575 lines
17 KiB
C
575 lines
17 KiB
C
/*
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* xHCI host controller driver
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*
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* Copyright (C) 2008 Intel Corp.
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*
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* Author: Sarah Sharp
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* Some code borrowed from the Linux EHCI driver.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "xhci.h"
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#define XHCI_INIT_VALUE 0x0
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/* Add verbose debugging later, just print everything for now */
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void xhci_dbg_regs(struct xhci_hcd *xhci)
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{
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u32 temp;
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xhci_dbg(xhci, "// xHCI capability registers at %p:\n",
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xhci->cap_regs);
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temp = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
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xhci_dbg(xhci, "// @%p = 0x%x (CAPLENGTH AND HCIVERSION)\n",
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&xhci->cap_regs->hc_capbase, temp);
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xhci_dbg(xhci, "// CAPLENGTH: 0x%x\n",
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(unsigned int) HC_LENGTH(temp));
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#if 0
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xhci_dbg(xhci, "// HCIVERSION: 0x%x\n",
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(unsigned int) HC_VERSION(temp));
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#endif
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xhci_dbg(xhci, "// xHCI operational registers at %p:\n", xhci->op_regs);
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temp = xhci_readl(xhci, &xhci->cap_regs->run_regs_off);
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xhci_dbg(xhci, "// @%p = 0x%x RTSOFF\n",
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&xhci->cap_regs->run_regs_off,
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(unsigned int) temp & RTSOFF_MASK);
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xhci_dbg(xhci, "// xHCI runtime registers at %p:\n", xhci->run_regs);
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temp = xhci_readl(xhci, &xhci->cap_regs->db_off);
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xhci_dbg(xhci, "// @%p = 0x%x DBOFF\n", &xhci->cap_regs->db_off, temp);
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xhci_dbg(xhci, "// Doorbell array at %p:\n", xhci->dba);
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}
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static void xhci_print_cap_regs(struct xhci_hcd *xhci)
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{
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u32 temp;
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xhci_dbg(xhci, "xHCI capability registers at %p:\n", xhci->cap_regs);
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temp = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
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xhci_dbg(xhci, "CAPLENGTH AND HCIVERSION 0x%x:\n",
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(unsigned int) temp);
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xhci_dbg(xhci, "CAPLENGTH: 0x%x\n",
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(unsigned int) HC_LENGTH(temp));
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xhci_dbg(xhci, "HCIVERSION: 0x%x\n",
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(unsigned int) HC_VERSION(temp));
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temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
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xhci_dbg(xhci, "HCSPARAMS 1: 0x%x\n",
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(unsigned int) temp);
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xhci_dbg(xhci, " Max device slots: %u\n",
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(unsigned int) HCS_MAX_SLOTS(temp));
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xhci_dbg(xhci, " Max interrupters: %u\n",
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(unsigned int) HCS_MAX_INTRS(temp));
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xhci_dbg(xhci, " Max ports: %u\n",
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(unsigned int) HCS_MAX_PORTS(temp));
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temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
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xhci_dbg(xhci, "HCSPARAMS 2: 0x%x\n",
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(unsigned int) temp);
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xhci_dbg(xhci, " Isoc scheduling threshold: %u\n",
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(unsigned int) HCS_IST(temp));
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xhci_dbg(xhci, " Maximum allowed segments in event ring: %u\n",
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(unsigned int) HCS_ERST_MAX(temp));
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temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
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xhci_dbg(xhci, "HCSPARAMS 3 0x%x:\n",
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(unsigned int) temp);
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xhci_dbg(xhci, " Worst case U1 device exit latency: %u\n",
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(unsigned int) HCS_U1_LATENCY(temp));
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xhci_dbg(xhci, " Worst case U2 device exit latency: %u\n",
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(unsigned int) HCS_U2_LATENCY(temp));
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temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
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xhci_dbg(xhci, "HCC PARAMS 0x%x:\n", (unsigned int) temp);
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xhci_dbg(xhci, " HC generates %s bit addresses\n",
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HCC_64BIT_ADDR(temp) ? "64" : "32");
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/* FIXME */
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xhci_dbg(xhci, " FIXME: more HCCPARAMS debugging\n");
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temp = xhci_readl(xhci, &xhci->cap_regs->run_regs_off);
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xhci_dbg(xhci, "RTSOFF 0x%x:\n", temp & RTSOFF_MASK);
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}
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static void xhci_print_command_reg(struct xhci_hcd *xhci)
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{
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u32 temp;
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temp = xhci_readl(xhci, &xhci->op_regs->command);
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xhci_dbg(xhci, "USBCMD 0x%x:\n", temp);
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xhci_dbg(xhci, " HC is %s\n",
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(temp & CMD_RUN) ? "running" : "being stopped");
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xhci_dbg(xhci, " HC has %sfinished hard reset\n",
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(temp & CMD_RESET) ? "not " : "");
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xhci_dbg(xhci, " Event Interrupts %s\n",
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(temp & CMD_EIE) ? "enabled " : "disabled");
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xhci_dbg(xhci, " Host System Error Interrupts %s\n",
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(temp & CMD_EIE) ? "enabled " : "disabled");
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xhci_dbg(xhci, " HC has %sfinished light reset\n",
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(temp & CMD_LRESET) ? "not " : "");
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}
