253 lines
6.1 KiB
C
253 lines
6.1 KiB
C
#include <common.h>
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#include <errno.h>
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#include <init.h>
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#include <usb/ch9.h>
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#include <usb/gadget.h>
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#include <usb/composite.h>
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#include <usb/usbserial.h>
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#include <asm/byteorder.h>
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#include "u_serial.h"
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/* Defines */
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#define GS_VERSION_STR "v2.4"
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#define GS_VERSION_NUM 0x2400
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#define GS_LONG_NAME "Gadget Serial"
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#define GS_VERSION_NAME GS_LONG_NAME " " GS_VERSION_STR
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/* Thanks to NetChip Technologies for donating this product ID.
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*
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* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
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* Instead: allocate your own, using normal USB-IF procedures.
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*/
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#define GS_VENDOR_ID 0x0525 /* NetChip */
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#define GS_PRODUCT_ID 0xa4a6 /* Linux-USB Serial Gadget */
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#define GS_CDC_PRODUCT_ID 0xa4a7 /* ... as CDC-ACM */
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#define GS_CDC_OBEX_PRODUCT_ID 0xa4a9 /* ... as CDC-OBEX */
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/* string IDs are assigned dynamically */
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#define STRING_MANUFACTURER_IDX 0
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#define STRING_PRODUCT_IDX 1
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#define STRING_DESCRIPTION_IDX 2
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static char manufacturer[50];
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static struct usb_string strings_dev[] = {
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[STRING_MANUFACTURER_IDX].s = manufacturer,
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[STRING_PRODUCT_IDX].s = GS_VERSION_NAME,
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[STRING_DESCRIPTION_IDX].s = NULL /* updated; f(use_acm) */,
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{ } /* end of list */
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};
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static struct usb_gadget_strings stringtab_dev = {
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.language = 0x0409, /* en-us */
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.strings = strings_dev,
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};
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static struct usb_gadget_strings *dev_strings[] = {
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&stringtab_dev,
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NULL,
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};
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static int use_acm = 1;
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#ifdef HAVE_OBEX
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static int use_obex = 0;
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#endif
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static unsigned n_ports = 1;
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static int serial_bind_config(struct usb_configuration *c)
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{
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unsigned i;
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int status = 0;
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for (i = 0; i < n_ports && status == 0; i++) {
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if (use_acm)
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status = acm_bind_config(c, i);
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#ifdef HAVE_OBEX
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else if (use_obex)
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status = obex_bind_config(c, i);
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#endif
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else
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status = gser_bind_config(c, i);
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}
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return status;
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}
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static struct usb_device_descriptor device_desc = {
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.bLength = USB_DT_DEVICE_SIZE,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = cpu_to_le16(0x0200),
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/* .bDeviceClass = f(use_acm) */
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.bDeviceSubClass = 0,
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.bDeviceProtocol = 0,
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/* .bMaxPacketSize0 = f(hardware) */
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.idVendor = cpu_to_le16(GS_VENDOR_ID),
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/* .idProduct = f(use_acm) */
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/* .bcdDevice = f(hardware) */
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/* .iManufacturer = DYNAMIC */
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/* .iProduct = DYNAMIC */
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.bNumConfigurations = 1,
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};
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static struct usb_configuration serial_config_driver = {
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/* .label = f(use_acm) */
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.bind = serial_bind_config,
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/* .bConfigurationValue = f(use_acm) */
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/* .iConfiguration = DYNAMIC */
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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};
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static int gs_bind(struct usb_composite_dev *cdev)
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{
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int gcnum;
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struct usb_gadget *gadget = cdev->gadget;
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int status;
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status = gserial_setup(cdev->gadget, n_ports);
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if (status < 0)
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return status;
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/* Allocate string descriptor numbers ... note that string
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* contents can be overridden by the composite_dev glue.
