linux-yocto - Yocto Linux Embedded kernel

Age	Commit message (Expand)	Author
2020-03-17	net: bridge: vlan options: add support for tunnel mapping set/del	Nikolay Aleksandrov
2020-03-17	net: bridge: vlan options: add support for tunnel id dumping	Nikolay Aleksandrov
2020-03-17	net: bridge: vlan tunnel: constify bridge and port arguments	Nikolay Aleksandrov
2019-05-30	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	Thomas Gleixner
2019-04-27	netlink: make validation more configurable for future strictness	Johannes Berg
2019-04-27	netlink: make nla_nest_start() add NLA_F_NESTED flag	Michal Kubecek
2017-10-29	bridge: netlink: make setlink/dellink notifications more accurate	Nikolay Aleksandrov
2017-04-13	netlink: pass extended ACK struct to parsing functions	Johannes Berg
2017-02-08	bridge: vlan tunnel id info range fill size calc cleanups	Roopa Prabhu
2017-02-07	bridge: remove unnecessary check for vtbegin in br_fill_vlan_tinfo_range	Roopa Prabhu
2017-02-07	bridge: tunnel: fix attribute checks in br_parse_vlan_tunnel_info	Nikolay Aleksandrov
2017-02-03	bridge: per vlan dst_metadata netlink support	Roopa Prabhu

// SPDX-License-Identifier: GPL-2.0-or-later /* * Clock domain and sample rate management functions */ #include <linux/bitops.h> #include <linux/init.h> #include <linux/string.h> #include <linux/usb.h> #include <linux/usb/audio.h> #include <linux/usb/audio-v2.h> #include <linux/usb/audio-v3.h> #include <sound/core.h> #include <sound/info.h> #include <sound/pcm.h> #include "usbaudio.h" #include "card.h" #include "helper.h" #include "clock.h" #include "quirks.h" static void *find_uac_clock_desc(struct usb_host_interface *iface, int id, bool (*validator)(void *, int), u8 type) { void *cs = NULL; while ((cs = snd_usb_find_csint_desc(iface->extra, iface->extralen, cs, type))) { if (validator(cs, id)) return cs; } return NULL; } static bool validate_clock_source_v2(void *p, int id) { struct uac_clock_source_descriptor *cs = p; return cs->bClockID == id; } static bool validate_clock_source_v3(void *p, int id) { struct uac3_clock_source_descriptor *cs = p; return cs->bClockID == id; } static bool validate_clock_selector_v2(void *p, int id) { struct uac_clock_selector_descriptor *cs = p; return cs->bClockID == id; } static bool validate_clock_selector_v3(void *p, int id) { struct uac3_clock_selector_descriptor *cs = p; return cs->bClockID == id; } static bool validate_clock_multiplier_v2(void *p, int id) { struct uac_clock_multiplier_descriptor *cs = p; return cs->bClockID == id; } static bool validate_clock_multiplier_v3(void *p, int id) { struct uac3_clock_multiplier_descriptor *cs = p; return cs->bClockID == id; } #define DEFINE_FIND_HELPER(name, obj, validator, type) \ static obj *name(struct usb_host_interface *iface, int id) \ { \ return find_uac_clock_desc(iface, id, validator, type); \ } DEFINE_FIND_HELPER(snd_usb_find_clock_source, struct uac_clock_source_descriptor, validate_clock_source_v2, UAC2_CLOCK_SOURCE); DEFINE_FIND_HELPER(snd_usb_find_clock_source_v3, struct uac3_clock_source_descriptor, validate_clock_source_v3, UAC3_CLOCK_SOURCE); DEFINE_FIND_HELPER(snd_usb_find_clock_selector, struct uac_clock_selector_descriptor, validate_clock_selector_v2, UAC2_CLOCK_SELECTOR); DEFINE_FIND_HELPER(snd_usb_find_clock_selector_v3, struct uac3_clock_selector_descriptor, validate_clock_selector_v3, UAC3_CLOCK_SELECTOR); DEFINE_FIND_HELPER(snd_usb_find_clock_multiplier, struct uac_clock_multiplier_descriptor, validate_clock_multiplier_v2, UAC2_CLOCK_MULTIPLIER); DEFINE_FIND_HELPER(snd_usb_find_clock_multiplier_v3, struct uac3_clock_multiplier_descriptor, validate_clock_multiplier_v3, UAC3_CLOCK_MULTIPLIER); static int uac_clock_selector_get_val(struct snd_usb_audio *chip, int selector_id) { unsigned char buf; int ret; ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, UAC2_CX_CLOCK_SELECTOR << 8, snd_usb_ctrl_intf(chip) | (selector_id << 8), &buf, sizeof(buf)); if (ret < 0) return ret; return buf; } static int uac_clock_selector_set_val(struct snd_usb_audio *chip, int selector_id, unsigned char pin) { int ret; ret = snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0), UAC2_CS_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, UAC2_CX_CLOCK_SELECTOR << 8, snd_usb_ctrl_intf(chip) | (selector_id << 8), &pin, sizeof(pin)); if (ret < 0) return ret; if (ret != sizeof(pin)) { usb_audio_err(chip, "setting selector (id %d) unexpected length %d\n", selector_id, ret); return -EINVAL; } ret = uac_clock_selector_get_val(chip, selector_id); if (ret < 0) return ret; if (ret != pin) { usb_audio_err(chip, "setting selector (id %d) to %x failed (current: %d)\n", selector_id, pin, ret); return -EINVAL; } return ret; } static bool uac_clock_source_is_valid_quirk(struct snd_usb_audio *chip, struct audioformat *fmt, int source_id) { bool ret = false; int count; unsigned char data; struct usb_device *dev = chip->dev; if (fmt->protocol == UAC_VERSION_2) { struct uac_clock_source_descriptor *cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, source_id); if (!cs_desc) return false; /* * Assume the clock is valid if clock source supports only one * single sample rate, the terminal is connected directly to it * (there is no clock selector) and clock type is internal. * This is to deal with some Denon DJ controllers that always * reports that clock is invalid. */ if (fmt->nr_rates == 1 && (fmt->clock & 0xff) == cs_desc->bClockID && (cs_desc->bmAttributes & 0x3) != UAC_CLOCK_SOURCE_TYPE_EXT) return true; } /* * MOTU MicroBook IIc * Sample rate changes takes more than 2 seconds for this device. Clock * validity request returns false during that period. */ if (chip->usb_id == USB_ID(0x07fd, 0x0004)) { count = 0; while ((!ret) && (count < 50)) { int err; msleep(100); err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, UAC2_CS_CONTROL_CLOCK_VALID << 8, snd_usb_ctrl_intf(chip) | (source_id << 8), &data, sizeof(data)); if (err < 0) { dev_warn(&dev->dev, "%s(): cannot get clock validity for id %d\n", __func__, source_id); return false; } ret = !!data; count++; } } return ret; } static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, struct audioformat *fmt, int source_id) { int err; unsigned char data; struct usb_device *dev = chip->dev; u32 bmControls; if (fmt->protocol == UAC_VERSION_3) { struct uac3_clock_source_descriptor *cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, source_id); if (!cs_desc) return false; bmControls = le32_to_cpu(cs_desc->bmControls); } else { /* UAC_VERSION_1/2 */ struct uac_clock_source_descriptor *cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, source_id); if (!cs_desc) return false; bmControls = cs_desc->bmControls; } /* If a clock source can't tell us whether it's valid, we assume it is */ if (!uac_v2v3_control_is_readable(bmControls, UAC2_CS_CONTROL_CLOCK_VALID)) return true; err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, UAC2_CS_CONTROL_CLOCK_VALID << 8, snd_usb_ctrl_intf(chip) | (source_id << 8), &data, sizeof(data)); if (err < 0) { dev_warn(&dev->dev, "%s(): cannot get clock validity for id %d\n", __func__, source_id); return false; } if (data) return true; else return uac_clock_source_is_valid_quirk(chip, fmt, source_id); } static int __uac_clock_find_source(struct snd_usb_audio *chip, struct audioformat *fmt, int entity_id, unsigned long *visited, bool validate) { struct uac_clock_source_descriptor *source; struct uac_clock_selector_descriptor *selector; struct uac_clock_multiplier_descriptor *multiplier; entity_id &= 0xff; if (test_and_set_bit(entity_id, visited)) { usb_audio_warn(chip, "%s(): recursive clock topology detected, id %d.\n", __func__, entity_id); return -EINVAL; } /* first, see if the ID we're looking for is a clock source already */ source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id); if (source) { entity_id = source->bClockID; if (validate && !uac_clock_source_is_valid(chip, fmt, entity_id)) { usb_audio_err(chip, "clock source %d is not valid, cannot use\n", entity_id); return -ENXIO; } return entity_id; } selector = snd_usb_find_clock_selector(chip->ctrl_intf, entity_id); if (selector) { int ret, i, cur; /* the entity ID we are looking for is a selector. * find out what it currently selects */ ret = uac_clock_selector_get_val(chip, selector->bClockID); if (ret < 0) return ret; /* Selector values are one-based */ if (ret > selector->bNrInPins || ret < 1) { usb_audio_err(chip, "%s(): selector reported illegal value, id %d, ret %d\n", __func__, selector->bClockID, ret); return -EINVAL; } cur = ret; ret = __uac_clock_find_source(chip, fmt, selector->baCSourceID[ret - 1], visited, validate); if (!validate || ret > 0 || !chip->autoclock) return ret; /* The current clock source is invalid, try others. */ for (i = 1; i <= selector->bNrInPins; i++) { int err; if (i == cur) continue; ret = __uac_clock_find_source(chip, fmt, selector->baCSourceID[i - 1], visited, true); if (ret < 0) continue; err = uac_clock_selector_set_val(chip, entity_id, i); if (err < 0) continue; usb_audio_info(chip, "found and selected valid clock source %d\n", ret); return ret; } return -ENXIO; } /* FIXME: multipliers only act as pass-thru element for now */ multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id); if (multiplier) return __uac_clock_find_source(chip, fmt, multiplier->bCSourceID, visited, validate); return -EINVAL; } static int __uac3_clock_find_source(struct snd_usb_audio *chip, struct audioformat *fmt, int entity_id, unsigned long *visited, bool validate) { struct uac3_clock_source_descriptor *source; struct uac3_clock_selector_descriptor *selector; struct uac3_clock_multiplier_descriptor *multiplier; entity_id &= 0xff; if (test_and_set_bit(entity_id, visited)) { usb_audio_warn(chip, "%s(): recursive clock topology detected, id %d.\n", __func__, entity_id); return -EINVAL; } /* first, see if the ID we're looking for is a clock source already */ source = snd_usb_find_clock_source_v3(chip->ctrl_intf, entity_id); if (source) { entity_id = source->bClockID; if (validate && !uac_clock_source_is_valid(chip, fmt, entity_id)) { usb_audio_err(chip, "clock source %d is not valid, cannot use\n", entity_id); return -ENXIO; } return entity_id; } selector = snd_usb_find_clock_selector_v3(chip->ctrl_intf, entity_id); if (selector) { int ret, i, cur; /* the entity ID we are looking for is a selector. * find out what it currently selects */ ret = uac_clock_selector_get_val(chip, selector->bClockID); if (ret < 0) return ret; /* Selector values are one-based */ if (ret > selector->bNrInPins || ret < 1) { usb_audio_err(chip, "%s(): selector reported illegal value, id %d, ret %d\n", __func__, selector->bClockID, ret); return -EINVAL; } cur = ret; ret = __uac3_clock_find_source(chip, fmt, selector->baCSourceID[ret - 1], visited, validate); if (!validate || ret > 0 || !chip->autoclock) return ret; /* The current clock source is invalid, try others. */ for (i = 1; i <= selector->bNrInPins; i++) { int err; if (i == cur) continue; ret = __uac3_clock_find_source(chip, fmt, selector->baCSourceID[i - 1], visited, true); if (ret < 0) continue; err = uac_clock_selector_set_val(chip, entity_id, i); if (err < 0) continue; usb_audio_info(chip, "found and selected valid clock source %d\n", ret); return ret; } return -ENXIO; } /* FIXME: multipliers only act as pass-thru element for now */ multiplier = snd_usb_find_clock_multiplier_v3(chip->ctrl_intf, entity_id); if (multiplier) return __uac3_clock_find_source(chip, fmt, multiplier->bCSourceID, visited, validate); return -EINVAL; } /* * For all kinds of sample rate settings and other device queries, * the clock source (end-leaf) must be used. However, clock selectors, * clock multipliers and sample rate converters may be specified as * clock source input to terminal. This functions walks the clock path * to its end and tries to find the source. * * The 'visited' bitfield is used internally to detect recursive loops. * * Returns the clock source UnitID (>=0) on success, or an error. */ int snd_usb_clock_find_source(struct snd_usb_audio *chip, struct audioformat *fmt, bool validate) { DECLARE_BITMAP(visited, 256); memset(visited, 0, sizeof(visited)); switch (fmt->protocol) { case UAC_VERSION_2: return __uac_clock_find_source(chip, fmt, fmt->clock, visited, validate); case UAC_VERSION_3: return __uac3_clock_find_source(chip, fmt, fmt->clock, visited, validate); default: return -EINVAL; } } static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt, int rate) { struct usb_device *dev = chip->dev; unsigned int ep; unsigned char data[3]; int err, crate; if (get_iface_desc(alts)->bNumEndpoints < 1) return -EINVAL; ep = get_endpoint(alts, 0)->bEndpointAddress; /* if endpoint doesn't have sampling rate control, bail out */ if (!