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- /*
- * 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 "0.0.2"
- #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)
- iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
- else
- ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
- if (unlikely(slop)) {
- u32 pad;
- if (write_data) {
- memcpy(&pad, buf + buflen - slop, slop);
- pad = le32_to_cpu(pad);
- iowrite32(pad, ap->ioaddr.data_addr);
- } else {
- pad = ioread32(ap->ioaddr.data_addr);
- pad = cpu_to_le16(pad);
- memcpy(buf + buflen - slop, &pad, slop);
- }
- }
- } else
- ata_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,
- .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,
- .slave_destroy = ata_scsi_slave_destroy,
- .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,
- .irq_on = ata_irq_on,
- .irq_ack = ata_irq_ack,
- .port_start = ata_port_start,
- };
- /**
- * 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 ++) {
- unsigned long cmd_port = 0x1F0 - (0x80 * i);
- void __iomem *cmd_addr, *ctl_addr;
- 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 (IS_ERR(pdev))
- return PTR_ERR(pdev);
- cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
- ctl_addr = devm_ioport_map(&pdev->dev, cmd_port + 0x0206, 1);
- if (!cmd_addr || !ctl_addr) {
- platform_device_unregister(pdev);
- 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 = cmd_addr;
- ae.port[0].altstatus_addr = ctl_addr;
- ae.port[0].ctl_addr = ctl_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_detach(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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