/arch/arm/mach-omap1/mcbsp.c
https://github.com/AICP/kernel_asus_grouper · C · 410 lines · 366 code · 24 blank · 20 comment · 27 complexity · d9f1585979959eb786528b38b8ae9970 MD5 · raw file
- /*
- * 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 <mach/irqs.h>
- #include <plat/dma.h>
- #include <plat/mux.h>
- #include <plat/cpu.h>
- #include <plat/mcbsp.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 == 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,
- };
- #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 = OMAP_DMA_MCBSP1_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP1_TX,
- .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 = OMAP_DMA_MCBSP3_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP3_TX,
- .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 = OMAP_DMA_MCBSP1_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP1_TX,
- .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 = OMAP_DMA_MCBSP2_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP2_TX,
- .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 = OMAP_DMA_MCBSP3_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP3_TX,
- .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 = OMAP_DMA_MCBSP1_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP1_TX,
- .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 = OMAP_DMA_MCBSP2_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP2_TX,
- .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 = OMAP_DMA_MCBSP3_RX,
- .flags = IORESOURCE_DMA,
- },
- {
- .name = "tx",
- .start = OMAP_DMA_MCBSP3_TX,
- .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 int __init omap1_mcbsp_init(void)
- {
- if (!cpu_class_is_omap1())
- return -ENODEV;
- if (cpu_is_omap7xx())
- omap_mcbsp_count = OMAP7XX_MCBSP_COUNT;
- else if (cpu_is_omap15xx())
- omap_mcbsp_count = OMAP15XX_MCBSP_COUNT;
- else if (cpu_is_omap16xx())
- omap_mcbsp_count = OMAP16XX_MCBSP_COUNT;
- mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
- GFP_KERNEL);
- if (!mcbsp_ptr)
- return -ENOMEM;
- 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 omap_mcbsp_init();
- }
- arch_initcall(omap1_mcbsp_init);