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b9b17deb TT |
1 | /* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License version 2 and | |
5 | * only version 2 as published by the Free Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | */ | |
12 | ||
13 | /* Qualcomm Technologies, Inc. EMAC Gigabit Ethernet Driver */ | |
14 | ||
15 | #include <linux/if_ether.h> | |
16 | #include <linux/if_vlan.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/of.h> | |
21 | #include <linux/of_net.h> | |
22 | #include <linux/of_device.h> | |
23 | #include <linux/phy.h> | |
24 | #include <linux/platform_device.h> | |
5f3d3807 | 25 | #include <linux/acpi.h> |
b9b17deb TT |
26 | #include "emac.h" |
27 | #include "emac-mac.h" | |
28 | #include "emac-phy.h" | |
29 | #include "emac-sgmii.h" | |
30 | ||
31 | #define EMAC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \ | |
32 | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) | |
33 | ||
34 | #define EMAC_RRD_SIZE 4 | |
35 | /* The RRD size if timestamping is enabled: */ | |
36 | #define EMAC_TS_RRD_SIZE 6 | |
37 | #define EMAC_TPD_SIZE 4 | |
38 | #define EMAC_RFD_SIZE 2 | |
39 | ||
40 | #define REG_MAC_RX_STATUS_BIN EMAC_RXMAC_STATC_REG0 | |
41 | #define REG_MAC_RX_STATUS_END EMAC_RXMAC_STATC_REG22 | |
42 | #define REG_MAC_TX_STATUS_BIN EMAC_TXMAC_STATC_REG0 | |
43 | #define REG_MAC_TX_STATUS_END EMAC_TXMAC_STATC_REG24 | |
44 | ||
45 | #define RXQ0_NUM_RFD_PREF_DEF 8 | |
46 | #define TXQ0_NUM_TPD_PREF_DEF 5 | |
47 | ||
48 | #define EMAC_PREAMBLE_DEF 7 | |
49 | ||
50 | #define DMAR_DLY_CNT_DEF 15 | |
51 | #define DMAW_DLY_CNT_DEF 4 | |
52 | ||
24609669 | 53 | #define IMR_NORMAL_MASK (ISR_ERROR | ISR_OVER | ISR_TX_PKT) |
b9b17deb TT |
54 | |
55 | #define ISR_TX_PKT (\ | |
56 | TX_PKT_INT |\ | |
57 | TX_PKT_INT1 |\ | |
58 | TX_PKT_INT2 |\ | |
59 | TX_PKT_INT3) | |
60 | ||
b9b17deb TT |
61 | #define ISR_OVER (\ |
62 | RFD0_UR_INT |\ | |
63 | RFD1_UR_INT |\ | |
64 | RFD2_UR_INT |\ | |
65 | RFD3_UR_INT |\ | |
66 | RFD4_UR_INT |\ | |
67 | RXF_OF_INT |\ | |
68 | TXF_UR_INT) | |
69 | ||
70 | #define ISR_ERROR (\ | |
71 | DMAR_TO_INT |\ | |
72 | DMAW_TO_INT |\ | |
73 | TXQ_TO_INT) | |
74 | ||
75 | /* in sync with enum emac_clk_id */ | |
76 | static const char * const emac_clk_name[] = { | |
77 | "axi_clk", "cfg_ahb_clk", "high_speed_clk", "mdio_clk", "tx_clk", | |
78 | "rx_clk", "sys_clk" | |
79 | }; | |
80 | ||
81 | void emac_reg_update32(void __iomem *addr, u32 mask, u32 val) | |
82 | { | |
83 | u32 data = readl(addr); | |
84 | ||
85 | writel(((data & ~mask) | val), addr); | |
86 | } | |
87 | ||
88 | /* reinitialize */ | |
89 | int emac_reinit_locked(struct emac_adapter *adpt) | |
90 | { | |
91 | int ret; | |
92 | ||
93 | mutex_lock(&adpt->reset_lock); | |
94 | ||
95 | emac_mac_down(adpt); | |
96 | emac_sgmii_reset(adpt); | |
97 | ret = emac_mac_up(adpt); | |
98 | ||
99 | mutex_unlock(&adpt->reset_lock); | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
104 | /* NAPI */ | |
105 | static int emac_napi_rtx(struct napi_struct *napi, int budget) | |
106 | { | |
107 | struct emac_rx_queue *rx_q = | |
108 | container_of(napi, struct emac_rx_queue, napi); | |
109 | struct emac_adapter *adpt = netdev_priv(rx_q->netdev); | |
110 | struct emac_irq *irq = rx_q->irq; | |
111 | int work_done = 0; | |
112 | ||
113 | emac_mac_rx_process(adpt, rx_q, &work_done, budget); | |
