| /* |
| * 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/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include <linux/platform_data/asoc-ti-mcbsp.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <linux/omap-dma.h> |
| |
| #include "soc.h" |
| #include "omap_device.h" |
| |
| /* |
| * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle. |
| * Sidetone needs non-gated ICLK and sidetone autoidle is broken. |
| */ |
| #include "cm3xxx.h" |
| #include "cm-regbits-34xx.h" |
| |
| static int omap3_enable_st_clock(unsigned int id, bool enable) |
| { |
| unsigned int w; |
| |
| /* |
| * Sidetone uses McBSP ICLK - which must not idle when sidetones |
| * are enabled or sidetones start sounding ugly. |
| */ |
| w = omap2_cm_read_mod_reg(OMAP3430_PER_MOD, CM_AUTOIDLE); |
| if (enable) |
| w &= ~(1 << (id - 2)); |
| else |
| w |= 1 << (id - 2); |
| omap2_cm_write_mod_reg(w, OMAP3430_PER_MOD, CM_AUTOIDLE); |
| |
| return 0; |
| } |
| |
| static int __init omap_init_mcbsp(struct omap_hwmod *oh, void *unused) |
| { |
| int id, count = 1; |
| char *name = "omap-mcbsp"; |
| struct omap_hwmod *oh_device[2]; |
| struct omap_mcbsp_platform_data *pdata = NULL; |
| struct platform_device *pdev; |
| |
| sscanf(oh->name, "mcbsp%d", &id); |
| |
| pdata = kzalloc(sizeof(struct omap_mcbsp_platform_data), GFP_KERNEL); |
| if (!pdata) { |
| pr_err("%s: No memory for mcbsp\n", __func__); |
| return -ENOMEM; |
| } |
| |
| pdata->reg_step = 4; |
| if (oh->class->rev < MCBSP_CONFIG_TYPE2) { |
| pdata->reg_size = 2; |
| } else { |
| pdata->reg_size = 4; |
| pdata->has_ccr = true; |
| } |
| |
| if (oh->class->rev == MCBSP_CONFIG_TYPE2) { |
| /* The FIFO has 128 locations */ |
| pdata->buffer_size = 0x80; |
| } else if (oh->class->rev == MCBSP_CONFIG_TYPE3) { |
| if (id == 2) |
| /* The FIFO has 1024 + 256 locations */ |
| pdata->buffer_size = 0x500; |
| else |
| /* The FIFO has 128 locations */ |
| pdata->buffer_size = 0x80; |
| } else if (oh->class->rev == MCBSP_CONFIG_TYPE4) { |
| /* The FIFO has 128 locations for all instances */ |
| pdata->buffer_size = 0x80; |
| } |
| |
| if (oh->class->rev >= MCBSP_CONFIG_TYPE3) |
| pdata->has_wakeup = true; |
| |
| oh_device[0] = oh; |
| |
| if (oh->dev_attr) { |
| oh_device[1] = omap_hwmod_lookup(( |
| (struct omap_mcbsp_dev_attr *)(oh->dev_attr))->sidetone); |
| pdata->enable_st_clock = omap3_enable_st_clock; |
| count++; |
| } |
| pdev = omap_device_build_ss(name, id, oh_device, count, pdata, |
| sizeof(*pdata), NULL, 0, false); |
| kfree(pdata); |
| if (IS_ERR(pdev)) { |
| pr_err("%s: Can't build omap_device for %s:%s.\n", __func__, |
| name, oh->name); |
| return PTR_ERR(pdev); |
| } |
| return 0; |
| } |
| |
| static int __init omap2_mcbsp_init(void) |
| { |
| if (!of_have_populated_dt()) |
| omap_hwmod_for_each_by_class("mcbsp", omap_init_mcbsp, NULL); |
| |
| return 0; |
| } |
| omap_arch_initcall(omap2_mcbsp_init); |