mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 14:06:43 +07:00
468234984f
Mostly fixes all over which weren't urgent enough for the late -rc cycle. There is a Double Buffering fix for Host Mode TX, a dependency fix for the transceiver driver, some fixes to the error path and a fix for the use of omap_musb_maibox. Other than these fixes, there a removal duplicate headers from the dsps glue layer and removal of redundant assignments in omap2430_probe(). -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJRAqSpAAoJEIaOsuA1yqRE1VEQALCzApuKqj5V3VV3kVQLVdUc Sk6i/EJRxebcV6TjHOqbojISNUURAAGbBx7PSzdFFbZT54jaj0qdZgvUaAhEOQk8 FiJJt1u8qdFoz0MRfHX32HWh3L7M62PXZeDjcAxDE7+1bg/xBqUm1sc3VEq63Qd7 nyq+h7Ov7AxF19gVm5LLjal1qc5BQsUB5Cx2bYOrpnceW7LPCSaJmWQEqP6o97Yi 6seSp4Q4GW5TK7WEKXW8pwLYXxr/1X84dOg+OWcTct3kGrg98rhVfwBBYEbSQI/6 UccWWn65sufym0Gj/CWd6mgTiOdjbBw70P+j3qX+/eZhuv37hNKTaLPTzZhkGyRP +pTs/ROEDGnM3BEMxT3jzg2qFR4F3rU7OP3fa4kuf1iGdbnoJbJV8jI9PElZmI5F bxN0F1v0+7QJUlJ4IcQhTlcT7GYsP+UZDbax18AMApsWqE5TbBtDqPhhHKGfWCkd FnfGTZP8onKjnIan4kdh4usLSzE5+OPCklRAyQQNorZw6t3mgBU3Lr811kXGtg6J GMzvXVQ6QZo5aVxWq3dJ39AQTp/Lrs4QFJRzmt0Krdwm9ND5HbnNSJUPntoeztOx D3GCLbyUmJ/eDY1wk6TZTx3pMdXVy94NdGf/ZRZyST1k/QX5JNU7EfLDqrvQS6Yp mW+nVB7gAOXWzaYir9KL =dDY3 -----END PGP SIGNATURE----- Merge tag 'musb-for-v3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next Felipe writes: usb: musb: patches for v3.9 merge window Mostly fixes all over which weren't urgent enough for the late -rc cycle. There is a Double Buffering fix for Host Mode TX, a dependency fix for the transceiver driver, some fixes to the error path and a fix for the use of omap_musb_maibox. Other than these fixes, there a removal duplicate headers from the dsps glue layer and removal of redundant assignments in omap2430_probe().
798 lines
21 KiB
C
798 lines
21 KiB
C
/*
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* Texas Instruments DSPS platforms "glue layer"
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*
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* Copyright (C) 2012, by Texas Instruments
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*
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* Based on the am35x "glue layer" code.
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*
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* This file is part of the Inventra Controller Driver for Linux.
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*
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* The Inventra Controller Driver for Linux is free software; you
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* can redistribute it and/or modify it under the terms of the GNU
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* General Public License version 2 as published by the Free Software
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* Foundation.
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*
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* The Inventra Controller Driver for Linux is distributed in
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* the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with The Inventra Controller Driver for Linux ; if not,
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* write to the Free Software Foundation, Inc., 59 Temple Place,
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* Suite 330, Boston, MA 02111-1307 USA
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*
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* musb_dsps.c will be a common file for all the TI DSPS platforms
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* such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
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* For now only ti81x is using this and in future davinci.c, am35x.c
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* da8xx.c would be merged to this file after testing.
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/pm_runtime.h>
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#include <linux/module.h>
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#include <linux/usb/nop-usb-xceiv.h>
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#include <linux/platform_data/usb-omap.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include "musb_core.h"
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#ifdef CONFIG_OF
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static const struct of_device_id musb_dsps_of_match[];
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#endif
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/**
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* avoid using musb_readx()/musb_writex() as glue layer should not be
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* dependent on musb core layer symbols.
