/*
 * digi00x-transaction.c - a part of driver for Digidesign Digi 002/003 family
 *
 * Copyright (c) 2014-2015 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include <sound/asound.h>
#include "digi00x.h"

static int fill_midi_message(struct snd_rawmidi_substream *substream, u8 *buf)
{
	int bytes;

	buf[0] = 0x80;
	bytes = snd_rawmidi_transmit_peek(substream, buf + 1, 2);
	if (bytes >= 0)
		buf[3] = 0xc0 | bytes;

	return bytes;
}

static void handle_midi_control(struct snd_dg00x *dg00x, __be32 *buf,
				unsigned int length)
{
	struct snd_rawmidi_substream *substream;
	unsigned int i;
	unsigned int len;
	u8 *b;

	substream = ACCESS_ONCE(dg00x->in_control);
	if (substream == NULL)
		return;

	length /= 4;

	for (i = 0; i < length; i++) {
		b = (u8 *)&buf[i];
		len = b[3] & 0xf;
		if (len > 0)
			snd_rawmidi_receive(dg00x->in_control, b + 1, len);
	}
}

static void handle_unknown_message(struct snd_dg00x *dg00x,
				   unsigned long long offset, __be32 *buf)
{
	unsigned long flags;

	spin_lock_irqsave(&dg00x->lock, flags);
	dg00x->msg = be32_to_cpu(*buf);
	spin_unlock_irqrestore(&dg00x->lock, flags);

	wake_up(&dg00x->hwdep_wait);
}

static void handle_message(struct fw_card *card, struct fw_request *request,
			   int tcode, int destination, int source,
			   int generation, unsigned long long offset,
			   void *data, size_t length, void *callback_data)
{
	struct snd_dg00x *dg00x = callback_data;
	__be32 *buf = (__be32 *)data;

	if (offset == dg00x->async_handler.offset)
		handle_unknown_message(dg00x, offset, buf);
	else if (offset == dg00x->async_handler.offset + 4)
		handle_midi_control(dg00x, buf, length);

	fw_send_response(card, request, RCODE_COMPLETE);
}

int snd_dg00x_transaction_reregister(struct snd_dg00x *dg00x)
{
	struct fw_device *device = fw_parent_device(dg00x->unit);
	__be32 data[2];
	int err;

	/* Unknown. 4bytes. */
	data[0] = cpu_to_be32((device->card->node_id << 16) |
			      (dg00x->async_handler.offset >> 32));
	data[1] = cpu_to_be32(dg00x->async_handler.offset);
	err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST,
				 DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR,
				 &data, sizeof(data), 0);
	if (err < 0)
		return err;

	/* Asynchronous transactions for MIDI control message. */
	data[0] = cpu_to_be32((device->card->node_id << 16) |
			      (dg00x->async_handler.offset >> 32));
	data[1] = cpu_to_be32(dg00x->async_handler.offset + 4);
	return snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST,
				  DG00X_ADDR_BASE + DG00X_OFFSET_MIDI_CTL_ADDR,
				  &data, sizeof(data), 0);
}

int snd_dg00x_transaction_register(struct snd_dg00x *dg00x)
{
	static const struct fw_address_region resp_register_region = {
		.start	= 0xffffe0000000ull,
		.end	= 0xffffe000ffffull,
	};
	int err;

	dg00x->async_handler.length = 12;
	dg00x->async_handler.address_callback = handle_message;
	dg00x->async_handler.callback_data = dg00x;

	err = fw_core_add_address_handler(&dg00x->async_handler,
					  &resp_register_region);
	if (err < 0)
		return err;

	err = snd_dg00x_transaction_reregister(dg00x);
	if (err < 0)
		goto error;

	err = snd_fw_async_midi_port_init(&dg00x->out_control, dg00x->unit,
					  DG00X_ADDR_BASE + DG00X_OFFSET_MMC,
					  4, fill_midi_message);
	if (err < 0)
		goto error;

	return err;
error:
	fw_core_remove_address_handler(&dg00x->async_handler);
	dg00x->async_handler.callback_data = NULL;
	return err;
}

void snd_dg00x_transaction_unregister(struct snd_dg00x *dg00x)
{
	if (dg00x->async_handler.callback_data == NULL)
		return;

