| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <stddef.h> |
| #include <console/console.h> |
| #include <console/usb.h> |
| #include <arch/io.h> |
| #include <device/mmio.h> |
| #include <arch/symbols.h> |
| #include <string.h> |
| #include <cbmem.h> |
| |
| #include "ehci_debug.h" |
| #include "usb_ch9.h" |
| #include "ehci.h" |
| |
| struct ehci_debug_info { |
| u64 ehci_base; |
| u64 ehci_debug; |
| |
| struct dbgp_pipe ep_pipe[DBGP_MAX_ENDPOINTS]; |
| } __packed; |
| |
| #if CONFIG(DEBUG_CONSOLE_INIT) |
| /* When selected, you can debug the connection of usbdebug dongle. |
| * EHCI port register bits and USB packets are dumped on console, |
| * assuming some other console already works. |
| */ |
| # define dprintk(LEVEL, args...) \ |
| do { if (!dbgp_enabled()) printk(LEVEL, ##args); } while (0) |
| #else |
| # define dprintk(LEVEL, args...) do {} while (0) |
| #endif |
| |
| #define DBGP_LEN_UPDATE(x, len) (((x) & ~0x0f) | ((len) & 0x0f)) |
| |
| #define DBGP_CLAIM (DBGP_OWNER | DBGP_ENABLED | DBGP_INUSE) |
| |
| #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_MICROFRAME_TIMEOUT_LOOPS 1000 |
| #define DBGP_MICROFRAME_RETRIES 10 |
| #define DBGP_MAX_PACKET 8 |
| |
| static int dbgp_enabled(void); |
| static void dbgp_print_data(struct ehci_dbg_port *ehci_debug); |
| |
| static struct ehci_debug_info glob_dbg_info; |
| static struct ehci_debug_info *glob_dbg_info_p; |
| |
| static inline struct ehci_debug_info *dbgp_ehci_info(void) |
| { |
| if (glob_dbg_info_p == NULL) { |
| struct ehci_debug_info *info; |
| if (ENV_BOOTBLOCK || ENV_SEPARATE_VERSTAGE || ENV_ROMSTAGE) { |
| /* The message likely does not show if we hit this. */ |
| if (sizeof(*info) > _car_ehci_dbg_info_size) |
| die("BUG: Increase ehci_dbg_info reserve in CAR"); |
| info = (void *)_car_ehci_dbg_info; |
| } else { |
| info = &glob_dbg_info; |
| } |
| glob_dbg_info_p = info; |
| } |
| return glob_dbg_info_p; |
| } |
| |
| static int dbgp_wait_until_complete(struct ehci_dbg_port *ehci_debug) |
| { |
| u32 ctrl; |
| int loop = 0; |
| |
| do { |
| ctrl = read32(&ehci_debug->control); |
| /* Stop when the transaction is finished */ |
| if (ctrl & DBGP_DONE) |
| break; |
| } while (++loop < DBGP_MICROFRAME_TIMEOUT_LOOPS); |
| |
| if (! (ctrl & DBGP_DONE)) { |
| dprintk(BIOS_ERR, "%s: retry timeout.\n", __func__); |
| return -DBGP_ERR_SIGNAL; |
| } |
| |
| /* Now that we have observed the completed transaction, |
| * clear the done bit. |
| */ |
| write32(&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, struct dbgp_pipe *pipe, |
| unsigned int ctrl, const int timeout) |
| { |
| u32 rd_ctrl, rd_pids; |
| u32 ctrl_prev = 0, pids_prev = 0; |
| u8 lpid; |
| int ret, host_retries; |
| int loop; |
| |
| loop = 0; |
| device_retry: |
| host_retries = 0; |
| if (loop++ >= timeout) |
| return -DBGP_ERR_BAD; |
| |
| host_retry: |
| if (host_retries++ >= DBGP_MICROFRAME_RETRIES) |
| return -DBGP_ERR_BAD; |
| if (loop == 1 || host_retries > 1) |
| dprintk(BIOS_SPEW, "dbgp: start (@ %3d,%d) ctrl=%08x\n", |
| loop, host_retries, ctrl | DBGP_GO); |
