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11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/mbus.h>
15#include <linux/clk.h>
16#include <linux/platform_data/usb-ehci-orion.h>
17#include <linux/of.h>
18#include <linux/phy/phy.h>
19#include <linux/of_device.h>
20#include <linux/of_irq.h>
21#include <linux/usb.h>
22#include <linux/usb/hcd.h>
23#include <linux/io.h>
24#include <linux/dma-mapping.h>
25
26#include "ehci.h"
27
28#define rdl(off) readl_relaxed(hcd->regs + (off))
29#define wrl(off, val) writel_relaxed((val), hcd->regs + (off))
30
31#define USB_CMD 0x140
32#define USB_CMD_RUN BIT(0)
33#define USB_CMD_RESET BIT(1)
34#define USB_MODE 0x1a8
35#define USB_MODE_MASK GENMASK(1, 0)
36#define USB_MODE_DEVICE 0x2
37#define USB_MODE_HOST 0x3
38#define USB_MODE_SDIS BIT(4)
39#define USB_CAUSE 0x310
40#define USB_MASK 0x314
41#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
42#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
43#define USB_IPG 0x360
44#define USB_PHY_PWR_CTRL 0x400
45#define USB_PHY_TX_CTRL 0x420
46#define USB_PHY_RX_CTRL 0x430
47#define USB_PHY_IVREF_CTRL 0x440
48#define USB_PHY_TST_GRP_CTRL 0x450
49
50#define DRIVER_DESC "EHCI orion driver"
51
52#define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
53
54struct orion_ehci_hcd {
55 struct clk *clk;
56 struct phy *phy;
57};
58
59static const char hcd_name[] = "ehci-orion";
60
61static struct hc_driver __read_mostly ehci_orion_hc_driver;
62
63
64
65
66static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
67{
68
69
70
71
72 wrl(USB_CAUSE, 0);
73 wrl(USB_MASK, 0);
74
75
76
77
78 wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
79 while (rdl(USB_CMD) & USB_CMD_RESET);
80
81
82
83
84
85 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
86
87
88
89
90
91 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
92
93
94
95
96
97 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
98
99
100
101
102
103
104 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
105
106
107
108
109
110 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
111
112
113
114
115
116 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
117
118
119
120
121 wrl(USB_CMD, rdl(USB_CMD) & ~USB_CMD_RUN);
122 wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
123 while (rdl(USB_CMD) & USB_CMD_RESET);
124
125
126
127
128
129
130 wrl(USB_MODE, USB_MODE_SDIS | USB_MODE_HOST);
131}
132
133static void
134ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
135 const struct mbus_dram_target_info *dram)
136{
137 int i;
138
139 for (i = 0; i < 4; i++) {
140 wrl(USB_WINDOW_CTRL(i), 0);
141 wrl(USB_WINDOW_BASE(i), 0);
142 }
143
144 for (i = 0; i < dram->num_cs; i++) {
145 const struct mbus_dram_window *cs = dram->cs + i;
146
147 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
148 (cs->mbus_attr << 8) |
149 (dram->mbus_dram_target_id << 4) | 1);
150 wrl(USB_WINDOW_BASE(i), cs->base);
151 }
152}
153
154static const struct ehci_driver_overrides orion_overrides __initconst = {
155 .extra_priv_size = sizeof(struct orion_ehci_hcd),
156};
157
158static int ehci_orion_drv_probe(struct platform_device *pdev)
159{
160 struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev);
161 const struct mbus_dram_target_info *dram;
162 struct resource *res;
163 struct usb_hcd *hcd;
164 struct ehci_hcd *ehci;
165 void __iomem *regs;
166 int irq, err;
167 enum orion_ehci_phy_ver phy_version;
168 struct orion_ehci_hcd *priv;
169
170 if (usb_disabled())
171 return -ENODEV;
172
173 pr_debug("Initializing Orion-SoC USB Host Controller\n");
174
175 irq = platform_get_irq(pdev, 0);
176 if (irq <= 0) {
177 dev_err(&pdev->dev,
178 "Found HC with no IRQ. Check %s setup!\n",
