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authorMarkus Klotzbuecher <mk@denx.de>2007-06-06 11:49:35 +0200
committerMarkus Klotzbuecher <mk@pollux.denx.de>2007-06-06 11:49:35 +0200
commitfc43be478f2aa37ce38acd85355038866e4162af (patch)
treed80b73493a6b6c59439601715025f8e7a275b9fa
parent18135125f909948b85d1d6881ab4ac0efb4a1c58 (diff)
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USB/OHCI: endianness cleanup in the generic ohci driver
-rw-r--r--doc/README.generic_usb_ohci49
-rw-r--r--drivers/usb_ohci.c82
2 files changed, 62 insertions, 69 deletions
diff --git a/doc/README.generic_usb_ohci b/doc/README.generic_usb_ohci
index 017c69ab07..c343dfdf90 100644
--- a/doc/README.generic_usb_ohci
+++ b/doc/README.generic_usb_ohci
@@ -9,35 +9,52 @@ into cpu/board directories and are called via the hooks below.
Configuration options
----------------------
-CONFIG_USB_OHCI_NEW: enable the new OHCI driver
+ CONFIG_USB_OHCI_NEW: enable the new OHCI driver
-CFG_USB_OHCI_BOARD_INIT: call the board dependant hooks:
+ CFG_USB_OHCI_BOARD_INIT: call the board dependant hooks:
- - extern int usb_board_init(void);
- - extern int usb_board_stop(void);
- - extern int usb_cpu_init_fail(void);
+ - extern int usb_board_init(void);
+ - extern int usb_board_stop(void);
+ - extern int usb_cpu_init_fail(void);
-CFG_USB_OHCI_CPU_INIT: call the cpu dependant hooks:
+ CFG_USB_OHCI_CPU_INIT: call the cpu dependant hooks:
- - extern int usb_cpu_init(void);
- - extern int usb_cpu_stop(void);
- - extern int usb_cpu_init_fail(void);
+ - extern int usb_cpu_init(void);
+ - extern int usb_cpu_stop(void);
+ - extern int usb_cpu_init_fail(void);
-CFG_USB_OHCI_REGS_BASE: defines the base address of the OHCI registers
+ CFG_USB_OHCI_REGS_BASE: defines the base address of the OHCI
+ registers
-CFG_USB_OHCI_SLOT_NAME: slot name
+ CFG_USB_OHCI_SLOT_NAME: slot name
-CFG_USB_OHCI_MAX_ROOT_PORTS: maximal number of ports of the root hub.
+ CFG_USB_OHCI_MAX_ROOT_PORTS: maximal number of ports of the
+ root hub.
Endianness issues
------------------
-The LITTLEENDIAN #define determines if the 'swap_16' and 'swap_32'
-macros do byte swapping or not. But some cpus OHCI-controllers such as
-ppc4xx and mpc5xxx operate in little endian mode, so some extra ifdefs
-were necessary to make this work.
+The USB bus operates in little endian, but unfortunately there are
+OHCI controllers that operate in big endian such as ppc4xx and
+mpc5xxx. For these the config option
+ CFG_OHCI_BE_CONTROLLER
+
+needs to be defined.
+
+
+PCI Controllers
+----------------
+
+You'll need to define
+
+ CONFIG_PCI_OHCI
+
+PCI Controllers need to do byte swapping on register accesses, so they
+should to define:
+
+ CFG_OHCI_SWAP_REG_ACCESS
diff --git a/drivers/usb_ohci.c b/drivers/usb_ohci.c
index 459c809ca9..3cef576b2e 100644
--- a/drivers/usb_ohci.c
+++ b/drivers/usb_ohci.c
@@ -38,31 +38,20 @@
*/
/*
* IMPORTANT NOTES
- * 1 - you MUST define LITTLEENDIAN in the configuration file for the
- * board or this driver will NOT work!
+ * 1 - Read doc/README.generic_usb_ohci
* 2 - this driver is intended for use with USB Mass Storage Devices
* (BBB) and USB keyboard. There is NO support for Isochronous pipes!
- * 3 - when running on a PQFP208 AT91RM9200, define CONFIG_AT91C_PQFP_UHPBUG
+ * 2 - when running on a PQFP208 AT91RM9200, define CONFIG_AT91C_PQFP_UHPBUG
* to activate workaround for bug #41 or this driver will NOT work!
