[U-Boot] [PATCH 1/2] drivers: USB: OHCI: allow compilation for 64-bit targets

[Andre Przywara]

OHCI has a known limitation of allowing only 32-bit DMA buffer
addresses, so we have a lot of u32 variables around, which are assigned
to pointers and vice versa. This obviously creates issues with 64-bit
systems, so the compiler complains here and there.
To allow compilation for 64-bit boards which use only memory below 4GB
anyway (and to avoid more invasive fixes), adjust some casts and types
and assume that the EDs and TDs are all located in the lower 4GB.
This fixes compilation of the OHCI driver for the Pine64.

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
 drivers/usb/host/ohci-hcd.c   | 21 +++++++++++----------
 drivers/usb/host/ohci-sunxi.c |  2 +-
 drivers/usb/host/ohci.h       | 11 +++++++----
 3 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index ccbfc02..0f6d03e 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -682,7 +682,7 @@ static int ep_link(ohci_t *ohci, ed_t *edi)
 		ed->hwNextED = 0;
 		flush_dcache_ed(ed);
 		if (ohci->ed_controltail == NULL)
-			ohci_writel(ed, &ohci->regs->ed_controlhead);
+			ohci_writel((uintptr_t)ed, &ohci->regs->ed_controlhead);
 		else
 			ohci->ed_controltail->hwNextED =
 						   m32_swap((unsigned long)ed);
@@ -700,7 +700,7 @@ static int ep_link(ohci_t *ohci, ed_t *edi)
 		ed->hwNextED = 0;
 		flush_dcache_ed(ed);
 		if (ohci->ed_bulktail == NULL)
-			ohci_writel(ed, &ohci->regs->ed_bulkhead);
+			ohci_writel((uintptr_t)ed, &ohci->regs->ed_bulkhead);
 		else
 			ohci->ed_bulktail->hwNextED =
 						   m32_swap((unsigned long)ed);
@@ -753,7 +753,7 @@ static void periodic_unlink(struct ohci *ohci, volatile struct ed *ed,
 
 		/* ED might have been unlinked through another path */
 		while (*ed_p != 0) {
-			if (((struct ed *)
+			if (((struct ed *)(uintptr_t)
 					m32_swap((unsigned long)ed_p)) == ed) {
 				*ed_p = ed->hwNextED;
 				aligned_ed_p = (unsigned long)ed_p;
@@ -762,7 +762,7 @@ static void periodic_unlink(struct ohci *ohci, volatile struct ed *ed,
 					aligned_ed_p + ARCH_DMA_MINALIGN);
 				break;
 			}
-			ed_p = &(((struct ed *)
+			ed_p = &(((struct ed *)(uintptr_t)
 				     m32_swap((unsigned long)ed_p))->hwNextED);
 		}
 	}
@@ -798,7 +798,7 @@ static int ep_unlink(ohci_t *ohci, ed_t *edi)
 		if (ohci->ed_controltail == ed) {
 			ohci->ed_controltail = ed->ed_prev;
 		} else {
-			((ed_t *)m32_swap(
+			((ed_t *)(uintptr_t)m32_swap(
 			    *((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 		}
 		break;
@@ -819,7 +819,7 @@ static int ep_unlink(ohci_t *ohci, ed_t *edi)
 		if (ohci->ed_bulktail == ed) {
 			ohci->ed_bulktail = ed->ed_prev;
 		} else {
-			((ed_t *)m32_swap(
+			((ed_t *)(uintptr_t)m32_swap(
 			     *((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 		}
 		break;
@@ -914,12 +914,13 @@ static void td_fill(ohci_t *ohci, unsigned int info,
 
 	/* fill the old dummy TD */
 	td = urb_priv->td [index] =
-			     (td_t *)(m32_swap(urb_priv->ed->hwTailP) & ~0xf);
+			     (td_t *)(uintptr_t)
+			     (m32_swap(urb_priv->ed->hwTailP) & ~0xf);
 
 	td->ed = urb_priv->ed;
 	td->next_dl_td = NULL;
 	td->index = index;
-	td->data = (__u32)data;
+	td->data = (uintptr_t)data;
 #ifdef OHCI_FILL_TRACE
 	if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 		for (i = 0; i < len; i++)
@@ -1099,7 +1100,7 @@ static void check_status(td_t *td_list)
  * we reverse the reversed done-list */
 static td_t *dl_reverse_done_list(ohci_t *ohci)
 {
-	__u32 td_list_hc;
+	uintptr_t td_list_hc;
 	td_t *td_rev = NULL;
 	td_t *td_list = NULL;
 
@@ -1862,7 +1863,7 @@ static int hc_start(ohci_t *ohci)
 	ohci_writel(0, &ohci->regs->ed_controlhead);
 	ohci_writel(0, &ohci->regs->ed_bulkhead);
 
-	ohci_writel((__u32)ohci->hcca,
+	ohci_writel((uintptr_t)ohci->hcca,
 		    &ohci->regs->hcca); /* reset clears this */
 
 	fminterval = 0x2edf;
diff --git a/drivers/usb/host/ohci-sunxi.c b/drivers/usb/host/ohci-sunxi.c
index 2a1e8bf..0689374 100644
--- a/drivers/usb/host/ohci-sunxi.c
+++ b/drivers/usb/host/ohci-sunxi.c
@@ -51,7 +51,7 @@ static int ohci_usb_probe(struct udevice *dev)
 	extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
 #endif
 	priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
-	priv->phy_index = ((u32)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST;
+	priv->phy_index = ((uintptr_t)regs - (SUNXI_USB1_BASE + 0x400)) / BASE_DIST;
 	priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
 	extra_ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
 	priv->usb_gate_mask <<= priv->phy_index;
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 9b0c4a2..db0924c 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -10,12 +10,15 @@
 /*
  * e.g. PCI controllers need this
  */
+
+#include <asm/io.h>
+
 #ifdef CONFIG_SYS_OHCI_SWAP_REG_ACCESS
-# define ohci_readl(a) __swap_32(*((volatile u32 *)(a)))
-# define ohci_writel(a, b) (*((volatile u32 *)(b)) = __swap_32((volatile u32)a))
+# define ohci_readl(a) __swap_32(readl(a))
+# define ohci_writel(v, a) writel(__swap_32(v), a)
 #else
-# define ohci_readl(a) (*((volatile u32 *)(a)))
-# define ohci_writel(a, b) (*((volatile u32 *)(b)) = ((volatile u32)a))
+# define ohci_readl(a) readl(a)
+# define ohci_writel(v, a) writel(v, a)
 #endif /* CONFIG_SYS_OHCI_SWAP_REG_ACCESS */
 
 #if ARCH_DMA_MINALIGN > 16
-- 
2.8.2