer address */ |
| 347 | addr = drvdata->base_addr + drvdata->next_tx_buf_to_use; |
| 348 | |
| 349 | /* If the length is too large, truncate it */ |
| 350 | if (byte_count > ETH_FRAME_LEN) |
| 351 | byte_count = ETH_FRAME_LEN; |
| 352 | |
| 353 | /* Check if the expected buffer is available */ |
| 354 | reg_data = in_be32(addr + XEL_TSR_OFFSET); |
| 355 | if ((reg_data & (XEL_TSR_XMIT_BUSY_MASK | |
| 356 | XEL_TSR_XMIT_ACTIVE_MASK)) == 0) { |
| 357 | |
| 358 | /* Switch to next buffer if configured */ |
| 359 | if (drvdata->tx_ping_pong != 0) |
| 360 | drvdata->next_tx_buf_to_use ^= XEL_BUFFER_OFFSET; |
| 361 | } else if (drvdata->tx_ping_pong != 0) { |
| 362 | /* If the expected buffer is full, try the other buffer, |
| 363 | * if it is configured in HW */ |
| 364 | |
| 365 | addr = (void __iomem __force *)((u32 __force)addr ^ |
| 366 | XEL_BUFFER_OFFSET); |
| 367 | reg_data = in_be32(addr + XEL_TSR_OFFSET); |
| 368 | |
| 369 | if ((reg_data & (XEL_TSR_XMIT_BUSY_MASK | |
| 370 | XEL_TSR_XMIT_ACTIVE_MASK)) != 0) |
| 371 | return -1; /* Buffers were full, return failure */ |
| 372 | } else |
| 373 | return -1; /* Buffer was full, return failure */ |
| 374 | |
| 375 | /* Write the frame to the buffer */ |
| 376 | xemaclite_aligned_write(data, (u32 __force *) addr, byte_count); |
| 377 | |
| 378 | out_be32(addr + XEL_TPLR_OFFSET, (byte_count & XEL_TPLR_LENGTH_MASK)); |
| 379 | |
| 380 | /* Update the Tx Status Register to indicate that there is a |
| 381 | * frame to send. Set the XEL_TSR_XMIT_ACTIVE_MASK flag which |
| 382 | * is used by the interrupt handler to check whether a frame |
| 383 | * has been transmitted */ |
| 384 | reg_data = in_be32(addr + XEL_TSR_OFFSET); |
| 385 | reg_data |= (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_XMIT_ACTIVE_MASK); |
| 386 | out_be32(addr + XEL_TSR_OFFSET, reg_data); |
| 387 | |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * xemaclite_recv_data - Receive a frame |
| 393 | * @drvdata: Pointer to the Emaclite device private data |
| 394 | * @data: Address where the data is to be received |
| 395 | * |
| 396 | * This function is intended to be called from the interrupt context or |
| 397 | * with a wrapper which waits for the receive frame to be available. |
| 398 | * |
| 399 | * Return: Total number of bytes received |
| 400 | */ |
| 401 | static u16 xemaclite_recv_data(struct net_local *drvdata, u8 *data) |
| 402 | { |
| 403 | void __iomem *addr; |
| 404 | u16 length, proto_type; |
| 405 | u32 reg_data; |
| 406 | |
| 407 | /* Determine the expected buffer address */ |
| 408 | addr = (drvdata->base_addr + drvdata->next_rx_buf_to_use); |
| 409 | |
| 410 | /* Verify which buffer has valid data */ |
| 411 | reg_data = in_be32(addr + XEL_RSR_OFFSET); |
| 412 | |
| 413 | if ((reg_data & XEL_RSR_RECV_DONE_MASK) == XEL_RSR_RECV_DONE_MASK) { |
| 414 | if (drvdata->rx_ping_pong != 0) |
| 415 | drvdata->next_rx_buf_to_use ^= XEL_BUFFER_OFFSET; |
| 416 | } else { |
| 417 | /* The instance is out of sync, try other buffer if other |
| 418 | * buffer is configured, return 0 otherwise. If the instance is |
| 419 | * out of sync, do not update the 'next_rx_buf_to_use' since it |
| 420 | * will correct on subsequent calls */ |
| 421 | if (drvdata->rx_ping_pong != 0) |
| 422 | addr = (void __iomem __force *)((u32 __force)addr ^ |
| 423 | XEL_BUFFER_OFFSET); |
| 424 | else |
| 425 | return 0; /* No data was available */ |
| 426 | |
| 427 | /* Verify that buffer has valid data */ |
| 428 | reg_data = in_be32(addr + XEL_RSR_OFFSET); |
| 429 | if ((reg_data & XEL_RSR_RECV_DONE_MASK) != |
| 430 | XEL_RSR_RECV_DONE_MASK) |
| 431 | return 0; /* No data was available */ |
| 432 | } |
| 433 | |
| 434 | /* Get the protocol type of the ethernet frame that arrived */ |
Michal Simek | 44180a5 | 2010-09-10 13:22:35 +0200 | [diff] [blame] | 435 | proto_type = ((ntohl(in_be32(addr + XEL_HEADER_OFFSET + |
| 436 | XEL_RXBUFF_OFFSET)) >> XEL_HEADER_SHIFT) & |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 437 | XEL_RPLR_LENGTH_MASK); |
| 438 | |
| 439 | /* Check if received ethernet frame is a raw ethernet frame |
| 440 | * or an IP packet or an ARP packet */ |
| 441 | if (proto_type > (ETH_FRAME_LEN + ETH_FCS_LEN)) { |
| 442 | |
| 443 | if (proto_type == ETH_P_IP) { |
Michal Simek | 44180a5 | 2010-09-10 13:22:35 +0200 | [diff] [blame] | 444 | length = ((ntohl(in_be32(addr + |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 445 | XEL_HEADER_IP_LENGTH_OFFSET + |
Michal Simek | 44180a5 | 2010-09-10 13:22:35 +0200 | [diff] [blame] | 446 | XEL_RXBUFF_OFFSET)) >> |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 447 | XEL_HEADER_SHIFT) & |
| 448 | XEL_RPLR_LENGTH_MASK); |
| 449 | length += ETH_HLEN + ETH_FCS_LEN; |
| 450 | |
| 451 | } else if (proto_type == ETH_P_ARP) |
| 452 | length = XEL_ARP_PACKET_SIZE + ETH_HLEN + ETH_FCS_LEN; |
| 453 | else |
| 454 | /* Field contains type other than IP or ARP, use max |
| 455 | * frame size and let user parse it */ |
| 456 | length = ETH_FRAME_LEN + ETH_FCS_LEN; |
| 457 | } else |
| 458 | /* Use the length in the frame, plus the header and trailer */ |
| 459 | length = proto_type + ETH_HLEN + ETH_FCS_LEN; |
| 460 | |
| 461 | /* Read from the EmacLite device */ |
