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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
33static DEFINE_MUTEX(xc_lock);
34
35static int xc_in_use = 0;
36
37struct fw_desc {
38 unsigned int ofs;
39 unsigned int size;
40 unsigned int patch_ofs;
41 unsigned int patch_entries;
42};
43
44struct 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
52int 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
60int 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
68int 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
76int xc_reset(struct xc *x)
77{
78 writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
79 return 0;
80}
81
82static 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
97static 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
114int 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
179struct 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
235void 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
251EXPORT_SYMBOL(free_xc);
252EXPORT_SYMBOL(request_xc);
253EXPORT_SYMBOL(xc_request_firmware);
254EXPORT_SYMBOL(xc_reset);
255EXPORT_SYMBOL(xc_running);
256EXPORT_SYMBOL(xc_start);
257EXPORT_SYMBOL(xc_stop);
258
