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* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
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* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* This file contains all of the code that is specific to the SerDes
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* on the QLogic_IB 7220 chip.
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/firmware.h>
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#define SD7220_FW_NAME "qlogic/sd7220.fw"
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MODULE_FIRMWARE(SD7220_FW_NAME);
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* Same as in qib_iba7220.c, but just the registers needed here.
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* Could move whole set to qib_7220.h, but decided better to keep
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#define KREG_IDX(regname) (QIB_7220_##regname##_OFFS / sizeof(u64))
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#define kr_hwerrclear KREG_IDX(HwErrClear)
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#define kr_hwerrmask KREG_IDX(HwErrMask)
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#define kr_hwerrstatus KREG_IDX(HwErrStatus)
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#define kr_ibcstatus KREG_IDX(IBCStatus)
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#define kr_ibserdesctrl KREG_IDX(IBSerDesCtrl)
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#define kr_scratch KREG_IDX(Scratch)
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#define kr_xgxs_cfg KREG_IDX(XGXSCfg)
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/* these are used only here, not in qib_iba7220.c */
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#define kr_ibsd_epb_access_ctrl KREG_IDX(ibsd_epb_access_ctrl)
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#define kr_ibsd_epb_transaction_reg KREG_IDX(ibsd_epb_transaction_reg)
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#define kr_pciesd_epb_transaction_reg KREG_IDX(pciesd_epb_transaction_reg)
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#define kr_pciesd_epb_access_ctrl KREG_IDX(pciesd_epb_access_ctrl)
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#define kr_serdes_ddsrxeq0 KREG_IDX(SerDes_DDSRXEQ0)
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* The IBSerDesMappTable is a memory that holds values to be stored in
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* various SerDes registers by IBC.
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#define kr_serdes_maptable KREG_IDX(IBSerDesMappTable)
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* Below used for sdnum parameter, selecting one of the two sections
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* used for PCIe, or the single SerDes used for IB.
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#define PCIE_SERDES0 0
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#define PCIE_SERDES1 1
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* The EPB requires addressing in a particular form. EPB_LOC() is intended
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* to make #definitions a little more readable.
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#define EPB_ADDR_SHF 8
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#define EPB_LOC(chn, elt, reg) \
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(((elt & 0xf) | ((chn & 7) << 4) | ((reg & 0x3f) << 9)) << \
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#define EPB_IB_QUAD0_CS_SHF (25)
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#define EPB_IB_QUAD0_CS (1U << EPB_IB_QUAD0_CS_SHF)
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#define EPB_IB_UC_CS_SHF (26)
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#define EPB_PCIE_UC_CS_SHF (27)
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#define EPB_GLOBAL_WR (1U << (EPB_ADDR_SHF + 8))
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/* Forward declarations. */
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static int qib_sd7220_reg_mod(struct qib_devdata *dd, int sdnum, u32 loc,
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static int ibsd_mod_allchnls(struct qib_devdata *dd, int loc, int val,
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static int qib_sd_trimdone_poll(struct qib_devdata *dd);
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static void qib_sd_trimdone_monitor(struct qib_devdata *dd, const char *where);
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static int qib_sd_setvals(struct qib_devdata *dd);
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static int qib_sd_early(struct qib_devdata *dd);
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static int qib_sd_dactrim(struct qib_devdata *dd);
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static int qib_internal_presets(struct qib_devdata *dd);
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/* Tweak the register (CMUCTRL5) that contains the TRIMSELF controls */
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static int qib_sd_trimself(struct qib_devdata *dd, int val);
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static int epb_access(struct qib_devdata *dd, int sdnum, int claim);
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static int qib_sd7220_ib_load(struct qib_devdata *dd,
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const struct firmware *fw);
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static int qib_sd7220_ib_vfy(struct qib_devdata *dd,
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const struct firmware *fw);
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* Below keeps track of whether the "once per power-on" initialization has
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* been done, because uC code Version 1.32.17 or higher allows the uC to
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* be reset at will, and Automatic Equalization may require it. So the
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* state of the reset "pin", is no longer valid. Instead, we check for the
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* actual uC code having been loaded.
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static int qib_ibsd_ucode_loaded(struct qib_pportdata *ppd,
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const struct firmware *fw)
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struct qib_devdata *dd = ppd->dd;
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if (!dd->cspec->serdes_first_init_done &&
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qib_sd7220_ib_vfy(dd, fw) > 0)
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dd->cspec->serdes_first_init_done = 1;
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return dd->cspec->serdes_first_init_done;
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/* repeat #define for local use. "Real" #define is in qib_iba7220.c */
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#define QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR 0x0000004000000000ULL
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#define IB_MPREG5 (EPB_LOC(6, 0, 0xE) | (1L << EPB_IB_UC_CS_SHF))
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#define IB_MPREG6 (EPB_LOC(6, 0, 0xF) | (1U << EPB_IB_UC_CS_SHF))
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#define UC_PAR_CLR_D 8
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#define UC_PAR_CLR_M 0xC
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#define IB_CTRL2(chn) (EPB_LOC(chn, 7, 3) | EPB_IB_QUAD0_CS)
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#define START_EQ1(chan) EPB_LOC(chan, 7, 0x27)
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void qib_sd7220_clr_ibpar(struct qib_devdata *dd)
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/* clear, then re-enable parity errs */
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6,
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UC_PAR_CLR_D, UC_PAR_CLR_M);
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qib_dev_err(dd, "Failed clearing IBSerDes Parity err\n");
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0,
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qib_read_kreg32(dd, kr_scratch);
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qib_write_kreg(dd, kr_hwerrclear,
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QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR);
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qib_read_kreg32(dd, kr_scratch);
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* After a reset or other unusual event, the epb interface may need
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* to be re-synchronized, between the host and the uC.
