This patch gets usbdebug console working in romstage.

- actually hook up usbdebug in printk/print_ for romstage
- make usbdebug.c more similar to the Linux kernel version it was
  originally derived from.
- increase retries and timing for usbdebug init (at least one chipset
  seems to need this)
- src/pc80/usbdebug_serial.c is not needed
- some small console cleanups

Signed-off-by: Stefan Reinauer <reinauer@google.com>
Acked-by: Patrick Georgi <patrick.georgi@secunet.com>




git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6315 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 129 insertions, 90 deletions

diff --git a/src/lib/usbdebug.c b/src/lib/usbdebug.c
index c108fa3d3f..d022d2f345 100644
--- a/src/lib/usbdebug.c
+++ b/src/lib/usbdebug.c
@@ -2,6 +2,7 @@
  * 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
@@ -17,20 +18,24 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
  */
 
-#if !defined(__ROMCC__)
+#include <stddef.h>
 #include <console/console.h>
-#else
-#if CONFIG_CACHE_AS_RAM==0
-#define printk(BIOS_DEBUG, fmt, arg...)   do {} while(0)
-#endif
-#endif
-
 #include <arch/io.h>
+#include <arch/byteorder.h>
 
 #include <usb_ch9.h>
 #include <ehci.h>
 #include <usbdebug.h>
 
+// Does not work if we want early printk to do usb debug, too..
+#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
@@ -78,16 +83,18 @@
 
 static int dbgp_wait_until_complete(struct ehci_dbg_port *ehci_debug)
 {
-	unsigned ctrl;
+	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);
+	} while (--loop > 0);
 
-	if (!loop) return -1000;
+	if (!loop)
+		return -1;
 
 	/* Now that we have observed the completed transaction,
 	 * clear the done bit.
@@ -96,15 +103,6 @@ static int dbgp_wait_until_complete(struct ehci_dbg_port *ehci_debug)
 	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++)
-			inb(0x80);
-	}
-}
-
 static void dbgp_breath(void)
 {
 	/* Sleep to give the debug port a chance to breathe */
@@ -112,10 +110,10 @@ static void dbgp_breath(void)
 
 static int dbgp_wait_until_done(struct ehci_dbg_port *ehci_debug, unsigned ctrl)
 {
-	unsigned pids, lpid;
+	u32 pids, lpid;
 	int ret;
-
 	int loop = 3;
+
 retry:
 	write32((unsigned long)&ehci_debug->control, ctrl | DBGP_GO);
 	ret = dbgp_wait_until_complete(ehci_debug);
@@ -133,7 +131,8 @@ retry:
 
 	/* If I get a NACK reissue the transmission */
 	if (lpid == USB_PID_NAK) {
-		if (--loop > 0) goto retry;
+		if (--loop > 0)
+			goto retry;
 	}
 
 	return ret;
@@ -142,8 +141,9 @@ retry:
 static void dbgp_set_data(struct ehci_dbg_port *ehci_debug, const void *buf, int size)
 {
 	const unsigned char *bytes = buf;
-	unsigned lo, hi;
+	u32 lo, hi;
 	int i;
+
 	lo = hi = 0;
 	for (i = 0; i < 4 && i < size; i++)
 		lo |= bytes[i] << (8*i);
@@ -156,8 +156,9 @@ static void dbgp_set_data(struct ehci_dbg_port *ehci_debug, const void *buf, int
 static void dbgp_get_data(struct ehci_dbg_port *ehci_debug, void *buf, int size)
 {
 	unsigned char *bytes = buf;
-	unsigned lo, hi;
+	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++)
@@ -166,10 +167,12 @@ static void dbgp_get_data(struct ehci_dbg_port *ehci_debug, void *buf, int size)
 		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)
+static int dbgp_bulk_write(struct ehci_dbg_port *ehci_debug, 
+		unsigned devnum, unsigned endpoint, const char *bytes, int size)
 {
-	unsigned pids, addr, ctrl;
+	u32 pids, addr, ctrl;
 	int ret;
+
 	if (size > DBGP_MAX_PACKET)
 		return -1;
 
@@ -188,20 +191,20 @@ static int dbgp_bulk_write(struct ehci_dbg_port *ehci_debug, unsigned devnum, un
 	write32((unsigned long)&ehci_debug->pids, 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);
+	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)
+static int dbgp_bulk_read(struct ehci_dbg_port *ehci_debug, unsigned devnum,
+		unsigned endpoint, void *data, int size)
 {
-	unsigned pids, addr, ctrl;
+	u32 pids, addr, ctrl;
 	int ret;
 
 	if (size > DBGP_MAX_PACKET)
@@ -222,34 +225,48 @@ static int dbgp_bulk_read(struct ehci_dbg_port *ehci_debug, unsigned devnum, uns
 	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);
+	return dbgp_bulk_read(dbg_info->ehci_debug, dbg_info->devnum, 
+			dbg_info->endpoint_in, data, size);
+}
+
+#ifdef __PRE_RAM__
+static 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 devnum, int requesttype, int request,
-	int value, int index, void *data, int 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;
+	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))
+	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;
+	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);
@@ -275,8 +292,8 @@ int dbgp_control_msg(struct ehci_dbg_port *ehci_debug, unsigned devnum, int requ
 
 static int ehci_reset_port(struct ehci_regs *ehci_regs, int port)
 {
-	unsigned portsc;
-	unsigned delay_time, delay_ms;
+	u32 portsc;
+	u32 delay_time, delay_ms;
 	int loop;
 
 	/* Reset the usb debug port */
@@ -308,23 +325,24 @@ static int ehci_reset_port(struct ehci_regs *ehci_regs, int port)
 
 		/* Device went away? */
 		if (!(portsc & PORT_CONNECT))
-			return -107;//-ENOTCONN;
+			return -1; //-ENOTCONN;
 