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static void xhci_print_status(struct xhci_hcd *xhci)
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{
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u32 temp;
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temp = xhci_readl(xhci, &xhci->op_regs->status);
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xhci_dbg(xhci, "USBSTS 0x%x:\n", temp);
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xhci_dbg(xhci, " Event ring is %sempty\n",
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(temp & STS_EINT) ? "not " : "");
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xhci_dbg(xhci, " %sHost System Error\n",
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(temp & STS_FATAL) ? "WARNING: " : "No ");
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xhci_dbg(xhci, " HC is %s\n",
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(temp & STS_HALT) ? "halted" : "running");
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}
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static void xhci_print_op_regs(struct xhci_hcd *xhci)
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{
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xhci_dbg(xhci, "xHCI operational registers at %p:\n", xhci->op_regs);
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xhci_print_command_reg(xhci);
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xhci_print_status(xhci);
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}
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static void xhci_print_ports(struct xhci_hcd *xhci)
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{
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u32 __iomem *addr;
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int i, j;
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int ports;
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char *names[NUM_PORT_REGS] = {
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"status",
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"power",
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"link",
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"reserved",
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};
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ports = HCS_MAX_PORTS(xhci->hcs_params1);
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addr = &xhci->op_regs->port_status_base;
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for (i = 0; i < ports; i++) {
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for (j = 0; j < NUM_PORT_REGS; ++j) {
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xhci_dbg(xhci, "%p port %s reg = 0x%x\n",
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addr, names[j],
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(unsigned int) xhci_readl(xhci, addr));
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addr++;
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}
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}
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}
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void xhci_print_ir_set(struct xhci_hcd *xhci, struct xhci_intr_reg *ir_set, int set_num)
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{
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void *addr;
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u32 temp;
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u64 temp_64;
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addr = &ir_set->irq_pending;
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temp = xhci_readl(xhci, addr);
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if (temp == XHCI_INIT_VALUE)
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return;
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xhci_dbg(xhci, " %p: ir_set[%i]\n", ir_set, set_num);
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xhci_dbg(xhci, " %p: ir_set.pending = 0x%x\n", addr,
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(unsigned int)temp);
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addr = &ir_set->irq_control;
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temp = xhci_readl(xhci, addr);
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xhci_dbg(xhci, " %p: ir_set.control = 0x%x\n", addr,
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(unsigned int)temp);
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addr = &ir_set->erst_size;
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temp = xhci_readl(xhci, addr);
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xhci_dbg(xhci, " %p: ir_set.erst_size = 0x%x\n", addr,
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(unsigned int)temp);
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addr = &ir_set->rsvd;
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temp = xhci_readl(xhci, addr);
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if (temp != XHCI_INIT_VALUE)
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xhci_dbg(xhci, " WARN: %p: ir_set.rsvd = 0x%x\n",
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addr, (unsigned int)temp);
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addr = &ir_set->erst_base;
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temp_64 = xhci_read_64(xhci, addr);
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xhci_dbg(xhci, " %p: ir_set.erst_base = @%08llx\n",
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addr, temp_64);
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addr = &ir_set->erst_dequeue;
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temp_64 = xhci_read_64(xhci, addr);
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xhci_dbg(xhci, " %p: ir_set.erst_dequeue = @%08llx\n",
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addr, temp_64);
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}
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void xhci_print_run_regs(struct xhci_hcd *xhci)
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{
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u32 temp;
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int i;
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xhci_dbg(xhci, "xHCI runtime registers at %p:\n", xhci->run_regs);
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temp = xhci_readl(xhci, &xhci->run_regs->microframe_index);
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xhci_dbg(xhci, " %p: Microframe index = 0x%x\n",
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&xhci->run_regs->microframe_index,
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(unsigned int) temp);
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for (i = 0; i < 7; ++i) {
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temp = xhci_readl(xhci, &xhci->run_regs->rsvd[i]);
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if (temp != XHCI_INIT_VALUE)
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xhci_dbg(xhci, " WARN: %p: Rsvd[%i] = 0x%x\n",
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&xhci->run_regs->rsvd[i],
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i, (unsigned int) temp);
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}
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}
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void xhci_print_registers(struct xhci_hcd *xhci)
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{
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xhci_print_cap_regs(xhci);
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xhci_print_op_regs(xhci);
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xhci_print_ports(xhci);
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}
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void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb)
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{
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int i;
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for (i = 0; i < 4; ++i)
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xhci_dbg(xhci, "Offset 0x%x = 0x%x\n",
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i*4, trb->generic.field[i]);
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}
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/**
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* Debug a transfer request block (TRB).
