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8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/mbus.h>
12#include <linux/clk.h>
13#include <linux/platform_data/usb-ehci-orion.h>
14#include <linux/of.h>
15#include <linux/phy/phy.h>
16#include <linux/of_device.h>
17#include <linux/of_irq.h>
18#include <linux/usb.h>
19#include <linux/usb/hcd.h>
20#include <linux/io.h>
21#include <linux/dma-mapping.h>
22
23#include "ehci.h"
24
25#define rdl(off) readl_relaxed(hcd->regs + (off))
26#define wrl(off, val) writel_relaxed((val), hcd->regs + (off))
27
28#define USB_CMD 0x140
29#define USB_CMD_RUN BIT(0)
30#define USB_CMD_RESET BIT(1)
31#define USB_MODE 0x1a8
32#define USB_MODE_MASK GENMASK(1, 0)
33#define USB_MODE_DEVICE 0x2
34#define USB_MODE_HOST 0x3
35#define USB_MODE_SDIS BIT(4)
36#define USB_CAUSE 0x310
37#define USB_MASK 0x314
38#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
39#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
40#define USB_IPG 0x360
41#define USB_PHY_PWR_CTRL 0x400
42#define USB_PHY_TX_CTRL 0x420
43#define USB_PHY_RX_CTRL 0x430
44#define USB_PHY_IVREF_CTRL 0x440
45#define USB_PHY_TST_GRP_CTRL 0x450
46
47#define USB_SBUSCFG 0x90
48
49
50#define USB_SBUSCFG_BAWR_ALIGN_128B (0x3 << 6)
51#define USB_SBUSCFG_BARD_ALIGN_128B (0x3 << 3)
52
53#define USB_SBUSCFG_AHBBRST_INCR16 (0x3 << 0)
54
55#define USB_SBUSCFG_DEF_VAL (USB_SBUSCFG_BAWR_ALIGN_128B \
56 | USB_SBUSCFG_BARD_ALIGN_128B \
57 | USB_SBUSCFG_AHBBRST_INCR16)
58
59#define DRIVER_DESC "EHCI orion driver"
60
61#define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
62
63struct orion_ehci_hcd {
64 struct clk *clk;
65 struct phy *phy;
66};
67
68static const char hcd_name[] = "ehci-orion";
69
70static struct hc_driver __read_mostly ehci_orion_hc_driver;
71
72
73
74
75static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
76{
77
78
79
80
81 wrl(USB_CAUSE, 0);
82 wrl(USB_MASK, 0);
83
84
85
86
87 wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
88 while (rdl(USB_CMD) & USB_CMD_RESET);
89
90
91
92
93
94 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
95
96
97
98
99
100 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
101
102
103
104
105
106 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
107
108
109
110
111
112
113 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
114
115
116
117
118
119 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
120
121
122
123
124
125 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
126
127
128
129
130 wrl(USB_CMD, rdl(USB_CMD) & ~USB_CMD_RUN);
131 wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
132 while (rdl(USB_CMD) & USB_CMD_RESET);
133
134
135
136
137
138
139 wrl(USB_MODE, USB_MODE_SDIS | USB_MODE_HOST);
140}
141
142static void
143ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
144 const struct mbus_dram_target_info *dram)
145{
146 int i;
147
148 for (i = 0; i < 4; i++) {
149 wrl(USB_WINDOW_CTRL(i), 0);
150 wrl(USB_WINDOW_BASE(i), 0);
151 }
152
153 for (i = 0; i < dram->num_cs; i++) {
154 const struct mbus_dram_window *cs = dram->cs + i;
155
156 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
157 (cs->mbus_attr << 8) |
158 (dram->mbus_dram_target_id << 4) | 1);
159 wrl(USB_WINDOW_BASE(i), cs->base);
160 }
161}
162
163static int ehci_orion_drv_reset(struct usb_hcd *hcd)
164{
165 struct device *dev = hcd->self.controller;
166 int ret;
167
168 ret = ehci_setup(hcd);
169 if (ret)
170 return ret;
171
172
173
174
175
176
177
178
179 if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))
180 wrl(USB_SBUSCFG, USB_SBUSCFG_DEF_VAL);
181
182 return ret;
183}
184
185static int __maybe_unused ehci_orion_drv_suspend(struct device *dev)
186{
187 struct usb_hcd *hcd = dev_get_drvdata(dev);
188
189 return ehci_suspend(hcd, device_may_wakeup(dev));
190}
191
192static int __maybe_unused ehci_orion_drv_resume(struct device *dev)
193{
194 struct usb_hcd *hcd = dev_get_drvdata(dev);
195
196 return ehci_resume(hcd, false);
197}
198
199static SIMPLE_DEV_PM_OPS(ehci_orion_pm_ops, ehci_orion_drv_suspend,
200 ehci_orion_drv_resume);
201
202static const struct ehci_driver_overrides orion_overrides __initconst = {