 		/* bomb out completely if something weird happend */
 		if ((portsc & PORT_CSC))
-			return -22;//-EINVAL;
+			return -2; //-EINVAL;
 
 		/* If we've finished resetting, then break out of the loop */
 		if (!(portsc & PORT_RESET) && (portsc & PORT_PE))
 			return 0;
 	}
-	return -16;//-EBUSY;
+	return -3; //-EBUSY;
 }
 
-int ehci_wait_for_port(struct ehci_regs *ehci_regs, int port)
+static int ehci_wait_for_port(struct ehci_regs *ehci_regs, int port)
 {
-	unsigned status;
+	u32 status;
 	int ret, reps;
+
 	for (reps = 0; reps < 3; reps++) {
 		dbgp_mdelay(100);
 		status = read32((unsigned long)&ehci_regs->status);
@@ -334,44 +352,33 @@ int ehci_wait_for_port(struct ehci_regs *ehci_regs, int port)
 				return 0;
 		}
 	}
-	return -107; //-ENOTCONN;
+	return -1; //-ENOTCONN;
 }
 
 
-#define DBGP_DEBUG 1
-#if DBGP_DEBUG
-# define dbgp_printk(fmt_arg...) printk(BIOS_DEBUG, fmt_arg)
-#else
-#define dbgp_printk(fmt_arg...)   do {} while(0)
-#endif
-
-#ifdef __PRE_RAM__
-static void usbdebug_init(unsigned ehci_bar, unsigned offset, struct ehci_debug_info *info)
+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;
 	unsigned dbgp_endpoint_out;
 	unsigned dbgp_endpoint_in;
+
 	struct usb_debug_descriptor dbgp_desc;
-	unsigned ctrl, devnum;
-	int ret;
+	u32 cmd, ctrl, status, portsc, hcs_params;
+	u32 debug_port, new_debug_port = 0, n_ports;
+	u32 devnum;
+	int ret, i;
 	int loop;
-
-	unsigned cmd,  status, portsc, hcs_params, debug_port, n_ports, new_debug_port;
-	int i;
-	unsigned port_map_tried;
-
-	unsigned playtimes = 3;
+	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_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;
 
-	new_debug_port = 0;
-
 try_next_time:
 	port_map_tried = 0;
 
@@ -384,34 +391,36 @@ try_next_port:
 	dbgp_printk("debug_port: %d\n", debug_port);
 	dbgp_printk("n_ports:    %d\n", n_ports);
 
-#if 1
         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);
         }
-#endif
 
-	if(port_map_tried && (new_debug_port!=debug_port)) {
+	if(port_map_tried && (new_debug_port != debug_port)) {
 		if(--playtimes) {
 			set_debug_port(debug_port);
 			goto try_next_time;
 		}
-		return;
+		return -1;
 	}
 
+	loop = 100;
 	/* Reset the EHCI controller */
-	loop = 10;
 	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)
+	if(!loop) {
 		dbgp_printk("Could not reset EHCI controller.\n");
-	else
+		// 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);
@@ -419,7 +428,7 @@ try_next_port:
 	ctrl &= ~(DBGP_ENABLED | DBGP_INUSE);
 	write32((unsigned long)&ehci_debug->control, ctrl);
 
-	/* Start the ehci running */
+	/* Start EHCI controller */
 	cmd = read32((unsigned long)&ehci_regs->command);
 	cmd &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE | CMD_ASE | CMD_RESET);
 	cmd |= CMD_RUN;
@@ -431,12 +440,13 @@ try_next_port:
 	/* 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));
+	} while ((status & STS_HALT) && (--loop > 0));
 
 	if(!loop) {
 		dbgp_printk("EHCI could not be started.\n");
-		return;
+		return -3;
 	}
 	dbgp_printk("EHCI started.\n");
 
@@ -456,6 +466,7 @@ try_next_port:
 	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");
@@ -478,10 +489,12 @@ try_next_port:
 	}
 	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;
 	}
 	dbgp_endpoint_out = dbgp_desc.bDebugOutEndpoint;
@@ -491,10 +504,11 @@ try_next_port:
 	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);
+			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;
@@ -504,18 +518,19 @@ try_next_port:
 	/* 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);
+		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_endpoint_out, " ",1);
+	/* 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, "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");
@@ -527,26 +542,50 @@ try_next_port:
 	info->endpoint_out = dbgp_endpoint_out;
 	info->endpoint_in = dbgp_endpoint_in;
 
-	return;
+	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));
-	if(port_map_tried != ((1<<n_ports) -1)) {
-		new_debug_port = ((debug_port-1+1)%n_ports) + 1;
+	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) {
+	if (--playtimes) {
+		//set_debug_port(new_debug_port);
 		set_debug_port(debug_port);
 		goto try_next_time;
 	}
 
+	return -10;
 }
-#endif
 
+// **** This part is probably x86 specific and used by romstage.c **** //
 
+int early_usbdebug_init(void)
+{
+	struct ehci_debug_info *dbg_info = (struct ehci_debug_info *)
+	    (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE - sizeof(struct ehci_debug_info));
+
+	return usbdebug_init(CONFIG_EHCI_BAR, CONFIG_EHCI_DEBUG_OFFSET, dbg_info);
+}
+
+void usbdebug_tx_byte(unsigned char data)
+{
+	struct ehci_debug_info *dbg_info;
+
+	/* "Find" dbg_info structure in Cache */
+	dbg_info = (struct ehci_debug_info *)
+	    (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE - sizeof(struct ehci_debug_info));
+
+	if (dbg_info->ehci_debug) {
+		dbgp_bulk_write_x(dbg_info, (char*)&data, 1);
+	}
+}
+#endif