| 462 | xemaclite_aligned_read((u32 __force *) (addr + XEL_RXBUFF_OFFSET), |
| 463 | data, length); |
| 464 | |
| 465 | /* Acknowledge the frame */ |
| 466 | reg_data = in_be32(addr + XEL_RSR_OFFSET); |
| 467 | reg_data &= ~XEL_RSR_RECV_DONE_MASK; |
| 468 | out_be32(addr + XEL_RSR_OFFSET, reg_data); |
| 469 | |
| 470 | return length; |
| 471 | } |
| 472 | |
| 473 | /** |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 474 | * xemaclite_update_address - Update the MAC address in the device |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 475 | * @drvdata: Pointer to the Emaclite device private data |
| 476 | * @address_ptr:Pointer to the MAC address (MAC address is a 48-bit value) |
| 477 | * |
| 478 | * Tx must be idle and Rx should be idle for deterministic results. |
| 479 | * It is recommended that this function should be called after the |
| 480 | * initialization and before transmission of any packets from the device. |
| 481 | * The MAC address can be programmed using any of the two transmit |
| 482 | * buffers (if configured). |
| 483 | */ |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 484 | static void xemaclite_update_address(struct net_local *drvdata, |
| 485 | u8 *address_ptr) |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 486 | { |
| 487 | void __iomem *addr; |
| 488 | u32 reg_data; |
| 489 | |
| 490 | /* Determine the expected Tx buffer address */ |
| 491 | addr = drvdata->base_addr + drvdata->next_tx_buf_to_use; |
| 492 | |
| 493 | xemaclite_aligned_write(address_ptr, (u32 __force *) addr, ETH_ALEN); |
| 494 | |
| 495 | out_be32(addr + XEL_TPLR_OFFSET, ETH_ALEN); |
| 496 | |
| 497 | /* Update the MAC address in the EmacLite */ |
| 498 | reg_data = in_be32(addr + XEL_TSR_OFFSET); |
| 499 | out_be32(addr + XEL_TSR_OFFSET, reg_data | XEL_TSR_PROG_MAC_ADDR); |
| 500 | |
| 501 | /* Wait for EmacLite to finish with the MAC address update */ |
| 502 | while ((in_be32(addr + XEL_TSR_OFFSET) & |
| 503 | XEL_TSR_PROG_MAC_ADDR) != 0) |
| 504 | ; |
| 505 | } |
| 506 | |
| 507 | /** |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 508 | * xemaclite_set_mac_address - Set the MAC address for this device |
| 509 | * @dev: Pointer to the network device instance |
| 510 | * @addr: Void pointer to the sockaddr structure |
| 511 | * |
| 512 | * This function copies the HW address from the sockaddr strucutre to the |
| 513 | * net_device structure and updates the address in HW. |
| 514 | * |
| 515 | * Return: Error if the net device is busy or 0 if the addr is set |
| 516 | * successfully |
| 517 | */ |
| 518 | static int xemaclite_set_mac_address(struct net_device *dev, void *address) |
| 519 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 520 | struct net_local *lp = netdev_priv(dev); |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 521 | struct sockaddr *addr = address; |
| 522 | |
| 523 | if (netif_running(dev)) |
| 524 | return -EBUSY; |
| 525 | |
| 526 | memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| 527 | xemaclite_update_address(lp, dev->dev_addr); |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | /** |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 532 | * xemaclite_tx_timeout - Callback for Tx Timeout |
| 533 | * @dev: Pointer to the network device |
| 534 | * |
| 535 | * This function is called when Tx time out occurs for Emaclite device. |
| 536 | */ |
| 537 | static void xemaclite_tx_timeout(struct net_device *dev) |
| 538 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 539 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 540 | unsigned long flags; |
| 541 | |
| 542 | dev_err(&lp->ndev->dev, "Exceeded transmit timeout of %lu ms\n", |
| 543 | TX_TIMEOUT * 1000UL / HZ); |
| 544 | |
| 545 | dev->stats.tx_errors++; |
| 546 | |
| 547 | /* Reset the device */ |
| 548 | spin_lock_irqsave(&lp->reset_lock, flags); |
| 549 | |
| 550 | /* Shouldn't really be necessary, but shouldn't hurt */ |
| 551 | netif_stop_queue(dev); |
| 552 | |
| 553 | xemaclite_disable_interrupts(lp); |
| 554 | xemaclite_enable_interrupts(lp); |
| 555 | |
| 556 | if (lp->deferred_skb) { |
| 557 | dev_kfree_skb(lp->deferred_skb); |
| 558 | lp->deferred_skb = NULL; |
| 559 | dev->stats.tx_errors++; |
| 560 | } |
| 561 | |
| 562 | /* To exclude tx timeout */ |
Eric Dumazet | 1ae5dc3 | 2010-05-10 05:01:31 -0700 | [diff] [blame] | 563 | dev->trans_start = jiffies; /* prevent tx timeout */ |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 564 | |
| 565 | /* We're all ready to go. Start the queue */ |
| 566 | netif_wake_queue(dev); |
| 567 | spin_unlock_irqrestore(&lp->reset_lock, flags); |
| 568 | } |
| 569 | |
| 570 | /**********************/ |
| 571 | /* Interrupt Handlers */ |
| 572 | /**********************/ |
| 573 | |
| 574 | /** |
| 575 | * xemaclite_tx_handler - Interrupt handler for frames sent |
| 576 | * @dev: Pointer to the network device |
| 577 | * |
| 578 | * This function updates the number of packets transmitted and handles the |
| 579 | * deferred skb, if there is one. |
| 580 | */ |
| 581 | static void xemaclite_tx_handler(struct net_device *dev) |
| 582 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 583 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 584 | |
| 585 | dev->stats.tx_packets++; |
