| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2006 Eric Biederman (ebiederm@xmission.com) |
| * Copyright (C) 2007 AMD |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA |
| */ |
| |
| #include <stddef.h> |
| #include <console/console.h> |
| #include <arch/io.h> |
| #include <device/pci.h> |
| #include <arch/byteorder.h> |
| #include <cpu/x86/car.h> |
| #include <string.h> |
| |
| #include <usb_ch9.h> |
| #include <ehci.h> |
| #include <usbdebug.h> |
| |
| |
| #define DBGP_EP_VALID (1<<0) |
| #define DBGP_EP_ENABLED (1<<1) |
| #define DBGP_EP_STATMASK (DBGP_EP_VALID | DBGP_EP_ENABLED) |
| |
| struct dbgp_pipe |
| { |
| u8 endpoint; |
| u8 status; |
| u8 bufidx; |
| char buf[8]; |
| }; |
| |
| #define DBGP_MAX_ENDPOINTS 4 |
| #define DBGP_CONSOLE_EPOUT 0 |
| #define DBGP_CONSOLE_EPIN 1 |
| |
| struct ehci_debug_info { |
| u8 devnum; |
| |
| void *ehci_caps; |
| void *ehci_regs; |
| void *ehci_debug; |
| |
| struct dbgp_pipe ep_pipe[DBGP_MAX_ENDPOINTS]; |
| }; |
| |
| /* Set this to 1 to debug the start-up of EHCI debug port hardware. You need |
| * to modify console_init() to initialise some other console before usbdebug |
| * to receive the printk lines from here. |
| * There will be no real usbdebug console output while DBGP_DEBUG is set. |
| */ |
| #define DBGP_DEBUG 0 |
| #if DBGP_DEBUG |
| # define dbgp_printk(fmt_arg...) printk(BIOS_DEBUG, fmt_arg) |
| #else |
| #define dbgp_printk(fmt_arg...) do {} while(0) |
| #endif |
| |
| |
| #define USB_DEBUG_DEVNUM 127 |
| |
| #define DBGP_DATA_TOGGLE 0x8800 |
| #define DBGP_PID_UPDATE(x, tok) \ |
| ((((x) ^ DBGP_DATA_TOGGLE) & 0xffff00) | ((tok) & 0xff)) |
| |
| #define DBGP_LEN_UPDATE(x, len) (((x) & ~0x0f) | ((len) & 0x0f)) |
| /* |
| * USB Packet IDs (PIDs) |
| */ |
| |
| /* token */ |
| #define USB_PID_OUT 0xe1 |
| #define USB_PID_IN 0x69 |
| #define USB_PID_SOF 0xa5 |
| #define USB_PID_SETUP 0x2d |
| /* handshake */ |
| #define USB_PID_ACK 0xd2 |
| #define USB_PID_NAK 0x5a |
| #define USB_PID_STALL 0x1e |
| #define USB_PID_NYET 0x96 |
| /* data */ |
| #define USB_PID_DATA0 0xc3 |
| #define USB_PID_DATA1 0x4b |
| #define USB_PID_DATA2 0x87 |
| #define USB_PID_MDATA 0x0f |
| /* Special */ |
| #define USB_PID_PREAMBLE 0x3c |
| #define USB_PID_ERR 0x3c |
| #define USB_PID_SPLIT 0x78 |
| #define USB_PID_PING 0xb4 |
| #define USB_PID_UNDEF_0 0xf0 |
| |
| #define USB_PID_DATA_TOGGLE 0x88 |
| #define DBGP_CLAIM (DBGP_OWNER | DBGP_ENABLED | DBGP_INUSE) |
| |
| #define PCI_CAP_ID_EHCI_DEBUG 0xa |
| |
| #define HUB_ROOT_RESET_TIME 50 /* times are in msec */ |
| #define HUB_SHORT_RESET_TIME 10 |
| #define HUB_LONG_RESET_TIME 200 |
| #define HUB_RESET_TIMEOUT 500 |
| |
| #define DBGP_MAX_PACKET 8 |
| #define DBGP_LOOPS 1000 |
| |
| static struct ehci_debug_info glob_dbg_info CAR_GLOBAL; |
| #if !defined(__PRE_RAM__) && !defined(__SMM__) |
| static struct device_operations *ehci_drv_ops; |