114 | ||
115 | if (work_done < budget) { | |
6ad20165 | 116 | napi_complete_done(napi, work_done); |
b9b17deb TT |
117 | |
118 | irq->mask |= rx_q->intr; | |
119 | writel(irq->mask, adpt->base + EMAC_INT_MASK); | |
120 | } | |
121 | ||
122 | return work_done; | |
123 | } | |
124 | ||
125 | /* Transmit the packet */ | |
126 | static int emac_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
127 | { | |
128 | struct emac_adapter *adpt = netdev_priv(netdev); | |
129 | ||
130 | return emac_mac_tx_buf_send(adpt, &adpt->tx_q, skb); | |
131 | } | |
132 | ||
133 | irqreturn_t emac_isr(int _irq, void *data) | |
134 | { | |
135 | struct emac_irq *irq = data; | |
136 | struct emac_adapter *adpt = | |
137 | container_of(irq, struct emac_adapter, irq); | |
138 | struct emac_rx_queue *rx_q = &adpt->rx_q; | |
139 | u32 isr, status; | |
140 | ||
141 | /* disable the interrupt */ | |
142 | writel(0, adpt->base + EMAC_INT_MASK); | |
143 | ||
144 | isr = readl_relaxed(adpt->base + EMAC_INT_STATUS); | |
145 | ||
146 | status = isr & irq->mask; | |
147 | if (status == 0) | |
148 | goto exit; | |
149 | ||
150 | if (status & ISR_ERROR) { | |
151 | netif_warn(adpt, intr, adpt->netdev, | |
152 | "warning: error irq status 0x%lx\n", | |
153 | status & ISR_ERROR); | |
154 | /* reset MAC */ | |
155 | schedule_work(&adpt->work_thread); | |
156 | } | |
157 | ||
158 | /* Schedule the napi for receive queue with interrupt | |
159 | * status bit set | |
160 | */ | |
161 | if (status & rx_q->intr) { | |
162 | if (napi_schedule_prep(&rx_q->napi)) { | |
163 | irq->mask &= ~rx_q->intr; | |
164 | __napi_schedule(&rx_q->napi); | |
165 | } | |
166 | } | |
167 | ||
168 | if (status & TX_PKT_INT) | |
169 | emac_mac_tx_process(adpt, &adpt->tx_q); | |
170 | ||
171 | if (status & ISR_OVER) | |
172 | net_warn_ratelimited("warning: TX/RX overflow\n"); | |
173 | ||
b9b17deb TT |
174 | exit: |
175 | /* enable the interrupt */ | |
176 | writel(irq->mask, adpt->base + EMAC_INT_MASK); | |
177 | ||
178 | return IRQ_HANDLED; | |
179 | } | |
180 | ||
181 | /* Configure VLAN tag strip/insert feature */ | |
182 | static int emac_set_features(struct net_device *netdev, | |
183 | netdev_features_t features) | |
184 | { | |
185 | netdev_features_t changed = features ^ netdev->features; | |
186 | struct emac_adapter *adpt = netdev_priv(netdev); | |
187 | ||
188 | /* We only need to reprogram the hardware if the VLAN tag features | |
189 | * have changed, and if it's already running. | |
190 | */ | |
191 | if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX))) | |
192 | return 0; | |
193 | ||
194 | if (!netif_running(netdev)) | |
195 | return 0; | |
196 | ||
197 | /* emac_mac_mode_config() uses netdev->features to configure the EMAC, | |
198 | * so make sure it's set first. | |
199 | */ | |
200 | netdev->features = features; | |
201 | ||
202 | return emac_reinit_locked(adpt); | |
203 | } | |
204 | ||
205 | /* Configure Multicast and Promiscuous modes */ | |
206 | static void emac_rx_mode_set(struct net_device *netdev) | |
207 | { | |
208 | struct emac_adapter *adpt = netdev_priv(netdev); | |
209 | struct netdev_hw_addr *ha; | |
210 | ||
211 | emac_mac_mode_config(adpt); | |
212 | ||
213 | /* update multicast address filtering */ | |
214 | emac_mac_multicast_addr_clear(adpt); | |
215 | netdev_for_each_mc_addr(ha, netdev) | |