| write32(&ehci_debug->control, ctrl | DBGP_GO); |
| ret = dbgp_wait_until_complete(ehci_debug); |
| rd_ctrl = read32(&ehci_debug->control); |
| rd_pids = read32(&ehci_debug->pids); |
| |
| if (rd_ctrl != ctrl_prev || rd_pids != pids_prev || (ret<0)) { |
| ctrl_prev = rd_ctrl; |
| pids_prev = rd_pids; |
| dprintk(BIOS_SPEW, "dbgp: status (@ %3d,%d) ctrl=%08x pids=%08x ret=%d\n", |
| loop, host_retries, rd_ctrl, rd_pids, ret); |
| } |
| |
| /* Controller hardware failure. */ |
| if (ret == -DBGP_ERR_SIGNAL) { |
| return ret; |
| |
| /* Bus failure (corrupted microframe). */ |
| } else if (ret == -DBGP_ERR_BAD) { |
| goto host_retry; |
| } |
| |
| lpid = DBGP_PID_GET(rd_pids); |
| |
| /* If I get an ACK or in-sync DATA PID, we are done. */ |
| if ((lpid == USB_PID_ACK) || (lpid == pipe->pid)) { |
| pipe->pid ^= USB_PID_DATA_TOGGLE; |
| } |
| |
| /* If the port is getting full or it has dropped data |
| * start pacing ourselves, not necessary but it's friendly. |
| */ |
| else if (lpid == USB_PID_NYET) { |
| dbgp_breath(); |
| goto device_retry; |
| } |
| |
| /* If I get a NACK or out-of-sync DATA PID, reissue the transmission. */ |
| else if ((lpid == USB_PID_NAK) || (lpid == (pipe->pid ^ USB_PID_DATA_TOGGLE))) { |
| goto device_retry; |
| } |
| |
| /* Abort on STALL handshake for endpoint 0.*/ |
| else if ((lpid == USB_PID_STALL) && (pipe->endpoint == 0x0)) { |
| ret = -DBGP_ERR_BAD; |
| } |
| |
| dbgp_print_data(ehci_debug); |
| |
| 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(&ehci_debug->data03, lo); |
| write32(&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(&ehci_debug->data03); |
| hi = read32(&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 void dbgp_print_data(struct ehci_dbg_port *ehci_debug) |
| { |
| int len; |
| u32 ctrl, lo, hi; |
| |
| if (!CONFIG(DEBUG_CONSOLE_INIT) || dbgp_enabled()) |
| return; |
| |
| ctrl = read32(&ehci_debug->control); |
| lo = read32(&ehci_debug->data03); |
| hi = read32(&ehci_debug->data47); |
| |
| len = DBGP_LEN(ctrl); |
| if (len) { |
| int i; |
| dprintk(BIOS_SPEW, "dbgp: buf:"); |
| for (i = 0; i < 4 && i < len; i++) |
| dprintk(BIOS_SPEW, " %02x", (lo >> (8*i)) & 0xff); |
| for (; i < 8 && i < len; i++) |
| dprintk(BIOS_SPEW, " %02x", (hi >> (8*(i - 4))) & 0xff); |
| dprintk(BIOS_SPEW, "\n"); |
| } |
| } |
| |
| static int dbgp_bulk_write(struct ehci_dbg_port *ehci_debug, struct dbgp_pipe *pipe, |
| const char *bytes, int size) |
| { |
| u32 pids, addr, ctrl; |
| int ret; |
| |
| if (size > DBGP_MAX_PACKET) |
| return -1; |
| |
| addr = DBGP_EPADDR(pipe->devnum, pipe->endpoint); |
| pids = DBGP_PID_SET(pipe->pid, USB_PID_OUT); |
| |
| ctrl = read32(&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, size); |
| ctrl |= DBGP_OUT; |
| |
| dbgp_set_data(ehci_debug, bytes, size); |
| write32(&ehci_debug->address, addr); |
| write32(&ehci_debug->pids, pids); |
| |
| ret = dbgp_wait_until_done(ehci_debug, pipe, ctrl, pipe->timeout); |
| |
| 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(); |
| struct ehci_dbg_port *port; |