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* returns <0 for failure to resync within IBSD_RESYNC_TRIES (not expected)
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#define IBSD_RESYNC_TRIES 3
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#define IB_PGUDP(chn) (EPB_LOC((chn), 2, 1) | EPB_IB_QUAD0_CS)
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#define IB_CMUDONE(chn) (EPB_LOC((chn), 7, 0xF) | EPB_IB_QUAD0_CS)
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static int qib_resync_ibepb(struct qib_devdata *dd)
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int ret, pat, tries, chn;
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for (tries = 0; tries < (4 * IBSD_RESYNC_TRIES); ++tries) {
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0);
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qib_dev_err(dd, "Failed read in resync\n");
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if (ret != 0xF0 && ret != 0x55 && tries == 0)
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qib_dev_err(dd, "unexpected pattern in resync\n");
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pat = ret ^ 0xA5; /* alternate F0 and 55 */
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, loc, pat, 0xFF);
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qib_dev_err(dd, "Failed write in resync\n");
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0);
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qib_dev_err(dd, "Failed re-read in resync\n");
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qib_dev_err(dd, "Failed compare1 in resync\n");
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loc = IB_CMUDONE(chn);
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0);
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qib_dev_err(dd, "Failed CMUDONE rd in resync\n");
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if ((ret & 0x70) != ((chn << 4) | 0x40)) {
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qib_dev_err(dd, "Bad CMUDONE value %02X, chn %d\n",
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return (ret > 0) ? 0 : ret;
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* Localize the stuff that should be done to change IB uC reset
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* returns <0 for errors.
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static int qib_ibsd_reset(struct qib_devdata *dd, int assert_rst)
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rst_val = qib_read_kreg64(dd, kr_ibserdesctrl);
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* Vendor recommends "interrupting" uC before reset, to
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* minimize possible glitches.
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spin_lock_irqsave(&dd->cspec->sdepb_lock, flags);
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epb_access(dd, IB_7220_SERDES, 1);
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/* Squelch possible parity error from _asserting_ reset */
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qib_write_kreg(dd, kr_hwerrmask,
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dd->cspec->hwerrmask &
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~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR);
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qib_write_kreg(dd, kr_ibserdesctrl, rst_val);
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/* flush write, delay to ensure it took effect */
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qib_read_kreg32(dd, kr_scratch);
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/* once it's reset, can remove interrupt */
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epb_access(dd, IB_7220_SERDES, -1);
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spin_unlock_irqrestore(&dd->cspec->sdepb_lock, flags);
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* Before we de-assert reset, we need to deal with
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* possible glitch on the Parity-error line.
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* Suppress it around the reset, both in chip-level
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* hwerrmask and in IB uC control reg. uC will allow
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* it again during startup.
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qib_write_kreg(dd, kr_hwerrmask,
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dd->cspec->hwerrmask &
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~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR);
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ret = qib_resync_ibepb(dd);
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qib_dev_err(dd, "unable to re-sync IB EPB\n");
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/* set uC control regs to suppress parity errs */
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG5, 1, 1);
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/* IB uC code past Version 1.32.17 allow suppression of wdog */
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0x80,
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qib_dev_err(dd, "Failed to set WDOG disable\n");
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qib_write_kreg(dd, kr_ibserdesctrl, rst_val);
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/* flush write, delay for startup */
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qib_read_kreg32(dd, kr_scratch);
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/* clear, then re-enable parity errs */
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qib_sd7220_clr_ibpar(dd);
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val = qib_read_kreg64(dd, kr_hwerrstatus);
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if (val & QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR) {
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qib_dev_err(dd, "IBUC Parity still set after RST\n");
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dd->cspec->hwerrmask &=
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~QLOGIC_IB_HWE_IB_UC_MEMORYPARITYERR;
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qib_write_kreg(dd, kr_hwerrmask,
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dd->cspec->hwerrmask);
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static void qib_sd_trimdone_monitor(struct qib_devdata *dd,
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int ret, chn, baduns;
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/* give time for reset to settle out in EPB */
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ret = qib_resync_ibepb(dd);
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qib_dev_err(dd, "not able to re-sync IB EPB (%s)\n", where);
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/* Do "sacrificial read" to get EPB in sane state after reset */
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_CTRL2(0), 0, 0);
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qib_dev_err(dd, "Failed TRIMDONE 1st read, (%s)\n", where);
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/* Check/show "summary" Trim-done bit in IBCStatus */
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val = qib_read_kreg64(dd, kr_ibcstatus);
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if (!(val & (1ULL << 11)))
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qib_dev_err(dd, "IBCS TRIMDONE clear (%s)\n", where);
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* Do "dummy read/mod/wr" to get EPB in sane state after reset
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* The default value for MPREG6 is 0.
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0x80, 0x80);
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qib_dev_err(dd, "Failed Dummy RMW, (%s)\n", where);
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for (chn = 3; chn >= 0; --chn) {
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/* Read CTRL reg for each channel to check TRIMDONE */
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
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IB_CTRL2(chn), 0, 0);
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qib_dev_err(dd, "Failed checking TRIMDONE, chn %d"
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" (%s)\n", chn, where);
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baduns |= (1 << chn);
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qib_dev_err(dd, "TRIMDONE cleared on chn %d (%02X)."
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" (%s)\n", chn, ret, where);
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probe = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
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qib_dev_err(dd, "probe is %d (%02X)\n",
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probe = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
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IB_CTRL2(chn), 0, 0);
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qib_dev_err(dd, "re-read: %d (%02X)\n",
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
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IB_CTRL2(chn), 0x10, 0x10);
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"Err on TRIMDONE rewrite1\n");
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for (chn = 3; chn >= 0; --chn) {
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/* Read CTRL reg for each channel to check TRIMDONE */
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if (baduns & (1 << chn)) {
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"Reseting TRIMDONE on chn %d (%s)\n",
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ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
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IB_CTRL2(chn), 0x10, 0x10);
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qib_dev_err(dd, "Failed re-setting "
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"TRIMDONE, chn %d (%s)\n",
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* Below is portion of IBA7220-specific bringup_serdes() that actually
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* deals with registers and memory within the SerDes itself.
