openwrt/target/linux/coldfire/patches/026-m5445x_usb_cleanup_2.patch

From b014a8a0b66b1f0f55b3384f586f43e67e6dcc5d Mon Sep 17 00:00:00 2001
From: Bruce Schmid <duck@freescale.com>
Date: Tue, 4 Dec 2007 16:03:17 -0700
Subject: [PATCH] USB: cleanup

LTIBName: m5445x-usb-cleanup-2
Signed-off-by: Duck <duck@freescale.com>
---
 drivers/usb/gadget/mcf5445x_udc.c |   14 ---
 drivers/usb/host/ehci-arc.c       |   19 +---
 drivers/usb/otg/fsl_otg.c         |  225 ++-----------------------------------
 drivers/usb/otg/otg_fsm.h         |    2 +-
 include/linux/usb/fsl_usb2.h      |    5 +-
 5 files changed, 15 insertions(+), 250 deletions(-)

--- a/drivers/usb/gadget/mcf5445x_udc.c
+++ b/drivers/usb/gadget/mcf5445x_udc.c
@@ -321,11 +321,6 @@ static void pullup_enable(struct fsl_udc
 	temp = fsl_readl(&dr_regs->usbcmd);
 	temp |= USB_CMD_RUN_STOP;
 	fsl_writel(temp, &dr_regs->usbcmd);
-
-#ifdef NEVER /* DDD FIXME: we want this? */
-	if (!udc->transceiver)
-		*((u16 *)(MCF_FBCS1_CSAR)) &= ~0x1; /* Enable pullup register */
-#endif
 }
 
 static void pullup_disable(struct fsl_udc *udc)
@@ -345,12 +340,6 @@ static void pullup_disable(struct fsl_ud
 	tmp = fsl_readl(&dr_regs->usbcmd);
 	tmp &= ~USB_CMD_RUN_STOP;
 	fsl_writel(tmp, &dr_regs->usbcmd);
-
-#ifdef NEVER /* DDD FIXME: we want this? */
-	if (!udc->transceiver)
-		*((u16 *)(MCF_FBCS1_CSAR)) |= 0x1; /* Disable pullup register */
-#endif
-
 }
 
 static void dr_controller_run(struct fsl_udc *udc)
@@ -2598,9 +2587,6 @@ static int __init fsl_udc_probe(struct p
 		ret = -ENOMEM;
 		goto err4;
 	}
-#if 0 // DDD why this? hoarks OTG host
-	pullup_disable(udc);
-#endif
 
 	create_proc_file();
 	return 0;
--- a/drivers/usb/host/ehci-arc.c
+++ b/drivers/usb/host/ehci-arc.c
@@ -378,25 +378,14 @@ static int ehci_fsl_drv_resume(struct pl
 
 	memcpy(ehci->regs, (void *)&usb_ehci_regs, sizeof(struct ehci_regs));
 
-#if 0 // DDD test
-	ehci_writel(ehci, usb_ehci_portsc, &ehci->regs->port_status[0]);
-	printk("set portsc %08x  %08x\n", usb_ehci_portsc,
-		ehci_readl(ehci,  &ehci->regs->port_status[0]));
-	printk("set usbmode %08x\n", 
-		ehci_readl(ehci,  &ehci->regs + FSL_SOC_USB_USBMODE));
-
 	tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 	ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
-#else
-	tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
-	ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
-	printk("tmp %08x  set usbmode %08x\n", tmp,
-		ehci_readl(ehci,  hcd->regs + FSL_SOC_USB_USBMODE));
+	pr_debug("tmp %08x  set usbmode %08x\n", tmp,
+		 ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE));
 
 	ehci_writel(ehci, usb_ehci_portsc, &ehci->regs->port_status[0]);
-	printk("set portsc %08x  %08x\n", usb_ehci_portsc,
-		ehci_readl(ehci,  &ehci->regs->port_status[0]));
-#endif
+	pr_debug("set portsc %08x  %08x\n", usb_ehci_portsc,
+		 ehci_readl(ehci, &ehci->regs->port_status[0]));
 