| 586 | if (lp->deferred_skb) { |
| 587 | if (xemaclite_send_data(lp, |
| 588 | (u8 *) lp->deferred_skb->data, |
| 589 | lp->deferred_skb->len) != 0) |
| 590 | return; |
| 591 | else { |
| 592 | dev->stats.tx_bytes += lp->deferred_skb->len; |
| 593 | dev_kfree_skb_irq(lp->deferred_skb); |
| 594 | lp->deferred_skb = NULL; |
Eric Dumazet | 1ae5dc3 | 2010-05-10 05:01:31 -0700 | [diff] [blame] | 595 | dev->trans_start = jiffies; /* prevent tx timeout */ |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 596 | netif_wake_queue(dev); |
| 597 | } |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /** |
| 602 | * xemaclite_rx_handler- Interrupt handler for frames received |
| 603 | * @dev: Pointer to the network device |
| 604 | * |
| 605 | * This function allocates memory for a socket buffer, fills it with data |
| 606 | * received and hands it over to the TCP/IP stack. |
| 607 | */ |
| 608 | static void xemaclite_rx_handler(struct net_device *dev) |
| 609 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 610 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 611 | struct sk_buff *skb; |
| 612 | unsigned int align; |
| 613 | u32 len; |
| 614 | |
| 615 | len = ETH_FRAME_LEN + ETH_FCS_LEN; |
| 616 | skb = dev_alloc_skb(len + ALIGNMENT); |
| 617 | if (!skb) { |
| 618 | /* Couldn't get memory. */ |
| 619 | dev->stats.rx_dropped++; |
| 620 | dev_err(&lp->ndev->dev, "Could not allocate receive buffer\n"); |
| 621 | return; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * A new skb should have the data halfword aligned, but this code is |
| 626 | * here just in case that isn't true. Calculate how many |
| 627 | * bytes we should reserve to get the data to start on a word |
| 628 | * boundary */ |
| 629 | align = BUFFER_ALIGN(skb->data); |
| 630 | if (align) |
| 631 | skb_reserve(skb, align); |
| 632 | |
| 633 | skb_reserve(skb, 2); |
| 634 | |
| 635 | len = xemaclite_recv_data(lp, (u8 *) skb->data); |
| 636 | |
| 637 | if (!len) { |
| 638 | dev->stats.rx_errors++; |
| 639 | dev_kfree_skb_irq(skb); |
| 640 | return; |
| 641 | } |
| 642 | |
| 643 | skb_put(skb, len); /* Tell the skb how much data we got */ |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 644 | |
| 645 | skb->protocol = eth_type_trans(skb, dev); |
Eric Dumazet | bc8acf2 | 2010-09-02 13:07:41 -0700 | [diff] [blame] | 646 | skb_checksum_none_assert(skb); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 647 | |
| 648 | dev->stats.rx_packets++; |
| 649 | dev->stats.rx_bytes += len; |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 650 | |
| 651 | netif_rx(skb); /* Send the packet upstream */ |
| 652 | } |
| 653 | |
| 654 | /** |
| 655 | * xemaclite_interrupt - Interrupt handler for this driver |
| 656 | * @irq: Irq of the Emaclite device |
| 657 | * @dev_id: Void pointer to the network device instance used as callback |
| 658 | * reference |
| 659 | * |
| 660 | * This function handles the Tx and Rx interrupts of the EmacLite device. |
| 661 | */ |
| 662 | static irqreturn_t xemaclite_interrupt(int irq, void *dev_id) |
| 663 | { |
| 664 | bool tx_complete = 0; |
| 665 | struct net_device *dev = dev_id; |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 666 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 667 | void __iomem *base_addr = lp->base_addr; |
| 668 | u32 tx_status; |
| 669 | |
| 670 | /* Check if there is Rx Data available */ |
| 671 | if ((in_be32(base_addr + XEL_RSR_OFFSET) & XEL_RSR_RECV_DONE_MASK) || |
| 672 | (in_be32(base_addr + XEL_BUFFER_OFFSET + XEL_RSR_OFFSET) |
| 673 | & XEL_RSR_RECV_DONE_MASK)) |
| 674 | |
| 675 | xemaclite_rx_handler(dev); |
| 676 | |
| 677 | /* Check if the Transmission for the first buffer is completed */ |
| 678 | tx_status = in_be32(base_addr + XEL_TSR_OFFSET); |
| 679 | if (((tx_status & XEL_TSR_XMIT_BUSY_MASK) == 0) && |
| 680 | (tx_status & XEL_TSR_XMIT_ACTIVE_MASK) != 0) { |
| 681 | |
| 682 | tx_status &= ~XEL_TSR_XMIT_ACTIVE_MASK; |
| 683 | out_be32(base_addr + XEL_TSR_OFFSET, tx_status); |
| 684 | |
| 685 | tx_complete = 1; |
| 686 | } |
| 687 | |
| 688 | /* Check if the Transmission for the second buffer is completed */ |
| 689 | tx_status = in_be32(base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET); |
| 690 | if (((tx_status & XEL_TSR_XMIT_BUSY_MASK) == 0) && |
| 691 | (tx_status & XEL_TSR_XMIT_ACTIVE_MASK) != 0) { |
| 692 | |
| 693 | tx_status &= ~XEL_TSR_XMIT_ACTIVE_MASK; |
| 694 | out_be32(base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET, |
| 695 | tx_status); |
| 696 | |
| 697 | tx_complete = 1; |
| 698 | } |
| 699 | |
| 700 | /* If there was a Tx interrupt, call the Tx Handler */ |
| 701 | if (tx_complete != 0) |
| 702 | xemaclite_tx_handler(dev); |
| 703 | |
| 704 | return IRQ_HANDLED; |
| 705 | } |
| 706 | |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 707 | /**********************/ |
| 708 | /* MDIO Bus functions */ |
| 709 | /**********************/ |
| 710 | |
| 711 | /** |
| 712 | * xemaclite_mdio_wait - Wait for the MDIO to be ready to use |
| 713 | * @lp: Pointer to the Emaclite device private data |
| 714 | * |
| 715 | * This function waits till the device is ready to accept a new MDIO |
| 716 | * request. |
| 717 | * |
| 718 | * Return: 0 for success or ETIMEDOUT for a timeout |
