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![Andy Shevchenko](/assets/img/avatar_default.png)
Use sysfs_match_string() helper instead of open coded variant. Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Cc: Jarkko Nikula <jarkko.nikula@bitmer.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
1104 lines
27 KiB
C
1104 lines
27 KiB
C
/*
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* sound/soc/omap/mcbsp.c
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*
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* Copyright (C) 2004 Nokia Corporation
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* Author: Samuel Ortiz <samuel.ortiz@nokia.com>
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*
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* Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
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* Peter Ujfalusi <peter.ujfalusi@ti.com>
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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/device.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_data/asoc-ti-mcbsp.h>
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#include "mcbsp.h"
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static void omap_mcbsp_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
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{
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void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
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if (mcbsp->pdata->reg_size == 2) {
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((u16 *)mcbsp->reg_cache)[reg] = (u16)val;
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writew_relaxed((u16)val, addr);
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} else {
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((u32 *)mcbsp->reg_cache)[reg] = val;
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writel_relaxed(val, addr);
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}
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}
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static int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg, bool from_cache)
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{
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void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
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if (mcbsp->pdata->reg_size == 2) {
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return !from_cache ? readw_relaxed(addr) :
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((u16 *)mcbsp->reg_cache)[reg];
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} else {
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return !from_cache ? readl_relaxed(addr) :
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((u32 *)mcbsp->reg_cache)[reg];
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}
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}
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static void omap_mcbsp_st_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
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{
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writel_relaxed(val, mcbsp->st_data->io_base_st + reg);
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}
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static int omap_mcbsp_st_read(struct omap_mcbsp *mcbsp, u16 reg)
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{
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return readl_relaxed(mcbsp->st_data->io_base_st + reg);
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}
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#define MCBSP_READ(mcbsp, reg) \
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omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 0)
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#define MCBSP_WRITE(mcbsp, reg, val) \
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omap_mcbsp_write(mcbsp, OMAP_MCBSP_REG_##reg, val)
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#define MCBSP_READ_CACHE(mcbsp, reg) \
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omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 1)
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#define MCBSP_ST_READ(mcbsp, reg) \
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omap_mcbsp_st_read(mcbsp, OMAP_ST_REG_##reg)
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#define MCBSP_ST_WRITE(mcbsp, reg, val) \
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omap_mcbsp_st_write(mcbsp, OMAP_ST_REG_##reg, val)
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static void omap_mcbsp_dump_reg(struct omap_mcbsp *mcbsp)
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{
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dev_dbg(mcbsp->dev, "**** McBSP%d regs ****\n", mcbsp->id);
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dev_dbg(mcbsp->dev, "DRR2: 0x%04x\n",
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MCBSP_READ(mcbsp, DRR2));
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dev_dbg(mcbsp->dev, "DRR1: 0x%04x\n",
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MCBSP_READ(mcbsp, DRR1));
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dev_dbg(mcbsp->dev, "DXR2: 0x%04x\n",
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MCBSP_READ(mcbsp, DXR2));
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dev_dbg(mcbsp->dev, "DXR1: 0x%04x\n",
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MCBSP_READ(mcbsp, DXR1));
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dev_dbg(mcbsp->dev, "SPCR2: 0x%04x\n",
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MCBSP_READ(mcbsp, SPCR2));
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dev_dbg(mcbsp->dev, "SPCR1: 0x%04x\n",
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MCBSP_READ(mcbsp, SPCR1));
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dev_dbg(mcbsp->dev, "RCR2: 0x%04x\n",
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MCBSP_READ(mcbsp, RCR2));
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dev_dbg(mcbsp->dev, "RCR1: 0x%04x\n",
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MCBSP_READ(mcbsp, RCR1));
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dev_dbg(mcbsp->dev, "XCR2: 0x%04x\n",
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MCBSP_READ(mcbsp, XCR2));
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dev_dbg(mcbsp->dev, "XCR1: 0x%04x\n",
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MCBSP_READ(mcbsp, XCR1));
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dev_dbg(mcbsp->dev, "SRGR2: 0x%04x\n",
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MCBSP_READ(mcbsp, SRGR2));
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dev_dbg(mcbsp->dev, "SRGR1: 0x%04x\n",
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MCBSP_READ(mcbsp, SRGR1));
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dev_dbg(mcbsp->dev, "PCR0: 0x%04x\n",
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MCBSP_READ(mcbsp, PCR0));
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dev_dbg(mcbsp->dev, "***********************\n");
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}
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static irqreturn_t omap_mcbsp_irq_handler(int irq, void *dev_id)
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{
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struct omap_mcbsp *mcbsp = dev_id;
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u16 irqst;
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irqst = MCBSP_READ(mcbsp, IRQST);
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dev_dbg(mcbsp->dev, "IRQ callback : 0x%x\n", irqst);
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if (irqst & RSYNCERREN)
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dev_err(mcbsp->dev, "RX Frame Sync Error!\n");
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if (irqst & RFSREN)
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dev_dbg(mcbsp->dev, "RX Frame Sync\n");
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if (irqst & REOFEN)
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dev_dbg(mcbsp->dev, "RX End Of Frame\n");
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if (irqst & RRDYEN)
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dev_dbg(mcbsp->dev, "RX Buffer Threshold Reached\n");
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if (irqst & RUNDFLEN)
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dev_err(mcbsp->dev, "RX Buffer Underflow!\n");
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if (irqst & ROVFLEN)
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dev_err(mcbsp->dev, "RX Buffer Overflow!\n");
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if (irqst & XSYNCERREN)
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dev_err(mcbsp->dev, "TX Frame Sync Error!\n");
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if (irqst & XFSXEN)
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dev_dbg(mcbsp->dev, "TX Frame Sync\n");
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if (irqst & XEOFEN)
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dev_dbg(mcbsp->dev, "TX End Of Frame\n");
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if (irqst & XRDYEN)
