250 lines
6.7 KiB
Diff
250 lines
6.7 KiB
Diff
From 603684c9a5f62460cd63147d25dd13c7a7395e1d Mon Sep 17 00:00:00 2001
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From: Paolo Pisati <paolo.pisati@canonical.com>
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Date: Sun, 24 Jun 2012 16:31:18 +0000
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Subject: [PATCH 1/3] UBUNTU: SAUCE: Revert "Fix OMAP EHCI suspend/resume
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failure (i693)"
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This reverts commit 354ab8567ae3107a8cbe7228c3181990ba598aac.
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BugLink: http://bugs/launchpad.net/bugs/1017718
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Here is the thread where they discuss the issue:
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http://comments.gmane.org/gmane.linux.usb.general/66239
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"OMAP: USB : Fix the EHCI enumeration and core retention issue"
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Revert will come down in one of the following 3.5rcX, in the mean time
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we do it on our own.
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Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
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---
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drivers/usb/host/ehci-omap.c | 168 +-----------------------------------------
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1 file changed, 1 insertion(+), 167 deletions(-)
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diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
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index 17cfb8a..a44294d 100644
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--- a/drivers/usb/host/ehci-omap.c
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+++ b/drivers/usb/host/ehci-omap.c
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@@ -43,7 +43,6 @@
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#include <linux/regulator/consumer.h>
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#include <linux/pm_runtime.h>
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#include <linux/gpio.h>
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-#include <linux/clk.h>
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/* EHCI Register Set */
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#define EHCI_INSNREG04 (0xA0)
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@@ -56,15 +55,6 @@
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#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
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#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
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-/* Errata i693 */
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-static struct clk *utmi_p1_fck;
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-static struct clk *utmi_p2_fck;
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-static struct clk *xclk60mhsp1_ck;
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-static struct clk *xclk60mhsp2_ck;
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-static struct clk *usbhost_p1_fck;
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-static struct clk *usbhost_p2_fck;
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-static struct clk *init_60m_fclk;
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-
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ehci_omap_hc_driver;
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@@ -80,41 +70,6 @@ static inline u32 ehci_read(void __iomem *base, u32 reg)
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return __raw_readl(base + reg);
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}
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-/* Erratum i693 workaround sequence */
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-static void omap_ehci_erratum_i693(struct ehci_hcd *ehci)
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-{
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- int ret = 0;
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-
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- /* Switch to the internal 60 MHz clock */
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- ret = clk_set_parent(utmi_p1_fck, init_60m_fclk);
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- if (ret != 0)
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- ehci_err(ehci, "init_60m_fclk set parent"
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- "failed error:%d\n", ret);
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-
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- ret = clk_set_parent(utmi_p2_fck, init_60m_fclk);
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- if (ret != 0)
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- ehci_err(ehci, "init_60m_fclk set parent"
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- "failed error:%d\n", ret);
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-
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- clk_enable(usbhost_p1_fck);
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- clk_enable(usbhost_p2_fck);
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-
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- /* Wait 1ms and switch back to the external clock */
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- mdelay(1);
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- ret = clk_set_parent(utmi_p1_fck, xclk60mhsp1_ck);
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- if (ret != 0)
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- ehci_err(ehci, "xclk60mhsp1_ck set parent"
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- "failed error:%d\n", ret);
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-
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- ret = clk_set_parent(utmi_p2_fck, xclk60mhsp2_ck);
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- if (ret != 0)
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- ehci_err(ehci, "xclk60mhsp2_ck set parent"
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- "failed error:%d\n", ret);
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-
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- clk_disable(usbhost_p1_fck);
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- clk_disable(usbhost_p2_fck);
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-}
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-
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static void omap_ehci_soft_phy_reset(struct platform_device *pdev, u8 port)
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{
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struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev);
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@@ -145,50 +100,6 @@ static void omap_ehci_soft_phy_reset(struct platform_device *pdev, u8 port)
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}
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}
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-static int omap_ehci_hub_control(
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- struct usb_hcd *hcd,
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- u16 typeReq,
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- u16 wValue,
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- u16 wIndex,
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- char *buf,
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- u16 wLength
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-)
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-{
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- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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- u32 __iomem *status_reg = &ehci->regs->port_status[
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- (wIndex & 0xff) - 1];
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- u32 temp;
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- unsigned long flags;
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- int retval = 0;
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-
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- spin_lock_irqsave(&ehci->lock, flags);
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-
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- if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
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- temp = ehci_readl(ehci, status_reg);
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- if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
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- retval = -EPIPE;
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- goto done;
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- }
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-
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- temp &= ~PORT_WKCONN_E;
