[linux-2.6-block.git] / arch / arm / mach-davinci / common.c

/*
 * Code commons to all DaVinci SoCs.
 *
 * Author: Mark A. Greer <mgreer@mvista.com>
 *
 * 2009 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/module.h>
#include <linux/io.h>
#include <linux/etherdevice.h>

#include <asm/tlb.h>
#include <asm/mach/map.h>

#include <mach/common.h>
#include <mach/cputype.h>
#include <mach/emac.h>

#include "clock.h"

struct davinci_soc_info davinci_soc_info;
EXPORT_SYMBOL(davinci_soc_info);

void __iomem *davinci_intc_base;
int davinci_intc_type;

void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context)
{
	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
	off_t offset = (off_t)context;

	/* Read MAC addr from EEPROM */
	if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN)
		pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
}

static struct davinci_id * __init davinci_get_id(u32 jtag_id)
{
	int i;
	struct davinci_id *dip;
	u8 variant = (jtag_id & 0xf0000000) >> 28;
	u16 part_no = (jtag_id & 0x0ffff000) >> 12;

	for (i = 0, dip = davinci_soc_info.ids; i < davinci_soc_info.ids_num;
			i++, dip++)
		/* Don't care about the manufacturer right now */
		if ((dip->part_no == part_no) && (dip->variant == variant))
			return dip;

	return NULL;
}

void __init davinci_common_init(struct davinci_soc_info *soc_info)
{
	int ret;
	struct davinci_id *dip;

	if (!soc_info) {
		ret = -EINVAL;
		goto err;
	}

	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));

	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
		iotable_init(davinci_soc_info.io_desc,
				davinci_soc_info.io_desc_num);

	/*
	 * Normally devicemaps_init() would flush caches and tlb after
	 * mdesc->map_io(), but we must also do it here because of the CPU
	 * revision check below.
	 */
	local_flush_tlb_all();
	flush_cache_all();

	/*
	 * We want to check CPU revision early for cpu_is_xxxx() macros.
	 * IO space mapping must be initialized before we can do that.
	 */
	davinci_soc_info.jtag_id = __raw_readl(davinci_soc_info.jtag_id_base);

	dip = davinci_get_id(davinci_soc_info.jtag_id);
	if (!dip) {
		ret = -EINVAL;
		goto err;
	}

	davinci_soc_info.cpu_id = dip->cpu_id;
	pr_info("DaVinci %s variant 0x%x\n", dip->name, dip->variant);

	if (davinci_soc_info.cpu_clks) {
		ret = davinci_clk_init(davinci_soc_info.cpu_clks);

		if (ret != 0)
			goto err;
	}

	davinci_intc_base = davinci_soc_info.intc_base;
	davinci_intc_type = davinci_soc_info.intc_type;
	return;

err:
	pr_err("davinci_common_init: SoC Initialization failed\n");
}
Commit	Line	Data
79c3c0b7 MG	1	/*
	2	* Code commons to all DaVinci SoCs.
	3	*
	4	* Author: Mark A. Greer <mgreer@mvista.com>
	5	*
	6	* 2009 (c) MontaVista Software, Inc. This file is licensed under
	7	* the terms of the GNU General Public License version 2. This program
	8	* is licensed "as is" without any warranty of any kind, whether express
	9	* or implied.
	10	*/
	11	#include <linux/module.h>
	12	#include <linux/io.h>
b14dc0f9	13	#include <linux/etherdevice.h>
79c3c0b7 MG	14
	15	#include <asm/tlb.h>
	16	#include <asm/mach/map.h>
	17
	18	#include <mach/common.h>
b9ab1279	19	#include <mach/cputype.h>
b14dc0f9	20	#include <mach/emac.h>
79c3c0b7	21
66e0c399 MG	22	#include "clock.h"
66e0c399 MG	23
79c3c0b7 MG	24	struct davinci_soc_info davinci_soc_info;
	25	EXPORT_SYMBOL(davinci_soc_info);
	26
673dd36f	27	void __iomem *davinci_intc_base;
0b0c4c2a	28	int davinci_intc_type;
673dd36f	29
b14dc0f9 MG	30	void davinci_get_mac_addr(struct memory_accessor mem_acc, void context)
	31	{
	32	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
	33	off_t offset = (off_t)context;
	34
	35	/* Read MAC addr from EEPROM */
	36	if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN)
	37	pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
	38	}
	39
b9ab1279 MG	40	static struct davinci_id * __init davinci_get_id(u32 jtag_id)
	41	{
	42	int i;
	43	struct davinci_id *dip;
	44	u8 variant = (jtag_id & 0xf0000000) >> 28;
	45	u16 part_no = (jtag_id & 0x0ffff000) >> 12;
	46
	47	for (i = 0, dip = davinci_soc_info.ids; i < davinci_soc_info.ids_num;
	48	i++, dip++)
	49	/* Don't care about the manufacturer right now */
	50	if ((dip->part_no == part_no) && (dip->variant == variant))
	51	return dip;
	52
	53	return NULL;
	54	}
	55
79c3c0b7 MG	56	void __init davinci_common_init(struct davinci_soc_info *soc_info)
	57	{
	58	int ret;
b9ab1279	59	struct davinci_id *dip;
79c3c0b7 MG	60
	61	if (!soc_info) {
	62	ret = -EINVAL;
	63	goto err;
	64	}
	65
	66	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
	67
	68	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
	69	iotable_init(davinci_soc_info.io_desc,
	70	davinci_soc_info.io_desc_num);
	71
	72	/*
	73	* Normally devicemaps_init() would flush caches and tlb after
	74	* mdesc->map_io(), but we must also do it here because of the CPU
	75	* revision check below.
	76	*/
	77	local_flush_tlb_all();
	78	flush_cache_all();
	79
	80	/*
	81	* We want to check CPU revision early for cpu_is_xxxx() macros.
	82	* IO space mapping must be initialized before we can do that.
	83	*/
b9ab1279 MG	84	davinci_soc_info.jtag_id = __raw_readl(davinci_soc_info.jtag_id_base);
	85
	86	dip = davinci_get_id(davinci_soc_info.jtag_id);
	87	if (!dip) {
	88	ret = -EINVAL;
	89	goto err;
	90	}
	91
	92	davinci_soc_info.cpu_id = dip->cpu_id;
	93	pr_info("DaVinci %s variant 0x%x\n", dip->name, dip->variant);
79c3c0b7	94
66e0c399 MG	95	if (davinci_soc_info.cpu_clks) {
	96	ret = davinci_clk_init(davinci_soc_info.cpu_clks);
	97
	98	if (ret != 0)
	99	goto err;
	100	}
	101
673dd36f	102	davinci_intc_base = davinci_soc_info.intc_base;
0b0c4c2a	103	davinci_intc_type = davinci_soc_info.intc_type;
79c3c0b7 MG	104	return;
	105
	106	err:
	107	pr_err("davinci_common_init: SoC Initialization failed\n");
	108	}