usb: gadget: f_uac1: convert to new function interface with backward compatibility
Converting uac1 to the new function interface requires converting the USB uac1's function code and its users. This patch converts the f_uac1.c to the new function interface. The file is now compiled into a separate usb_f_uac1.ko module. The old function interface is provided by means of a preprocessor conditional directives. After all users are converted, the old interface can be removed. Tested-by: Sebastian Reimers <sebastian.reimers@googlemail.com> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz
Felipe Balbi
parent
af1a58ca00
commit
f3a3406b3f
@ -181,6 +181,9 @@ config USB_F_MASS_STORAGE
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config USB_F_FS
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tristate
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config USB_F_UAC1
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tristate
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config USB_F_UAC2
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tristate
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@ -32,5 +32,7 @@ usb_f_mass_storage-y := f_mass_storage.o storage_common.o
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obj-$(CONFIG_USB_F_MASS_STORAGE)+= usb_f_mass_storage.o
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usb_f_fs-y := f_fs.o
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obj-$(CONFIG_USB_F_FS) += usb_f_fs.o
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usb_f_uac1-y := f_uac1.o u_uac1.o
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obj-$(CONFIG_USB_F_UAC1) += usb_f_uac1.o
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usb_f_uac2-y := f_uac2.o
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obj-$(CONFIG_USB_F_UAC2) += usb_f_uac2.o
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@ -11,13 +11,17 @@
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/atomic.h>
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#include "u_uac1.h"
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#ifdef USBF_UAC1_INCLUDED
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#include "u_uac1.c"
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#endif
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#define OUT_EP_MAX_PACKET_SIZE 200
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#ifdef USBF_UAC1_INCLUDED
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static int req_buf_size = OUT_EP_MAX_PACKET_SIZE;
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module_param(req_buf_size, int, S_IRUGO);
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MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size");
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@ -29,6 +33,7 @@ MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count");
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static int audio_buf_size = 48000;
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module_param(audio_buf_size, int, S_IRUGO);
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MODULE_PARM_DESC(audio_buf_size, "Audio buffer size");
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#endif
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static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value);
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static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
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@ -47,7 +52,7 @@ static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
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#define F_AUDIO_NUM_INTERFACES 2
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/* B.3.1 Standard AC Interface Descriptor */
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static struct usb_interface_descriptor ac_interface_desc __initdata = {
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static struct usb_interface_descriptor ac_interface_desc = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bNumEndpoints = 0,
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@ -189,7 +194,7 @@ static struct usb_endpoint_descriptor as_out_ep_desc = {
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};
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/* Class-specific AS ISO OUT Endpoint Descriptor */
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static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = {
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static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
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.bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
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.bDescriptorType = USB_DT_CS_ENDPOINT,
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.bDescriptorSubtype = UAC_EP_GENERAL,
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@ -198,7 +203,7 @@ static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = {
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.wLockDelay = __constant_cpu_to_le16(1),
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};
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static struct usb_descriptor_header *f_audio_desc[] __initdata = {
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static struct usb_descriptor_header *f_audio_desc[] = {
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(struct usb_descriptor_header *)&ac_interface_desc,
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(struct usb_descriptor_header *)&ac_header_desc,
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@ -332,8 +337,17 @@ static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req)
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struct f_audio *audio = req->context;
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struct usb_composite_dev *cdev = audio->card.func.config->cdev;
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struct f_audio_buf *copy_buf = audio->copy_buf;
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#ifndef USBF_UAC1_INCLUDED
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struct f_uac1_opts *opts;
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int audio_buf_size;
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#endif
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int err;
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#ifndef USBF_UAC1_INCLUDED
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opts = container_of(audio->card.func.fi, struct f_uac1_opts,
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func_inst);
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audio_buf_size = opts->audio_buf_size;
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#endif
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if (!copy_buf)
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return -EINVAL;
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@ -578,10 +592,21 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
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struct usb_composite_dev *cdev = f->config->cdev;
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struct usb_ep *out_ep = audio->out_ep;
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struct usb_request *req;
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#ifndef USBF_UAC1_INCLUDED
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struct f_uac1_opts *opts;
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int req_buf_size, req_count, audio_buf_size;
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#endif
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int i = 0, err = 0;
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DBG(cdev, "intf %d, alt %d\n", intf, alt);
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#ifndef USBF_UAC1_INCLUDED