(fmt->attributes & UAC_EP_CS_ATTR_SAMPLE_RATE)) return 0; data[0] = rate; data[1] = rate >> 8; data[2] = rate >> 16; err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, sizeof(data)); if (err < 0) { dev_err(&dev->dev, "%d:%d: cannot set freq %d to ep %#x\n", iface, fmt->altsetting, rate, ep); return err; } /* Don't check the sample rate for devices which we know don't * support reading */ if (snd_usb_get_sample_rate_quirk(chip)) return 0; /* the firmware is likely buggy, don't repeat to fail too many times */ if (chip->sample_rate_read_error > 2) return 0; err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR, USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN, UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, sizeof(data)); if (err < 0) { dev_err(&dev->dev, "%d:%d: cannot get freq at ep %#x\n", iface, fmt->altsetting, ep); chip->sample_rate_read_error++; return 0; /* some devices don't support reading */ } crate = data[0] | (data[1] << 8) | (data[2] << 16); if (crate != rate) { dev_warn(&dev->dev, "current rate %d is different from the runtime rate %d\n", crate, rate); // runtime->rate = crate; } return 0; } static int get_sample_rate_v2v3(struct snd_usb_audio *chip, int iface, int altsetting, int clock) { struct usb_device *dev = chip->dev; __le32 data; int err; err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, UAC2_CS_CONTROL_SAM_FREQ << 8, snd_usb_ctrl_intf(chip) | (clock << 8), &data, sizeof(data)); if (err < 0) { dev_warn(&dev->dev, "%d:%d: cannot get freq (v2/v3): err %d\n", iface, altsetting, err); return 0; } return le32_to_cpu(data); } static int set_sample_rate_v2v3(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt, int rate) { struct usb_device *dev = chip->dev; __le32 data; int err, cur_rate, prev_rate; int clock; bool writeable; u32 bmControls; /* First, try to find a valid clock. This may trigger * automatic clock selection if the current clock is not * valid. */ clock = snd_usb_clock_find_source(chip, fmt, true); if (clock < 0) { /* We did not find a valid clock, but that might be * because the current sample rate does not match an * external clock source. Try again without validation * and we will do another validation after setting the * rate. */ clock = snd_usb_clock_find_source(chip, fmt, false); if (clock < 0) return clock; } prev_rate = get_sample_rate_v2v3(chip, iface, fmt->altsetting, clock); if (prev_rate == rate) goto validation; if (fmt->protocol == UAC_VERSION_3) { struct uac3_clock_source_descriptor *cs_desc; cs_desc = snd_usb_find_clock_source_v3(chip->ctrl_intf, clock); bmControls = le32_to_cpu(cs_desc->bmControls); } else { struct uac_clock_source_descriptor *cs_desc; cs_desc = snd_usb_find_clock_source(chip->ctrl_intf, clock); bmControls = cs_desc->bmControls; } writeable = uac_v2v3_control_is_writeable(bmControls, UAC2_CS_CONTROL_SAM_FREQ); if (writeable) { data = cpu_to_le32(rate); err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, UAC2_CS_CONTROL_SAM_FREQ << 8, snd_usb_ctrl_intf(chip) | (clock << 8), &data, sizeof(data)); if (err < 0) { usb_audio_err(chip, "%d:%d: cannot set freq %d (v2/v3): err %d\n", iface, fmt->altsetting, rate, err); return err; } cur_rate = get_sample_rate_v2v3(chip, iface, fmt->altsetting, clock); } else { cur_rate = prev_rate; } if (cur_rate != rate) { if (!writeable) { usb_audio_warn(chip, "%d:%d: freq mismatch (RO clock): req %d, clock runs @%d\n", iface, fmt->altsetting, rate, cur_rate); return -ENXIO; } usb_audio_dbg(chip, "current rate %d is different from the runtime rate %d\n", cur_rate, rate); } /* Some devices doesn't respond to sample rate changes while the * interface is active. */ if (rate != prev_rate) { usb_set_interface(dev, iface, 0); snd_usb_set_interface_quirk(dev); usb_set_interface(dev, iface, fmt->altsetting); snd_usb_set_interface_quirk(dev); } validation: /* validate clock after rate change */ if (!uac_clock_source_is_valid(chip, fmt, clock)) return -ENXIO; return 0; } int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt, int rate) { switch (fmt->protocol) { case UAC_VERSION_1: default: return set_sample_rate_v1(chip, iface, alts, fmt, rate); case UAC_VERSION_3: if (chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) { if (rate != UAC3_BADD_SAMPLING_RATE) return -ENXIO; else return 0; } /* fall through */ case UAC_VERSION_2: return set_sample_rate_v2v3(chip, iface, alts, fmt, rate); } }