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path: root/drivers/media/usb/em28xx/em28xx-core.c
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Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-core.c')
-rw-r--r--drivers/media/usb/em28xx/em28xx-core.c296
1 files changed, 177 insertions, 119 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c
index bed07a6c33f8..aaedd11791f2 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -5,6 +5,7 @@
Markus Rechberger <mrechberger@gmail.com>
Mauro Carvalho Chehab <mchehab@infradead.org>
Sascha Sommer <saschasommer@freenet.de>
+ Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -76,7 +77,7 @@ int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
int ret;
int pipe = usb_rcvctrlpipe(dev->udev, 0);
- if (dev->state & DEV_DISCONNECTED)
+ if (dev->disconnected)
return -ENODEV;
if (len > URB_MAX_CTRL_SIZE)
@@ -100,7 +101,7 @@ int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
if (reg_debug)
printk(" failed!\n");
mutex_unlock(&dev->ctrl_urb_lock);
- return ret;
+ return usb_translate_errors(ret);
}
if (len)
@@ -152,7 +153,7 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
int ret;
int pipe = usb_sndctrlpipe(dev->udev, 0);
- if (dev->state & DEV_DISCONNECTED)
+ if (dev->disconnected)
return -ENODEV;
if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
@@ -181,6 +182,9 @@ int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
0x0000, reg, dev->urb_buf, len, HZ);
mutex_unlock(&dev->ctrl_urb_lock);
+ if (ret < 0)
+ return usb_translate_errors(ret);
+
if (dev->wait_after_write)
msleep(dev->wait_after_write);
@@ -729,22 +733,24 @@ static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
}
-static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
+static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
u16 width, u16 height)
{
- u8 cwidth = width;
- u8 cheight = height;
- u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01);
+ u8 cwidth = width >> 2;
+ u8 cheight = height >> 2;
+ u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
+ /* NOTE: size limit: 2047x1023 = 2MPix */
- em28xx_coredbg("em28xx Area Set: (%d,%d)\n",
- (width | (overflow & 2) << 7),
- (height | (overflow & 1) << 8));
+ em28xx_coredbg("capture area set to (%d,%d): %dx%d\n",
+ hstart, vstart,
+ ((overflow & 2) << 9 | cwidth << 2),
+ ((overflow & 1) << 10 | cheight << 2));
em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
- return em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
+ em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);
}
static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
@@ -797,28 +803,30 @@ int em28xx_resolution_set(struct em28xx *dev)
it out, we end up with the same format as the rest of the VBI
region */
if (em28xx_vbi_supported(dev) == 1)
- em28xx_capture_area_set(dev, 0, 2, width >> 2, height >> 2);
+ em28xx_capture_area_set(dev, 0, 2, width, height);
else
- em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2);
+ em28xx_capture_area_set(dev, 0, 0, width, height);
return em28xx_scaler_set(dev, dev->hscale, dev->vscale);
}
+/* Set USB alternate setting for analog video */
int em28xx_set_alternate(struct em28xx *dev)
{
- int errCode, prev_alt = dev->alt;
+ int errCode;
int i;
unsigned int min_pkt_size = dev->width * 2 + 4;
- /*
- * alt = 0 is used only for control messages, so, only values
- * greater than 0 can be used for streaming.
- */
- if (alt && alt < dev->num_alt) {
+ /* NOTE: for isoc transfers, only alt settings > 0 are allowed
+ bulk transfers seem to work only with alt=0 ! */
+ dev->alt = 0;
+ if ((alt > 0) && (alt < dev->num_alt)) {
em28xx_coredbg("alternate forced to %d\n", dev->alt);
dev->alt = alt;
goto set_alt;
}
+ if (dev->analog_xfer_bulk)
+ goto set_alt;
/* When image size is bigger than a certain value,
the frame size should be increased, otherwise, only
@@ -829,30 +837,38 @@ int em28xx_set_alternate(struct em28xx *dev)
for (i = 0; i < dev->num_alt; i++) {
/* stop when the selected alt setting offers enough bandwidth */
- if (dev->alt_max_pkt_size[i] >= min_pkt_size) {
+ if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
dev->alt = i;
break;
/* otherwise make sure that we end up with the maximum bandwidth
because the min_pkt_size equation might be wrong...
