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Tzachi Perelsteine96ffe22007-12-01 11:07:04 -05001/*
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>
Lennert Buytenhek92aecfa2008-03-27 14:51:39 -040014#include <linux/mbus.h>
Lennert Buytenhek705a7522008-03-27 14:51:40 -040015#include <asm/plat-orion/ehci-orion.h>
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -050016
17#define rdl(off) __raw_readl(hcd->regs + (off))
18#define wrl(off, val) __raw_writel((val), hcd->regs + (off))
19
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -050020#define USB_CMD 0x140
21#define USB_MODE 0x1a8
Lennert Buytenhek92aecfa2008-03-27 14:51:39 -040022#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))
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -050026#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_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
102static 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
Lennert Buytenhek129bd472008-05-20 19:08:53 +0200118 hcd->has_tt = 1;
119
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500120 ehci_reset(ehci);
121 ehci_port_power(ehci, 0);
122
123 return retval;
124}
125
126static 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,
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500142 .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,
Alan Sterna8e51772008-05-20 16:58:11 -0400164 .relinquish_port = ehci_relinquish_port,
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500165};
166
Lennert Buytenhek92aecfa2008-03-27 14:51:39 -0400167static void __init
168ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
169 struct mbus_dram_target_info *dram)
170{
171 int i;
172
173 for (i = 0; i < 4; i++) {
174 wrl(USB_WINDOW_CTRL(i), 0);
175 wrl(USB_WINDOW_BASE(i), 0);
176 }
177
178 for (i = 0; i < dram->num_cs; i++) {
179 struct mbus_dram_window *cs = dram->cs + i;
180
181 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
182 (cs->mbus_attr << 8) |
183 (dram->mbus_dram_target_id << 4) | 1);
184 wrl(USB_WINDOW_BASE(i), cs->base);
185 }
186}
187
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500188static int __init ehci_orion_drv_probe(struct platform_device *pdev)
189{
Lennert Buytenhek92aecfa2008-03-27 14:51:39 -0400190 struct orion_ehci_data *pd = pdev->dev.platform_data;
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500191 struct resource *res;
192 struct usb_hcd *hcd;
193 struct ehci_hcd *ehci;
194 void __iomem *regs;
195 int irq, err;
196
197 if (usb_disabled())
198 return -ENODEV;
199
200 pr_debug("Initializing Orion-SoC USB Host Controller\n");
201
202 irq = platform_get_irq(pdev, 0);
203 if (irq <= 0) {
204 dev_err(&pdev->dev,
205 "Found HC with no IRQ. Check %s setup!\n",
206 pdev->dev.bus_id);
207 err = -ENODEV;
208 goto err1;
209 }
210
211 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
212 if (!res) {
213 dev_err(&pdev->dev,
214 "Found HC with no register addr. Check %s setup!\n",
215 pdev->dev.bus_id);
216 err = -ENODEV;
217 goto err1;
218 }
219
220 if (!request_mem_region(res->start, res->end - res->start + 1,
221 ehci_orion_hc_driver.description)) {
222 dev_dbg(&pdev->dev, "controller already in use\n");
223 err = -EBUSY;
224 goto err1;
225 }
226
227 regs = ioremap(res->start, res->end - res->start + 1);
228 if (regs == NULL) {
229 dev_dbg(&pdev->dev, "error mapping memory\n");
230 err = -EFAULT;
231 goto err2;
232 }
233
234 hcd = usb_create_hcd(&ehci_orion_hc_driver,
235 &pdev->dev, pdev->dev.bus_id);
236 if (!hcd) {
237 err = -ENOMEM;
238 goto err3;
239 }
240
241 hcd->rsrc_start = res->start;
242 hcd->rsrc_len = res->end - res->start + 1;
243 hcd->regs = regs;
244
245 ehci = hcd_to_ehci(hcd);
246 ehci->caps = hcd->regs + 0x100;
247 ehci->regs = hcd->regs + 0x100 +
248 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
249 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
Alan Sterna8e51772008-05-20 16:58:11 -0400250 hcd->has_tt = 1;
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500251 ehci->sbrn = 0x20;
252
253 /*
Lennert Buytenhek92aecfa2008-03-27 14:51:39 -0400254 * (Re-)program MBUS remapping windows if we are asked to.
255 */
256 if (pd != NULL && pd->dram != NULL)
257 ehci_orion_conf_mbus_windows(hcd, pd->dram);
258
259 /*
Tzachi Perelsteine96ffe22007-12-01 11:07:04 -0500260 * setup Orion USB controller
261 */
262 orion_usb_setup(hcd);
263
264 err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
265 if (err)
266 goto err4;
267
268 return 0;
269
270err4:
271 usb_put_hcd(hcd);
272err3:
273 iounmap(regs);
274err2:
275 release_mem_region(res->start, res->end - res->start + 1);
276err1:
277 dev_err(&pdev->dev, "init %s fail, %d\n",
278 pdev->dev.bus_id, err);
279
280 return err;
281}
282
283static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
284{
285 struct usb_hcd *hcd = platform_get_drvdata(pdev);
286
287 usb_remove_hcd(hcd);
288 iounmap(hcd->regs);
289 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
290 usb_put_hcd(hcd);
291
292 return 0;
293}
294
295MODULE_ALIAS("platform:orion-ehci");
296
297static struct platform_driver ehci_orion_driver = {
298 .probe = ehci_orion_drv_probe,
299 .remove = __exit_p(ehci_orion_drv_remove),
300 .shutdown = usb_hcd_platform_shutdown,
301 .driver.name = "orion-ehci",
302};