Commit | Line | Data |
---|---|---|
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> |
8c869eda | 15 | #include <linux/clk.h> |
c02cecb9 | 16 | #include <linux/platform_data/usb-ehci-orion.h> |
77dae54a AL |
17 | #include <linux/of.h> |
18 | #include <linux/of_device.h> | |
19 | #include <linux/of_irq.h> | |
a76dd463 MG |
20 | #include <linux/usb.h> |
21 | #include <linux/usb/hcd.h> | |
22 | #include <linux/io.h> | |
23 | #include <linux/dma-mapping.h> | |
24 | ||
25 | #include "ehci.h" | |
e96ffe2f TP |
26 | |
27 | #define rdl(off) __raw_readl(hcd->regs + (off)) | |
28 | #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) | |
29 | ||
e96ffe2f TP |
30 | #define USB_CMD 0x140 |
31 | #define USB_MODE 0x1a8 | |
92aecfa9 LB |
32 | #define USB_CAUSE 0x310 |
33 | #define USB_MASK 0x314 | |
34 | #define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4)) | |
35 | #define USB_WINDOW_BASE(i) (0x324 + ((i) << 4)) | |
e96ffe2f TP |
36 | #define USB_IPG 0x360 |
37 | #define USB_PHY_PWR_CTRL 0x400 | |
38 | #define USB_PHY_TX_CTRL 0x420 | |
39 | #define USB_PHY_RX_CTRL 0x430 | |
40 | #define USB_PHY_IVREF_CTRL 0x440 | |
41 | #define USB_PHY_TST_GRP_CTRL 0x450 | |
42 | ||
a76dd463 MG |
43 | #define DRIVER_DESC "EHCI orion driver" |
44 | ||
45 | static const char hcd_name[] = "ehci-orion"; | |
46 | ||
47 | static struct hc_driver __read_mostly ehci_orion_hc_driver; | |
48 | ||
e96ffe2f TP |
49 | /* |
50 | * Implement Orion USB controller specification guidelines | |
51 | */ | |
fb6f5529 | 52 | static void orion_usb_phy_v1_setup(struct usb_hcd *hcd) |
e96ffe2f | 53 | { |
fb6f5529 | 54 | /* The below GLs are according to the Orion Errata document */ |
e96ffe2f TP |
55 | /* |
56 | * Clear interrupt cause and mask | |
57 | */ | |
58 | wrl(USB_CAUSE, 0); | |
59 | wrl(USB_MASK, 0); | |
60 | ||
61 | /* | |
62 | * Reset controller | |
63 | */ | |
64 | wrl(USB_CMD, rdl(USB_CMD) | 0x2); | |
65 | while (rdl(USB_CMD) & 0x2); | |
66 | ||
67 | /* | |
68 | * GL# USB-10: Set IPG for non start of frame packets | |
69 | * Bits[14:8]=0xc | |
70 | */ | |
71 | wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); | |
72 | ||
73 | /* | |
74 | * GL# USB-9: USB 2.0 Power Control | |
75 | * BG_VSEL[7:6]=0x1 | |
76 | */ | |
77 | wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); | |
78 | ||
79 | /* | |
80 | * GL# USB-1: USB PHY Tx Control - force calibration to '8' | |
81 | * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 | |
82 | */ | |
83 | wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); | |
84 | ||
85 | /* | |
86 | * GL# USB-3 GL# USB-9: USB PHY Rx Control | |
87 | * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, | |
88 | * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 | |
89 | */ | |
90 | wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); | |
91 | ||
92 | /* | |
93 | * GL# USB-3 GL# USB-9: USB PHY IVREF Control | |
94 | * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 | |
95 | */ | |
96 | wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); | |
97 | ||
98 | /* | |
99 | * GL# USB-3 GL# USB-9: USB PHY Test Group Control | |
100 | * REG_FIFO_SQ_RST[15]=0 | |
101 | */ | |
102 | wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); | |
103 | ||
104 | /* | |
105 | * Stop and reset controller | |
106 | */ | |
107 | wrl(USB_CMD, rdl(USB_CMD) & ~0x1); | |
108 | wrl(USB_CMD, rdl(USB_CMD) | 0x2); | |
109 | while (rdl(USB_CMD) & 0x2); | |
110 | ||
111 | /* | |
112 | * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 | |
113 | * TBD: This need to be done after each reset! | |
114 | * GL# USB-4 Setup USB Host mode | |
115 | */ | |
116 | wrl(USB_MODE, 0x13); | |
117 | } | |
118 | ||
