diff options
Diffstat (limited to 'drivers/usb/gadget/g_ffs.c')
| -rw-r--r-- | drivers/usb/gadget/g_ffs.c | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c new file mode 100644 index 000000000000..4b0e4a040d6f --- /dev/null +++ b/drivers/usb/gadget/g_ffs.c @@ -0,0 +1,426 @@ +#include <linux/module.h> +#include <linux/utsname.h> + + +/* + * kbuild is not very cooperative with respect to linking separately + * compiled library objects into one module. So for now we won't use + * separate compilation ... ensuring init/exit sections work to shrink + * the runtime footprint, and giving us at least some parts of what + * a "gcc --combine ... part1.c part2.c part3.c ... " build would. + */ + +#include "composite.c" +#include "usbstring.c" +#include "config.c" +#include "epautoconf.c" + +#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS +# if defined USB_ETH_RNDIS +# undef USB_ETH_RNDIS +# endif +# ifdef CONFIG_USB_FUNCTIONFS_RNDIS +# define USB_ETH_RNDIS y +# endif + +# include "f_ecm.c" +# include "f_subset.c" +# ifdef USB_ETH_RNDIS +# include "f_rndis.c" +# include "rndis.c" +# endif +# include "u_ether.c" + +static u8 gfs_hostaddr[ETH_ALEN]; +#else +# if !defined CONFIG_USB_FUNCTIONFS_GENERIC +# define CONFIG_USB_FUNCTIONFS_GENERIC +# endif +# define gether_cleanup() do { } while (0) +# define gether_setup(gadget, hostaddr) ((int)0) +#endif + +#include "f_fs.c" + + +#define DRIVER_NAME "g_ffs" +#define DRIVER_DESC "USB Function Filesystem" +#define DRIVER_VERSION "24 Aug 2004" + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Michal Nazarewicz"); +MODULE_LICENSE("GPL"); + + +static unsigned short gfs_vendor_id = 0x0525; /* XXX NetChip */ +static unsigned short gfs_product_id = 0xa4ac; /* XXX */ + +static struct usb_device_descriptor gfs_dev_desc = { + .bLength = sizeof gfs_dev_desc, + .bDescriptorType = USB_DT_DEVICE, + + .bcdUSB = cpu_to_le16(0x0200), + .bDeviceClass = USB_CLASS_PER_INTERFACE, + + /* Vendor and product id can be overridden by module parameters. */ + /* .idVendor = cpu_to_le16(gfs_vendor_id), */ + /* .idProduct = cpu_to_le16(gfs_product_id), */ + /* .bcdDevice = f(hardware) */ + /* .iManufacturer = DYNAMIC */ + /* .iProduct = DYNAMIC */ + /* NO SERIAL NUMBER */ + .bNumConfigurations = 1, +}; + +#define GFS_MODULE_PARAM_DESC(name, field) \ + MODULE_PARM_DESC(name, "Value of the " #field " field of the device descriptor sent to the host. Takes effect only prior to the user-space driver registering to the FunctionFS.") + +module_param_named(usb_class, gfs_dev_desc.bDeviceClass, byte, 0644); +GFS_MODULE_PARAM_DESC(usb_class, bDeviceClass); +module_param_named(usb_subclass, gfs_dev_desc.bDeviceSubClass, byte, 0644); +GFS_MODULE_PARAM_DESC(usb_subclass, bDeviceSubClass); +module_param_named(usb_protocol, gfs_dev_desc.bDeviceProtocol, byte, 0644); +GFS_MODULE_PARAM_DESC(usb_protocol, bDeviceProtocol); +module_param_named(usb_vendor, gfs_vendor_id, ushort, 0644); +GFS_MODULE_PARAM_DESC(usb_vendor, idVendor); +module_param_named(usb_product, gfs_product_id, ushort, 0644); +GFS_MODULE_PARAM_DESC(usb_product, idProduct); + + + +static const struct usb_descriptor_header *gfs_otg_desc[] = { + (const struct usb_descriptor_header *) + &(const struct usb_otg_descriptor) { + .bLength = sizeof(struct usb_otg_descriptor), + .bDescriptorType = USB_DT_OTG, + + /* REVISIT SRP-only hardware is possible, although + * it would not be called "OTG" ... */ + .bmAttributes = USB_OTG_SRP | USB_OTG_HNP, + }, + + NULL +}; + +/* string IDs are assigned dynamically */ + +enum { + GFS_STRING_MANUFACTURER_IDX, + GFS_STRING_PRODUCT_IDX, +#ifdef