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dev_dbg(mcbsp->dev, "TX Buffer threshold Reached\n");
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if (irqst & XUNDFLEN)
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dev_err(mcbsp->dev, "TX Buffer Underflow!\n");
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if (irqst & XOVFLEN)
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dev_err(mcbsp->dev, "TX Buffer Overflow!\n");
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if (irqst & XEMPTYEOFEN)
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dev_dbg(mcbsp->dev, "TX Buffer empty at end of frame\n");
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MCBSP_WRITE(mcbsp, IRQST, irqst);
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return IRQ_HANDLED;
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}
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static irqreturn_t omap_mcbsp_tx_irq_handler(int irq, void *dev_id)
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{
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struct omap_mcbsp *mcbsp_tx = dev_id;
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u16 irqst_spcr2;
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irqst_spcr2 = MCBSP_READ(mcbsp_tx, SPCR2);
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dev_dbg(mcbsp_tx->dev, "TX IRQ callback : 0x%x\n", irqst_spcr2);
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if (irqst_spcr2 & XSYNC_ERR) {
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dev_err(mcbsp_tx->dev, "TX Frame Sync Error! : 0x%x\n",
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irqst_spcr2);
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/* Writing zero to XSYNC_ERR clears the IRQ */
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MCBSP_WRITE(mcbsp_tx, SPCR2, MCBSP_READ_CACHE(mcbsp_tx, SPCR2));
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}
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return IRQ_HANDLED;
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}
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static irqreturn_t omap_mcbsp_rx_irq_handler(int irq, void *dev_id)
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{
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struct omap_mcbsp *mcbsp_rx = dev_id;
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u16 irqst_spcr1;
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irqst_spcr1 = MCBSP_READ(mcbsp_rx, SPCR1);
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dev_dbg(mcbsp_rx->dev, "RX IRQ callback : 0x%x\n", irqst_spcr1);
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if (irqst_spcr1 & RSYNC_ERR) {
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dev_err(mcbsp_rx->dev, "RX Frame Sync Error! : 0x%x\n",
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irqst_spcr1);
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/* Writing zero to RSYNC_ERR clears the IRQ */
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MCBSP_WRITE(mcbsp_rx, SPCR1, MCBSP_READ_CACHE(mcbsp_rx, SPCR1));
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}
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return IRQ_HANDLED;
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}
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/*
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* omap_mcbsp_config simply write a config to the
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* appropriate McBSP.
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* You either call this function or set the McBSP registers
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* by yourself before calling omap_mcbsp_start().
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*/
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void omap_mcbsp_config(struct omap_mcbsp *mcbsp,
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const struct omap_mcbsp_reg_cfg *config)
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{
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dev_dbg(mcbsp->dev, "Configuring McBSP%d phys_base: 0x%08lx\n",
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mcbsp->id, mcbsp->phys_base);
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/* We write the given config */
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MCBSP_WRITE(mcbsp, SPCR2, config->spcr2);
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MCBSP_WRITE(mcbsp, SPCR1, config->spcr1);
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MCBSP_WRITE(mcbsp, RCR2, config->rcr2);
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MCBSP_WRITE(mcbsp, RCR1, config->rcr1);
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MCBSP_WRITE(mcbsp, XCR2, config->xcr2);
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MCBSP_WRITE(mcbsp, XCR1, config->xcr1);
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MCBSP_WRITE(mcbsp, SRGR2, config->srgr2);
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MCBSP_WRITE(mcbsp, SRGR1, config->srgr1);
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MCBSP_WRITE(mcbsp, MCR2, config->mcr2);
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MCBSP_WRITE(mcbsp, MCR1, config->mcr1);
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MCBSP_WRITE(mcbsp, PCR0, config->pcr0);
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if (mcbsp->pdata->has_ccr) {
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MCBSP_WRITE(mcbsp, XCCR, config->xccr);
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MCBSP_WRITE(mcbsp, RCCR, config->rccr);
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}
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/* Enable wakeup behavior */
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if (mcbsp->pdata->has_wakeup)
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MCBSP_WRITE(mcbsp, WAKEUPEN, XRDYEN | RRDYEN);
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/* Enable TX/RX sync error interrupts by default */
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if (mcbsp->irq)
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MCBSP_WRITE(mcbsp, IRQEN, RSYNCERREN | XSYNCERREN |
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RUNDFLEN | ROVFLEN | XUNDFLEN | XOVFLEN);
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}
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/**
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* omap_mcbsp_dma_reg_params - returns the address of mcbsp data register
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* @id - mcbsp id
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* @stream - indicates the direction of data flow (rx or tx)
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*
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* Returns the address of mcbsp data transmit register or data receive register
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* to be used by DMA for transferring/receiving data based on the value of
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* @stream for the requested mcbsp given by @id
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*/
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static int omap_mcbsp_dma_reg_params(struct omap_mcbsp *mcbsp,
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unsigned int stream)
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{
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int data_reg;
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if (mcbsp->pdata->reg_size == 2) {
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if (stream)
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data_reg = OMAP_MCBSP_REG_DRR1;
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else
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data_reg = OMAP_MCBSP_REG_DXR1;
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} else {
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if (stream)
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data_reg = OMAP_MCBSP_REG_DRR;
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else
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data_reg = OMAP_MCBSP_REG_DXR;
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}
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return mcbsp->phys_dma_base + data_reg * mcbsp->pdata->reg_step;
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}
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static void omap_st_on(struct omap_mcbsp *mcbsp)
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{
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unsigned int w;
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if (mcbsp->pdata->force_ick_on)
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mcbsp->pdata->force_ick_on(mcbsp->st_data->mcbsp_iclk, true);
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/* Disable Sidetone clock auto-gating for normal operation */
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w = MCBSP_ST_READ(mcbsp, SYSCONFIG);
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MCBSP_ST_WRITE(mcbsp, SYSCONFIG, w & ~(ST_AUTOIDLE));
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/* Enable McBSP Sidetone */
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w = MCBSP_READ(mcbsp, SSELCR);
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MCBSP_WRITE(mcbsp, SSELCR, w | SIDETONEEN);