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* Post IB uC code version 1.32.17, was_reset being 1 is not really
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* informative, so we double-check.
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int qib_sd7220_init(struct qib_devdata *dd)
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const struct firmware *fw;
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int ret = 1; /* default to failure */
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int first_reset, was_reset;
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/* SERDES MPU reset recorded in D0 */
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was_reset = (qib_read_kreg64(dd, kr_ibserdesctrl) & 1);
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/* entered with reset not asserted, we need to do it */
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qib_ibsd_reset(dd, 1);
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qib_sd_trimdone_monitor(dd, "Driver-reload");
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ret = request_firmware(&fw, SD7220_FW_NAME, &dd->pcidev->dev);
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qib_dev_err(dd, "Failed to load IB SERDES image\n");
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/* Substitute our deduced value for was_reset */
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ret = qib_ibsd_ucode_loaded(dd->pport, fw);
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first_reset = !ret; /* First reset if IBSD uCode not yet loaded */
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* Alter some regs per vendor latest doc, reset-defaults
419
* are not right for IB.
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ret = qib_sd_early(dd);
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qib_dev_err(dd, "Failed to set IB SERDES early defaults\n");
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* Set DAC manual trim IB.
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* We only do this once after chip has been reset (usually
429
* same as once per system boot).
432
ret = qib_sd_dactrim(dd);
434
qib_dev_err(dd, "Failed IB SERDES DAC trim\n");
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* Set various registers (DDS and RXEQ) that will be
440
* controlled by IBC (in 1.2 mode) to reasonable preset values
441
* Calling the "internal" version avoids the "check for needed"
442
* and "trimdone monitor" that might be counter-productive.
444
ret = qib_internal_presets(dd);
446
qib_dev_err(dd, "Failed to set IB SERDES presets\n");
449
ret = qib_sd_trimself(dd, 0x80);
451
qib_dev_err(dd, "Failed to set IB SERDES TRIMSELF\n");
455
/* Load image, then try to verify */
456
ret = 0; /* Assume success */
461
ret = qib_sd7220_ib_load(dd, fw);
463
qib_dev_err(dd, "Failed to load IB SERDES image\n");
466
/* Loaded image, try to verify */
467
vfy = qib_sd7220_ib_vfy(dd, fw);
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qib_dev_err(dd, "SERDES PRAM VFY failed\n");
471
} /* end if verified */
472
} /* end if loaded */
475
* Loaded and verified. Almost good...
476
* hold "success" in ret
480
* Prev steps all worked, continue bringup
481
* De-assert RESET to uC, only in first reset, to allow
484
* Since our default setup sets START_EQ1 to
485
* PRESET, we need to clear that for this very first run.
487
ret = ibsd_mod_allchnls(dd, START_EQ1(0), 0, 0x38);
489
qib_dev_err(dd, "Failed clearing START_EQ1\n");
493
qib_ibsd_reset(dd, 0);
495
* If this is not the first reset, trimdone should be set
496
* already. We may need to check about this.
498
trim_done = qib_sd_trimdone_poll(dd);
500
* Whether or not trimdone succeeded, we need to put the
501
* uC back into reset to avoid a possible fight with the
504
qib_ibsd_reset(dd, 1);
507
qib_dev_err(dd, "No TRIMDONE seen\n");
511
* DEBUG: check each time we reset if trimdone bits have
512
* gotten cleared, and re-set them.
514
qib_sd_trimdone_monitor(dd, "First-reset");
515
/* Remember so we do not re-do the load, dactrim, etc. */
516
dd->cspec->serdes_first_init_done = 1;
519
* setup for channel training and load values for
520
* RxEq and DDS in tables used by IBC in IB1.2 mode
523
if (qib_sd_setvals(dd) >= 0)
528
/* start relock timer regardless, but start at 1 second */
529
set_7220_relock_poll(dd, -1);
531
release_firmware(fw);
535
#define EPB_ACC_REQ 1
536
#define EPB_ACC_GNT 0x100
537
#define EPB_DATA_MASK 0xFF
538
#define EPB_RD (1ULL << 24)
539
#define EPB_TRANS_RDY (1ULL << 31)
540
#define EPB_TRANS_ERR (1ULL << 30)
541
#define EPB_TRANS_TRIES 5
544
* query, claim, release ownership of the EPB (External Parallel Bus)
545
* for a specified SERDES.
546
* the "claim" parameter is >0 to claim, <0 to release, 0 to query.
547
* Returns <0 for errors, >0 if we had ownership, else 0.
549
static int epb_access(struct qib_devdata *dd, int sdnum, int claim)
559
* The IB SERDES "ownership" is fairly simple. A single each
562
acc = kr_ibsd_epb_access_ctrl;
567
/* PCIe SERDES has two "octants", need to select which */
568
acc = kr_pciesd_epb_access_ctrl;
569
oct_sel = (2 << (sdnum - PCIE_SERDES0));
576
/* Make sure any outstanding transaction was seen */
577
qib_read_kreg32(dd, kr_scratch);
580
accval = qib_read_kreg32(dd, acc);
582
owned = !!(accval & EPB_ACC_GNT);
584
/* Need to release */
587
* The only writeable bits are the request and CS.
