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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 USB_SBUSCFG 0x90
51
52
53#define USB_SBUSCFG_BAWR_ALIGN_128B (0x3 << 6)
54#define USB_SBUSCFG_BARD_ALIGN_128B (0x3 << 3)
55
56#define USB_SBUSCFG_AHBBRST_INCR16 (0x3 << 0)
57
58#define USB_SBUSCFG_DEF_VAL (USB_SBUSCFG_BAWR_ALIGN_128B \
59 | USB_SBUSCFG_BARD_ALIGN_128B \
60 | USB_SBUSCFG_AHBBRST_INCR16)
61
62#define DRIVER_DESC "EHCI orion driver"
63
64#define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
65
66struct orion_ehci_hcd {
67 struct clk *clk;
68 struct phy *phy;
69};
70
71static const char hcd_name[] = "ehci-orion";
72
73static struct hc_driver __read_mostly ehci_orion_hc_driver;
74
75
76
77
78static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
79{
80
81
82
83
84 wrl(USB_CAUSE, 0);
85 wrl(USB_MASK, 0);
86
87
88
89
90 wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
91 while (rdl(USB_CMD) & USB_CMD_RESET);
92
93
94
95
96
97 wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
98
99
100
101
102
103 wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
104
105
106
107
108
109 wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
110
111
112
113
114
115
116 wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
117
118
119
120
121
122 wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
123
124
125
126
127
128 wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
129
130
131
132
133 wrl(USB_CMD, rdl(USB_CMD) & ~USB_CMD_RUN);
134 wrl(USB_CMD, rdl(USB_CMD) | USB_CMD_RESET);
135 while (rdl(USB_CMD) & USB_CMD_RESET);
136
137
138
139
140
141
142 wrl(USB_MODE, USB_MODE_SDIS | USB_MODE_HOST);
143}
144
145static void
146ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
147 const struct mbus_dram_target_info *dram)
148{
149 int i;
150
151 for (i = 0; i < 4; i++) {
152 wrl(USB_WINDOW_CTRL(i), 0);
153 wrl(USB_WINDOW_BASE(i), 0);
154 }
155
156 for (i = 0; i < dram->num_cs; i++) {
157 const struct mbus_dram_window *cs = dram->cs + i;
158
159 wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
160 (cs->mbus_attr << 8) |
161 (dram->mbus_dram_target_id << 4) | 1);
162 wrl(USB_WINDOW_BASE(i), cs->base);
163 }
164}
165
166static int ehci_orion_drv_reset(struct usb_hcd *hcd)
167{
168 struct device *dev = hcd->self.controller;
169 int ret;
170
171 ret = ehci_setup(hcd);
172 if (ret)
173 return ret;
174
175
176
177
178
179
180
181
182 if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))
183 wrl(USB_SBUSCFG, USB_SBUSCFG_DEF_VAL);
184
185 return ret;
186}
187
188static const struct ehci_driver_overrides orion_overrides __initconst = {
189 .extra_priv_size = sizeof(struct orion_ehci_hcd),
190 .reset = ehci_orion_drv_reset,
191};
192
193static int ehci_orion_drv_probe(struct platform_device *pdev)
194{
195 struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev);
196 const struct mbus_dram_target_info *dram;
197 struct resource *res;
198 struct usb_hcd *hcd;
199 struct ehci_hcd *ehci;
200 void __iomem *regs;
201 int irq, err;
202 enum orion_ehci_phy_ver phy_version;
203 struct orion_ehci_hcd *priv;
204
205 if (usb_disabled())
206 return -ENODEV;
207
208 pr_debug("Initializing Orion-SoC USB Host Controller\n");
209
210 irq = platform_get_irq(pdev, 0);
211 if (irq <= 0) {
212 dev_err(&pdev->dev,
213 "Found HC with no IRQ. Check %s setup!\n",
214 dev_name(&pdev->dev));
