mirror of https://gitee.com/openkylin/linux.git
172 lines
4.0 KiB
C
172 lines
4.0 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/platform_device.h>
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#include <linux/slab.h>
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#include <mach/irqs.h>
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#include <plat/dma.h>
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#include <plat/cpu.h>
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#include <plat/mcbsp.h>
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#include <plat/omap_device.h>
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#include <linux/pm_runtime.h>
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#include "control.h"
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/* McBSP internal signal muxing functions */
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void omap2_mcbsp1_mux_clkr_src(u8 mux)
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{
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u32 v;
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v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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if (mux == CLKR_SRC_CLKR)
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v &= ~OMAP2_MCBSP1_CLKR_MASK;
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else if (mux == CLKR_SRC_CLKX)
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v |= OMAP2_MCBSP1_CLKR_MASK;
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omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
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}
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EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
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void omap2_mcbsp1_mux_fsr_src(u8 mux)
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{
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u32 v;
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v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
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if (mux == FSR_SRC_FSR)
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v &= ~OMAP2_MCBSP1_FSR_MASK;
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else if (mux == FSR_SRC_FSX)
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v |= OMAP2_MCBSP1_FSR_MASK;
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omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
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}
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EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
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/* McBSP CLKS source switching function */
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int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
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{
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struct omap_mcbsp *mcbsp;
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struct clk *fck_src;
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char *fck_src_name;
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int r;
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if (!omap_mcbsp_check_valid_id(id)) {
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pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
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return -EINVAL;
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}
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mcbsp = id_to_mcbsp_ptr(id);
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if (fck_src_id == MCBSP_CLKS_PAD_SRC)
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fck_src_name = "pad_fck";
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else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
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fck_src_name = "prcm_fck";
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else
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return -EINVAL;
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fck_src = clk_get(mcbsp->dev, fck_src_name);
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if (IS_ERR_OR_NULL(fck_src)) {
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pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks",
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fck_src_name);
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return -EINVAL;
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}
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pm_runtime_put_sync(mcbsp->dev);
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r = clk_set_parent(mcbsp->fclk, fck_src);
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if (IS_ERR_VALUE(r)) {
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pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
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"clks", fck_src_name);
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clk_put(fck_src);
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return -EINVAL;
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}
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pm_runtime_get_sync(mcbsp->dev);
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clk_put(fck_src);
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return 0;
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}
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EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
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struct omap_device_pm_latency omap2_mcbsp_latency[] = {
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{
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.deactivate_func = omap_device_idle_hwmods,
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.activate_func = omap_device_enable_hwmods,
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.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
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},
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};
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static int 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 omap_device *od;
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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->mcbsp_config_type = oh->class->rev;
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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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}
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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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count++;
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}
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od = omap_device_build_ss(name, id, oh_device, count, pdata,
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sizeof(*pdata), omap2_mcbsp_latency,
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ARRAY_SIZE(omap2_mcbsp_latency), false);
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kfree(pdata);
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if (IS_ERR(od)) {
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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(od);
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}
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omap_mcbsp_count++;
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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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omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL);
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mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
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GFP_KERNEL);
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if (!mcbsp_ptr)
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return -ENOMEM;
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return omap_mcbsp_init();
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}
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arch_initcall(omap2_mcbsp_init);
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