CONFIG_USB_FUNCTIONFS_RNDIS + GFS_STRING_RNDIS_CONFIG_IDX, +#endif +#ifdef CONFIG_USB_FUNCTIONFS_ETH + GFS_STRING_ECM_CONFIG_IDX, +#endif +#ifdef CONFIG_USB_FUNCTIONFS_GENERIC + GFS_STRING_GENERIC_CONFIG_IDX, +#endif +}; + +static char gfs_manufacturer[50]; +static const char gfs_driver_desc[] = DRIVER_DESC; +static const char gfs_short_name[] = DRIVER_NAME; + +static struct usb_string gfs_strings[] = { + [GFS_STRING_MANUFACTURER_IDX].s = gfs_manufacturer, + [GFS_STRING_PRODUCT_IDX].s = gfs_driver_desc, +#ifdef CONFIG_USB_FUNCTIONFS_RNDIS + [GFS_STRING_RNDIS_CONFIG_IDX].s = "FunctionFS + RNDIS", +#endif +#ifdef CONFIG_USB_FUNCTIONFS_ETH + [GFS_STRING_ECM_CONFIG_IDX].s = "FunctionFS + ECM", +#endif +#ifdef CONFIG_USB_FUNCTIONFS_GENERIC + [GFS_STRING_GENERIC_CONFIG_IDX].s = "FunctionFS", +#endif + { } /* end of list */ +}; + +static struct usb_gadget_strings *gfs_dev_strings[] = { + &(struct usb_gadget_strings) { + .language = 0x0409, /* en-us */ + .strings = gfs_strings, + }, + NULL, +}; + + +#ifdef CONFIG_USB_FUNCTIONFS_RNDIS +static int gfs_do_rndis_config(struct usb_configuration *c); + +static struct usb_configuration gfs_rndis_config_driver = { + .label = "FunctionFS + RNDIS", + .bind = gfs_do_rndis_config, + .bConfigurationValue = 1, + /* .iConfiguration = DYNAMIC */ + .bmAttributes = USB_CONFIG_ATT_SELFPOWER, +}; +# define gfs_add_rndis_config(cdev) \ + usb_add_config(cdev, &gfs_rndis_config_driver) +#else +# define gfs_add_rndis_config(cdev) 0 +#endif + + +#ifdef CONFIG_USB_FUNCTIONFS_ETH +static int gfs_do_ecm_config(struct usb_configuration *c); + +static struct usb_configuration gfs_ecm_config_driver = { + .label = "FunctionFS + ECM", + .bind = gfs_do_ecm_config, + .bConfigurationValue = 1, + /* .iConfiguration = DYNAMIC */ + .bmAttributes = USB_CONFIG_ATT_SELFPOWER, +}; +# define gfs_add_ecm_config(cdev) \ + usb_add_config(cdev, &gfs_ecm_config_driver) +#else +# define gfs_add_ecm_config(cdev) 0 +#endif + + +#ifdef CONFIG_USB_FUNCTIONFS_GENERIC +static int gfs_do_generic_config(struct usb_configuration *c); + +static struct usb_configuration gfs_generic_config_driver = { + .label = "FunctionFS", + .bind = gfs_do_generic_config, + .bConfigurationValue = 2, + /* .iConfiguration = DYNAMIC */ + .bmAttributes = USB_CONFIG_ATT_SELFPOWER, +}; +# define gfs_add_generic_config(cdev) \ + usb_add_config(cdev, &gfs_generic_config_driver) +#else +# define gfs_add_generic_config(cdev) 0 +#endif + + +static int gfs_bind(struct usb_composite_dev *cdev); +static int gfs_unbind(struct usb_composite_dev *cdev); + +static struct usb_composite_driver gfs_driver = { + .name = gfs_short_name, + .dev = &gfs_dev_desc, + .strings = gfs_dev_strings, + .bind = gfs_bind, + .unbind = gfs_unbind, +}; + + +static struct ffs_data *gfs_ffs_data; +static unsigned long gfs_registered; + + +static int gfs_init(void) +{ + ENTER(); + + return functionfs_init(); +} +module_init(gfs_init); + +static void gfs_exit(void) +{ + ENTER(); + + if (test_and_clear_bit(0, &gfs_registered)) + usb_composite_unregister(&gfs_driver); + + functionfs_cleanup(); +} +module_exit(gfs_exit); + + +static int functionfs_ready_callback(struct ffs_data *ffs) +{ + int ret; + + ENTER(); + + if (WARN_ON(test_and_set_bit(0, &gfs_registered))) + return -EBUSY; + + gfs_ffs_data = ffs; + ret = usb_composite_register(&gfs_driver); + if (unlikely(ret < 0)) + clear_bit(0, &gfs_registered); + return ret; +} + +static void functionfs_closed_callback(struct ffs_data *ffs) +{ + ENTER(); + + if (test_and_clear_bit(0, &gfs_registered)) + usb_composite_unregister(&gfs_driver); +} + + +static int functionfs_check_dev_callback(const