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e96ffe2f TP |
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> | |
92aecfa9 | 14 | #include <linux/mbus.h> |
705a7521 | 15 | #include <asm/plat-orion/ehci-orion.h> |
e96ffe2f TP |
16 | |
17 | #define rdl(off) __raw_readl(hcd->regs + (off)) | |
18 | #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) | |
19 | ||
e96ffe2f TP |
20 | #define USB_CMD 0x140 |
21 | #define USB_MODE 0x1a8 | |
92aecfa9 LB |
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)) | |
e96ffe2f TP |
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 | ||
129bd474 LB |
118 | hcd->has_tt = 1; |
119 | ||
e96ffe2f TP |
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 | #ifdef CONFIG_PM | |
143 | .suspend = ehci_bus_suspend, | |
144 | .resume = ehci_bus_resume, | |
145 | #endif | |
146 | .stop = ehci_stop, | |
147 | .shutdown = ehci_shutdown, | |
148 | ||
149 | /* | |
150 | * managing i/o requests and associated device resources | |
151 | */ | |
152 | .urb_enqueue = ehci_urb_enqueue, | |
153 | .urb_dequeue = ehci_urb_dequeue, | |
154 | .endpoint_disable = ehci_endpoint_disable, | |
155 | ||
156 | /* | |
157 | * scheduling support | |
158 | */ | |
159 | .get_frame_number = ehci_get_frame, | |
160 | ||
161 | /* | |
162 | * root hub support | |
163 | */ | |
164 | .hub_status_data = ehci_hub_status_data, | |
165 | .hub_control = ehci_hub_control, | |
166 | .bus_suspend = ehci_bus_suspend, | |
167 | .bus_resume = ehci_bus_resume, | |
168 | }; | |
169 | ||
92aecfa9 LB |
170 | static void __init |
171 | ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, | |
172 | struct mbus_dram_target_info *dram) | |
173 | { | |
174 | int i; | |
175 | ||
176 | for (i = 0; i < 4; i++) { | |
177 | wrl(USB_WINDOW_CTRL(i), 0); | |
178 | wrl(USB_WINDOW_BASE(i), 0); | |
179 | } | |
180 | ||
181 | for (i = 0; i < dram->num_cs; i++) { | |
182 | struct mbus_dram_window *cs = dram->cs + i; | |
183 | ||
184 | wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | | |
185 | (cs->mbus_attr << 8) | | |
186 | (dram->mbus_dram_target_id << 4) | 1); | |
187 | wrl(USB_WINDOW_BASE(i), cs->base); | |
188 | } | |
189 | } | |
190 | ||
e96ffe2f TP |
191 | static int __init ehci_orion_drv_probe(struct platform_device *pdev) |
192 | { | |
92aecfa9 | 193 | struct orion_ehci_data *pd = pdev->dev.platform_data; |
e96ffe2f TP |
194 | struct resource *res; |
195 | struct usb_hcd *hcd; | |
196 | struct ehci_hcd *ehci; | |
197 | void __iomem *regs; | |
198 | int irq, err; | |
199 | ||
200 | if (usb_disabled()) | |
201 | return -ENODEV; | |
202 | ||
203 | pr_debug("Initializing Orion-SoC USB Host Controller\n"); | |
204 | ||
205 | irq = platform_get_irq(pdev, 0); | |
206 | if (irq <= 0) { | |
207 | dev_err(&pdev->dev, | |
208 | "Found HC with no IRQ. Check %s setup!\n", | |
209 | pdev->dev.bus_id); | |
210 | err = -ENODEV; | |
211 | goto err1; | |
212 | } | |
213 | ||
214 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
215 | if (!res) { | |
216 | dev_err(&pdev->dev, | |
217 | "Found HC with no register addr. Check %s setup!\n", | |
218 | pdev->dev.bus_id); | |
219 | err = -ENODEV; | |
220 | goto err1; | |
221 | } | |
222 | ||
223 | if (!request_mem_region(res->start, res->end - res->start + 1, | |
224 | ehci_orion_hc_driver.description)) { | |
225 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
226 | err = -EBUSY; | |
227 | goto err1; | |
228 | } | |
229 | ||
230 | regs = ioremap(res->start, res->end - res->start + 1); | |
231 | if (regs == NULL) { | |
232 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
233 | err = -EFAULT; | |
234 | goto err2; | |
235 | } | |
236 | ||
237 | hcd = usb_create_hcd(&ehci_orion_hc_driver, | |
238 | &pdev->dev, pdev->dev.bus_id); | |
239 | if (!hcd) { | |
240 | err = -ENOMEM; | |
241 | goto err3; | |
242 | } | |
243 | ||
244 | hcd->rsrc_start = res->start; | |
245 | hcd->rsrc_len = res->end - res->start + 1; | |
246 | hcd->regs = regs; | |
247 | ||
248 | ehci = hcd_to_ehci(hcd); | |
249 | ehci->caps = hcd->regs + 0x100; | |
250 | ehci->regs = hcd->regs + 0x100 + | |
251 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
252 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
253 | ehci->is_tdi_rh_tt = 1; | |
254 | ehci->sbrn = 0x20; | |
255 | ||
92aecfa9 LB |
256 | /* |
257 | * (Re-)program MBUS remapping windows if we are asked to. | |
258 | */ | |
259 | if (pd != NULL && pd->dram != NULL) | |
260 | ehci_orion_conf_mbus_windows(hcd, pd->dram); | |
261 | ||
e96ffe2f TP |
262 | /* |
263 | * setup Orion USB controller | |
264 | */ | |
265 | orion_usb_setup(hcd); | |
266 | ||
267 | err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); | |
268 | if (err) | |
269 | goto err4; | |
270 | ||
271 | return 0; | |
272 | ||
273 | err4: | |
274 | usb_put_hcd(hcd); | |
275 | err3: | |
276 | iounmap(regs); | |
277 | err2: | |
278 | release_mem_region(res->start, res->end - res->start + 1); | |
279 | err1: | |
280 | dev_err(&pdev->dev, "init %s fail, %d\n", | |
281 | pdev->dev.bus_id, err); | |
282 | ||
283 | return err; | |
284 | } | |
285 | ||
286 | static int __exit ehci_orion_drv_remove(struct platform_device *pdev) | |
287 | { | |
288 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
289 | ||
290 | usb_remove_hcd(hcd); | |
291 | iounmap(hcd->regs); | |
292 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
293 | usb_put_hcd(hcd); | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | MODULE_ALIAS("platform:orion-ehci"); | |
299 | ||
300 | static struct platform_driver ehci_orion_driver = { | |
301 | .probe = ehci_orion_drv_probe, | |
302 | .remove = __exit_p(ehci_orion_drv_remove), | |
303 | .shutdown = usb_hcd_platform_shutdown, | |
304 | .driver.name = "orion-ehci", | |
305 | }; |