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) which 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/slab.h>
41 #include <linux/module.h>
42 #include <linux/usb.h>
43 #include <linux/usb/c67x00.h>
46 #include "c67x00-hcd.h"
48 static void c67x00_probe_sie(struct c67x00_sie *sie,
49 struct c67x00_device *dev, int sie_num)
51 spin_lock_init(&sie->lock);
53 sie->sie_num = sie_num;
54 sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
58 c67x00_hcd_probe(sie);
61 case C67X00_SIE_UNUSED:
62 dev_info(sie_dev(sie),
63 "Not using SIE %d as requested\n", sie->sie_num);
68 "Unsupported configuration: 0x%x for SIE %d\n",
69 sie->mode, sie->sie_num);
74 static void c67x00_remove_sie(struct c67x00_sie *sie)
78 c67x00_hcd_remove(sie);
86 static irqreturn_t c67x00_irq(int irq, void *__dev)
88 struct c67x00_device *c67x00 = __dev;
89 struct c67x00_sie *sie;
93 int_status = c67x00_ll_hpi_status(c67x00);
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];
102 if (int_status & SIEMSG_FLG(i))
103 msg = c67x00_ll_fetch_siemsg(c67x00, i);
105 sie->irq(sie, int_status, msg);
107 int_status = c67x00_ll_hpi_status(c67x00);
111 dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! "
112 "status = 0x%04x\n", int_status);
117 /* ------------------------------------------------------------------------- */
119 static int c67x00_drv_probe(struct platform_device *pdev)
121 struct c67x00_device *c67x00;
122 struct c67x00_platform_data *pdata;
123 struct resource *res, *res2;
126 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
130 res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
134 pdata = dev_get_platdata(&pdev->dev);
138 c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL);
142 if (!request_mem_region(res->start, resource_size(res),
144 dev_err(&pdev->dev, "Memory region busy\n");
146 goto request_mem_failed;
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");
155 spin_lock_init(&c67x00->hpi.lock);
156 c67x00->hpi.regstep = pdata->hpi_regstep;
157 c67x00->pdata = dev_get_platdata(&pdev->dev);
160 c67x00_ll_init(c67x00);
161 c67x00_ll_hpi_reg_init(c67x00);
163 ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00);
165 dev_err(&pdev->dev, "Cannot claim IRQ\n");
166 goto request_irq_failed;
169 ret = c67x00_ll_reset(c67x00);
171 dev_err(&pdev->dev, "Device reset failed\n");
175 for (i = 0; i < C67X00_SIES; i++)
176 c67x00_probe_sie(&c67x00->sie[i], c67x00, i);
178 platform_set_drvdata(pdev, c67x00);
183 free_irq(res2->start, c67x00);
185 iounmap(c67x00->hpi.base);
187 release_mem_region(res->start, resource_size(res));
194 static int c67x00_drv_remove(struct platform_device *pdev)
196 struct c67x00_device *c67x00 = platform_get_drvdata(pdev);
197 struct resource *res;
200 for (i = 0; i < C67X00_SIES; i++)
201 c67x00_remove_sie(&c67x00->sie[i]);
203 c67x00_ll_release(c67x00);
205 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
207 free_irq(res->start, c67x00);
209 iounmap(c67x00->hpi.base);
211 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
213 release_mem_region(res->start, resource_size(res));
220 static struct platform_driver c67x00_driver = {
221 .probe = c67x00_drv_probe,
222 .remove = c67x00_drv_remove,
224 .owner = THIS_MODULE,
229 module_platform_driver(c67x00_driver);
231 MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
232 MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
233 MODULE_LICENSE("GPL");
234 MODULE_ALIAS("platform:c67x00");