| 719 | */ |
| 720 | |
| 721 | static int xemaclite_mdio_wait(struct net_local *lp) |
| 722 | { |
| 723 | long end = jiffies + 2; |
| 724 | |
| 725 | /* wait for the MDIO interface to not be busy or timeout |
| 726 | after some time. |
| 727 | */ |
| 728 | while (in_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET) & |
| 729 | XEL_MDIOCTRL_MDIOSTS_MASK) { |
| 730 | if (end - jiffies <= 0) { |
| 731 | WARN_ON(1); |
| 732 | return -ETIMEDOUT; |
| 733 | } |
| 734 | msleep(1); |
| 735 | } |
| 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | /** |
| 740 | * xemaclite_mdio_read - Read from a given MII management register |
| 741 | * @bus: the mii_bus struct |
| 742 | * @phy_id: the phy address |
| 743 | * @reg: register number to read from |
| 744 | * |
| 745 | * This function waits till the device is ready to accept a new MDIO |
| 746 | * request and then writes the phy address to the MDIO Address register |
| 747 | * and reads data from MDIO Read Data register, when its available. |
| 748 | * |
| 749 | * Return: Value read from the MII management register |
| 750 | */ |
| 751 | static int xemaclite_mdio_read(struct mii_bus *bus, int phy_id, int reg) |
| 752 | { |
| 753 | struct net_local *lp = bus->priv; |
| 754 | u32 ctrl_reg; |
| 755 | u32 rc; |
| 756 | |
| 757 | if (xemaclite_mdio_wait(lp)) |
| 758 | return -ETIMEDOUT; |
| 759 | |
| 760 | /* Write the PHY address, register number and set the OP bit in the |
| 761 | * MDIO Address register. Set the Status bit in the MDIO Control |
| 762 | * register to start a MDIO read transaction. |
| 763 | */ |
| 764 | ctrl_reg = in_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET); |
| 765 | out_be32(lp->base_addr + XEL_MDIOADDR_OFFSET, |
| 766 | XEL_MDIOADDR_OP_MASK | |
| 767 | ((phy_id << XEL_MDIOADDR_PHYADR_SHIFT) | reg)); |
| 768 | out_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET, |
| 769 | ctrl_reg | XEL_MDIOCTRL_MDIOSTS_MASK); |
| 770 | |
| 771 | if (xemaclite_mdio_wait(lp)) |
| 772 | return -ETIMEDOUT; |
| 773 | |
| 774 | rc = in_be32(lp->base_addr + XEL_MDIORD_OFFSET); |
| 775 | |
| 776 | dev_dbg(&lp->ndev->dev, |
| 777 | "xemaclite_mdio_read(phy_id=%i, reg=%x) == %x\n", |
| 778 | phy_id, reg, rc); |
| 779 | |
| 780 | return rc; |
| 781 | } |
| 782 | |
| 783 | /** |
| 784 | * xemaclite_mdio_write - Write to a given MII management register |
| 785 | * @bus: the mii_bus struct |
| 786 | * @phy_id: the phy address |
| 787 | * @reg: register number to write to |
| 788 | * @val: value to write to the register number specified by reg |
| 789 | * |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 790 | * This function waits till the device is ready to accept a new MDIO |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 791 | * request and then writes the val to the MDIO Write Data register. |
| 792 | */ |
| 793 | static int xemaclite_mdio_write(struct mii_bus *bus, int phy_id, int reg, |
| 794 | u16 val) |
| 795 | { |
| 796 | struct net_local *lp = bus->priv; |
| 797 | u32 ctrl_reg; |
| 798 | |
| 799 | dev_dbg(&lp->ndev->dev, |
| 800 | "xemaclite_mdio_write(phy_id=%i, reg=%x, val=%x)\n", |
| 801 | phy_id, reg, val); |
| 802 | |
| 803 | if (xemaclite_mdio_wait(lp)) |
| 804 | return -ETIMEDOUT; |
| 805 | |
| 806 | /* Write the PHY address, register number and clear the OP bit in the |
| 807 | * MDIO Address register and then write the value into the MDIO Write |
| 808 | * Data register. Finally, set the Status bit in the MDIO Control |
| 809 | * register to start a MDIO write transaction. |
| 810 | */ |
| 811 | ctrl_reg = in_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET); |
| 812 | out_be32(lp->base_addr + XEL_MDIOADDR_OFFSET, |
| 813 | ~XEL_MDIOADDR_OP_MASK & |
| 814 | ((phy_id << XEL_MDIOADDR_PHYADR_SHIFT) | reg)); |
| 815 | out_be32(lp->base_addr + XEL_MDIOWR_OFFSET, val); |
| 816 | out_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET, |
| 817 | ctrl_reg | XEL_MDIOCTRL_MDIOSTS_MASK); |
| 818 | |
| 819 | return 0; |
| 820 | } |
| 821 | |
| 822 | /** |
| 823 | * xemaclite_mdio_reset - Reset the mdio bus. |
| 824 | * @bus: Pointer to the MII bus |
| 825 | * |
| 826 | * This function is required(?) as per Documentation/networking/phy.txt. |
| 827 | * There is no reset in this device; this function always returns 0. |
| 828 | */ |
| 829 | static int xemaclite_mdio_reset(struct mii_bus *bus) |
| 830 | { |
| 831 | return 0; |
| 832 | } |
| 833 | |
| 834 | /** |
| 835 | * xemaclite_mdio_setup - Register mii_bus for the Emaclite device |
| 836 | * @lp: Pointer to the Emaclite device private data |
| 837 | * @ofdev: Pointer to OF device structure |
| 838 | * |
| 839 | * This function enables MDIO bus in the Emaclite device and registers a |
| 840 | * mii_bus. |
| 841 | * |
| 842 | * Return: 0 upon success or a negative error upon failure |
| 843 | */ |
| 844 | static int xemaclite_mdio_setup(struct net_local *lp, struct device *dev) |
| 845 | { |
| 846 | struct mii_bus *bus; |
| 847 | int rc; |
| 848 | struct resource res; |
| 849 | struct device_node *np = of_get_parent(lp->phy_node); |
| 850 | |
| 851 | /* Don't register the MDIO bus if the phy_node or its parent node |
| 852 | * can't be found. |
| 853 | */ |
| 854 | if (!np) |
| 855 | return -ENODEV; |
