summaryrefslogtreecommitdiffstats
path: root/target/linux/brcm63xx/files-2.6.30/drivers/usb/host/ohci-bcm63xx.c
blob: 08807d98993ca4635a5f0519e051bb831ba6e4a7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 */

#include <linux/init.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <bcm63xx_cpu.h>
#include <bcm63xx_regs.h>
#include <bcm63xx_io.h>

static struct clk *usb_host_clock;

static int __devinit ohci_bcm63xx_start(struct usb_hcd *hcd)
{
	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
	int ret;

	ret = ohci_init(ohci);
	if (ret < 0)
		return ret;

	/* FIXME: autodetected port 2 is shared with USB slave */

	ret = ohci_run(ohci);
	if (ret < 0) {
		err("can't start %s", hcd->self.bus_name);
		ohci_stop(hcd);
		return ret;
	}
	return 0;
}

static const struct hc_driver ohci_bcm63xx_hc_driver = {
	.description =		hcd_name,
	.product_desc =		"BCM63XX integrated OHCI controller",
	.hcd_priv_size =	sizeof(struct ohci_hcd),

	.irq =			ohci_irq,
	.flags =		HCD_USB11 | HCD_MEMORY,
	.start =		ohci_bcm63xx_start,
	.stop =			ohci_stop,
	.shutdown =		ohci_shutdown,
	.urb_enqueue =		ohci_urb_enqueue,
	.urb_dequeue =		ohci_urb_dequeue,
	.endpoint_disable =	ohci_endpoint_disable,
	.get_frame_number =	ohci_get_frame,
	.hub_status_data =	ohci_hub_status_data,
	.hub_control =		ohci_hub_control,
	.start_port_reset =	ohci_start_port_reset,
};

static int __devinit ohci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
{
	struct resource *res_mem, *res_irq;
	struct usb_hcd *hcd;
	struct ohci_hcd *ohci;
	u32 reg;
	int ret;

	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res_mem || !res_irq)
		return -ENODEV;

	if (BCMCPU_IS_6348()) {
		struct clk *clk;
		/* enable USB host clock */
		clk = clk_get(&pdev->dev, "usbh");
		if (IS_ERR(clk))
			return -ENODEV;

		clk_enable(clk);
		usb_host_clock = clk;
		bcm_rset_writel(RSET_OHCI_PRIV, 0, OHCI_PRIV_REG);

	} else if (BCMCPU_IS_6358()) {
		reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
		reg &= ~USBH_PRIV_SWAP_OHCI_ENDN_MASK;
		reg |= USBH_PRIV_SWAP_OHCI_DATA_MASK;
		bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG);
		/* don't ask... */
		bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG);
	} else
		return 0;

	hcd = usb_create_hcd(&ohci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx");
	if (!hcd)
		return -ENOMEM;
	hcd->rsrc_start = res_mem->start;
	hcd->rsrc_len = res_mem->end - res_mem->start + 1;

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		pr_debug("request_mem_region failed\n");
		ret = -EBUSY;
		goto out;
	}

	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		pr_debug("ioremap failed\n");
		ret = -EIO;
		goto out1;
	}

	ohci = hcd_to_ohci(hcd);
	ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC |
		OHCI_QUIRK_FRAME_NO;
	ohci_hcd_init(ohci);

	ret = usb_add_hcd(hcd, res_irq->start, IRQF_DISABLED);
	if (ret)
		goto out2;

	platform_set_drvdata(pdev, hcd);
	return 0;

out2:
	iounmap(hcd->regs);
out1:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
out:
	usb_put_hcd(hcd);
	return ret;
}

static int __devexit ohci_hcd_bcm63xx_drv_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd;

	hcd = platform_get_drvdata(pdev);
	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	usb_put_hcd(hcd);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	if (usb_host_clock) {
		clk_disable(usb_host_clock);
		clk_put(usb_host_clock);
	}
	platform_set_drvdata(pdev, NULL);
	return 0;
}

static struct platform_driver ohci_hcd_bcm63xx_driver = {
	.probe		= ohci_hcd_bcm63xx_drv_probe,
	.remove		= __devexit_p(ohci_hcd_bcm63xx_drv_remove),
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.name	= "bcm63xx_ohci",
		.owner	= THIS_MODULE,
		.bus	= &platform_bus_type
	},
};

MODULE_ALIAS("platform:bcm63xx_ohci");