Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

Linux/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 #include "debug.h"
 51 
 52 static const char dwc2_driver_name[] = "dwc2";
 53 
 54 static const struct dwc2_core_params params_bcm2835 = {
 55         .otg_cap                        = 0,    /* HNP/SRP capable */
 56         .otg_ver                        = 0,    /* 1.3 */
 57         .dma_enable                     = 1,
 58         .dma_desc_enable                = 0,
 59         .speed                          = 0,    /* High Speed */
 60         .enable_dynamic_fifo            = 1,
 61         .en_multiple_tx_fifo            = 1,
 62         .host_rx_fifo_size              = 774,  /* 774 DWORDs */
 63         .host_nperio_tx_fifo_size       = 256,  /* 256 DWORDs */
 64         .host_perio_tx_fifo_size        = 512,  /* 512 DWORDs */
 65         .max_transfer_size              = 65535,
 66         .max_packet_count               = 511,
 67         .host_channels                  = 8,
 68         .phy_type                       = 1,    /* UTMI */
 69         .phy_utmi_width                 = 8,    /* 8 bits */
 70         .phy_ulpi_ddr                   = 0,    /* Single */
 71         .phy_ulpi_ext_vbus              = 0,
 72         .i2c_enable                     = 0,
 73         .ulpi_fs_ls                     = 0,
 74         .host_support_fs_ls_low_power   = 0,
 75         .host_ls_low_power_phy_clk      = 0,    /* 48 MHz */
 76         .ts_dline                       = 0,
 77         .reload_ctl                     = 0,
 78         .ahbcfg                         = 0x10,
 79         .uframe_sched                   = 0,
 80         .external_id_pin_ctl            = -1,
 81         .hibernation                    = -1,
 82 };
 83 
 84 static const struct dwc2_core_params params_rk3066 = {
 85         .otg_cap                        = 2,    /* non-HNP/non-SRP */
 86         .otg_ver                        = -1,
 87         .dma_enable                     = -1,
 88         .dma_desc_enable                = 0,
 89         .speed                          = -1,
 90         .enable_dynamic_fifo            = 1,
 91         .en_multiple_tx_fifo            = -1,
 92         .host_rx_fifo_size              = 520,  /* 520 DWORDs */
 93         .host_nperio_tx_fifo_size       = 128,  /* 128 DWORDs */
 94         .host_perio_tx_fifo_size        = 256,  /* 256 DWORDs */
 95         .max_transfer_size              = 65535,
 96         .max_packet_count               = -1,
 97         .host_channels                  = -1,
 98         .phy_type                       = -1,
 99         .phy_utmi_width                 = -1,
100         .phy_ulpi_ddr                   = -1,
101         .phy_ulpi_ext_vbus              = -1,
102         .i2c_enable                     = -1,
103         .ulpi_fs_ls                     = -1,
104         .host_support_fs_ls_low_power   = -1,
105         .host_ls_low_power_phy_clk      = -1,
106         .ts_dline                       = -1,
107         .reload_ctl                     = -1,
108         .ahbcfg                         = 0x7, /* INCR16 */
109         .uframe_sched                   = -1,
110         .external_id_pin_ctl            = -1,
111         .hibernation                    = -1,
112 };
113 
114 /**
115  * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
116  * DWC_otg driver
117  *
118  * @dev: Platform device
119  *
120  * This routine is called, for example, when the rmmod command is executed. The
121  * device may or may not be electrically present. If it is present, the driver
122  * stops device processing. Any resources used on behalf of this device are
123  * freed.
124  */
125 static int dwc2_driver_remove(struct platform_device *dev)
126 {
127         struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
128 
129         dwc2_debugfs_exit(hsotg);
130         if (hsotg->hcd_enabled)
131                 dwc2_hcd_remove(hsotg);
132         if (hsotg->gadget_enabled)
133                 s3c_hsotg_remove(hsotg);
134 
135         return 0;
136 }
137 
138 static const struct of_device_id dwc2_of_match_table[] = {
139         { .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },
140         { .compatible = "rockchip,rk3066-usb", .data = &params_rk3066 },
141         { .compatible = "snps,dwc2", .data = NULL },
142         { .compatible = "samsung,s3c6400-hsotg", .data = NULL},
143         {},
144 };
145 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
146 
147 /**
148  * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
149  * driver
150  *
151  * @dev: Platform device
152  *
153  * This routine creates the driver components required to control the device
154  * (core, HCD, and PCD) and initializes the device. The driver components are
155  * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
156  * in the device private data. This allows the driver to access the dwc2_hsotg
157  * structure on subsequent calls to driver methods for this device.
158  */
159 static int dwc2_driver_probe(struct platform_device *dev)
160 {
161         const struct of_device_id *match;
162         const struct dwc2_core_params *params;
163         struct dwc2_core_params defparams;
164         struct dwc2_hsotg *hsotg;
165         struct resource *res;
166         struct phy *phy;
167         struct usb_phy *uphy;
168         int retval;
169         int irq;
170 
171         match = of_match_device(dwc2_of_match_table, &dev->dev);
172         if (match && match->data) {
173                 params = match->data;
174         } else {
175                 /* Default all params to autodetect */
176                 dwc2_set_all_params(&defparams, -1);
177                 params = &defparams;
178 
179                 /*
180                  * Disable descriptor dma mode by default as the HW can support
181                  * it, but does not support it for SPLIT transactions.