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*/
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void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
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{
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u64 address;
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u32 type = xhci_readl(xhci, &trb->link.control) & TRB_TYPE_BITMASK;
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switch (type) {
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case TRB_TYPE(TRB_LINK):
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xhci_dbg(xhci, "Link TRB:\n");
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xhci_print_trb_offsets(xhci, trb);
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address = trb->link.segment_ptr;
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xhci_dbg(xhci, "Next ring segment DMA address = 0x%llx\n", address);
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xhci_dbg(xhci, "Interrupter target = 0x%x\n",
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GET_INTR_TARGET(trb->link.intr_target));
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xhci_dbg(xhci, "Cycle bit = %u\n",
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(unsigned int) (trb->link.control & TRB_CYCLE));
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xhci_dbg(xhci, "Toggle cycle bit = %u\n",
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(unsigned int) (trb->link.control & LINK_TOGGLE));
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xhci_dbg(xhci, "No Snoop bit = %u\n",
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(unsigned int) (trb->link.control & TRB_NO_SNOOP));
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break;
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case TRB_TYPE(TRB_TRANSFER):
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address = trb->trans_event.buffer;
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/*
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* FIXME: look at flags to figure out if it's an address or if
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* the data is directly in the buffer field.
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*/
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xhci_dbg(xhci, "DMA address or buffer contents= %llu\n", address);
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break;
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case TRB_TYPE(TRB_COMPLETION):
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address = trb->event_cmd.cmd_trb;
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xhci_dbg(xhci, "Command TRB pointer = %llu\n", address);
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xhci_dbg(xhci, "Completion status = %u\n",
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(unsigned int) GET_COMP_CODE(trb->event_cmd.status));
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xhci_dbg(xhci, "Flags = 0x%x\n", (unsigned int) trb->event_cmd.flags);
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break;
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default:
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xhci_dbg(xhci, "Unknown TRB with TRB type ID %u\n",
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(unsigned int) type>>10);
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xhci_print_trb_offsets(xhci, trb);
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break;
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}
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}
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/**
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* Debug a segment with an xHCI ring.
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*
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* @return The Link TRB of the segment, or NULL if there is no Link TRB
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* (which is a bug, since all segments must have a Link TRB).
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*
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* Prints out all TRBs in the segment, even those after the Link TRB.
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*
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* XXX: should we print out TRBs that the HC owns? As long as we don't
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* write, that should be fine... We shouldn't expect that the memory pointed to
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* by the TRB is valid at all. Do we care about ones the HC owns? Probably,
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* for HC debugging.
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*/
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void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg)
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{
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int i;
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u32 addr = (u32) seg->dma;
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union xhci_trb *trb = seg->trbs;
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for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
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trb = &seg->trbs[i];
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xhci_dbg(xhci, "@%08x %08x %08x %08x %08x\n", addr,
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lower_32_bits(trb->link.segment_ptr),
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upper_32_bits(trb->link.segment_ptr),
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(unsigned int) trb->link.intr_target,
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(unsigned int) trb->link.control);
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addr += sizeof(*trb);
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}
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}
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void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring)
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{
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xhci_dbg(xhci, "Ring deq = %p (virt), 0x%llx (dma)\n",
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ring->dequeue,
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(unsigned long long)xhci_trb_virt_to_dma(ring->deq_seg,
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ring->dequeue));
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xhci_dbg(xhci, "Ring deq updated %u times\n",
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ring->deq_updates);
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xhci_dbg(xhci, "Ring enq = %p (virt), 0x%llx (dma)\n",
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ring->enqueue,
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(unsigned long long)xhci_trb_virt_to_dma(ring->enq_seg,
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ring->enqueue));
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xhci_dbg(xhci, "Ring enq updated %u times\n",
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ring->enq_updates);
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}
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/**
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* Debugging for an xHCI ring, which is a queue broken into multiple segments.
