1 // SPDX-License-Identifier: GPL-2.0-only
3 * arch/arm/mach-netx/xc.c
5 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
8 #include <linux/init.h>
9 #include <linux/device.h>
10 #include <linux/firmware.h>
11 #include <linux/mutex.h>
12 #include <linux/slab.h>
14 #include <linux/export.h>
16 #include <mach/hardware.h>
17 #include <mach/irqs.h>
18 #include <mach/netx-regs.h>
22 static DEFINE_MUTEX(xc_lock);
24 static int xc_in_use = 0;
29 unsigned int patch_ofs;
30 unsigned int patch_entries;
37 unsigned int reserved[5];
38 struct fw_desc fw_desc[3];
39 } __attribute__ ((packed));
41 int xc_stop(struct xc *x)
43 writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS);
44 writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS);
45 writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS);
49 int xc_start(struct xc *x)
51 writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS);
52 writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS);
53 writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS);
57 int xc_running(struct xc *x)
59 return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC)
60 || (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC)
61 || (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ?
65 int xc_reset(struct xc *x)
67 writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
71 static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size)
73 if (adr >= NETX_PA_XMAC(x->no) &&
74 adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE)
77 if (adr >= NETX_PA_XPEC(x->no) &&
78 adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE)
81 dev_err(x->dev, "Illegal pointer in firmware found. aborting\n");
86 static int xc_patch(struct xc *x, const void *patch, int count)
88 unsigned int val, adr;
89 const unsigned int *data = patch;
92 for (i = 0; i < count; i++) {
95 if (xc_check_ptr(x, adr, 4) < 0)
98 writel(val, (void __iomem *)io_p2v(adr));
103 int xc_request_firmware(struct xc *x)
107 const struct firmware *fw;
108 struct fw_header *head;
114 sprintf(name, "xc%d.bin", x->no);
116 ret = request_firmware(&fw, name, x->dev);
119 dev_err(x->dev, "request_firmware failed\n");
123 head = (struct fw_header *)fw->data;
124 if (head->magic != 0x4e657458) {
125 if (head->magic == 0x5874654e) {
127 "firmware magic is 'XteN'. Endianness problems?\n");
129 goto exit_release_firmware;
131 dev_err(x->dev, "unrecognized firmware magic 0x%08x\n",
134 goto exit_release_firmware;
137 x->type = head->type;
138 x->version = head->version;
142 for (i = 0; i < 3; i++) {
143 src = fw->data + head->fw_desc[i].ofs;
144 dst = *(unsigned int *)src;
145 src += sizeof (unsigned int);
146 size = head->fw_desc[i].size - sizeof (unsigned int);
148 if (xc_check_ptr(x, dst, size))
149 goto exit_release_firmware;
151 memcpy((void *)io_p2v(dst), src, size);
153 src = fw->data + head->fw_desc[i].patch_ofs;
154 size = head->fw_desc[i].patch_entries;
155 ret = xc_patch(x, src, size);
157 goto exit_release_firmware;
162 exit_release_firmware:
163 release_firmware(fw);
168 struct xc *request_xc(int xcno, struct device *dev)
172 mutex_lock(&xc_lock);
176 if (xc_in_use & (1 << xcno))
179 x = kmalloc(sizeof (struct xc), GFP_KERNEL);
183 if (!request_mem_region
184 (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj)))
187 if (!request_mem_region
188 (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj)))
191 if (!request_mem_region
192 (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj)))
195 x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno));
196 x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno));
197 x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
201 x->irq = NETX_IRQ_XPEC(xcno);
206 xc_in_use |= (1 << xcno);
211 release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
213 release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
215 release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
220 mutex_unlock(&xc_lock);
224 void free_xc(struct xc *x)
228 mutex_lock(&xc_lock);
230 iounmap(x->sram_base);
231 release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE);
232 release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE);
233 release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE);
234 xc_in_use &= ~(1 << x->no);
237 mutex_unlock(&xc_lock);
240 EXPORT_SYMBOL(free_xc);
241 EXPORT_SYMBOL(request_xc);
242 EXPORT_SYMBOL(xc_request_firmware);
243 EXPORT_SYMBOL(xc_reset);
244 EXPORT_SYMBOL(xc_running);
245 EXPORT_SYMBOL(xc_start);
246 EXPORT_SYMBOL(xc_stop);