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8e77da68 SH |
1 | /* |
2 | * arch/arm/mach-netx/xc.c | |
3 | * | |
4 | * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix | |
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 version 2 | |
8 | * 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, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
20 | #include <linux/init.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/firmware.h> | |
23 | #include <linux/mutex.h> | |
24 | ||
25 | #include <asm/io.h> | |
26 | #include <asm/hardware.h> | |
27 | #include <asm/arch/netx-regs.h> | |
28 | ||
29 | #include <asm/arch/xc.h> | |
30 | ||
31 | static DEFINE_MUTEX(xc_lock); | |
32 | ||
33 | static int xc_in_use = 0; | |
34 | ||
35 | struct fw_desc { | |
36 | unsigned int ofs; | |
37 | unsigned int size; | |
38 | unsigned int patch_ofs; | |
39 | unsigned int patch_entries; | |
40 | }; | |
41 | ||
42 | struct fw_header { | |
43 | unsigned int magic; | |
44 | unsigned int type; | |
45 | unsigned int version; | |
46 | unsigned int reserved[5]; | |
47 | struct fw_desc fw_desc[3]; | |
48 | } __attribute__ ((packed)); | |
49 | ||
50 | int xc_stop(struct xc *x) | |
51 | { | |
52 | writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); | |
53 | writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); | |
54 | writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); | |
55 | return 0; | |
56 | } | |
57 | ||
58 | int xc_start(struct xc *x) | |
59 | { | |
60 | writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); | |
61 | writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); | |
62 | writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | int xc_running(struct xc *x) | |
67 | { | |
68 | return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC) | |
69 | || (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC) | |
70 | || (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ? | |
71 | 0 : 1; | |
72 | } | |
73 | ||
74 | int xc_reset(struct xc *x) | |
75 | { | |
76 | writel(0, x->xpec_base + NETX_XPEC_PC_OFS); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size) | |
81 | { | |
82 | if (adr >= NETX_PA_XMAC(x->no) && | |
83 | adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE) | |
84 | return 0; | |
85 | ||
86 | if (adr >= NETX_PA_XPEC(x->no) && | |
87 | adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE) | |
88 | return 0; | |
89 | ||
90 | dev_err(x->dev, "Illegal pointer in firmware found. aborting\n"); | |
91 | ||
92 | return -1; | |
93 | } | |
94 | ||
95 | static int xc_patch(struct xc *x, void *patch, int count) | |
96 | { | |
97 | unsigned int val, adr; | |
98 | unsigned int *data = patch; | |
99 | ||
100 | int i; | |
101 | for (i = 0; i < count; i++) { | |
102 | adr = *data++; | |
103 | val = *data++; | |
104 | if (xc_check_ptr(x, adr, 4) < 0) | |
105 | return -EINVAL; | |
106 | ||
107 | writel(val, (void __iomem *)io_p2v(adr)); | |
108 | } | |
109 | return 0; | |
110 | } | |
111 | ||
112 | int xc_request_firmware(struct xc *x) | |
113 | { | |
114 | int ret; | |
115 | char name[16]; | |
116 | const struct firmware *fw; | |
117 | struct fw_header *head; | |
118 | unsigned int size; | |
119 | int i; | |
120 | void *src; | |
121 | unsigned long dst; | |
122 | ||
123 | sprintf(name, "xc%d.bin", x->no); | |
124 | ||
125 | ret = request_firmware(&fw, name, x->dev); | |
126 | ||
127 | if (ret < 0) { | |
128 | dev_err(x->dev, "request_firmware failed\n"); | |
129 | return ret; | |
130 | } | |
131 | ||
132 | head = (struct fw_header *)fw->data; | |
133 | if (head->magic != 0x4e657458) { | |
134 | if (head->magic == 0x5874654e) { | |
135 | dev_err(x->dev, | |
