drivers/usb/host/ehci1-rockchip.c

   1 /* ehci-msm.c - HSUSB Host Controller Driver Implementation
   2  *
   3  * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
   4  *
   5  * Partly derived from ehci-fsl.c and ehci-hcd.c
   6  * Copyright (c) 2000-2004 by David Brownell
   7  * Copyright (c) 2005 MontaVista Software
   8  *
   9  * All source code in this file is licensed under the following license except
  10  * where indicated.
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License version 2 as published
  14  * by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  19  *
  20  * See the GNU General Public License for more details.
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, you can find it at http://www.fsf.org
  23  */
  24
  25 # include <linux/platform_device.h>
  26 # include <linux/clk.h>
  27 # include <linux/err.h>
  28 # include <linux/device.h>
  29 # include <linux/of.h>
  30 # include <linux/of_platform.h>
  31 # include "ehci.h"
  32 # include "../dwc_otg_310/usbdev_rk.h"
  33
  34 static int rkehci1_status = 1;
  35 static struct ehci_hcd *g_ehci;
  36 #define EHCI1_PRINT(x...)       printk(KERN_INFO "EHCI1: " x)
  37
  38 static void ehci1_rk_port_power(struct ehci_hcd *ehci, int is_on)
  39 {
  40         unsigned port;
  41
  42         if (!HCS_PPC(ehci->hcs_params))
  43                 return;
  44
  45         ehci_dbg(ehci, "...power%s ports...\n", is_on ? "up" : "down");
  46         for (port = HCS_N_PORTS(ehci->hcs_params); port > 0;)
  47                 (void)ehci_hub_control(ehci_to_hcd(ehci),
  48                                        is_on ? SetPortFeature :
  49                                        ClearPortFeature, USB_PORT_FEAT_POWER,
  50                                        port--, NULL, 0);
  51         /* Flush those writes */
  52         ehci_readl(ehci, &ehci->regs->command);
  53         msleep(20);
  54 }
  55
  56 static struct hc_driver rk_ehci1_driver = {
  57         .description = hcd_name,
  58         .product_desc = "Rockchip On-Chip EHCI1 Host Controller",
  59         .hcd_priv_size = sizeof(struct ehci_hcd),
  60
  61         /*
  62          * generic hardware linkage
  63          */
  64         .irq = ehci_irq,
  65         .flags = HCD_USB2 | HCD_MEMORY,
  66
  67         .reset = ehci_init,
  68         .start = ehci_run,
  69
  70         .stop = ehci_stop,
  71         .shutdown = ehci_shutdown,
  72
  73         /*
  74          * managing i/o requests and associated device resources
  75          */
  76         .urb_enqueue = ehci_urb_enqueue,
  77         .urb_dequeue = ehci_urb_dequeue,
  78         .endpoint_disable = ehci_endpoint_disable,
  79         .endpoint_reset = ehci_endpoint_reset,
  80         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
  81
  82         /*
  83          * scheduling support
  84          */
  85         .get_frame_number = ehci_get_frame,
  86
  87         /*
  88          * root hub support
  89          */
  90         .hub_status_data = ehci_hub_status_data,
  91         .hub_control = ehci_hub_control,
  92         .relinquish_port = ehci_relinquish_port,
  93         .port_handed_over = ehci_port_handed_over,
  94
  95         /*
  96          * PM support
  97          */
  98 #ifdef CONFIG_PM
  99         .bus_suspend = ehci_bus_suspend,
 100         .bus_resume = ehci_bus_resume,
 101 #endif
 102 };
 103
 104 static ssize_t ehci1_rk_power_show(struct device *_dev,
 105                                       struct device_attribute *attr, char *buf)
 106 {
 107         return sprintf(buf, "%d\n", rkehci1_status);
 108 }
 109
 110 static ssize_t ehci1_rk_power_store(struct device *_dev,
 111                                        struct device_attribute *attr,
 112                                        const char *buf, size_t count)
 113 {
 114         uint32_t val = simple_strtoul(buf, NULL, 16);
 115         struct usb_hcd *hcd = dev_get_drvdata(_dev);
 116         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 117         struct rkehci_platform_data *pldata = _dev->platform_data;
 118
 119         printk("%s: %d setting to: %d\n", __func__, rkehci1_status, val);
 120         if (val == rkehci1_status)
 121                 goto out;
 122
 123         rkehci1_status = val;
 124         switch (val) {
 125         case 0: /* power down */
 126                 ehci1_rk_port_power(ehci, 0);
 127                 writel_relaxed(0, hcd->regs + 0xb0);
 128                 dsb();
 129                 msleep(5);
 130                 usb_remove_hcd(hcd);
