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common: Drop asm/global_data.h from common header
[u-boot.git] / drivers / usb / host / ehci-fsl.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2009, 2011, 2016 Freescale Semiconductor, Inc.
4  *
5  * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
6  *
7  * Author: Tor Krill [email protected]
8  */
9
10 #include <common.h>
11 #include <env.h>
12 #include <log.h>
13 #include <pci.h>
14 #include <usb.h>
15 #include <asm/global_data.h>
16 #include <asm/io.h>
17 #include <linux/delay.h>
18 #include <usb/ehci-ci.h>
19 #include <hwconfig.h>
20 #include <fsl_usb.h>
21 #include <fdt_support.h>
22 #include <dm.h>
23
24 #include "ehci.h"
25
26 DECLARE_GLOBAL_DATA_PTR;
27
28 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
29 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
30 #endif
31
32 #if CONFIG_IS_ENABLED(DM_USB)
33 struct ehci_fsl_priv {
34         struct ehci_ctrl ehci;
35         fdt_addr_t hcd_base;
36         char *phy_type;
37 };
38 #endif
39
40 static void set_txfifothresh(struct usb_ehci *, u32);
41 #if CONFIG_IS_ENABLED(DM_USB)
42 static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci,
43                   struct ehci_hccr *hccr, struct ehci_hcor *hcor);
44 #else
45 static int ehci_fsl_init(int index, struct usb_ehci *ehci,
46                          struct ehci_hccr *hccr, struct ehci_hcor *hcor);
47 #endif
48
49 /* Check USB PHY clock valid */
50 static int usb_phy_clk_valid(struct usb_ehci *ehci)
51 {
52         if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
53                         in_be32(&ehci->prictrl))) {
54                 printf("USB PHY clock invalid!\n");
55                 return 0;
56         } else {
57                 return 1;
58         }
59 }
60
61 #if CONFIG_IS_ENABLED(DM_USB)
62 static int ehci_fsl_of_to_plat(struct udevice *dev)
63 {
64         struct ehci_fsl_priv *priv = dev_get_priv(dev);
65         const void *prop;
66
67         prop = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy_type",
68                            NULL);
69         if (prop) {
70                 priv->phy_type = (char *)prop;
71                 debug("phy_type %s\n", priv->phy_type);
72         }
73
74         return 0;
75 }
76
77 static int ehci_fsl_init_after_reset(struct ehci_ctrl *ctrl)
78 {
79         struct usb_ehci *ehci = NULL;
80         struct ehci_fsl_priv *priv = container_of(ctrl, struct ehci_fsl_priv,
81                                                    ehci);
82 #ifdef CONFIG_PPC
83         ehci = (struct usb_ehci *)lower_32_bits(priv->hcd_base);
84 #else
85         ehci = (struct usb_ehci *)priv->hcd_base;
86 #endif
87
88         if (ehci_fsl_init(priv, ehci, priv->ehci.hccr, priv->ehci.hcor) < 0)
89                 return -ENXIO;
90
91         return 0;
92 }
93
94 static const struct ehci_ops fsl_ehci_ops = {
95         .init_after_reset = ehci_fsl_init_after_reset,
96 };
97
98 static int ehci_fsl_probe(struct udevice *dev)
99 {
100         struct ehci_fsl_priv *priv = dev_get_priv(dev);
101         struct usb_ehci *ehci = NULL;
102         struct ehci_hccr *hccr;
103         struct ehci_hcor *hcor;
104         struct ehci_ctrl *ehci_ctrl = &priv->ehci;
105
106         /*
107          * Get the base address for EHCI controller from the device node
108          */
109         priv->hcd_base = dev_read_addr(dev);
110         if (priv->hcd_base == FDT_ADDR_T_NONE) {
111                 debug("Can't get the EHCI register base address\n");
112                 return -ENXIO;
113         }
114 #ifdef CONFIG_PPC
115         ehci = (struct usb_ehci *)lower_32_bits(priv->hcd_base);
116 #else
117         ehci = (struct usb_ehci *)priv->hcd_base;
118 #endif
119         hccr = (struct ehci_hccr *)(&ehci->caplength);
120         hcor = (struct ehci_hcor *)
121                 ((void *)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
122
123         ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275();
124
125         if (ehci_fsl_init(priv, ehci, hccr, hcor) < 0)
126                 return -ENXIO;
127
128         debug("ehci-fsl: init hccr %p and hcor %p hc_length %d\n",
129               (void *)hccr, (void *)hcor,
130               HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
131
132         return ehci_register(dev, hccr, hcor, &fsl_ehci_ops, 0, USB_INIT_HOST);
133 }
134
135 static const struct udevice_id ehci_usb_ids[] = {
136         { .compatible = "fsl-usb2-mph", },
137         { .compatible = "fsl-usb2-dr", },
138         { }
139 };
140
141 U_BOOT_DRIVER(ehci_fsl) = {
142         .name   = "ehci_fsl",
143         .id     = UCLASS_USB,
144         .of_match = ehci_usb_ids,
145         .of_to_plat = ehci_fsl_of_to_plat,
146         .probe = ehci_fsl_probe,
147         .remove = ehci_deregister,
148         .ops    = &ehci_usb_ops,
149         .plat_auto      = sizeof(struct usb_plat),
150         .priv_auto      = sizeof(struct ehci_fsl_priv),
151         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
152 };
153 #else
154 /*
155  * Create the appropriate control structures to manage
156  * a new EHCI host controller.