| 856 | |
| 857 | /* Enable the MDIO bus by asserting the enable bit in MDIO Control |
| 858 | * register. |
| 859 | */ |
| 860 | out_be32(lp->base_addr + XEL_MDIOCTRL_OFFSET, |
| 861 | XEL_MDIOCTRL_MDIOEN_MASK); |
| 862 | |
| 863 | bus = mdiobus_alloc(); |
| 864 | if (!bus) |
| 865 | return -ENOMEM; |
| 866 | |
| 867 | of_address_to_resource(np, 0, &res); |
| 868 | snprintf(bus->id, MII_BUS_ID_SIZE, "%.8llx", |
| 869 | (unsigned long long)res.start); |
| 870 | bus->priv = lp; |
| 871 | bus->name = "Xilinx Emaclite MDIO"; |
| 872 | bus->read = xemaclite_mdio_read; |
| 873 | bus->write = xemaclite_mdio_write; |
| 874 | bus->reset = xemaclite_mdio_reset; |
| 875 | bus->parent = dev; |
| 876 | bus->irq = lp->mdio_irqs; /* preallocated IRQ table */ |
| 877 | |
| 878 | lp->mii_bus = bus; |
| 879 | |
| 880 | rc = of_mdiobus_register(bus, np); |
| 881 | if (rc) |
| 882 | goto err_register; |
| 883 | |
| 884 | return 0; |
| 885 | |
| 886 | err_register: |
| 887 | mdiobus_free(bus); |
| 888 | return rc; |
| 889 | } |
| 890 | |
| 891 | /** |
| 892 | * xemaclite_adjust_link - Link state callback for the Emaclite device |
| 893 | * @ndev: pointer to net_device struct |
| 894 | * |
| 895 | * There's nothing in the Emaclite device to be configured when the link |
| 896 | * state changes. We just print the status. |
| 897 | */ |
| 898 | void xemaclite_adjust_link(struct net_device *ndev) |
| 899 | { |
| 900 | struct net_local *lp = netdev_priv(ndev); |
| 901 | struct phy_device *phy = lp->phy_dev; |
| 902 | int link_state; |
| 903 | |
| 904 | /* hash together the state values to decide if something has changed */ |
| 905 | link_state = phy->speed | (phy->duplex << 1) | phy->link; |
| 906 | |
| 907 | if (lp->last_link != link_state) { |
| 908 | lp->last_link = link_state; |
| 909 | phy_print_status(phy); |
| 910 | } |
| 911 | } |
| 912 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 913 | /** |
| 914 | * xemaclite_open - Open the network device |
| 915 | * @dev: Pointer to the network device |
| 916 | * |
| 917 | * This function sets the MAC address, requests an IRQ and enables interrupts |
| 918 | * for the Emaclite device and starts the Tx queue. |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 919 | * It also connects to the phy device, if MDIO is included in Emaclite device. |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 920 | */ |
| 921 | static int xemaclite_open(struct net_device *dev) |
| 922 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 923 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 924 | int retval; |
| 925 | |
| 926 | /* Just to be safe, stop the device first */ |
| 927 | xemaclite_disable_interrupts(lp); |
| 928 | |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 929 | if (lp->phy_node) { |
| 930 | u32 bmcr; |
| 931 | |
| 932 | lp->phy_dev = of_phy_connect(lp->ndev, lp->phy_node, |
| 933 | xemaclite_adjust_link, 0, |
| 934 | PHY_INTERFACE_MODE_MII); |
| 935 | if (!lp->phy_dev) { |
| 936 | dev_err(&lp->ndev->dev, "of_phy_connect() failed\n"); |
| 937 | return -ENODEV; |
| 938 | } |
| 939 | |
| 940 | /* EmacLite doesn't support giga-bit speeds */ |
| 941 | lp->phy_dev->supported &= (PHY_BASIC_FEATURES); |
| 942 | lp->phy_dev->advertising = lp->phy_dev->supported; |
| 943 | |
| 944 | /* Don't advertise 1000BASE-T Full/Half duplex speeds */ |
| 945 | phy_write(lp->phy_dev, MII_CTRL1000, 0); |
| 946 | |
| 947 | /* Advertise only 10 and 100mbps full/half duplex speeds */ |
| 948 | phy_write(lp->phy_dev, MII_ADVERTISE, ADVERTISE_ALL); |
| 949 | |
| 950 | /* Restart auto negotiation */ |
| 951 | bmcr = phy_read(lp->phy_dev, MII_BMCR); |
| 952 | bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART); |
| 953 | phy_write(lp->phy_dev, MII_BMCR, bmcr); |
| 954 | |
| 955 | phy_start(lp->phy_dev); |
| 956 | } |
| 957 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 958 | /* Set the MAC address each time opened */ |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 959 | xemaclite_update_address(lp, dev->dev_addr); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 960 | |
| 961 | /* Grab the IRQ */ |
Joe Perches | a0607fd | 2009-11-18 23:29:17 -0800 | [diff] [blame] | 962 | retval = request_irq(dev->irq, xemaclite_interrupt, 0, dev->name, dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 963 | if (retval) { |
| 964 | dev_err(&lp->ndev->dev, "Could not allocate interrupt %d\n", |
| 965 | dev->irq); |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 966 | if (lp->phy_dev) |
| 967 | phy_disconnect(lp->phy_dev); |
| 968 | lp->phy_dev = NULL; |
| 969 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 970 | return retval; |
| 971 | } |
| 972 | |
| 973 | /* Enable Interrupts */ |
| 974 | xemaclite_enable_interrupts(lp); |
| 975 | |
| 976 | /* We're ready to go */ |
| 977 | netif_start_queue(dev); |
| 978 | |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | /** |
| 983 | * xemaclite_close - Close the network device |
| 984 | * @dev: Pointer to the network device |
| 985 | * |
| 986 | * This function stops the Tx queue, disables interrupts and frees the IRQ for |
| 987 | * the Emaclite device. |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 988 | * It also disconnects the phy device associated with the Emaclite device. |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 989 | */ |
