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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> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
fced80c7 | 25 | #include <linux/io.h> |
dc28094b | 26 | #include <linux/export.h> |
8e77da68 | 27 | |
a09e64fb | 28 | #include <mach/hardware.h> |
80b02c17 | 29 | #include <mach/irqs.h> |
a09e64fb | 30 | #include <mach/netx-regs.h> |
8e77da68 | 31 | |
a09e64fb | 32 | #include <mach/xc.h> |
8e77da68 SH |
33 | |
34 | static DEFINE_MUTEX(xc_lock); | |
35 | ||
36 | static int xc_in_use = 0; | |
37 | ||
38 | struct fw_desc { | |
39 | unsigned int ofs; | |
40 | unsigned int size; | |
41 | unsigned int patch_ofs; | |
42 | unsigned int patch_entries; | |
43 | }; | |
44 | ||
45 | struct fw_header { | |
46 | unsigned int magic; | |
47 | unsigned int type; | |
48 | unsigned int version; | |
49 | unsigned int reserved[5]; | |
50 | struct fw_desc fw_desc[3]; | |
51 | } __attribute__ ((packed)); | |
52 | ||
53 | int xc_stop(struct xc *x) | |
54 | { | |
55 | writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); | |
56 | writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); | |
57 | writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); | |
58 | return 0; | |
59 | } | |
60 | ||
61 | int xc_start(struct xc *x) | |
62 | { | |
63 | writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); | |
64 | writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); | |
65 | writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | int xc_running(struct xc *x) | |
70 | { | |
71 | return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC) | |
72 | || (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC) | |
73 | || (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ? | |
74 | 0 : 1; | |
75 | } | |
76 | ||
77 | int xc_reset(struct xc *x) | |
78 | { | |
79 | writel(0, x->xpec_base + NETX_XPEC_PC_OFS); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size) | |
84 | { | |
85 | if (adr >= NETX_PA_XMAC(x->no) && | |
86 | adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE) | |
87 | return 0; | |
88 | ||
89 | if (adr >= NETX_PA_XPEC(x->no) && | |
90 | adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE) | |
91 | return 0; | |
92 | ||
93 | dev_err(x->dev, "Illegal pointer in firmware found. aborting\n"); | |
94 | ||
95 | return -1; | |
96 | } | |
97 | ||
e0a84ebd | 98 | static int xc_patch(struct xc *x, const void *patch, int count) |
8e77da68 SH |
99 | { |
100 | unsigned int val, adr; | |
e0a84ebd | 101 | const unsigned int *data = patch; |
8e77da68 SH |
102 | |
103 | int i; | |
104 | for (i = 0; i < count; i++) { | |
105 | adr = *data++; | |
106 | val = *data++; | |
107 | if (xc_check_ptr(x, adr, 4) < 0) | |
108 | return -EINVAL; | |
109 | ||
110 | writel(val, (void __iomem *)io_p2v(adr)); | |
111 | } | |
112 | return 0; | |
113 | } | |
114 | ||
115 | int xc_request_firmware(struct xc *x) | |
116 | { | |
117 | int ret; | |
118 | char name[16]; | |
119 | const struct firmware *fw; | |
120 | struct fw_header *head; | |
121 | unsigned int size; | |
122 | int i; | |
e0a84ebd | 123 | const void *src; |
8e77da68 SH |
124 | unsigned long dst; |
125 | ||
126 | sprintf(name, "xc%d.bin", x->no); | |
127 | ||
128 | ret = request_firmware(&fw, name, x->dev); | |
129 | ||
130 | if (ret < 0) { | |
131 | dev_err(x->dev, "request_firmware failed\n"); | |
132 | return ret; | |
133 | } | |
134 | ||
135 | head = (struct fw_header *)fw->data; | |
136 | if (head->magic != 0x4e657458) { | |
137 | if (head->magic == 0x5874654e) { | |
138 | dev_err(x->dev, | |
9c768207 | 139 | "firmware magic is 'XteN'. Endianness problems?\n"); |
