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Linux/drivers/ata/sata_uli.c

  1 /*
  2  *  sata_uli.c - ULi Electronics SATA
  3  *
  4  *
  5  *  This program is free software; you can redistribute it and/or modify
  6  *  it under the terms of the GNU General Public License as published by
  7  *  the Free Software Foundation; either version 2, or (at your option)
  8  *  any later version.
  9  *
 10  *  This program is distributed in the hope that it will be useful,
 11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  *  GNU General Public License for more details.
 14  *
 15  *  You should have received a copy of the GNU General Public License
 16  *  along with this program; see the file COPYING.  If not, write to
 17  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 18  *
 19  *
 20  *  libata documentation is available via 'make {ps|pdf}docs',
 21  *  as Documentation/DocBook/libata.*
 22  *
 23  *  Hardware documentation available under NDA.
 24  *
 25  */
 26 
 27 #include <linux/kernel.h>
 28 #include <linux/module.h>
 29 #include <linux/gfp.h>
 30 #include <linux/pci.h>
 31 #include <linux/init.h>
 32 #include <linux/blkdev.h>
 33 #include <linux/delay.h>
 34 #include <linux/interrupt.h>
 35 #include <linux/device.h>
 36 #include <scsi/scsi_host.h>
 37 #include <linux/libata.h>
 38 
 39 #define DRV_NAME        "sata_uli"
 40 #define DRV_VERSION     "1.3"
 41 
 42 enum {
 43         uli_5289                = 0,
 44         uli_5287                = 1,
 45         uli_5281                = 2,
 46 
 47         uli_max_ports           = 4,
 48 
 49         /* PCI configuration registers */
 50         ULI5287_BASE            = 0x90, /* sata0 phy SCR registers */
 51         ULI5287_OFFS            = 0x10, /* offset from sata0->sata1 phy regs */
 52         ULI5281_BASE            = 0x60, /* sata0 phy SCR  registers */
 53         ULI5281_OFFS            = 0x60, /* offset from sata0->sata1 phy regs */
 54 };
 55 
 56 struct uli_priv {
 57         unsigned int            scr_cfg_addr[uli_max_ports];
 58 };
 59 
 60 static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
 61 static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
 62 static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
 63 
 64 static const struct pci_device_id uli_pci_tbl[] = {
 65         { PCI_VDEVICE(AL, 0x5289), uli_5289 },
 66         { PCI_VDEVICE(AL, 0x5287), uli_5287 },
 67         { PCI_VDEVICE(AL, 0x5281), uli_5281 },
 68 
 69         { }     /* terminate list */
 70 };
 71 
 72 static struct pci_driver uli_pci_driver = {
 73         .name                   = DRV_NAME,
 74         .id_table               = uli_pci_tbl,
 75         .probe                  = uli_init_one,
 76         .remove                 = ata_pci_remove_one,
 77 };
 78 
 79 static struct scsi_host_template uli_sht = {
 80         ATA_BMDMA_SHT(DRV_NAME),
 81 };
 82 
 83 static struct ata_port_operations uli_ops = {
 84         .inherits               = &ata_bmdma_port_ops,
 85         .scr_read               = uli_scr_read,
 86         .scr_write              = uli_scr_write,
 87         .hardreset              = ATA_OP_NULL,
 88 };
 89 
 90 static const struct ata_port_info uli_port_info = {
 91         .flags          = ATA_FLAG_SATA | ATA_FLAG_IGN_SIMPLEX,
 92         .pio_mask       = ATA_PIO4,
 93         .udma_mask      = ATA_UDMA6,
 94         .port_ops       = &uli_ops,
 95 };
 96 
 97 
 98 MODULE_AUTHOR("Peer Chen");
 99 MODULE_DESCRIPTION("low-level driver for ULi Electronics SATA controller");
100 MODULE_LICENSE("GPL");
101 MODULE_DEVICE_TABLE(pci, uli_pci_tbl);
102 MODULE_VERSION(DRV_VERSION);
103 
104 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
105 {
106         struct uli_priv *hpriv = ap->host->private_data;
107         return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg);
108 }
109 
110 static u32 uli_scr_cfg_read(struct ata_link *link, unsigned int sc_reg)
111 {
112         struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
113         unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg);
114         u32 val;
115 
116         pci_read_config_dword(pdev, cfg_addr, &val);
117         return val;
118 }
119 
120 static void uli_scr_cfg_write(struct ata_link *link, unsigned int scr, u32 val)
121 {
122         struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
123         unsigned int cfg_addr = get_scr_cfg_addr(link->ap, scr);
124 
125         pci_write_config_dword(pdev, cfg_addr, val);
126 }
127 
128 static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
129 {