| static struct device_operations ehci_dbg_ops; |
| #endif |
| |
| static inline struct ehci_debug_info *dbgp_ehci_info(void) |
| { |
| return car_get_var_ptr(&glob_dbg_info); |
| } |
| |
| static int dbgp_wait_until_complete(struct ehci_dbg_port *ehci_debug) |
| { |
| u32 ctrl; |
| int loop = 0x100000; |
| |
| do { |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| /* Stop when the transaction is finished */ |
| if (ctrl & DBGP_DONE) |
| break; |
| } while (--loop > 0); |
| |
| if (!loop) |
| return -1; |
| |
| /* Now that we have observed the completed transaction, |
| * clear the done bit. |
| */ |
| write32((unsigned long)&ehci_debug->control, ctrl | DBGP_DONE); |
| return (ctrl & DBGP_ERROR) ? -DBGP_ERRCODE(ctrl) : DBGP_LEN(ctrl); |
| } |
| |
| static void dbgp_breath(void) |
| { |
| /* Sleep to give the debug port a chance to breathe */ |
| } |
| |
| static int dbgp_wait_until_done(struct ehci_dbg_port *ehci_debug, unsigned ctrl, int loop) |
| { |
| u32 pids, lpid; |
| int ret; |
| |
| retry: |
| write32((unsigned long)&ehci_debug->control, ctrl | DBGP_GO); |
| ret = dbgp_wait_until_complete(ehci_debug); |
| pids = read32((unsigned long)&ehci_debug->pids); |
| lpid = DBGP_PID_GET(pids); |
| |
| if (ret < 0) { |
| if (ret == -DBGP_ERR_BAD && --loop > 0) |
| goto retry; |
| return ret; |
| } |
| |
| /* If the port is getting full or it has dropped data |
| * start pacing ourselves, not necessary but it's friendly. |
| */ |
| if ((lpid == USB_PID_NAK) || (lpid == USB_PID_NYET)) |
| dbgp_breath(); |
| |
| /* If I get a NACK reissue the transmission */ |
| if (lpid == USB_PID_NAK) { |
| if (--loop > 0) |
| goto retry; |
| } |
| |
| return ret; |
| } |
| |
| static void dbgp_set_data(struct ehci_dbg_port *ehci_debug, const void *buf, int size) |
| { |
| const unsigned char *bytes = buf; |
| u32 lo, hi; |
| int i; |
| |
| lo = hi = 0; |
| for (i = 0; i < 4 && i < size; i++) |
| lo |= bytes[i] << (8*i); |
| for (; i < 8 && i < size; i++) |
| hi |= bytes[i] << (8*(i - 4)); |
| write32((unsigned long)&ehci_debug->data03, lo); |
| write32((unsigned long)&ehci_debug->data47, hi); |
| } |
| |
| static void dbgp_get_data(struct ehci_dbg_port *ehci_debug, void *buf, int size) |
| { |
| unsigned char *bytes = buf; |
| u32 lo, hi; |
| int i; |
| |
| lo = read32((unsigned long)&ehci_debug->data03); |
| hi = read32((unsigned long)&ehci_debug->data47); |
| for (i = 0; i < 4 && i < size; i++) |
| bytes[i] = (lo >> (8*i)) & 0xff; |
| for (; i < 8 && i < size; i++) |
| bytes[i] = (hi >> (8*(i - 4))) & 0xff; |
| } |
| |
| static int dbgp_bulk_write(struct ehci_dbg_port *ehci_debug, |
| unsigned devnum, unsigned endpoint, const char *bytes, int size) |
| { |
| u32 pids, addr, ctrl; |
| int ret; |
| |
| if (size > DBGP_MAX_PACKET) |
| return -1; |
| |
| addr = DBGP_EPADDR(devnum, endpoint); |
| |
| pids = read32((unsigned long)&ehci_debug->pids); |
| pids = DBGP_PID_UPDATE(pids, USB_PID_OUT); |