| port = (void *)(uintptr_t)dbg_info->ehci_debug; |
| return dbgp_bulk_write(port, pipe, bytes, size); |
| } |
| |
| static int dbgp_bulk_read(struct ehci_dbg_port *ehci_debug, struct dbgp_pipe *pipe, |
| void *data, int size) |
| { |
| u32 pids, addr, ctrl; |
| int ret; |
| |
| if (size > DBGP_MAX_PACKET) |
| return -1; |
| |
| addr = DBGP_EPADDR(pipe->devnum, pipe->endpoint); |
| pids = DBGP_PID_SET(pipe->pid, USB_PID_IN); |
| |
| ctrl = read32(&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, size); |
| ctrl &= ~DBGP_OUT; |
| |
| write32(&ehci_debug->address, addr); |
| write32(&ehci_debug->pids, pids); |
| ret = dbgp_wait_until_done(ehci_debug, pipe, ctrl, pipe->timeout); |
| 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(); |
| struct ehci_dbg_port *port; |
| port = (void *)(uintptr_t)dbg_info->ehci_debug; |
| return dbgp_bulk_read(port, pipe, data, size); |
| } |
| |
| void dbgp_mdelay(int ms) |
| { |
| int i; |
| |
| while (ms--) { |
| for (i = 0; i < 1000; i++) |
| inb(0x80); |
| } |
| } |
| |
| int dbgp_control_msg(struct ehci_dbg_port *ehci_debug, unsigned int devnum, int requesttype, |
| int request, int value, int index, void *data, int size) |
| { |
| struct ehci_debug_info *info = dbgp_ehci_info(); |
| struct dbgp_pipe *pipe = &info->ep_pipe[DBGP_SETUP_EP0]; |
| u32 pids, addr, ctrl; |
| struct usb_ctrlrequest req; |
| int read; |
| int ret, ret2; |
| |
| read = (requesttype & USB_DIR_IN) != 0; |
| if (size > DBGP_MAX_PACKET) |
| 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); |
| |
| pipe->devnum = devnum; |
| pipe->endpoint = 0; |
| pipe->pid = USB_PID_DATA0; |
| pipe->timeout = 1000; |
| addr = DBGP_EPADDR(pipe->devnum, pipe->endpoint); |
| pids = DBGP_PID_SET(pipe->pid, USB_PID_SETUP); |
| |
| ctrl = read32(&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, sizeof(req)); |
| ctrl |= DBGP_OUT; |
| |
| /* Setup stage */ |
| dbgp_set_data(ehci_debug, &req, sizeof(req)); |
| write32(&ehci_debug->address, addr); |
| write32(&ehci_debug->pids, pids); |
| ret = dbgp_wait_until_done(ehci_debug, pipe, ctrl, 1); |
| if (ret < 0) |
| return ret; |
| |
| /* Data stage (optional) */ |
| if (read && size) |
| ret = dbgp_bulk_read(ehci_debug, pipe, data, size); |
| else if (!read && size) |
| ret = dbgp_bulk_write(ehci_debug, pipe, data, size); |
| |
| /* Status stage in opposite direction */ |
| pipe->pid = USB_PID_DATA1; |
| ctrl = read32(&ehci_debug->control); |
| ctrl = DBGP_LEN_UPDATE(ctrl, 0); |
| if (read) { |
| pids = DBGP_PID_SET(pipe->pid, USB_PID_OUT); |
| ctrl |= DBGP_OUT; |
| } else { |
| pids = DBGP_PID_SET(pipe->pid, USB_PID_IN); |
| ctrl &= ~DBGP_OUT; |
| } |
| |
| write32(&ehci_debug->pids, pids); |
| ret2 = dbgp_wait_until_done(ehci_debug, pipe, ctrl, pipe->timeout); |
| if (ret2 < 0) |
| return ret2; |
| |
| return ret; |
| } |
| |
| static int ehci_reset_port(struct ehci_regs *ehci_regs, int port) |
| { |
| u32 portsc; |
| int loop; |
| |
| /* Reset the USB debug port */ |
| portsc = read32(&ehci_regs->port_status[port - 1]); |
| portsc &= ~PORT_PE; |
| portsc |= PORT_RESET; |
