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/of.h> 19 #include <linux/platform_device.h> 20 #include <linux/slab.h> 21 #include <linux/platform_data/asoc-ti-mcbsp.h> 22 #include <linux/pm_runtime.h> 23 24 #include <linux/omap-dma.h> 25 26 #include "soc.h" 27 #include "omap_device.h" 28 #include "clock.h" 29 30 /* 31 * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle. 32 * Sidetone needs non-gated ICLK and sidetone autoidle is broken. 33 */ 34 #include "cm3xxx.h" 35 #include "cm-regbits-34xx.h" 36 37 static int omap3_mcbsp_force_ick_on(struct clk *clk, bool force_on) 38 { 39 if (!clk) 40 return 0; 41 42 if (force_on) 43 return omap2_clk_deny_idle(clk); 44 else 45 return omap2_clk_allow_idle(clk); 46 } 47 48 void __init omap3_mcbsp_init_pdata_callback( 49 struct omap_mcbsp_platform_data *pdata) 50 { 51 if (!pdata) 52 return; 53 54 pdata->force_ick_on = omap3_mcbsp_force_ick_on; 55 } 56 57 static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused) 58 { 59 int id, count = 1; 60 char *name = "omap-mcbsp"; 61 struct omap_hwmod *oh_device[2]; 62 struct omap_mcbsp_platform_data *pdata = NULL; 63 struct platform_device *pdev; 64 65 sscanf(oh->name, "mcbsp%d", &id); 66 67 pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL); 68 if (!pdata) { 69 pr_err("%s: No memory for mcbsp\n", __func__); 70 return -ENOMEM; 71 } 72 73 pdata->reg_step = 4; 74 if (oh->class->rev < MCBSP_CONFIG_TYPE2) { 75 pdata->reg_size = 2; 76 } else { 77 pdata->reg_size = 4; 78 pdata->has_ccr = true; 79 } 80 81 if (oh->class->rev == MCBSP_CONFIG_TYPE2) { 82 /* The FIFO has 128 locations */ 83 pdata->buffer_size = 0x80; 84 } else if (oh->class->rev == MCBSP_CONFIG_TYPE3) { 85 if (id == 2) 86 /* The FIFO has 1024 + 256 locations */ 87 pdata->buffer_size = 0x500; 88 else 89 /* The FIFO has 128 locations */ 90 pdata->buffer_size = 0x80; 91 } else if (oh->class->rev == MCBSP_CONFIG_TYPE4) { 92 /* The FIFO has 128 locations for all instances */ 93 pdata->buffer_size = 0x80; 94 } 95 96 if (oh->class->rev >= MCBSP_CONFIG_TYPE3) 97 pdata->has_wakeup = true; 98 99 oh_device[0] = oh; 100 101 if (oh->dev_attr) { 102 oh_device[1] = omap_hwmod_lookup(( 103 (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone); 104 pdata->force_ick_on = omap3_mcbsp_force_ick_on; 105 count++; 106 } 107 pdev = omap_device_build_ss(name, id, oh_device, count, pdata, 108 sizeof(*pdata)); 109 kfree(pdata); 110 if (IS_ERR(pdev)) { 111 pr_err("%s: Can't build omap_device for %s:%s.\n", __func__, 112 name, oh->name); 113 return PTR_ERR(pdev); 114 } 115 return 0; 116 } 117 118 static int __init omap2_mcbsp_init(void) 119 { 120 if (!of_have_populated_dt()) 121 omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL); 122 123 return 0; 124 } 125 omap_arch_initcall(omap2_mcbsp_init); 126