pcmciamtd.c

飞思卡尔芯片imx27下的MTD模块的驱动源码

			cistpl_vers_1_t *t = &parse.version_1;
			int i;
			if(t->ns) {
				dev->mtd_name[0] = '\0';
				for(i = 0; i < t->ns; i++) {
					if(i)
						strcat(dev->mtd_name, " ");
					strcat(dev->mtd_name, t->str+t->ofs[i]);
				}
			}
			DEBUG(2, "Found name: %s", dev->mtd_name);
			break;
		}

		case CISTPL_JEDEC_C: {
			cistpl_jedec_t *t = &parse.jedec;
			int i;
			for(i = 0; i < t->nid; i++) {
				DEBUG(2, "JEDEC: 0x%02x 0x%02x", t->id[i].mfr, t->id[i].info);
			}
			break;
		}

		case CISTPL_DEVICE_GEO: {
			cistpl_device_geo_t *t = &parse.device_geo;
			int i;
			dev->pcmcia_map.bankwidth = t->geo[0].buswidth;
			for(i = 0; i < t->ngeo; i++) {
				DEBUG(2, "region: %d bankwidth = %u", i, t->geo[i].buswidth);
				DEBUG(2, "region: %d erase_block = %u", i, t->geo[i].erase_block);
				DEBUG(2, "region: %d read_block = %u", i, t->geo[i].read_block);
				DEBUG(2, "region: %d write_block = %u", i, t->geo[i].write_block);
				DEBUG(2, "region: %d partition = %u", i, t->geo[i].partition);
				DEBUG(2, "region: %d interleave = %u", i, t->geo[i].interleave);
			}
			break;
		}

		default:
			DEBUG(2, "Unknown tuple code %d", tuple.TupleCode);
		}

		rc = pcmcia_get_next_tuple(link, &tuple);
	}
	if(!dev->pcmcia_map.size)
		dev->pcmcia_map.size = MAX_PCMCIA_ADDR;

	if(!dev->pcmcia_map.bankwidth)
		dev->pcmcia_map.bankwidth = 2;

	if(force_size) {
		dev->pcmcia_map.size = force_size << 20;
		DEBUG(2, "size forced to %dM", force_size);
	}

	if(bankwidth) {
		dev->pcmcia_map.bankwidth = bankwidth;
		DEBUG(2, "bankwidth forced to %d", bankwidth);
	}

	dev->pcmcia_map.name = dev->mtd_name;
	if(!dev->mtd_name[0]) {
		strcpy(dev->mtd_name, "PCMCIA Memory card");
		*new_name = 1;
	}

	DEBUG(1, "Device: Size: %lu Width:%d Name: %s",
	      dev->pcmcia_map.size, dev->pcmcia_map.bankwidth << 3, dev->mtd_name);
}


/* pcmciamtd_config() is scheduled to run after a CARD_INSERTION event
 * is received, to configure the PCMCIA socket, and to make the
 * MTD device available to the system.
 */

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static int pcmciamtd_config(struct pcmcia_device *link)
{
	struct pcmciamtd_dev *dev = link->priv;
	struct mtd_info *mtd = NULL;
	cs_status_t status;
	win_req_t req;
	int last_ret = 0, last_fn = 0;
	int ret;
	int i;
	config_info_t t;
	static char *probes[] = { "jedec_probe", "cfi_probe" };
	cisinfo_t cisinfo;
	int new_name = 0;

	DEBUG(3, "link=0x%p", link);

	DEBUG(2, "Validating CIS");
	ret = pcmcia_validate_cis(link, &cisinfo);
	if(ret != CS_SUCCESS) {
		cs_error(link, GetTupleData, ret);
	} else {
		DEBUG(2, "ValidateCIS found %d chains", cisinfo.Chains);
	}

	card_settings(dev, link, &new_name);

	dev->pcmcia_map.phys = NO_XIP;
	dev->pcmcia_map.copy_from = pcmcia_copy_from_remap;
	dev->pcmcia_map.copy_to = pcmcia_copy_to_remap;
	if (dev->pcmcia_map.bankwidth == 1) {
		dev->pcmcia_map.read = pcmcia_read8_remap;
		dev->pcmcia_map.write = pcmcia_write8_remap;
	} else {
		dev->pcmcia_map.read = pcmcia_read16_remap;
		dev->pcmcia_map.write = pcmcia_write16_remap;
	}
	if(setvpp == 1)
		dev->pcmcia_map.set_vpp = pcmciamtd_set_vpp;