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*/
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static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
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{ return __raw_readb(addr + offset); }
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static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
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{ return __raw_readl(addr + offset); }
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static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
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{ __raw_writeb(data, addr + offset); }
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static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
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{ __raw_writel(data, addr + offset); }
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/**
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* DSPS musb wrapper register offset.
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* FIXME: This should be expanded to have all the wrapper registers from TI DSPS
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* musb ips.
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*/
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struct dsps_musb_wrapper {
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u16 revision;
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u16 control;
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u16 status;
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u16 eoi;
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u16 epintr_set;
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u16 epintr_clear;
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u16 epintr_status;
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u16 coreintr_set;
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u16 coreintr_clear;
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u16 coreintr_status;
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u16 phy_utmi;
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u16 mode;
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/* bit positions for control */
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unsigned reset:5;
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/* bit positions for interrupt */
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unsigned usb_shift:5;
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u32 usb_mask;
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u32 usb_bitmap;
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unsigned drvvbus:5;
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unsigned txep_shift:5;
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u32 txep_mask;
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u32 txep_bitmap;
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unsigned rxep_shift:5;
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u32 rxep_mask;
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u32 rxep_bitmap;
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/* bit positions for phy_utmi */
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unsigned otg_disable:5;
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/* bit positions for mode */
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unsigned iddig:5;
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/* miscellaneous stuff */
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u32 musb_core_offset;
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u8 poll_seconds;
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/* number of musb instances */
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u8 instances;
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};
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/**
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* DSPS glue structure.
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*/
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struct dsps_glue {
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struct device *dev;
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struct platform_device *musb[2]; /* child musb pdev */
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const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
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struct timer_list timer[2]; /* otg_workaround timer */
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unsigned long last_timer[2]; /* last timer data for each instance */
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u32 __iomem *usb_ctrl[2];
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};
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#define DSPS_AM33XX_CONTROL_MODULE_PHYS_0 0x44e10620
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#define DSPS_AM33XX_CONTROL_MODULE_PHYS_1 0x44e10628
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static const resource_size_t dsps_control_module_phys[] = {
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DSPS_AM33XX_CONTROL_MODULE_PHYS_0,
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DSPS_AM33XX_CONTROL_MODULE_PHYS_1,
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};
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#define USBPHY_CM_PWRDN (1 << 0)
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#define USBPHY_OTG_PWRDN (1 << 1)
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#define USBPHY_OTGVDET_EN (1 << 19)
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#define USBPHY_OTGSESSEND_EN (1 << 20)
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/**
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* musb_dsps_phy_control - phy on/off
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* @glue: struct dsps_glue *
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* @id: musb instance
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* @on: flag for phy to be switched on or off
