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 <plat/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 */ 36static void orion_usb_phy_v1_setup(struct usb_hcd *hcd) 37{ 38 /* The below GLs are according to the Orion Errata document */ 39 /* 40 * Clear interrupt cause and mask 41 */ 42 wrl(USB_CAUSE, 0); 43 wrl(USB_MASK, 0); 44 45 /* 46 * Reset controller 47 */ 48 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 49 while (rdl(USB_CMD) & 0x2); 50 51 /* 52 * GL# USB-10: Set IPG for non start of frame packets 53 * Bits[14:8]=0xc 54 */ 55 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); 56 57 /* 58 * GL# USB-9: USB 2.0 Power Control 59 * BG_VSEL[7:6]=0x1 60 */ 61 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); 62 63 /* 64 * GL# USB-1: USB PHY Tx Control - force calibration to '8' 65 * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 66 */ 67 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); 68 69 /* 70 * GL# USB-3 GL# USB-9: USB PHY Rx Control 71 * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, 72 * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 73 */ 74 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); 75 76 /* 77 * GL# USB-3 GL# USB-9: USB PHY IVREF Control 78 * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 79 */ 80 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); 81 82 /* 83 * GL# USB-3 GL# USB-9: USB PHY Test Group Control 84 * REG_FIFO_SQ_RST[15]=0 85 */ 86 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); 87 88 /* 89 * Stop and reset controller 90 */ 91 wrl(USB_CMD, rdl(USB_CMD) & ~0x1); 92 wrl(USB_CMD, rdl(USB_CMD) | 0x2); 93 while (rdl(USB_CMD) & 0x2); 94 95 /* 96 * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 97 * TBD: This need to be done after each reset! 98 * GL# USB-4 Setup USB Host mode 99 */ 100 wrl(USB_MODE, 0x13); 101} 102 103static int ehci_orion_setup(struct usb_hcd *hcd) 104{ 105 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 106 int retval; 107 108 ehci_reset(ehci); 109 retval = ehci_halt(ehci); 110 if (retval) 111 return retval; 112 113 /* 114 * data structure init 115 */ 116 retval = ehci_init(hcd); 117 if (retval) 118 return retval; 119 120 hcd->has_tt = 1; 121 122 ehci_port_power(ehci, 0); 123 124 return retval; 125} 126 127static const struct hc_driver ehci_orion_hc_driver = { 128 .description = hcd_name, 129 .product_desc = "Marvell Orion EHCI", 130 .hcd_priv_size = sizeof(struct ehci_hcd), 131 132 /* 133 * generic hardware linkage 134 */ 135 .irq = ehci_irq, 136 .flags = HCD_MEMORY | HCD_USB2, 137 138 /* 139 * basic lifecycle operations 140 */ 141 .reset = ehci_orion_setup, 142 .start = ehci_run, 143 .stop = ehci_stop, 144 .shutdown = ehci_shutdown, 145 146 /* 147 * managing i/o requests and associated device resources 148 */ 149 .urb_enqueue = ehci_urb_enqueue, 150 .urb_dequeue = ehci_urb_dequeue, 151 .endpoint_disable = ehci_endpoint_disable, 152 .endpoint_reset = ehci_endpoint_reset, 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 .relinquish_port = ehci_relinquish_port, 167 .port_handed_over = ehci_port_handed_over, 168 169 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 170}; 171 172static void __init 173ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, 174 struct mbus_dram_target_info *dram) 175{ 176 int i; 177 178 for (i = 0; i < 4; i++) { 179 wrl(USB_WINDOW_CTRL(i), 0); 180 wrl(USB_WINDOW_BASE(i), 