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-rw-r--r--src/lib/usbdebug_direct.c539
1 files changed, 539 insertions, 0 deletions
diff --git a/src/lib/usbdebug_direct.c b/src/lib/usbdebug_direct.c
new file mode 100644
index 0000000000..4b9affea93
--- /dev/null
+++ b/src/lib/usbdebug_direct.c
@@ -0,0 +1,539 @@
+/*
+ * Copyright (C) 2006 Eric Biederman (ebiederm@xmission.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * 2006.12.10 yhlu moved it to LinuxBIOS and use struct instead
+ */
+#ifndef __ROMCC__
+#include <console/console.h>
+#else
+#if CONFIG_USE_PRINTK_IN_CAR==0
+#define printk_debug(fmt, arg...) do {} while(0)
+#endif
+#endif
+
+
+#include <arch/io.h>
+
+#include <usb_ch9.h>
+#include <ehci.h>
+#include <usbdebug_direct.h>
+
+#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
+
+static int dbgp_wait_until_complete(struct ehci_dbg_port *ehci_debug)
+{
+ unsigned ctrl;
+ int loop = 0x100000;
+ do {
+ ctrl = readl(&ehci_debug->control);
+ /* Stop when the transaction is finished */
+ if (ctrl & DBGP_DONE)
+ break;
+ } while(--loop>0);
+
+ if (!loop) return -1000;
+
+ /* Now that we have observed the completed transaction,
+ * clear the done bit.
+ */
+ writel(ctrl | DBGP_DONE, &ehci_debug->control);
+ return (ctrl & DBGP_ERROR) ? -DBGP_ERRCODE(ctrl) : DBGP_LEN(ctrl);
+}
+
+static void dbgp_mdelay(int ms)
+{
+ int i;
+ while (ms--) {
+ for (i = 0; i < 1000; i++)
+ outb(0x1, 0x80);
+ }
+}
+
+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)
+{
+ unsigned pids, lpid;
+ int ret;
+
+ int loop = 3;
+retry:
+ writel(ctrl | DBGP_GO, &ehci_debug->control);
+ ret = dbgp_wait_until_complete(ehci_debug);
+ pids = readl(&ehci_debug->pids);
+ lpid = DBGP_PID_GET(pids);
+
+ if (ret < 0)
+ 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;
+ unsigned 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));
+ writel(lo, &ehci_debug->data03);
+ writel(hi, &ehci_debug->data47);
+}
+
+static void dbgp_get_data(struct ehci_dbg_port *ehci_debug, void *buf, int size)
+{
+ unsigned char *bytes = buf;
+ unsigned lo, hi;
+ int i;
+ lo = readl(&ehci_debug->data03);
+ hi = readl(&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)
+{
+ unsigned pids, addr, ctrl;
+ int ret;
+ if (size > DBGP_MAX_PACKET)
+ return -1;
+
+ addr = DBGP_EPADDR(devnum, endpoint);
+
+ pids = readl(&ehci_debug->pids);
+ pids = DBGP_PID_UPDATE(pids, USB_PID_OUT);
+
+ ctrl = readl(&ehci_debug->control);
+ ctrl = DBGP_LEN_UPDATE(ctrl, size);
+ ctrl |= DBGP_OUT;
+ ctrl |= DBGP_GO;
+
+ dbgp_set_data(ehci_debug, bytes, size);
+ writel(addr, &ehci_debug->address);
+ writel(pids, &ehci_debug->pids);
+
+ ret = dbgp_wait_until_done(ehci_debug, ctrl);
+ if (ret < 0) {
+ return ret;
+ }
+ return ret;
+}
+
+int dbgp_bulk_write_x(struct ehci_debug_info *dbg_info, const char *bytes, int size)
+{
+ return dbgp_bulk_write(dbg_info->ehci_debug, dbg_info->devnum, dbg_info->endpoint_out, bytes, size);
+}
+
+static int dbgp_bulk_read(struct ehci_dbg_port *ehci_debug, unsigned devnum, unsigned endpoint, void *data, int size)
+{
+ unsigned pids, addr, ctrl;
+ int ret;
+
+ if (size > DBGP_MAX_PACKET)
+ return -1;
+
+ addr = DBGP_EPADDR(devnum, endpoint);
+
+ pids = readl(&ehci_debug->pids);
+ pids = DBGP_PID_UPDATE(pids, USB_PID_IN);
+
+ ctrl = readl(&ehci_debug->control);
+ ctrl = DBGP_LEN_UPDATE(ctrl, size);
+ ctrl &= ~DBGP_OUT;
+ ctrl |= DBGP_GO;
+
+ writel(addr, &ehci_debug->address);
+ writel(pids, &ehci_debug->pids);
+ ret = dbgp_wait_until_done(ehci_debug, ctrl);