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*
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* This is to enable the PHY using usb_ctrl register in system control
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* module space.
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*
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* XXX: This function will be removed once we have a seperate driver for
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* control module
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*/
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static void musb_dsps_phy_control(struct dsps_glue *glue, u8 id, u8 on)
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{
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u32 usbphycfg;
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usbphycfg = readl(glue->usb_ctrl[id]);
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if (on) {
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usbphycfg &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
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usbphycfg |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
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} else {
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usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
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}
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writel(usbphycfg, glue->usb_ctrl[id]);
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}
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/**
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* dsps_musb_enable - enable interrupts
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*/
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static void dsps_musb_enable(struct musb *musb)
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{
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struct device *dev = musb->controller;
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struct platform_device *pdev = to_platform_device(dev->parent);
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struct dsps_glue *glue = platform_get_drvdata(pdev);
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const struct dsps_musb_wrapper *wrp = glue->wrp;
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void __iomem *reg_base = musb->ctrl_base;
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u32 epmask, coremask;
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/* Workaround: setup IRQs through both register sets. */
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epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
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((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
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coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
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dsps_writel(reg_base, wrp->epintr_set, epmask);
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dsps_writel(reg_base, wrp->coreintr_set, coremask);
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/* Force the DRVVBUS IRQ so we can start polling for ID change. */
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dsps_writel(reg_base, wrp->coreintr_set,
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(1 << wrp->drvvbus) << wrp->usb_shift);
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}
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/**
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* dsps_musb_disable - disable HDRC and flush interrupts
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*/
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static void dsps_musb_disable(struct musb *musb)
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{
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struct device *dev = musb->controller;
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struct platform_device *pdev = to_platform_device(dev->parent);
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struct dsps_glue *glue = platform_get_drvdata(pdev);
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const struct dsps_musb_wrapper *wrp = glue->wrp;
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void __iomem *reg_base = musb->ctrl_base;
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dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
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dsps_writel(reg_base, wrp->epintr_clear,
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wrp->txep_bitmap | wrp->rxep_bitmap);
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dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
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dsps_writel(reg_base, wrp->eoi, 0);
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}
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static void otg_timer(unsigned long _musb)
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{
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struct musb *musb = (void *)_musb;
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void __iomem *mregs = musb->mregs;
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struct device *dev = musb->controller;
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struct platform_device *pdev = to_platform_device(dev);
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struct dsps_glue *glue = dev_get_drvdata(dev->parent);
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const struct dsps_musb_wrapper *wrp = glue->wrp;
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u8 devctl;
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unsigned long flags;
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/*
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* We poll because DSPS IP's won't expose several OTG-critical