*/
#include <common.h>
-/* #include <pci.h> no PCI on the S3C24X0 */
#ifdef CONFIG_USB_OHCI_NEW
-/* mk: are these really required? */
-#if defined(CONFIG_S3C2400)
-# include <s3c2400.h>
-#elif defined(CONFIG_S3C2410)
-# include <s3c2410.h>
-#elif defined(CONFIG_ARM920T)
-# include <asm/arch/hardware.h>
-#elif defined(CONFIG_CPU_MONAHANS)
-# include <asm/arch/pxa-regs.h>
-#elif defined(CONFIG_MPC5200)
-# include <mpc5xxx.h>
-#elif defined(CONFIG_PCI_OHCI)
+#include <asm/byteorder.h>
+
+#if defined(CONFIG_PCI_OHCI)
# include <pci.h>
#endif
@@ -88,8 +77,16 @@
#define OHCI_CONTROL_INIT \
(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
-#define readl(a) m32_swap(*((vu_long *)(a)))
-#define writel(a, b) (*((vu_long *)(b)) = m32_swap((vu_long)a))
+/*
+ * e.g. PCI controllers need this
+ */
+#ifdef CFG_OHCI_SWAP_REG_ACCESS
+# define readl(a) __swap_16(*((vu_long *)(a)))
+# define writel(a, b) (*((vu_long *)(b)) = __swap_32((vu_long)a))
+#else
+# define readl(a) (*((vu_long *)(a)))
+# define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
+#endif /* CFG_OHCI_SWAP_REG_ACCESS */
#define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
@@ -114,13 +111,13 @@ static struct pci_device_id ohci_pci_ids[] = {
#define info(format, arg...) do {} while(0)
#endif
-#if defined(CONFIG_440EP) || defined(CONFIG_MPC5200)
-# define m16_swap(x) (x)
-# define m32_swap(x) (x)
+#ifdef CFG_OHCI_BE_CONTROLLER
+# define m16_swap(x) cpu_to_be16(x)
+# define m32_swap(x) cpu_to_be32(x)
#else
-# define m16_swap(x) swap_16(x)
-# define m32_swap(x) swap_32(x)
-#endif
+# define m16_swap(x) cpu_to_le16(x)
+# define m32_swap(x) cpu_to_le32(x)
+#endif /* CFG_OHCI_BE_CONTROLLER */
/* global ohci_t */
static ohci_t gohci;
@@ -1240,15 +1237,9 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe
}
bmRType_bReq = cmd->requesttype | (cmd->request << 8);
-#if defined(CONFIG_440EP) || defined(CONFIG_MPC5200)
- wValue = __swap_16(cmd->value);
- wIndex = __swap_16(cmd->index);
- wLength = __swap_16(cmd->length);
-#else
- wValue = m16_swap (cmd->value);
- wIndex = m16_swap (cmd->index);
- wLength = m16_swap (cmd->length);
-#endif /* CONFIG_440EP || CONFIG_MPC5200 */
+ wValue = cpu_to_le16 (cmd->value);
+ wIndex = cpu_to_le16 (cmd->index);
+ wLength = cpu_to_le16 (cmd->length);
info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
@@ -1262,33 +1253,18 @@ pkt_print(NULL, dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe
RH_OTHER | RH_CLASS almost ever means HUB_PORT here
*/
-#if defined(CONFIG_440EP) || defined(CONFIG_MPC5200)
- case RH_GET_STATUS:
- *(__u16 *) data_buf = __swap_16(1); OK (2);
- case RH_GET_STATUS | RH_INTERFACE:
- *(__u16 *) data_buf = __swap_16(0); OK (2);
- case RH_GET_STATUS | RH_ENDPOINT:
- *(__u16 *) data_buf = __swap_16(0); OK (2);
- case RH_GET_STATUS | RH_CLASS:
- *(__u32 *) data_buf = __swap_32(
- RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
- OK (4);
- case RH_GET_STATUS | RH_OTHER | RH_CLASS:
- *(__u32 *) data_buf = __swap_32(RD_RH_PORTSTAT); OK (4);
-#else
case RH_GET_STATUS:
- *(__u16 *) data_buf = m16_swap (1); OK (2);
+ *(__u16 *) data_buf = cpu_to_le16 (1); OK (2);
case RH_GET_STATUS | RH_INTERFACE:
- *(__u16 *) data_buf = m16_swap (0); OK (2);
+ *(__u16 *) data_buf = cpu_to_le16 (0); OK (2);
case RH_GET_STATUS | RH_ENDPOINT:
- *(__u16 *) data_buf = m16_swap (0); OK (2);
+ *(__u16 *) data_buf = cpu_to_le16 (0); OK (2);
case RH_GET_STATUS | RH_CLASS:
- *(__u32 *) data_buf = m32_swap (
+ *(__u32 *) data_buf = cpu_to_le32 (
RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
OK (4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
- *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
-#endif /* CONFIG_440EP || CONFIG_MPC5200 */
+ *(__u32 *) data_buf = cpu_to_le32 (RD_RH_PORTSTAT); OK (4);
case RH_CLEAR_FEATURE | RH_ENDPOINT:
switch (wValue) {