1 /****************************************************************************
2 * Driver for Solarflare 802.3an compliant PHY
3 * Copyright 2007 Solarflare Communications Inc.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
10 #include <linux/delay.h>
11 #include <linux/seq_file.h>
17 #include "falcon_hwdefs.h"
21 /* We expect these MMDs to be in the package */
22 /* AN not here as mdio_check_mmds() requires STAT2 support */
23 #define TENXPRESS_REQUIRED_DEVS (MDIO_MMDREG_DEVS0_PMAPMD | \
24 MDIO_MMDREG_DEVS0_PCS | \
25 MDIO_MMDREG_DEVS0_PHYXS)
27 #define TENXPRESS_LOOPBACKS ((1 << LOOPBACK_PHYXS) | \
28 (1 << LOOPBACK_PCS) | \
29 (1 << LOOPBACK_PMAPMD) | \
30 (1 << LOOPBACK_NETWORK))
32 /* We complain if we fail to see the link partner as 10G capable this many
33 * times in a row (must be > 1 as sampling the autoneg. registers is racy)
35 #define MAX_BAD_LP_TRIES (5)
37 /* Extended control register */
38 #define PMA_PMD_XCONTROL_REG 0xc000
39 #define PMA_PMD_LNPGA_POWERDOWN_LBN 8
40 #define PMA_PMD_LNPGA_POWERDOWN_WIDTH 1
42 /* extended status register */
43 #define PMA_PMD_XSTATUS_REG 0xc001
44 #define PMA_PMD_XSTAT_FLP_LBN (12)
46 /* LED control register */
47 #define PMA_PMD_LED_CTRL_REG (0xc007)
48 #define PMA_PMA_LED_ACTIVITY_LBN (3)
50 /* LED function override register */
51 #define PMA_PMD_LED_OVERR_REG (0xc009)
52 /* Bit positions for different LEDs (there are more but not wired on SFE4001)*/
53 #define PMA_PMD_LED_LINK_LBN (0)
54 #define PMA_PMD_LED_SPEED_LBN (2)
55 #define PMA_PMD_LED_TX_LBN (4)
56 #define PMA_PMD_LED_RX_LBN (6)
57 /* Override settings */
58 #define PMA_PMD_LED_AUTO (0) /* H/W control */
59 #define PMA_PMD_LED_ON (1)
60 #define PMA_PMD_LED_OFF (2)
61 #define PMA_PMD_LED_FLASH (3)
62 /* All LEDs under hardware control */
63 #define PMA_PMD_LED_FULL_AUTO (0)
64 /* Green and Amber under hardware control, Red off */
65 #define PMA_PMD_LED_DEFAULT (PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN)
68 /* Self test (BIST) control register */
69 #define PMA_PMD_BIST_CTRL_REG (0xc014)
70 #define PMA_PMD_BIST_BER_LBN (2) /* Run BER test */
71 #define PMA_PMD_BIST_CONT_LBN (1) /* Run continuous BIST until cleared */
72 #define PMA_PMD_BIST_SINGLE_LBN (0) /* Run 1 BIST iteration (self clears) */
73 /* Self test status register */
74 #define PMA_PMD_BIST_STAT_REG (0xc015)
75 #define PMA_PMD_BIST_ENX_LBN (3)
76 #define PMA_PMD_BIST_PMA_LBN (2)
77 #define PMA_PMD_BIST_RXD_LBN (1)
78 #define PMA_PMD_BIST_AFE_LBN (0)
80 /* Special Software reset register */
81 #define PMA_PMD_EXT_CTRL_REG 49152
82 #define PMA_PMD_EXT_SSR_LBN 15
84 #define BIST_MAX_DELAY (1000)
85 #define BIST_POLL_DELAY (10)
87 /* Misc register defines */
88 #define PCS_CLOCK_CTRL_REG 0xd801
89 #define PLL312_RST_N_LBN 2
91 #define PCS_SOFT_RST2_REG 0xd806
92 #define SERDES_RST_N_LBN 13
93 #define XGXS_RST_N_LBN 12
95 #define PCS_TEST_SELECT_REG 0xd807 /* PRM 10.5.8 */
96 #define CLK312_EN_LBN 3
99 #define PHYXS_TEST1 (49162)
100 #define LOOPBACK_NEAR_LBN (8)
101 #define LOOPBACK_NEAR_WIDTH (1)
103 /* Boot status register */
104 #define PCS_BOOT_STATUS_REG (0xd000)
105 #define PCS_BOOT_FATAL_ERR_LBN (0)
106 #define PCS_BOOT_PROGRESS_LBN (1)
107 #define PCS_BOOT_PROGRESS_WIDTH (2)
108 #define PCS_BOOT_COMPLETE_LBN (3)
109 #define PCS_BOOT_MAX_DELAY (100)
110 #define PCS_BOOT_POLL_DELAY (10)
