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7e6133aa DV |
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> | |
5a0e3ad6 | 19 | #include <linux/gfp.h> |
7e6133aa DV |
20 | #include <linux/dma-mapping.h> |
21 | #include <linux/uwb/umc.h> | |
22 | ||
23 | #include "../../wusbcore/wusbhc.h" | |
24 | ||
25 | #include "whcd.h" | |
26 | ||
27 | /* | |
28 | * Reset the host controller. | |
29 | */ | |
30 | static void whc_hw_reset(struct whc *whc) | |
31 | { | |
32 | le_writel(WUSBCMD_WHCRESET, whc->base + WUSBCMD); | |
33 | whci_wait_for(&whc->umc->dev, whc->base + WUSBCMD, WUSBCMD_WHCRESET, 0, | |
34 | 100, "reset"); | |
35 | } | |
36 | ||
37 | static void whc_hw_init_di_buf(struct whc *whc) | |
38 | { | |
39 | int d; | |
40 | ||
41 | /* Disable all entries in the Device Information buffer. */ | |
42 | for (d = 0; d < whc->n_devices; d++) | |
43 | whc->di_buf[d].addr_sec_info = WHC_DI_DISABLE; | |
44 | ||
45 | le_writeq(whc->di_buf_dma, whc->base + WUSBDEVICEINFOADDR); | |
46 | } | |
47 | ||
48 | static void whc_hw_init_dn_buf(struct whc *whc) | |
49 | { | |
50 | /* Clear the Device Notification buffer to ensure the V (valid) | |
51 | * bits are clear. */ | |
52 | memset(whc->dn_buf, 0, 4096); | |
53 | ||
54 | le_writeq(whc->dn_buf_dma, whc->base + WUSBDNTSBUFADDR); | |
55 | } | |
56 | ||
57 | int whc_init(struct whc *whc) | |
58 | { | |
59 | u32 whcsparams; | |
60 | int ret, i; | |
61 | resource_size_t start, len; | |
62 | ||
63 | spin_lock_init(&whc->lock); | |
64 | mutex_init(&whc->mutex); | |
65 | init_waitqueue_head(&whc->cmd_wq); | |
66 | init_waitqueue_head(&whc->async_list_wq); | |
67 | init_waitqueue_head(&whc->periodic_list_wq); | |
d35cbed6 | 68 | whc->workqueue = alloc_ordered_workqueue(dev_name(&whc->umc->dev), 0); |
7e6133aa DV |
69 | if (whc->workqueue == NULL) { |
70 | ret = -ENOMEM; | |
71 | goto error; | |
72 | } | |
73 | INIT_WORK(&whc->dn_work, whc_dn_work); | |
74 | ||
75 | INIT_WORK(&whc->async_work, scan_async_work); | |
76 | INIT_LIST_HEAD(&whc->async_list); | |
77 | INIT_LIST_HEAD(&whc->async_removed_list); | |
78 | ||
79 | INIT_WORK(&whc->periodic_work, scan_periodic_work); | |
80 | for (i = 0; i < 5; i++) | |
81 | INIT_LIST_HEAD(&whc->periodic_list[i]); | |
82 | INIT_LIST_HEAD(&whc->periodic_removed_list); | |
83 | ||
84 | /* Map HC registers. */ | |
85 | start = whc->umc->resource.start; | |
86 | len = whc->umc->resource.end - start + 1; | |
87 | if (!request_mem_region(start, len, "whci-hc")) { | |
88 | dev_err(&whc->umc->dev, "can't request HC region\n"); | |
89 | ret = -EBUSY; | |
90 | goto error; | |
91 | } | |
92 | whc->base_phys = start; | |
93 | whc->base = ioremap(start, len); | |
94 | if (!whc->base) { | |
95 | dev_err(&whc->umc->dev, "ioremap\n"); | |
96 | ret = -ENOMEM; | |
97 | goto error; | |
98 | } | |
99 | ||
100 | whc_hw_reset(whc); | |