41ac7b3a | 119 | static void |
92aecfa9 | 120 | ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, |
63a9332b | 121 | const struct mbus_dram_target_info *dram) |
92aecfa9 LB |
122 | { |
123 | int i; | |
124 | ||
125 | for (i = 0; i < 4; i++) { | |
126 | wrl(USB_WINDOW_CTRL(i), 0); | |
127 | wrl(USB_WINDOW_BASE(i), 0); | |
128 | } | |
129 | ||
130 | for (i = 0; i < dram->num_cs; i++) { | |
63a9332b | 131 | const struct mbus_dram_window *cs = dram->cs + i; |
92aecfa9 LB |
132 | |
133 | wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | | |
134 | (cs->mbus_attr << 8) | | |
135 | (dram->mbus_dram_target_id << 4) | 1); | |
136 | wrl(USB_WINDOW_BASE(i), cs->base); | |
137 | } | |
138 | } | |
139 | ||
41ac7b3a | 140 | static int ehci_orion_drv_probe(struct platform_device *pdev) |
e96ffe2f | 141 | { |
92aecfa9 | 142 | struct orion_ehci_data *pd = pdev->dev.platform_data; |
63a9332b | 143 | const struct mbus_dram_target_info *dram; |
e96ffe2f TP |
144 | struct resource *res; |
145 | struct usb_hcd *hcd; | |
146 | struct ehci_hcd *ehci; | |
8c869eda | 147 | struct clk *clk; |
e96ffe2f TP |
148 | void __iomem *regs; |
149 | int irq, err; | |
77dae54a | 150 | enum orion_ehci_phy_ver phy_version; |
e96ffe2f TP |
151 | |
152 | if (usb_disabled()) | |
153 | return -ENODEV; | |
154 | ||
155 | pr_debug("Initializing Orion-SoC USB Host Controller\n"); | |
156 | ||
77dae54a AL |
157 | if (pdev->dev.of_node) |
158 | irq = irq_of_parse_and_map(pdev->dev.of_node, 0); | |
159 | else | |
160 | irq = platform_get_irq(pdev, 0); | |
e96ffe2f TP |
161 | if (irq <= 0) { |
162 | dev_err(&pdev->dev, | |
163 | "Found HC with no IRQ. Check %s setup!\n", | |
7071a3ce | 164 | dev_name(&pdev->dev)); |
e96ffe2f TP |
165 | err = -ENODEV; |
166 | goto err1; | |
167 | } | |
168 | ||
169 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
170 | if (!res) { | |
171 | dev_err(&pdev->dev, | |
172 | "Found HC with no register addr. Check %s setup!\n", | |
7071a3ce | 173 | dev_name(&pdev->dev)); |
e96ffe2f TP |
174 | err = -ENODEV; |
175 | goto err1; | |
176 | } | |
177 | ||
77dae54a AL |
178 | /* |
179 | * Right now device-tree probed devices don't get dma_mask | |
180 | * set. Since shared usb code relies on it, set it here for | |
181 | * now. Once we have dma capability bindings this can go away. | |
182 | */ | |
183 | if (!pdev->dev.dma_mask) | |
3b9561e9 SW |
184 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; |
185 | if (!pdev->dev.coherent_dma_mask) | |
186 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
77dae54a | 187 | |
5672b7e6 | 188 | if (!request_mem_region(res->start, resource_size(res), |
e96ffe2f TP |
189 | ehci_orion_hc_driver.description)) { |
190 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
191 | err = -EBUSY; | |
192 | goto err1; | |
193 | } | |
194 | ||
5672b7e6 | 195 | regs = ioremap(res->start, resource_size(res)); |
e96ffe2f TP |
196 | if (regs == NULL) { |
197 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
198 | err = -EFAULT; | |
199 | goto err2; | |
200 | } | |
201 | ||
8c869eda AL |
202 | /* Not all platforms can gate the clock, so it is not |
203 | an error if the clock does not exists. */ | |
204 | clk = clk_get(&pdev->dev, NULL); | |
205 | if (!IS_ERR(clk)) { | |
206 | clk_prepare_enable(clk); | |
207 | clk_put(clk); | |
208 | } | |
209 | ||
e96ffe2f | 210 | hcd = usb_create_hcd(&ehci_orion_hc_driver, |
7071a3ce | 211 | &pdev->dev, dev_name(&pdev->dev)); |
e96ffe2f TP |
212 | if (!hcd) { |
213 | err = -ENOMEM; | |
214 | goto err3; | |
215 | } | |
216 | ||
217 | hcd->rsrc_start = res->start; | |
5672b7e6 | 218 | hcd->rsrc_len = resource_size(res); |
e96ffe2f TP |
219 | hcd->regs = regs; |