112 /* Time to wait between powering down the LNPGA and turning off the power
114 #define LNPGA_PDOWN_WAIT (HZ / 5)
116 static int crc_error_reset_threshold = 100;
117 module_param(crc_error_reset_threshold, int, 0644);
118 MODULE_PARM_DESC(crc_error_reset_threshold,
119 "Max number of CRC errors before XAUI reset");
121 struct tenxpress_phy_data {
122 enum efx_loopback_mode loopback_mode;
123 atomic_t bad_crc_count;
124 enum efx_phy_mode phy_mode;
128 void tenxpress_crc_err(struct efx_nic *efx)
130 struct tenxpress_phy_data *phy_data = efx->phy_data;
131 if (phy_data != NULL)
132 atomic_inc(&phy_data->bad_crc_count);
135 /* Check that the C166 has booted successfully */
136 static int tenxpress_phy_check(struct efx_nic *efx)
138 int phy_id = efx->mii.phy_id;
139 int count = PCS_BOOT_MAX_DELAY / PCS_BOOT_POLL_DELAY;
142 /* Wait for the boot to complete (or not) */
144 boot_stat = mdio_clause45_read(efx, phy_id,
146 PCS_BOOT_STATUS_REG);
147 if (boot_stat & (1 << PCS_BOOT_COMPLETE_LBN))
150 udelay(PCS_BOOT_POLL_DELAY);
154 EFX_ERR(efx, "%s: PHY boot timed out. Last status "
156 (boot_stat >> PCS_BOOT_PROGRESS_LBN) &
157 ((1 << PCS_BOOT_PROGRESS_WIDTH) - 1));
164 static void tenxpress_reset_xaui(struct efx_nic *efx);
166 static int tenxpress_init(struct efx_nic *efx)
170 /* Turn on the clock */
171 reg = (1 << CLK312_EN_LBN);
172 mdio_clause45_write(efx, efx->mii.phy_id,
173 MDIO_MMD_PCS, PCS_TEST_SELECT_REG, reg);
175 rc = tenxpress_phy_check(efx);
179 /* Set the LEDs up as: Green = Link, Amber = Link/Act, Red = Off */
180 reg = mdio_clause45_read(efx, efx->mii.phy_id,
181 MDIO_MMD_PMAPMD, PMA_PMD_LED_CTRL_REG);
182 reg |= (1 << PMA_PMA_LED_ACTIVITY_LBN);
183 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
184 PMA_PMD_LED_CTRL_REG, reg);
186 reg = PMA_PMD_LED_DEFAULT;
187 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
188 PMA_PMD_LED_OVERR_REG, reg);
193 static int tenxpress_phy_init(struct efx_nic *efx)
195 struct tenxpress_phy_data *phy_data;
198 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
201 efx->phy_data = phy_data;
202 phy_data->phy_mode = efx->phy_mode;
204 rc = mdio_clause45_wait_reset_mmds(efx,
205 TENXPRESS_REQUIRED_DEVS);
209 rc = mdio_clause45_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
213 rc = tenxpress_init(efx);
217 schedule_timeout_uninterruptible(HZ / 5); /* 200ms */
219 /* Let XGXS and SerDes out of reset and resets 10XPress */
220 falcon_reset_xaui(efx);
225 kfree(efx->phy_data);
226 efx->phy_data = NULL;
230 static int tenxpress_special_reset(struct efx_nic *efx)
234 EFX_TRACE(efx, "%s\n", __func__);
237 reg = mdio_clause45_read(efx, efx->mii.phy_id,
238 MDIO_MMD_PMAPMD, PMA_PMD_EXT_CTRL_REG);
239 reg |= (1 << PMA_PMD_EXT_SSR_LBN);
240 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
241 PMA_PMD_EXT_CTRL_REG, reg);
245 /* Wait for the blocks to come out of reset */
246 rc = mdio_clause45_wait_reset_mmds(efx,
247 TENXPRESS_REQUIRED_DEVS);
251 /* Try and reconfigure the device */
252 rc = tenxpress_init(efx);
259 static void tenxpress_set_bad_lp(struct efx_nic *efx, bool bad_lp)
261 struct tenxpress_phy_data *pd = efx->phy_data;
264 /* Nothing to do if all is well and was previously so. */
265 if (!(bad_lp || pd->bad_lp_tries))
268 reg = mdio_clause45_read(efx, efx->mii.phy_id,
269 MDIO_MMD_PMAPMD, PMA_PMD_LED_OVERR_REG);