588
* Both should be clear
591
qib_write_kreg(dd, acc, newval);
592
/* First read after write is not trustworthy */
593
pollval = qib_read_kreg32(dd, acc);
595
pollval = qib_read_kreg32(dd, acc);
596
if (pollval & EPB_ACC_GNT)
598
} else if (claim > 0) {
601
u64 newval = EPB_ACC_REQ | oct_sel;
602
qib_write_kreg(dd, acc, newval);
603
/* First read after write is not trustworthy */
604
pollval = qib_read_kreg32(dd, acc);
606
pollval = qib_read_kreg32(dd, acc);
607
if (!(pollval & EPB_ACC_GNT))
614
* Lemma to deal with race condition of write..read to epb regs
616
static int epb_trans(struct qib_devdata *dd, u16 reg, u64 i_val, u64 *o_vp)
621
qib_write_kreg(dd, reg, i_val);
622
/* Throw away first read, as RDY bit may be stale */
623
transval = qib_read_kreg64(dd, reg);
625
for (tries = EPB_TRANS_TRIES; tries; --tries) {
626
transval = qib_read_kreg32(dd, reg);
627
if (transval & EPB_TRANS_RDY)
631
if (transval & EPB_TRANS_ERR)
633
if (tries > 0 && o_vp)
639
* qib_sd7220_reg_mod - modify SERDES register
640
* @dd: the qlogic_ib device
641
* @sdnum: which SERDES to access
642
* @loc: location - channel, element, register, as packed by EPB_LOC() macro.
643
* @wd: Write Data - value to set in register
644
* @mask: ones where data should be spliced into reg.
646
* Basic register read/modify/write, with un-needed acesses elided. That is,
647
* a mask of zero will prevent write, while a mask of 0xFF will prevent read.
648
* returns current (presumed, if a write was done) contents of selected
649
* register, or <0 if errors.
651
static int qib_sd7220_reg_mod(struct qib_devdata *dd, int sdnum, u32 loc,
662
trans = kr_ibsd_epb_transaction_reg;
667
trans = kr_pciesd_epb_transaction_reg;
675
* All access is locked in software (vs other host threads) and
676
* hardware (vs uC access).
678
spin_lock_irqsave(&dd->cspec->sdepb_lock, flags);
680
owned = epb_access(dd, sdnum, 1);
682
spin_unlock_irqrestore(&dd->cspec->sdepb_lock, flags);
686
for (tries = EPB_TRANS_TRIES; tries; --tries) {
687
transval = qib_read_kreg32(dd, trans);
688
if (transval & EPB_TRANS_RDY)
694
tries = 1; /* to make read-skip work */
697
* Not a pure write, so need to read.
698
* loc encodes chip-select as well as address
700
transval = loc | EPB_RD;
701
tries = epb_trans(dd, trans, transval, &transval);
703
if (tries > 0 && mask != 0) {
705
* Not a pure read, so need to write.
707
wd = (wd & mask) | (transval & ~mask);
708
transval = loc | (wd & EPB_DATA_MASK);
709
tries = epb_trans(dd, trans, transval, &transval);
712
/* else, failed to see ready, what error-handling? */
715
* Release bus. Failure is an error.
717
if (epb_access(dd, sdnum, -1) < 0)
720
ret = transval & EPB_DATA_MASK;
722
spin_unlock_irqrestore(&dd->cspec->sdepb_lock, flags);
728
#define EPB_ROM_R (2)
729
#define EPB_ROM_W (1)
731
* Below, all uC-related, use appropriate UC_CS, depending
732
* on which SerDes is used.
734
#define EPB_UC_CTL EPB_LOC(6, 0, 0)
735
#define EPB_MADDRL EPB_LOC(6, 0, 2)
736
#define EPB_MADDRH EPB_LOC(6, 0, 3)
737
#define EPB_ROMDATA EPB_LOC(6, 0, 4)
738
#define EPB_RAMDATA EPB_LOC(6, 0, 5)
740
/* Transfer date to/from uC Program RAM of IB or PCIe SerDes */
741
static int qib_sd7220_ram_xfer(struct qib_devdata *dd, int sdnum, u32 loc,
742
u8 *buf, int cnt, int rd_notwr)
755
/* Pick appropriate transaction reg and "Chip select" for this serdes */
758
csbit = 1ULL << EPB_IB_UC_CS_SHF;
759
trans = kr_ibsd_epb_transaction_reg;
764
/* PCIe SERDES has uC "chip select" in different bit, too */
765
csbit = 1ULL << EPB_PCIE_UC_CS_SHF;
766
trans = kr_pciesd_epb_transaction_reg;
773
op = rd_notwr ? "Rd" : "Wr";
774
spin_lock_irqsave(&dd->cspec->sdepb_lock, flags);
776
owned = epb_access(dd, sdnum, 1);
778
spin_unlock_irqrestore(&dd->cspec->sdepb_lock, flags);
783
* In future code, we may need to distinguish several address ranges,
784
* and select various memories based on this. For now, just trim
785
* "loc" (location including address and memory select) to
786
* "addr" (address within memory). we will only support PRAM
790
for (tries = EPB_TRANS_TRIES; tries; --tries) {
791
transval = qib_read_kreg32(dd, trans);
792
if (transval & EPB_TRANS_RDY)
800
* Every "memory" access is doubly-indirect.
801
* We set two bytes of address, then read/write
802
* one or mores bytes of data.