 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	hcd->state = HC_STATE_RUNNING;
--- a/drivers/usb/otg/fsl_otg.c
+++ b/drivers/usb/otg/fsl_otg.c
@@ -98,6 +98,7 @@ static struct fsl_otg_config fsl_otg_ini
 	.otg_port = 1,
 };
 
+#if 0
 static void dump_state(const char *string, struct otg_fsm *fsm)
 {
 	printk(KERN_DEBUG "%s\n\tOTG state: %s\n", string,
@@ -135,6 +136,7 @@ static void dump_state(const char *strin
 	printk(KERN_DEBUG "\tb_sess_vld: %d\n", fsm->b_sess_vld);
 	printk(KERN_DEBUG "\tid: %d\n", fsm->id);
 }
+#endif
 
 
 /* Routines to access transceiver ULPI registers */
@@ -537,6 +539,7 @@ int fsl_otg_start_gadget(struct otg_fsm 
 	return 0;
 }
 
+#if 0
 static void fsl_otg_enable(struct otg_transceiver *otg_p)
 {
 	struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
@@ -549,7 +552,7 @@ static void fsl_otg_enable(struct otg_tr
 	otg_sc |= OTGSC_INTERRUPT_ENABLE_BITS_MASK;
 	otg_sc &= ~OTGSC_IE_1ms_TIMER;
 	otg_sc &= ~OTGSC_CTRL_VBUS_DISCHARGE;
-	otg_sc |= OTGSC_IE_USB_ID;	/* DDD added this */
+	otg_sc |= OTGSC_IE_USB_ID;
 	fsl_writel(otg_sc, &usb_dr_regs->otgsc);
 
 	fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
@@ -570,6 +573,7 @@ static void fsl_otg_enable(struct otg_tr
 	fsm->a_sess_vld = (otg_sc & OTGSC_STS_A_SESSION_VALID) ? 1 : 0;
 	fsm->b_sess_end = (otg_sc & OTGSC_STS_B_SESSION_END) ? 1 : 0;
 }
+#endif
 
 /*
  * Called by initialization code of host driver.  Register host controller
@@ -577,34 +581,6 @@ static void fsl_otg_enable(struct otg_tr
  */
 static int fsl_otg_set_host(struct otg_transceiver *otg_p, struct usb_bus *host)
 {
-#if 0 // DDD beta-final
-	struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
-	struct device *dev = host->controller;
-
-	if (!otg_p || otg_dev != fsl_otg_dev)
-		return -ENODEV;
-
-	otg_p->host = host;
-	otg_p->host->is_b_host = otg_dev->fsm.id;
-
-	otg_dev->fsm.a_bus_drop = 0;
-	otg_dev->fsm.a_bus_req = 1;
-
-	otg_p->host->otg_port = fsl_otg_initdata.otg_port;
-
-	if (dev && dev->driver) {
-		VDBG("suspending host\n");
-		dev->driver->suspend(dev, PMSG_SUSPEND);
-		otg_dev->host_working = 0;
-		VDBG("back\n");
-	}
-
-
-	/* dump_state("set_host running statemachine", &otg_dev->fsm); DDD */
-	otg_statemachine(&otg_dev->fsm);
-
-	return 0;
-#else
 	struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
 
 	if (!otg_p || otg_dev != fsl_otg_dev)
@@ -644,7 +620,6 @@ static int fsl_otg_set_host(struct otg_t
 	otg_statemachine(&otg_dev->fsm);
 
 	return 0;
-#endif
 }
 
 /* Called by initialization code of udc.  Register udc to OTG.*/
@@ -673,12 +648,6 @@ static int fsl_otg_set_peripheral(struct
 
 	otg_dev->fsm.b_bus_req = 1;
 
-#if 0 /* DDD uClinux */
-	if (otg_p->host) {
-		fsl_otg_enable(otg_p);
-		otg_statemachine(&otg_dev->fsm);
-	}
-#endif
 	/* start the gadget right away if the ID pin says Mini-B */
 	DBG("ID pin=%d\n", otg_dev->fsm.id);
 	if (otg_dev->fsm.id == 1) {
@@ -815,162 +784,6 @@ irqreturn_t fsl_otg_isr(int irq, void *d
 }
 
