diff options
Diffstat (limited to 'kernel/arch/arm/mach-omap1/mcbsp.c')
| -rw-r--r-- | kernel/arch/arm/mach-omap1/mcbsp.c | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap1/mcbsp.c b/kernel/arch/arm/mach-omap1/mcbsp.c new file mode 100644 index 000000000..8ed67f8d1 --- /dev/null +++ b/kernel/arch/arm/mach-omap1/mcbsp.c @@ -0,0 +1,446 @@ +/* + * 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/ioport.h> +#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 <linux/slab.h> + +#include <linux/omap-dma.h> +#include <mach/mux.h> +#include "soc.h" +#include <linux/platform_data/asoc-ti-mcbsp.h> + +#include <mach/irqs.h> + +#include "iomap.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 struct platform_device **omap_mcbsp_devices; + +static void omap1_mcbsp_request(unsigned int id) +{ + /* + * On 1510, 1610 and 1710, McBSP1 and McBSP3 + * are DSP public peripherals. + */ + if (id == 0 || id == 2) { + 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); + + /* + * 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 == 0 || id == 2) { + if (--dsp_use == 0) { + 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, +}; + +#define OMAP7XX_MCBSP1_BASE 0xfffb1000 +#define OMAP7XX_MCBSP2_BASE 0xfffb1800 + +#define OMAP1510_MCBSP1_BASE 0xe1011800 +#define OMAP1510_MCBSP2_BASE 0xfffb1000 +#define OMAP1510_MCBSP3_BASE 0xe1017000 + +#define OMAP1610_MCBSP1_BASE 0xe1011800 +#define OMAP1610_MCBSP2_BASE 0xfffb1000 +#define OMAP1610_MCBSP3_BASE 0xe1017000 + +#if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850) +struct resource omap7xx_mcbsp_res[][6] = { + { + { + .start = OMAP7XX_MCBSP1_BASE, + .end = OMAP7XX_MCBSP1_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_7XX_McBSP1RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_7XX_McBSP1TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 9, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 8, + .flags = IORESOURCE_DMA, + }, + }, + { + { + .start = OMAP7XX_MCBSP2_BASE, + .end = OMAP7XX_MCBSP2_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_7XX_McBSP2RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_7XX_McBSP2TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 11, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 10, + .flags = IORESOURCE_DMA, + }, + }, +}; + +#define omap7xx_mcbsp_res_0 omap7xx_mcbsp_res[0] + +static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = { + { + .ops = &omap1_mcbsp_ops, + }, + { + .ops = &omap1_mcbsp_ops, + }, +}; +#define OMAP7XX_MCBSP_RES_SZ ARRAY_SIZE(omap7xx_mcbsp_res[1]) +#define OMAP7XX_MCBSP_COUNT ARRAY_SIZE(omap7xx_mcbsp_res) +#else +#define omap7xx_mcbsp_res_0 NULL +#define omap7xx_mcbsp_pdata NULL +#define OMAP7XX_MCBSP_RES_SZ 0 +#define OMAP7XX_MCBSP_COUNT 0 +#endif + +#ifdef CONFIG_ARCH_OMAP15XX +struct resource omap15xx_mcbsp_res[][6] = { + { + { + .start = OMAP1510_MCBSP1_BASE, + .end = OMAP1510_MCBSP1_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_McBSP1RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_McBSP1TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 9, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 8, + .flags = IORESOURCE_DMA, + }, + }, + { + { + .start = OMAP1510_MCBSP2_BASE, + .end = OMAP1510_MCBSP2_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_1510_SPI_RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_1510_SPI_TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 17, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 16, + .flags = IORESOURCE_DMA, + }, + }, + { + { + .start = OMAP1510_MCBSP3_BASE, + .end = OMAP1510_MCBSP3_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_McBSP3RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_McBSP3TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 11, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 10, + .flags = IORESOURCE_DMA, + }, + }, +}; + +#define omap15xx_mcbsp_res_0 omap15xx_mcbsp_res[0] + +static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = { + { + .ops = &omap1_mcbsp_ops, + }, + { + .ops = &omap1_mcbsp_ops, + }, + { + .ops = &omap1_mcbsp_ops, + }, +}; +#define OMAP15XX_MCBSP_RES_SZ ARRAY_SIZE(omap15xx_mcbsp_res[1]) +#define OMAP15XX_MCBSP_COUNT ARRAY_SIZE(omap15xx_mcbsp_res) +#else +#define omap15xx_mcbsp_res_0 NULL +#define omap15xx_mcbsp_pdata NULL +#define OMAP15XX_MCBSP_RES_SZ 0 +#define OMAP15XX_MCBSP_COUNT 0 +#endif + +#ifdef CONFIG_ARCH_OMAP16XX +struct resource omap16xx_mcbsp_res[][6] = { + { + { + .start = OMAP1610_MCBSP1_BASE, + .end = OMAP1610_MCBSP1_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_McBSP1RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_McBSP1TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 9, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 8, + .flags = IORESOURCE_DMA, + }, + }, + { + { + .start = OMAP1610_MCBSP2_BASE, + .end = OMAP1610_MCBSP2_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_1610_McBSP2_RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_1610_McBSP2_TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 17, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 16, + .flags = IORESOURCE_DMA, + }, + }, + { + { + .start = OMAP1610_MCBSP3_BASE, + .end = OMAP1610_MCBSP3_BASE + SZ_256, + .flags = IORESOURCE_MEM, + }, + { + .name = "rx", + .start = INT_McBSP3RX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "tx", + .start = INT_McBSP3TX, + .flags = IORESOURCE_IRQ, + }, + { + .name = "rx", + .start = 11, + .flags = IORESOURCE_DMA, + }, + { + .name = "tx", + .start = 10, + .flags = IORESOURCE_DMA, + }, + }, +}; + +#define omap16xx_mcbsp_res_0 omap16xx_mcbsp_res[0] + +static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = { + { + .ops = &omap1_mcbsp_ops, + }, + { + .ops = &omap1_mcbsp_ops, + }, + { + .ops = &omap1_mcbsp_ops, + }, +}; +#define OMAP16XX_MCBSP_RES_SZ ARRAY_SIZE(omap16xx_mcbsp_res[1]) +#define OMAP16XX_MCBSP_COUNT ARRAY_SIZE(omap16xx_mcbsp_res) +#else +#define omap16xx_mcbsp_res_0 NULL +#define omap16xx_mcbsp_pdata NULL +#define OMAP16XX_MCBSP_RES_SZ 0 +#define OMAP16XX_MCBSP_COUNT 0 +#endif + +static void omap_mcbsp_register_board_cfg(struct resource *res, int res_count, + struct omap_mcbsp_platform_data *config, int size) +{ + int i; + + omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *), + GFP_KERNEL); + if (!omap_mcbsp_devices) { + printk(KERN_ERR "Could not register McBSP devices\n"); + return; + } + + for (i = 0; i < size; i++) { + struct platform_device *new_mcbsp; + int ret; + + new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1); + if (!new_mcbsp) + continue; + platform_device_add_resources(new_mcbsp, &res[i * res_count], + res_count); + config[i].reg_size = 2; + config[i].reg_step = 2; + new_mcbsp->dev.platform_data = &config[i]; + ret = platform_device_add(new_mcbsp); + if (ret) { + platform_device_put(new_mcbsp); + continue; + } + omap_mcbsp_devices[i] = new_mcbsp; + } +} + +static int __init omap1_mcbsp_init(void) +{ + if (!cpu_class_is_omap1()) + return -ENODEV; + + if (cpu_is_omap7xx()) + omap_mcbsp_register_board_cfg(omap7xx_mcbsp_res_0, + OMAP7XX_MCBSP_RES_SZ, + omap7xx_mcbsp_pdata, + OMAP7XX_MCBSP_COUNT); + + if (cpu_is_omap15xx()) + omap_mcbsp_register_board_cfg(omap15xx_mcbsp_res_0, + OMAP15XX_MCBSP_RES_SZ, + omap15xx_mcbsp_pdata, + OMAP15XX_MCBSP_COUNT); + + if (cpu_is_omap16xx()) + omap_mcbsp_register_board_cfg(omap16xx_mcbsp_res_0, + OMAP16XX_MCBSP_RES_SZ, + omap16xx_mcbsp_pdata, + OMAP16XX_MCBSP_COUNT); + + return 0; +} + +arch_initcall(omap1_mcbsp_init); |