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 <asm/arch/orion.h> 15 16 #define rdl(off) __raw_readl(hcd->regs + (off)) 17 #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) 18 19 #define USB_CAUSE 0x310 20 #define USB_MASK 0x314 21 #define USB_CMD 0x140 22 #define USB_MODE 0x1a8 23 #define USB_IPG 0x360 24 #define USB_PHY_PWR_CTRL 0x400 25 #define USB_PHY_TX_CTRL 0x420 26 #define USB_PHY_RX_CTRL 0x430 27 #define USB_PHY_IVREF_CTRL 0x440 28 #define USB_PHY_TST_GRP_CTRL 0x450 29 30 /* 31 * Implement Orion USB controller specification guidelines 32 */ 33 static void orion_usb_setup(struct usb_hcd *hcd) 34 { 35 /* 36 * Clear interrupt cause and mask 37 */ 38 wrl(USB_CAUSE, 0); 39 wrl(USB_MASK, 0); 40 41 /* 42 * Reset controller 43 */ 44 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 45 while (rdl(USB_CMD) & 0x2); 46 47 /* 48 * GL# USB-10: Set IPG for non start of frame packets 49 * Bits[14:8]=0xc 50 */ 51 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); 52 53 /* 54 * GL# USB-9: USB 2.0 Power Control 55 * BG_VSEL[7:6]=0x1 56 */ 57 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); 58 59 /* 60 * GL# USB-1: USB PHY Tx Control - force calibration to '8' 61 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 62 */ 63 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); 64 65 /* 66 * GL# USB-3 GL# USB-9: USB PHY Rx Control 67 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, 68 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 69 */ 70 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); 71 72 /* 73 * GL# USB-3 GL# USB-9: USB PHY IVREF Control 74 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 75 */ 76 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); 77 78 /* 79 * GL# USB-3 GL# USB-9: USB PHY Test Group Control 80 * REG_FIFO_SQ_RST[15]=0 81 */ 82 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); 83 84 /* 85 * Stop and reset controller 86 */ 87 wrl(USB_CMD, rdl(USB_CMD) & ~0x1); 88 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 89 while (rdl(USB_CMD) & 0x2); 90 91 /* 92 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 93 * TBD: This need to be done after each reset! 94 * GL# USB-4 Setup USB Host mode 95 */ 96 wrl(USB_MODE, 0x13); 97 } 98 99 static int ehci_orion_setup(struct usb_hcd *hcd) 100 { 101 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 102 int retval; 103 104 retval = ehci_halt(ehci); 105 if (retval) 106 return retval; 107 108 /* 109 * data structure init 110 */ 111 retval = ehci_init(hcd); 112 if (retval) 113 return retval; 114 115 ehci_reset(ehci); 116 ehci_port_power(ehci, 0); 117 118 return retval; 119 } 120 121 static const struct hc_driver ehci_orion_hc_driver = { 122 .description = hcd_name, 123 .product_desc = "Marvell Orion EHCI", 124 .hcd_priv_size = sizeof(struct ehci_hcd), 125 126 /* 127 * generic hardware linkage 128 */ 129 .irq = ehci_irq, 130 .flags = HCD_MEMORY | HCD_USB2, 131 132 /* 133 * basic lifecycle operations 134 */ 135 .reset = ehci_orion_setup, 136 .start = ehci_run, 137 #ifdef CONFIG_PM 138 .suspend = ehci_bus_suspend, 139 .resume = ehci_bus_resume, 140 #endif 141 .stop = ehci_stop, 142 .shutdown = ehci_shutdown, 143 144 /* 145 * managing i/o requests and associated device resources 146 */ 147 .urb_enqueue = ehci_urb_enqueue, 148 .urb_dequeue = ehci_urb_dequeue, 149 .endpoint_disable = ehci_endpoint_disable, 150 151 /* 152 * scheduling support 153 */ 154 .get_frame_number = ehci_get_frame, 155 156 /* 157 * root hub support 158 */ 159 .hub_status_data = ehci_hub_status_data, 160 .hub_control = ehci_hub_control, 161 .bus_suspend = ehci_bus_suspend, 162 .bus_resume = ehci_bus_resume, 163 }; 164 165 static int __init ehci_orion_drv_probe(struct platform_device *pdev) 166 { 167 struct resource *res; 168 struct usb_hcd *hcd; 169 struct ehci_hcd *ehci; 170 void __iomem *regs; 171 int irq, err; 172 173 if (usb_disabled()) 174 return -ENODEV; 175 176 pr_debug("Initializing Orion-SoC USB Host Controller\n"); 177 178 irq = platform_get_irq(pdev, 0); 179 if (irq <= 0) { 180 dev_err(&pdev->dev, 181 "Found HC with no IRQ. Check %s setup!\n", 182 pdev->dev.bus_id); 183 err = -ENODEV; 184 goto err1; 185 } 186 187 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 188 if (!res) { 189 dev_err(&pdev->dev, 190 "Found HC with no register addr. Check %s setup!\n", 191 pdev->dev.bus_id); 192 err = -ENODEV; 193 goto err1; 194 } 195 196 if (!request_mem_region(res->start, res->end - res->start + 1, 197 ehci_orion_hc_driver.description)) { 198 dev_dbg(&pdev->dev, "controller already in use\n"); 199 err = -EBUSY; 200 goto err1; 201 } 202 203 regs = ioremap(res->start, res->end - res->start + 1); 204 if (regs == NULL) { 205 dev_dbg(&pdev->dev, "error mapping memory\n"); 206 err = -EFAULT; 207 goto err2; 208 } 209 210 hcd = usb_create_hcd(&ehci_orion_hc_driver, 211 &pdev->dev, pdev->dev.bus_id); 212 if (!hcd) { 213 err = -ENOMEM; 214 goto err3; 215 } 216 217 hcd->rsrc_start = res->start; 218 hcd->rsrc_len = res->end - res->start + 1; 219 hcd->regs = regs; 220 221 ehci = hcd_to_ehci(hcd); 222 ehci->caps = hcd->regs + 0x100; 223 ehci->regs = hcd->regs + 0x100 + 224 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); 225 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 226 ehci->is_tdi_rh_tt = 1; 227 ehci->sbrn = 0x20; 228 229 /* 230 * setup Orion USB controller 231 */ 232 orion_usb_setup(hcd); 233 234 err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); 235 if (err) 236 goto err4; 237 238 return 0; 239 240 err4: 241 usb_put_hcd(hcd); 242 err3: 243 iounmap(regs); 244 err2: 245 release_mem_region(res->start, res->end - res->start + 1); 246 err1: 247 dev_err(&pdev->dev, "init %s fail, %d\n", 248 pdev->dev.bus_id, err); 249 250 return err; 251 } 252 253 static int __exit ehci_orion_drv_remove(struct platform_device *pdev) 254 { 255 struct usb_hcd *hcd = platform_get_drvdata(pdev); 256 257 usb_remove_hcd(hcd); 258 iounmap(hcd->regs); 259 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 260 usb_put_hcd(hcd); 261 262 return 0; 263 } 264 265 MODULE_ALIAS("platform:orion-ehci"); 266 267 static struct platform_driver ehci_orion_driver = { 268 .probe = ehci_orion_drv_probe, 269 .remove = __exit_p(ehci_orion_drv_remove), 270 .shutdown = usb_hcd_platform_shutdown, 271 .driver.name = "orion-ehci", 272 }; 273