8e77da68 SH |
140 | ret = -ENODEV; |
141 | goto exit_release_firmware; | |
142 | } | |
143 | dev_err(x->dev, "unrecognized firmware magic 0x%08x\n", | |
144 | head->magic); | |
145 | ret = -ENODEV; | |
146 | goto exit_release_firmware; | |
147 | } | |
148 | ||
149 | x->type = head->type; | |
150 | x->version = head->version; | |
151 | ||
152 | ret = -EINVAL; | |
153 | ||
154 | for (i = 0; i < 3; i++) { | |
155 | src = fw->data + head->fw_desc[i].ofs; | |
156 | dst = *(unsigned int *)src; | |
157 | src += sizeof (unsigned int); | |
158 | size = head->fw_desc[i].size - sizeof (unsigned int); | |
159 | ||
160 | if (xc_check_ptr(x, dst, size)) | |
161 | goto exit_release_firmware; | |
162 | ||
163 | memcpy((void *)io_p2v(dst), src, size); | |
164 | ||
165 | src = fw->data + head->fw_desc[i].patch_ofs; | |
166 | size = head->fw_desc[i].patch_entries; | |
167 | ret = xc_patch(x, src, size); | |
168 | if (ret < 0) | |
169 | goto exit_release_firmware; | |
170 | } | |
171 | ||
172 | ret = 0; | |
173 | ||
174 | exit_release_firmware: | |
175 | release_firmware(fw); | |
176 | ||
177 | return ret; | |
178 | } | |
179 | ||
180 | struct xc *request_xc(int xcno, struct device *dev) | |
181 | { | |
182 | struct xc *x = NULL; | |
183 | ||
184 | mutex_lock(&xc_lock); | |
185 | ||
186 | if (xcno > 3) | |
187 | goto exit; | |
188 | if (xc_in_use & (1 << xcno)) | |
189 | goto exit; | |
190 | ||
191 | x = kmalloc(sizeof (struct xc), GFP_KERNEL); | |
192 | if (!x) | |
193 | goto exit; | |
194 | ||
195 | if (!request_mem_region | |
93e29a2e | 196 | (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj))) |
8e77da68 SH |
197 | goto exit_free; |
198 | ||
199 | if (!request_mem_region | |
93e29a2e | 200 | (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj))) |
8e77da68 SH |
201 | goto exit_release_1; |
202 | ||
203 | if (!request_mem_region | |
93e29a2e | 204 | (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj))) |
8e77da68 SH |
205 | goto exit_release_2; |
206 | ||
207 | x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno)); | |
208 | x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno)); | |
209 | x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); | |
210 | if (!x->sram_base) | |
211 | goto exit_release_3; | |
212 | ||
213 | x->irq = NETX_IRQ_XPEC(xcno); | |
214 | ||
215 | x->no = xcno; | |
216 | x->dev = dev; | |
217 | ||
218 | xc_in_use |= (1 << xcno); | |
219 | ||
220 | goto exit; | |
221 | ||
222 | exit_release_3: | |
223 | release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); | |
224 | exit_release_2: | |
225 | release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); | |
226 | exit_release_1: | |
227 | release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); | |
228 | exit_free: | |
229 | kfree(x); | |
230 | x = NULL; | |
231 | exit: | |
232 | mutex_unlock(&xc_lock); | |
233 | return x; | |
234 | } | |
235 | ||
236 | void free_xc(struct xc *x) | |
237 | { | |
238 | int xcno = x->no; | |
239 | ||
240 | mutex_lock(&xc_lock); | |
241 | ||
242 | iounmap(x->sram_base); | |
243 | release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); | |
244 | release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); | |
245 | release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); | |
246 | xc_in_use &= ~(1 << x->no); | |
247 | kfree(x); | |
248 | ||
249 | mutex_unlock(&xc_lock); | |
250 | } | |
251 | ||
252 | EXPORT_SYMBOL(free_xc); | |
253 | EXPORT_SYMBOL(request_xc); | |
254 | EXPORT_SYMBOL(xc_request_firmware); | |
255 | EXPORT_SYMBOL(xc_reset); | |
256 | EXPORT_SYMBOL(xc_running); | |
257 | EXPORT_SYMBOL(xc_start); | |
258 | EXPORT_SYMBOL(xc_stop); |