diff options
author | Ishizaki Kou <kou.ishizaki@toshiba.co.jp> | 2007-02-02 02:38:41 -0500 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2007-02-06 22:03:21 -0500 |
commit | 7163c7c9d266862ad9a0a0203d204113034cb5fb (patch) | |
tree | ce5aab574dc5d541701f86161e81b2b9a9eda9a1 | |
parent | 32f39b055f3b7af4ee76a93ede5450ab2549328a (diff) |
[POWERPC] Celleb: setup usb host controller in SCC
USB host controller in SCC requires enable sequence. It should be done
before USB host drivers start.
Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r-- | arch/powerpc/platforms/celleb/scc_uhc.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/celleb/scc_uhc.c b/arch/powerpc/platforms/celleb/scc_uhc.c new file mode 100644 index 000000000000..a7c548bde2e3 --- /dev/null +++ b/arch/powerpc/platforms/celleb/scc_uhc.c | |||
@@ -0,0 +1,94 @@ | |||
1 | /* | ||
2 | * SCC (Super Companion Chip) UHC setup | ||
3 | * | ||
4 | * (C) Copyright 2006-2007 TOSHIBA CORPORATION | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | |||
21 | #include <linux/kernel.h> | ||
22 | #include <linux/pci.h> | ||
23 | |||
24 | #include <asm/delay.h> | ||
25 | #include <asm/io.h> | ||
26 | #include <asm/machdep.h> | ||
27 | |||
28 | #include "scc.h" | ||
29 | |||
30 | #define UHC_RESET_WAIT_MAX 10000 | ||
31 | |||
32 | static inline int uhc_clkctrl_ready(u32 val) | ||
33 | { | ||
34 | const u32 mask = SCC_UHC_USBCEN | SCC_UHC_USBCEN; | ||
35 | return((val & mask) == mask); | ||
36 | } | ||
37 | |||
38 | /* | ||
39 | * UHC(usb host controler) enable function. | ||
40 | * affect to both of OHCI and EHCI core module. | ||
41 | */ | ||
42 | static void enable_scc_uhc(struct pci_dev *dev) | ||
43 | { | ||
44 | void __iomem *uhc_base; | ||
45 | u32 __iomem *uhc_clkctrl; | ||
46 | u32 __iomem *uhc_ecmode; | ||
47 | u32 val = 0; | ||
48 | int i; | ||
49 | |||
50 | if (!machine_is(celleb)) | ||
51 | return; | ||
52 | |||
53 | uhc_base = ioremap(pci_resource_start(dev, 0), | ||
54 | pci_resource_len(dev, 0)); | ||
55 | if (!uhc_base) { | ||
56 | printk(KERN_ERR "failed to map UHC register base.\n"); | ||
57 | return; | ||
58 | } | ||
59 | uhc_clkctrl = uhc_base + SCC_UHC_CKRCTRL; | ||
60 | uhc_ecmode = uhc_base + SCC_UHC_ECMODE; | ||
61 | |||
62 | /* setup for normal mode */ | ||
63 | val |= SCC_UHC_F48MCKLEN; | ||
64 | out_be32(uhc_clkctrl, val); | ||
65 | val |= SCC_UHC_PHY_SUSPEND_SEL; | ||
66 | out_be32(uhc_clkctrl, val); | ||
67 | udelay(10); | ||
68 | val |= SCC_UHC_PHYEN; | ||
69 | out_be32(uhc_clkctrl, val); | ||
70 | udelay(50); | ||
71 | |||
72 | /* disable reset */ | ||
73 | val |= SCC_UHC_HCLKEN; | ||
74 | out_be32(uhc_clkctrl, val); | ||
75 | val |= (SCC_UHC_USBCEN | SCC_UHC_USBEN); | ||
76 | out_be32(uhc_clkctrl, val); | ||
77 | i = 0; | ||
78 | while (!uhc_clkctrl_ready(in_be32(uhc_clkctrl))) { | ||
79 | udelay(10); | ||
80 | if (i++ > UHC_RESET_WAIT_MAX) { | ||
81 | printk(KERN_ERR "Failed to disable UHC reset %x\n", | ||
82 | in_be32(uhc_clkctrl)); | ||
83 | break; | ||
84 | } | ||
85 | } | ||
86 | |||
87 | /* Endian Conversion Mode for Master ALL area */ | ||
88 | out_be32(uhc_ecmode, SCC_UHC_ECMODE_BY_BYTE); | ||
89 | |||
90 | iounmap(uhc_base); | ||
91 | } | ||
92 | |||
93 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TOSHIBA_2, | ||
94 | PCI_DEVICE_ID_TOSHIBA_SCC_USB, enable_scc_uhc); | ||