drivers/usb/host/ehci-ps3.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  PS3 EHCI Host Controller driver
   4  *
   5  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   6  *  Copyright 2006 Sony Corp.
   7  */
   8
   9 #include <asm/firmware.h>
  10 #include <asm/ps3.h>
  11
  12 static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci)
  13 {
  14         /* PS3 HC internal setup register offsets. */
  15
  16         enum ps3_ehci_hc_insnreg {
  17                 ps3_ehci_hc_insnreg01 = 0x084,
  18                 ps3_ehci_hc_insnreg02 = 0x088,
  19                 ps3_ehci_hc_insnreg03 = 0x08c,
  20         };
  21
  22         /* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its
  23          * internal INSNREGXX setup regs back to the chip default values
  24          * on Host Controller Reset (CMD_RESET) or Light Host Controller
  25          * Reset (CMD_LRESET).  The work-around for this is for the HC
  26          * driver to re-initialise these regs when ever the HC is reset.
  27          */
  28
  29         /* Set burst transfer counts to 256 out, 32 in. */
  30
  31         writel_be(0x01000020, (void __iomem *)ehci->regs +
  32                 ps3_ehci_hc_insnreg01);
  33
  34         /* Enable burst transfer counts. */
  35
  36         writel_be(0x00000001, (void __iomem *)ehci->regs +
  37                 ps3_ehci_hc_insnreg03);
  38 }
  39
  40 static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
  41 {
  42         int result;
  43         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  44
  45         ehci->big_endian_mmio = 1;
  46         ehci->caps = hcd->regs;
  47
  48         result = ehci_setup(hcd);
  49         if (result)
  50                 return result;
  51
  52         ps3_ehci_setup_insnreg(ehci);
  53
  54         return result;
  55 }
  56
  57 static const struct hc_driver ps3_ehci_hc_driver = {
  58         .description            = hcd_name,
  59         .product_desc           = "PS3 EHCI Host Controller",
  60         .hcd_priv_size          = sizeof(struct ehci_hcd),
  61         .irq                    = ehci_irq,
  62         .flags                  = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
  63         .reset                  = ps3_ehci_hc_reset,
  64         .start                  = ehci_run,
  65         .stop                   = ehci_stop,
  66         .shutdown               = ehci_shutdown,
  67         .urb_enqueue            = ehci_urb_enqueue,
  68         .urb_dequeue            = ehci_urb_dequeue,
  69         .endpoint_disable       = ehci_endpoint_disable,
  70         .endpoint_reset         = ehci_endpoint_reset,
  71         .get_frame_number       = ehci_get_frame,
  72         .hub_status_data        = ehci_hub_status_data,
  73         .hub_control            = ehci_hub_control,
  74 #if defined(CONFIG_PM)
  75         .bus_suspend            = ehci_bus_suspend,
  76         .bus_resume             = ehci_bus_resume,
  77 #endif
  78         .relinquish_port        = ehci_relinquish_port,
  79         .port_handed_over       = ehci_port_handed_over,
  80
  81         .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
  82 };
  83
  84 static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
  85 {
  86         int result;
  87         struct usb_hcd *hcd;
  88         unsigned int virq;
  89         static u64 dummy_mask;
  90
  91         if (usb_disabled()) {
  92                 result = -ENODEV;
  93                 goto fail_start;
  94         }
  95
  96         result = ps3_open_hv_device(dev);
  97
  98         if (result) {
  99                 dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
 100                         __func__, __LINE__);
 101                 goto fail_open;
 102         }
 103
 104         result = ps3_dma_region_create(dev->d_region);
 105
 106         if (result) {
 107                 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
 108                         "(%d)\n", __func__, __LINE__, result);
 109                 BUG_ON("check region type");
 110                 goto fail_dma_region;
 111         }
 112
 113         result = ps3_mmio_region_create(dev->m_region);
 114
 115         if (result) {
 116                 dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
 117                         __func__, __LINE__);
 118                 result = -EPERM;
 119                 goto fail_mmio_region;
 120         }
 121
 122         dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
 123                 __LINE__, dev->m_region->lpar_addr);
 124