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- temp |= PORT_WKDISC_E | PORT_WKOC_E;
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- ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
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-
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- omap_ehci_erratum_i693(ehci);
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-
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- set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
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- goto done;
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- }
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-
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- spin_unlock_irqrestore(&ehci->lock, flags);
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-
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- /* Handle the hub control events here */
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- return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
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-done:
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- spin_unlock_irqrestore(&ehci->lock, flags);
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- return retval;
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-}
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-
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static void disable_put_regulator(
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struct ehci_hcd_omap_platform_data *pdata)
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{
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@@ -353,76 +264,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
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/* root ports should always stay powered */
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ehci_port_power(omap_ehci, 1);
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- /* get clocks */
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- utmi_p1_fck = clk_get(dev, "utmi_p1_gfclk");
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- if (IS_ERR(utmi_p1_fck)) {
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- ret = PTR_ERR(utmi_p1_fck);
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- dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
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- goto err_add_hcd;
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- }
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-
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- xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck");
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- if (IS_ERR(xclk60mhsp1_ck)) {
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- ret = PTR_ERR(xclk60mhsp1_ck);
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- dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
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- goto err_utmi_p1_fck;
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- }
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-
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- utmi_p2_fck = clk_get(dev, "utmi_p2_gfclk");
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- if (IS_ERR(utmi_p2_fck)) {
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- ret = PTR_ERR(utmi_p2_fck);
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- dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
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- goto err_xclk60mhsp1_ck;
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- }
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-
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- xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck");
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- if (IS_ERR(xclk60mhsp2_ck)) {
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- ret = PTR_ERR(xclk60mhsp2_ck);
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- dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
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- goto err_utmi_p2_fck;
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- }
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-
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- usbhost_p1_fck = clk_get(dev, "usb_host_hs_utmi_p1_clk");
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- if (IS_ERR(usbhost_p1_fck)) {
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- ret = PTR_ERR(usbhost_p1_fck);
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- dev_err(dev, "usbhost_p1_fck failed error:%d\n", ret);
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- goto err_xclk60mhsp2_ck;
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- }
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-
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- usbhost_p2_fck = clk_get(dev, "usb_host_hs_utmi_p2_clk");
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- if (IS_ERR(usbhost_p2_fck)) {
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- ret = PTR_ERR(usbhost_p2_fck);
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- dev_err(dev, "usbhost_p2_fck failed error:%d\n", ret);
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- goto err_usbhost_p1_fck;
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- }
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-
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- init_60m_fclk = clk_get(dev, "init_60m_fclk");
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- if (IS_ERR(init_60m_fclk)) {
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- ret = PTR_ERR(init_60m_fclk);
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- dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
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- goto err_usbhost_p2_fck;
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- }
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-
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return 0;
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-err_usbhost_p2_fck:
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- clk_put(usbhost_p2_fck);
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-
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-err_usbhost_p1_fck:
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- clk_put(usbhost_p1_fck);
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-
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-err_xclk60mhsp2_ck:
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- clk_put(xclk60mhsp2_ck);
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-
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-err_utmi_p2_fck:
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- clk_put(utmi_p2_fck);
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-
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-err_xclk60mhsp1_ck:
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- clk_put(xclk60mhsp1_ck);
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-
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-err_utmi_p1_fck:
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- clk_put(utmi_p1_fck);
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-
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err_add_hcd:
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disable_put_regulator(pdata);
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pm_runtime_put_sync(dev);
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@@ -451,15 +294,6 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev)
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disable_put_regulator(dev->platform_data);
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iounmap(hcd->regs);
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usb_put_hcd(hcd);
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-
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- clk_put(utmi_p1_fck);
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- clk_put(utmi_p2_fck);
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- clk_put(xclk60mhsp1_ck);
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- clk_put(xclk60mhsp2_ck);
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- clk_put(usbhost_p1_fck);
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- clk_put(usbhost_p2_fck);
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- clk_put(init_60m_fclk);
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-
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pm_runtime_put_sync(dev);
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pm_runtime_disable(dev);
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@@ -530,7 +364,7 @@ static const struct hc_driver ehci_omap_hc_driver = {
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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- .hub_control = omap_ehci_hub_control,
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+ .hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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--
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1.7.9.5
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