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/* Enable Sidetone from Sidetone Core */
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w = MCBSP_ST_READ(mcbsp, SSELCR);
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MCBSP_ST_WRITE(mcbsp, SSELCR, w | ST_SIDETONEEN);
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}
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static void omap_st_off(struct omap_mcbsp *mcbsp)
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{
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unsigned int w;
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w = MCBSP_ST_READ(mcbsp, SSELCR);
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MCBSP_ST_WRITE(mcbsp, SSELCR, w & ~(ST_SIDETONEEN));
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w = MCBSP_READ(mcbsp, SSELCR);
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MCBSP_WRITE(mcbsp, SSELCR, w & ~(SIDETONEEN));
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/* Enable Sidetone clock auto-gating to reduce power consumption */
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w = MCBSP_ST_READ(mcbsp, SYSCONFIG);
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MCBSP_ST_WRITE(mcbsp, SYSCONFIG, w | ST_AUTOIDLE);
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if (mcbsp->pdata->force_ick_on)
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mcbsp->pdata->force_ick_on(mcbsp->st_data->mcbsp_iclk, false);
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}
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static void omap_st_fir_write(struct omap_mcbsp *mcbsp, s16 *fir)
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{
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u16 val, i;
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val = MCBSP_ST_READ(mcbsp, SSELCR);
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if (val & ST_COEFFWREN)
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MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
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MCBSP_ST_WRITE(mcbsp, SSELCR, val | ST_COEFFWREN);
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for (i = 0; i < 128; i++)
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MCBSP_ST_WRITE(mcbsp, SFIRCR, fir[i]);
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i = 0;
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val = MCBSP_ST_READ(mcbsp, SSELCR);
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while (!(val & ST_COEFFWRDONE) && (++i < 1000))
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val = MCBSP_ST_READ(mcbsp, SSELCR);
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MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
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if (i == 1000)
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dev_err(mcbsp->dev, "McBSP FIR load error!\n");
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}
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static void omap_st_chgain(struct omap_mcbsp *mcbsp)
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{
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u16 w;
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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w = MCBSP_ST_READ(mcbsp, SSELCR);
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MCBSP_ST_WRITE(mcbsp, SGAINCR, ST_CH0GAIN(st_data->ch0gain) | \
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ST_CH1GAIN(st_data->ch1gain));
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}
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int omap_st_set_chgain(struct omap_mcbsp *mcbsp, int channel, s16 chgain)
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{
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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int ret = 0;
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if (!st_data)
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return -ENOENT;
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spin_lock_irq(&mcbsp->lock);
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if (channel == 0)
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st_data->ch0gain = chgain;
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else if (channel == 1)
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st_data->ch1gain = chgain;
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else
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ret = -EINVAL;
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if (st_data->enabled)
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omap_st_chgain(mcbsp);
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spin_unlock_irq(&mcbsp->lock);
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return ret;
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}
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int omap_st_get_chgain(struct omap_mcbsp *mcbsp, int channel, s16 *chgain)
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{
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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int ret = 0;
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if (!st_data)
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return -ENOENT;
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spin_lock_irq(&mcbsp->lock);
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if (channel == 0)
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*chgain = st_data->ch0gain;
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else if (channel == 1)
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*chgain = st_data->ch1gain;
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else
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ret = -EINVAL;
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spin_unlock_irq(&mcbsp->lock);
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return ret;
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}
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static int omap_st_start(struct omap_mcbsp *mcbsp)
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{
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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if (st_data->enabled && !st_data->running) {
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omap_st_fir_write(mcbsp, st_data->taps);
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omap_st_chgain(mcbsp);
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if (!mcbsp->free) {
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omap_st_on(mcbsp);
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st_data->running = 1;
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}
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}
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return 0;
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}
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int omap_st_enable(struct omap_mcbsp *mcbsp)
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{
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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if (!st_data)
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return -ENODEV;
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spin_lock_irq(&mcbsp->lock);
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st_data->enabled = 1;
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omap_st_start(mcbsp);
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spin_unlock_irq(&mcbsp->lock);
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return 0;
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}
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static int omap_st_stop(struct omap_mcbsp *mcbsp)
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{
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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if (st_data->running) {
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if (!mcbsp->free) {
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omap_st_off(mcbsp);
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st_data->running = 0;
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}
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}
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return 0;
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}
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int omap_st_disable(struct omap_mcbsp *mcbsp)
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{
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struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
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int ret = 0;
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if (!st_data)
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return -ENODEV;
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spin_lock_irq(&mcbsp->lock);
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omap_st_stop(mcbsp);
|
|
st_data->enabled = 0;
|
|
spin_unlock_irq(&mcbsp->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int omap_st_is_enabled(struct omap_mcbsp *mcbsp)
|
|
{
|
|
struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
|
|
|
|
if (!st_data)
|
|
return -ENODEV;
|
|
|
|
return st_data->enabled;
|
|
}
|
|
|
|
/*
|
|
* omap_mcbsp_set_rx_threshold configures the transmit threshold in words.