 
-#if 0 // DDD feta-final
-irqreturn_t foo_fsl_otg_isr(int irq, void *dev_id)
-{
-	struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
-	struct otg_transceiver *otg = &((struct fsl_otg *)dev_id)->otg;
-	u32 otg_int_src, usb_int_src, otg_sc;
-	int trigger = 0;
-	int tmp;
-
-	usb_int_src = fsl_readl(&usb_dr_regs->usbsts);
-	otg_sc = fsl_readl(&usb_dr_regs->otgsc);
-	otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8);
-
-	/* Only clear otg interrupts */
-	fsl_writel(otg_sc, &usb_dr_regs->otgsc);
-
-	/*FIXME: ID change not generate when init to 0 */
-	/* process OTG interrupts */
-	if (otg_int_src) {
-		VDBG("\nOTG irq 0x%08x\n", otg_int_src);
-		if (otg_int_src & OTGSC_INTSTS_1MS_TIMER)
-			trigger = fsl_otg_tick_timer();
-
-		if (otg_int_src & OTGSC_INTSTS_USB_ID) {
-			fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0;
-			otg->default_a = (fsm->id == 0);
-			if (otg->host)
-				otg->host->is_b_host = fsm->id;
-			if (otg->gadget)
-				otg->gadget->is_a_peripheral = !fsm->id;
-			VDBG("IRQ=ID now=%d\n", fsm->id);
-
-			if (fsm->id) {	/* switch to gadget */
-				schedule_delayed_work(&((struct fsl_otg *)
-							dev_id)->otg_event, 25);
-			} else {	/* switch to host */
-				cancel_delayed_work(&
-						    ((struct fsl_otg *)dev_id)->
-						    otg_event);
-				fsl_otg_start_gadget(fsm, 0);
-				fsl_otg_drv_vbus(1);
-				fsl_otg_start_host(fsm, 1);
-			}
-
-			return IRQ_HANDLED;
-		}
-		if (otg_int_src & OTGSC_INTSTS_DATA_PULSE) {
-			fsm->a_srp_det = 1;
-			trigger = 1;
-			VDBG("!!!!Data pulse int\n");
-		}
-		if (otg_int_src & OTGSC_INTSTS_A_SESSION_VALID) {
-			fsm->a_sess_vld =
-			    (otg_sc & OTGSC_STS_A_SESSION_VALID) ? 1 : 0;
-			/* detect VBUS pulsing */
-			if ((fsm->transceiver->state == OTG_STATE_A_IDLE)
-			    && fsm->a_sess_vld)
-				fsm->a_srp_det = 1;
-			trigger = 1;
-			VDBG("!!!a_sess_vld int state=%d\n", fsm->a_sess_vld);
-		}
-		if (otg_int_src & OTGSC_INTSTS_A_VBUS_VALID) {
-			fsm->a_vbus_vld = !!(otg_sc & OTGSC_STS_A_VBUS_VALID);
-			trigger = 1;
-			VDBG("!!!a_vbus_vld int state=%d\n", fsm->a_vbus_vld);
-
-#if 1
-		if ((fsm->a_vbus_vld == 0) && (fsm->id == 0)) {
-			if (fsm->transceiver->state != OTG_STATE_A_WAIT_VFALL)
-				/* Warning insted of transfer to Error state. */
-				printk(KERN_WARNING "ulpi: The USB Device is "
-				       "sinking too much current!!\n");
-			fsm->a_vbus_vld = 1;
-		}