101 | ||
102 | /* Read maximum number of devices, keys and MMC IEs. */ | |
103 | whcsparams = le_readl(whc->base + WHCSPARAMS); | |
104 | whc->n_devices = WHCSPARAMS_TO_N_DEVICES(whcsparams); | |
105 | whc->n_keys = WHCSPARAMS_TO_N_KEYS(whcsparams); | |
106 | whc->n_mmc_ies = WHCSPARAMS_TO_N_MMC_IES(whcsparams); | |
107 | ||
108 | dev_dbg(&whc->umc->dev, "N_DEVICES = %d, N_KEYS = %d, N_MMC_IES = %d\n", | |
109 | whc->n_devices, whc->n_keys, whc->n_mmc_ies); | |
110 | ||
111 | whc->qset_pool = dma_pool_create("qset", &whc->umc->dev, | |
112 | sizeof(struct whc_qset), 64, 0); | |
113 | if (whc->qset_pool == NULL) { | |
114 | ret = -ENOMEM; | |
115 | goto error; | |
116 | } | |
117 | ||
118 | ret = asl_init(whc); | |
119 | if (ret < 0) | |
120 | goto error; | |
121 | ret = pzl_init(whc); | |
122 | if (ret < 0) | |
123 | goto error; | |
124 | ||
125 | /* Allocate and initialize a buffer for generic commands, the | |
126 | Device Information buffer, and the Device Notification | |
127 | buffer. */ | |
128 | ||
129 | whc->gen_cmd_buf = dma_alloc_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN, | |
130 | &whc->gen_cmd_buf_dma, GFP_KERNEL); | |
131 | if (whc->gen_cmd_buf == NULL) { | |
132 | ret = -ENOMEM; | |
133 | goto error; | |
134 | } | |
135 | ||
136 | whc->dn_buf = dma_alloc_coherent(&whc->umc->dev, | |
137 | sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES, | |
138 | &whc->dn_buf_dma, GFP_KERNEL); | |
139 | if (!whc->dn_buf) { | |
140 | ret = -ENOMEM; | |
141 | goto error; | |
142 | } | |
143 | whc_hw_init_dn_buf(whc); | |
144 | ||
145 | whc->di_buf = dma_alloc_coherent(&whc->umc->dev, | |
146 | sizeof(struct di_buf_entry) * whc->n_devices, | |
147 | &whc->di_buf_dma, GFP_KERNEL); | |
148 | if (!whc->di_buf) { | |
149 | ret = -ENOMEM; | |
150 | goto error; | |
151 | } | |
152 | whc_hw_init_di_buf(whc); | |
153 | ||
154 | return 0; | |
155 | ||
156 | error: | |
157 | whc_clean_up(whc); | |
158 | return ret; | |
159 | } | |
160 | ||
161 | void whc_clean_up(struct whc *whc) | |
162 | { | |
163 | resource_size_t len; | |
164 | ||
165 | if (whc->di_buf) | |
166 | dma_free_coherent(&whc->umc->dev, sizeof(struct di_buf_entry) * whc->n_devices, | |
167 | whc->di_buf, whc->di_buf_dma); | |
168 | if (whc->dn_buf) | |
169 | dma_free_coherent(&whc->umc->dev, sizeof(struct dn_buf_entry) * WHC_N_DN_ENTRIES, | |
170 | whc->dn_buf, whc->dn_buf_dma); | |
171 | if (whc->gen_cmd_buf) | |
172 | dma_free_coherent(&whc->umc->dev, WHC_GEN_CMD_DATA_LEN, | |
173 | whc->gen_cmd_buf, whc->gen_cmd_buf_dma); | |
174 | ||
175 | pzl_clean_up(whc); | |
176 | asl_clean_up(whc); | |
177 | ||
03bce87c | 178 | dma_pool_destroy(whc->qset_pool); |
7e6133aa | 179 | |
28f65c11 | 180 | len = resource_size(&whc->umc->resource); |
7e6133aa DV |
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 | } |