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1081 lines
28 KiB
1081 lines
28 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (c) 2001-2002 by David Brownell |
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*/ |
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|
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/* this file is part of ehci-hcd.c */ |
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|
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#ifdef CONFIG_DYNAMIC_DEBUG |
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|
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/* |
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* check the values in the HCSPARAMS register |
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* (host controller _Structural_ parameters) |
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* see EHCI spec, Table 2-4 for each value |
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*/ |
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static void dbg_hcs_params(struct ehci_hcd *ehci, char *label) |
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{ |
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u32 params = ehci_readl(ehci, &ehci->caps->hcs_params); |
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|
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ehci_dbg(ehci, |
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"%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", |
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label, params, |
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HCS_DEBUG_PORT(params), |
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HCS_INDICATOR(params) ? " ind" : "", |
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HCS_N_CC(params), |
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HCS_N_PCC(params), |
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HCS_PORTROUTED(params) ? "" : " ordered", |
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HCS_PPC(params) ? "" : " !ppc", |
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HCS_N_PORTS(params)); |
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/* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ |
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if (HCS_PORTROUTED(params)) { |
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int i; |
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char buf[46], tmp[7], byte; |
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|
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buf[0] = 0; |
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for (i = 0; i < HCS_N_PORTS(params); i++) { |
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/* FIXME MIPS won't readb() ... */ |
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byte = readb(&ehci->caps->portroute[(i >> 1)]); |
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sprintf(tmp, "%d ", |
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(i & 0x1) ? byte & 0xf : (byte >> 4) & 0xf); |
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strcat(buf, tmp); |
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} |
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ehci_dbg(ehci, "%s portroute %s\n", label, buf); |
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} |
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} |
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|
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/* |
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* check the values in the HCCPARAMS register |
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* (host controller _Capability_ parameters) |
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* see EHCI Spec, Table 2-5 for each value |
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*/ |
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static void dbg_hcc_params(struct ehci_hcd *ehci, char *label) |
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{ |
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u32 params = ehci_readl(ehci, &ehci->caps->hcc_params); |
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|
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if (HCC_ISOC_CACHE(params)) { |
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ehci_dbg(ehci, |
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"%s hcc_params %04x caching frame %s%s%s\n", |
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label, params, |
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HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", |
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HCC_CANPARK(params) ? " park" : "", |
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HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); |
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} else { |
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ehci_dbg(ehci, |
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"%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", |
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label, |
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params, |
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HCC_ISOC_THRES(params), |
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HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", |
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HCC_CANPARK(params) ? " park" : "", |
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HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", |
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HCC_LPM(params) ? " LPM" : "", |
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HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", |
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HCC_HW_PREFETCH(params) ? " hw prefetch" : "", |
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HCC_32FRAME_PERIODIC_LIST(params) ? |
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" 32 periodic list" : ""); |
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} |
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} |
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|
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static void __maybe_unused |