| |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, size); |
| ctrl |= DBGP_OUT; |
| ctrl |= DBGP_GO; |
| |
| dbgp_set_data(ehci_debug, bytes, size); |
| write32((unsigned long)&ehci_debug->address, addr); |
| write32((unsigned long)&ehci_debug->pids, pids); |
| |
| ret = dbgp_wait_until_done(ehci_debug, ctrl, DBGP_LOOPS); |
| |
| return ret; |
| } |
| |
| int dbgp_bulk_write_x(struct dbgp_pipe *pipe, const char *bytes, int size) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| return dbgp_bulk_write(dbg_info->ehci_debug, dbg_info->devnum, |
| pipe->endpoint, bytes, size); |
| } |
| |
| static int dbgp_bulk_read(struct ehci_dbg_port *ehci_debug, unsigned devnum, |
| unsigned endpoint, void *data, int size, int loops) |
| { |
| u32 pids, addr, ctrl; |
| int ret; |
| |
| if (size > DBGP_MAX_PACKET) |
| return -1; |
| |
| addr = DBGP_EPADDR(devnum, endpoint); |
| |
| pids = read32((unsigned long)&ehci_debug->pids); |
| pids = DBGP_PID_UPDATE(pids, USB_PID_IN); |
| |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, size); |
| ctrl &= ~DBGP_OUT; |
| ctrl |= DBGP_GO; |
| |
| write32((unsigned long)&ehci_debug->address, addr); |
| write32((unsigned long)&ehci_debug->pids, pids); |
| ret = dbgp_wait_until_done(ehci_debug, ctrl, loops); |
| if (ret < 0) |
| return ret; |
| |
| if (size > ret) |
| size = ret; |
| dbgp_get_data(ehci_debug, data, size); |
| return ret; |
| } |
| |
| int dbgp_bulk_read_x(struct dbgp_pipe *pipe, void *data, int size) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| return dbgp_bulk_read(dbg_info->ehci_debug, dbg_info->devnum, |
| pipe->endpoint, data, size, DBGP_LOOPS); |
| } |
| |
| static void dbgp_mdelay(int ms) |
| { |
| int i; |
| |
| while (ms--) { |
| for (i = 0; i < 1000; i++) |
| inb(0x80); |
| } |
| } |
| |
| static int dbgp_control_msg(struct ehci_dbg_port *ehci_debug, unsigned devnum, int requesttype, |
| int request, int value, int index, void *data, int size) |
| { |
| u32 pids, addr, ctrl; |
| struct usb_ctrlrequest req; |
| int read; |
| int ret; |
| |
| read = (requesttype & USB_DIR_IN) != 0; |
| if (size > (read ? DBGP_MAX_PACKET:0)) |
| return -1; |
| |
| /* Compute the control message */ |
| req.bRequestType = requesttype; |
| req.bRequest = request; |
| req.wValue = cpu_to_le16(value); |
| req.wIndex = cpu_to_le16(index); |
| req.wLength = cpu_to_le16(size); |
| |
| pids = DBGP_PID_SET(USB_PID_DATA0, USB_PID_SETUP); |
| addr = DBGP_EPADDR(devnum, 0); |
| |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, sizeof(req)); |
| ctrl |= DBGP_OUT; |
| ctrl |= DBGP_GO; |
| |
| /* Send the setup message */ |
| dbgp_set_data(ehci_debug, &req, sizeof(req)); |
| write32((unsigned long)&ehci_debug->address, addr); |
| write32((unsigned long)&ehci_debug->pids, pids); |
| ret = dbgp_wait_until_done(ehci_debug, ctrl, DBGP_LOOPS); |
| if (ret < 0) |
| return ret; |
| |
| |
| /* Read the result */ |