char *dev_name) +{ + return 0; +} + + + +static int gfs_bind(struct usb_composite_dev *cdev) +{ + int ret; + + ENTER(); + + if (WARN_ON(!gfs_ffs_data)) + return -ENODEV; + + ret = gether_setup(cdev->gadget, gfs_hostaddr); + if (unlikely(ret < 0)) + goto error_quick; + + gfs_dev_desc.idVendor = cpu_to_le16(gfs_vendor_id); + gfs_dev_desc.idProduct = cpu_to_le16(gfs_product_id); + + snprintf(gfs_manufacturer, sizeof gfs_manufacturer, "%s %s with %s", + init_utsname()->sysname, init_utsname()->release, + cdev->gadget->name); + ret = usb_string_id(cdev); + if (unlikely(ret < 0)) + goto error; + gfs_strings[GFS_STRING_MANUFACTURER_IDX].id = ret; + gfs_dev_desc.iManufacturer = ret; + + ret = usb_string_id(cdev); + if (unlikely(ret < 0)) + goto error; + gfs_strings[GFS_STRING_PRODUCT_IDX].id = ret; + gfs_dev_desc.iProduct = ret; + +#ifdef CONFIG_USB_FUNCTIONFS_RNDIS + ret = usb_string_id(cdev); + if (unlikely(ret < 0)) + goto error; + gfs_strings[GFS_STRING_RNDIS_CONFIG_IDX].id = ret; + gfs_rndis_config_driver.iConfiguration = ret; +#endif + +#ifdef CONFIG_USB_FUNCTIONFS_ETH + ret = usb_string_id(cdev); + if (unlikely(ret < 0)) + goto error; + gfs_strings[GFS_STRING_ECM_CONFIG_IDX].id = ret; + gfs_ecm_config_driver.iConfiguration = ret; +#endif + +#ifdef CONFIG_USB_FUNCTIONFS_GENERIC + ret = usb_string_id(cdev); + if (unlikely(ret < 0)) + goto error; + gfs_strings[GFS_STRING_GENERIC_CONFIG_IDX].id = ret; + gfs_generic_config_driver.iConfiguration = ret; +#endif + + ret = functionfs_bind(gfs_ffs_data, cdev); + if (unlikely(ret < 0)) + goto error; + + ret = gfs_add_rndis_config(cdev); + if (unlikely(ret < 0)) + goto error_unbind; + + ret = gfs_add_ecm_config(cdev); + if (unlikely(ret < 0)) + goto error_unbind; + + ret = gfs_add_generic_config(cdev); + if (unlikely(ret < 0)) + goto error_unbind; + + return 0; + +error_unbind: + functionfs_unbind(gfs_ffs_data); +error: + gether_cleanup(); +error_quick: + gfs_ffs_data = NULL; + return ret; +} + +static int gfs_unbind(struct usb_composite_dev *cdev) +{ + ENTER(); + + /* We may have been called in an error recovery frem + * composite_bind() after gfs_unbind() failure so we need to + * check if gfs_ffs_data is not NULL since gfs_bind() handles + * all error recovery itself. I'd rather we werent called + * from composite on orror recovery, but what you're gonna + * do...? */ + + if (gfs_ffs_data) { + gether_cleanup(); + functionfs_unbind(gfs_ffs_data); + gfs_ffs_data = NULL; + } + + return 0; +} + + +static int __gfs_do_config(struct usb_configuration *c, + int (*eth)(struct usb_configuration *c, u8 *ethaddr), + u8 *ethaddr) +{ + int ret; + + if (WARN_ON(!gfs_ffs_data)) + return -ENODEV; + + if (gadget_is_otg(c->cdev->gadget)) { + c->descriptors = gfs_otg_desc; + c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; + } + + if (eth) { + ret = eth(c, ethaddr); + if (unlikely(ret < 0)) + return ret; + } + + ret = functionfs_add(c->cdev, c, gfs_ffs_data); + if (unlikely(ret < 0)) + return ret; + + return 0; +} + +#ifdef CONFIG_USB_FUNCTIONFS_RNDIS +static int gfs_do_rndis_config(struct usb_configuration *c) +{ + ENTER(); + + return __gfs_do_config(c, rndis_bind_config, gfs_hostaddr); +} +#endif + +#ifdef CONFIG_USB_FUNCTIONFS_ETH +static int gfs_do_ecm_config(struct usb_configuration *c) +{ + ENTER(); + + return __gfs_do_config(c, + can_support_ecm(c->cdev->gadget) + ? ecm_bind_config : geth_bind_config, + gfs_hostaddr); +} +#endif + +#ifdef CONFIG_USB_FUNCTIONFS_GENERIC +static int gfs_do_generic_config(struct usb_configuration *c) +{ + ENTER(); + + return __gfs_do_config(c, NULL, NULL); +} +#endif |