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*
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* Print out each segment in the ring. Check that the DMA address in
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* each link segment actually matches the segment's stored DMA address.
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* Check that the link end bit is only set at the end of the ring.
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* Check that the dequeue and enqueue pointers point to real data in this ring
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* (not some other ring).
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*/
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void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring)
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{
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/* FIXME: Throw an error if any segment doesn't have a Link TRB */
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struct xhci_segment *seg;
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struct xhci_segment *first_seg = ring->first_seg;
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xhci_debug_segment(xhci, first_seg);
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if (!ring->enq_updates && !ring->deq_updates) {
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xhci_dbg(xhci, " Ring has not been updated\n");
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return;
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}
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for (seg = first_seg->next; seg != first_seg; seg = seg->next)
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xhci_debug_segment(xhci, seg);
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}
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void xhci_dbg_ep_rings(struct xhci_hcd *xhci,
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unsigned int slot_id, unsigned int ep_index,
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struct xhci_virt_ep *ep)
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{
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int i;
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struct xhci_ring *ring;
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if (ep->ep_state & EP_HAS_STREAMS) {
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for (i = 1; i < ep->stream_info->num_streams; i++) {
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ring = ep->stream_info->stream_rings[i];
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xhci_dbg(xhci, "Dev %d endpoint %d stream ID %d:\n",
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slot_id, ep_index, i);
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xhci_debug_segment(xhci, ring->deq_seg);
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}
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} else {
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ring = ep->ring;
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if (!ring)
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return;
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xhci_dbg(xhci, "Dev %d endpoint ring %d:\n",
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slot_id, ep_index);
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xhci_debug_segment(xhci, ring->deq_seg);
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}
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}
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void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
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{
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u32 addr = (u32) erst->erst_dma_addr;
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int i;
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struct xhci_erst_entry *entry;
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for (i = 0; i < erst->num_entries; ++i) {
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entry = &erst->entries[i];
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xhci_dbg(xhci, "@%08x %08x %08x %08x %08x\n",
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(unsigned int) addr,
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lower_32_bits(entry->seg_addr),
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upper_32_bits(entry->seg_addr),
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(unsigned int) entry->seg_size,
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(unsigned int) entry->rsvd);
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addr += sizeof(*entry);
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}
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}
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void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci)
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{
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u64 val;
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val = xhci_read_64(xhci, &xhci->op_regs->cmd_ring);