+ 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 ehci_debug_info *dbg_info, void *data, int size)
+{
+ return dbgp_bulk_read(dbg_info->ehci_debug, dbg_info->devnum, dbg_info->endpoint_in, data, size);
+}
+
+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)
+{
+ unsigned 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 = value;
+ req.wIndex = index;
+ req.wLength = size;
+
+ pids = DBGP_PID_SET(USB_PID_DATA0, USB_PID_SETUP);
+ addr = DBGP_EPADDR(devnum, 0);
+
+ ctrl = readl(&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));
+ writel(addr, &ehci_debug->address);
+ writel(pids, &ehci_debug->pids);
+ ret = dbgp_wait_until_done(ehci_debug, ctrl);
+ if (ret < 0)
+ return ret;
+
+
+ /* Read the result */
+ ret = dbgp_bulk_read(ehci_debug, devnum, 0, data, size);
+ return ret;
+}
+
+static int ehci_reset_port(struct ehci_regs *ehci_regs, int port)
+{
+ unsigned portsc;
+ unsigned delay_time, delay;
+ int loop;
+
+ /* Reset the usb debug port */
+ portsc = readl(&ehci_regs->port_status[port - 1]);
+ portsc &= ~PORT_PE;
+ portsc |= PORT_RESET;
+ writel(portsc, &ehci_regs->port_status[port - 1]);
+
+ delay = HUB_ROOT_RESET_TIME;
+ for (delay_time = 0; delay_time < HUB_RESET_TIMEOUT;
+ delay_time += delay) {
+ dbgp_mdelay(delay);
+
+ portsc = readl(&ehci_regs->port_status[port - 1]);
+ if (portsc & PORT_RESET) {
+ /* force reset to complete */
+ loop = 2;
+ writel(portsc & ~(PORT_RWC_BITS | PORT_RESET),
+ &ehci_regs->port_status[port - 1]);
+ do {
+ dbgp_mdelay(delay);
+ portsc = readl(&ehci_regs->port_status[port - 1]);
+ delay_time += delay;
+ } while ((portsc & PORT_RESET) && (--loop > 0));
+ if (!loop) {
+ printk_debug("ehci_reset_port forced done");
+ }
+ }
+
+ /* Device went away? */
+ if (!(portsc & PORT_CONNECT))
+ return -107;//-ENOTCONN;
+
+ /* bomb out completely if something weird happend */
+ if ((portsc & PORT_CSC))
+ return -22;//-EINVAL;
+
+ /* If we've finished resetting, then break out of the loop */
+ if (!(portsc & PORT_RESET) && (portsc & PORT_PE))
+ return 0;
+ }
+ return -16;//-EBUSY;
+}
+
+static int ehci_wait_for_port(struct ehci_regs *ehci_regs, int port)
+{
+ unsigned status;
+ int ret, reps;
+ for (reps = 0; reps < 3; reps++) {
+ dbgp_mdelay(100);
+ status = readl(&ehci_regs->status);
+ if (status & STS_PCD) {
+ ret = ehci_reset_port(ehci_regs, port);
+ if (ret == 0)
+ return 0;
+ }
+ }
+ return -107; //-ENOTCONN;
+}
+
+
+#define DBGP_DEBUG 1
+#if DBGP_DEBUG
+# define dbgp_printk printk_debug
+#else
+#define dbgp_printk(fmt, arg...) do {} while(0)
+#endif
+static void usbdebug_direct_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;
+ unsigned dbgp_endpoint_out;
+ unsigned dbgp_endpoint_in;
+ struct usb_debug_descriptor dbgp_desc;
+ unsigned ctrl, devnum;
+ int ret;
+ unsigned delay_time, delay;
+ int loop;
+
+ unsigned cmd, status, portsc, hcs_params, debug_port, n_ports, new_debug_port;
+ int i;
+ unsigned port_map_tried;
+
+ unsigned playtimes = 3;
+
+ ehci_caps = (struct ehci_caps *)ehci_bar;
+ ehci_regs = (struct ehci_regs *)(ehci_bar + HC_LENGTH(readl(&ehci_caps->hc_capbase)));
+ ehci_debug = (struct ehci_dbg_port *)(ehci_bar + offset);
+
+ info->ehci_debug = (void *)0;
+
+try_next_time:
+ port_map_tried = 0;
+
+try_next_port:
+ hcs_params = readl(&ehci_caps->hcs_params);
+ debug_port = HCS_DEBUG_PORT(hcs_params);
+ n_ports = HCS_N_PORTS(hcs_params);
+
+ dbgp_printk("debug_port: %d\n", debug_port);
+ dbgp_printk("n_ports: %d\n", n_ports);
+
+#if 0
+ for (i = 1; i <= n_ports; i++) {
+ portsc = readl(&ehci_regs->port_status[i-1]);