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* status change events (from the transceiver) otherwise.
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*/
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devctl = dsps_readb(mregs, MUSB_DEVCTL);
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dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
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otg_state_string(musb->xceiv->state));
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spin_lock_irqsave(&musb->lock, flags);
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switch (musb->xceiv->state) {
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case OTG_STATE_A_WAIT_BCON:
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devctl &= ~MUSB_DEVCTL_SESSION;
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dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl);
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devctl = dsps_readb(musb->mregs, MUSB_DEVCTL);
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if (devctl & MUSB_DEVCTL_BDEVICE) {
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musb->xceiv->state = OTG_STATE_B_IDLE;
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MUSB_DEV_MODE(musb);
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} else {
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musb->xceiv->state = OTG_STATE_A_IDLE;
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MUSB_HST_MODE(musb);
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}
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break;
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case OTG_STATE_A_WAIT_VFALL:
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musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
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dsps_writel(musb->ctrl_base, wrp->coreintr_set,
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MUSB_INTR_VBUSERROR << wrp->usb_shift);
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break;
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case OTG_STATE_B_IDLE:
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devctl = dsps_readb(mregs, MUSB_DEVCTL);
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if (devctl & MUSB_DEVCTL_BDEVICE)
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mod_timer(&glue->timer[pdev->id],
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jiffies + wrp->poll_seconds * HZ);
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else
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musb->xceiv->state = OTG_STATE_A_IDLE;
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break;
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default:
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break;
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}
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spin_unlock_irqrestore(&musb->lock, flags);
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}
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static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
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{
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struct device *dev = musb->controller;
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struct platform_device *pdev = to_platform_device(dev);
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struct dsps_glue *glue = dev_get_drvdata(dev->parent);
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if (timeout == 0)
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timeout = jiffies + msecs_to_jiffies(3);
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/* Never idle if active, or when VBUS timeout is not set as host */
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if (musb->is_active || (musb->a_wait_bcon == 0 &&
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musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
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dev_dbg(musb->controller, "%s active, deleting timer\n",
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otg_state_string(musb->xceiv->state));
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del_timer(&glue->timer[pdev->id]);
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glue->last_timer[pdev->id] = jiffies;
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return;
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}
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if (time_after(glue->last_timer[pdev->id], timeout) &&
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timer_pending(&glue->timer[pdev->id])) {
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dev_dbg(musb->controller,
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"Longer idle timer already pending, ignoring...\n");
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return;
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}
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glue->last_timer[pdev->id] = timeout;
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dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
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otg_state_string(musb->xceiv->state),
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jiffies_to_msecs(timeout - jiffies));
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mod_timer(&glue->timer[pdev->id], timeout);
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}
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static irqreturn_t dsps_interrupt(int irq, void *hci)
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{
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struct musb *musb = hci;
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void __iomem *reg_base = musb->ctrl_base;
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struct device *dev = musb->controller;
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struct platform_device *pdev = to_platform_device(dev);