130         if (sc_reg > SCR_CONTROL)
131                 return -EINVAL;
132 
133         *val = uli_scr_cfg_read(link, sc_reg);
134         return 0;
135 }
136 
137 static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
138 {
139         if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
140                 return -EINVAL;
141 
142         uli_scr_cfg_write(link, sc_reg, val);
143         return 0;
144 }
145 
146 static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
147 {
148         const struct ata_port_info *ppi[] = { &uli_port_info, NULL };
149         unsigned int board_idx = (unsigned int) ent->driver_data;
150         struct ata_host *host;
151         struct uli_priv *hpriv;
152         void __iomem * const *iomap;
153         struct ata_ioports *ioaddr;
154         int n_ports, rc;
155 
156         ata_print_version_once(&pdev->dev, DRV_VERSION);
157 
158         rc = pcim_enable_device(pdev);
159         if (rc)
160                 return rc;
161 
162         n_ports = 2;
163         if (board_idx == uli_5287)
164                 n_ports = 4;
165 
166         /* allocate the host */
167         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
168         if (!host)
169                 return -ENOMEM;
170 
171         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
172         if (!hpriv)
173                 return -ENOMEM;
174         host->private_data = hpriv;
175 
176         /* the first two ports are standard SFF */
177         rc = ata_pci_sff_init_host(host);
178         if (rc)
179                 return rc;
180 
181         ata_pci_bmdma_init(host);
182 
183         iomap = host->iomap;
184 
185         switch (board_idx) {
186         case uli_5287:
187                 /* If there are four, the last two live right after
188                  * the standard SFF ports.
189                  */
190                 hpriv->scr_cfg_addr[0] = ULI5287_BASE;
191                 hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
192 
193                 ioaddr = &host->ports[2]->ioaddr;
194                 ioaddr->cmd_addr = iomap[0] + 8;
195                 ioaddr->altstatus_addr =
196                 ioaddr->ctl_addr = (void __iomem *)
197                         ((unsigned long)iomap[1] | ATA_PCI_CTL_OFS) + 4;
198                 ioaddr->bmdma_addr = iomap[4] + 16;
199                 hpriv->scr_cfg_addr[2] = ULI5287_BASE + ULI5287_OFFS*4;
200                 ata_sff_std_ports(ioaddr);
201 
202                 ata_port_desc(host->ports[2],
203                         "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
204                         (unsigned long long)pci_resource_start(pdev, 0) + 8,
205                         ((unsigned long long)pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4,
206                         (unsigned long long)pci_resource_start(pdev, 4) + 16);
207 
208                 ioaddr = &host->ports[3]->ioaddr;
209                 ioaddr->cmd_addr = iomap[2] + 8;
210                 ioaddr->altstatus_addr =
211                 ioaddr->ctl_addr = (void __iomem *)
212                         ((unsigned long)iomap[3] | ATA_PCI_CTL_OFS) + 4;
213                 ioaddr->bmdma_addr = iomap[4] + 24;
214                 hpriv->scr_cfg_addr[3] = ULI5287_BASE + ULI5287_OFFS*5;
215                 ata_sff_std_ports(ioaddr);
216 
217                 ata_port_desc(host->ports[2],
218                         "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
219                         (unsigned long long)pci_resource_start(pdev, 2) + 9,
220                         ((unsigned long long)pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4,
221                         (unsigned long long)pci_resource_start(pdev, 4) + 24);
222 
223                 break;
224 
225         case uli_5289:
226                 hpriv->scr_cfg_addr[0] = ULI5287_BASE;
227                 hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
228                 break;
229 
230         case uli_5281:
231                 hpriv->scr_cfg_addr[0] = ULI5281_BASE;
232                 hpriv->scr_cfg_addr[1] = ULI5281_BASE + ULI5281_OFFS;
233                 break;
234 
235         default:
236                 BUG();
237                 break;
238         }
239 
240         pci_set_master(pdev);
241         pci_intx(pdev, 1);
242         return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
243                                  IRQF_SHARED, &uli_sht);
244 }
245 
246 module_pci_driver(uli_pci_driver);
247 

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