Merge commit 'origin/master'
[linux-2.6] / drivers / usb / host / ehci-orion.c
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         hcd->has_tt = 1;
119
120         ehci_reset(ehci);
121         ehci_port_power(ehci, 0);
122
123         return retval;
124 }
125
126 static const struct hc_driver ehci_orion_hc_driver = {
127         .description = hcd_name,
128         .product_desc = "Marvell Orion EHCI",
129         .hcd_priv_size = sizeof(struct ehci_hcd),
130
131         /*
132          * generic hardware linkage
133          */
134         .irq = ehci_irq,
135         .flags = HCD_MEMORY | HCD_USB2,
136
137         /*
138          * basic lifecycle operations
139          */
140         .reset = ehci_orion_setup,
141         .start = ehci_run,
142         .stop = ehci_stop,
143         .shutdown = ehci_shutdown,
144
145         /*
146          * managing i/o requests and associated device resources
147          */
148         .urb_enqueue = ehci_urb_enqueue,
149         .urb_dequeue = ehci_urb_dequeue,
150         .endpoint_disable = ehci_endpoint_disable,
151
152         /*
153          * scheduling support
154          */
155         .get_frame_number = ehci_get_frame,
156
157         /*
158          * root hub support
159          */
160         .hub_status_data = ehci_hub_status_data,
161         .hub_control = ehci_hub_control,
162         .bus_suspend = ehci_bus_suspend,
163         .bus_resume = ehci_bus_resume,
164         .relinquish_port = ehci_relinquish_port,
165         .port_handed_over = ehci_port_handed_over,
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                         dev_name(&pdev->dev));
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                         dev_name(&pdev->dev));
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, dev_name(&pdev->dev));
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         hcd->has_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                 dev_name(&pdev->dev), 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 };