#define USBPORT1EN 0x01
#define USBPORT2EN 0x02
-#define UHCI_PTR_BITS cpu_to_le32(0x000F)
-#define UHCI_PTR_TERM cpu_to_le32(0x0001)
-#define UHCI_PTR_QH cpu_to_le32(0x0002)
-#define UHCI_PTR_DEPTH cpu_to_le32(0x0004)
-#define UHCI_PTR_BREADTH cpu_to_le32(0x0000)
+#define UHCI_PTR_BITS(uhci) cpu_to_hc32((uhci), 0x000F)
+#define UHCI_PTR_TERM(uhci) cpu_to_hc32((uhci), 0x0001)
+#define UHCI_PTR_QH(uhci) cpu_to_hc32((uhci), 0x0002)
+#define UHCI_PTR_DEPTH(uhci) cpu_to_hc32((uhci), 0x0004)
+#define UHCI_PTR_BREADTH(uhci) cpu_to_hc32((uhci), 0x0000)
#define UHCI_NUMFRAMES 1024 /* in the frame list [array] */
#define UHCI_MAX_SOF_NUMBER 2047 /* in an SOF packet */
#define QH_WAIT_TIMEOUT msecs_to_jiffies(200)
+/*
+ * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
+ * __leXX (normally) or __beXX (given UHCI_BIG_ENDIAN_DESC), depending on
+ * the host controller implementation.
+ *
+ * To facilitate the strongest possible byte-order checking from "sparse"
+ * and so on, we use __leXX unless that's not practical.
+ */
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_DESC
+typedef __u32 __bitwise __hc32;
+typedef __u16 __bitwise __hc16;
+#else
+#define __hc32 __le32
+#define __hc16 __le16
+#endif
+
/*
* Queue Headers
*/
struct uhci_qh {
/* Hardware fields */
- __le32 link; /* Next QH in the schedule */
- __le32 element; /* Queue element (TD) pointer */
+ __hc32 link; /* Next QH in the schedule */
+ __hc32 element; /* Queue element (TD) pointer */
/* Software fields */
dma_addr_t dma_handle;
* We need a special accessor for the element pointer because it is
* subject to asynchronous updates by the controller.
*/
-static inline __le32 qh_element(struct uhci_qh *qh) {
- __le32 element = qh->element;
-
- barrier();
- return element;
-}
+#define qh_element(qh) ACCESS_ONCE((qh)->element)
-#define LINK_TO_QH(qh) (UHCI_PTR_QH | cpu_to_le32((qh)->dma_handle))
+#define LINK_TO_QH(uhci, qh) (UHCI_PTR_QH((uhci)) | \
+ cpu_to_hc32((uhci), (qh)->dma_handle))
/*
/*
* for TD <info>: (a.k.a. Token)
*/
-#define td_token(td) le32_to_cpu((td)->token)
+#define td_token(uhci, td) hc32_to_cpu((uhci), (td)->token)
#define TD_TOKEN_DEVADDR_SHIFT 8
#define TD_TOKEN_TOGGLE_SHIFT 19
#define TD_TOKEN_TOGGLE (1 << 19)
*/
struct uhci_td {
/* Hardware fields */
- __le32 link;
- __le32 status;
- __le32 token;
- __le32 buffer;
+ __hc32 link;
+ __hc32 status;
+ __hc32 token;
+ __hc32 buffer;
/* Software fields */
dma_addr_t dma_handle;
* We need a special accessor for the control/status word because it is
* subject to asynchronous updates by the controller.
*/
-static inline u32 td_status(struct uhci_td *td) {
- __le32 status = td->status;
-
- barrier();
- return le32_to_cpu(status);
-}
+#define td_status(uhci, td) hc32_to_cpu((uhci), \
+ ACCESS_ONCE((td)->status))
-#define LINK_TO_TD(td) (cpu_to_le32((td)->dma_handle))
+#define LINK_TO_TD(uhci, td) (cpu_to_hc32((uhci), (td)->dma_handle))
/*
spinlock_t lock;
dma_addr_t frame_dma_handle; /* Hardware frame list */
- __le32 *frame;
+ __hc32 *frame;
void **frame_cpu; /* CPU's frame list */
enum uhci_rh_state rh_state;
/* Silicon quirks */
unsigned int oc_low:1; /* OverCurrent bit active low */
unsigned int wait_for_hp:1; /* Wait for HP port reset */
+ unsigned int big_endian_mmio:1; /* Big endian registers */
+ unsigned int big_endian_desc:1; /* Big endian descriptors */
/* Support for port suspend/resume/reset */
unsigned long port_c_suspend; /* Bit-arrays of ports */
* we use memory mapped registers.
