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path: root/drivers/usb/gadget/function/f_midi2.c
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Diffstat (limited to 'drivers/usb/gadget/function/f_midi2.c')
-rw-r--r--drivers/usb/gadget/function/f_midi2.c154
1 files changed, 120 insertions, 34 deletions
diff --git a/drivers/usb/gadget/function/f_midi2.c b/drivers/usb/gadget/function/f_midi2.c
index ec9ef15abfea..f1c47753e0c1 100644
--- a/drivers/usb/gadget/function/f_midi2.c
+++ b/drivers/usb/gadget/function/f_midi2.c
@@ -84,6 +84,8 @@ struct f_midi2_ep {
struct f_midi2_usb_ep ep_in; /* USB MIDI EP-in */
struct f_midi2_usb_ep ep_out; /* USB MIDI EP-out */
+
+ u8 in_group_to_cable[SNDRV_UMP_MAX_GROUPS]; /* map to cable; 1-based! */
};
/* indices for USB strings */
@@ -95,6 +97,13 @@ enum {
/* 1-based GTB id to string id */
#define gtb_to_str_id(id) (STR_GTB1 + (id) - 1)
+/* mapping from MIDI 1.0 cable to UMP group */
+struct midi1_cable_mapping {
+ struct f_midi2_ep *ep;
+ unsigned char block;
+ unsigned char group;
+};
+
/* operation mode */
enum {
MIDI_OP_MODE_UNSET, /* no altset set yet */
@@ -112,10 +121,17 @@ struct f_midi2 {
struct f_midi2_usb_ep midi1_ep_in;
struct f_midi2_usb_ep midi1_ep_out;
+ /* number of MIDI 1.0 I/O cables */
+ unsigned int num_midi1_in;
+ unsigned int num_midi1_out;
+
/* conversion for MIDI 1.0 EP-in */
struct f_midi2_midi1_port midi1_port[MAX_CABLES];
/* conversion for MIDI 1.0 EP-out */
struct ump_cvt_to_ump midi1_ump_cvt;
+ /* mapping between cables and UMP groups */
+ struct midi1_cable_mapping in_cable_mapping[MAX_CABLES];
+ struct midi1_cable_mapping out_cable_mapping[MAX_CABLES];
int midi_if; /* USB MIDI interface number */
int operation_mode; /* current operation mode */
@@ -917,8 +933,7 @@ static bool process_midi1_pending_buf(struct f_midi2 *midi2,
{
unsigned int cable, c;
- for (cable = 0; cable < midi2->midi2_eps[0].blks[0].info.num_groups;
- cable++) {
+ for (cable = 0; cable < midi2->num_midi1_in; cable++) {
struct f_midi2_midi1_port *port = &midi2->midi1_port[cable];
if (!port->pending)
@@ -960,8 +975,8 @@ static void process_midi1_transmit(struct f_midi2 *midi2)
struct usb_request *req = NULL;
/* 12 is the largest outcome (4 MIDI1 cmds) for a single UMP packet */
unsigned char outbuf[12];
- unsigned char group;
- int len, size, cable;
+ unsigned char group, cable;
+ int len, size;
u32 ump;
if (!usb_ep->usb_ep || !usb_ep->usb_ep->enabled)
@@ -986,9 +1001,10 @@ static void process_midi1_transmit(struct f_midi2 *midi2)
&group);
if (size <= 0)
continue;
- cable = group - ep->blks[0].info.first_group;
- if (cable < 0 || cable >= ep->blks[0].info.num_groups)
+ cable = ep->in_group_to_cable[group];
+ if (!cable)
continue;
+ cable--; /* to 0-base */
fill_midi1_pending_buf(midi2, cable, outbuf, size);
}
@@ -1025,12 +1041,12 @@ static void f_midi2_midi1_ep_out_complete(struct usb_ep *usb_ep,
