USB: EHCI: Support controllers with big endian capability regs

The two first HC capability registers (CAPLENGTH and HCIVERSION)
are defined as one 8-bit and one 16-bit register. Most HC
implementations have selected to treat these registers as part
of a 32-bit register, giving the same layout for both big and
small endian systems.

This patch adds a new quirk, big_endian_capbase, to support
controllers with big endian register interfaces that treat
HCIVERSION and CAPLENGTH as individual registers.

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>

26 files changed, 41 insertions, 28 deletions

diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index a6a350f5827b..1fc8f1249806 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -102,6 +102,9 @@ static struct kgdb_io kgdbdbgp_io_ops;
 #define dbgp_kgdb_mode (0)
 #endif
 
+/* Local version of HC_LENGTH macro as ehci struct is not available here */
+#define EARLY_HC_LENGTH(p)      (0x00ff & (p)) /* bits 7 : 0 */
+
 /*
  * USB Packet IDs (PIDs)
  */
@@ -892,7 +895,7 @@ int __init early_dbgp_init(char *s)
         dbgp_printk("ehci_bar: %p\n", ehci_bar);
 
         ehci_caps  = ehci_bar;
-        ehci_regs  = ehci_bar + HC_LENGTH(readl(&ehci_caps->hc_capbase));
+        ehci_regs  = ehci_bar + EARLY_HC_LENGTH(readl(&ehci_caps->hc_capbase));
         ehci_debug = ehci_bar + offset;
         ehci_dev.bus = bus;
         ehci_dev.slot = slot;
diff --git a/drivers/usb/host/ehci-ath79.c b/drivers/usb/host/ehci-ath79.c
index 7ea23b50f5d8..98cc8a13169c 100644
--- a/drivers/usb/host/ehci-ath79.c
+++ b/drivers/usb/host/ehci-ath79.c
@@ -44,6 +44,7 @@ static int ehci_ath79_init(struct usb_hcd *hcd)
         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
         struct platform_device *pdev = to_platform_device(hcd->self.controller);
         const struct platform_device_id *id;
+        int hclength;
         int ret;
 
         id = platform_get_device_id(pdev);
@@ -52,21 +53,20 @@ static int ehci_ath79_init(struct usb_hcd *hcd)
                 return -EINVAL;
         }
 
+        hclength = HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         switch (id->driver_data) {
         case EHCI_ATH79_IP_V1:
                 ehci->has_synopsys_hc_bug = 1;
 
                 ehci->caps = hcd->regs;
-                ehci->regs = hcd->regs +
-                        HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                ehci->regs = hcd->regs + hclength;
                 break;
 
         case EHCI_ATH79_IP_V2:
                 hcd->has_tt = 1;
 
                 ehci->caps = hcd->regs + 0x100;
-                ehci->regs = hcd->regs + 0x100 +
-                        HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                ehci->regs = hcd->regs + 0x100 + hclength;
                 break;
 
         default:
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index b2ed55cb811d..a5a3ef1f0096 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -56,7 +56,7 @@ static int ehci_atmel_setup(struct usb_hcd *hcd)
         /* registers start at offset 0x0 */
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs +
-                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
 
diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c
index a869e3c103d3..40b002869ac2 100644
--- a/drivers/usb/host/ehci-au1xxx.c
+++ b/drivers/usb/host/ehci-au1xxx.c
@@ -175,7 +175,8 @@ static int ehci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
 
         ehci = hcd_to_ehci(hcd);
         ehci->caps = hcd->regs;
-        ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
+        ehci->regs = hcd->regs +
+                HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = readl(&ehci->caps->hcs_params);
 
diff --git a/drivers/usb/host/ehci-cns3xxx.c b/drivers/usb/host/ehci-cns3xxx.c
index 708a05b5d258..d41745c6f0c4 100644
--- a/drivers/usb/host/ehci-cns3xxx.c
+++ b/drivers/usb/host/ehci-cns3xxx.c
@@ -34,7 +34,7 @@ static int cns3xxx_ehci_init(struct usb_hcd *hcd)
 
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs
-                + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 
         hcd->has_tt = 0;
diff --git a/drivers/usb/host/ehci-dbg.c b/drivers/usb/host/ehci-dbg.c
index 693c29b30521..40a844c1dbb4 100644
--- a/drivers/usb/host/ehci-dbg.c
+++ b/drivers/usb/host/ehci-dbg.c
@@ -726,7 +726,7 @@ static ssize_t fill_registers_buffer(struct debug_buffer *buf)
         }
 