| ret = dbgp_bulk_read(ehci_debug, devnum, 0, data, size, DBGP_LOOPS); |
| return ret; |
| } |
| |
| static int ehci_reset_port(struct ehci_regs *ehci_regs, int port) |
| { |
| u32 portsc; |
| u32 delay_time, delay_ms; |
| int loop; |
| |
| /* Reset the usb debug port */ |
| portsc = read32((unsigned long)&ehci_regs->port_status[port - 1]); |
| portsc &= ~PORT_PE; |
| portsc |= PORT_RESET; |
| write32((unsigned long)&ehci_regs->port_status[port - 1], portsc); |
| |
| delay_ms = HUB_ROOT_RESET_TIME; |
| for (delay_time = 0; delay_time < HUB_RESET_TIMEOUT; |
| delay_time += delay_ms) { |
| dbgp_mdelay(delay_ms); |
| |
| portsc = read32((unsigned long)&ehci_regs->port_status[port - 1]); |
| if (portsc & PORT_RESET) { |
| /* force reset to complete */ |
| loop = 2; |
| write32((unsigned long)&ehci_regs->port_status[port - 1], |
| portsc & ~(PORT_RWC_BITS | PORT_RESET)); |
| do { |
| dbgp_mdelay(delay_ms); |
| portsc = read32((unsigned long)&ehci_regs->port_status[port - 1]); |
| delay_time += delay_ms; |
| } while ((portsc & PORT_RESET) && (--loop > 0)); |
| if (!loop) { |
| printk(BIOS_DEBUG, "ehci_reset_port forced done"); |
| } |
| } |
| |
| /* Device went away? */ |
| if (!(portsc & PORT_CONNECT)) |
| return -1; //-ENOTCONN; |
| |
| /* bomb out completely if something weird happened */ |
| if ((portsc & PORT_CSC)) |
| return -2; //-EINVAL; |
| |
| /* If we've finished resetting, then break out of the loop */ |
| if (!(portsc & PORT_RESET) && (portsc & PORT_PE)) |
| return 0; |
| } |
| return -3; //-EBUSY; |
| } |
| |
| static int ehci_wait_for_port(struct ehci_regs *ehci_regs, int port) |
| { |
| u32 status; |
| int ret, reps; |
| |
| for (reps = 0; reps < 3; reps++) { |
| dbgp_mdelay(100); |
| status = read32((unsigned long)&ehci_regs->status); |
| if (status & STS_PCD) { |
| ret = ehci_reset_port(ehci_regs, port); |
| if (ret == 0) |
| return 0; |
| } |
| } |
| return -1; //-ENOTCONN; |
| } |
| |
| static int usbdebug_init_(unsigned ehci_bar, unsigned offset, struct ehci_debug_info *info) |
| { |
| struct ehci_caps *ehci_caps; |
| struct ehci_regs *ehci_regs; |
| struct ehci_dbg_port *ehci_debug; |
| |
| struct usb_debug_descriptor dbgp_desc; |
| u32 cmd, ctrl, status, portsc, hcs_params; |
| u32 debug_port, new_debug_port = 0, n_ports; |
| u32 devnum; |
| int ret, i; |
| int loop; |
| int port_map_tried; |
| int playtimes = 3; |
| |
| ehci_caps = (struct ehci_caps *)ehci_bar; |
| ehci_regs = (struct ehci_regs *)(ehci_bar + |
| HC_LENGTH(read32((unsigned long)&ehci_caps->hc_capbase))); |
| ehci_debug = (struct ehci_dbg_port *)(ehci_bar + offset); |
| info->ehci_debug = (void *)0; |
| |
| memset(&info->ep_pipe, 0, sizeof (info->ep_pipe)); |
| try_next_time: |
| port_map_tried = 0; |
| |
| try_next_port: |
| hcs_params = read32((unsigned long)&ehci_caps->hcs_params); |
| debug_port = HCS_DEBUG_PORT(hcs_params); |
| n_ports = HCS_N_PORTS(hcs_params); |
| |