| write32(&ehci_regs->port_status[port - 1], portsc); |
| |
| dbgp_mdelay(HUB_ROOT_RESET_TIME); |
| |
| portsc = read32(&ehci_regs->port_status[port - 1]); |
| write32(&ehci_regs->port_status[port - 1], |
| portsc & ~(PORT_RWC_BITS | PORT_RESET)); |
| |
| loop = 100; |
| do { |
| dbgp_mdelay(1); |
| portsc = read32(&ehci_regs->port_status[port - 1]); |
| } while ((portsc & PORT_RESET) && (--loop > 0)); |
| |
| /* 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(&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_(uintptr_t ehci_bar, unsigned int offset, struct ehci_debug_info *info) |
| { |
| struct ehci_caps *ehci_caps; |
| struct ehci_regs *ehci_regs; |
| |
| u32 cmd, ctrl, status, portsc, hcs_params; |
| u32 debug_port, new_debug_port = 0, n_ports; |
| int ret, i; |
| int loop; |
| int port_map_tried; |
| int playtimes = 3; |
| |
| /* Keep all endpoints disabled before any printk() call. */ |
| memset(info, 0, sizeof (*info)); |
| info->ehci_base = ehci_bar; |
| info->ehci_debug = ehci_bar + offset; |
| info->ep_pipe[0].status |= DBGP_EP_NOT_PRESENT; |
| |
| dprintk(BIOS_INFO, "ehci_bar: 0x%lx debug_offset 0x%x\n", ehci_bar, offset); |
| |
| ehci_caps = (struct ehci_caps *)ehci_bar; |
| ehci_regs = (struct ehci_regs *)(ehci_bar + |
| HC_LENGTH(read32(&ehci_caps->hc_capbase))); |
| |
| struct ehci_dbg_port *ehci_debug = (void *)(uintptr_t)info->ehci_debug; |
| |
| if (CONFIG_USBDEBUG_DEFAULT_PORT > 0) |
| ehci_debug_select_port(CONFIG_USBDEBUG_DEFAULT_PORT); |
| else |
| ehci_debug_select_port(1); |
| |
| try_next_time: |
| port_map_tried = 0; |
| |
| try_next_port: |
| hcs_params = read32(&ehci_caps->hcs_params); |
| debug_port = HCS_DEBUG_PORT(hcs_params); |
| n_ports = HCS_N_PORTS(hcs_params); |
| |
| dprintk(BIOS_INFO, "debug_port: %d\n", debug_port); |
| dprintk(BIOS_INFO, "n_ports: %d\n", n_ports); |
| |
| for (i = 1; i <= n_ports; i++) { |
| portsc = read32(&ehci_regs->port_status[i-1]); |
| dprintk(BIOS_INFO, "PORTSC #%d: %08x\n", i, portsc); |
| } |
| |
| if (port_map_tried && (new_debug_port != debug_port)) { |
| if (--playtimes) { |
| ehci_debug_select_port(debug_port); |
| goto try_next_time; |
| } |
| return -1; |
| } |
| |
| /* Wait until the controller is halted */ |
| status = read32(&ehci_regs->status); |
| if (!(status & STS_HALT)) { |
| cmd = read32(&ehci_regs->command); |
| cmd &= ~CMD_RUN; |
| write32(&ehci_regs->command, cmd); |
| loop = 100; |
| do { |
| dbgp_mdelay(10); |
| status = read32(&ehci_regs->status); |
| } while (!(status & STS_HALT) && (--loop > 0)); |
| if (status & STS_HALT) |
| dprintk(BIOS_INFO, "EHCI controller halted successfully.\n"); |
| else |
| dprintk(BIOS_INFO, "EHCI controller is not halted. Reset may fail.\n"); |
| } |
| |
| loop = 100; |
| /* Reset the EHCI controller */ |
| cmd = read32(&ehci_regs->command); |
| cmd |= CMD_RESET; |
| write32(&ehci_regs->command, cmd); |
| do { |
| dbgp_mdelay(10); |
| cmd = read32(&ehci_regs->command); |
| } while ((cmd & CMD_RESET) && (--loop > 0)); |
| |
| if (!loop) { |
| dprintk(BIOS_INFO, "Could not reset EHCI controller.\n"); |
