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 */
orion_usb_phy_v1_setup(struct usb_hcd * hcd)36 static 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
ehci_orion_setup(struct usb_hcd * hcd)103 static int ehci_orion_setup(struct usb_hcd *hcd)
104 {
105 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
106 int retval;
107
108 retval = ehci_halt(ehci);
109 if (retval)
110 return retval;
111
112 /*
113 * data structure init
114 */
115 retval = ehci_init(hcd);
116 if (retval)
117 return retval;
118
119 hcd->has_tt = 1;
120
121 ehci_reset(ehci);
122 ehci_port_power(ehci, 0);
123
124 return retval;
125 }
126
127 static 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
153 /*
154 * scheduling support
155 */
156 .get_frame_number = ehci_get_frame,
157
158 /*
159 * root hub support
160 */
161 .hub_status_data = ehci_hub_status_data,
162 .hub_control = ehci_hub_control,
163 .bus_suspend = ehci_bus_suspend,
164 .bus_resume = ehci_bus_resume,
165 .relinquish_port = ehci_relinquish_port,
166 .port_handed_over = ehci_port_handed_over,
167 };
168
169 static void __init
ehci_orion_conf_mbus_windows(struct usb_hcd * hcd,struct mbus_dram_target_info * dram)170 ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
171 struct mbus_dram_target_info *dram)
172 {
173 int i;
174
175 for (i = 0; i < 4; i++) {
176 wrl(USB_WINDOW_CTRL(i), 0);
177 wrl(USB_WINDOW_BASE(i), 0);
178 }
179
180 for (i = 0; i < dram->num_cs; i++) {
181 struct mbus_dram_window *cs = dram->cs + i;
182
183 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
184 (cs->mbus_attr << 8) |
185 (dram->mbus_dram_target_id << 4) | 1);
186 wrl(USB_WINDOW_BASE(i), cs->base);
187 }
188 }
189
ehci_orion_drv_probe(struct platform_device * pdev)190 static int __init ehci_orion_drv_probe(struct platform_device *pdev)
191 {
192 struct orion_ehci_data *pd = pdev->dev.platform_data;
193 struct resource *res;
194 struct usb_hcd *hcd;
195 struct ehci_hcd *ehci;
196 void __iomem *regs;
197 int irq, err;
198
199 if (usb_disabled())
200 return -ENODEV;
201
202 pr_debug("Initializing Orion-SoC USB Host Controller\n");
203
204 irq = platform_get_irq(pdev, 0);
205 if (irq <= 0) {
206 dev_err(&pdev->dev,
207 "Found HC with no IRQ. Check %s setup!\n",
208 dev_name(&pdev->dev));
209 err = -ENODEV;
210 goto err1;
211 }
212
213 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
214 if (!res) {
215 dev_err(&pdev->dev,
216 "Found HC with no register addr. Check %s setup!\n",
217 dev_name(&pdev->dev));
218 err = -ENODEV;
219 goto err1;
220 }
221
222 if (!request_mem_region(res->start, res->end - res->start + 1,
223 ehci_orion_hc_driver.description)) {
224 dev_dbg(&pdev->dev, "controller already in use\n");
225 err = -EBUSY;
226 goto err1;
227 }
228
229 regs = ioremap(res->start, res->end - res->start + 1);
230 if (regs == NULL) {
231 dev_dbg(&pdev->dev, "error mapping memory\n");
232 err = -EFAULT;
233 goto err2;
234 }
235
236 hcd = usb_create_hcd(&ehci_orion_hc_driver,
237 &pdev->dev, dev_name(&pdev->dev));
238 if (!hcd) {
239 err = -ENOMEM;
240 goto err3;
241 }
242
243 hcd->rsrc_start = res->start;
244 hcd->rsrc_len = res->end - res->start + 1;
245 hcd->regs = regs;
246
247 ehci = hcd_to_ehci(hcd);
248 ehci->caps = hcd->regs + 0x100;
249 ehci->regs = hcd->regs + 0x100 +
250 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
251 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
252 hcd->has_tt = 1;
253 ehci->sbrn = 0x20;
254
255 /*
256 * (Re-)program MBUS remapping windows if we are asked to.
257 */
258 if (pd != NULL && pd->dram != NULL)
259 ehci_orion_conf_mbus_windows(hcd, pd->dram);
260
261 /*
262 * setup Orion USB controller.
263 */
264 switch (pd->phy_version) {
265 case EHCI_PHY_NA: /* dont change USB phy settings */
266 break;
267 case EHCI_PHY_ORION:
268 orion_usb_phy_v1_setup(hcd);
269 break;
270 case EHCI_PHY_DD:
271 case EHCI_PHY_KW:
272 default:
273 printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n");
274 }
275
276 err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
277 if (err)
278 goto err4;
279
280 return 0;
281
282 err4:
283 usb_put_hcd(hcd);
284 err3:
285 iounmap(regs);
286 err2:
287 release_mem_region(res->start, res->end - res->start + 1);
288 err1:
289 dev_err(&pdev->dev, "init %s fail, %d\n",
290 dev_name(&pdev->dev), err);
291
292 return err;
293 }
294
ehci_orion_drv_remove(struct platform_device * pdev)295 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
296 {
297 struct usb_hcd *hcd = platform_get_drvdata(pdev);
298
299 usb_remove_hcd(hcd);
300 iounmap(hcd->regs);
301 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
302 usb_put_hcd(hcd);
303
304 return 0;
305 }
306
307 MODULE_ALIAS("platform:orion-ehci");
308
309 static struct platform_driver ehci_orion_driver = {
310 .probe = ehci_orion_drv_probe,
311 .remove = __exit_p(ehci_orion_drv_remove),
312 .shutdown = usb_hcd_platform_shutdown,
313 .driver.name = "orion-ehci",
314 };
315