/* * 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, .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, .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);