USB: UHCI: Wrap I/O register accesses

This patch is part of a series that extend the UHCI HCD to support
non-PCI controllers.

This patch replaces in{b,w,l} and out{b,wl} with calls to local inline
functions. This is done so that the register access functions can be
extended to support register areas not mapped in PCI I/O space.

Signed-off-by: Jan Andersson <jan@gaisler.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/uhci-debug.c

@@ -285,7 +285,6 @@ static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
 static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
 {
 	char *out = buf;
-	unsigned long io_addr = uhci->io_addr;
 	unsigned short usbcmd, usbstat, usbint, usbfrnum;
 	unsigned int flbaseadd;
 	unsigned char sof;
@@ -295,14 +294,14 @@ static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
 	if (len < 80 * 9)
 		return 0;
 
-	usbcmd    = inw(io_addr + 0);
-	usbstat   = inw(io_addr + 2);
-	usbint    = inw(io_addr + 4);
-	usbfrnum  = inw(io_addr + 6);
-	flbaseadd = inl(io_addr + 8);
-	sof       = inb(io_addr + 12);
-	portsc1   = inw(io_addr + 16);
-	portsc2   = inw(io_addr + 18);
+	usbcmd    = uhci_readw(uhci, 0);
+	usbstat   = uhci_readw(uhci, 2);
+	usbint    = uhci_readw(uhci, 4);
+	usbfrnum  = uhci_readw(uhci, 6);
+	flbaseadd = uhci_readl(uhci, 8);
+	sof       = uhci_readb(uhci, 12);
+	portsc1   = uhci_readw(uhci, 16);
+	portsc2   = uhci_readw(uhci, 18);
 
 	out += sprintf(out, "  usbcmd    =     %04x   %s%s%s%s%s%s%s%s\n",
 		usbcmd,

drivers/usb/host/uhci-hcd.c

@@ -133,7 +133,7 @@ static void finish_reset(struct uhci_hcd *uhci)
 	 * We have to clear them by hand.
 	 */
 	for (port = 0; port < uhci->rh_numports; ++port)
-		outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
+		uhci_writew(uhci, 0, USBPORTSC1 + (port * 2));
 
 	uhci->port_c_suspend = uhci->resuming_ports = 0;
 	uhci->rh_state = UHCI_RH_RESET;
@@ -173,14 +173,14 @@ static void check_and_reset_hc(struct uhci_hcd *uhci)
 static void configure_hc(struct uhci_hcd *uhci)
 {
 	/* Set the frame length to the default: 1 ms exactly */
-	outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
+	uhci_writeb(uhci, USBSOF_DEFAULT, USBSOF);
 
 	/* Store the frame list base address */
-	outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
+	uhci_writel(uhci, uhci->frame_dma_handle, USBFLBASEADD);
 
 	/* Set the current frame number */
-	outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER,
-			uhci->io_addr + USBFRNUM);
+	uhci_writew(uhci, uhci->frame_number & UHCI_MAX_SOF_NUMBER,
+			USBFRNUM);
 
 	/* perform any arch/bus specific configuration */
 	if (uhci->configure_hc)
@@ -264,8 +264,8 @@ __acquires(uhci->lock)
 			!int_enable)
 		uhci->RD_enable = int_enable = 0;
 
-	outw(int_enable, uhci->io_addr + USBINTR);
-	outw(egsm_enable | USBCMD_CF, uhci->io_addr + USBCMD);
+	uhci_writew(uhci, int_enable, USBINTR);
+	uhci_writew(uhci, egsm_enable | USBCMD_CF, USBCMD);
 	mb();
 	udelay(5);
 
@@ -274,7 +274,7 @@ __acquires(uhci->lock)
 	 * controller should stop after a few microseconds.  Otherwise
 	 * we will give the controller one frame to stop.
 	 */
-	if (!auto_stop && !(inw(uhci->io_addr + USBSTS) & USBSTS_HCH)) {
+	if (!auto_stop && !(uhci_readw(uhci, USBSTS) & USBSTS_HCH)) {
 		uhci->rh_state = UHCI_RH_SUSPENDING;
 		spin_unlock_irq(&uhci->lock);
 		msleep(1);
@@ -282,7 +282,7 @@ __acquires(uhci->lock)
 		if (uhci->dead)
 			return;
 	}
-	if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
+	if (!(uhci_readw(uhci, USBSTS) & USBSTS_HCH))
 		dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
 
 	uhci_get_current_frame_number(uhci);
@@ -309,9 +309,9 @@ static void start_rh(struct uhci_hcd *uhci)
 	/* Mark it configured and running with a 64-byte max packet.
 	 * All interrupts are enabled, even though RESUME won't do anything.
 	 */
-	outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->io_addr + USBCMD);
-	outw(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
-			uhci->io_addr + USBINTR);
+	uhci_writew(uhci, USBCMD_RS | USBCMD_CF | USBCMD_MAXP, USBCMD);
+	uhci_writew(uhci, USBINTR_TIMEOUT | USBINTR_RESUME |
+		USBINTR_IOC | USBINTR_SP, USBINTR);
 	mb();
 	uhci->rh_state = UHCI_RH_RUNNING;
 	set_bit(HCD_FLAG_POLL_RH, &uhci_to_hcd(uhci)->flags);
@@ -334,9 +334,9 @@ __acquires(uhci->lock)
 		unsigned egsm;
 