| // on some systems it works without succeeding here. |
| // return -2; |
| } else { |
| dprintk(BIOS_INFO, "EHCI controller reset successfully.\n"); |
| } |
| |
| /* Claim ownership, but do not enable yet */ |
| ctrl = read32(&ehci_debug->control); |
| ctrl |= DBGP_OWNER; |
| ctrl &= ~(DBGP_ENABLED | DBGP_INUSE); |
| write32(&ehci_debug->control, ctrl); |
| |
| /* Start EHCI controller */ |
| cmd = read32(&ehci_regs->command); |
| cmd &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE | CMD_ASE | CMD_RESET); |
| cmd |= CMD_RUN; |
| write32(&ehci_regs->command, cmd); |
| |
| /* Ensure everything is routed to the EHCI */ |
| write32(&ehci_regs->configured_flag, FLAG_CF); |
| |
| /* Wait until the controller is no longer halted */ |
| loop = 10; |
| do { |
| dbgp_mdelay(10); |
| status = read32(&ehci_regs->status); |
| } while ((status & STS_HALT) && (--loop > 0)); |
| |
| if (!loop) { |
| dprintk(BIOS_INFO, "EHCI could not be started.\n"); |
| return -3; |
| } |
| dprintk(BIOS_INFO, "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) { |
| dprintk(BIOS_INFO, "No device found in debug port %d\n", debug_port); |
| goto next_debug_port; |
| } |
| dprintk(BIOS_INFO, "EHCI done waiting for port.\n"); |
| |
| |
| /* Enable the debug port */ |
| ctrl = read32(&ehci_debug->control); |
| ctrl |= DBGP_CLAIM; |
| write32(&ehci_debug->control, ctrl); |
| ctrl = read32(&ehci_debug->control); |
| if ((ctrl & DBGP_CLAIM) != DBGP_CLAIM) { |
| dprintk(BIOS_INFO, "No device in EHCI debug port.\n"); |
| write32(&ehci_debug->control, ctrl & ~DBGP_CLAIM); |
| ret = -4; |
| goto err; |
| } |
| dprintk(BIOS_INFO, "EHCI debug port enabled.\n"); |
| |
| dbgp_mdelay(100); |
| |
| struct ehci_dbg_port *port = (void *)(uintptr_t)info->ehci_debug; |
| ret = dbgp_probe_gadget(port, &info->ep_pipe[0]); |
| if (ret < 0) { |
| dprintk(BIOS_INFO, "Could not probe gadget on debug port.\n"); |
| ret = -6; |
| goto err; |
| } |
| |
| info->ep_pipe[0].status &= ~DBGP_EP_NOT_PRESENT; |
| |
| return 0; |
| err: |
| /* Things didn't work so remove my claim */ |
| ctrl = read32(&ehci_debug->control); |
| ctrl &= ~(DBGP_CLAIM | DBGP_OUT); |
| write32(&ehci_debug->control, ctrl); |
| //return ret; |
| |
| next_debug_port: |
| if (CONFIG_USBDEBUG_DEFAULT_PORT == 0) { |
| 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)) { |
| ehci_debug_select_port(new_debug_port); |
| goto try_next_port; |
| } |
| if (--playtimes) { |
| ehci_debug_select_port(new_debug_port); |
| goto try_next_time; |
| } |
| } else { |
| if (--playtimes) |
| goto try_next_time; |
| } |
| |
| return -10; |
| } |
| |
| static int dbgp_enabled(void) |
| { |
| struct dbgp_pipe *globals = &dbgp_ehci_info()->ep_pipe[DBGP_SETUP_EP0]; |
| return (globals->status & DBGP_EP_ENABLED); |
| } |
| |
| static int dbgp_not_present(void) |
| { |
| struct dbgp_pipe *globals = &dbgp_ehci_info()->ep_pipe[DBGP_SETUP_EP0]; |
| return (globals->status & DBGP_EP_NOT_PRESENT); |
| } |
| |
| int dbgp_try_get(struct dbgp_pipe *pipe) |
| { |
| struct dbgp_pipe *globals = &dbgp_ehci_info()->ep_pipe[DBGP_SETUP_EP0]; |
