Root/target/linux/brcm63xx/patches-2.6.32/011-add_bcm63xx_ehci_controller.patch

1Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
2---
3 drivers/usb/host/ehci-bcm63xx.c | 154 +++++++++++++++++++++++++++++++++++++++
4 drivers/usb/host/ehci-hcd.c | 5 +
5 2 files changed, 159 insertions(+), 0 deletions(-)
6 create mode 100644 drivers/usb/host/ehci-bcm63xx.c
7
8--- /dev/null
9+++ b/drivers/usb/host/ehci-bcm63xx.c
10@@ -0,0 +1,154 @@
11+/*
12+ * This file is subject to the terms and conditions of the GNU General Public
13+ * License. See the file "COPYING" in the main directory of this archive
14+ * for more details.
15+ *
16+ * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
17+ */
18+
19+#include <linux/init.h>
20+#include <linux/platform_device.h>
21+#include <bcm63xx_cpu.h>
22+#include <bcm63xx_regs.h>
23+#include <bcm63xx_io.h>
24+
25+static int ehci_bcm63xx_setup(struct usb_hcd *hcd)
26+{
27+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
28+ int retval;
29+
30+ retval = ehci_halt(ehci);
31+ if (retval)
32+ return retval;
33+
34+ retval = ehci_init(hcd);
35+ if (retval)
36+ return retval;
37+
38+ ehci_reset(ehci);
39+ ehci_port_power(ehci, 0);
40+
41+ return retval;
42+}
43+
44+
45+static const struct hc_driver ehci_bcm63xx_hc_driver = {
46+ .description = hcd_name,
47+ .product_desc = "BCM63XX integrated EHCI controller",
48+ .hcd_priv_size = sizeof(struct ehci_hcd),
49+
50+ .irq = ehci_irq,
51+ .flags = HCD_MEMORY | HCD_USB2,
52+
53+ .reset = ehci_bcm63xx_setup,
54+ .start = ehci_run,
55+ .stop = ehci_stop,
56+ .shutdown = ehci_shutdown,
57+
58+ .urb_enqueue = ehci_urb_enqueue,
59+ .urb_dequeue = ehci_urb_dequeue,
60+ .endpoint_disable = ehci_endpoint_disable,
61+
62+ .get_frame_number = ehci_get_frame,
63+
64+ .hub_status_data = ehci_hub_status_data,
65+ .hub_control = ehci_hub_control,
66+ .bus_suspend = ehci_bus_suspend,
67+ .bus_resume = ehci_bus_resume,
68+ .relinquish_port = ehci_relinquish_port,
69+ .port_handed_over = ehci_port_handed_over,
70+};
71+
72+static int __devinit ehci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
73+{
74+ struct resource *res_mem;
75+ struct usb_hcd *hcd;
76+ struct ehci_hcd *ehci;
77+ u32 reg;
78+ int ret, irq;
79+
80+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
81+ irq = platform_get_irq(pdev, 0);;
82+ if (!res_mem || irq < 0)
83+ return -ENODEV;
84+
85+ reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
86+ reg &= ~USBH_PRIV_SWAP_EHCI_DATA_MASK;
87+ reg |= USBH_PRIV_SWAP_EHCI_ENDN_MASK;
88+ bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG);
89+
90+ /*
91+ * The magic value comes for the original vendor BSP and is
92+ * needed for USB to work. Datasheet does not help, so the
93+ * magic value is used as-is.
94+ */
95+ bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG);
96+
97+ hcd = usb_create_hcd(&ehci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx");
98+ if (!hcd)
99+ return -ENOMEM;
100+ hcd->rsrc_start = res_mem->start;
101+ hcd->rsrc_len = res_mem->end - res_mem->start + 1;
102+
103+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
104+ pr_debug("request_mem_region failed\n");
105+ ret = -EBUSY;
106+ goto out;
107+ }
108+
109+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
110+ if (!hcd->regs) {
111+ pr_debug("ioremap failed\n");
112+ ret = -EIO;
113+ goto out1;
114+ }
115+
116+ ehci = hcd_to_ehci(hcd);
117+ ehci->big_endian_mmio = 1;
118+ ehci->big_endian_desc = 0;
119+ ehci->caps = hcd->regs;
120+ ehci->regs = hcd->regs +
121+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
122+ ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
123+ ehci->sbrn = 0x20;
124+
125+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
126+ if (ret)
127+ goto out2;
128+
129+ platform_set_drvdata(pdev, hcd);
130+ return 0;
131+
132+out2:
133+ iounmap(hcd->regs);
134+out1:
135+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
136+out:
137+ usb_put_hcd(hcd);
138+ return ret;
139+}
140+
141+static int __devexit ehci_hcd_bcm63xx_drv_remove(struct platform_device *pdev)
142+{
143+ struct usb_hcd *hcd;
144+
145+ hcd = platform_get_drvdata(pdev);
146+ usb_remove_hcd(hcd);
147+ iounmap(hcd->regs);
148+ usb_put_hcd(hcd);
149+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
150+ platform_set_drvdata(pdev, NULL);
151+ return 0;
152+}
153+
154+static struct platform_driver ehci_hcd_bcm63xx_driver = {
155+ .probe = ehci_hcd_bcm63xx_drv_probe,
156+ .remove = __devexit_p(ehci_hcd_bcm63xx_drv_remove),
157+ .shutdown = usb_hcd_platform_shutdown,
158+ .driver = {
159+ .name = "bcm63xx_ehci",
160+ .owner = THIS_MODULE,
161+ },
162+};
163+
164+MODULE_ALIAS("platform:bcm63xx_ehci");
165--- a/drivers/usb/host/ehci-hcd.c
166+++ b/drivers/usb/host/ehci-hcd.c
167@@ -1141,6 +1141,11 @@ MODULE_LICENSE ("GPL");
168 #define PLATFORM_DRIVER ehci_atmel_driver
169 #endif
170 
171+#ifdef CONFIG_BCM63XX
172+#include "ehci-bcm63xx.c"
173+#define PLATFORM_DRIVER ehci_hcd_bcm63xx_driver
174+#endif
175+
176 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
177     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER)
178 #error "missing bus glue for ehci-hcd"
179

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