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dbg_qtd(const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) |
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{ |
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ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, |
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hc32_to_cpup(ehci, &qtd->hw_next), |
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hc32_to_cpup(ehci, &qtd->hw_alt_next), |
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hc32_to_cpup(ehci, &qtd->hw_token), |
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hc32_to_cpup(ehci, &qtd->hw_buf[0])); |
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if (qtd->hw_buf[1]) |
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ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", |
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hc32_to_cpup(ehci, &qtd->hw_buf[1]), |
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hc32_to_cpup(ehci, &qtd->hw_buf[2]), |
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hc32_to_cpup(ehci, &qtd->hw_buf[3]), |
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hc32_to_cpup(ehci, &qtd->hw_buf[4])); |
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} |
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|
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static void __maybe_unused |
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dbg_qh(const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) |
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{ |
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struct ehci_qh_hw *hw = qh->hw; |
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|
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ehci_dbg(ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, |
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qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current); |
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dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next); |
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} |
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|
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static void __maybe_unused |
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dbg_itd(const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) |
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{ |
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ehci_dbg(ehci, "%s [%d] itd %p, next %08x, urb %p\n", |
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label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next), |
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itd->urb); |
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ehci_dbg(ehci, |
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" trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", |
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hc32_to_cpu(ehci, itd->hw_transaction[0]), |
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hc32_to_cpu(ehci, itd->hw_transaction[1]), |
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hc32_to_cpu(ehci, itd->hw_transaction[2]), |
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hc32_to_cpu(ehci, itd->hw_transaction[3]), |
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hc32_to_cpu(ehci, itd->hw_transaction[4]), |
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hc32_to_cpu(ehci, itd->hw_transaction[5]), |
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hc32_to_cpu(ehci, itd->hw_transaction[6]), |
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hc32_to_cpu(ehci, itd->hw_transaction[7])); |
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ehci_dbg(ehci, |
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" buf: %08x %08x %08x %08x %08x %08x %08x\n", |
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hc32_to_cpu(ehci, itd->hw_bufp[0]), |
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hc32_to_cpu(ehci, itd->hw_bufp[1]), |
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hc32_to_cpu(ehci, itd->hw_bufp[2]), |
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hc32_to_cpu(ehci, itd->hw_bufp[3]), |
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hc32_to_cpu(ehci, itd->hw_bufp[4]), |
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hc32_to_cpu(ehci, itd->hw_bufp[5]), |
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hc32_to_cpu(ehci, itd->hw_bufp[6])); |
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ehci_dbg(ehci, " index: %d %d %d %d %d %d %d %d\n", |
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itd->index[0], itd->index[1], itd->index[2], |
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itd->index[3], itd->index[4], itd->index[5], |
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itd->index[6], itd->index[7]); |
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} |
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|
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static void __maybe_unused |
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dbg_sitd(const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) |
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{ |
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ehci_dbg(ehci, "%s [%d] sitd %p, next %08x, urb %p\n", |
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label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next), |
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sitd->urb); |
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ehci_dbg(ehci, |
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" addr %08x sched %04x result %08x buf %08x %08x\n", |
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hc32_to_cpu(ehci, sitd->hw_fullspeed_ep), |
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hc32_to_cpu(ehci, sitd->hw_uframe), |
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hc32_to_cpu(ehci, sitd->hw_results), |
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hc32_to_cpu(ehci, sitd->hw_buf[0]), |
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hc32_to_cpu(ehci, sitd->hw_buf[1])); |
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} |
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|
