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Valentine Barshakda0e8fb2007-12-30 15:28:50 -08001/*
2 * EHCI HCD (Host Controller Driver) for USB.
3 *
4 * Bus Glue for PPC On-Chip EHCI driver on the of_platform bus
5 * Tested on AMCC PPC 440EPx
6 *
7 * Valentine Barshak <vbarshak@ru.mvista.com>
8 *
9 * Based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
10 * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
11 *
12 * This file is licenced under the GPL.
13 */
14
Thierry Reding148e1132013-01-21 11:09:22 +010015#include <linux/err.h>
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080016#include <linux/signal.h>
17
18#include <linux/of.h>
Rob Herring5af50732013-09-17 14:28:33 -050019#include <linux/of_address.h>
20#include <linux/of_irq.h>
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080021#include <linux/of_platform.h>
22
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080023
24static const struct hc_driver ehci_ppc_of_hc_driver = {
25 .description = hcd_name,
26 .product_desc = "OF EHCI",
27 .hcd_priv_size = sizeof(struct ehci_hcd),
28
29 /*
30 * generic hardware linkage
31 */
32 .irq = ehci_irq,
Greg Kroah-Hartmanc04ee4b2013-09-23 13:32:51 -070033 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080034
35 /*
36 * basic lifecycle operations
37 */
Alan Stern1a49e2a2012-07-09 15:55:14 -040038 .reset = ehci_setup,
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080039 .start = ehci_run,
40 .stop = ehci_stop,
41 .shutdown = ehci_shutdown,
42
43 /*
44 * managing i/o requests and associated device resources
45 */
46 .urb_enqueue = ehci_urb_enqueue,
47 .urb_dequeue = ehci_urb_dequeue,
48 .endpoint_disable = ehci_endpoint_disable,
Alan Sternb18ffd42009-05-27 18:21:56 -040049 .endpoint_reset = ehci_endpoint_reset,
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080050
51 /*
52 * scheduling support
53 */
54 .get_frame_number = ehci_get_frame,
55
56 /*
57 * root hub support
58 */
59 .hub_status_data = ehci_hub_status_data,
60 .hub_control = ehci_hub_control,
61#ifdef CONFIG_PM
62 .bus_suspend = ehci_bus_suspend,
63 .bus_resume = ehci_bus_resume,
64#endif
Alan Sterna8e51772008-05-20 16:58:11 -040065 .relinquish_port = ehci_relinquish_port,
Alan Stern3a311552008-05-20 16:58:29 -040066 .port_handed_over = ehci_port_handed_over,
Alan Stern914b7012009-06-29 10:47:30 -040067
68 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080069};
70
71
72/*
73 * 440EPx Errata USBH_3
74 * Fix: Enable Break Memory Transfer (BMT) in INSNREG3
75 */
76#define PPC440EPX_EHCI0_INSREG_BMT (0x1 << 0)
Bill Pemberton41ac7b32012-11-19 13:21:48 -050077static int
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080078ppc44x_enable_bmt(struct device_node *dn)
79{
80 __iomem u32 *insreg_virt;
81
82 insreg_virt = of_iomap(dn, 1);
83 if (!insreg_virt)
84 return -EINVAL;
85
86 out_be32(insreg_virt + 3, PPC440EPX_EHCI0_INSREG_BMT);
87
88 iounmap(insreg_virt);
89 return 0;
90}
91
92
Bill Pemberton41ac7b32012-11-19 13:21:48 -050093static int ehci_hcd_ppc_of_probe(struct platform_device *op)
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080094{
Grant Likely61c7a082010-04-13 16:12:29 -070095 struct device_node *dn = op->dev.of_node;
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080096 struct usb_hcd *hcd;
Vitaly Bordug796bcae2008-11-09 19:43:30 +010097 struct ehci_hcd *ehci = NULL;
Valentine Barshakda0e8fb2007-12-30 15:28:50 -080098 struct resource res;
99 int irq;
100 int rv;
101
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100102 struct device_node *np;
103
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800104 if (usb_disabled())
105 return -ENODEV;
106
107 dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
108
109 rv = of_address_to_resource(dn, 0, &res);
110 if (rv)
111 return rv;
112
113 hcd = usb_create_hcd(&ehci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
114 if (!hcd)
115 return -ENOMEM;
116
117 hcd->rsrc_start = res.start;
Joe Perches28f65c112011-06-09 09:13:32 -0700118 hcd->rsrc_len = resource_size(&res);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800119
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800120 irq = irq_of_parse_and_map(dn, 0);
121 if (irq == NO_IRQ) {
Jingoo Han346c8b22013-12-10 21:21:52 +0900122 dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n",
123 __FILE__);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800124 rv = -EBUSY;
125 goto err_irq;
126 }
127
Thierry Reding148e1132013-01-21 11:09:22 +0100128 hcd->regs = devm_ioremap_resource(&op->dev, &res);
129 if (IS_ERR(hcd->regs)) {
