Merge tag 'riscv-for-linus-5.15-rc8' of git://git.kernel.org/pub/scm/linux/kernel...
[platform/kernel/linux-starfive.git] / drivers / ata / sata_uli.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  sata_uli.c - ULi Electronics SATA
4  *
5  *  libata documentation is available via 'make {ps|pdf}docs',
6  *  as Documentation/driver-api/libata.rst
7  *
8  *  Hardware documentation available under NDA.
9  */
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/gfp.h>
14 #include <linux/pci.h>
15 #include <linux/blkdev.h>
16 #include <linux/delay.h>
17 #include <linux/interrupt.h>
18 #include <linux/device.h>
19 #include <scsi/scsi_host.h>
20 #include <linux/libata.h>
21
22 #define DRV_NAME        "sata_uli"
23 #define DRV_VERSION     "1.3"
24
25 enum {
26         uli_5289                = 0,
27         uli_5287                = 1,
28         uli_5281                = 2,
29
30         uli_max_ports           = 4,
31
32         /* PCI configuration registers */
33         ULI5287_BASE            = 0x90, /* sata0 phy SCR registers */
34         ULI5287_OFFS            = 0x10, /* offset from sata0->sata1 phy regs */
35         ULI5281_BASE            = 0x60, /* sata0 phy SCR  registers */
36         ULI5281_OFFS            = 0x60, /* offset from sata0->sata1 phy regs */
37 };
38
39 struct uli_priv {
40         unsigned int            scr_cfg_addr[uli_max_ports];
41 };
42
43 static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
44 static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
45 static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
46
47 static const struct pci_device_id uli_pci_tbl[] = {
48         { PCI_VDEVICE(AL, 0x5289), uli_5289 },
49         { PCI_VDEVICE(AL, 0x5287), uli_5287 },
50         { PCI_VDEVICE(AL, 0x5281), uli_5281 },
51
52         { }     /* terminate list */
53 };
54
55 static struct pci_driver uli_pci_driver = {
56         .name                   = DRV_NAME,
57         .id_table               = uli_pci_tbl,
58         .probe                  = uli_init_one,
59         .remove                 = ata_pci_remove_one,
60 };
61
62 static struct scsi_host_template uli_sht = {
63         ATA_BMDMA_SHT(DRV_NAME),
64 };
65
66 static struct ata_port_operations uli_ops = {
67         .inherits               = &ata_bmdma_port_ops,
68         .scr_read               = uli_scr_read,
69         .scr_write              = uli_scr_write,
70         .hardreset              = ATA_OP_NULL,
71 };
72
73 static const struct ata_port_info uli_port_info = {
74         .flags          = ATA_FLAG_SATA | ATA_FLAG_IGN_SIMPLEX,
75         .pio_mask       = ATA_PIO4,
76         .udma_mask      = ATA_UDMA6,
77         .port_ops       = &uli_ops,
78 };
79
80
81 MODULE_AUTHOR("Peer Chen");
82 MODULE_DESCRIPTION("low-level driver for ULi Electronics SATA controller");
83 MODULE_LICENSE("GPL");
84 MODULE_DEVICE_TABLE(pci, uli_pci_tbl);
85 MODULE_VERSION(DRV_VERSION);
86
87 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
88 {
89         struct uli_priv *hpriv = ap->host->private_data;
90         return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg);
91 }
92
93 static u32 uli_scr_cfg_read(struct ata_link *link, unsigned int sc_reg)
94 {
95         struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
96         unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg);
97         u32 val;
98
99         pci_read_config_dword(pdev, cfg_addr, &val);
100         return val;
101 }
102
103 static void uli_scr_cfg_write(struct ata_link *link, unsigned int scr, u32 val)
104 {
105         struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
106         unsigned int cfg_addr = get_scr_cfg_addr(link->ap, scr);
107
108         pci_write_config_dword(pdev, cfg_addr, val);
109 }
110
111 static int uli_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
112 {
113         if (sc_reg > SCR_CONTROL)
114                 return -EINVAL;
115
116         *val = uli_scr_cfg_read(link, sc_reg);
117         return 0;
118 }
119
120 static int uli_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
121 {
122         if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
123                 return -EINVAL;