216 | emac_mac_multicast_addr_set(adpt, ha->addr); | |
217 | } | |
218 | ||
219 | /* Change the Maximum Transfer Unit (MTU) */ | |
220 | static int emac_change_mtu(struct net_device *netdev, int new_mtu) | |
221 | { | |
b9b17deb TT |
222 | struct emac_adapter *adpt = netdev_priv(netdev); |
223 | ||
b9b17deb TT |
224 | netif_info(adpt, hw, adpt->netdev, |
225 | "changing MTU from %d to %d\n", netdev->mtu, | |
226 | new_mtu); | |
227 | netdev->mtu = new_mtu; | |
228 | ||
229 | if (netif_running(netdev)) | |
230 | return emac_reinit_locked(adpt); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | /* Called when the network interface is made active */ | |
236 | static int emac_open(struct net_device *netdev) | |
237 | { | |
238 | struct emac_adapter *adpt = netdev_priv(netdev); | |
4404323c | 239 | struct emac_irq *irq = &adpt->irq; |
b9b17deb TT |
240 | int ret; |
241 | ||
4404323c TT |
242 | ret = request_irq(irq->irq, emac_isr, 0, "emac-core0", irq); |
243 | if (ret) { | |
244 | netdev_err(adpt->netdev, "could not request emac-core0 irq\n"); | |
245 | return ret; | |
246 | } | |
247 | ||
b9b17deb TT |
248 | /* allocate rx/tx dma buffer & descriptors */ |
249 | ret = emac_mac_rx_tx_rings_alloc_all(adpt); | |
250 | if (ret) { | |
251 | netdev_err(adpt->netdev, "error allocating rx/tx rings\n"); | |
4404323c | 252 | free_irq(irq->irq, irq); |
b9b17deb TT |
253 | return ret; |
254 | } | |
255 | ||
256 | ret = emac_mac_up(adpt); | |
257 | if (ret) { | |
258 | emac_mac_rx_tx_rings_free_all(adpt); | |
4404323c | 259 | free_irq(irq->irq, irq); |
b9b17deb TT |
260 | return ret; |
261 | } | |
262 | ||
fd0e97b8 TT |
263 | ret = adpt->phy.open(adpt); |
264 | if (ret) { | |
265 | emac_mac_down(adpt); | |
266 | emac_mac_rx_tx_rings_free_all(adpt); | |
267 | free_irq(irq->irq, irq); | |
268 | return ret; | |
269 | } | |
270 | ||
b9b17deb TT |
271 | return 0; |
272 | } | |
273 | ||
274 | /* Called when the network interface is disabled */ | |
275 | static int emac_close(struct net_device *netdev) | |
276 | { | |
277 | struct emac_adapter *adpt = netdev_priv(netdev); | |
278 | ||
279 | mutex_lock(&adpt->reset_lock); | |
280 | ||
fd0e97b8 | 281 | adpt->phy.close(adpt); |
b9b17deb TT |
282 | emac_mac_down(adpt); |
283 | emac_mac_rx_tx_rings_free_all(adpt); | |
284 | ||
4404323c TT |
285 | free_irq(adpt->irq.irq, &adpt->irq); |
286 | ||
b9b17deb TT |
287 | mutex_unlock(&adpt->reset_lock); |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | /* Respond to a TX hang */ | |
293 | static void emac_tx_timeout(struct net_device *netdev) | |
294 | { | |
295 | struct emac_adapter *adpt = netdev_priv(netdev); | |
296 | ||
297 | schedule_work(&adpt->work_thread); | |
298 | } | |
299 | ||
300 | /* IOCTL support for the interface */ | |
301 | static int emac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
302 | { | |
303 | if (!netif_running(netdev)) | |
304 | return -EINVAL; | |
305 | ||
306 | if (!netdev->phydev) | |
307 | return -ENODEV; | |
308 | ||
309 | return phy_mii_ioctl(netdev->phydev, ifr, cmd); | |
310 | } | |
311 | ||
79f664ed TT |
312 | /** |
313 | * emac_update_hw_stats - read the EMAC stat registers | |
314 | * | |
315 | * Reads the stats registers and write the values to adpt->stats. | |
316 | * | |
317 | * adpt->stats.lock must be held while calling this function, | |
318 | * and while reading from adpt->stats. | |