179 dev_name(&pdev->dev));
180 err = -ENODEV;
181 goto err;
182 }
183
184
185
186
187
188
189 err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
190 if (err)
191 goto err;
192
193 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
194 regs = devm_ioremap_resource(&pdev->dev, res);
195 if (IS_ERR(regs)) {
196 err = PTR_ERR(regs);
197 goto err;
198 }
199
200 hcd = usb_create_hcd(&ehci_orion_hc_driver,
201 &pdev->dev, dev_name(&pdev->dev));
202 if (!hcd) {
203 err = -ENOMEM;
204 goto err;
205 }
206
207 hcd->rsrc_start = res->start;
208 hcd->rsrc_len = resource_size(res);
209 hcd->regs = regs;
210
211 ehci = hcd_to_ehci(hcd);
212 ehci->caps = hcd->regs + 0x100;
213 hcd->has_tt = 1;
214
215 priv = hcd_to_orion_priv(hcd);
216
217
218
219
220 priv->clk = devm_clk_get(&pdev->dev, NULL);
221 if (!IS_ERR(priv->clk))
222 clk_prepare_enable(priv->clk);
223
224 priv->phy = devm_phy_optional_get(&pdev->dev, "usb");
225 if (IS_ERR(priv->phy)) {
226 err = PTR_ERR(priv->phy);
227 goto err_phy_get;
228 } else {
229 err = phy_init(priv->phy);
230 if (err)
231 goto err_phy_init;
232
233 err = phy_power_on(priv->phy);
234 if (err)
235 goto err_phy_power_on;
236 }
237
238
239
240
241 dram = mv_mbus_dram_info();
242 if (dram)
243 ehci_orion_conf_mbus_windows(hcd, dram);
244
245
246
247
248 if (pdev->dev.of_node)
249 phy_version = EHCI_PHY_NA;
250 else
251 phy_version = pd->phy_version;
252
253 switch (phy_version) {
254 case EHCI_PHY_NA:
255 break;
256 case EHCI_PHY_ORION:
257 orion_usb_phy_v1_setup(hcd);
258 break;
259 case EHCI_PHY_DD:
260 case EHCI_PHY_KW:
261 default:
262 dev_warn(&pdev->dev, "USB phy version isn't supported.\n");
263 }
264
265 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
266 if (err)
267 goto err_add_hcd;
268
269 device_wakeup_enable(hcd->self.controller);
270 return 0;
271
272err_add_hcd:
273 if (!IS_ERR(priv->phy))
274 phy_power_off(priv->phy);
275err_phy_power_on:
276 if (!IS_ERR(priv->phy))
277 phy_exit(priv->phy);
278err_phy_init:
279err_phy_get:
280 if (!IS_ERR(priv->clk))
281 clk_disable_unprepare(priv->clk);
282 usb_put_hcd(hcd);
283err:
284 dev_err(&pdev->dev, "init %s fail, %d\n",
285 dev_name(&pdev->dev), err);
286
287 return err;
288}
289
290static int ehci_orion_drv_remove(struct platform_device *pdev)
291{
292 struct usb_hcd *hcd = platform_get_drvdata(pdev);
293 struct orion_ehci_hcd *priv = hcd_to_orion_priv(hcd);
294
295 usb_remove_hcd(hcd);
296
297 if (!IS_ERR(priv->phy)) {
298 phy_power_off(priv->phy);
299 phy_exit(priv->phy);
300 }
301
302 if (!IS_ERR(priv->clk))
303 clk_disable_unprepare(priv->clk);
304
305 usb_put_hcd(hcd);
306
307 return 0;
308}
309
310static const struct of_device_id ehci_orion_dt_ids[] = {
311 { .compatible = "marvell,orion-ehci", },
312 {},
313};
314MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
315
316static struct platform_driver ehci_orion_driver = {
317 .probe = ehci_orion_drv_probe,
318 .remove = ehci_orion_drv_remove,
319 .shutdown = usb_hcd_platform_shutdown,
320 .driver = {
321 .name = "orion-ehci",
322 .of_match_table = ehci_orion_dt_ids,
323 },
324};
325
326static int __init ehci_orion_init(void)
327{
328 if (usb_disabled())
329 return -ENODEV;
330
331 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
332
333 ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides);
334 return platform_driver_register(&ehci_orion_driver);
335}
336module_init(ehci_orion_init);
337
338static void __exit ehci_orion_cleanup(void)
339{
340 platform_driver_unregister(&ehci_orion_driver);
341}
342module_exit(ehci_orion_cleanup);
343
344MODULE_DESCRIPTION(DRIVER_DESC);
345MODULE_ALIAS("platform:orion-ehci");
346MODULE_AUTHOR("Tzachi Perelstein");
347MODULE_LICENSE("GPL v2");
348