 131                 break;
 132         case 1: /* power on */
 133                 pldata->soft_reset(pldata, RST_POR);
 134                 usb_add_hcd(hcd, hcd->irq, IRQF_DISABLED | IRQF_SHARED);
 135
 136                 ehci1_rk_port_power(ehci, 1);
 137                 writel_relaxed(1, hcd->regs + 0xb0);
 138                 writel_relaxed(0x1d4d, hcd->regs + 0x90);
 139                 writel_relaxed(0x4, hcd->regs + 0xa0);
 140                 dsb();
 141                 break;
 142         default:
 143                 break;
 144         }
 145 out:
 146         return count;
 147 }
 148
 149 static DEVICE_ATTR(ehci1_rk_power, S_IRUGO | S_IWUSR, ehci1_rk_power_show,
 150                    ehci1_rk_power_store);
 151
 152 static ssize_t ehci1_debug_show(struct device *_dev,
 153                                struct device_attribute *attr, char *buf)
 154 {
 155         volatile uint32_t *addr;
 156
 157         EHCI1_PRINT("******** EHCI Capability Registers **********\n");
 158         addr = &g_ehci->caps->hc_capbase;
 159         EHCI1_PRINT("HCIVERSION / CAPLENGTH  @0x%08x:  0x%08x\n",
 160                         (uint32_t) addr, readl_relaxed(addr));
 161         addr = &g_ehci->caps->hcs_params;
 162         EHCI1_PRINT("HCSPARAMS               @0x%08x:  0x%08x\n",
 163                         (uint32_t) addr, readl_relaxed(addr));
 164         addr = &g_ehci->caps->hcc_params;
 165         EHCI1_PRINT("HCCPARAMS               @0x%08x:  0x%08x\n",
 166                         (uint32_t) addr, readl_relaxed(addr));
 167         EHCI1_PRINT("********* EHCI Operational Registers *********\n");
 168         addr = &g_ehci->regs->command;
 169         EHCI1_PRINT("USBCMD                  @0x%08x:  0x%08x\n",
 170                         (uint32_t) addr, readl_relaxed(addr));
 171         addr = &g_ehci->regs->status;
 172         EHCI1_PRINT("USBSTS                  @0x%08x:  0x%08x\n",
 173                         (uint32_t) addr, readl_relaxed(addr));
 174         addr = &g_ehci->regs->intr_enable;
 175         EHCI1_PRINT("USBINTR                 @0x%08x:  0x%08x\n",
 176                         (uint32_t) addr, readl_relaxed(addr));
 177         addr = &g_ehci->regs->frame_index;
 178         EHCI1_PRINT("FRINDEX                 @0x%08x:  0x%08x\n",
 179                         (uint32_t) addr, readl_relaxed(addr));
 180         addr = &g_ehci->regs->segment;
 181         EHCI1_PRINT("CTRLDSSEGMENT           @0x%08x:  0x%08x\n",
 182                         (uint32_t) addr, readl_relaxed(addr));
 183         addr = &g_ehci->regs->frame_list;
 184         EHCI1_PRINT("PERIODICLISTBASE        @0x%08x:  0x%08x\n",
 185                         (uint32_t) addr, readl_relaxed(addr));
 186         addr = &g_ehci->regs->async_next;
 187         EHCI1_PRINT("ASYNCLISTADDR           @0x%08x:  0x%08x\n",
 188                         (uint32_t) addr, readl_relaxed(addr));
 189         addr = &g_ehci->regs->configured_flag;
 190         EHCI1_PRINT("CONFIGFLAG              @0x%08x:  0x%08x\n",
 191                         (uint32_t) addr, readl_relaxed(addr));
 192         addr = g_ehci->regs->port_status;
 193         EHCI1_PRINT("PORTSC                  @0x%08x:  0x%08x\n",
 194                         (uint32_t) addr, readl_relaxed(addr));
 195         return sprintf(buf, "EHCI1 Registers Dump\n");
 196 }
 197
 198 static DEVICE_ATTR(debug_ehci1, S_IRUGO, ehci1_debug_show, NULL);
 199
 200 static struct of_device_id rk_ehci1_of_match[] = {
 201         {
 202          .compatible = "rockchip,rk3188_rk_ehci_host",
 203          .data = &rkehci_pdata_rk3188,
 204          },
 205         {
 206          .compatible = "rockchip,rk3288_rk_ehci1_host",
 207          .data = &rkehci1_pdata_rk3288,
 208          },
 209         {},
 210 };
 211
 212 MODULE_DEVICE_TABLE(of, rk_ehci1_of_match);
 213
 214 static int ehci1_rk_probe(struct platform_device *pdev)
 215 {
 216         struct usb_hcd *hcd;
 217         struct ehci_hcd *ehci;
 218         struct resource *res;
 219         struct device *dev = &pdev->dev;
 220         struct rkehci_platform_data *pldata;
 221         int ret;
 222         int retval = 0;
 223         static u64 usb_dmamask = 0xffffffffUL;
 224         struct device_node *node = pdev->dev.of_node;
 225         const struct of_device_id *match =
 226             of_match_device(of_match_ptr(rk_ehci1_of_match), &pdev->dev);
 227
 228         dev_dbg(&pdev->dev, "ehci1_rk proble\n");
 229
 230         if (match && match->data) {
 231                 dev->platform_data  = (void *)match->data;