| dbgp_printk("ehci_bar: 0x%x\n", ehci_bar); |
| dbgp_printk("debug_port: %d\n", debug_port); |
| dbgp_printk("n_ports: %d\n", n_ports); |
| |
| for (i = 1; i <= n_ports; i++) { |
| portsc = read32((unsigned long)&ehci_regs->port_status[i-1]); |
| dbgp_printk("PORTSC #%d: %08x\n", i, portsc); |
| } |
| |
| if(port_map_tried && (new_debug_port != debug_port)) { |
| if(--playtimes) { |
| set_debug_port(debug_port); |
| goto try_next_time; |
| } |
| return -1; |
| } |
| |
| loop = 100; |
| /* Reset the EHCI controller */ |
| cmd = read32((unsigned long)&ehci_regs->command); |
| cmd |= CMD_RESET; |
| write32((unsigned long)&ehci_regs->command, cmd); |
| do { |
| dbgp_mdelay(10); |
| cmd = read32((unsigned long)&ehci_regs->command); |
| } while ((cmd & CMD_RESET) && (--loop > 0)); |
| |
| if(!loop) { |
| dbgp_printk("Could not reset EHCI controller.\n"); |
| // on some systems it works without succeeding here. |
| // return -2; |
| } else { |
| dbgp_printk("EHCI controller reset successfully.\n"); |
| } |
| |
| /* Claim ownership, but do not enable yet */ |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| ctrl |= DBGP_OWNER; |
| ctrl &= ~(DBGP_ENABLED | DBGP_INUSE); |
| write32((unsigned long)&ehci_debug->control, ctrl); |
| |
| /* Start EHCI controller */ |
| cmd = read32((unsigned long)&ehci_regs->command); |
| cmd &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE | CMD_ASE | CMD_RESET); |
| cmd |= CMD_RUN; |
| write32((unsigned long)&ehci_regs->command, cmd); |
| |
| /* Ensure everything is routed to the EHCI */ |
| write32((unsigned long)&ehci_regs->configured_flag, FLAG_CF); |
| |
| /* Wait until the controller is no longer halted */ |
| loop = 10; |
| do { |
| dbgp_mdelay(10); |
| status = read32((unsigned long)&ehci_regs->status); |
| } while ((status & STS_HALT) && (--loop > 0)); |
| |
| if(!loop) { |
| dbgp_printk("EHCI could not be started.\n"); |
| return -3; |
| } |
| dbgp_printk("EHCI started.\n"); |
| |
| /* Wait for a device to show up in the debug port */ |
| ret = ehci_wait_for_port(ehci_regs, debug_port); |
| if (ret < 0) { |
| dbgp_printk("No device found in debug port %d\n", debug_port); |
| goto next_debug_port; |
| } |
| dbgp_printk("EHCI done waiting for port.\n"); |
| |
| /* Enable the debug port */ |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| ctrl |= DBGP_CLAIM; |
| write32((unsigned long)&ehci_debug->control, ctrl); |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| if ((ctrl & DBGP_CLAIM) != DBGP_CLAIM) { |
| dbgp_printk("No device in EHCI debug port.\n"); |
| write32((unsigned long)&ehci_debug->control, ctrl & ~DBGP_CLAIM); |
| ret = -4; |
| goto err; |
| } |
| dbgp_printk("EHCI debug port enabled.\n"); |
| |
| /* Completely transfer the debug device to the debug controller */ |
| portsc = read32((unsigned long)&ehci_regs->port_status[debug_port - 1]); |
| portsc &= ~PORT_PE; |
| write32((unsigned long)&ehci_regs->port_status[debug_port - 1], portsc); |