| 990 | static int xemaclite_close(struct net_device *dev) |
| 991 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 992 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 993 | |
| 994 | netif_stop_queue(dev); |
| 995 | xemaclite_disable_interrupts(lp); |
| 996 | free_irq(dev->irq, dev); |
| 997 | |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 998 | if (lp->phy_dev) |
| 999 | phy_disconnect(lp->phy_dev); |
| 1000 | lp->phy_dev = NULL; |
| 1001 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1002 | return 0; |
| 1003 | } |
| 1004 | |
| 1005 | /** |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1006 | * xemaclite_send - Transmit a frame |
| 1007 | * @orig_skb: Pointer to the socket buffer to be transmitted |
| 1008 | * @dev: Pointer to the network device |
| 1009 | * |
| 1010 | * This function checks if the Tx buffer of the Emaclite device is free to send |
| 1011 | * data. If so, it fills the Tx buffer with data from socket buffer data, |
| 1012 | * updates the stats and frees the socket buffer. The Tx completion is signaled |
| 1013 | * by an interrupt. If the Tx buffer isn't free, then the socket buffer is |
| 1014 | * deferred and the Tx queue is stopped so that the deferred socket buffer can |
| 1015 | * be transmitted when the Emaclite device is free to transmit data. |
| 1016 | * |
| 1017 | * Return: 0, always. |
| 1018 | */ |
| 1019 | static int xemaclite_send(struct sk_buff *orig_skb, struct net_device *dev) |
| 1020 | { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 1021 | struct net_local *lp = netdev_priv(dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1022 | struct sk_buff *new_skb; |
| 1023 | unsigned int len; |
| 1024 | unsigned long flags; |
| 1025 | |
| 1026 | len = orig_skb->len; |
| 1027 | |
| 1028 | new_skb = orig_skb; |
| 1029 | |
| 1030 | spin_lock_irqsave(&lp->reset_lock, flags); |
| 1031 | if (xemaclite_send_data(lp, (u8 *) new_skb->data, len) != 0) { |
| 1032 | /* If the Emaclite Tx buffer is busy, stop the Tx queue and |
| 1033 | * defer the skb for transmission at a later point when the |
| 1034 | * current transmission is complete */ |
| 1035 | netif_stop_queue(dev); |
| 1036 | lp->deferred_skb = new_skb; |
| 1037 | spin_unlock_irqrestore(&lp->reset_lock, flags); |
| 1038 | return 0; |
| 1039 | } |
| 1040 | spin_unlock_irqrestore(&lp->reset_lock, flags); |
| 1041 | |
| 1042 | dev->stats.tx_bytes += len; |
| 1043 | dev_kfree_skb(new_skb); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1044 | |
| 1045 | return 0; |
| 1046 | } |
| 1047 | |
| 1048 | /** |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1049 | * xemaclite_remove_ndev - Free the network device |
| 1050 | * @ndev: Pointer to the network device to be freed |
| 1051 | * |
| 1052 | * This function un maps the IO region of the Emaclite device and frees the net |
| 1053 | * device. |
| 1054 | */ |
| 1055 | static void xemaclite_remove_ndev(struct net_device *ndev) |
| 1056 | { |
| 1057 | if (ndev) { |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 1058 | struct net_local *lp = netdev_priv(ndev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1059 | |
| 1060 | if (lp->base_addr) |
| 1061 | iounmap((void __iomem __force *) (lp->base_addr)); |
| 1062 | free_netdev(ndev); |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | /** |
| 1067 | * get_bool - Get a parameter from the OF device |
| 1068 | * @ofdev: Pointer to OF device structure |
| 1069 | * @s: Property to be retrieved |
| 1070 | * |
| 1071 | * This function looks for a property in the device node and returns the value |
| 1072 | * of the property if its found or 0 if the property is not found. |
| 1073 | * |
| 1074 | * Return: Value of the parameter if the parameter is found, or 0 otherwise |
| 1075 | */ |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 1076 | static bool get_bool(struct platform_device *ofdev, const char *s) |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1077 | { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1078 | u32 *p = (u32 *)of_get_property(ofdev->dev.of_node, s, NULL); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1079 | |
| 1080 | if (p) { |
| 1081 | return (bool)*p; |
| 1082 | } else { |
| 1083 | dev_warn(&ofdev->dev, "Parameter %s not found," |
| 1084 | "defaulting to false\n", s); |
| 1085 | return 0; |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | static struct net_device_ops xemaclite_netdev_ops; |
| 1090 | |
| 1091 | /** |
| 1092 | * xemaclite_of_probe - Probe method for the Emaclite device. |
| 1093 | * @ofdev: Pointer to OF device structure |
| 1094 | * @match: Pointer to the structure used for matching a device |
| 1095 | * |
| 1096 | * This function probes for the Emaclite device in the device tree. |
| 1097 | * It initializes the driver data structure and the hardware, sets the MAC |
| 1098 | * address and registers the network device. |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1099 | * It also registers a mii_bus for the Emaclite device, if MDIO is included |
| 1100 | * in the device. |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1101 | * |
| 1102 | * Return: 0, if the driver is bound to the Emaclite device, or |