220 | ||
221 | ehci = hcd_to_ehci(hcd); | |
222 | ehci->caps = hcd->regs + 0x100; | |
a8e51775 | 223 | hcd->has_tt = 1; |
e96ffe2f | 224 | |
92aecfa9 LB |
225 | /* |
226 | * (Re-)program MBUS remapping windows if we are asked to. | |
227 | */ | |
63a9332b AL |
228 | dram = mv_mbus_dram_info(); |
229 | if (dram) | |
230 | ehci_orion_conf_mbus_windows(hcd, dram); | |
92aecfa9 | 231 | |
e96ffe2f | 232 | /* |
fb6f5529 | 233 | * setup Orion USB controller. |
e96ffe2f | 234 | */ |
77dae54a AL |
235 | if (pdev->dev.of_node) |
236 | phy_version = EHCI_PHY_NA; | |
237 | else | |
238 | phy_version = pd->phy_version; | |
239 | ||
240 | switch (phy_version) { | |
fb6f5529 RS |
241 | case EHCI_PHY_NA: /* dont change USB phy settings */ |
242 | break; | |
243 | case EHCI_PHY_ORION: | |
244 | orion_usb_phy_v1_setup(hcd); | |
245 | break; | |
246 | case EHCI_PHY_DD: | |
247 | case EHCI_PHY_KW: | |
248 | default: | |
249 | printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n"); | |
250 | } | |
e96ffe2f | 251 | |
b5dd18d8 | 252 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
e96ffe2f TP |
253 | if (err) |
254 | goto err4; | |
255 | ||
256 | return 0; | |
257 | ||
258 | err4: | |
259 | usb_put_hcd(hcd); | |
260 | err3: | |
baffab28 SB |
261 | if (!IS_ERR(clk)) { |
262 | clk_disable_unprepare(clk); | |
263 | clk_put(clk); | |
264 | } | |
e96ffe2f TP |
265 | iounmap(regs); |
266 | err2: | |
5672b7e6 | 267 | release_mem_region(res->start, resource_size(res)); |
e96ffe2f TP |
268 | err1: |
269 | dev_err(&pdev->dev, "init %s fail, %d\n", | |
7071a3ce | 270 | dev_name(&pdev->dev), err); |
e96ffe2f TP |
271 | |
272 | return err; | |
273 | } | |
274 | ||
39d35681 | 275 | static int ehci_orion_drv_remove(struct platform_device *pdev) |
e96ffe2f TP |
276 | { |
277 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
8c869eda | 278 | struct clk *clk; |
e96ffe2f TP |
279 | |
280 | usb_remove_hcd(hcd); | |
281 | iounmap(hcd->regs); | |
282 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
283 | usb_put_hcd(hcd); | |
284 | ||
8c869eda AL |
285 | clk = clk_get(&pdev->dev, NULL); |
286 | if (!IS_ERR(clk)) { | |
287 | clk_disable_unprepare(clk); | |
288 | clk_put(clk); | |
289 | } | |
e96ffe2f TP |
290 | return 0; |
291 | } | |
292 | ||
59a609a9 | 293 | static const struct of_device_id ehci_orion_dt_ids[] = { |
77dae54a AL |
294 | { .compatible = "marvell,orion-ehci", }, |
295 | {}, | |
296 | }; | |
297 | MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids); | |
298 | ||
e96ffe2f TP |
299 | static struct platform_driver ehci_orion_driver = { |
300 | .probe = ehci_orion_drv_probe, | |
39d35681 | 301 | .remove = ehci_orion_drv_remove, |
e96ffe2f | 302 | .shutdown = usb_hcd_platform_shutdown, |
77dae54a AL |
303 | .driver = { |
304 | .name = "orion-ehci", | |
305 | .owner = THIS_MODULE, | |
a703d7e2 | 306 | .of_match_table = ehci_orion_dt_ids, |
77dae54a | 307 | }, |
e96ffe2f | 308 | }; |
a76dd463 MG |
309 | |
310 | static int __init ehci_orion_init(void) | |
311 | { | |
312 | if (usb_disabled()) | |
313 | return -ENODEV; | |
314 | ||
315 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
316 | ||
317 | ehci_init_driver(&ehci_orion_hc_driver, NULL); | |
318 | return platform_driver_register(&ehci_orion_driver); | |
319 | } | |
320 | module_init(ehci_orion_init); | |
321 | ||
322 | static void __exit ehci_orion_cleanup(void) | |
323 | { | |
324 | platform_driver_unregister(&ehci_orion_driver); | |
325 | } | |
326 | module_exit(ehci_orion_cleanup); | |
327 | ||
328 | MODULE_DESCRIPTION(DRIVER_DESC); | |
329 | MODULE_ALIAS("platform:orion-ehci"); | |
330 | MODULE_AUTHOR("Tzachi Perelstein"); | |
331 | MODULE_LICENSE("GPL v2"); |