1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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#include <linux/export.h>
27
28#include <mach/hardware.h>
29#include <mach/irqs.h>
30#include <mach/netx-regs.h>
31
32#include <mach/xc.h>
33
34static DEFINE_MUTEX(xc_lock);
35
36static int xc_in_use = 0;
37
38struct fw_desc {
39 unsigned int ofs;
40 unsigned int size;
41 unsigned int patch_ofs;
42 unsigned int patch_entries;
43};
44
45struct 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
53int 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
61int 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
69int 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
77int xc_reset(struct xc *x)
78{
79 writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
80 return 0;
81}
82
83static 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
98static int xc_patch(struct xc *x, const void *patch, int count)
99{
100 unsigned int val, adr;
101 const unsigned int *data = patch;
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
115int 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;
123 const void *src;
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,
139 "firmware magic is 'XteN'. Endianness problems?\n");
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
180struct 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
196 (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj)))
197 goto exit_free;
198
199 if (!request_mem_region
200 (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj)))
201 goto exit_release_1;
202
203 if (!request_mem_region
204 (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj)))
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
236void 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
252EXPORT_SYMBOL(free_xc);
253EXPORT_SYMBOL(request_xc);
254EXPORT_SYMBOL(xc_request_firmware);
255EXPORT_SYMBOL(xc_reset);
256EXPORT_SYMBOL(xc_running);
257EXPORT_SYMBOL(xc_start);
258EXPORT_SYMBOL(xc_stop);
259