130 rv = PTR_ERR(hcd->regs);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800131 goto err_ioremap;
132 }
133
134 ehci = hcd_to_ehci(hcd);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100135 np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
136 if (np != NULL) {
137 /* claim we really affected by usb23 erratum */
138 if (!of_address_to_resource(np, 0, &res))
Julia Lawall1c5404f2012-07-30 16:43:45 +0200139 ehci->ohci_hcctrl_reg =
140 devm_ioremap(&op->dev,
141 res.start + OHCI_HCCTRL_OFFSET,
142 OHCI_HCCTRL_LEN);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100143 else
Joe Perchesf45ba772010-02-05 17:51:13 -0800144 pr_debug("%s: no ohci offset in fdt\n", __FILE__);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100145 if (!ehci->ohci_hcctrl_reg) {
Joe Perchesf45ba772010-02-05 17:51:13 -0800146 pr_debug("%s: ioremap for ohci hcctrl failed\n", __FILE__);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100147 } else {
148 ehci->has_amcc_usb23 = 1;
149 }
150 }
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800151
152 if (of_get_property(dn, "big-endian", NULL)) {
153 ehci->big_endian_mmio = 1;
154 ehci->big_endian_desc = 1;
155 }
156 if (of_get_property(dn, "big-endian-regs", NULL))
157 ehci->big_endian_mmio = 1;
158 if (of_get_property(dn, "big-endian-desc", NULL))
159 ehci->big_endian_desc = 1;
160
161 ehci->caps = hcd->regs;
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800162
163 if (of_device_is_compatible(dn, "ibm,usb-ehci-440epx")) {
164 rv = ppc44x_enable_bmt(dn);
165 ehci_dbg(ehci, "Break Memory Transfer (BMT) is %senabled!\n",
166 rv ? "NOT ": "");
167 }
168
169 rv = usb_add_hcd(hcd, irq, 0);
Dan Carpenter08a3b3b2010-08-14 11:06:19 +0200170 if (rv)
Julia Lawall1c5404f2012-07-30 16:43:45 +0200171 goto err_ioremap;
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800172
Peter Chen3c9740a2013-11-05 10:46:02 +0800173 device_wakeup_enable(hcd->self.controller);
Dan Carpenter08a3b3b2010-08-14 11:06:19 +0200174 return 0;
175
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800176err_ioremap:
177 irq_dispose_mapping(irq);
178err_irq:
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800179 usb_put_hcd(hcd);
180
181 return rv;
182}
183
184
Grant Likely2dc11582010-08-06 09:25:50 -0600185static int ehci_hcd_ppc_of_remove(struct platform_device *op)
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800186{
Jingoo Han477527b2013-05-23 19:18:39 +0900187 struct usb_hcd *hcd = platform_get_drvdata(op);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100188 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
189
190 struct device_node *np;
191 struct resource res;
192
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800193 dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
194
195 usb_remove_hcd(hcd);
196
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800197 irq_dispose_mapping(hcd->irq);
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800198
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100199 /* use request_mem_region to test if the ohci driver is loaded. if so
200 * ensure the ohci core is operational.
201 */
202 if (ehci->has_amcc_usb23) {
203 np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
204 if (np != NULL) {
205 if (!of_address_to_resource(np, 0, &res))
206 if (!request_mem_region(res.start,
207 0x4, hcd_name))
208 set_ohci_hcfs(ehci, 1);
209 else
210 release_mem_region(res.start, 0x4);
211 else
Joe Perchesf45ba772010-02-05 17:51:13 -0800212 pr_debug("%s: no ohci offset in fdt\n", __FILE__);
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100213 of_node_put(np);
214 }
Vitaly Bordug796bcae2008-11-09 19:43:30 +0100215 }
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800216 usb_put_hcd(hcd);
217
218 return 0;
219}
220
221
Németh Mártonc4386ad2010-01-10 15:35:03 +0100222static const struct of_device_id ehci_hcd_ppc_of_match[] = {
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800223 {
224 .compatible = "usb-ehci",
225 },
226 {},
227};
228MODULE_DEVICE_TABLE(of, ehci_hcd_ppc_of_match);
229
230
Grant Likelyd35fb642011-02-22 21:08:34 -0700231static struct platform_driver ehci_hcd_ppc_of_driver = {
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800232 .probe = ehci_hcd_ppc_of_probe,
233 .remove = ehci_hcd_ppc_of_remove,
Roger Quadrosaaf6b522013-07-22 15:04:50 +0300234 .shutdown = usb_hcd_platform_shutdown,
Grant Likely40182942010-04-13 16:13:02 -0700235 .driver = {
236 .name = "ppc-of-ehci",
237 .owner = THIS_MODULE,
238 .of_match_table = ehci_hcd_ppc_of_match,
Valentine Barshakda0e8fb2007-12-30 15:28:50 -0800239 },
240};