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static int __maybe_unused |
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dbg_status_buf(char *buf, unsigned len, const char *label, u32 status) |
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{ |
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return scnprintf(buf, len, |
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"%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", |
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label, label[0] ? " " : "", status, |
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(status & STS_PPCE_MASK) ? " PPCE" : "", |
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(status & STS_ASS) ? " Async" : "", |
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(status & STS_PSS) ? " Periodic" : "", |
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(status & STS_RECL) ? " Recl" : "", |
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(status & STS_HALT) ? " Halt" : "", |
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(status & STS_IAA) ? " IAA" : "", |
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(status & STS_FATAL) ? " FATAL" : "", |
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(status & STS_FLR) ? " FLR" : "", |
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(status & STS_PCD) ? " PCD" : "", |
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(status & STS_ERR) ? " ERR" : "", |
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(status & STS_INT) ? " INT" : ""); |
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} |
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|
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static int __maybe_unused |
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dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable) |
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{ |
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return scnprintf(buf, len, |
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"%s%sintrenable %02x%s%s%s%s%s%s%s", |
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label, label[0] ? " " : "", enable, |
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(enable & STS_PPCE_MASK) ? " PPCE" : "", |
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(enable & STS_IAA) ? " IAA" : "", |
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(enable & STS_FATAL) ? " FATAL" : "", |
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(enable & STS_FLR) ? " FLR" : "", |
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(enable & STS_PCD) ? " PCD" : "", |
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(enable & STS_ERR) ? " ERR" : "", |
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(enable & STS_INT) ? " INT" : ""); |
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} |
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|
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static const char *const fls_strings[] = { "1024", "512", "256", "??" }; |
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|
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static int |
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dbg_command_buf(char *buf, unsigned len, const char *label, u32 command) |
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{ |
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return scnprintf(buf, len, |
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"%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " |
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"period=%s%s %s", |
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label, label[0] ? " " : "", command, |
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(command & CMD_HIRD) ? " HIRD" : "", |
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(command & CMD_PPCEE) ? " PPCEE" : "", |
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(command & CMD_FSP) ? " FSP" : "", |
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(command & CMD_ASPE) ? " ASPE" : "", |
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(command & CMD_PSPE) ? " PSPE" : "", |
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(command & CMD_PARK) ? " park" : "(park)", |
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CMD_PARK_CNT(command), |
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(command >> 16) & 0x3f, |
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(command & CMD_LRESET) ? " LReset" : "", |
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(command & CMD_IAAD) ? " IAAD" : "", |
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(command & CMD_ASE) ? " Async" : "", |
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(command & CMD_PSE) ? " Periodic" : "", |
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fls_strings[(command >> 2) & 0x3], |
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(command & CMD_RESET) ? " Reset" : "", |
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(command & CMD_RUN) ? "RUN" : "HALT"); |
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} |
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|
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static int |
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dbg_port_buf(char *buf, unsigned len, const char *label, int port, u32 status) |
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{ |
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char *sig; |
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|
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/* signaling state */ |
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switch (status & (3 << 10)) { |
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case 0 << 10: |
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sig = "se0"; |
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break; |
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case 1 << 10: /* low speed */ |
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sig = "k"; |
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break; |
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case 2 << 10: |
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sig = "j"; |
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break; |
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default: |
