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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * c67x00-drv.c: Cypress C67X00 USB Common infrastructure
4 *
5 * Copyright (C) 2006-2008 Barco N.V.
6 * Derived from the Cypress cy7c67200/300 ezusb linux driver and
7 * based on multiple host controller drivers inside the linux kernel.
8 */
9
10/*
11 * This file implements the common infrastructure for using the c67x00.
12 * It is both the link between the platform configuration and subdrivers and
13 * the link between the common hardware parts and the subdrivers (e.g.
14 * interrupt handling).
15 *
16 * The c67x00 has 2 SIE's (serial interface engine) which can be configured
17 * to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG).
18 *
19 * Depending on the platform configuration, the SIE's are created and
20 * the corresponding subdriver is initialized (c67x00_probe_sie).
21 */
22
23#include <linux/device.h>
24#include <linux/io.h>
25#include <linux/list.h>
26#include <linux/slab.h>
27#include <linux/module.h>
28#include <linux/usb.h>
29#include <linux/usb/c67x00.h>
30
31#include "c67x00.h"
32#include "c67x00-hcd.h"
33
34static void c67x00_probe_sie(struct c67x00_sie *sie,
35 struct c67x00_device *dev, int sie_num)
36{
37 spin_lock_init(&sie->lock);
38 sie->dev = dev;
39 sie->sie_num = sie_num;
40 sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
41
42 switch (sie->mode) {
43 case C67X00_SIE_HOST:
44 c67x00_hcd_probe(sie);
45 break;
46
47 case C67X00_SIE_UNUSED:
48 dev_info(sie_dev(sie),
49 "Not using SIE %d as requested\n", sie->sie_num);
50 break;
51
52 default:
53 dev_err(sie_dev(sie),
54 "Unsupported configuration: 0x%x for SIE %d\n",
55 sie->mode, sie->sie_num);
56 break;
57 }
58}
59
60static void c67x00_remove_sie(struct c67x00_sie *sie)
61{
62 switch (sie->mode) {
63 case C67X00_SIE_HOST:
64 c67x00_hcd_remove(sie);
65 break;
66
67 default:
68 break;
69 }
70}
71
72static irqreturn_t c67x00_irq(int irq, void *__dev)
73{
74 struct c67x00_device *c67x00 = __dev;
75 struct c67x00_sie *sie;
76 u16 msg, int_status;
77 int i, count = 8;
78
79 int_status = c67x00_ll_hpi_status(c67x00);
80 if (!int_status)
81 return IRQ_NONE;
82
83 while (int_status != 0 && (count-- >= 0)) {
84 c67x00_ll_irq(c67x00, int_status);
85 for (i = 0; i < C67X00_SIES; i++) {
86 sie = &c67x00->sie[i];
87 msg = 0;
88 if (int_status & SIEMSG_FLG(i))
89 msg = c67x00_ll_fetch_siemsg(c67x00, i);
90 if (sie->irq)
91 sie->irq(sie, int_status, msg);
92 }
93 int_status = c67x00_ll_hpi_status(c67x00);
94 }
95
96 if (int_status)
97 dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
98 "status = 0x%04x\n", int_status);
99
100 return IRQ_HANDLED;
101}
102
103/* ------------------------------------------------------------------------- */
104
105static int c67x00_drv_probe(struct platform_device *pdev)
106{
107 struct c67x00_device *c67x00;
108 struct c67x00_platform_data *pdata;
109 struct resource *res, *res2;
110 int ret, i;
111
112 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
113 if (!res)
114 return -ENODEV;
115
116 res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
117 if (!res2)
118 return -ENODEV;
119
120 pdata = dev_get_platdata(&pdev->dev);
121 if (!pdata)
122 return -ENODEV;
123
124 c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
125 if (!c67x00)
126 return -ENOMEM;
127
128 if (!request_mem_region(res->start, resource_size(res),
129 pdev->name)) {
130 dev_err(&pdev->dev, "Memory region busy\n");
131 ret = -EBUSY;
132 goto request_mem_failed;
133 }
134 c67x00->hpi.base = ioremap(res->start, resource_size(res));
135 if (!c67x00->hpi.base) {
136 dev_err(&pdev->dev, "Unable to map HPI registers\n");
137 ret = -EIO;
138 goto map_failed;
139 }
140
141 spin_lock_init(&c67x00->hpi.lock);
