45c3eb7d3a
Based on earlier discussions[1] we attempted to find a suitable
location for the omap DMA header in commit 2b6c4e73 (ARM: OMAP:
DMA: Move plat/dma.h to plat-omap/dma-omap.h) until the conversion
to dmaengine is complete.
Unfortunately that was before I was able to try to test compile
of the ARM multiplatform builds for omap2+, and the end result
was not very good.
So I'm creating yet another all over the place patch to cut the
last dependency for building omap2+ for ARM multiplatform. After
this, we have finally removed the driver dependencies to the
arch/arm code, except for few drivers that are being worked on.
The other option was to make the <plat-omap/dma-omap.h> path
to work, but we'd have to add some new header directory to for
multiplatform builds.
Or we would have to manually include arch/arm/plat-omap/include
again from arch/arm/Makefile for omap2+.
Neither of these alternatives sound appealing as they will
likely lead addition of various other headers exposed to the
drivers, which we want to avoid for the multiplatform kernels.
Since we already have a minimal include/linux/omap-dma.h,
let's just use that instead and add a note to it to not
use the custom omap DMA functions any longer where possible.
Note that converting omap DMA to dmaengine depends on
dmaengine supporting automatically incrementing the FIFO
address at the device end, and converting all the remaining
legacy drivers. So it's going to be few more merge windows.
[1] https://patchwork.kernel.org/patch/1519591/#
cc: Russell King <linux@arm.linux.org.uk>
cc: Kevin Hilman <khilman@ti.com>
cc: "Benoît Cousson" <b-cousson@ti.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Vinod Koul <vinod.koul@intel.com>
cc: Dan Williams <djbw@fb.com>
cc: Mauro Carvalho Chehab <mchehab@infradead.org>
cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
cc: David Woodhouse <dwmw2@infradead.org>
cc: Kyungmin Park <kyungmin.park@samsung.com>
cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
cc: Hans Verkuil <hans.verkuil@cisco.com>
cc: Vaibhav Hiremath <hvaibhav@ti.com>
cc: Lokesh Vutla <lokeshvutla@ti.com>
cc: Rusty Russell <rusty@rustcorp.com.au>
cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
cc: Afzal Mohammed <afzal@ti.com>
cc: linux-crypto@vger.kernel.org
cc: linux-media@vger.kernel.org
cc: linux-mtd@lists.infradead.org
cc: linux-usb@vger.kernel.org
cc: linux-fbdev@vger.kernel.org
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
122 lines
3 KiB
C
122 lines
3 KiB
C
/*
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* linux/arch/arm/mach-omap2/mcbsp.c
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*
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* Copyright (C) 2008 Instituto Nokia de Tecnologia
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* Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Multichannel mode not supported.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/platform_data/asoc-ti-mcbsp.h>
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#include <linux/pm_runtime.h>
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#include <linux/omap-dma.h>
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#include "omap_device.h"
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/*
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* FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
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* Sidetone needs non-gated ICLK and sidetone autoidle is broken.
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*/
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#include "cm3xxx.h"
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#include "cm-regbits-34xx.h"
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static int omap3_enable_st_clock(unsigned int id, bool enable)
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{
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unsigned int w;
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/*
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* Sidetone uses McBSP ICLK - which must not idle when sidetones
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* are enabled or sidetones start sounding ugly.
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*/
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w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE);
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if (enable)
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w &= ~(1 << (id - 2));
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else
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w |= 1 << (id - 2);
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omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE);
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return 0;
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}
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static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
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{
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int id, count = 1;
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char *name = "omap-mcbsp";
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struct omap_hwmod *oh_device[2];
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struct omap_mcbsp_platform_data *pdata = NULL;
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struct platform_device *pdev;
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sscanf(oh->name, "mcbsp%d", &id);
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pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL);
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if (!pdata) {
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pr_err("%s: No memory for mcbsp\n", __func__);
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return -ENOMEM;
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}
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pdata->reg_step = 4;
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if (oh->class->rev < MCBSP_CONFIG_TYPE2) {
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pdata->reg_size = 2;
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} else {
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pdata->reg_size = 4;
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pdata->has_ccr = true;
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}
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if (oh->class->rev == MCBSP_CONFIG_TYPE2) {
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/* The FIFO has 128 locations */
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pdata->buffer_size = 0x80;
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} else if (oh->class->rev == MCBSP_CONFIG_TYPE3) {
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if (id == 2)
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/* The FIFO has 1024 + 256 locations */
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pdata->buffer_size = 0x500;
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else
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/* The FIFO has 128 locations */
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pdata->buffer_size = 0x80;
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} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
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/* The FIFO has 128 locations for all instances */
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pdata->buffer_size = 0x80;
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}
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if (oh->class->rev >= MCBSP_CONFIG_TYPE3)
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pdata->has_wakeup = true;
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oh_device[0] = oh;
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if (oh->dev_attr) {
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oh_device[1] = omap_hwmod_lookup((
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(struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone);
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pdata->enable_st_clock = omap3_enable_st_clock;
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count++;
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}
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pdev = omap_device_build_ss(name, id, oh_device, count, pdata,
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sizeof(*pdata), NULL, 0, false);
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kfree(pdata);
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if (IS_ERR(pdev)) {
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pr_err("%s: Can't build omap_device for %s:%s.\n", __func__,
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name, oh->name);
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return PTR_ERR(pdev);
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}
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return 0;
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}
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static int __init omap2_mcbsp_init(void)
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{
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if (!of_have_populated_dt())
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omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
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return 0;
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}
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arch_initcall(omap2_mcbsp_init);
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