136 | "firmware magic is 'XteN'. Endianess problems?\n"); | |
137 | ret = -ENODEV; | |
138 | goto exit_release_firmware; | |
139 | } | |
140 | dev_err(x->dev, "unrecognized firmware magic 0x%08x\n", | |
141 | head->magic); | |
142 | ret = -ENODEV; | |
143 | goto exit_release_firmware; | |
144 | } | |
145 | ||
146 | x->type = head->type; | |
147 | x->version = head->version; | |
148 | ||
149 | ret = -EINVAL; | |
150 | ||
151 | for (i = 0; i < 3; i++) { | |
152 | src = fw->data + head->fw_desc[i].ofs; | |
153 | dst = *(unsigned int *)src; | |
154 | src += sizeof (unsigned int); | |
155 | size = head->fw_desc[i].size - sizeof (unsigned int); | |
156 | ||
157 | if (xc_check_ptr(x, dst, size)) | |
158 | goto exit_release_firmware; | |
159 | ||
160 | memcpy((void *)io_p2v(dst), src, size); | |
161 | ||
162 | src = fw->data + head->fw_desc[i].patch_ofs; | |
163 | size = head->fw_desc[i].patch_entries; | |
164 | ret = xc_patch(x, src, size); | |
165 | if (ret < 0) | |
166 | goto exit_release_firmware; | |
167 | } | |
168 | ||
169 | ret = 0; | |
170 | ||
171 | exit_release_firmware: | |
172 | release_firmware(fw); | |
173 | ||
174 | return ret; | |
175 | } | |
176 | ||
177 | struct xc *request_xc(int xcno, struct device *dev) | |
178 | { | |
179 | struct xc *x = NULL; | |
180 | ||
181 | mutex_lock(&xc_lock); | |
182 | ||
183 | if (xcno > 3) | |
184 | goto exit; | |
185 | if (xc_in_use & (1 << xcno)) | |
186 | goto exit; | |
187 | ||
188 | x = kmalloc(sizeof (struct xc), GFP_KERNEL); | |
189 | if (!x) | |
190 | goto exit; | |
191 | ||
192 | if (!request_mem_region | |
193 | (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, dev->kobj.name)) | |
194 | goto exit_free; | |
195 | ||
196 | if (!request_mem_region | |
197 | (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, dev->kobj.name)) | |
198 | goto exit_release_1; | |
199 | ||
200 | if (!request_mem_region | |
201 | (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, dev->kobj.name)) | |
202 | goto exit_release_2; | |
203 | ||
204 | x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno)); | |
205 | x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno)); | |
206 | x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); | |
207 | if (!x->sram_base) | |
208 | goto exit_release_3; | |
209 | ||
210 | x->irq = NETX_IRQ_XPEC(xcno); | |
211 | ||
212 | x->no = xcno; | |
213 | x->dev = dev; | |
214 | ||
215 | xc_in_use |= (1 << xcno); | |
216 | ||
217 | goto exit; | |
218 | ||
219 | exit_release_3: | |
220 | release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); | |
221 | exit_release_2: | |
222 | release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); | |
223 | exit_release_1: | |
224 | release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); | |
225 | exit_free: | |
226 | kfree(x); | |
227 | x = NULL; | |
228 | exit: | |
229 | mutex_unlock(&xc_lock); | |
230 | return x; | |
231 | } | |
232 | ||
233 | void free_xc(struct xc *x) | |
234 | { | |
235 | int xcno = x->no; | |
236 | ||
237 | mutex_lock(&xc_lock); | |
238 | ||
239 | iounmap(x->sram_base); | |
240 | release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); | |
241 | release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); | |
242 | release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); | |
243 | xc_in_use &= ~(1 << x->no); | |
244 | kfree(x); | |
245 | ||
246 | mutex_unlock(&xc_lock); | |
247 | } | |
248 | ||
249 | EXPORT_SYMBOL(free_xc); | |
250 | EXPORT_SYMBOL(request_xc); | |
251 | EXPORT_SYMBOL(xc_request_firmware); | |
252 | EXPORT_SYMBOL(xc_reset); | |
253 | EXPORT_SYMBOL(xc_running); | |
254 | EXPORT_SYMBOL(xc_start); | |
255 | EXPORT_SYMBOL(xc_stop); |