| /* |
| * arch/arm/mach-netx/xc.c |
| * |
| * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/firmware.h> |
| #include <linux/mutex.h> |
| |
| #include <asm/io.h> |
| #include <mach/hardware.h> |
| #include <mach/netx-regs.h> |
| |
| #include <mach/xc.h> |
| |
| static DEFINE_MUTEX(xc_lock); |
| |
| static int xc_in_use = 0; |
| |
| struct fw_desc { |
| unsigned int ofs; |
| unsigned int size; |
| unsigned int patch_ofs; |
| unsigned int patch_entries; |
| }; |
| |
| struct fw_header { |
| unsigned int magic; |
| unsigned int type; |
| unsigned int version; |
| unsigned int reserved[5]; |
| struct fw_desc fw_desc[3]; |
| } __attribute__ ((packed)); |
| |
| int xc_stop(struct xc *x) |
| { |
| writel(RPU_HOLD_PC, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); |
| writel(TPU_HOLD_PC, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); |
| writel(XPU_HOLD_PC, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); |
| return 0; |
| } |
| |
| int xc_start(struct xc *x) |
| { |
| writel(0, x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS); |
| writel(0, x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS); |
| writel(0, x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS); |
| return 0; |
| } |
| |
| int xc_running(struct xc *x) |
| { |
| return (readl(x->xmac_base + NETX_XMAC_RPU_HOLD_PC_OFS) & RPU_HOLD_PC) |
| || (readl(x->xmac_base + NETX_XMAC_TPU_HOLD_PC_OFS) & TPU_HOLD_PC) |
| || (readl(x->xpec_base + NETX_XPEC_XPU_HOLD_PC_OFS) & XPU_HOLD_PC) ? |
| 0 : 1; |
| } |
| |
| int xc_reset(struct xc *x) |
| { |
| writel(0, x->xpec_base + NETX_XPEC_PC_OFS); |
| return 0; |
| } |
| |
| static int xc_check_ptr(struct xc *x, unsigned long adr, unsigned int size) |
| { |
| if (adr >= NETX_PA_XMAC(x->no) && |
| adr + size < NETX_PA_XMAC(x->no) + XMAC_MEM_SIZE) |
| return 0; |
| |
| if (adr >= NETX_PA_XPEC(x->no) && |
| adr + size < NETX_PA_XPEC(x->no) + XPEC_MEM_SIZE) |
| return 0; |
| |
| dev_err(x->dev, "Illegal pointer in firmware found. aborting\n"); |
| |
| return -1; |
| } |
| |
| static int xc_patch(struct xc *x, void *patch, int count) |
| { |
| unsigned int val, adr; |
| unsigned int *data = patch; |
| |
| int i; |
| for (i = 0; i < count; i++) { |
| adr = *data++; |
| val = *data++; |
| if (xc_check_ptr(x, adr, 4) < 0) |
| return -EINVAL; |
| |
| writel(val, (void __iomem *)io_p2v(adr)); |
| } |
| return 0; |
| } |
| |
| int xc_request_firmware(struct xc *x) |
| { |
| int ret; |
| char name[16]; |
| const struct firmware *fw; |
| struct fw_header *head; |
| unsigned int size; |
| int i; |
| void *src; |
| unsigned long dst; |
| |
| sprintf(name, "xc%d.bin", x->no); |
| |
| ret = request_firmware(&fw, name, x->dev); |
| |
| if (ret < 0) { |
| dev_err(x->dev, "request_firmware failed\n"); |
| return ret; |
| } |
| |
| head = (struct fw_header *)fw->data; |
| if (head->magic != 0x4e657458) { |
| if (head->magic == 0x5874654e) { |
| dev_err(x->dev, |
| "firmware magic is 'XteN'. Endianess problems?\n"); |
| ret = -ENODEV; |
| goto exit_release_firmware; |
| } |
| dev_err(x->dev, "unrecognized firmware magic 0x%08x\n", |
| head->magic); |
| ret = -ENODEV; |
| goto exit_release_firmware; |
| } |
| |
| x->type = head->type; |
| x->version = head->version; |
| |
| ret = -EINVAL; |
| |
| for (i = 0; i < 3; i++) { |
| src = fw->data + head->fw_desc[i].ofs; |
| dst = *(unsigned int *)src; |
| src += sizeof (unsigned int); |
| size = head->fw_desc[i].size - sizeof (unsigned int); |
| |
| if (xc_check_ptr(x, dst, size)) |
| goto exit_release_firmware; |
| |
| memcpy((void *)io_p2v(dst), src, size); |
| |
| src = fw->data + head->fw_desc[i].patch_ofs; |
| size = head->fw_desc[i].patch_entries; |
| ret = xc_patch(x, src, size); |
| if (ret < 0) |
| goto exit_release_firmware; |
| } |
| |
| ret = 0; |
| |
| exit_release_firmware: |
| release_firmware(fw); |
| |
| return ret; |
| } |
| |
| struct xc *request_xc(int xcno, struct device *dev) |
| { |
| struct xc *x = NULL; |
| |
| mutex_lock(&xc_lock); |
| |
| if (xcno > 3) |
| goto exit; |
| if (xc_in_use & (1 << xcno)) |
| goto exit; |
| |
| x = kmalloc(sizeof (struct xc), GFP_KERNEL); |
| if (!x) |
| goto exit; |
| |
| if (!request_mem_region |
| (NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj))) |
| goto exit_free; |
| |
| if (!request_mem_region |
| (NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj))) |
| goto exit_release_1; |
| |
| if (!request_mem_region |
| (SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj))) |
| goto exit_release_2; |
| |
| x->xpec_base = (void * __iomem)io_p2v(NETX_PA_XPEC(xcno)); |
| x->xmac_base = (void * __iomem)io_p2v(NETX_PA_XMAC(xcno)); |
| x->sram_base = ioremap(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); |
| if (!x->sram_base) |
| goto exit_release_3; |
| |
| x->irq = NETX_IRQ_XPEC(xcno); |
| |
| x->no = xcno; |
| x->dev = dev; |
| |
| xc_in_use |= (1 << xcno); |
| |
| goto exit; |
| |
| exit_release_3: |
| release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); |
| exit_release_2: |
| release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); |
| exit_release_1: |
| release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); |
| exit_free: |
| kfree(x); |
| x = NULL; |
| exit: |
| mutex_unlock(&xc_lock); |
| return x; |
| } |
| |
| void free_xc(struct xc *x) |
| { |
| int xcno = x->no; |
| |
| mutex_lock(&xc_lock); |
| |
| iounmap(x->sram_base); |
| release_mem_region(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE); |
| release_mem_region(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE); |
| release_mem_region(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE); |
| xc_in_use &= ~(1 << x->no); |
| kfree(x); |
| |
| mutex_unlock(&xc_lock); |
| } |
| |
| EXPORT_SYMBOL(free_xc); |
| EXPORT_SYMBOL(request_xc); |
| EXPORT_SYMBOL(xc_request_firmware); |
| EXPORT_SYMBOL(xc_reset); |
| EXPORT_SYMBOL(xc_running); |
| EXPORT_SYMBOL(xc_start); |
| EXPORT_SYMBOL(xc_stop); |