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*/
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/* device description: manufacturer, product */
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sprintf(manufacturer, "barebox with %s",
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gadget->name);
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status = usb_string_id(cdev);
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if (status < 0)
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goto fail;
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strings_dev[STRING_MANUFACTURER_IDX].id = status;
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device_desc.iManufacturer = status;
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status = usb_string_id(cdev);
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if (status < 0)
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goto fail;
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strings_dev[STRING_PRODUCT_IDX].id = status;
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device_desc.iProduct = status;
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/* config description */
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status = usb_string_id(cdev);
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if (status < 0)
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goto fail;
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strings_dev[STRING_DESCRIPTION_IDX].id = status;
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serial_config_driver.iConfiguration = status;
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/* set up other descriptors */
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// gcnum = usb_gadget_controller_number(gadget);
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gcnum = 0x19;
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if (gcnum >= 0)
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device_desc.bcdDevice = cpu_to_le16(GS_VERSION_NUM | gcnum);
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else {
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/* this is so simple (for now, no altsettings) that it
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* SHOULD NOT have problems with bulk-capable hardware.
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* so warn about unrcognized controllers -- don't panic.
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*
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* things like configuration and altsetting numbering
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* can need hardware-specific attention though.
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*/
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pr_warning("gs_bind: controller '%s' not recognized\n",
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gadget->name);
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device_desc.bcdDevice =
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cpu_to_le16(GS_VERSION_NUM | 0x0099);
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}
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/* register our configuration */
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status = usb_add_config(cdev, &serial_config_driver);
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if (status < 0)
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goto fail;
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INFO(cdev, "%s\n", GS_VERSION_NAME);
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return 0;
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fail:
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// gserial_cleanup();
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return status;
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}
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static struct usb_composite_driver gserial_driver = {
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.name = "g_serial",
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.dev = &device_desc,
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.strings = dev_strings,
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.bind = gs_bind,
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};
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int usb_serial_register(struct usb_serial_pdata *pdata)
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{
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/* We *could* export two configs; that'd be much cleaner...
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* but neither of these product IDs was defined that way.
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*/
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/*
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* PXA CPU suffer a silicon bug which prevents them from being a
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* compound device, forbiding the ACM configurations.
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*/
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#ifdef CONFIG_ARCH_PXA2XX
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use_acm = 0;
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#endif
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switch (pdata->mode) {
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case 1:
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#ifdef HAVE_OBEX
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use_obex = 1;
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#endif
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use_acm = 0;
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break;
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case 2:
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#ifdef HAVE_OBEX
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use_obex = 1;
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#endif
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use_acm = 0;
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break;
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default:
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#ifdef HAVE_OBEX
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use_obex = 0;
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#endif
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use_acm = 1;
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}
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if (use_acm) {
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serial_config_driver.label = "CDC ACM config";
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serial_config_driver.bConfigurationValue = 2;
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device_desc.bDeviceClass = USB_CLASS_COMM;
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device_desc.idProduct =
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cpu_to_le16(GS_CDC_PRODUCT_ID);
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}
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#ifdef HAVE_OBEX
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else if (use_obex) {
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serial_config_driver.label = "CDC OBEX config";
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serial_config_driver.bConfigurationValue = 3;
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device_desc.bDeviceClass = USB_CLASS_COMM;
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device_desc.idProduct =
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cpu_to_le16(GS_CDC_OBEX_PRODUCT_ID);
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}
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#endif
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else {
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serial_config_driver.label = "Generic Serial config";
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serial_config_driver.bConfigurationValue = 1;
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device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
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device_desc.idProduct =
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cpu_to_le16(GS_PRODUCT_ID);
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}
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strings_dev[STRING_DESCRIPTION_IDX].s = serial_config_driver.label;
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if (pdata->idVendor)
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device_desc.idVendor = pdata->idVendor;
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if (pdata->idProduct)
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device_desc.idProduct = pdata->idProduct;
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strings_dev[STRING_MANUFACTURER_IDX].s = pdata->manufacturer;
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strings_dev[STRING_PRODUCT_IDX].s = pdata->productname;
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return usb_composite_register(&gserial_driver);
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}
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void usb_serial_unregister(void)
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{
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usb_composite_unregister(&gserial_driver);
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}
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