diff options
Diffstat (limited to 'drivers/usb/host/whci/init.c')
-rw-r--r-- | drivers/usb/host/whci/init.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/usb/host/whci/init.c b/drivers/usb/host/whci/init.c new file mode 100644 index 000000000000..34a783cb0133 --- /dev/null +++ b/drivers/usb/host/whci/init.c | |||
@@ -0,0 +1,188 @@ | |||
1 | /* | ||
2 | * Wireless Host Controller (WHC) initialization. | ||
3 | * | ||
4 | * Copyright (C) 2007 Cambridge Silicon Radio Ltd. | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License version | ||
8 | * 2 as published by the Free Software Foundation. | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | * GNU General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU General Public License | ||
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | */ | ||
18 | #include <linux/kernel.h> | ||
19 | #include <linux/dma-mapping.h> | ||
20 | #include <linux/uwb/umc.h> | ||
21 | |||
22 | #include "../../wusbcore/wusbhc.h" | ||
23 | |||
24 | #include "whcd.h" | ||
25 | |||
26 | /* | ||
27 | * Reset the host controller. | ||
28 | */ | ||
29 | static void whc_hw_reset(struct whc *whc) | ||
30 | { | ||
31 | le_writel(WUSBCMD_WHCRESET, whc->base + WUSBCMD); | ||
32 | whci_wait_for(&whc->umc->dev, whc->base + WUSBCMD, WUSBCMD_WHCRESET, 0, | ||
33 | 100, "reset"); | ||
34 | } | ||
35 | |||
36 | static void whc_hw_init_di_buf(struct whc *whc) | ||
37 | { | ||
38 | int d; | ||
39 | |||
40 | /* Disable all entries in the Device Information buffer. */ | ||
41 | for (d = 0; d < whc->n_devices; d++) | ||
42 | whc->di_buf[d].addr_sec_info = WHC_DI_DISABLE; | ||
43 | |||
44 | le_writeq(whc->di_buf_dma, whc->base + WUSBDEVICEINFOADDR); | ||
45 | } | ||
46 | |||
47 | static void whc_hw_init_dn_buf(struct whc *whc) | ||
48 | { | ||
49 | /* Clear the Device Notification buffer to ensure the V (valid) | ||
50 | * bits are clear. */ | ||
51 | memset(whc->dn_buf, 0, 4096); | ||
52 | |||
53 | le_writeq(whc->dn_buf_dma, whc->base + WUSBDNTSBUFADDR); | ||
54 | } | ||
55 | |||
56 | int whc_init(struct whc *whc) | ||
57 | { | ||
58 | u32 whcsparams; | ||
59 | int ret, i; | ||
60 | resource_size_t start, len; | ||
61 | |||
62 | spin_lock_init(&whc->lock); | ||
63 | mutex_init(&whc->mutex); | ||
64 | init_waitqueue_head(&whc->cmd_wq); | ||
65 | init_waitqueue_head(&whc->async_list_wq); | ||
66 | init_waitqueue_head(&whc->periodic_list_wq); | ||
67 | whc->workqueue = create_singlethread_workqueue(dev_name(&whc->umc->dev)); | ||
68 | if (whc->workqueue == NULL) { | ||
69 | ret = -ENOMEM; | ||
70 | goto error; | ||
71 | } | ||
72 | INIT_WORK(&whc->dn_work, whc_dn_work); | ||
73 | |||
74 | INIT_WORK(&whc->async_work, scan_async_work); | ||
75 | INIT_LIST_HEAD(&whc->async_list); | ||
76 | INIT_LIST_HEAD(&whc->async_removed_list); | ||
77 | |||
78 | INIT_WORK(&whc->periodic_work, scan_periodic_work); | ||
79 | for (i = 0; i < 5; i++) | ||
80 | INIT_LIST_HEAD(&whc->periodic_list[i]); | ||
81 | INIT_LIST_HEAD(&whc->periodic_removed_list); | ||
82 | |||
83 | /* Map HC registers. */ | ||
84 | start = whc->umc->resource.start; | ||
85 | len = whc->umc->resource.end - start + 1; | ||
86 | if (!request_mem_region(start, len, "whci-hc")) { | ||
87 | dev_err(&whc->umc->dev, "can't request HC region\n"); | ||
88 | ret = -EBUSY; | ||
89 | goto error; | ||
90 | } | ||