142 c67x00->hpi.regstep = pdata->hpi_regstep;
143 c67x00->pdata = dev_get_platdata(&pdev->dev);
144 c67x00->pdev = pdev;
145
146 c67x00_ll_init(c67x00);
147 c67x00_ll_hpi_reg_init(c67x00);
148
149 ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
150 if (ret) {
151 dev_err(&pdev->dev, "Cannot claim IRQ\n");
152 goto request_irq_failed;
153 }
154
155 ret = c67x00_ll_reset(c67x00);
156 if (ret) {
157 dev_err(&pdev->dev, "Device reset failed\n");
158 goto reset_failed;
159 }
160
161 for (i = 0; i < C67X00_SIES; i++)
162 c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
163
164 platform_set_drvdata(pdev, c67x00);
165
166 return 0;
167
168 reset_failed:
169 free_irq(res2->start, c67x00);
170 request_irq_failed:
171 iounmap(c67x00->hpi.base);
172 map_failed:
173 release_mem_region(res->start, resource_size(res));
174 request_mem_failed:
175 kfree(c67x00);
176
177 return ret;
178}
179
180static void c67x00_drv_remove(struct platform_device *pdev)
181{
182 struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
183 struct resource *res;
184 int i;
185
186 for (i = 0; i < C67X00_SIES; i++)
187 c67x00_remove_sie(&c67x00->sie[i]);
188
189 c67x00_ll_release(c67x00);
190
191 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
192 free_irq(res->start, c67x00);
193
194 iounmap(c67x00->hpi.base);
195
196 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
197 release_mem_region(res->start, resource_size(res));
198
199 kfree(c67x00);
200}
201
202static struct platform_driver c67x00_driver = {
203 .probe = c67x00_drv_probe,
204 .remove_new = c67x00_drv_remove,
205 .driver = {
206 .name = "c67x00",
207 },
208};
209
210module_platform_driver(c67x00_driver);
211
212MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
213MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
214MODULE_LICENSE("GPL");
215MODULE_ALIAS("platform:c67x00");
1/*
2 * c67x00-drv.c: Cypress C67X00 USB Common infrastructure
3 *
4 * Copyright (C) 2006-2008 Barco N.V.
5 * Derived from the Cypress cy7c67200/300 ezusb linux driver and
6 * based on multiple host controller drivers inside the linux kernel.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
21 * MA 02110-1301 USA.
22 */
23
24/*
25 * This file implements the common infrastructure for using the c67x00.
26 * It is both the link between the platform configuration and subdrivers and
27 * the link between the common hardware parts and the subdrivers (e.g.
28 * interrupt handling).
29 *
30 * The c67x00 has 2 SIE's (serial interface engine) which can be configured
31 * to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG).
32 *
33 * Depending on the platform configuration, the SIE's are created and
34 * the corresponding subdriver is initialized (c67x00_probe_sie).
35 */
36
37#include <linux/device.h>
38#include <linux/io.h>
39#include <linux/list.h>
40#include <linux/slab.h>
41#include <linux/module.h>
42#include <linux/usb.h>
43#include <linux/usb/c67x00.h>
44
45#include "c67x00.h"
46#include "c67x00-hcd.h"
47
48static void c67x00_probe_sie(struct c67x00_sie *sie,
49 struct c67x00_device *dev, int sie_num)
50{
51 spin_lock_init(&sie->lock);
52 sie->dev = dev;
53 sie->sie_num = sie_num;
54 sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
55
56 switch (sie->mode) {
57 case C67X00_SIE_HOST:
58 c67x00_hcd_probe(sie);
59 break;
60
61 case C67X00_SIE_UNUSED:
62 dev_info(sie_dev(sie),
63 "Not using SIE %d as requested\n", sie->sie_num);
64 break;
65
66 default:
67 dev_err(sie_dev(sie),
68 "Unsupported configuration: 0x%x for SIE %d\n",
69 sie->mode, sie->sie_num);
70 break;
71 }
72}
73
74static void c67x00_remove_sie(struct c67x00_sie *sie)
75{
76 switch (sie->mode) {
77 case C67X00_SIE_HOST:
78 c67x00_hcd_remove(sie);
79 break;
80
81 default:
82 break;
83 }
84}