-#endif
-
-
-		}
-		if (otg_int_src & OTGSC_INTSTS_B_SESSION_VALID) {
-			fsm->b_sess_vld =
-			    (otg_sc & OTGSC_STS_B_SESSION_VALID) ? 1 : 0;
-			trigger = 1;
-			/* SRP done */
-			if ((fsl_otg_dev->otg.state == OTG_STATE_B_SRP_INIT) &&
-			    fsm->b_sess_vld && srp_wait_done)
-				fsm->b_srp_done = 1;
-			VDBG("!!!!b_sess_vld int state=%d\n", fsm->b_sess_vld);
-		}
-		if (otg_int_src & OTGSC_INTSTS_B_SESSION_END) {
-			fsm->b_sess_end =
-			    (otg_sc & OTGSC_STS_B_SESSION_END) ? 1 : 0;
-			trigger = 1;
-			VDBG("!!!!b_sess_end int state=%d\n", fsm->b_sess_end);
-		}
-	}
-
-	/* process USB interrupts */
-	if ((usb_int_src & USB_STS_PORT_CHANGE)
-	    && (fsm->protocol == PROTO_HOST)) {
-		VDBG("\nUSB irq A 0x%08x\n", usb_int_src);
-		/* Device resume do not generate statemachine change */
-		if (fsl_readl(&usb_dr_regs->portsc1) &
-		    PORTSCX_PORT_FORCE_RESUME) {
-			if (otg->default_a) {
-				fsm->b_bus_resume = 1;
-				trigger = 1;
-			} else {
-				fsm->a_bus_resume = 1;
-				trigger = 1;
-			}
-		}
-
-		tmp = (fsl_readl(&usb_dr_regs->portsc1) &
-		       PORTSCX_CURRENT_CONNECT_STATUS) ? 1 : 0;
-		if (otg->default_a && (fsm->b_conn != tmp)) {
-			fsm->b_conn = tmp;
-			trigger = 1;
-		} else if (!otg->default_a && (fsm->a_conn != tmp)) {
-			fsm->a_conn = tmp;
-			trigger = 1;
-		}
-	}
-	/* Workaround: sometimes CSC bit will lost.  We change to
-	 * polling CCS bit for connect change */
-	if (fsm->protocol == PROTO_GADGET) {
-		if (usb_int_src & USB_STS_SUSPEND) {
-			VDBG("\nUSB irq B 0x%08x\n", usb_int_src);
-			VDBG("peripheral detected suspend\n");
-			if (otg->default_a)
-				/* A-device detects B suspend */
-				fsm->b_bus_suspend = 1;
-			else
-				/* B-device detects A suspend */
-				fsm->a_bus_suspend = 1;
-			trigger = 1;
-		} else if (usb_int_src & USB_STS_PORT_CHANGE) {
-			VDBG("\nUSB irq C 0x%08x\n", usb_int_src);
-			VDBG("peripheral resumed\n");
-			if (otg->default_a)
-				fsm->b_bus_suspend = 0;
-			else
-				fsm->a_bus_suspend = 0;
-			trigger = 1;
-		}
-	}
-
-	/* Invoke statemachine until state is stable */
-	while (trigger) {
-		trigger = otg_statemachine(fsm);
-	}
-
-	return IRQ_HANDLED;
-}
-#endif
-
-
 static struct otg_fsm_ops fsl_otg_ops = {
 	.chrg_vbus = fsl_otg_chrg_vbus,
 	.drv_vbus = fsl_otg_drv_vbus,
@@ -1003,7 +816,6 @@ int fsl_otg_cfg(struct platform_device *
 	if (!fsl_otg_tc)
 		return -ENODEV;
 