91 | whc->base_phys = start; | ||
92 | whc->base = ioremap(start, len); | ||
93 | if (!whc->base) { | ||
94 | dev_err(&whc->umc->dev, "ioremap\n"); | ||
95 | ret = -ENOMEM; | ||
96 | goto error; | ||
97 | } | ||
98 | |||
99 | whc_hw_reset(whc); | ||
100 | |||
101 | /* Read maximum number of devices, keys and MMC IEs. */ | ||
102 | whcsparams = le_readl(whc->base + WHCSPARAMS); | ||
103 | whc->n_devices = WHCSPARAMS_TO_N_DEVICES(whcsparams); | ||
104 | whc->n_keys = WHCSPARAMS_TO_N_KEYS(whcsparams); | ||
105 | whc->n_mmc_ies = WHCSPARAMS_TO_N_MMC_IES(whcsparams); | ||
106 | |||
107 | dev_dbg(&whc->umc->dev, "N_DEVICES = %d, N_KEYS = %d, N_MMC_IES = %d\n", | ||
108 | whc->n_devices, whc->n_keys, whc->n_mmc_ies); | ||
109 | |||
110 | whc->qset_pool = dma_pool_create("qset", &whc->umc->dev, | ||
111 | sizeof(struct whc_qset), 64, 0); | ||
112 | if (whc->qset_pool == NULL) { | ||
113 | ret = -ENOMEM; | ||
114 | goto error; | ||
115 | } | ||
116 | |||
117 | ret = asl_init(whc); | ||
118 | if (ret < 0) | ||
119 | goto error; | ||
120 | ret = pzl_init(whc); | ||
121 | if (ret < 0) | ||
122 | goto error; | ||
123 | |||
124 | /* Allocate and initialize a buffer for generic commands, the | ||
125 | Device Information buffer, and the Device Notification | ||
126 | buffer. */ | ||
127 | |||
128 | whc->gen_cmd_buf = dma_alloc_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN, | ||
129 | &whc->gen_cmd_buf_dma, GFP_KERNEL); | ||
130 | if (whc->gen_cmd_buf == NULL) { | ||
131 | ret = -ENOMEM; | ||
132 | goto error; | ||
133 | } | ||
134 | |||
135 | whc->dn_buf = dma_alloc_coherent(&whc->umc->dev, | ||
136 | sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES, | ||
137 | &whc->dn_buf_dma, GFP_KERNEL); | ||
138 | if (!whc->dn_buf) { | ||
139 | ret = -ENOMEM; | ||
140 | goto error; | ||
141 | } | ||
142 | whc_hw_init_dn_buf(whc); | ||
143 | |||
144 | whc->di_buf = dma_alloc_coherent(&whc->umc->dev, | ||
145 | sizeof(struct di_buf_entry) * whc->n_devices, | ||
146 | &whc->di_buf_dma, GFP_KERNEL); | ||
147 | if (!whc->di_buf) { | ||
148 | ret = -ENOMEM; | ||
149 | goto error; | ||
150 | } | ||
151 | whc_hw_init_di_buf(whc); | ||
152 | |||
153 | return 0; | ||
154 | |||
155 | error: | ||
156 | whc_clean_up(whc); | ||
157 | return ret; | ||
158 | } | ||
159 | |||
160 | void whc_clean_up(struct whc *whc) | ||
161 | { | ||
162 | resource_size_t len; | ||
163 | |||
164 | if (whc->di_buf) | ||
165 | dma_free_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices, | ||
166 | whc->di_buf, whc->di_buf_dma); | ||
167 | if (whc->dn_buf) | ||
168 | dma_free_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES, | ||
169 | whc->dn_buf, whc->dn_buf_dma); | ||
170 | if (whc->gen_cmd_buf) | ||
171 | dma_free_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN, | ||
172 | whc->gen_cmd_buf, whc->gen_cmd_buf_dma); | ||
173 | |||
174 | pzl_clean_up(whc); | ||
175 | asl_clean_up(whc); | ||
176 | |||
177 | if (whc->qset_pool) | ||
178 | dma_pool_destroy(whc->qset_pool); | ||
179 | |||
180 | len = whc->umc->resource.end - whc->umc->resource.start + 1; | ||
181 | if (whc->base) | ||
182 | iounmap(whc->base); | ||
183 | if (whc->base_phys) | ||
184 | release_mem_region(whc->base_phys, len); | ||
185 | |||
186 | if (whc->workqueue) | ||
187 | destroy_workqueue(whc->workqueue); | ||
188 | } | ||