From: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Date: Mon, 24 May 2010 11:45:47 +0000 (-0400)
Subject: First USB sketch.
X-Git-Url: http://git.cascardo.info/?p=cascardo%2Fkernel%2Fslides%2F.git;a=commitdiff_plain

First USB sketch.
---

diff --git a/13buses/usb b/13buses/usb
new file mode 100644
index 0000000..0ae9a96
--- /dev/null
+++ b/13buses/usb
@@ -0,0 +1,80 @@
+%USB
+%Thadeu Cascardo
+
+# Universal Serial Bus
+
+* USB 1.0 and 1.1, 1.5Mbps and 12Mbps
+* USB 2.0 - up to 480Mbps
+* USB 3.0 - up to 5Gbps
+* Wireless USB - over Ultra Wideband
+
+# USB - Cont.
+
+* A master/slave bus: the master asks the slave to send data
+* Auto-configurable and hotplugable
+* Standards specifications, allowing device classes, with no specific driver
+* HCDs, USB devices and Gadget devices and their respective drivers
+
+# USB Basics
+
+* Configurations
+* Interfaces
+* Settings
+* Endpoints
+* URBs
+
+# Endpoints and URBs
+
+* IN and OUT Endpoints
+* Control Endpoints
+* Interrupt Endpoints
+* Bulk Endpoints
+* Isochronous Endpoints
+
+# USB IDs
+
+* struct usb\\_device\\_id
+* USB\\_DEVICE
+* Others
+
+# USB Driver
+
+* struct usb\\_driver
+	- name
+	- id\\_table
+	- probe
+	- disconnect
+
+# USB Interface
+
+* struct usb\\_interface
+	- struct usb\\_host\\_interface cur\\_altsetting
+		* desc.bNumEndpoints
+		* struct usb\\_endpoint\\_descriptor endpoint[].desc
+* usb\\_get\\_intf
+* usb\\_put\\_intf
+
+# Endpoints
+
+* struct usb\\_endpoint\\_descriptor
+* usb\\_endpoint\\_is\\_isoc\\_in
+* usb\\_endpoint\\_num
+
+# URBs
+
+* struct urb
+	- status
+	- transfer\\_buffer
+	- actual\\_length
+* usb\\_alloc\\_urb
+* usb\\_free\\_usb
+* usb\\_submit\\_urb
+* usb\\_kill\\_urb
+* usb\\_fill\\_control\\_urb
+* usb\\_fill\\_bulk\\_urb
+* usb\\_control\\_msg
+
+# URBs
+
+* Callbacks execute in interrupt context
+* May resubmit an URB, but must use GFP\\_ATOMIC