	snd_fw_async_midi_port_destroy(&dg00x->out_control);
	fw_core_remove_address_handler(&dg00x->async_handler);

	dg00x->async_handler.callback_data = NULL;
}
 class='left'>Files</th><th class='left'>Lines</th></tr>
alue='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-10-15 09:26:12 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-10-15 09:26:12 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/garmin_gps.c?id=133d970e0dadf7b413db19893acc5b26664bf4a1'>133d970e0dadf7b413db19893acc5b26664bf4a1</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/serial/garmin_gps.c?id=133d970e0dadf7b413db19893acc5b26664bf4a1'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=133d970e0dadf7b413db19893acc5b26664bf4a1'>ea10732ca1d0f663ef1319973947a7c72cf170e7</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial/garmin_gps.c?id=133d970e0dadf7b413db19893acc5b26664bf4a1'>drivers/usb/serial/garmin_gps.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/garmin_gps.c?id=050aaeab99067b6a08b34274ff15ca5dbb94a160'>050aaeab99067b6a08b34274ff15ca5dbb94a160</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/garmin_gps.c?id=133d970e0dadf7b413db19893acc5b26664bf4a1&amp;id2=050aaeab99067b6a08b34274ff15ca5dbb94a160'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/garmin_gps.c?id=38b8767462120c62a5046b529c80b06861f9ac85'>38b8767462120c62a5046b529c80b06861f9ac85</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/garmin_gps.c?id=133d970e0dadf7b413db19893acc5b26664bf4a1&amp;id2=38b8767462120c62a5046b529c80b06861f9ac85'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus</div><div class='commit-msg'>Pull MIPS updates from Ralf Baechle:
 "This is the main MIPS pull request for 4.9:

  MIPS core arch code:
   - traps: 64bit kernels should read CP0_EBase 64bit
   - traps: Convert ebase to KSEG0
   - c-r4k: Drop bc_wback_inv() from icache flush
   - c-r4k: Split user/kernel flush_icache_range()
   - cacheflush: Use __flush_icache_user_range()
   - uprobes: Flush icache via kernel address
   - KVM: Use __local_flush_icache_user_range()
   - c-r4k: Fix flush_icache_range() for EVA
   - Fix -mabi=64 build of vdso.lds
   - VDSO: Drop duplicated -I*/-E* aflags
   - tracing: move insn_has_delay_slot to a shared header
   - tracing: disable uprobe/kprobe on compact branch instructions
   - ptrace: Fix regs_return_value for kernel context
   - Squash lines for simple wrapper functions
   - Move identification of VP(E) into proc.c from smp-mt.c
   - Add definitions of SYNC barrierstype values
   - traps: Ensure full EBase is written
   - tlb-r4k: If there are wired entries, don't use TLBINVF
   - Sanitise coherentio semantics
   - dma-default: Don't check hw_coherentio if device is non-coherent
   - Support per-device DMA coherence
   - Adjust MIPS64 CAC_BASE to reflect Config.K0
   - Support generating Flattened Image Trees (.itb)
   - generic: Introduce generic DT-based board support
   - generic: Convert SEAD-3 to a generic board
   - Enable hardened usercopy
   - Don't specify STACKPROTECTOR in defconfigs

  Octeon:
   - Delete dead code and files across the platform.
   - Change to use all memory into use by default.
   - Rename upper case variables in setup code to lowercase.
   - Delete legacy hack for broken bootloaders.
   - Leave maintaining the link state to the actual ethernet/PHY drivers.
   - Add DTS for D-Link DSR-500N.
   - Fix PCI interrupt routing on D-Link DSR-500N.