	/* Request a memory window for PCMCIA. Some architeures can map windows upto the maximum
	   that PCMCIA can support (64MiB) - this is ideal and we aim for a window the size of the
	   whole card - otherwise we try smaller windows until we succeed */

	req.Attributes =  WIN_MEMORY_TYPE_CM | WIN_ENABLE;
	req.Attributes |= (dev->pcmcia_map.bankwidth == 1) ? WIN_DATA_WIDTH_8 : WIN_DATA_WIDTH_16;
	req.Base = 0;
	req.AccessSpeed = mem_speed;
	link->win = (window_handle_t)link;
	req.Size = (force_size) ? force_size << 20 : MAX_PCMCIA_ADDR;
	dev->win_size = 0;

	do {
		int ret;
		DEBUG(2, "requesting window with size = %dKiB memspeed = %d",
		      req.Size >> 10, req.AccessSpeed);
		ret = pcmcia_request_window(&link, &req, &link->win);
		DEBUG(2, "ret = %d dev->win_size = %d", ret, dev->win_size);
		if(ret) {
			req.Size >>= 1;
		} else {
			DEBUG(2, "Got window of size %dKiB", req.Size >> 10);
			dev->win_size = req.Size;
			break;
		}
	} while(req.Size >= 0x1000);

	DEBUG(2, "dev->win_size = %d", dev->win_size);

	if(!dev->win_size) {
		err("Cant allocate memory window");
		pcmciamtd_release(link);
		return -ENODEV;
	}
	DEBUG(1, "Allocated a window of %dKiB", dev->win_size >> 10);

	/* Get write protect status */
	CS_CHECK(GetStatus, pcmcia_get_status(link, &status));
	DEBUG(2, "status value: 0x%x window handle = 0x%8.8lx",
	      status.CardState, (unsigned long)link->win);
	dev->win_base = ioremap(req.Base, req.Size);
	if(!dev->win_base) {
		err("ioremap(%lu, %u) failed", req.Base, req.Size);
		pcmciamtd_release(link);
		return -ENODEV;
	}
	DEBUG(1, "mapped window dev = %p req.base = 0x%lx base = %p size = 0x%x",
	      dev, req.Base, dev->win_base, req.Size);

	dev->offset = 0;
	dev->pcmcia_map.map_priv_1 = (unsigned long)dev;
	dev->pcmcia_map.map_priv_2 = (unsigned long)link->win;

	DEBUG(2, "Getting configuration");
	CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(link, &t));
	DEBUG(2, "Vcc = %d Vpp1 = %d Vpp2 = %d", t.Vcc, t.Vpp1, t.Vpp2);
	dev->vpp = (vpp) ? vpp : t.Vpp1;
	link->conf.Attributes = 0;
	if(setvpp == 2) {
		link->conf.Vpp = dev->vpp;
	} else {
		link->conf.Vpp = 0;
	}

	link->conf.IntType = INT_MEMORY;
	link->conf.ConfigBase = t.ConfigBase;
	link->conf.Status = t.Status;
	link->conf.Pin = t.Pin;
	link->conf.Copy = t.Copy;
	link->conf.ExtStatus = t.ExtStatus;
	link->conf.ConfigIndex = 0;
	link->conf.Present = t.Present;
	DEBUG(2, "Setting Configuration");
	ret = pcmcia_request_configuration(link, &link->conf);
	if(ret != CS_SUCCESS) {
		cs_error(link, RequestConfiguration, ret);
		if (dev->win_base) {
			iounmap(dev->win_base);
			dev->win_base = NULL;
		}
		return -ENODEV;
	}

	if(mem_type == 1) {
		mtd = do_map_probe("map_ram", &dev->pcmcia_map);
	} else if(mem_type == 2) {
		mtd = do_map_probe("map_rom", &dev->pcmcia_map);
	} else {
		for(i = 0; i < ARRAY_SIZE(probes); i++) {
			DEBUG(1, "Trying %s", probes[i]);
			mtd = do_map_probe(probes[i], &dev->pcmcia_map);
			if(mtd)
				break;

