[PATH] ppc32: Add usb support to IBM stb04xxx platforms

[Eugene Surovegin]

On Tue, Aug 09, 2005 at 11:53:27AM -0700, Dale Farnsworth wrote:
[snip]

> Index: linux-2.5-usb-405/arch/ppc/platforms/4xx/redwood5.c
> ===
> --- linux-2.5-usb-405.orig/arch/ppc/platforms/4xx/redwood5.c
> +++ linux-2.5-usb-405/arch/ppc/platforms/4xx/redwood5.c
> @@ -52,8 +52,18 @@
>  void __init
>  redwood5_setup_arch(void)
>  {
> + u32 mask;
> +
>   ppc4xx_setup_arch();
>  
> + /*
> +  * Set up USB interrupt as positive polarity and level-sensitive.
> +  * Firmware should do this, but apparently does not.
> +  */
> + mask = 1 << (31 - USB0_IRQ);
> + mtdcr(DCRN_UIC_PR(UIC0), mfdcr(DCRN_UIC_PR(UIC0)) | mask);
> + mtdcr(DCRN_UIC_TR(UIC0), mfdcr(DCRN_UIC_TR(UIC0)) & ~mask);
> +

Please, DO NOT DO THIS. 

There is a way to configure UIC settings without messing with UIC 
registers directly. Refer to asm-ppc/ppc4xx_pic.h and other 4xx board 
ports for more information.

-- 
Eugene

[PATH] ppc32: Add usb support to IBM stb04xxx platforms

[Dale Farnsworth]

[ I previously submitted this on March 31st.  Though I received a copy
back from the linuxppc-embedded mailing list, I don't find a copy in
the archive.  (The same thing happend to my submission of asm-ppc/usb.h.)
So I'm resending. ]

Signed-off-by: Dale Farnsworth 

Index: linux-2.5-usb-405/arch/ppc/platforms/4xx/ibmstb4.c
===
--- linux-2.5-usb-405.orig/arch/ppc/platforms/4xx/ibmstb4.c
+++ linux-2.5-usb-405/arch/ppc/platforms/4xx/ibmstb4.c
@@ -72,12 +72,43 @@
  .irq  = IDE0_IRQ,
  .pm   = OCP_CPM_NA,
},
-   { .vendor   = OCP_VENDOR_IBM,
- .function = OCP_FUNC_USB,
- .paddr= USB0_BASE,
- .irq  = USB0_IRQ,
- .pm   = OCP_CPM_NA,
-   },
{ .vendor   = OCP_VENDOR_INVALID,
}
 };
+
+static struct resource ohci_usb_resources[] = {
+   [0] = {
+   .start  = USB0_BASE,
+   .end= USB0_BASE + USB0_SIZE - 1,
+   .flags  = IORESOURCE_MEM,
+   },
+   [1] = {
+   .start  = USB0_IRQ,
+   .end= USB0_IRQ,
+   .flags  = IORESOURCE_IRQ,
+   },
+};
+
+static u64 dma_mask = 0xULL;
+
+static struct platform_device ohci_usb_device = {
+   .name   = "ppc-soc-ohci",
+   .id = 0,
+   .num_resources  = ARRAY_SIZE(ohci_usb_resources),
+   .resource   = ohci_usb_resources,
+   .dev= {
+   .dma_mask = &dma_mask,
+   .coherent_dma_mask = 0xULL,
+   }
+};
+
+static struct platform_device *ibmstb4_devs[] __initdata = {
+   &ohci_usb_device,
+};
+
+static int __init
+ibmstb4_platform_add_devices(void)
+{
+   return platform_add_devices(ibmstb4_devs, ARRAY_SIZE(ibmstb4_devs));
+}
+arch_initcall(ibmstb4_platform_add_devices);
Index: linux-2.5-usb-405/arch/ppc/platforms/4xx/ibmstb4.h
===
--- linux-2.5-usb-405.orig/arch/ppc/platforms/4xx/ibmstb4.h
+++ linux-2.5-usb-405/arch/ppc/platforms/4xx/ibmstb4.h
@@ -73,9 +73,9 @@
 #define OPB0_BASE  0x4000
 #define GPIO0_BASE 0x4006
 
+#define USB0_BASE  0x4001
+#define USB0_SIZE  0xA0
 #define USB0_IRQ   18
-#define USB0_BASE  STB04xxx_MAP_IO_ADDR(0x4001)
-#define USB0_EXTENT 4096
 
 #define IIC_NUMS 2
 #define UART_NUMS  3
Index: linux-2.5-usb-405/arch/ppc/platforms/4xx/redwood5.c
===
--- linux-2.5-usb-405.orig/arch/ppc/platforms/4xx/redwood5.c
+++ linux-2.5-usb-405/arch/ppc/platforms/4xx/redwood5.c
@@ -52,8 +52,18 @@
 void __init
 redwood5_setup_arch(void)
 {
+   u32 mask;
+
ppc4xx_setup_arch();
 
+   /*
+* Set up USB interrupt as positive polarity and level-sensitive.
+* Firmware should do this, but apparently does not.
+*/
+   mask = 1 << (31 - USB0_IRQ);
+   mtdcr(DCRN_UIC_PR(UIC0), mfdcr(DCRN_UIC_PR(UIC0)) | mask);
+   mtdcr(DCRN_UIC_TR(UIC0), mfdcr(DCRN_UIC_TR(UIC0)) & ~mask);
+
 #ifdef CONFIG_DEBUG_BRINGUP
printk("\n");
printk("machine\t: %s\n", PPC4xx_MACHINE_NAME);
___
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