*/
- } else if (dev->alt_max_pkt_size[i] >
- dev->alt_max_pkt_size[dev->alt])
+ } else if (dev->alt_max_pkt_size_isoc[i] >
+ dev->alt_max_pkt_size_isoc[dev->alt])
dev->alt = i;
}
set_alt:
- if (dev->alt != prev_alt) {
+ /* NOTE: for bulk transfers, we need to call usb_set_interface()
+ * even if the previous settings were the same. Otherwise streaming
+ * fails with all urbs having status = -EOVERFLOW ! */
+ if (dev->analog_xfer_bulk) {
+ dev->max_pkt_size = 512; /* USB 2.0 spec */
+ dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
+ } else { /* isoc */
em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
- min_pkt_size, dev->alt);
- dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt];
- em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
- dev->alt, dev->max_pkt_size);
- errCode = usb_set_interface(dev->udev, 0, dev->alt);
- if (errCode < 0) {
- em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
- dev->alt, errCode);
- return errCode;
- }
+ min_pkt_size, dev->alt);
+ dev->max_pkt_size =
+ dev->alt_max_pkt_size_isoc[dev->alt];
+ dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
+ }
+ em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
+ dev->alt, dev->max_pkt_size);
+ errCode = usb_set_interface(dev->udev, 0, dev->alt);
+ if (errCode < 0) {
+ em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
+ dev->alt, errCode);
+ return errCode;
}
return 0;
}
@@ -919,7 +935,7 @@ EXPORT_SYMBOL_GPL(em28xx_set_mode);
------------------------------------------------------------------*/
/*
- * IRQ callback, called by URB callback
+ * URB completion handler for isoc/bulk transfers
*/
static void em28xx_irq_callback(struct urb *urb)
{
@@ -941,11 +957,12 @@ static void em28xx_irq_callback(struct urb *urb)
/* Copy data from URB */
spin_lock(&dev->slock);
- dev->isoc_ctl.isoc_copy(dev, urb);
+ dev->usb_ctl.urb_data_copy(dev, urb);
spin_unlock(&dev->slock);
/* Reset urb buffers */
for (i = 0; i < urb->number_of_packets; i++) {
+ /* isoc only (bulk: number_of_packets = 0) */
urb->iso_frame_desc[i].status = 0;
urb->iso_frame_desc[i].actual_length = 0;
}
@@ -961,49 +978,50 @@ static void em28xx_irq_callback(struct urb *urb)
/*
* Stop and Deallocate URBs
*/
-void em28xx_uninit_isoc(struct em28xx *dev, enum em28xx_mode mode)
+void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode)
{
struct urb *urb;
- struct em28xx_usb_isoc_bufs *isoc_bufs;
+ struct em28xx_usb_bufs *usb_bufs;
int i;
- em28xx_isocdbg("em28xx: called em28xx_uninit_isoc in mode %d\n", mode);
+ em28xx_isocdbg("em28xx: called em28xx_uninit_usb_xfer in mode %d\n",
+ mode);
if (mode == EM28XX_DIGITAL_MODE)
- isoc_bufs = &dev->isoc_ctl.digital_bufs;
+ usb_bufs = &dev->usb_ctl.digital_bufs;
else
- isoc_bufs = &dev->isoc_ctl.analog_bufs;
+ usb_bufs = &dev->usb_ctl.analog_bufs;
- for (i = 0; i < isoc_bufs->num_bufs; i++) {
- urb = isoc_bufs->urb[i];
+ for (i = 0; i < usb_bufs->num_bufs; i++) {
+ urb = usb_bufs->urb[i];
if (urb) {
if (!irqs_disabled())