 		/* Keep EGSM on if it was set before */
-		egsm = inw(uhci->io_addr + USBCMD) & USBCMD_EGSM;
+		egsm = uhci_readw(uhci, USBCMD) & USBCMD_EGSM;
 		uhci->rh_state = UHCI_RH_RESUMING;
-		outw(USBCMD_FGR | USBCMD_CF | egsm, uhci->io_addr + USBCMD);
+		uhci_writew(uhci, USBCMD_FGR | USBCMD_CF | egsm, USBCMD);
 		spin_unlock_irq(&uhci->lock);
 		msleep(20);
 		spin_lock_irq(&uhci->lock);
@@ -344,10 +344,10 @@ __acquires(uhci->lock)
 			return;
 
 		/* End Global Resume and wait for EOP to be sent */
-		outw(USBCMD_CF, uhci->io_addr + USBCMD);
+		uhci_writew(uhci, USBCMD_CF, USBCMD);
 		mb();
 		udelay(4);
-		if (inw(uhci->io_addr + USBCMD) & USBCMD_FGR)
+		if (uhci_readw(uhci, USBCMD) & USBCMD_FGR)
 			dev_warn(uhci_dev(uhci), "FGR not stopped yet!\n");
 	}
 
@@ -367,10 +367,10 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
 	 * interrupt cause.  Contrary to the UHCI specification, the
 	 * "HC Halted" status bit is persistent: it is RO, not R/WC.
 	 */
-	status = inw(uhci->io_addr + USBSTS);
+	status = uhci_readw(uhci, USBSTS);
 	if (!(status & ~USBSTS_HCH))	/* shared interrupt, not mine */
 		return IRQ_NONE;
-	outw(status, uhci->io_addr + USBSTS);		/* Clear it */
+	uhci_writew(uhci, status, USBSTS);		/* Clear it */
 
 	if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
 		if (status & USBSTS_HSE)
@@ -426,7 +426,7 @@ static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
 	if (!uhci->is_stopped) {
 		unsigned delta;
 
-		delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) &
+		delta = (uhci_readw(uhci, USBFRNUM) - uhci->frame_number) &
 				(UHCI_NUMFRAMES - 1);
 		uhci->frame_number += delta;
 	}
@@ -716,7 +716,7 @@ static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
 	/* Minimize latency by avoiding the spinlock */
 	frame_number = uhci->frame_number;
 	barrier();
-	delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) &
+	delta = (uhci_readw(uhci, USBFRNUM) - frame_number) &
 			(UHCI_NUMFRAMES - 1);
 	return frame_number + delta;
 }
@@ -739,7 +739,7 @@ static int uhci_count_ports(struct usb_hcd *hcd)
 	for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) {
 		unsigned int portstatus;
 
-		portstatus = inw(uhci->io_addr + USBPORTSC1 + (port * 2));
+		portstatus = uhci_readw(uhci, USBPORTSC1 + (port * 2));
 		if (!(portstatus & 0x0080) || portstatus == 0xffff)
 			break;
 	}

drivers/usb/host/uhci-hcd.h

@@ -481,4 +481,34 @@ struct urb_priv {
 #define PCI_VENDOR_ID_GENESYS		0x17a0
 #define PCI_DEVICE_ID_GL880S_UHCI	0x8083
 
+static inline u32 uhci_readl(struct uhci_hcd *uhci, int reg)
+{
+	return inl(uhci->io_addr + reg);
+}
+
+static inline void uhci_writel(struct uhci_hcd *uhci, u32 val, int reg)
+{
+	outl(val, uhci->io_addr + reg);
+}
+
+static inline u16 uhci_readw(struct uhci_hcd *uhci, int reg)
+{
+	return inw(uhci->io_addr + reg);
+}
+
+static inline void uhci_writew(struct uhci_hcd *uhci, u16 val, int reg)
+{
+	outw(val, uhci->io_addr + reg);
+}
+
+static inline u8 uhci_readb(struct uhci_hcd *uhci, int reg)
+{
+	return inb(uhci->io_addr + reg);
+}
+
+static inline void uhci_writeb(struct uhci_hcd *uhci, u8 val, int reg)
+{
+	outb(val, uhci->io_addr + reg);
+}
+
 #endif

drivers/usb/host/uhci-hub.c

@@ -44,7 +44,7 @@ static int any_ports_active(struct uhci_hcd *uhci)
 	int port;
 
 	for (port = 0; port < uhci->rh_numports; ++port) {
-		if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) &
+		if ((uhci_readw(uhci, USBPORTSC1 + port * 2) &
 				(USBPORTSC_CCS | RWC_BITS)) ||
 				test_bit(port, &uhci->port_c_suspend))
 			return 1;
@@ -68,7 +68,7 @@ static inline int get_hub_status_data(struct uhci_hcd *uhci, char *buf)
 