{
struct f_midi2_req_ctx *ctx = req->context;
struct f_midi2 *midi2 = ctx->usb_ep->card;
- struct f_midi2_ep *ep = &midi2->midi2_eps[0];
+ struct f_midi2_ep *ep;
struct ump_cvt_to_ump *cvt = &midi2->midi1_ump_cvt;
static const u8 midi1_packet_bytes[16] = {
0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
};
- unsigned int group, bytes, c, len;
+ unsigned int group, cable, bytes, c, len;
int status = req->status;
const u8 *buf = req->buf;
@@ -1042,10 +1058,11 @@ static void f_midi2_midi1_ep_out_complete(struct usb_ep *usb_ep,
len = req->actual >> 2;
for (; len; len--, buf += 4) {
- group = *buf >> 4;
- if (group >= ep->blks[0].info.num_groups)
+ cable = *buf >> 4;
+ ep = midi2->out_cable_mapping[cable].ep;
+ if (!ep)
continue;
- group += ep->blks[0].info.first_group;
+ group = midi2->out_cable_mapping[cable].group;
bytes = midi1_packet_bytes[*buf & 0x0f];
for (c = 0; c < bytes; c++) {
snd_ump_convert_to_ump(cvt, group, ep->info.protocol,
@@ -1641,6 +1658,7 @@ static int append_configs(struct f_midi2_usb_config *config, void **d)
static int append_midi1_in_jack(struct f_midi2 *midi2,
struct f_midi2_usb_config *config,
+ struct midi1_cable_mapping *map,
unsigned int type)
{
struct usb_midi_in_jack_descriptor *jack =
@@ -1653,7 +1671,9 @@ static int append_midi1_in_jack(struct f_midi2 *midi2,
jack->bDescriptorSubtype = USB_MS_MIDI_IN_JACK;
jack->bJackType = type;
jack->bJackID = id;
- jack->iJack = midi2->strings[STR_GTB1].id; // TODO: better names?
+ /* use the corresponding block name as jack name */
+ if (map->ep)
+ jack->iJack = map->ep->blks[map->block].string_id;
err = append_config(config, jack);
if (err < 0)
@@ -1663,6 +1683,7 @@ static int append_midi1_in_jack(struct f_midi2 *midi2,
static int append_midi1_out_jack(struct f_midi2 *midi2,
struct f_midi2_usb_config *config,
+ struct midi1_cable_mapping *map,
unsigned int type, unsigned int source)
{
struct usb_midi_out_jack_descriptor_1 *jack =
@@ -1678,7 +1699,9 @@ static int append_midi1_out_jack(struct f_midi2 *midi2,
jack->bNrInputPins = 1;
jack->pins[0].baSourceID = source;
jack->pins[0].baSourcePin = 0x01;
- jack->iJack = midi2->strings[STR_GTB1].id; // TODO: better names?
+ /* use the corresponding block name as jack name */
+ if (map->ep)
+ jack->iJack = map->ep->blks[map->block].string_id;
err = append_config(config, jack);
if (err < 0)
@@ -1690,7 +1713,6 @@ static int f_midi2_create_usb_configs(struct f_midi2 *midi2,
struct f_midi2_usb_config *config,
int speed)
{
- struct f_midi2_block *blk = &midi2->midi2_eps[0].blks[0];
void **midi1_in_eps, **midi1_out_eps;
int i, jack, total;
int err;
@@ -1724,56 +1746,55 @@ static int f_midi2_create_usb_configs(struct f_midi2 *midi2,
if (err < 0)
return err;
- switch (blk->info.direction) {
- case SNDRV_UMP_DIR_INPUT:
- case SNDRV_UMP_DIR_OUTPUT:
- midi2_midi1_if_desc.bNumEndpoints = 1;
- break;
- default:
