[PATCH] libata: Winbond support (7e45b0e5) · Commits · 戴 / test

drivers/ata/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -483,6 +483,13 @@ config PATA_WINBOND

		If unsure, say N.

		config PATA_WINBOND_VLB
		tristate "Winbond W83759A VLB PATA support (Experimental)"
		depends on ISA && EXPERIMENTAL
		help
		Support for the Winbond W83759A controller on Vesa Local Bus
		systems.

		endif
		endmenu

drivers/ata/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,7 @@ obj-$(CONFIG_PATA_SERVERWORKS) += pata_serverworks.o
		obj-$(CONFIG_PATA_SIL680) += pata_sil680.o
		obj-$(CONFIG_PATA_VIA) += pata_via.o
		obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
		obj-$(CONFIG_PATA_WINBOND_VLB) += pata_winbond.o
		obj-$(CONFIG_PATA_SIS) += pata_sis.o
		obj-$(CONFIG_PATA_TRIFLEX) += pata_triflex.o
		# Should be last but one libata driver

drivers/ata/pata_winbond.c

0 → 100644

+306 −0

Original line number	Diff line number	Diff line
		/*
		* pata_winbond.c - Winbond VLB ATA controllers
		* (C) 2006 Red Hat <alan@redhat.com>
		*
		* Support for the Winbond 83759A when operating in advanced mode.
		* Multichip mode is not currently supported.
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/pci.h>
		#include <linux/init.h>
		#include <linux/blkdev.h>
		#include <linux/delay.h>
		#include <scsi/scsi_host.h>
		#include <linux/libata.h>
		#include <linux/platform_device.h>

		#define DRV_NAME "pata_winbond"
		#define DRV_VERSION "0.0.1"

		#define NR_HOST 4 /* Two winbond controllers, two channels each */

		struct winbond_data {
		unsigned long config;
		struct platform_device *platform_dev;
		};

		static struct ata_host *winbond_host[NR_HOST];
		static struct winbond_data winbond_data[NR_HOST];
		static int nr_winbond_host;

		#ifdef MODULE
		static int probe_winbond = 1;
		#else
		static int probe_winbond;
		#endif

		static spinlock_t winbond_lock = SPIN_LOCK_UNLOCKED;

		static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
		{
		unsigned long flags;
		spin_lock_irqsave(&winbond_lock, flags);
		outb(reg, port + 0x01);
		outb(val, port + 0x02);
		spin_unlock_irqrestore(&winbond_lock, flags);
		}

		static u8 winbond_readcfg(unsigned long port, u8 reg)
		{
		u8 val;

		unsigned long flags;
		spin_lock_irqsave(&winbond_lock, flags);
		outb(reg, port + 0x01);
		val = inb(port + 0x02);
		spin_unlock_irqrestore(&winbond_lock, flags);

		return val;
		}

		static void winbond_set_piomode(struct ata_port ap, struct ata_device adev)
		{
		struct ata_timing t;
		struct winbond_data *winbond = ap->host->private_data;
		int active, recovery;
		u8 reg;
		int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);

		reg = winbond_readcfg(winbond->config, 0x81);

		/* Get the timing data in cycles */
		if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
		ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
		else
		ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);

		active = (FIT(t.active, 3, 17) - 1) & 0x0F;
		recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F;
		timing = (active << 4) \| recovery;
		winbond_writecfg(winbond->config, timing, reg);

		/* Load the setup timing */

		reg = 0x35;
		if (adev->class != ATA_DEV_ATA)
		reg \|= 0x08; /* FIFO off */
		if (!ata_pio_need_iordy(adev))
		reg \|= 0x02; /* IORDY off */
		reg \|= (FIT(t.setup, 0, 3) << 6);
		winbond_writecfg(winbond->config, timing + 1, reg);
		}


		static void winbond_data_xfer(struct ata_device adev, unsigned char buf, unsigned int buflen, int write_data)
		{
		struct ata_port *ap = adev->ap;
		int slop = buflen & 3;

		if (ata_id_has_dword_io(adev->id)) {
		if (write_data)
		outsl(ap->ioaddr.data_addr, buf, buflen >> 2);
		else
		insl(ap->ioaddr.data_addr, buf, buflen >> 2);

		if (unlikely(slop)) {
		u32 pad;
		if (write_data) {
		memcpy(&pad, buf + buflen - slop, slop);
		outl(le32_to_cpu(pad), ap->ioaddr.data_addr);
		} else {
		pad = cpu_to_le16(inl(ap->ioaddr.data_addr));
		memcpy(buf + buflen - slop, &pad, slop);
		}
		}
		} else
		ata_pio_data_xfer(adev, buf, buflen, write_data);
		}

		static struct scsi_host_template winbond_sht = {
		.module = THIS_MODULE,
		.name = DRV_NAME,
		.ioctl = ata_scsi_ioctl,
		.queuecommand = ata_scsi_queuecmd,
		.can_queue = ATA_DEF_QUEUE,
		.this_id = ATA_SHT_THIS_ID,
		.sg_tablesize = LIBATA_MAX_PRD,
		.max_sectors = ATA_MAX_SECTORS,
		.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
		.emulated = ATA_SHT_EMULATED,
		.use_clustering = ATA_SHT_USE_CLUSTERING,
		.proc_name = DRV_NAME,
		.dma_boundary = ATA_DMA_BOUNDARY,
		.slave_configure = ata_scsi_slave_config,
		.bios_param = ata_std_bios_param,
		};

		static struct ata_port_operations winbond_port_ops = {
		.port_disable = ata_port_disable,
		.set_piomode = winbond_set_piomode,