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sig = "?"; |
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break; |
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} |
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|
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return scnprintf(buf, len, |
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"%s%sport:%d status %06x %d %s%s%s%s%s%s " |
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"sig=%s%s%s%s%s%s%s%s%s%s%s", |
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label, label[0] ? " " : "", port, status, |
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status >> 25, /*device address */ |
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(status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_ACK ? |
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" ACK" : "", |
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(status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_NYET ? |
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" NYET" : "", |
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(status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_STALL ? |
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" STALL" : "", |
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(status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_ERR ? |
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" ERR" : "", |
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(status & PORT_POWER) ? " POWER" : "", |
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(status & PORT_OWNER) ? " OWNER" : "", |
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sig, |
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(status & PORT_LPM) ? " LPM" : "", |
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(status & PORT_RESET) ? " RESET" : "", |
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(status & PORT_SUSPEND) ? " SUSPEND" : "", |
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(status & PORT_RESUME) ? " RESUME" : "", |
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(status & PORT_OCC) ? " OCC" : "", |
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(status & PORT_OC) ? " OC" : "", |
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(status & PORT_PEC) ? " PEC" : "", |
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(status & PORT_PE) ? " PE" : "", |
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(status & PORT_CSC) ? " CSC" : "", |
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(status & PORT_CONNECT) ? " CONNECT" : ""); |
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} |
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|
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static inline void |
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dbg_status(struct ehci_hcd *ehci, const char *label, u32 status) |
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{ |
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char buf[80]; |
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|
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dbg_status_buf(buf, sizeof(buf), label, status); |
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ehci_dbg(ehci, "%s\n", buf); |
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} |
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|
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static inline void |
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dbg_cmd(struct ehci_hcd *ehci, const char *label, u32 command) |
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{ |
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char buf[80]; |
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|
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dbg_command_buf(buf, sizeof(buf), label, command); |
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ehci_dbg(ehci, "%s\n", buf); |
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} |
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|
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static inline void |
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dbg_port(struct ehci_hcd *ehci, const char *label, int port, u32 status) |
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{ |
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char buf[80]; |
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|
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dbg_port_buf(buf, sizeof(buf), label, port, status); |
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ehci_dbg(ehci, "%s\n", buf); |
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} |
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|
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/*-------------------------------------------------------------------------*/ |
|
|
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/* troubleshooting help: expose state in debugfs */ |
|
|
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static int debug_async_open(struct inode *, struct file *); |
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static int debug_bandwidth_open(struct inode *, struct file *); |
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static int debug_periodic_open(struct inode *, struct file *); |
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static int debug_registers_open(struct inode *, struct file *); |
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|
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static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); |
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static int debug_close(struct inode *, struct file *); |
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|
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static const struct file_operations debug_async_fops = { |
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.owner = THIS_MODULE, |
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.open = debug_async_open, |
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.read = debug_output, |
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.release = debug_close, |
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.llseek = default_llseek, |
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}; |