|
|
* The threshold parameter is 1 based, and it is converted (threshold - 1)
|
|
* for the THRSH2 register.
|
|
*/
|
|
void omap_mcbsp_set_tx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
|
|
{
|
|
if (mcbsp->pdata->buffer_size == 0)
|
|
return;
|
|
|
|
if (threshold && threshold <= mcbsp->max_tx_thres)
|
|
MCBSP_WRITE(mcbsp, THRSH2, threshold - 1);
|
|
}
|
|
|
|
/*
|
|
* omap_mcbsp_set_rx_threshold configures the receive threshold in words.
|
|
* The threshold parameter is 1 based, and it is converted (threshold - 1)
|
|
* for the THRSH1 register.
|
|
*/
|
|
void omap_mcbsp_set_rx_threshold(struct omap_mcbsp *mcbsp, u16 threshold)
|
|
{
|
|
if (mcbsp->pdata->buffer_size == 0)
|
|
return;
|
|
|
|
if (threshold && threshold <= mcbsp->max_rx_thres)
|
|
MCBSP_WRITE(mcbsp, THRSH1, threshold - 1);
|
|
}
|
|
|
|
/*
|
|
* omap_mcbsp_get_tx_delay returns the number of used slots in the McBSP FIFO
|
|
*/
|
|
u16 omap_mcbsp_get_tx_delay(struct omap_mcbsp *mcbsp)
|
|
{
|
|
u16 buffstat;
|
|
|
|
if (mcbsp->pdata->buffer_size == 0)
|
|
return 0;
|
|
|
|
/* Returns the number of free locations in the buffer */
|
|
buffstat = MCBSP_READ(mcbsp, XBUFFSTAT);
|
|
|
|
/* Number of slots are different in McBSP ports */
|
|
return mcbsp->pdata->buffer_size - buffstat;
|
|
}
|
|
|
|
/*
|
|
* omap_mcbsp_get_rx_delay returns the number of free slots in the McBSP FIFO
|
|
* to reach the threshold value (when the DMA will be triggered to read it)
|
|
*/
|
|
u16 omap_mcbsp_get_rx_delay(struct omap_mcbsp *mcbsp)
|
|
{
|
|
u16 buffstat, threshold;
|
|
|
|
if (mcbsp->pdata->buffer_size == 0)
|
|
return 0;
|
|
|
|
/* Returns the number of used locations in the buffer */
|
|
buffstat = MCBSP_READ(mcbsp, RBUFFSTAT);
|
|
/* RX threshold */
|
|
threshold = MCBSP_READ(mcbsp, THRSH1);
|
|
|
|
/* Return the number of location till we reach the threshold limit */
|
|
if (threshold <= buffstat)
|
|
return 0;
|
|
else
|
|
return threshold - buffstat;
|
|
}
|
|
|
|
int omap_mcbsp_request(struct omap_mcbsp *mcbsp)
|
|
{
|
|
void *reg_cache;
|
|
int err;
|
|
|
|
reg_cache = kzalloc(mcbsp->reg_cache_size, GFP_KERNEL);
|
|
if (!reg_cache) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
spin_lock(&mcbsp->lock);
|
|
if (!mcbsp->free) {
|
|
dev_err(mcbsp->dev, "McBSP%d is currently in use\n",
|
|
mcbsp->id);
|
|
err = -EBUSY;
|
|
goto err_kfree;
|
|
}
|
|
|
|
mcbsp->free = false;
|
|
mcbsp->reg_cache = reg_cache;
|
|
spin_unlock(&mcbsp->lock);
|
|
|
|
if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request)
|
|
mcbsp->pdata->ops->request(mcbsp->id - 1);
|
|
|
|
/*
|
|
* Make sure that transmitter, receiver and sample-rate generator are
|
|
* not running before activating IRQs.
