1 /* 2 * drivers/usb/host/ehci-orion.c 3 * 4 * Tzachi Perelstein <tzachi@marvell.com> 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include <linux/mbus.h> 15 #include <asm/plat-orion/ehci-orion.h> 16 17 #define rdl(off) __raw_readl(hcd->regs + (off)) 18 #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) 19 20 #define USB_CMD 0x140 21 #define USB_MODE 0x1a8 22 #define USB_CAUSE 0x310 23 #define USB_MASK 0x314 24 #define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4)) 25 #define USB_WINDOW_BASE(i) (0x324 + ((i) << 4)) 26 #define USB_IPG 0x360 27 #define USB_PHY_PWR_CTRL 0x400 28 #define USB_PHY_TX_CTRL 0x420 29 #define USB_PHY_RX_CTRL 0x430 30 #define USB_PHY_IVREF_CTRL 0x440 31 #define USB_PHY_TST_GRP_CTRL 0x450 32 33 /* 34 * Implement Orion USB controller specification guidelines 35 */ 36 static void orion_usb_setup(struct usb_hcd *hcd) 37 { 38 /* 39 * Clear interrupt cause and mask 40 */ 41 wrl(USB_CAUSE, 0); 42 wrl(USB_MASK, 0); 43 44 /* 45 * Reset controller 46 */ 47 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 48 while (rdl(USB_CMD) & 0x2); 49 50 /* 51 * GL# USB-10: Set IPG for non start of frame packets 52 * Bits[14:8]=0xc 53 */ 54 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); 55 56 /* 57 * GL# USB-9: USB 2.0 Power Control 58 * BG_VSEL[7:6]=0x1 59 */ 60 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); 61 62 /* 63 * GL# USB-1: USB PHY Tx Control - force calibration to '8' 64 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 65 */ 66 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); 67 68 /* 69 * GL# USB-3 GL# USB-9: USB PHY Rx Control 70 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, 71 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 72 */ 73 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); 74 75 /* 76 * GL# USB-3 GL# USB-9: USB PHY IVREF Control 77 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 78 */ 79 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); 80 81 /* 82 * GL# USB-3 GL# USB-9: USB PHY Test Group Control 83 * REG_FIFO_SQ_RST[15]=0 84 */ 85 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); 86 87 /* 88 * Stop and reset controller 89 */ 90 wrl(USB_CMD, rdl(USB_CMD) & ~0x1); 91 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 92 while (rdl(USB_CMD) & 0x2); 93 94 /* 95 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 96 * TBD: This need to be done after each reset! 97 * GL# USB-4 Setup USB Host mode 98 */ 99 wrl(USB_MODE, 0x13); 100 } 101 102 static int ehci_orion_setup(struct usb_hcd *hcd) 103 { 104 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 105 int retval; 106 107 retval = ehci_halt(ehci); 108 if (retval) 109 return retval; 110 111 /* 112 * data structure init 113 */ 114 retval = ehci_init(hcd); 115 if (retval) 116 return retval; 117 118 ehci_reset(ehci); 119 ehci_port_power(ehci, 0); 120 121 return retval; 122 } 123 124 static const struct hc_driver ehci_orion_hc_driver = { 125 .description = hcd_name, 126 .product_desc = "Marvell Orion EHCI", 127 .hcd_priv_size = sizeof(struct ehci_hcd), 128 129 /* 130 * generic hardware linkage 131 */ 132 .irq = ehci_irq, 133 .flags = HCD_MEMORY | HCD_USB2, 134 135 /* 136 * basic lifecycle operations 137 */ 138 .reset = ehci_orion_setup, 139 .start = ehci_run, 140 #ifdef CONFIG_PM 141 .suspend = ehci_bus_suspend, 142 .resume = ehci_bus_resume, 143 #endif 144 .stop = ehci_stop, 145 .shutdown = ehci_shutdown, 146 147 /* 148 * managing i/o requests and associated device resources 149 */ 150 .urb_enqueue = ehci_urb_enqueue, 151 .urb_dequeue = ehci_urb_dequeue, 152 .endpoint_disable = ehci_endpoint_disable, 153 154 /* 155 * scheduling