2 * Altera 10/100/1000 triple speed ethernet mac driver
4 * Copyright (C) 2008 Altera Corporation.
5 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
14 #include <fdt_support.h>
18 #include <asm/cache.h>
19 #include <asm/dma-mapping.h>
21 #include "altera_tse.h"
23 DECLARE_GLOBAL_DATA_PTR;
25 static inline void alt_sgdma_construct_descriptor(
26 struct alt_sgdma_descriptor *desc,
27 struct alt_sgdma_descriptor *next,
33 int write_fixed_or_sop)
38 * Mark the "next" descriptor as "not" owned by hardware. This prevents
39 * The SGDMA controller from continuing to process the chain.
41 next->descriptor_control = next->descriptor_control &
42 ~ALT_SGDMA_DESCRIPTOR_CONTROL_OWNED_BY_HW_MSK;
44 memset(desc, 0, sizeof(struct alt_sgdma_descriptor));
45 desc->source = virt_to_phys(read_addr);
46 desc->destination = virt_to_phys(write_addr);
47 desc->next = virt_to_phys(next);
48 desc->bytes_to_transfer = length_or_eop;
51 * Set the descriptor control block as follows:
52 * - Set "owned by hardware" bit
53 * - Optionally set "generate EOP" bit
54 * - Optionally set the "read from fixed address" bit
55 * - Optionally set the "write to fixed address bit (which serves
56 * serves as a "generate SOP" control bit in memory-to-stream mode).
57 * - Set the 4-bit atlantic channel, if specified
59 * Note this step is performed after all other descriptor information
60 * has been filled out so that, if the controller already happens to be
61 * pointing at this descriptor, it will not run (via the "owned by
62 * hardware" bit) until all other descriptor has been set up.
64 val = ALT_SGDMA_DESCRIPTOR_CONTROL_OWNED_BY_HW_MSK;
66 val |= ALT_SGDMA_DESCRIPTOR_CONTROL_GENERATE_EOP_MSK;
68 val |= ALT_SGDMA_DESCRIPTOR_CONTROL_READ_FIXED_ADDRESS_MSK;
69 if (write_fixed_or_sop)
70 val |= ALT_SGDMA_DESCRIPTOR_CONTROL_WRITE_FIXED_ADDRESS_MSK;
71 desc->descriptor_control = val;
74 static int alt_sgdma_wait_transfer(struct alt_sgdma_registers *regs)
79 /* Wait for the descriptor (chain) to complete */
82 status = readl(®s->status);
83 if (!(status & ALT_SGDMA_STATUS_BUSY_MSK))
85 if (get_timer(ctime) > ALT_TSE_SGDMA_BUSY_TIMEOUT) {
87 debug("sgdma timeout\n");
93 writel(0, ®s->control);
95 writel(0xff, ®s->status);
100 static int alt_sgdma_start_transfer(struct alt_sgdma_registers *regs,
101 struct alt_sgdma_descriptor *desc)
105 /* Point the controller at the descriptor */
106 writel(virt_to_phys(desc), ®s->next_descriptor_pointer);
109 * Set up SGDMA controller to:
110 * - Disable interrupt generation
111 * - Run once a valid descriptor is written to controller
112 * - Stop on an error with any particular descriptor
114 val = ALT_SGDMA_CONTROL_RUN_MSK | ALT_SGDMA_CONTROL_STOP_DMA_ER_MSK;
115 writel(val, ®s->control);
120 static void tse_adjust_link(struct altera_tse_priv *priv,
121 struct phy_device *phydev)
123 struct alt_tse_mac *mac_dev = priv->mac_dev;
127 debug("%s: No link.\n", phydev->dev->name);
131 refvar = readl(&mac_dev->command_config);
134 refvar |= ALTERA_TSE_CMD_HD_ENA_MSK;
136 refvar &= ~ALTERA_TSE_CMD_HD_ENA_MSK;
138 switch (phydev->speed) {
140 refvar |= ALTERA_TSE_CMD_ETH_SPEED_MSK;
141 refvar &= ~ALTERA_TSE_CMD_ENA_10_MSK;
144 refvar &= ~ALTERA_TSE_CMD_ETH_SPEED_MSK;
145 refvar &= ~ALTERA_TSE_CMD_ENA_10_MSK;
148 refvar &= ~ALTERA_TSE_CMD_ETH_SPEED_MSK;
149 refvar |= ALTERA_TSE_CMD_ENA_10_MSK;