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|
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static const struct file_operations debug_bandwidth_fops = { |
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.owner = THIS_MODULE, |
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.open = debug_bandwidth_open, |
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.read = debug_output, |
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.release = debug_close, |
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.llseek = default_llseek, |
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}; |
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|
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static const struct file_operations debug_periodic_fops = { |
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.owner = THIS_MODULE, |
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.open = debug_periodic_open, |
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.read = debug_output, |
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.release = debug_close, |
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.llseek = default_llseek, |
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}; |
|
|
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static const struct file_operations debug_registers_fops = { |
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.owner = THIS_MODULE, |
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.open = debug_registers_open, |
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.read = debug_output, |
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.release = debug_close, |
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.llseek = default_llseek, |
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}; |
|
|
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static struct dentry *ehci_debug_root; |
|
|
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struct debug_buffer { |
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ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ |
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struct usb_bus *bus; |
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struct mutex mutex; /* protect filling of buffer */ |
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size_t count; /* number of characters filled into buffer */ |
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char *output_buf; |
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size_t alloc_size; |
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}; |
|
|
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static inline char speed_char(u32 info1) |
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{ |
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switch (info1 & (3 << 12)) { |
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case QH_FULL_SPEED: |
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return 'f'; |
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case QH_LOW_SPEED: |
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return 'l'; |
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case QH_HIGH_SPEED: |
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return 'h'; |
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default: |
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return '?'; |
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} |
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} |
|
|
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static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) |
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{ |
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__u32 v = hc32_to_cpu(ehci, token); |
|
|
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if (v & QTD_STS_ACTIVE) |
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return '*'; |
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if (v & QTD_STS_HALT) |
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return '-'; |
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if (!IS_SHORT_READ(v)) |
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return ' '; |
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/* tries to advance through hw_alt_next */ |
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return '/'; |
|
} |
|
|
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static void qh_lines(struct ehci_hcd *ehci, struct ehci_qh *qh, |
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char **nextp, unsigned *sizep) |
|
{ |
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u32 scratch; |
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u32 hw_curr; |
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struct list_head *entry; |
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struct ehci_qtd *td; |
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unsigned temp; |
|
unsigned size = *sizep; |
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char *next = *nextp; |
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char mark; |
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__le32 list_end = EHCI_LIST_END(ehci); |
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struct ehci_qh_hw *hw = qh->hw; |
|
|
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if (hw->hw_qtd_next == list_end) /* NEC does this */ |
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mark = '@'; |
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else |
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mark = token_mark(ehci, hw->hw_token); |
|
if (mark == '/') { /* qh_alt_next controls qh advance? */ |
|
if ((hw->hw_alt_next & QTD_MASK(ehci)) |
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== ehci->async->hw->hw_alt_next) |
|
mark = '#'; /* blocked */ |
|
else if (hw->hw_alt_next == list_end) |
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mark = '.'; /* use hw_qtd_next */ |
|
/* else alt_next points to some other qtd */ |
|
} |
|
scratch = hc32_to_cpup(ehci, &hw->hw_info1); |
|
hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; |
|
temp = scnprintf(next, size, |
|
"qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)" |
|
" [cur %08x next %08x buf[0] %08x]", |
|
qh, scratch & 0x007f, |
|
speed_char (scratch), |
