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/*
* linux/arch/arm/mach-omap1/mcbsp.c
*
* Copyright (C) 2008 Instituto Nokia de Tecnologia
* Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
*
* 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.
*
* Multichannel mode not supported.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <mach/irqs.h>
#include <mach/dma.h>
#include <mach/mux.h>
#include <mach/cpu.h>
#include <mach/mcbsp.h>
#include <mach/dsp_common.h>
#define DPS_RSTCT2_PER_EN (1 << 0)
#define DSP_RSTCT2_WD_PER_EN (1 << 1)
static int dsp_use;
static struct clk *api_clk;
static struct clk *dsp_clk;
static void omap1_mcbsp_request(unsigned int id)
{
/*
* On 1510, 1610 and 1710, McBSP1 and McBSP3
* are DSP public peripherals.
*/
if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
if (dsp_use++ == 0) {
api_clk = clk_get(NULL, "api_ck");
dsp_clk = clk_get(NULL, "dsp_ck");
if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
clk_enable(api_clk);
clk_enable(dsp_clk);
omap_dsp_request_mem();
/*
* DSP external peripheral reset
* FIXME: This should be moved to dsp code
*/
__raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
}
}
}
}
static void omap1_mcbsp_free(unsigned int id)
{
if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
if (--dsp_use == 0) {
omap_dsp_release_mem();
if (!IS_ERR(api_clk)) {
clk_disable(api_clk);
clk_put(api_clk);
}
if (!IS_ERR(dsp_clk)) {
clk_disable(dsp_clk);
clk_put(dsp_clk);
}
}
}
}
static struct omap_mcbsp_ops omap1_mcbsp_ops = {
.request = omap1_mcbsp_request,
.free = omap1_mcbsp_free,
};
#ifdef CONFIG_ARCH_OMAP730
static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
{
.phys_base = OMAP730_MCBSP1_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP1_RX,
.dma_tx_sync = OMAP_DMA_MCBSP1_TX,
.rx_irq = INT_730_McBSP1RX,
.tx_irq = INT_730_McBSP1TX,
.ops = &omap1_mcbsp_ops,
},
{
.phys_base = OMAP730_MCBSP2_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP3_RX,
.dma_tx_sync = OMAP_DMA_MCBSP3_TX,
.rx_irq = INT_730_McBSP2RX,
.tx_irq = INT_730_McBSP2TX,
.ops = &omap1_mcbsp_ops,
},
};
#define OMAP730_MCBSP_PDATA_SZ ARRAY_SIZE(omap730_mcbsp_pdata)
#else
#define omap730_mcbsp_pdata NULL
#define OMAP730_MCBSP_PDATA_SZ 0
#endif
#ifdef CONFIG_ARCH_OMAP15XX
static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
{
.phys_base = OMAP1510_MCBSP1_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP1_RX,
.dma_tx_sync = OMAP_DMA_MCBSP1_TX,
.rx_irq = INT_McBSP1RX,
.tx_irq = INT_McBSP1TX,
.ops = &omap1_mcbsp_ops,
},
{
.phys_base = OMAP1510_MCBSP2_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP2_RX,
.dma_tx_sync = OMAP_DMA_MCBSP2_TX,
.rx_irq = INT_1510_SPI_RX,
.tx_irq = INT_1510_SPI_TX,
.ops = &omap1_mcbsp_ops,
},
{
.phys_base = OMAP1510_MCBSP3_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP3_RX,
.dma_tx_sync = OMAP_DMA_MCBSP3_TX,
.rx_irq = INT_McBSP3RX,
.tx_irq = INT_McBSP3TX,
.ops = &omap1_mcbsp_ops,
},
};
#define OMAP15XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap15xx_mcbsp_pdata)
#else
#define omap15xx_mcbsp_pdata NULL
#define OMAP15XX_MCBSP_PDATA_SZ 0
#endif
#ifdef CONFIG_ARCH_OMAP16XX
static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
{
.phys_base = OMAP1610_MCBSP1_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP1_RX,
.dma_tx_sync = OMAP_DMA_MCBSP1_TX,
.rx_irq = INT_McBSP1RX,
.tx_irq = INT_McBSP1TX,
.ops = &omap1_mcbsp_ops,
},
{
.phys_base = OMAP1610_MCBSP2_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP2_RX,
.dma_tx_sync = OMAP_DMA_MCBSP2_TX,
.rx_irq = INT_1610_McBSP2_RX,
.tx_irq = INT_1610_McBSP2_TX,
.ops = &omap1_mcbsp_ops,
},
{
.phys_base = OMAP1610_MCBSP3_BASE,
.dma_rx_sync = OMAP_DMA_MCBSP3_RX,
.dma_tx_sync = OMAP_DMA_MCBSP3_TX,
.rx_irq = INT_McBSP3RX,
.tx_irq = INT_McBSP3TX,
.ops = &omap1_mcbsp_ops,
},
};
#define OMAP16XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap16xx_mcbsp_pdata)
#else
#define omap16xx_mcbsp_pdata NULL
#define OMAP16XX_MCBSP_PDATA_SZ 0
#endif
int __init omap1_mcbsp_init(void)
{
if (cpu_is_omap730())
omap_mcbsp_count = OMAP730_MCBSP_PDATA_SZ;
if (cpu_is_omap15xx())
omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
if (cpu_is_omap16xx())
omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
GFP_KERNEL);
if (!mcbsp_ptr)
return -ENOMEM;
if (cpu_is_omap730())
omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata,
OMAP730_MCBSP_PDATA_SZ);
if (cpu_is_omap15xx())
omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
OMAP15XX_MCBSP_PDATA_SZ);
if (cpu_is_omap16xx())
omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
OMAP16XX_MCBSP_PDATA_SZ);
return omap_mcbsp_init();
}
arch_initcall(omap1_mcbsp_init);
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