Po-Yu Chuang | 50253b8 | 2009-08-10 11:00:00 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Faraday FTMAC100 Ethernet |
| 3 | * |
| 4 | * (C) Copyright 2009 Faraday Technology |
| 5 | * Po-Yu Chuang <ratbert@faraday-tech.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <config.h> |
| 23 | #include <common.h> |
| 24 | #include <malloc.h> |
| 25 | #include <net.h> |
| 26 | #include <asm/io.h> |
| 27 | |
| 28 | #include "ftmac100.h" |
| 29 | |
| 30 | #define ETH_ZLEN 60 |
| 31 | |
| 32 | struct ftmac100_data { |
| 33 | volatile struct ftmac100_txdes txdes[1]; |
| 34 | volatile struct ftmac100_rxdes rxdes[PKTBUFSRX]; |
| 35 | int rx_index; |
| 36 | }; |
| 37 | |
| 38 | /* |
| 39 | * Reset MAC |
| 40 | */ |
| 41 | static void ftmac100_reset (struct eth_device *dev) |
| 42 | { |
| 43 | struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase; |
| 44 | |
| 45 | debug ("%s()\n", __func__); |
| 46 | |
| 47 | writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr); |
| 48 | |
| 49 | while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST) |
| 50 | ; |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Set MAC address |
| 55 | */ |
| 56 | static void ftmac100_set_mac (struct eth_device *dev, const unsigned char *mac) |
| 57 | { |
| 58 | struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase; |
| 59 | unsigned int maddr = mac[0] << 8 | mac[1]; |
| 60 | unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5]; |
| 61 | |
| 62 | debug ("%s(%x %x)\n", __func__, maddr, laddr); |
| 63 | |
| 64 | writel (maddr, &ftmac100->mac_madr); |
| 65 | writel (laddr, &ftmac100->mac_ladr); |
| 66 | } |
| 67 | |
| 68 | static void ftmac100_set_mac_from_env (struct eth_device *dev) |
| 69 | { |
| 70 | eth_getenv_enetaddr ("ethaddr", dev->enetaddr); |
| 71 | |
| 72 | ftmac100_set_mac (dev, dev->enetaddr); |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * disable transmitter, receiver |
| 77 | */ |
| 78 | static void ftmac100_halt (struct eth_device *dev) |
| 79 | { |
| 80 | struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase; |
| 81 | |
| 82 | debug ("%s()\n", __func__); |
| 83 | |
| 84 | writel (0, &ftmac100->maccr); |
| 85 | } |
| 86 | |
| 87 | static int ftmac100_init (struct eth_device *dev, bd_t *bd) |
| 88 | { |
| 89 | struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase; |
| 90 | struct ftmac100_data *priv = dev->priv; |
| 91 | volatile struct ftmac100_txdes *txdes = priv->txdes; |
| 92 | volatile struct ftmac100_rxdes *rxdes = priv->rxdes; |
| 93 | unsigned int maccr; |
| 94 | int i; |
| 95 | |
| 96 | debug ("%s()\n", __func__); |
| 97 | |
| 98 | ftmac100_reset (dev); |
| 99 | |
| 100 | /* set the ethernet address */ |
| 101 | |
| 102 | ftmac100_set_mac_from_env (dev); |
| 103 | |
| 104 | /* disable all interrupts */ |
| 105 | |
| 106 | writel (0, &ftmac100->imr); |
| 107 | |
| 108 | /* initialize descriptors */ |
| 109 | |
| 110 | priv->rx_index = 0; |
| 111 | |
| 112 | txdes[0].txdes1 = FTMAC100_TXDES1_EDOTR; |
| 113 | rxdes[PKTBUFSRX - 1].rxdes1 = FTMAC100_RXDES1_EDORR; |
| 114 | |
| 115 | for (i = 0; i < PKTBUFSRX; i++) { |
| 116 | /* RXBUF_BADR */ |
| 117 | rxdes[i].rxdes2 = (unsigned int)NetRxPackets[i]; |
| 118 | rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN); |
| 119 | rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN; |
| 120 | } |
| 121 | |
| 122 | /* transmit ring */ |
| 123 | |
| 124 | writel ((unsigned int)txdes, &ftmac100->txr_badr); |
| 125 | |
| 126 | /* receive ring */ |
| 127 | |
| 128 | writel ((unsigned int)rxdes, &ftmac100->rxr_badr); |
| 129 | |
| 130 | /* poll receive descriptor automatically */ |
| 131 | |
| 132 | writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc); |
| 133 | |
| 134 | /* enable transmitter, receiver */ |
| 135 | |
| 136 | maccr = FTMAC100_MACCR_XMT_EN | |
| 137 | FTMAC100_MACCR_RCV_EN | |
| 138 | FTMAC100_MACCR_XDMA_EN | |
| 139 | FTMAC100_MACCR_RDMA_EN | |
| 140 | FTMAC100_MACCR_CRC_APD | |
| 141 | FTMAC100_MACCR_ENRX_IN_HALFTX | |
| 142 | FTMAC100_MACCR_RX_RUNT | |
| 143 | FTMAC100_MACCR_RX_BROADPKT; |
| 144 | |
