target/linux/brcm63xx/patches-3.13/108-MIPS-BCM63XX-add-support-for-the-on-chip-EHCI-contro.patch

   1 From e38f13bd6408769c0b565bb1079024f496eee121 Mon Sep 17 00:00:00 2001
   2 From: Florian Fainelli <florian@openwrt.org>
   3 Date: Mon, 28 Jan 2013 20:06:27 +0100
   4 Subject: [PATCH 09/11] MIPS: BCM63XX: add support for the on-chip EHCI
   5  controller
   6
   7 Broadcom BCM63XX SoCs include an on-chip EHCI controller which can be
   8 driven by the generic ehci-platform driver by using specific power
   9 on/off/suspend callbacks to manage clocks and hardware specific
  10 configuration.
  11
  12 Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
  13 Signed-off-by: Florian Fainelli <florian@openwrt.org>
  14 ---
  15  arch/mips/bcm63xx/Makefile                         |    2 +-
  16  arch/mips/bcm63xx/dev-usb-ehci.c                   |   92 ++++++++++++++++++++
  17  .../asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h        |    6 ++
  18  3 files changed, 99 insertions(+), 1 deletion(-)
  19  create mode 100644 arch/mips/bcm63xx/dev-usb-ehci.c
  20  create mode 100644 arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h
  21
  22 --- a/arch/mips/bcm63xx/Makefile
  23 +++ b/arch/mips/bcm63xx/Makefile
  24 @@ -1,7 +1,8 @@
  25  obj-y          += clk.o cpu.o cs.o gpio.o irq.o nvram.o prom.o reset.o \
  26                    setup.o timer.o dev-dsp.o dev-enet.o dev-flash.o \
  27                    dev-pcmcia.o dev-rng.o dev-spi.o dev-hsspi.o dev-uart.o \
  28 -                  dev-wdt.o dev-usb-ohci.o dev-usb-usbd.o usb-common.o
  29 +                  dev-wdt.o dev-usb-ehci.o dev-usb-ohci.o dev-usb-usbd.o \
  30 +                  usb-common.o
  31  obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
  32
  33  obj-y          += boards/
  34 --- /dev/null
  35 +++ b/arch/mips/bcm63xx/dev-usb-ehci.c
  36 @@ -0,0 +1,92 @@
  37 +/*
  38 + * This file is subject to the terms and conditions of the GNU General Public
  39 + * License.  See the file "COPYING" in the main directory of this archive
  40 + * for more details.
  41 + *
  42 + * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
  43 + * Copyright (C) 2013 Florian Fainelli <florian@openwrt.org>
  44 + */
  45 +
  46 +#include <linux/init.h>
  47 +#include <linux/kernel.h>
  48 +#include <linux/platform_device.h>
  49 +#include <linux/clk.h>
  50 +#include <linux/delay.h>
  51 +#include <linux/usb/ehci_pdriver.h>
  52 +#include <linux/dma-mapping.h>
  53 +
  54 +#include <bcm63xx_cpu.h>
  55 +#include <bcm63xx_regs.h>
  56 +#include <bcm63xx_io.h>
  57 +#include <bcm63xx_usb_priv.h>
  58 +#include <bcm63xx_dev_usb_ehci.h>
  59 +
  60 +static struct resource ehci_resources[] = {
  61 +       {
  62 +               .start          = -1, /* filled at runtime */
  63 +               .end            = -1, /* filled at runtime */
  64 +               .flags          = IORESOURCE_MEM,
  65 +       },
  66 +       {
  67 +               .start          = -1, /* filled at runtime */
  68 +               .flags          = IORESOURCE_IRQ,
  69 +       },
  70 +};
  71 +
  72 +static u64 ehci_dmamask = DMA_BIT_MASK(32);
  73 +
  74 +static struct clk *usb_host_clock;
  75 +
  76 +static int bcm63xx_ehci_power_on(struct platform_device *pdev)
  77 +{
  78 +       usb_host_clock = clk_get(&pdev->dev, "usbh");
  79 +       if (IS_ERR_OR_NULL(usb_host_clock))
  80 +               return -ENODEV;
  81 +
  82 +       clk_prepare_enable(usb_host_clock);
  83 +
  84 +       bcm63xx_usb_priv_ehci_cfg_set();
  85 +
  86 +       return 0;
  87 +}
  88 +
  89 +static void bcm63xx_ehci_power_off(struct platform_device *pdev)
  90 +{
  91 +       if (!IS_ERR_OR_NULL(usb_host_clock)) {
  92 +               clk_disable_unprepare(usb_host_clock);
  93 +               clk_put(usb_host_clock);
  94 +       }
  95 +}
  96 +
  97 +static struct usb_ehci_pdata bcm63xx_ehci_pdata = {
  98 +       .big_endian_desc        = 1,
  99 +       .big_endian_mmio        = 1,
 100 +       .power_on               = bcm63xx_ehci_power_on,
 101 +       .power_off              = bcm63xx_ehci_power_off,
 102 +       .power_suspend          = bcm63xx_ehci_power_off,
 103 +};
 104 +
 105 +static struct platform_device bcm63xx_ehci_device = {
 106 +       .name           = "ehci-platform",
 107 +       .id             = -1,
 108 +       .num_resources  = ARRAY_SIZE(ehci_resources),
 109 +       .resource       = ehci_resources,
 110 +       .dev            = {
 111 +               .platform_data          = &bcm63xx_ehci_pdata,
 112 +               .dma_mask               = &ehci_dmamask,
 113 +               .coherent_dma_mask      = DMA_BIT_MASK(32),
 114 +       },
 115 +};
 116 +
 117 +int __init bcm63xx_ehci_register(void)
 118 +{
 119 +       if (!BCMCPU_IS_6328() && !BCMCPU_IS_6358() && !BCMCPU_IS_6362() && !BCMCPU_IS_6368())
 120 +               return 0;
 121 +
 122 +       ehci_resources[0].start = bcm63xx_regset_address(RSET_EHCI0);
 123 +       ehci_resources[0].end = ehci_resources[0].start;
 124 +       ehci_resources[0].end += RSET_EHCI_SIZE - 1;
 125 +       ehci_resources[1].start = bcm63xx_get_irq_number(IRQ_EHCI0);
 126 +
 127 +       return platform_device_register(&bcm63xx_ehci_device);
 128 +}
 129 --- /dev/null
 130 +++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_usb_ehci.h
 131 @@ -0,0 +1,6 @@
 132 +#ifndef BCM63XX_DEV_USB_EHCI_H_
 133 +#define BCM63XX_DEV_USB_EHCI_H_
 134 +
 135 +int bcm63xx_ehci_register(void);
 136 +
 137 +#endif /* BCM63XX_DEV_USB_EHCI_H_ */