2 * arch/arm/mach-netx/xc.c
4 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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.
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.
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
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>
27 #include <mach/hardware.h>
28 #include <mach/irqs.h>
29 #include <mach/netx-regs.h>
33 static DEFINE_MUTEX(xc_lock);
35 static int xc_in_use = 0;
40 unsigned int patch_ofs;
41 unsigned int patch_entries;
48 unsigned int reserved[5];
49 struct fw_desc fw_desc[3];
50 } __attribute__ ((packed));
52 int xc_stop(struct xc *x)
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);
60 int xc_start(struct xc *x)
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);
68 int xc_running(struct xc *x)
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) ?
76 int xc_reset(struct xc *x)
78 writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
82 static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size)
84 if (adr >= NETX_PA_XMAC(x->no) &&
85 adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE)
88 if (adr >= NETX_PA_XPEC(x->no) &&
89 adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE)
92 dev_err(x->dev, "Illegal pointer in firmware found. aborting\n");
97 static int xc_patch(struct xc *x, const void *patch, int count)
99 unsigned int val, adr;
100 const unsigned int *data = patch;
103 for (i = 0; i < count; i++) {
106 if (xc_check_ptr(x, adr, 4) < 0)
109 writel(val, (void __iomem *)io_p2v(adr));
114 int xc_request_firmware(struct xc *x)
118 const struct firmware *fw;
119 struct fw_header *head;
125 sprintf(name, "xc%d.bin", x->no);
127 ret = request_firmware(&fw, name, x->dev);
130 dev_err(x->dev, "request_firmware failed\n");
134 head = (struct fw_header *)fw->data;
135 if (head->magic != 0x4e657458) {
136 if (head->magic == 0x5874654e) {
138 "firmware magic is 'XteN'. Endianess problems?\n");
140 goto exit_release_firmware;
142 dev_err(x->dev, "unrecognized firmware magic 0x%08x\n",
145 goto exit_release_firmware;
148 x->type = head->type;
149 x->version = head->version;
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);
159 if (xc_check_ptr(x, dst, size))
160 goto exit_release_firmware;
162 memcpy((void *)io_p2v(dst), src, size);
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);
168 goto exit_release_firmware;
173 exit_release_firmware:
174 release_firmware(fw);
179 struct xc *request_xc(int xcno, struct device *dev)
183 mutex_lock(&xc_lock);
187 if (xc_in_use & (1 << xcno))
190 x = kmalloc(sizeof (struct xc), GFP_KERNEL);
194 if (!request_mem_region
195 (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj)))
198 if (!request_mem_region
199 (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj)))
202 if (!request_mem_region
203 (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj)))
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);
212 x->irq = NETX_IRQ_XPEC(xcno);
217 xc_in_use |= (1 << xcno);
222 release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
224 release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
226 release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
231 mutex_unlock(&xc_lock);
235 void free_xc(struct xc *x)
239 mutex_lock(&xc_lock);
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);
248 mutex_unlock(&xc_lock);
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);