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 /* Special Software reset register */
69 #define PMA_PMD_EXT_CTRL_REG 49152
70 #define PMA_PMD_EXT_SSR_LBN 15
72 /* Misc register defines */
73 #define PCS_CLOCK_CTRL_REG 0xd801
74 #define PLL312_RST_N_LBN 2
76 #define PCS_SOFT_RST2_REG 0xd806
77 #define SERDES_RST_N_LBN 13
78 #define XGXS_RST_N_LBN 12
80 #define PCS_TEST_SELECT_REG 0xd807 /* PRM 10.5.8 */
81 #define CLK312_EN_LBN 3
84 #define PHYXS_TEST1 (49162)
85 #define LOOPBACK_NEAR_LBN (8)
86 #define LOOPBACK_NEAR_WIDTH (1)
88 /* Boot status register */
89 #define PCS_BOOT_STATUS_REG (0xd000)
90 #define PCS_BOOT_FATAL_ERR_LBN (0)
91 #define PCS_BOOT_PROGRESS_LBN (1)
92 #define PCS_BOOT_PROGRESS_WIDTH (2)
93 #define PCS_BOOT_COMPLETE_LBN (3)
94 #define PCS_BOOT_MAX_DELAY (100)
95 #define PCS_BOOT_POLL_DELAY (10)
97 /* Time to wait between powering down the LNPGA and turning off the power
99 #define LNPGA_PDOWN_WAIT (HZ / 5)
101 static int crc_error_reset_threshold = 100;
102 module_param(crc_error_reset_threshold, int, 0644);
103 MODULE_PARM_DESC(crc_error_reset_threshold,
104 "Max number of CRC errors before XAUI reset");
106 struct tenxpress_phy_data {
107 enum efx_loopback_mode loopback_mode;
108 atomic_t bad_crc_count;
109 enum efx_phy_mode phy_mode;
113 void tenxpress_crc_err(struct efx_nic *efx)
115 struct tenxpress_phy_data *phy_data = efx->phy_data;
116 if (phy_data != NULL)
117 atomic_inc(&phy_data->bad_crc_count);
120 /* Check that the C166 has booted successfully */
121 static int tenxpress_phy_check(struct efx_nic *efx)
123 int phy_id = efx->mii.phy_id;
124 int count = PCS_BOOT_MAX_DELAY / PCS_BOOT_POLL_DELAY;
127 /* Wait for the boot to complete (or not) */
129 boot_stat = mdio_clause45_read(efx, phy_id,
131 PCS_BOOT_STATUS_REG);
132 if (boot_stat & (1 << PCS_BOOT_COMPLETE_LBN))
135 udelay(PCS_BOOT_POLL_DELAY);
139 EFX_ERR(efx, "%s: PHY boot timed out. Last status "
141 (boot_stat >> PCS_BOOT_PROGRESS_LBN) &
142 ((1 << PCS_BOOT_PROGRESS_WIDTH) - 1));
149 static int tenxpress_init(struct efx_nic *efx)
153 /* Turn on the clock */
154 reg = (1 << CLK312_EN_LBN);
155 mdio_clause45_write(efx, efx->mii.phy_id,
156 MDIO_MMD_PCS, PCS_TEST_SELECT_REG, reg);
158 rc = tenxpress_phy_check(efx);
162 /* Set the LEDs up as: Green = Link, Amber = Link/Act, Red = Off */
163 reg = mdio_clause45_read(efx, efx->mii.phy_id,
164 MDIO_MMD_PMAPMD, PMA_PMD_LED_CTRL_REG);
165 reg |= (1 << PMA_PMA_LED_ACTIVITY_LBN);
166 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
167 PMA_PMD_LED_CTRL_REG, reg);
169 reg = PMA_PMD_LED_DEFAULT;
170 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
171 PMA_PMD_LED_OVERR_REG, reg);
176 static int tenxpress_phy_init(struct efx_nic *efx)
178 struct tenxpress_phy_data *phy_data;
181 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
184 efx->phy_data = phy_data;
185 phy_data->phy_mode = efx->phy_mode;
187 rc = mdio_clause45_wait_reset_mmds(efx,
188 TENXPRESS_REQUIRED_DEVS);
192 rc = mdio_clause45_check_mmds(efx, TENXPRESS_REQUIRED_DEVS, 0);
196 rc = tenxpress_init(efx);
200 schedule_timeout_uninterruptible(HZ / 5); /* 200ms */
202 /* Let XGXS and SerDes out of reset and resets 10XPress */
203 falcon_reset_xaui(efx);
208 kfree(efx->phy_data);
209 efx->phy_data = NULL;
213 static int tenxpress_special_reset(struct efx_nic *efx)