124
125         uli_scr_cfg_write(link, sc_reg, val);
126         return 0;
127 }
128
129 static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
130 {
131         const struct ata_port_info *ppi[] = { &uli_port_info, NULL };
132         unsigned int board_idx = (unsigned int) ent->driver_data;
133         struct ata_host *host;
134         struct uli_priv *hpriv;
135         void __iomem * const *iomap;
136         struct ata_ioports *ioaddr;
137         int n_ports, rc;
138
139         ata_print_version_once(&pdev->dev, DRV_VERSION);
140
141         rc = pcim_enable_device(pdev);
142         if (rc)
143                 return rc;
144
145         n_ports = 2;
146         if (board_idx == uli_5287)
147                 n_ports = 4;
148
149         /* allocate the host */
150         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
151         if (!host)
152                 return -ENOMEM;
153
154         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
155         if (!hpriv)
156                 return -ENOMEM;
157         host->private_data = hpriv;
158
159         /* the first two ports are standard SFF */
160         rc = ata_pci_sff_init_host(host);
161         if (rc)
162                 return rc;
163
164         ata_pci_bmdma_init(host);
165
166         iomap = host->iomap;
167
168         switch (board_idx) {
169         case uli_5287:
170                 /* If there are four, the last two live right after
171                  * the standard SFF ports.
172                  */
173                 hpriv->scr_cfg_addr[0] = ULI5287_BASE;
174                 hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
175
176                 ioaddr = &host->ports[2]->ioaddr;
177                 ioaddr->cmd_addr = iomap[0] + 8;
178                 ioaddr->altstatus_addr =
179                 ioaddr->ctl_addr = (void __iomem *)
180                         ((unsigned long)iomap[1] | ATA_PCI_CTL_OFS) + 4;
181                 ioaddr->bmdma_addr = iomap[4] + 16;
182                 hpriv->scr_cfg_addr[2] = ULI5287_BASE + ULI5287_OFFS*4;
183                 ata_sff_std_ports(ioaddr);
184
185                 ata_port_desc(host->ports[2],
186                         "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
187                         (unsigned long long)pci_resource_start(pdev, 0) + 8,
188                         ((unsigned long long)pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4,
189                         (unsigned long long)pci_resource_start(pdev, 4) + 16);
190
191                 ioaddr = &host->ports[3]->ioaddr;
192                 ioaddr->cmd_addr = iomap[2] + 8;
193                 ioaddr->altstatus_addr =
194                 ioaddr->ctl_addr = (void __iomem *)
195                         ((unsigned long)iomap[3] | ATA_PCI_CTL_OFS) + 4;
196                 ioaddr->bmdma_addr = iomap[4] + 24;
197                 hpriv->scr_cfg_addr[3] = ULI5287_BASE + ULI5287_OFFS*5;
198                 ata_sff_std_ports(ioaddr);
199
200                 ata_port_desc(host->ports[2],
201                         "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",
202                         (unsigned long long)pci_resource_start(pdev, 2) + 9,
203                         ((unsigned long long)pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4,
204                         (unsigned long long)pci_resource_start(pdev, 4) + 24);
205
206                 break;
207
208         case uli_5289:
209                 hpriv->scr_cfg_addr[0] = ULI5287_BASE;
210                 hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
211                 break;
212
213         case uli_5281:
214                 hpriv->scr_cfg_addr[0] = ULI5281_BASE;
215                 hpriv->scr_cfg_addr[1] = ULI5281_BASE + ULI5281_OFFS;
216                 break;
217
218         default:
219                 BUG();
220                 break;
221         }
222
223         pci_set_master(pdev);
224         pci_intx(pdev, 1);
225         return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
226                                  IRQF_SHARED, &uli_sht);
227 }
228
229 module_pci_driver(uli_pci_driver);