-#if 1 // DDD
 	if (pdata->regs) {
 		fsl_otg_tc->dr_mem_map = pdata->regs;
 	} else {
@@ -1013,8 +825,10 @@ int fsl_otg_cfg(struct platform_device *
 			return -ENODEV;
 		}
 
+		/*
 		printk("DDD %s(): rsrc_start=0x%x  rsrc_len=0x%x\n",
 		     __FUNCTION__, res->start, res->end - res->start + 1);
+		*/
 
 		if (!request_mem_region(res->start, res->end - res->start + 1,
 					"OTG")) {
@@ -1026,7 +840,6 @@ int fsl_otg_cfg(struct platform_device *
 	}
 	DBG("set dr_mem_map to 0x%p\n", fsl_otg_tc->dr_mem_map);
 
-#endif 
 	INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event);
 
 	INIT_LIST_HEAD(&active_timers);
@@ -1035,12 +848,11 @@ int fsl_otg_cfg(struct platform_device *
 	/* Set OTG state machine operations */
 	fsl_otg_tc->fsm.ops = &fsl_otg_ops;
 
-#if 1 /* DDD */
 	/* record initial state of ID pin */
 	fsl_otg_tc->fsm.id = (fsl_otg_tc->dr_mem_map->otgsc & OTGSC_STS_USB_ID)
 	    ? 1 : 0;
 	DBG("initial ID pin=%d\n", fsl_otg_tc->fsm.id);
-#endif
+
 	/* initialize the otg structure */
 	fsl_otg_tc->otg.label = DRIVER_DESC;
 	fsl_otg_tc->otg.set_host = fsl_otg_set_host;
@@ -1115,13 +927,8 @@ int usb_otg_start(struct platform_device
 			__FUNCTION__, timeout);
 
 	/* configure the VBUSHS as IDLE(both host and device) */
-#if 0
-	/* DDD really have to check into setting the following */
-	fsl_writel(USB_MODE_STREAM_DISABLE, &usb_dr_regs->usbmode);
-#else
 	temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USBMODE_ES : 0);
 	fsl_writel(temp, &usb_dr_regs->usbmode);
-#endif
 
 	/* configure PHY interface */
 	temp = fsl_readl(&usb_dr_regs->portsc1);
@@ -1135,24 +942,11 @@ int usb_otg_start(struct platform_device
 	/* disable all interrupt and clear all OTGSC status */
 	temp = fsl_readl(&usb_dr_regs->otgsc);
 	temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK;
-#if 0 // DDD
-	/* DDD only want ID int
-	 * temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
-	 */
-	temp |= OTGSC_IE_USB_ID;	/* DDD added this */
-	temp &= ~OTGSC_IE_1ms_TIMER;	/* DDD added this */
-#else
 	temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE;
-#endif
 	fsl_writel(temp, &usb_dr_regs->otgsc);
 
 	fsl_otg_drv_vbus(0);
 
-#if 0 // DDD beta-final
-	temp = fsl_readl(&usb_dr_regs->otgsc);
-	temp |= OTGSC_IE_A_SESSION_VALID;
-	fsl_writel(temp, &usb_dr_regs->otgsc);
-#else
 	/*
 	 * The identification (id) input is FALSE when a Mini-A plug is inserted
 	 * in the devices Mini-AB receptacle. Otherwise, this input is TRUE.
@@ -1173,7 +967,6 @@ int usb_otg_start(struct platform_device
 	temp |= OTGSC_IE_USB_ID;
 	temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_IE_1ms_TIMER);
 	fsl_writel(temp, &usb_dr_regs->otgsc);
-#endif
 
 	return 0;
 }
@@ -1427,10 +1220,8 @@ static int __init fsl_otg_probe(struct p
 		return -ENOMEM;
 
 	pdata = pdev->dev.platform_data;
-#if 1 // DDD do this elsewhere
 	/* Initialize the clock, multiplexing pin and PHY interface */
 	board_init(pdev);
-#endif
 
 	/* configure the OTG */
 	status = fsl_otg_cfg(pdev);
--- a/drivers/usb/otg/otg_fsm.h
+++ b/drivers/usb/otg/otg_fsm.h
@@ -18,7 +18,7 @@
 #ifndef OTG_FSM_H
 #define OTG_FSM_H
 
-#if 1
+#if 0
 #define DEBUG 	1
 #define VERBOSE 	1
 #endif
--- a/include/linux/usb/fsl_usb2.h
+++ b/include/linux/usb/fsl_usb2.h
@@ -104,9 +104,8 @@ struct fsl_usb_host_regs {
 #if 0
 	u32 endptctrl[USB_MAX_ENDPOINTS]; /* Endpoint Control Registers */
 #else
-	// DDD: do these exits in the host register set??
-	// DDD see DCCPARAMS:DEN for the real number of device endpoints
-	// DDD 16 is the max
+	/* DDD see DCCPARAMS:DEN for the real number of device endpoints */
+	/* DDD 16 is the max */
 	u32 endptctrl[16];	/* Endpoint Control Registers */
 #endif
 };