2 * c67x00-drv.c: Cypress C67X00 USB Common infrastructure
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.
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.
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.
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,
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).
30 * The c67x00 has 2 SIE's (serial interface engine) wich can be configured
31 * to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG).
33 * Depending on the platform configuration, the SIE's are created and
34 * the corresponding subdriver is initialized (c67x00_probe_sie).
37 #include <linux/device.h>
39 #include <linux/list.h>
40 #include <linux/usb.h>
41 #include <linux/usb/c67x00.h>
44 #include "c67x00-hcd.h"
46 static void c67x00_probe_sie(struct c67x00_sie *sie,
47 struct c67x00_device *dev, int sie_num)
49 spin_lock_init(&sie->lock);
51 sie->sie_num = sie_num;
52 sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
56 c67x00_hcd_probe(sie);
59 case C67X00_SIE_UNUSED:
60 dev_info(sie_dev(sie),
61 "Not using SIE %d as requested\n", sie->sie_num);
66 "Unsupported configuration: 0x%x for SIE %d\n",
67 sie->mode, sie->sie_num);
72 static void c67x00_remove_sie(struct c67x00_sie *sie)
76 c67x00_hcd_remove(sie);
84 static irqreturn_t c67x00_irq(int irq, void *__dev)
86 struct c67x00_device *c67x00 = __dev;
87 struct c67x00_sie *sie;
91 int_status = c67x00_ll_hpi_status(c67x00);
95 while (int_status != 0 && (count-- >= 0)) {
96 c67x00_ll_irq(c67x00, int_status);
97 for (i = 0; i < C67X00_SIES; i++) {
98 sie = &c67x00->sie[i];
100 if (int_status & SIEMSG_FLG(i))
101 msg = c67x00_ll_fetch_siemsg(c67x00, i);
103 sie->irq(sie, int_status, msg);
105 int_status = c67x00_ll_hpi_status(c67x00);
109 dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
110 "status = 0x%04x\n", int_status);
115 /* ------------------------------------------------------------------------- */
117 static int __devinit c67x00_drv_probe(struct platform_device *pdev)
119 struct c67x00_device *c67x00;
120 struct c67x00_platform_data *pdata;
121 struct resource *res, *res2;
124 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
128 res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
132 pdata = pdev->dev.platform_data;
136 c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
140 if (!request_mem_region(res->start, res->end - res->start + 1,
142 dev_err(&pdev->dev, "Memory region busy\n");
144 goto request_mem_failed;
146 c67x00->hpi.base = ioremap(res->start, res->end - res->start + 1);
147 if (!c67x00->hpi.base) {
148 dev_err(&pdev->dev, "Unable to map HPI registers\n");
153 spin_lock_init(&c67x00->hpi.lock);
154 c67x00->hpi.regstep = pdata->hpi_regstep;
155 c67x00->pdata = pdev->dev.platform_data;
158 c67x00_ll_init(c67x00);
159 c67x00_ll_hpi_reg_init(c67x00);
161 ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
163 dev_err(&pdev->dev, "Cannot claim IRQ\n");
164 goto request_irq_failed;
167 ret = c67x00_ll_reset(c67x00);
169 dev_err(&pdev->dev, "Device reset failed\n");
173 for (i = 0; i < C67X00_SIES; i++)
174 c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
176 platform_set_drvdata(pdev, c67x00);
181 free_irq(res2->start, c67x00);
183 iounmap(c67x00->hpi.base);
185 release_mem_region(res->start, res->end - res->start + 1);
192 static int __devexit c67x00_drv_remove(struct platform_device *pdev)
194 struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
195 struct resource *res;
198 for (i = 0; i < C67X00_SIES; i++)
199 c67x00_remove_sie(&c67x00->sie[i]);
201 c67x00_ll_release(c67x00);
203 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
205 free_irq(res->start, c67x00);
207 iounmap(c67x00->hpi.base);
209 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
211 release_mem_region(res->start, res->end - res->start + 1);
218 static struct platform_driver c67x00_driver = {
219 .probe = c67x00_drv_probe,
220 .remove = __devexit_p(c67x00_drv_remove),
222 .owner = THIS_MODULE,
226 MODULE_ALIAS("platform:c67x00");
228 static int __init c67x00_init(void)
230 return platform_driver_register(&c67x00_driver);
233 static void __exit c67x00_exit(void)
235 platform_driver_unregister(&c67x00_driver);
238 module_init(c67x00_init);
239 module_exit(c67x00_exit);
241 MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
242 MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
243 MODULE_LICENSE("GPL");