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struct dsps_glue *glue = dev_get_drvdata(dev->parent);
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const struct dsps_musb_wrapper *wrp = glue->wrp;
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unsigned long flags;
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irqreturn_t ret = IRQ_NONE;
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u32 epintr, usbintr;
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spin_lock_irqsave(&musb->lock, flags);
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/* Get endpoint interrupts */
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epintr = dsps_readl(reg_base, wrp->epintr_status);
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musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
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musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
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if (epintr)
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dsps_writel(reg_base, wrp->epintr_status, epintr);
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/* Get usb core interrupts */
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usbintr = dsps_readl(reg_base, wrp->coreintr_status);
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if (!usbintr && !epintr)
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goto eoi;
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musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
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if (usbintr)
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dsps_writel(reg_base, wrp->coreintr_status, usbintr);
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dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
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usbintr, epintr);
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/*
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* DRVVBUS IRQs are the only proxy we have (a very poor one!) for
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* DSPS IP's missing ID change IRQ. We need an ID change IRQ to
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* switch appropriately between halves of the OTG state machine.
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* Managing DEVCTL.SESSION per Mentor docs requires that we know its
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* value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set.
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* Also, DRVVBUS pulses for SRP (but not at 5V) ...
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*/
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if (usbintr & MUSB_INTR_BABBLE)
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pr_info("CAUTION: musb: Babble Interrupt Occurred\n");
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if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
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int drvvbus = dsps_readl(reg_base, wrp->status);
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void __iomem *mregs = musb->mregs;
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u8 devctl = dsps_readb(mregs, MUSB_DEVCTL);
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int err;
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err = musb->int_usb & MUSB_INTR_VBUSERROR;
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if (err) {
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/*
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* The Mentor core doesn't debounce VBUS as needed
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* to cope with device connect current spikes. This
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* means it's not uncommon for bus-powered devices
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* to get VBUS errors during enumeration.
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*
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* This is a workaround, but newer RTL from Mentor
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* seems to allow a better one: "re"-starting sessions
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* without waiting for VBUS to stop registering in
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* devctl.
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*/
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musb->int_usb &= ~MUSB_INTR_VBUSERROR;
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musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
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mod_timer(&glue->timer[pdev->id],
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jiffies + wrp->poll_seconds * HZ);
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WARNING("VBUS error workaround (delay coming)\n");
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} else if (drvvbus) {
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musb->is_active = 1;
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MUSB_HST_MODE(musb);
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musb->xceiv->otg->default_a = 1;
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musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
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del_timer(&glue->timer[pdev->id]);
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} else {
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musb->is_active = 0;
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MUSB_DEV_MODE(musb);
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musb->xceiv->otg->default_a = 0;
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musb->xceiv->state = OTG_STATE_B_IDLE;
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}
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/* NOTE: this must complete power-on within 100 ms. */
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dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
