Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-omap2/mcbsp.c |
| 3 | * |
| 4 | * Copyright (C) 2008 Instituto Nokia de Tecnologia |
| 5 | * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * Multichannel mode not supported. |
| 12 | */ |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/clk.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/io.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 20 | #include <mach/dma.h> |
| 21 | #include <mach/mux.h> |
| 22 | #include <mach/cpu.h> |
| 23 | #include <mach/mcbsp.h> |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 24 | |
| 25 | struct mcbsp_internal_clk { |
| 26 | struct clk clk; |
| 27 | struct clk **childs; |
| 28 | int n_childs; |
| 29 | }; |
| 30 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame^] | 31 | #if defined(CONFIG_ARCH_OMAP24XX) |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 32 | static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk) |
| 33 | { |
| 34 | const char *clk_names[] = { "mcbsp_ick", "mcbsp_fck" }; |
| 35 | int i; |
| 36 | |
| 37 | mclk->n_childs = ARRAY_SIZE(clk_names); |
| 38 | mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *), |
| 39 | GFP_KERNEL); |
| 40 | |
| 41 | for (i = 0; i < mclk->n_childs; i++) { |
| 42 | /* We fake a platform device to get correct device id */ |
| 43 | struct platform_device pdev; |
| 44 | |
| 45 | pdev.dev.bus = &platform_bus_type; |
| 46 | pdev.id = mclk->clk.id; |
| 47 | mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]); |
| 48 | if (IS_ERR(mclk->childs[i])) |
| 49 | printk(KERN_ERR "Could not get clock %s (%d).\n", |
| 50 | clk_names[i], mclk->clk.id); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | static int omap_mcbsp_clk_enable(struct clk *clk) |
| 55 | { |
| 56 | struct mcbsp_internal_clk *mclk = container_of(clk, |
| 57 | struct mcbsp_internal_clk, clk); |
| 58 | int i; |
| 59 | |
| 60 | for (i = 0; i < mclk->n_childs; i++) |
| 61 | clk_enable(mclk->childs[i]); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static void omap_mcbsp_clk_disable(struct clk *clk) |
| 66 | { |
| 67 | struct mcbsp_internal_clk *mclk = container_of(clk, |
| 68 | struct mcbsp_internal_clk, clk); |
| 69 | int i; |
| 70 | |
| 71 | for (i = 0; i < mclk->n_childs; i++) |
| 72 | clk_disable(mclk->childs[i]); |
| 73 | } |
| 74 | |
| 75 | static struct mcbsp_internal_clk omap_mcbsp_clks[] = { |
| 76 | { |
| 77 | .clk = { |
| 78 | .name = "mcbsp_clk", |
| 79 | .id = 1, |
| 80 | .enable = omap_mcbsp_clk_enable, |
| 81 | .disable = omap_mcbsp_clk_disable, |
| 82 | }, |
| 83 | }, |
| 84 | { |
| 85 | .clk = { |
| 86 | .name = "mcbsp_clk", |
| 87 | .id = 2, |
| 88 | .enable = omap_mcbsp_clk_enable, |
| 89 | .disable = omap_mcbsp_clk_disable, |
| 90 | }, |
| 91 | }, |
| 92 | }; |
| 93 | |
| 94 | #define omap_mcbsp_clks_size ARRAY_SIZE(omap_mcbsp_clks) |
| 95 | #else |
| 96 | #define omap_mcbsp_clks_size 0 |
| 97 | static struct mcbsp_internal_clk __initdata *omap_mcbsp_clks; |
| 98 | static inline void omap_mcbsp_clk_init(struct clk *clk) |
| 99 | { } |
| 100 | #endif |
| 101 | |
| 102 | static void omap2_mcbsp2_mux_setup(void) |
| 103 | { |
| 104 | omap_cfg_reg(Y15_24XX_MCBSP2_CLKX); |
| 105 | omap_cfg_reg(R14_24XX_MCBSP2_FSX); |
| 106 | omap_cfg_reg(W15_24XX_MCBSP2_DR); |
| 107 | omap_cfg_reg(V15_24XX_MCBSP2_DX); |
| 108 | omap_cfg_reg(V14_24XX_GPIO117); |
| 109 | /* |
| 110 | * TODO: Need to add MUX settings for OMAP 2430 SDP |
| 111 | */ |
| 112 | } |
| 113 | |
| 114 | static void omap2_mcbsp_request(unsigned int id) |
| 115 | { |
| 116 | if (cpu_is_omap2420() && (id == OMAP_MCBSP2)) |
| 117 | omap2_mcbsp2_mux_setup(); |
| 118 | } |
| 119 | |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 120 | static struct omap_mcbsp_ops omap2_mcbsp_ops = { |
