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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> | |
14 | #include <asm/arch/orion.h> | |
15 | ||
16 | #define rdl(off) __raw_readl(hcd->regs + (off)) | |
17 | #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) | |
18 | ||
19 | #define USB_CAUSE 0x310 | |
20 | #define USB_MASK 0x314 | |
21 | #define USB_CMD 0x140 | |
22 | #define USB_MODE 0x1a8 | |
23 | #define USB_IPG 0x360 | |
24 | #define USB_PHY_PWR_CTRL 0x400 | |
25 | #define USB_PHY_TX_CTRL 0x420 | |
26 | #define USB_PHY_RX_CTRL 0x430 | |
27 | #define USB_PHY_IVREF_CTRL 0x440 | |
28 | #define USB_PHY_TST_GRP_CTRL 0x450 | |
29 | ||
30 | /* | |
31 | * Implement Orion USB controller specification guidelines | |
32 | */ | |
33 | static void orion_usb_setup(struct usb_hcd *hcd) | |
34 | { | |
35 | /* | |
36 | * Clear interrupt cause and mask | |
37 | */ | |
38 | wrl(USB_CAUSE, 0); | |
39 | wrl(USB_MASK, 0); | |
40 | ||
41 | /* | |
42 | * Reset controller | |
43 | */ | |
44 | wrl(USB_CMD, rdl(USB_CMD) | 0x2); | |
45 | while (rdl(USB_CMD) & 0x2); | |
46 | ||
47 | /* | |
48 | * GL# USB-10: Set IPG for non start of frame packets | |
49 | * Bits[14:8]=0xc | |
50 | */ | |
51 | wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); | |
52 | ||
53 | /* | |
54 | * GL# USB-9: USB 2.0 Power Control | |
55 | * BG_VSEL[7:6]=0x1 | |
56 | */ | |
57 | wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); | |
58 | ||
59 | /* | |
60 | * GL# USB-1: USB PHY Tx Control - force calibration to '8' | |
61 | * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 | |
62 | */ | |
63 | wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); | |
64 | ||
65 | /* | |
66 | * GL# USB-3 GL# USB-9: USB PHY Rx Control | |
67 | * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, | |
68 | * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 | |
69 | */ | |
70 | wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); | |
71 | ||
72 | /* | |
73 | * GL# USB-3 GL# USB-9: USB PHY IVREF Control | |
74 | * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 | |
75 | */ | |
76 | wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); | |
77 | ||
78 | /* | |
79 | * GL# USB-3 GL# USB-9: USB PHY Test Group Control | |
80 | * REG_FIFO_SQ_RST[15]=0 | |
81 | */ | |
82 | wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); | |
83 | ||
84 | /* | |
85 | * Stop and reset controller | |
86 | */ | |
87 | wrl(USB_CMD, rdl(USB_CMD) & ~0x1); | |
88 | wrl(USB_CMD, rdl(USB_CMD) | 0x2); | |
89 | while (rdl(USB_CMD) & 0x2); | |
90 | ||
91 | /* | |
92 | * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 | |
93 | * TBD: This need to be done after each reset! | |
94 | * GL# USB-4 Setup USB Host mode | |
95 | */ | |
96 | wrl(USB_MODE, 0x13); | |
97 | } | |
98 | ||
99 | static int ehci_orion_setup(struct usb_hcd *hcd) | |
100 | { | |
101 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
102 | int retval; | |
103 | ||
104 | retval = ehci_halt(ehci); | |
105 | if (retval) | |
106 | return retval; | |
107 | ||
108 | /* | |
109 | * data structure init | |
110 | */ | |
111 | retval = ehci_init(hcd); | |
112 | if (retval) | |
113 | return retval; | |
114 | ||
115 | ehci_reset(ehci); | |
116 | ehci_port_power(ehci, 0); | |
117 | ||
118 | return retval; | |
119 | } | |
120 | ||
121 | static const struct hc_driver ehci_orion_hc_driver = { | |
122 | .description = hcd_name, | |
123 | .product_desc = "Marvell Orion EHCI", | |
124 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
125 | ||
126 | /* | |
127 | * generic hardware linkage | |
128 | */ | |
129 | .irq = ehci_irq, | |
130 | .flags = HCD_MEMORY | HCD_USB2, | |
131 | ||
132 | /* | |
133 | * basic lifecycle operations | |
134 | */ | |
135 | .reset = ehci_orion_setup, | |
136 | .start = ehci_run, | |
137 | #ifdef CONFIG_PM | |
138 | .suspend = ehci_bus_suspend, | |
139 | .resume = ehci_bus_resume, | |
140 | #endif | |
