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 void 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 } 231 232 static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv) 233 { 234 return firmware_has_feature(FW_FEATURE_PS3_LV1) 235 ? ps3_system_bus_driver_register(drv) 236 : 0; 237 } 238 239 static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv) 240 { 241 if (firmware_has_feature(FW_FEATURE_PS3_LV1)) 242 ps3_system_bus_driver_unregister(drv); 243 } 244 245 MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI); 246 247 static struct ps3_system_bus_driver ps3_ehci_driver = { 248 .core.name = "ps3-ehci-driver", 249 .core.owner = THIS_MODULE, 250 .match_id = PS3_MATCH_ID_EHCI, 251 .probe = ps3_ehci_probe, 252 .remove = ps3_ehci_remove, 253 .shutdown = ps3_ehci_remove, 254 }; 255