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opts = container_of(f->fi, struct f_uac1_opts, func_inst);
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req_buf_size = opts->req_buf_size;
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req_count = opts->req_count;
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audio_buf_size = opts->audio_buf_size;
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#endif
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if (intf == 1) {
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if (alt == 1) {
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usb_ep_enable(out_ep);
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@ -657,13 +682,50 @@ static void f_audio_build_desc(struct f_audio *audio)
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}
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/* audio function driver setup/binding */
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static int __init
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static int
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f_audio_bind(struct usb_configuration *c, struct usb_function *f)
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{
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struct usb_composite_dev *cdev = c->cdev;
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struct f_audio *audio = func_to_audio(f);
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int status;
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struct usb_ep *ep = NULL;
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#ifndef USBF_UAC1_INCLUDED
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struct f_uac1_opts *audio_opts;
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audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst);
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audio->card.gadget = c->cdev->gadget;
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audio_opts->card = &audio->card;
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/* set up ASLA audio devices */
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if (!audio_opts->bound) {
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status = gaudio_setup(&audio->card);
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if (status < 0)
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return status;
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audio_opts->bound = true;
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}
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#else
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audio->card.gadget = c->cdev->gadget;
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#endif
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if (strings_uac1[0].id == 0) {
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status = usb_string_ids_tab(c->cdev, strings_uac1);
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if (status < 0)
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#ifdef USBF_UAC1_INCLUDED
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return status;
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#else
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goto fail;
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#endif
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ac_interface_desc.iInterface = strings_uac1[STR_AC_IF].id;
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input_terminal_desc.iTerminal =
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strings_uac1[STR_INPUT_TERMINAL].id;
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input_terminal_desc.iChannelNames =
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strings_uac1[STR_INPUT_TERMINAL_CH_NAMES].id;
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feature_unit_desc.iFeature = strings_uac1[STR_FEAT_DESC_0].id;
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output_terminal_desc.iTerminal =
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strings_uac1[STR_OUTPUT_TERMINAL].id;
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as_interface_alt_0_desc.iInterface =
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strings_uac1[STR_AS_IF_ALT0].id;
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as_interface_alt_1_desc.iInterface =
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strings_uac1[STR_AS_IF_ALT1].id;
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}
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f_audio_build_desc(audio);
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@ -698,19 +760,24 @@ f_audio_bind(struct usb_configuration *c, struct usb_function *f)
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return 0;
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fail:
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#ifndef USBF_UAC1_INCLUDED
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gaudio_cleanup(&audio->card);
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#endif
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if (ep)
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ep->driver_data = NULL;
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return status;
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}
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#ifdef USBF_UAC1_INCLUDED
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static void
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f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
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old_f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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struct f_audio *audio = func_to_audio(f);
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usb_free_all_descriptors(f);
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kfree(audio);
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}
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#endif
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/*-------------------------------------------------------------------------*/
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@ -727,7 +794,7 @@ static int generic_get_cmd(struct usb_audio_control *con, u8 cmd)
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}
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/* Todo: add more control selecotor dynamically */
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static int __init control_selector_init(struct f_audio *audio)
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static int control_selector_init(struct f_audio *audio)
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{
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INIT_LIST_HEAD(&audio->cs);
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list_add(&feature_unit.list, &audio->cs);
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@ -744,6 +811,7 @@ static int __init control_selector_init(struct f_audio *audio)
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return 0;
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}
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#ifdef USBF_UAC1_INCLUDED
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/**
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* audio_bind_config - add USB audio function to a configuration
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* @c: the configuration to supcard the USB audio function
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@ -756,24 +824,6 @@ static int __init audio_bind_config(struct usb_configuration *c)
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struct f_audio *audio;
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int status;
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if (strings_uac1[0].id == 0) {