support 156 */ 157 .get_frame_number = ehci_get_frame, 158 159 /* 160 * root hub support 161 */ 162 .hub_status_data = ehci_hub_status_data, 163 .hub_control = ehci_hub_control, 164 .bus_suspend = ehci_bus_suspend, 165 .bus_resume = ehci_bus_resume, 166 }; 167 168 static void __init 169 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, 170 struct mbus_dram_target_info *dram) 171 { 172 int i; 173 174 for (i = 0; i < 4; i++) { 175 wrl(USB_WINDOW_CTRL(i), 0); 176 wrl(USB_WINDOW_BASE(i), 0); 177 } 178 179 for (i = 0; i < dram->num_cs; i++) { 180 struct mbus_dram_window *cs = dram->cs + i; 181 182 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | 183 (cs->mbus_attr << 8) | 184 (dram->mbus_dram_target_id << 4) | 1); 185 wrl(USB_WINDOW_BASE(i), cs->base); 186 } 187 } 188 189 static int __init ehci_orion_drv_probe(struct platform_device *pdev) 190 { 191 struct orion_ehci_data *pd = pdev->dev.platform_data; 192 struct resource *res; 193 struct usb_hcd *hcd; 194 struct ehci_hcd *ehci; 195 void __iomem *regs; 196 int irq, err; 197 198 if (usb_disabled()) 199 return -ENODEV; 200 201 pr_debug("Initializing Orion-SoC USB Host Controller\n"); 202 203 irq = platform_get_irq(pdev, 0); 204 if (irq <= 0) { 205 dev_err(&pdev->dev, 206 "Found HC with no IRQ. Check %s setup!\n", 207 pdev->dev.bus_id); 208 err = -ENODEV; 209 goto err1; 210 } 211 212 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 213 if (!res) { 214 dev_err(&pdev->dev, 215 "Found HC with no register addr. Check %s setup!\n", 216 pdev->dev.bus_id); 217 err = -ENODEV; 218 goto err1; 219 } 220 221 if (!request_mem_region(res->start, res->end - res->start + 1, 222 ehci_orion_hc_driver.description)) { 223 dev_dbg(&pdev->dev, "controller already in use\n"); 224 err = -EBUSY; 225 goto err1; 226 } 227 228 regs = ioremap(res->start, res->end - res->start + 1); 229 if (regs == NULL) { 230 dev_dbg(&pdev->dev, "error mapping memory\n"); 231 err = -EFAULT; 232 goto err2; 233 } 234 235 hcd = usb_create_hcd(&ehci_orion_hc_driver, 236 &pdev->dev, pdev->dev.bus_id); 237 if (!hcd) { 238 err = -ENOMEM; 239 goto err3; 240 } 241 242 hcd->rsrc_start = res->start; 243 hcd->rsrc_len = res->end - res->start + 1; 244 hcd->regs = regs; 245 246 ehci = hcd_to_ehci(hcd); 247 ehci->caps = hcd->regs + 0x100; 248 ehci->regs = hcd->regs + 0x100 + 249 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); 250 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 251 ehci->is_tdi_rh_tt = 1; 252 ehci->sbrn = 0x20; 253 254 /* 255 * (Re-)program MBUS remapping windows if we are asked to. 256 */ 257 if (pd != NULL && pd->dram != NULL) 258 ehci_orion_conf_mbus_windows(hcd, pd->dram); 259 260 /* 261 * setup Orion USB controller 262 */ 263 orion_usb_setup(hcd); 264 265 err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); 266 if (err) 267 goto err4; 268 269 return 0; 270 271 err4: 272 usb_put_hcd(hcd); 273 err3: 274 iounmap(regs); 275 err2: 276 release_mem_region(res->start, res->end - res->start + 1); 277 err1: 278 dev_err(&pdev->dev, "init %s fail, %d\n", 279 pdev->dev.bus_id, err); 280 281 return err; 282 } 283 284 static int __exit ehci_orion_drv_remove(struct platform_device *pdev) 285 { 286 struct usb_hcd *hcd = platform_get_drvdata(pdev); 287 288 usb_remove_hcd(hcd); 289 iounmap(hcd->regs); 290 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 291 usb_put_hcd(hcd); 292 293 return 0; 294 } 295 296 MODULE_ALIAS("platform:orion-ehci"); 297 298 static struct platform_driver ehci_orion_driver = { 299 .probe = ehci_orion_drv_probe, 300 .remove = __exit_p(ehci_orion_drv_remove), 301 .shutdown = usb_hcd_platform_shutdown, 302 .driver.name = "orion-ehci", 303 }; 304