182                  */
183                 defparams.dma_desc_enable = 0;
184         }
185 
186         hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
187         if (!hsotg)
188                 return -ENOMEM;
189 
190         hsotg->dev = &dev->dev;
191 
192         /*
193          * Use reasonable defaults so platforms don't have to provide these.
194          */
195         if (!dev->dev.dma_mask)
196                 dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
197         retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
198         if (retval)
199                 return retval;
200 
201         irq = platform_get_irq(dev, 0);
202         if (irq < 0) {
203                 dev_err(&dev->dev, "missing IRQ resource\n");
204                 return irq;
205         }
206 
207         dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
208                 irq);
209         retval = devm_request_irq(hsotg->dev, irq,
210                                   dwc2_handle_common_intr, IRQF_SHARED,
211                                   dev_name(hsotg->dev), hsotg);
212         if (retval)
213                 return retval;
214 
215         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
216         hsotg->regs = devm_ioremap_resource(&dev->dev, res);
217         if (IS_ERR(hsotg->regs))
218                 return PTR_ERR(hsotg->regs);
219 
220         dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
221                 (unsigned long)res->start, hsotg->regs);
222 
223         hsotg->dr_mode = of_usb_get_dr_mode(dev->dev.of_node);
224 
225         /*
226          * Attempt to find a generic PHY, then look for an old style
227          * USB PHY
228          */
229         phy = devm_phy_get(&dev->dev, "usb2-phy");
230         if (IS_ERR(phy)) {
231                 hsotg->phy = NULL;
232                 uphy = devm_usb_get_phy(&dev->dev, USB_PHY_TYPE_USB2);
233                 if (IS_ERR(uphy))
234                         hsotg->uphy = NULL;
235                 else
236                         hsotg->uphy = uphy;
237         } else {
238                 hsotg->phy = phy;
239                 phy_power_on(hsotg->phy);
240                 phy_init(hsotg->phy);
241         }
242 
243         spin_lock_init(&hsotg->lock);
244         mutex_init(&hsotg->init_mutex);
245 
246         /* Detect config values from hardware */
247         retval = dwc2_get_hwparams(hsotg);
248         if (retval)
249                 return retval;
250 
251         hsotg->core_params = devm_kzalloc(&dev->dev,
252                                 sizeof(*hsotg->core_params), GFP_KERNEL);
253         if (!hsotg->core_params)
254                 return -ENOMEM;
255 
256         dwc2_set_all_params(hsotg->core_params, -1);
257 
258         /* Validate parameter values */
259         dwc2_set_parameters(hsotg, params);
260 
261         if (hsotg->dr_mode != USB_DR_MODE_HOST) {
262                 retval = dwc2_gadget_init(hsotg, irq);
263                 if (retval)
264                         return retval;
265                 hsotg->gadget_enabled = 1;
266         }
267 
268         if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {
269                 retval = dwc2_hcd_init(hsotg, irq);
270                 if (retval) {
271                         if (hsotg->gadget_enabled)
272                                 s3c_hsotg_remove(hsotg);
273                         return retval;
274                 }
275                 hsotg->hcd_enabled = 1;
276         }
277 
278         platform_set_drvdata(dev, hsotg);
279 
280         dwc2_debugfs_init(hsotg);
281 
282         return retval;
283 }
284 
285 static int __maybe_unused dwc2_suspend(struct device *dev)
286 {
287         struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
288         int ret = 0;
289 
290         if (dwc2_is_device_mode(dwc2)) {
291                 ret = s3c_hsotg_suspend(dwc2);
292         } else {
293                 if (dwc2->lx_state == DWC2_L0)
294                         return 0;
295                 phy_exit(dwc2->phy);
296                 phy_power_off(dwc2->phy);
297 
298         }
299         return ret;
300 }
301 
302 static int __maybe_unused dwc2_resume(struct device *dev)
303 {
304         struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
305         int ret = 0;
306 
307         if (dwc2_is_device_mode(dwc2)) {
308                 ret = s3c_hsotg_resume(dwc2);
309         } else {
310                 phy_power_on(dwc2->phy);
311                 phy_init(dwc2->phy);
312 
313         }
314         return ret;
315 }
316 
317 static const struct dev_pm_ops dwc2_dev_pm_ops = {
318         SET_SYSTEM_SLEEP_PM_OPS(dwc2_suspend, dwc2_resume)
319 };
320 
321 static struct platform_driver dwc2_platform_driver = {
322         .driver = {
323                 .name = dwc2_driver_name,
324                 .of_match_table = dwc2_of_match_table,
325                 .pm = &dwc2_dev_pm_ops,
326         },
327         .probe = dwc2_driver_probe,
328         .remove = dwc2_driver_remove,
329 };
330 
331 module_platform_driver(dwc2_platform_driver);
332 
333 MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
334 MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
335 MODULE_LICENSE("Dual BSD/GPL");
336 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us