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
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