| 1103 | * a negative error if there is failure. |
| 1104 | */ |
Grant Likely | 7488876 | 2011-02-22 21:05:51 -0700 | [diff] [blame] | 1105 | static int __devinit xemaclite_of_probe(struct platform_device *ofdev) |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1106 | { |
| 1107 | struct resource r_irq; /* Interrupt resources */ |
| 1108 | struct resource r_mem; /* IO mem resources */ |
| 1109 | struct net_device *ndev = NULL; |
| 1110 | struct net_local *lp = NULL; |
| 1111 | struct device *dev = &ofdev->dev; |
| 1112 | const void *mac_address; |
| 1113 | |
| 1114 | int rc = 0; |
| 1115 | |
| 1116 | dev_info(dev, "Device Tree Probing\n"); |
| 1117 | |
| 1118 | /* Get iospace for the device */ |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1119 | rc = of_address_to_resource(ofdev->dev.of_node, 0, &r_mem); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1120 | if (rc) { |
| 1121 | dev_err(dev, "invalid address\n"); |
| 1122 | return rc; |
| 1123 | } |
| 1124 | |
| 1125 | /* Get IRQ for the device */ |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1126 | rc = of_irq_to_resource(ofdev->dev.of_node, 0, &r_irq); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1127 | if (rc == NO_IRQ) { |
| 1128 | dev_err(dev, "no IRQ found\n"); |
| 1129 | return rc; |
| 1130 | } |
| 1131 | |
| 1132 | /* Create an ethernet device instance */ |
| 1133 | ndev = alloc_etherdev(sizeof(struct net_local)); |
| 1134 | if (!ndev) { |
| 1135 | dev_err(dev, "Could not allocate network device\n"); |
| 1136 | return -ENOMEM; |
| 1137 | } |
| 1138 | |
| 1139 | dev_set_drvdata(dev, ndev); |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1140 | SET_NETDEV_DEV(ndev, &ofdev->dev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1141 | |
| 1142 | ndev->irq = r_irq.start; |
| 1143 | ndev->mem_start = r_mem.start; |
| 1144 | ndev->mem_end = r_mem.end; |
| 1145 | |
| 1146 | lp = netdev_priv(ndev); |
| 1147 | lp->ndev = ndev; |
| 1148 | |
| 1149 | if (!request_mem_region(ndev->mem_start, |
| 1150 | ndev->mem_end - ndev->mem_start + 1, |
| 1151 | DRIVER_NAME)) { |
| 1152 | dev_err(dev, "Couldn't lock memory region at %p\n", |
| 1153 | (void *)ndev->mem_start); |
| 1154 | rc = -EBUSY; |
| 1155 | goto error2; |
| 1156 | } |
| 1157 | |
| 1158 | /* Get the virtual base address for the device */ |
Tobias Klauser | 575400b | 2010-05-05 22:12:20 +0000 | [diff] [blame] | 1159 | lp->base_addr = ioremap(r_mem.start, resource_size(&r_mem)); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1160 | if (NULL == lp->base_addr) { |
| 1161 | dev_err(dev, "EmacLite: Could not allocate iomem\n"); |
| 1162 | rc = -EIO; |
| 1163 | goto error1; |
| 1164 | } |
| 1165 | |
| 1166 | spin_lock_init(&lp->reset_lock); |
| 1167 | lp->next_tx_buf_to_use = 0x0; |
| 1168 | lp->next_rx_buf_to_use = 0x0; |
| 1169 | lp->tx_ping_pong = get_bool(ofdev, "xlnx,tx-ping-pong"); |
| 1170 | lp->rx_ping_pong = get_bool(ofdev, "xlnx,rx-ping-pong"); |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1171 | mac_address = of_get_mac_address(ofdev->dev.of_node); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1172 | |
| 1173 | if (mac_address) |
| 1174 | /* Set the MAC address. */ |
| 1175 | memcpy(ndev->dev_addr, mac_address, 6); |
| 1176 | else |
| 1177 | dev_warn(dev, "No MAC address found\n"); |
| 1178 | |
| 1179 | /* Clear the Tx CSR's in case this is a restart */ |
| 1180 | out_be32(lp->base_addr + XEL_TSR_OFFSET, 0); |
| 1181 | out_be32(lp->base_addr + XEL_BUFFER_OFFSET + XEL_TSR_OFFSET, 0); |
| 1182 | |
| 1183 | /* Set the MAC address in the EmacLite device */ |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1184 | xemaclite_update_address(lp, ndev->dev_addr); |
| 1185 | |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 1186 | lp->phy_node = of_parse_phandle(ofdev->dev.of_node, "phy-handle", 0); |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1187 | rc = xemaclite_mdio_setup(lp, &ofdev->dev); |
| 1188 | if (rc) |
| 1189 | dev_warn(&ofdev->dev, "error registering MDIO bus\n"); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1190 | |
H Hartley Sweeten | 5491f3a | 2009-12-29 20:04:53 -0800 | [diff] [blame] | 1191 | dev_info(dev, "MAC address is now %pM\n", ndev->dev_addr); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1192 | |
| 1193 | ndev->netdev_ops = &xemaclite_netdev_ops; |
| 1194 | ndev->flags &= ~IFF_MULTICAST; |
| 1195 | ndev->watchdog_timeo = TX_TIMEOUT; |
| 1196 | |
| 1197 | /* Finally, register the device */ |
| 1198 | rc = register_netdev(ndev); |
| 1199 | if (rc) { |
| 1200 | dev_err(dev, |
| 1201 | "Cannot register network device, aborting\n"); |
| 1202 | goto error1; |
| 1203 | } |
| 1204 | |
| 1205 | dev_info(dev, |
| 1206 | "Xilinx EmacLite at 0x%08X mapped to 0x%08X, irq=%d\n", |
| 1207 | (unsigned int __force)ndev->mem_start, |
| 1208 | (unsigned int __force)lp->base_addr, ndev->irq); |
| 1209 | return 0; |
| 1210 | |
| 1211 | error1: |
Tobias Klauser | 575400b | 2010-05-05 22:12:20 +0000 | [diff] [blame] | 1212 | release_mem_region(ndev->mem_start, resource_size(&r_mem)); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1213 | |
| 1214 | error2: |
| 1215 | xemaclite_remove_ndev(ndev); |
| 1216 | return rc; |
| 1217 | } |
