drivers/usb/dwc2/platform.c

   1 /*
   2  * platform.c - DesignWare HS OTG Controller platform driver
   3  *
   4  * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer,
  11  *    without modification.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The names of the above-listed copyright holders may not be used
  16  *    to endorse or promote products derived from this software without
  17  *    specific prior written permission.
  18  *
  19  * ALTERNATIVELY, this software may be distributed under the terms of the
  20  * GNU General Public License ("GPL") as published by the Free Software
  21  * Foundation; either version 2 of the License, or (at your option) any
  22  * later version.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  25  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  28  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  30  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  31  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  33  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/slab.h>
  40 #include <linux/device.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/of_device.h>
  43 #include <linux/mutex.h>
  44 #include <linux/platform_device.h>
  45
  46 #include <linux/usb/of.h>
  47
  48 #include "core.h"
  49 #include "hcd.h"
  50
  51 static const char dwc2_driver_name[] = "dwc2";
  52
  53 static const struct dwc2_core_params params_bcm2835 = {
  54         .otg_cap                        = 0,    /* HNP/SRP capable */
  55         .otg_ver                        = 0,    /* 1.3 */
  56         .dma_enable                     = 1,
  57         .dma_desc_enable                = 0,
  58         .speed                          = 0,    /* High Speed */
  59         .enable_dynamic_fifo            = 1,
  60         .en_multiple_tx_fifo            = 1,
  61         .host_rx_fifo_size              = 774,  /* 774 DWORDs */
  62         .host_nperio_tx_fifo_size       = 256,  /* 256 DWORDs */
  63         .host_perio_tx_fifo_size        = 512,  /* 512 DWORDs */
  64         .max_transfer_size              = 65535,
  65         .max_packet_count               = 511,
  66         .host_channels                  = 8,
  67         .phy_type                       = 1,    /* UTMI */
  68         .phy_utmi_width                 = 8,    /* 8 bits */
  69         .phy_ulpi_ddr                   = 0,    /* Single */
  70         .phy_ulpi_ext_vbus              = 0,
  71         .i2c_enable                     = 0,
  72         .ulpi_fs_ls                     = 0,
  73         .host_support_fs_ls_low_power   = 0,
  74         .host_ls_low_power_phy_clk      = 0,    /* 48 MHz */
  75         .ts_dline                       = 0,
  76         .reload_ctl                     = 0,
  77         .ahbcfg                         = 0x10,
  78         .uframe_sched                   = 0,
  79 };
  80
  81 static const struct dwc2_core_params params_rk3066 = {
  82         .otg_cap                        = 2,    /* non-HNP/non-SRP */
  83         .otg_ver                        = -1,
  84         .dma_enable                     = -1,
  85         .dma_desc_enable                = 0,
  86         .speed                          = -1,
  87         .enable_dynamic_fifo            = 1,
  88         .en_multiple_tx_fifo            = -1,
  89         .host_rx_fifo_size              = 520,  /* 520 DWORDs */
  90         .host_nperio_tx_fifo_size       = 128,  /* 128 DWORDs */
  91         .host_perio_tx_fifo_size        = 256,  /* 256 DWORDs */
  92         .max_transfer_size              = 65535,
  93         .max_packet_count               = -1,
  94         .host_channels                  = -1,
  95         .phy_type                       = -1,
  96         .phy_utmi_width                 = -1,
  97         .phy_ulpi_ddr                   = -1,
  98         .phy_ulpi_ext_vbus              = -1,
  99         .i2c_enable                     = -1,
 100         .ulpi_fs_ls                     = -1,
 101         .host_support_fs_ls_low_power   = -1,
 102         .host_ls_low_power_phy_clk      = -1,
 103         .ts_dline                       = -1,
 104         .reload_ctl                     = -1,
 105         .ahbcfg                         = 0x7, /* INCR16 */
 106         .uframe_sched                   = -1,
 107 };
 108
 109 /**
 110  * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
 111  * DWC_otg driver
 112  *
 113  * @dev: Platform device
 114  *
 115  * This routine is called, for example, when the rmmod command is executed. The
 116  * device may or may not be electrically present. If it is present, the driver
 117  * stops device processing. Any resources used on behalf of this device are
 118  * freed.
 119  */
 120 static int dwc2_driver_remove(struct platform_device *dev)
 121 {
 122         struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
 123
 124         dwc2_hcd_remove(hsotg);
 125         s3c_hsotg_remove(hsotg);
 126
 127         return 0;
 128 }
 129
 130 static const struct of_device_id dwc2_of_match_table[] = {
 131         { .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
 132         { .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
 133         { .compatible = "snps,dwc2", .data = NULL },
 134         { .compatible = "samsung,s3c6400-hsotg", .data = NULL},
 135         {},
 136 };
 137 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
 138
 139 /**
 140  * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
 141  * driver
 142  *
 143  * @dev: Platform device
 144  *
 145  * This routine creates the driver components required to control the device
 146  * (core, HCD, and PCD) and initializes the device. The driver components are
 147  * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
 148  * in the device private data. This allows the driver to access the dwc2_hsotg
 149  * structure on subsequent calls to driver methods for this device.
