USB: EHCI: remove ehci_port_power() routine

This patch (as1623) removes the ehci_port_power() routine and all the
places that call it. There's no reason for ehci-hcd to change the
port power settings; the hub driver takes care of all that stuff.

There is one exception: When the controller is resumed from
hibernation or following a loss of power, the ports that are supposed
to be handed over to a companion controller must be powered on first.
Otherwise the handover won't work. This process is not visible to the
hub driver, so it has to be handled in ehci-hcd.

Signed-off-by: Alan Stern <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

arch/arm/mach-cns3xxx/cns3420vb.c

···
 }
 
 static struct usb_ehci_pdata cns3xxx_usb_ehci_pdata = {
-	.port_power_off	= 1,
 	.power_on	= csn3xxx_usb_power_on,
 	.power_off	= csn3xxx_usb_power_off,
 };

arch/mips/ath79/dev-usb.c

···
 
 static struct usb_ehci_pdata ath79_ehci_pdata_v1 = {
 	.has_synopsys_hc_bug	= 1,
-	.port_power_off		= 1,
 };
 
 static struct usb_ehci_pdata ath79_ehci_pdata_v2 = {
 	.caps_offset		= 0x100,
 	.has_tt			= 1,
-	.port_power_off		= 1,
 };
 
 static struct platform_device ath79_ehci_device = {

arch/mips/loongson1/common/platform.c

···
 };
 
 static struct usb_ehci_pdata ls1x_ehci_pdata = {
-	.port_power_off	= 1,
 };
 
 struct platform_device ls1x_ehci_device = {

drivers/usb/chipidea/host.c

···
 #include "bits.h"
 #include "host.h"
 
-static int ci_ehci_setup(struct usb_hcd *hcd)
-{
-	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int ret;
-
-	hcd->has_tt = 1;
-
-	ret = ehci_setup(hcd);
-	if (ret)
-		return ret;
-
-	ehci_port_power(ehci, 0);
-
-	return ret;
-}
-
 static const struct hc_driver ci_ehci_hc_driver = {
 	.description	= "ehci_hcd",
 	.product_desc	= "ChipIdea HDRC EHCI",
···
 	/*
 	 * basic lifecycle operations
 	 */
-	.reset		= ci_ehci_setup,
+	.reset		= ehci_setup,
 	.start		= ehci_run,
 	.stop		= ehci_stop,
 	.shutdown	= ehci_shutdown,

drivers/usb/host/ehci-atmel.c

···
 static int ehci_atmel_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int retval;
 
 	/* registers start at offset 0x0 */
 	ehci->caps = hcd->regs;
 
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	ehci_port_power(ehci, 0);
-
-	return retval;
+	return ehci_setup(hcd);
 }
 
 static const struct hc_driver ehci_atmel_hc_driver = {

drivers/usb/host/ehci-fsl.c

···
 {
 	if (ehci_fsl_usb_setup(ehci))
 		return -EINVAL;
-	ehci_port_power(ehci, 0);
 
 	return 0;
 }

drivers/usb/host/ehci-grlib.c

···
 
 #define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
 
-/* called during probe() after chip reset completes */
-static int ehci_grlib_setup(struct usb_hcd *hcd)
-{
-	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);
-	int		retval;
-
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	ehci_port_power(ehci, 1);
-
-	return retval;
-}
-
-
 static const struct hc_driver ehci_grlib_hc_driver = {
 	.description		= hcd_name,
 	.product_desc		= "GRLIB GRUSBHC EHCI",
···
 	/*
 	 * basic lifecycle operations
 	 */
-	.reset			= ehci_grlib_setup,
+	.reset			= ehci_setup,
 	.start			= ehci_run,
 	.stop			= ehci_stop,
 	.shutdown		= ehci_shutdown,

drivers/usb/host/ehci-hcd.c

···
 	hrtimer_cancel(&ehci->hrtimer);
 }
 
-static void ehci_port_power (struct ehci_hcd *ehci, int is_on)
-{
-	unsigned port;
-
-	if (!HCS_PPC (ehci->hcs_params))
-		return;
-
-	ehci_dbg (ehci, "...power%s ports...\n", is_on ? "up" : "down");
-	for (port = HCS_N_PORTS (ehci->hcs_params); port > 0; )
-		(void) ehci_hub_control(ehci_to_hcd(ehci),
-				is_on ? SetPortFeature : ClearPortFeature,
-				USB_PORT_FEAT_POWER,
-				port--, NULL, 0);
-	/* Flush those writes */
-	ehci_readl(ehci, &ehci->regs->command);
-	msleep(20);
-}
-
 /*-------------------------------------------------------------------------*/
 
 /*
···
 
 	ehci->rh_state = EHCI_RH_SUSPENDED;
 	spin_unlock_irq(&ehci->lock);
-
-	/* here we "know" root ports should always stay powered */
-	ehci_port_power(ehci, 1);
 
 	return 1;
 }

drivers/usb/host/ehci-hub.c

···
 	if (!ehci->owned_ports)
 		return;
 
