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authorAlan Stern <stern@rowland.harvard.edu>2012-10-31 13:21:06 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-31 12:48:07 -0700
commitc73cee717e7d5da0698acb720ad1219646fe4f46 (patch)
tree7905e61101886695d291e39c7c2ee4042e2e6f70 /drivers/usb
parent4968f951913997adc8c68c4e986e8168ee1d2998 (diff)
downloadlinux-stericsson-c73cee717e7d5da0698acb720ad1219646fe4f46.tar.gz
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 <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/chipidea/host.c18
-rw-r--r--drivers/usb/host/ehci-atmel.c9
-rw-r--r--drivers/usb/host/ehci-fsl.c1
-rw-r--r--drivers/usb/host/ehci-grlib.c18
-rw-r--r--drivers/usb/host/ehci-hcd.c21
-rw-r--r--drivers/usb/host/ehci-hub.c13
-rw-r--r--drivers/usb/host/ehci-msm.c1
-rw-r--r--drivers/usb/host/ehci-mxc.c8
-rw-r--r--drivers/usb/host/ehci-octeon.c3
-rw-r--r--drivers/usb/host/ehci-omap.c3
-rw-r--r--drivers/usb/host/ehci-orion.c16
-rw-r--r--drivers/usb/host/ehci-pci.c1
-rw-r--r--drivers/usb/host/ehci-platform.c5
-rw-r--r--drivers/usb/host/ehci-pmcmsp.c1
-rw-r--r--drivers/usb/host/ehci-sh.c9
-rw-r--r--drivers/usb/host/ehci-spear.c9
-rw-r--r--drivers/usb/host/ehci-tegra.c8
17 files changed, 21 insertions, 123 deletions
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index ebff9f4f56ec..ebc041ff9cd5 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -31,22 +31,6 @@
#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",
@@ -61,7 +45,7 @@ static const struct hc_driver ci_ehci_hc_driver = {
/*
* basic lifecycle operations
*/
- .reset = ci_ehci_setup,
+ .reset = ehci_setup,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 411bb74152eb..d23321ec0e46 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -53,18 +53,11 @@ static void atmel_stop_ehci(struct platform_device *pdev)
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 = {
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 0d2f35ca93f1..fd9b5424b860 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -349,7 +349,6 @@ static int ehci_fsl_reinit(struct ehci_hcd *ehci)
{
if (ehci_fsl_usb_setup(ehci))
return -EINVAL;
- ehci_port_power(ehci, 0);
return 0;
}
diff --git a/drivers/usb/host/ehci-grlib.c b/drivers/usb/host/ehci-grlib.c
index 3180cb3624d9..da4269550fba 100644
--- a/drivers/usb/host/ehci-grlib.c
+++ b/drivers/usb/host/ehci-grlib.c
@@ -34,22 +34,6 @@
#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",
@@ -64,7 +48,7 @@ static const struct hc_driver ehci_grlib_hc_driver = {
/*
* basic lifecycle operations
*/
- .reset = ehci_grlib_setup,
+ .reset = ehci_setup,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 68dd1c99b1f5..ab4a769a4104 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -371,24 +371,6 @@ static void ehci_shutdown(struct usb_hcd *hcd)
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);
-}
-
/*-------------------------------------------------------------------------*/
/*
@@ -1184,9 +1166,6 @@ static int __maybe_unused ehci_resume(struct usb_hcd *hcd, bool hibernated)
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;
}
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index a2c56cdd2c3a..a59c61fea09f 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -56,6 +56,19 @@ static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
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);
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index 4af4dc5b618c..7fa1ba4de789 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -53,7 +53,6 @@ static int ehci_msm_reset(struct usb_hcd *hcd)
/* Disable streaming mode and select host mode */
writel(0x13, USB_USBMODE);
- ehci_port_power(ehci, 1);
return 0;
}
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index 4a08fc0b27c9..a37224a4a49b 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -40,16 +40,10 @@ struct ehci_mxc_priv {
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 = {
diff --git a/drivers/usb/host/ehci-octeon.c b/drivers/usb/host/ehci-octeon.c
index ba26957abf46..a89750fff4ff 100644
--- a/drivers/usb/host/ehci-octeon.c
+++ b/drivers/usb/host/ehci-octeon.c
@@ -159,9 +159,6 @@ static int ehci_octeon_drv_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, hcd);
- /* root ports should always stay powered */
- ehci_port_power(ehci, 1);
-
return 0;
err3:
ehci_octeon_stop();
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index d7fe287d0678..44e7d0f638e8 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -146,9 +146,6 @@ static int omap_ehci_init(struct usb_hcd *hcd)
gpio_set_value_cansleep(pdata->reset_gpio_port[1], 1);
}
- /* root ports should always stay powered */
- ehci_port_power(ehci, 1);
-
return rc;
}
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 9c2717d66730..96da679becef 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -101,20 +101,6 @@ static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
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",
@@ -129,7 +115,7 @@ static const struct hc_driver ehci_orion_hc_driver = {
/*
* basic lifecycle operations
*/
- .reset = ehci_orion_setup,
+ .reset = ehci_setup,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index e17330ae0aee..c92dcaee0d4d 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -297,7 +297,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
#endif
- ehci_port_power(ehci, 1);
retval = ehci_pci_reinit(ehci, pdev);
done:
return retval;
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 272728c48c9e..6e6c23bdb484 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -40,11 +40,6 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
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;
}
diff --git a/drivers/usb/host/ehci-pmcmsp.c b/drivers/usb/host/ehci-pmcmsp.c
index 087aee2a904f..363890ee41d2 100644
--- a/drivers/usb/host/ehci-pmcmsp.c
+++ b/drivers/usb/host/ehci-pmcmsp.c
@@ -90,7 +90,6 @@ static int ehci_msp_setup(struct usb_hcd *hcd)
return retval;
usb_hcd_tdi_set_mode(ehci);
- ehci_port_power(ehci, 0);
return retval;
}
diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
index 6081e1ed3ac9..0c90a24fa989 100644
--- a/drivers/usb/host/ehci-sh.c
+++ b/drivers/usb/host/ehci-sh.c
@@ -21,17 +21,10 @@ struct ehci_sh_priv {
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 = {
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index c718a065e154..719ca48a471a 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -37,18 +37,11 @@ static void spear_stop_ehci(struct spear_ehci *ehci)
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 = {
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 2de089001ae9..94ee3212094e 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -280,7 +280,6 @@ static void tegra_ehci_shutdown(struct usb_hcd *hcd)
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;
@@ -288,12 +287,7 @@ static int tegra_ehci_setup(struct usb_hcd *hcd)
/* 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 {