			DEBUG(1, "FAILED: %s", probes[i]);
		}
	}

	if(!mtd) {
		DEBUG(1, "Cant find an MTD");
		pcmciamtd_release(link);
		return -ENODEV;
	}

	dev->mtd_info = mtd;
	mtd->owner = THIS_MODULE;

	if(new_name) {
		int size = 0;
		char unit = ' ';
		/* Since we are using a default name, make it better by adding in the
		   size */
		if(mtd->size < 1048576) { /* <1MiB in size, show size in KiB */
			size = mtd->size >> 10;
			unit = 'K';
		} else {
			size = mtd->size >> 20;
			unit = 'M';
		}
		snprintf(dev->mtd_name, sizeof(dev->mtd_name), "%d%ciB %s", size, unit, "PCMCIA Memory card");
	}

	/* If the memory found is fits completely into the mapped PCMCIA window,
	   use the faster non-remapping read/write functions */
	if(mtd->size <= dev->win_size) {
		DEBUG(1, "Using non remapping memory functions");
		dev->pcmcia_map.map_priv_2 = (unsigned long)dev->win_base;
		if (dev->pcmcia_map.bankwidth == 1) {
			dev->pcmcia_map.read = pcmcia_read8;
			dev->pcmcia_map.write = pcmcia_write8;
		} else {
			dev->pcmcia_map.read = pcmcia_read16;
			dev->pcmcia_map.write = pcmcia_write16;
		}
		dev->pcmcia_map.copy_from = pcmcia_copy_from;
		dev->pcmcia_map.copy_to = pcmcia_copy_to;
	}

	if(add_mtd_device(mtd)) {
		map_destroy(mtd);
		dev->mtd_info = NULL;
		err("Couldnt register MTD device");
		pcmciamtd_release(link);
		return -ENODEV;
	}
	snprintf(dev->node.dev_name, sizeof(dev->node.dev_name), "mtd%d", mtd->index);
	info("mtd%d: %s", mtd->index, mtd->name);
	link->dev_node = &dev->node;
	return 0;

 cs_failed:
	cs_error(link, last_fn, last_ret);
	err("CS Error, exiting");
	pcmciamtd_release(link);
	return -ENODEV;
}


static int pcmciamtd_suspend(struct pcmcia_device *dev)
{
	DEBUG(2, "EVENT_PM_RESUME");

	/* get_lock(link); */

	return 0;
}

static int pcmciamtd_resume(struct pcmcia_device *dev)
{
	DEBUG(2, "EVENT_PM_SUSPEND");

	/* free_lock(link); */

	return 0;
}


/* This deletes a driver "instance".  The device is de-registered
 * with Card Services.  If it has been released, all local data
 * structures are freed.  Otherwise, the structures will be freed
 * when the device is released.
 */

static void pcmciamtd_detach(struct pcmcia_device *link)
{
	struct pcmciamtd_dev *dev = link->priv;

	DEBUG(3, "link=0x%p", link);

	if(dev->mtd_info) {
		del_mtd_device(dev->mtd_info);
		map_destroy(dev->mtd_info);
		info("mtd%d: Removed", dev->mtd_info->index);
	}

	pcmciamtd_release(link);
}


/* pcmciamtd_attach() creates an "instance" of the driver, allocating
 * local data structures for one device.  The device is registered
 * with Card Services.
 */

static int pcmciamtd_probe(struct pcmcia_device *link)
{
	struct pcmciamtd_dev *dev;