|
|
*/
|
|
MCBSP_WRITE(mcbsp, SPCR1, 0);
|
|
MCBSP_WRITE(mcbsp, SPCR2, 0);
|
|
|
|
if (mcbsp->irq) {
|
|
err = request_irq(mcbsp->irq, omap_mcbsp_irq_handler, 0,
|
|
"McBSP", (void *)mcbsp);
|
|
if (err != 0) {
|
|
dev_err(mcbsp->dev, "Unable to request IRQ\n");
|
|
goto err_clk_disable;
|
|
}
|
|
} else {
|
|
err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, 0,
|
|
"McBSP TX", (void *)mcbsp);
|
|
if (err != 0) {
|
|
dev_err(mcbsp->dev, "Unable to request TX IRQ\n");
|
|
goto err_clk_disable;
|
|
}
|
|
|
|
err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, 0,
|
|
"McBSP RX", (void *)mcbsp);
|
|
if (err != 0) {
|
|
dev_err(mcbsp->dev, "Unable to request RX IRQ\n");
|
|
goto err_free_irq;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
err_free_irq:
|
|
free_irq(mcbsp->tx_irq, (void *)mcbsp);
|
|
err_clk_disable:
|
|
if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free)
|
|
mcbsp->pdata->ops->free(mcbsp->id - 1);
|
|
|
|
/* Disable wakeup behavior */
|
|
if (mcbsp->pdata->has_wakeup)
|
|
MCBSP_WRITE(mcbsp, WAKEUPEN, 0);
|
|
|
|
spin_lock(&mcbsp->lock);
|
|
mcbsp->free = true;
|
|
mcbsp->reg_cache = NULL;
|
|
err_kfree:
|
|
spin_unlock(&mcbsp->lock);
|
|
kfree(reg_cache);
|
|
|
|
return err;
|
|
}
|
|
|
|
void omap_mcbsp_free(struct omap_mcbsp *mcbsp)
|
|
{
|
|
void *reg_cache;
|
|
|
|
if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free)
|
|
mcbsp->pdata->ops->free(mcbsp->id - 1);
|
|
|
|
/* Disable wakeup behavior */
|
|
if (mcbsp->pdata->has_wakeup)
|
|
MCBSP_WRITE(mcbsp, WAKEUPEN, 0);
|
|
|
|
/* Disable interrupt requests */
|
|
if (mcbsp->irq)
|
|
MCBSP_WRITE(mcbsp, IRQEN, 0);
|
|
|
|
if (mcbsp->irq) {
|
|
free_irq(mcbsp->irq, (void *)mcbsp);
|
|
} else {
|
|
free_irq(mcbsp->rx_irq, (void *)mcbsp);
|
|
free_irq(mcbsp->tx_irq, (void *)mcbsp);
|
|
}
|
|
|
|
reg_cache = mcbsp->reg_cache;
|
|
|
|
/*
|
|
* Select CLKS source from internal source unconditionally before
|
|
* marking the McBSP port as free.
|
|
* If the external clock source via MCBSP_CLKS pin has been selected the
|
|
* system will refuse to enter idle if the CLKS pin source is not reset
|
|
* back to internal source.
|
|
*/
|
|
if (!mcbsp_omap1())
|
|
omap2_mcbsp_set_clks_src(mcbsp, MCBSP_CLKS_PRCM_SRC);
|
|
|
|
spin_lock(&mcbsp->lock);
|
|
if (mcbsp->free)
|
|
dev_err(mcbsp->dev, "McBSP%d was not reserved\n", mcbsp->id);
|
|
else
|
|
mcbsp->free = true;
|
|
mcbsp->reg_cache = NULL;
|
|
spin_unlock(&mcbsp->lock);
|
|
|
|
kfree(reg_cache);
|
|
}
|
|
|
|
/*
|
|
* Here we start the McBSP, by enabling transmitter, receiver or both.
|
|
* If no transmitter or receiver is active prior calling, then sample-rate
|
|
* generator and frame sync are started.
|
|
*/
|
|
void omap_mcbsp_start(struct omap_mcbsp *mcbsp, int tx, int rx)
|
|
{
|
|
int enable_srg = 0;
|
|
u16 w;
|
|
|
|
if (mcbsp->st_data)
|
|
omap_st_start(mcbsp);
|
|
|
|
/* Only enable SRG, if McBSP is master */
|
|
w = MCBSP_READ_CACHE(mcbsp, PCR0);
|
|
if (w & (FSXM | FSRM | CLKXM | CLKRM))
|
|
enable_srg = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
|
|
MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
|
|
|
|
if (enable_srg) {
|
|
/* Start the sample generator */
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR2);
|
|
MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 6));
|
|
}
|
|
|
|
/* Enable transmitter and receiver */
|
|
tx &= 1;
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR2);
|
|
MCBSP_WRITE(mcbsp, SPCR2, w | tx);
|
|
|
|
rx &= 1;
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR1);
|
|
MCBSP_WRITE(mcbsp, SPCR1, w | rx);
|
|
|
|
/*
|
|
* Worst case: CLKSRG*2 = 8000khz: (1/8000) * 2 * 2 usec
|
|
* REVISIT: 100us may give enough time for two CLKSRG, however
|
|
* due to some unknown PM related, clock gating etc. reason it
|
|
* is now at 500us.