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(scratch >> 8) & 0x000f, |
|
scratch, hc32_to_cpup(ehci, &hw->hw_info2), |
|
hc32_to_cpup(ehci, &hw->hw_token), mark, |
|
(cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) |
|
? "data1" : "data0", |
|
(hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f, |
|
hc32_to_cpup(ehci, &hw->hw_current), |
|
hc32_to_cpup(ehci, &hw->hw_qtd_next), |
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hc32_to_cpup(ehci, &hw->hw_buf[0])); |
|
size -= temp; |
|
next += temp; |
|
|
|
/* hc may be modifying the list as we read it ... */ |
|
list_for_each(entry, &qh->qtd_list) { |
|
char *type; |
|
|
|
td = list_entry(entry, struct ehci_qtd, qtd_list); |
|
scratch = hc32_to_cpup(ehci, &td->hw_token); |
|
mark = ' '; |
|
if (hw_curr == td->qtd_dma) { |
|
mark = '*'; |
|
} else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) { |
|
mark = '+'; |
|
} else if (QTD_LENGTH(scratch)) { |
|
if (td->hw_alt_next == ehci->async->hw->hw_alt_next) |
|
mark = '#'; |
|
else if (td->hw_alt_next != list_end) |
|
mark = '/'; |
|
} |
|
switch ((scratch >> 8) & 0x03) { |
|
case 0: |
|
type = "out"; |
|
break; |
|
case 1: |
|
type = "in"; |
|
break; |
|
case 2: |
|
type = "setup"; |
|
break; |
|
default: |
|
type = "?"; |
|
break; |
|
} |
|
temp = scnprintf(next, size, |
|
"\n\t%p%c%s len=%d %08x urb %p" |
|
" [td %08x buf[0] %08x]", |
|
td, mark, type, |
|
(scratch >> 16) & 0x7fff, |
|
scratch, |
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td->urb, |
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(u32) td->qtd_dma, |
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hc32_to_cpup(ehci, &td->hw_buf[0])); |
|
size -= temp; |
|
next += temp; |
|
if (temp == size) |
|
goto done; |
|
} |
|
|
|
temp = scnprintf(next, size, "\n"); |
|
size -= temp; |
|
next += temp; |
|
|
|
done: |
|
*sizep = size; |
|
*nextp = next; |
|
} |
|
|
|
static ssize_t fill_async_buffer(struct debug_buffer *buf) |
|
{ |
|
struct usb_hcd *hcd; |
|
struct ehci_hcd *ehci; |
|
unsigned long flags; |
|
unsigned temp, size; |
|
char *next; |
|
struct ehci_qh *qh; |
|
|
|
hcd = bus_to_hcd(buf->bus); |
|
ehci = hcd_to_ehci(hcd); |
|
next = buf->output_buf; |
|
size = buf->alloc_size; |
|
|
|
*next = 0; |
|
|
|
/* |
|
* dumps a snapshot of the async schedule. |
|
* usually empty except for long-term bulk reads, or head. |
|
* one QH per line, and TDs we know about |
|
*/ |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) |
|
qh_lines(ehci, qh, &next, &size); |
|
if (!list_empty(&ehci->async_unlink) && size > 0) { |
|
temp = scnprintf(next, size, "\nunlink =\n"); |
|
size -= temp; |
|
next += temp; |
|
|
|
list_for_each_entry(qh, &ehci->async_unlink, unlink_node) { |
|
if (size <= 0) |
|
break; |
|
qh_lines(ehci, qh, &next, &size); |
|
} |
|
} |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
|
|
return strlen(buf->output_buf); |
|
} |
|
|
|
static ssize_t fill_bandwidth_buffer(struct debug_buffer *buf) |
|
{ |
|
struct ehci_hcd *ehci; |
|
struct ehci_tt *tt; |
|
struct ehci_per_sched *ps; |
|
unsigned temp, size; |
|
char *next; |
|
unsigned i; |
|
u8 *bw; |
|
u16 *bf; |
|
u8 budget[EHCI_BANDWIDTH_SIZE]; |
|
|
|
ehci = hcd_to_ehci(bus_to_hcd(buf->bus)); |
|
next = buf->output_buf; |
|
size = buf->alloc_size; |
|
|
|
*next = 0; |
|
|
|
spin_lock_irq(&ehci->lock); |
|
|
|
/* Dump the HS bandwidth table */ |
|
temp = scnprintf(next, size, |
|
"HS bandwidth allocation (us per microframe)\n"); |
|
size -= temp; |
|
next += temp; |
|
for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) { |
|
bw = &ehci->bandwidth[i]; |
|
temp = scnprintf(next, size, |
|
"%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n", |
|
i, bw[0], bw[1], bw[2], bw[3], |
|
bw[4], bw[5], bw[6], bw[7]); |
|
size -= temp; |
|
next += temp; |
|
} |
|
|
|
/* Dump all the FS/LS tables */ |
|
list_for_each_entry(tt, &ehci->tt_list, tt_list) { |
|
temp = scnprintf(next, size, |
|
"\nTT %s port %d FS/LS bandwidth allocation (us per frame)\n", |
|
dev_name(&tt->usb_tt->hub->dev), |
|
tt->tt_port + !!tt->usb_tt->multi); |
|
size -= temp; |
|
next += temp; |
|
|
|
bf = tt->bandwidth; |
|
temp = scnprintf(next, size, |
|
" %5u%5u%5u%5u%5u%5u%5u%5u\n", |
|
bf[0], bf[1], bf[2], bf[3], |
|
bf[4], bf[5], bf[6], bf[7]); |
|
size -= temp; |
|
next += temp; |
|
|
|
temp = scnprintf(next, size, |
|
"FS/LS budget (us per microframe)\n"); |
|
size -= temp; |
|
next += temp; |
|
compute_tt_budget(budget, tt); |
|
for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) { |
|
bw = &budget[i]; |
|
temp = scnprintf(next, size, |
|
"%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n", |
|
i, bw[0], bw[1], bw[2], bw[3], |
|
bw[4], bw[5], bw[6], bw[7]); |
|
size -= temp; |
|
next += temp; |
|
} |
|
list_for_each_entry(ps, &tt->ps_list, ps_list) { |
|
temp = scnprintf(next, size, |
|
"%s ep %02x: %4u @ %2u.%u+%u mask %04x\n", |
|
dev_name(&ps->udev->dev), |
|
ps->ep->desc.bEndpointAddress, |
|
ps->tt_usecs, |
|
ps->bw_phase, ps->phase_uf, |
|
ps->bw_period, ps->cs_mask); |
|
size -= temp; |
|
next += temp; |
|
} |
|
} |
|
spin_unlock_irq(&ehci->lock); |
|
|
|
return next - buf->output_buf; |
|
} |
|
|
|
static unsigned output_buf_tds_dir(char *buf, struct ehci_hcd *ehci, |
|
struct ehci_qh_hw *hw, struct ehci_qh *qh, unsigned size) |
|
{ |
|
u32 scratch = hc32_to_cpup(ehci, &hw->hw_info1); |
|
struct ehci_qtd *qtd; |
|
char *type = ""; |
|
unsigned temp = 0; |
|
|
|
/* count tds, get ep direction */ |
|
list_for_each_entry(qtd, &qh->qtd_list, qtd_list) { |
|
temp++; |
|
switch ((hc32_to_cpu(ehci, qtd->hw_token) >> 8) & 0x03) { |
|
case 0: |
|
type = "out"; |
|
continue; |
|
case 1: |
|
type = "in"; |
|
continue; |
|
} |
|
} |
|
|
|
return scnprintf(buf, size, " (%c%d ep%d%s [%d/%d] q%d p%d)", |
|
speed_char(scratch), scratch & 0x007f, |
|
(scratch >> 8) & 0x000f, type, qh->ps.usecs, |
|
qh->ps.c_usecs, temp, 0x7ff & (scratch >> 16)); |
|
} |
|
|
|
#define DBG_SCHED_LIMIT 64 |
|
static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
|
{ |
|
struct usb_hcd *hcd; |
|
struct ehci_hcd *ehci; |
|
unsigned long flags; |
|
union ehci_shadow p, *seen; |
|
unsigned temp, size, seen_count; |
|
char *next; |
|
unsigned i; |
|
__hc32 tag; |
|
|
|
seen = kmalloc_array(DBG_SCHED_LIMIT, sizeof(*seen), GFP_ATOMIC); |
|
if (!seen) |
|
return 0; |
|
seen_count = 0; |
|
|
|
hcd = bus_to_hcd(buf->bus); |