+ dbgp_printk("portstatus%d: %08x\n", i, portsc);
+ }
+#endif
+
+ if(port_map_tried && (new_debug_port!=debug_port)) {
+ if(--playtimes) {
+ set_debug_port(debug_port);
+ goto try_next_time;
+ }
+ return;
+ }
+
+ /* Reset the EHCI controller */
+ loop = 10;
+ cmd = readl(&ehci_regs->command);
+ cmd |= CMD_RESET;
+ writel(cmd, &ehci_regs->command);
+ do {
+ cmd = readl(&ehci_regs->command);
+ } while ((cmd & CMD_RESET) && (--loop > 0));
+
+ if(!loop) {
+ dbgp_printk("can not reset ehci\n");
+ return;
+ }
+ dbgp_printk("ehci reset done\n");
+
+ /* Claim ownership, but do not enable yet */
+ ctrl = readl(&ehci_debug->control);
+ ctrl |= DBGP_OWNER;
+ ctrl &= ~(DBGP_ENABLED | DBGP_INUSE);
+ writel(ctrl, &ehci_debug->control);
+
+ /* Start the ehci running */
+ cmd = readl(&ehci_regs->command);
+ cmd &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE | CMD_ASE | CMD_RESET);
+ cmd |= CMD_RUN;
+ writel(cmd, &ehci_regs->command);
+
+ /* Ensure everything is routed to the EHCI */
+ writel(FLAG_CF, &ehci_regs->configured_flag);
+
+ /* Wait until the controller is no longer halted */
+ loop = 10;
+ do {
+ status = readl(&ehci_regs->status);
+ } while ((status & STS_HALT) && (--loop>0));
+
+ if(!loop) {
+ dbgp_printk("ehci can be started\n");
+ return;
+ }
+ 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 wait for port done\n");
+
+ /* Enable the debug port */
+ ctrl = readl(&ehci_debug->control);
+ ctrl |= DBGP_CLAIM;
+ writel(ctrl, &ehci_debug->control);
+ ctrl = readl(&ehci_debug->control);
+ if ((ctrl & DBGP_CLAIM) != DBGP_CLAIM) {
+ dbgp_printk("No device in debug port\n");
+ writel(ctrl & ~DBGP_CLAIM, &ehci_debug->control);
+ goto err;
+ }
+ dbgp_printk("debug ported enabled\n");
+
+ /* Completely transfer the debug device to the debug controller */
+ portsc = readl(&ehci_regs->port_status[debug_port - 1]);
+ portsc &= ~PORT_PE;
+ writel(portsc, &ehci_regs->port_status[debug_port - 1]);
+
+ 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");
+ goto err;
+ }
+ if (ret < 0) {
+ dbgp_printk("Attached device is not a debug device\n");
+ goto err;
+ }
+ dbgp_endpoint_out = dbgp_desc.bDebugOutEndpoint;
+ dbgp_endpoint_in = dbgp_desc.bDebugInEndpoint;
+
+ /* 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, (void *)0, 0);
+ if (ret < 0) {
+ dbgp_printk("Could not move attached device to %d\n",
+ USB_DEBUG_DEVNUM);
+ goto err;
+ }
+ devnum = USB_DEBUG_DEVNUM;
+ dbgp_printk("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, (void *)0, 0);
+ if (ret < 0) {
+ dbgp_printk(" Could not enable the debug device\n");
+ goto err;
+ }
+ dbgp_printk("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_endpoint_out, " ",1);
+ if (ret < 0) {
+ dbgp_printk("dbgp_bulk_write failed: %d\n", ret);
+ goto err;
+ }
+ dbgp_printk("small write doned\n");
+
+ info->ehci_caps = ehci_caps;
+ info->ehci_regs = ehci_regs;
+ info->ehci_debug = ehci_debug;
+ info->devnum = devnum;
+ info->endpoint_out = dbgp_endpoint_out;
+ info->endpoint_in = dbgp_endpoint_in;
+
+ return;
+err:
+ /* Things didn't work so remove my claim */
+ ctrl = readl(&ehci_debug->control);
+ ctrl &= ~(DBGP_CLAIM | DBGP_OUT);
+ writel(ctrl, &ehci_debug->control);
+
+next_debug_port:
+ port_map_tried |= (1<<(debug_port-1));
+ if(port_map_tried != ((1<<n_ports) -1)) {
+ new_debug_port = ((debug_port-1+1)%n_ports) + 1;
+ set_debug_port(new_debug_port);
+ goto try_next_port;
+ }
+ if(--playtimes) {
+ set_debug_port(debug_port);
+ goto try_next_time;
+ }
+
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 03:59:59 +0000