319 | */ | |
320 | void emac_update_hw_stats(struct emac_adapter *adpt) | |
b9b17deb | 321 | { |
b9b17deb TT |
322 | struct emac_stats *stats = &adpt->stats; |
323 | u64 *stats_itr = &adpt->stats.rx_ok; | |
79f664ed TT |
324 | void __iomem *base = adpt->base; |
325 | unsigned int addr; | |
b9b17deb | 326 | |
79f664ed | 327 | addr = REG_MAC_RX_STATUS_BIN; |
b9b17deb | 328 | while (addr <= REG_MAC_RX_STATUS_END) { |
79f664ed | 329 | *stats_itr += readl_relaxed(base + addr); |
b9b17deb TT |
330 | stats_itr++; |
331 | addr += sizeof(u32); | |
332 | } | |
333 | ||
334 | /* additional rx status */ | |
79f664ed TT |
335 | stats->rx_crc_align += readl_relaxed(base + EMAC_RXMAC_STATC_REG23); |
336 | stats->rx_jabbers += readl_relaxed(base + EMAC_RXMAC_STATC_REG24); | |
b9b17deb TT |
337 | |
338 | /* update tx status */ | |
339 | addr = REG_MAC_TX_STATUS_BIN; | |
79f664ed | 340 | stats_itr = &stats->tx_ok; |
b9b17deb TT |
341 | |
342 | while (addr <= REG_MAC_TX_STATUS_END) { | |
79f664ed TT |
343 | *stats_itr += readl_relaxed(base + addr); |
344 | stats_itr++; | |
b9b17deb TT |
345 | addr += sizeof(u32); |
346 | } | |
347 | ||
348 | /* additional tx status */ | |
79f664ed TT |
349 | stats->tx_col += readl_relaxed(base + EMAC_TXMAC_STATC_REG25); |
350 | } | |
351 | ||
352 | /* Provide network statistics info for the interface */ | |
353 | static void emac_get_stats64(struct net_device *netdev, | |
354 | struct rtnl_link_stats64 *net_stats) | |
355 | { | |
356 | struct emac_adapter *adpt = netdev_priv(netdev); | |
357 | struct emac_stats *stats = &adpt->stats; | |
358 | ||
359 | spin_lock(&stats->lock); | |
360 | ||
361 | emac_update_hw_stats(adpt); | |
b9b17deb TT |
362 | |
363 | /* return parsed statistics */ | |
364 | net_stats->rx_packets = stats->rx_ok; | |
365 | net_stats->tx_packets = stats->tx_ok; | |
366 | net_stats->rx_bytes = stats->rx_byte_cnt; | |
367 | net_stats->tx_bytes = stats->tx_byte_cnt; | |
368 | net_stats->multicast = stats->rx_mcast; | |
369 | net_stats->collisions = stats->tx_1_col + stats->tx_2_col * 2 + | |
370 | stats->tx_late_col + stats->tx_abort_col; | |
371 | ||
372 | net_stats->rx_errors = stats->rx_frag + stats->rx_fcs_err + | |
373 | stats->rx_len_err + stats->rx_sz_ov + | |
374 | stats->rx_align_err; | |
375 | net_stats->rx_fifo_errors = stats->rx_rxf_ov; | |
376 | net_stats->rx_length_errors = stats->rx_len_err; | |
377 | net_stats->rx_crc_errors = stats->rx_fcs_err; | |
378 | net_stats->rx_frame_errors = stats->rx_align_err; | |
379 | net_stats->rx_over_errors = stats->rx_rxf_ov; | |
380 | net_stats->rx_missed_errors = stats->rx_rxf_ov; | |
381 | ||
382 | net_stats->tx_errors = stats->tx_late_col + stats->tx_abort_col + | |
383 | stats->tx_underrun + stats->tx_trunc; | |
384 | net_stats->tx_fifo_errors = stats->tx_underrun; | |
385 | net_stats->tx_aborted_errors = stats->tx_abort_col; | |
386 | net_stats->tx_window_errors = stats->tx_late_col; | |
387 | ||
388 | spin_unlock(&stats->lock); | |
b9b17deb TT |
389 | } |
390 | ||
391 | static const struct net_device_ops emac_netdev_ops = { | |
392 | .ndo_open = emac_open, | |
393 | .ndo_stop = emac_close, | |
394 | .ndo_validate_addr = eth_validate_addr, | |
395 | .ndo_start_xmit = emac_start_xmit, | |
396 | .ndo_set_mac_address = eth_mac_addr, | |
397 | .ndo_change_mtu = emac_change_mtu, | |