 150  */
 151 static int dwc2_driver_probe(struct platform_device *dev)
 152 {
 153         const struct of_device_id *match;
 154         const struct dwc2_core_params *params;
 155         struct dwc2_core_params defparams;
 156         struct dwc2_hsotg *hsotg;
 157         struct resource *res;
 158         struct phy *phy;
 159         struct usb_phy *uphy;
 160         int retval;
 161         int irq;
 162
 163         match = of_match_device(dwc2_of_match_table, &dev->dev);
 164         if (match && match->data) {
 165                 params = match->data;
 166         } else {
 167                 /* Default all params to autodetect */
 168                 dwc2_set_all_params(&defparams, -1);
 169                 params = &defparams;
 170
 171                 /*
 172                  * Disable descriptor dma mode by default as the HW can support
 173                  * it, but does not support it for SPLIT transactions.
 174                  */
 175                 defparams.dma_desc_enable = 0;
 176         }
 177
 178         hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
 179         if (!hsotg)
 180                 return -ENOMEM;
 181
 182         hsotg->dev = &dev->dev;
 183
 184         /*
 185          * Use reasonable defaults so platforms don't have to provide these.
 186          */
 187         if (!dev->dev.dma_mask)
 188                 dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
 189         retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
 190         if (retval)
 191                 return retval;
 192
 193         irq = platform_get_irq(dev, 0);
 194         if (irq < 0) {
 195                 dev_err(&dev->dev, "missing IRQ resource\n");
 196                 return irq;
 197         }
 198
 199         dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
 200                 irq);
 201         retval = devm_request_irq(hsotg->dev, irq,
 202                                   dwc2_handle_common_intr, IRQF_SHARED,
 203                                   dev_name(hsotg->dev), hsotg);
 204         if (retval)
 205                 return retval;
 206
 207         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 208         hsotg->regs = devm_ioremap_resource(&dev->dev, res);
 209         if (IS_ERR(hsotg->regs))
 210                 return PTR_ERR(hsotg->regs);
 211
 212         dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
 213                 (unsigned long)res->start, hsotg->regs);
 214
 215         hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
 216
 217         /*
 218          * Attempt to find a generic PHY, then look for an old style
 219          * USB PHY
 220          */
 221         phy = devm_phy_get(&dev->dev, "usb2-phy");
 222         if (IS_ERR(phy)) {
 223                 hsotg->phy = NULL;
 224                 uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
 225                 if (IS_ERR(uphy))
 226                         hsotg->uphy = NULL;
 227                 else
 228                         hsotg->uphy = uphy;
 229         } else {
 230                 hsotg->phy = phy;
 231                 phy_power_on(hsotg->phy);
 232                 phy_init(hsotg->phy);
 233         }
 234
 235         spin_lock_init(&hsotg->lock);
 236         mutex_init(&hsotg->init_mutex);
 237         retval = dwc2_gadget_init(hsotg, irq);
 238         if (retval)
 239                 return retval;
 240         retval = dwc2_hcd_init(hsotg, irq, params);
 241         if (retval)
 242                 return retval;
 243
 244         platform_set_drvdata(dev, hsotg);
 245
 246         return retval;
 247 }
 248
 249 static int __maybe_unused dwc2_suspend(struct device *dev)
 250 {
 251         struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
 252         int ret = 0;
 253
 254         if (dwc2_is_device_mode(dwc2)) {
 255                 ret = s3c_hsotg_suspend(dwc2);
 256         } else {
 257                 if (dwc2->lx_state == DWC2_L0)
 258                         return 0;
 259                 phy_exit(dwc2->phy);
 260                 phy_power_off(dwc2->phy);
 261
 262         }
 263         return ret;
 264 }
 265
 266 static int __maybe_unused dwc2_resume(struct device *dev)
 267 {
 268         struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
 269         int ret = 0;
 270
 271         if (dwc2_is_device_mode(dwc2)) {
 272                 ret = s3c_hsotg_resume(dwc2);
 273         } else {
 274                 phy_power_on(dwc2->phy);
 275                 phy_init(dwc2->phy);
 276
 277         }
 278         return ret;
 279 }
 280
 281 static const struct dev_pm_ops dwc2_dev_pm_ops = {
 282         SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend, dwc2_resume)
 283 };
 284
 285 static struct platform_driver dwc2_platform_driver = {
 286         .driver = {
 287                 .name = dwc2_driver_name,
 288                 .of_match_table = dwc2_of_match_table,
 289                 .pm = &dwc2_dev_pm_ops,
 290         },
 291         .probe = dwc2_driver_probe,
 292         .remove = dwc2_driver_remove,
 293 };
 294
 295 module_platform_driver(dwc2_platform_driver);
 296
 297 MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
 298 MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
 299 MODULE_LICENSE("Dual BSD/GPL");