0); 181 } 182 183 for (i = 0; i < dram->num_cs; i++) { 184 struct mbus_dram_window *cs = dram->cs + i; 185 186 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | 187 (cs->mbus_attr << 8) | 188 (dram->mbus_dram_target_id << 4) | 1); 189 wrl(USB_WINDOW_BASE(i), cs->base); 190 } 191} 192 193static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) 194{ 195 struct orion_ehci_data *pd = pdev->dev.platform_data; 196 struct resource *res; 197 struct usb_hcd *hcd; 198 struct ehci_hcd *ehci; 199 void __iomem *regs; 200 int irq, err; 201 202 if (usb_disabled()) 203 return -ENODEV; 204 205 pr_debug("Initializing Orion-SoC USB Host Controller\n"); 206 207 irq = platform_get_irq(pdev, 0); 208 if (irq <= 0) { 209 dev_err(&pdev->dev, 210 "Found HC with no IRQ. Check %s setup!\n", 211 dev_name(&pdev->dev)); 212 err = -ENODEV; 213 goto err1; 214 } 215 216 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 217 if (!res) { 218 dev_err(&pdev->dev, 219 "Found HC with no register addr. Check %s setup!\n", 220 dev_name(&pdev->dev)); 221 err = -ENODEV; 222 goto err1; 223 } 224 225 if (!request_mem_region(res->start, resource_size(res), 226 ehci_orion_hc_driver.description)) { 227 dev_dbg(&pdev->dev, "controller already in use\n"); 228 err = -EBUSY; 229 goto err1; 230 } 231 232 regs = ioremap(res->start, resource_size(res)); 233 if (regs == NULL) { 234 dev_dbg(&pdev->dev, "error mapping memory\n"); 235 err = -EFAULT; 236 goto err2; 237 } 238 239 hcd = usb_create_hcd(&ehci_orion_hc_driver, 240 &pdev->dev, dev_name(&pdev->dev)); 241 if (!hcd) { 242 err = -ENOMEM; 243 goto err3; 244 } 245 246 hcd->rsrc_start = res->start; 247 hcd->rsrc_len = resource_size(res); 248 hcd->regs = regs; 249 250 ehci = hcd_to_ehci(hcd); 251 ehci->caps = hcd->regs + 0x100; 252 ehci->regs = hcd->regs + 0x100 + 253 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); 254 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 255 hcd->has_tt = 1; 256 ehci->sbrn = 0x20; 257 258 /* 259 * (Re-)program MBUS remapping windows if we are asked to. 260 */ 261 if (pd != NULL && pd->dram != NULL) 262 ehci_orion_conf_mbus_windows(hcd, pd->dram); 263 264 /* 265 * setup Orion USB controller. 266 */ 267 switch (pd->phy_version) { 268 case EHCI_PHY_NA: /* dont change USB phy settings */ 269 break; 270 case EHCI_PHY_ORION: 271 orion_usb_phy_v1_setup(hcd); 272 break; 273 case EHCI_PHY_DD: 274 case EHCI_PHY_KW: 275 default: 276 printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n"); 277 } 278 279 err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); 280 if (err) 281 goto err4; 282 283 return 0; 284 285err4: 286 usb_put_hcd(hcd); 287err3: 288 iounmap(regs); 289err2: 290 release_mem_region(res->start, resource_size(res)); 291err1: 292 dev_err(&pdev->dev, "init %s fail, %d\n", 293 dev_name(&pdev->dev), err); 294 295 return err; 296} 297 298static int __exit ehci_orion_drv_remove(struct platform_device *pdev) 299{ 300 struct usb_hcd *hcd = platform_get_drvdata(pdev); 301 302 usb_remove_hcd(hcd); 303 iounmap(hcd->regs); 304 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 305 usb_put_hcd(hcd); 306 307 return 0; 308} 309 310MODULE_ALIAS("platform:orion-ehci"); 311 312static struct platform_driver ehci_orion_driver = { 313 .probe = ehci_orion_drv_probe, 314 .remove = __exit_p(ehci_orion_drv_remove), 315 .shutdown = usb_hcd_platform_shutdown, 316 .driver.name = "orion-ehci", 317}; 318