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