 232         } else {
 233                 dev_err(dev, "ehci1_rk match failed\n");
 234                 return -EINVAL;
 235         }
 236
 237         pldata = dev->platform_data;
 238         pldata->dev = dev;
 239
 240         if (!node) {
 241                 dev_err(dev, "device node not found\n");
 242                 return -EINVAL;
 243         }
 244
 245         dev->dma_mask = &usb_dmamask;
 246
 247         retval = device_create_file(dev, &dev_attr_ehci1_rk_power);
 248         retval = device_create_file(dev, &dev_attr_debug_ehci1);
 249         hcd = usb_create_hcd(&rk_ehci1_driver, &pdev->dev, dev_name(&pdev->dev));
 250         if (!hcd) {
 251                 dev_err(&pdev->dev, "Unable to create HCD\n");
 252                 return -ENOMEM;
 253         }
 254
 255         if (pldata->hw_init)
 256                 pldata->hw_init();
 257
 258         if (pldata->clock_init) {
 259                 pldata->clock_init(pldata);
 260                 pldata->clock_enable(pldata, 1);
 261         }
 262
 263         if (pldata->soft_reset)
 264                 pldata->soft_reset(pldata, RST_POR);;
 265
 266         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 267         if (!res) {
 268                 dev_err(&pdev->dev, "Unable to get memory resource\n");
 269                 ret = -ENODEV;
 270                 goto put_hcd;
 271         }
 272
 273         hcd->rsrc_start = res->start;
 274         hcd->rsrc_len = resource_size(res);
 275         hcd->regs = devm_ioremap_resource(dev, res);
 276
 277         if (!hcd->regs) {
 278                 dev_err(&pdev->dev, "ioremap failed\n");
 279                 ret = -ENOMEM;
 280                 goto put_hcd;
 281         }
 282
 283         hcd->irq = platform_get_irq(pdev, 0);
 284         if (hcd->irq < 0) {
 285                 dev_err(&pdev->dev, "Unable to get IRQ resource\n");
 286                 ret = hcd->irq;
 287                 goto put_hcd;
 288         }
 289
 290         ehci = hcd_to_ehci(hcd);
 291         ehci->caps = hcd->regs;
 292         ehci->regs = hcd->regs + 0x10;
 293         printk("%s %p %p\n", __func__, ehci->caps, ehci->regs);
 294
 295         dbg_hcs_params(ehci, "reset");
 296         dbg_hcc_params(ehci, "reset");
 297
 298         ehci->hcs_params = readl(&ehci->caps->hcs_params);
 299
 300         ret = usb_add_hcd(hcd, hcd->irq, IRQF_DISABLED | IRQF_SHARED);
 301         if (ret) {
 302                 dev_err(&pdev->dev, "Failed to add USB HCD\n");
 303                 goto put_hcd;
 304         }
 305
 306         g_ehci = ehci;
 307         ehci1_rk_port_power(ehci, 1);
 308         writel_relaxed(1, hcd->regs + 0xb0);
 309         writel_relaxed(0x1d4d, hcd->regs + 0x90);
 310         writel_relaxed(0x4, hcd->regs + 0xa0);
 311         dsb();
 312
 313         printk("%s ok\n", __func__);
 314
 315         return 0;
 316
 317 put_hcd:
 318         if (pldata->clock_enable)
 319                 pldata->clock_enable(pldata, 0);
 320         usb_put_hcd(hcd);
 321
 322         return ret;
 323 }
 324
 325 static int ehci1_rk_remove(struct platform_device *pdev)
 326 {
 327         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 328
 329         usb_put_hcd(hcd);
 330
 331         return 0;
 332 }
 333
 334 #ifdef CONFIG_PM
 335 static int ehci1_rk_pm_suspend(struct device *dev)
 336 {
 337         struct usb_hcd *hcd = dev_get_drvdata(dev);
 338         bool do_wakeup = device_may_wakeup(dev);
 339         int ret;
 340
 341         dev_dbg(dev, "ehci1-rockchip PM suspend\n");
 342         ret = ehci_suspend(hcd, do_wakeup);
 343
 344         return ret;
 345 }
 346
 347 static int ehci1_rk_pm_resume(struct device *dev)
 348 {
 349         struct usb_hcd *hcd = dev_get_drvdata(dev);
 350
 351         dev_dbg(dev, "ehci1-rockchip PM resume\n");
 352         ehci_resume(hcd, false);
 353
 354         return 0;
 355 }
 356 #else
 357 #define ehci1_rk_pm_suspend     NULL
 358 #define ehci1_rk_pm_resume      NULL
 359 #endif
 360
 361 static const struct dev_pm_ops ehci1_rk_dev_pm_ops = {
 362         .suspend = ehci1_rk_pm_suspend,
 363         .resume = ehci1_rk_pm_resume,
 364 };
 365
 366 static struct platform_driver ehci1_rk_driver = {
 367         .probe = ehci1_rk_probe,
 368         .remove = ehci1_rk_remove,
 369         .driver = {
 370                    .name = "rockchip_ehci1_host",
 371                    .of_match_table = of_match_ptr(rk_ehci1_of_match),
 372 #ifdef CONFIG_PM
 373                    .pm = &ehci1_rk_dev_pm_ops,
 374 #endif
 375                    },
 376 };