|
ehci = hcd_to_ehci(hcd); |
|
next = buf->output_buf; |
|
size = buf->alloc_size; |
|
|
|
temp = scnprintf(next, size, "size = %d\n", ehci->periodic_size); |
|
size -= temp; |
|
next += temp; |
|
|
|
/* |
|
* dump a snapshot of the periodic schedule. |
|
* iso changes, interrupt usually doesn't. |
|
*/ |
|
spin_lock_irqsave(&ehci->lock, flags); |
|
for (i = 0; i < ehci->periodic_size; i++) { |
|
p = ehci->pshadow[i]; |
|
if (likely(!p.ptr)) |
|
continue; |
|
tag = Q_NEXT_TYPE(ehci, ehci->periodic[i]); |
|
|
|
temp = scnprintf(next, size, "%4d: ", i); |
|
size -= temp; |
|
next += temp; |
|
|
|
do { |
|
struct ehci_qh_hw *hw; |
|
|
|
switch (hc32_to_cpu(ehci, tag)) { |
|
case Q_TYPE_QH: |
|
hw = p.qh->hw; |
|
temp = scnprintf(next, size, " qh%d-%04x/%p", |
|
p.qh->ps.period, |
|
hc32_to_cpup(ehci, |
|
&hw->hw_info2) |
|
/* uframe masks */ |
|
& (QH_CMASK | QH_SMASK), |
|
p.qh); |
|
size -= temp; |
|
next += temp; |
|
/* don't repeat what follows this qh */ |
|
for (temp = 0; temp < seen_count; temp++) { |
|
if (seen[temp].ptr != p.ptr) |
|
continue; |
|
if (p.qh->qh_next.ptr) { |
|
temp = scnprintf(next, size, |
|
" ..."); |
|
size -= temp; |
|
next += temp; |
|
} |
|
break; |
|
} |
|
/* show more info the first time around */ |
|
if (temp == seen_count) { |
|
temp = output_buf_tds_dir(next, ehci, |
|
hw, p.qh, size); |
|
|
|
if (seen_count < DBG_SCHED_LIMIT) |
|
seen[seen_count++].qh = p.qh; |
|
} else { |
|
temp = 0; |
|
} |
|
tag = Q_NEXT_TYPE(ehci, hw->hw_next); |
|
p = p.qh->qh_next; |
|
break; |
|
case Q_TYPE_FSTN: |
|
temp = scnprintf(next, size, |
|
" fstn-%8x/%p", p.fstn->hw_prev, |
|
p.fstn); |
|
tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); |
|
p = p.fstn->fstn_next; |
|
break; |
|
case Q_TYPE_ITD: |
|
temp = scnprintf(next, size, |
|
" itd/%p", p.itd); |
|
tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); |
|
p = p.itd->itd_next; |
|
break; |
|
case Q_TYPE_SITD: |
|
temp = scnprintf(next, size, |
|
" sitd%d-%04x/%p", |
|
p.sitd->stream->ps.period, |
|
hc32_to_cpup(ehci, &p.sitd->hw_uframe) |
|
& 0x0000ffff, |
|
p.sitd); |
|
tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); |
|
p = p.sitd->sitd_next; |
|
break; |
|
} |
|
size -= temp; |
|
next += temp; |
|
} while (p.ptr); |
|
|
|
temp = scnprintf(next, size, "\n"); |
|
size -= temp; |
|
next += temp; |
|
} |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
kfree(seen); |
|
|
|
return buf->alloc_size - size; |
|
} |
|
#undef DBG_SCHED_LIMIT |
|
|
|
static const char *rh_state_string(struct ehci_hcd *ehci) |
|
{ |
|
switch (ehci->rh_state) { |
|
case EHCI_RH_HALTED: |
|
return "halted"; |
|
case EHCI_RH_SUSPENDED: |
|
return "suspended"; |
|
case EHCI_RH_RUNNING: |
|
return "running"; |
|
case EHCI_RH_STOPPING: |
|
return "stopping"; |
|
} |
|
return "?"; |
|
} |
|
|
|
static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
|
{ |
|
struct usb_hcd *hcd; |
|
struct ehci_hcd *ehci; |
|
unsigned long flags; |
|
unsigned temp, size, i; |
|
char *next, scratch[80]; |
|
static char fmt[] = "%*s\n"; |
|
static char label[] = ""; |
|
|
|
hcd = bus_to_hcd(buf->bus); |
|
ehci = hcd_to_ehci(hcd); |
|
next = buf->output_buf; |
|
size = buf->alloc_size; |
|
|
|
spin_lock_irqsave(&ehci->lock, flags); |
|
|
|
if (!HCD_HW_ACCESSIBLE(hcd)) { |
|
size = scnprintf(next, size, |
|
"bus %s, device %s\n" |
|
"%s\n" |
|
"SUSPENDED (no register access)\n", |
|
hcd->self.controller->bus->name, |
|
dev_name(hcd->self.controller), |
|
hcd->product_desc); |
|
goto done; |
|
} |
|
|
|
/* Capability Registers */ |
|
i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
|
temp = scnprintf(next, size, |
|
"bus %s, device %s\n" |
|
"%s\n" |
|
"EHCI %x.%02x, rh state %s\n", |
|
hcd->self.controller->bus->name, |
|
dev_name(hcd->self.controller), |
|
hcd->product_desc, |
|
i >> 8, i & 0x0ff, rh_state_string(ehci)); |
|
size -= temp; |
|
next += temp; |
|
|
|
#ifdef CONFIG_USB_PCI |
|
/* EHCI 0.96 and later may have "extended capabilities" */ |
|
if (dev_is_pci(hcd->self.controller)) { |
|
struct pci_dev *pdev; |
|
u32 offset, cap, cap2; |
|
unsigned count = 256 / 4; |
|
|
|
pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); |
|
offset = HCC_EXT_CAPS(ehci_readl(ehci, |
|
&ehci->caps->hcc_params)); |
|
while (offset && count--) { |
|
pci_read_config_dword(pdev, offset, &cap); |
|
switch (cap & 0xff) { |
|
case 1: |
|
temp = scnprintf(next, size, |
|
"ownership %08x%s%s\n", cap, |
|
(cap & (1 << 24)) ? " linux" : "", |
|
(cap & (1 << 16)) ? " firmware" : ""); |
|
size -= temp; |
|
next += temp; |
|
|
|
offset += 4; |
|
pci_read_config_dword(pdev, offset, &cap2); |
|
temp = scnprintf(next, size, |
|
"SMI sts/enable 0x%08x\n", cap2); |
|
size -= temp; |
|
next += temp; |
|
break; |
|
case 0: /* illegal reserved capability */ |
|
cap = 0; |
|
fallthrough; |
|
default: /* unknown */ |
|
break; |
|
} |
|
offset = (cap >> 8) & 0xff; |
|
} |
|
} |
|
#endif |
|
|
|
/* FIXME interpret both types of params */ |
|
i = ehci_readl(ehci, &ehci->caps->hcs_params); |
|
temp = scnprintf(next, size, "structural params 0x%08x\n", i); |
|
size -= temp; |
|
next += temp; |
|
|
|
i = ehci_readl(ehci, &ehci->caps->hcc_params); |
|
temp = scnprintf(next, size, "capability params 0x%08x\n", i); |
|
size -= temp; |
|
next += temp; |
|
|
|
/* Operational Registers */ |
|
temp = dbg_status_buf(scratch, sizeof(scratch), label, |
|
ehci_readl(ehci, &ehci->regs->status)); |
|
temp = scnprintf(next, size, fmt, temp, scratch); |
|
size -= temp; |
|
next += temp; |
|
|
|
temp = dbg_command_buf(scratch, sizeof(scratch), label, |
|
ehci_readl(ehci, &ehci->regs->command)); |
|
temp = scnprintf(next, size, fmt, temp, scratch); |
|
size -= temp; |
|
next += temp; |
|
|
|
temp = dbg_intr_buf(scratch, sizeof(scratch), label, |
|
ehci_readl(ehci, &ehci->regs->intr_enable)); |
|
temp = scnprintf(next, size, fmt, temp, scratch); |
|
size -= temp; |
|
next += temp; |
|
|
|
temp = scnprintf(next, size, "uframe %04x\n", |
|
ehci_read_frame_index(ehci)); |
|
size -= temp; |
|
next += temp; |
|
|
|
for (i = 1; i <= HCS_N_PORTS(ehci->hcs_params); i++) { |
|
temp = dbg_port_buf(scratch, sizeof(scratch), label, i, |
|
ehci_readl(ehci, |
|
&ehci->regs->port_status[i - 1])); |
|
temp = scnprintf(next, size, fmt, temp, scratch); |
|
size -= temp; |
|
next += temp; |
|
if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { |
|
temp = scnprintf(next, size, |