85
86static irqreturn_t c67x00_irq(int irq, void *__dev)
87{
88 struct c67x00_device *c67x00 = __dev;
89 struct c67x00_sie *sie;
90 u16 msg, int_status;
91 int i, count = 8;
92
93 int_status = c67x00_ll_hpi_status(c67x00);
94 if (!int_status)
95 return IRQ_NONE;
96
97 while (int_status != 0 && (count-- >= 0)) {
98 c67x00_ll_irq(c67x00, int_status);
99 for (i = 0; i < C67X00_SIES; i++) {
100 sie = &c67x00->sie[i];
101 msg = 0;
102 if (int_status & SIEMSG_FLG(i))
103 msg = c67x00_ll_fetch_siemsg(c67x00, i);
104 if (sie->irq)
105 sie->irq(sie, int_status, msg);
106 }
107 int_status = c67x00_ll_hpi_status(c67x00);
108 }
109
110 if (int_status)
111 dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
112 "status = 0x%04x\n", int_status);
113
114 return IRQ_HANDLED;
115}
116
117/* ------------------------------------------------------------------------- */
118
119static int c67x00_drv_probe(struct platform_device *pdev)
120{
121 struct c67x00_device *c67x00;
122 struct c67x00_platform_data *pdata;
123 struct resource *res, *res2;
124 int ret, i;
125
126 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
127 if (!res)
128 return -ENODEV;
129
130 res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
131 if (!res2)
132 return -ENODEV;
133
134 pdata = dev_get_platdata(&pdev->dev);
135 if (!pdata)
136 return -ENODEV;
137
138 c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
139 if (!c67x00)
140 return -ENOMEM;
141
142 if (!request_mem_region(res->start, resource_size(res),
143 pdev->name)) {
144 dev_err(&pdev->dev, "Memory region busy\n");
145 ret = -EBUSY;
146 goto request_mem_failed;
147 }
148 c67x00->hpi.base = ioremap(res->start, resource_size(res));
149 if (!c67x00->hpi.base) {
150 dev_err(&pdev->dev, "Unable to map HPI registers\n");
151 ret = -EIO;
152 goto map_failed;
153 }
154
155 spin_lock_init(&c67x00->hpi.lock);
156 c67x00->hpi.regstep = pdata->hpi_regstep;
157 c67x00->pdata = dev_get_platdata(&pdev->dev);
158 c67x00->pdev = pdev;
159
160 c67x00_ll_init(c67x00);
161 c67x00_ll_hpi_reg_init(c67x00);
162
163 ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
164 if (ret) {
165 dev_err(&pdev->dev, "Cannot claim IRQ\n");
166 goto request_irq_failed;
167 }
168
169 ret = c67x00_ll_reset(c67x00);
170 if (ret) {
171 dev_err(&pdev->dev, "Device reset failed\n");
172 goto reset_failed;
173 }
174
175 for (i = 0; i < C67X00_SIES; i++)
176 c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
177
178 platform_set_drvdata(pdev, c67x00);
179
180 return 0;
181
182 reset_failed:
183 free_irq(res2->start, c67x00);
184 request_irq_failed:
185 iounmap(c67x00->hpi.base);
186 map_failed:
187 release_mem_region(res->start, resource_size(res));
188 request_mem_failed:
189 kfree(c67x00);
190
191 return ret;
192}
193
194static int c67x00_drv_remove(struct platform_device *pdev)
195{
196 struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
197 struct resource *res;
198 int i;
199
200 for (i = 0; i < C67X00_SIES; i++)
201 c67x00_remove_sie(&c67x00->sie[i]);
202
203 c67x00_ll_release(c67x00);
204
205 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
206 if (res)
207 free_irq(res->start, c67x00);
208
209 iounmap(c67x00->hpi.base);
210
211 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
212 if (res)
213 release_mem_region(res->start, resource_size(res));
214
215 kfree(c67x00);
216
217 return 0;
218}
219
220static struct platform_driver c67x00_driver = {
221 .probe = c67x00_drv_probe,
222 .remove = c67x00_drv_remove,
223 .driver = {
224 .name = "c67x00",
225 },
226};
227
228module_platform_driver(c67x00_driver);
229
230MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
231MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
232MODULE_LICENSE("GPL");
233MODULE_ALIAS("platform:c67x00");