  Pistachio:
   - Remove ANDROID_TIMED_OUTPUT from defconfig

  TX39xx:
   - Move GPIO setup from .mem_setup() to .arch_init()
   - Convert to Common Clock Framework

  TX49xx:
   - Move GPIO setup from .mem_setup() to .arch_init()
   - Convert to Common Clock Framework

  txx9wdt:
   - Add missing clock (un)prepare calls for CCF

  BMIPS:
   - Add PW, GPIO SDHCI and NAND device node names
   - Support APPENDED_DTB
   - Add missing bcm97435svmb to DT_NONE
   - Rename bcm96358nb4ser to bcm6358-neufbox4-sercom
   - Add DT examples for BCM63268, BCM3368 and BCM6362
   - Add support for BCM3368 and BCM6362

  PCI
   - Reduce stack frame usage
   - Use struct list_head lists
   - Support for CONFIG_PCI_DOMAINS_GENERIC
   - Make pcibios_set_cache_line_size an initcall
   - Inline pcibios_assign_all_busses
   - Split pci.c into pci.c &amp; pci-legacy.c
   - Introduce CONFIG_PCI_DRIVERS_LEGACY
   - Support generic drivers

  CPC
   - Convert bare 'unsigned' to 'unsigned int'
   - Avoid lock when MIPS CM &gt;= 3 is present

  GIC:
   - Delete unused file smp-gic.c

  mt7620:
   - Delete unnecessary assignment for the field "owner" from PCI

  BCM63xx:
   - Let clk_disable() return immediately if clk is NULL

  pm-cps:
   - Change FSB workaround to CPU blacklist
   - Update comments on barrier instructions
   - Use MIPS standard lightweight ordering barrier
   - Use MIPS standard completion barrier
   - Remove selection of sync types
   - Add MIPSr6 CPU support
   - Support CM3 changes to Coherence Enable Register

  SMP:
   - Wrap call to mips_cpc_lock_other in mips_cm_lock_other
   - Introduce mechanism for freeing and allocating IPIs

  cpuidle:
   - cpuidle-cps: Enable use with MIPSr6 CPUs.

  SEAD3:
   - Rewrite to use DT and generic kernel feature.

  USB:
   - host: ehci-sead3: Remove SEAD-3 EHCI code

  FBDEV:
   - cobalt_lcdfb: Drop SEAD3 support

  dt-bindings:
   -  Document a binding for simple ASCII LCDs

  auxdisplay:
   - img-ascii-lcd: driver for simple ASCII LCD displays

  irqchip i8259:
   - i8259: Add domain before mapping parent irq
   - i8259: Allow platforms to override poll function
   - i8259: Remove unused i8259A_irq_pending

  Malta:
   - Rewrite to use DT

  of/platform:
   - Probe "isa" busses by default

  CM:
   - Print CM error reports upon bus errors

  Module:
   - Migrate exception table users off module.h and onto extable.h
   - Make various drivers explicitly non-modular:
   - Audit and remove any unnecessary uses of module.h

  mailmap:
   - Canonicalize to Qais' current email address.

  Documentation:
   - MIPS supports HAVE_REGS_AND_STACK_ACCESS_API

  Loongson1C:
   - Add CPU support for Loongson1C
   - Add board support
   - Add defconfig
   - Add RTC support for Loongson1C board

  All this except one Documentation fix has sat in linux-next and has
  survived Imagination's automated build test system"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (127 commits)
  Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
  MIPS: ptrace: Fix regs_return_value for kernel context
  MIPS: VDSO: Drop duplicated -I*/-E* aflags
  MIPS: Fix -mabi=64 build of vdso.lds
  MIPS: Enable hardened usercopy
  MIPS: generic: Convert SEAD-3 to a generic board
  MIPS: generic: Introduce generic DT-based board support
  MIPS: Support generating Flattened Image Trees (.itb)
  MIPS: Adjust MIPS64 CAC_BASE to reflect Config.K0
  MIPS: Print CM error reports upon bus errors
  MIPS: Support per-device DMA coherence
  MIPS: dma-default: Don't check hw_coherentio if device is non-coherent
  MIPS: Sanitise coherentio semantics
  MIPS: PCI: Support generic drivers
  MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY
  MIPS: PCI: Split pci.c into pci.c &amp; pci-legacy.c
  MIPS: PCI: Inline pcibios_assign_all_busses
  MIPS: PCI: Make pcibios_set_cache_line_size an initcall
  MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC
  MIPS: PCI: Use struct list_head lists
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=133d970e0dadf7b413db19893acc5b26664bf4a1'>Diffstat</a> (limited to 'drivers/usb/serial/garmin_gps.c')</div><table summary='diffstat' class='diffstat'>