         /* Capability Registers */
-        i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
+        i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         temp = scnprintf (next, size,
                 "bus %s, device %s\n"
                 "%s\n"
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 623732a312dd..f380bf97e5af 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -324,7 +324,7 @@ static int ehci_fsl_setup(struct usb_hcd *hcd)
         /* EHCI registers start at offset 0x100 */
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
-            HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
 
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 83b7d5f02a15..8164ffafd10a 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -739,7 +739,7 @@ static int ehci_run (struct usb_hcd *hcd)
         up_write(&ehci_cf_port_reset_rwsem);
         ehci->last_periodic_enable = ktime_get_real();
 
-        temp = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
+        temp = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         ehci_info (ehci,
                 "USB %x.%x started, EHCI %x.%02x%s\n",
                 ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
diff --git a/drivers/usb/host/ehci-ixp4xx.c b/drivers/usb/host/ehci-ixp4xx.c
index 89b7c70c6ed6..50e600d26e28 100644
--- a/drivers/usb/host/ehci-ixp4xx.c
+++ b/drivers/usb/host/ehci-ixp4xx.c
@@ -23,7 +23,7 @@ static int ixp4xx_ehci_init(struct usb_hcd *hcd)
 
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100
-                + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 
         hcd->has_tt = 1;
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index 9ce1b0bc186d..b5a0bf649c95 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -41,7 +41,7 @@ static int ehci_msm_reset(struct usb_hcd *hcd)
 
         ehci->caps = USB_CAPLENGTH;
         ehci->regs = USB_CAPLENGTH +
-                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
 
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index 25c8c10bb689..0c058be35a38 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -208,7 +208,7 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
         /* EHCI registers start at offset 0x100 */
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
-            HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 
         /* set up the PORTSCx register */
         ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]);
diff --git a/drivers/usb/host/ehci-octeon.c b/drivers/usb/host/ehci-octeon.c
index a31a031178a8..ff55757ba7d8 100644
--- a/drivers/usb/host/ehci-octeon.c
+++ b/drivers/usb/host/ehci-octeon.c
@@ -151,7 +151,7 @@ static int ehci_octeon_drv_probe(struct platform_device *pdev)
 
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs +
-                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 7e41a95c5ceb..3c482dc99ece 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -188,7 +188,7 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
         /* we know this is the memory we want, no need to ioremap again */
         omap_ehci->caps = hcd->regs;
         omap_ehci->regs = hcd->regs
-                        + HC_LENGTH(readl(&omap_ehci->caps->hc_capbase));
+                + HC_LENGTH(ehci, readl(&omap_ehci->caps->hc_capbase));
 
         dbg_hcs_params(omap_ehci, "reset");
         dbg_hcc_params(omap_ehci, "reset");
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 281e094e1c18..395bdb0248d5 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -251,7 +251,7 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
         ehci = hcd_to_ehci(hcd);
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
-                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
         hcd->has_tt = 1;
         ehci->sbrn = 0x20;
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index d5eaea7caf89..660b80a75cac 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -70,7 +70,7 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
 
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs +
-                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
diff --git a/drivers/usb/host/ehci-pmcmsp.c b/drivers/usb/host/ehci-pmcmsp.c
index a2168642175b..cd69099cda19 100644
--- a/drivers/usb/host/ehci-pmcmsp.c
+++ b/drivers/usb/host/ehci-pmcmsp.c
@@ -83,7 +83,7 @@ static int ehci_msp_setup(struct usb_hcd *hcd)
 
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs +
-                        HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
 
diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
index 1f09f253697e..8552db6c29c9 100644
--- a/drivers/usb/host/ehci-ppc-of.c
+++ b/drivers/usb/host/ehci-ppc-of.c
@@ -179,7 +179,7 @@ static int __devinit ehci_hcd_ppc_of_probe(struct platform_device *op)
 