		.tf_load = ata_tf_load,
		.tf_read = ata_tf_read,
		.check_status = ata_check_status,
		.exec_command = ata_exec_command,
		.dev_select = ata_std_dev_select,

		.freeze = ata_bmdma_freeze,
		.thaw = ata_bmdma_thaw,
		.error_handler = ata_bmdma_error_handler,
		.post_internal_cmd = ata_bmdma_post_internal_cmd,

		.qc_prep = ata_qc_prep,
		.qc_issue = ata_qc_issue_prot,

		.data_xfer = winbond_data_xfer,

		.irq_handler = ata_interrupt,
		.irq_clear = ata_bmdma_irq_clear,

		.port_start = ata_port_start,
		.port_stop = ata_port_stop,
		.host_stop = ata_host_stop
		};

		/**
		* winbond_init_one - attach a winbond interface
		* @type: Type to display
		* @io: I/O port start
		* @irq: interrupt line
		* @fast: True if on a > 33Mhz VLB
		*
		* Register a VLB bus IDE interface. Such interfaces are PIO and we
		* assume do not support IRQ sharing.
		*/

		static __init int winbond_init_one(unsigned long port)
		{
		struct ata_probe_ent ae;
		struct platform_device *pdev;
		int ret;
		u8 reg;
		int i;

		reg = winbond_readcfg(port, 0x81);
		reg \|= 0x80; /* jumpered mode off */
		winbond_writecfg(port, 0x81, reg);
		reg = winbond_readcfg(port, 0x83);
		reg \|= 0xF0; /* local control */
		winbond_writecfg(port, 0x83, reg);
		reg = winbond_readcfg(port, 0x85);
		reg \|= 0xF0; /* programmable timing */
		winbond_writecfg(port, 0x85, reg);

		reg = winbond_readcfg(port, 0x81);

		if (!(reg & 0x03)) /* Disabled */
		return 0;

		for (i = 0; i < 2 ; i ++) {

		if (reg & (1 << i)) {
		/*
		* Fill in a probe structure first of all
		*/

		pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
		if (pdev == NULL)
		return -ENOMEM;

		memset(&ae, 0, sizeof(struct ata_probe_ent));
		INIT_LIST_HEAD(&ae.node);
		ae.dev = &pdev->dev;

		ae.port_ops = &winbond_port_ops;
		ae.pio_mask = 0x1F;

		ae.sht = &winbond_sht;

		ae.n_ports = 1;
		ae.irq = 14 + i;
		ae.irq_flags = 0;
		ae.port_flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST;
		ae.port[0].cmd_addr = 0x1F0 - (0x80 * i);
		ae.port[0].altstatus_addr = ae.port[0].cmd_addr + 0x0206;
		ae.port[0].ctl_addr = ae.port[0].altstatus_addr;
		ata_std_ports(&ae.port[0]);
		/*
		* Hook in a private data structure per channel
		*/
		ae.private_data = &winbond_data[nr_winbond_host];
		winbond_data[nr_winbond_host].config = port;
		winbond_data[nr_winbond_host].platform_dev = pdev;

		ret = ata_device_add(&ae);
		if (ret == 0) {
		platform_device_unregister(pdev);
		return -ENODEV;
		}
		winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
		}
		}

		return 0;
		}

		/**
		* winbond_init - attach winbond interfaces
		*
		* Attach winbond IDE interfaces by scanning the ports it may occupy.
		*/

		static __init int winbond_init(void)
		{
		static const unsigned long config[2] = { 0x130, 0x1B0 };

		int ct = 0;
		int i;

		if (probe_winbond == 0)
		return -ENODEV;

		/*
		* Check both base addresses
		*/

		for (i = 0; i < 2; i++) {
		if (probe_winbond & (1<<i)) {
		int ret = 0;
		unsigned long port = config[i];

		if (request_region(port, 2, "pata_winbond")) {
		ret = winbond_init_one(port);
		if(ret <= 0)
		release_region(port, 2);
		else ct+= ret;
		}
		}
		}
		if (ct != 0)
		return 0;
		return -ENODEV;
		}

		static __exit void winbond_exit(void)
		{
		int i;

		for (i = 0; i < nr_winbond_host; i++) {
		ata_host_remove(winbond_host[i]);
		release_region(winbond_data[i].config, 2);
		platform_device_unregister(winbond_data[i].platform_dev);
		}
		}

		MODULE_AUTHOR("Alan Cox");
		MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
		MODULE_LICENSE("GPL");
		MODULE_VERSION(DRV_VERSION);

		module_init(winbond_init);
		module_exit(winbond_exit);

		module_param(probe_winbond, int, 0);

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