|
|
*/
|
|
udelay(500);
|
|
|
|
if (enable_srg) {
|
|
/* Start frame sync */
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR2);
|
|
MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 7));
|
|
}
|
|
|
|
if (mcbsp->pdata->has_ccr) {
|
|
/* Release the transmitter and receiver */
|
|
w = MCBSP_READ_CACHE(mcbsp, XCCR);
|
|
w &= ~(tx ? XDISABLE : 0);
|
|
MCBSP_WRITE(mcbsp, XCCR, w);
|
|
w = MCBSP_READ_CACHE(mcbsp, RCCR);
|
|
w &= ~(rx ? RDISABLE : 0);
|
|
MCBSP_WRITE(mcbsp, RCCR, w);
|
|
}
|
|
|
|
/* Dump McBSP Regs */
|
|
omap_mcbsp_dump_reg(mcbsp);
|
|
}
|
|
|
|
void omap_mcbsp_stop(struct omap_mcbsp *mcbsp, int tx, int rx)
|
|
{
|
|
int idle;
|
|
u16 w;
|
|
|
|
/* Reset transmitter */
|
|
tx &= 1;
|
|
if (mcbsp->pdata->has_ccr) {
|
|
w = MCBSP_READ_CACHE(mcbsp, XCCR);
|
|
w |= (tx ? XDISABLE : 0);
|
|
MCBSP_WRITE(mcbsp, XCCR, w);
|
|
}
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR2);
|
|
MCBSP_WRITE(mcbsp, SPCR2, w & ~tx);
|
|
|
|
/* Reset receiver */
|
|
rx &= 1;
|
|
if (mcbsp->pdata->has_ccr) {
|
|
w = MCBSP_READ_CACHE(mcbsp, RCCR);
|
|
w |= (rx ? RDISABLE : 0);
|
|
MCBSP_WRITE(mcbsp, RCCR, w);
|
|
}
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR1);
|
|
MCBSP_WRITE(mcbsp, SPCR1, w & ~rx);
|
|
|
|
idle = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
|
|
MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
|
|
|
|
if (idle) {
|
|
/* Reset the sample rate generator */
|
|
w = MCBSP_READ_CACHE(mcbsp, SPCR2);
|
|
MCBSP_WRITE(mcbsp, SPCR2, w & ~(1 << 6));
|
|
}
|
|
|
|
if (mcbsp->st_data)
|
|
omap_st_stop(mcbsp);
|
|
}
|
|
|
|
int omap2_mcbsp_set_clks_src(struct omap_mcbsp *mcbsp, u8 fck_src_id)
|
|
{
|
|
struct clk *fck_src;
|
|
const char *src;
|
|
int r;
|
|
|
|
if (fck_src_id == MCBSP_CLKS_PAD_SRC)
|
|
src = "pad_fck";
|
|
else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
|
|
src = "prcm_fck";
|
|
else
|
|
return -EINVAL;
|
|
|
|
fck_src = clk_get(mcbsp->dev, src);
|
|
if (IS_ERR(fck_src)) {
|
|
dev_err(mcbsp->dev, "CLKS: could not clk_get() %s\n", src);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pm_runtime_put_sync(mcbsp->dev);
|
|
|
|
r = clk_set_parent(mcbsp->fclk, fck_src);
|
|
if (r) {
|
|
dev_err(mcbsp->dev, "CLKS: could not clk_set_parent() to %s\n",
|
|
src);
|
|
clk_put(fck_src);
|
|
return r;
|
|
}
|
|
|
|
pm_runtime_get_sync(mcbsp->dev);
|
|
|
|
clk_put(fck_src);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#define max_thres(m) (mcbsp->pdata->buffer_size)
|
|
#define valid_threshold(m, val) ((val) <= max_thres(m))
|
|
#define THRESHOLD_PROP_BUILDER(prop) \
|
|
static ssize_t prop##_show(struct device *dev, \
|
|
struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \
|
|
\
|
|
return sprintf(buf, "%u\n", mcbsp->prop); \
|
|
} \
|
|
\
|
|
static ssize_t prop##_store(struct device *dev, \
|
|
struct device_attribute *attr, \
|
|
const char *buf, size_t size) \
|
|
{ \
|
|
struct omap_mcbsp *mcbsp = dev_get_drvdata(dev); \
|
|
unsigned long val; \
|
|
int status; \
|
|
\
|
|
status = kstrtoul(buf, 0, &val); \
|
|
if (status) \
|
|
return status; \
|
|
\
|
|
if (!valid_threshold(mcbsp, val)) \
|
|
return -EDOM; \
|
|
\
|
|
mcbsp->prop = val; \
|
|
return size; \
|
|
} \
|
|
\
|
|
static DEVICE_ATTR(prop, 0644, prop##_show, prop##_store);
|
|
|
|
THRESHOLD_PROP_BUILDER(max_tx_thres);
|
|
THRESHOLD_PROP_BUILDER(max_rx_thres);
|
|
|
|
static const char *dma_op_modes[] = {
|
|
"element", "threshold",
|
|
};
|
|
|
|
static ssize_t dma_op_mode_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
|