usb_kill_urb(urb);
else
usb_unlink_urb(urb);
- if (isoc_bufs->transfer_buffer[i]) {
+ if (usb_bufs->transfer_buffer[i]) {
usb_free_coherent(dev->udev,
urb->transfer_buffer_length,
- isoc_bufs->transfer_buffer[i],
+ usb_bufs->transfer_buffer[i],
urb->transfer_dma);
}
usb_free_urb(urb);
- isoc_bufs->urb[i] = NULL;
+ usb_bufs->urb[i] = NULL;
}
- isoc_bufs->transfer_buffer[i] = NULL;
+ usb_bufs->transfer_buffer[i] = NULL;
}
- kfree(isoc_bufs->urb);
- kfree(isoc_bufs->transfer_buffer);
+ kfree(usb_bufs->urb);
+ kfree(usb_bufs->transfer_buffer);
- isoc_bufs->urb = NULL;
- isoc_bufs->transfer_buffer = NULL;
- isoc_bufs->num_bufs = 0;
+ usb_bufs->urb = NULL;
+ usb_bufs->transfer_buffer = NULL;
+ usb_bufs->num_bufs = 0;
em28xx_capture_start(dev, 0);
}
-EXPORT_SYMBOL_GPL(em28xx_uninit_isoc);
+EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer);
/*
* Stop URBs
@@ -1012,7 +1030,7 @@ void em28xx_stop_urbs(struct em28xx *dev)
{
int i;
struct urb *urb;
- struct em28xx_usb_isoc_bufs *isoc_bufs = &dev->isoc_ctl.digital_bufs;
+ struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs;
em28xx_isocdbg("em28xx: called em28xx_stop_urbs\n");
@@ -1033,10 +1051,10 @@ EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
/*
* Allocate URBs
*/
-int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
- int max_packets, int num_bufs, int max_pkt_size)
+int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
+ int num_bufs, int max_pkt_size, int packet_multiplier)
{
- struct em28xx_usb_isoc_bufs *isoc_bufs;
+ struct em28xx_usb_bufs *usb_bufs;
int i;
int sb_size, pipe;
struct urb *urb;
@@ -1044,140 +1062,180 @@ int em28xx_alloc_isoc(struct em28xx *dev, enum em28xx_mode mode,
em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
- if (mode == EM28XX_DIGITAL_MODE)
- isoc_bufs = &dev->isoc_ctl.digital_bufs;
- else
- isoc_bufs = &dev->isoc_ctl.analog_bufs;
+ /* Check mode and if we have an endpoint for the selected
+ transfer type, select buffer */
+ if (mode == EM28XX_DIGITAL_MODE) {
+ if ((xfer_bulk && !dev->dvb_ep_bulk) ||
+ (!xfer_bulk && !dev->dvb_ep_isoc)) {
+ em28xx_errdev("no endpoint for DVB mode and transfer type %d\n",
+ xfer_bulk > 0);
+ return -EINVAL;
+ }
+ usb_bufs = &dev->usb_ctl.digital_bufs;
+ } else if (mode == EM28XX_ANALOG_MODE) {
+ if ((xfer_bulk && !dev->analog_ep_bulk) ||
+ (!xfer_bulk && !dev->analog_ep_isoc)) {
+ em28xx_errdev("no endpoint for analog mode and transfer type %d\n",
+ xfer_bulk > 0);
+ return -EINVAL;
+ }
+ usb_bufs = &dev->usb_ctl.analog_bufs;
+ } else {
+ em28xx_errdev("invalid mode selected\n");
+ return -EINVAL;
+ }
/* De-allocates all pending stuff */
- em28xx_uninit_isoc(dev, mode);
+ em28xx_uninit_usb_xfer(dev, mode);
- isoc_bufs->num_bufs = num_bufs;
+ usb_bufs->num_bufs = num_bufs;
- isoc_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
- if (!isoc_bufs->urb) {
+ usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
+ if (!usb_bufs->urb) {
em28xx_errdev("cannot alloc memory for usb buffers\n");