398 | .ndo_do_ioctl = emac_ioctl, | |
399 | .ndo_tx_timeout = emac_tx_timeout, | |
400 | .ndo_get_stats64 = emac_get_stats64, | |
401 | .ndo_set_features = emac_set_features, | |
402 | .ndo_set_rx_mode = emac_rx_mode_set, | |
403 | }; | |
404 | ||
405 | /* Watchdog task routine, called to reinitialize the EMAC */ | |
406 | static void emac_work_thread(struct work_struct *work) | |
407 | { | |
408 | struct emac_adapter *adpt = | |
409 | container_of(work, struct emac_adapter, work_thread); | |
410 | ||
411 | emac_reinit_locked(adpt); | |
412 | } | |
413 | ||
414 | /* Initialize various data structures */ | |
415 | static void emac_init_adapter(struct emac_adapter *adpt) | |
416 | { | |
417 | u32 reg; | |
418 | ||
b44700e9 TT |
419 | adpt->rrd_size = EMAC_RRD_SIZE; |
420 | adpt->tpd_size = EMAC_TPD_SIZE; | |
421 | adpt->rfd_size = EMAC_RFD_SIZE; | |
422 | ||
b9b17deb TT |
423 | /* descriptors */ |
424 | adpt->tx_desc_cnt = EMAC_DEF_TX_DESCS; | |
425 | adpt->rx_desc_cnt = EMAC_DEF_RX_DESCS; | |
426 | ||
427 | /* dma */ | |
428 | adpt->dma_order = emac_dma_ord_out; | |
429 | adpt->dmar_block = emac_dma_req_4096; | |
430 | adpt->dmaw_block = emac_dma_req_128; | |
431 | adpt->dmar_dly_cnt = DMAR_DLY_CNT_DEF; | |
432 | adpt->dmaw_dly_cnt = DMAW_DLY_CNT_DEF; | |
433 | adpt->tpd_burst = TXQ0_NUM_TPD_PREF_DEF; | |
434 | adpt->rfd_burst = RXQ0_NUM_RFD_PREF_DEF; | |
435 | ||
436 | /* irq moderator */ | |
437 | reg = ((EMAC_DEF_RX_IRQ_MOD >> 1) << IRQ_MODERATOR2_INIT_SHFT) | | |
438 | ((EMAC_DEF_TX_IRQ_MOD >> 1) << IRQ_MODERATOR_INIT_SHFT); | |
439 | adpt->irq_mod = reg; | |
440 | ||
441 | /* others */ | |
442 | adpt->preamble = EMAC_PREAMBLE_DEF; | |
b44700e9 TT |
443 | |
444 | /* default to automatic flow control */ | |
445 | adpt->automatic = true; | |
4a7a3860 TT |
446 | |
447 | /* Disable single-pause-frame mode by default */ | |
448 | adpt->single_pause_mode = false; | |
b9b17deb TT |
449 | } |
450 | ||
451 | /* Get the clock */ | |
452 | static int emac_clks_get(struct platform_device *pdev, | |
453 | struct emac_adapter *adpt) | |
454 | { | |
455 | unsigned int i; | |
456 | ||
457 | for (i = 0; i < EMAC_CLK_CNT; i++) { | |
458 | struct clk *clk = devm_clk_get(&pdev->dev, emac_clk_name[i]); | |
459 | ||
460 | if (IS_ERR(clk)) { | |
461 | dev_err(&pdev->dev, | |
462 | "could not claim clock %s (error=%li)\n", | |
463 | emac_clk_name[i], PTR_ERR(clk)); | |
464 | ||
465 | return PTR_ERR(clk); | |
466 | } | |
467 | ||
468 | adpt->clk[i] = clk; | |
469 | } | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | /* Initialize clocks */ | |
475 | static int emac_clks_phase1_init(struct platform_device *pdev, | |
476 | struct emac_adapter *adpt) | |
477 | { | |
478 | int ret; | |
479 | ||
026acd5f TT |
480 | /* On ACPI platforms, clocks are controlled by firmware and/or |
481 | * ACPI, not by drivers. | |
482 | */ | |
483 | if (has_acpi_companion(&pdev->dev)) | |
484 | return 0; | |
485 | ||
b9b17deb TT |
486 | ret = emac_clks_get(pdev, adpt); |
487 | if (ret) | |
488 | return ret; | |
489 | ||
490 | ret = clk_prepare_enable(adpt->clk[EMAC_CLK_AXI]); | |
491 | if (ret) | |
492 | return ret; | |
493 | ||
494 | ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]); | |
495 | if (ret) | |
496 | return ret; | |
497 | ||
498 | ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000); | |
499 | if (ret) | |
500 | return ret; | |