|
int dma_op_mode, i = 0;
|
|
ssize_t len = 0;
|
|
const char * const *s;
|
|
|
|
dma_op_mode = mcbsp->dma_op_mode;
|
|
|
|
for (s = &dma_op_modes[i]; i < ARRAY_SIZE(dma_op_modes); s++, i++) {
|
|
if (dma_op_mode == i)
|
|
len += sprintf(buf + len, "[%s] ", *s);
|
|
else
|
|
len += sprintf(buf + len, "%s ", *s);
|
|
}
|
|
len += sprintf(buf + len, "\n");
|
|
|
|
return len;
|
|
}
|
|
|
|
static ssize_t dma_op_mode_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
|
|
int i;
|
|
|
|
i = sysfs_match_string(dma_op_modes, buf);
|
|
if (i < 0)
|
|
return i;
|
|
|
|
spin_lock_irq(&mcbsp->lock);
|
|
if (!mcbsp->free) {
|
|
size = -EBUSY;
|
|
goto unlock;
|
|
}
|
|
mcbsp->dma_op_mode = i;
|
|
|
|
unlock:
|
|
spin_unlock_irq(&mcbsp->lock);
|
|
|
|
return size;
|
|
}
|
|
|
|
static DEVICE_ATTR(dma_op_mode, 0644, dma_op_mode_show, dma_op_mode_store);
|
|
|
|
static const struct attribute *additional_attrs[] = {
|
|
&dev_attr_max_tx_thres.attr,
|
|
&dev_attr_max_rx_thres.attr,
|
|
&dev_attr_dma_op_mode.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group additional_attr_group = {
|
|
.attrs = (struct attribute **)additional_attrs,
|
|
};
|
|
|
|
static ssize_t st_taps_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
|
|
struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
|
|
ssize_t status = 0;
|
|
int i;
|
|
|
|
spin_lock_irq(&mcbsp->lock);
|
|
for (i = 0; i < st_data->nr_taps; i++)
|
|
status += sprintf(&buf[status], (i ? ", %d" : "%d"),
|
|
st_data->taps[i]);
|
|
if (i)
|
|
status += sprintf(&buf[status], "\n");
|
|
spin_unlock_irq(&mcbsp->lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
static ssize_t st_taps_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
|
|
struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
|
|
int val, tmp, status, i = 0;
|
|
|
|
spin_lock_irq(&mcbsp->lock);
|
|
memset(st_data->taps, 0, sizeof(st_data->taps));
|
|
st_data->nr_taps = 0;
|
|
|
|
do {
|
|
status = sscanf(buf, "%d%n", &val, &tmp);
|
|
if (status < 0 || status == 0) {
|
|
size = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (val < -32768 || val > 32767) {
|
|
size = -EINVAL;
|
|
goto out;
|
|
}
|
|
st_data->taps[i++] = val;
|
|
buf += tmp;
|
|
if (*buf != ',')
|
|
break;
|
|
buf++;
|
|
} while (1);
|
|
|
|
st_data->nr_taps = i;
|
|
|
|
out:
|
|
spin_unlock_irq(&mcbsp->lock);
|
|
|
|
return size;
|
|
}
|
|
|
|
static DEVICE_ATTR(st_taps, 0644, st_taps_show, st_taps_store);
|
|
|
|
static const struct attribute *sidetone_attrs[] = {
|
|
&dev_attr_st_taps.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group sidetone_attr_group = {
|
|
.attrs = (struct attribute **)sidetone_attrs,
|
|
};
|
|
|
|
static int omap_st_add(struct omap_mcbsp *mcbsp, struct resource *res)
|
|
{
|
|
struct omap_mcbsp_st_data *st_data;
|
|
int err;
|
|
|
|
st_data = devm_kzalloc(mcbsp->dev, sizeof(*mcbsp->st_data), GFP_KERNEL);
|
|
if (!st_data)
|
|
return -ENOMEM;
|
|
|
|
st_data->mcbsp_iclk = clk_get(mcbsp->dev, "ick");
|
|
if (IS_ERR(st_data->mcbsp_iclk)) {
|
|
dev_warn(mcbsp->dev,
|
|
"Failed to get ick, sidetone might be broken\n");
|
|
st_data->mcbsp_iclk = NULL;
|
|
}
|
|
|
|
st_data->io_base_st = devm_ioremap(mcbsp->dev, res->start,
|
|
resource_size(res));
|
|
if (!st_data->io_base_st)
|
|
return -ENOMEM;
|
|
|
|
err = sysfs_create_group(&mcbsp->dev->kobj, &sidetone_attr_group);
|
|
if (err)
|
|
return err;
|
|
|
|
mcbsp->st_data = st_data;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
|
|
* 730 has only 2 McBSP, and both of them are MPU peripherals.
