Root/target/linux/brcm63xx/patches-3.0/010-add_bcm63xx_ohci_controller.patch

1Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
2---
3 drivers/usb/host/ohci-bcm63xx.c | 166 +++++++++++++++++++++++++++++++++++++++
4 drivers/usb/host/ohci-hcd.c | 5 +
5 drivers/usb/host/ohci.h | 2 +-
6 3 files changed, 172 insertions(+), 1 deletions(-)
7 create mode 100644 drivers/usb/host/ohci-bcm63xx.c
8
9--- /dev/null
10+++ b/drivers/usb/host/ohci-bcm63xx.c
11@@ -0,0 +1,166 @@
12+/*
13+ * This file is subject to the terms and conditions of the GNU General Public
14+ * License. See the file "COPYING" in the main directory of this archive
15+ * for more details.
16+ *
17+ * Copyright (C) 2010 Maxime Bizon <mbizon@freebox.fr>
18+ */
19+
20+#include <linux/init.h>
21+#include <linux/clk.h>
22+#include <linux/platform_device.h>
23+#include <bcm63xx_cpu.h>
24+#include <bcm63xx_regs.h>
25+#include <bcm63xx_io.h>
26+
27+static struct clk *usb_host_clock;
28+
29+static int __devinit ohci_bcm63xx_start(struct usb_hcd *hcd)
30+{
31+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
32+ int ret;
33+
34+ /*
35+ * port 2 can be shared with USB slave, but all boards seem to
36+ * have only one host port populated, so we can hardcode it
37+ */
38+ ohci->num_ports = 1;
39+
40+ ret = ohci_init(ohci);
41+ if (ret < 0)
42+ return ret;
43+
44+ ret = ohci_run(ohci);
45+ if (ret < 0) {
46+ err("can't start %s", hcd->self.bus_name);
47+ ohci_stop(hcd);
48+ return ret;
49+ }
50+ return 0;
51+}
52+
53+static const struct hc_driver ohci_bcm63xx_hc_driver = {
54+ .description = hcd_name,
55+ .product_desc = "BCM63XX integrated OHCI controller",
56+ .hcd_priv_size = sizeof(struct ohci_hcd),
57+
58+ .irq = ohci_irq,
59+ .flags = HCD_USB11 | HCD_MEMORY,
60+ .start = ohci_bcm63xx_start,
61+ .stop = ohci_stop,
62+ .shutdown = ohci_shutdown,
63+ .urb_enqueue = ohci_urb_enqueue,
64+ .urb_dequeue = ohci_urb_dequeue,
65+ .endpoint_disable = ohci_endpoint_disable,
66+ .get_frame_number = ohci_get_frame,
67+ .hub_status_data = ohci_hub_status_data,
68+ .hub_control = ohci_hub_control,
69+ .start_port_reset = ohci_start_port_reset,
70+};
71+
72+static int __devinit ohci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
73+{
74+ struct resource *res_mem;
75+ struct usb_hcd *hcd;
76+ struct ohci_hcd *ohci;
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+ if (BCMCPU_IS_6348()) {
86+ struct clk *clk;
87+ /* enable USB host clock */
88+ clk = clk_get(&pdev->dev, "usbh");
89+ if (IS_ERR(clk))
90+ return -ENODEV;
91+
92+ clk_enable(clk);
93+ usb_host_clock = clk;
94+ bcm_rset_writel(RSET_OHCI_PRIV, 0, OHCI_PRIV_REG);
95+
96+ } else if (BCMCPU_IS_6358()) {
97+ reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
98+ reg &= ~USBH_PRIV_SWAP_OHCI_ENDN_MASK;
99+ reg |= USBH_PRIV_SWAP_OHCI_DATA_MASK;
100+ bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG);
101+ /*
102+ * The magic value comes for the original vendor BSP
103+ * and is needed for USB to work. Datasheet does not
104+ * help, so the magic value is used as-is.
105+ */
106+ bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG);
107+ } else
108+ return 0;
109+
110+ hcd = usb_create_hcd(&ohci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx");
111+ if (!hcd)
112+ return -ENOMEM;
113+ hcd->rsrc_start = res_mem->start;
114+ hcd->rsrc_len = res_mem->end - res_mem->start + 1;
115+
116+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
117+ pr_debug("request_mem_region failed\n");
118+ ret = -EBUSY;
119+ goto out;
120+ }
121+
122+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
123+ if (!hcd->regs) {
124+ pr_debug("ioremap failed\n");
125+ ret = -EIO;
126+ goto out1;
127+ }
128+
129+ ohci = hcd_to_ohci(hcd);
130+ ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC |
131+ OHCI_QUIRK_FRAME_NO;
132+ ohci_hcd_init(ohci);
133+
134+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
135+ if (ret)
136+ goto out2;
137+
138+ platform_set_drvdata(pdev, hcd);
139+ return 0;
140+
141+out2:
142+ iounmap(hcd->regs);
143+out1:
144+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
145+out:
146+ usb_put_hcd(hcd);
147+ return ret;
148+}
149+
150+static int __devexit ohci_hcd_bcm63xx_drv_remove(struct platform_device *pdev)
151+{
152+ struct usb_hcd *hcd;
153+
154+ hcd = platform_get_drvdata(pdev);
155+ usb_remove_hcd(hcd);
156+ iounmap(hcd->regs);
157+ usb_put_hcd(hcd);
158+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
159+ if (usb_host_clock) {
160+ clk_disable(usb_host_clock);
161+ clk_put(usb_host_clock);
162+ }
163+ platform_set_drvdata(pdev, NULL);
164+ return 0;
165+}
166+
167+static struct platform_driver ohci_hcd_bcm63xx_driver = {
168+ .probe = ohci_hcd_bcm63xx_drv_probe,
169+ .remove = __devexit_p(ohci_hcd_bcm63xx_drv_remove),
170+ .shutdown = usb_hcd_platform_shutdown,
171+ .driver = {
172+ .name = "bcm63xx_ohci",
173+ .owner = THIS_MODULE,
174+ },
175+};
176+
177+MODULE_ALIAS("platform:bcm63xx_ohci");
178--- a/drivers/usb/host/ohci-hcd.c
179+++ b/drivers/usb/host/ohci-hcd.c
180@@ -1056,6 +1056,11 @@ MODULE_LICENSE ("GPL");
181 #define PLATFORM_DRIVER ohci_hcd_da8xx_driver
182 #endif
183 
184+#ifdef CONFIG_BCM63XX
185+#include "ohci-bcm63xx.c"
186+#define PLATFORM_DRIVER ohci_hcd_bcm63xx_driver
187+#endif
188+
189 #ifdef CONFIG_USB_OHCI_SH
190 #include "ohci-sh.c"
191 #define PLATFORM_DRIVER ohci_hcd_sh_driver
192--- a/drivers/usb/host/ohci.h
193+++ b/drivers/usb/host/ohci.h
194@@ -646,7 +646,7 @@ static inline u32 hc32_to_cpup (const st
195  * some big-endian SOC implementations. Same thing happens with PSW access.
196  */
197 
198-#ifdef CONFIG_PPC_MPC52xx
199+#if defined(CONFIG_PPC_MPC52xx) || defined(CONFIG_BCM63XX)
200 #define big_endian_frame_no_quirk(ohci) (ohci->flags & OHCI_QUIRK_FRAME_NO)
201 #else
202 #define big_endian_frame_no_quirk(ohci) 0
203

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