274 pd->bad_lp_tries = 0;
276 if (pd->bad_lp_tries == MAX_BAD_LP_TRIES) {
277 pd->bad_lp_tries = 0; /* Restart count */
278 reg &= ~(PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN);
279 reg |= (PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN);
280 EFX_ERR(efx, "This NIC appears to be plugged into"
281 " a port that is not 10GBASE-T capable.\n"
282 " This PHY is 10GBASE-T ONLY, so no link can"
283 " be established.\n");
285 reg |= (PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN);
287 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
288 PMA_PMD_LED_OVERR_REG, reg);
291 /* Check link status and return a boolean OK value. If the link is NOT
292 * OK we have a quick rummage round to see if we appear to be plugged
293 * into a non-10GBT port and if so warn the user that they won't get
294 * link any time soon as we are 10GBT only, unless caller specified
295 * not to do this check (it isn't useful in loopback) */
296 static bool tenxpress_link_ok(struct efx_nic *efx, bool check_lp)
298 bool ok = mdio_clause45_links_ok(efx, TENXPRESS_REQUIRED_DEVS);
301 tenxpress_set_bad_lp(efx, false);
302 } else if (check_lp) {
303 /* Are we plugged into the wrong sort of link? */
305 int phy_id = efx->mii.phy_id;
306 int an_stat = mdio_clause45_read(efx, phy_id, MDIO_MMD_AN,
308 int xphy_stat = mdio_clause45_read(efx, phy_id,
310 PMA_PMD_XSTATUS_REG);
311 /* Are we plugged into anything that sends FLPs? If
312 * not we can't distinguish between not being plugged
313 * in and being plugged into a non-AN antique. The FLP
314 * bit has the advantage of not clearing when autoneg
316 if (!(xphy_stat & (1 << PMA_PMD_XSTAT_FLP_LBN))) {
317 tenxpress_set_bad_lp(efx, false);
321 /* If it can do 10GBT it must be XNP capable */
322 bad_lp = !(an_stat & (1 << MDIO_AN_STATUS_XNP_LBN));
323 if (!bad_lp && (an_stat & (1 << MDIO_AN_STATUS_PAGE_LBN))) {
324 bad_lp = !(mdio_clause45_read(efx, phy_id,
325 MDIO_MMD_AN, MDIO_AN_10GBT_STATUS) &
326 (1 << MDIO_AN_10GBT_STATUS_LP_10G_LBN));
328 tenxpress_set_bad_lp(efx, bad_lp);
333 static void tenxpress_phyxs_loopback(struct efx_nic *efx)
335 int phy_id = efx->mii.phy_id;
338 ctrl1 = ctrl2 = mdio_clause45_read(efx, phy_id, MDIO_MMD_PHYXS,
340 if (efx->loopback_mode == LOOPBACK_PHYXS)
341 ctrl2 |= (1 << LOOPBACK_NEAR_LBN);
343 ctrl2 &= ~(1 << LOOPBACK_NEAR_LBN);
345 mdio_clause45_write(efx, phy_id, MDIO_MMD_PHYXS,
349 static void tenxpress_phy_reconfigure(struct efx_nic *efx)
351 struct tenxpress_phy_data *phy_data = efx->phy_data;
352 bool loop_change = LOOPBACK_OUT_OF(phy_data, efx,
353 TENXPRESS_LOOPBACKS);
355 if (efx->phy_mode & PHY_MODE_SPECIAL) {
356 phy_data->phy_mode = efx->phy_mode;
360 /* When coming out of transmit disable, coming out of low power
361 * mode, or moving out of any PHY internal loopback mode,
362 * perform a special software reset */
363 if ((efx->phy_mode == PHY_MODE_NORMAL &&
364 phy_data->phy_mode != PHY_MODE_NORMAL) ||
366 tenxpress_special_reset(efx);
367 falcon_reset_xaui(efx);
370 mdio_clause45_transmit_disable(efx);
371 mdio_clause45_phy_reconfigure(efx);
372 tenxpress_phyxs_loopback(efx);
374 phy_data->loopback_mode = efx->loopback_mode;
375 phy_data->phy_mode = efx->phy_mode;
376 efx->link_up = tenxpress_link_ok(efx, false);
377 efx->link_options = GM_LPA_10000FULL;
