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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 20 | |
Tony Lindgren | dd7667a | 2009-01-15 13:09:51 +0200 | [diff] [blame] | 21 | #include <mach/irqs.h> |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 22 | #include <plat/dma.h> |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 23 | #include <plat/cpu.h> |
| 24 | #include <plat/mcbsp.h> |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 25 | #include <plat/omap_device.h> |
Kishon Vijay Abraham I | e95496d | 2011-02-24 15:16:54 +0530 | [diff] [blame] | 26 | #include <linux/pm_runtime.h> |
Paul Walmsley | 4814ced | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 27 | |
| 28 | #include "control.h" |
| 29 | |
Paul Walmsley | cf4c87a | 2010-10-08 11:40:19 -0600 | [diff] [blame] | 30 | /* McBSP internal signal muxing functions */ |
| 31 | |
| 32 | void omap2_mcbsp1_mux_clkr_src(u8 mux) |
| 33 | { |
| 34 | u32 v; |
| 35 | |
| 36 | v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); |
| 37 | if (mux == CLKR_SRC_CLKR) |
Jarkko Nikula | 425925d | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 38 | v &= ~OMAP2_MCBSP1_CLKR_MASK; |
Paul Walmsley | cf4c87a | 2010-10-08 11:40:19 -0600 | [diff] [blame] | 39 | else if (mux == CLKR_SRC_CLKX) |
| 40 | v |= OMAP2_MCBSP1_CLKR_MASK; |
| 41 | omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0); |
| 42 | } |
| 43 | EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src); |
| 44 | |
| 45 | void omap2_mcbsp1_mux_fsr_src(u8 mux) |
| 46 | { |
| 47 | u32 v; |
| 48 | |
| 49 | v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); |
| 50 | if (mux == FSR_SRC_FSR) |
Jarkko Nikula | 425925d | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 51 | v &= ~OMAP2_MCBSP1_FSR_MASK; |
Paul Walmsley | cf4c87a | 2010-10-08 11:40:19 -0600 | [diff] [blame] | 52 | else if (mux == FSR_SRC_FSX) |
| 53 | v |= OMAP2_MCBSP1_FSR_MASK; |
| 54 | omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0); |
| 55 | } |
| 56 | EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src); |
| 57 | |
Paul Walmsley | d135865 | 2010-10-08 11:40:19 -0600 | [diff] [blame] | 58 | /* McBSP CLKS source switching function */ |
| 59 | |
| 60 | int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id) |
| 61 | { |
| 62 | struct omap_mcbsp *mcbsp; |
| 63 | struct clk *fck_src; |
| 64 | char *fck_src_name; |
| 65 | int r; |
| 66 | |
| 67 | if (!omap_mcbsp_check_valid_id(id)) { |
| 68 | pr_err("%s: Invalid id (%d)\n", __func__, id + 1); |
| 69 | return -EINVAL; |
| 70 | } |
| 71 | mcbsp = id_to_mcbsp_ptr(id); |
| 72 | |
| 73 | if (fck_src_id == MCBSP_CLKS_PAD_SRC) |
| 74 | fck_src_name = "pad_fck"; |
| 75 | else if (fck_src_id == MCBSP_CLKS_PRCM_SRC) |
| 76 | fck_src_name = "prcm_fck"; |
| 77 | else |
| 78 | return -EINVAL; |
| 79 | |
| 80 | fck_src = clk_get(mcbsp->dev, fck_src_name); |
| 81 | if (IS_ERR_OR_NULL(fck_src)) { |
| 82 | pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks", |
| 83 | fck_src_name); |
| 84 | return -EINVAL; |
| 85 | } |
| 86 | |
Kishon Vijay Abraham I | e95496d | 2011-02-24 15:16:54 +0530 | [diff] [blame] | 87 | pm_runtime_put_sync(mcbsp->dev); |
Paul Walmsley | d135865 | 2010-10-08 11:40:19 -0600 | [diff] [blame] | 88 | |
| 89 | r = clk_set_parent(mcbsp->fclk, fck_src); |
| 90 | if (IS_ERR_VALUE(r)) { |
| 91 | pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n", |
| 92 | "clks", fck_src_name); |
| 93 | clk_put(fck_src); |
| 94 | return -EINVAL; |
| 95 | } |
| 96 | |
