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 | { |
d4f09e28 | 142 | struct orion_ehci_data *pd = dev_get_platdata(&pdev->dev); |
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 | 184 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; |
22d9d8e8 RK |
185 | err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
186 | if (err) | |
187 | goto err1; | |
77dae54a | 188 | |
5672b7e6 | 189 | if (!request_mem_region(res->start, resource_size(res), |
e96ffe2f TP |
190 | ehci_orion_hc_driver.description)) { |
191 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
192 | err = -EBUSY; | |
193 | goto err1; | |
194 | } | |
195 | ||
5672b7e6 | 196 | regs = ioremap(res->start, resource_size(res)); |
e96ffe2f TP |
197 | if (regs == NULL) { |
198 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
199 | err = -EFAULT; | |
200 | goto err2; | |
201 | } | |
202 | ||
8c869eda AL |
203 | /* Not all platforms can gate the clock, so it is not |
204 | an error if the clock does not exists. */ | |
205 | clk = clk_get(&pdev->dev, NULL); | |
206 | if (!IS_ERR(clk)) { | |
207 | clk_prepare_enable(clk); | |
208 | clk_put(clk); | |
209 | } | |
210 | ||
e96ffe2f | 211 | hcd = usb_create_hcd(&ehci_orion_hc_driver, |
7071a3ce | 212 | &pdev->dev, dev_name(&pdev->dev)); |
e96ffe2f TP |
213 | if (!hcd) { |
214 | err = -ENOMEM; | |
215 | goto err3; | |
216 | } | |
217 | ||
218 | hcd->rsrc_start = res->start; | |
5672b7e6 | 219 | hcd->rsrc_len = resource_size(res); |
e96ffe2f TP |
220 | hcd->regs = regs; |
221 | ||
222 | ehci = hcd_to_ehci(hcd); | |
223 | ehci->caps = hcd->regs + 0x100; | |
a8e51775 | 224 | hcd->has_tt = 1; |
e96ffe2f | 225 | |
92aecfa9 LB |
226 | /* |
227 | * (Re-)program MBUS remapping windows if we are asked to. | |
228 | */ | |
63a9332b AL |
229 | dram = mv_mbus_dram_info(); |
230 | if (dram) | |
231 | ehci_orion_conf_mbus_windows(hcd, dram); | |
92aecfa9 | 232 | |
e96ffe2f | 233 | /* |
fb6f5529 | 234 | * setup Orion USB controller. |
e96ffe2f | 235 | */ |
77dae54a AL |
236 | if (pdev->dev.of_node) |
237 | phy_version = EHCI_PHY_NA; | |
238 | else | |
239 | phy_version = pd->phy_version; | |
240 | ||
241 | switch (phy_version) { | |
fb6f5529 RS |
242 | case EHCI_PHY_NA: /* dont change USB phy settings */ |
243 | break; | |
244 | case EHCI_PHY_ORION: | |
245 | orion_usb_phy_v1_setup(hcd); | |
246 | break; | |
247 | case EHCI_PHY_DD: | |
248 | case EHCI_PHY_KW: | |
249 | default: | |
250 | printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n"); | |
251 | } | |
e96ffe2f | 252 | |
b5dd18d8 | 253 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
e96ffe2f TP |
254 | if (err) |
255 | goto err4; | |
256 | ||
257 | return 0; | |
258 | ||
259 | err4: | |
260 | usb_put_hcd(hcd); | |
261 | err3: | |
baffab28 SB |
262 | if (!IS_ERR(clk)) { |
263 | clk_disable_unprepare(clk); | |
264 | clk_put(clk); | |
265 | } | |
e96ffe2f TP |
266 | iounmap(regs); |
267 | err2: | |
5672b7e6 | 268 | release_mem_region(res->start, resource_size(res)); |
e96ffe2f TP |
269 | err1: |
270 | dev_err(&pdev->dev, "init %s fail, %d\n", | |
7071a3ce | 271 | dev_name(&pdev->dev), err); |
e96ffe2f TP |
272 | |
273 | return err; | |
274 | } | |
275 | ||
39d35681 | 276 | static int ehci_orion_drv_remove(struct platform_device *pdev) |
e96ffe2f TP |
277 | { |
278 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
8c869eda | 279 | struct clk *clk; |
e96ffe2f TP |
280 | |
281 | usb_remove_hcd(hcd); | |
282 | iounmap(hcd->regs); | |
283 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
284 | usb_put_hcd(hcd); | |
285 | ||
8c869eda AL |
286 | clk = clk_get(&pdev->dev, NULL); |
287 | if (!IS_ERR(clk)) { | |
288 | clk_disable_unprepare(clk); | |
289 | clk_put(clk); | |
290 | } | |
e96ffe2f TP |
291 | return 0; |
292 | } | |
293 | ||
59a609a9 | 294 | static const struct of_device_id ehci_orion_dt_ids[] = { |
77dae54a AL |
295 | { .compatible = "marvell,orion-ehci", }, |
296 | {}, | |
297 | }; | |
298 | MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids); | |
299 | ||
e96ffe2f TP |
300 | static struct platform_driver ehci_orion_driver = { |
301 | .probe = ehci_orion_drv_probe, | |
39d35681 | 302 | .remove = ehci_orion_drv_remove, |
e96ffe2f | 303 | .shutdown = usb_hcd_platform_shutdown, |
77dae54a AL |
304 | .driver = { |
305 | .name = "orion-ehci", | |
306 | .owner = THIS_MODULE, | |
a703d7e2 | 307 | .of_match_table = ehci_orion_dt_ids, |
77dae54a | 308 | }, |
e96ffe2f | 309 | }; |
a76dd463 MG |
310 | |
311 | static int __init ehci_orion_init(void) | |
312 | { | |
313 | if (usb_disabled()) | |
314 | return -ENODEV; | |
315 | ||
316 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
317 | ||
318 | ehci_init_driver(&ehci_orion_hc_driver, NULL); | |
319 | return platform_driver_register(&ehci_orion_driver); | |
320 | } | |
321 | module_init(ehci_orion_init); | |
322 | ||
323 | static void __exit ehci_orion_cleanup(void) | |
324 | { | |
325 | platform_driver_unregister(&ehci_orion_driver); | |
326 | } | |
327 | module_exit(ehci_orion_cleanup); | |
328 | ||
329 | MODULE_DESCRIPTION(DRIVER_DESC); | |
330 | MODULE_ALIAS("platform:orion-ehci"); | |
331 | MODULE_AUTHOR("Tzachi Perelstein"); | |
332 | MODULE_LICENSE("GPL v2"); |