return -ENOMEM;
}
- isoc_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
+ usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
- if (!isoc_bufs->transfer_buffer) {
+ if (!usb_bufs->transfer_buffer) {
em28xx_errdev("cannot allocate memory for usb transfer\n");
- kfree(isoc_bufs->urb);
+ kfree(usb_bufs->urb);
return -ENOMEM;
}
- isoc_bufs->max_pkt_size = max_pkt_size;
- isoc_bufs->num_packets = max_packets;
- dev->isoc_ctl.vid_buf = NULL;
- dev->isoc_ctl.vbi_buf = NULL;
+ usb_bufs->max_pkt_size = max_pkt_size;
+ if (xfer_bulk)
+ usb_bufs->num_packets = 0;
+ else
+ usb_bufs->num_packets = packet_multiplier;
+ dev->usb_ctl.vid_buf = NULL;
+ dev->usb_ctl.vbi_buf = NULL;
- sb_size = isoc_bufs->num_packets * isoc_bufs->max_pkt_size;
+ sb_size = packet_multiplier * usb_bufs->max_pkt_size;
/* allocate urbs and transfer buffers */
- for (i = 0; i < isoc_bufs->num_bufs; i++) {
- urb = usb_alloc_urb(isoc_bufs->num_packets, GFP_KERNEL);
+ for (i = 0; i < usb_bufs->num_bufs; i++) {
+ urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
if (!urb) {
- em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
- em28xx_uninit_isoc(dev, mode);
+ em28xx_err("cannot alloc usb_ctl.urb %i\n", i);
+ em28xx_uninit_usb_xfer(dev, mode);
return -ENOMEM;
}
- isoc_bufs->urb[i] = urb;
+ usb_bufs->urb[i] = urb;
- isoc_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
+ usb_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
sb_size, GFP_KERNEL, &urb->transfer_dma);
- if (!isoc_bufs->transfer_buffer[i]) {
+ if (!usb_bufs->transfer_buffer[i]) {
em28xx_err("unable to allocate %i bytes for transfer"
" buffer %i%s\n",
sb_size, i,
in_interrupt() ? " while in int" : "");
- em28xx_uninit_isoc(dev, mode);
+ em28xx_uninit_usb_xfer(dev, mode);
return -ENOMEM;
}
- memset(isoc_bufs->transfer_buffer[i], 0, sb_size);
-
- /* FIXME: this is a hack - should be
- 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
- should also be using 'desc.bInterval'
- */
- pipe = usb_rcvisocpipe(dev->udev,
- mode == EM28XX_ANALOG_MODE ?
- EM28XX_EP_ANALOG : EM28XX_EP_DIGITAL);
-
- usb_fill_int_urb(urb, dev->udev, pipe,
- isoc_bufs->transfer_buffer[i], sb_size,
- em28xx_irq_callback, dev, 1);
-
- urb->number_of_packets = isoc_bufs->num_packets;
- urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
-
- k = 0;
- for (j = 0; j < isoc_bufs->num_packets; j++) {
- urb->iso_frame_desc[j].offset = k;
- urb->iso_frame_desc[j].length =
- isoc_bufs->max_pkt_size;
- k += isoc_bufs->max_pkt_size;
+ memset(usb_bufs->transfer_buffer[i], 0, sb_size);
+
+ if (xfer_bulk) { /* bulk */
+ pipe = usb_rcvbulkpipe(dev->udev,
+ mode == EM28XX_ANALOG_MODE ?
+ dev->analog_ep_bulk :
+ dev->dvb_ep_bulk);
+ usb_fill_bulk_urb(urb, dev->udev, pipe,
+ usb_bufs->transfer_buffer[i], sb_size,
+ em28xx_irq_callback, dev);
+ urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ } else { /* isoc */
+ pipe = usb_rcvisocpipe(dev->udev,
+ mode == EM28XX_ANALOG_MODE ?
