[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 <linux/davinci_emac.h>
#include <linux/dma-mapping.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 nvmem_device *nvmem, void *context)
{
	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
	off_t offset = (off_t)context;

	/* Read MAC addr from EEPROM */
	if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == 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();

	/*
	 * 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");
}

void __init davinci_init_late(void)
{
	davinci_cpufreq_init();
	davinci_pm_init();
	davinci_clk_disable_unused();
}
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>
fd24f903	15	#include <linux/dma-mapping.h>
79c3c0b7 MG	16
	17	#include <asm/tlb.h>
	18	#include <asm/mach/map.h>
	19
	20	#include <mach/common.h>
b9ab1279	21	#include <mach/cputype.h>
79c3c0b7	22
66e0c399 MG	23	#include "clock.h"
66e0c399 MG	24
79c3c0b7 MG	25	struct davinci_soc_info davinci_soc_info;
	26	EXPORT_SYMBOL(davinci_soc_info);
	27
673dd36f	28	void __iomem *davinci_intc_base;
0b0c4c2a	29	int davinci_intc_type;
673dd36f	30
bec3c11b	31	void davinci_get_mac_addr(struct nvmem_device nvmem, void context)
b14dc0f9 MG	32	{
	33	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
	34	off_t offset = (off_t)context;
	35
	36	/* Read MAC addr from EEPROM */
bec3c11b	37	if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN)
b14dc0f9 MG	38	pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
	39	}
	40
3347db83	41	static int __init davinci_init_id(struct davinci_soc_info *soc_info)
b9ab1279	42	{
3347db83 CC	43	int i;
	44	struct davinci_id *dip;
	45	u8 variant;
	46	u16 part_no;
	47	void __iomem *base;
	48
	49	base = ioremap(soc_info->jtag_id_reg, SZ_4K);
	50	if (!base) {
	51	pr_err("Unable to map JTAG ID register\n");
	52	return -ENOMEM;
	53	}
	54
	55	soc_info->jtag_id = __raw_readl(base);
	56	iounmap(base);
b9ab1279	57
3347db83 CC	58	variant = (soc_info->jtag_id & 0xf0000000) >> 28;
	59	part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
	60
	61	for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
b9ab1279 MG	62	i++, dip++)
b9ab1279 MG	63	/* Don't care about the manufacturer right now */
3347db83 CC	64	if ((dip->part_no == part_no) && (dip->variant == variant)) {
	65	soc_info->cpu_id = dip->cpu_id;
	66	pr_info("DaVinci %s variant 0x%x\n", dip->name,
	67	dip->variant);
	68	return 0;
	69	}
	70
	71	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
	72	return -EINVAL;
b9ab1279 MG	73	}
b9ab1279 MG	74
79c3c0b7 MG	75	void __init davinci_common_init(struct davinci_soc_info *soc_info)
	76	{
	77	int ret;
	78
	79	if (!soc_info) {
	80	ret = -EINVAL;
	81	goto err;
	82	}
	83
	84	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
	85
	86	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
	87	iotable_init(davinci_soc_info.io_desc,
	88	davinci_soc_info.io_desc_num);
	89
	90	/*
	91	* Normally devicemaps_init() would flush caches and tlb after
	92	* mdesc->map_io(), but we must also do it here because of the CPU
	93	* revision check below.
	94	*/
	95	local_flush_tlb_all();
	96	flush_cache_all();
	97
	98	/*
	99	* We want to check CPU revision early for cpu_is_xxxx() macros.
	100	* IO space mapping must be initialized before we can do that.
	101	*/
3347db83 CC	102	ret = davinci_init_id(&davinci_soc_info);
3347db83 CC	103	if (ret < 0)
b9ab1279	104	goto err;
79c3c0b7	105
66e0c399 MG	106	if (davinci_soc_info.cpu_clks) {
	107	ret = davinci_clk_init(davinci_soc_info.cpu_clks);
	108
	109	if (ret != 0)
	110	goto err;
	111	}
	112
79c3c0b7 MG	113	return;
	114
	115	err:
69872e93	116	panic("davinci_common_init: SoC Initialization failed\n");
79c3c0b7	117	}
3aa3e840 SG	118
	119	void __init davinci_init_late(void)
	120	{
	121	davinci_cpufreq_init();
	122	davinci_pm_init();
	123	davinci_clk_disable_unused();
	124	}