+ if (midi2->num_midi1_in && midi2->num_midi1_out)
midi2_midi1_if_desc.bNumEndpoints = 2;
- break;
- }
+ else
+ midi2_midi1_if_desc.bNumEndpoints = 1;
err = append_configs(config, midi2_midi1_descs);
if (err < 0)
return err;
total = USB_DT_MS_HEADER_SIZE;
- if (blk->info.direction != SNDRV_UMP_DIR_INPUT) {
+ if (midi2->num_midi1_out) {
midi2_midi1_ep_out_class_desc.bLength =
- USB_DT_MS_ENDPOINT_SIZE(blk->info.num_groups);
+ USB_DT_MS_ENDPOINT_SIZE(midi2->num_midi1_out);
total += midi2_midi1_ep_out_class_desc.bLength;
midi2_midi1_ep_out_class_desc.bNumEmbMIDIJack =
- blk->info.num_groups;
- total += blk->info.num_groups *
+ midi2->num_midi1_out;
+ total += midi2->num_midi1_out *
(USB_DT_MIDI_IN_SIZE + USB_DT_MIDI_OUT_SIZE(1));
- for (i = 0; i < blk->info.num_groups; i++) {
+ for (i = 0; i < midi2->num_midi1_out; i++) {
jack = append_midi1_in_jack(midi2, config,
+ &midi2->in_cable_mapping[i],
USB_MS_EMBEDDED);
if (jack < 0)
return jack;
midi2_midi1_ep_out_class_desc.baAssocJackID[i] = jack;
jack = append_midi1_out_jack(midi2, config,
+ &midi2->in_cable_mapping[i],
USB_MS_EXTERNAL, jack);
if (jack < 0)
return jack;
}
}
- if (blk->info.direction != SNDRV_UMP_DIR_OUTPUT) {
+ if (midi2->num_midi1_in) {
midi2_midi1_ep_in_class_desc.bLength =
- USB_DT_MS_ENDPOINT_SIZE(blk->info.num_groups);
+ USB_DT_MS_ENDPOINT_SIZE(midi2->num_midi1_in);
total += midi2_midi1_ep_in_class_desc.bLength;
midi2_midi1_ep_in_class_desc.bNumEmbMIDIJack =
- blk->info.num_groups;
- total += blk->info.num_groups *
+ midi2->num_midi1_in;
+ total += midi2->num_midi1_in *
(USB_DT_MIDI_IN_SIZE + USB_DT_MIDI_OUT_SIZE(1));
- for (i = 0; i < blk->info.num_groups; i++) {
+ for (i = 0; i < midi2->num_midi1_in; i++) {
jack = append_midi1_in_jack(midi2, config,
+ &midi2->out_cable_mapping[i],
USB_MS_EXTERNAL);
if (jack < 0)
return jack;
jack = append_midi1_out_jack(midi2, config,
+ &midi2->out_cable_mapping[i],
USB_MS_EMBEDDED, jack);
if (jack < 0)
return jack;
@@ -1783,12 +1804,12 @@ static int f_midi2_create_usb_configs(struct f_midi2 *midi2,
midi2_midi1_class_desc.wTotalLength = cpu_to_le16(total);
- if (blk->info.direction != SNDRV_UMP_DIR_INPUT) {
+ if (midi2->num_midi1_out) {
err = append_configs(config, midi1_out_eps);
if (err < 0)
return err;
}
- if (blk->info.direction != SNDRV_UMP_DIR_OUTPUT) {
+ if (midi2->num_midi1_in) {
err = append_configs(config, midi1_in_eps);
if (err < 0)
return err;
@@ -2236,6 +2257,8 @@ CONFIGFS_ATTR(f_midi2_block_opts_, name)
F_MIDI2_BLOCK_OPT(direction, "0x%x", 1, 3);
F_MIDI2_BLOCK_OPT(first_group, "0x%x", 0, 15);
F_MIDI2_BLOCK_OPT(num_groups, "0x%x", 1, 16);
+F_MIDI2_BLOCK_OPT(midi1_first_group, "0x%x", 0, 15);
+F_MIDI2_BLOCK_OPT(midi1_num_groups, "0x%x", 0, 16);
F_MIDI2_BLOCK_OPT(ui_hint, "0x%x", 0, 3);
F_MIDI2_BLOCK_OPT(midi_ci_version, "%u", 0, 1);
F_MIDI2_BLOCK_OPT(sysex8_streams, "%u", 0, 255);