501 | ||
502 | return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]); | |
503 | } | |
504 | ||
505 | /* Enable clocks; needs emac_clks_phase1_init to be called before */ | |
506 | static int emac_clks_phase2_init(struct platform_device *pdev, | |
507 | struct emac_adapter *adpt) | |
508 | { | |
509 | int ret; | |
510 | ||
026acd5f TT |
511 | if (has_acpi_companion(&pdev->dev)) |
512 | return 0; | |
513 | ||
b9b17deb TT |
514 | ret = clk_set_rate(adpt->clk[EMAC_CLK_TX], 125000000); |
515 | if (ret) | |
516 | return ret; | |
517 | ||
518 | ret = clk_prepare_enable(adpt->clk[EMAC_CLK_TX]); | |
519 | if (ret) | |
520 | return ret; | |
521 | ||
522 | ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 125000000); | |
523 | if (ret) | |
524 | return ret; | |
525 | ||
526 | ret = clk_set_rate(adpt->clk[EMAC_CLK_MDIO], 25000000); | |
527 | if (ret) | |
528 | return ret; | |
529 | ||
530 | ret = clk_prepare_enable(adpt->clk[EMAC_CLK_MDIO]); | |
531 | if (ret) | |
532 | return ret; | |
533 | ||
534 | ret = clk_prepare_enable(adpt->clk[EMAC_CLK_RX]); | |
535 | if (ret) | |
536 | return ret; | |
537 | ||
538 | return clk_prepare_enable(adpt->clk[EMAC_CLK_SYS]); | |
539 | } | |
540 | ||
541 | static void emac_clks_teardown(struct emac_adapter *adpt) | |
542 | { | |
543 | ||
544 | unsigned int i; | |
545 | ||
546 | for (i = 0; i < EMAC_CLK_CNT; i++) | |
547 | clk_disable_unprepare(adpt->clk[i]); | |
548 | } | |
549 | ||
550 | /* Get the resources */ | |
551 | static int emac_probe_resources(struct platform_device *pdev, | |
552 | struct emac_adapter *adpt) | |
553 | { | |
b9b17deb TT |
554 | struct net_device *netdev = adpt->netdev; |
555 | struct resource *res; | |
0de709ac | 556 | char maddr[ETH_ALEN]; |
b9b17deb TT |
557 | int ret = 0; |
558 | ||
559 | /* get mac address */ | |
0de709ac | 560 | if (device_get_mac_address(&pdev->dev, maddr, ETH_ALEN)) |
b9b17deb | 561 | ether_addr_copy(netdev->dev_addr, maddr); |
0de709ac TT |
562 | else |
563 | eth_hw_addr_random(netdev); | |
b9b17deb TT |
564 | |
565 | /* Core 0 interrupt */ | |
566 | ret = platform_get_irq(pdev, 0); | |
567 | if (ret < 0) { | |
568 | dev_err(&pdev->dev, | |
569 | "error: missing core0 irq resource (error=%i)\n", ret); | |
570 | return ret; | |
571 | } | |
572 | adpt->irq.irq = ret; | |
573 | ||
574 | /* base register address */ | |
575 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
576 | adpt->base = devm_ioremap_resource(&pdev->dev, res); | |
577 | if (IS_ERR(adpt->base)) | |
578 | return PTR_ERR(adpt->base); | |
579 | ||
580 | /* CSR register address */ | |
581 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
582 | adpt->csr = devm_ioremap_resource(&pdev->dev, res); | |
583 | if (IS_ERR(adpt->csr)) | |
584 | return PTR_ERR(adpt->csr); | |
585 | ||
586 | netdev->base_addr = (unsigned long)adpt->base; | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | static const struct of_device_id emac_dt_match[] = { | |
592 | { | |
593 | .compatible = "qcom,fsm9900-emac", | |
594 | }, | |
595 | {} | |
596 | }; | |
70972685 | 597 | MODULE_DEVICE_TABLE(of, emac_dt_match); |
b9b17deb | 598 | |
5f3d3807 TT |
599 | #if IS_ENABLED(CONFIG_ACPI) |
600 | static const struct acpi_device_id emac_acpi_match[] = { | |
601 | { | |
602 | .id = "QCOM8070", | |
603 | }, | |
604 | {} | |
605 | }; | |
606 | MODULE_DEVICE_TABLE(acpi, emac_acpi_match); | |