 	*buf = 0;
 	for (port = 0; port < uhci->rh_numports; ++port) {
-		if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) & mask) ||
+		if ((uhci_readw(uhci, USBPORTSC1 + port * 2) & mask) ||
 				test_bit(port, &uhci->port_c_suspend))
 			*buf |= (1 << (port + 1));
 	}
@@ -78,17 +78,17 @@ static inline int get_hub_status_data(struct uhci_hcd *uhci, char *buf)
 #define OK(x)			len = (x); break
 
 #define CLR_RH_PORTSTAT(x) \
-	status = inw(port_addr); \
+	status = uhci_readw(uhci, port_addr);	\
 	status &= ~(RWC_BITS|WZ_BITS); \
 	status &= ~(x); \
 	status |= RWC_BITS & (x); \
-	outw(status, port_addr)
+	uhci_writew(uhci, status, port_addr)
 
 #define SET_RH_PORTSTAT(x) \
-	status = inw(port_addr); \
+	status = uhci_readw(uhci, port_addr);	\
 	status |= (x); \
 	status &= ~(RWC_BITS|WZ_BITS); \
-	outw(status, port_addr)
+	uhci_writew(uhci, status, port_addr)
 
 /* UHCI controllers don't automatically stop resume signalling after 20 msec,
  * so we have to poll and check timeouts in order to take care of it.
@@ -99,7 +99,7 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
 	int status;
 	int i;
 
-	if (inw(port_addr) & SUSPEND_BITS) {
+	if (uhci_readw(uhci, port_addr) & SUSPEND_BITS) {
 		CLR_RH_PORTSTAT(SUSPEND_BITS);
 		if (test_bit(port, &uhci->resuming_ports))
 			set_bit(port, &uhci->port_c_suspend);
@@ -110,7 +110,7 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
 		 * Experiments show that some controllers take longer, so
 		 * we'll poll for completion. */
 		for (i = 0; i < 10; ++i) {
-			if (!(inw(port_addr) & SUSPEND_BITS))
+			if (!(uhci_readw(uhci, port_addr) & SUSPEND_BITS))
 				break;
 			udelay(1);
 		}
@@ -121,12 +121,12 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port,
 /* Wait for the UHCI controller in HP's iLO2 server management chip.
  * It can take up to 250 us to finish a reset and set the CSC bit.
  */
-static void wait_for_HP(unsigned long port_addr)
+static void wait_for_HP(struct uhci_hcd *uhci, unsigned long port_addr)
 {
 	int i;
 
 	for (i = 10; i < 250; i += 10) {
-		if (inw(port_addr) & USBPORTSC_CSC)
+		if (uhci_readw(uhci, port_addr) & USBPORTSC_CSC)
 			return;
 		udelay(10);
 	}
@@ -140,8 +140,8 @@ static void uhci_check_ports(struct uhci_hcd *uhci)
 	int status;
 
 	for (port = 0; port < uhci->rh_numports; ++port) {
-		port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
-		status = inw(port_addr);
+		port_addr = USBPORTSC1 + 2 * port;
+		status = uhci_readw(uhci, port_addr);
 		if (unlikely(status & USBPORTSC_PR)) {
 			if (time_after_eq(jiffies, uhci->ports_timeout)) {
 				CLR_RH_PORTSTAT(USBPORTSC_PR);
@@ -150,7 +150,7 @@ static void uhci_check_ports(struct uhci_hcd *uhci)
 				/* HP's server management chip requires
 				 * a longer delay. */
 				if (uhci->wait_for_hp)
-					wait_for_HP(port_addr);
+					wait_for_HP(uhci, port_addr);
 
 				/* If the port was enabled before, turning
 				 * reset on caused a port enable change.
@@ -241,7 +241,7 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 	int status, lstatus, retval = 0, len = 0;
 	unsigned int port = wIndex - 1;
-	unsigned long port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
+	unsigned long port_addr = USBPORTSC1 + 2 * port;
 	u16 wPortChange, wPortStatus;
 	unsigned long flags;
 
@@ -259,7 +259,7 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			goto err;
 
 		uhci_check_ports(uhci);
-		status = inw(port_addr);
+		status = uhci_readw(uhci, port_addr);
 
 		/* Intel controllers report the OverCurrent bit active on.
 		 * VIA controllers report it active off, so we'll adjust the
@@ -356,7 +356,7 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			CLR_RH_PORTSTAT(USBPORTSC_PEC);
 			OK(0);
 		case USB_PORT_FEAT_SUSPEND:
-			if (!(inw(port_addr) & USBPORTSC_SUSP)) {
+			if (!(uhci_readw(uhci, port_addr) & USBPORTSC_SUSP)) {
 
 				/* Make certain the port isn't suspended */
 				uhci_finish_suspend(uhci, port, port_addr);
@@ -368,7 +368,8 @@ static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				 * if the port is disabled.  When this happens
 				 * just skip the Resume signalling.
 				 */
-				if (!(inw(port_addr) & USBPORTSC_RD))
+				if (!(uhci_readw(uhci, port_addr) &
+						USBPORTSC_RD))
 					uhci_finish_suspend(uhci, port,
 							port_addr);
 				else