[net-next-2.6.git] / arch / arm / mach-netx / xc.c

/*
 * 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 <linux/slab.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <mach/irqs.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, const void *patch, int count)
{
	unsigned int val, adr;
	const 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;
	const 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);
Commit	Line	Data
8e77da68 SH	1	/*
	2	* arch/arm/mach-netx/xc.c
	3	*
	4	* Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
	5	*
	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.
	9	*
	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.
	14	*
	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
	18	*/
	19
	20	#include <linux/init.h>
	21	#include <linux/device.h>
	22	#include <linux/firmware.h>
	23	#include <linux/mutex.h>
5a0e3ad6	24	#include <linux/slab.h>
fced80c7	25	#include <linux/io.h>
8e77da68	26
a09e64fb	27	#include <mach/hardware.h>
80b02c17	28	#include <mach/irqs.h>
a09e64fb	29	#include <mach/netx-regs.h>
8e77da68	30
a09e64fb	31	#include <mach/xc.h>
8e77da68 SH	32
	33	static DEFINE_MUTEX(xc_lock);
	34
	35	static int xc_in_use = 0;
	36
	37	struct fw_desc {
	38	unsigned int ofs;
	39	unsigned int size;
	40	unsigned int patch_ofs;
	41	unsigned int patch_entries;
	42	};
	43
	44	struct 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
	52	int 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
	60	int 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
	68	int 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
	76	int xc_reset(struct xc *x)
	77	{
	78	writel(0, x->xpec_base + NETX_XPEC_PC_OFS);
	79	return 0;
	80	}
	81
	82	static 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
e0a84ebd	97	static int xc_patch(struct xc x, const void patch, int count)
8e77da68 SH	98	{
8e77da68 SH	99	unsigned int val, adr;
e0a84ebd	100	const unsigned int *data = patch;
8e77da68 SH	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
	114	int 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;
e0a84ebd	122	const void *src;
8e77da68 SH	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
	179	struct 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
93e29a2e	195	(NETX_PA_XPEC(xcno), XPEC_MEM_SIZE, kobject_name(&dev->kobj)))
8e77da68 SH	196	goto exit_free;
	197
	198	if (!request_mem_region
93e29a2e	199	(NETX_PA_XMAC(xcno), XMAC_MEM_SIZE, kobject_name(&dev->kobj)))
8e77da68 SH	200	goto exit_release_1;
	201
	202	if (!request_mem_region
93e29a2e	203	(SRAM_INTERNAL_PHYS(xcno), SRAM_MEM_SIZE, kobject_name(&dev->kobj)))
8e77da68 SH	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
	235	void 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
	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);