/* * mix.c * * Copyright (c) 2015 Kuninori Morimoto * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include "rsnd.h" #define MIX_NAME_SIZE 16 #define MIX_NAME "mix" struct rsnd_mix { struct rsnd_mod mod; }; #define rsnd_mix_get(priv, id) ((struct rsnd_mix *)(priv->mix) + id) #define rsnd_mix_nr(priv) ((priv)->mix_nr) #define for_each_rsnd_mix(pos, priv, i) \ for ((i) = 0; \ ((i) < rsnd_mix_nr(priv)) && \ ((pos) = (struct rsnd_mix *)(priv)->mix + i); \ i++) static void rsnd_mix_activation(struct rsnd_mod *mod) { rsnd_mod_write(mod, MIX_SWRSR, 0); rsnd_mod_write(mod, MIX_SWRSR, 1); } static void rsnd_mix_halt(struct rsnd_mod *mod) { rsnd_mod_write(mod, MIX_MIXIR, 1); rsnd_mod_write(mod, MIX_SWRSR, 0); } static void rsnd_mix_volume_parameter(struct rsnd_dai_stream *io, struct rsnd_mod *mod) { rsnd_mod_write(mod, MIX_MDBAR, 0); rsnd_mod_write(mod, MIX_MDBBR, 0); rsnd_mod_write(mod, MIX_MDBCR, 0); rsnd_mod_write(mod, MIX_MDBDR, 0); } static void rsnd_mix_volume_init(struct rsnd_dai_stream *io, struct rsnd_mod *mod) { rsnd_mod_write(mod, MIX_MIXIR, 1); /* General Information */ rsnd_mod_write(mod, MIX_ADINR, rsnd_runtime_channel_after_ctu(io)); /* volume step */ rsnd_mod_write(mod, MIX_MIXMR, 0); rsnd_mod_write(mod, MIX_MVPDR, 0); /* common volume parameter */ rsnd_mix_volume_parameter(io, mod); rsnd_mod_write(mod, MIX_MIXIR, 0); } static void rsnd_mix_volume_update(struct rsnd_dai_stream *io, struct rsnd_mod *mod) { /* Disable MIX dB setting */ rsnd_mod_write(mod, MIX_MDBER, 0); /* common volume parameter */ rsnd_mix_volume_parameter(io, mod); /* Enable MIX dB setting */ rsnd_mod_write(mod, MIX_MDBER, 1); } static int rsnd_mix_probe_(struct rsnd_mod *mod, struct rsnd_dai_stream *io, struct rsnd_priv *priv) { return rsnd_cmd_attach(io, rsnd_mod_id(mod)); } static int rsnd_mix_init(struct rsnd_mod *mod, struct rsnd_dai_stream *io, struct rsnd_priv *priv) { rsnd_mod_power_on(mod); rsnd_mix_activation(mod); rsnd_mix_volume_init(io, mod); rsnd_mix_volume_update(io, mod); return 0; } static int rsnd_mix_quit(struct rsnd_mod *mod, struct rsnd_dai_stream *io, struct rsnd_priv *priv) { rsnd_mix_halt(mod); rsnd_mod_power_off(mod); return 0; } static struct rsnd_mod_ops rsnd_mix_ops = { .name = MIX_NAME, .probe = rsnd_mix_probe_, .init = rsnd_mix_init, .quit = rsnd_mix_quit, }; struct rsnd_mod *rsnd_mix_mod_get(struct rsnd_priv *priv, int id) { if (WARN_ON(id < 0 || id >= rsnd_mix_nr(priv))) id = 0; return rsnd_mod_get(rsnd_mix_get(priv, id)); } int rsnd_mix_probe(struct rsnd_priv *priv) { struct device_node *node; struct device_node *np; struct device *dev = rsnd_priv_to_dev(priv); struct rsnd_mix *mix; struct clk *clk; char name[MIX_NAME_SIZE]; int i, nr, ret; /* This driver doesn't support Gen1 at this point */ if (rsnd_is_gen1(priv)) return 0; node = rsnd_mix_of_node(priv); if (!node) return 0; /* not used is not error */ nr = of_get_child_count(node); if (!nr) { ret = -EINVAL; goto rsnd_mix_probe_done; } mix = devm_kzalloc(dev, sizeof(*mix) * nr, GFP_KERNEL); if (!mix) { ret = -ENOMEM; goto rsnd_mix_probe_done; } priv->mix_nr = nr; priv->mix = mix; i = 0; ret = 0; for_each_child_of_node(node, np) { mix = rsnd_mix_get(priv, i); snprintf(name, MIX_NAME_SIZE, "%s.%d", MIX_NAME, i); clk = devm_clk_get(dev, name); if (IS_ERR(clk)) { ret = PTR_ERR(clk); goto rsnd_mix_probe_done; } ret = rsnd_mod_init(priv, rsnd_mod_get(mix), &rsnd_mix_ops, clk, rsnd_mod_get_status, RSND_MOD_MIX, i); if (ret) goto rsnd_mix_probe_done; i++; } rsnd_mix_probe_done: of_node_put(node); return ret; } void rsnd_mix_remove(struct rsnd_priv *priv) { struct rsnd_mix *mix; int i; for_each_rsnd_mix(mix, priv, i) { rsnd_mod_quit(rsnd_mod_get(mix)); } } ed'>3space:mode:
authorDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
commit54791b276b4000b307339f269d3bf7db877d536f (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /sound/soc/omap/omap-mcbsp.h
parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)
parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/soc/omap/omap-mcbsp.h')