|
" debug control %08x\n", |
|
ehci_readl(ehci, |
|
&ehci->debug->control)); |
|
size -= temp; |
|
next += temp; |
|
} |
|
} |
|
|
|
if (!list_empty(&ehci->async_unlink)) { |
|
temp = scnprintf(next, size, "async unlink qh %p\n", |
|
list_first_entry(&ehci->async_unlink, |
|
struct ehci_qh, unlink_node)); |
|
size -= temp; |
|
next += temp; |
|
} |
|
|
|
#ifdef EHCI_STATS |
|
temp = scnprintf(next, size, |
|
"irq normal %ld err %ld iaa %ld (lost %ld)\n", |
|
ehci->stats.normal, ehci->stats.error, ehci->stats.iaa, |
|
ehci->stats.lost_iaa); |
|
size -= temp; |
|
next += temp; |
|
|
|
temp = scnprintf(next, size, "complete %ld unlink %ld\n", |
|
ehci->stats.complete, ehci->stats.unlink); |
|
size -= temp; |
|
next += temp; |
|
#endif |
|
|
|
done: |
|
spin_unlock_irqrestore(&ehci->lock, flags); |
|
|
|
return buf->alloc_size - size; |
|
} |
|
|
|
static struct debug_buffer *alloc_buffer(struct usb_bus *bus, |
|
ssize_t (*fill_func)(struct debug_buffer *)) |
|
{ |
|
struct debug_buffer *buf; |
|
|
|
buf = kzalloc(sizeof(*buf), GFP_KERNEL); |
|
|
|
if (buf) { |
|
buf->bus = bus; |
|
buf->fill_func = fill_func; |
|
mutex_init(&buf->mutex); |
|
buf->alloc_size = PAGE_SIZE; |
|
} |
|
|
|
return buf; |
|
} |
|
|
|
static int fill_buffer(struct debug_buffer *buf) |
|
{ |
|
int ret = 0; |
|
|
|
if (!buf->output_buf) |
|
buf->output_buf = vmalloc(buf->alloc_size); |
|
|
|
if (!buf->output_buf) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
ret = buf->fill_func(buf); |
|
|
|
if (ret >= 0) { |
|
buf->count = ret; |
|
ret = 0; |
|
} |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
static ssize_t debug_output(struct file *file, char __user *user_buf, |
|
size_t len, loff_t *offset) |
|
{ |
|
struct debug_buffer *buf = file->private_data; |
|
int ret = 0; |
|
|
|
mutex_lock(&buf->mutex); |
|
if (buf->count == 0) { |
|
ret = fill_buffer(buf); |
|
if (ret != 0) { |
|
mutex_unlock(&buf->mutex); |
|
goto out; |
|
} |
|
} |
|
mutex_unlock(&buf->mutex); |
|
|
|
ret = simple_read_from_buffer(user_buf, len, offset, |
|
buf->output_buf, buf->count); |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
static int debug_close(struct inode *inode, struct file *file) |
|
{ |
|
struct debug_buffer *buf = file->private_data; |
|
|
|
if (buf) { |
|
vfree(buf->output_buf); |
|
kfree(buf); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int debug_async_open(struct inode *inode, struct file *file) |
|
{ |
|
file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); |
|
|
|
return file->private_data ? 0 : -ENOMEM; |
|
} |
|
|
|
static int debug_bandwidth_open(struct inode *inode, struct file *file) |
|
{ |
|
file->private_data = alloc_buffer(inode->i_private, |
|
fill_bandwidth_buffer); |
|
|
|
return file->private_data ? 0 : -ENOMEM; |
|
} |
|
|
|
static int debug_periodic_open(struct inode *inode, struct file *file) |
|
{ |
|
struct debug_buffer *buf; |
|
|
|
buf = alloc_buffer(inode->i_private, fill_periodic_buffer); |
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8) * PAGE_SIZE; |
|
file->private_data = buf; |
|
return 0; |
|
} |
|
|
|
static int debug_registers_open(struct inode *inode, struct file *file) |
|
{ |
|
file->private_data = alloc_buffer(inode->i_private, |
|
fill_registers_buffer); |
|
|
|
return file->private_data ? 0 : -ENOMEM; |
|
} |
|
|
|
static inline void create_debug_files(struct ehci_hcd *ehci) |
|
{ |
|
struct usb_bus *bus = &ehci_to_hcd(ehci)->self; |
|
|
|
ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); |
|
|
|
debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, |
|
&debug_async_fops); |
|
debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus, |
|
&debug_bandwidth_fops); |
|
debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, |
|
&debug_periodic_fops); |
|
debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, |
|
&debug_registers_fops); |
|
} |
|
|
|
static inline void remove_debug_files(struct ehci_hcd *ehci) |
|
{ |
|
debugfs_remove_recursive(ehci->debug_dir); |
|
} |
|
|
|
#else /* CONFIG_DYNAMIC_DEBUG */ |
|
|
|
static inline void dbg_hcs_params(struct ehci_hcd *ehci, char *label) { } |
|
static inline void dbg_hcc_params(struct ehci_hcd *ehci, char *label) { } |
|
|
|
static inline void __maybe_unused dbg_qh(const char *label, |
|
struct ehci_hcd *ehci, struct ehci_qh *qh) { } |
|
|
|
static inline int __maybe_unused dbg_status_buf(const char *buf, |
|
unsigned int len, const char *label, u32 status) |
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{ return 0; } |
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static inline int __maybe_unused dbg_command_buf(const char *buf, |
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unsigned int len, const char *label, u32 command) |
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{ return 0; } |
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static inline int __maybe_unused dbg_intr_buf(const char *buf, |
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unsigned int len, const char *label, u32 enable) |
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{ return 0; } |
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static inline int __maybe_unused dbg_port_buf(char *buf, |
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unsigned int len, const char *label, int port, u32 status) |
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{ return 0; } |
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static inline void dbg_status(struct ehci_hcd *ehci, const char *label, |
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u32 status) { } |
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static inline void dbg_cmd(struct ehci_hcd *ehci, const char *label, |
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u32 command) { } |
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static inline void dbg_port(struct ehci_hcd *ehci, const char *label, |
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int port, u32 status) { } |
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static inline void create_debug_files(struct ehci_hcd *bus) { } |
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static inline void remove_debug_files(struct ehci_hcd *bus) { } |
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#endif /* CONFIG_DYNAMIC_DEBUG */
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