diff options
Diffstat (limited to 'arch/arm/mach-omap1/mcbsp.c')
| -rw-r--r-- | arch/arm/mach-omap1/mcbsp.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/mcbsp.c b/arch/arm/mach-omap1/mcbsp.c new file mode 100644 index 00000000000..2d2c2522b04 --- /dev/null +++ b/arch/arm/mach-omap1/mcbsp.c @@ -0,0 +1,280 @@ +/* + * 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 <asm/arch/dma.h> +#include <asm/arch/mux.h> +#include <asm/arch/cpu.h> +#include <asm/arch/mcbsp.h> +#include <asm/arch/dsp_common.h> + +#define DPS_RSTCT2_PER_EN (1 << 0) +#define DSP_RSTCT2_WD_PER_EN (1 << 1) + +struct mcbsp_internal_clk { + struct clk clk; + struct clk **childs; + int n_childs; +}; + +#if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX) +static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk) +{ + const char *clk_names[] = { "dsp_ck", "api_ck", "dspxor_ck" }; + int i; + + mclk->n_childs = ARRAY_SIZE(clk_names); + mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *), + GFP_KERNEL); + + for (i = 0; i < mclk->n_childs; i++) { + /* We fake a platform device to get correct device id */ + struct platform_device pdev; + + pdev.dev.bus = &platform_bus_type; + pdev.id = mclk->clk.id; + mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]); + if (IS_ERR(mclk->childs[i])) + printk(KERN_ERR "Could not get clock %s (%d).\n", + clk_names[i], mclk->clk.id); + } +} + +static int omap_mcbsp_clk_enable(struct clk *clk) +{ + struct mcbsp_internal_clk *mclk = container_of(clk, + struct mcbsp_internal_clk, clk); + int i; + + for (i = 0; i < mclk->n_childs; i++) + clk_enable(mclk->childs[i]); + return 0; +} + +static void omap_mcbsp_clk_disable(struct clk *clk) +{ + struct mcbsp_internal_clk *mclk = container_of(clk, + struct mcbsp_internal_clk, clk); + int i; + + for (i = 0; i < mclk->n_childs; i++) + clk_disable(mclk->childs[i]); +} + +static struct mcbsp_internal_clk omap_mcbsp_clks[] = { + { + .clk = { + .name = "mcbsp_clk", + .id = 1, + .enable = omap_mcbsp_clk_enable, + .disable = omap_mcbsp_clk_disable, + }, + }, + { + .clk = { + .name = "mcbsp_clk", + .id = 3, + .enable = omap_mcbsp_clk_enable, + .disable = omap_mcbsp_clk_disable, + }, + }, +}; + +#define omap_mcbsp_clks_size ARRAY_SIZE(omap_mcbsp_clks) +#else +#define omap_mcbsp_clks_size 0 +static struct mcbsp_internal_clk __initdata *omap_mcbsp_clks; +static inline void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk) +{ } +#endif + +static int omap1_mcbsp_check(unsigned int id) +{ + /* REVISIT: Check correctly for number of registered McBSPs */ + if (cpu_is_omap730()) { + if (id > OMAP_MAX_MCBSP_COUNT - 2) { + printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", + id + 1); + return -ENODEV; + } + return 0; + } + + if (cpu_is_omap15xx() || cpu_is_omap16xx()) { + if (id > OMAP_MAX_MCBSP_COUNT - 1) { + printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", + id + 1); + return -ENODEV; + } + return 0; + } + + return -ENODEV; +} + +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) { + 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) + omap_dsp_release_mem(); +} + +static struct omap_mcbsp_ops omap1_mcbsp_ops = { + .check = omap1_mcbsp_check, + .request = omap1_mcbsp_request, + .free = omap1_mcbsp_free, +}; + +#ifdef CONFIG_ARCH_OMAP730 +static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = { + { + .virt_base = io_p2v(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, + }, + { + .virt_base = io_p2v(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[] = { + { + .virt_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, + .clk_name = "mcbsp_clk", + }, + { + .virt_base = io_p2v(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, + }, + { + .virt_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, + .clk_name = "mcbsp_clk", + }, +}; +#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[] = { + { + .virt_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, + .clk_name = "mcbsp_clk", + }, + { + .virt_base = io_p2v(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, + }, + { + .virt_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, + .clk_name = "mcbsp_clk", + }, +}; +#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) +{ + int i; + + for (i = 0; i < omap_mcbsp_clks_size; i++) { + if (cpu_is_omap15xx() || cpu_is_omap16xx()) { + omap_mcbsp_clk_init(&omap_mcbsp_clks[i]); + clk_register(&omap_mcbsp_clks[i].clk); + } + } + + 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); |