607 | #endif | |
608 | ||
b9b17deb TT |
609 | static int emac_probe(struct platform_device *pdev) |
610 | { | |
611 | struct net_device *netdev; | |
612 | struct emac_adapter *adpt; | |
41c1093f | 613 | struct emac_sgmii *phy; |
b9b17deb TT |
614 | u16 devid, revid; |
615 | u32 reg; | |
616 | int ret; | |
617 | ||
618 | /* The EMAC itself is capable of 64-bit DMA, so try that first. */ | |
619 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); | |
620 | if (ret) { | |
621 | /* Some platforms may restrict the EMAC's address bus to less | |
622 | * then the size of DDR. In this case, we need to try a | |
623 | * smaller mask. We could try every possible smaller mask, | |
624 | * but that's overkill. Instead, just fall to 32-bit, which | |
625 | * should always work. | |
626 | */ | |
627 | ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); | |
628 | if (ret) { | |
629 | dev_err(&pdev->dev, "could not set DMA mask\n"); | |
630 | return ret; | |
631 | } | |
632 | } | |
633 | ||
634 | netdev = alloc_etherdev(sizeof(struct emac_adapter)); | |
635 | if (!netdev) | |
636 | return -ENOMEM; | |
637 | ||
638 | dev_set_drvdata(&pdev->dev, netdev); | |
639 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
79f664ed | 640 | emac_set_ethtool_ops(netdev); |
b9b17deb TT |
641 | |
642 | adpt = netdev_priv(netdev); | |
643 | adpt->netdev = netdev; | |
644 | adpt->msg_enable = EMAC_MSG_DEFAULT; | |
645 | ||
646 | phy = &adpt->phy; | |
fd0e97b8 | 647 | atomic_set(&phy->decode_error_count, 0); |
b9b17deb TT |
648 | |
649 | mutex_init(&adpt->reset_lock); | |
650 | spin_lock_init(&adpt->stats.lock); | |
651 | ||
652 | adpt->irq.mask = RX_PKT_INT0 | IMR_NORMAL_MASK; | |
653 | ||
654 | ret = emac_probe_resources(pdev, adpt); | |
655 | if (ret) | |
656 | goto err_undo_netdev; | |
657 | ||
658 | /* initialize clocks */ | |
659 | ret = emac_clks_phase1_init(pdev, adpt); | |
660 | if (ret) { | |
661 | dev_err(&pdev->dev, "could not initialize clocks\n"); | |
662 | goto err_undo_netdev; | |
663 | } | |
664 | ||
665 | netdev->watchdog_timeo = EMAC_WATCHDOG_TIME; | |
666 | netdev->irq = adpt->irq.irq; | |
667 | ||
b9b17deb TT |
668 | netdev->netdev_ops = &emac_netdev_ops; |
669 | ||
670 | emac_init_adapter(adpt); | |
671 | ||
672 | /* init external phy */ | |
673 | ret = emac_phy_config(pdev, adpt); | |
674 | if (ret) | |
675 | goto err_undo_clocks; | |
676 | ||
677 | /* init internal sgmii phy */ | |
678 | ret = emac_sgmii_config(pdev, adpt); | |
679 | if (ret) | |
680 | goto err_undo_mdiobus; | |
681 | ||
682 | /* enable clocks */ | |
683 | ret = emac_clks_phase2_init(pdev, adpt); | |
684 | if (ret) { | |
685 | dev_err(&pdev->dev, "could not initialize clocks\n"); | |
686 | goto err_undo_mdiobus; | |
687 | } | |
688 | ||
b9b17deb TT |
689 | /* set hw features */ |
690 | netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | | |
691 | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX | | |
692 | NETIF_F_HW_VLAN_CTAG_TX; | |
693 | netdev->hw_features = netdev->features; | |
694 | ||
695 | netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM | | |
696 | NETIF_F_TSO | NETIF_F_TSO6; | |
697 | ||
d894be57 JW |
698 | /* MTU range: 46 - 9194 */ |
699 | netdev->min_mtu = EMAC_MIN_ETH_FRAME_SIZE - | |
700 | (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); | |
701 | netdev->max_mtu = EMAC_MAX_ETH_FRAME_SIZE - | |