*/
-#if !defined(CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC)
+#ifndef CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC
/* Support PCI only */
-static inline u32 uhci_readl(struct uhci_hcd *uhci, int reg)
+static inline u32 uhci_readl(const struct uhci_hcd *uhci, int reg)
{
return inl(uhci->io_addr + reg);
}
-static inline void uhci_writel(struct uhci_hcd *uhci, u32 val, int reg)
+static inline void uhci_writel(const struct uhci_hcd *uhci, u32 val, int reg)
{
outl(val, uhci->io_addr + reg);
}
-static inline u16 uhci_readw(struct uhci_hcd *uhci, int reg)
+static inline u16 uhci_readw(const struct uhci_hcd *uhci, int reg)
{
return inw(uhci->io_addr + reg);
}
-static inline void uhci_writew(struct uhci_hcd *uhci, u16 val, int reg)
+static inline void uhci_writew(const struct uhci_hcd *uhci, u16 val, int reg)
{
outw(val, uhci->io_addr + reg);
}
-static inline u8 uhci_readb(struct uhci_hcd *uhci, int reg)
+static inline u8 uhci_readb(const struct uhci_hcd *uhci, int reg)
{
return inb(uhci->io_addr + reg);
}
-static inline void uhci_writeb(struct uhci_hcd *uhci, u8 val, int reg)
+static inline void uhci_writeb(const struct uhci_hcd *uhci, u8 val, int reg)
{
outb(val, uhci->io_addr + reg);
}
#else
+/* Support non-PCI host controllers */
+#ifdef CONFIG_PCI
/* Support PCI and non-PCI host controllers */
-
#define uhci_has_pci_registers(u) ((u)->io_addr != 0)
+#else
+/* Support non-PCI host controllers only */
+#define uhci_has_pci_registers(u) 0
+#endif
+
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+/* Support (non-PCI) big endian host controllers */
+#define uhci_big_endian_mmio(u) ((u)->big_endian_mmio)
+#else
+#define uhci_big_endian_mmio(u) 0
+#endif
-static inline u32 uhci_readl(struct uhci_hcd *uhci, int reg)
+static inline u32 uhci_readl(const struct uhci_hcd *uhci, int reg)
{
if (uhci_has_pci_registers(uhci))
return inl(uhci->io_addr + reg);
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+ else if (uhci_big_endian_mmio(uhci))
+ return readl_be(uhci->regs + reg);
+#endif
else
return readl(uhci->regs + reg);
}
-static inline void uhci_writel(struct uhci_hcd *uhci, u32 val, int reg)
+static inline void uhci_writel(const struct uhci_hcd *uhci, u32 val, int reg)
{
if (uhci_has_pci_registers(uhci))
outl(val, uhci->io_addr + reg);
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+ else if (uhci_big_endian_mmio(uhci))
+ writel_be(val, uhci->regs + reg);
+#endif
else
writel(val, uhci->regs + reg);
}
-static inline u16 uhci_readw(struct uhci_hcd *uhci, int reg)
+static inline u16 uhci_readw(const struct uhci_hcd *uhci, int reg)
{
if (uhci_has_pci_registers(uhci))
return inw(uhci->io_addr + reg);
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+ else if (uhci_big_endian_mmio(uhci))
+ return readw_be(uhci->regs + reg);
+#endif
else
return readw(uhci->regs + reg);
}
-static inline void uhci_writew(struct uhci_hcd *uhci, u16 val, int reg)
+static inline void uhci_writew(const struct uhci_hcd *uhci, u16 val, int reg)
{
if (uhci_has_pci_registers(uhci))
outw(val, uhci->io_addr + reg);
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+ else if (uhci_big_endian_mmio(uhci))
+ writew_be(val, uhci->regs + reg);
+#endif
else
writew(val, uhci->regs + reg);
}
-static inline u8 uhci_readb(struct uhci_hcd *uhci, int reg)
+static inline u8 uhci_readb(const struct uhci_hcd *uhci, int reg)
{
if (uhci_has_pci_registers(uhci))
return inb(uhci->io_addr + reg);
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+ else if (uhci_big_endian_mmio(uhci))
+ return readb_be(uhci->regs + reg);
+#endif
else
return readb(uhci->regs + reg);
}
-static inline void uhci_writeb(struct uhci_hcd *uhci, u8 val, int reg)
+static inline void uhci_writeb(const struct uhci_hcd *uhci, u8 val, int reg)
{
if (uhci_has_pci_registers(uhci))
outb(val, uhci->io_addr + reg);
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_MMIO
+ else if (uhci_big_endian_mmio(uhci))
+ writeb_be(val, uhci->regs + reg);
+#endif
else
writeb(val, uhci->regs + reg);
}
-#endif /* !defined(CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC) */
+#endif /* CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC */
+
+/*
+ * The GRLIB GRUSBHC controller can use big endian format for its descriptors.
+ *
+ * UHCI controllers accessed through PCI work normally (little-endian
+ * everywhere), so we don't bother supporting a BE-only mode.
+ */
+#ifdef CONFIG_USB_UHCI_BIG_ENDIAN_DESC
+#define uhci_big_endian_desc(u) ((u)->big_endian_desc)
+
+/* cpu to uhci */
+static inline __hc32 cpu_to_hc32(const struct uhci_hcd *uhci, const u32 x)
+{
+ return uhci_big_endian_desc(uhci)
+ ? (__force __hc32)cpu_to_be32(x)
+ : (__force __hc32)cpu_to_le32(x);
+}
+
+/* uhci to cpu */
+static inline u32 hc32_to_cpu(const struct uhci_hcd *uhci, const __hc32 x)
+{
+ return uhci_big_endian_desc(uhci)
+ ? be32_to_cpu((__force __be32)x)
+ : le32_to_cpu((__force __le32)x);
+}
+
+#else
+/* cpu to uhci */
+static inline __hc32 cpu_to_hc32(const struct uhci_hcd *uhci, const u32 x)
+{
+ return cpu_to_le32(x);
+}
+
+/* uhci to cpu */
+static inline u32 hc32_to_cpu(const struct uhci_hcd *uhci, const __hc32 x)
+{
+ return le32_to_cpu(x);
+}
+#endif
#endif
projects / ~andy / linux / blobdiff