1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ITE 8213 IDE driver
4 *
5 * Copyright (C) 2006 Jack Lee
6 * Copyright (C) 2006 Alan Cox
7 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/pci.h>
14 #include <linux/ide.h>
15 #include <linux/init.h>
16
17 #define DRV_NAME "it8213"
18
19 /**
20 * it8213_set_pio_mode - set host controller for PIO mode
21 * @hwif: port
22 * @drive: drive
23 *
24 * Set the interface PIO mode.
25 */
26
it8213_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)27 static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
28 {
29 struct pci_dev *dev = to_pci_dev(hwif->dev);
30 int is_slave = drive->dn & 1;
31 int master_port = 0x40;
32 int slave_port = 0x44;
33 unsigned long flags;
34 u16 master_data;
35 u8 slave_data;
36 static DEFINE_SPINLOCK(tune_lock);
37 int control = 0;
38 const u8 pio = drive->pio_mode - XFER_PIO_0;
39
40 static const u8 timings[][2] = {
41 { 0, 0 },
42 { 0, 0 },
43 { 1, 0 },
44 { 2, 1 },
45 { 2, 3 }, };
46
47 spin_lock_irqsave(&tune_lock, flags);
48 pci_read_config_word(dev, master_port, &master_data);
49
50 if (pio > 1)
51 control |= 1; /* Programmable timing on */
52 if (drive->media != ide_disk)
53 control |= 4; /* ATAPI */
54 if (ide_pio_need_iordy(drive, pio))
55 control |= 2; /* IORDY */
56 if (is_slave) {
57 master_data |= 0x4000;
58 master_data &= ~0x0070;
59 if (pio > 1)
60 master_data = master_data | (control << 4);
61 pci_read_config_byte(dev, slave_port, &slave_data);
62 slave_data = slave_data & 0xf0;
63 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
64 } else {
65 master_data &= ~0x3307;
66 if (pio > 1)
67 master_data = master_data | control;
68 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
69 }
70 pci_write_config_word(dev, master_port, master_data);
71 if (is_slave)
72 pci_write_config_byte(dev, slave_port, slave_data);
73 spin_unlock_irqrestore(&tune_lock, flags);
74 }
75
76 /**
77 * it8213_set_dma_mode - set host controller for DMA mode
78 * @hwif: port
79 * @drive: drive
80 *
81 * Tune the ITE chipset for the DMA mode.
82 */
83
it8213_set_dma_mode(ide_hwif_t * hwif,ide_drive_t * drive)84 static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
85 {
86 struct pci_dev *dev = to_pci_dev(hwif->dev);
87 u8 maslave = 0x40;
88 int a_speed = 3 << (drive->dn * 4);
89 int u_flag = 1 << drive->dn;
90 int v_flag = 0x01 << drive->dn;
91 int w_flag = 0x10 << drive->dn;
92 int u_speed = 0;
93 u16 reg4042, reg4a;
94 u8 reg48, reg54, reg55;
95 const u8 speed = drive->dma_mode;
96
97 pci_read_config_word(dev, maslave, ®4042);
98 pci_read_config_byte(dev, 0x48, ®48);
99 pci_read_config_word(dev, 0x4a, ®4a);
100 pci_read_config_byte(dev, 0x54, ®54);
101 pci_read_config_byte(dev, 0x55, ®55);
102
103 if (speed >= XFER_UDMA_0) {
104 u8 udma = speed - XFER_UDMA_0;
105
106 u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
107
108 if (!(reg48 & u_flag))
109 pci_write_config_byte(dev, 0x48, reg48 | u_flag);
110 if (speed >= XFER_UDMA_5)
111 pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
112 else
113 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
114
115 if ((reg4a & a_speed) != u_speed)
116 pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
117 if (speed > XFER_UDMA_2) {
118 if (!(reg54 & v_flag))
119 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
120 } else
121 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
122 } else {
123 const u8 mwdma_to_pio[] = { 0, 3, 4 };
124
125 if (reg48 & u_flag)
126 pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
127 if (reg4a & a_speed)
128 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
129 if (reg54 & v_flag)
130 pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
131 if (reg55 & w_flag)
132 pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
133
134 if (speed >= XFER_MW_DMA_0)
135 drive->pio_mode =
136 mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
137 else
138 drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
139
140 it8213_set_pio_mode(hwif, drive);
141 }
142 }
143
it8213_cable_detect(ide_hwif_t * hwif)144 static u8 it8213_cable_detect(ide_hwif_t *hwif)
145 {
146 struct pci_dev *dev = to_pci_dev(hwif->dev);
147 u8 reg42h = 0;
148
149 pci_read_config_byte(dev, 0x42, ®42h);
150
151 return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
152 }
153
154 static const struct ide_port_ops it8213_port_ops = {
155 .set_pio_mode = it8213_set_pio_mode,
156 .set_dma_mode = it8213_set_dma_mode,
157 .cable_detect = it8213_cable_detect,
158 };
159
160 static const struct ide_port_info it8213_chipset = {
161 .name = DRV_NAME,
162 .enablebits = { {0x41, 0x80, 0x80} },
163 .port_ops = &it8213_port_ops,
164 .host_flags = IDE_HFLAG_SINGLE,
165 .pio_mask = ATA_PIO4,
166 .swdma_mask = ATA_SWDMA2_ONLY,
167 .mwdma_mask = ATA_MWDMA12_ONLY,
168 .udma_mask = ATA_UDMA6,
169 };
170
171 /**
172 * it8213_init_one - pci layer discovery entry
173 * @dev: PCI device
174 * @id: ident table entry
175 *
176 * Called by the PCI code when it finds an ITE8213 controller. As
177 * this device follows the standard interfaces we can use the
178 * standard helper functions to do almost all the work for us.
179 */
180
it8213_init_one(struct pci_dev * dev,const struct pci_device_id * id)181 static int it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
182 {
183 return ide_pci_init_one(dev, &it8213_chipset, NULL);
184 }
185
186 static const struct pci_device_id it8213_pci_tbl[] = {
187 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
188 { 0, },
189 };
190
191 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
192
193 static struct pci_driver it8213_pci_driver = {
194 .name = "ITE8213_IDE",
195 .id_table = it8213_pci_tbl,
196 .probe = it8213_init_one,
197 .remove = ide_pci_remove,
198 .suspend = ide_pci_suspend,
199 .resume = ide_pci_resume,
200 };
201
it8213_ide_init(void)202 static int __init it8213_ide_init(void)
203 {
204 return ide_pci_register_driver(&it8213_pci_driver);
205 }
206
it8213_ide_exit(void)207 static void __exit it8213_ide_exit(void)
208 {
209 pci_unregister_driver(&it8213_pci_driver);
210 }
211
212 module_init(it8213_ide_init);
213 module_exit(it8213_ide_exit);
214
215 MODULE_AUTHOR("Jack Lee, Alan Cox");
216 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
217 MODULE_LICENSE("GPL");
218