152 writel(refvar, &mac_dev->command_config);
155 static int altera_tse_send(struct udevice *dev, void *packet, int length)
157 struct altera_tse_priv *priv = dev_get_priv(dev);
158 struct alt_sgdma_descriptor *tx_desc = priv->tx_desc;
159 unsigned long tx_buf = (unsigned long)packet;
161 flush_dcache_range(tx_buf, tx_buf + length);
162 alt_sgdma_construct_descriptor(
165 packet, /* read addr */
166 NULL, /* write addr */
167 length, /* length or EOP ,will change for each tx */
170 1 /* write fixed or sop */
173 /* send the packet */
174 alt_sgdma_start_transfer(priv->sgdma_tx, tx_desc);
175 alt_sgdma_wait_transfer(priv->sgdma_tx);
176 debug("sent %d bytes\n", tx_desc->actual_bytes_transferred);
178 return tx_desc->actual_bytes_transferred;
181 static int altera_tse_recv(struct udevice *dev, int flags, uchar **packetp)
183 struct altera_tse_priv *priv = dev_get_priv(dev);
184 struct alt_sgdma_descriptor *rx_desc = priv->rx_desc;
187 if (rx_desc->descriptor_status &
188 ALT_SGDMA_DESCRIPTOR_STATUS_TERMINATED_BY_EOP_MSK) {
189 packet_length = rx_desc->actual_bytes_transferred;
190 debug("recv %d bytes\n", packet_length);
191 *packetp = priv->rx_buf;
193 return packet_length;
199 static int altera_tse_free_pkt(struct udevice *dev, uchar *packet,
202 struct altera_tse_priv *priv = dev_get_priv(dev);
203 struct alt_sgdma_descriptor *rx_desc = priv->rx_desc;
204 unsigned long rx_buf = (unsigned long)priv->rx_buf;
206 alt_sgdma_wait_transfer(priv->sgdma_rx);
207 invalidate_dcache_range(rx_buf, rx_buf + PKTSIZE_ALIGN);
208 alt_sgdma_construct_descriptor(
211 NULL, /* read addr */
212 priv->rx_buf, /* write addr */
213 0, /* length or EOP */
216 0 /* write fixed or sop */
219 /* setup the sgdma */
220 alt_sgdma_start_transfer(priv->sgdma_rx, rx_desc);
221 debug("recv setup\n");
226 static void altera_tse_stop(struct udevice *dev)
228 struct altera_tse_priv *priv = dev_get_priv(dev);
229 struct alt_tse_mac *mac_dev = priv->mac_dev;
230 struct alt_sgdma_registers *rx_sgdma = priv->sgdma_rx;
231 struct alt_sgdma_registers *tx_sgdma = priv->sgdma_tx;
232 struct alt_sgdma_descriptor *rx_desc = priv->rx_desc;
237 /* clear rx desc & wait for sgdma to complete */
238 rx_desc->descriptor_control = 0;
239 writel(0, &rx_sgdma->control);
240 ret = alt_sgdma_wait_transfer(rx_sgdma);
241 if (ret == -ETIMEDOUT)
242 writel(ALT_SGDMA_CONTROL_SOFTWARERESET_MSK,
245 writel(0, &tx_sgdma->control);
246 ret = alt_sgdma_wait_transfer(tx_sgdma);
247 if (ret == -ETIMEDOUT)
248 writel(ALT_SGDMA_CONTROL_SOFTWARERESET_MSK,
252 writel(ALTERA_TSE_CMD_SW_RESET_MSK, &mac_dev->command_config);
253 ctime = get_timer(0);
255 status = readl(&mac_dev->command_config);
256 if (!(status & ALTERA_TSE_CMD_SW_RESET_MSK))
258 if (get_timer(ctime) > ALT_TSE_SW_RESET_TIMEOUT) {
259 debug("Reset mac timeout\n");
265 static int tse_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
267 struct altera_tse_priv *priv = bus->priv;
268 struct alt_tse_mac *mac_dev = priv->mac_dev;
271 /* set mdio address */
272 writel(addr, &mac_dev->mdio_phy1_addr);
274 value = readl(&mac_dev->mdio_phy1[reg]);
276 return value & 0xffff;
279 static int tse_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
282 struct altera_tse_priv *priv = bus->priv;
283 struct alt_tse_mac *mac_dev = priv->mac_dev;
285 /* set mdio address */
286 writel(addr, &mac_dev->mdio_phy1_addr);