217 /* The XGMAC clock is driven from the SFC7101/SFT9001 312MHz clock, so
218 * a special software reset can glitch the XGMAC sufficiently for stats
219 * requests to fail. Since we don't ofen special_reset, just lock. */
220 spin_lock(&efx->stats_lock);
223 reg = mdio_clause45_read(efx, efx->mii.phy_id,
224 MDIO_MMD_PMAPMD, PMA_PMD_EXT_CTRL_REG);
225 reg |= (1 << PMA_PMD_EXT_SSR_LBN);
226 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
227 PMA_PMD_EXT_CTRL_REG, reg);
231 /* Wait for the blocks to come out of reset */
232 rc = mdio_clause45_wait_reset_mmds(efx,
233 TENXPRESS_REQUIRED_DEVS);
237 /* Try and reconfigure the device */
238 rc = tenxpress_init(efx);
243 spin_unlock(&efx->stats_lock);
247 static void tenxpress_set_bad_lp(struct efx_nic *efx, bool bad_lp)
249 struct tenxpress_phy_data *pd = efx->phy_data;
252 /* Nothing to do if all is well and was previously so. */
253 if (!(bad_lp || pd->bad_lp_tries))
256 reg = mdio_clause45_read(efx, efx->mii.phy_id,
257 MDIO_MMD_PMAPMD, PMA_PMD_LED_OVERR_REG);
262 pd->bad_lp_tries = 0;
264 if (pd->bad_lp_tries == MAX_BAD_LP_TRIES) {
265 pd->bad_lp_tries = 0; /* Restart count */
266 reg &= ~(PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN);
267 reg |= (PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN);
268 EFX_ERR(efx, "This NIC appears to be plugged into"
269 " a port that is not 10GBASE-T capable.\n"
270 " This PHY is 10GBASE-T ONLY, so no link can"
271 " be established.\n");
273 reg |= (PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN);
275 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
276 PMA_PMD_LED_OVERR_REG, reg);
279 /* Check link status and return a boolean OK value. If the link is NOT
280 * OK we have a quick rummage round to see if we appear to be plugged
281 * into a non-10GBT port and if so warn the user that they won't get
282 * link any time soon as we are 10GBT only, unless caller specified
283 * not to do this check (it isn't useful in loopback) */
284 static bool tenxpress_link_ok(struct efx_nic *efx, bool check_lp)
286 bool ok = mdio_clause45_links_ok(efx, TENXPRESS_REQUIRED_DEVS);
289 tenxpress_set_bad_lp(efx, false);
290 } else if (check_lp) {
291 /* Are we plugged into the wrong sort of link? */
293 int phy_id = efx->mii.phy_id;
294 int an_stat = mdio_clause45_read(efx, phy_id, MDIO_MMD_AN,
296 int xphy_stat = mdio_clause45_read(efx, phy_id,
298 PMA_PMD_XSTATUS_REG);
299 /* Are we plugged into anything that sends FLPs? If
300 * not we can't distinguish between not being plugged
301 * in and being plugged into a non-AN antique. The FLP
302 * bit has the advantage of not clearing when autoneg
304 if (!(xphy_stat & (1 << PMA_PMD_XSTAT_FLP_LBN))) {
305 tenxpress_set_bad_lp(efx, false);
309 /* If it can do 10GBT it must be XNP capable */
310 bad_lp = !(an_stat & (1 << MDIO_AN_STATUS_XNP_LBN));
311 if (!bad_lp && (an_stat & (1 << MDIO_AN_STATUS_PAGE_LBN))) {
312 bad_lp = !(mdio_clause45_read(efx, phy_id,
313 MDIO_MMD_AN, MDIO_AN_10GBT_STATUS) &
314 (1 << MDIO_AN_10GBT_STATUS_LP_10G_LBN));
316 tenxpress_set_bad_lp(efx, bad_lp);
321 static void tenxpress_phyxs_loopback(struct efx_nic *efx)
323 int phy_id = efx->mii.phy_id;
326 ctrl1 = ctrl2 = mdio_clause45_read(efx, phy_id, MDIO_MMD_PHYXS,