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xhci_dbg(xhci, "// xHC command ring deq ptr low bits + flags = @%08x\n",
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lower_32_bits(val));
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xhci_dbg(xhci, "// xHC command ring deq ptr high bits = @%08x\n",
|
|
upper_32_bits(val));
|
|
}
|
|
|
|
/* Print the last 32 bytes for 64-byte contexts */
|
|
static void dbg_rsvd64(struct xhci_hcd *xhci, u64 *ctx, dma_addr_t dma)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 4; ++i) {
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx "
|
|
"(dma) %#08llx - rsvd64[%d]\n",
|
|
&ctx[4 + i], (unsigned long long)dma,
|
|
ctx[4 + i], i);
|
|
dma += 8;
|
|
}
|
|
}
|
|
|
|
char *xhci_get_slot_state(struct xhci_hcd *xhci,
|
|
struct xhci_container_ctx *ctx)
|
|
{
|
|
struct xhci_slot_ctx *slot_ctx = xhci_get_slot_ctx(xhci, ctx);
|
|
|
|
switch (GET_SLOT_STATE(slot_ctx->dev_state)) {
|
|
case 0:
|
|
return "enabled/disabled";
|
|
case 1:
|
|
return "default";
|
|
case 2:
|
|
return "addressed";
|
|
case 3:
|
|
return "configured";
|
|
default:
|
|
return "reserved";
|
|
}
|
|
}
|
|
|
|
void xhci_dbg_slot_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx)
|
|
{
|
|
/* Fields are 32 bits wide, DMA addresses are in bytes */
|
|
int field_size = 32 / 8;
|
|
int i;
|
|
|
|
struct xhci_slot_ctx *slot_ctx = xhci_get_slot_ctx(xhci, ctx);
|
|
dma_addr_t dma = ctx->dma +
|
|
((unsigned long)slot_ctx - (unsigned long)ctx->bytes);
|
|
int csz = HCC_64BYTE_CONTEXT(xhci->hcc_params);
|
|
|
|
xhci_dbg(xhci, "Slot Context:\n");
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_info\n",
|
|
&slot_ctx->dev_info,
|
|
(unsigned long long)dma, slot_ctx->dev_info);
|
|
dma += field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_info2\n",
|
|
&slot_ctx->dev_info2,
|
|
(unsigned long long)dma, slot_ctx->dev_info2);
|
|
dma += field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - tt_info\n",
|
|
&slot_ctx->tt_info,
|
|
(unsigned long long)dma, slot_ctx->tt_info);
|
|
dma += field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_state\n",
|
|
&slot_ctx->dev_state,
|
|
(unsigned long long)dma, slot_ctx->dev_state);
|
|
dma += field_size;
|
|
for (i = 0; i < 4; ++i) {
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
|
|
&slot_ctx->reserved[i], (unsigned long long)dma,
|
|
slot_ctx->reserved[i], i);
|
|
dma += field_size;
|
|
}
|
|
|
|
if (csz)
|
|
dbg_rsvd64(xhci, (u64 *)slot_ctx, dma);
|
|
}
|
|
|
|
void xhci_dbg_ep_ctx(struct xhci_hcd *xhci,
|
|
struct xhci_container_ctx *ctx,
|
|
unsigned int last_ep)
|
|
{
|
|
int i, j;
|
|
int last_ep_ctx = 31;
|
|
/* Fields are 32 bits wide, DMA addresses are in bytes */
|
|
int field_size = 32 / 8;
|
|
int csz = HCC_64BYTE_CONTEXT(xhci->hcc_params);
|
|
|
|
if (last_ep < 31)
|
|
last_ep_ctx = last_ep + 1;
|
|
for (i = 0; i < last_ep_ctx; ++i) {
|
|
struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, ctx, i);
|
|
dma_addr_t dma = ctx->dma +
|
|
((unsigned long)ep_ctx - (unsigned long)ctx->bytes);
|
|
|
|
xhci_dbg(xhci, "Endpoint %02d Context:\n", i);
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info\n",
|
|
&ep_ctx->ep_info,
|
|
(unsigned long long)dma, ep_ctx->ep_info);
|
|
dma += field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info2\n",
|
|
&ep_ctx->ep_info2,
|
|
(unsigned long long)dma, ep_ctx->ep_info2);
|
|
dma += field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08llx - deq\n",
|
|
&ep_ctx->deq,
|
|
(unsigned long long)dma, ep_ctx->deq);
|
|
dma += 2*field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - tx_info\n",
|
|
&ep_ctx->tx_info,
|
|
(unsigned long long)dma, ep_ctx->tx_info);
|
|
dma += field_size;
|
|
for (j = 0; j < 3; ++j) {
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
|
|
&ep_ctx->reserved[j],
|
|
(unsigned long long)dma,
|
|
ep_ctx->reserved[j], j);
|
|
dma += field_size;
|
|
}
|
|
|
|
if (csz)
|
|
dbg_rsvd64(xhci, (u64 *)ep_ctx, dma);
|
|
}
|
|
}
|
|
|
|
void xhci_dbg_ctx(struct xhci_hcd *xhci,
|
|
struct xhci_container_ctx *ctx,
|
|
unsigned int last_ep)
|
|
{
|
|
int i;
|
|
/* Fields are 32 bits wide, DMA addresses are in bytes */
|
|
int field_size = 32 / 8;
|
|
struct xhci_slot_ctx *slot_ctx;
|
|
dma_addr_t dma = ctx->dma;
|
|
int csz = HCC_64BYTE_CONTEXT(xhci->hcc_params);
|
|
|
|
if (ctx->type == XHCI_CTX_TYPE_INPUT) {
|
|
struct xhci_input_control_ctx *ctrl_ctx =
|
|
xhci_get_input_control_ctx(xhci, ctx);
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - drop flags\n",
|
|
&ctrl_ctx->drop_flags, (unsigned long long)dma,
|
|
ctrl_ctx->drop_flags);
|
|
dma += field_size;
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - add flags\n",
|
|
&ctrl_ctx->add_flags, (unsigned long long)dma,
|
|
ctrl_ctx->add_flags);
|
|
dma += field_size;
|
|
for (i = 0; i < 6; ++i) {
|
|
xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd2[%d]\n",
|
|
&ctrl_ctx->rsvd2[i], (unsigned long long)dma,
|
|
ctrl_ctx->rsvd2[i], i);
|
|
dma += field_size;
|
|
}
|
|
|
|
if (csz)
|
|
dbg_rsvd64(xhci, (u64 *)ctrl_ctx, dma);
|
|
}
|
|
|
|
slot_ctx = xhci_get_slot_ctx(xhci, ctx);
|
|
xhci_dbg_slot_ctx(xhci, ctx);
|
|
xhci_dbg_ep_ctx(xhci, ctx, last_ep);
|
|
}
|