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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 | #include <linux/slab.h> |
25 | #include <linux/io.h> |
26 | |
27 | #include <mach/hardware.h> |
28 | #include <mach/irqs.h> |
29 | #include <mach/netx-regs.h> |
30 | |
31 | #include <mach/xc.h> |
32 | |
33 | static DEFINE_MUTEX(xc_lock); |
34 | |
35 | static int xc_in_use = 0; |
36 | |
37 | struct fw_desc { |
38 | unsigned int ofs; |
39 | unsigned int size; |
40 | unsigned int patch_ofs; |
41 | unsigned int patch_entries; |
42 | }; |
43 | |
44 | struct fw_header { |
45 | unsigned int magic; |
46 | unsigned int type; |
47 | unsigned int version; |
48 | unsigned int reserved[5]; |
49 | struct fw_desc fw_desc[3]; |
50 | } __attribute__ ((packed)); |
51 | |
52 | int xc_stop(struct xc *x) |
53 | { |
54 | writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); |
55 | writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); |
56 | writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); |
57 | return 0; |
58 | } |
59 | |
60 | int xc_start(struct xc *x) |
61 | { |
62 | writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); |
63 | writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); |
64 | writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); |
65 | return 0; |
66 | } |
67 | |
68 | int xc_running(struct xc *x) |
69 | { |
70 | return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC) |
71 | || (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC) |
72 | || (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ? |
73 | 0 : 1; |
74 | } |
75 | |
76 | int xc_reset(struct xc *x) |
77 | { |
78 | writel(0, x->xpec_base + NETX_XPEC_PC_OFS); |
79 | return 0; |
80 | } |
81 | |
82 | static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size) |
83 | { |
84 | if (adr >= NETX_PA_XMAC(x->no) && |
85 | adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE) |
86 | return 0; |
87 | |
88 | if (adr >= NETX_PA_XPEC(x->no) && |
89 | adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE) |
90 | return 0; |
91 | |
92 | dev_err(x->dev, "Illegal pointer in firmware found. aborting\n"); |
93 | |
94 | return -1; |
95 | } |
96 | |
97 | static int xc_patch(struct xc *x, const void *patch, int count) |
98 | { |
99 | unsigned int val, adr; |
100 | const unsigned int *data = patch; |
101 | |
102 | int i; |
103 | for (i = 0; i < count; i++) { |
104 | adr = *data++; |
105 | val = *data++; |
106 | if (xc_check_ptr(x, adr, 4) < 0) |
107 | return -EINVAL; |
108 | |
109 | writel(val, (void __iomem *)io_p2v(adr)); |
110 | } |
111 | return 0; |
112 | } |
113 | |
114 | int xc_request_firmware(struct xc *x) |
115 | { |
116 | int ret; |
117 | char name[16]; |
118 | const struct firmware *fw; |
119 | struct fw_header *head; |
120 | unsigned int size; |
121 | int i; |
122 | const void *src; |
123 | unsigned long dst; |
124 | |
125 | sprintf(name, "xc%d.bin", x->no); |
126 | |
127 | ret = request_firmware(&fw, name, x->dev); |
128 | |
129 | if (ret < 0) { |
130 | dev_err(x->dev, "request_firmware failed\n"); |
131 | return ret; |
132 | } |
133 | |
134 | head = (struct fw_header *)fw->data; |
135 | if (head->magic != 0x4e657458) { |
136 | if (head->magic == 0x5874654e) { |
137 | dev_err(x->dev, |
138 | "firmware magic is 'XteN'. Endianess problems?\n"); |
139 | ret = -ENODEV; |
140 | goto exit_release_firmware; |
141 | } |
142 | dev_err(x->dev, "unrecognized firmware magic 0x%08x\n", |
143 | head->magic); |
144 | ret = -ENODEV; |
145 | goto exit_release_firmware; |
146 | } |
147 | |
148 | x->type = head->type; |
149 | x->version = head->version; |
150 | |
151 | ret = -EINVAL; |
152 | |
153 | for (i = 0; i < 3; i++) { |
154 | src = fw->data + head->fw_desc[i].ofs; |
155 | dst = *(unsigned int *)src; |
156 | src += sizeof (unsigned int); |
157 | size = head->fw_desc[i].size - sizeof (unsigned int); |
158 | |
159 | if (xc_check_ptr(x, dst, size)) |
160 | goto exit_release_firmware; |
161 | |
162 | memcpy((void *)io_p2v(dst), src, size); |
163 | |
164 | src = fw->data + head->fw_desc[i].patch_ofs; |
165 | size = head->fw_desc[i].patch_entries; |
166 | ret = xc_patch(x, src, size); |
167 | if (ret < 0) |
168 | goto exit_release_firmware; |
169 | } |
170 | |
171 | ret = 0; |
172 | |
173 | exit_release_firmware: |
174 | release_firmware(fw); |
175 | |
176 | return ret; |
177 | } |
178 | |
179 | struct xc *request_xc(int xcno, struct device *dev) |
180 | { |
181 | struct xc *x = NULL; |
182 | |
183 | mutex_lock(&xc_lock); |
184 | |
185 | if (xcno > 3) |
186 | goto exit; |
187 | if (xc_in_use & (1 << xcno)) |
188 | goto exit; |
189 | |
190 | x = kmalloc(sizeof (struct xc), GFP_KERNEL); |
191 | if (!x) |
192 | goto exit; |
193 | |
194 | if (!request_mem_region |
195 | (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj))) |
196 | goto exit_free; |
197 | |
198 | if (!request_mem_region |
199 | (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj))) |
200 | goto exit_release_1; |
201 | |
202 | if (!request_mem_region |
203 | (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj))) |
204 | goto exit_release_2; |
205 | |
206 | x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno)); |
207 | x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno)); |
208 | x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); |
209 | if (!x->sram_base) |
210 | goto exit_release_3; |
211 | |
212 | x->irq = NETX_IRQ_XPEC(xcno); |
213 | |
214 | x->no = xcno; |
215 | x->dev = dev; |
216 | |
217 | xc_in_use |= (1 << xcno); |
218 | |
219 | goto exit; |
220 | |
221 | exit_release_3: |
222 | release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); |
223 | exit_release_2: |
224 | release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); |
225 | exit_release_1: |
226 | release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); |
227 | exit_free: |
228 | kfree(x); |
229 | x = NULL; |
230 | exit: |
231 | mutex_unlock(&xc_lock); |
232 | return x; |
233 | } |
234 | |
235 | void free_xc(struct xc *x) |
236 | { |
237 | int xcno = x->no; |
238 | |
239 | mutex_lock(&xc_lock); |
240 | |
241 | iounmap(x->sram_base); |
242 | release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); |
243 | release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); |
244 | release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); |
245 | xc_in_use &= ~(1 << x->no); |
246 | kfree(x); |
247 | |
248 | mutex_unlock(&xc_lock); |
249 | } |
250 | |
251 | EXPORT_SYMBOL(free_xc); |
252 | EXPORT_SYMBOL(request_xc); |
253 | EXPORT_SYMBOL(xc_request_firmware); |
254 | EXPORT_SYMBOL(xc_reset); |
255 | EXPORT_SYMBOL(xc_running); |
256 | EXPORT_SYMBOL(xc_start); |
257 | EXPORT_SYMBOL(xc_stop); |
258 |
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