@@ -2265,6 +2288,8 @@ static struct configfs_attribute *f_midi2_block_attrs[] = {
&f_midi2_block_opts_attr_direction,
&f_midi2_block_opts_attr_first_group,
&f_midi2_block_opts_attr_num_groups,
+ &f_midi2_block_opts_attr_midi1_first_group,
+ &f_midi2_block_opts_attr_midi1_num_groups,
&f_midi2_block_opts_attr_ui_hint,
&f_midi2_block_opts_attr_midi_ci_version,
&f_midi2_block_opts_attr_sysex8_streams,
@@ -2644,6 +2669,9 @@ static struct usb_function_instance *f_midi2_alloc_inst(void)
return ERR_PTR(ret);
}
+ /* set up the default MIDI1 (that is mandatory) */
+ block_opts->info.midi1_num_groups = 1;
+
config_group_init_type_name(&opts->func_inst.group, "",
&f_midi2_func_type);
@@ -2707,6 +2735,16 @@ static int verify_parameters(struct f_midi2_opts *opts)
i, j);
return -EINVAL;
}
+
+ if (bp->midi1_num_groups) {
+ if (bp->midi1_first_group < bp->first_group ||
+ bp->midi1_first_group + bp->midi1_num_groups >
+ bp->first_group + bp->num_groups) {
+ pr_err("f_midi2: Invalid MIDI1 group definitions for block %d:%d\n",
+ i, j);
+ return -EINVAL;
+ }
+ }
}
}
if (!num_blks) {
@@ -2717,6 +2755,46 @@ static int verify_parameters(struct f_midi2_opts *opts)
return num_eps;
}
+/* fill mapping between MIDI 1.0 cable and UMP EP/group */
+static void fill_midi1_cable_mapping(struct f_midi2 *midi2,
+ struct f_midi2_ep *ep,
+ int blk)
+{
+ const struct f_midi2_block_info *binfo = &ep->blks[blk].info;
+ struct midi1_cable_mapping *map;
+ int i, group;
+
+ if (!binfo->midi1_num_groups)
+ return;
+ if (binfo->direction != SNDRV_UMP_DIR_OUTPUT) {
+ group = binfo->midi1_first_group;
+ map = midi2->in_cable_mapping + midi2->num_midi1_in;
+ for (i = 0; i < binfo->midi1_num_groups; i++, group++, map++) {
+ if (midi2->num_midi1_in >= MAX_CABLES)
+ break;
+ map->ep = ep;
+ map->block = blk;
+ map->group = group;
+ midi2->num_midi1_in++;
+ /* store 1-based cable number */
+ ep->in_group_to_cable[group] = midi2->num_midi1_in;
+ }
+ }
+
+ if (binfo->direction != SNDRV_UMP_DIR_INPUT) {
+ group = binfo->midi1_first_group;
+ map = midi2->out_cable_mapping + midi2->num_midi1_out;
+ for (i = 0; i < binfo->midi1_num_groups; i++, group++, map++) {
+ if (midi2->num_midi1_out >= MAX_CABLES)
+ break;
+ map->ep = ep;
+ map->block = blk;
+ map->group = group;
+ midi2->num_midi1_out++;
+ }
+ }
+}
+
/* gadget alloc callback */
static struct usb_function *f_midi2_alloc(struct usb_function_instance *fi)
{
@@ -2786,9 +2864,17 @@ static struct usb_function *f_midi2_alloc(struct usb_function_instance *fi)
bp = &ep->blks[blk];
midi2->string_defs[gtb_to_str_id(bp->gtb_id)].s =
ump_fb_name(&bp->info);
+
+ fill_midi1_cable_mapping(midi2, ep, blk);
}
}
+ if (!midi2->num_midi1_in && !midi2->num_midi1_out) {
+ pr_err("f_midi2: MIDI1 definition is missing\n");
+ do_f_midi2_free(midi2, opts);
+ return ERR_PTR(-EINVAL);
+ }
+
return &midi2->func;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 20:50:24 +0100