+	/* Make sure the ports are powered */
+	port = HCS_N_PORTS(ehci->hcs_params);
+	while (port--) {
+		if (test_bit(port, &ehci->owned_ports)) {
+			reg = &ehci->regs->port_status[port];
+			status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
+			if (!(status & PORT_POWER)) {
+				status |= PORT_POWER;
+				ehci_writel(ehci, status, reg);
+			}
+		}
+	}
+
 	/* Give the connections some time to appear */
 	msleep(20);
 

drivers/usb/host/ehci-msm.c

···
 	/* Disable streaming mode and select host mode */
 	writel(0x13, USB_USBMODE);
 
-	ehci_port_power(ehci, 1);
 	return 0;
 }
 

drivers/usb/host/ehci-mxc.c

···
 static int ehci_mxc_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int retval;
 
 	hcd->has_tt = 1;
 
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	ehci_port_power(ehci, 0);
-	return 0;
+	return ehci_setup(hcd);
 }
 
 static const struct hc_driver ehci_mxc_hc_driver = {

drivers/usb/host/ehci-octeon.c

···
 
 	platform_set_drvdata(pdev, hcd);
 
-	/* root ports should always stay powered */
-	ehci_port_power(ehci, 1);
-
 	return 0;
 err3:
 	ehci_octeon_stop();

drivers/usb/host/ehci-omap.c

···
 			gpio_set_value_cansleep(pdata->reset_gpio_port[1], 1);
 	}
 
-	/* root ports should always stay powered */
-	ehci_port_power(ehci, 1);
-
 	return rc;
 }
 

drivers/usb/host/ehci-orion.c

···
 	wrl(USB_MODE, 0x13);
 }
 
-static int ehci_orion_setup(struct usb_hcd *hcd)
-{
-	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int retval;
-
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	ehci_port_power(ehci, 0);
-
-	return retval;
-}
-
 static const struct hc_driver ehci_orion_hc_driver = {
 	.description = hcd_name,
 	.product_desc = "Marvell Orion EHCI",
···
 	/*
 	 * basic lifecycle operations
 	 */
-	.reset = ehci_orion_setup,
+	.reset = ehci_setup,
 	.start = ehci_run,
 	.stop = ehci_stop,
 	.shutdown = ehci_shutdown,

drivers/usb/host/ehci-pci.c

···
 		ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
 #endif
 
-	ehci_port_power(ehci, 1);
 	retval = ehci_pci_reinit(ehci, pdev);
 done:
 	return retval;

drivers/usb/host/ehci-platform.c

···
 
 	if (pdata->no_io_watchdog)
 		ehci->need_io_watchdog = 0;
-	if (pdata->port_power_on)
-		ehci_port_power(ehci, 1);
-	if (pdata->port_power_off)
-		ehci_port_power(ehci, 0);
-
 	return 0;
 }
 

drivers/usb/host/ehci-pmcmsp.c

···
 		return retval;
 
 	usb_hcd_tdi_set_mode(ehci);
-	ehci_port_power(ehci, 0);
 
 	return retval;
 }

drivers/usb/host/ehci-sh.c

···
 static int ehci_sh_reset(struct usb_hcd *hcd)
 {
 	struct ehci_hcd	*ehci = hcd_to_ehci(hcd);
-	int ret;
 
 	ehci->caps = hcd->regs;
 
-	ret = ehci_setup(hcd);
-	if (unlikely(ret))
-		return ret;
-
-	ehci_port_power(ehci, 0);
-
-	return ret;
+	return ehci_setup(hcd);
 }
 
 static const struct hc_driver ehci_sh_hc_driver = {

drivers/usb/host/ehci-spear.c

···
 static int ehci_spear_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int retval = 0;
 
 	/* registers start at offset 0x0 */
 	ehci->caps = hcd->regs;
 
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	ehci_port_power(ehci, 0);
-
-	return retval;
+	return ehci_setup(hcd);
 }
 
 static const struct hc_driver ehci_spear_hc_driver = {

drivers/usb/host/ehci-tegra.c

···
 static int tegra_ehci_setup(struct usb_hcd *hcd)
 {
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-	int retval;
 
 	/* EHCI registers start at offset 0x100 */
 	ehci->caps = hcd->regs + 0x100;
···
 	/* switch to host mode */
 	hcd->has_tt = 1;
 
-	retval = ehci_setup(hcd);
-	if (retval)
-		return retval;
-
-	ehci_port_power(ehci, 1);
-	return retval;
+	return ehci_setup(hcd);
 }
 
 struct dma_aligned_buffer {

include/linux/usb/ehci_pdriver.h

···
 	unsigned	has_synopsys_hc_bug:1;
 	unsigned	big_endian_desc:1;
 	unsigned	big_endian_mmio:1;
-	unsigned	port_power_on:1;
-	unsigned	port_power_off:1;
 	unsigned	no_io_watchdog:1;
 
 	/* Turn on all power and clocks */