380 static void tenxpress_phy_clear_interrupt(struct efx_nic *efx)
382 /* Nothing done here - LASI interrupts aren't reliable so poll */
386 /* Poll PHY for interrupt */
387 static int tenxpress_phy_check_hw(struct efx_nic *efx)
389 struct tenxpress_phy_data *phy_data = efx->phy_data;
392 link_ok = (phy_data->phy_mode == PHY_MODE_NORMAL &&
393 tenxpress_link_ok(efx, true));
395 if (link_ok != efx->link_up)
396 falcon_xmac_sim_phy_event(efx);
398 if (phy_data->phy_mode != PHY_MODE_NORMAL)
401 if (atomic_read(&phy_data->bad_crc_count) > crc_error_reset_threshold) {
402 EFX_ERR(efx, "Resetting XAUI due to too many CRC errors\n");
403 falcon_reset_xaui(efx);
404 atomic_set(&phy_data->bad_crc_count, 0);
410 static void tenxpress_phy_fini(struct efx_nic *efx)
414 /* Power down the LNPGA */
415 reg = (1 << PMA_PMD_LNPGA_POWERDOWN_LBN);
416 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
417 PMA_PMD_XCONTROL_REG, reg);
419 /* Waiting here ensures that the board fini, which can turn off the
420 * power to the PHY, won't get run until the LNPGA powerdown has been
421 * given long enough to complete. */
422 schedule_timeout_uninterruptible(LNPGA_PDOWN_WAIT); /* 200 ms */
424 kfree(efx->phy_data);
425 efx->phy_data = NULL;
429 /* Set the RX and TX LEDs and Link LED flashing. The other LEDs
430 * (which probably aren't wired anyway) are left in AUTO mode */
431 void tenxpress_phy_blink(struct efx_nic *efx, bool blink)
436 reg = (PMA_PMD_LED_FLASH << PMA_PMD_LED_TX_LBN) |
437 (PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN) |
438 (PMA_PMD_LED_FLASH << PMA_PMD_LED_LINK_LBN);
440 reg = PMA_PMD_LED_DEFAULT;
442 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
443 PMA_PMD_LED_OVERR_REG, reg);
446 static void tenxpress_reset_xaui(struct efx_nic *efx)
448 int phy = efx->mii.phy_id;
449 int clk_ctrl, test_select, soft_rst2;
451 /* Real work is done on clock_ctrl other resets are thought to be
452 * optional but make the reset more reliable
456 clk_ctrl = mdio_clause45_read(efx, phy, MDIO_MMD_PCS,
458 test_select = mdio_clause45_read(efx, phy, MDIO_MMD_PCS,
459 PCS_TEST_SELECT_REG);
460 soft_rst2 = mdio_clause45_read(efx, phy, MDIO_MMD_PCS,
464 test_select &= ~(1 << CLK312_EN_LBN);
465 mdio_clause45_write(efx, phy, MDIO_MMD_PCS,
466 PCS_TEST_SELECT_REG, test_select);
468 soft_rst2 &= ~((1 << XGXS_RST_N_LBN) | (1 << SERDES_RST_N_LBN));
469 mdio_clause45_write(efx, phy, MDIO_MMD_PCS,
470 PCS_SOFT_RST2_REG, soft_rst2);
472 clk_ctrl &= ~(1 << PLL312_RST_N_LBN);
473 mdio_clause45_write(efx, phy, MDIO_MMD_PCS,
474 PCS_CLOCK_CTRL_REG, clk_ctrl);
478 clk_ctrl |= (1 << PLL312_RST_N_LBN);
479 mdio_clause45_write(efx, phy, MDIO_MMD_PCS,
480 PCS_CLOCK_CTRL_REG, clk_ctrl);
483 soft_rst2 |= ((1 << XGXS_RST_N_LBN) | (1 << SERDES_RST_N_LBN));
484 mdio_clause45_write(efx, phy, MDIO_MMD_PCS,
485 PCS_SOFT_RST2_REG, soft_rst2);
488 test_select |= (1 << CLK312_EN_LBN);
489 mdio_clause45_write(efx, phy, MDIO_MMD_PCS,
490 PCS_TEST_SELECT_REG, test_select);
494 struct efx_phy_operations falcon_tenxpress_phy_ops = {
495 .init = tenxpress_phy_init,
496 .reconfigure = tenxpress_phy_reconfigure,
497 .check_hw = tenxpress_phy_check_hw,
498 .fini = tenxpress_phy_fini,
499 .clear_interrupt = tenxpress_phy_clear_interrupt,
500 .reset_xaui = tenxpress_reset_xaui,
501 .mmds = TENXPRESS_REQUIRED_DEVS,
502 .loopbacks = TENXPRESS_LOOPBACKS,