157  *
158  * Excerpts from linux ehci fsl driver.
159  */
160 int ehci_hcd_init(int index, enum usb_init_type init,
161                 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
162 {
163         struct ehci_ctrl *ehci_ctrl = container_of(hccr,
164                                         struct ehci_ctrl, hccr);
165         struct usb_ehci *ehci = NULL;
166
167         switch (index) {
168         case 0:
169                 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
170                 break;
171         case 1:
172                 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
173                 break;
174         default:
175                 printf("ERROR: wrong controller index!!\n");
176                 return -EINVAL;
177         };
178
179         *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
180         *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
181                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
182
183         ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275();
184
185         return ehci_fsl_init(index, ehci, *hccr, *hcor);
186 }
187
188 /*
189  * Destroy the appropriate control structures corresponding
190  * the the EHCI host controller.
191  */
192 int ehci_hcd_stop(int index)
193 {
194         return 0;
195 }
196 #endif
197
198 #if CONFIG_IS_ENABLED(DM_USB)
199 static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci,
200                   struct ehci_hccr *hccr, struct ehci_hcor *hcor)
201 #else
202 static int ehci_fsl_init(int index, struct usb_ehci *ehci,
203                          struct ehci_hccr *hccr, struct ehci_hcor *hcor)
204 #endif
205 {
206         const char *phy_type = NULL;
207 #if !CONFIG_IS_ENABLED(DM_USB)
208         size_t len;
209         char current_usb_controller[5];
210 #endif
211 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
212         char usb_phy[5];
213
214         usb_phy[0] = '\0';
215 #endif
216         if (has_erratum_a007075()) {
217                 /*
218                  * A 5ms delay is needed after applying soft-reset to the
219                  * controller to let external ULPI phy come out of reset.
220                  * This delay needs to be added before re-initializing
221                  * the controller after soft-resetting completes
222                  */
223                 mdelay(5);
224         }
225
226         /* Set to Host mode */
227         setbits_le32(&ehci->usbmode, CM_HOST);
228
229         out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
230         out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
231
232         /* Init phy */
233 #if CONFIG_IS_ENABLED(DM_USB)
234         if (priv->phy_type)
235                 phy_type = priv->phy_type;
236 #else
237         memset(current_usb_controller, '\0', 5);
238         snprintf(current_usb_controller, sizeof(current_usb_controller),
239                  "usb%d", index+1);
240
241         if (hwconfig_sub(current_usb_controller, "phy_type"))
242                 phy_type = hwconfig_subarg(current_usb_controller,
243                                 "phy_type", &len);
244 #endif
245         else
246                 phy_type = env_get("usb_phy_type");
247
248         if (!phy_type) {
249 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
250                 /* if none specified assume internal UTMI */
251                 strcpy(usb_phy, "utmi");
252                 phy_type = usb_phy;
253 #else
254                 printf("WARNING: USB phy type not defined !!\n");
255                 return -1;
256 #endif
257         }
258
259         if (!strncmp(phy_type, "utmi", 4)) {
260 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
261                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
262                                 PHY_CLK_SEL_UTMI);
263                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
264                                 UTMI_PHY_EN);
265                 udelay(1000); /* delay required for PHY Clk to appear */
266 #endif
267                 out_le32(&(hcor)->or_portsc[0], PORT_PTS_UTMI);
268                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
269                                 USB_EN);
270         } else {
271                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
272                                 PHY_CLK_SEL_ULPI);
273                 clrsetbits_be32(&ehci->control, UTMI_PHY_EN |
274                                 CONTROL_REGISTER_W1C_MASK, USB_EN);
275                 udelay(1000); /* delay required for PHY Clk to appear */
276                 if (!usb_phy_clk_valid(ehci))
277                         return -EINVAL;
278                 out_le32(&(hcor)->or_portsc[0], PORT_PTS_ULPI);
279         }
280
281         out_be32(&ehci->prictrl, 0x0000000c);
282         out_be32(&ehci->age_cnt_limit, 0x00000040);
283         out_be32(&ehci->sictrl, 0x00000001);
284
285         in_le32(&ehci->usbmode);
286
287         if (has_erratum_a007798())
288                 set_txfifothresh(ehci, TXFIFOTHRESH);
289
290         if (has_erratum_a004477()) {
291                 /*
292                  * When reset is issued while any ULPI transaction is ongoing
293                  * then it may result to corruption of ULPI Function Control
294                  * Register which eventually causes phy clock to enter low
295                  * power mode which stops the clock. Thus delay is required
296                  * before reset to let ongoing ULPI transaction complete.
297                  */
298                 udelay(1);
299         }
300         return 0;
301 }
302
303 /*
304  * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
305  * to counter DDR latencies in writing data into Tx buffer.
306  * This prevents Tx buffer from getting underrun
307  */
308 static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
309 {
310         u32 cmd;
311         cmd = ehci_readl(&ehci->txfilltuning);
312         cmd &= ~TXFIFO_THRESH_MASK;
313         cmd |= TXFIFO_THRESH(txfifo_thresh);
314         ehci_writel(&ehci->txfilltuning, cmd);
315 }
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