+ dev->analog_ep_isoc :
+ dev->dvb_ep_isoc);
+ usb_fill_int_urb(urb, dev->udev, pipe,
+ usb_bufs->transfer_buffer[i], sb_size,
+ em28xx_irq_callback, dev, 1);
+ urb->transfer_flags = URB_ISO_ASAP |
+ URB_NO_TRANSFER_DMA_MAP;
+ k = 0;
+ for (j = 0; j < usb_bufs->num_packets; j++) {
+ urb->iso_frame_desc[j].offset = k;
+ urb->iso_frame_desc[j].length =
+ usb_bufs->max_pkt_size;
+ k += usb_bufs->max_pkt_size;
+ }
}
+
+ urb->number_of_packets = usb_bufs->num_packets;
}
return 0;
}
-EXPORT_SYMBOL_GPL(em28xx_alloc_isoc);
+EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
/*
* Allocate URBs and start IRQ
*/
-int em28xx_init_isoc(struct em28xx *dev, enum em28xx_mode mode,
- int max_packets, int num_bufs, int max_pkt_size,
- int (*isoc_copy) (struct em28xx *dev, struct urb *urb))
+int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
+ int xfer_bulk, int num_bufs, int max_pkt_size,
+ int packet_multiplier,
+ int (*urb_data_copy) (struct em28xx *dev, struct urb *urb))
{
struct em28xx_dmaqueue *dma_q = &dev->vidq;
struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
- struct em28xx_usb_isoc_bufs *isoc_bufs;
+ struct em28xx_usb_bufs *usb_bufs;
int i;
int rc;
int alloc;
- em28xx_isocdbg("em28xx: called em28xx_init_isoc in mode %d\n", mode);
+ em28xx_isocdbg("em28xx: called em28xx_init_usb_xfer in mode %d\n",
+ mode);
- dev->isoc_ctl.isoc_copy = isoc_copy;
+ dev->usb_ctl.urb_data_copy = urb_data_copy;
if (mode == EM28XX_DIGITAL_MODE) {
- isoc_bufs = &dev->isoc_ctl.digital_bufs;
- /* no need to free/alloc isoc buffers in digital mode */
+ usb_bufs = &dev->usb_ctl.digital_bufs;
+ /* no need to free/alloc usb buffers in digital mode */
alloc = 0;
} else {
- isoc_bufs = &dev->isoc_ctl.analog_bufs;
+ usb_bufs = &dev->usb_ctl.analog_bufs;
alloc = 1;
}
if (alloc) {
- rc = em28xx_alloc_isoc(dev, mode, max_packets,
- num_bufs, max_pkt_size);
+ rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs,
+ max_pkt_size, packet_multiplier);
if (rc)
return rc;
}
+ if (xfer_bulk) {
+ rc = usb_clear_halt(dev->udev, usb_bufs->urb[0]->pipe);
+ if (rc < 0) {
+ em28xx_err("failed to clear USB bulk endpoint stall/halt condition (error=%i)\n",
+ rc);
+ em28xx_uninit_usb_xfer(dev, mode);
+ return rc;
+ }
+ }
+
init_waitqueue_head(&dma_q->wq);
init_waitqueue_head(&vbi_dma_q->wq);
em28xx_capture_start(dev, 1);
/* submit urbs and enables IRQ */
- for (i = 0; i < isoc_bufs->num_bufs; i++) {
- rc = usb_submit_urb(isoc_bufs->urb[i], GFP_ATOMIC);
+ for (i = 0; i < usb_bufs->num_bufs; i++) {
+ rc = usb_submit_urb(usb_bufs->urb[i], GFP_ATOMIC);
if (rc) {
em28xx_err("submit of urb %i failed (error=%i)\n", i,
rc);
- em28xx_uninit_isoc(dev, mode);
+ em28xx_uninit_usb_xfer(dev, mode);
return rc;
}
}
return 0;
}
-EXPORT_SYMBOL_GPL(em28xx_init_isoc);
+EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer);
/*
* em28xx_wake_i2c()
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.