288 writel(val, &mac_dev->mdio_phy1[reg]);
293 static int tse_mdio_init(const char *name, struct altera_tse_priv *priv)
295 struct mii_dev *bus = mdio_alloc();
298 printf("Failed to allocate MDIO bus\n");
302 bus->read = tse_mdio_read;
303 bus->write = tse_mdio_write;
304 snprintf(bus->name, sizeof(bus->name), name);
306 bus->priv = (void *)priv;
308 return mdio_register(bus);
311 static int tse_phy_init(struct altera_tse_priv *priv, void *dev)
313 struct phy_device *phydev;
314 unsigned int mask = 0xffffffff;
317 mask = 1 << priv->phyaddr;
319 phydev = phy_find_by_mask(priv->bus, mask, priv->interface);
323 phy_connect_dev(phydev, dev);
325 phydev->supported &= PHY_GBIT_FEATURES;
326 phydev->advertising = phydev->supported;
328 priv->phydev = phydev;
334 static int altera_tse_write_hwaddr(struct udevice *dev)
336 struct altera_tse_priv *priv = dev_get_priv(dev);
337 struct alt_tse_mac *mac_dev = priv->mac_dev;
338 struct eth_pdata *pdata = dev_get_platdata(dev);
339 u8 *hwaddr = pdata->enetaddr;
342 mac_lo = (hwaddr[3] << 24) | (hwaddr[2] << 16) |
343 (hwaddr[1] << 8) | hwaddr[0];
344 mac_hi = (hwaddr[5] << 8) | hwaddr[4];
345 debug("Set MAC address to 0x%04x%08x\n", mac_hi, mac_lo);
347 writel(mac_lo, &mac_dev->mac_addr_0);
348 writel(mac_hi, &mac_dev->mac_addr_1);
349 writel(mac_lo, &mac_dev->supp_mac_addr_0_0);
350 writel(mac_hi, &mac_dev->supp_mac_addr_0_1);
351 writel(mac_lo, &mac_dev->supp_mac_addr_1_0);
352 writel(mac_hi, &mac_dev->supp_mac_addr_1_1);
353 writel(mac_lo, &mac_dev->supp_mac_addr_2_0);
354 writel(mac_hi, &mac_dev->supp_mac_addr_2_1);
355 writel(mac_lo, &mac_dev->supp_mac_addr_3_0);
356 writel(mac_hi, &mac_dev->supp_mac_addr_3_1);
361 static int altera_tse_start(struct udevice *dev)
363 struct altera_tse_priv *priv = dev_get_priv(dev);
364 struct alt_tse_mac *mac_dev = priv->mac_dev;
368 /* need to create sgdma */
369 debug("Configuring rx desc\n");
370 altera_tse_free_pkt(dev, priv->rx_buf, PKTSIZE_ALIGN);
372 debug("Configuring TSE Mac\n");
373 /* Initialize MAC registers */
374 writel(PKTSIZE_ALIGN, &mac_dev->max_frame_length);
375 writel(priv->rx_fifo_depth - 16, &mac_dev->rx_sel_empty_threshold);
376 writel(0, &mac_dev->rx_sel_full_threshold);
377 writel(priv->tx_fifo_depth - 16, &mac_dev->tx_sel_empty_threshold);
378 writel(0, &mac_dev->tx_sel_full_threshold);
379 writel(8, &mac_dev->rx_almost_empty_threshold);
380 writel(8, &mac_dev->rx_almost_full_threshold);
381 writel(8, &mac_dev->tx_almost_empty_threshold);
382 writel(3, &mac_dev->tx_almost_full_threshold);
385 writel(0, &mac_dev->rx_cmd_stat);
386 writel(0, &mac_dev->tx_cmd_stat);
389 val = ALTERA_TSE_CMD_TX_ENA_MSK | ALTERA_TSE_CMD_RX_ENA_MSK;
390 writel(val, &mac_dev->command_config);
392 /* Start up the PHY */
393 ret = phy_startup(priv->phydev);
395 debug("Could not initialize PHY %s\n",
396 priv->phydev->dev->name);
400 tse_adjust_link(priv, priv->phydev);
402 if (!priv->phydev->link)
408 static int altera_tse_probe(struct udevice *dev)
410 struct eth_pdata *pdata = dev_get_platdata(dev);
411 struct altera_tse_priv *priv = dev_get_priv(dev);
412 void *blob = (void *)gd->fdt_blob;
413 int node = dev->of_offset;
414 const char *list, *end;
416 void *base, *desc_mem = NULL;
417 unsigned long addr, size;
418 int parent, addrc, sizec;
423 * decode regs. there are multiple reg tuples, and they need to
424 * match with reg-names.