	/* Create new memory card device */
	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev) return -ENOMEM;
	DEBUG(1, "dev=0x%p", dev);

	memset(dev, 0, sizeof(*dev));
	dev->p_dev = link;
	link->priv = dev;

	link->conf.Attributes = 0;
	link->conf.IntType = INT_MEMORY;

	return pcmciamtd_config(link);
}

static struct pcmcia_device_id pcmciamtd_ids[] = {
	PCMCIA_DEVICE_FUNC_ID(1),
	PCMCIA_DEVICE_PROD_ID123("IO DATA", "PCS-2M", "2MB SRAM", 0x547e66dc, 0x1fed36cd, 0x36eadd21),
	PCMCIA_DEVICE_PROD_ID12("IBM", "2MB SRAM", 0xb569a6e5, 0x36eadd21),
	PCMCIA_DEVICE_PROD_ID12("IBM", "4MB FLASH", 0xb569a6e5, 0x8bc54d2a),
	PCMCIA_DEVICE_PROD_ID12("IBM", "8MB FLASH", 0xb569a6e5, 0x6df1be3e),
	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E20SW", 0x816cc815, 0xd14c9dcf),
	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E8 SW", 0x816cc815, 0xa2d7dedb),
	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-02 ", 0x40ade711, 0x145cea5c),
	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-04 ", 0x40ade711, 0x42064dda),
	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-20 ", 0x40ade711, 0x25ee5cb0),
	PCMCIA_DEVICE_PROD_ID12("intel", "VALUE SERIES 100 ", 0x40ade711, 0xdf8506d8),
	PCMCIA_DEVICE_PROD_ID12("KINGMAX TECHNOLOGY INC.", "SRAM 256K Bytes", 0x54d0c69c, 0xad12c29c),
	PCMCIA_DEVICE_PROD_ID12("Maxtor", "MAXFL MobileMax Flash Memory Card", 0xb68968c8, 0x2dfb47b0),
	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB101EN20", 0xf9876baf, 0xad0b207b),
	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB513EN20", 0xf9876baf, 0xe8d884ad),
	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-3000", 0x05ddca47, 0xe7d67bca),
	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-4100", 0x05ddca47, 0x7bc32944),
	/* the following was commented out in pcmcia-cs-3.2.7 */
	/* PCMCIA_DEVICE_PROD_ID12("RATOC Systems,Inc.", "SmartMedia ADAPTER PC Card", 0xf4a2fefe, 0x5885b2ae), */
#ifdef CONFIG_MTD_PCMCIA_ANONYMOUS
	{ .match_flags = PCMCIA_DEV_ID_MATCH_ANONYMOUS, },
#endif
	PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, pcmciamtd_ids);

static struct pcmcia_driver pcmciamtd_driver = {
	.drv		= {
		.name	= "pcmciamtd"
	},
	.probe		= pcmciamtd_probe,
	.remove		= pcmciamtd_detach,
	.owner		= THIS_MODULE,
	.id_table	= pcmciamtd_ids,
	.suspend	= pcmciamtd_suspend,
	.resume		= pcmciamtd_resume,
};


static int __init init_pcmciamtd(void)
{
	info(DRIVER_DESC " " DRIVER_VERSION);

	if(bankwidth && bankwidth != 1 && bankwidth != 2) {
		info("bad bankwidth (%d), using default", bankwidth);
		bankwidth = 2;
	}
	if(force_size && (force_size < 1 || force_size > 64)) {
		info("bad force_size (%d), using default", force_size);
		force_size = 0;
	}
	if(mem_type && mem_type != 1 && mem_type != 2) {
		info("bad mem_type (%d), using default", mem_type);
		mem_type = 0;
	}
	return pcmcia_register_driver(&pcmciamtd_driver);
}


static void __exit exit_pcmciamtd(void)
{
	DEBUG(1, DRIVER_DESC " unloading");
	pcmcia_unregister_driver(&pcmciamtd_driver);
}

module_init(init_pcmciamtd);
module_exit(exit_pcmciamtd);