[deliverable/linux.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 <linux/davinci_emac.h>

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

#include <mach/common.h>
#include <mach/cputype.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 int __init davinci_init_id(struct davinci_soc_info *soc_info)
{
	int			i;
	struct davinci_id	*dip;
	u8			variant;
	u16			part_no;
	void __iomem		*base;

	base = ioremap(soc_info->jtag_id_reg, SZ_4K);
	if (!base) {
		pr_err("Unable to map JTAG ID register\n");
		return -ENOMEM;
	}

	soc_info->jtag_id = __raw_readl(base);
	iounmap(base);

	variant = (soc_info->jtag_id & 0xf0000000) >> 28;
	part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;

	for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
			i++, dip++)
		/* Don't care about the manufacturer right now */
		if ((dip->part_no == part_no) && (dip->variant == variant)) {
			soc_info->cpu_id = dip->cpu_id;
			pr_info("DaVinci %s variant 0x%x\n", dip->name,
					dip->variant);
			return 0;
		}

	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
	return -EINVAL;
}

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

	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();

	if (!davinci_soc_info.reset)
		davinci_soc_info.reset = davinci_watchdog_reset;

	/*
	 * We want to check CPU revision early for cpu_is_xxxx() macros.
	 * IO space mapping must be initialized before we can do that.
	 */
	ret = davinci_init_id(&davinci_soc_info);
	if (ret < 0)
		goto err;

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

		if (ret != 0)
			goto err;
	}

	return;

err:
	panic("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>
8ee2bf9a	14	#include <linux/davinci_emac.h>
79c3c0b7 MG	15
	16	#include <asm/tlb.h>
	17	#include <asm/mach/map.h>
	18
	19	#include <mach/common.h>
b9ab1279	20	#include <mach/cputype.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
3347db83	40	static int __init davinci_init_id(struct davinci_soc_info *soc_info)
b9ab1279	41	{
3347db83 CC	42	int i;
	43	struct davinci_id *dip;
	44	u8 variant;
	45	u16 part_no;
	46	void __iomem *base;
	47
	48	base = ioremap(soc_info->jtag_id_reg, SZ_4K);
	49	if (!base) {
	50	pr_err("Unable to map JTAG ID register\n");
	51	return -ENOMEM;
	52	}
	53
	54	soc_info->jtag_id = __raw_readl(base);
	55	iounmap(base);
b9ab1279	56
3347db83 CC	57	variant = (soc_info->jtag_id & 0xf0000000) >> 28;
	58	part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
	59
	60	for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
b9ab1279 MG	61	i++, dip++)
b9ab1279 MG	62	/* Don't care about the manufacturer right now */
3347db83 CC	63	if ((dip->part_no == part_no) && (dip->variant == variant)) {
	64	soc_info->cpu_id = dip->cpu_id;
	65	pr_info("DaVinci %s variant 0x%x\n", dip->name,
	66	dip->variant);
	67	return 0;
	68	}
	69
	70	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
	71	return -EINVAL;
b9ab1279 MG	72	}
b9ab1279 MG	73
79c3c0b7 MG	74	void __init davinci_common_init(struct davinci_soc_info *soc_info)
	75	{
	76	int ret;
	77
	78	if (!soc_info) {
	79	ret = -EINVAL;
	80	goto err;
	81	}
	82
	83	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
	84
	85	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
	86	iotable_init(davinci_soc_info.io_desc,
	87	davinci_soc_info.io_desc_num);
	88
	89	/*
	90	* Normally devicemaps_init() would flush caches and tlb after
	91	* mdesc->map_io(), but we must also do it here because of the CPU
	92	* revision check below.
	93	*/
	94	local_flush_tlb_all();
	95	flush_cache_all();
	96
c78a5bc2 CC	97	if (!davinci_soc_info.reset)
	98	davinci_soc_info.reset = davinci_watchdog_reset;
	99
79c3c0b7 MG	100	/*
	101	* We want to check CPU revision early for cpu_is_xxxx() macros.
	102	* IO space mapping must be initialized before we can do that.
	103	*/
3347db83 CC	104	ret = davinci_init_id(&davinci_soc_info);
3347db83 CC	105	if (ret < 0)
b9ab1279	106	goto err;
79c3c0b7	107
66e0c399 MG	108	if (davinci_soc_info.cpu_clks) {
	109	ret = davinci_clk_init(davinci_soc_info.cpu_clks);
	110
	111	if (ret != 0)
	112	goto err;
	113	}
	114
79c3c0b7 MG	115	return;
	116
	117	err:
69872e93	118	panic("davinci_common_init: SoC Initialization failed\n");
79c3c0b7	119	}