426 parent = fdt_parent_offset(blob, node);
427 of_bus_default_count_cells(blob, parent, &addrc, &sizec);
428 list = fdt_getprop(blob, node, "reg-names", &len);
432 cell = fdt_getprop(blob, node, "reg", &len);
437 addr = fdt_translate_address((void *)blob,
439 size = fdt_addr_to_cpu(cell[idx + addrc]);
440 base = ioremap(addr, size);
442 if (strcmp(list, "control_port") == 0)
443 priv->mac_dev = base;
444 else if (strcmp(list, "rx_csr") == 0)
445 priv->sgdma_rx = base;
446 else if (strcmp(list, "tx_csr") == 0)
447 priv->sgdma_tx = base;
448 else if (strcmp(list, "s1") == 0)
450 idx += addrc + sizec;
453 /* decode fifo depth */
454 priv->rx_fifo_depth = fdtdec_get_int(blob, node,
456 priv->tx_fifo_depth = fdtdec_get_int(blob, node,
459 addr = fdtdec_get_int(blob, node,
461 addr = fdt_node_offset_by_phandle(blob, addr);
462 priv->phyaddr = fdtdec_get_int(blob, addr,
465 len = sizeof(struct alt_sgdma_descriptor) * 4;
467 desc_mem = dma_alloc_coherent(len, &addr);
471 memset(desc_mem, 0, len);
472 priv->tx_desc = desc_mem;
473 priv->rx_desc = priv->tx_desc + 2;
474 /* allocate recv packet buffer */
475 priv->rx_buf = malloc_cache_aligned(PKTSIZE_ALIGN);
479 /* stop controller */
480 debug("Reset TSE & SGDMAs\n");
481 altera_tse_stop(dev);
484 priv->interface = pdata->phy_interface;
485 tse_mdio_init(dev->name, priv);
486 priv->bus = miiphy_get_dev_by_name(dev->name);
488 ret = tse_phy_init(priv, dev);
493 static int altera_tse_ofdata_to_platdata(struct udevice *dev)
495 struct eth_pdata *pdata = dev_get_platdata(dev);
496 const char *phy_mode;
498 pdata->phy_interface = -1;
499 phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "phy-mode", NULL);
501 pdata->phy_interface = phy_get_interface_by_name(phy_mode);
502 if (pdata->phy_interface == -1) {
503 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
510 static const struct eth_ops altera_tse_ops = {
511 .start = altera_tse_start,
512 .send = altera_tse_send,
513 .recv = altera_tse_recv,
514 .free_pkt = altera_tse_free_pkt,
515 .stop = altera_tse_stop,
516 .write_hwaddr = altera_tse_write_hwaddr,
519 static const struct udevice_id altera_tse_ids[] = {
520 { .compatible = "altr,tse-1.0", },
524 U_BOOT_DRIVER(altera_tse) = {
525 .name = "altera_tse",
527 .of_match = altera_tse_ids,
528 .ops = &altera_tse_ops,
529 .ofdata_to_platdata = altera_tse_ofdata_to_platdata,
530 .platdata_auto_alloc_size = sizeof(struct eth_pdata),
531 .priv_auto_alloc_size = sizeof(struct altera_tse_priv),
532 .probe = altera_tse_probe,