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs +
-                        HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
diff --git a/drivers/usb/host/ehci-ps3.c b/drivers/usb/host/ehci-ps3.c
index 1dee33b9139e..64626a777d61 100644
--- a/drivers/usb/host/ehci-ps3.c
+++ b/drivers/usb/host/ehci-ps3.c
@@ -29,7 +29,7 @@ static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
         ehci->big_endian_mmio = 1;
 
         ehci->caps = hcd->regs;
-        ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
+        ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
                 &ehci->caps->hc_capbase));
 
         dbg_hcs_params(ehci, "reset");
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 0c18f280bf4c..321a03301ad2 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -126,7 +126,8 @@ static int s5p_ehci_probe(struct platform_device *pdev)
 
         ehci = hcd_to_ehci(hcd);
         ehci->caps = hcd->regs;
-        ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
+        ehci->regs = hcd->regs +
+                HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
 
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
index 595f70f42b52..86a95bb80a61 100644
--- a/drivers/usb/host/ehci-sh.c
+++ b/drivers/usb/host/ehci-sh.c
@@ -23,7 +23,7 @@ static int ehci_sh_reset(struct usb_hcd *hcd)
         int ret;
 
         ehci->caps = hcd->regs;
-        ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
+        ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
                 &ehci->caps->hc_capbase));
 
         dbg_hcs_params(ehci, "reset");
diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index 75c00873443d..dbf1e4ef3c17 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -38,7 +38,7 @@ static int ehci_spear_setup(struct usb_hcd *hcd)
 
         /* registers start at offset 0x0 */
         ehci->caps = hcd->regs;
-        ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
+        ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
                                 &ehci->caps->hc_capbase));
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 7359bcbe4176..02b2bfd49a10 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -400,7 +400,7 @@ static int tegra_ehci_setup(struct usb_hcd *hcd)
         /* EHCI registers start at offset 0x100 */
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
-                HC_LENGTH(readl(&ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
 
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
diff --git a/drivers/usb/host/ehci-vt8500.c b/drivers/usb/host/ehci-vt8500.c
index 20168062035a..47d749631bc7 100644
--- a/drivers/usb/host/ehci-vt8500.c
+++ b/drivers/usb/host/ehci-vt8500.c
@@ -121,7 +121,8 @@ static int vt8500_ehci_drv_probe(struct platform_device *pdev)
 
         ehci = hcd_to_ehci(hcd);
         ehci->caps = hcd->regs;
-        ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
+        ehci->regs = hcd->regs +
+                HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
 
         dbg_hcs_params(ehci, "reset");
         dbg_hcc_params(ehci, "reset");
diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
index 6bc35809a5c6..52a027aaa370 100644
--- a/drivers/usb/host/ehci-w90x900.c
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -57,7 +57,7 @@ static int __devinit usb_w90x900_probe(const struct hc_driver *driver,
         ehci = hcd_to_ehci(hcd);
         ehci->caps = hcd->regs;
         ehci->regs = hcd->regs +
-                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 
         /* enable PHY 0,1,the regs only apply to w90p910
         *  0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c
index effc58d7af8b..a64d6d66d760 100644
--- a/drivers/usb/host/ehci-xilinx-of.c
+++ b/drivers/usb/host/ehci-xilinx-of.c
@@ -220,7 +220,7 @@ static int __devinit ehci_hcd_xilinx_of_probe(struct platform_device *op)
          */
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
-                        HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index e9ba8e252489..d0792f591590 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -128,6 +128,7 @@ struct ehci_hcd {			/* one per controller */
         unsigned                has_fsl_port_bug:1; /* FreeScale */
         unsigned                big_endian_mmio:1;
         unsigned                big_endian_desc:1;
+        unsigned                big_endian_capbase:1;
         unsigned                has_amcc_usb23:1;
         unsigned                need_io_watchdog:1;
         unsigned                broken_periodic:1;
@@ -605,12 +606,18 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
  * This attempts to support either format at compile time without a
  * runtime penalty, or both formats with the additional overhead
  * of checking a flag bit.
+ *
+ * ehci_big_endian_capbase is a special quirk for controllers that
+ * implement the HC capability registers as separate registers and not
+ * as fields of a 32-bit register.
  */
 
 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
 #define ehci_big_endian_mmio(e)         ((e)->big_endian_mmio)
+#define ehci_big_endian_capbase(e)      ((e)->big_endian_capbase)
 #else
 #define ehci_big_endian_mmio(e)         0
+#define ehci_big_endian_capbase(e)      0
 #endif
 
 /*