Kishon Vijay Abraham I | e95496d | 2011-02-24 15:16:54 +0530 | [diff] [blame] | 97 | pm_runtime_get_sync(mcbsp->dev); |
Paul Walmsley | d135865 | 2010-10-08 11:40:19 -0600 | [diff] [blame] | 98 | |
| 99 | clk_put(fck_src); |
| 100 | |
| 101 | return 0; |
| 102 | } |
| 103 | EXPORT_SYMBOL(omap2_mcbsp_set_clks_src); |
| 104 | |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 105 | struct omap_device_pm_latency omap2_mcbsp_latency[] = { |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 106 | { |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 107 | .deactivate_func = omap_device_idle_hwmods, |
| 108 | .activate_func = omap_device_enable_hwmods, |
| 109 | .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, |
Kishon Vijay Abraham I | 3cf32bb | 2011-02-24 12:51:45 -0800 | [diff] [blame] | 110 | }, |
| 111 | }; |
| 112 | |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 113 | static int omap_init_mcbsp(struct omap_hwmod *oh, void *unused) |
| 114 | { |
| 115 | int id, count = 1; |
| 116 | char *name = "omap-mcbsp"; |
| 117 | struct omap_hwmod *oh_device[2]; |
| 118 | struct omap_mcbsp_platform_data *pdata = NULL; |
| 119 | struct omap_device *od; |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 120 | |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 121 | sscanf(oh->name, "mcbsp%d", &id); |
| 122 | |
| 123 | pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL); |
| 124 | if (!pdata) { |
| 125 | pr_err("%s: No memory for mcbsp\n", __func__); |
| 126 | return -ENOMEM; |
| 127 | } |
| 128 | |
Kishon Vijay Abraham I | 9504ba6 | 2011-02-24 15:16:55 +0530 | [diff] [blame] | 129 | pdata->mcbsp_config_type = oh->class->rev; |
| 130 | |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 131 | if (oh->class->rev == MCBSP_CONFIG_TYPE3) { |
| 132 | if (id == 2) |
| 133 | /* The FIFO has 1024 + 256 locations */ |
| 134 | pdata->buffer_size = 0x500; |
| 135 | else |
| 136 | /* The FIFO has 128 locations */ |
| 137 | pdata->buffer_size = 0x80; |
| 138 | } |
| 139 | |
| 140 | oh_device[0] = oh; |
| 141 | |
| 142 | if (oh->dev_attr) { |
| 143 | oh_device[1] = omap_hwmod_lookup(( |
| 144 | (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone); |
| 145 | count++; |
| 146 | } |
| 147 | od = omap_device_build_ss(name, id, oh_device, count, pdata, |
| 148 | sizeof(*pdata), omap2_mcbsp_latency, |
| 149 | ARRAY_SIZE(omap2_mcbsp_latency), false); |
| 150 | kfree(pdata); |
| 151 | if (IS_ERR(od)) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 152 | pr_err("%s: Can't build omap_device for %s:%s.\n", __func__, |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 153 | name, oh->name); |
| 154 | return PTR_ERR(od); |
| 155 | } |
| 156 | omap_mcbsp_count++; |
| 157 | return 0; |
| 158 | } |
Syed Rafiuddin | a5b92cc | 2009-07-28 18:57:10 +0530 | [diff] [blame] | 159 | |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 160 | static int __init omap2_mcbsp_init(void) |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 161 | { |
Kishon Vijay Abraham I | 64bcbd3 | 2011-02-24 15:16:52 +0530 | [diff] [blame] | 162 | omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL); |
Chandra Shekhar | b4b58f5 | 2008-10-08 10:01:39 +0300 | [diff] [blame] | 163 | |
| 164 | mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *), |
| 165 | GFP_KERNEL); |
| 166 | if (!mcbsp_ptr) |
| 167 | return -ENOMEM; |
| 168 | |
Eduardo Valentin | 78673bc | 2008-07-03 12:24:40 +0300 | [diff] [blame] | 169 | return omap_mcbsp_init(); |
| 170 | } |
| 171 | arch_initcall(omap2_mcbsp_init); |