805
/* First, we set control to "Read" or "Write" */
806
transval = csbit | EPB_UC_CTL |
807
(rd_notwr ? EPB_ROM_R : EPB_ROM_W);
808
tries = epb_trans(dd, trans, transval, &transval);
809
while (tries > 0 && sofar < cnt) {
811
/* Only set address at start of chunk */
812
int addrbyte = (addr + sofar) >> 8;
813
transval = csbit | EPB_MADDRH | addrbyte;
814
tries = epb_trans(dd, trans, transval,
818
addrbyte = (addr + sofar) & 0xFF;
819
transval = csbit | EPB_MADDRL | addrbyte;
820
tries = epb_trans(dd, trans, transval,
827
transval = csbit | EPB_ROMDATA | EPB_RD;
829
transval = csbit | EPB_ROMDATA | buf[sofar];
830
tries = epb_trans(dd, trans, transval, &transval);
834
buf[sofar] = transval & EPB_DATA_MASK;
837
/* Finally, clear control-bit for Read or Write */
838
transval = csbit | EPB_UC_CTL;
839
tries = epb_trans(dd, trans, transval, &transval);
843
/* Release bus. Failure is an error */
844
if (epb_access(dd, sdnum, -1) < 0)
847
spin_unlock_irqrestore(&dd->cspec->sdepb_lock, flags);
853
#define PROG_CHUNK 64
855
static int qib_sd7220_prog_ld(struct qib_devdata *dd, int sdnum,
856
const u8 *img, int len, int offset)
861
while (sofar < len) {
863
if (req > PROG_CHUNK)
865
cnt = qib_sd7220_ram_xfer(dd, sdnum, offset + sofar,
866
(u8 *)img + sofar, req, 0);
877
#define SD_PRAM_ERROR_LIMIT 42
879
static int qib_sd7220_prog_vfy(struct qib_devdata *dd, int sdnum,
880
const u8 *img, int len, int offset)
882
int cnt, sofar, req, idx, errors;
883
unsigned char readback[VFY_CHUNK];
887
while (sofar < len) {
891
cnt = qib_sd7220_ram_xfer(dd, sdnum, sofar + offset,
894
/* failed in read itself */
898
for (idx = 0; idx < cnt; ++idx) {
899
if (readback[idx] != img[idx+sofar])
904
return errors ? -errors : sofar;
908
qib_sd7220_ib_load(struct qib_devdata *dd, const struct firmware *fw)
910
return qib_sd7220_prog_ld(dd, IB_7220_SERDES, fw->data, fw->size, 0);
914
qib_sd7220_ib_vfy(struct qib_devdata *dd, const struct firmware *fw)
916
return qib_sd7220_prog_vfy(dd, IB_7220_SERDES, fw->data, fw->size, 0);
920
* IRQ not set up at this point in init, so we poll.
922
#define IB_SERDES_TRIM_DONE (1ULL << 11)
923
#define TRIM_TMO (30)
925
static int qib_sd_trimdone_poll(struct qib_devdata *dd)
931
* Default to failure, so IBC will not start
932
* without IB_SERDES_TRIM_DONE.
935
for (trim_tmo = 0; trim_tmo < TRIM_TMO; ++trim_tmo) {
936
val = qib_read_kreg64(dd, kr_ibcstatus);
937
if (val & IB_SERDES_TRIM_DONE) {
943
if (trim_tmo >= TRIM_TMO) {
944
qib_dev_err(dd, "No TRIMDONE in %d tries\n", trim_tmo);
950
#define TX_FAST_ELT (9)
953
* Set the "negotiation" values for SERDES. These are used by the IB1.2
954
* link negotiation. Macros below are attempt to keep the values a
955
* little more human-editable.
956
* First, values related to Drive De-emphasis Settings.
959
#define NUM_DDS_REGS 6
960
#define DDS_REG_MAP 0x76A910 /* LSB-first list of regs (in elt 9) to mod */
962
#define DDS_VAL(amp_d, main_d, ipst_d, ipre_d, amp_s, main_s, ipst_s, ipre_s) \
963
{ { ((amp_d & 0x1F) << 1) | 1, ((amp_s & 0x1F) << 1) | 1, \
964
(main_d << 3) | 4 | (ipre_d >> 2), \
965
(main_s << 3) | 4 | (ipre_s >> 2), \
966
((ipst_d & 0xF) << 1) | ((ipre_d & 3) << 6) | 0x21, \
967
((ipst_s & 0xF) << 1) | ((ipre_s & 3) << 6) | 0x21 } }
969
static struct dds_init {
970
uint8_t reg_vals[NUM_DDS_REGS];
971
} dds_init_vals[] = {
972
/* DDR(FDR) SDR(HDR) */
973
/* Vendor recommends below for 3m cable */
975
DDS_VAL(31, 19, 12, 0, 29, 22, 9, 0),
976
DDS_VAL(31, 12, 15, 4, 31, 15, 15, 1),
977
DDS_VAL(31, 13, 15, 3, 31, 16, 15, 0),
978
DDS_VAL(31, 14, 15, 2, 31, 17, 14, 0),
979
DDS_VAL(31, 15, 15, 1, 31, 18, 13, 0),
980
DDS_VAL(31, 16, 15, 0, 31, 19, 12, 0),
981
DDS_VAL(31, 17, 14, 0, 31, 20, 11, 0),
982
DDS_VAL(31, 18, 13, 0, 30, 21, 10, 0),
983
DDS_VAL(31, 20, 11, 0, 28, 23, 8, 0),
984
DDS_VAL(31, 21, 10, 0, 27, 24, 7, 0),
985
DDS_VAL(31, 22, 9, 0, 26, 25, 6, 0),
986
DDS_VAL(30, 23, 8, 0, 25, 26, 5, 0),
987
DDS_VAL(29, 24, 7, 0, 23, 27, 4, 0),
988
/* Vendor recommends below for 1m cable */
990
DDS_VAL(28, 25, 6, 0, 21, 28, 3, 0),
991
DDS_VAL(27, 26, 5, 0, 19, 29, 2, 0),
992
DDS_VAL(25, 27, 4, 0, 17, 30, 1, 0)
996
* Now the RXEQ section of the table.