| |
| dbgp_mdelay(100); |
| |
| /* Find the debug device and make it device number 127 */ |
| for (devnum = 0; devnum <= 127; devnum++) { |
| ret = dbgp_control_msg(ehci_debug, devnum, |
| USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE, |
| USB_REQ_GET_DESCRIPTOR, (USB_DT_DEBUG << 8), 0, |
| &dbgp_desc, sizeof(dbgp_desc)); |
| if (ret > 0) |
| break; |
| } |
| if (devnum > 127) { |
| dbgp_printk("Could not find attached debug device.\n"); |
| ret = -5; |
| goto err; |
| } |
| if (ret < 0) { |
| dbgp_printk("Attached device is not a debug device.\n"); |
| ret = -6; |
| goto err; |
| } |
| |
| /* Move the device to 127 if it isn't already there */ |
| if (devnum != USB_DEBUG_DEVNUM) { |
| ret = dbgp_control_msg(ehci_debug, devnum, |
| USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE, |
| USB_REQ_SET_ADDRESS, USB_DEBUG_DEVNUM, 0, NULL, 0); |
| if (ret < 0) { |
| dbgp_printk("Could not move attached device to %d.\n", |
| USB_DEBUG_DEVNUM); |
| ret = -7; |
| goto err; |
| } |
| devnum = USB_DEBUG_DEVNUM; |
| dbgp_printk("EHCI debug device renamed to 127.\n"); |
| } |
| |
| /* Enable the debug interface */ |
| ret = dbgp_control_msg(ehci_debug, USB_DEBUG_DEVNUM, |
| USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE, |
| USB_REQ_SET_FEATURE, USB_DEVICE_DEBUG_MODE, 0, NULL, 0); |
| if (ret < 0) { |
| dbgp_printk("Could not enable EHCI debug device.\n"); |
| ret = -8; |
| goto err; |
| } |
| dbgp_printk("EHCI debug interface enabled.\n"); |
| |
| /* Perform a small write to get the even/odd data state in sync */ |
| ret = dbgp_bulk_write(ehci_debug, USB_DEBUG_DEVNUM, dbgp_desc.bDebugOutEndpoint, "USB\r\n",5); |
| if (ret < 0) { |
| dbgp_printk("dbgp_bulk_write failed: %d\n", ret); |
| ret = -9; |
| goto err; |
| } |
| dbgp_printk("Test write done\n"); |
| |
| info->ehci_caps = ehci_caps; |
| info->ehci_regs = ehci_regs; |
| info->ehci_debug = ehci_debug; |
| info->devnum = devnum; |
| |
| info->ep_pipe[DBGP_CONSOLE_EPOUT].endpoint = dbgp_desc.bDebugOutEndpoint; |
| info->ep_pipe[DBGP_CONSOLE_EPIN].endpoint = dbgp_desc.bDebugInEndpoint; |
| info->ep_pipe[DBGP_CONSOLE_EPOUT].status |= DBGP_EP_ENABLED | DBGP_EP_VALID; |
| info->ep_pipe[DBGP_CONSOLE_EPIN].status |= DBGP_EP_ENABLED | DBGP_EP_VALID; |
| return 0; |
| err: |
| /* Things didn't work so remove my claim */ |
| ctrl = read32((unsigned long)&ehci_debug->control); |
| ctrl &= ~(DBGP_CLAIM | DBGP_OUT); |
| write32((unsigned long)(unsigned long)&ehci_debug->control, ctrl); |
| //return ret; |
| |
| next_debug_port: |
| port_map_tried |= (1 << (debug_port - 1)); |
| new_debug_port = ((debug_port-1 + 1) % n_ports) + 1; |
| if (port_map_tried != ((1 << n_ports) - 1)) { |
| set_debug_port(new_debug_port); |
| goto try_next_port; |
| } |
| if (--playtimes) { |
| //set_debug_port(new_debug_port); |
| set_debug_port(debug_port); |
| goto try_next_time; |
| } |
| |