215 err = -ENODEV;
216 goto err;
217 }
218
219
220
221
222
223
224 err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
225 if (err)
226 goto err;
227
228 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
229 regs = devm_ioremap_resource(&pdev->dev, res);
230 if (IS_ERR(regs)) {
231 err = PTR_ERR(regs);
232 goto err;
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 err;
240 }
241
242 hcd->rsrc_start = res->start;
243 hcd->rsrc_len = resource_size(res);
244 hcd->regs = regs;
245
246 ehci = hcd_to_ehci(hcd);
247 ehci->caps = hcd->regs + 0x100;
248 hcd->has_tt = 1;
249
250 priv = hcd_to_orion_priv(hcd);
251
252
253
254
255 priv->clk = devm_clk_get(&pdev->dev, NULL);
256 if (!IS_ERR(priv->clk))
257 clk_prepare_enable(priv->clk);
258
259 priv->phy = devm_phy_optional_get(&pdev->dev, "usb");
260 if (IS_ERR(priv->phy)) {
261 err = PTR_ERR(priv->phy);
262 if (err != -ENOSYS)
263 goto err_phy_get;
264 } else {
265 err = phy_init(priv->phy);
266 if (err)
267 goto err_phy_init;
268
269 err = phy_power_on(priv->phy);
270 if (err)
271 goto err_phy_power_on;
272 }
273
274
275
276
277 dram = mv_mbus_dram_info();
278 if (dram)
279 ehci_orion_conf_mbus_windows(hcd, dram);
280
281
282
283
284 if (pdev->dev.of_node)
285 phy_version = EHCI_PHY_NA;
286 else
287 phy_version = pd->phy_version;
288
289 switch (phy_version) {
290 case EHCI_PHY_NA:
291 break;
292 case EHCI_PHY_ORION:
293 orion_usb_phy_v1_setup(hcd);
294 break;
295 case EHCI_PHY_DD:
296 case EHCI_PHY_KW:
297 default:
298 dev_warn(&pdev->dev, "USB phy version isn't supported.\n");
299 }
300
301 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
302 if (err)
303 goto err_add_hcd;
304
305 device_wakeup_enable(hcd->self.controller);
306 return 0;
307
308err_add_hcd:
309 if (!IS_ERR(priv->phy))
310 phy_power_off(priv->phy);
311err_phy_power_on:
312 if (!IS_ERR(priv->phy))
313 phy_exit(priv->phy);
314err_phy_init:
315err_phy_get:
316 if (!IS_ERR(priv->clk))
317 clk_disable_unprepare(priv->clk);
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->phy)) {
334 phy_power_off(priv->phy);
335 phy_exit(priv->phy);
336 }
337
338 if (!IS_ERR(priv->clk))
339 clk_disable_unprepare(priv->clk);
340
341 usb_put_hcd(hcd);
342
343 return 0;
344}
345
346static const struct of_device_id ehci_orion_dt_ids[] = {
347 { .compatible = "marvell,orion-ehci", },
348 { .compatible = "marvell,armada-3700-ehci", },
349 {},
350};
351MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
352
353static struct platform_driver ehci_orion_driver = {
354 .probe = ehci_orion_drv_probe,
355 .remove = ehci_orion_drv_remove,
356 .shutdown = usb_hcd_platform_shutdown,
357 .driver = {
358 .name = "orion-ehci",
359 .of_match_table = ehci_orion_dt_ids,
360 },
361};
362
363static int __init ehci_orion_init(void)
364{
365 if (usb_disabled())
366 return -ENODEV;
367
368 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
369
370 ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides);
371 return platform_driver_register(&ehci_orion_driver);
372}
373module_init(ehci_orion_init);
374
375static void __exit ehci_orion_cleanup(void)
376{
377 platform_driver_unregister(&ehci_orion_driver);
378}
379module_exit(ehci_orion_cleanup);
380
381MODULE_DESCRIPTION(DRIVER_DESC);
382MODULE_ALIAS("platform:orion-ehci");
383MODULE_AUTHOR("Tzachi Perelstein");
384MODULE_LICENSE("GPL v2");
385