998
/* Hardware packs an element number and register address thus: */
999
#define RXEQ_INIT_RDESC(elt, addr) (((elt) & 0xF) | ((addr) << 4))
1000
#define RXEQ_VAL(elt, adr, val0, val1, val2, val3) \
1001
{RXEQ_INIT_RDESC((elt), (adr)), {(val0), (val1), (val2), (val3)} }
1003
#define RXEQ_VAL_ALL(elt, adr, val) \
1004
{RXEQ_INIT_RDESC((elt), (adr)), {(val), (val), (val), (val)} }
1006
#define RXEQ_SDR_DFELTH 0
1007
#define RXEQ_SDR_TLTH 0
1008
#define RXEQ_SDR_G1CNT_Z1CNT 0x11
1009
#define RXEQ_SDR_ZCNT 23
1011
static struct rxeq_init {
1012
u16 rdesc; /* in form used in SerDesDDSRXEQ */
1014
} rxeq_init_vals[] = {
1015
/* Set Rcv Eq. to Preset node */
1016
RXEQ_VAL_ALL(7, 0x27, 0x10),
1017
/* Set DFELTHFDR/HDR thresholds */
1018
RXEQ_VAL(7, 8, 0, 0, 0, 0), /* FDR, was 0, 1, 2, 3 */
1019
RXEQ_VAL(7, 0x21, 0, 0, 0, 0), /* HDR */
1020
/* Set TLTHFDR/HDR theshold */
1021
RXEQ_VAL(7, 9, 2, 2, 2, 2), /* FDR, was 0, 2, 4, 6 */
1022
RXEQ_VAL(7, 0x23, 2, 2, 2, 2), /* HDR, was 0, 1, 2, 3 */
1023
/* Set Preamp setting 2 (ZFR/ZCNT) */
1024
RXEQ_VAL(7, 0x1B, 12, 12, 12, 12), /* FDR, was 12, 16, 20, 24 */
1025
RXEQ_VAL(7, 0x1C, 12, 12, 12, 12), /* HDR, was 12, 16, 20, 24 */
1026
/* Set Preamp DC gain and Setting 1 (GFR/GHR) */
1027
RXEQ_VAL(7, 0x1E, 16, 16, 16, 16), /* FDR, was 16, 17, 18, 20 */
1028
RXEQ_VAL(7, 0x1F, 16, 16, 16, 16), /* HDR, was 16, 17, 18, 20 */
1029
/* Toggle RELOCK (in VCDL_CTRL0) to lock to data */
1030
RXEQ_VAL_ALL(6, 6, 0x20), /* Set D5 High */
1031
RXEQ_VAL_ALL(6, 6, 0), /* Set D5 Low */
1034
/* There are 17 values from vendor, but IBC only accesses the first 16 */
1035
#define DDS_ROWS (16)
1036
#define RXEQ_ROWS ARRAY_SIZE(rxeq_init_vals)
1038
static int qib_sd_setvals(struct qib_devdata *dd)
1041
int min_idx; /* Minimum index for this portion of table */
1042
uint32_t dds_reg_map;
1043
u64 __iomem *taddr, *iaddr;
1047
taddr = dd->kregbase + kr_serdes_maptable;
1048
iaddr = dd->kregbase + kr_serdes_ddsrxeq0;
1051
* Init the DDS section of the table.
1052
* Each "row" of the table provokes NUM_DDS_REG writes, to the
1053
* registers indicated in DDS_REG_MAP.
1055
sdctl = qib_read_kreg64(dd, kr_ibserdesctrl);
1056
sdctl = (sdctl & ~(0x1f << 8)) | (NUM_DDS_REGS << 8);
1057
sdctl = (sdctl & ~(0x1f << 13)) | (RXEQ_ROWS << 13);
1058
qib_write_kreg(dd, kr_ibserdesctrl, sdctl);
1061
* Iterate down table within loop for each register to store.
1063
dds_reg_map = DDS_REG_MAP;
1064
for (idx = 0; idx < NUM_DDS_REGS; ++idx) {
1065
data = ((dds_reg_map & 0xF) << 4) | TX_FAST_ELT;
1066
writeq(data, iaddr + idx);
1068
qib_read_kreg32(dd, kr_scratch);
1070
for (midx = 0; midx < DDS_ROWS; ++midx) {
1071
u64 __iomem *daddr = taddr + ((midx << 4) + idx);
1072
data = dds_init_vals[midx].reg_vals[idx];
1073
writeq(data, daddr);
1075
qib_read_kreg32(dd, kr_scratch);
1076
} /* End inner for (vals for this reg, each row) */
1077
} /* end outer for (regs to be stored) */
1080
* Init the RXEQ section of the table.
1081
* This runs in a different order, as the pattern of
1082
* register references is more complex, but there are only
1083
* four "data" values per register.
1085
min_idx = idx; /* RXEQ indices pick up where DDS left off */
1086
taddr += 0x100; /* RXEQ data is in second half of table */
1087
/* Iterate through RXEQ register addresses */
1088
for (idx = 0; idx < RXEQ_ROWS; ++idx) {
1089
int didx; /* "destination" */
1092
/* didx is offset by min_idx to address RXEQ range of regs */
1093
didx = idx + min_idx;
1094
/* Store the next RXEQ register address */
1095
writeq(rxeq_init_vals[idx].rdesc, iaddr + didx);
1097
qib_read_kreg32(dd, kr_scratch);
1098
/* Iterate through RXEQ values */
1099
for (vidx = 0; vidx < 4; vidx++) {
1100
data = rxeq_init_vals[idx].rdata[vidx];
1101
writeq(data, taddr + (vidx << 6) + idx);
1103
qib_read_kreg32(dd, kr_scratch);
1105
} /* end outer for (Reg-writes for RXEQ) */
1109
#define CMUCTRL5 EPB_LOC(7, 0, 0x15)
1110
#define RXHSCTRL0(chan) EPB_LOC(chan, 6, 0)
1111
#define VCDL_DAC2(chan) EPB_LOC(chan, 6, 5)
1112
#define VCDL_CTRL0(chan) EPB_LOC(chan, 6, 6)
1113
#define VCDL_CTRL2(chan) EPB_LOC(chan, 6, 8)
1114
#define START_EQ2(chan) EPB_LOC(chan, 7, 0x28)
1117
* Repeat a "store" across all channels of the IB SerDes.