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status = usb_string_ids_tab(c->cdev, strings_uac1);
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if (status < 0)
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return status;
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ac_interface_desc.iInterface = strings_uac1[STR_AC_IF].id;
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input_terminal_desc.iTerminal =
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strings_uac1[STR_INPUT_TERMINAL].id;
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input_terminal_desc.iChannelNames =
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strings_uac1[STR_INPUT_TERMINAL_CH_NAMES].id;
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feature_unit_desc.iFeature = strings_uac1[STR_FEAT_DESC_0].id;
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output_terminal_desc.iTerminal =
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strings_uac1[STR_OUTPUT_TERMINAL].id;
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as_interface_alt_0_desc.iInterface =
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strings_uac1[STR_AS_IF_ALT0].id;
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as_interface_alt_1_desc.iInterface =
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strings_uac1[STR_AS_IF_ALT1].id;
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}
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/* allocate and initialize one new instance */
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audio = kzalloc(sizeof *audio, GFP_KERNEL);
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if (!audio)
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@ -789,10 +839,9 @@ static int __init audio_bind_config(struct usb_configuration *c)
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status = gaudio_setup(&audio->card);
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if (status < 0)
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goto setup_fail;
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audio->card.func.strings = uac1_strings;
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audio->card.func.bind = f_audio_bind;
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audio->card.func.unbind = f_audio_unbind;
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audio->card.func.unbind = old_f_audio_unbind;
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audio->card.func.set_alt = f_audio_set_alt;
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audio->card.func.setup = f_audio_setup;
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audio->card.func.disable = f_audio_disable;
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@ -816,3 +865,71 @@ setup_fail:
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kfree(audio);
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return status;
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}
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#else
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static void f_audio_free_inst(struct usb_function_instance *f)
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{
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struct f_uac1_opts *opts;
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opts = container_of(f, struct f_uac1_opts, func_inst);
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gaudio_cleanup(opts->card);
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kfree(opts);
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}
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static struct usb_function_instance *f_audio_alloc_inst(void)
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{
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struct f_uac1_opts *opts;
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opts = kzalloc(sizeof(*opts), GFP_KERNEL);
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if (!opts)
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return ERR_PTR(-ENOMEM);
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opts->func_inst.free_func_inst = f_audio_free_inst;
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return &opts->func_inst;
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}
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static void f_audio_free(struct usb_function *f)
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{
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struct f_audio *audio = func_to_audio(f);
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kfree(audio);
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}
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static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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usb_free_all_descriptors(f);
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}
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static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
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{
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struct f_audio *audio;
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/* allocate and initialize one new instance */
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audio = kzalloc(sizeof(*audio), GFP_KERNEL);
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if (!audio)
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return ERR_PTR(-ENOMEM);
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audio->card.func.name = "g_audio";
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INIT_LIST_HEAD(&audio->play_queue);
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spin_lock_init(&audio->lock);
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audio->card.func.strings = uac1_strings;
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audio->card.func.bind = f_audio_bind;
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audio->card.func.unbind = f_audio_unbind;
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audio->card.func.set_alt = f_audio_set_alt;
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audio->card.func.setup = f_audio_setup;
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audio->card.func.disable = f_audio_disable;
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audio->card.func.free_func = f_audio_free;
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control_selector_init(audio);
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INIT_WORK(&audio->playback_work, f_audio_playback_work);
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return &audio->card.func;
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}
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DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Bryan Wu");
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#endif
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@ -10,6 +10,7 @@
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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@ -23,6 +24,7 @@
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* This component encapsulates the ALSA devices for USB audio gadget
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*/
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#ifdef USBF_UAC1_INCLUDED
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#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p"
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#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c"
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#define FILE_CONTROL "/dev/snd/controlC0"
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@ -38,7 +40,7 @@ MODULE_PARM_DESC(fn_cap, "Capture PCM device file name");
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static char *fn_cntl = FILE_CONTROL;