328 if (efx->loopback_mode == LOOPBACK_PHYXS)
329 ctrl2 |= (1 << LOOPBACK_NEAR_LBN);
331 ctrl2 &= ~(1 << LOOPBACK_NEAR_LBN);
333 mdio_clause45_write(efx, phy_id, MDIO_MMD_PHYXS,
337 static void tenxpress_phy_reconfigure(struct efx_nic *efx)
339 struct tenxpress_phy_data *phy_data = efx->phy_data;
340 bool loop_change = LOOPBACK_OUT_OF(phy_data, efx,
341 TENXPRESS_LOOPBACKS);
343 if (efx->phy_mode & PHY_MODE_SPECIAL) {
344 phy_data->phy_mode = efx->phy_mode;
348 /* When coming out of transmit disable, coming out of low power
349 * mode, or moving out of any PHY internal loopback mode,
350 * perform a special software reset */
351 if ((efx->phy_mode == PHY_MODE_NORMAL &&
352 phy_data->phy_mode != PHY_MODE_NORMAL) ||
354 tenxpress_special_reset(efx);
355 falcon_reset_xaui(efx);
358 mdio_clause45_transmit_disable(efx);
359 mdio_clause45_phy_reconfigure(efx);
360 tenxpress_phyxs_loopback(efx);
362 phy_data->loopback_mode = efx->loopback_mode;
363 phy_data->phy_mode = efx->phy_mode;
364 efx->link_up = tenxpress_link_ok(efx, false);
365 efx->link_options = GM_LPA_10000FULL;
368 static void tenxpress_phy_clear_interrupt(struct efx_nic *efx)
370 /* Nothing done here - LASI interrupts aren't reliable so poll */
374 /* Poll PHY for interrupt */
375 static int tenxpress_phy_check_hw(struct efx_nic *efx)
377 struct tenxpress_phy_data *phy_data = efx->phy_data;
380 link_ok = tenxpress_link_ok(efx, true);
382 if (link_ok != efx->link_up)
383 falcon_xmac_sim_phy_event(efx);
385 if (phy_data->phy_mode != PHY_MODE_NORMAL)
388 if (atomic_read(&phy_data->bad_crc_count) > crc_error_reset_threshold) {
389 EFX_ERR(efx, "Resetting XAUI due to too many CRC errors\n");
390 falcon_reset_xaui(efx);
391 atomic_set(&phy_data->bad_crc_count, 0);
397 static void tenxpress_phy_fini(struct efx_nic *efx)
401 /* Power down the LNPGA */
402 reg = (1 << PMA_PMD_LNPGA_POWERDOWN_LBN);
403 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
404 PMA_PMD_XCONTROL_REG, reg);
406 /* Waiting here ensures that the board fini, which can turn off the
407 * power to the PHY, won't get run until the LNPGA powerdown has been
408 * given long enough to complete. */
409 schedule_timeout_uninterruptible(LNPGA_PDOWN_WAIT); /* 200 ms */
411 kfree(efx->phy_data);
412 efx->phy_data = NULL;
416 /* Set the RX and TX LEDs and Link LED flashing. The other LEDs
417 * (which probably aren't wired anyway) are left in AUTO mode */
418 void tenxpress_phy_blink(struct efx_nic *efx, bool blink)
423 reg = (PMA_PMD_LED_FLASH << PMA_PMD_LED_TX_LBN) |
424 (PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN) |
425 (PMA_PMD_LED_FLASH << PMA_PMD_LED_LINK_LBN);
427 reg = PMA_PMD_LED_DEFAULT;
429 mdio_clause45_write(efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
430 PMA_PMD_LED_OVERR_REG, reg);
433 static int tenxpress_phy_test(struct efx_nic *efx)
435 /* BIST is automatically run after a special software reset */
436 return tenxpress_special_reset(efx);
439 struct efx_phy_operations falcon_tenxpress_phy_ops = {
440 .init = tenxpress_phy_init,
441 .reconfigure = tenxpress_phy_reconfigure,
442 .check_hw = tenxpress_phy_check_hw,
443 .fini = tenxpress_phy_fini,
444 .clear_interrupt = tenxpress_phy_clear_interrupt,
445 .test = tenxpress_phy_test,
446 .mmds = TENXPRESS_REQUIRED_DEVS,
447 .loopbacks = TENXPRESS_LOOPBACKS,