| if (!dbgp_ep_is_active(pipe) || (globals->status & DBGP_EP_BUSY)) |
| return 0; |
| globals->status |= DBGP_EP_BUSY; |
| pipe->status |= DBGP_EP_BUSY; |
| return 1; |
| } |
| |
| void dbgp_put(struct dbgp_pipe *pipe) |
| { |
| struct dbgp_pipe *globals = &dbgp_ehci_info()->ep_pipe[DBGP_SETUP_EP0]; |
| globals->status &= ~DBGP_EP_BUSY; |
| pipe->status &= ~DBGP_EP_BUSY; |
| } |
| |
| #if ENV_RAMSTAGE |
| void usbdebug_re_enable(uintptr_t ehci_base) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| u64 diff; |
| int i; |
| |
| diff = dbg_info->ehci_base - ehci_base; |
| dbg_info->ehci_debug -= diff; |
| dbg_info->ehci_base = ehci_base; |
| |
| for (i=0; i<DBGP_MAX_ENDPOINTS; i++) |
| if (dbg_info->ep_pipe[i].status & DBGP_EP_VALID) |
| dbg_info->ep_pipe[i].status |= DBGP_EP_ENABLED; |
| } |
| |
| 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; |
| } |
| |
| #endif |
| |
| int usbdebug_hw_init(bool force) |
| { |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| u32 ehci_base, dbg_offset; |
| |
| if (dbgp_enabled() && !force) |
| return 0; |
| |
| if (dbgp_not_present() && !force) |
| return -1; |
| |
| /* Do not attempt slow gadget init in postcar. */ |
| if (ENV_POSTCAR) |
| return -1; |
| |
| /* Do full init if state claims we are still not enabled. */ |
| if (ehci_debug_hw_enable(&ehci_base, &dbg_offset)) |
| return -1; |
| return usbdebug_init_(ehci_base, dbg_offset, dbg_info); |
| } |
| |
| static void migrate_ehci_debug(int is_recovery) |
| { |
| struct ehci_debug_info *dbg_info_cbmem; |
| int rv; |
| |
| if (ENV_ROMSTAGE) { |
| /* Move state from CAR to CBMEM. */ |
| struct ehci_debug_info *dbg_info = dbgp_ehci_info(); |
| dbg_info_cbmem = cbmem_add(CBMEM_ID_EHCI_DEBUG, |
| sizeof(*dbg_info)); |
| if (dbg_info_cbmem == NULL) |
| return; |
| memcpy(dbg_info_cbmem, dbg_info, sizeof(*dbg_info)); |
| glob_dbg_info_p = dbg_info_cbmem; |
| return; |
| } |
| |
| if (CONFIG(USBDEBUG_IN_PRE_RAM)) { |
| /* Use state in CBMEM. */ |
| dbg_info_cbmem = cbmem_find(CBMEM_ID_EHCI_DEBUG); |
| if (dbg_info_cbmem) |
| glob_dbg_info_p = dbg_info_cbmem; |
| } |
| |
| rv = usbdebug_hw_init(false); |
| if (rv < 0) |
| printk(BIOS_DEBUG, "usbdebug: Failed hardware init\n"); |
| else |
| printk(BIOS_DEBUG, "usbdebug: " ENV_STRING " starting...\n"); |
| } |
| |
| ROMSTAGE_CBMEM_INIT_HOOK(migrate_ehci_debug); |
| POSTCAR_CBMEM_INIT_HOOK(migrate_ehci_debug); |
| RAMSTAGE_CBMEM_INIT_HOOK(migrate_ehci_debug); |
| |
| 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]; |
| } |
| |
| void usbdebug_init(void) |
| { |
| /* USB console init is done early in romstage, yet delayed to |
| * CBMEM_INIT_HOOKs for postcar and ramstage as we recover state |
| * from CBMEM. |
| */ |
| if (CONFIG(USBDEBUG_IN_PRE_RAM) |
| && (ENV_ROMSTAGE || ENV_BOOTBLOCK)) |
| usbdebug_hw_init(false); |
| |
| /* USB console init is done early in ramstage if it was |
| * not done in romstage, this does not require CBMEM. |
| */ |
| if (!CONFIG(USBDEBUG_IN_PRE_RAM) && ENV_RAMSTAGE) |
| usbdebug_hw_init(false); |
| } |