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drvvbus ? "on" : "off",
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otg_state_string(musb->xceiv->state),
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err ? " ERROR" : "",
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devctl);
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ret = IRQ_HANDLED;
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}
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if (musb->int_tx || musb->int_rx || musb->int_usb)
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ret |= musb_interrupt(musb);
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eoi:
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/* EOI needs to be written for the IRQ to be re-asserted. */
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if (ret == IRQ_HANDLED || epintr || usbintr)
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dsps_writel(reg_base, wrp->eoi, 1);
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/* Poll for ID change */
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if (musb->xceiv->state == OTG_STATE_B_IDLE)
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mod_timer(&glue->timer[pdev->id],
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jiffies + wrp->poll_seconds * HZ);
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spin_unlock_irqrestore(&musb->lock, flags);
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return ret;
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}
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static int dsps_musb_init(struct musb *musb)
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{
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struct device *dev = musb->controller;
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struct platform_device *pdev = to_platform_device(dev);
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struct dsps_glue *glue = dev_get_drvdata(dev->parent);
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const struct dsps_musb_wrapper *wrp = glue->wrp;
|
|
void __iomem *reg_base = musb->ctrl_base;
|
|
u32 rev, val;
|
|
int status;
|
|
|
|
/* mentor core register starts at offset of 0x400 from musb base */
|
|
musb->mregs += wrp->musb_core_offset;
|
|
|
|
/* NOP driver needs change if supporting dual instance */
|
|
usb_nop_xceiv_register();
|
|
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
|
|
if (IS_ERR_OR_NULL(musb->xceiv))
|
|
return -EPROBE_DEFER;
|
|
|
|
/* Returns zero if e.g. not clocked */
|
|
rev = dsps_readl(reg_base, wrp->revision);
|
|
if (!rev) {
|
|
status = -ENODEV;
|
|
goto err0;
|
|
}
|
|
|
|
setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb);
|
|
|
|
/* Reset the musb */
|
|
dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
|
|
|
|
/* Start the on-chip PHY and its PLL. */
|
|
musb_dsps_phy_control(glue, pdev->id, 1);
|
|
|
|
musb->isr = dsps_interrupt;
|
|
|
|
/* reset the otgdisable bit, needed for host mode to work */
|
|
val = dsps_readl(reg_base, wrp->phy_utmi);
|
|
val &= ~(1 << wrp->otg_disable);
|
|
dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
|
|
|
|
/* clear level interrupt */
|
|
dsps_writel(reg_base, wrp->eoi, 0);
|
|
|
|
return 0;
|
|
err0:
|
|
usb_put_phy(musb->xceiv);
|
|
usb_nop_xceiv_unregister();
|
|
return status;
|
|
}
|
|
|
|
static int dsps_musb_exit(struct musb *musb)
|
|
{
|
|
struct device *dev = musb->controller;
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct dsps_glue *glue = dev_get_drvdata(dev->parent);
|
|
|
|
del_timer_sync(&glue->timer[pdev->id]);
|
|
|
|
/* Shutdown the on-chip PHY and its PLL. */
|
|
musb_dsps_phy_control(glue, pdev->id, 0);
|
|
|
|
/* NOP driver needs change if supporting dual instance */
|
|
usb_put_phy(musb->xceiv);
|
|
usb_nop_xceiv_unregister();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct musb_platform_ops dsps_ops = {
|
|
.init = dsps_musb_init,
|
|
.exit = dsps_musb_exit,
|
|
|
|
.enable = dsps_musb_enable,
|
|
.disable = dsps_musb_disable,
|
|
|
|
.try_idle = dsps_musb_try_idle,
|
|
};
|
|
|
|
static u64 musb_dmamask = DMA_BIT_MASK(32);
|
|
|
|
static int dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
|
|
{
|
|
struct device *dev = glue->dev;
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct musb_hdrc_platform_data *pdata = dev->platform_data;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct musb_hdrc_config *config;
|
|
struct platform_device *musb;
|
|
struct resource *res;
|
|
struct resource resources[2];
|
|
char res_name[11];
|
|
int ret;
|
|
|
|
resources[0].start = dsps_control_module_phys[id];
|
|
resources[0].end = resources[0].start + SZ_4 - 1;
|
|
resources[0].flags = IORESOURCE_MEM;
|
|
|
|
glue->usb_ctrl[id] = devm_request_and_ioremap(&pdev->dev, resources);
|
|
if (glue->usb_ctrl[id] == NULL) {
|
|
dev_err(dev, "Failed to obtain usb_ctrl%d memory\n", id);
|
|
ret = -ENODEV;
|
|
goto err0;
|
|
}
|
|
|
|
/* first resource is for usbss, so start index from 1 */
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1);
|
|
if (!res) {
|
|
dev_err(dev, "failed to get memory for instance %d\n", id);
|
|
ret = -ENODEV;
|
|
goto err0;
|
|
}
|
|
res->parent = NULL;
|
|
resources[0] = *res;
|
|
|
|
/* first resource is for usbss, so start index from 1 */
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1);
|
|
if (!res) {
|
|
dev_err(dev, "failed to get irq for instance %d\n", id);
|
|
ret = -ENODEV;
|
|
goto err0;
|
|
}
|
|
res->parent = NULL;
|
|
resources[1] = *res;
|
|
resources[1].name = "mc";
|
|
|
|
/* allocate the child platform device */
|
|
musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
|
|
if (!musb) {
|
|
dev_err(dev, "failed to allocate musb device\n");
|
|
ret = -ENOMEM;
|
|
goto err0;
|
|
}
|
|
|
|
musb->dev.parent = dev;
|
|
musb->dev.dma_mask = &musb_dmamask;
|
|
musb->dev.coherent_dma_mask = musb_dmamask;
|
|
|
|
glue->musb[id] = musb;
|
|
|
|
ret = platform_device_add_resources(musb, resources, 2);
|
|
if (ret) {
|
|
dev_err(dev, "failed to add resources\n");
|
|
goto err2;
|
|
}
|
|
|
|