| return -10; |
| } |
| |
| void usbdebug_tx_byte(struct dbgp_pipe *pipe, unsigned char data) |
| { |
| if (dbgp_ep_is_active(pipe)) { |
| pipe->buf[pipe->bufidx++] = data; |
| if (pipe->bufidx >= 8) { |
| dbgp_bulk_write_x(pipe, pipe->buf, pipe->bufidx); |
| pipe->bufidx = 0; |
| } |
| } |
| } |
| |
| void usbdebug_tx_flush(struct dbgp_pipe *pipe) |
| { |
| if (dbgp_ep_is_active(pipe) && pipe->bufidx > 0) { |
| dbgp_bulk_write_x(pipe, pipe->buf, pipe->bufidx); |
| pipe->bufidx = 0; |
| } |
| } |
| |
| #if !defined(__PRE_RAM__) && !defined(__SMM__) |
| static void usbdebug_re_enable(unsigned ehci_base) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| unsigned diff; |
| int i; |
| |
| if (!dbg_info->ehci_debug) |
| return; |
| |
| diff = (unsigned)dbg_info->ehci_caps - ehci_base; |
| dbg_info->ehci_regs -= diff; |
| dbg_info->ehci_debug -= diff; |
| dbg_info->ehci_caps = (void*)ehci_base; |
| |
| for (i=0; i<DBGP_MAX_ENDPOINTS; i++) |
| dbg_info->ep_pipe[i].status |= DBGP_EP_ENABLED; |
| } |
| |
| static void usbdebug_disable(void) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| int i; |
| for (i=0; i<DBGP_MAX_ENDPOINTS; i++) |
| dbg_info->ep_pipe[i].status &= ~DBGP_EP_ENABLED; |
| } |
| |
| static void pci_ehci_set_resources(struct device *dev) |
| { |
| struct resource *res; |
| |
| printk(BIOS_DEBUG, "%s EHCI Debug Port hook triggered\n", dev_path(dev)); |
| usbdebug_disable(); |
| |
| if (ehci_drv_ops->set_resources) |
| ehci_drv_ops->set_resources(dev); |
| res = find_resource(dev, EHCI_BAR_INDEX); |
| if (!res) |
| return; |
| |
| usbdebug_re_enable((u32)res->base); |
| report_resource_stored(dev, res, ""); |
| printk(BIOS_DEBUG, "%s EHCI Debug Port relocated\n", dev_path(dev)); |
| } |
| |
| void pci_ehci_read_resources(struct device *dev) |
| { |
| if (!ehci_drv_ops) { |
| memcpy(&ehci_dbg_ops, dev->ops, sizeof(ehci_dbg_ops)); |
| ehci_drv_ops = dev->ops; |
| ehci_dbg_ops.set_resources = pci_ehci_set_resources; |
| dev->ops = &ehci_dbg_ops; |
| printk(BIOS_DEBUG, "%s EHCI BAR hook registered\n", dev_path(dev)); |
| } else { |
| printk(BIOS_DEBUG, "More than one caller of %s from %s\n", __func__, dev_path(dev)); |
| } |
| |
| pci_dev_read_resources(dev); |
| } |
| #endif |
| |
| int dbgp_ep_is_active(struct dbgp_pipe *pipe) |
| { |
| return (pipe->status & DBGP_EP_STATMASK) == (DBGP_EP_VALID | DBGP_EP_ENABLED); |
| } |
| |
| struct dbgp_pipe *dbgp_console_output(void) |
| { |
| return &dbgp_ehci_info()->ep_pipe[DBGP_CONSOLE_EPOUT]; |
| } |
| |
| struct dbgp_pipe *dbgp_console_input(void) |
| { |
| return &dbgp_ehci_info()->ep_pipe[DBGP_CONSOLE_EPIN]; |
| } |
| |
| int usbdebug_init(void) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| |
| #if defined(__PRE_RAM__) || !CONFIG_EARLY_CONSOLE |
| enable_usbdebug(CONFIG_USBDEBUG_DEFAULT_PORT); |
| #endif |
| return usbdebug_init_(CONFIG_EHCI_BAR, CONFIG_EHCI_DEBUG_OFFSET, dbg_info); |
| } |