141 | .stop = ehci_stop, | |
142 | .shutdown = ehci_shutdown, | |
143 | ||
144 | /* | |
145 | * managing i/o requests and associated device resources | |
146 | */ | |
147 | .urb_enqueue = ehci_urb_enqueue, | |
148 | .urb_dequeue = ehci_urb_dequeue, | |
149 | .endpoint_disable = ehci_endpoint_disable, | |
150 | ||
151 | /* | |
152 | * scheduling support | |
153 | */ | |
154 | .get_frame_number = ehci_get_frame, | |
155 | ||
156 | /* | |
157 | * root hub support | |
158 | */ | |
159 | .hub_status_data = ehci_hub_status_data, | |
160 | .hub_control = ehci_hub_control, | |
161 | .bus_suspend = ehci_bus_suspend, | |
162 | .bus_resume = ehci_bus_resume, | |
163 | }; | |
164 | ||
165 | static int __init ehci_orion_drv_probe(struct platform_device *pdev) | |
166 | { | |
167 | struct resource *res; | |
168 | struct usb_hcd *hcd; | |
169 | struct ehci_hcd *ehci; | |
170 | void __iomem *regs; | |
171 | int irq, err; | |
172 | ||
173 | if (usb_disabled()) | |
174 | return -ENODEV; | |
175 | ||
176 | pr_debug("Initializing Orion-SoC USB Host Controller\n"); | |
177 | ||
178 | irq = platform_get_irq(pdev, 0); | |
179 | if (irq <= 0) { | |
180 | dev_err(&pdev->dev, | |
181 | "Found HC with no IRQ. Check %s setup!\n", | |
182 | pdev->dev.bus_id); | |
183 | err = -ENODEV; | |
184 | goto err1; | |
185 | } | |
186 | ||
187 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
188 | if (!res) { | |
189 | dev_err(&pdev->dev, | |
190 | "Found HC with no register addr. Check %s setup!\n", | |
191 | pdev->dev.bus_id); | |
192 | err = -ENODEV; | |
193 | goto err1; | |
194 | } | |
195 | ||
196 | if (!request_mem_region(res->start, res->end - res->start + 1, | |
197 | ehci_orion_hc_driver.description)) { | |
198 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
199 | err = -EBUSY; | |
200 | goto err1; | |
201 | } | |
202 | ||
203 | regs = ioremap(res->start, res->end - res->start + 1); | |
204 | if (regs == NULL) { | |
205 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
206 | err = -EFAULT; | |
207 | goto err2; | |
208 | } | |
209 | ||
210 | hcd = usb_create_hcd(&ehci_orion_hc_driver, | |
211 | &pdev->dev, pdev->dev.bus_id); | |
212 | if (!hcd) { | |
213 | err = -ENOMEM; | |
214 | goto err3; | |
215 | } | |
216 | ||
217 | hcd->rsrc_start = res->start; | |
218 | hcd->rsrc_len = res->end - res->start + 1; | |
219 | hcd->regs = regs; | |
220 | ||
221 | ehci = hcd_to_ehci(hcd); | |
222 | ehci->caps = hcd->regs + 0x100; | |
223 | ehci->regs = hcd->regs + 0x100 + | |
224 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
225 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
226 | ehci->is_tdi_rh_tt = 1; | |
227 | ehci->sbrn = 0x20; | |
228 | ||
229 | /* | |
230 | * setup Orion USB controller | |
231 | */ | |
232 | orion_usb_setup(hcd); | |
233 | ||
234 | err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); | |
235 | if (err) | |
236 | goto err4; | |
237 | ||
238 | return 0; | |
239 | ||
240 | err4: | |
241 | usb_put_hcd(hcd); | |
242 | err3: | |
243 | iounmap(regs); | |
244 | err2: | |
245 | release_mem_region(res->start, res->end - res->start + 1); | |
246 | err1: | |
247 | dev_err(&pdev->dev, "init %s fail, %d\n", | |
248 | pdev->dev.bus_id, err); | |
249 | ||
250 | return err; | |
251 | } | |
252 | ||
253 | static int __exit ehci_orion_drv_remove(struct platform_device *pdev) | |
254 | { | |
255 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
256 | ||
257 | usb_remove_hcd(hcd); | |
258 | iounmap(hcd->regs); | |
259 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
260 | usb_put_hcd(hcd); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | MODULE_ALIAS("platform:orion-ehci"); | |
266 | ||
267 | static struct platform_driver ehci_orion_driver = { | |
268 | .probe = ehci_orion_drv_probe, | |
269 | .remove = __exit_p(ehci_orion_drv_remove), | |
270 | .shutdown = usb_hcd_platform_shutdown, | |
271 | .driver.name = "orion-ehci", | |
272 | }; |