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>
26 #include <asm/hardware.h>
27 #include <asm/arch/netx-regs.h>
29 #include <asm/arch/xc.h>
31 static DEFINE_MUTEX(xc_lock);
33 static int xc_in_use = 0;
38 unsigned int patch_ofs;
39 unsigned int patch_entries;
46 unsigned int reserved[5];
47 struct fw_desc fw_desc[3];
48 } __attribute__ ((packed));
50 int xc_stop(struct xc *x)
52 writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS);
53 writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS);
54 writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS);
58 int xc_start(struct xc *x)
60 writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS);
61 writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS);
62 writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS);
66 int xc_running(struct xc *x)
68 return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC)
69 || (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC)
70 || (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ?
74 int xc_reset(struct xc *x)
76 writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
80 static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size)
82 if (adr >= NETX_PA_XMAC(x->no) &&
83 adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE)
86 if (adr >= NETX_PA_XPEC(x->no) &&
87 adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE)
90 dev_err(x->dev, "Illegal pointer in firmware found. aborting\n");
95 static int xc_patch(struct xc *x, void *patch, int count)
97 unsigned int val, adr;
98 unsigned int *data = patch;
101 for (i = 0; i < count; i++) {
104 if (xc_check_ptr(x, adr, 4) < 0)
107 writel(val, (void __iomem *)io_p2v(adr));
112 int xc_request_firmware(struct xc *x)
116 const struct firmware *fw;
117 struct fw_header *head;
123 sprintf(name, "xc%d.bin", x->no);
125 ret = request_firmware(&fw, name, x->dev);
128 dev_err(x->dev, "request_firmware failed\n");
132 head = (struct fw_header *)fw->data;
133 if (head->magic != 0x4e657458) {
134 if (head->magic == 0x5874654e) {
136 "firmware magic is 'XteN'. Endianess problems?\n");
138 goto exit_release_firmware;
140 dev_err(x->dev, "unrecognized firmware magic 0x%08x\n",
143 goto exit_release_firmware;
146 x->type = head->type;
147 x->version = head->version;
151 for (i = 0; i < 3; i++) {
152 src = fw->data + head->fw_desc[i].ofs;
153 dst = *(unsigned int *)src;
154 src += sizeof (unsigned int);
155 size = head->fw_desc[i].size - sizeof (unsigned int);
157 if (xc_check_ptr(x, dst, size))
158 goto exit_release_firmware;
160 memcpy((void *)io_p2v(dst), src, size);
162 src = fw->data + head->fw_desc[i].patch_ofs;
163 size = head->fw_desc[i].patch_entries;
164 ret = xc_patch(x, src, size);
166 goto exit_release_firmware;
171 exit_release_firmware:
172 release_firmware(fw);
177 struct xc *request_xc(int xcno, struct device *dev)
181 mutex_lock(&xc_lock);
185 if (xc_in_use & (1 << xcno))
188 x = kmalloc(sizeof (struct xc), GFP_KERNEL);
192 if (!request_mem_region
193 (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj)))
196 if (!request_mem_region
197 (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj)))
200 if (!request_mem_region
201 (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj)))
204 x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno));
205 x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno));
206 x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
210 x->irq = NETX_IRQ_XPEC(xcno);
215 xc_in_use |= (1 << xcno);
220 release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
222 release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
224 release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
229 mutex_unlock(&xc_lock);
233 void free_xc(struct xc *x)
237 mutex_lock(&xc_lock);
239 iounmap(x->sram_base);
240 release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
241 release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
242 release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
243 xc_in_use &= ~(1 << x->no);
246 mutex_unlock(&xc_lock);
249 EXPORT_SYMBOL(free_xc);
250 EXPORT_SYMBOL(request_xc);
251 EXPORT_SYMBOL(xc_request_firmware);
252 EXPORT_SYMBOL(xc_reset);
253 EXPORT_SYMBOL(xc_running);
254 EXPORT_SYMBOL(xc_start);
255 EXPORT_SYMBOL(xc_stop);