| 145 | writel (maccr, &ftmac100->maccr); |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * Get a data block via Ethernet |
| 152 | */ |
| 153 | static int ftmac100_recv (struct eth_device *dev) |
| 154 | { |
| 155 | struct ftmac100_data *priv = dev->priv; |
| 156 | volatile struct ftmac100_rxdes *curr_des; |
| 157 | unsigned short rxlen; |
| 158 | |
| 159 | curr_des = &priv->rxdes[priv->rx_index]; |
| 160 | |
| 161 | if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN) |
| 162 | return -1; |
| 163 | |
| 164 | if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR | |
| 165 | FTMAC100_RXDES0_CRC_ERR | |
| 166 | FTMAC100_RXDES0_FTL | |
| 167 | FTMAC100_RXDES0_RUNT | |
| 168 | FTMAC100_RXDES0_RX_ODD_NB)) { |
| 169 | return -1; |
| 170 | } |
| 171 | |
| 172 | rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0); |
| 173 | |
| 174 | debug ("%s(): RX buffer %d, %x received\n", |
| 175 | __func__, priv->rx_index, rxlen); |
| 176 | |
| 177 | /* pass the packet up to the protocol layers. */ |
| 178 | |
| 179 | NetReceive ((void *)curr_des->rxdes2, rxlen); |
| 180 | |
| 181 | /* release buffer to DMA */ |
| 182 | |
| 183 | curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN; |
| 184 | |
| 185 | priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX; |
| 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Send a data block via Ethernet |
| 192 | */ |
| 193 | static int |
| 194 | ftmac100_send (struct eth_device *dev, volatile void *packet, int length) |
| 195 | { |
| 196 | struct ftmac100 *ftmac100 = (struct ftmac100 *)dev->iobase; |
| 197 | struct ftmac100_data *priv = dev->priv; |
| 198 | volatile struct ftmac100_txdes *curr_des = priv->txdes; |
| 199 | int tmo; |
| 200 | |
| 201 | if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) { |
| 202 | debug ("%s(): no TX descriptor available\n", __func__); |
| 203 | return -1; |
| 204 | } |
| 205 | |
| 206 | debug ("%s(%x, %x)\n", __func__, (int)packet, length); |
| 207 | |
| 208 | length = (length < ETH_ZLEN) ? ETH_ZLEN : length; |
| 209 | |
| 210 | /* initiate a transmit sequence */ |
| 211 | |
| 212 | curr_des->txdes2 = (unsigned int)packet; /* TXBUF_BADR */ |
| 213 | |
| 214 | curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR; |
| 215 | curr_des->txdes1 |= FTMAC100_TXDES1_FTS | |
| 216 | FTMAC100_TXDES1_LTS | |
| 217 | FTMAC100_TXDES1_TXBUF_SIZE (length); |
| 218 | |
| 219 | curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN; |
| 220 | |
| 221 | /* start transmit */ |
| 222 | |
| 223 | writel (1, &ftmac100->txpd); |
| 224 | |
| 225 | /* wait for transfer to succeed */ |
| 226 | |
| 227 | tmo = get_timer (0) + 5 * CONFIG_SYS_HZ; |
| 228 | while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) { |
| 229 | if (get_timer (0) >= tmo) { |
| 230 | debug ("%s(): timed out\n", __func__); |
| 231 | return -1; |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | debug ("%s(): packet sent\n", __func__); |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | int ftmac100_initialize (bd_t *bd) |
| 241 | { |
| 242 | struct eth_device *dev; |
| 243 | struct ftmac100_data *priv; |
| 244 | |
| 245 | dev = malloc (sizeof *dev); |
| 246 | if (!dev) { |
| 247 | printf ("%s(): failed to allocate dev\n", __func__); |
| 248 | goto out; |
| 249 | } |
| 250 | |
| 251 | /* Transmit and receive descriptors should align to 16 bytes */ |
| 252 | |
| 253 | priv = memalign (16, sizeof (struct ftmac100_data)); |
| 254 | if (!priv) { |
| 255 | printf ("%s(): failed to allocate priv\n", __func__); |
| 256 | goto free_dev; |
| 257 | } |
| 258 | |
| 259 | memset (dev, 0, sizeof (*dev)); |
| 260 | memset (priv, 0, sizeof (*priv)); |
| 261 | |
| 262 | sprintf (dev->name, "FTMAC100"); |
| 263 | dev->iobase = CONFIG_FTMAC100_BASE; |
| 264 | dev->init = ftmac100_init; |
| 265 | dev->halt = ftmac100_halt; |
| 266 | dev->send = ftmac100_send; |
| 267 | dev->recv = ftmac100_recv; |
| 268 | dev->priv = priv; |
| 269 | |
| 270 | eth_register (dev); |
| 271 | |
| 272 | return 1; |
| 273 | |
| 274 | free_dev: |
| 275 | free (dev); |
| 276 | out: |
| 277 | return 0; |
| 278 | } |