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yaml --- r: 100790 b: refs/heads/master c: 78673bc h: refs/heads/master v: v3
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Eduardo Valentin
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Tony Lindgren
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Jul 3, 2008
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 44ec9a3371d5cab323b81c95a4c01d7b5a89cdda | ||
| refs/heads/master: 78673bc898c2db7f4fac4871ec702c3443642308 |
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| /* | ||
| * linux/arch/arm/mach-omap2/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> | ||
|
|
||
| struct mcbsp_internal_clk { | ||
| struct clk clk; | ||
| struct clk **childs; | ||
| int n_childs; | ||
| }; | ||
|
|
||
| #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) | ||
| static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk) | ||
| { | ||
| const char *clk_names[] = { "mcbsp_ick", "mcbsp_fck" }; | ||
| 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 = 2, | ||
| .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 clk *clk) | ||
| { } | ||
| #endif | ||
|
|
||
| static void omap2_mcbsp2_mux_setup(void) | ||
| { | ||
| omap_cfg_reg(Y15_24XX_MCBSP2_CLKX); | ||
| omap_cfg_reg(R14_24XX_MCBSP2_FSX); | ||
| omap_cfg_reg(W15_24XX_MCBSP2_DR); | ||
| omap_cfg_reg(V15_24XX_MCBSP2_DX); | ||
| omap_cfg_reg(V14_24XX_GPIO117); | ||
| /* | ||
| * TODO: Need to add MUX settings for OMAP 2430 SDP | ||
| */ | ||
| } | ||
|
|
||
| static void omap2_mcbsp_request(unsigned int id) | ||
| { | ||
| if (cpu_is_omap2420() && (id == OMAP_MCBSP2)) | ||
| omap2_mcbsp2_mux_setup(); | ||
| } | ||
|
|
||
| static int omap2_mcbsp_check(unsigned int id) | ||
| { | ||
| if (id > OMAP_MAX_MCBSP_COUNT - 1) { | ||
| printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1); | ||
| return -ENODEV; | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| static struct omap_mcbsp_ops omap2_mcbsp_ops = { | ||
| .request = omap2_mcbsp_request, | ||
| .check = omap2_mcbsp_check, | ||
| }; | ||
|
|
||
| #ifdef CONFIG_ARCH_OMAP24XX | ||
| static struct omap_mcbsp_platform_data omap24xx_mcbsp_pdata[] = { | ||
| { | ||
| .virt_base = IO_ADDRESS(OMAP24XX_MCBSP1_BASE), | ||
| .dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX, | ||
| .dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX, | ||
| .rx_irq = INT_24XX_MCBSP1_IRQ_RX, | ||
| .tx_irq = INT_24XX_MCBSP1_IRQ_TX, | ||
| .ops = &omap2_mcbsp_ops, | ||
| .clk_name = "mcbsp_clk", | ||
| }, | ||
| { | ||
| .virt_base = IO_ADDRESS(OMAP24XX_MCBSP2_BASE), | ||
| .dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX, | ||
| .dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX, | ||
| .rx_irq = INT_24XX_MCBSP2_IRQ_RX, | ||
| .tx_irq = INT_24XX_MCBSP2_IRQ_TX, | ||
| .ops = &omap2_mcbsp_ops, | ||
| .clk_name = "mcbsp_clk", | ||
| }, | ||
| }; | ||
| #define OMAP24XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap24xx_mcbsp_pdata) | ||
| #else | ||
| #define omap24xx_mcbsp_pdata NULL | ||
| #define OMAP24XX_MCBSP_PDATA_SZ 0 | ||
| #endif | ||
|
|
||
| #ifdef CONFIG_ARCH_OMAP34XX | ||
| static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { | ||
| { | ||
| .virt_base = IO_ADDRESS(OMAP34XX_MCBSP1_BASE), | ||
| .dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX, | ||
| .dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX, | ||
| .rx_irq = INT_24XX_MCBSP1_IRQ_RX, | ||
| .tx_irq = INT_24XX_MCBSP1_IRQ_TX, | ||
| .ops = &omap2_mcbsp_ops, | ||
| .clk_name = "mcbsp_clk", | ||
| }, | ||
| { | ||
| .virt_base = IO_ADDRESS(OMAP34XX_MCBSP2_BASE), | ||
| .dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX, | ||
| .dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX, | ||
| .rx_irq = INT_24XX_MCBSP2_IRQ_RX, | ||
| .tx_irq = INT_24XX_MCBSP2_IRQ_TX, | ||
| .ops = &omap2_mcbsp_ops, | ||
| .clk_name = "mcbsp_clk", | ||
| }, | ||
| }; | ||
| #define OMAP34XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap34xx_mcbsp_pdata) | ||
| #else | ||
| #define omap34xx_mcbsp_pdata NULL | ||
| #define OMAP34XX_MCBSP_PDATA_SZ 0 | ||
| #endif | ||
|
|
||
| int __init omap2_mcbsp_init(void) | ||
| { | ||
| int i; | ||
|
|
||
| for (i = 0; i < omap_mcbsp_clks_size; i++) { | ||
| /* Once we call clk_get inside init, we do not register it */ | ||
| omap_mcbsp_clk_init(&omap_mcbsp_clks[i]); | ||
| clk_register(&omap_mcbsp_clks[i].clk); | ||
| } | ||
|
|
||
| if (cpu_is_omap24xx()) | ||
| omap_mcbsp_register_board_cfg(omap24xx_mcbsp_pdata, | ||
| OMAP24XX_MCBSP_PDATA_SZ); | ||
|
|
||
| if (cpu_is_omap34xx()) | ||
| omap_mcbsp_register_board_cfg(omap34xx_mcbsp_pdata, | ||
| OMAP34XX_MCBSP_PDATA_SZ); | ||
|
|
||
| return omap_mcbsp_init(); | ||
| } | ||
| arch_initcall(omap2_mcbsp_init); |