| 1218 | |
| 1219 | /** |
| 1220 | * xemaclite_of_remove - Unbind the driver from the Emaclite device. |
| 1221 | * @of_dev: Pointer to OF device structure |
| 1222 | * |
| 1223 | * This function is called if a device is physically removed from the system or |
| 1224 | * if the driver module is being unloaded. It frees any resources allocated to |
| 1225 | * the device. |
| 1226 | * |
| 1227 | * Return: 0, always. |
| 1228 | */ |
Grant Likely | 2dc1158 | 2010-08-06 09:25:50 -0600 | [diff] [blame] | 1229 | static int __devexit xemaclite_of_remove(struct platform_device *of_dev) |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1230 | { |
| 1231 | struct device *dev = &of_dev->dev; |
| 1232 | struct net_device *ndev = dev_get_drvdata(dev); |
| 1233 | |
Joe Perches | ece4915 | 2010-11-15 11:12:31 +0000 | [diff] [blame] | 1234 | struct net_local *lp = netdev_priv(ndev); |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1235 | |
| 1236 | /* Un-register the mii_bus, if configured */ |
| 1237 | if (lp->has_mdio) { |
| 1238 | mdiobus_unregister(lp->mii_bus); |
| 1239 | kfree(lp->mii_bus->irq); |
| 1240 | mdiobus_free(lp->mii_bus); |
| 1241 | lp->mii_bus = NULL; |
| 1242 | } |
| 1243 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1244 | unregister_netdev(ndev); |
| 1245 | |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1246 | if (lp->phy_node) |
| 1247 | of_node_put(lp->phy_node); |
| 1248 | lp->phy_node = NULL; |
| 1249 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1250 | release_mem_region(ndev->mem_start, ndev->mem_end-ndev->mem_start + 1); |
| 1251 | |
| 1252 | xemaclite_remove_ndev(ndev); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1253 | dev_set_drvdata(dev, NULL); |
| 1254 | |
| 1255 | return 0; |
| 1256 | } |
| 1257 | |
Michal Simek | 357e8b5 | 2010-08-18 01:22:49 +0000 | [diff] [blame] | 1258 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1259 | static void |
| 1260 | xemaclite_poll_controller(struct net_device *ndev) |
| 1261 | { |
| 1262 | disable_irq(ndev->irq); |
| 1263 | xemaclite_interrupt(ndev->irq, ndev); |
| 1264 | enable_irq(ndev->irq); |
| 1265 | } |
| 1266 | #endif |
| 1267 | |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1268 | static struct net_device_ops xemaclite_netdev_ops = { |
| 1269 | .ndo_open = xemaclite_open, |
| 1270 | .ndo_stop = xemaclite_close, |
| 1271 | .ndo_start_xmit = xemaclite_send, |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1272 | .ndo_set_mac_address = xemaclite_set_mac_address, |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1273 | .ndo_tx_timeout = xemaclite_tx_timeout, |
Michal Simek | 357e8b5 | 2010-08-18 01:22:49 +0000 | [diff] [blame] | 1274 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 1275 | .ndo_poll_controller = xemaclite_poll_controller, |
| 1276 | #endif |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1277 | }; |
| 1278 | |
| 1279 | /* Match table for OF platform binding */ |
| 1280 | static struct of_device_id xemaclite_of_match[] __devinitdata = { |
| 1281 | { .compatible = "xlnx,opb-ethernetlite-1.01.a", }, |
| 1282 | { .compatible = "xlnx,opb-ethernetlite-1.01.b", }, |
| 1283 | { .compatible = "xlnx,xps-ethernetlite-1.00.a", }, |
| 1284 | { .compatible = "xlnx,xps-ethernetlite-2.00.a", }, |
| 1285 | { .compatible = "xlnx,xps-ethernetlite-2.01.a", }, |
John Linn | 5cdaaa1 | 2010-02-15 21:51:00 -0800 | [diff] [blame] | 1286 | { .compatible = "xlnx,xps-ethernetlite-3.00.a", }, |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1287 | { /* end of list */ }, |
| 1288 | }; |
| 1289 | MODULE_DEVICE_TABLE(of, xemaclite_of_match); |
| 1290 | |
Grant Likely | 7488876 | 2011-02-22 21:05:51 -0700 | [diff] [blame] | 1291 | static struct platform_driver xemaclite_of_driver = { |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 1292 | .driver = { |
| 1293 | .name = DRIVER_NAME, |
| 1294 | .owner = THIS_MODULE, |
| 1295 | .of_match_table = xemaclite_of_match, |
| 1296 | }, |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1297 | .probe = xemaclite_of_probe, |
| 1298 | .remove = __devexit_p(xemaclite_of_remove), |
| 1299 | }; |
| 1300 | |
| 1301 | /** |
| 1302 | * xgpiopss_init - Initial driver registration call |
| 1303 | * |
| 1304 | * Return: 0 upon success, or a negative error upon failure. |
| 1305 | */ |
| 1306 | static int __init xemaclite_init(void) |
| 1307 | { |
| 1308 | /* No kernel boot options used, we just need to register the driver */ |
Grant Likely | 7488876 | 2011-02-22 21:05:51 -0700 | [diff] [blame] | 1309 | return platform_driver_register(&xemaclite_of_driver); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | /** |
| 1313 | * xemaclite_cleanup - Driver un-registration call |
| 1314 | */ |
| 1315 | static void __exit xemaclite_cleanup(void) |
| 1316 | { |
Grant Likely | 7488876 | 2011-02-22 21:05:51 -0700 | [diff] [blame] | 1317 | platform_driver_unregister(&xemaclite_of_driver); |
John Linn | bb81b2d | 2009-08-20 02:52:16 -0700 | [diff] [blame] | 1318 | } |
| 1319 | |
| 1320 | module_init(xemaclite_init); |
| 1321 | module_exit(xemaclite_cleanup); |
| 1322 | |
| 1323 | MODULE_AUTHOR("Xilinx, Inc."); |
| 1324 | MODULE_DESCRIPTION("Xilinx Ethernet MAC Lite driver"); |
| 1325 | MODULE_LICENSE("GPL"); |