1118
* Although nominally it inherits the "read value" of the last
1119
* channel it modified, the only really useful return is <0 for
1120
* failure, >= 0 for success. The parameter 'loc' is assumed to
1121
* be the location in some channel of the register to be modified
1122
* The caller can specify use of the "gang write" option of EPB,
1123
* in which case we use the specified channel data for any fields
1124
* not explicitely written.
1126
static int ibsd_mod_allchnls(struct qib_devdata *dd, int loc, int val,
1132
if (loc & EPB_GLOBAL_WR) {
1134
* Our caller has assured us that we can set all four
1135
* channels at once. Trust that. If mask is not 0xFF,
1136
* we will read the _specified_ channel for our starting
1139
loc |= (1U << EPB_IB_QUAD0_CS_SHF);
1140
chnl = (loc >> (4 + EPB_ADDR_SHF)) & 7;
1142
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES,
1143
loc & ~EPB_GLOBAL_WR, 0, 0);
1145
int sloc = loc >> EPB_ADDR_SHF;
1147
qib_dev_err(dd, "pre-read failed: elt %d,"
1148
" addr 0x%X, chnl %d\n",
1150
(sloc >> 9) & 0x3f, chnl);
1153
val = (ret & ~mask) | (val & mask);
1155
loc &= ~(7 << (4+EPB_ADDR_SHF));
1156
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, loc, val, 0xFF);
1158
int sloc = loc >> EPB_ADDR_SHF;
1160
qib_dev_err(dd, "Global WR failed: elt %d,"
1161
" addr 0x%X, val %02X\n",
1162
(sloc & 0xF), (sloc >> 9) & 0x3f, val);
1166
/* Clear "channel" and set CS so we can simply iterate */
1167
loc &= ~(7 << (4+EPB_ADDR_SHF));
1168
loc |= (1U << EPB_IB_QUAD0_CS_SHF);
1169
for (chnl = 0; chnl < 4; ++chnl) {
1170
int cloc = loc | (chnl << (4+EPB_ADDR_SHF));
1172
ret = qib_sd7220_reg_mod(dd, IB_7220_SERDES, cloc, val, mask);
1174
int sloc = loc >> EPB_ADDR_SHF;
1176
qib_dev_err(dd, "Write failed: elt %d,"
1177
" addr 0x%X, chnl %d, val 0x%02X,"
1179
(sloc & 0xF), (sloc >> 9) & 0x3f, chnl,
1180
val & 0xFF, mask & 0xFF);
1188
* Set the Tx values normally modified by IBC in IB1.2 mode to default
1189
* values, as gotten from first row of init table.
1191
static int set_dds_vals(struct qib_devdata *dd, struct dds_init *ddi)
1197
regmap = DDS_REG_MAP;
1198
for (idx = 0; idx < NUM_DDS_REGS; ++idx) {
1199
reg = (regmap & 0xF);
1201
data = ddi->reg_vals[idx];
1202
/* Vendor says RMW not needed for these regs, use 0xFF mask */
1203
ret = ibsd_mod_allchnls(dd, EPB_LOC(0, 9, reg), data, 0xFF);
1211
* Set the Rx values normally modified by IBC in IB1.2 mode to default
1212
* values, as gotten from selected column of init table.
1214
static int set_rxeq_vals(struct qib_devdata *dd, int vsel)
1218
int cnt = ARRAY_SIZE(rxeq_init_vals);
1220
for (ridx = 0; ridx < cnt; ++ridx) {
1221
int elt, reg, val, loc;
1223
elt = rxeq_init_vals[ridx].rdesc & 0xF;
1224
reg = rxeq_init_vals[ridx].rdesc >> 4;
1225
loc = EPB_LOC(0, elt, reg);
1226
val = rxeq_init_vals[ridx].rdata[vsel];
1227
/* mask of 0xFF, because hardware does full-byte store. */
1228
ret = ibsd_mod_allchnls(dd, loc, val, 0xFF);
1236
* Set the default values (row 0) for DDR Driver Demphasis.
1237
* we do this initially and whenever we turn off IB-1.2
1239
* The "default" values for Rx equalization are also stored to
1240
* SerDes registers. Formerly (and still default), we used set 2.
1241
* For experimenting with cables and link-partners, we allow changing
1242
* that via a module parameter.