 125         result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
 126
 127         if (result) {
 128                 dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
 129                         __func__, __LINE__, virq);
 130                 result = -EPERM;
 131                 goto fail_irq;
 132         }
 133
 134         dummy_mask = DMA_BIT_MASK(32);
 135         dev->core.dma_mask = &dummy_mask;
 136         dma_set_coherent_mask(&dev->core, dummy_mask);
 137
 138         hcd = usb_create_hcd(&ps3_ehci_hc_driver, &dev->core, dev_name(&dev->core));
 139
 140         if (!hcd) {
 141                 dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
 142                         __LINE__);
 143                 result = -ENOMEM;
 144                 goto fail_create_hcd;
 145         }
 146
 147         hcd->rsrc_start = dev->m_region->lpar_addr;
 148         hcd->rsrc_len = dev->m_region->len;
 149
 150         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
 151                 dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
 152                         __func__, __LINE__);
 153
 154         hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
 155
 156         if (!hcd->regs) {
 157                 dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
 158                         __LINE__);
 159                 result = -EPERM;
 160                 goto fail_ioremap;
 161         }
 162
 163         dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
 164                 (unsigned long)hcd->rsrc_start);
 165         dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len   %lxh\n", __func__, __LINE__,
 166                 (unsigned long)hcd->rsrc_len);
 167         dev_dbg(&dev->core, "%s:%d: hcd->regs       %lxh\n", __func__, __LINE__,
 168                 (unsigned long)hcd->regs);
 169         dev_dbg(&dev->core, "%s:%d: virq            %lu\n", __func__, __LINE__,
 170                 (unsigned long)virq);
 171
 172         ps3_system_bus_set_drvdata(dev, hcd);
 173
 174         result = usb_add_hcd(hcd, virq, 0);
 175
 176         if (result) {
 177                 dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
 178                         __func__, __LINE__, result);
 179                 goto fail_add_hcd;
 180         }
 181
 182         device_wakeup_enable(hcd->self.controller);
 183         return result;
 184
 185 fail_add_hcd:
 186         iounmap(hcd->regs);
 187 fail_ioremap:
 188         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 189         usb_put_hcd(hcd);
 190 fail_create_hcd:
 191         ps3_io_irq_destroy(virq);
 192 fail_irq:
 193         ps3_free_mmio_region(dev->m_region);
 194 fail_mmio_region:
 195         ps3_dma_region_free(dev->d_region);
 196 fail_dma_region:
 197         ps3_close_hv_device(dev);
 198 fail_open:
 199 fail_start:
 200         return result;
 201 }
 202
 203 static int ps3_ehci_remove(struct ps3_system_bus_device *dev)
 204 {
 205         unsigned int tmp;
 206         struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev);
 207
 208         BUG_ON(!hcd);
 209
 210         dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
 211         dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
 212
 213         tmp = hcd->irq;
 214
 215         usb_remove_hcd(hcd);
 216
 217         ps3_system_bus_set_drvdata(dev, NULL);
 218
 219         BUG_ON(!hcd->regs);
 220         iounmap(hcd->regs);
 221
 222         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 223         usb_put_hcd(hcd);
 224
 225         ps3_io_irq_destroy(tmp);
 226         ps3_free_mmio_region(dev->m_region);
 227
 228         ps3_dma_region_free(dev->d_region);
 229         ps3_close_hv_device(dev);
 230
 231         return 0;
 232 }
 233
 234 static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv)
 235 {
 236         return firmware_has_feature(FW_FEATURE_PS3_LV1)
 237                 ? ps3_system_bus_driver_register(drv)
 238                 : 0;
 239 }
 240
 241 static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv)
 242 {
 243         if (firmware_has_feature(FW_FEATURE_PS3_LV1))
 244                 ps3_system_bus_driver_unregister(drv);
 245 }
 246
 247 MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI);
 248
 249 static struct ps3_system_bus_driver ps3_ehci_driver = {
 250         .core.name = "ps3-ehci-driver",
 251         .core.owner = THIS_MODULE,
 252         .match_id = PS3_MATCH_ID_EHCI,
 253         .probe = ps3_ehci_probe,
 254         .remove = ps3_ehci_remove,
 255         .shutdown = ps3_ehci_remove,
 256 };