if (np) {
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev,
|
|
"failed to allocate musb platfrom data\n");
|
|
ret = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
|
|
if (!config) {
|
|
dev_err(&pdev->dev,
|
|
"failed to allocate musb hdrc config\n");
|
|
goto err2;
|
|
}
|
|
|
|
of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
|
|
of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
|
|
snprintf(res_name, sizeof(res_name), "port%d-mode", id);
|
|
of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
|
|
of_property_read_u32(np, "power", (u32 *)&pdata->power);
|
|
config->multipoint = of_property_read_bool(np, "multipoint");
|
|
|
|
pdata->config = config;
|
|
}
|
|
|
|
pdata->platform_ops = &dsps_ops;
|
|
|
|
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
|
|
if (ret) {
|
|
dev_err(dev, "failed to add platform_data\n");
|
|
goto err2;
|
|
}
|
|
|
|
ret = platform_device_add(musb);
|
|
if (ret) {
|
|
dev_err(dev, "failed to register musb device\n");
|
|
goto err2;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
platform_device_put(musb);
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static int dsps_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
const struct of_device_id *match;
|
|
const struct dsps_musb_wrapper *wrp;
|
|
struct dsps_glue *glue;
|
|
struct resource *iomem;
|
|
int ret, i;
|
|
|
|
match = of_match_node(musb_dsps_of_match, np);
|
|
if (!match) {
|
|
dev_err(&pdev->dev, "fail to get matching of_match struct\n");
|
|
ret = -EINVAL;
|
|
goto err0;
|
|
}
|
|
wrp = match->data;
|
|
|
|
/* allocate glue */
|
|
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
|
|
if (!glue) {
|
|
dev_err(&pdev->dev, "unable to allocate glue memory\n");
|
|
ret = -ENOMEM;
|
|
goto err0;
|
|
}
|
|
|
|
/* get memory resource */
|
|
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!iomem) {
|
|
dev_err(&pdev->dev, "failed to get usbss mem resourse\n");
|
|
ret = -ENODEV;
|
|
goto err1;
|
|
}
|
|
|
|
glue->dev = &pdev->dev;
|
|
|
|
glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
|
|
if (!glue->wrp) {
|
|
dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
platform_set_drvdata(pdev, glue);
|
|
|
|
/* enable the usbss clocks */
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
ret = pm_runtime_get_sync(&pdev->dev);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
|
|
goto err2;
|
|
}
|
|
|
|
/* create the child platform device for all instances of musb */
|
|
for (i = 0; i < wrp->instances ; i++) {
|
|
ret = dsps_create_musb_pdev(glue, i);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "failed to create child pdev\n");
|
|
/* release resources of previously created instances */
|
|
for (i--; i >= 0 ; i--)
|
|
platform_device_unregister(glue->musb[i]);
|
|
goto err3;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err3:
|
|
pm_runtime_put(&pdev->dev);
|
|
err2:
|
|
pm_runtime_disable(&pdev->dev);
|
|
kfree(glue->wrp);
|
|
err1:
|
|
kfree(glue);
|
|
err0:
|
|
return ret;
|
|
}
|
|
static int dsps_remove(struct platform_device *pdev)
|
|
{
|
|
struct dsps_glue *glue = platform_get_drvdata(pdev);
|
|
const struct dsps_musb_wrapper *wrp = glue->wrp;
|
|
int i;
|
|
|
|
/* delete the child platform device */
|
|
for (i = 0; i < wrp->instances ; i++)
|
|
platform_device_unregister(glue->musb[i]);
|
|
|
|
/* disable usbss clocks */
|
|
pm_runtime_put(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
kfree(glue->wrp);
|
|
kfree(glue);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int dsps_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev->parent);
|
|
struct dsps_glue *glue = platform_get_drvdata(pdev);
|
|
const struct dsps_musb_wrapper *wrp = glue->wrp;
|
|
int i;
|
|
|
|
for (i = 0; i < wrp->instances; i++)
|
|
musb_dsps_phy_control(glue, i, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsps_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev->parent);
|
|
struct dsps_glue *glue = platform_get_drvdata(pdev);
|
|
const struct dsps_musb_wrapper *wrp = glue->wrp;
|
|
int i;
|
|
|
|
for (i = 0; i < wrp->instances; i++)
|
|
musb_dsps_phy_control(glue, i, 1);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
|
|
|
|
static const struct dsps_musb_wrapper ti81xx_driver_data = {
|
|
.revision = 0x00,
|
|
.control = 0x14,
|
|
.status = 0x18,
|
|
.eoi = 0x24,
|
|
.epintr_set = 0x38,
|
|
.epintr_clear = 0x40,
|
|
.epintr_status = 0x30,
|
|
.coreintr_set = 0x3c,
|
|
.coreintr_clear = 0x44,
|
|
.coreintr_status = 0x34,
|
|
.phy_utmi = 0xe0,
|
|
.mode = 0xe8,
|
|
.reset = 0,
|
|
.otg_disable = 21,
|
|
.iddig = 8,
|
|
.usb_shift = 0,
|
|
.usb_mask = 0x1ff,
|
|
.usb_bitmap = (0x1ff << 0),
|
|
.drvvbus = 8,
|
|
.txep_shift = 0,
|
|
.txep_mask = 0xffff,
|
|
.txep_bitmap = (0xffff << 0),
|
|
.rxep_shift = 16,
|
|
.rxep_mask = 0xfffe,
|
|
.rxep_bitmap = (0xfffe << 16),
|
|
.musb_core_offset = 0x400,
|
|
.poll_seconds = 2,
|
|
.instances = 1,
|
|
};
|
|
|
|
static const struct platform_device_id musb_dsps_id_table[] = {
|
|
{
|
|
.name = "musb-ti81xx",
|
|
.driver_data = (kernel_ulong_t) &ti81xx_driver_data,
|
|
},
|
|
{ }, /* Terminating Entry */
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id musb_dsps_of_match[] = {
|
|
{ .compatible = "ti,musb-am33xx",
|
|
.data = (void *) &ti81xx_driver_data, },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
|
|
#endif
|
|
|
|
static struct platform_driver dsps_usbss_driver = {
|
|
.probe = dsps_probe,
|
|
.remove = dsps_remove,
|
|
.driver = {
|
|
.name = "musb-dsps",
|
|
.pm = &dsps_pm_ops,
|
|
.of_match_table = of_match_ptr(musb_dsps_of_match),
|
|
},
|
|
.id_table = musb_dsps_id_table,
|
|
};
|
|
|
|
MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
|
|
MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
|
|
MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
static int __init dsps_init(void)
|
|
{
|
|
return platform_driver_register(&dsps_usbss_driver);
|
|
}
|
|
subsys_initcall(dsps_init);
|
|
|
|
static void __exit dsps_exit(void)
|
|
{
|
|
platform_driver_unregister(&dsps_usbss_driver);
|
|
}
|
|
module_exit(dsps_exit);
|