203 .extra_priv_size = sizeof(struct orion_ehci_hcd),
204 .reset = ehci_orion_drv_reset,
205};
206
207static int ehci_orion_drv_probe(struct platform_device *pdev)
208{
209 struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev);
210 const struct mbus_dram_target_info *dram;
211 struct resource *res;
212 struct usb_hcd *hcd;
213 struct ehci_hcd *ehci;
214 void __iomem *regs;
215 int irq, err;
216 enum orion_ehci_phy_ver phy_version;
217 struct orion_ehci_hcd *priv;
218
219 if (usb_disabled())
220 return -ENODEV;
221
222 pr_debug("Initializing Orion-SoC USB Host Controller\n");
223
224 irq = platform_get_irq(pdev, 0);
225 if (irq <= 0) {
226 err = -ENODEV;
227 goto err;
228 }
229
230
231
232
233
234
235 err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
236 if (err)
237 goto err;
238
239 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
240 regs = devm_ioremap_resource(&pdev->dev, res);
241 if (IS_ERR(regs)) {
242 err = PTR_ERR(regs);
243 goto err;
244 }
245
246 hcd = usb_create_hcd(&ehci_orion_hc_driver,
247 &pdev->dev, dev_name(&pdev->dev));
248 if (!hcd) {
249 err = -ENOMEM;
250 goto err;
251 }
252
253 hcd->rsrc_start = res->start;
254 hcd->rsrc_len = resource_size(res);
255 hcd->regs = regs;
256
257 ehci = hcd_to_ehci(hcd);
258 ehci->caps = hcd->regs + 0x100;
259 hcd->has_tt = 1;
260
261 priv = hcd_to_orion_priv(hcd);
262
263
264
265
266 priv->clk = devm_clk_get(&pdev->dev, NULL);
267 if (!IS_ERR(priv->clk)) {
268 err = clk_prepare_enable(priv->clk);
269 if (err)
270 goto err_put_hcd;
271 }
272
273 priv->phy = devm_phy_optional_get(&pdev->dev, "usb");
274 if (IS_ERR(priv->phy)) {
275 err = PTR_ERR(priv->phy);
276 if (err != -ENOSYS)
277 goto err_dis_clk;
278 }
279
280
281
282
283 dram = mv_mbus_dram_info();
284 if (dram)
285 ehci_orion_conf_mbus_windows(hcd, dram);
286
287
288
289
290 if (pdev->dev.of_node)
291 phy_version = EHCI_PHY_NA;
292 else
293 phy_version = pd->phy_version;
294
295 switch (phy_version) {
296 case EHCI_PHY_NA:
297 break;
298 case EHCI_PHY_ORION:
299 orion_usb_phy_v1_setup(hcd);
300 break;
301 case EHCI_PHY_DD:
302 case EHCI_PHY_KW:
303 default:
304 dev_warn(&pdev->dev, "USB phy version isn't supported.\n");
305 }
306
307 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
308 if (err)
309 goto err_dis_clk;
310
311 device_wakeup_enable(hcd->self.controller);
312 return 0;
313
314err_dis_clk:
315 if (!IS_ERR(priv->clk))
316 clk_disable_unprepare(priv->clk);
317err_put_hcd:
318 usb_put_hcd(hcd);
319err:
320 dev_err(&pdev->dev, "init %s fail, %d\n",
321 dev_name(&pdev->dev), err);
322
323 return err;
324}
325
326static int ehci_orion_drv_remove(struct platform_device *pdev)
327{
328 struct usb_hcd *hcd = platform_get_drvdata(pdev);
329 struct orion_ehci_hcd *priv = hcd_to_orion_priv(hcd);
330
331 usb_remove_hcd(hcd);
332
333 if (!IS_ERR(priv->clk))
334 clk_disable_unprepare(priv->clk);
335
336 usb_put_hcd(hcd);
337
338 return 0;
339}
340
341static const struct of_device_id ehci_orion_dt_ids[] = {
342 { .compatible = "marvell,orion-ehci", },
343 { .compatible = "marvell,armada-3700-ehci", },
344 {},
345};
346MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
347
348static struct platform_driver ehci_orion_driver = {
349 .probe = ehci_orion_drv_probe,
350 .remove = ehci_orion_drv_remove,
351 .shutdown = usb_hcd_platform_shutdown,
352 .driver = {
353 .name = "orion-ehci",
354 .of_match_table = ehci_orion_dt_ids,
355 .pm = &ehci_orion_pm_ops,
356 },
357};
358
359static int __init ehci_orion_init(void)
360{
361 if (usb_disabled())
362 return -ENODEV;
363
364 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
365
366 ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides);
367 return platform_driver_register(&ehci_orion_driver);
368}
369module_init(ehci_orion_init);
370
371static void __exit ehci_orion_cleanup(void)
372{
373 platform_driver_unregister(&ehci_orion_driver);
374}
375module_exit(ehci_orion_cleanup);
376
377MODULE_DESCRIPTION(DRIVER_DESC);
378MODULE_ALIAS("platform:orion-ehci");
379MODULE_AUTHOR("Tzachi Perelstein");
380MODULE_LICENSE("GPL v2");
381