702 | (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); | |
703 | ||
b9b17deb TT |
704 | INIT_WORK(&adpt->work_thread, emac_work_thread); |
705 | ||
706 | /* Initialize queues */ | |
707 | emac_mac_rx_tx_ring_init_all(pdev, adpt); | |
708 | ||
709 | netif_napi_add(netdev, &adpt->rx_q.napi, emac_napi_rtx, | |
710 | NAPI_POLL_WEIGHT); | |
711 | ||
712 | ret = register_netdev(netdev); | |
713 | if (ret) { | |
714 | dev_err(&pdev->dev, "could not register net device\n"); | |
715 | goto err_undo_napi; | |
716 | } | |
717 | ||
718 | reg = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL); | |
719 | devid = (reg & DEV_ID_NUM_BMSK) >> DEV_ID_NUM_SHFT; | |
720 | revid = (reg & DEV_REV_NUM_BMSK) >> DEV_REV_NUM_SHFT; | |
721 | reg = readl_relaxed(adpt->base + EMAC_CORE_HW_VERSION); | |
722 | ||
723 | netif_info(adpt, probe, netdev, | |
724 | "hardware id %d.%d, hardware version %d.%d.%d\n", | |
725 | devid, revid, | |
726 | (reg & MAJOR_BMSK) >> MAJOR_SHFT, | |
727 | (reg & MINOR_BMSK) >> MINOR_SHFT, | |
728 | (reg & STEP_BMSK) >> STEP_SHFT); | |
729 | ||
730 | return 0; | |
731 | ||
732 | err_undo_napi: | |
733 | netif_napi_del(&adpt->rx_q.napi); | |
734 | err_undo_mdiobus: | |
994c5483 | 735 | put_device(&adpt->phydev->mdio.dev); |
b9b17deb TT |
736 | mdiobus_unregister(adpt->mii_bus); |
737 | err_undo_clocks: | |
738 | emac_clks_teardown(adpt); | |
739 | err_undo_netdev: | |
740 | free_netdev(netdev); | |
741 | ||
742 | return ret; | |
743 | } | |
744 | ||
745 | static int emac_remove(struct platform_device *pdev) | |
746 | { | |
747 | struct net_device *netdev = dev_get_drvdata(&pdev->dev); | |
748 | struct emac_adapter *adpt = netdev_priv(netdev); | |
749 | ||
750 | unregister_netdev(netdev); | |
751 | netif_napi_del(&adpt->rx_q.napi); | |
752 | ||
753 | emac_clks_teardown(adpt); | |
754 | ||
994c5483 | 755 | put_device(&adpt->phydev->mdio.dev); |
b9b17deb TT |
756 | mdiobus_unregister(adpt->mii_bus); |
757 | free_netdev(netdev); | |
b9b17deb | 758 | |
54e19bc7 TT |
759 | if (adpt->phy.digital) |
760 | iounmap(adpt->phy.digital); | |
761 | iounmap(adpt->phy.base); | |
762 | ||
b9b17deb TT |
763 | return 0; |
764 | } | |
765 | ||
03eb3eb4 TT |
766 | static void emac_shutdown(struct platform_device *pdev) |
767 | { | |
768 | struct net_device *netdev = dev_get_drvdata(&pdev->dev); | |
769 | struct emac_adapter *adpt = netdev_priv(netdev); | |
770 | struct emac_sgmii *sgmii = &adpt->phy; | |
771 | ||
c98b0537 TT |
772 | if (netdev->flags & IFF_UP) { |
773 | /* Closing the SGMII turns off its interrupts */ | |
774 | sgmii->close(adpt); | |
03eb3eb4 | 775 | |
c98b0537 TT |
776 | /* Resetting the MAC turns off all DMA and its interrupts */ |
777 | emac_mac_reset(adpt); | |
778 | } | |
03eb3eb4 TT |
779 | } |
780 | ||
b9b17deb TT |
781 | static struct platform_driver emac_platform_driver = { |
782 | .probe = emac_probe, | |
783 | .remove = emac_remove, | |
784 | .driver = { | |
b9b17deb TT |
785 | .name = "qcom-emac", |
786 | .of_match_table = emac_dt_match, | |
5f3d3807 | 787 | .acpi_match_table = ACPI_PTR(emac_acpi_match), |
b9b17deb | 788 | }, |
03eb3eb4 | 789 | .shutdown = emac_shutdown, |
b9b17deb TT |
790 | }; |
791 | ||
792 | module_platform_driver(emac_platform_driver); | |
793 | ||
794 | MODULE_LICENSE("GPL v2"); | |
795 | MODULE_ALIAS("platform:qcom-emac"); |