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module_param(fn_cntl, charp, S_IRUGO);
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MODULE_PARM_DESC(fn_cntl, "Control device file name");
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#endif
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/*-------------------------------------------------------------------------*/
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/**
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@ -167,7 +169,7 @@ static int playback_default_hw_params(struct gaudio_snd_dev *snd)
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/**
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* Playback audio buffer data by ALSA PCM device
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*/
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static size_t u_audio_playback(struct gaudio *card, void *buf, size_t count)
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size_t u_audio_playback(struct gaudio *card, void *buf, size_t count)
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{
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struct gaudio_snd_dev *snd = &card->playback;
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struct snd_pcm_substream *substream = snd->substream;
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@ -202,12 +204,12 @@ try_again:
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return 0;
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}
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static int u_audio_get_playback_channels(struct gaudio *card)
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int u_audio_get_playback_channels(struct gaudio *card)
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{
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return card->playback.channels;
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}
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static int u_audio_get_playback_rate(struct gaudio *card)
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int u_audio_get_playback_rate(struct gaudio *card)
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{
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return card->playback.rate;
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}
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@ -220,6 +222,15 @@ static int gaudio_open_snd_dev(struct gaudio *card)
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{
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struct snd_pcm_file *pcm_file;
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struct gaudio_snd_dev *snd;
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#ifndef USBF_UAC1_INCLUDED
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struct f_uac1_opts *opts;
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char *fn_play, *fn_cap, *fn_cntl;
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opts = container_of(card->func.fi, struct f_uac1_opts, func_inst);
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fn_play = opts->fn_play;
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fn_cap = opts->fn_cap;
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fn_cntl = opts->fn_cntl;
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#endif
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if (!card)
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return -ENODEV;
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@ -293,7 +304,9 @@ static int gaudio_close_snd_dev(struct gaudio *gau)
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return 0;
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}
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#ifdef USBF_UAC1_INCLUDED
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static struct gaudio *the_card;
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#endif
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/**
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* gaudio_setup - setup ALSA interface and preparing for USB transfer
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*
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@ -301,15 +314,17 @@ static struct gaudio *the_card;
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*
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* Returns negative errno, or zero on success
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*/
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int __init gaudio_setup(struct gaudio *card)
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int gaudio_setup(struct gaudio *card)
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{
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int ret;
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ret = gaudio_open_snd_dev(card);
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if (ret)
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ERROR(card, "we need at least one control device\n");
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#ifdef USBF_UAC1_INCLUDED
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else if (!the_card)
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the_card = card;
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#endif
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return ret;
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@ -320,11 +335,17 @@ int __init gaudio_setup(struct gaudio *card)
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*
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* This is called to free all resources allocated by @gaudio_setup().
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*/
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#ifdef USBF_UAC1_INCLUDED
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void gaudio_cleanup(void)
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#else
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void gaudio_cleanup(struct gaudio *the_card)
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#endif
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{
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if (the_card) {
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gaudio_close_snd_dev(the_card);
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#ifdef USBF_UAC1_INCLUDED
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the_card = NULL;
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#endif
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}
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}
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@ -50,7 +50,27 @@ struct gaudio {
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/* TODO */
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};
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struct f_uac1_opts {
|
||||
struct usb_function_instance func_inst;
|
||||
int req_buf_size;
|
||||
int req_count;
|
||||
int audio_buf_size;
|
||||
char *fn_play;
|
||||
char *fn_cap;
|
||||
char *fn_cntl;
|
||||
bool bound;
|
||||
struct gaudio *card;
|
||||
};
|
||||
|
||||
int gaudio_setup(struct gaudio *card);
|
||||
#ifdef USBF_UAC1_INCLUDED
|
||||
void gaudio_cleanup(void);
|
||||
#else
|
||||
void gaudio_cleanup(struct gaudio *the_card);
|
||||
#endif
|
||||
|
||||
size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
|
||||
int u_audio_get_playback_channels(struct gaudio *card);
|
||||
int u_audio_get_playback_rate(struct gaudio *card);
|
||||
|
||||
#endif /* __U_AUDIO_H */
|
||||
|
||||
@ -80,6 +80,7 @@ static struct usb_function *f_uac2;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_GADGET_UAC1
|
||||
#define USBF_UAC1_INCLUDED
|
||||
#include "u_uac1.h"
|
||||
#include "f_uac1.c"
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user