|
|
*/
|
|
int omap_mcbsp_init(struct platform_device *pdev)
|
|
{
|
|
struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
int ret = 0;
|
|
|
|
spin_lock_init(&mcbsp->lock);
|
|
mcbsp->free = true;
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
|
|
if (!res)
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
mcbsp->io_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(mcbsp->io_base))
|
|
return PTR_ERR(mcbsp->io_base);
|
|
|
|
mcbsp->phys_base = res->start;
|
|
mcbsp->reg_cache_size = resource_size(res);
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
|
|
if (!res)
|
|
mcbsp->phys_dma_base = mcbsp->phys_base;
|
|
else
|
|
mcbsp->phys_dma_base = res->start;
|
|
|
|
/*
|
|
* OMAP1, 2 uses two interrupt lines: TX, RX
|
|
* OMAP2430, OMAP3 SoC have combined IRQ line as well.
|
|
* OMAP4 and newer SoC only have the combined IRQ line.
|
|
* Use the combined IRQ if available since it gives better debugging
|
|
* possibilities.
|
|
*/
|
|
mcbsp->irq = platform_get_irq_byname(pdev, "common");
|
|
if (mcbsp->irq == -ENXIO) {
|
|
mcbsp->tx_irq = platform_get_irq_byname(pdev, "tx");
|
|
|
|
if (mcbsp->tx_irq == -ENXIO) {
|
|
mcbsp->irq = platform_get_irq(pdev, 0);
|
|
mcbsp->tx_irq = 0;
|
|
} else {
|
|
mcbsp->rx_irq = platform_get_irq_byname(pdev, "rx");
|
|
mcbsp->irq = 0;
|
|
}
|
|
}
|
|
|
|
if (!pdev->dev.of_node) {
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "invalid tx DMA channel\n");
|
|
return -ENODEV;
|
|
}
|
|
mcbsp->dma_req[0] = res->start;
|
|
mcbsp->dma_data[0].filter_data = &mcbsp->dma_req[0];
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "invalid rx DMA channel\n");
|
|
return -ENODEV;
|
|
}
|
|
mcbsp->dma_req[1] = res->start;
|
|
mcbsp->dma_data[1].filter_data = &mcbsp->dma_req[1];
|
|
} else {
|
|
mcbsp->dma_data[0].filter_data = "tx";
|
|
mcbsp->dma_data[1].filter_data = "rx";
|
|
}
|
|
|
|
mcbsp->dma_data[0].addr = omap_mcbsp_dma_reg_params(mcbsp, 0);
|
|
mcbsp->dma_data[0].maxburst = 4;
|
|
|
|
mcbsp->dma_data[1].addr = omap_mcbsp_dma_reg_params(mcbsp, 1);
|
|
mcbsp->dma_data[1].maxburst = 4;
|
|
|
|
mcbsp->fclk = clk_get(&pdev->dev, "fck");
|
|
if (IS_ERR(mcbsp->fclk)) {
|
|
ret = PTR_ERR(mcbsp->fclk);
|
|
dev_err(mcbsp->dev, "unable to get fck: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
mcbsp->dma_op_mode = MCBSP_DMA_MODE_ELEMENT;
|
|
if (mcbsp->pdata->buffer_size) {
|
|
/*
|
|
* Initially configure the maximum thresholds to a safe value.
|
|
* The McBSP FIFO usage with these values should not go under
|
|
* 16 locations.
|
|
* If the whole FIFO without safety buffer is used, than there
|
|
* is a possibility that the DMA will be not able to push the
|
|
* new data on time, causing channel shifts in runtime.
|
|
*/
|
|
mcbsp->max_tx_thres = max_thres(mcbsp) - 0x10;
|
|
mcbsp->max_rx_thres = max_thres(mcbsp) - 0x10;
|
|
|
|
ret = sysfs_create_group(&mcbsp->dev->kobj,
|
|
&additional_attr_group);
|
|
if (ret) {
|
|
dev_err(mcbsp->dev,
|
|
"Unable to create additional controls\n");
|
|
goto err_thres;
|
|
}
|
|
} else {
|
|
mcbsp->max_tx_thres = -EINVAL;
|
|
mcbsp->max_rx_thres = -EINVAL;
|
|
}
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sidetone");
|
|
if (res) {
|
|
ret = omap_st_add(mcbsp, res);
|
|
if (ret) {
|
|
dev_err(mcbsp->dev,
|
|
"Unable to create sidetone controls\n");
|
|
goto err_st;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_st:
|
|
if (mcbsp->pdata->buffer_size)
|
|
sysfs_remove_group(&mcbsp->dev->kobj, &additional_attr_group);
|
|
err_thres:
|
|
clk_put(mcbsp->fclk);
|
|
return ret;
|
|
}
|
|
|
|
void omap_mcbsp_cleanup(struct omap_mcbsp *mcbsp)
|
|
{
|
|
if (mcbsp->pdata->buffer_size)
|
|
sysfs_remove_group(&mcbsp->dev->kobj, &additional_attr_group);
|
|
|
|
if (mcbsp->st_data) {
|
|
sysfs_remove_group(&mcbsp->dev->kobj, &sidetone_attr_group);
|
|
clk_put(mcbsp->st_data->mcbsp_iclk);
|
|
}
|
|
}
|