Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame^] | 1 | /**************************************************************************** |
| 2 | * Driver for Solarflare Solarstorm network controllers and boards |
| 3 | * Copyright 2006-2008 Solarflare Communications Inc. |
| 4 | * |
| 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. |
| 8 | */ |
| 9 | /* |
| 10 | * Driver for XFP optical PHYs (plus some support specific to the Quake 2032) |
| 11 | * See www.amcc.com for details (search for qt2032) |
| 12 | */ |
| 13 | |
| 14 | #include <linux/timer.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include "efx.h" |
| 17 | #include "gmii.h" |
| 18 | #include "mdio_10g.h" |
| 19 | #include "xenpack.h" |
| 20 | #include "phy.h" |
| 21 | #include "mac.h" |
| 22 | |
| 23 | #define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS0_PCS | \ |
| 24 | MDIO_MMDREG_DEVS0_PMAPMD | \ |
| 25 | MDIO_MMDREG_DEVS0_PHYXS) |
| 26 | |
| 27 | /****************************************************************************/ |
| 28 | /* Quake-specific MDIO registers */ |
| 29 | #define MDIO_QUAKE_LED0_REG (0xD006) |
| 30 | |
| 31 | void xfp_set_led(struct efx_nic *p, int led, int mode) |
| 32 | { |
| 33 | int addr = MDIO_QUAKE_LED0_REG + led; |
| 34 | mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr, |
| 35 | mode); |
| 36 | } |
| 37 | |
| 38 | #define XFP_MAX_RESET_TIME 500 |
| 39 | #define XFP_RESET_WAIT 10 |
| 40 | |
| 41 | /* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing |
| 42 | * a complete soft reset. |
| 43 | */ |
| 44 | static int xfp_reset_phy(struct efx_nic *efx) |
| 45 | { |
| 46 | int rc; |
| 47 | |
| 48 | rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS, |
| 49 | XFP_MAX_RESET_TIME / XFP_RESET_WAIT, |
| 50 | XFP_RESET_WAIT); |
| 51 | if (rc < 0) |
| 52 | goto fail; |
| 53 | |
| 54 | /* Wait 250ms for the PHY to complete bootup */ |
| 55 | msleep(250); |
| 56 | |
| 57 | /* Check that all the MMDs we expect are present and responding. We |
| 58 | * expect faults on some if the link is down, but not on the PHY XS */ |
| 59 | rc = mdio_clause45_check_mmds(efx, XFP_REQUIRED_DEVS, |
| 60 | MDIO_MMDREG_DEVS0_PHYXS); |
| 61 | if (rc < 0) |
| 62 | goto fail; |
| 63 | |
| 64 | efx->board_info.init_leds(efx); |
| 65 | |
| 66 | return rc; |
| 67 | |
| 68 | fail: |
| 69 | EFX_ERR(efx, "XFP: reset timed out!\n"); |
| 70 | return rc; |
| 71 | } |
| 72 | |
| 73 | static int xfp_phy_init(struct efx_nic *efx) |
| 74 | { |
| 75 | u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS); |
| 76 | int rc; |
| 77 | |
| 78 | EFX_INFO(efx, "XFP: PHY ID reg %x (OUI %x model %x revision" |
| 79 | " %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid), |
| 80 | MDIO_ID_REV(devid)); |
| 81 | |
| 82 | rc = xfp_reset_phy(efx); |
| 83 | |
| 84 | EFX_INFO(efx, "XFP: PHY init %s.\n", |
| 85 | rc ? "failed" : "successful"); |
| 86 | |
| 87 | return rc; |
| 88 | } |
| 89 | |
| 90 | static void xfp_phy_clear_interrupt(struct efx_nic *efx) |
| 91 | { |
| 92 | xenpack_clear_lasi_irqs(efx); |
| 93 | } |
| 94 | |
| 95 | static int xfp_link_ok(struct efx_nic *efx) |
| 96 | { |
| 97 | return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS); |
| 98 | } |
| 99 | |
| 100 | static int xfp_phy_check_hw(struct efx_nic *efx) |
| 101 | { |
| 102 | int rc = 0; |
| 103 | int link_up = xfp_link_ok(efx); |
| 104 | /* Simulate a PHY event if link state has changed */ |
| 105 | if (link_up != efx->link_up) |
| 106 | falcon_xmac_sim_phy_event(efx); |
| 107 | |
| 108 | return rc; |
| 109 | } |
| 110 | |
| 111 | static void xfp_phy_reconfigure(struct efx_nic *efx) |
| 112 | { |
| 113 | efx->link_up = xfp_link_ok(efx); |
| 114 | efx->link_options = GM_LPA_10000FULL; |
| 115 | } |
| 116 | |
| 117 | |
| 118 | static void xfp_phy_fini(struct efx_nic *efx) |
| 119 | { |
| 120 | /* Clobber the LED if it was blinking */ |
| 121 | efx->board_info.blink(efx, 0); |
| 122 | } |
| 123 | |
| 124 | struct efx_phy_operations falcon_xfp_phy_ops = { |
| 125 | .init = xfp_phy_init, |
| 126 | .reconfigure = xfp_phy_reconfigure, |
| 127 | .check_hw = xfp_phy_check_hw, |
| 128 | .fini = xfp_phy_fini, |
| 129 | .clear_interrupt = xfp_phy_clear_interrupt, |
| 130 | .reset_xaui = efx_port_dummy_op_void, |
| 131 | .mmds = XFP_REQUIRED_DEVS, |
| 132 | }; |