| 121 | .request = omap2_mcbsp_request, |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | #ifdef CONFIG_ARCH_OMAP24XX |
| 125 | static struct omap_mcbsp_platform_data omap24xx_mcbsp_pdata[] = { |
| 126 | { |
Russell King | 6584690 | 2008-09-03 23:46:18 +0100 | [diff] [blame] | 127 | .phys_base = OMAP24XX_MCBSP1_BASE, |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 128 | .dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX, |
| 129 | .dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX, |
| 130 | .rx_irq = INT_24XX_MCBSP1_IRQ_RX, |
| 131 | .tx_irq = INT_24XX_MCBSP1_IRQ_TX, |
| 132 | .ops = &omap2_mcbsp_ops, |
| 133 | .clk_name = "mcbsp_clk", |
| 134 | }, |
| 135 | { |
Russell King | 6584690 | 2008-09-03 23:46:18 +0100 | [diff] [blame] | 136 | .phys_base = OMAP24XX_MCBSP2_BASE, |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 137 | .dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX, |
| 138 | .dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX, |
| 139 | .rx_irq = INT_24XX_MCBSP2_IRQ_RX, |
| 140 | .tx_irq = INT_24XX_MCBSP2_IRQ_TX, |
| 141 | .ops = &omap2_mcbsp_ops, |
| 142 | .clk_name = "mcbsp_clk", |
| 143 | }, |
| 144 | }; |
| 145 | #define OMAP24XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap24xx_mcbsp_pdata) |
| 146 | #else |
| 147 | #define omap24xx_mcbsp_pdata NULL |
| 148 | #define OMAP24XX_MCBSP_PDATA_SZ 0 |
| 149 | #endif |
| 150 | |
| 151 | #ifdef CONFIG_ARCH_OMAP34XX |
| 152 | static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = { |
| 153 | { |
Russell King | 6584690 | 2008-09-03 23:46:18 +0100 | [diff] [blame] | 154 | .phys_base = OMAP34XX_MCBSP1_BASE, |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 155 | .dma_rx_sync = OMAP24XX_DMA_MCBSP1_RX, |
| 156 | .dma_tx_sync = OMAP24XX_DMA_MCBSP1_TX, |
| 157 | .rx_irq = INT_24XX_MCBSP1_IRQ_RX, |
| 158 | .tx_irq = INT_24XX_MCBSP1_IRQ_TX, |
| 159 | .ops = &omap2_mcbsp_ops, |
| 160 | .clk_name = "mcbsp_clk", |
| 161 | }, |
| 162 | { |
Russell King | 6584690 | 2008-09-03 23:46:18 +0100 | [diff] [blame] | 163 | .phys_base = OMAP34XX_MCBSP2_BASE, |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 164 | .dma_rx_sync = OMAP24XX_DMA_MCBSP2_RX, |
| 165 | .dma_tx_sync = OMAP24XX_DMA_MCBSP2_TX, |
| 166 | .rx_irq = INT_24XX_MCBSP2_IRQ_RX, |
| 167 | .tx_irq = INT_24XX_MCBSP2_IRQ_TX, |
| 168 | .ops = &omap2_mcbsp_ops, |
| 169 | .clk_name = "mcbsp_clk", |
| 170 | }, |
| 171 | }; |
| 172 | #define OMAP34XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap34xx_mcbsp_pdata) |
| 173 | #else |
| 174 | #define omap34xx_mcbsp_pdata NULL |
| 175 | #define OMAP34XX_MCBSP_PDATA_SZ 0 |
| 176 | #endif |
| 177 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame^] | 178 | static int __init omap2_mcbsp_init(void) |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 179 | { |
| 180 | int i; |
| 181 | |
| 182 | for (i = 0; i < omap_mcbsp_clks_size; i++) { |
| 183 | /* Once we call clk_get inside init, we do not register it */ |
| 184 | omap_mcbsp_clk_init(&omap_mcbsp_clks[i]); |
| 185 | clk_register(&omap_mcbsp_clks[i].clk); |
| 186 | } |
| 187 | |
| 188 | if (cpu_is_omap24xx()) |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame^] | 189 | omap_mcbsp_count = OMAP24XX_MCBSP_PDATA_SZ; |
| 190 | if (cpu_is_omap34xx()) |
| 191 | omap_mcbsp_count = OMAP34XX_MCBSP_PDATA_SZ; |
| 192 | |
| 193 | mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *), |
| 194 | GFP_KERNEL); |
| 195 | if (!mcbsp_ptr) |
| 196 | return -ENOMEM; |
| 197 | |
| 198 | if (cpu_is_omap24xx()) |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 199 | omap_mcbsp_register_board_cfg(omap24xx_mcbsp_pdata, |
| 200 | OMAP24XX_MCBSP_PDATA_SZ); |
| 201 | |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 202 | return omap_mcbsp_init(); |
| 203 | } |
| 204 | arch_initcall(omap2_mcbsp_init); |