1244
static unsigned qib_rxeq_set = 2;
1245
module_param_named(rxeq_default_set, qib_rxeq_set, uint,
1247
MODULE_PARM_DESC(rxeq_default_set,
1248
"Which set [0..3] of Rx Equalization values is default");
1250
static int qib_internal_presets(struct qib_devdata *dd)
1254
ret = set_dds_vals(dd, dds_init_vals + DDS_3M);
1257
qib_dev_err(dd, "Failed to set default DDS values\n");
1258
ret = set_rxeq_vals(dd, qib_rxeq_set & 3);
1260
qib_dev_err(dd, "Failed to set default RXEQ values\n");
1264
int qib_sd7220_presets(struct qib_devdata *dd)
1268
if (!dd->cspec->presets_needed)
1270
dd->cspec->presets_needed = 0;
1271
/* Assert uC reset, so we don't clash with it. */
1272
qib_ibsd_reset(dd, 1);
1274
qib_sd_trimdone_monitor(dd, "link-down");
1276
ret = qib_internal_presets(dd);
1280
static int qib_sd_trimself(struct qib_devdata *dd, int val)
1282
int loc = CMUCTRL5 | (1U << EPB_IB_QUAD0_CS_SHF);
1284
return qib_sd7220_reg_mod(dd, IB_7220_SERDES, loc, val, 0xFF);
1287
static int qib_sd_early(struct qib_devdata *dd)
1291
ret = ibsd_mod_allchnls(dd, RXHSCTRL0(0) | EPB_GLOBAL_WR, 0xD4, 0xFF);
1294
ret = ibsd_mod_allchnls(dd, START_EQ1(0) | EPB_GLOBAL_WR, 0x10, 0xFF);
1297
ret = ibsd_mod_allchnls(dd, START_EQ2(0) | EPB_GLOBAL_WR, 0x30, 0xFF);
1302
#define BACTRL(chnl) EPB_LOC(chnl, 6, 0x0E)
1303
#define LDOUTCTRL1(chnl) EPB_LOC(chnl, 7, 6)
1304
#define RXHSSTATUS(chnl) EPB_LOC(chnl, 6, 0xF)
1306
static int qib_sd_dactrim(struct qib_devdata *dd)
1310
ret = ibsd_mod_allchnls(dd, VCDL_DAC2(0) | EPB_GLOBAL_WR, 0x2D, 0xFF);
1314
/* more fine-tuning of what will be default */
1315
ret = ibsd_mod_allchnls(dd, VCDL_CTRL2(0), 3, 0xF);
1319
ret = ibsd_mod_allchnls(dd, BACTRL(0) | EPB_GLOBAL_WR, 0x40, 0xFF);
1323
ret = ibsd_mod_allchnls(dd, LDOUTCTRL1(0) | EPB_GLOBAL_WR, 0x04, 0xFF);
1327
ret = ibsd_mod_allchnls(dd, RXHSSTATUS(0) | EPB_GLOBAL_WR, 0x04, 0xFF);
1332
* Delay for max possible number of steps, with slop.
1333
* Each step is about 4usec.
1337
ret = ibsd_mod_allchnls(dd, LDOUTCTRL1(0) | EPB_GLOBAL_WR, 0x00, 0xFF);
1343
#define RELOCK_FIRST_MS 3
1344
#define RXLSPPM(chan) EPB_LOC(chan, 0, 2)
1345
void toggle_7220_rclkrls(struct qib_devdata *dd)
1347
int loc = RXLSPPM(0) | EPB_GLOBAL_WR;
1350
ret = ibsd_mod_allchnls(dd, loc, 0, 0x80);
1352
qib_dev_err(dd, "RCLKRLS failed to clear D7\n");
1355
ibsd_mod_allchnls(dd, loc, 0x80, 0x80);
1357
/* And again for good measure */
1359
ret = ibsd_mod_allchnls(dd, loc, 0, 0x80);
1361
qib_dev_err(dd, "RCLKRLS failed to clear D7\n");
1364
ibsd_mod_allchnls(dd, loc, 0x80, 0x80);
1366
/* Now reset xgxs and IBC to complete the recovery */
1367
dd->f_xgxs_reset(dd->pport);
1371
* Shut down the timer that polls for relock occasions, if needed
1372
* this is "hooked" from qib_7220_quiet_serdes(), which is called
1373
* just before qib_shutdown_device() in qib_driver.c shuts down all
1376
void shutdown_7220_relock_poll(struct qib_devdata *dd)
1378
if (dd->cspec->relock_timer_active)
1379
del_timer_sync(&dd->cspec->relock_timer);
1382
static unsigned qib_relock_by_timer = 1;
1383
module_param_named(relock_by_timer, qib_relock_by_timer, uint,
1385
MODULE_PARM_DESC(relock_by_timer, "Allow relock attempt if link not up");
1387
static void qib_run_relock(unsigned long opaque)
1389
struct qib_devdata *dd = (struct qib_devdata *)opaque;
1390
struct qib_pportdata *ppd = dd->pport;
1391
struct qib_chip_specific *cs = dd->cspec;
1395
* Check link-training state for "stuck" state, when down.
1396
* if found, try relock and schedule another try at
1397
* exponentially growing delay, maxed at one second.
1398
* if not stuck, our work is done.
1400
if ((dd->flags & QIB_INITTED) && !(ppd->lflags &
1401
(QIBL_IB_AUTONEG_INPROG | QIBL_LINKINIT | QIBL_LINKARMED |
1402
QIBL_LINKACTIVE))) {
1403
if (qib_relock_by_timer) {
1404
if (!(ppd->lflags & QIBL_IB_LINK_DISABLED))
1405
toggle_7220_rclkrls(dd);
1407
/* re-set timer for next check */
1408
timeoff = cs->relock_interval << 1;
1411
cs->relock_interval = timeoff;
1414
mod_timer(&cs->relock_timer, jiffies + timeoff);
1417
void set_7220_relock_poll(struct qib_devdata *dd, int ibup)
1419
struct qib_chip_specific *cs = dd->cspec;
1422
/* We are now up, relax timer to 1 second interval */
1423
if (cs->relock_timer_active) {
1424
cs->relock_interval = HZ;
1425
mod_timer(&cs->relock_timer, jiffies + HZ);
1428
/* Transition to down, (re-)set timer to short interval. */
1429
unsigned int timeout;
1431
timeout = msecs_to_jiffies(RELOCK_FIRST_MS);
1434
/* If timer has not yet been started, do so. */
1435
if (!cs->relock_timer_active) {
1436
cs->relock_timer_active = 1;
1437
init_timer(&cs->relock_timer);
1438
cs->relock_timer.function = qib_run_relock;
1439
cs->relock_timer.data = (unsigned long) dd;
1440
cs->relock_interval = timeout;
1441
cs->relock_timer.expires = jiffies + timeout;
1442
add_timer(&cs->relock_timer);
1444
cs->relock_interval = timeout;
1445
mod_timer(&cs->relock_timer, jiffies + timeout);